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* elf64-ppc.c (ppc64_elf_edit_opd): Support 16 byte long .opd
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004
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 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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_symbol_offset 0
71 #define elf_backend_got_header_size 8
72 #define elf_backend_can_gc_sections 1
73 #define elf_backend_can_refcount 1
74 #define elf_backend_rela_normal 1
75
76 #define bfd_elf64_mkobject ppc64_elf_mkobject
77 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
78 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
79 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
80 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
81 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
82 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
83
84 #define elf_backend_object_p ppc64_elf_object_p
85 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
86 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
87 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
88 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
89 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
90 #define elf_backend_check_directives ppc64_elf_check_directives
91 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
92 #define elf_backend_check_relocs ppc64_elf_check_relocs
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_relocate_section ppc64_elf_relocate_section
100 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
101 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
102 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
103 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
104 #define elf_backend_special_sections ppc64_elf_special_sections
105
106 /* The name of the dynamic interpreter. This is put in the .interp
107 section. */
108 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
109
110 /* The size in bytes of an entry in the procedure linkage table. */
111 #define PLT_ENTRY_SIZE 24
112
113 /* The initial size of the plt reserved for the dynamic linker. */
114 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
115
116 /* TOC base pointers offset from start of TOC. */
117 #define TOC_BASE_OFF 0x8000
118
119 /* Offset of tp and dtp pointers from start of TLS block. */
120 #define TP_OFFSET 0x7000
121 #define DTP_OFFSET 0x8000
122
123 /* .plt call stub instructions. The normal stub is like this, but
124 sometimes the .plt entry crosses a 64k boundary and we need to
125 insert an addis to adjust r12. */
126 #define PLT_CALL_STUB_SIZE (7*4)
127 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
128 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
129 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
130 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
131 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
132 /* ld %r11,xxx+16@l(%r12) */
133 #define BCTR 0x4e800420 /* bctr */
134
135
136 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
137 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
138
139 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
140
141 /* glink call stub instructions. We enter with the index in R0, and the
142 address of glink entry in CTR. From that, we can calculate PLT0. */
143 #define GLINK_CALL_STUB_SIZE (16*4)
144 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
145 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
146 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
147 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
148 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
149 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
150 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
151 /* sub %r12,%r12,%r11 */
152 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
153 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
154 /* ld %r11,xxx@l(%r12) */
155 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
156 /* ld %r2,8(%r12) */
157 /* mtctr %r11 */
158 /* ld %r11,16(%r12) */
159 /* bctr */
160
161 /* Pad with this. */
162 #define NOP 0x60000000
163
164 /* Some other nops. */
165 #define CROR_151515 0x4def7b82
166 #define CROR_313131 0x4ffffb82
167
168 /* .glink entries for the first 32k functions are two instructions. */
169 #define LI_R0_0 0x38000000 /* li %r0,0 */
170 #define B_DOT 0x48000000 /* b . */
171
172 /* After that, we need two instructions to load the index, followed by
173 a branch. */
174 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
175 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
176
177 /* Instructions to save and restore floating point regs. */
178 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
179 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
180 #define BLR 0x4e800020 /* blr */
181
182 /* Since .opd is an array of descriptors and each entry will end up
183 with identical R_PPC64_RELATIVE relocs, there is really no need to
184 propagate .opd relocs; The dynamic linker should be taught to
185 relocate .opd without reloc entries. */
186 #ifndef NO_OPD_RELOCS
187 #define NO_OPD_RELOCS 0
188 #endif
189 \f
190 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
191
192 /* Relocation HOWTO's. */
193 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
194
195 static reloc_howto_type ppc64_elf_howto_raw[] = {
196 /* This reloc does nothing. */
197 HOWTO (R_PPC64_NONE, /* type */
198 0, /* rightshift */
199 2, /* size (0 = byte, 1 = short, 2 = long) */
200 32, /* bitsize */
201 FALSE, /* pc_relative */
202 0, /* bitpos */
203 complain_overflow_dont, /* complain_on_overflow */
204 bfd_elf_generic_reloc, /* special_function */
205 "R_PPC64_NONE", /* name */
206 FALSE, /* partial_inplace */
207 0, /* src_mask */
208 0, /* dst_mask */
209 FALSE), /* pcrel_offset */
210
211 /* A standard 32 bit relocation. */
212 HOWTO (R_PPC64_ADDR32, /* type */
213 0, /* rightshift */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
215 32, /* bitsize */
216 FALSE, /* pc_relative */
217 0, /* bitpos */
218 complain_overflow_bitfield, /* complain_on_overflow */
219 bfd_elf_generic_reloc, /* special_function */
220 "R_PPC64_ADDR32", /* name */
221 FALSE, /* partial_inplace */
222 0, /* src_mask */
223 0xffffffff, /* dst_mask */
224 FALSE), /* pcrel_offset */
225
226 /* An absolute 26 bit branch; the lower two bits must be zero.
227 FIXME: we don't check that, we just clear them. */
228 HOWTO (R_PPC64_ADDR24, /* type */
229 0, /* rightshift */
230 2, /* size (0 = byte, 1 = short, 2 = long) */
231 26, /* bitsize */
232 FALSE, /* pc_relative */
233 0, /* bitpos */
234 complain_overflow_bitfield, /* complain_on_overflow */
235 bfd_elf_generic_reloc, /* special_function */
236 "R_PPC64_ADDR24", /* name */
237 FALSE, /* partial_inplace */
238 0, /* src_mask */
239 0x03fffffc, /* dst_mask */
240 FALSE), /* pcrel_offset */
241
242 /* A standard 16 bit relocation. */
243 HOWTO (R_PPC64_ADDR16, /* type */
244 0, /* rightshift */
245 1, /* size (0 = byte, 1 = short, 2 = long) */
246 16, /* bitsize */
247 FALSE, /* pc_relative */
248 0, /* bitpos */
249 complain_overflow_bitfield, /* complain_on_overflow */
250 bfd_elf_generic_reloc, /* special_function */
251 "R_PPC64_ADDR16", /* name */
252 FALSE, /* partial_inplace */
253 0, /* src_mask */
254 0xffff, /* dst_mask */
255 FALSE), /* pcrel_offset */
256
257 /* A 16 bit relocation without overflow. */
258 HOWTO (R_PPC64_ADDR16_LO, /* type */
259 0, /* rightshift */
260 1, /* size (0 = byte, 1 = short, 2 = long) */
261 16, /* bitsize */
262 FALSE, /* pc_relative */
263 0, /* bitpos */
264 complain_overflow_dont,/* complain_on_overflow */
265 bfd_elf_generic_reloc, /* special_function */
266 "R_PPC64_ADDR16_LO", /* name */
267 FALSE, /* partial_inplace */
268 0, /* src_mask */
269 0xffff, /* dst_mask */
270 FALSE), /* pcrel_offset */
271
272 /* Bits 16-31 of an address. */
273 HOWTO (R_PPC64_ADDR16_HI, /* type */
274 16, /* rightshift */
275 1, /* size (0 = byte, 1 = short, 2 = long) */
276 16, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_dont, /* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC64_ADDR16_HI", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0xffff, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
288 bits, treated as a signed number, is negative. */
289 HOWTO (R_PPC64_ADDR16_HA, /* type */
290 16, /* rightshift */
291 1, /* size (0 = byte, 1 = short, 2 = long) */
292 16, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_dont, /* complain_on_overflow */
296 ppc64_elf_ha_reloc, /* special_function */
297 "R_PPC64_ADDR16_HA", /* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xffff, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 16 bit branch; the lower two bits must be zero.
304 FIXME: we don't check that, we just clear them. */
305 HOWTO (R_PPC64_ADDR14, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 ppc64_elf_branch_reloc, /* special_function */
313 "R_PPC64_ADDR14", /* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0x0000fffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* An absolute 16 bit branch, for which bit 10 should be set to
320 indicate that the branch is expected to be taken. The lower two
321 bits must be zero. */
322 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 ppc64_elf_brtaken_reloc, /* special_function */
330 "R_PPC64_ADDR14_BRTAKEN",/* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0x0000fffc, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* An absolute 16 bit branch, for which bit 10 should be set to
337 indicate that the branch is not expected to be taken. The lower
338 two bits must be zero. */
339 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
340 0, /* rightshift */
341 2, /* size (0 = byte, 1 = short, 2 = long) */
342 16, /* bitsize */
343 FALSE, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_bitfield, /* complain_on_overflow */
346 ppc64_elf_brtaken_reloc, /* special_function */
347 "R_PPC64_ADDR14_BRNTAKEN",/* name */
348 FALSE, /* partial_inplace */
349 0, /* src_mask */
350 0x0000fffc, /* dst_mask */
351 FALSE), /* pcrel_offset */
352
353 /* A relative 26 bit branch; the lower two bits must be zero. */
354 HOWTO (R_PPC64_REL24, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 26, /* bitsize */
358 TRUE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 ppc64_elf_branch_reloc, /* special_function */
362 "R_PPC64_REL24", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0x03fffffc, /* dst_mask */
366 TRUE), /* pcrel_offset */
367
368 /* A relative 16 bit branch; the lower two bits must be zero. */
369 HOWTO (R_PPC64_REL14, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 ppc64_elf_branch_reloc, /* special_function */
377 "R_PPC64_REL14", /* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0x0000fffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* A relative 16 bit branch. Bit 10 should be set to indicate that
384 the branch is expected to be taken. The lower two bits must be
385 zero. */
386 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
387 0, /* rightshift */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
389 16, /* bitsize */
390 TRUE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 ppc64_elf_brtaken_reloc, /* special_function */
394 "R_PPC64_REL14_BRTAKEN", /* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0x0000fffc, /* dst_mask */
398 TRUE), /* pcrel_offset */
399
400 /* A relative 16 bit branch. Bit 10 should be set to indicate that
401 the branch is not expected to be taken. The lower two bits must
402 be zero. */
403 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 TRUE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_signed, /* complain_on_overflow */
410 ppc64_elf_brtaken_reloc, /* special_function */
411 "R_PPC64_REL14_BRNTAKEN",/* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0x0000fffc, /* dst_mask */
415 TRUE), /* pcrel_offset */
416
417 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
418 symbol. */
419 HOWTO (R_PPC64_GOT16, /* type */
420 0, /* rightshift */
421 1, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 FALSE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_unhandled_reloc, /* special_function */
427 "R_PPC64_GOT16", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0xffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
434 the symbol. */
435 HOWTO (R_PPC64_GOT16_LO, /* type */
436 0, /* rightshift */
437 1, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 FALSE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_dont, /* complain_on_overflow */
442 ppc64_elf_unhandled_reloc, /* special_function */
443 "R_PPC64_GOT16_LO", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0xffff, /* dst_mask */
447 FALSE), /* pcrel_offset */
448
449 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
450 the symbol. */
451 HOWTO (R_PPC64_GOT16_HI, /* type */
452 16, /* rightshift */
453 1, /* size (0 = byte, 1 = short, 2 = long) */
454 16, /* bitsize */
455 FALSE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_dont,/* complain_on_overflow */
458 ppc64_elf_unhandled_reloc, /* special_function */
459 "R_PPC64_GOT16_HI", /* name */
460 FALSE, /* partial_inplace */
461 0, /* src_mask */
462 0xffff, /* dst_mask */
463 FALSE), /* pcrel_offset */
464
465 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
466 the symbol. */
467 HOWTO (R_PPC64_GOT16_HA, /* type */
468 16, /* rightshift */
469 1, /* size (0 = byte, 1 = short, 2 = long) */
470 16, /* bitsize */
471 FALSE, /* pc_relative */
472 0, /* bitpos */
473 complain_overflow_dont,/* complain_on_overflow */
474 ppc64_elf_unhandled_reloc, /* special_function */
475 "R_PPC64_GOT16_HA", /* name */
476 FALSE, /* partial_inplace */
477 0, /* src_mask */
478 0xffff, /* dst_mask */
479 FALSE), /* pcrel_offset */
480
481 /* This is used only by the dynamic linker. The symbol should exist
482 both in the object being run and in some shared library. The
483 dynamic linker copies the data addressed by the symbol from the
484 shared library into the object, because the object being
485 run has to have the data at some particular address. */
486 HOWTO (R_PPC64_COPY, /* type */
487 0, /* rightshift */
488 0, /* this one is variable size */
489 0, /* bitsize */
490 FALSE, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_dont, /* complain_on_overflow */
493 ppc64_elf_unhandled_reloc, /* special_function */
494 "R_PPC64_COPY", /* name */
495 FALSE, /* partial_inplace */
496 0, /* src_mask */
497 0, /* dst_mask */
498 FALSE), /* pcrel_offset */
499
500 /* Like R_PPC64_ADDR64, but used when setting global offset table
501 entries. */
502 HOWTO (R_PPC64_GLOB_DAT, /* type */
503 0, /* rightshift */
504 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
505 64, /* bitsize */
506 FALSE, /* pc_relative */
507 0, /* bitpos */
508 complain_overflow_dont, /* complain_on_overflow */
509 ppc64_elf_unhandled_reloc, /* special_function */
510 "R_PPC64_GLOB_DAT", /* name */
511 FALSE, /* partial_inplace */
512 0, /* src_mask */
513 ONES (64), /* dst_mask */
514 FALSE), /* pcrel_offset */
515
516 /* Created by the link editor. Marks a procedure linkage table
517 entry for a symbol. */
518 HOWTO (R_PPC64_JMP_SLOT, /* type */
519 0, /* rightshift */
520 0, /* size (0 = byte, 1 = short, 2 = long) */
521 0, /* bitsize */
522 FALSE, /* pc_relative */
523 0, /* bitpos */
524 complain_overflow_dont, /* complain_on_overflow */
525 ppc64_elf_unhandled_reloc, /* special_function */
526 "R_PPC64_JMP_SLOT", /* name */
527 FALSE, /* partial_inplace */
528 0, /* src_mask */
529 0, /* dst_mask */
530 FALSE), /* pcrel_offset */
531
532 /* Used only by the dynamic linker. When the object is run, this
533 doubleword64 is set to the load address of the object, plus the
534 addend. */
535 HOWTO (R_PPC64_RELATIVE, /* type */
536 0, /* rightshift */
537 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
538 64, /* bitsize */
539 FALSE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont, /* complain_on_overflow */
542 bfd_elf_generic_reloc, /* special_function */
543 "R_PPC64_RELATIVE", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 ONES (64), /* dst_mask */
547 FALSE), /* pcrel_offset */
548
549 /* Like R_PPC64_ADDR32, but may be unaligned. */
550 HOWTO (R_PPC64_UADDR32, /* type */
551 0, /* rightshift */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
553 32, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_bitfield, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC64_UADDR32", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0xffffffff, /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Like R_PPC64_ADDR16, but may be unaligned. */
565 HOWTO (R_PPC64_UADDR16, /* type */
566 0, /* rightshift */
567 1, /* size (0 = byte, 1 = short, 2 = long) */
568 16, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC64_UADDR16", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* 32-bit PC relative. */
580 HOWTO (R_PPC64_REL32, /* type */
581 0, /* rightshift */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
583 32, /* bitsize */
584 TRUE, /* pc_relative */
585 0, /* bitpos */
586 /* FIXME: Verify. Was complain_overflow_bitfield. */
587 complain_overflow_signed, /* complain_on_overflow */
588 bfd_elf_generic_reloc, /* special_function */
589 "R_PPC64_REL32", /* name */
590 FALSE, /* partial_inplace */
591 0, /* src_mask */
592 0xffffffff, /* dst_mask */
593 TRUE), /* pcrel_offset */
594
595 /* 32-bit relocation to the symbol's procedure linkage table. */
596 HOWTO (R_PPC64_PLT32, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 ppc64_elf_unhandled_reloc, /* special_function */
604 "R_PPC64_PLT32", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0xffffffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
611 FIXME: R_PPC64_PLTREL32 not supported. */
612 HOWTO (R_PPC64_PLTREL32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 TRUE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_signed, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC64_PLTREL32", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 0xffffffff, /* dst_mask */
624 TRUE), /* pcrel_offset */
625
626 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
627 the symbol. */
628 HOWTO (R_PPC64_PLT16_LO, /* type */
629 0, /* rightshift */
630 1, /* size (0 = byte, 1 = short, 2 = long) */
631 16, /* bitsize */
632 FALSE, /* pc_relative */
633 0, /* bitpos */
634 complain_overflow_dont, /* complain_on_overflow */
635 ppc64_elf_unhandled_reloc, /* special_function */
636 "R_PPC64_PLT16_LO", /* name */
637 FALSE, /* partial_inplace */
638 0, /* src_mask */
639 0xffff, /* dst_mask */
640 FALSE), /* pcrel_offset */
641
642 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
643 the symbol. */
644 HOWTO (R_PPC64_PLT16_HI, /* type */
645 16, /* rightshift */
646 1, /* size (0 = byte, 1 = short, 2 = long) */
647 16, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_dont, /* complain_on_overflow */
651 ppc64_elf_unhandled_reloc, /* special_function */
652 "R_PPC64_PLT16_HI", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
659 the symbol. */
660 HOWTO (R_PPC64_PLT16_HA, /* type */
661 16, /* rightshift */
662 1, /* size (0 = byte, 1 = short, 2 = long) */
663 16, /* bitsize */
664 FALSE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_dont, /* complain_on_overflow */
667 ppc64_elf_unhandled_reloc, /* special_function */
668 "R_PPC64_PLT16_HA", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffff, /* dst_mask */
672 FALSE), /* pcrel_offset */
673
674 /* 16-bit section relative relocation. */
675 HOWTO (R_PPC64_SECTOFF, /* type */
676 0, /* rightshift */
677 1, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 FALSE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_bitfield, /* complain_on_overflow */
682 ppc64_elf_sectoff_reloc, /* special_function */
683 "R_PPC64_SECTOFF", /* name */
684 FALSE, /* partial_inplace */
685 0, /* src_mask */
686 0xffff, /* dst_mask */
687 FALSE), /* pcrel_offset */
688
689 /* Like R_PPC64_SECTOFF, but no overflow warning. */
690 HOWTO (R_PPC64_SECTOFF_LO, /* type */
691 0, /* rightshift */
692 1, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_dont, /* complain_on_overflow */
697 ppc64_elf_sectoff_reloc, /* special_function */
698 "R_PPC64_SECTOFF_LO", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 /* 16-bit upper half section relative relocation. */
705 HOWTO (R_PPC64_SECTOFF_HI, /* type */
706 16, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_dont, /* complain_on_overflow */
712 ppc64_elf_sectoff_reloc, /* special_function */
713 "R_PPC64_SECTOFF_HI", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* 16-bit upper half adjusted section relative relocation. */
720 HOWTO (R_PPC64_SECTOFF_HA, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 ppc64_elf_sectoff_ha_reloc, /* special_function */
728 "R_PPC64_SECTOFF_HA", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* Like R_PPC64_REL24 without touching the two least significant bits. */
735 HOWTO (R_PPC64_REL30, /* type */
736 2, /* rightshift */
737 2, /* size (0 = byte, 1 = short, 2 = long) */
738 30, /* bitsize */
739 TRUE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_dont, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_PPC64_REL30", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xfffffffc, /* dst_mask */
747 TRUE), /* pcrel_offset */
748
749 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
750
751 /* A standard 64-bit relocation. */
752 HOWTO (R_PPC64_ADDR64, /* type */
753 0, /* rightshift */
754 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
755 64, /* bitsize */
756 FALSE, /* pc_relative */
757 0, /* bitpos */
758 complain_overflow_dont, /* complain_on_overflow */
759 bfd_elf_generic_reloc, /* special_function */
760 "R_PPC64_ADDR64", /* name */
761 FALSE, /* partial_inplace */
762 0, /* src_mask */
763 ONES (64), /* dst_mask */
764 FALSE), /* pcrel_offset */
765
766 /* The bits 32-47 of an address. */
767 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
768 32, /* rightshift */
769 1, /* size (0 = byte, 1 = short, 2 = long) */
770 16, /* bitsize */
771 FALSE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_dont, /* complain_on_overflow */
774 bfd_elf_generic_reloc, /* special_function */
775 "R_PPC64_ADDR16_HIGHER", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 0xffff, /* dst_mask */
779 FALSE), /* pcrel_offset */
780
781 /* The bits 32-47 of an address, plus 1 if the contents of the low
782 16 bits, treated as a signed number, is negative. */
783 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
784 32, /* rightshift */
785 1, /* size (0 = byte, 1 = short, 2 = long) */
786 16, /* bitsize */
787 FALSE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_dont, /* complain_on_overflow */
790 ppc64_elf_ha_reloc, /* special_function */
791 "R_PPC64_ADDR16_HIGHERA", /* name */
792 FALSE, /* partial_inplace */
793 0, /* src_mask */
794 0xffff, /* dst_mask */
795 FALSE), /* pcrel_offset */
796
797 /* The bits 48-63 of an address. */
798 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
799 48, /* rightshift */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
801 16, /* bitsize */
802 FALSE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_dont, /* complain_on_overflow */
805 bfd_elf_generic_reloc, /* special_function */
806 "R_PPC64_ADDR16_HIGHEST", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0xffff, /* dst_mask */
810 FALSE), /* pcrel_offset */
811
812 /* The bits 48-63 of an address, plus 1 if the contents of the low
813 16 bits, treated as a signed number, is negative. */
814 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
815 48, /* rightshift */
816 1, /* size (0 = byte, 1 = short, 2 = long) */
817 16, /* bitsize */
818 FALSE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_dont, /* complain_on_overflow */
821 ppc64_elf_ha_reloc, /* special_function */
822 "R_PPC64_ADDR16_HIGHESTA", /* name */
823 FALSE, /* partial_inplace */
824 0, /* src_mask */
825 0xffff, /* dst_mask */
826 FALSE), /* pcrel_offset */
827
828 /* Like ADDR64, but may be unaligned. */
829 HOWTO (R_PPC64_UADDR64, /* type */
830 0, /* rightshift */
831 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
832 64, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_dont, /* complain_on_overflow */
836 bfd_elf_generic_reloc, /* special_function */
837 "R_PPC64_UADDR64", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 ONES (64), /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* 64-bit relative relocation. */
844 HOWTO (R_PPC64_REL64, /* type */
845 0, /* rightshift */
846 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
847 64, /* bitsize */
848 TRUE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 bfd_elf_generic_reloc, /* special_function */
852 "R_PPC64_REL64", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 ONES (64), /* dst_mask */
856 TRUE), /* pcrel_offset */
857
858 /* 64-bit relocation to the symbol's procedure linkage table. */
859 HOWTO (R_PPC64_PLT64, /* type */
860 0, /* rightshift */
861 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
862 64, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc64_elf_unhandled_reloc, /* special_function */
867 "R_PPC64_PLT64", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 ONES (64), /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* 64-bit PC relative relocation to the symbol's procedure linkage
874 table. */
875 /* FIXME: R_PPC64_PLTREL64 not supported. */
876 HOWTO (R_PPC64_PLTREL64, /* type */
877 0, /* rightshift */
878 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
879 64, /* bitsize */
880 TRUE, /* pc_relative */
881 0, /* bitpos */
882 complain_overflow_dont, /* complain_on_overflow */
883 ppc64_elf_unhandled_reloc, /* special_function */
884 "R_PPC64_PLTREL64", /* name */
885 FALSE, /* partial_inplace */
886 0, /* src_mask */
887 ONES (64), /* dst_mask */
888 TRUE), /* pcrel_offset */
889
890 /* 16 bit TOC-relative relocation. */
891
892 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
893 HOWTO (R_PPC64_TOC16, /* type */
894 0, /* rightshift */
895 1, /* size (0 = byte, 1 = short, 2 = long) */
896 16, /* bitsize */
897 FALSE, /* pc_relative */
898 0, /* bitpos */
899 complain_overflow_signed, /* complain_on_overflow */
900 ppc64_elf_toc_reloc, /* special_function */
901 "R_PPC64_TOC16", /* name */
902 FALSE, /* partial_inplace */
903 0, /* src_mask */
904 0xffff, /* dst_mask */
905 FALSE), /* pcrel_offset */
906
907 /* 16 bit TOC-relative relocation without overflow. */
908
909 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
910 HOWTO (R_PPC64_TOC16_LO, /* type */
911 0, /* rightshift */
912 1, /* size (0 = byte, 1 = short, 2 = long) */
913 16, /* bitsize */
914 FALSE, /* pc_relative */
915 0, /* bitpos */
916 complain_overflow_dont, /* complain_on_overflow */
917 ppc64_elf_toc_reloc, /* special_function */
918 "R_PPC64_TOC16_LO", /* name */
919 FALSE, /* partial_inplace */
920 0, /* src_mask */
921 0xffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
923
924 /* 16 bit TOC-relative relocation, high 16 bits. */
925
926 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
927 HOWTO (R_PPC64_TOC16_HI, /* type */
928 16, /* rightshift */
929 1, /* size (0 = byte, 1 = short, 2 = long) */
930 16, /* bitsize */
931 FALSE, /* pc_relative */
932 0, /* bitpos */
933 complain_overflow_dont, /* complain_on_overflow */
934 ppc64_elf_toc_reloc, /* special_function */
935 "R_PPC64_TOC16_HI", /* name */
936 FALSE, /* partial_inplace */
937 0, /* src_mask */
938 0xffff, /* dst_mask */
939 FALSE), /* pcrel_offset */
940
941 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
942 contents of the low 16 bits, treated as a signed number, is
943 negative. */
944
945 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
946 HOWTO (R_PPC64_TOC16_HA, /* type */
947 16, /* rightshift */
948 1, /* size (0 = byte, 1 = short, 2 = long) */
949 16, /* bitsize */
950 FALSE, /* pc_relative */
951 0, /* bitpos */
952 complain_overflow_dont, /* complain_on_overflow */
953 ppc64_elf_toc_ha_reloc, /* special_function */
954 "R_PPC64_TOC16_HA", /* name */
955 FALSE, /* partial_inplace */
956 0, /* src_mask */
957 0xffff, /* dst_mask */
958 FALSE), /* pcrel_offset */
959
960 /* 64-bit relocation; insert value of TOC base (.TOC.). */
961
962 /* R_PPC64_TOC 51 doubleword64 .TOC. */
963 HOWTO (R_PPC64_TOC, /* type */
964 0, /* rightshift */
965 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
966 64, /* bitsize */
967 FALSE, /* pc_relative */
968 0, /* bitpos */
969 complain_overflow_bitfield, /* complain_on_overflow */
970 ppc64_elf_toc64_reloc, /* special_function */
971 "R_PPC64_TOC", /* name */
972 FALSE, /* partial_inplace */
973 0, /* src_mask */
974 ONES (64), /* dst_mask */
975 FALSE), /* pcrel_offset */
976
977 /* Like R_PPC64_GOT16, but also informs the link editor that the
978 value to relocate may (!) refer to a PLT entry which the link
979 editor (a) may replace with the symbol value. If the link editor
980 is unable to fully resolve the symbol, it may (b) create a PLT
981 entry and store the address to the new PLT entry in the GOT.
982 This permits lazy resolution of function symbols at run time.
983 The link editor may also skip all of this and just (c) emit a
984 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
985 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
986 HOWTO (R_PPC64_PLTGOT16, /* type */
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_signed, /* complain_on_overflow */
993 ppc64_elf_unhandled_reloc, /* special_function */
994 "R_PPC64_PLTGOT16", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like R_PPC64_PLTGOT16, but without overflow. */
1001 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1002 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1003 0, /* rightshift */
1004 1, /* size (0 = byte, 1 = short, 2 = long) */
1005 16, /* bitsize */
1006 FALSE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_dont, /* complain_on_overflow */
1009 ppc64_elf_unhandled_reloc, /* special_function */
1010 "R_PPC64_PLTGOT16_LO", /* name */
1011 FALSE, /* partial_inplace */
1012 0, /* src_mask */
1013 0xffff, /* dst_mask */
1014 FALSE), /* pcrel_offset */
1015
1016 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1017 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1018 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc64_elf_unhandled_reloc, /* special_function */
1026 "R_PPC64_PLTGOT16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1033 1 if the contents of the low 16 bits, treated as a signed number,
1034 is negative. */
1035 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1036 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1037 16, /* rightshift */
1038 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 16, /* bitsize */
1040 FALSE, /* pc_relative */
1041 0, /* bitpos */
1042 complain_overflow_dont,/* complain_on_overflow */
1043 ppc64_elf_unhandled_reloc, /* special_function */
1044 "R_PPC64_PLTGOT16_HA", /* name */
1045 FALSE, /* partial_inplace */
1046 0, /* src_mask */
1047 0xffff, /* dst_mask */
1048 FALSE), /* pcrel_offset */
1049
1050 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1051 HOWTO (R_PPC64_ADDR16_DS, /* type */
1052 0, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1054 16, /* bitsize */
1055 FALSE, /* pc_relative */
1056 0, /* bitpos */
1057 complain_overflow_bitfield, /* complain_on_overflow */
1058 bfd_elf_generic_reloc, /* special_function */
1059 "R_PPC64_ADDR16_DS", /* name */
1060 FALSE, /* partial_inplace */
1061 0, /* src_mask */
1062 0xfffc, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1064
1065 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1066 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1067 0, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_dont,/* complain_on_overflow */
1073 bfd_elf_generic_reloc, /* special_function */
1074 "R_PPC64_ADDR16_LO_DS",/* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xfffc, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1081 HOWTO (R_PPC64_GOT16_DS, /* type */
1082 0, /* rightshift */
1083 1, /* size (0 = byte, 1 = short, 2 = long) */
1084 16, /* bitsize */
1085 FALSE, /* pc_relative */
1086 0, /* bitpos */
1087 complain_overflow_signed, /* complain_on_overflow */
1088 ppc64_elf_unhandled_reloc, /* special_function */
1089 "R_PPC64_GOT16_DS", /* name */
1090 FALSE, /* partial_inplace */
1091 0, /* src_mask */
1092 0xfffc, /* dst_mask */
1093 FALSE), /* pcrel_offset */
1094
1095 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1096 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1097 0, /* rightshift */
1098 1, /* size (0 = byte, 1 = short, 2 = long) */
1099 16, /* bitsize */
1100 FALSE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_dont, /* complain_on_overflow */
1103 ppc64_elf_unhandled_reloc, /* special_function */
1104 "R_PPC64_GOT16_LO_DS", /* name */
1105 FALSE, /* partial_inplace */
1106 0, /* src_mask */
1107 0xfffc, /* dst_mask */
1108 FALSE), /* pcrel_offset */
1109
1110 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1111 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_dont, /* complain_on_overflow */
1118 ppc64_elf_unhandled_reloc, /* special_function */
1119 "R_PPC64_PLT16_LO_DS", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xfffc, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1126 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_bitfield, /* complain_on_overflow */
1133 ppc64_elf_sectoff_reloc, /* special_function */
1134 "R_PPC64_SECTOFF_DS", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xfffc, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1141 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1142 0, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc64_elf_sectoff_reloc, /* special_function */
1149 "R_PPC64_SECTOFF_LO_DS",/* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xfffc, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1156 HOWTO (R_PPC64_TOC16_DS, /* type */
1157 0, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_signed, /* complain_on_overflow */
1163 ppc64_elf_toc_reloc, /* special_function */
1164 "R_PPC64_TOC16_DS", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xfffc, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1171 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_dont, /* complain_on_overflow */
1178 ppc64_elf_toc_reloc, /* special_function */
1179 "R_PPC64_TOC16_LO_DS", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xfffc, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1186 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1187 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_signed, /* complain_on_overflow */
1194 ppc64_elf_unhandled_reloc, /* special_function */
1195 "R_PPC64_PLTGOT16_DS", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xfffc, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1202 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1203 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1204 0, /* rightshift */
1205 1, /* size (0 = byte, 1 = short, 2 = long) */
1206 16, /* bitsize */
1207 FALSE, /* pc_relative */
1208 0, /* bitpos */
1209 complain_overflow_dont, /* complain_on_overflow */
1210 ppc64_elf_unhandled_reloc, /* special_function */
1211 "R_PPC64_PLTGOT16_LO_DS",/* name */
1212 FALSE, /* partial_inplace */
1213 0, /* src_mask */
1214 0xfffc, /* dst_mask */
1215 FALSE), /* pcrel_offset */
1216
1217 /* Marker reloc for TLS. */
1218 HOWTO (R_PPC64_TLS,
1219 0, /* rightshift */
1220 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 32, /* bitsize */
1222 FALSE, /* pc_relative */
1223 0, /* bitpos */
1224 complain_overflow_dont, /* complain_on_overflow */
1225 bfd_elf_generic_reloc, /* special_function */
1226 "R_PPC64_TLS", /* name */
1227 FALSE, /* partial_inplace */
1228 0, /* src_mask */
1229 0, /* dst_mask */
1230 FALSE), /* pcrel_offset */
1231
1232 /* Computes the load module index of the load module that contains the
1233 definition of its TLS sym. */
1234 HOWTO (R_PPC64_DTPMOD64,
1235 0, /* rightshift */
1236 4, /* size (0 = byte, 1 = short, 2 = long) */
1237 64, /* bitsize */
1238 FALSE, /* pc_relative */
1239 0, /* bitpos */
1240 complain_overflow_dont, /* complain_on_overflow */
1241 ppc64_elf_unhandled_reloc, /* special_function */
1242 "R_PPC64_DTPMOD64", /* name */
1243 FALSE, /* partial_inplace */
1244 0, /* src_mask */
1245 ONES (64), /* dst_mask */
1246 FALSE), /* pcrel_offset */
1247
1248 /* Computes a dtv-relative displacement, the difference between the value
1249 of sym+add and the base address of the thread-local storage block that
1250 contains the definition of sym, minus 0x8000. */
1251 HOWTO (R_PPC64_DTPREL64,
1252 0, /* rightshift */
1253 4, /* size (0 = byte, 1 = short, 2 = long) */
1254 64, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc64_elf_unhandled_reloc, /* special_function */
1259 "R_PPC64_DTPREL64", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 ONES (64), /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* A 16 bit dtprel reloc. */
1266 HOWTO (R_PPC64_DTPREL16,
1267 0, /* rightshift */
1268 1, /* size (0 = byte, 1 = short, 2 = long) */
1269 16, /* bitsize */
1270 FALSE, /* pc_relative */
1271 0, /* bitpos */
1272 complain_overflow_signed, /* complain_on_overflow */
1273 ppc64_elf_unhandled_reloc, /* special_function */
1274 "R_PPC64_DTPREL16", /* name */
1275 FALSE, /* partial_inplace */
1276 0, /* src_mask */
1277 0xffff, /* dst_mask */
1278 FALSE), /* pcrel_offset */
1279
1280 /* Like DTPREL16, but no overflow. */
1281 HOWTO (R_PPC64_DTPREL16_LO,
1282 0, /* rightshift */
1283 1, /* size (0 = byte, 1 = short, 2 = long) */
1284 16, /* bitsize */
1285 FALSE, /* pc_relative */
1286 0, /* bitpos */
1287 complain_overflow_dont, /* complain_on_overflow */
1288 ppc64_elf_unhandled_reloc, /* special_function */
1289 "R_PPC64_DTPREL16_LO", /* name */
1290 FALSE, /* partial_inplace */
1291 0, /* src_mask */
1292 0xffff, /* dst_mask */
1293 FALSE), /* pcrel_offset */
1294
1295 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1296 HOWTO (R_PPC64_DTPREL16_HI,
1297 16, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 ppc64_elf_unhandled_reloc, /* special_function */
1304 "R_PPC64_DTPREL16_HI", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1311 HOWTO (R_PPC64_DTPREL16_HA,
1312 16, /* rightshift */
1313 1, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_dont, /* complain_on_overflow */
1318 ppc64_elf_unhandled_reloc, /* special_function */
1319 "R_PPC64_DTPREL16_HA", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1326 HOWTO (R_PPC64_DTPREL16_HIGHER,
1327 32, /* rightshift */
1328 1, /* size (0 = byte, 1 = short, 2 = long) */
1329 16, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL16_HIGHER", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 0xffff, /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1341 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1342 32, /* rightshift */
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1344 16, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_dont, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16_HIGHERA", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1356 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1357 48, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_HIGHEST", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1372 48, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16, but for insns with a DS field. */
1386 HOWTO (R_PPC64_DTPREL16_DS,
1387 0, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_signed, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_DS", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xfffc, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16_DS, but no overflow. */
1401 HOWTO (R_PPC64_DTPREL16_LO_DS,
1402 0, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_LO_DS", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xfffc, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Computes a tp-relative displacement, the difference between the value of
1416 sym+add and the value of the thread pointer (r13). */
1417 HOWTO (R_PPC64_TPREL64,
1418 0, /* rightshift */
1419 4, /* size (0 = byte, 1 = short, 2 = long) */
1420 64, /* bitsize */
1421 FALSE, /* pc_relative */
1422 0, /* bitpos */
1423 complain_overflow_dont, /* complain_on_overflow */
1424 ppc64_elf_unhandled_reloc, /* special_function */
1425 "R_PPC64_TPREL64", /* name */
1426 FALSE, /* partial_inplace */
1427 0, /* src_mask */
1428 ONES (64), /* dst_mask */
1429 FALSE), /* pcrel_offset */
1430
1431 /* A 16 bit tprel reloc. */
1432 HOWTO (R_PPC64_TPREL16,
1433 0, /* rightshift */
1434 1, /* size (0 = byte, 1 = short, 2 = long) */
1435 16, /* bitsize */
1436 FALSE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_signed, /* complain_on_overflow */
1439 ppc64_elf_unhandled_reloc, /* special_function */
1440 "R_PPC64_TPREL16", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0xffff, /* dst_mask */
1444 FALSE), /* pcrel_offset */
1445
1446 /* Like TPREL16, but no overflow. */
1447 HOWTO (R_PPC64_TPREL16_LO,
1448 0, /* rightshift */
1449 1, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 ppc64_elf_unhandled_reloc, /* special_function */
1455 "R_PPC64_TPREL16_LO", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0xffff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* Like TPREL16_LO, but next higher group of 16 bits. */
1462 HOWTO (R_PPC64_TPREL16_HI,
1463 16, /* rightshift */
1464 1, /* size (0 = byte, 1 = short, 2 = long) */
1465 16, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 ppc64_elf_unhandled_reloc, /* special_function */
1470 "R_PPC64_TPREL16_HI", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0xffff, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Like TPREL16_HI, but adjust for low 16 bits. */
1477 HOWTO (R_PPC64_TPREL16_HA,
1478 16, /* rightshift */
1479 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_dont, /* complain_on_overflow */
1484 ppc64_elf_unhandled_reloc, /* special_function */
1485 "R_PPC64_TPREL16_HA", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0xffff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490
1491 /* Like TPREL16_HI, but next higher group of 16 bits. */
1492 HOWTO (R_PPC64_TPREL16_HIGHER,
1493 32, /* rightshift */
1494 1, /* size (0 = byte, 1 = short, 2 = long) */
1495 16, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL16_HIGHER", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 0xffff, /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1507 HOWTO (R_PPC64_TPREL16_HIGHERA,
1508 32, /* rightshift */
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16_HIGHERA", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1522 HOWTO (R_PPC64_TPREL16_HIGHEST,
1523 48, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_HIGHEST", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1538 48, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HIGHESTA", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16, but for insns with a DS field. */
1552 HOWTO (R_PPC64_TPREL16_DS,
1553 0, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_signed, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_DS", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xfffc, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16_DS, but no overflow. */
1567 HOWTO (R_PPC64_TPREL16_LO_DS,
1568 0, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_LO_DS", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xfffc, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1582 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1583 to the first entry relative to the TOC base (r2). */
1584 HOWTO (R_PPC64_GOT_TLSGD16,
1585 0, /* rightshift */
1586 1, /* size (0 = byte, 1 = short, 2 = long) */
1587 16, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_signed, /* complain_on_overflow */
1591 ppc64_elf_unhandled_reloc, /* special_function */
1592 "R_PPC64_GOT_TLSGD16", /* name */
1593 FALSE, /* partial_inplace */
1594 0, /* src_mask */
1595 0xffff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597
1598 /* Like GOT_TLSGD16, but no overflow. */
1599 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1600 0, /* rightshift */
1601 1, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_dont, /* complain_on_overflow */
1606 ppc64_elf_unhandled_reloc, /* special_function */
1607 "R_PPC64_GOT_TLSGD16_LO", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0xffff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1614 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1615 16, /* rightshift */
1616 1, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 ppc64_elf_unhandled_reloc, /* special_function */
1622 "R_PPC64_GOT_TLSGD16_HI", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0xffff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1629 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1630 16, /* rightshift */
1631 1, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 ppc64_elf_unhandled_reloc, /* special_function */
1637 "R_PPC64_GOT_TLSGD16_HA", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0xffff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1644 with values (sym+add)@dtpmod and zero, and computes the offset to the
1645 first entry relative to the TOC base (r2). */
1646 HOWTO (R_PPC64_GOT_TLSLD16,
1647 0, /* rightshift */
1648 1, /* size (0 = byte, 1 = short, 2 = long) */
1649 16, /* bitsize */
1650 FALSE, /* pc_relative */
1651 0, /* bitpos */
1652 complain_overflow_signed, /* complain_on_overflow */
1653 ppc64_elf_unhandled_reloc, /* special_function */
1654 "R_PPC64_GOT_TLSLD16", /* name */
1655 FALSE, /* partial_inplace */
1656 0, /* src_mask */
1657 0xffff, /* dst_mask */
1658 FALSE), /* pcrel_offset */
1659
1660 /* Like GOT_TLSLD16, but no overflow. */
1661 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1662 0, /* rightshift */
1663 1, /* size (0 = byte, 1 = short, 2 = long) */
1664 16, /* bitsize */
1665 FALSE, /* pc_relative */
1666 0, /* bitpos */
1667 complain_overflow_dont, /* complain_on_overflow */
1668 ppc64_elf_unhandled_reloc, /* special_function */
1669 "R_PPC64_GOT_TLSLD16_LO", /* name */
1670 FALSE, /* partial_inplace */
1671 0, /* src_mask */
1672 0xffff, /* dst_mask */
1673 FALSE), /* pcrel_offset */
1674
1675 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1676 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1677 16, /* rightshift */
1678 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 16, /* bitsize */
1680 FALSE, /* pc_relative */
1681 0, /* bitpos */
1682 complain_overflow_dont, /* complain_on_overflow */
1683 ppc64_elf_unhandled_reloc, /* special_function */
1684 "R_PPC64_GOT_TLSLD16_HI", /* name */
1685 FALSE, /* partial_inplace */
1686 0, /* src_mask */
1687 0xffff, /* dst_mask */
1688 FALSE), /* pcrel_offset */
1689
1690 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1691 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1692 16, /* rightshift */
1693 1, /* size (0 = byte, 1 = short, 2 = long) */
1694 16, /* bitsize */
1695 FALSE, /* pc_relative */
1696 0, /* bitpos */
1697 complain_overflow_dont, /* complain_on_overflow */
1698 ppc64_elf_unhandled_reloc, /* special_function */
1699 "R_PPC64_GOT_TLSLD16_HA", /* name */
1700 FALSE, /* partial_inplace */
1701 0, /* src_mask */
1702 0xffff, /* dst_mask */
1703 FALSE), /* pcrel_offset */
1704
1705 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1706 the offset to the entry relative to the TOC base (r2). */
1707 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1708 0, /* rightshift */
1709 1, /* size (0 = byte, 1 = short, 2 = long) */
1710 16, /* bitsize */
1711 FALSE, /* pc_relative */
1712 0, /* bitpos */
1713 complain_overflow_signed, /* complain_on_overflow */
1714 ppc64_elf_unhandled_reloc, /* special_function */
1715 "R_PPC64_GOT_DTPREL16_DS", /* name */
1716 FALSE, /* partial_inplace */
1717 0, /* src_mask */
1718 0xfffc, /* dst_mask */
1719 FALSE), /* pcrel_offset */
1720
1721 /* Like GOT_DTPREL16_DS, but no overflow. */
1722 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1723 0, /* rightshift */
1724 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 16, /* bitsize */
1726 FALSE, /* pc_relative */
1727 0, /* bitpos */
1728 complain_overflow_dont, /* complain_on_overflow */
1729 ppc64_elf_unhandled_reloc, /* special_function */
1730 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1731 FALSE, /* partial_inplace */
1732 0, /* src_mask */
1733 0xfffc, /* dst_mask */
1734 FALSE), /* pcrel_offset */
1735
1736 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1737 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1738 16, /* rightshift */
1739 1, /* size (0 = byte, 1 = short, 2 = long) */
1740 16, /* bitsize */
1741 FALSE, /* pc_relative */
1742 0, /* bitpos */
1743 complain_overflow_dont, /* complain_on_overflow */
1744 ppc64_elf_unhandled_reloc, /* special_function */
1745 "R_PPC64_GOT_DTPREL16_HI", /* name */
1746 FALSE, /* partial_inplace */
1747 0, /* src_mask */
1748 0xffff, /* dst_mask */
1749 FALSE), /* pcrel_offset */
1750
1751 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1752 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1753 16, /* rightshift */
1754 1, /* size (0 = byte, 1 = short, 2 = long) */
1755 16, /* bitsize */
1756 FALSE, /* pc_relative */
1757 0, /* bitpos */
1758 complain_overflow_dont, /* complain_on_overflow */
1759 ppc64_elf_unhandled_reloc, /* special_function */
1760 "R_PPC64_GOT_DTPREL16_HA", /* name */
1761 FALSE, /* partial_inplace */
1762 0, /* src_mask */
1763 0xffff, /* dst_mask */
1764 FALSE), /* pcrel_offset */
1765
1766 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1767 offset to the entry relative to the TOC base (r2). */
1768 HOWTO (R_PPC64_GOT_TPREL16_DS,
1769 0, /* rightshift */
1770 1, /* size (0 = byte, 1 = short, 2 = long) */
1771 16, /* bitsize */
1772 FALSE, /* pc_relative */
1773 0, /* bitpos */
1774 complain_overflow_signed, /* complain_on_overflow */
1775 ppc64_elf_unhandled_reloc, /* special_function */
1776 "R_PPC64_GOT_TPREL16_DS", /* name */
1777 FALSE, /* partial_inplace */
1778 0, /* src_mask */
1779 0xfffc, /* dst_mask */
1780 FALSE), /* pcrel_offset */
1781
1782 /* Like GOT_TPREL16_DS, but no overflow. */
1783 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1784 0, /* rightshift */
1785 1, /* size (0 = byte, 1 = short, 2 = long) */
1786 16, /* bitsize */
1787 FALSE, /* pc_relative */
1788 0, /* bitpos */
1789 complain_overflow_dont, /* complain_on_overflow */
1790 ppc64_elf_unhandled_reloc, /* special_function */
1791 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1792 FALSE, /* partial_inplace */
1793 0, /* src_mask */
1794 0xfffc, /* dst_mask */
1795 FALSE), /* pcrel_offset */
1796
1797 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1798 HOWTO (R_PPC64_GOT_TPREL16_HI,
1799 16, /* rightshift */
1800 1, /* size (0 = byte, 1 = short, 2 = long) */
1801 16, /* bitsize */
1802 FALSE, /* pc_relative */
1803 0, /* bitpos */
1804 complain_overflow_dont, /* complain_on_overflow */
1805 ppc64_elf_unhandled_reloc, /* special_function */
1806 "R_PPC64_GOT_TPREL16_HI", /* name */
1807 FALSE, /* partial_inplace */
1808 0, /* src_mask */
1809 0xffff, /* dst_mask */
1810 FALSE), /* pcrel_offset */
1811
1812 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1813 HOWTO (R_PPC64_GOT_TPREL16_HA,
1814 16, /* rightshift */
1815 1, /* size (0 = byte, 1 = short, 2 = long) */
1816 16, /* bitsize */
1817 FALSE, /* pc_relative */
1818 0, /* bitpos */
1819 complain_overflow_dont, /* complain_on_overflow */
1820 ppc64_elf_unhandled_reloc, /* special_function */
1821 "R_PPC64_GOT_TPREL16_HA", /* name */
1822 FALSE, /* partial_inplace */
1823 0, /* src_mask */
1824 0xffff, /* dst_mask */
1825 FALSE), /* pcrel_offset */
1826
1827 /* GNU extension to record C++ vtable hierarchy. */
1828 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1829 0, /* rightshift */
1830 0, /* size (0 = byte, 1 = short, 2 = long) */
1831 0, /* bitsize */
1832 FALSE, /* pc_relative */
1833 0, /* bitpos */
1834 complain_overflow_dont, /* complain_on_overflow */
1835 NULL, /* special_function */
1836 "R_PPC64_GNU_VTINHERIT", /* name */
1837 FALSE, /* partial_inplace */
1838 0, /* src_mask */
1839 0, /* dst_mask */
1840 FALSE), /* pcrel_offset */
1841
1842 /* GNU extension to record C++ vtable member usage. */
1843 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1844 0, /* rightshift */
1845 0, /* size (0 = byte, 1 = short, 2 = long) */
1846 0, /* bitsize */
1847 FALSE, /* pc_relative */
1848 0, /* bitpos */
1849 complain_overflow_dont, /* complain_on_overflow */
1850 NULL, /* special_function */
1851 "R_PPC64_GNU_VTENTRY", /* name */
1852 FALSE, /* partial_inplace */
1853 0, /* src_mask */
1854 0, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1856 };
1857
1858 \f
1859 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1860 be done. */
1861
1862 static void
1863 ppc_howto_init (void)
1864 {
1865 unsigned int i, type;
1866
1867 for (i = 0;
1868 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1869 i++)
1870 {
1871 type = ppc64_elf_howto_raw[i].type;
1872 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1873 / sizeof (ppc64_elf_howto_table[0])));
1874 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1875 }
1876 }
1877
1878 static reloc_howto_type *
1879 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1880 bfd_reloc_code_real_type code)
1881 {
1882 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1883
1884 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1885 /* Initialize howto table if needed. */
1886 ppc_howto_init ();
1887
1888 switch (code)
1889 {
1890 default:
1891 return NULL;
1892
1893 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1894 break;
1895 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1896 break;
1897 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1898 break;
1899 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1900 break;
1901 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1902 break;
1903 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1904 break;
1905 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1906 break;
1907 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1908 break;
1909 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1910 break;
1911 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1912 break;
1913 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1914 break;
1915 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1916 break;
1917 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1918 break;
1919 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1920 break;
1921 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1922 break;
1923 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1924 break;
1925 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1926 break;
1927 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1928 break;
1929 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1930 break;
1931 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1932 break;
1933 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1934 break;
1935 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1936 break;
1937 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1938 break;
1939 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1940 break;
1941 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1942 break;
1943 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1944 break;
1945 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1946 break;
1947 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1948 break;
1949 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1950 break;
1951 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1952 break;
1953 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1954 break;
1955 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1956 break;
1957 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1958 break;
1959 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1960 break;
1961 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1962 break;
1963 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1964 break;
1965 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1966 break;
1967 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1968 break;
1969 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1970 break;
1971 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1972 break;
1973 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1974 break;
1975 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1976 break;
1977 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1978 break;
1979 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1980 break;
1981 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1982 break;
1983 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1984 break;
1985 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1986 break;
1987 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1988 break;
1989 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1990 break;
1991 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1992 break;
1993 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1994 break;
1995 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1996 break;
1997 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1998 break;
1999 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2000 break;
2001 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2002 break;
2003 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2004 break;
2005 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2006 break;
2007 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2008 break;
2009 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2010 break;
2011 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2012 break;
2013 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2014 break;
2015 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2016 break;
2017 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2018 break;
2019 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2020 break;
2021 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2022 break;
2023 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2024 break;
2025 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2026 break;
2027 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2028 break;
2029 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2030 break;
2031 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2032 break;
2033 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2034 break;
2035 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2036 break;
2037 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2038 break;
2039 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2040 break;
2041 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2052 break;
2053 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2054 break;
2055 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2058 break;
2059 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2064 break;
2065 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2066 break;
2067 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2068 break;
2069 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2070 break;
2071 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2072 break;
2073 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2074 break;
2075 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2076 break;
2077 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2078 break;
2079 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2080 break;
2081 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2082 break;
2083 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2084 break;
2085 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2086 break;
2087 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2088 break;
2089 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2090 break;
2091 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2092 break;
2093 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2094 break;
2095 }
2096
2097 return ppc64_elf_howto_table[r];
2098 };
2099
2100 /* Set the howto pointer for a PowerPC ELF reloc. */
2101
2102 static void
2103 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2104 Elf_Internal_Rela *dst)
2105 {
2106 unsigned int type;
2107
2108 /* Initialize howto table if needed. */
2109 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2110 ppc_howto_init ();
2111
2112 type = ELF64_R_TYPE (dst->r_info);
2113 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2114 / sizeof (ppc64_elf_howto_table[0])));
2115 cache_ptr->howto = ppc64_elf_howto_table[type];
2116 }
2117
2118 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2119
2120 static bfd_reloc_status_type
2121 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2122 void *data, asection *input_section,
2123 bfd *output_bfd, char **error_message)
2124 {
2125 /* If this is a relocatable link (output_bfd test tells us), just
2126 call the generic function. Any adjustment will be done at final
2127 link time. */
2128 if (output_bfd != NULL)
2129 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2130 input_section, output_bfd, error_message);
2131
2132 /* Adjust the addend for sign extension of the low 16 bits.
2133 We won't actually be using the low 16 bits, so trashing them
2134 doesn't matter. */
2135 reloc_entry->addend += 0x8000;
2136 return bfd_reloc_continue;
2137 }
2138
2139 static bfd_reloc_status_type
2140 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2141 void *data, asection *input_section,
2142 bfd *output_bfd, char **error_message)
2143 {
2144 if (output_bfd != NULL)
2145 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2146 input_section, output_bfd, error_message);
2147
2148 if (strcmp (symbol->section->name, ".opd") == 0)
2149 {
2150 bfd_vma dest = opd_entry_value (symbol->section,
2151 symbol->value + reloc_entry->addend,
2152 NULL, NULL);
2153 if (dest != (bfd_vma) -1)
2154 reloc_entry->addend = dest - (symbol->value
2155 + symbol->section->output_section->vma
2156 + symbol->section->output_offset);
2157 }
2158 return bfd_reloc_continue;
2159 }
2160
2161 static bfd_reloc_status_type
2162 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2163 void *data, asection *input_section,
2164 bfd *output_bfd, char **error_message)
2165 {
2166 long insn;
2167 enum elf_ppc64_reloc_type r_type;
2168 bfd_size_type octets;
2169 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2170 bfd_boolean is_power4 = FALSE;
2171
2172 /* If this is a relocatable link (output_bfd test tells us), just
2173 call the generic function. Any adjustment will be done at final
2174 link time. */
2175 if (output_bfd != NULL)
2176 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2177 input_section, output_bfd, error_message);
2178
2179 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2180 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2181 insn &= ~(0x01 << 21);
2182 r_type = reloc_entry->howto->type;
2183 if (r_type == R_PPC64_ADDR14_BRTAKEN
2184 || r_type == R_PPC64_REL14_BRTAKEN)
2185 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2186
2187 if (is_power4)
2188 {
2189 /* Set 'a' bit. This is 0b00010 in BO field for branch
2190 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2191 for branch on CTR insns (BO == 1a00t or 1a01t). */
2192 if ((insn & (0x14 << 21)) == (0x04 << 21))
2193 insn |= 0x02 << 21;
2194 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2195 insn |= 0x08 << 21;
2196 else
2197 goto out;
2198 }
2199 else
2200 {
2201 bfd_vma target = 0;
2202 bfd_vma from;
2203
2204 if (!bfd_is_com_section (symbol->section))
2205 target = symbol->value;
2206 target += symbol->section->output_section->vma;
2207 target += symbol->section->output_offset;
2208 target += reloc_entry->addend;
2209
2210 from = (reloc_entry->address
2211 + input_section->output_offset
2212 + input_section->output_section->vma);
2213
2214 /* Invert 'y' bit if not the default. */
2215 if ((bfd_signed_vma) (target - from) < 0)
2216 insn ^= 0x01 << 21;
2217 }
2218 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2219 out:
2220 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2221 input_section, output_bfd, error_message);
2222 }
2223
2224 static bfd_reloc_status_type
2225 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2226 void *data, asection *input_section,
2227 bfd *output_bfd, char **error_message)
2228 {
2229 /* If this is a relocatable link (output_bfd test tells us), just
2230 call the generic function. Any adjustment will be done at final
2231 link time. */
2232 if (output_bfd != NULL)
2233 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2234 input_section, output_bfd, error_message);
2235
2236 /* Subtract the symbol section base address. */
2237 reloc_entry->addend -= symbol->section->output_section->vma;
2238 return bfd_reloc_continue;
2239 }
2240
2241 static bfd_reloc_status_type
2242 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2243 void *data, asection *input_section,
2244 bfd *output_bfd, char **error_message)
2245 {
2246 /* If this is a relocatable link (output_bfd test tells us), just
2247 call the generic function. Any adjustment will be done at final
2248 link time. */
2249 if (output_bfd != NULL)
2250 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2251 input_section, output_bfd, error_message);
2252
2253 /* Subtract the symbol section base address. */
2254 reloc_entry->addend -= symbol->section->output_section->vma;
2255
2256 /* Adjust the addend for sign extension of the low 16 bits. */
2257 reloc_entry->addend += 0x8000;
2258 return bfd_reloc_continue;
2259 }
2260
2261 static bfd_reloc_status_type
2262 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2263 void *data, asection *input_section,
2264 bfd *output_bfd, char **error_message)
2265 {
2266 bfd_vma TOCstart;
2267
2268 /* If this is a relocatable link (output_bfd test tells us), just
2269 call the generic function. Any adjustment will be done at final
2270 link time. */
2271 if (output_bfd != NULL)
2272 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2273 input_section, output_bfd, error_message);
2274
2275 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2276 if (TOCstart == 0)
2277 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2278
2279 /* Subtract the TOC base address. */
2280 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2281 return bfd_reloc_continue;
2282 }
2283
2284 static bfd_reloc_status_type
2285 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2286 void *data, asection *input_section,
2287 bfd *output_bfd, char **error_message)
2288 {
2289 bfd_vma TOCstart;
2290
2291 /* If this is a relocatable link (output_bfd test tells us), just
2292 call the generic function. Any adjustment will be done at final
2293 link time. */
2294 if (output_bfd != NULL)
2295 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2296 input_section, output_bfd, error_message);
2297
2298 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2299 if (TOCstart == 0)
2300 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2301
2302 /* Subtract the TOC base address. */
2303 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2304
2305 /* Adjust the addend for sign extension of the low 16 bits. */
2306 reloc_entry->addend += 0x8000;
2307 return bfd_reloc_continue;
2308 }
2309
2310 static bfd_reloc_status_type
2311 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2312 void *data, asection *input_section,
2313 bfd *output_bfd, char **error_message)
2314 {
2315 bfd_vma TOCstart;
2316 bfd_size_type octets;
2317
2318 /* If this is a relocatable link (output_bfd test tells us), just
2319 call the generic function. Any adjustment will be done at final
2320 link time. */
2321 if (output_bfd != NULL)
2322 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2323 input_section, output_bfd, error_message);
2324
2325 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2326 if (TOCstart == 0)
2327 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2328
2329 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2330 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2331 return bfd_reloc_ok;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 /* If this is a relocatable link (output_bfd test tells us), just
2340 call the generic function. Any adjustment will be done at final
2341 link time. */
2342 if (output_bfd != NULL)
2343 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2344 input_section, output_bfd, error_message);
2345
2346 if (error_message != NULL)
2347 {
2348 static char buf[60];
2349 sprintf (buf, "generic linker can't handle %s",
2350 reloc_entry->howto->name);
2351 *error_message = buf;
2352 }
2353 return bfd_reloc_dangerous;
2354 }
2355
2356 struct ppc64_elf_obj_tdata
2357 {
2358 struct elf_obj_tdata elf;
2359
2360 /* Shortcuts to dynamic linker sections. */
2361 asection *got;
2362 asection *relgot;
2363
2364 /* Used during garbage collection. We attach global symbols defined
2365 on removed .opd entries to this section so that the sym is removed. */
2366 asection *deleted_section;
2367
2368 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2369 sections means we potentially need one of these for each input bfd. */
2370 union {
2371 bfd_signed_vma refcount;
2372 bfd_vma offset;
2373 } tlsld_got;
2374 };
2375
2376 #define ppc64_elf_tdata(bfd) \
2377 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2378
2379 #define ppc64_tlsld_got(bfd) \
2380 (&ppc64_elf_tdata (bfd)->tlsld_got)
2381
2382 /* Override the generic function because we store some extras. */
2383
2384 static bfd_boolean
2385 ppc64_elf_mkobject (bfd *abfd)
2386 {
2387 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2388 abfd->tdata.any = bfd_zalloc (abfd, amt);
2389 if (abfd->tdata.any == NULL)
2390 return FALSE;
2391 return TRUE;
2392 }
2393
2394 /* Fix bad default arch selected for a 64 bit input bfd when the
2395 default is 32 bit. */
2396
2397 static bfd_boolean
2398 ppc64_elf_object_p (bfd *abfd)
2399 {
2400 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2401 {
2402 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2403
2404 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2405 {
2406 /* Relies on arch after 32 bit default being 64 bit default. */
2407 abfd->arch_info = abfd->arch_info->next;
2408 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2409 }
2410 }
2411 return TRUE;
2412 }
2413
2414 /* Support for core dump NOTE sections. */
2415
2416 static bfd_boolean
2417 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2418 {
2419 size_t offset, size;
2420
2421 if (note->descsz != 504)
2422 return FALSE;
2423
2424 /* pr_cursig */
2425 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2426
2427 /* pr_pid */
2428 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2429
2430 /* pr_reg */
2431 offset = 112;
2432 size = 384;
2433
2434 /* Make a ".reg/999" section. */
2435 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2436 size, note->descpos + offset);
2437 }
2438
2439 static bfd_boolean
2440 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2441 {
2442 if (note->descsz != 136)
2443 return FALSE;
2444
2445 elf_tdata (abfd)->core_program
2446 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2447 elf_tdata (abfd)->core_command
2448 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2449
2450 return TRUE;
2451 }
2452
2453 /* Merge backend specific data from an object file to the output
2454 object file when linking. */
2455
2456 static bfd_boolean
2457 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2458 {
2459 /* Check if we have the same endianess. */
2460 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2461 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2462 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2463 {
2464 const char *msg;
2465
2466 if (bfd_big_endian (ibfd))
2467 msg = _("%B: compiled for a big endian system "
2468 "and target is little endian");
2469 else
2470 msg = _("%B: compiled for a little endian system "
2471 "and target is big endian");
2472
2473 (*_bfd_error_handler) (msg, ibfd);
2474
2475 bfd_set_error (bfd_error_wrong_format);
2476 return FALSE;
2477 }
2478
2479 return TRUE;
2480 }
2481
2482 /* Add extra PPC sections. */
2483
2484 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2485 {
2486 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2487 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2488 { ".plt", 4, 0, SHT_NOBITS, 0 },
2489 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2490 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2491 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2492 { NULL, 0, 0, 0, 0 }
2493 };
2494
2495 struct _ppc64_elf_section_data
2496 {
2497 struct bfd_elf_section_data elf;
2498
2499 /* An array with one entry for each opd function descriptor. */
2500 union
2501 {
2502 /* Points to the function code section for local opd entries. */
2503 asection **func_sec;
2504 /* After editing .opd, adjust references to opd local syms. */
2505 long *adjust;
2506 } opd;
2507
2508 /* An array for toc sections, indexed by offset/8.
2509 Specifies the relocation symbol index used at a given toc offset. */
2510 unsigned *t_symndx;
2511 };
2512
2513 #define ppc64_elf_section_data(sec) \
2514 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2515
2516 static bfd_boolean
2517 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2518 {
2519 struct _ppc64_elf_section_data *sdata;
2520 bfd_size_type amt = sizeof (*sdata);
2521
2522 sdata = bfd_zalloc (abfd, amt);
2523 if (sdata == NULL)
2524 return FALSE;
2525 sec->used_by_bfd = sdata;
2526
2527 return _bfd_elf_new_section_hook (abfd, sec);
2528 }
2529
2530 static void *
2531 get_opd_info (asection * sec)
2532 {
2533 if (sec != NULL
2534 && ppc64_elf_section_data (sec) != NULL
2535 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2536 return ppc64_elf_section_data (sec)->opd.adjust;
2537 return NULL;
2538 }
2539 \f
2540 /* Parameters for the qsort hook. */
2541 static asection *synthetic_opd;
2542 static bfd_boolean synthetic_relocatable;
2543
2544 /* Helper routine for ppc64_elf_get_synthetic_symtab. */
2545
2546 static int
2547 compare_symbols (const void *ap, const void *bp)
2548 {
2549 const asymbol *a = * (const asymbol **) ap;
2550 const asymbol *b = * (const asymbol **) bp;
2551
2552 if ((a->flags & BSF_SECTION_SYM) == 0 && (b->flags & BSF_SECTION_SYM))
2553 return -1;
2554 if ((a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM) == 0)
2555 return 1;
2556
2557 if (a->section == synthetic_opd && b->section != synthetic_opd)
2558 return -1;
2559 if (a->section != synthetic_opd && b->section == synthetic_opd)
2560 return 1;
2561
2562 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2563 == (SEC_CODE | SEC_ALLOC)
2564 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2565 != (SEC_CODE | SEC_ALLOC))
2566 return -1;
2567
2568 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2569 != (SEC_CODE | SEC_ALLOC)
2570 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2571 == (SEC_CODE | SEC_ALLOC))
2572 return 1;
2573
2574 if (synthetic_relocatable)
2575 {
2576 if (a->section->id < b->section->id)
2577 return -1;
2578
2579 if (a->section->id > b->section->id)
2580 return 1;
2581 }
2582
2583 if (a->value + a->section->vma < b->value + b->section->vma)
2584 return -1;
2585
2586 if (a->value + a->section->vma > b->value + b->section->vma)
2587 return 1;
2588
2589 return 0;
2590 }
2591
2592 /* Helper routine for ppc64_elf_get_synthetic_symtab. */
2593
2594 static int
2595 compare_relocs (const void *ap, const void *bp)
2596 {
2597 const arelent *a = * (const arelent **) ap;
2598 const arelent *b = * (const arelent **) bp;
2599
2600 if (a->address < b->address)
2601 return -1;
2602
2603 if (a->address > b->address)
2604 return 1;
2605
2606 return 0;
2607 }
2608
2609 /* Create synthetic symbols. */
2610
2611 static long
2612 ppc64_elf_get_synthetic_symtab (bfd *abfd, asymbol **relsyms, asymbol **ret)
2613 {
2614 asymbol *s;
2615 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2616 arelent **relocs, **r;
2617 long count, i;
2618 size_t size;
2619 char *names;
2620 asymbol **syms = NULL;
2621 long symcount = 0, opdsymcount, relcount;
2622 asection *relopd, *opd;
2623 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2624
2625 *ret = NULL;
2626
2627 opd = bfd_get_section_by_name (abfd, ".opd");
2628 if (opd == NULL)
2629 return 0;
2630
2631 if ((bfd_get_file_flags (abfd) & HAS_SYMS))
2632 {
2633 long storage;
2634 storage = bfd_get_symtab_upper_bound (abfd);
2635 if (storage < 0)
2636 return 0;
2637
2638 if (storage)
2639 {
2640 syms = bfd_malloc (storage);
2641 if (syms == NULL)
2642 return 0;
2643 }
2644
2645 symcount = bfd_canonicalize_symtab (abfd, syms);
2646 if (symcount < 0)
2647 {
2648 free (syms);
2649 return 0;
2650 }
2651
2652 if (symcount == 0)
2653 {
2654 free (syms);
2655 syms = NULL;
2656 }
2657 }
2658
2659 if (symcount == 0)
2660 {
2661 long storage;
2662
2663 storage = bfd_get_dynamic_symtab_upper_bound (abfd);
2664 if (storage < 0)
2665 return 0;
2666
2667 if (storage)
2668 {
2669 syms = bfd_malloc (storage);
2670 if (syms == NULL)
2671 return 0;
2672 }
2673
2674 symcount = bfd_canonicalize_dynamic_symtab (abfd, syms);
2675 if (symcount < 0)
2676 {
2677 free (syms);
2678 return 0;
2679 }
2680 }
2681
2682 synthetic_opd = opd;
2683 synthetic_relocatable = relocatable;
2684 qsort (syms, symcount, sizeof (asymbol *), compare_symbols);
2685
2686 opdsymcount = symcount;
2687 for (i = 0; i < symcount; ++i)
2688 {
2689 if (syms[i]->flags & BSF_SECTION_SYM)
2690 {
2691 if (opdsymcount == symcount)
2692 opdsymcount = i;
2693 symcount = i;
2694 break;
2695 }
2696
2697 if (syms[i]->section == opd)
2698 continue;
2699
2700 if (opdsymcount == symcount)
2701 opdsymcount = i;
2702
2703 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2704 != (SEC_CODE | SEC_ALLOC))
2705 {
2706 symcount = i;
2707 break;
2708 }
2709 }
2710
2711 if (opdsymcount == 0)
2712 {
2713 free (syms);
2714 return 0;
2715 }
2716
2717 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2718 if (! relocatable)
2719 {
2720 relopd = bfd_get_section_by_name (abfd, ".rela.opd");
2721 if (relopd == NULL)
2722 {
2723 relopd = bfd_get_section_by_name (abfd, ".rela.dyn");
2724 if (relopd == NULL)
2725 {
2726 free (syms);
2727 return 0;
2728 }
2729 }
2730 relcount = relopd->size / 24;
2731
2732 if (! relcount
2733 || ! (*slurp_relocs) (abfd, relopd, relsyms, TRUE))
2734 {
2735 free (syms);
2736 return 0;
2737 }
2738 }
2739 else
2740 {
2741 relopd = opd;
2742 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2743
2744 if (! relcount
2745 || ! (*slurp_relocs) (abfd, relopd, relsyms, FALSE))
2746 {
2747 free (syms);
2748 return 0;
2749 }
2750 }
2751
2752 relocs = bfd_malloc (relcount * sizeof (arelent **));
2753 if (relocs == NULL)
2754 {
2755 free (syms);
2756 return 0;
2757 }
2758
2759 for (i = 0; i < relcount; ++i)
2760 relocs[i] = &relopd->relocation[i];
2761
2762 qsort (relocs, relcount, sizeof (*relocs), compare_relocs);
2763
2764 size = 0;
2765 count = 0;
2766 for (i = 0, r = relocs; i < opdsymcount; ++i)
2767 {
2768 long lo, hi, mid;
2769 asymbol *sym;
2770
2771 while (r < relocs + relcount
2772 && (*r)->address < syms[i]->value + opd->vma)
2773 ++r;
2774
2775 if (r == relocs + relcount)
2776 continue;
2777
2778 if ((*r)->address != syms[i]->value + opd->vma)
2779 continue;
2780
2781 if ((*r)->howto->type != (relocatable
2782 ? R_PPC64_ADDR64 : R_PPC64_RELATIVE))
2783 continue;
2784
2785 lo = opdsymcount;
2786 hi = symcount;
2787 sym = *((*r)->sym_ptr_ptr);
2788 if (relocatable)
2789 while (lo < hi)
2790 {
2791 mid = (lo + hi) >> 1;
2792 if (syms[mid]->section->id < sym->section->id)
2793 lo = mid + 1;
2794 else if (syms[mid]->section->id > sym->section->id)
2795 hi = mid;
2796 else if (syms[mid]->value < sym->value + (*r)->addend)
2797 lo = mid + 1;
2798 else if (syms[mid]->value > sym->value + (*r)->addend)
2799 hi = mid;
2800 else
2801 break;
2802 }
2803 else
2804 while (lo < hi)
2805 {
2806 mid = (lo + hi) >> 1;
2807 if (syms[mid]->value + syms[mid]->section->vma < (*r)->addend)
2808 lo = mid + 1;
2809 else if (syms[mid]->value + syms[mid]->section->vma > (*r)->addend)
2810 hi = mid;
2811 else
2812 break;
2813 }
2814
2815 if (lo >= hi)
2816 {
2817 ++count;
2818 size += sizeof (asymbol);
2819 size += strlen (syms[i]->name) + 1;
2820 }
2821 }
2822
2823 s = *ret = bfd_malloc (size);
2824 if (s == NULL)
2825 {
2826 free (syms);
2827 free (relocs);
2828 return 0;
2829 }
2830
2831 names = (char *) (s + count);
2832
2833 for (i = 0, r = relocs; i < opdsymcount; ++i)
2834 {
2835 long lo, hi, mid;
2836 asymbol *sym;
2837
2838 while (r < relocs + relcount
2839 && (*r)->address < syms[i]->value + opd->vma)
2840 ++r;
2841
2842 if (r == relocs + relcount)
2843 continue;
2844
2845 if ((*r)->address != syms[i]->value + opd->vma)
2846 continue;
2847
2848 if ((*r)->howto->type != (relocatable
2849 ? R_PPC64_ADDR64 : R_PPC64_RELATIVE))
2850 continue;
2851
2852 lo = opdsymcount;
2853 hi = symcount;
2854 sym = *((*r)->sym_ptr_ptr);
2855 if (relocatable)
2856 while (lo < hi)
2857 {
2858 mid = (lo + hi) >> 1;
2859 if (syms[mid]->section->id < sym->section->id)
2860 lo = mid + 1;
2861 else if (syms[mid]->section->id > sym->section->id)
2862 hi = mid;
2863 else if (syms[mid]->value < sym->value + (*r)->addend)
2864 lo = mid + 1;
2865 else if (syms[mid]->value > sym->value + (*r)->addend)
2866 hi = mid;
2867 else
2868 break;
2869 }
2870 else
2871 while (lo < hi)
2872 {
2873 mid = (lo + hi) >> 1;
2874 if (syms[mid]->value + syms[mid]->section->vma < (*r)->addend)
2875 lo = mid + 1;
2876 else if (syms[mid]->value + syms[mid]->section->vma > (*r)->addend)
2877 hi = mid;
2878 else
2879 break;
2880 }
2881
2882 if (lo >= hi)
2883 {
2884 size_t len;
2885
2886 *s = *syms[i];
2887
2888 if (! relocatable)
2889 {
2890 asection *sec;
2891
2892 s->section = &bfd_abs_section;
2893 for (sec = abfd->sections; sec; sec = sec->next)
2894 if ((sec->flags & (SEC_ALLOC | SEC_CODE))
2895 == (SEC_ALLOC | SEC_CODE)
2896 && (*r)->addend >= sec->vma
2897 && (*r)->addend < sec->vma + sec->size)
2898 {
2899 s->section = sec;
2900 break;
2901 }
2902 s->value = (*r)->addend - sec->vma;
2903 }
2904 else
2905 {
2906 s->section = sym->section;
2907 s->value = sym->value + (*r)->addend;
2908 }
2909 s->name = names;
2910 len = strlen (syms[i]->name);
2911 memcpy (names, syms[i]->name, len + 1);
2912 names += len + 1;
2913 s++;
2914 }
2915 }
2916
2917 free (syms);
2918 free (relocs);
2919 return count;
2920 }
2921
2922 \f
2923 /* The following functions are specific to the ELF linker, while
2924 functions above are used generally. Those named ppc64_elf_* are
2925 called by the main ELF linker code. They appear in this file more
2926 or less in the order in which they are called. eg.
2927 ppc64_elf_check_relocs is called early in the link process,
2928 ppc64_elf_finish_dynamic_sections is one of the last functions
2929 called.
2930
2931 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2932 functions have both a function code symbol and a function descriptor
2933 symbol. A call to foo in a relocatable object file looks like:
2934
2935 . .text
2936 . x:
2937 . bl .foo
2938 . nop
2939
2940 The function definition in another object file might be:
2941
2942 . .section .opd
2943 . foo: .quad .foo
2944 . .quad .TOC.@tocbase
2945 . .quad 0
2946 .
2947 . .text
2948 . .foo: blr
2949
2950 When the linker resolves the call during a static link, the branch
2951 unsurprisingly just goes to .foo and the .opd information is unused.
2952 If the function definition is in a shared library, things are a little
2953 different: The call goes via a plt call stub, the opd information gets
2954 copied to the plt, and the linker patches the nop.
2955
2956 . x:
2957 . bl .foo_stub
2958 . ld 2,40(1)
2959 .
2960 .
2961 . .foo_stub:
2962 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2963 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2964 . std 2,40(1) # this is the general idea
2965 . ld 11,0(12)
2966 . ld 2,8(12)
2967 . mtctr 11
2968 . ld 11,16(12)
2969 . bctr
2970 .
2971 . .section .plt
2972 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2973
2974 The "reloc ()" notation is supposed to indicate that the linker emits
2975 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2976 copying.
2977
2978 What are the difficulties here? Well, firstly, the relocations
2979 examined by the linker in check_relocs are against the function code
2980 sym .foo, while the dynamic relocation in the plt is emitted against
2981 the function descriptor symbol, foo. Somewhere along the line, we need
2982 to carefully copy dynamic link information from one symbol to the other.
2983 Secondly, the generic part of the elf linker will make .foo a dynamic
2984 symbol as is normal for most other backends. We need foo dynamic
2985 instead, at least for an application final link. However, when
2986 creating a shared library containing foo, we need to have both symbols
2987 dynamic so that references to .foo are satisfied during the early
2988 stages of linking. Otherwise the linker might decide to pull in a
2989 definition from some other object, eg. a static library.
2990
2991 Update: As of August 2004, we support a new convention. Function
2992 calls may use the function descriptor symbol, ie. "bl foo". This
2993 behaves exactly as "bl .foo". */
2994
2995 /* The linker needs to keep track of the number of relocs that it
2996 decides to copy as dynamic relocs in check_relocs for each symbol.
2997 This is so that it can later discard them if they are found to be
2998 unnecessary. We store the information in a field extending the
2999 regular ELF linker hash table. */
3000
3001 struct ppc_dyn_relocs
3002 {
3003 struct ppc_dyn_relocs *next;
3004
3005 /* The input section of the reloc. */
3006 asection *sec;
3007
3008 /* Total number of relocs copied for the input section. */
3009 bfd_size_type count;
3010
3011 /* Number of pc-relative relocs copied for the input section. */
3012 bfd_size_type pc_count;
3013 };
3014
3015 /* Track GOT entries needed for a given symbol. We might need more
3016 than one got entry per symbol. */
3017 struct got_entry
3018 {
3019 struct got_entry *next;
3020
3021 /* The symbol addend that we'll be placing in the GOT. */
3022 bfd_vma addend;
3023
3024 /* Unlike other ELF targets, we use separate GOT entries for the same
3025 symbol referenced from different input files. This is to support
3026 automatic multiple TOC/GOT sections, where the TOC base can vary
3027 from one input file to another.
3028
3029 Point to the BFD owning this GOT entry. */
3030 bfd *owner;
3031
3032 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3033 TLS_TPREL or TLS_DTPREL for tls entries. */
3034 char tls_type;
3035
3036 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3037 union
3038 {
3039 bfd_signed_vma refcount;
3040 bfd_vma offset;
3041 } got;
3042 };
3043
3044 /* The same for PLT. */
3045 struct plt_entry
3046 {
3047 struct plt_entry *next;
3048
3049 bfd_vma addend;
3050
3051 union
3052 {
3053 bfd_signed_vma refcount;
3054 bfd_vma offset;
3055 } plt;
3056 };
3057
3058 /* Of those relocs that might be copied as dynamic relocs, this macro
3059 selects those that must be copied when linking a shared library,
3060 even when the symbol is local. */
3061
3062 #define MUST_BE_DYN_RELOC(RTYPE) \
3063 ((RTYPE) != R_PPC64_REL32 \
3064 && (RTYPE) != R_PPC64_REL64 \
3065 && (RTYPE) != R_PPC64_REL30)
3066
3067 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3068 copying dynamic variables from a shared lib into an app's dynbss
3069 section, and instead use a dynamic relocation to point into the
3070 shared lib. With code that gcc generates, it's vital that this be
3071 enabled; In the PowerPC64 ABI, the address of a function is actually
3072 the address of a function descriptor, which resides in the .opd
3073 section. gcc uses the descriptor directly rather than going via the
3074 GOT as some other ABI's do, which means that initialized function
3075 pointers must reference the descriptor. Thus, a function pointer
3076 initialized to the address of a function in a shared library will
3077 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3078 redefines the function descriptor symbol to point to the copy. This
3079 presents a problem as a plt entry for that function is also
3080 initialized from the function descriptor symbol and the copy reloc
3081 may not be initialized first. */
3082 #define ELIMINATE_COPY_RELOCS 1
3083
3084 /* Section name for stubs is the associated section name plus this
3085 string. */
3086 #define STUB_SUFFIX ".stub"
3087
3088 /* Linker stubs.
3089 ppc_stub_long_branch:
3090 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3091 destination, but a 24 bit branch in a stub section will reach.
3092 . b dest
3093
3094 ppc_stub_plt_branch:
3095 Similar to the above, but a 24 bit branch in the stub section won't
3096 reach its destination.
3097 . addis %r12,%r2,xxx@toc@ha
3098 . ld %r11,xxx@toc@l(%r12)
3099 . mtctr %r11
3100 . bctr
3101
3102 ppc_stub_plt_call:
3103 Used to call a function in a shared library. If it so happens that
3104 the plt entry referenced crosses a 64k boundary, then an extra
3105 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
3106 xxx+16 as appropriate.
3107 . addis %r12,%r2,xxx@toc@ha
3108 . std %r2,40(%r1)
3109 . ld %r11,xxx+0@toc@l(%r12)
3110 . ld %r2,xxx+8@toc@l(%r12)
3111 . mtctr %r11
3112 . ld %r11,xxx+16@toc@l(%r12)
3113 . bctr
3114
3115 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3116 code to adjust the value and save r2 to support multiple toc sections.
3117 A ppc_stub_long_branch with an r2 offset looks like:
3118 . std %r2,40(%r1)
3119 . addis %r2,%r2,off@ha
3120 . addi %r2,%r2,off@l
3121 . b dest
3122
3123 A ppc_stub_plt_branch with an r2 offset looks like:
3124 . std %r2,40(%r1)
3125 . addis %r12,%r2,xxx@toc@ha
3126 . ld %r11,xxx@toc@l(%r12)
3127 . addis %r2,%r2,off@ha
3128 . addi %r2,%r2,off@l
3129 . mtctr %r11
3130 . bctr
3131 */
3132
3133 enum ppc_stub_type {
3134 ppc_stub_none,
3135 ppc_stub_long_branch,
3136 ppc_stub_long_branch_r2off,
3137 ppc_stub_plt_branch,
3138 ppc_stub_plt_branch_r2off,
3139 ppc_stub_plt_call
3140 };
3141
3142 struct ppc_stub_hash_entry {
3143
3144 /* Base hash table entry structure. */
3145 struct bfd_hash_entry root;
3146
3147 enum ppc_stub_type stub_type;
3148
3149 /* The stub section. */
3150 asection *stub_sec;
3151
3152 /* Offset within stub_sec of the beginning of this stub. */
3153 bfd_vma stub_offset;
3154
3155 /* Given the symbol's value and its section we can determine its final
3156 value when building the stubs (so the stub knows where to jump. */
3157 bfd_vma target_value;
3158 asection *target_section;
3159
3160 /* The symbol table entry, if any, that this was derived from. */
3161 struct ppc_link_hash_entry *h;
3162
3163 /* And the reloc addend that this was derived from. */
3164 bfd_vma addend;
3165
3166 /* Where this stub is being called from, or, in the case of combined
3167 stub sections, the first input section in the group. */
3168 asection *id_sec;
3169 };
3170
3171 struct ppc_branch_hash_entry {
3172
3173 /* Base hash table entry structure. */
3174 struct bfd_hash_entry root;
3175
3176 /* Offset within .branch_lt. */
3177 unsigned int offset;
3178
3179 /* Generation marker. */
3180 unsigned int iter;
3181 };
3182
3183 struct ppc_link_hash_entry
3184 {
3185 struct elf_link_hash_entry elf;
3186
3187 /* A pointer to the most recently used stub hash entry against this
3188 symbol. */
3189 struct ppc_stub_hash_entry *stub_cache;
3190
3191 /* Track dynamic relocs copied for this symbol. */
3192 struct ppc_dyn_relocs *dyn_relocs;
3193
3194 /* Link between function code and descriptor symbols. */
3195 struct ppc_link_hash_entry *oh;
3196
3197 /* Flag function code and descriptor symbols. */
3198 unsigned int is_func:1;
3199 unsigned int is_func_descriptor:1;
3200
3201 /* Whether global opd sym has been adjusted or not.
3202 After ppc64_elf_edit_opd has run, this flag should be set for all
3203 globals defined in any opd section. */
3204 unsigned int adjust_done:1;
3205
3206 /* Set if we twiddled this symbol to weak at some stage. */
3207 unsigned int was_undefined:1;
3208
3209 /* Contexts in which symbol is used in the GOT (or TOC).
3210 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3211 corresponding relocs are encountered during check_relocs.
3212 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3213 indicate the corresponding GOT entry type is not needed.
3214 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3215 a TPREL one. We use a separate flag rather than setting TPREL
3216 just for convenience in distinguishing the two cases. */
3217 #define TLS_GD 1 /* GD reloc. */
3218 #define TLS_LD 2 /* LD reloc. */
3219 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3220 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3221 #define TLS_TLS 16 /* Any TLS reloc. */
3222 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3223 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3224 char tls_mask;
3225 };
3226
3227 /* ppc64 ELF linker hash table. */
3228
3229 struct ppc_link_hash_table
3230 {
3231 struct elf_link_hash_table elf;
3232
3233 /* The stub hash table. */
3234 struct bfd_hash_table stub_hash_table;
3235
3236 /* Another hash table for plt_branch stubs. */
3237 struct bfd_hash_table branch_hash_table;
3238
3239 /* Linker stub bfd. */
3240 bfd *stub_bfd;
3241
3242 /* Linker call-backs. */
3243 asection * (*add_stub_section) (const char *, asection *);
3244 void (*layout_sections_again) (void);
3245
3246 /* Array to keep track of which stub sections have been created, and
3247 information on stub grouping. */
3248 struct map_stub {
3249 /* This is the section to which stubs in the group will be attached. */
3250 asection *link_sec;
3251 /* The stub section. */
3252 asection *stub_sec;
3253 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3254 bfd_vma toc_off;
3255 } *stub_group;
3256
3257 /* Temp used when calculating TOC pointers. */
3258 bfd_vma toc_curr;
3259
3260 /* Highest input section id. */
3261 int top_id;
3262
3263 /* Highest output section index. */
3264 int top_index;
3265
3266 /* List of input sections for each output section. */
3267 asection **input_list;
3268
3269 /* Short-cuts to get to dynamic linker sections. */
3270 asection *got;
3271 asection *plt;
3272 asection *relplt;
3273 asection *dynbss;
3274 asection *relbss;
3275 asection *glink;
3276 asection *sfpr;
3277 asection *brlt;
3278 asection *relbrlt;
3279
3280 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3281 struct ppc_link_hash_entry *tls_get_addr;
3282 struct ppc_link_hash_entry *tls_get_addr_fd;
3283
3284 /* Statistics. */
3285 unsigned long stub_count[ppc_stub_plt_call];
3286
3287 /* Set if we should emit symbols for stubs. */
3288 unsigned int emit_stub_syms:1;
3289
3290 /* Set on error. */
3291 unsigned int stub_error:1;
3292
3293 /* Flag set when small branches are detected. Used to
3294 select suitable defaults for the stub group size. */
3295 unsigned int has_14bit_branch:1;
3296
3297 /* Temp used by ppc64_elf_check_directives. */
3298 unsigned int twiddled_syms:1;
3299
3300 /* Incremented every time we size stubs. */
3301 unsigned int stub_iteration;
3302
3303 /* Small local sym to section mapping cache. */
3304 struct sym_sec_cache sym_sec;
3305 };
3306
3307 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3308
3309 #define ppc_hash_table(p) \
3310 ((struct ppc_link_hash_table *) ((p)->hash))
3311
3312 #define ppc_stub_hash_lookup(table, string, create, copy) \
3313 ((struct ppc_stub_hash_entry *) \
3314 bfd_hash_lookup ((table), (string), (create), (copy)))
3315
3316 #define ppc_branch_hash_lookup(table, string, create, copy) \
3317 ((struct ppc_branch_hash_entry *) \
3318 bfd_hash_lookup ((table), (string), (create), (copy)))
3319
3320 /* Create an entry in the stub hash table. */
3321
3322 static struct bfd_hash_entry *
3323 stub_hash_newfunc (struct bfd_hash_entry *entry,
3324 struct bfd_hash_table *table,
3325 const char *string)
3326 {
3327 /* Allocate the structure if it has not already been allocated by a
3328 subclass. */
3329 if (entry == NULL)
3330 {
3331 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3332 if (entry == NULL)
3333 return entry;
3334 }
3335
3336 /* Call the allocation method of the superclass. */
3337 entry = bfd_hash_newfunc (entry, table, string);
3338 if (entry != NULL)
3339 {
3340 struct ppc_stub_hash_entry *eh;
3341
3342 /* Initialize the local fields. */
3343 eh = (struct ppc_stub_hash_entry *) entry;
3344 eh->stub_type = ppc_stub_none;
3345 eh->stub_sec = NULL;
3346 eh->stub_offset = 0;
3347 eh->target_value = 0;
3348 eh->target_section = NULL;
3349 eh->h = NULL;
3350 eh->id_sec = NULL;
3351 }
3352
3353 return entry;
3354 }
3355
3356 /* Create an entry in the branch hash table. */
3357
3358 static struct bfd_hash_entry *
3359 branch_hash_newfunc (struct bfd_hash_entry *entry,
3360 struct bfd_hash_table *table,
3361 const char *string)
3362 {
3363 /* Allocate the structure if it has not already been allocated by a
3364 subclass. */
3365 if (entry == NULL)
3366 {
3367 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3368 if (entry == NULL)
3369 return entry;
3370 }
3371
3372 /* Call the allocation method of the superclass. */
3373 entry = bfd_hash_newfunc (entry, table, string);
3374 if (entry != NULL)
3375 {
3376 struct ppc_branch_hash_entry *eh;
3377
3378 /* Initialize the local fields. */
3379 eh = (struct ppc_branch_hash_entry *) entry;
3380 eh->offset = 0;
3381 eh->iter = 0;
3382 }
3383
3384 return entry;
3385 }
3386
3387 /* Create an entry in a ppc64 ELF linker hash table. */
3388
3389 static struct bfd_hash_entry *
3390 link_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_link_hash_entry));
3399 if (entry == NULL)
3400 return entry;
3401 }
3402
3403 /* Call the allocation method of the superclass. */
3404 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3405 if (entry != NULL)
3406 {
3407 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3408
3409 eh->stub_cache = NULL;
3410 eh->dyn_relocs = NULL;
3411 eh->oh = NULL;
3412 eh->is_func = 0;
3413 eh->is_func_descriptor = 0;
3414 eh->adjust_done = 0;
3415 eh->was_undefined = 0;
3416 eh->tls_mask = 0;
3417 }
3418
3419 return entry;
3420 }
3421
3422 /* Create a ppc64 ELF linker hash table. */
3423
3424 static struct bfd_link_hash_table *
3425 ppc64_elf_link_hash_table_create (bfd *abfd)
3426 {
3427 struct ppc_link_hash_table *htab;
3428 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3429
3430 htab = bfd_zmalloc (amt);
3431 if (htab == NULL)
3432 return NULL;
3433
3434 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3435 {
3436 free (htab);
3437 return NULL;
3438 }
3439
3440 /* Init the stub hash table too. */
3441 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3442 return NULL;
3443
3444 /* And the branch hash table. */
3445 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3446 return NULL;
3447
3448 /* Initializing two fields of the union is just cosmetic. We really
3449 only care about glist, but when compiled on a 32-bit host the
3450 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3451 debugger inspection of these fields look nicer. */
3452 htab->elf.init_refcount.refcount = 0;
3453 htab->elf.init_refcount.glist = NULL;
3454 htab->elf.init_offset.offset = 0;
3455 htab->elf.init_offset.glist = NULL;
3456
3457 return &htab->elf.root;
3458 }
3459
3460 /* Free the derived linker hash table. */
3461
3462 static void
3463 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3464 {
3465 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3466
3467 bfd_hash_table_free (&ret->stub_hash_table);
3468 bfd_hash_table_free (&ret->branch_hash_table);
3469 _bfd_generic_link_hash_table_free (hash);
3470 }
3471
3472 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3473
3474 void
3475 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3476 {
3477 struct ppc_link_hash_table *htab;
3478
3479 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3480
3481 /* Always hook our dynamic sections into the first bfd, which is the
3482 linker created stub bfd. This ensures that the GOT header is at
3483 the start of the output TOC section. */
3484 htab = ppc_hash_table (info);
3485 htab->stub_bfd = abfd;
3486 htab->elf.dynobj = abfd;
3487 }
3488
3489 /* Build a name for an entry in the stub hash table. */
3490
3491 static char *
3492 ppc_stub_name (const asection *input_section,
3493 const asection *sym_sec,
3494 const struct ppc_link_hash_entry *h,
3495 const Elf_Internal_Rela *rel)
3496 {
3497 char *stub_name;
3498 bfd_size_type len;
3499
3500 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3501 offsets from a sym as a branch target? In fact, we could
3502 probably assume the addend is always zero. */
3503 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3504
3505 if (h)
3506 {
3507 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3508 stub_name = bfd_malloc (len);
3509 if (stub_name != NULL)
3510 {
3511 sprintf (stub_name, "%08x.%s+%x",
3512 input_section->id & 0xffffffff,
3513 h->elf.root.root.string,
3514 (int) rel->r_addend & 0xffffffff);
3515 }
3516 }
3517 else
3518 {
3519 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3520 stub_name = bfd_malloc (len);
3521 if (stub_name != NULL)
3522 {
3523 sprintf (stub_name, "%08x.%x:%x+%x",
3524 input_section->id & 0xffffffff,
3525 sym_sec->id & 0xffffffff,
3526 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3527 (int) rel->r_addend & 0xffffffff);
3528 }
3529 }
3530 return stub_name;
3531 }
3532
3533 /* Look up an entry in the stub hash. Stub entries are cached because
3534 creating the stub name takes a bit of time. */
3535
3536 static struct ppc_stub_hash_entry *
3537 ppc_get_stub_entry (const asection *input_section,
3538 const asection *sym_sec,
3539 struct elf_link_hash_entry *hash,
3540 const Elf_Internal_Rela *rel,
3541 struct ppc_link_hash_table *htab)
3542 {
3543 struct ppc_stub_hash_entry *stub_entry;
3544 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3545 const asection *id_sec;
3546
3547 /* If this input section is part of a group of sections sharing one
3548 stub section, then use the id of the first section in the group.
3549 Stub names need to include a section id, as there may well be
3550 more than one stub used to reach say, printf, and we need to
3551 distinguish between them. */
3552 id_sec = htab->stub_group[input_section->id].link_sec;
3553
3554 if (h != NULL && h->stub_cache != NULL
3555 && h->stub_cache->h == h
3556 && h->stub_cache->id_sec == id_sec)
3557 {
3558 stub_entry = h->stub_cache;
3559 }
3560 else
3561 {
3562 char *stub_name;
3563
3564 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3565 if (stub_name == NULL)
3566 return NULL;
3567
3568 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3569 stub_name, FALSE, FALSE);
3570 if (h != NULL)
3571 h->stub_cache = stub_entry;
3572
3573 free (stub_name);
3574 }
3575
3576 return stub_entry;
3577 }
3578
3579 /* Add a new stub entry to the stub hash. Not all fields of the new
3580 stub entry are initialised. */
3581
3582 static struct ppc_stub_hash_entry *
3583 ppc_add_stub (const char *stub_name,
3584 asection *section,
3585 struct ppc_link_hash_table *htab)
3586 {
3587 asection *link_sec;
3588 asection *stub_sec;
3589 struct ppc_stub_hash_entry *stub_entry;
3590
3591 link_sec = htab->stub_group[section->id].link_sec;
3592 stub_sec = htab->stub_group[section->id].stub_sec;
3593 if (stub_sec == NULL)
3594 {
3595 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3596 if (stub_sec == NULL)
3597 {
3598 size_t namelen;
3599 bfd_size_type len;
3600 char *s_name;
3601
3602 namelen = strlen (link_sec->name);
3603 len = namelen + sizeof (STUB_SUFFIX);
3604 s_name = bfd_alloc (htab->stub_bfd, len);
3605 if (s_name == NULL)
3606 return NULL;
3607
3608 memcpy (s_name, link_sec->name, namelen);
3609 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3610 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3611 if (stub_sec == NULL)
3612 return NULL;
3613 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3614 }
3615 htab->stub_group[section->id].stub_sec = stub_sec;
3616 }
3617
3618 /* Enter this entry into the linker stub hash table. */
3619 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3620 TRUE, FALSE);
3621 if (stub_entry == NULL)
3622 {
3623 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3624 section->owner, stub_name);
3625 return NULL;
3626 }
3627
3628 stub_entry->stub_sec = stub_sec;
3629 stub_entry->stub_offset = 0;
3630 stub_entry->id_sec = link_sec;
3631 return stub_entry;
3632 }
3633
3634 /* Create sections for linker generated code. */
3635
3636 static bfd_boolean
3637 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3638 {
3639 struct ppc_link_hash_table *htab;
3640 flagword flags;
3641
3642 htab = ppc_hash_table (info);
3643
3644 /* Create .sfpr for code to save and restore fp regs. */
3645 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3646 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3647 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3648 if (htab->sfpr == NULL
3649 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3650 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3651 return FALSE;
3652
3653 /* Create .glink for lazy dynamic linking support. */
3654 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3655 if (htab->glink == NULL
3656 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3657 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3658 return FALSE;
3659
3660 /* Create .branch_lt for plt_branch stubs. */
3661 flags = (SEC_ALLOC | SEC_LOAD
3662 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3663 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3664 if (htab->brlt == NULL
3665 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3666 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3667 return FALSE;
3668
3669 if (info->shared)
3670 {
3671 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3672 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3673 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3674 if (!htab->relbrlt
3675 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3676 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3677 return FALSE;
3678 }
3679 return TRUE;
3680 }
3681
3682 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3683 not already done. */
3684
3685 static bfd_boolean
3686 create_got_section (bfd *abfd, struct bfd_link_info *info)
3687 {
3688 asection *got, *relgot;
3689 flagword flags;
3690 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3691
3692 if (!htab->got)
3693 {
3694 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3695 return FALSE;
3696
3697 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3698 if (!htab->got)
3699 abort ();
3700 }
3701
3702 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3703 | SEC_LINKER_CREATED);
3704
3705 got = bfd_make_section (abfd, ".got");
3706 if (!got
3707 || !bfd_set_section_flags (abfd, got, flags)
3708 || !bfd_set_section_alignment (abfd, got, 3))
3709 return FALSE;
3710
3711 relgot = bfd_make_section (abfd, ".rela.got");
3712 if (!relgot
3713 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3714 || ! bfd_set_section_alignment (abfd, relgot, 3))
3715 return FALSE;
3716
3717 ppc64_elf_tdata (abfd)->got = got;
3718 ppc64_elf_tdata (abfd)->relgot = relgot;
3719 return TRUE;
3720 }
3721
3722 /* Create the dynamic sections, and set up shortcuts. */
3723
3724 static bfd_boolean
3725 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3726 {
3727 struct ppc_link_hash_table *htab;
3728
3729 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3730 return FALSE;
3731
3732 htab = ppc_hash_table (info);
3733 if (!htab->got)
3734 htab->got = bfd_get_section_by_name (dynobj, ".got");
3735 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3736 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3737 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3738 if (!info->shared)
3739 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3740
3741 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3742 || (!info->shared && !htab->relbss))
3743 abort ();
3744
3745 return TRUE;
3746 }
3747
3748 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3749
3750 static void
3751 ppc64_elf_copy_indirect_symbol
3752 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3753 struct elf_link_hash_entry *dir,
3754 struct elf_link_hash_entry *ind)
3755 {
3756 struct ppc_link_hash_entry *edir, *eind;
3757 flagword mask;
3758
3759 edir = (struct ppc_link_hash_entry *) dir;
3760 eind = (struct ppc_link_hash_entry *) ind;
3761
3762 /* Copy over any dynamic relocs we may have on the indirect sym. */
3763 if (eind->dyn_relocs != NULL)
3764 {
3765 if (edir->dyn_relocs != NULL)
3766 {
3767 struct ppc_dyn_relocs **pp;
3768 struct ppc_dyn_relocs *p;
3769
3770 if (eind->elf.root.type == bfd_link_hash_indirect)
3771 abort ();
3772
3773 /* Add reloc counts against the weak sym to the strong sym
3774 list. Merge any entries against the same section. */
3775 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3776 {
3777 struct ppc_dyn_relocs *q;
3778
3779 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3780 if (q->sec == p->sec)
3781 {
3782 q->pc_count += p->pc_count;
3783 q->count += p->count;
3784 *pp = p->next;
3785 break;
3786 }
3787 if (q == NULL)
3788 pp = &p->next;
3789 }
3790 *pp = edir->dyn_relocs;
3791 }
3792
3793 edir->dyn_relocs = eind->dyn_relocs;
3794 eind->dyn_relocs = NULL;
3795 }
3796
3797 edir->is_func |= eind->is_func;
3798 edir->is_func_descriptor |= eind->is_func_descriptor;
3799 edir->tls_mask |= eind->tls_mask;
3800
3801 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3802 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3803 | ELF_LINK_HASH_NEEDS_PLT);
3804 /* If called to transfer flags for a weakdef during processing
3805 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3806 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3807 if (ELIMINATE_COPY_RELOCS
3808 && eind->elf.root.type != bfd_link_hash_indirect
3809 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3810 mask &= ~ELF_LINK_NON_GOT_REF;
3811
3812 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3813
3814 /* If we were called to copy over info for a weak sym, that's all. */
3815 if (eind->elf.root.type != bfd_link_hash_indirect)
3816 return;
3817
3818 /* Copy over got entries that we may have already seen to the
3819 symbol which just became indirect. */
3820 if (eind->elf.got.glist != NULL)
3821 {
3822 if (edir->elf.got.glist != NULL)
3823 {
3824 struct got_entry **entp;
3825 struct got_entry *ent;
3826
3827 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3828 {
3829 struct got_entry *dent;
3830
3831 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3832 if (dent->addend == ent->addend
3833 && dent->owner == ent->owner
3834 && dent->tls_type == ent->tls_type)
3835 {
3836 dent->got.refcount += ent->got.refcount;
3837 *entp = ent->next;
3838 break;
3839 }
3840 if (dent == NULL)
3841 entp = &ent->next;
3842 }
3843 *entp = edir->elf.got.glist;
3844 }
3845
3846 edir->elf.got.glist = eind->elf.got.glist;
3847 eind->elf.got.glist = NULL;
3848 }
3849
3850 /* And plt entries. */
3851 if (eind->elf.plt.plist != NULL)
3852 {
3853 if (edir->elf.plt.plist != NULL)
3854 {
3855 struct plt_entry **entp;
3856 struct plt_entry *ent;
3857
3858 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3859 {
3860 struct plt_entry *dent;
3861
3862 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3863 if (dent->addend == ent->addend)
3864 {
3865 dent->plt.refcount += ent->plt.refcount;
3866 *entp = ent->next;
3867 break;
3868 }
3869 if (dent == NULL)
3870 entp = &ent->next;
3871 }
3872 *entp = edir->elf.plt.plist;
3873 }
3874
3875 edir->elf.plt.plist = eind->elf.plt.plist;
3876 eind->elf.plt.plist = NULL;
3877 }
3878
3879 if (edir->elf.dynindx == -1)
3880 {
3881 edir->elf.dynindx = eind->elf.dynindx;
3882 edir->elf.dynstr_index = eind->elf.dynstr_index;
3883 eind->elf.dynindx = -1;
3884 eind->elf.dynstr_index = 0;
3885 }
3886 else
3887 BFD_ASSERT (eind->elf.dynindx == -1);
3888 }
3889
3890 /* Find the function descriptor hash entry from the given function code
3891 hash entry FH. Link the entries via their OH fields. */
3892
3893 static struct ppc_link_hash_entry *
3894 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3895 {
3896 struct ppc_link_hash_entry *fdh = fh->oh;
3897
3898 if (fdh == NULL)
3899 {
3900 const char *fd_name = fh->elf.root.root.string + 1;
3901
3902 fdh = (struct ppc_link_hash_entry *)
3903 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3904 if (fdh != NULL)
3905 {
3906 fdh->is_func_descriptor = 1;
3907 fdh->oh = fh;
3908 fh->is_func = 1;
3909 fh->oh = fdh;
3910 }
3911 }
3912
3913 return fdh;
3914 }
3915
3916 /* Hacks to support old ABI code.
3917 When making function calls, old ABI code references function entry
3918 points (dot symbols), while new ABI code references the function
3919 descriptor symbol. We need to make any combination of reference and
3920 definition work together, without breaking archive linking.
3921
3922 For a defined function "foo" and an undefined call to "bar":
3923 An old object defines "foo" and ".foo", references ".bar" (possibly
3924 "bar" too).
3925 A new object defines "foo" and references "bar".
3926
3927 A new object thus has no problem with its undefined symbols being
3928 satisfied by definitions in an old object. On the other hand, the
3929 old object won't have ".bar" satisfied by a new object. */
3930
3931 /* Fix function descriptor symbols defined in .opd sections to be
3932 function type. */
3933
3934 static bfd_boolean
3935 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3936 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3937 Elf_Internal_Sym *isym,
3938 const char **name ATTRIBUTE_UNUSED,
3939 flagword *flags ATTRIBUTE_UNUSED,
3940 asection **sec,
3941 bfd_vma *value ATTRIBUTE_UNUSED)
3942 {
3943 if (*sec != NULL
3944 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3945 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3946 return TRUE;
3947 }
3948
3949 /* This function makes an old ABI object reference to ".bar" cause the
3950 inclusion of a new ABI object archive that defines "bar". */
3951
3952 static struct elf_link_hash_entry *
3953 ppc64_elf_archive_symbol_lookup (bfd *abfd,
3954 struct bfd_link_info *info,
3955 const char *name)
3956 {
3957 struct elf_link_hash_entry *h;
3958 char *dot_name;
3959 size_t len;
3960
3961 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
3962 if (h != NULL)
3963 return h;
3964
3965 if (name[0] == '.')
3966 return h;
3967
3968 len = strlen (name);
3969 dot_name = bfd_alloc (abfd, len + 2);
3970 if (dot_name == NULL)
3971 return (struct elf_link_hash_entry *) 0 - 1;
3972 dot_name[0] = '.';
3973 memcpy (dot_name + 1, name, len + 1);
3974 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
3975 bfd_release (abfd, dot_name);
3976 return h;
3977 }
3978
3979 /* This function satisfies all old ABI object references to ".bar" if a
3980 new ABI object defines "bar". Well, at least, undefined dot symbols
3981 are made weak. This stops later archive searches from including an
3982 object if we already have a function descriptor definition. It also
3983 prevents the linker complaining about undefined symbols.
3984 We also check and correct mismatched symbol visibility here. The
3985 most restrictive visibility of the function descriptor and the
3986 function entry symbol is used. */
3987
3988 static bfd_boolean
3989 add_symbol_adjust (struct elf_link_hash_entry *h, void *inf)
3990 {
3991 struct bfd_link_info *info;
3992 struct ppc_link_hash_table *htab;
3993 struct ppc_link_hash_entry *eh;
3994 struct ppc_link_hash_entry *fdh;
3995
3996 if (h->root.type == bfd_link_hash_indirect)
3997 return TRUE;
3998
3999 if (h->root.type == bfd_link_hash_warning)
4000 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4001
4002 if (h->root.root.string[0] != '.')
4003 return TRUE;
4004
4005 info = inf;
4006 htab = ppc_hash_table (info);
4007 eh = (struct ppc_link_hash_entry *) h;
4008 fdh = get_fdh (eh, htab);
4009 if (fdh != NULL)
4010 {
4011 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4012 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4013 if (entry_vis < descr_vis)
4014 fdh->elf.other += entry_vis - descr_vis;
4015 else if (entry_vis > descr_vis)
4016 eh->elf.other += descr_vis - entry_vis;
4017
4018 if (eh->elf.root.type == bfd_link_hash_undefined)
4019 {
4020 eh->elf.root.type = bfd_link_hash_undefweak;
4021 eh->was_undefined = 1;
4022 htab->twiddled_syms = 1;
4023 }
4024 }
4025
4026 return TRUE;
4027 }
4028
4029 static bfd_boolean
4030 ppc64_elf_check_directives (bfd *abfd ATTRIBUTE_UNUSED,
4031 struct bfd_link_info *info)
4032 {
4033 struct ppc_link_hash_table *htab;
4034 extern const bfd_target bfd_elf64_powerpc_vec;
4035 extern const bfd_target bfd_elf64_powerpcle_vec;
4036
4037 htab = ppc_hash_table (info);
4038 if (htab->elf.root.creator != &bfd_elf64_powerpc_vec
4039 && htab->elf.root.creator != &bfd_elf64_powerpcle_vec)
4040 return TRUE;
4041
4042 elf_link_hash_traverse (&htab->elf, add_symbol_adjust, info);
4043
4044 /* We need to fix the undefs list for any syms we have twiddled to
4045 undef_weak. */
4046 if (htab->twiddled_syms)
4047 {
4048 struct bfd_link_hash_entry **pun;
4049
4050 pun = &htab->elf.root.undefs;
4051 while (*pun != NULL)
4052 {
4053 struct bfd_link_hash_entry *h = *pun;
4054
4055 if (h->type != bfd_link_hash_undefined
4056 && h->type != bfd_link_hash_common)
4057 {
4058 *pun = h->und_next;
4059 h->und_next = NULL;
4060 if (h == htab->elf.root.undefs_tail)
4061 {
4062 if (pun == &htab->elf.root.undefs)
4063 htab->elf.root.undefs_tail = NULL;
4064 else
4065 /* pun points at an und_next field. Go back to
4066 the start of the link_hash_entry. */
4067 htab->elf.root.undefs_tail = (struct bfd_link_hash_entry *)
4068 ((char *) pun - ((char *) &h->und_next - (char *) h));
4069 break;
4070 }
4071 }
4072 else
4073 pun = &h->und_next;
4074 }
4075
4076 htab->twiddled_syms = 0;
4077 }
4078 return TRUE;
4079 }
4080
4081 static bfd_boolean
4082 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4083 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4084 {
4085 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4086 char *local_got_tls_masks;
4087
4088 if (local_got_ents == NULL)
4089 {
4090 bfd_size_type size = symtab_hdr->sh_info;
4091
4092 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4093 local_got_ents = bfd_zalloc (abfd, size);
4094 if (local_got_ents == NULL)
4095 return FALSE;
4096 elf_local_got_ents (abfd) = local_got_ents;
4097 }
4098
4099 if ((tls_type & TLS_EXPLICIT) == 0)
4100 {
4101 struct got_entry *ent;
4102
4103 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4104 if (ent->addend == r_addend
4105 && ent->owner == abfd
4106 && ent->tls_type == tls_type)
4107 break;
4108 if (ent == NULL)
4109 {
4110 bfd_size_type amt = sizeof (*ent);
4111 ent = bfd_alloc (abfd, amt);
4112 if (ent == NULL)
4113 return FALSE;
4114 ent->next = local_got_ents[r_symndx];
4115 ent->addend = r_addend;
4116 ent->owner = abfd;
4117 ent->tls_type = tls_type;
4118 ent->got.refcount = 0;
4119 local_got_ents[r_symndx] = ent;
4120 }
4121 ent->got.refcount += 1;
4122 }
4123
4124 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4125 local_got_tls_masks[r_symndx] |= tls_type;
4126 return TRUE;
4127 }
4128
4129 static bfd_boolean
4130 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4131 {
4132 struct plt_entry *ent;
4133
4134 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4135 if (ent->addend == addend)
4136 break;
4137 if (ent == NULL)
4138 {
4139 bfd_size_type amt = sizeof (*ent);
4140 ent = bfd_alloc (abfd, amt);
4141 if (ent == NULL)
4142 return FALSE;
4143 ent->next = eh->elf.plt.plist;
4144 ent->addend = addend;
4145 ent->plt.refcount = 0;
4146 eh->elf.plt.plist = ent;
4147 }
4148 ent->plt.refcount += 1;
4149 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4150 eh->is_func = 1;
4151 return TRUE;
4152 }
4153
4154 /* Look through the relocs for a section during the first phase, and
4155 calculate needed space in the global offset table, procedure
4156 linkage table, and dynamic reloc sections. */
4157
4158 static bfd_boolean
4159 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4160 asection *sec, const Elf_Internal_Rela *relocs)
4161 {
4162 struct ppc_link_hash_table *htab;
4163 Elf_Internal_Shdr *symtab_hdr;
4164 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4165 const Elf_Internal_Rela *rel;
4166 const Elf_Internal_Rela *rel_end;
4167 asection *sreloc;
4168 asection **opd_sym_map;
4169
4170 if (info->relocatable)
4171 return TRUE;
4172
4173 /* Don't do anything special with non-loaded, non-alloced sections.
4174 In particular, any relocs in such sections should not affect GOT
4175 and PLT reference counting (ie. we don't allow them to create GOT
4176 or PLT entries), there's no possibility or desire to optimize TLS
4177 relocs, and there's not much point in propagating relocs to shared
4178 libs that the dynamic linker won't relocate. */
4179 if ((sec->flags & SEC_ALLOC) == 0)
4180 return TRUE;
4181
4182 htab = ppc_hash_table (info);
4183 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4184
4185 sym_hashes = elf_sym_hashes (abfd);
4186 sym_hashes_end = (sym_hashes
4187 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4188 - symtab_hdr->sh_info);
4189
4190 sreloc = NULL;
4191 opd_sym_map = NULL;
4192 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4193 {
4194 /* Garbage collection needs some extra help with .opd sections.
4195 We don't want to necessarily keep everything referenced by
4196 relocs in .opd, as that would keep all functions. Instead,
4197 if we reference an .opd symbol (a function descriptor), we
4198 want to keep the function code symbol's section. This is
4199 easy for global symbols, but for local syms we need to keep
4200 information about the associated function section. Later, if
4201 edit_opd deletes entries, we'll use this array to adjust
4202 local syms in .opd. */
4203 union opd_info {
4204 asection *func_section;
4205 long entry_adjust;
4206 };
4207 bfd_size_type amt;
4208
4209 amt = sec->size * sizeof (union opd_info) / 8;
4210 opd_sym_map = bfd_zalloc (abfd, amt);
4211 if (opd_sym_map == NULL)
4212 return FALSE;
4213 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
4214 }
4215
4216 if (htab->sfpr == NULL
4217 && !create_linkage_sections (htab->elf.dynobj, info))
4218 return FALSE;
4219
4220 rel_end = relocs + sec->reloc_count;
4221 for (rel = relocs; rel < rel_end; rel++)
4222 {
4223 unsigned long r_symndx;
4224 struct elf_link_hash_entry *h;
4225 enum elf_ppc64_reloc_type r_type;
4226 int tls_type = 0;
4227
4228 r_symndx = ELF64_R_SYM (rel->r_info);
4229 if (r_symndx < symtab_hdr->sh_info)
4230 h = NULL;
4231 else
4232 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4233
4234 r_type = ELF64_R_TYPE (rel->r_info);
4235 switch (r_type)
4236 {
4237 case R_PPC64_GOT_TLSLD16:
4238 case R_PPC64_GOT_TLSLD16_LO:
4239 case R_PPC64_GOT_TLSLD16_HI:
4240 case R_PPC64_GOT_TLSLD16_HA:
4241 ppc64_tlsld_got (abfd)->refcount += 1;
4242 tls_type = TLS_TLS | TLS_LD;
4243 goto dogottls;
4244
4245 case R_PPC64_GOT_TLSGD16:
4246 case R_PPC64_GOT_TLSGD16_LO:
4247 case R_PPC64_GOT_TLSGD16_HI:
4248 case R_PPC64_GOT_TLSGD16_HA:
4249 tls_type = TLS_TLS | TLS_GD;
4250 goto dogottls;
4251
4252 case R_PPC64_GOT_TPREL16_DS:
4253 case R_PPC64_GOT_TPREL16_LO_DS:
4254 case R_PPC64_GOT_TPREL16_HI:
4255 case R_PPC64_GOT_TPREL16_HA:
4256 if (info->shared)
4257 info->flags |= DF_STATIC_TLS;
4258 tls_type = TLS_TLS | TLS_TPREL;
4259 goto dogottls;
4260
4261 case R_PPC64_GOT_DTPREL16_DS:
4262 case R_PPC64_GOT_DTPREL16_LO_DS:
4263 case R_PPC64_GOT_DTPREL16_HI:
4264 case R_PPC64_GOT_DTPREL16_HA:
4265 tls_type = TLS_TLS | TLS_DTPREL;
4266 dogottls:
4267 sec->has_tls_reloc = 1;
4268 /* Fall thru */
4269
4270 case R_PPC64_GOT16:
4271 case R_PPC64_GOT16_DS:
4272 case R_PPC64_GOT16_HA:
4273 case R_PPC64_GOT16_HI:
4274 case R_PPC64_GOT16_LO:
4275 case R_PPC64_GOT16_LO_DS:
4276 /* This symbol requires a global offset table entry. */
4277 sec->has_gp_reloc = 1;
4278 if (ppc64_elf_tdata (abfd)->got == NULL
4279 && !create_got_section (abfd, info))
4280 return FALSE;
4281
4282 if (h != NULL)
4283 {
4284 struct ppc_link_hash_entry *eh;
4285 struct got_entry *ent;
4286
4287 eh = (struct ppc_link_hash_entry *) h;
4288 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4289 if (ent->addend == rel->r_addend
4290 && ent->owner == abfd
4291 && ent->tls_type == tls_type)
4292 break;
4293 if (ent == NULL)
4294 {
4295 bfd_size_type amt = sizeof (*ent);
4296 ent = bfd_alloc (abfd, amt);
4297 if (ent == NULL)
4298 return FALSE;
4299 ent->next = eh->elf.got.glist;
4300 ent->addend = rel->r_addend;
4301 ent->owner = abfd;
4302 ent->tls_type = tls_type;
4303 ent->got.refcount = 0;
4304 eh->elf.got.glist = ent;
4305 }
4306 ent->got.refcount += 1;
4307 eh->tls_mask |= tls_type;
4308 }
4309 else
4310 /* This is a global offset table entry for a local symbol. */
4311 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4312 rel->r_addend, tls_type))
4313 return FALSE;
4314 break;
4315
4316 case R_PPC64_PLT16_HA:
4317 case R_PPC64_PLT16_HI:
4318 case R_PPC64_PLT16_LO:
4319 case R_PPC64_PLT32:
4320 case R_PPC64_PLT64:
4321 /* This symbol requires a procedure linkage table entry. We
4322 actually build the entry in adjust_dynamic_symbol,
4323 because this might be a case of linking PIC code without
4324 linking in any dynamic objects, in which case we don't
4325 need to generate a procedure linkage table after all. */
4326 if (h == NULL)
4327 {
4328 /* It does not make sense to have a procedure linkage
4329 table entry for a local symbol. */
4330 bfd_set_error (bfd_error_bad_value);
4331 return FALSE;
4332 }
4333 else
4334 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4335 rel->r_addend))
4336 return FALSE;
4337 break;
4338
4339 /* The following relocations don't need to propagate the
4340 relocation if linking a shared object since they are
4341 section relative. */
4342 case R_PPC64_SECTOFF:
4343 case R_PPC64_SECTOFF_LO:
4344 case R_PPC64_SECTOFF_HI:
4345 case R_PPC64_SECTOFF_HA:
4346 case R_PPC64_SECTOFF_DS:
4347 case R_PPC64_SECTOFF_LO_DS:
4348 case R_PPC64_DTPREL16:
4349 case R_PPC64_DTPREL16_LO:
4350 case R_PPC64_DTPREL16_HI:
4351 case R_PPC64_DTPREL16_HA:
4352 case R_PPC64_DTPREL16_DS:
4353 case R_PPC64_DTPREL16_LO_DS:
4354 case R_PPC64_DTPREL16_HIGHER:
4355 case R_PPC64_DTPREL16_HIGHERA:
4356 case R_PPC64_DTPREL16_HIGHEST:
4357 case R_PPC64_DTPREL16_HIGHESTA:
4358 break;
4359
4360 /* Nor do these. */
4361 case R_PPC64_TOC16:
4362 case R_PPC64_TOC16_LO:
4363 case R_PPC64_TOC16_HI:
4364 case R_PPC64_TOC16_HA:
4365 case R_PPC64_TOC16_DS:
4366 case R_PPC64_TOC16_LO_DS:
4367 sec->has_gp_reloc = 1;
4368 break;
4369
4370 /* This relocation describes the C++ object vtable hierarchy.
4371 Reconstruct it for later use during GC. */
4372 case R_PPC64_GNU_VTINHERIT:
4373 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4374 return FALSE;
4375 break;
4376
4377 /* This relocation describes which C++ vtable entries are actually
4378 used. Record for later use during GC. */
4379 case R_PPC64_GNU_VTENTRY:
4380 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4381 return FALSE;
4382 break;
4383
4384 case R_PPC64_REL14:
4385 case R_PPC64_REL14_BRTAKEN:
4386 case R_PPC64_REL14_BRNTAKEN:
4387 htab->has_14bit_branch = 1;
4388 /* Fall through. */
4389
4390 case R_PPC64_REL24:
4391 if (h != NULL)
4392 {
4393 /* We may need a .plt entry if the function this reloc
4394 refers to is in a shared lib. */
4395 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4396 rel->r_addend))
4397 return FALSE;
4398 if (h == &htab->tls_get_addr->elf
4399 || h == &htab->tls_get_addr_fd->elf)
4400 sec->has_tls_reloc = 1;
4401 else if (htab->tls_get_addr == NULL
4402 && !strncmp (h->root.root.string, ".__tls_get_addr", 15)
4403 && (h->root.root.string[15] == 0
4404 || h->root.root.string[15] == '@'))
4405 {
4406 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4407 sec->has_tls_reloc = 1;
4408 }
4409 else if (htab->tls_get_addr_fd == NULL
4410 && !strncmp (h->root.root.string, "__tls_get_addr", 14)
4411 && (h->root.root.string[14] == 0
4412 || h->root.root.string[14] == '@'))
4413 {
4414 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4415 sec->has_tls_reloc = 1;
4416 }
4417 }
4418 break;
4419
4420 case R_PPC64_TPREL64:
4421 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4422 if (info->shared)
4423 info->flags |= DF_STATIC_TLS;
4424 goto dotlstoc;
4425
4426 case R_PPC64_DTPMOD64:
4427 if (rel + 1 < rel_end
4428 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4429 && rel[1].r_offset == rel->r_offset + 8)
4430 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4431 else
4432 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4433 goto dotlstoc;
4434
4435 case R_PPC64_DTPREL64:
4436 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4437 if (rel != relocs
4438 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4439 && rel[-1].r_offset == rel->r_offset - 8)
4440 /* This is the second reloc of a dtpmod, dtprel pair.
4441 Don't mark with TLS_DTPREL. */
4442 goto dodyn;
4443
4444 dotlstoc:
4445 sec->has_tls_reloc = 1;
4446 if (h != NULL)
4447 {
4448 struct ppc_link_hash_entry *eh;
4449 eh = (struct ppc_link_hash_entry *) h;
4450 eh->tls_mask |= tls_type;
4451 }
4452 else
4453 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4454 rel->r_addend, tls_type))
4455 return FALSE;
4456
4457 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4458 {
4459 /* One extra to simplify get_tls_mask. */
4460 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4461 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
4462 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
4463 return FALSE;
4464 }
4465 BFD_ASSERT (rel->r_offset % 8 == 0);
4466 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
4467
4468 /* Mark the second slot of a GD or LD entry.
4469 -1 to indicate GD and -2 to indicate LD. */
4470 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4471 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
4472 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4473 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
4474 goto dodyn;
4475
4476 case R_PPC64_TPREL16:
4477 case R_PPC64_TPREL16_LO:
4478 case R_PPC64_TPREL16_HI:
4479 case R_PPC64_TPREL16_HA:
4480 case R_PPC64_TPREL16_DS:
4481 case R_PPC64_TPREL16_LO_DS:
4482 case R_PPC64_TPREL16_HIGHER:
4483 case R_PPC64_TPREL16_HIGHERA:
4484 case R_PPC64_TPREL16_HIGHEST:
4485 case R_PPC64_TPREL16_HIGHESTA:
4486 if (info->shared)
4487 {
4488 info->flags |= DF_STATIC_TLS;
4489 goto dodyn;
4490 }
4491 break;
4492
4493 case R_PPC64_ADDR64:
4494 if (opd_sym_map != NULL
4495 && rel + 1 < rel_end
4496 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4497 {
4498 if (h != NULL)
4499 {
4500 if (h->root.root.string[0] == '.'
4501 && h->root.root.string[1] != 0
4502 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4503 ;
4504 else
4505 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4506 }
4507 else
4508 {
4509 asection *s;
4510
4511 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4512 r_symndx);
4513 if (s == NULL)
4514 return FALSE;
4515 else if (s != sec)
4516 opd_sym_map[rel->r_offset / 8] = s;
4517 }
4518 }
4519 /* Fall through. */
4520
4521 case R_PPC64_REL30:
4522 case R_PPC64_REL32:
4523 case R_PPC64_REL64:
4524 case R_PPC64_ADDR14:
4525 case R_PPC64_ADDR14_BRNTAKEN:
4526 case R_PPC64_ADDR14_BRTAKEN:
4527 case R_PPC64_ADDR16:
4528 case R_PPC64_ADDR16_DS:
4529 case R_PPC64_ADDR16_HA:
4530 case R_PPC64_ADDR16_HI:
4531 case R_PPC64_ADDR16_HIGHER:
4532 case R_PPC64_ADDR16_HIGHERA:
4533 case R_PPC64_ADDR16_HIGHEST:
4534 case R_PPC64_ADDR16_HIGHESTA:
4535 case R_PPC64_ADDR16_LO:
4536 case R_PPC64_ADDR16_LO_DS:
4537 case R_PPC64_ADDR24:
4538 case R_PPC64_ADDR32:
4539 case R_PPC64_UADDR16:
4540 case R_PPC64_UADDR32:
4541 case R_PPC64_UADDR64:
4542 case R_PPC64_TOC:
4543 if (h != NULL && !info->shared)
4544 /* We may need a copy reloc. */
4545 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
4546
4547 /* Don't propagate .opd relocs. */
4548 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4549 break;
4550
4551 /* If we are creating a shared library, and this is a reloc
4552 against a global symbol, or a non PC relative reloc
4553 against a local symbol, then we need to copy the reloc
4554 into the shared library. However, if we are linking with
4555 -Bsymbolic, we do not need to copy a reloc against a
4556 global symbol which is defined in an object we are
4557 including in the link (i.e., DEF_REGULAR is set). At
4558 this point we have not seen all the input files, so it is
4559 possible that DEF_REGULAR is not set now but will be set
4560 later (it is never cleared). In case of a weak definition,
4561 DEF_REGULAR may be cleared later by a strong definition in
4562 a shared library. We account for that possibility below by
4563 storing information in the dyn_relocs field of the hash
4564 table entry. A similar situation occurs when creating
4565 shared libraries and symbol visibility changes render the
4566 symbol local.
4567
4568 If on the other hand, we are creating an executable, we
4569 may need to keep relocations for symbols satisfied by a
4570 dynamic library if we manage to avoid copy relocs for the
4571 symbol. */
4572 dodyn:
4573 if ((info->shared
4574 && (MUST_BE_DYN_RELOC (r_type)
4575 || (h != NULL
4576 && (! info->symbolic
4577 || h->root.type == bfd_link_hash_defweak
4578 || (h->elf_link_hash_flags
4579 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4580 || (ELIMINATE_COPY_RELOCS
4581 && !info->shared
4582 && h != NULL
4583 && (h->root.type == bfd_link_hash_defweak
4584 || (h->elf_link_hash_flags
4585 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
4586 {
4587 struct ppc_dyn_relocs *p;
4588 struct ppc_dyn_relocs **head;
4589
4590 /* We must copy these reloc types into the output file.
4591 Create a reloc section in dynobj and make room for
4592 this reloc. */
4593 if (sreloc == NULL)
4594 {
4595 const char *name;
4596 bfd *dynobj;
4597
4598 name = (bfd_elf_string_from_elf_section
4599 (abfd,
4600 elf_elfheader (abfd)->e_shstrndx,
4601 elf_section_data (sec)->rel_hdr.sh_name));
4602 if (name == NULL)
4603 return FALSE;
4604
4605 if (strncmp (name, ".rela", 5) != 0
4606 || strcmp (bfd_get_section_name (abfd, sec),
4607 name + 5) != 0)
4608 {
4609 (*_bfd_error_handler)
4610 (_("%B: bad relocation section name `%s\'"),
4611 abfd, name);
4612 bfd_set_error (bfd_error_bad_value);
4613 }
4614
4615 dynobj = htab->elf.dynobj;
4616 sreloc = bfd_get_section_by_name (dynobj, name);
4617 if (sreloc == NULL)
4618 {
4619 flagword flags;
4620
4621 sreloc = bfd_make_section (dynobj, name);
4622 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4623 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4624 if ((sec->flags & SEC_ALLOC) != 0)
4625 flags |= SEC_ALLOC | SEC_LOAD;
4626 if (sreloc == NULL
4627 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4628 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4629 return FALSE;
4630 }
4631 elf_section_data (sec)->sreloc = sreloc;
4632 }
4633
4634 /* If this is a global symbol, we count the number of
4635 relocations we need for this symbol. */
4636 if (h != NULL)
4637 {
4638 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4639 }
4640 else
4641 {
4642 /* Track dynamic relocs needed for local syms too.
4643 We really need local syms available to do this
4644 easily. Oh well. */
4645
4646 asection *s;
4647 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4648 sec, r_symndx);
4649 if (s == NULL)
4650 return FALSE;
4651
4652 head = ((struct ppc_dyn_relocs **)
4653 &elf_section_data (s)->local_dynrel);
4654 }
4655
4656 p = *head;
4657 if (p == NULL || p->sec != sec)
4658 {
4659 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4660 if (p == NULL)
4661 return FALSE;
4662 p->next = *head;
4663 *head = p;
4664 p->sec = sec;
4665 p->count = 0;
4666 p->pc_count = 0;
4667 }
4668
4669 p->count += 1;
4670 if (!MUST_BE_DYN_RELOC (r_type))
4671 p->pc_count += 1;
4672 }
4673 break;
4674
4675 default:
4676 break;
4677 }
4678 }
4679
4680 return TRUE;
4681 }
4682
4683 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4684 of the code entry point, and its section. */
4685
4686 static bfd_vma
4687 opd_entry_value (asection *opd_sec,
4688 bfd_vma offset,
4689 asection **code_sec,
4690 bfd_vma *code_off)
4691 {
4692 bfd *opd_bfd = opd_sec->owner;
4693 Elf_Internal_Rela *lo, *hi, *look;
4694
4695 /* Go find the opd reloc at the sym address. */
4696 lo = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4697 BFD_ASSERT (lo != NULL);
4698 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
4699
4700 while (lo < hi)
4701 {
4702 look = lo + (hi - lo) / 2;
4703 if (look->r_offset < offset)
4704 lo = look + 1;
4705 else if (look->r_offset > offset)
4706 hi = look;
4707 else
4708 {
4709 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (opd_bfd)->symtab_hdr;
4710 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
4711 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
4712 {
4713 unsigned long symndx = ELF64_R_SYM (look->r_info);
4714 bfd_vma val;
4715 asection *sec;
4716
4717 if (symndx < symtab_hdr->sh_info)
4718 {
4719 Elf_Internal_Sym *sym;
4720
4721 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
4722 if (sym == NULL)
4723 {
4724 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
4725 symtab_hdr->sh_info,
4726 0, NULL, NULL, NULL);
4727 if (sym == NULL)
4728 return (bfd_vma) -1;
4729 symtab_hdr->contents = (bfd_byte *) sym;
4730 }
4731
4732 sym += symndx;
4733 val = sym->st_value;
4734 sec = NULL;
4735 if ((sym->st_shndx != SHN_UNDEF
4736 && sym->st_shndx < SHN_LORESERVE)
4737 || sym->st_shndx > SHN_HIRESERVE)
4738 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
4739 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
4740 }
4741 else
4742 {
4743 struct elf_link_hash_entry **sym_hashes;
4744 struct elf_link_hash_entry *rh;
4745
4746 sym_hashes = elf_sym_hashes (opd_bfd);
4747 rh = sym_hashes[symndx - symtab_hdr->sh_info];
4748 while (rh->root.type == bfd_link_hash_indirect
4749 || rh->root.type == bfd_link_hash_warning)
4750 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
4751 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
4752 || rh->root.type == bfd_link_hash_defweak);
4753 val = rh->root.u.def.value;
4754 sec = rh->root.u.def.section;
4755 }
4756 val += look->r_addend;
4757 if (code_off != NULL)
4758 *code_off = val;
4759 if (code_sec != NULL)
4760 *code_sec = sec;
4761 if (sec != NULL && sec->output_section != NULL)
4762 val += sec->output_section->vma + sec->output_offset;
4763 return val;
4764 }
4765 break;
4766 }
4767 }
4768 return (bfd_vma) -1;
4769 }
4770
4771 /* Return the section that should be marked against GC for a given
4772 relocation. */
4773
4774 static asection *
4775 ppc64_elf_gc_mark_hook (asection *sec,
4776 struct bfd_link_info *info,
4777 Elf_Internal_Rela *rel,
4778 struct elf_link_hash_entry *h,
4779 Elf_Internal_Sym *sym)
4780 {
4781 asection *rsec;
4782
4783 /* First mark all our entry sym sections. */
4784 if (info->gc_sym_list != NULL)
4785 {
4786 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4787 struct bfd_sym_chain *sym = info->gc_sym_list;
4788
4789 info->gc_sym_list = NULL;
4790 do
4791 {
4792 struct ppc_link_hash_entry *eh;
4793
4794 eh = (struct ppc_link_hash_entry *)
4795 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
4796 if (eh == NULL)
4797 continue;
4798 if (eh->elf.root.type != bfd_link_hash_defined
4799 && eh->elf.root.type != bfd_link_hash_defweak)
4800 continue;
4801
4802 if (eh->is_func_descriptor)
4803 rsec = eh->oh->elf.root.u.def.section;
4804 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4805 && opd_entry_value (eh->elf.root.u.def.section,
4806 eh->elf.root.u.def.value,
4807 &rsec, NULL) != (bfd_vma) -1)
4808 ;
4809 else
4810 continue;
4811
4812 if (!rsec->gc_mark)
4813 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4814
4815 rsec = eh->elf.root.u.def.section;
4816 if (!rsec->gc_mark)
4817 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4818
4819 sym = sym->next;
4820 }
4821 while (sym != NULL);
4822 }
4823
4824 /* Syms return NULL if we're marking .opd, so we avoid marking all
4825 function sections, as all functions are referenced in .opd. */
4826 rsec = NULL;
4827 if (get_opd_info (sec) != NULL)
4828 return rsec;
4829
4830 if (h != NULL)
4831 {
4832 enum elf_ppc64_reloc_type r_type;
4833 struct ppc_link_hash_entry *eh;
4834
4835 r_type = ELF64_R_TYPE (rel->r_info);
4836 switch (r_type)
4837 {
4838 case R_PPC64_GNU_VTINHERIT:
4839 case R_PPC64_GNU_VTENTRY:
4840 break;
4841
4842 default:
4843 switch (h->root.type)
4844 {
4845 case bfd_link_hash_defined:
4846 case bfd_link_hash_defweak:
4847 eh = (struct ppc_link_hash_entry *) h;
4848 if (eh->oh != NULL && eh->oh->is_func_descriptor)
4849 eh = eh->oh;
4850
4851 /* Function descriptor syms cause the associated
4852 function code sym section to be marked. */
4853 if (eh->is_func_descriptor)
4854 {
4855 /* They also mark their opd section. */
4856 if (!eh->elf.root.u.def.section->gc_mark)
4857 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4858 ppc64_elf_gc_mark_hook);
4859
4860 rsec = eh->oh->elf.root.u.def.section;
4861 }
4862 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
4863 && opd_entry_value (eh->elf.root.u.def.section,
4864 eh->elf.root.u.def.value,
4865 &rsec, NULL) != (bfd_vma) -1)
4866 {
4867 if (!eh->elf.root.u.def.section->gc_mark)
4868 _bfd_elf_gc_mark (info, eh->elf.root.u.def.section,
4869 ppc64_elf_gc_mark_hook);
4870 }
4871 else
4872 rsec = h->root.u.def.section;
4873 break;
4874
4875 case bfd_link_hash_common:
4876 rsec = h->root.u.c.p->section;
4877 break;
4878
4879 default:
4880 break;
4881 }
4882 }
4883 }
4884 else
4885 {
4886 asection **opd_sym_section;
4887
4888 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4889 opd_sym_section = get_opd_info (rsec);
4890 if (opd_sym_section != NULL)
4891 {
4892 if (!rsec->gc_mark)
4893 _bfd_elf_gc_mark (info, rsec, ppc64_elf_gc_mark_hook);
4894
4895 rsec = opd_sym_section[sym->st_value / 8];
4896 }
4897 }
4898
4899 return rsec;
4900 }
4901
4902 /* Update the .got, .plt. and dynamic reloc reference counts for the
4903 section being removed. */
4904
4905 static bfd_boolean
4906 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4907 asection *sec, const Elf_Internal_Rela *relocs)
4908 {
4909 struct ppc_link_hash_table *htab;
4910 Elf_Internal_Shdr *symtab_hdr;
4911 struct elf_link_hash_entry **sym_hashes;
4912 struct got_entry **local_got_ents;
4913 const Elf_Internal_Rela *rel, *relend;
4914
4915 if ((sec->flags & SEC_ALLOC) == 0)
4916 return TRUE;
4917
4918 elf_section_data (sec)->local_dynrel = NULL;
4919
4920 htab = ppc_hash_table (info);
4921 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4922 sym_hashes = elf_sym_hashes (abfd);
4923 local_got_ents = elf_local_got_ents (abfd);
4924
4925 relend = relocs + sec->reloc_count;
4926 for (rel = relocs; rel < relend; rel++)
4927 {
4928 unsigned long r_symndx;
4929 enum elf_ppc64_reloc_type r_type;
4930 struct elf_link_hash_entry *h = NULL;
4931 char tls_type = 0;
4932
4933 r_symndx = ELF64_R_SYM (rel->r_info);
4934 r_type = ELF64_R_TYPE (rel->r_info);
4935 if (r_symndx >= symtab_hdr->sh_info)
4936 {
4937 struct ppc_link_hash_entry *eh;
4938 struct ppc_dyn_relocs **pp;
4939 struct ppc_dyn_relocs *p;
4940
4941 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4942 eh = (struct ppc_link_hash_entry *) h;
4943
4944 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4945 if (p->sec == sec)
4946 {
4947 /* Everything must go for SEC. */
4948 *pp = p->next;
4949 break;
4950 }
4951 }
4952
4953 switch (r_type)
4954 {
4955 case R_PPC64_GOT_TLSLD16:
4956 case R_PPC64_GOT_TLSLD16_LO:
4957 case R_PPC64_GOT_TLSLD16_HI:
4958 case R_PPC64_GOT_TLSLD16_HA:
4959 ppc64_tlsld_got (abfd)->refcount -= 1;
4960 tls_type = TLS_TLS | TLS_LD;
4961 goto dogot;
4962
4963 case R_PPC64_GOT_TLSGD16:
4964 case R_PPC64_GOT_TLSGD16_LO:
4965 case R_PPC64_GOT_TLSGD16_HI:
4966 case R_PPC64_GOT_TLSGD16_HA:
4967 tls_type = TLS_TLS | TLS_GD;
4968 goto dogot;
4969
4970 case R_PPC64_GOT_TPREL16_DS:
4971 case R_PPC64_GOT_TPREL16_LO_DS:
4972 case R_PPC64_GOT_TPREL16_HI:
4973 case R_PPC64_GOT_TPREL16_HA:
4974 tls_type = TLS_TLS | TLS_TPREL;
4975 goto dogot;
4976
4977 case R_PPC64_GOT_DTPREL16_DS:
4978 case R_PPC64_GOT_DTPREL16_LO_DS:
4979 case R_PPC64_GOT_DTPREL16_HI:
4980 case R_PPC64_GOT_DTPREL16_HA:
4981 tls_type = TLS_TLS | TLS_DTPREL;
4982 goto dogot;
4983
4984 case R_PPC64_GOT16:
4985 case R_PPC64_GOT16_DS:
4986 case R_PPC64_GOT16_HA:
4987 case R_PPC64_GOT16_HI:
4988 case R_PPC64_GOT16_LO:
4989 case R_PPC64_GOT16_LO_DS:
4990 dogot:
4991 {
4992 struct got_entry *ent;
4993
4994 if (h != NULL)
4995 ent = h->got.glist;
4996 else
4997 ent = local_got_ents[r_symndx];
4998
4999 for (; ent != NULL; ent = ent->next)
5000 if (ent->addend == rel->r_addend
5001 && ent->owner == abfd
5002 && ent->tls_type == tls_type)
5003 break;
5004 if (ent == NULL)
5005 abort ();
5006 if (ent->got.refcount > 0)
5007 ent->got.refcount -= 1;
5008 }
5009 break;
5010
5011 case R_PPC64_PLT16_HA:
5012 case R_PPC64_PLT16_HI:
5013 case R_PPC64_PLT16_LO:
5014 case R_PPC64_PLT32:
5015 case R_PPC64_PLT64:
5016 case R_PPC64_REL14:
5017 case R_PPC64_REL14_BRNTAKEN:
5018 case R_PPC64_REL14_BRTAKEN:
5019 case R_PPC64_REL24:
5020 if (h != NULL)
5021 {
5022 struct plt_entry *ent;
5023
5024 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5025 if (ent->addend == rel->r_addend)
5026 break;
5027 if (ent == NULL)
5028 abort ();
5029 if (ent->plt.refcount > 0)
5030 ent->plt.refcount -= 1;
5031 }
5032 break;
5033
5034 default:
5035 break;
5036 }
5037 }
5038 return TRUE;
5039 }
5040
5041 /* Called via elf_link_hash_traverse to transfer dynamic linking
5042 information on function code symbol entries to their corresponding
5043 function descriptor symbol entries. */
5044 static bfd_boolean
5045 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5046 {
5047 struct bfd_link_info *info;
5048 struct ppc_link_hash_table *htab;
5049 struct plt_entry *ent;
5050 struct ppc_link_hash_entry *fh;
5051 struct ppc_link_hash_entry *fdh;
5052 bfd_boolean force_local;
5053
5054 fh = (struct ppc_link_hash_entry *) h;
5055 if (fh->elf.root.type == bfd_link_hash_indirect)
5056 return TRUE;
5057
5058 if (fh->elf.root.type == bfd_link_hash_warning)
5059 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5060
5061 info = inf;
5062 htab = ppc_hash_table (info);
5063
5064 /* Resolve undefined references to dot-symbols as the value
5065 in the function descriptor, if we have one in a regular object.
5066 This is to satisfy cases like ".quad .foo". Calls to functions
5067 in dynamic objects are handled elsewhere. */
5068 if (fh->elf.root.type == bfd_link_hash_undefweak
5069 && fh->was_undefined
5070 && (fh->oh->elf.root.type == bfd_link_hash_defined
5071 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5072 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5073 && opd_entry_value (fh->oh->elf.root.u.def.section,
5074 fh->oh->elf.root.u.def.value,
5075 &fh->elf.root.u.def.section,
5076 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5077 {
5078 fh->elf.root.type = fh->oh->elf.root.type;
5079 fh->elf.elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
5080 }
5081
5082 /* If this is a function code symbol, transfer dynamic linking
5083 information to the function descriptor symbol. */
5084 if (!fh->is_func)
5085 return TRUE;
5086
5087 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5088 if (ent->plt.refcount > 0)
5089 break;
5090 if (ent == NULL
5091 || fh->elf.root.root.string[0] != '.'
5092 || fh->elf.root.root.string[1] == '\0')
5093 return TRUE;
5094
5095 /* Find the corresponding function descriptor symbol. Create it
5096 as undefined if necessary. */
5097
5098 fdh = get_fdh (fh, htab);
5099 if (fdh != NULL)
5100 while (fdh->elf.root.type == bfd_link_hash_indirect
5101 || fdh->elf.root.type == bfd_link_hash_warning)
5102 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5103
5104 if (fdh == NULL
5105 && info->shared
5106 && (fh->elf.root.type == bfd_link_hash_undefined
5107 || fh->elf.root.type == bfd_link_hash_undefweak))
5108 {
5109 bfd *abfd;
5110 asymbol *newsym;
5111 struct bfd_link_hash_entry *bh;
5112
5113 abfd = fh->elf.root.u.undef.abfd;
5114 newsym = bfd_make_empty_symbol (abfd);
5115 newsym->name = fh->elf.root.root.string + 1;
5116 newsym->section = bfd_und_section_ptr;
5117 newsym->value = 0;
5118 newsym->flags = BSF_OBJECT;
5119 if (fh->elf.root.type == bfd_link_hash_undefweak)
5120 newsym->flags |= BSF_WEAK;
5121
5122 bh = &fdh->elf.root;
5123 if ( !(_bfd_generic_link_add_one_symbol
5124 (info, abfd, newsym->name, newsym->flags,
5125 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
5126 {
5127 return FALSE;
5128 }
5129 fdh = (struct ppc_link_hash_entry *) bh;
5130 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
5131 fdh->elf.size = 24;
5132 fdh->elf.type = STT_OBJECT;
5133 }
5134
5135 if (fdh != NULL
5136 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
5137 && (info->shared
5138 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5139 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
5140 || (fdh->elf.root.type == bfd_link_hash_undefweak
5141 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5142 {
5143 if (fdh->elf.dynindx == -1)
5144 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5145 return FALSE;
5146 fdh->elf.elf_link_hash_flags
5147 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
5148 | ELF_LINK_HASH_REF_DYNAMIC
5149 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
5150 | ELF_LINK_NON_GOT_REF));
5151 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5152 {
5153 struct plt_entry **ep = &fdh->elf.plt.plist;
5154 while (*ep != NULL)
5155 ep = &(*ep)->next;
5156 *ep = fh->elf.plt.plist;
5157 fh->elf.plt.plist = NULL;
5158 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
5159 }
5160 fdh->is_func_descriptor = 1;
5161 fdh->oh = fh;
5162 fh->oh = fdh;
5163 }
5164
5165 /* Now that the info is on the function descriptor, clear the
5166 function code sym info. Any function code syms for which we
5167 don't have a definition in a regular file, we force local.
5168 This prevents a shared library from exporting syms that have
5169 been imported from another library. Function code syms that
5170 are really in the library we must leave global to prevent the
5171 linker dragging in a definition from a static library. */
5172 force_local
5173 = (info->shared
5174 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
5175 || fdh == NULL
5176 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
5177 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
5178 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5179
5180 return TRUE;
5181 }
5182
5183 #define MIN_SAVE_FPR 14
5184 #define MAX_SAVE_FPR 31
5185
5186 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5187 this hook to a) provide some gcc support functions, and b) transfer
5188 dynamic linking information gathered so far on function code symbol
5189 entries, to their corresponding function descriptor symbol entries. */
5190 static bfd_boolean
5191 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5192 struct bfd_link_info *info)
5193 {
5194 struct ppc_link_hash_table *htab;
5195 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
5196 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
5197 unsigned int i;
5198 struct elf_link_hash_entry *h;
5199 bfd_byte *p;
5200 char sym[10];
5201
5202 htab = ppc_hash_table (info);
5203
5204 if (htab->sfpr == NULL)
5205 /* We don't have any relocs. */
5206 return TRUE;
5207
5208 /* First provide any missing ._savef* and ._restf* functions. */
5209 memcpy (sym, "._savef14", 10);
5210 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
5211 {
5212 sym[7] = i / 10 + '0';
5213 sym[8] = i % 10 + '0';
5214 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5215 if (h != NULL
5216 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5217 {
5218 if (lowest_savef > i)
5219 lowest_savef = i;
5220 h->root.type = bfd_link_hash_defined;
5221 h->root.u.def.section = htab->sfpr;
5222 h->root.u.def.value = (i - lowest_savef) * 4;
5223 h->type = STT_FUNC;
5224 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
5225 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5226 }
5227 }
5228
5229 memcpy (sym, "._restf14", 10);
5230 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
5231 {
5232 sym[7] = i / 10 + '0';
5233 sym[8] = i % 10 + '0';
5234 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5235 if (h != NULL
5236 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5237 {
5238 if (lowest_restf > i)
5239 lowest_restf = i;
5240 h->root.type = bfd_link_hash_defined;
5241 h->root.u.def.section = htab->sfpr;
5242 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
5243 + (i - lowest_restf) * 4);
5244 h->type = STT_FUNC;
5245 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
5246 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5247 }
5248 }
5249
5250 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5251
5252 htab->sfpr->size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
5253 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
5254
5255 if (htab->sfpr->size == 0)
5256 {
5257 _bfd_strip_section_from_output (info, htab->sfpr);
5258 return TRUE;
5259 }
5260
5261 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->size);
5262 if (p == NULL)
5263 return FALSE;
5264 htab->sfpr->contents = p;
5265
5266 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
5267 {
5268 unsigned int fpr = i << 21;
5269 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
5270 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
5271 p += 4;
5272 }
5273 if (lowest_savef <= MAX_SAVE_FPR)
5274 {
5275 bfd_put_32 (htab->elf.dynobj, BLR, p);
5276 p += 4;
5277 }
5278
5279 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
5280 {
5281 unsigned int fpr = i << 21;
5282 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
5283 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
5284 p += 4;
5285 }
5286 if (lowest_restf <= MAX_SAVE_FPR)
5287 bfd_put_32 (htab->elf.dynobj, BLR, p);
5288
5289 return TRUE;
5290 }
5291
5292 /* Adjust a symbol defined by a dynamic object and referenced by a
5293 regular object. The current definition is in some section of the
5294 dynamic object, but we're not including those sections. We have to
5295 change the definition to something the rest of the link can
5296 understand. */
5297
5298 static bfd_boolean
5299 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5300 struct elf_link_hash_entry *h)
5301 {
5302 struct ppc_link_hash_table *htab;
5303 asection *s;
5304 unsigned int power_of_two;
5305
5306 htab = ppc_hash_table (info);
5307
5308 /* Deal with function syms. */
5309 if (h->type == STT_FUNC
5310 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
5311 {
5312 /* Clear procedure linkage table information for any symbol that
5313 won't need a .plt entry. */
5314 struct plt_entry *ent;
5315 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5316 if (ent->plt.refcount > 0)
5317 break;
5318 if (ent == NULL
5319 || SYMBOL_CALLS_LOCAL (info, h)
5320 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5321 && h->root.type == bfd_link_hash_undefweak))
5322 {
5323 h->plt.plist = NULL;
5324 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5325 }
5326 }
5327 else
5328 h->plt.plist = NULL;
5329
5330 /* If this is a weak symbol, and there is a real definition, the
5331 processor independent code will have arranged for us to see the
5332 real definition first, and we can just use the same value. */
5333 if (h->weakdef != NULL)
5334 {
5335 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
5336 || h->weakdef->root.type == bfd_link_hash_defweak);
5337 h->root.u.def.section = h->weakdef->root.u.def.section;
5338 h->root.u.def.value = h->weakdef->root.u.def.value;
5339 if (ELIMINATE_COPY_RELOCS)
5340 h->elf_link_hash_flags
5341 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
5342 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
5343 return TRUE;
5344 }
5345
5346 /* If we are creating a shared library, we must presume that the
5347 only references to the symbol are via the global offset table.
5348 For such cases we need not do anything here; the relocations will
5349 be handled correctly by relocate_section. */
5350 if (info->shared)
5351 return TRUE;
5352
5353 /* If there are no references to this symbol that do not use the
5354 GOT, we don't need to generate a copy reloc. */
5355 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
5356 return TRUE;
5357
5358 if (ELIMINATE_COPY_RELOCS)
5359 {
5360 struct ppc_link_hash_entry * eh;
5361 struct ppc_dyn_relocs *p;
5362
5363 eh = (struct ppc_link_hash_entry *) h;
5364 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5365 {
5366 s = p->sec->output_section;
5367 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5368 break;
5369 }
5370
5371 /* If we didn't find any dynamic relocs in read-only sections, then
5372 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5373 if (p == NULL)
5374 {
5375 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
5376 return TRUE;
5377 }
5378 }
5379
5380 if (h->plt.plist != NULL)
5381 {
5382 /* We should never get here, but unfortunately there are versions
5383 of gcc out there that improperly (for this ABI) put initialized
5384 function pointers, vtable refs and suchlike in read-only
5385 sections. Allow them to proceed, but warn that this might
5386 break at runtime. */
5387 (*_bfd_error_handler)
5388 (_("copy reloc against `%s' requires lazy plt linking; "
5389 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5390 h->root.root.string);
5391 }
5392
5393 /* This is a reference to a symbol defined by a dynamic object which
5394 is not a function. */
5395
5396 /* We must allocate the symbol in our .dynbss section, which will
5397 become part of the .bss section of the executable. There will be
5398 an entry for this symbol in the .dynsym section. The dynamic
5399 object will contain position independent code, so all references
5400 from the dynamic object to this symbol will go through the global
5401 offset table. The dynamic linker will use the .dynsym entry to
5402 determine the address it must put in the global offset table, so
5403 both the dynamic object and the regular object will refer to the
5404 same memory location for the variable. */
5405
5406 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5407 to copy the initial value out of the dynamic object and into the
5408 runtime process image. We need to remember the offset into the
5409 .rela.bss section we are going to use. */
5410 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5411 {
5412 htab->relbss->size += sizeof (Elf64_External_Rela);
5413 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
5414 }
5415
5416 /* We need to figure out the alignment required for this symbol. I
5417 have no idea how ELF linkers handle this. */
5418 power_of_two = bfd_log2 (h->size);
5419 if (power_of_two > 4)
5420 power_of_two = 4;
5421
5422 /* Apply the required alignment. */
5423 s = htab->dynbss;
5424 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5425 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
5426 {
5427 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
5428 return FALSE;
5429 }
5430
5431 /* Define the symbol as being at this point in the section. */
5432 h->root.u.def.section = s;
5433 h->root.u.def.value = s->size;
5434
5435 /* Increment the section size to make room for the symbol. */
5436 s->size += h->size;
5437
5438 return TRUE;
5439 }
5440
5441 /* If given a function descriptor symbol, hide both the function code
5442 sym and the descriptor. */
5443 static void
5444 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5445 struct elf_link_hash_entry *h,
5446 bfd_boolean force_local)
5447 {
5448 struct ppc_link_hash_entry *eh;
5449 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5450
5451 eh = (struct ppc_link_hash_entry *) h;
5452 if (eh->is_func_descriptor)
5453 {
5454 struct ppc_link_hash_entry *fh = eh->oh;
5455
5456 if (fh == NULL)
5457 {
5458 const char *p, *q;
5459 struct ppc_link_hash_table *htab;
5460 char save;
5461
5462 /* We aren't supposed to use alloca in BFD because on
5463 systems which do not have alloca the version in libiberty
5464 calls xmalloc, which might cause the program to crash
5465 when it runs out of memory. This function doesn't have a
5466 return status, so there's no way to gracefully return an
5467 error. So cheat. We know that string[-1] can be safely
5468 accessed; It's either a string in an ELF string table,
5469 or allocated in an objalloc structure. */
5470
5471 p = eh->elf.root.root.string - 1;
5472 save = *p;
5473 *(char *) p = '.';
5474 htab = ppc_hash_table (info);
5475 fh = (struct ppc_link_hash_entry *)
5476 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5477 *(char *) p = save;
5478
5479 /* Unfortunately, if it so happens that the string we were
5480 looking for was allocated immediately before this string,
5481 then we overwrote the string terminator. That's the only
5482 reason the lookup should fail. */
5483 if (fh == NULL)
5484 {
5485 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5486 while (q >= eh->elf.root.root.string && *q == *p)
5487 --q, --p;
5488 if (q < eh->elf.root.root.string && *p == '.')
5489 fh = (struct ppc_link_hash_entry *)
5490 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5491 }
5492 if (fh != NULL)
5493 {
5494 eh->oh = fh;
5495 fh->oh = eh;
5496 }
5497 }
5498 if (fh != NULL)
5499 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5500 }
5501 }
5502
5503 static bfd_boolean
5504 get_sym_h (struct elf_link_hash_entry **hp,
5505 Elf_Internal_Sym **symp,
5506 asection **symsecp,
5507 char **tls_maskp,
5508 Elf_Internal_Sym **locsymsp,
5509 unsigned long r_symndx,
5510 bfd *ibfd)
5511 {
5512 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5513
5514 if (r_symndx >= symtab_hdr->sh_info)
5515 {
5516 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5517 struct elf_link_hash_entry *h;
5518
5519 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5520 while (h->root.type == bfd_link_hash_indirect
5521 || h->root.type == bfd_link_hash_warning)
5522 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5523
5524 if (hp != NULL)
5525 *hp = h;
5526
5527 if (symp != NULL)
5528 *symp = NULL;
5529
5530 if (symsecp != NULL)
5531 {
5532 asection *symsec = NULL;
5533 if (h->root.type == bfd_link_hash_defined
5534 || h->root.type == bfd_link_hash_defweak)
5535 symsec = h->root.u.def.section;
5536 *symsecp = symsec;
5537 }
5538
5539 if (tls_maskp != NULL)
5540 {
5541 struct ppc_link_hash_entry *eh;
5542
5543 eh = (struct ppc_link_hash_entry *) h;
5544 *tls_maskp = &eh->tls_mask;
5545 }
5546 }
5547 else
5548 {
5549 Elf_Internal_Sym *sym;
5550 Elf_Internal_Sym *locsyms = *locsymsp;
5551
5552 if (locsyms == NULL)
5553 {
5554 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5555 if (locsyms == NULL)
5556 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5557 symtab_hdr->sh_info,
5558 0, NULL, NULL, NULL);
5559 if (locsyms == NULL)
5560 return FALSE;
5561 *locsymsp = locsyms;
5562 }
5563 sym = locsyms + r_symndx;
5564
5565 if (hp != NULL)
5566 *hp = NULL;
5567
5568 if (symp != NULL)
5569 *symp = sym;
5570
5571 if (symsecp != NULL)
5572 {
5573 asection *symsec = NULL;
5574 if ((sym->st_shndx != SHN_UNDEF
5575 && sym->st_shndx < SHN_LORESERVE)
5576 || sym->st_shndx > SHN_HIRESERVE)
5577 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5578 *symsecp = symsec;
5579 }
5580
5581 if (tls_maskp != NULL)
5582 {
5583 struct got_entry **lgot_ents;
5584 char *tls_mask;
5585
5586 tls_mask = NULL;
5587 lgot_ents = elf_local_got_ents (ibfd);
5588 if (lgot_ents != NULL)
5589 {
5590 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
5591 tls_mask = &lgot_masks[r_symndx];
5592 }
5593 *tls_maskp = tls_mask;
5594 }
5595 }
5596 return TRUE;
5597 }
5598
5599 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
5600 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
5601 type suitable for optimization, and 1 otherwise. */
5602
5603 static int
5604 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
5605 Elf_Internal_Sym **locsymsp,
5606 const Elf_Internal_Rela *rel, bfd *ibfd)
5607 {
5608 unsigned long r_symndx;
5609 int next_r;
5610 struct elf_link_hash_entry *h;
5611 Elf_Internal_Sym *sym;
5612 asection *sec;
5613 bfd_vma off;
5614
5615 r_symndx = ELF64_R_SYM (rel->r_info);
5616 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5617 return 0;
5618
5619 if ((*tls_maskp != NULL && **tls_maskp != 0)
5620 || sec == NULL
5621 || ppc64_elf_section_data (sec)->t_symndx == NULL)
5622 return 1;
5623
5624 /* Look inside a TOC section too. */
5625 if (h != NULL)
5626 {
5627 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
5628 off = h->root.u.def.value;
5629 }
5630 else
5631 off = sym->st_value;
5632 off += rel->r_addend;
5633 BFD_ASSERT (off % 8 == 0);
5634 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
5635 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
5636 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
5637 return 0;
5638 if (toc_symndx != NULL)
5639 *toc_symndx = r_symndx;
5640 if ((h == NULL
5641 || ((h->root.type == bfd_link_hash_defined
5642 || h->root.type == bfd_link_hash_defweak)
5643 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
5644 && (next_r == -1 || next_r == -2))
5645 return 1 - next_r;
5646 return 1;
5647 }
5648
5649 /* Adjust all global syms defined in opd sections. In gcc generated
5650 code for the old ABI, these will already have been done. */
5651
5652 static bfd_boolean
5653 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
5654 {
5655 struct ppc_link_hash_entry *eh;
5656 asection *sym_sec;
5657 long *opd_adjust;
5658
5659 if (h->root.type == bfd_link_hash_indirect)
5660 return TRUE;
5661
5662 if (h->root.type == bfd_link_hash_warning)
5663 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5664
5665 if (h->root.type != bfd_link_hash_defined
5666 && h->root.type != bfd_link_hash_defweak)
5667 return TRUE;
5668
5669 eh = (struct ppc_link_hash_entry *) h;
5670 if (eh->adjust_done)
5671 return TRUE;
5672
5673 sym_sec = eh->elf.root.u.def.section;
5674 opd_adjust = get_opd_info (sym_sec);
5675 if (opd_adjust != NULL)
5676 {
5677 long adjust = opd_adjust[eh->elf.root.u.def.value / 8];
5678 if (adjust == -1)
5679 {
5680 /* This entry has been deleted. */
5681 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
5682 if (dsec == NULL)
5683 {
5684 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
5685 if (elf_discarded_section (dsec))
5686 {
5687 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
5688 break;
5689 }
5690 }
5691 eh->elf.root.u.def.value = 0;
5692 eh->elf.root.u.def.section = dsec;
5693 }
5694 else
5695 eh->elf.root.u.def.value += adjust;
5696 eh->adjust_done = 1;
5697 }
5698 return TRUE;
5699 }
5700
5701 /* Remove unused Official Procedure Descriptor entries. Currently we
5702 only remove those associated with functions in discarded link-once
5703 sections, or weakly defined functions that have been overridden. It
5704 would be possible to remove many more entries for statically linked
5705 applications. */
5706
5707 bfd_boolean
5708 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
5709 bfd_boolean non_overlapping)
5710 {
5711 bfd *ibfd;
5712 bfd_boolean some_edited = FALSE;
5713 asection *need_pad = NULL;
5714
5715 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5716 {
5717 asection *sec;
5718 Elf_Internal_Rela *relstart, *rel, *relend;
5719 Elf_Internal_Shdr *symtab_hdr;
5720 Elf_Internal_Sym *local_syms;
5721 struct elf_link_hash_entry **sym_hashes;
5722 bfd_vma offset;
5723 bfd_size_type amt;
5724 long *opd_adjust;
5725 bfd_boolean need_edit, add_aux_fields;
5726 bfd_size_type cnt_16b = 0;
5727
5728 sec = bfd_get_section_by_name (ibfd, ".opd");
5729 if (sec == NULL)
5730 continue;
5731
5732 amt = sec->size * sizeof (long) / 8;
5733 opd_adjust = get_opd_info (sec);
5734 if (opd_adjust == NULL)
5735 {
5736 /* Must be a ld -r link. ie. check_relocs hasn't been
5737 called. */
5738 opd_adjust = bfd_zalloc (obfd, amt);
5739 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
5740 }
5741 memset (opd_adjust, 0, amt);
5742
5743 if (sec->output_section == bfd_abs_section_ptr)
5744 continue;
5745
5746 /* Look through the section relocs. */
5747 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
5748 continue;
5749
5750 local_syms = NULL;
5751 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5752 sym_hashes = elf_sym_hashes (ibfd);
5753
5754 /* Read the relocations. */
5755 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5756 info->keep_memory);
5757 if (relstart == NULL)
5758 return FALSE;
5759
5760 /* First run through the relocs to check they are sane, and to
5761 determine whether we need to edit this opd section. */
5762 need_edit = FALSE;
5763 need_pad = sec;
5764 offset = 0;
5765 relend = relstart + sec->reloc_count;
5766 for (rel = relstart; rel < relend; )
5767 {
5768 enum elf_ppc64_reloc_type r_type;
5769 unsigned long r_symndx;
5770 asection *sym_sec;
5771 struct elf_link_hash_entry *h;
5772 Elf_Internal_Sym *sym;
5773
5774 /* .opd contains a regular array of 16 or 24 byte entries. We're
5775 only interested in the reloc pointing to a function entry
5776 point. */
5777 if (rel->r_offset != offset
5778 || rel + 1 >= relend
5779 || (rel + 1)->r_offset != offset + 8)
5780 {
5781 /* If someone messes with .opd alignment then after a
5782 "ld -r" we might have padding in the middle of .opd.
5783 Also, there's nothing to prevent someone putting
5784 something silly in .opd with the assembler. No .opd
5785 optimization for them! */
5786 broken_opd:
5787 (*_bfd_error_handler)
5788 (_("%B: .opd is not a regular array of opd entries"), ibfd);
5789 need_edit = FALSE;
5790 break;
5791 }
5792
5793 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
5794 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
5795 {
5796 (*_bfd_error_handler)
5797 (_("%B: unexpected reloc type %u in .opd section"),
5798 ibfd, r_type);
5799 need_edit = FALSE;
5800 break;
5801 }
5802
5803 r_symndx = ELF64_R_SYM (rel->r_info);
5804 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5805 r_symndx, ibfd))
5806 goto error_ret;
5807
5808 if (sym_sec == NULL || sym_sec->owner == NULL)
5809 {
5810 const char *sym_name;
5811 if (h != NULL)
5812 sym_name = h->root.root.string;
5813 else
5814 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5815
5816 (*_bfd_error_handler)
5817 (_("%B: undefined sym `%s' in .opd section"),
5818 ibfd, sym_name);
5819 need_edit = FALSE;
5820 break;
5821 }
5822
5823 /* opd entries are always for functions defined in the
5824 current input bfd. If the symbol isn't defined in the
5825 input bfd, then we won't be using the function in this
5826 bfd; It must be defined in a linkonce section in another
5827 bfd, or is weak. It's also possible that we are
5828 discarding the function due to a linker script /DISCARD/,
5829 which we test for via the output_section. */
5830 if (sym_sec->owner != ibfd
5831 || sym_sec->output_section == bfd_abs_section_ptr)
5832 need_edit = TRUE;
5833
5834 rel += 2;
5835 if (rel == relend
5836 || (rel + 1 == relend && rel->r_offset == offset + 16))
5837 {
5838 if (sec->size == offset + 24)
5839 {
5840 need_pad = NULL;
5841 break;
5842 }
5843 if (rel == relend && sec->size == offset + 16)
5844 {
5845 cnt_16b++;
5846 break;
5847 }
5848 goto broken_opd;
5849 }
5850
5851 if (rel->r_offset == offset + 24)
5852 offset += 24;
5853 else if (rel->r_offset != offset + 16)
5854 goto broken_opd;
5855 else if (rel + 1 < relend
5856 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
5857 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
5858 {
5859 offset += 16;
5860 cnt_16b++;
5861 }
5862 else if (rel + 2 < relend
5863 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
5864 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
5865 {
5866 offset += 24;
5867 rel += 1;
5868 }
5869 else
5870 goto broken_opd;
5871 }
5872
5873 add_aux_fields = non_overlapping && cnt_16b > 0;
5874
5875 if (need_edit || add_aux_fields)
5876 {
5877 Elf_Internal_Rela *write_rel;
5878 bfd_byte *rptr, *wptr;
5879 bfd_byte *new_contents = NULL;
5880 bfd_boolean skip;
5881 long opd_ent_size;
5882
5883 /* This seems a waste of time as input .opd sections are all
5884 zeros as generated by gcc, but I suppose there's no reason
5885 this will always be so. We might start putting something in
5886 the third word of .opd entries. */
5887 if ((sec->flags & SEC_IN_MEMORY) == 0)
5888 {
5889 bfd_byte *loc;
5890 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
5891 {
5892 if (loc != NULL)
5893 free (loc);
5894 error_ret:
5895 if (local_syms != NULL
5896 && symtab_hdr->contents != (unsigned char *) local_syms)
5897 free (local_syms);
5898 if (elf_section_data (sec)->relocs != relstart)
5899 free (relstart);
5900 return FALSE;
5901 }
5902 sec->contents = loc;
5903 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5904 }
5905
5906 elf_section_data (sec)->relocs = relstart;
5907
5908 wptr = sec->contents;
5909 rptr = sec->contents;
5910 new_contents = sec->contents;
5911
5912 if (add_aux_fields)
5913 {
5914 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
5915 if (new_contents == NULL)
5916 return FALSE;
5917 need_pad = FALSE;
5918 wptr = new_contents;
5919 }
5920
5921 write_rel = relstart;
5922 skip = FALSE;
5923 offset = 0;
5924 opd_ent_size = 0;
5925 for (rel = relstart; rel < relend; rel++)
5926 {
5927 unsigned long r_symndx;
5928 asection *sym_sec;
5929 struct elf_link_hash_entry *h;
5930 Elf_Internal_Sym *sym;
5931
5932 r_symndx = ELF64_R_SYM (rel->r_info);
5933 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5934 r_symndx, ibfd))
5935 goto error_ret;
5936
5937 if (rel->r_offset == offset)
5938 {
5939 struct ppc_link_hash_entry *fdh = NULL;
5940
5941 /* See if the .opd entry is full 24 byte or
5942 16 byte (with fd_aux entry overlapped with next
5943 fd_func). */
5944 opd_ent_size = 24;
5945 if ((rel + 2 == relend && sec->size == offset + 16)
5946 || (rel + 3 < relend
5947 && rel[2].r_offset == offset + 16
5948 && rel[3].r_offset == offset + 24
5949 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
5950 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
5951 opd_ent_size = 16;
5952
5953 if (h != NULL
5954 && h->root.root.string[0] == '.')
5955 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5956 ppc_hash_table (info));
5957
5958 skip = (sym_sec->owner != ibfd
5959 || sym_sec->output_section == bfd_abs_section_ptr);
5960 if (skip)
5961 {
5962 if (fdh != NULL && sym_sec->owner == ibfd)
5963 {
5964 /* Arrange for the function descriptor sym
5965 to be dropped. */
5966 fdh->elf.root.u.def.value = 0;
5967 fdh->elf.root.u.def.section = sym_sec;
5968 }
5969 opd_adjust[rel->r_offset / 8] = -1;
5970 }
5971 else
5972 {
5973 /* We'll be keeping this opd entry. */
5974
5975 if (fdh != NULL)
5976 {
5977 /* Redefine the function descriptor symbol to
5978 this location in the opd section. It is
5979 necessary to update the value here rather
5980 than using an array of adjustments as we do
5981 for local symbols, because various places
5982 in the generic ELF code use the value
5983 stored in u.def.value. */
5984 fdh->elf.root.u.def.value = wptr - new_contents;
5985 fdh->adjust_done = 1;
5986 }
5987
5988 /* Local syms are a bit tricky. We could
5989 tweak them as they can be cached, but
5990 we'd need to look through the local syms
5991 for the function descriptor sym which we
5992 don't have at the moment. So keep an
5993 array of adjustments. */
5994 opd_adjust[rel->r_offset / 8]
5995 = (wptr - new_contents) - (rptr - sec->contents);
5996
5997 if (wptr != rptr)
5998 memcpy (wptr, rptr, opd_ent_size);
5999 wptr += opd_ent_size;
6000 if (add_aux_fields && opd_ent_size == 16)
6001 {
6002 memset (wptr, '\0', 8);
6003 wptr += 8;
6004 }
6005 }
6006 rptr += opd_ent_size;
6007 offset += opd_ent_size;
6008 }
6009
6010 if (skip)
6011 {
6012 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
6013 if (info->shared)
6014 {
6015 /* We won't be needing dynamic relocs here. */
6016 struct ppc_dyn_relocs **pp;
6017 struct ppc_dyn_relocs *p;
6018
6019 if (h != NULL)
6020 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6021 else if (sym_sec != NULL)
6022 pp = ((struct ppc_dyn_relocs **)
6023 &elf_section_data (sym_sec)->local_dynrel);
6024 else
6025 pp = ((struct ppc_dyn_relocs **)
6026 &elf_section_data (sec)->local_dynrel);
6027 while ((p = *pp) != NULL)
6028 {
6029 if (p->sec == sec)
6030 {
6031 p->count -= 1;
6032 if (p->count == 0)
6033 *pp = p->next;
6034 break;
6035 }
6036 pp = &p->next;
6037 }
6038 }
6039 }
6040 else
6041 {
6042 /* We need to adjust any reloc offsets to point to the
6043 new opd entries. While we're at it, we may as well
6044 remove redundant relocs. */
6045 rel->r_offset += opd_adjust[(offset - opd_ent_size) / 8];
6046 if (write_rel != rel)
6047 memcpy (write_rel, rel, sizeof (*rel));
6048 ++write_rel;
6049 }
6050 }
6051
6052 sec->size = wptr - new_contents;
6053 sec->reloc_count = write_rel - relstart;
6054 if (add_aux_fields)
6055 {
6056 free (sec->contents);
6057 sec->contents = new_contents;
6058 }
6059
6060 /* Fudge the size too, as this is used later in
6061 elf_bfd_final_link if we are emitting relocs. */
6062 elf_section_data (sec)->rel_hdr.sh_size
6063 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6064 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6065 some_edited = TRUE;
6066 }
6067 else if (elf_section_data (sec)->relocs != relstart)
6068 free (relstart);
6069
6070 if (local_syms != NULL
6071 && symtab_hdr->contents != (unsigned char *) local_syms)
6072 {
6073 if (!info->keep_memory)
6074 free (local_syms);
6075 else
6076 symtab_hdr->contents = (unsigned char *) local_syms;
6077 }
6078 }
6079
6080 if (some_edited)
6081 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6082
6083 /* If we are doing a final link and the last .opd entry is just 16 byte
6084 long, add a 8 byte padding after it. */
6085 if (need_pad != NULL && !info->relocatable)
6086 {
6087 bfd_byte *p;
6088
6089 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6090 {
6091 BFD_ASSERT (need_pad->size > 0);
6092
6093 p = bfd_malloc (need_pad->size + 8);
6094 if (p == NULL)
6095 return FALSE;
6096
6097 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6098 p, 0, need_pad->size))
6099 return FALSE;
6100
6101 need_pad->contents = p;
6102 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6103 }
6104 else
6105 {
6106 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6107 if (p == NULL)
6108 return FALSE;
6109
6110 need_pad->contents = p;
6111 }
6112
6113 memset (need_pad->contents + need_pad->size, 0, 8);
6114 need_pad->size += 8;
6115 }
6116
6117 return TRUE;
6118 }
6119
6120 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6121
6122 asection *
6123 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6124 {
6125 struct ppc_link_hash_table *htab;
6126
6127 htab = ppc_hash_table (info);
6128 if (htab->tls_get_addr != NULL)
6129 {
6130 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6131
6132 while (h->elf.root.type == bfd_link_hash_indirect
6133 || h->elf.root.type == bfd_link_hash_warning)
6134 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6135
6136 htab->tls_get_addr = h;
6137
6138 if (htab->tls_get_addr_fd == NULL
6139 && h->oh != NULL
6140 && h->oh->is_func_descriptor)
6141 htab->tls_get_addr_fd = h->oh;
6142 }
6143
6144 if (htab->tls_get_addr_fd != NULL)
6145 {
6146 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6147
6148 while (h->elf.root.type == bfd_link_hash_indirect
6149 || h->elf.root.type == bfd_link_hash_warning)
6150 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6151
6152 htab->tls_get_addr_fd = h;
6153 }
6154
6155 return _bfd_elf_tls_setup (obfd, info);
6156 }
6157
6158 /* Run through all the TLS relocs looking for optimization
6159 opportunities. The linker has been hacked (see ppc64elf.em) to do
6160 a preliminary section layout so that we know the TLS segment
6161 offsets. We can't optimize earlier because some optimizations need
6162 to know the tp offset, and we need to optimize before allocating
6163 dynamic relocations. */
6164
6165 bfd_boolean
6166 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6167 {
6168 bfd *ibfd;
6169 asection *sec;
6170 struct ppc_link_hash_table *htab;
6171
6172 if (info->relocatable || info->shared)
6173 return TRUE;
6174
6175 htab = ppc_hash_table (info);
6176 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6177 {
6178 Elf_Internal_Sym *locsyms = NULL;
6179
6180 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6181 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6182 {
6183 Elf_Internal_Rela *relstart, *rel, *relend;
6184 int expecting_tls_get_addr;
6185
6186 /* Read the relocations. */
6187 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6188 info->keep_memory);
6189 if (relstart == NULL)
6190 return FALSE;
6191
6192 expecting_tls_get_addr = 0;
6193 relend = relstart + sec->reloc_count;
6194 for (rel = relstart; rel < relend; rel++)
6195 {
6196 enum elf_ppc64_reloc_type r_type;
6197 unsigned long r_symndx;
6198 struct elf_link_hash_entry *h;
6199 Elf_Internal_Sym *sym;
6200 asection *sym_sec;
6201 char *tls_mask;
6202 char tls_set, tls_clear, tls_type = 0;
6203 bfd_vma value;
6204 bfd_boolean ok_tprel, is_local;
6205
6206 r_symndx = ELF64_R_SYM (rel->r_info);
6207 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6208 r_symndx, ibfd))
6209 {
6210 err_free_rel:
6211 if (elf_section_data (sec)->relocs != relstart)
6212 free (relstart);
6213 if (locsyms != NULL
6214 && (elf_tdata (ibfd)->symtab_hdr.contents
6215 != (unsigned char *) locsyms))
6216 free (locsyms);
6217 return FALSE;
6218 }
6219
6220 if (h != NULL)
6221 {
6222 if (h->root.type != bfd_link_hash_defined
6223 && h->root.type != bfd_link_hash_defweak)
6224 continue;
6225 value = h->root.u.def.value;
6226 }
6227 else
6228 /* Symbols referenced by TLS relocs must be of type
6229 STT_TLS. So no need for .opd local sym adjust. */
6230 value = sym->st_value;
6231
6232 ok_tprel = FALSE;
6233 is_local = FALSE;
6234 if (h == NULL
6235 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
6236 {
6237 is_local = TRUE;
6238 value += sym_sec->output_offset;
6239 value += sym_sec->output_section->vma;
6240 value -= htab->elf.tls_sec->vma;
6241 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6242 < (bfd_vma) 1 << 32);
6243 }
6244
6245 r_type = ELF64_R_TYPE (rel->r_info);
6246 switch (r_type)
6247 {
6248 case R_PPC64_GOT_TLSLD16:
6249 case R_PPC64_GOT_TLSLD16_LO:
6250 case R_PPC64_GOT_TLSLD16_HI:
6251 case R_PPC64_GOT_TLSLD16_HA:
6252 /* These relocs should never be against a symbol
6253 defined in a shared lib. Leave them alone if
6254 that turns out to be the case. */
6255 ppc64_tlsld_got (ibfd)->refcount -= 1;
6256 if (!is_local)
6257 continue;
6258
6259 /* LD -> LE */
6260 tls_set = 0;
6261 tls_clear = TLS_LD;
6262 tls_type = TLS_TLS | TLS_LD;
6263 expecting_tls_get_addr = 1;
6264 break;
6265
6266 case R_PPC64_GOT_TLSGD16:
6267 case R_PPC64_GOT_TLSGD16_LO:
6268 case R_PPC64_GOT_TLSGD16_HI:
6269 case R_PPC64_GOT_TLSGD16_HA:
6270 if (ok_tprel)
6271 /* GD -> LE */
6272 tls_set = 0;
6273 else
6274 /* GD -> IE */
6275 tls_set = TLS_TLS | TLS_TPRELGD;
6276 tls_clear = TLS_GD;
6277 tls_type = TLS_TLS | TLS_GD;
6278 expecting_tls_get_addr = 1;
6279 break;
6280
6281 case R_PPC64_GOT_TPREL16_DS:
6282 case R_PPC64_GOT_TPREL16_LO_DS:
6283 case R_PPC64_GOT_TPREL16_HI:
6284 case R_PPC64_GOT_TPREL16_HA:
6285 expecting_tls_get_addr = 0;
6286 if (ok_tprel)
6287 {
6288 /* IE -> LE */
6289 tls_set = 0;
6290 tls_clear = TLS_TPREL;
6291 tls_type = TLS_TLS | TLS_TPREL;
6292 break;
6293 }
6294 else
6295 continue;
6296
6297 case R_PPC64_REL14:
6298 case R_PPC64_REL14_BRTAKEN:
6299 case R_PPC64_REL14_BRNTAKEN:
6300 case R_PPC64_REL24:
6301 if (h != NULL
6302 && (h == &htab->tls_get_addr->elf
6303 || h == &htab->tls_get_addr_fd->elf))
6304 {
6305 if (!expecting_tls_get_addr
6306 && rel != relstart
6307 && ((ELF64_R_TYPE (rel[-1].r_info)
6308 == R_PPC64_TOC16)
6309 || (ELF64_R_TYPE (rel[-1].r_info)
6310 == R_PPC64_TOC16_LO)))
6311 {
6312 /* Check for toc tls entries. */
6313 char *toc_tls;
6314 int retval;
6315
6316 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
6317 rel - 1, ibfd);
6318 if (retval == 0)
6319 goto err_free_rel;
6320 if (toc_tls != NULL)
6321 expecting_tls_get_addr = retval > 1;
6322 }
6323
6324 if (expecting_tls_get_addr)
6325 {
6326 struct plt_entry *ent;
6327 for (ent = h->plt.plist; ent; ent = ent->next)
6328 if (ent->addend == 0)
6329 {
6330 if (ent->plt.refcount > 0)
6331 ent->plt.refcount -= 1;
6332 break;
6333 }
6334 }
6335 }
6336 expecting_tls_get_addr = 0;
6337 continue;
6338
6339 case R_PPC64_TPREL64:
6340 expecting_tls_get_addr = 0;
6341 if (ok_tprel)
6342 {
6343 /* IE -> LE */
6344 tls_set = TLS_EXPLICIT;
6345 tls_clear = TLS_TPREL;
6346 break;
6347 }
6348 else
6349 continue;
6350
6351 case R_PPC64_DTPMOD64:
6352 expecting_tls_get_addr = 0;
6353 if (rel + 1 < relend
6354 && (rel[1].r_info
6355 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6356 && rel[1].r_offset == rel->r_offset + 8)
6357 {
6358 if (ok_tprel)
6359 /* GD -> LE */
6360 tls_set = TLS_EXPLICIT | TLS_GD;
6361 else
6362 /* GD -> IE */
6363 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6364 tls_clear = TLS_GD;
6365 }
6366 else
6367 {
6368 if (!is_local)
6369 continue;
6370
6371 /* LD -> LE */
6372 tls_set = TLS_EXPLICIT;
6373 tls_clear = TLS_LD;
6374 }
6375 break;
6376
6377 default:
6378 expecting_tls_get_addr = 0;
6379 continue;
6380 }
6381
6382 if ((tls_set & TLS_EXPLICIT) == 0)
6383 {
6384 struct got_entry *ent;
6385
6386 /* Adjust got entry for this reloc. */
6387 if (h != NULL)
6388 ent = h->got.glist;
6389 else
6390 ent = elf_local_got_ents (ibfd)[r_symndx];
6391
6392 for (; ent != NULL; ent = ent->next)
6393 if (ent->addend == rel->r_addend
6394 && ent->owner == ibfd
6395 && ent->tls_type == tls_type)
6396 break;
6397 if (ent == NULL)
6398 abort ();
6399
6400 if (tls_set == 0)
6401 {
6402 /* We managed to get rid of a got entry. */
6403 if (ent->got.refcount > 0)
6404 ent->got.refcount -= 1;
6405 }
6406 }
6407 else if (h != NULL)
6408 {
6409 struct ppc_link_hash_entry * eh;
6410 struct ppc_dyn_relocs **pp;
6411 struct ppc_dyn_relocs *p;
6412
6413 /* Adjust dynamic relocs. */
6414 eh = (struct ppc_link_hash_entry *) h;
6415 for (pp = &eh->dyn_relocs;
6416 (p = *pp) != NULL;
6417 pp = &p->next)
6418 if (p->sec == sec)
6419 {
6420 /* If we got rid of a DTPMOD/DTPREL reloc
6421 pair then we'll lose one or two dyn
6422 relocs. */
6423 if (tls_set == (TLS_EXPLICIT | TLS_GD))
6424 p->count -= 1;
6425 p->count -= 1;
6426 if (p->count == 0)
6427 *pp = p->next;
6428 break;
6429 }
6430 }
6431
6432 *tls_mask |= tls_set;
6433 *tls_mask &= ~tls_clear;
6434 }
6435
6436 if (elf_section_data (sec)->relocs != relstart)
6437 free (relstart);
6438 }
6439
6440 if (locsyms != NULL
6441 && (elf_tdata (ibfd)->symtab_hdr.contents
6442 != (unsigned char *) locsyms))
6443 {
6444 if (!info->keep_memory)
6445 free (locsyms);
6446 else
6447 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
6448 }
6449 }
6450 return TRUE;
6451 }
6452
6453 /* Allocate space in .plt, .got and associated reloc sections for
6454 dynamic relocs. */
6455
6456 static bfd_boolean
6457 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6458 {
6459 struct bfd_link_info *info;
6460 struct ppc_link_hash_table *htab;
6461 asection *s;
6462 struct ppc_link_hash_entry *eh;
6463 struct ppc_dyn_relocs *p;
6464 struct got_entry *gent;
6465
6466 if (h->root.type == bfd_link_hash_indirect)
6467 return TRUE;
6468
6469 if (h->root.type == bfd_link_hash_warning)
6470 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6471
6472 info = (struct bfd_link_info *) inf;
6473 htab = ppc_hash_table (info);
6474
6475 if (htab->elf.dynamic_sections_created
6476 && h->dynindx != -1
6477 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
6478 {
6479 struct plt_entry *pent;
6480 bfd_boolean doneone = FALSE;
6481 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
6482 if (pent->plt.refcount > 0)
6483 {
6484 /* If this is the first .plt entry, make room for the special
6485 first entry. */
6486 s = htab->plt;
6487 if (s->size == 0)
6488 s->size += PLT_INITIAL_ENTRY_SIZE;
6489
6490 pent->plt.offset = s->size;
6491
6492 /* Make room for this entry. */
6493 s->size += PLT_ENTRY_SIZE;
6494
6495 /* Make room for the .glink code. */
6496 s = htab->glink;
6497 if (s->size == 0)
6498 s->size += GLINK_CALL_STUB_SIZE;
6499 /* We need bigger stubs past index 32767. */
6500 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
6501 s->size += 4;
6502 s->size += 2*4;
6503
6504 /* We also need to make an entry in the .rela.plt section. */
6505 s = htab->relplt;
6506 s->size += sizeof (Elf64_External_Rela);
6507 doneone = TRUE;
6508 }
6509 else
6510 pent->plt.offset = (bfd_vma) -1;
6511 if (!doneone)
6512 {
6513 h->plt.plist = NULL;
6514 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
6515 }
6516 }
6517 else
6518 {
6519 h->plt.plist = NULL;
6520 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
6521 }
6522
6523 eh = (struct ppc_link_hash_entry *) h;
6524 /* Run through the TLS GD got entries first if we're changing them
6525 to TPREL. */
6526 if ((eh->tls_mask & TLS_TPRELGD) != 0)
6527 for (gent = h->got.glist; gent != NULL; gent = gent->next)
6528 if (gent->got.refcount > 0
6529 && (gent->tls_type & TLS_GD) != 0)
6530 {
6531 /* This was a GD entry that has been converted to TPREL. If
6532 there happens to be a TPREL entry we can use that one. */
6533 struct got_entry *ent;
6534 for (ent = h->got.glist; ent != NULL; ent = ent->next)
6535 if (ent->got.refcount > 0
6536 && (ent->tls_type & TLS_TPREL) != 0
6537 && ent->addend == gent->addend
6538 && ent->owner == gent->owner)
6539 {
6540 gent->got.refcount = 0;
6541 break;
6542 }
6543
6544 /* If not, then we'll be using our own TPREL entry. */
6545 if (gent->got.refcount != 0)
6546 gent->tls_type = TLS_TLS | TLS_TPREL;
6547 }
6548
6549 for (gent = h->got.glist; gent != NULL; gent = gent->next)
6550 if (gent->got.refcount > 0)
6551 {
6552 bfd_boolean dyn;
6553
6554 /* Make sure this symbol is output as a dynamic symbol.
6555 Undefined weak syms won't yet be marked as dynamic,
6556 nor will all TLS symbols. */
6557 if (h->dynindx == -1
6558 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
6559 {
6560 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6561 return FALSE;
6562 }
6563
6564 if ((gent->tls_type & TLS_LD) != 0
6565 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
6566 {
6567 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
6568 continue;
6569 }
6570
6571 s = ppc64_elf_tdata (gent->owner)->got;
6572 gent->got.offset = s->size;
6573 s->size
6574 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
6575 dyn = htab->elf.dynamic_sections_created;
6576 if ((info->shared
6577 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
6578 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6579 || h->root.type != bfd_link_hash_undefweak))
6580 ppc64_elf_tdata (gent->owner)->relgot->size
6581 += (gent->tls_type & eh->tls_mask & TLS_GD
6582 ? 2 * sizeof (Elf64_External_Rela)
6583 : sizeof (Elf64_External_Rela));
6584 }
6585 else
6586 gent->got.offset = (bfd_vma) -1;
6587
6588 if (eh->dyn_relocs == NULL)
6589 return TRUE;
6590
6591 /* In the shared -Bsymbolic case, discard space allocated for
6592 dynamic pc-relative relocs against symbols which turn out to be
6593 defined in regular objects. For the normal shared case, discard
6594 space for relocs that have become local due to symbol visibility
6595 changes. */
6596
6597 if (info->shared)
6598 {
6599 /* Relocs that use pc_count are those that appear on a call insn,
6600 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
6601 generated via assembly. We want calls to protected symbols to
6602 resolve directly to the function rather than going via the plt.
6603 If people want function pointer comparisons to work as expected
6604 then they should avoid writing weird assembly. */
6605 if (SYMBOL_CALLS_LOCAL (info, h))
6606 {
6607 struct ppc_dyn_relocs **pp;
6608
6609 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6610 {
6611 p->count -= p->pc_count;
6612 p->pc_count = 0;
6613 if (p->count == 0)
6614 *pp = p->next;
6615 else
6616 pp = &p->next;
6617 }
6618 }
6619
6620 /* Also discard relocs on undefined weak syms with non-default
6621 visibility. */
6622 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6623 && h->root.type == bfd_link_hash_undefweak)
6624 eh->dyn_relocs = NULL;
6625 }
6626 else if (ELIMINATE_COPY_RELOCS)
6627 {
6628 /* For the non-shared case, discard space for relocs against
6629 symbols which turn out to need copy relocs or are not
6630 dynamic. */
6631
6632 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
6633 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
6634 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
6635 {
6636 /* Make sure this symbol is output as a dynamic symbol.
6637 Undefined weak syms won't yet be marked as dynamic. */
6638 if (h->dynindx == -1
6639 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
6640 {
6641 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6642 return FALSE;
6643 }
6644
6645 /* If that succeeded, we know we'll be keeping all the
6646 relocs. */
6647 if (h->dynindx != -1)
6648 goto keep;
6649 }
6650
6651 eh->dyn_relocs = NULL;
6652
6653 keep: ;
6654 }
6655
6656 /* Finally, allocate space. */
6657 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6658 {
6659 asection *sreloc = elf_section_data (p->sec)->sreloc;
6660 sreloc->size += p->count * sizeof (Elf64_External_Rela);
6661 }
6662
6663 return TRUE;
6664 }
6665
6666 /* Find any dynamic relocs that apply to read-only sections. */
6667
6668 static bfd_boolean
6669 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6670 {
6671 struct ppc_link_hash_entry *eh;
6672 struct ppc_dyn_relocs *p;
6673
6674 if (h->root.type == bfd_link_hash_warning)
6675 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6676
6677 eh = (struct ppc_link_hash_entry *) h;
6678 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6679 {
6680 asection *s = p->sec->output_section;
6681
6682 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6683 {
6684 struct bfd_link_info *info = inf;
6685
6686 info->flags |= DF_TEXTREL;
6687
6688 /* Not an error, just cut short the traversal. */
6689 return FALSE;
6690 }
6691 }
6692 return TRUE;
6693 }
6694
6695 /* Set the sizes of the dynamic sections. */
6696
6697 static bfd_boolean
6698 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6699 struct bfd_link_info *info)
6700 {
6701 struct ppc_link_hash_table *htab;
6702 bfd *dynobj;
6703 asection *s;
6704 bfd_boolean relocs;
6705 bfd *ibfd;
6706
6707 htab = ppc_hash_table (info);
6708 dynobj = htab->elf.dynobj;
6709 if (dynobj == NULL)
6710 abort ();
6711
6712 if (htab->elf.dynamic_sections_created)
6713 {
6714 /* Set the contents of the .interp section to the interpreter. */
6715 if (info->executable)
6716 {
6717 s = bfd_get_section_by_name (dynobj, ".interp");
6718 if (s == NULL)
6719 abort ();
6720 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6721 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6722 }
6723 }
6724
6725 /* Set up .got offsets for local syms, and space for local dynamic
6726 relocs. */
6727 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6728 {
6729 struct got_entry **lgot_ents;
6730 struct got_entry **end_lgot_ents;
6731 char *lgot_masks;
6732 bfd_size_type locsymcount;
6733 Elf_Internal_Shdr *symtab_hdr;
6734 asection *srel;
6735
6736 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
6737 continue;
6738
6739 if (ppc64_tlsld_got (ibfd)->refcount > 0)
6740 {
6741 s = ppc64_elf_tdata (ibfd)->got;
6742 ppc64_tlsld_got (ibfd)->offset = s->size;
6743 s->size += 16;
6744 if (info->shared)
6745 {
6746 srel = ppc64_elf_tdata (ibfd)->relgot;
6747 srel->size += sizeof (Elf64_External_Rela);
6748 }
6749 }
6750 else
6751 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
6752
6753 for (s = ibfd->sections; s != NULL; s = s->next)
6754 {
6755 struct ppc_dyn_relocs *p;
6756
6757 for (p = *((struct ppc_dyn_relocs **)
6758 &elf_section_data (s)->local_dynrel);
6759 p != NULL;
6760 p = p->next)
6761 {
6762 if (!bfd_is_abs_section (p->sec)
6763 && bfd_is_abs_section (p->sec->output_section))
6764 {
6765 /* Input section has been discarded, either because
6766 it is a copy of a linkonce section or due to
6767 linker script /DISCARD/, so we'll be discarding
6768 the relocs too. */
6769 }
6770 else if (p->count != 0)
6771 {
6772 srel = elf_section_data (p->sec)->sreloc;
6773 srel->size += p->count * sizeof (Elf64_External_Rela);
6774 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
6775 info->flags |= DF_TEXTREL;
6776 }
6777 }
6778 }
6779
6780 lgot_ents = elf_local_got_ents (ibfd);
6781 if (!lgot_ents)
6782 continue;
6783
6784 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
6785 locsymcount = symtab_hdr->sh_info;
6786 end_lgot_ents = lgot_ents + locsymcount;
6787 lgot_masks = (char *) end_lgot_ents;
6788 s = ppc64_elf_tdata (ibfd)->got;
6789 srel = ppc64_elf_tdata (ibfd)->relgot;
6790 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
6791 {
6792 struct got_entry *ent;
6793
6794 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
6795 if (ent->got.refcount > 0)
6796 {
6797 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
6798 {
6799 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
6800 {
6801 ppc64_tlsld_got (ibfd)->offset = s->size;
6802 s->size += 16;
6803 if (info->shared)
6804 srel->size += sizeof (Elf64_External_Rela);
6805 }
6806 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
6807 }
6808 else
6809 {
6810 ent->got.offset = s->size;
6811 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
6812 {
6813 s->size += 16;
6814 if (info->shared)
6815 srel->size += 2 * sizeof (Elf64_External_Rela);
6816 }
6817 else
6818 {
6819 s->size += 8;
6820 if (info->shared)
6821 srel->size += sizeof (Elf64_External_Rela);
6822 }
6823 }
6824 }
6825 else
6826 ent->got.offset = (bfd_vma) -1;
6827 }
6828 }
6829
6830 /* Allocate global sym .plt and .got entries, and space for global
6831 sym dynamic relocs. */
6832 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
6833
6834 /* We now have determined the sizes of the various dynamic sections.
6835 Allocate memory for them. */
6836 relocs = FALSE;
6837 for (s = dynobj->sections; s != NULL; s = s->next)
6838 {
6839 if ((s->flags & SEC_LINKER_CREATED) == 0)
6840 continue;
6841
6842 if (s == htab->brlt || s == htab->relbrlt)
6843 /* These haven't been allocated yet; don't strip. */
6844 continue;
6845 else if (s == htab->got
6846 || s == htab->plt
6847 || s == htab->glink)
6848 {
6849 /* Strip this section if we don't need it; see the
6850 comment below. */
6851 }
6852 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
6853 {
6854 if (s->size == 0)
6855 {
6856 /* If we don't need this section, strip it from the
6857 output file. This is mostly to handle .rela.bss and
6858 .rela.plt. We must create both sections in
6859 create_dynamic_sections, because they must be created
6860 before the linker maps input sections to output
6861 sections. The linker does that before
6862 adjust_dynamic_symbol is called, and it is that
6863 function which decides whether anything needs to go
6864 into these sections. */
6865 }
6866 else
6867 {
6868 if (s != htab->relplt)
6869 relocs = TRUE;
6870
6871 /* We use the reloc_count field as a counter if we need
6872 to copy relocs into the output file. */
6873 s->reloc_count = 0;
6874 }
6875 }
6876 else
6877 {
6878 /* It's not one of our sections, so don't allocate space. */
6879 continue;
6880 }
6881
6882 if (s->size == 0)
6883 {
6884 _bfd_strip_section_from_output (info, s);
6885 continue;
6886 }
6887
6888 /* .plt is in the bss section. We don't initialise it. */
6889 if (s == htab->plt)
6890 continue;
6891
6892 /* Allocate memory for the section contents. We use bfd_zalloc
6893 here in case unused entries are not reclaimed before the
6894 section's contents are written out. This should not happen,
6895 but this way if it does we get a R_PPC64_NONE reloc in .rela
6896 sections instead of garbage.
6897 We also rely on the section contents being zero when writing
6898 the GOT. */
6899 s->contents = bfd_zalloc (dynobj, s->size);
6900 if (s->contents == NULL)
6901 return FALSE;
6902 }
6903
6904 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6905 {
6906 s = ppc64_elf_tdata (ibfd)->got;
6907 if (s != NULL && s != htab->got)
6908 {
6909 if (s->size == 0)
6910 _bfd_strip_section_from_output (info, s);
6911 else
6912 {
6913 s->contents = bfd_zalloc (ibfd, s->size);
6914 if (s->contents == NULL)
6915 return FALSE;
6916 }
6917 }
6918 s = ppc64_elf_tdata (ibfd)->relgot;
6919 if (s != NULL)
6920 {
6921 if (s->size == 0)
6922 _bfd_strip_section_from_output (info, s);
6923 else
6924 {
6925 s->contents = bfd_zalloc (ibfd, s->size);
6926 if (s->contents == NULL)
6927 return FALSE;
6928 relocs = TRUE;
6929 s->reloc_count = 0;
6930 }
6931 }
6932 }
6933
6934 if (htab->elf.dynamic_sections_created)
6935 {
6936 /* Add some entries to the .dynamic section. We fill in the
6937 values later, in ppc64_elf_finish_dynamic_sections, but we
6938 must add the entries now so that we get the correct size for
6939 the .dynamic section. The DT_DEBUG entry is filled in by the
6940 dynamic linker and used by the debugger. */
6941 #define add_dynamic_entry(TAG, VAL) \
6942 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6943
6944 if (info->executable)
6945 {
6946 if (!add_dynamic_entry (DT_DEBUG, 0))
6947 return FALSE;
6948 }
6949
6950 if (htab->plt != NULL && htab->plt->size != 0)
6951 {
6952 if (!add_dynamic_entry (DT_PLTGOT, 0)
6953 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6954 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6955 || !add_dynamic_entry (DT_JMPREL, 0)
6956 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6957 return FALSE;
6958 }
6959
6960 if (NO_OPD_RELOCS)
6961 {
6962 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6963 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6964 return FALSE;
6965 }
6966
6967 if (relocs)
6968 {
6969 if (!add_dynamic_entry (DT_RELA, 0)
6970 || !add_dynamic_entry (DT_RELASZ, 0)
6971 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6972 return FALSE;
6973
6974 /* If any dynamic relocs apply to a read-only section,
6975 then we need a DT_TEXTREL entry. */
6976 if ((info->flags & DF_TEXTREL) == 0)
6977 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6978
6979 if ((info->flags & DF_TEXTREL) != 0)
6980 {
6981 if (!add_dynamic_entry (DT_TEXTREL, 0))
6982 return FALSE;
6983 }
6984 }
6985 }
6986 #undef add_dynamic_entry
6987
6988 return TRUE;
6989 }
6990
6991 /* Determine the type of stub needed, if any, for a call. */
6992
6993 static inline enum ppc_stub_type
6994 ppc_type_of_stub (asection *input_sec,
6995 const Elf_Internal_Rela *rel,
6996 struct ppc_link_hash_entry **hash,
6997 bfd_vma destination)
6998 {
6999 struct ppc_link_hash_entry *h = *hash;
7000 bfd_vma location;
7001 bfd_vma branch_offset;
7002 bfd_vma max_branch_offset;
7003 enum elf_ppc64_reloc_type r_type;
7004
7005 if (h != NULL)
7006 {
7007 if (h->oh != NULL
7008 && h->oh->is_func_descriptor)
7009 h = h->oh;
7010
7011 if (h->elf.dynindx != -1)
7012 {
7013 struct plt_entry *ent;
7014
7015 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
7016 if (ent->addend == rel->r_addend
7017 && ent->plt.offset != (bfd_vma) -1)
7018 {
7019 *hash = h;
7020 return ppc_stub_plt_call;
7021 }
7022 }
7023
7024 if (!(h->elf.root.type == bfd_link_hash_defined
7025 || h->elf.root.type == bfd_link_hash_defweak)
7026 || h->elf.root.u.def.section->output_section == NULL)
7027 return ppc_stub_none;
7028 }
7029
7030 /* Determine where the call point is. */
7031 location = (input_sec->output_offset
7032 + input_sec->output_section->vma
7033 + rel->r_offset);
7034
7035 branch_offset = destination - location;
7036 r_type = ELF64_R_TYPE (rel->r_info);
7037
7038 /* Determine if a long branch stub is needed. */
7039 max_branch_offset = 1 << 25;
7040 if (r_type != R_PPC64_REL24)
7041 max_branch_offset = 1 << 15;
7042
7043 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
7044 /* We need a stub. Figure out whether a long_branch or plt_branch
7045 is needed later. */
7046 return ppc_stub_long_branch;
7047
7048 return ppc_stub_none;
7049 }
7050
7051 /* Build a .plt call stub. */
7052
7053 static inline bfd_byte *
7054 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
7055 {
7056 #define PPC_LO(v) ((v) & 0xffff)
7057 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7058 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7059
7060 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
7061 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
7062 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7063 if (PPC_HA (offset + 8) != PPC_HA (offset))
7064 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7065 offset += 8;
7066 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
7067 if (PPC_HA (offset + 8) != PPC_HA (offset))
7068 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
7069 offset += 8;
7070 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
7071 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
7072 bfd_put_32 (obfd, BCTR, p), p += 4;
7073 return p;
7074 }
7075
7076 static bfd_boolean
7077 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7078 {
7079 struct ppc_stub_hash_entry *stub_entry;
7080 struct ppc_branch_hash_entry *br_entry;
7081 struct bfd_link_info *info;
7082 struct ppc_link_hash_table *htab;
7083 bfd_byte *loc;
7084 bfd_byte *p;
7085 unsigned int indx;
7086 struct plt_entry *ent;
7087 bfd_vma off;
7088 int size;
7089
7090 /* Massage our args to the form they really have. */
7091 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7092 info = in_arg;
7093
7094 htab = ppc_hash_table (info);
7095
7096 /* Make a note of the offset within the stubs for this entry. */
7097 stub_entry->stub_offset = stub_entry->stub_sec->size;
7098 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
7099
7100 htab->stub_count[stub_entry->stub_type - 1] += 1;
7101 switch (stub_entry->stub_type)
7102 {
7103 case ppc_stub_long_branch:
7104 case ppc_stub_long_branch_r2off:
7105 /* Branches are relative. This is where we are going to. */
7106 off = (stub_entry->target_value
7107 + stub_entry->target_section->output_offset
7108 + stub_entry->target_section->output_section->vma);
7109
7110 /* And this is where we are coming from. */
7111 off -= (stub_entry->stub_offset
7112 + stub_entry->stub_sec->output_offset
7113 + stub_entry->stub_sec->output_section->vma);
7114
7115 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
7116 size = 4;
7117 else
7118 {
7119 bfd_vma r2off;
7120
7121 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7122 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7123 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7124 loc += 4;
7125 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7126 loc += 4;
7127 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7128 loc += 4;
7129 off -= 12;
7130 size = 16;
7131 }
7132 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
7133
7134 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
7135 break;
7136
7137 case ppc_stub_plt_branch:
7138 case ppc_stub_plt_branch_r2off:
7139 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7140 stub_entry->root.string + 9,
7141 FALSE, FALSE);
7142 if (br_entry == NULL)
7143 {
7144 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
7145 stub_entry->root.string + 9);
7146 htab->stub_error = TRUE;
7147 return FALSE;
7148 }
7149
7150 off = (stub_entry->target_value
7151 + stub_entry->target_section->output_offset
7152 + stub_entry->target_section->output_section->vma);
7153
7154 bfd_put_64 (htab->brlt->owner, off,
7155 htab->brlt->contents + br_entry->offset);
7156
7157 if (info->shared)
7158 {
7159 /* Create a reloc for the branch lookup table entry. */
7160 Elf_Internal_Rela rela;
7161 bfd_byte *rl;
7162
7163 rela.r_offset = (br_entry->offset
7164 + htab->brlt->output_offset
7165 + htab->brlt->output_section->vma);
7166 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
7167 rela.r_addend = off;
7168
7169 rl = htab->relbrlt->contents;
7170 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
7171 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
7172 }
7173
7174 off = (br_entry->offset
7175 + htab->brlt->output_offset
7176 + htab->brlt->output_section->vma
7177 - elf_gp (htab->brlt->output_section->owner)
7178 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7179
7180 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7181 {
7182 (*_bfd_error_handler)
7183 (_("linkage table error against `%s'"),
7184 stub_entry->root.string);
7185 bfd_set_error (bfd_error_bad_value);
7186 htab->stub_error = TRUE;
7187 return FALSE;
7188 }
7189
7190 indx = off;
7191 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
7192 {
7193 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7194 loc += 4;
7195 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7196 size = 16;
7197 }
7198 else
7199 {
7200 bfd_vma r2off;
7201
7202 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
7203 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7204 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
7205 loc += 4;
7206 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
7207 loc += 4;
7208 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
7209 loc += 4;
7210 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
7211 loc += 4;
7212 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
7213 size = 28;
7214 }
7215 loc += 4;
7216 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
7217 loc += 4;
7218 bfd_put_32 (htab->stub_bfd, BCTR, loc);
7219 break;
7220
7221 case ppc_stub_plt_call:
7222 /* Do the best we can for shared libraries built without
7223 exporting ".foo" for each "foo". This can happen when symbol
7224 versioning scripts strip all bar a subset of symbols. */
7225 if (stub_entry->h->oh != NULL
7226 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
7227 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
7228 {
7229 /* Point the symbol at the stub. There may be multiple stubs,
7230 we don't really care; The main thing is to make this sym
7231 defined somewhere. Maybe defining the symbol in the stub
7232 section is a silly idea. If we didn't do this, htab->top_id
7233 could disappear. */
7234 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
7235 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
7236 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
7237 }
7238
7239 /* Now build the stub. */
7240 off = (bfd_vma) -1;
7241 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7242 if (ent->addend == stub_entry->addend)
7243 {
7244 off = ent->plt.offset;
7245 break;
7246 }
7247 if (off >= (bfd_vma) -2)
7248 abort ();
7249
7250 off &= ~ (bfd_vma) 1;
7251 off += (htab->plt->output_offset
7252 + htab->plt->output_section->vma
7253 - elf_gp (htab->plt->output_section->owner)
7254 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7255
7256 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
7257 {
7258 (*_bfd_error_handler)
7259 (_("linkage table error against `%s'"),
7260 stub_entry->h->elf.root.root.string);
7261 bfd_set_error (bfd_error_bad_value);
7262 htab->stub_error = TRUE;
7263 return FALSE;
7264 }
7265
7266 p = build_plt_stub (htab->stub_bfd, loc, off);
7267 size = p - loc;
7268 break;
7269
7270 default:
7271 BFD_FAIL ();
7272 return FALSE;
7273 }
7274
7275 stub_entry->stub_sec->size += size;
7276
7277 if (htab->emit_stub_syms
7278 && !(stub_entry->stub_type == ppc_stub_plt_call
7279 && stub_entry->h->oh != NULL
7280 && stub_entry->h->oh->elf.root.type == bfd_link_hash_defined
7281 && stub_entry->h->oh->elf.root.u.def.section == stub_entry->stub_sec
7282 && stub_entry->h->oh->elf.root.u.def.value == stub_entry->stub_offset))
7283 {
7284 struct elf_link_hash_entry *h;
7285 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
7286 TRUE, FALSE, FALSE);
7287 if (h == NULL)
7288 return FALSE;
7289 if (h->root.type == bfd_link_hash_new)
7290 {
7291 h->root.type = bfd_link_hash_defined;
7292 h->root.u.def.section = stub_entry->stub_sec;
7293 h->root.u.def.value = stub_entry->stub_offset;
7294 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7295 | ELF_LINK_HASH_DEF_REGULAR
7296 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7297 | ELF_LINK_FORCED_LOCAL);
7298 }
7299 }
7300
7301 return TRUE;
7302 }
7303
7304 /* As above, but don't actually build the stub. Just bump offset so
7305 we know stub section sizes, and select plt_branch stubs where
7306 long_branch stubs won't do. */
7307
7308 static bfd_boolean
7309 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7310 {
7311 struct ppc_stub_hash_entry *stub_entry;
7312 struct bfd_link_info *info;
7313 struct ppc_link_hash_table *htab;
7314 bfd_vma off;
7315 int size;
7316
7317 /* Massage our args to the form they really have. */
7318 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
7319 info = in_arg;
7320
7321 htab = ppc_hash_table (info);
7322
7323 if (stub_entry->stub_type == ppc_stub_plt_call)
7324 {
7325 struct plt_entry *ent;
7326 off = (bfd_vma) -1;
7327 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
7328 if (ent->addend == stub_entry->addend)
7329 {
7330 off = ent->plt.offset & ~(bfd_vma) 1;
7331 break;
7332 }
7333 if (off >= (bfd_vma) -2)
7334 abort ();
7335 off += (htab->plt->output_offset
7336 + htab->plt->output_section->vma
7337 - elf_gp (htab->plt->output_section->owner)
7338 - htab->stub_group[stub_entry->id_sec->id].toc_off);
7339
7340 size = PLT_CALL_STUB_SIZE;
7341 if (PPC_HA (off + 16) != PPC_HA (off))
7342 size += 4;
7343 }
7344 else
7345 {
7346 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
7347 variants. */
7348 off = (stub_entry->target_value
7349 + stub_entry->target_section->output_offset
7350 + stub_entry->target_section->output_section->vma);
7351 off -= (stub_entry->stub_sec->size
7352 + stub_entry->stub_sec->output_offset
7353 + stub_entry->stub_sec->output_section->vma);
7354
7355 /* Reset the stub type from the plt variant in case we now
7356 can reach with a shorter stub. */
7357 if (stub_entry->stub_type >= ppc_stub_plt_branch)
7358 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
7359
7360 size = 4;
7361 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
7362 {
7363 off -= 12;
7364 size = 16;
7365 }
7366
7367 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
7368 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
7369 {
7370 struct ppc_branch_hash_entry *br_entry;
7371
7372 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
7373 stub_entry->root.string + 9,
7374 TRUE, FALSE);
7375 if (br_entry == NULL)
7376 {
7377 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
7378 stub_entry->root.string + 9);
7379 htab->stub_error = TRUE;
7380 return FALSE;
7381 }
7382
7383 if (br_entry->iter != htab->stub_iteration)
7384 {
7385 br_entry->iter = htab->stub_iteration;
7386 br_entry->offset = htab->brlt->size;
7387 htab->brlt->size += 8;
7388
7389 if (info->shared)
7390 htab->relbrlt->size += sizeof (Elf64_External_Rela);
7391 }
7392
7393 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
7394 size = 16;
7395 if (stub_entry->stub_type != ppc_stub_plt_branch)
7396 size = 28;
7397 }
7398 }
7399
7400 stub_entry->stub_sec->size += size;
7401 return TRUE;
7402 }
7403
7404 /* Set up various things so that we can make a list of input sections
7405 for each output section included in the link. Returns -1 on error,
7406 0 when no stubs will be needed, and 1 on success. */
7407
7408 int
7409 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
7410 {
7411 bfd *input_bfd;
7412 int top_id, top_index, id;
7413 asection *section;
7414 asection **input_list;
7415 bfd_size_type amt;
7416 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7417
7418 if (htab->brlt == NULL)
7419 return 0;
7420
7421 /* Find the top input section id. */
7422 for (input_bfd = info->input_bfds, top_id = 3;
7423 input_bfd != NULL;
7424 input_bfd = input_bfd->link_next)
7425 {
7426 for (section = input_bfd->sections;
7427 section != NULL;
7428 section = section->next)
7429 {
7430 if (top_id < section->id)
7431 top_id = section->id;
7432 }
7433 }
7434
7435 htab->top_id = top_id;
7436 amt = sizeof (struct map_stub) * (top_id + 1);
7437 htab->stub_group = bfd_zmalloc (amt);
7438 if (htab->stub_group == NULL)
7439 return -1;
7440
7441 /* Set toc_off for com, und, abs and ind sections. */
7442 for (id = 0; id < 3; id++)
7443 htab->stub_group[id].toc_off = TOC_BASE_OFF;
7444
7445 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
7446
7447 /* We can't use output_bfd->section_count here to find the top output
7448 section index as some sections may have been removed, and
7449 _bfd_strip_section_from_output doesn't renumber the indices. */
7450 for (section = output_bfd->sections, top_index = 0;
7451 section != NULL;
7452 section = section->next)
7453 {
7454 if (top_index < section->index)
7455 top_index = section->index;
7456 }
7457
7458 htab->top_index = top_index;
7459 amt = sizeof (asection *) * (top_index + 1);
7460 input_list = bfd_zmalloc (amt);
7461 htab->input_list = input_list;
7462 if (input_list == NULL)
7463 return -1;
7464
7465 return 1;
7466 }
7467
7468 /* The linker repeatedly calls this function for each TOC input section
7469 and linker generated GOT section. Group input bfds such that the toc
7470 within a group is less than 64k in size. Will break with cute linker
7471 scripts that play games with dot in the output toc section. */
7472
7473 void
7474 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
7475 {
7476 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7477 bfd_vma addr = isec->output_offset + isec->output_section->vma;
7478 bfd_vma off = addr - htab->toc_curr;
7479
7480 if (off + isec->size > 0x10000)
7481 htab->toc_curr = addr;
7482
7483 elf_gp (isec->owner) = (htab->toc_curr
7484 - elf_gp (isec->output_section->owner)
7485 + TOC_BASE_OFF);
7486 }
7487
7488 /* Called after the last call to the above function. */
7489
7490 void
7491 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
7492 struct bfd_link_info *info)
7493 {
7494 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7495
7496 /* toc_curr tracks the TOC offset used for code sections below in
7497 ppc64_elf_next_input_section. Start off at 0x8000. */
7498 htab->toc_curr = TOC_BASE_OFF;
7499 }
7500
7501 /* No toc references were found in ISEC. If the code in ISEC makes no
7502 calls, then there's no need to use toc adjusting stubs when branching
7503 into ISEC. Actually, indirect calls from ISEC are OK as they will
7504 load r2. */
7505
7506 static int
7507 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
7508 {
7509 bfd_byte *contents;
7510 bfd_size_type i;
7511 int ret;
7512 int branch_ok;
7513
7514 /* We know none of our code bearing sections will need toc stubs. */
7515 if ((isec->flags & SEC_LINKER_CREATED) != 0)
7516 return 0;
7517
7518 if (isec->size == 0)
7519 return 0;
7520
7521 /* Hack for linux kernel. .fixup contains branches, but only back to
7522 the function that hit an exception. */
7523 branch_ok = strcmp (isec->name, ".fixup") == 0;
7524
7525 contents = elf_section_data (isec)->this_hdr.contents;
7526 if (contents == NULL)
7527 {
7528 if (!bfd_malloc_and_get_section (isec->owner, isec, &contents))
7529 {
7530 if (contents != NULL)
7531 free (contents);
7532 return -1;
7533 }
7534 if (info->keep_memory)
7535 elf_section_data (isec)->this_hdr.contents = contents;
7536 }
7537
7538 /* Code scan, because we don't necessarily have relocs on calls to
7539 static functions. */
7540 ret = 0;
7541 for (i = 0; i < isec->size; i += 4)
7542 {
7543 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
7544 /* Is this a branch? */
7545 if ((insn & (0x3f << 26)) == (18 << 26)
7546 /* If branch and link, it's a function call. */
7547 && ((insn & 1) != 0
7548 /* Sibling calls use a plain branch. I don't know a way
7549 of deciding whether a branch is really a sibling call. */
7550 || !branch_ok))
7551 {
7552 ret = 1;
7553 break;
7554 }
7555 }
7556
7557 if (elf_section_data (isec)->this_hdr.contents != contents)
7558 free (contents);
7559 return ret;
7560 }
7561
7562 /* The linker repeatedly calls this function for each input section,
7563 in the order that input sections are linked into output sections.
7564 Build lists of input sections to determine groupings between which
7565 we may insert linker stubs. */
7566
7567 bfd_boolean
7568 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
7569 {
7570 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7571 int ret;
7572
7573 if ((isec->output_section->flags & SEC_CODE) != 0
7574 && isec->output_section->index <= htab->top_index)
7575 {
7576 asection **list = htab->input_list + isec->output_section->index;
7577 /* Steal the link_sec pointer for our list. */
7578 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
7579 /* This happens to make the list in reverse order,
7580 which is what we want. */
7581 PREV_SEC (isec) = *list;
7582 *list = isec;
7583 }
7584
7585 /* If a code section has a function that uses the TOC then we need
7586 to use the right TOC (obviously). Also, make sure that .opd gets
7587 the correct TOC value for R_PPC64_TOC relocs that don't have or
7588 can't find their function symbol (shouldn't ever happen now). */
7589 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
7590 {
7591 if (elf_gp (isec->owner) != 0)
7592 htab->toc_curr = elf_gp (isec->owner);
7593 }
7594 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
7595 return FALSE;
7596 else
7597 isec->has_gp_reloc = ret;
7598
7599 /* Functions that don't use the TOC can belong in any TOC group.
7600 Use the last TOC base. This happens to make _init and _fini
7601 pasting work. */
7602 htab->stub_group[isec->id].toc_off = htab->toc_curr;
7603 return TRUE;
7604 }
7605
7606 /* See whether we can group stub sections together. Grouping stub
7607 sections may result in fewer stubs. More importantly, we need to
7608 put all .init* and .fini* stubs at the beginning of the .init or
7609 .fini output sections respectively, because glibc splits the
7610 _init and _fini functions into multiple parts. Putting a stub in
7611 the middle of a function is not a good idea. */
7612
7613 static void
7614 group_sections (struct ppc_link_hash_table *htab,
7615 bfd_size_type stub_group_size,
7616 bfd_boolean stubs_always_before_branch)
7617 {
7618 asection **list = htab->input_list + htab->top_index;
7619 do
7620 {
7621 asection *tail = *list;
7622 while (tail != NULL)
7623 {
7624 asection *curr;
7625 asection *prev;
7626 bfd_size_type total;
7627 bfd_boolean big_sec;
7628 bfd_vma curr_toc;
7629
7630 curr = tail;
7631 total = tail->size;
7632 big_sec = total >= stub_group_size;
7633 curr_toc = htab->stub_group[tail->id].toc_off;
7634
7635 while ((prev = PREV_SEC (curr)) != NULL
7636 && ((total += curr->output_offset - prev->output_offset)
7637 < stub_group_size)
7638 && htab->stub_group[prev->id].toc_off == curr_toc)
7639 curr = prev;
7640
7641 /* OK, the size from the start of CURR to the end is less
7642 than stub_group_size and thus can be handled by one stub
7643 section. (or the tail section is itself larger than
7644 stub_group_size, in which case we may be toast.) We
7645 should really be keeping track of the total size of stubs
7646 added here, as stubs contribute to the final output
7647 section size. That's a little tricky, and this way will
7648 only break if stubs added make the total size more than
7649 2^25, ie. for the default stub_group_size, if stubs total
7650 more than 2097152 bytes, or nearly 75000 plt call stubs. */
7651 do
7652 {
7653 prev = PREV_SEC (tail);
7654 /* Set up this stub group. */
7655 htab->stub_group[tail->id].link_sec = curr;
7656 }
7657 while (tail != curr && (tail = prev) != NULL);
7658
7659 /* But wait, there's more! Input sections up to stub_group_size
7660 bytes before the stub section can be handled by it too.
7661 Don't do this if we have a really large section after the
7662 stubs, as adding more stubs increases the chance that
7663 branches may not reach into the stub section. */
7664 if (!stubs_always_before_branch && !big_sec)
7665 {
7666 total = 0;
7667 while (prev != NULL
7668 && ((total += tail->output_offset - prev->output_offset)
7669 < stub_group_size)
7670 && htab->stub_group[prev->id].toc_off == curr_toc)
7671 {
7672 tail = prev;
7673 prev = PREV_SEC (tail);
7674 htab->stub_group[tail->id].link_sec = curr;
7675 }
7676 }
7677 tail = prev;
7678 }
7679 }
7680 while (list-- != htab->input_list);
7681 free (htab->input_list);
7682 #undef PREV_SEC
7683 }
7684
7685 /* Determine and set the size of the stub section for a final link.
7686
7687 The basic idea here is to examine all the relocations looking for
7688 PC-relative calls to a target that is unreachable with a "bl"
7689 instruction. */
7690
7691 bfd_boolean
7692 ppc64_elf_size_stubs (bfd *output_bfd,
7693 struct bfd_link_info *info,
7694 bfd_signed_vma group_size,
7695 asection *(*add_stub_section) (const char *, asection *),
7696 void (*layout_sections_again) (void))
7697 {
7698 bfd_size_type stub_group_size;
7699 bfd_boolean stubs_always_before_branch;
7700 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7701
7702 /* Stash our params away. */
7703 htab->add_stub_section = add_stub_section;
7704 htab->layout_sections_again = layout_sections_again;
7705 stubs_always_before_branch = group_size < 0;
7706 if (group_size < 0)
7707 stub_group_size = -group_size;
7708 else
7709 stub_group_size = group_size;
7710 if (stub_group_size == 1)
7711 {
7712 /* Default values. */
7713 if (stubs_always_before_branch)
7714 {
7715 stub_group_size = 0x1e00000;
7716 if (htab->has_14bit_branch)
7717 stub_group_size = 0x7800;
7718 }
7719 else
7720 {
7721 stub_group_size = 0x1c00000;
7722 if (htab->has_14bit_branch)
7723 stub_group_size = 0x7000;
7724 }
7725 }
7726
7727 group_sections (htab, stub_group_size, stubs_always_before_branch);
7728
7729 while (1)
7730 {
7731 bfd *input_bfd;
7732 unsigned int bfd_indx;
7733 asection *stub_sec;
7734 bfd_boolean stub_changed;
7735
7736 htab->stub_iteration += 1;
7737 stub_changed = FALSE;
7738
7739 for (input_bfd = info->input_bfds, bfd_indx = 0;
7740 input_bfd != NULL;
7741 input_bfd = input_bfd->link_next, bfd_indx++)
7742 {
7743 Elf_Internal_Shdr *symtab_hdr;
7744 asection *section;
7745 Elf_Internal_Sym *local_syms = NULL;
7746
7747 /* We'll need the symbol table in a second. */
7748 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7749 if (symtab_hdr->sh_info == 0)
7750 continue;
7751
7752 /* Walk over each section attached to the input bfd. */
7753 for (section = input_bfd->sections;
7754 section != NULL;
7755 section = section->next)
7756 {
7757 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
7758
7759 /* If there aren't any relocs, then there's nothing more
7760 to do. */
7761 if ((section->flags & SEC_RELOC) == 0
7762 || section->reloc_count == 0)
7763 continue;
7764
7765 /* If this section is a link-once section that will be
7766 discarded, then don't create any stubs. */
7767 if (section->output_section == NULL
7768 || section->output_section->owner != output_bfd)
7769 continue;
7770
7771 /* Get the relocs. */
7772 internal_relocs
7773 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
7774 info->keep_memory);
7775 if (internal_relocs == NULL)
7776 goto error_ret_free_local;
7777
7778 /* Now examine each relocation. */
7779 irela = internal_relocs;
7780 irelaend = irela + section->reloc_count;
7781 for (; irela < irelaend; irela++)
7782 {
7783 enum elf_ppc64_reloc_type r_type;
7784 unsigned int r_indx;
7785 enum ppc_stub_type stub_type;
7786 struct ppc_stub_hash_entry *stub_entry;
7787 asection *sym_sec, *code_sec;
7788 bfd_vma sym_value;
7789 bfd_vma destination;
7790 bfd_boolean ok_dest;
7791 struct ppc_link_hash_entry *hash;
7792 struct ppc_link_hash_entry *fdh;
7793 struct elf_link_hash_entry *h;
7794 Elf_Internal_Sym *sym;
7795 char *stub_name;
7796 const asection *id_sec;
7797 long *opd_adjust;
7798
7799 r_type = ELF64_R_TYPE (irela->r_info);
7800 r_indx = ELF64_R_SYM (irela->r_info);
7801
7802 if (r_type >= R_PPC64_max)
7803 {
7804 bfd_set_error (bfd_error_bad_value);
7805 goto error_ret_free_internal;
7806 }
7807
7808 /* Only look for stubs on branch instructions. */
7809 if (r_type != R_PPC64_REL24
7810 && r_type != R_PPC64_REL14
7811 && r_type != R_PPC64_REL14_BRTAKEN
7812 && r_type != R_PPC64_REL14_BRNTAKEN)
7813 continue;
7814
7815 /* Now determine the call target, its name, value,
7816 section. */
7817 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7818 r_indx, input_bfd))
7819 goto error_ret_free_internal;
7820 hash = (struct ppc_link_hash_entry *) h;
7821
7822 ok_dest = FALSE;
7823 fdh = NULL;
7824 if (hash == NULL)
7825 {
7826 sym_value = sym->st_value;
7827 ok_dest = TRUE;
7828 }
7829 else
7830 {
7831 sym_value = 0;
7832 /* Recognise an old ABI func code entry sym, and
7833 use the func descriptor sym instead. */
7834 if (hash->elf.root.type == bfd_link_hash_undefweak
7835 && hash->elf.root.root.string[0] == '.'
7836 && (fdh = get_fdh (hash, htab)) != NULL)
7837 {
7838 if (fdh->elf.root.type == bfd_link_hash_defined
7839 || fdh->elf.root.type == bfd_link_hash_defweak)
7840 {
7841 sym_sec = fdh->elf.root.u.def.section;
7842 sym_value = fdh->elf.root.u.def.value;
7843 if (sym_sec->output_section != NULL)
7844 ok_dest = TRUE;
7845 }
7846 else
7847 fdh = NULL;
7848 }
7849 else if (hash->elf.root.type == bfd_link_hash_defined
7850 || hash->elf.root.type == bfd_link_hash_defweak)
7851 {
7852 sym_value = hash->elf.root.u.def.value;
7853 if (sym_sec->output_section != NULL)
7854 ok_dest = TRUE;
7855 }
7856 else if (hash->elf.root.type == bfd_link_hash_undefweak)
7857 ;
7858 else if (hash->elf.root.type == bfd_link_hash_undefined)
7859 ;
7860 else
7861 {
7862 bfd_set_error (bfd_error_bad_value);
7863 goto error_ret_free_internal;
7864 }
7865 }
7866
7867 destination = 0;
7868 if (ok_dest)
7869 {
7870 sym_value += irela->r_addend;
7871 destination = (sym_value
7872 + sym_sec->output_offset
7873 + sym_sec->output_section->vma);
7874 }
7875
7876 code_sec = sym_sec;
7877 opd_adjust = get_opd_info (sym_sec);
7878 if (opd_adjust != NULL)
7879 {
7880 bfd_vma dest;
7881
7882 if (hash == NULL)
7883 {
7884 long adjust = opd_adjust[sym_value / 8];
7885 if (adjust == -1)
7886 continue;
7887 sym_value += adjust;
7888 }
7889 dest = opd_entry_value (sym_sec, sym_value,
7890 &code_sec, &sym_value);
7891 if (dest != (bfd_vma) -1)
7892 {
7893 destination = dest;
7894 if (fdh != NULL)
7895 {
7896 /* Fixup old ABI sym to point at code
7897 entry. */
7898 hash->elf.root.type = bfd_link_hash_defweak;
7899 hash->elf.root.u.def.section = code_sec;
7900 hash->elf.root.u.def.value = sym_value;
7901 }
7902 }
7903 }
7904
7905 /* Determine what (if any) linker stub is needed. */
7906 stub_type = ppc_type_of_stub (section, irela, &hash,
7907 destination);
7908
7909 if (stub_type != ppc_stub_plt_call)
7910 {
7911 /* Check whether we need a TOC adjusting stub.
7912 Since the linker pastes together pieces from
7913 different object files when creating the
7914 _init and _fini functions, it may be that a
7915 call to what looks like a local sym is in
7916 fact a call needing a TOC adjustment. */
7917 if (code_sec != NULL
7918 && code_sec->output_section != NULL
7919 && (htab->stub_group[code_sec->id].toc_off
7920 != htab->stub_group[section->id].toc_off)
7921 && code_sec->has_gp_reloc
7922 && section->has_gp_reloc)
7923 stub_type = ppc_stub_long_branch_r2off;
7924 }
7925
7926 if (stub_type == ppc_stub_none)
7927 continue;
7928
7929 /* __tls_get_addr calls might be eliminated. */
7930 if (stub_type != ppc_stub_plt_call
7931 && hash != NULL
7932 && (hash == htab->tls_get_addr
7933 || hash == htab->tls_get_addr_fd)
7934 && section->has_tls_reloc
7935 && irela != internal_relocs)
7936 {
7937 /* Get tls info. */
7938 char *tls_mask;
7939
7940 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
7941 irela - 1, input_bfd))
7942 goto error_ret_free_internal;
7943 if (*tls_mask != 0)
7944 continue;
7945 }
7946
7947 /* Support for grouping stub sections. */
7948 id_sec = htab->stub_group[section->id].link_sec;
7949
7950 /* Get the name of this stub. */
7951 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
7952 if (!stub_name)
7953 goto error_ret_free_internal;
7954
7955 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
7956 stub_name, FALSE, FALSE);
7957 if (stub_entry != NULL)
7958 {
7959 /* The proper stub has already been created. */
7960 free (stub_name);
7961 continue;
7962 }
7963
7964 stub_entry = ppc_add_stub (stub_name, section, htab);
7965 if (stub_entry == NULL)
7966 {
7967 free (stub_name);
7968 error_ret_free_internal:
7969 if (elf_section_data (section)->relocs == NULL)
7970 free (internal_relocs);
7971 error_ret_free_local:
7972 if (local_syms != NULL
7973 && (symtab_hdr->contents
7974 != (unsigned char *) local_syms))
7975 free (local_syms);
7976 return FALSE;
7977 }
7978
7979 stub_entry->stub_type = stub_type;
7980 stub_entry->target_value = sym_value;
7981 stub_entry->target_section = code_sec;
7982 stub_entry->h = hash;
7983 stub_entry->addend = irela->r_addend;
7984 stub_changed = TRUE;
7985 }
7986
7987 /* We're done with the internal relocs, free them. */
7988 if (elf_section_data (section)->relocs != internal_relocs)
7989 free (internal_relocs);
7990 }
7991
7992 if (local_syms != NULL
7993 && symtab_hdr->contents != (unsigned char *) local_syms)
7994 {
7995 if (!info->keep_memory)
7996 free (local_syms);
7997 else
7998 symtab_hdr->contents = (unsigned char *) local_syms;
7999 }
8000 }
8001
8002 if (!stub_changed)
8003 break;
8004
8005 /* OK, we've added some stubs. Find out the new size of the
8006 stub sections. */
8007 for (stub_sec = htab->stub_bfd->sections;
8008 stub_sec != NULL;
8009 stub_sec = stub_sec->next)
8010 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8011 stub_sec->size = 0;
8012
8013 htab->brlt->size = 0;
8014 if (info->shared)
8015 htab->relbrlt->size = 0;
8016
8017 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
8018
8019 /* Ask the linker to do its stuff. */
8020 (*htab->layout_sections_again) ();
8021 }
8022
8023 /* It would be nice to strip .branch_lt from the output if the
8024 section is empty, but it's too late. If we strip sections here,
8025 the dynamic symbol table is corrupted since the section symbol
8026 for the stripped section isn't written. */
8027
8028 return TRUE;
8029 }
8030
8031 /* Called after we have determined section placement. If sections
8032 move, we'll be called again. Provide a value for TOCstart. */
8033
8034 bfd_vma
8035 ppc64_elf_toc (bfd *obfd)
8036 {
8037 asection *s;
8038 bfd_vma TOCstart;
8039
8040 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
8041 order. The TOC starts where the first of these sections starts. */
8042 s = bfd_get_section_by_name (obfd, ".got");
8043 if (s == NULL)
8044 s = bfd_get_section_by_name (obfd, ".toc");
8045 if (s == NULL)
8046 s = bfd_get_section_by_name (obfd, ".tocbss");
8047 if (s == NULL)
8048 s = bfd_get_section_by_name (obfd, ".plt");
8049 if (s == NULL)
8050 {
8051 /* This may happen for
8052 o references to TOC base (SYM@toc / TOC[tc0]) without a
8053 .toc directive
8054 o bad linker script
8055 o --gc-sections and empty TOC sections
8056
8057 FIXME: Warn user? */
8058
8059 /* Look for a likely section. We probably won't even be
8060 using TOCstart. */
8061 for (s = obfd->sections; s != NULL; s = s->next)
8062 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
8063 == (SEC_ALLOC | SEC_SMALL_DATA))
8064 break;
8065 if (s == NULL)
8066 for (s = obfd->sections; s != NULL; s = s->next)
8067 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
8068 == (SEC_ALLOC | SEC_SMALL_DATA))
8069 break;
8070 if (s == NULL)
8071 for (s = obfd->sections; s != NULL; s = s->next)
8072 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
8073 break;
8074 if (s == NULL)
8075 for (s = obfd->sections; s != NULL; s = s->next)
8076 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
8077 break;
8078 }
8079
8080 TOCstart = 0;
8081 if (s != NULL)
8082 TOCstart = s->output_section->vma + s->output_offset;
8083
8084 return TOCstart;
8085 }
8086
8087 /* Build all the stubs associated with the current output file.
8088 The stubs are kept in a hash table attached to the main linker
8089 hash table. This function is called via gldelf64ppc_finish. */
8090
8091 bfd_boolean
8092 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
8093 struct bfd_link_info *info,
8094 char **stats)
8095 {
8096 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8097 asection *stub_sec;
8098 bfd_byte *p;
8099 int stub_sec_count = 0;
8100
8101 htab->emit_stub_syms = emit_stub_syms;
8102
8103 /* Allocate memory to hold the linker stubs. */
8104 for (stub_sec = htab->stub_bfd->sections;
8105 stub_sec != NULL;
8106 stub_sec = stub_sec->next)
8107 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
8108 && stub_sec->size != 0)
8109 {
8110 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
8111 if (stub_sec->contents == NULL)
8112 return FALSE;
8113 /* We want to check that built size is the same as calculated
8114 size. rawsize is a convenient location to use. */
8115 stub_sec->rawsize = stub_sec->size;
8116 stub_sec->size = 0;
8117 }
8118
8119 if (htab->plt != NULL)
8120 {
8121 unsigned int indx;
8122 bfd_vma plt0;
8123
8124 /* Build the .glink plt call stub. */
8125 plt0 = (htab->plt->output_section->vma
8126 + htab->plt->output_offset
8127 - (htab->glink->output_section->vma
8128 + htab->glink->output_offset
8129 + GLINK_CALL_STUB_SIZE));
8130 if (plt0 + 0x80008000 > 0xffffffff)
8131 {
8132 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
8133 bfd_set_error (bfd_error_bad_value);
8134 return FALSE;
8135 }
8136
8137 if (htab->emit_stub_syms)
8138 {
8139 struct elf_link_hash_entry *h;
8140 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
8141 if (h == NULL)
8142 return FALSE;
8143 if (h->root.type == bfd_link_hash_new)
8144 {
8145 h->root.type = bfd_link_hash_defined;
8146 h->root.u.def.section = htab->glink;
8147 h->root.u.def.value = 0;
8148 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
8149 | ELF_LINK_HASH_DEF_REGULAR
8150 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
8151 | ELF_LINK_FORCED_LOCAL);
8152 }
8153 }
8154 p = htab->glink->contents;
8155 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
8156 p += 4;
8157 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
8158 p += 4;
8159 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
8160 p += 4;
8161 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
8162 p += 4;
8163 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
8164 p += 4;
8165 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
8166 p += 4;
8167 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
8168 p += 4;
8169 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
8170 p += 4;
8171 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
8172 p += 4;
8173 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
8174 p += 4;
8175 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
8176 p += 4;
8177 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
8178 p += 4;
8179 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
8180 p += 4;
8181 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
8182 p += 4;
8183 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
8184 p += 4;
8185 bfd_put_32 (htab->glink->owner, BCTR, p);
8186 p += 4;
8187
8188 /* Build the .glink lazy link call stubs. */
8189 indx = 0;
8190 while (p < htab->glink->contents + htab->glink->size)
8191 {
8192 if (indx < 0x8000)
8193 {
8194 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
8195 p += 4;
8196 }
8197 else
8198 {
8199 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
8200 p += 4;
8201 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
8202 p += 4;
8203 }
8204 bfd_put_32 (htab->glink->owner,
8205 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
8206 indx++;
8207 p += 4;
8208 }
8209 htab->glink->rawsize = p - htab->glink->contents;
8210 }
8211
8212 if (htab->brlt->size != 0)
8213 {
8214 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
8215 htab->brlt->size);
8216 if (htab->brlt->contents == NULL)
8217 return FALSE;
8218 }
8219 if (info->shared && htab->relbrlt->size != 0)
8220 {
8221 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
8222 htab->relbrlt->size);
8223 if (htab->relbrlt->contents == NULL)
8224 return FALSE;
8225 }
8226
8227 /* Build the stubs as directed by the stub hash table. */
8228 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
8229
8230 for (stub_sec = htab->stub_bfd->sections;
8231 stub_sec != NULL;
8232 stub_sec = stub_sec->next)
8233 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
8234 {
8235 stub_sec_count += 1;
8236 if (stub_sec->rawsize != stub_sec->size)
8237 break;
8238 }
8239
8240 if (stub_sec != NULL
8241 || htab->glink->rawsize != htab->glink->size)
8242 {
8243 htab->stub_error = TRUE;
8244 (*_bfd_error_handler) (_("stubs don't match calculated size"));
8245 }
8246
8247 if (htab->stub_error)
8248 return FALSE;
8249
8250 if (stats != NULL)
8251 {
8252 *stats = bfd_malloc (500);
8253 if (*stats == NULL)
8254 return FALSE;
8255
8256 sprintf (*stats, _("linker stubs in %u groups\n"
8257 " branch %lu\n"
8258 " toc adjust %lu\n"
8259 " long branch %lu\n"
8260 " long toc adj %lu\n"
8261 " plt call %lu"),
8262 stub_sec_count,
8263 htab->stub_count[ppc_stub_long_branch - 1],
8264 htab->stub_count[ppc_stub_long_branch_r2off - 1],
8265 htab->stub_count[ppc_stub_plt_branch - 1],
8266 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
8267 htab->stub_count[ppc_stub_plt_call - 1]);
8268 }
8269 return TRUE;
8270 }
8271
8272 /* This function undoes the changes made by add_symbol_adjust. */
8273
8274 static bfd_boolean
8275 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
8276 {
8277 struct ppc_link_hash_entry *eh;
8278
8279 if (h->root.type == bfd_link_hash_indirect)
8280 return TRUE;
8281
8282 if (h->root.type == bfd_link_hash_warning)
8283 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8284
8285 eh = (struct ppc_link_hash_entry *) h;
8286 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
8287 return TRUE;
8288
8289 eh->elf.root.type = bfd_link_hash_undefined;
8290 return TRUE;
8291 }
8292
8293 void
8294 ppc64_elf_restore_symbols (struct bfd_link_info *info)
8295 {
8296 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8297 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
8298 }
8299
8300 /* The RELOCATE_SECTION function is called by the ELF backend linker
8301 to handle the relocations for a section.
8302
8303 The relocs are always passed as Rela structures; if the section
8304 actually uses Rel structures, the r_addend field will always be
8305 zero.
8306
8307 This function is responsible for adjust the section contents as
8308 necessary, and (if using Rela relocs and generating a
8309 relocatable output file) adjusting the reloc addend as
8310 necessary.
8311
8312 This function does not have to worry about setting the reloc
8313 address or the reloc symbol index.
8314
8315 LOCAL_SYMS is a pointer to the swapped in local symbols.
8316
8317 LOCAL_SECTIONS is an array giving the section in the input file
8318 corresponding to the st_shndx field of each local symbol.
8319
8320 The global hash table entry for the global symbols can be found
8321 via elf_sym_hashes (input_bfd).
8322
8323 When generating relocatable output, this function must handle
8324 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
8325 going to be the section symbol corresponding to the output
8326 section, which means that the addend must be adjusted
8327 accordingly. */
8328
8329 static bfd_boolean
8330 ppc64_elf_relocate_section (bfd *output_bfd,
8331 struct bfd_link_info *info,
8332 bfd *input_bfd,
8333 asection *input_section,
8334 bfd_byte *contents,
8335 Elf_Internal_Rela *relocs,
8336 Elf_Internal_Sym *local_syms,
8337 asection **local_sections)
8338 {
8339 struct ppc_link_hash_table *htab;
8340 Elf_Internal_Shdr *symtab_hdr;
8341 struct elf_link_hash_entry **sym_hashes;
8342 Elf_Internal_Rela *rel;
8343 Elf_Internal_Rela *relend;
8344 Elf_Internal_Rela outrel;
8345 bfd_byte *loc;
8346 struct got_entry **local_got_ents;
8347 bfd_vma TOCstart;
8348 bfd_boolean ret = TRUE;
8349 bfd_boolean is_opd;
8350 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
8351 bfd_boolean is_power4 = FALSE;
8352
8353 if (info->relocatable)
8354 return TRUE;
8355
8356 /* Initialize howto table if needed. */
8357 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8358 ppc_howto_init ();
8359
8360 htab = ppc_hash_table (info);
8361 local_got_ents = elf_local_got_ents (input_bfd);
8362 TOCstart = elf_gp (output_bfd);
8363 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
8364 sym_hashes = elf_sym_hashes (input_bfd);
8365 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
8366
8367 rel = relocs;
8368 relend = relocs + input_section->reloc_count;
8369 for (; rel < relend; rel++)
8370 {
8371 enum elf_ppc64_reloc_type r_type;
8372 bfd_vma addend;
8373 bfd_reloc_status_type r;
8374 Elf_Internal_Sym *sym;
8375 asection *sec;
8376 struct elf_link_hash_entry *h;
8377 struct elf_link_hash_entry *fdh;
8378 const char *sym_name;
8379 unsigned long r_symndx, toc_symndx;
8380 char tls_mask, tls_gd, tls_type;
8381 char sym_type;
8382 bfd_vma relocation;
8383 bfd_boolean unresolved_reloc;
8384 bfd_boolean warned;
8385 unsigned long insn, mask;
8386 struct ppc_stub_hash_entry *stub_entry;
8387 bfd_vma max_br_offset;
8388 bfd_vma from;
8389
8390 r_type = ELF64_R_TYPE (rel->r_info);
8391 r_symndx = ELF64_R_SYM (rel->r_info);
8392
8393 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
8394 symbol of the previous ADDR64 reloc. The symbol gives us the
8395 proper TOC base to use. */
8396 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
8397 && rel != relocs
8398 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
8399 && is_opd)
8400 r_symndx = ELF64_R_SYM (rel[-1].r_info);
8401
8402 sym = NULL;
8403 sec = NULL;
8404 h = NULL;
8405 sym_name = NULL;
8406 unresolved_reloc = FALSE;
8407 warned = FALSE;
8408
8409 if (r_symndx < symtab_hdr->sh_info)
8410 {
8411 /* It's a local symbol. */
8412 long *opd_adjust;
8413
8414 sym = local_syms + r_symndx;
8415 sec = local_sections[r_symndx];
8416 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
8417 sym_type = ELF64_ST_TYPE (sym->st_info);
8418 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8419 opd_adjust = get_opd_info (sec);
8420 if (opd_adjust != NULL)
8421 {
8422 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 8];
8423 if (adjust == -1)
8424 relocation = 0;
8425 else
8426 relocation += adjust;
8427 }
8428 }
8429 else
8430 {
8431 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8432 r_symndx, symtab_hdr, sym_hashes,
8433 h, sec, relocation,
8434 unresolved_reloc, warned);
8435 sym_name = h->root.root.string;
8436 sym_type = h->type;
8437 }
8438
8439 /* TLS optimizations. Replace instruction sequences and relocs
8440 based on information we collected in tls_optimize. We edit
8441 RELOCS so that --emit-relocs will output something sensible
8442 for the final instruction stream. */
8443 tls_mask = 0;
8444 tls_gd = 0;
8445 toc_symndx = 0;
8446 if (IS_PPC64_TLS_RELOC (r_type))
8447 {
8448 if (h != NULL)
8449 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
8450 else if (local_got_ents != NULL)
8451 {
8452 char *lgot_masks;
8453 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
8454 tls_mask = lgot_masks[r_symndx];
8455 }
8456 if (tls_mask == 0 && r_type == R_PPC64_TLS)
8457 {
8458 /* Check for toc tls entries. */
8459 char *toc_tls;
8460
8461 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
8462 rel, input_bfd))
8463 return FALSE;
8464
8465 if (toc_tls)
8466 tls_mask = *toc_tls;
8467 }
8468 }
8469
8470 /* Check that tls relocs are used with tls syms, and non-tls
8471 relocs are used with non-tls syms. */
8472 if (r_symndx != 0
8473 && r_type != R_PPC64_NONE
8474 && (h == NULL
8475 || h->root.type == bfd_link_hash_defined
8476 || h->root.type == bfd_link_hash_defweak)
8477 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
8478 {
8479 if (r_type == R_PPC64_TLS && tls_mask != 0)
8480 /* R_PPC64_TLS is OK against a symbol in the TOC. */
8481 ;
8482 else
8483 (*_bfd_error_handler)
8484 (sym_type == STT_TLS
8485 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
8486 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
8487 input_bfd,
8488 input_section,
8489 (long) rel->r_offset,
8490 ppc64_elf_howto_table[r_type]->name,
8491 sym_name);
8492 }
8493
8494 /* Ensure reloc mapping code below stays sane. */
8495 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
8496 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
8497 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
8498 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
8499 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
8500 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
8501 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
8502 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
8503 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
8504 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
8505 abort ();
8506
8507 switch (r_type)
8508 {
8509 default:
8510 break;
8511
8512 case R_PPC64_TOC16:
8513 case R_PPC64_TOC16_LO:
8514 case R_PPC64_TOC16_DS:
8515 case R_PPC64_TOC16_LO_DS:
8516 {
8517 /* Check for toc tls entries. */
8518 char *toc_tls;
8519 int retval;
8520
8521 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
8522 rel, input_bfd);
8523 if (retval == 0)
8524 return FALSE;
8525
8526 if (toc_tls)
8527 {
8528 tls_mask = *toc_tls;
8529 if (r_type == R_PPC64_TOC16_DS
8530 || r_type == R_PPC64_TOC16_LO_DS)
8531 {
8532 if (tls_mask != 0
8533 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
8534 goto toctprel;
8535 }
8536 else
8537 {
8538 /* If we found a GD reloc pair, then we might be
8539 doing a GD->IE transition. */
8540 if (retval == 2)
8541 {
8542 tls_gd = TLS_TPRELGD;
8543 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8544 goto tls_get_addr_check;
8545 }
8546 else if (retval == 3)
8547 {
8548 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8549 goto tls_get_addr_check;
8550 }
8551 }
8552 }
8553 }
8554 break;
8555
8556 case R_PPC64_GOT_TPREL16_DS:
8557 case R_PPC64_GOT_TPREL16_LO_DS:
8558 if (tls_mask != 0
8559 && (tls_mask & TLS_TPREL) == 0)
8560 {
8561 toctprel:
8562 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
8563 insn &= 31 << 21;
8564 insn |= 0x3c0d0000; /* addis 0,13,0 */
8565 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
8566 r_type = R_PPC64_TPREL16_HA;
8567 if (toc_symndx != 0)
8568 {
8569 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
8570 /* We changed the symbol. Start over in order to
8571 get h, sym, sec etc. right. */
8572 rel--;
8573 continue;
8574 }
8575 else
8576 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8577 }
8578 break;
8579
8580 case R_PPC64_TLS:
8581 if (tls_mask != 0
8582 && (tls_mask & TLS_TPREL) == 0)
8583 {
8584 bfd_vma rtra;
8585 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8586 if ((insn & ((0x3f << 26) | (31 << 11)))
8587 == ((31 << 26) | (13 << 11)))
8588 rtra = insn & ((1 << 26) - (1 << 16));
8589 else if ((insn & ((0x3f << 26) | (31 << 16)))
8590 == ((31 << 26) | (13 << 16)))
8591 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
8592 else
8593 abort ();
8594 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
8595 /* add -> addi. */
8596 insn = 14 << 26;
8597 else if ((insn & (31 << 1)) == 23 << 1
8598 && ((insn & (31 << 6)) < 14 << 6
8599 || ((insn & (31 << 6)) >= 16 << 6
8600 && (insn & (31 << 6)) < 24 << 6)))
8601 /* load and store indexed -> dform. */
8602 insn = (32 | ((insn >> 6) & 31)) << 26;
8603 else if ((insn & (31 << 1)) == 21 << 1
8604 && (insn & (0x1a << 6)) == 0)
8605 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
8606 insn = (((58 | ((insn >> 6) & 4)) << 26)
8607 | ((insn >> 6) & 1));
8608 else if ((insn & (31 << 1)) == 21 << 1
8609 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
8610 /* lwax -> lwa. */
8611 insn = (58 << 26) | 2;
8612 else
8613 abort ();
8614 insn |= rtra;
8615 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8616 /* Was PPC64_TLS which sits on insn boundary, now
8617 PPC64_TPREL16_LO which is at insn+2. */
8618 rel->r_offset += 2;
8619 r_type = R_PPC64_TPREL16_LO;
8620 if (toc_symndx != 0)
8621 {
8622 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
8623 /* We changed the symbol. Start over in order to
8624 get h, sym, sec etc. right. */
8625 rel--;
8626 continue;
8627 }
8628 else
8629 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8630 }
8631 break;
8632
8633 case R_PPC64_GOT_TLSGD16_HI:
8634 case R_PPC64_GOT_TLSGD16_HA:
8635 tls_gd = TLS_TPRELGD;
8636 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8637 goto tls_gdld_hi;
8638 break;
8639
8640 case R_PPC64_GOT_TLSLD16_HI:
8641 case R_PPC64_GOT_TLSLD16_HA:
8642 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8643 {
8644 tls_gdld_hi:
8645 if ((tls_mask & tls_gd) != 0)
8646 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
8647 + R_PPC64_GOT_TPREL16_DS);
8648 else
8649 {
8650 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
8651 rel->r_offset -= 2;
8652 r_type = R_PPC64_NONE;
8653 }
8654 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8655 }
8656 break;
8657
8658 case R_PPC64_GOT_TLSGD16:
8659 case R_PPC64_GOT_TLSGD16_LO:
8660 tls_gd = TLS_TPRELGD;
8661 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
8662 goto tls_get_addr_check;
8663 break;
8664
8665 case R_PPC64_GOT_TLSLD16:
8666 case R_PPC64_GOT_TLSLD16_LO:
8667 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
8668 {
8669 tls_get_addr_check:
8670 if (rel + 1 < relend)
8671 {
8672 enum elf_ppc64_reloc_type r_type2;
8673 unsigned long r_symndx2;
8674 struct elf_link_hash_entry *h2;
8675 bfd_vma insn1, insn2, insn3;
8676 bfd_vma offset;
8677
8678 /* The next instruction should be a call to
8679 __tls_get_addr. Peek at the reloc to be sure. */
8680 r_type2 = ELF64_R_TYPE (rel[1].r_info);
8681 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
8682 if (r_symndx2 < symtab_hdr->sh_info
8683 || (r_type2 != R_PPC64_REL14
8684 && r_type2 != R_PPC64_REL14_BRTAKEN
8685 && r_type2 != R_PPC64_REL14_BRNTAKEN
8686 && r_type2 != R_PPC64_REL24))
8687 break;
8688
8689 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
8690 while (h2->root.type == bfd_link_hash_indirect
8691 || h2->root.type == bfd_link_hash_warning)
8692 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
8693 if (h2 == NULL || (h2 != &htab->tls_get_addr->elf
8694 && h2 != &htab->tls_get_addr_fd->elf))
8695 break;
8696
8697 /* OK, it checks out. Replace the call. */
8698 offset = rel[1].r_offset;
8699 insn1 = bfd_get_32 (output_bfd,
8700 contents + rel->r_offset - 2);
8701 insn3 = bfd_get_32 (output_bfd,
8702 contents + offset + 4);
8703 if ((tls_mask & tls_gd) != 0)
8704 {
8705 /* IE */
8706 insn1 &= (1 << 26) - (1 << 2);
8707 insn1 |= 58 << 26; /* ld */
8708 insn2 = 0x7c636a14; /* add 3,3,13 */
8709 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
8710 if ((tls_mask & TLS_EXPLICIT) == 0)
8711 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
8712 + R_PPC64_GOT_TPREL16_DS);
8713 else
8714 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
8715 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8716 }
8717 else
8718 {
8719 /* LE */
8720 insn1 = 0x3c6d0000; /* addis 3,13,0 */
8721 insn2 = 0x38630000; /* addi 3,3,0 */
8722 if (tls_gd == 0)
8723 {
8724 /* Was an LD reloc. */
8725 r_symndx = 0;
8726 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8727 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8728 }
8729 else if (toc_symndx != 0)
8730 r_symndx = toc_symndx;
8731 r_type = R_PPC64_TPREL16_HA;
8732 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8733 rel[1].r_info = ELF64_R_INFO (r_symndx,
8734 R_PPC64_TPREL16_LO);
8735 rel[1].r_offset += 2;
8736 }
8737 if (insn3 == NOP
8738 || insn3 == CROR_151515 || insn3 == CROR_313131)
8739 {
8740 insn3 = insn2;
8741 insn2 = NOP;
8742 rel[1].r_offset += 4;
8743 }
8744 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
8745 bfd_put_32 (output_bfd, insn2, contents + offset);
8746 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
8747 if (tls_gd == 0 || toc_symndx != 0)
8748 {
8749 /* We changed the symbol. Start over in order
8750 to get h, sym, sec etc. right. */
8751 rel--;
8752 continue;
8753 }
8754 }
8755 }
8756 break;
8757
8758 case R_PPC64_DTPMOD64:
8759 if (rel + 1 < relend
8760 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
8761 && rel[1].r_offset == rel->r_offset + 8)
8762 {
8763 if ((tls_mask & TLS_GD) == 0)
8764 {
8765 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
8766 if ((tls_mask & TLS_TPRELGD) != 0)
8767 r_type = R_PPC64_TPREL64;
8768 else
8769 {
8770 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
8771 r_type = R_PPC64_NONE;
8772 }
8773 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8774 }
8775 }
8776 else
8777 {
8778 if ((tls_mask & TLS_LD) == 0)
8779 {
8780 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
8781 r_type = R_PPC64_NONE;
8782 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8783 }
8784 }
8785 break;
8786
8787 case R_PPC64_TPREL64:
8788 if ((tls_mask & TLS_TPREL) == 0)
8789 {
8790 r_type = R_PPC64_NONE;
8791 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
8792 }
8793 break;
8794 }
8795
8796 /* Handle other relocations that tweak non-addend part of insn. */
8797 insn = 0;
8798 max_br_offset = 1 << 25;
8799 addend = rel->r_addend;
8800 switch (r_type)
8801 {
8802 default:
8803 break;
8804
8805 /* Branch taken prediction relocations. */
8806 case R_PPC64_ADDR14_BRTAKEN:
8807 case R_PPC64_REL14_BRTAKEN:
8808 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
8809 /* Fall thru. */
8810
8811 /* Branch not taken prediction relocations. */
8812 case R_PPC64_ADDR14_BRNTAKEN:
8813 case R_PPC64_REL14_BRNTAKEN:
8814 insn |= bfd_get_32 (output_bfd,
8815 contents + rel->r_offset) & ~(0x01 << 21);
8816 /* Fall thru. */
8817
8818 case R_PPC64_REL14:
8819 max_br_offset = 1 << 15;
8820 /* Fall thru. */
8821
8822 case R_PPC64_REL24:
8823 /* Calls to functions with a different TOC, such as calls to
8824 shared objects, need to alter the TOC pointer. This is
8825 done using a linkage stub. A REL24 branching to these
8826 linkage stubs needs to be followed by a nop, as the nop
8827 will be replaced with an instruction to restore the TOC
8828 base pointer. */
8829 stub_entry = NULL;
8830 fdh = h;
8831 if (((h != NULL
8832 && (((fdh = &((struct ppc_link_hash_entry *) h)->oh->elf) != NULL
8833 && fdh->plt.plist != NULL)
8834 || (fdh = h)->plt.plist != NULL))
8835 || (sec != NULL
8836 && sec->output_section != NULL
8837 && sec->id <= htab->top_id
8838 && (htab->stub_group[sec->id].toc_off
8839 != htab->stub_group[input_section->id].toc_off)))
8840 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
8841 rel, htab)) != NULL
8842 && (stub_entry->stub_type == ppc_stub_plt_call
8843 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
8844 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
8845 {
8846 bfd_boolean can_plt_call = FALSE;
8847
8848 if (rel->r_offset + 8 <= input_section->size)
8849 {
8850 unsigned long nop;
8851 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
8852 if (nop == NOP
8853 || nop == CROR_151515 || nop == CROR_313131)
8854 {
8855 bfd_put_32 (input_bfd, LD_R2_40R1,
8856 contents + rel->r_offset + 4);
8857 can_plt_call = TRUE;
8858 }
8859 }
8860
8861 if (!can_plt_call)
8862 {
8863 if (stub_entry->stub_type == ppc_stub_plt_call)
8864 {
8865 /* If this is a plain branch rather than a branch
8866 and link, don't require a nop. */
8867 unsigned long br;
8868 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
8869 if ((br & 1) == 0)
8870 can_plt_call = TRUE;
8871 }
8872 else if (h != NULL
8873 && strcmp (h->root.root.string,
8874 ".__libc_start_main") == 0)
8875 {
8876 /* Allow crt1 branch to go via a toc adjusting stub. */
8877 can_plt_call = TRUE;
8878 }
8879 else
8880 {
8881 if (strcmp (input_section->output_section->name,
8882 ".init") == 0
8883 || strcmp (input_section->output_section->name,
8884 ".fini") == 0)
8885 (*_bfd_error_handler)
8886 (_("%B(%A+0x%lx): automatic multiple TOCs "
8887 "not supported using your crt files; "
8888 "recompile with -mminimal-toc or upgrade gcc"),
8889 input_bfd,
8890 input_section,
8891 (long) rel->r_offset);
8892 else
8893 (*_bfd_error_handler)
8894 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
8895 "does not allow automatic multiple TOCs; "
8896 "recompile with -mminimal-toc or "
8897 "-fno-optimize-sibling-calls, "
8898 "or make `%s' extern"),
8899 input_bfd,
8900 input_section,
8901 (long) rel->r_offset,
8902 sym_name,
8903 sym_name);
8904 bfd_set_error (bfd_error_bad_value);
8905 ret = FALSE;
8906 }
8907 }
8908
8909 if (can_plt_call
8910 && stub_entry->stub_type == ppc_stub_plt_call)
8911 unresolved_reloc = FALSE;
8912 }
8913
8914 if (stub_entry == NULL
8915 && get_opd_info (sec) != NULL)
8916 {
8917 /* The branch destination is the value of the opd entry. */
8918 bfd_vma off = (relocation - sec->output_section->vma
8919 - sec->output_offset + rel->r_addend);
8920 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
8921 if (dest != (bfd_vma) -1)
8922 {
8923 relocation = dest;
8924 addend = 0;
8925 }
8926 }
8927
8928 /* If the branch is out of reach we ought to have a long
8929 branch stub. */
8930 from = (rel->r_offset
8931 + input_section->output_offset
8932 + input_section->output_section->vma);
8933
8934 if (stub_entry == NULL
8935 && (relocation + rel->r_addend - from + max_br_offset
8936 >= 2 * max_br_offset)
8937 && r_type != R_PPC64_ADDR14_BRTAKEN
8938 && r_type != R_PPC64_ADDR14_BRNTAKEN)
8939 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel, htab);
8940
8941 if (stub_entry != NULL)
8942 {
8943 /* Munge up the value and addend so that we call the stub
8944 rather than the procedure directly. */
8945 relocation = (stub_entry->stub_offset
8946 + stub_entry->stub_sec->output_offset
8947 + stub_entry->stub_sec->output_section->vma);
8948 addend = 0;
8949 }
8950
8951 if (insn != 0)
8952 {
8953 if (is_power4)
8954 {
8955 /* Set 'a' bit. This is 0b00010 in BO field for branch
8956 on CR(BI) insns (BO == 001at or 011at), and 0b01000
8957 for branch on CTR insns (BO == 1a00t or 1a01t). */
8958 if ((insn & (0x14 << 21)) == (0x04 << 21))
8959 insn |= 0x02 << 21;
8960 else if ((insn & (0x14 << 21)) == (0x10 << 21))
8961 insn |= 0x08 << 21;
8962 else
8963 break;
8964 }
8965 else
8966 {
8967 /* Invert 'y' bit if not the default. */
8968 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8969 insn ^= 0x01 << 21;
8970 }
8971
8972 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8973 }
8974
8975 /* NOP out calls to undefined weak functions.
8976 We can thus call a weak function without first
8977 checking whether the function is defined. */
8978 else if (h != NULL
8979 && h->root.type == bfd_link_hash_undefweak
8980 && r_type == R_PPC64_REL24
8981 && relocation == 0
8982 && rel->r_addend == 0)
8983 {
8984 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
8985 continue;
8986 }
8987 break;
8988 }
8989
8990 /* Set `addend'. */
8991 tls_type = 0;
8992 switch (r_type)
8993 {
8994 default:
8995 (*_bfd_error_handler)
8996 (_("%B: unknown relocation type %d for symbol %s"),
8997 input_bfd, (int) r_type, sym_name);
8998
8999 bfd_set_error (bfd_error_bad_value);
9000 ret = FALSE;
9001 continue;
9002
9003 case R_PPC64_NONE:
9004 case R_PPC64_TLS:
9005 case R_PPC64_GNU_VTINHERIT:
9006 case R_PPC64_GNU_VTENTRY:
9007 continue;
9008
9009 /* GOT16 relocations. Like an ADDR16 using the symbol's
9010 address in the GOT as relocation value instead of the
9011 symbol's value itself. Also, create a GOT entry for the
9012 symbol and put the symbol value there. */
9013 case R_PPC64_GOT_TLSGD16:
9014 case R_PPC64_GOT_TLSGD16_LO:
9015 case R_PPC64_GOT_TLSGD16_HI:
9016 case R_PPC64_GOT_TLSGD16_HA:
9017 tls_type = TLS_TLS | TLS_GD;
9018 goto dogot;
9019
9020 case R_PPC64_GOT_TLSLD16:
9021 case R_PPC64_GOT_TLSLD16_LO:
9022 case R_PPC64_GOT_TLSLD16_HI:
9023 case R_PPC64_GOT_TLSLD16_HA:
9024 tls_type = TLS_TLS | TLS_LD;
9025 goto dogot;
9026
9027 case R_PPC64_GOT_TPREL16_DS:
9028 case R_PPC64_GOT_TPREL16_LO_DS:
9029 case R_PPC64_GOT_TPREL16_HI:
9030 case R_PPC64_GOT_TPREL16_HA:
9031 tls_type = TLS_TLS | TLS_TPREL;
9032 goto dogot;
9033
9034 case R_PPC64_GOT_DTPREL16_DS:
9035 case R_PPC64_GOT_DTPREL16_LO_DS:
9036 case R_PPC64_GOT_DTPREL16_HI:
9037 case R_PPC64_GOT_DTPREL16_HA:
9038 tls_type = TLS_TLS | TLS_DTPREL;
9039 goto dogot;
9040
9041 case R_PPC64_GOT16:
9042 case R_PPC64_GOT16_LO:
9043 case R_PPC64_GOT16_HI:
9044 case R_PPC64_GOT16_HA:
9045 case R_PPC64_GOT16_DS:
9046 case R_PPC64_GOT16_LO_DS:
9047 dogot:
9048 {
9049 /* Relocation is to the entry for this symbol in the global
9050 offset table. */
9051 asection *got;
9052 bfd_vma *offp;
9053 bfd_vma off;
9054 unsigned long indx = 0;
9055
9056 if (tls_type == (TLS_TLS | TLS_LD)
9057 && (h == NULL
9058 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
9059 offp = &ppc64_tlsld_got (input_bfd)->offset;
9060 else
9061 {
9062 struct got_entry *ent;
9063
9064 if (h != NULL)
9065 {
9066 bfd_boolean dyn = htab->elf.dynamic_sections_created;
9067 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
9068 || (info->shared
9069 && SYMBOL_REFERENCES_LOCAL (info, h)))
9070 /* This is actually a static link, or it is a
9071 -Bsymbolic link and the symbol is defined
9072 locally, or the symbol was forced to be local
9073 because of a version file. */
9074 ;
9075 else
9076 {
9077 indx = h->dynindx;
9078 unresolved_reloc = FALSE;
9079 }
9080 ent = h->got.glist;
9081 }
9082 else
9083 {
9084 if (local_got_ents == NULL)
9085 abort ();
9086 ent = local_got_ents[r_symndx];
9087 }
9088
9089 for (; ent != NULL; ent = ent->next)
9090 if (ent->addend == rel->r_addend
9091 && ent->owner == input_bfd
9092 && ent->tls_type == tls_type)
9093 break;
9094 if (ent == NULL)
9095 abort ();
9096 offp = &ent->got.offset;
9097 }
9098
9099 got = ppc64_elf_tdata (input_bfd)->got;
9100 if (got == NULL)
9101 abort ();
9102
9103 /* The offset must always be a multiple of 8. We use the
9104 least significant bit to record whether we have already
9105 processed this entry. */
9106 off = *offp;
9107 if ((off & 1) != 0)
9108 off &= ~1;
9109 else
9110 {
9111 /* Generate relocs for the dynamic linker, except in
9112 the case of TLSLD where we'll use one entry per
9113 module. */
9114 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
9115
9116 *offp = off | 1;
9117 if ((info->shared || indx != 0)
9118 && (h == NULL
9119 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9120 || h->root.type != bfd_link_hash_undefweak))
9121 {
9122 outrel.r_offset = (got->output_section->vma
9123 + got->output_offset
9124 + off);
9125 outrel.r_addend = rel->r_addend;
9126 if (tls_type & (TLS_LD | TLS_GD))
9127 {
9128 outrel.r_addend = 0;
9129 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
9130 if (tls_type == (TLS_TLS | TLS_GD))
9131 {
9132 loc = relgot->contents;
9133 loc += (relgot->reloc_count++
9134 * sizeof (Elf64_External_Rela));
9135 bfd_elf64_swap_reloca_out (output_bfd,
9136 &outrel, loc);
9137 outrel.r_offset += 8;
9138 outrel.r_addend = rel->r_addend;
9139 outrel.r_info
9140 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
9141 }
9142 }
9143 else if (tls_type == (TLS_TLS | TLS_DTPREL))
9144 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
9145 else if (tls_type == (TLS_TLS | TLS_TPREL))
9146 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
9147 else if (indx == 0)
9148 {
9149 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
9150
9151 /* Write the .got section contents for the sake
9152 of prelink. */
9153 loc = got->contents + off;
9154 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
9155 loc);
9156 }
9157 else
9158 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
9159
9160 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
9161 {
9162 outrel.r_addend += relocation;
9163 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
9164 outrel.r_addend -= htab->elf.tls_sec->vma;
9165 }
9166 loc = relgot->contents;
9167 loc += (relgot->reloc_count++
9168 * sizeof (Elf64_External_Rela));
9169 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
9170 }
9171
9172 /* Init the .got section contents here if we're not
9173 emitting a reloc. */
9174 else
9175 {
9176 relocation += rel->r_addend;
9177 if (tls_type == (TLS_TLS | TLS_LD))
9178 relocation = 1;
9179 else if (tls_type != 0)
9180 {
9181 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
9182 if (tls_type == (TLS_TLS | TLS_TPREL))
9183 relocation += DTP_OFFSET - TP_OFFSET;
9184
9185 if (tls_type == (TLS_TLS | TLS_GD))
9186 {
9187 bfd_put_64 (output_bfd, relocation,
9188 got->contents + off + 8);
9189 relocation = 1;
9190 }
9191 }
9192
9193 bfd_put_64 (output_bfd, relocation,
9194 got->contents + off);
9195 }
9196 }
9197
9198 if (off >= (bfd_vma) -2)
9199 abort ();
9200
9201 relocation = got->output_offset + off;
9202
9203 /* TOC base (r2) is TOC start plus 0x8000. */
9204 addend = -TOC_BASE_OFF;
9205 }
9206 break;
9207
9208 case R_PPC64_PLT16_HA:
9209 case R_PPC64_PLT16_HI:
9210 case R_PPC64_PLT16_LO:
9211 case R_PPC64_PLT32:
9212 case R_PPC64_PLT64:
9213 /* Relocation is to the entry for this symbol in the
9214 procedure linkage table. */
9215
9216 /* Resolve a PLT reloc against a local symbol directly,
9217 without using the procedure linkage table. */
9218 if (h == NULL)
9219 break;
9220
9221 /* It's possible that we didn't make a PLT entry for this
9222 symbol. This happens when statically linking PIC code,
9223 or when using -Bsymbolic. Go find a match if there is a
9224 PLT entry. */
9225 if (htab->plt != NULL)
9226 {
9227 struct plt_entry *ent;
9228 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9229 if (ent->addend == rel->r_addend
9230 && ent->plt.offset != (bfd_vma) -1)
9231 {
9232 relocation = (htab->plt->output_section->vma
9233 + htab->plt->output_offset
9234 + ent->plt.offset);
9235 unresolved_reloc = FALSE;
9236 }
9237 }
9238 break;
9239
9240 case R_PPC64_TOC:
9241 /* Relocation value is TOC base. */
9242 relocation = TOCstart;
9243 if (r_symndx == 0)
9244 relocation += htab->stub_group[input_section->id].toc_off;
9245 else if (unresolved_reloc)
9246 ;
9247 else if (sec != NULL && sec->id <= htab->top_id)
9248 relocation += htab->stub_group[sec->id].toc_off;
9249 else
9250 unresolved_reloc = TRUE;
9251 goto dodyn2;
9252
9253 /* TOC16 relocs. We want the offset relative to the TOC base,
9254 which is the address of the start of the TOC plus 0x8000.
9255 The TOC consists of sections .got, .toc, .tocbss, and .plt,
9256 in this order. */
9257 case R_PPC64_TOC16:
9258 case R_PPC64_TOC16_LO:
9259 case R_PPC64_TOC16_HI:
9260 case R_PPC64_TOC16_DS:
9261 case R_PPC64_TOC16_LO_DS:
9262 case R_PPC64_TOC16_HA:
9263 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
9264 break;
9265
9266 /* Relocate against the beginning of the section. */
9267 case R_PPC64_SECTOFF:
9268 case R_PPC64_SECTOFF_LO:
9269 case R_PPC64_SECTOFF_HI:
9270 case R_PPC64_SECTOFF_DS:
9271 case R_PPC64_SECTOFF_LO_DS:
9272 case R_PPC64_SECTOFF_HA:
9273 if (sec != NULL)
9274 addend -= sec->output_section->vma;
9275 break;
9276
9277 case R_PPC64_REL14:
9278 case R_PPC64_REL14_BRNTAKEN:
9279 case R_PPC64_REL14_BRTAKEN:
9280 case R_PPC64_REL24:
9281 break;
9282
9283 case R_PPC64_TPREL16:
9284 case R_PPC64_TPREL16_LO:
9285 case R_PPC64_TPREL16_HI:
9286 case R_PPC64_TPREL16_HA:
9287 case R_PPC64_TPREL16_DS:
9288 case R_PPC64_TPREL16_LO_DS:
9289 case R_PPC64_TPREL16_HIGHER:
9290 case R_PPC64_TPREL16_HIGHERA:
9291 case R_PPC64_TPREL16_HIGHEST:
9292 case R_PPC64_TPREL16_HIGHESTA:
9293 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9294 if (info->shared)
9295 /* The TPREL16 relocs shouldn't really be used in shared
9296 libs as they will result in DT_TEXTREL being set, but
9297 support them anyway. */
9298 goto dodyn;
9299 break;
9300
9301 case R_PPC64_DTPREL16:
9302 case R_PPC64_DTPREL16_LO:
9303 case R_PPC64_DTPREL16_HI:
9304 case R_PPC64_DTPREL16_HA:
9305 case R_PPC64_DTPREL16_DS:
9306 case R_PPC64_DTPREL16_LO_DS:
9307 case R_PPC64_DTPREL16_HIGHER:
9308 case R_PPC64_DTPREL16_HIGHERA:
9309 case R_PPC64_DTPREL16_HIGHEST:
9310 case R_PPC64_DTPREL16_HIGHESTA:
9311 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9312 break;
9313
9314 case R_PPC64_DTPMOD64:
9315 relocation = 1;
9316 addend = 0;
9317 goto dodyn;
9318
9319 case R_PPC64_TPREL64:
9320 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9321 goto dodyn;
9322
9323 case R_PPC64_DTPREL64:
9324 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9325 /* Fall thru */
9326
9327 /* Relocations that may need to be propagated if this is a
9328 dynamic object. */
9329 case R_PPC64_REL30:
9330 case R_PPC64_REL32:
9331 case R_PPC64_REL64:
9332 case R_PPC64_ADDR14:
9333 case R_PPC64_ADDR14_BRNTAKEN:
9334 case R_PPC64_ADDR14_BRTAKEN:
9335 case R_PPC64_ADDR16:
9336 case R_PPC64_ADDR16_DS:
9337 case R_PPC64_ADDR16_HA:
9338 case R_PPC64_ADDR16_HI:
9339 case R_PPC64_ADDR16_HIGHER:
9340 case R_PPC64_ADDR16_HIGHERA:
9341 case R_PPC64_ADDR16_HIGHEST:
9342 case R_PPC64_ADDR16_HIGHESTA:
9343 case R_PPC64_ADDR16_LO:
9344 case R_PPC64_ADDR16_LO_DS:
9345 case R_PPC64_ADDR24:
9346 case R_PPC64_ADDR32:
9347 case R_PPC64_ADDR64:
9348 case R_PPC64_UADDR16:
9349 case R_PPC64_UADDR32:
9350 case R_PPC64_UADDR64:
9351 /* r_symndx will be zero only for relocs against symbols
9352 from removed linkonce sections, or sections discarded by
9353 a linker script. */
9354 dodyn:
9355 if (r_symndx == 0)
9356 break;
9357 /* Fall thru. */
9358
9359 dodyn2:
9360 if ((input_section->flags & SEC_ALLOC) == 0)
9361 break;
9362
9363 if (NO_OPD_RELOCS && is_opd)
9364 break;
9365
9366 if ((info->shared
9367 && (h == NULL
9368 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9369 || h->root.type != bfd_link_hash_undefweak)
9370 && (MUST_BE_DYN_RELOC (r_type)
9371 || !SYMBOL_CALLS_LOCAL (info, h)))
9372 || (ELIMINATE_COPY_RELOCS
9373 && !info->shared
9374 && h != NULL
9375 && h->dynindx != -1
9376 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
9377 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
9378 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
9379 {
9380 Elf_Internal_Rela outrel;
9381 bfd_boolean skip, relocate;
9382 asection *sreloc;
9383 bfd_byte *loc;
9384 bfd_vma out_off;
9385
9386 /* When generating a dynamic object, these relocations
9387 are copied into the output file to be resolved at run
9388 time. */
9389
9390 skip = FALSE;
9391 relocate = FALSE;
9392
9393 out_off = _bfd_elf_section_offset (output_bfd, info,
9394 input_section, rel->r_offset);
9395 if (out_off == (bfd_vma) -1)
9396 skip = TRUE;
9397 else if (out_off == (bfd_vma) -2)
9398 skip = TRUE, relocate = TRUE;
9399 out_off += (input_section->output_section->vma
9400 + input_section->output_offset);
9401 outrel.r_offset = out_off;
9402 outrel.r_addend = rel->r_addend;
9403
9404 /* Optimize unaligned reloc use. */
9405 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
9406 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
9407 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
9408 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
9409 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
9410 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
9411 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
9412 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
9413 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
9414
9415 if (skip)
9416 memset (&outrel, 0, sizeof outrel);
9417 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
9418 && !is_opd
9419 && r_type != R_PPC64_TOC)
9420 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
9421 else
9422 {
9423 /* This symbol is local, or marked to become local,
9424 or this is an opd section reloc which must point
9425 at a local function. */
9426 outrel.r_addend += relocation;
9427 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
9428 {
9429 if (is_opd && h != NULL)
9430 {
9431 /* Lie about opd entries. This case occurs
9432 when building shared libraries and we
9433 reference a function in another shared
9434 lib. The same thing happens for a weak
9435 definition in an application that's
9436 overridden by a strong definition in a
9437 shared lib. (I believe this is a generic
9438 bug in binutils handling of weak syms.)
9439 In these cases we won't use the opd
9440 entry in this lib. */
9441 unresolved_reloc = FALSE;
9442 }
9443 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9444
9445 /* We need to relocate .opd contents for ld.so.
9446 Prelink also wants simple and consistent rules
9447 for relocs. This make all RELATIVE relocs have
9448 *r_offset equal to r_addend. */
9449 relocate = TRUE;
9450 }
9451 else
9452 {
9453 long indx = 0;
9454
9455 if (bfd_is_abs_section (sec))
9456 ;
9457 else if (sec == NULL || sec->owner == NULL)
9458 {
9459 bfd_set_error (bfd_error_bad_value);
9460 return FALSE;
9461 }
9462 else
9463 {
9464 asection *osec;
9465
9466 osec = sec->output_section;
9467 indx = elf_section_data (osec)->dynindx;
9468
9469 /* We are turning this relocation into one
9470 against a section symbol, so subtract out
9471 the output section's address but not the
9472 offset of the input section in the output
9473 section. */
9474 outrel.r_addend -= osec->vma;
9475 }
9476
9477 outrel.r_info = ELF64_R_INFO (indx, r_type);
9478 }
9479 }
9480
9481 sreloc = elf_section_data (input_section)->sreloc;
9482 if (sreloc == NULL)
9483 abort ();
9484
9485 loc = sreloc->contents;
9486 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
9487 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
9488
9489 /* If this reloc is against an external symbol, it will
9490 be computed at runtime, so there's no need to do
9491 anything now. However, for the sake of prelink ensure
9492 that the section contents are a known value. */
9493 if (! relocate)
9494 {
9495 unresolved_reloc = FALSE;
9496 /* The value chosen here is quite arbitrary as ld.so
9497 ignores section contents except for the special
9498 case of .opd where the contents might be accessed
9499 before relocation. Choose zero, as that won't
9500 cause reloc overflow. */
9501 relocation = 0;
9502 addend = 0;
9503 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
9504 to improve backward compatibility with older
9505 versions of ld. */
9506 if (r_type == R_PPC64_ADDR64)
9507 addend = outrel.r_addend;
9508 /* Adjust pc_relative relocs to have zero in *r_offset. */
9509 else if (ppc64_elf_howto_table[r_type]->pc_relative)
9510 addend = (input_section->output_section->vma
9511 + input_section->output_offset
9512 + rel->r_offset);
9513 }
9514 }
9515 break;
9516
9517 case R_PPC64_COPY:
9518 case R_PPC64_GLOB_DAT:
9519 case R_PPC64_JMP_SLOT:
9520 case R_PPC64_RELATIVE:
9521 /* We shouldn't ever see these dynamic relocs in relocatable
9522 files. */
9523 /* Fall through. */
9524
9525 case R_PPC64_PLTGOT16:
9526 case R_PPC64_PLTGOT16_DS:
9527 case R_PPC64_PLTGOT16_HA:
9528 case R_PPC64_PLTGOT16_HI:
9529 case R_PPC64_PLTGOT16_LO:
9530 case R_PPC64_PLTGOT16_LO_DS:
9531 case R_PPC64_PLTREL32:
9532 case R_PPC64_PLTREL64:
9533 /* These ones haven't been implemented yet. */
9534
9535 (*_bfd_error_handler)
9536 (_("%B: relocation %s is not supported for symbol %s."),
9537 input_bfd,
9538 ppc64_elf_howto_table[r_type]->name, sym_name);
9539
9540 bfd_set_error (bfd_error_invalid_operation);
9541 ret = FALSE;
9542 continue;
9543 }
9544
9545 /* Do any further special processing. */
9546 switch (r_type)
9547 {
9548 default:
9549 break;
9550
9551 case R_PPC64_ADDR16_HA:
9552 case R_PPC64_ADDR16_HIGHERA:
9553 case R_PPC64_ADDR16_HIGHESTA:
9554 case R_PPC64_GOT16_HA:
9555 case R_PPC64_PLTGOT16_HA:
9556 case R_PPC64_PLT16_HA:
9557 case R_PPC64_TOC16_HA:
9558 case R_PPC64_SECTOFF_HA:
9559 case R_PPC64_TPREL16_HA:
9560 case R_PPC64_DTPREL16_HA:
9561 case R_PPC64_GOT_TLSGD16_HA:
9562 case R_PPC64_GOT_TLSLD16_HA:
9563 case R_PPC64_GOT_TPREL16_HA:
9564 case R_PPC64_GOT_DTPREL16_HA:
9565 case R_PPC64_TPREL16_HIGHER:
9566 case R_PPC64_TPREL16_HIGHERA:
9567 case R_PPC64_TPREL16_HIGHEST:
9568 case R_PPC64_TPREL16_HIGHESTA:
9569 case R_PPC64_DTPREL16_HIGHER:
9570 case R_PPC64_DTPREL16_HIGHERA:
9571 case R_PPC64_DTPREL16_HIGHEST:
9572 case R_PPC64_DTPREL16_HIGHESTA:
9573 /* It's just possible that this symbol is a weak symbol
9574 that's not actually defined anywhere. In that case,
9575 'sec' would be NULL, and we should leave the symbol
9576 alone (it will be set to zero elsewhere in the link). */
9577 if (sec != NULL)
9578 /* Add 0x10000 if sign bit in 0:15 is set.
9579 Bits 0:15 are not used. */
9580 addend += 0x8000;
9581 break;
9582
9583 case R_PPC64_ADDR16_DS:
9584 case R_PPC64_ADDR16_LO_DS:
9585 case R_PPC64_GOT16_DS:
9586 case R_PPC64_GOT16_LO_DS:
9587 case R_PPC64_PLT16_LO_DS:
9588 case R_PPC64_SECTOFF_DS:
9589 case R_PPC64_SECTOFF_LO_DS:
9590 case R_PPC64_TOC16_DS:
9591 case R_PPC64_TOC16_LO_DS:
9592 case R_PPC64_PLTGOT16_DS:
9593 case R_PPC64_PLTGOT16_LO_DS:
9594 case R_PPC64_GOT_TPREL16_DS:
9595 case R_PPC64_GOT_TPREL16_LO_DS:
9596 case R_PPC64_GOT_DTPREL16_DS:
9597 case R_PPC64_GOT_DTPREL16_LO_DS:
9598 case R_PPC64_TPREL16_DS:
9599 case R_PPC64_TPREL16_LO_DS:
9600 case R_PPC64_DTPREL16_DS:
9601 case R_PPC64_DTPREL16_LO_DS:
9602 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9603 mask = 3;
9604 /* If this reloc is against an lq insn, then the value must be
9605 a multiple of 16. This is somewhat of a hack, but the
9606 "correct" way to do this by defining _DQ forms of all the
9607 _DS relocs bloats all reloc switches in this file. It
9608 doesn't seem to make much sense to use any of these relocs
9609 in data, so testing the insn should be safe. */
9610 if ((insn & (0x3f << 26)) == (56u << 26))
9611 mask = 15;
9612 if (((relocation + addend) & mask) != 0)
9613 {
9614 (*_bfd_error_handler)
9615 (_("%B: error: relocation %s not a multiple of %d"),
9616 input_bfd,
9617 ppc64_elf_howto_table[r_type]->name,
9618 mask + 1);
9619 bfd_set_error (bfd_error_bad_value);
9620 ret = FALSE;
9621 continue;
9622 }
9623 break;
9624 }
9625
9626 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
9627 because such sections are not SEC_ALLOC and thus ld.so will
9628 not process them. */
9629 if (unresolved_reloc
9630 && !((input_section->flags & SEC_DEBUGGING) != 0
9631 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
9632 {
9633 (*_bfd_error_handler)
9634 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
9635 input_bfd,
9636 input_section,
9637 (long) rel->r_offset,
9638 ppc64_elf_howto_table[(int) r_type]->name,
9639 h->root.root.string);
9640 ret = FALSE;
9641 }
9642
9643 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
9644 input_bfd,
9645 input_section,
9646 contents,
9647 rel->r_offset,
9648 relocation,
9649 addend);
9650
9651 if (r != bfd_reloc_ok)
9652 {
9653 if (sym_name == NULL)
9654 sym_name = "(null)";
9655 if (r == bfd_reloc_overflow)
9656 {
9657 if (warned)
9658 continue;
9659 if (h != NULL
9660 && h->root.type == bfd_link_hash_undefweak
9661 && ppc64_elf_howto_table[r_type]->pc_relative)
9662 {
9663 /* Assume this is a call protected by other code that
9664 detects the symbol is undefined. If this is the case,
9665 we can safely ignore the overflow. If not, the
9666 program is hosed anyway, and a little warning isn't
9667 going to help. */
9668
9669 continue;
9670 }
9671
9672 if (!((*info->callbacks->reloc_overflow)
9673 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
9674 rel->r_addend, input_bfd, input_section, rel->r_offset)))
9675 return FALSE;
9676 }
9677 else
9678 {
9679 (*_bfd_error_handler)
9680 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
9681 input_bfd,
9682 input_section,
9683 (long) rel->r_offset,
9684 ppc64_elf_howto_table[r_type]->name,
9685 sym_name,
9686 (int) r);
9687 ret = FALSE;
9688 }
9689 }
9690 }
9691
9692 return ret;
9693 }
9694
9695 /* Adjust the value of any local symbols in opd sections. */
9696
9697 static bfd_boolean
9698 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
9699 const char *name ATTRIBUTE_UNUSED,
9700 Elf_Internal_Sym *elfsym,
9701 asection *input_sec,
9702 struct elf_link_hash_entry *h)
9703 {
9704 long *opd_adjust, adjust;
9705 bfd_vma value;
9706
9707 if (h != NULL)
9708 return TRUE;
9709
9710 opd_adjust = get_opd_info (input_sec);
9711 if (opd_adjust == NULL)
9712 return TRUE;
9713
9714 value = elfsym->st_value - input_sec->output_offset;
9715 if (!info->relocatable)
9716 value -= input_sec->output_section->vma;
9717
9718 adjust = opd_adjust[value / 8];
9719 if (adjust == -1)
9720 elfsym->st_value = 0;
9721 else
9722 elfsym->st_value += adjust;
9723 return TRUE;
9724 }
9725
9726 /* Finish up dynamic symbol handling. We set the contents of various
9727 dynamic sections here. */
9728
9729 static bfd_boolean
9730 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
9731 struct bfd_link_info *info,
9732 struct elf_link_hash_entry *h,
9733 Elf_Internal_Sym *sym)
9734 {
9735 struct ppc_link_hash_table *htab;
9736 bfd *dynobj;
9737 struct plt_entry *ent;
9738 Elf_Internal_Rela rela;
9739 bfd_byte *loc;
9740
9741 htab = ppc_hash_table (info);
9742 dynobj = htab->elf.dynobj;
9743
9744 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9745 if (ent->plt.offset != (bfd_vma) -1)
9746 {
9747 /* This symbol has an entry in the procedure linkage
9748 table. Set it up. */
9749
9750 if (htab->plt == NULL
9751 || htab->relplt == NULL
9752 || htab->glink == NULL)
9753 abort ();
9754
9755 /* Create a JMP_SLOT reloc to inform the dynamic linker to
9756 fill in the PLT entry. */
9757 rela.r_offset = (htab->plt->output_section->vma
9758 + htab->plt->output_offset
9759 + ent->plt.offset);
9760 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
9761 rela.r_addend = ent->addend;
9762
9763 loc = htab->relplt->contents;
9764 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
9765 * sizeof (Elf64_External_Rela));
9766 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
9767 }
9768
9769 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
9770 {
9771 Elf_Internal_Rela rela;
9772 bfd_byte *loc;
9773
9774 /* This symbol needs a copy reloc. Set it up. */
9775
9776 if (h->dynindx == -1
9777 || (h->root.type != bfd_link_hash_defined
9778 && h->root.type != bfd_link_hash_defweak)
9779 || htab->relbss == NULL)
9780 abort ();
9781
9782 rela.r_offset = (h->root.u.def.value
9783 + h->root.u.def.section->output_section->vma
9784 + h->root.u.def.section->output_offset);
9785 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
9786 rela.r_addend = 0;
9787 loc = htab->relbss->contents;
9788 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
9789 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
9790 }
9791
9792 /* Mark some specially defined symbols as absolute. */
9793 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
9794 sym->st_shndx = SHN_ABS;
9795
9796 return TRUE;
9797 }
9798
9799 /* Used to decide how to sort relocs in an optimal manner for the
9800 dynamic linker, before writing them out. */
9801
9802 static enum elf_reloc_type_class
9803 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
9804 {
9805 enum elf_ppc64_reloc_type r_type;
9806
9807 r_type = ELF64_R_TYPE (rela->r_info);
9808 switch (r_type)
9809 {
9810 case R_PPC64_RELATIVE:
9811 return reloc_class_relative;
9812 case R_PPC64_JMP_SLOT:
9813 return reloc_class_plt;
9814 case R_PPC64_COPY:
9815 return reloc_class_copy;
9816 default:
9817 return reloc_class_normal;
9818 }
9819 }
9820
9821 /* Finish up the dynamic sections. */
9822
9823 static bfd_boolean
9824 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
9825 struct bfd_link_info *info)
9826 {
9827 struct ppc_link_hash_table *htab;
9828 bfd *dynobj;
9829 asection *sdyn;
9830
9831 htab = ppc_hash_table (info);
9832 dynobj = htab->elf.dynobj;
9833 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
9834
9835 if (htab->elf.dynamic_sections_created)
9836 {
9837 Elf64_External_Dyn *dyncon, *dynconend;
9838
9839 if (sdyn == NULL || htab->got == NULL)
9840 abort ();
9841
9842 dyncon = (Elf64_External_Dyn *) sdyn->contents;
9843 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
9844 for (; dyncon < dynconend; dyncon++)
9845 {
9846 Elf_Internal_Dyn dyn;
9847 asection *s;
9848
9849 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
9850
9851 switch (dyn.d_tag)
9852 {
9853 default:
9854 continue;
9855
9856 case DT_PPC64_GLINK:
9857 s = htab->glink;
9858 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9859 /* We stupidly defined DT_PPC64_GLINK to be the start
9860 of glink rather than the first entry point, which is
9861 what ld.so needs, and now have a bigger stub to
9862 support automatic multiple TOCs. */
9863 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
9864 break;
9865
9866 case DT_PPC64_OPD:
9867 s = bfd_get_section_by_name (output_bfd, ".opd");
9868 if (s == NULL)
9869 continue;
9870 dyn.d_un.d_ptr = s->vma;
9871 break;
9872
9873 case DT_PPC64_OPDSZ:
9874 s = bfd_get_section_by_name (output_bfd, ".opd");
9875 if (s == NULL)
9876 continue;
9877 dyn.d_un.d_val = s->size;
9878 break;
9879
9880 case DT_PLTGOT:
9881 s = htab->plt;
9882 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9883 break;
9884
9885 case DT_JMPREL:
9886 s = htab->relplt;
9887 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9888 break;
9889
9890 case DT_PLTRELSZ:
9891 dyn.d_un.d_val = htab->relplt->size;
9892 break;
9893
9894 case DT_RELASZ:
9895 /* Don't count procedure linkage table relocs in the
9896 overall reloc count. */
9897 s = htab->relplt;
9898 if (s == NULL)
9899 continue;
9900 dyn.d_un.d_val -= s->size;
9901 break;
9902
9903 case DT_RELA:
9904 /* We may not be using the standard ELF linker script.
9905 If .rela.plt is the first .rela section, we adjust
9906 DT_RELA to not include it. */
9907 s = htab->relplt;
9908 if (s == NULL)
9909 continue;
9910 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
9911 continue;
9912 dyn.d_un.d_ptr += s->size;
9913 break;
9914 }
9915
9916 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
9917 }
9918 }
9919
9920 if (htab->got != NULL && htab->got->size != 0)
9921 {
9922 /* Fill in the first entry in the global offset table.
9923 We use it to hold the link-time TOCbase. */
9924 bfd_put_64 (output_bfd,
9925 elf_gp (output_bfd) + TOC_BASE_OFF,
9926 htab->got->contents);
9927
9928 /* Set .got entry size. */
9929 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
9930 }
9931
9932 if (htab->plt != NULL && htab->plt->size != 0)
9933 {
9934 /* Set .plt entry size. */
9935 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
9936 = PLT_ENTRY_SIZE;
9937 }
9938
9939 /* We need to handle writing out multiple GOT sections ourselves,
9940 since we didn't add them to DYNOBJ. */
9941 while ((dynobj = dynobj->link_next) != NULL)
9942 {
9943 asection *s;
9944 s = ppc64_elf_tdata (dynobj)->got;
9945 if (s != NULL
9946 && s->size != 0
9947 && s->output_section != bfd_abs_section_ptr
9948 && !bfd_set_section_contents (output_bfd, s->output_section,
9949 s->contents, s->output_offset,
9950 s->size))
9951 return FALSE;
9952 s = ppc64_elf_tdata (dynobj)->relgot;
9953 if (s != NULL
9954 && s->size != 0
9955 && s->output_section != bfd_abs_section_ptr
9956 && !bfd_set_section_contents (output_bfd, s->output_section,
9957 s->contents, s->output_offset,
9958 s->size))
9959 return FALSE;
9960 }
9961
9962 return TRUE;
9963 }
9964
9965 #include "elf64-target.h"
GDB Binutils - Deliverables
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