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* elf64-ppc.c (get_tls_mask): Add toc_symndx param, save toc
[binutils.git] / bfd / elf64-ppc.c
blob564a6163997a6b933cbd364813f4f4bcf6ddf171
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
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22 /* The 64-bit PowerPC ELF ABI may be found at
23 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
24 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
25
26 #include "bfd.h"
27 #include "sysdep.h"
28 #include "bfdlink.h"
29 #include "libbfd.h"
30 #include "elf-bfd.h"
31 #include "elf/ppc64.h"
32 #include "elf64-ppc.h"
33
34 static bfd_reloc_status_type ppc64_elf_ha_reloc
35 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
36 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_toc_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc64_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50
51
52 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
53 #define TARGET_LITTLE_NAME "elf64-powerpcle"
54 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
55 #define TARGET_BIG_NAME "elf64-powerpc"
56 #define ELF_ARCH bfd_arch_powerpc
57 #define ELF_MACHINE_CODE EM_PPC64
58 #define ELF_MAXPAGESIZE 0x10000
59 #define elf_info_to_howto ppc64_elf_info_to_howto
60
61 #define elf_backend_want_got_sym 0
62 #define elf_backend_want_plt_sym 0
63 #define elf_backend_plt_alignment 3
64 #define elf_backend_plt_not_loaded 1
65 #define elf_backend_got_symbol_offset 0
66 #define elf_backend_got_header_size 8
67 #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
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_create_dynamic_sections ppc64_elf_create_dynamic_sections
81 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
82 #define elf_backend_check_relocs ppc64_elf_check_relocs
83 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
84 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
85 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
86 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
87 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
88 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
89 #define elf_backend_relocate_section ppc64_elf_relocate_section
90 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
91 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
92 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
93 #define elf_backend_special_sections ppc64_elf_special_sections
94
95 /* The name of the dynamic interpreter. This is put in the .interp
96 section. */
97 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
98
99 /* The size in bytes of an entry in the procedure linkage table. */
100 #define PLT_ENTRY_SIZE 24
101
102 /* The initial size of the plt reserved for the dynamic linker. */
103 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
104
105 /* TOC base pointers offset from start of TOC. */
106 #define TOC_BASE_OFF 0x8000
107
108 /* Offset of tp and dtp pointers from start of TLS block. */
109 #define TP_OFFSET 0x7000
110 #define DTP_OFFSET 0x8000
111
112 /* .plt call stub instructions. The normal stub is like this, but
113 sometimes the .plt entry crosses a 64k boundary and we need to
114 insert an addis to adjust r12. */
115 #define PLT_CALL_STUB_SIZE (7*4)
116 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
117 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
118 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
119 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
120 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
121 /* ld %r11,xxx+16@l(%r12) */
122 #define BCTR 0x4e800420 /* bctr */
123
124
125 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
126 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
127
128 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
129
130 /* glink call stub instructions. We enter with the index in R0, and the
131 address of glink entry in CTR. From that, we can calculate PLT0. */
132 #define GLINK_CALL_STUB_SIZE (16*4)
133 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
134 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
135 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
136 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
137 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
138 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
139 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
140 /* sub %r12,%r12,%r11 */
141 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
142 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
143 /* ld %r11,xxx@l(%r12) */
144 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
145 /* ld %r2,8(%r12) */
146 /* mtctr %r11 */
147 /* ld %r11,16(%r12) */
148 /* bctr */
149
150 /* Pad with this. */
151 #define NOP 0x60000000
152
153 /* Some other nops. */
154 #define CROR_151515 0x4def7b82
155 #define CROR_313131 0x4ffffb82
156
157 /* .glink entries for the first 32k functions are two instructions. */
158 #define LI_R0_0 0x38000000 /* li %r0,0 */
159 #define B_DOT 0x48000000 /* b . */
160
161 /* After that, we need two instructions to load the index, followed by
162 a branch. */
163 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
164 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
165
166 /* Instructions to save and restore floating point regs. */
167 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
168 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
169 #define BLR 0x4e800020 /* blr */
170
171 /* Since .opd is an array of descriptors and each entry will end up
172 with identical R_PPC64_RELATIVE relocs, there is really no need to
173 propagate .opd relocs; The dynamic linker should be taught to
174 relocate .opd without reloc entries. */
175 #ifndef NO_OPD_RELOCS
176 #define NO_OPD_RELOCS 0
177 #endif
178 \f
179 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
180
181 /* Relocation HOWTO's. */
182 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
183
184 static reloc_howto_type ppc64_elf_howto_raw[] = {
185 /* This reloc does nothing. */
186 HOWTO (R_PPC64_NONE, /* type */
187 0, /* rightshift */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
189 32, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_dont, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_PPC64_NONE", /* name */
195 FALSE, /* partial_inplace */
196 0, /* src_mask */
197 0, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* A standard 32 bit relocation. */
201 HOWTO (R_PPC64_ADDR32, /* type */
202 0, /* rightshift */
203 2, /* size (0 = byte, 1 = short, 2 = long) */
204 32, /* bitsize */
205 FALSE, /* pc_relative */
206 0, /* bitpos */
207 complain_overflow_bitfield, /* complain_on_overflow */
208 bfd_elf_generic_reloc, /* special_function */
209 "R_PPC64_ADDR32", /* name */
210 FALSE, /* partial_inplace */
211 0, /* src_mask */
212 0xffffffff, /* dst_mask */
213 FALSE), /* pcrel_offset */
214
215 /* An absolute 26 bit branch; the lower two bits must be zero.
216 FIXME: we don't check that, we just clear them. */
217 HOWTO (R_PPC64_ADDR24, /* type */
218 0, /* rightshift */
219 2, /* size (0 = byte, 1 = short, 2 = long) */
220 26, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_bitfield, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC64_ADDR24", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0x03fffffc, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A standard 16 bit relocation. */
232 HOWTO (R_PPC64_ADDR16, /* type */
233 0, /* rightshift */
234 1, /* size (0 = byte, 1 = short, 2 = long) */
235 16, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_bitfield, /* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC64_ADDR16", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* A 16 bit relocation without overflow. */
247 HOWTO (R_PPC64_ADDR16_LO, /* type */
248 0, /* rightshift */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
250 16, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont,/* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC64_ADDR16_LO", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* Bits 16-31 of an address. */
262 HOWTO (R_PPC64_ADDR16_HI, /* type */
263 16, /* rightshift */
264 1, /* size (0 = byte, 1 = short, 2 = long) */
265 16, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 bfd_elf_generic_reloc, /* special_function */
270 "R_PPC64_ADDR16_HI", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0xffff, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
277 bits, treated as a signed number, is negative. */
278 HOWTO (R_PPC64_ADDR16_HA, /* type */
279 16, /* rightshift */
280 1, /* size (0 = byte, 1 = short, 2 = long) */
281 16, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_dont, /* complain_on_overflow */
285 ppc64_elf_ha_reloc, /* special_function */
286 "R_PPC64_ADDR16_HA", /* name */
287 FALSE, /* partial_inplace */
288 0, /* src_mask */
289 0xffff, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* An absolute 16 bit branch; the lower two bits must be zero.
293 FIXME: we don't check that, we just clear them. */
294 HOWTO (R_PPC64_ADDR14, /* type */
295 0, /* rightshift */
296 2, /* size (0 = byte, 1 = short, 2 = long) */
297 16, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_bitfield, /* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_PPC64_ADDR14", /* name */
303 FALSE, /* partial_inplace */
304 0, /* src_mask */
305 0x0000fffc, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 /* An absolute 16 bit branch, for which bit 10 should be set to
309 indicate that the branch is expected to be taken. The lower two
310 bits must be zero. */
311 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
312 0, /* rightshift */
313 2, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_bitfield, /* complain_on_overflow */
318 ppc64_elf_brtaken_reloc, /* special_function */
319 "R_PPC64_ADDR14_BRTAKEN",/* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0x0000fffc, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch, for which bit 10 should be set to
326 indicate that the branch is not expected to be taken. The lower
327 two bits must be zero. */
328 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 16, /* bitsize */
332 FALSE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_bitfield, /* complain_on_overflow */
335 ppc64_elf_brtaken_reloc, /* special_function */
336 "R_PPC64_ADDR14_BRNTAKEN",/* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x0000fffc, /* dst_mask */
340 FALSE), /* pcrel_offset */
341
342 /* A relative 26 bit branch; the lower two bits must be zero. */
343 HOWTO (R_PPC64_REL24, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 26, /* bitsize */
347 TRUE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_signed, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_PPC64_REL24", /* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0x03fffffc, /* dst_mask */
355 TRUE), /* pcrel_offset */
356
357 /* A relative 16 bit branch; the lower two bits must be zero. */
358 HOWTO (R_PPC64_REL14, /* type */
359 0, /* rightshift */
360 2, /* size (0 = byte, 1 = short, 2 = long) */
361 16, /* bitsize */
362 TRUE, /* pc_relative */
363 0, /* bitpos */
364 complain_overflow_signed, /* complain_on_overflow */
365 bfd_elf_generic_reloc, /* special_function */
366 "R_PPC64_REL14", /* name */
367 FALSE, /* partial_inplace */
368 0, /* src_mask */
369 0x0000fffc, /* dst_mask */
370 TRUE), /* pcrel_offset */
371
372 /* A relative 16 bit branch. Bit 10 should be set to indicate that
373 the branch is expected to be taken. The lower two bits must be
374 zero. */
375 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 16, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_signed, /* complain_on_overflow */
382 ppc64_elf_brtaken_reloc, /* special_function */
383 "R_PPC64_REL14_BRTAKEN", /* name */
384 FALSE, /* partial_inplace */
385 0, /* src_mask */
386 0x0000fffc, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 /* A relative 16 bit branch. Bit 10 should be set to indicate that
390 the branch is not expected to be taken. The lower two bits must
391 be zero. */
392 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
393 0, /* rightshift */
394 2, /* size (0 = byte, 1 = short, 2 = long) */
395 16, /* bitsize */
396 TRUE, /* pc_relative */
397 0, /* bitpos */
398 complain_overflow_signed, /* complain_on_overflow */
399 ppc64_elf_brtaken_reloc, /* special_function */
400 "R_PPC64_REL14_BRNTAKEN",/* name */
401 FALSE, /* partial_inplace */
402 0, /* src_mask */
403 0x0000fffc, /* dst_mask */
404 TRUE), /* pcrel_offset */
405
406 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
407 symbol. */
408 HOWTO (R_PPC64_GOT16, /* type */
409 0, /* rightshift */
410 1, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 FALSE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_unhandled_reloc, /* special_function */
416 "R_PPC64_GOT16", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0xffff, /* dst_mask */
420 FALSE), /* pcrel_offset */
421
422 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
423 the symbol. */
424 HOWTO (R_PPC64_GOT16_LO, /* type */
425 0, /* rightshift */
426 1, /* size (0 = byte, 1 = short, 2 = long) */
427 16, /* bitsize */
428 FALSE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_dont, /* complain_on_overflow */
431 ppc64_elf_unhandled_reloc, /* special_function */
432 "R_PPC64_GOT16_LO", /* name */
433 FALSE, /* partial_inplace */
434 0, /* src_mask */
435 0xffff, /* dst_mask */
436 FALSE), /* pcrel_offset */
437
438 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
439 the symbol. */
440 HOWTO (R_PPC64_GOT16_HI, /* type */
441 16, /* rightshift */
442 1, /* size (0 = byte, 1 = short, 2 = long) */
443 16, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_dont,/* complain_on_overflow */
447 ppc64_elf_unhandled_reloc, /* special_function */
448 "R_PPC64_GOT16_HI", /* name */
449 FALSE, /* partial_inplace */
450 0, /* src_mask */
451 0xffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
455 the symbol. */
456 HOWTO (R_PPC64_GOT16_HA, /* type */
457 16, /* rightshift */
458 1, /* size (0 = byte, 1 = short, 2 = long) */
459 16, /* bitsize */
460 FALSE, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_dont,/* complain_on_overflow */
463 ppc64_elf_unhandled_reloc, /* special_function */
464 "R_PPC64_GOT16_HA", /* name */
465 FALSE, /* partial_inplace */
466 0, /* src_mask */
467 0xffff, /* dst_mask */
468 FALSE), /* pcrel_offset */
469
470 /* This is used only by the dynamic linker. The symbol should exist
471 both in the object being run and in some shared library. The
472 dynamic linker copies the data addressed by the symbol from the
473 shared library into the object, because the object being
474 run has to have the data at some particular address. */
475 HOWTO (R_PPC64_COPY, /* type */
476 0, /* rightshift */
477 0, /* this one is variable size */
478 0, /* bitsize */
479 FALSE, /* pc_relative */
480 0, /* bitpos */
481 complain_overflow_dont, /* complain_on_overflow */
482 ppc64_elf_unhandled_reloc, /* special_function */
483 "R_PPC64_COPY", /* name */
484 FALSE, /* partial_inplace */
485 0, /* src_mask */
486 0, /* dst_mask */
487 FALSE), /* pcrel_offset */
488
489 /* Like R_PPC64_ADDR64, but used when setting global offset table
490 entries. */
491 HOWTO (R_PPC64_GLOB_DAT, /* type */
492 0, /* rightshift */
493 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
494 64, /* bitsize */
495 FALSE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_dont, /* complain_on_overflow */
498 ppc64_elf_unhandled_reloc, /* special_function */
499 "R_PPC64_GLOB_DAT", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 ONES (64), /* dst_mask */
503 FALSE), /* pcrel_offset */
504
505 /* Created by the link editor. Marks a procedure linkage table
506 entry for a symbol. */
507 HOWTO (R_PPC64_JMP_SLOT, /* type */
508 0, /* rightshift */
509 0, /* size (0 = byte, 1 = short, 2 = long) */
510 0, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_JMP_SLOT", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Used only by the dynamic linker. When the object is run, this
522 doubleword64 is set to the load address of the object, plus the
523 addend. */
524 HOWTO (R_PPC64_RELATIVE, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC64_RELATIVE", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Like R_PPC64_ADDR32, but may be unaligned. */
539 HOWTO (R_PPC64_UADDR32, /* type */
540 0, /* rightshift */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
542 32, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_bitfield, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_PPC64_UADDR32", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffffffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Like R_PPC64_ADDR16, but may be unaligned. */
554 HOWTO (R_PPC64_UADDR16, /* type */
555 0, /* rightshift */
556 1, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 0, /* bitpos */
560 complain_overflow_bitfield, /* complain_on_overflow */
561 bfd_elf_generic_reloc, /* special_function */
562 "R_PPC64_UADDR16", /* name */
563 FALSE, /* partial_inplace */
564 0, /* src_mask */
565 0xffff, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 /* 32-bit PC relative. */
569 HOWTO (R_PPC64_REL32, /* type */
570 0, /* rightshift */
571 2, /* size (0 = byte, 1 = short, 2 = long) */
572 32, /* bitsize */
573 TRUE, /* pc_relative */
574 0, /* bitpos */
575 /* FIXME: Verify. Was complain_overflow_bitfield. */
576 complain_overflow_signed, /* complain_on_overflow */
577 bfd_elf_generic_reloc, /* special_function */
578 "R_PPC64_REL32", /* name */
579 FALSE, /* partial_inplace */
580 0, /* src_mask */
581 0xffffffff, /* dst_mask */
582 TRUE), /* pcrel_offset */
583
584 /* 32-bit relocation to the symbol's procedure linkage table. */
585 HOWTO (R_PPC64_PLT32, /* type */
586 0, /* rightshift */
587 2, /* size (0 = byte, 1 = short, 2 = long) */
588 32, /* bitsize */
589 FALSE, /* pc_relative */
590 0, /* bitpos */
591 complain_overflow_bitfield, /* complain_on_overflow */
592 ppc64_elf_unhandled_reloc, /* special_function */
593 "R_PPC64_PLT32", /* name */
594 FALSE, /* partial_inplace */
595 0, /* src_mask */
596 0xffffffff, /* dst_mask */
597 FALSE), /* pcrel_offset */
598
599 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
600 FIXME: R_PPC64_PLTREL32 not supported. */
601 HOWTO (R_PPC64_PLTREL32, /* type */
602 0, /* rightshift */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
604 32, /* bitsize */
605 TRUE, /* pc_relative */
606 0, /* bitpos */
607 complain_overflow_signed, /* complain_on_overflow */
608 bfd_elf_generic_reloc, /* special_function */
609 "R_PPC64_PLTREL32", /* name */
610 FALSE, /* partial_inplace */
611 0, /* src_mask */
612 0xffffffff, /* dst_mask */
613 TRUE), /* pcrel_offset */
614
615 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
616 the symbol. */
617 HOWTO (R_PPC64_PLT16_LO, /* type */
618 0, /* rightshift */
619 1, /* size (0 = byte, 1 = short, 2 = long) */
620 16, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_dont, /* complain_on_overflow */
624 ppc64_elf_unhandled_reloc, /* special_function */
625 "R_PPC64_PLT16_LO", /* name */
626 FALSE, /* partial_inplace */
627 0, /* src_mask */
628 0xffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
632 the symbol. */
633 HOWTO (R_PPC64_PLT16_HI, /* type */
634 16, /* rightshift */
635 1, /* size (0 = byte, 1 = short, 2 = long) */
636 16, /* bitsize */
637 FALSE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_dont, /* complain_on_overflow */
640 ppc64_elf_unhandled_reloc, /* special_function */
641 "R_PPC64_PLT16_HI", /* name */
642 FALSE, /* partial_inplace */
643 0, /* src_mask */
644 0xffff, /* dst_mask */
645 FALSE), /* pcrel_offset */
646
647 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
648 the symbol. */
649 HOWTO (R_PPC64_PLT16_HA, /* type */
650 16, /* rightshift */
651 1, /* size (0 = byte, 1 = short, 2 = long) */
652 16, /* bitsize */
653 FALSE, /* pc_relative */
654 0, /* bitpos */
655 complain_overflow_dont, /* complain_on_overflow */
656 ppc64_elf_unhandled_reloc, /* special_function */
657 "R_PPC64_PLT16_HA", /* name */
658 FALSE, /* partial_inplace */
659 0, /* src_mask */
660 0xffff, /* dst_mask */
661 FALSE), /* pcrel_offset */
662
663 /* 16-bit section relative relocation. */
664 HOWTO (R_PPC64_SECTOFF, /* type */
665 0, /* rightshift */
666 1, /* size (0 = byte, 1 = short, 2 = long) */
667 16, /* bitsize */
668 FALSE, /* pc_relative */
669 0, /* bitpos */
670 complain_overflow_bitfield, /* complain_on_overflow */
671 ppc64_elf_sectoff_reloc, /* special_function */
672 "R_PPC64_SECTOFF", /* name */
673 FALSE, /* partial_inplace */
674 0, /* src_mask */
675 0xffff, /* dst_mask */
676 FALSE), /* pcrel_offset */
677
678 /* Like R_PPC64_SECTOFF, but no overflow warning. */
679 HOWTO (R_PPC64_SECTOFF_LO, /* type */
680 0, /* rightshift */
681 1, /* size (0 = byte, 1 = short, 2 = long) */
682 16, /* bitsize */
683 FALSE, /* pc_relative */
684 0, /* bitpos */
685 complain_overflow_dont, /* complain_on_overflow */
686 ppc64_elf_sectoff_reloc, /* special_function */
687 "R_PPC64_SECTOFF_LO", /* name */
688 FALSE, /* partial_inplace */
689 0, /* src_mask */
690 0xffff, /* dst_mask */
691 FALSE), /* pcrel_offset */
692
693 /* 16-bit upper half section relative relocation. */
694 HOWTO (R_PPC64_SECTOFF_HI, /* type */
695 16, /* rightshift */
696 1, /* size (0 = byte, 1 = short, 2 = long) */
697 16, /* bitsize */
698 FALSE, /* pc_relative */
699 0, /* bitpos */
700 complain_overflow_dont, /* complain_on_overflow */
701 ppc64_elf_sectoff_reloc, /* special_function */
702 "R_PPC64_SECTOFF_HI", /* name */
703 FALSE, /* partial_inplace */
704 0, /* src_mask */
705 0xffff, /* dst_mask */
706 FALSE), /* pcrel_offset */
707
708 /* 16-bit upper half adjusted section relative relocation. */
709 HOWTO (R_PPC64_SECTOFF_HA, /* type */
710 16, /* rightshift */
711 1, /* size (0 = byte, 1 = short, 2 = long) */
712 16, /* bitsize */
713 FALSE, /* pc_relative */
714 0, /* bitpos */
715 complain_overflow_dont, /* complain_on_overflow */
716 ppc64_elf_sectoff_ha_reloc, /* special_function */
717 "R_PPC64_SECTOFF_HA", /* name */
718 FALSE, /* partial_inplace */
719 0, /* src_mask */
720 0xffff, /* dst_mask */
721 FALSE), /* pcrel_offset */
722
723 /* Like R_PPC64_REL24 without touching the two least significant bits. */
724 HOWTO (R_PPC64_REL30, /* type */
725 2, /* rightshift */
726 2, /* size (0 = byte, 1 = short, 2 = long) */
727 30, /* bitsize */
728 TRUE, /* pc_relative */
729 0, /* bitpos */
730 complain_overflow_dont, /* complain_on_overflow */
731 bfd_elf_generic_reloc, /* special_function */
732 "R_PPC64_REL30", /* name */
733 FALSE, /* partial_inplace */
734 0, /* src_mask */
735 0xfffffffc, /* dst_mask */
736 TRUE), /* pcrel_offset */
737
738 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
739
740 /* A standard 64-bit relocation. */
741 HOWTO (R_PPC64_ADDR64, /* type */
742 0, /* rightshift */
743 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
744 64, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont, /* complain_on_overflow */
748 bfd_elf_generic_reloc, /* special_function */
749 "R_PPC64_ADDR64", /* name */
750 FALSE, /* partial_inplace */
751 0, /* src_mask */
752 ONES (64), /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 /* The bits 32-47 of an address. */
756 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
757 32, /* rightshift */
758 1, /* size (0 = byte, 1 = short, 2 = long) */
759 16, /* bitsize */
760 FALSE, /* pc_relative */
761 0, /* bitpos */
762 complain_overflow_dont, /* complain_on_overflow */
763 bfd_elf_generic_reloc, /* special_function */
764 "R_PPC64_ADDR16_HIGHER", /* name */
765 FALSE, /* partial_inplace */
766 0, /* src_mask */
767 0xffff, /* dst_mask */
768 FALSE), /* pcrel_offset */
769
770 /* The bits 32-47 of an address, plus 1 if the contents of the low
771 16 bits, treated as a signed number, is negative. */
772 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
773 32, /* rightshift */
774 1, /* size (0 = byte, 1 = short, 2 = long) */
775 16, /* bitsize */
776 FALSE, /* pc_relative */
777 0, /* bitpos */
778 complain_overflow_dont, /* complain_on_overflow */
779 ppc64_elf_ha_reloc, /* special_function */
780 "R_PPC64_ADDR16_HIGHERA", /* name */
781 FALSE, /* partial_inplace */
782 0, /* src_mask */
783 0xffff, /* dst_mask */
784 FALSE), /* pcrel_offset */
785
786 /* The bits 48-63 of an address. */
787 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
788 48, /* rightshift */
789 1, /* size (0 = byte, 1 = short, 2 = long) */
790 16, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC64_ADDR16_HIGHEST", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0xffff, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 /* The bits 48-63 of an address, plus 1 if the contents of the low
802 16 bits, treated as a signed number, is negative. */
803 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
804 48, /* rightshift */
805 1, /* size (0 = byte, 1 = short, 2 = long) */
806 16, /* bitsize */
807 FALSE, /* pc_relative */
808 0, /* bitpos */
809 complain_overflow_dont, /* complain_on_overflow */
810 ppc64_elf_ha_reloc, /* special_function */
811 "R_PPC64_ADDR16_HIGHESTA", /* name */
812 FALSE, /* partial_inplace */
813 0, /* src_mask */
814 0xffff, /* dst_mask */
815 FALSE), /* pcrel_offset */
816
817 /* Like ADDR64, but may be unaligned. */
818 HOWTO (R_PPC64_UADDR64, /* type */
819 0, /* rightshift */
820 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
821 64, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 bfd_elf_generic_reloc, /* special_function */
826 "R_PPC64_UADDR64", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 ONES (64), /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* 64-bit relative relocation. */
833 HOWTO (R_PPC64_REL64, /* type */
834 0, /* rightshift */
835 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
836 64, /* bitsize */
837 TRUE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_dont, /* complain_on_overflow */
840 bfd_elf_generic_reloc, /* special_function */
841 "R_PPC64_REL64", /* name */
842 FALSE, /* partial_inplace */
843 0, /* src_mask */
844 ONES (64), /* dst_mask */
845 TRUE), /* pcrel_offset */
846
847 /* 64-bit relocation to the symbol's procedure linkage table. */
848 HOWTO (R_PPC64_PLT64, /* type */
849 0, /* rightshift */
850 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
851 64, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_dont, /* complain_on_overflow */
855 ppc64_elf_unhandled_reloc, /* special_function */
856 "R_PPC64_PLT64", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 ONES (64), /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* 64-bit PC relative relocation to the symbol's procedure linkage
863 table. */
864 /* FIXME: R_PPC64_PLTREL64 not supported. */
865 HOWTO (R_PPC64_PLTREL64, /* type */
866 0, /* rightshift */
867 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
868 64, /* bitsize */
869 TRUE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc64_elf_unhandled_reloc, /* special_function */
873 "R_PPC64_PLTREL64", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 ONES (64), /* dst_mask */
877 TRUE), /* pcrel_offset */
878
879 /* 16 bit TOC-relative relocation. */
880
881 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
882 HOWTO (R_PPC64_TOC16, /* type */
883 0, /* rightshift */
884 1, /* size (0 = byte, 1 = short, 2 = long) */
885 16, /* bitsize */
886 FALSE, /* pc_relative */
887 0, /* bitpos */
888 complain_overflow_signed, /* complain_on_overflow */
889 ppc64_elf_toc_reloc, /* special_function */
890 "R_PPC64_TOC16", /* name */
891 FALSE, /* partial_inplace */
892 0, /* src_mask */
893 0xffff, /* dst_mask */
894 FALSE), /* pcrel_offset */
895
896 /* 16 bit TOC-relative relocation without overflow. */
897
898 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
899 HOWTO (R_PPC64_TOC16_LO, /* type */
900 0, /* rightshift */
901 1, /* size (0 = byte, 1 = short, 2 = long) */
902 16, /* bitsize */
903 FALSE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc64_elf_toc_reloc, /* special_function */
907 "R_PPC64_TOC16_LO", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 0xffff, /* dst_mask */
911 FALSE), /* pcrel_offset */
912
913 /* 16 bit TOC-relative relocation, high 16 bits. */
914
915 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
916 HOWTO (R_PPC64_TOC16_HI, /* type */
917 16, /* rightshift */
918 1, /* size (0 = byte, 1 = short, 2 = long) */
919 16, /* bitsize */
920 FALSE, /* pc_relative */
921 0, /* bitpos */
922 complain_overflow_dont, /* complain_on_overflow */
923 ppc64_elf_toc_reloc, /* special_function */
924 "R_PPC64_TOC16_HI", /* name */
925 FALSE, /* partial_inplace */
926 0, /* src_mask */
927 0xffff, /* dst_mask */
928 FALSE), /* pcrel_offset */
929
930 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
931 contents of the low 16 bits, treated as a signed number, is
932 negative. */
933
934 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_HA, /* type */
936 16, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_ha_reloc, /* special_function */
943 "R_PPC64_TOC16_HA", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 64-bit relocation; insert value of TOC base (.TOC.). */
950
951 /* R_PPC64_TOC 51 doubleword64 .TOC. */
952 HOWTO (R_PPC64_TOC, /* type */
953 0, /* rightshift */
954 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
955 64, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_bitfield, /* complain_on_overflow */
959 ppc64_elf_toc64_reloc, /* special_function */
960 "R_PPC64_TOC", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 ONES (64), /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* Like R_PPC64_GOT16, but also informs the link editor that the
967 value to relocate may (!) refer to a PLT entry which the link
968 editor (a) may replace with the symbol value. If the link editor
969 is unable to fully resolve the symbol, it may (b) create a PLT
970 entry and store the address to the new PLT entry in the GOT.
971 This permits lazy resolution of function symbols at run time.
972 The link editor may also skip all of this and just (c) emit a
973 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
974 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
975 HOWTO (R_PPC64_PLTGOT16, /* type */
976 0, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_signed, /* complain_on_overflow */
982 ppc64_elf_unhandled_reloc, /* special_function */
983 "R_PPC64_PLTGOT16", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* Like R_PPC64_PLTGOT16, but without overflow. */
990 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
991 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
992 0, /* rightshift */
993 1, /* size (0 = byte, 1 = short, 2 = long) */
994 16, /* bitsize */
995 FALSE, /* pc_relative */
996 0, /* bitpos */
997 complain_overflow_dont, /* complain_on_overflow */
998 ppc64_elf_unhandled_reloc, /* special_function */
999 "R_PPC64_PLTGOT16_LO", /* name */
1000 FALSE, /* partial_inplace */
1001 0, /* src_mask */
1002 0xffff, /* dst_mask */
1003 FALSE), /* pcrel_offset */
1004
1005 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1006 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1007 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1008 16, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_dont, /* complain_on_overflow */
1014 ppc64_elf_unhandled_reloc, /* special_function */
1015 "R_PPC64_PLTGOT16_HI", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1022 1 if the contents of the low 16 bits, treated as a signed number,
1023 is negative. */
1024 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1025 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1026 16, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont,/* complain_on_overflow */
1032 ppc64_elf_unhandled_reloc, /* special_function */
1033 "R_PPC64_PLTGOT16_HA", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1040 HOWTO (R_PPC64_ADDR16_DS, /* type */
1041 0, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_bitfield, /* complain_on_overflow */
1047 bfd_elf_generic_reloc, /* special_function */
1048 "R_PPC64_ADDR16_DS", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xfffc, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1055 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1056 0, /* rightshift */
1057 1, /* size (0 = byte, 1 = short, 2 = long) */
1058 16, /* bitsize */
1059 FALSE, /* pc_relative */
1060 0, /* bitpos */
1061 complain_overflow_dont,/* complain_on_overflow */
1062 bfd_elf_generic_reloc, /* special_function */
1063 "R_PPC64_ADDR16_LO_DS",/* name */
1064 FALSE, /* partial_inplace */
1065 0, /* src_mask */
1066 0xfffc, /* dst_mask */
1067 FALSE), /* pcrel_offset */
1068
1069 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1070 HOWTO (R_PPC64_GOT16_DS, /* type */
1071 0, /* rightshift */
1072 1, /* size (0 = byte, 1 = short, 2 = long) */
1073 16, /* bitsize */
1074 FALSE, /* pc_relative */
1075 0, /* bitpos */
1076 complain_overflow_signed, /* complain_on_overflow */
1077 ppc64_elf_unhandled_reloc, /* special_function */
1078 "R_PPC64_GOT16_DS", /* name */
1079 FALSE, /* partial_inplace */
1080 0, /* src_mask */
1081 0xfffc, /* dst_mask */
1082 FALSE), /* pcrel_offset */
1083
1084 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1085 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1086 0, /* rightshift */
1087 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 16, /* bitsize */
1089 FALSE, /* pc_relative */
1090 0, /* bitpos */
1091 complain_overflow_dont, /* complain_on_overflow */
1092 ppc64_elf_unhandled_reloc, /* special_function */
1093 "R_PPC64_GOT16_LO_DS", /* name */
1094 FALSE, /* partial_inplace */
1095 0, /* src_mask */
1096 0xfffc, /* dst_mask */
1097 FALSE), /* pcrel_offset */
1098
1099 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1100 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1101 0, /* rightshift */
1102 1, /* size (0 = byte, 1 = short, 2 = long) */
1103 16, /* bitsize */
1104 FALSE, /* pc_relative */
1105 0, /* bitpos */
1106 complain_overflow_dont, /* complain_on_overflow */
1107 ppc64_elf_unhandled_reloc, /* special_function */
1108 "R_PPC64_PLT16_LO_DS", /* name */
1109 FALSE, /* partial_inplace */
1110 0, /* src_mask */
1111 0xfffc, /* dst_mask */
1112 FALSE), /* pcrel_offset */
1113
1114 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1115 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1116 0, /* rightshift */
1117 1, /* size (0 = byte, 1 = short, 2 = long) */
1118 16, /* bitsize */
1119 FALSE, /* pc_relative */
1120 0, /* bitpos */
1121 complain_overflow_bitfield, /* complain_on_overflow */
1122 ppc64_elf_sectoff_reloc, /* special_function */
1123 "R_PPC64_SECTOFF_DS", /* name */
1124 FALSE, /* partial_inplace */
1125 0, /* src_mask */
1126 0xfffc, /* dst_mask */
1127 FALSE), /* pcrel_offset */
1128
1129 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1130 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1131 0, /* rightshift */
1132 1, /* size (0 = byte, 1 = short, 2 = long) */
1133 16, /* bitsize */
1134 FALSE, /* pc_relative */
1135 0, /* bitpos */
1136 complain_overflow_dont, /* complain_on_overflow */
1137 ppc64_elf_sectoff_reloc, /* special_function */
1138 "R_PPC64_SECTOFF_LO_DS",/* name */
1139 FALSE, /* partial_inplace */
1140 0, /* src_mask */
1141 0xfffc, /* dst_mask */
1142 FALSE), /* pcrel_offset */
1143
1144 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1145 HOWTO (R_PPC64_TOC16_DS, /* type */
1146 0, /* rightshift */
1147 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 16, /* bitsize */
1149 FALSE, /* pc_relative */
1150 0, /* bitpos */
1151 complain_overflow_signed, /* complain_on_overflow */
1152 ppc64_elf_toc_reloc, /* special_function */
1153 "R_PPC64_TOC16_DS", /* name */
1154 FALSE, /* partial_inplace */
1155 0, /* src_mask */
1156 0xfffc, /* dst_mask */
1157 FALSE), /* pcrel_offset */
1158
1159 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1160 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1161 0, /* rightshift */
1162 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 16, /* bitsize */
1164 FALSE, /* pc_relative */
1165 0, /* bitpos */
1166 complain_overflow_dont, /* complain_on_overflow */
1167 ppc64_elf_toc_reloc, /* special_function */
1168 "R_PPC64_TOC16_LO_DS", /* name */
1169 FALSE, /* partial_inplace */
1170 0, /* src_mask */
1171 0xfffc, /* dst_mask */
1172 FALSE), /* pcrel_offset */
1173
1174 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1175 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1176 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1177 0, /* rightshift */
1178 1, /* size (0 = byte, 1 = short, 2 = long) */
1179 16, /* bitsize */
1180 FALSE, /* pc_relative */
1181 0, /* bitpos */
1182 complain_overflow_signed, /* complain_on_overflow */
1183 ppc64_elf_unhandled_reloc, /* special_function */
1184 "R_PPC64_PLTGOT16_DS", /* name */
1185 FALSE, /* partial_inplace */
1186 0, /* src_mask */
1187 0xfffc, /* dst_mask */
1188 FALSE), /* pcrel_offset */
1189
1190 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1191 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1192 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1193 0, /* rightshift */
1194 1, /* size (0 = byte, 1 = short, 2 = long) */
1195 16, /* bitsize */
1196 FALSE, /* pc_relative */
1197 0, /* bitpos */
1198 complain_overflow_dont, /* complain_on_overflow */
1199 ppc64_elf_unhandled_reloc, /* special_function */
1200 "R_PPC64_PLTGOT16_LO_DS",/* name */
1201 FALSE, /* partial_inplace */
1202 0, /* src_mask */
1203 0xfffc, /* dst_mask */
1204 FALSE), /* pcrel_offset */
1205
1206 /* Marker reloc for TLS. */
1207 HOWTO (R_PPC64_TLS,
1208 0, /* rightshift */
1209 2, /* size (0 = byte, 1 = short, 2 = long) */
1210 32, /* bitsize */
1211 FALSE, /* pc_relative */
1212 0, /* bitpos */
1213 complain_overflow_dont, /* complain_on_overflow */
1214 bfd_elf_generic_reloc, /* special_function */
1215 "R_PPC64_TLS", /* name */
1216 FALSE, /* partial_inplace */
1217 0, /* src_mask */
1218 0, /* dst_mask */
1219 FALSE), /* pcrel_offset */
1220
1221 /* Computes the load module index of the load module that contains the
1222 definition of its TLS sym. */
1223 HOWTO (R_PPC64_DTPMOD64,
1224 0, /* rightshift */
1225 4, /* size (0 = byte, 1 = short, 2 = long) */
1226 64, /* bitsize */
1227 FALSE, /* pc_relative */
1228 0, /* bitpos */
1229 complain_overflow_dont, /* complain_on_overflow */
1230 ppc64_elf_unhandled_reloc, /* special_function */
1231 "R_PPC64_DTPMOD64", /* name */
1232 FALSE, /* partial_inplace */
1233 0, /* src_mask */
1234 ONES (64), /* dst_mask */
1235 FALSE), /* pcrel_offset */
1236
1237 /* Computes a dtv-relative displacement, the difference between the value
1238 of sym+add and the base address of the thread-local storage block that
1239 contains the definition of sym, minus 0x8000. */
1240 HOWTO (R_PPC64_DTPREL64,
1241 0, /* rightshift */
1242 4, /* size (0 = byte, 1 = short, 2 = long) */
1243 64, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 ppc64_elf_unhandled_reloc, /* special_function */
1248 "R_PPC64_DTPREL64", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 ONES (64), /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 /* A 16 bit dtprel reloc. */
1255 HOWTO (R_PPC64_DTPREL16,
1256 0, /* rightshift */
1257 1, /* size (0 = byte, 1 = short, 2 = long) */
1258 16, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_signed, /* complain_on_overflow */
1262 ppc64_elf_unhandled_reloc, /* special_function */
1263 "R_PPC64_DTPREL16", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 0xffff, /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 /* Like DTPREL16, but no overflow. */
1270 HOWTO (R_PPC64_DTPREL16_LO,
1271 0, /* rightshift */
1272 1, /* size (0 = byte, 1 = short, 2 = long) */
1273 16, /* bitsize */
1274 FALSE, /* pc_relative */
1275 0, /* bitpos */
1276 complain_overflow_dont, /* complain_on_overflow */
1277 ppc64_elf_unhandled_reloc, /* special_function */
1278 "R_PPC64_DTPREL16_LO", /* name */
1279 FALSE, /* partial_inplace */
1280 0, /* src_mask */
1281 0xffff, /* dst_mask */
1282 FALSE), /* pcrel_offset */
1283
1284 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1285 HOWTO (R_PPC64_DTPREL16_HI,
1286 16, /* rightshift */
1287 1, /* size (0 = byte, 1 = short, 2 = long) */
1288 16, /* bitsize */
1289 FALSE, /* pc_relative */
1290 0, /* bitpos */
1291 complain_overflow_dont, /* complain_on_overflow */
1292 ppc64_elf_unhandled_reloc, /* special_function */
1293 "R_PPC64_DTPREL16_HI", /* name */
1294 FALSE, /* partial_inplace */
1295 0, /* src_mask */
1296 0xffff, /* dst_mask */
1297 FALSE), /* pcrel_offset */
1298
1299 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1300 HOWTO (R_PPC64_DTPREL16_HA,
1301 16, /* rightshift */
1302 1, /* size (0 = byte, 1 = short, 2 = long) */
1303 16, /* bitsize */
1304 FALSE, /* pc_relative */
1305 0, /* bitpos */
1306 complain_overflow_dont, /* complain_on_overflow */
1307 ppc64_elf_unhandled_reloc, /* special_function */
1308 "R_PPC64_DTPREL16_HA", /* name */
1309 FALSE, /* partial_inplace */
1310 0, /* src_mask */
1311 0xffff, /* dst_mask */
1312 FALSE), /* pcrel_offset */
1313
1314 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1315 HOWTO (R_PPC64_DTPREL16_HIGHER,
1316 32, /* rightshift */
1317 1, /* size (0 = byte, 1 = short, 2 = long) */
1318 16, /* bitsize */
1319 FALSE, /* pc_relative */
1320 0, /* bitpos */
1321 complain_overflow_dont, /* complain_on_overflow */
1322 ppc64_elf_unhandled_reloc, /* special_function */
1323 "R_PPC64_DTPREL16_HIGHER", /* name */
1324 FALSE, /* partial_inplace */
1325 0, /* src_mask */
1326 0xffff, /* dst_mask */
1327 FALSE), /* pcrel_offset */
1328
1329 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1330 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1331 32, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_dont, /* complain_on_overflow */
1337 ppc64_elf_unhandled_reloc, /* special_function */
1338 "R_PPC64_DTPREL16_HIGHERA", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1345 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1346 48, /* rightshift */
1347 1, /* size (0 = byte, 1 = short, 2 = long) */
1348 16, /* bitsize */
1349 FALSE, /* pc_relative */
1350 0, /* bitpos */
1351 complain_overflow_dont, /* complain_on_overflow */
1352 ppc64_elf_unhandled_reloc, /* special_function */
1353 "R_PPC64_DTPREL16_HIGHEST", /* name */
1354 FALSE, /* partial_inplace */
1355 0, /* src_mask */
1356 0xffff, /* dst_mask */
1357 FALSE), /* pcrel_offset */
1358
1359 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1360 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1361 48, /* rightshift */
1362 1, /* size (0 = byte, 1 = short, 2 = long) */
1363 16, /* bitsize */
1364 FALSE, /* pc_relative */
1365 0, /* bitpos */
1366 complain_overflow_dont, /* complain_on_overflow */
1367 ppc64_elf_unhandled_reloc, /* special_function */
1368 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1369 FALSE, /* partial_inplace */
1370 0, /* src_mask */
1371 0xffff, /* dst_mask */
1372 FALSE), /* pcrel_offset */
1373
1374 /* Like DTPREL16, but for insns with a DS field. */
1375 HOWTO (R_PPC64_DTPREL16_DS,
1376 0, /* rightshift */
1377 1, /* size (0 = byte, 1 = short, 2 = long) */
1378 16, /* bitsize */
1379 FALSE, /* pc_relative */
1380 0, /* bitpos */
1381 complain_overflow_signed, /* complain_on_overflow */
1382 ppc64_elf_unhandled_reloc, /* special_function */
1383 "R_PPC64_DTPREL16_DS", /* name */
1384 FALSE, /* partial_inplace */
1385 0, /* src_mask */
1386 0xfffc, /* dst_mask */
1387 FALSE), /* pcrel_offset */
1388
1389 /* Like DTPREL16_DS, but no overflow. */
1390 HOWTO (R_PPC64_DTPREL16_LO_DS,
1391 0, /* rightshift */
1392 1, /* size (0 = byte, 1 = short, 2 = long) */
1393 16, /* bitsize */
1394 FALSE, /* pc_relative */
1395 0, /* bitpos */
1396 complain_overflow_dont, /* complain_on_overflow */
1397 ppc64_elf_unhandled_reloc, /* special_function */
1398 "R_PPC64_DTPREL16_LO_DS", /* name */
1399 FALSE, /* partial_inplace */
1400 0, /* src_mask */
1401 0xfffc, /* dst_mask */
1402 FALSE), /* pcrel_offset */
1403
1404 /* Computes a tp-relative displacement, the difference between the value of
1405 sym+add and the value of the thread pointer (r13). */
1406 HOWTO (R_PPC64_TPREL64,
1407 0, /* rightshift */
1408 4, /* size (0 = byte, 1 = short, 2 = long) */
1409 64, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_TPREL64", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 ONES (64), /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* A 16 bit tprel reloc. */
1421 HOWTO (R_PPC64_TPREL16,
1422 0, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_signed, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_TPREL16", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like TPREL16, but no overflow. */
1436 HOWTO (R_PPC64_TPREL16_LO,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_dont, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_TPREL16_LO", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xffff, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like TPREL16_LO, but next higher group of 16 bits. */
1451 HOWTO (R_PPC64_TPREL16_HI,
1452 16, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_TPREL16_HI", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xffff, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Like TPREL16_HI, but adjust for low 16 bits. */
1466 HOWTO (R_PPC64_TPREL16_HA,
1467 16, /* rightshift */
1468 1, /* size (0 = byte, 1 = short, 2 = long) */
1469 16, /* bitsize */
1470 FALSE, /* pc_relative */
1471 0, /* bitpos */
1472 complain_overflow_dont, /* complain_on_overflow */
1473 ppc64_elf_unhandled_reloc, /* special_function */
1474 "R_PPC64_TPREL16_HA", /* name */
1475 FALSE, /* partial_inplace */
1476 0, /* src_mask */
1477 0xffff, /* dst_mask */
1478 FALSE), /* pcrel_offset */
1479
1480 /* Like TPREL16_HI, but next higher group of 16 bits. */
1481 HOWTO (R_PPC64_TPREL16_HIGHER,
1482 32, /* rightshift */
1483 1, /* size (0 = byte, 1 = short, 2 = long) */
1484 16, /* bitsize */
1485 FALSE, /* pc_relative */
1486 0, /* bitpos */
1487 complain_overflow_dont, /* complain_on_overflow */
1488 ppc64_elf_unhandled_reloc, /* special_function */
1489 "R_PPC64_TPREL16_HIGHER", /* name */
1490 FALSE, /* partial_inplace */
1491 0, /* src_mask */
1492 0xffff, /* dst_mask */
1493 FALSE), /* pcrel_offset */
1494
1495 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1496 HOWTO (R_PPC64_TPREL16_HIGHERA,
1497 32, /* rightshift */
1498 1, /* size (0 = byte, 1 = short, 2 = long) */
1499 16, /* bitsize */
1500 FALSE, /* pc_relative */
1501 0, /* bitpos */
1502 complain_overflow_dont, /* complain_on_overflow */
1503 ppc64_elf_unhandled_reloc, /* special_function */
1504 "R_PPC64_TPREL16_HIGHERA", /* name */
1505 FALSE, /* partial_inplace */
1506 0, /* src_mask */
1507 0xffff, /* dst_mask */
1508 FALSE), /* pcrel_offset */
1509
1510 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1511 HOWTO (R_PPC64_TPREL16_HIGHEST,
1512 48, /* rightshift */
1513 1, /* size (0 = byte, 1 = short, 2 = long) */
1514 16, /* bitsize */
1515 FALSE, /* pc_relative */
1516 0, /* bitpos */
1517 complain_overflow_dont, /* complain_on_overflow */
1518 ppc64_elf_unhandled_reloc, /* special_function */
1519 "R_PPC64_TPREL16_HIGHEST", /* name */
1520 FALSE, /* partial_inplace */
1521 0, /* src_mask */
1522 0xffff, /* dst_mask */
1523 FALSE), /* pcrel_offset */
1524
1525 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1526 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1527 48, /* rightshift */
1528 1, /* size (0 = byte, 1 = short, 2 = long) */
1529 16, /* bitsize */
1530 FALSE, /* pc_relative */
1531 0, /* bitpos */
1532 complain_overflow_dont, /* complain_on_overflow */
1533 ppc64_elf_unhandled_reloc, /* special_function */
1534 "R_PPC64_TPREL16_HIGHESTA", /* name */
1535 FALSE, /* partial_inplace */
1536 0, /* src_mask */
1537 0xffff, /* dst_mask */
1538 FALSE), /* pcrel_offset */
1539
1540 /* Like TPREL16, but for insns with a DS field. */
1541 HOWTO (R_PPC64_TPREL16_DS,
1542 0, /* rightshift */
1543 1, /* size (0 = byte, 1 = short, 2 = long) */
1544 16, /* bitsize */
1545 FALSE, /* pc_relative */
1546 0, /* bitpos */
1547 complain_overflow_signed, /* complain_on_overflow */
1548 ppc64_elf_unhandled_reloc, /* special_function */
1549 "R_PPC64_TPREL16_DS", /* name */
1550 FALSE, /* partial_inplace */
1551 0, /* src_mask */
1552 0xfffc, /* dst_mask */
1553 FALSE), /* pcrel_offset */
1554
1555 /* Like TPREL16_DS, but no overflow. */
1556 HOWTO (R_PPC64_TPREL16_LO_DS,
1557 0, /* rightshift */
1558 1, /* size (0 = byte, 1 = short, 2 = long) */
1559 16, /* bitsize */
1560 FALSE, /* pc_relative */
1561 0, /* bitpos */
1562 complain_overflow_dont, /* complain_on_overflow */
1563 ppc64_elf_unhandled_reloc, /* special_function */
1564 "R_PPC64_TPREL16_LO_DS", /* name */
1565 FALSE, /* partial_inplace */
1566 0, /* src_mask */
1567 0xfffc, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1569
1570 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1571 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1572 to the first entry relative to the TOC base (r2). */
1573 HOWTO (R_PPC64_GOT_TLSGD16,
1574 0, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_signed, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_GOT_TLSGD16", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xffff, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like GOT_TLSGD16, but no overflow. */
1588 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1589 0, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_GOT_TLSGD16_LO", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xffff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1603 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1604 16, /* rightshift */
1605 1, /* size (0 = byte, 1 = short, 2 = long) */
1606 16, /* bitsize */
1607 FALSE, /* pc_relative */
1608 0, /* bitpos */
1609 complain_overflow_dont, /* complain_on_overflow */
1610 ppc64_elf_unhandled_reloc, /* special_function */
1611 "R_PPC64_GOT_TLSGD16_HI", /* name */
1612 FALSE, /* partial_inplace */
1613 0, /* src_mask */
1614 0xffff, /* dst_mask */
1615 FALSE), /* pcrel_offset */
1616
1617 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1618 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1619 16, /* rightshift */
1620 1, /* size (0 = byte, 1 = short, 2 = long) */
1621 16, /* bitsize */
1622 FALSE, /* pc_relative */
1623 0, /* bitpos */
1624 complain_overflow_dont, /* complain_on_overflow */
1625 ppc64_elf_unhandled_reloc, /* special_function */
1626 "R_PPC64_GOT_TLSGD16_HA", /* name */
1627 FALSE, /* partial_inplace */
1628 0, /* src_mask */
1629 0xffff, /* dst_mask */
1630 FALSE), /* pcrel_offset */
1631
1632 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1633 with values (sym+add)@dtpmod and zero, and computes the offset to the
1634 first entry relative to the TOC base (r2). */
1635 HOWTO (R_PPC64_GOT_TLSLD16,
1636 0, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_signed, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSLD16", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSLD16, but no overflow. */
1650 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1651 0, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSLD16_LO", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1665 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1666 16, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_dont, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_GOT_TLSLD16_HI", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xffff, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1680 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1681 16, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_GOT_TLSLD16_HA", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xffff, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1695 the offset to the entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_DTPREL16_DS", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xfffc, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_DTPREL16_DS, but no overflow. */
1711 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xfffc, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_DTPREL16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_DTPREL16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1756 offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_TPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_TPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_TPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_TPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_TPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_TPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_TPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* GNU extension to record C++ vtable hierarchy. */
1817 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1818 0, /* rightshift */
1819 0, /* size (0 = byte, 1 = short, 2 = long) */
1820 0, /* bitsize */
1821 FALSE, /* pc_relative */
1822 0, /* bitpos */
1823 complain_overflow_dont, /* complain_on_overflow */
1824 NULL, /* special_function */
1825 "R_PPC64_GNU_VTINHERIT", /* name */
1826 FALSE, /* partial_inplace */
1827 0, /* src_mask */
1828 0, /* dst_mask */
1829 FALSE), /* pcrel_offset */
1830
1831 /* GNU extension to record C++ vtable member usage. */
1832 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1833 0, /* rightshift */
1834 0, /* size (0 = byte, 1 = short, 2 = long) */
1835 0, /* bitsize */
1836 FALSE, /* pc_relative */
1837 0, /* bitpos */
1838 complain_overflow_dont, /* complain_on_overflow */
1839 NULL, /* special_function */
1840 "R_PPC64_GNU_VTENTRY", /* name */
1841 FALSE, /* partial_inplace */
1842 0, /* src_mask */
1843 0, /* dst_mask */
1844 FALSE), /* pcrel_offset */
1845 };
1846
1847 \f
1848 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1849 be done. */
1850
1851 static void
1852 ppc_howto_init (void)
1853 {
1854 unsigned int i, type;
1855
1856 for (i = 0;
1857 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1858 i++)
1859 {
1860 type = ppc64_elf_howto_raw[i].type;
1861 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1862 / sizeof (ppc64_elf_howto_table[0])));
1863 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1864 }
1865 }
1866
1867 static reloc_howto_type *
1868 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1869 bfd_reloc_code_real_type code)
1870 {
1871 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1872
1873 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1874 /* Initialize howto table if needed. */
1875 ppc_howto_init ();
1876
1877 switch (code)
1878 {
1879 default:
1880 return NULL;
1881
1882 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1883 break;
1884 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1885 break;
1886 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1887 break;
1888 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1889 break;
1890 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1891 break;
1892 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1893 break;
1894 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1895 break;
1896 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1897 break;
1898 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1899 break;
1900 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1901 break;
1902 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1903 break;
1904 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1905 break;
1906 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1907 break;
1908 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1909 break;
1910 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1911 break;
1912 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1913 break;
1914 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1915 break;
1916 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1917 break;
1918 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1919 break;
1920 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1921 break;
1922 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1923 break;
1924 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1925 break;
1926 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1927 break;
1928 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1929 break;
1930 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1931 break;
1932 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1933 break;
1934 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1935 break;
1936 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1937 break;
1938 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1939 break;
1940 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1941 break;
1942 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1943 break;
1944 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1945 break;
1946 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1947 break;
1948 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1949 break;
1950 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1951 break;
1952 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1953 break;
1954 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1955 break;
1956 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1957 break;
1958 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1959 break;
1960 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1961 break;
1962 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1963 break;
1964 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1965 break;
1966 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1967 break;
1968 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1969 break;
1970 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1971 break;
1972 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1973 break;
1974 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1975 break;
1976 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1977 break;
1978 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1979 break;
1980 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1981 break;
1982 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1983 break;
1984 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1985 break;
1986 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1987 break;
1988 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1989 break;
1990 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1991 break;
1992 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1993 break;
1994 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
1995 break;
1996 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
1997 break;
1998 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
1999 break;
2000 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2001 break;
2002 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2003 break;
2004 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2005 break;
2006 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2007 break;
2008 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2009 break;
2010 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2011 break;
2012 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2013 break;
2014 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2015 break;
2016 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2017 break;
2018 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2019 break;
2020 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2021 break;
2022 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2023 break;
2024 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2025 break;
2026 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2027 break;
2028 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2029 break;
2030 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2031 break;
2032 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2033 break;
2034 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2035 break;
2036 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2037 break;
2038 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2039 break;
2040 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2041 break;
2042 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2043 break;
2044 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2045 break;
2046 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2047 break;
2048 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2049 break;
2050 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2051 break;
2052 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2053 break;
2054 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2055 break;
2056 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2057 break;
2058 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2059 break;
2060 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2061 break;
2062 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2063 break;
2064 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2065 break;
2066 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2067 break;
2068 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2069 break;
2070 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2071 break;
2072 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2073 break;
2074 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2075 break;
2076 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2077 break;
2078 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2079 break;
2080 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2081 break;
2082 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2083 break;
2084 }
2085
2086 return ppc64_elf_howto_table[r];
2087 };
2088
2089 /* Set the howto pointer for a PowerPC ELF reloc. */
2090
2091 static void
2092 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2093 Elf_Internal_Rela *dst)
2094 {
2095 unsigned int type;
2096
2097 /* Initialize howto table if needed. */
2098 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2099 ppc_howto_init ();
2100
2101 type = ELF64_R_TYPE (dst->r_info);
2102 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2103 / sizeof (ppc64_elf_howto_table[0])));
2104 cache_ptr->howto = ppc64_elf_howto_table[type];
2105 }
2106
2107 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2108
2109 static bfd_reloc_status_type
2110 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2111 void *data, asection *input_section,
2112 bfd *output_bfd, char **error_message)
2113 {
2114 /* If this is a relocatable link (output_bfd test tells us), just
2115 call the generic function. Any adjustment will be done at final
2116 link time. */
2117 if (output_bfd != NULL)
2118 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2119 input_section, output_bfd, error_message);
2120
2121 /* Adjust the addend for sign extension of the low 16 bits.
2122 We won't actually be using the low 16 bits, so trashing them
2123 doesn't matter. */
2124 reloc_entry->addend += 0x8000;
2125 return bfd_reloc_continue;
2126 }
2127
2128 static bfd_reloc_status_type
2129 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2130 void *data, asection *input_section,
2131 bfd *output_bfd, char **error_message)
2132 {
2133 long insn;
2134 enum elf_ppc64_reloc_type r_type;
2135 bfd_size_type octets;
2136 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2137 bfd_boolean is_power4 = FALSE;
2138
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2147 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2148 insn &= ~(0x01 << 21);
2149 r_type = reloc_entry->howto->type;
2150 if (r_type == R_PPC64_ADDR14_BRTAKEN
2151 || r_type == R_PPC64_REL14_BRTAKEN)
2152 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2153
2154 if (is_power4)
2155 {
2156 /* Set 'a' bit. This is 0b00010 in BO field for branch
2157 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2158 for branch on CTR insns (BO == 1a00t or 1a01t). */
2159 if ((insn & (0x14 << 21)) == (0x04 << 21))
2160 insn |= 0x02 << 21;
2161 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2162 insn |= 0x08 << 21;
2163 else
2164 return bfd_reloc_continue;
2165 }
2166 else
2167 {
2168 bfd_vma target = 0;
2169 bfd_vma from;
2170
2171 if (!bfd_is_com_section (symbol->section))
2172 target = symbol->value;
2173 target += symbol->section->output_section->vma;
2174 target += symbol->section->output_offset;
2175 target += reloc_entry->addend;
2176
2177 from = (reloc_entry->address
2178 + input_section->output_offset
2179 + input_section->output_section->vma);
2180
2181 /* Invert 'y' bit if not the default. */
2182 if ((bfd_signed_vma) (target - from) < 0)
2183 insn ^= 0x01 << 21;
2184 }
2185 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2186 return bfd_reloc_continue;
2187 }
2188
2189 static bfd_reloc_status_type
2190 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2191 void *data, asection *input_section,
2192 bfd *output_bfd, char **error_message)
2193 {
2194 /* If this is a relocatable link (output_bfd test tells us), just
2195 call the generic function. Any adjustment will be done at final
2196 link time. */
2197 if (output_bfd != NULL)
2198 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2199 input_section, output_bfd, error_message);
2200
2201 /* Subtract the symbol section base address. */
2202 reloc_entry->addend -= symbol->section->output_section->vma;
2203 return bfd_reloc_continue;
2204 }
2205
2206 static bfd_reloc_status_type
2207 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2208 void *data, asection *input_section,
2209 bfd *output_bfd, char **error_message)
2210 {
2211 /* If this is a relocatable link (output_bfd test tells us), just
2212 call the generic function. Any adjustment will be done at final
2213 link time. */
2214 if (output_bfd != NULL)
2215 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2216 input_section, output_bfd, error_message);
2217
2218 /* Subtract the symbol section base address. */
2219 reloc_entry->addend -= symbol->section->output_section->vma;
2220
2221 /* Adjust the addend for sign extension of the low 16 bits. */
2222 reloc_entry->addend += 0x8000;
2223 return bfd_reloc_continue;
2224 }
2225
2226 static bfd_reloc_status_type
2227 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2228 void *data, asection *input_section,
2229 bfd *output_bfd, char **error_message)
2230 {
2231 bfd_vma TOCstart;
2232
2233 /* If this is a relocatable link (output_bfd test tells us), just
2234 call the generic function. Any adjustment will be done at final
2235 link time. */
2236 if (output_bfd != NULL)
2237 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2238 input_section, output_bfd, error_message);
2239
2240 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2241 if (TOCstart == 0)
2242 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2243
2244 /* Subtract the TOC base address. */
2245 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2246 return bfd_reloc_continue;
2247 }
2248
2249 static bfd_reloc_status_type
2250 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2251 void *data, asection *input_section,
2252 bfd *output_bfd, char **error_message)
2253 {
2254 bfd_vma TOCstart;
2255
2256 /* If this is a relocatable link (output_bfd test tells us), just
2257 call the generic function. Any adjustment will be done at final
2258 link time. */
2259 if (output_bfd != NULL)
2260 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2261 input_section, output_bfd, error_message);
2262
2263 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2264 if (TOCstart == 0)
2265 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2266
2267 /* Subtract the TOC base address. */
2268 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2269
2270 /* Adjust the addend for sign extension of the low 16 bits. */
2271 reloc_entry->addend += 0x8000;
2272 return bfd_reloc_continue;
2273 }
2274
2275 static bfd_reloc_status_type
2276 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2277 void *data, asection *input_section,
2278 bfd *output_bfd, char **error_message)
2279 {
2280 bfd_vma TOCstart;
2281 bfd_size_type octets;
2282
2283 /* If this is a relocatable link (output_bfd test tells us), just
2284 call the generic function. Any adjustment will be done at final
2285 link time. */
2286 if (output_bfd != NULL)
2287 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2288 input_section, output_bfd, error_message);
2289
2290 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2291 if (TOCstart == 0)
2292 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2293
2294 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2295 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2296 return bfd_reloc_ok;
2297 }
2298
2299 static bfd_reloc_status_type
2300 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2301 void *data, asection *input_section,
2302 bfd *output_bfd, char **error_message)
2303 {
2304 /* If this is a relocatable link (output_bfd test tells us), just
2305 call the generic function. Any adjustment will be done at final
2306 link time. */
2307 if (output_bfd != NULL)
2308 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2309 input_section, output_bfd, error_message);
2310
2311 if (error_message != NULL)
2312 {
2313 static char buf[60];
2314 sprintf (buf, "generic linker can't handle %s",
2315 reloc_entry->howto->name);
2316 *error_message = buf;
2317 }
2318 return bfd_reloc_dangerous;
2319 }
2320
2321 struct ppc64_elf_obj_tdata
2322 {
2323 struct elf_obj_tdata elf;
2324
2325 /* Shortcuts to dynamic linker sections. */
2326 asection *got;
2327 asection *relgot;
2328
2329 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2330 sections means we potentially need one of these for each input bfd. */
2331 union {
2332 bfd_signed_vma refcount;
2333 bfd_vma offset;
2334 } tlsld_got;
2335 };
2336
2337 #define ppc64_elf_tdata(bfd) \
2338 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2339
2340 #define ppc64_tlsld_got(bfd) \
2341 (&ppc64_elf_tdata (bfd)->tlsld_got)
2342
2343 /* Override the generic function because we store some extras. */
2344
2345 static bfd_boolean
2346 ppc64_elf_mkobject (bfd *abfd)
2347 {
2348 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2349 abfd->tdata.any = bfd_zalloc (abfd, amt);
2350 if (abfd->tdata.any == NULL)
2351 return FALSE;
2352 return TRUE;
2353 }
2354
2355 /* Fix bad default arch selected for a 64 bit input bfd when the
2356 default is 32 bit. */
2357
2358 static bfd_boolean
2359 ppc64_elf_object_p (bfd *abfd)
2360 {
2361 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2362 {
2363 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2364
2365 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2366 {
2367 /* Relies on arch after 32 bit default being 64 bit default. */
2368 abfd->arch_info = abfd->arch_info->next;
2369 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2370 }
2371 }
2372 return TRUE;
2373 }
2374
2375 /* Merge backend specific data from an object file to the output
2376 object file when linking. */
2377
2378 static bfd_boolean
2379 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2380 {
2381 /* Check if we have the same endianess. */
2382 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2383 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2384 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2385 {
2386 const char *msg;
2387
2388 if (bfd_big_endian (ibfd))
2389 msg = _("%s: compiled for a big endian system "
2390 "and target is little endian");
2391 else
2392 msg = _("%s: compiled for a little endian system "
2393 "and target is big endian");
2394
2395 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2396
2397 bfd_set_error (bfd_error_wrong_format);
2398 return FALSE;
2399 }
2400
2401 return TRUE;
2402 }
2403
2404 /* Add extra PPC sections. */
2405
2406 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2407 {
2408 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2409 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2410 { ".plt", 4, 0, SHT_NOBITS, 0 },
2411 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2412 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2413 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2414 { NULL, 0, 0, 0, 0 }
2415 };
2416
2417 struct _ppc64_elf_section_data
2418 {
2419 struct bfd_elf_section_data elf;
2420
2421 /* An array with one entry for each opd function descriptor. */
2422 union
2423 {
2424 /* Points to the function code section for local opd entries. */
2425 asection **func_sec;
2426 /* After editing .opd, adjust references to opd local syms. */
2427 long *adjust;
2428 } opd;
2429
2430 /* An array for toc sections, indexed by offset/8.
2431 Specifies the relocation symbol index used at a given toc offset. */
2432 unsigned *t_symndx;
2433 };
2434
2435 #define ppc64_elf_section_data(sec) \
2436 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2437
2438 static bfd_boolean
2439 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2440 {
2441 struct _ppc64_elf_section_data *sdata;
2442 bfd_size_type amt = sizeof (*sdata);
2443
2444 sdata = bfd_zalloc (abfd, amt);
2445 if (sdata == NULL)
2446 return FALSE;
2447 sec->used_by_bfd = sdata;
2448
2449 return _bfd_elf_new_section_hook (abfd, sec);
2450 }
2451 \f
2452 /* The following functions are specific to the ELF linker, while
2453 functions above are used generally. Those named ppc64_elf_* are
2454 called by the main ELF linker code. They appear in this file more
2455 or less in the order in which they are called. eg.
2456 ppc64_elf_check_relocs is called early in the link process,
2457 ppc64_elf_finish_dynamic_sections is one of the last functions
2458 called.
2459
2460 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2461 functions have both a function code symbol and a function descriptor
2462 symbol. A call to foo in a relocatable object file looks like:
2463
2464 . .text
2465 . x:
2466 . bl .foo
2467 . nop
2468
2469 The function definition in another object file might be:
2470
2471 . .section .opd
2472 . foo: .quad .foo
2473 . .quad .TOC.@tocbase
2474 . .quad 0
2475 .
2476 . .text
2477 . .foo: blr
2478
2479 When the linker resolves the call during a static link, the branch
2480 unsurprisingly just goes to .foo and the .opd information is unused.
2481 If the function definition is in a shared library, things are a little
2482 different: The call goes via a plt call stub, the opd information gets
2483 copied to the plt, and the linker patches the nop.
2484
2485 . x:
2486 . bl .foo_stub
2487 . ld 2,40(1)
2488 .
2489 .
2490 . .foo_stub:
2491 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2492 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2493 . std 2,40(1) # this is the general idea
2494 . ld 11,0(12)
2495 . ld 2,8(12)
2496 . mtctr 11
2497 . ld 11,16(12)
2498 . bctr
2499 .
2500 . .section .plt
2501 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2502
2503 The "reloc ()" notation is supposed to indicate that the linker emits
2504 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2505 copying.
2506
2507 What are the difficulties here? Well, firstly, the relocations
2508 examined by the linker in check_relocs are against the function code
2509 sym .foo, while the dynamic relocation in the plt is emitted against
2510 the function descriptor symbol, foo. Somewhere along the line, we need
2511 to carefully copy dynamic link information from one symbol to the other.
2512 Secondly, the generic part of the elf linker will make .foo a dynamic
2513 symbol as is normal for most other backends. We need foo dynamic
2514 instead, at least for an application final link. However, when
2515 creating a shared library containing foo, we need to have both symbols
2516 dynamic so that references to .foo are satisfied during the early
2517 stages of linking. Otherwise the linker might decide to pull in a
2518 definition from some other object, eg. a static library. */
2519
2520 /* The linker needs to keep track of the number of relocs that it
2521 decides to copy as dynamic relocs in check_relocs for each symbol.
2522 This is so that it can later discard them if they are found to be
2523 unnecessary. We store the information in a field extending the
2524 regular ELF linker hash table. */
2525
2526 struct ppc_dyn_relocs
2527 {
2528 struct ppc_dyn_relocs *next;
2529
2530 /* The input section of the reloc. */
2531 asection *sec;
2532
2533 /* Total number of relocs copied for the input section. */
2534 bfd_size_type count;
2535
2536 /* Number of pc-relative relocs copied for the input section. */
2537 bfd_size_type pc_count;
2538 };
2539
2540 /* Track GOT entries needed for a given symbol. We might need more
2541 than one got entry per symbol. */
2542 struct got_entry
2543 {
2544 struct got_entry *next;
2545
2546 /* The symbol addend that we'll be placing in the GOT. */
2547 bfd_vma addend;
2548
2549 /* Unlike other ELF targets, we use separate GOT entries for the same
2550 symbol referenced from different input files. This is to support
2551 automatic multiple TOC/GOT sections, where the TOC base can vary
2552 from one input file to another.
2553
2554 Point to the BFD owning this GOT entry. */
2555 bfd *owner;
2556
2557 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2558 TLS_TPREL or TLS_DTPREL for tls entries. */
2559 char tls_type;
2560
2561 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2562 union
2563 {
2564 bfd_signed_vma refcount;
2565 bfd_vma offset;
2566 } got;
2567 };
2568
2569 /* The same for PLT. */
2570 struct plt_entry
2571 {
2572 struct plt_entry *next;
2573
2574 bfd_vma addend;
2575
2576 union
2577 {
2578 bfd_signed_vma refcount;
2579 bfd_vma offset;
2580 } plt;
2581 };
2582
2583 /* Of those relocs that might be copied as dynamic relocs, this macro
2584 selects those that must be copied when linking a shared library,
2585 even when the symbol is local. */
2586
2587 #define MUST_BE_DYN_RELOC(RTYPE) \
2588 ((RTYPE) != R_PPC64_REL32 \
2589 && (RTYPE) != R_PPC64_REL64 \
2590 && (RTYPE) != R_PPC64_REL30)
2591
2592 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2593 copying dynamic variables from a shared lib into an app's dynbss
2594 section, and instead use a dynamic relocation to point into the
2595 shared lib. With code that gcc generates, it's vital that this be
2596 enabled; In the PowerPC64 ABI, the address of a function is actually
2597 the address of a function descriptor, which resides in the .opd
2598 section. gcc uses the descriptor directly rather than going via the
2599 GOT as some other ABI's do, which means that initialized function
2600 pointers must reference the descriptor. Thus, a function pointer
2601 initialized to the address of a function in a shared library will
2602 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2603 redefines the function desctriptor symbol to point to the copy. This
2604 presents a problem as a plt entry for that function is also
2605 initialized from the function descriptor symbol and the copy reloc
2606 may not be initialized first. */
2607 #define ELIMINATE_COPY_RELOCS 1
2608
2609 /* Section name for stubs is the associated section name plus this
2610 string. */
2611 #define STUB_SUFFIX ".stub"
2612
2613 /* Linker stubs.
2614 ppc_stub_long_branch:
2615 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2616 destination, but a 24 bit branch in a stub section will reach.
2617 . b dest
2618
2619 ppc_stub_plt_branch:
2620 Similar to the above, but a 24 bit branch in the stub section won't
2621 reach its destination.
2622 . addis %r12,%r2,xxx@toc@ha
2623 . ld %r11,xxx@toc@l(%r12)
2624 . mtctr %r11
2625 . bctr
2626
2627 ppc_stub_plt_call:
2628 Used to call a function in a shared library.
2629 . addis %r12,%r2,xxx@toc@ha
2630 . std %r2,40(%r1)
2631 . ld %r11,xxx+0@toc@l(%r12)
2632 . ld %r2,xxx+8@toc@l(%r12)
2633 . mtctr %r11
2634 . ld %r11,xxx+16@toc@l(%r12)
2635 . bctr
2636
2637 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2638 code to adjust the value and save r2 to support multiple toc sections.
2639 A ppc_stub_long_branch with an r2 offset looks like:
2640 . std %r2,40(%r1)
2641 . addis %r2,%r2,off@ha
2642 . addi %r2,%r2,off@l
2643 . b dest
2644
2645 A ppc_stub_plt_branch with an r2 offset looks like:
2646 . std %r2,40(%r1)
2647 . addis %r12,%r2,xxx@toc@ha
2648 . ld %r11,xxx@toc@l(%r12)
2649 . addis %r2,%r2,off@ha
2650 . addi %r2,%r2,off@l
2651 . mtctr %r11
2652 . bctr
2653 */
2654
2655 enum ppc_stub_type {
2656 ppc_stub_none,
2657 ppc_stub_long_branch,
2658 ppc_stub_long_branch_r2off,
2659 ppc_stub_plt_branch,
2660 ppc_stub_plt_branch_r2off,
2661 ppc_stub_plt_call
2662 };
2663
2664 struct ppc_stub_hash_entry {
2665
2666 /* Base hash table entry structure. */
2667 struct bfd_hash_entry root;
2668
2669 enum ppc_stub_type stub_type;
2670
2671 /* The stub section. */
2672 asection *stub_sec;
2673
2674 /* Offset within stub_sec of the beginning of this stub. */
2675 bfd_vma stub_offset;
2676
2677 /* Given the symbol's value and its section we can determine its final
2678 value when building the stubs (so the stub knows where to jump. */
2679 bfd_vma target_value;
2680 asection *target_section;
2681
2682 /* The symbol table entry, if any, that this was derived from. */
2683 struct ppc_link_hash_entry *h;
2684
2685 /* And the reloc addend that this was derived from. */
2686 bfd_vma addend;
2687
2688 /* Where this stub is being called from, or, in the case of combined
2689 stub sections, the first input section in the group. */
2690 asection *id_sec;
2691 };
2692
2693 struct ppc_branch_hash_entry {
2694
2695 /* Base hash table entry structure. */
2696 struct bfd_hash_entry root;
2697
2698 /* Offset within .branch_lt. */
2699 unsigned int offset;
2700
2701 /* Generation marker. */
2702 unsigned int iter;
2703 };
2704
2705 struct ppc_link_hash_entry
2706 {
2707 struct elf_link_hash_entry elf;
2708
2709 /* A pointer to the most recently used stub hash entry against this
2710 symbol. */
2711 struct ppc_stub_hash_entry *stub_cache;
2712
2713 /* Track dynamic relocs copied for this symbol. */
2714 struct ppc_dyn_relocs *dyn_relocs;
2715
2716 /* Link between function code and descriptor symbols. */
2717 struct elf_link_hash_entry *oh;
2718
2719 /* Flag function code and descriptor symbols. */
2720 unsigned int is_func:1;
2721 unsigned int is_func_descriptor:1;
2722 unsigned int is_entry:1;
2723
2724 /* Contexts in which symbol is used in the GOT (or TOC).
2725 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2726 corresponding relocs are encountered during check_relocs.
2727 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2728 indicate the corresponding GOT entry type is not needed.
2729 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2730 a TPREL one. We use a separate flag rather than setting TPREL
2731 just for convenience in distinguishing the two cases. */
2732 #define TLS_GD 1 /* GD reloc. */
2733 #define TLS_LD 2 /* LD reloc. */
2734 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2735 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2736 #define TLS_TLS 16 /* Any TLS reloc. */
2737 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2738 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2739 char tls_mask;
2740 };
2741
2742 /* ppc64 ELF linker hash table. */
2743
2744 struct ppc_link_hash_table
2745 {
2746 struct elf_link_hash_table elf;
2747
2748 /* The stub hash table. */
2749 struct bfd_hash_table stub_hash_table;
2750
2751 /* Another hash table for plt_branch stubs. */
2752 struct bfd_hash_table branch_hash_table;
2753
2754 /* Linker stub bfd. */
2755 bfd *stub_bfd;
2756
2757 /* Linker call-backs. */
2758 asection * (*add_stub_section) (const char *, asection *);
2759 void (*layout_sections_again) (void);
2760
2761 /* Array to keep track of which stub sections have been created, and
2762 information on stub grouping. */
2763 struct map_stub {
2764 /* This is the section to which stubs in the group will be attached. */
2765 asection *link_sec;
2766 /* The stub section. */
2767 asection *stub_sec;
2768 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2769 bfd_vma toc_off;
2770 } *stub_group;
2771
2772 /* Support for multiple toc sections. */
2773 unsigned int no_multi_toc;
2774 unsigned int multi_toc_needed;
2775
2776 /* Temp used when calculating TOC pointers. */
2777 bfd_vma toc_curr;
2778
2779 /* Highest input section id. */
2780 int top_id;
2781
2782 /* Highest output section index. */
2783 int top_index;
2784
2785 /* List of input sections for each output section. */
2786 asection **input_list;
2787
2788 /* Short-cuts to get to dynamic linker sections. */
2789 asection *got;
2790 asection *plt;
2791 asection *relplt;
2792 asection *dynbss;
2793 asection *relbss;
2794 asection *glink;
2795 asection *sfpr;
2796 asection *brlt;
2797 asection *relbrlt;
2798
2799 /* Short-cut to first output tls section. */
2800 asection *tls_sec;
2801
2802 /* Shortcut to .__tls_get_addr. */
2803 struct elf_link_hash_entry *tls_get_addr;
2804
2805 /* Statistics. */
2806 unsigned long stub_count[ppc_stub_plt_call];
2807
2808 /* Set if we should emit symbols for stubs. */
2809 unsigned int emit_stub_syms;
2810
2811 /* Set on error. */
2812 unsigned int stub_error;
2813
2814 /* Flag set when small branches are detected. Used to
2815 select suitable defaults for the stub group size. */
2816 unsigned int has_14bit_branch;
2817
2818 /* Set if we detect a reference undefined weak symbol. */
2819 unsigned int have_undefweak;
2820
2821 /* Incremented every time we size stubs. */
2822 unsigned int stub_iteration;
2823
2824 /* Small local sym to section mapping cache. */
2825 struct sym_sec_cache sym_sec;
2826 };
2827
2828 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2829
2830 #define ppc_hash_table(p) \
2831 ((struct ppc_link_hash_table *) ((p)->hash))
2832
2833 #define ppc_stub_hash_lookup(table, string, create, copy) \
2834 ((struct ppc_stub_hash_entry *) \
2835 bfd_hash_lookup ((table), (string), (create), (copy)))
2836
2837 #define ppc_branch_hash_lookup(table, string, create, copy) \
2838 ((struct ppc_branch_hash_entry *) \
2839 bfd_hash_lookup ((table), (string), (create), (copy)))
2840
2841 /* Create an entry in the stub hash table. */
2842
2843 static struct bfd_hash_entry *
2844 stub_hash_newfunc (struct bfd_hash_entry *entry,
2845 struct bfd_hash_table *table,
2846 const char *string)
2847 {
2848 /* Allocate the structure if it has not already been allocated by a
2849 subclass. */
2850 if (entry == NULL)
2851 {
2852 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2853 if (entry == NULL)
2854 return entry;
2855 }
2856
2857 /* Call the allocation method of the superclass. */
2858 entry = bfd_hash_newfunc (entry, table, string);
2859 if (entry != NULL)
2860 {
2861 struct ppc_stub_hash_entry *eh;
2862
2863 /* Initialize the local fields. */
2864 eh = (struct ppc_stub_hash_entry *) entry;
2865 eh->stub_type = ppc_stub_none;
2866 eh->stub_sec = NULL;
2867 eh->stub_offset = 0;
2868 eh->target_value = 0;
2869 eh->target_section = NULL;
2870 eh->h = NULL;
2871 eh->id_sec = NULL;
2872 }
2873
2874 return entry;
2875 }
2876
2877 /* Create an entry in the branch hash table. */
2878
2879 static struct bfd_hash_entry *
2880 branch_hash_newfunc (struct bfd_hash_entry *entry,
2881 struct bfd_hash_table *table,
2882 const char *string)
2883 {
2884 /* Allocate the structure if it has not already been allocated by a
2885 subclass. */
2886 if (entry == NULL)
2887 {
2888 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2889 if (entry == NULL)
2890 return entry;
2891 }
2892
2893 /* Call the allocation method of the superclass. */
2894 entry = bfd_hash_newfunc (entry, table, string);
2895 if (entry != NULL)
2896 {
2897 struct ppc_branch_hash_entry *eh;
2898
2899 /* Initialize the local fields. */
2900 eh = (struct ppc_branch_hash_entry *) entry;
2901 eh->offset = 0;
2902 eh->iter = 0;
2903 }
2904
2905 return entry;
2906 }
2907
2908 /* Create an entry in a ppc64 ELF linker hash table. */
2909
2910 static struct bfd_hash_entry *
2911 link_hash_newfunc (struct bfd_hash_entry *entry,
2912 struct bfd_hash_table *table,
2913 const char *string)
2914 {
2915 /* Allocate the structure if it has not already been allocated by a
2916 subclass. */
2917 if (entry == NULL)
2918 {
2919 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2920 if (entry == NULL)
2921 return entry;
2922 }
2923
2924 /* Call the allocation method of the superclass. */
2925 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2926 if (entry != NULL)
2927 {
2928 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2929
2930 eh->stub_cache = NULL;
2931 eh->dyn_relocs = NULL;
2932 eh->oh = NULL;
2933 eh->is_func = 0;
2934 eh->is_func_descriptor = 0;
2935 eh->is_entry = 0;
2936 eh->tls_mask = 0;
2937 }
2938
2939 return entry;
2940 }
2941
2942 /* Create a ppc64 ELF linker hash table. */
2943
2944 static struct bfd_link_hash_table *
2945 ppc64_elf_link_hash_table_create (bfd *abfd)
2946 {
2947 struct ppc_link_hash_table *htab;
2948 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2949
2950 htab = bfd_zmalloc (amt);
2951 if (htab == NULL)
2952 return NULL;
2953
2954 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2955 {
2956 free (htab);
2957 return NULL;
2958 }
2959
2960 /* Init the stub hash table too. */
2961 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
2962 return NULL;
2963
2964 /* And the branch hash table. */
2965 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
2966 return NULL;
2967
2968 /* Initializing two fields of the union is just cosmetic. We really
2969 only care about glist, but when compiled on a 32-bit host the
2970 bfd_vma fields are larger. Setting the bfd_vma to zero makes
2971 debugger inspection of these fields look nicer. */
2972 htab->elf.init_refcount.refcount = 0;
2973 htab->elf.init_refcount.glist = NULL;
2974 htab->elf.init_offset.offset = 0;
2975 htab->elf.init_offset.glist = NULL;
2976
2977 return &htab->elf.root;
2978 }
2979
2980 /* Free the derived linker hash table. */
2981
2982 static void
2983 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
2984 {
2985 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
2986
2987 bfd_hash_table_free (&ret->stub_hash_table);
2988 bfd_hash_table_free (&ret->branch_hash_table);
2989 _bfd_generic_link_hash_table_free (hash);
2990 }
2991
2992 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
2993
2994 void
2995 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
2996 {
2997 struct ppc_link_hash_table *htab;
2998
2999 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3000
3001 /* Always hook our dynamic sections into the first bfd, which is the
3002 linker created stub bfd. This ensures that the GOT header is at
3003 the start of the output TOC section. */
3004 htab = ppc_hash_table (info);
3005 htab->stub_bfd = abfd;
3006 htab->elf.dynobj = abfd;
3007 }
3008
3009 /* Build a name for an entry in the stub hash table. */
3010
3011 static char *
3012 ppc_stub_name (const asection *input_section,
3013 const asection *sym_sec,
3014 const struct ppc_link_hash_entry *h,
3015 const Elf_Internal_Rela *rel)
3016 {
3017 char *stub_name;
3018 bfd_size_type len;
3019
3020 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3021 offsets from a sym as a branch target? In fact, we could
3022 probably assume the addend is always zero. */
3023 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3024
3025 if (h)
3026 {
3027 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3028 stub_name = bfd_malloc (len);
3029 if (stub_name != NULL)
3030 {
3031 sprintf (stub_name, "%08x.%s+%x",
3032 input_section->id & 0xffffffff,
3033 h->elf.root.root.string,
3034 (int) rel->r_addend & 0xffffffff);
3035 }
3036 }
3037 else
3038 {
3039 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3040 stub_name = bfd_malloc (len);
3041 if (stub_name != NULL)
3042 {
3043 sprintf (stub_name, "%08x.%x:%x+%x",
3044 input_section->id & 0xffffffff,
3045 sym_sec->id & 0xffffffff,
3046 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3047 (int) rel->r_addend & 0xffffffff);
3048 }
3049 }
3050 return stub_name;
3051 }
3052
3053 /* Look up an entry in the stub hash. Stub entries are cached because
3054 creating the stub name takes a bit of time. */
3055
3056 static struct ppc_stub_hash_entry *
3057 ppc_get_stub_entry (const asection *input_section,
3058 const asection *sym_sec,
3059 struct elf_link_hash_entry *hash,
3060 const Elf_Internal_Rela *rel,
3061 struct ppc_link_hash_table *htab)
3062 {
3063 struct ppc_stub_hash_entry *stub_entry;
3064 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3065 const asection *id_sec;
3066
3067 /* If this input section is part of a group of sections sharing one
3068 stub section, then use the id of the first section in the group.
3069 Stub names need to include a section id, as there may well be
3070 more than one stub used to reach say, printf, and we need to
3071 distinguish between them. */
3072 id_sec = htab->stub_group[input_section->id].link_sec;
3073
3074 if (h != NULL && h->stub_cache != NULL
3075 && h->stub_cache->h == h
3076 && h->stub_cache->id_sec == id_sec)
3077 {
3078 stub_entry = h->stub_cache;
3079 }
3080 else
3081 {
3082 char *stub_name;
3083
3084 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3085 if (stub_name == NULL)
3086 return NULL;
3087
3088 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3089 stub_name, FALSE, FALSE);
3090 if (h != NULL)
3091 h->stub_cache = stub_entry;
3092
3093 free (stub_name);
3094 }
3095
3096 return stub_entry;
3097 }
3098
3099 /* Add a new stub entry to the stub hash. Not all fields of the new
3100 stub entry are initialised. */
3101
3102 static struct ppc_stub_hash_entry *
3103 ppc_add_stub (const char *stub_name,
3104 asection *section,
3105 struct ppc_link_hash_table *htab)
3106 {
3107 asection *link_sec;
3108 asection *stub_sec;
3109 struct ppc_stub_hash_entry *stub_entry;
3110
3111 link_sec = htab->stub_group[section->id].link_sec;
3112 stub_sec = htab->stub_group[section->id].stub_sec;
3113 if (stub_sec == NULL)
3114 {
3115 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3116 if (stub_sec == NULL)
3117 {
3118 size_t namelen;
3119 bfd_size_type len;
3120 char *s_name;
3121
3122 namelen = strlen (link_sec->name);
3123 len = namelen + sizeof (STUB_SUFFIX);
3124 s_name = bfd_alloc (htab->stub_bfd, len);
3125 if (s_name == NULL)
3126 return NULL;
3127
3128 memcpy (s_name, link_sec->name, namelen);
3129 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3130 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3131 if (stub_sec == NULL)
3132 return NULL;
3133 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3134 }
3135 htab->stub_group[section->id].stub_sec = stub_sec;
3136 }
3137
3138 /* Enter this entry into the linker stub hash table. */
3139 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3140 TRUE, FALSE);
3141 if (stub_entry == NULL)
3142 {
3143 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3144 bfd_archive_filename (section->owner),
3145 stub_name);
3146 return NULL;
3147 }
3148
3149 stub_entry->stub_sec = stub_sec;
3150 stub_entry->stub_offset = 0;
3151 stub_entry->id_sec = link_sec;
3152 return stub_entry;
3153 }
3154
3155 /* Create sections for linker generated code. */
3156
3157 static bfd_boolean
3158 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3159 {
3160 struct ppc_link_hash_table *htab;
3161 flagword flags;
3162
3163 htab = ppc_hash_table (info);
3164
3165 /* Create .sfpr for code to save and restore fp regs. */
3166 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3167 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3168 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3169 if (htab->sfpr == NULL
3170 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3171 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3172 return FALSE;
3173
3174 /* Create .glink for lazy dynamic linking support. */
3175 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3176 if (htab->glink == NULL
3177 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3178 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3179 return FALSE;
3180
3181 /* Create .branch_lt for plt_branch stubs. */
3182 flags = (SEC_ALLOC | SEC_LOAD
3183 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3184 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3185 if (htab->brlt == NULL
3186 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3187 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3188 return FALSE;
3189
3190 if (info->shared)
3191 {
3192 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3193 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3194 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3195 if (!htab->relbrlt
3196 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3197 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3198 return FALSE;
3199 }
3200 return TRUE;
3201 }
3202
3203 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3204 not already done. */
3205
3206 static bfd_boolean
3207 create_got_section (bfd *abfd, struct bfd_link_info *info)
3208 {
3209 asection *got, *relgot;
3210 flagword flags;
3211 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3212
3213 if (!htab->got)
3214 {
3215 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3216 return FALSE;
3217
3218 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3219 if (!htab->got)
3220 abort ();
3221 }
3222
3223 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3224 | SEC_LINKER_CREATED);
3225
3226 got = bfd_make_section (abfd, ".got");
3227 if (!got
3228 || !bfd_set_section_flags (abfd, got, flags)
3229 || !bfd_set_section_alignment (abfd, got, 3))
3230 return FALSE;
3231
3232 relgot = bfd_make_section (abfd, ".rela.got");
3233 if (!relgot
3234 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3235 || ! bfd_set_section_alignment (abfd, relgot, 3))
3236 return FALSE;
3237
3238 ppc64_elf_tdata (abfd)->got = got;
3239 ppc64_elf_tdata (abfd)->relgot = relgot;
3240 return TRUE;
3241 }
3242
3243 /* Create the dynamic sections, and set up shortcuts. */
3244
3245 static bfd_boolean
3246 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3247 {
3248 struct ppc_link_hash_table *htab;
3249
3250 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3251 return FALSE;
3252
3253 htab = ppc_hash_table (info);
3254 if (!htab->got)
3255 htab->got = bfd_get_section_by_name (dynobj, ".got");
3256 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3257 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3258 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3259 if (!info->shared)
3260 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3261
3262 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3263 || (!info->shared && !htab->relbss))
3264 abort ();
3265
3266 return TRUE;
3267 }
3268
3269 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3270
3271 static void
3272 ppc64_elf_copy_indirect_symbol
3273 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3274 struct elf_link_hash_entry *dir,
3275 struct elf_link_hash_entry *ind)
3276 {
3277 struct ppc_link_hash_entry *edir, *eind;
3278 flagword mask;
3279
3280 edir = (struct ppc_link_hash_entry *) dir;
3281 eind = (struct ppc_link_hash_entry *) ind;
3282
3283 /* Copy over any dynamic relocs we may have on the indirect sym. */
3284 if (eind->dyn_relocs != NULL)
3285 {
3286 if (edir->dyn_relocs != NULL)
3287 {
3288 struct ppc_dyn_relocs **pp;
3289 struct ppc_dyn_relocs *p;
3290
3291 if (eind->elf.root.type == bfd_link_hash_indirect)
3292 abort ();
3293
3294 /* Add reloc counts against the weak sym to the strong sym
3295 list. Merge any entries against the same section. */
3296 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3297 {
3298 struct ppc_dyn_relocs *q;
3299
3300 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3301 if (q->sec == p->sec)
3302 {
3303 q->pc_count += p->pc_count;
3304 q->count += p->count;
3305 *pp = p->next;
3306 break;
3307 }
3308 if (q == NULL)
3309 pp = &p->next;
3310 }
3311 *pp = edir->dyn_relocs;
3312 }
3313
3314 edir->dyn_relocs = eind->dyn_relocs;
3315 eind->dyn_relocs = NULL;
3316 }
3317
3318 edir->is_func |= eind->is_func;
3319 edir->is_func_descriptor |= eind->is_func_descriptor;
3320 edir->is_entry |= eind->is_entry;
3321 edir->tls_mask |= eind->tls_mask;
3322
3323 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3324 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF);
3325 /* If called to transfer flags for a weakdef during processing
3326 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3327 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3328 if (ELIMINATE_COPY_RELOCS
3329 && eind->elf.root.type != bfd_link_hash_indirect
3330 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3331 mask &= ~ELF_LINK_NON_GOT_REF;
3332
3333 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3334
3335 /* If we were called to copy over info for a weak sym, that's all. */
3336 if (eind->elf.root.type != bfd_link_hash_indirect)
3337 return;
3338
3339 /* Copy over got entries that we may have already seen to the
3340 symbol which just became indirect. */
3341 if (eind->elf.got.glist != NULL)
3342 {
3343 if (edir->elf.got.glist != NULL)
3344 {
3345 struct got_entry **entp;
3346 struct got_entry *ent;
3347
3348 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3349 {
3350 struct got_entry *dent;
3351
3352 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3353 if (dent->addend == ent->addend
3354 && dent->owner == ent->owner
3355 && dent->tls_type == ent->tls_type)
3356 {
3357 dent->got.refcount += ent->got.refcount;
3358 *entp = ent->next;
3359 break;
3360 }
3361 if (dent == NULL)
3362 entp = &ent->next;
3363 }
3364 *entp = edir->elf.got.glist;
3365 }
3366
3367 edir->elf.got.glist = eind->elf.got.glist;
3368 eind->elf.got.glist = NULL;
3369 }
3370
3371 /* And plt entries. */
3372 if (eind->elf.plt.plist != NULL)
3373 {
3374 if (edir->elf.plt.plist != NULL)
3375 {
3376 struct plt_entry **entp;
3377 struct plt_entry *ent;
3378
3379 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3380 {
3381 struct plt_entry *dent;
3382
3383 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3384 if (dent->addend == ent->addend)
3385 {
3386 dent->plt.refcount += ent->plt.refcount;
3387 *entp = ent->next;
3388 break;
3389 }
3390 if (dent == NULL)
3391 entp = &ent->next;
3392 }
3393 *entp = edir->elf.plt.plist;
3394 }
3395
3396 edir->elf.plt.plist = eind->elf.plt.plist;
3397 eind->elf.plt.plist = NULL;
3398 }
3399
3400 if (edir->elf.dynindx == -1)
3401 {
3402 edir->elf.dynindx = eind->elf.dynindx;
3403 edir->elf.dynstr_index = eind->elf.dynstr_index;
3404 eind->elf.dynindx = -1;
3405 eind->elf.dynstr_index = 0;
3406 }
3407 else
3408 BFD_ASSERT (eind->elf.dynindx == -1);
3409 }
3410
3411 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3412 symbols undefined on the command-line. */
3413
3414 bfd_boolean
3415 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3416 {
3417 struct ppc_link_hash_table *htab;
3418 struct bfd_sym_chain *sym;
3419
3420 htab = ppc_hash_table (info);
3421 for (sym = info->gc_sym_list; sym; sym = sym->next)
3422 {
3423 struct elf_link_hash_entry *h;
3424
3425 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3426 if (h != NULL)
3427 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3428 }
3429 return TRUE;
3430 }
3431
3432 static bfd_boolean
3433 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3434 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3435 {
3436 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3437 char *local_got_tls_masks;
3438
3439 if (local_got_ents == NULL)
3440 {
3441 bfd_size_type size = symtab_hdr->sh_info;
3442
3443 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3444 local_got_ents = bfd_zalloc (abfd, size);
3445 if (local_got_ents == NULL)
3446 return FALSE;
3447 elf_local_got_ents (abfd) = local_got_ents;
3448 }
3449
3450 if ((tls_type & TLS_EXPLICIT) == 0)
3451 {
3452 struct got_entry *ent;
3453
3454 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3455 if (ent->addend == r_addend
3456 && ent->owner == abfd
3457 && ent->tls_type == tls_type)
3458 break;
3459 if (ent == NULL)
3460 {
3461 bfd_size_type amt = sizeof (*ent);
3462 ent = bfd_alloc (abfd, amt);
3463 if (ent == NULL)
3464 return FALSE;
3465 ent->next = local_got_ents[r_symndx];
3466 ent->addend = r_addend;
3467 ent->owner = abfd;
3468 ent->tls_type = tls_type;
3469 ent->got.refcount = 0;
3470 local_got_ents[r_symndx] = ent;
3471 }
3472 ent->got.refcount += 1;
3473 }
3474
3475 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3476 local_got_tls_masks[r_symndx] |= tls_type;
3477 return TRUE;
3478 }
3479
3480 static bfd_boolean
3481 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3482 {
3483 struct plt_entry *ent;
3484
3485 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3486 if (ent->addend == addend)
3487 break;
3488 if (ent == NULL)
3489 {
3490 bfd_size_type amt = sizeof (*ent);
3491 ent = bfd_alloc (abfd, amt);
3492 if (ent == NULL)
3493 return FALSE;
3494 ent->next = eh->elf.plt.plist;
3495 ent->addend = addend;
3496 ent->plt.refcount = 0;
3497 eh->elf.plt.plist = ent;
3498 }
3499 ent->plt.refcount += 1;
3500 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3501 eh->is_func = 1;
3502 return TRUE;
3503 }
3504
3505 /* Find the function descriptor hash entry from the given function code
3506 hash entry FH. Link the entries via their OH fields. */
3507 static struct ppc_link_hash_entry *
3508 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3509 {
3510 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3511
3512 if (fdh == NULL)
3513 {
3514 const char *fd_name = fh->elf.root.root.string + 1;
3515
3516 fdh = (struct ppc_link_hash_entry *)
3517 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3518 if (fdh != NULL)
3519 {
3520 fdh->is_func_descriptor = 1;
3521 fdh->oh = &fh->elf;
3522 fh->is_func = 1;
3523 fh->oh = &fdh->elf;
3524 }
3525 }
3526
3527 return fdh;
3528 }
3529
3530 /* Look through the relocs for a section during the first phase, and
3531 calculate needed space in the global offset table, procedure
3532 linkage table, and dynamic reloc sections. */
3533
3534 static bfd_boolean
3535 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3536 asection *sec, const Elf_Internal_Rela *relocs)
3537 {
3538 struct ppc_link_hash_table *htab;
3539 Elf_Internal_Shdr *symtab_hdr;
3540 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3541 const Elf_Internal_Rela *rel;
3542 const Elf_Internal_Rela *rel_end;
3543 asection *sreloc;
3544 asection **opd_sym_map;
3545
3546 if (info->relocatable)
3547 return TRUE;
3548
3549 htab = ppc_hash_table (info);
3550 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3551
3552 sym_hashes = elf_sym_hashes (abfd);
3553 sym_hashes_end = (sym_hashes
3554 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3555 - symtab_hdr->sh_info);
3556
3557 sreloc = NULL;
3558 opd_sym_map = NULL;
3559 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3560 {
3561 /* Garbage collection needs some extra help with .opd sections.
3562 We don't want to necessarily keep everything referenced by
3563 relocs in .opd, as that would keep all functions. Instead,
3564 if we reference an .opd symbol (a function descriptor), we
3565 want to keep the function code symbol's section. This is
3566 easy for global symbols, but for local syms we need to keep
3567 information about the associated function section. Later, if
3568 edit_opd deletes entries, we'll use this array to adjust
3569 local syms in .opd. */
3570 union opd_info {
3571 asection *func_section;
3572 long entry_adjust;
3573 };
3574 bfd_size_type amt;
3575
3576 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3577 opd_sym_map = bfd_zalloc (abfd, amt);
3578 if (opd_sym_map == NULL)
3579 return FALSE;
3580 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3581 }
3582
3583 if (htab->sfpr == NULL
3584 && !create_linkage_sections (htab->elf.dynobj, info))
3585 return FALSE;
3586
3587 rel_end = relocs + sec->reloc_count;
3588 for (rel = relocs; rel < rel_end; rel++)
3589 {
3590 unsigned long r_symndx;
3591 struct elf_link_hash_entry *h;
3592 enum elf_ppc64_reloc_type r_type;
3593 int tls_type = 0;
3594
3595 r_symndx = ELF64_R_SYM (rel->r_info);
3596 if (r_symndx < symtab_hdr->sh_info)
3597 h = NULL;
3598 else
3599 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3600
3601 r_type = ELF64_R_TYPE (rel->r_info);
3602 switch (r_type)
3603 {
3604 case R_PPC64_GOT_TLSLD16:
3605 case R_PPC64_GOT_TLSLD16_LO:
3606 case R_PPC64_GOT_TLSLD16_HI:
3607 case R_PPC64_GOT_TLSLD16_HA:
3608 ppc64_tlsld_got (abfd)->refcount += 1;
3609 tls_type = TLS_TLS | TLS_LD;
3610 goto dogottls;
3611
3612 case R_PPC64_GOT_TLSGD16:
3613 case R_PPC64_GOT_TLSGD16_LO:
3614 case R_PPC64_GOT_TLSGD16_HI:
3615 case R_PPC64_GOT_TLSGD16_HA:
3616 tls_type = TLS_TLS | TLS_GD;
3617 goto dogottls;
3618
3619 case R_PPC64_GOT_TPREL16_DS:
3620 case R_PPC64_GOT_TPREL16_LO_DS:
3621 case R_PPC64_GOT_TPREL16_HI:
3622 case R_PPC64_GOT_TPREL16_HA:
3623 if (info->shared)
3624 info->flags |= DF_STATIC_TLS;
3625 tls_type = TLS_TLS | TLS_TPREL;
3626 goto dogottls;
3627
3628 case R_PPC64_GOT_DTPREL16_DS:
3629 case R_PPC64_GOT_DTPREL16_LO_DS:
3630 case R_PPC64_GOT_DTPREL16_HI:
3631 case R_PPC64_GOT_DTPREL16_HA:
3632 tls_type = TLS_TLS | TLS_DTPREL;
3633 dogottls:
3634 sec->has_tls_reloc = 1;
3635 /* Fall thru */
3636
3637 case R_PPC64_GOT16:
3638 case R_PPC64_GOT16_DS:
3639 case R_PPC64_GOT16_HA:
3640 case R_PPC64_GOT16_HI:
3641 case R_PPC64_GOT16_LO:
3642 case R_PPC64_GOT16_LO_DS:
3643 /* This symbol requires a global offset table entry. */
3644 sec->has_gp_reloc = 1;
3645 if (ppc64_elf_tdata (abfd)->got == NULL
3646 && !create_got_section (abfd, info))
3647 return FALSE;
3648
3649 if (h != NULL)
3650 {
3651 struct ppc_link_hash_entry *eh;
3652 struct got_entry *ent;
3653
3654 eh = (struct ppc_link_hash_entry *) h;
3655 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3656 if (ent->addend == rel->r_addend
3657 && ent->owner == abfd
3658 && ent->tls_type == tls_type)
3659 break;
3660 if (ent == NULL)
3661 {
3662 bfd_size_type amt = sizeof (*ent);
3663 ent = bfd_alloc (abfd, amt);
3664 if (ent == NULL)
3665 return FALSE;
3666 ent->next = eh->elf.got.glist;
3667 ent->addend = rel->r_addend;
3668 ent->owner = abfd;
3669 ent->tls_type = tls_type;
3670 ent->got.refcount = 0;
3671 eh->elf.got.glist = ent;
3672 }
3673 ent->got.refcount += 1;
3674 eh->tls_mask |= tls_type;
3675 }
3676 else
3677 /* This is a global offset table entry for a local symbol. */
3678 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3679 rel->r_addend, tls_type))
3680 return FALSE;
3681 break;
3682
3683 case R_PPC64_PLT16_HA:
3684 case R_PPC64_PLT16_HI:
3685 case R_PPC64_PLT16_LO:
3686 case R_PPC64_PLT32:
3687 case R_PPC64_PLT64:
3688 /* This symbol requires a procedure linkage table entry. We
3689 actually build the entry in adjust_dynamic_symbol,
3690 because this might be a case of linking PIC code without
3691 linking in any dynamic objects, in which case we don't
3692 need to generate a procedure linkage table after all. */
3693 if (h == NULL)
3694 {
3695 /* It does not make sense to have a procedure linkage
3696 table entry for a local symbol. */
3697 bfd_set_error (bfd_error_bad_value);
3698 return FALSE;
3699 }
3700 else
3701 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3702 rel->r_addend))
3703 return FALSE;
3704 break;
3705
3706 /* The following relocations don't need to propagate the
3707 relocation if linking a shared object since they are
3708 section relative. */
3709 case R_PPC64_SECTOFF:
3710 case R_PPC64_SECTOFF_LO:
3711 case R_PPC64_SECTOFF_HI:
3712 case R_PPC64_SECTOFF_HA:
3713 case R_PPC64_SECTOFF_DS:
3714 case R_PPC64_SECTOFF_LO_DS:
3715 case R_PPC64_DTPREL16:
3716 case R_PPC64_DTPREL16_LO:
3717 case R_PPC64_DTPREL16_HI:
3718 case R_PPC64_DTPREL16_HA:
3719 case R_PPC64_DTPREL16_DS:
3720 case R_PPC64_DTPREL16_LO_DS:
3721 case R_PPC64_DTPREL16_HIGHER:
3722 case R_PPC64_DTPREL16_HIGHERA:
3723 case R_PPC64_DTPREL16_HIGHEST:
3724 case R_PPC64_DTPREL16_HIGHESTA:
3725 break;
3726
3727 /* Nor do these. */
3728 case R_PPC64_TOC16:
3729 case R_PPC64_TOC16_LO:
3730 case R_PPC64_TOC16_HI:
3731 case R_PPC64_TOC16_HA:
3732 case R_PPC64_TOC16_DS:
3733 case R_PPC64_TOC16_LO_DS:
3734 sec->has_gp_reloc = 1;
3735 break;
3736
3737 /* This relocation describes the C++ object vtable hierarchy.
3738 Reconstruct it for later use during GC. */
3739 case R_PPC64_GNU_VTINHERIT:
3740 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3741 return FALSE;
3742 break;
3743
3744 /* This relocation describes which C++ vtable entries are actually
3745 used. Record for later use during GC. */
3746 case R_PPC64_GNU_VTENTRY:
3747 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3748 return FALSE;
3749 break;
3750
3751 case R_PPC64_REL14:
3752 case R_PPC64_REL14_BRTAKEN:
3753 case R_PPC64_REL14_BRNTAKEN:
3754 htab->has_14bit_branch = 1;
3755 /* Fall through. */
3756
3757 case R_PPC64_REL24:
3758 if (h != NULL
3759 && h->root.root.string[0] == '.'
3760 && h->root.root.string[1] != 0)
3761 {
3762 /* We may need a .plt entry if the function this reloc
3763 refers to is in a shared lib. */
3764 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3765 rel->r_addend))
3766 return FALSE;
3767 if (h == htab->tls_get_addr)
3768 sec->has_tls_reloc = 1;
3769 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3770 == 0)
3771 && (h->root.root.string[15] == 0
3772 || h->root.root.string[15] == '@'))
3773 {
3774 htab->tls_get_addr = h;
3775 sec->has_tls_reloc = 1;
3776 }
3777 }
3778 break;
3779
3780 case R_PPC64_TPREL64:
3781 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3782 if (info->shared)
3783 info->flags |= DF_STATIC_TLS;
3784 goto dotlstoc;
3785
3786 case R_PPC64_DTPMOD64:
3787 if (rel + 1 < rel_end
3788 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3789 && rel[1].r_offset == rel->r_offset + 8)
3790 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3791 else
3792 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3793 goto dotlstoc;
3794
3795 case R_PPC64_DTPREL64:
3796 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3797 if (rel != relocs
3798 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3799 && rel[-1].r_offset == rel->r_offset - 8)
3800 /* This is the second reloc of a dtpmod, dtprel pair.
3801 Don't mark with TLS_DTPREL. */
3802 goto dodyn;
3803
3804 dotlstoc:
3805 sec->has_tls_reloc = 1;
3806 if (h != NULL)
3807 {
3808 struct ppc_link_hash_entry *eh;
3809 eh = (struct ppc_link_hash_entry *) h;
3810 eh->tls_mask |= tls_type;
3811 }
3812 else
3813 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3814 rel->r_addend, tls_type))
3815 return FALSE;
3816
3817 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3818 {
3819 /* One extra to simplify get_tls_mask. */
3820 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3821 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3822 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3823 return FALSE;
3824 }
3825 BFD_ASSERT (rel->r_offset % 8 == 0);
3826 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3827
3828 /* Mark the second slot of a GD or LD entry.
3829 -1 to indicate GD and -2 to indicate LD. */
3830 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3831 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3832 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3833 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3834 goto dodyn;
3835
3836 case R_PPC64_TPREL16:
3837 case R_PPC64_TPREL16_LO:
3838 case R_PPC64_TPREL16_HI:
3839 case R_PPC64_TPREL16_HA:
3840 case R_PPC64_TPREL16_DS:
3841 case R_PPC64_TPREL16_LO_DS:
3842 case R_PPC64_TPREL16_HIGHER:
3843 case R_PPC64_TPREL16_HIGHERA:
3844 case R_PPC64_TPREL16_HIGHEST:
3845 case R_PPC64_TPREL16_HIGHESTA:
3846 if (info->shared)
3847 {
3848 info->flags |= DF_STATIC_TLS;
3849 goto dodyn;
3850 }
3851 break;
3852
3853 case R_PPC64_ADDR64:
3854 if (opd_sym_map != NULL
3855 && h != NULL
3856 && h->root.root.string[0] == '.'
3857 && h->root.root.string[1] != 0)
3858 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3859
3860 if (opd_sym_map != NULL
3861 && h == NULL
3862 && rel + 1 < rel_end
3863 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3864 {
3865 asection *s;
3866
3867 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3868 r_symndx);
3869 if (s == NULL)
3870 return FALSE;
3871 else if (s != sec)
3872 opd_sym_map[rel->r_offset / 24] = s;
3873 }
3874 /* Fall through. */
3875
3876 case R_PPC64_REL30:
3877 case R_PPC64_REL32:
3878 case R_PPC64_REL64:
3879 case R_PPC64_ADDR14:
3880 case R_PPC64_ADDR14_BRNTAKEN:
3881 case R_PPC64_ADDR14_BRTAKEN:
3882 case R_PPC64_ADDR16:
3883 case R_PPC64_ADDR16_DS:
3884 case R_PPC64_ADDR16_HA:
3885 case R_PPC64_ADDR16_HI:
3886 case R_PPC64_ADDR16_HIGHER:
3887 case R_PPC64_ADDR16_HIGHERA:
3888 case R_PPC64_ADDR16_HIGHEST:
3889 case R_PPC64_ADDR16_HIGHESTA:
3890 case R_PPC64_ADDR16_LO:
3891 case R_PPC64_ADDR16_LO_DS:
3892 case R_PPC64_ADDR24:
3893 case R_PPC64_ADDR32:
3894 case R_PPC64_UADDR16:
3895 case R_PPC64_UADDR32:
3896 case R_PPC64_UADDR64:
3897 case R_PPC64_TOC:
3898 if (h != NULL && !info->shared)
3899 /* We may need a copy reloc. */
3900 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3901
3902 /* Don't propagate .opd relocs. */
3903 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3904 break;
3905
3906 /* Don't propagate relocs that the dynamic linker won't relocate. */
3907 if ((sec->flags & SEC_ALLOC) == 0)
3908 break;
3909
3910 /* If we are creating a shared library, and this is a reloc
3911 against a global symbol, or a non PC relative reloc
3912 against a local symbol, then we need to copy the reloc
3913 into the shared library. However, if we are linking with
3914 -Bsymbolic, we do not need to copy a reloc against a
3915 global symbol which is defined in an object we are
3916 including in the link (i.e., DEF_REGULAR is set). At
3917 this point we have not seen all the input files, so it is
3918 possible that DEF_REGULAR is not set now but will be set
3919 later (it is never cleared). In case of a weak definition,
3920 DEF_REGULAR may be cleared later by a strong definition in
3921 a shared library. We account for that possibility below by
3922 storing information in the dyn_relocs field of the hash
3923 table entry. A similar situation occurs when creating
3924 shared libraries and symbol visibility changes render the
3925 symbol local.
3926
3927 If on the other hand, we are creating an executable, we
3928 may need to keep relocations for symbols satisfied by a
3929 dynamic library if we manage to avoid copy relocs for the
3930 symbol. */
3931 dodyn:
3932 if ((info->shared
3933 && (MUST_BE_DYN_RELOC (r_type)
3934 || (h != NULL
3935 && (! info->symbolic
3936 || h->root.type == bfd_link_hash_defweak
3937 || (h->elf_link_hash_flags
3938 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3939 || (ELIMINATE_COPY_RELOCS
3940 && !info->shared
3941 && h != NULL
3942 && (h->root.type == bfd_link_hash_defweak
3943 || (h->elf_link_hash_flags
3944 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3945 {
3946 struct ppc_dyn_relocs *p;
3947 struct ppc_dyn_relocs **head;
3948
3949 /* We must copy these reloc types into the output file.
3950 Create a reloc section in dynobj and make room for
3951 this reloc. */
3952 if (sreloc == NULL)
3953 {
3954 const char *name;
3955 bfd *dynobj;
3956
3957 name = (bfd_elf_string_from_elf_section
3958 (abfd,
3959 elf_elfheader (abfd)->e_shstrndx,
3960 elf_section_data (sec)->rel_hdr.sh_name));
3961 if (name == NULL)
3962 return FALSE;
3963
3964 if (strncmp (name, ".rela", 5) != 0
3965 || strcmp (bfd_get_section_name (abfd, sec),
3966 name + 5) != 0)
3967 {
3968 (*_bfd_error_handler)
3969 (_("%s: bad relocation section name `%s\'"),
3970 bfd_archive_filename (abfd), name);
3971 bfd_set_error (bfd_error_bad_value);
3972 }
3973
3974 dynobj = htab->elf.dynobj;
3975 sreloc = bfd_get_section_by_name (dynobj, name);
3976 if (sreloc == NULL)
3977 {
3978 flagword flags;
3979
3980 sreloc = bfd_make_section (dynobj, name);
3981 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3982 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3983 if ((sec->flags & SEC_ALLOC) != 0)
3984 flags |= SEC_ALLOC | SEC_LOAD;
3985 if (sreloc == NULL
3986 || ! bfd_set_section_flags (dynobj, sreloc, flags)
3987 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
3988 return FALSE;
3989 }
3990 elf_section_data (sec)->sreloc = sreloc;
3991 }
3992
3993 /* If this is a global symbol, we count the number of
3994 relocations we need for this symbol. */
3995 if (h != NULL)
3996 {
3997 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
3998 }
3999 else
4000 {
4001 /* Track dynamic relocs needed for local syms too.
4002 We really need local syms available to do this
4003 easily. Oh well. */
4004
4005 asection *s;
4006 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4007 sec, r_symndx);
4008 if (s == NULL)
4009 return FALSE;
4010
4011 head = ((struct ppc_dyn_relocs **)
4012 &elf_section_data (s)->local_dynrel);
4013 }
4014
4015 p = *head;
4016 if (p == NULL || p->sec != sec)
4017 {
4018 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4019 if (p == NULL)
4020 return FALSE;
4021 p->next = *head;
4022 *head = p;
4023 p->sec = sec;
4024 p->count = 0;
4025 p->pc_count = 0;
4026 }
4027
4028 p->count += 1;
4029 if (!MUST_BE_DYN_RELOC (r_type))
4030 p->pc_count += 1;
4031 }
4032 break;
4033
4034 default:
4035 break;
4036 }
4037 }
4038
4039 return TRUE;
4040 }
4041
4042 /* Return the section that should be marked against GC for a given
4043 relocation. */
4044
4045 static asection *
4046 ppc64_elf_gc_mark_hook (asection *sec,
4047 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4048 Elf_Internal_Rela *rel,
4049 struct elf_link_hash_entry *h,
4050 Elf_Internal_Sym *sym)
4051 {
4052 asection *rsec = NULL;
4053
4054 if (h != NULL)
4055 {
4056 enum elf_ppc64_reloc_type r_type;
4057 struct ppc_link_hash_entry *fdh;
4058
4059 r_type = ELF64_R_TYPE (rel->r_info);
4060 switch (r_type)
4061 {
4062 case R_PPC64_GNU_VTINHERIT:
4063 case R_PPC64_GNU_VTENTRY:
4064 break;
4065
4066 default:
4067 switch (h->root.type)
4068 {
4069 case bfd_link_hash_defined:
4070 case bfd_link_hash_defweak:
4071 fdh = (struct ppc_link_hash_entry *) h;
4072
4073 /* Function descriptor syms cause the associated
4074 function code sym section to be marked. */
4075 if (fdh->is_func_descriptor)
4076 rsec = fdh->oh->root.u.def.section;
4077
4078 /* Function entry syms return NULL if they are in .opd
4079 and are not ._start (or others undefined on the ld
4080 command line). Thus we avoid marking all function
4081 sections, as all functions are referenced in .opd. */
4082 else if ((fdh->oh != NULL
4083 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4084 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4085 rsec = h->root.u.def.section;
4086 break;
4087
4088 case bfd_link_hash_common:
4089 rsec = h->root.u.c.p->section;
4090 break;
4091
4092 default:
4093 break;
4094 }
4095 }
4096 }
4097 else
4098 {
4099 asection **opd_sym_section;
4100
4101 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4102 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4103 if (opd_sym_section != NULL)
4104 rsec = opd_sym_section[sym->st_value / 24];
4105 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4106 rsec = NULL;
4107 }
4108
4109 return rsec;
4110 }
4111
4112 /* Update the .got, .plt. and dynamic reloc reference counts for the
4113 section being removed. */
4114
4115 static bfd_boolean
4116 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4117 asection *sec, const Elf_Internal_Rela *relocs)
4118 {
4119 struct ppc_link_hash_table *htab;
4120 Elf_Internal_Shdr *symtab_hdr;
4121 struct elf_link_hash_entry **sym_hashes;
4122 struct got_entry **local_got_ents;
4123 const Elf_Internal_Rela *rel, *relend;
4124
4125 elf_section_data (sec)->local_dynrel = NULL;
4126
4127 htab = ppc_hash_table (info);
4128 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4129 sym_hashes = elf_sym_hashes (abfd);
4130 local_got_ents = elf_local_got_ents (abfd);
4131
4132 relend = relocs + sec->reloc_count;
4133 for (rel = relocs; rel < relend; rel++)
4134 {
4135 unsigned long r_symndx;
4136 enum elf_ppc64_reloc_type r_type;
4137 struct elf_link_hash_entry *h = NULL;
4138 char tls_type = 0;
4139
4140 r_symndx = ELF64_R_SYM (rel->r_info);
4141 r_type = ELF64_R_TYPE (rel->r_info);
4142 if (r_symndx >= symtab_hdr->sh_info)
4143 {
4144 struct ppc_link_hash_entry *eh;
4145 struct ppc_dyn_relocs **pp;
4146 struct ppc_dyn_relocs *p;
4147
4148 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4149 eh = (struct ppc_link_hash_entry *) h;
4150
4151 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4152 if (p->sec == sec)
4153 {
4154 /* Everything must go for SEC. */
4155 *pp = p->next;
4156 break;
4157 }
4158 }
4159
4160 switch (r_type)
4161 {
4162 case R_PPC64_GOT_TLSLD16:
4163 case R_PPC64_GOT_TLSLD16_LO:
4164 case R_PPC64_GOT_TLSLD16_HI:
4165 case R_PPC64_GOT_TLSLD16_HA:
4166 ppc64_tlsld_got (abfd)->refcount -= 1;
4167 tls_type = TLS_TLS | TLS_LD;
4168 goto dogot;
4169
4170 case R_PPC64_GOT_TLSGD16:
4171 case R_PPC64_GOT_TLSGD16_LO:
4172 case R_PPC64_GOT_TLSGD16_HI:
4173 case R_PPC64_GOT_TLSGD16_HA:
4174 tls_type = TLS_TLS | TLS_GD;
4175 goto dogot;
4176
4177 case R_PPC64_GOT_TPREL16_DS:
4178 case R_PPC64_GOT_TPREL16_LO_DS:
4179 case R_PPC64_GOT_TPREL16_HI:
4180 case R_PPC64_GOT_TPREL16_HA:
4181 tls_type = TLS_TLS | TLS_TPREL;
4182 goto dogot;
4183
4184 case R_PPC64_GOT_DTPREL16_DS:
4185 case R_PPC64_GOT_DTPREL16_LO_DS:
4186 case R_PPC64_GOT_DTPREL16_HI:
4187 case R_PPC64_GOT_DTPREL16_HA:
4188 tls_type = TLS_TLS | TLS_DTPREL;
4189 goto dogot;
4190
4191 case R_PPC64_GOT16:
4192 case R_PPC64_GOT16_DS:
4193 case R_PPC64_GOT16_HA:
4194 case R_PPC64_GOT16_HI:
4195 case R_PPC64_GOT16_LO:
4196 case R_PPC64_GOT16_LO_DS:
4197 dogot:
4198 {
4199 struct got_entry *ent;
4200
4201 if (h != NULL)
4202 ent = h->got.glist;
4203 else
4204 ent = local_got_ents[r_symndx];
4205
4206 for (; ent != NULL; ent = ent->next)
4207 if (ent->addend == rel->r_addend
4208 && ent->owner == abfd
4209 && ent->tls_type == tls_type)
4210 break;
4211 if (ent == NULL)
4212 abort ();
4213 if (ent->got.refcount > 0)
4214 ent->got.refcount -= 1;
4215 }
4216 break;
4217
4218 case R_PPC64_PLT16_HA:
4219 case R_PPC64_PLT16_HI:
4220 case R_PPC64_PLT16_LO:
4221 case R_PPC64_PLT32:
4222 case R_PPC64_PLT64:
4223 case R_PPC64_REL14:
4224 case R_PPC64_REL14_BRNTAKEN:
4225 case R_PPC64_REL14_BRTAKEN:
4226 case R_PPC64_REL24:
4227 if (h != NULL)
4228 {
4229 struct plt_entry *ent;
4230
4231 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4232 if (ent->addend == rel->r_addend)
4233 break;
4234 if (ent == NULL)
4235 abort ();
4236 if (ent->plt.refcount > 0)
4237 ent->plt.refcount -= 1;
4238 }
4239 break;
4240
4241 default:
4242 break;
4243 }
4244 }
4245 return TRUE;
4246 }
4247
4248 /* Called via elf_link_hash_traverse to transfer dynamic linking
4249 information on function code symbol entries to their corresponding
4250 function descriptor symbol entries. */
4251 static bfd_boolean
4252 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4253 {
4254 struct bfd_link_info *info;
4255 struct ppc_link_hash_table *htab;
4256 struct plt_entry *ent;
4257 struct ppc_link_hash_entry *fh;
4258 struct ppc_link_hash_entry *fdh;
4259 bfd_boolean force_local;
4260
4261 fh = (struct ppc_link_hash_entry *) h;
4262 if (fh->elf.root.type == bfd_link_hash_indirect)
4263 return TRUE;
4264
4265 if (fh->elf.root.type == bfd_link_hash_warning)
4266 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4267
4268 info = inf;
4269 htab = ppc_hash_table (info);
4270
4271 /* If this is a function code symbol, transfer dynamic linking
4272 information to the function descriptor symbol. */
4273 if (!fh->is_func)
4274 return TRUE;
4275
4276 if (fh->elf.root.type == bfd_link_hash_undefweak
4277 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4278 htab->have_undefweak = TRUE;
4279
4280 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4281 if (ent->plt.refcount > 0)
4282 break;
4283 if (ent == NULL
4284 || fh->elf.root.root.string[0] != '.'
4285 || fh->elf.root.root.string[1] == '\0')
4286 return TRUE;
4287
4288 /* Find the corresponding function descriptor symbol. Create it
4289 as undefined if necessary. */
4290
4291 fdh = get_fdh (fh, htab);
4292 if (fdh != NULL)
4293 while (fdh->elf.root.type == bfd_link_hash_indirect
4294 || fdh->elf.root.type == bfd_link_hash_warning)
4295 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4296
4297 if (fdh == NULL
4298 && info->shared
4299 && (fh->elf.root.type == bfd_link_hash_undefined
4300 || fh->elf.root.type == bfd_link_hash_undefweak))
4301 {
4302 bfd *abfd;
4303 asymbol *newsym;
4304 struct bfd_link_hash_entry *bh;
4305
4306 abfd = fh->elf.root.u.undef.abfd;
4307 newsym = bfd_make_empty_symbol (abfd);
4308 newsym->name = fh->elf.root.root.string + 1;
4309 newsym->section = bfd_und_section_ptr;
4310 newsym->value = 0;
4311 newsym->flags = BSF_OBJECT;
4312 if (fh->elf.root.type == bfd_link_hash_undefweak)
4313 newsym->flags |= BSF_WEAK;
4314
4315 bh = &fdh->elf.root;
4316 if ( !(_bfd_generic_link_add_one_symbol
4317 (info, abfd, newsym->name, newsym->flags,
4318 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4319 {
4320 return FALSE;
4321 }
4322 fdh = (struct ppc_link_hash_entry *) bh;
4323 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4324 fdh->elf.size = 24;
4325 fdh->elf.type = STT_OBJECT;
4326 }
4327
4328 if (fdh != NULL
4329 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4330 && (info->shared
4331 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4332 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4333 || (fdh->elf.root.type == bfd_link_hash_undefweak
4334 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4335 {
4336 if (fdh->elf.dynindx == -1)
4337 if (! bfd_elf64_link_record_dynamic_symbol (info, &fdh->elf))
4338 return FALSE;
4339 fdh->elf.elf_link_hash_flags
4340 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4341 | ELF_LINK_HASH_REF_DYNAMIC
4342 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4343 | ELF_LINK_NON_GOT_REF));
4344 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4345 {
4346 fdh->elf.plt.plist = fh->elf.plt.plist;
4347 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4348 }
4349 fdh->is_func_descriptor = 1;
4350 fdh->oh = &fh->elf;
4351 fh->oh = &fdh->elf;
4352 }
4353
4354 /* Now that the info is on the function descriptor, clear the
4355 function code sym info. Any function code syms for which we
4356 don't have a definition in a regular file, we force local.
4357 This prevents a shared library from exporting syms that have
4358 been imported from another library. Function code syms that
4359 are really in the library we must leave global to prevent the
4360 linker dragging in a definition from a static library. */
4361 force_local
4362 = (info->shared
4363 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4364 || fdh == NULL
4365 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4366 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4367 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4368
4369 return TRUE;
4370 }
4371
4372 #define MIN_SAVE_FPR 14
4373 #define MAX_SAVE_FPR 31
4374
4375 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4376 this hook to a) provide some gcc support functions, and b) transfer
4377 dynamic linking information gathered so far on function code symbol
4378 entries, to their corresponding function descriptor symbol entries. */
4379 static bfd_boolean
4380 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4381 struct bfd_link_info *info)
4382 {
4383 struct ppc_link_hash_table *htab;
4384 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4385 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4386 unsigned int i;
4387 struct elf_link_hash_entry *h;
4388 bfd_byte *p;
4389 char sym[10];
4390
4391 htab = ppc_hash_table (info);
4392
4393 if (htab->sfpr == NULL)
4394 /* We don't have any relocs. */
4395 return TRUE;
4396
4397 /* First provide any missing ._savef* and ._restf* functions. */
4398 memcpy (sym, "._savef14", 10);
4399 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4400 {
4401 sym[7] = i / 10 + '0';
4402 sym[8] = i % 10 + '0';
4403 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4404 if (h != NULL
4405 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4406 {
4407 if (lowest_savef > i)
4408 lowest_savef = i;
4409 h->root.type = bfd_link_hash_defined;
4410 h->root.u.def.section = htab->sfpr;
4411 h->root.u.def.value = (i - lowest_savef) * 4;
4412 h->type = STT_FUNC;
4413 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4414 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4415 }
4416 }
4417
4418 memcpy (sym, "._restf14", 10);
4419 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4420 {
4421 sym[7] = i / 10 + '0';
4422 sym[8] = i % 10 + '0';
4423 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4424 if (h != NULL
4425 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4426 {
4427 if (lowest_restf > i)
4428 lowest_restf = i;
4429 h->root.type = bfd_link_hash_defined;
4430 h->root.u.def.section = htab->sfpr;
4431 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4432 + (i - lowest_restf) * 4);
4433 h->type = STT_FUNC;
4434 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4435 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4436 }
4437 }
4438
4439 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4440
4441 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4442 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4443
4444 if (htab->sfpr->_raw_size == 0)
4445 {
4446 if (!htab->have_undefweak)
4447 {
4448 _bfd_strip_section_from_output (info, htab->sfpr);
4449 return TRUE;
4450 }
4451
4452 htab->sfpr->_raw_size = 4;
4453 }
4454
4455 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4456 if (p == NULL)
4457 return FALSE;
4458 htab->sfpr->contents = p;
4459
4460 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4461 {
4462 unsigned int fpr = i << 21;
4463 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4464 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4465 p += 4;
4466 }
4467 if (lowest_savef <= MAX_SAVE_FPR)
4468 {
4469 bfd_put_32 (htab->elf.dynobj, BLR, p);
4470 p += 4;
4471 }
4472
4473 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4474 {
4475 unsigned int fpr = i << 21;
4476 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4477 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4478 p += 4;
4479 }
4480 if (lowest_restf <= MAX_SAVE_FPR
4481 || htab->sfpr->_raw_size == 4)
4482 {
4483 bfd_put_32 (htab->elf.dynobj, BLR, p);
4484 }
4485
4486 return TRUE;
4487 }
4488
4489 /* Adjust a symbol defined by a dynamic object and referenced by a
4490 regular object. The current definition is in some section of the
4491 dynamic object, but we're not including those sections. We have to
4492 change the definition to something the rest of the link can
4493 understand. */
4494
4495 static bfd_boolean
4496 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4497 struct elf_link_hash_entry *h)
4498 {
4499 struct ppc_link_hash_table *htab;
4500 asection *s;
4501 unsigned int power_of_two;
4502
4503 htab = ppc_hash_table (info);
4504
4505 /* Deal with function syms. */
4506 if (h->type == STT_FUNC
4507 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4508 {
4509 /* Clear procedure linkage table information for any symbol that
4510 won't need a .plt entry. */
4511 struct plt_entry *ent;
4512 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4513 if (ent->plt.refcount > 0)
4514 break;
4515 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4516 || ent == NULL
4517 || SYMBOL_CALLS_LOCAL (info, h)
4518 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4519 && h->root.type == bfd_link_hash_undefweak))
4520 {
4521 h->plt.plist = NULL;
4522 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4523 }
4524 }
4525 else
4526 h->plt.plist = NULL;
4527
4528 /* If this is a weak symbol, and there is a real definition, the
4529 processor independent code will have arranged for us to see the
4530 real definition first, and we can just use the same value. */
4531 if (h->weakdef != NULL)
4532 {
4533 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4534 || h->weakdef->root.type == bfd_link_hash_defweak);
4535 h->root.u.def.section = h->weakdef->root.u.def.section;
4536 h->root.u.def.value = h->weakdef->root.u.def.value;
4537 if (ELIMINATE_COPY_RELOCS)
4538 h->elf_link_hash_flags
4539 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4540 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4541 return TRUE;
4542 }
4543
4544 /* If we are creating a shared library, we must presume that the
4545 only references to the symbol are via the global offset table.
4546 For such cases we need not do anything here; the relocations will
4547 be handled correctly by relocate_section. */
4548 if (info->shared)
4549 return TRUE;
4550
4551 /* If there are no references to this symbol that do not use the
4552 GOT, we don't need to generate a copy reloc. */
4553 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4554 return TRUE;
4555
4556 if (ELIMINATE_COPY_RELOCS)
4557 {
4558 struct ppc_link_hash_entry * eh;
4559 struct ppc_dyn_relocs *p;
4560
4561 eh = (struct ppc_link_hash_entry *) h;
4562 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4563 {
4564 s = p->sec->output_section;
4565 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4566 break;
4567 }
4568
4569 /* If we didn't find any dynamic relocs in read-only sections, then
4570 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4571 if (p == NULL)
4572 {
4573 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4574 return TRUE;
4575 }
4576 }
4577
4578 if (h->plt.plist != NULL)
4579 {
4580 /* We should never get here, but unfortunately there are versions
4581 of gcc out there that improperly (for this ABI) put initialized
4582 function pointers, vtable refs and suchlike in read-only
4583 sections. Allow them to proceed, but warn that this might
4584 break at runtime. */
4585 (*_bfd_error_handler)
4586 (_("copy reloc against `%s' requires lazy plt linking; "
4587 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4588 h->root.root.string);
4589 }
4590
4591 /* This is a reference to a symbol defined by a dynamic object which
4592 is not a function. */
4593
4594 /* We must allocate the symbol in our .dynbss section, which will
4595 become part of the .bss section of the executable. There will be
4596 an entry for this symbol in the .dynsym section. The dynamic
4597 object will contain position independent code, so all references
4598 from the dynamic object to this symbol will go through the global
4599 offset table. The dynamic linker will use the .dynsym entry to
4600 determine the address it must put in the global offset table, so
4601 both the dynamic object and the regular object will refer to the
4602 same memory location for the variable. */
4603
4604 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4605 to copy the initial value out of the dynamic object and into the
4606 runtime process image. We need to remember the offset into the
4607 .rela.bss section we are going to use. */
4608 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4609 {
4610 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4611 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4612 }
4613
4614 /* We need to figure out the alignment required for this symbol. I
4615 have no idea how ELF linkers handle this. */
4616 power_of_two = bfd_log2 (h->size);
4617 if (power_of_two > 4)
4618 power_of_two = 4;
4619
4620 /* Apply the required alignment. */
4621 s = htab->dynbss;
4622 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4623 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4624 {
4625 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4626 return FALSE;
4627 }
4628
4629 /* Define the symbol as being at this point in the section. */
4630 h->root.u.def.section = s;
4631 h->root.u.def.value = s->_raw_size;
4632
4633 /* Increment the section size to make room for the symbol. */
4634 s->_raw_size += h->size;
4635
4636 return TRUE;
4637 }
4638
4639 /* If given a function descriptor symbol, hide both the function code
4640 sym and the descriptor. */
4641 static void
4642 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4643 struct elf_link_hash_entry *h,
4644 bfd_boolean force_local)
4645 {
4646 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4647
4648 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4649 {
4650 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4651
4652 if (fh == NULL)
4653 {
4654 const char *p, *q;
4655 struct ppc_link_hash_table *htab;
4656 char save;
4657
4658 /* We aren't supposed to use alloca in BFD because on
4659 systems which do not have alloca the version in libiberty
4660 calls xmalloc, which might cause the program to crash
4661 when it runs out of memory. This function doesn't have a
4662 return status, so there's no way to gracefully return an
4663 error. So cheat. We know that string[-1] can be safely
4664 dereferenced; It's either a string in an ELF string
4665 table, or allocated in an objalloc structure. */
4666
4667 p = h->root.root.string - 1;
4668 save = *p;
4669 *(char *) p = '.';
4670 htab = ppc_hash_table (info);
4671 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4672 *(char *) p = save;
4673
4674 /* Unfortunately, if it so happens that the string we were
4675 looking for was allocated immediately before this string,
4676 then we overwrote the string terminator. That's the only
4677 reason the lookup should fail. */
4678 if (fh == NULL)
4679 {
4680 q = h->root.root.string + strlen (h->root.root.string);
4681 while (q >= h->root.root.string && *q == *p)
4682 --q, --p;
4683 if (q < h->root.root.string && *p == '.')
4684 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4685 }
4686 if (fh != NULL)
4687 {
4688 ((struct ppc_link_hash_entry *) h)->oh = fh;
4689 ((struct ppc_link_hash_entry *) fh)->oh = h;
4690 }
4691 }
4692 if (fh != NULL)
4693 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4694 }
4695 }
4696
4697 static bfd_boolean
4698 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4699 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4700 unsigned long r_symndx, bfd *ibfd)
4701 {
4702 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4703
4704 if (r_symndx >= symtab_hdr->sh_info)
4705 {
4706 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4707 struct elf_link_hash_entry *h;
4708
4709 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4710 while (h->root.type == bfd_link_hash_indirect
4711 || h->root.type == bfd_link_hash_warning)
4712 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4713
4714 if (hp != NULL)
4715 *hp = h;
4716
4717 if (symp != NULL)
4718 *symp = NULL;
4719
4720 if (symsecp != NULL)
4721 {
4722 asection *symsec = NULL;
4723 if (h->root.type == bfd_link_hash_defined
4724 || h->root.type == bfd_link_hash_defweak)
4725 symsec = h->root.u.def.section;
4726 *symsecp = symsec;
4727 }
4728
4729 if (tls_maskp != NULL)
4730 {
4731 struct ppc_link_hash_entry *eh;
4732
4733 eh = (struct ppc_link_hash_entry *) h;
4734 *tls_maskp = &eh->tls_mask;
4735 }
4736 }
4737 else
4738 {
4739 Elf_Internal_Sym *sym;
4740 Elf_Internal_Sym *locsyms = *locsymsp;
4741
4742 if (locsyms == NULL)
4743 {
4744 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4745 if (locsyms == NULL)
4746 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4747 symtab_hdr->sh_info,
4748 0, NULL, NULL, NULL);
4749 if (locsyms == NULL)
4750 return FALSE;
4751 *locsymsp = locsyms;
4752 }
4753 sym = locsyms + r_symndx;
4754
4755 if (hp != NULL)
4756 *hp = NULL;
4757
4758 if (symp != NULL)
4759 *symp = sym;
4760
4761 if (symsecp != NULL)
4762 {
4763 asection *symsec = NULL;
4764 if ((sym->st_shndx != SHN_UNDEF
4765 && sym->st_shndx < SHN_LORESERVE)
4766 || sym->st_shndx > SHN_HIRESERVE)
4767 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4768 *symsecp = symsec;
4769 }
4770
4771 if (tls_maskp != NULL)
4772 {
4773 struct got_entry **lgot_ents;
4774 char *tls_mask;
4775
4776 tls_mask = NULL;
4777 lgot_ents = elf_local_got_ents (ibfd);
4778 if (lgot_ents != NULL)
4779 {
4780 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4781 tls_mask = &lgot_masks[r_symndx];
4782 }
4783 *tls_maskp = tls_mask;
4784 }
4785 }
4786 return TRUE;
4787 }
4788
4789 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4790 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4791 type suitable for optimization, and 1 otherwise. */
4792
4793 static int
4794 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
4795 Elf_Internal_Sym **locsymsp,
4796 const Elf_Internal_Rela *rel, bfd *ibfd)
4797 {
4798 unsigned long r_symndx;
4799 int next_r;
4800 struct elf_link_hash_entry *h;
4801 Elf_Internal_Sym *sym;
4802 asection *sec;
4803 bfd_vma off;
4804
4805 r_symndx = ELF64_R_SYM (rel->r_info);
4806 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4807 return 0;
4808
4809 if ((*tls_maskp != NULL && **tls_maskp != 0)
4810 || sec == NULL
4811 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4812 return 1;
4813
4814 /* Look inside a TOC section too. */
4815 if (h != NULL)
4816 {
4817 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4818 off = h->root.u.def.value;
4819 }
4820 else
4821 off = sym->st_value;
4822 off += rel->r_addend;
4823 BFD_ASSERT (off % 8 == 0);
4824 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4825 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4826 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4827 return 0;
4828 if (toc_symndx != NULL)
4829 *toc_symndx = r_symndx;
4830 if ((h == NULL
4831 || ((h->root.type == bfd_link_hash_defined
4832 || h->root.type == bfd_link_hash_defweak)
4833 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4834 && (next_r == -1 || next_r == -2))
4835 return 1 - next_r;
4836 return 1;
4837 }
4838
4839 bfd_boolean
4840 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4841 {
4842 bfd *ibfd;
4843
4844 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4845 {
4846 asection *sec;
4847 Elf_Internal_Rela *relstart, *rel, *relend;
4848 Elf_Internal_Shdr *symtab_hdr;
4849 Elf_Internal_Sym *local_syms;
4850 struct elf_link_hash_entry **sym_hashes;
4851 bfd_vma offset;
4852 bfd_size_type amt;
4853 long *adjust;
4854 bfd_boolean need_edit;
4855
4856 sec = bfd_get_section_by_name (ibfd, ".opd");
4857 if (sec == NULL)
4858 continue;
4859
4860 amt = sec->_raw_size * sizeof (long) / 24;
4861 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4862 if (adjust == NULL)
4863 {
4864 /* Must be a ld -r link. ie. check_relocs hasn't been
4865 called. */
4866 adjust = bfd_zalloc (obfd, amt);
4867 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4868 }
4869 memset (adjust, 0, amt);
4870
4871 if (sec->output_section == bfd_abs_section_ptr)
4872 continue;
4873
4874 /* Look through the section relocs. */
4875 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4876 continue;
4877
4878 local_syms = NULL;
4879 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4880 sym_hashes = elf_sym_hashes (ibfd);
4881
4882 /* Read the relocations. */
4883 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4884 info->keep_memory);
4885 if (relstart == NULL)
4886 return FALSE;
4887
4888 /* First run through the relocs to check they are sane, and to
4889 determine whether we need to edit this opd section. */
4890 need_edit = FALSE;
4891 offset = 0;
4892 relend = relstart + sec->reloc_count;
4893 for (rel = relstart; rel < relend; )
4894 {
4895 enum elf_ppc64_reloc_type r_type;
4896 unsigned long r_symndx;
4897 asection *sym_sec;
4898 struct elf_link_hash_entry *h;
4899 Elf_Internal_Sym *sym;
4900
4901 /* .opd contains a regular array of 24 byte entries. We're
4902 only interested in the reloc pointing to a function entry
4903 point. */
4904 if (rel->r_offset != offset
4905 || rel + 1 >= relend
4906 || (rel + 1)->r_offset != offset + 8)
4907 {
4908 /* If someone messes with .opd alignment then after a
4909 "ld -r" we might have padding in the middle of .opd.
4910 Also, there's nothing to prevent someone putting
4911 something silly in .opd with the assembler. No .opd
4912 optimization for them! */
4913 (*_bfd_error_handler)
4914 (_("%s: .opd is not a regular array of opd entries"),
4915 bfd_archive_filename (ibfd));
4916 need_edit = FALSE;
4917 break;
4918 }
4919
4920 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
4921 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
4922 {
4923 (*_bfd_error_handler)
4924 (_("%s: unexpected reloc type %u in .opd section"),
4925 bfd_archive_filename (ibfd), r_type);
4926 need_edit = FALSE;
4927 break;
4928 }
4929
4930 r_symndx = ELF64_R_SYM (rel->r_info);
4931 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
4932 r_symndx, ibfd))
4933 goto error_ret;
4934
4935 if (sym_sec == NULL || sym_sec->owner == NULL)
4936 {
4937 const char *sym_name;
4938 if (h != NULL)
4939 sym_name = h->root.root.string;
4940 else
4941 sym_name = bfd_elf_local_sym_name (ibfd, sym);
4942
4943 (*_bfd_error_handler)
4944 (_("%s: undefined sym `%s' in .opd section"),
4945 bfd_archive_filename (ibfd),
4946 sym_name);
4947 need_edit = FALSE;
4948 break;
4949 }
4950
4951 /* opd entries are always for functions defined in the
4952 current input bfd. If the symbol isn't defined in the
4953 input bfd, then we won't be using the function in this
4954 bfd; It must be defined in a linkonce section in another
4955 bfd, or is weak. It's also possible that we are
4956 discarding the function due to a linker script /DISCARD/,
4957 which we test for via the output_section. */
4958 if (sym_sec->owner != ibfd
4959 || sym_sec->output_section == bfd_abs_section_ptr)
4960 need_edit = TRUE;
4961
4962 offset += 24;
4963 rel += 2;
4964 /* Allow for the possibility of a reloc on the third word. */
4965 if (rel < relend
4966 && rel->r_offset == offset - 8)
4967 rel += 1;
4968 }
4969
4970 if (need_edit)
4971 {
4972 Elf_Internal_Rela *write_rel;
4973 bfd_byte *rptr, *wptr;
4974 bfd_boolean skip;
4975
4976 /* This seems a waste of time as input .opd sections are all
4977 zeros as generated by gcc, but I suppose there's no reason
4978 this will always be so. We might start putting something in
4979 the third word of .opd entries. */
4980 if ((sec->flags & SEC_IN_MEMORY) == 0)
4981 {
4982 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
4983 if (loc == NULL
4984 || !bfd_get_section_contents (ibfd, sec, loc, 0,
4985 sec->_raw_size))
4986 {
4987 error_ret:
4988 if (local_syms != NULL
4989 && symtab_hdr->contents != (unsigned char *) local_syms)
4990 free (local_syms);
4991 if (elf_section_data (sec)->relocs != relstart)
4992 free (relstart);
4993 return FALSE;
4994 }
4995 sec->contents = loc;
4996 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
4997 }
4998
4999 elf_section_data (sec)->relocs = relstart;
5000
5001 wptr = sec->contents;
5002 rptr = sec->contents;
5003 write_rel = relstart;
5004 skip = FALSE;
5005 offset = 0;
5006 for (rel = relstart; rel < relend; rel++)
5007 {
5008 unsigned long r_symndx;
5009 asection *sym_sec;
5010 struct elf_link_hash_entry *h;
5011 Elf_Internal_Sym *sym;
5012
5013 r_symndx = ELF64_R_SYM (rel->r_info);
5014 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5015 r_symndx, ibfd))
5016 goto error_ret;
5017
5018 if (rel->r_offset == offset)
5019 {
5020 struct ppc_link_hash_entry *fdh = NULL;
5021 if (h != NULL)
5022 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5023 ppc_hash_table (info));
5024
5025 skip = (sym_sec->owner != ibfd
5026 || sym_sec->output_section == bfd_abs_section_ptr);
5027 if (skip)
5028 {
5029 if (h != NULL && sym_sec->owner == ibfd)
5030 {
5031 /* Arrange for the function descriptor sym
5032 to be dropped. */
5033 fdh->elf.root.u.def.value = 0;
5034 fdh->elf.root.u.def.section = sym_sec;
5035 }
5036 }
5037 else
5038 {
5039 /* We'll be keeping this opd entry. */
5040
5041 if (h != NULL)
5042 {
5043 /* Redefine the function descriptor symbol
5044 to this location in the opd section.
5045 We've checked above that opd relocs are
5046 ordered. */
5047 fdh->elf.root.u.def.value = wptr - sec->contents;
5048 }
5049 else
5050 {
5051 /* Local syms are a bit tricky. We could
5052 tweak them as they can be cached, but
5053 we'd need to look through the local syms
5054 for the function descriptor sym which we
5055 don't have at the moment. So keep an
5056 array of adjustments. */
5057 adjust[rel->r_offset / 24] = wptr - rptr;
5058 }
5059
5060 if (wptr != rptr)
5061 memcpy (wptr, rptr, 24);
5062 wptr += 24;
5063 }
5064 rptr += 24;
5065 offset += 24;
5066 }
5067
5068 if (skip)
5069 {
5070 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5071 if (info->shared)
5072 {
5073 /* We won't be needing dynamic relocs here. */
5074 struct ppc_dyn_relocs **pp;
5075 struct ppc_dyn_relocs *p;
5076
5077 if (h != NULL)
5078 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5079 else if (sym_sec != NULL)
5080 pp = ((struct ppc_dyn_relocs **)
5081 &elf_section_data (sym_sec)->local_dynrel);
5082 else
5083 pp = ((struct ppc_dyn_relocs **)
5084 &elf_section_data (sec)->local_dynrel);
5085 while ((p = *pp) != NULL)
5086 {
5087 if (p->sec == sec)
5088 {
5089 p->count -= 1;
5090 if (p->count == 0)
5091 *pp = p->next;
5092 break;
5093 }
5094 pp = &p->next;
5095 }
5096 }
5097 }
5098 else
5099 {
5100 /* We need to adjust any reloc offsets to point to the
5101 new opd entries. While we're at it, we may as well
5102 remove redundant relocs. */
5103 rel->r_offset += wptr - rptr;
5104 if (write_rel != rel)
5105 memcpy (write_rel, rel, sizeof (*rel));
5106 ++write_rel;
5107 }
5108 }
5109
5110 sec->_cooked_size = wptr - sec->contents;
5111 sec->reloc_count = write_rel - relstart;
5112 /* Fudge the size too, as this is used later in
5113 elf_bfd_final_link if we are emitting relocs. */
5114 elf_section_data (sec)->rel_hdr.sh_size
5115 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5116 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5117 }
5118 else if (elf_section_data (sec)->relocs != relstart)
5119 free (relstart);
5120
5121 if (local_syms != NULL
5122 && symtab_hdr->contents != (unsigned char *) local_syms)
5123 {
5124 if (!info->keep_memory)
5125 free (local_syms);
5126 else
5127 symtab_hdr->contents = (unsigned char *) local_syms;
5128 }
5129 }
5130
5131 return TRUE;
5132 }
5133
5134 /* Set htab->tls_sec. */
5135
5136 bfd_boolean
5137 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5138 {
5139 asection *tls;
5140 struct ppc_link_hash_table *htab;
5141
5142 for (tls = obfd->sections; tls != NULL; tls = tls->next)
5143 if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
5144 == (SEC_THREAD_LOCAL | SEC_LOAD))
5145 break;
5146
5147 htab = ppc_hash_table (info);
5148 htab->tls_sec = tls;
5149
5150 if (htab->tls_get_addr != NULL)
5151 {
5152 struct elf_link_hash_entry *h = htab->tls_get_addr;
5153
5154 while (h->root.type == bfd_link_hash_indirect
5155 || h->root.type == bfd_link_hash_warning)
5156 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5157
5158 htab->tls_get_addr = h;
5159 }
5160
5161 return tls != NULL;
5162 }
5163
5164 /* Run through all the TLS relocs looking for optimization
5165 opportunities. The linker has been hacked (see ppc64elf.em) to do
5166 a preliminary section layout so that we know the TLS segment
5167 offsets. We can't optimize earlier because some optimizations need
5168 to know the tp offset, and we need to optimize before allocating
5169 dynamic relocations. */
5170
5171 bfd_boolean
5172 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5173 {
5174 bfd *ibfd;
5175 asection *sec;
5176 struct ppc_link_hash_table *htab;
5177
5178 if (info->relocatable || info->shared)
5179 return TRUE;
5180
5181 htab = ppc_hash_table (info);
5182 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5183 {
5184 Elf_Internal_Sym *locsyms = NULL;
5185
5186 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5187 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5188 {
5189 Elf_Internal_Rela *relstart, *rel, *relend;
5190 int expecting_tls_get_addr;
5191
5192 /* Read the relocations. */
5193 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5194 info->keep_memory);
5195 if (relstart == NULL)
5196 return FALSE;
5197
5198 expecting_tls_get_addr = 0;
5199 relend = relstart + sec->reloc_count;
5200 for (rel = relstart; rel < relend; rel++)
5201 {
5202 enum elf_ppc64_reloc_type r_type;
5203 unsigned long r_symndx;
5204 struct elf_link_hash_entry *h;
5205 Elf_Internal_Sym *sym;
5206 asection *sym_sec;
5207 char *tls_mask;
5208 char tls_set, tls_clear, tls_type = 0;
5209 bfd_vma value;
5210 bfd_boolean ok_tprel, is_local;
5211
5212 r_symndx = ELF64_R_SYM (rel->r_info);
5213 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5214 r_symndx, ibfd))
5215 {
5216 err_free_rel:
5217 if (elf_section_data (sec)->relocs != relstart)
5218 free (relstart);
5219 if (locsyms != NULL
5220 && (elf_tdata (ibfd)->symtab_hdr.contents
5221 != (unsigned char *) locsyms))
5222 free (locsyms);
5223 return FALSE;
5224 }
5225
5226 if (h != NULL)
5227 {
5228 if (h->root.type != bfd_link_hash_defined
5229 && h->root.type != bfd_link_hash_defweak)
5230 continue;
5231 value = h->root.u.def.value;
5232 }
5233 else
5234 value = sym->st_value;
5235
5236 ok_tprel = FALSE;
5237 is_local = FALSE;
5238 if (h == NULL
5239 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5240 {
5241 is_local = TRUE;
5242 value += sym_sec->output_offset;
5243 value += sym_sec->output_section->vma;
5244 value -= htab->tls_sec->vma;
5245 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5246 < (bfd_vma) 1 << 32);
5247 }
5248
5249 r_type = ELF64_R_TYPE (rel->r_info);
5250 switch (r_type)
5251 {
5252 case R_PPC64_GOT_TLSLD16:
5253 case R_PPC64_GOT_TLSLD16_LO:
5254 case R_PPC64_GOT_TLSLD16_HI:
5255 case R_PPC64_GOT_TLSLD16_HA:
5256 /* These relocs should never be against a symbol
5257 defined in a shared lib. Leave them alone if
5258 that turns out to be the case. */
5259 ppc64_tlsld_got (ibfd)->refcount -= 1;
5260 if (!is_local)
5261 continue;
5262
5263 /* LD -> LE */
5264 tls_set = 0;
5265 tls_clear = TLS_LD;
5266 tls_type = TLS_TLS | TLS_LD;
5267 expecting_tls_get_addr = 1;
5268 break;
5269
5270 case R_PPC64_GOT_TLSGD16:
5271 case R_PPC64_GOT_TLSGD16_LO:
5272 case R_PPC64_GOT_TLSGD16_HI:
5273 case R_PPC64_GOT_TLSGD16_HA:
5274 if (ok_tprel)
5275 /* GD -> LE */
5276 tls_set = 0;
5277 else
5278 /* GD -> IE */
5279 tls_set = TLS_TLS | TLS_TPRELGD;
5280 tls_clear = TLS_GD;
5281 tls_type = TLS_TLS | TLS_GD;
5282 expecting_tls_get_addr = 1;
5283 break;
5284
5285 case R_PPC64_GOT_TPREL16_DS:
5286 case R_PPC64_GOT_TPREL16_LO_DS:
5287 case R_PPC64_GOT_TPREL16_HI:
5288 case R_PPC64_GOT_TPREL16_HA:
5289 expecting_tls_get_addr = 0;
5290 if (ok_tprel)
5291 {
5292 /* IE -> LE */
5293 tls_set = 0;
5294 tls_clear = TLS_TPREL;
5295 tls_type = TLS_TLS | TLS_TPREL;
5296 break;
5297 }
5298 else
5299 continue;
5300
5301 case R_PPC64_REL14:
5302 case R_PPC64_REL14_BRTAKEN:
5303 case R_PPC64_REL14_BRNTAKEN:
5304 case R_PPC64_REL24:
5305 if (h != NULL
5306 && h == htab->tls_get_addr)
5307 {
5308 if (!expecting_tls_get_addr
5309 && rel != relstart
5310 && ((ELF64_R_TYPE (rel[-1].r_info)
5311 == R_PPC64_TOC16)
5312 || (ELF64_R_TYPE (rel[-1].r_info)
5313 == R_PPC64_TOC16_LO)))
5314 {
5315 /* Check for toc tls entries. */
5316 char *toc_tls;
5317 int retval;
5318
5319 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
5320 rel - 1, ibfd);
5321 if (retval == 0)
5322 goto err_free_rel;
5323 if (toc_tls != NULL)
5324 expecting_tls_get_addr = retval > 1;
5325 }
5326
5327 if (expecting_tls_get_addr)
5328 {
5329 struct plt_entry *ent;
5330 for (ent = h->plt.plist; ent; ent = ent->next)
5331 if (ent->addend == 0)
5332 {
5333 if (ent->plt.refcount > 0)
5334 ent->plt.refcount -= 1;
5335 break;
5336 }
5337 }
5338 }
5339 expecting_tls_get_addr = 0;
5340 continue;
5341
5342 case R_PPC64_TPREL64:
5343 expecting_tls_get_addr = 0;
5344 if (ok_tprel)
5345 {
5346 /* IE -> LE */
5347 tls_set = TLS_EXPLICIT;
5348 tls_clear = TLS_TPREL;
5349 break;
5350 }
5351 else
5352 continue;
5353
5354 case R_PPC64_DTPMOD64:
5355 expecting_tls_get_addr = 0;
5356 if (rel + 1 < relend
5357 && (rel[1].r_info
5358 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5359 && rel[1].r_offset == rel->r_offset + 8)
5360 {
5361 if (ok_tprel)
5362 /* GD -> LE */
5363 tls_set = TLS_EXPLICIT | TLS_GD;
5364 else
5365 /* GD -> IE */
5366 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5367 tls_clear = TLS_GD;
5368 }
5369 else
5370 {
5371 if (!is_local)
5372 continue;
5373
5374 /* LD -> LE */
5375 tls_set = TLS_EXPLICIT;
5376 tls_clear = TLS_LD;
5377 }
5378 break;
5379
5380 default:
5381 expecting_tls_get_addr = 0;
5382 continue;
5383 }
5384
5385 if ((tls_set & TLS_EXPLICIT) == 0)
5386 {
5387 struct got_entry *ent;
5388
5389 /* Adjust got entry for this reloc. */
5390 if (h != NULL)
5391 ent = h->got.glist;
5392 else
5393 ent = elf_local_got_ents (ibfd)[r_symndx];
5394
5395 for (; ent != NULL; ent = ent->next)
5396 if (ent->addend == rel->r_addend
5397 && ent->owner == ibfd
5398 && ent->tls_type == tls_type)
5399 break;
5400 if (ent == NULL)
5401 abort ();
5402
5403 if (tls_set == 0)
5404 {
5405 /* We managed to get rid of a got entry. */
5406 if (ent->got.refcount > 0)
5407 ent->got.refcount -= 1;
5408 }
5409 }
5410 else if (h != NULL)
5411 {
5412 struct ppc_link_hash_entry * eh;
5413 struct ppc_dyn_relocs **pp;
5414 struct ppc_dyn_relocs *p;
5415
5416 /* Adjust dynamic relocs. */
5417 eh = (struct ppc_link_hash_entry *) h;
5418 for (pp = &eh->dyn_relocs;
5419 (p = *pp) != NULL;
5420 pp = &p->next)
5421 if (p->sec == sec)
5422 {
5423 /* If we got rid of a DTPMOD/DTPREL reloc
5424 pair then we'll lose one or two dyn
5425 relocs. */
5426 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5427 p->count -= 1;
5428 p->count -= 1;
5429 if (p->count == 0)
5430 *pp = p->next;
5431 break;
5432 }
5433 }
5434
5435 *tls_mask |= tls_set;
5436 *tls_mask &= ~tls_clear;
5437 }
5438
5439 if (elf_section_data (sec)->relocs != relstart)
5440 free (relstart);
5441 }
5442
5443 if (locsyms != NULL
5444 && (elf_tdata (ibfd)->symtab_hdr.contents
5445 != (unsigned char *) locsyms))
5446 {
5447 if (!info->keep_memory)
5448 free (locsyms);
5449 else
5450 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5451 }
5452 }
5453 return TRUE;
5454 }
5455
5456 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5457 will be called from elflink.h. If elflink.h doesn't call our
5458 finish_dynamic_symbol routine, we'll need to do something about
5459 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5460 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5461 ((DYN) \
5462 && ((SHARED) \
5463 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5464 && ((H)->dynindx != -1 \
5465 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5466
5467 /* Allocate space in .plt, .got and associated reloc sections for
5468 dynamic relocs. */
5469
5470 static bfd_boolean
5471 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5472 {
5473 struct bfd_link_info *info;
5474 struct ppc_link_hash_table *htab;
5475 asection *s;
5476 struct ppc_link_hash_entry *eh;
5477 struct ppc_dyn_relocs *p;
5478 struct got_entry *gent;
5479
5480 if (h->root.type == bfd_link_hash_indirect)
5481 return TRUE;
5482
5483 if (h->root.type == bfd_link_hash_warning)
5484 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5485
5486 info = (struct bfd_link_info *) inf;
5487 htab = ppc_hash_table (info);
5488
5489 if (htab->elf.dynamic_sections_created
5490 && h->dynindx != -1
5491 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5492 {
5493 struct plt_entry *pent;
5494 bfd_boolean doneone = FALSE;
5495 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5496 if (pent->plt.refcount > 0)
5497 {
5498 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5499
5500 /* If this is the first .plt entry, make room for the special
5501 first entry. */
5502 s = htab->plt;
5503 if (s->_raw_size == 0)
5504 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5505
5506 pent->plt.offset = s->_raw_size;
5507
5508 /* Make room for this entry. */
5509 s->_raw_size += PLT_ENTRY_SIZE;
5510
5511 /* Make room for the .glink code. */
5512 s = htab->glink;
5513 if (s->_raw_size == 0)
5514 s->_raw_size += GLINK_CALL_STUB_SIZE;
5515 /* We need bigger stubs past index 32767. */
5516 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5517 s->_raw_size += 4;
5518 s->_raw_size += 2*4;
5519
5520 /* We also need to make an entry in the .rela.plt section. */
5521 s = htab->relplt;
5522 s->_raw_size += sizeof (Elf64_External_Rela);
5523 doneone = TRUE;
5524 }
5525 else
5526 pent->plt.offset = (bfd_vma) -1;
5527 if (!doneone)
5528 {
5529 h->plt.plist = NULL;
5530 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5531 }
5532 }
5533 else
5534 {
5535 h->plt.plist = NULL;
5536 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5537 }
5538
5539 eh = (struct ppc_link_hash_entry *) h;
5540 /* Run through the TLS GD got entries first if we're changing them
5541 to TPREL. */
5542 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5543 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5544 if (gent->got.refcount > 0
5545 && (gent->tls_type & TLS_GD) != 0)
5546 {
5547 /* This was a GD entry that has been converted to TPREL. If
5548 there happens to be a TPREL entry we can use that one. */
5549 struct got_entry *ent;
5550 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5551 if (ent->got.refcount > 0
5552 && (ent->tls_type & TLS_TPREL) != 0
5553 && ent->addend == gent->addend
5554 && ent->owner == gent->owner)
5555 {
5556 gent->got.refcount = 0;
5557 break;
5558 }
5559
5560 /* If not, then we'll be using our own TPREL entry. */
5561 if (gent->got.refcount != 0)
5562 gent->tls_type = TLS_TLS | TLS_TPREL;
5563 }
5564
5565 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5566 if (gent->got.refcount > 0)
5567 {
5568 bfd_boolean dyn;
5569
5570 /* Make sure this symbol is output as a dynamic symbol.
5571 Undefined weak syms won't yet be marked as dynamic,
5572 nor will all TLS symbols. */
5573 if (h->dynindx == -1
5574 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5575 {
5576 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5577 return FALSE;
5578 }
5579
5580 if ((gent->tls_type & TLS_LD) != 0
5581 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5582 {
5583 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5584 continue;
5585 }
5586
5587 s = ppc64_elf_tdata (gent->owner)->got;
5588 gent->got.offset = s->_raw_size;
5589 s->_raw_size
5590 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5591 dyn = htab->elf.dynamic_sections_created;
5592 if ((info->shared
5593 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5594 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5595 || h->root.type != bfd_link_hash_undefweak))
5596 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5597 += (gent->tls_type & eh->tls_mask & TLS_GD
5598 ? 2 * sizeof (Elf64_External_Rela)
5599 : sizeof (Elf64_External_Rela));
5600 }
5601 else
5602 gent->got.offset = (bfd_vma) -1;
5603
5604 if (eh->dyn_relocs == NULL)
5605 return TRUE;
5606
5607 /* In the shared -Bsymbolic case, discard space allocated for
5608 dynamic pc-relative relocs against symbols which turn out to be
5609 defined in regular objects. For the normal shared case, discard
5610 space for relocs that have become local due to symbol visibility
5611 changes. */
5612
5613 if (info->shared)
5614 {
5615 /* Relocs that use pc_count are those that appear on a call insn,
5616 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5617 generated via assembly. We want calls to protected symbols to
5618 resolve directly to the function rather than going via the plt.
5619 If people want function pointer comparisons to work as expected
5620 then they should avoid writing weird assembly. */
5621 if (SYMBOL_CALLS_LOCAL (info, h))
5622 {
5623 struct ppc_dyn_relocs **pp;
5624
5625 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5626 {
5627 p->count -= p->pc_count;
5628 p->pc_count = 0;
5629 if (p->count == 0)
5630 *pp = p->next;
5631 else
5632 pp = &p->next;
5633 }
5634 }
5635
5636 /* Also discard relocs on undefined weak syms with non-default
5637 visibility. */
5638 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5639 && h->root.type == bfd_link_hash_undefweak)
5640 eh->dyn_relocs = NULL;
5641 }
5642 else if (ELIMINATE_COPY_RELOCS)
5643 {
5644 /* For the non-shared case, discard space for relocs against
5645 symbols which turn out to need copy relocs or are not
5646 dynamic. */
5647
5648 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5649 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5650 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5651 {
5652 /* Make sure this symbol is output as a dynamic symbol.
5653 Undefined weak syms won't yet be marked as dynamic. */
5654 if (h->dynindx == -1
5655 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5656 {
5657 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5658 return FALSE;
5659 }
5660
5661 /* If that succeeded, we know we'll be keeping all the
5662 relocs. */
5663 if (h->dynindx != -1)
5664 goto keep;
5665 }
5666
5667 eh->dyn_relocs = NULL;
5668
5669 keep: ;
5670 }
5671
5672 /* Finally, allocate space. */
5673 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5674 {
5675 asection *sreloc = elf_section_data (p->sec)->sreloc;
5676 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5677 }
5678
5679 return TRUE;
5680 }
5681
5682 /* Find any dynamic relocs that apply to read-only sections. */
5683
5684 static bfd_boolean
5685 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5686 {
5687 struct ppc_link_hash_entry *eh;
5688 struct ppc_dyn_relocs *p;
5689
5690 if (h->root.type == bfd_link_hash_warning)
5691 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5692
5693 eh = (struct ppc_link_hash_entry *) h;
5694 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5695 {
5696 asection *s = p->sec->output_section;
5697
5698 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5699 {
5700 struct bfd_link_info *info = inf;
5701
5702 info->flags |= DF_TEXTREL;
5703
5704 /* Not an error, just cut short the traversal. */
5705 return FALSE;
5706 }
5707 }
5708 return TRUE;
5709 }
5710
5711 /* Set the sizes of the dynamic sections. */
5712
5713 static bfd_boolean
5714 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5715 struct bfd_link_info *info)
5716 {
5717 struct ppc_link_hash_table *htab;
5718 bfd *dynobj;
5719 asection *s;
5720 bfd_boolean relocs;
5721 bfd *ibfd;
5722
5723 htab = ppc_hash_table (info);
5724 dynobj = htab->elf.dynobj;
5725 if (dynobj == NULL)
5726 abort ();
5727
5728 if (htab->elf.dynamic_sections_created)
5729 {
5730 /* Set the contents of the .interp section to the interpreter. */
5731 if (info->executable)
5732 {
5733 s = bfd_get_section_by_name (dynobj, ".interp");
5734 if (s == NULL)
5735 abort ();
5736 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5737 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5738 }
5739 }
5740
5741 /* Set up .got offsets for local syms, and space for local dynamic
5742 relocs. */
5743 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5744 {
5745 struct got_entry **lgot_ents;
5746 struct got_entry **end_lgot_ents;
5747 char *lgot_masks;
5748 bfd_size_type locsymcount;
5749 Elf_Internal_Shdr *symtab_hdr;
5750 asection *srel;
5751
5752 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5753 continue;
5754
5755 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5756 {
5757 s = ppc64_elf_tdata (ibfd)->got;
5758 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5759 s->_raw_size += 16;
5760 if (info->shared)
5761 {
5762 srel = ppc64_elf_tdata (ibfd)->relgot;
5763 srel->_raw_size += sizeof (Elf64_External_Rela);
5764 }
5765 }
5766 else
5767 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5768
5769 for (s = ibfd->sections; s != NULL; s = s->next)
5770 {
5771 struct ppc_dyn_relocs *p;
5772
5773 for (p = *((struct ppc_dyn_relocs **)
5774 &elf_section_data (s)->local_dynrel);
5775 p != NULL;
5776 p = p->next)
5777 {
5778 if (!bfd_is_abs_section (p->sec)
5779 && bfd_is_abs_section (p->sec->output_section))
5780 {
5781 /* Input section has been discarded, either because
5782 it is a copy of a linkonce section or due to
5783 linker script /DISCARD/, so we'll be discarding
5784 the relocs too. */
5785 }
5786 else if (p->count != 0)
5787 {
5788 srel = elf_section_data (p->sec)->sreloc;
5789 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5790 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5791 info->flags |= DF_TEXTREL;
5792 }
5793 }
5794 }
5795
5796 lgot_ents = elf_local_got_ents (ibfd);
5797 if (!lgot_ents)
5798 continue;
5799
5800 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5801 locsymcount = symtab_hdr->sh_info;
5802 end_lgot_ents = lgot_ents + locsymcount;
5803 lgot_masks = (char *) end_lgot_ents;
5804 s = ppc64_elf_tdata (ibfd)->got;
5805 srel = ppc64_elf_tdata (ibfd)->relgot;
5806 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5807 {
5808 struct got_entry *ent;
5809
5810 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5811 if (ent->got.refcount > 0)
5812 {
5813 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5814 {
5815 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5816 {
5817 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5818 s->_raw_size += 16;
5819 if (info->shared)
5820 srel->_raw_size += sizeof (Elf64_External_Rela);
5821 }
5822 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5823 }
5824 else
5825 {
5826 ent->got.offset = s->_raw_size;
5827 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5828 {
5829 s->_raw_size += 16;
5830 if (info->shared)
5831 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5832 }
5833 else
5834 {
5835 s->_raw_size += 8;
5836 if (info->shared)
5837 srel->_raw_size += sizeof (Elf64_External_Rela);
5838 }
5839 }
5840 }
5841 else
5842 ent->got.offset = (bfd_vma) -1;
5843 }
5844 }
5845
5846 /* Allocate global sym .plt and .got entries, and space for global
5847 sym dynamic relocs. */
5848 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5849
5850 /* We now have determined the sizes of the various dynamic sections.
5851 Allocate memory for them. */
5852 relocs = FALSE;
5853 for (s = dynobj->sections; s != NULL; s = s->next)
5854 {
5855 if ((s->flags & SEC_LINKER_CREATED) == 0)
5856 continue;
5857
5858 /* Reset _cooked_size since prelim layout will set it wrongly,
5859 and a non-zero _cooked_size sticks. */
5860 s->_cooked_size = 0;
5861
5862 if (s == htab->brlt || s == htab->relbrlt)
5863 /* These haven't been allocated yet; don't strip. */
5864 continue;
5865 else if (s == htab->got
5866 || s == htab->plt
5867 || s == htab->glink)
5868 {
5869 /* Strip this section if we don't need it; see the
5870 comment below. */
5871 }
5872 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5873 {
5874 if (s->_raw_size == 0)
5875 {
5876 /* If we don't need this section, strip it from the
5877 output file. This is mostly to handle .rela.bss and
5878 .rela.plt. We must create both sections in
5879 create_dynamic_sections, because they must be created
5880 before the linker maps input sections to output
5881 sections. The linker does that before
5882 adjust_dynamic_symbol is called, and it is that
5883 function which decides whether anything needs to go
5884 into these sections. */
5885 }
5886 else
5887 {
5888 if (s != htab->relplt)
5889 relocs = TRUE;
5890
5891 /* We use the reloc_count field as a counter if we need
5892 to copy relocs into the output file. */
5893 s->reloc_count = 0;
5894 }
5895 }
5896 else
5897 {
5898 /* It's not one of our sections, so don't allocate space. */
5899 continue;
5900 }
5901
5902 if (s->_raw_size == 0)
5903 {
5904 _bfd_strip_section_from_output (info, s);
5905 continue;
5906 }
5907
5908 /* .plt is in the bss section. We don't initialise it. */
5909 if ((s->flags & SEC_LOAD) == 0)
5910 continue;
5911
5912 /* Allocate memory for the section contents. We use bfd_zalloc
5913 here in case unused entries are not reclaimed before the
5914 section's contents are written out. This should not happen,
5915 but this way if it does we get a R_PPC64_NONE reloc in .rela
5916 sections instead of garbage.
5917 We also rely on the section contents being zero when writing
5918 the GOT. */
5919 s->contents = bfd_zalloc (dynobj, s->_raw_size);
5920 if (s->contents == NULL)
5921 return FALSE;
5922 }
5923
5924 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5925 {
5926 s = ppc64_elf_tdata (ibfd)->got;
5927 if (s != NULL && s != htab->got)
5928 {
5929 s->_cooked_size = 0;
5930 if (s->_raw_size == 0)
5931 _bfd_strip_section_from_output (info, s);
5932 else
5933 {
5934 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5935 if (s->contents == NULL)
5936 return FALSE;
5937 }
5938 }
5939 s = ppc64_elf_tdata (ibfd)->relgot;
5940 if (s != NULL)
5941 {
5942 s->_cooked_size = 0;
5943 if (s->_raw_size == 0)
5944 _bfd_strip_section_from_output (info, s);
5945 else
5946 {
5947 s->contents = bfd_zalloc (ibfd, s->_raw_size);
5948 if (s->contents == NULL)
5949 return FALSE;
5950 relocs = TRUE;
5951 s->reloc_count = 0;
5952 }
5953 }
5954 }
5955
5956 if (htab->elf.dynamic_sections_created)
5957 {
5958 /* Add some entries to the .dynamic section. We fill in the
5959 values later, in ppc64_elf_finish_dynamic_sections, but we
5960 must add the entries now so that we get the correct size for
5961 the .dynamic section. The DT_DEBUG entry is filled in by the
5962 dynamic linker and used by the debugger. */
5963 #define add_dynamic_entry(TAG, VAL) \
5964 bfd_elf64_add_dynamic_entry (info, (TAG), (VAL))
5965
5966 if (info->executable)
5967 {
5968 if (!add_dynamic_entry (DT_DEBUG, 0))
5969 return FALSE;
5970 }
5971
5972 if (htab->plt != NULL && htab->plt->_raw_size != 0)
5973 {
5974 if (!add_dynamic_entry (DT_PLTGOT, 0)
5975 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5976 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5977 || !add_dynamic_entry (DT_JMPREL, 0)
5978 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
5979 return FALSE;
5980 }
5981
5982 if (NO_OPD_RELOCS)
5983 {
5984 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
5985 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
5986 return FALSE;
5987 }
5988
5989 if (relocs)
5990 {
5991 if (!add_dynamic_entry (DT_RELA, 0)
5992 || !add_dynamic_entry (DT_RELASZ, 0)
5993 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
5994 return FALSE;
5995
5996 /* If any dynamic relocs apply to a read-only section,
5997 then we need a DT_TEXTREL entry. */
5998 if ((info->flags & DF_TEXTREL) == 0)
5999 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6000
6001 if ((info->flags & DF_TEXTREL) != 0)
6002 {
6003 if (!add_dynamic_entry (DT_TEXTREL, 0))
6004 return FALSE;
6005 }
6006 }
6007 }
6008 #undef add_dynamic_entry
6009
6010 return TRUE;
6011 }
6012
6013 /* Determine the type of stub needed, if any, for a call. */
6014
6015 static inline enum ppc_stub_type
6016 ppc_type_of_stub (asection *input_sec,
6017 const Elf_Internal_Rela *rel,
6018 struct ppc_link_hash_entry **hash,
6019 bfd_vma destination)
6020 {
6021 struct ppc_link_hash_entry *h = *hash;
6022 bfd_vma location;
6023 bfd_vma branch_offset;
6024 bfd_vma max_branch_offset;
6025 enum elf_ppc64_reloc_type r_type;
6026
6027 if (h != NULL)
6028 {
6029 if (h->oh != NULL
6030 && h->oh->dynindx != -1)
6031 {
6032 struct plt_entry *ent;
6033 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6034 if (ent->addend == rel->r_addend
6035 && ent->plt.offset != (bfd_vma) -1)
6036 {
6037 *hash = (struct ppc_link_hash_entry *) h->oh;
6038 return ppc_stub_plt_call;
6039 }
6040 }
6041
6042 if (h->elf.root.type != bfd_link_hash_defined
6043 && h->elf.root.type != bfd_link_hash_defweak)
6044 return ppc_stub_none;
6045 }
6046
6047 /* Determine where the call point is. */
6048 location = (input_sec->output_offset
6049 + input_sec->output_section->vma
6050 + rel->r_offset);
6051
6052 branch_offset = destination - location;
6053 r_type = ELF64_R_TYPE (rel->r_info);
6054
6055 /* Determine if a long branch stub is needed. */
6056 max_branch_offset = 1 << 25;
6057 if (r_type != R_PPC64_REL24)
6058 max_branch_offset = 1 << 15;
6059
6060 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6061 /* We need a stub. Figure out whether a long_branch or plt_branch
6062 is needed later. */
6063 return ppc_stub_long_branch;
6064
6065 return ppc_stub_none;
6066 }
6067
6068 /* Build a .plt call stub. */
6069
6070 static inline bfd_byte *
6071 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6072 {
6073 #define PPC_LO(v) ((v) & 0xffff)
6074 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6075 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6076
6077 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6078 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6079 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6080 if (PPC_HA (offset + 8) != PPC_HA (offset))
6081 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6082 offset += 8;
6083 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6084 if (PPC_HA (offset + 8) != PPC_HA (offset))
6085 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6086 offset += 8;
6087 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6088 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6089 bfd_put_32 (obfd, BCTR, p), p += 4;
6090 return p;
6091 }
6092
6093 static bfd_boolean
6094 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6095 {
6096 struct ppc_stub_hash_entry *stub_entry;
6097 struct ppc_branch_hash_entry *br_entry;
6098 struct bfd_link_info *info;
6099 struct ppc_link_hash_table *htab;
6100 bfd_byte *loc;
6101 bfd_byte *p;
6102 unsigned int indx;
6103 struct plt_entry *ent;
6104 bfd_vma off;
6105 int size;
6106
6107 /* Massage our args to the form they really have. */
6108 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6109 info = in_arg;
6110
6111 htab = ppc_hash_table (info);
6112
6113 /* Make a note of the offset within the stubs for this entry. */
6114 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size;
6115 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6116
6117 htab->stub_count[stub_entry->stub_type - 1] += 1;
6118 switch (stub_entry->stub_type)
6119 {
6120 case ppc_stub_long_branch:
6121 case ppc_stub_long_branch_r2off:
6122 /* Branches are relative. This is where we are going to. */
6123 off = (stub_entry->target_value
6124 + stub_entry->target_section->output_offset
6125 + stub_entry->target_section->output_section->vma);
6126
6127 /* And this is where we are coming from. */
6128 off -= (stub_entry->stub_offset
6129 + stub_entry->stub_sec->output_offset
6130 + stub_entry->stub_sec->output_section->vma);
6131
6132 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6133 size = 4;
6134 else
6135 {
6136 bfd_vma r2off;
6137
6138 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6139 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6140 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6141 loc += 4;
6142 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6143 loc += 4;
6144 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6145 loc += 4;
6146 off -= 12;
6147 size = 16;
6148 }
6149 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6150
6151 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6152 break;
6153
6154 case ppc_stub_plt_branch:
6155 case ppc_stub_plt_branch_r2off:
6156 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6157 stub_entry->root.string + 9,
6158 FALSE, FALSE);
6159 if (br_entry == NULL)
6160 {
6161 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6162 stub_entry->root.string + 9);
6163 htab->stub_error = TRUE;
6164 return FALSE;
6165 }
6166
6167 off = (stub_entry->target_value
6168 + stub_entry->target_section->output_offset
6169 + stub_entry->target_section->output_section->vma);
6170
6171 bfd_put_64 (htab->brlt->owner, off,
6172 htab->brlt->contents + br_entry->offset);
6173
6174 if (info->shared)
6175 {
6176 /* Create a reloc for the branch lookup table entry. */
6177 Elf_Internal_Rela rela;
6178 bfd_byte *rl;
6179
6180 rela.r_offset = (br_entry->offset
6181 + htab->brlt->output_offset
6182 + htab->brlt->output_section->vma);
6183 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6184 rela.r_addend = off;
6185
6186 rl = htab->relbrlt->contents;
6187 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6188 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6189 }
6190
6191 off = (br_entry->offset
6192 + htab->brlt->output_offset
6193 + htab->brlt->output_section->vma
6194 - elf_gp (htab->brlt->output_section->owner)
6195 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6196
6197 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6198 {
6199 (*_bfd_error_handler)
6200 (_("linkage table error against `%s'"),
6201 stub_entry->root.string);
6202 bfd_set_error (bfd_error_bad_value);
6203 htab->stub_error = TRUE;
6204 return FALSE;
6205 }
6206
6207 indx = off;
6208 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6209 {
6210 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6211 loc += 4;
6212 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6213 size = 16;
6214 }
6215 else
6216 {
6217 bfd_vma r2off;
6218
6219 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6220 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6221 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6222 loc += 4;
6223 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6224 loc += 4;
6225 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6226 loc += 4;
6227 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6228 loc += 4;
6229 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6230 size = 28;
6231 }
6232 loc += 4;
6233 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6234 loc += 4;
6235 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6236 break;
6237
6238 case ppc_stub_plt_call:
6239 /* Do the best we can for shared libraries built without
6240 exporting ".foo" for each "foo". This can happen when symbol
6241 versioning scripts strip all bar a subset of symbols. */
6242 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6243 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6244 {
6245 /* Point the symbol at the stub. There may be multiple stubs,
6246 we don't really care; The main thing is to make this sym
6247 defined somewhere. Maybe defining the symbol in the stub
6248 section is a silly idea. If we didn't do this, htab->top_id
6249 could disappear. */
6250 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6251 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6252 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6253 }
6254
6255 /* Now build the stub. */
6256 off = (bfd_vma) -1;
6257 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6258 if (ent->addend == stub_entry->addend)
6259 {
6260 off = ent->plt.offset;
6261 break;
6262 }
6263 if (off >= (bfd_vma) -2)
6264 abort ();
6265
6266 off &= ~ (bfd_vma) 1;
6267 off += (htab->plt->output_offset
6268 + htab->plt->output_section->vma
6269 - elf_gp (htab->plt->output_section->owner)
6270 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6271
6272 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6273 {
6274 (*_bfd_error_handler)
6275 (_("linkage table error against `%s'"),
6276 stub_entry->h->elf.root.root.string);
6277 bfd_set_error (bfd_error_bad_value);
6278 htab->stub_error = TRUE;
6279 return FALSE;
6280 }
6281
6282 p = build_plt_stub (htab->stub_bfd, loc, off);
6283 size = p - loc;
6284 break;
6285
6286 default:
6287 BFD_FAIL ();
6288 return FALSE;
6289 }
6290
6291 stub_entry->stub_sec->_cooked_size += size;
6292
6293 if (htab->emit_stub_syms
6294 && !(stub_entry->stub_type == ppc_stub_plt_call
6295 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6296 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6297 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6298 {
6299 struct elf_link_hash_entry *h;
6300 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6301 TRUE, FALSE, FALSE);
6302 if (h == NULL)
6303 return FALSE;
6304 if (h->root.type == bfd_link_hash_new)
6305 {
6306 h->root.type = bfd_link_hash_defined;
6307 h->root.u.def.section = stub_entry->stub_sec;
6308 h->root.u.def.value = stub_entry->stub_offset;
6309 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6310 | ELF_LINK_HASH_DEF_REGULAR
6311 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6312 | ELF_LINK_FORCED_LOCAL);
6313 }
6314 }
6315
6316 return TRUE;
6317 }
6318
6319 /* As above, but don't actually build the stub. Just bump offset so
6320 we know stub section sizes, and select plt_branch stubs where
6321 long_branch stubs won't do. */
6322
6323 static bfd_boolean
6324 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6325 {
6326 struct ppc_stub_hash_entry *stub_entry;
6327 struct ppc_link_hash_table *htab;
6328 bfd_vma off;
6329 int size;
6330
6331 /* Massage our args to the form they really have. */
6332 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6333 htab = in_arg;
6334
6335 if (stub_entry->stub_type == ppc_stub_plt_call)
6336 {
6337 struct plt_entry *ent;
6338 off = (bfd_vma) -1;
6339 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6340 if (ent->addend == stub_entry->addend)
6341 {
6342 off = ent->plt.offset & ~(bfd_vma) 1;
6343 break;
6344 }
6345 if (off >= (bfd_vma) -2)
6346 abort ();
6347 off += (htab->plt->output_offset
6348 + htab->plt->output_section->vma
6349 - elf_gp (htab->plt->output_section->owner)
6350 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6351
6352 size = PLT_CALL_STUB_SIZE;
6353 if (PPC_HA (off + 16) != PPC_HA (off))
6354 size += 4;
6355 }
6356 else
6357 {
6358 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6359 variants. */
6360 off = (stub_entry->target_value
6361 + stub_entry->target_section->output_offset
6362 + stub_entry->target_section->output_section->vma);
6363 off -= (stub_entry->stub_sec->_raw_size
6364 + stub_entry->stub_sec->output_offset
6365 + stub_entry->stub_sec->output_section->vma);
6366
6367 /* Reset the stub type from the plt variant in case we now
6368 can reach with a shorter stub. */
6369 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6370 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6371
6372 size = 4;
6373 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6374 {
6375 off -= 12;
6376 size = 16;
6377 }
6378
6379 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6380 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6381 {
6382 struct ppc_branch_hash_entry *br_entry;
6383
6384 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6385 stub_entry->root.string + 9,
6386 TRUE, FALSE);
6387 if (br_entry == NULL)
6388 {
6389 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6390 stub_entry->root.string + 9);
6391 htab->stub_error = TRUE;
6392 return FALSE;
6393 }
6394
6395 if (br_entry->iter != htab->stub_iteration)
6396 {
6397 br_entry->iter = htab->stub_iteration;
6398 br_entry->offset = htab->brlt->_raw_size;
6399 htab->brlt->_raw_size += 8;
6400 }
6401
6402 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6403 size = 16;
6404 if (stub_entry->stub_type != ppc_stub_plt_branch)
6405 size = 28;
6406 }
6407 }
6408
6409 stub_entry->stub_sec->_raw_size += size;
6410 return TRUE;
6411 }
6412
6413 /* Set up various things so that we can make a list of input sections
6414 for each output section included in the link. Returns -1 on error,
6415 0 when no stubs will be needed, and 1 on success. */
6416
6417 int
6418 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6419 {
6420 bfd *input_bfd;
6421 int top_id, top_index, id;
6422 asection *section;
6423 asection **input_list;
6424 bfd_size_type amt;
6425 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6426
6427 if (htab->brlt == NULL)
6428 return 0;
6429
6430 /* Find the top input section id. */
6431 for (input_bfd = info->input_bfds, top_id = 3;
6432 input_bfd != NULL;
6433 input_bfd = input_bfd->link_next)
6434 {
6435 for (section = input_bfd->sections;
6436 section != NULL;
6437 section = section->next)
6438 {
6439 if (top_id < section->id)
6440 top_id = section->id;
6441 }
6442 }
6443
6444 htab->top_id = top_id;
6445 amt = sizeof (struct map_stub) * (top_id + 1);
6446 htab->stub_group = bfd_zmalloc (amt);
6447 if (htab->stub_group == NULL)
6448 return -1;
6449
6450 /* Set toc_off for com, und, abs and ind sections. */
6451 for (id = 0; id < 3; id++)
6452 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6453
6454 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6455
6456 /* We can't use output_bfd->section_count here to find the top output
6457 section index as some sections may have been removed, and
6458 _bfd_strip_section_from_output doesn't renumber the indices. */
6459 for (section = output_bfd->sections, top_index = 0;
6460 section != NULL;
6461 section = section->next)
6462 {
6463 if (top_index < section->index)
6464 top_index = section->index;
6465 }
6466
6467 htab->top_index = top_index;
6468 amt = sizeof (asection *) * (top_index + 1);
6469 input_list = bfd_zmalloc (amt);
6470 htab->input_list = input_list;
6471 if (input_list == NULL)
6472 return -1;
6473
6474 return 1;
6475 }
6476
6477 /* The linker repeatedly calls this function for each TOC input section
6478 and linker generated GOT section. Group input bfds such that the toc
6479 within a group is less than 64k in size. Will break with cute linker
6480 scripts that play games with dot in the output toc section. */
6481
6482 void
6483 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6484 {
6485 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6486
6487 if (!htab->no_multi_toc)
6488 {
6489 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6490 bfd_vma off = addr - htab->toc_curr;
6491 if (off + isec->_raw_size > 0x10000)
6492 {
6493 htab->toc_curr = addr;
6494 htab->multi_toc_needed = 1;
6495 }
6496 elf_gp (isec->owner) = (htab->toc_curr
6497 - elf_gp (isec->output_section->owner)
6498 + TOC_BASE_OFF);
6499 }
6500 }
6501
6502 /* Called after the last call to the above function. */
6503
6504 void
6505 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6506 struct bfd_link_info *info)
6507 {
6508 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6509
6510 /* toc_curr tracks the TOC offset used for code sections below in
6511 ppc64_elf_next_input_section. Start off at 0x8000. */
6512 htab->toc_curr = TOC_BASE_OFF;
6513 }
6514
6515 /* No toc references were found in ISEC. If the code in ISEC makes no
6516 calls, then there's no need to use toc adjusting stubs when branching
6517 into ISEC. Actually, indirect calls from ISEC are OK as they will
6518 load r2. */
6519
6520 static int
6521 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6522 {
6523 bfd_byte *contents;
6524 bfd_size_type i;
6525 int ret;
6526 int branch_ok;
6527
6528 /* We know none of our code bearing sections will need toc stubs. */
6529 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6530 return 0;
6531
6532 /* Hack for linux kernel. .fixup contains branches, but only back to
6533 the function that hit an exception. */
6534 branch_ok = strcmp (isec->name, ".fixup") == 0;
6535
6536 contents = elf_section_data (isec)->this_hdr.contents;
6537 if (contents == NULL)
6538 {
6539 contents = bfd_malloc (isec->_raw_size);
6540 if (contents == NULL)
6541 return -1;
6542 if (! bfd_get_section_contents (isec->owner, isec, contents,
6543 0, isec->_raw_size))
6544 {
6545 free (contents);
6546 return -1;
6547 }
6548 if (info->keep_memory)
6549 elf_section_data (isec)->this_hdr.contents = contents;
6550 }
6551
6552 /* Code scan, because we don't necessarily have relocs on calls to
6553 static functions. */
6554 ret = 0;
6555 for (i = 0; i < isec->_raw_size; i += 4)
6556 {
6557 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6558 /* Is this a branch? */
6559 if ((insn & (0x3f << 26)) == (18 << 26)
6560 /* If branch and link, it's a function call. */
6561 && ((insn & 1) != 0
6562 /* Sibling calls use a plain branch. I don't know a way
6563 of deciding whether a branch is really a sibling call. */
6564 || !branch_ok))
6565 {
6566 ret = 1;
6567 break;
6568 }
6569 }
6570
6571 if (elf_section_data (isec)->this_hdr.contents != contents)
6572 free (contents);
6573 return ret;
6574 }
6575
6576 /* The linker repeatedly calls this function for each input section,
6577 in the order that input sections are linked into output sections.
6578 Build lists of input sections to determine groupings between which
6579 we may insert linker stubs. */
6580
6581 bfd_boolean
6582 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6583 {
6584 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6585 int ret;
6586
6587 if ((isec->output_section->flags & SEC_CODE) != 0
6588 && isec->output_section->index <= htab->top_index)
6589 {
6590 asection **list = htab->input_list + isec->output_section->index;
6591 /* Steal the link_sec pointer for our list. */
6592 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6593 /* This happens to make the list in reverse order,
6594 which is what we want. */
6595 PREV_SEC (isec) = *list;
6596 *list = isec;
6597 }
6598
6599 /* If a code section has a function that uses the TOC then we need
6600 to use the right TOC (obviously). Also, make sure that .opd gets
6601 the correct TOC value for R_PPC64_TOC relocs that don't have or
6602 can't find their function symbol (shouldn't ever happen now). */
6603 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6604 {
6605 if (elf_gp (isec->owner) != 0)
6606 htab->toc_curr = elf_gp (isec->owner);
6607 }
6608 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6609 return FALSE;
6610 else
6611 isec->has_gp_reloc = ret;
6612
6613 /* Functions that don't use the TOC can belong in any TOC group.
6614 Use the last TOC base. This happens to make _init and _fini
6615 pasting work. */
6616 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6617 return TRUE;
6618 }
6619
6620 /* See whether we can group stub sections together. Grouping stub
6621 sections may result in fewer stubs. More importantly, we need to
6622 put all .init* and .fini* stubs at the beginning of the .init or
6623 .fini output sections respectively, because glibc splits the
6624 _init and _fini functions into multiple parts. Putting a stub in
6625 the middle of a function is not a good idea. */
6626
6627 static void
6628 group_sections (struct ppc_link_hash_table *htab,
6629 bfd_size_type stub_group_size,
6630 bfd_boolean stubs_always_before_branch)
6631 {
6632 asection **list = htab->input_list + htab->top_index;
6633 do
6634 {
6635 asection *tail = *list;
6636 while (tail != NULL)
6637 {
6638 asection *curr;
6639 asection *prev;
6640 bfd_size_type total;
6641 bfd_boolean big_sec;
6642 bfd_vma curr_toc;
6643
6644 curr = tail;
6645 if (tail->_cooked_size)
6646 total = tail->_cooked_size;
6647 else
6648 total = tail->_raw_size;
6649 big_sec = total >= stub_group_size;
6650 curr_toc = htab->stub_group[tail->id].toc_off;
6651
6652 while ((prev = PREV_SEC (curr)) != NULL
6653 && ((total += curr->output_offset - prev->output_offset)
6654 < stub_group_size)
6655 && htab->stub_group[prev->id].toc_off == curr_toc)
6656 curr = prev;
6657
6658 /* OK, the size from the start of CURR to the end is less
6659 than stub_group_size and thus can be handled by one stub
6660 section. (or the tail section is itself larger than
6661 stub_group_size, in which case we may be toast.) We
6662 should really be keeping track of the total size of stubs
6663 added here, as stubs contribute to the final output
6664 section size. That's a little tricky, and this way will
6665 only break if stubs added make the total size more than
6666 2^25, ie. for the default stub_group_size, if stubs total
6667 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6668 do
6669 {
6670 prev = PREV_SEC (tail);
6671 /* Set up this stub group. */
6672 htab->stub_group[tail->id].link_sec = curr;
6673 }
6674 while (tail != curr && (tail = prev) != NULL);
6675
6676 /* But wait, there's more! Input sections up to stub_group_size
6677 bytes before the stub section can be handled by it too.
6678 Don't do this if we have a really large section after the
6679 stubs, as adding more stubs increases the chance that
6680 branches may not reach into the stub section. */
6681 if (!stubs_always_before_branch && !big_sec)
6682 {
6683 total = 0;
6684 while (prev != NULL
6685 && ((total += tail->output_offset - prev->output_offset)
6686 < stub_group_size)
6687 && htab->stub_group[prev->id].toc_off == curr_toc)
6688 {
6689 tail = prev;
6690 prev = PREV_SEC (tail);
6691 htab->stub_group[tail->id].link_sec = curr;
6692 }
6693 }
6694 tail = prev;
6695 }
6696 }
6697 while (list-- != htab->input_list);
6698 free (htab->input_list);
6699 #undef PREV_SEC
6700 }
6701
6702 /* Determine and set the size of the stub section for a final link.
6703
6704 The basic idea here is to examine all the relocations looking for
6705 PC-relative calls to a target that is unreachable with a "bl"
6706 instruction. */
6707
6708 bfd_boolean
6709 ppc64_elf_size_stubs (bfd *output_bfd,
6710 struct bfd_link_info *info,
6711 bfd_signed_vma group_size,
6712 asection *(*add_stub_section) (const char *, asection *),
6713 void (*layout_sections_again) (void))
6714 {
6715 bfd_size_type stub_group_size;
6716 bfd_boolean stubs_always_before_branch;
6717 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6718
6719 /* Stash our params away. */
6720 htab->add_stub_section = add_stub_section;
6721 htab->layout_sections_again = layout_sections_again;
6722 stubs_always_before_branch = group_size < 0;
6723 if (group_size < 0)
6724 stub_group_size = -group_size;
6725 else
6726 stub_group_size = group_size;
6727 if (stub_group_size == 1)
6728 {
6729 /* Default values. */
6730 if (stubs_always_before_branch)
6731 {
6732 stub_group_size = 0x1e00000;
6733 if (htab->has_14bit_branch)
6734 stub_group_size = 0x7800;
6735 }
6736 else
6737 {
6738 stub_group_size = 0x1c00000;
6739 if (htab->has_14bit_branch)
6740 stub_group_size = 0x7000;
6741 }
6742 }
6743
6744 group_sections (htab, stub_group_size, stubs_always_before_branch);
6745
6746 while (1)
6747 {
6748 bfd *input_bfd;
6749 unsigned int bfd_indx;
6750 asection *stub_sec;
6751 bfd_boolean stub_changed;
6752
6753 htab->stub_iteration += 1;
6754 stub_changed = FALSE;
6755
6756 for (input_bfd = info->input_bfds, bfd_indx = 0;
6757 input_bfd != NULL;
6758 input_bfd = input_bfd->link_next, bfd_indx++)
6759 {
6760 Elf_Internal_Shdr *symtab_hdr;
6761 asection *section;
6762 Elf_Internal_Sym *local_syms = NULL;
6763
6764 /* We'll need the symbol table in a second. */
6765 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6766 if (symtab_hdr->sh_info == 0)
6767 continue;
6768
6769 /* Walk over each section attached to the input bfd. */
6770 for (section = input_bfd->sections;
6771 section != NULL;
6772 section = section->next)
6773 {
6774 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6775
6776 /* If there aren't any relocs, then there's nothing more
6777 to do. */
6778 if ((section->flags & SEC_RELOC) == 0
6779 || section->reloc_count == 0)
6780 continue;
6781
6782 /* If this section is a link-once section that will be
6783 discarded, then don't create any stubs. */
6784 if (section->output_section == NULL
6785 || section->output_section->owner != output_bfd)
6786 continue;
6787
6788 /* Get the relocs. */
6789 internal_relocs
6790 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6791 info->keep_memory);
6792 if (internal_relocs == NULL)
6793 goto error_ret_free_local;
6794
6795 /* Now examine each relocation. */
6796 irela = internal_relocs;
6797 irelaend = irela + section->reloc_count;
6798 for (; irela < irelaend; irela++)
6799 {
6800 enum elf_ppc64_reloc_type r_type;
6801 unsigned int r_indx;
6802 enum ppc_stub_type stub_type;
6803 struct ppc_stub_hash_entry *stub_entry;
6804 asection *sym_sec;
6805 bfd_vma sym_value;
6806 bfd_vma destination;
6807 struct ppc_link_hash_entry *hash;
6808 struct elf_link_hash_entry *h;
6809 Elf_Internal_Sym *sym;
6810 char *stub_name;
6811 const asection *id_sec;
6812
6813 r_type = ELF64_R_TYPE (irela->r_info);
6814 r_indx = ELF64_R_SYM (irela->r_info);
6815
6816 if (r_type >= R_PPC64_max)
6817 {
6818 bfd_set_error (bfd_error_bad_value);
6819 goto error_ret_free_internal;
6820 }
6821
6822 /* Only look for stubs on branch instructions. */
6823 if (r_type != R_PPC64_REL24
6824 && r_type != R_PPC64_REL14
6825 && r_type != R_PPC64_REL14_BRTAKEN
6826 && r_type != R_PPC64_REL14_BRNTAKEN)
6827 continue;
6828
6829 /* Now determine the call target, its name, value,
6830 section. */
6831 destination = 0;
6832 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6833 r_indx, input_bfd))
6834 goto error_ret_free_internal;
6835 hash = (struct ppc_link_hash_entry *) h;
6836
6837 if (hash == NULL)
6838 {
6839 /* It's a local symbol. */
6840 sym_value = sym->st_value;
6841 destination = (sym_value + irela->r_addend
6842 + sym_sec->output_offset
6843 + sym_sec->output_section->vma);
6844 }
6845 else
6846 {
6847 /* It's an external symbol. */
6848 sym_value = 0;
6849 if (hash->elf.root.type == bfd_link_hash_defined
6850 || hash->elf.root.type == bfd_link_hash_defweak)
6851 {
6852 sym_value = hash->elf.root.u.def.value;
6853 if (sym_sec->output_section != NULL)
6854 destination = (sym_value + irela->r_addend
6855 + sym_sec->output_offset
6856 + sym_sec->output_section->vma);
6857 }
6858 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6859 ;
6860 else if (hash->elf.root.type == bfd_link_hash_undefined)
6861 ;
6862 else
6863 {
6864 bfd_set_error (bfd_error_bad_value);
6865 goto error_ret_free_internal;
6866 }
6867 }
6868
6869 /* Determine what (if any) linker stub is needed. */
6870 stub_type = ppc_type_of_stub (section, irela, &hash,
6871 destination);
6872
6873 if (stub_type != ppc_stub_plt_call)
6874 {
6875 /* Check whether we need a TOC adjusting stub.
6876 Since the linker pastes together pieces from
6877 different object files when creating the
6878 _init and _fini functions, it may be that a
6879 call to what looks like a local sym is in
6880 fact a call needing a TOC adjustment. */
6881 if (sym_sec != NULL
6882 && sym_sec->output_section != NULL
6883 && (htab->stub_group[sym_sec->id].toc_off
6884 != htab->stub_group[section->id].toc_off)
6885 && sym_sec->has_gp_reloc
6886 && section->has_gp_reloc)
6887 stub_type = ppc_stub_long_branch_r2off;
6888 }
6889
6890 if (stub_type == ppc_stub_none)
6891 continue;
6892
6893 /* __tls_get_addr calls might be eliminated. */
6894 if (stub_type != ppc_stub_plt_call
6895 && hash != NULL
6896 && &hash->elf == htab->tls_get_addr
6897 && section->has_tls_reloc
6898 && irela != internal_relocs)
6899 {
6900 /* Get tls info. */
6901 char *tls_mask;
6902
6903 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
6904 irela - 1, input_bfd))
6905 goto error_ret_free_internal;
6906 if (*tls_mask != 0)
6907 continue;
6908 }
6909
6910 /* Support for grouping stub sections. */
6911 id_sec = htab->stub_group[section->id].link_sec;
6912
6913 /* Get the name of this stub. */
6914 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
6915 if (!stub_name)
6916 goto error_ret_free_internal;
6917
6918 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
6919 stub_name, FALSE, FALSE);
6920 if (stub_entry != NULL)
6921 {
6922 /* The proper stub has already been created. */
6923 free (stub_name);
6924 continue;
6925 }
6926
6927 stub_entry = ppc_add_stub (stub_name, section, htab);
6928 if (stub_entry == NULL)
6929 {
6930 free (stub_name);
6931 error_ret_free_internal:
6932 if (elf_section_data (section)->relocs == NULL)
6933 free (internal_relocs);
6934 error_ret_free_local:
6935 if (local_syms != NULL
6936 && (symtab_hdr->contents
6937 != (unsigned char *) local_syms))
6938 free (local_syms);
6939 return FALSE;
6940 }
6941
6942 stub_entry->stub_type = stub_type;
6943 stub_entry->target_value = sym_value;
6944 stub_entry->target_section = sym_sec;
6945 stub_entry->h = hash;
6946 stub_entry->addend = irela->r_addend;
6947 stub_changed = TRUE;
6948 }
6949
6950 /* We're done with the internal relocs, free them. */
6951 if (elf_section_data (section)->relocs != internal_relocs)
6952 free (internal_relocs);
6953 }
6954
6955 if (local_syms != NULL
6956 && symtab_hdr->contents != (unsigned char *) local_syms)
6957 {
6958 if (!info->keep_memory)
6959 free (local_syms);
6960 else
6961 symtab_hdr->contents = (unsigned char *) local_syms;
6962 }
6963 }
6964
6965 if (!stub_changed)
6966 break;
6967
6968 /* OK, we've added some stubs. Find out the new size of the
6969 stub sections. */
6970 for (stub_sec = htab->stub_bfd->sections;
6971 stub_sec != NULL;
6972 stub_sec = stub_sec->next)
6973 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
6974 {
6975 stub_sec->_raw_size = 0;
6976 stub_sec->_cooked_size = 0;
6977 }
6978 htab->brlt->_raw_size = 0;
6979 htab->brlt->_cooked_size = 0;
6980
6981 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
6982
6983 /* Ask the linker to do its stuff. */
6984 (*htab->layout_sections_again) ();
6985 }
6986
6987 /* It would be nice to strip .branch_lt from the output if the
6988 section is empty, but it's too late. If we strip sections here,
6989 the dynamic symbol table is corrupted since the section symbol
6990 for the stripped section isn't written. */
6991
6992 return TRUE;
6993 }
6994
6995 /* Called after we have determined section placement. If sections
6996 move, we'll be called again. Provide a value for TOCstart. */
6997
6998 bfd_vma
6999 ppc64_elf_toc (bfd *obfd)
7000 {
7001 asection *s;
7002 bfd_vma TOCstart;
7003
7004 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7005 order. The TOC starts where the first of these sections starts. */
7006 s = bfd_get_section_by_name (obfd, ".got");
7007 if (s == NULL)
7008 s = bfd_get_section_by_name (obfd, ".toc");
7009 if (s == NULL)
7010 s = bfd_get_section_by_name (obfd, ".tocbss");
7011 if (s == NULL)
7012 s = bfd_get_section_by_name (obfd, ".plt");
7013 if (s == NULL)
7014 {
7015 /* This may happen for
7016 o references to TOC base (SYM@toc / TOC[tc0]) without a
7017 .toc directive
7018 o bad linker script
7019 o --gc-sections and empty TOC sections
7020
7021 FIXME: Warn user? */
7022
7023 /* Look for a likely section. We probably won't even be
7024 using TOCstart. */
7025 for (s = obfd->sections; s != NULL; s = s->next)
7026 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7027 == (SEC_ALLOC | SEC_SMALL_DATA))
7028 break;
7029 if (s == NULL)
7030 for (s = obfd->sections; s != NULL; s = s->next)
7031 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7032 == (SEC_ALLOC | SEC_SMALL_DATA))
7033 break;
7034 if (s == NULL)
7035 for (s = obfd->sections; s != NULL; s = s->next)
7036 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7037 break;
7038 if (s == NULL)
7039 for (s = obfd->sections; s != NULL; s = s->next)
7040 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7041 break;
7042 }
7043
7044 TOCstart = 0;
7045 if (s != NULL)
7046 TOCstart = s->output_section->vma + s->output_offset;
7047
7048 return TOCstart;
7049 }
7050
7051 /* Build all the stubs associated with the current output file.
7052 The stubs are kept in a hash table attached to the main linker
7053 hash table. This function is called via gldelf64ppc_finish. */
7054
7055 bfd_boolean
7056 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7057 struct bfd_link_info *info,
7058 char **stats)
7059 {
7060 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7061 asection *stub_sec;
7062 bfd_byte *p;
7063 int stub_sec_count = 0;
7064
7065 htab->emit_stub_syms = emit_stub_syms;
7066 for (stub_sec = htab->stub_bfd->sections;
7067 stub_sec != NULL;
7068 stub_sec = stub_sec->next)
7069 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7070 {
7071 bfd_size_type size;
7072
7073 /* Allocate memory to hold the linker stubs. */
7074 size = stub_sec->_raw_size;
7075 if (size != 0)
7076 {
7077 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7078 if (stub_sec->contents == NULL)
7079 return FALSE;
7080 }
7081 stub_sec->_cooked_size = 0;
7082 }
7083
7084 if (htab->plt != NULL)
7085 {
7086 unsigned int indx;
7087 bfd_vma plt0;
7088
7089 /* Build the .glink plt call stub. */
7090 plt0 = (htab->plt->output_section->vma
7091 + htab->plt->output_offset
7092 - (htab->glink->output_section->vma
7093 + htab->glink->output_offset
7094 + GLINK_CALL_STUB_SIZE));
7095 if (plt0 + 0x80008000 > 0xffffffff)
7096 {
7097 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7098 bfd_set_error (bfd_error_bad_value);
7099 return FALSE;
7100 }
7101
7102 if (htab->emit_stub_syms)
7103 {
7104 struct elf_link_hash_entry *h;
7105 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7106 if (h == NULL)
7107 return FALSE;
7108 if (h->root.type == bfd_link_hash_new)
7109 {
7110 h->root.type = bfd_link_hash_defined;
7111 h->root.u.def.section = htab->glink;
7112 h->root.u.def.value = 0;
7113 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7114 | ELF_LINK_HASH_DEF_REGULAR
7115 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7116 | ELF_LINK_FORCED_LOCAL);
7117 }
7118 }
7119 p = htab->glink->contents;
7120 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7121 p += 4;
7122 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7123 p += 4;
7124 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7125 p += 4;
7126 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7127 p += 4;
7128 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7129 p += 4;
7130 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7131 p += 4;
7132 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7133 p += 4;
7134 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7135 p += 4;
7136 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7137 p += 4;
7138 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7139 p += 4;
7140 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7141 p += 4;
7142 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7143 p += 4;
7144 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7145 p += 4;
7146 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7147 p += 4;
7148 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7149 p += 4;
7150 bfd_put_32 (htab->glink->owner, BCTR, p);
7151 p += 4;
7152
7153 /* Build the .glink lazy link call stubs. */
7154 indx = 0;
7155 while (p < htab->glink->contents + htab->glink->_raw_size)
7156 {
7157 if (indx < 0x8000)
7158 {
7159 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7160 p += 4;
7161 }
7162 else
7163 {
7164 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7165 p += 4;
7166 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7167 p += 4;
7168 }
7169 bfd_put_32 (htab->glink->owner,
7170 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7171 indx++;
7172 p += 4;
7173 }
7174 htab->glink->_cooked_size = p - htab->glink->contents;
7175 }
7176
7177 if (htab->brlt->_raw_size != 0)
7178 {
7179 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7180 htab->brlt->_raw_size);
7181 if (htab->brlt->contents == NULL)
7182 return FALSE;
7183 }
7184
7185 /* Build the stubs as directed by the stub hash table. */
7186 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7187
7188 for (stub_sec = htab->stub_bfd->sections;
7189 stub_sec != NULL;
7190 stub_sec = stub_sec->next)
7191 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7192 {
7193 stub_sec_count += 1;
7194 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7195 break;
7196 }
7197
7198 if (stub_sec != NULL
7199 || htab->glink->_raw_size != htab->glink->_cooked_size)
7200 {
7201 htab->stub_error = TRUE;
7202 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7203 }
7204
7205 if (htab->stub_error)
7206 return FALSE;
7207
7208 if (stats != NULL)
7209 {
7210 *stats = bfd_malloc (500);
7211 if (*stats == NULL)
7212 return FALSE;
7213
7214 sprintf (*stats, _("linker stubs in %u groups\n"
7215 " branch %lu\n"
7216 " toc adjust %lu\n"
7217 " long branch %lu\n"
7218 " long toc adj %lu\n"
7219 " plt call %lu"),
7220 stub_sec_count,
7221 htab->stub_count[ppc_stub_long_branch - 1],
7222 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7223 htab->stub_count[ppc_stub_plt_branch - 1],
7224 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7225 htab->stub_count[ppc_stub_plt_call - 1]);
7226 }
7227 return TRUE;
7228 }
7229
7230 /* The RELOCATE_SECTION function is called by the ELF backend linker
7231 to handle the relocations for a section.
7232
7233 The relocs are always passed as Rela structures; if the section
7234 actually uses Rel structures, the r_addend field will always be
7235 zero.
7236
7237 This function is responsible for adjust the section contents as
7238 necessary, and (if using Rela relocs and generating a
7239 relocatable output file) adjusting the reloc addend as
7240 necessary.
7241
7242 This function does not have to worry about setting the reloc
7243 address or the reloc symbol index.
7244
7245 LOCAL_SYMS is a pointer to the swapped in local symbols.
7246
7247 LOCAL_SECTIONS is an array giving the section in the input file
7248 corresponding to the st_shndx field of each local symbol.
7249
7250 The global hash table entry for the global symbols can be found
7251 via elf_sym_hashes (input_bfd).
7252
7253 When generating relocatable output, this function must handle
7254 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7255 going to be the section symbol corresponding to the output
7256 section, which means that the addend must be adjusted
7257 accordingly. */
7258
7259 static bfd_boolean
7260 ppc64_elf_relocate_section (bfd *output_bfd,
7261 struct bfd_link_info *info,
7262 bfd *input_bfd,
7263 asection *input_section,
7264 bfd_byte *contents,
7265 Elf_Internal_Rela *relocs,
7266 Elf_Internal_Sym *local_syms,
7267 asection **local_sections)
7268 {
7269 struct ppc_link_hash_table *htab;
7270 Elf_Internal_Shdr *symtab_hdr;
7271 struct elf_link_hash_entry **sym_hashes;
7272 Elf_Internal_Rela *rel;
7273 Elf_Internal_Rela *relend;
7274 Elf_Internal_Rela outrel;
7275 bfd_byte *loc;
7276 struct got_entry **local_got_ents;
7277 bfd_vma TOCstart;
7278 bfd_boolean ret = TRUE;
7279 bfd_boolean is_opd;
7280 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7281 bfd_boolean is_power4 = FALSE;
7282
7283 if (info->relocatable)
7284 return TRUE;
7285
7286 /* Initialize howto table if needed. */
7287 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7288 ppc_howto_init ();
7289
7290 htab = ppc_hash_table (info);
7291 local_got_ents = elf_local_got_ents (input_bfd);
7292 TOCstart = elf_gp (output_bfd);
7293 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7294 sym_hashes = elf_sym_hashes (input_bfd);
7295 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7296
7297 rel = relocs;
7298 relend = relocs + input_section->reloc_count;
7299 for (; rel < relend; rel++)
7300 {
7301 enum elf_ppc64_reloc_type r_type;
7302 bfd_vma addend;
7303 bfd_reloc_status_type r;
7304 Elf_Internal_Sym *sym;
7305 asection *sec;
7306 struct elf_link_hash_entry *h;
7307 struct elf_link_hash_entry *fdh;
7308 const char *sym_name;
7309 unsigned long r_symndx, toc_symndx;
7310 char tls_mask, tls_gd, tls_type;
7311 char sym_type;
7312 bfd_vma relocation;
7313 bfd_boolean unresolved_reloc;
7314 bfd_boolean warned;
7315 unsigned long insn, mask;
7316 struct ppc_stub_hash_entry *stub_entry;
7317 bfd_vma max_br_offset;
7318 bfd_vma from;
7319
7320 r_type = ELF64_R_TYPE (rel->r_info);
7321 r_symndx = ELF64_R_SYM (rel->r_info);
7322
7323 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7324 symbol of the previous ADDR64 reloc. The symbol gives us the
7325 proper TOC base to use. */
7326 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7327 && rel != relocs
7328 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7329 && is_opd)
7330 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7331
7332 sym = NULL;
7333 sec = NULL;
7334 h = NULL;
7335 sym_name = NULL;
7336 unresolved_reloc = FALSE;
7337 warned = FALSE;
7338
7339 if (r_symndx < symtab_hdr->sh_info)
7340 {
7341 /* It's a local symbol. */
7342 sym = local_syms + r_symndx;
7343 sec = local_sections[r_symndx];
7344 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7345 sym_type = ELF64_ST_TYPE (sym->st_info);
7346 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
7347 if (elf_section_data (sec) != NULL)
7348 {
7349 long *opd_sym_adjust;
7350
7351 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7352 if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
7353 relocation += opd_sym_adjust[sym->st_value / 24];
7354 }
7355 }
7356 else
7357 {
7358 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
7359 symtab_hdr, relocation, sec,
7360 unresolved_reloc, info,
7361 warned);
7362 sym_name = h->root.root.string;
7363 sym_type = h->type;
7364 }
7365
7366 /* TLS optimizations. Replace instruction sequences and relocs
7367 based on information we collected in tls_optimize. We edit
7368 RELOCS so that --emit-relocs will output something sensible
7369 for the final instruction stream. */
7370 tls_mask = 0;
7371 tls_gd = 0;
7372 toc_symndx = 0;
7373 if (IS_PPC64_TLS_RELOC (r_type))
7374 {
7375 if (h != NULL)
7376 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7377 else if (local_got_ents != NULL)
7378 {
7379 char *lgot_masks;
7380 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7381 tls_mask = lgot_masks[r_symndx];
7382 }
7383 if (tls_mask == 0 && r_type == R_PPC64_TLS)
7384 {
7385 /* Check for toc tls entries. */
7386 char *toc_tls;
7387
7388 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7389 rel, input_bfd))
7390 return FALSE;
7391
7392 if (toc_tls)
7393 tls_mask = *toc_tls;
7394 }
7395 }
7396
7397 /* Check that tls relocs are used with tls syms, and non-tls
7398 relocs are used with non-tls syms. */
7399 if (r_symndx != 0
7400 && r_type != R_PPC64_NONE
7401 && (h == NULL
7402 || h->root.type == bfd_link_hash_defined
7403 || h->root.type == bfd_link_hash_defweak)
7404 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7405 {
7406 if (r_type == R_PPC64_TLS && tls_mask != 0)
7407 /* R_PPC64_TLS is OK against a symbol in the TOC. */
7408 ;
7409 else
7410 (*_bfd_error_handler)
7411 (sym_type == STT_TLS
7412 ? _("%s(%s+0x%lx): %s used with TLS symbol %s")
7413 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"),
7414 bfd_archive_filename (input_bfd),
7415 input_section->name,
7416 (long) rel->r_offset,
7417 ppc64_elf_howto_table[r_type]->name,
7418 sym_name);
7419 }
7420
7421 /* Ensure reloc mapping code below stays sane. */
7422 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7423 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7424 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7425 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7426 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7427 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7428 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7429 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7430 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7431 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7432 abort ();
7433
7434 switch (r_type)
7435 {
7436 default:
7437 break;
7438
7439 case R_PPC64_TOC16:
7440 case R_PPC64_TOC16_LO:
7441 case R_PPC64_TOC16_DS:
7442 case R_PPC64_TOC16_LO_DS:
7443 {
7444 /* Check for toc tls entries. */
7445 char *toc_tls;
7446 int retval;
7447
7448 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7449 rel, input_bfd);
7450 if (retval == 0)
7451 return FALSE;
7452
7453 if (toc_tls)
7454 {
7455 tls_mask = *toc_tls;
7456 if (r_type == R_PPC64_TOC16_DS
7457 || r_type == R_PPC64_TOC16_LO_DS)
7458 {
7459 if (tls_mask != 0
7460 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7461 goto toctprel;
7462 }
7463 else
7464 {
7465 /* If we found a GD reloc pair, then we might be
7466 doing a GD->IE transition. */
7467 if (retval == 2)
7468 {
7469 tls_gd = TLS_TPRELGD;
7470 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7471 goto tls_get_addr_check;
7472 }
7473 else if (retval == 3)
7474 {
7475 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7476 goto tls_get_addr_check;
7477 }
7478 }
7479 }
7480 }
7481 break;
7482
7483 case R_PPC64_GOT_TPREL16_DS:
7484 case R_PPC64_GOT_TPREL16_LO_DS:
7485 if (tls_mask != 0
7486 && (tls_mask & TLS_TPREL) == 0)
7487 {
7488 toctprel:
7489 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7490 insn &= 31 << 21;
7491 insn |= 0x3c0d0000; /* addis 0,13,0 */
7492 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7493 r_type = R_PPC64_TPREL16_HA;
7494 if (toc_symndx != 0)
7495 {
7496 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7497 /* We changed the symbol. Start over in order to
7498 get h, sym, sec etc. right. */
7499 rel--;
7500 continue;
7501 }
7502 else
7503 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7504 }
7505 break;
7506
7507 case R_PPC64_TLS:
7508 if (tls_mask != 0
7509 && (tls_mask & TLS_TPREL) == 0)
7510 {
7511 bfd_vma rtra;
7512 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7513 if ((insn & ((0x3f << 26) | (31 << 11)))
7514 == ((31 << 26) | (13 << 11)))
7515 rtra = insn & ((1 << 26) - (1 << 16));
7516 else if ((insn & ((0x3f << 26) | (31 << 16)))
7517 == ((31 << 26) | (13 << 16)))
7518 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7519 else
7520 abort ();
7521 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7522 /* add -> addi. */
7523 insn = 14 << 26;
7524 else if ((insn & (31 << 1)) == 23 << 1
7525 && ((insn & (31 << 6)) < 14 << 6
7526 || ((insn & (31 << 6)) >= 16 << 6
7527 && (insn & (31 << 6)) < 24 << 6)))
7528 /* load and store indexed -> dform. */
7529 insn = (32 | ((insn >> 6) & 31)) << 26;
7530 else if ((insn & (31 << 1)) == 21 << 1
7531 && (insn & (0x1a << 6)) == 0)
7532 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7533 insn = (((58 | ((insn >> 6) & 4)) << 26)
7534 | ((insn >> 6) & 1));
7535 else if ((insn & (31 << 1)) == 21 << 1
7536 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7537 /* lwax -> lwa. */
7538 insn = (58 << 26) | 2;
7539 else
7540 abort ();
7541 insn |= rtra;
7542 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7543 /* Was PPC64_TLS which sits on insn boundary, now
7544 PPC64_TPREL16_LO which is at insn+2. */
7545 rel->r_offset += 2;
7546 r_type = R_PPC64_TPREL16_LO;
7547 if (toc_symndx != 0)
7548 {
7549 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7550 /* We changed the symbol. Start over in order to
7551 get h, sym, sec etc. right. */
7552 rel--;
7553 continue;
7554 }
7555 else
7556 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7557 }
7558 break;
7559
7560 case R_PPC64_GOT_TLSGD16_HI:
7561 case R_PPC64_GOT_TLSGD16_HA:
7562 tls_gd = TLS_TPRELGD;
7563 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7564 goto tls_gdld_hi;
7565 break;
7566
7567 case R_PPC64_GOT_TLSLD16_HI:
7568 case R_PPC64_GOT_TLSLD16_HA:
7569 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7570 {
7571 tls_gdld_hi:
7572 if ((tls_mask & tls_gd) != 0)
7573 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7574 + R_PPC64_GOT_TPREL16_DS);
7575 else
7576 {
7577 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7578 rel->r_offset -= 2;
7579 r_type = R_PPC64_NONE;
7580 }
7581 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7582 }
7583 break;
7584
7585 case R_PPC64_GOT_TLSGD16:
7586 case R_PPC64_GOT_TLSGD16_LO:
7587 tls_gd = TLS_TPRELGD;
7588 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7589 goto tls_get_addr_check;
7590 break;
7591
7592 case R_PPC64_GOT_TLSLD16:
7593 case R_PPC64_GOT_TLSLD16_LO:
7594 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7595 {
7596 tls_get_addr_check:
7597 if (rel + 1 < relend)
7598 {
7599 enum elf_ppc64_reloc_type r_type2;
7600 unsigned long r_symndx2;
7601 struct elf_link_hash_entry *h2;
7602 bfd_vma insn1, insn2, insn3;
7603 bfd_vma offset;
7604
7605 /* The next instruction should be a call to
7606 __tls_get_addr. Peek at the reloc to be sure. */
7607 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7608 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7609 if (r_symndx2 < symtab_hdr->sh_info
7610 || (r_type2 != R_PPC64_REL14
7611 && r_type2 != R_PPC64_REL14_BRTAKEN
7612 && r_type2 != R_PPC64_REL14_BRNTAKEN
7613 && r_type2 != R_PPC64_REL24))
7614 break;
7615
7616 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7617 while (h2->root.type == bfd_link_hash_indirect
7618 || h2->root.type == bfd_link_hash_warning)
7619 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7620 if (h2 == NULL || h2 != htab->tls_get_addr)
7621 break;
7622
7623 /* OK, it checks out. Replace the call. */
7624 offset = rel[1].r_offset;
7625 insn1 = bfd_get_32 (output_bfd,
7626 contents + rel->r_offset - 2);
7627 insn3 = bfd_get_32 (output_bfd,
7628 contents + offset + 4);
7629 if ((tls_mask & tls_gd) != 0)
7630 {
7631 /* IE */
7632 insn1 &= (1 << 26) - (1 << 2);
7633 insn1 |= 58 << 26; /* ld */
7634 insn2 = 0x7c636a14; /* add 3,3,13 */
7635 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7636 if ((tls_mask & TLS_EXPLICIT) == 0)
7637 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7638 + R_PPC64_GOT_TPREL16_DS);
7639 else
7640 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7641 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7642 }
7643 else
7644 {
7645 /* LE */
7646 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7647 insn2 = 0x38630000; /* addi 3,3,0 */
7648 if (tls_gd == 0)
7649 {
7650 /* Was an LD reloc. */
7651 r_symndx = 0;
7652 rel->r_addend = htab->tls_sec->vma + DTP_OFFSET;
7653 rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET;
7654 }
7655 else if (toc_symndx != 0)
7656 r_symndx = toc_symndx;
7657 r_type = R_PPC64_TPREL16_HA;
7658 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7659 rel[1].r_info = ELF64_R_INFO (r_symndx,
7660 R_PPC64_TPREL16_LO);
7661 rel[1].r_offset += 2;
7662 }
7663 if (insn3 == NOP
7664 || insn3 == CROR_151515 || insn3 == CROR_313131)
7665 {
7666 insn3 = insn2;
7667 insn2 = NOP;
7668 rel[1].r_offset += 4;
7669 }
7670 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7671 bfd_put_32 (output_bfd, insn2, contents + offset);
7672 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7673 if (tls_gd == 0 || toc_symndx != 0)
7674 {
7675 /* We changed the symbol. Start over in order
7676 to get h, sym, sec etc. right. */
7677 rel--;
7678 continue;
7679 }
7680 }
7681 }
7682 break;
7683
7684 case R_PPC64_DTPMOD64:
7685 if (rel + 1 < relend
7686 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7687 && rel[1].r_offset == rel->r_offset + 8)
7688 {
7689 if ((tls_mask & TLS_GD) == 0)
7690 {
7691 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7692 if ((tls_mask & TLS_TPRELGD) != 0)
7693 r_type = R_PPC64_TPREL64;
7694 else
7695 {
7696 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7697 r_type = R_PPC64_NONE;
7698 }
7699 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7700 }
7701 }
7702 else
7703 {
7704 if ((tls_mask & TLS_LD) == 0)
7705 {
7706 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7707 r_type = R_PPC64_NONE;
7708 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7709 }
7710 }
7711 break;
7712
7713 case R_PPC64_TPREL64:
7714 if ((tls_mask & TLS_TPREL) == 0)
7715 {
7716 r_type = R_PPC64_NONE;
7717 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7718 }
7719 break;
7720 }
7721
7722 /* Handle other relocations that tweak non-addend part of insn. */
7723 insn = 0;
7724 switch (r_type)
7725 {
7726 default:
7727 break;
7728
7729 /* Branch taken prediction relocations. */
7730 case R_PPC64_ADDR14_BRTAKEN:
7731 case R_PPC64_REL14_BRTAKEN:
7732 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7733 /* Fall thru. */
7734
7735 /* Branch not taken prediction relocations. */
7736 case R_PPC64_ADDR14_BRNTAKEN:
7737 case R_PPC64_REL14_BRNTAKEN:
7738 insn |= bfd_get_32 (output_bfd,
7739 contents + rel->r_offset) & ~(0x01 << 21);
7740 if (is_power4)
7741 {
7742 /* Set 'a' bit. This is 0b00010 in BO field for branch
7743 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7744 for branch on CTR insns (BO == 1a00t or 1a01t). */
7745 if ((insn & (0x14 << 21)) == (0x04 << 21))
7746 insn |= 0x02 << 21;
7747 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7748 insn |= 0x08 << 21;
7749 else
7750 break;
7751 }
7752 else
7753 {
7754 from = (rel->r_offset
7755 + input_section->output_offset
7756 + input_section->output_section->vma);
7757
7758 /* Invert 'y' bit if not the default. */
7759 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7760 insn ^= 0x01 << 21;
7761 }
7762
7763 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7764 break;
7765
7766 case R_PPC64_REL24:
7767 /* Calls to functions with a different TOC, such as calls to
7768 shared objects, need to alter the TOC pointer. This is
7769 done using a linkage stub. A REL24 branching to these
7770 linkage stubs needs to be followed by a nop, as the nop
7771 will be replaced with an instruction to restore the TOC
7772 base pointer. */
7773 if (((h != NULL
7774 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7775 && fdh->plt.plist != NULL)
7776 || ((fdh = h, sec) != NULL
7777 && sec->output_section != NULL
7778 && (htab->stub_group[sec->id].toc_off
7779 != htab->stub_group[input_section->id].toc_off)))
7780 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7781 rel, htab)) != NULL
7782 && (stub_entry->stub_type == ppc_stub_plt_call
7783 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7784 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7785 {
7786 bfd_boolean can_plt_call = 0;
7787
7788 if (rel->r_offset + 8 <= input_section->_cooked_size)
7789 {
7790 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7791 if (insn == NOP
7792 || insn == CROR_151515 || insn == CROR_313131)
7793 {
7794 bfd_put_32 (input_bfd, LD_R2_40R1,
7795 contents + rel->r_offset + 4);
7796 can_plt_call = 1;
7797 }
7798 }
7799
7800 if (!can_plt_call)
7801 {
7802 if (stub_entry->stub_type == ppc_stub_plt_call)
7803 {
7804 /* If this is a plain branch rather than a branch
7805 and link, don't require a nop. */
7806 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7807 if ((insn & 1) == 0)
7808 can_plt_call = 1;
7809 }
7810 else if (h != NULL
7811 && strcmp (h->root.root.string,
7812 ".__libc_start_main") == 0)
7813 {
7814 /* Allow crt1 branch to go via a toc adjusting stub. */
7815 can_plt_call = 1;
7816 }
7817 else
7818 {
7819 if (strcmp (input_section->output_section->name,
7820 ".init") == 0
7821 || strcmp (input_section->output_section->name,
7822 ".fini") == 0)
7823 (*_bfd_error_handler)
7824 (_("%s(%s+0x%lx): automatic multiple TOCs "
7825 "not supported using your crt files; "
7826 "recompile with -mminimal-toc or upgrade gcc"),
7827 bfd_archive_filename (input_bfd),
7828 input_section->name,
7829 (long) rel->r_offset);
7830 else
7831 (*_bfd_error_handler)
7832 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7833 "does not allow automatic multiple TOCs; "
7834 "recompile with -mminimal-toc or "
7835 "-fno-optimize-sibling-calls, "
7836 "or make `%s' extern"),
7837 bfd_archive_filename (input_bfd),
7838 input_section->name,
7839 (long) rel->r_offset,
7840 sym_name,
7841 sym_name);
7842 bfd_set_error (bfd_error_bad_value);
7843 ret = FALSE;
7844 }
7845 }
7846
7847 if (can_plt_call)
7848 {
7849 relocation = (stub_entry->stub_offset
7850 + stub_entry->stub_sec->output_offset
7851 + stub_entry->stub_sec->output_section->vma);
7852 if (stub_entry->stub_type == ppc_stub_plt_call)
7853 unresolved_reloc = FALSE;
7854 }
7855 }
7856
7857 if (h != NULL
7858 && h->root.type == bfd_link_hash_undefweak
7859 && relocation == 0
7860 && rel->r_addend == 0)
7861 {
7862 /* Tweak calls to undefined weak functions to point at a
7863 blr. We can thus call a weak function without first
7864 checking whether the function is defined. We have a
7865 blr at the end of .sfpr. */
7866 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7867 relocation = (htab->sfpr->_raw_size - 4
7868 + htab->sfpr->output_offset
7869 + htab->sfpr->output_section->vma);
7870 from = (rel->r_offset
7871 + input_section->output_offset
7872 + input_section->output_section->vma);
7873
7874 /* But let's not be silly about it. If the blr isn't in
7875 reach, just go to the next instruction. */
7876 if (relocation - from + (1 << 25) >= (1 << 26)
7877 || htab->sfpr->_raw_size == 0)
7878 relocation = from + 4;
7879 }
7880 break;
7881 }
7882
7883 /* Set `addend'. */
7884 tls_type = 0;
7885 addend = rel->r_addend;
7886 switch (r_type)
7887 {
7888 default:
7889 (*_bfd_error_handler)
7890 (_("%s: unknown relocation type %d for symbol %s"),
7891 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
7892
7893 bfd_set_error (bfd_error_bad_value);
7894 ret = FALSE;
7895 continue;
7896
7897 case R_PPC64_NONE:
7898 case R_PPC64_TLS:
7899 case R_PPC64_GNU_VTINHERIT:
7900 case R_PPC64_GNU_VTENTRY:
7901 continue;
7902
7903 /* GOT16 relocations. Like an ADDR16 using the symbol's
7904 address in the GOT as relocation value instead of the
7905 symbol's value itself. Also, create a GOT entry for the
7906 symbol and put the symbol value there. */
7907 case R_PPC64_GOT_TLSGD16:
7908 case R_PPC64_GOT_TLSGD16_LO:
7909 case R_PPC64_GOT_TLSGD16_HI:
7910 case R_PPC64_GOT_TLSGD16_HA:
7911 tls_type = TLS_TLS | TLS_GD;
7912 goto dogot;
7913
7914 case R_PPC64_GOT_TLSLD16:
7915 case R_PPC64_GOT_TLSLD16_LO:
7916 case R_PPC64_GOT_TLSLD16_HI:
7917 case R_PPC64_GOT_TLSLD16_HA:
7918 tls_type = TLS_TLS | TLS_LD;
7919 goto dogot;
7920
7921 case R_PPC64_GOT_TPREL16_DS:
7922 case R_PPC64_GOT_TPREL16_LO_DS:
7923 case R_PPC64_GOT_TPREL16_HI:
7924 case R_PPC64_GOT_TPREL16_HA:
7925 tls_type = TLS_TLS | TLS_TPREL;
7926 goto dogot;
7927
7928 case R_PPC64_GOT_DTPREL16_DS:
7929 case R_PPC64_GOT_DTPREL16_LO_DS:
7930 case R_PPC64_GOT_DTPREL16_HI:
7931 case R_PPC64_GOT_DTPREL16_HA:
7932 tls_type = TLS_TLS | TLS_DTPREL;
7933 goto dogot;
7934
7935 case R_PPC64_GOT16:
7936 case R_PPC64_GOT16_LO:
7937 case R_PPC64_GOT16_HI:
7938 case R_PPC64_GOT16_HA:
7939 case R_PPC64_GOT16_DS:
7940 case R_PPC64_GOT16_LO_DS:
7941 dogot:
7942 {
7943 /* Relocation is to the entry for this symbol in the global
7944 offset table. */
7945 asection *got;
7946 bfd_vma *offp;
7947 bfd_vma off;
7948 unsigned long indx = 0;
7949
7950 if (tls_type == (TLS_TLS | TLS_LD)
7951 && (h == NULL
7952 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
7953 offp = &ppc64_tlsld_got (input_bfd)->offset;
7954 else
7955 {
7956 struct got_entry *ent;
7957
7958 if (h != NULL)
7959 {
7960 bfd_boolean dyn = htab->elf.dynamic_sections_created;
7961 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7962 || (info->shared
7963 && SYMBOL_REFERENCES_LOCAL (info, h)))
7964 /* This is actually a static link, or it is a
7965 -Bsymbolic link and the symbol is defined
7966 locally, or the symbol was forced to be local
7967 because of a version file. */
7968 ;
7969 else
7970 {
7971 indx = h->dynindx;
7972 unresolved_reloc = FALSE;
7973 }
7974 ent = h->got.glist;
7975 }
7976 else
7977 {
7978 if (local_got_ents == NULL)
7979 abort ();
7980 ent = local_got_ents[r_symndx];
7981 }
7982
7983 for (; ent != NULL; ent = ent->next)
7984 if (ent->addend == rel->r_addend
7985 && ent->owner == input_bfd
7986 && ent->tls_type == tls_type)
7987 break;
7988 if (ent == NULL)
7989 abort ();
7990 offp = &ent->got.offset;
7991 }
7992
7993 got = ppc64_elf_tdata (input_bfd)->got;
7994 if (got == NULL)
7995 abort ();
7996
7997 /* The offset must always be a multiple of 8. We use the
7998 least significant bit to record whether we have already
7999 processed this entry. */
8000 off = *offp;
8001 if ((off & 1) != 0)
8002 off &= ~1;
8003 else
8004 {
8005 /* Generate relocs for the dynamic linker, except in
8006 the case of TLSLD where we'll use one entry per
8007 module. */
8008 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
8009
8010 *offp = off | 1;
8011 if ((info->shared || indx != 0)
8012 && (h == NULL
8013 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8014 || h->root.type != bfd_link_hash_undefweak))
8015 {
8016 outrel.r_offset = (got->output_section->vma
8017 + got->output_offset
8018 + off);
8019 outrel.r_addend = rel->r_addend;
8020 if (tls_type & (TLS_LD | TLS_GD))
8021 {
8022 outrel.r_addend = 0;
8023 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8024 if (tls_type == (TLS_TLS | TLS_GD))
8025 {
8026 loc = relgot->contents;
8027 loc += (relgot->reloc_count++
8028 * sizeof (Elf64_External_Rela));
8029 bfd_elf64_swap_reloca_out (output_bfd,
8030 &outrel, loc);
8031 outrel.r_offset += 8;
8032 outrel.r_addend = rel->r_addend;
8033 outrel.r_info
8034 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8035 }
8036 }
8037 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8038 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8039 else if (tls_type == (TLS_TLS | TLS_TPREL))
8040 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8041 else if (indx == 0)
8042 {
8043 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8044
8045 /* Write the .got section contents for the sake
8046 of prelink. */
8047 loc = got->contents + off;
8048 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8049 loc);
8050 }
8051 else
8052 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8053
8054 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8055 {
8056 outrel.r_addend += relocation;
8057 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8058 outrel.r_addend -= htab->tls_sec->vma;
8059 }
8060 loc = relgot->contents;
8061 loc += (relgot->reloc_count++
8062 * sizeof (Elf64_External_Rela));
8063 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8064 }
8065
8066 /* Init the .got section contents here if we're not
8067 emitting a reloc. */
8068 else
8069 {
8070 relocation += rel->r_addend;
8071 if (tls_type == (TLS_TLS | TLS_LD))
8072 relocation = 1;
8073 else if (tls_type != 0)
8074 {
8075 relocation -= htab->tls_sec->vma + DTP_OFFSET;
8076 if (tls_type == (TLS_TLS | TLS_TPREL))
8077 relocation += DTP_OFFSET - TP_OFFSET;
8078
8079 if (tls_type == (TLS_TLS | TLS_GD))
8080 {
8081 bfd_put_64 (output_bfd, relocation,
8082 got->contents + off + 8);
8083 relocation = 1;
8084 }
8085 }
8086
8087 bfd_put_64 (output_bfd, relocation,
8088 got->contents + off);
8089 }
8090 }
8091
8092 if (off >= (bfd_vma) -2)
8093 abort ();
8094
8095 relocation = got->output_offset + off;
8096
8097 /* TOC base (r2) is TOC start plus 0x8000. */
8098 addend = -TOC_BASE_OFF;
8099 }
8100 break;
8101
8102 case R_PPC64_PLT16_HA:
8103 case R_PPC64_PLT16_HI:
8104 case R_PPC64_PLT16_LO:
8105 case R_PPC64_PLT32:
8106 case R_PPC64_PLT64:
8107 /* Relocation is to the entry for this symbol in the
8108 procedure linkage table. */
8109
8110 /* Resolve a PLT reloc against a local symbol directly,
8111 without using the procedure linkage table. */
8112 if (h == NULL)
8113 break;
8114
8115 /* It's possible that we didn't make a PLT entry for this
8116 symbol. This happens when statically linking PIC code,
8117 or when using -Bsymbolic. Go find a match if there is a
8118 PLT entry. */
8119 if (htab->plt != NULL)
8120 {
8121 struct plt_entry *ent;
8122 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8123 if (ent->addend == rel->r_addend
8124 && ent->plt.offset != (bfd_vma) -1)
8125 {
8126 relocation = (htab->plt->output_section->vma
8127 + htab->plt->output_offset
8128 + ent->plt.offset);
8129 unresolved_reloc = FALSE;
8130 }
8131 }
8132 break;
8133
8134 case R_PPC64_TOC:
8135 /* Relocation value is TOC base. */
8136 relocation = TOCstart;
8137 if (r_symndx == 0)
8138 relocation += htab->stub_group[input_section->id].toc_off;
8139 else if (sec != NULL && !unresolved_reloc)
8140 relocation += htab->stub_group[sec->id].toc_off;
8141 else
8142 unresolved_reloc = TRUE;
8143 goto dodyn2;
8144
8145 /* TOC16 relocs. We want the offset relative to the TOC base,
8146 which is the address of the start of the TOC plus 0x8000.
8147 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8148 in this order. */
8149 case R_PPC64_TOC16:
8150 case R_PPC64_TOC16_LO:
8151 case R_PPC64_TOC16_HI:
8152 case R_PPC64_TOC16_DS:
8153 case R_PPC64_TOC16_LO_DS:
8154 case R_PPC64_TOC16_HA:
8155 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8156 break;
8157
8158 /* Relocate against the beginning of the section. */
8159 case R_PPC64_SECTOFF:
8160 case R_PPC64_SECTOFF_LO:
8161 case R_PPC64_SECTOFF_HI:
8162 case R_PPC64_SECTOFF_DS:
8163 case R_PPC64_SECTOFF_LO_DS:
8164 case R_PPC64_SECTOFF_HA:
8165 if (sec != NULL)
8166 addend -= sec->output_section->vma;
8167 break;
8168
8169 case R_PPC64_REL14:
8170 case R_PPC64_REL14_BRNTAKEN:
8171 case R_PPC64_REL14_BRTAKEN:
8172 case R_PPC64_REL24:
8173 break;
8174
8175 case R_PPC64_TPREL16:
8176 case R_PPC64_TPREL16_LO:
8177 case R_PPC64_TPREL16_HI:
8178 case R_PPC64_TPREL16_HA:
8179 case R_PPC64_TPREL16_DS:
8180 case R_PPC64_TPREL16_LO_DS:
8181 case R_PPC64_TPREL16_HIGHER:
8182 case R_PPC64_TPREL16_HIGHERA:
8183 case R_PPC64_TPREL16_HIGHEST:
8184 case R_PPC64_TPREL16_HIGHESTA:
8185 addend -= htab->tls_sec->vma + TP_OFFSET;
8186 if (info->shared)
8187 /* The TPREL16 relocs shouldn't really be used in shared
8188 libs as they will result in DT_TEXTREL being set, but
8189 support them anyway. */
8190 goto dodyn;
8191 break;
8192
8193 case R_PPC64_DTPREL16:
8194 case R_PPC64_DTPREL16_LO:
8195 case R_PPC64_DTPREL16_HI:
8196 case R_PPC64_DTPREL16_HA:
8197 case R_PPC64_DTPREL16_DS:
8198 case R_PPC64_DTPREL16_LO_DS:
8199 case R_PPC64_DTPREL16_HIGHER:
8200 case R_PPC64_DTPREL16_HIGHERA:
8201 case R_PPC64_DTPREL16_HIGHEST:
8202 case R_PPC64_DTPREL16_HIGHESTA:
8203 addend -= htab->tls_sec->vma + DTP_OFFSET;
8204 break;
8205
8206 case R_PPC64_DTPMOD64:
8207 relocation = 1;
8208 addend = 0;
8209 goto dodyn;
8210
8211 case R_PPC64_TPREL64:
8212 addend -= htab->tls_sec->vma + TP_OFFSET;
8213 goto dodyn;
8214
8215 case R_PPC64_DTPREL64:
8216 addend -= htab->tls_sec->vma + DTP_OFFSET;
8217 /* Fall thru */
8218
8219 /* Relocations that may need to be propagated if this is a
8220 dynamic object. */
8221 case R_PPC64_REL30:
8222 case R_PPC64_REL32:
8223 case R_PPC64_REL64:
8224 case R_PPC64_ADDR14:
8225 case R_PPC64_ADDR14_BRNTAKEN:
8226 case R_PPC64_ADDR14_BRTAKEN:
8227 case R_PPC64_ADDR16:
8228 case R_PPC64_ADDR16_DS:
8229 case R_PPC64_ADDR16_HA:
8230 case R_PPC64_ADDR16_HI:
8231 case R_PPC64_ADDR16_HIGHER:
8232 case R_PPC64_ADDR16_HIGHERA:
8233 case R_PPC64_ADDR16_HIGHEST:
8234 case R_PPC64_ADDR16_HIGHESTA:
8235 case R_PPC64_ADDR16_LO:
8236 case R_PPC64_ADDR16_LO_DS:
8237 case R_PPC64_ADDR24:
8238 case R_PPC64_ADDR32:
8239 case R_PPC64_ADDR64:
8240 case R_PPC64_UADDR16:
8241 case R_PPC64_UADDR32:
8242 case R_PPC64_UADDR64:
8243 /* r_symndx will be zero only for relocs against symbols
8244 from removed linkonce sections, or sections discarded by
8245 a linker script. */
8246 dodyn:
8247 if (r_symndx == 0)
8248 break;
8249 /* Fall thru. */
8250
8251 dodyn2:
8252 if ((input_section->flags & SEC_ALLOC) == 0)
8253 break;
8254
8255 if (NO_OPD_RELOCS && is_opd)
8256 break;
8257
8258 if ((info->shared
8259 && (h == NULL
8260 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8261 || h->root.type != bfd_link_hash_undefweak)
8262 && (MUST_BE_DYN_RELOC (r_type)
8263 || !SYMBOL_CALLS_LOCAL (info, h)))
8264 || (ELIMINATE_COPY_RELOCS
8265 && !info->shared
8266 && h != NULL
8267 && h->dynindx != -1
8268 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8269 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8270 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8271 {
8272 Elf_Internal_Rela outrel;
8273 bfd_boolean skip, relocate;
8274 asection *sreloc;
8275 bfd_byte *loc;
8276 bfd_vma out_off;
8277
8278 /* When generating a dynamic object, these relocations
8279 are copied into the output file to be resolved at run
8280 time. */
8281
8282 skip = FALSE;
8283 relocate = FALSE;
8284
8285 out_off = _bfd_elf_section_offset (output_bfd, info,
8286 input_section, rel->r_offset);
8287 if (out_off == (bfd_vma) -1)
8288 skip = TRUE;
8289 else if (out_off == (bfd_vma) -2)
8290 skip = TRUE, relocate = TRUE;
8291 out_off += (input_section->output_section->vma
8292 + input_section->output_offset);
8293 outrel.r_offset = out_off;
8294 outrel.r_addend = rel->r_addend;
8295
8296 /* Optimize unaligned reloc use. */
8297 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8298 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8299 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8300 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8301 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8302 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8303 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8304 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8305 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8306
8307 if (skip)
8308 memset (&outrel, 0, sizeof outrel);
8309 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8310 && !is_opd
8311 && r_type != R_PPC64_TOC)
8312 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8313 else
8314 {
8315 /* This symbol is local, or marked to become local,
8316 or this is an opd section reloc which must point
8317 at a local function. */
8318 outrel.r_addend += relocation;
8319 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8320 {
8321 if (is_opd && h != NULL)
8322 {
8323 /* Lie about opd entries. This case occurs
8324 when building shared libraries and we
8325 reference a function in another shared
8326 lib. The same thing happens for a weak
8327 definition in an application that's
8328 overridden by a strong definition in a
8329 shared lib. (I believe this is a generic
8330 bug in binutils handling of weak syms.)
8331 In these cases we won't use the opd
8332 entry in this lib. */
8333 unresolved_reloc = FALSE;
8334 }
8335 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8336
8337 /* We need to relocate .opd contents for ld.so.
8338 Prelink also wants simple and consistent rules
8339 for relocs. This make all RELATIVE relocs have
8340 *r_offset equal to r_addend. */
8341 relocate = TRUE;
8342 }
8343 else
8344 {
8345 long indx = 0;
8346
8347 if (bfd_is_abs_section (sec))
8348 ;
8349 else if (sec == NULL || sec->owner == NULL)
8350 {
8351 bfd_set_error (bfd_error_bad_value);
8352 return FALSE;
8353 }
8354 else
8355 {
8356 asection *osec;
8357
8358 osec = sec->output_section;
8359 indx = elf_section_data (osec)->dynindx;
8360
8361 /* We are turning this relocation into one
8362 against a section symbol, so subtract out
8363 the output section's address but not the
8364 offset of the input section in the output
8365 section. */
8366 outrel.r_addend -= osec->vma;
8367 }
8368
8369 outrel.r_info = ELF64_R_INFO (indx, r_type);
8370 }
8371 }
8372
8373 sreloc = elf_section_data (input_section)->sreloc;
8374 if (sreloc == NULL)
8375 abort ();
8376
8377 loc = sreloc->contents;
8378 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8379 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8380
8381 /* If this reloc is against an external symbol, it will
8382 be computed at runtime, so there's no need to do
8383 anything now. However, for the sake of prelink ensure
8384 that the section contents are a known value. */
8385 if (! relocate)
8386 {
8387 unresolved_reloc = FALSE;
8388 /* The value chosen here is quite arbitrary as ld.so
8389 ignores section contents except for the special
8390 case of .opd where the contents might be accessed
8391 before relocation. Choose zero, as that won't
8392 cause reloc overflow. */
8393 relocation = 0;
8394 addend = 0;
8395 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8396 to improve backward compatibility with older
8397 versions of ld. */
8398 if (r_type == R_PPC64_ADDR64)
8399 addend = outrel.r_addend;
8400 /* Adjust pc_relative relocs to have zero in *r_offset. */
8401 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8402 addend = (input_section->output_section->vma
8403 + input_section->output_offset
8404 + rel->r_offset);
8405 }
8406 }
8407 break;
8408
8409 case R_PPC64_COPY:
8410 case R_PPC64_GLOB_DAT:
8411 case R_PPC64_JMP_SLOT:
8412 case R_PPC64_RELATIVE:
8413 /* We shouldn't ever see these dynamic relocs in relocatable
8414 files. */
8415 /* Fall through. */
8416
8417 case R_PPC64_PLTGOT16:
8418 case R_PPC64_PLTGOT16_DS:
8419 case R_PPC64_PLTGOT16_HA:
8420 case R_PPC64_PLTGOT16_HI:
8421 case R_PPC64_PLTGOT16_LO:
8422 case R_PPC64_PLTGOT16_LO_DS:
8423 case R_PPC64_PLTREL32:
8424 case R_PPC64_PLTREL64:
8425 /* These ones haven't been implemented yet. */
8426
8427 (*_bfd_error_handler)
8428 (_("%s: relocation %s is not supported for symbol %s."),
8429 bfd_archive_filename (input_bfd),
8430 ppc64_elf_howto_table[r_type]->name, sym_name);
8431
8432 bfd_set_error (bfd_error_invalid_operation);
8433 ret = FALSE;
8434 continue;
8435 }
8436
8437 /* Do any further special processing. */
8438 switch (r_type)
8439 {
8440 default:
8441 break;
8442
8443 case R_PPC64_ADDR16_HA:
8444 case R_PPC64_ADDR16_HIGHERA:
8445 case R_PPC64_ADDR16_HIGHESTA:
8446 case R_PPC64_GOT16_HA:
8447 case R_PPC64_PLTGOT16_HA:
8448 case R_PPC64_PLT16_HA:
8449 case R_PPC64_TOC16_HA:
8450 case R_PPC64_SECTOFF_HA:
8451 case R_PPC64_TPREL16_HA:
8452 case R_PPC64_DTPREL16_HA:
8453 case R_PPC64_GOT_TLSGD16_HA:
8454 case R_PPC64_GOT_TLSLD16_HA:
8455 case R_PPC64_GOT_TPREL16_HA:
8456 case R_PPC64_GOT_DTPREL16_HA:
8457 case R_PPC64_TPREL16_HIGHER:
8458 case R_PPC64_TPREL16_HIGHERA:
8459 case R_PPC64_TPREL16_HIGHEST:
8460 case R_PPC64_TPREL16_HIGHESTA:
8461 case R_PPC64_DTPREL16_HIGHER:
8462 case R_PPC64_DTPREL16_HIGHERA:
8463 case R_PPC64_DTPREL16_HIGHEST:
8464 case R_PPC64_DTPREL16_HIGHESTA:
8465 /* It's just possible that this symbol is a weak symbol
8466 that's not actually defined anywhere. In that case,
8467 'sec' would be NULL, and we should leave the symbol
8468 alone (it will be set to zero elsewhere in the link). */
8469 if (sec != NULL)
8470 /* Add 0x10000 if sign bit in 0:15 is set.
8471 Bits 0:15 are not used. */
8472 addend += 0x8000;
8473 break;
8474
8475 case R_PPC64_ADDR16_DS:
8476 case R_PPC64_ADDR16_LO_DS:
8477 case R_PPC64_GOT16_DS:
8478 case R_PPC64_GOT16_LO_DS:
8479 case R_PPC64_PLT16_LO_DS:
8480 case R_PPC64_SECTOFF_DS:
8481 case R_PPC64_SECTOFF_LO_DS:
8482 case R_PPC64_TOC16_DS:
8483 case R_PPC64_TOC16_LO_DS:
8484 case R_PPC64_PLTGOT16_DS:
8485 case R_PPC64_PLTGOT16_LO_DS:
8486 case R_PPC64_GOT_TPREL16_DS:
8487 case R_PPC64_GOT_TPREL16_LO_DS:
8488 case R_PPC64_GOT_DTPREL16_DS:
8489 case R_PPC64_GOT_DTPREL16_LO_DS:
8490 case R_PPC64_TPREL16_DS:
8491 case R_PPC64_TPREL16_LO_DS:
8492 case R_PPC64_DTPREL16_DS:
8493 case R_PPC64_DTPREL16_LO_DS:
8494 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8495 mask = 3;
8496 /* If this reloc is against an lq insn, then the value must be
8497 a multiple of 16. This is somewhat of a hack, but the
8498 "correct" way to do this by defining _DQ forms of all the
8499 _DS relocs bloats all reloc switches in this file. It
8500 doesn't seem to make much sense to use any of these relocs
8501 in data, so testing the insn should be safe. */
8502 if ((insn & (0x3f << 26)) == (56u << 26))
8503 mask = 15;
8504 if (((relocation + addend) & mask) != 0)
8505 {
8506 (*_bfd_error_handler)
8507 (_("%s: error: relocation %s not a multiple of %d"),
8508 bfd_archive_filename (input_bfd),
8509 ppc64_elf_howto_table[r_type]->name,
8510 mask + 1);
8511 bfd_set_error (bfd_error_bad_value);
8512 ret = FALSE;
8513 continue;
8514 }
8515 break;
8516
8517 case R_PPC64_REL14:
8518 case R_PPC64_REL14_BRNTAKEN:
8519 case R_PPC64_REL14_BRTAKEN:
8520 max_br_offset = 1 << 15;
8521 goto branch_check;
8522
8523 case R_PPC64_REL24:
8524 max_br_offset = 1 << 25;
8525
8526 branch_check:
8527 /* If the branch is out of reach or the TOC register needs
8528 adjusting, then redirect the call to the local stub for
8529 this function. */
8530 from = (rel->r_offset
8531 + input_section->output_offset
8532 + input_section->output_section->vma);
8533 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8534 || (sec != NULL
8535 && sec->output_section != NULL
8536 && sec->id <= htab->top_id
8537 && (htab->stub_group[sec->id].toc_off
8538 != htab->stub_group[input_section->id].toc_off)))
8539 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8540 rel, htab)) != NULL)
8541 {
8542 /* Munge up the value and addend so that we call the stub
8543 rather than the procedure directly. */
8544 relocation = (stub_entry->stub_offset
8545 + stub_entry->stub_sec->output_offset
8546 + stub_entry->stub_sec->output_section->vma);
8547 addend = 0;
8548 }
8549 break;
8550 }
8551
8552 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8553 because such sections are not SEC_ALLOC and thus ld.so will
8554 not process them. */
8555 if (unresolved_reloc
8556 && !((input_section->flags & SEC_DEBUGGING) != 0
8557 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8558 {
8559 (*_bfd_error_handler)
8560 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8561 bfd_archive_filename (input_bfd),
8562 bfd_get_section_name (input_bfd, input_section),
8563 (long) rel->r_offset,
8564 ppc64_elf_howto_table[(int) r_type]->name,
8565 h->root.root.string);
8566 ret = FALSE;
8567 }
8568
8569 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8570 input_bfd,
8571 input_section,
8572 contents,
8573 rel->r_offset,
8574 relocation,
8575 addend);
8576
8577 if (r != bfd_reloc_ok)
8578 {
8579 if (sym_name == NULL)
8580 sym_name = "(null)";
8581 if (r == bfd_reloc_overflow)
8582 {
8583 if (warned)
8584 continue;
8585 if (h != NULL
8586 && h->root.type == bfd_link_hash_undefweak
8587 && ppc64_elf_howto_table[r_type]->pc_relative)
8588 {
8589 /* Assume this is a call protected by other code that
8590 detects the symbol is undefined. If this is the case,
8591 we can safely ignore the overflow. If not, the
8592 program is hosed anyway, and a little warning isn't
8593 going to help. */
8594
8595 continue;
8596 }
8597
8598 if (!((*info->callbacks->reloc_overflow)
8599 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8600 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8601 return FALSE;
8602 }
8603 else
8604 {
8605 (*_bfd_error_handler)
8606 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8607 bfd_archive_filename (input_bfd),
8608 bfd_get_section_name (input_bfd, input_section),
8609 (long) rel->r_offset,
8610 ppc64_elf_howto_table[r_type]->name,
8611 sym_name,
8612 (int) r);
8613 ret = FALSE;
8614 }
8615 }
8616 }
8617
8618 return ret;
8619 }
8620
8621 /* Finish up dynamic symbol handling. We set the contents of various
8622 dynamic sections here. */
8623
8624 static bfd_boolean
8625 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8626 struct bfd_link_info *info,
8627 struct elf_link_hash_entry *h,
8628 Elf_Internal_Sym *sym)
8629 {
8630 struct ppc_link_hash_table *htab;
8631 bfd *dynobj;
8632
8633 htab = ppc_hash_table (info);
8634 dynobj = htab->elf.dynobj;
8635
8636 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8637 {
8638 struct plt_entry *ent;
8639 Elf_Internal_Rela rela;
8640 bfd_byte *loc;
8641
8642 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8643 if (ent->plt.offset != (bfd_vma) -1)
8644 {
8645 /* This symbol has an entry in the procedure linkage
8646 table. Set it up. */
8647
8648 if (htab->plt == NULL
8649 || htab->relplt == NULL
8650 || htab->glink == NULL)
8651 abort ();
8652
8653 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8654 fill in the PLT entry. */
8655 rela.r_offset = (htab->plt->output_section->vma
8656 + htab->plt->output_offset
8657 + ent->plt.offset);
8658 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8659 rela.r_addend = ent->addend;
8660
8661 loc = htab->relplt->contents;
8662 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8663 * sizeof (Elf64_External_Rela));
8664 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8665 }
8666 }
8667
8668 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8669 {
8670 Elf_Internal_Rela rela;
8671 bfd_byte *loc;
8672
8673 /* This symbol needs a copy reloc. Set it up. */
8674
8675 if (h->dynindx == -1
8676 || (h->root.type != bfd_link_hash_defined
8677 && h->root.type != bfd_link_hash_defweak)
8678 || htab->relbss == NULL)
8679 abort ();
8680
8681 rela.r_offset = (h->root.u.def.value
8682 + h->root.u.def.section->output_section->vma
8683 + h->root.u.def.section->output_offset);
8684 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8685 rela.r_addend = 0;
8686 loc = htab->relbss->contents;
8687 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8688 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8689 }
8690
8691 /* Mark some specially defined symbols as absolute. */
8692 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8693 sym->st_shndx = SHN_ABS;
8694
8695 return TRUE;
8696 }
8697
8698 /* Used to decide how to sort relocs in an optimal manner for the
8699 dynamic linker, before writing them out. */
8700
8701 static enum elf_reloc_type_class
8702 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8703 {
8704 enum elf_ppc64_reloc_type r_type;
8705
8706 r_type = ELF64_R_TYPE (rela->r_info);
8707 switch (r_type)
8708 {
8709 case R_PPC64_RELATIVE:
8710 return reloc_class_relative;
8711 case R_PPC64_JMP_SLOT:
8712 return reloc_class_plt;
8713 case R_PPC64_COPY:
8714 return reloc_class_copy;
8715 default:
8716 return reloc_class_normal;
8717 }
8718 }
8719
8720 /* Finish up the dynamic sections. */
8721
8722 static bfd_boolean
8723 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8724 struct bfd_link_info *info)
8725 {
8726 struct ppc_link_hash_table *htab;
8727 bfd *dynobj;
8728 asection *sdyn;
8729
8730 htab = ppc_hash_table (info);
8731 dynobj = htab->elf.dynobj;
8732 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8733
8734 if (htab->elf.dynamic_sections_created)
8735 {
8736 Elf64_External_Dyn *dyncon, *dynconend;
8737
8738 if (sdyn == NULL || htab->got == NULL)
8739 abort ();
8740
8741 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8742 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8743 for (; dyncon < dynconend; dyncon++)
8744 {
8745 Elf_Internal_Dyn dyn;
8746 asection *s;
8747
8748 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8749
8750 switch (dyn.d_tag)
8751 {
8752 default:
8753 continue;
8754
8755 case DT_PPC64_GLINK:
8756 s = htab->glink;
8757 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8758 /* We stupidly defined DT_PPC64_GLINK to be the start
8759 of glink rather than the first entry point, which is
8760 what ld.so needs, and now have a bigger stub to
8761 support automatic multiple TOCs. */
8762 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8763 break;
8764
8765 case DT_PPC64_OPD:
8766 s = bfd_get_section_by_name (output_bfd, ".opd");
8767 if (s == NULL)
8768 continue;
8769 dyn.d_un.d_ptr = s->vma;
8770 break;
8771
8772 case DT_PPC64_OPDSZ:
8773 s = bfd_get_section_by_name (output_bfd, ".opd");
8774 if (s == NULL)
8775 continue;
8776 dyn.d_un.d_val = s->_raw_size;
8777 break;
8778
8779 case DT_PLTGOT:
8780 s = htab->plt;
8781 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8782 break;
8783
8784 case DT_JMPREL:
8785 s = htab->relplt;
8786 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8787 break;
8788
8789 case DT_PLTRELSZ:
8790 dyn.d_un.d_val = htab->relplt->_raw_size;
8791 break;
8792
8793 case DT_RELASZ:
8794 /* Don't count procedure linkage table relocs in the
8795 overall reloc count. */
8796 s = htab->relplt;
8797 if (s == NULL)
8798 continue;
8799 dyn.d_un.d_val -= s->_raw_size;
8800 break;
8801
8802 case DT_RELA:
8803 /* We may not be using the standard ELF linker script.
8804 If .rela.plt is the first .rela section, we adjust
8805 DT_RELA to not include it. */
8806 s = htab->relplt;
8807 if (s == NULL)
8808 continue;
8809 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8810 continue;
8811 dyn.d_un.d_ptr += s->_raw_size;
8812 break;
8813 }
8814
8815 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8816 }
8817 }
8818
8819 if (htab->got != NULL && htab->got->_raw_size != 0)
8820 {
8821 /* Fill in the first entry in the global offset table.
8822 We use it to hold the link-time TOCbase. */
8823 bfd_put_64 (output_bfd,
8824 elf_gp (output_bfd) + TOC_BASE_OFF,
8825 htab->got->contents);
8826
8827 /* Set .got entry size. */
8828 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8829 }
8830
8831 if (htab->plt != NULL && htab->plt->_raw_size != 0)
8832 {
8833 /* Set .plt entry size. */
8834 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8835 = PLT_ENTRY_SIZE;
8836 }
8837
8838 /* We need to handle writing out multiple GOT sections ourselves,
8839 since we didn't add them to DYNOBJ. */
8840 while ((dynobj = dynobj->link_next) != NULL)
8841 {
8842 asection *s;
8843 s = ppc64_elf_tdata (dynobj)->got;
8844 if (s != NULL
8845 && s->_raw_size != 0
8846 && s->output_section != bfd_abs_section_ptr
8847 && !bfd_set_section_contents (output_bfd, s->output_section,
8848 s->contents, s->output_offset,
8849 s->_raw_size))
8850 return FALSE;
8851 s = ppc64_elf_tdata (dynobj)->relgot;
8852 if (s != NULL
8853 && s->_raw_size != 0
8854 && s->output_section != bfd_abs_section_ptr
8855 && !bfd_set_section_contents (output_bfd, s->output_section,
8856 s->contents, s->output_offset,
8857 s->_raw_size))
8858 return FALSE;
8859 }
8860
8861 return TRUE;
8862 }
8863
8864 #include "elf64-target.h"
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