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* elf64-ppc.c (struct ppc_link_hash_table): Remove have_undefweak.
[binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23
24 /* The 64-bit PowerPC ELF ABI may be found at
25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc64.h"
34 #include "elf64-ppc.h"
35
36 static bfd_reloc_status_type ppc64_elf_ha_reloc
37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
38 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_toc_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc64_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52
53
54 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
55 #define TARGET_LITTLE_NAME "elf64-powerpcle"
56 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
57 #define TARGET_BIG_NAME "elf64-powerpc"
58 #define ELF_ARCH bfd_arch_powerpc
59 #define ELF_MACHINE_CODE EM_PPC64
60 #define ELF_MAXPAGESIZE 0x10000
61 #define elf_info_to_howto ppc64_elf_info_to_howto
62
63 #define elf_backend_want_got_sym 0
64 #define elf_backend_want_plt_sym 0
65 #define elf_backend_plt_alignment 3
66 #define elf_backend_plt_not_loaded 1
67 #define elf_backend_got_symbol_offset 0
68 #define elf_backend_got_header_size 8
69 #define elf_backend_can_gc_sections 1
70 #define elf_backend_can_refcount 1
71 #define elf_backend_rela_normal 1
72
73 #define bfd_elf64_mkobject ppc64_elf_mkobject
74 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
75 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
76 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
77 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
78 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
79
80 #define elf_backend_object_p ppc64_elf_object_p
81 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
82 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
83 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
84 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
85 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
86 #define elf_backend_check_relocs ppc64_elf_check_relocs
87 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
88 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
89 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
90 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
91 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
92 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
93 #define elf_backend_relocate_section ppc64_elf_relocate_section
94 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
95 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
96 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
97 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
98 #define elf_backend_special_sections ppc64_elf_special_sections
99
100 /* The name of the dynamic interpreter. This is put in the .interp
101 section. */
102 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
103
104 /* The size in bytes of an entry in the procedure linkage table. */
105 #define PLT_ENTRY_SIZE 24
106
107 /* The initial size of the plt reserved for the dynamic linker. */
108 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
109
110 /* TOC base pointers offset from start of TOC. */
111 #define TOC_BASE_OFF 0x8000
112
113 /* Offset of tp and dtp pointers from start of TLS block. */
114 #define TP_OFFSET 0x7000
115 #define DTP_OFFSET 0x8000
116
117 /* .plt call stub instructions. The normal stub is like this, but
118 sometimes the .plt entry crosses a 64k boundary and we need to
119 insert an addis to adjust r12. */
120 #define PLT_CALL_STUB_SIZE (7*4)
121 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
122 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
123 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
124 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
125 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
126 /* ld %r11,xxx+16@l(%r12) */
127 #define BCTR 0x4e800420 /* bctr */
128
129
130 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
131 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
132
133 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
134
135 /* glink call stub instructions. We enter with the index in R0, and the
136 address of glink entry in CTR. From that, we can calculate PLT0. */
137 #define GLINK_CALL_STUB_SIZE (16*4)
138 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
139 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
140 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
141 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
142 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
143 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
144 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
145 /* sub %r12,%r12,%r11 */
146 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
148 /* ld %r11,xxx@l(%r12) */
149 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
150 /* ld %r2,8(%r12) */
151 /* mtctr %r11 */
152 /* ld %r11,16(%r12) */
153 /* bctr */
154
155 /* Pad with this. */
156 #define NOP 0x60000000
157
158 /* Some other nops. */
159 #define CROR_151515 0x4def7b82
160 #define CROR_313131 0x4ffffb82
161
162 /* .glink entries for the first 32k functions are two instructions. */
163 #define LI_R0_0 0x38000000 /* li %r0,0 */
164 #define B_DOT 0x48000000 /* b . */
165
166 /* After that, we need two instructions to load the index, followed by
167 a branch. */
168 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
169 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
170
171 /* Instructions to save and restore floating point regs. */
172 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
173 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
174 #define BLR 0x4e800020 /* blr */
175
176 /* Since .opd is an array of descriptors and each entry will end up
177 with identical R_PPC64_RELATIVE relocs, there is really no need to
178 propagate .opd relocs; The dynamic linker should be taught to
179 relocate .opd without reloc entries. */
180 #ifndef NO_OPD_RELOCS
181 #define NO_OPD_RELOCS 0
182 #endif
183 \f
184 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
185
186 /* Relocation HOWTO's. */
187 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
188
189 static reloc_howto_type ppc64_elf_howto_raw[] = {
190 /* This reloc does nothing. */
191 HOWTO (R_PPC64_NONE, /* type */
192 0, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 32, /* bitsize */
195 FALSE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_dont, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_PPC64_NONE", /* name */
200 FALSE, /* partial_inplace */
201 0, /* src_mask */
202 0, /* dst_mask */
203 FALSE), /* pcrel_offset */
204
205 /* A standard 32 bit relocation. */
206 HOWTO (R_PPC64_ADDR32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_bitfield, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC64_ADDR32", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* An absolute 26 bit branch; the lower two bits must be zero.
221 FIXME: we don't check that, we just clear them. */
222 HOWTO (R_PPC64_ADDR24, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 26, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_bitfield, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_ADDR24", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0x03fffffc, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 16 bit relocation. */
237 HOWTO (R_PPC64_ADDR16, /* type */
238 0, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR16", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* A 16 bit relocation without overflow. */
252 HOWTO (R_PPC64_ADDR16_LO, /* type */
253 0, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont,/* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC64_ADDR16_LO", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* Bits 16-31 of an address. */
267 HOWTO (R_PPC64_ADDR16_HI, /* type */
268 16, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC64_ADDR16_HI", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
282 bits, treated as a signed number, is negative. */
283 HOWTO (R_PPC64_ADDR16_HA, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont, /* complain_on_overflow */
290 ppc64_elf_ha_reloc, /* special_function */
291 "R_PPC64_ADDR16_HA", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* An absolute 16 bit branch; the lower two bits must be zero.
298 FIXME: we don't check that, we just clear them. */
299 HOWTO (R_PPC64_ADDR14, /* type */
300 0, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 16, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_PPC64_ADDR14", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0x0000fffc, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* An absolute 16 bit branch, for which bit 10 should be set to
314 indicate that the branch is expected to be taken. The lower two
315 bits must be zero. */
316 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 0, /* bitpos */
322 complain_overflow_bitfield, /* complain_on_overflow */
323 ppc64_elf_brtaken_reloc, /* special_function */
324 "R_PPC64_ADDR14_BRTAKEN",/* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0x0000fffc, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* An absolute 16 bit branch, for which bit 10 should be set to
331 indicate that the branch is not expected to be taken. The lower
332 two bits must be zero. */
333 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 16, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 ppc64_elf_brtaken_reloc, /* special_function */
341 "R_PPC64_ADDR14_BRNTAKEN",/* name */
342 FALSE, /* partial_inplace */
343 0, /* src_mask */
344 0x0000fffc, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 /* A relative 26 bit branch; the lower two bits must be zero. */
348 HOWTO (R_PPC64_REL24, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 26, /* bitsize */
352 TRUE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_signed, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_PPC64_REL24", /* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0x03fffffc, /* dst_mask */
360 TRUE), /* pcrel_offset */
361
362 /* A relative 16 bit branch; the lower two bits must be zero. */
363 HOWTO (R_PPC64_REL14, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 16, /* bitsize */
367 TRUE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_signed, /* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_PPC64_REL14", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0x0000fffc, /* dst_mask */
375 TRUE), /* pcrel_offset */
376
377 /* A relative 16 bit branch. Bit 10 should be set to indicate that
378 the branch is expected to be taken. The lower two bits must be
379 zero. */
380 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 TRUE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_signed, /* complain_on_overflow */
387 ppc64_elf_brtaken_reloc, /* special_function */
388 "R_PPC64_REL14_BRTAKEN", /* name */
389 FALSE, /* partial_inplace */
390 0, /* src_mask */
391 0x0000fffc, /* dst_mask */
392 TRUE), /* pcrel_offset */
393
394 /* A relative 16 bit branch. Bit 10 should be set to indicate that
395 the branch is not expected to be taken. The lower two bits must
396 be zero. */
397 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
398 0, /* rightshift */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
400 16, /* bitsize */
401 TRUE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_signed, /* complain_on_overflow */
404 ppc64_elf_brtaken_reloc, /* special_function */
405 "R_PPC64_REL14_BRNTAKEN",/* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0x0000fffc, /* dst_mask */
409 TRUE), /* pcrel_offset */
410
411 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
412 symbol. */
413 HOWTO (R_PPC64_GOT16, /* type */
414 0, /* rightshift */
415 1, /* size (0 = byte, 1 = short, 2 = long) */
416 16, /* bitsize */
417 FALSE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_signed, /* complain_on_overflow */
420 ppc64_elf_unhandled_reloc, /* special_function */
421 "R_PPC64_GOT16", /* name */
422 FALSE, /* partial_inplace */
423 0, /* src_mask */
424 0xffff, /* dst_mask */
425 FALSE), /* pcrel_offset */
426
427 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
428 the symbol. */
429 HOWTO (R_PPC64_GOT16_LO, /* type */
430 0, /* rightshift */
431 1, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_dont, /* complain_on_overflow */
436 ppc64_elf_unhandled_reloc, /* special_function */
437 "R_PPC64_GOT16_LO", /* name */
438 FALSE, /* partial_inplace */
439 0, /* src_mask */
440 0xffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
444 the symbol. */
445 HOWTO (R_PPC64_GOT16_HI, /* type */
446 16, /* rightshift */
447 1, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_dont,/* complain_on_overflow */
452 ppc64_elf_unhandled_reloc, /* special_function */
453 "R_PPC64_GOT16_HI", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0xffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
460 the symbol. */
461 HOWTO (R_PPC64_GOT16_HA, /* type */
462 16, /* rightshift */
463 1, /* size (0 = byte, 1 = short, 2 = long) */
464 16, /* bitsize */
465 FALSE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_dont,/* complain_on_overflow */
468 ppc64_elf_unhandled_reloc, /* special_function */
469 "R_PPC64_GOT16_HA", /* name */
470 FALSE, /* partial_inplace */
471 0, /* src_mask */
472 0xffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
474
475 /* This is used only by the dynamic linker. The symbol should exist
476 both in the object being run and in some shared library. The
477 dynamic linker copies the data addressed by the symbol from the
478 shared library into the object, because the object being
479 run has to have the data at some particular address. */
480 HOWTO (R_PPC64_COPY, /* type */
481 0, /* rightshift */
482 0, /* this one is variable size */
483 0, /* bitsize */
484 FALSE, /* pc_relative */
485 0, /* bitpos */
486 complain_overflow_dont, /* complain_on_overflow */
487 ppc64_elf_unhandled_reloc, /* special_function */
488 "R_PPC64_COPY", /* name */
489 FALSE, /* partial_inplace */
490 0, /* src_mask */
491 0, /* dst_mask */
492 FALSE), /* pcrel_offset */
493
494 /* Like R_PPC64_ADDR64, but used when setting global offset table
495 entries. */
496 HOWTO (R_PPC64_GLOB_DAT, /* type */
497 0, /* rightshift */
498 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
499 64, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_dont, /* complain_on_overflow */
503 ppc64_elf_unhandled_reloc, /* special_function */
504 "R_PPC64_GLOB_DAT", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 ONES (64), /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Created by the link editor. Marks a procedure linkage table
511 entry for a symbol. */
512 HOWTO (R_PPC64_JMP_SLOT, /* type */
513 0, /* rightshift */
514 0, /* size (0 = byte, 1 = short, 2 = long) */
515 0, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 ppc64_elf_unhandled_reloc, /* special_function */
520 "R_PPC64_JMP_SLOT", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Used only by the dynamic linker. When the object is run, this
527 doubleword64 is set to the load address of the object, plus the
528 addend. */
529 HOWTO (R_PPC64_RELATIVE, /* type */
530 0, /* rightshift */
531 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
532 64, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 bfd_elf_generic_reloc, /* special_function */
537 "R_PPC64_RELATIVE", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 ONES (64), /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* Like R_PPC64_ADDR32, but may be unaligned. */
544 HOWTO (R_PPC64_UADDR32, /* type */
545 0, /* rightshift */
546 2, /* size (0 = byte, 1 = short, 2 = long) */
547 32, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_bitfield, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 "R_PPC64_UADDR32", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffffffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* Like R_PPC64_ADDR16, but may be unaligned. */
559 HOWTO (R_PPC64_UADDR16, /* type */
560 0, /* rightshift */
561 1, /* size (0 = byte, 1 = short, 2 = long) */
562 16, /* bitsize */
563 FALSE, /* pc_relative */
564 0, /* bitpos */
565 complain_overflow_bitfield, /* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 "R_PPC64_UADDR16", /* name */
568 FALSE, /* partial_inplace */
569 0, /* src_mask */
570 0xffff, /* dst_mask */
571 FALSE), /* pcrel_offset */
572
573 /* 32-bit PC relative. */
574 HOWTO (R_PPC64_REL32, /* type */
575 0, /* rightshift */
576 2, /* size (0 = byte, 1 = short, 2 = long) */
577 32, /* bitsize */
578 TRUE, /* pc_relative */
579 0, /* bitpos */
580 /* FIXME: Verify. Was complain_overflow_bitfield. */
581 complain_overflow_signed, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC64_REL32", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 TRUE), /* pcrel_offset */
588
589 /* 32-bit relocation to the symbol's procedure linkage table. */
590 HOWTO (R_PPC64_PLT32, /* type */
591 0, /* rightshift */
592 2, /* size (0 = byte, 1 = short, 2 = long) */
593 32, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_bitfield, /* complain_on_overflow */
597 ppc64_elf_unhandled_reloc, /* special_function */
598 "R_PPC64_PLT32", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffffffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
605 FIXME: R_PPC64_PLTREL32 not supported. */
606 HOWTO (R_PPC64_PLTREL32, /* type */
607 0, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 32, /* bitsize */
610 TRUE, /* pc_relative */
611 0, /* bitpos */
612 complain_overflow_signed, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC64_PLTREL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
621 the symbol. */
622 HOWTO (R_PPC64_PLT16_LO, /* type */
623 0, /* rightshift */
624 1, /* size (0 = byte, 1 = short, 2 = long) */
625 16, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_dont, /* complain_on_overflow */
629 ppc64_elf_unhandled_reloc, /* special_function */
630 "R_PPC64_PLT16_LO", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0xffff, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
637 the symbol. */
638 HOWTO (R_PPC64_PLT16_HI, /* type */
639 16, /* rightshift */
640 1, /* size (0 = byte, 1 = short, 2 = long) */
641 16, /* bitsize */
642 FALSE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_dont, /* complain_on_overflow */
645 ppc64_elf_unhandled_reloc, /* special_function */
646 "R_PPC64_PLT16_HI", /* name */
647 FALSE, /* partial_inplace */
648 0, /* src_mask */
649 0xffff, /* dst_mask */
650 FALSE), /* pcrel_offset */
651
652 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
653 the symbol. */
654 HOWTO (R_PPC64_PLT16_HA, /* type */
655 16, /* rightshift */
656 1, /* size (0 = byte, 1 = short, 2 = long) */
657 16, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_dont, /* complain_on_overflow */
661 ppc64_elf_unhandled_reloc, /* special_function */
662 "R_PPC64_PLT16_HA", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0xffff, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* 16-bit section relative relocation. */
669 HOWTO (R_PPC64_SECTOFF, /* type */
670 0, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_bitfield, /* complain_on_overflow */
676 ppc64_elf_sectoff_reloc, /* special_function */
677 "R_PPC64_SECTOFF", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Like R_PPC64_SECTOFF, but no overflow warning. */
684 HOWTO (R_PPC64_SECTOFF_LO, /* type */
685 0, /* rightshift */
686 1, /* size (0 = byte, 1 = short, 2 = long) */
687 16, /* bitsize */
688 FALSE, /* pc_relative */
689 0, /* bitpos */
690 complain_overflow_dont, /* complain_on_overflow */
691 ppc64_elf_sectoff_reloc, /* special_function */
692 "R_PPC64_SECTOFF_LO", /* name */
693 FALSE, /* partial_inplace */
694 0, /* src_mask */
695 0xffff, /* dst_mask */
696 FALSE), /* pcrel_offset */
697
698 /* 16-bit upper half section relative relocation. */
699 HOWTO (R_PPC64_SECTOFF_HI, /* type */
700 16, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_dont, /* complain_on_overflow */
706 ppc64_elf_sectoff_reloc, /* special_function */
707 "R_PPC64_SECTOFF_HI", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit upper half adjusted section relative relocation. */
714 HOWTO (R_PPC64_SECTOFF_HA, /* type */
715 16, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_dont, /* complain_on_overflow */
721 ppc64_elf_sectoff_ha_reloc, /* special_function */
722 "R_PPC64_SECTOFF_HA", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* Like R_PPC64_REL24 without touching the two least significant bits. */
729 HOWTO (R_PPC64_REL30, /* type */
730 2, /* rightshift */
731 2, /* size (0 = byte, 1 = short, 2 = long) */
732 30, /* bitsize */
733 TRUE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC64_REL30", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xfffffffc, /* dst_mask */
741 TRUE), /* pcrel_offset */
742
743 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
744
745 /* A standard 64-bit relocation. */
746 HOWTO (R_PPC64_ADDR64, /* type */
747 0, /* rightshift */
748 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
749 64, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_dont, /* complain_on_overflow */
753 bfd_elf_generic_reloc, /* special_function */
754 "R_PPC64_ADDR64", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 ONES (64), /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* The bits 32-47 of an address. */
761 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
762 32, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_dont, /* complain_on_overflow */
768 bfd_elf_generic_reloc, /* special_function */
769 "R_PPC64_ADDR16_HIGHER", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* The bits 32-47 of an address, plus 1 if the contents of the low
776 16 bits, treated as a signed number, is negative. */
777 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
778 32, /* rightshift */
779 1, /* size (0 = byte, 1 = short, 2 = long) */
780 16, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 ppc64_elf_ha_reloc, /* special_function */
785 "R_PPC64_ADDR16_HIGHERA", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0xffff, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 /* The bits 48-63 of an address. */
792 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
793 48, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHEST", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 48-63 of an address, plus 1 if the contents of the low
807 16 bits, treated as a signed number, is negative. */
808 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
809 48, /* rightshift */
810 1, /* size (0 = byte, 1 = short, 2 = long) */
811 16, /* bitsize */
812 FALSE, /* pc_relative */
813 0, /* bitpos */
814 complain_overflow_dont, /* complain_on_overflow */
815 ppc64_elf_ha_reloc, /* special_function */
816 "R_PPC64_ADDR16_HIGHESTA", /* name */
817 FALSE, /* partial_inplace */
818 0, /* src_mask */
819 0xffff, /* dst_mask */
820 FALSE), /* pcrel_offset */
821
822 /* Like ADDR64, but may be unaligned. */
823 HOWTO (R_PPC64_UADDR64, /* type */
824 0, /* rightshift */
825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
826 64, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_UADDR64", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 ONES (64), /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* 64-bit relative relocation. */
838 HOWTO (R_PPC64_REL64, /* type */
839 0, /* rightshift */
840 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
841 64, /* bitsize */
842 TRUE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_PPC64_REL64", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 ONES (64), /* dst_mask */
850 TRUE), /* pcrel_offset */
851
852 /* 64-bit relocation to the symbol's procedure linkage table. */
853 HOWTO (R_PPC64_PLT64, /* type */
854 0, /* rightshift */
855 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
856 64, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 ppc64_elf_unhandled_reloc, /* special_function */
861 "R_PPC64_PLT64", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 ONES (64), /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* 64-bit PC relative relocation to the symbol's procedure linkage
868 table. */
869 /* FIXME: R_PPC64_PLTREL64 not supported. */
870 HOWTO (R_PPC64_PLTREL64, /* type */
871 0, /* rightshift */
872 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
873 64, /* bitsize */
874 TRUE, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_dont, /* complain_on_overflow */
877 ppc64_elf_unhandled_reloc, /* special_function */
878 "R_PPC64_PLTREL64", /* name */
879 FALSE, /* partial_inplace */
880 0, /* src_mask */
881 ONES (64), /* dst_mask */
882 TRUE), /* pcrel_offset */
883
884 /* 16 bit TOC-relative relocation. */
885
886 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
887 HOWTO (R_PPC64_TOC16, /* type */
888 0, /* rightshift */
889 1, /* size (0 = byte, 1 = short, 2 = long) */
890 16, /* bitsize */
891 FALSE, /* pc_relative */
892 0, /* bitpos */
893 complain_overflow_signed, /* complain_on_overflow */
894 ppc64_elf_toc_reloc, /* special_function */
895 "R_PPC64_TOC16", /* name */
896 FALSE, /* partial_inplace */
897 0, /* src_mask */
898 0xffff, /* dst_mask */
899 FALSE), /* pcrel_offset */
900
901 /* 16 bit TOC-relative relocation without overflow. */
902
903 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
904 HOWTO (R_PPC64_TOC16_LO, /* type */
905 0, /* rightshift */
906 1, /* size (0 = byte, 1 = short, 2 = long) */
907 16, /* bitsize */
908 FALSE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont, /* complain_on_overflow */
911 ppc64_elf_toc_reloc, /* special_function */
912 "R_PPC64_TOC16_LO", /* name */
913 FALSE, /* partial_inplace */
914 0, /* src_mask */
915 0xffff, /* dst_mask */
916 FALSE), /* pcrel_offset */
917
918 /* 16 bit TOC-relative relocation, high 16 bits. */
919
920 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
921 HOWTO (R_PPC64_TOC16_HI, /* type */
922 16, /* rightshift */
923 1, /* size (0 = byte, 1 = short, 2 = long) */
924 16, /* bitsize */
925 FALSE, /* pc_relative */
926 0, /* bitpos */
927 complain_overflow_dont, /* complain_on_overflow */
928 ppc64_elf_toc_reloc, /* special_function */
929 "R_PPC64_TOC16_HI", /* name */
930 FALSE, /* partial_inplace */
931 0, /* src_mask */
932 0xffff, /* dst_mask */
933 FALSE), /* pcrel_offset */
934
935 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
936 contents of the low 16 bits, treated as a signed number, is
937 negative. */
938
939 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
940 HOWTO (R_PPC64_TOC16_HA, /* type */
941 16, /* rightshift */
942 1, /* size (0 = byte, 1 = short, 2 = long) */
943 16, /* bitsize */
944 FALSE, /* pc_relative */
945 0, /* bitpos */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc64_elf_toc_ha_reloc, /* special_function */
948 "R_PPC64_TOC16_HA", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* 64-bit relocation; insert value of TOC base (.TOC.). */
955
956 /* R_PPC64_TOC 51 doubleword64 .TOC. */
957 HOWTO (R_PPC64_TOC, /* type */
958 0, /* rightshift */
959 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
960 64, /* bitsize */
961 FALSE, /* pc_relative */
962 0, /* bitpos */
963 complain_overflow_bitfield, /* complain_on_overflow */
964 ppc64_elf_toc64_reloc, /* special_function */
965 "R_PPC64_TOC", /* name */
966 FALSE, /* partial_inplace */
967 0, /* src_mask */
968 ONES (64), /* dst_mask */
969 FALSE), /* pcrel_offset */
970
971 /* Like R_PPC64_GOT16, but also informs the link editor that the
972 value to relocate may (!) refer to a PLT entry which the link
973 editor (a) may replace with the symbol value. If the link editor
974 is unable to fully resolve the symbol, it may (b) create a PLT
975 entry and store the address to the new PLT entry in the GOT.
976 This permits lazy resolution of function symbols at run time.
977 The link editor may also skip all of this and just (c) emit a
978 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
979 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
980 HOWTO (R_PPC64_PLTGOT16, /* type */
981 0, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_signed, /* complain_on_overflow */
987 ppc64_elf_unhandled_reloc, /* special_function */
988 "R_PPC64_PLTGOT16", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Like R_PPC64_PLTGOT16, but without overflow. */
995 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
996 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
997 0, /* rightshift */
998 1, /* size (0 = byte, 1 = short, 2 = long) */
999 16, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_dont, /* complain_on_overflow */
1003 ppc64_elf_unhandled_reloc, /* special_function */
1004 "R_PPC64_PLTGOT16_LO", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 0xffff, /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1011 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1012 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1013 16, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc64_elf_unhandled_reloc, /* special_function */
1020 "R_PPC64_PLTGOT16_HI", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1027 1 if the contents of the low 16 bits, treated as a signed number,
1028 is negative. */
1029 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1030 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1031 16, /* rightshift */
1032 1, /* size (0 = byte, 1 = short, 2 = long) */
1033 16, /* bitsize */
1034 FALSE, /* pc_relative */
1035 0, /* bitpos */
1036 complain_overflow_dont,/* complain_on_overflow */
1037 ppc64_elf_unhandled_reloc, /* special_function */
1038 "R_PPC64_PLTGOT16_HA", /* name */
1039 FALSE, /* partial_inplace */
1040 0, /* src_mask */
1041 0xffff, /* dst_mask */
1042 FALSE), /* pcrel_offset */
1043
1044 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1045 HOWTO (R_PPC64_ADDR16_DS, /* type */
1046 0, /* rightshift */
1047 1, /* size (0 = byte, 1 = short, 2 = long) */
1048 16, /* bitsize */
1049 FALSE, /* pc_relative */
1050 0, /* bitpos */
1051 complain_overflow_bitfield, /* complain_on_overflow */
1052 bfd_elf_generic_reloc, /* special_function */
1053 "R_PPC64_ADDR16_DS", /* name */
1054 FALSE, /* partial_inplace */
1055 0, /* src_mask */
1056 0xfffc, /* dst_mask */
1057 FALSE), /* pcrel_offset */
1058
1059 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1060 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_dont,/* complain_on_overflow */
1067 bfd_elf_generic_reloc, /* special_function */
1068 "R_PPC64_ADDR16_LO_DS",/* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xfffc, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1075 HOWTO (R_PPC64_GOT16_DS, /* type */
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_signed, /* complain_on_overflow */
1082 ppc64_elf_unhandled_reloc, /* special_function */
1083 "R_PPC64_GOT16_DS", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xfffc, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1090 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1091 0, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 ppc64_elf_unhandled_reloc, /* special_function */
1098 "R_PPC64_GOT16_LO_DS", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xfffc, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1105 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1106 0, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc64_elf_unhandled_reloc, /* special_function */
1113 "R_PPC64_PLT16_LO_DS", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xfffc, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1120 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_bitfield, /* complain_on_overflow */
1127 ppc64_elf_sectoff_reloc, /* special_function */
1128 "R_PPC64_SECTOFF_DS", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xfffc, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1135 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_dont, /* complain_on_overflow */
1142 ppc64_elf_sectoff_reloc, /* special_function */
1143 "R_PPC64_SECTOFF_LO_DS",/* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xfffc, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1150 HOWTO (R_PPC64_TOC16_DS, /* type */
1151 0, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_signed, /* complain_on_overflow */
1157 ppc64_elf_toc_reloc, /* special_function */
1158 "R_PPC64_TOC16_DS", /* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xfffc, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1165 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1166 0, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 ppc64_elf_toc_reloc, /* special_function */
1173 "R_PPC64_TOC16_LO_DS", /* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xfffc, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1180 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1181 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1182 0, /* rightshift */
1183 1, /* size (0 = byte, 1 = short, 2 = long) */
1184 16, /* bitsize */
1185 FALSE, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_signed, /* complain_on_overflow */
1188 ppc64_elf_unhandled_reloc, /* special_function */
1189 "R_PPC64_PLTGOT16_DS", /* name */
1190 FALSE, /* partial_inplace */
1191 0, /* src_mask */
1192 0xfffc, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1194
1195 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1196 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1197 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_dont, /* complain_on_overflow */
1204 ppc64_elf_unhandled_reloc, /* special_function */
1205 "R_PPC64_PLTGOT16_LO_DS",/* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xfffc, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* Marker reloc for TLS. */
1212 HOWTO (R_PPC64_TLS,
1213 0, /* rightshift */
1214 2, /* size (0 = byte, 1 = short, 2 = long) */
1215 32, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont, /* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC64_TLS", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Computes the load module index of the load module that contains the
1227 definition of its TLS sym. */
1228 HOWTO (R_PPC64_DTPMOD64,
1229 0, /* rightshift */
1230 4, /* size (0 = byte, 1 = short, 2 = long) */
1231 64, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc64_elf_unhandled_reloc, /* special_function */
1236 "R_PPC64_DTPMOD64", /* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 ONES (64), /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Computes a dtv-relative displacement, the difference between the value
1243 of sym+add and the base address of the thread-local storage block that
1244 contains the definition of sym, minus 0x8000. */
1245 HOWTO (R_PPC64_DTPREL64,
1246 0, /* rightshift */
1247 4, /* size (0 = byte, 1 = short, 2 = long) */
1248 64, /* bitsize */
1249 FALSE, /* pc_relative */
1250 0, /* bitpos */
1251 complain_overflow_dont, /* complain_on_overflow */
1252 ppc64_elf_unhandled_reloc, /* special_function */
1253 "R_PPC64_DTPREL64", /* name */
1254 FALSE, /* partial_inplace */
1255 0, /* src_mask */
1256 ONES (64), /* dst_mask */
1257 FALSE), /* pcrel_offset */
1258
1259 /* A 16 bit dtprel reloc. */
1260 HOWTO (R_PPC64_DTPREL16,
1261 0, /* rightshift */
1262 1, /* size (0 = byte, 1 = short, 2 = long) */
1263 16, /* bitsize */
1264 FALSE, /* pc_relative */
1265 0, /* bitpos */
1266 complain_overflow_signed, /* complain_on_overflow */
1267 ppc64_elf_unhandled_reloc, /* special_function */
1268 "R_PPC64_DTPREL16", /* name */
1269 FALSE, /* partial_inplace */
1270 0, /* src_mask */
1271 0xffff, /* dst_mask */
1272 FALSE), /* pcrel_offset */
1273
1274 /* Like DTPREL16, but no overflow. */
1275 HOWTO (R_PPC64_DTPREL16_LO,
1276 0, /* rightshift */
1277 1, /* size (0 = byte, 1 = short, 2 = long) */
1278 16, /* bitsize */
1279 FALSE, /* pc_relative */
1280 0, /* bitpos */
1281 complain_overflow_dont, /* complain_on_overflow */
1282 ppc64_elf_unhandled_reloc, /* special_function */
1283 "R_PPC64_DTPREL16_LO", /* name */
1284 FALSE, /* partial_inplace */
1285 0, /* src_mask */
1286 0xffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1288
1289 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1290 HOWTO (R_PPC64_DTPREL16_HI,
1291 16, /* rightshift */
1292 1, /* size (0 = byte, 1 = short, 2 = long) */
1293 16, /* bitsize */
1294 FALSE, /* pc_relative */
1295 0, /* bitpos */
1296 complain_overflow_dont, /* complain_on_overflow */
1297 ppc64_elf_unhandled_reloc, /* special_function */
1298 "R_PPC64_DTPREL16_HI", /* name */
1299 FALSE, /* partial_inplace */
1300 0, /* src_mask */
1301 0xffff, /* dst_mask */
1302 FALSE), /* pcrel_offset */
1303
1304 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1305 HOWTO (R_PPC64_DTPREL16_HA,
1306 16, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_dont, /* complain_on_overflow */
1312 ppc64_elf_unhandled_reloc, /* special_function */
1313 "R_PPC64_DTPREL16_HA", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1320 HOWTO (R_PPC64_DTPREL16_HIGHER,
1321 32, /* rightshift */
1322 1, /* size (0 = byte, 1 = short, 2 = long) */
1323 16, /* bitsize */
1324 FALSE, /* pc_relative */
1325 0, /* bitpos */
1326 complain_overflow_dont, /* complain_on_overflow */
1327 ppc64_elf_unhandled_reloc, /* special_function */
1328 "R_PPC64_DTPREL16_HIGHER", /* name */
1329 FALSE, /* partial_inplace */
1330 0, /* src_mask */
1331 0xffff, /* dst_mask */
1332 FALSE), /* pcrel_offset */
1333
1334 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1335 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1336 32, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 FALSE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_dont, /* complain_on_overflow */
1342 ppc64_elf_unhandled_reloc, /* special_function */
1343 "R_PPC64_DTPREL16_HIGHERA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1350 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1351 48, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_dont, /* complain_on_overflow */
1357 ppc64_elf_unhandled_reloc, /* special_function */
1358 "R_PPC64_DTPREL16_HIGHEST", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1365 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1366 48, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont, /* complain_on_overflow */
1372 ppc64_elf_unhandled_reloc, /* special_function */
1373 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* Like DTPREL16, but for insns with a DS field. */
1380 HOWTO (R_PPC64_DTPREL16_DS,
1381 0, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 FALSE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_signed, /* complain_on_overflow */
1387 ppc64_elf_unhandled_reloc, /* special_function */
1388 "R_PPC64_DTPREL16_DS", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xfffc, /* dst_mask */
1392 FALSE), /* pcrel_offset */
1393
1394 /* Like DTPREL16_DS, but no overflow. */
1395 HOWTO (R_PPC64_DTPREL16_LO_DS,
1396 0, /* rightshift */
1397 1, /* size (0 = byte, 1 = short, 2 = long) */
1398 16, /* bitsize */
1399 FALSE, /* pc_relative */
1400 0, /* bitpos */
1401 complain_overflow_dont, /* complain_on_overflow */
1402 ppc64_elf_unhandled_reloc, /* special_function */
1403 "R_PPC64_DTPREL16_LO_DS", /* name */
1404 FALSE, /* partial_inplace */
1405 0, /* src_mask */
1406 0xfffc, /* dst_mask */
1407 FALSE), /* pcrel_offset */
1408
1409 /* Computes a tp-relative displacement, the difference between the value of
1410 sym+add and the value of the thread pointer (r13). */
1411 HOWTO (R_PPC64_TPREL64,
1412 0, /* rightshift */
1413 4, /* size (0 = byte, 1 = short, 2 = long) */
1414 64, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 ppc64_elf_unhandled_reloc, /* special_function */
1419 "R_PPC64_TPREL64", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 ONES (64), /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* A 16 bit tprel reloc. */
1426 HOWTO (R_PPC64_TPREL16,
1427 0, /* rightshift */
1428 1, /* size (0 = byte, 1 = short, 2 = long) */
1429 16, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_signed, /* complain_on_overflow */
1433 ppc64_elf_unhandled_reloc, /* special_function */
1434 "R_PPC64_TPREL16", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0xffff, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Like TPREL16, but no overflow. */
1441 HOWTO (R_PPC64_TPREL16_LO,
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_dont, /* complain_on_overflow */
1448 ppc64_elf_unhandled_reloc, /* special_function */
1449 "R_PPC64_TPREL16_LO", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454
1455 /* Like TPREL16_LO, but next higher group of 16 bits. */
1456 HOWTO (R_PPC64_TPREL16_HI,
1457 16, /* rightshift */
1458 1, /* size (0 = byte, 1 = short, 2 = long) */
1459 16, /* bitsize */
1460 FALSE, /* pc_relative */
1461 0, /* bitpos */
1462 complain_overflow_dont, /* complain_on_overflow */
1463 ppc64_elf_unhandled_reloc, /* special_function */
1464 "R_PPC64_TPREL16_HI", /* name */
1465 FALSE, /* partial_inplace */
1466 0, /* src_mask */
1467 0xffff, /* dst_mask */
1468 FALSE), /* pcrel_offset */
1469
1470 /* Like TPREL16_HI, but adjust for low 16 bits. */
1471 HOWTO (R_PPC64_TPREL16_HA,
1472 16, /* rightshift */
1473 1, /* size (0 = byte, 1 = short, 2 = long) */
1474 16, /* bitsize */
1475 FALSE, /* pc_relative */
1476 0, /* bitpos */
1477 complain_overflow_dont, /* complain_on_overflow */
1478 ppc64_elf_unhandled_reloc, /* special_function */
1479 "R_PPC64_TPREL16_HA", /* name */
1480 FALSE, /* partial_inplace */
1481 0, /* src_mask */
1482 0xffff, /* dst_mask */
1483 FALSE), /* pcrel_offset */
1484
1485 /* Like TPREL16_HI, but next higher group of 16 bits. */
1486 HOWTO (R_PPC64_TPREL16_HIGHER,
1487 32, /* rightshift */
1488 1, /* size (0 = byte, 1 = short, 2 = long) */
1489 16, /* bitsize */
1490 FALSE, /* pc_relative */
1491 0, /* bitpos */
1492 complain_overflow_dont, /* complain_on_overflow */
1493 ppc64_elf_unhandled_reloc, /* special_function */
1494 "R_PPC64_TPREL16_HIGHER", /* name */
1495 FALSE, /* partial_inplace */
1496 0, /* src_mask */
1497 0xffff, /* dst_mask */
1498 FALSE), /* pcrel_offset */
1499
1500 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1501 HOWTO (R_PPC64_TPREL16_HIGHERA,
1502 32, /* rightshift */
1503 1, /* size (0 = byte, 1 = short, 2 = long) */
1504 16, /* bitsize */
1505 FALSE, /* pc_relative */
1506 0, /* bitpos */
1507 complain_overflow_dont, /* complain_on_overflow */
1508 ppc64_elf_unhandled_reloc, /* special_function */
1509 "R_PPC64_TPREL16_HIGHERA", /* name */
1510 FALSE, /* partial_inplace */
1511 0, /* src_mask */
1512 0xffff, /* dst_mask */
1513 FALSE), /* pcrel_offset */
1514
1515 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1516 HOWTO (R_PPC64_TPREL16_HIGHEST,
1517 48, /* rightshift */
1518 1, /* size (0 = byte, 1 = short, 2 = long) */
1519 16, /* bitsize */
1520 FALSE, /* pc_relative */
1521 0, /* bitpos */
1522 complain_overflow_dont, /* complain_on_overflow */
1523 ppc64_elf_unhandled_reloc, /* special_function */
1524 "R_PPC64_TPREL16_HIGHEST", /* name */
1525 FALSE, /* partial_inplace */
1526 0, /* src_mask */
1527 0xffff, /* dst_mask */
1528 FALSE), /* pcrel_offset */
1529
1530 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1531 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1532 48, /* rightshift */
1533 1, /* size (0 = byte, 1 = short, 2 = long) */
1534 16, /* bitsize */
1535 FALSE, /* pc_relative */
1536 0, /* bitpos */
1537 complain_overflow_dont, /* complain_on_overflow */
1538 ppc64_elf_unhandled_reloc, /* special_function */
1539 "R_PPC64_TPREL16_HIGHESTA", /* name */
1540 FALSE, /* partial_inplace */
1541 0, /* src_mask */
1542 0xffff, /* dst_mask */
1543 FALSE), /* pcrel_offset */
1544
1545 /* Like TPREL16, but for insns with a DS field. */
1546 HOWTO (R_PPC64_TPREL16_DS,
1547 0, /* rightshift */
1548 1, /* size (0 = byte, 1 = short, 2 = long) */
1549 16, /* bitsize */
1550 FALSE, /* pc_relative */
1551 0, /* bitpos */
1552 complain_overflow_signed, /* complain_on_overflow */
1553 ppc64_elf_unhandled_reloc, /* special_function */
1554 "R_PPC64_TPREL16_DS", /* name */
1555 FALSE, /* partial_inplace */
1556 0, /* src_mask */
1557 0xfffc, /* dst_mask */
1558 FALSE), /* pcrel_offset */
1559
1560 /* Like TPREL16_DS, but no overflow. */
1561 HOWTO (R_PPC64_TPREL16_LO_DS,
1562 0, /* rightshift */
1563 1, /* size (0 = byte, 1 = short, 2 = long) */
1564 16, /* bitsize */
1565 FALSE, /* pc_relative */
1566 0, /* bitpos */
1567 complain_overflow_dont, /* complain_on_overflow */
1568 ppc64_elf_unhandled_reloc, /* special_function */
1569 "R_PPC64_TPREL16_LO_DS", /* name */
1570 FALSE, /* partial_inplace */
1571 0, /* src_mask */
1572 0xfffc, /* dst_mask */
1573 FALSE), /* pcrel_offset */
1574
1575 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1576 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1577 to the first entry relative to the TOC base (r2). */
1578 HOWTO (R_PPC64_GOT_TLSGD16,
1579 0, /* rightshift */
1580 1, /* size (0 = byte, 1 = short, 2 = long) */
1581 16, /* bitsize */
1582 FALSE, /* pc_relative */
1583 0, /* bitpos */
1584 complain_overflow_signed, /* complain_on_overflow */
1585 ppc64_elf_unhandled_reloc, /* special_function */
1586 "R_PPC64_GOT_TLSGD16", /* name */
1587 FALSE, /* partial_inplace */
1588 0, /* src_mask */
1589 0xffff, /* dst_mask */
1590 FALSE), /* pcrel_offset */
1591
1592 /* Like GOT_TLSGD16, but no overflow. */
1593 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1594 0, /* rightshift */
1595 1, /* size (0 = byte, 1 = short, 2 = long) */
1596 16, /* bitsize */
1597 FALSE, /* pc_relative */
1598 0, /* bitpos */
1599 complain_overflow_dont, /* complain_on_overflow */
1600 ppc64_elf_unhandled_reloc, /* special_function */
1601 "R_PPC64_GOT_TLSGD16_LO", /* name */
1602 FALSE, /* partial_inplace */
1603 0, /* src_mask */
1604 0xffff, /* dst_mask */
1605 FALSE), /* pcrel_offset */
1606
1607 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1608 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1609 16, /* rightshift */
1610 1, /* size (0 = byte, 1 = short, 2 = long) */
1611 16, /* bitsize */
1612 FALSE, /* pc_relative */
1613 0, /* bitpos */
1614 complain_overflow_dont, /* complain_on_overflow */
1615 ppc64_elf_unhandled_reloc, /* special_function */
1616 "R_PPC64_GOT_TLSGD16_HI", /* name */
1617 FALSE, /* partial_inplace */
1618 0, /* src_mask */
1619 0xffff, /* dst_mask */
1620 FALSE), /* pcrel_offset */
1621
1622 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1623 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1624 16, /* rightshift */
1625 1, /* size (0 = byte, 1 = short, 2 = long) */
1626 16, /* bitsize */
1627 FALSE, /* pc_relative */
1628 0, /* bitpos */
1629 complain_overflow_dont, /* complain_on_overflow */
1630 ppc64_elf_unhandled_reloc, /* special_function */
1631 "R_PPC64_GOT_TLSGD16_HA", /* name */
1632 FALSE, /* partial_inplace */
1633 0, /* src_mask */
1634 0xffff, /* dst_mask */
1635 FALSE), /* pcrel_offset */
1636
1637 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1638 with values (sym+add)@dtpmod and zero, and computes the offset to the
1639 first entry relative to the TOC base (r2). */
1640 HOWTO (R_PPC64_GOT_TLSLD16,
1641 0, /* rightshift */
1642 1, /* size (0 = byte, 1 = short, 2 = long) */
1643 16, /* bitsize */
1644 FALSE, /* pc_relative */
1645 0, /* bitpos */
1646 complain_overflow_signed, /* complain_on_overflow */
1647 ppc64_elf_unhandled_reloc, /* special_function */
1648 "R_PPC64_GOT_TLSLD16", /* name */
1649 FALSE, /* partial_inplace */
1650 0, /* src_mask */
1651 0xffff, /* dst_mask */
1652 FALSE), /* pcrel_offset */
1653
1654 /* Like GOT_TLSLD16, but no overflow. */
1655 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1656 0, /* rightshift */
1657 1, /* size (0 = byte, 1 = short, 2 = long) */
1658 16, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_dont, /* complain_on_overflow */
1662 ppc64_elf_unhandled_reloc, /* special_function */
1663 "R_PPC64_GOT_TLSLD16_LO", /* name */
1664 FALSE, /* partial_inplace */
1665 0, /* src_mask */
1666 0xffff, /* dst_mask */
1667 FALSE), /* pcrel_offset */
1668
1669 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1670 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1671 16, /* rightshift */
1672 1, /* size (0 = byte, 1 = short, 2 = long) */
1673 16, /* bitsize */
1674 FALSE, /* pc_relative */
1675 0, /* bitpos */
1676 complain_overflow_dont, /* complain_on_overflow */
1677 ppc64_elf_unhandled_reloc, /* special_function */
1678 "R_PPC64_GOT_TLSLD16_HI", /* name */
1679 FALSE, /* partial_inplace */
1680 0, /* src_mask */
1681 0xffff, /* dst_mask */
1682 FALSE), /* pcrel_offset */
1683
1684 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1685 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1686 16, /* rightshift */
1687 1, /* size (0 = byte, 1 = short, 2 = long) */
1688 16, /* bitsize */
1689 FALSE, /* pc_relative */
1690 0, /* bitpos */
1691 complain_overflow_dont, /* complain_on_overflow */
1692 ppc64_elf_unhandled_reloc, /* special_function */
1693 "R_PPC64_GOT_TLSLD16_HA", /* name */
1694 FALSE, /* partial_inplace */
1695 0, /* src_mask */
1696 0xffff, /* dst_mask */
1697 FALSE), /* pcrel_offset */
1698
1699 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1700 the offset to the entry relative to the TOC base (r2). */
1701 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1702 0, /* rightshift */
1703 1, /* size (0 = byte, 1 = short, 2 = long) */
1704 16, /* bitsize */
1705 FALSE, /* pc_relative */
1706 0, /* bitpos */
1707 complain_overflow_signed, /* complain_on_overflow */
1708 ppc64_elf_unhandled_reloc, /* special_function */
1709 "R_PPC64_GOT_DTPREL16_DS", /* name */
1710 FALSE, /* partial_inplace */
1711 0, /* src_mask */
1712 0xfffc, /* dst_mask */
1713 FALSE), /* pcrel_offset */
1714
1715 /* Like GOT_DTPREL16_DS, but no overflow. */
1716 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1717 0, /* rightshift */
1718 1, /* size (0 = byte, 1 = short, 2 = long) */
1719 16, /* bitsize */
1720 FALSE, /* pc_relative */
1721 0, /* bitpos */
1722 complain_overflow_dont, /* complain_on_overflow */
1723 ppc64_elf_unhandled_reloc, /* special_function */
1724 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1725 FALSE, /* partial_inplace */
1726 0, /* src_mask */
1727 0xfffc, /* dst_mask */
1728 FALSE), /* pcrel_offset */
1729
1730 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1731 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1732 16, /* rightshift */
1733 1, /* size (0 = byte, 1 = short, 2 = long) */
1734 16, /* bitsize */
1735 FALSE, /* pc_relative */
1736 0, /* bitpos */
1737 complain_overflow_dont, /* complain_on_overflow */
1738 ppc64_elf_unhandled_reloc, /* special_function */
1739 "R_PPC64_GOT_DTPREL16_HI", /* name */
1740 FALSE, /* partial_inplace */
1741 0, /* src_mask */
1742 0xffff, /* dst_mask */
1743 FALSE), /* pcrel_offset */
1744
1745 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1746 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1747 16, /* rightshift */
1748 1, /* size (0 = byte, 1 = short, 2 = long) */
1749 16, /* bitsize */
1750 FALSE, /* pc_relative */
1751 0, /* bitpos */
1752 complain_overflow_dont, /* complain_on_overflow */
1753 ppc64_elf_unhandled_reloc, /* special_function */
1754 "R_PPC64_GOT_DTPREL16_HA", /* name */
1755 FALSE, /* partial_inplace */
1756 0, /* src_mask */
1757 0xffff, /* dst_mask */
1758 FALSE), /* pcrel_offset */
1759
1760 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1761 offset to the entry relative to the TOC base (r2). */
1762 HOWTO (R_PPC64_GOT_TPREL16_DS,
1763 0, /* rightshift */
1764 1, /* size (0 = byte, 1 = short, 2 = long) */
1765 16, /* bitsize */
1766 FALSE, /* pc_relative */
1767 0, /* bitpos */
1768 complain_overflow_signed, /* complain_on_overflow */
1769 ppc64_elf_unhandled_reloc, /* special_function */
1770 "R_PPC64_GOT_TPREL16_DS", /* name */
1771 FALSE, /* partial_inplace */
1772 0, /* src_mask */
1773 0xfffc, /* dst_mask */
1774 FALSE), /* pcrel_offset */
1775
1776 /* Like GOT_TPREL16_DS, but no overflow. */
1777 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1778 0, /* rightshift */
1779 1, /* size (0 = byte, 1 = short, 2 = long) */
1780 16, /* bitsize */
1781 FALSE, /* pc_relative */
1782 0, /* bitpos */
1783 complain_overflow_dont, /* complain_on_overflow */
1784 ppc64_elf_unhandled_reloc, /* special_function */
1785 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1786 FALSE, /* partial_inplace */
1787 0, /* src_mask */
1788 0xfffc, /* dst_mask */
1789 FALSE), /* pcrel_offset */
1790
1791 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1792 HOWTO (R_PPC64_GOT_TPREL16_HI,
1793 16, /* rightshift */
1794 1, /* size (0 = byte, 1 = short, 2 = long) */
1795 16, /* bitsize */
1796 FALSE, /* pc_relative */
1797 0, /* bitpos */
1798 complain_overflow_dont, /* complain_on_overflow */
1799 ppc64_elf_unhandled_reloc, /* special_function */
1800 "R_PPC64_GOT_TPREL16_HI", /* name */
1801 FALSE, /* partial_inplace */
1802 0, /* src_mask */
1803 0xffff, /* dst_mask */
1804 FALSE), /* pcrel_offset */
1805
1806 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1807 HOWTO (R_PPC64_GOT_TPREL16_HA,
1808 16, /* rightshift */
1809 1, /* size (0 = byte, 1 = short, 2 = long) */
1810 16, /* bitsize */
1811 FALSE, /* pc_relative */
1812 0, /* bitpos */
1813 complain_overflow_dont, /* complain_on_overflow */
1814 ppc64_elf_unhandled_reloc, /* special_function */
1815 "R_PPC64_GOT_TPREL16_HA", /* name */
1816 FALSE, /* partial_inplace */
1817 0, /* src_mask */
1818 0xffff, /* dst_mask */
1819 FALSE), /* pcrel_offset */
1820
1821 /* GNU extension to record C++ vtable hierarchy. */
1822 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1823 0, /* rightshift */
1824 0, /* size (0 = byte, 1 = short, 2 = long) */
1825 0, /* bitsize */
1826 FALSE, /* pc_relative */
1827 0, /* bitpos */
1828 complain_overflow_dont, /* complain_on_overflow */
1829 NULL, /* special_function */
1830 "R_PPC64_GNU_VTINHERIT", /* name */
1831 FALSE, /* partial_inplace */
1832 0, /* src_mask */
1833 0, /* dst_mask */
1834 FALSE), /* pcrel_offset */
1835
1836 /* GNU extension to record C++ vtable member usage. */
1837 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1838 0, /* rightshift */
1839 0, /* size (0 = byte, 1 = short, 2 = long) */
1840 0, /* bitsize */
1841 FALSE, /* pc_relative */
1842 0, /* bitpos */
1843 complain_overflow_dont, /* complain_on_overflow */
1844 NULL, /* special_function */
1845 "R_PPC64_GNU_VTENTRY", /* name */
1846 FALSE, /* partial_inplace */
1847 0, /* src_mask */
1848 0, /* dst_mask */
1849 FALSE), /* pcrel_offset */
1850 };
1851
1852 \f
1853 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1854 be done. */
1855
1856 static void
1857 ppc_howto_init (void)
1858 {
1859 unsigned int i, type;
1860
1861 for (i = 0;
1862 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1863 i++)
1864 {
1865 type = ppc64_elf_howto_raw[i].type;
1866 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1867 / sizeof (ppc64_elf_howto_table[0])));
1868 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1869 }
1870 }
1871
1872 static reloc_howto_type *
1873 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1874 bfd_reloc_code_real_type code)
1875 {
1876 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1877
1878 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1879 /* Initialize howto table if needed. */
1880 ppc_howto_init ();
1881
1882 switch (code)
1883 {
1884 default:
1885 return NULL;
1886
1887 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1888 break;
1889 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1890 break;
1891 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1892 break;
1893 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1894 break;
1895 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1896 break;
1897 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1898 break;
1899 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1900 break;
1901 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1902 break;
1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1904 break;
1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1906 break;
1907 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1908 break;
1909 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1910 break;
1911 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1912 break;
1913 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1914 break;
1915 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1916 break;
1917 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1918 break;
1919 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1920 break;
1921 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1922 break;
1923 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1924 break;
1925 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1926 break;
1927 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1928 break;
1929 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1930 break;
1931 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1932 break;
1933 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1934 break;
1935 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1936 break;
1937 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1938 break;
1939 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1940 break;
1941 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1942 break;
1943 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1944 break;
1945 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1946 break;
1947 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1948 break;
1949 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1950 break;
1951 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1952 break;
1953 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1954 break;
1955 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1956 break;
1957 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1958 break;
1959 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1960 break;
1961 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1962 break;
1963 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1964 break;
1965 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1966 break;
1967 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1968 break;
1969 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1970 break;
1971 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1972 break;
1973 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1974 break;
1975 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1976 break;
1977 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1978 break;
1979 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1980 break;
1981 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1982 break;
1983 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1984 break;
1985 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1986 break;
1987 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1988 break;
1989 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1990 break;
1991 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1992 break;
1993 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1994 break;
1995 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1996 break;
1997 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1998 break;
1999 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2000 break;
2001 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2002 break;
2003 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2004 break;
2005 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2006 break;
2007 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2008 break;
2009 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2010 break;
2011 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2012 break;
2013 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2014 break;
2015 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2016 break;
2017 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2018 break;
2019 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2020 break;
2021 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2022 break;
2023 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2024 break;
2025 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2026 break;
2027 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2028 break;
2029 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2030 break;
2031 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2032 break;
2033 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2034 break;
2035 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2036 break;
2037 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2038 break;
2039 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2040 break;
2041 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2050 break;
2051 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2052 break;
2053 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2054 break;
2055 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2056 break;
2057 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2058 break;
2059 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2060 break;
2061 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2062 break;
2063 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2064 break;
2065 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2066 break;
2067 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2068 break;
2069 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2070 break;
2071 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2072 break;
2073 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2074 break;
2075 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2076 break;
2077 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2078 break;
2079 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2080 break;
2081 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2082 break;
2083 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2084 break;
2085 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2086 break;
2087 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2088 break;
2089 }
2090
2091 return ppc64_elf_howto_table[r];
2092 };
2093
2094 /* Set the howto pointer for a PowerPC ELF reloc. */
2095
2096 static void
2097 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2098 Elf_Internal_Rela *dst)
2099 {
2100 unsigned int type;
2101
2102 /* Initialize howto table if needed. */
2103 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2104 ppc_howto_init ();
2105
2106 type = ELF64_R_TYPE (dst->r_info);
2107 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2108 / sizeof (ppc64_elf_howto_table[0])));
2109 cache_ptr->howto = ppc64_elf_howto_table[type];
2110 }
2111
2112 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2113
2114 static bfd_reloc_status_type
2115 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2116 void *data, asection *input_section,
2117 bfd *output_bfd, char **error_message)
2118 {
2119 /* If this is a relocatable link (output_bfd test tells us), just
2120 call the generic function. Any adjustment will be done at final
2121 link time. */
2122 if (output_bfd != NULL)
2123 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2124 input_section, output_bfd, error_message);
2125
2126 /* Adjust the addend for sign extension of the low 16 bits.
2127 We won't actually be using the low 16 bits, so trashing them
2128 doesn't matter. */
2129 reloc_entry->addend += 0x8000;
2130 return bfd_reloc_continue;
2131 }
2132
2133 static bfd_reloc_status_type
2134 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2135 void *data, asection *input_section,
2136 bfd *output_bfd, char **error_message)
2137 {
2138 long insn;
2139 enum elf_ppc64_reloc_type r_type;
2140 bfd_size_type octets;
2141 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2142 bfd_boolean is_power4 = FALSE;
2143
2144 /* If this is a relocatable link (output_bfd test tells us), just
2145 call the generic function. Any adjustment will be done at final
2146 link time. */
2147 if (output_bfd != NULL)
2148 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2149 input_section, output_bfd, error_message);
2150
2151 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2152 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2153 insn &= ~(0x01 << 21);
2154 r_type = reloc_entry->howto->type;
2155 if (r_type == R_PPC64_ADDR14_BRTAKEN
2156 || r_type == R_PPC64_REL14_BRTAKEN)
2157 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2158
2159 if (is_power4)
2160 {
2161 /* Set 'a' bit. This is 0b00010 in BO field for branch
2162 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2163 for branch on CTR insns (BO == 1a00t or 1a01t). */
2164 if ((insn & (0x14 << 21)) == (0x04 << 21))
2165 insn |= 0x02 << 21;
2166 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2167 insn |= 0x08 << 21;
2168 else
2169 return bfd_reloc_continue;
2170 }
2171 else
2172 {
2173 bfd_vma target = 0;
2174 bfd_vma from;
2175
2176 if (!bfd_is_com_section (symbol->section))
2177 target = symbol->value;
2178 target += symbol->section->output_section->vma;
2179 target += symbol->section->output_offset;
2180 target += reloc_entry->addend;
2181
2182 from = (reloc_entry->address
2183 + input_section->output_offset
2184 + input_section->output_section->vma);
2185
2186 /* Invert 'y' bit if not the default. */
2187 if ((bfd_signed_vma) (target - from) < 0)
2188 insn ^= 0x01 << 21;
2189 }
2190 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2191 return bfd_reloc_continue;
2192 }
2193
2194 static bfd_reloc_status_type
2195 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2196 void *data, asection *input_section,
2197 bfd *output_bfd, char **error_message)
2198 {
2199 /* If this is a relocatable link (output_bfd test tells us), just
2200 call the generic function. Any adjustment will be done at final
2201 link time. */
2202 if (output_bfd != NULL)
2203 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2204 input_section, output_bfd, error_message);
2205
2206 /* Subtract the symbol section base address. */
2207 reloc_entry->addend -= symbol->section->output_section->vma;
2208 return bfd_reloc_continue;
2209 }
2210
2211 static bfd_reloc_status_type
2212 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2213 void *data, asection *input_section,
2214 bfd *output_bfd, char **error_message)
2215 {
2216 /* If this is a relocatable link (output_bfd test tells us), just
2217 call the generic function. Any adjustment will be done at final
2218 link time. */
2219 if (output_bfd != NULL)
2220 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2221 input_section, output_bfd, error_message);
2222
2223 /* Subtract the symbol section base address. */
2224 reloc_entry->addend -= symbol->section->output_section->vma;
2225
2226 /* Adjust the addend for sign extension of the low 16 bits. */
2227 reloc_entry->addend += 0x8000;
2228 return bfd_reloc_continue;
2229 }
2230
2231 static bfd_reloc_status_type
2232 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2233 void *data, asection *input_section,
2234 bfd *output_bfd, char **error_message)
2235 {
2236 bfd_vma TOCstart;
2237
2238 /* If this is a relocatable link (output_bfd test tells us), just
2239 call the generic function. Any adjustment will be done at final
2240 link time. */
2241 if (output_bfd != NULL)
2242 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2243 input_section, output_bfd, error_message);
2244
2245 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2246 if (TOCstart == 0)
2247 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2248
2249 /* Subtract the TOC base address. */
2250 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2251 return bfd_reloc_continue;
2252 }
2253
2254 static bfd_reloc_status_type
2255 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2256 void *data, asection *input_section,
2257 bfd *output_bfd, char **error_message)
2258 {
2259 bfd_vma TOCstart;
2260
2261 /* If this is a relocatable link (output_bfd test tells us), just
2262 call the generic function. Any adjustment will be done at final
2263 link time. */
2264 if (output_bfd != NULL)
2265 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2266 input_section, output_bfd, error_message);
2267
2268 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2269 if (TOCstart == 0)
2270 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2271
2272 /* Subtract the TOC base address. */
2273 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2274
2275 /* Adjust the addend for sign extension of the low 16 bits. */
2276 reloc_entry->addend += 0x8000;
2277 return bfd_reloc_continue;
2278 }
2279
2280 static bfd_reloc_status_type
2281 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2282 void *data, asection *input_section,
2283 bfd *output_bfd, char **error_message)
2284 {
2285 bfd_vma TOCstart;
2286 bfd_size_type octets;
2287
2288 /* If this is a relocatable link (output_bfd test tells us), just
2289 call the generic function. Any adjustment will be done at final
2290 link time. */
2291 if (output_bfd != NULL)
2292 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2293 input_section, output_bfd, error_message);
2294
2295 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2296 if (TOCstart == 0)
2297 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2298
2299 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2300 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2301 return bfd_reloc_ok;
2302 }
2303
2304 static bfd_reloc_status_type
2305 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2306 void *data, asection *input_section,
2307 bfd *output_bfd, char **error_message)
2308 {
2309 /* If this is a relocatable link (output_bfd test tells us), just
2310 call the generic function. Any adjustment will be done at final
2311 link time. */
2312 if (output_bfd != NULL)
2313 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2314 input_section, output_bfd, error_message);
2315
2316 if (error_message != NULL)
2317 {
2318 static char buf[60];
2319 sprintf (buf, "generic linker can't handle %s",
2320 reloc_entry->howto->name);
2321 *error_message = buf;
2322 }
2323 return bfd_reloc_dangerous;
2324 }
2325
2326 struct ppc64_elf_obj_tdata
2327 {
2328 struct elf_obj_tdata elf;
2329
2330 /* Shortcuts to dynamic linker sections. */
2331 asection *got;
2332 asection *relgot;
2333
2334 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2335 sections means we potentially need one of these for each input bfd. */
2336 union {
2337 bfd_signed_vma refcount;
2338 bfd_vma offset;
2339 } tlsld_got;
2340 };
2341
2342 #define ppc64_elf_tdata(bfd) \
2343 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2344
2345 #define ppc64_tlsld_got(bfd) \
2346 (&ppc64_elf_tdata (bfd)->tlsld_got)
2347
2348 /* Override the generic function because we store some extras. */
2349
2350 static bfd_boolean
2351 ppc64_elf_mkobject (bfd *abfd)
2352 {
2353 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2354 abfd->tdata.any = bfd_zalloc (abfd, amt);
2355 if (abfd->tdata.any == NULL)
2356 return FALSE;
2357 return TRUE;
2358 }
2359
2360 /* Fix bad default arch selected for a 64 bit input bfd when the
2361 default is 32 bit. */
2362
2363 static bfd_boolean
2364 ppc64_elf_object_p (bfd *abfd)
2365 {
2366 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2367 {
2368 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2369
2370 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2371 {
2372 /* Relies on arch after 32 bit default being 64 bit default. */
2373 abfd->arch_info = abfd->arch_info->next;
2374 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2375 }
2376 }
2377 return TRUE;
2378 }
2379
2380 /* Support for core dump NOTE sections. */
2381
2382 static bfd_boolean
2383 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2384 {
2385 size_t offset, size;
2386
2387 if (note->descsz != 504)
2388 return FALSE;
2389
2390 /* pr_cursig */
2391 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2392
2393 /* pr_pid */
2394 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2395
2396 /* pr_reg */
2397 offset = 112;
2398 size = 384;
2399
2400 /* Make a ".reg/999" section. */
2401 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2402 size, note->descpos + offset);
2403 }
2404
2405 static bfd_boolean
2406 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2407 {
2408 if (note->descsz != 136)
2409 return FALSE;
2410
2411 elf_tdata (abfd)->core_program
2412 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2413 elf_tdata (abfd)->core_command
2414 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2415
2416 return TRUE;
2417 }
2418
2419 /* Merge backend specific data from an object file to the output
2420 object file when linking. */
2421
2422 static bfd_boolean
2423 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2424 {
2425 /* Check if we have the same endianess. */
2426 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2427 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2428 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2429 {
2430 const char *msg;
2431
2432 if (bfd_big_endian (ibfd))
2433 msg = _("%s: compiled for a big endian system "
2434 "and target is little endian");
2435 else
2436 msg = _("%s: compiled for a little endian system "
2437 "and target is big endian");
2438
2439 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2440
2441 bfd_set_error (bfd_error_wrong_format);
2442 return FALSE;
2443 }
2444
2445 return TRUE;
2446 }
2447
2448 /* Add extra PPC sections. */
2449
2450 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2451 {
2452 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2453 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2454 { ".plt", 4, 0, SHT_NOBITS, 0 },
2455 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2456 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2457 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2458 { NULL, 0, 0, 0, 0 }
2459 };
2460
2461 struct _ppc64_elf_section_data
2462 {
2463 struct bfd_elf_section_data elf;
2464
2465 /* An array with one entry for each opd function descriptor. */
2466 union
2467 {
2468 /* Points to the function code section for local opd entries. */
2469 asection **func_sec;
2470 /* After editing .opd, adjust references to opd local syms. */
2471 long *adjust;
2472 } opd;
2473
2474 /* An array for toc sections, indexed by offset/8.
2475 Specifies the relocation symbol index used at a given toc offset. */
2476 unsigned *t_symndx;
2477 };
2478
2479 #define ppc64_elf_section_data(sec) \
2480 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2481
2482 static bfd_boolean
2483 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2484 {
2485 struct _ppc64_elf_section_data *sdata;
2486 bfd_size_type amt = sizeof (*sdata);
2487
2488 sdata = bfd_zalloc (abfd, amt);
2489 if (sdata == NULL)
2490 return FALSE;
2491 sec->used_by_bfd = sdata;
2492
2493 return _bfd_elf_new_section_hook (abfd, sec);
2494 }
2495
2496 static void *
2497 get_opd_info (asection * sec)
2498 {
2499 if (sec != NULL
2500 && ppc64_elf_section_data (sec) != NULL
2501 && ppc64_elf_section_data (sec)->opd.adjust != NULL)
2502 return ppc64_elf_section_data (sec)->opd.adjust;
2503 return NULL;
2504 }
2505 \f
2506 /* The following functions are specific to the ELF linker, while
2507 functions above are used generally. Those named ppc64_elf_* are
2508 called by the main ELF linker code. They appear in this file more
2509 or less in the order in which they are called. eg.
2510 ppc64_elf_check_relocs is called early in the link process,
2511 ppc64_elf_finish_dynamic_sections is one of the last functions
2512 called.
2513
2514 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2515 functions have both a function code symbol and a function descriptor
2516 symbol. A call to foo in a relocatable object file looks like:
2517
2518 . .text
2519 . x:
2520 . bl .foo
2521 . nop
2522
2523 The function definition in another object file might be:
2524
2525 . .section .opd
2526 . foo: .quad .foo
2527 . .quad .TOC.@tocbase
2528 . .quad 0
2529 .
2530 . .text
2531 . .foo: blr
2532
2533 When the linker resolves the call during a static link, the branch
2534 unsurprisingly just goes to .foo and the .opd information is unused.
2535 If the function definition is in a shared library, things are a little
2536 different: The call goes via a plt call stub, the opd information gets
2537 copied to the plt, and the linker patches the nop.
2538
2539 . x:
2540 . bl .foo_stub
2541 . ld 2,40(1)
2542 .
2543 .
2544 . .foo_stub:
2545 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2546 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2547 . std 2,40(1) # this is the general idea
2548 . ld 11,0(12)
2549 . ld 2,8(12)
2550 . mtctr 11
2551 . ld 11,16(12)
2552 . bctr
2553 .
2554 . .section .plt
2555 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2556
2557 The "reloc ()" notation is supposed to indicate that the linker emits
2558 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2559 copying.
2560
2561 What are the difficulties here? Well, firstly, the relocations
2562 examined by the linker in check_relocs are against the function code
2563 sym .foo, while the dynamic relocation in the plt is emitted against
2564 the function descriptor symbol, foo. Somewhere along the line, we need
2565 to carefully copy dynamic link information from one symbol to the other.
2566 Secondly, the generic part of the elf linker will make .foo a dynamic
2567 symbol as is normal for most other backends. We need foo dynamic
2568 instead, at least for an application final link. However, when
2569 creating a shared library containing foo, we need to have both symbols
2570 dynamic so that references to .foo are satisfied during the early
2571 stages of linking. Otherwise the linker might decide to pull in a
2572 definition from some other object, eg. a static library. */
2573
2574 /* The linker needs to keep track of the number of relocs that it
2575 decides to copy as dynamic relocs in check_relocs for each symbol.
2576 This is so that it can later discard them if they are found to be
2577 unnecessary. We store the information in a field extending the
2578 regular ELF linker hash table. */
2579
2580 struct ppc_dyn_relocs
2581 {
2582 struct ppc_dyn_relocs *next;
2583
2584 /* The input section of the reloc. */
2585 asection *sec;
2586
2587 /* Total number of relocs copied for the input section. */
2588 bfd_size_type count;
2589
2590 /* Number of pc-relative relocs copied for the input section. */
2591 bfd_size_type pc_count;
2592 };
2593
2594 /* Track GOT entries needed for a given symbol. We might need more
2595 than one got entry per symbol. */
2596 struct got_entry
2597 {
2598 struct got_entry *next;
2599
2600 /* The symbol addend that we'll be placing in the GOT. */
2601 bfd_vma addend;
2602
2603 /* Unlike other ELF targets, we use separate GOT entries for the same
2604 symbol referenced from different input files. This is to support
2605 automatic multiple TOC/GOT sections, where the TOC base can vary
2606 from one input file to another.
2607
2608 Point to the BFD owning this GOT entry. */
2609 bfd *owner;
2610
2611 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2612 TLS_TPREL or TLS_DTPREL for tls entries. */
2613 char tls_type;
2614
2615 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2616 union
2617 {
2618 bfd_signed_vma refcount;
2619 bfd_vma offset;
2620 } got;
2621 };
2622
2623 /* The same for PLT. */
2624 struct plt_entry
2625 {
2626 struct plt_entry *next;
2627
2628 bfd_vma addend;
2629
2630 union
2631 {
2632 bfd_signed_vma refcount;
2633 bfd_vma offset;
2634 } plt;
2635 };
2636
2637 /* Of those relocs that might be copied as dynamic relocs, this macro
2638 selects those that must be copied when linking a shared library,
2639 even when the symbol is local. */
2640
2641 #define MUST_BE_DYN_RELOC(RTYPE) \
2642 ((RTYPE) != R_PPC64_REL32 \
2643 && (RTYPE) != R_PPC64_REL64 \
2644 && (RTYPE) != R_PPC64_REL30)
2645
2646 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2647 copying dynamic variables from a shared lib into an app's dynbss
2648 section, and instead use a dynamic relocation to point into the
2649 shared lib. With code that gcc generates, it's vital that this be
2650 enabled; In the PowerPC64 ABI, the address of a function is actually
2651 the address of a function descriptor, which resides in the .opd
2652 section. gcc uses the descriptor directly rather than going via the
2653 GOT as some other ABI's do, which means that initialized function
2654 pointers must reference the descriptor. Thus, a function pointer
2655 initialized to the address of a function in a shared library will
2656 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2657 redefines the function descriptor symbol to point to the copy. This
2658 presents a problem as a plt entry for that function is also
2659 initialized from the function descriptor symbol and the copy reloc
2660 may not be initialized first. */
2661 #define ELIMINATE_COPY_RELOCS 1
2662
2663 /* Section name for stubs is the associated section name plus this
2664 string. */
2665 #define STUB_SUFFIX ".stub"
2666
2667 /* Linker stubs.
2668 ppc_stub_long_branch:
2669 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2670 destination, but a 24 bit branch in a stub section will reach.
2671 . b dest
2672
2673 ppc_stub_plt_branch:
2674 Similar to the above, but a 24 bit branch in the stub section won't
2675 reach its destination.
2676 . addis %r12,%r2,xxx@toc@ha
2677 . ld %r11,xxx@toc@l(%r12)
2678 . mtctr %r11
2679 . bctr
2680
2681 ppc_stub_plt_call:
2682 Used to call a function in a shared library. If it so happens that
2683 the plt entry referenced crosses a 64k boundary, then an extra
2684 "addis %r12,%r12,1" will be inserted before the load at xxx+8 or
2685 xxx+16 as appropriate.
2686 . addis %r12,%r2,xxx@toc@ha
2687 . std %r2,40(%r1)
2688 . ld %r11,xxx+0@toc@l(%r12)
2689 . ld %r2,xxx+8@toc@l(%r12)
2690 . mtctr %r11
2691 . ld %r11,xxx+16@toc@l(%r12)
2692 . bctr
2693
2694 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2695 code to adjust the value and save r2 to support multiple toc sections.
2696 A ppc_stub_long_branch with an r2 offset looks like:
2697 . std %r2,40(%r1)
2698 . addis %r2,%r2,off@ha
2699 . addi %r2,%r2,off@l
2700 . b dest
2701
2702 A ppc_stub_plt_branch with an r2 offset looks like:
2703 . std %r2,40(%r1)
2704 . addis %r12,%r2,xxx@toc@ha
2705 . ld %r11,xxx@toc@l(%r12)
2706 . addis %r2,%r2,off@ha
2707 . addi %r2,%r2,off@l
2708 . mtctr %r11
2709 . bctr
2710 */
2711
2712 enum ppc_stub_type {
2713 ppc_stub_none,
2714 ppc_stub_long_branch,
2715 ppc_stub_long_branch_r2off,
2716 ppc_stub_plt_branch,
2717 ppc_stub_plt_branch_r2off,
2718 ppc_stub_plt_call
2719 };
2720
2721 struct ppc_stub_hash_entry {
2722
2723 /* Base hash table entry structure. */
2724 struct bfd_hash_entry root;
2725
2726 enum ppc_stub_type stub_type;
2727
2728 /* The stub section. */
2729 asection *stub_sec;
2730
2731 /* Offset within stub_sec of the beginning of this stub. */
2732 bfd_vma stub_offset;
2733
2734 /* Given the symbol's value and its section we can determine its final
2735 value when building the stubs (so the stub knows where to jump. */
2736 bfd_vma target_value;
2737 asection *target_section;
2738
2739 /* The symbol table entry, if any, that this was derived from. */
2740 struct ppc_link_hash_entry *h;
2741
2742 /* And the reloc addend that this was derived from. */
2743 bfd_vma addend;
2744
2745 /* Where this stub is being called from, or, in the case of combined
2746 stub sections, the first input section in the group. */
2747 asection *id_sec;
2748 };
2749
2750 struct ppc_branch_hash_entry {
2751
2752 /* Base hash table entry structure. */
2753 struct bfd_hash_entry root;
2754
2755 /* Offset within .branch_lt. */
2756 unsigned int offset;
2757
2758 /* Generation marker. */
2759 unsigned int iter;
2760 };
2761
2762 struct ppc_link_hash_entry
2763 {
2764 struct elf_link_hash_entry elf;
2765
2766 /* A pointer to the most recently used stub hash entry against this
2767 symbol. */
2768 struct ppc_stub_hash_entry *stub_cache;
2769
2770 /* Track dynamic relocs copied for this symbol. */
2771 struct ppc_dyn_relocs *dyn_relocs;
2772
2773 /* Link between function code and descriptor symbols. */
2774 struct ppc_link_hash_entry *oh;
2775
2776 /* Flag function code and descriptor symbols. */
2777 unsigned int is_func:1;
2778 unsigned int is_func_descriptor:1;
2779 unsigned int is_entry:1;
2780
2781 /* Whether global opd sym has been adjusted or not. */
2782 unsigned int adjust_done:1;
2783
2784 /* Contexts in which symbol is used in the GOT (or TOC).
2785 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2786 corresponding relocs are encountered during check_relocs.
2787 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2788 indicate the corresponding GOT entry type is not needed.
2789 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2790 a TPREL one. We use a separate flag rather than setting TPREL
2791 just for convenience in distinguishing the two cases. */
2792 #define TLS_GD 1 /* GD reloc. */
2793 #define TLS_LD 2 /* LD reloc. */
2794 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2795 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2796 #define TLS_TLS 16 /* Any TLS reloc. */
2797 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2798 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2799 char tls_mask;
2800 };
2801
2802 /* ppc64 ELF linker hash table. */
2803
2804 struct ppc_link_hash_table
2805 {
2806 struct elf_link_hash_table elf;
2807
2808 /* The stub hash table. */
2809 struct bfd_hash_table stub_hash_table;
2810
2811 /* Another hash table for plt_branch stubs. */
2812 struct bfd_hash_table branch_hash_table;
2813
2814 /* Linker stub bfd. */
2815 bfd *stub_bfd;
2816
2817 /* Linker call-backs. */
2818 asection * (*add_stub_section) (const char *, asection *);
2819 void (*layout_sections_again) (void);
2820
2821 /* Array to keep track of which stub sections have been created, and
2822 information on stub grouping. */
2823 struct map_stub {
2824 /* This is the section to which stubs in the group will be attached. */
2825 asection *link_sec;
2826 /* The stub section. */
2827 asection *stub_sec;
2828 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2829 bfd_vma toc_off;
2830 } *stub_group;
2831
2832 /* Support for multiple toc sections. */
2833 unsigned int no_multi_toc;
2834 unsigned int multi_toc_needed;
2835
2836 /* Temp used when calculating TOC pointers. */
2837 bfd_vma toc_curr;
2838
2839 /* Highest input section id. */
2840 int top_id;
2841
2842 /* Highest output section index. */
2843 int top_index;
2844
2845 /* List of input sections for each output section. */
2846 asection **input_list;
2847
2848 /* Short-cuts to get to dynamic linker sections. */
2849 asection *got;
2850 asection *plt;
2851 asection *relplt;
2852 asection *dynbss;
2853 asection *relbss;
2854 asection *glink;
2855 asection *sfpr;
2856 asection *brlt;
2857 asection *relbrlt;
2858
2859 /* Shortcut to .__tls_get_addr. */
2860 struct elf_link_hash_entry *tls_get_addr;
2861
2862 /* Statistics. */
2863 unsigned long stub_count[ppc_stub_plt_call];
2864
2865 /* Set if we should emit symbols for stubs. */
2866 unsigned int emit_stub_syms;
2867
2868 /* Set on error. */
2869 unsigned int stub_error;
2870
2871 /* Flag set when small branches are detected. Used to
2872 select suitable defaults for the stub group size. */
2873 unsigned int has_14bit_branch;
2874
2875 /* Incremented every time we size stubs. */
2876 unsigned int stub_iteration;
2877
2878 /* Small local sym to section mapping cache. */
2879 struct sym_sec_cache sym_sec;
2880 };
2881
2882 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2883
2884 #define ppc_hash_table(p) \
2885 ((struct ppc_link_hash_table *) ((p)->hash))
2886
2887 #define ppc_stub_hash_lookup(table, string, create, copy) \
2888 ((struct ppc_stub_hash_entry *) \
2889 bfd_hash_lookup ((table), (string), (create), (copy)))
2890
2891 #define ppc_branch_hash_lookup(table, string, create, copy) \
2892 ((struct ppc_branch_hash_entry *) \
2893 bfd_hash_lookup ((table), (string), (create), (copy)))
2894
2895 /* Create an entry in the stub hash table. */
2896
2897 static struct bfd_hash_entry *
2898 stub_hash_newfunc (struct bfd_hash_entry *entry,
2899 struct bfd_hash_table *table,
2900 const char *string)
2901 {
2902 /* Allocate the structure if it has not already been allocated by a
2903 subclass. */
2904 if (entry == NULL)
2905 {
2906 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2907 if (entry == NULL)
2908 return entry;
2909 }
2910
2911 /* Call the allocation method of the superclass. */
2912 entry = bfd_hash_newfunc (entry, table, string);
2913 if (entry != NULL)
2914 {
2915 struct ppc_stub_hash_entry *eh;
2916
2917 /* Initialize the local fields. */
2918 eh = (struct ppc_stub_hash_entry *) entry;
2919 eh->stub_type = ppc_stub_none;
2920 eh->stub_sec = NULL;
2921 eh->stub_offset = 0;
2922 eh->target_value = 0;
2923 eh->target_section = NULL;
2924 eh->h = NULL;
2925 eh->id_sec = NULL;
2926 }
2927
2928 return entry;
2929 }
2930
2931 /* Create an entry in the branch hash table. */
2932
2933 static struct bfd_hash_entry *
2934 branch_hash_newfunc (struct bfd_hash_entry *entry,
2935 struct bfd_hash_table *table,
2936 const char *string)
2937 {
2938 /* Allocate the structure if it has not already been allocated by a
2939 subclass. */
2940 if (entry == NULL)
2941 {
2942 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2943 if (entry == NULL)
2944 return entry;
2945 }
2946
2947 /* Call the allocation method of the superclass. */
2948 entry = bfd_hash_newfunc (entry, table, string);
2949 if (entry != NULL)
2950 {
2951 struct ppc_branch_hash_entry *eh;
2952
2953 /* Initialize the local fields. */
2954 eh = (struct ppc_branch_hash_entry *) entry;
2955 eh->offset = 0;
2956 eh->iter = 0;
2957 }
2958
2959 return entry;
2960 }
2961
2962 /* Create an entry in a ppc64 ELF linker hash table. */
2963
2964 static struct bfd_hash_entry *
2965 link_hash_newfunc (struct bfd_hash_entry *entry,
2966 struct bfd_hash_table *table,
2967 const char *string)
2968 {
2969 /* Allocate the structure if it has not already been allocated by a
2970 subclass. */
2971 if (entry == NULL)
2972 {
2973 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2974 if (entry == NULL)
2975 return entry;
2976 }
2977
2978 /* Call the allocation method of the superclass. */
2979 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2980 if (entry != NULL)
2981 {
2982 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2983
2984 eh->stub_cache = NULL;
2985 eh->dyn_relocs = NULL;
2986 eh->oh = NULL;
2987 eh->is_func = 0;
2988 eh->is_func_descriptor = 0;
2989 eh->is_entry = 0;
2990 eh->adjust_done = 0;
2991 eh->tls_mask = 0;
2992 }
2993
2994 return entry;
2995 }
2996
2997 /* Create a ppc64 ELF linker hash table. */
2998
2999 static struct bfd_link_hash_table *
3000 ppc64_elf_link_hash_table_create (bfd *abfd)
3001 {
3002 struct ppc_link_hash_table *htab;
3003 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3004
3005 htab = bfd_zmalloc (amt);
3006 if (htab == NULL)
3007 return NULL;
3008
3009 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3010 {
3011 free (htab);
3012 return NULL;
3013 }
3014
3015 /* Init the stub hash table too. */
3016 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3017 return NULL;
3018
3019 /* And the branch hash table. */
3020 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3021 return NULL;
3022
3023 /* Initializing two fields of the union is just cosmetic. We really
3024 only care about glist, but when compiled on a 32-bit host the
3025 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3026 debugger inspection of these fields look nicer. */
3027 htab->elf.init_refcount.refcount = 0;
3028 htab->elf.init_refcount.glist = NULL;
3029 htab->elf.init_offset.offset = 0;
3030 htab->elf.init_offset.glist = NULL;
3031
3032 return &htab->elf.root;
3033 }
3034
3035 /* Free the derived linker hash table. */
3036
3037 static void
3038 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3039 {
3040 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3041
3042 bfd_hash_table_free (&ret->stub_hash_table);
3043 bfd_hash_table_free (&ret->branch_hash_table);
3044 _bfd_generic_link_hash_table_free (hash);
3045 }
3046
3047 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3048
3049 void
3050 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3051 {
3052 struct ppc_link_hash_table *htab;
3053
3054 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3055
3056 /* Always hook our dynamic sections into the first bfd, which is the
3057 linker created stub bfd. This ensures that the GOT header is at
3058 the start of the output TOC section. */
3059 htab = ppc_hash_table (info);
3060 htab->stub_bfd = abfd;
3061 htab->elf.dynobj = abfd;
3062 }
3063
3064 /* Build a name for an entry in the stub hash table. */
3065
3066 static char *
3067 ppc_stub_name (const asection *input_section,
3068 const asection *sym_sec,
3069 const struct ppc_link_hash_entry *h,
3070 const Elf_Internal_Rela *rel)
3071 {
3072 char *stub_name;
3073 bfd_size_type len;
3074
3075 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3076 offsets from a sym as a branch target? In fact, we could
3077 probably assume the addend is always zero. */
3078 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3079
3080 if (h)
3081 {
3082 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3083 stub_name = bfd_malloc (len);
3084 if (stub_name != NULL)
3085 {
3086 sprintf (stub_name, "%08x.%s+%x",
3087 input_section->id & 0xffffffff,
3088 h->elf.root.root.string,
3089 (int) rel->r_addend & 0xffffffff);
3090 }
3091 }
3092 else
3093 {
3094 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3095 stub_name = bfd_malloc (len);
3096 if (stub_name != NULL)
3097 {
3098 sprintf (stub_name, "%08x.%x:%x+%x",
3099 input_section->id & 0xffffffff,
3100 sym_sec->id & 0xffffffff,
3101 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3102 (int) rel->r_addend & 0xffffffff);
3103 }
3104 }
3105 return stub_name;
3106 }
3107
3108 /* Look up an entry in the stub hash. Stub entries are cached because
3109 creating the stub name takes a bit of time. */
3110
3111 static struct ppc_stub_hash_entry *
3112 ppc_get_stub_entry (const asection *input_section,
3113 const asection *sym_sec,
3114 struct elf_link_hash_entry *hash,
3115 const Elf_Internal_Rela *rel,
3116 struct ppc_link_hash_table *htab)
3117 {
3118 struct ppc_stub_hash_entry *stub_entry;
3119 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3120 const asection *id_sec;
3121
3122 /* If this input section is part of a group of sections sharing one
3123 stub section, then use the id of the first section in the group.
3124 Stub names need to include a section id, as there may well be
3125 more than one stub used to reach say, printf, and we need to
3126 distinguish between them. */
3127 id_sec = htab->stub_group[input_section->id].link_sec;
3128
3129 if (h != NULL && h->stub_cache != NULL
3130 && h->stub_cache->h == h
3131 && h->stub_cache->id_sec == id_sec)
3132 {
3133 stub_entry = h->stub_cache;
3134 }
3135 else
3136 {
3137 char *stub_name;
3138
3139 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3140 if (stub_name == NULL)
3141 return NULL;
3142
3143 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3144 stub_name, FALSE, FALSE);
3145 if (h != NULL)
3146 h->stub_cache = stub_entry;
3147
3148 free (stub_name);
3149 }
3150
3151 return stub_entry;
3152 }
3153
3154 /* Add a new stub entry to the stub hash. Not all fields of the new
3155 stub entry are initialised. */
3156
3157 static struct ppc_stub_hash_entry *
3158 ppc_add_stub (const char *stub_name,
3159 asection *section,
3160 struct ppc_link_hash_table *htab)
3161 {
3162 asection *link_sec;
3163 asection *stub_sec;
3164 struct ppc_stub_hash_entry *stub_entry;
3165
3166 link_sec = htab->stub_group[section->id].link_sec;
3167 stub_sec = htab->stub_group[section->id].stub_sec;
3168 if (stub_sec == NULL)
3169 {
3170 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3171 if (stub_sec == NULL)
3172 {
3173 size_t namelen;
3174 bfd_size_type len;
3175 char *s_name;
3176
3177 namelen = strlen (link_sec->name);
3178 len = namelen + sizeof (STUB_SUFFIX);
3179 s_name = bfd_alloc (htab->stub_bfd, len);
3180 if (s_name == NULL)
3181 return NULL;
3182
3183 memcpy (s_name, link_sec->name, namelen);
3184 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3185 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3186 if (stub_sec == NULL)
3187 return NULL;
3188 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3189 }
3190 htab->stub_group[section->id].stub_sec = stub_sec;
3191 }
3192
3193 /* Enter this entry into the linker stub hash table. */
3194 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3195 TRUE, FALSE);
3196 if (stub_entry == NULL)
3197 {
3198 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3199 bfd_archive_filename (section->owner),
3200 stub_name);
3201 return NULL;
3202 }
3203
3204 stub_entry->stub_sec = stub_sec;
3205 stub_entry->stub_offset = 0;
3206 stub_entry->id_sec = link_sec;
3207 return stub_entry;
3208 }
3209
3210 /* Create sections for linker generated code. */
3211
3212 static bfd_boolean
3213 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3214 {
3215 struct ppc_link_hash_table *htab;
3216 flagword flags;
3217
3218 htab = ppc_hash_table (info);
3219
3220 /* Create .sfpr for code to save and restore fp regs. */
3221 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3222 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3223 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3224 if (htab->sfpr == NULL
3225 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3226 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3227 return FALSE;
3228
3229 /* Create .glink for lazy dynamic linking support. */
3230 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3231 if (htab->glink == NULL
3232 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3233 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3234 return FALSE;
3235
3236 /* Create .branch_lt for plt_branch stubs. */
3237 flags = (SEC_ALLOC | SEC_LOAD
3238 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3239 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3240 if (htab->brlt == NULL
3241 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3242 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3243 return FALSE;
3244
3245 if (info->shared)
3246 {
3247 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3248 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3249 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3250 if (!htab->relbrlt
3251 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3252 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3253 return FALSE;
3254 }
3255 return TRUE;
3256 }
3257
3258 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3259 not already done. */
3260
3261 static bfd_boolean
3262 create_got_section (bfd *abfd, struct bfd_link_info *info)
3263 {
3264 asection *got, *relgot;
3265 flagword flags;
3266 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3267
3268 if (!htab->got)
3269 {
3270 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3271 return FALSE;
3272
3273 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3274 if (!htab->got)
3275 abort ();
3276 }
3277
3278 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3279 | SEC_LINKER_CREATED);
3280
3281 got = bfd_make_section (abfd, ".got");
3282 if (!got
3283 || !bfd_set_section_flags (abfd, got, flags)
3284 || !bfd_set_section_alignment (abfd, got, 3))
3285 return FALSE;
3286
3287 relgot = bfd_make_section (abfd, ".rela.got");
3288 if (!relgot
3289 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3290 || ! bfd_set_section_alignment (abfd, relgot, 3))
3291 return FALSE;
3292
3293 ppc64_elf_tdata (abfd)->got = got;
3294 ppc64_elf_tdata (abfd)->relgot = relgot;
3295 return TRUE;
3296 }
3297
3298 /* Create the dynamic sections, and set up shortcuts. */
3299
3300 static bfd_boolean
3301 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3302 {
3303 struct ppc_link_hash_table *htab;
3304
3305 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3306 return FALSE;
3307
3308 htab = ppc_hash_table (info);
3309 if (!htab->got)
3310 htab->got = bfd_get_section_by_name (dynobj, ".got");
3311 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3312 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3313 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3314 if (!info->shared)
3315 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3316
3317 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3318 || (!info->shared && !htab->relbss))
3319 abort ();
3320
3321 return TRUE;
3322 }
3323
3324 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3325
3326 static void
3327 ppc64_elf_copy_indirect_symbol
3328 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3329 struct elf_link_hash_entry *dir,
3330 struct elf_link_hash_entry *ind)
3331 {
3332 struct ppc_link_hash_entry *edir, *eind;
3333 flagword mask;
3334
3335 edir = (struct ppc_link_hash_entry *) dir;
3336 eind = (struct ppc_link_hash_entry *) ind;
3337
3338 /* Copy over any dynamic relocs we may have on the indirect sym. */
3339 if (eind->dyn_relocs != NULL)
3340 {
3341 if (edir->dyn_relocs != NULL)
3342 {
3343 struct ppc_dyn_relocs **pp;
3344 struct ppc_dyn_relocs *p;
3345
3346 if (eind->elf.root.type == bfd_link_hash_indirect)
3347 abort ();
3348
3349 /* Add reloc counts against the weak sym to the strong sym
3350 list. Merge any entries against the same section. */
3351 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3352 {
3353 struct ppc_dyn_relocs *q;
3354
3355 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3356 if (q->sec == p->sec)
3357 {
3358 q->pc_count += p->pc_count;
3359 q->count += p->count;
3360 *pp = p->next;
3361 break;
3362 }
3363 if (q == NULL)
3364 pp = &p->next;
3365 }
3366 *pp = edir->dyn_relocs;
3367 }
3368
3369 edir->dyn_relocs = eind->dyn_relocs;
3370 eind->dyn_relocs = NULL;
3371 }
3372
3373 edir->is_func |= eind->is_func;
3374 edir->is_func_descriptor |= eind->is_func_descriptor;
3375 edir->is_entry |= eind->is_entry;
3376 edir->tls_mask |= eind->tls_mask;
3377
3378 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3379 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3380 | ELF_LINK_HASH_NEEDS_PLT);
3381 /* If called to transfer flags for a weakdef during processing
3382 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3383 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3384 if (ELIMINATE_COPY_RELOCS
3385 && eind->elf.root.type != bfd_link_hash_indirect
3386 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3387 mask &= ~ELF_LINK_NON_GOT_REF;
3388
3389 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3390
3391 /* If we were called to copy over info for a weak sym, that's all. */
3392 if (eind->elf.root.type != bfd_link_hash_indirect)
3393 return;
3394
3395 /* Copy over got entries that we may have already seen to the
3396 symbol which just became indirect. */
3397 if (eind->elf.got.glist != NULL)
3398 {
3399 if (edir->elf.got.glist != NULL)
3400 {
3401 struct got_entry **entp;
3402 struct got_entry *ent;
3403
3404 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3405 {
3406 struct got_entry *dent;
3407
3408 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3409 if (dent->addend == ent->addend
3410 && dent->owner == ent->owner
3411 && dent->tls_type == ent->tls_type)
3412 {
3413 dent->got.refcount += ent->got.refcount;
3414 *entp = ent->next;
3415 break;
3416 }
3417 if (dent == NULL)
3418 entp = &ent->next;
3419 }
3420 *entp = edir->elf.got.glist;
3421 }
3422
3423 edir->elf.got.glist = eind->elf.got.glist;
3424 eind->elf.got.glist = NULL;
3425 }
3426
3427 /* And plt entries. */
3428 if (eind->elf.plt.plist != NULL)
3429 {
3430 if (edir->elf.plt.plist != NULL)
3431 {
3432 struct plt_entry **entp;
3433 struct plt_entry *ent;
3434
3435 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3436 {
3437 struct plt_entry *dent;
3438
3439 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3440 if (dent->addend == ent->addend)
3441 {
3442 dent->plt.refcount += ent->plt.refcount;
3443 *entp = ent->next;
3444 break;
3445 }
3446 if (dent == NULL)
3447 entp = &ent->next;
3448 }
3449 *entp = edir->elf.plt.plist;
3450 }
3451
3452 edir->elf.plt.plist = eind->elf.plt.plist;
3453 eind->elf.plt.plist = NULL;
3454 }
3455
3456 if (edir->elf.dynindx == -1)
3457 {
3458 edir->elf.dynindx = eind->elf.dynindx;
3459 edir->elf.dynstr_index = eind->elf.dynstr_index;
3460 eind->elf.dynindx = -1;
3461 eind->elf.dynstr_index = 0;
3462 }
3463 else
3464 BFD_ASSERT (eind->elf.dynindx == -1);
3465 }
3466
3467 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3468 symbols undefined on the command-line. */
3469
3470 bfd_boolean
3471 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3472 {
3473 struct ppc_link_hash_table *htab;
3474 struct bfd_sym_chain *sym;
3475
3476 htab = ppc_hash_table (info);
3477 for (sym = info->gc_sym_list; sym; sym = sym->next)
3478 {
3479 struct elf_link_hash_entry *h;
3480
3481 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3482 if (h != NULL)
3483 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3484 }
3485 return TRUE;
3486 }
3487
3488 /* Hack symbols defined in .opd sections to be function type. */
3489
3490 static bfd_boolean
3491 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3492 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3493 Elf_Internal_Sym *isym,
3494 const char **name ATTRIBUTE_UNUSED,
3495 flagword *flags ATTRIBUTE_UNUSED,
3496 asection **sec,
3497 bfd_vma *value ATTRIBUTE_UNUSED)
3498 {
3499 if (strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3500 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3501 return TRUE;
3502 }
3503
3504 static bfd_boolean
3505 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3506 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3507 {
3508 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3509 char *local_got_tls_masks;
3510
3511 if (local_got_ents == NULL)
3512 {
3513 bfd_size_type size = symtab_hdr->sh_info;
3514
3515 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3516 local_got_ents = bfd_zalloc (abfd, size);
3517 if (local_got_ents == NULL)
3518 return FALSE;
3519 elf_local_got_ents (abfd) = local_got_ents;
3520 }
3521
3522 if ((tls_type & TLS_EXPLICIT) == 0)
3523 {
3524 struct got_entry *ent;
3525
3526 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3527 if (ent->addend == r_addend
3528 && ent->owner == abfd
3529 && ent->tls_type == tls_type)
3530 break;
3531 if (ent == NULL)
3532 {
3533 bfd_size_type amt = sizeof (*ent);
3534 ent = bfd_alloc (abfd, amt);
3535 if (ent == NULL)
3536 return FALSE;
3537 ent->next = local_got_ents[r_symndx];
3538 ent->addend = r_addend;
3539 ent->owner = abfd;
3540 ent->tls_type = tls_type;
3541 ent->got.refcount = 0;
3542 local_got_ents[r_symndx] = ent;
3543 }
3544 ent->got.refcount += 1;
3545 }
3546
3547 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3548 local_got_tls_masks[r_symndx] |= tls_type;
3549 return TRUE;
3550 }
3551
3552 static bfd_boolean
3553 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3554 {
3555 struct plt_entry *ent;
3556
3557 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3558 if (ent->addend == addend)
3559 break;
3560 if (ent == NULL)
3561 {
3562 bfd_size_type amt = sizeof (*ent);
3563 ent = bfd_alloc (abfd, amt);
3564 if (ent == NULL)
3565 return FALSE;
3566 ent->next = eh->elf.plt.plist;
3567 ent->addend = addend;
3568 ent->plt.refcount = 0;
3569 eh->elf.plt.plist = ent;
3570 }
3571 ent->plt.refcount += 1;
3572 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3573 eh->is_func = 1;
3574 return TRUE;
3575 }
3576
3577 /* Find the function descriptor hash entry from the given function code
3578 hash entry FH. Link the entries via their OH fields. */
3579 static struct ppc_link_hash_entry *
3580 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3581 {
3582 struct ppc_link_hash_entry *fdh = fh->oh;
3583
3584 if (fdh == NULL)
3585 {
3586 const char *fd_name = fh->elf.root.root.string + 1;
3587
3588 fdh = (struct ppc_link_hash_entry *)
3589 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3590 if (fdh != NULL)
3591 {
3592 fdh->is_func_descriptor = 1;
3593 fdh->oh = fh;
3594 fh->is_func = 1;
3595 fh->oh = fdh;
3596 }
3597 }
3598
3599 return fdh;
3600 }
3601
3602 /* Look through the relocs for a section during the first phase, and
3603 calculate needed space in the global offset table, procedure
3604 linkage table, and dynamic reloc sections. */
3605
3606 static bfd_boolean
3607 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3608 asection *sec, const Elf_Internal_Rela *relocs)
3609 {
3610 struct ppc_link_hash_table *htab;
3611 Elf_Internal_Shdr *symtab_hdr;
3612 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3613 const Elf_Internal_Rela *rel;
3614 const Elf_Internal_Rela *rel_end;
3615 asection *sreloc;
3616 asection **opd_sym_map;
3617
3618 if (info->relocatable)
3619 return TRUE;
3620
3621 /* Don't do anything special with non-loaded, non-alloced sections.
3622 In particular, any relocs in such sections should not affect GOT
3623 and PLT reference counting (ie. we don't allow them to create GOT
3624 or PLT entries), there's no possibility or desire to optimize TLS
3625 relocs, and there's not much point in propagating relocs to shared
3626 libs that the dynamic linker won't relocate. */
3627 if ((sec->flags & SEC_ALLOC) == 0)
3628 return TRUE;
3629
3630 htab = ppc_hash_table (info);
3631 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3632
3633 sym_hashes = elf_sym_hashes (abfd);
3634 sym_hashes_end = (sym_hashes
3635 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3636 - symtab_hdr->sh_info);
3637
3638 sreloc = NULL;
3639 opd_sym_map = NULL;
3640 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3641 {
3642 /* Garbage collection needs some extra help with .opd sections.
3643 We don't want to necessarily keep everything referenced by
3644 relocs in .opd, as that would keep all functions. Instead,
3645 if we reference an .opd symbol (a function descriptor), we
3646 want to keep the function code symbol's section. This is
3647 easy for global symbols, but for local syms we need to keep
3648 information about the associated function section. Later, if
3649 edit_opd deletes entries, we'll use this array to adjust
3650 local syms in .opd. */
3651 union opd_info {
3652 asection *func_section;
3653 long entry_adjust;
3654 };
3655 bfd_size_type amt;
3656
3657 amt = sec->size * sizeof (union opd_info) / 24;
3658 opd_sym_map = bfd_zalloc (abfd, amt);
3659 if (opd_sym_map == NULL)
3660 return FALSE;
3661 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3662 }
3663
3664 if (htab->sfpr == NULL
3665 && !create_linkage_sections (htab->elf.dynobj, info))
3666 return FALSE;
3667
3668 rel_end = relocs + sec->reloc_count;
3669 for (rel = relocs; rel < rel_end; rel++)
3670 {
3671 unsigned long r_symndx;
3672 struct elf_link_hash_entry *h;
3673 enum elf_ppc64_reloc_type r_type;
3674 int tls_type = 0;
3675
3676 r_symndx = ELF64_R_SYM (rel->r_info);
3677 if (r_symndx < symtab_hdr->sh_info)
3678 h = NULL;
3679 else
3680 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3681
3682 r_type = ELF64_R_TYPE (rel->r_info);
3683 switch (r_type)
3684 {
3685 case R_PPC64_GOT_TLSLD16:
3686 case R_PPC64_GOT_TLSLD16_LO:
3687 case R_PPC64_GOT_TLSLD16_HI:
3688 case R_PPC64_GOT_TLSLD16_HA:
3689 ppc64_tlsld_got (abfd)->refcount += 1;
3690 tls_type = TLS_TLS | TLS_LD;
3691 goto dogottls;
3692
3693 case R_PPC64_GOT_TLSGD16:
3694 case R_PPC64_GOT_TLSGD16_LO:
3695 case R_PPC64_GOT_TLSGD16_HI:
3696 case R_PPC64_GOT_TLSGD16_HA:
3697 tls_type = TLS_TLS | TLS_GD;
3698 goto dogottls;
3699
3700 case R_PPC64_GOT_TPREL16_DS:
3701 case R_PPC64_GOT_TPREL16_LO_DS:
3702 case R_PPC64_GOT_TPREL16_HI:
3703 case R_PPC64_GOT_TPREL16_HA:
3704 if (info->shared)
3705 info->flags |= DF_STATIC_TLS;
3706 tls_type = TLS_TLS | TLS_TPREL;
3707 goto dogottls;
3708
3709 case R_PPC64_GOT_DTPREL16_DS:
3710 case R_PPC64_GOT_DTPREL16_LO_DS:
3711 case R_PPC64_GOT_DTPREL16_HI:
3712 case R_PPC64_GOT_DTPREL16_HA:
3713 tls_type = TLS_TLS | TLS_DTPREL;
3714 dogottls:
3715 sec->has_tls_reloc = 1;
3716 /* Fall thru */
3717
3718 case R_PPC64_GOT16:
3719 case R_PPC64_GOT16_DS:
3720 case R_PPC64_GOT16_HA:
3721 case R_PPC64_GOT16_HI:
3722 case R_PPC64_GOT16_LO:
3723 case R_PPC64_GOT16_LO_DS:
3724 /* This symbol requires a global offset table entry. */
3725 sec->has_gp_reloc = 1;
3726 if (ppc64_elf_tdata (abfd)->got == NULL
3727 && !create_got_section (abfd, info))
3728 return FALSE;
3729
3730 if (h != NULL)
3731 {
3732 struct ppc_link_hash_entry *eh;
3733 struct got_entry *ent;
3734
3735 eh = (struct ppc_link_hash_entry *) h;
3736 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3737 if (ent->addend == rel->r_addend
3738 && ent->owner == abfd
3739 && ent->tls_type == tls_type)
3740 break;
3741 if (ent == NULL)
3742 {
3743 bfd_size_type amt = sizeof (*ent);
3744 ent = bfd_alloc (abfd, amt);
3745 if (ent == NULL)
3746 return FALSE;
3747 ent->next = eh->elf.got.glist;
3748 ent->addend = rel->r_addend;
3749 ent->owner = abfd;
3750 ent->tls_type = tls_type;
3751 ent->got.refcount = 0;
3752 eh->elf.got.glist = ent;
3753 }
3754 ent->got.refcount += 1;
3755 eh->tls_mask |= tls_type;
3756 }
3757 else
3758 /* This is a global offset table entry for a local symbol. */
3759 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3760 rel->r_addend, tls_type))
3761 return FALSE;
3762 break;
3763
3764 case R_PPC64_PLT16_HA:
3765 case R_PPC64_PLT16_HI:
3766 case R_PPC64_PLT16_LO:
3767 case R_PPC64_PLT32:
3768 case R_PPC64_PLT64:
3769 /* This symbol requires a procedure linkage table entry. We
3770 actually build the entry in adjust_dynamic_symbol,
3771 because this might be a case of linking PIC code without
3772 linking in any dynamic objects, in which case we don't
3773 need to generate a procedure linkage table after all. */
3774 if (h == NULL)
3775 {
3776 /* It does not make sense to have a procedure linkage
3777 table entry for a local symbol. */
3778 bfd_set_error (bfd_error_bad_value);
3779 return FALSE;
3780 }
3781 else
3782 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3783 rel->r_addend))
3784 return FALSE;
3785 break;
3786
3787 /* The following relocations don't need to propagate the
3788 relocation if linking a shared object since they are
3789 section relative. */
3790 case R_PPC64_SECTOFF:
3791 case R_PPC64_SECTOFF_LO:
3792 case R_PPC64_SECTOFF_HI:
3793 case R_PPC64_SECTOFF_HA:
3794 case R_PPC64_SECTOFF_DS:
3795 case R_PPC64_SECTOFF_LO_DS:
3796 case R_PPC64_DTPREL16:
3797 case R_PPC64_DTPREL16_LO:
3798 case R_PPC64_DTPREL16_HI:
3799 case R_PPC64_DTPREL16_HA:
3800 case R_PPC64_DTPREL16_DS:
3801 case R_PPC64_DTPREL16_LO_DS:
3802 case R_PPC64_DTPREL16_HIGHER:
3803 case R_PPC64_DTPREL16_HIGHERA:
3804 case R_PPC64_DTPREL16_HIGHEST:
3805 case R_PPC64_DTPREL16_HIGHESTA:
3806 break;
3807
3808 /* Nor do these. */
3809 case R_PPC64_TOC16:
3810 case R_PPC64_TOC16_LO:
3811 case R_PPC64_TOC16_HI:
3812 case R_PPC64_TOC16_HA:
3813 case R_PPC64_TOC16_DS:
3814 case R_PPC64_TOC16_LO_DS:
3815 sec->has_gp_reloc = 1;
3816 break;
3817
3818 /* This relocation describes the C++ object vtable hierarchy.
3819 Reconstruct it for later use during GC. */
3820 case R_PPC64_GNU_VTINHERIT:
3821 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3822 return FALSE;
3823 break;
3824
3825 /* This relocation describes which C++ vtable entries are actually
3826 used. Record for later use during GC. */
3827 case R_PPC64_GNU_VTENTRY:
3828 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3829 return FALSE;
3830 break;
3831
3832 case R_PPC64_REL14:
3833 case R_PPC64_REL14_BRTAKEN:
3834 case R_PPC64_REL14_BRNTAKEN:
3835 htab->has_14bit_branch = 1;
3836 /* Fall through. */
3837
3838 case R_PPC64_REL24:
3839 if (h != NULL
3840 && h->root.root.string[0] == '.'
3841 && h->root.root.string[1] != 0)
3842 {
3843 /* We may need a .plt entry if the function this reloc
3844 refers to is in a shared lib. */
3845 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3846 rel->r_addend))
3847 return FALSE;
3848 if (h == htab->tls_get_addr)
3849 sec->has_tls_reloc = 1;
3850 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3851 == 0)
3852 && (h->root.root.string[15] == 0
3853 || h->root.root.string[15] == '@'))
3854 {
3855 htab->tls_get_addr = h;
3856 sec->has_tls_reloc = 1;
3857 }
3858 }
3859 break;
3860
3861 case R_PPC64_TPREL64:
3862 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3863 if (info->shared)
3864 info->flags |= DF_STATIC_TLS;
3865 goto dotlstoc;
3866
3867 case R_PPC64_DTPMOD64:
3868 if (rel + 1 < rel_end
3869 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3870 && rel[1].r_offset == rel->r_offset + 8)
3871 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3872 else
3873 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3874 goto dotlstoc;
3875
3876 case R_PPC64_DTPREL64:
3877 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3878 if (rel != relocs
3879 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3880 && rel[-1].r_offset == rel->r_offset - 8)
3881 /* This is the second reloc of a dtpmod, dtprel pair.
3882 Don't mark with TLS_DTPREL. */
3883 goto dodyn;
3884
3885 dotlstoc:
3886 sec->has_tls_reloc = 1;
3887 if (h != NULL)
3888 {
3889 struct ppc_link_hash_entry *eh;
3890 eh = (struct ppc_link_hash_entry *) h;
3891 eh->tls_mask |= tls_type;
3892 }
3893 else
3894 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3895 rel->r_addend, tls_type))
3896 return FALSE;
3897
3898 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3899 {
3900 /* One extra to simplify get_tls_mask. */
3901 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
3902 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3903 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3904 return FALSE;
3905 }
3906 BFD_ASSERT (rel->r_offset % 8 == 0);
3907 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3908
3909 /* Mark the second slot of a GD or LD entry.
3910 -1 to indicate GD and -2 to indicate LD. */
3911 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3912 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3913 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3914 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3915 goto dodyn;
3916
3917 case R_PPC64_TPREL16:
3918 case R_PPC64_TPREL16_LO:
3919 case R_PPC64_TPREL16_HI:
3920 case R_PPC64_TPREL16_HA:
3921 case R_PPC64_TPREL16_DS:
3922 case R_PPC64_TPREL16_LO_DS:
3923 case R_PPC64_TPREL16_HIGHER:
3924 case R_PPC64_TPREL16_HIGHERA:
3925 case R_PPC64_TPREL16_HIGHEST:
3926 case R_PPC64_TPREL16_HIGHESTA:
3927 if (info->shared)
3928 {
3929 info->flags |= DF_STATIC_TLS;
3930 goto dodyn;
3931 }
3932 break;
3933
3934 case R_PPC64_ADDR64:
3935 if (opd_sym_map != NULL
3936 && h != NULL
3937 && h->root.root.string[0] == '.'
3938 && h->root.root.string[1] != 0)
3939 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3940
3941 if (opd_sym_map != NULL
3942 && h == NULL
3943 && rel + 1 < rel_end
3944 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3945 {
3946 asection *s;
3947
3948 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3949 r_symndx);
3950 if (s == NULL)
3951 return FALSE;
3952 else if (s != sec)
3953 opd_sym_map[rel->r_offset / 24] = s;
3954 }
3955 /* Fall through. */
3956
3957 case R_PPC64_REL30:
3958 case R_PPC64_REL32:
3959 case R_PPC64_REL64:
3960 case R_PPC64_ADDR14:
3961 case R_PPC64_ADDR14_BRNTAKEN:
3962 case R_PPC64_ADDR14_BRTAKEN:
3963 case R_PPC64_ADDR16:
3964 case R_PPC64_ADDR16_DS:
3965 case R_PPC64_ADDR16_HA:
3966 case R_PPC64_ADDR16_HI:
3967 case R_PPC64_ADDR16_HIGHER:
3968 case R_PPC64_ADDR16_HIGHERA:
3969 case R_PPC64_ADDR16_HIGHEST:
3970 case R_PPC64_ADDR16_HIGHESTA:
3971 case R_PPC64_ADDR16_LO:
3972 case R_PPC64_ADDR16_LO_DS:
3973 case R_PPC64_ADDR24:
3974 case R_PPC64_ADDR32:
3975 case R_PPC64_UADDR16:
3976 case R_PPC64_UADDR32:
3977 case R_PPC64_UADDR64:
3978 case R_PPC64_TOC:
3979 if (h != NULL && !info->shared)
3980 /* We may need a copy reloc. */
3981 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3982
3983 /* Don't propagate .opd relocs. */
3984 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3985 break;
3986
3987 /* If we are creating a shared library, and this is a reloc
3988 against a global symbol, or a non PC relative reloc
3989 against a local symbol, then we need to copy the reloc
3990 into the shared library. However, if we are linking with
3991 -Bsymbolic, we do not need to copy a reloc against a
3992 global symbol which is defined in an object we are
3993 including in the link (i.e., DEF_REGULAR is set). At
3994 this point we have not seen all the input files, so it is
3995 possible that DEF_REGULAR is not set now but will be set
3996 later (it is never cleared). In case of a weak definition,
3997 DEF_REGULAR may be cleared later by a strong definition in
3998 a shared library. We account for that possibility below by
3999 storing information in the dyn_relocs field of the hash
4000 table entry. A similar situation occurs when creating
4001 shared libraries and symbol visibility changes render the
4002 symbol local.
4003
4004 If on the other hand, we are creating an executable, we
4005 may need to keep relocations for symbols satisfied by a
4006 dynamic library if we manage to avoid copy relocs for the
4007 symbol. */
4008 dodyn:
4009 if ((info->shared
4010 && (MUST_BE_DYN_RELOC (r_type)
4011 || (h != NULL
4012 && (! info->symbolic
4013 || h->root.type == bfd_link_hash_defweak
4014 || (h->elf_link_hash_flags
4015 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4016 || (ELIMINATE_COPY_RELOCS
4017 && !info->shared
4018 && h != NULL
4019 && (h->root.type == bfd_link_hash_defweak
4020 || (h->elf_link_hash_flags
4021 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
4022 {
4023 struct ppc_dyn_relocs *p;
4024 struct ppc_dyn_relocs **head;
4025
4026 /* We must copy these reloc types into the output file.
4027 Create a reloc section in dynobj and make room for
4028 this reloc. */
4029 if (sreloc == NULL)
4030 {
4031 const char *name;
4032 bfd *dynobj;
4033
4034 name = (bfd_elf_string_from_elf_section
4035 (abfd,
4036 elf_elfheader (abfd)->e_shstrndx,
4037 elf_section_data (sec)->rel_hdr.sh_name));
4038 if (name == NULL)
4039 return FALSE;
4040
4041 if (strncmp (name, ".rela", 5) != 0
4042 || strcmp (bfd_get_section_name (abfd, sec),
4043 name + 5) != 0)
4044 {
4045 (*_bfd_error_handler)
4046 (_("%s: bad relocation section name `%s\'"),
4047 bfd_archive_filename (abfd), name);
4048 bfd_set_error (bfd_error_bad_value);
4049 }
4050
4051 dynobj = htab->elf.dynobj;
4052 sreloc = bfd_get_section_by_name (dynobj, name);
4053 if (sreloc == NULL)
4054 {
4055 flagword flags;
4056
4057 sreloc = bfd_make_section (dynobj, name);
4058 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4059 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4060 if ((sec->flags & SEC_ALLOC) != 0)
4061 flags |= SEC_ALLOC | SEC_LOAD;
4062 if (sreloc == NULL
4063 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4064 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4065 return FALSE;
4066 }
4067 elf_section_data (sec)->sreloc = sreloc;
4068 }
4069
4070 /* If this is a global symbol, we count the number of
4071 relocations we need for this symbol. */
4072 if (h != NULL)
4073 {
4074 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4075 }
4076 else
4077 {
4078 /* Track dynamic relocs needed for local syms too.
4079 We really need local syms available to do this
4080 easily. Oh well. */
4081
4082 asection *s;
4083 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4084 sec, r_symndx);
4085 if (s == NULL)
4086 return FALSE;
4087
4088 head = ((struct ppc_dyn_relocs **)
4089 &elf_section_data (s)->local_dynrel);
4090 }
4091
4092 p = *head;
4093 if (p == NULL || p->sec != sec)
4094 {
4095 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4096 if (p == NULL)
4097 return FALSE;
4098 p->next = *head;
4099 *head = p;
4100 p->sec = sec;
4101 p->count = 0;
4102 p->pc_count = 0;
4103 }
4104
4105 p->count += 1;
4106 if (!MUST_BE_DYN_RELOC (r_type))
4107 p->pc_count += 1;
4108 }
4109 break;
4110
4111 default:
4112 break;
4113 }
4114 }
4115
4116 return TRUE;
4117 }
4118
4119 /* Return the section that should be marked against GC for a given
4120 relocation. */
4121
4122 static asection *
4123 ppc64_elf_gc_mark_hook (asection *sec,
4124 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4125 Elf_Internal_Rela *rel,
4126 struct elf_link_hash_entry *h,
4127 Elf_Internal_Sym *sym)
4128 {
4129 asection *rsec = NULL;
4130
4131 if (h != NULL)
4132 {
4133 enum elf_ppc64_reloc_type r_type;
4134 struct ppc_link_hash_entry *fdh;
4135
4136 r_type = ELF64_R_TYPE (rel->r_info);
4137 switch (r_type)
4138 {
4139 case R_PPC64_GNU_VTINHERIT:
4140 case R_PPC64_GNU_VTENTRY:
4141 break;
4142
4143 default:
4144 switch (h->root.type)
4145 {
4146 case bfd_link_hash_defined:
4147 case bfd_link_hash_defweak:
4148 fdh = (struct ppc_link_hash_entry *) h;
4149
4150 /* Function descriptor syms cause the associated
4151 function code sym section to be marked. */
4152 if (fdh->is_func_descriptor)
4153 rsec = fdh->oh->elf.root.u.def.section;
4154
4155 /* Function entry syms return NULL if they are in .opd
4156 and are not ._start (or others undefined on the ld
4157 command line). Thus we avoid marking all function
4158 sections, as all functions are referenced in .opd. */
4159 else if ((fdh->oh != NULL && fdh->oh->is_entry)
4160 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4161 rsec = h->root.u.def.section;
4162 break;
4163
4164 case bfd_link_hash_common:
4165 rsec = h->root.u.c.p->section;
4166 break;
4167
4168 default:
4169 break;
4170 }
4171 }
4172 }
4173 else
4174 {
4175 asection **opd_sym_section;
4176
4177 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4178 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4179 if (opd_sym_section != NULL)
4180 rsec = opd_sym_section[sym->st_value / 24];
4181 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4182 rsec = NULL;
4183 }
4184
4185 return rsec;
4186 }
4187
4188 /* Update the .got, .plt. and dynamic reloc reference counts for the
4189 section being removed. */
4190
4191 static bfd_boolean
4192 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4193 asection *sec, const Elf_Internal_Rela *relocs)
4194 {
4195 struct ppc_link_hash_table *htab;
4196 Elf_Internal_Shdr *symtab_hdr;
4197 struct elf_link_hash_entry **sym_hashes;
4198 struct got_entry **local_got_ents;
4199 const Elf_Internal_Rela *rel, *relend;
4200
4201 if ((sec->flags & SEC_ALLOC) == 0)
4202 return TRUE;
4203
4204 elf_section_data (sec)->local_dynrel = NULL;
4205
4206 htab = ppc_hash_table (info);
4207 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4208 sym_hashes = elf_sym_hashes (abfd);
4209 local_got_ents = elf_local_got_ents (abfd);
4210
4211 relend = relocs + sec->reloc_count;
4212 for (rel = relocs; rel < relend; rel++)
4213 {
4214 unsigned long r_symndx;
4215 enum elf_ppc64_reloc_type r_type;
4216 struct elf_link_hash_entry *h = NULL;
4217 char tls_type = 0;
4218
4219 r_symndx = ELF64_R_SYM (rel->r_info);
4220 r_type = ELF64_R_TYPE (rel->r_info);
4221 if (r_symndx >= symtab_hdr->sh_info)
4222 {
4223 struct ppc_link_hash_entry *eh;
4224 struct ppc_dyn_relocs **pp;
4225 struct ppc_dyn_relocs *p;
4226
4227 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4228 eh = (struct ppc_link_hash_entry *) h;
4229
4230 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4231 if (p->sec == sec)
4232 {
4233 /* Everything must go for SEC. */
4234 *pp = p->next;
4235 break;
4236 }
4237 }
4238
4239 switch (r_type)
4240 {
4241 case R_PPC64_GOT_TLSLD16:
4242 case R_PPC64_GOT_TLSLD16_LO:
4243 case R_PPC64_GOT_TLSLD16_HI:
4244 case R_PPC64_GOT_TLSLD16_HA:
4245 ppc64_tlsld_got (abfd)->refcount -= 1;
4246 tls_type = TLS_TLS | TLS_LD;
4247 goto dogot;
4248
4249 case R_PPC64_GOT_TLSGD16:
4250 case R_PPC64_GOT_TLSGD16_LO:
4251 case R_PPC64_GOT_TLSGD16_HI:
4252 case R_PPC64_GOT_TLSGD16_HA:
4253 tls_type = TLS_TLS | TLS_GD;
4254 goto dogot;
4255
4256 case R_PPC64_GOT_TPREL16_DS:
4257 case R_PPC64_GOT_TPREL16_LO_DS:
4258 case R_PPC64_GOT_TPREL16_HI:
4259 case R_PPC64_GOT_TPREL16_HA:
4260 tls_type = TLS_TLS | TLS_TPREL;
4261 goto dogot;
4262
4263 case R_PPC64_GOT_DTPREL16_DS:
4264 case R_PPC64_GOT_DTPREL16_LO_DS:
4265 case R_PPC64_GOT_DTPREL16_HI:
4266 case R_PPC64_GOT_DTPREL16_HA:
4267 tls_type = TLS_TLS | TLS_DTPREL;
4268 goto dogot;
4269
4270 case R_PPC64_GOT16:
4271 case R_PPC64_GOT16_DS:
4272 case R_PPC64_GOT16_HA:
4273 case R_PPC64_GOT16_HI:
4274 case R_PPC64_GOT16_LO:
4275 case R_PPC64_GOT16_LO_DS:
4276 dogot:
4277 {
4278 struct got_entry *ent;
4279
4280 if (h != NULL)
4281 ent = h->got.glist;
4282 else
4283 ent = local_got_ents[r_symndx];
4284
4285 for (; ent != NULL; ent = ent->next)
4286 if (ent->addend == rel->r_addend
4287 && ent->owner == abfd
4288 && ent->tls_type == tls_type)
4289 break;
4290 if (ent == NULL)
4291 abort ();
4292 if (ent->got.refcount > 0)
4293 ent->got.refcount -= 1;
4294 }
4295 break;
4296
4297 case R_PPC64_PLT16_HA:
4298 case R_PPC64_PLT16_HI:
4299 case R_PPC64_PLT16_LO:
4300 case R_PPC64_PLT32:
4301 case R_PPC64_PLT64:
4302 case R_PPC64_REL14:
4303 case R_PPC64_REL14_BRNTAKEN:
4304 case R_PPC64_REL14_BRTAKEN:
4305 case R_PPC64_REL24:
4306 if (h != NULL)
4307 {
4308 struct plt_entry *ent;
4309
4310 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4311 if (ent->addend == rel->r_addend)
4312 break;
4313 if (ent == NULL)
4314 abort ();
4315 if (ent->plt.refcount > 0)
4316 ent->plt.refcount -= 1;
4317 }
4318 break;
4319
4320 default:
4321 break;
4322 }
4323 }
4324 return TRUE;
4325 }
4326
4327 /* Called via elf_link_hash_traverse to transfer dynamic linking
4328 information on function code symbol entries to their corresponding
4329 function descriptor symbol entries. */
4330 static bfd_boolean
4331 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4332 {
4333 struct bfd_link_info *info;
4334 struct ppc_link_hash_table *htab;
4335 struct plt_entry *ent;
4336 struct ppc_link_hash_entry *fh;
4337 struct ppc_link_hash_entry *fdh;
4338 bfd_boolean force_local;
4339
4340 fh = (struct ppc_link_hash_entry *) h;
4341 if (fh->elf.root.type == bfd_link_hash_indirect)
4342 return TRUE;
4343
4344 if (fh->elf.root.type == bfd_link_hash_warning)
4345 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4346
4347 info = inf;
4348 htab = ppc_hash_table (info);
4349
4350 /* If this is a function code symbol, transfer dynamic linking
4351 information to the function descriptor symbol. */
4352 if (!fh->is_func)
4353 return TRUE;
4354
4355 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4356 if (ent->plt.refcount > 0)
4357 break;
4358 if (ent == NULL
4359 || fh->elf.root.root.string[0] != '.'
4360 || fh->elf.root.root.string[1] == '\0')
4361 return TRUE;
4362
4363 /* Find the corresponding function descriptor symbol. Create it
4364 as undefined if necessary. */
4365
4366 fdh = get_fdh (fh, htab);
4367 if (fdh != NULL)
4368 while (fdh->elf.root.type == bfd_link_hash_indirect
4369 || fdh->elf.root.type == bfd_link_hash_warning)
4370 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4371
4372 if (fdh == NULL
4373 && info->shared
4374 && (fh->elf.root.type == bfd_link_hash_undefined
4375 || fh->elf.root.type == bfd_link_hash_undefweak))
4376 {
4377 bfd *abfd;
4378 asymbol *newsym;
4379 struct bfd_link_hash_entry *bh;
4380
4381 abfd = fh->elf.root.u.undef.abfd;
4382 newsym = bfd_make_empty_symbol (abfd);
4383 newsym->name = fh->elf.root.root.string + 1;
4384 newsym->section = bfd_und_section_ptr;
4385 newsym->value = 0;
4386 newsym->flags = BSF_OBJECT;
4387 if (fh->elf.root.type == bfd_link_hash_undefweak)
4388 newsym->flags |= BSF_WEAK;
4389
4390 bh = &fdh->elf.root;
4391 if ( !(_bfd_generic_link_add_one_symbol
4392 (info, abfd, newsym->name, newsym->flags,
4393 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4394 {
4395 return FALSE;
4396 }
4397 fdh = (struct ppc_link_hash_entry *) bh;
4398 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4399 fdh->elf.size = 24;
4400 fdh->elf.type = STT_OBJECT;
4401 }
4402
4403 if (fdh != NULL
4404 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4405 && (info->shared
4406 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4407 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4408 || (fdh->elf.root.type == bfd_link_hash_undefweak
4409 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4410 {
4411 if (fdh->elf.dynindx == -1)
4412 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
4413 return FALSE;
4414 fdh->elf.elf_link_hash_flags
4415 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4416 | ELF_LINK_HASH_REF_DYNAMIC
4417 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4418 | ELF_LINK_NON_GOT_REF));
4419 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4420 {
4421 fdh->elf.plt.plist = fh->elf.plt.plist;
4422 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4423 }
4424 fdh->is_func_descriptor = 1;
4425 fdh->oh = fh;
4426 fh->oh = fdh;
4427 }
4428
4429 /* Now that the info is on the function descriptor, clear the
4430 function code sym info. Any function code syms for which we
4431 don't have a definition in a regular file, we force local.
4432 This prevents a shared library from exporting syms that have
4433 been imported from another library. Function code syms that
4434 are really in the library we must leave global to prevent the
4435 linker dragging in a definition from a static library. */
4436 force_local
4437 = (info->shared
4438 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4439 || fdh == NULL
4440 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4441 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4442 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4443
4444 return TRUE;
4445 }
4446
4447 #define MIN_SAVE_FPR 14
4448 #define MAX_SAVE_FPR 31
4449
4450 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4451 this hook to a) provide some gcc support functions, and b) transfer
4452 dynamic linking information gathered so far on function code symbol
4453 entries, to their corresponding function descriptor symbol entries. */
4454 static bfd_boolean
4455 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4456 struct bfd_link_info *info)
4457 {
4458 struct ppc_link_hash_table *htab;
4459 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4460 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4461 unsigned int i;
4462 struct elf_link_hash_entry *h;
4463 bfd_byte *p;
4464 char sym[10];
4465
4466 htab = ppc_hash_table (info);
4467
4468 if (htab->sfpr == NULL)
4469 /* We don't have any relocs. */
4470 return TRUE;
4471
4472 /* First provide any missing ._savef* and ._restf* functions. */
4473 memcpy (sym, "._savef14", 10);
4474 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4475 {
4476 sym[7] = i / 10 + '0';
4477 sym[8] = i % 10 + '0';
4478 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4479 if (h != NULL
4480 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4481 {
4482 if (lowest_savef > i)
4483 lowest_savef = i;
4484 h->root.type = bfd_link_hash_defined;
4485 h->root.u.def.section = htab->sfpr;
4486 h->root.u.def.value = (i - lowest_savef) * 4;
4487 h->type = STT_FUNC;
4488 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4489 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4490 }
4491 }
4492
4493 memcpy (sym, "._restf14", 10);
4494 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4495 {
4496 sym[7] = i / 10 + '0';
4497 sym[8] = i % 10 + '0';
4498 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4499 if (h != NULL
4500 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4501 {
4502 if (lowest_restf > i)
4503 lowest_restf = i;
4504 h->root.type = bfd_link_hash_defined;
4505 h->root.u.def.section = htab->sfpr;
4506 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4507 + (i - lowest_restf) * 4);
4508 h->type = STT_FUNC;
4509 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4510 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4511 }
4512 }
4513
4514 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4515
4516 htab->sfpr->size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4517 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4518
4519 if (htab->sfpr->size == 0)
4520 {
4521 _bfd_strip_section_from_output (info, htab->sfpr);
4522 return TRUE;
4523 }
4524
4525 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->size);
4526 if (p == NULL)
4527 return FALSE;
4528 htab->sfpr->contents = p;
4529
4530 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4531 {
4532 unsigned int fpr = i << 21;
4533 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4534 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4535 p += 4;
4536 }
4537 if (lowest_savef <= MAX_SAVE_FPR)
4538 {
4539 bfd_put_32 (htab->elf.dynobj, BLR, p);
4540 p += 4;
4541 }
4542
4543 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4544 {
4545 unsigned int fpr = i << 21;
4546 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4547 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4548 p += 4;
4549 }
4550 if (lowest_restf <= MAX_SAVE_FPR)
4551 bfd_put_32 (htab->elf.dynobj, BLR, p);
4552
4553 return TRUE;
4554 }
4555
4556 /* Adjust a symbol defined by a dynamic object and referenced by a
4557 regular object. The current definition is in some section of the
4558 dynamic object, but we're not including those sections. We have to
4559 change the definition to something the rest of the link can
4560 understand. */
4561
4562 static bfd_boolean
4563 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4564 struct elf_link_hash_entry *h)
4565 {
4566 struct ppc_link_hash_table *htab;
4567 asection *s;
4568 unsigned int power_of_two;
4569
4570 htab = ppc_hash_table (info);
4571
4572 /* Deal with function syms. */
4573 if (h->type == STT_FUNC
4574 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4575 {
4576 /* Clear procedure linkage table information for any symbol that
4577 won't need a .plt entry. */
4578 struct plt_entry *ent;
4579 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4580 if (ent->plt.refcount > 0)
4581 break;
4582 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4583 || ent == NULL
4584 || SYMBOL_CALLS_LOCAL (info, h)
4585 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4586 && h->root.type == bfd_link_hash_undefweak))
4587 {
4588 h->plt.plist = NULL;
4589 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4590 }
4591 }
4592 else
4593 h->plt.plist = NULL;
4594
4595 /* If this is a weak symbol, and there is a real definition, the
4596 processor independent code will have arranged for us to see the
4597 real definition first, and we can just use the same value. */
4598 if (h->weakdef != NULL)
4599 {
4600 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4601 || h->weakdef->root.type == bfd_link_hash_defweak);
4602 h->root.u.def.section = h->weakdef->root.u.def.section;
4603 h->root.u.def.value = h->weakdef->root.u.def.value;
4604 if (ELIMINATE_COPY_RELOCS)
4605 h->elf_link_hash_flags
4606 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4607 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4608 return TRUE;
4609 }
4610
4611 /* If we are creating a shared library, we must presume that the
4612 only references to the symbol are via the global offset table.
4613 For such cases we need not do anything here; the relocations will
4614 be handled correctly by relocate_section. */
4615 if (info->shared)
4616 return TRUE;
4617
4618 /* If there are no references to this symbol that do not use the
4619 GOT, we don't need to generate a copy reloc. */
4620 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4621 return TRUE;
4622
4623 if (ELIMINATE_COPY_RELOCS)
4624 {
4625 struct ppc_link_hash_entry * eh;
4626 struct ppc_dyn_relocs *p;
4627
4628 eh = (struct ppc_link_hash_entry *) h;
4629 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4630 {
4631 s = p->sec->output_section;
4632 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4633 break;
4634 }
4635
4636 /* If we didn't find any dynamic relocs in read-only sections, then
4637 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4638 if (p == NULL)
4639 {
4640 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4641 return TRUE;
4642 }
4643 }
4644
4645 if (h->plt.plist != NULL)
4646 {
4647 /* We should never get here, but unfortunately there are versions
4648 of gcc out there that improperly (for this ABI) put initialized
4649 function pointers, vtable refs and suchlike in read-only
4650 sections. Allow them to proceed, but warn that this might
4651 break at runtime. */
4652 (*_bfd_error_handler)
4653 (_("copy reloc against `%s' requires lazy plt linking; "
4654 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4655 h->root.root.string);
4656 }
4657
4658 /* This is a reference to a symbol defined by a dynamic object which
4659 is not a function. */
4660
4661 /* We must allocate the symbol in our .dynbss section, which will
4662 become part of the .bss section of the executable. There will be
4663 an entry for this symbol in the .dynsym section. The dynamic
4664 object will contain position independent code, so all references
4665 from the dynamic object to this symbol will go through the global
4666 offset table. The dynamic linker will use the .dynsym entry to
4667 determine the address it must put in the global offset table, so
4668 both the dynamic object and the regular object will refer to the
4669 same memory location for the variable. */
4670
4671 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4672 to copy the initial value out of the dynamic object and into the
4673 runtime process image. We need to remember the offset into the
4674 .rela.bss section we are going to use. */
4675 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4676 {
4677 htab->relbss->size += sizeof (Elf64_External_Rela);
4678 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4679 }
4680
4681 /* We need to figure out the alignment required for this symbol. I
4682 have no idea how ELF linkers handle this. */
4683 power_of_two = bfd_log2 (h->size);
4684 if (power_of_two > 4)
4685 power_of_two = 4;
4686
4687 /* Apply the required alignment. */
4688 s = htab->dynbss;
4689 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4690 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4691 {
4692 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4693 return FALSE;
4694 }
4695
4696 /* Define the symbol as being at this point in the section. */
4697 h->root.u.def.section = s;
4698 h->root.u.def.value = s->size;
4699
4700 /* Increment the section size to make room for the symbol. */
4701 s->size += h->size;
4702
4703 return TRUE;
4704 }
4705
4706 /* If given a function descriptor symbol, hide both the function code
4707 sym and the descriptor. */
4708 static void
4709 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4710 struct elf_link_hash_entry *h,
4711 bfd_boolean force_local)
4712 {
4713 struct ppc_link_hash_entry *eh;
4714 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4715
4716 eh = (struct ppc_link_hash_entry *) h;
4717 if (eh->is_func_descriptor)
4718 {
4719 struct ppc_link_hash_entry *fh = eh->oh;
4720
4721 if (fh == NULL)
4722 {
4723 const char *p, *q;
4724 struct ppc_link_hash_table *htab;
4725 char save;
4726
4727 /* We aren't supposed to use alloca in BFD because on
4728 systems which do not have alloca the version in libiberty
4729 calls xmalloc, which might cause the program to crash
4730 when it runs out of memory. This function doesn't have a
4731 return status, so there's no way to gracefully return an
4732 error. So cheat. We know that string[-1] can be safely
4733 accessed; It's either a string in an ELF string table,
4734 or allocated in an objalloc structure. */
4735
4736 p = eh->elf.root.root.string - 1;
4737 save = *p;
4738 *(char *) p = '.';
4739 htab = ppc_hash_table (info);
4740 fh = (struct ppc_link_hash_entry *)
4741 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4742 *(char *) p = save;
4743
4744 /* Unfortunately, if it so happens that the string we were
4745 looking for was allocated immediately before this string,
4746 then we overwrote the string terminator. That's the only
4747 reason the lookup should fail. */
4748 if (fh == NULL)
4749 {
4750 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
4751 while (q >= eh->elf.root.root.string && *q == *p)
4752 --q, --p;
4753 if (q < eh->elf.root.root.string && *p == '.')
4754 fh = (struct ppc_link_hash_entry *)
4755 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4756 }
4757 if (fh != NULL)
4758 {
4759 eh->oh = fh;
4760 fh->oh = eh;
4761 }
4762 }
4763 if (fh != NULL)
4764 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4765 }
4766 }
4767
4768 static bfd_boolean
4769 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4770 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4771 unsigned long r_symndx, bfd *ibfd)
4772 {
4773 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4774
4775 if (r_symndx >= symtab_hdr->sh_info)
4776 {
4777 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4778 struct elf_link_hash_entry *h;
4779
4780 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4781 while (h->root.type == bfd_link_hash_indirect
4782 || h->root.type == bfd_link_hash_warning)
4783 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4784
4785 if (hp != NULL)
4786 *hp = h;
4787
4788 if (symp != NULL)
4789 *symp = NULL;
4790
4791 if (symsecp != NULL)
4792 {
4793 asection *symsec = NULL;
4794 if (h->root.type == bfd_link_hash_defined
4795 || h->root.type == bfd_link_hash_defweak)
4796 symsec = h->root.u.def.section;
4797 *symsecp = symsec;
4798 }
4799
4800 if (tls_maskp != NULL)
4801 {
4802 struct ppc_link_hash_entry *eh;
4803
4804 eh = (struct ppc_link_hash_entry *) h;
4805 *tls_maskp = &eh->tls_mask;
4806 }
4807 }
4808 else
4809 {
4810 Elf_Internal_Sym *sym;
4811 Elf_Internal_Sym *locsyms = *locsymsp;
4812
4813 if (locsyms == NULL)
4814 {
4815 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4816 if (locsyms == NULL)
4817 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4818 symtab_hdr->sh_info,
4819 0, NULL, NULL, NULL);
4820 if (locsyms == NULL)
4821 return FALSE;
4822 *locsymsp = locsyms;
4823 }
4824 sym = locsyms + r_symndx;
4825
4826 if (hp != NULL)
4827 *hp = NULL;
4828
4829 if (symp != NULL)
4830 *symp = sym;
4831
4832 if (symsecp != NULL)
4833 {
4834 asection *symsec = NULL;
4835 if ((sym->st_shndx != SHN_UNDEF
4836 && sym->st_shndx < SHN_LORESERVE)
4837 || sym->st_shndx > SHN_HIRESERVE)
4838 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4839 *symsecp = symsec;
4840 }
4841
4842 if (tls_maskp != NULL)
4843 {
4844 struct got_entry **lgot_ents;
4845 char *tls_mask;
4846
4847 tls_mask = NULL;
4848 lgot_ents = elf_local_got_ents (ibfd);
4849 if (lgot_ents != NULL)
4850 {
4851 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4852 tls_mask = &lgot_masks[r_symndx];
4853 }
4854 *tls_maskp = tls_mask;
4855 }
4856 }
4857 return TRUE;
4858 }
4859
4860 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4861 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4862 type suitable for optimization, and 1 otherwise. */
4863
4864 static int
4865 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
4866 Elf_Internal_Sym **locsymsp,
4867 const Elf_Internal_Rela *rel, bfd *ibfd)
4868 {
4869 unsigned long r_symndx;
4870 int next_r;
4871 struct elf_link_hash_entry *h;
4872 Elf_Internal_Sym *sym;
4873 asection *sec;
4874 bfd_vma off;
4875
4876 r_symndx = ELF64_R_SYM (rel->r_info);
4877 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4878 return 0;
4879
4880 if ((*tls_maskp != NULL && **tls_maskp != 0)
4881 || sec == NULL
4882 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4883 return 1;
4884
4885 /* Look inside a TOC section too. */
4886 if (h != NULL)
4887 {
4888 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4889 off = h->root.u.def.value;
4890 }
4891 else
4892 off = sym->st_value;
4893 off += rel->r_addend;
4894 BFD_ASSERT (off % 8 == 0);
4895 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4896 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4897 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4898 return 0;
4899 if (toc_symndx != NULL)
4900 *toc_symndx = r_symndx;
4901 if ((h == NULL
4902 || ((h->root.type == bfd_link_hash_defined
4903 || h->root.type == bfd_link_hash_defweak)
4904 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4905 && (next_r == -1 || next_r == -2))
4906 return 1 - next_r;
4907 return 1;
4908 }
4909
4910 /* Adjust all global syms defined in opd sections. In gcc generated
4911 code these will already have been done, but I suppose we have to
4912 cater for all sorts of hand written assembly. */
4913
4914 static bfd_boolean
4915 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
4916 {
4917 struct ppc_link_hash_entry *eh;
4918 asection *sym_sec;
4919 long *opd_adjust;
4920
4921 if (h->root.type == bfd_link_hash_indirect)
4922 return TRUE;
4923
4924 if (h->root.type == bfd_link_hash_warning)
4925 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4926
4927 if (h->root.type != bfd_link_hash_defined
4928 && h->root.type != bfd_link_hash_defweak)
4929 return TRUE;
4930
4931 eh = (struct ppc_link_hash_entry *) h;
4932 if (eh->adjust_done)
4933 return TRUE;
4934
4935 sym_sec = eh->elf.root.u.def.section;
4936 opd_adjust = get_opd_info (sym_sec);
4937 if (opd_adjust != NULL)
4938 {
4939 eh->elf.root.u.def.value += opd_adjust[eh->elf.root.u.def.value / 24];
4940 long adjust = opd_adjust[eh->elf.root.u.def.value / 24];
4941 if (adjust == -1)
4942 {
4943 /* This entry has been deleted. */
4944 eh->elf.root.u.def.value = 0;
4945 eh->elf.root.u.def.section = &bfd_abs_section;
4946 }
4947 else
4948 eh->elf.root.u.def.value += adjust;
4949 eh->adjust_done = 1;
4950 }
4951 return TRUE;
4952 }
4953
4954 /* Remove unused Official Procedure Descriptor entries. Currently we
4955 only remove those associated with functions in discarded link-once
4956 sections, or weakly defined functions that have been overridden. It
4957 would be possible to remove many more entries for statically linked
4958 applications. */
4959
4960 bfd_boolean
4961 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4962 {
4963 bfd *ibfd;
4964 bfd_boolean some_edited = FALSE;
4965
4966 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4967 {
4968 asection *sec;
4969 Elf_Internal_Rela *relstart, *rel, *relend;
4970 Elf_Internal_Shdr *symtab_hdr;
4971 Elf_Internal_Sym *local_syms;
4972 struct elf_link_hash_entry **sym_hashes;
4973 bfd_vma offset;
4974 bfd_size_type amt;
4975 long *opd_adjust;
4976 bfd_boolean need_edit;
4977
4978 sec = bfd_get_section_by_name (ibfd, ".opd");
4979 if (sec == NULL)
4980 continue;
4981
4982 amt = sec->size * sizeof (long) / 24;
4983 opd_adjust = get_opd_info (sec);
4984 if (opd_adjust == NULL)
4985 {
4986 /* Must be a ld -r link. ie. check_relocs hasn't been
4987 called. */
4988 opd_adjust = bfd_zalloc (obfd, amt);
4989 ppc64_elf_section_data (sec)->opd.adjust = opd_adjust;
4990 }
4991 memset (opd_adjust, 0, amt);
4992
4993 if (sec->output_section == bfd_abs_section_ptr)
4994 continue;
4995
4996 /* Look through the section relocs. */
4997 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4998 continue;
4999
5000 local_syms = NULL;
5001 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5002 sym_hashes = elf_sym_hashes (ibfd);
5003
5004 /* Read the relocations. */
5005 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5006 info->keep_memory);
5007 if (relstart == NULL)
5008 return FALSE;
5009
5010 /* First run through the relocs to check they are sane, and to
5011 determine whether we need to edit this opd section. */
5012 need_edit = FALSE;
5013 offset = 0;
5014 relend = relstart + sec->reloc_count;
5015 for (rel = relstart; rel < relend; )
5016 {
5017 enum elf_ppc64_reloc_type r_type;
5018 unsigned long r_symndx;
5019 asection *sym_sec;
5020 struct elf_link_hash_entry *h;
5021 Elf_Internal_Sym *sym;
5022
5023 /* .opd contains a regular array of 24 byte entries. We're
5024 only interested in the reloc pointing to a function entry
5025 point. */
5026 if (rel->r_offset != offset
5027 || rel + 1 >= relend
5028 || (rel + 1)->r_offset != offset + 8)
5029 {
5030 /* If someone messes with .opd alignment then after a
5031 "ld -r" we might have padding in the middle of .opd.
5032 Also, there's nothing to prevent someone putting
5033 something silly in .opd with the assembler. No .opd
5034 optimization for them! */
5035 (*_bfd_error_handler)
5036 (_("%s: .opd is not a regular array of opd entries"),
5037 bfd_archive_filename (ibfd));
5038 need_edit = FALSE;
5039 break;
5040 }
5041
5042 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
5043 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
5044 {
5045 (*_bfd_error_handler)
5046 (_("%s: unexpected reloc type %u in .opd section"),
5047 bfd_archive_filename (ibfd), r_type);
5048 need_edit = FALSE;
5049 break;
5050 }
5051
5052 r_symndx = ELF64_R_SYM (rel->r_info);
5053 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5054 r_symndx, ibfd))
5055 goto error_ret;
5056
5057 if (sym_sec == NULL || sym_sec->owner == NULL)
5058 {
5059 const char *sym_name;
5060 if (h != NULL)
5061 sym_name = h->root.root.string;
5062 else
5063 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5064
5065 (*_bfd_error_handler)
5066 (_("%s: undefined sym `%s' in .opd section"),
5067 bfd_archive_filename (ibfd),
5068 sym_name);
5069 need_edit = FALSE;
5070 break;
5071 }
5072
5073 /* opd entries are always for functions defined in the
5074 current input bfd. If the symbol isn't defined in the
5075 input bfd, then we won't be using the function in this
5076 bfd; It must be defined in a linkonce section in another
5077 bfd, or is weak. It's also possible that we are
5078 discarding the function due to a linker script /DISCARD/,
5079 which we test for via the output_section. */
5080 if (sym_sec->owner != ibfd
5081 || sym_sec->output_section == bfd_abs_section_ptr)
5082 need_edit = TRUE;
5083
5084 offset += 24;
5085 rel += 2;
5086 /* Allow for the possibility of a reloc on the third word. */
5087 if (rel < relend
5088 && rel->r_offset == offset - 8)
5089 rel += 1;
5090 }
5091
5092 if (need_edit)
5093 {
5094 Elf_Internal_Rela *write_rel;
5095 bfd_byte *rptr, *wptr;
5096 bfd_boolean skip;
5097
5098 /* This seems a waste of time as input .opd sections are all
5099 zeros as generated by gcc, but I suppose there's no reason
5100 this will always be so. We might start putting something in
5101 the third word of .opd entries. */
5102 if ((sec->flags & SEC_IN_MEMORY) == 0)
5103 {
5104 bfd_byte *loc;
5105 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
5106 {
5107 if (loc != NULL)
5108 free (loc);
5109 error_ret:
5110 if (local_syms != NULL
5111 && symtab_hdr->contents != (unsigned char *) local_syms)
5112 free (local_syms);
5113 if (elf_section_data (sec)->relocs != relstart)
5114 free (relstart);
5115 return FALSE;
5116 }
5117 sec->contents = loc;
5118 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5119 }
5120
5121 elf_section_data (sec)->relocs = relstart;
5122
5123 wptr = sec->contents;
5124 rptr = sec->contents;
5125 write_rel = relstart;
5126 skip = FALSE;
5127 offset = 0;
5128 for (rel = relstart; rel < relend; rel++)
5129 {
5130 unsigned long r_symndx;
5131 asection *sym_sec;
5132 struct elf_link_hash_entry *h;
5133 Elf_Internal_Sym *sym;
5134
5135 r_symndx = ELF64_R_SYM (rel->r_info);
5136 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5137 r_symndx, ibfd))
5138 goto error_ret;
5139
5140 if (rel->r_offset == offset)
5141 {
5142 struct ppc_link_hash_entry *fdh = NULL;
5143 if (h != NULL
5144 && h->root.root.string[0] == '.')
5145 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5146 ppc_hash_table (info));
5147
5148 skip = (sym_sec->owner != ibfd
5149 || sym_sec->output_section == bfd_abs_section_ptr);
5150 if (skip)
5151 {
5152 if (fdh != NULL && sym_sec->owner == ibfd)
5153 {
5154 /* Arrange for the function descriptor sym
5155 to be dropped. */
5156 fdh->elf.root.u.def.value = 0;
5157 fdh->elf.root.u.def.section = sym_sec;
5158 }
5159 opd_adjust[rel->r_offset / 24] = -1;
5160 }
5161 else
5162 {
5163 /* We'll be keeping this opd entry. */
5164
5165 if (fdh != NULL)
5166 {
5167 /* Redefine the function descriptor symbol to
5168 this location in the opd section. It is
5169 necessary to update the value here rather
5170 than using an array of adjustments as we do
5171 for local symbols, because various places
5172 in the generic ELF code use the value
5173 stored in u.def.value. */
5174 fdh->elf.root.u.def.value = wptr - sec->contents;
5175 fdh->adjust_done = 1;
5176 }
5177
5178 /* Local syms are a bit tricky. We could
5179 tweak them as they can be cached, but
5180 we'd need to look through the local syms
5181 for the function descriptor sym which we
5182 don't have at the moment. So keep an
5183 array of adjustments. */
5184 opd_adjust[rel->r_offset / 24] = wptr - rptr;
5185
5186 if (wptr != rptr)
5187 memcpy (wptr, rptr, 24);
5188 wptr += 24;
5189 }
5190 rptr += 24;
5191 offset += 24;
5192 }
5193
5194 if (skip)
5195 {
5196 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5197 if (info->shared)
5198 {
5199 /* We won't be needing dynamic relocs here. */
5200 struct ppc_dyn_relocs **pp;
5201 struct ppc_dyn_relocs *p;
5202
5203 if (h != NULL)
5204 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5205 else if (sym_sec != NULL)
5206 pp = ((struct ppc_dyn_relocs **)
5207 &elf_section_data (sym_sec)->local_dynrel);
5208 else
5209 pp = ((struct ppc_dyn_relocs **)
5210 &elf_section_data (sec)->local_dynrel);
5211 while ((p = *pp) != NULL)
5212 {
5213 if (p->sec == sec)
5214 {
5215 p->count -= 1;
5216 if (p->count == 0)
5217 *pp = p->next;
5218 break;
5219 }
5220 pp = &p->next;
5221 }
5222 }
5223 }
5224 else
5225 {
5226 /* We need to adjust any reloc offsets to point to the
5227 new opd entries. While we're at it, we may as well
5228 remove redundant relocs. */
5229 rel->r_offset += wptr - rptr;
5230 if (write_rel != rel)
5231 memcpy (write_rel, rel, sizeof (*rel));
5232 ++write_rel;
5233 }
5234 }
5235
5236 sec->size = wptr - sec->contents;
5237 sec->reloc_count = write_rel - relstart;
5238 /* Fudge the size too, as this is used later in
5239 elf_bfd_final_link if we are emitting relocs. */
5240 elf_section_data (sec)->rel_hdr.sh_size
5241 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5242 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5243 some_edited = TRUE;
5244 }
5245 else if (elf_section_data (sec)->relocs != relstart)
5246 free (relstart);
5247
5248 if (local_syms != NULL
5249 && symtab_hdr->contents != (unsigned char *) local_syms)
5250 {
5251 if (!info->keep_memory)
5252 free (local_syms);
5253 else
5254 symtab_hdr->contents = (unsigned char *) local_syms;
5255 }
5256 }
5257
5258 if (some_edited)
5259 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
5260
5261 return TRUE;
5262 }
5263
5264 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
5265
5266 asection *
5267 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5268 {
5269 struct ppc_link_hash_table *htab;
5270
5271 htab = ppc_hash_table (info);
5272 if (htab->tls_get_addr != NULL)
5273 {
5274 struct elf_link_hash_entry *h = htab->tls_get_addr;
5275
5276 while (h->root.type == bfd_link_hash_indirect
5277 || h->root.type == bfd_link_hash_warning)
5278 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5279
5280 htab->tls_get_addr = h;
5281 }
5282
5283 return _bfd_elf_tls_setup (obfd, info);
5284 }
5285
5286 /* Run through all the TLS relocs looking for optimization
5287 opportunities. The linker has been hacked (see ppc64elf.em) to do
5288 a preliminary section layout so that we know the TLS segment
5289 offsets. We can't optimize earlier because some optimizations need
5290 to know the tp offset, and we need to optimize before allocating
5291 dynamic relocations. */
5292
5293 bfd_boolean
5294 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5295 {
5296 bfd *ibfd;
5297 asection *sec;
5298 struct ppc_link_hash_table *htab;
5299
5300 if (info->relocatable || info->shared)
5301 return TRUE;
5302
5303 htab = ppc_hash_table (info);
5304 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5305 {
5306 Elf_Internal_Sym *locsyms = NULL;
5307
5308 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5309 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5310 {
5311 Elf_Internal_Rela *relstart, *rel, *relend;
5312 int expecting_tls_get_addr;
5313
5314 /* Read the relocations. */
5315 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5316 info->keep_memory);
5317 if (relstart == NULL)
5318 return FALSE;
5319
5320 expecting_tls_get_addr = 0;
5321 relend = relstart + sec->reloc_count;
5322 for (rel = relstart; rel < relend; rel++)
5323 {
5324 enum elf_ppc64_reloc_type r_type;
5325 unsigned long r_symndx;
5326 struct elf_link_hash_entry *h;
5327 Elf_Internal_Sym *sym;
5328 asection *sym_sec;
5329 char *tls_mask;
5330 char tls_set, tls_clear, tls_type = 0;
5331 bfd_vma value;
5332 bfd_boolean ok_tprel, is_local;
5333
5334 r_symndx = ELF64_R_SYM (rel->r_info);
5335 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5336 r_symndx, ibfd))
5337 {
5338 err_free_rel:
5339 if (elf_section_data (sec)->relocs != relstart)
5340 free (relstart);
5341 if (locsyms != NULL
5342 && (elf_tdata (ibfd)->symtab_hdr.contents
5343 != (unsigned char *) locsyms))
5344 free (locsyms);
5345 return FALSE;
5346 }
5347
5348 if (h != NULL)
5349 {
5350 if (h->root.type != bfd_link_hash_defined
5351 && h->root.type != bfd_link_hash_defweak)
5352 continue;
5353 value = h->root.u.def.value;
5354 }
5355 else
5356 /* Symbols referenced by TLS relocs must be of type
5357 STT_TLS. So no need for .opd local sym adjust. */
5358 value = sym->st_value;
5359
5360 ok_tprel = FALSE;
5361 is_local = FALSE;
5362 if (h == NULL
5363 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5364 {
5365 is_local = TRUE;
5366 value += sym_sec->output_offset;
5367 value += sym_sec->output_section->vma;
5368 value -= htab->elf.tls_sec->vma;
5369 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5370 < (bfd_vma) 1 << 32);
5371 }
5372
5373 r_type = ELF64_R_TYPE (rel->r_info);
5374 switch (r_type)
5375 {
5376 case R_PPC64_GOT_TLSLD16:
5377 case R_PPC64_GOT_TLSLD16_LO:
5378 case R_PPC64_GOT_TLSLD16_HI:
5379 case R_PPC64_GOT_TLSLD16_HA:
5380 /* These relocs should never be against a symbol
5381 defined in a shared lib. Leave them alone if
5382 that turns out to be the case. */
5383 ppc64_tlsld_got (ibfd)->refcount -= 1;
5384 if (!is_local)
5385 continue;
5386
5387 /* LD -> LE */
5388 tls_set = 0;
5389 tls_clear = TLS_LD;
5390 tls_type = TLS_TLS | TLS_LD;
5391 expecting_tls_get_addr = 1;
5392 break;
5393
5394 case R_PPC64_GOT_TLSGD16:
5395 case R_PPC64_GOT_TLSGD16_LO:
5396 case R_PPC64_GOT_TLSGD16_HI:
5397 case R_PPC64_GOT_TLSGD16_HA:
5398 if (ok_tprel)
5399 /* GD -> LE */
5400 tls_set = 0;
5401 else
5402 /* GD -> IE */
5403 tls_set = TLS_TLS | TLS_TPRELGD;
5404 tls_clear = TLS_GD;
5405 tls_type = TLS_TLS | TLS_GD;
5406 expecting_tls_get_addr = 1;
5407 break;
5408
5409 case R_PPC64_GOT_TPREL16_DS:
5410 case R_PPC64_GOT_TPREL16_LO_DS:
5411 case R_PPC64_GOT_TPREL16_HI:
5412 case R_PPC64_GOT_TPREL16_HA:
5413 expecting_tls_get_addr = 0;
5414 if (ok_tprel)
5415 {
5416 /* IE -> LE */
5417 tls_set = 0;
5418 tls_clear = TLS_TPREL;
5419 tls_type = TLS_TLS | TLS_TPREL;
5420 break;
5421 }
5422 else
5423 continue;
5424
5425 case R_PPC64_REL14:
5426 case R_PPC64_REL14_BRTAKEN:
5427 case R_PPC64_REL14_BRNTAKEN:
5428 case R_PPC64_REL24:
5429 if (h != NULL
5430 && h == htab->tls_get_addr)
5431 {
5432 if (!expecting_tls_get_addr
5433 && rel != relstart
5434 && ((ELF64_R_TYPE (rel[-1].r_info)
5435 == R_PPC64_TOC16)
5436 || (ELF64_R_TYPE (rel[-1].r_info)
5437 == R_PPC64_TOC16_LO)))
5438 {
5439 /* Check for toc tls entries. */
5440 char *toc_tls;
5441 int retval;
5442
5443 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
5444 rel - 1, ibfd);
5445 if (retval == 0)
5446 goto err_free_rel;
5447 if (toc_tls != NULL)
5448 expecting_tls_get_addr = retval > 1;
5449 }
5450
5451 if (expecting_tls_get_addr)
5452 {
5453 struct plt_entry *ent;
5454 for (ent = h->plt.plist; ent; ent = ent->next)
5455 if (ent->addend == 0)
5456 {
5457 if (ent->plt.refcount > 0)
5458 ent->plt.refcount -= 1;
5459 break;
5460 }
5461 }
5462 }
5463 expecting_tls_get_addr = 0;
5464 continue;
5465
5466 case R_PPC64_TPREL64:
5467 expecting_tls_get_addr = 0;
5468 if (ok_tprel)
5469 {
5470 /* IE -> LE */
5471 tls_set = TLS_EXPLICIT;
5472 tls_clear = TLS_TPREL;
5473 break;
5474 }
5475 else
5476 continue;
5477
5478 case R_PPC64_DTPMOD64:
5479 expecting_tls_get_addr = 0;
5480 if (rel + 1 < relend
5481 && (rel[1].r_info
5482 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5483 && rel[1].r_offset == rel->r_offset + 8)
5484 {
5485 if (ok_tprel)
5486 /* GD -> LE */
5487 tls_set = TLS_EXPLICIT | TLS_GD;
5488 else
5489 /* GD -> IE */
5490 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5491 tls_clear = TLS_GD;
5492 }
5493 else
5494 {
5495 if (!is_local)
5496 continue;
5497
5498 /* LD -> LE */
5499 tls_set = TLS_EXPLICIT;
5500 tls_clear = TLS_LD;
5501 }
5502 break;
5503
5504 default:
5505 expecting_tls_get_addr = 0;
5506 continue;
5507 }
5508
5509 if ((tls_set & TLS_EXPLICIT) == 0)
5510 {
5511 struct got_entry *ent;
5512
5513 /* Adjust got entry for this reloc. */
5514 if (h != NULL)
5515 ent = h->got.glist;
5516 else
5517 ent = elf_local_got_ents (ibfd)[r_symndx];
5518
5519 for (; ent != NULL; ent = ent->next)
5520 if (ent->addend == rel->r_addend
5521 && ent->owner == ibfd
5522 && ent->tls_type == tls_type)
5523 break;
5524 if (ent == NULL)
5525 abort ();
5526
5527 if (tls_set == 0)
5528 {
5529 /* We managed to get rid of a got entry. */
5530 if (ent->got.refcount > 0)
5531 ent->got.refcount -= 1;
5532 }
5533 }
5534 else if (h != NULL)
5535 {
5536 struct ppc_link_hash_entry * eh;
5537 struct ppc_dyn_relocs **pp;
5538 struct ppc_dyn_relocs *p;
5539
5540 /* Adjust dynamic relocs. */
5541 eh = (struct ppc_link_hash_entry *) h;
5542 for (pp = &eh->dyn_relocs;
5543 (p = *pp) != NULL;
5544 pp = &p->next)
5545 if (p->sec == sec)
5546 {
5547 /* If we got rid of a DTPMOD/DTPREL reloc
5548 pair then we'll lose one or two dyn
5549 relocs. */
5550 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5551 p->count -= 1;
5552 p->count -= 1;
5553 if (p->count == 0)
5554 *pp = p->next;
5555 break;
5556 }
5557 }
5558
5559 *tls_mask |= tls_set;
5560 *tls_mask &= ~tls_clear;
5561 }
5562
5563 if (elf_section_data (sec)->relocs != relstart)
5564 free (relstart);
5565 }
5566
5567 if (locsyms != NULL
5568 && (elf_tdata (ibfd)->symtab_hdr.contents
5569 != (unsigned char *) locsyms))
5570 {
5571 if (!info->keep_memory)
5572 free (locsyms);
5573 else
5574 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5575 }
5576 }
5577 return TRUE;
5578 }
5579
5580 /* Allocate space in .plt, .got and associated reloc sections for
5581 dynamic relocs. */
5582
5583 static bfd_boolean
5584 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5585 {
5586 struct bfd_link_info *info;
5587 struct ppc_link_hash_table *htab;
5588 asection *s;
5589 struct ppc_link_hash_entry *eh;
5590 struct ppc_dyn_relocs *p;
5591 struct got_entry *gent;
5592
5593 if (h->root.type == bfd_link_hash_indirect)
5594 return TRUE;
5595
5596 if (h->root.type == bfd_link_hash_warning)
5597 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5598
5599 info = (struct bfd_link_info *) inf;
5600 htab = ppc_hash_table (info);
5601
5602 if (htab->elf.dynamic_sections_created
5603 && h->dynindx != -1
5604 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5605 {
5606 struct plt_entry *pent;
5607 bfd_boolean doneone = FALSE;
5608 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5609 if (pent->plt.refcount > 0)
5610 {
5611 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5612
5613 /* If this is the first .plt entry, make room for the special
5614 first entry. */
5615 s = htab->plt;
5616 if (s->size == 0)
5617 s->size += PLT_INITIAL_ENTRY_SIZE;
5618
5619 pent->plt.offset = s->size;
5620
5621 /* Make room for this entry. */
5622 s->size += PLT_ENTRY_SIZE;
5623
5624 /* Make room for the .glink code. */
5625 s = htab->glink;
5626 if (s->size == 0)
5627 s->size += GLINK_CALL_STUB_SIZE;
5628 /* We need bigger stubs past index 32767. */
5629 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5630 s->size += 4;
5631 s->size += 2*4;
5632
5633 /* We also need to make an entry in the .rela.plt section. */
5634 s = htab->relplt;
5635 s->size += sizeof (Elf64_External_Rela);
5636 doneone = TRUE;
5637 }
5638 else
5639 pent->plt.offset = (bfd_vma) -1;
5640 if (!doneone)
5641 {
5642 h->plt.plist = NULL;
5643 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5644 }
5645 }
5646 else
5647 {
5648 h->plt.plist = NULL;
5649 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5650 }
5651
5652 eh = (struct ppc_link_hash_entry *) h;
5653 /* Run through the TLS GD got entries first if we're changing them
5654 to TPREL. */
5655 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5656 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5657 if (gent->got.refcount > 0
5658 && (gent->tls_type & TLS_GD) != 0)
5659 {
5660 /* This was a GD entry that has been converted to TPREL. If
5661 there happens to be a TPREL entry we can use that one. */
5662 struct got_entry *ent;
5663 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5664 if (ent->got.refcount > 0
5665 && (ent->tls_type & TLS_TPREL) != 0
5666 && ent->addend == gent->addend
5667 && ent->owner == gent->owner)
5668 {
5669 gent->got.refcount = 0;
5670 break;
5671 }
5672
5673 /* If not, then we'll be using our own TPREL entry. */
5674 if (gent->got.refcount != 0)
5675 gent->tls_type = TLS_TLS | TLS_TPREL;
5676 }
5677
5678 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5679 if (gent->got.refcount > 0)
5680 {
5681 bfd_boolean dyn;
5682
5683 /* Make sure this symbol is output as a dynamic symbol.
5684 Undefined weak syms won't yet be marked as dynamic,
5685 nor will all TLS symbols. */
5686 if (h->dynindx == -1
5687 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5688 {
5689 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5690 return FALSE;
5691 }
5692
5693 if ((gent->tls_type & TLS_LD) != 0
5694 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5695 {
5696 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5697 continue;
5698 }
5699
5700 s = ppc64_elf_tdata (gent->owner)->got;
5701 gent->got.offset = s->size;
5702 s->size
5703 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5704 dyn = htab->elf.dynamic_sections_created;
5705 if ((info->shared
5706 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5707 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5708 || h->root.type != bfd_link_hash_undefweak))
5709 ppc64_elf_tdata (gent->owner)->relgot->size
5710 += (gent->tls_type & eh->tls_mask & TLS_GD
5711 ? 2 * sizeof (Elf64_External_Rela)
5712 : sizeof (Elf64_External_Rela));
5713 }
5714 else
5715 gent->got.offset = (bfd_vma) -1;
5716
5717 if (eh->dyn_relocs == NULL)
5718 return TRUE;
5719
5720 /* In the shared -Bsymbolic case, discard space allocated for
5721 dynamic pc-relative relocs against symbols which turn out to be
5722 defined in regular objects. For the normal shared case, discard
5723 space for relocs that have become local due to symbol visibility
5724 changes. */
5725
5726 if (info->shared)
5727 {
5728 /* Relocs that use pc_count are those that appear on a call insn,
5729 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5730 generated via assembly. We want calls to protected symbols to
5731 resolve directly to the function rather than going via the plt.
5732 If people want function pointer comparisons to work as expected
5733 then they should avoid writing weird assembly. */
5734 if (SYMBOL_CALLS_LOCAL (info, h))
5735 {
5736 struct ppc_dyn_relocs **pp;
5737
5738 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5739 {
5740 p->count -= p->pc_count;
5741 p->pc_count = 0;
5742 if (p->count == 0)
5743 *pp = p->next;
5744 else
5745 pp = &p->next;
5746 }
5747 }
5748
5749 /* Also discard relocs on undefined weak syms with non-default
5750 visibility. */
5751 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5752 && h->root.type == bfd_link_hash_undefweak)
5753 eh->dyn_relocs = NULL;
5754 }
5755 else if (ELIMINATE_COPY_RELOCS)
5756 {
5757 /* For the non-shared case, discard space for relocs against
5758 symbols which turn out to need copy relocs or are not
5759 dynamic. */
5760
5761 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5762 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5763 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5764 {
5765 /* Make sure this symbol is output as a dynamic symbol.
5766 Undefined weak syms won't yet be marked as dynamic. */
5767 if (h->dynindx == -1
5768 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5769 {
5770 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5771 return FALSE;
5772 }
5773
5774 /* If that succeeded, we know we'll be keeping all the
5775 relocs. */
5776 if (h->dynindx != -1)
5777 goto keep;
5778 }
5779
5780 eh->dyn_relocs = NULL;
5781
5782 keep: ;
5783 }
5784
5785 /* Finally, allocate space. */
5786 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5787 {
5788 asection *sreloc = elf_section_data (p->sec)->sreloc;
5789 sreloc->size += p->count * sizeof (Elf64_External_Rela);
5790 }
5791
5792 return TRUE;
5793 }
5794
5795 /* Find any dynamic relocs that apply to read-only sections. */
5796
5797 static bfd_boolean
5798 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5799 {
5800 struct ppc_link_hash_entry *eh;
5801 struct ppc_dyn_relocs *p;
5802
5803 if (h->root.type == bfd_link_hash_warning)
5804 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5805
5806 eh = (struct ppc_link_hash_entry *) h;
5807 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5808 {
5809 asection *s = p->sec->output_section;
5810
5811 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5812 {
5813 struct bfd_link_info *info = inf;
5814
5815 info->flags |= DF_TEXTREL;
5816
5817 /* Not an error, just cut short the traversal. */
5818 return FALSE;
5819 }
5820 }
5821 return TRUE;
5822 }
5823
5824 /* Set the sizes of the dynamic sections. */
5825
5826 static bfd_boolean
5827 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5828 struct bfd_link_info *info)
5829 {
5830 struct ppc_link_hash_table *htab;
5831 bfd *dynobj;
5832 asection *s;
5833 bfd_boolean relocs;
5834 bfd *ibfd;
5835
5836 htab = ppc_hash_table (info);
5837 dynobj = htab->elf.dynobj;
5838 if (dynobj == NULL)
5839 abort ();
5840
5841 if (htab->elf.dynamic_sections_created)
5842 {
5843 /* Set the contents of the .interp section to the interpreter. */
5844 if (info->executable)
5845 {
5846 s = bfd_get_section_by_name (dynobj, ".interp");
5847 if (s == NULL)
5848 abort ();
5849 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5850 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5851 }
5852 }
5853
5854 /* Set up .got offsets for local syms, and space for local dynamic
5855 relocs. */
5856 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5857 {
5858 struct got_entry **lgot_ents;
5859 struct got_entry **end_lgot_ents;
5860 char *lgot_masks;
5861 bfd_size_type locsymcount;
5862 Elf_Internal_Shdr *symtab_hdr;
5863 asection *srel;
5864
5865 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5866 continue;
5867
5868 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5869 {
5870 s = ppc64_elf_tdata (ibfd)->got;
5871 ppc64_tlsld_got (ibfd)->offset = s->size;
5872 s->size += 16;
5873 if (info->shared)
5874 {
5875 srel = ppc64_elf_tdata (ibfd)->relgot;
5876 srel->size += sizeof (Elf64_External_Rela);
5877 }
5878 }
5879 else
5880 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5881
5882 for (s = ibfd->sections; s != NULL; s = s->next)
5883 {
5884 struct ppc_dyn_relocs *p;
5885
5886 for (p = *((struct ppc_dyn_relocs **)
5887 &elf_section_data (s)->local_dynrel);
5888 p != NULL;
5889 p = p->next)
5890 {
5891 if (!bfd_is_abs_section (p->sec)
5892 && bfd_is_abs_section (p->sec->output_section))
5893 {
5894 /* Input section has been discarded, either because
5895 it is a copy of a linkonce section or due to
5896 linker script /DISCARD/, so we'll be discarding
5897 the relocs too. */
5898 }
5899 else if (p->count != 0)
5900 {
5901 srel = elf_section_data (p->sec)->sreloc;
5902 srel->size += p->count * sizeof (Elf64_External_Rela);
5903 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5904 info->flags |= DF_TEXTREL;
5905 }
5906 }
5907 }
5908
5909 lgot_ents = elf_local_got_ents (ibfd);
5910 if (!lgot_ents)
5911 continue;
5912
5913 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5914 locsymcount = symtab_hdr->sh_info;
5915 end_lgot_ents = lgot_ents + locsymcount;
5916 lgot_masks = (char *) end_lgot_ents;
5917 s = ppc64_elf_tdata (ibfd)->got;
5918 srel = ppc64_elf_tdata (ibfd)->relgot;
5919 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5920 {
5921 struct got_entry *ent;
5922
5923 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5924 if (ent->got.refcount > 0)
5925 {
5926 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5927 {
5928 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5929 {
5930 ppc64_tlsld_got (ibfd)->offset = s->size;
5931 s->size += 16;
5932 if (info->shared)
5933 srel->size += sizeof (Elf64_External_Rela);
5934 }
5935 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5936 }
5937 else
5938 {
5939 ent->got.offset = s->size;
5940 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5941 {
5942 s->size += 16;
5943 if (info->shared)
5944 srel->size += 2 * sizeof (Elf64_External_Rela);
5945 }
5946 else
5947 {
5948 s->size += 8;
5949 if (info->shared)
5950 srel->size += sizeof (Elf64_External_Rela);
5951 }
5952 }
5953 }
5954 else
5955 ent->got.offset = (bfd_vma) -1;
5956 }
5957 }
5958
5959 /* Allocate global sym .plt and .got entries, and space for global
5960 sym dynamic relocs. */
5961 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5962
5963 /* We now have determined the sizes of the various dynamic sections.
5964 Allocate memory for them. */
5965 relocs = FALSE;
5966 for (s = dynobj->sections; s != NULL; s = s->next)
5967 {
5968 if ((s->flags & SEC_LINKER_CREATED) == 0)
5969 continue;
5970
5971 if (s == htab->brlt || s == htab->relbrlt)
5972 /* These haven't been allocated yet; don't strip. */
5973 continue;
5974 else if (s == htab->got
5975 || s == htab->plt
5976 || s == htab->glink)
5977 {
5978 /* Strip this section if we don't need it; see the
5979 comment below. */
5980 }
5981 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5982 {
5983 if (s->size == 0)
5984 {
5985 /* If we don't need this section, strip it from the
5986 output file. This is mostly to handle .rela.bss and
5987 .rela.plt. We must create both sections in
5988 create_dynamic_sections, because they must be created
5989 before the linker maps input sections to output
5990 sections. The linker does that before
5991 adjust_dynamic_symbol is called, and it is that
5992 function which decides whether anything needs to go
5993 into these sections. */
5994 }
5995 else
5996 {
5997 if (s != htab->relplt)
5998 relocs = TRUE;
5999
6000 /* We use the reloc_count field as a counter if we need
6001 to copy relocs into the output file. */
6002 s->reloc_count = 0;
6003 }
6004 }
6005 else
6006 {
6007 /* It's not one of our sections, so don't allocate space. */
6008 continue;
6009 }
6010
6011 if (s->size == 0)
6012 {
6013 _bfd_strip_section_from_output (info, s);
6014 continue;
6015 }
6016
6017 /* .plt is in the bss section. We don't initialise it. */
6018 if (s == htab->plt)
6019 continue;
6020
6021 /* Allocate memory for the section contents. We use bfd_zalloc
6022 here in case unused entries are not reclaimed before the
6023 section's contents are written out. This should not happen,
6024 but this way if it does we get a R_PPC64_NONE reloc in .rela
6025 sections instead of garbage.
6026 We also rely on the section contents being zero when writing
6027 the GOT. */
6028 s->contents = bfd_zalloc (dynobj, s->size);
6029 if (s->contents == NULL)
6030 return FALSE;
6031 }
6032
6033 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6034 {
6035 s = ppc64_elf_tdata (ibfd)->got;
6036 if (s != NULL && s != htab->got)
6037 {
6038 if (s->size == 0)
6039 _bfd_strip_section_from_output (info, s);
6040 else
6041 {
6042 s->contents = bfd_zalloc (ibfd, s->size);
6043 if (s->contents == NULL)
6044 return FALSE;
6045 }
6046 }
6047 s = ppc64_elf_tdata (ibfd)->relgot;
6048 if (s != NULL)
6049 {
6050 if (s->size == 0)
6051 _bfd_strip_section_from_output (info, s);
6052 else
6053 {
6054 s->contents = bfd_zalloc (ibfd, s->size);
6055 if (s->contents == NULL)
6056 return FALSE;
6057 relocs = TRUE;
6058 s->reloc_count = 0;
6059 }
6060 }
6061 }
6062
6063 if (htab->elf.dynamic_sections_created)
6064 {
6065 /* Add some entries to the .dynamic section. We fill in the
6066 values later, in ppc64_elf_finish_dynamic_sections, but we
6067 must add the entries now so that we get the correct size for
6068 the .dynamic section. The DT_DEBUG entry is filled in by the
6069 dynamic linker and used by the debugger. */
6070 #define add_dynamic_entry(TAG, VAL) \
6071 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6072
6073 if (info->executable)
6074 {
6075 if (!add_dynamic_entry (DT_DEBUG, 0))
6076 return FALSE;
6077 }
6078
6079 if (htab->plt != NULL && htab->plt->size != 0)
6080 {
6081 if (!add_dynamic_entry (DT_PLTGOT, 0)
6082 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6083 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6084 || !add_dynamic_entry (DT_JMPREL, 0)
6085 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6086 return FALSE;
6087 }
6088
6089 if (NO_OPD_RELOCS)
6090 {
6091 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6092 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6093 return FALSE;
6094 }
6095
6096 if (relocs)
6097 {
6098 if (!add_dynamic_entry (DT_RELA, 0)
6099 || !add_dynamic_entry (DT_RELASZ, 0)
6100 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6101 return FALSE;
6102
6103 /* If any dynamic relocs apply to a read-only section,
6104 then we need a DT_TEXTREL entry. */
6105 if ((info->flags & DF_TEXTREL) == 0)
6106 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6107
6108 if ((info->flags & DF_TEXTREL) != 0)
6109 {
6110 if (!add_dynamic_entry (DT_TEXTREL, 0))
6111 return FALSE;
6112 }
6113 }
6114 }
6115 #undef add_dynamic_entry
6116
6117 return TRUE;
6118 }
6119
6120 /* Determine the type of stub needed, if any, for a call. */
6121
6122 static inline enum ppc_stub_type
6123 ppc_type_of_stub (asection *input_sec,
6124 const Elf_Internal_Rela *rel,
6125 struct ppc_link_hash_entry **hash,
6126 bfd_vma destination)
6127 {
6128 struct ppc_link_hash_entry *h = *hash;
6129 bfd_vma location;
6130 bfd_vma branch_offset;
6131 bfd_vma max_branch_offset;
6132 enum elf_ppc64_reloc_type r_type;
6133
6134 if (h != NULL)
6135 {
6136 if (h->oh != NULL
6137 && h->oh->elf.dynindx != -1)
6138 {
6139 struct plt_entry *ent;
6140 for (ent = h->oh->elf.plt.plist; ent != NULL; ent = ent->next)
6141 if (ent->addend == rel->r_addend
6142 && ent->plt.offset != (bfd_vma) -1)
6143 {
6144 *hash = h->oh;
6145 return ppc_stub_plt_call;
6146 }
6147 }
6148
6149 if (!(h->elf.root.type == bfd_link_hash_defined
6150 || h->elf.root.type == bfd_link_hash_defweak)
6151 || h->elf.root.u.def.section->output_section == NULL)
6152 return ppc_stub_none;
6153 }
6154
6155 /* Determine where the call point is. */
6156 location = (input_sec->output_offset
6157 + input_sec->output_section->vma
6158 + rel->r_offset);
6159
6160 branch_offset = destination - location;
6161 r_type = ELF64_R_TYPE (rel->r_info);
6162
6163 /* Determine if a long branch stub is needed. */
6164 max_branch_offset = 1 << 25;
6165 if (r_type != R_PPC64_REL24)
6166 max_branch_offset = 1 << 15;
6167
6168 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6169 /* We need a stub. Figure out whether a long_branch or plt_branch
6170 is needed later. */
6171 return ppc_stub_long_branch;
6172
6173 return ppc_stub_none;
6174 }
6175
6176 /* Build a .plt call stub. */
6177
6178 static inline bfd_byte *
6179 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6180 {
6181 #define PPC_LO(v) ((v) & 0xffff)
6182 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6183 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6184
6185 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6186 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6187 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6188 if (PPC_HA (offset + 8) != PPC_HA (offset))
6189 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6190 offset += 8;
6191 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6192 if (PPC_HA (offset + 8) != PPC_HA (offset))
6193 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6194 offset += 8;
6195 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6196 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6197 bfd_put_32 (obfd, BCTR, p), p += 4;
6198 return p;
6199 }
6200
6201 static bfd_boolean
6202 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6203 {
6204 struct ppc_stub_hash_entry *stub_entry;
6205 struct ppc_branch_hash_entry *br_entry;
6206 struct bfd_link_info *info;
6207 struct ppc_link_hash_table *htab;
6208 bfd_byte *loc;
6209 bfd_byte *p;
6210 unsigned int indx;
6211 struct plt_entry *ent;
6212 bfd_vma off;
6213 int size;
6214
6215 /* Massage our args to the form they really have. */
6216 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6217 info = in_arg;
6218
6219 htab = ppc_hash_table (info);
6220
6221 /* Make a note of the offset within the stubs for this entry. */
6222 stub_entry->stub_offset = stub_entry->stub_sec->size;
6223 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6224
6225 htab->stub_count[stub_entry->stub_type - 1] += 1;
6226 switch (stub_entry->stub_type)
6227 {
6228 case ppc_stub_long_branch:
6229 case ppc_stub_long_branch_r2off:
6230 /* Branches are relative. This is where we are going to. */
6231 off = (stub_entry->target_value
6232 + stub_entry->target_section->output_offset
6233 + stub_entry->target_section->output_section->vma);
6234
6235 /* And this is where we are coming from. */
6236 off -= (stub_entry->stub_offset
6237 + stub_entry->stub_sec->output_offset
6238 + stub_entry->stub_sec->output_section->vma);
6239
6240 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6241 size = 4;
6242 else
6243 {
6244 bfd_vma r2off;
6245
6246 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6247 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6248 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6249 loc += 4;
6250 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6251 loc += 4;
6252 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6253 loc += 4;
6254 off -= 12;
6255 size = 16;
6256 }
6257 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6258
6259 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6260 break;
6261
6262 case ppc_stub_plt_branch:
6263 case ppc_stub_plt_branch_r2off:
6264 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6265 stub_entry->root.string + 9,
6266 FALSE, FALSE);
6267 if (br_entry == NULL)
6268 {
6269 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6270 stub_entry->root.string + 9);
6271 htab->stub_error = TRUE;
6272 return FALSE;
6273 }
6274
6275 off = (stub_entry->target_value
6276 + stub_entry->target_section->output_offset
6277 + stub_entry->target_section->output_section->vma);
6278
6279 bfd_put_64 (htab->brlt->owner, off,
6280 htab->brlt->contents + br_entry->offset);
6281
6282 if (info->shared)
6283 {
6284 /* Create a reloc for the branch lookup table entry. */
6285 Elf_Internal_Rela rela;
6286 bfd_byte *rl;
6287
6288 rela.r_offset = (br_entry->offset
6289 + htab->brlt->output_offset
6290 + htab->brlt->output_section->vma);
6291 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6292 rela.r_addend = off;
6293
6294 rl = htab->relbrlt->contents;
6295 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6296 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6297 }
6298
6299 off = (br_entry->offset
6300 + htab->brlt->output_offset
6301 + htab->brlt->output_section->vma
6302 - elf_gp (htab->brlt->output_section->owner)
6303 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6304
6305 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6306 {
6307 (*_bfd_error_handler)
6308 (_("linkage table error against `%s'"),
6309 stub_entry->root.string);
6310 bfd_set_error (bfd_error_bad_value);
6311 htab->stub_error = TRUE;
6312 return FALSE;
6313 }
6314
6315 indx = off;
6316 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6317 {
6318 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6319 loc += 4;
6320 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6321 size = 16;
6322 }
6323 else
6324 {
6325 bfd_vma r2off;
6326
6327 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6328 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6329 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6330 loc += 4;
6331 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6332 loc += 4;
6333 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6334 loc += 4;
6335 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6336 loc += 4;
6337 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6338 size = 28;
6339 }
6340 loc += 4;
6341 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6342 loc += 4;
6343 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6344 break;
6345
6346 case ppc_stub_plt_call:
6347 /* Do the best we can for shared libraries built without
6348 exporting ".foo" for each "foo". This can happen when symbol
6349 versioning scripts strip all bar a subset of symbols. */
6350 if (stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
6351 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
6352 {
6353 /* Point the symbol at the stub. There may be multiple stubs,
6354 we don't really care; The main thing is to make this sym
6355 defined somewhere. Maybe defining the symbol in the stub
6356 section is a silly idea. If we didn't do this, htab->top_id
6357 could disappear. */
6358 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
6359 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
6360 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
6361 }
6362
6363 /* Now build the stub. */
6364 off = (bfd_vma) -1;
6365 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6366 if (ent->addend == stub_entry->addend)
6367 {
6368 off = ent->plt.offset;
6369 break;
6370 }
6371 if (off >= (bfd_vma) -2)
6372 abort ();
6373
6374 off &= ~ (bfd_vma) 1;
6375 off += (htab->plt->output_offset
6376 + htab->plt->output_section->vma
6377 - elf_gp (htab->plt->output_section->owner)
6378 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6379
6380 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6381 {
6382 (*_bfd_error_handler)
6383 (_("linkage table error against `%s'"),
6384 stub_entry->h->elf.root.root.string);
6385 bfd_set_error (bfd_error_bad_value);
6386 htab->stub_error = TRUE;
6387 return FALSE;
6388 }
6389
6390 p = build_plt_stub (htab->stub_bfd, loc, off);
6391 size = p - loc;
6392 break;
6393
6394 default:
6395 BFD_FAIL ();
6396 return FALSE;
6397 }
6398
6399 stub_entry->stub_sec->size += size;
6400
6401 if (htab->emit_stub_syms
6402 && !(stub_entry->stub_type == ppc_stub_plt_call
6403 && stub_entry->h->oh->elf.root.type == bfd_link_hash_defined
6404 && stub_entry->h->oh->elf.root.u.def.section == stub_entry->stub_sec
6405 && stub_entry->h->oh->elf.root.u.def.value == stub_entry->stub_offset))
6406 {
6407 struct elf_link_hash_entry *h;
6408 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6409 TRUE, FALSE, FALSE);
6410 if (h == NULL)
6411 return FALSE;
6412 if (h->root.type == bfd_link_hash_new)
6413 {
6414 h->root.type = bfd_link_hash_defined;
6415 h->root.u.def.section = stub_entry->stub_sec;
6416 h->root.u.def.value = stub_entry->stub_offset;
6417 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6418 | ELF_LINK_HASH_DEF_REGULAR
6419 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6420 | ELF_LINK_FORCED_LOCAL);
6421 }
6422 }
6423
6424 return TRUE;
6425 }
6426
6427 /* As above, but don't actually build the stub. Just bump offset so
6428 we know stub section sizes, and select plt_branch stubs where
6429 long_branch stubs won't do. */
6430
6431 static bfd_boolean
6432 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6433 {
6434 struct ppc_stub_hash_entry *stub_entry;
6435 struct bfd_link_info *info;
6436 struct ppc_link_hash_table *htab;
6437 bfd_vma off;
6438 int size;
6439
6440 /* Massage our args to the form they really have. */
6441 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6442 info = in_arg;
6443
6444 htab = ppc_hash_table (info);
6445
6446 if (stub_entry->stub_type == ppc_stub_plt_call)
6447 {
6448 struct plt_entry *ent;
6449 off = (bfd_vma) -1;
6450 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6451 if (ent->addend == stub_entry->addend)
6452 {
6453 off = ent->plt.offset & ~(bfd_vma) 1;
6454 break;
6455 }
6456 if (off >= (bfd_vma) -2)
6457 abort ();
6458 off += (htab->plt->output_offset
6459 + htab->plt->output_section->vma
6460 - elf_gp (htab->plt->output_section->owner)
6461 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6462
6463 size = PLT_CALL_STUB_SIZE;
6464 if (PPC_HA (off + 16) != PPC_HA (off))
6465 size += 4;
6466 }
6467 else
6468 {
6469 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6470 variants. */
6471 off = (stub_entry->target_value
6472 + stub_entry->target_section->output_offset
6473 + stub_entry->target_section->output_section->vma);
6474 off -= (stub_entry->stub_sec->size
6475 + stub_entry->stub_sec->output_offset
6476 + stub_entry->stub_sec->output_section->vma);
6477
6478 /* Reset the stub type from the plt variant in case we now
6479 can reach with a shorter stub. */
6480 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6481 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6482
6483 size = 4;
6484 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6485 {
6486 off -= 12;
6487 size = 16;
6488 }
6489
6490 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6491 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6492 {
6493 struct ppc_branch_hash_entry *br_entry;
6494
6495 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6496 stub_entry->root.string + 9,
6497 TRUE, FALSE);
6498 if (br_entry == NULL)
6499 {
6500 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6501 stub_entry->root.string + 9);
6502 htab->stub_error = TRUE;
6503 return FALSE;
6504 }
6505
6506 if (br_entry->iter != htab->stub_iteration)
6507 {
6508 br_entry->iter = htab->stub_iteration;
6509 br_entry->offset = htab->brlt->size;
6510 htab->brlt->size += 8;
6511
6512 if (info->shared)
6513 htab->relbrlt->size += sizeof (Elf64_External_Rela);
6514 }
6515
6516 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6517 size = 16;
6518 if (stub_entry->stub_type != ppc_stub_plt_branch)
6519 size = 28;
6520 }
6521 }
6522
6523 stub_entry->stub_sec->size += size;
6524 return TRUE;
6525 }
6526
6527 /* Set up various things so that we can make a list of input sections
6528 for each output section included in the link. Returns -1 on error,
6529 0 when no stubs will be needed, and 1 on success. */
6530
6531 int
6532 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6533 {
6534 bfd *input_bfd;
6535 int top_id, top_index, id;
6536 asection *section;
6537 asection **input_list;
6538 bfd_size_type amt;
6539 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6540
6541 if (htab->brlt == NULL)
6542 return 0;
6543
6544 /* Find the top input section id. */
6545 for (input_bfd = info->input_bfds, top_id = 3;
6546 input_bfd != NULL;
6547 input_bfd = input_bfd->link_next)
6548 {
6549 for (section = input_bfd->sections;
6550 section != NULL;
6551 section = section->next)
6552 {
6553 if (top_id < section->id)
6554 top_id = section->id;
6555 }
6556 }
6557
6558 htab->top_id = top_id;
6559 amt = sizeof (struct map_stub) * (top_id + 1);
6560 htab->stub_group = bfd_zmalloc (amt);
6561 if (htab->stub_group == NULL)
6562 return -1;
6563
6564 /* Set toc_off for com, und, abs and ind sections. */
6565 for (id = 0; id < 3; id++)
6566 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6567
6568 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6569
6570 /* We can't use output_bfd->section_count here to find the top output
6571 section index as some sections may have been removed, and
6572 _bfd_strip_section_from_output doesn't renumber the indices. */
6573 for (section = output_bfd->sections, top_index = 0;
6574 section != NULL;
6575 section = section->next)
6576 {
6577 if (top_index < section->index)
6578 top_index = section->index;
6579 }
6580
6581 htab->top_index = top_index;
6582 amt = sizeof (asection *) * (top_index + 1);
6583 input_list = bfd_zmalloc (amt);
6584 htab->input_list = input_list;
6585 if (input_list == NULL)
6586 return -1;
6587
6588 return 1;
6589 }
6590
6591 /* The linker repeatedly calls this function for each TOC input section
6592 and linker generated GOT section. Group input bfds such that the toc
6593 within a group is less than 64k in size. Will break with cute linker
6594 scripts that play games with dot in the output toc section. */
6595
6596 void
6597 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6598 {
6599 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6600
6601 if (!htab->no_multi_toc)
6602 {
6603 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6604 bfd_vma off = addr - htab->toc_curr;
6605 if (off + isec->size > 0x10000)
6606 {
6607 htab->toc_curr = addr;
6608 htab->multi_toc_needed = 1;
6609 }
6610 elf_gp (isec->owner) = (htab->toc_curr
6611 - elf_gp (isec->output_section->owner)
6612 + TOC_BASE_OFF);
6613 }
6614 }
6615
6616 /* Called after the last call to the above function. */
6617
6618 void
6619 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6620 struct bfd_link_info *info)
6621 {
6622 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6623
6624 /* toc_curr tracks the TOC offset used for code sections below in
6625 ppc64_elf_next_input_section. Start off at 0x8000. */
6626 htab->toc_curr = TOC_BASE_OFF;
6627 }
6628
6629 /* No toc references were found in ISEC. If the code in ISEC makes no
6630 calls, then there's no need to use toc adjusting stubs when branching
6631 into ISEC. Actually, indirect calls from ISEC are OK as they will
6632 load r2. */
6633
6634 static int
6635 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6636 {
6637 bfd_byte *contents;
6638 bfd_size_type i;
6639 int ret;
6640 int branch_ok;
6641
6642 /* We know none of our code bearing sections will need toc stubs. */
6643 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6644 return 0;
6645
6646 if (isec->size == 0)
6647 return 0;
6648
6649 /* Hack for linux kernel. .fixup contains branches, but only back to
6650 the function that hit an exception. */
6651 branch_ok = strcmp (isec->name, ".fixup") == 0;
6652
6653 contents = elf_section_data (isec)->this_hdr.contents;
6654 if (contents == NULL)
6655 {
6656 if (!bfd_malloc_and_get_section (isec->owner, isec, &contents))
6657 {
6658 if (contents != NULL)
6659 free (contents);
6660 return -1;
6661 }
6662 if (info->keep_memory)
6663 elf_section_data (isec)->this_hdr.contents = contents;
6664 }
6665
6666 /* Code scan, because we don't necessarily have relocs on calls to
6667 static functions. */
6668 ret = 0;
6669 for (i = 0; i < isec->size; i += 4)
6670 {
6671 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6672 /* Is this a branch? */
6673 if ((insn & (0x3f << 26)) == (18 << 26)
6674 /* If branch and link, it's a function call. */
6675 && ((insn & 1) != 0
6676 /* Sibling calls use a plain branch. I don't know a way
6677 of deciding whether a branch is really a sibling call. */
6678 || !branch_ok))
6679 {
6680 ret = 1;
6681 break;
6682 }
6683 }
6684
6685 if (elf_section_data (isec)->this_hdr.contents != contents)
6686 free (contents);
6687 return ret;
6688 }
6689
6690 /* The linker repeatedly calls this function for each input section,
6691 in the order that input sections are linked into output sections.
6692 Build lists of input sections to determine groupings between which
6693 we may insert linker stubs. */
6694
6695 bfd_boolean
6696 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6697 {
6698 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6699 int ret;
6700
6701 if ((isec->output_section->flags & SEC_CODE) != 0
6702 && isec->output_section->index <= htab->top_index)
6703 {
6704 asection **list = htab->input_list + isec->output_section->index;
6705 /* Steal the link_sec pointer for our list. */
6706 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6707 /* This happens to make the list in reverse order,
6708 which is what we want. */
6709 PREV_SEC (isec) = *list;
6710 *list = isec;
6711 }
6712
6713 /* If a code section has a function that uses the TOC then we need
6714 to use the right TOC (obviously). Also, make sure that .opd gets
6715 the correct TOC value for R_PPC64_TOC relocs that don't have or
6716 can't find their function symbol (shouldn't ever happen now). */
6717 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6718 {
6719 if (elf_gp (isec->owner) != 0)
6720 htab->toc_curr = elf_gp (isec->owner);
6721 }
6722 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6723 return FALSE;
6724 else
6725 isec->has_gp_reloc = ret;
6726
6727 /* Functions that don't use the TOC can belong in any TOC group.
6728 Use the last TOC base. This happens to make _init and _fini
6729 pasting work. */
6730 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6731 return TRUE;
6732 }
6733
6734 /* See whether we can group stub sections together. Grouping stub
6735 sections may result in fewer stubs. More importantly, we need to
6736 put all .init* and .fini* stubs at the beginning of the .init or
6737 .fini output sections respectively, because glibc splits the
6738 _init and _fini functions into multiple parts. Putting a stub in
6739 the middle of a function is not a good idea. */
6740
6741 static void
6742 group_sections (struct ppc_link_hash_table *htab,
6743 bfd_size_type stub_group_size,
6744 bfd_boolean stubs_always_before_branch)
6745 {
6746 asection **list = htab->input_list + htab->top_index;
6747 do
6748 {
6749 asection *tail = *list;
6750 while (tail != NULL)
6751 {
6752 asection *curr;
6753 asection *prev;
6754 bfd_size_type total;
6755 bfd_boolean big_sec;
6756 bfd_vma curr_toc;
6757
6758 curr = tail;
6759 total = tail->size;
6760 big_sec = total >= stub_group_size;
6761 curr_toc = htab->stub_group[tail->id].toc_off;
6762
6763 while ((prev = PREV_SEC (curr)) != NULL
6764 && ((total += curr->output_offset - prev->output_offset)
6765 < stub_group_size)
6766 && htab->stub_group[prev->id].toc_off == curr_toc)
6767 curr = prev;
6768
6769 /* OK, the size from the start of CURR to the end is less
6770 than stub_group_size and thus can be handled by one stub
6771 section. (or the tail section is itself larger than
6772 stub_group_size, in which case we may be toast.) We
6773 should really be keeping track of the total size of stubs
6774 added here, as stubs contribute to the final output
6775 section size. That's a little tricky, and this way will
6776 only break if stubs added make the total size more than
6777 2^25, ie. for the default stub_group_size, if stubs total
6778 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6779 do
6780 {
6781 prev = PREV_SEC (tail);
6782 /* Set up this stub group. */
6783 htab->stub_group[tail->id].link_sec = curr;
6784 }
6785 while (tail != curr && (tail = prev) != NULL);
6786
6787 /* But wait, there's more! Input sections up to stub_group_size
6788 bytes before the stub section can be handled by it too.
6789 Don't do this if we have a really large section after the
6790 stubs, as adding more stubs increases the chance that
6791 branches may not reach into the stub section. */
6792 if (!stubs_always_before_branch && !big_sec)
6793 {
6794 total = 0;
6795 while (prev != NULL
6796 && ((total += tail->output_offset - prev->output_offset)
6797 < stub_group_size)
6798 && htab->stub_group[prev->id].toc_off == curr_toc)
6799 {
6800 tail = prev;
6801 prev = PREV_SEC (tail);
6802 htab->stub_group[tail->id].link_sec = curr;
6803 }
6804 }
6805 tail = prev;
6806 }
6807 }
6808 while (list-- != htab->input_list);
6809 free (htab->input_list);
6810 #undef PREV_SEC
6811 }
6812
6813 /* Determine and set the size of the stub section for a final link.
6814
6815 The basic idea here is to examine all the relocations looking for
6816 PC-relative calls to a target that is unreachable with a "bl"
6817 instruction. */
6818
6819 bfd_boolean
6820 ppc64_elf_size_stubs (bfd *output_bfd,
6821 struct bfd_link_info *info,
6822 bfd_signed_vma group_size,
6823 asection *(*add_stub_section) (const char *, asection *),
6824 void (*layout_sections_again) (void))
6825 {
6826 bfd_size_type stub_group_size;
6827 bfd_boolean stubs_always_before_branch;
6828 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6829
6830 /* Stash our params away. */
6831 htab->add_stub_section = add_stub_section;
6832 htab->layout_sections_again = layout_sections_again;
6833 stubs_always_before_branch = group_size < 0;
6834 if (group_size < 0)
6835 stub_group_size = -group_size;
6836 else
6837 stub_group_size = group_size;
6838 if (stub_group_size == 1)
6839 {
6840 /* Default values. */
6841 if (stubs_always_before_branch)
6842 {
6843 stub_group_size = 0x1e00000;
6844 if (htab->has_14bit_branch)
6845 stub_group_size = 0x7800;
6846 }
6847 else
6848 {
6849 stub_group_size = 0x1c00000;
6850 if (htab->has_14bit_branch)
6851 stub_group_size = 0x7000;
6852 }
6853 }
6854
6855 group_sections (htab, stub_group_size, stubs_always_before_branch);
6856
6857 while (1)
6858 {
6859 bfd *input_bfd;
6860 unsigned int bfd_indx;
6861 asection *stub_sec;
6862 bfd_boolean stub_changed;
6863
6864 htab->stub_iteration += 1;
6865 stub_changed = FALSE;
6866
6867 for (input_bfd = info->input_bfds, bfd_indx = 0;
6868 input_bfd != NULL;
6869 input_bfd = input_bfd->link_next, bfd_indx++)
6870 {
6871 Elf_Internal_Shdr *symtab_hdr;
6872 asection *section;
6873 Elf_Internal_Sym *local_syms = NULL;
6874
6875 /* We'll need the symbol table in a second. */
6876 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6877 if (symtab_hdr->sh_info == 0)
6878 continue;
6879
6880 /* Walk over each section attached to the input bfd. */
6881 for (section = input_bfd->sections;
6882 section != NULL;
6883 section = section->next)
6884 {
6885 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6886
6887 /* If there aren't any relocs, then there's nothing more
6888 to do. */
6889 if ((section->flags & SEC_RELOC) == 0
6890 || section->reloc_count == 0)
6891 continue;
6892
6893 /* If this section is a link-once section that will be
6894 discarded, then don't create any stubs. */
6895 if (section->output_section == NULL
6896 || section->output_section->owner != output_bfd)
6897 continue;
6898
6899 /* Get the relocs. */
6900 internal_relocs
6901 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6902 info->keep_memory);
6903 if (internal_relocs == NULL)
6904 goto error_ret_free_local;
6905
6906 /* Now examine each relocation. */
6907 irela = internal_relocs;
6908 irelaend = irela + section->reloc_count;
6909 for (; irela < irelaend; irela++)
6910 {
6911 enum elf_ppc64_reloc_type r_type;
6912 unsigned int r_indx;
6913 enum ppc_stub_type stub_type;
6914 struct ppc_stub_hash_entry *stub_entry;
6915 asection *sym_sec;
6916 bfd_vma sym_value;
6917 bfd_vma destination;
6918 struct ppc_link_hash_entry *hash;
6919 struct elf_link_hash_entry *h;
6920 Elf_Internal_Sym *sym;
6921 char *stub_name;
6922 const asection *id_sec;
6923
6924 r_type = ELF64_R_TYPE (irela->r_info);
6925 r_indx = ELF64_R_SYM (irela->r_info);
6926
6927 if (r_type >= R_PPC64_max)
6928 {
6929 bfd_set_error (bfd_error_bad_value);
6930 goto error_ret_free_internal;
6931 }
6932
6933 /* Only look for stubs on branch instructions. */
6934 if (r_type != R_PPC64_REL24
6935 && r_type != R_PPC64_REL14
6936 && r_type != R_PPC64_REL14_BRTAKEN
6937 && r_type != R_PPC64_REL14_BRNTAKEN)
6938 continue;
6939
6940 /* Now determine the call target, its name, value,
6941 section. */
6942 destination = 0;
6943 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6944 r_indx, input_bfd))
6945 goto error_ret_free_internal;
6946 hash = (struct ppc_link_hash_entry *) h;
6947
6948 if (hash == NULL)
6949 {
6950 /* It's a local symbol. */
6951 sym_value = sym->st_value;
6952 destination = (sym_value + irela->r_addend
6953 + sym_sec->output_offset
6954 + sym_sec->output_section->vma);
6955 }
6956 else
6957 {
6958 /* It's an external symbol. */
6959 sym_value = 0;
6960 if (hash->elf.root.type == bfd_link_hash_defined
6961 || hash->elf.root.type == bfd_link_hash_defweak)
6962 {
6963 sym_value = hash->elf.root.u.def.value;
6964 if (sym_sec->output_section != NULL)
6965 destination = (sym_value + irela->r_addend
6966 + sym_sec->output_offset
6967 + sym_sec->output_section->vma);
6968 }
6969 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6970 ;
6971 else if (hash->elf.root.type == bfd_link_hash_undefined)
6972 ;
6973 else
6974 {
6975 bfd_set_error (bfd_error_bad_value);
6976 goto error_ret_free_internal;
6977 }
6978 }
6979
6980 /* Determine what (if any) linker stub is needed. */
6981 stub_type = ppc_type_of_stub (section, irela, &hash,
6982 destination);
6983
6984 if (stub_type != ppc_stub_plt_call)
6985 {
6986 /* Check whether we need a TOC adjusting stub.
6987 Since the linker pastes together pieces from
6988 different object files when creating the
6989 _init and _fini functions, it may be that a
6990 call to what looks like a local sym is in
6991 fact a call needing a TOC adjustment. */
6992 if (sym_sec != NULL
6993 && sym_sec->output_section != NULL
6994 && (htab->stub_group[sym_sec->id].toc_off
6995 != htab->stub_group[section->id].toc_off)
6996 && sym_sec->has_gp_reloc
6997 && section->has_gp_reloc)
6998 stub_type = ppc_stub_long_branch_r2off;
6999 }
7000
7001 if (stub_type == ppc_stub_none)
7002 continue;
7003
7004 /* __tls_get_addr calls might be eliminated. */
7005 if (stub_type != ppc_stub_plt_call
7006 && hash != NULL
7007 && &hash->elf == htab->tls_get_addr
7008 && section->has_tls_reloc
7009 && irela != internal_relocs)
7010 {
7011 /* Get tls info. */
7012 char *tls_mask;
7013
7014 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
7015 irela - 1, input_bfd))
7016 goto error_ret_free_internal;
7017 if (*tls_mask != 0)
7018 continue;
7019 }
7020
7021 /* Support for grouping stub sections. */
7022 id_sec = htab->stub_group[section->id].link_sec;
7023
7024 /* Get the name of this stub. */
7025 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
7026 if (!stub_name)
7027 goto error_ret_free_internal;
7028
7029 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
7030 stub_name, FALSE, FALSE);
7031 if (stub_entry != NULL)
7032 {
7033 /* The proper stub has already been created. */
7034 free (stub_name);
7035 continue;
7036 }
7037
7038 stub_entry = ppc_add_stub (stub_name, section, htab);
7039 if (stub_entry == NULL)
7040 {
7041 free (stub_name);
7042 error_ret_free_internal:
7043 if (elf_section_data (section)->relocs == NULL)
7044 free (internal_relocs);
7045 error_ret_free_local:
7046 if (local_syms != NULL
7047 && (symtab_hdr->contents
7048 != (unsigned char *) local_syms))
7049 free (local_syms);
7050 return FALSE;
7051 }
7052
7053 stub_entry->stub_type = stub_type;
7054 stub_entry->target_value = sym_value;
7055 stub_entry->target_section = sym_sec;
7056 stub_entry->h = hash;
7057 stub_entry->addend = irela->r_addend;
7058 stub_changed = TRUE;
7059 }
7060
7061 /* We're done with the internal relocs, free them. */
7062 if (elf_section_data (section)->relocs != internal_relocs)
7063 free (internal_relocs);
7064 }
7065
7066 if (local_syms != NULL
7067 && symtab_hdr->contents != (unsigned char *) local_syms)
7068 {
7069 if (!info->keep_memory)
7070 free (local_syms);
7071 else
7072 symtab_hdr->contents = (unsigned char *) local_syms;
7073 }
7074 }
7075
7076 if (!stub_changed)
7077 break;
7078
7079 /* OK, we've added some stubs. Find out the new size of the
7080 stub sections. */
7081 for (stub_sec = htab->stub_bfd->sections;
7082 stub_sec != NULL;
7083 stub_sec = stub_sec->next)
7084 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7085 stub_sec->size = 0;
7086
7087 htab->brlt->size = 0;
7088 if (info->shared)
7089 htab->relbrlt->size = 0;
7090
7091 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
7092
7093 /* Ask the linker to do its stuff. */
7094 (*htab->layout_sections_again) ();
7095 }
7096
7097 /* It would be nice to strip .branch_lt from the output if the
7098 section is empty, but it's too late. If we strip sections here,
7099 the dynamic symbol table is corrupted since the section symbol
7100 for the stripped section isn't written. */
7101
7102 return TRUE;
7103 }
7104
7105 /* Called after we have determined section placement. If sections
7106 move, we'll be called again. Provide a value for TOCstart. */
7107
7108 bfd_vma
7109 ppc64_elf_toc (bfd *obfd)
7110 {
7111 asection *s;
7112 bfd_vma TOCstart;
7113
7114 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7115 order. The TOC starts where the first of these sections starts. */
7116 s = bfd_get_section_by_name (obfd, ".got");
7117 if (s == NULL)
7118 s = bfd_get_section_by_name (obfd, ".toc");
7119 if (s == NULL)
7120 s = bfd_get_section_by_name (obfd, ".tocbss");
7121 if (s == NULL)
7122 s = bfd_get_section_by_name (obfd, ".plt");
7123 if (s == NULL)
7124 {
7125 /* This may happen for
7126 o references to TOC base (SYM@toc / TOC[tc0]) without a
7127 .toc directive
7128 o bad linker script
7129 o --gc-sections and empty TOC sections
7130
7131 FIXME: Warn user? */
7132
7133 /* Look for a likely section. We probably won't even be
7134 using TOCstart. */
7135 for (s = obfd->sections; s != NULL; s = s->next)
7136 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7137 == (SEC_ALLOC | SEC_SMALL_DATA))
7138 break;
7139 if (s == NULL)
7140 for (s = obfd->sections; s != NULL; s = s->next)
7141 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7142 == (SEC_ALLOC | SEC_SMALL_DATA))
7143 break;
7144 if (s == NULL)
7145 for (s = obfd->sections; s != NULL; s = s->next)
7146 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7147 break;
7148 if (s == NULL)
7149 for (s = obfd->sections; s != NULL; s = s->next)
7150 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7151 break;
7152 }
7153
7154 TOCstart = 0;
7155 if (s != NULL)
7156 TOCstart = s->output_section->vma + s->output_offset;
7157
7158 return TOCstart;
7159 }
7160
7161 /* Build all the stubs associated with the current output file.
7162 The stubs are kept in a hash table attached to the main linker
7163 hash table. This function is called via gldelf64ppc_finish. */
7164
7165 bfd_boolean
7166 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7167 struct bfd_link_info *info,
7168 char **stats)
7169 {
7170 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7171 asection *stub_sec;
7172 bfd_byte *p;
7173 int stub_sec_count = 0;
7174
7175 htab->emit_stub_syms = emit_stub_syms;
7176
7177 /* Allocate memory to hold the linker stubs. */
7178 for (stub_sec = htab->stub_bfd->sections;
7179 stub_sec != NULL;
7180 stub_sec = stub_sec->next)
7181 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
7182 && stub_sec->size != 0)
7183 {
7184 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
7185 if (stub_sec->contents == NULL)
7186 return FALSE;
7187 /* We want to check that built size is the same as calculated
7188 size. rawsize is a convenient location to use. */
7189 stub_sec->rawsize = stub_sec->size;
7190 stub_sec->size = 0;
7191 }
7192
7193 if (htab->plt != NULL)
7194 {
7195 unsigned int indx;
7196 bfd_vma plt0;
7197
7198 /* Build the .glink plt call stub. */
7199 plt0 = (htab->plt->output_section->vma
7200 + htab->plt->output_offset
7201 - (htab->glink->output_section->vma
7202 + htab->glink->output_offset
7203 + GLINK_CALL_STUB_SIZE));
7204 if (plt0 + 0x80008000 > 0xffffffff)
7205 {
7206 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7207 bfd_set_error (bfd_error_bad_value);
7208 return FALSE;
7209 }
7210
7211 if (htab->emit_stub_syms)
7212 {
7213 struct elf_link_hash_entry *h;
7214 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7215 if (h == NULL)
7216 return FALSE;
7217 if (h->root.type == bfd_link_hash_new)
7218 {
7219 h->root.type = bfd_link_hash_defined;
7220 h->root.u.def.section = htab->glink;
7221 h->root.u.def.value = 0;
7222 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7223 | ELF_LINK_HASH_DEF_REGULAR
7224 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7225 | ELF_LINK_FORCED_LOCAL);
7226 }
7227 }
7228 p = htab->glink->contents;
7229 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7230 p += 4;
7231 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7232 p += 4;
7233 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7234 p += 4;
7235 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7236 p += 4;
7237 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7238 p += 4;
7239 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7240 p += 4;
7241 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7242 p += 4;
7243 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7244 p += 4;
7245 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7246 p += 4;
7247 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7248 p += 4;
7249 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7250 p += 4;
7251 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7252 p += 4;
7253 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7254 p += 4;
7255 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7256 p += 4;
7257 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7258 p += 4;
7259 bfd_put_32 (htab->glink->owner, BCTR, p);
7260 p += 4;
7261
7262 /* Build the .glink lazy link call stubs. */
7263 indx = 0;
7264 while (p < htab->glink->contents + htab->glink->size)
7265 {
7266 if (indx < 0x8000)
7267 {
7268 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7269 p += 4;
7270 }
7271 else
7272 {
7273 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7274 p += 4;
7275 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7276 p += 4;
7277 }
7278 bfd_put_32 (htab->glink->owner,
7279 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7280 indx++;
7281 p += 4;
7282 }
7283 htab->glink->rawsize = p - htab->glink->contents;
7284 }
7285
7286 if (htab->brlt->size != 0)
7287 {
7288 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7289 htab->brlt->size);
7290 if (htab->brlt->contents == NULL)
7291 return FALSE;
7292 }
7293 if (info->shared && htab->relbrlt->size != 0)
7294 {
7295 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
7296 htab->relbrlt->size);
7297 if (htab->relbrlt->contents == NULL)
7298 return FALSE;
7299 }
7300
7301 /* Build the stubs as directed by the stub hash table. */
7302 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7303
7304 for (stub_sec = htab->stub_bfd->sections;
7305 stub_sec != NULL;
7306 stub_sec = stub_sec->next)
7307 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7308 {
7309 stub_sec_count += 1;
7310 if (stub_sec->rawsize != stub_sec->size)
7311 break;
7312 }
7313
7314 if (stub_sec != NULL
7315 || htab->glink->rawsize != htab->glink->size)
7316 {
7317 htab->stub_error = TRUE;
7318 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7319 }
7320
7321 if (htab->stub_error)
7322 return FALSE;
7323
7324 if (stats != NULL)
7325 {
7326 *stats = bfd_malloc (500);
7327 if (*stats == NULL)
7328 return FALSE;
7329
7330 sprintf (*stats, _("linker stubs in %u groups\n"
7331 " branch %lu\n"
7332 " toc adjust %lu\n"
7333 " long branch %lu\n"
7334 " long toc adj %lu\n"
7335 " plt call %lu"),
7336 stub_sec_count,
7337 htab->stub_count[ppc_stub_long_branch - 1],
7338 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7339 htab->stub_count[ppc_stub_plt_branch - 1],
7340 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7341 htab->stub_count[ppc_stub_plt_call - 1]);
7342 }
7343 return TRUE;
7344 }
7345
7346 /* The RELOCATE_SECTION function is called by the ELF backend linker
7347 to handle the relocations for a section.
7348
7349 The relocs are always passed as Rela structures; if the section
7350 actually uses Rel structures, the r_addend field will always be
7351 zero.
7352
7353 This function is responsible for adjust the section contents as
7354 necessary, and (if using Rela relocs and generating a
7355 relocatable output file) adjusting the reloc addend as
7356 necessary.
7357
7358 This function does not have to worry about setting the reloc
7359 address or the reloc symbol index.
7360
7361 LOCAL_SYMS is a pointer to the swapped in local symbols.
7362
7363 LOCAL_SECTIONS is an array giving the section in the input file
7364 corresponding to the st_shndx field of each local symbol.
7365
7366 The global hash table entry for the global symbols can be found
7367 via elf_sym_hashes (input_bfd).
7368
7369 When generating relocatable output, this function must handle
7370 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7371 going to be the section symbol corresponding to the output
7372 section, which means that the addend must be adjusted
7373 accordingly. */
7374
7375 static bfd_boolean
7376 ppc64_elf_relocate_section (bfd *output_bfd,
7377 struct bfd_link_info *info,
7378 bfd *input_bfd,
7379 asection *input_section,
7380 bfd_byte *contents,
7381 Elf_Internal_Rela *relocs,
7382 Elf_Internal_Sym *local_syms,
7383 asection **local_sections)
7384 {
7385 struct ppc_link_hash_table *htab;
7386 Elf_Internal_Shdr *symtab_hdr;
7387 struct elf_link_hash_entry **sym_hashes;
7388 Elf_Internal_Rela *rel;
7389 Elf_Internal_Rela *relend;
7390 Elf_Internal_Rela outrel;
7391 bfd_byte *loc;
7392 struct got_entry **local_got_ents;
7393 bfd_vma TOCstart;
7394 bfd_boolean ret = TRUE;
7395 bfd_boolean is_opd;
7396 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7397 bfd_boolean is_power4 = FALSE;
7398
7399 if (info->relocatable)
7400 return TRUE;
7401
7402 /* Initialize howto table if needed. */
7403 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7404 ppc_howto_init ();
7405
7406 htab = ppc_hash_table (info);
7407 local_got_ents = elf_local_got_ents (input_bfd);
7408 TOCstart = elf_gp (output_bfd);
7409 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7410 sym_hashes = elf_sym_hashes (input_bfd);
7411 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7412
7413 rel = relocs;
7414 relend = relocs + input_section->reloc_count;
7415 for (; rel < relend; rel++)
7416 {
7417 enum elf_ppc64_reloc_type r_type;
7418 bfd_vma addend;
7419 bfd_reloc_status_type r;
7420 Elf_Internal_Sym *sym;
7421 asection *sec;
7422 struct elf_link_hash_entry *h;
7423 struct elf_link_hash_entry *fdh;
7424 const char *sym_name;
7425 unsigned long r_symndx, toc_symndx;
7426 char tls_mask, tls_gd, tls_type;
7427 char sym_type;
7428 bfd_vma relocation;
7429 bfd_boolean unresolved_reloc;
7430 bfd_boolean warned;
7431 unsigned long insn, mask;
7432 struct ppc_stub_hash_entry *stub_entry;
7433 bfd_vma max_br_offset;
7434 bfd_vma from;
7435
7436 r_type = ELF64_R_TYPE (rel->r_info);
7437 r_symndx = ELF64_R_SYM (rel->r_info);
7438
7439 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7440 symbol of the previous ADDR64 reloc. The symbol gives us the
7441 proper TOC base to use. */
7442 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7443 && rel != relocs
7444 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7445 && is_opd)
7446 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7447
7448 sym = NULL;
7449 sec = NULL;
7450 h = NULL;
7451 sym_name = NULL;
7452 unresolved_reloc = FALSE;
7453 warned = FALSE;
7454
7455 if (r_symndx < symtab_hdr->sh_info)
7456 {
7457 /* It's a local symbol. */
7458 long *opd_adjust;
7459
7460 sym = local_syms + r_symndx;
7461 sec = local_sections[r_symndx];
7462 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7463 sym_type = ELF64_ST_TYPE (sym->st_info);
7464 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7465 opd_adjust = get_opd_info (sec);
7466 if (opd_adjust != NULL)
7467 {
7468 long adjust = opd_adjust[(sym->st_value + rel->r_addend) / 24];
7469 if (adjust == -1)
7470 relocation = 0;
7471 else
7472 relocation += adjust;
7473 }
7474 }
7475 else
7476 {
7477 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7478 r_symndx, symtab_hdr, sym_hashes,
7479 h, sec, relocation,
7480 unresolved_reloc, warned);
7481 sym_name = h->root.root.string;
7482 sym_type = h->type;
7483 }
7484
7485 /* TLS optimizations. Replace instruction sequences and relocs
7486 based on information we collected in tls_optimize. We edit
7487 RELOCS so that --emit-relocs will output something sensible
7488 for the final instruction stream. */
7489 tls_mask = 0;
7490 tls_gd = 0;
7491 toc_symndx = 0;
7492 if (IS_PPC64_TLS_RELOC (r_type))
7493 {
7494 if (h != NULL)
7495 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7496 else if (local_got_ents != NULL)
7497 {
7498 char *lgot_masks;
7499 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7500 tls_mask = lgot_masks[r_symndx];
7501 }
7502 if (tls_mask == 0 && r_type == R_PPC64_TLS)
7503 {
7504 /* Check for toc tls entries. */
7505 char *toc_tls;
7506
7507 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7508 rel, input_bfd))
7509 return FALSE;
7510
7511 if (toc_tls)
7512 tls_mask = *toc_tls;
7513 }
7514 }
7515
7516 /* Check that tls relocs are used with tls syms, and non-tls
7517 relocs are used with non-tls syms. */
7518 if (r_symndx != 0
7519 && r_type != R_PPC64_NONE
7520 && (h == NULL
7521 || h->root.type == bfd_link_hash_defined
7522 || h->root.type == bfd_link_hash_defweak)
7523 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7524 {
7525 if (r_type == R_PPC64_TLS && tls_mask != 0)
7526 /* R_PPC64_TLS is OK against a symbol in the TOC. */
7527 ;
7528 else
7529 (*_bfd_error_handler)
7530 (sym_type == STT_TLS
7531 ? _("%s(%s+0x%lx): %s used with TLS symbol %s")
7532 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"),
7533 bfd_archive_filename (input_bfd),
7534 input_section->name,
7535 (long) rel->r_offset,
7536 ppc64_elf_howto_table[r_type]->name,
7537 sym_name);
7538 }
7539
7540 /* Ensure reloc mapping code below stays sane. */
7541 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7542 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7543 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7544 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7545 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7546 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7547 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7548 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7549 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7550 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7551 abort ();
7552
7553 switch (r_type)
7554 {
7555 default:
7556 break;
7557
7558 case R_PPC64_TOC16:
7559 case R_PPC64_TOC16_LO:
7560 case R_PPC64_TOC16_DS:
7561 case R_PPC64_TOC16_LO_DS:
7562 {
7563 /* Check for toc tls entries. */
7564 char *toc_tls;
7565 int retval;
7566
7567 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7568 rel, input_bfd);
7569 if (retval == 0)
7570 return FALSE;
7571
7572 if (toc_tls)
7573 {
7574 tls_mask = *toc_tls;
7575 if (r_type == R_PPC64_TOC16_DS
7576 || r_type == R_PPC64_TOC16_LO_DS)
7577 {
7578 if (tls_mask != 0
7579 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7580 goto toctprel;
7581 }
7582 else
7583 {
7584 /* If we found a GD reloc pair, then we might be
7585 doing a GD->IE transition. */
7586 if (retval == 2)
7587 {
7588 tls_gd = TLS_TPRELGD;
7589 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7590 goto tls_get_addr_check;
7591 }
7592 else if (retval == 3)
7593 {
7594 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7595 goto tls_get_addr_check;
7596 }
7597 }
7598 }
7599 }
7600 break;
7601
7602 case R_PPC64_GOT_TPREL16_DS:
7603 case R_PPC64_GOT_TPREL16_LO_DS:
7604 if (tls_mask != 0
7605 && (tls_mask & TLS_TPREL) == 0)
7606 {
7607 toctprel:
7608 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7609 insn &= 31 << 21;
7610 insn |= 0x3c0d0000; /* addis 0,13,0 */
7611 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7612 r_type = R_PPC64_TPREL16_HA;
7613 if (toc_symndx != 0)
7614 {
7615 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7616 /* We changed the symbol. Start over in order to
7617 get h, sym, sec etc. right. */
7618 rel--;
7619 continue;
7620 }
7621 else
7622 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7623 }
7624 break;
7625
7626 case R_PPC64_TLS:
7627 if (tls_mask != 0
7628 && (tls_mask & TLS_TPREL) == 0)
7629 {
7630 bfd_vma rtra;
7631 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7632 if ((insn & ((0x3f << 26) | (31 << 11)))
7633 == ((31 << 26) | (13 << 11)))
7634 rtra = insn & ((1 << 26) - (1 << 16));
7635 else if ((insn & ((0x3f << 26) | (31 << 16)))
7636 == ((31 << 26) | (13 << 16)))
7637 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7638 else
7639 abort ();
7640 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7641 /* add -> addi. */
7642 insn = 14 << 26;
7643 else if ((insn & (31 << 1)) == 23 << 1
7644 && ((insn & (31 << 6)) < 14 << 6
7645 || ((insn & (31 << 6)) >= 16 << 6
7646 && (insn & (31 << 6)) < 24 << 6)))
7647 /* load and store indexed -> dform. */
7648 insn = (32 | ((insn >> 6) & 31)) << 26;
7649 else if ((insn & (31 << 1)) == 21 << 1
7650 && (insn & (0x1a << 6)) == 0)
7651 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7652 insn = (((58 | ((insn >> 6) & 4)) << 26)
7653 | ((insn >> 6) & 1));
7654 else if ((insn & (31 << 1)) == 21 << 1
7655 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7656 /* lwax -> lwa. */
7657 insn = (58 << 26) | 2;
7658 else
7659 abort ();
7660 insn |= rtra;
7661 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7662 /* Was PPC64_TLS which sits on insn boundary, now
7663 PPC64_TPREL16_LO which is at insn+2. */
7664 rel->r_offset += 2;
7665 r_type = R_PPC64_TPREL16_LO;
7666 if (toc_symndx != 0)
7667 {
7668 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7669 /* We changed the symbol. Start over in order to
7670 get h, sym, sec etc. right. */
7671 rel--;
7672 continue;
7673 }
7674 else
7675 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7676 }
7677 break;
7678
7679 case R_PPC64_GOT_TLSGD16_HI:
7680 case R_PPC64_GOT_TLSGD16_HA:
7681 tls_gd = TLS_TPRELGD;
7682 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7683 goto tls_gdld_hi;
7684 break;
7685
7686 case R_PPC64_GOT_TLSLD16_HI:
7687 case R_PPC64_GOT_TLSLD16_HA:
7688 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7689 {
7690 tls_gdld_hi:
7691 if ((tls_mask & tls_gd) != 0)
7692 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7693 + R_PPC64_GOT_TPREL16_DS);
7694 else
7695 {
7696 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7697 rel->r_offset -= 2;
7698 r_type = R_PPC64_NONE;
7699 }
7700 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7701 }
7702 break;
7703
7704 case R_PPC64_GOT_TLSGD16:
7705 case R_PPC64_GOT_TLSGD16_LO:
7706 tls_gd = TLS_TPRELGD;
7707 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7708 goto tls_get_addr_check;
7709 break;
7710
7711 case R_PPC64_GOT_TLSLD16:
7712 case R_PPC64_GOT_TLSLD16_LO:
7713 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7714 {
7715 tls_get_addr_check:
7716 if (rel + 1 < relend)
7717 {
7718 enum elf_ppc64_reloc_type r_type2;
7719 unsigned long r_symndx2;
7720 struct elf_link_hash_entry *h2;
7721 bfd_vma insn1, insn2, insn3;
7722 bfd_vma offset;
7723
7724 /* The next instruction should be a call to
7725 __tls_get_addr. Peek at the reloc to be sure. */
7726 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7727 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7728 if (r_symndx2 < symtab_hdr->sh_info
7729 || (r_type2 != R_PPC64_REL14
7730 && r_type2 != R_PPC64_REL14_BRTAKEN
7731 && r_type2 != R_PPC64_REL14_BRNTAKEN
7732 && r_type2 != R_PPC64_REL24))
7733 break;
7734
7735 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7736 while (h2->root.type == bfd_link_hash_indirect
7737 || h2->root.type == bfd_link_hash_warning)
7738 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7739 if (h2 == NULL || h2 != htab->tls_get_addr)
7740 break;
7741
7742 /* OK, it checks out. Replace the call. */
7743 offset = rel[1].r_offset;
7744 insn1 = bfd_get_32 (output_bfd,
7745 contents + rel->r_offset - 2);
7746 insn3 = bfd_get_32 (output_bfd,
7747 contents + offset + 4);
7748 if ((tls_mask & tls_gd) != 0)
7749 {
7750 /* IE */
7751 insn1 &= (1 << 26) - (1 << 2);
7752 insn1 |= 58 << 26; /* ld */
7753 insn2 = 0x7c636a14; /* add 3,3,13 */
7754 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7755 if ((tls_mask & TLS_EXPLICIT) == 0)
7756 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7757 + R_PPC64_GOT_TPREL16_DS);
7758 else
7759 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7760 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7761 }
7762 else
7763 {
7764 /* LE */
7765 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7766 insn2 = 0x38630000; /* addi 3,3,0 */
7767 if (tls_gd == 0)
7768 {
7769 /* Was an LD reloc. */
7770 r_symndx = 0;
7771 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7772 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7773 }
7774 else if (toc_symndx != 0)
7775 r_symndx = toc_symndx;
7776 r_type = R_PPC64_TPREL16_HA;
7777 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7778 rel[1].r_info = ELF64_R_INFO (r_symndx,
7779 R_PPC64_TPREL16_LO);
7780 rel[1].r_offset += 2;
7781 }
7782 if (insn3 == NOP
7783 || insn3 == CROR_151515 || insn3 == CROR_313131)
7784 {
7785 insn3 = insn2;
7786 insn2 = NOP;
7787 rel[1].r_offset += 4;
7788 }
7789 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7790 bfd_put_32 (output_bfd, insn2, contents + offset);
7791 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7792 if (tls_gd == 0 || toc_symndx != 0)
7793 {
7794 /* We changed the symbol. Start over in order
7795 to get h, sym, sec etc. right. */
7796 rel--;
7797 continue;
7798 }
7799 }
7800 }
7801 break;
7802
7803 case R_PPC64_DTPMOD64:
7804 if (rel + 1 < relend
7805 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7806 && rel[1].r_offset == rel->r_offset + 8)
7807 {
7808 if ((tls_mask & TLS_GD) == 0)
7809 {
7810 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7811 if ((tls_mask & TLS_TPRELGD) != 0)
7812 r_type = R_PPC64_TPREL64;
7813 else
7814 {
7815 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7816 r_type = R_PPC64_NONE;
7817 }
7818 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7819 }
7820 }
7821 else
7822 {
7823 if ((tls_mask & TLS_LD) == 0)
7824 {
7825 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7826 r_type = R_PPC64_NONE;
7827 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7828 }
7829 }
7830 break;
7831
7832 case R_PPC64_TPREL64:
7833 if ((tls_mask & TLS_TPREL) == 0)
7834 {
7835 r_type = R_PPC64_NONE;
7836 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7837 }
7838 break;
7839 }
7840
7841 /* Handle other relocations that tweak non-addend part of insn. */
7842 insn = 0;
7843 switch (r_type)
7844 {
7845 default:
7846 break;
7847
7848 /* Branch taken prediction relocations. */
7849 case R_PPC64_ADDR14_BRTAKEN:
7850 case R_PPC64_REL14_BRTAKEN:
7851 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7852 /* Fall thru. */
7853
7854 /* Branch not taken prediction relocations. */
7855 case R_PPC64_ADDR14_BRNTAKEN:
7856 case R_PPC64_REL14_BRNTAKEN:
7857 insn |= bfd_get_32 (output_bfd,
7858 contents + rel->r_offset) & ~(0x01 << 21);
7859 if (is_power4)
7860 {
7861 /* Set 'a' bit. This is 0b00010 in BO field for branch
7862 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7863 for branch on CTR insns (BO == 1a00t or 1a01t). */
7864 if ((insn & (0x14 << 21)) == (0x04 << 21))
7865 insn |= 0x02 << 21;
7866 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7867 insn |= 0x08 << 21;
7868 else
7869 break;
7870 }
7871 else
7872 {
7873 from = (rel->r_offset
7874 + input_section->output_offset
7875 + input_section->output_section->vma);
7876
7877 /* Invert 'y' bit if not the default. */
7878 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7879 insn ^= 0x01 << 21;
7880 }
7881
7882 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7883 break;
7884
7885 case R_PPC64_REL24:
7886 /* Calls to functions with a different TOC, such as calls to
7887 shared objects, need to alter the TOC pointer. This is
7888 done using a linkage stub. A REL24 branching to these
7889 linkage stubs needs to be followed by a nop, as the nop
7890 will be replaced with an instruction to restore the TOC
7891 base pointer. */
7892 if (((h != NULL
7893 && (fdh = &((struct ppc_link_hash_entry *) h)->oh->elf) != NULL
7894 && fdh->plt.plist != NULL)
7895 || ((fdh = h, sec) != NULL
7896 && sec->output_section != NULL
7897 && (htab->stub_group[sec->id].toc_off
7898 != htab->stub_group[input_section->id].toc_off)))
7899 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7900 rel, htab)) != NULL
7901 && (stub_entry->stub_type == ppc_stub_plt_call
7902 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7903 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7904 {
7905 bfd_boolean can_plt_call = 0;
7906
7907 if (rel->r_offset + 8 <= input_section->size)
7908 {
7909 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7910 if (insn == NOP
7911 || insn == CROR_151515 || insn == CROR_313131)
7912 {
7913 bfd_put_32 (input_bfd, LD_R2_40R1,
7914 contents + rel->r_offset + 4);
7915 can_plt_call = 1;
7916 }
7917 }
7918
7919 if (!can_plt_call)
7920 {
7921 if (stub_entry->stub_type == ppc_stub_plt_call)
7922 {
7923 /* If this is a plain branch rather than a branch
7924 and link, don't require a nop. */
7925 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7926 if ((insn & 1) == 0)
7927 can_plt_call = 1;
7928 }
7929 else if (h != NULL
7930 && strcmp (h->root.root.string,
7931 ".__libc_start_main") == 0)
7932 {
7933 /* Allow crt1 branch to go via a toc adjusting stub. */
7934 can_plt_call = 1;
7935 }
7936 else
7937 {
7938 if (strcmp (input_section->output_section->name,
7939 ".init") == 0
7940 || strcmp (input_section->output_section->name,
7941 ".fini") == 0)
7942 (*_bfd_error_handler)
7943 (_("%s(%s+0x%lx): automatic multiple TOCs "
7944 "not supported using your crt files; "
7945 "recompile with -mminimal-toc or upgrade gcc"),
7946 bfd_archive_filename (input_bfd),
7947 input_section->name,
7948 (long) rel->r_offset);
7949 else
7950 (*_bfd_error_handler)
7951 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7952 "does not allow automatic multiple TOCs; "
7953 "recompile with -mminimal-toc or "
7954 "-fno-optimize-sibling-calls, "
7955 "or make `%s' extern"),
7956 bfd_archive_filename (input_bfd),
7957 input_section->name,
7958 (long) rel->r_offset,
7959 sym_name,
7960 sym_name);
7961 bfd_set_error (bfd_error_bad_value);
7962 ret = FALSE;
7963 }
7964 }
7965
7966 if (can_plt_call)
7967 {
7968 relocation = (stub_entry->stub_offset
7969 + stub_entry->stub_sec->output_offset
7970 + stub_entry->stub_sec->output_section->vma);
7971 if (stub_entry->stub_type == ppc_stub_plt_call)
7972 unresolved_reloc = FALSE;
7973 }
7974 }
7975
7976 /* NOP out calls to undefined weak functions.
7977 We can thus call a weak function without first
7978 checking whether the function is defined. */
7979 if (h != NULL
7980 && h->root.type == bfd_link_hash_undefweak
7981 && relocation == 0
7982 && rel->r_addend == 0)
7983 {
7984 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7985 continue;
7986 }
7987 break;
7988 }
7989
7990 /* Set `addend'. */
7991 tls_type = 0;
7992 addend = rel->r_addend;
7993 switch (r_type)
7994 {
7995 default:
7996 (*_bfd_error_handler)
7997 (_("%s: unknown relocation type %d for symbol %s"),
7998 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
7999
8000 bfd_set_error (bfd_error_bad_value);
8001 ret = FALSE;
8002 continue;
8003
8004 case R_PPC64_NONE:
8005 case R_PPC64_TLS:
8006 case R_PPC64_GNU_VTINHERIT:
8007 case R_PPC64_GNU_VTENTRY:
8008 continue;
8009
8010 /* GOT16 relocations. Like an ADDR16 using the symbol's
8011 address in the GOT as relocation value instead of the
8012 symbol's value itself. Also, create a GOT entry for the
8013 symbol and put the symbol value there. */
8014 case R_PPC64_GOT_TLSGD16:
8015 case R_PPC64_GOT_TLSGD16_LO:
8016 case R_PPC64_GOT_TLSGD16_HI:
8017 case R_PPC64_GOT_TLSGD16_HA:
8018 tls_type = TLS_TLS | TLS_GD;
8019 goto dogot;
8020
8021 case R_PPC64_GOT_TLSLD16:
8022 case R_PPC64_GOT_TLSLD16_LO:
8023 case R_PPC64_GOT_TLSLD16_HI:
8024 case R_PPC64_GOT_TLSLD16_HA:
8025 tls_type = TLS_TLS | TLS_LD;
8026 goto dogot;
8027
8028 case R_PPC64_GOT_TPREL16_DS:
8029 case R_PPC64_GOT_TPREL16_LO_DS:
8030 case R_PPC64_GOT_TPREL16_HI:
8031 case R_PPC64_GOT_TPREL16_HA:
8032 tls_type = TLS_TLS | TLS_TPREL;
8033 goto dogot;
8034
8035 case R_PPC64_GOT_DTPREL16_DS:
8036 case R_PPC64_GOT_DTPREL16_LO_DS:
8037 case R_PPC64_GOT_DTPREL16_HI:
8038 case R_PPC64_GOT_DTPREL16_HA:
8039 tls_type = TLS_TLS | TLS_DTPREL;
8040 goto dogot;
8041
8042 case R_PPC64_GOT16:
8043 case R_PPC64_GOT16_LO:
8044 case R_PPC64_GOT16_HI:
8045 case R_PPC64_GOT16_HA:
8046 case R_PPC64_GOT16_DS:
8047 case R_PPC64_GOT16_LO_DS:
8048 dogot:
8049 {
8050 /* Relocation is to the entry for this symbol in the global
8051 offset table. */
8052 asection *got;
8053 bfd_vma *offp;
8054 bfd_vma off;
8055 unsigned long indx = 0;
8056
8057 if (tls_type == (TLS_TLS | TLS_LD)
8058 && (h == NULL
8059 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
8060 offp = &ppc64_tlsld_got (input_bfd)->offset;
8061 else
8062 {
8063 struct got_entry *ent;
8064
8065 if (h != NULL)
8066 {
8067 bfd_boolean dyn = htab->elf.dynamic_sections_created;
8068 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8069 || (info->shared
8070 && SYMBOL_REFERENCES_LOCAL (info, h)))
8071 /* This is actually a static link, or it is a
8072 -Bsymbolic link and the symbol is defined
8073 locally, or the symbol was forced to be local
8074 because of a version file. */
8075 ;
8076 else
8077 {
8078 indx = h->dynindx;
8079 unresolved_reloc = FALSE;
8080 }
8081 ent = h->got.glist;
8082 }
8083 else
8084 {
8085 if (local_got_ents == NULL)
8086 abort ();
8087 ent = local_got_ents[r_symndx];
8088 }
8089
8090 for (; ent != NULL; ent = ent->next)
8091 if (ent->addend == rel->r_addend
8092 && ent->owner == input_bfd
8093 && ent->tls_type == tls_type)
8094 break;
8095 if (ent == NULL)
8096 abort ();
8097 offp = &ent->got.offset;
8098 }
8099
8100 got = ppc64_elf_tdata (input_bfd)->got;
8101 if (got == NULL)
8102 abort ();
8103
8104 /* The offset must always be a multiple of 8. We use the
8105 least significant bit to record whether we have already
8106 processed this entry. */
8107 off = *offp;
8108 if ((off & 1) != 0)
8109 off &= ~1;
8110 else
8111 {
8112 /* Generate relocs for the dynamic linker, except in
8113 the case of TLSLD where we'll use one entry per
8114 module. */
8115 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
8116
8117 *offp = off | 1;
8118 if ((info->shared || indx != 0)
8119 && (h == NULL
8120 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8121 || h->root.type != bfd_link_hash_undefweak))
8122 {
8123 outrel.r_offset = (got->output_section->vma
8124 + got->output_offset
8125 + off);
8126 outrel.r_addend = rel->r_addend;
8127 if (tls_type & (TLS_LD | TLS_GD))
8128 {
8129 outrel.r_addend = 0;
8130 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8131 if (tls_type == (TLS_TLS | TLS_GD))
8132 {
8133 loc = relgot->contents;
8134 loc += (relgot->reloc_count++
8135 * sizeof (Elf64_External_Rela));
8136 bfd_elf64_swap_reloca_out (output_bfd,
8137 &outrel, loc);
8138 outrel.r_offset += 8;
8139 outrel.r_addend = rel->r_addend;
8140 outrel.r_info
8141 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8142 }
8143 }
8144 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8145 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8146 else if (tls_type == (TLS_TLS | TLS_TPREL))
8147 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8148 else if (indx == 0)
8149 {
8150 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8151
8152 /* Write the .got section contents for the sake
8153 of prelink. */
8154 loc = got->contents + off;
8155 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8156 loc);
8157 }
8158 else
8159 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8160
8161 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8162 {
8163 outrel.r_addend += relocation;
8164 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8165 outrel.r_addend -= htab->elf.tls_sec->vma;
8166 }
8167 loc = relgot->contents;
8168 loc += (relgot->reloc_count++
8169 * sizeof (Elf64_External_Rela));
8170 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8171 }
8172
8173 /* Init the .got section contents here if we're not
8174 emitting a reloc. */
8175 else
8176 {
8177 relocation += rel->r_addend;
8178 if (tls_type == (TLS_TLS | TLS_LD))
8179 relocation = 1;
8180 else if (tls_type != 0)
8181 {
8182 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
8183 if (tls_type == (TLS_TLS | TLS_TPREL))
8184 relocation += DTP_OFFSET - TP_OFFSET;
8185
8186 if (tls_type == (TLS_TLS | TLS_GD))
8187 {
8188 bfd_put_64 (output_bfd, relocation,
8189 got->contents + off + 8);
8190 relocation = 1;
8191 }
8192 }
8193
8194 bfd_put_64 (output_bfd, relocation,
8195 got->contents + off);
8196 }
8197 }
8198
8199 if (off >= (bfd_vma) -2)
8200 abort ();
8201
8202 relocation = got->output_offset + off;
8203
8204 /* TOC base (r2) is TOC start plus 0x8000. */
8205 addend = -TOC_BASE_OFF;
8206 }
8207 break;
8208
8209 case R_PPC64_PLT16_HA:
8210 case R_PPC64_PLT16_HI:
8211 case R_PPC64_PLT16_LO:
8212 case R_PPC64_PLT32:
8213 case R_PPC64_PLT64:
8214 /* Relocation is to the entry for this symbol in the
8215 procedure linkage table. */
8216
8217 /* Resolve a PLT reloc against a local symbol directly,
8218 without using the procedure linkage table. */
8219 if (h == NULL)
8220 break;
8221
8222 /* It's possible that we didn't make a PLT entry for this
8223 symbol. This happens when statically linking PIC code,
8224 or when using -Bsymbolic. Go find a match if there is a
8225 PLT entry. */
8226 if (htab->plt != NULL)
8227 {
8228 struct plt_entry *ent;
8229 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8230 if (ent->addend == rel->r_addend
8231 && ent->plt.offset != (bfd_vma) -1)
8232 {
8233 relocation = (htab->plt->output_section->vma
8234 + htab->plt->output_offset
8235 + ent->plt.offset);
8236 unresolved_reloc = FALSE;
8237 }
8238 }
8239 break;
8240
8241 case R_PPC64_TOC:
8242 /* Relocation value is TOC base. */
8243 relocation = TOCstart;
8244 if (r_symndx == 0)
8245 relocation += htab->stub_group[input_section->id].toc_off;
8246 else if (unresolved_reloc)
8247 ;
8248 else if (sec != NULL && sec->id <= htab->top_id)
8249 relocation += htab->stub_group[sec->id].toc_off;
8250 else
8251 unresolved_reloc = TRUE;
8252 goto dodyn2;
8253
8254 /* TOC16 relocs. We want the offset relative to the TOC base,
8255 which is the address of the start of the TOC plus 0x8000.
8256 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8257 in this order. */
8258 case R_PPC64_TOC16:
8259 case R_PPC64_TOC16_LO:
8260 case R_PPC64_TOC16_HI:
8261 case R_PPC64_TOC16_DS:
8262 case R_PPC64_TOC16_LO_DS:
8263 case R_PPC64_TOC16_HA:
8264 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8265 break;
8266
8267 /* Relocate against the beginning of the section. */
8268 case R_PPC64_SECTOFF:
8269 case R_PPC64_SECTOFF_LO:
8270 case R_PPC64_SECTOFF_HI:
8271 case R_PPC64_SECTOFF_DS:
8272 case R_PPC64_SECTOFF_LO_DS:
8273 case R_PPC64_SECTOFF_HA:
8274 if (sec != NULL)
8275 addend -= sec->output_section->vma;
8276 break;
8277
8278 case R_PPC64_REL14:
8279 case R_PPC64_REL14_BRNTAKEN:
8280 case R_PPC64_REL14_BRTAKEN:
8281 case R_PPC64_REL24:
8282 break;
8283
8284 case R_PPC64_TPREL16:
8285 case R_PPC64_TPREL16_LO:
8286 case R_PPC64_TPREL16_HI:
8287 case R_PPC64_TPREL16_HA:
8288 case R_PPC64_TPREL16_DS:
8289 case R_PPC64_TPREL16_LO_DS:
8290 case R_PPC64_TPREL16_HIGHER:
8291 case R_PPC64_TPREL16_HIGHERA:
8292 case R_PPC64_TPREL16_HIGHEST:
8293 case R_PPC64_TPREL16_HIGHESTA:
8294 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8295 if (info->shared)
8296 /* The TPREL16 relocs shouldn't really be used in shared
8297 libs as they will result in DT_TEXTREL being set, but
8298 support them anyway. */
8299 goto dodyn;
8300 break;
8301
8302 case R_PPC64_DTPREL16:
8303 case R_PPC64_DTPREL16_LO:
8304 case R_PPC64_DTPREL16_HI:
8305 case R_PPC64_DTPREL16_HA:
8306 case R_PPC64_DTPREL16_DS:
8307 case R_PPC64_DTPREL16_LO_DS:
8308 case R_PPC64_DTPREL16_HIGHER:
8309 case R_PPC64_DTPREL16_HIGHERA:
8310 case R_PPC64_DTPREL16_HIGHEST:
8311 case R_PPC64_DTPREL16_HIGHESTA:
8312 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8313 break;
8314
8315 case R_PPC64_DTPMOD64:
8316 relocation = 1;
8317 addend = 0;
8318 goto dodyn;
8319
8320 case R_PPC64_TPREL64:
8321 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8322 goto dodyn;
8323
8324 case R_PPC64_DTPREL64:
8325 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8326 /* Fall thru */
8327
8328 /* Relocations that may need to be propagated if this is a
8329 dynamic object. */
8330 case R_PPC64_REL30:
8331 case R_PPC64_REL32:
8332 case R_PPC64_REL64:
8333 case R_PPC64_ADDR14:
8334 case R_PPC64_ADDR14_BRNTAKEN:
8335 case R_PPC64_ADDR14_BRTAKEN:
8336 case R_PPC64_ADDR16:
8337 case R_PPC64_ADDR16_DS:
8338 case R_PPC64_ADDR16_HA:
8339 case R_PPC64_ADDR16_HI:
8340 case R_PPC64_ADDR16_HIGHER:
8341 case R_PPC64_ADDR16_HIGHERA:
8342 case R_PPC64_ADDR16_HIGHEST:
8343 case R_PPC64_ADDR16_HIGHESTA:
8344 case R_PPC64_ADDR16_LO:
8345 case R_PPC64_ADDR16_LO_DS:
8346 case R_PPC64_ADDR24:
8347 case R_PPC64_ADDR32:
8348 case R_PPC64_ADDR64:
8349 case R_PPC64_UADDR16:
8350 case R_PPC64_UADDR32:
8351 case R_PPC64_UADDR64:
8352 /* r_symndx will be zero only for relocs against symbols
8353 from removed linkonce sections, or sections discarded by
8354 a linker script. */
8355 dodyn:
8356 if (r_symndx == 0)
8357 break;
8358 /* Fall thru. */
8359
8360 dodyn2:
8361 if ((input_section->flags & SEC_ALLOC) == 0)
8362 break;
8363
8364 if (NO_OPD_RELOCS && is_opd)
8365 break;
8366
8367 if ((info->shared
8368 && (h == NULL
8369 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8370 || h->root.type != bfd_link_hash_undefweak)
8371 && (MUST_BE_DYN_RELOC (r_type)
8372 || !SYMBOL_CALLS_LOCAL (info, h)))
8373 || (ELIMINATE_COPY_RELOCS
8374 && !info->shared
8375 && h != NULL
8376 && h->dynindx != -1
8377 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8378 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8379 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8380 {
8381 Elf_Internal_Rela outrel;
8382 bfd_boolean skip, relocate;
8383 asection *sreloc;
8384 bfd_byte *loc;
8385 bfd_vma out_off;
8386
8387 /* When generating a dynamic object, these relocations
8388 are copied into the output file to be resolved at run
8389 time. */
8390
8391 skip = FALSE;
8392 relocate = FALSE;
8393
8394 out_off = _bfd_elf_section_offset (output_bfd, info,
8395 input_section, rel->r_offset);
8396 if (out_off == (bfd_vma) -1)
8397 skip = TRUE;
8398 else if (out_off == (bfd_vma) -2)
8399 skip = TRUE, relocate = TRUE;
8400 out_off += (input_section->output_section->vma
8401 + input_section->output_offset);
8402 outrel.r_offset = out_off;
8403 outrel.r_addend = rel->r_addend;
8404
8405 /* Optimize unaligned reloc use. */
8406 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8407 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8408 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8409 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8410 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8411 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8412 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8413 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8414 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8415
8416 if (skip)
8417 memset (&outrel, 0, sizeof outrel);
8418 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8419 && !is_opd
8420 && r_type != R_PPC64_TOC)
8421 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8422 else
8423 {
8424 /* This symbol is local, or marked to become local,
8425 or this is an opd section reloc which must point
8426 at a local function. */
8427 outrel.r_addend += relocation;
8428 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8429 {
8430 if (is_opd && h != NULL)
8431 {
8432 /* Lie about opd entries. This case occurs
8433 when building shared libraries and we
8434 reference a function in another shared
8435 lib. The same thing happens for a weak
8436 definition in an application that's
8437 overridden by a strong definition in a
8438 shared lib. (I believe this is a generic
8439 bug in binutils handling of weak syms.)
8440 In these cases we won't use the opd
8441 entry in this lib. */
8442 unresolved_reloc = FALSE;
8443 }
8444 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8445
8446 /* We need to relocate .opd contents for ld.so.
8447 Prelink also wants simple and consistent rules
8448 for relocs. This make all RELATIVE relocs have
8449 *r_offset equal to r_addend. */
8450 relocate = TRUE;
8451 }
8452 else
8453 {
8454 long indx = 0;
8455
8456 if (bfd_is_abs_section (sec))
8457 ;
8458 else if (sec == NULL || sec->owner == NULL)
8459 {
8460 bfd_set_error (bfd_error_bad_value);
8461 return FALSE;
8462 }
8463 else
8464 {
8465 asection *osec;
8466
8467 osec = sec->output_section;
8468 indx = elf_section_data (osec)->dynindx;
8469
8470 /* We are turning this relocation into one
8471 against a section symbol, so subtract out
8472 the output section's address but not the
8473 offset of the input section in the output
8474 section. */
8475 outrel.r_addend -= osec->vma;
8476 }
8477
8478 outrel.r_info = ELF64_R_INFO (indx, r_type);
8479 }
8480 }
8481
8482 sreloc = elf_section_data (input_section)->sreloc;
8483 if (sreloc == NULL)
8484 abort ();
8485
8486 loc = sreloc->contents;
8487 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8488 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8489
8490 /* If this reloc is against an external symbol, it will
8491 be computed at runtime, so there's no need to do
8492 anything now. However, for the sake of prelink ensure
8493 that the section contents are a known value. */
8494 if (! relocate)
8495 {
8496 unresolved_reloc = FALSE;
8497 /* The value chosen here is quite arbitrary as ld.so
8498 ignores section contents except for the special
8499 case of .opd where the contents might be accessed
8500 before relocation. Choose zero, as that won't
8501 cause reloc overflow. */
8502 relocation = 0;
8503 addend = 0;
8504 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8505 to improve backward compatibility with older
8506 versions of ld. */
8507 if (r_type == R_PPC64_ADDR64)
8508 addend = outrel.r_addend;
8509 /* Adjust pc_relative relocs to have zero in *r_offset. */
8510 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8511 addend = (input_section->output_section->vma
8512 + input_section->output_offset
8513 + rel->r_offset);
8514 }
8515 }
8516 break;
8517
8518 case R_PPC64_COPY:
8519 case R_PPC64_GLOB_DAT:
8520 case R_PPC64_JMP_SLOT:
8521 case R_PPC64_RELATIVE:
8522 /* We shouldn't ever see these dynamic relocs in relocatable
8523 files. */
8524 /* Fall through. */
8525
8526 case R_PPC64_PLTGOT16:
8527 case R_PPC64_PLTGOT16_DS:
8528 case R_PPC64_PLTGOT16_HA:
8529 case R_PPC64_PLTGOT16_HI:
8530 case R_PPC64_PLTGOT16_LO:
8531 case R_PPC64_PLTGOT16_LO_DS:
8532 case R_PPC64_PLTREL32:
8533 case R_PPC64_PLTREL64:
8534 /* These ones haven't been implemented yet. */
8535
8536 (*_bfd_error_handler)
8537 (_("%s: relocation %s is not supported for symbol %s."),
8538 bfd_archive_filename (input_bfd),
8539 ppc64_elf_howto_table[r_type]->name, sym_name);
8540
8541 bfd_set_error (bfd_error_invalid_operation);
8542 ret = FALSE;
8543 continue;
8544 }
8545
8546 /* Do any further special processing. */
8547 switch (r_type)
8548 {
8549 default:
8550 break;
8551
8552 case R_PPC64_ADDR16_HA:
8553 case R_PPC64_ADDR16_HIGHERA:
8554 case R_PPC64_ADDR16_HIGHESTA:
8555 case R_PPC64_GOT16_HA:
8556 case R_PPC64_PLTGOT16_HA:
8557 case R_PPC64_PLT16_HA:
8558 case R_PPC64_TOC16_HA:
8559 case R_PPC64_SECTOFF_HA:
8560 case R_PPC64_TPREL16_HA:
8561 case R_PPC64_DTPREL16_HA:
8562 case R_PPC64_GOT_TLSGD16_HA:
8563 case R_PPC64_GOT_TLSLD16_HA:
8564 case R_PPC64_GOT_TPREL16_HA:
8565 case R_PPC64_GOT_DTPREL16_HA:
8566 case R_PPC64_TPREL16_HIGHER:
8567 case R_PPC64_TPREL16_HIGHERA:
8568 case R_PPC64_TPREL16_HIGHEST:
8569 case R_PPC64_TPREL16_HIGHESTA:
8570 case R_PPC64_DTPREL16_HIGHER:
8571 case R_PPC64_DTPREL16_HIGHERA:
8572 case R_PPC64_DTPREL16_HIGHEST:
8573 case R_PPC64_DTPREL16_HIGHESTA:
8574 /* It's just possible that this symbol is a weak symbol
8575 that's not actually defined anywhere. In that case,
8576 'sec' would be NULL, and we should leave the symbol
8577 alone (it will be set to zero elsewhere in the link). */
8578 if (sec != NULL)
8579 /* Add 0x10000 if sign bit in 0:15 is set.
8580 Bits 0:15 are not used. */
8581 addend += 0x8000;
8582 break;
8583
8584 case R_PPC64_ADDR16_DS:
8585 case R_PPC64_ADDR16_LO_DS:
8586 case R_PPC64_GOT16_DS:
8587 case R_PPC64_GOT16_LO_DS:
8588 case R_PPC64_PLT16_LO_DS:
8589 case R_PPC64_SECTOFF_DS:
8590 case R_PPC64_SECTOFF_LO_DS:
8591 case R_PPC64_TOC16_DS:
8592 case R_PPC64_TOC16_LO_DS:
8593 case R_PPC64_PLTGOT16_DS:
8594 case R_PPC64_PLTGOT16_LO_DS:
8595 case R_PPC64_GOT_TPREL16_DS:
8596 case R_PPC64_GOT_TPREL16_LO_DS:
8597 case R_PPC64_GOT_DTPREL16_DS:
8598 case R_PPC64_GOT_DTPREL16_LO_DS:
8599 case R_PPC64_TPREL16_DS:
8600 case R_PPC64_TPREL16_LO_DS:
8601 case R_PPC64_DTPREL16_DS:
8602 case R_PPC64_DTPREL16_LO_DS:
8603 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8604 mask = 3;
8605 /* If this reloc is against an lq insn, then the value must be
8606 a multiple of 16. This is somewhat of a hack, but the
8607 "correct" way to do this by defining _DQ forms of all the
8608 _DS relocs bloats all reloc switches in this file. It
8609 doesn't seem to make much sense to use any of these relocs
8610 in data, so testing the insn should be safe. */
8611 if ((insn & (0x3f << 26)) == (56u << 26))
8612 mask = 15;
8613 if (((relocation + addend) & mask) != 0)
8614 {
8615 (*_bfd_error_handler)
8616 (_("%s: error: relocation %s not a multiple of %d"),
8617 bfd_archive_filename (input_bfd),
8618 ppc64_elf_howto_table[r_type]->name,
8619 mask + 1);
8620 bfd_set_error (bfd_error_bad_value);
8621 ret = FALSE;
8622 continue;
8623 }
8624 break;
8625
8626 case R_PPC64_REL14:
8627 case R_PPC64_REL14_BRNTAKEN:
8628 case R_PPC64_REL14_BRTAKEN:
8629 max_br_offset = 1 << 15;
8630 goto branch_check;
8631
8632 case R_PPC64_REL24:
8633 max_br_offset = 1 << 25;
8634
8635 branch_check:
8636 /* If the branch is out of reach or the TOC register needs
8637 adjusting, then redirect the call to the local stub for
8638 this function. */
8639 from = (rel->r_offset
8640 + input_section->output_offset
8641 + input_section->output_section->vma);
8642 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8643 || (sec != NULL
8644 && sec->output_section != NULL
8645 && sec->id <= htab->top_id
8646 && (htab->stub_group[sec->id].toc_off
8647 != htab->stub_group[input_section->id].toc_off)))
8648 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8649 rel, htab)) != NULL)
8650 {
8651 /* Munge up the value and addend so that we call the stub
8652 rather than the procedure directly. */
8653 relocation = (stub_entry->stub_offset
8654 + stub_entry->stub_sec->output_offset
8655 + stub_entry->stub_sec->output_section->vma);
8656 addend = 0;
8657 }
8658 break;
8659 }
8660
8661 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8662 because such sections are not SEC_ALLOC and thus ld.so will
8663 not process them. */
8664 if (unresolved_reloc
8665 && !((input_section->flags & SEC_DEBUGGING) != 0
8666 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8667 {
8668 (*_bfd_error_handler)
8669 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8670 bfd_archive_filename (input_bfd),
8671 bfd_get_section_name (input_bfd, input_section),
8672 (long) rel->r_offset,
8673 ppc64_elf_howto_table[(int) r_type]->name,
8674 h->root.root.string);
8675 ret = FALSE;
8676 }
8677
8678 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8679 input_bfd,
8680 input_section,
8681 contents,
8682 rel->r_offset,
8683 relocation,
8684 addend);
8685
8686 if (r != bfd_reloc_ok)
8687 {
8688 if (sym_name == NULL)
8689 sym_name = "(null)";
8690 if (r == bfd_reloc_overflow)
8691 {
8692 if (warned)
8693 continue;
8694 if (h != NULL
8695 && h->root.type == bfd_link_hash_undefweak
8696 && ppc64_elf_howto_table[r_type]->pc_relative)
8697 {
8698 /* Assume this is a call protected by other code that
8699 detects the symbol is undefined. If this is the case,
8700 we can safely ignore the overflow. If not, the
8701 program is hosed anyway, and a little warning isn't
8702 going to help. */
8703
8704 continue;
8705 }
8706
8707 if (!((*info->callbacks->reloc_overflow)
8708 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8709 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8710 return FALSE;
8711 }
8712 else
8713 {
8714 (*_bfd_error_handler)
8715 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8716 bfd_archive_filename (input_bfd),
8717 bfd_get_section_name (input_bfd, input_section),
8718 (long) rel->r_offset,
8719 ppc64_elf_howto_table[r_type]->name,
8720 sym_name,
8721 (int) r);
8722 ret = FALSE;
8723 }
8724 }
8725 }
8726
8727 return ret;
8728 }
8729
8730 /* Adjust the value of any local symbols in opd sections. */
8731
8732 static bfd_boolean
8733 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
8734 const char *name ATTRIBUTE_UNUSED,
8735 Elf_Internal_Sym *elfsym,
8736 asection *input_sec,
8737 struct elf_link_hash_entry *h)
8738 {
8739 long *opd_adjust, adjust;
8740 bfd_vma value;
8741
8742 if (h != NULL)
8743 return TRUE;
8744
8745 opd_adjust = get_opd_info (input_sec);
8746 if (opd_adjust == NULL)
8747 return TRUE;
8748
8749 value = elfsym->st_value - input_sec->output_offset;
8750 if (!info->relocatable)
8751 value -= input_sec->output_section->vma;
8752
8753 adjust = opd_adjust[value / 24];
8754 if (adjust == -1)
8755 elfsym->st_value = 0;
8756 else
8757 elfsym->st_value += adjust;
8758 return TRUE;
8759 }
8760
8761 /* Finish up dynamic symbol handling. We set the contents of various
8762 dynamic sections here. */
8763
8764 static bfd_boolean
8765 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8766 struct bfd_link_info *info,
8767 struct elf_link_hash_entry *h,
8768 Elf_Internal_Sym *sym)
8769 {
8770 struct ppc_link_hash_table *htab;
8771 bfd *dynobj;
8772
8773 htab = ppc_hash_table (info);
8774 dynobj = htab->elf.dynobj;
8775
8776 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8777 {
8778 struct plt_entry *ent;
8779 Elf_Internal_Rela rela;
8780 bfd_byte *loc;
8781
8782 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8783 if (ent->plt.offset != (bfd_vma) -1)
8784 {
8785 /* This symbol has an entry in the procedure linkage
8786 table. Set it up. */
8787
8788 if (htab->plt == NULL
8789 || htab->relplt == NULL
8790 || htab->glink == NULL)
8791 abort ();
8792
8793 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8794 fill in the PLT entry. */
8795 rela.r_offset = (htab->plt->output_section->vma
8796 + htab->plt->output_offset
8797 + ent->plt.offset);
8798 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8799 rela.r_addend = ent->addend;
8800
8801 loc = htab->relplt->contents;
8802 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8803 * sizeof (Elf64_External_Rela));
8804 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8805 }
8806 }
8807
8808 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8809 {
8810 Elf_Internal_Rela rela;
8811 bfd_byte *loc;
8812
8813 /* This symbol needs a copy reloc. Set it up. */
8814
8815 if (h->dynindx == -1
8816 || (h->root.type != bfd_link_hash_defined
8817 && h->root.type != bfd_link_hash_defweak)
8818 || htab->relbss == NULL)
8819 abort ();
8820
8821 rela.r_offset = (h->root.u.def.value
8822 + h->root.u.def.section->output_section->vma
8823 + h->root.u.def.section->output_offset);
8824 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8825 rela.r_addend = 0;
8826 loc = htab->relbss->contents;
8827 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8828 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8829 }
8830
8831 /* Mark some specially defined symbols as absolute. */
8832 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8833 sym->st_shndx = SHN_ABS;
8834
8835 return TRUE;
8836 }
8837
8838 /* Used to decide how to sort relocs in an optimal manner for the
8839 dynamic linker, before writing them out. */
8840
8841 static enum elf_reloc_type_class
8842 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8843 {
8844 enum elf_ppc64_reloc_type r_type;
8845
8846 r_type = ELF64_R_TYPE (rela->r_info);
8847 switch (r_type)
8848 {
8849 case R_PPC64_RELATIVE:
8850 return reloc_class_relative;
8851 case R_PPC64_JMP_SLOT:
8852 return reloc_class_plt;
8853 case R_PPC64_COPY:
8854 return reloc_class_copy;
8855 default:
8856 return reloc_class_normal;
8857 }
8858 }
8859
8860 /* Finish up the dynamic sections. */
8861
8862 static bfd_boolean
8863 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8864 struct bfd_link_info *info)
8865 {
8866 struct ppc_link_hash_table *htab;
8867 bfd *dynobj;
8868 asection *sdyn;
8869
8870 htab = ppc_hash_table (info);
8871 dynobj = htab->elf.dynobj;
8872 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8873
8874 if (htab->elf.dynamic_sections_created)
8875 {
8876 Elf64_External_Dyn *dyncon, *dynconend;
8877
8878 if (sdyn == NULL || htab->got == NULL)
8879 abort ();
8880
8881 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8882 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
8883 for (; dyncon < dynconend; dyncon++)
8884 {
8885 Elf_Internal_Dyn dyn;
8886 asection *s;
8887
8888 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8889
8890 switch (dyn.d_tag)
8891 {
8892 default:
8893 continue;
8894
8895 case DT_PPC64_GLINK:
8896 s = htab->glink;
8897 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8898 /* We stupidly defined DT_PPC64_GLINK to be the start
8899 of glink rather than the first entry point, which is
8900 what ld.so needs, and now have a bigger stub to
8901 support automatic multiple TOCs. */
8902 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8903 break;
8904
8905 case DT_PPC64_OPD:
8906 s = bfd_get_section_by_name (output_bfd, ".opd");
8907 if (s == NULL)
8908 continue;
8909 dyn.d_un.d_ptr = s->vma;
8910 break;
8911
8912 case DT_PPC64_OPDSZ:
8913 s = bfd_get_section_by_name (output_bfd, ".opd");
8914 if (s == NULL)
8915 continue;
8916 dyn.d_un.d_val = s->size;
8917 break;
8918
8919 case DT_PLTGOT:
8920 s = htab->plt;
8921 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8922 break;
8923
8924 case DT_JMPREL:
8925 s = htab->relplt;
8926 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8927 break;
8928
8929 case DT_PLTRELSZ:
8930 dyn.d_un.d_val = htab->relplt->size;
8931 break;
8932
8933 case DT_RELASZ:
8934 /* Don't count procedure linkage table relocs in the
8935 overall reloc count. */
8936 s = htab->relplt;
8937 if (s == NULL)
8938 continue;
8939 dyn.d_un.d_val -= s->size;
8940 break;
8941
8942 case DT_RELA:
8943 /* We may not be using the standard ELF linker script.
8944 If .rela.plt is the first .rela section, we adjust
8945 DT_RELA to not include it. */
8946 s = htab->relplt;
8947 if (s == NULL)
8948 continue;
8949 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8950 continue;
8951 dyn.d_un.d_ptr += s->size;
8952 break;
8953 }
8954
8955 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8956 }
8957 }
8958
8959 if (htab->got != NULL && htab->got->size != 0)
8960 {
8961 /* Fill in the first entry in the global offset table.
8962 We use it to hold the link-time TOCbase. */
8963 bfd_put_64 (output_bfd,
8964 elf_gp (output_bfd) + TOC_BASE_OFF,
8965 htab->got->contents);
8966
8967 /* Set .got entry size. */
8968 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8969 }
8970
8971 if (htab->plt != NULL && htab->plt->size != 0)
8972 {
8973 /* Set .plt entry size. */
8974 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8975 = PLT_ENTRY_SIZE;
8976 }
8977
8978 /* We need to handle writing out multiple GOT sections ourselves,
8979 since we didn't add them to DYNOBJ. */
8980 while ((dynobj = dynobj->link_next) != NULL)
8981 {
8982 asection *s;
8983 s = ppc64_elf_tdata (dynobj)->got;
8984 if (s != NULL
8985 && s->size != 0
8986 && s->output_section != bfd_abs_section_ptr
8987 && !bfd_set_section_contents (output_bfd, s->output_section,
8988 s->contents, s->output_offset,
8989 s->size))
8990 return FALSE;
8991 s = ppc64_elf_tdata (dynobj)->relgot;
8992 if (s != NULL
8993 && s->size != 0
8994 && s->output_section != bfd_abs_section_ptr
8995 && !bfd_set_section_contents (output_bfd, s->output_section,
8996 s->contents, s->output_offset,
8997 s->size))
8998 return FALSE;
8999 }
9000
9001 return TRUE;
9002 }
9003
9004 #include "elf64-target.h"