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* elf64-ppc.c (compare_symbols): Prefer strong dynamic global
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_branch_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc64_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_vma opd_entry_value
55 (asection *, bfd_vma, asection **, bfd_vma *);
56
57 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
58 #define TARGET_LITTLE_NAME "elf64-powerpcle"
59 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
60 #define TARGET_BIG_NAME "elf64-powerpc"
61 #define ELF_ARCH bfd_arch_powerpc
62 #define ELF_MACHINE_CODE EM_PPC64
63 #define ELF_MAXPAGESIZE 0x10000
64 #define elf_info_to_howto ppc64_elf_info_to_howto
65
66 #define elf_backend_want_got_sym 0
67 #define elf_backend_want_plt_sym 0
68 #define elf_backend_plt_alignment 3
69 #define elf_backend_plt_not_loaded 1
70 #define elf_backend_got_header_size 8
71 #define elf_backend_can_gc_sections 1
72 #define elf_backend_can_refcount 1
73 #define elf_backend_rela_normal 1
74
75 #define bfd_elf64_mkobject ppc64_elf_mkobject
76 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
77 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
78 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
79 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
80 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
81 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
82
83 #define elf_backend_object_p ppc64_elf_object_p
84 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
85 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
86 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
87 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
88 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
89 #define elf_backend_check_directives ppc64_elf_check_directives
90 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
91 #define elf_backend_check_relocs ppc64_elf_check_relocs
92 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
93 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
94 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
95 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
96 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
97 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
98 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
99 #define elf_backend_action_discarded ppc64_elf_action_discarded
100 #define elf_backend_relocate_section ppc64_elf_relocate_section
101 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
102 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
103 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
104 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
105 #define elf_backend_special_sections ppc64_elf_special_sections
106
107 /* The name of the dynamic interpreter. This is put in the .interp
108 section. */
109 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
110
111 /* The size in bytes of an entry in the procedure linkage table. */
112 #define PLT_ENTRY_SIZE 24
113
114 /* The initial size of the plt reserved for the dynamic linker. */
115 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
116
117 /* TOC base pointers offset from start of TOC. */
118 #define TOC_BASE_OFF 0x8000
119
120 /* Offset of tp and dtp pointers from start of TLS block. */
121 #define TP_OFFSET 0x7000
122 #define DTP_OFFSET 0x8000
123
124 /* .plt call stub instructions. The normal stub is like this, but
125 sometimes the .plt entry crosses a 64k boundary and we need to
126 insert an addis to adjust r12. */
127 #define PLT_CALL_STUB_SIZE (7*4)
128 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
129 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
130 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
131 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
132 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
133 /* ld %r11,xxx+16@l(%r12) */
134 #define BCTR 0x4e800420 /* bctr */
135
136
137 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
138 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
139
140 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
141
142 /* glink call stub instructions. We enter with the index in R0, and the
143 address of glink entry in CTR. From that, we can calculate PLT0. */
144 #define GLINK_CALL_STUB_SIZE (16*4)
145 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
146 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
147 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
148 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
149 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
150 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
151 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
152 /* sub %r12,%r12,%r11 */
153 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
154 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
155 /* ld %r11,xxx@l(%r12) */
156 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
157 /* ld %r2,8(%r12) */
158 /* mtctr %r11 */
159 /* ld %r11,16(%r12) */
160 /* bctr */
161
162 /* Pad with this. */
163 #define NOP 0x60000000
164
165 /* Some other nops. */
166 #define CROR_151515 0x4def7b82
167 #define CROR_313131 0x4ffffb82
168
169 /* .glink entries for the first 32k functions are two instructions. */
170 #define LI_R0_0 0x38000000 /* li %r0,0 */
171 #define B_DOT 0x48000000 /* b . */
172
173 /* After that, we need two instructions to load the index, followed by
174 a branch. */
175 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
176 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
177
178 /* Instructions used by the save and restore reg functions. */
179 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
180 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
181 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
182 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
183 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
184 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
185 #define LI_R12_0 0x39800000 /* li %r12,0 */
186 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
187 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
188 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
189 #define BLR 0x4e800020 /* blr */
190
191 /* Since .opd is an array of descriptors and each entry will end up
192 with identical R_PPC64_RELATIVE relocs, there is really no need to
193 propagate .opd relocs; The dynamic linker should be taught to
194 relocate .opd without reloc entries. */
195 #ifndef NO_OPD_RELOCS
196 #define NO_OPD_RELOCS 0
197 #endif
198 \f
199 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
200
201 /* Relocation HOWTO's. */
202 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
203
204 static reloc_howto_type ppc64_elf_howto_raw[] = {
205 /* This reloc does nothing. */
206 HOWTO (R_PPC64_NONE, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC64_NONE", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* A standard 32 bit relocation. */
221 HOWTO (R_PPC64_ADDR32, /* type */
222 0, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 32, /* bitsize */
225 FALSE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_bitfield, /* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_PPC64_ADDR32", /* name */
230 FALSE, /* partial_inplace */
231 0, /* src_mask */
232 0xffffffff, /* dst_mask */
233 FALSE), /* pcrel_offset */
234
235 /* An absolute 26 bit branch; the lower two bits must be zero.
236 FIXME: we don't check that, we just clear them. */
237 HOWTO (R_PPC64_ADDR24, /* type */
238 0, /* rightshift */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
240 26, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR24", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0x03fffffc, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* A standard 16 bit relocation. */
252 HOWTO (R_PPC64_ADDR16, /* type */
253 0, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_bitfield, /* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC64_ADDR16", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* A 16 bit relocation without overflow. */
267 HOWTO (R_PPC64_ADDR16_LO, /* type */
268 0, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont,/* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC64_ADDR16_LO", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* Bits 16-31 of an address. */
282 HOWTO (R_PPC64_ADDR16_HI, /* type */
283 16, /* rightshift */
284 1, /* size (0 = byte, 1 = short, 2 = long) */
285 16, /* bitsize */
286 FALSE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_dont, /* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_PPC64_ADDR16_HI", /* name */
291 FALSE, /* partial_inplace */
292 0, /* src_mask */
293 0xffff, /* dst_mask */
294 FALSE), /* pcrel_offset */
295
296 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
297 bits, treated as a signed number, is negative. */
298 HOWTO (R_PPC64_ADDR16_HA, /* type */
299 16, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_dont, /* complain_on_overflow */
305 ppc64_elf_ha_reloc, /* special_function */
306 "R_PPC64_ADDR16_HA", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 /* An absolute 16 bit branch; the lower two bits must be zero.
313 FIXME: we don't check that, we just clear them. */
314 HOWTO (R_PPC64_ADDR14, /* type */
315 0, /* rightshift */
316 2, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_bitfield, /* complain_on_overflow */
321 ppc64_elf_branch_reloc, /* special_function */
322 "R_PPC64_ADDR14", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0x0000fffc, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* An absolute 16 bit branch, for which bit 10 should be set to
329 indicate that the branch is expected to be taken. The lower two
330 bits must be zero. */
331 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
332 0, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 0, /* bitpos */
337 complain_overflow_bitfield, /* complain_on_overflow */
338 ppc64_elf_brtaken_reloc, /* special_function */
339 "R_PPC64_ADDR14_BRTAKEN",/* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0000fffc, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* An absolute 16 bit branch, for which bit 10 should be set to
346 indicate that the branch is not expected to be taken. The lower
347 two bits must be zero. */
348 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 16, /* bitsize */
352 FALSE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_bitfield, /* complain_on_overflow */
355 ppc64_elf_brtaken_reloc, /* special_function */
356 "R_PPC64_ADDR14_BRNTAKEN",/* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0x0000fffc, /* dst_mask */
360 FALSE), /* pcrel_offset */
361
362 /* A relative 26 bit branch; the lower two bits must be zero. */
363 HOWTO (R_PPC64_REL24, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 26, /* bitsize */
367 TRUE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_signed, /* complain_on_overflow */
370 ppc64_elf_branch_reloc, /* special_function */
371 "R_PPC64_REL24", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0x03fffffc, /* dst_mask */
375 TRUE), /* pcrel_offset */
376
377 /* A relative 16 bit branch; the lower two bits must be zero. */
378 HOWTO (R_PPC64_REL14, /* type */
379 0, /* rightshift */
380 2, /* size (0 = byte, 1 = short, 2 = long) */
381 16, /* bitsize */
382 TRUE, /* pc_relative */
383 0, /* bitpos */
384 complain_overflow_signed, /* complain_on_overflow */
385 ppc64_elf_branch_reloc, /* special_function */
386 "R_PPC64_REL14", /* name */
387 FALSE, /* partial_inplace */
388 0, /* src_mask */
389 0x0000fffc, /* dst_mask */
390 TRUE), /* pcrel_offset */
391
392 /* A relative 16 bit branch. Bit 10 should be set to indicate that
393 the branch is expected to be taken. The lower two bits must be
394 zero. */
395 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
396 0, /* rightshift */
397 2, /* size (0 = byte, 1 = short, 2 = long) */
398 16, /* bitsize */
399 TRUE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_signed, /* complain_on_overflow */
402 ppc64_elf_brtaken_reloc, /* special_function */
403 "R_PPC64_REL14_BRTAKEN", /* name */
404 FALSE, /* partial_inplace */
405 0, /* src_mask */
406 0x0000fffc, /* dst_mask */
407 TRUE), /* pcrel_offset */
408
409 /* A relative 16 bit branch. Bit 10 should be set to indicate that
410 the branch is not expected to be taken. The lower two bits must
411 be zero. */
412 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
413 0, /* rightshift */
414 2, /* size (0 = byte, 1 = short, 2 = long) */
415 16, /* bitsize */
416 TRUE, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_signed, /* complain_on_overflow */
419 ppc64_elf_brtaken_reloc, /* special_function */
420 "R_PPC64_REL14_BRNTAKEN",/* name */
421 FALSE, /* partial_inplace */
422 0, /* src_mask */
423 0x0000fffc, /* dst_mask */
424 TRUE), /* pcrel_offset */
425
426 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
427 symbol. */
428 HOWTO (R_PPC64_GOT16, /* type */
429 0, /* rightshift */
430 1, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 FALSE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_signed, /* complain_on_overflow */
435 ppc64_elf_unhandled_reloc, /* special_function */
436 "R_PPC64_GOT16", /* name */
437 FALSE, /* partial_inplace */
438 0, /* src_mask */
439 0xffff, /* dst_mask */
440 FALSE), /* pcrel_offset */
441
442 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
443 the symbol. */
444 HOWTO (R_PPC64_GOT16_LO, /* type */
445 0, /* rightshift */
446 1, /* size (0 = byte, 1 = short, 2 = long) */
447 16, /* bitsize */
448 FALSE, /* pc_relative */
449 0, /* bitpos */
450 complain_overflow_dont, /* complain_on_overflow */
451 ppc64_elf_unhandled_reloc, /* special_function */
452 "R_PPC64_GOT16_LO", /* name */
453 FALSE, /* partial_inplace */
454 0, /* src_mask */
455 0xffff, /* dst_mask */
456 FALSE), /* pcrel_offset */
457
458 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
459 the symbol. */
460 HOWTO (R_PPC64_GOT16_HI, /* type */
461 16, /* rightshift */
462 1, /* size (0 = byte, 1 = short, 2 = long) */
463 16, /* bitsize */
464 FALSE, /* pc_relative */
465 0, /* bitpos */
466 complain_overflow_dont,/* complain_on_overflow */
467 ppc64_elf_unhandled_reloc, /* special_function */
468 "R_PPC64_GOT16_HI", /* name */
469 FALSE, /* partial_inplace */
470 0, /* src_mask */
471 0xffff, /* dst_mask */
472 FALSE), /* pcrel_offset */
473
474 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
475 the symbol. */
476 HOWTO (R_PPC64_GOT16_HA, /* type */
477 16, /* rightshift */
478 1, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_dont,/* complain_on_overflow */
483 ppc64_elf_unhandled_reloc, /* special_function */
484 "R_PPC64_GOT16_HA", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xffff, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* This is used only by the dynamic linker. The symbol should exist
491 both in the object being run and in some shared library. The
492 dynamic linker copies the data addressed by the symbol from the
493 shared library into the object, because the object being
494 run has to have the data at some particular address. */
495 HOWTO (R_PPC64_COPY, /* type */
496 0, /* rightshift */
497 0, /* this one is variable size */
498 0, /* bitsize */
499 FALSE, /* pc_relative */
500 0, /* bitpos */
501 complain_overflow_dont, /* complain_on_overflow */
502 ppc64_elf_unhandled_reloc, /* special_function */
503 "R_PPC64_COPY", /* name */
504 FALSE, /* partial_inplace */
505 0, /* src_mask */
506 0, /* dst_mask */
507 FALSE), /* pcrel_offset */
508
509 /* Like R_PPC64_ADDR64, but used when setting global offset table
510 entries. */
511 HOWTO (R_PPC64_GLOB_DAT, /* type */
512 0, /* rightshift */
513 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
514 64, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont, /* complain_on_overflow */
518 ppc64_elf_unhandled_reloc, /* special_function */
519 "R_PPC64_GLOB_DAT", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 ONES (64), /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Created by the link editor. Marks a procedure linkage table
526 entry for a symbol. */
527 HOWTO (R_PPC64_JMP_SLOT, /* type */
528 0, /* rightshift */
529 0, /* size (0 = byte, 1 = short, 2 = long) */
530 0, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 ppc64_elf_unhandled_reloc, /* special_function */
535 "R_PPC64_JMP_SLOT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 0, /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Used only by the dynamic linker. When the object is run, this
542 doubleword64 is set to the load address of the object, plus the
543 addend. */
544 HOWTO (R_PPC64_RELATIVE, /* type */
545 0, /* rightshift */
546 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
547 64, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_dont, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 "R_PPC64_RELATIVE", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 ONES (64), /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* Like R_PPC64_ADDR32, but may be unaligned. */
559 HOWTO (R_PPC64_UADDR32, /* type */
560 0, /* rightshift */
561 2, /* size (0 = byte, 1 = short, 2 = long) */
562 32, /* bitsize */
563 FALSE, /* pc_relative */
564 0, /* bitpos */
565 complain_overflow_bitfield, /* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_PPC64_UADDR32", /* name */
568 FALSE, /* partial_inplace */
569 0, /* src_mask */
570 0xffffffff, /* dst_mask */
571 FALSE), /* pcrel_offset */
572
573 /* Like R_PPC64_ADDR16, but may be unaligned. */
574 HOWTO (R_PPC64_UADDR16, /* type */
575 0, /* rightshift */
576 1, /* size (0 = byte, 1 = short, 2 = long) */
577 16, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_bitfield, /* complain_on_overflow */
581 bfd_elf_generic_reloc, /* special_function */
582 "R_PPC64_UADDR16", /* name */
583 FALSE, /* partial_inplace */
584 0, /* src_mask */
585 0xffff, /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* 32-bit PC relative. */
589 HOWTO (R_PPC64_REL32, /* type */
590 0, /* rightshift */
591 2, /* size (0 = byte, 1 = short, 2 = long) */
592 32, /* bitsize */
593 TRUE, /* pc_relative */
594 0, /* bitpos */
595 /* FIXME: Verify. Was complain_overflow_bitfield. */
596 complain_overflow_signed, /* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_PPC64_REL32", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffffffff, /* dst_mask */
602 TRUE), /* pcrel_offset */
603
604 /* 32-bit relocation to the symbol's procedure linkage table. */
605 HOWTO (R_PPC64_PLT32, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 32, /* bitsize */
609 FALSE, /* pc_relative */
610 0, /* bitpos */
611 complain_overflow_bitfield, /* complain_on_overflow */
612 ppc64_elf_unhandled_reloc, /* special_function */
613 "R_PPC64_PLT32", /* name */
614 FALSE, /* partial_inplace */
615 0, /* src_mask */
616 0xffffffff, /* dst_mask */
617 FALSE), /* pcrel_offset */
618
619 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
620 FIXME: R_PPC64_PLTREL32 not supported. */
621 HOWTO (R_PPC64_PLTREL32, /* type */
622 0, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 32, /* bitsize */
625 TRUE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_signed, /* complain_on_overflow */
628 bfd_elf_generic_reloc, /* special_function */
629 "R_PPC64_PLTREL32", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0xffffffff, /* dst_mask */
633 TRUE), /* pcrel_offset */
634
635 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
636 the symbol. */
637 HOWTO (R_PPC64_PLT16_LO, /* type */
638 0, /* rightshift */
639 1, /* size (0 = byte, 1 = short, 2 = long) */
640 16, /* bitsize */
641 FALSE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_dont, /* complain_on_overflow */
644 ppc64_elf_unhandled_reloc, /* special_function */
645 "R_PPC64_PLT16_LO", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffff, /* dst_mask */
649 FALSE), /* pcrel_offset */
650
651 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
652 the symbol. */
653 HOWTO (R_PPC64_PLT16_HI, /* type */
654 16, /* rightshift */
655 1, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 ppc64_elf_unhandled_reloc, /* special_function */
661 "R_PPC64_PLT16_HI", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0xffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
668 the symbol. */
669 HOWTO (R_PPC64_PLT16_HA, /* type */
670 16, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_dont, /* complain_on_overflow */
676 ppc64_elf_unhandled_reloc, /* special_function */
677 "R_PPC64_PLT16_HA", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* 16-bit section relative relocation. */
684 HOWTO (R_PPC64_SECTOFF, /* type */
685 0, /* rightshift */
686 1, /* size (0 = byte, 1 = short, 2 = long) */
687 16, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_bitfield, /* complain_on_overflow */
691 ppc64_elf_sectoff_reloc, /* special_function */
692 "R_PPC64_SECTOFF", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0xffff, /* dst_mask */
696 FALSE), /* pcrel_offset */
697
698 /* Like R_PPC64_SECTOFF, but no overflow warning. */
699 HOWTO (R_PPC64_SECTOFF_LO, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_sectoff_reloc, /* special_function */
707 "R_PPC64_SECTOFF_LO", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit upper half section relative relocation. */
714 HOWTO (R_PPC64_SECTOFF_HI, /* type */
715 16, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_dont, /* complain_on_overflow */
721 ppc64_elf_sectoff_reloc, /* special_function */
722 "R_PPC64_SECTOFF_HI", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit upper half adjusted section relative relocation. */
729 HOWTO (R_PPC64_SECTOFF_HA, /* type */
730 16, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc64_elf_sectoff_ha_reloc, /* special_function */
737 "R_PPC64_SECTOFF_HA", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* Like R_PPC64_REL24 without touching the two least significant bits. */
744 HOWTO (R_PPC64_REL30, /* type */
745 2, /* rightshift */
746 2, /* size (0 = byte, 1 = short, 2 = long) */
747 30, /* bitsize */
748 TRUE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC64_REL30", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xfffffffc, /* dst_mask */
756 TRUE), /* pcrel_offset */
757
758 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
759
760 /* A standard 64-bit relocation. */
761 HOWTO (R_PPC64_ADDR64, /* type */
762 0, /* rightshift */
763 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
764 64, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 bfd_elf_generic_reloc, /* special_function */
769 "R_PPC64_ADDR64", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 ONES (64), /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* The bits 32-47 of an address. */
776 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
777 32, /* rightshift */
778 1, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_dont, /* complain_on_overflow */
783 bfd_elf_generic_reloc, /* special_function */
784 "R_PPC64_ADDR16_HIGHER", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0xffff, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 /* The bits 32-47 of an address, plus 1 if the contents of the low
791 16 bits, treated as a signed number, is negative. */
792 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
793 32, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 ppc64_elf_ha_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHERA", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 48-63 of an address. */
807 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
808 48, /* rightshift */
809 1, /* size (0 = byte, 1 = short, 2 = long) */
810 16, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_PPC64_ADDR16_HIGHEST", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0xffff, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* The bits 48-63 of an address, plus 1 if the contents of the low
822 16 bits, treated as a signed number, is negative. */
823 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
824 48, /* rightshift */
825 1, /* size (0 = byte, 1 = short, 2 = long) */
826 16, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 ppc64_elf_ha_reloc, /* special_function */
831 "R_PPC64_ADDR16_HIGHESTA", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 0xffff, /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* Like ADDR64, but may be unaligned. */
838 HOWTO (R_PPC64_UADDR64, /* type */
839 0, /* rightshift */
840 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
841 64, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_UADDR64", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 ONES (64), /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* 64-bit relative relocation. */
853 HOWTO (R_PPC64_REL64, /* type */
854 0, /* rightshift */
855 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
856 64, /* bitsize */
857 TRUE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 "R_PPC64_REL64", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 ONES (64), /* dst_mask */
865 TRUE), /* pcrel_offset */
866
867 /* 64-bit relocation to the symbol's procedure linkage table. */
868 HOWTO (R_PPC64_PLT64, /* type */
869 0, /* rightshift */
870 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
871 64, /* bitsize */
872 FALSE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 ppc64_elf_unhandled_reloc, /* special_function */
876 "R_PPC64_PLT64", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 ONES (64), /* dst_mask */
880 FALSE), /* pcrel_offset */
881
882 /* 64-bit PC relative relocation to the symbol's procedure linkage
883 table. */
884 /* FIXME: R_PPC64_PLTREL64 not supported. */
885 HOWTO (R_PPC64_PLTREL64, /* type */
886 0, /* rightshift */
887 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
888 64, /* bitsize */
889 TRUE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc64_elf_unhandled_reloc, /* special_function */
893 "R_PPC64_PLTREL64", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 ONES (64), /* dst_mask */
897 TRUE), /* pcrel_offset */
898
899 /* 16 bit TOC-relative relocation. */
900
901 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
902 HOWTO (R_PPC64_TOC16, /* type */
903 0, /* rightshift */
904 1, /* size (0 = byte, 1 = short, 2 = long) */
905 16, /* bitsize */
906 FALSE, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_signed, /* complain_on_overflow */
909 ppc64_elf_toc_reloc, /* special_function */
910 "R_PPC64_TOC16", /* name */
911 FALSE, /* partial_inplace */
912 0, /* src_mask */
913 0xffff, /* dst_mask */
914 FALSE), /* pcrel_offset */
915
916 /* 16 bit TOC-relative relocation without overflow. */
917
918 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
919 HOWTO (R_PPC64_TOC16_LO, /* type */
920 0, /* rightshift */
921 1, /* size (0 = byte, 1 = short, 2 = long) */
922 16, /* bitsize */
923 FALSE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont, /* complain_on_overflow */
926 ppc64_elf_toc_reloc, /* special_function */
927 "R_PPC64_TOC16_LO", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 0xffff, /* dst_mask */
931 FALSE), /* pcrel_offset */
932
933 /* 16 bit TOC-relative relocation, high 16 bits. */
934
935 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
936 HOWTO (R_PPC64_TOC16_HI, /* type */
937 16, /* rightshift */
938 1, /* size (0 = byte, 1 = short, 2 = long) */
939 16, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_dont, /* complain_on_overflow */
943 ppc64_elf_toc_reloc, /* special_function */
944 "R_PPC64_TOC16_HI", /* name */
945 FALSE, /* partial_inplace */
946 0, /* src_mask */
947 0xffff, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
951 contents of the low 16 bits, treated as a signed number, is
952 negative. */
953
954 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
955 HOWTO (R_PPC64_TOC16_HA, /* type */
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 FALSE, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc64_elf_toc_ha_reloc, /* special_function */
963 "R_PPC64_TOC16_HA", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* 64-bit relocation; insert value of TOC base (.TOC.). */
970
971 /* R_PPC64_TOC 51 doubleword64 .TOC. */
972 HOWTO (R_PPC64_TOC, /* type */
973 0, /* rightshift */
974 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
975 64, /* bitsize */
976 FALSE, /* pc_relative */
977 0, /* bitpos */
978 complain_overflow_bitfield, /* complain_on_overflow */
979 ppc64_elf_toc64_reloc, /* special_function */
980 "R_PPC64_TOC", /* name */
981 FALSE, /* partial_inplace */
982 0, /* src_mask */
983 ONES (64), /* dst_mask */
984 FALSE), /* pcrel_offset */
985
986 /* Like R_PPC64_GOT16, but also informs the link editor that the
987 value to relocate may (!) refer to a PLT entry which the link
988 editor (a) may replace with the symbol value. If the link editor
989 is unable to fully resolve the symbol, it may (b) create a PLT
990 entry and store the address to the new PLT entry in the GOT.
991 This permits lazy resolution of function symbols at run time.
992 The link editor may also skip all of this and just (c) emit a
993 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
994 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
995 HOWTO (R_PPC64_PLTGOT16, /* type */
996 0, /* rightshift */
997 1, /* size (0 = byte, 1 = short, 2 = long) */
998 16, /* bitsize */
999 FALSE, /* pc_relative */
1000 0, /* bitpos */
1001 complain_overflow_signed, /* complain_on_overflow */
1002 ppc64_elf_unhandled_reloc, /* special_function */
1003 "R_PPC64_PLTGOT16", /* name */
1004 FALSE, /* partial_inplace */
1005 0, /* src_mask */
1006 0xffff, /* dst_mask */
1007 FALSE), /* pcrel_offset */
1008
1009 /* Like R_PPC64_PLTGOT16, but without overflow. */
1010 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1011 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1012 0, /* rightshift */
1013 1, /* size (0 = byte, 1 = short, 2 = long) */
1014 16, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_dont, /* complain_on_overflow */
1018 ppc64_elf_unhandled_reloc, /* special_function */
1019 "R_PPC64_PLTGOT16_LO", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 0xffff, /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1026 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1027 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc64_elf_unhandled_reloc, /* special_function */
1035 "R_PPC64_PLTGOT16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1042 1 if the contents of the low 16 bits, treated as a signed number,
1043 is negative. */
1044 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1045 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1046 16, /* rightshift */
1047 1, /* size (0 = byte, 1 = short, 2 = long) */
1048 16, /* bitsize */
1049 FALSE, /* pc_relative */
1050 0, /* bitpos */
1051 complain_overflow_dont,/* complain_on_overflow */
1052 ppc64_elf_unhandled_reloc, /* special_function */
1053 "R_PPC64_PLTGOT16_HA", /* name */
1054 FALSE, /* partial_inplace */
1055 0, /* src_mask */
1056 0xffff, /* dst_mask */
1057 FALSE), /* pcrel_offset */
1058
1059 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1060 HOWTO (R_PPC64_ADDR16_DS, /* type */
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_bitfield, /* complain_on_overflow */
1067 bfd_elf_generic_reloc, /* special_function */
1068 "R_PPC64_ADDR16_DS", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xfffc, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1075 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_dont,/* complain_on_overflow */
1082 bfd_elf_generic_reloc, /* special_function */
1083 "R_PPC64_ADDR16_LO_DS",/* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xfffc, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1090 HOWTO (R_PPC64_GOT16_DS, /* type */
1091 0, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_signed, /* complain_on_overflow */
1097 ppc64_elf_unhandled_reloc, /* special_function */
1098 "R_PPC64_GOT16_DS", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xfffc, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1105 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1106 0, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc64_elf_unhandled_reloc, /* special_function */
1113 "R_PPC64_GOT16_LO_DS", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xfffc, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1120 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_dont, /* complain_on_overflow */
1127 ppc64_elf_unhandled_reloc, /* special_function */
1128 "R_PPC64_PLT16_LO_DS", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xfffc, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1135 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_bitfield, /* complain_on_overflow */
1142 ppc64_elf_sectoff_reloc, /* special_function */
1143 "R_PPC64_SECTOFF_DS", /* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xfffc, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1150 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1151 0, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_dont, /* complain_on_overflow */
1157 ppc64_elf_sectoff_reloc, /* special_function */
1158 "R_PPC64_SECTOFF_LO_DS",/* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xfffc, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1165 HOWTO (R_PPC64_TOC16_DS, /* type */
1166 0, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_signed, /* complain_on_overflow */
1172 ppc64_elf_toc_reloc, /* special_function */
1173 "R_PPC64_TOC16_DS", /* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xfffc, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1180 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1181 0, /* rightshift */
1182 1, /* size (0 = byte, 1 = short, 2 = long) */
1183 16, /* bitsize */
1184 FALSE, /* pc_relative */
1185 0, /* bitpos */
1186 complain_overflow_dont, /* complain_on_overflow */
1187 ppc64_elf_toc_reloc, /* special_function */
1188 "R_PPC64_TOC16_LO_DS", /* name */
1189 FALSE, /* partial_inplace */
1190 0, /* src_mask */
1191 0xfffc, /* dst_mask */
1192 FALSE), /* pcrel_offset */
1193
1194 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1195 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1196 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1197 0, /* rightshift */
1198 1, /* size (0 = byte, 1 = short, 2 = long) */
1199 16, /* bitsize */
1200 FALSE, /* pc_relative */
1201 0, /* bitpos */
1202 complain_overflow_signed, /* complain_on_overflow */
1203 ppc64_elf_unhandled_reloc, /* special_function */
1204 "R_PPC64_PLTGOT16_DS", /* name */
1205 FALSE, /* partial_inplace */
1206 0, /* src_mask */
1207 0xfffc, /* dst_mask */
1208 FALSE), /* pcrel_offset */
1209
1210 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1211 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1212 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 ppc64_elf_unhandled_reloc, /* special_function */
1220 "R_PPC64_PLTGOT16_LO_DS",/* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Marker reloc for TLS. */
1227 HOWTO (R_PPC64_TLS,
1228 0, /* rightshift */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1230 32, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC64_TLS", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* Computes the load module index of the load module that contains the
1242 definition of its TLS sym. */
1243 HOWTO (R_PPC64_DTPMOD64,
1244 0, /* rightshift */
1245 4, /* size (0 = byte, 1 = short, 2 = long) */
1246 64, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_dont, /* complain_on_overflow */
1250 ppc64_elf_unhandled_reloc, /* special_function */
1251 "R_PPC64_DTPMOD64", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 ONES (64), /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 /* Computes a dtv-relative displacement, the difference between the value
1258 of sym+add and the base address of the thread-local storage block that
1259 contains the definition of sym, minus 0x8000. */
1260 HOWTO (R_PPC64_DTPREL64,
1261 0, /* rightshift */
1262 4, /* size (0 = byte, 1 = short, 2 = long) */
1263 64, /* bitsize */
1264 FALSE, /* pc_relative */
1265 0, /* bitpos */
1266 complain_overflow_dont, /* complain_on_overflow */
1267 ppc64_elf_unhandled_reloc, /* special_function */
1268 "R_PPC64_DTPREL64", /* name */
1269 FALSE, /* partial_inplace */
1270 0, /* src_mask */
1271 ONES (64), /* dst_mask */
1272 FALSE), /* pcrel_offset */
1273
1274 /* A 16 bit dtprel reloc. */
1275 HOWTO (R_PPC64_DTPREL16,
1276 0, /* rightshift */
1277 1, /* size (0 = byte, 1 = short, 2 = long) */
1278 16, /* bitsize */
1279 FALSE, /* pc_relative */
1280 0, /* bitpos */
1281 complain_overflow_signed, /* complain_on_overflow */
1282 ppc64_elf_unhandled_reloc, /* special_function */
1283 "R_PPC64_DTPREL16", /* name */
1284 FALSE, /* partial_inplace */
1285 0, /* src_mask */
1286 0xffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1288
1289 /* Like DTPREL16, but no overflow. */
1290 HOWTO (R_PPC64_DTPREL16_LO,
1291 0, /* rightshift */
1292 1, /* size (0 = byte, 1 = short, 2 = long) */
1293 16, /* bitsize */
1294 FALSE, /* pc_relative */
1295 0, /* bitpos */
1296 complain_overflow_dont, /* complain_on_overflow */
1297 ppc64_elf_unhandled_reloc, /* special_function */
1298 "R_PPC64_DTPREL16_LO", /* name */
1299 FALSE, /* partial_inplace */
1300 0, /* src_mask */
1301 0xffff, /* dst_mask */
1302 FALSE), /* pcrel_offset */
1303
1304 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1305 HOWTO (R_PPC64_DTPREL16_HI,
1306 16, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_dont, /* complain_on_overflow */
1312 ppc64_elf_unhandled_reloc, /* special_function */
1313 "R_PPC64_DTPREL16_HI", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1320 HOWTO (R_PPC64_DTPREL16_HA,
1321 16, /* rightshift */
1322 1, /* size (0 = byte, 1 = short, 2 = long) */
1323 16, /* bitsize */
1324 FALSE, /* pc_relative */
1325 0, /* bitpos */
1326 complain_overflow_dont, /* complain_on_overflow */
1327 ppc64_elf_unhandled_reloc, /* special_function */
1328 "R_PPC64_DTPREL16_HA", /* name */
1329 FALSE, /* partial_inplace */
1330 0, /* src_mask */
1331 0xffff, /* dst_mask */
1332 FALSE), /* pcrel_offset */
1333
1334 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1335 HOWTO (R_PPC64_DTPREL16_HIGHER,
1336 32, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 ppc64_elf_unhandled_reloc, /* special_function */
1343 "R_PPC64_DTPREL16_HIGHER", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1350 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1351 32, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_dont, /* complain_on_overflow */
1357 ppc64_elf_unhandled_reloc, /* special_function */
1358 "R_PPC64_DTPREL16_HIGHERA", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1365 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1366 48, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont, /* complain_on_overflow */
1372 ppc64_elf_unhandled_reloc, /* special_function */
1373 "R_PPC64_DTPREL16_HIGHEST", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1380 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1381 48, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 FALSE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 ppc64_elf_unhandled_reloc, /* special_function */
1388 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 FALSE), /* pcrel_offset */
1393
1394 /* Like DTPREL16, but for insns with a DS field. */
1395 HOWTO (R_PPC64_DTPREL16_DS,
1396 0, /* rightshift */
1397 1, /* size (0 = byte, 1 = short, 2 = long) */
1398 16, /* bitsize */
1399 FALSE, /* pc_relative */
1400 0, /* bitpos */
1401 complain_overflow_signed, /* complain_on_overflow */
1402 ppc64_elf_unhandled_reloc, /* special_function */
1403 "R_PPC64_DTPREL16_DS", /* name */
1404 FALSE, /* partial_inplace */
1405 0, /* src_mask */
1406 0xfffc, /* dst_mask */
1407 FALSE), /* pcrel_offset */
1408
1409 /* Like DTPREL16_DS, but no overflow. */
1410 HOWTO (R_PPC64_DTPREL16_LO_DS,
1411 0, /* rightshift */
1412 1, /* size (0 = byte, 1 = short, 2 = long) */
1413 16, /* bitsize */
1414 FALSE, /* pc_relative */
1415 0, /* bitpos */
1416 complain_overflow_dont, /* complain_on_overflow */
1417 ppc64_elf_unhandled_reloc, /* special_function */
1418 "R_PPC64_DTPREL16_LO_DS", /* name */
1419 FALSE, /* partial_inplace */
1420 0, /* src_mask */
1421 0xfffc, /* dst_mask */
1422 FALSE), /* pcrel_offset */
1423
1424 /* Computes a tp-relative displacement, the difference between the value of
1425 sym+add and the value of the thread pointer (r13). */
1426 HOWTO (R_PPC64_TPREL64,
1427 0, /* rightshift */
1428 4, /* size (0 = byte, 1 = short, 2 = long) */
1429 64, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 ppc64_elf_unhandled_reloc, /* special_function */
1434 "R_PPC64_TPREL64", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 ONES (64), /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* A 16 bit tprel reloc. */
1441 HOWTO (R_PPC64_TPREL16,
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 ppc64_elf_unhandled_reloc, /* special_function */
1449 "R_PPC64_TPREL16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454
1455 /* Like TPREL16, but no overflow. */
1456 HOWTO (R_PPC64_TPREL16_LO,
1457 0, /* rightshift */
1458 1, /* size (0 = byte, 1 = short, 2 = long) */
1459 16, /* bitsize */
1460 FALSE, /* pc_relative */
1461 0, /* bitpos */
1462 complain_overflow_dont, /* complain_on_overflow */
1463 ppc64_elf_unhandled_reloc, /* special_function */
1464 "R_PPC64_TPREL16_LO", /* name */
1465 FALSE, /* partial_inplace */
1466 0, /* src_mask */
1467 0xffff, /* dst_mask */
1468 FALSE), /* pcrel_offset */
1469
1470 /* Like TPREL16_LO, but next higher group of 16 bits. */
1471 HOWTO (R_PPC64_TPREL16_HI,
1472 16, /* rightshift */
1473 1, /* size (0 = byte, 1 = short, 2 = long) */
1474 16, /* bitsize */
1475 FALSE, /* pc_relative */
1476 0, /* bitpos */
1477 complain_overflow_dont, /* complain_on_overflow */
1478 ppc64_elf_unhandled_reloc, /* special_function */
1479 "R_PPC64_TPREL16_HI", /* name */
1480 FALSE, /* partial_inplace */
1481 0, /* src_mask */
1482 0xffff, /* dst_mask */
1483 FALSE), /* pcrel_offset */
1484
1485 /* Like TPREL16_HI, but adjust for low 16 bits. */
1486 HOWTO (R_PPC64_TPREL16_HA,
1487 16, /* rightshift */
1488 1, /* size (0 = byte, 1 = short, 2 = long) */
1489 16, /* bitsize */
1490 FALSE, /* pc_relative */
1491 0, /* bitpos */
1492 complain_overflow_dont, /* complain_on_overflow */
1493 ppc64_elf_unhandled_reloc, /* special_function */
1494 "R_PPC64_TPREL16_HA", /* name */
1495 FALSE, /* partial_inplace */
1496 0, /* src_mask */
1497 0xffff, /* dst_mask */
1498 FALSE), /* pcrel_offset */
1499
1500 /* Like TPREL16_HI, but next higher group of 16 bits. */
1501 HOWTO (R_PPC64_TPREL16_HIGHER,
1502 32, /* rightshift */
1503 1, /* size (0 = byte, 1 = short, 2 = long) */
1504 16, /* bitsize */
1505 FALSE, /* pc_relative */
1506 0, /* bitpos */
1507 complain_overflow_dont, /* complain_on_overflow */
1508 ppc64_elf_unhandled_reloc, /* special_function */
1509 "R_PPC64_TPREL16_HIGHER", /* name */
1510 FALSE, /* partial_inplace */
1511 0, /* src_mask */
1512 0xffff, /* dst_mask */
1513 FALSE), /* pcrel_offset */
1514
1515 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1516 HOWTO (R_PPC64_TPREL16_HIGHERA,
1517 32, /* rightshift */
1518 1, /* size (0 = byte, 1 = short, 2 = long) */
1519 16, /* bitsize */
1520 FALSE, /* pc_relative */
1521 0, /* bitpos */
1522 complain_overflow_dont, /* complain_on_overflow */
1523 ppc64_elf_unhandled_reloc, /* special_function */
1524 "R_PPC64_TPREL16_HIGHERA", /* name */
1525 FALSE, /* partial_inplace */
1526 0, /* src_mask */
1527 0xffff, /* dst_mask */
1528 FALSE), /* pcrel_offset */
1529
1530 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1531 HOWTO (R_PPC64_TPREL16_HIGHEST,
1532 48, /* rightshift */
1533 1, /* size (0 = byte, 1 = short, 2 = long) */
1534 16, /* bitsize */
1535 FALSE, /* pc_relative */
1536 0, /* bitpos */
1537 complain_overflow_dont, /* complain_on_overflow */
1538 ppc64_elf_unhandled_reloc, /* special_function */
1539 "R_PPC64_TPREL16_HIGHEST", /* name */
1540 FALSE, /* partial_inplace */
1541 0, /* src_mask */
1542 0xffff, /* dst_mask */
1543 FALSE), /* pcrel_offset */
1544
1545 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1546 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1547 48, /* rightshift */
1548 1, /* size (0 = byte, 1 = short, 2 = long) */
1549 16, /* bitsize */
1550 FALSE, /* pc_relative */
1551 0, /* bitpos */
1552 complain_overflow_dont, /* complain_on_overflow */
1553 ppc64_elf_unhandled_reloc, /* special_function */
1554 "R_PPC64_TPREL16_HIGHESTA", /* name */
1555 FALSE, /* partial_inplace */
1556 0, /* src_mask */
1557 0xffff, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1559
1560 /* Like TPREL16, but for insns with a DS field. */
1561 HOWTO (R_PPC64_TPREL16_DS,
1562 0, /* rightshift */
1563 1, /* size (0 = byte, 1 = short, 2 = long) */
1564 16, /* bitsize */
1565 FALSE, /* pc_relative */
1566 0, /* bitpos */
1567 complain_overflow_signed, /* complain_on_overflow */
1568 ppc64_elf_unhandled_reloc, /* special_function */
1569 "R_PPC64_TPREL16_DS", /* name */
1570 FALSE, /* partial_inplace */
1571 0, /* src_mask */
1572 0xfffc, /* dst_mask */
1573 FALSE), /* pcrel_offset */
1574
1575 /* Like TPREL16_DS, but no overflow. */
1576 HOWTO (R_PPC64_TPREL16_LO_DS,
1577 0, /* rightshift */
1578 1, /* size (0 = byte, 1 = short, 2 = long) */
1579 16, /* bitsize */
1580 FALSE, /* pc_relative */
1581 0, /* bitpos */
1582 complain_overflow_dont, /* complain_on_overflow */
1583 ppc64_elf_unhandled_reloc, /* special_function */
1584 "R_PPC64_TPREL16_LO_DS", /* name */
1585 FALSE, /* partial_inplace */
1586 0, /* src_mask */
1587 0xfffc, /* dst_mask */
1588 FALSE), /* pcrel_offset */
1589
1590 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1591 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1592 to the first entry relative to the TOC base (r2). */
1593 HOWTO (R_PPC64_GOT_TLSGD16,
1594 0, /* rightshift */
1595 1, /* size (0 = byte, 1 = short, 2 = long) */
1596 16, /* bitsize */
1597 FALSE, /* pc_relative */
1598 0, /* bitpos */
1599 complain_overflow_signed, /* complain_on_overflow */
1600 ppc64_elf_unhandled_reloc, /* special_function */
1601 "R_PPC64_GOT_TLSGD16", /* name */
1602 FALSE, /* partial_inplace */
1603 0, /* src_mask */
1604 0xffff, /* dst_mask */
1605 FALSE), /* pcrel_offset */
1606
1607 /* Like GOT_TLSGD16, but no overflow. */
1608 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1609 0, /* rightshift */
1610 1, /* size (0 = byte, 1 = short, 2 = long) */
1611 16, /* bitsize */
1612 FALSE, /* pc_relative */
1613 0, /* bitpos */
1614 complain_overflow_dont, /* complain_on_overflow */
1615 ppc64_elf_unhandled_reloc, /* special_function */
1616 "R_PPC64_GOT_TLSGD16_LO", /* name */
1617 FALSE, /* partial_inplace */
1618 0, /* src_mask */
1619 0xffff, /* dst_mask */
1620 FALSE), /* pcrel_offset */
1621
1622 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1623 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1624 16, /* rightshift */
1625 1, /* size (0 = byte, 1 = short, 2 = long) */
1626 16, /* bitsize */
1627 FALSE, /* pc_relative */
1628 0, /* bitpos */
1629 complain_overflow_dont, /* complain_on_overflow */
1630 ppc64_elf_unhandled_reloc, /* special_function */
1631 "R_PPC64_GOT_TLSGD16_HI", /* name */
1632 FALSE, /* partial_inplace */
1633 0, /* src_mask */
1634 0xffff, /* dst_mask */
1635 FALSE), /* pcrel_offset */
1636
1637 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1638 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1639 16, /* rightshift */
1640 1, /* size (0 = byte, 1 = short, 2 = long) */
1641 16, /* bitsize */
1642 FALSE, /* pc_relative */
1643 0, /* bitpos */
1644 complain_overflow_dont, /* complain_on_overflow */
1645 ppc64_elf_unhandled_reloc, /* special_function */
1646 "R_PPC64_GOT_TLSGD16_HA", /* name */
1647 FALSE, /* partial_inplace */
1648 0, /* src_mask */
1649 0xffff, /* dst_mask */
1650 FALSE), /* pcrel_offset */
1651
1652 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1653 with values (sym+add)@dtpmod and zero, and computes the offset to the
1654 first entry relative to the TOC base (r2). */
1655 HOWTO (R_PPC64_GOT_TLSLD16,
1656 0, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_signed, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_GOT_TLSLD16", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like GOT_TLSLD16, but no overflow. */
1670 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1671 0, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_dont, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_GOT_TLSLD16_LO", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xffff, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1685 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1686 16, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_GOT_TLSLD16_HI", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xffff, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1700 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1701 16, /* rightshift */
1702 1, /* size (0 = byte, 1 = short, 2 = long) */
1703 16, /* bitsize */
1704 FALSE, /* pc_relative */
1705 0, /* bitpos */
1706 complain_overflow_dont, /* complain_on_overflow */
1707 ppc64_elf_unhandled_reloc, /* special_function */
1708 "R_PPC64_GOT_TLSLD16_HA", /* name */
1709 FALSE, /* partial_inplace */
1710 0, /* src_mask */
1711 0xffff, /* dst_mask */
1712 FALSE), /* pcrel_offset */
1713
1714 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1715 the offset to the entry relative to the TOC base (r2). */
1716 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1717 0, /* rightshift */
1718 1, /* size (0 = byte, 1 = short, 2 = long) */
1719 16, /* bitsize */
1720 FALSE, /* pc_relative */
1721 0, /* bitpos */
1722 complain_overflow_signed, /* complain_on_overflow */
1723 ppc64_elf_unhandled_reloc, /* special_function */
1724 "R_PPC64_GOT_DTPREL16_DS", /* name */
1725 FALSE, /* partial_inplace */
1726 0, /* src_mask */
1727 0xfffc, /* dst_mask */
1728 FALSE), /* pcrel_offset */
1729
1730 /* Like GOT_DTPREL16_DS, but no overflow. */
1731 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1732 0, /* rightshift */
1733 1, /* size (0 = byte, 1 = short, 2 = long) */
1734 16, /* bitsize */
1735 FALSE, /* pc_relative */
1736 0, /* bitpos */
1737 complain_overflow_dont, /* complain_on_overflow */
1738 ppc64_elf_unhandled_reloc, /* special_function */
1739 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1740 FALSE, /* partial_inplace */
1741 0, /* src_mask */
1742 0xfffc, /* dst_mask */
1743 FALSE), /* pcrel_offset */
1744
1745 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1746 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1747 16, /* rightshift */
1748 1, /* size (0 = byte, 1 = short, 2 = long) */
1749 16, /* bitsize */
1750 FALSE, /* pc_relative */
1751 0, /* bitpos */
1752 complain_overflow_dont, /* complain_on_overflow */
1753 ppc64_elf_unhandled_reloc, /* special_function */
1754 "R_PPC64_GOT_DTPREL16_HI", /* name */
1755 FALSE, /* partial_inplace */
1756 0, /* src_mask */
1757 0xffff, /* dst_mask */
1758 FALSE), /* pcrel_offset */
1759
1760 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1761 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1762 16, /* rightshift */
1763 1, /* size (0 = byte, 1 = short, 2 = long) */
1764 16, /* bitsize */
1765 FALSE, /* pc_relative */
1766 0, /* bitpos */
1767 complain_overflow_dont, /* complain_on_overflow */
1768 ppc64_elf_unhandled_reloc, /* special_function */
1769 "R_PPC64_GOT_DTPREL16_HA", /* name */
1770 FALSE, /* partial_inplace */
1771 0, /* src_mask */
1772 0xffff, /* dst_mask */
1773 FALSE), /* pcrel_offset */
1774
1775 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1776 offset to the entry relative to the TOC base (r2). */
1777 HOWTO (R_PPC64_GOT_TPREL16_DS,
1778 0, /* rightshift */
1779 1, /* size (0 = byte, 1 = short, 2 = long) */
1780 16, /* bitsize */
1781 FALSE, /* pc_relative */
1782 0, /* bitpos */
1783 complain_overflow_signed, /* complain_on_overflow */
1784 ppc64_elf_unhandled_reloc, /* special_function */
1785 "R_PPC64_GOT_TPREL16_DS", /* name */
1786 FALSE, /* partial_inplace */
1787 0, /* src_mask */
1788 0xfffc, /* dst_mask */
1789 FALSE), /* pcrel_offset */
1790
1791 /* Like GOT_TPREL16_DS, but no overflow. */
1792 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1793 0, /* rightshift */
1794 1, /* size (0 = byte, 1 = short, 2 = long) */
1795 16, /* bitsize */
1796 FALSE, /* pc_relative */
1797 0, /* bitpos */
1798 complain_overflow_dont, /* complain_on_overflow */
1799 ppc64_elf_unhandled_reloc, /* special_function */
1800 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1801 FALSE, /* partial_inplace */
1802 0, /* src_mask */
1803 0xfffc, /* dst_mask */
1804 FALSE), /* pcrel_offset */
1805
1806 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1807 HOWTO (R_PPC64_GOT_TPREL16_HI,
1808 16, /* rightshift */
1809 1, /* size (0 = byte, 1 = short, 2 = long) */
1810 16, /* bitsize */
1811 FALSE, /* pc_relative */
1812 0, /* bitpos */
1813 complain_overflow_dont, /* complain_on_overflow */
1814 ppc64_elf_unhandled_reloc, /* special_function */
1815 "R_PPC64_GOT_TPREL16_HI", /* name */
1816 FALSE, /* partial_inplace */
1817 0, /* src_mask */
1818 0xffff, /* dst_mask */
1819 FALSE), /* pcrel_offset */
1820
1821 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1822 HOWTO (R_PPC64_GOT_TPREL16_HA,
1823 16, /* rightshift */
1824 1, /* size (0 = byte, 1 = short, 2 = long) */
1825 16, /* bitsize */
1826 FALSE, /* pc_relative */
1827 0, /* bitpos */
1828 complain_overflow_dont, /* complain_on_overflow */
1829 ppc64_elf_unhandled_reloc, /* special_function */
1830 "R_PPC64_GOT_TPREL16_HA", /* name */
1831 FALSE, /* partial_inplace */
1832 0, /* src_mask */
1833 0xffff, /* dst_mask */
1834 FALSE), /* pcrel_offset */
1835
1836 /* GNU extension to record C++ vtable hierarchy. */
1837 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1838 0, /* rightshift */
1839 0, /* size (0 = byte, 1 = short, 2 = long) */
1840 0, /* bitsize */
1841 FALSE, /* pc_relative */
1842 0, /* bitpos */
1843 complain_overflow_dont, /* complain_on_overflow */
1844 NULL, /* special_function */
1845 "R_PPC64_GNU_VTINHERIT", /* name */
1846 FALSE, /* partial_inplace */
1847 0, /* src_mask */
1848 0, /* dst_mask */
1849 FALSE), /* pcrel_offset */
1850
1851 /* GNU extension to record C++ vtable member usage. */
1852 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1853 0, /* rightshift */
1854 0, /* size (0 = byte, 1 = short, 2 = long) */
1855 0, /* bitsize */
1856 FALSE, /* pc_relative */
1857 0, /* bitpos */
1858 complain_overflow_dont, /* complain_on_overflow */
1859 NULL, /* special_function */
1860 "R_PPC64_GNU_VTENTRY", /* name */
1861 FALSE, /* partial_inplace */
1862 0, /* src_mask */
1863 0, /* dst_mask */
1864 FALSE), /* pcrel_offset */
1865 };
1866
1867 \f
1868 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1869 be done. */
1870
1871 static void
1872 ppc_howto_init (void)
1873 {
1874 unsigned int i, type;
1875
1876 for (i = 0;
1877 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1878 i++)
1879 {
1880 type = ppc64_elf_howto_raw[i].type;
1881 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1882 / sizeof (ppc64_elf_howto_table[0])));
1883 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1884 }
1885 }
1886
1887 static reloc_howto_type *
1888 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1889 bfd_reloc_code_real_type code)
1890 {
1891 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1892
1893 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1894 /* Initialize howto table if needed. */
1895 ppc_howto_init ();
1896
1897 switch (code)
1898 {
1899 default:
1900 return NULL;
1901
1902 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1903 break;
1904 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1905 break;
1906 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1907 break;
1908 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1909 break;
1910 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1911 break;
1912 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1913 break;
1914 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1915 break;
1916 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1917 break;
1918 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1919 break;
1920 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1921 break;
1922 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1923 break;
1924 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1925 break;
1926 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1927 break;
1928 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1929 break;
1930 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1931 break;
1932 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1933 break;
1934 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1935 break;
1936 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1937 break;
1938 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1939 break;
1940 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1941 break;
1942 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1943 break;
1944 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1945 break;
1946 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1947 break;
1948 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1949 break;
1950 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1951 break;
1952 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1953 break;
1954 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1955 break;
1956 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1957 break;
1958 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1959 break;
1960 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1961 break;
1962 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1963 break;
1964 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1965 break;
1966 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1967 break;
1968 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1969 break;
1970 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1971 break;
1972 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1973 break;
1974 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1975 break;
1976 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1977 break;
1978 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1979 break;
1980 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1981 break;
1982 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1983 break;
1984 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1985 break;
1986 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1987 break;
1988 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1989 break;
1990 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1991 break;
1992 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1993 break;
1994 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1995 break;
1996 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1997 break;
1998 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1999 break;
2000 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2001 break;
2002 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2003 break;
2004 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2005 break;
2006 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2007 break;
2008 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2009 break;
2010 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2011 break;
2012 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2013 break;
2014 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2015 break;
2016 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2017 break;
2018 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2019 break;
2020 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2021 break;
2022 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2023 break;
2024 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2025 break;
2026 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2027 break;
2028 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2029 break;
2030 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2031 break;
2032 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2033 break;
2034 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2035 break;
2036 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2037 break;
2038 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2039 break;
2040 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2041 break;
2042 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2043 break;
2044 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2045 break;
2046 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2047 break;
2048 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2049 break;
2050 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2051 break;
2052 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2053 break;
2054 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2067 break;
2068 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2069 break;
2070 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2071 break;
2072 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2073 break;
2074 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2075 break;
2076 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2077 break;
2078 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2079 break;
2080 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2081 break;
2082 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2083 break;
2084 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2085 break;
2086 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2087 break;
2088 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2089 break;
2090 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2091 break;
2092 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2093 break;
2094 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2095 break;
2096 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2097 break;
2098 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2099 break;
2100 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2101 break;
2102 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2103 break;
2104 }
2105
2106 return ppc64_elf_howto_table[r];
2107 };
2108
2109 /* Set the howto pointer for a PowerPC ELF reloc. */
2110
2111 static void
2112 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2113 Elf_Internal_Rela *dst)
2114 {
2115 unsigned int type;
2116
2117 /* Initialize howto table if needed. */
2118 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2119 ppc_howto_init ();
2120
2121 type = ELF64_R_TYPE (dst->r_info);
2122 if (type >= (sizeof (ppc64_elf_howto_table)
2123 / sizeof (ppc64_elf_howto_table[0])))
2124 {
2125 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2126 abfd, (int) type);
2127 type = R_PPC64_NONE;
2128 }
2129 cache_ptr->howto = ppc64_elf_howto_table[type];
2130 }
2131
2132 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2133
2134 static bfd_reloc_status_type
2135 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2136 void *data, asection *input_section,
2137 bfd *output_bfd, char **error_message)
2138 {
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 /* Adjust the addend for sign extension of the low 16 bits.
2147 We won't actually be using the low 16 bits, so trashing them
2148 doesn't matter. */
2149 reloc_entry->addend += 0x8000;
2150 return bfd_reloc_continue;
2151 }
2152
2153 static bfd_reloc_status_type
2154 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2155 void *data, asection *input_section,
2156 bfd *output_bfd, char **error_message)
2157 {
2158 if (output_bfd != NULL)
2159 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2160 input_section, output_bfd, error_message);
2161
2162 if (strcmp (symbol->section->name, ".opd") == 0
2163 && (symbol->section->owner->flags & DYNAMIC) == 0)
2164 {
2165 bfd_vma dest = opd_entry_value (symbol->section,
2166 symbol->value + reloc_entry->addend,
2167 NULL, NULL);
2168 if (dest != (bfd_vma) -1)
2169 reloc_entry->addend = dest - (symbol->value
2170 + symbol->section->output_section->vma
2171 + symbol->section->output_offset);
2172 }
2173 return bfd_reloc_continue;
2174 }
2175
2176 static bfd_reloc_status_type
2177 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2178 void *data, asection *input_section,
2179 bfd *output_bfd, char **error_message)
2180 {
2181 long insn;
2182 enum elf_ppc64_reloc_type r_type;
2183 bfd_size_type octets;
2184 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2185 bfd_boolean is_power4 = FALSE;
2186
2187 /* If this is a relocatable link (output_bfd test tells us), just
2188 call the generic function. Any adjustment will be done at final
2189 link time. */
2190 if (output_bfd != NULL)
2191 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2192 input_section, output_bfd, error_message);
2193
2194 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2195 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2196 insn &= ~(0x01 << 21);
2197 r_type = reloc_entry->howto->type;
2198 if (r_type == R_PPC64_ADDR14_BRTAKEN
2199 || r_type == R_PPC64_REL14_BRTAKEN)
2200 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2201
2202 if (is_power4)
2203 {
2204 /* Set 'a' bit. This is 0b00010 in BO field for branch
2205 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2206 for branch on CTR insns (BO == 1a00t or 1a01t). */
2207 if ((insn & (0x14 << 21)) == (0x04 << 21))
2208 insn |= 0x02 << 21;
2209 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2210 insn |= 0x08 << 21;
2211 else
2212 goto out;
2213 }
2214 else
2215 {
2216 bfd_vma target = 0;
2217 bfd_vma from;
2218
2219 if (!bfd_is_com_section (symbol->section))
2220 target = symbol->value;
2221 target += symbol->section->output_section->vma;
2222 target += symbol->section->output_offset;
2223 target += reloc_entry->addend;
2224
2225 from = (reloc_entry->address
2226 + input_section->output_offset
2227 + input_section->output_section->vma);
2228
2229 /* Invert 'y' bit if not the default. */
2230 if ((bfd_signed_vma) (target - from) < 0)
2231 insn ^= 0x01 << 21;
2232 }
2233 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2234 out:
2235 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2236 input_section, output_bfd, error_message);
2237 }
2238
2239 static bfd_reloc_status_type
2240 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2241 void *data, asection *input_section,
2242 bfd *output_bfd, char **error_message)
2243 {
2244 /* If this is a relocatable link (output_bfd test tells us), just
2245 call the generic function. Any adjustment will be done at final
2246 link time. */
2247 if (output_bfd != NULL)
2248 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2249 input_section, output_bfd, error_message);
2250
2251 /* Subtract the symbol section base address. */
2252 reloc_entry->addend -= symbol->section->output_section->vma;
2253 return bfd_reloc_continue;
2254 }
2255
2256 static bfd_reloc_status_type
2257 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2258 void *data, asection *input_section,
2259 bfd *output_bfd, char **error_message)
2260 {
2261 /* If this is a relocatable link (output_bfd test tells us), just
2262 call the generic function. Any adjustment will be done at final
2263 link time. */
2264 if (output_bfd != NULL)
2265 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2266 input_section, output_bfd, error_message);
2267
2268 /* Subtract the symbol section base address. */
2269 reloc_entry->addend -= symbol->section->output_section->vma;
2270
2271 /* Adjust the addend for sign extension of the low 16 bits. */
2272 reloc_entry->addend += 0x8000;
2273 return bfd_reloc_continue;
2274 }
2275
2276 static bfd_reloc_status_type
2277 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2278 void *data, asection *input_section,
2279 bfd *output_bfd, char **error_message)
2280 {
2281 bfd_vma TOCstart;
2282
2283 /* If this is a relocatable link (output_bfd test tells us), just
2284 call the generic function. Any adjustment will be done at final
2285 link time. */
2286 if (output_bfd != NULL)
2287 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2288 input_section, output_bfd, error_message);
2289
2290 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2291 if (TOCstart == 0)
2292 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2293
2294 /* Subtract the TOC base address. */
2295 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2296 return bfd_reloc_continue;
2297 }
2298
2299 static bfd_reloc_status_type
2300 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2301 void *data, asection *input_section,
2302 bfd *output_bfd, char **error_message)
2303 {
2304 bfd_vma TOCstart;
2305
2306 /* If this is a relocatable link (output_bfd test tells us), just
2307 call the generic function. Any adjustment will be done at final
2308 link time. */
2309 if (output_bfd != NULL)
2310 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2311 input_section, output_bfd, error_message);
2312
2313 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2314 if (TOCstart == 0)
2315 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2316
2317 /* Subtract the TOC base address. */
2318 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2319
2320 /* Adjust the addend for sign extension of the low 16 bits. */
2321 reloc_entry->addend += 0x8000;
2322 return bfd_reloc_continue;
2323 }
2324
2325 static bfd_reloc_status_type
2326 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2327 void *data, asection *input_section,
2328 bfd *output_bfd, char **error_message)
2329 {
2330 bfd_vma TOCstart;
2331 bfd_size_type octets;
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 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2345 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2346 return bfd_reloc_ok;
2347 }
2348
2349 static bfd_reloc_status_type
2350 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2351 void *data, asection *input_section,
2352 bfd *output_bfd, char **error_message)
2353 {
2354 /* If this is a relocatable link (output_bfd test tells us), just
2355 call the generic function. Any adjustment will be done at final
2356 link time. */
2357 if (output_bfd != NULL)
2358 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2359 input_section, output_bfd, error_message);
2360
2361 if (error_message != NULL)
2362 {
2363 static char buf[60];
2364 sprintf (buf, "generic linker can't handle %s",
2365 reloc_entry->howto->name);
2366 *error_message = buf;
2367 }
2368 return bfd_reloc_dangerous;
2369 }
2370
2371 struct ppc64_elf_obj_tdata
2372 {
2373 struct elf_obj_tdata elf;
2374
2375 /* Shortcuts to dynamic linker sections. */
2376 asection *got;
2377 asection *relgot;
2378
2379 union {
2380 /* Used during garbage collection. We attach global symbols defined
2381 on removed .opd entries to this section so that the sym is removed. */
2382 asection *deleted_section;
2383
2384 /* Used when adding symbols. */
2385 bfd_boolean has_dotsym;
2386 } u;
2387
2388 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2389 sections means we potentially need one of these for each input bfd. */
2390 union {
2391 bfd_signed_vma refcount;
2392 bfd_vma offset;
2393 } tlsld_got;
2394
2395 /* A copy of relocs before they are modified for --emit-relocs. */
2396 Elf_Internal_Rela *opd_relocs;
2397 };
2398
2399 #define ppc64_elf_tdata(bfd) \
2400 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2401
2402 #define ppc64_tlsld_got(bfd) \
2403 (&ppc64_elf_tdata (bfd)->tlsld_got)
2404
2405 /* Override the generic function because we store some extras. */
2406
2407 static bfd_boolean
2408 ppc64_elf_mkobject (bfd *abfd)
2409 {
2410 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2411 abfd->tdata.any = bfd_zalloc (abfd, amt);
2412 if (abfd->tdata.any == NULL)
2413 return FALSE;
2414 return TRUE;
2415 }
2416
2417 /* Return 1 if target is one of ours. */
2418
2419 static bfd_boolean
2420 is_ppc64_elf_target (const struct bfd_target *targ)
2421 {
2422 extern const bfd_target bfd_elf64_powerpc_vec;
2423 extern const bfd_target bfd_elf64_powerpcle_vec;
2424
2425 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2426 }
2427
2428 /* Fix bad default arch selected for a 64 bit input bfd when the
2429 default is 32 bit. */
2430
2431 static bfd_boolean
2432 ppc64_elf_object_p (bfd *abfd)
2433 {
2434 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2435 {
2436 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2437
2438 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2439 {
2440 /* Relies on arch after 32 bit default being 64 bit default. */
2441 abfd->arch_info = abfd->arch_info->next;
2442 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2443 }
2444 }
2445 return TRUE;
2446 }
2447
2448 /* Support for core dump NOTE sections. */
2449
2450 static bfd_boolean
2451 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2452 {
2453 size_t offset, size;
2454
2455 if (note->descsz != 504)
2456 return FALSE;
2457
2458 /* pr_cursig */
2459 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2460
2461 /* pr_pid */
2462 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2463
2464 /* pr_reg */
2465 offset = 112;
2466 size = 384;
2467
2468 /* Make a ".reg/999" section. */
2469 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2470 size, note->descpos + offset);
2471 }
2472
2473 static bfd_boolean
2474 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2475 {
2476 if (note->descsz != 136)
2477 return FALSE;
2478
2479 elf_tdata (abfd)->core_program
2480 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2481 elf_tdata (abfd)->core_command
2482 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2483
2484 return TRUE;
2485 }
2486
2487 /* Merge backend specific data from an object file to the output
2488 object file when linking. */
2489
2490 static bfd_boolean
2491 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2492 {
2493 /* Check if we have the same endianess. */
2494 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2495 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2496 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2497 {
2498 const char *msg;
2499
2500 if (bfd_big_endian (ibfd))
2501 msg = _("%B: compiled for a big endian system "
2502 "and target is little endian");
2503 else
2504 msg = _("%B: compiled for a little endian system "
2505 "and target is big endian");
2506
2507 (*_bfd_error_handler) (msg, ibfd);
2508
2509 bfd_set_error (bfd_error_wrong_format);
2510 return FALSE;
2511 }
2512
2513 return TRUE;
2514 }
2515
2516 /* Add extra PPC sections. */
2517
2518 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2519 {
2520 { ".plt", 4, 0, SHT_NOBITS, 0 },
2521 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2522 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2523 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2524 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2525 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2526 { NULL, 0, 0, 0, 0 }
2527 };
2528
2529 struct _ppc64_elf_section_data
2530 {
2531 struct bfd_elf_section_data elf;
2532
2533 /* An array with one entry for each opd function descriptor. */
2534 union
2535 {
2536 /* Points to the function code section for local opd entries. */
2537 asection **func_sec;
2538 /* After editing .opd, adjust references to opd local syms. */
2539 long *adjust;
2540 } opd;
2541
2542 /* An array for toc sections, indexed by offset/8.
2543 Specifies the relocation symbol index used at a given toc offset. */
2544 unsigned *t_symndx;
2545 };
2546
2547 #define ppc64_elf_section_data(sec) \
2548 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2549
2550 static bfd_boolean
2551 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2552 {
2553 if (!sec->used_by_bfd)
2554 {
2555 struct _ppc64_elf_section_data *sdata;
2556 bfd_size_type amt = sizeof (*sdata);
2557
2558 sdata = bfd_zalloc (abfd, amt);
2559 if (sdata == NULL)
2560 return FALSE;
2561 sec->used_by_bfd = sdata;
2562 }
2563
2564 return _bfd_elf_new_section_hook (abfd, sec);
2565 }
2566
2567 static void *
2568 get_opd_info (asection * sec)
2569 {
2570 if (sec != NULL
2571 && ppc64_elf_section_data (sec) != NULL
2572 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2573 return ppc64_elf_section_data (sec)->opd.adjust;
2574 return NULL;
2575 }
2576 \f
2577 /* Parameters for the qsort hook. */
2578 static asection *synthetic_opd;
2579 static bfd_boolean synthetic_relocatable;
2580
2581 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2582
2583 static int
2584 compare_symbols (const void *ap, const void *bp)
2585 {
2586 const asymbol *a = * (const asymbol **) ap;
2587 const asymbol *b = * (const asymbol **) bp;
2588
2589 /* Section symbols first. */
2590 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2591 return -1;
2592 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2593 return 1;
2594
2595 /* then .opd symbols. */
2596 if (a->section == synthetic_opd && b->section != synthetic_opd)
2597 return -1;
2598 if (a->section != synthetic_opd && b->section == synthetic_opd)
2599 return 1;
2600
2601 /* then other code symbols. */
2602 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2603 == (SEC_CODE | SEC_ALLOC)
2604 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2605 != (SEC_CODE | SEC_ALLOC))
2606 return -1;
2607
2608 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2609 != (SEC_CODE | SEC_ALLOC)
2610 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2611 == (SEC_CODE | SEC_ALLOC))
2612 return 1;
2613
2614 if (synthetic_relocatable)
2615 {
2616 if (a->section->id < b->section->id)
2617 return -1;
2618
2619 if (a->section->id > b->section->id)
2620 return 1;
2621 }
2622
2623 if (a->value + a->section->vma < b->value + b->section->vma)
2624 return -1;
2625
2626 if (a->value + a->section->vma > b->value + b->section->vma)
2627 return 1;
2628
2629 /* For syms with the same value, prefer strong dynamic global function
2630 syms over other syms. */
2631 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2632 return -1;
2633
2634 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2635 return 1;
2636
2637 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2638 return -1;
2639
2640 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2641 return 1;
2642
2643 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2644 return -1;
2645
2646 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2647 return 1;
2648
2649 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2650 return -1;
2651
2652 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2653 return 1;
2654
2655 return 0;
2656 }
2657
2658 /* Search SYMS for a symbol of the given VALUE. */
2659
2660 static asymbol *
2661 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2662 {
2663 long mid;
2664
2665 if (id == -1)
2666 {
2667 while (lo < hi)
2668 {
2669 mid = (lo + hi) >> 1;
2670 if (syms[mid]->value + syms[mid]->section->vma < value)
2671 lo = mid + 1;
2672 else if (syms[mid]->value + syms[mid]->section->vma > value)
2673 hi = mid;
2674 else
2675 return syms[mid];
2676 }
2677 }
2678 else
2679 {
2680 while (lo < hi)
2681 {
2682 mid = (lo + hi) >> 1;
2683 if (syms[mid]->section->id < id)
2684 lo = mid + 1;
2685 else if (syms[mid]->section->id > id)
2686 hi = mid;
2687 else if (syms[mid]->value < value)
2688 lo = mid + 1;
2689 else if (syms[mid]->value > value)
2690 hi = mid;
2691 else
2692 return syms[mid];
2693 }
2694 }
2695 return NULL;
2696 }
2697
2698 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2699 entry syms. */
2700
2701 static long
2702 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2703 long static_count, asymbol **static_syms,
2704 long dyn_count, asymbol **dyn_syms,
2705 asymbol **ret)
2706 {
2707 asymbol *s;
2708 long i;
2709 long count;
2710 char *names;
2711 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2712 asection *opd;
2713 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2714 asymbol **syms;
2715
2716 *ret = NULL;
2717
2718 opd = bfd_get_section_by_name (abfd, ".opd");
2719 if (opd == NULL)
2720 return 0;
2721
2722 symcount = static_count;
2723 if (!relocatable)
2724 symcount += dyn_count;
2725 if (symcount == 0)
2726 return 0;
2727
2728 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2729 if (syms == NULL)
2730 return -1;
2731
2732 if (!relocatable && static_count != 0 && dyn_count != 0)
2733 {
2734 /* Use both symbol tables. */
2735 memcpy (syms, static_syms, static_count * sizeof (*syms));
2736 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2737 }
2738 else if (!relocatable && static_count == 0)
2739 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2740 else
2741 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2742
2743 synthetic_opd = opd;
2744 synthetic_relocatable = relocatable;
2745 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2746
2747 if (!relocatable && symcount > 1)
2748 {
2749 long j;
2750 /* Trim duplicate syms, since we may have merged the normal and
2751 dynamic symbols. Actually, we only care about syms that have
2752 different values, so trim any with the same value. */
2753 for (i = 1, j = 1; i < symcount; ++i)
2754 if (syms[i - 1]->value + syms[i - 1]->section->vma
2755 != syms[i]->value + syms[i]->section->vma)
2756 syms[j++] = syms[i];
2757 symcount = j;
2758 }
2759
2760 i = 0;
2761 if (syms[i]->section == opd)
2762 ++i;
2763 codesecsym = i;
2764
2765 for (; i < symcount; ++i)
2766 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2767 != (SEC_CODE | SEC_ALLOC))
2768 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2769 break;
2770 codesecsymend = i;
2771
2772 for (; i < symcount; ++i)
2773 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2774 break;
2775 secsymend = i;
2776
2777 for (; i < symcount; ++i)
2778 if (syms[i]->section != opd)
2779 break;
2780 opdsymend = i;
2781
2782 for (; i < symcount; ++i)
2783 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2784 != (SEC_CODE | SEC_ALLOC))
2785 break;
2786 symcount = i;
2787
2788 count = 0;
2789 if (opdsymend == secsymend)
2790 goto done;
2791
2792 if (relocatable)
2793 {
2794 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2795 arelent *r;
2796 size_t size;
2797 long relcount;
2798
2799 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2800 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2801 if (relcount == 0)
2802 goto done;
2803
2804 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2805 {
2806 count = -1;
2807 goto done;
2808 }
2809
2810 size = 0;
2811 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2812 {
2813 asymbol *sym;
2814
2815 while (r < opd->relocation + relcount
2816 && r->address < syms[i]->value + opd->vma)
2817 ++r;
2818
2819 if (r == opd->relocation + relcount)
2820 break;
2821
2822 if (r->address != syms[i]->value + opd->vma)
2823 continue;
2824
2825 if (r->howto->type != R_PPC64_ADDR64)
2826 continue;
2827
2828 sym = *r->sym_ptr_ptr;
2829 if (!sym_exists_at (syms, opdsymend, symcount,
2830 sym->section->id, sym->value + r->addend))
2831 {
2832 ++count;
2833 size += sizeof (asymbol);
2834 size += strlen (syms[i]->name) + 2;
2835 }
2836 }
2837
2838 s = *ret = bfd_malloc (size);
2839 if (s == NULL)
2840 {
2841 count = -1;
2842 goto done;
2843 }
2844
2845 names = (char *) (s + count);
2846
2847 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2848 {
2849 asymbol *sym;
2850
2851 while (r < opd->relocation + relcount
2852 && r->address < syms[i]->value + opd->vma)
2853 ++r;
2854
2855 if (r == opd->relocation + relcount)
2856 break;
2857
2858 if (r->address != syms[i]->value + opd->vma)
2859 continue;
2860
2861 if (r->howto->type != R_PPC64_ADDR64)
2862 continue;
2863
2864 sym = *r->sym_ptr_ptr;
2865 if (!sym_exists_at (syms, opdsymend, symcount,
2866 sym->section->id, sym->value + r->addend))
2867 {
2868 size_t len;
2869
2870 *s = *syms[i];
2871 s->section = sym->section;
2872 s->value = sym->value + r->addend;
2873 s->name = names;
2874 *names++ = '.';
2875 len = strlen (syms[i]->name);
2876 memcpy (names, syms[i]->name, len + 1);
2877 names += len + 1;
2878 s++;
2879 }
2880 }
2881 }
2882 else
2883 {
2884 bfd_byte *contents;
2885 size_t size;
2886
2887 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2888 {
2889 if (contents)
2890 {
2891 free_contents_and_exit:
2892 free (contents);
2893 }
2894 count = -1;
2895 goto done;
2896 }
2897
2898 size = 0;
2899 for (i = secsymend; i < opdsymend; ++i)
2900 {
2901 bfd_vma ent;
2902
2903 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2904 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2905 {
2906 ++count;
2907 size += sizeof (asymbol);
2908 size += strlen (syms[i]->name) + 2;
2909 }
2910 }
2911
2912 s = *ret = bfd_malloc (size);
2913 if (s == NULL)
2914 goto free_contents_and_exit;
2915
2916 names = (char *) (s + count);
2917
2918 for (i = secsymend; i < opdsymend; ++i)
2919 {
2920 bfd_vma ent;
2921
2922 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2923 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2924 {
2925 long lo, hi;
2926 size_t len;
2927 asection *sec = abfd->sections;
2928
2929 *s = *syms[i];
2930 lo = codesecsym;
2931 hi = codesecsymend;
2932 while (lo < hi)
2933 {
2934 long mid = (lo + hi) >> 1;
2935 if (syms[mid]->section->vma < ent)
2936 lo = mid + 1;
2937 else if (syms[mid]->section->vma > ent)
2938 hi = mid;
2939 else
2940 {
2941 sec = syms[mid]->section;
2942 break;
2943 }
2944 }
2945
2946 if (lo >= hi && lo > codesecsym)
2947 sec = syms[lo - 1]->section;
2948
2949 for (; sec != NULL; sec = sec->next)
2950 {
2951 if (sec->vma > ent)
2952 break;
2953 if ((sec->flags & SEC_ALLOC) == 0
2954 || (sec->flags & SEC_LOAD) == 0)
2955 break;
2956 if ((sec->flags & SEC_CODE) != 0)
2957 s->section = sec;
2958 }
2959 s->value = ent - s->section->vma;
2960 s->name = names;
2961 *names++ = '.';
2962 len = strlen (syms[i]->name);
2963 memcpy (names, syms[i]->name, len + 1);
2964 names += len + 1;
2965 s++;
2966 }
2967 }
2968 free (contents);
2969 }
2970
2971 done:
2972 free (syms);
2973 return count;
2974 }
2975 \f
2976 /* The following functions are specific to the ELF linker, while
2977 functions above are used generally. Those named ppc64_elf_* are
2978 called by the main ELF linker code. They appear in this file more
2979 or less in the order in which they are called. eg.
2980 ppc64_elf_check_relocs is called early in the link process,
2981 ppc64_elf_finish_dynamic_sections is one of the last functions
2982 called.
2983
2984 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2985 functions have both a function code symbol and a function descriptor
2986 symbol. A call to foo in a relocatable object file looks like:
2987
2988 . .text
2989 . x:
2990 . bl .foo
2991 . nop
2992
2993 The function definition in another object file might be:
2994
2995 . .section .opd
2996 . foo: .quad .foo
2997 . .quad .TOC.@tocbase
2998 . .quad 0
2999 .
3000 . .text
3001 . .foo: blr
3002
3003 When the linker resolves the call during a static link, the branch
3004 unsurprisingly just goes to .foo and the .opd information is unused.
3005 If the function definition is in a shared library, things are a little
3006 different: The call goes via a plt call stub, the opd information gets
3007 copied to the plt, and the linker patches the nop.
3008
3009 . x:
3010 . bl .foo_stub
3011 . ld 2,40(1)
3012 .
3013 .
3014 . .foo_stub:
3015 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3016 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3017 . std 2,40(1) # this is the general idea
3018 . ld 11,0(12)
3019 . ld 2,8(12)
3020 . mtctr 11
3021 . ld 11,16(12)
3022 . bctr
3023 .
3024 . .section .plt
3025 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3026
3027 The "reloc ()" notation is supposed to indicate that the linker emits
3028 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3029 copying.
3030
3031 What are the difficulties here? Well, firstly, the relocations
3032 examined by the linker in check_relocs are against the function code
3033 sym .foo, while the dynamic relocation in the plt is emitted against
3034 the function descriptor symbol, foo. Somewhere along the line, we need
3035 to carefully copy dynamic link information from one symbol to the other.
3036 Secondly, the generic part of the elf linker will make .foo a dynamic
3037 symbol as is normal for most other backends. We need foo dynamic
3038 instead, at least for an application final link. However, when
3039 creating a shared library containing foo, we need to have both symbols
3040 dynamic so that references to .foo are satisfied during the early
3041 stages of linking. Otherwise the linker might decide to pull in a
3042 definition from some other object, eg. a static library.
3043
3044 Update: As of August 2004, we support a new convention. Function
3045 calls may use the function descriptor symbol, ie. "bl foo". This
3046 behaves exactly as "bl .foo". */
3047
3048 /* The linker needs to keep track of the number of relocs that it
3049 decides to copy as dynamic relocs in check_relocs for each symbol.
3050 This is so that it can later discard them if they are found to be
3051 unnecessary. We store the information in a field extending the
3052 regular ELF linker hash table. */
3053
3054 struct ppc_dyn_relocs
3055 {
3056 struct ppc_dyn_relocs *next;
3057
3058 /* The input section of the reloc. */
3059 asection *sec;
3060
3061 /* Total number of relocs copied for the input section. */
3062 bfd_size_type count;
3063
3064 /* Number of pc-relative relocs copied for the input section. */
3065 bfd_size_type pc_count;
3066 };
3067
3068 /* Track GOT entries needed for a given symbol. We might need more
3069 than one got entry per symbol. */
3070 struct got_entry
3071 {
3072 struct got_entry *next;
3073
3074 /* The symbol addend that we'll be placing in the GOT. */
3075 bfd_vma addend;
3076
3077 /* Unlike other ELF targets, we use separate GOT entries for the same
3078 symbol referenced from different input files. This is to support
3079 automatic multiple TOC/GOT sections, where the TOC base can vary
3080 from one input file to another.
3081
3082 Point to the BFD owning this GOT entry. */
3083 bfd *owner;
3084
3085 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3086 TLS_TPREL or TLS_DTPREL for tls entries. */
3087 char tls_type;
3088
3089 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3090 union
3091 {
3092 bfd_signed_vma refcount;
3093 bfd_vma offset;
3094 } got;
3095 };
3096
3097 /* The same for PLT. */
3098 struct plt_entry
3099 {
3100 struct plt_entry *next;
3101
3102 bfd_vma addend;
3103
3104 union
3105 {
3106 bfd_signed_vma refcount;
3107 bfd_vma offset;
3108 } plt;
3109 };
3110
3111 /* Of those relocs that might be copied as dynamic relocs, this macro
3112 selects those that must be copied when linking a shared library,
3113 even when the symbol is local. */
3114
3115 #define MUST_BE_DYN_RELOC(RTYPE) \
3116 ((RTYPE) != R_PPC64_REL32 \
3117 && (RTYPE) != R_PPC64_REL64 \
3118 && (RTYPE) != R_PPC64_REL30)
3119
3120 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3121 copying dynamic variables from a shared lib into an app's dynbss
3122 section, and instead use a dynamic relocation to point into the
3123 shared lib. With code that gcc generates, it's vital that this be
3124 enabled; In the PowerPC64 ABI, the address of a function is actually
3125 the address of a function descriptor, which resides in the .opd
3126 section. gcc uses the descriptor directly rather than going via the
3127 GOT as some other ABI's do, which means that initialized function
3128 pointers must reference the descriptor. Thus, a function pointer
3129 initialized to the address of a function in a shared library will
3130 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3131 redefines the function descriptor symbol to point to the copy. This
3132 presents a problem as a plt entry for that function is also
3133 initialized from the function descriptor symbol and the copy reloc
3134 may not be initialized first. */
3135 #define ELIMINATE_COPY_RELOCS 1
3136
3137 /* Section name for stubs is the associated section name plus this
3138 string. */
3139 #define STUB_SUFFIX ".stub"
3140
3141 /* Linker stubs.
3142 ppc_stub_long_branch:
3143 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3144 destination, but a 24 bit branch in a stub section will reach.
3145 . b dest
3146
3147 ppc_stub_plt_branch:
3148 Similar to the above, but a 24 bit branch in the stub section won't
3149 reach its destination.
3150 . addis %r12,%r2,xxx@toc@ha
3151 . ld %r11,xxx@toc@l(%r12)
3152 . mtctr %r11
3153 . bctr
3154
3155 ppc_stub_plt_call:
3156 Used to call a function in a shared library. If it so happens that
3157 the plt entry referenced crosses a 64k boundary, then an extra
3158 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3159 xxx+16 as appropriate.
3160 . addis %r12,%r2,xxx@toc@ha
3161 . std %r2,40(%r1)
3162 . ld %r11,xxx+0@toc@l(%r12)
3163 . ld %r2,xxx+8@toc@l(%r12)
3164 . mtctr %r11
3165 . ld %r11,xxx+16@toc@l(%r12)
3166 . bctr
3167
3168 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3169 code to adjust the value and save r2 to support multiple toc sections.
3170 A ppc_stub_long_branch with an r2 offset looks like:
3171 . std %r2,40(%r1)
3172 . addis %r2,%r2,off@ha
3173 . addi %r2,%r2,off@l
3174 . b dest
3175
3176 A ppc_stub_plt_branch with an r2 offset looks like:
3177 . std %r2,40(%r1)
3178 . addis %r12,%r2,xxx@toc@ha
3179 . ld %r11,xxx@toc@l(%r12)
3180 . addis %r2,%r2,off@ha
3181 . addi %r2,%r2,off@l
3182 . mtctr %r11
3183 . bctr
3184 */
3185
3186 enum ppc_stub_type {
3187 ppc_stub_none,
3188 ppc_stub_long_branch,
3189 ppc_stub_long_branch_r2off,
3190 ppc_stub_plt_branch,
3191 ppc_stub_plt_branch_r2off,
3192 ppc_stub_plt_call
3193 };
3194
3195 struct ppc_stub_hash_entry {
3196
3197 /* Base hash table entry structure. */
3198 struct bfd_hash_entry root;
3199
3200 enum ppc_stub_type stub_type;
3201
3202 /* The stub section. */
3203 asection *stub_sec;
3204
3205 /* Offset within stub_sec of the beginning of this stub. */
3206 bfd_vma stub_offset;
3207
3208 /* Given the symbol's value and its section we can determine its final
3209 value when building the stubs (so the stub knows where to jump. */
3210 bfd_vma target_value;
3211 asection *target_section;
3212
3213 /* The symbol table entry, if any, that this was derived from. */
3214 struct ppc_link_hash_entry *h;
3215
3216 /* And the reloc addend that this was derived from. */
3217 bfd_vma addend;
3218
3219 /* Where this stub is being called from, or, in the case of combined
3220 stub sections, the first input section in the group. */
3221 asection *id_sec;
3222 };
3223
3224 struct ppc_branch_hash_entry {
3225
3226 /* Base hash table entry structure. */
3227 struct bfd_hash_entry root;
3228
3229 /* Offset within branch lookup table. */
3230 unsigned int offset;
3231
3232 /* Generation marker. */
3233 unsigned int iter;
3234 };
3235
3236 struct ppc_link_hash_entry
3237 {
3238 struct elf_link_hash_entry elf;
3239
3240 /* A pointer to the most recently used stub hash entry against this
3241 symbol. */
3242 struct ppc_stub_hash_entry *stub_cache;
3243
3244 /* Track dynamic relocs copied for this symbol. */
3245 struct ppc_dyn_relocs *dyn_relocs;
3246
3247 /* Link between function code and descriptor symbols. */
3248 struct ppc_link_hash_entry *oh;
3249
3250 /* Flag function code and descriptor symbols. */
3251 unsigned int is_func:1;
3252 unsigned int is_func_descriptor:1;
3253 unsigned int fake:1;
3254
3255 /* Whether global opd/toc sym has been adjusted or not.
3256 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3257 should be set for all globals defined in any opd/toc section. */
3258 unsigned int adjust_done:1;
3259
3260 /* Set if we twiddled this symbol to weak at some stage. */
3261 unsigned int was_undefined:1;
3262
3263 /* Contexts in which symbol is used in the GOT (or TOC).
3264 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3265 corresponding relocs are encountered during check_relocs.
3266 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3267 indicate the corresponding GOT entry type is not needed.
3268 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3269 a TPREL one. We use a separate flag rather than setting TPREL
3270 just for convenience in distinguishing the two cases. */
3271 #define TLS_GD 1 /* GD reloc. */
3272 #define TLS_LD 2 /* LD reloc. */
3273 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3274 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3275 #define TLS_TLS 16 /* Any TLS reloc. */
3276 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3277 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3278 char tls_mask;
3279 };
3280
3281 /* ppc64 ELF linker hash table. */
3282
3283 struct ppc_link_hash_table
3284 {
3285 struct elf_link_hash_table elf;
3286
3287 /* The stub hash table. */
3288 struct bfd_hash_table stub_hash_table;
3289
3290 /* Another hash table for plt_branch stubs. */
3291 struct bfd_hash_table branch_hash_table;
3292
3293 /* Linker stub bfd. */
3294 bfd *stub_bfd;
3295
3296 /* Linker call-backs. */
3297 asection * (*add_stub_section) (const char *, asection *);
3298 void (*layout_sections_again) (void);
3299
3300 /* Array to keep track of which stub sections have been created, and
3301 information on stub grouping. */
3302 struct map_stub {
3303 /* This is the section to which stubs in the group will be attached. */
3304 asection *link_sec;
3305 /* The stub section. */
3306 asection *stub_sec;
3307 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3308 bfd_vma toc_off;
3309 } *stub_group;
3310
3311 /* Temp used when calculating TOC pointers. */
3312 bfd_vma toc_curr;
3313
3314 /* Highest input section id. */
3315 int top_id;
3316
3317 /* Highest output section index. */
3318 int top_index;
3319
3320 /* List of input sections for each output section. */
3321 asection **input_list;
3322
3323 /* Short-cuts to get to dynamic linker sections. */
3324 asection *got;
3325 asection *plt;
3326 asection *relplt;
3327 asection *dynbss;
3328 asection *relbss;
3329 asection *glink;
3330 asection *sfpr;
3331 asection *brlt;
3332 asection *relbrlt;
3333
3334 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3335 struct ppc_link_hash_entry *tls_get_addr;
3336 struct ppc_link_hash_entry *tls_get_addr_fd;
3337
3338 /* Statistics. */
3339 unsigned long stub_count[ppc_stub_plt_call];
3340
3341 /* Number of stubs against global syms. */
3342 unsigned long stub_globals;
3343
3344 /* Set if we should emit symbols for stubs. */
3345 unsigned int emit_stub_syms:1;
3346
3347 /* Support for multiple toc sections. */
3348 unsigned int no_multi_toc:1;
3349 unsigned int multi_toc_needed:1;
3350
3351 /* Set on error. */
3352 unsigned int stub_error:1;
3353
3354 /* Flag set when small branches are detected. Used to
3355 select suitable defaults for the stub group size. */
3356 unsigned int has_14bit_branch:1;
3357
3358 /* Temp used by ppc64_elf_check_directives. */
3359 unsigned int twiddled_syms:1;
3360
3361 /* Incremented every time we size stubs. */
3362 unsigned int stub_iteration;
3363
3364 /* Small local sym to section mapping cache. */
3365 struct sym_sec_cache sym_sec;
3366 };
3367
3368 /* Rename some of the generic section flags to better document how they
3369 are used here. */
3370 #define has_toc_reloc has_gp_reloc
3371 #define makes_toc_func_call need_finalize_relax
3372 #define call_check_in_progress reloc_done
3373
3374 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3375
3376 #define ppc_hash_table(p) \
3377 ((struct ppc_link_hash_table *) ((p)->hash))
3378
3379 #define ppc_stub_hash_lookup(table, string, create, copy) \
3380 ((struct ppc_stub_hash_entry *) \
3381 bfd_hash_lookup ((table), (string), (create), (copy)))
3382
3383 #define ppc_branch_hash_lookup(table, string, create, copy) \
3384 ((struct ppc_branch_hash_entry *) \
3385 bfd_hash_lookup ((table), (string), (create), (copy)))
3386
3387 /* Create an entry in the stub hash table. */
3388
3389 static struct bfd_hash_entry *
3390 stub_hash_newfunc (struct bfd_hash_entry *entry,
3391 struct bfd_hash_table *table,
3392 const char *string)
3393 {
3394 /* Allocate the structure if it has not already been allocated by a
3395 subclass. */
3396 if (entry == NULL)
3397 {
3398 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3399 if (entry == NULL)
3400 return entry;
3401 }
3402
3403 /* Call the allocation method of the superclass. */
3404 entry = bfd_hash_newfunc (entry, table, string);
3405 if (entry != NULL)
3406 {
3407 struct ppc_stub_hash_entry *eh;
3408
3409 /* Initialize the local fields. */
3410 eh = (struct ppc_stub_hash_entry *) entry;
3411 eh->stub_type = ppc_stub_none;
3412 eh->stub_sec = NULL;
3413 eh->stub_offset = 0;
3414 eh->target_value = 0;
3415 eh->target_section = NULL;
3416 eh->h = NULL;
3417 eh->id_sec = NULL;
3418 }
3419
3420 return entry;
3421 }
3422
3423 /* Create an entry in the branch hash table. */
3424
3425 static struct bfd_hash_entry *
3426 branch_hash_newfunc (struct bfd_hash_entry *entry,
3427 struct bfd_hash_table *table,
3428 const char *string)
3429 {
3430 /* Allocate the structure if it has not already been allocated by a
3431 subclass. */
3432 if (entry == NULL)
3433 {
3434 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3435 if (entry == NULL)
3436 return entry;
3437 }
3438
3439 /* Call the allocation method of the superclass. */
3440 entry = bfd_hash_newfunc (entry, table, string);
3441 if (entry != NULL)
3442 {
3443 struct ppc_branch_hash_entry *eh;
3444
3445 /* Initialize the local fields. */
3446 eh = (struct ppc_branch_hash_entry *) entry;
3447 eh->offset = 0;
3448 eh->iter = 0;
3449 }
3450
3451 return entry;
3452 }
3453
3454 /* Create an entry in a ppc64 ELF linker hash table. */
3455
3456 static struct bfd_hash_entry *
3457 link_hash_newfunc (struct bfd_hash_entry *entry,
3458 struct bfd_hash_table *table,
3459 const char *string)
3460 {
3461 /* Allocate the structure if it has not already been allocated by a
3462 subclass. */
3463 if (entry == NULL)
3464 {
3465 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3466 if (entry == NULL)
3467 return entry;
3468 }
3469
3470 /* Call the allocation method of the superclass. */
3471 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3472 if (entry != NULL)
3473 {
3474 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3475
3476 memset (&eh->stub_cache, 0,
3477 (sizeof (struct ppc_link_hash_entry)
3478 - offsetof (struct ppc_link_hash_entry, stub_cache)));
3479 }
3480
3481 return entry;
3482 }
3483
3484 /* Create a ppc64 ELF linker hash table. */
3485
3486 static struct bfd_link_hash_table *
3487 ppc64_elf_link_hash_table_create (bfd *abfd)
3488 {
3489 struct ppc_link_hash_table *htab;
3490 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3491
3492 htab = bfd_zmalloc (amt);
3493 if (htab == NULL)
3494 return NULL;
3495
3496 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3497 sizeof (struct ppc_link_hash_entry)))
3498 {
3499 free (htab);
3500 return NULL;
3501 }
3502
3503 /* Init the stub hash table too. */
3504 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3505 sizeof (struct ppc_stub_hash_entry)))
3506 return NULL;
3507
3508 /* And the branch hash table. */
3509 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3510 sizeof (struct ppc_branch_hash_entry)))
3511 return NULL;
3512
3513 /* Initializing two fields of the union is just cosmetic. We really
3514 only care about glist, but when compiled on a 32-bit host the
3515 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3516 debugger inspection of these fields look nicer. */
3517 htab->elf.init_got_refcount.refcount = 0;
3518 htab->elf.init_got_refcount.glist = NULL;
3519 htab->elf.init_plt_refcount.refcount = 0;
3520 htab->elf.init_plt_refcount.glist = NULL;
3521 htab->elf.init_got_offset.offset = 0;
3522 htab->elf.init_got_offset.glist = NULL;
3523 htab->elf.init_plt_offset.offset = 0;
3524 htab->elf.init_plt_offset.glist = NULL;
3525
3526 return &htab->elf.root;
3527 }
3528
3529 /* Free the derived linker hash table. */
3530
3531 static void
3532 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3533 {
3534 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3535
3536 bfd_hash_table_free (&ret->stub_hash_table);
3537 bfd_hash_table_free (&ret->branch_hash_table);
3538 _bfd_generic_link_hash_table_free (hash);
3539 }
3540
3541 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3542
3543 void
3544 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3545 {
3546 struct ppc_link_hash_table *htab;
3547
3548 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3549
3550 /* Always hook our dynamic sections into the first bfd, which is the
3551 linker created stub bfd. This ensures that the GOT header is at
3552 the start of the output TOC section. */
3553 htab = ppc_hash_table (info);
3554 htab->stub_bfd = abfd;
3555 htab->elf.dynobj = abfd;
3556 }
3557
3558 /* Build a name for an entry in the stub hash table. */
3559
3560 static char *
3561 ppc_stub_name (const asection *input_section,
3562 const asection *sym_sec,
3563 const struct ppc_link_hash_entry *h,
3564 const Elf_Internal_Rela *rel)
3565 {
3566 char *stub_name;
3567 bfd_size_type len;
3568
3569 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3570 offsets from a sym as a branch target? In fact, we could
3571 probably assume the addend is always zero. */
3572 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3573
3574 if (h)
3575 {
3576 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3577 stub_name = bfd_malloc (len);
3578 if (stub_name == NULL)
3579 return stub_name;
3580
3581 sprintf (stub_name, "%08x.%s+%x",
3582 input_section->id & 0xffffffff,
3583 h->elf.root.root.string,
3584 (int) rel->r_addend & 0xffffffff);
3585 }
3586 else
3587 {
3588 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3589 stub_name = bfd_malloc (len);
3590 if (stub_name == NULL)
3591 return stub_name;
3592
3593 sprintf (stub_name, "%08x.%x:%x+%x",
3594 input_section->id & 0xffffffff,
3595 sym_sec->id & 0xffffffff,
3596 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3597 (int) rel->r_addend & 0xffffffff);
3598 }
3599 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3600 stub_name[len - 2] = 0;
3601 return stub_name;
3602 }
3603
3604 /* Look up an entry in the stub hash. Stub entries are cached because
3605 creating the stub name takes a bit of time. */
3606
3607 static struct ppc_stub_hash_entry *
3608 ppc_get_stub_entry (const asection *input_section,
3609 const asection *sym_sec,
3610 struct ppc_link_hash_entry *h,
3611 const Elf_Internal_Rela *rel,
3612 struct ppc_link_hash_table *htab)
3613 {
3614 struct ppc_stub_hash_entry *stub_entry;
3615 const asection *id_sec;
3616
3617 /* If this input section is part of a group of sections sharing one
3618 stub section, then use the id of the first section in the group.
3619 Stub names need to include a section id, as there may well be
3620 more than one stub used to reach say, printf, and we need to
3621 distinguish between them. */
3622 id_sec = htab->stub_group[input_section->id].link_sec;
3623
3624 if (h != NULL && h->stub_cache != NULL
3625 && h->stub_cache->h == h
3626 && h->stub_cache->id_sec == id_sec)
3627 {
3628 stub_entry = h->stub_cache;
3629 }
3630 else
3631 {
3632 char *stub_name;
3633
3634 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3635 if (stub_name == NULL)
3636 return NULL;
3637
3638 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3639 stub_name, FALSE, FALSE);
3640 if (h != NULL)
3641 h->stub_cache = stub_entry;
3642
3643 free (stub_name);
3644 }
3645
3646 return stub_entry;
3647 }
3648
3649 /* Add a new stub entry to the stub hash. Not all fields of the new
3650 stub entry are initialised. */
3651
3652 static struct ppc_stub_hash_entry *
3653 ppc_add_stub (const char *stub_name,
3654 asection *section,
3655 struct ppc_link_hash_table *htab)
3656 {
3657 asection *link_sec;
3658 asection *stub_sec;
3659 struct ppc_stub_hash_entry *stub_entry;
3660
3661 link_sec = htab->stub_group[section->id].link_sec;
3662 stub_sec = htab->stub_group[section->id].stub_sec;
3663 if (stub_sec == NULL)
3664 {
3665 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3666 if (stub_sec == NULL)
3667 {
3668 size_t namelen;
3669 bfd_size_type len;
3670 char *s_name;
3671
3672 namelen = strlen (link_sec->name);
3673 len = namelen + sizeof (STUB_SUFFIX);
3674 s_name = bfd_alloc (htab->stub_bfd, len);
3675 if (s_name == NULL)
3676 return NULL;
3677
3678 memcpy (s_name, link_sec->name, namelen);
3679 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3680 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3681 if (stub_sec == NULL)
3682 return NULL;
3683 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3684 }
3685 htab->stub_group[section->id].stub_sec = stub_sec;
3686 }
3687
3688 /* Enter this entry into the linker stub hash table. */
3689 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3690 TRUE, FALSE);
3691 if (stub_entry == NULL)
3692 {
3693 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3694 section->owner, stub_name);
3695 return NULL;
3696 }
3697
3698 stub_entry->stub_sec = stub_sec;
3699 stub_entry->stub_offset = 0;
3700 stub_entry->id_sec = link_sec;
3701 return stub_entry;
3702 }
3703
3704 /* Create sections for linker generated code. */
3705
3706 static bfd_boolean
3707 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3708 {
3709 struct ppc_link_hash_table *htab;
3710 flagword flags;
3711
3712 htab = ppc_hash_table (info);
3713
3714 /* Create .sfpr for code to save and restore fp regs. */
3715 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3716 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3717 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3718 flags);
3719 if (htab->sfpr == NULL
3720 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3721 return FALSE;
3722
3723 /* Create .glink for lazy dynamic linking support. */
3724 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3725 flags);
3726 if (htab->glink == NULL
3727 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3728 return FALSE;
3729
3730 /* Create branch lookup table for plt_branch stubs. */
3731 if (info->shared)
3732 {
3733 flags = (SEC_ALLOC | SEC_LOAD
3734 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3735 htab->brlt
3736 = bfd_make_section_anyway_with_flags (dynobj, ".data.rel.ro.brlt",
3737 flags);
3738 }
3739 else
3740 {
3741 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3742 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3743 htab->brlt
3744 = bfd_make_section_anyway_with_flags (dynobj, ".rodata.brlt", flags);
3745 }
3746
3747 if (htab->brlt == NULL
3748 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3749 return FALSE;
3750
3751 if (info->shared)
3752 {
3753 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3754 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3755 htab->relbrlt
3756 = bfd_make_section_anyway_with_flags (dynobj, ".rela.data.rel.ro.brlt",
3757 flags);
3758 }
3759 else if (info->emitrelocations)
3760 {
3761 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3762 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3763 htab->relbrlt
3764 = bfd_make_section_anyway_with_flags (dynobj, ".rela.rodata.brlt",
3765 flags);
3766 }
3767 else
3768 return TRUE;
3769
3770 if (!htab->relbrlt
3771 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3772 return FALSE;
3773
3774 return TRUE;
3775 }
3776
3777 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3778 not already done. */
3779
3780 static bfd_boolean
3781 create_got_section (bfd *abfd, struct bfd_link_info *info)
3782 {
3783 asection *got, *relgot;
3784 flagword flags;
3785 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3786
3787 if (!htab->got)
3788 {
3789 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3790 return FALSE;
3791
3792 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3793 if (!htab->got)
3794 abort ();
3795 }
3796
3797 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3798 | SEC_LINKER_CREATED);
3799
3800 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3801 if (!got
3802 || !bfd_set_section_alignment (abfd, got, 3))
3803 return FALSE;
3804
3805 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3806 flags | SEC_READONLY);
3807 if (!relgot
3808 || ! bfd_set_section_alignment (abfd, relgot, 3))
3809 return FALSE;
3810
3811 ppc64_elf_tdata (abfd)->got = got;
3812 ppc64_elf_tdata (abfd)->relgot = relgot;
3813 return TRUE;
3814 }
3815
3816 /* Create the dynamic sections, and set up shortcuts. */
3817
3818 static bfd_boolean
3819 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3820 {
3821 struct ppc_link_hash_table *htab;
3822
3823 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3824 return FALSE;
3825
3826 htab = ppc_hash_table (info);
3827 if (!htab->got)
3828 htab->got = bfd_get_section_by_name (dynobj, ".got");
3829 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3830 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3831 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3832 if (!info->shared)
3833 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3834
3835 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3836 || (!info->shared && !htab->relbss))
3837 abort ();
3838
3839 return TRUE;
3840 }
3841
3842 /* Merge PLT info on FROM with that on TO. */
3843
3844 static void
3845 move_plt_plist (struct ppc_link_hash_entry *from,
3846 struct ppc_link_hash_entry *to)
3847 {
3848 if (from->elf.plt.plist != NULL)
3849 {
3850 if (to->elf.plt.plist != NULL)
3851 {
3852 struct plt_entry **entp;
3853 struct plt_entry *ent;
3854
3855 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3856 {
3857 struct plt_entry *dent;
3858
3859 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3860 if (dent->addend == ent->addend)
3861 {
3862 dent->plt.refcount += ent->plt.refcount;
3863 *entp = ent->next;
3864 break;
3865 }
3866 if (dent == NULL)
3867 entp = &ent->next;
3868 }
3869 *entp = to->elf.plt.plist;
3870 }
3871
3872 to->elf.plt.plist = from->elf.plt.plist;
3873 from->elf.plt.plist = NULL;
3874 }
3875 }
3876
3877 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3878
3879 static void
3880 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3881 struct elf_link_hash_entry *dir,
3882 struct elf_link_hash_entry *ind)
3883 {
3884 struct ppc_link_hash_entry *edir, *eind;
3885
3886 edir = (struct ppc_link_hash_entry *) dir;
3887 eind = (struct ppc_link_hash_entry *) ind;
3888
3889 /* Copy over any dynamic relocs we may have on the indirect sym. */
3890 if (eind->dyn_relocs != NULL)
3891 {
3892 if (edir->dyn_relocs != NULL)
3893 {
3894 struct ppc_dyn_relocs **pp;
3895 struct ppc_dyn_relocs *p;
3896
3897 /* Add reloc counts against the indirect sym to the direct sym
3898 list. Merge any entries against the same section. */
3899 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3900 {
3901 struct ppc_dyn_relocs *q;
3902
3903 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3904 if (q->sec == p->sec)
3905 {
3906 q->pc_count += p->pc_count;
3907 q->count += p->count;
3908 *pp = p->next;
3909 break;
3910 }
3911 if (q == NULL)
3912 pp = &p->next;
3913 }
3914 *pp = edir->dyn_relocs;
3915 }
3916
3917 edir->dyn_relocs = eind->dyn_relocs;
3918 eind->dyn_relocs = NULL;
3919 }
3920
3921 edir->is_func |= eind->is_func;
3922 edir->is_func_descriptor |= eind->is_func_descriptor;
3923 edir->tls_mask |= eind->tls_mask;
3924
3925 /* If called to transfer flags for a weakdef during processing
3926 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
3927 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3928 if (!(ELIMINATE_COPY_RELOCS
3929 && eind->elf.root.type != bfd_link_hash_indirect
3930 && edir->elf.dynamic_adjusted))
3931 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3932
3933 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3934 edir->elf.ref_regular |= eind->elf.ref_regular;
3935 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3936 edir->elf.needs_plt |= eind->elf.needs_plt;
3937
3938 /* If we were called to copy over info for a weak sym, that's all. */
3939 if (eind->elf.root.type != bfd_link_hash_indirect)
3940 return;
3941
3942 /* Copy over got entries that we may have already seen to the
3943 symbol which just became indirect. */
3944 if (eind->elf.got.glist != NULL)
3945 {
3946 if (edir->elf.got.glist != NULL)
3947 {
3948 struct got_entry **entp;
3949 struct got_entry *ent;
3950
3951 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3952 {
3953 struct got_entry *dent;
3954
3955 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3956 if (dent->addend == ent->addend
3957 && dent->owner == ent->owner
3958 && dent->tls_type == ent->tls_type)
3959 {
3960 dent->got.refcount += ent->got.refcount;
3961 *entp = ent->next;
3962 break;
3963 }
3964 if (dent == NULL)
3965 entp = &ent->next;
3966 }
3967 *entp = edir->elf.got.glist;
3968 }
3969
3970 edir->elf.got.glist = eind->elf.got.glist;
3971 eind->elf.got.glist = NULL;
3972 }
3973
3974 /* And plt entries. */
3975 move_plt_plist (eind, edir);
3976
3977 if (eind->elf.dynindx != -1)
3978 {
3979 if (edir->elf.dynindx != -1)
3980 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3981 edir->elf.dynstr_index);
3982 edir->elf.dynindx = eind->elf.dynindx;
3983 edir->elf.dynstr_index = eind->elf.dynstr_index;
3984 eind->elf.dynindx = -1;
3985 eind->elf.dynstr_index = 0;
3986 }
3987 }
3988
3989 /* Find the function descriptor hash entry from the given function code
3990 hash entry FH. Link the entries via their OH fields. */
3991
3992 static struct ppc_link_hash_entry *
3993 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3994 {
3995 struct ppc_link_hash_entry *fdh = fh->oh;
3996
3997 if (fdh == NULL)
3998 {
3999 const char *fd_name = fh->elf.root.root.string + 1;
4000
4001 fdh = (struct ppc_link_hash_entry *)
4002 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4003 if (fdh != NULL)
4004 {
4005 fdh->is_func_descriptor = 1;
4006 fdh->oh = fh;
4007 fh->is_func = 1;
4008 fh->oh = fdh;
4009 }
4010 }
4011
4012 return fdh;
4013 }
4014
4015 /* Make a fake function descriptor sym for the code sym FH. */
4016
4017 static struct ppc_link_hash_entry *
4018 make_fdh (struct bfd_link_info *info,
4019 struct ppc_link_hash_entry *fh)
4020 {
4021 bfd *abfd;
4022 asymbol *newsym;
4023 struct bfd_link_hash_entry *bh;
4024 struct ppc_link_hash_entry *fdh;
4025
4026 abfd = fh->elf.root.u.undef.abfd;
4027 newsym = bfd_make_empty_symbol (abfd);
4028 newsym->name = fh->elf.root.root.string + 1;
4029 newsym->section = bfd_und_section_ptr;
4030 newsym->value = 0;
4031 newsym->flags = BSF_WEAK;
4032
4033 bh = NULL;
4034 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4035 newsym->flags, newsym->section,
4036 newsym->value, NULL, FALSE, FALSE,
4037 &bh))
4038 return NULL;
4039
4040 fdh = (struct ppc_link_hash_entry *) bh;
4041 fdh->elf.non_elf = 0;
4042 fdh->fake = 1;
4043 fdh->is_func_descriptor = 1;
4044 fdh->oh = fh;
4045 fh->is_func = 1;
4046 fh->oh = fdh;
4047 return fdh;
4048 }
4049
4050 /* Hacks to support old ABI code.
4051 When making function calls, old ABI code references function entry
4052 points (dot symbols), while new ABI code references the function
4053 descriptor symbol. We need to make any combination of reference and
4054 definition work together, without breaking archive linking.
4055
4056 For a defined function "foo" and an undefined call to "bar":
4057 An old object defines "foo" and ".foo", references ".bar" (possibly
4058 "bar" too).
4059 A new object defines "foo" and references "bar".
4060
4061 A new object thus has no problem with its undefined symbols being
4062 satisfied by definitions in an old object. On the other hand, the
4063 old object won't have ".bar" satisfied by a new object. */
4064
4065 /* Fix function descriptor symbols defined in .opd sections to be
4066 function type. */
4067
4068 static bfd_boolean
4069 ppc64_elf_add_symbol_hook (bfd *ibfd,
4070 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4071 Elf_Internal_Sym *isym,
4072 const char **name,
4073 flagword *flags ATTRIBUTE_UNUSED,
4074 asection **sec,
4075 bfd_vma *value ATTRIBUTE_UNUSED)
4076 {
4077 if (*sec != NULL
4078 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4079 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4080
4081 if ((*name)[0] == '.'
4082 && ELF_ST_BIND (isym->st_info) == STB_GLOBAL
4083 && ELF_ST_TYPE (isym->st_info) < STT_SECTION
4084 && is_ppc64_elf_target (ibfd->xvec))
4085 ppc64_elf_tdata (ibfd)->u.has_dotsym = 1;
4086
4087 return TRUE;
4088 }
4089
4090 /* This function makes an old ABI object reference to ".bar" cause the
4091 inclusion of a new ABI object archive that defines "bar".
4092 NAME is a symbol defined in an archive. Return a symbol in the hash
4093 table that might be satisfied by the archive symbols. */
4094
4095 static struct elf_link_hash_entry *
4096 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4097 struct bfd_link_info *info,
4098 const char *name)
4099 {
4100 struct elf_link_hash_entry *h;
4101 char *dot_name;
4102 size_t len;
4103
4104 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4105 if (h != NULL
4106 /* Don't return this sym if it is a fake function descriptor
4107 created by add_symbol_adjust. */
4108 && !(h->root.type == bfd_link_hash_undefweak
4109 && ((struct ppc_link_hash_entry *) h)->fake))
4110 return h;
4111
4112 if (name[0] == '.')
4113 return h;
4114
4115 len = strlen (name);
4116 dot_name = bfd_alloc (abfd, len + 2);
4117 if (dot_name == NULL)
4118 return (struct elf_link_hash_entry *) 0 - 1;
4119 dot_name[0] = '.';
4120 memcpy (dot_name + 1, name, len + 1);
4121 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4122 bfd_release (abfd, dot_name);
4123 return h;
4124 }
4125
4126 /* This function satisfies all old ABI object references to ".bar" if a
4127 new ABI object defines "bar". Well, at least, undefined dot symbols
4128 are made weak. This stops later archive searches from including an
4129 object if we already have a function descriptor definition. It also
4130 prevents the linker complaining about undefined symbols.
4131 We also check and correct mismatched symbol visibility here. The
4132 most restrictive visibility of the function descriptor and the
4133 function entry symbol is used. */
4134
4135 struct add_symbol_adjust_data
4136 {
4137 struct bfd_link_info *info;
4138 bfd_boolean ok;
4139 };
4140
4141 static bfd_boolean
4142 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
4143 {
4144 struct add_symbol_adjust_data *data;
4145 struct ppc_link_hash_table *htab;
4146 struct ppc_link_hash_entry *eh;
4147 struct ppc_link_hash_entry *fdh;
4148
4149 if (h->root.type == bfd_link_hash_indirect)
4150 return TRUE;
4151
4152 if (h->root.type == bfd_link_hash_warning)
4153 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4154
4155 if (h->root.root.string[0] != '.')
4156 return TRUE;
4157
4158 data = inf;
4159 htab = ppc_hash_table (data->info);
4160 eh = (struct ppc_link_hash_entry *) h;
4161 fdh = get_fdh (eh, htab);
4162 if (fdh == NULL
4163 && !data->info->relocatable
4164 && (eh->elf.root.type == bfd_link_hash_undefined
4165 || eh->elf.root.type == bfd_link_hash_undefweak)
4166 && eh->elf.ref_regular)
4167 {
4168 /* Make an undefweak function descriptor sym, which is enough to
4169 pull in an --as-needed shared lib, but won't cause link
4170 errors. Archives are handled elsewhere. */
4171 fdh = make_fdh (data->info, eh);
4172 if (fdh == NULL)
4173 data->ok = FALSE;
4174 else
4175 fdh->elf.ref_regular = 1;
4176 }
4177 else if (fdh != NULL)
4178 {
4179 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4180 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4181 if (entry_vis < descr_vis)
4182 fdh->elf.other += entry_vis - descr_vis;
4183 else if (entry_vis > descr_vis)
4184 eh->elf.other += descr_vis - entry_vis;
4185
4186 if ((fdh->elf.root.type == bfd_link_hash_defined
4187 || fdh->elf.root.type == bfd_link_hash_defweak)
4188 && eh->elf.root.type == bfd_link_hash_undefined)
4189 {
4190 eh->elf.root.type = bfd_link_hash_undefweak;
4191 eh->was_undefined = 1;
4192 htab->twiddled_syms = 1;
4193 }
4194 }
4195
4196 return TRUE;
4197 }
4198
4199 static bfd_boolean
4200 ppc64_elf_check_directives (bfd *abfd, struct bfd_link_info *info)
4201 {
4202 struct ppc_link_hash_table *htab;
4203 struct add_symbol_adjust_data data;
4204
4205 if (!is_ppc64_elf_target (abfd->xvec))
4206 return TRUE;
4207
4208 if (!ppc64_elf_tdata (abfd)->u.has_dotsym)
4209 return TRUE;
4210 ppc64_elf_tdata (abfd)->u.deleted_section = NULL;
4211
4212 htab = ppc_hash_table (info);
4213 if (!is_ppc64_elf_target (htab->elf.root.creator))
4214 return TRUE;
4215
4216 data.info = info;
4217 data.ok = TRUE;
4218 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, &data);
4219
4220 /* We need to fix the undefs list for any syms we have twiddled to
4221 undef_weak. */
4222 if (htab->twiddled_syms)
4223 {
4224 bfd_link_repair_undef_list (&htab->elf.root);
4225 htab->twiddled_syms = 0;
4226 }
4227 return data.ok;
4228 }
4229
4230 static bfd_boolean
4231 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4232 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4233 {
4234 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4235 char *local_got_tls_masks;
4236
4237 if (local_got_ents == NULL)
4238 {
4239 bfd_size_type size = symtab_hdr->sh_info;
4240
4241 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4242 local_got_ents = bfd_zalloc (abfd, size);
4243 if (local_got_ents == NULL)
4244 return FALSE;
4245 elf_local_got_ents (abfd) = local_got_ents;
4246 }
4247
4248 if ((tls_type & TLS_EXPLICIT) == 0)
4249 {
4250 struct got_entry *ent;
4251
4252 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4253 if (ent->addend == r_addend
4254 && ent->owner == abfd
4255 && ent->tls_type == tls_type)
4256 break;
4257 if (ent == NULL)
4258 {
4259 bfd_size_type amt = sizeof (*ent);
4260 ent = bfd_alloc (abfd, amt);
4261 if (ent == NULL)
4262 return FALSE;
4263 ent->next = local_got_ents[r_symndx];
4264 ent->addend = r_addend;
4265 ent->owner = abfd;
4266 ent->tls_type = tls_type;
4267 ent->got.refcount = 0;
4268 local_got_ents[r_symndx] = ent;
4269 }
4270 ent->got.refcount += 1;
4271 }
4272
4273 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4274 local_got_tls_masks[r_symndx] |= tls_type;
4275 return TRUE;
4276 }
4277
4278 static bfd_boolean
4279 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4280 {
4281 struct plt_entry *ent;
4282
4283 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4284 if (ent->addend == addend)
4285 break;
4286 if (ent == NULL)
4287 {
4288 bfd_size_type amt = sizeof (*ent);
4289 ent = bfd_alloc (abfd, amt);
4290 if (ent == NULL)
4291 return FALSE;
4292 ent->next = eh->elf.plt.plist;
4293 ent->addend = addend;
4294 ent->plt.refcount = 0;
4295 eh->elf.plt.plist = ent;
4296 }
4297 ent->plt.refcount += 1;
4298 eh->elf.needs_plt = 1;
4299 if (eh->elf.root.root.string[0] == '.'
4300 && eh->elf.root.root.string[1] != '\0')
4301 eh->is_func = 1;
4302 return TRUE;
4303 }
4304
4305 /* Look through the relocs for a section during the first phase, and
4306 calculate needed space in the global offset table, procedure
4307 linkage table, and dynamic reloc sections. */
4308
4309 static bfd_boolean
4310 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4311 asection *sec, const Elf_Internal_Rela *relocs)
4312 {
4313 struct ppc_link_hash_table *htab;
4314 Elf_Internal_Shdr *symtab_hdr;
4315 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4316 const Elf_Internal_Rela *rel;
4317 const Elf_Internal_Rela *rel_end;
4318 asection *sreloc;
4319 asection **opd_sym_map;
4320
4321 if (info->relocatable)
4322 return TRUE;
4323
4324 /* Don't do anything special with non-loaded, non-alloced sections.
4325 In particular, any relocs in such sections should not affect GOT
4326 and PLT reference counting (ie. we don't allow them to create GOT
4327 or PLT entries), there's no possibility or desire to optimize TLS
4328 relocs, and there's not much point in propagating relocs to shared
4329 libs that the dynamic linker won't relocate. */
4330 if ((sec->flags & SEC_ALLOC) == 0)
4331 return TRUE;
4332
4333 htab = ppc_hash_table (info);
4334 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4335
4336 sym_hashes = elf_sym_hashes (abfd);
4337 sym_hashes_end = (sym_hashes
4338 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4339 - symtab_hdr->sh_info);
4340
4341 sreloc = NULL;
4342 opd_sym_map = NULL;
4343 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4344 {
4345 /* Garbage collection needs some extra help with .opd sections.
4346 We don't want to necessarily keep everything referenced by
4347 relocs in .opd, as that would keep all functions. Instead,
4348 if we reference an .opd symbol (a function descriptor), we
4349 want to keep the function code symbol's section. This is
4350 easy for global symbols, but for local syms we need to keep
4351 information about the associated function section. Later, if
4352 edit_opd deletes entries, we'll use this array to adjust
4353 local syms in .opd. */
4354 union opd_info {
4355 asection *func_section;
4356 long entry_adjust;
4357 };
4358 bfd_size_type amt;
4359
4360 amt = sec->size * sizeof (union opd_info) / 8;
4361 opd_sym_map = bfd_zalloc (abfd, amt);
4362 if (opd_sym_map == NULL)
4363 return FALSE;
4364 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4365 }
4366
4367 if (htab->sfpr == NULL
4368 && !create_linkage_sections (htab->elf.dynobj, info))
4369 return FALSE;
4370
4371 rel_end = relocs + sec->reloc_count;
4372 for (rel = relocs; rel < rel_end; rel++)
4373 {
4374 unsigned long r_symndx;
4375 struct elf_link_hash_entry *h;
4376 enum elf_ppc64_reloc_type r_type;
4377 int tls_type = 0;
4378
4379 r_symndx = ELF64_R_SYM (rel->r_info);
4380 if (r_symndx < symtab_hdr->sh_info)
4381 h = NULL;
4382 else
4383 {
4384 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4385 while (h->root.type == bfd_link_hash_indirect
4386 || h->root.type == bfd_link_hash_warning)
4387 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4388 }
4389
4390 r_type = ELF64_R_TYPE (rel->r_info);
4391 switch (r_type)
4392 {
4393 case R_PPC64_GOT_TLSLD16:
4394 case R_PPC64_GOT_TLSLD16_LO:
4395 case R_PPC64_GOT_TLSLD16_HI:
4396 case R_PPC64_GOT_TLSLD16_HA:
4397 ppc64_tlsld_got (abfd)->refcount += 1;
4398 tls_type = TLS_TLS | TLS_LD;
4399 goto dogottls;
4400
4401 case R_PPC64_GOT_TLSGD16:
4402 case R_PPC64_GOT_TLSGD16_LO:
4403 case R_PPC64_GOT_TLSGD16_HI:
4404 case R_PPC64_GOT_TLSGD16_HA:
4405 tls_type = TLS_TLS | TLS_GD;
4406 goto dogottls;
4407
4408 case R_PPC64_GOT_TPREL16_DS:
4409 case R_PPC64_GOT_TPREL16_LO_DS:
4410 case R_PPC64_GOT_TPREL16_HI:
4411 case R_PPC64_GOT_TPREL16_HA:
4412 if (info->shared)
4413 info->flags |= DF_STATIC_TLS;
4414 tls_type = TLS_TLS | TLS_TPREL;
4415 goto dogottls;
4416
4417 case R_PPC64_GOT_DTPREL16_DS:
4418 case R_PPC64_GOT_DTPREL16_LO_DS:
4419 case R_PPC64_GOT_DTPREL16_HI:
4420 case R_PPC64_GOT_DTPREL16_HA:
4421 tls_type = TLS_TLS | TLS_DTPREL;
4422 dogottls:
4423 sec->has_tls_reloc = 1;
4424 /* Fall thru */
4425
4426 case R_PPC64_GOT16:
4427 case R_PPC64_GOT16_DS:
4428 case R_PPC64_GOT16_HA:
4429 case R_PPC64_GOT16_HI:
4430 case R_PPC64_GOT16_LO:
4431 case R_PPC64_GOT16_LO_DS:
4432 /* This symbol requires a global offset table entry. */
4433 sec->has_toc_reloc = 1;
4434 if (ppc64_elf_tdata (abfd)->got == NULL
4435 && !create_got_section (abfd, info))
4436 return FALSE;
4437
4438 if (h != NULL)
4439 {
4440 struct ppc_link_hash_entry *eh;
4441 struct got_entry *ent;
4442
4443 eh = (struct ppc_link_hash_entry *) h;
4444 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4445 if (ent->addend == rel->r_addend
4446 && ent->owner == abfd
4447 && ent->tls_type == tls_type)
4448 break;
4449 if (ent == NULL)
4450 {
4451 bfd_size_type amt = sizeof (*ent);
4452 ent = bfd_alloc (abfd, amt);
4453 if (ent == NULL)
4454 return FALSE;
4455 ent->next = eh->elf.got.glist;
4456 ent->addend = rel->r_addend;
4457 ent->owner = abfd;
4458 ent->tls_type = tls_type;
4459 ent->got.refcount = 0;
4460 eh->elf.got.glist = ent;
4461 }
4462 ent->got.refcount += 1;
4463 eh->tls_mask |= tls_type;
4464 }
4465 else
4466 /* This is a global offset table entry for a local symbol. */
4467 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4468 rel->r_addend, tls_type))
4469 return FALSE;
4470 break;
4471
4472 case R_PPC64_PLT16_HA:
4473 case R_PPC64_PLT16_HI:
4474 case R_PPC64_PLT16_LO:
4475 case R_PPC64_PLT32:
4476 case R_PPC64_PLT64:
4477 /* This symbol requires a procedure linkage table entry. We
4478 actually build the entry in adjust_dynamic_symbol,
4479 because this might be a case of linking PIC code without
4480 linking in any dynamic objects, in which case we don't
4481 need to generate a procedure linkage table after all. */
4482 if (h == NULL)
4483 {
4484 /* It does not make sense to have a procedure linkage
4485 table entry for a local symbol. */
4486 bfd_set_error (bfd_error_bad_value);
4487 return FALSE;
4488 }
4489 else
4490 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4491 rel->r_addend))
4492 return FALSE;
4493 break;
4494
4495 /* The following relocations don't need to propagate the
4496 relocation if linking a shared object since they are
4497 section relative. */
4498 case R_PPC64_SECTOFF:
4499 case R_PPC64_SECTOFF_LO:
4500 case R_PPC64_SECTOFF_HI:
4501 case R_PPC64_SECTOFF_HA:
4502 case R_PPC64_SECTOFF_DS:
4503 case R_PPC64_SECTOFF_LO_DS:
4504 case R_PPC64_DTPREL16:
4505 case R_PPC64_DTPREL16_LO:
4506 case R_PPC64_DTPREL16_HI:
4507 case R_PPC64_DTPREL16_HA:
4508 case R_PPC64_DTPREL16_DS:
4509 case R_PPC64_DTPREL16_LO_DS:
4510 case R_PPC64_DTPREL16_HIGHER:
4511 case R_PPC64_DTPREL16_HIGHERA:
4512 case R_PPC64_DTPREL16_HIGHEST:
4513 case R_PPC64_DTPREL16_HIGHESTA:
4514 break;
4515
4516 /* Nor do these. */
4517 case R_PPC64_TOC16:
4518 case R_PPC64_TOC16_LO:
4519 case R_PPC64_TOC16_HI:
4520 case R_PPC64_TOC16_HA:
4521 case R_PPC64_TOC16_DS:
4522 case R_PPC64_TOC16_LO_DS:
4523 sec->has_toc_reloc = 1;
4524 break;
4525
4526 /* This relocation describes the C++ object vtable hierarchy.
4527 Reconstruct it for later use during GC. */
4528 case R_PPC64_GNU_VTINHERIT:
4529 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4530 return FALSE;
4531 break;
4532
4533 /* This relocation describes which C++ vtable entries are actually
4534 used. Record for later use during GC. */
4535 case R_PPC64_GNU_VTENTRY:
4536 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4537 return FALSE;
4538 break;
4539
4540 case R_PPC64_REL14:
4541 case R_PPC64_REL14_BRTAKEN:
4542 case R_PPC64_REL14_BRNTAKEN:
4543 {
4544 asection *dest = NULL;
4545
4546 /* Heuristic: If jumping outside our section, chances are
4547 we are going to need a stub. */
4548 if (h != NULL)
4549 {
4550 /* If the sym is weak it may be overridden later, so
4551 don't assume we know where a weak sym lives. */
4552 if (h->root.type == bfd_link_hash_defined)
4553 dest = h->root.u.def.section;
4554 }
4555 else
4556 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4557 sec, r_symndx);
4558 if (dest != sec)
4559 htab->has_14bit_branch = 1;
4560 }
4561 /* Fall through. */
4562
4563 case R_PPC64_REL24:
4564 if (h != NULL)
4565 {
4566 /* We may need a .plt entry if the function this reloc
4567 refers to is in a shared lib. */
4568 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4569 rel->r_addend))
4570 return FALSE;
4571 if (h == &htab->tls_get_addr->elf
4572 || h == &htab->tls_get_addr_fd->elf)
4573 sec->has_tls_reloc = 1;
4574 else if (htab->tls_get_addr == NULL
4575 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4576 && (h->root.root.string[15] == 0
4577 || h->root.root.string[15] == '@'))
4578 {
4579 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4580 sec->has_tls_reloc = 1;
4581 }
4582 else if (htab->tls_get_addr_fd == NULL
4583 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4584 && (h->root.root.string[14] == 0
4585 || h->root.root.string[14] == '@'))
4586 {
4587 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4588 sec->has_tls_reloc = 1;
4589 }
4590 }
4591 break;
4592
4593 case R_PPC64_TPREL64:
4594 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4595 if (info->shared)
4596 info->flags |= DF_STATIC_TLS;
4597 goto dotlstoc;
4598
4599 case R_PPC64_DTPMOD64:
4600 if (rel + 1 < rel_end
4601 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4602 && rel[1].r_offset == rel->r_offset + 8)
4603 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4604 else
4605 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4606 goto dotlstoc;
4607
4608 case R_PPC64_DTPREL64:
4609 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4610 if (rel != relocs
4611 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4612 && rel[-1].r_offset == rel->r_offset - 8)
4613 /* This is the second reloc of a dtpmod, dtprel pair.
4614 Don't mark with TLS_DTPREL. */
4615 goto dodyn;
4616
4617 dotlstoc:
4618 sec->has_tls_reloc = 1;
4619 if (h != NULL)
4620 {
4621 struct ppc_link_hash_entry *eh;
4622 eh = (struct ppc_link_hash_entry *) h;
4623 eh->tls_mask |= tls_type;
4624 }
4625 else
4626 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4627 rel->r_addend, tls_type))
4628 return FALSE;
4629
4630 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4631 {
4632 /* One extra to simplify get_tls_mask. */
4633 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4634 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4635 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4636 return FALSE;
4637 }
4638 BFD_ASSERT (rel->r_offset % 8 == 0);
4639 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4640
4641 /* Mark the second slot of a GD or LD entry.
4642 -1 to indicate GD and -2 to indicate LD. */
4643 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4644 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4645 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4646 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4647 goto dodyn;
4648
4649 case R_PPC64_TPREL16:
4650 case R_PPC64_TPREL16_LO:
4651 case R_PPC64_TPREL16_HI:
4652 case R_PPC64_TPREL16_HA:
4653 case R_PPC64_TPREL16_DS:
4654 case R_PPC64_TPREL16_LO_DS:
4655 case R_PPC64_TPREL16_HIGHER:
4656 case R_PPC64_TPREL16_HIGHERA:
4657 case R_PPC64_TPREL16_HIGHEST:
4658 case R_PPC64_TPREL16_HIGHESTA:
4659 if (info->shared)
4660 {
4661 info->flags |= DF_STATIC_TLS;
4662 goto dodyn;
4663 }
4664 break;
4665
4666 case R_PPC64_ADDR64:
4667 if (opd_sym_map != NULL
4668 && rel + 1 < rel_end
4669 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4670 {
4671 if (h != NULL)
4672 {
4673 if (h->root.root.string[0] == '.'
4674 && h->root.root.string[1] != 0
4675 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4676 ;
4677 else
4678 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4679 }
4680 else
4681 {
4682 asection *s;
4683
4684 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4685 r_symndx);
4686 if (s == NULL)
4687 return FALSE;
4688 else if (s != sec)
4689 opd_sym_map[rel->r_offset / 8] = s;
4690 }
4691 }
4692 /* Fall through. */
4693
4694 case R_PPC64_REL30:
4695 case R_PPC64_REL32:
4696 case R_PPC64_REL64:
4697 case R_PPC64_ADDR14:
4698 case R_PPC64_ADDR14_BRNTAKEN:
4699 case R_PPC64_ADDR14_BRTAKEN:
4700 case R_PPC64_ADDR16:
4701 case R_PPC64_ADDR16_DS:
4702 case R_PPC64_ADDR16_HA:
4703 case R_PPC64_ADDR16_HI:
4704 case R_PPC64_ADDR16_HIGHER:
4705 case R_PPC64_ADDR16_HIGHERA:
4706 case R_PPC64_ADDR16_HIGHEST:
4707 case R_PPC64_ADDR16_HIGHESTA:
4708 case R_PPC64_ADDR16_LO:
4709 case R_PPC64_ADDR16_LO_DS:
4710 case R_PPC64_ADDR24:
4711 case R_PPC64_ADDR32:
4712 case R_PPC64_UADDR16:
4713 case R_PPC64_UADDR32:
4714 case R_PPC64_UADDR64:
4715 case R_PPC64_TOC:
4716 if (h != NULL && !info->shared)
4717 /* We may need a copy reloc. */
4718 h->non_got_ref = 1;
4719
4720 /* Don't propagate .opd relocs. */
4721 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4722 break;
4723
4724 /* If we are creating a shared library, and this is a reloc
4725 against a global symbol, or a non PC relative reloc
4726 against a local symbol, then we need to copy the reloc
4727 into the shared library. However, if we are linking with
4728 -Bsymbolic, we do not need to copy a reloc against a
4729 global symbol which is defined in an object we are
4730 including in the link (i.e., DEF_REGULAR is set). At
4731 this point we have not seen all the input files, so it is
4732 possible that DEF_REGULAR is not set now but will be set
4733 later (it is never cleared). In case of a weak definition,
4734 DEF_REGULAR may be cleared later by a strong definition in
4735 a shared library. We account for that possibility below by
4736 storing information in the dyn_relocs field of the hash
4737 table entry. A similar situation occurs when creating
4738 shared libraries and symbol visibility changes render the
4739 symbol local.
4740
4741 If on the other hand, we are creating an executable, we
4742 may need to keep relocations for symbols satisfied by a
4743 dynamic library if we manage to avoid copy relocs for the
4744 symbol. */
4745 dodyn:
4746 if ((info->shared
4747 && (MUST_BE_DYN_RELOC (r_type)
4748 || (h != NULL
4749 && (! info->symbolic
4750 || h->root.type == bfd_link_hash_defweak
4751 || !h->def_regular))))
4752 || (ELIMINATE_COPY_RELOCS
4753 && !info->shared
4754 && h != NULL
4755 && (h->root.type == bfd_link_hash_defweak
4756 || !h->def_regular)))
4757 {
4758 struct ppc_dyn_relocs *p;
4759 struct ppc_dyn_relocs **head;
4760
4761 /* We must copy these reloc types into the output file.
4762 Create a reloc section in dynobj and make room for
4763 this reloc. */
4764 if (sreloc == NULL)
4765 {
4766 const char *name;
4767 bfd *dynobj;
4768
4769 name = (bfd_elf_string_from_elf_section
4770 (abfd,
4771 elf_elfheader (abfd)->e_shstrndx,
4772 elf_section_data (sec)->rel_hdr.sh_name));
4773 if (name == NULL)
4774 return FALSE;
4775
4776 if (strncmp (name, ".rela", 5) != 0
4777 || strcmp (bfd_get_section_name (abfd, sec),
4778 name + 5) != 0)
4779 {
4780 (*_bfd_error_handler)
4781 (_("%B: bad relocation section name `%s\'"),
4782 abfd, name);
4783 bfd_set_error (bfd_error_bad_value);
4784 }
4785
4786 dynobj = htab->elf.dynobj;
4787 sreloc = bfd_get_section_by_name (dynobj, name);
4788 if (sreloc == NULL)
4789 {
4790 flagword flags;
4791
4792 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4793 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4794 | SEC_ALLOC | SEC_LOAD);
4795 sreloc = bfd_make_section_with_flags (dynobj,
4796 name,
4797 flags);
4798 if (sreloc == NULL
4799 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4800 return FALSE;
4801 }
4802 elf_section_data (sec)->sreloc = sreloc;
4803 }
4804
4805 /* If this is a global symbol, we count the number of
4806 relocations we need for this symbol. */
4807 if (h != NULL)
4808 {
4809 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4810 }
4811 else
4812 {
4813 /* Track dynamic relocs needed for local syms too.
4814 We really need local syms available to do this
4815 easily. Oh well. */
4816
4817 asection *s;
4818 void *vpp;
4819
4820 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4821 sec, r_symndx);
4822 if (s == NULL)
4823 return FALSE;
4824
4825 vpp = &elf_section_data (s)->local_dynrel;
4826 head = (struct ppc_dyn_relocs **) vpp;
4827 }
4828
4829 p = *head;
4830 if (p == NULL || p->sec != sec)
4831 {
4832 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4833 if (p == NULL)
4834 return FALSE;
4835 p->next = *head;
4836 *head = p;
4837 p->sec = sec;
4838 p->count = 0;
4839 p->pc_count = 0;
4840 }
4841
4842 p->count += 1;
4843 if (!MUST_BE_DYN_RELOC (r_type))
4844 p->pc_count += 1;
4845 }
4846 break;
4847
4848 default:
4849 break;
4850 }
4851 }
4852
4853 return TRUE;
4854 }
4855
4856 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4857 of the code entry point, and its section. */
4858
4859 static bfd_vma
4860 opd_entry_value (asection *opd_sec,
4861 bfd_vma offset,
4862 asection **code_sec,
4863 bfd_vma *code_off)
4864 {
4865 bfd *opd_bfd = opd_sec->owner;
4866 Elf_Internal_Rela *relocs;
4867 Elf_Internal_Rela *lo, *hi, *look;
4868 bfd_vma val;
4869
4870 /* No relocs implies we are linking a --just-symbols object. */
4871 if (opd_sec->reloc_count == 0)
4872 {
4873 bfd_vma val;
4874
4875 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4876 return (bfd_vma) -1;
4877
4878 if (code_sec != NULL)
4879 {
4880 asection *sec, *likely = NULL;
4881 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4882 if (sec->vma <= val
4883 && (sec->flags & SEC_LOAD) != 0
4884 && (sec->flags & SEC_ALLOC) != 0)
4885 likely = sec;
4886 if (likely != NULL)
4887 {
4888 *code_sec = likely;
4889 if (code_off != NULL)
4890 *code_off = val - likely->vma;
4891 }
4892 }
4893 return val;
4894 }
4895
4896 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4897 if (relocs == NULL)
4898 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4899
4900 /* Go find the opd reloc at the sym address. */
4901 lo = relocs;
4902 BFD_ASSERT (lo != NULL);
4903 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4904 val = (bfd_vma) -1;
4905 while (lo < hi)
4906 {
4907 look = lo + (hi - lo) / 2;
4908 if (look->r_offset < offset)
4909 lo = look + 1;
4910 else if (look->r_offset > offset)
4911 hi = look;
4912 else
4913 {
4914 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4915 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4916 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4917 {
4918 unsigned long symndx = ELF64_R_SYM (look->r_info);
4919 asection *sec;
4920
4921 if (symndx < symtab_hdr->sh_info)
4922 {
4923 Elf_Internal_Sym *sym;
4924
4925 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4926 if (sym == NULL)
4927 {
4928 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4929 symtab_hdr->sh_info,
4930 0, NULL, NULL, NULL);
4931 if (sym == NULL)
4932 break;
4933 symtab_hdr->contents = (bfd_byte *) sym;
4934 }
4935
4936 sym += symndx;
4937 val = sym->st_value;
4938 sec = NULL;
4939 if ((sym->st_shndx != SHN_UNDEF
4940 && sym->st_shndx < SHN_LORESERVE)
4941 || sym->st_shndx > SHN_HIRESERVE)
4942 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4943 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4944 }
4945 else
4946 {
4947 struct elf_link_hash_entry **sym_hashes;
4948 struct elf_link_hash_entry *rh;
4949
4950 sym_hashes = elf_sym_hashes (opd_bfd);
4951 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4952 while (rh->root.type == bfd_link_hash_indirect
4953 || rh->root.type == bfd_link_hash_warning)
4954 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4955 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4956 || rh->root.type == bfd_link_hash_defweak);
4957 val = rh->root.u.def.value;
4958 sec = rh->root.u.def.section;
4959 }
4960 val += look->r_addend;
4961 if (code_off != NULL)
4962 *code_off = val;
4963 if (code_sec != NULL)
4964 *code_sec = sec;
4965 if (sec != NULL && sec->output_section != NULL)
4966 val += sec->output_section->vma + sec->output_offset;
4967 }
4968 break;
4969 }
4970 }
4971
4972 return val;
4973 }
4974
4975 /* Mark sections containing dynamically referenced symbols. When
4976 building shared libraries, we must assume that any visible symbol is
4977 referenced. */
4978
4979 static bfd_boolean
4980 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
4981 {
4982 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4983 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
4984
4985 if (eh->elf.root.type == bfd_link_hash_warning)
4986 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4987
4988 /* Dynamic linking info is on the func descriptor sym. */
4989 if (eh->oh != NULL
4990 && eh->oh->is_func_descriptor
4991 && (eh->oh->elf.root.type == bfd_link_hash_defined
4992 || eh->oh->elf.root.type == bfd_link_hash_defweak))
4993 eh = eh->oh;
4994
4995 if ((eh->elf.root.type == bfd_link_hash_defined
4996 || eh->elf.root.type == bfd_link_hash_defweak)
4997 && (eh->elf.ref_dynamic
4998 || (!info->executable
4999 && eh->elf.def_regular
5000 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5001 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5002 {
5003 asection *code_sec;
5004
5005 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5006
5007 /* Function descriptor syms cause the associated
5008 function code sym section to be marked. */
5009 if (eh->is_func_descriptor
5010 && (eh->oh->elf.root.type == bfd_link_hash_defined
5011 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5012 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5013 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5014 && opd_entry_value (eh->elf.root.u.def.section,
5015 eh->elf.root.u.def.value,
5016 &code_sec, NULL) != (bfd_vma) -1)
5017 code_sec->flags |= SEC_KEEP;
5018 }
5019
5020 return TRUE;
5021 }
5022
5023 /* Return the section that should be marked against GC for a given
5024 relocation. */
5025
5026 static asection *
5027 ppc64_elf_gc_mark_hook (asection *sec,
5028 struct bfd_link_info *info,
5029 Elf_Internal_Rela *rel,
5030 struct elf_link_hash_entry *h,
5031 Elf_Internal_Sym *sym)
5032 {
5033 asection *rsec;
5034
5035 /* First mark all our entry sym sections. */
5036 if (info->gc_sym_list != NULL)
5037 {
5038 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5039 struct bfd_sym_chain *sym = info->gc_sym_list;
5040
5041 info->gc_sym_list = NULL;
5042 for (; sym != NULL; sym = sym->next)
5043 {
5044 struct ppc_link_hash_entry *eh;
5045
5046 eh = (struct ppc_link_hash_entry *)
5047 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5048 if (eh == NULL)
5049 continue;
5050 if (eh->elf.root.type != bfd_link_hash_defined
5051 && eh->elf.root.type != bfd_link_hash_defweak)
5052 continue;
5053
5054 if (eh->is_func_descriptor
5055 && (eh->oh->elf.root.type == bfd_link_hash_defined
5056 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5057 rsec = eh->oh->elf.root.u.def.section;
5058 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5059 && opd_entry_value (eh->elf.root.u.def.section,
5060 eh->elf.root.u.def.value,
5061 &rsec, NULL) != (bfd_vma) -1)
5062 ;
5063 else
5064 continue;
5065
5066 if (!rsec->gc_mark)
5067 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5068
5069 rsec = eh->elf.root.u.def.section;
5070 if (!rsec->gc_mark)
5071 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5072 }
5073 }
5074
5075 /* Syms return NULL if we're marking .opd, so we avoid marking all
5076 function sections, as all functions are referenced in .opd. */
5077 rsec = NULL;
5078 if (get_opd_info (sec) != NULL)
5079 return rsec;
5080
5081 if (h != NULL)
5082 {
5083 enum elf_ppc64_reloc_type r_type;
5084 struct ppc_link_hash_entry *eh;
5085
5086 r_type = ELF64_R_TYPE (rel->r_info);
5087 switch (r_type)
5088 {
5089 case R_PPC64_GNU_VTINHERIT:
5090 case R_PPC64_GNU_VTENTRY:
5091 break;
5092
5093 default:
5094 switch (h->root.type)
5095 {
5096 case bfd_link_hash_defined:
5097 case bfd_link_hash_defweak:
5098 eh = (struct ppc_link_hash_entry *) h;
5099 if (eh->oh != NULL
5100 && eh->oh->is_func_descriptor
5101 && (eh->oh->elf.root.type == bfd_link_hash_defined
5102 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5103 eh = eh->oh;
5104
5105 /* Function descriptor syms cause the associated
5106 function code sym section to be marked. */
5107 if (eh->is_func_descriptor
5108 && (eh->oh->elf.root.type == bfd_link_hash_defined
5109 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5110 {
5111 /* They also mark their opd section. */
5112 if (!eh->elf.root.u.def.section->gc_mark)
5113 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5114 ppc64_elf_gc_mark_hook);
5115
5116 rsec = eh->oh->elf.root.u.def.section;
5117 }
5118 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5119 && opd_entry_value (eh->elf.root.u.def.section,
5120 eh->elf.root.u.def.value,
5121 &rsec, NULL) != (bfd_vma) -1)
5122 {
5123 if (!eh->elf.root.u.def.section->gc_mark)
5124 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
5125 ppc64_elf_gc_mark_hook);
5126 }
5127 else
5128 rsec = h->root.u.def.section;
5129 break;
5130
5131 case bfd_link_hash_common:
5132 rsec = h->root.u.c.p->section;
5133 break;
5134
5135 default:
5136 break;
5137 }
5138 }
5139 }
5140 else
5141 {
5142 asection **opd_sym_section;
5143
5144 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5145 opd_sym_section = get_opd_info (rsec);
5146 if (opd_sym_section != NULL)
5147 {
5148 if (!rsec->gc_mark)
5149 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
5150
5151 rsec = opd_sym_section[(sym->st_value + rel->r_addend) / 8];
5152 }
5153 }
5154
5155 return rsec;
5156 }
5157
5158 /* Update the .got, .plt. and dynamic reloc reference counts for the
5159 section being removed. */
5160
5161 static bfd_boolean
5162 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5163 asection *sec, const Elf_Internal_Rela *relocs)
5164 {
5165 struct ppc_link_hash_table *htab;
5166 Elf_Internal_Shdr *symtab_hdr;
5167 struct elf_link_hash_entry **sym_hashes;
5168 struct got_entry **local_got_ents;
5169 const Elf_Internal_Rela *rel, *relend;
5170
5171 if ((sec->flags & SEC_ALLOC) == 0)
5172 return TRUE;
5173
5174 elf_section_data (sec)->local_dynrel = NULL;
5175
5176 htab = ppc_hash_table (info);
5177 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5178 sym_hashes = elf_sym_hashes (abfd);
5179 local_got_ents = elf_local_got_ents (abfd);
5180
5181 relend = relocs + sec->reloc_count;
5182 for (rel = relocs; rel < relend; rel++)
5183 {
5184 unsigned long r_symndx;
5185 enum elf_ppc64_reloc_type r_type;
5186 struct elf_link_hash_entry *h = NULL;
5187 char tls_type = 0;
5188
5189 r_symndx = ELF64_R_SYM (rel->r_info);
5190 r_type = ELF64_R_TYPE (rel->r_info);
5191 if (r_symndx >= symtab_hdr->sh_info)
5192 {
5193 struct ppc_link_hash_entry *eh;
5194 struct ppc_dyn_relocs **pp;
5195 struct ppc_dyn_relocs *p;
5196
5197 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5198 while (h->root.type == bfd_link_hash_indirect
5199 || h->root.type == bfd_link_hash_warning)
5200 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5201 eh = (struct ppc_link_hash_entry *) h;
5202
5203 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5204 if (p->sec == sec)
5205 {
5206 /* Everything must go for SEC. */
5207 *pp = p->next;
5208 break;
5209 }
5210 }
5211
5212 switch (r_type)
5213 {
5214 case R_PPC64_GOT_TLSLD16:
5215 case R_PPC64_GOT_TLSLD16_LO:
5216 case R_PPC64_GOT_TLSLD16_HI:
5217 case R_PPC64_GOT_TLSLD16_HA:
5218 ppc64_tlsld_got (abfd)->refcount -= 1;
5219 tls_type = TLS_TLS | TLS_LD;
5220 goto dogot;
5221
5222 case R_PPC64_GOT_TLSGD16:
5223 case R_PPC64_GOT_TLSGD16_LO:
5224 case R_PPC64_GOT_TLSGD16_HI:
5225 case R_PPC64_GOT_TLSGD16_HA:
5226 tls_type = TLS_TLS | TLS_GD;
5227 goto dogot;
5228
5229 case R_PPC64_GOT_TPREL16_DS:
5230 case R_PPC64_GOT_TPREL16_LO_DS:
5231 case R_PPC64_GOT_TPREL16_HI:
5232 case R_PPC64_GOT_TPREL16_HA:
5233 tls_type = TLS_TLS | TLS_TPREL;
5234 goto dogot;
5235
5236 case R_PPC64_GOT_DTPREL16_DS:
5237 case R_PPC64_GOT_DTPREL16_LO_DS:
5238 case R_PPC64_GOT_DTPREL16_HI:
5239 case R_PPC64_GOT_DTPREL16_HA:
5240 tls_type = TLS_TLS | TLS_DTPREL;
5241 goto dogot;
5242
5243 case R_PPC64_GOT16:
5244 case R_PPC64_GOT16_DS:
5245 case R_PPC64_GOT16_HA:
5246 case R_PPC64_GOT16_HI:
5247 case R_PPC64_GOT16_LO:
5248 case R_PPC64_GOT16_LO_DS:
5249 dogot:
5250 {
5251 struct got_entry *ent;
5252
5253 if (h != NULL)
5254 ent = h->got.glist;
5255 else
5256 ent = local_got_ents[r_symndx];
5257
5258 for (; ent != NULL; ent = ent->next)
5259 if (ent->addend == rel->r_addend
5260 && ent->owner == abfd
5261 && ent->tls_type == tls_type)
5262 break;
5263 if (ent == NULL)
5264 abort ();
5265 if (ent->got.refcount > 0)
5266 ent->got.refcount -= 1;
5267 }
5268 break;
5269
5270 case R_PPC64_PLT16_HA:
5271 case R_PPC64_PLT16_HI:
5272 case R_PPC64_PLT16_LO:
5273 case R_PPC64_PLT32:
5274 case R_PPC64_PLT64:
5275 case R_PPC64_REL14:
5276 case R_PPC64_REL14_BRNTAKEN:
5277 case R_PPC64_REL14_BRTAKEN:
5278 case R_PPC64_REL24:
5279 if (h != NULL)
5280 {
5281 struct plt_entry *ent;
5282
5283 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5284 if (ent->addend == rel->r_addend)
5285 break;
5286 if (ent == NULL)
5287 abort ();
5288 if (ent->plt.refcount > 0)
5289 ent->plt.refcount -= 1;
5290 }
5291 break;
5292
5293 default:
5294 break;
5295 }
5296 }
5297 return TRUE;
5298 }
5299
5300 /* The maximum size of .sfpr. */
5301 #define SFPR_MAX (218*4)
5302
5303 struct sfpr_def_parms
5304 {
5305 const char name[12];
5306 unsigned char lo, hi;
5307 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5308 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5309 };
5310
5311 /* Auto-generate _save*, _rest* functions in .sfpr. */
5312
5313 static unsigned int
5314 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5315 {
5316 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5317 unsigned int i;
5318 size_t len = strlen (parm->name);
5319 bfd_boolean writing = FALSE;
5320 char sym[16];
5321
5322 memcpy (sym, parm->name, len);
5323 sym[len + 2] = 0;
5324
5325 for (i = parm->lo; i <= parm->hi; i++)
5326 {
5327 struct elf_link_hash_entry *h;
5328
5329 sym[len + 0] = i / 10 + '0';
5330 sym[len + 1] = i % 10 + '0';
5331 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5332 if (h != NULL
5333 && !h->def_regular)
5334 {
5335 h->root.type = bfd_link_hash_defined;
5336 h->root.u.def.section = htab->sfpr;
5337 h->root.u.def.value = htab->sfpr->size;
5338 h->type = STT_FUNC;
5339 h->def_regular = 1;
5340 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5341 writing = TRUE;
5342 if (htab->sfpr->contents == NULL)
5343 {
5344 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5345 if (htab->sfpr->contents == NULL)
5346 return FALSE;
5347 }
5348 }
5349 if (writing)
5350 {
5351 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5352 if (i != parm->hi)
5353 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5354 else
5355 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5356 htab->sfpr->size = p - htab->sfpr->contents;
5357 }
5358 }
5359
5360 return TRUE;
5361 }
5362
5363 static bfd_byte *
5364 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5365 {
5366 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5367 return p + 4;
5368 }
5369
5370 static bfd_byte *
5371 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5372 {
5373 p = savegpr0 (abfd, p, r);
5374 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5375 p = p + 4;
5376 bfd_put_32 (abfd, BLR, p);
5377 return p + 4;
5378 }
5379
5380 static bfd_byte *
5381 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5382 {
5383 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5384 return p + 4;
5385 }
5386
5387 static bfd_byte *
5388 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5389 {
5390 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5391 p = p + 4;
5392 p = restgpr0 (abfd, p, r);
5393 bfd_put_32 (abfd, MTLR_R0, p);
5394 p = p + 4;
5395 if (r == 29)
5396 {
5397 p = restgpr0 (abfd, p, 30);
5398 p = restgpr0 (abfd, p, 31);
5399 }
5400 bfd_put_32 (abfd, BLR, p);
5401 return p + 4;
5402 }
5403
5404 static bfd_byte *
5405 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5406 {
5407 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5408 return p + 4;
5409 }
5410
5411 static bfd_byte *
5412 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5413 {
5414 p = savegpr1 (abfd, p, r);
5415 bfd_put_32 (abfd, BLR, p);
5416 return p + 4;
5417 }
5418
5419 static bfd_byte *
5420 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5421 {
5422 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5423 return p + 4;
5424 }
5425
5426 static bfd_byte *
5427 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5428 {
5429 p = restgpr1 (abfd, p, r);
5430 bfd_put_32 (abfd, BLR, p);
5431 return p + 4;
5432 }
5433
5434 static bfd_byte *
5435 savefpr (bfd *abfd, bfd_byte *p, int r)
5436 {
5437 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5438 return p + 4;
5439 }
5440
5441 static bfd_byte *
5442 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5443 {
5444 p = savefpr (abfd, p, r);
5445 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5446 p = p + 4;
5447 bfd_put_32 (abfd, BLR, p);
5448 return p + 4;
5449 }
5450
5451 static bfd_byte *
5452 restfpr (bfd *abfd, bfd_byte *p, int r)
5453 {
5454 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5455 return p + 4;
5456 }
5457
5458 static bfd_byte *
5459 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5460 {
5461 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5462 p = p + 4;
5463 p = restfpr (abfd, p, r);
5464 bfd_put_32 (abfd, MTLR_R0, p);
5465 p = p + 4;
5466 if (r == 29)
5467 {
5468 p = restfpr (abfd, p, 30);
5469 p = restfpr (abfd, p, 31);
5470 }
5471 bfd_put_32 (abfd, BLR, p);
5472 return p + 4;
5473 }
5474
5475 static bfd_byte *
5476 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5477 {
5478 p = savefpr (abfd, p, r);
5479 bfd_put_32 (abfd, BLR, p);
5480 return p + 4;
5481 }
5482
5483 static bfd_byte *
5484 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5485 {
5486 p = restfpr (abfd, p, r);
5487 bfd_put_32 (abfd, BLR, p);
5488 return p + 4;
5489 }
5490
5491 static bfd_byte *
5492 savevr (bfd *abfd, bfd_byte *p, int r)
5493 {
5494 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5495 p = p + 4;
5496 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5497 return p + 4;
5498 }
5499
5500 static bfd_byte *
5501 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5502 {
5503 p = savevr (abfd, p, r);
5504 bfd_put_32 (abfd, BLR, p);
5505 return p + 4;
5506 }
5507
5508 static bfd_byte *
5509 restvr (bfd *abfd, bfd_byte *p, int r)
5510 {
5511 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5512 p = p + 4;
5513 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5514 return p + 4;
5515 }
5516
5517 static bfd_byte *
5518 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5519 {
5520 p = restvr (abfd, p, r);
5521 bfd_put_32 (abfd, BLR, p);
5522 return p + 4;
5523 }
5524
5525 /* Called via elf_link_hash_traverse to transfer dynamic linking
5526 information on function code symbol entries to their corresponding
5527 function descriptor symbol entries. */
5528
5529 static bfd_boolean
5530 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5531 {
5532 struct bfd_link_info *info;
5533 struct ppc_link_hash_table *htab;
5534 struct plt_entry *ent;
5535 struct ppc_link_hash_entry *fh;
5536 struct ppc_link_hash_entry *fdh;
5537 bfd_boolean force_local;
5538
5539 fh = (struct ppc_link_hash_entry *) h;
5540 if (fh->elf.root.type == bfd_link_hash_indirect)
5541 return TRUE;
5542
5543 if (fh->elf.root.type == bfd_link_hash_warning)
5544 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5545
5546 info = inf;
5547 htab = ppc_hash_table (info);
5548
5549 /* Resolve undefined references to dot-symbols as the value
5550 in the function descriptor, if we have one in a regular object.
5551 This is to satisfy cases like ".quad .foo". Calls to functions
5552 in dynamic objects are handled elsewhere. */
5553 if (fh->elf.root.type == bfd_link_hash_undefweak
5554 && fh->was_undefined
5555 && (fh->oh->elf.root.type == bfd_link_hash_defined
5556 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5557 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5558 && opd_entry_value (fh->oh->elf.root.u.def.section,
5559 fh->oh->elf.root.u.def.value,
5560 &fh->elf.root.u.def.section,
5561 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5562 {
5563 fh->elf.root.type = fh->oh->elf.root.type;
5564 fh->elf.forced_local = 1;
5565 }
5566
5567 /* If this is a function code symbol, transfer dynamic linking
5568 information to the function descriptor symbol. */
5569 if (!fh->is_func)
5570 return TRUE;
5571
5572 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5573 if (ent->plt.refcount > 0)
5574 break;
5575 if (ent == NULL
5576 || fh->elf.root.root.string[0] != '.'
5577 || fh->elf.root.root.string[1] == '\0')
5578 return TRUE;
5579
5580 /* Find the corresponding function descriptor symbol. Create it
5581 as undefined if necessary. */
5582
5583 fdh = get_fdh (fh, htab);
5584 if (fdh != NULL)
5585 while (fdh->elf.root.type == bfd_link_hash_indirect
5586 || fdh->elf.root.type == bfd_link_hash_warning)
5587 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5588
5589 if (fdh == NULL
5590 && info->shared
5591 && (fh->elf.root.type == bfd_link_hash_undefined
5592 || fh->elf.root.type == bfd_link_hash_undefweak))
5593 {
5594 fdh = make_fdh (info, fh);
5595 if (fdh == NULL)
5596 return FALSE;
5597 }
5598
5599 /* Fake function descriptors are made undefweak. If the function
5600 code symbol is strong undefined, make the fake sym the same.
5601 If the function code symbol is defined, then force the fake
5602 descriptor local; We can't support overriding of symbols in a
5603 shared library on a fake descriptor. */
5604
5605 if (fdh != NULL
5606 && fdh->fake
5607 && fdh->elf.root.type == bfd_link_hash_undefweak)
5608 {
5609 if (fh->elf.root.type == bfd_link_hash_undefined)
5610 {
5611 fdh->elf.root.type = bfd_link_hash_undefined;
5612 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5613 }
5614 else if (fh->elf.root.type == bfd_link_hash_defined
5615 || fh->elf.root.type == bfd_link_hash_defweak)
5616 {
5617 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5618 }
5619 }
5620
5621 if (fdh != NULL
5622 && !fdh->elf.forced_local
5623 && (info->shared
5624 || fdh->elf.def_dynamic
5625 || fdh->elf.ref_dynamic
5626 || (fdh->elf.root.type == bfd_link_hash_undefweak
5627 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5628 {
5629 if (fdh->elf.dynindx == -1)
5630 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5631 return FALSE;
5632 fdh->elf.ref_regular |= fh->elf.ref_regular;
5633 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5634 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5635 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5636 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5637 {
5638 move_plt_plist (fh, fdh);
5639 fdh->elf.needs_plt = 1;
5640 }
5641 fdh->is_func_descriptor = 1;
5642 fdh->oh = fh;
5643 fh->oh = fdh;
5644 }
5645
5646 /* Now that the info is on the function descriptor, clear the
5647 function code sym info. Any function code syms for which we
5648 don't have a definition in a regular file, we force local.
5649 This prevents a shared library from exporting syms that have
5650 been imported from another library. Function code syms that
5651 are really in the library we must leave global to prevent the
5652 linker dragging in a definition from a static library. */
5653 force_local = (!fh->elf.def_regular
5654 || fdh == NULL
5655 || !fdh->elf.def_regular
5656 || fdh->elf.forced_local);
5657 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5658
5659 return TRUE;
5660 }
5661
5662 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5663 this hook to a) provide some gcc support functions, and b) transfer
5664 dynamic linking information gathered so far on function code symbol
5665 entries, to their corresponding function descriptor symbol entries. */
5666
5667 static bfd_boolean
5668 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5669 struct bfd_link_info *info)
5670 {
5671 struct ppc_link_hash_table *htab;
5672 unsigned int i;
5673 const struct sfpr_def_parms funcs[] =
5674 {
5675 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5676 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5677 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5678 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5679 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5680 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5681 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5682 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5683 { "._savef", 14, 31, savefpr, savefpr1_tail },
5684 { "._restf", 14, 31, restfpr, restfpr1_tail },
5685 { "_savevr_", 20, 31, savevr, savevr_tail },
5686 { "_restvr_", 20, 31, restvr, restvr_tail }
5687 };
5688
5689 htab = ppc_hash_table (info);
5690 if (htab->sfpr == NULL)
5691 /* We don't have any relocs. */
5692 return TRUE;
5693
5694 /* Provide any missing _save* and _rest* functions. */
5695 htab->sfpr->size = 0;
5696 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5697 if (!sfpr_define (info, &funcs[i]))
5698 return FALSE;
5699
5700 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5701
5702 if (htab->sfpr->size == 0)
5703 htab->sfpr->flags |= SEC_EXCLUDE;
5704
5705 return TRUE;
5706 }
5707
5708 /* Adjust a symbol defined by a dynamic object and referenced by a
5709 regular object. The current definition is in some section of the
5710 dynamic object, but we're not including those sections. We have to
5711 change the definition to something the rest of the link can
5712 understand. */
5713
5714 static bfd_boolean
5715 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5716 struct elf_link_hash_entry *h)
5717 {
5718 struct ppc_link_hash_table *htab;
5719 asection *s;
5720 unsigned int power_of_two;
5721
5722 htab = ppc_hash_table (info);
5723
5724 /* Deal with function syms. */
5725 if (h->type == STT_FUNC
5726 || h->needs_plt)
5727 {
5728 /* Clear procedure linkage table information for any symbol that
5729 won't need a .plt entry. */
5730 struct plt_entry *ent;
5731 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5732 if (ent->plt.refcount > 0)
5733 break;
5734 if (ent == NULL
5735 || SYMBOL_CALLS_LOCAL (info, h)
5736 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5737 && h->root.type == bfd_link_hash_undefweak))
5738 {
5739 h->plt.plist = NULL;
5740 h->needs_plt = 0;
5741 }
5742 }
5743 else
5744 h->plt.plist = NULL;
5745
5746 /* If this is a weak symbol, and there is a real definition, the
5747 processor independent code will have arranged for us to see the
5748 real definition first, and we can just use the same value. */
5749 if (h->u.weakdef != NULL)
5750 {
5751 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5752 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5753 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5754 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5755 if (ELIMINATE_COPY_RELOCS)
5756 h->non_got_ref = h->u.weakdef->non_got_ref;
5757 return TRUE;
5758 }
5759
5760 /* If we are creating a shared library, we must presume that the
5761 only references to the symbol are via the global offset table.
5762 For such cases we need not do anything here; the relocations will
5763 be handled correctly by relocate_section. */
5764 if (info->shared)
5765 return TRUE;
5766
5767 /* If there are no references to this symbol that do not use the
5768 GOT, we don't need to generate a copy reloc. */
5769 if (!h->non_got_ref)
5770 return TRUE;
5771
5772 if (ELIMINATE_COPY_RELOCS)
5773 {
5774 struct ppc_link_hash_entry * eh;
5775 struct ppc_dyn_relocs *p;
5776
5777 eh = (struct ppc_link_hash_entry *) h;
5778 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5779 {
5780 s = p->sec->output_section;
5781 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5782 break;
5783 }
5784
5785 /* If we didn't find any dynamic relocs in read-only sections, then
5786 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5787 if (p == NULL)
5788 {
5789 h->non_got_ref = 0;
5790 return TRUE;
5791 }
5792 }
5793
5794 if (h->plt.plist != NULL)
5795 {
5796 /* We should never get here, but unfortunately there are versions
5797 of gcc out there that improperly (for this ABI) put initialized
5798 function pointers, vtable refs and suchlike in read-only
5799 sections. Allow them to proceed, but warn that this might
5800 break at runtime. */
5801 (*_bfd_error_handler)
5802 (_("copy reloc against `%s' requires lazy plt linking; "
5803 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5804 h->root.root.string);
5805 }
5806
5807 /* This is a reference to a symbol defined by a dynamic object which
5808 is not a function. */
5809
5810 if (h->size == 0)
5811 {
5812 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5813 h->root.root.string);
5814 return TRUE;
5815 }
5816
5817 /* We must allocate the symbol in our .dynbss section, which will
5818 become part of the .bss section of the executable. There will be
5819 an entry for this symbol in the .dynsym section. The dynamic
5820 object will contain position independent code, so all references
5821 from the dynamic object to this symbol will go through the global
5822 offset table. The dynamic linker will use the .dynsym entry to
5823 determine the address it must put in the global offset table, so
5824 both the dynamic object and the regular object will refer to the
5825 same memory location for the variable. */
5826
5827 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5828 to copy the initial value out of the dynamic object and into the
5829 runtime process image. We need to remember the offset into the
5830 .rela.bss section we are going to use. */
5831 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5832 {
5833 htab->relbss->size += sizeof (Elf64_External_Rela);
5834 h->needs_copy = 1;
5835 }
5836
5837 /* We need to figure out the alignment required for this symbol. I
5838 have no idea how ELF linkers handle this. */
5839 power_of_two = bfd_log2 (h->size);
5840 if (power_of_two > 4)
5841 power_of_two = 4;
5842
5843 /* Apply the required alignment. */
5844 s = htab->dynbss;
5845 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5846 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5847 {
5848 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5849 return FALSE;
5850 }
5851
5852 /* Define the symbol as being at this point in the section. */
5853 h->root.u.def.section = s;
5854 h->root.u.def.value = s->size;
5855
5856 /* Increment the section size to make room for the symbol. */
5857 s->size += h->size;
5858
5859 return TRUE;
5860 }
5861
5862 /* If given a function descriptor symbol, hide both the function code
5863 sym and the descriptor. */
5864 static void
5865 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5866 struct elf_link_hash_entry *h,
5867 bfd_boolean force_local)
5868 {
5869 struct ppc_link_hash_entry *eh;
5870 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5871
5872 eh = (struct ppc_link_hash_entry *) h;
5873 if (eh->is_func_descriptor)
5874 {
5875 struct ppc_link_hash_entry *fh = eh->oh;
5876
5877 if (fh == NULL)
5878 {
5879 const char *p, *q;
5880 struct ppc_link_hash_table *htab;
5881 char save;
5882
5883 /* We aren't supposed to use alloca in BFD because on
5884 systems which do not have alloca the version in libiberty
5885 calls xmalloc, which might cause the program to crash
5886 when it runs out of memory. This function doesn't have a
5887 return status, so there's no way to gracefully return an
5888 error. So cheat. We know that string[-1] can be safely
5889 accessed; It's either a string in an ELF string table,
5890 or allocated in an objalloc structure. */
5891
5892 p = eh->elf.root.root.string - 1;
5893 save = *p;
5894 *(char *) p = '.';
5895 htab = ppc_hash_table (info);
5896 fh = (struct ppc_link_hash_entry *)
5897 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5898 *(char *) p = save;
5899
5900 /* Unfortunately, if it so happens that the string we were
5901 looking for was allocated immediately before this string,
5902 then we overwrote the string terminator. That's the only
5903 reason the lookup should fail. */
5904 if (fh == NULL)
5905 {
5906 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5907 while (q >= eh->elf.root.root.string && *q == *p)
5908 --q, --p;
5909 if (q < eh->elf.root.root.string && *p == '.')
5910 fh = (struct ppc_link_hash_entry *)
5911 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5912 }
5913 if (fh != NULL)
5914 {
5915 eh->oh = fh;
5916 fh->oh = eh;
5917 }
5918 }
5919 if (fh != NULL)
5920 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5921 }
5922 }
5923
5924 static bfd_boolean
5925 get_sym_h (struct elf_link_hash_entry **hp,
5926 Elf_Internal_Sym **symp,
5927 asection **symsecp,
5928 char **tls_maskp,
5929 Elf_Internal_Sym **locsymsp,
5930 unsigned long r_symndx,
5931 bfd *ibfd)
5932 {
5933 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5934
5935 if (r_symndx >= symtab_hdr->sh_info)
5936 {
5937 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5938 struct elf_link_hash_entry *h;
5939
5940 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5941 while (h->root.type == bfd_link_hash_indirect
5942 || h->root.type == bfd_link_hash_warning)
5943 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5944
5945 if (hp != NULL)
5946 *hp = h;
5947
5948 if (symp != NULL)
5949 *symp = NULL;
5950
5951 if (symsecp != NULL)
5952 {
5953 asection *symsec = NULL;
5954 if (h->root.type == bfd_link_hash_defined
5955 || h->root.type == bfd_link_hash_defweak)
5956 symsec = h->root.u.def.section;
5957 *symsecp = symsec;
5958 }
5959
5960 if (tls_maskp != NULL)
5961 {
5962 struct ppc_link_hash_entry *eh;
5963
5964 eh = (struct ppc_link_hash_entry *) h;
5965 *tls_maskp = &eh->tls_mask;
5966 }
5967 }
5968 else
5969 {
5970 Elf_Internal_Sym *sym;
5971 Elf_Internal_Sym *locsyms = *locsymsp;
5972
5973 if (locsyms == NULL)
5974 {
5975 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5976 if (locsyms == NULL)
5977 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5978 symtab_hdr->sh_info,
5979 0, NULL, NULL, NULL);
5980 if (locsyms == NULL)
5981 return FALSE;
5982 *locsymsp = locsyms;
5983 }
5984 sym = locsyms + r_symndx;
5985
5986 if (hp != NULL)
5987 *hp = NULL;
5988
5989 if (symp != NULL)
5990 *symp = sym;
5991
5992 if (symsecp != NULL)
5993 {
5994 asection *symsec = NULL;
5995 if ((sym->st_shndx != SHN_UNDEF
5996 && sym->st_shndx < SHN_LORESERVE)
5997 || sym->st_shndx > SHN_HIRESERVE)
5998 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5999 *symsecp = symsec;
6000 }
6001
6002 if (tls_maskp != NULL)
6003 {
6004 struct got_entry **lgot_ents;
6005 char *tls_mask;
6006
6007 tls_mask = NULL;
6008 lgot_ents = elf_local_got_ents (ibfd);
6009 if (lgot_ents != NULL)
6010 {
6011 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6012 tls_mask = &lgot_masks[r_symndx];
6013 }
6014 *tls_maskp = tls_mask;
6015 }
6016 }
6017 return TRUE;
6018 }
6019
6020 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6021 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6022 type suitable for optimization, and 1 otherwise. */
6023
6024 static int
6025 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6026 Elf_Internal_Sym **locsymsp,
6027 const Elf_Internal_Rela *rel, bfd *ibfd)
6028 {
6029 unsigned long r_symndx;
6030 int next_r;
6031 struct elf_link_hash_entry *h;
6032 Elf_Internal_Sym *sym;
6033 asection *sec;
6034 bfd_vma off;
6035
6036 r_symndx = ELF64_R_SYM (rel->r_info);
6037 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6038 return 0;
6039
6040 if ((*tls_maskp != NULL && **tls_maskp != 0)
6041 || sec == NULL
6042 || ppc64_elf_section_data (sec)->t_symndx == NULL)
6043 return 1;
6044
6045 /* Look inside a TOC section too. */
6046 if (h != NULL)
6047 {
6048 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6049 off = h->root.u.def.value;
6050 }
6051 else
6052 off = sym->st_value;
6053 off += rel->r_addend;
6054 BFD_ASSERT (off % 8 == 0);
6055 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
6056 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
6057 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6058 return 0;
6059 if (toc_symndx != NULL)
6060 *toc_symndx = r_symndx;
6061 if ((h == NULL
6062 || ((h->root.type == bfd_link_hash_defined
6063 || h->root.type == bfd_link_hash_defweak)
6064 && !h->def_dynamic))
6065 && (next_r == -1 || next_r == -2))
6066 return 1 - next_r;
6067 return 1;
6068 }
6069
6070 /* Adjust all global syms defined in opd sections. In gcc generated
6071 code for the old ABI, these will already have been done. */
6072
6073 static bfd_boolean
6074 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6075 {
6076 struct ppc_link_hash_entry *eh;
6077 asection *sym_sec;
6078 long *opd_adjust;
6079
6080 if (h->root.type == bfd_link_hash_indirect)
6081 return TRUE;
6082
6083 if (h->root.type == bfd_link_hash_warning)
6084 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6085
6086 if (h->root.type != bfd_link_hash_defined
6087 && h->root.type != bfd_link_hash_defweak)
6088 return TRUE;
6089
6090 eh = (struct ppc_link_hash_entry *) h;
6091 if (eh->adjust_done)
6092 return TRUE;
6093
6094 sym_sec = eh->elf.root.u.def.section;
6095 opd_adjust = get_opd_info (sym_sec);
6096 if (opd_adjust != NULL)
6097 {
6098 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
6099 if (adjust == -1)
6100 {
6101 /* This entry has been deleted. */
6102 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->u.deleted_section;
6103 if (dsec == NULL)
6104 {
6105 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6106 if (elf_discarded_section (dsec))
6107 {
6108 ppc64_elf_tdata (sym_sec->owner)->u.deleted_section = dsec;
6109 break;
6110 }
6111 }
6112 eh->elf.root.u.def.value = 0;
6113 eh->elf.root.u.def.section = dsec;
6114 }
6115 else
6116 eh->elf.root.u.def.value += adjust;
6117 eh->adjust_done = 1;
6118 }
6119 return TRUE;
6120 }
6121
6122 /* Handles decrementing dynamic reloc counts for the reloc specified by
6123 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6124 have already been determined. */
6125
6126 static bfd_boolean
6127 dec_dynrel_count (bfd_vma r_info,
6128 asection *sec,
6129 struct bfd_link_info *info,
6130 Elf_Internal_Sym **local_syms,
6131 struct elf_link_hash_entry *h,
6132 asection *sym_sec)
6133 {
6134 enum elf_ppc64_reloc_type r_type;
6135 struct ppc_dyn_relocs *p;
6136 struct ppc_dyn_relocs **pp;
6137
6138 /* Can this reloc be dynamic? This switch, and later tests here
6139 should be kept in sync with the code in check_relocs. */
6140 r_type = ELF64_R_TYPE (r_info);
6141 switch (r_type)
6142 {
6143 default:
6144 return TRUE;
6145
6146 case R_PPC64_TPREL16:
6147 case R_PPC64_TPREL16_LO:
6148 case R_PPC64_TPREL16_HI:
6149 case R_PPC64_TPREL16_HA:
6150 case R_PPC64_TPREL16_DS:
6151 case R_PPC64_TPREL16_LO_DS:
6152 case R_PPC64_TPREL16_HIGHER:
6153 case R_PPC64_TPREL16_HIGHERA:
6154 case R_PPC64_TPREL16_HIGHEST:
6155 case R_PPC64_TPREL16_HIGHESTA:
6156 if (!info->shared)
6157 return TRUE;
6158
6159 case R_PPC64_TPREL64:
6160 case R_PPC64_DTPMOD64:
6161 case R_PPC64_DTPREL64:
6162 case R_PPC64_ADDR64:
6163 case R_PPC64_REL30:
6164 case R_PPC64_REL32:
6165 case R_PPC64_REL64:
6166 case R_PPC64_ADDR14:
6167 case R_PPC64_ADDR14_BRNTAKEN:
6168 case R_PPC64_ADDR14_BRTAKEN:
6169 case R_PPC64_ADDR16:
6170 case R_PPC64_ADDR16_DS:
6171 case R_PPC64_ADDR16_HA:
6172 case R_PPC64_ADDR16_HI:
6173 case R_PPC64_ADDR16_HIGHER:
6174 case R_PPC64_ADDR16_HIGHERA:
6175 case R_PPC64_ADDR16_HIGHEST:
6176 case R_PPC64_ADDR16_HIGHESTA:
6177 case R_PPC64_ADDR16_LO:
6178 case R_PPC64_ADDR16_LO_DS:
6179 case R_PPC64_ADDR24:
6180 case R_PPC64_ADDR32:
6181 case R_PPC64_UADDR16:
6182 case R_PPC64_UADDR32:
6183 case R_PPC64_UADDR64:
6184 case R_PPC64_TOC:
6185 break;
6186 }
6187
6188 if (local_syms != NULL)
6189 {
6190 unsigned long r_symndx;
6191 Elf_Internal_Sym *sym;
6192 bfd *ibfd = sec->owner;
6193
6194 r_symndx = ELF64_R_SYM (r_info);
6195 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6196 return FALSE;
6197 }
6198
6199 if ((info->shared
6200 && (MUST_BE_DYN_RELOC (r_type)
6201 || (h != NULL
6202 && (!info->symbolic
6203 || h->root.type == bfd_link_hash_defweak
6204 || !h->def_regular))))
6205 || (ELIMINATE_COPY_RELOCS
6206 && !info->shared
6207 && h != NULL
6208 && (h->root.type == bfd_link_hash_defweak
6209 || !h->def_regular)))
6210 ;
6211 else
6212 return TRUE;
6213
6214 if (h != NULL)
6215 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6216 else
6217 {
6218 if (sym_sec != NULL)
6219 {
6220 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6221 pp = (struct ppc_dyn_relocs **) vpp;
6222 }
6223 else
6224 {
6225 void *vpp = &elf_section_data (sec)->local_dynrel;
6226 pp = (struct ppc_dyn_relocs **) vpp;
6227 }
6228
6229 /* elf_gc_sweep may have already removed all dyn relocs associated
6230 with local syms for a given section. Don't report a dynreloc
6231 miscount. */
6232 if (*pp == NULL)
6233 return TRUE;
6234 }
6235
6236 while ((p = *pp) != NULL)
6237 {
6238 if (p->sec == sec)
6239 {
6240 if (!MUST_BE_DYN_RELOC (r_type))
6241 p->pc_count -= 1;
6242 p->count -= 1;
6243 if (p->count == 0)
6244 *pp = p->next;
6245 return TRUE;
6246 }
6247 pp = &p->next;
6248 }
6249
6250 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6251 sec->owner, sec);
6252 bfd_set_error (bfd_error_bad_value);
6253 return FALSE;
6254 }
6255
6256 /* Remove unused Official Procedure Descriptor entries. Currently we
6257 only remove those associated with functions in discarded link-once
6258 sections, or weakly defined functions that have been overridden. It
6259 would be possible to remove many more entries for statically linked
6260 applications. */
6261
6262 bfd_boolean
6263 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6264 bfd_boolean no_opd_opt,
6265 bfd_boolean non_overlapping)
6266 {
6267 bfd *ibfd;
6268 bfd_boolean some_edited = FALSE;
6269 asection *need_pad = NULL;
6270
6271 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6272 {
6273 asection *sec;
6274 Elf_Internal_Rela *relstart, *rel, *relend;
6275 Elf_Internal_Shdr *symtab_hdr;
6276 Elf_Internal_Sym *local_syms;
6277 struct elf_link_hash_entry **sym_hashes;
6278 bfd_vma offset;
6279 bfd_size_type amt;
6280 long *opd_adjust;
6281 bfd_boolean need_edit, add_aux_fields;
6282 bfd_size_type cnt_16b = 0;
6283
6284 sec = bfd_get_section_by_name (ibfd, ".opd");
6285 if (sec == NULL || sec->size == 0)
6286 continue;
6287
6288 amt = sec->size * sizeof (long) / 8;
6289 opd_adjust = get_opd_info (sec);
6290 if (opd_adjust == NULL)
6291 {
6292 /* check_relocs hasn't been called. Must be a ld -r link
6293 or --just-symbols object. */
6294 opd_adjust = bfd_alloc (obfd, amt);
6295 if (opd_adjust == NULL)
6296 return FALSE;
6297 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
6298 }
6299 memset (opd_adjust, 0, amt);
6300
6301 if (no_opd_opt)
6302 continue;
6303
6304 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6305 continue;
6306
6307 if (sec->output_section == bfd_abs_section_ptr)
6308 continue;
6309
6310 /* Look through the section relocs. */
6311 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6312 continue;
6313
6314 local_syms = NULL;
6315 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6316 sym_hashes = elf_sym_hashes (ibfd);
6317
6318 /* Read the relocations. */
6319 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6320 info->keep_memory);
6321 if (relstart == NULL)
6322 return FALSE;
6323
6324 /* First run through the relocs to check they are sane, and to
6325 determine whether we need to edit this opd section. */
6326 need_edit = FALSE;
6327 need_pad = sec;
6328 offset = 0;
6329 relend = relstart + sec->reloc_count;
6330 for (rel = relstart; rel < relend; )
6331 {
6332 enum elf_ppc64_reloc_type r_type;
6333 unsigned long r_symndx;
6334 asection *sym_sec;
6335 struct elf_link_hash_entry *h;
6336 Elf_Internal_Sym *sym;
6337
6338 /* .opd contains a regular array of 16 or 24 byte entries. We're
6339 only interested in the reloc pointing to a function entry
6340 point. */
6341 if (rel->r_offset != offset
6342 || rel + 1 >= relend
6343 || (rel + 1)->r_offset != offset + 8)
6344 {
6345 /* If someone messes with .opd alignment then after a
6346 "ld -r" we might have padding in the middle of .opd.
6347 Also, there's nothing to prevent someone putting
6348 something silly in .opd with the assembler. No .opd
6349 optimization for them! */
6350 broken_opd:
6351 (*_bfd_error_handler)
6352 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6353 need_edit = FALSE;
6354 break;
6355 }
6356
6357 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6358 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6359 {
6360 (*_bfd_error_handler)
6361 (_("%B: unexpected reloc type %u in .opd section"),
6362 ibfd, r_type);
6363 need_edit = FALSE;
6364 break;
6365 }
6366
6367 r_symndx = ELF64_R_SYM (rel->r_info);
6368 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6369 r_symndx, ibfd))
6370 goto error_ret;
6371
6372 if (sym_sec == NULL || sym_sec->owner == NULL)
6373 {
6374 const char *sym_name;
6375 if (h != NULL)
6376 sym_name = h->root.root.string;
6377 else
6378 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6379 sym_sec);
6380
6381 (*_bfd_error_handler)
6382 (_("%B: undefined sym `%s' in .opd section"),
6383 ibfd, sym_name);
6384 need_edit = FALSE;
6385 break;
6386 }
6387
6388 /* opd entries are always for functions defined in the
6389 current input bfd. If the symbol isn't defined in the
6390 input bfd, then we won't be using the function in this
6391 bfd; It must be defined in a linkonce section in another
6392 bfd, or is weak. It's also possible that we are
6393 discarding the function due to a linker script /DISCARD/,
6394 which we test for via the output_section. */
6395 if (sym_sec->owner != ibfd
6396 || sym_sec->output_section == bfd_abs_section_ptr)
6397 need_edit = TRUE;
6398
6399 rel += 2;
6400 if (rel == relend
6401 || (rel + 1 == relend && rel->r_offset == offset + 16))
6402 {
6403 if (sec->size == offset + 24)
6404 {
6405 need_pad = NULL;
6406 break;
6407 }
6408 if (rel == relend && sec->size == offset + 16)
6409 {
6410 cnt_16b++;
6411 break;
6412 }
6413 goto broken_opd;
6414 }
6415
6416 if (rel->r_offset == offset + 24)
6417 offset += 24;
6418 else if (rel->r_offset != offset + 16)
6419 goto broken_opd;
6420 else if (rel + 1 < relend
6421 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6422 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6423 {
6424 offset += 16;
6425 cnt_16b++;
6426 }
6427 else if (rel + 2 < relend
6428 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6429 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6430 {
6431 offset += 24;
6432 rel += 1;
6433 }
6434 else
6435 goto broken_opd;
6436 }
6437
6438 add_aux_fields = non_overlapping && cnt_16b > 0;
6439
6440 if (need_edit || add_aux_fields)
6441 {
6442 Elf_Internal_Rela *write_rel;
6443 bfd_byte *rptr, *wptr;
6444 bfd_byte *new_contents = NULL;
6445 bfd_boolean skip;
6446 long opd_ent_size;
6447
6448 /* This seems a waste of time as input .opd sections are all
6449 zeros as generated by gcc, but I suppose there's no reason
6450 this will always be so. We might start putting something in
6451 the third word of .opd entries. */
6452 if ((sec->flags & SEC_IN_MEMORY) == 0)
6453 {
6454 bfd_byte *loc;
6455 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6456 {
6457 if (loc != NULL)
6458 free (loc);
6459 error_ret:
6460 if (local_syms != NULL
6461 && symtab_hdr->contents != (unsigned char *) local_syms)
6462 free (local_syms);
6463 if (elf_section_data (sec)->relocs != relstart)
6464 free (relstart);
6465 return FALSE;
6466 }
6467 sec->contents = loc;
6468 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6469 }
6470
6471 elf_section_data (sec)->relocs = relstart;
6472
6473 new_contents = sec->contents;
6474 if (add_aux_fields)
6475 {
6476 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6477 if (new_contents == NULL)
6478 return FALSE;
6479 need_pad = FALSE;
6480 }
6481 wptr = new_contents;
6482 rptr = sec->contents;
6483
6484 write_rel = relstart;
6485 skip = FALSE;
6486 offset = 0;
6487 opd_ent_size = 0;
6488 for (rel = relstart; rel < relend; rel++)
6489 {
6490 unsigned long r_symndx;
6491 asection *sym_sec;
6492 struct elf_link_hash_entry *h;
6493 Elf_Internal_Sym *sym;
6494
6495 r_symndx = ELF64_R_SYM (rel->r_info);
6496 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6497 r_symndx, ibfd))
6498 goto error_ret;
6499
6500 if (rel->r_offset == offset)
6501 {
6502 struct ppc_link_hash_entry *fdh = NULL;
6503
6504 /* See if the .opd entry is full 24 byte or
6505 16 byte (with fd_aux entry overlapped with next
6506 fd_func). */
6507 opd_ent_size = 24;
6508 if ((rel + 2 == relend && sec->size == offset + 16)
6509 || (rel + 3 < relend
6510 && rel[2].r_offset == offset + 16
6511 && rel[3].r_offset == offset + 24
6512 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6513 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6514 opd_ent_size = 16;
6515
6516 if (h != NULL
6517 && h->root.root.string[0] == '.')
6518 {
6519 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6520 ppc_hash_table (info));
6521 if (fdh != NULL
6522 && fdh->elf.root.type != bfd_link_hash_defined
6523 && fdh->elf.root.type != bfd_link_hash_defweak)
6524 fdh = NULL;
6525 }
6526
6527 skip = (sym_sec->owner != ibfd
6528 || sym_sec->output_section == bfd_abs_section_ptr);
6529 if (skip)
6530 {
6531 if (fdh != NULL && sym_sec->owner == ibfd)
6532 {
6533 /* Arrange for the function descriptor sym
6534 to be dropped. */
6535 fdh->elf.root.u.def.value = 0;
6536 fdh->elf.root.u.def.section = sym_sec;
6537 }
6538 opd_adjust[rel->r_offset / 8] = -1;
6539 }
6540 else
6541 {
6542 /* We'll be keeping this opd entry. */
6543
6544 if (fdh != NULL)
6545 {
6546 /* Redefine the function descriptor symbol to
6547 this location in the opd section. It is
6548 necessary to update the value here rather
6549 than using an array of adjustments as we do
6550 for local symbols, because various places
6551 in the generic ELF code use the value
6552 stored in u.def.value. */
6553 fdh->elf.root.u.def.value = wptr - new_contents;
6554 fdh->adjust_done = 1;
6555 }
6556
6557 /* Local syms are a bit tricky. We could
6558 tweak them as they can be cached, but
6559 we'd need to look through the local syms
6560 for the function descriptor sym which we
6561 don't have at the moment. So keep an
6562 array of adjustments. */
6563 opd_adjust[rel->r_offset / 8]
6564 = (wptr - new_contents) - (rptr - sec->contents);
6565
6566 if (wptr != rptr)
6567 memcpy (wptr, rptr, opd_ent_size);
6568 wptr += opd_ent_size;
6569 if (add_aux_fields && opd_ent_size == 16)
6570 {
6571 memset (wptr, '\0', 8);
6572 wptr += 8;
6573 }
6574 }
6575 rptr += opd_ent_size;
6576 offset += opd_ent_size;
6577 }
6578
6579 if (skip)
6580 {
6581 if (!NO_OPD_RELOCS
6582 && !info->relocatable
6583 && !dec_dynrel_count (rel->r_info, sec, info,
6584 NULL, h, sym_sec))
6585 goto error_ret;
6586 }
6587 else
6588 {
6589 /* We need to adjust any reloc offsets to point to the
6590 new opd entries. While we're at it, we may as well
6591 remove redundant relocs. */
6592 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6593 if (write_rel != rel)
6594 memcpy (write_rel, rel, sizeof (*rel));
6595 ++write_rel;
6596 }
6597 }
6598
6599 sec->size = wptr - new_contents;
6600 sec->reloc_count = write_rel - relstart;
6601 if (add_aux_fields)
6602 {
6603 free (sec->contents);
6604 sec->contents = new_contents;
6605 }
6606
6607 /* Fudge the size too, as this is used later in
6608 elf_bfd_final_link if we are emitting relocs. */
6609 elf_section_data (sec)->rel_hdr.sh_size
6610 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6611 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6612 some_edited = TRUE;
6613 }
6614 else if (elf_section_data (sec)->relocs != relstart)
6615 free (relstart);
6616
6617 if (local_syms != NULL
6618 && symtab_hdr->contents != (unsigned char *) local_syms)
6619 {
6620 if (!info->keep_memory)
6621 free (local_syms);
6622 else
6623 symtab_hdr->contents = (unsigned char *) local_syms;
6624 }
6625 }
6626
6627 if (some_edited)
6628 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6629
6630 /* If we are doing a final link and the last .opd entry is just 16 byte
6631 long, add a 8 byte padding after it. */
6632 if (need_pad != NULL && !info->relocatable)
6633 {
6634 bfd_byte *p;
6635
6636 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6637 {
6638 BFD_ASSERT (need_pad->size > 0);
6639
6640 p = bfd_malloc (need_pad->size + 8);
6641 if (p == NULL)
6642 return FALSE;
6643
6644 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6645 p, 0, need_pad->size))
6646 return FALSE;
6647
6648 need_pad->contents = p;
6649 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6650 }
6651 else
6652 {
6653 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6654 if (p == NULL)
6655 return FALSE;
6656
6657 need_pad->contents = p;
6658 }
6659
6660 memset (need_pad->contents + need_pad->size, 0, 8);
6661 need_pad->size += 8;
6662 }
6663
6664 return TRUE;
6665 }
6666
6667 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6668
6669 asection *
6670 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6671 {
6672 struct ppc_link_hash_table *htab;
6673
6674 htab = ppc_hash_table (info);
6675 if (htab->tls_get_addr != NULL)
6676 {
6677 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6678
6679 while (h->elf.root.type == bfd_link_hash_indirect
6680 || h->elf.root.type == bfd_link_hash_warning)
6681 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6682
6683 htab->tls_get_addr = h;
6684
6685 if (htab->tls_get_addr_fd == NULL
6686 && h->oh != NULL
6687 && h->oh->is_func_descriptor
6688 && (h->oh->elf.root.type == bfd_link_hash_defined
6689 || h->oh->elf.root.type == bfd_link_hash_defweak))
6690 htab->tls_get_addr_fd = h->oh;
6691 }
6692
6693 if (htab->tls_get_addr_fd != NULL)
6694 {
6695 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6696
6697 while (h->elf.root.type == bfd_link_hash_indirect
6698 || h->elf.root.type == bfd_link_hash_warning)
6699 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6700
6701 htab->tls_get_addr_fd = h;
6702 }
6703
6704 return _bfd_elf_tls_setup (obfd, info);
6705 }
6706
6707 /* Run through all the TLS relocs looking for optimization
6708 opportunities. The linker has been hacked (see ppc64elf.em) to do
6709 a preliminary section layout so that we know the TLS segment
6710 offsets. We can't optimize earlier because some optimizations need
6711 to know the tp offset, and we need to optimize before allocating
6712 dynamic relocations. */
6713
6714 bfd_boolean
6715 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6716 {
6717 bfd *ibfd;
6718 asection *sec;
6719 struct ppc_link_hash_table *htab;
6720
6721 if (info->relocatable || info->shared)
6722 return TRUE;
6723
6724 htab = ppc_hash_table (info);
6725 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6726 {
6727 Elf_Internal_Sym *locsyms = NULL;
6728 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6729 unsigned char *toc_ref = NULL;
6730
6731 /* Look at all the sections for this file, with TOC last. */
6732 for (sec = (ibfd->sections == toc && toc && toc->next ? toc->next
6733 : ibfd->sections);
6734 sec != NULL;
6735 sec = (sec == toc ? NULL
6736 : sec->next == NULL ? toc
6737 : sec->next == toc && toc->next ? toc->next
6738 : sec->next))
6739 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6740 {
6741 Elf_Internal_Rela *relstart, *rel, *relend;
6742 int expecting_tls_get_addr;
6743 long toc_ref_index = 0;
6744
6745 /* Read the relocations. */
6746 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6747 info->keep_memory);
6748 if (relstart == NULL)
6749 return FALSE;
6750
6751 expecting_tls_get_addr = 0;
6752 relend = relstart + sec->reloc_count;
6753 for (rel = relstart; rel < relend; rel++)
6754 {
6755 enum elf_ppc64_reloc_type r_type;
6756 unsigned long r_symndx;
6757 struct elf_link_hash_entry *h;
6758 Elf_Internal_Sym *sym;
6759 asection *sym_sec;
6760 char *tls_mask;
6761 char tls_set, tls_clear, tls_type = 0;
6762 bfd_vma value;
6763 bfd_boolean ok_tprel, is_local;
6764
6765 r_symndx = ELF64_R_SYM (rel->r_info);
6766 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6767 r_symndx, ibfd))
6768 {
6769 err_free_rel:
6770 if (elf_section_data (sec)->relocs != relstart)
6771 free (relstart);
6772 if (toc_ref != NULL)
6773 free (toc_ref);
6774 if (locsyms != NULL
6775 && (elf_tdata (ibfd)->symtab_hdr.contents
6776 != (unsigned char *) locsyms))
6777 free (locsyms);
6778 return FALSE;
6779 }
6780
6781 if (h != NULL)
6782 {
6783 if (h->root.type != bfd_link_hash_defined
6784 && h->root.type != bfd_link_hash_defweak)
6785 continue;
6786 value = h->root.u.def.value;
6787 }
6788 else
6789 /* Symbols referenced by TLS relocs must be of type
6790 STT_TLS. So no need for .opd local sym adjust. */
6791 value = sym->st_value;
6792
6793 ok_tprel = FALSE;
6794 is_local = FALSE;
6795 if (h == NULL
6796 || !h->def_dynamic)
6797 {
6798 is_local = TRUE;
6799 value += sym_sec->output_offset;
6800 value += sym_sec->output_section->vma;
6801 value -= htab->elf.tls_sec->vma;
6802 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6803 < (bfd_vma) 1 << 32);
6804 }
6805
6806 r_type = ELF64_R_TYPE (rel->r_info);
6807 switch (r_type)
6808 {
6809 case R_PPC64_GOT_TLSLD16:
6810 case R_PPC64_GOT_TLSLD16_LO:
6811 case R_PPC64_GOT_TLSLD16_HI:
6812 case R_PPC64_GOT_TLSLD16_HA:
6813 /* These relocs should never be against a symbol
6814 defined in a shared lib. Leave them alone if
6815 that turns out to be the case. */
6816 ppc64_tlsld_got (ibfd)->refcount -= 1;
6817 if (!is_local)
6818 continue;
6819
6820 /* LD -> LE */
6821 tls_set = 0;
6822 tls_clear = TLS_LD;
6823 tls_type = TLS_TLS | TLS_LD;
6824 expecting_tls_get_addr = 1;
6825 break;
6826
6827 case R_PPC64_GOT_TLSGD16:
6828 case R_PPC64_GOT_TLSGD16_LO:
6829 case R_PPC64_GOT_TLSGD16_HI:
6830 case R_PPC64_GOT_TLSGD16_HA:
6831 if (ok_tprel)
6832 /* GD -> LE */
6833 tls_set = 0;
6834 else
6835 /* GD -> IE */
6836 tls_set = TLS_TLS | TLS_TPRELGD;
6837 tls_clear = TLS_GD;
6838 tls_type = TLS_TLS | TLS_GD;
6839 expecting_tls_get_addr = 1;
6840 break;
6841
6842 case R_PPC64_GOT_TPREL16_DS:
6843 case R_PPC64_GOT_TPREL16_LO_DS:
6844 case R_PPC64_GOT_TPREL16_HI:
6845 case R_PPC64_GOT_TPREL16_HA:
6846 expecting_tls_get_addr = 0;
6847 if (ok_tprel)
6848 {
6849 /* IE -> LE */
6850 tls_set = 0;
6851 tls_clear = TLS_TPREL;
6852 tls_type = TLS_TLS | TLS_TPREL;
6853 break;
6854 }
6855 else
6856 continue;
6857
6858 case R_PPC64_REL14:
6859 case R_PPC64_REL14_BRTAKEN:
6860 case R_PPC64_REL14_BRNTAKEN:
6861 case R_PPC64_REL24:
6862 if (h != NULL
6863 && (h == &htab->tls_get_addr->elf
6864 || h == &htab->tls_get_addr_fd->elf))
6865 {
6866 if (!expecting_tls_get_addr
6867 && rel != relstart
6868 && ((ELF64_R_TYPE (rel[-1].r_info)
6869 == R_PPC64_TOC16)
6870 || (ELF64_R_TYPE (rel[-1].r_info)
6871 == R_PPC64_TOC16_LO)))
6872 {
6873 /* Check for toc tls entries. */
6874 char *toc_tls;
6875 int retval;
6876
6877 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6878 rel - 1, ibfd);
6879 if (retval == 0)
6880 goto err_free_rel;
6881 if (retval > 1 && toc_tls != NULL)
6882 {
6883 expecting_tls_get_addr = 1;
6884 if (toc_ref != NULL)
6885 toc_ref[toc_ref_index] = 1;
6886 }
6887 }
6888
6889 if (expecting_tls_get_addr)
6890 {
6891 struct plt_entry *ent;
6892 for (ent = h->plt.plist; ent; ent = ent->next)
6893 if (ent->addend == 0)
6894 {
6895 if (ent->plt.refcount > 0)
6896 ent->plt.refcount -= 1;
6897 break;
6898 }
6899 }
6900 }
6901 expecting_tls_get_addr = 0;
6902 continue;
6903
6904 case R_PPC64_TOC16:
6905 case R_PPC64_TOC16_LO:
6906 case R_PPC64_TLS:
6907 expecting_tls_get_addr = 0;
6908 if (sym_sec == toc && toc != NULL)
6909 {
6910 /* Mark this toc entry as referenced by a TLS
6911 code sequence. We can do that now in the
6912 case of R_PPC64_TLS, and after checking for
6913 tls_get_addr for the TOC16 relocs. */
6914 if (toc_ref == NULL)
6915 {
6916 toc_ref = bfd_zmalloc (toc->size / 8);
6917 if (toc_ref == NULL)
6918 goto err_free_rel;
6919 }
6920 if (h != NULL)
6921 value = h->root.u.def.value;
6922 else
6923 value = sym->st_value;
6924 value += rel->r_addend;
6925 BFD_ASSERT (value < toc->size && value % 8 == 0);
6926 toc_ref_index = value / 8;
6927 if (r_type == R_PPC64_TLS)
6928 toc_ref[toc_ref_index] = 1;
6929 }
6930 continue;
6931
6932 case R_PPC64_TPREL64:
6933 expecting_tls_get_addr = 0;
6934 if (sec != toc
6935 || toc_ref == NULL
6936 || !toc_ref[rel->r_offset / 8])
6937 continue;
6938 if (ok_tprel)
6939 {
6940 /* IE -> LE */
6941 tls_set = TLS_EXPLICIT;
6942 tls_clear = TLS_TPREL;
6943 break;
6944 }
6945 else
6946 continue;
6947
6948 case R_PPC64_DTPMOD64:
6949 expecting_tls_get_addr = 0;
6950 if (sec != toc
6951 || toc_ref == NULL
6952 || !toc_ref[rel->r_offset / 8])
6953 continue;
6954 if (rel + 1 < relend
6955 && (rel[1].r_info
6956 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6957 && rel[1].r_offset == rel->r_offset + 8)
6958 {
6959 if (ok_tprel)
6960 /* GD -> LE */
6961 tls_set = TLS_EXPLICIT | TLS_GD;
6962 else
6963 /* GD -> IE */
6964 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6965 tls_clear = TLS_GD;
6966 }
6967 else
6968 {
6969 if (!is_local)
6970 continue;
6971
6972 /* LD -> LE */
6973 tls_set = TLS_EXPLICIT;
6974 tls_clear = TLS_LD;
6975 }
6976 break;
6977
6978 default:
6979 expecting_tls_get_addr = 0;
6980 continue;
6981 }
6982
6983 if ((tls_set & TLS_EXPLICIT) == 0)
6984 {
6985 struct got_entry *ent;
6986
6987 /* Adjust got entry for this reloc. */
6988 if (h != NULL)
6989 ent = h->got.glist;
6990 else
6991 ent = elf_local_got_ents (ibfd)[r_symndx];
6992
6993 for (; ent != NULL; ent = ent->next)
6994 if (ent->addend == rel->r_addend
6995 && ent->owner == ibfd
6996 && ent->tls_type == tls_type)
6997 break;
6998 if (ent == NULL)
6999 abort ();
7000
7001 if (tls_set == 0)
7002 {
7003 /* We managed to get rid of a got entry. */
7004 if (ent->got.refcount > 0)
7005 ent->got.refcount -= 1;
7006 }
7007 }
7008 else
7009 {
7010 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7011 we'll lose one or two dyn relocs. */
7012 if (!dec_dynrel_count (rel->r_info, sec, info,
7013 NULL, h, sym_sec))
7014 return FALSE;
7015
7016 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7017 {
7018 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7019 NULL, h, sym_sec))
7020 return FALSE;
7021 }
7022 }
7023
7024 *tls_mask |= tls_set;
7025 *tls_mask &= ~tls_clear;
7026 }
7027
7028 if (elf_section_data (sec)->relocs != relstart)
7029 free (relstart);
7030 }
7031
7032 if (toc_ref != NULL)
7033 free (toc_ref);
7034
7035 if (locsyms != NULL
7036 && (elf_tdata (ibfd)->symtab_hdr.contents
7037 != (unsigned char *) locsyms))
7038 {
7039 if (!info->keep_memory)
7040 free (locsyms);
7041 else
7042 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
7043 }
7044 }
7045 return TRUE;
7046 }
7047
7048 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7049 the values of any global symbols in a toc section that has been
7050 edited. Globals in toc sections should be a rarity, so this function
7051 sets a flag if any are found in toc sections other than the one just
7052 edited, so that futher hash table traversals can be avoided. */
7053
7054 struct adjust_toc_info
7055 {
7056 asection *toc;
7057 unsigned long *skip;
7058 bfd_boolean global_toc_syms;
7059 };
7060
7061 static bfd_boolean
7062 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7063 {
7064 struct ppc_link_hash_entry *eh;
7065 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7066
7067 if (h->root.type == bfd_link_hash_indirect)
7068 return TRUE;
7069
7070 if (h->root.type == bfd_link_hash_warning)
7071 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7072
7073 if (h->root.type != bfd_link_hash_defined
7074 && h->root.type != bfd_link_hash_defweak)
7075 return TRUE;
7076
7077 eh = (struct ppc_link_hash_entry *) h;
7078 if (eh->adjust_done)
7079 return TRUE;
7080
7081 if (eh->elf.root.u.def.section == toc_inf->toc)
7082 {
7083 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7084 if (skip != (unsigned long) -1)
7085 eh->elf.root.u.def.value -= skip;
7086 else
7087 {
7088 (*_bfd_error_handler)
7089 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7090 eh->elf.root.u.def.section = &bfd_abs_section;
7091 eh->elf.root.u.def.value = 0;
7092 }
7093 eh->adjust_done = 1;
7094 }
7095 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7096 toc_inf->global_toc_syms = TRUE;
7097
7098 return TRUE;
7099 }
7100
7101 /* Examine all relocs referencing .toc sections in order to remove
7102 unused .toc entries. */
7103
7104 bfd_boolean
7105 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7106 {
7107 bfd *ibfd;
7108 struct adjust_toc_info toc_inf;
7109
7110 toc_inf.global_toc_syms = TRUE;
7111 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7112 {
7113 asection *toc, *sec;
7114 Elf_Internal_Shdr *symtab_hdr;
7115 Elf_Internal_Sym *local_syms;
7116 struct elf_link_hash_entry **sym_hashes;
7117 Elf_Internal_Rela *relstart, *rel;
7118 unsigned long *skip, *drop;
7119 unsigned char *used;
7120 unsigned char *keep, last, some_unused;
7121
7122 toc = bfd_get_section_by_name (ibfd, ".toc");
7123 if (toc == NULL
7124 || toc->size == 0
7125 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7126 || elf_discarded_section (toc))
7127 continue;
7128
7129 local_syms = NULL;
7130 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7131 sym_hashes = elf_sym_hashes (ibfd);
7132
7133 /* Look at sections dropped from the final link. */
7134 skip = NULL;
7135 relstart = NULL;
7136 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7137 {
7138 if (sec->reloc_count == 0
7139 || !elf_discarded_section (sec)
7140 || get_opd_info (sec)
7141 || (sec->flags & SEC_ALLOC) == 0
7142 || (sec->flags & SEC_DEBUGGING) != 0)
7143 continue;
7144
7145 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7146 if (relstart == NULL)
7147 goto error_ret;
7148
7149 /* Run through the relocs to see which toc entries might be
7150 unused. */
7151 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7152 {
7153 enum elf_ppc64_reloc_type r_type;
7154 unsigned long r_symndx;
7155 asection *sym_sec;
7156 struct elf_link_hash_entry *h;
7157 Elf_Internal_Sym *sym;
7158 bfd_vma val;
7159
7160 r_type = ELF64_R_TYPE (rel->r_info);
7161 switch (r_type)
7162 {
7163 default:
7164 continue;
7165
7166 case R_PPC64_TOC16:
7167 case R_PPC64_TOC16_LO:
7168 case R_PPC64_TOC16_HI:
7169 case R_PPC64_TOC16_HA:
7170 case R_PPC64_TOC16_DS:
7171 case R_PPC64_TOC16_LO_DS:
7172 break;
7173 }
7174
7175 r_symndx = ELF64_R_SYM (rel->r_info);
7176 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7177 r_symndx, ibfd))
7178 goto error_ret;
7179
7180 if (sym_sec != toc)
7181 continue;
7182
7183 if (h != NULL)
7184 val = h->root.u.def.value;
7185 else
7186 val = sym->st_value;
7187 val += rel->r_addend;
7188
7189 if (val >= toc->size)
7190 continue;
7191
7192 /* Anything in the toc ought to be aligned to 8 bytes.
7193 If not, don't mark as unused. */
7194 if (val & 7)
7195 continue;
7196
7197 if (skip == NULL)
7198 {
7199 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7200 if (skip == NULL)
7201 goto error_ret;
7202 }
7203
7204 skip[val >> 3] = 1;
7205 }
7206
7207 if (elf_section_data (sec)->relocs != relstart)
7208 free (relstart);
7209 }
7210
7211 if (skip == NULL)
7212 continue;
7213
7214 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7215 if (used == NULL)
7216 {
7217 error_ret:
7218 if (local_syms != NULL
7219 && symtab_hdr->contents != (unsigned char *) local_syms)
7220 free (local_syms);
7221 if (sec != NULL
7222 && relstart != NULL
7223 && elf_section_data (sec)->relocs != relstart)
7224 free (relstart);
7225 if (skip != NULL)
7226 free (skip);
7227 return FALSE;
7228 }
7229
7230 /* Now check all kept sections that might reference the toc.
7231 Check the toc itself last. */
7232 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7233 : ibfd->sections);
7234 sec != NULL;
7235 sec = (sec == toc ? NULL
7236 : sec->next == NULL ? toc
7237 : sec->next == toc && toc->next ? toc->next
7238 : sec->next))
7239 {
7240 int repeat;
7241
7242 if (sec->reloc_count == 0
7243 || elf_discarded_section (sec)
7244 || get_opd_info (sec)
7245 || (sec->flags & SEC_ALLOC) == 0
7246 || (sec->flags & SEC_DEBUGGING) != 0)
7247 continue;
7248
7249 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7250 if (relstart == NULL)
7251 goto error_ret;
7252
7253 /* Mark toc entries referenced as used. */
7254 repeat = 0;
7255 do
7256 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7257 {
7258 enum elf_ppc64_reloc_type r_type;
7259 unsigned long r_symndx;
7260 asection *sym_sec;
7261 struct elf_link_hash_entry *h;
7262 Elf_Internal_Sym *sym;
7263 bfd_vma val;
7264
7265 r_type = ELF64_R_TYPE (rel->r_info);
7266 switch (r_type)
7267 {
7268 case R_PPC64_TOC16:
7269 case R_PPC64_TOC16_LO:
7270 case R_PPC64_TOC16_HI:
7271 case R_PPC64_TOC16_HA:
7272 case R_PPC64_TOC16_DS:
7273 case R_PPC64_TOC16_LO_DS:
7274 /* In case we're taking addresses of toc entries. */
7275 case R_PPC64_ADDR64:
7276 break;
7277
7278 default:
7279 continue;
7280 }
7281
7282 r_symndx = ELF64_R_SYM (rel->r_info);
7283 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7284 r_symndx, ibfd))
7285 {
7286 free (used);
7287 goto error_ret;
7288 }
7289
7290 if (sym_sec != toc)
7291 continue;
7292
7293 if (h != NULL)
7294 val = h->root.u.def.value;
7295 else
7296 val = sym->st_value;
7297 val += rel->r_addend;
7298
7299 if (val >= toc->size)
7300 continue;
7301
7302 /* For the toc section, we only mark as used if
7303 this entry itself isn't unused. */
7304 if (sec == toc
7305 && !used[val >> 3]
7306 && (used[rel->r_offset >> 3]
7307 || !skip[rel->r_offset >> 3]))
7308 /* Do all the relocs again, to catch reference
7309 chains. */
7310 repeat = 1;
7311
7312 used[val >> 3] = 1;
7313 }
7314 while (repeat);
7315 }
7316
7317 /* Merge the used and skip arrays. Assume that TOC
7318 doublewords not appearing as either used or unused belong
7319 to to an entry more than one doubleword in size. */
7320 for (drop = skip, keep = used, last = 0, some_unused = 0;
7321 drop < skip + (toc->size + 7) / 8;
7322 ++drop, ++keep)
7323 {
7324 if (*keep)
7325 {
7326 *drop = 0;
7327 last = 0;
7328 }
7329 else if (*drop)
7330 {
7331 some_unused = 1;
7332 last = 1;
7333 }
7334 else
7335 *drop = last;
7336 }
7337
7338 free (used);
7339
7340 if (some_unused)
7341 {
7342 bfd_byte *contents, *src;
7343 unsigned long off;
7344
7345 /* Shuffle the toc contents, and at the same time convert the
7346 skip array from booleans into offsets. */
7347 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7348 goto error_ret;
7349
7350 elf_section_data (toc)->this_hdr.contents = contents;
7351
7352 for (src = contents, off = 0, drop = skip;
7353 src < contents + toc->size;
7354 src += 8, ++drop)
7355 {
7356 if (*drop)
7357 {
7358 *drop = (unsigned long) -1;
7359 off += 8;
7360 }
7361 else if (off != 0)
7362 {
7363 *drop = off;
7364 memcpy (src - off, src, 8);
7365 }
7366 }
7367 toc->rawsize = toc->size;
7368 toc->size = src - contents - off;
7369
7370 if (toc->reloc_count != 0)
7371 {
7372 Elf_Internal_Rela *wrel;
7373 bfd_size_type sz;
7374
7375 /* Read toc relocs. */
7376 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7377 TRUE);
7378 if (relstart == NULL)
7379 goto error_ret;
7380
7381 /* Remove unused toc relocs, and adjust those we keep. */
7382 wrel = relstart;
7383 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7384 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7385 {
7386 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7387 wrel->r_info = rel->r_info;
7388 wrel->r_addend = rel->r_addend;
7389 ++wrel;
7390 }
7391 else if (!dec_dynrel_count (rel->r_info, toc, info,
7392 &local_syms, NULL, NULL))
7393 goto error_ret;
7394
7395 toc->reloc_count = wrel - relstart;
7396 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7397 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7398 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7399 }
7400
7401 /* Adjust addends for relocs against the toc section sym. */
7402 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7403 {
7404 if (sec->reloc_count == 0
7405 || elf_discarded_section (sec))
7406 continue;
7407
7408 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7409 TRUE);
7410 if (relstart == NULL)
7411 goto error_ret;
7412
7413 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7414 {
7415 enum elf_ppc64_reloc_type r_type;
7416 unsigned long r_symndx;
7417 asection *sym_sec;
7418 struct elf_link_hash_entry *h;
7419 Elf_Internal_Sym *sym;
7420
7421 r_type = ELF64_R_TYPE (rel->r_info);
7422 switch (r_type)
7423 {
7424 default:
7425 continue;
7426
7427 case R_PPC64_TOC16:
7428 case R_PPC64_TOC16_LO:
7429 case R_PPC64_TOC16_HI:
7430 case R_PPC64_TOC16_HA:
7431 case R_PPC64_TOC16_DS:
7432 case R_PPC64_TOC16_LO_DS:
7433 case R_PPC64_ADDR64:
7434 break;
7435 }
7436
7437 r_symndx = ELF64_R_SYM (rel->r_info);
7438 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7439 r_symndx, ibfd))
7440 goto error_ret;
7441
7442 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7443 continue;
7444
7445 rel->r_addend -= skip[rel->r_addend >> 3];
7446 }
7447 }
7448
7449 /* We shouldn't have local or global symbols defined in the TOC,
7450 but handle them anyway. */
7451 if (local_syms != NULL)
7452 {
7453 Elf_Internal_Sym *sym;
7454
7455 for (sym = local_syms;
7456 sym < local_syms + symtab_hdr->sh_info;
7457 ++sym)
7458 if (sym->st_shndx != SHN_UNDEF
7459 && (sym->st_shndx < SHN_LORESERVE
7460 || sym->st_shndx > SHN_HIRESERVE)
7461 && sym->st_value != 0
7462 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7463 {
7464 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7465 sym->st_value -= skip[sym->st_value >> 3];
7466 else
7467 {
7468 (*_bfd_error_handler)
7469 (_("%s defined in removed toc entry"),
7470 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7471 NULL));
7472 sym->st_value = 0;
7473 sym->st_shndx = SHN_ABS;
7474 }
7475 symtab_hdr->contents = (unsigned char *) local_syms;
7476 }
7477 }
7478
7479 /* Finally, adjust any global syms defined in the toc. */
7480 if (toc_inf.global_toc_syms)
7481 {
7482 toc_inf.toc = toc;
7483 toc_inf.skip = skip;
7484 toc_inf.global_toc_syms = FALSE;
7485 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7486 &toc_inf);
7487 }
7488 }
7489
7490 if (local_syms != NULL
7491 && symtab_hdr->contents != (unsigned char *) local_syms)
7492 {
7493 if (!info->keep_memory)
7494 free (local_syms);
7495 else
7496 symtab_hdr->contents = (unsigned char *) local_syms;
7497 }
7498 free (skip);
7499 }
7500
7501 return TRUE;
7502 }
7503
7504 /* Allocate space in .plt, .got and associated reloc sections for
7505 dynamic relocs. */
7506
7507 static bfd_boolean
7508 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7509 {
7510 struct bfd_link_info *info;
7511 struct ppc_link_hash_table *htab;
7512 asection *s;
7513 struct ppc_link_hash_entry *eh;
7514 struct ppc_dyn_relocs *p;
7515 struct got_entry *gent;
7516
7517 if (h->root.type == bfd_link_hash_indirect)
7518 return TRUE;
7519
7520 if (h->root.type == bfd_link_hash_warning)
7521 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7522
7523 info = (struct bfd_link_info *) inf;
7524 htab = ppc_hash_table (info);
7525
7526 if (htab->elf.dynamic_sections_created
7527 && h->dynindx != -1
7528 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7529 {
7530 struct plt_entry *pent;
7531 bfd_boolean doneone = FALSE;
7532 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7533 if (pent->plt.refcount > 0)
7534 {
7535 /* If this is the first .plt entry, make room for the special
7536 first entry. */
7537 s = htab->plt;
7538 if (s->size == 0)
7539 s->size += PLT_INITIAL_ENTRY_SIZE;
7540
7541 pent->plt.offset = s->size;
7542
7543 /* Make room for this entry. */
7544 s->size += PLT_ENTRY_SIZE;
7545
7546 /* Make room for the .glink code. */
7547 s = htab->glink;
7548 if (s->size == 0)
7549 s->size += GLINK_CALL_STUB_SIZE;
7550 /* We need bigger stubs past index 32767. */
7551 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7552 s->size += 4;
7553 s->size += 2*4;
7554
7555 /* We also need to make an entry in the .rela.plt section. */
7556 s = htab->relplt;
7557 s->size += sizeof (Elf64_External_Rela);
7558 doneone = TRUE;
7559 }
7560 else
7561 pent->plt.offset = (bfd_vma) -1;
7562 if (!doneone)
7563 {
7564 h->plt.plist = NULL;
7565 h->needs_plt = 0;
7566 }
7567 }
7568 else
7569 {
7570 h->plt.plist = NULL;
7571 h->needs_plt = 0;
7572 }
7573
7574 eh = (struct ppc_link_hash_entry *) h;
7575 /* Run through the TLS GD got entries first if we're changing them
7576 to TPREL. */
7577 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7578 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7579 if (gent->got.refcount > 0
7580 && (gent->tls_type & TLS_GD) != 0)
7581 {
7582 /* This was a GD entry that has been converted to TPREL. If
7583 there happens to be a TPREL entry we can use that one. */
7584 struct got_entry *ent;
7585 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7586 if (ent->got.refcount > 0
7587 && (ent->tls_type & TLS_TPREL) != 0
7588 && ent->addend == gent->addend
7589 && ent->owner == gent->owner)
7590 {
7591 gent->got.refcount = 0;
7592 break;
7593 }
7594
7595 /* If not, then we'll be using our own TPREL entry. */
7596 if (gent->got.refcount != 0)
7597 gent->tls_type = TLS_TLS | TLS_TPREL;
7598 }
7599
7600 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7601 if (gent->got.refcount > 0)
7602 {
7603 bfd_boolean dyn;
7604
7605 /* Make sure this symbol is output as a dynamic symbol.
7606 Undefined weak syms won't yet be marked as dynamic,
7607 nor will all TLS symbols. */
7608 if (h->dynindx == -1
7609 && !h->forced_local)
7610 {
7611 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7612 return FALSE;
7613 }
7614
7615 if ((gent->tls_type & TLS_LD) != 0
7616 && !h->def_dynamic)
7617 {
7618 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
7619 continue;
7620 }
7621
7622 s = ppc64_elf_tdata (gent->owner)->got;
7623 gent->got.offset = s->size;
7624 s->size
7625 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7626 dyn = htab->elf.dynamic_sections_created;
7627 if ((info->shared
7628 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7629 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7630 || h->root.type != bfd_link_hash_undefweak))
7631 ppc64_elf_tdata (gent->owner)->relgot->size
7632 += (gent->tls_type & eh->tls_mask & TLS_GD
7633 ? 2 * sizeof (Elf64_External_Rela)
7634 : sizeof (Elf64_External_Rela));
7635 }
7636 else
7637 gent->got.offset = (bfd_vma) -1;
7638
7639 if (eh->dyn_relocs == NULL)
7640 return TRUE;
7641
7642 /* In the shared -Bsymbolic case, discard space allocated for
7643 dynamic pc-relative relocs against symbols which turn out to be
7644 defined in regular objects. For the normal shared case, discard
7645 space for relocs that have become local due to symbol visibility
7646 changes. */
7647
7648 if (info->shared)
7649 {
7650 /* Relocs that use pc_count are those that appear on a call insn,
7651 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7652 generated via assembly. We want calls to protected symbols to
7653 resolve directly to the function rather than going via the plt.
7654 If people want function pointer comparisons to work as expected
7655 then they should avoid writing weird assembly. */
7656 if (SYMBOL_CALLS_LOCAL (info, h))
7657 {
7658 struct ppc_dyn_relocs **pp;
7659
7660 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7661 {
7662 p->count -= p->pc_count;
7663 p->pc_count = 0;
7664 if (p->count == 0)
7665 *pp = p->next;
7666 else
7667 pp = &p->next;
7668 }
7669 }
7670
7671 /* Also discard relocs on undefined weak syms with non-default
7672 visibility. */
7673 if (eh->dyn_relocs != NULL
7674 && h->root.type == bfd_link_hash_undefweak)
7675 {
7676 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7677 eh->dyn_relocs = NULL;
7678
7679 /* Make sure this symbol is output as a dynamic symbol.
7680 Undefined weak syms won't yet be marked as dynamic. */
7681 else if (h->dynindx == -1
7682 && !h->forced_local)
7683 {
7684 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7685 return FALSE;
7686 }
7687 }
7688 }
7689 else if (ELIMINATE_COPY_RELOCS)
7690 {
7691 /* For the non-shared case, discard space for relocs against
7692 symbols which turn out to need copy relocs or are not
7693 dynamic. */
7694
7695 if (!h->non_got_ref
7696 && h->def_dynamic
7697 && !h->def_regular)
7698 {
7699 /* Make sure this symbol is output as a dynamic symbol.
7700 Undefined weak syms won't yet be marked as dynamic. */
7701 if (h->dynindx == -1
7702 && !h->forced_local)
7703 {
7704 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7705 return FALSE;
7706 }
7707
7708 /* If that succeeded, we know we'll be keeping all the
7709 relocs. */
7710 if (h->dynindx != -1)
7711 goto keep;
7712 }
7713
7714 eh->dyn_relocs = NULL;
7715
7716 keep: ;
7717 }
7718
7719 /* Finally, allocate space. */
7720 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7721 {
7722 asection *sreloc = elf_section_data (p->sec)->sreloc;
7723 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7724 }
7725
7726 return TRUE;
7727 }
7728
7729 /* Find any dynamic relocs that apply to read-only sections. */
7730
7731 static bfd_boolean
7732 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7733 {
7734 struct ppc_link_hash_entry *eh;
7735 struct ppc_dyn_relocs *p;
7736
7737 if (h->root.type == bfd_link_hash_warning)
7738 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7739
7740 eh = (struct ppc_link_hash_entry *) h;
7741 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7742 {
7743 asection *s = p->sec->output_section;
7744
7745 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7746 {
7747 struct bfd_link_info *info = inf;
7748
7749 info->flags |= DF_TEXTREL;
7750
7751 /* Not an error, just cut short the traversal. */
7752 return FALSE;
7753 }
7754 }
7755 return TRUE;
7756 }
7757
7758 /* Set the sizes of the dynamic sections. */
7759
7760 static bfd_boolean
7761 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7762 struct bfd_link_info *info)
7763 {
7764 struct ppc_link_hash_table *htab;
7765 bfd *dynobj;
7766 asection *s;
7767 bfd_boolean relocs;
7768 bfd *ibfd;
7769
7770 htab = ppc_hash_table (info);
7771 dynobj = htab->elf.dynobj;
7772 if (dynobj == NULL)
7773 abort ();
7774
7775 if (htab->elf.dynamic_sections_created)
7776 {
7777 /* Set the contents of the .interp section to the interpreter. */
7778 if (info->executable)
7779 {
7780 s = bfd_get_section_by_name (dynobj, ".interp");
7781 if (s == NULL)
7782 abort ();
7783 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7784 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7785 }
7786 }
7787
7788 /* Set up .got offsets for local syms, and space for local dynamic
7789 relocs. */
7790 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7791 {
7792 struct got_entry **lgot_ents;
7793 struct got_entry **end_lgot_ents;
7794 char *lgot_masks;
7795 bfd_size_type locsymcount;
7796 Elf_Internal_Shdr *symtab_hdr;
7797 asection *srel;
7798
7799 if (!is_ppc64_elf_target (ibfd->xvec))
7800 continue;
7801
7802 if (ppc64_tlsld_got (ibfd)->refcount > 0)
7803 {
7804 s = ppc64_elf_tdata (ibfd)->got;
7805 ppc64_tlsld_got (ibfd)->offset = s->size;
7806 s->size += 16;
7807 if (info->shared)
7808 {
7809 srel = ppc64_elf_tdata (ibfd)->relgot;
7810 srel->size += sizeof (Elf64_External_Rela);
7811 }
7812 }
7813 else
7814 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
7815
7816 for (s = ibfd->sections; s != NULL; s = s->next)
7817 {
7818 struct ppc_dyn_relocs *p;
7819
7820 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7821 {
7822 if (!bfd_is_abs_section (p->sec)
7823 && bfd_is_abs_section (p->sec->output_section))
7824 {
7825 /* Input section has been discarded, either because
7826 it is a copy of a linkonce section or due to
7827 linker script /DISCARD/, so we'll be discarding
7828 the relocs too. */
7829 }
7830 else if (p->count != 0)
7831 {
7832 srel = elf_section_data (p->sec)->sreloc;
7833 srel->size += p->count * sizeof (Elf64_External_Rela);
7834 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7835 info->flags |= DF_TEXTREL;
7836 }
7837 }
7838 }
7839
7840 lgot_ents = elf_local_got_ents (ibfd);
7841 if (!lgot_ents)
7842 continue;
7843
7844 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
7845 locsymcount = symtab_hdr->sh_info;
7846 end_lgot_ents = lgot_ents + locsymcount;
7847 lgot_masks = (char *) end_lgot_ents;
7848 s = ppc64_elf_tdata (ibfd)->got;
7849 srel = ppc64_elf_tdata (ibfd)->relgot;
7850 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7851 {
7852 struct got_entry *ent;
7853
7854 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7855 if (ent->got.refcount > 0)
7856 {
7857 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7858 {
7859 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
7860 {
7861 ppc64_tlsld_got (ibfd)->offset = s->size;
7862 s->size += 16;
7863 if (info->shared)
7864 srel->size += sizeof (Elf64_External_Rela);
7865 }
7866 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
7867 }
7868 else
7869 {
7870 ent->got.offset = s->size;
7871 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7872 {
7873 s->size += 16;
7874 if (info->shared)
7875 srel->size += 2 * sizeof (Elf64_External_Rela);
7876 }
7877 else
7878 {
7879 s->size += 8;
7880 if (info->shared)
7881 srel->size += sizeof (Elf64_External_Rela);
7882 }
7883 }
7884 }
7885 else
7886 ent->got.offset = (bfd_vma) -1;
7887 }
7888 }
7889
7890 /* Allocate global sym .plt and .got entries, and space for global
7891 sym dynamic relocs. */
7892 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
7893
7894 /* We now have determined the sizes of the various dynamic sections.
7895 Allocate memory for them. */
7896 relocs = FALSE;
7897 for (s = dynobj->sections; s != NULL; s = s->next)
7898 {
7899 if ((s->flags & SEC_LINKER_CREATED) == 0)
7900 continue;
7901
7902 if (s == htab->brlt || s == htab->relbrlt)
7903 /* These haven't been allocated yet; don't strip. */
7904 continue;
7905 else if (s == htab->got
7906 || s == htab->plt
7907 || s == htab->glink
7908 || s == htab->dynbss)
7909 {
7910 /* Strip this section if we don't need it; see the
7911 comment below. */
7912 }
7913 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
7914 {
7915 if (s->size != 0)
7916 {
7917 if (s != htab->relplt)
7918 relocs = TRUE;
7919
7920 /* We use the reloc_count field as a counter if we need
7921 to copy relocs into the output file. */
7922 s->reloc_count = 0;
7923 }
7924 }
7925 else
7926 {
7927 /* It's not one of our sections, so don't allocate space. */
7928 continue;
7929 }
7930
7931 if (s->size == 0)
7932 {
7933 /* If we don't need this section, strip it from the
7934 output file. This is mostly to handle .rela.bss and
7935 .rela.plt. We must create both sections in
7936 create_dynamic_sections, because they must be created
7937 before the linker maps input sections to output
7938 sections. The linker does that before
7939 adjust_dynamic_symbol is called, and it is that
7940 function which decides whether anything needs to go
7941 into these sections. */
7942 s->flags |= SEC_EXCLUDE;
7943 continue;
7944 }
7945
7946 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7947 continue;
7948
7949 /* Allocate memory for the section contents. We use bfd_zalloc
7950 here in case unused entries are not reclaimed before the
7951 section's contents are written out. This should not happen,
7952 but this way if it does we get a R_PPC64_NONE reloc in .rela
7953 sections instead of garbage.
7954 We also rely on the section contents being zero when writing
7955 the GOT. */
7956 s->contents = bfd_zalloc (dynobj, s->size);
7957 if (s->contents == NULL)
7958 return FALSE;
7959 }
7960
7961 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7962 {
7963 if (!is_ppc64_elf_target (ibfd->xvec))
7964 continue;
7965
7966 s = ppc64_elf_tdata (ibfd)->got;
7967 if (s != NULL && s != htab->got)
7968 {
7969 if (s->size == 0)
7970 s->flags |= SEC_EXCLUDE;
7971 else
7972 {
7973 s->contents = bfd_zalloc (ibfd, s->size);
7974 if (s->contents == NULL)
7975 return FALSE;
7976 }
7977 }
7978 s = ppc64_elf_tdata (ibfd)->relgot;
7979 if (s != NULL)
7980 {
7981 if (s->size == 0)
7982 s->flags |= SEC_EXCLUDE;
7983 else
7984 {
7985 s->contents = bfd_zalloc (ibfd, s->size);
7986 if (s->contents == NULL)
7987 return FALSE;
7988 relocs = TRUE;
7989 s->reloc_count = 0;
7990 }
7991 }
7992 }
7993
7994 if (htab->elf.dynamic_sections_created)
7995 {
7996 /* Add some entries to the .dynamic section. We fill in the
7997 values later, in ppc64_elf_finish_dynamic_sections, but we
7998 must add the entries now so that we get the correct size for
7999 the .dynamic section. The DT_DEBUG entry is filled in by the
8000 dynamic linker and used by the debugger. */
8001 #define add_dynamic_entry(TAG, VAL) \
8002 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8003
8004 if (info->executable)
8005 {
8006 if (!add_dynamic_entry (DT_DEBUG, 0))
8007 return FALSE;
8008 }
8009
8010 if (htab->plt != NULL && htab->plt->size != 0)
8011 {
8012 if (!add_dynamic_entry (DT_PLTGOT, 0)
8013 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8014 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8015 || !add_dynamic_entry (DT_JMPREL, 0)
8016 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8017 return FALSE;
8018 }
8019
8020 if (NO_OPD_RELOCS)
8021 {
8022 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8023 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8024 return FALSE;
8025 }
8026
8027 if (relocs)
8028 {
8029 if (!add_dynamic_entry (DT_RELA, 0)
8030 || !add_dynamic_entry (DT_RELASZ, 0)
8031 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8032 return FALSE;
8033
8034 /* If any dynamic relocs apply to a read-only section,
8035 then we need a DT_TEXTREL entry. */
8036 if ((info->flags & DF_TEXTREL) == 0)
8037 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8038
8039 if ((info->flags & DF_TEXTREL) != 0)
8040 {
8041 if (!add_dynamic_entry (DT_TEXTREL, 0))
8042 return FALSE;
8043 }
8044 }
8045 }
8046 #undef add_dynamic_entry
8047
8048 return TRUE;
8049 }
8050
8051 /* Determine the type of stub needed, if any, for a call. */
8052
8053 static inline enum ppc_stub_type
8054 ppc_type_of_stub (asection *input_sec,
8055 const Elf_Internal_Rela *rel,
8056 struct ppc_link_hash_entry **hash,
8057 bfd_vma destination)
8058 {
8059 struct ppc_link_hash_entry *h = *hash;
8060 bfd_vma location;
8061 bfd_vma branch_offset;
8062 bfd_vma max_branch_offset;
8063 enum elf_ppc64_reloc_type r_type;
8064
8065 if (h != NULL)
8066 {
8067 struct ppc_link_hash_entry *fdh = h;
8068 if (fdh->oh != NULL
8069 && fdh->oh->is_func_descriptor)
8070 fdh = fdh->oh;
8071
8072 if (fdh->elf.dynindx != -1)
8073 {
8074 struct plt_entry *ent;
8075
8076 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8077 if (ent->addend == rel->r_addend
8078 && ent->plt.offset != (bfd_vma) -1)
8079 {
8080 *hash = fdh;
8081 return ppc_stub_plt_call;
8082 }
8083 }
8084
8085 /* Here, we know we don't have a plt entry. If we don't have a
8086 either a defined function descriptor or a defined entry symbol
8087 in a regular object file, then it is pointless trying to make
8088 any other type of stub. */
8089 if (!((fdh->elf.root.type == bfd_link_hash_defined
8090 || fdh->elf.root.type == bfd_link_hash_defweak)
8091 && fdh->elf.root.u.def.section->output_section != NULL)
8092 && !((h->elf.root.type == bfd_link_hash_defined
8093 || h->elf.root.type == bfd_link_hash_defweak)
8094 && h->elf.root.u.def.section->output_section != NULL))
8095 return ppc_stub_none;
8096 }
8097
8098 /* Determine where the call point is. */
8099 location = (input_sec->output_offset
8100 + input_sec->output_section->vma
8101 + rel->r_offset);
8102
8103 branch_offset = destination - location;
8104 r_type = ELF64_R_TYPE (rel->r_info);
8105
8106 /* Determine if a long branch stub is needed. */
8107 max_branch_offset = 1 << 25;
8108 if (r_type != R_PPC64_REL24)
8109 max_branch_offset = 1 << 15;
8110
8111 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8112 /* We need a stub. Figure out whether a long_branch or plt_branch
8113 is needed later. */
8114 return ppc_stub_long_branch;
8115
8116 return ppc_stub_none;
8117 }
8118
8119 /* Build a .plt call stub. */
8120
8121 static inline bfd_byte *
8122 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8123 {
8124 #define PPC_LO(v) ((v) & 0xffff)
8125 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8126 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8127
8128 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8129 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8130 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8131 if (PPC_HA (offset + 8) != PPC_HA (offset))
8132 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8133 offset += 8;
8134 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
8135 if (PPC_HA (offset + 8) != PPC_HA (offset))
8136 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
8137 offset += 8;
8138 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8139 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8140 bfd_put_32 (obfd, BCTR, p), p += 4;
8141 return p;
8142 }
8143
8144 static bfd_boolean
8145 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8146 {
8147 struct ppc_stub_hash_entry *stub_entry;
8148 struct ppc_branch_hash_entry *br_entry;
8149 struct bfd_link_info *info;
8150 struct ppc_link_hash_table *htab;
8151 bfd_byte *loc;
8152 bfd_byte *p;
8153 unsigned int indx;
8154 struct plt_entry *ent;
8155 bfd_vma dest, off;
8156 int size;
8157
8158 /* Massage our args to the form they really have. */
8159 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8160 info = in_arg;
8161
8162 htab = ppc_hash_table (info);
8163
8164 /* Make a note of the offset within the stubs for this entry. */
8165 stub_entry->stub_offset = stub_entry->stub_sec->size;
8166 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8167
8168 htab->stub_count[stub_entry->stub_type - 1] += 1;
8169 switch (stub_entry->stub_type)
8170 {
8171 case ppc_stub_long_branch:
8172 case ppc_stub_long_branch_r2off:
8173 /* Branches are relative. This is where we are going to. */
8174 off = dest = (stub_entry->target_value
8175 + stub_entry->target_section->output_offset
8176 + stub_entry->target_section->output_section->vma);
8177
8178 /* And this is where we are coming from. */
8179 off -= (stub_entry->stub_offset
8180 + stub_entry->stub_sec->output_offset
8181 + stub_entry->stub_sec->output_section->vma);
8182
8183 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
8184 size = 4;
8185 else
8186 {
8187 bfd_vma r2off;
8188
8189 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8190 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8191 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8192 loc += 4;
8193 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8194 loc += 4;
8195 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8196 loc += 4;
8197 off -= 12;
8198 size = 16;
8199 }
8200 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8201
8202 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8203 {
8204 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8205 stub_entry->root.string);
8206 htab->stub_error = TRUE;
8207 return FALSE;
8208 }
8209
8210 if (info->emitrelocations)
8211 {
8212 Elf_Internal_Rela *relocs, *r;
8213 struct bfd_elf_section_data *elfsec_data;
8214
8215 elfsec_data = elf_section_data (stub_entry->stub_sec);
8216 relocs = elfsec_data->relocs;
8217 if (relocs == NULL)
8218 {
8219 bfd_size_type relsize;
8220 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8221 relocs = bfd_alloc (htab->stub_bfd, relsize);
8222 if (relocs == NULL)
8223 return FALSE;
8224 elfsec_data->relocs = relocs;
8225 elfsec_data->rel_hdr.sh_size = relsize;
8226 elfsec_data->rel_hdr.sh_entsize = 24;
8227 stub_entry->stub_sec->reloc_count = 0;
8228 }
8229 r = relocs + stub_entry->stub_sec->reloc_count;
8230 stub_entry->stub_sec->reloc_count += 1;
8231 r->r_offset = loc - stub_entry->stub_sec->contents;
8232 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8233 r->r_addend = dest;
8234 if (stub_entry->h != NULL)
8235 {
8236 struct elf_link_hash_entry **hashes;
8237 unsigned long symndx;
8238 struct ppc_link_hash_entry *h;
8239
8240 hashes = elf_sym_hashes (htab->stub_bfd);
8241 if (hashes == NULL)
8242 {
8243 bfd_size_type hsize;
8244
8245 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8246 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8247 if (hashes == NULL)
8248 return FALSE;
8249 elf_sym_hashes (htab->stub_bfd) = hashes;
8250 htab->stub_globals = 1;
8251 }
8252 symndx = htab->stub_globals++;
8253 h = stub_entry->h;
8254 hashes[symndx] = &h->elf;
8255 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8256 if (h->oh != NULL && h->oh->is_func)
8257 h = h->oh;
8258 if (h->elf.root.u.def.section != stub_entry->target_section)
8259 /* H is an opd symbol. The addend must be zero. */
8260 r->r_addend = 0;
8261 else
8262 {
8263 off = (h->elf.root.u.def.value
8264 + h->elf.root.u.def.section->output_offset
8265 + h->elf.root.u.def.section->output_section->vma);
8266 r->r_addend -= off;
8267 }
8268 }
8269 }
8270 break;
8271
8272 case ppc_stub_plt_branch:
8273 case ppc_stub_plt_branch_r2off:
8274 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8275 stub_entry->root.string + 9,
8276 FALSE, FALSE);
8277 if (br_entry == NULL)
8278 {
8279 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8280 stub_entry->root.string);
8281 htab->stub_error = TRUE;
8282 return FALSE;
8283 }
8284
8285 off = (stub_entry->target_value
8286 + stub_entry->target_section->output_offset
8287 + stub_entry->target_section->output_section->vma);
8288
8289 bfd_put_64 (htab->brlt->owner, off,
8290 htab->brlt->contents + br_entry->offset);
8291
8292 if (htab->relbrlt != NULL)
8293 {
8294 /* Create a reloc for the branch lookup table entry. */
8295 Elf_Internal_Rela rela;
8296 bfd_byte *rl;
8297
8298 rela.r_offset = (br_entry->offset
8299 + htab->brlt->output_offset
8300 + htab->brlt->output_section->vma);
8301 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8302 rela.r_addend = off;
8303
8304 rl = htab->relbrlt->contents;
8305 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
8306 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8307 }
8308
8309 off = (br_entry->offset
8310 + htab->brlt->output_offset
8311 + htab->brlt->output_section->vma
8312 - elf_gp (htab->brlt->output_section->owner)
8313 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8314
8315 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8316 {
8317 (*_bfd_error_handler)
8318 (_("linkage table error against `%s'"),
8319 stub_entry->root.string);
8320 bfd_set_error (bfd_error_bad_value);
8321 htab->stub_error = TRUE;
8322 return FALSE;
8323 }
8324
8325 indx = off;
8326 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8327 {
8328 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8329 loc += 4;
8330 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8331 size = 16;
8332 }
8333 else
8334 {
8335 bfd_vma r2off;
8336
8337 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8338 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8339 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8340 loc += 4;
8341 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8342 loc += 4;
8343 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8344 loc += 4;
8345 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8346 loc += 4;
8347 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8348 size = 28;
8349 }
8350 loc += 4;
8351 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8352 loc += 4;
8353 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8354 break;
8355
8356 case ppc_stub_plt_call:
8357 /* Do the best we can for shared libraries built without
8358 exporting ".foo" for each "foo". This can happen when symbol
8359 versioning scripts strip all bar a subset of symbols. */
8360 if (stub_entry->h->oh != NULL
8361 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8362 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8363 {
8364 /* Point the symbol at the stub. There may be multiple stubs,
8365 we don't really care; The main thing is to make this sym
8366 defined somewhere. Maybe defining the symbol in the stub
8367 section is a silly idea. If we didn't do this, htab->top_id
8368 could disappear. */
8369 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8370 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8371 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8372 }
8373
8374 /* Now build the stub. */
8375 off = (bfd_vma) -1;
8376 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8377 if (ent->addend == stub_entry->addend)
8378 {
8379 off = ent->plt.offset;
8380 break;
8381 }
8382 if (off >= (bfd_vma) -2)
8383 abort ();
8384
8385 off &= ~ (bfd_vma) 1;
8386 off += (htab->plt->output_offset
8387 + htab->plt->output_section->vma
8388 - elf_gp (htab->plt->output_section->owner)
8389 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8390
8391 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8392 {
8393 (*_bfd_error_handler)
8394 (_("linkage table error against `%s'"),
8395 stub_entry->h->elf.root.root.string);
8396 bfd_set_error (bfd_error_bad_value);
8397 htab->stub_error = TRUE;
8398 return FALSE;
8399 }
8400
8401 p = build_plt_stub (htab->stub_bfd, loc, off);
8402 size = p - loc;
8403 break;
8404
8405 default:
8406 BFD_FAIL ();
8407 return FALSE;
8408 }
8409
8410 stub_entry->stub_sec->size += size;
8411
8412 if (htab->emit_stub_syms)
8413 {
8414 struct elf_link_hash_entry *h;
8415 size_t len1, len2;
8416 char *name;
8417 const char *const stub_str[] = { "long_branch",
8418 "long_branch_r2off",
8419 "plt_branch",
8420 "plt_branch_r2off",
8421 "plt_call" };
8422
8423 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8424 len2 = strlen (stub_entry->root.string);
8425 name = bfd_malloc (len1 + len2 + 2);
8426 if (name == NULL)
8427 return FALSE;
8428 memcpy (name, stub_entry->root.string, 9);
8429 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8430 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8431 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8432 if (h == NULL)
8433 return FALSE;
8434 if (h->root.type == bfd_link_hash_new)
8435 {
8436 h->root.type = bfd_link_hash_defined;
8437 h->root.u.def.section = stub_entry->stub_sec;
8438 h->root.u.def.value = stub_entry->stub_offset;
8439 h->ref_regular = 1;
8440 h->def_regular = 1;
8441 h->ref_regular_nonweak = 1;
8442 h->forced_local = 1;
8443 h->non_elf = 0;
8444 }
8445 }
8446
8447 return TRUE;
8448 }
8449
8450 /* As above, but don't actually build the stub. Just bump offset so
8451 we know stub section sizes, and select plt_branch stubs where
8452 long_branch stubs won't do. */
8453
8454 static bfd_boolean
8455 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8456 {
8457 struct ppc_stub_hash_entry *stub_entry;
8458 struct bfd_link_info *info;
8459 struct ppc_link_hash_table *htab;
8460 bfd_vma off;
8461 int size;
8462
8463 /* Massage our args to the form they really have. */
8464 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8465 info = in_arg;
8466
8467 htab = ppc_hash_table (info);
8468
8469 if (stub_entry->stub_type == ppc_stub_plt_call)
8470 {
8471 struct plt_entry *ent;
8472 off = (bfd_vma) -1;
8473 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8474 if (ent->addend == stub_entry->addend)
8475 {
8476 off = ent->plt.offset & ~(bfd_vma) 1;
8477 break;
8478 }
8479 if (off >= (bfd_vma) -2)
8480 abort ();
8481 off += (htab->plt->output_offset
8482 + htab->plt->output_section->vma
8483 - elf_gp (htab->plt->output_section->owner)
8484 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8485
8486 size = PLT_CALL_STUB_SIZE;
8487 if (PPC_HA (off + 16) != PPC_HA (off))
8488 size += 4;
8489 }
8490 else
8491 {
8492 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8493 variants. */
8494 off = (stub_entry->target_value
8495 + stub_entry->target_section->output_offset
8496 + stub_entry->target_section->output_section->vma);
8497 off -= (stub_entry->stub_sec->size
8498 + stub_entry->stub_sec->output_offset
8499 + stub_entry->stub_sec->output_section->vma);
8500
8501 /* Reset the stub type from the plt variant in case we now
8502 can reach with a shorter stub. */
8503 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8504 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8505
8506 size = 4;
8507 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8508 {
8509 off -= 12;
8510 size = 16;
8511 }
8512
8513 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8514 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8515 {
8516 struct ppc_branch_hash_entry *br_entry;
8517
8518 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8519 stub_entry->root.string + 9,
8520 TRUE, FALSE);
8521 if (br_entry == NULL)
8522 {
8523 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8524 stub_entry->root.string);
8525 htab->stub_error = TRUE;
8526 return FALSE;
8527 }
8528
8529 if (br_entry->iter != htab->stub_iteration)
8530 {
8531 br_entry->iter = htab->stub_iteration;
8532 br_entry->offset = htab->brlt->size;
8533 htab->brlt->size += 8;
8534
8535 if (htab->relbrlt != NULL)
8536 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8537 }
8538
8539 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8540 size = 16;
8541 if (stub_entry->stub_type != ppc_stub_plt_branch)
8542 size = 28;
8543 }
8544
8545 if (info->emitrelocations
8546 && (stub_entry->stub_type == ppc_stub_long_branch
8547 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8548 stub_entry->stub_sec->reloc_count += 1;
8549 }
8550
8551 stub_entry->stub_sec->size += size;
8552 return TRUE;
8553 }
8554
8555 /* Set up various things so that we can make a list of input sections
8556 for each output section included in the link. Returns -1 on error,
8557 0 when no stubs will be needed, and 1 on success. */
8558
8559 int
8560 ppc64_elf_setup_section_lists (bfd *output_bfd,
8561 struct bfd_link_info *info,
8562 int no_multi_toc)
8563 {
8564 bfd *input_bfd;
8565 int top_id, top_index, id;
8566 asection *section;
8567 asection **input_list;
8568 bfd_size_type amt;
8569 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8570
8571 htab->no_multi_toc = no_multi_toc;
8572
8573 if (htab->brlt == NULL)
8574 return 0;
8575
8576 /* Find the top input section id. */
8577 for (input_bfd = info->input_bfds, top_id = 3;
8578 input_bfd != NULL;
8579 input_bfd = input_bfd->link_next)
8580 {
8581 for (section = input_bfd->sections;
8582 section != NULL;
8583 section = section->next)
8584 {
8585 if (top_id < section->id)
8586 top_id = section->id;
8587 }
8588 }
8589
8590 htab->top_id = top_id;
8591 amt = sizeof (struct map_stub) * (top_id + 1);
8592 htab->stub_group = bfd_zmalloc (amt);
8593 if (htab->stub_group == NULL)
8594 return -1;
8595
8596 /* Set toc_off for com, und, abs and ind sections. */
8597 for (id = 0; id < 3; id++)
8598 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8599
8600 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8601
8602 /* We can't use output_bfd->section_count here to find the top output
8603 section index as some sections may have been removed, and
8604 strip_excluded_output_sections doesn't renumber the indices. */
8605 for (section = output_bfd->sections, top_index = 0;
8606 section != NULL;
8607 section = section->next)
8608 {
8609 if (top_index < section->index)
8610 top_index = section->index;
8611 }
8612
8613 htab->top_index = top_index;
8614 amt = sizeof (asection *) * (top_index + 1);
8615 input_list = bfd_zmalloc (amt);
8616 htab->input_list = input_list;
8617 if (input_list == NULL)
8618 return -1;
8619
8620 return 1;
8621 }
8622
8623 /* The linker repeatedly calls this function for each TOC input section
8624 and linker generated GOT section. Group input bfds such that the toc
8625 within a group is less than 64k in size. Will break with cute linker
8626 scripts that play games with dot in the output toc section. */
8627
8628 void
8629 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8630 {
8631 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8632
8633 if (!htab->no_multi_toc)
8634 {
8635 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8636 bfd_vma off = addr - htab->toc_curr;
8637
8638 if (off + isec->size > 0x10000)
8639 htab->toc_curr = addr;
8640
8641 elf_gp (isec->owner) = (htab->toc_curr
8642 - elf_gp (isec->output_section->owner)
8643 + TOC_BASE_OFF);
8644 }
8645 }
8646
8647 /* Called after the last call to the above function. */
8648
8649 void
8650 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8651 {
8652 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8653
8654 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8655
8656 /* toc_curr tracks the TOC offset used for code sections below in
8657 ppc64_elf_next_input_section. Start off at 0x8000. */
8658 htab->toc_curr = TOC_BASE_OFF;
8659 }
8660
8661 /* No toc references were found in ISEC. If the code in ISEC makes no
8662 calls, then there's no need to use toc adjusting stubs when branching
8663 into ISEC. Actually, indirect calls from ISEC are OK as they will
8664 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8665 needed, and 2 if a cyclical call-graph was found but no other reason
8666 for a stub was detected. If called from the top level, a return of
8667 2 means the same as a return of 0. */
8668
8669 static int
8670 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8671 {
8672 Elf_Internal_Rela *relstart, *rel;
8673 Elf_Internal_Sym *local_syms;
8674 int ret;
8675 struct ppc_link_hash_table *htab;
8676
8677 /* We know none of our code bearing sections will need toc stubs. */
8678 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8679 return 0;
8680
8681 if (isec->size == 0)
8682 return 0;
8683
8684 if (isec->output_section == NULL)
8685 return 0;
8686
8687 /* Hack for linux kernel. .fixup contains branches, but only back to
8688 the function that hit an exception. */
8689 if (strcmp (isec->name, ".fixup") == 0)
8690 return 0;
8691
8692 if (isec->reloc_count == 0)
8693 return 0;
8694
8695 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8696 info->keep_memory);
8697 if (relstart == NULL)
8698 return -1;
8699
8700 /* Look for branches to outside of this section. */
8701 local_syms = NULL;
8702 ret = 0;
8703 htab = ppc_hash_table (info);
8704 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8705 {
8706 enum elf_ppc64_reloc_type r_type;
8707 unsigned long r_symndx;
8708 struct elf_link_hash_entry *h;
8709 Elf_Internal_Sym *sym;
8710 asection *sym_sec;
8711 long *opd_adjust;
8712 bfd_vma sym_value;
8713 bfd_vma dest;
8714
8715 r_type = ELF64_R_TYPE (rel->r_info);
8716 if (r_type != R_PPC64_REL24
8717 && r_type != R_PPC64_REL14
8718 && r_type != R_PPC64_REL14_BRTAKEN
8719 && r_type != R_PPC64_REL14_BRNTAKEN)
8720 continue;
8721
8722 r_symndx = ELF64_R_SYM (rel->r_info);
8723 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8724 isec->owner))
8725 {
8726 ret = -1;
8727 break;
8728 }
8729
8730 /* Calls to dynamic lib functions go through a plt call stub
8731 that uses r2. Branches to undefined symbols might be a call
8732 using old-style dot symbols that can be satisfied by a plt
8733 call into a new-style dynamic library. */
8734 if (sym_sec == NULL)
8735 {
8736 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8737 if (eh != NULL
8738 && eh->oh != NULL
8739 && eh->oh->elf.plt.plist != NULL)
8740 {
8741 ret = 1;
8742 break;
8743 }
8744
8745 /* Ignore other undefined symbols. */
8746 continue;
8747 }
8748
8749 /* Assume branches to other sections not included in the link need
8750 stubs too, to cover -R and absolute syms. */
8751 if (sym_sec->output_section == NULL)
8752 {
8753 ret = 1;
8754 break;
8755 }
8756
8757 if (h == NULL)
8758 sym_value = sym->st_value;
8759 else
8760 {
8761 if (h->root.type != bfd_link_hash_defined
8762 && h->root.type != bfd_link_hash_defweak)
8763 abort ();
8764 sym_value = h->root.u.def.value;
8765 }
8766 sym_value += rel->r_addend;
8767
8768 /* If this branch reloc uses an opd sym, find the code section. */
8769 opd_adjust = get_opd_info (sym_sec);
8770 if (opd_adjust != NULL)
8771 {
8772 if (h == NULL)
8773 {
8774 long adjust;
8775
8776 adjust = opd_adjust[sym->st_value / 8];
8777 if (adjust == -1)
8778 /* Assume deleted functions won't ever be called. */
8779 continue;
8780 sym_value += adjust;
8781 }
8782
8783 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
8784 if (dest == (bfd_vma) -1)
8785 continue;
8786 }
8787 else
8788 dest = (sym_value
8789 + sym_sec->output_offset
8790 + sym_sec->output_section->vma);
8791
8792 /* Ignore branch to self. */
8793 if (sym_sec == isec)
8794 continue;
8795
8796 /* If the called function uses the toc, we need a stub. */
8797 if (sym_sec->has_toc_reloc
8798 || sym_sec->makes_toc_func_call)
8799 {
8800 ret = 1;
8801 break;
8802 }
8803
8804 /* Assume any branch that needs a long branch stub might in fact
8805 need a plt_branch stub. A plt_branch stub uses r2. */
8806 else if (dest - (isec->output_offset
8807 + isec->output_section->vma
8808 + rel->r_offset) + (1 << 25) >= (2 << 25))
8809 {
8810 ret = 1;
8811 break;
8812 }
8813
8814 /* If calling back to a section in the process of being tested, we
8815 can't say for sure that no toc adjusting stubs are needed, so
8816 don't return zero. */
8817 else if (sym_sec->call_check_in_progress)
8818 ret = 2;
8819
8820 /* Branches to another section that itself doesn't have any TOC
8821 references are OK. Recursively call ourselves to check. */
8822 else if (sym_sec->id <= htab->top_id
8823 && htab->stub_group[sym_sec->id].toc_off == 0)
8824 {
8825 int recur;
8826
8827 /* Mark current section as indeterminate, so that other
8828 sections that call back to current won't be marked as
8829 known. */
8830 isec->call_check_in_progress = 1;
8831 recur = toc_adjusting_stub_needed (info, sym_sec);
8832 isec->call_check_in_progress = 0;
8833
8834 if (recur < 0)
8835 {
8836 /* An error. Exit. */
8837 ret = -1;
8838 break;
8839 }
8840 else if (recur <= 1)
8841 {
8842 /* Known result. Mark as checked and set section flag. */
8843 htab->stub_group[sym_sec->id].toc_off = 1;
8844 if (recur != 0)
8845 {
8846 sym_sec->makes_toc_func_call = 1;
8847 ret = 1;
8848 break;
8849 }
8850 }
8851 else
8852 {
8853 /* Unknown result. Continue checking. */
8854 ret = 2;
8855 }
8856 }
8857 }
8858
8859 if (local_syms != NULL
8860 && (elf_tdata (isec->owner)->symtab_hdr.contents
8861 != (unsigned char *) local_syms))
8862 free (local_syms);
8863 if (elf_section_data (isec)->relocs != relstart)
8864 free (relstart);
8865
8866 return ret;
8867 }
8868
8869 /* The linker repeatedly calls this function for each input section,
8870 in the order that input sections are linked into output sections.
8871 Build lists of input sections to determine groupings between which
8872 we may insert linker stubs. */
8873
8874 bfd_boolean
8875 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
8876 {
8877 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8878
8879 if ((isec->output_section->flags & SEC_CODE) != 0
8880 && isec->output_section->index <= htab->top_index)
8881 {
8882 asection **list = htab->input_list + isec->output_section->index;
8883 /* Steal the link_sec pointer for our list. */
8884 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
8885 /* This happens to make the list in reverse order,
8886 which is what we want. */
8887 PREV_SEC (isec) = *list;
8888 *list = isec;
8889 }
8890
8891 if (htab->multi_toc_needed)
8892 {
8893 /* If a code section has a function that uses the TOC then we need
8894 to use the right TOC (obviously). Also, make sure that .opd gets
8895 the correct TOC value for R_PPC64_TOC relocs that don't have or
8896 can't find their function symbol (shouldn't ever happen now). */
8897 if (isec->has_toc_reloc || (isec->flags & SEC_CODE) == 0)
8898 {
8899 if (elf_gp (isec->owner) != 0)
8900 htab->toc_curr = elf_gp (isec->owner);
8901 }
8902 else if (htab->stub_group[isec->id].toc_off == 0)
8903 {
8904 int ret = toc_adjusting_stub_needed (info, isec);
8905 if (ret < 0)
8906 return FALSE;
8907 else
8908 isec->makes_toc_func_call = ret & 1;
8909 }
8910 }
8911
8912 /* Functions that don't use the TOC can belong in any TOC group.
8913 Use the last TOC base. This happens to make _init and _fini
8914 pasting work. */
8915 htab->stub_group[isec->id].toc_off = htab->toc_curr;
8916 return TRUE;
8917 }
8918
8919 /* See whether we can group stub sections together. Grouping stub
8920 sections may result in fewer stubs. More importantly, we need to
8921 put all .init* and .fini* stubs at the beginning of the .init or
8922 .fini output sections respectively, because glibc splits the
8923 _init and _fini functions into multiple parts. Putting a stub in
8924 the middle of a function is not a good idea. */
8925
8926 static void
8927 group_sections (struct ppc_link_hash_table *htab,
8928 bfd_size_type stub_group_size,
8929 bfd_boolean stubs_always_before_branch)
8930 {
8931 asection **list = htab->input_list + htab->top_index;
8932 do
8933 {
8934 asection *tail = *list;
8935 while (tail != NULL)
8936 {
8937 asection *curr;
8938 asection *prev;
8939 bfd_size_type total;
8940 bfd_boolean big_sec;
8941 bfd_vma curr_toc;
8942
8943 curr = tail;
8944 total = tail->size;
8945 big_sec = total > stub_group_size;
8946 if (big_sec)
8947 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
8948 tail->owner, tail);
8949 curr_toc = htab->stub_group[tail->id].toc_off;
8950
8951 while ((prev = PREV_SEC (curr)) != NULL
8952 && ((total += curr->output_offset - prev->output_offset)
8953 < stub_group_size)
8954 && htab->stub_group[prev->id].toc_off == curr_toc)
8955 curr = prev;
8956
8957 /* OK, the size from the start of CURR to the end is less
8958 than stub_group_size and thus can be handled by one stub
8959 section. (or the tail section is itself larger than
8960 stub_group_size, in which case we may be toast.) We
8961 should really be keeping track of the total size of stubs
8962 added here, as stubs contribute to the final output
8963 section size. That's a little tricky, and this way will
8964 only break if stubs added make the total size more than
8965 2^25, ie. for the default stub_group_size, if stubs total
8966 more than 2097152 bytes, or nearly 75000 plt call stubs. */
8967 do
8968 {
8969 prev = PREV_SEC (tail);
8970 /* Set up this stub group. */
8971 htab->stub_group[tail->id].link_sec = curr;
8972 }
8973 while (tail != curr && (tail = prev) != NULL);
8974
8975 /* But wait, there's more! Input sections up to stub_group_size
8976 bytes before the stub section can be handled by it too.
8977 Don't do this if we have a really large section after the
8978 stubs, as adding more stubs increases the chance that
8979 branches may not reach into the stub section. */
8980 if (!stubs_always_before_branch && !big_sec)
8981 {
8982 total = 0;
8983 while (prev != NULL
8984 && ((total += tail->output_offset - prev->output_offset)
8985 < stub_group_size)
8986 && htab->stub_group[prev->id].toc_off == curr_toc)
8987 {
8988 tail = prev;
8989 prev = PREV_SEC (tail);
8990 htab->stub_group[tail->id].link_sec = curr;
8991 }
8992 }
8993 tail = prev;
8994 }
8995 }
8996 while (list-- != htab->input_list);
8997 free (htab->input_list);
8998 #undef PREV_SEC
8999 }
9000
9001 /* Determine and set the size of the stub section for a final link.
9002
9003 The basic idea here is to examine all the relocations looking for
9004 PC-relative calls to a target that is unreachable with a "bl"
9005 instruction. */
9006
9007 bfd_boolean
9008 ppc64_elf_size_stubs (bfd *output_bfd,
9009 struct bfd_link_info *info,
9010 bfd_signed_vma group_size,
9011 asection *(*add_stub_section) (const char *, asection *),
9012 void (*layout_sections_again) (void))
9013 {
9014 bfd_size_type stub_group_size;
9015 bfd_boolean stubs_always_before_branch;
9016 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9017
9018 /* Stash our params away. */
9019 htab->add_stub_section = add_stub_section;
9020 htab->layout_sections_again = layout_sections_again;
9021 stubs_always_before_branch = group_size < 0;
9022 if (group_size < 0)
9023 stub_group_size = -group_size;
9024 else
9025 stub_group_size = group_size;
9026 if (stub_group_size == 1)
9027 {
9028 /* Default values. */
9029 if (stubs_always_before_branch)
9030 {
9031 stub_group_size = 0x1e00000;
9032 if (htab->has_14bit_branch)
9033 stub_group_size = 0x7800;
9034 }
9035 else
9036 {
9037 stub_group_size = 0x1c00000;
9038 if (htab->has_14bit_branch)
9039 stub_group_size = 0x7000;
9040 }
9041 }
9042
9043 group_sections (htab, stub_group_size, stubs_always_before_branch);
9044
9045 while (1)
9046 {
9047 bfd *input_bfd;
9048 unsigned int bfd_indx;
9049 asection *stub_sec;
9050
9051 htab->stub_iteration += 1;
9052
9053 for (input_bfd = info->input_bfds, bfd_indx = 0;
9054 input_bfd != NULL;
9055 input_bfd = input_bfd->link_next, bfd_indx++)
9056 {
9057 Elf_Internal_Shdr *symtab_hdr;
9058 asection *section;
9059 Elf_Internal_Sym *local_syms = NULL;
9060
9061 if (!is_ppc64_elf_target (input_bfd->xvec))
9062 continue;
9063
9064 /* We'll need the symbol table in a second. */
9065 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9066 if (symtab_hdr->sh_info == 0)
9067 continue;
9068
9069 /* Walk over each section attached to the input bfd. */
9070 for (section = input_bfd->sections;
9071 section != NULL;
9072 section = section->next)
9073 {
9074 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9075
9076 /* If there aren't any relocs, then there's nothing more
9077 to do. */
9078 if ((section->flags & SEC_RELOC) == 0
9079 || section->reloc_count == 0)
9080 continue;
9081
9082 /* If this section is a link-once section that will be
9083 discarded, then don't create any stubs. */
9084 if (section->output_section == NULL
9085 || section->output_section->owner != output_bfd)
9086 continue;
9087
9088 /* Get the relocs. */
9089 internal_relocs
9090 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9091 info->keep_memory);
9092 if (internal_relocs == NULL)
9093 goto error_ret_free_local;
9094
9095 /* Now examine each relocation. */
9096 irela = internal_relocs;
9097 irelaend = irela + section->reloc_count;
9098 for (; irela < irelaend; irela++)
9099 {
9100 enum elf_ppc64_reloc_type r_type;
9101 unsigned int r_indx;
9102 enum ppc_stub_type stub_type;
9103 struct ppc_stub_hash_entry *stub_entry;
9104 asection *sym_sec, *code_sec;
9105 bfd_vma sym_value;
9106 bfd_vma destination;
9107 bfd_boolean ok_dest;
9108 struct ppc_link_hash_entry *hash;
9109 struct ppc_link_hash_entry *fdh;
9110 struct elf_link_hash_entry *h;
9111 Elf_Internal_Sym *sym;
9112 char *stub_name;
9113 const asection *id_sec;
9114 long *opd_adjust;
9115
9116 r_type = ELF64_R_TYPE (irela->r_info);
9117 r_indx = ELF64_R_SYM (irela->r_info);
9118
9119 if (r_type >= R_PPC64_max)
9120 {
9121 bfd_set_error (bfd_error_bad_value);
9122 goto error_ret_free_internal;
9123 }
9124
9125 /* Only look for stubs on branch instructions. */
9126 if (r_type != R_PPC64_REL24
9127 && r_type != R_PPC64_REL14
9128 && r_type != R_PPC64_REL14_BRTAKEN
9129 && r_type != R_PPC64_REL14_BRNTAKEN)
9130 continue;
9131
9132 /* Now determine the call target, its name, value,
9133 section. */
9134 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9135 r_indx, input_bfd))
9136 goto error_ret_free_internal;
9137 hash = (struct ppc_link_hash_entry *) h;
9138
9139 ok_dest = FALSE;
9140 fdh = NULL;
9141 sym_value = 0;
9142 if (hash == NULL)
9143 {
9144 sym_value = sym->st_value;
9145 ok_dest = TRUE;
9146 }
9147 else if (hash->elf.root.type == bfd_link_hash_defined
9148 || hash->elf.root.type == bfd_link_hash_defweak)
9149 {
9150 sym_value = hash->elf.root.u.def.value;
9151 if (sym_sec->output_section != NULL)
9152 ok_dest = TRUE;
9153 }
9154 else if (hash->elf.root.type == bfd_link_hash_undefweak
9155 || hash->elf.root.type == bfd_link_hash_undefined)
9156 {
9157 /* Recognise an old ABI func code entry sym, and
9158 use the func descriptor sym instead if it is
9159 defined. */
9160 if (hash->elf.root.root.string[0] == '.'
9161 && (fdh = get_fdh (hash, htab)) != NULL)
9162 {
9163 if (fdh->elf.root.type == bfd_link_hash_defined
9164 || fdh->elf.root.type == bfd_link_hash_defweak)
9165 {
9166 sym_sec = fdh->elf.root.u.def.section;
9167 sym_value = fdh->elf.root.u.def.value;
9168 if (sym_sec->output_section != NULL)
9169 ok_dest = TRUE;
9170 }
9171 else
9172 fdh = NULL;
9173 }
9174 }
9175 else
9176 {
9177 bfd_set_error (bfd_error_bad_value);
9178 goto error_ret_free_internal;
9179 }
9180
9181 destination = 0;
9182 if (ok_dest)
9183 {
9184 sym_value += irela->r_addend;
9185 destination = (sym_value
9186 + sym_sec->output_offset
9187 + sym_sec->output_section->vma);
9188 }
9189
9190 code_sec = sym_sec;
9191 opd_adjust = get_opd_info (sym_sec);
9192 if (opd_adjust != NULL)
9193 {
9194 bfd_vma dest;
9195
9196 if (hash == NULL)
9197 {
9198 long adjust = opd_adjust[sym_value / 8];
9199 if (adjust == -1)
9200 continue;
9201 sym_value += adjust;
9202 }
9203 dest = opd_entry_value (sym_sec, sym_value,
9204 &code_sec, &sym_value);
9205 if (dest != (bfd_vma) -1)
9206 {
9207 destination = dest;
9208 if (fdh != NULL)
9209 {
9210 /* Fixup old ABI sym to point at code
9211 entry. */
9212 hash->elf.root.type = bfd_link_hash_defweak;
9213 hash->elf.root.u.def.section = code_sec;
9214 hash->elf.root.u.def.value = sym_value;
9215 }
9216 }
9217 }
9218
9219 /* Determine what (if any) linker stub is needed. */
9220 stub_type = ppc_type_of_stub (section, irela, &hash,
9221 destination);
9222
9223 if (stub_type != ppc_stub_plt_call)
9224 {
9225 /* Check whether we need a TOC adjusting stub.
9226 Since the linker pastes together pieces from
9227 different object files when creating the
9228 _init and _fini functions, it may be that a
9229 call to what looks like a local sym is in
9230 fact a call needing a TOC adjustment. */
9231 if (code_sec != NULL
9232 && code_sec->output_section != NULL
9233 && (htab->stub_group[code_sec->id].toc_off
9234 != htab->stub_group[section->id].toc_off)
9235 && (code_sec->has_toc_reloc
9236 || code_sec->makes_toc_func_call))
9237 stub_type = ppc_stub_long_branch_r2off;
9238 }
9239
9240 if (stub_type == ppc_stub_none)
9241 continue;
9242
9243 /* __tls_get_addr calls might be eliminated. */
9244 if (stub_type != ppc_stub_plt_call
9245 && hash != NULL
9246 && (hash == htab->tls_get_addr
9247 || hash == htab->tls_get_addr_fd)
9248 && section->has_tls_reloc
9249 && irela != internal_relocs)
9250 {
9251 /* Get tls info. */
9252 char *tls_mask;
9253
9254 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9255 irela - 1, input_bfd))
9256 goto error_ret_free_internal;
9257 if (*tls_mask != 0)
9258 continue;
9259 }
9260
9261 /* Support for grouping stub sections. */
9262 id_sec = htab->stub_group[section->id].link_sec;
9263
9264 /* Get the name of this stub. */
9265 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9266 if (!stub_name)
9267 goto error_ret_free_internal;
9268
9269 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9270 stub_name, FALSE, FALSE);
9271 if (stub_entry != NULL)
9272 {
9273 /* The proper stub has already been created. */
9274 free (stub_name);
9275 continue;
9276 }
9277
9278 stub_entry = ppc_add_stub (stub_name, section, htab);
9279 if (stub_entry == NULL)
9280 {
9281 free (stub_name);
9282 error_ret_free_internal:
9283 if (elf_section_data (section)->relocs == NULL)
9284 free (internal_relocs);
9285 error_ret_free_local:
9286 if (local_syms != NULL
9287 && (symtab_hdr->contents
9288 != (unsigned char *) local_syms))
9289 free (local_syms);
9290 return FALSE;
9291 }
9292
9293 stub_entry->stub_type = stub_type;
9294 stub_entry->target_value = sym_value;
9295 stub_entry->target_section = code_sec;
9296 stub_entry->h = hash;
9297 stub_entry->addend = irela->r_addend;
9298
9299 if (stub_entry->h != NULL)
9300 htab->stub_globals += 1;
9301 }
9302
9303 /* We're done with the internal relocs, free them. */
9304 if (elf_section_data (section)->relocs != internal_relocs)
9305 free (internal_relocs);
9306 }
9307
9308 if (local_syms != NULL
9309 && symtab_hdr->contents != (unsigned char *) local_syms)
9310 {
9311 if (!info->keep_memory)
9312 free (local_syms);
9313 else
9314 symtab_hdr->contents = (unsigned char *) local_syms;
9315 }
9316 }
9317
9318 /* We may have added some stubs. Find out the new size of the
9319 stub sections. */
9320 for (stub_sec = htab->stub_bfd->sections;
9321 stub_sec != NULL;
9322 stub_sec = stub_sec->next)
9323 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9324 {
9325 stub_sec->rawsize = stub_sec->size;
9326 stub_sec->size = 0;
9327 stub_sec->reloc_count = 0;
9328 }
9329
9330 htab->brlt->size = 0;
9331 if (htab->relbrlt != NULL)
9332 htab->relbrlt->size = 0;
9333
9334 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9335
9336 for (stub_sec = htab->stub_bfd->sections;
9337 stub_sec != NULL;
9338 stub_sec = stub_sec->next)
9339 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9340 && stub_sec->rawsize != stub_sec->size)
9341 break;
9342
9343 /* Exit from this loop when no stubs have been added, and no stubs
9344 have changed size. */
9345 if (stub_sec == NULL)
9346 break;
9347
9348 /* Ask the linker to do its stuff. */
9349 (*htab->layout_sections_again) ();
9350 }
9351
9352 /* It would be nice to strip htab->brlt from the output if the
9353 section is empty, but it's too late. If we strip sections here,
9354 the dynamic symbol table is corrupted since the section symbol
9355 for the stripped section isn't written. */
9356
9357 return TRUE;
9358 }
9359
9360 /* Called after we have determined section placement. If sections
9361 move, we'll be called again. Provide a value for TOCstart. */
9362
9363 bfd_vma
9364 ppc64_elf_toc (bfd *obfd)
9365 {
9366 asection *s;
9367 bfd_vma TOCstart;
9368
9369 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9370 order. The TOC starts where the first of these sections starts. */
9371 s = bfd_get_section_by_name (obfd, ".got");
9372 if (s == NULL)
9373 s = bfd_get_section_by_name (obfd, ".toc");
9374 if (s == NULL)
9375 s = bfd_get_section_by_name (obfd, ".tocbss");
9376 if (s == NULL)
9377 s = bfd_get_section_by_name (obfd, ".plt");
9378 if (s == NULL)
9379 {
9380 /* This may happen for
9381 o references to TOC base (SYM@toc / TOC[tc0]) without a
9382 .toc directive
9383 o bad linker script
9384 o --gc-sections and empty TOC sections
9385
9386 FIXME: Warn user? */
9387
9388 /* Look for a likely section. We probably won't even be
9389 using TOCstart. */
9390 for (s = obfd->sections; s != NULL; s = s->next)
9391 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9392 == (SEC_ALLOC | SEC_SMALL_DATA))
9393 break;
9394 if (s == NULL)
9395 for (s = obfd->sections; s != NULL; s = s->next)
9396 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9397 == (SEC_ALLOC | SEC_SMALL_DATA))
9398 break;
9399 if (s == NULL)
9400 for (s = obfd->sections; s != NULL; s = s->next)
9401 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9402 break;
9403 if (s == NULL)
9404 for (s = obfd->sections; s != NULL; s = s->next)
9405 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9406 break;
9407 }
9408
9409 TOCstart = 0;
9410 if (s != NULL)
9411 TOCstart = s->output_section->vma + s->output_offset;
9412
9413 return TOCstart;
9414 }
9415
9416 /* Build all the stubs associated with the current output file.
9417 The stubs are kept in a hash table attached to the main linker
9418 hash table. This function is called via gldelf64ppc_finish. */
9419
9420 bfd_boolean
9421 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9422 struct bfd_link_info *info,
9423 char **stats)
9424 {
9425 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9426 asection *stub_sec;
9427 bfd_byte *p;
9428 int stub_sec_count = 0;
9429
9430 htab->emit_stub_syms = emit_stub_syms;
9431
9432 /* Allocate memory to hold the linker stubs. */
9433 for (stub_sec = htab->stub_bfd->sections;
9434 stub_sec != NULL;
9435 stub_sec = stub_sec->next)
9436 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9437 && stub_sec->size != 0)
9438 {
9439 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9440 if (stub_sec->contents == NULL)
9441 return FALSE;
9442 /* We want to check that built size is the same as calculated
9443 size. rawsize is a convenient location to use. */
9444 stub_sec->rawsize = stub_sec->size;
9445 stub_sec->size = 0;
9446 }
9447
9448 if (htab->plt != NULL)
9449 {
9450 unsigned int indx;
9451 bfd_vma plt0;
9452
9453 /* Build the .glink plt call stub. */
9454 plt0 = (htab->plt->output_section->vma
9455 + htab->plt->output_offset
9456 - (htab->glink->output_section->vma
9457 + htab->glink->output_offset
9458 + GLINK_CALL_STUB_SIZE));
9459 if (plt0 + 0x80008000 > 0xffffffff)
9460 {
9461 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
9462 bfd_set_error (bfd_error_bad_value);
9463 return FALSE;
9464 }
9465
9466 if (htab->emit_stub_syms)
9467 {
9468 struct elf_link_hash_entry *h;
9469 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9470 if (h == NULL)
9471 return FALSE;
9472 if (h->root.type == bfd_link_hash_new)
9473 {
9474 h->root.type = bfd_link_hash_defined;
9475 h->root.u.def.section = htab->glink;
9476 h->root.u.def.value = 0;
9477 h->ref_regular = 1;
9478 h->def_regular = 1;
9479 h->ref_regular_nonweak = 1;
9480 h->forced_local = 1;
9481 h->non_elf = 0;
9482 }
9483 }
9484 p = htab->glink->contents;
9485 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
9486 p += 4;
9487 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
9488 p += 4;
9489 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
9490 p += 4;
9491 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9492 p += 4;
9493 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
9494 p += 4;
9495 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
9496 p += 4;
9497 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
9498 p += 4;
9499 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
9500 p += 4;
9501 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
9502 p += 4;
9503 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
9504 p += 4;
9505 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
9506 p += 4;
9507 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
9508 p += 4;
9509 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9510 p += 4;
9511 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9512 p += 4;
9513 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9514 p += 4;
9515 bfd_put_32 (htab->glink->owner, BCTR, p);
9516 p += 4;
9517
9518 /* Build the .glink lazy link call stubs. */
9519 indx = 0;
9520 while (p < htab->glink->contents + htab->glink->size)
9521 {
9522 if (indx < 0x8000)
9523 {
9524 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9525 p += 4;
9526 }
9527 else
9528 {
9529 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9530 p += 4;
9531 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9532 p += 4;
9533 }
9534 bfd_put_32 (htab->glink->owner,
9535 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
9536 indx++;
9537 p += 4;
9538 }
9539 htab->glink->rawsize = p - htab->glink->contents;
9540 }
9541
9542 if (htab->brlt->size != 0)
9543 {
9544 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9545 htab->brlt->size);
9546 if (htab->brlt->contents == NULL)
9547 return FALSE;
9548 }
9549 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9550 {
9551 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9552 htab->relbrlt->size);
9553 if (htab->relbrlt->contents == NULL)
9554 return FALSE;
9555 }
9556
9557 /* Build the stubs as directed by the stub hash table. */
9558 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9559
9560 for (stub_sec = htab->stub_bfd->sections;
9561 stub_sec != NULL;
9562 stub_sec = stub_sec->next)
9563 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9564 {
9565 stub_sec_count += 1;
9566 if (stub_sec->rawsize != stub_sec->size)
9567 break;
9568 }
9569
9570 if (stub_sec != NULL
9571 || htab->glink->rawsize != htab->glink->size)
9572 {
9573 htab->stub_error = TRUE;
9574 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9575 }
9576
9577 if (htab->stub_error)
9578 return FALSE;
9579
9580 if (stats != NULL)
9581 {
9582 *stats = bfd_malloc (500);
9583 if (*stats == NULL)
9584 return FALSE;
9585
9586 sprintf (*stats, _("linker stubs in %u group%s\n"
9587 " branch %lu\n"
9588 " toc adjust %lu\n"
9589 " long branch %lu\n"
9590 " long toc adj %lu\n"
9591 " plt call %lu"),
9592 stub_sec_count,
9593 stub_sec_count == 1 ? "" : "s",
9594 htab->stub_count[ppc_stub_long_branch - 1],
9595 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9596 htab->stub_count[ppc_stub_plt_branch - 1],
9597 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9598 htab->stub_count[ppc_stub_plt_call - 1]);
9599 }
9600 return TRUE;
9601 }
9602
9603 /* This function undoes the changes made by add_symbol_adjust. */
9604
9605 static bfd_boolean
9606 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9607 {
9608 struct ppc_link_hash_entry *eh;
9609
9610 if (h->root.type == bfd_link_hash_indirect)
9611 return TRUE;
9612
9613 if (h->root.type == bfd_link_hash_warning)
9614 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9615
9616 eh = (struct ppc_link_hash_entry *) h;
9617 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9618 return TRUE;
9619
9620 eh->elf.root.type = bfd_link_hash_undefined;
9621 return TRUE;
9622 }
9623
9624 void
9625 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9626 {
9627 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9628 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9629 }
9630
9631 /* What to do when ld finds relocations against symbols defined in
9632 discarded sections. */
9633
9634 static unsigned int
9635 ppc64_elf_action_discarded (asection *sec)
9636 {
9637 if (strcmp (".opd", sec->name) == 0)
9638 return 0;
9639
9640 if (strcmp (".toc", sec->name) == 0)
9641 return 0;
9642
9643 if (strcmp (".toc1", sec->name) == 0)
9644 return 0;
9645
9646 return _bfd_elf_default_action_discarded (sec);
9647 }
9648
9649 /* The RELOCATE_SECTION function is called by the ELF backend linker
9650 to handle the relocations for a section.
9651
9652 The relocs are always passed as Rela structures; if the section
9653 actually uses Rel structures, the r_addend field will always be
9654 zero.
9655
9656 This function is responsible for adjust the section contents as
9657 necessary, and (if using Rela relocs and generating a
9658 relocatable output file) adjusting the reloc addend as
9659 necessary.
9660
9661 This function does not have to worry about setting the reloc
9662 address or the reloc symbol index.
9663
9664 LOCAL_SYMS is a pointer to the swapped in local symbols.
9665
9666 LOCAL_SECTIONS is an array giving the section in the input file
9667 corresponding to the st_shndx field of each local symbol.
9668
9669 The global hash table entry for the global symbols can be found
9670 via elf_sym_hashes (input_bfd).
9671
9672 When generating relocatable output, this function must handle
9673 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9674 going to be the section symbol corresponding to the output
9675 section, which means that the addend must be adjusted
9676 accordingly. */
9677
9678 static bfd_boolean
9679 ppc64_elf_relocate_section (bfd *output_bfd,
9680 struct bfd_link_info *info,
9681 bfd *input_bfd,
9682 asection *input_section,
9683 bfd_byte *contents,
9684 Elf_Internal_Rela *relocs,
9685 Elf_Internal_Sym *local_syms,
9686 asection **local_sections)
9687 {
9688 struct ppc_link_hash_table *htab;
9689 Elf_Internal_Shdr *symtab_hdr;
9690 struct elf_link_hash_entry **sym_hashes;
9691 Elf_Internal_Rela *rel;
9692 Elf_Internal_Rela *relend;
9693 Elf_Internal_Rela outrel;
9694 bfd_byte *loc;
9695 struct got_entry **local_got_ents;
9696 bfd_vma TOCstart;
9697 bfd_boolean ret = TRUE;
9698 bfd_boolean is_opd;
9699 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9700 bfd_boolean is_power4 = FALSE;
9701
9702 /* Initialize howto table if needed. */
9703 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9704 ppc_howto_init ();
9705
9706 htab = ppc_hash_table (info);
9707
9708 /* Don't relocate stub sections. */
9709 if (input_section->owner == htab->stub_bfd)
9710 return TRUE;
9711
9712 local_got_ents = elf_local_got_ents (input_bfd);
9713 TOCstart = elf_gp (output_bfd);
9714 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
9715 sym_hashes = elf_sym_hashes (input_bfd);
9716 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
9717
9718 rel = relocs;
9719 relend = relocs + input_section->reloc_count;
9720 for (; rel < relend; rel++)
9721 {
9722 enum elf_ppc64_reloc_type r_type;
9723 bfd_vma addend, orig_addend;
9724 bfd_reloc_status_type r;
9725 Elf_Internal_Sym *sym;
9726 asection *sec;
9727 struct elf_link_hash_entry *h_elf;
9728 struct ppc_link_hash_entry *h;
9729 struct ppc_link_hash_entry *fdh;
9730 const char *sym_name;
9731 unsigned long r_symndx, toc_symndx;
9732 char tls_mask, tls_gd, tls_type;
9733 char sym_type;
9734 bfd_vma relocation;
9735 bfd_boolean unresolved_reloc;
9736 bfd_boolean warned;
9737 unsigned long insn, mask;
9738 struct ppc_stub_hash_entry *stub_entry;
9739 bfd_vma max_br_offset;
9740 bfd_vma from;
9741
9742 r_type = ELF64_R_TYPE (rel->r_info);
9743 r_symndx = ELF64_R_SYM (rel->r_info);
9744
9745 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
9746 symbol of the previous ADDR64 reloc. The symbol gives us the
9747 proper TOC base to use. */
9748 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
9749 && rel != relocs
9750 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
9751 && is_opd)
9752 r_symndx = ELF64_R_SYM (rel[-1].r_info);
9753
9754 sym = NULL;
9755 sec = NULL;
9756 h_elf = NULL;
9757 sym_name = NULL;
9758 unresolved_reloc = FALSE;
9759 warned = FALSE;
9760 orig_addend = rel->r_addend;
9761
9762 if (r_symndx < symtab_hdr->sh_info)
9763 {
9764 /* It's a local symbol. */
9765 long *opd_adjust;
9766
9767 sym = local_syms + r_symndx;
9768 sec = local_sections[r_symndx];
9769 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
9770 sym_type = ELF64_ST_TYPE (sym->st_info);
9771 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
9772 opd_adjust = get_opd_info (sec);
9773 if (opd_adjust != NULL)
9774 {
9775 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
9776 if (adjust == -1)
9777 relocation = 0;
9778 else
9779 {
9780 /* If this is a relocation against the opd section sym
9781 and we have edited .opd, adjust the reloc addend so
9782 that ld -r and ld --emit-relocs output is correct.
9783 If it is a reloc against some other .opd symbol,
9784 then the symbol value will be adjusted later. */
9785 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
9786 rel->r_addend += adjust;
9787 else
9788 relocation += adjust;
9789 }
9790 }
9791 if (info->relocatable)
9792 continue;
9793 }
9794 else
9795 {
9796 if (info->relocatable)
9797 continue;
9798 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
9799 r_symndx, symtab_hdr, sym_hashes,
9800 h_elf, sec, relocation,
9801 unresolved_reloc, warned);
9802 sym_name = h_elf->root.root.string;
9803 sym_type = h_elf->type;
9804 }
9805 h = (struct ppc_link_hash_entry *) h_elf;
9806
9807 /* TLS optimizations. Replace instruction sequences and relocs
9808 based on information we collected in tls_optimize. We edit
9809 RELOCS so that --emit-relocs will output something sensible
9810 for the final instruction stream. */
9811 tls_mask = 0;
9812 tls_gd = 0;
9813 toc_symndx = 0;
9814 if (IS_PPC64_TLS_RELOC (r_type))
9815 {
9816 if (h != NULL)
9817 tls_mask = h->tls_mask;
9818 else if (local_got_ents != NULL)
9819 {
9820 char *lgot_masks;
9821 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
9822 tls_mask = lgot_masks[r_symndx];
9823 }
9824 if (tls_mask == 0 && r_type == R_PPC64_TLS)
9825 {
9826 /* Check for toc tls entries. */
9827 char *toc_tls;
9828
9829 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9830 rel, input_bfd))
9831 return FALSE;
9832
9833 if (toc_tls)
9834 tls_mask = *toc_tls;
9835 }
9836 }
9837
9838 /* Check that tls relocs are used with tls syms, and non-tls
9839 relocs are used with non-tls syms. */
9840 if (r_symndx != 0
9841 && r_type != R_PPC64_NONE
9842 && (h == NULL
9843 || h->elf.root.type == bfd_link_hash_defined
9844 || h->elf.root.type == bfd_link_hash_defweak)
9845 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
9846 {
9847 if (r_type == R_PPC64_TLS && tls_mask != 0)
9848 /* R_PPC64_TLS is OK against a symbol in the TOC. */
9849 ;
9850 else
9851 (*_bfd_error_handler)
9852 (sym_type == STT_TLS
9853 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
9854 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
9855 input_bfd,
9856 input_section,
9857 (long) rel->r_offset,
9858 ppc64_elf_howto_table[r_type]->name,
9859 sym_name);
9860 }
9861
9862 /* Ensure reloc mapping code below stays sane. */
9863 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
9864 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
9865 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
9866 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
9867 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
9868 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
9869 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
9870 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
9871 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
9872 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
9873 abort ();
9874
9875 switch (r_type)
9876 {
9877 default:
9878 break;
9879
9880 case R_PPC64_TOC16:
9881 case R_PPC64_TOC16_LO:
9882 case R_PPC64_TOC16_DS:
9883 case R_PPC64_TOC16_LO_DS:
9884 {
9885 /* Check for toc tls entries. */
9886 char *toc_tls;
9887 int retval;
9888
9889 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
9890 rel, input_bfd);
9891 if (retval == 0)
9892 return FALSE;
9893
9894 if (toc_tls)
9895 {
9896 tls_mask = *toc_tls;
9897 if (r_type == R_PPC64_TOC16_DS
9898 || r_type == R_PPC64_TOC16_LO_DS)
9899 {
9900 if (tls_mask != 0
9901 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
9902 goto toctprel;
9903 }
9904 else
9905 {
9906 /* If we found a GD reloc pair, then we might be
9907 doing a GD->IE transition. */
9908 if (retval == 2)
9909 {
9910 tls_gd = TLS_TPRELGD;
9911 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
9912 goto tls_get_addr_check;
9913 }
9914 else if (retval == 3)
9915 {
9916 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
9917 goto tls_get_addr_check;
9918 }
9919 }
9920 }
9921 }
9922 break;
9923
9924 case R_PPC64_GOT_TPREL16_DS:
9925 case R_PPC64_GOT_TPREL16_LO_DS:
9926 if (tls_mask != 0
9927 && (tls_mask & TLS_TPREL) == 0)
9928 {
9929 toctprel:
9930 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
9931 insn &= 31 << 21;
9932 insn |= 0x3c0d0000; /* addis 0,13,0 */
9933 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
9934 r_type = R_PPC64_TPREL16_HA;
9935 if (toc_symndx != 0)
9936 {
9937 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9938 /* We changed the symbol. Start over in order to
9939 get h, sym, sec etc. right. */
9940 rel--;
9941 continue;
9942 }
9943 else
9944 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9945 }
9946 break;
9947
9948 case R_PPC64_TLS:
9949 if (tls_mask != 0
9950 && (tls_mask & TLS_TPREL) == 0)
9951 {
9952 bfd_vma rtra;
9953 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9954 if ((insn & ((0x3f << 26) | (31 << 11)))
9955 == ((31 << 26) | (13 << 11)))
9956 rtra = insn & ((1 << 26) - (1 << 16));
9957 else if ((insn & ((0x3f << 26) | (31 << 16)))
9958 == ((31 << 26) | (13 << 16)))
9959 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
9960 else
9961 abort ();
9962 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
9963 /* add -> addi. */
9964 insn = 14 << 26;
9965 else if ((insn & (31 << 1)) == 23 << 1
9966 && ((insn & (31 << 6)) < 14 << 6
9967 || ((insn & (31 << 6)) >= 16 << 6
9968 && (insn & (31 << 6)) < 24 << 6)))
9969 /* load and store indexed -> dform. */
9970 insn = (32 | ((insn >> 6) & 31)) << 26;
9971 else if ((insn & (31 << 1)) == 21 << 1
9972 && (insn & (0x1a << 6)) == 0)
9973 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
9974 insn = (((58 | ((insn >> 6) & 4)) << 26)
9975 | ((insn >> 6) & 1));
9976 else if ((insn & (31 << 1)) == 21 << 1
9977 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
9978 /* lwax -> lwa. */
9979 insn = (58 << 26) | 2;
9980 else
9981 abort ();
9982 insn |= rtra;
9983 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9984 /* Was PPC64_TLS which sits on insn boundary, now
9985 PPC64_TPREL16_LO which is at insn+2. */
9986 rel->r_offset += 2;
9987 r_type = R_PPC64_TPREL16_LO;
9988 if (toc_symndx != 0)
9989 {
9990 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
9991 /* We changed the symbol. Start over in order to
9992 get h, sym, sec etc. right. */
9993 rel--;
9994 continue;
9995 }
9996 else
9997 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
9998 }
9999 break;
10000
10001 case R_PPC64_GOT_TLSGD16_HI:
10002 case R_PPC64_GOT_TLSGD16_HA:
10003 tls_gd = TLS_TPRELGD;
10004 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10005 goto tls_gdld_hi;
10006 break;
10007
10008 case R_PPC64_GOT_TLSLD16_HI:
10009 case R_PPC64_GOT_TLSLD16_HA:
10010 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10011 {
10012 tls_gdld_hi:
10013 if ((tls_mask & tls_gd) != 0)
10014 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10015 + R_PPC64_GOT_TPREL16_DS);
10016 else
10017 {
10018 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10019 rel->r_offset -= 2;
10020 r_type = R_PPC64_NONE;
10021 }
10022 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10023 }
10024 break;
10025
10026 case R_PPC64_GOT_TLSGD16:
10027 case R_PPC64_GOT_TLSGD16_LO:
10028 tls_gd = TLS_TPRELGD;
10029 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10030 goto tls_get_addr_check;
10031 break;
10032
10033 case R_PPC64_GOT_TLSLD16:
10034 case R_PPC64_GOT_TLSLD16_LO:
10035 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10036 {
10037 tls_get_addr_check:
10038 if (rel + 1 < relend)
10039 {
10040 enum elf_ppc64_reloc_type r_type2;
10041 unsigned long r_symndx2;
10042 struct elf_link_hash_entry *h2;
10043 bfd_vma insn1, insn2, insn3;
10044 bfd_vma offset;
10045
10046 /* The next instruction should be a call to
10047 __tls_get_addr. Peek at the reloc to be sure. */
10048 r_type2 = ELF64_R_TYPE (rel[1].r_info);
10049 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
10050 if (r_symndx2 < symtab_hdr->sh_info
10051 || (r_type2 != R_PPC64_REL14
10052 && r_type2 != R_PPC64_REL14_BRTAKEN
10053 && r_type2 != R_PPC64_REL14_BRNTAKEN
10054 && r_type2 != R_PPC64_REL24))
10055 break;
10056
10057 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
10058 while (h2->root.type == bfd_link_hash_indirect
10059 || h2->root.type == bfd_link_hash_warning)
10060 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
10061 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
10062 && h2 != &htab->tls_get_addr_fd->elf))
10063 break;
10064
10065 /* OK, it checks out. Replace the call. */
10066 offset = rel[1].r_offset;
10067 insn1 = bfd_get_32 (output_bfd,
10068 contents + rel->r_offset - 2);
10069 insn3 = bfd_get_32 (output_bfd,
10070 contents + offset + 4);
10071 if ((tls_mask & tls_gd) != 0)
10072 {
10073 /* IE */
10074 insn1 &= (1 << 26) - (1 << 2);
10075 insn1 |= 58 << 26; /* ld */
10076 insn2 = 0x7c636a14; /* add 3,3,13 */
10077 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
10078 if ((tls_mask & TLS_EXPLICIT) == 0)
10079 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10080 + R_PPC64_GOT_TPREL16_DS);
10081 else
10082 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10083 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10084 }
10085 else
10086 {
10087 /* LE */
10088 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10089 insn2 = 0x38630000; /* addi 3,3,0 */
10090 if (tls_gd == 0)
10091 {
10092 /* Was an LD reloc. */
10093 r_symndx = 0;
10094 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10095 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10096 }
10097 else if (toc_symndx != 0)
10098 r_symndx = toc_symndx;
10099 r_type = R_PPC64_TPREL16_HA;
10100 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10101 rel[1].r_info = ELF64_R_INFO (r_symndx,
10102 R_PPC64_TPREL16_LO);
10103 rel[1].r_offset += 2;
10104 }
10105 if (insn3 == NOP
10106 || insn3 == CROR_151515 || insn3 == CROR_313131)
10107 {
10108 insn3 = insn2;
10109 insn2 = NOP;
10110 rel[1].r_offset += 4;
10111 }
10112 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
10113 bfd_put_32 (output_bfd, insn2, contents + offset);
10114 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10115 if (tls_gd == 0 || toc_symndx != 0)
10116 {
10117 /* We changed the symbol. Start over in order
10118 to get h, sym, sec etc. right. */
10119 rel--;
10120 continue;
10121 }
10122 }
10123 }
10124 break;
10125
10126 case R_PPC64_DTPMOD64:
10127 if (rel + 1 < relend
10128 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10129 && rel[1].r_offset == rel->r_offset + 8)
10130 {
10131 if ((tls_mask & TLS_GD) == 0)
10132 {
10133 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10134 if ((tls_mask & TLS_TPRELGD) != 0)
10135 r_type = R_PPC64_TPREL64;
10136 else
10137 {
10138 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10139 r_type = R_PPC64_NONE;
10140 }
10141 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10142 }
10143 }
10144 else
10145 {
10146 if ((tls_mask & TLS_LD) == 0)
10147 {
10148 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10149 r_type = R_PPC64_NONE;
10150 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10151 }
10152 }
10153 break;
10154
10155 case R_PPC64_TPREL64:
10156 if ((tls_mask & TLS_TPREL) == 0)
10157 {
10158 r_type = R_PPC64_NONE;
10159 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10160 }
10161 break;
10162 }
10163
10164 /* Handle other relocations that tweak non-addend part of insn. */
10165 insn = 0;
10166 max_br_offset = 1 << 25;
10167 addend = rel->r_addend;
10168 switch (r_type)
10169 {
10170 default:
10171 break;
10172
10173 /* Branch taken prediction relocations. */
10174 case R_PPC64_ADDR14_BRTAKEN:
10175 case R_PPC64_REL14_BRTAKEN:
10176 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10177 /* Fall thru. */
10178
10179 /* Branch not taken prediction relocations. */
10180 case R_PPC64_ADDR14_BRNTAKEN:
10181 case R_PPC64_REL14_BRNTAKEN:
10182 insn |= bfd_get_32 (output_bfd,
10183 contents + rel->r_offset) & ~(0x01 << 21);
10184 /* Fall thru. */
10185
10186 case R_PPC64_REL14:
10187 max_br_offset = 1 << 15;
10188 /* Fall thru. */
10189
10190 case R_PPC64_REL24:
10191 /* Calls to functions with a different TOC, such as calls to
10192 shared objects, need to alter the TOC pointer. This is
10193 done using a linkage stub. A REL24 branching to these
10194 linkage stubs needs to be followed by a nop, as the nop
10195 will be replaced with an instruction to restore the TOC
10196 base pointer. */
10197 stub_entry = NULL;
10198 fdh = h;
10199 if (((h != NULL
10200 && (((fdh = h->oh) != NULL
10201 && fdh->elf.plt.plist != NULL)
10202 || (fdh = h)->elf.plt.plist != NULL))
10203 || (sec != NULL
10204 && sec->output_section != NULL
10205 && sec->id <= htab->top_id
10206 && (htab->stub_group[sec->id].toc_off
10207 != htab->stub_group[input_section->id].toc_off)))
10208 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10209 rel, htab)) != NULL
10210 && (stub_entry->stub_type == ppc_stub_plt_call
10211 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10212 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10213 {
10214 bfd_boolean can_plt_call = FALSE;
10215
10216 if (rel->r_offset + 8 <= input_section->size)
10217 {
10218 unsigned long nop;
10219 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10220 if (nop == NOP
10221 || nop == CROR_151515 || nop == CROR_313131)
10222 {
10223 bfd_put_32 (input_bfd, LD_R2_40R1,
10224 contents + rel->r_offset + 4);
10225 can_plt_call = TRUE;
10226 }
10227 }
10228
10229 if (!can_plt_call)
10230 {
10231 if (stub_entry->stub_type == ppc_stub_plt_call)
10232 {
10233 /* If this is a plain branch rather than a branch
10234 and link, don't require a nop. However, don't
10235 allow tail calls in a shared library as they
10236 will result in r2 being corrupted. */
10237 unsigned long br;
10238 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10239 if (info->executable && (br & 1) == 0)
10240 can_plt_call = TRUE;
10241 else
10242 stub_entry = NULL;
10243 }
10244 else if (h != NULL
10245 && strcmp (h->elf.root.root.string,
10246 ".__libc_start_main") == 0)
10247 {
10248 /* Allow crt1 branch to go via a toc adjusting stub. */
10249 can_plt_call = TRUE;
10250 }
10251 else
10252 {
10253 if (strcmp (input_section->output_section->name,
10254 ".init") == 0
10255 || strcmp (input_section->output_section->name,
10256 ".fini") == 0)
10257 (*_bfd_error_handler)
10258 (_("%B(%A+0x%lx): automatic multiple TOCs "
10259 "not supported using your crt files; "
10260 "recompile with -mminimal-toc or upgrade gcc"),
10261 input_bfd,
10262 input_section,
10263 (long) rel->r_offset);
10264 else
10265 (*_bfd_error_handler)
10266 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10267 "does not allow automatic multiple TOCs; "
10268 "recompile with -mminimal-toc or "
10269 "-fno-optimize-sibling-calls, "
10270 "or make `%s' extern"),
10271 input_bfd,
10272 input_section,
10273 (long) rel->r_offset,
10274 sym_name,
10275 sym_name);
10276 bfd_set_error (bfd_error_bad_value);
10277 ret = FALSE;
10278 }
10279 }
10280
10281 if (can_plt_call
10282 && stub_entry->stub_type == ppc_stub_plt_call)
10283 unresolved_reloc = FALSE;
10284 }
10285
10286 if (stub_entry == NULL
10287 && get_opd_info (sec) != NULL)
10288 {
10289 /* The branch destination is the value of the opd entry. */
10290 bfd_vma off = (relocation + addend
10291 - sec->output_section->vma
10292 - sec->output_offset);
10293 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10294 if (dest != (bfd_vma) -1)
10295 {
10296 relocation = dest;
10297 addend = 0;
10298 }
10299 }
10300
10301 /* If the branch is out of reach we ought to have a long
10302 branch stub. */
10303 from = (rel->r_offset
10304 + input_section->output_offset
10305 + input_section->output_section->vma);
10306
10307 if (stub_entry == NULL
10308 && (relocation + addend - from + max_br_offset
10309 >= 2 * max_br_offset)
10310 && r_type != R_PPC64_ADDR14_BRTAKEN
10311 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10312 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10313 htab);
10314
10315 if (stub_entry != NULL)
10316 {
10317 /* Munge up the value and addend so that we call the stub
10318 rather than the procedure directly. */
10319 relocation = (stub_entry->stub_offset
10320 + stub_entry->stub_sec->output_offset
10321 + stub_entry->stub_sec->output_section->vma);
10322 addend = 0;
10323 }
10324
10325 if (insn != 0)
10326 {
10327 if (is_power4)
10328 {
10329 /* Set 'a' bit. This is 0b00010 in BO field for branch
10330 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10331 for branch on CTR insns (BO == 1a00t or 1a01t). */
10332 if ((insn & (0x14 << 21)) == (0x04 << 21))
10333 insn |= 0x02 << 21;
10334 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10335 insn |= 0x08 << 21;
10336 else
10337 break;
10338 }
10339 else
10340 {
10341 /* Invert 'y' bit if not the default. */
10342 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10343 insn ^= 0x01 << 21;
10344 }
10345
10346 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10347 }
10348
10349 /* NOP out calls to undefined weak functions.
10350 We can thus call a weak function without first
10351 checking whether the function is defined. */
10352 else if (h != NULL
10353 && h->elf.root.type == bfd_link_hash_undefweak
10354 && r_type == R_PPC64_REL24
10355 && relocation == 0
10356 && addend == 0)
10357 {
10358 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10359 continue;
10360 }
10361 break;
10362 }
10363
10364 /* Set `addend'. */
10365 tls_type = 0;
10366 switch (r_type)
10367 {
10368 default:
10369 (*_bfd_error_handler)
10370 (_("%B: unknown relocation type %d for symbol %s"),
10371 input_bfd, (int) r_type, sym_name);
10372
10373 bfd_set_error (bfd_error_bad_value);
10374 ret = FALSE;
10375 continue;
10376
10377 case R_PPC64_NONE:
10378 case R_PPC64_TLS:
10379 case R_PPC64_GNU_VTINHERIT:
10380 case R_PPC64_GNU_VTENTRY:
10381 continue;
10382
10383 /* GOT16 relocations. Like an ADDR16 using the symbol's
10384 address in the GOT as relocation value instead of the
10385 symbol's value itself. Also, create a GOT entry for the
10386 symbol and put the symbol value there. */
10387 case R_PPC64_GOT_TLSGD16:
10388 case R_PPC64_GOT_TLSGD16_LO:
10389 case R_PPC64_GOT_TLSGD16_HI:
10390 case R_PPC64_GOT_TLSGD16_HA:
10391 tls_type = TLS_TLS | TLS_GD;
10392 goto dogot;
10393
10394 case R_PPC64_GOT_TLSLD16:
10395 case R_PPC64_GOT_TLSLD16_LO:
10396 case R_PPC64_GOT_TLSLD16_HI:
10397 case R_PPC64_GOT_TLSLD16_HA:
10398 tls_type = TLS_TLS | TLS_LD;
10399 goto dogot;
10400
10401 case R_PPC64_GOT_TPREL16_DS:
10402 case R_PPC64_GOT_TPREL16_LO_DS:
10403 case R_PPC64_GOT_TPREL16_HI:
10404 case R_PPC64_GOT_TPREL16_HA:
10405 tls_type = TLS_TLS | TLS_TPREL;
10406 goto dogot;
10407
10408 case R_PPC64_GOT_DTPREL16_DS:
10409 case R_PPC64_GOT_DTPREL16_LO_DS:
10410 case R_PPC64_GOT_DTPREL16_HI:
10411 case R_PPC64_GOT_DTPREL16_HA:
10412 tls_type = TLS_TLS | TLS_DTPREL;
10413 goto dogot;
10414
10415 case R_PPC64_GOT16:
10416 case R_PPC64_GOT16_LO:
10417 case R_PPC64_GOT16_HI:
10418 case R_PPC64_GOT16_HA:
10419 case R_PPC64_GOT16_DS:
10420 case R_PPC64_GOT16_LO_DS:
10421 dogot:
10422 {
10423 /* Relocation is to the entry for this symbol in the global
10424 offset table. */
10425 asection *got;
10426 bfd_vma *offp;
10427 bfd_vma off;
10428 unsigned long indx = 0;
10429
10430 if (tls_type == (TLS_TLS | TLS_LD)
10431 && (h == NULL
10432 || !h->elf.def_dynamic))
10433 offp = &ppc64_tlsld_got (input_bfd)->offset;
10434 else
10435 {
10436 struct got_entry *ent;
10437
10438 if (h != NULL)
10439 {
10440 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10441 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10442 &h->elf)
10443 || (info->shared
10444 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10445 /* This is actually a static link, or it is a
10446 -Bsymbolic link and the symbol is defined
10447 locally, or the symbol was forced to be local
10448 because of a version file. */
10449 ;
10450 else
10451 {
10452 indx = h->elf.dynindx;
10453 unresolved_reloc = FALSE;
10454 }
10455 ent = h->elf.got.glist;
10456 }
10457 else
10458 {
10459 if (local_got_ents == NULL)
10460 abort ();
10461 ent = local_got_ents[r_symndx];
10462 }
10463
10464 for (; ent != NULL; ent = ent->next)
10465 if (ent->addend == orig_addend
10466 && ent->owner == input_bfd
10467 && ent->tls_type == tls_type)
10468 break;
10469 if (ent == NULL)
10470 abort ();
10471 offp = &ent->got.offset;
10472 }
10473
10474 got = ppc64_elf_tdata (input_bfd)->got;
10475 if (got == NULL)
10476 abort ();
10477
10478 /* The offset must always be a multiple of 8. We use the
10479 least significant bit to record whether we have already
10480 processed this entry. */
10481 off = *offp;
10482 if ((off & 1) != 0)
10483 off &= ~1;
10484 else
10485 {
10486 /* Generate relocs for the dynamic linker, except in
10487 the case of TLSLD where we'll use one entry per
10488 module. */
10489 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10490
10491 *offp = off | 1;
10492 if ((info->shared || indx != 0)
10493 && (h == NULL
10494 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10495 || h->elf.root.type != bfd_link_hash_undefweak))
10496 {
10497 outrel.r_offset = (got->output_section->vma
10498 + got->output_offset
10499 + off);
10500 outrel.r_addend = addend;
10501 if (tls_type & (TLS_LD | TLS_GD))
10502 {
10503 outrel.r_addend = 0;
10504 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10505 if (tls_type == (TLS_TLS | TLS_GD))
10506 {
10507 loc = relgot->contents;
10508 loc += (relgot->reloc_count++
10509 * sizeof (Elf64_External_Rela));
10510 bfd_elf64_swap_reloca_out (output_bfd,
10511 &outrel, loc);
10512 outrel.r_offset += 8;
10513 outrel.r_addend = addend;
10514 outrel.r_info
10515 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10516 }
10517 }
10518 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10519 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10520 else if (tls_type == (TLS_TLS | TLS_TPREL))
10521 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10522 else if (indx == 0)
10523 {
10524 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10525
10526 /* Write the .got section contents for the sake
10527 of prelink. */
10528 loc = got->contents + off;
10529 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10530 loc);
10531 }
10532 else
10533 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10534
10535 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10536 {
10537 outrel.r_addend += relocation;
10538 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10539 outrel.r_addend -= htab->elf.tls_sec->vma;
10540 }
10541 loc = relgot->contents;
10542 loc += (relgot->reloc_count++
10543 * sizeof (Elf64_External_Rela));
10544 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10545 }
10546
10547 /* Init the .got section contents here if we're not
10548 emitting a reloc. */
10549 else
10550 {
10551 relocation += addend;
10552 if (tls_type == (TLS_TLS | TLS_LD))
10553 relocation = 1;
10554 else if (tls_type != 0)
10555 {
10556 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10557 if (tls_type == (TLS_TLS | TLS_TPREL))
10558 relocation += DTP_OFFSET - TP_OFFSET;
10559
10560 if (tls_type == (TLS_TLS | TLS_GD))
10561 {
10562 bfd_put_64 (output_bfd, relocation,
10563 got->contents + off + 8);
10564 relocation = 1;
10565 }
10566 }
10567
10568 bfd_put_64 (output_bfd, relocation,
10569 got->contents + off);
10570 }
10571 }
10572
10573 if (off >= (bfd_vma) -2)
10574 abort ();
10575
10576 relocation = got->output_offset + off;
10577
10578 /* TOC base (r2) is TOC start plus 0x8000. */
10579 addend = -TOC_BASE_OFF;
10580 }
10581 break;
10582
10583 case R_PPC64_PLT16_HA:
10584 case R_PPC64_PLT16_HI:
10585 case R_PPC64_PLT16_LO:
10586 case R_PPC64_PLT32:
10587 case R_PPC64_PLT64:
10588 /* Relocation is to the entry for this symbol in the
10589 procedure linkage table. */
10590
10591 /* Resolve a PLT reloc against a local symbol directly,
10592 without using the procedure linkage table. */
10593 if (h == NULL)
10594 break;
10595
10596 /* It's possible that we didn't make a PLT entry for this
10597 symbol. This happens when statically linking PIC code,
10598 or when using -Bsymbolic. Go find a match if there is a
10599 PLT entry. */
10600 if (htab->plt != NULL)
10601 {
10602 struct plt_entry *ent;
10603 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10604 if (ent->addend == orig_addend
10605 && ent->plt.offset != (bfd_vma) -1)
10606 {
10607 relocation = (htab->plt->output_section->vma
10608 + htab->plt->output_offset
10609 + ent->plt.offset);
10610 unresolved_reloc = FALSE;
10611 }
10612 }
10613 break;
10614
10615 case R_PPC64_TOC:
10616 /* Relocation value is TOC base. */
10617 relocation = TOCstart;
10618 if (r_symndx == 0)
10619 relocation += htab->stub_group[input_section->id].toc_off;
10620 else if (unresolved_reloc)
10621 ;
10622 else if (sec != NULL && sec->id <= htab->top_id)
10623 relocation += htab->stub_group[sec->id].toc_off;
10624 else
10625 unresolved_reloc = TRUE;
10626 goto dodyn2;
10627
10628 /* TOC16 relocs. We want the offset relative to the TOC base,
10629 which is the address of the start of the TOC plus 0x8000.
10630 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10631 in this order. */
10632 case R_PPC64_TOC16:
10633 case R_PPC64_TOC16_LO:
10634 case R_PPC64_TOC16_HI:
10635 case R_PPC64_TOC16_DS:
10636 case R_PPC64_TOC16_LO_DS:
10637 case R_PPC64_TOC16_HA:
10638 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10639 break;
10640
10641 /* Relocate against the beginning of the section. */
10642 case R_PPC64_SECTOFF:
10643 case R_PPC64_SECTOFF_LO:
10644 case R_PPC64_SECTOFF_HI:
10645 case R_PPC64_SECTOFF_DS:
10646 case R_PPC64_SECTOFF_LO_DS:
10647 case R_PPC64_SECTOFF_HA:
10648 if (sec != NULL)
10649 addend -= sec->output_section->vma;
10650 break;
10651
10652 case R_PPC64_REL14:
10653 case R_PPC64_REL14_BRNTAKEN:
10654 case R_PPC64_REL14_BRTAKEN:
10655 case R_PPC64_REL24:
10656 break;
10657
10658 case R_PPC64_TPREL16:
10659 case R_PPC64_TPREL16_LO:
10660 case R_PPC64_TPREL16_HI:
10661 case R_PPC64_TPREL16_HA:
10662 case R_PPC64_TPREL16_DS:
10663 case R_PPC64_TPREL16_LO_DS:
10664 case R_PPC64_TPREL16_HIGHER:
10665 case R_PPC64_TPREL16_HIGHERA:
10666 case R_PPC64_TPREL16_HIGHEST:
10667 case R_PPC64_TPREL16_HIGHESTA:
10668 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10669 if (info->shared)
10670 /* The TPREL16 relocs shouldn't really be used in shared
10671 libs as they will result in DT_TEXTREL being set, but
10672 support them anyway. */
10673 goto dodyn;
10674 break;
10675
10676 case R_PPC64_DTPREL16:
10677 case R_PPC64_DTPREL16_LO:
10678 case R_PPC64_DTPREL16_HI:
10679 case R_PPC64_DTPREL16_HA:
10680 case R_PPC64_DTPREL16_DS:
10681 case R_PPC64_DTPREL16_LO_DS:
10682 case R_PPC64_DTPREL16_HIGHER:
10683 case R_PPC64_DTPREL16_HIGHERA:
10684 case R_PPC64_DTPREL16_HIGHEST:
10685 case R_PPC64_DTPREL16_HIGHESTA:
10686 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10687 break;
10688
10689 case R_PPC64_DTPMOD64:
10690 relocation = 1;
10691 addend = 0;
10692 goto dodyn;
10693
10694 case R_PPC64_TPREL64:
10695 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10696 goto dodyn;
10697
10698 case R_PPC64_DTPREL64:
10699 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10700 /* Fall thru */
10701
10702 /* Relocations that may need to be propagated if this is a
10703 dynamic object. */
10704 case R_PPC64_REL30:
10705 case R_PPC64_REL32:
10706 case R_PPC64_REL64:
10707 case R_PPC64_ADDR14:
10708 case R_PPC64_ADDR14_BRNTAKEN:
10709 case R_PPC64_ADDR14_BRTAKEN:
10710 case R_PPC64_ADDR16:
10711 case R_PPC64_ADDR16_DS:
10712 case R_PPC64_ADDR16_HA:
10713 case R_PPC64_ADDR16_HI:
10714 case R_PPC64_ADDR16_HIGHER:
10715 case R_PPC64_ADDR16_HIGHERA:
10716 case R_PPC64_ADDR16_HIGHEST:
10717 case R_PPC64_ADDR16_HIGHESTA:
10718 case R_PPC64_ADDR16_LO:
10719 case R_PPC64_ADDR16_LO_DS:
10720 case R_PPC64_ADDR24:
10721 case R_PPC64_ADDR32:
10722 case R_PPC64_ADDR64:
10723 case R_PPC64_UADDR16:
10724 case R_PPC64_UADDR32:
10725 case R_PPC64_UADDR64:
10726 /* r_symndx will be zero only for relocs against symbols
10727 from removed linkonce sections, or sections discarded by
10728 a linker script. */
10729 dodyn:
10730 if (r_symndx == 0)
10731 break;
10732 /* Fall thru. */
10733
10734 dodyn2:
10735 if ((input_section->flags & SEC_ALLOC) == 0)
10736 break;
10737
10738 if (NO_OPD_RELOCS && is_opd)
10739 break;
10740
10741 if ((info->shared
10742 && (h == NULL
10743 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10744 || h->elf.root.type != bfd_link_hash_undefweak)
10745 && (MUST_BE_DYN_RELOC (r_type)
10746 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10747 || (ELIMINATE_COPY_RELOCS
10748 && !info->shared
10749 && h != NULL
10750 && h->elf.dynindx != -1
10751 && !h->elf.non_got_ref
10752 && h->elf.def_dynamic
10753 && !h->elf.def_regular))
10754 {
10755 Elf_Internal_Rela outrel;
10756 bfd_boolean skip, relocate;
10757 asection *sreloc;
10758 bfd_byte *loc;
10759 bfd_vma out_off;
10760
10761 /* When generating a dynamic object, these relocations
10762 are copied into the output file to be resolved at run
10763 time. */
10764
10765 skip = FALSE;
10766 relocate = FALSE;
10767
10768 out_off = _bfd_elf_section_offset (output_bfd, info,
10769 input_section, rel->r_offset);
10770 if (out_off == (bfd_vma) -1)
10771 skip = TRUE;
10772 else if (out_off == (bfd_vma) -2)
10773 skip = TRUE, relocate = TRUE;
10774 out_off += (input_section->output_section->vma
10775 + input_section->output_offset);
10776 outrel.r_offset = out_off;
10777 outrel.r_addend = rel->r_addend;
10778
10779 /* Optimize unaligned reloc use. */
10780 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
10781 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
10782 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
10783 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
10784 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
10785 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
10786 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
10787 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
10788 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
10789
10790 if (skip)
10791 memset (&outrel, 0, sizeof outrel);
10792 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
10793 && !is_opd
10794 && r_type != R_PPC64_TOC)
10795 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
10796 else
10797 {
10798 /* This symbol is local, or marked to become local,
10799 or this is an opd section reloc which must point
10800 at a local function. */
10801 outrel.r_addend += relocation;
10802 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
10803 {
10804 if (is_opd && h != NULL)
10805 {
10806 /* Lie about opd entries. This case occurs
10807 when building shared libraries and we
10808 reference a function in another shared
10809 lib. The same thing happens for a weak
10810 definition in an application that's
10811 overridden by a strong definition in a
10812 shared lib. (I believe this is a generic
10813 bug in binutils handling of weak syms.)
10814 In these cases we won't use the opd
10815 entry in this lib. */
10816 unresolved_reloc = FALSE;
10817 }
10818 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10819
10820 /* We need to relocate .opd contents for ld.so.
10821 Prelink also wants simple and consistent rules
10822 for relocs. This make all RELATIVE relocs have
10823 *r_offset equal to r_addend. */
10824 relocate = TRUE;
10825 }
10826 else
10827 {
10828 long indx = 0;
10829
10830 if (bfd_is_abs_section (sec))
10831 ;
10832 else if (sec == NULL || sec->owner == NULL)
10833 {
10834 bfd_set_error (bfd_error_bad_value);
10835 return FALSE;
10836 }
10837 else
10838 {
10839 asection *osec;
10840
10841 osec = sec->output_section;
10842 indx = elf_section_data (osec)->dynindx;
10843
10844 /* We are turning this relocation into one
10845 against a section symbol, so subtract out
10846 the output section's address but not the
10847 offset of the input section in the output
10848 section. */
10849 outrel.r_addend -= osec->vma;
10850 }
10851
10852 outrel.r_info = ELF64_R_INFO (indx, r_type);
10853 }
10854 }
10855
10856 sreloc = elf_section_data (input_section)->sreloc;
10857 if (sreloc == NULL)
10858 abort ();
10859
10860 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
10861 >= sreloc->size)
10862 abort ();
10863 loc = sreloc->contents;
10864 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
10865 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10866
10867 /* If this reloc is against an external symbol, it will
10868 be computed at runtime, so there's no need to do
10869 anything now. However, for the sake of prelink ensure
10870 that the section contents are a known value. */
10871 if (! relocate)
10872 {
10873 unresolved_reloc = FALSE;
10874 /* The value chosen here is quite arbitrary as ld.so
10875 ignores section contents except for the special
10876 case of .opd where the contents might be accessed
10877 before relocation. Choose zero, as that won't
10878 cause reloc overflow. */
10879 relocation = 0;
10880 addend = 0;
10881 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
10882 to improve backward compatibility with older
10883 versions of ld. */
10884 if (r_type == R_PPC64_ADDR64)
10885 addend = outrel.r_addend;
10886 /* Adjust pc_relative relocs to have zero in *r_offset. */
10887 else if (ppc64_elf_howto_table[r_type]->pc_relative)
10888 addend = (input_section->output_section->vma
10889 + input_section->output_offset
10890 + rel->r_offset);
10891 }
10892 }
10893 break;
10894
10895 case R_PPC64_COPY:
10896 case R_PPC64_GLOB_DAT:
10897 case R_PPC64_JMP_SLOT:
10898 case R_PPC64_RELATIVE:
10899 /* We shouldn't ever see these dynamic relocs in relocatable
10900 files. */
10901 /* Fall through. */
10902
10903 case R_PPC64_PLTGOT16:
10904 case R_PPC64_PLTGOT16_DS:
10905 case R_PPC64_PLTGOT16_HA:
10906 case R_PPC64_PLTGOT16_HI:
10907 case R_PPC64_PLTGOT16_LO:
10908 case R_PPC64_PLTGOT16_LO_DS:
10909 case R_PPC64_PLTREL32:
10910 case R_PPC64_PLTREL64:
10911 /* These ones haven't been implemented yet. */
10912
10913 (*_bfd_error_handler)
10914 (_("%B: relocation %s is not supported for symbol %s."),
10915 input_bfd,
10916 ppc64_elf_howto_table[r_type]->name, sym_name);
10917
10918 bfd_set_error (bfd_error_invalid_operation);
10919 ret = FALSE;
10920 continue;
10921 }
10922
10923 /* Do any further special processing. */
10924 switch (r_type)
10925 {
10926 default:
10927 break;
10928
10929 case R_PPC64_ADDR16_HA:
10930 case R_PPC64_ADDR16_HIGHERA:
10931 case R_PPC64_ADDR16_HIGHESTA:
10932 case R_PPC64_GOT16_HA:
10933 case R_PPC64_PLTGOT16_HA:
10934 case R_PPC64_PLT16_HA:
10935 case R_PPC64_TOC16_HA:
10936 case R_PPC64_SECTOFF_HA:
10937 case R_PPC64_TPREL16_HA:
10938 case R_PPC64_DTPREL16_HA:
10939 case R_PPC64_GOT_TLSGD16_HA:
10940 case R_PPC64_GOT_TLSLD16_HA:
10941 case R_PPC64_GOT_TPREL16_HA:
10942 case R_PPC64_GOT_DTPREL16_HA:
10943 case R_PPC64_TPREL16_HIGHER:
10944 case R_PPC64_TPREL16_HIGHERA:
10945 case R_PPC64_TPREL16_HIGHEST:
10946 case R_PPC64_TPREL16_HIGHESTA:
10947 case R_PPC64_DTPREL16_HIGHER:
10948 case R_PPC64_DTPREL16_HIGHERA:
10949 case R_PPC64_DTPREL16_HIGHEST:
10950 case R_PPC64_DTPREL16_HIGHESTA:
10951 /* It's just possible that this symbol is a weak symbol
10952 that's not actually defined anywhere. In that case,
10953 'sec' would be NULL, and we should leave the symbol
10954 alone (it will be set to zero elsewhere in the link). */
10955 if (sec != NULL)
10956 /* Add 0x10000 if sign bit in 0:15 is set.
10957 Bits 0:15 are not used. */
10958 addend += 0x8000;
10959 break;
10960
10961 case R_PPC64_ADDR16_DS:
10962 case R_PPC64_ADDR16_LO_DS:
10963 case R_PPC64_GOT16_DS:
10964 case R_PPC64_GOT16_LO_DS:
10965 case R_PPC64_PLT16_LO_DS:
10966 case R_PPC64_SECTOFF_DS:
10967 case R_PPC64_SECTOFF_LO_DS:
10968 case R_PPC64_TOC16_DS:
10969 case R_PPC64_TOC16_LO_DS:
10970 case R_PPC64_PLTGOT16_DS:
10971 case R_PPC64_PLTGOT16_LO_DS:
10972 case R_PPC64_GOT_TPREL16_DS:
10973 case R_PPC64_GOT_TPREL16_LO_DS:
10974 case R_PPC64_GOT_DTPREL16_DS:
10975 case R_PPC64_GOT_DTPREL16_LO_DS:
10976 case R_PPC64_TPREL16_DS:
10977 case R_PPC64_TPREL16_LO_DS:
10978 case R_PPC64_DTPREL16_DS:
10979 case R_PPC64_DTPREL16_LO_DS:
10980 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10981 mask = 3;
10982 /* If this reloc is against an lq insn, then the value must be
10983 a multiple of 16. This is somewhat of a hack, but the
10984 "correct" way to do this by defining _DQ forms of all the
10985 _DS relocs bloats all reloc switches in this file. It
10986 doesn't seem to make much sense to use any of these relocs
10987 in data, so testing the insn should be safe. */
10988 if ((insn & (0x3f << 26)) == (56u << 26))
10989 mask = 15;
10990 if (((relocation + addend) & mask) != 0)
10991 {
10992 (*_bfd_error_handler)
10993 (_("%B: error: relocation %s not a multiple of %d"),
10994 input_bfd,
10995 ppc64_elf_howto_table[r_type]->name,
10996 mask + 1);
10997 bfd_set_error (bfd_error_bad_value);
10998 ret = FALSE;
10999 continue;
11000 }
11001 break;
11002 }
11003
11004 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11005 because such sections are not SEC_ALLOC and thus ld.so will
11006 not process them. */
11007 if (unresolved_reloc
11008 && !((input_section->flags & SEC_DEBUGGING) != 0
11009 && h->elf.def_dynamic))
11010 {
11011 (*_bfd_error_handler)
11012 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11013 input_bfd,
11014 input_section,
11015 (long) rel->r_offset,
11016 ppc64_elf_howto_table[(int) r_type]->name,
11017 h->elf.root.root.string);
11018 ret = FALSE;
11019 }
11020
11021 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11022 input_bfd,
11023 input_section,
11024 contents,
11025 rel->r_offset,
11026 relocation,
11027 addend);
11028
11029 if (r != bfd_reloc_ok)
11030 {
11031 if (sym_name == NULL)
11032 sym_name = "(null)";
11033 if (r == bfd_reloc_overflow)
11034 {
11035 if (warned)
11036 continue;
11037 if (h != NULL
11038 && h->elf.root.type == bfd_link_hash_undefweak
11039 && ppc64_elf_howto_table[r_type]->pc_relative)
11040 {
11041 /* Assume this is a call protected by other code that
11042 detects the symbol is undefined. If this is the case,
11043 we can safely ignore the overflow. If not, the
11044 program is hosed anyway, and a little warning isn't
11045 going to help. */
11046
11047 continue;
11048 }
11049
11050 if (!((*info->callbacks->reloc_overflow)
11051 (info, (h ? &h->elf.root : NULL), sym_name,
11052 ppc64_elf_howto_table[r_type]->name,
11053 orig_addend, input_bfd, input_section, rel->r_offset)))
11054 return FALSE;
11055 }
11056 else
11057 {
11058 (*_bfd_error_handler)
11059 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11060 input_bfd,
11061 input_section,
11062 (long) rel->r_offset,
11063 ppc64_elf_howto_table[r_type]->name,
11064 sym_name,
11065 (int) r);
11066 ret = FALSE;
11067 }
11068 }
11069 }
11070
11071 /* If we're emitting relocations, then shortly after this function
11072 returns, reloc offsets and addends for this section will be
11073 adjusted. Worse, reloc symbol indices will be for the output
11074 file rather than the input. Save a copy of the relocs for
11075 opd_entry_value. */
11076 if (is_opd && (info->emitrelocations || info->relocatable))
11077 {
11078 bfd_size_type amt;
11079 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11080 rel = bfd_alloc (input_bfd, amt);
11081 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11082 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11083 if (rel == NULL)
11084 return FALSE;
11085 memcpy (rel, relocs, amt);
11086 }
11087 return ret;
11088 }
11089
11090 /* Adjust the value of any local symbols in opd sections. */
11091
11092 static bfd_boolean
11093 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11094 const char *name ATTRIBUTE_UNUSED,
11095 Elf_Internal_Sym *elfsym,
11096 asection *input_sec,
11097 struct elf_link_hash_entry *h)
11098 {
11099 long *opd_adjust, adjust;
11100 bfd_vma value;
11101
11102 if (h != NULL)
11103 return TRUE;
11104
11105 opd_adjust = get_opd_info (input_sec);
11106 if (opd_adjust == NULL)
11107 return TRUE;
11108
11109 value = elfsym->st_value - input_sec->output_offset;
11110 if (!info->relocatable)
11111 value -= input_sec->output_section->vma;
11112
11113 adjust = opd_adjust[value / 8];
11114 if (adjust == -1)
11115 elfsym->st_value = 0;
11116 else
11117 elfsym->st_value += adjust;
11118 return TRUE;
11119 }
11120
11121 /* Finish up dynamic symbol handling. We set the contents of various
11122 dynamic sections here. */
11123
11124 static bfd_boolean
11125 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11126 struct bfd_link_info *info,
11127 struct elf_link_hash_entry *h,
11128 Elf_Internal_Sym *sym)
11129 {
11130 struct ppc_link_hash_table *htab;
11131 struct plt_entry *ent;
11132 Elf_Internal_Rela rela;
11133 bfd_byte *loc;
11134
11135 htab = ppc_hash_table (info);
11136
11137 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11138 if (ent->plt.offset != (bfd_vma) -1)
11139 {
11140 /* This symbol has an entry in the procedure linkage
11141 table. Set it up. */
11142
11143 if (htab->plt == NULL
11144 || htab->relplt == NULL
11145 || htab->glink == NULL)
11146 abort ();
11147
11148 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11149 fill in the PLT entry. */
11150 rela.r_offset = (htab->plt->output_section->vma
11151 + htab->plt->output_offset
11152 + ent->plt.offset);
11153 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11154 rela.r_addend = ent->addend;
11155
11156 loc = htab->relplt->contents;
11157 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11158 * sizeof (Elf64_External_Rela));
11159 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11160 }
11161
11162 if (h->needs_copy)
11163 {
11164 Elf_Internal_Rela rela;
11165 bfd_byte *loc;
11166
11167 /* This symbol needs a copy reloc. Set it up. */
11168
11169 if (h->dynindx == -1
11170 || (h->root.type != bfd_link_hash_defined
11171 && h->root.type != bfd_link_hash_defweak)
11172 || htab->relbss == NULL)
11173 abort ();
11174
11175 rela.r_offset = (h->root.u.def.value
11176 + h->root.u.def.section->output_section->vma
11177 + h->root.u.def.section->output_offset);
11178 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11179 rela.r_addend = 0;
11180 loc = htab->relbss->contents;
11181 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11182 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11183 }
11184
11185 /* Mark some specially defined symbols as absolute. */
11186 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11187 sym->st_shndx = SHN_ABS;
11188
11189 return TRUE;
11190 }
11191
11192 /* Used to decide how to sort relocs in an optimal manner for the
11193 dynamic linker, before writing them out. */
11194
11195 static enum elf_reloc_type_class
11196 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11197 {
11198 enum elf_ppc64_reloc_type r_type;
11199
11200 r_type = ELF64_R_TYPE (rela->r_info);
11201 switch (r_type)
11202 {
11203 case R_PPC64_RELATIVE:
11204 return reloc_class_relative;
11205 case R_PPC64_JMP_SLOT:
11206 return reloc_class_plt;
11207 case R_PPC64_COPY:
11208 return reloc_class_copy;
11209 default:
11210 return reloc_class_normal;
11211 }
11212 }
11213
11214 /* Finish up the dynamic sections. */
11215
11216 static bfd_boolean
11217 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11218 struct bfd_link_info *info)
11219 {
11220 struct ppc_link_hash_table *htab;
11221 bfd *dynobj;
11222 asection *sdyn;
11223
11224 htab = ppc_hash_table (info);
11225 dynobj = htab->elf.dynobj;
11226 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11227
11228 if (htab->elf.dynamic_sections_created)
11229 {
11230 Elf64_External_Dyn *dyncon, *dynconend;
11231
11232 if (sdyn == NULL || htab->got == NULL)
11233 abort ();
11234
11235 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11236 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11237 for (; dyncon < dynconend; dyncon++)
11238 {
11239 Elf_Internal_Dyn dyn;
11240 asection *s;
11241
11242 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11243
11244 switch (dyn.d_tag)
11245 {
11246 default:
11247 continue;
11248
11249 case DT_PPC64_GLINK:
11250 s = htab->glink;
11251 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11252 /* We stupidly defined DT_PPC64_GLINK to be the start
11253 of glink rather than the first entry point, which is
11254 what ld.so needs, and now have a bigger stub to
11255 support automatic multiple TOCs. */
11256 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11257 break;
11258
11259 case DT_PPC64_OPD:
11260 s = bfd_get_section_by_name (output_bfd, ".opd");
11261 if (s == NULL)
11262 continue;
11263 dyn.d_un.d_ptr = s->vma;
11264 break;
11265
11266 case DT_PPC64_OPDSZ:
11267 s = bfd_get_section_by_name (output_bfd, ".opd");
11268 if (s == NULL)
11269 continue;
11270 dyn.d_un.d_val = s->size;
11271 break;
11272
11273 case DT_PLTGOT:
11274 s = htab->plt;
11275 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11276 break;
11277
11278 case DT_JMPREL:
11279 s = htab->relplt;
11280 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11281 break;
11282
11283 case DT_PLTRELSZ:
11284 dyn.d_un.d_val = htab->relplt->size;
11285 break;
11286
11287 case DT_RELASZ:
11288 /* Don't count procedure linkage table relocs in the
11289 overall reloc count. */
11290 s = htab->relplt;
11291 if (s == NULL)
11292 continue;
11293 dyn.d_un.d_val -= s->size;
11294 break;
11295
11296 case DT_RELA:
11297 /* We may not be using the standard ELF linker script.
11298 If .rela.plt is the first .rela section, we adjust
11299 DT_RELA to not include it. */
11300 s = htab->relplt;
11301 if (s == NULL)
11302 continue;
11303 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11304 continue;
11305 dyn.d_un.d_ptr += s->size;
11306 break;
11307 }
11308
11309 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11310 }
11311 }
11312
11313 if (htab->got != NULL && htab->got->size != 0)
11314 {
11315 /* Fill in the first entry in the global offset table.
11316 We use it to hold the link-time TOCbase. */
11317 bfd_put_64 (output_bfd,
11318 elf_gp (output_bfd) + TOC_BASE_OFF,
11319 htab->got->contents);
11320
11321 /* Set .got entry size. */
11322 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11323 }
11324
11325 if (htab->plt != NULL && htab->plt->size != 0)
11326 {
11327 /* Set .plt entry size. */
11328 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11329 = PLT_ENTRY_SIZE;
11330 }
11331
11332 /* We need to handle writing out multiple GOT sections ourselves,
11333 since we didn't add them to DYNOBJ. We know dynobj is the first
11334 bfd. */
11335 while ((dynobj = dynobj->link_next) != NULL)
11336 {
11337 asection *s;
11338
11339 if (!is_ppc64_elf_target (dynobj->xvec))
11340 continue;
11341
11342 s = ppc64_elf_tdata (dynobj)->got;
11343 if (s != NULL
11344 && s->size != 0
11345 && s->output_section != bfd_abs_section_ptr
11346 && !bfd_set_section_contents (output_bfd, s->output_section,
11347 s->contents, s->output_offset,
11348 s->size))
11349 return FALSE;
11350 s = ppc64_elf_tdata (dynobj)->relgot;
11351 if (s != NULL
11352 && s->size != 0
11353 && s->output_section != bfd_abs_section_ptr
11354 && !bfd_set_section_contents (output_bfd, s->output_section,
11355 s->contents, s->output_offset,
11356 s->size))
11357 return FALSE;
11358 }
11359
11360 return TRUE;
11361 }
11362
11363 #include "elf64-target.h"
GDB Binutils - Deliverables
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