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* elf.c (_bfd_elf_link_hash_copy_indirect): Copy
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23 /* The 64-bit PowerPC ELF ABI may be found at
24 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
25 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
26
27 #include "bfd.h"
28 #include "sysdep.h"
29 #include "bfdlink.h"
30 #include "libbfd.h"
31 #include "elf-bfd.h"
32 #include "elf/ppc64.h"
33 #include "elf64-ppc.h"
34
35 static bfd_reloc_status_type ppc64_elf_ha_reloc
36 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
37 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_toc_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_toc64_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51
52
53 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
54 #define TARGET_LITTLE_NAME "elf64-powerpcle"
55 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
56 #define TARGET_BIG_NAME "elf64-powerpc"
57 #define ELF_ARCH bfd_arch_powerpc
58 #define ELF_MACHINE_CODE EM_PPC64
59 #define ELF_MAXPAGESIZE 0x10000
60 #define elf_info_to_howto ppc64_elf_info_to_howto
61
62 #define elf_backend_want_got_sym 0
63 #define elf_backend_want_plt_sym 0
64 #define elf_backend_plt_alignment 3
65 #define elf_backend_plt_not_loaded 1
66 #define elf_backend_got_symbol_offset 0
67 #define elf_backend_got_header_size 8
68 #define elf_backend_can_gc_sections 1
69 #define elf_backend_can_refcount 1
70 #define elf_backend_rela_normal 1
71
72 #define bfd_elf64_mkobject ppc64_elf_mkobject
73 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
74 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
75 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
76 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
77 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
78
79 #define elf_backend_object_p ppc64_elf_object_p
80 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
81 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
82 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
83 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
84 #define elf_backend_check_relocs ppc64_elf_check_relocs
85 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
86 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
87 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
88 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
89 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
90 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
91 #define elf_backend_relocate_section ppc64_elf_relocate_section
92 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
93 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
94 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
95 #define elf_backend_special_sections ppc64_elf_special_sections
96
97 /* The name of the dynamic interpreter. This is put in the .interp
98 section. */
99 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
100
101 /* The size in bytes of an entry in the procedure linkage table. */
102 #define PLT_ENTRY_SIZE 24
103
104 /* The initial size of the plt reserved for the dynamic linker. */
105 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
106
107 /* TOC base pointers offset from start of TOC. */
108 #define TOC_BASE_OFF 0x8000
109
110 /* Offset of tp and dtp pointers from start of TLS block. */
111 #define TP_OFFSET 0x7000
112 #define DTP_OFFSET 0x8000
113
114 /* .plt call stub instructions. The normal stub is like this, but
115 sometimes the .plt entry crosses a 64k boundary and we need to
116 insert an addis to adjust r12. */
117 #define PLT_CALL_STUB_SIZE (7*4)
118 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
119 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
120 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
121 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
122 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
123 /* ld %r11,xxx+16@l(%r12) */
124 #define BCTR 0x4e800420 /* bctr */
125
126
127 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
128 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
129
130 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
131
132 /* glink call stub instructions. We enter with the index in R0, and the
133 address of glink entry in CTR. From that, we can calculate PLT0. */
134 #define GLINK_CALL_STUB_SIZE (16*4)
135 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
136 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
137 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
138 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
139 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
140 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
141 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
142 /* sub %r12,%r12,%r11 */
143 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
144 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
145 /* ld %r11,xxx@l(%r12) */
146 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
147 /* ld %r2,8(%r12) */
148 /* mtctr %r11 */
149 /* ld %r11,16(%r12) */
150 /* bctr */
151
152 /* Pad with this. */
153 #define NOP 0x60000000
154
155 /* Some other nops. */
156 #define CROR_151515 0x4def7b82
157 #define CROR_313131 0x4ffffb82
158
159 /* .glink entries for the first 32k functions are two instructions. */
160 #define LI_R0_0 0x38000000 /* li %r0,0 */
161 #define B_DOT 0x48000000 /* b . */
162
163 /* After that, we need two instructions to load the index, followed by
164 a branch. */
165 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
166 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
167
168 /* Instructions to save and restore floating point regs. */
169 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
170 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
171 #define BLR 0x4e800020 /* blr */
172
173 /* Since .opd is an array of descriptors and each entry will end up
174 with identical R_PPC64_RELATIVE relocs, there is really no need to
175 propagate .opd relocs; The dynamic linker should be taught to
176 relocate .opd without reloc entries. */
177 #ifndef NO_OPD_RELOCS
178 #define NO_OPD_RELOCS 0
179 #endif
180 \f
181 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
182
183 /* Relocation HOWTO's. */
184 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
185
186 static reloc_howto_type ppc64_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC64_NONE, /* type */
189 0, /* rightshift */
190 2, /* size (0 = byte, 1 = short, 2 = long) */
191 32, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC64_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC64_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_bitfield, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC64_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC64_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_bitfield, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x03fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC64_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC64_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC64_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* Bits 16-31 of an address. */
264 HOWTO (R_PPC64_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC64_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
279 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC64_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc64_elf_ha_reloc, /* special_function */
288 "R_PPC64_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC64_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_bitfield, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC64_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0x0000fffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 ppc64_elf_brtaken_reloc, /* special_function */
321 "R_PPC64_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0x0000fffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_brtaken_reloc, /* special_function */
338 "R_PPC64_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC64_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC64_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x03fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC64_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC64_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x0000fffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_brtaken_reloc, /* special_function */
385 "R_PPC64_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x0000fffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_brtaken_reloc, /* special_function */
402 "R_PPC64_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC64_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc64_elf_unhandled_reloc, /* special_function */
418 "R_PPC64_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC64_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc64_elf_unhandled_reloc, /* special_function */
434 "R_PPC64_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC64_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont,/* complain_on_overflow */
449 ppc64_elf_unhandled_reloc, /* special_function */
450 "R_PPC64_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC64_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont,/* complain_on_overflow */
465 ppc64_elf_unhandled_reloc, /* special_function */
466 "R_PPC64_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* This is used only by the dynamic linker. The symbol should exist
473 both in the object being run and in some shared library. The
474 dynamic linker copies the data addressed by the symbol from the
475 shared library into the object, because the object being
476 run has to have the data at some particular address. */
477 HOWTO (R_PPC64_COPY, /* type */
478 0, /* rightshift */
479 0, /* this one is variable size */
480 0, /* bitsize */
481 FALSE, /* pc_relative */
482 0, /* bitpos */
483 complain_overflow_dont, /* complain_on_overflow */
484 ppc64_elf_unhandled_reloc, /* special_function */
485 "R_PPC64_COPY", /* name */
486 FALSE, /* partial_inplace */
487 0, /* src_mask */
488 0, /* dst_mask */
489 FALSE), /* pcrel_offset */
490
491 /* Like R_PPC64_ADDR64, but used when setting global offset table
492 entries. */
493 HOWTO (R_PPC64_GLOB_DAT, /* type */
494 0, /* rightshift */
495 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
496 64, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc64_elf_unhandled_reloc, /* special_function */
501 "R_PPC64_GLOB_DAT", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 ONES (64), /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Created by the link editor. Marks a procedure linkage table
508 entry for a symbol. */
509 HOWTO (R_PPC64_JMP_SLOT, /* type */
510 0, /* rightshift */
511 0, /* size (0 = byte, 1 = short, 2 = long) */
512 0, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc64_elf_unhandled_reloc, /* special_function */
517 "R_PPC64_JMP_SLOT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Used only by the dynamic linker. When the object is run, this
524 doubleword64 is set to the load address of the object, plus the
525 addend. */
526 HOWTO (R_PPC64_RELATIVE, /* type */
527 0, /* rightshift */
528 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
529 64, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_dont, /* complain_on_overflow */
533 bfd_elf_generic_reloc, /* special_function */
534 "R_PPC64_RELATIVE", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 ONES (64), /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Like R_PPC64_ADDR32, but may be unaligned. */
541 HOWTO (R_PPC64_UADDR32, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_bitfield, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC64_UADDR32", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC64_ADDR16, but may be unaligned. */
556 HOWTO (R_PPC64_UADDR16, /* type */
557 0, /* rightshift */
558 1, /* size (0 = byte, 1 = short, 2 = long) */
559 16, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_bitfield, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC64_UADDR16", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 0xffff, /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* 32-bit PC relative. */
571 HOWTO (R_PPC64_REL32, /* type */
572 0, /* rightshift */
573 2, /* size (0 = byte, 1 = short, 2 = long) */
574 32, /* bitsize */
575 TRUE, /* pc_relative */
576 0, /* bitpos */
577 /* FIXME: Verify. Was complain_overflow_bitfield. */
578 complain_overflow_signed, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_REL32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 TRUE), /* pcrel_offset */
585
586 /* 32-bit relocation to the symbol's procedure linkage table. */
587 HOWTO (R_PPC64_PLT32, /* type */
588 0, /* rightshift */
589 2, /* size (0 = byte, 1 = short, 2 = long) */
590 32, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 ppc64_elf_unhandled_reloc, /* special_function */
595 "R_PPC64_PLT32", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffffffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
602 FIXME: R_PPC64_PLTREL32 not supported. */
603 HOWTO (R_PPC64_PLTREL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_PLTREL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
618 the symbol. */
619 HOWTO (R_PPC64_PLT16_LO, /* type */
620 0, /* rightshift */
621 1, /* size (0 = byte, 1 = short, 2 = long) */
622 16, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc64_elf_unhandled_reloc, /* special_function */
627 "R_PPC64_PLT16_LO", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
634 the symbol. */
635 HOWTO (R_PPC64_PLT16_HI, /* type */
636 16, /* rightshift */
637 1, /* size (0 = byte, 1 = short, 2 = long) */
638 16, /* bitsize */
639 FALSE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc64_elf_unhandled_reloc, /* special_function */
643 "R_PPC64_PLT16_HI", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0xffff, /* dst_mask */
647 FALSE), /* pcrel_offset */
648
649 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC64_PLT16_HA, /* type */
652 16, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc64_elf_unhandled_reloc, /* special_function */
659 "R_PPC64_PLT16_HA", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* 16-bit section relative relocation. */
666 HOWTO (R_PPC64_SECTOFF, /* type */
667 0, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_bitfield, /* complain_on_overflow */
673 ppc64_elf_sectoff_reloc, /* special_function */
674 "R_PPC64_SECTOFF", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_SECTOFF, but no overflow warning. */
681 HOWTO (R_PPC64_SECTOFF_LO, /* type */
682 0, /* rightshift */
683 1, /* size (0 = byte, 1 = short, 2 = long) */
684 16, /* bitsize */
685 FALSE, /* pc_relative */
686 0, /* bitpos */
687 complain_overflow_dont, /* complain_on_overflow */
688 ppc64_elf_sectoff_reloc, /* special_function */
689 "R_PPC64_SECTOFF_LO", /* name */
690 FALSE, /* partial_inplace */
691 0, /* src_mask */
692 0xffff, /* dst_mask */
693 FALSE), /* pcrel_offset */
694
695 /* 16-bit upper half section relative relocation. */
696 HOWTO (R_PPC64_SECTOFF_HI, /* type */
697 16, /* rightshift */
698 1, /* size (0 = byte, 1 = short, 2 = long) */
699 16, /* bitsize */
700 FALSE, /* pc_relative */
701 0, /* bitpos */
702 complain_overflow_dont, /* complain_on_overflow */
703 ppc64_elf_sectoff_reloc, /* special_function */
704 "R_PPC64_SECTOFF_HI", /* name */
705 FALSE, /* partial_inplace */
706 0, /* src_mask */
707 0xffff, /* dst_mask */
708 FALSE), /* pcrel_offset */
709
710 /* 16-bit upper half adjusted section relative relocation. */
711 HOWTO (R_PPC64_SECTOFF_HA, /* type */
712 16, /* rightshift */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
714 16, /* bitsize */
715 FALSE, /* pc_relative */
716 0, /* bitpos */
717 complain_overflow_dont, /* complain_on_overflow */
718 ppc64_elf_sectoff_ha_reloc, /* special_function */
719 "R_PPC64_SECTOFF_HA", /* name */
720 FALSE, /* partial_inplace */
721 0, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
724
725 /* Like R_PPC64_REL24 without touching the two least significant bits. */
726 HOWTO (R_PPC64_REL30, /* type */
727 2, /* rightshift */
728 2, /* size (0 = byte, 1 = short, 2 = long) */
729 30, /* bitsize */
730 TRUE, /* pc_relative */
731 0, /* bitpos */
732 complain_overflow_dont, /* complain_on_overflow */
733 bfd_elf_generic_reloc, /* special_function */
734 "R_PPC64_REL30", /* name */
735 FALSE, /* partial_inplace */
736 0, /* src_mask */
737 0xfffffffc, /* dst_mask */
738 TRUE), /* pcrel_offset */
739
740 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
741
742 /* A standard 64-bit relocation. */
743 HOWTO (R_PPC64_ADDR64, /* type */
744 0, /* rightshift */
745 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
746 64, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_PPC64_ADDR64", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 ONES (64), /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* The bits 32-47 of an address. */
758 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
759 32, /* rightshift */
760 1, /* size (0 = byte, 1 = short, 2 = long) */
761 16, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_dont, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_PPC64_ADDR16_HIGHER", /* name */
767 FALSE, /* partial_inplace */
768 0, /* src_mask */
769 0xffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 /* The bits 32-47 of an address, plus 1 if the contents of the low
773 16 bits, treated as a signed number, is negative. */
774 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
775 32, /* rightshift */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
777 16, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 ppc64_elf_ha_reloc, /* special_function */
782 "R_PPC64_ADDR16_HIGHERA", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 48-63 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
790 48, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHEST", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 48-63 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
806 48, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHESTA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* Like ADDR64, but may be unaligned. */
820 HOWTO (R_PPC64_UADDR64, /* type */
821 0, /* rightshift */
822 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
823 64, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_UADDR64", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 ONES (64), /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* 64-bit relative relocation. */
835 HOWTO (R_PPC64_REL64, /* type */
836 0, /* rightshift */
837 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
838 64, /* bitsize */
839 TRUE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 bfd_elf_generic_reloc, /* special_function */
843 "R_PPC64_REL64", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 ONES (64), /* dst_mask */
847 TRUE), /* pcrel_offset */
848
849 /* 64-bit relocation to the symbol's procedure linkage table. */
850 HOWTO (R_PPC64_PLT64, /* type */
851 0, /* rightshift */
852 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
853 64, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_dont, /* complain_on_overflow */
857 ppc64_elf_unhandled_reloc, /* special_function */
858 "R_PPC64_PLT64", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 ONES (64), /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* 64-bit PC relative relocation to the symbol's procedure linkage
865 table. */
866 /* FIXME: R_PPC64_PLTREL64 not supported. */
867 HOWTO (R_PPC64_PLTREL64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 TRUE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 ppc64_elf_unhandled_reloc, /* special_function */
875 "R_PPC64_PLTREL64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 TRUE), /* pcrel_offset */
880
881 /* 16 bit TOC-relative relocation. */
882
883 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
884 HOWTO (R_PPC64_TOC16, /* type */
885 0, /* rightshift */
886 1, /* size (0 = byte, 1 = short, 2 = long) */
887 16, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_signed, /* complain_on_overflow */
891 ppc64_elf_toc_reloc, /* special_function */
892 "R_PPC64_TOC16", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 0xffff, /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* 16 bit TOC-relative relocation without overflow. */
899
900 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
901 HOWTO (R_PPC64_TOC16_LO, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_dont, /* complain_on_overflow */
908 ppc64_elf_toc_reloc, /* special_function */
909 "R_PPC64_TOC16_LO", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation, high 16 bits. */
916
917 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
918 HOWTO (R_PPC64_TOC16_HI, /* type */
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16_HI", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
933 contents of the low 16 bits, treated as a signed number, is
934 negative. */
935
936 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
937 HOWTO (R_PPC64_TOC16_HA, /* type */
938 16, /* rightshift */
939 1, /* size (0 = byte, 1 = short, 2 = long) */
940 16, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_dont, /* complain_on_overflow */
944 ppc64_elf_toc_ha_reloc, /* special_function */
945 "R_PPC64_TOC16_HA", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 0xffff, /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* 64-bit relocation; insert value of TOC base (.TOC.). */
952
953 /* R_PPC64_TOC 51 doubleword64 .TOC. */
954 HOWTO (R_PPC64_TOC, /* type */
955 0, /* rightshift */
956 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
957 64, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_bitfield, /* complain_on_overflow */
961 ppc64_elf_toc64_reloc, /* special_function */
962 "R_PPC64_TOC", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 ONES (64), /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* Like R_PPC64_GOT16, but also informs the link editor that the
969 value to relocate may (!) refer to a PLT entry which the link
970 editor (a) may replace with the symbol value. If the link editor
971 is unable to fully resolve the symbol, it may (b) create a PLT
972 entry and store the address to the new PLT entry in the GOT.
973 This permits lazy resolution of function symbols at run time.
974 The link editor may also skip all of this and just (c) emit a
975 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
976 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
977 HOWTO (R_PPC64_PLTGOT16, /* type */
978 0, /* rightshift */
979 1, /* size (0 = byte, 1 = short, 2 = long) */
980 16, /* bitsize */
981 FALSE, /* pc_relative */
982 0, /* bitpos */
983 complain_overflow_signed, /* complain_on_overflow */
984 ppc64_elf_unhandled_reloc, /* special_function */
985 "R_PPC64_PLTGOT16", /* name */
986 FALSE, /* partial_inplace */
987 0, /* src_mask */
988 0xffff, /* dst_mask */
989 FALSE), /* pcrel_offset */
990
991 /* Like R_PPC64_PLTGOT16, but without overflow. */
992 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
993 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
994 0, /* rightshift */
995 1, /* size (0 = byte, 1 = short, 2 = long) */
996 16, /* bitsize */
997 FALSE, /* pc_relative */
998 0, /* bitpos */
999 complain_overflow_dont, /* complain_on_overflow */
1000 ppc64_elf_unhandled_reloc, /* special_function */
1001 "R_PPC64_PLTGOT16_LO", /* name */
1002 FALSE, /* partial_inplace */
1003 0, /* src_mask */
1004 0xffff, /* dst_mask */
1005 FALSE), /* pcrel_offset */
1006
1007 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1008 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1009 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1010 16, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_dont, /* complain_on_overflow */
1016 ppc64_elf_unhandled_reloc, /* special_function */
1017 "R_PPC64_PLTGOT16_HI", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1024 1 if the contents of the low 16 bits, treated as a signed number,
1025 is negative. */
1026 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1027 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont,/* complain_on_overflow */
1034 ppc64_elf_unhandled_reloc, /* special_function */
1035 "R_PPC64_PLTGOT16_HA", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1042 HOWTO (R_PPC64_ADDR16_DS, /* type */
1043 0, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_bitfield, /* complain_on_overflow */
1049 bfd_elf_generic_reloc, /* special_function */
1050 "R_PPC64_ADDR16_DS", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xfffc, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1057 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_dont,/* complain_on_overflow */
1064 bfd_elf_generic_reloc, /* special_function */
1065 "R_PPC64_ADDR16_LO_DS",/* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xfffc, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1072 HOWTO (R_PPC64_GOT16_DS, /* type */
1073 0, /* rightshift */
1074 1, /* size (0 = byte, 1 = short, 2 = long) */
1075 16, /* bitsize */
1076 FALSE, /* pc_relative */
1077 0, /* bitpos */
1078 complain_overflow_signed, /* complain_on_overflow */
1079 ppc64_elf_unhandled_reloc, /* special_function */
1080 "R_PPC64_GOT16_DS", /* name */
1081 FALSE, /* partial_inplace */
1082 0, /* src_mask */
1083 0xfffc, /* dst_mask */
1084 FALSE), /* pcrel_offset */
1085
1086 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1087 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1088 0, /* rightshift */
1089 1, /* size (0 = byte, 1 = short, 2 = long) */
1090 16, /* bitsize */
1091 FALSE, /* pc_relative */
1092 0, /* bitpos */
1093 complain_overflow_dont, /* complain_on_overflow */
1094 ppc64_elf_unhandled_reloc, /* special_function */
1095 "R_PPC64_GOT16_LO_DS", /* name */
1096 FALSE, /* partial_inplace */
1097 0, /* src_mask */
1098 0xfffc, /* dst_mask */
1099 FALSE), /* pcrel_offset */
1100
1101 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1102 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1103 0, /* rightshift */
1104 1, /* size (0 = byte, 1 = short, 2 = long) */
1105 16, /* bitsize */
1106 FALSE, /* pc_relative */
1107 0, /* bitpos */
1108 complain_overflow_dont, /* complain_on_overflow */
1109 ppc64_elf_unhandled_reloc, /* special_function */
1110 "R_PPC64_PLT16_LO_DS", /* name */
1111 FALSE, /* partial_inplace */
1112 0, /* src_mask */
1113 0xfffc, /* dst_mask */
1114 FALSE), /* pcrel_offset */
1115
1116 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1117 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1118 0, /* rightshift */
1119 1, /* size (0 = byte, 1 = short, 2 = long) */
1120 16, /* bitsize */
1121 FALSE, /* pc_relative */
1122 0, /* bitpos */
1123 complain_overflow_bitfield, /* complain_on_overflow */
1124 ppc64_elf_sectoff_reloc, /* special_function */
1125 "R_PPC64_SECTOFF_DS", /* name */
1126 FALSE, /* partial_inplace */
1127 0, /* src_mask */
1128 0xfffc, /* dst_mask */
1129 FALSE), /* pcrel_offset */
1130
1131 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1132 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1133 0, /* rightshift */
1134 1, /* size (0 = byte, 1 = short, 2 = long) */
1135 16, /* bitsize */
1136 FALSE, /* pc_relative */
1137 0, /* bitpos */
1138 complain_overflow_dont, /* complain_on_overflow */
1139 ppc64_elf_sectoff_reloc, /* special_function */
1140 "R_PPC64_SECTOFF_LO_DS",/* name */
1141 FALSE, /* partial_inplace */
1142 0, /* src_mask */
1143 0xfffc, /* dst_mask */
1144 FALSE), /* pcrel_offset */
1145
1146 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1147 HOWTO (R_PPC64_TOC16_DS, /* type */
1148 0, /* rightshift */
1149 1, /* size (0 = byte, 1 = short, 2 = long) */
1150 16, /* bitsize */
1151 FALSE, /* pc_relative */
1152 0, /* bitpos */
1153 complain_overflow_signed, /* complain_on_overflow */
1154 ppc64_elf_toc_reloc, /* special_function */
1155 "R_PPC64_TOC16_DS", /* name */
1156 FALSE, /* partial_inplace */
1157 0, /* src_mask */
1158 0xfffc, /* dst_mask */
1159 FALSE), /* pcrel_offset */
1160
1161 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1162 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1163 0, /* rightshift */
1164 1, /* size (0 = byte, 1 = short, 2 = long) */
1165 16, /* bitsize */
1166 FALSE, /* pc_relative */
1167 0, /* bitpos */
1168 complain_overflow_dont, /* complain_on_overflow */
1169 ppc64_elf_toc_reloc, /* special_function */
1170 "R_PPC64_TOC16_LO_DS", /* name */
1171 FALSE, /* partial_inplace */
1172 0, /* src_mask */
1173 0xfffc, /* dst_mask */
1174 FALSE), /* pcrel_offset */
1175
1176 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1177 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1178 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_unhandled_reloc, /* special_function */
1186 "R_PPC64_PLTGOT16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1193 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1194 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1195 0, /* rightshift */
1196 1, /* size (0 = byte, 1 = short, 2 = long) */
1197 16, /* bitsize */
1198 FALSE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_dont, /* complain_on_overflow */
1201 ppc64_elf_unhandled_reloc, /* special_function */
1202 "R_PPC64_PLTGOT16_LO_DS",/* name */
1203 FALSE, /* partial_inplace */
1204 0, /* src_mask */
1205 0xfffc, /* dst_mask */
1206 FALSE), /* pcrel_offset */
1207
1208 /* Marker reloc for TLS. */
1209 HOWTO (R_PPC64_TLS,
1210 0, /* rightshift */
1211 2, /* size (0 = byte, 1 = short, 2 = long) */
1212 32, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_dont, /* complain_on_overflow */
1216 bfd_elf_generic_reloc, /* special_function */
1217 "R_PPC64_TLS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Computes the load module index of the load module that contains the
1224 definition of its TLS sym. */
1225 HOWTO (R_PPC64_DTPMOD64,
1226 0, /* rightshift */
1227 4, /* size (0 = byte, 1 = short, 2 = long) */
1228 64, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_DTPMOD64", /* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 ONES (64), /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Computes a dtv-relative displacement, the difference between the value
1240 of sym+add and the base address of the thread-local storage block that
1241 contains the definition of sym, minus 0x8000. */
1242 HOWTO (R_PPC64_DTPREL64,
1243 0, /* rightshift */
1244 4, /* size (0 = byte, 1 = short, 2 = long) */
1245 64, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_dont, /* complain_on_overflow */
1249 ppc64_elf_unhandled_reloc, /* special_function */
1250 "R_PPC64_DTPREL64", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 ONES (64), /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* A 16 bit dtprel reloc. */
1257 HOWTO (R_PPC64_DTPREL16,
1258 0, /* rightshift */
1259 1, /* size (0 = byte, 1 = short, 2 = long) */
1260 16, /* bitsize */
1261 FALSE, /* pc_relative */
1262 0, /* bitpos */
1263 complain_overflow_signed, /* complain_on_overflow */
1264 ppc64_elf_unhandled_reloc, /* special_function */
1265 "R_PPC64_DTPREL16", /* name */
1266 FALSE, /* partial_inplace */
1267 0, /* src_mask */
1268 0xffff, /* dst_mask */
1269 FALSE), /* pcrel_offset */
1270
1271 /* Like DTPREL16, but no overflow. */
1272 HOWTO (R_PPC64_DTPREL16_LO,
1273 0, /* rightshift */
1274 1, /* size (0 = byte, 1 = short, 2 = long) */
1275 16, /* bitsize */
1276 FALSE, /* pc_relative */
1277 0, /* bitpos */
1278 complain_overflow_dont, /* complain_on_overflow */
1279 ppc64_elf_unhandled_reloc, /* special_function */
1280 "R_PPC64_DTPREL16_LO", /* name */
1281 FALSE, /* partial_inplace */
1282 0, /* src_mask */
1283 0xffff, /* dst_mask */
1284 FALSE), /* pcrel_offset */
1285
1286 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1287 HOWTO (R_PPC64_DTPREL16_HI,
1288 16, /* rightshift */
1289 1, /* size (0 = byte, 1 = short, 2 = long) */
1290 16, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
1293 complain_overflow_dont, /* complain_on_overflow */
1294 ppc64_elf_unhandled_reloc, /* special_function */
1295 "R_PPC64_DTPREL16_HI", /* name */
1296 FALSE, /* partial_inplace */
1297 0, /* src_mask */
1298 0xffff, /* dst_mask */
1299 FALSE), /* pcrel_offset */
1300
1301 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1302 HOWTO (R_PPC64_DTPREL16_HA,
1303 16, /* rightshift */
1304 1, /* size (0 = byte, 1 = short, 2 = long) */
1305 16, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_dont, /* complain_on_overflow */
1309 ppc64_elf_unhandled_reloc, /* special_function */
1310 "R_PPC64_DTPREL16_HA", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 0xffff, /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1317 HOWTO (R_PPC64_DTPREL16_HIGHER,
1318 32, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 ppc64_elf_unhandled_reloc, /* special_function */
1325 "R_PPC64_DTPREL16_HIGHER", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1332 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1333 32, /* rightshift */
1334 1, /* size (0 = byte, 1 = short, 2 = long) */
1335 16, /* bitsize */
1336 FALSE, /* pc_relative */
1337 0, /* bitpos */
1338 complain_overflow_dont, /* complain_on_overflow */
1339 ppc64_elf_unhandled_reloc, /* special_function */
1340 "R_PPC64_DTPREL16_HIGHERA", /* name */
1341 FALSE, /* partial_inplace */
1342 0, /* src_mask */
1343 0xffff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1347 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1348 48, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPREL16_HIGHEST", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1362 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1363 48, /* rightshift */
1364 1, /* size (0 = byte, 1 = short, 2 = long) */
1365 16, /* bitsize */
1366 FALSE, /* pc_relative */
1367 0, /* bitpos */
1368 complain_overflow_dont, /* complain_on_overflow */
1369 ppc64_elf_unhandled_reloc, /* special_function */
1370 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1371 FALSE, /* partial_inplace */
1372 0, /* src_mask */
1373 0xffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1375
1376 /* Like DTPREL16, but for insns with a DS field. */
1377 HOWTO (R_PPC64_DTPREL16_DS,
1378 0, /* rightshift */
1379 1, /* size (0 = byte, 1 = short, 2 = long) */
1380 16, /* bitsize */
1381 FALSE, /* pc_relative */
1382 0, /* bitpos */
1383 complain_overflow_signed, /* complain_on_overflow */
1384 ppc64_elf_unhandled_reloc, /* special_function */
1385 "R_PPC64_DTPREL16_DS", /* name */
1386 FALSE, /* partial_inplace */
1387 0, /* src_mask */
1388 0xfffc, /* dst_mask */
1389 FALSE), /* pcrel_offset */
1390
1391 /* Like DTPREL16_DS, but no overflow. */
1392 HOWTO (R_PPC64_DTPREL16_LO_DS,
1393 0, /* rightshift */
1394 1, /* size (0 = byte, 1 = short, 2 = long) */
1395 16, /* bitsize */
1396 FALSE, /* pc_relative */
1397 0, /* bitpos */
1398 complain_overflow_dont, /* complain_on_overflow */
1399 ppc64_elf_unhandled_reloc, /* special_function */
1400 "R_PPC64_DTPREL16_LO_DS", /* name */
1401 FALSE, /* partial_inplace */
1402 0, /* src_mask */
1403 0xfffc, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1405
1406 /* Computes a tp-relative displacement, the difference between the value of
1407 sym+add and the value of the thread pointer (r13). */
1408 HOWTO (R_PPC64_TPREL64,
1409 0, /* rightshift */
1410 4, /* size (0 = byte, 1 = short, 2 = long) */
1411 64, /* bitsize */
1412 FALSE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_dont, /* complain_on_overflow */
1415 ppc64_elf_unhandled_reloc, /* special_function */
1416 "R_PPC64_TPREL64", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 ONES (64), /* dst_mask */
1420 FALSE), /* pcrel_offset */
1421
1422 /* A 16 bit tprel reloc. */
1423 HOWTO (R_PPC64_TPREL16,
1424 0, /* rightshift */
1425 1, /* size (0 = byte, 1 = short, 2 = long) */
1426 16, /* bitsize */
1427 FALSE, /* pc_relative */
1428 0, /* bitpos */
1429 complain_overflow_signed, /* complain_on_overflow */
1430 ppc64_elf_unhandled_reloc, /* special_function */
1431 "R_PPC64_TPREL16", /* name */
1432 FALSE, /* partial_inplace */
1433 0, /* src_mask */
1434 0xffff, /* dst_mask */
1435 FALSE), /* pcrel_offset */
1436
1437 /* Like TPREL16, but no overflow. */
1438 HOWTO (R_PPC64_TPREL16_LO,
1439 0, /* rightshift */
1440 1, /* size (0 = byte, 1 = short, 2 = long) */
1441 16, /* bitsize */
1442 FALSE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_dont, /* complain_on_overflow */
1445 ppc64_elf_unhandled_reloc, /* special_function */
1446 "R_PPC64_TPREL16_LO", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 0xffff, /* dst_mask */
1450 FALSE), /* pcrel_offset */
1451
1452 /* Like TPREL16_LO, but next higher group of 16 bits. */
1453 HOWTO (R_PPC64_TPREL16_HI,
1454 16, /* rightshift */
1455 1, /* size (0 = byte, 1 = short, 2 = long) */
1456 16, /* bitsize */
1457 FALSE, /* pc_relative */
1458 0, /* bitpos */
1459 complain_overflow_dont, /* complain_on_overflow */
1460 ppc64_elf_unhandled_reloc, /* special_function */
1461 "R_PPC64_TPREL16_HI", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0xffff, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* Like TPREL16_HI, but adjust for low 16 bits. */
1468 HOWTO (R_PPC64_TPREL16_HA,
1469 16, /* rightshift */
1470 1, /* size (0 = byte, 1 = short, 2 = long) */
1471 16, /* bitsize */
1472 FALSE, /* pc_relative */
1473 0, /* bitpos */
1474 complain_overflow_dont, /* complain_on_overflow */
1475 ppc64_elf_unhandled_reloc, /* special_function */
1476 "R_PPC64_TPREL16_HA", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 0xffff, /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* Like TPREL16_HI, but next higher group of 16 bits. */
1483 HOWTO (R_PPC64_TPREL16_HIGHER,
1484 32, /* rightshift */
1485 1, /* size (0 = byte, 1 = short, 2 = long) */
1486 16, /* bitsize */
1487 FALSE, /* pc_relative */
1488 0, /* bitpos */
1489 complain_overflow_dont, /* complain_on_overflow */
1490 ppc64_elf_unhandled_reloc, /* special_function */
1491 "R_PPC64_TPREL16_HIGHER", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0xffff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1498 HOWTO (R_PPC64_TPREL16_HIGHERA,
1499 32, /* rightshift */
1500 1, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_dont, /* complain_on_overflow */
1505 ppc64_elf_unhandled_reloc, /* special_function */
1506 "R_PPC64_TPREL16_HIGHERA", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1513 HOWTO (R_PPC64_TPREL16_HIGHEST,
1514 48, /* rightshift */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1516 16, /* bitsize */
1517 FALSE, /* pc_relative */
1518 0, /* bitpos */
1519 complain_overflow_dont, /* complain_on_overflow */
1520 ppc64_elf_unhandled_reloc, /* special_function */
1521 "R_PPC64_TPREL16_HIGHEST", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0xffff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1528 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1529 48, /* rightshift */
1530 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_dont, /* complain_on_overflow */
1535 ppc64_elf_unhandled_reloc, /* special_function */
1536 "R_PPC64_TPREL16_HIGHESTA", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Like TPREL16, but for insns with a DS field. */
1543 HOWTO (R_PPC64_TPREL16_DS,
1544 0, /* rightshift */
1545 1, /* size (0 = byte, 1 = short, 2 = long) */
1546 16, /* bitsize */
1547 FALSE, /* pc_relative */
1548 0, /* bitpos */
1549 complain_overflow_signed, /* complain_on_overflow */
1550 ppc64_elf_unhandled_reloc, /* special_function */
1551 "R_PPC64_TPREL16_DS", /* name */
1552 FALSE, /* partial_inplace */
1553 0, /* src_mask */
1554 0xfffc, /* dst_mask */
1555 FALSE), /* pcrel_offset */
1556
1557 /* Like TPREL16_DS, but no overflow. */
1558 HOWTO (R_PPC64_TPREL16_LO_DS,
1559 0, /* rightshift */
1560 1, /* size (0 = byte, 1 = short, 2 = long) */
1561 16, /* bitsize */
1562 FALSE, /* pc_relative */
1563 0, /* bitpos */
1564 complain_overflow_dont, /* complain_on_overflow */
1565 ppc64_elf_unhandled_reloc, /* special_function */
1566 "R_PPC64_TPREL16_LO_DS", /* name */
1567 FALSE, /* partial_inplace */
1568 0, /* src_mask */
1569 0xfffc, /* dst_mask */
1570 FALSE), /* pcrel_offset */
1571
1572 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1573 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1574 to the first entry relative to the TOC base (r2). */
1575 HOWTO (R_PPC64_GOT_TLSGD16,
1576 0, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_signed, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_GOT_TLSGD16", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like GOT_TLSGD16, but no overflow. */
1590 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1591 0, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_dont, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_GOT_TLSGD16_LO", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1605 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1606 16, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_GOT_TLSGD16_HI", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1620 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1621 16, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_GOT_TLSGD16_HA", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1635 with values (sym+add)@dtpmod and zero, and computes the offset to the
1636 first entry relative to the TOC base (r2). */
1637 HOWTO (R_PPC64_GOT_TLSLD16,
1638 0, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_signed, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSLD16", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Like GOT_TLSLD16, but no overflow. */
1652 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1653 0, /* rightshift */
1654 1, /* size (0 = byte, 1 = short, 2 = long) */
1655 16, /* bitsize */
1656 FALSE, /* pc_relative */
1657 0, /* bitpos */
1658 complain_overflow_dont, /* complain_on_overflow */
1659 ppc64_elf_unhandled_reloc, /* special_function */
1660 "R_PPC64_GOT_TLSLD16_LO", /* name */
1661 FALSE, /* partial_inplace */
1662 0, /* src_mask */
1663 0xffff, /* dst_mask */
1664 FALSE), /* pcrel_offset */
1665
1666 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1667 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1668 16, /* rightshift */
1669 1, /* size (0 = byte, 1 = short, 2 = long) */
1670 16, /* bitsize */
1671 FALSE, /* pc_relative */
1672 0, /* bitpos */
1673 complain_overflow_dont, /* complain_on_overflow */
1674 ppc64_elf_unhandled_reloc, /* special_function */
1675 "R_PPC64_GOT_TLSLD16_HI", /* name */
1676 FALSE, /* partial_inplace */
1677 0, /* src_mask */
1678 0xffff, /* dst_mask */
1679 FALSE), /* pcrel_offset */
1680
1681 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1682 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1683 16, /* rightshift */
1684 1, /* size (0 = byte, 1 = short, 2 = long) */
1685 16, /* bitsize */
1686 FALSE, /* pc_relative */
1687 0, /* bitpos */
1688 complain_overflow_dont, /* complain_on_overflow */
1689 ppc64_elf_unhandled_reloc, /* special_function */
1690 "R_PPC64_GOT_TLSLD16_HA", /* name */
1691 FALSE, /* partial_inplace */
1692 0, /* src_mask */
1693 0xffff, /* dst_mask */
1694 FALSE), /* pcrel_offset */
1695
1696 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1697 the offset to the entry relative to the TOC base (r2). */
1698 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1699 0, /* rightshift */
1700 1, /* size (0 = byte, 1 = short, 2 = long) */
1701 16, /* bitsize */
1702 FALSE, /* pc_relative */
1703 0, /* bitpos */
1704 complain_overflow_signed, /* complain_on_overflow */
1705 ppc64_elf_unhandled_reloc, /* special_function */
1706 "R_PPC64_GOT_DTPREL16_DS", /* name */
1707 FALSE, /* partial_inplace */
1708 0, /* src_mask */
1709 0xfffc, /* dst_mask */
1710 FALSE), /* pcrel_offset */
1711
1712 /* Like GOT_DTPREL16_DS, but no overflow. */
1713 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1714 0, /* rightshift */
1715 1, /* size (0 = byte, 1 = short, 2 = long) */
1716 16, /* bitsize */
1717 FALSE, /* pc_relative */
1718 0, /* bitpos */
1719 complain_overflow_dont, /* complain_on_overflow */
1720 ppc64_elf_unhandled_reloc, /* special_function */
1721 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1722 FALSE, /* partial_inplace */
1723 0, /* src_mask */
1724 0xfffc, /* dst_mask */
1725 FALSE), /* pcrel_offset */
1726
1727 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1728 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1729 16, /* rightshift */
1730 1, /* size (0 = byte, 1 = short, 2 = long) */
1731 16, /* bitsize */
1732 FALSE, /* pc_relative */
1733 0, /* bitpos */
1734 complain_overflow_dont, /* complain_on_overflow */
1735 ppc64_elf_unhandled_reloc, /* special_function */
1736 "R_PPC64_GOT_DTPREL16_HI", /* name */
1737 FALSE, /* partial_inplace */
1738 0, /* src_mask */
1739 0xffff, /* dst_mask */
1740 FALSE), /* pcrel_offset */
1741
1742 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1743 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1744 16, /* rightshift */
1745 1, /* size (0 = byte, 1 = short, 2 = long) */
1746 16, /* bitsize */
1747 FALSE, /* pc_relative */
1748 0, /* bitpos */
1749 complain_overflow_dont, /* complain_on_overflow */
1750 ppc64_elf_unhandled_reloc, /* special_function */
1751 "R_PPC64_GOT_DTPREL16_HA", /* name */
1752 FALSE, /* partial_inplace */
1753 0, /* src_mask */
1754 0xffff, /* dst_mask */
1755 FALSE), /* pcrel_offset */
1756
1757 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1758 offset to the entry relative to the TOC base (r2). */
1759 HOWTO (R_PPC64_GOT_TPREL16_DS,
1760 0, /* rightshift */
1761 1, /* size (0 = byte, 1 = short, 2 = long) */
1762 16, /* bitsize */
1763 FALSE, /* pc_relative */
1764 0, /* bitpos */
1765 complain_overflow_signed, /* complain_on_overflow */
1766 ppc64_elf_unhandled_reloc, /* special_function */
1767 "R_PPC64_GOT_TPREL16_DS", /* name */
1768 FALSE, /* partial_inplace */
1769 0, /* src_mask */
1770 0xfffc, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1772
1773 /* Like GOT_TPREL16_DS, but no overflow. */
1774 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_dont, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xfffc, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1789 HOWTO (R_PPC64_GOT_TPREL16_HI,
1790 16, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_dont, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TPREL16_HI", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xffff, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1804 HOWTO (R_PPC64_GOT_TPREL16_HA,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_dont, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TPREL16_HA", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* GNU extension to record C++ vtable hierarchy. */
1819 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1820 0, /* rightshift */
1821 0, /* size (0 = byte, 1 = short, 2 = long) */
1822 0, /* bitsize */
1823 FALSE, /* pc_relative */
1824 0, /* bitpos */
1825 complain_overflow_dont, /* complain_on_overflow */
1826 NULL, /* special_function */
1827 "R_PPC64_GNU_VTINHERIT", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* GNU extension to record C++ vtable member usage. */
1834 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1835 0, /* rightshift */
1836 0, /* size (0 = byte, 1 = short, 2 = long) */
1837 0, /* bitsize */
1838 FALSE, /* pc_relative */
1839 0, /* bitpos */
1840 complain_overflow_dont, /* complain_on_overflow */
1841 NULL, /* special_function */
1842 "R_PPC64_GNU_VTENTRY", /* name */
1843 FALSE, /* partial_inplace */
1844 0, /* src_mask */
1845 0, /* dst_mask */
1846 FALSE), /* pcrel_offset */
1847 };
1848
1849 \f
1850 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1851 be done. */
1852
1853 static void
1854 ppc_howto_init (void)
1855 {
1856 unsigned int i, type;
1857
1858 for (i = 0;
1859 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1860 i++)
1861 {
1862 type = ppc64_elf_howto_raw[i].type;
1863 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1864 / sizeof (ppc64_elf_howto_table[0])));
1865 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1866 }
1867 }
1868
1869 static reloc_howto_type *
1870 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1871 bfd_reloc_code_real_type code)
1872 {
1873 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1874
1875 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1876 /* Initialize howto table if needed. */
1877 ppc_howto_init ();
1878
1879 switch (code)
1880 {
1881 default:
1882 return NULL;
1883
1884 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1885 break;
1886 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1887 break;
1888 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1889 break;
1890 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1891 break;
1892 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1893 break;
1894 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1895 break;
1896 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1897 break;
1898 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1899 break;
1900 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1901 break;
1902 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1903 break;
1904 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1905 break;
1906 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1907 break;
1908 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1909 break;
1910 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1911 break;
1912 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1913 break;
1914 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1915 break;
1916 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1917 break;
1918 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1919 break;
1920 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1921 break;
1922 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1923 break;
1924 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1925 break;
1926 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1927 break;
1928 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1929 break;
1930 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1931 break;
1932 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1933 break;
1934 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1935 break;
1936 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1937 break;
1938 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1939 break;
1940 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1941 break;
1942 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1943 break;
1944 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1945 break;
1946 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1947 break;
1948 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1949 break;
1950 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1951 break;
1952 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1953 break;
1954 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1955 break;
1956 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1957 break;
1958 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1959 break;
1960 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1961 break;
1962 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1963 break;
1964 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1965 break;
1966 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1967 break;
1968 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1969 break;
1970 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1971 break;
1972 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1973 break;
1974 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1975 break;
1976 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1977 break;
1978 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1979 break;
1980 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1981 break;
1982 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1983 break;
1984 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1985 break;
1986 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1987 break;
1988 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1989 break;
1990 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1991 break;
1992 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1993 break;
1994 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1995 break;
1996 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
1997 break;
1998 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
1999 break;
2000 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2001 break;
2002 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2003 break;
2004 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2005 break;
2006 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2007 break;
2008 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2009 break;
2010 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2011 break;
2012 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2013 break;
2014 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2015 break;
2016 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2017 break;
2018 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2019 break;
2020 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2021 break;
2022 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2023 break;
2024 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2025 break;
2026 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2027 break;
2028 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2029 break;
2030 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2031 break;
2032 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2033 break;
2034 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2035 break;
2036 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2037 break;
2038 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2039 break;
2040 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2041 break;
2042 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2043 break;
2044 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2045 break;
2046 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2047 break;
2048 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2049 break;
2050 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2051 break;
2052 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2053 break;
2054 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2055 break;
2056 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2057 break;
2058 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2059 break;
2060 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2061 break;
2062 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2063 break;
2064 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2065 break;
2066 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2067 break;
2068 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2069 break;
2070 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2071 break;
2072 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2073 break;
2074 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2075 break;
2076 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2077 break;
2078 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2079 break;
2080 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2081 break;
2082 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2083 break;
2084 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2085 break;
2086 }
2087
2088 return ppc64_elf_howto_table[r];
2089 };
2090
2091 /* Set the howto pointer for a PowerPC ELF reloc. */
2092
2093 static void
2094 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2095 Elf_Internal_Rela *dst)
2096 {
2097 unsigned int type;
2098
2099 /* Initialize howto table if needed. */
2100 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2101 ppc_howto_init ();
2102
2103 type = ELF64_R_TYPE (dst->r_info);
2104 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2105 / sizeof (ppc64_elf_howto_table[0])));
2106 cache_ptr->howto = ppc64_elf_howto_table[type];
2107 }
2108
2109 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2110
2111 static bfd_reloc_status_type
2112 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2113 void *data, asection *input_section,
2114 bfd *output_bfd, char **error_message)
2115 {
2116 /* If this is a relocatable link (output_bfd test tells us), just
2117 call the generic function. Any adjustment will be done at final
2118 link time. */
2119 if (output_bfd != NULL)
2120 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2121 input_section, output_bfd, error_message);
2122
2123 /* Adjust the addend for sign extension of the low 16 bits.
2124 We won't actually be using the low 16 bits, so trashing them
2125 doesn't matter. */
2126 reloc_entry->addend += 0x8000;
2127 return bfd_reloc_continue;
2128 }
2129
2130 static bfd_reloc_status_type
2131 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2132 void *data, asection *input_section,
2133 bfd *output_bfd, char **error_message)
2134 {
2135 long insn;
2136 enum elf_ppc64_reloc_type r_type;
2137 bfd_size_type octets;
2138 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2139 bfd_boolean is_power4 = FALSE;
2140
2141 /* If this is a relocatable link (output_bfd test tells us), just
2142 call the generic function. Any adjustment will be done at final
2143 link time. */
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 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2149 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2150 insn &= ~(0x01 << 21);
2151 r_type = reloc_entry->howto->type;
2152 if (r_type == R_PPC64_ADDR14_BRTAKEN
2153 || r_type == R_PPC64_REL14_BRTAKEN)
2154 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2155
2156 if (is_power4)
2157 {
2158 /* Set 'a' bit. This is 0b00010 in BO field for branch
2159 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2160 for branch on CTR insns (BO == 1a00t or 1a01t). */
2161 if ((insn & (0x14 << 21)) == (0x04 << 21))
2162 insn |= 0x02 << 21;
2163 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2164 insn |= 0x08 << 21;
2165 else
2166 return bfd_reloc_continue;
2167 }
2168 else
2169 {
2170 bfd_vma target = 0;
2171 bfd_vma from;
2172
2173 if (!bfd_is_com_section (symbol->section))
2174 target = symbol->value;
2175 target += symbol->section->output_section->vma;
2176 target += symbol->section->output_offset;
2177 target += reloc_entry->addend;
2178
2179 from = (reloc_entry->address
2180 + input_section->output_offset
2181 + input_section->output_section->vma);
2182
2183 /* Invert 'y' bit if not the default. */
2184 if ((bfd_signed_vma) (target - from) < 0)
2185 insn ^= 0x01 << 21;
2186 }
2187 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2188 return bfd_reloc_continue;
2189 }
2190
2191 static bfd_reloc_status_type
2192 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2193 void *data, asection *input_section,
2194 bfd *output_bfd, char **error_message)
2195 {
2196 /* If this is a relocatable link (output_bfd test tells us), just
2197 call the generic function. Any adjustment will be done at final
2198 link time. */
2199 if (output_bfd != NULL)
2200 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2201 input_section, output_bfd, error_message);
2202
2203 /* Subtract the symbol section base address. */
2204 reloc_entry->addend -= symbol->section->output_section->vma;
2205 return bfd_reloc_continue;
2206 }
2207
2208 static bfd_reloc_status_type
2209 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2210 void *data, asection *input_section,
2211 bfd *output_bfd, char **error_message)
2212 {
2213 /* If this is a relocatable link (output_bfd test tells us), just
2214 call the generic function. Any adjustment will be done at final
2215 link time. */
2216 if (output_bfd != NULL)
2217 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2218 input_section, output_bfd, error_message);
2219
2220 /* Subtract the symbol section base address. */
2221 reloc_entry->addend -= symbol->section->output_section->vma;
2222
2223 /* Adjust the addend for sign extension of the low 16 bits. */
2224 reloc_entry->addend += 0x8000;
2225 return bfd_reloc_continue;
2226 }
2227
2228 static bfd_reloc_status_type
2229 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2230 void *data, asection *input_section,
2231 bfd *output_bfd, char **error_message)
2232 {
2233 bfd_vma TOCstart;
2234
2235 /* If this is a relocatable link (output_bfd test tells us), just
2236 call the generic function. Any adjustment will be done at final
2237 link time. */
2238 if (output_bfd != NULL)
2239 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2240 input_section, output_bfd, error_message);
2241
2242 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2243 if (TOCstart == 0)
2244 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2245
2246 /* Subtract the TOC base address. */
2247 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2248 return bfd_reloc_continue;
2249 }
2250
2251 static bfd_reloc_status_type
2252 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2253 void *data, asection *input_section,
2254 bfd *output_bfd, char **error_message)
2255 {
2256 bfd_vma TOCstart;
2257
2258 /* If this is a relocatable link (output_bfd test tells us), just
2259 call the generic function. Any adjustment will be done at final
2260 link time. */
2261 if (output_bfd != NULL)
2262 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2263 input_section, output_bfd, error_message);
2264
2265 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2266 if (TOCstart == 0)
2267 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2268
2269 /* Subtract the TOC base address. */
2270 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2271
2272 /* Adjust the addend for sign extension of the low 16 bits. */
2273 reloc_entry->addend += 0x8000;
2274 return bfd_reloc_continue;
2275 }
2276
2277 static bfd_reloc_status_type
2278 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2279 void *data, asection *input_section,
2280 bfd *output_bfd, char **error_message)
2281 {
2282 bfd_vma TOCstart;
2283 bfd_size_type octets;
2284
2285 /* If this is a relocatable link (output_bfd test tells us), just
2286 call the generic function. Any adjustment will be done at final
2287 link time. */
2288 if (output_bfd != NULL)
2289 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2290 input_section, output_bfd, error_message);
2291
2292 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2293 if (TOCstart == 0)
2294 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2295
2296 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2297 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2298 return bfd_reloc_ok;
2299 }
2300
2301 static bfd_reloc_status_type
2302 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2303 void *data, asection *input_section,
2304 bfd *output_bfd, char **error_message)
2305 {
2306 /* If this is a relocatable link (output_bfd test tells us), just
2307 call the generic function. Any adjustment will be done at final
2308 link time. */
2309 if (output_bfd != NULL)
2310 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2311 input_section, output_bfd, error_message);
2312
2313 if (error_message != NULL)
2314 {
2315 static char buf[60];
2316 sprintf (buf, "generic linker can't handle %s",
2317 reloc_entry->howto->name);
2318 *error_message = buf;
2319 }
2320 return bfd_reloc_dangerous;
2321 }
2322
2323 struct ppc64_elf_obj_tdata
2324 {
2325 struct elf_obj_tdata elf;
2326
2327 /* Shortcuts to dynamic linker sections. */
2328 asection *got;
2329 asection *relgot;
2330
2331 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2332 sections means we potentially need one of these for each input bfd. */
2333 union {
2334 bfd_signed_vma refcount;
2335 bfd_vma offset;
2336 } tlsld_got;
2337 };
2338
2339 #define ppc64_elf_tdata(bfd) \
2340 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2341
2342 #define ppc64_tlsld_got(bfd) \
2343 (&ppc64_elf_tdata (bfd)->tlsld_got)
2344
2345 /* Override the generic function because we store some extras. */
2346
2347 static bfd_boolean
2348 ppc64_elf_mkobject (bfd *abfd)
2349 {
2350 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2351 abfd->tdata.any = bfd_zalloc (abfd, amt);
2352 if (abfd->tdata.any == NULL)
2353 return FALSE;
2354 return TRUE;
2355 }
2356
2357 /* Fix bad default arch selected for a 64 bit input bfd when the
2358 default is 32 bit. */
2359
2360 static bfd_boolean
2361 ppc64_elf_object_p (bfd *abfd)
2362 {
2363 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2364 {
2365 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2366
2367 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2368 {
2369 /* Relies on arch after 32 bit default being 64 bit default. */
2370 abfd->arch_info = abfd->arch_info->next;
2371 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2372 }
2373 }
2374 return TRUE;
2375 }
2376
2377 /* Support for core dump NOTE sections. */
2378
2379 static bfd_boolean
2380 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2381 {
2382 size_t offset, raw_size;
2383
2384 if (note->descsz != 504)
2385 return FALSE;
2386
2387 /* pr_cursig */
2388 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2389
2390 /* pr_pid */
2391 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2392
2393 /* pr_reg */
2394 offset = 112;
2395 raw_size = 384;
2396
2397 /* Make a ".reg/999" section. */
2398 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2399 raw_size, note->descpos + offset);
2400 }
2401
2402 static bfd_boolean
2403 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2404 {
2405 if (note->descsz != 136)
2406 return FALSE;
2407
2408 elf_tdata (abfd)->core_program
2409 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2410 elf_tdata (abfd)->core_command
2411 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2412
2413 return TRUE;
2414 }
2415
2416 /* Merge backend specific data from an object file to the output
2417 object file when linking. */
2418
2419 static bfd_boolean
2420 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2421 {
2422 /* Check if we have the same endianess. */
2423 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2424 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2425 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2426 {
2427 const char *msg;
2428
2429 if (bfd_big_endian (ibfd))
2430 msg = _("%s: compiled for a big endian system "
2431 "and target is little endian");
2432 else
2433 msg = _("%s: compiled for a little endian system "
2434 "and target is big endian");
2435
2436 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2437
2438 bfd_set_error (bfd_error_wrong_format);
2439 return FALSE;
2440 }
2441
2442 return TRUE;
2443 }
2444
2445 /* Add extra PPC sections. */
2446
2447 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2448 {
2449 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2450 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2451 { ".plt", 4, 0, SHT_NOBITS, 0 },
2452 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2453 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2454 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2455 { NULL, 0, 0, 0, 0 }
2456 };
2457
2458 struct _ppc64_elf_section_data
2459 {
2460 struct bfd_elf_section_data elf;
2461
2462 /* An array with one entry for each opd function descriptor. */
2463 union
2464 {
2465 /* Points to the function code section for local opd entries. */
2466 asection **func_sec;
2467 /* After editing .opd, adjust references to opd local syms. */
2468 long *adjust;
2469 } opd;
2470
2471 /* An array for toc sections, indexed by offset/8.
2472 Specifies the relocation symbol index used at a given toc offset. */
2473 unsigned *t_symndx;
2474 };
2475
2476 #define ppc64_elf_section_data(sec) \
2477 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2478
2479 static bfd_boolean
2480 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2481 {
2482 struct _ppc64_elf_section_data *sdata;
2483 bfd_size_type amt = sizeof (*sdata);
2484
2485 sdata = bfd_zalloc (abfd, amt);
2486 if (sdata == NULL)
2487 return FALSE;
2488 sec->used_by_bfd = sdata;
2489
2490 return _bfd_elf_new_section_hook (abfd, sec);
2491 }
2492 \f
2493 /* The following functions are specific to the ELF linker, while
2494 functions above are used generally. Those named ppc64_elf_* are
2495 called by the main ELF linker code. They appear in this file more
2496 or less in the order in which they are called. eg.
2497 ppc64_elf_check_relocs is called early in the link process,
2498 ppc64_elf_finish_dynamic_sections is one of the last functions
2499 called.
2500
2501 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2502 functions have both a function code symbol and a function descriptor
2503 symbol. A call to foo in a relocatable object file looks like:
2504
2505 . .text
2506 . x:
2507 . bl .foo
2508 . nop
2509
2510 The function definition in another object file might be:
2511
2512 . .section .opd
2513 . foo: .quad .foo
2514 . .quad .TOC.@tocbase
2515 . .quad 0
2516 .
2517 . .text
2518 . .foo: blr
2519
2520 When the linker resolves the call during a static link, the branch
2521 unsurprisingly just goes to .foo and the .opd information is unused.
2522 If the function definition is in a shared library, things are a little
2523 different: The call goes via a plt call stub, the opd information gets
2524 copied to the plt, and the linker patches the nop.
2525
2526 . x:
2527 . bl .foo_stub
2528 . ld 2,40(1)
2529 .
2530 .
2531 . .foo_stub:
2532 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2533 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2534 . std 2,40(1) # this is the general idea
2535 . ld 11,0(12)
2536 . ld 2,8(12)
2537 . mtctr 11
2538 . ld 11,16(12)
2539 . bctr
2540 .
2541 . .section .plt
2542 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2543
2544 The "reloc ()" notation is supposed to indicate that the linker emits
2545 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2546 copying.
2547
2548 What are the difficulties here? Well, firstly, the relocations
2549 examined by the linker in check_relocs are against the function code
2550 sym .foo, while the dynamic relocation in the plt is emitted against
2551 the function descriptor symbol, foo. Somewhere along the line, we need
2552 to carefully copy dynamic link information from one symbol to the other.
2553 Secondly, the generic part of the elf linker will make .foo a dynamic
2554 symbol as is normal for most other backends. We need foo dynamic
2555 instead, at least for an application final link. However, when
2556 creating a shared library containing foo, we need to have both symbols
2557 dynamic so that references to .foo are satisfied during the early
2558 stages of linking. Otherwise the linker might decide to pull in a
2559 definition from some other object, eg. a static library. */
2560
2561 /* The linker needs to keep track of the number of relocs that it
2562 decides to copy as dynamic relocs in check_relocs for each symbol.
2563 This is so that it can later discard them if they are found to be
2564 unnecessary. We store the information in a field extending the
2565 regular ELF linker hash table. */
2566
2567 struct ppc_dyn_relocs
2568 {
2569 struct ppc_dyn_relocs *next;
2570
2571 /* The input section of the reloc. */
2572 asection *sec;
2573
2574 /* Total number of relocs copied for the input section. */
2575 bfd_size_type count;
2576
2577 /* Number of pc-relative relocs copied for the input section. */
2578 bfd_size_type pc_count;
2579 };
2580
2581 /* Track GOT entries needed for a given symbol. We might need more
2582 than one got entry per symbol. */
2583 struct got_entry
2584 {
2585 struct got_entry *next;
2586
2587 /* The symbol addend that we'll be placing in the GOT. */
2588 bfd_vma addend;
2589
2590 /* Unlike other ELF targets, we use separate GOT entries for the same
2591 symbol referenced from different input files. This is to support
2592 automatic multiple TOC/GOT sections, where the TOC base can vary
2593 from one input file to another.
2594
2595 Point to the BFD owning this GOT entry. */
2596 bfd *owner;
2597
2598 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2599 TLS_TPREL or TLS_DTPREL for tls entries. */
2600 char tls_type;
2601
2602 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2603 union
2604 {
2605 bfd_signed_vma refcount;
2606 bfd_vma offset;
2607 } got;
2608 };
2609
2610 /* The same for PLT. */
2611 struct plt_entry
2612 {
2613 struct plt_entry *next;
2614
2615 bfd_vma addend;
2616
2617 union
2618 {
2619 bfd_signed_vma refcount;
2620 bfd_vma offset;
2621 } plt;
2622 };
2623
2624 /* Of those relocs that might be copied as dynamic relocs, this macro
2625 selects those that must be copied when linking a shared library,
2626 even when the symbol is local. */
2627
2628 #define MUST_BE_DYN_RELOC(RTYPE) \
2629 ((RTYPE) != R_PPC64_REL32 \
2630 && (RTYPE) != R_PPC64_REL64 \
2631 && (RTYPE) != R_PPC64_REL30)
2632
2633 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2634 copying dynamic variables from a shared lib into an app's dynbss
2635 section, and instead use a dynamic relocation to point into the
2636 shared lib. With code that gcc generates, it's vital that this be
2637 enabled; In the PowerPC64 ABI, the address of a function is actually
2638 the address of a function descriptor, which resides in the .opd
2639 section. gcc uses the descriptor directly rather than going via the
2640 GOT as some other ABI's do, which means that initialized function
2641 pointers must reference the descriptor. Thus, a function pointer
2642 initialized to the address of a function in a shared library will
2643 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2644 redefines the function desctriptor symbol to point to the copy. This
2645 presents a problem as a plt entry for that function is also
2646 initialized from the function descriptor symbol and the copy reloc
2647 may not be initialized first. */
2648 #define ELIMINATE_COPY_RELOCS 1
2649
2650 /* Section name for stubs is the associated section name plus this
2651 string. */
2652 #define STUB_SUFFIX ".stub"
2653
2654 /* Linker stubs.
2655 ppc_stub_long_branch:
2656 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2657 destination, but a 24 bit branch in a stub section will reach.
2658 . b dest
2659
2660 ppc_stub_plt_branch:
2661 Similar to the above, but a 24 bit branch in the stub section won't
2662 reach its destination.
2663 . addis %r12,%r2,xxx@toc@ha
2664 . ld %r11,xxx@toc@l(%r12)
2665 . mtctr %r11
2666 . bctr
2667
2668 ppc_stub_plt_call:
2669 Used to call a function in a shared library.
2670 . addis %r12,%r2,xxx@toc@ha
2671 . std %r2,40(%r1)
2672 . ld %r11,xxx+0@toc@l(%r12)
2673 . ld %r2,xxx+8@toc@l(%r12)
2674 . mtctr %r11
2675 . ld %r11,xxx+16@toc@l(%r12)
2676 . bctr
2677
2678 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2679 code to adjust the value and save r2 to support multiple toc sections.
2680 A ppc_stub_long_branch with an r2 offset looks like:
2681 . std %r2,40(%r1)
2682 . addis %r2,%r2,off@ha
2683 . addi %r2,%r2,off@l
2684 . b dest
2685
2686 A ppc_stub_plt_branch with an r2 offset looks like:
2687 . std %r2,40(%r1)
2688 . addis %r12,%r2,xxx@toc@ha
2689 . ld %r11,xxx@toc@l(%r12)
2690 . addis %r2,%r2,off@ha
2691 . addi %r2,%r2,off@l
2692 . mtctr %r11
2693 . bctr
2694 */
2695
2696 enum ppc_stub_type {
2697 ppc_stub_none,
2698 ppc_stub_long_branch,
2699 ppc_stub_long_branch_r2off,
2700 ppc_stub_plt_branch,
2701 ppc_stub_plt_branch_r2off,
2702 ppc_stub_plt_call
2703 };
2704
2705 struct ppc_stub_hash_entry {
2706
2707 /* Base hash table entry structure. */
2708 struct bfd_hash_entry root;
2709
2710 enum ppc_stub_type stub_type;
2711
2712 /* The stub section. */
2713 asection *stub_sec;
2714
2715 /* Offset within stub_sec of the beginning of this stub. */
2716 bfd_vma stub_offset;
2717
2718 /* Given the symbol's value and its section we can determine its final
2719 value when building the stubs (so the stub knows where to jump. */
2720 bfd_vma target_value;
2721 asection *target_section;
2722
2723 /* The symbol table entry, if any, that this was derived from. */
2724 struct ppc_link_hash_entry *h;
2725
2726 /* And the reloc addend that this was derived from. */
2727 bfd_vma addend;
2728
2729 /* Where this stub is being called from, or, in the case of combined
2730 stub sections, the first input section in the group. */
2731 asection *id_sec;
2732 };
2733
2734 struct ppc_branch_hash_entry {
2735
2736 /* Base hash table entry structure. */
2737 struct bfd_hash_entry root;
2738
2739 /* Offset within .branch_lt. */
2740 unsigned int offset;
2741
2742 /* Generation marker. */
2743 unsigned int iter;
2744 };
2745
2746 struct ppc_link_hash_entry
2747 {
2748 struct elf_link_hash_entry elf;
2749
2750 /* A pointer to the most recently used stub hash entry against this
2751 symbol. */
2752 struct ppc_stub_hash_entry *stub_cache;
2753
2754 /* Track dynamic relocs copied for this symbol. */
2755 struct ppc_dyn_relocs *dyn_relocs;
2756
2757 /* Link between function code and descriptor symbols. */
2758 struct elf_link_hash_entry *oh;
2759
2760 /* Flag function code and descriptor symbols. */
2761 unsigned int is_func:1;
2762 unsigned int is_func_descriptor:1;
2763 unsigned int is_entry:1;
2764
2765 /* Contexts in which symbol is used in the GOT (or TOC).
2766 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2767 corresponding relocs are encountered during check_relocs.
2768 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2769 indicate the corresponding GOT entry type is not needed.
2770 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2771 a TPREL one. We use a separate flag rather than setting TPREL
2772 just for convenience in distinguishing the two cases. */
2773 #define TLS_GD 1 /* GD reloc. */
2774 #define TLS_LD 2 /* LD reloc. */
2775 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2776 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2777 #define TLS_TLS 16 /* Any TLS reloc. */
2778 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2779 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2780 char tls_mask;
2781 };
2782
2783 /* ppc64 ELF linker hash table. */
2784
2785 struct ppc_link_hash_table
2786 {
2787 struct elf_link_hash_table elf;
2788
2789 /* The stub hash table. */
2790 struct bfd_hash_table stub_hash_table;
2791
2792 /* Another hash table for plt_branch stubs. */
2793 struct bfd_hash_table branch_hash_table;
2794
2795 /* Linker stub bfd. */
2796 bfd *stub_bfd;
2797
2798 /* Linker call-backs. */
2799 asection * (*add_stub_section) (const char *, asection *);
2800 void (*layout_sections_again) (void);
2801
2802 /* Array to keep track of which stub sections have been created, and
2803 information on stub grouping. */
2804 struct map_stub {
2805 /* This is the section to which stubs in the group will be attached. */
2806 asection *link_sec;
2807 /* The stub section. */
2808 asection *stub_sec;
2809 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2810 bfd_vma toc_off;
2811 } *stub_group;
2812
2813 /* Support for multiple toc sections. */
2814 unsigned int no_multi_toc;
2815 unsigned int multi_toc_needed;
2816
2817 /* Temp used when calculating TOC pointers. */
2818 bfd_vma toc_curr;
2819
2820 /* Highest input section id. */
2821 int top_id;
2822
2823 /* Highest output section index. */
2824 int top_index;
2825
2826 /* List of input sections for each output section. */
2827 asection **input_list;
2828
2829 /* Short-cuts to get to dynamic linker sections. */
2830 asection *got;
2831 asection *plt;
2832 asection *relplt;
2833 asection *dynbss;
2834 asection *relbss;
2835 asection *glink;
2836 asection *sfpr;
2837 asection *brlt;
2838 asection *relbrlt;
2839
2840 /* Shortcut to .__tls_get_addr. */
2841 struct elf_link_hash_entry *tls_get_addr;
2842
2843 /* Statistics. */
2844 unsigned long stub_count[ppc_stub_plt_call];
2845
2846 /* Set if we should emit symbols for stubs. */
2847 unsigned int emit_stub_syms;
2848
2849 /* Set on error. */
2850 unsigned int stub_error;
2851
2852 /* Flag set when small branches are detected. Used to
2853 select suitable defaults for the stub group size. */
2854 unsigned int has_14bit_branch;
2855
2856 /* Set if we detect a reference undefined weak symbol. */
2857 unsigned int have_undefweak;
2858
2859 /* Incremented every time we size stubs. */
2860 unsigned int stub_iteration;
2861
2862 /* Small local sym to section mapping cache. */
2863 struct sym_sec_cache sym_sec;
2864 };
2865
2866 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2867
2868 #define ppc_hash_table(p) \
2869 ((struct ppc_link_hash_table *) ((p)->hash))
2870
2871 #define ppc_stub_hash_lookup(table, string, create, copy) \
2872 ((struct ppc_stub_hash_entry *) \
2873 bfd_hash_lookup ((table), (string), (create), (copy)))
2874
2875 #define ppc_branch_hash_lookup(table, string, create, copy) \
2876 ((struct ppc_branch_hash_entry *) \
2877 bfd_hash_lookup ((table), (string), (create), (copy)))
2878
2879 /* Create an entry in the stub hash table. */
2880
2881 static struct bfd_hash_entry *
2882 stub_hash_newfunc (struct bfd_hash_entry *entry,
2883 struct bfd_hash_table *table,
2884 const char *string)
2885 {
2886 /* Allocate the structure if it has not already been allocated by a
2887 subclass. */
2888 if (entry == NULL)
2889 {
2890 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2891 if (entry == NULL)
2892 return entry;
2893 }
2894
2895 /* Call the allocation method of the superclass. */
2896 entry = bfd_hash_newfunc (entry, table, string);
2897 if (entry != NULL)
2898 {
2899 struct ppc_stub_hash_entry *eh;
2900
2901 /* Initialize the local fields. */
2902 eh = (struct ppc_stub_hash_entry *) entry;
2903 eh->stub_type = ppc_stub_none;
2904 eh->stub_sec = NULL;
2905 eh->stub_offset = 0;
2906 eh->target_value = 0;
2907 eh->target_section = NULL;
2908 eh->h = NULL;
2909 eh->id_sec = NULL;
2910 }
2911
2912 return entry;
2913 }
2914
2915 /* Create an entry in the branch hash table. */
2916
2917 static struct bfd_hash_entry *
2918 branch_hash_newfunc (struct bfd_hash_entry *entry,
2919 struct bfd_hash_table *table,
2920 const char *string)
2921 {
2922 /* Allocate the structure if it has not already been allocated by a
2923 subclass. */
2924 if (entry == NULL)
2925 {
2926 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2927 if (entry == NULL)
2928 return entry;
2929 }
2930
2931 /* Call the allocation method of the superclass. */
2932 entry = bfd_hash_newfunc (entry, table, string);
2933 if (entry != NULL)
2934 {
2935 struct ppc_branch_hash_entry *eh;
2936
2937 /* Initialize the local fields. */
2938 eh = (struct ppc_branch_hash_entry *) entry;
2939 eh->offset = 0;
2940 eh->iter = 0;
2941 }
2942
2943 return entry;
2944 }
2945
2946 /* Create an entry in a ppc64 ELF linker hash table. */
2947
2948 static struct bfd_hash_entry *
2949 link_hash_newfunc (struct bfd_hash_entry *entry,
2950 struct bfd_hash_table *table,
2951 const char *string)
2952 {
2953 /* Allocate the structure if it has not already been allocated by a
2954 subclass. */
2955 if (entry == NULL)
2956 {
2957 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2958 if (entry == NULL)
2959 return entry;
2960 }
2961
2962 /* Call the allocation method of the superclass. */
2963 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2964 if (entry != NULL)
2965 {
2966 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2967
2968 eh->stub_cache = NULL;
2969 eh->dyn_relocs = NULL;
2970 eh->oh = NULL;
2971 eh->is_func = 0;
2972 eh->is_func_descriptor = 0;
2973 eh->is_entry = 0;
2974 eh->tls_mask = 0;
2975 }
2976
2977 return entry;
2978 }
2979
2980 /* Create a ppc64 ELF linker hash table. */
2981
2982 static struct bfd_link_hash_table *
2983 ppc64_elf_link_hash_table_create (bfd *abfd)
2984 {
2985 struct ppc_link_hash_table *htab;
2986 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2987
2988 htab = bfd_zmalloc (amt);
2989 if (htab == NULL)
2990 return NULL;
2991
2992 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2993 {
2994 free (htab);
2995 return NULL;
2996 }
2997
2998 /* Init the stub hash table too. */
2999 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3000 return NULL;
3001
3002 /* And the branch hash table. */
3003 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3004 return NULL;
3005
3006 /* Initializing two fields of the union is just cosmetic. We really
3007 only care about glist, but when compiled on a 32-bit host the
3008 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3009 debugger inspection of these fields look nicer. */
3010 htab->elf.init_refcount.refcount = 0;
3011 htab->elf.init_refcount.glist = NULL;
3012 htab->elf.init_offset.offset = 0;
3013 htab->elf.init_offset.glist = NULL;
3014
3015 return &htab->elf.root;
3016 }
3017
3018 /* Free the derived linker hash table. */
3019
3020 static void
3021 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3022 {
3023 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3024
3025 bfd_hash_table_free (&ret->stub_hash_table);
3026 bfd_hash_table_free (&ret->branch_hash_table);
3027 _bfd_generic_link_hash_table_free (hash);
3028 }
3029
3030 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3031
3032 void
3033 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3034 {
3035 struct ppc_link_hash_table *htab;
3036
3037 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3038
3039 /* Always hook our dynamic sections into the first bfd, which is the
3040 linker created stub bfd. This ensures that the GOT header is at
3041 the start of the output TOC section. */
3042 htab = ppc_hash_table (info);
3043 htab->stub_bfd = abfd;
3044 htab->elf.dynobj = abfd;
3045 }
3046
3047 /* Build a name for an entry in the stub hash table. */
3048
3049 static char *
3050 ppc_stub_name (const asection *input_section,
3051 const asection *sym_sec,
3052 const struct ppc_link_hash_entry *h,
3053 const Elf_Internal_Rela *rel)
3054 {
3055 char *stub_name;
3056 bfd_size_type len;
3057
3058 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3059 offsets from a sym as a branch target? In fact, we could
3060 probably assume the addend is always zero. */
3061 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3062
3063 if (h)
3064 {
3065 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3066 stub_name = bfd_malloc (len);
3067 if (stub_name != NULL)
3068 {
3069 sprintf (stub_name, "%08x.%s+%x",
3070 input_section->id & 0xffffffff,
3071 h->elf.root.root.string,
3072 (int) rel->r_addend & 0xffffffff);
3073 }
3074 }
3075 else
3076 {
3077 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3078 stub_name = bfd_malloc (len);
3079 if (stub_name != NULL)
3080 {
3081 sprintf (stub_name, "%08x.%x:%x+%x",
3082 input_section->id & 0xffffffff,
3083 sym_sec->id & 0xffffffff,
3084 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3085 (int) rel->r_addend & 0xffffffff);
3086 }
3087 }
3088 return stub_name;
3089 }
3090
3091 /* Look up an entry in the stub hash. Stub entries are cached because
3092 creating the stub name takes a bit of time. */
3093
3094 static struct ppc_stub_hash_entry *
3095 ppc_get_stub_entry (const asection *input_section,
3096 const asection *sym_sec,
3097 struct elf_link_hash_entry *hash,
3098 const Elf_Internal_Rela *rel,
3099 struct ppc_link_hash_table *htab)
3100 {
3101 struct ppc_stub_hash_entry *stub_entry;
3102 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3103 const asection *id_sec;
3104
3105 /* If this input section is part of a group of sections sharing one
3106 stub section, then use the id of the first section in the group.
3107 Stub names need to include a section id, as there may well be
3108 more than one stub used to reach say, printf, and we need to
3109 distinguish between them. */
3110 id_sec = htab->stub_group[input_section->id].link_sec;
3111
3112 if (h != NULL && h->stub_cache != NULL
3113 && h->stub_cache->h == h
3114 && h->stub_cache->id_sec == id_sec)
3115 {
3116 stub_entry = h->stub_cache;
3117 }
3118 else
3119 {
3120 char *stub_name;
3121
3122 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3123 if (stub_name == NULL)
3124 return NULL;
3125
3126 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3127 stub_name, FALSE, FALSE);
3128 if (h != NULL)
3129 h->stub_cache = stub_entry;
3130
3131 free (stub_name);
3132 }
3133
3134 return stub_entry;
3135 }
3136
3137 /* Add a new stub entry to the stub hash. Not all fields of the new
3138 stub entry are initialised. */
3139
3140 static struct ppc_stub_hash_entry *
3141 ppc_add_stub (const char *stub_name,
3142 asection *section,
3143 struct ppc_link_hash_table *htab)
3144 {
3145 asection *link_sec;
3146 asection *stub_sec;
3147 struct ppc_stub_hash_entry *stub_entry;
3148
3149 link_sec = htab->stub_group[section->id].link_sec;
3150 stub_sec = htab->stub_group[section->id].stub_sec;
3151 if (stub_sec == NULL)
3152 {
3153 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3154 if (stub_sec == NULL)
3155 {
3156 size_t namelen;
3157 bfd_size_type len;
3158 char *s_name;
3159
3160 namelen = strlen (link_sec->name);
3161 len = namelen + sizeof (STUB_SUFFIX);
3162 s_name = bfd_alloc (htab->stub_bfd, len);
3163 if (s_name == NULL)
3164 return NULL;
3165
3166 memcpy (s_name, link_sec->name, namelen);
3167 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3168 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3169 if (stub_sec == NULL)
3170 return NULL;
3171 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3172 }
3173 htab->stub_group[section->id].stub_sec = stub_sec;
3174 }
3175
3176 /* Enter this entry into the linker stub hash table. */
3177 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3178 TRUE, FALSE);
3179 if (stub_entry == NULL)
3180 {
3181 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3182 bfd_archive_filename (section->owner),
3183 stub_name);
3184 return NULL;
3185 }
3186
3187 stub_entry->stub_sec = stub_sec;
3188 stub_entry->stub_offset = 0;
3189 stub_entry->id_sec = link_sec;
3190 return stub_entry;
3191 }
3192
3193 /* Create sections for linker generated code. */
3194
3195 static bfd_boolean
3196 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3197 {
3198 struct ppc_link_hash_table *htab;
3199 flagword flags;
3200
3201 htab = ppc_hash_table (info);
3202
3203 /* Create .sfpr for code to save and restore fp regs. */
3204 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3205 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3206 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3207 if (htab->sfpr == NULL
3208 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3209 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3210 return FALSE;
3211
3212 /* Create .glink for lazy dynamic linking support. */
3213 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3214 if (htab->glink == NULL
3215 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3216 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3217 return FALSE;
3218
3219 /* Create .branch_lt for plt_branch stubs. */
3220 flags = (SEC_ALLOC | SEC_LOAD
3221 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3222 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3223 if (htab->brlt == NULL
3224 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3225 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3226 return FALSE;
3227
3228 if (info->shared)
3229 {
3230 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3231 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3232 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3233 if (!htab->relbrlt
3234 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3235 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3236 return FALSE;
3237 }
3238 return TRUE;
3239 }
3240
3241 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3242 not already done. */
3243
3244 static bfd_boolean
3245 create_got_section (bfd *abfd, struct bfd_link_info *info)
3246 {
3247 asection *got, *relgot;
3248 flagword flags;
3249 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3250
3251 if (!htab->got)
3252 {
3253 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3254 return FALSE;
3255
3256 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3257 if (!htab->got)
3258 abort ();
3259 }
3260
3261 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3262 | SEC_LINKER_CREATED);
3263
3264 got = bfd_make_section (abfd, ".got");
3265 if (!got
3266 || !bfd_set_section_flags (abfd, got, flags)
3267 || !bfd_set_section_alignment (abfd, got, 3))
3268 return FALSE;
3269
3270 relgot = bfd_make_section (abfd, ".rela.got");
3271 if (!relgot
3272 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3273 || ! bfd_set_section_alignment (abfd, relgot, 3))
3274 return FALSE;
3275
3276 ppc64_elf_tdata (abfd)->got = got;
3277 ppc64_elf_tdata (abfd)->relgot = relgot;
3278 return TRUE;
3279 }
3280
3281 /* Create the dynamic sections, and set up shortcuts. */
3282
3283 static bfd_boolean
3284 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3285 {
3286 struct ppc_link_hash_table *htab;
3287
3288 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3289 return FALSE;
3290
3291 htab = ppc_hash_table (info);
3292 if (!htab->got)
3293 htab->got = bfd_get_section_by_name (dynobj, ".got");
3294 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3295 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3296 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3297 if (!info->shared)
3298 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3299
3300 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3301 || (!info->shared && !htab->relbss))
3302 abort ();
3303
3304 return TRUE;
3305 }
3306
3307 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3308
3309 static void
3310 ppc64_elf_copy_indirect_symbol
3311 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3312 struct elf_link_hash_entry *dir,
3313 struct elf_link_hash_entry *ind)
3314 {
3315 struct ppc_link_hash_entry *edir, *eind;
3316 flagword mask;
3317
3318 edir = (struct ppc_link_hash_entry *) dir;
3319 eind = (struct ppc_link_hash_entry *) ind;
3320
3321 /* Copy over any dynamic relocs we may have on the indirect sym. */
3322 if (eind->dyn_relocs != NULL)
3323 {
3324 if (edir->dyn_relocs != NULL)
3325 {
3326 struct ppc_dyn_relocs **pp;
3327 struct ppc_dyn_relocs *p;
3328
3329 if (eind->elf.root.type == bfd_link_hash_indirect)
3330 abort ();
3331
3332 /* Add reloc counts against the weak sym to the strong sym
3333 list. Merge any entries against the same section. */
3334 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3335 {
3336 struct ppc_dyn_relocs *q;
3337
3338 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3339 if (q->sec == p->sec)
3340 {
3341 q->pc_count += p->pc_count;
3342 q->count += p->count;
3343 *pp = p->next;
3344 break;
3345 }
3346 if (q == NULL)
3347 pp = &p->next;
3348 }
3349 *pp = edir->dyn_relocs;
3350 }
3351
3352 edir->dyn_relocs = eind->dyn_relocs;
3353 eind->dyn_relocs = NULL;
3354 }
3355
3356 edir->is_func |= eind->is_func;
3357 edir->is_func_descriptor |= eind->is_func_descriptor;
3358 edir->is_entry |= eind->is_entry;
3359 edir->tls_mask |= eind->tls_mask;
3360
3361 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3362 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3363 | ELF_LINK_HASH_NEEDS_PLT);
3364 /* If called to transfer flags for a weakdef during processing
3365 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3366 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3367 if (ELIMINATE_COPY_RELOCS
3368 && eind->elf.root.type != bfd_link_hash_indirect
3369 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3370 mask &= ~ELF_LINK_NON_GOT_REF;
3371
3372 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3373
3374 /* If we were called to copy over info for a weak sym, that's all. */
3375 if (eind->elf.root.type != bfd_link_hash_indirect)
3376 return;
3377
3378 /* Copy over got entries that we may have already seen to the
3379 symbol which just became indirect. */
3380 if (eind->elf.got.glist != NULL)
3381 {
3382 if (edir->elf.got.glist != NULL)
3383 {
3384 struct got_entry **entp;
3385 struct got_entry *ent;
3386
3387 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3388 {
3389 struct got_entry *dent;
3390
3391 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3392 if (dent->addend == ent->addend
3393 && dent->owner == ent->owner
3394 && dent->tls_type == ent->tls_type)
3395 {
3396 dent->got.refcount += ent->got.refcount;
3397 *entp = ent->next;
3398 break;
3399 }
3400 if (dent == NULL)
3401 entp = &ent->next;
3402 }
3403 *entp = edir->elf.got.glist;
3404 }
3405
3406 edir->elf.got.glist = eind->elf.got.glist;
3407 eind->elf.got.glist = NULL;
3408 }
3409
3410 /* And plt entries. */
3411 if (eind->elf.plt.plist != NULL)
3412 {
3413 if (edir->elf.plt.plist != NULL)
3414 {
3415 struct plt_entry **entp;
3416 struct plt_entry *ent;
3417
3418 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3419 {
3420 struct plt_entry *dent;
3421
3422 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3423 if (dent->addend == ent->addend)
3424 {
3425 dent->plt.refcount += ent->plt.refcount;
3426 *entp = ent->next;
3427 break;
3428 }
3429 if (dent == NULL)
3430 entp = &ent->next;
3431 }
3432 *entp = edir->elf.plt.plist;
3433 }
3434
3435 edir->elf.plt.plist = eind->elf.plt.plist;
3436 eind->elf.plt.plist = NULL;
3437 }
3438
3439 if (edir->elf.dynindx == -1)
3440 {
3441 edir->elf.dynindx = eind->elf.dynindx;
3442 edir->elf.dynstr_index = eind->elf.dynstr_index;
3443 eind->elf.dynindx = -1;
3444 eind->elf.dynstr_index = 0;
3445 }
3446 else
3447 BFD_ASSERT (eind->elf.dynindx == -1);
3448 }
3449
3450 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3451 symbols undefined on the command-line. */
3452
3453 bfd_boolean
3454 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3455 {
3456 struct ppc_link_hash_table *htab;
3457 struct bfd_sym_chain *sym;
3458
3459 htab = ppc_hash_table (info);
3460 for (sym = info->gc_sym_list; sym; sym = sym->next)
3461 {
3462 struct elf_link_hash_entry *h;
3463
3464 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3465 if (h != NULL)
3466 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3467 }
3468 return TRUE;
3469 }
3470
3471 static bfd_boolean
3472 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3473 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3474 {
3475 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3476 char *local_got_tls_masks;
3477
3478 if (local_got_ents == NULL)
3479 {
3480 bfd_size_type size = symtab_hdr->sh_info;
3481
3482 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3483 local_got_ents = bfd_zalloc (abfd, size);
3484 if (local_got_ents == NULL)
3485 return FALSE;
3486 elf_local_got_ents (abfd) = local_got_ents;
3487 }
3488
3489 if ((tls_type & TLS_EXPLICIT) == 0)
3490 {
3491 struct got_entry *ent;
3492
3493 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3494 if (ent->addend == r_addend
3495 && ent->owner == abfd
3496 && ent->tls_type == tls_type)
3497 break;
3498 if (ent == NULL)
3499 {
3500 bfd_size_type amt = sizeof (*ent);
3501 ent = bfd_alloc (abfd, amt);
3502 if (ent == NULL)
3503 return FALSE;
3504 ent->next = local_got_ents[r_symndx];
3505 ent->addend = r_addend;
3506 ent->owner = abfd;
3507 ent->tls_type = tls_type;
3508 ent->got.refcount = 0;
3509 local_got_ents[r_symndx] = ent;
3510 }
3511 ent->got.refcount += 1;
3512 }
3513
3514 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3515 local_got_tls_masks[r_symndx] |= tls_type;
3516 return TRUE;
3517 }
3518
3519 static bfd_boolean
3520 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3521 {
3522 struct plt_entry *ent;
3523
3524 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3525 if (ent->addend == addend)
3526 break;
3527 if (ent == NULL)
3528 {
3529 bfd_size_type amt = sizeof (*ent);
3530 ent = bfd_alloc (abfd, amt);
3531 if (ent == NULL)
3532 return FALSE;
3533 ent->next = eh->elf.plt.plist;
3534 ent->addend = addend;
3535 ent->plt.refcount = 0;
3536 eh->elf.plt.plist = ent;
3537 }
3538 ent->plt.refcount += 1;
3539 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3540 eh->is_func = 1;
3541 return TRUE;
3542 }
3543
3544 /* Find the function descriptor hash entry from the given function code
3545 hash entry FH. Link the entries via their OH fields. */
3546 static struct ppc_link_hash_entry *
3547 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3548 {
3549 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3550
3551 if (fdh == NULL)
3552 {
3553 const char *fd_name = fh->elf.root.root.string + 1;
3554
3555 fdh = (struct ppc_link_hash_entry *)
3556 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3557 if (fdh != NULL)
3558 {
3559 fdh->is_func_descriptor = 1;
3560 fdh->oh = &fh->elf;
3561 fh->is_func = 1;
3562 fh->oh = &fdh->elf;
3563 }
3564 }
3565
3566 return fdh;
3567 }
3568
3569 /* Look through the relocs for a section during the first phase, and
3570 calculate needed space in the global offset table, procedure
3571 linkage table, and dynamic reloc sections. */
3572
3573 static bfd_boolean
3574 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3575 asection *sec, const Elf_Internal_Rela *relocs)
3576 {
3577 struct ppc_link_hash_table *htab;
3578 Elf_Internal_Shdr *symtab_hdr;
3579 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3580 const Elf_Internal_Rela *rel;
3581 const Elf_Internal_Rela *rel_end;
3582 asection *sreloc;
3583 asection **opd_sym_map;
3584
3585 if (info->relocatable)
3586 return TRUE;
3587
3588 htab = ppc_hash_table (info);
3589 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3590
3591 sym_hashes = elf_sym_hashes (abfd);
3592 sym_hashes_end = (sym_hashes
3593 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3594 - symtab_hdr->sh_info);
3595
3596 sreloc = NULL;
3597 opd_sym_map = NULL;
3598 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3599 {
3600 /* Garbage collection needs some extra help with .opd sections.
3601 We don't want to necessarily keep everything referenced by
3602 relocs in .opd, as that would keep all functions. Instead,
3603 if we reference an .opd symbol (a function descriptor), we
3604 want to keep the function code symbol's section. This is
3605 easy for global symbols, but for local syms we need to keep
3606 information about the associated function section. Later, if
3607 edit_opd deletes entries, we'll use this array to adjust
3608 local syms in .opd. */
3609 union opd_info {
3610 asection *func_section;
3611 long entry_adjust;
3612 };
3613 bfd_size_type amt;
3614
3615 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3616 opd_sym_map = bfd_zalloc (abfd, amt);
3617 if (opd_sym_map == NULL)
3618 return FALSE;
3619 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3620 }
3621
3622 if (htab->sfpr == NULL
3623 && !create_linkage_sections (htab->elf.dynobj, info))
3624 return FALSE;
3625
3626 rel_end = relocs + sec->reloc_count;
3627 for (rel = relocs; rel < rel_end; rel++)
3628 {
3629 unsigned long r_symndx;
3630 struct elf_link_hash_entry *h;
3631 enum elf_ppc64_reloc_type r_type;
3632 int tls_type = 0;
3633
3634 r_symndx = ELF64_R_SYM (rel->r_info);
3635 if (r_symndx < symtab_hdr->sh_info)
3636 h = NULL;
3637 else
3638 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3639
3640 r_type = ELF64_R_TYPE (rel->r_info);
3641 switch (r_type)
3642 {
3643 case R_PPC64_GOT_TLSLD16:
3644 case R_PPC64_GOT_TLSLD16_LO:
3645 case R_PPC64_GOT_TLSLD16_HI:
3646 case R_PPC64_GOT_TLSLD16_HA:
3647 ppc64_tlsld_got (abfd)->refcount += 1;
3648 tls_type = TLS_TLS | TLS_LD;
3649 goto dogottls;
3650
3651 case R_PPC64_GOT_TLSGD16:
3652 case R_PPC64_GOT_TLSGD16_LO:
3653 case R_PPC64_GOT_TLSGD16_HI:
3654 case R_PPC64_GOT_TLSGD16_HA:
3655 tls_type = TLS_TLS | TLS_GD;
3656 goto dogottls;
3657
3658 case R_PPC64_GOT_TPREL16_DS:
3659 case R_PPC64_GOT_TPREL16_LO_DS:
3660 case R_PPC64_GOT_TPREL16_HI:
3661 case R_PPC64_GOT_TPREL16_HA:
3662 if (info->shared)
3663 info->flags |= DF_STATIC_TLS;
3664 tls_type = TLS_TLS | TLS_TPREL;
3665 goto dogottls;
3666
3667 case R_PPC64_GOT_DTPREL16_DS:
3668 case R_PPC64_GOT_DTPREL16_LO_DS:
3669 case R_PPC64_GOT_DTPREL16_HI:
3670 case R_PPC64_GOT_DTPREL16_HA:
3671 tls_type = TLS_TLS | TLS_DTPREL;
3672 dogottls:
3673 sec->has_tls_reloc = 1;
3674 /* Fall thru */
3675
3676 case R_PPC64_GOT16:
3677 case R_PPC64_GOT16_DS:
3678 case R_PPC64_GOT16_HA:
3679 case R_PPC64_GOT16_HI:
3680 case R_PPC64_GOT16_LO:
3681 case R_PPC64_GOT16_LO_DS:
3682 /* This symbol requires a global offset table entry. */
3683 sec->has_gp_reloc = 1;
3684 if (ppc64_elf_tdata (abfd)->got == NULL
3685 && !create_got_section (abfd, info))
3686 return FALSE;
3687
3688 if (h != NULL)
3689 {
3690 struct ppc_link_hash_entry *eh;
3691 struct got_entry *ent;
3692
3693 eh = (struct ppc_link_hash_entry *) h;
3694 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3695 if (ent->addend == rel->r_addend
3696 && ent->owner == abfd
3697 && ent->tls_type == tls_type)
3698 break;
3699 if (ent == NULL)
3700 {
3701 bfd_size_type amt = sizeof (*ent);
3702 ent = bfd_alloc (abfd, amt);
3703 if (ent == NULL)
3704 return FALSE;
3705 ent->next = eh->elf.got.glist;
3706 ent->addend = rel->r_addend;
3707 ent->owner = abfd;
3708 ent->tls_type = tls_type;
3709 ent->got.refcount = 0;
3710 eh->elf.got.glist = ent;
3711 }
3712 ent->got.refcount += 1;
3713 eh->tls_mask |= tls_type;
3714 }
3715 else
3716 /* This is a global offset table entry for a local symbol. */
3717 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3718 rel->r_addend, tls_type))
3719 return FALSE;
3720 break;
3721
3722 case R_PPC64_PLT16_HA:
3723 case R_PPC64_PLT16_HI:
3724 case R_PPC64_PLT16_LO:
3725 case R_PPC64_PLT32:
3726 case R_PPC64_PLT64:
3727 /* This symbol requires a procedure linkage table entry. We
3728 actually build the entry in adjust_dynamic_symbol,
3729 because this might be a case of linking PIC code without
3730 linking in any dynamic objects, in which case we don't
3731 need to generate a procedure linkage table after all. */
3732 if (h == NULL)
3733 {
3734 /* It does not make sense to have a procedure linkage
3735 table entry for a local symbol. */
3736 bfd_set_error (bfd_error_bad_value);
3737 return FALSE;
3738 }
3739 else
3740 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3741 rel->r_addend))
3742 return FALSE;
3743 break;
3744
3745 /* The following relocations don't need to propagate the
3746 relocation if linking a shared object since they are
3747 section relative. */
3748 case R_PPC64_SECTOFF:
3749 case R_PPC64_SECTOFF_LO:
3750 case R_PPC64_SECTOFF_HI:
3751 case R_PPC64_SECTOFF_HA:
3752 case R_PPC64_SECTOFF_DS:
3753 case R_PPC64_SECTOFF_LO_DS:
3754 case R_PPC64_DTPREL16:
3755 case R_PPC64_DTPREL16_LO:
3756 case R_PPC64_DTPREL16_HI:
3757 case R_PPC64_DTPREL16_HA:
3758 case R_PPC64_DTPREL16_DS:
3759 case R_PPC64_DTPREL16_LO_DS:
3760 case R_PPC64_DTPREL16_HIGHER:
3761 case R_PPC64_DTPREL16_HIGHERA:
3762 case R_PPC64_DTPREL16_HIGHEST:
3763 case R_PPC64_DTPREL16_HIGHESTA:
3764 break;
3765
3766 /* Nor do these. */
3767 case R_PPC64_TOC16:
3768 case R_PPC64_TOC16_LO:
3769 case R_PPC64_TOC16_HI:
3770 case R_PPC64_TOC16_HA:
3771 case R_PPC64_TOC16_DS:
3772 case R_PPC64_TOC16_LO_DS:
3773 sec->has_gp_reloc = 1;
3774 break;
3775
3776 /* This relocation describes the C++ object vtable hierarchy.
3777 Reconstruct it for later use during GC. */
3778 case R_PPC64_GNU_VTINHERIT:
3779 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3780 return FALSE;
3781 break;
3782
3783 /* This relocation describes which C++ vtable entries are actually
3784 used. Record for later use during GC. */
3785 case R_PPC64_GNU_VTENTRY:
3786 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3787 return FALSE;
3788 break;
3789
3790 case R_PPC64_REL14:
3791 case R_PPC64_REL14_BRTAKEN:
3792 case R_PPC64_REL14_BRNTAKEN:
3793 htab->has_14bit_branch = 1;
3794 /* Fall through. */
3795
3796 case R_PPC64_REL24:
3797 if (h != NULL
3798 && h->root.root.string[0] == '.'
3799 && h->root.root.string[1] != 0)
3800 {
3801 /* We may need a .plt entry if the function this reloc
3802 refers to is in a shared lib. */
3803 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3804 rel->r_addend))
3805 return FALSE;
3806 if (h == htab->tls_get_addr)
3807 sec->has_tls_reloc = 1;
3808 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3809 == 0)
3810 && (h->root.root.string[15] == 0
3811 || h->root.root.string[15] == '@'))
3812 {
3813 htab->tls_get_addr = h;
3814 sec->has_tls_reloc = 1;
3815 }
3816 }
3817 break;
3818
3819 case R_PPC64_TPREL64:
3820 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3821 if (info->shared)
3822 info->flags |= DF_STATIC_TLS;
3823 goto dotlstoc;
3824
3825 case R_PPC64_DTPMOD64:
3826 if (rel + 1 < rel_end
3827 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3828 && rel[1].r_offset == rel->r_offset + 8)
3829 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3830 else
3831 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3832 goto dotlstoc;
3833
3834 case R_PPC64_DTPREL64:
3835 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3836 if (rel != relocs
3837 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3838 && rel[-1].r_offset == rel->r_offset - 8)
3839 /* This is the second reloc of a dtpmod, dtprel pair.
3840 Don't mark with TLS_DTPREL. */
3841 goto dodyn;
3842
3843 dotlstoc:
3844 sec->has_tls_reloc = 1;
3845 if (h != NULL)
3846 {
3847 struct ppc_link_hash_entry *eh;
3848 eh = (struct ppc_link_hash_entry *) h;
3849 eh->tls_mask |= tls_type;
3850 }
3851 else
3852 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3853 rel->r_addend, tls_type))
3854 return FALSE;
3855
3856 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3857 {
3858 /* One extra to simplify get_tls_mask. */
3859 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3860 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3861 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3862 return FALSE;
3863 }
3864 BFD_ASSERT (rel->r_offset % 8 == 0);
3865 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3866
3867 /* Mark the second slot of a GD or LD entry.
3868 -1 to indicate GD and -2 to indicate LD. */
3869 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3870 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3871 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3872 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3873 goto dodyn;
3874
3875 case R_PPC64_TPREL16:
3876 case R_PPC64_TPREL16_LO:
3877 case R_PPC64_TPREL16_HI:
3878 case R_PPC64_TPREL16_HA:
3879 case R_PPC64_TPREL16_DS:
3880 case R_PPC64_TPREL16_LO_DS:
3881 case R_PPC64_TPREL16_HIGHER:
3882 case R_PPC64_TPREL16_HIGHERA:
3883 case R_PPC64_TPREL16_HIGHEST:
3884 case R_PPC64_TPREL16_HIGHESTA:
3885 if (info->shared)
3886 {
3887 info->flags |= DF_STATIC_TLS;
3888 goto dodyn;
3889 }
3890 break;
3891
3892 case R_PPC64_ADDR64:
3893 if (opd_sym_map != NULL
3894 && h != NULL
3895 && h->root.root.string[0] == '.'
3896 && h->root.root.string[1] != 0)
3897 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3898
3899 if (opd_sym_map != NULL
3900 && h == NULL
3901 && rel + 1 < rel_end
3902 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3903 {
3904 asection *s;
3905
3906 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3907 r_symndx);
3908 if (s == NULL)
3909 return FALSE;
3910 else if (s != sec)
3911 opd_sym_map[rel->r_offset / 24] = s;
3912 }
3913 /* Fall through. */
3914
3915 case R_PPC64_REL30:
3916 case R_PPC64_REL32:
3917 case R_PPC64_REL64:
3918 case R_PPC64_ADDR14:
3919 case R_PPC64_ADDR14_BRNTAKEN:
3920 case R_PPC64_ADDR14_BRTAKEN:
3921 case R_PPC64_ADDR16:
3922 case R_PPC64_ADDR16_DS:
3923 case R_PPC64_ADDR16_HA:
3924 case R_PPC64_ADDR16_HI:
3925 case R_PPC64_ADDR16_HIGHER:
3926 case R_PPC64_ADDR16_HIGHERA:
3927 case R_PPC64_ADDR16_HIGHEST:
3928 case R_PPC64_ADDR16_HIGHESTA:
3929 case R_PPC64_ADDR16_LO:
3930 case R_PPC64_ADDR16_LO_DS:
3931 case R_PPC64_ADDR24:
3932 case R_PPC64_ADDR32:
3933 case R_PPC64_UADDR16:
3934 case R_PPC64_UADDR32:
3935 case R_PPC64_UADDR64:
3936 case R_PPC64_TOC:
3937 if (h != NULL && !info->shared)
3938 /* We may need a copy reloc. */
3939 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3940
3941 /* Don't propagate .opd relocs. */
3942 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3943 break;
3944
3945 /* Don't propagate relocs that the dynamic linker won't relocate. */
3946 if ((sec->flags & SEC_ALLOC) == 0)
3947 break;
3948
3949 /* If we are creating a shared library, and this is a reloc
3950 against a global symbol, or a non PC relative reloc
3951 against a local symbol, then we need to copy the reloc
3952 into the shared library. However, if we are linking with
3953 -Bsymbolic, we do not need to copy a reloc against a
3954 global symbol which is defined in an object we are
3955 including in the link (i.e., DEF_REGULAR is set). At
3956 this point we have not seen all the input files, so it is
3957 possible that DEF_REGULAR is not set now but will be set
3958 later (it is never cleared). In case of a weak definition,
3959 DEF_REGULAR may be cleared later by a strong definition in
3960 a shared library. We account for that possibility below by
3961 storing information in the dyn_relocs field of the hash
3962 table entry. A similar situation occurs when creating
3963 shared libraries and symbol visibility changes render the
3964 symbol local.
3965
3966 If on the other hand, we are creating an executable, we
3967 may need to keep relocations for symbols satisfied by a
3968 dynamic library if we manage to avoid copy relocs for the
3969 symbol. */
3970 dodyn:
3971 if ((info->shared
3972 && (MUST_BE_DYN_RELOC (r_type)
3973 || (h != NULL
3974 && (! info->symbolic
3975 || h->root.type == bfd_link_hash_defweak
3976 || (h->elf_link_hash_flags
3977 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3978 || (ELIMINATE_COPY_RELOCS
3979 && !info->shared
3980 && h != NULL
3981 && (h->root.type == bfd_link_hash_defweak
3982 || (h->elf_link_hash_flags
3983 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3984 {
3985 struct ppc_dyn_relocs *p;
3986 struct ppc_dyn_relocs **head;
3987
3988 /* We must copy these reloc types into the output file.
3989 Create a reloc section in dynobj and make room for
3990 this reloc. */
3991 if (sreloc == NULL)
3992 {
3993 const char *name;
3994 bfd *dynobj;
3995
3996 name = (bfd_elf_string_from_elf_section
3997 (abfd,
3998 elf_elfheader (abfd)->e_shstrndx,
3999 elf_section_data (sec)->rel_hdr.sh_name));
4000 if (name == NULL)
4001 return FALSE;
4002
4003 if (strncmp (name, ".rela", 5) != 0
4004 || strcmp (bfd_get_section_name (abfd, sec),
4005 name + 5) != 0)
4006 {
4007 (*_bfd_error_handler)
4008 (_("%s: bad relocation section name `%s\'"),
4009 bfd_archive_filename (abfd), name);
4010 bfd_set_error (bfd_error_bad_value);
4011 }
4012
4013 dynobj = htab->elf.dynobj;
4014 sreloc = bfd_get_section_by_name (dynobj, name);
4015 if (sreloc == NULL)
4016 {
4017 flagword flags;
4018
4019 sreloc = bfd_make_section (dynobj, name);
4020 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4021 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4022 if ((sec->flags & SEC_ALLOC) != 0)
4023 flags |= SEC_ALLOC | SEC_LOAD;
4024 if (sreloc == NULL
4025 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4026 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4027 return FALSE;
4028 }
4029 elf_section_data (sec)->sreloc = sreloc;
4030 }
4031
4032 /* If this is a global symbol, we count the number of
4033 relocations we need for this symbol. */
4034 if (h != NULL)
4035 {
4036 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4037 }
4038 else
4039 {
4040 /* Track dynamic relocs needed for local syms too.
4041 We really need local syms available to do this
4042 easily. Oh well. */
4043
4044 asection *s;
4045 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4046 sec, r_symndx);
4047 if (s == NULL)
4048 return FALSE;
4049
4050 head = ((struct ppc_dyn_relocs **)
4051 &elf_section_data (s)->local_dynrel);
4052 }
4053
4054 p = *head;
4055 if (p == NULL || p->sec != sec)
4056 {
4057 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4058 if (p == NULL)
4059 return FALSE;
4060 p->next = *head;
4061 *head = p;
4062 p->sec = sec;
4063 p->count = 0;
4064 p->pc_count = 0;
4065 }
4066
4067 p->count += 1;
4068 if (!MUST_BE_DYN_RELOC (r_type))
4069 p->pc_count += 1;
4070 }
4071 break;
4072
4073 default:
4074 break;
4075 }
4076 }
4077
4078 return TRUE;
4079 }
4080
4081 /* Return the section that should be marked against GC for a given
4082 relocation. */
4083
4084 static asection *
4085 ppc64_elf_gc_mark_hook (asection *sec,
4086 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4087 Elf_Internal_Rela *rel,
4088 struct elf_link_hash_entry *h,
4089 Elf_Internal_Sym *sym)
4090 {
4091 asection *rsec = NULL;
4092
4093 if (h != NULL)
4094 {
4095 enum elf_ppc64_reloc_type r_type;
4096 struct ppc_link_hash_entry *fdh;
4097
4098 r_type = ELF64_R_TYPE (rel->r_info);
4099 switch (r_type)
4100 {
4101 case R_PPC64_GNU_VTINHERIT:
4102 case R_PPC64_GNU_VTENTRY:
4103 break;
4104
4105 default:
4106 switch (h->root.type)
4107 {
4108 case bfd_link_hash_defined:
4109 case bfd_link_hash_defweak:
4110 fdh = (struct ppc_link_hash_entry *) h;
4111
4112 /* Function descriptor syms cause the associated
4113 function code sym section to be marked. */
4114 if (fdh->is_func_descriptor)
4115 rsec = fdh->oh->root.u.def.section;
4116
4117 /* Function entry syms return NULL if they are in .opd
4118 and are not ._start (or others undefined on the ld
4119 command line). Thus we avoid marking all function
4120 sections, as all functions are referenced in .opd. */
4121 else if ((fdh->oh != NULL
4122 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4123 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4124 rsec = h->root.u.def.section;
4125 break;
4126
4127 case bfd_link_hash_common:
4128 rsec = h->root.u.c.p->section;
4129 break;
4130
4131 default:
4132 break;
4133 }
4134 }
4135 }
4136 else
4137 {
4138 asection **opd_sym_section;
4139
4140 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4141 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4142 if (opd_sym_section != NULL)
4143 rsec = opd_sym_section[sym->st_value / 24];
4144 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4145 rsec = NULL;
4146 }
4147
4148 return rsec;
4149 }
4150
4151 /* Update the .got, .plt. and dynamic reloc reference counts for the
4152 section being removed. */
4153
4154 static bfd_boolean
4155 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4156 asection *sec, const Elf_Internal_Rela *relocs)
4157 {
4158 struct ppc_link_hash_table *htab;
4159 Elf_Internal_Shdr *symtab_hdr;
4160 struct elf_link_hash_entry **sym_hashes;
4161 struct got_entry **local_got_ents;
4162 const Elf_Internal_Rela *rel, *relend;
4163
4164 elf_section_data (sec)->local_dynrel = NULL;
4165
4166 htab = ppc_hash_table (info);
4167 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4168 sym_hashes = elf_sym_hashes (abfd);
4169 local_got_ents = elf_local_got_ents (abfd);
4170
4171 relend = relocs + sec->reloc_count;
4172 for (rel = relocs; rel < relend; rel++)
4173 {
4174 unsigned long r_symndx;
4175 enum elf_ppc64_reloc_type r_type;
4176 struct elf_link_hash_entry *h = NULL;
4177 char tls_type = 0;
4178
4179 r_symndx = ELF64_R_SYM (rel->r_info);
4180 r_type = ELF64_R_TYPE (rel->r_info);
4181 if (r_symndx >= symtab_hdr->sh_info)
4182 {
4183 struct ppc_link_hash_entry *eh;
4184 struct ppc_dyn_relocs **pp;
4185 struct ppc_dyn_relocs *p;
4186
4187 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4188 eh = (struct ppc_link_hash_entry *) h;
4189
4190 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4191 if (p->sec == sec)
4192 {
4193 /* Everything must go for SEC. */
4194 *pp = p->next;
4195 break;
4196 }
4197 }
4198
4199 switch (r_type)
4200 {
4201 case R_PPC64_GOT_TLSLD16:
4202 case R_PPC64_GOT_TLSLD16_LO:
4203 case R_PPC64_GOT_TLSLD16_HI:
4204 case R_PPC64_GOT_TLSLD16_HA:
4205 ppc64_tlsld_got (abfd)->refcount -= 1;
4206 tls_type = TLS_TLS | TLS_LD;
4207 goto dogot;
4208
4209 case R_PPC64_GOT_TLSGD16:
4210 case R_PPC64_GOT_TLSGD16_LO:
4211 case R_PPC64_GOT_TLSGD16_HI:
4212 case R_PPC64_GOT_TLSGD16_HA:
4213 tls_type = TLS_TLS | TLS_GD;
4214 goto dogot;
4215
4216 case R_PPC64_GOT_TPREL16_DS:
4217 case R_PPC64_GOT_TPREL16_LO_DS:
4218 case R_PPC64_GOT_TPREL16_HI:
4219 case R_PPC64_GOT_TPREL16_HA:
4220 tls_type = TLS_TLS | TLS_TPREL;
4221 goto dogot;
4222
4223 case R_PPC64_GOT_DTPREL16_DS:
4224 case R_PPC64_GOT_DTPREL16_LO_DS:
4225 case R_PPC64_GOT_DTPREL16_HI:
4226 case R_PPC64_GOT_DTPREL16_HA:
4227 tls_type = TLS_TLS | TLS_DTPREL;
4228 goto dogot;
4229
4230 case R_PPC64_GOT16:
4231 case R_PPC64_GOT16_DS:
4232 case R_PPC64_GOT16_HA:
4233 case R_PPC64_GOT16_HI:
4234 case R_PPC64_GOT16_LO:
4235 case R_PPC64_GOT16_LO_DS:
4236 dogot:
4237 {
4238 struct got_entry *ent;
4239
4240 if (h != NULL)
4241 ent = h->got.glist;
4242 else
4243 ent = local_got_ents[r_symndx];
4244
4245 for (; ent != NULL; ent = ent->next)
4246 if (ent->addend == rel->r_addend
4247 && ent->owner == abfd
4248 && ent->tls_type == tls_type)
4249 break;
4250 if (ent == NULL)
4251 abort ();
4252 if (ent->got.refcount > 0)
4253 ent->got.refcount -= 1;
4254 }
4255 break;
4256
4257 case R_PPC64_PLT16_HA:
4258 case R_PPC64_PLT16_HI:
4259 case R_PPC64_PLT16_LO:
4260 case R_PPC64_PLT32:
4261 case R_PPC64_PLT64:
4262 case R_PPC64_REL14:
4263 case R_PPC64_REL14_BRNTAKEN:
4264 case R_PPC64_REL14_BRTAKEN:
4265 case R_PPC64_REL24:
4266 if (h != NULL)
4267 {
4268 struct plt_entry *ent;
4269
4270 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4271 if (ent->addend == rel->r_addend)
4272 break;
4273 if (ent == NULL)
4274 abort ();
4275 if (ent->plt.refcount > 0)
4276 ent->plt.refcount -= 1;
4277 }
4278 break;
4279
4280 default:
4281 break;
4282 }
4283 }
4284 return TRUE;
4285 }
4286
4287 /* Called via elf_link_hash_traverse to transfer dynamic linking
4288 information on function code symbol entries to their corresponding
4289 function descriptor symbol entries. */
4290 static bfd_boolean
4291 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4292 {
4293 struct bfd_link_info *info;
4294 struct ppc_link_hash_table *htab;
4295 struct plt_entry *ent;
4296 struct ppc_link_hash_entry *fh;
4297 struct ppc_link_hash_entry *fdh;
4298 bfd_boolean force_local;
4299
4300 fh = (struct ppc_link_hash_entry *) h;
4301 if (fh->elf.root.type == bfd_link_hash_indirect)
4302 return TRUE;
4303
4304 if (fh->elf.root.type == bfd_link_hash_warning)
4305 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4306
4307 info = inf;
4308 htab = ppc_hash_table (info);
4309
4310 /* If this is a function code symbol, transfer dynamic linking
4311 information to the function descriptor symbol. */
4312 if (!fh->is_func)
4313 return TRUE;
4314
4315 if (fh->elf.root.type == bfd_link_hash_undefweak
4316 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4317 htab->have_undefweak = TRUE;
4318
4319 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4320 if (ent->plt.refcount > 0)
4321 break;
4322 if (ent == NULL
4323 || fh->elf.root.root.string[0] != '.'
4324 || fh->elf.root.root.string[1] == '\0')
4325 return TRUE;
4326
4327 /* Find the corresponding function descriptor symbol. Create it
4328 as undefined if necessary. */
4329
4330 fdh = get_fdh (fh, htab);
4331 if (fdh != NULL)
4332 while (fdh->elf.root.type == bfd_link_hash_indirect
4333 || fdh->elf.root.type == bfd_link_hash_warning)
4334 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4335
4336 if (fdh == NULL
4337 && info->shared
4338 && (fh->elf.root.type == bfd_link_hash_undefined
4339 || fh->elf.root.type == bfd_link_hash_undefweak))
4340 {
4341 bfd *abfd;
4342 asymbol *newsym;
4343 struct bfd_link_hash_entry *bh;
4344
4345 abfd = fh->elf.root.u.undef.abfd;
4346 newsym = bfd_make_empty_symbol (abfd);
4347 newsym->name = fh->elf.root.root.string + 1;
4348 newsym->section = bfd_und_section_ptr;
4349 newsym->value = 0;
4350 newsym->flags = BSF_OBJECT;
4351 if (fh->elf.root.type == bfd_link_hash_undefweak)
4352 newsym->flags |= BSF_WEAK;
4353
4354 bh = &fdh->elf.root;
4355 if ( !(_bfd_generic_link_add_one_symbol
4356 (info, abfd, newsym->name, newsym->flags,
4357 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4358 {
4359 return FALSE;
4360 }
4361 fdh = (struct ppc_link_hash_entry *) bh;
4362 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4363 fdh->elf.size = 24;
4364 fdh->elf.type = STT_OBJECT;
4365 }
4366
4367 if (fdh != NULL
4368 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4369 && (info->shared
4370 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4371 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4372 || (fdh->elf.root.type == bfd_link_hash_undefweak
4373 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4374 {
4375 if (fdh->elf.dynindx == -1)
4376 if (! bfd_elf64_link_record_dynamic_symbol (info, &fdh->elf))
4377 return FALSE;
4378 fdh->elf.elf_link_hash_flags
4379 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4380 | ELF_LINK_HASH_REF_DYNAMIC
4381 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4382 | ELF_LINK_NON_GOT_REF));
4383 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4384 {
4385 fdh->elf.plt.plist = fh->elf.plt.plist;
4386 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4387 }
4388 fdh->is_func_descriptor = 1;
4389 fdh->oh = &fh->elf;
4390 fh->oh = &fdh->elf;
4391 }
4392
4393 /* Now that the info is on the function descriptor, clear the
4394 function code sym info. Any function code syms for which we
4395 don't have a definition in a regular file, we force local.
4396 This prevents a shared library from exporting syms that have
4397 been imported from another library. Function code syms that
4398 are really in the library we must leave global to prevent the
4399 linker dragging in a definition from a static library. */
4400 force_local
4401 = (info->shared
4402 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4403 || fdh == NULL
4404 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4405 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4406 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4407
4408 return TRUE;
4409 }
4410
4411 #define MIN_SAVE_FPR 14
4412 #define MAX_SAVE_FPR 31
4413
4414 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4415 this hook to a) provide some gcc support functions, and b) transfer
4416 dynamic linking information gathered so far on function code symbol
4417 entries, to their corresponding function descriptor symbol entries. */
4418 static bfd_boolean
4419 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4420 struct bfd_link_info *info)
4421 {
4422 struct ppc_link_hash_table *htab;
4423 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4424 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4425 unsigned int i;
4426 struct elf_link_hash_entry *h;
4427 bfd_byte *p;
4428 char sym[10];
4429
4430 htab = ppc_hash_table (info);
4431
4432 if (htab->sfpr == NULL)
4433 /* We don't have any relocs. */
4434 return TRUE;
4435
4436 /* First provide any missing ._savef* and ._restf* functions. */
4437 memcpy (sym, "._savef14", 10);
4438 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4439 {
4440 sym[7] = i / 10 + '0';
4441 sym[8] = i % 10 + '0';
4442 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4443 if (h != NULL
4444 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4445 {
4446 if (lowest_savef > i)
4447 lowest_savef = i;
4448 h->root.type = bfd_link_hash_defined;
4449 h->root.u.def.section = htab->sfpr;
4450 h->root.u.def.value = (i - lowest_savef) * 4;
4451 h->type = STT_FUNC;
4452 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4453 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4454 }
4455 }
4456
4457 memcpy (sym, "._restf14", 10);
4458 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4459 {
4460 sym[7] = i / 10 + '0';
4461 sym[8] = i % 10 + '0';
4462 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4463 if (h != NULL
4464 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4465 {
4466 if (lowest_restf > i)
4467 lowest_restf = i;
4468 h->root.type = bfd_link_hash_defined;
4469 h->root.u.def.section = htab->sfpr;
4470 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4471 + (i - lowest_restf) * 4);
4472 h->type = STT_FUNC;
4473 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4474 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4475 }
4476 }
4477
4478 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4479
4480 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4481 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4482
4483 if (htab->sfpr->_raw_size == 0)
4484 {
4485 if (!htab->have_undefweak)
4486 {
4487 _bfd_strip_section_from_output (info, htab->sfpr);
4488 return TRUE;
4489 }
4490
4491 htab->sfpr->_raw_size = 4;
4492 }
4493
4494 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4495 if (p == NULL)
4496 return FALSE;
4497 htab->sfpr->contents = p;
4498
4499 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4500 {
4501 unsigned int fpr = i << 21;
4502 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4503 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4504 p += 4;
4505 }
4506 if (lowest_savef <= MAX_SAVE_FPR)
4507 {
4508 bfd_put_32 (htab->elf.dynobj, BLR, p);
4509 p += 4;
4510 }
4511
4512 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4513 {
4514 unsigned int fpr = i << 21;
4515 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4516 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4517 p += 4;
4518 }
4519 if (lowest_restf <= MAX_SAVE_FPR
4520 || htab->sfpr->_raw_size == 4)
4521 {
4522 bfd_put_32 (htab->elf.dynobj, BLR, p);
4523 }
4524
4525 return TRUE;
4526 }
4527
4528 /* Adjust a symbol defined by a dynamic object and referenced by a
4529 regular object. The current definition is in some section of the
4530 dynamic object, but we're not including those sections. We have to
4531 change the definition to something the rest of the link can
4532 understand. */
4533
4534 static bfd_boolean
4535 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4536 struct elf_link_hash_entry *h)
4537 {
4538 struct ppc_link_hash_table *htab;
4539 asection *s;
4540 unsigned int power_of_two;
4541
4542 htab = ppc_hash_table (info);
4543
4544 /* Deal with function syms. */
4545 if (h->type == STT_FUNC
4546 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4547 {
4548 /* Clear procedure linkage table information for any symbol that
4549 won't need a .plt entry. */
4550 struct plt_entry *ent;
4551 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4552 if (ent->plt.refcount > 0)
4553 break;
4554 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4555 || ent == NULL
4556 || SYMBOL_CALLS_LOCAL (info, h)
4557 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4558 && h->root.type == bfd_link_hash_undefweak))
4559 {
4560 h->plt.plist = NULL;
4561 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4562 }
4563 }
4564 else
4565 h->plt.plist = NULL;
4566
4567 /* If this is a weak symbol, and there is a real definition, the
4568 processor independent code will have arranged for us to see the
4569 real definition first, and we can just use the same value. */
4570 if (h->weakdef != NULL)
4571 {
4572 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4573 || h->weakdef->root.type == bfd_link_hash_defweak);
4574 h->root.u.def.section = h->weakdef->root.u.def.section;
4575 h->root.u.def.value = h->weakdef->root.u.def.value;
4576 if (ELIMINATE_COPY_RELOCS)
4577 h->elf_link_hash_flags
4578 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4579 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4580 return TRUE;
4581 }
4582
4583 /* If we are creating a shared library, we must presume that the
4584 only references to the symbol are via the global offset table.
4585 For such cases we need not do anything here; the relocations will
4586 be handled correctly by relocate_section. */
4587 if (info->shared)
4588 return TRUE;
4589
4590 /* If there are no references to this symbol that do not use the
4591 GOT, we don't need to generate a copy reloc. */
4592 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4593 return TRUE;
4594
4595 if (ELIMINATE_COPY_RELOCS)
4596 {
4597 struct ppc_link_hash_entry * eh;
4598 struct ppc_dyn_relocs *p;
4599
4600 eh = (struct ppc_link_hash_entry *) h;
4601 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4602 {
4603 s = p->sec->output_section;
4604 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4605 break;
4606 }
4607
4608 /* If we didn't find any dynamic relocs in read-only sections, then
4609 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4610 if (p == NULL)
4611 {
4612 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4613 return TRUE;
4614 }
4615 }
4616
4617 if (h->plt.plist != NULL)
4618 {
4619 /* We should never get here, but unfortunately there are versions
4620 of gcc out there that improperly (for this ABI) put initialized
4621 function pointers, vtable refs and suchlike in read-only
4622 sections. Allow them to proceed, but warn that this might
4623 break at runtime. */
4624 (*_bfd_error_handler)
4625 (_("copy reloc against `%s' requires lazy plt linking; "
4626 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4627 h->root.root.string);
4628 }
4629
4630 /* This is a reference to a symbol defined by a dynamic object which
4631 is not a function. */
4632
4633 /* We must allocate the symbol in our .dynbss section, which will
4634 become part of the .bss section of the executable. There will be
4635 an entry for this symbol in the .dynsym section. The dynamic
4636 object will contain position independent code, so all references
4637 from the dynamic object to this symbol will go through the global
4638 offset table. The dynamic linker will use the .dynsym entry to
4639 determine the address it must put in the global offset table, so
4640 both the dynamic object and the regular object will refer to the
4641 same memory location for the variable. */
4642
4643 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4644 to copy the initial value out of the dynamic object and into the
4645 runtime process image. We need to remember the offset into the
4646 .rela.bss section we are going to use. */
4647 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4648 {
4649 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4650 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4651 }
4652
4653 /* We need to figure out the alignment required for this symbol. I
4654 have no idea how ELF linkers handle this. */
4655 power_of_two = bfd_log2 (h->size);
4656 if (power_of_two > 4)
4657 power_of_two = 4;
4658
4659 /* Apply the required alignment. */
4660 s = htab->dynbss;
4661 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4662 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4663 {
4664 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4665 return FALSE;
4666 }
4667
4668 /* Define the symbol as being at this point in the section. */
4669 h->root.u.def.section = s;
4670 h->root.u.def.value = s->_raw_size;
4671
4672 /* Increment the section size to make room for the symbol. */
4673 s->_raw_size += h->size;
4674
4675 return TRUE;
4676 }
4677
4678 /* If given a function descriptor symbol, hide both the function code
4679 sym and the descriptor. */
4680 static void
4681 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4682 struct elf_link_hash_entry *h,
4683 bfd_boolean force_local)
4684 {
4685 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4686
4687 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4688 {
4689 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4690
4691 if (fh == NULL)
4692 {
4693 const char *p, *q;
4694 struct ppc_link_hash_table *htab;
4695 char save;
4696
4697 /* We aren't supposed to use alloca in BFD because on
4698 systems which do not have alloca the version in libiberty
4699 calls xmalloc, which might cause the program to crash
4700 when it runs out of memory. This function doesn't have a
4701 return status, so there's no way to gracefully return an
4702 error. So cheat. We know that string[-1] can be safely
4703 dereferenced; It's either a string in an ELF string
4704 table, or allocated in an objalloc structure. */
4705
4706 p = h->root.root.string - 1;
4707 save = *p;
4708 *(char *) p = '.';
4709 htab = ppc_hash_table (info);
4710 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4711 *(char *) p = save;
4712
4713 /* Unfortunately, if it so happens that the string we were
4714 looking for was allocated immediately before this string,
4715 then we overwrote the string terminator. That's the only
4716 reason the lookup should fail. */
4717 if (fh == NULL)
4718 {
4719 q = h->root.root.string + strlen (h->root.root.string);
4720 while (q >= h->root.root.string && *q == *p)
4721 --q, --p;
4722 if (q < h->root.root.string && *p == '.')
4723 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4724 }
4725 if (fh != NULL)
4726 {
4727 ((struct ppc_link_hash_entry *) h)->oh = fh;
4728 ((struct ppc_link_hash_entry *) fh)->oh = h;
4729 }
4730 }
4731 if (fh != NULL)
4732 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4733 }
4734 }
4735
4736 static bfd_boolean
4737 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4738 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4739 unsigned long r_symndx, bfd *ibfd)
4740 {
4741 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4742
4743 if (r_symndx >= symtab_hdr->sh_info)
4744 {
4745 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4746 struct elf_link_hash_entry *h;
4747
4748 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4749 while (h->root.type == bfd_link_hash_indirect
4750 || h->root.type == bfd_link_hash_warning)
4751 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4752
4753 if (hp != NULL)
4754 *hp = h;
4755
4756 if (symp != NULL)
4757 *symp = NULL;
4758
4759 if (symsecp != NULL)
4760 {
4761 asection *symsec = NULL;
4762 if (h->root.type == bfd_link_hash_defined
4763 || h->root.type == bfd_link_hash_defweak)
4764 symsec = h->root.u.def.section;
4765 *symsecp = symsec;
4766 }
4767
4768 if (tls_maskp != NULL)
4769 {
4770 struct ppc_link_hash_entry *eh;
4771
4772 eh = (struct ppc_link_hash_entry *) h;
4773 *tls_maskp = &eh->tls_mask;
4774 }
4775 }
4776 else
4777 {
4778 Elf_Internal_Sym *sym;
4779 Elf_Internal_Sym *locsyms = *locsymsp;
4780
4781 if (locsyms == NULL)
4782 {
4783 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4784 if (locsyms == NULL)
4785 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4786 symtab_hdr->sh_info,
4787 0, NULL, NULL, NULL);
4788 if (locsyms == NULL)
4789 return FALSE;
4790 *locsymsp = locsyms;
4791 }
4792 sym = locsyms + r_symndx;
4793
4794 if (hp != NULL)
4795 *hp = NULL;
4796
4797 if (symp != NULL)
4798 *symp = sym;
4799
4800 if (symsecp != NULL)
4801 {
4802 asection *symsec = NULL;
4803 if ((sym->st_shndx != SHN_UNDEF
4804 && sym->st_shndx < SHN_LORESERVE)
4805 || sym->st_shndx > SHN_HIRESERVE)
4806 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4807 *symsecp = symsec;
4808 }
4809
4810 if (tls_maskp != NULL)
4811 {
4812 struct got_entry **lgot_ents;
4813 char *tls_mask;
4814
4815 tls_mask = NULL;
4816 lgot_ents = elf_local_got_ents (ibfd);
4817 if (lgot_ents != NULL)
4818 {
4819 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4820 tls_mask = &lgot_masks[r_symndx];
4821 }
4822 *tls_maskp = tls_mask;
4823 }
4824 }
4825 return TRUE;
4826 }
4827
4828 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4829 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4830 type suitable for optimization, and 1 otherwise. */
4831
4832 static int
4833 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
4834 Elf_Internal_Sym **locsymsp,
4835 const Elf_Internal_Rela *rel, bfd *ibfd)
4836 {
4837 unsigned long r_symndx;
4838 int next_r;
4839 struct elf_link_hash_entry *h;
4840 Elf_Internal_Sym *sym;
4841 asection *sec;
4842 bfd_vma off;
4843
4844 r_symndx = ELF64_R_SYM (rel->r_info);
4845 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4846 return 0;
4847
4848 if ((*tls_maskp != NULL && **tls_maskp != 0)
4849 || sec == NULL
4850 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4851 return 1;
4852
4853 /* Look inside a TOC section too. */
4854 if (h != NULL)
4855 {
4856 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4857 off = h->root.u.def.value;
4858 }
4859 else
4860 off = sym->st_value;
4861 off += rel->r_addend;
4862 BFD_ASSERT (off % 8 == 0);
4863 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4864 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4865 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4866 return 0;
4867 if (toc_symndx != NULL)
4868 *toc_symndx = r_symndx;
4869 if ((h == NULL
4870 || ((h->root.type == bfd_link_hash_defined
4871 || h->root.type == bfd_link_hash_defweak)
4872 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4873 && (next_r == -1 || next_r == -2))
4874 return 1 - next_r;
4875 return 1;
4876 }
4877
4878 bfd_boolean
4879 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4880 {
4881 bfd *ibfd;
4882
4883 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4884 {
4885 asection *sec;
4886 Elf_Internal_Rela *relstart, *rel, *relend;
4887 Elf_Internal_Shdr *symtab_hdr;
4888 Elf_Internal_Sym *local_syms;
4889 struct elf_link_hash_entry **sym_hashes;
4890 bfd_vma offset;
4891 bfd_size_type amt;
4892 long *adjust;
4893 bfd_boolean need_edit;
4894
4895 sec = bfd_get_section_by_name (ibfd, ".opd");
4896 if (sec == NULL)
4897 continue;
4898
4899 amt = sec->_raw_size * sizeof (long) / 24;
4900 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4901 if (adjust == NULL)
4902 {
4903 /* Must be a ld -r link. ie. check_relocs hasn't been
4904 called. */
4905 adjust = bfd_zalloc (obfd, amt);
4906 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4907 }
4908 memset (adjust, 0, amt);
4909
4910 if (sec->output_section == bfd_abs_section_ptr)
4911 continue;
4912
4913 /* Look through the section relocs. */
4914 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4915 continue;
4916
4917 local_syms = NULL;
4918 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4919 sym_hashes = elf_sym_hashes (ibfd);
4920
4921 /* Read the relocations. */
4922 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4923 info->keep_memory);
4924 if (relstart == NULL)
4925 return FALSE;
4926
4927 /* First run through the relocs to check they are sane, and to
4928 determine whether we need to edit this opd section. */
4929 need_edit = FALSE;
4930 offset = 0;
4931 relend = relstart + sec->reloc_count;
4932 for (rel = relstart; rel < relend; )
4933 {
4934 enum elf_ppc64_reloc_type r_type;
4935 unsigned long r_symndx;
4936 asection *sym_sec;
4937 struct elf_link_hash_entry *h;
4938 Elf_Internal_Sym *sym;
4939
4940 /* .opd contains a regular array of 24 byte entries. We're
4941 only interested in the reloc pointing to a function entry
4942 point. */
4943 if (rel->r_offset != offset
4944 || rel + 1 >= relend
4945 || (rel + 1)->r_offset != offset + 8)
4946 {
4947 /* If someone messes with .opd alignment then after a
4948 "ld -r" we might have padding in the middle of .opd.
4949 Also, there's nothing to prevent someone putting
4950 something silly in .opd with the assembler. No .opd
4951 optimization for them! */
4952 (*_bfd_error_handler)
4953 (_("%s: .opd is not a regular array of opd entries"),
4954 bfd_archive_filename (ibfd));
4955 need_edit = FALSE;
4956 break;
4957 }
4958
4959 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
4960 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
4961 {
4962 (*_bfd_error_handler)
4963 (_("%s: unexpected reloc type %u in .opd section"),
4964 bfd_archive_filename (ibfd), r_type);
4965 need_edit = FALSE;
4966 break;
4967 }
4968
4969 r_symndx = ELF64_R_SYM (rel->r_info);
4970 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
4971 r_symndx, ibfd))
4972 goto error_ret;
4973
4974 if (sym_sec == NULL || sym_sec->owner == NULL)
4975 {
4976 const char *sym_name;
4977 if (h != NULL)
4978 sym_name = h->root.root.string;
4979 else
4980 sym_name = bfd_elf_local_sym_name (ibfd, sym);
4981
4982 (*_bfd_error_handler)
4983 (_("%s: undefined sym `%s' in .opd section"),
4984 bfd_archive_filename (ibfd),
4985 sym_name);
4986 need_edit = FALSE;
4987 break;
4988 }
4989
4990 /* opd entries are always for functions defined in the
4991 current input bfd. If the symbol isn't defined in the
4992 input bfd, then we won't be using the function in this
4993 bfd; It must be defined in a linkonce section in another
4994 bfd, or is weak. It's also possible that we are
4995 discarding the function due to a linker script /DISCARD/,
4996 which we test for via the output_section. */
4997 if (sym_sec->owner != ibfd
4998 || sym_sec->output_section == bfd_abs_section_ptr)
4999 need_edit = TRUE;
5000
5001 offset += 24;
5002 rel += 2;
5003 /* Allow for the possibility of a reloc on the third word. */
5004 if (rel < relend
5005 && rel->r_offset == offset - 8)
5006 rel += 1;
5007 }
5008
5009 if (need_edit)
5010 {
5011 Elf_Internal_Rela *write_rel;
5012 bfd_byte *rptr, *wptr;
5013 bfd_boolean skip;
5014
5015 /* This seems a waste of time as input .opd sections are all
5016 zeros as generated by gcc, but I suppose there's no reason
5017 this will always be so. We might start putting something in
5018 the third word of .opd entries. */
5019 if ((sec->flags & SEC_IN_MEMORY) == 0)
5020 {
5021 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
5022 if (loc == NULL
5023 || !bfd_get_section_contents (ibfd, sec, loc, 0,
5024 sec->_raw_size))
5025 {
5026 error_ret:
5027 if (local_syms != NULL
5028 && symtab_hdr->contents != (unsigned char *) local_syms)
5029 free (local_syms);
5030 if (elf_section_data (sec)->relocs != relstart)
5031 free (relstart);
5032 return FALSE;
5033 }
5034 sec->contents = loc;
5035 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5036 }
5037
5038 elf_section_data (sec)->relocs = relstart;
5039
5040 wptr = sec->contents;
5041 rptr = sec->contents;
5042 write_rel = relstart;
5043 skip = FALSE;
5044 offset = 0;
5045 for (rel = relstart; rel < relend; rel++)
5046 {
5047 unsigned long r_symndx;
5048 asection *sym_sec;
5049 struct elf_link_hash_entry *h;
5050 Elf_Internal_Sym *sym;
5051
5052 r_symndx = ELF64_R_SYM (rel->r_info);
5053 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5054 r_symndx, ibfd))
5055 goto error_ret;
5056
5057 if (rel->r_offset == offset)
5058 {
5059 struct ppc_link_hash_entry *fdh = NULL;
5060 if (h != NULL)
5061 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5062 ppc_hash_table (info));
5063
5064 skip = (sym_sec->owner != ibfd
5065 || sym_sec->output_section == bfd_abs_section_ptr);
5066 if (skip)
5067 {
5068 if (h != NULL && sym_sec->owner == ibfd)
5069 {
5070 /* Arrange for the function descriptor sym
5071 to be dropped. */
5072 fdh->elf.root.u.def.value = 0;
5073 fdh->elf.root.u.def.section = sym_sec;
5074 }
5075 }
5076 else
5077 {
5078 /* We'll be keeping this opd entry. */
5079
5080 if (h != NULL)
5081 {
5082 /* Redefine the function descriptor symbol
5083 to this location in the opd section.
5084 We've checked above that opd relocs are
5085 ordered. */
5086 fdh->elf.root.u.def.value = wptr - sec->contents;
5087 }
5088 else
5089 {
5090 /* Local syms are a bit tricky. We could
5091 tweak them as they can be cached, but
5092 we'd need to look through the local syms
5093 for the function descriptor sym which we
5094 don't have at the moment. So keep an
5095 array of adjustments. */
5096 adjust[rel->r_offset / 24] = wptr - rptr;
5097 }
5098
5099 if (wptr != rptr)
5100 memcpy (wptr, rptr, 24);
5101 wptr += 24;
5102 }
5103 rptr += 24;
5104 offset += 24;
5105 }
5106
5107 if (skip)
5108 {
5109 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5110 if (info->shared)
5111 {
5112 /* We won't be needing dynamic relocs here. */
5113 struct ppc_dyn_relocs **pp;
5114 struct ppc_dyn_relocs *p;
5115
5116 if (h != NULL)
5117 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5118 else if (sym_sec != NULL)
5119 pp = ((struct ppc_dyn_relocs **)
5120 &elf_section_data (sym_sec)->local_dynrel);
5121 else
5122 pp = ((struct ppc_dyn_relocs **)
5123 &elf_section_data (sec)->local_dynrel);
5124 while ((p = *pp) != NULL)
5125 {
5126 if (p->sec == sec)
5127 {
5128 p->count -= 1;
5129 if (p->count == 0)
5130 *pp = p->next;
5131 break;
5132 }
5133 pp = &p->next;
5134 }
5135 }
5136 }
5137 else
5138 {
5139 /* We need to adjust any reloc offsets to point to the
5140 new opd entries. While we're at it, we may as well
5141 remove redundant relocs. */
5142 rel->r_offset += wptr - rptr;
5143 if (write_rel != rel)
5144 memcpy (write_rel, rel, sizeof (*rel));
5145 ++write_rel;
5146 }
5147 }
5148
5149 sec->_cooked_size = wptr - sec->contents;
5150 sec->reloc_count = write_rel - relstart;
5151 /* Fudge the size too, as this is used later in
5152 elf_bfd_final_link if we are emitting relocs. */
5153 elf_section_data (sec)->rel_hdr.sh_size
5154 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5155 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5156 }
5157 else if (elf_section_data (sec)->relocs != relstart)
5158 free (relstart);
5159
5160 if (local_syms != NULL
5161 && symtab_hdr->contents != (unsigned char *) local_syms)
5162 {
5163 if (!info->keep_memory)
5164 free (local_syms);
5165 else
5166 symtab_hdr->contents = (unsigned char *) local_syms;
5167 }
5168 }
5169
5170 return TRUE;
5171 }
5172
5173 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
5174
5175 asection *
5176 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5177 {
5178 struct ppc_link_hash_table *htab;
5179
5180 htab = ppc_hash_table (info);
5181 if (htab->tls_get_addr != NULL)
5182 {
5183 struct elf_link_hash_entry *h = htab->tls_get_addr;
5184
5185 while (h->root.type == bfd_link_hash_indirect
5186 || h->root.type == bfd_link_hash_warning)
5187 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5188
5189 htab->tls_get_addr = h;
5190 }
5191
5192 return _bfd_elf_tls_setup (obfd, info);
5193 }
5194
5195 /* Run through all the TLS relocs looking for optimization
5196 opportunities. The linker has been hacked (see ppc64elf.em) to do
5197 a preliminary section layout so that we know the TLS segment
5198 offsets. We can't optimize earlier because some optimizations need
5199 to know the tp offset, and we need to optimize before allocating
5200 dynamic relocations. */
5201
5202 bfd_boolean
5203 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5204 {
5205 bfd *ibfd;
5206 asection *sec;
5207 struct ppc_link_hash_table *htab;
5208
5209 if (info->relocatable || info->shared)
5210 return TRUE;
5211
5212 htab = ppc_hash_table (info);
5213 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5214 {
5215 Elf_Internal_Sym *locsyms = NULL;
5216
5217 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5218 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5219 {
5220 Elf_Internal_Rela *relstart, *rel, *relend;
5221 int expecting_tls_get_addr;
5222
5223 /* Read the relocations. */
5224 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5225 info->keep_memory);
5226 if (relstart == NULL)
5227 return FALSE;
5228
5229 expecting_tls_get_addr = 0;
5230 relend = relstart + sec->reloc_count;
5231 for (rel = relstart; rel < relend; rel++)
5232 {
5233 enum elf_ppc64_reloc_type r_type;
5234 unsigned long r_symndx;
5235 struct elf_link_hash_entry *h;
5236 Elf_Internal_Sym *sym;
5237 asection *sym_sec;
5238 char *tls_mask;
5239 char tls_set, tls_clear, tls_type = 0;
5240 bfd_vma value;
5241 bfd_boolean ok_tprel, is_local;
5242
5243 r_symndx = ELF64_R_SYM (rel->r_info);
5244 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5245 r_symndx, ibfd))
5246 {
5247 err_free_rel:
5248 if (elf_section_data (sec)->relocs != relstart)
5249 free (relstart);
5250 if (locsyms != NULL
5251 && (elf_tdata (ibfd)->symtab_hdr.contents
5252 != (unsigned char *) locsyms))
5253 free (locsyms);
5254 return FALSE;
5255 }
5256
5257 if (h != NULL)
5258 {
5259 if (h->root.type != bfd_link_hash_defined
5260 && h->root.type != bfd_link_hash_defweak)
5261 continue;
5262 value = h->root.u.def.value;
5263 }
5264 else
5265 value = sym->st_value;
5266
5267 ok_tprel = FALSE;
5268 is_local = FALSE;
5269 if (h == NULL
5270 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5271 {
5272 is_local = TRUE;
5273 value += sym_sec->output_offset;
5274 value += sym_sec->output_section->vma;
5275 value -= htab->elf.tls_sec->vma;
5276 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5277 < (bfd_vma) 1 << 32);
5278 }
5279
5280 r_type = ELF64_R_TYPE (rel->r_info);
5281 switch (r_type)
5282 {
5283 case R_PPC64_GOT_TLSLD16:
5284 case R_PPC64_GOT_TLSLD16_LO:
5285 case R_PPC64_GOT_TLSLD16_HI:
5286 case R_PPC64_GOT_TLSLD16_HA:
5287 /* These relocs should never be against a symbol
5288 defined in a shared lib. Leave them alone if
5289 that turns out to be the case. */
5290 ppc64_tlsld_got (ibfd)->refcount -= 1;
5291 if (!is_local)
5292 continue;
5293
5294 /* LD -> LE */
5295 tls_set = 0;
5296 tls_clear = TLS_LD;
5297 tls_type = TLS_TLS | TLS_LD;
5298 expecting_tls_get_addr = 1;
5299 break;
5300
5301 case R_PPC64_GOT_TLSGD16:
5302 case R_PPC64_GOT_TLSGD16_LO:
5303 case R_PPC64_GOT_TLSGD16_HI:
5304 case R_PPC64_GOT_TLSGD16_HA:
5305 if (ok_tprel)
5306 /* GD -> LE */
5307 tls_set = 0;
5308 else
5309 /* GD -> IE */
5310 tls_set = TLS_TLS | TLS_TPRELGD;
5311 tls_clear = TLS_GD;
5312 tls_type = TLS_TLS | TLS_GD;
5313 expecting_tls_get_addr = 1;
5314 break;
5315
5316 case R_PPC64_GOT_TPREL16_DS:
5317 case R_PPC64_GOT_TPREL16_LO_DS:
5318 case R_PPC64_GOT_TPREL16_HI:
5319 case R_PPC64_GOT_TPREL16_HA:
5320 expecting_tls_get_addr = 0;
5321 if (ok_tprel)
5322 {
5323 /* IE -> LE */
5324 tls_set = 0;
5325 tls_clear = TLS_TPREL;
5326 tls_type = TLS_TLS | TLS_TPREL;
5327 break;
5328 }
5329 else
5330 continue;
5331
5332 case R_PPC64_REL14:
5333 case R_PPC64_REL14_BRTAKEN:
5334 case R_PPC64_REL14_BRNTAKEN:
5335 case R_PPC64_REL24:
5336 if (h != NULL
5337 && h == htab->tls_get_addr)
5338 {
5339 if (!expecting_tls_get_addr
5340 && rel != relstart
5341 && ((ELF64_R_TYPE (rel[-1].r_info)
5342 == R_PPC64_TOC16)
5343 || (ELF64_R_TYPE (rel[-1].r_info)
5344 == R_PPC64_TOC16_LO)))
5345 {
5346 /* Check for toc tls entries. */
5347 char *toc_tls;
5348 int retval;
5349
5350 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
5351 rel - 1, ibfd);
5352 if (retval == 0)
5353 goto err_free_rel;
5354 if (toc_tls != NULL)
5355 expecting_tls_get_addr = retval > 1;
5356 }
5357
5358 if (expecting_tls_get_addr)
5359 {
5360 struct plt_entry *ent;
5361 for (ent = h->plt.plist; ent; ent = ent->next)
5362 if (ent->addend == 0)
5363 {
5364 if (ent->plt.refcount > 0)
5365 ent->plt.refcount -= 1;
5366 break;
5367 }
5368 }
5369 }
5370 expecting_tls_get_addr = 0;
5371 continue;
5372
5373 case R_PPC64_TPREL64:
5374 expecting_tls_get_addr = 0;
5375 if (ok_tprel)
5376 {
5377 /* IE -> LE */
5378 tls_set = TLS_EXPLICIT;
5379 tls_clear = TLS_TPREL;
5380 break;
5381 }
5382 else
5383 continue;
5384
5385 case R_PPC64_DTPMOD64:
5386 expecting_tls_get_addr = 0;
5387 if (rel + 1 < relend
5388 && (rel[1].r_info
5389 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5390 && rel[1].r_offset == rel->r_offset + 8)
5391 {
5392 if (ok_tprel)
5393 /* GD -> LE */
5394 tls_set = TLS_EXPLICIT | TLS_GD;
5395 else
5396 /* GD -> IE */
5397 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5398 tls_clear = TLS_GD;
5399 }
5400 else
5401 {
5402 if (!is_local)
5403 continue;
5404
5405 /* LD -> LE */
5406 tls_set = TLS_EXPLICIT;
5407 tls_clear = TLS_LD;
5408 }
5409 break;
5410
5411 default:
5412 expecting_tls_get_addr = 0;
5413 continue;
5414 }
5415
5416 if ((tls_set & TLS_EXPLICIT) == 0)
5417 {
5418 struct got_entry *ent;
5419
5420 /* Adjust got entry for this reloc. */
5421 if (h != NULL)
5422 ent = h->got.glist;
5423 else
5424 ent = elf_local_got_ents (ibfd)[r_symndx];
5425
5426 for (; ent != NULL; ent = ent->next)
5427 if (ent->addend == rel->r_addend
5428 && ent->owner == ibfd
5429 && ent->tls_type == tls_type)
5430 break;
5431 if (ent == NULL)
5432 abort ();
5433
5434 if (tls_set == 0)
5435 {
5436 /* We managed to get rid of a got entry. */
5437 if (ent->got.refcount > 0)
5438 ent->got.refcount -= 1;
5439 }
5440 }
5441 else if (h != NULL)
5442 {
5443 struct ppc_link_hash_entry * eh;
5444 struct ppc_dyn_relocs **pp;
5445 struct ppc_dyn_relocs *p;
5446
5447 /* Adjust dynamic relocs. */
5448 eh = (struct ppc_link_hash_entry *) h;
5449 for (pp = &eh->dyn_relocs;
5450 (p = *pp) != NULL;
5451 pp = &p->next)
5452 if (p->sec == sec)
5453 {
5454 /* If we got rid of a DTPMOD/DTPREL reloc
5455 pair then we'll lose one or two dyn
5456 relocs. */
5457 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5458 p->count -= 1;
5459 p->count -= 1;
5460 if (p->count == 0)
5461 *pp = p->next;
5462 break;
5463 }
5464 }
5465
5466 *tls_mask |= tls_set;
5467 *tls_mask &= ~tls_clear;
5468 }
5469
5470 if (elf_section_data (sec)->relocs != relstart)
5471 free (relstart);
5472 }
5473
5474 if (locsyms != NULL
5475 && (elf_tdata (ibfd)->symtab_hdr.contents
5476 != (unsigned char *) locsyms))
5477 {
5478 if (!info->keep_memory)
5479 free (locsyms);
5480 else
5481 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5482 }
5483 }
5484 return TRUE;
5485 }
5486
5487 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5488 will be called from elflink.h. If elflink.h doesn't call our
5489 finish_dynamic_symbol routine, we'll need to do something about
5490 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5491 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5492 ((DYN) \
5493 && ((SHARED) \
5494 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5495 && ((H)->dynindx != -1 \
5496 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5497
5498 /* Allocate space in .plt, .got and associated reloc sections for
5499 dynamic relocs. */
5500
5501 static bfd_boolean
5502 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5503 {
5504 struct bfd_link_info *info;
5505 struct ppc_link_hash_table *htab;
5506 asection *s;
5507 struct ppc_link_hash_entry *eh;
5508 struct ppc_dyn_relocs *p;
5509 struct got_entry *gent;
5510
5511 if (h->root.type == bfd_link_hash_indirect)
5512 return TRUE;
5513
5514 if (h->root.type == bfd_link_hash_warning)
5515 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5516
5517 info = (struct bfd_link_info *) inf;
5518 htab = ppc_hash_table (info);
5519
5520 if (htab->elf.dynamic_sections_created
5521 && h->dynindx != -1
5522 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5523 {
5524 struct plt_entry *pent;
5525 bfd_boolean doneone = FALSE;
5526 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5527 if (pent->plt.refcount > 0)
5528 {
5529 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5530
5531 /* If this is the first .plt entry, make room for the special
5532 first entry. */
5533 s = htab->plt;
5534 if (s->_raw_size == 0)
5535 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5536
5537 pent->plt.offset = s->_raw_size;
5538
5539 /* Make room for this entry. */
5540 s->_raw_size += PLT_ENTRY_SIZE;
5541
5542 /* Make room for the .glink code. */
5543 s = htab->glink;
5544 if (s->_raw_size == 0)
5545 s->_raw_size += GLINK_CALL_STUB_SIZE;
5546 /* We need bigger stubs past index 32767. */
5547 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5548 s->_raw_size += 4;
5549 s->_raw_size += 2*4;
5550
5551 /* We also need to make an entry in the .rela.plt section. */
5552 s = htab->relplt;
5553 s->_raw_size += sizeof (Elf64_External_Rela);
5554 doneone = TRUE;
5555 }
5556 else
5557 pent->plt.offset = (bfd_vma) -1;
5558 if (!doneone)
5559 {
5560 h->plt.plist = NULL;
5561 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5562 }
5563 }
5564 else
5565 {
5566 h->plt.plist = NULL;
5567 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5568 }
5569
5570 eh = (struct ppc_link_hash_entry *) h;
5571 /* Run through the TLS GD got entries first if we're changing them
5572 to TPREL. */
5573 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5574 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5575 if (gent->got.refcount > 0
5576 && (gent->tls_type & TLS_GD) != 0)
5577 {
5578 /* This was a GD entry that has been converted to TPREL. If
5579 there happens to be a TPREL entry we can use that one. */
5580 struct got_entry *ent;
5581 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5582 if (ent->got.refcount > 0
5583 && (ent->tls_type & TLS_TPREL) != 0
5584 && ent->addend == gent->addend
5585 && ent->owner == gent->owner)
5586 {
5587 gent->got.refcount = 0;
5588 break;
5589 }
5590
5591 /* If not, then we'll be using our own TPREL entry. */
5592 if (gent->got.refcount != 0)
5593 gent->tls_type = TLS_TLS | TLS_TPREL;
5594 }
5595
5596 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5597 if (gent->got.refcount > 0)
5598 {
5599 bfd_boolean dyn;
5600
5601 /* Make sure this symbol is output as a dynamic symbol.
5602 Undefined weak syms won't yet be marked as dynamic,
5603 nor will all TLS symbols. */
5604 if (h->dynindx == -1
5605 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5606 {
5607 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5608 return FALSE;
5609 }
5610
5611 if ((gent->tls_type & TLS_LD) != 0
5612 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5613 {
5614 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5615 continue;
5616 }
5617
5618 s = ppc64_elf_tdata (gent->owner)->got;
5619 gent->got.offset = s->_raw_size;
5620 s->_raw_size
5621 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5622 dyn = htab->elf.dynamic_sections_created;
5623 if ((info->shared
5624 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5625 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5626 || h->root.type != bfd_link_hash_undefweak))
5627 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5628 += (gent->tls_type & eh->tls_mask & TLS_GD
5629 ? 2 * sizeof (Elf64_External_Rela)
5630 : sizeof (Elf64_External_Rela));
5631 }
5632 else
5633 gent->got.offset = (bfd_vma) -1;
5634
5635 if (eh->dyn_relocs == NULL)
5636 return TRUE;
5637
5638 /* In the shared -Bsymbolic case, discard space allocated for
5639 dynamic pc-relative relocs against symbols which turn out to be
5640 defined in regular objects. For the normal shared case, discard
5641 space for relocs that have become local due to symbol visibility
5642 changes. */
5643
5644 if (info->shared)
5645 {
5646 /* Relocs that use pc_count are those that appear on a call insn,
5647 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5648 generated via assembly. We want calls to protected symbols to
5649 resolve directly to the function rather than going via the plt.
5650 If people want function pointer comparisons to work as expected
5651 then they should avoid writing weird assembly. */
5652 if (SYMBOL_CALLS_LOCAL (info, h))
5653 {
5654 struct ppc_dyn_relocs **pp;
5655
5656 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5657 {
5658 p->count -= p->pc_count;
5659 p->pc_count = 0;
5660 if (p->count == 0)
5661 *pp = p->next;
5662 else
5663 pp = &p->next;
5664 }
5665 }
5666
5667 /* Also discard relocs on undefined weak syms with non-default
5668 visibility. */
5669 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5670 && h->root.type == bfd_link_hash_undefweak)
5671 eh->dyn_relocs = NULL;
5672 }
5673 else if (ELIMINATE_COPY_RELOCS)
5674 {
5675 /* For the non-shared case, discard space for relocs against
5676 symbols which turn out to need copy relocs or are not
5677 dynamic. */
5678
5679 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5680 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5681 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5682 {
5683 /* Make sure this symbol is output as a dynamic symbol.
5684 Undefined weak syms won't yet be marked as dynamic. */
5685 if (h->dynindx == -1
5686 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5687 {
5688 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5689 return FALSE;
5690 }
5691
5692 /* If that succeeded, we know we'll be keeping all the
5693 relocs. */
5694 if (h->dynindx != -1)
5695 goto keep;
5696 }
5697
5698 eh->dyn_relocs = NULL;
5699
5700 keep: ;
5701 }
5702
5703 /* Finally, allocate space. */
5704 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5705 {
5706 asection *sreloc = elf_section_data (p->sec)->sreloc;
5707 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5708 }
5709
5710 return TRUE;
5711 }
5712
5713 /* Find any dynamic relocs that apply to read-only sections. */
5714
5715 static bfd_boolean
5716 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5717 {
5718 struct ppc_link_hash_entry *eh;
5719 struct ppc_dyn_relocs *p;
5720
5721 if (h->root.type == bfd_link_hash_warning)
5722 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5723
5724 eh = (struct ppc_link_hash_entry *) h;
5725 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5726 {
5727 asection *s = p->sec->output_section;
5728
5729 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5730 {
5731 struct bfd_link_info *info = inf;
5732
5733 info->flags |= DF_TEXTREL;
5734
5735 /* Not an error, just cut short the traversal. */
5736 return FALSE;
5737 }
5738 }
5739 return TRUE;
5740 }
5741
5742 /* Set the sizes of the dynamic sections. */
5743
5744 static bfd_boolean
5745 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5746 struct bfd_link_info *info)
5747 {
5748 struct ppc_link_hash_table *htab;
5749 bfd *dynobj;
5750 asection *s;
5751 bfd_boolean relocs;
5752 bfd *ibfd;
5753
5754 htab = ppc_hash_table (info);
5755 dynobj = htab->elf.dynobj;
5756 if (dynobj == NULL)
5757 abort ();
5758
5759 if (htab->elf.dynamic_sections_created)
5760 {
5761 /* Set the contents of the .interp section to the interpreter. */
5762 if (info->executable)
5763 {
5764 s = bfd_get_section_by_name (dynobj, ".interp");
5765 if (s == NULL)
5766 abort ();
5767 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5768 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5769 }
5770 }
5771
5772 /* Set up .got offsets for local syms, and space for local dynamic
5773 relocs. */
5774 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5775 {
5776 struct got_entry **lgot_ents;
5777 struct got_entry **end_lgot_ents;
5778 char *lgot_masks;
5779 bfd_size_type locsymcount;
5780 Elf_Internal_Shdr *symtab_hdr;
5781 asection *srel;
5782
5783 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5784 continue;
5785
5786 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5787 {
5788 s = ppc64_elf_tdata (ibfd)->got;
5789 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5790 s->_raw_size += 16;
5791 if (info->shared)
5792 {
5793 srel = ppc64_elf_tdata (ibfd)->relgot;
5794 srel->_raw_size += sizeof (Elf64_External_Rela);
5795 }
5796 }
5797 else
5798 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5799
5800 for (s = ibfd->sections; s != NULL; s = s->next)
5801 {
5802 struct ppc_dyn_relocs *p;
5803
5804 for (p = *((struct ppc_dyn_relocs **)
5805 &elf_section_data (s)->local_dynrel);
5806 p != NULL;
5807 p = p->next)
5808 {
5809 if (!bfd_is_abs_section (p->sec)
5810 && bfd_is_abs_section (p->sec->output_section))
5811 {
5812 /* Input section has been discarded, either because
5813 it is a copy of a linkonce section or due to
5814 linker script /DISCARD/, so we'll be discarding
5815 the relocs too. */
5816 }
5817 else if (p->count != 0)
5818 {
5819 srel = elf_section_data (p->sec)->sreloc;
5820 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5821 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5822 info->flags |= DF_TEXTREL;
5823 }
5824 }
5825 }
5826
5827 lgot_ents = elf_local_got_ents (ibfd);
5828 if (!lgot_ents)
5829 continue;
5830
5831 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5832 locsymcount = symtab_hdr->sh_info;
5833 end_lgot_ents = lgot_ents + locsymcount;
5834 lgot_masks = (char *) end_lgot_ents;
5835 s = ppc64_elf_tdata (ibfd)->got;
5836 srel = ppc64_elf_tdata (ibfd)->relgot;
5837 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5838 {
5839 struct got_entry *ent;
5840
5841 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5842 if (ent->got.refcount > 0)
5843 {
5844 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5845 {
5846 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5847 {
5848 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5849 s->_raw_size += 16;
5850 if (info->shared)
5851 srel->_raw_size += sizeof (Elf64_External_Rela);
5852 }
5853 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5854 }
5855 else
5856 {
5857 ent->got.offset = s->_raw_size;
5858 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5859 {
5860 s->_raw_size += 16;
5861 if (info->shared)
5862 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5863 }
5864 else
5865 {
5866 s->_raw_size += 8;
5867 if (info->shared)
5868 srel->_raw_size += sizeof (Elf64_External_Rela);
5869 }
5870 }
5871 }
5872 else
5873 ent->got.offset = (bfd_vma) -1;
5874 }
5875 }
5876
5877 /* Allocate global sym .plt and .got entries, and space for global
5878 sym dynamic relocs. */
5879 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5880
5881 /* We now have determined the sizes of the various dynamic sections.
5882 Allocate memory for them. */
5883 relocs = FALSE;
5884 for (s = dynobj->sections; s != NULL; s = s->next)
5885 {
5886 if ((s->flags & SEC_LINKER_CREATED) == 0)
5887 continue;
5888
5889 /* Reset _cooked_size since prelim layout will set it wrongly,
5890 and a non-zero _cooked_size sticks. */
5891 s->_cooked_size = 0;
5892
5893 if (s == htab->brlt || s == htab->relbrlt)
5894 /* These haven't been allocated yet; don't strip. */
5895 continue;
5896 else if (s == htab->got
5897 || s == htab->plt
5898 || s == htab->glink)
5899 {
5900 /* Strip this section if we don't need it; see the
5901 comment below. */
5902 }
5903 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5904 {
5905 if (s->_raw_size == 0)
5906 {
5907 /* If we don't need this section, strip it from the
5908 output file. This is mostly to handle .rela.bss and
5909 .rela.plt. We must create both sections in
5910 create_dynamic_sections, because they must be created
5911 before the linker maps input sections to output
5912 sections. The linker does that before
5913 adjust_dynamic_symbol is called, and it is that
5914 function which decides whether anything needs to go
5915 into these sections. */
5916 }
5917 else
5918 {
5919 if (s != htab->relplt)
5920 relocs = TRUE;
5921
5922 /* We use the reloc_count field as a counter if we need
5923 to copy relocs into the output file. */
5924 s->reloc_count = 0;
5925 }
5926 }
5927 else
5928 {
5929 /* It's not one of our sections, so don't allocate space. */
5930 continue;
5931 }
5932
5933 if (s->_raw_size == 0)
5934 {
5935 _bfd_strip_section_from_output (info, s);
5936 continue;
5937 }
5938
5939 /* .plt is in the bss section. We don't initialise it. */
5940 if ((s->flags & SEC_LOAD) == 0)
5941 continue;
5942
5943 /* Allocate memory for the section contents. We use bfd_zalloc
5944 here in case unused entries are not reclaimed before the
5945 section's contents are written out. This should not happen,
5946 but this way if it does we get a R_PPC64_NONE reloc in .rela
5947 sections instead of garbage.
5948 We also rely on the section contents being zero when writing
5949 the GOT. */
5950 s->contents = bfd_zalloc (dynobj, s->_raw_size);
5951 if (s->contents == NULL)
5952 return FALSE;
5953 }
5954
5955 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5956 {
5957 s = ppc64_elf_tdata (ibfd)->got;
5958 if (s != NULL && s != htab->got)
5959 {
5960 s->_cooked_size = 0;
5961 if (s->_raw_size == 0)
5962 _bfd_strip_section_from_output (info, s);
5963 else
5964 {
5965 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5966 if (s->contents == NULL)
5967 return FALSE;
5968 }
5969 }
5970 s = ppc64_elf_tdata (ibfd)->relgot;
5971 if (s != NULL)
5972 {
5973 s->_cooked_size = 0;
5974 if (s->_raw_size == 0)
5975 _bfd_strip_section_from_output (info, s);
5976 else
5977 {
5978 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5979 if (s->contents == NULL)
5980 return FALSE;
5981 relocs = TRUE;
5982 s->reloc_count = 0;
5983 }
5984 }
5985 }
5986
5987 if (htab->elf.dynamic_sections_created)
5988 {
5989 /* Add some entries to the .dynamic section. We fill in the
5990 values later, in ppc64_elf_finish_dynamic_sections, but we
5991 must add the entries now so that we get the correct size for
5992 the .dynamic section. The DT_DEBUG entry is filled in by the
5993 dynamic linker and used by the debugger. */
5994 #define add_dynamic_entry(TAG, VAL) \
5995 bfd_elf64_add_dynamic_entry (info, (TAG), (VAL))
5996
5997 if (info->executable)
5998 {
5999 if (!add_dynamic_entry (DT_DEBUG, 0))
6000 return FALSE;
6001 }
6002
6003 if (htab->plt != NULL && htab->plt->_raw_size != 0)
6004 {
6005 if (!add_dynamic_entry (DT_PLTGOT, 0)
6006 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6007 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6008 || !add_dynamic_entry (DT_JMPREL, 0)
6009 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6010 return FALSE;
6011 }
6012
6013 if (NO_OPD_RELOCS)
6014 {
6015 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6016 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6017 return FALSE;
6018 }
6019
6020 if (relocs)
6021 {
6022 if (!add_dynamic_entry (DT_RELA, 0)
6023 || !add_dynamic_entry (DT_RELASZ, 0)
6024 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6025 return FALSE;
6026
6027 /* If any dynamic relocs apply to a read-only section,
6028 then we need a DT_TEXTREL entry. */
6029 if ((info->flags & DF_TEXTREL) == 0)
6030 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6031
6032 if ((info->flags & DF_TEXTREL) != 0)
6033 {
6034 if (!add_dynamic_entry (DT_TEXTREL, 0))
6035 return FALSE;
6036 }
6037 }
6038 }
6039 #undef add_dynamic_entry
6040
6041 return TRUE;
6042 }
6043
6044 /* Determine the type of stub needed, if any, for a call. */
6045
6046 static inline enum ppc_stub_type
6047 ppc_type_of_stub (asection *input_sec,
6048 const Elf_Internal_Rela *rel,
6049 struct ppc_link_hash_entry **hash,
6050 bfd_vma destination)
6051 {
6052 struct ppc_link_hash_entry *h = *hash;
6053 bfd_vma location;
6054 bfd_vma branch_offset;
6055 bfd_vma max_branch_offset;
6056 enum elf_ppc64_reloc_type r_type;
6057
6058 if (h != NULL)
6059 {
6060 if (h->oh != NULL
6061 && h->oh->dynindx != -1)
6062 {
6063 struct plt_entry *ent;
6064 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6065 if (ent->addend == rel->r_addend
6066 && ent->plt.offset != (bfd_vma) -1)
6067 {
6068 *hash = (struct ppc_link_hash_entry *) h->oh;
6069 return ppc_stub_plt_call;
6070 }
6071 }
6072
6073 if (h->elf.root.type != bfd_link_hash_defined
6074 && h->elf.root.type != bfd_link_hash_defweak)
6075 return ppc_stub_none;
6076 }
6077
6078 /* Determine where the call point is. */
6079 location = (input_sec->output_offset
6080 + input_sec->output_section->vma
6081 + rel->r_offset);
6082
6083 branch_offset = destination - location;
6084 r_type = ELF64_R_TYPE (rel->r_info);
6085
6086 /* Determine if a long branch stub is needed. */
6087 max_branch_offset = 1 << 25;
6088 if (r_type != R_PPC64_REL24)
6089 max_branch_offset = 1 << 15;
6090
6091 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6092 /* We need a stub. Figure out whether a long_branch or plt_branch
6093 is needed later. */
6094 return ppc_stub_long_branch;
6095
6096 return ppc_stub_none;
6097 }
6098
6099 /* Build a .plt call stub. */
6100
6101 static inline bfd_byte *
6102 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6103 {
6104 #define PPC_LO(v) ((v) & 0xffff)
6105 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6106 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6107
6108 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6109 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6110 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6111 if (PPC_HA (offset + 8) != PPC_HA (offset))
6112 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6113 offset += 8;
6114 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6115 if (PPC_HA (offset + 8) != PPC_HA (offset))
6116 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6117 offset += 8;
6118 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6119 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6120 bfd_put_32 (obfd, BCTR, p), p += 4;
6121 return p;
6122 }
6123
6124 static bfd_boolean
6125 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6126 {
6127 struct ppc_stub_hash_entry *stub_entry;
6128 struct ppc_branch_hash_entry *br_entry;
6129 struct bfd_link_info *info;
6130 struct ppc_link_hash_table *htab;
6131 bfd_byte *loc;
6132 bfd_byte *p;
6133 unsigned int indx;
6134 struct plt_entry *ent;
6135 bfd_vma off;
6136 int size;
6137
6138 /* Massage our args to the form they really have. */
6139 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6140 info = in_arg;
6141
6142 htab = ppc_hash_table (info);
6143
6144 /* Make a note of the offset within the stubs for this entry. */
6145 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size;
6146 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6147
6148 htab->stub_count[stub_entry->stub_type - 1] += 1;
6149 switch (stub_entry->stub_type)
6150 {
6151 case ppc_stub_long_branch:
6152 case ppc_stub_long_branch_r2off:
6153 /* Branches are relative. This is where we are going to. */
6154 off = (stub_entry->target_value
6155 + stub_entry->target_section->output_offset
6156 + stub_entry->target_section->output_section->vma);
6157
6158 /* And this is where we are coming from. */
6159 off -= (stub_entry->stub_offset
6160 + stub_entry->stub_sec->output_offset
6161 + stub_entry->stub_sec->output_section->vma);
6162
6163 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6164 size = 4;
6165 else
6166 {
6167 bfd_vma r2off;
6168
6169 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6170 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6171 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6172 loc += 4;
6173 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6174 loc += 4;
6175 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6176 loc += 4;
6177 off -= 12;
6178 size = 16;
6179 }
6180 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6181
6182 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6183 break;
6184
6185 case ppc_stub_plt_branch:
6186 case ppc_stub_plt_branch_r2off:
6187 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6188 stub_entry->root.string + 9,
6189 FALSE, FALSE);
6190 if (br_entry == NULL)
6191 {
6192 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6193 stub_entry->root.string + 9);
6194 htab->stub_error = TRUE;
6195 return FALSE;
6196 }
6197
6198 off = (stub_entry->target_value
6199 + stub_entry->target_section->output_offset
6200 + stub_entry->target_section->output_section->vma);
6201
6202 bfd_put_64 (htab->brlt->owner, off,
6203 htab->brlt->contents + br_entry->offset);
6204
6205 if (info->shared)
6206 {
6207 /* Create a reloc for the branch lookup table entry. */
6208 Elf_Internal_Rela rela;
6209 bfd_byte *rl;
6210
6211 rela.r_offset = (br_entry->offset
6212 + htab->brlt->output_offset
6213 + htab->brlt->output_section->vma);
6214 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6215 rela.r_addend = off;
6216
6217 rl = htab->relbrlt->contents;
6218 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6219 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6220 }
6221
6222 off = (br_entry->offset
6223 + htab->brlt->output_offset
6224 + htab->brlt->output_section->vma
6225 - elf_gp (htab->brlt->output_section->owner)
6226 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6227
6228 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6229 {
6230 (*_bfd_error_handler)
6231 (_("linkage table error against `%s'"),
6232 stub_entry->root.string);
6233 bfd_set_error (bfd_error_bad_value);
6234 htab->stub_error = TRUE;
6235 return FALSE;
6236 }
6237
6238 indx = off;
6239 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6240 {
6241 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6242 loc += 4;
6243 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6244 size = 16;
6245 }
6246 else
6247 {
6248 bfd_vma r2off;
6249
6250 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6251 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6252 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6253 loc += 4;
6254 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6255 loc += 4;
6256 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6257 loc += 4;
6258 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6259 loc += 4;
6260 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6261 size = 28;
6262 }
6263 loc += 4;
6264 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6265 loc += 4;
6266 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6267 break;
6268
6269 case ppc_stub_plt_call:
6270 /* Do the best we can for shared libraries built without
6271 exporting ".foo" for each "foo". This can happen when symbol
6272 versioning scripts strip all bar a subset of symbols. */
6273 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6274 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6275 {
6276 /* Point the symbol at the stub. There may be multiple stubs,
6277 we don't really care; The main thing is to make this sym
6278 defined somewhere. Maybe defining the symbol in the stub
6279 section is a silly idea. If we didn't do this, htab->top_id
6280 could disappear. */
6281 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6282 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6283 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6284 }
6285
6286 /* Now build the stub. */
6287 off = (bfd_vma) -1;
6288 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6289 if (ent->addend == stub_entry->addend)
6290 {
6291 off = ent->plt.offset;
6292 break;
6293 }
6294 if (off >= (bfd_vma) -2)
6295 abort ();
6296
6297 off &= ~ (bfd_vma) 1;
6298 off += (htab->plt->output_offset
6299 + htab->plt->output_section->vma
6300 - elf_gp (htab->plt->output_section->owner)
6301 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6302
6303 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6304 {
6305 (*_bfd_error_handler)
6306 (_("linkage table error against `%s'"),
6307 stub_entry->h->elf.root.root.string);
6308 bfd_set_error (bfd_error_bad_value);
6309 htab->stub_error = TRUE;
6310 return FALSE;
6311 }
6312
6313 p = build_plt_stub (htab->stub_bfd, loc, off);
6314 size = p - loc;
6315 break;
6316
6317 default:
6318 BFD_FAIL ();
6319 return FALSE;
6320 }
6321
6322 stub_entry->stub_sec->_cooked_size += size;
6323
6324 if (htab->emit_stub_syms
6325 && !(stub_entry->stub_type == ppc_stub_plt_call
6326 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6327 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6328 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6329 {
6330 struct elf_link_hash_entry *h;
6331 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6332 TRUE, FALSE, FALSE);
6333 if (h == NULL)
6334 return FALSE;
6335 if (h->root.type == bfd_link_hash_new)
6336 {
6337 h->root.type = bfd_link_hash_defined;
6338 h->root.u.def.section = stub_entry->stub_sec;
6339 h->root.u.def.value = stub_entry->stub_offset;
6340 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6341 | ELF_LINK_HASH_DEF_REGULAR
6342 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6343 | ELF_LINK_FORCED_LOCAL);
6344 }
6345 }
6346
6347 return TRUE;
6348 }
6349
6350 /* As above, but don't actually build the stub. Just bump offset so
6351 we know stub section sizes, and select plt_branch stubs where
6352 long_branch stubs won't do. */
6353
6354 static bfd_boolean
6355 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6356 {
6357 struct ppc_stub_hash_entry *stub_entry;
6358 struct bfd_link_info *info;
6359 struct ppc_link_hash_table *htab;
6360 bfd_vma off;
6361 int size;
6362
6363 /* Massage our args to the form they really have. */
6364 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6365 info = in_arg;
6366
6367 htab = ppc_hash_table (info);
6368
6369 if (stub_entry->stub_type == ppc_stub_plt_call)
6370 {
6371 struct plt_entry *ent;
6372 off = (bfd_vma) -1;
6373 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6374 if (ent->addend == stub_entry->addend)
6375 {
6376 off = ent->plt.offset & ~(bfd_vma) 1;
6377 break;
6378 }
6379 if (off >= (bfd_vma) -2)
6380 abort ();
6381 off += (htab->plt->output_offset
6382 + htab->plt->output_section->vma
6383 - elf_gp (htab->plt->output_section->owner)
6384 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6385
6386 size = PLT_CALL_STUB_SIZE;
6387 if (PPC_HA (off + 16) != PPC_HA (off))
6388 size += 4;
6389 }
6390 else
6391 {
6392 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6393 variants. */
6394 off = (stub_entry->target_value
6395 + stub_entry->target_section->output_offset
6396 + stub_entry->target_section->output_section->vma);
6397 off -= (stub_entry->stub_sec->_raw_size
6398 + stub_entry->stub_sec->output_offset
6399 + stub_entry->stub_sec->output_section->vma);
6400
6401 /* Reset the stub type from the plt variant in case we now
6402 can reach with a shorter stub. */
6403 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6404 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6405
6406 size = 4;
6407 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6408 {
6409 off -= 12;
6410 size = 16;
6411 }
6412
6413 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6414 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6415 {
6416 struct ppc_branch_hash_entry *br_entry;
6417
6418 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6419 stub_entry->root.string + 9,
6420 TRUE, FALSE);
6421 if (br_entry == NULL)
6422 {
6423 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6424 stub_entry->root.string + 9);
6425 htab->stub_error = TRUE;
6426 return FALSE;
6427 }
6428
6429 if (br_entry->iter != htab->stub_iteration)
6430 {
6431 br_entry->iter = htab->stub_iteration;
6432 br_entry->offset = htab->brlt->_raw_size;
6433 htab->brlt->_raw_size += 8;
6434
6435 if (info->shared)
6436 htab->relbrlt->_raw_size += sizeof (Elf64_External_Rela);
6437 }
6438
6439 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6440 size = 16;
6441 if (stub_entry->stub_type != ppc_stub_plt_branch)
6442 size = 28;
6443 }
6444 }
6445
6446 stub_entry->stub_sec->_raw_size += size;
6447 return TRUE;
6448 }
6449
6450 /* Set up various things so that we can make a list of input sections
6451 for each output section included in the link. Returns -1 on error,
6452 0 when no stubs will be needed, and 1 on success. */
6453
6454 int
6455 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6456 {
6457 bfd *input_bfd;
6458 int top_id, top_index, id;
6459 asection *section;
6460 asection **input_list;
6461 bfd_size_type amt;
6462 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6463
6464 if (htab->brlt == NULL)
6465 return 0;
6466
6467 /* Find the top input section id. */
6468 for (input_bfd = info->input_bfds, top_id = 3;
6469 input_bfd != NULL;
6470 input_bfd = input_bfd->link_next)
6471 {
6472 for (section = input_bfd->sections;
6473 section != NULL;
6474 section = section->next)
6475 {
6476 if (top_id < section->id)
6477 top_id = section->id;
6478 }
6479 }
6480
6481 htab->top_id = top_id;
6482 amt = sizeof (struct map_stub) * (top_id + 1);
6483 htab->stub_group = bfd_zmalloc (amt);
6484 if (htab->stub_group == NULL)
6485 return -1;
6486
6487 /* Set toc_off for com, und, abs and ind sections. */
6488 for (id = 0; id < 3; id++)
6489 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6490
6491 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6492
6493 /* We can't use output_bfd->section_count here to find the top output
6494 section index as some sections may have been removed, and
6495 _bfd_strip_section_from_output doesn't renumber the indices. */
6496 for (section = output_bfd->sections, top_index = 0;
6497 section != NULL;
6498 section = section->next)
6499 {
6500 if (top_index < section->index)
6501 top_index = section->index;
6502 }
6503
6504 htab->top_index = top_index;
6505 amt = sizeof (asection *) * (top_index + 1);
6506 input_list = bfd_zmalloc (amt);
6507 htab->input_list = input_list;
6508 if (input_list == NULL)
6509 return -1;
6510
6511 return 1;
6512 }
6513
6514 /* The linker repeatedly calls this function for each TOC input section
6515 and linker generated GOT section. Group input bfds such that the toc
6516 within a group is less than 64k in size. Will break with cute linker
6517 scripts that play games with dot in the output toc section. */
6518
6519 void
6520 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6521 {
6522 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6523
6524 if (!htab->no_multi_toc)
6525 {
6526 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6527 bfd_vma off = addr - htab->toc_curr;
6528 if (off + isec->_raw_size > 0x10000)
6529 {
6530 htab->toc_curr = addr;
6531 htab->multi_toc_needed = 1;
6532 }
6533 elf_gp (isec->owner) = (htab->toc_curr
6534 - elf_gp (isec->output_section->owner)
6535 + TOC_BASE_OFF);
6536 }
6537 }
6538
6539 /* Called after the last call to the above function. */
6540
6541 void
6542 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6543 struct bfd_link_info *info)
6544 {
6545 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6546
6547 /* toc_curr tracks the TOC offset used for code sections below in
6548 ppc64_elf_next_input_section. Start off at 0x8000. */
6549 htab->toc_curr = TOC_BASE_OFF;
6550 }
6551
6552 /* No toc references were found in ISEC. If the code in ISEC makes no
6553 calls, then there's no need to use toc adjusting stubs when branching
6554 into ISEC. Actually, indirect calls from ISEC are OK as they will
6555 load r2. */
6556
6557 static int
6558 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6559 {
6560 bfd_byte *contents;
6561 bfd_size_type i;
6562 int ret;
6563 int branch_ok;
6564
6565 /* We know none of our code bearing sections will need toc stubs. */
6566 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6567 return 0;
6568
6569 /* Hack for linux kernel. .fixup contains branches, but only back to
6570 the function that hit an exception. */
6571 branch_ok = strcmp (isec->name, ".fixup") == 0;
6572
6573 contents = elf_section_data (isec)->this_hdr.contents;
6574 if (contents == NULL)
6575 {
6576 contents = bfd_malloc (isec->_raw_size);
6577 if (contents == NULL)
6578 return -1;
6579 if (! bfd_get_section_contents (isec->owner, isec, contents,
6580 0, isec->_raw_size))
6581 {
6582 free (contents);
6583 return -1;
6584 }
6585 if (info->keep_memory)
6586 elf_section_data (isec)->this_hdr.contents = contents;
6587 }
6588
6589 /* Code scan, because we don't necessarily have relocs on calls to
6590 static functions. */
6591 ret = 0;
6592 for (i = 0; i < isec->_raw_size; i += 4)
6593 {
6594 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6595 /* Is this a branch? */
6596 if ((insn & (0x3f << 26)) == (18 << 26)
6597 /* If branch and link, it's a function call. */
6598 && ((insn & 1) != 0
6599 /* Sibling calls use a plain branch. I don't know a way
6600 of deciding whether a branch is really a sibling call. */
6601 || !branch_ok))
6602 {
6603 ret = 1;
6604 break;
6605 }
6606 }
6607
6608 if (elf_section_data (isec)->this_hdr.contents != contents)
6609 free (contents);
6610 return ret;
6611 }
6612
6613 /* The linker repeatedly calls this function for each input section,
6614 in the order that input sections are linked into output sections.
6615 Build lists of input sections to determine groupings between which
6616 we may insert linker stubs. */
6617
6618 bfd_boolean
6619 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6620 {
6621 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6622 int ret;
6623
6624 if ((isec->output_section->flags & SEC_CODE) != 0
6625 && isec->output_section->index <= htab->top_index)
6626 {
6627 asection **list = htab->input_list + isec->output_section->index;
6628 /* Steal the link_sec pointer for our list. */
6629 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6630 /* This happens to make the list in reverse order,
6631 which is what we want. */
6632 PREV_SEC (isec) = *list;
6633 *list = isec;
6634 }
6635
6636 /* If a code section has a function that uses the TOC then we need
6637 to use the right TOC (obviously). Also, make sure that .opd gets
6638 the correct TOC value for R_PPC64_TOC relocs that don't have or
6639 can't find their function symbol (shouldn't ever happen now). */
6640 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6641 {
6642 if (elf_gp (isec->owner) != 0)
6643 htab->toc_curr = elf_gp (isec->owner);
6644 }
6645 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6646 return FALSE;
6647 else
6648 isec->has_gp_reloc = ret;
6649
6650 /* Functions that don't use the TOC can belong in any TOC group.
6651 Use the last TOC base. This happens to make _init and _fini
6652 pasting work. */
6653 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6654 return TRUE;
6655 }
6656
6657 /* See whether we can group stub sections together. Grouping stub
6658 sections may result in fewer stubs. More importantly, we need to
6659 put all .init* and .fini* stubs at the beginning of the .init or
6660 .fini output sections respectively, because glibc splits the
6661 _init and _fini functions into multiple parts. Putting a stub in
6662 the middle of a function is not a good idea. */
6663
6664 static void
6665 group_sections (struct ppc_link_hash_table *htab,
6666 bfd_size_type stub_group_size,
6667 bfd_boolean stubs_always_before_branch)
6668 {
6669 asection **list = htab->input_list + htab->top_index;
6670 do
6671 {
6672 asection *tail = *list;
6673 while (tail != NULL)
6674 {
6675 asection *curr;
6676 asection *prev;
6677 bfd_size_type total;
6678 bfd_boolean big_sec;
6679 bfd_vma curr_toc;
6680
6681 curr = tail;
6682 if (tail->_cooked_size)
6683 total = tail->_cooked_size;
6684 else
6685 total = tail->_raw_size;
6686 big_sec = total >= stub_group_size;
6687 curr_toc = htab->stub_group[tail->id].toc_off;
6688
6689 while ((prev = PREV_SEC (curr)) != NULL
6690 && ((total += curr->output_offset - prev->output_offset)
6691 < stub_group_size)
6692 && htab->stub_group[prev->id].toc_off == curr_toc)
6693 curr = prev;
6694
6695 /* OK, the size from the start of CURR to the end is less
6696 than stub_group_size and thus can be handled by one stub
6697 section. (or the tail section is itself larger than
6698 stub_group_size, in which case we may be toast.) We
6699 should really be keeping track of the total size of stubs
6700 added here, as stubs contribute to the final output
6701 section size. That's a little tricky, and this way will
6702 only break if stubs added make the total size more than
6703 2^25, ie. for the default stub_group_size, if stubs total
6704 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6705 do
6706 {
6707 prev = PREV_SEC (tail);
6708 /* Set up this stub group. */
6709 htab->stub_group[tail->id].link_sec = curr;
6710 }
6711 while (tail != curr && (tail = prev) != NULL);
6712
6713 /* But wait, there's more! Input sections up to stub_group_size
6714 bytes before the stub section can be handled by it too.
6715 Don't do this if we have a really large section after the
6716 stubs, as adding more stubs increases the chance that
6717 branches may not reach into the stub section. */
6718 if (!stubs_always_before_branch && !big_sec)
6719 {
6720 total = 0;
6721 while (prev != NULL
6722 && ((total += tail->output_offset - prev->output_offset)
6723 < stub_group_size)
6724 && htab->stub_group[prev->id].toc_off == curr_toc)
6725 {
6726 tail = prev;
6727 prev = PREV_SEC (tail);
6728 htab->stub_group[tail->id].link_sec = curr;
6729 }
6730 }
6731 tail = prev;
6732 }
6733 }
6734 while (list-- != htab->input_list);
6735 free (htab->input_list);
6736 #undef PREV_SEC
6737 }
6738
6739 /* Determine and set the size of the stub section for a final link.
6740
6741 The basic idea here is to examine all the relocations looking for
6742 PC-relative calls to a target that is unreachable with a "bl"
6743 instruction. */
6744
6745 bfd_boolean
6746 ppc64_elf_size_stubs (bfd *output_bfd,
6747 struct bfd_link_info *info,
6748 bfd_signed_vma group_size,
6749 asection *(*add_stub_section) (const char *, asection *),
6750 void (*layout_sections_again) (void))
6751 {
6752 bfd_size_type stub_group_size;
6753 bfd_boolean stubs_always_before_branch;
6754 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6755
6756 /* Stash our params away. */
6757 htab->add_stub_section = add_stub_section;
6758 htab->layout_sections_again = layout_sections_again;
6759 stubs_always_before_branch = group_size < 0;
6760 if (group_size < 0)
6761 stub_group_size = -group_size;
6762 else
6763 stub_group_size = group_size;
6764 if (stub_group_size == 1)
6765 {
6766 /* Default values. */
6767 if (stubs_always_before_branch)
6768 {
6769 stub_group_size = 0x1e00000;
6770 if (htab->has_14bit_branch)
6771 stub_group_size = 0x7800;
6772 }
6773 else
6774 {
6775 stub_group_size = 0x1c00000;
6776 if (htab->has_14bit_branch)
6777 stub_group_size = 0x7000;
6778 }
6779 }
6780
6781 group_sections (htab, stub_group_size, stubs_always_before_branch);
6782
6783 while (1)
6784 {
6785 bfd *input_bfd;
6786 unsigned int bfd_indx;
6787 asection *stub_sec;
6788 bfd_boolean stub_changed;
6789
6790 htab->stub_iteration += 1;
6791 stub_changed = FALSE;
6792
6793 for (input_bfd = info->input_bfds, bfd_indx = 0;
6794 input_bfd != NULL;
6795 input_bfd = input_bfd->link_next, bfd_indx++)
6796 {
6797 Elf_Internal_Shdr *symtab_hdr;
6798 asection *section;
6799 Elf_Internal_Sym *local_syms = NULL;
6800
6801 /* We'll need the symbol table in a second. */
6802 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6803 if (symtab_hdr->sh_info == 0)
6804 continue;
6805
6806 /* Walk over each section attached to the input bfd. */
6807 for (section = input_bfd->sections;
6808 section != NULL;
6809 section = section->next)
6810 {
6811 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6812
6813 /* If there aren't any relocs, then there's nothing more
6814 to do. */
6815 if ((section->flags & SEC_RELOC) == 0
6816 || section->reloc_count == 0)
6817 continue;
6818
6819 /* If this section is a link-once section that will be
6820 discarded, then don't create any stubs. */
6821 if (section->output_section == NULL
6822 || section->output_section->owner != output_bfd)
6823 continue;
6824
6825 /* Get the relocs. */
6826 internal_relocs
6827 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6828 info->keep_memory);
6829 if (internal_relocs == NULL)
6830 goto error_ret_free_local;
6831
6832 /* Now examine each relocation. */
6833 irela = internal_relocs;
6834 irelaend = irela + section->reloc_count;
6835 for (; irela < irelaend; irela++)
6836 {
6837 enum elf_ppc64_reloc_type r_type;
6838 unsigned int r_indx;
6839 enum ppc_stub_type stub_type;
6840 struct ppc_stub_hash_entry *stub_entry;
6841 asection *sym_sec;
6842 bfd_vma sym_value;
6843 bfd_vma destination;
6844 struct ppc_link_hash_entry *hash;
6845 struct elf_link_hash_entry *h;
6846 Elf_Internal_Sym *sym;
6847 char *stub_name;
6848 const asection *id_sec;
6849
6850 r_type = ELF64_R_TYPE (irela->r_info);
6851 r_indx = ELF64_R_SYM (irela->r_info);
6852
6853 if (r_type >= R_PPC64_max)
6854 {
6855 bfd_set_error (bfd_error_bad_value);
6856 goto error_ret_free_internal;
6857 }
6858
6859 /* Only look for stubs on branch instructions. */
6860 if (r_type != R_PPC64_REL24
6861 && r_type != R_PPC64_REL14
6862 && r_type != R_PPC64_REL14_BRTAKEN
6863 && r_type != R_PPC64_REL14_BRNTAKEN)
6864 continue;
6865
6866 /* Now determine the call target, its name, value,
6867 section. */
6868 destination = 0;
6869 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6870 r_indx, input_bfd))
6871 goto error_ret_free_internal;
6872 hash = (struct ppc_link_hash_entry *) h;
6873
6874 if (hash == NULL)
6875 {
6876 /* It's a local symbol. */
6877 sym_value = sym->st_value;
6878 destination = (sym_value + irela->r_addend
6879 + sym_sec->output_offset
6880 + sym_sec->output_section->vma);
6881 }
6882 else
6883 {
6884 /* It's an external symbol. */
6885 sym_value = 0;
6886 if (hash->elf.root.type == bfd_link_hash_defined
6887 || hash->elf.root.type == bfd_link_hash_defweak)
6888 {
6889 sym_value = hash->elf.root.u.def.value;
6890 if (sym_sec->output_section != NULL)
6891 destination = (sym_value + irela->r_addend
6892 + sym_sec->output_offset
6893 + sym_sec->output_section->vma);
6894 }
6895 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6896 ;
6897 else if (hash->elf.root.type == bfd_link_hash_undefined)
6898 ;
6899 else
6900 {
6901 bfd_set_error (bfd_error_bad_value);
6902 goto error_ret_free_internal;
6903 }
6904 }
6905
6906 /* Determine what (if any) linker stub is needed. */
6907 stub_type = ppc_type_of_stub (section, irela, &hash,
6908 destination);
6909
6910 if (stub_type != ppc_stub_plt_call)
6911 {
6912 /* Check whether we need a TOC adjusting stub.
6913 Since the linker pastes together pieces from
6914 different object files when creating the
6915 _init and _fini functions, it may be that a
6916 call to what looks like a local sym is in
6917 fact a call needing a TOC adjustment. */
6918 if (sym_sec != NULL
6919 && sym_sec->output_section != NULL
6920 && (htab->stub_group[sym_sec->id].toc_off
6921 != htab->stub_group[section->id].toc_off)
6922 && sym_sec->has_gp_reloc
6923 && section->has_gp_reloc)
6924 stub_type = ppc_stub_long_branch_r2off;
6925 }
6926
6927 if (stub_type == ppc_stub_none)
6928 continue;
6929
6930 /* __tls_get_addr calls might be eliminated. */
6931 if (stub_type != ppc_stub_plt_call
6932 && hash != NULL
6933 && &hash->elf == htab->tls_get_addr
6934 && section->has_tls_reloc
6935 && irela != internal_relocs)
6936 {
6937 /* Get tls info. */
6938 char *tls_mask;
6939
6940 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
6941 irela - 1, input_bfd))
6942 goto error_ret_free_internal;
6943 if (*tls_mask != 0)
6944 continue;
6945 }
6946
6947 /* Support for grouping stub sections. */
6948 id_sec = htab->stub_group[section->id].link_sec;
6949
6950 /* Get the name of this stub. */
6951 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
6952 if (!stub_name)
6953 goto error_ret_free_internal;
6954
6955 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
6956 stub_name, FALSE, FALSE);
6957 if (stub_entry != NULL)
6958 {
6959 /* The proper stub has already been created. */
6960 free (stub_name);
6961 continue;
6962 }
6963
6964 stub_entry = ppc_add_stub (stub_name, section, htab);
6965 if (stub_entry == NULL)
6966 {
6967 free (stub_name);
6968 error_ret_free_internal:
6969 if (elf_section_data (section)->relocs == NULL)
6970 free (internal_relocs);
6971 error_ret_free_local:
6972 if (local_syms != NULL
6973 && (symtab_hdr->contents
6974 != (unsigned char *) local_syms))
6975 free (local_syms);
6976 return FALSE;
6977 }
6978
6979 stub_entry->stub_type = stub_type;
6980 stub_entry->target_value = sym_value;
6981 stub_entry->target_section = sym_sec;
6982 stub_entry->h = hash;
6983 stub_entry->addend = irela->r_addend;
6984 stub_changed = TRUE;
6985 }
6986
6987 /* We're done with the internal relocs, free them. */
6988 if (elf_section_data (section)->relocs != internal_relocs)
6989 free (internal_relocs);
6990 }
6991
6992 if (local_syms != NULL
6993 && symtab_hdr->contents != (unsigned char *) local_syms)
6994 {
6995 if (!info->keep_memory)
6996 free (local_syms);
6997 else
6998 symtab_hdr->contents = (unsigned char *) local_syms;
6999 }
7000 }
7001
7002 if (!stub_changed)
7003 break;
7004
7005 /* OK, we've added some stubs. Find out the new size of the
7006 stub sections. */
7007 for (stub_sec = htab->stub_bfd->sections;
7008 stub_sec != NULL;
7009 stub_sec = stub_sec->next)
7010 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7011 {
7012 stub_sec->_raw_size = 0;
7013 stub_sec->_cooked_size = 0;
7014 }
7015 htab->brlt->_raw_size = 0;
7016 htab->brlt->_cooked_size = 0;
7017 if (info->shared)
7018 {
7019 htab->relbrlt->_raw_size = 0;
7020 htab->relbrlt->_cooked_size = 0;
7021 }
7022
7023 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
7024
7025 /* Ask the linker to do its stuff. */
7026 (*htab->layout_sections_again) ();
7027 }
7028
7029 /* It would be nice to strip .branch_lt from the output if the
7030 section is empty, but it's too late. If we strip sections here,
7031 the dynamic symbol table is corrupted since the section symbol
7032 for the stripped section isn't written. */
7033
7034 return TRUE;
7035 }
7036
7037 /* Called after we have determined section placement. If sections
7038 move, we'll be called again. Provide a value for TOCstart. */
7039
7040 bfd_vma
7041 ppc64_elf_toc (bfd *obfd)
7042 {
7043 asection *s;
7044 bfd_vma TOCstart;
7045
7046 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7047 order. The TOC starts where the first of these sections starts. */
7048 s = bfd_get_section_by_name (obfd, ".got");
7049 if (s == NULL)
7050 s = bfd_get_section_by_name (obfd, ".toc");
7051 if (s == NULL)
7052 s = bfd_get_section_by_name (obfd, ".tocbss");
7053 if (s == NULL)
7054 s = bfd_get_section_by_name (obfd, ".plt");
7055 if (s == NULL)
7056 {
7057 /* This may happen for
7058 o references to TOC base (SYM@toc / TOC[tc0]) without a
7059 .toc directive
7060 o bad linker script
7061 o --gc-sections and empty TOC sections
7062
7063 FIXME: Warn user? */
7064
7065 /* Look for a likely section. We probably won't even be
7066 using TOCstart. */
7067 for (s = obfd->sections; s != NULL; s = s->next)
7068 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7069 == (SEC_ALLOC | SEC_SMALL_DATA))
7070 break;
7071 if (s == NULL)
7072 for (s = obfd->sections; s != NULL; s = s->next)
7073 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7074 == (SEC_ALLOC | SEC_SMALL_DATA))
7075 break;
7076 if (s == NULL)
7077 for (s = obfd->sections; s != NULL; s = s->next)
7078 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7079 break;
7080 if (s == NULL)
7081 for (s = obfd->sections; s != NULL; s = s->next)
7082 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7083 break;
7084 }
7085
7086 TOCstart = 0;
7087 if (s != NULL)
7088 TOCstart = s->output_section->vma + s->output_offset;
7089
7090 return TOCstart;
7091 }
7092
7093 /* Build all the stubs associated with the current output file.
7094 The stubs are kept in a hash table attached to the main linker
7095 hash table. This function is called via gldelf64ppc_finish. */
7096
7097 bfd_boolean
7098 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7099 struct bfd_link_info *info,
7100 char **stats)
7101 {
7102 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7103 asection *stub_sec;
7104 bfd_byte *p;
7105 int stub_sec_count = 0;
7106
7107 htab->emit_stub_syms = emit_stub_syms;
7108 for (stub_sec = htab->stub_bfd->sections;
7109 stub_sec != NULL;
7110 stub_sec = stub_sec->next)
7111 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7112 {
7113 bfd_size_type size;
7114
7115 /* Allocate memory to hold the linker stubs. */
7116 size = stub_sec->_raw_size;
7117 if (size != 0)
7118 {
7119 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7120 if (stub_sec->contents == NULL)
7121 return FALSE;
7122 }
7123 stub_sec->_cooked_size = 0;
7124 }
7125
7126 if (htab->plt != NULL)
7127 {
7128 unsigned int indx;
7129 bfd_vma plt0;
7130
7131 /* Build the .glink plt call stub. */
7132 plt0 = (htab->plt->output_section->vma
7133 + htab->plt->output_offset
7134 - (htab->glink->output_section->vma
7135 + htab->glink->output_offset
7136 + GLINK_CALL_STUB_SIZE));
7137 if (plt0 + 0x80008000 > 0xffffffff)
7138 {
7139 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7140 bfd_set_error (bfd_error_bad_value);
7141 return FALSE;
7142 }
7143
7144 if (htab->emit_stub_syms)
7145 {
7146 struct elf_link_hash_entry *h;
7147 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7148 if (h == NULL)
7149 return FALSE;
7150 if (h->root.type == bfd_link_hash_new)
7151 {
7152 h->root.type = bfd_link_hash_defined;
7153 h->root.u.def.section = htab->glink;
7154 h->root.u.def.value = 0;
7155 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7156 | ELF_LINK_HASH_DEF_REGULAR
7157 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7158 | ELF_LINK_FORCED_LOCAL);
7159 }
7160 }
7161 p = htab->glink->contents;
7162 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7163 p += 4;
7164 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7165 p += 4;
7166 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7167 p += 4;
7168 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7169 p += 4;
7170 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7171 p += 4;
7172 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7173 p += 4;
7174 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7175 p += 4;
7176 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7177 p += 4;
7178 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7179 p += 4;
7180 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7181 p += 4;
7182 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7183 p += 4;
7184 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7185 p += 4;
7186 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7187 p += 4;
7188 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7189 p += 4;
7190 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7191 p += 4;
7192 bfd_put_32 (htab->glink->owner, BCTR, p);
7193 p += 4;
7194
7195 /* Build the .glink lazy link call stubs. */
7196 indx = 0;
7197 while (p < htab->glink->contents + htab->glink->_raw_size)
7198 {
7199 if (indx < 0x8000)
7200 {
7201 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7202 p += 4;
7203 }
7204 else
7205 {
7206 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7207 p += 4;
7208 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7209 p += 4;
7210 }
7211 bfd_put_32 (htab->glink->owner,
7212 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7213 indx++;
7214 p += 4;
7215 }
7216 htab->glink->_cooked_size = p - htab->glink->contents;
7217 }
7218
7219 if (htab->brlt->_raw_size != 0)
7220 {
7221 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7222 htab->brlt->_raw_size);
7223 if (htab->brlt->contents == NULL)
7224 return FALSE;
7225 }
7226 if (info->shared && htab->relbrlt->_raw_size != 0)
7227 {
7228 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
7229 htab->relbrlt->_raw_size);
7230 if (htab->relbrlt->contents == NULL)
7231 return FALSE;
7232 }
7233
7234 /* Build the stubs as directed by the stub hash table. */
7235 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7236
7237 for (stub_sec = htab->stub_bfd->sections;
7238 stub_sec != NULL;
7239 stub_sec = stub_sec->next)
7240 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7241 {
7242 stub_sec_count += 1;
7243 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7244 break;
7245 }
7246
7247 if (stub_sec != NULL
7248 || htab->glink->_raw_size != htab->glink->_cooked_size)
7249 {
7250 htab->stub_error = TRUE;
7251 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7252 }
7253
7254 if (htab->stub_error)
7255 return FALSE;
7256
7257 if (stats != NULL)
7258 {
7259 *stats = bfd_malloc (500);
7260 if (*stats == NULL)
7261 return FALSE;
7262
7263 sprintf (*stats, _("linker stubs in %u groups\n"
7264 " branch %lu\n"
7265 " toc adjust %lu\n"
7266 " long branch %lu\n"
7267 " long toc adj %lu\n"
7268 " plt call %lu"),
7269 stub_sec_count,
7270 htab->stub_count[ppc_stub_long_branch - 1],
7271 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7272 htab->stub_count[ppc_stub_plt_branch - 1],
7273 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7274 htab->stub_count[ppc_stub_plt_call - 1]);
7275 }
7276 return TRUE;
7277 }
7278
7279 /* The RELOCATE_SECTION function is called by the ELF backend linker
7280 to handle the relocations for a section.
7281
7282 The relocs are always passed as Rela structures; if the section
7283 actually uses Rel structures, the r_addend field will always be
7284 zero.
7285
7286 This function is responsible for adjust the section contents as
7287 necessary, and (if using Rela relocs and generating a
7288 relocatable output file) adjusting the reloc addend as
7289 necessary.
7290
7291 This function does not have to worry about setting the reloc
7292 address or the reloc symbol index.
7293
7294 LOCAL_SYMS is a pointer to the swapped in local symbols.
7295
7296 LOCAL_SECTIONS is an array giving the section in the input file
7297 corresponding to the st_shndx field of each local symbol.
7298
7299 The global hash table entry for the global symbols can be found
7300 via elf_sym_hashes (input_bfd).
7301
7302 When generating relocatable output, this function must handle
7303 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7304 going to be the section symbol corresponding to the output
7305 section, which means that the addend must be adjusted
7306 accordingly. */
7307
7308 static bfd_boolean
7309 ppc64_elf_relocate_section (bfd *output_bfd,
7310 struct bfd_link_info *info,
7311 bfd *input_bfd,
7312 asection *input_section,
7313 bfd_byte *contents,
7314 Elf_Internal_Rela *relocs,
7315 Elf_Internal_Sym *local_syms,
7316 asection **local_sections)
7317 {
7318 struct ppc_link_hash_table *htab;
7319 Elf_Internal_Shdr *symtab_hdr;
7320 struct elf_link_hash_entry **sym_hashes;
7321 Elf_Internal_Rela *rel;
7322 Elf_Internal_Rela *relend;
7323 Elf_Internal_Rela outrel;
7324 bfd_byte *loc;
7325 struct got_entry **local_got_ents;
7326 bfd_vma TOCstart;
7327 bfd_boolean ret = TRUE;
7328 bfd_boolean is_opd;
7329 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7330 bfd_boolean is_power4 = FALSE;
7331
7332 if (info->relocatable)
7333 return TRUE;
7334
7335 /* Initialize howto table if needed. */
7336 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7337 ppc_howto_init ();
7338
7339 htab = ppc_hash_table (info);
7340 local_got_ents = elf_local_got_ents (input_bfd);
7341 TOCstart = elf_gp (output_bfd);
7342 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7343 sym_hashes = elf_sym_hashes (input_bfd);
7344 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7345
7346 rel = relocs;
7347 relend = relocs + input_section->reloc_count;
7348 for (; rel < relend; rel++)
7349 {
7350 enum elf_ppc64_reloc_type r_type;
7351 bfd_vma addend;
7352 bfd_reloc_status_type r;
7353 Elf_Internal_Sym *sym;
7354 asection *sec;
7355 struct elf_link_hash_entry *h;
7356 struct elf_link_hash_entry *fdh;
7357 const char *sym_name;
7358 unsigned long r_symndx, toc_symndx;
7359 char tls_mask, tls_gd, tls_type;
7360 char sym_type;
7361 bfd_vma relocation;
7362 bfd_boolean unresolved_reloc;
7363 bfd_boolean warned;
7364 unsigned long insn, mask;
7365 struct ppc_stub_hash_entry *stub_entry;
7366 bfd_vma max_br_offset;
7367 bfd_vma from;
7368
7369 r_type = ELF64_R_TYPE (rel->r_info);
7370 r_symndx = ELF64_R_SYM (rel->r_info);
7371
7372 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7373 symbol of the previous ADDR64 reloc. The symbol gives us the
7374 proper TOC base to use. */
7375 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7376 && rel != relocs
7377 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7378 && is_opd)
7379 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7380
7381 sym = NULL;
7382 sec = NULL;
7383 h = NULL;
7384 sym_name = NULL;
7385 unresolved_reloc = FALSE;
7386 warned = FALSE;
7387
7388 if (r_symndx < symtab_hdr->sh_info)
7389 {
7390 /* It's a local symbol. */
7391 sym = local_syms + r_symndx;
7392 sec = local_sections[r_symndx];
7393 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7394 sym_type = ELF64_ST_TYPE (sym->st_info);
7395 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7396 if (elf_section_data (sec) != NULL)
7397 {
7398 long *opd_sym_adjust;
7399
7400 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7401 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
7402 relocation += opd_sym_adjust[sym->st_value / 24];
7403 }
7404 }
7405 else
7406 {
7407 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
7408 symtab_hdr, relocation, sec,
7409 unresolved_reloc, info,
7410 warned);
7411 sym_name = h->root.root.string;
7412 sym_type = h->type;
7413 }
7414
7415 /* TLS optimizations. Replace instruction sequences and relocs
7416 based on information we collected in tls_optimize. We edit
7417 RELOCS so that --emit-relocs will output something sensible
7418 for the final instruction stream. */
7419 tls_mask = 0;
7420 tls_gd = 0;
7421 toc_symndx = 0;
7422 if (IS_PPC64_TLS_RELOC (r_type))
7423 {
7424 if (h != NULL)
7425 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7426 else if (local_got_ents != NULL)
7427 {
7428 char *lgot_masks;
7429 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7430 tls_mask = lgot_masks[r_symndx];
7431 }
7432 if (tls_mask == 0 && r_type == R_PPC64_TLS)
7433 {
7434 /* Check for toc tls entries. */
7435 char *toc_tls;
7436
7437 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7438 rel, input_bfd))
7439 return FALSE;
7440
7441 if (toc_tls)
7442 tls_mask = *toc_tls;
7443 }
7444 }
7445
7446 /* Check that tls relocs are used with tls syms, and non-tls
7447 relocs are used with non-tls syms. */
7448 if (r_symndx != 0
7449 && r_type != R_PPC64_NONE
7450 && (h == NULL
7451 || h->root.type == bfd_link_hash_defined
7452 || h->root.type == bfd_link_hash_defweak)
7453 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7454 {
7455 if (r_type == R_PPC64_TLS && tls_mask != 0)
7456 /* R_PPC64_TLS is OK against a symbol in the TOC. */
7457 ;
7458 else
7459 (*_bfd_error_handler)
7460 (sym_type == STT_TLS
7461 ? _("%s(%s+0x%lx): %s used with TLS symbol %s")
7462 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"),
7463 bfd_archive_filename (input_bfd),
7464 input_section->name,
7465 (long) rel->r_offset,
7466 ppc64_elf_howto_table[r_type]->name,
7467 sym_name);
7468 }
7469
7470 /* Ensure reloc mapping code below stays sane. */
7471 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7472 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7473 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7474 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7475 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7476 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7477 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7478 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7479 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7480 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7481 abort ();
7482
7483 switch (r_type)
7484 {
7485 default:
7486 break;
7487
7488 case R_PPC64_TOC16:
7489 case R_PPC64_TOC16_LO:
7490 case R_PPC64_TOC16_DS:
7491 case R_PPC64_TOC16_LO_DS:
7492 {
7493 /* Check for toc tls entries. */
7494 char *toc_tls;
7495 int retval;
7496
7497 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7498 rel, input_bfd);
7499 if (retval == 0)
7500 return FALSE;
7501
7502 if (toc_tls)
7503 {
7504 tls_mask = *toc_tls;
7505 if (r_type == R_PPC64_TOC16_DS
7506 || r_type == R_PPC64_TOC16_LO_DS)
7507 {
7508 if (tls_mask != 0
7509 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7510 goto toctprel;
7511 }
7512 else
7513 {
7514 /* If we found a GD reloc pair, then we might be
7515 doing a GD->IE transition. */
7516 if (retval == 2)
7517 {
7518 tls_gd = TLS_TPRELGD;
7519 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7520 goto tls_get_addr_check;
7521 }
7522 else if (retval == 3)
7523 {
7524 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7525 goto tls_get_addr_check;
7526 }
7527 }
7528 }
7529 }
7530 break;
7531
7532 case R_PPC64_GOT_TPREL16_DS:
7533 case R_PPC64_GOT_TPREL16_LO_DS:
7534 if (tls_mask != 0
7535 && (tls_mask & TLS_TPREL) == 0)
7536 {
7537 toctprel:
7538 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7539 insn &= 31 << 21;
7540 insn |= 0x3c0d0000; /* addis 0,13,0 */
7541 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7542 r_type = R_PPC64_TPREL16_HA;
7543 if (toc_symndx != 0)
7544 {
7545 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7546 /* We changed the symbol. Start over in order to
7547 get h, sym, sec etc. right. */
7548 rel--;
7549 continue;
7550 }
7551 else
7552 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7553 }
7554 break;
7555
7556 case R_PPC64_TLS:
7557 if (tls_mask != 0
7558 && (tls_mask & TLS_TPREL) == 0)
7559 {
7560 bfd_vma rtra;
7561 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7562 if ((insn & ((0x3f << 26) | (31 << 11)))
7563 == ((31 << 26) | (13 << 11)))
7564 rtra = insn & ((1 << 26) - (1 << 16));
7565 else if ((insn & ((0x3f << 26) | (31 << 16)))
7566 == ((31 << 26) | (13 << 16)))
7567 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7568 else
7569 abort ();
7570 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7571 /* add -> addi. */
7572 insn = 14 << 26;
7573 else if ((insn & (31 << 1)) == 23 << 1
7574 && ((insn & (31 << 6)) < 14 << 6
7575 || ((insn & (31 << 6)) >= 16 << 6
7576 && (insn & (31 << 6)) < 24 << 6)))
7577 /* load and store indexed -> dform. */
7578 insn = (32 | ((insn >> 6) & 31)) << 26;
7579 else if ((insn & (31 << 1)) == 21 << 1
7580 && (insn & (0x1a << 6)) == 0)
7581 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7582 insn = (((58 | ((insn >> 6) & 4)) << 26)
7583 | ((insn >> 6) & 1));
7584 else if ((insn & (31 << 1)) == 21 << 1
7585 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7586 /* lwax -> lwa. */
7587 insn = (58 << 26) | 2;
7588 else
7589 abort ();
7590 insn |= rtra;
7591 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7592 /* Was PPC64_TLS which sits on insn boundary, now
7593 PPC64_TPREL16_LO which is at insn+2. */
7594 rel->r_offset += 2;
7595 r_type = R_PPC64_TPREL16_LO;
7596 if (toc_symndx != 0)
7597 {
7598 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7599 /* We changed the symbol. Start over in order to
7600 get h, sym, sec etc. right. */
7601 rel--;
7602 continue;
7603 }
7604 else
7605 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7606 }
7607 break;
7608
7609 case R_PPC64_GOT_TLSGD16_HI:
7610 case R_PPC64_GOT_TLSGD16_HA:
7611 tls_gd = TLS_TPRELGD;
7612 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7613 goto tls_gdld_hi;
7614 break;
7615
7616 case R_PPC64_GOT_TLSLD16_HI:
7617 case R_PPC64_GOT_TLSLD16_HA:
7618 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7619 {
7620 tls_gdld_hi:
7621 if ((tls_mask & tls_gd) != 0)
7622 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7623 + R_PPC64_GOT_TPREL16_DS);
7624 else
7625 {
7626 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7627 rel->r_offset -= 2;
7628 r_type = R_PPC64_NONE;
7629 }
7630 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7631 }
7632 break;
7633
7634 case R_PPC64_GOT_TLSGD16:
7635 case R_PPC64_GOT_TLSGD16_LO:
7636 tls_gd = TLS_TPRELGD;
7637 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7638 goto tls_get_addr_check;
7639 break;
7640
7641 case R_PPC64_GOT_TLSLD16:
7642 case R_PPC64_GOT_TLSLD16_LO:
7643 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7644 {
7645 tls_get_addr_check:
7646 if (rel + 1 < relend)
7647 {
7648 enum elf_ppc64_reloc_type r_type2;
7649 unsigned long r_symndx2;
7650 struct elf_link_hash_entry *h2;
7651 bfd_vma insn1, insn2, insn3;
7652 bfd_vma offset;
7653
7654 /* The next instruction should be a call to
7655 __tls_get_addr. Peek at the reloc to be sure. */
7656 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7657 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7658 if (r_symndx2 < symtab_hdr->sh_info
7659 || (r_type2 != R_PPC64_REL14
7660 && r_type2 != R_PPC64_REL14_BRTAKEN
7661 && r_type2 != R_PPC64_REL14_BRNTAKEN
7662 && r_type2 != R_PPC64_REL24))
7663 break;
7664
7665 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7666 while (h2->root.type == bfd_link_hash_indirect
7667 || h2->root.type == bfd_link_hash_warning)
7668 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7669 if (h2 == NULL || h2 != htab->tls_get_addr)
7670 break;
7671
7672 /* OK, it checks out. Replace the call. */
7673 offset = rel[1].r_offset;
7674 insn1 = bfd_get_32 (output_bfd,
7675 contents + rel->r_offset - 2);
7676 insn3 = bfd_get_32 (output_bfd,
7677 contents + offset + 4);
7678 if ((tls_mask & tls_gd) != 0)
7679 {
7680 /* IE */
7681 insn1 &= (1 << 26) - (1 << 2);
7682 insn1 |= 58 << 26; /* ld */
7683 insn2 = 0x7c636a14; /* add 3,3,13 */
7684 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7685 if ((tls_mask & TLS_EXPLICIT) == 0)
7686 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7687 + R_PPC64_GOT_TPREL16_DS);
7688 else
7689 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7690 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7691 }
7692 else
7693 {
7694 /* LE */
7695 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7696 insn2 = 0x38630000; /* addi 3,3,0 */
7697 if (tls_gd == 0)
7698 {
7699 /* Was an LD reloc. */
7700 r_symndx = 0;
7701 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7702 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7703 }
7704 else if (toc_symndx != 0)
7705 r_symndx = toc_symndx;
7706 r_type = R_PPC64_TPREL16_HA;
7707 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7708 rel[1].r_info = ELF64_R_INFO (r_symndx,
7709 R_PPC64_TPREL16_LO);
7710 rel[1].r_offset += 2;
7711 }
7712 if (insn3 == NOP
7713 || insn3 == CROR_151515 || insn3 == CROR_313131)
7714 {
7715 insn3 = insn2;
7716 insn2 = NOP;
7717 rel[1].r_offset += 4;
7718 }
7719 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7720 bfd_put_32 (output_bfd, insn2, contents + offset);
7721 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7722 if (tls_gd == 0 || toc_symndx != 0)
7723 {
7724 /* We changed the symbol. Start over in order
7725 to get h, sym, sec etc. right. */
7726 rel--;
7727 continue;
7728 }
7729 }
7730 }
7731 break;
7732
7733 case R_PPC64_DTPMOD64:
7734 if (rel + 1 < relend
7735 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7736 && rel[1].r_offset == rel->r_offset + 8)
7737 {
7738 if ((tls_mask & TLS_GD) == 0)
7739 {
7740 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7741 if ((tls_mask & TLS_TPRELGD) != 0)
7742 r_type = R_PPC64_TPREL64;
7743 else
7744 {
7745 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7746 r_type = R_PPC64_NONE;
7747 }
7748 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7749 }
7750 }
7751 else
7752 {
7753 if ((tls_mask & TLS_LD) == 0)
7754 {
7755 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7756 r_type = R_PPC64_NONE;
7757 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7758 }
7759 }
7760 break;
7761
7762 case R_PPC64_TPREL64:
7763 if ((tls_mask & TLS_TPREL) == 0)
7764 {
7765 r_type = R_PPC64_NONE;
7766 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7767 }
7768 break;
7769 }
7770
7771 /* Handle other relocations that tweak non-addend part of insn. */
7772 insn = 0;
7773 switch (r_type)
7774 {
7775 default:
7776 break;
7777
7778 /* Branch taken prediction relocations. */
7779 case R_PPC64_ADDR14_BRTAKEN:
7780 case R_PPC64_REL14_BRTAKEN:
7781 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7782 /* Fall thru. */
7783
7784 /* Branch not taken prediction relocations. */
7785 case R_PPC64_ADDR14_BRNTAKEN:
7786 case R_PPC64_REL14_BRNTAKEN:
7787 insn |= bfd_get_32 (output_bfd,
7788 contents + rel->r_offset) & ~(0x01 << 21);
7789 if (is_power4)
7790 {
7791 /* Set 'a' bit. This is 0b00010 in BO field for branch
7792 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7793 for branch on CTR insns (BO == 1a00t or 1a01t). */
7794 if ((insn & (0x14 << 21)) == (0x04 << 21))
7795 insn |= 0x02 << 21;
7796 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7797 insn |= 0x08 << 21;
7798 else
7799 break;
7800 }
7801 else
7802 {
7803 from = (rel->r_offset
7804 + input_section->output_offset
7805 + input_section->output_section->vma);
7806
7807 /* Invert 'y' bit if not the default. */
7808 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7809 insn ^= 0x01 << 21;
7810 }
7811
7812 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7813 break;
7814
7815 case R_PPC64_REL24:
7816 /* Calls to functions with a different TOC, such as calls to
7817 shared objects, need to alter the TOC pointer. This is
7818 done using a linkage stub. A REL24 branching to these
7819 linkage stubs needs to be followed by a nop, as the nop
7820 will be replaced with an instruction to restore the TOC
7821 base pointer. */
7822 if (((h != NULL
7823 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7824 && fdh->plt.plist != NULL)
7825 || ((fdh = h, sec) != NULL
7826 && sec->output_section != NULL
7827 && (htab->stub_group[sec->id].toc_off
7828 != htab->stub_group[input_section->id].toc_off)))
7829 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7830 rel, htab)) != NULL
7831 && (stub_entry->stub_type == ppc_stub_plt_call
7832 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7833 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7834 {
7835 bfd_boolean can_plt_call = 0;
7836
7837 if (rel->r_offset + 8 <= input_section->_cooked_size)
7838 {
7839 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7840 if (insn == NOP
7841 || insn == CROR_151515 || insn == CROR_313131)
7842 {
7843 bfd_put_32 (input_bfd, LD_R2_40R1,
7844 contents + rel->r_offset + 4);
7845 can_plt_call = 1;
7846 }
7847 }
7848
7849 if (!can_plt_call)
7850 {
7851 if (stub_entry->stub_type == ppc_stub_plt_call)
7852 {
7853 /* If this is a plain branch rather than a branch
7854 and link, don't require a nop. */
7855 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7856 if ((insn & 1) == 0)
7857 can_plt_call = 1;
7858 }
7859 else if (h != NULL
7860 && strcmp (h->root.root.string,
7861 ".__libc_start_main") == 0)
7862 {
7863 /* Allow crt1 branch to go via a toc adjusting stub. */
7864 can_plt_call = 1;
7865 }
7866 else
7867 {
7868 if (strcmp (input_section->output_section->name,
7869 ".init") == 0
7870 || strcmp (input_section->output_section->name,
7871 ".fini") == 0)
7872 (*_bfd_error_handler)
7873 (_("%s(%s+0x%lx): automatic multiple TOCs "
7874 "not supported using your crt files; "
7875 "recompile with -mminimal-toc or upgrade gcc"),
7876 bfd_archive_filename (input_bfd),
7877 input_section->name,
7878 (long) rel->r_offset);
7879 else
7880 (*_bfd_error_handler)
7881 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7882 "does not allow automatic multiple TOCs; "
7883 "recompile with -mminimal-toc or "
7884 "-fno-optimize-sibling-calls, "
7885 "or make `%s' extern"),
7886 bfd_archive_filename (input_bfd),
7887 input_section->name,
7888 (long) rel->r_offset,
7889 sym_name,
7890 sym_name);
7891 bfd_set_error (bfd_error_bad_value);
7892 ret = FALSE;
7893 }
7894 }
7895
7896 if (can_plt_call)
7897 {
7898 relocation = (stub_entry->stub_offset
7899 + stub_entry->stub_sec->output_offset
7900 + stub_entry->stub_sec->output_section->vma);
7901 if (stub_entry->stub_type == ppc_stub_plt_call)
7902 unresolved_reloc = FALSE;
7903 }
7904 }
7905
7906 if (h != NULL
7907 && h->root.type == bfd_link_hash_undefweak
7908 && relocation == 0
7909 && rel->r_addend == 0)
7910 {
7911 /* Tweak calls to undefined weak functions to point at a
7912 blr. We can thus call a weak function without first
7913 checking whether the function is defined. We have a
7914 blr at the end of .sfpr. */
7915 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7916 relocation = (htab->sfpr->_raw_size - 4
7917 + htab->sfpr->output_offset
7918 + htab->sfpr->output_section->vma);
7919 from = (rel->r_offset
7920 + input_section->output_offset
7921 + input_section->output_section->vma);
7922
7923 /* But let's not be silly about it. If the blr isn't in
7924 reach, just go to the next instruction. */
7925 if (relocation - from + (1 << 25) >= (1 << 26)
7926 || htab->sfpr->_raw_size == 0)
7927 relocation = from + 4;
7928 }
7929 break;
7930 }
7931
7932 /* Set `addend'. */
7933 tls_type = 0;
7934 addend = rel->r_addend;
7935 switch (r_type)
7936 {
7937 default:
7938 (*_bfd_error_handler)
7939 (_("%s: unknown relocation type %d for symbol %s"),
7940 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
7941
7942 bfd_set_error (bfd_error_bad_value);
7943 ret = FALSE;
7944 continue;
7945
7946 case R_PPC64_NONE:
7947 case R_PPC64_TLS:
7948 case R_PPC64_GNU_VTINHERIT:
7949 case R_PPC64_GNU_VTENTRY:
7950 continue;
7951
7952 /* GOT16 relocations. Like an ADDR16 using the symbol's
7953 address in the GOT as relocation value instead of the
7954 symbol's value itself. Also, create a GOT entry for the
7955 symbol and put the symbol value there. */
7956 case R_PPC64_GOT_TLSGD16:
7957 case R_PPC64_GOT_TLSGD16_LO:
7958 case R_PPC64_GOT_TLSGD16_HI:
7959 case R_PPC64_GOT_TLSGD16_HA:
7960 tls_type = TLS_TLS | TLS_GD;
7961 goto dogot;
7962
7963 case R_PPC64_GOT_TLSLD16:
7964 case R_PPC64_GOT_TLSLD16_LO:
7965 case R_PPC64_GOT_TLSLD16_HI:
7966 case R_PPC64_GOT_TLSLD16_HA:
7967 tls_type = TLS_TLS | TLS_LD;
7968 goto dogot;
7969
7970 case R_PPC64_GOT_TPREL16_DS:
7971 case R_PPC64_GOT_TPREL16_LO_DS:
7972 case R_PPC64_GOT_TPREL16_HI:
7973 case R_PPC64_GOT_TPREL16_HA:
7974 tls_type = TLS_TLS | TLS_TPREL;
7975 goto dogot;
7976
7977 case R_PPC64_GOT_DTPREL16_DS:
7978 case R_PPC64_GOT_DTPREL16_LO_DS:
7979 case R_PPC64_GOT_DTPREL16_HI:
7980 case R_PPC64_GOT_DTPREL16_HA:
7981 tls_type = TLS_TLS | TLS_DTPREL;
7982 goto dogot;
7983
7984 case R_PPC64_GOT16:
7985 case R_PPC64_GOT16_LO:
7986 case R_PPC64_GOT16_HI:
7987 case R_PPC64_GOT16_HA:
7988 case R_PPC64_GOT16_DS:
7989 case R_PPC64_GOT16_LO_DS:
7990 dogot:
7991 {
7992 /* Relocation is to the entry for this symbol in the global
7993 offset table. */
7994 asection *got;
7995 bfd_vma *offp;
7996 bfd_vma off;
7997 unsigned long indx = 0;
7998
7999 if (tls_type == (TLS_TLS | TLS_LD)
8000 && (h == NULL
8001 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
8002 offp = &ppc64_tlsld_got (input_bfd)->offset;
8003 else
8004 {
8005 struct got_entry *ent;
8006
8007 if (h != NULL)
8008 {
8009 bfd_boolean dyn = htab->elf.dynamic_sections_created;
8010 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8011 || (info->shared
8012 && SYMBOL_REFERENCES_LOCAL (info, h)))
8013 /* This is actually a static link, or it is a
8014 -Bsymbolic link and the symbol is defined
8015 locally, or the symbol was forced to be local
8016 because of a version file. */
8017 ;
8018 else
8019 {
8020 indx = h->dynindx;
8021 unresolved_reloc = FALSE;
8022 }
8023 ent = h->got.glist;
8024 }
8025 else
8026 {
8027 if (local_got_ents == NULL)
8028 abort ();
8029 ent = local_got_ents[r_symndx];
8030 }
8031
8032 for (; ent != NULL; ent = ent->next)
8033 if (ent->addend == rel->r_addend
8034 && ent->owner == input_bfd
8035 && ent->tls_type == tls_type)
8036 break;
8037 if (ent == NULL)
8038 abort ();
8039 offp = &ent->got.offset;
8040 }
8041
8042 got = ppc64_elf_tdata (input_bfd)->got;
8043 if (got == NULL)
8044 abort ();
8045
8046 /* The offset must always be a multiple of 8. We use the
8047 least significant bit to record whether we have already
8048 processed this entry. */
8049 off = *offp;
8050 if ((off & 1) != 0)
8051 off &= ~1;
8052 else
8053 {
8054 /* Generate relocs for the dynamic linker, except in
8055 the case of TLSLD where we'll use one entry per
8056 module. */
8057 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
8058
8059 *offp = off | 1;
8060 if ((info->shared || indx != 0)
8061 && (h == NULL
8062 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8063 || h->root.type != bfd_link_hash_undefweak))
8064 {
8065 outrel.r_offset = (got->output_section->vma
8066 + got->output_offset
8067 + off);
8068 outrel.r_addend = rel->r_addend;
8069 if (tls_type & (TLS_LD | TLS_GD))
8070 {
8071 outrel.r_addend = 0;
8072 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8073 if (tls_type == (TLS_TLS | TLS_GD))
8074 {
8075 loc = relgot->contents;
8076 loc += (relgot->reloc_count++
8077 * sizeof (Elf64_External_Rela));
8078 bfd_elf64_swap_reloca_out (output_bfd,
8079 &outrel, loc);
8080 outrel.r_offset += 8;
8081 outrel.r_addend = rel->r_addend;
8082 outrel.r_info
8083 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8084 }
8085 }
8086 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8087 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8088 else if (tls_type == (TLS_TLS | TLS_TPREL))
8089 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8090 else if (indx == 0)
8091 {
8092 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8093
8094 /* Write the .got section contents for the sake
8095 of prelink. */
8096 loc = got->contents + off;
8097 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8098 loc);
8099 }
8100 else
8101 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8102
8103 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8104 {
8105 outrel.r_addend += relocation;
8106 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8107 outrel.r_addend -= htab->elf.tls_sec->vma;
8108 }
8109 loc = relgot->contents;
8110 loc += (relgot->reloc_count++
8111 * sizeof (Elf64_External_Rela));
8112 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8113 }
8114
8115 /* Init the .got section contents here if we're not
8116 emitting a reloc. */
8117 else
8118 {
8119 relocation += rel->r_addend;
8120 if (tls_type == (TLS_TLS | TLS_LD))
8121 relocation = 1;
8122 else if (tls_type != 0)
8123 {
8124 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
8125 if (tls_type == (TLS_TLS | TLS_TPREL))
8126 relocation += DTP_OFFSET - TP_OFFSET;
8127
8128 if (tls_type == (TLS_TLS | TLS_GD))
8129 {
8130 bfd_put_64 (output_bfd, relocation,
8131 got->contents + off + 8);
8132 relocation = 1;
8133 }
8134 }
8135
8136 bfd_put_64 (output_bfd, relocation,
8137 got->contents + off);
8138 }
8139 }
8140
8141 if (off >= (bfd_vma) -2)
8142 abort ();
8143
8144 relocation = got->output_offset + off;
8145
8146 /* TOC base (r2) is TOC start plus 0x8000. */
8147 addend = -TOC_BASE_OFF;
8148 }
8149 break;
8150
8151 case R_PPC64_PLT16_HA:
8152 case R_PPC64_PLT16_HI:
8153 case R_PPC64_PLT16_LO:
8154 case R_PPC64_PLT32:
8155 case R_PPC64_PLT64:
8156 /* Relocation is to the entry for this symbol in the
8157 procedure linkage table. */
8158
8159 /* Resolve a PLT reloc against a local symbol directly,
8160 without using the procedure linkage table. */
8161 if (h == NULL)
8162 break;
8163
8164 /* It's possible that we didn't make a PLT entry for this
8165 symbol. This happens when statically linking PIC code,
8166 or when using -Bsymbolic. Go find a match if there is a
8167 PLT entry. */
8168 if (htab->plt != NULL)
8169 {
8170 struct plt_entry *ent;
8171 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8172 if (ent->addend == rel->r_addend
8173 && ent->plt.offset != (bfd_vma) -1)
8174 {
8175 relocation = (htab->plt->output_section->vma
8176 + htab->plt->output_offset
8177 + ent->plt.offset);
8178 unresolved_reloc = FALSE;
8179 }
8180 }
8181 break;
8182
8183 case R_PPC64_TOC:
8184 /* Relocation value is TOC base. */
8185 relocation = TOCstart;
8186 if (r_symndx == 0)
8187 relocation += htab->stub_group[input_section->id].toc_off;
8188 else if (unresolved_reloc)
8189 ;
8190 else if (sec != NULL && sec->id <= htab->top_id)
8191 relocation += htab->stub_group[sec->id].toc_off;
8192 else
8193 unresolved_reloc = TRUE;
8194 goto dodyn2;
8195
8196 /* TOC16 relocs. We want the offset relative to the TOC base,
8197 which is the address of the start of the TOC plus 0x8000.
8198 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8199 in this order. */
8200 case R_PPC64_TOC16:
8201 case R_PPC64_TOC16_LO:
8202 case R_PPC64_TOC16_HI:
8203 case R_PPC64_TOC16_DS:
8204 case R_PPC64_TOC16_LO_DS:
8205 case R_PPC64_TOC16_HA:
8206 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8207 break;
8208
8209 /* Relocate against the beginning of the section. */
8210 case R_PPC64_SECTOFF:
8211 case R_PPC64_SECTOFF_LO:
8212 case R_PPC64_SECTOFF_HI:
8213 case R_PPC64_SECTOFF_DS:
8214 case R_PPC64_SECTOFF_LO_DS:
8215 case R_PPC64_SECTOFF_HA:
8216 if (sec != NULL)
8217 addend -= sec->output_section->vma;
8218 break;
8219
8220 case R_PPC64_REL14:
8221 case R_PPC64_REL14_BRNTAKEN:
8222 case R_PPC64_REL14_BRTAKEN:
8223 case R_PPC64_REL24:
8224 break;
8225
8226 case R_PPC64_TPREL16:
8227 case R_PPC64_TPREL16_LO:
8228 case R_PPC64_TPREL16_HI:
8229 case R_PPC64_TPREL16_HA:
8230 case R_PPC64_TPREL16_DS:
8231 case R_PPC64_TPREL16_LO_DS:
8232 case R_PPC64_TPREL16_HIGHER:
8233 case R_PPC64_TPREL16_HIGHERA:
8234 case R_PPC64_TPREL16_HIGHEST:
8235 case R_PPC64_TPREL16_HIGHESTA:
8236 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8237 if (info->shared)
8238 /* The TPREL16 relocs shouldn't really be used in shared
8239 libs as they will result in DT_TEXTREL being set, but
8240 support them anyway. */
8241 goto dodyn;
8242 break;
8243
8244 case R_PPC64_DTPREL16:
8245 case R_PPC64_DTPREL16_LO:
8246 case R_PPC64_DTPREL16_HI:
8247 case R_PPC64_DTPREL16_HA:
8248 case R_PPC64_DTPREL16_DS:
8249 case R_PPC64_DTPREL16_LO_DS:
8250 case R_PPC64_DTPREL16_HIGHER:
8251 case R_PPC64_DTPREL16_HIGHERA:
8252 case R_PPC64_DTPREL16_HIGHEST:
8253 case R_PPC64_DTPREL16_HIGHESTA:
8254 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8255 break;
8256
8257 case R_PPC64_DTPMOD64:
8258 relocation = 1;
8259 addend = 0;
8260 goto dodyn;
8261
8262 case R_PPC64_TPREL64:
8263 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8264 goto dodyn;
8265
8266 case R_PPC64_DTPREL64:
8267 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8268 /* Fall thru */
8269
8270 /* Relocations that may need to be propagated if this is a
8271 dynamic object. */
8272 case R_PPC64_REL30:
8273 case R_PPC64_REL32:
8274 case R_PPC64_REL64:
8275 case R_PPC64_ADDR14:
8276 case R_PPC64_ADDR14_BRNTAKEN:
8277 case R_PPC64_ADDR14_BRTAKEN:
8278 case R_PPC64_ADDR16:
8279 case R_PPC64_ADDR16_DS:
8280 case R_PPC64_ADDR16_HA:
8281 case R_PPC64_ADDR16_HI:
8282 case R_PPC64_ADDR16_HIGHER:
8283 case R_PPC64_ADDR16_HIGHERA:
8284 case R_PPC64_ADDR16_HIGHEST:
8285 case R_PPC64_ADDR16_HIGHESTA:
8286 case R_PPC64_ADDR16_LO:
8287 case R_PPC64_ADDR16_LO_DS:
8288 case R_PPC64_ADDR24:
8289 case R_PPC64_ADDR32:
8290 case R_PPC64_ADDR64:
8291 case R_PPC64_UADDR16:
8292 case R_PPC64_UADDR32:
8293 case R_PPC64_UADDR64:
8294 /* r_symndx will be zero only for relocs against symbols
8295 from removed linkonce sections, or sections discarded by
8296 a linker script. */
8297 dodyn:
8298 if (r_symndx == 0)
8299 break;
8300 /* Fall thru. */
8301
8302 dodyn2:
8303 if ((input_section->flags & SEC_ALLOC) == 0)
8304 break;
8305
8306 if (NO_OPD_RELOCS && is_opd)
8307 break;
8308
8309 if ((info->shared
8310 && (h == NULL
8311 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8312 || h->root.type != bfd_link_hash_undefweak)
8313 && (MUST_BE_DYN_RELOC (r_type)
8314 || !SYMBOL_CALLS_LOCAL (info, h)))
8315 || (ELIMINATE_COPY_RELOCS
8316 && !info->shared
8317 && h != NULL
8318 && h->dynindx != -1
8319 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8320 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8321 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8322 {
8323 Elf_Internal_Rela outrel;
8324 bfd_boolean skip, relocate;
8325 asection *sreloc;
8326 bfd_byte *loc;
8327 bfd_vma out_off;
8328
8329 /* When generating a dynamic object, these relocations
8330 are copied into the output file to be resolved at run
8331 time. */
8332
8333 skip = FALSE;
8334 relocate = FALSE;
8335
8336 out_off = _bfd_elf_section_offset (output_bfd, info,
8337 input_section, rel->r_offset);
8338 if (out_off == (bfd_vma) -1)
8339 skip = TRUE;
8340 else if (out_off == (bfd_vma) -2)
8341 skip = TRUE, relocate = TRUE;
8342 out_off += (input_section->output_section->vma
8343 + input_section->output_offset);
8344 outrel.r_offset = out_off;
8345 outrel.r_addend = rel->r_addend;
8346
8347 /* Optimize unaligned reloc use. */
8348 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8349 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8350 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8351 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8352 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8353 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8354 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8355 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8356 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8357
8358 if (skip)
8359 memset (&outrel, 0, sizeof outrel);
8360 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8361 && !is_opd
8362 && r_type != R_PPC64_TOC)
8363 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8364 else
8365 {
8366 /* This symbol is local, or marked to become local,
8367 or this is an opd section reloc which must point
8368 at a local function. */
8369 outrel.r_addend += relocation;
8370 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8371 {
8372 if (is_opd && h != NULL)
8373 {
8374 /* Lie about opd entries. This case occurs
8375 when building shared libraries and we
8376 reference a function in another shared
8377 lib. The same thing happens for a weak
8378 definition in an application that's
8379 overridden by a strong definition in a
8380 shared lib. (I believe this is a generic
8381 bug in binutils handling of weak syms.)
8382 In these cases we won't use the opd
8383 entry in this lib. */
8384 unresolved_reloc = FALSE;
8385 }
8386 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8387
8388 /* We need to relocate .opd contents for ld.so.
8389 Prelink also wants simple and consistent rules
8390 for relocs. This make all RELATIVE relocs have
8391 *r_offset equal to r_addend. */
8392 relocate = TRUE;
8393 }
8394 else
8395 {
8396 long indx = 0;
8397
8398 if (bfd_is_abs_section (sec))
8399 ;
8400 else if (sec == NULL || sec->owner == NULL)
8401 {
8402 bfd_set_error (bfd_error_bad_value);
8403 return FALSE;
8404 }
8405 else
8406 {
8407 asection *osec;
8408
8409 osec = sec->output_section;
8410 indx = elf_section_data (osec)->dynindx;
8411
8412 /* We are turning this relocation into one
8413 against a section symbol, so subtract out
8414 the output section's address but not the
8415 offset of the input section in the output
8416 section. */
8417 outrel.r_addend -= osec->vma;
8418 }
8419
8420 outrel.r_info = ELF64_R_INFO (indx, r_type);
8421 }
8422 }
8423
8424 sreloc = elf_section_data (input_section)->sreloc;
8425 if (sreloc == NULL)
8426 abort ();
8427
8428 loc = sreloc->contents;
8429 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8430 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8431
8432 /* If this reloc is against an external symbol, it will
8433 be computed at runtime, so there's no need to do
8434 anything now. However, for the sake of prelink ensure
8435 that the section contents are a known value. */
8436 if (! relocate)
8437 {
8438 unresolved_reloc = FALSE;
8439 /* The value chosen here is quite arbitrary as ld.so
8440 ignores section contents except for the special
8441 case of .opd where the contents might be accessed
8442 before relocation. Choose zero, as that won't
8443 cause reloc overflow. */
8444 relocation = 0;
8445 addend = 0;
8446 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8447 to improve backward compatibility with older
8448 versions of ld. */
8449 if (r_type == R_PPC64_ADDR64)
8450 addend = outrel.r_addend;
8451 /* Adjust pc_relative relocs to have zero in *r_offset. */
8452 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8453 addend = (input_section->output_section->vma
8454 + input_section->output_offset
8455 + rel->r_offset);
8456 }
8457 }
8458 break;
8459
8460 case R_PPC64_COPY:
8461 case R_PPC64_GLOB_DAT:
8462 case R_PPC64_JMP_SLOT:
8463 case R_PPC64_RELATIVE:
8464 /* We shouldn't ever see these dynamic relocs in relocatable
8465 files. */
8466 /* Fall through. */
8467
8468 case R_PPC64_PLTGOT16:
8469 case R_PPC64_PLTGOT16_DS:
8470 case R_PPC64_PLTGOT16_HA:
8471 case R_PPC64_PLTGOT16_HI:
8472 case R_PPC64_PLTGOT16_LO:
8473 case R_PPC64_PLTGOT16_LO_DS:
8474 case R_PPC64_PLTREL32:
8475 case R_PPC64_PLTREL64:
8476 /* These ones haven't been implemented yet. */
8477
8478 (*_bfd_error_handler)
8479 (_("%s: relocation %s is not supported for symbol %s."),
8480 bfd_archive_filename (input_bfd),
8481 ppc64_elf_howto_table[r_type]->name, sym_name);
8482
8483 bfd_set_error (bfd_error_invalid_operation);
8484 ret = FALSE;
8485 continue;
8486 }
8487
8488 /* Do any further special processing. */
8489 switch (r_type)
8490 {
8491 default:
8492 break;
8493
8494 case R_PPC64_ADDR16_HA:
8495 case R_PPC64_ADDR16_HIGHERA:
8496 case R_PPC64_ADDR16_HIGHESTA:
8497 case R_PPC64_GOT16_HA:
8498 case R_PPC64_PLTGOT16_HA:
8499 case R_PPC64_PLT16_HA:
8500 case R_PPC64_TOC16_HA:
8501 case R_PPC64_SECTOFF_HA:
8502 case R_PPC64_TPREL16_HA:
8503 case R_PPC64_DTPREL16_HA:
8504 case R_PPC64_GOT_TLSGD16_HA:
8505 case R_PPC64_GOT_TLSLD16_HA:
8506 case R_PPC64_GOT_TPREL16_HA:
8507 case R_PPC64_GOT_DTPREL16_HA:
8508 case R_PPC64_TPREL16_HIGHER:
8509 case R_PPC64_TPREL16_HIGHERA:
8510 case R_PPC64_TPREL16_HIGHEST:
8511 case R_PPC64_TPREL16_HIGHESTA:
8512 case R_PPC64_DTPREL16_HIGHER:
8513 case R_PPC64_DTPREL16_HIGHERA:
8514 case R_PPC64_DTPREL16_HIGHEST:
8515 case R_PPC64_DTPREL16_HIGHESTA:
8516 /* It's just possible that this symbol is a weak symbol
8517 that's not actually defined anywhere. In that case,
8518 'sec' would be NULL, and we should leave the symbol
8519 alone (it will be set to zero elsewhere in the link). */
8520 if (sec != NULL)
8521 /* Add 0x10000 if sign bit in 0:15 is set.
8522 Bits 0:15 are not used. */
8523 addend += 0x8000;
8524 break;
8525
8526 case R_PPC64_ADDR16_DS:
8527 case R_PPC64_ADDR16_LO_DS:
8528 case R_PPC64_GOT16_DS:
8529 case R_PPC64_GOT16_LO_DS:
8530 case R_PPC64_PLT16_LO_DS:
8531 case R_PPC64_SECTOFF_DS:
8532 case R_PPC64_SECTOFF_LO_DS:
8533 case R_PPC64_TOC16_DS:
8534 case R_PPC64_TOC16_LO_DS:
8535 case R_PPC64_PLTGOT16_DS:
8536 case R_PPC64_PLTGOT16_LO_DS:
8537 case R_PPC64_GOT_TPREL16_DS:
8538 case R_PPC64_GOT_TPREL16_LO_DS:
8539 case R_PPC64_GOT_DTPREL16_DS:
8540 case R_PPC64_GOT_DTPREL16_LO_DS:
8541 case R_PPC64_TPREL16_DS:
8542 case R_PPC64_TPREL16_LO_DS:
8543 case R_PPC64_DTPREL16_DS:
8544 case R_PPC64_DTPREL16_LO_DS:
8545 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8546 mask = 3;
8547 /* If this reloc is against an lq insn, then the value must be
8548 a multiple of 16. This is somewhat of a hack, but the
8549 "correct" way to do this by defining _DQ forms of all the
8550 _DS relocs bloats all reloc switches in this file. It
8551 doesn't seem to make much sense to use any of these relocs
8552 in data, so testing the insn should be safe. */
8553 if ((insn & (0x3f << 26)) == (56u << 26))
8554 mask = 15;
8555 if (((relocation + addend) & mask) != 0)
8556 {
8557 (*_bfd_error_handler)
8558 (_("%s: error: relocation %s not a multiple of %d"),
8559 bfd_archive_filename (input_bfd),
8560 ppc64_elf_howto_table[r_type]->name,
8561 mask + 1);
8562 bfd_set_error (bfd_error_bad_value);
8563 ret = FALSE;
8564 continue;
8565 }
8566 break;
8567
8568 case R_PPC64_REL14:
8569 case R_PPC64_REL14_BRNTAKEN:
8570 case R_PPC64_REL14_BRTAKEN:
8571 max_br_offset = 1 << 15;
8572 goto branch_check;
8573
8574 case R_PPC64_REL24:
8575 max_br_offset = 1 << 25;
8576
8577 branch_check:
8578 /* If the branch is out of reach or the TOC register needs
8579 adjusting, then redirect the call to the local stub for
8580 this function. */
8581 from = (rel->r_offset
8582 + input_section->output_offset
8583 + input_section->output_section->vma);
8584 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8585 || (sec != NULL
8586 && sec->output_section != NULL
8587 && sec->id <= htab->top_id
8588 && (htab->stub_group[sec->id].toc_off
8589 != htab->stub_group[input_section->id].toc_off)))
8590 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8591 rel, htab)) != NULL)
8592 {
8593 /* Munge up the value and addend so that we call the stub
8594 rather than the procedure directly. */
8595 relocation = (stub_entry->stub_offset
8596 + stub_entry->stub_sec->output_offset
8597 + stub_entry->stub_sec->output_section->vma);
8598 addend = 0;
8599 }
8600 break;
8601 }
8602
8603 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8604 because such sections are not SEC_ALLOC and thus ld.so will
8605 not process them. */
8606 if (unresolved_reloc
8607 && !((input_section->flags & SEC_DEBUGGING) != 0
8608 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8609 {
8610 (*_bfd_error_handler)
8611 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8612 bfd_archive_filename (input_bfd),
8613 bfd_get_section_name (input_bfd, input_section),
8614 (long) rel->r_offset,
8615 ppc64_elf_howto_table[(int) r_type]->name,
8616 h->root.root.string);
8617 ret = FALSE;
8618 }
8619
8620 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8621 input_bfd,
8622 input_section,
8623 contents,
8624 rel->r_offset,
8625 relocation,
8626 addend);
8627
8628 if (r != bfd_reloc_ok)
8629 {
8630 if (sym_name == NULL)
8631 sym_name = "(null)";
8632 if (r == bfd_reloc_overflow)
8633 {
8634 if (warned)
8635 continue;
8636 if (h != NULL
8637 && h->root.type == bfd_link_hash_undefweak
8638 && ppc64_elf_howto_table[r_type]->pc_relative)
8639 {
8640 /* Assume this is a call protected by other code that
8641 detects the symbol is undefined. If this is the case,
8642 we can safely ignore the overflow. If not, the
8643 program is hosed anyway, and a little warning isn't
8644 going to help. */
8645
8646 continue;
8647 }
8648
8649 if (!((*info->callbacks->reloc_overflow)
8650 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8651 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8652 return FALSE;
8653 }
8654 else
8655 {
8656 (*_bfd_error_handler)
8657 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8658 bfd_archive_filename (input_bfd),
8659 bfd_get_section_name (input_bfd, input_section),
8660 (long) rel->r_offset,
8661 ppc64_elf_howto_table[r_type]->name,
8662 sym_name,
8663 (int) r);
8664 ret = FALSE;
8665 }
8666 }
8667 }
8668
8669 return ret;
8670 }
8671
8672 /* Finish up dynamic symbol handling. We set the contents of various
8673 dynamic sections here. */
8674
8675 static bfd_boolean
8676 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8677 struct bfd_link_info *info,
8678 struct elf_link_hash_entry *h,
8679 Elf_Internal_Sym *sym)
8680 {
8681 struct ppc_link_hash_table *htab;
8682 bfd *dynobj;
8683
8684 htab = ppc_hash_table (info);
8685 dynobj = htab->elf.dynobj;
8686
8687 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8688 {
8689 struct plt_entry *ent;
8690 Elf_Internal_Rela rela;
8691 bfd_byte *loc;
8692
8693 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8694 if (ent->plt.offset != (bfd_vma) -1)
8695 {
8696 /* This symbol has an entry in the procedure linkage
8697 table. Set it up. */
8698
8699 if (htab->plt == NULL
8700 || htab->relplt == NULL
8701 || htab->glink == NULL)
8702 abort ();
8703
8704 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8705 fill in the PLT entry. */
8706 rela.r_offset = (htab->plt->output_section->vma
8707 + htab->plt->output_offset
8708 + ent->plt.offset);
8709 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8710 rela.r_addend = ent->addend;
8711
8712 loc = htab->relplt->contents;
8713 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8714 * sizeof (Elf64_External_Rela));
8715 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8716 }
8717 }
8718
8719 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8720 {
8721 Elf_Internal_Rela rela;
8722 bfd_byte *loc;
8723
8724 /* This symbol needs a copy reloc. Set it up. */
8725
8726 if (h->dynindx == -1
8727 || (h->root.type != bfd_link_hash_defined
8728 && h->root.type != bfd_link_hash_defweak)
8729 || htab->relbss == NULL)
8730 abort ();
8731
8732 rela.r_offset = (h->root.u.def.value
8733 + h->root.u.def.section->output_section->vma
8734 + h->root.u.def.section->output_offset);
8735 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8736 rela.r_addend = 0;
8737 loc = htab->relbss->contents;
8738 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8739 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8740 }
8741
8742 /* Mark some specially defined symbols as absolute. */
8743 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8744 sym->st_shndx = SHN_ABS;
8745
8746 return TRUE;
8747 }
8748
8749 /* Used to decide how to sort relocs in an optimal manner for the
8750 dynamic linker, before writing them out. */
8751
8752 static enum elf_reloc_type_class
8753 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8754 {
8755 enum elf_ppc64_reloc_type r_type;
8756
8757 r_type = ELF64_R_TYPE (rela->r_info);
8758 switch (r_type)
8759 {
8760 case R_PPC64_RELATIVE:
8761 return reloc_class_relative;
8762 case R_PPC64_JMP_SLOT:
8763 return reloc_class_plt;
8764 case R_PPC64_COPY:
8765 return reloc_class_copy;
8766 default:
8767 return reloc_class_normal;
8768 }
8769 }
8770
8771 /* Finish up the dynamic sections. */
8772
8773 static bfd_boolean
8774 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8775 struct bfd_link_info *info)
8776 {
8777 struct ppc_link_hash_table *htab;
8778 bfd *dynobj;
8779 asection *sdyn;
8780
8781 htab = ppc_hash_table (info);
8782 dynobj = htab->elf.dynobj;
8783 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8784
8785 if (htab->elf.dynamic_sections_created)
8786 {
8787 Elf64_External_Dyn *dyncon, *dynconend;
8788
8789 if (sdyn == NULL || htab->got == NULL)
8790 abort ();
8791
8792 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8793 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8794 for (; dyncon < dynconend; dyncon++)
8795 {
8796 Elf_Internal_Dyn dyn;
8797 asection *s;
8798
8799 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8800
8801 switch (dyn.d_tag)
8802 {
8803 default:
8804 continue;
8805
8806 case DT_PPC64_GLINK:
8807 s = htab->glink;
8808 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8809 /* We stupidly defined DT_PPC64_GLINK to be the start
8810 of glink rather than the first entry point, which is
8811 what ld.so needs, and now have a bigger stub to
8812 support automatic multiple TOCs. */
8813 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8814 break;
8815
8816 case DT_PPC64_OPD:
8817 s = bfd_get_section_by_name (output_bfd, ".opd");
8818 if (s == NULL)
8819 continue;
8820 dyn.d_un.d_ptr = s->vma;
8821 break;
8822
8823 case DT_PPC64_OPDSZ:
8824 s = bfd_get_section_by_name (output_bfd, ".opd");
8825 if (s == NULL)
8826 continue;
8827 dyn.d_un.d_val = s->_raw_size;
8828 break;
8829
8830 case DT_PLTGOT:
8831 s = htab->plt;
8832 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8833 break;
8834
8835 case DT_JMPREL:
8836 s = htab->relplt;
8837 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8838 break;
8839
8840 case DT_PLTRELSZ:
8841 dyn.d_un.d_val = htab->relplt->_raw_size;
8842 break;
8843
8844 case DT_RELASZ:
8845 /* Don't count procedure linkage table relocs in the
8846 overall reloc count. */
8847 s = htab->relplt;
8848 if (s == NULL)
8849 continue;
8850 dyn.d_un.d_val -= s->_raw_size;
8851 break;
8852
8853 case DT_RELA:
8854 /* We may not be using the standard ELF linker script.
8855 If .rela.plt is the first .rela section, we adjust
8856 DT_RELA to not include it. */
8857 s = htab->relplt;
8858 if (s == NULL)
8859 continue;
8860 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8861 continue;
8862 dyn.d_un.d_ptr += s->_raw_size;
8863 break;
8864 }
8865
8866 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8867 }
8868 }
8869
8870 if (htab->got != NULL && htab->got->_raw_size != 0)
8871 {
8872 /* Fill in the first entry in the global offset table.
8873 We use it to hold the link-time TOCbase. */
8874 bfd_put_64 (output_bfd,
8875 elf_gp (output_bfd) + TOC_BASE_OFF,
8876 htab->got->contents);
8877
8878 /* Set .got entry size. */
8879 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8880 }
8881
8882 if (htab->plt != NULL && htab->plt->_raw_size != 0)
8883 {
8884 /* Set .plt entry size. */
8885 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8886 = PLT_ENTRY_SIZE;
8887 }
8888
8889 /* We need to handle writing out multiple GOT sections ourselves,
8890 since we didn't add them to DYNOBJ. */
8891 while ((dynobj = dynobj->link_next) != NULL)
8892 {
8893 asection *s;
8894 s = ppc64_elf_tdata (dynobj)->got;
8895 if (s != NULL
8896 && s->_raw_size != 0
8897 && s->output_section != bfd_abs_section_ptr
8898 && !bfd_set_section_contents (output_bfd, s->output_section,
8899 s->contents, s->output_offset,
8900 s->_raw_size))
8901 return FALSE;
8902 s = ppc64_elf_tdata (dynobj)->relgot;
8903 if (s != NULL
8904 && s->_raw_size != 0
8905 && s->output_section != bfd_abs_section_ptr
8906 && !bfd_set_section_contents (output_bfd, s->output_section,
8907 s->contents, s->output_offset,
8908 s->_raw_size))
8909 return FALSE;
8910 }
8911
8912 return TRUE;
8913 }
8914
8915 #include "elf64-target.h"
GDB Binutils - Deliverables
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