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* elf64-ppc.c (elf_backend_add_symbol_hook): Define.
[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, raw_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 raw_size = 384;
2399
2400 /* Make a ".reg/999" section. */
2401 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2402 raw_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 \f
2496 /* The following functions are specific to the ELF linker, while
2497 functions above are used generally. Those named ppc64_elf_* are
2498 called by the main ELF linker code. They appear in this file more
2499 or less in the order in which they are called. eg.
2500 ppc64_elf_check_relocs is called early in the link process,
2501 ppc64_elf_finish_dynamic_sections is one of the last functions
2502 called.
2503
2504 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2505 functions have both a function code symbol and a function descriptor
2506 symbol. A call to foo in a relocatable object file looks like:
2507
2508 . .text
2509 . x:
2510 . bl .foo
2511 . nop
2512
2513 The function definition in another object file might be:
2514
2515 . .section .opd
2516 . foo: .quad .foo
2517 . .quad .TOC.@tocbase
2518 . .quad 0
2519 .
2520 . .text
2521 . .foo: blr
2522
2523 When the linker resolves the call during a static link, the branch
2524 unsurprisingly just goes to .foo and the .opd information is unused.
2525 If the function definition is in a shared library, things are a little
2526 different: The call goes via a plt call stub, the opd information gets
2527 copied to the plt, and the linker patches the nop.
2528
2529 . x:
2530 . bl .foo_stub
2531 . ld 2,40(1)
2532 .
2533 .
2534 . .foo_stub:
2535 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2536 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2537 . std 2,40(1) # this is the general idea
2538 . ld 11,0(12)
2539 . ld 2,8(12)
2540 . mtctr 11
2541 . ld 11,16(12)
2542 . bctr
2543 .
2544 . .section .plt
2545 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2546
2547 The "reloc ()" notation is supposed to indicate that the linker emits
2548 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2549 copying.
2550
2551 What are the difficulties here? Well, firstly, the relocations
2552 examined by the linker in check_relocs are against the function code
2553 sym .foo, while the dynamic relocation in the plt is emitted against
2554 the function descriptor symbol, foo. Somewhere along the line, we need
2555 to carefully copy dynamic link information from one symbol to the other.
2556 Secondly, the generic part of the elf linker will make .foo a dynamic
2557 symbol as is normal for most other backends. We need foo dynamic
2558 instead, at least for an application final link. However, when
2559 creating a shared library containing foo, we need to have both symbols
2560 dynamic so that references to .foo are satisfied during the early
2561 stages of linking. Otherwise the linker might decide to pull in a
2562 definition from some other object, eg. a static library. */
2563
2564 /* The linker needs to keep track of the number of relocs that it
2565 decides to copy as dynamic relocs in check_relocs for each symbol.
2566 This is so that it can later discard them if they are found to be
2567 unnecessary. We store the information in a field extending the
2568 regular ELF linker hash table. */
2569
2570 struct ppc_dyn_relocs
2571 {
2572 struct ppc_dyn_relocs *next;
2573
2574 /* The input section of the reloc. */
2575 asection *sec;
2576
2577 /* Total number of relocs copied for the input section. */
2578 bfd_size_type count;
2579
2580 /* Number of pc-relative relocs copied for the input section. */
2581 bfd_size_type pc_count;
2582 };
2583
2584 /* Track GOT entries needed for a given symbol. We might need more
2585 than one got entry per symbol. */
2586 struct got_entry
2587 {
2588 struct got_entry *next;
2589
2590 /* The symbol addend that we'll be placing in the GOT. */
2591 bfd_vma addend;
2592
2593 /* Unlike other ELF targets, we use separate GOT entries for the same
2594 symbol referenced from different input files. This is to support
2595 automatic multiple TOC/GOT sections, where the TOC base can vary
2596 from one input file to another.
2597
2598 Point to the BFD owning this GOT entry. */
2599 bfd *owner;
2600
2601 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2602 TLS_TPREL or TLS_DTPREL for tls entries. */
2603 char tls_type;
2604
2605 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2606 union
2607 {
2608 bfd_signed_vma refcount;
2609 bfd_vma offset;
2610 } got;
2611 };
2612
2613 /* The same for PLT. */
2614 struct plt_entry
2615 {
2616 struct plt_entry *next;
2617
2618 bfd_vma addend;
2619
2620 union
2621 {
2622 bfd_signed_vma refcount;
2623 bfd_vma offset;
2624 } plt;
2625 };
2626
2627 /* Of those relocs that might be copied as dynamic relocs, this macro
2628 selects those that must be copied when linking a shared library,
2629 even when the symbol is local. */
2630
2631 #define MUST_BE_DYN_RELOC(RTYPE) \
2632 ((RTYPE) != R_PPC64_REL32 \
2633 && (RTYPE) != R_PPC64_REL64 \
2634 && (RTYPE) != R_PPC64_REL30)
2635
2636 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2637 copying dynamic variables from a shared lib into an app's dynbss
2638 section, and instead use a dynamic relocation to point into the
2639 shared lib. With code that gcc generates, it's vital that this be
2640 enabled; In the PowerPC64 ABI, the address of a function is actually
2641 the address of a function descriptor, which resides in the .opd
2642 section. gcc uses the descriptor directly rather than going via the
2643 GOT as some other ABI's do, which means that initialized function
2644 pointers must reference the descriptor. Thus, a function pointer
2645 initialized to the address of a function in a shared library will
2646 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2647 redefines the function descriptor symbol to point to the copy. This
2648 presents a problem as a plt entry for that function is also
2649 initialized from the function descriptor symbol and the copy reloc
2650 may not be initialized first. */
2651 #define ELIMINATE_COPY_RELOCS 1
2652
2653 /* Section name for stubs is the associated section name plus this
2654 string. */
2655 #define STUB_SUFFIX ".stub"
2656
2657 /* Linker stubs.
2658 ppc_stub_long_branch:
2659 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2660 destination, but a 24 bit branch in a stub section will reach.
2661 . b dest
2662
2663 ppc_stub_plt_branch:
2664 Similar to the above, but a 24 bit branch in the stub section won't
2665 reach its destination.
2666 . addis %r12,%r2,xxx@toc@ha
2667 . ld %r11,xxx@toc@l(%r12)
2668 . mtctr %r11
2669 . bctr
2670
2671 ppc_stub_plt_call:
2672 Used to call a function in a shared library.
2673 . addis %r12,%r2,xxx@toc@ha
2674 . std %r2,40(%r1)
2675 . ld %r11,xxx+0@toc@l(%r12)
2676 . ld %r2,xxx+8@toc@l(%r12)
2677 . mtctr %r11
2678 . ld %r11,xxx+16@toc@l(%r12)
2679 . bctr
2680
2681 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2682 code to adjust the value and save r2 to support multiple toc sections.
2683 A ppc_stub_long_branch with an r2 offset looks like:
2684 . std %r2,40(%r1)
2685 . addis %r2,%r2,off@ha
2686 . addi %r2,%r2,off@l
2687 . b dest
2688
2689 A ppc_stub_plt_branch with an r2 offset looks like:
2690 . std %r2,40(%r1)
2691 . addis %r12,%r2,xxx@toc@ha
2692 . ld %r11,xxx@toc@l(%r12)
2693 . addis %r2,%r2,off@ha
2694 . addi %r2,%r2,off@l
2695 . mtctr %r11
2696 . bctr
2697 */
2698
2699 enum ppc_stub_type {
2700 ppc_stub_none,
2701 ppc_stub_long_branch,
2702 ppc_stub_long_branch_r2off,
2703 ppc_stub_plt_branch,
2704 ppc_stub_plt_branch_r2off,
2705 ppc_stub_plt_call
2706 };
2707
2708 struct ppc_stub_hash_entry {
2709
2710 /* Base hash table entry structure. */
2711 struct bfd_hash_entry root;
2712
2713 enum ppc_stub_type stub_type;
2714
2715 /* The stub section. */
2716 asection *stub_sec;
2717
2718 /* Offset within stub_sec of the beginning of this stub. */
2719 bfd_vma stub_offset;
2720
2721 /* Given the symbol's value and its section we can determine its final
2722 value when building the stubs (so the stub knows where to jump. */
2723 bfd_vma target_value;
2724 asection *target_section;
2725
2726 /* The symbol table entry, if any, that this was derived from. */
2727 struct ppc_link_hash_entry *h;
2728
2729 /* And the reloc addend that this was derived from. */
2730 bfd_vma addend;
2731
2732 /* Where this stub is being called from, or, in the case of combined
2733 stub sections, the first input section in the group. */
2734 asection *id_sec;
2735 };
2736
2737 struct ppc_branch_hash_entry {
2738
2739 /* Base hash table entry structure. */
2740 struct bfd_hash_entry root;
2741
2742 /* Offset within .branch_lt. */
2743 unsigned int offset;
2744
2745 /* Generation marker. */
2746 unsigned int iter;
2747 };
2748
2749 struct ppc_link_hash_entry
2750 {
2751 struct elf_link_hash_entry elf;
2752
2753 /* A pointer to the most recently used stub hash entry against this
2754 symbol. */
2755 struct ppc_stub_hash_entry *stub_cache;
2756
2757 /* Track dynamic relocs copied for this symbol. */
2758 struct ppc_dyn_relocs *dyn_relocs;
2759
2760 /* Link between function code and descriptor symbols. */
2761 struct elf_link_hash_entry *oh;
2762
2763 /* Flag function code and descriptor symbols. */
2764 unsigned int is_func:1;
2765 unsigned int is_func_descriptor:1;
2766 unsigned int is_entry:1;
2767
2768 /* Whether global opd sym has been adjusted or not. */
2769 unsigned int adjust_done:1;
2770
2771 /* Contexts in which symbol is used in the GOT (or TOC).
2772 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2773 corresponding relocs are encountered during check_relocs.
2774 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2775 indicate the corresponding GOT entry type is not needed.
2776 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2777 a TPREL one. We use a separate flag rather than setting TPREL
2778 just for convenience in distinguishing the two cases. */
2779 #define TLS_GD 1 /* GD reloc. */
2780 #define TLS_LD 2 /* LD reloc. */
2781 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2782 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2783 #define TLS_TLS 16 /* Any TLS reloc. */
2784 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2785 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2786 char tls_mask;
2787 };
2788
2789 /* ppc64 ELF linker hash table. */
2790
2791 struct ppc_link_hash_table
2792 {
2793 struct elf_link_hash_table elf;
2794
2795 /* The stub hash table. */
2796 struct bfd_hash_table stub_hash_table;
2797
2798 /* Another hash table for plt_branch stubs. */
2799 struct bfd_hash_table branch_hash_table;
2800
2801 /* Linker stub bfd. */
2802 bfd *stub_bfd;
2803
2804 /* Linker call-backs. */
2805 asection * (*add_stub_section) (const char *, asection *);
2806 void (*layout_sections_again) (void);
2807
2808 /* Array to keep track of which stub sections have been created, and
2809 information on stub grouping. */
2810 struct map_stub {
2811 /* This is the section to which stubs in the group will be attached. */
2812 asection *link_sec;
2813 /* The stub section. */
2814 asection *stub_sec;
2815 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2816 bfd_vma toc_off;
2817 } *stub_group;
2818
2819 /* Support for multiple toc sections. */
2820 unsigned int no_multi_toc;
2821 unsigned int multi_toc_needed;
2822
2823 /* Temp used when calculating TOC pointers. */
2824 bfd_vma toc_curr;
2825
2826 /* Highest input section id. */
2827 int top_id;
2828
2829 /* Highest output section index. */
2830 int top_index;
2831
2832 /* List of input sections for each output section. */
2833 asection **input_list;
2834
2835 /* Short-cuts to get to dynamic linker sections. */
2836 asection *got;
2837 asection *plt;
2838 asection *relplt;
2839 asection *dynbss;
2840 asection *relbss;
2841 asection *glink;
2842 asection *sfpr;
2843 asection *brlt;
2844 asection *relbrlt;
2845
2846 /* Shortcut to .__tls_get_addr. */
2847 struct elf_link_hash_entry *tls_get_addr;
2848
2849 /* Statistics. */
2850 unsigned long stub_count[ppc_stub_plt_call];
2851
2852 /* Set if we should emit symbols for stubs. */
2853 unsigned int emit_stub_syms;
2854
2855 /* Set on error. */
2856 unsigned int stub_error;
2857
2858 /* Flag set when small branches are detected. Used to
2859 select suitable defaults for the stub group size. */
2860 unsigned int has_14bit_branch;
2861
2862 /* Set if we detect a reference undefined weak symbol. */
2863 unsigned int have_undefweak;
2864
2865 /* Incremented every time we size stubs. */
2866 unsigned int stub_iteration;
2867
2868 /* Small local sym to section mapping cache. */
2869 struct sym_sec_cache sym_sec;
2870 };
2871
2872 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2873
2874 #define ppc_hash_table(p) \
2875 ((struct ppc_link_hash_table *) ((p)->hash))
2876
2877 #define ppc_stub_hash_lookup(table, string, create, copy) \
2878 ((struct ppc_stub_hash_entry *) \
2879 bfd_hash_lookup ((table), (string), (create), (copy)))
2880
2881 #define ppc_branch_hash_lookup(table, string, create, copy) \
2882 ((struct ppc_branch_hash_entry *) \
2883 bfd_hash_lookup ((table), (string), (create), (copy)))
2884
2885 /* Create an entry in the stub hash table. */
2886
2887 static struct bfd_hash_entry *
2888 stub_hash_newfunc (struct bfd_hash_entry *entry,
2889 struct bfd_hash_table *table,
2890 const char *string)
2891 {
2892 /* Allocate the structure if it has not already been allocated by a
2893 subclass. */
2894 if (entry == NULL)
2895 {
2896 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2897 if (entry == NULL)
2898 return entry;
2899 }
2900
2901 /* Call the allocation method of the superclass. */
2902 entry = bfd_hash_newfunc (entry, table, string);
2903 if (entry != NULL)
2904 {
2905 struct ppc_stub_hash_entry *eh;
2906
2907 /* Initialize the local fields. */
2908 eh = (struct ppc_stub_hash_entry *) entry;
2909 eh->stub_type = ppc_stub_none;
2910 eh->stub_sec = NULL;
2911 eh->stub_offset = 0;
2912 eh->target_value = 0;
2913 eh->target_section = NULL;
2914 eh->h = NULL;
2915 eh->id_sec = NULL;
2916 }
2917
2918 return entry;
2919 }
2920
2921 /* Create an entry in the branch hash table. */
2922
2923 static struct bfd_hash_entry *
2924 branch_hash_newfunc (struct bfd_hash_entry *entry,
2925 struct bfd_hash_table *table,
2926 const char *string)
2927 {
2928 /* Allocate the structure if it has not already been allocated by a
2929 subclass. */
2930 if (entry == NULL)
2931 {
2932 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2933 if (entry == NULL)
2934 return entry;
2935 }
2936
2937 /* Call the allocation method of the superclass. */
2938 entry = bfd_hash_newfunc (entry, table, string);
2939 if (entry != NULL)
2940 {
2941 struct ppc_branch_hash_entry *eh;
2942
2943 /* Initialize the local fields. */
2944 eh = (struct ppc_branch_hash_entry *) entry;
2945 eh->offset = 0;
2946 eh->iter = 0;
2947 }
2948
2949 return entry;
2950 }
2951
2952 /* Create an entry in a ppc64 ELF linker hash table. */
2953
2954 static struct bfd_hash_entry *
2955 link_hash_newfunc (struct bfd_hash_entry *entry,
2956 struct bfd_hash_table *table,
2957 const char *string)
2958 {
2959 /* Allocate the structure if it has not already been allocated by a
2960 subclass. */
2961 if (entry == NULL)
2962 {
2963 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2964 if (entry == NULL)
2965 return entry;
2966 }
2967
2968 /* Call the allocation method of the superclass. */
2969 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2970 if (entry != NULL)
2971 {
2972 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2973
2974 eh->stub_cache = NULL;
2975 eh->dyn_relocs = NULL;
2976 eh->oh = NULL;
2977 eh->is_func = 0;
2978 eh->is_func_descriptor = 0;
2979 eh->is_entry = 0;
2980 eh->adjust_done = 0;
2981 eh->tls_mask = 0;
2982 }
2983
2984 return entry;
2985 }
2986
2987 /* Create a ppc64 ELF linker hash table. */
2988
2989 static struct bfd_link_hash_table *
2990 ppc64_elf_link_hash_table_create (bfd *abfd)
2991 {
2992 struct ppc_link_hash_table *htab;
2993 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2994
2995 htab = bfd_zmalloc (amt);
2996 if (htab == NULL)
2997 return NULL;
2998
2999 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
3000 {
3001 free (htab);
3002 return NULL;
3003 }
3004
3005 /* Init the stub hash table too. */
3006 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3007 return NULL;
3008
3009 /* And the branch hash table. */
3010 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3011 return NULL;
3012
3013 /* Initializing two fields of the union is just cosmetic. We really
3014 only care about glist, but when compiled on a 32-bit host the
3015 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3016 debugger inspection of these fields look nicer. */
3017 htab->elf.init_refcount.refcount = 0;
3018 htab->elf.init_refcount.glist = NULL;
3019 htab->elf.init_offset.offset = 0;
3020 htab->elf.init_offset.glist = NULL;
3021
3022 return &htab->elf.root;
3023 }
3024
3025 /* Free the derived linker hash table. */
3026
3027 static void
3028 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3029 {
3030 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3031
3032 bfd_hash_table_free (&ret->stub_hash_table);
3033 bfd_hash_table_free (&ret->branch_hash_table);
3034 _bfd_generic_link_hash_table_free (hash);
3035 }
3036
3037 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3038
3039 void
3040 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3041 {
3042 struct ppc_link_hash_table *htab;
3043
3044 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3045
3046 /* Always hook our dynamic sections into the first bfd, which is the
3047 linker created stub bfd. This ensures that the GOT header is at
3048 the start of the output TOC section. */
3049 htab = ppc_hash_table (info);
3050 htab->stub_bfd = abfd;
3051 htab->elf.dynobj = abfd;
3052 }
3053
3054 /* Build a name for an entry in the stub hash table. */
3055
3056 static char *
3057 ppc_stub_name (const asection *input_section,
3058 const asection *sym_sec,
3059 const struct ppc_link_hash_entry *h,
3060 const Elf_Internal_Rela *rel)
3061 {
3062 char *stub_name;
3063 bfd_size_type len;
3064
3065 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3066 offsets from a sym as a branch target? In fact, we could
3067 probably assume the addend is always zero. */
3068 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3069
3070 if (h)
3071 {
3072 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3073 stub_name = bfd_malloc (len);
3074 if (stub_name != NULL)
3075 {
3076 sprintf (stub_name, "%08x.%s+%x",
3077 input_section->id & 0xffffffff,
3078 h->elf.root.root.string,
3079 (int) rel->r_addend & 0xffffffff);
3080 }
3081 }
3082 else
3083 {
3084 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3085 stub_name = bfd_malloc (len);
3086 if (stub_name != NULL)
3087 {
3088 sprintf (stub_name, "%08x.%x:%x+%x",
3089 input_section->id & 0xffffffff,
3090 sym_sec->id & 0xffffffff,
3091 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3092 (int) rel->r_addend & 0xffffffff);
3093 }
3094 }
3095 return stub_name;
3096 }
3097
3098 /* Look up an entry in the stub hash. Stub entries are cached because
3099 creating the stub name takes a bit of time. */
3100
3101 static struct ppc_stub_hash_entry *
3102 ppc_get_stub_entry (const asection *input_section,
3103 const asection *sym_sec,
3104 struct elf_link_hash_entry *hash,
3105 const Elf_Internal_Rela *rel,
3106 struct ppc_link_hash_table *htab)
3107 {
3108 struct ppc_stub_hash_entry *stub_entry;
3109 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3110 const asection *id_sec;
3111
3112 /* If this input section is part of a group of sections sharing one
3113 stub section, then use the id of the first section in the group.
3114 Stub names need to include a section id, as there may well be
3115 more than one stub used to reach say, printf, and we need to
3116 distinguish between them. */
3117 id_sec = htab->stub_group[input_section->id].link_sec;
3118
3119 if (h != NULL && h->stub_cache != NULL
3120 && h->stub_cache->h == h
3121 && h->stub_cache->id_sec == id_sec)
3122 {
3123 stub_entry = h->stub_cache;
3124 }
3125 else
3126 {
3127 char *stub_name;
3128
3129 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3130 if (stub_name == NULL)
3131 return NULL;
3132
3133 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3134 stub_name, FALSE, FALSE);
3135 if (h != NULL)
3136 h->stub_cache = stub_entry;
3137
3138 free (stub_name);
3139 }
3140
3141 return stub_entry;
3142 }
3143
3144 /* Add a new stub entry to the stub hash. Not all fields of the new
3145 stub entry are initialised. */
3146
3147 static struct ppc_stub_hash_entry *
3148 ppc_add_stub (const char *stub_name,
3149 asection *section,
3150 struct ppc_link_hash_table *htab)
3151 {
3152 asection *link_sec;
3153 asection *stub_sec;
3154 struct ppc_stub_hash_entry *stub_entry;
3155
3156 link_sec = htab->stub_group[section->id].link_sec;
3157 stub_sec = htab->stub_group[section->id].stub_sec;
3158 if (stub_sec == NULL)
3159 {
3160 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3161 if (stub_sec == NULL)
3162 {
3163 size_t namelen;
3164 bfd_size_type len;
3165 char *s_name;
3166
3167 namelen = strlen (link_sec->name);
3168 len = namelen + sizeof (STUB_SUFFIX);
3169 s_name = bfd_alloc (htab->stub_bfd, len);
3170 if (s_name == NULL)
3171 return NULL;
3172
3173 memcpy (s_name, link_sec->name, namelen);
3174 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3175 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3176 if (stub_sec == NULL)
3177 return NULL;
3178 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3179 }
3180 htab->stub_group[section->id].stub_sec = stub_sec;
3181 }
3182
3183 /* Enter this entry into the linker stub hash table. */
3184 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3185 TRUE, FALSE);
3186 if (stub_entry == NULL)
3187 {
3188 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3189 bfd_archive_filename (section->owner),
3190 stub_name);
3191 return NULL;
3192 }
3193
3194 stub_entry->stub_sec = stub_sec;
3195 stub_entry->stub_offset = 0;
3196 stub_entry->id_sec = link_sec;
3197 return stub_entry;
3198 }
3199
3200 /* Create sections for linker generated code. */
3201
3202 static bfd_boolean
3203 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3204 {
3205 struct ppc_link_hash_table *htab;
3206 flagword flags;
3207
3208 htab = ppc_hash_table (info);
3209
3210 /* Create .sfpr for code to save and restore fp regs. */
3211 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3212 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3213 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3214 if (htab->sfpr == NULL
3215 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3216 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3217 return FALSE;
3218
3219 /* Create .glink for lazy dynamic linking support. */
3220 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3221 if (htab->glink == NULL
3222 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3223 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3224 return FALSE;
3225
3226 /* Create .branch_lt for plt_branch stubs. */
3227 flags = (SEC_ALLOC | SEC_LOAD
3228 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3229 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3230 if (htab->brlt == NULL
3231 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3232 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3233 return FALSE;
3234
3235 if (info->shared)
3236 {
3237 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3238 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3239 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3240 if (!htab->relbrlt
3241 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3242 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3243 return FALSE;
3244 }
3245 return TRUE;
3246 }
3247
3248 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3249 not already done. */
3250
3251 static bfd_boolean
3252 create_got_section (bfd *abfd, struct bfd_link_info *info)
3253 {
3254 asection *got, *relgot;
3255 flagword flags;
3256 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3257
3258 if (!htab->got)
3259 {
3260 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3261 return FALSE;
3262
3263 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3264 if (!htab->got)
3265 abort ();
3266 }
3267
3268 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3269 | SEC_LINKER_CREATED);
3270
3271 got = bfd_make_section (abfd, ".got");
3272 if (!got
3273 || !bfd_set_section_flags (abfd, got, flags)
3274 || !bfd_set_section_alignment (abfd, got, 3))
3275 return FALSE;
3276
3277 relgot = bfd_make_section (abfd, ".rela.got");
3278 if (!relgot
3279 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3280 || ! bfd_set_section_alignment (abfd, relgot, 3))
3281 return FALSE;
3282
3283 ppc64_elf_tdata (abfd)->got = got;
3284 ppc64_elf_tdata (abfd)->relgot = relgot;
3285 return TRUE;
3286 }
3287
3288 /* Create the dynamic sections, and set up shortcuts. */
3289
3290 static bfd_boolean
3291 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3292 {
3293 struct ppc_link_hash_table *htab;
3294
3295 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3296 return FALSE;
3297
3298 htab = ppc_hash_table (info);
3299 if (!htab->got)
3300 htab->got = bfd_get_section_by_name (dynobj, ".got");
3301 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3302 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3303 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3304 if (!info->shared)
3305 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3306
3307 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3308 || (!info->shared && !htab->relbss))
3309 abort ();
3310
3311 return TRUE;
3312 }
3313
3314 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3315
3316 static void
3317 ppc64_elf_copy_indirect_symbol
3318 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3319 struct elf_link_hash_entry *dir,
3320 struct elf_link_hash_entry *ind)
3321 {
3322 struct ppc_link_hash_entry *edir, *eind;
3323 flagword mask;
3324
3325 edir = (struct ppc_link_hash_entry *) dir;
3326 eind = (struct ppc_link_hash_entry *) ind;
3327
3328 /* Copy over any dynamic relocs we may have on the indirect sym. */
3329 if (eind->dyn_relocs != NULL)
3330 {
3331 if (edir->dyn_relocs != NULL)
3332 {
3333 struct ppc_dyn_relocs **pp;
3334 struct ppc_dyn_relocs *p;
3335
3336 if (eind->elf.root.type == bfd_link_hash_indirect)
3337 abort ();
3338
3339 /* Add reloc counts against the weak sym to the strong sym
3340 list. Merge any entries against the same section. */
3341 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3342 {
3343 struct ppc_dyn_relocs *q;
3344
3345 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3346 if (q->sec == p->sec)
3347 {
3348 q->pc_count += p->pc_count;
3349 q->count += p->count;
3350 *pp = p->next;
3351 break;
3352 }
3353 if (q == NULL)
3354 pp = &p->next;
3355 }
3356 *pp = edir->dyn_relocs;
3357 }
3358
3359 edir->dyn_relocs = eind->dyn_relocs;
3360 eind->dyn_relocs = NULL;
3361 }
3362
3363 edir->is_func |= eind->is_func;
3364 edir->is_func_descriptor |= eind->is_func_descriptor;
3365 edir->is_entry |= eind->is_entry;
3366 edir->tls_mask |= eind->tls_mask;
3367
3368 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3369 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3370 | ELF_LINK_HASH_NEEDS_PLT);
3371 /* If called to transfer flags for a weakdef during processing
3372 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3373 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3374 if (ELIMINATE_COPY_RELOCS
3375 && eind->elf.root.type != bfd_link_hash_indirect
3376 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3377 mask &= ~ELF_LINK_NON_GOT_REF;
3378
3379 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3380
3381 /* If we were called to copy over info for a weak sym, that's all. */
3382 if (eind->elf.root.type != bfd_link_hash_indirect)
3383 return;
3384
3385 /* Copy over got entries that we may have already seen to the
3386 symbol which just became indirect. */
3387 if (eind->elf.got.glist != NULL)
3388 {
3389 if (edir->elf.got.glist != NULL)
3390 {
3391 struct got_entry **entp;
3392 struct got_entry *ent;
3393
3394 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3395 {
3396 struct got_entry *dent;
3397
3398 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3399 if (dent->addend == ent->addend
3400 && dent->owner == ent->owner
3401 && dent->tls_type == ent->tls_type)
3402 {
3403 dent->got.refcount += ent->got.refcount;
3404 *entp = ent->next;
3405 break;
3406 }
3407 if (dent == NULL)
3408 entp = &ent->next;
3409 }
3410 *entp = edir->elf.got.glist;
3411 }
3412
3413 edir->elf.got.glist = eind->elf.got.glist;
3414 eind->elf.got.glist = NULL;
3415 }
3416
3417 /* And plt entries. */
3418 if (eind->elf.plt.plist != NULL)
3419 {
3420 if (edir->elf.plt.plist != NULL)
3421 {
3422 struct plt_entry **entp;
3423 struct plt_entry *ent;
3424
3425 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3426 {
3427 struct plt_entry *dent;
3428
3429 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3430 if (dent->addend == ent->addend)
3431 {
3432 dent->plt.refcount += ent->plt.refcount;
3433 *entp = ent->next;
3434 break;
3435 }
3436 if (dent == NULL)
3437 entp = &ent->next;
3438 }
3439 *entp = edir->elf.plt.plist;
3440 }
3441
3442 edir->elf.plt.plist = eind->elf.plt.plist;
3443 eind->elf.plt.plist = NULL;
3444 }
3445
3446 if (edir->elf.dynindx == -1)
3447 {
3448 edir->elf.dynindx = eind->elf.dynindx;
3449 edir->elf.dynstr_index = eind->elf.dynstr_index;
3450 eind->elf.dynindx = -1;
3451 eind->elf.dynstr_index = 0;
3452 }
3453 else
3454 BFD_ASSERT (eind->elf.dynindx == -1);
3455 }
3456
3457 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3458 symbols undefined on the command-line. */
3459
3460 bfd_boolean
3461 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3462 {
3463 struct ppc_link_hash_table *htab;
3464 struct bfd_sym_chain *sym;
3465
3466 htab = ppc_hash_table (info);
3467 for (sym = info->gc_sym_list; sym; sym = sym->next)
3468 {
3469 struct elf_link_hash_entry *h;
3470
3471 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3472 if (h != NULL)
3473 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3474 }
3475 return TRUE;
3476 }
3477
3478 /* Hack symbols defined in .opd sections to be function type. */
3479
3480 static bfd_boolean
3481 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
3482 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3483 Elf_Internal_Sym *isym,
3484 const char **name ATTRIBUTE_UNUSED,
3485 flagword *flags ATTRIBUTE_UNUSED,
3486 asection **sec,
3487 bfd_vma *value ATTRIBUTE_UNUSED)
3488 {
3489 if (strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
3490 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
3491 return TRUE;
3492 }
3493
3494 static bfd_boolean
3495 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3496 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3497 {
3498 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3499 char *local_got_tls_masks;
3500
3501 if (local_got_ents == NULL)
3502 {
3503 bfd_size_type size = symtab_hdr->sh_info;
3504
3505 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3506 local_got_ents = bfd_zalloc (abfd, size);
3507 if (local_got_ents == NULL)
3508 return FALSE;
3509 elf_local_got_ents (abfd) = local_got_ents;
3510 }
3511
3512 if ((tls_type & TLS_EXPLICIT) == 0)
3513 {
3514 struct got_entry *ent;
3515
3516 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3517 if (ent->addend == r_addend
3518 && ent->owner == abfd
3519 && ent->tls_type == tls_type)
3520 break;
3521 if (ent == NULL)
3522 {
3523 bfd_size_type amt = sizeof (*ent);
3524 ent = bfd_alloc (abfd, amt);
3525 if (ent == NULL)
3526 return FALSE;
3527 ent->next = local_got_ents[r_symndx];
3528 ent->addend = r_addend;
3529 ent->owner = abfd;
3530 ent->tls_type = tls_type;
3531 ent->got.refcount = 0;
3532 local_got_ents[r_symndx] = ent;
3533 }
3534 ent->got.refcount += 1;
3535 }
3536
3537 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3538 local_got_tls_masks[r_symndx] |= tls_type;
3539 return TRUE;
3540 }
3541
3542 static bfd_boolean
3543 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3544 {
3545 struct plt_entry *ent;
3546
3547 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3548 if (ent->addend == addend)
3549 break;
3550 if (ent == NULL)
3551 {
3552 bfd_size_type amt = sizeof (*ent);
3553 ent = bfd_alloc (abfd, amt);
3554 if (ent == NULL)
3555 return FALSE;
3556 ent->next = eh->elf.plt.plist;
3557 ent->addend = addend;
3558 ent->plt.refcount = 0;
3559 eh->elf.plt.plist = ent;
3560 }
3561 ent->plt.refcount += 1;
3562 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3563 eh->is_func = 1;
3564 return TRUE;
3565 }
3566
3567 /* Find the function descriptor hash entry from the given function code
3568 hash entry FH. Link the entries via their OH fields. */
3569 static struct ppc_link_hash_entry *
3570 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3571 {
3572 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3573
3574 if (fdh == NULL)
3575 {
3576 const char *fd_name = fh->elf.root.root.string + 1;
3577
3578 fdh = (struct ppc_link_hash_entry *)
3579 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3580 if (fdh != NULL)
3581 {
3582 fdh->is_func_descriptor = 1;
3583 fdh->oh = &fh->elf;
3584 fh->is_func = 1;
3585 fh->oh = &fdh->elf;
3586 }
3587 }
3588
3589 return fdh;
3590 }
3591
3592 /* Look through the relocs for a section during the first phase, and
3593 calculate needed space in the global offset table, procedure
3594 linkage table, and dynamic reloc sections. */
3595
3596 static bfd_boolean
3597 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3598 asection *sec, const Elf_Internal_Rela *relocs)
3599 {
3600 struct ppc_link_hash_table *htab;
3601 Elf_Internal_Shdr *symtab_hdr;
3602 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3603 const Elf_Internal_Rela *rel;
3604 const Elf_Internal_Rela *rel_end;
3605 asection *sreloc;
3606 asection **opd_sym_map;
3607
3608 if (info->relocatable)
3609 return TRUE;
3610
3611 /* Don't do anything special with non-loaded, non-alloced sections.
3612 In particular, any relocs in such sections should not affect GOT
3613 and PLT reference counting (ie. we don't allow them to create GOT
3614 or PLT entries), there's no possibility or desire to optimize TLS
3615 relocs, and there's not much point in propagating relocs to shared
3616 libs that the dynamic linker won't relocate. */
3617 if ((sec->flags & SEC_ALLOC) == 0)
3618 return TRUE;
3619
3620 htab = ppc_hash_table (info);
3621 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3622
3623 sym_hashes = elf_sym_hashes (abfd);
3624 sym_hashes_end = (sym_hashes
3625 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3626 - symtab_hdr->sh_info);
3627
3628 sreloc = NULL;
3629 opd_sym_map = NULL;
3630 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3631 {
3632 /* Garbage collection needs some extra help with .opd sections.
3633 We don't want to necessarily keep everything referenced by
3634 relocs in .opd, as that would keep all functions. Instead,
3635 if we reference an .opd symbol (a function descriptor), we
3636 want to keep the function code symbol's section. This is
3637 easy for global symbols, but for local syms we need to keep
3638 information about the associated function section. Later, if
3639 edit_opd deletes entries, we'll use this array to adjust
3640 local syms in .opd. */
3641 union opd_info {
3642 asection *func_section;
3643 long entry_adjust;
3644 };
3645 bfd_size_type amt;
3646
3647 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3648 opd_sym_map = bfd_zalloc (abfd, amt);
3649 if (opd_sym_map == NULL)
3650 return FALSE;
3651 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3652 }
3653
3654 if (htab->sfpr == NULL
3655 && !create_linkage_sections (htab->elf.dynobj, info))
3656 return FALSE;
3657
3658 rel_end = relocs + sec->reloc_count;
3659 for (rel = relocs; rel < rel_end; rel++)
3660 {
3661 unsigned long r_symndx;
3662 struct elf_link_hash_entry *h;
3663 enum elf_ppc64_reloc_type r_type;
3664 int tls_type = 0;
3665
3666 r_symndx = ELF64_R_SYM (rel->r_info);
3667 if (r_symndx < symtab_hdr->sh_info)
3668 h = NULL;
3669 else
3670 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3671
3672 r_type = ELF64_R_TYPE (rel->r_info);
3673 switch (r_type)
3674 {
3675 case R_PPC64_GOT_TLSLD16:
3676 case R_PPC64_GOT_TLSLD16_LO:
3677 case R_PPC64_GOT_TLSLD16_HI:
3678 case R_PPC64_GOT_TLSLD16_HA:
3679 ppc64_tlsld_got (abfd)->refcount += 1;
3680 tls_type = TLS_TLS | TLS_LD;
3681 goto dogottls;
3682
3683 case R_PPC64_GOT_TLSGD16:
3684 case R_PPC64_GOT_TLSGD16_LO:
3685 case R_PPC64_GOT_TLSGD16_HI:
3686 case R_PPC64_GOT_TLSGD16_HA:
3687 tls_type = TLS_TLS | TLS_GD;
3688 goto dogottls;
3689
3690 case R_PPC64_GOT_TPREL16_DS:
3691 case R_PPC64_GOT_TPREL16_LO_DS:
3692 case R_PPC64_GOT_TPREL16_HI:
3693 case R_PPC64_GOT_TPREL16_HA:
3694 if (info->shared)
3695 info->flags |= DF_STATIC_TLS;
3696 tls_type = TLS_TLS | TLS_TPREL;
3697 goto dogottls;
3698
3699 case R_PPC64_GOT_DTPREL16_DS:
3700 case R_PPC64_GOT_DTPREL16_LO_DS:
3701 case R_PPC64_GOT_DTPREL16_HI:
3702 case R_PPC64_GOT_DTPREL16_HA:
3703 tls_type = TLS_TLS | TLS_DTPREL;
3704 dogottls:
3705 sec->has_tls_reloc = 1;
3706 /* Fall thru */
3707
3708 case R_PPC64_GOT16:
3709 case R_PPC64_GOT16_DS:
3710 case R_PPC64_GOT16_HA:
3711 case R_PPC64_GOT16_HI:
3712 case R_PPC64_GOT16_LO:
3713 case R_PPC64_GOT16_LO_DS:
3714 /* This symbol requires a global offset table entry. */
3715 sec->has_gp_reloc = 1;
3716 if (ppc64_elf_tdata (abfd)->got == NULL
3717 && !create_got_section (abfd, info))
3718 return FALSE;
3719
3720 if (h != NULL)
3721 {
3722 struct ppc_link_hash_entry *eh;
3723 struct got_entry *ent;
3724
3725 eh = (struct ppc_link_hash_entry *) h;
3726 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3727 if (ent->addend == rel->r_addend
3728 && ent->owner == abfd
3729 && ent->tls_type == tls_type)
3730 break;
3731 if (ent == NULL)
3732 {
3733 bfd_size_type amt = sizeof (*ent);
3734 ent = bfd_alloc (abfd, amt);
3735 if (ent == NULL)
3736 return FALSE;
3737 ent->next = eh->elf.got.glist;
3738 ent->addend = rel->r_addend;
3739 ent->owner = abfd;
3740 ent->tls_type = tls_type;
3741 ent->got.refcount = 0;
3742 eh->elf.got.glist = ent;
3743 }
3744 ent->got.refcount += 1;
3745 eh->tls_mask |= tls_type;
3746 }
3747 else
3748 /* This is a global offset table entry for a local symbol. */
3749 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3750 rel->r_addend, tls_type))
3751 return FALSE;
3752 break;
3753
3754 case R_PPC64_PLT16_HA:
3755 case R_PPC64_PLT16_HI:
3756 case R_PPC64_PLT16_LO:
3757 case R_PPC64_PLT32:
3758 case R_PPC64_PLT64:
3759 /* This symbol requires a procedure linkage table entry. We
3760 actually build the entry in adjust_dynamic_symbol,
3761 because this might be a case of linking PIC code without
3762 linking in any dynamic objects, in which case we don't
3763 need to generate a procedure linkage table after all. */
3764 if (h == NULL)
3765 {
3766 /* It does not make sense to have a procedure linkage
3767 table entry for a local symbol. */
3768 bfd_set_error (bfd_error_bad_value);
3769 return FALSE;
3770 }
3771 else
3772 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3773 rel->r_addend))
3774 return FALSE;
3775 break;
3776
3777 /* The following relocations don't need to propagate the
3778 relocation if linking a shared object since they are
3779 section relative. */
3780 case R_PPC64_SECTOFF:
3781 case R_PPC64_SECTOFF_LO:
3782 case R_PPC64_SECTOFF_HI:
3783 case R_PPC64_SECTOFF_HA:
3784 case R_PPC64_SECTOFF_DS:
3785 case R_PPC64_SECTOFF_LO_DS:
3786 case R_PPC64_DTPREL16:
3787 case R_PPC64_DTPREL16_LO:
3788 case R_PPC64_DTPREL16_HI:
3789 case R_PPC64_DTPREL16_HA:
3790 case R_PPC64_DTPREL16_DS:
3791 case R_PPC64_DTPREL16_LO_DS:
3792 case R_PPC64_DTPREL16_HIGHER:
3793 case R_PPC64_DTPREL16_HIGHERA:
3794 case R_PPC64_DTPREL16_HIGHEST:
3795 case R_PPC64_DTPREL16_HIGHESTA:
3796 break;
3797
3798 /* Nor do these. */
3799 case R_PPC64_TOC16:
3800 case R_PPC64_TOC16_LO:
3801 case R_PPC64_TOC16_HI:
3802 case R_PPC64_TOC16_HA:
3803 case R_PPC64_TOC16_DS:
3804 case R_PPC64_TOC16_LO_DS:
3805 sec->has_gp_reloc = 1;
3806 break;
3807
3808 /* This relocation describes the C++ object vtable hierarchy.
3809 Reconstruct it for later use during GC. */
3810 case R_PPC64_GNU_VTINHERIT:
3811 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3812 return FALSE;
3813 break;
3814
3815 /* This relocation describes which C++ vtable entries are actually
3816 used. Record for later use during GC. */
3817 case R_PPC64_GNU_VTENTRY:
3818 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3819 return FALSE;
3820 break;
3821
3822 case R_PPC64_REL14:
3823 case R_PPC64_REL14_BRTAKEN:
3824 case R_PPC64_REL14_BRNTAKEN:
3825 htab->has_14bit_branch = 1;
3826 /* Fall through. */
3827
3828 case R_PPC64_REL24:
3829 if (h != NULL
3830 && h->root.root.string[0] == '.'
3831 && h->root.root.string[1] != 0)
3832 {
3833 /* We may need a .plt entry if the function this reloc
3834 refers to is in a shared lib. */
3835 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3836 rel->r_addend))
3837 return FALSE;
3838 if (h == htab->tls_get_addr)
3839 sec->has_tls_reloc = 1;
3840 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3841 == 0)
3842 && (h->root.root.string[15] == 0
3843 || h->root.root.string[15] == '@'))
3844 {
3845 htab->tls_get_addr = h;
3846 sec->has_tls_reloc = 1;
3847 }
3848 }
3849 break;
3850
3851 case R_PPC64_TPREL64:
3852 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3853 if (info->shared)
3854 info->flags |= DF_STATIC_TLS;
3855 goto dotlstoc;
3856
3857 case R_PPC64_DTPMOD64:
3858 if (rel + 1 < rel_end
3859 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3860 && rel[1].r_offset == rel->r_offset + 8)
3861 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3862 else
3863 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3864 goto dotlstoc;
3865
3866 case R_PPC64_DTPREL64:
3867 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3868 if (rel != relocs
3869 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3870 && rel[-1].r_offset == rel->r_offset - 8)
3871 /* This is the second reloc of a dtpmod, dtprel pair.
3872 Don't mark with TLS_DTPREL. */
3873 goto dodyn;
3874
3875 dotlstoc:
3876 sec->has_tls_reloc = 1;
3877 if (h != NULL)
3878 {
3879 struct ppc_link_hash_entry *eh;
3880 eh = (struct ppc_link_hash_entry *) h;
3881 eh->tls_mask |= tls_type;
3882 }
3883 else
3884 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3885 rel->r_addend, tls_type))
3886 return FALSE;
3887
3888 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3889 {
3890 /* One extra to simplify get_tls_mask. */
3891 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3892 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3893 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3894 return FALSE;
3895 }
3896 BFD_ASSERT (rel->r_offset % 8 == 0);
3897 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3898
3899 /* Mark the second slot of a GD or LD entry.
3900 -1 to indicate GD and -2 to indicate LD. */
3901 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3902 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3903 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3904 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3905 goto dodyn;
3906
3907 case R_PPC64_TPREL16:
3908 case R_PPC64_TPREL16_LO:
3909 case R_PPC64_TPREL16_HI:
3910 case R_PPC64_TPREL16_HA:
3911 case R_PPC64_TPREL16_DS:
3912 case R_PPC64_TPREL16_LO_DS:
3913 case R_PPC64_TPREL16_HIGHER:
3914 case R_PPC64_TPREL16_HIGHERA:
3915 case R_PPC64_TPREL16_HIGHEST:
3916 case R_PPC64_TPREL16_HIGHESTA:
3917 if (info->shared)
3918 {
3919 info->flags |= DF_STATIC_TLS;
3920 goto dodyn;
3921 }
3922 break;
3923
3924 case R_PPC64_ADDR64:
3925 if (opd_sym_map != NULL
3926 && h != NULL
3927 && h->root.root.string[0] == '.'
3928 && h->root.root.string[1] != 0)
3929 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3930
3931 if (opd_sym_map != NULL
3932 && h == NULL
3933 && rel + 1 < rel_end
3934 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3935 {
3936 asection *s;
3937
3938 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3939 r_symndx);
3940 if (s == NULL)
3941 return FALSE;
3942 else if (s != sec)
3943 opd_sym_map[rel->r_offset / 24] = s;
3944 }
3945 /* Fall through. */
3946
3947 case R_PPC64_REL30:
3948 case R_PPC64_REL32:
3949 case R_PPC64_REL64:
3950 case R_PPC64_ADDR14:
3951 case R_PPC64_ADDR14_BRNTAKEN:
3952 case R_PPC64_ADDR14_BRTAKEN:
3953 case R_PPC64_ADDR16:
3954 case R_PPC64_ADDR16_DS:
3955 case R_PPC64_ADDR16_HA:
3956 case R_PPC64_ADDR16_HI:
3957 case R_PPC64_ADDR16_HIGHER:
3958 case R_PPC64_ADDR16_HIGHERA:
3959 case R_PPC64_ADDR16_HIGHEST:
3960 case R_PPC64_ADDR16_HIGHESTA:
3961 case R_PPC64_ADDR16_LO:
3962 case R_PPC64_ADDR16_LO_DS:
3963 case R_PPC64_ADDR24:
3964 case R_PPC64_ADDR32:
3965 case R_PPC64_UADDR16:
3966 case R_PPC64_UADDR32:
3967 case R_PPC64_UADDR64:
3968 case R_PPC64_TOC:
3969 if (h != NULL && !info->shared)
3970 /* We may need a copy reloc. */
3971 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3972
3973 /* Don't propagate .opd relocs. */
3974 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3975 break;
3976
3977 /* If we are creating a shared library, and this is a reloc
3978 against a global symbol, or a non PC relative reloc
3979 against a local symbol, then we need to copy the reloc
3980 into the shared library. However, if we are linking with
3981 -Bsymbolic, we do not need to copy a reloc against a
3982 global symbol which is defined in an object we are
3983 including in the link (i.e., DEF_REGULAR is set). At
3984 this point we have not seen all the input files, so it is
3985 possible that DEF_REGULAR is not set now but will be set
3986 later (it is never cleared). In case of a weak definition,
3987 DEF_REGULAR may be cleared later by a strong definition in
3988 a shared library. We account for that possibility below by
3989 storing information in the dyn_relocs field of the hash
3990 table entry. A similar situation occurs when creating
3991 shared libraries and symbol visibility changes render the
3992 symbol local.
3993
3994 If on the other hand, we are creating an executable, we
3995 may need to keep relocations for symbols satisfied by a
3996 dynamic library if we manage to avoid copy relocs for the
3997 symbol. */
3998 dodyn:
3999 if ((info->shared
4000 && (MUST_BE_DYN_RELOC (r_type)
4001 || (h != NULL
4002 && (! info->symbolic
4003 || h->root.type == bfd_link_hash_defweak
4004 || (h->elf_link_hash_flags
4005 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4006 || (ELIMINATE_COPY_RELOCS
4007 && !info->shared
4008 && h != NULL
4009 && (h->root.type == bfd_link_hash_defweak
4010 || (h->elf_link_hash_flags
4011 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
4012 {
4013 struct ppc_dyn_relocs *p;
4014 struct ppc_dyn_relocs **head;
4015
4016 /* We must copy these reloc types into the output file.
4017 Create a reloc section in dynobj and make room for
4018 this reloc. */
4019 if (sreloc == NULL)
4020 {
4021 const char *name;
4022 bfd *dynobj;
4023
4024 name = (bfd_elf_string_from_elf_section
4025 (abfd,
4026 elf_elfheader (abfd)->e_shstrndx,
4027 elf_section_data (sec)->rel_hdr.sh_name));
4028 if (name == NULL)
4029 return FALSE;
4030
4031 if (strncmp (name, ".rela", 5) != 0
4032 || strcmp (bfd_get_section_name (abfd, sec),
4033 name + 5) != 0)
4034 {
4035 (*_bfd_error_handler)
4036 (_("%s: bad relocation section name `%s\'"),
4037 bfd_archive_filename (abfd), name);
4038 bfd_set_error (bfd_error_bad_value);
4039 }
4040
4041 dynobj = htab->elf.dynobj;
4042 sreloc = bfd_get_section_by_name (dynobj, name);
4043 if (sreloc == NULL)
4044 {
4045 flagword flags;
4046
4047 sreloc = bfd_make_section (dynobj, name);
4048 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4049 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4050 if ((sec->flags & SEC_ALLOC) != 0)
4051 flags |= SEC_ALLOC | SEC_LOAD;
4052 if (sreloc == NULL
4053 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4054 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4055 return FALSE;
4056 }
4057 elf_section_data (sec)->sreloc = sreloc;
4058 }
4059
4060 /* If this is a global symbol, we count the number of
4061 relocations we need for this symbol. */
4062 if (h != NULL)
4063 {
4064 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4065 }
4066 else
4067 {
4068 /* Track dynamic relocs needed for local syms too.
4069 We really need local syms available to do this
4070 easily. Oh well. */
4071
4072 asection *s;
4073 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4074 sec, r_symndx);
4075 if (s == NULL)
4076 return FALSE;
4077
4078 head = ((struct ppc_dyn_relocs **)
4079 &elf_section_data (s)->local_dynrel);
4080 }
4081
4082 p = *head;
4083 if (p == NULL || p->sec != sec)
4084 {
4085 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4086 if (p == NULL)
4087 return FALSE;
4088 p->next = *head;
4089 *head = p;
4090 p->sec = sec;
4091 p->count = 0;
4092 p->pc_count = 0;
4093 }
4094
4095 p->count += 1;
4096 if (!MUST_BE_DYN_RELOC (r_type))
4097 p->pc_count += 1;
4098 }
4099 break;
4100
4101 default:
4102 break;
4103 }
4104 }
4105
4106 return TRUE;
4107 }
4108
4109 /* Return the section that should be marked against GC for a given
4110 relocation. */
4111
4112 static asection *
4113 ppc64_elf_gc_mark_hook (asection *sec,
4114 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4115 Elf_Internal_Rela *rel,
4116 struct elf_link_hash_entry *h,
4117 Elf_Internal_Sym *sym)
4118 {
4119 asection *rsec = NULL;
4120
4121 if (h != NULL)
4122 {
4123 enum elf_ppc64_reloc_type r_type;
4124 struct ppc_link_hash_entry *fdh;
4125
4126 r_type = ELF64_R_TYPE (rel->r_info);
4127 switch (r_type)
4128 {
4129 case R_PPC64_GNU_VTINHERIT:
4130 case R_PPC64_GNU_VTENTRY:
4131 break;
4132
4133 default:
4134 switch (h->root.type)
4135 {
4136 case bfd_link_hash_defined:
4137 case bfd_link_hash_defweak:
4138 fdh = (struct ppc_link_hash_entry *) h;
4139
4140 /* Function descriptor syms cause the associated
4141 function code sym section to be marked. */
4142 if (fdh->is_func_descriptor)
4143 rsec = fdh->oh->root.u.def.section;
4144
4145 /* Function entry syms return NULL if they are in .opd
4146 and are not ._start (or others undefined on the ld
4147 command line). Thus we avoid marking all function
4148 sections, as all functions are referenced in .opd. */
4149 else if ((fdh->oh != NULL
4150 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4151 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4152 rsec = h->root.u.def.section;
4153 break;
4154
4155 case bfd_link_hash_common:
4156 rsec = h->root.u.c.p->section;
4157 break;
4158
4159 default:
4160 break;
4161 }
4162 }
4163 }
4164 else
4165 {
4166 asection **opd_sym_section;
4167
4168 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4169 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4170 if (opd_sym_section != NULL)
4171 rsec = opd_sym_section[sym->st_value / 24];
4172 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4173 rsec = NULL;
4174 }
4175
4176 return rsec;
4177 }
4178
4179 /* Update the .got, .plt. and dynamic reloc reference counts for the
4180 section being removed. */
4181
4182 static bfd_boolean
4183 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4184 asection *sec, const Elf_Internal_Rela *relocs)
4185 {
4186 struct ppc_link_hash_table *htab;
4187 Elf_Internal_Shdr *symtab_hdr;
4188 struct elf_link_hash_entry **sym_hashes;
4189 struct got_entry **local_got_ents;
4190 const Elf_Internal_Rela *rel, *relend;
4191
4192 if ((sec->flags & SEC_ALLOC) == 0)
4193 return TRUE;
4194
4195 elf_section_data (sec)->local_dynrel = NULL;
4196
4197 htab = ppc_hash_table (info);
4198 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4199 sym_hashes = elf_sym_hashes (abfd);
4200 local_got_ents = elf_local_got_ents (abfd);
4201
4202 relend = relocs + sec->reloc_count;
4203 for (rel = relocs; rel < relend; rel++)
4204 {
4205 unsigned long r_symndx;
4206 enum elf_ppc64_reloc_type r_type;
4207 struct elf_link_hash_entry *h = NULL;
4208 char tls_type = 0;
4209
4210 r_symndx = ELF64_R_SYM (rel->r_info);
4211 r_type = ELF64_R_TYPE (rel->r_info);
4212 if (r_symndx >= symtab_hdr->sh_info)
4213 {
4214 struct ppc_link_hash_entry *eh;
4215 struct ppc_dyn_relocs **pp;
4216 struct ppc_dyn_relocs *p;
4217
4218 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4219 eh = (struct ppc_link_hash_entry *) h;
4220
4221 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4222 if (p->sec == sec)
4223 {
4224 /* Everything must go for SEC. */
4225 *pp = p->next;
4226 break;
4227 }
4228 }
4229
4230 switch (r_type)
4231 {
4232 case R_PPC64_GOT_TLSLD16:
4233 case R_PPC64_GOT_TLSLD16_LO:
4234 case R_PPC64_GOT_TLSLD16_HI:
4235 case R_PPC64_GOT_TLSLD16_HA:
4236 ppc64_tlsld_got (abfd)->refcount -= 1;
4237 tls_type = TLS_TLS | TLS_LD;
4238 goto dogot;
4239
4240 case R_PPC64_GOT_TLSGD16:
4241 case R_PPC64_GOT_TLSGD16_LO:
4242 case R_PPC64_GOT_TLSGD16_HI:
4243 case R_PPC64_GOT_TLSGD16_HA:
4244 tls_type = TLS_TLS | TLS_GD;
4245 goto dogot;
4246
4247 case R_PPC64_GOT_TPREL16_DS:
4248 case R_PPC64_GOT_TPREL16_LO_DS:
4249 case R_PPC64_GOT_TPREL16_HI:
4250 case R_PPC64_GOT_TPREL16_HA:
4251 tls_type = TLS_TLS | TLS_TPREL;
4252 goto dogot;
4253
4254 case R_PPC64_GOT_DTPREL16_DS:
4255 case R_PPC64_GOT_DTPREL16_LO_DS:
4256 case R_PPC64_GOT_DTPREL16_HI:
4257 case R_PPC64_GOT_DTPREL16_HA:
4258 tls_type = TLS_TLS | TLS_DTPREL;
4259 goto dogot;
4260
4261 case R_PPC64_GOT16:
4262 case R_PPC64_GOT16_DS:
4263 case R_PPC64_GOT16_HA:
4264 case R_PPC64_GOT16_HI:
4265 case R_PPC64_GOT16_LO:
4266 case R_PPC64_GOT16_LO_DS:
4267 dogot:
4268 {
4269 struct got_entry *ent;
4270
4271 if (h != NULL)
4272 ent = h->got.glist;
4273 else
4274 ent = local_got_ents[r_symndx];
4275
4276 for (; ent != NULL; ent = ent->next)
4277 if (ent->addend == rel->r_addend
4278 && ent->owner == abfd
4279 && ent->tls_type == tls_type)
4280 break;
4281 if (ent == NULL)
4282 abort ();
4283 if (ent->got.refcount > 0)
4284 ent->got.refcount -= 1;
4285 }
4286 break;
4287
4288 case R_PPC64_PLT16_HA:
4289 case R_PPC64_PLT16_HI:
4290 case R_PPC64_PLT16_LO:
4291 case R_PPC64_PLT32:
4292 case R_PPC64_PLT64:
4293 case R_PPC64_REL14:
4294 case R_PPC64_REL14_BRNTAKEN:
4295 case R_PPC64_REL14_BRTAKEN:
4296 case R_PPC64_REL24:
4297 if (h != NULL)
4298 {
4299 struct plt_entry *ent;
4300
4301 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4302 if (ent->addend == rel->r_addend)
4303 break;
4304 if (ent == NULL)
4305 abort ();
4306 if (ent->plt.refcount > 0)
4307 ent->plt.refcount -= 1;
4308 }
4309 break;
4310
4311 default:
4312 break;
4313 }
4314 }
4315 return TRUE;
4316 }
4317
4318 /* Called via elf_link_hash_traverse to transfer dynamic linking
4319 information on function code symbol entries to their corresponding
4320 function descriptor symbol entries. */
4321 static bfd_boolean
4322 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4323 {
4324 struct bfd_link_info *info;
4325 struct ppc_link_hash_table *htab;
4326 struct plt_entry *ent;
4327 struct ppc_link_hash_entry *fh;
4328 struct ppc_link_hash_entry *fdh;
4329 bfd_boolean force_local;
4330
4331 fh = (struct ppc_link_hash_entry *) h;
4332 if (fh->elf.root.type == bfd_link_hash_indirect)
4333 return TRUE;
4334
4335 if (fh->elf.root.type == bfd_link_hash_warning)
4336 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4337
4338 info = inf;
4339 htab = ppc_hash_table (info);
4340
4341 /* If this is a function code symbol, transfer dynamic linking
4342 information to the function descriptor symbol. */
4343 if (!fh->is_func)
4344 return TRUE;
4345
4346 if (fh->elf.root.type == bfd_link_hash_undefweak
4347 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4348 htab->have_undefweak = TRUE;
4349
4350 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4351 if (ent->plt.refcount > 0)
4352 break;
4353 if (ent == NULL
4354 || fh->elf.root.root.string[0] != '.'
4355 || fh->elf.root.root.string[1] == '\0')
4356 return TRUE;
4357
4358 /* Find the corresponding function descriptor symbol. Create it
4359 as undefined if necessary. */
4360
4361 fdh = get_fdh (fh, htab);
4362 if (fdh != NULL)
4363 while (fdh->elf.root.type == bfd_link_hash_indirect
4364 || fdh->elf.root.type == bfd_link_hash_warning)
4365 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4366
4367 if (fdh == NULL
4368 && info->shared
4369 && (fh->elf.root.type == bfd_link_hash_undefined
4370 || fh->elf.root.type == bfd_link_hash_undefweak))
4371 {
4372 bfd *abfd;
4373 asymbol *newsym;
4374 struct bfd_link_hash_entry *bh;
4375
4376 abfd = fh->elf.root.u.undef.abfd;
4377 newsym = bfd_make_empty_symbol (abfd);
4378 newsym->name = fh->elf.root.root.string + 1;
4379 newsym->section = bfd_und_section_ptr;
4380 newsym->value = 0;
4381 newsym->flags = BSF_OBJECT;
4382 if (fh->elf.root.type == bfd_link_hash_undefweak)
4383 newsym->flags |= BSF_WEAK;
4384
4385 bh = &fdh->elf.root;
4386 if ( !(_bfd_generic_link_add_one_symbol
4387 (info, abfd, newsym->name, newsym->flags,
4388 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4389 {
4390 return FALSE;
4391 }
4392 fdh = (struct ppc_link_hash_entry *) bh;
4393 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4394 fdh->elf.size = 24;
4395 fdh->elf.type = STT_OBJECT;
4396 }
4397
4398 if (fdh != NULL
4399 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4400 && (info->shared
4401 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4402 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4403 || (fdh->elf.root.type == bfd_link_hash_undefweak
4404 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4405 {
4406 if (fdh->elf.dynindx == -1)
4407 if (! bfd_elf64_link_record_dynamic_symbol (info, &fdh->elf))
4408 return FALSE;
4409 fdh->elf.elf_link_hash_flags
4410 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4411 | ELF_LINK_HASH_REF_DYNAMIC
4412 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4413 | ELF_LINK_NON_GOT_REF));
4414 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4415 {
4416 fdh->elf.plt.plist = fh->elf.plt.plist;
4417 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4418 }
4419 fdh->is_func_descriptor = 1;
4420 fdh->oh = &fh->elf;
4421 fh->oh = &fdh->elf;
4422 }
4423
4424 /* Now that the info is on the function descriptor, clear the
4425 function code sym info. Any function code syms for which we
4426 don't have a definition in a regular file, we force local.
4427 This prevents a shared library from exporting syms that have
4428 been imported from another library. Function code syms that
4429 are really in the library we must leave global to prevent the
4430 linker dragging in a definition from a static library. */
4431 force_local
4432 = (info->shared
4433 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4434 || fdh == NULL
4435 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4436 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4437 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4438
4439 return TRUE;
4440 }
4441
4442 #define MIN_SAVE_FPR 14
4443 #define MAX_SAVE_FPR 31
4444
4445 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4446 this hook to a) provide some gcc support functions, and b) transfer
4447 dynamic linking information gathered so far on function code symbol
4448 entries, to their corresponding function descriptor symbol entries. */
4449 static bfd_boolean
4450 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4451 struct bfd_link_info *info)
4452 {
4453 struct ppc_link_hash_table *htab;
4454 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4455 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4456 unsigned int i;
4457 struct elf_link_hash_entry *h;
4458 bfd_byte *p;
4459 char sym[10];
4460
4461 htab = ppc_hash_table (info);
4462
4463 if (htab->sfpr == NULL)
4464 /* We don't have any relocs. */
4465 return TRUE;
4466
4467 /* First provide any missing ._savef* and ._restf* functions. */
4468 memcpy (sym, "._savef14", 10);
4469 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4470 {
4471 sym[7] = i / 10 + '0';
4472 sym[8] = i % 10 + '0';
4473 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4474 if (h != NULL
4475 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4476 {
4477 if (lowest_savef > i)
4478 lowest_savef = i;
4479 h->root.type = bfd_link_hash_defined;
4480 h->root.u.def.section = htab->sfpr;
4481 h->root.u.def.value = (i - lowest_savef) * 4;
4482 h->type = STT_FUNC;
4483 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4484 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4485 }
4486 }
4487
4488 memcpy (sym, "._restf14", 10);
4489 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4490 {
4491 sym[7] = i / 10 + '0';
4492 sym[8] = i % 10 + '0';
4493 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4494 if (h != NULL
4495 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4496 {
4497 if (lowest_restf > i)
4498 lowest_restf = i;
4499 h->root.type = bfd_link_hash_defined;
4500 h->root.u.def.section = htab->sfpr;
4501 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4502 + (i - lowest_restf) * 4);
4503 h->type = STT_FUNC;
4504 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4505 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4506 }
4507 }
4508
4509 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4510
4511 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4512 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4513
4514 if (htab->sfpr->_raw_size == 0)
4515 {
4516 if (!htab->have_undefweak)
4517 {
4518 _bfd_strip_section_from_output (info, htab->sfpr);
4519 return TRUE;
4520 }
4521
4522 htab->sfpr->_raw_size = 4;
4523 }
4524
4525 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_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 || htab->sfpr->_raw_size == 4)
4552 {
4553 bfd_put_32 (htab->elf.dynobj, BLR, p);
4554 }
4555
4556 return TRUE;
4557 }
4558
4559 /* Adjust a symbol defined by a dynamic object and referenced by a
4560 regular object. The current definition is in some section of the
4561 dynamic object, but we're not including those sections. We have to
4562 change the definition to something the rest of the link can
4563 understand. */
4564
4565 static bfd_boolean
4566 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4567 struct elf_link_hash_entry *h)
4568 {
4569 struct ppc_link_hash_table *htab;
4570 asection *s;
4571 unsigned int power_of_two;
4572
4573 htab = ppc_hash_table (info);
4574
4575 /* Deal with function syms. */
4576 if (h->type == STT_FUNC
4577 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4578 {
4579 /* Clear procedure linkage table information for any symbol that
4580 won't need a .plt entry. */
4581 struct plt_entry *ent;
4582 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4583 if (ent->plt.refcount > 0)
4584 break;
4585 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4586 || ent == NULL
4587 || SYMBOL_CALLS_LOCAL (info, h)
4588 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4589 && h->root.type == bfd_link_hash_undefweak))
4590 {
4591 h->plt.plist = NULL;
4592 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4593 }
4594 }
4595 else
4596 h->plt.plist = NULL;
4597
4598 /* If this is a weak symbol, and there is a real definition, the
4599 processor independent code will have arranged for us to see the
4600 real definition first, and we can just use the same value. */
4601 if (h->weakdef != NULL)
4602 {
4603 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4604 || h->weakdef->root.type == bfd_link_hash_defweak);
4605 h->root.u.def.section = h->weakdef->root.u.def.section;
4606 h->root.u.def.value = h->weakdef->root.u.def.value;
4607 if (ELIMINATE_COPY_RELOCS)
4608 h->elf_link_hash_flags
4609 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4610 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4611 return TRUE;
4612 }
4613
4614 /* If we are creating a shared library, we must presume that the
4615 only references to the symbol are via the global offset table.
4616 For such cases we need not do anything here; the relocations will
4617 be handled correctly by relocate_section. */
4618 if (info->shared)
4619 return TRUE;
4620
4621 /* If there are no references to this symbol that do not use the
4622 GOT, we don't need to generate a copy reloc. */
4623 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4624 return TRUE;
4625
4626 if (ELIMINATE_COPY_RELOCS)
4627 {
4628 struct ppc_link_hash_entry * eh;
4629 struct ppc_dyn_relocs *p;
4630
4631 eh = (struct ppc_link_hash_entry *) h;
4632 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4633 {
4634 s = p->sec->output_section;
4635 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4636 break;
4637 }
4638
4639 /* If we didn't find any dynamic relocs in read-only sections, then
4640 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4641 if (p == NULL)
4642 {
4643 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4644 return TRUE;
4645 }
4646 }
4647
4648 if (h->plt.plist != NULL)
4649 {
4650 /* We should never get here, but unfortunately there are versions
4651 of gcc out there that improperly (for this ABI) put initialized
4652 function pointers, vtable refs and suchlike in read-only
4653 sections. Allow them to proceed, but warn that this might
4654 break at runtime. */
4655 (*_bfd_error_handler)
4656 (_("copy reloc against `%s' requires lazy plt linking; "
4657 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4658 h->root.root.string);
4659 }
4660
4661 /* This is a reference to a symbol defined by a dynamic object which
4662 is not a function. */
4663
4664 /* We must allocate the symbol in our .dynbss section, which will
4665 become part of the .bss section of the executable. There will be
4666 an entry for this symbol in the .dynsym section. The dynamic
4667 object will contain position independent code, so all references
4668 from the dynamic object to this symbol will go through the global
4669 offset table. The dynamic linker will use the .dynsym entry to
4670 determine the address it must put in the global offset table, so
4671 both the dynamic object and the regular object will refer to the
4672 same memory location for the variable. */
4673
4674 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4675 to copy the initial value out of the dynamic object and into the
4676 runtime process image. We need to remember the offset into the
4677 .rela.bss section we are going to use. */
4678 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4679 {
4680 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4681 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4682 }
4683
4684 /* We need to figure out the alignment required for this symbol. I
4685 have no idea how ELF linkers handle this. */
4686 power_of_two = bfd_log2 (h->size);
4687 if (power_of_two > 4)
4688 power_of_two = 4;
4689
4690 /* Apply the required alignment. */
4691 s = htab->dynbss;
4692 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4693 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4694 {
4695 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4696 return FALSE;
4697 }
4698
4699 /* Define the symbol as being at this point in the section. */
4700 h->root.u.def.section = s;
4701 h->root.u.def.value = s->_raw_size;
4702
4703 /* Increment the section size to make room for the symbol. */
4704 s->_raw_size += h->size;
4705
4706 return TRUE;
4707 }
4708
4709 /* If given a function descriptor symbol, hide both the function code
4710 sym and the descriptor. */
4711 static void
4712 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4713 struct elf_link_hash_entry *h,
4714 bfd_boolean force_local)
4715 {
4716 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4717
4718 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4719 {
4720 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4721
4722 if (fh == NULL)
4723 {
4724 const char *p, *q;
4725 struct ppc_link_hash_table *htab;
4726 char save;
4727
4728 /* We aren't supposed to use alloca in BFD because on
4729 systems which do not have alloca the version in libiberty
4730 calls xmalloc, which might cause the program to crash
4731 when it runs out of memory. This function doesn't have a
4732 return status, so there's no way to gracefully return an
4733 error. So cheat. We know that string[-1] can be safely
4734 dereferenced; It's either a string in an ELF string
4735 table, or allocated in an objalloc structure. */
4736
4737 p = h->root.root.string - 1;
4738 save = *p;
4739 *(char *) p = '.';
4740 htab = ppc_hash_table (info);
4741 fh = 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 = h->root.root.string + strlen (h->root.root.string);
4751 while (q >= h->root.root.string && *q == *p)
4752 --q, --p;
4753 if (q < h->root.root.string && *p == '.')
4754 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4755 }
4756 if (fh != NULL)
4757 {
4758 ((struct ppc_link_hash_entry *) h)->oh = fh;
4759 ((struct ppc_link_hash_entry *) fh)->oh = h;
4760 }
4761 }
4762 if (fh != NULL)
4763 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4764 }
4765 }
4766
4767 static bfd_boolean
4768 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4769 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4770 unsigned long r_symndx, bfd *ibfd)
4771 {
4772 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4773
4774 if (r_symndx >= symtab_hdr->sh_info)
4775 {
4776 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4777 struct elf_link_hash_entry *h;
4778
4779 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4780 while (h->root.type == bfd_link_hash_indirect
4781 || h->root.type == bfd_link_hash_warning)
4782 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4783
4784 if (hp != NULL)
4785 *hp = h;
4786
4787 if (symp != NULL)
4788 *symp = NULL;
4789
4790 if (symsecp != NULL)
4791 {
4792 asection *symsec = NULL;
4793 if (h->root.type == bfd_link_hash_defined
4794 || h->root.type == bfd_link_hash_defweak)
4795 symsec = h->root.u.def.section;
4796 *symsecp = symsec;
4797 }
4798
4799 if (tls_maskp != NULL)
4800 {
4801 struct ppc_link_hash_entry *eh;
4802
4803 eh = (struct ppc_link_hash_entry *) h;
4804 *tls_maskp = &eh->tls_mask;
4805 }
4806 }
4807 else
4808 {
4809 Elf_Internal_Sym *sym;
4810 Elf_Internal_Sym *locsyms = *locsymsp;
4811
4812 if (locsyms == NULL)
4813 {
4814 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4815 if (locsyms == NULL)
4816 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4817 symtab_hdr->sh_info,
4818 0, NULL, NULL, NULL);
4819 if (locsyms == NULL)
4820 return FALSE;
4821 *locsymsp = locsyms;
4822 }
4823 sym = locsyms + r_symndx;
4824
4825 if (hp != NULL)
4826 *hp = NULL;
4827
4828 if (symp != NULL)
4829 *symp = sym;
4830
4831 if (symsecp != NULL)
4832 {
4833 asection *symsec = NULL;
4834 if ((sym->st_shndx != SHN_UNDEF
4835 && sym->st_shndx < SHN_LORESERVE)
4836 || sym->st_shndx > SHN_HIRESERVE)
4837 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4838 *symsecp = symsec;
4839 }
4840
4841 if (tls_maskp != NULL)
4842 {
4843 struct got_entry **lgot_ents;
4844 char *tls_mask;
4845
4846 tls_mask = NULL;
4847 lgot_ents = elf_local_got_ents (ibfd);
4848 if (lgot_ents != NULL)
4849 {
4850 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4851 tls_mask = &lgot_masks[r_symndx];
4852 }
4853 *tls_maskp = tls_mask;
4854 }
4855 }
4856 return TRUE;
4857 }
4858
4859 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4860 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4861 type suitable for optimization, and 1 otherwise. */
4862
4863 static int
4864 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
4865 Elf_Internal_Sym **locsymsp,
4866 const Elf_Internal_Rela *rel, bfd *ibfd)
4867 {
4868 unsigned long r_symndx;
4869 int next_r;
4870 struct elf_link_hash_entry *h;
4871 Elf_Internal_Sym *sym;
4872 asection *sec;
4873 bfd_vma off;
4874
4875 r_symndx = ELF64_R_SYM (rel->r_info);
4876 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4877 return 0;
4878
4879 if ((*tls_maskp != NULL && **tls_maskp != 0)
4880 || sec == NULL
4881 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4882 return 1;
4883
4884 /* Look inside a TOC section too. */
4885 if (h != NULL)
4886 {
4887 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4888 off = h->root.u.def.value;
4889 }
4890 else
4891 off = sym->st_value;
4892 off += rel->r_addend;
4893 BFD_ASSERT (off % 8 == 0);
4894 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4895 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4896 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4897 return 0;
4898 if (toc_symndx != NULL)
4899 *toc_symndx = r_symndx;
4900 if ((h == NULL
4901 || ((h->root.type == bfd_link_hash_defined
4902 || h->root.type == bfd_link_hash_defweak)
4903 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4904 && (next_r == -1 || next_r == -2))
4905 return 1 - next_r;
4906 return 1;
4907 }
4908
4909 /* Adjust all global syms defined in opd sections. In gcc generated
4910 code these will already have been done, but I suppose we have to
4911 cater for all sorts of hand written assembly. */
4912
4913 static bfd_boolean
4914 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
4915 {
4916 struct ppc_link_hash_entry *eh;
4917 asection *sym_sec;
4918 long *opd_adjust;
4919
4920 if (h->root.type == bfd_link_hash_indirect)
4921 return TRUE;
4922
4923 if (h->root.type == bfd_link_hash_warning)
4924 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4925
4926 if (h->root.type != bfd_link_hash_defined
4927 && h->root.type != bfd_link_hash_defweak)
4928 return TRUE;
4929
4930 eh = (struct ppc_link_hash_entry *) h;
4931 if (eh->adjust_done)
4932 return TRUE;
4933
4934 sym_sec = eh->elf.root.u.def.section;
4935 if (sym_sec != NULL
4936 && elf_section_data (sym_sec) != NULL
4937 && (opd_adjust = ppc64_elf_section_data (sym_sec)->opd.adjust) != NULL)
4938 {
4939 eh->elf.root.u.def.value += opd_adjust[eh->elf.root.u.def.value / 24];
4940 eh->adjust_done = 1;
4941 }
4942 return TRUE;
4943 }
4944
4945 /* Remove unused Official Procedure Descriptor entries. Currently we
4946 only remove those associated with functions in discarded link-once
4947 sections, or weakly defined functions that have been overridden. It
4948 would be possible to remove many more entries for statically linked
4949 applications. */
4950
4951 bfd_boolean
4952 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4953 {
4954 bfd *ibfd;
4955 bfd_boolean some_edited = FALSE;
4956
4957 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4958 {
4959 asection *sec;
4960 Elf_Internal_Rela *relstart, *rel, *relend;
4961 Elf_Internal_Shdr *symtab_hdr;
4962 Elf_Internal_Sym *local_syms;
4963 struct elf_link_hash_entry **sym_hashes;
4964 bfd_vma offset;
4965 bfd_size_type amt;
4966 long *adjust;
4967 bfd_boolean need_edit;
4968
4969 sec = bfd_get_section_by_name (ibfd, ".opd");
4970 if (sec == NULL)
4971 continue;
4972
4973 amt = sec->_raw_size * sizeof (long) / 24;
4974 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4975 if (adjust == NULL)
4976 {
4977 /* Must be a ld -r link. ie. check_relocs hasn't been
4978 called. */
4979 adjust = bfd_zalloc (obfd, amt);
4980 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4981 }
4982 memset (adjust, 0, amt);
4983
4984 if (sec->output_section == bfd_abs_section_ptr)
4985 continue;
4986
4987 /* Look through the section relocs. */
4988 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4989 continue;
4990
4991 local_syms = NULL;
4992 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4993 sym_hashes = elf_sym_hashes (ibfd);
4994
4995 /* Read the relocations. */
4996 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4997 info->keep_memory);
4998 if (relstart == NULL)
4999 return FALSE;
5000
5001 /* First run through the relocs to check they are sane, and to
5002 determine whether we need to edit this opd section. */
5003 need_edit = FALSE;
5004 offset = 0;
5005 relend = relstart + sec->reloc_count;
5006 for (rel = relstart; rel < relend; )
5007 {
5008 enum elf_ppc64_reloc_type r_type;
5009 unsigned long r_symndx;
5010 asection *sym_sec;
5011 struct elf_link_hash_entry *h;
5012 Elf_Internal_Sym *sym;
5013
5014 /* .opd contains a regular array of 24 byte entries. We're
5015 only interested in the reloc pointing to a function entry
5016 point. */
5017 if (rel->r_offset != offset
5018 || rel + 1 >= relend
5019 || (rel + 1)->r_offset != offset + 8)
5020 {
5021 /* If someone messes with .opd alignment then after a
5022 "ld -r" we might have padding in the middle of .opd.
5023 Also, there's nothing to prevent someone putting
5024 something silly in .opd with the assembler. No .opd
5025 optimization for them! */
5026 (*_bfd_error_handler)
5027 (_("%s: .opd is not a regular array of opd entries"),
5028 bfd_archive_filename (ibfd));
5029 need_edit = FALSE;
5030 break;
5031 }
5032
5033 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
5034 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
5035 {
5036 (*_bfd_error_handler)
5037 (_("%s: unexpected reloc type %u in .opd section"),
5038 bfd_archive_filename (ibfd), r_type);
5039 need_edit = FALSE;
5040 break;
5041 }
5042
5043 r_symndx = ELF64_R_SYM (rel->r_info);
5044 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5045 r_symndx, ibfd))
5046 goto error_ret;
5047
5048 if (sym_sec == NULL || sym_sec->owner == NULL)
5049 {
5050 const char *sym_name;
5051 if (h != NULL)
5052 sym_name = h->root.root.string;
5053 else
5054 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5055
5056 (*_bfd_error_handler)
5057 (_("%s: undefined sym `%s' in .opd section"),
5058 bfd_archive_filename (ibfd),
5059 sym_name);
5060 need_edit = FALSE;
5061 break;
5062 }
5063
5064 /* opd entries are always for functions defined in the
5065 current input bfd. If the symbol isn't defined in the
5066 input bfd, then we won't be using the function in this
5067 bfd; It must be defined in a linkonce section in another
5068 bfd, or is weak. It's also possible that we are
5069 discarding the function due to a linker script /DISCARD/,
5070 which we test for via the output_section. */
5071 if (sym_sec->owner != ibfd
5072 || sym_sec->output_section == bfd_abs_section_ptr)
5073 need_edit = TRUE;
5074
5075 offset += 24;
5076 rel += 2;
5077 /* Allow for the possibility of a reloc on the third word. */
5078 if (rel < relend
5079 && rel->r_offset == offset - 8)
5080 rel += 1;
5081 }
5082
5083 if (need_edit)
5084 {
5085 Elf_Internal_Rela *write_rel;
5086 bfd_byte *rptr, *wptr;
5087 bfd_boolean skip;
5088
5089 /* This seems a waste of time as input .opd sections are all
5090 zeros as generated by gcc, but I suppose there's no reason
5091 this will always be so. We might start putting something in
5092 the third word of .opd entries. */
5093 if ((sec->flags & SEC_IN_MEMORY) == 0)
5094 {
5095 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
5096 if (loc == NULL
5097 || !bfd_get_section_contents (ibfd, sec, loc, 0,
5098 sec->_raw_size))
5099 {
5100 error_ret:
5101 if (local_syms != NULL
5102 && symtab_hdr->contents != (unsigned char *) local_syms)
5103 free (local_syms);
5104 if (elf_section_data (sec)->relocs != relstart)
5105 free (relstart);
5106 return FALSE;
5107 }
5108 sec->contents = loc;
5109 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5110 }
5111
5112 elf_section_data (sec)->relocs = relstart;
5113
5114 wptr = sec->contents;
5115 rptr = sec->contents;
5116 write_rel = relstart;
5117 skip = FALSE;
5118 offset = 0;
5119 for (rel = relstart; rel < relend; rel++)
5120 {
5121 unsigned long r_symndx;
5122 asection *sym_sec;
5123 struct elf_link_hash_entry *h;
5124 Elf_Internal_Sym *sym;
5125
5126 r_symndx = ELF64_R_SYM (rel->r_info);
5127 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5128 r_symndx, ibfd))
5129 goto error_ret;
5130
5131 if (rel->r_offset == offset)
5132 {
5133 struct ppc_link_hash_entry *fdh = NULL;
5134 if (h != NULL)
5135 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5136 ppc_hash_table (info));
5137
5138 skip = (sym_sec->owner != ibfd
5139 || sym_sec->output_section == bfd_abs_section_ptr);
5140 if (skip)
5141 {
5142 if (h != NULL && sym_sec->owner == ibfd)
5143 {
5144 /* Arrange for the function descriptor sym
5145 to be dropped. */
5146 fdh->elf.root.u.def.value = 0;
5147 fdh->elf.root.u.def.section = sym_sec;
5148 }
5149 }
5150 else
5151 {
5152 /* We'll be keeping this opd entry. */
5153
5154 if (h != NULL)
5155 {
5156 /* Redefine the function descriptor symbol to
5157 this location in the opd section. It is
5158 necessary to update the value here rather
5159 than using an array of adjustments as we do
5160 for local symbols, because various places
5161 in the generic ELF code use the value
5162 stored in u.def.value. */
5163 fdh->elf.root.u.def.value = wptr - sec->contents;
5164 fdh->adjust_done = 1;
5165 }
5166
5167 /* Local syms are a bit tricky. We could
5168 tweak them as they can be cached, but
5169 we'd need to look through the local syms
5170 for the function descriptor sym which we
5171 don't have at the moment. So keep an
5172 array of adjustments. */
5173 adjust[rel->r_offset / 24] = wptr - rptr;
5174
5175 if (wptr != rptr)
5176 memcpy (wptr, rptr, 24);
5177 wptr += 24;
5178 }
5179 rptr += 24;
5180 offset += 24;
5181 }
5182
5183 if (skip)
5184 {
5185 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5186 if (info->shared)
5187 {
5188 /* We won't be needing dynamic relocs here. */
5189 struct ppc_dyn_relocs **pp;
5190 struct ppc_dyn_relocs *p;
5191
5192 if (h != NULL)
5193 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5194 else if (sym_sec != NULL)
5195 pp = ((struct ppc_dyn_relocs **)
5196 &elf_section_data (sym_sec)->local_dynrel);
5197 else
5198 pp = ((struct ppc_dyn_relocs **)
5199 &elf_section_data (sec)->local_dynrel);
5200 while ((p = *pp) != NULL)
5201 {
5202 if (p->sec == sec)
5203 {
5204 p->count -= 1;
5205 if (p->count == 0)
5206 *pp = p->next;
5207 break;
5208 }
5209 pp = &p->next;
5210 }
5211 }
5212 }
5213 else
5214 {
5215 /* We need to adjust any reloc offsets to point to the
5216 new opd entries. While we're at it, we may as well
5217 remove redundant relocs. */
5218 rel->r_offset += wptr - rptr;
5219 if (write_rel != rel)
5220 memcpy (write_rel, rel, sizeof (*rel));
5221 ++write_rel;
5222 }
5223 }
5224
5225 sec->_cooked_size = wptr - sec->contents;
5226 sec->reloc_count = write_rel - relstart;
5227 /* Fudge the size too, as this is used later in
5228 elf_bfd_final_link if we are emitting relocs. */
5229 elf_section_data (sec)->rel_hdr.sh_size
5230 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5231 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5232 some_edited = TRUE;
5233 }
5234 else if (elf_section_data (sec)->relocs != relstart)
5235 free (relstart);
5236
5237 if (local_syms != NULL
5238 && symtab_hdr->contents != (unsigned char *) local_syms)
5239 {
5240 if (!info->keep_memory)
5241 free (local_syms);
5242 else
5243 symtab_hdr->contents = (unsigned char *) local_syms;
5244 }
5245 }
5246
5247 if (some_edited)
5248 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
5249
5250 return TRUE;
5251 }
5252
5253 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
5254
5255 asection *
5256 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5257 {
5258 struct ppc_link_hash_table *htab;
5259
5260 htab = ppc_hash_table (info);
5261 if (htab->tls_get_addr != NULL)
5262 {
5263 struct elf_link_hash_entry *h = htab->tls_get_addr;
5264
5265 while (h->root.type == bfd_link_hash_indirect
5266 || h->root.type == bfd_link_hash_warning)
5267 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5268
5269 htab->tls_get_addr = h;
5270 }
5271
5272 return _bfd_elf_tls_setup (obfd, info);
5273 }
5274
5275 /* Run through all the TLS relocs looking for optimization
5276 opportunities. The linker has been hacked (see ppc64elf.em) to do
5277 a preliminary section layout so that we know the TLS segment
5278 offsets. We can't optimize earlier because some optimizations need
5279 to know the tp offset, and we need to optimize before allocating
5280 dynamic relocations. */
5281
5282 bfd_boolean
5283 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5284 {
5285 bfd *ibfd;
5286 asection *sec;
5287 struct ppc_link_hash_table *htab;
5288
5289 if (info->relocatable || info->shared)
5290 return TRUE;
5291
5292 htab = ppc_hash_table (info);
5293 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5294 {
5295 Elf_Internal_Sym *locsyms = NULL;
5296
5297 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5298 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5299 {
5300 Elf_Internal_Rela *relstart, *rel, *relend;
5301 int expecting_tls_get_addr;
5302
5303 /* Read the relocations. */
5304 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5305 info->keep_memory);
5306 if (relstart == NULL)
5307 return FALSE;
5308
5309 expecting_tls_get_addr = 0;
5310 relend = relstart + sec->reloc_count;
5311 for (rel = relstart; rel < relend; rel++)
5312 {
5313 enum elf_ppc64_reloc_type r_type;
5314 unsigned long r_symndx;
5315 struct elf_link_hash_entry *h;
5316 Elf_Internal_Sym *sym;
5317 asection *sym_sec;
5318 char *tls_mask;
5319 char tls_set, tls_clear, tls_type = 0;
5320 bfd_vma value;
5321 bfd_boolean ok_tprel, is_local;
5322
5323 r_symndx = ELF64_R_SYM (rel->r_info);
5324 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5325 r_symndx, ibfd))
5326 {
5327 err_free_rel:
5328 if (elf_section_data (sec)->relocs != relstart)
5329 free (relstart);
5330 if (locsyms != NULL
5331 && (elf_tdata (ibfd)->symtab_hdr.contents
5332 != (unsigned char *) locsyms))
5333 free (locsyms);
5334 return FALSE;
5335 }
5336
5337 if (h != NULL)
5338 {
5339 if (h->root.type != bfd_link_hash_defined
5340 && h->root.type != bfd_link_hash_defweak)
5341 continue;
5342 value = h->root.u.def.value;
5343 }
5344 else
5345 {
5346 value = sym->st_value;
5347
5348 if (elf_section_data (sym_sec) != NULL)
5349 {
5350 long *adjust;
5351 adjust = ppc64_elf_section_data (sym_sec)->opd.adjust;
5352 if (adjust != NULL)
5353 value += adjust[value / 24];
5354 }
5355 }
5356
5357 ok_tprel = FALSE;
5358 is_local = FALSE;
5359 if (h == NULL
5360 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5361 {
5362 is_local = TRUE;
5363 value += sym_sec->output_offset;
5364 value += sym_sec->output_section->vma;
5365 value -= htab->elf.tls_sec->vma;
5366 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5367 < (bfd_vma) 1 << 32);
5368 }
5369
5370 r_type = ELF64_R_TYPE (rel->r_info);
5371 switch (r_type)
5372 {
5373 case R_PPC64_GOT_TLSLD16:
5374 case R_PPC64_GOT_TLSLD16_LO:
5375 case R_PPC64_GOT_TLSLD16_HI:
5376 case R_PPC64_GOT_TLSLD16_HA:
5377 /* These relocs should never be against a symbol
5378 defined in a shared lib. Leave them alone if
5379 that turns out to be the case. */
5380 ppc64_tlsld_got (ibfd)->refcount -= 1;
5381 if (!is_local)
5382 continue;
5383
5384 /* LD -> LE */
5385 tls_set = 0;
5386 tls_clear = TLS_LD;
5387 tls_type = TLS_TLS | TLS_LD;
5388 expecting_tls_get_addr = 1;
5389 break;
5390
5391 case R_PPC64_GOT_TLSGD16:
5392 case R_PPC64_GOT_TLSGD16_LO:
5393 case R_PPC64_GOT_TLSGD16_HI:
5394 case R_PPC64_GOT_TLSGD16_HA:
5395 if (ok_tprel)
5396 /* GD -> LE */
5397 tls_set = 0;
5398 else
5399 /* GD -> IE */
5400 tls_set = TLS_TLS | TLS_TPRELGD;
5401 tls_clear = TLS_GD;
5402 tls_type = TLS_TLS | TLS_GD;
5403 expecting_tls_get_addr = 1;
5404 break;
5405
5406 case R_PPC64_GOT_TPREL16_DS:
5407 case R_PPC64_GOT_TPREL16_LO_DS:
5408 case R_PPC64_GOT_TPREL16_HI:
5409 case R_PPC64_GOT_TPREL16_HA:
5410 expecting_tls_get_addr = 0;
5411 if (ok_tprel)
5412 {
5413 /* IE -> LE */
5414 tls_set = 0;
5415 tls_clear = TLS_TPREL;
5416 tls_type = TLS_TLS | TLS_TPREL;
5417 break;
5418 }
5419 else
5420 continue;
5421
5422 case R_PPC64_REL14:
5423 case R_PPC64_REL14_BRTAKEN:
5424 case R_PPC64_REL14_BRNTAKEN:
5425 case R_PPC64_REL24:
5426 if (h != NULL
5427 && h == htab->tls_get_addr)
5428 {
5429 if (!expecting_tls_get_addr
5430 && rel != relstart
5431 && ((ELF64_R_TYPE (rel[-1].r_info)
5432 == R_PPC64_TOC16)
5433 || (ELF64_R_TYPE (rel[-1].r_info)
5434 == R_PPC64_TOC16_LO)))
5435 {
5436 /* Check for toc tls entries. */
5437 char *toc_tls;
5438 int retval;
5439
5440 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
5441 rel - 1, ibfd);
5442 if (retval == 0)
5443 goto err_free_rel;
5444 if (toc_tls != NULL)
5445 expecting_tls_get_addr = retval > 1;
5446 }
5447
5448 if (expecting_tls_get_addr)
5449 {
5450 struct plt_entry *ent;
5451 for (ent = h->plt.plist; ent; ent = ent->next)
5452 if (ent->addend == 0)
5453 {
5454 if (ent->plt.refcount > 0)
5455 ent->plt.refcount -= 1;
5456 break;
5457 }
5458 }
5459 }
5460 expecting_tls_get_addr = 0;
5461 continue;
5462
5463 case R_PPC64_TPREL64:
5464 expecting_tls_get_addr = 0;
5465 if (ok_tprel)
5466 {
5467 /* IE -> LE */
5468 tls_set = TLS_EXPLICIT;
5469 tls_clear = TLS_TPREL;
5470 break;
5471 }
5472 else
5473 continue;
5474
5475 case R_PPC64_DTPMOD64:
5476 expecting_tls_get_addr = 0;
5477 if (rel + 1 < relend
5478 && (rel[1].r_info
5479 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5480 && rel[1].r_offset == rel->r_offset + 8)
5481 {
5482 if (ok_tprel)
5483 /* GD -> LE */
5484 tls_set = TLS_EXPLICIT | TLS_GD;
5485 else
5486 /* GD -> IE */
5487 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5488 tls_clear = TLS_GD;
5489 }
5490 else
5491 {
5492 if (!is_local)
5493 continue;
5494
5495 /* LD -> LE */
5496 tls_set = TLS_EXPLICIT;
5497 tls_clear = TLS_LD;
5498 }
5499 break;
5500
5501 default:
5502 expecting_tls_get_addr = 0;
5503 continue;
5504 }
5505
5506 if ((tls_set & TLS_EXPLICIT) == 0)
5507 {
5508 struct got_entry *ent;
5509
5510 /* Adjust got entry for this reloc. */
5511 if (h != NULL)
5512 ent = h->got.glist;
5513 else
5514 ent = elf_local_got_ents (ibfd)[r_symndx];
5515
5516 for (; ent != NULL; ent = ent->next)
5517 if (ent->addend == rel->r_addend
5518 && ent->owner == ibfd
5519 && ent->tls_type == tls_type)
5520 break;
5521 if (ent == NULL)
5522 abort ();
5523
5524 if (tls_set == 0)
5525 {
5526 /* We managed to get rid of a got entry. */
5527 if (ent->got.refcount > 0)
5528 ent->got.refcount -= 1;
5529 }
5530 }
5531 else if (h != NULL)
5532 {
5533 struct ppc_link_hash_entry * eh;
5534 struct ppc_dyn_relocs **pp;
5535 struct ppc_dyn_relocs *p;
5536
5537 /* Adjust dynamic relocs. */
5538 eh = (struct ppc_link_hash_entry *) h;
5539 for (pp = &eh->dyn_relocs;
5540 (p = *pp) != NULL;
5541 pp = &p->next)
5542 if (p->sec == sec)
5543 {
5544 /* If we got rid of a DTPMOD/DTPREL reloc
5545 pair then we'll lose one or two dyn
5546 relocs. */
5547 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5548 p->count -= 1;
5549 p->count -= 1;
5550 if (p->count == 0)
5551 *pp = p->next;
5552 break;
5553 }
5554 }
5555
5556 *tls_mask |= tls_set;
5557 *tls_mask &= ~tls_clear;
5558 }
5559
5560 if (elf_section_data (sec)->relocs != relstart)
5561 free (relstart);
5562 }
5563
5564 if (locsyms != NULL
5565 && (elf_tdata (ibfd)->symtab_hdr.contents
5566 != (unsigned char *) locsyms))
5567 {
5568 if (!info->keep_memory)
5569 free (locsyms);
5570 else
5571 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5572 }
5573 }
5574 return TRUE;
5575 }
5576
5577 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5578 will be called from elflink.h. If elflink.h doesn't call our
5579 finish_dynamic_symbol routine, we'll need to do something about
5580 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5581 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5582 ((DYN) \
5583 && ((SHARED) \
5584 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5585 && ((H)->dynindx != -1 \
5586 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5587
5588 /* Allocate space in .plt, .got and associated reloc sections for
5589 dynamic relocs. */
5590
5591 static bfd_boolean
5592 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5593 {
5594 struct bfd_link_info *info;
5595 struct ppc_link_hash_table *htab;
5596 asection *s;
5597 struct ppc_link_hash_entry *eh;
5598 struct ppc_dyn_relocs *p;
5599 struct got_entry *gent;
5600
5601 if (h->root.type == bfd_link_hash_indirect)
5602 return TRUE;
5603
5604 if (h->root.type == bfd_link_hash_warning)
5605 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5606
5607 info = (struct bfd_link_info *) inf;
5608 htab = ppc_hash_table (info);
5609
5610 if (htab->elf.dynamic_sections_created
5611 && h->dynindx != -1
5612 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5613 {
5614 struct plt_entry *pent;
5615 bfd_boolean doneone = FALSE;
5616 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5617 if (pent->plt.refcount > 0)
5618 {
5619 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5620
5621 /* If this is the first .plt entry, make room for the special
5622 first entry. */
5623 s = htab->plt;
5624 if (s->_raw_size == 0)
5625 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5626
5627 pent->plt.offset = s->_raw_size;
5628
5629 /* Make room for this entry. */
5630 s->_raw_size += PLT_ENTRY_SIZE;
5631
5632 /* Make room for the .glink code. */
5633 s = htab->glink;
5634 if (s->_raw_size == 0)
5635 s->_raw_size += GLINK_CALL_STUB_SIZE;
5636 /* We need bigger stubs past index 32767. */
5637 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5638 s->_raw_size += 4;
5639 s->_raw_size += 2*4;
5640
5641 /* We also need to make an entry in the .rela.plt section. */
5642 s = htab->relplt;
5643 s->_raw_size += sizeof (Elf64_External_Rela);
5644 doneone = TRUE;
5645 }
5646 else
5647 pent->plt.offset = (bfd_vma) -1;
5648 if (!doneone)
5649 {
5650 h->plt.plist = NULL;
5651 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5652 }
5653 }
5654 else
5655 {
5656 h->plt.plist = NULL;
5657 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5658 }
5659
5660 eh = (struct ppc_link_hash_entry *) h;
5661 /* Run through the TLS GD got entries first if we're changing them
5662 to TPREL. */
5663 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5664 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5665 if (gent->got.refcount > 0
5666 && (gent->tls_type & TLS_GD) != 0)
5667 {
5668 /* This was a GD entry that has been converted to TPREL. If
5669 there happens to be a TPREL entry we can use that one. */
5670 struct got_entry *ent;
5671 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5672 if (ent->got.refcount > 0
5673 && (ent->tls_type & TLS_TPREL) != 0
5674 && ent->addend == gent->addend
5675 && ent->owner == gent->owner)
5676 {
5677 gent->got.refcount = 0;
5678 break;
5679 }
5680
5681 /* If not, then we'll be using our own TPREL entry. */
5682 if (gent->got.refcount != 0)
5683 gent->tls_type = TLS_TLS | TLS_TPREL;
5684 }
5685
5686 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5687 if (gent->got.refcount > 0)
5688 {
5689 bfd_boolean dyn;
5690
5691 /* Make sure this symbol is output as a dynamic symbol.
5692 Undefined weak syms won't yet be marked as dynamic,
5693 nor will all TLS symbols. */
5694 if (h->dynindx == -1
5695 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5696 {
5697 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5698 return FALSE;
5699 }
5700
5701 if ((gent->tls_type & TLS_LD) != 0
5702 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5703 {
5704 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5705 continue;
5706 }
5707
5708 s = ppc64_elf_tdata (gent->owner)->got;
5709 gent->got.offset = s->_raw_size;
5710 s->_raw_size
5711 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5712 dyn = htab->elf.dynamic_sections_created;
5713 if ((info->shared
5714 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5715 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5716 || h->root.type != bfd_link_hash_undefweak))
5717 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5718 += (gent->tls_type & eh->tls_mask & TLS_GD
5719 ? 2 * sizeof (Elf64_External_Rela)
5720 : sizeof (Elf64_External_Rela));
5721 }
5722 else
5723 gent->got.offset = (bfd_vma) -1;
5724
5725 if (eh->dyn_relocs == NULL)
5726 return TRUE;
5727
5728 /* In the shared -Bsymbolic case, discard space allocated for
5729 dynamic pc-relative relocs against symbols which turn out to be
5730 defined in regular objects. For the normal shared case, discard
5731 space for relocs that have become local due to symbol visibility
5732 changes. */
5733
5734 if (info->shared)
5735 {
5736 /* Relocs that use pc_count are those that appear on a call insn,
5737 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5738 generated via assembly. We want calls to protected symbols to
5739 resolve directly to the function rather than going via the plt.
5740 If people want function pointer comparisons to work as expected
5741 then they should avoid writing weird assembly. */
5742 if (SYMBOL_CALLS_LOCAL (info, h))
5743 {
5744 struct ppc_dyn_relocs **pp;
5745
5746 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5747 {
5748 p->count -= p->pc_count;
5749 p->pc_count = 0;
5750 if (p->count == 0)
5751 *pp = p->next;
5752 else
5753 pp = &p->next;
5754 }
5755 }
5756
5757 /* Also discard relocs on undefined weak syms with non-default
5758 visibility. */
5759 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5760 && h->root.type == bfd_link_hash_undefweak)
5761 eh->dyn_relocs = NULL;
5762 }
5763 else if (ELIMINATE_COPY_RELOCS)
5764 {
5765 /* For the non-shared case, discard space for relocs against
5766 symbols which turn out to need copy relocs or are not
5767 dynamic. */
5768
5769 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5770 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5771 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5772 {
5773 /* Make sure this symbol is output as a dynamic symbol.
5774 Undefined weak syms won't yet be marked as dynamic. */
5775 if (h->dynindx == -1
5776 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5777 {
5778 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5779 return FALSE;
5780 }
5781
5782 /* If that succeeded, we know we'll be keeping all the
5783 relocs. */
5784 if (h->dynindx != -1)
5785 goto keep;
5786 }
5787
5788 eh->dyn_relocs = NULL;
5789
5790 keep: ;
5791 }
5792
5793 /* Finally, allocate space. */
5794 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5795 {
5796 asection *sreloc = elf_section_data (p->sec)->sreloc;
5797 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5798 }
5799
5800 return TRUE;
5801 }
5802
5803 /* Find any dynamic relocs that apply to read-only sections. */
5804
5805 static bfd_boolean
5806 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5807 {
5808 struct ppc_link_hash_entry *eh;
5809 struct ppc_dyn_relocs *p;
5810
5811 if (h->root.type == bfd_link_hash_warning)
5812 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5813
5814 eh = (struct ppc_link_hash_entry *) h;
5815 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5816 {
5817 asection *s = p->sec->output_section;
5818
5819 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5820 {
5821 struct bfd_link_info *info = inf;
5822
5823 info->flags |= DF_TEXTREL;
5824
5825 /* Not an error, just cut short the traversal. */
5826 return FALSE;
5827 }
5828 }
5829 return TRUE;
5830 }
5831
5832 /* Set the sizes of the dynamic sections. */
5833
5834 static bfd_boolean
5835 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5836 struct bfd_link_info *info)
5837 {
5838 struct ppc_link_hash_table *htab;
5839 bfd *dynobj;
5840 asection *s;
5841 bfd_boolean relocs;
5842 bfd *ibfd;
5843
5844 htab = ppc_hash_table (info);
5845 dynobj = htab->elf.dynobj;
5846 if (dynobj == NULL)
5847 abort ();
5848
5849 if (htab->elf.dynamic_sections_created)
5850 {
5851 /* Set the contents of the .interp section to the interpreter. */
5852 if (info->executable)
5853 {
5854 s = bfd_get_section_by_name (dynobj, ".interp");
5855 if (s == NULL)
5856 abort ();
5857 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5858 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5859 }
5860 }
5861
5862 /* Set up .got offsets for local syms, and space for local dynamic
5863 relocs. */
5864 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5865 {
5866 struct got_entry **lgot_ents;
5867 struct got_entry **end_lgot_ents;
5868 char *lgot_masks;
5869 bfd_size_type locsymcount;
5870 Elf_Internal_Shdr *symtab_hdr;
5871 asection *srel;
5872
5873 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5874 continue;
5875
5876 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5877 {
5878 s = ppc64_elf_tdata (ibfd)->got;
5879 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5880 s->_raw_size += 16;
5881 if (info->shared)
5882 {
5883 srel = ppc64_elf_tdata (ibfd)->relgot;
5884 srel->_raw_size += sizeof (Elf64_External_Rela);
5885 }
5886 }
5887 else
5888 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5889
5890 for (s = ibfd->sections; s != NULL; s = s->next)
5891 {
5892 struct ppc_dyn_relocs *p;
5893
5894 for (p = *((struct ppc_dyn_relocs **)
5895 &elf_section_data (s)->local_dynrel);
5896 p != NULL;
5897 p = p->next)
5898 {
5899 if (!bfd_is_abs_section (p->sec)
5900 && bfd_is_abs_section (p->sec->output_section))
5901 {
5902 /* Input section has been discarded, either because
5903 it is a copy of a linkonce section or due to
5904 linker script /DISCARD/, so we'll be discarding
5905 the relocs too. */
5906 }
5907 else if (p->count != 0)
5908 {
5909 srel = elf_section_data (p->sec)->sreloc;
5910 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5911 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5912 info->flags |= DF_TEXTREL;
5913 }
5914 }
5915 }
5916
5917 lgot_ents = elf_local_got_ents (ibfd);
5918 if (!lgot_ents)
5919 continue;
5920
5921 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5922 locsymcount = symtab_hdr->sh_info;
5923 end_lgot_ents = lgot_ents + locsymcount;
5924 lgot_masks = (char *) end_lgot_ents;
5925 s = ppc64_elf_tdata (ibfd)->got;
5926 srel = ppc64_elf_tdata (ibfd)->relgot;
5927 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5928 {
5929 struct got_entry *ent;
5930
5931 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5932 if (ent->got.refcount > 0)
5933 {
5934 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5935 {
5936 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5937 {
5938 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5939 s->_raw_size += 16;
5940 if (info->shared)
5941 srel->_raw_size += sizeof (Elf64_External_Rela);
5942 }
5943 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5944 }
5945 else
5946 {
5947 ent->got.offset = s->_raw_size;
5948 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5949 {
5950 s->_raw_size += 16;
5951 if (info->shared)
5952 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5953 }
5954 else
5955 {
5956 s->_raw_size += 8;
5957 if (info->shared)
5958 srel->_raw_size += sizeof (Elf64_External_Rela);
5959 }
5960 }
5961 }
5962 else
5963 ent->got.offset = (bfd_vma) -1;
5964 }
5965 }
5966
5967 /* Allocate global sym .plt and .got entries, and space for global
5968 sym dynamic relocs. */
5969 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5970
5971 /* We now have determined the sizes of the various dynamic sections.
5972 Allocate memory for them. */
5973 relocs = FALSE;
5974 for (s = dynobj->sections; s != NULL; s = s->next)
5975 {
5976 if ((s->flags & SEC_LINKER_CREATED) == 0)
5977 continue;
5978
5979 /* Reset _cooked_size since prelim layout will set it wrongly,
5980 and a non-zero _cooked_size sticks. */
5981 s->_cooked_size = 0;
5982
5983 if (s == htab->brlt || s == htab->relbrlt)
5984 /* These haven't been allocated yet; don't strip. */
5985 continue;
5986 else if (s == htab->got
5987 || s == htab->plt
5988 || s == htab->glink)
5989 {
5990 /* Strip this section if we don't need it; see the
5991 comment below. */
5992 }
5993 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5994 {
5995 if (s->_raw_size == 0)
5996 {
5997 /* If we don't need this section, strip it from the
5998 output file. This is mostly to handle .rela.bss and
5999 .rela.plt. We must create both sections in
6000 create_dynamic_sections, because they must be created
6001 before the linker maps input sections to output
6002 sections. The linker does that before
6003 adjust_dynamic_symbol is called, and it is that
6004 function which decides whether anything needs to go
6005 into these sections. */
6006 }
6007 else
6008 {
6009 if (s != htab->relplt)
6010 relocs = TRUE;
6011
6012 /* We use the reloc_count field as a counter if we need
6013 to copy relocs into the output file. */
6014 s->reloc_count = 0;
6015 }
6016 }
6017 else
6018 {
6019 /* It's not one of our sections, so don't allocate space. */
6020 continue;
6021 }
6022
6023 if (s->_raw_size == 0)
6024 {
6025 _bfd_strip_section_from_output (info, s);
6026 continue;
6027 }
6028
6029 /* .plt is in the bss section. We don't initialise it. */
6030 if (s == htab->plt)
6031 continue;
6032
6033 /* Allocate memory for the section contents. We use bfd_zalloc
6034 here in case unused entries are not reclaimed before the
6035 section's contents are written out. This should not happen,
6036 but this way if it does we get a R_PPC64_NONE reloc in .rela
6037 sections instead of garbage.
6038 We also rely on the section contents being zero when writing
6039 the GOT. */
6040 s->contents = bfd_zalloc (dynobj, s->_raw_size);
6041 if (s->contents == NULL)
6042 return FALSE;
6043 }
6044
6045 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6046 {
6047 s = ppc64_elf_tdata (ibfd)->got;
6048 if (s != NULL && s != htab->got)
6049 {
6050 s->_cooked_size = 0;
6051 if (s->_raw_size == 0)
6052 _bfd_strip_section_from_output (info, s);
6053 else
6054 {
6055 s->contents = bfd_zalloc (ibfd, s->_raw_size);
6056 if (s->contents == NULL)
6057 return FALSE;
6058 }
6059 }
6060 s = ppc64_elf_tdata (ibfd)->relgot;
6061 if (s != NULL)
6062 {
6063 s->_cooked_size = 0;
6064 if (s->_raw_size == 0)
6065 _bfd_strip_section_from_output (info, s);
6066 else
6067 {
6068 s->contents = bfd_zalloc (ibfd, s->_raw_size);
6069 if (s->contents == NULL)
6070 return FALSE;
6071 relocs = TRUE;
6072 s->reloc_count = 0;
6073 }
6074 }
6075 }
6076
6077 if (htab->elf.dynamic_sections_created)
6078 {
6079 /* Add some entries to the .dynamic section. We fill in the
6080 values later, in ppc64_elf_finish_dynamic_sections, but we
6081 must add the entries now so that we get the correct size for
6082 the .dynamic section. The DT_DEBUG entry is filled in by the
6083 dynamic linker and used by the debugger. */
6084 #define add_dynamic_entry(TAG, VAL) \
6085 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6086
6087 if (info->executable)
6088 {
6089 if (!add_dynamic_entry (DT_DEBUG, 0))
6090 return FALSE;
6091 }
6092
6093 if (htab->plt != NULL && htab->plt->_raw_size != 0)
6094 {
6095 if (!add_dynamic_entry (DT_PLTGOT, 0)
6096 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6097 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6098 || !add_dynamic_entry (DT_JMPREL, 0)
6099 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6100 return FALSE;
6101 }
6102
6103 if (NO_OPD_RELOCS)
6104 {
6105 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6106 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6107 return FALSE;
6108 }
6109
6110 if (relocs)
6111 {
6112 if (!add_dynamic_entry (DT_RELA, 0)
6113 || !add_dynamic_entry (DT_RELASZ, 0)
6114 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6115 return FALSE;
6116
6117 /* If any dynamic relocs apply to a read-only section,
6118 then we need a DT_TEXTREL entry. */
6119 if ((info->flags & DF_TEXTREL) == 0)
6120 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6121
6122 if ((info->flags & DF_TEXTREL) != 0)
6123 {
6124 if (!add_dynamic_entry (DT_TEXTREL, 0))
6125 return FALSE;
6126 }
6127 }
6128 }
6129 #undef add_dynamic_entry
6130
6131 return TRUE;
6132 }
6133
6134 /* Determine the type of stub needed, if any, for a call. */
6135
6136 static inline enum ppc_stub_type
6137 ppc_type_of_stub (asection *input_sec,
6138 const Elf_Internal_Rela *rel,
6139 struct ppc_link_hash_entry **hash,
6140 bfd_vma destination)
6141 {
6142 struct ppc_link_hash_entry *h = *hash;
6143 bfd_vma location;
6144 bfd_vma branch_offset;
6145 bfd_vma max_branch_offset;
6146 enum elf_ppc64_reloc_type r_type;
6147
6148 if (h != NULL)
6149 {
6150 if (h->oh != NULL
6151 && h->oh->dynindx != -1)
6152 {
6153 struct plt_entry *ent;
6154 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6155 if (ent->addend == rel->r_addend
6156 && ent->plt.offset != (bfd_vma) -1)
6157 {
6158 *hash = (struct ppc_link_hash_entry *) h->oh;
6159 return ppc_stub_plt_call;
6160 }
6161 }
6162
6163 if (!(h->elf.root.type == bfd_link_hash_defined
6164 || h->elf.root.type == bfd_link_hash_defweak)
6165 || h->elf.root.u.def.section->output_section == NULL)
6166 return ppc_stub_none;
6167 }
6168
6169 /* Determine where the call point is. */
6170 location = (input_sec->output_offset
6171 + input_sec->output_section->vma
6172 + rel->r_offset);
6173
6174 branch_offset = destination - location;
6175 r_type = ELF64_R_TYPE (rel->r_info);
6176
6177 /* Determine if a long branch stub is needed. */
6178 max_branch_offset = 1 << 25;
6179 if (r_type != R_PPC64_REL24)
6180 max_branch_offset = 1 << 15;
6181
6182 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6183 /* We need a stub. Figure out whether a long_branch or plt_branch
6184 is needed later. */
6185 return ppc_stub_long_branch;
6186
6187 return ppc_stub_none;
6188 }
6189
6190 /* Build a .plt call stub. */
6191
6192 static inline bfd_byte *
6193 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6194 {
6195 #define PPC_LO(v) ((v) & 0xffff)
6196 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6197 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6198
6199 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6200 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6201 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6202 if (PPC_HA (offset + 8) != PPC_HA (offset))
6203 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6204 offset += 8;
6205 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6206 if (PPC_HA (offset + 8) != PPC_HA (offset))
6207 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6208 offset += 8;
6209 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6210 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6211 bfd_put_32 (obfd, BCTR, p), p += 4;
6212 return p;
6213 }
6214
6215 static bfd_boolean
6216 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6217 {
6218 struct ppc_stub_hash_entry *stub_entry;
6219 struct ppc_branch_hash_entry *br_entry;
6220 struct bfd_link_info *info;
6221 struct ppc_link_hash_table *htab;
6222 bfd_byte *loc;
6223 bfd_byte *p;
6224 unsigned int indx;
6225 struct plt_entry *ent;
6226 bfd_vma off;
6227 int size;
6228
6229 /* Massage our args to the form they really have. */
6230 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6231 info = in_arg;
6232
6233 htab = ppc_hash_table (info);
6234
6235 /* Make a note of the offset within the stubs for this entry. */
6236 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size;
6237 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6238
6239 htab->stub_count[stub_entry->stub_type - 1] += 1;
6240 switch (stub_entry->stub_type)
6241 {
6242 case ppc_stub_long_branch:
6243 case ppc_stub_long_branch_r2off:
6244 /* Branches are relative. This is where we are going to. */
6245 off = (stub_entry->target_value
6246 + stub_entry->target_section->output_offset
6247 + stub_entry->target_section->output_section->vma);
6248
6249 /* And this is where we are coming from. */
6250 off -= (stub_entry->stub_offset
6251 + stub_entry->stub_sec->output_offset
6252 + stub_entry->stub_sec->output_section->vma);
6253
6254 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6255 size = 4;
6256 else
6257 {
6258 bfd_vma r2off;
6259
6260 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6261 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6262 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6263 loc += 4;
6264 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6265 loc += 4;
6266 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6267 loc += 4;
6268 off -= 12;
6269 size = 16;
6270 }
6271 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6272
6273 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6274 break;
6275
6276 case ppc_stub_plt_branch:
6277 case ppc_stub_plt_branch_r2off:
6278 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6279 stub_entry->root.string + 9,
6280 FALSE, FALSE);
6281 if (br_entry == NULL)
6282 {
6283 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6284 stub_entry->root.string + 9);
6285 htab->stub_error = TRUE;
6286 return FALSE;
6287 }
6288
6289 off = (stub_entry->target_value
6290 + stub_entry->target_section->output_offset
6291 + stub_entry->target_section->output_section->vma);
6292
6293 bfd_put_64 (htab->brlt->owner, off,
6294 htab->brlt->contents + br_entry->offset);
6295
6296 if (info->shared)
6297 {
6298 /* Create a reloc for the branch lookup table entry. */
6299 Elf_Internal_Rela rela;
6300 bfd_byte *rl;
6301
6302 rela.r_offset = (br_entry->offset
6303 + htab->brlt->output_offset
6304 + htab->brlt->output_section->vma);
6305 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6306 rela.r_addend = off;
6307
6308 rl = htab->relbrlt->contents;
6309 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6310 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6311 }
6312
6313 off = (br_entry->offset
6314 + htab->brlt->output_offset
6315 + htab->brlt->output_section->vma
6316 - elf_gp (htab->brlt->output_section->owner)
6317 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6318
6319 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6320 {
6321 (*_bfd_error_handler)
6322 (_("linkage table error against `%s'"),
6323 stub_entry->root.string);
6324 bfd_set_error (bfd_error_bad_value);
6325 htab->stub_error = TRUE;
6326 return FALSE;
6327 }
6328
6329 indx = off;
6330 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6331 {
6332 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6333 loc += 4;
6334 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6335 size = 16;
6336 }
6337 else
6338 {
6339 bfd_vma r2off;
6340
6341 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6342 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6343 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6344 loc += 4;
6345 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6346 loc += 4;
6347 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6348 loc += 4;
6349 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6350 loc += 4;
6351 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6352 size = 28;
6353 }
6354 loc += 4;
6355 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6356 loc += 4;
6357 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6358 break;
6359
6360 case ppc_stub_plt_call:
6361 /* Do the best we can for shared libraries built without
6362 exporting ".foo" for each "foo". This can happen when symbol
6363 versioning scripts strip all bar a subset of symbols. */
6364 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6365 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6366 {
6367 /* Point the symbol at the stub. There may be multiple stubs,
6368 we don't really care; The main thing is to make this sym
6369 defined somewhere. Maybe defining the symbol in the stub
6370 section is a silly idea. If we didn't do this, htab->top_id
6371 could disappear. */
6372 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6373 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6374 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6375 }
6376
6377 /* Now build the stub. */
6378 off = (bfd_vma) -1;
6379 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6380 if (ent->addend == stub_entry->addend)
6381 {
6382 off = ent->plt.offset;
6383 break;
6384 }
6385 if (off >= (bfd_vma) -2)
6386 abort ();
6387
6388 off &= ~ (bfd_vma) 1;
6389 off += (htab->plt->output_offset
6390 + htab->plt->output_section->vma
6391 - elf_gp (htab->plt->output_section->owner)
6392 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6393
6394 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6395 {
6396 (*_bfd_error_handler)
6397 (_("linkage table error against `%s'"),
6398 stub_entry->h->elf.root.root.string);
6399 bfd_set_error (bfd_error_bad_value);
6400 htab->stub_error = TRUE;
6401 return FALSE;
6402 }
6403
6404 p = build_plt_stub (htab->stub_bfd, loc, off);
6405 size = p - loc;
6406 break;
6407
6408 default:
6409 BFD_FAIL ();
6410 return FALSE;
6411 }
6412
6413 stub_entry->stub_sec->_cooked_size += size;
6414
6415 if (htab->emit_stub_syms
6416 && !(stub_entry->stub_type == ppc_stub_plt_call
6417 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6418 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6419 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6420 {
6421 struct elf_link_hash_entry *h;
6422 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6423 TRUE, FALSE, FALSE);
6424 if (h == NULL)
6425 return FALSE;
6426 if (h->root.type == bfd_link_hash_new)
6427 {
6428 h->root.type = bfd_link_hash_defined;
6429 h->root.u.def.section = stub_entry->stub_sec;
6430 h->root.u.def.value = stub_entry->stub_offset;
6431 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6432 | ELF_LINK_HASH_DEF_REGULAR
6433 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6434 | ELF_LINK_FORCED_LOCAL);
6435 }
6436 }
6437
6438 return TRUE;
6439 }
6440
6441 /* As above, but don't actually build the stub. Just bump offset so
6442 we know stub section sizes, and select plt_branch stubs where
6443 long_branch stubs won't do. */
6444
6445 static bfd_boolean
6446 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6447 {
6448 struct ppc_stub_hash_entry *stub_entry;
6449 struct bfd_link_info *info;
6450 struct ppc_link_hash_table *htab;
6451 bfd_vma off;
6452 int size;
6453
6454 /* Massage our args to the form they really have. */
6455 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6456 info = in_arg;
6457
6458 htab = ppc_hash_table (info);
6459
6460 if (stub_entry->stub_type == ppc_stub_plt_call)
6461 {
6462 struct plt_entry *ent;
6463 off = (bfd_vma) -1;
6464 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6465 if (ent->addend == stub_entry->addend)
6466 {
6467 off = ent->plt.offset & ~(bfd_vma) 1;
6468 break;
6469 }
6470 if (off >= (bfd_vma) -2)
6471 abort ();
6472 off += (htab->plt->output_offset
6473 + htab->plt->output_section->vma
6474 - elf_gp (htab->plt->output_section->owner)
6475 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6476
6477 size = PLT_CALL_STUB_SIZE;
6478 if (PPC_HA (off + 16) != PPC_HA (off))
6479 size += 4;
6480 }
6481 else
6482 {
6483 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6484 variants. */
6485 off = (stub_entry->target_value
6486 + stub_entry->target_section->output_offset
6487 + stub_entry->target_section->output_section->vma);
6488 off -= (stub_entry->stub_sec->_raw_size
6489 + stub_entry->stub_sec->output_offset
6490 + stub_entry->stub_sec->output_section->vma);
6491
6492 /* Reset the stub type from the plt variant in case we now
6493 can reach with a shorter stub. */
6494 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6495 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6496
6497 size = 4;
6498 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6499 {
6500 off -= 12;
6501 size = 16;
6502 }
6503
6504 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6505 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6506 {
6507 struct ppc_branch_hash_entry *br_entry;
6508
6509 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6510 stub_entry->root.string + 9,
6511 TRUE, FALSE);
6512 if (br_entry == NULL)
6513 {
6514 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6515 stub_entry->root.string + 9);
6516 htab->stub_error = TRUE;
6517 return FALSE;
6518 }
6519
6520 if (br_entry->iter != htab->stub_iteration)
6521 {
6522 br_entry->iter = htab->stub_iteration;
6523 br_entry->offset = htab->brlt->_raw_size;
6524 htab->brlt->_raw_size += 8;
6525
6526 if (info->shared)
6527 htab->relbrlt->_raw_size += sizeof (Elf64_External_Rela);
6528 }
6529
6530 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6531 size = 16;
6532 if (stub_entry->stub_type != ppc_stub_plt_branch)
6533 size = 28;
6534 }
6535 }
6536
6537 stub_entry->stub_sec->_raw_size += size;
6538 return TRUE;
6539 }
6540
6541 /* Set up various things so that we can make a list of input sections
6542 for each output section included in the link. Returns -1 on error,
6543 0 when no stubs will be needed, and 1 on success. */
6544
6545 int
6546 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6547 {
6548 bfd *input_bfd;
6549 int top_id, top_index, id;
6550 asection *section;
6551 asection **input_list;
6552 bfd_size_type amt;
6553 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6554
6555 if (htab->brlt == NULL)
6556 return 0;
6557
6558 /* Find the top input section id. */
6559 for (input_bfd = info->input_bfds, top_id = 3;
6560 input_bfd != NULL;
6561 input_bfd = input_bfd->link_next)
6562 {
6563 for (section = input_bfd->sections;
6564 section != NULL;
6565 section = section->next)
6566 {
6567 if (top_id < section->id)
6568 top_id = section->id;
6569 }
6570 }
6571
6572 htab->top_id = top_id;
6573 amt = sizeof (struct map_stub) * (top_id + 1);
6574 htab->stub_group = bfd_zmalloc (amt);
6575 if (htab->stub_group == NULL)
6576 return -1;
6577
6578 /* Set toc_off for com, und, abs and ind sections. */
6579 for (id = 0; id < 3; id++)
6580 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6581
6582 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6583
6584 /* We can't use output_bfd->section_count here to find the top output
6585 section index as some sections may have been removed, and
6586 _bfd_strip_section_from_output doesn't renumber the indices. */
6587 for (section = output_bfd->sections, top_index = 0;
6588 section != NULL;
6589 section = section->next)
6590 {
6591 if (top_index < section->index)
6592 top_index = section->index;
6593 }
6594
6595 htab->top_index = top_index;
6596 amt = sizeof (asection *) * (top_index + 1);
6597 input_list = bfd_zmalloc (amt);
6598 htab->input_list = input_list;
6599 if (input_list == NULL)
6600 return -1;
6601
6602 return 1;
6603 }
6604
6605 /* The linker repeatedly calls this function for each TOC input section
6606 and linker generated GOT section. Group input bfds such that the toc
6607 within a group is less than 64k in size. Will break with cute linker
6608 scripts that play games with dot in the output toc section. */
6609
6610 void
6611 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6612 {
6613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6614
6615 if (!htab->no_multi_toc)
6616 {
6617 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6618 bfd_vma off = addr - htab->toc_curr;
6619 if (off + isec->_raw_size > 0x10000)
6620 {
6621 htab->toc_curr = addr;
6622 htab->multi_toc_needed = 1;
6623 }
6624 elf_gp (isec->owner) = (htab->toc_curr
6625 - elf_gp (isec->output_section->owner)
6626 + TOC_BASE_OFF);
6627 }
6628 }
6629
6630 /* Called after the last call to the above function. */
6631
6632 void
6633 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6634 struct bfd_link_info *info)
6635 {
6636 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6637
6638 /* toc_curr tracks the TOC offset used for code sections below in
6639 ppc64_elf_next_input_section. Start off at 0x8000. */
6640 htab->toc_curr = TOC_BASE_OFF;
6641 }
6642
6643 /* No toc references were found in ISEC. If the code in ISEC makes no
6644 calls, then there's no need to use toc adjusting stubs when branching
6645 into ISEC. Actually, indirect calls from ISEC are OK as they will
6646 load r2. */
6647
6648 static int
6649 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6650 {
6651 bfd_byte *contents;
6652 bfd_size_type i;
6653 int ret;
6654 int branch_ok;
6655
6656 /* We know none of our code bearing sections will need toc stubs. */
6657 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6658 return 0;
6659
6660 if (isec->_raw_size == 0)
6661 return 0;
6662
6663 /* Hack for linux kernel. .fixup contains branches, but only back to
6664 the function that hit an exception. */
6665 branch_ok = strcmp (isec->name, ".fixup") == 0;
6666
6667 contents = elf_section_data (isec)->this_hdr.contents;
6668 if (contents == NULL)
6669 {
6670 contents = bfd_malloc (isec->_raw_size);
6671 if (contents == NULL)
6672 return -1;
6673 if (! bfd_get_section_contents (isec->owner, isec, contents,
6674 0, isec->_raw_size))
6675 {
6676 free (contents);
6677 return -1;
6678 }
6679 if (info->keep_memory)
6680 elf_section_data (isec)->this_hdr.contents = contents;
6681 }
6682
6683 /* Code scan, because we don't necessarily have relocs on calls to
6684 static functions. */
6685 ret = 0;
6686 for (i = 0; i < isec->_raw_size; i += 4)
6687 {
6688 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6689 /* Is this a branch? */
6690 if ((insn & (0x3f << 26)) == (18 << 26)
6691 /* If branch and link, it's a function call. */
6692 && ((insn & 1) != 0
6693 /* Sibling calls use a plain branch. I don't know a way
6694 of deciding whether a branch is really a sibling call. */
6695 || !branch_ok))
6696 {
6697 ret = 1;
6698 break;
6699 }
6700 }
6701
6702 if (elf_section_data (isec)->this_hdr.contents != contents)
6703 free (contents);
6704 return ret;
6705 }
6706
6707 /* The linker repeatedly calls this function for each input section,
6708 in the order that input sections are linked into output sections.
6709 Build lists of input sections to determine groupings between which
6710 we may insert linker stubs. */
6711
6712 bfd_boolean
6713 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6714 {
6715 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6716 int ret;
6717
6718 if ((isec->output_section->flags & SEC_CODE) != 0
6719 && isec->output_section->index <= htab->top_index)
6720 {
6721 asection **list = htab->input_list + isec->output_section->index;
6722 /* Steal the link_sec pointer for our list. */
6723 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6724 /* This happens to make the list in reverse order,
6725 which is what we want. */
6726 PREV_SEC (isec) = *list;
6727 *list = isec;
6728 }
6729
6730 /* If a code section has a function that uses the TOC then we need
6731 to use the right TOC (obviously). Also, make sure that .opd gets
6732 the correct TOC value for R_PPC64_TOC relocs that don't have or
6733 can't find their function symbol (shouldn't ever happen now). */
6734 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6735 {
6736 if (elf_gp (isec->owner) != 0)
6737 htab->toc_curr = elf_gp (isec->owner);
6738 }
6739 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6740 return FALSE;
6741 else
6742 isec->has_gp_reloc = ret;
6743
6744 /* Functions that don't use the TOC can belong in any TOC group.
6745 Use the last TOC base. This happens to make _init and _fini
6746 pasting work. */
6747 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6748 return TRUE;
6749 }
6750
6751 /* See whether we can group stub sections together. Grouping stub
6752 sections may result in fewer stubs. More importantly, we need to
6753 put all .init* and .fini* stubs at the beginning of the .init or
6754 .fini output sections respectively, because glibc splits the
6755 _init and _fini functions into multiple parts. Putting a stub in
6756 the middle of a function is not a good idea. */
6757
6758 static void
6759 group_sections (struct ppc_link_hash_table *htab,
6760 bfd_size_type stub_group_size,
6761 bfd_boolean stubs_always_before_branch)
6762 {
6763 asection **list = htab->input_list + htab->top_index;
6764 do
6765 {
6766 asection *tail = *list;
6767 while (tail != NULL)
6768 {
6769 asection *curr;
6770 asection *prev;
6771 bfd_size_type total;
6772 bfd_boolean big_sec;
6773 bfd_vma curr_toc;
6774
6775 curr = tail;
6776 if (tail->_cooked_size)
6777 total = tail->_cooked_size;
6778 else
6779 total = tail->_raw_size;
6780 big_sec = total >= stub_group_size;
6781 curr_toc = htab->stub_group[tail->id].toc_off;
6782
6783 while ((prev = PREV_SEC (curr)) != NULL
6784 && ((total += curr->output_offset - prev->output_offset)
6785 < stub_group_size)
6786 && htab->stub_group[prev->id].toc_off == curr_toc)
6787 curr = prev;
6788
6789 /* OK, the size from the start of CURR to the end is less
6790 than stub_group_size and thus can be handled by one stub
6791 section. (or the tail section is itself larger than
6792 stub_group_size, in which case we may be toast.) We
6793 should really be keeping track of the total size of stubs
6794 added here, as stubs contribute to the final output
6795 section size. That's a little tricky, and this way will
6796 only break if stubs added make the total size more than
6797 2^25, ie. for the default stub_group_size, if stubs total
6798 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6799 do
6800 {
6801 prev = PREV_SEC (tail);
6802 /* Set up this stub group. */
6803 htab->stub_group[tail->id].link_sec = curr;
6804 }
6805 while (tail != curr && (tail = prev) != NULL);
6806
6807 /* But wait, there's more! Input sections up to stub_group_size
6808 bytes before the stub section can be handled by it too.
6809 Don't do this if we have a really large section after the
6810 stubs, as adding more stubs increases the chance that
6811 branches may not reach into the stub section. */
6812 if (!stubs_always_before_branch && !big_sec)
6813 {
6814 total = 0;
6815 while (prev != NULL
6816 && ((total += tail->output_offset - prev->output_offset)
6817 < stub_group_size)
6818 && htab->stub_group[prev->id].toc_off == curr_toc)
6819 {
6820 tail = prev;
6821 prev = PREV_SEC (tail);
6822 htab->stub_group[tail->id].link_sec = curr;
6823 }
6824 }
6825 tail = prev;
6826 }
6827 }
6828 while (list-- != htab->input_list);
6829 free (htab->input_list);
6830 #undef PREV_SEC
6831 }
6832
6833 /* Determine and set the size of the stub section for a final link.
6834
6835 The basic idea here is to examine all the relocations looking for
6836 PC-relative calls to a target that is unreachable with a "bl"
6837 instruction. */
6838
6839 bfd_boolean
6840 ppc64_elf_size_stubs (bfd *output_bfd,
6841 struct bfd_link_info *info,
6842 bfd_signed_vma group_size,
6843 asection *(*add_stub_section) (const char *, asection *),
6844 void (*layout_sections_again) (void))
6845 {
6846 bfd_size_type stub_group_size;
6847 bfd_boolean stubs_always_before_branch;
6848 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6849
6850 /* Stash our params away. */
6851 htab->add_stub_section = add_stub_section;
6852 htab->layout_sections_again = layout_sections_again;
6853 stubs_always_before_branch = group_size < 0;
6854 if (group_size < 0)
6855 stub_group_size = -group_size;
6856 else
6857 stub_group_size = group_size;
6858 if (stub_group_size == 1)
6859 {
6860 /* Default values. */
6861 if (stubs_always_before_branch)
6862 {
6863 stub_group_size = 0x1e00000;
6864 if (htab->has_14bit_branch)
6865 stub_group_size = 0x7800;
6866 }
6867 else
6868 {
6869 stub_group_size = 0x1c00000;
6870 if (htab->has_14bit_branch)
6871 stub_group_size = 0x7000;
6872 }
6873 }
6874
6875 group_sections (htab, stub_group_size, stubs_always_before_branch);
6876
6877 while (1)
6878 {
6879 bfd *input_bfd;
6880 unsigned int bfd_indx;
6881 asection *stub_sec;
6882 bfd_boolean stub_changed;
6883
6884 htab->stub_iteration += 1;
6885 stub_changed = FALSE;
6886
6887 for (input_bfd = info->input_bfds, bfd_indx = 0;
6888 input_bfd != NULL;
6889 input_bfd = input_bfd->link_next, bfd_indx++)
6890 {
6891 Elf_Internal_Shdr *symtab_hdr;
6892 asection *section;
6893 Elf_Internal_Sym *local_syms = NULL;
6894
6895 /* We'll need the symbol table in a second. */
6896 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6897 if (symtab_hdr->sh_info == 0)
6898 continue;
6899
6900 /* Walk over each section attached to the input bfd. */
6901 for (section = input_bfd->sections;
6902 section != NULL;
6903 section = section->next)
6904 {
6905 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6906
6907 /* If there aren't any relocs, then there's nothing more
6908 to do. */
6909 if ((section->flags & SEC_RELOC) == 0
6910 || section->reloc_count == 0)
6911 continue;
6912
6913 /* If this section is a link-once section that will be
6914 discarded, then don't create any stubs. */
6915 if (section->output_section == NULL
6916 || section->output_section->owner != output_bfd)
6917 continue;
6918
6919 /* Get the relocs. */
6920 internal_relocs
6921 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6922 info->keep_memory);
6923 if (internal_relocs == NULL)
6924 goto error_ret_free_local;
6925
6926 /* Now examine each relocation. */
6927 irela = internal_relocs;
6928 irelaend = irela + section->reloc_count;
6929 for (; irela < irelaend; irela++)
6930 {
6931 enum elf_ppc64_reloc_type r_type;
6932 unsigned int r_indx;
6933 enum ppc_stub_type stub_type;
6934 struct ppc_stub_hash_entry *stub_entry;
6935 asection *sym_sec;
6936 bfd_vma sym_value;
6937 bfd_vma destination;
6938 struct ppc_link_hash_entry *hash;
6939 struct elf_link_hash_entry *h;
6940 Elf_Internal_Sym *sym;
6941 char *stub_name;
6942 const asection *id_sec;
6943
6944 r_type = ELF64_R_TYPE (irela->r_info);
6945 r_indx = ELF64_R_SYM (irela->r_info);
6946
6947 if (r_type >= R_PPC64_max)
6948 {
6949 bfd_set_error (bfd_error_bad_value);
6950 goto error_ret_free_internal;
6951 }
6952
6953 /* Only look for stubs on branch instructions. */
6954 if (r_type != R_PPC64_REL24
6955 && r_type != R_PPC64_REL14
6956 && r_type != R_PPC64_REL14_BRTAKEN
6957 && r_type != R_PPC64_REL14_BRNTAKEN)
6958 continue;
6959
6960 /* Now determine the call target, its name, value,
6961 section. */
6962 destination = 0;
6963 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6964 r_indx, input_bfd))
6965 goto error_ret_free_internal;
6966 hash = (struct ppc_link_hash_entry *) h;
6967
6968 if (hash == NULL)
6969 {
6970 /* It's a local symbol. */
6971 sym_value = sym->st_value;
6972 destination = (sym_value + irela->r_addend
6973 + sym_sec->output_offset
6974 + sym_sec->output_section->vma);
6975 }
6976 else
6977 {
6978 /* It's an external symbol. */
6979 sym_value = 0;
6980 if (hash->elf.root.type == bfd_link_hash_defined
6981 || hash->elf.root.type == bfd_link_hash_defweak)
6982 {
6983 sym_value = hash->elf.root.u.def.value;
6984 if (sym_sec->output_section != NULL)
6985 destination = (sym_value + irela->r_addend
6986 + sym_sec->output_offset
6987 + sym_sec->output_section->vma);
6988 }
6989 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6990 ;
6991 else if (hash->elf.root.type == bfd_link_hash_undefined)
6992 ;
6993 else
6994 {
6995 bfd_set_error (bfd_error_bad_value);
6996 goto error_ret_free_internal;
6997 }
6998 }
6999
7000 /* Determine what (if any) linker stub is needed. */
7001 stub_type = ppc_type_of_stub (section, irela, &hash,
7002 destination);
7003
7004 if (stub_type != ppc_stub_plt_call)
7005 {
7006 /* Check whether we need a TOC adjusting stub.
7007 Since the linker pastes together pieces from
7008 different object files when creating the
7009 _init and _fini functions, it may be that a
7010 call to what looks like a local sym is in
7011 fact a call needing a TOC adjustment. */
7012 if (sym_sec != NULL
7013 && sym_sec->output_section != NULL
7014 && (htab->stub_group[sym_sec->id].toc_off
7015 != htab->stub_group[section->id].toc_off)
7016 && sym_sec->has_gp_reloc
7017 && section->has_gp_reloc)
7018 stub_type = ppc_stub_long_branch_r2off;
7019 }
7020
7021 if (stub_type == ppc_stub_none)
7022 continue;
7023
7024 /* __tls_get_addr calls might be eliminated. */
7025 if (stub_type != ppc_stub_plt_call
7026 && hash != NULL
7027 && &hash->elf == htab->tls_get_addr
7028 && section->has_tls_reloc
7029 && irela != internal_relocs)
7030 {
7031 /* Get tls info. */
7032 char *tls_mask;
7033
7034 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
7035 irela - 1, input_bfd))
7036 goto error_ret_free_internal;
7037 if (*tls_mask != 0)
7038 continue;
7039 }
7040
7041 /* Support for grouping stub sections. */
7042 id_sec = htab->stub_group[section->id].link_sec;
7043
7044 /* Get the name of this stub. */
7045 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
7046 if (!stub_name)
7047 goto error_ret_free_internal;
7048
7049 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
7050 stub_name, FALSE, FALSE);
7051 if (stub_entry != NULL)
7052 {
7053 /* The proper stub has already been created. */
7054 free (stub_name);
7055 continue;
7056 }
7057
7058 stub_entry = ppc_add_stub (stub_name, section, htab);
7059 if (stub_entry == NULL)
7060 {
7061 free (stub_name);
7062 error_ret_free_internal:
7063 if (elf_section_data (section)->relocs == NULL)
7064 free (internal_relocs);
7065 error_ret_free_local:
7066 if (local_syms != NULL
7067 && (symtab_hdr->contents
7068 != (unsigned char *) local_syms))
7069 free (local_syms);
7070 return FALSE;
7071 }
7072
7073 stub_entry->stub_type = stub_type;
7074 stub_entry->target_value = sym_value;
7075 stub_entry->target_section = sym_sec;
7076 stub_entry->h = hash;
7077 stub_entry->addend = irela->r_addend;
7078 stub_changed = TRUE;
7079 }
7080
7081 /* We're done with the internal relocs, free them. */
7082 if (elf_section_data (section)->relocs != internal_relocs)
7083 free (internal_relocs);
7084 }
7085
7086 if (local_syms != NULL
7087 && symtab_hdr->contents != (unsigned char *) local_syms)
7088 {
7089 if (!info->keep_memory)
7090 free (local_syms);
7091 else
7092 symtab_hdr->contents = (unsigned char *) local_syms;
7093 }
7094 }
7095
7096 if (!stub_changed)
7097 break;
7098
7099 /* OK, we've added some stubs. Find out the new size of the
7100 stub sections. */
7101 for (stub_sec = htab->stub_bfd->sections;
7102 stub_sec != NULL;
7103 stub_sec = stub_sec->next)
7104 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7105 {
7106 stub_sec->_raw_size = 0;
7107 stub_sec->_cooked_size = 0;
7108 }
7109 htab->brlt->_raw_size = 0;
7110 htab->brlt->_cooked_size = 0;
7111 if (info->shared)
7112 {
7113 htab->relbrlt->_raw_size = 0;
7114 htab->relbrlt->_cooked_size = 0;
7115 }
7116
7117 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
7118
7119 /* Ask the linker to do its stuff. */
7120 (*htab->layout_sections_again) ();
7121 }
7122
7123 /* It would be nice to strip .branch_lt from the output if the
7124 section is empty, but it's too late. If we strip sections here,
7125 the dynamic symbol table is corrupted since the section symbol
7126 for the stripped section isn't written. */
7127
7128 return TRUE;
7129 }
7130
7131 /* Called after we have determined section placement. If sections
7132 move, we'll be called again. Provide a value for TOCstart. */
7133
7134 bfd_vma
7135 ppc64_elf_toc (bfd *obfd)
7136 {
7137 asection *s;
7138 bfd_vma TOCstart;
7139
7140 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7141 order. The TOC starts where the first of these sections starts. */
7142 s = bfd_get_section_by_name (obfd, ".got");
7143 if (s == NULL)
7144 s = bfd_get_section_by_name (obfd, ".toc");
7145 if (s == NULL)
7146 s = bfd_get_section_by_name (obfd, ".tocbss");
7147 if (s == NULL)
7148 s = bfd_get_section_by_name (obfd, ".plt");
7149 if (s == NULL)
7150 {
7151 /* This may happen for
7152 o references to TOC base (SYM@toc / TOC[tc0]) without a
7153 .toc directive
7154 o bad linker script
7155 o --gc-sections and empty TOC sections
7156
7157 FIXME: Warn user? */
7158
7159 /* Look for a likely section. We probably won't even be
7160 using TOCstart. */
7161 for (s = obfd->sections; s != NULL; s = s->next)
7162 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7163 == (SEC_ALLOC | SEC_SMALL_DATA))
7164 break;
7165 if (s == NULL)
7166 for (s = obfd->sections; s != NULL; s = s->next)
7167 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7168 == (SEC_ALLOC | SEC_SMALL_DATA))
7169 break;
7170 if (s == NULL)
7171 for (s = obfd->sections; s != NULL; s = s->next)
7172 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7173 break;
7174 if (s == NULL)
7175 for (s = obfd->sections; s != NULL; s = s->next)
7176 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7177 break;
7178 }
7179
7180 TOCstart = 0;
7181 if (s != NULL)
7182 TOCstart = s->output_section->vma + s->output_offset;
7183
7184 return TOCstart;
7185 }
7186
7187 /* Build all the stubs associated with the current output file.
7188 The stubs are kept in a hash table attached to the main linker
7189 hash table. This function is called via gldelf64ppc_finish. */
7190
7191 bfd_boolean
7192 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7193 struct bfd_link_info *info,
7194 char **stats)
7195 {
7196 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7197 asection *stub_sec;
7198 bfd_byte *p;
7199 int stub_sec_count = 0;
7200
7201 htab->emit_stub_syms = emit_stub_syms;
7202 for (stub_sec = htab->stub_bfd->sections;
7203 stub_sec != NULL;
7204 stub_sec = stub_sec->next)
7205 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7206 {
7207 bfd_size_type size;
7208
7209 /* Allocate memory to hold the linker stubs. */
7210 size = stub_sec->_raw_size;
7211 if (size != 0)
7212 {
7213 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7214 if (stub_sec->contents == NULL)
7215 return FALSE;
7216 }
7217 stub_sec->_cooked_size = 0;
7218 }
7219
7220 if (htab->plt != NULL)
7221 {
7222 unsigned int indx;
7223 bfd_vma plt0;
7224
7225 /* Build the .glink plt call stub. */
7226 plt0 = (htab->plt->output_section->vma
7227 + htab->plt->output_offset
7228 - (htab->glink->output_section->vma
7229 + htab->glink->output_offset
7230 + GLINK_CALL_STUB_SIZE));
7231 if (plt0 + 0x80008000 > 0xffffffff)
7232 {
7233 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7234 bfd_set_error (bfd_error_bad_value);
7235 return FALSE;
7236 }
7237
7238 if (htab->emit_stub_syms)
7239 {
7240 struct elf_link_hash_entry *h;
7241 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7242 if (h == NULL)
7243 return FALSE;
7244 if (h->root.type == bfd_link_hash_new)
7245 {
7246 h->root.type = bfd_link_hash_defined;
7247 h->root.u.def.section = htab->glink;
7248 h->root.u.def.value = 0;
7249 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7250 | ELF_LINK_HASH_DEF_REGULAR
7251 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7252 | ELF_LINK_FORCED_LOCAL);
7253 }
7254 }
7255 p = htab->glink->contents;
7256 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7257 p += 4;
7258 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7259 p += 4;
7260 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7261 p += 4;
7262 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7263 p += 4;
7264 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7265 p += 4;
7266 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7267 p += 4;
7268 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7269 p += 4;
7270 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7271 p += 4;
7272 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7273 p += 4;
7274 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7275 p += 4;
7276 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7277 p += 4;
7278 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7279 p += 4;
7280 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7281 p += 4;
7282 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7283 p += 4;
7284 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7285 p += 4;
7286 bfd_put_32 (htab->glink->owner, BCTR, p);
7287 p += 4;
7288
7289 /* Build the .glink lazy link call stubs. */
7290 indx = 0;
7291 while (p < htab->glink->contents + htab->glink->_raw_size)
7292 {
7293 if (indx < 0x8000)
7294 {
7295 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7296 p += 4;
7297 }
7298 else
7299 {
7300 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7301 p += 4;
7302 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7303 p += 4;
7304 }
7305 bfd_put_32 (htab->glink->owner,
7306 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7307 indx++;
7308 p += 4;
7309 }
7310 htab->glink->_cooked_size = p - htab->glink->contents;
7311 }
7312
7313 if (htab->brlt->_raw_size != 0)
7314 {
7315 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7316 htab->brlt->_raw_size);
7317 if (htab->brlt->contents == NULL)
7318 return FALSE;
7319 }
7320 if (info->shared && htab->relbrlt->_raw_size != 0)
7321 {
7322 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
7323 htab->relbrlt->_raw_size);
7324 if (htab->relbrlt->contents == NULL)
7325 return FALSE;
7326 }
7327
7328 /* Build the stubs as directed by the stub hash table. */
7329 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7330
7331 for (stub_sec = htab->stub_bfd->sections;
7332 stub_sec != NULL;
7333 stub_sec = stub_sec->next)
7334 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7335 {
7336 stub_sec_count += 1;
7337 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7338 break;
7339 }
7340
7341 if (stub_sec != NULL
7342 || htab->glink->_raw_size != htab->glink->_cooked_size)
7343 {
7344 htab->stub_error = TRUE;
7345 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7346 }
7347
7348 if (htab->stub_error)
7349 return FALSE;
7350
7351 if (stats != NULL)
7352 {
7353 *stats = bfd_malloc (500);
7354 if (*stats == NULL)
7355 return FALSE;
7356
7357 sprintf (*stats, _("linker stubs in %u groups\n"
7358 " branch %lu\n"
7359 " toc adjust %lu\n"
7360 " long branch %lu\n"
7361 " long toc adj %lu\n"
7362 " plt call %lu"),
7363 stub_sec_count,
7364 htab->stub_count[ppc_stub_long_branch - 1],
7365 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7366 htab->stub_count[ppc_stub_plt_branch - 1],
7367 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7368 htab->stub_count[ppc_stub_plt_call - 1]);
7369 }
7370 return TRUE;
7371 }
7372
7373 /* The RELOCATE_SECTION function is called by the ELF backend linker
7374 to handle the relocations for a section.
7375
7376 The relocs are always passed as Rela structures; if the section
7377 actually uses Rel structures, the r_addend field will always be
7378 zero.
7379
7380 This function is responsible for adjust the section contents as
7381 necessary, and (if using Rela relocs and generating a
7382 relocatable output file) adjusting the reloc addend as
7383 necessary.
7384
7385 This function does not have to worry about setting the reloc
7386 address or the reloc symbol index.
7387
7388 LOCAL_SYMS is a pointer to the swapped in local symbols.
7389
7390 LOCAL_SECTIONS is an array giving the section in the input file
7391 corresponding to the st_shndx field of each local symbol.
7392
7393 The global hash table entry for the global symbols can be found
7394 via elf_sym_hashes (input_bfd).
7395
7396 When generating relocatable output, this function must handle
7397 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7398 going to be the section symbol corresponding to the output
7399 section, which means that the addend must be adjusted
7400 accordingly. */
7401
7402 static bfd_boolean
7403 ppc64_elf_relocate_section (bfd *output_bfd,
7404 struct bfd_link_info *info,
7405 bfd *input_bfd,
7406 asection *input_section,
7407 bfd_byte *contents,
7408 Elf_Internal_Rela *relocs,
7409 Elf_Internal_Sym *local_syms,
7410 asection **local_sections)
7411 {
7412 struct ppc_link_hash_table *htab;
7413 Elf_Internal_Shdr *symtab_hdr;
7414 struct elf_link_hash_entry **sym_hashes;
7415 Elf_Internal_Rela *rel;
7416 Elf_Internal_Rela *relend;
7417 Elf_Internal_Rela outrel;
7418 bfd_byte *loc;
7419 struct got_entry **local_got_ents;
7420 bfd_vma TOCstart;
7421 bfd_boolean ret = TRUE;
7422 bfd_boolean is_opd;
7423 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7424 bfd_boolean is_power4 = FALSE;
7425
7426 if (info->relocatable)
7427 return TRUE;
7428
7429 /* Initialize howto table if needed. */
7430 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7431 ppc_howto_init ();
7432
7433 htab = ppc_hash_table (info);
7434 local_got_ents = elf_local_got_ents (input_bfd);
7435 TOCstart = elf_gp (output_bfd);
7436 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7437 sym_hashes = elf_sym_hashes (input_bfd);
7438 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7439
7440 rel = relocs;
7441 relend = relocs + input_section->reloc_count;
7442 for (; rel < relend; rel++)
7443 {
7444 enum elf_ppc64_reloc_type r_type;
7445 bfd_vma addend;
7446 bfd_reloc_status_type r;
7447 Elf_Internal_Sym *sym;
7448 asection *sec;
7449 struct elf_link_hash_entry *h;
7450 struct elf_link_hash_entry *fdh;
7451 const char *sym_name;
7452 unsigned long r_symndx, toc_symndx;
7453 char tls_mask, tls_gd, tls_type;
7454 char sym_type;
7455 bfd_vma relocation;
7456 bfd_boolean unresolved_reloc;
7457 bfd_boolean warned;
7458 unsigned long insn, mask;
7459 struct ppc_stub_hash_entry *stub_entry;
7460 bfd_vma max_br_offset;
7461 bfd_vma from;
7462
7463 r_type = ELF64_R_TYPE (rel->r_info);
7464 r_symndx = ELF64_R_SYM (rel->r_info);
7465
7466 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7467 symbol of the previous ADDR64 reloc. The symbol gives us the
7468 proper TOC base to use. */
7469 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7470 && rel != relocs
7471 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7472 && is_opd)
7473 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7474
7475 sym = NULL;
7476 sec = NULL;
7477 h = NULL;
7478 sym_name = NULL;
7479 unresolved_reloc = FALSE;
7480 warned = FALSE;
7481
7482 if (r_symndx < symtab_hdr->sh_info)
7483 {
7484 /* It's a local symbol. */
7485 sym = local_syms + r_symndx;
7486 sec = local_sections[r_symndx];
7487 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7488 sym_type = ELF64_ST_TYPE (sym->st_info);
7489 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7490 if (elf_section_data (sec) != NULL)
7491 {
7492 long *opd_sym_adjust;
7493
7494 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7495 if (opd_sym_adjust != NULL)
7496 relocation += opd_sym_adjust[sym->st_value / 24];
7497 }
7498 }
7499 else
7500 {
7501 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7502 r_symndx, symtab_hdr, sym_hashes,
7503 h, sec, relocation,
7504 unresolved_reloc, warned);
7505 sym_name = h->root.root.string;
7506 sym_type = h->type;
7507 }
7508
7509 /* TLS optimizations. Replace instruction sequences and relocs
7510 based on information we collected in tls_optimize. We edit
7511 RELOCS so that --emit-relocs will output something sensible
7512 for the final instruction stream. */
7513 tls_mask = 0;
7514 tls_gd = 0;
7515 toc_symndx = 0;
7516 if (IS_PPC64_TLS_RELOC (r_type))
7517 {
7518 if (h != NULL)
7519 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7520 else if (local_got_ents != NULL)
7521 {
7522 char *lgot_masks;
7523 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7524 tls_mask = lgot_masks[r_symndx];
7525 }
7526 if (tls_mask == 0 && r_type == R_PPC64_TLS)
7527 {
7528 /* Check for toc tls entries. */
7529 char *toc_tls;
7530
7531 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7532 rel, input_bfd))
7533 return FALSE;
7534
7535 if (toc_tls)
7536 tls_mask = *toc_tls;
7537 }
7538 }
7539
7540 /* Check that tls relocs are used with tls syms, and non-tls
7541 relocs are used with non-tls syms. */
7542 if (r_symndx != 0
7543 && r_type != R_PPC64_NONE
7544 && (h == NULL
7545 || h->root.type == bfd_link_hash_defined
7546 || h->root.type == bfd_link_hash_defweak)
7547 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7548 {
7549 if (r_type == R_PPC64_TLS && tls_mask != 0)
7550 /* R_PPC64_TLS is OK against a symbol in the TOC. */
7551 ;
7552 else
7553 (*_bfd_error_handler)
7554 (sym_type == STT_TLS
7555 ? _("%s(%s+0x%lx): %s used with TLS symbol %s")
7556 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"),
7557 bfd_archive_filename (input_bfd),
7558 input_section->name,
7559 (long) rel->r_offset,
7560 ppc64_elf_howto_table[r_type]->name,
7561 sym_name);
7562 }
7563
7564 /* Ensure reloc mapping code below stays sane. */
7565 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7566 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7567 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7568 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7569 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7570 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7571 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7572 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7573 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7574 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7575 abort ();
7576
7577 switch (r_type)
7578 {
7579 default:
7580 break;
7581
7582 case R_PPC64_TOC16:
7583 case R_PPC64_TOC16_LO:
7584 case R_PPC64_TOC16_DS:
7585 case R_PPC64_TOC16_LO_DS:
7586 {
7587 /* Check for toc tls entries. */
7588 char *toc_tls;
7589 int retval;
7590
7591 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7592 rel, input_bfd);
7593 if (retval == 0)
7594 return FALSE;
7595
7596 if (toc_tls)
7597 {
7598 tls_mask = *toc_tls;
7599 if (r_type == R_PPC64_TOC16_DS
7600 || r_type == R_PPC64_TOC16_LO_DS)
7601 {
7602 if (tls_mask != 0
7603 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7604 goto toctprel;
7605 }
7606 else
7607 {
7608 /* If we found a GD reloc pair, then we might be
7609 doing a GD->IE transition. */
7610 if (retval == 2)
7611 {
7612 tls_gd = TLS_TPRELGD;
7613 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7614 goto tls_get_addr_check;
7615 }
7616 else if (retval == 3)
7617 {
7618 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7619 goto tls_get_addr_check;
7620 }
7621 }
7622 }
7623 }
7624 break;
7625
7626 case R_PPC64_GOT_TPREL16_DS:
7627 case R_PPC64_GOT_TPREL16_LO_DS:
7628 if (tls_mask != 0
7629 && (tls_mask & TLS_TPREL) == 0)
7630 {
7631 toctprel:
7632 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7633 insn &= 31 << 21;
7634 insn |= 0x3c0d0000; /* addis 0,13,0 */
7635 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7636 r_type = R_PPC64_TPREL16_HA;
7637 if (toc_symndx != 0)
7638 {
7639 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7640 /* We changed the symbol. Start over in order to
7641 get h, sym, sec etc. right. */
7642 rel--;
7643 continue;
7644 }
7645 else
7646 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7647 }
7648 break;
7649
7650 case R_PPC64_TLS:
7651 if (tls_mask != 0
7652 && (tls_mask & TLS_TPREL) == 0)
7653 {
7654 bfd_vma rtra;
7655 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7656 if ((insn & ((0x3f << 26) | (31 << 11)))
7657 == ((31 << 26) | (13 << 11)))
7658 rtra = insn & ((1 << 26) - (1 << 16));
7659 else if ((insn & ((0x3f << 26) | (31 << 16)))
7660 == ((31 << 26) | (13 << 16)))
7661 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7662 else
7663 abort ();
7664 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7665 /* add -> addi. */
7666 insn = 14 << 26;
7667 else if ((insn & (31 << 1)) == 23 << 1
7668 && ((insn & (31 << 6)) < 14 << 6
7669 || ((insn & (31 << 6)) >= 16 << 6
7670 && (insn & (31 << 6)) < 24 << 6)))
7671 /* load and store indexed -> dform. */
7672 insn = (32 | ((insn >> 6) & 31)) << 26;
7673 else if ((insn & (31 << 1)) == 21 << 1
7674 && (insn & (0x1a << 6)) == 0)
7675 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7676 insn = (((58 | ((insn >> 6) & 4)) << 26)
7677 | ((insn >> 6) & 1));
7678 else if ((insn & (31 << 1)) == 21 << 1
7679 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7680 /* lwax -> lwa. */
7681 insn = (58 << 26) | 2;
7682 else
7683 abort ();
7684 insn |= rtra;
7685 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7686 /* Was PPC64_TLS which sits on insn boundary, now
7687 PPC64_TPREL16_LO which is at insn+2. */
7688 rel->r_offset += 2;
7689 r_type = R_PPC64_TPREL16_LO;
7690 if (toc_symndx != 0)
7691 {
7692 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7693 /* We changed the symbol. Start over in order to
7694 get h, sym, sec etc. right. */
7695 rel--;
7696 continue;
7697 }
7698 else
7699 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7700 }
7701 break;
7702
7703 case R_PPC64_GOT_TLSGD16_HI:
7704 case R_PPC64_GOT_TLSGD16_HA:
7705 tls_gd = TLS_TPRELGD;
7706 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7707 goto tls_gdld_hi;
7708 break;
7709
7710 case R_PPC64_GOT_TLSLD16_HI:
7711 case R_PPC64_GOT_TLSLD16_HA:
7712 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7713 {
7714 tls_gdld_hi:
7715 if ((tls_mask & tls_gd) != 0)
7716 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7717 + R_PPC64_GOT_TPREL16_DS);
7718 else
7719 {
7720 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7721 rel->r_offset -= 2;
7722 r_type = R_PPC64_NONE;
7723 }
7724 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7725 }
7726 break;
7727
7728 case R_PPC64_GOT_TLSGD16:
7729 case R_PPC64_GOT_TLSGD16_LO:
7730 tls_gd = TLS_TPRELGD;
7731 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7732 goto tls_get_addr_check;
7733 break;
7734
7735 case R_PPC64_GOT_TLSLD16:
7736 case R_PPC64_GOT_TLSLD16_LO:
7737 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7738 {
7739 tls_get_addr_check:
7740 if (rel + 1 < relend)
7741 {
7742 enum elf_ppc64_reloc_type r_type2;
7743 unsigned long r_symndx2;
7744 struct elf_link_hash_entry *h2;
7745 bfd_vma insn1, insn2, insn3;
7746 bfd_vma offset;
7747
7748 /* The next instruction should be a call to
7749 __tls_get_addr. Peek at the reloc to be sure. */
7750 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7751 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7752 if (r_symndx2 < symtab_hdr->sh_info
7753 || (r_type2 != R_PPC64_REL14
7754 && r_type2 != R_PPC64_REL14_BRTAKEN
7755 && r_type2 != R_PPC64_REL14_BRNTAKEN
7756 && r_type2 != R_PPC64_REL24))
7757 break;
7758
7759 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7760 while (h2->root.type == bfd_link_hash_indirect
7761 || h2->root.type == bfd_link_hash_warning)
7762 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7763 if (h2 == NULL || h2 != htab->tls_get_addr)
7764 break;
7765
7766 /* OK, it checks out. Replace the call. */
7767 offset = rel[1].r_offset;
7768 insn1 = bfd_get_32 (output_bfd,
7769 contents + rel->r_offset - 2);
7770 insn3 = bfd_get_32 (output_bfd,
7771 contents + offset + 4);
7772 if ((tls_mask & tls_gd) != 0)
7773 {
7774 /* IE */
7775 insn1 &= (1 << 26) - (1 << 2);
7776 insn1 |= 58 << 26; /* ld */
7777 insn2 = 0x7c636a14; /* add 3,3,13 */
7778 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7779 if ((tls_mask & TLS_EXPLICIT) == 0)
7780 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7781 + R_PPC64_GOT_TPREL16_DS);
7782 else
7783 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7784 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7785 }
7786 else
7787 {
7788 /* LE */
7789 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7790 insn2 = 0x38630000; /* addi 3,3,0 */
7791 if (tls_gd == 0)
7792 {
7793 /* Was an LD reloc. */
7794 r_symndx = 0;
7795 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7796 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7797 }
7798 else if (toc_symndx != 0)
7799 r_symndx = toc_symndx;
7800 r_type = R_PPC64_TPREL16_HA;
7801 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7802 rel[1].r_info = ELF64_R_INFO (r_symndx,
7803 R_PPC64_TPREL16_LO);
7804 rel[1].r_offset += 2;
7805 }
7806 if (insn3 == NOP
7807 || insn3 == CROR_151515 || insn3 == CROR_313131)
7808 {
7809 insn3 = insn2;
7810 insn2 = NOP;
7811 rel[1].r_offset += 4;
7812 }
7813 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7814 bfd_put_32 (output_bfd, insn2, contents + offset);
7815 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7816 if (tls_gd == 0 || toc_symndx != 0)
7817 {
7818 /* We changed the symbol. Start over in order
7819 to get h, sym, sec etc. right. */
7820 rel--;
7821 continue;
7822 }
7823 }
7824 }
7825 break;
7826
7827 case R_PPC64_DTPMOD64:
7828 if (rel + 1 < relend
7829 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7830 && rel[1].r_offset == rel->r_offset + 8)
7831 {
7832 if ((tls_mask & TLS_GD) == 0)
7833 {
7834 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7835 if ((tls_mask & TLS_TPRELGD) != 0)
7836 r_type = R_PPC64_TPREL64;
7837 else
7838 {
7839 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7840 r_type = R_PPC64_NONE;
7841 }
7842 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7843 }
7844 }
7845 else
7846 {
7847 if ((tls_mask & TLS_LD) == 0)
7848 {
7849 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7850 r_type = R_PPC64_NONE;
7851 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7852 }
7853 }
7854 break;
7855
7856 case R_PPC64_TPREL64:
7857 if ((tls_mask & TLS_TPREL) == 0)
7858 {
7859 r_type = R_PPC64_NONE;
7860 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7861 }
7862 break;
7863 }
7864
7865 /* Handle other relocations that tweak non-addend part of insn. */
7866 insn = 0;
7867 switch (r_type)
7868 {
7869 default:
7870 break;
7871
7872 /* Branch taken prediction relocations. */
7873 case R_PPC64_ADDR14_BRTAKEN:
7874 case R_PPC64_REL14_BRTAKEN:
7875 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7876 /* Fall thru. */
7877
7878 /* Branch not taken prediction relocations. */
7879 case R_PPC64_ADDR14_BRNTAKEN:
7880 case R_PPC64_REL14_BRNTAKEN:
7881 insn |= bfd_get_32 (output_bfd,
7882 contents + rel->r_offset) & ~(0x01 << 21);
7883 if (is_power4)
7884 {
7885 /* Set 'a' bit. This is 0b00010 in BO field for branch
7886 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7887 for branch on CTR insns (BO == 1a00t or 1a01t). */
7888 if ((insn & (0x14 << 21)) == (0x04 << 21))
7889 insn |= 0x02 << 21;
7890 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7891 insn |= 0x08 << 21;
7892 else
7893 break;
7894 }
7895 else
7896 {
7897 from = (rel->r_offset
7898 + input_section->output_offset
7899 + input_section->output_section->vma);
7900
7901 /* Invert 'y' bit if not the default. */
7902 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7903 insn ^= 0x01 << 21;
7904 }
7905
7906 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7907 break;
7908
7909 case R_PPC64_REL24:
7910 /* Calls to functions with a different TOC, such as calls to
7911 shared objects, need to alter the TOC pointer. This is
7912 done using a linkage stub. A REL24 branching to these
7913 linkage stubs needs to be followed by a nop, as the nop
7914 will be replaced with an instruction to restore the TOC
7915 base pointer. */
7916 if (((h != NULL
7917 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7918 && fdh->plt.plist != NULL)
7919 || ((fdh = h, sec) != NULL
7920 && sec->output_section != NULL
7921 && (htab->stub_group[sec->id].toc_off
7922 != htab->stub_group[input_section->id].toc_off)))
7923 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7924 rel, htab)) != NULL
7925 && (stub_entry->stub_type == ppc_stub_plt_call
7926 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7927 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7928 {
7929 bfd_boolean can_plt_call = 0;
7930
7931 if (rel->r_offset + 8 <= input_section->_cooked_size)
7932 {
7933 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7934 if (insn == NOP
7935 || insn == CROR_151515 || insn == CROR_313131)
7936 {
7937 bfd_put_32 (input_bfd, LD_R2_40R1,
7938 contents + rel->r_offset + 4);
7939 can_plt_call = 1;
7940 }
7941 }
7942
7943 if (!can_plt_call)
7944 {
7945 if (stub_entry->stub_type == ppc_stub_plt_call)
7946 {
7947 /* If this is a plain branch rather than a branch
7948 and link, don't require a nop. */
7949 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7950 if ((insn & 1) == 0)
7951 can_plt_call = 1;
7952 }
7953 else if (h != NULL
7954 && strcmp (h->root.root.string,
7955 ".__libc_start_main") == 0)
7956 {
7957 /* Allow crt1 branch to go via a toc adjusting stub. */
7958 can_plt_call = 1;
7959 }
7960 else
7961 {
7962 if (strcmp (input_section->output_section->name,
7963 ".init") == 0
7964 || strcmp (input_section->output_section->name,
7965 ".fini") == 0)
7966 (*_bfd_error_handler)
7967 (_("%s(%s+0x%lx): automatic multiple TOCs "
7968 "not supported using your crt files; "
7969 "recompile with -mminimal-toc or upgrade gcc"),
7970 bfd_archive_filename (input_bfd),
7971 input_section->name,
7972 (long) rel->r_offset);
7973 else
7974 (*_bfd_error_handler)
7975 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7976 "does not allow automatic multiple TOCs; "
7977 "recompile with -mminimal-toc or "
7978 "-fno-optimize-sibling-calls, "
7979 "or make `%s' extern"),
7980 bfd_archive_filename (input_bfd),
7981 input_section->name,
7982 (long) rel->r_offset,
7983 sym_name,
7984 sym_name);
7985 bfd_set_error (bfd_error_bad_value);
7986 ret = FALSE;
7987 }
7988 }
7989
7990 if (can_plt_call)
7991 {
7992 relocation = (stub_entry->stub_offset
7993 + stub_entry->stub_sec->output_offset
7994 + stub_entry->stub_sec->output_section->vma);
7995 if (stub_entry->stub_type == ppc_stub_plt_call)
7996 unresolved_reloc = FALSE;
7997 }
7998 }
7999
8000 if (h != NULL
8001 && h->root.type == bfd_link_hash_undefweak
8002 && relocation == 0
8003 && rel->r_addend == 0)
8004 {
8005 /* Tweak calls to undefined weak functions to point at a
8006 blr. We can thus call a weak function without first
8007 checking whether the function is defined. We have a
8008 blr at the end of .sfpr. */
8009 BFD_ASSERT (htab->sfpr->_raw_size != 0);
8010 relocation = (htab->sfpr->_raw_size - 4
8011 + htab->sfpr->output_offset
8012 + htab->sfpr->output_section->vma);
8013 from = (rel->r_offset
8014 + input_section->output_offset
8015 + input_section->output_section->vma);
8016
8017 /* But let's not be silly about it. If the blr isn't in
8018 reach, just go to the next instruction. */
8019 if (relocation - from + (1 << 25) >= (1 << 26)
8020 || htab->sfpr->_raw_size == 0)
8021 relocation = from + 4;
8022 }
8023 break;
8024 }
8025
8026 /* Set `addend'. */
8027 tls_type = 0;
8028 addend = rel->r_addend;
8029 switch (r_type)
8030 {
8031 default:
8032 (*_bfd_error_handler)
8033 (_("%s: unknown relocation type %d for symbol %s"),
8034 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
8035
8036 bfd_set_error (bfd_error_bad_value);
8037 ret = FALSE;
8038 continue;
8039
8040 case R_PPC64_NONE:
8041 case R_PPC64_TLS:
8042 case R_PPC64_GNU_VTINHERIT:
8043 case R_PPC64_GNU_VTENTRY:
8044 continue;
8045
8046 /* GOT16 relocations. Like an ADDR16 using the symbol's
8047 address in the GOT as relocation value instead of the
8048 symbol's value itself. Also, create a GOT entry for the
8049 symbol and put the symbol value there. */
8050 case R_PPC64_GOT_TLSGD16:
8051 case R_PPC64_GOT_TLSGD16_LO:
8052 case R_PPC64_GOT_TLSGD16_HI:
8053 case R_PPC64_GOT_TLSGD16_HA:
8054 tls_type = TLS_TLS | TLS_GD;
8055 goto dogot;
8056
8057 case R_PPC64_GOT_TLSLD16:
8058 case R_PPC64_GOT_TLSLD16_LO:
8059 case R_PPC64_GOT_TLSLD16_HI:
8060 case R_PPC64_GOT_TLSLD16_HA:
8061 tls_type = TLS_TLS | TLS_LD;
8062 goto dogot;
8063
8064 case R_PPC64_GOT_TPREL16_DS:
8065 case R_PPC64_GOT_TPREL16_LO_DS:
8066 case R_PPC64_GOT_TPREL16_HI:
8067 case R_PPC64_GOT_TPREL16_HA:
8068 tls_type = TLS_TLS | TLS_TPREL;
8069 goto dogot;
8070
8071 case R_PPC64_GOT_DTPREL16_DS:
8072 case R_PPC64_GOT_DTPREL16_LO_DS:
8073 case R_PPC64_GOT_DTPREL16_HI:
8074 case R_PPC64_GOT_DTPREL16_HA:
8075 tls_type = TLS_TLS | TLS_DTPREL;
8076 goto dogot;
8077
8078 case R_PPC64_GOT16:
8079 case R_PPC64_GOT16_LO:
8080 case R_PPC64_GOT16_HI:
8081 case R_PPC64_GOT16_HA:
8082 case R_PPC64_GOT16_DS:
8083 case R_PPC64_GOT16_LO_DS:
8084 dogot:
8085 {
8086 /* Relocation is to the entry for this symbol in the global
8087 offset table. */
8088 asection *got;
8089 bfd_vma *offp;
8090 bfd_vma off;
8091 unsigned long indx = 0;
8092
8093 if (tls_type == (TLS_TLS | TLS_LD)
8094 && (h == NULL
8095 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
8096 offp = &ppc64_tlsld_got (input_bfd)->offset;
8097 else
8098 {
8099 struct got_entry *ent;
8100
8101 if (h != NULL)
8102 {
8103 bfd_boolean dyn = htab->elf.dynamic_sections_created;
8104 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8105 || (info->shared
8106 && SYMBOL_REFERENCES_LOCAL (info, h)))
8107 /* This is actually a static link, or it is a
8108 -Bsymbolic link and the symbol is defined
8109 locally, or the symbol was forced to be local
8110 because of a version file. */
8111 ;
8112 else
8113 {
8114 indx = h->dynindx;
8115 unresolved_reloc = FALSE;
8116 }
8117 ent = h->got.glist;
8118 }
8119 else
8120 {
8121 if (local_got_ents == NULL)
8122 abort ();
8123 ent = local_got_ents[r_symndx];
8124 }
8125
8126 for (; ent != NULL; ent = ent->next)
8127 if (ent->addend == rel->r_addend
8128 && ent->owner == input_bfd
8129 && ent->tls_type == tls_type)
8130 break;
8131 if (ent == NULL)
8132 abort ();
8133 offp = &ent->got.offset;
8134 }
8135
8136 got = ppc64_elf_tdata (input_bfd)->got;
8137 if (got == NULL)
8138 abort ();
8139
8140 /* The offset must always be a multiple of 8. We use the
8141 least significant bit to record whether we have already
8142 processed this entry. */
8143 off = *offp;
8144 if ((off & 1) != 0)
8145 off &= ~1;
8146 else
8147 {
8148 /* Generate relocs for the dynamic linker, except in
8149 the case of TLSLD where we'll use one entry per
8150 module. */
8151 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
8152
8153 *offp = off | 1;
8154 if ((info->shared || indx != 0)
8155 && (h == NULL
8156 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8157 || h->root.type != bfd_link_hash_undefweak))
8158 {
8159 outrel.r_offset = (got->output_section->vma
8160 + got->output_offset
8161 + off);
8162 outrel.r_addend = rel->r_addend;
8163 if (tls_type & (TLS_LD | TLS_GD))
8164 {
8165 outrel.r_addend = 0;
8166 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8167 if (tls_type == (TLS_TLS | TLS_GD))
8168 {
8169 loc = relgot->contents;
8170 loc += (relgot->reloc_count++
8171 * sizeof (Elf64_External_Rela));
8172 bfd_elf64_swap_reloca_out (output_bfd,
8173 &outrel, loc);
8174 outrel.r_offset += 8;
8175 outrel.r_addend = rel->r_addend;
8176 outrel.r_info
8177 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8178 }
8179 }
8180 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8181 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8182 else if (tls_type == (TLS_TLS | TLS_TPREL))
8183 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8184 else if (indx == 0)
8185 {
8186 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8187
8188 /* Write the .got section contents for the sake
8189 of prelink. */
8190 loc = got->contents + off;
8191 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8192 loc);
8193 }
8194 else
8195 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8196
8197 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8198 {
8199 outrel.r_addend += relocation;
8200 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8201 outrel.r_addend -= htab->elf.tls_sec->vma;
8202 }
8203 loc = relgot->contents;
8204 loc += (relgot->reloc_count++
8205 * sizeof (Elf64_External_Rela));
8206 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8207 }
8208
8209 /* Init the .got section contents here if we're not
8210 emitting a reloc. */
8211 else
8212 {
8213 relocation += rel->r_addend;
8214 if (tls_type == (TLS_TLS | TLS_LD))
8215 relocation = 1;
8216 else if (tls_type != 0)
8217 {
8218 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
8219 if (tls_type == (TLS_TLS | TLS_TPREL))
8220 relocation += DTP_OFFSET - TP_OFFSET;
8221
8222 if (tls_type == (TLS_TLS | TLS_GD))
8223 {
8224 bfd_put_64 (output_bfd, relocation,
8225 got->contents + off + 8);
8226 relocation = 1;
8227 }
8228 }
8229
8230 bfd_put_64 (output_bfd, relocation,
8231 got->contents + off);
8232 }
8233 }
8234
8235 if (off >= (bfd_vma) -2)
8236 abort ();
8237
8238 relocation = got->output_offset + off;
8239
8240 /* TOC base (r2) is TOC start plus 0x8000. */
8241 addend = -TOC_BASE_OFF;
8242 }
8243 break;
8244
8245 case R_PPC64_PLT16_HA:
8246 case R_PPC64_PLT16_HI:
8247 case R_PPC64_PLT16_LO:
8248 case R_PPC64_PLT32:
8249 case R_PPC64_PLT64:
8250 /* Relocation is to the entry for this symbol in the
8251 procedure linkage table. */
8252
8253 /* Resolve a PLT reloc against a local symbol directly,
8254 without using the procedure linkage table. */
8255 if (h == NULL)
8256 break;
8257
8258 /* It's possible that we didn't make a PLT entry for this
8259 symbol. This happens when statically linking PIC code,
8260 or when using -Bsymbolic. Go find a match if there is a
8261 PLT entry. */
8262 if (htab->plt != NULL)
8263 {
8264 struct plt_entry *ent;
8265 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8266 if (ent->addend == rel->r_addend
8267 && ent->plt.offset != (bfd_vma) -1)
8268 {
8269 relocation = (htab->plt->output_section->vma
8270 + htab->plt->output_offset
8271 + ent->plt.offset);
8272 unresolved_reloc = FALSE;
8273 }
8274 }
8275 break;
8276
8277 case R_PPC64_TOC:
8278 /* Relocation value is TOC base. */
8279 relocation = TOCstart;
8280 if (r_symndx == 0)
8281 relocation += htab->stub_group[input_section->id].toc_off;
8282 else if (unresolved_reloc)
8283 ;
8284 else if (sec != NULL && sec->id <= htab->top_id)
8285 relocation += htab->stub_group[sec->id].toc_off;
8286 else
8287 unresolved_reloc = TRUE;
8288 goto dodyn2;
8289
8290 /* TOC16 relocs. We want the offset relative to the TOC base,
8291 which is the address of the start of the TOC plus 0x8000.
8292 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8293 in this order. */
8294 case R_PPC64_TOC16:
8295 case R_PPC64_TOC16_LO:
8296 case R_PPC64_TOC16_HI:
8297 case R_PPC64_TOC16_DS:
8298 case R_PPC64_TOC16_LO_DS:
8299 case R_PPC64_TOC16_HA:
8300 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8301 break;
8302
8303 /* Relocate against the beginning of the section. */
8304 case R_PPC64_SECTOFF:
8305 case R_PPC64_SECTOFF_LO:
8306 case R_PPC64_SECTOFF_HI:
8307 case R_PPC64_SECTOFF_DS:
8308 case R_PPC64_SECTOFF_LO_DS:
8309 case R_PPC64_SECTOFF_HA:
8310 if (sec != NULL)
8311 addend -= sec->output_section->vma;
8312 break;
8313
8314 case R_PPC64_REL14:
8315 case R_PPC64_REL14_BRNTAKEN:
8316 case R_PPC64_REL14_BRTAKEN:
8317 case R_PPC64_REL24:
8318 break;
8319
8320 case R_PPC64_TPREL16:
8321 case R_PPC64_TPREL16_LO:
8322 case R_PPC64_TPREL16_HI:
8323 case R_PPC64_TPREL16_HA:
8324 case R_PPC64_TPREL16_DS:
8325 case R_PPC64_TPREL16_LO_DS:
8326 case R_PPC64_TPREL16_HIGHER:
8327 case R_PPC64_TPREL16_HIGHERA:
8328 case R_PPC64_TPREL16_HIGHEST:
8329 case R_PPC64_TPREL16_HIGHESTA:
8330 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8331 if (info->shared)
8332 /* The TPREL16 relocs shouldn't really be used in shared
8333 libs as they will result in DT_TEXTREL being set, but
8334 support them anyway. */
8335 goto dodyn;
8336 break;
8337
8338 case R_PPC64_DTPREL16:
8339 case R_PPC64_DTPREL16_LO:
8340 case R_PPC64_DTPREL16_HI:
8341 case R_PPC64_DTPREL16_HA:
8342 case R_PPC64_DTPREL16_DS:
8343 case R_PPC64_DTPREL16_LO_DS:
8344 case R_PPC64_DTPREL16_HIGHER:
8345 case R_PPC64_DTPREL16_HIGHERA:
8346 case R_PPC64_DTPREL16_HIGHEST:
8347 case R_PPC64_DTPREL16_HIGHESTA:
8348 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8349 break;
8350
8351 case R_PPC64_DTPMOD64:
8352 relocation = 1;
8353 addend = 0;
8354 goto dodyn;
8355
8356 case R_PPC64_TPREL64:
8357 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8358 goto dodyn;
8359
8360 case R_PPC64_DTPREL64:
8361 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8362 /* Fall thru */
8363
8364 /* Relocations that may need to be propagated if this is a
8365 dynamic object. */
8366 case R_PPC64_REL30:
8367 case R_PPC64_REL32:
8368 case R_PPC64_REL64:
8369 case R_PPC64_ADDR14:
8370 case R_PPC64_ADDR14_BRNTAKEN:
8371 case R_PPC64_ADDR14_BRTAKEN:
8372 case R_PPC64_ADDR16:
8373 case R_PPC64_ADDR16_DS:
8374 case R_PPC64_ADDR16_HA:
8375 case R_PPC64_ADDR16_HI:
8376 case R_PPC64_ADDR16_HIGHER:
8377 case R_PPC64_ADDR16_HIGHERA:
8378 case R_PPC64_ADDR16_HIGHEST:
8379 case R_PPC64_ADDR16_HIGHESTA:
8380 case R_PPC64_ADDR16_LO:
8381 case R_PPC64_ADDR16_LO_DS:
8382 case R_PPC64_ADDR24:
8383 case R_PPC64_ADDR32:
8384 case R_PPC64_ADDR64:
8385 case R_PPC64_UADDR16:
8386 case R_PPC64_UADDR32:
8387 case R_PPC64_UADDR64:
8388 /* r_symndx will be zero only for relocs against symbols
8389 from removed linkonce sections, or sections discarded by
8390 a linker script. */
8391 dodyn:
8392 if (r_symndx == 0)
8393 break;
8394 /* Fall thru. */
8395
8396 dodyn2:
8397 if ((input_section->flags & SEC_ALLOC) == 0)
8398 break;
8399
8400 if (NO_OPD_RELOCS && is_opd)
8401 break;
8402
8403 if ((info->shared
8404 && (h == NULL
8405 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8406 || h->root.type != bfd_link_hash_undefweak)
8407 && (MUST_BE_DYN_RELOC (r_type)
8408 || !SYMBOL_CALLS_LOCAL (info, h)))
8409 || (ELIMINATE_COPY_RELOCS
8410 && !info->shared
8411 && h != NULL
8412 && h->dynindx != -1
8413 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8414 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8415 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8416 {
8417 Elf_Internal_Rela outrel;
8418 bfd_boolean skip, relocate;
8419 asection *sreloc;
8420 bfd_byte *loc;
8421 bfd_vma out_off;
8422
8423 /* When generating a dynamic object, these relocations
8424 are copied into the output file to be resolved at run
8425 time. */
8426
8427 skip = FALSE;
8428 relocate = FALSE;
8429
8430 out_off = _bfd_elf_section_offset (output_bfd, info,
8431 input_section, rel->r_offset);
8432 if (out_off == (bfd_vma) -1)
8433 skip = TRUE;
8434 else if (out_off == (bfd_vma) -2)
8435 skip = TRUE, relocate = TRUE;
8436 out_off += (input_section->output_section->vma
8437 + input_section->output_offset);
8438 outrel.r_offset = out_off;
8439 outrel.r_addend = rel->r_addend;
8440
8441 /* Optimize unaligned reloc use. */
8442 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8443 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8444 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8445 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8446 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8447 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8448 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8449 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8450 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8451
8452 if (skip)
8453 memset (&outrel, 0, sizeof outrel);
8454 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8455 && !is_opd
8456 && r_type != R_PPC64_TOC)
8457 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8458 else
8459 {
8460 /* This symbol is local, or marked to become local,
8461 or this is an opd section reloc which must point
8462 at a local function. */
8463 outrel.r_addend += relocation;
8464 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8465 {
8466 if (is_opd && h != NULL)
8467 {
8468 /* Lie about opd entries. This case occurs
8469 when building shared libraries and we
8470 reference a function in another shared
8471 lib. The same thing happens for a weak
8472 definition in an application that's
8473 overridden by a strong definition in a
8474 shared lib. (I believe this is a generic
8475 bug in binutils handling of weak syms.)
8476 In these cases we won't use the opd
8477 entry in this lib. */
8478 unresolved_reloc = FALSE;
8479 }
8480 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8481
8482 /* We need to relocate .opd contents for ld.so.
8483 Prelink also wants simple and consistent rules
8484 for relocs. This make all RELATIVE relocs have
8485 *r_offset equal to r_addend. */
8486 relocate = TRUE;
8487 }
8488 else
8489 {
8490 long indx = 0;
8491
8492 if (bfd_is_abs_section (sec))
8493 ;
8494 else if (sec == NULL || sec->owner == NULL)
8495 {
8496 bfd_set_error (bfd_error_bad_value);
8497 return FALSE;
8498 }
8499 else
8500 {
8501 asection *osec;
8502
8503 osec = sec->output_section;
8504 indx = elf_section_data (osec)->dynindx;
8505
8506 /* We are turning this relocation into one
8507 against a section symbol, so subtract out
8508 the output section's address but not the
8509 offset of the input section in the output
8510 section. */
8511 outrel.r_addend -= osec->vma;
8512 }
8513
8514 outrel.r_info = ELF64_R_INFO (indx, r_type);
8515 }
8516 }
8517
8518 sreloc = elf_section_data (input_section)->sreloc;
8519 if (sreloc == NULL)
8520 abort ();
8521
8522 loc = sreloc->contents;
8523 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8524 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8525
8526 /* If this reloc is against an external symbol, it will
8527 be computed at runtime, so there's no need to do
8528 anything now. However, for the sake of prelink ensure
8529 that the section contents are a known value. */
8530 if (! relocate)
8531 {
8532 unresolved_reloc = FALSE;
8533 /* The value chosen here is quite arbitrary as ld.so
8534 ignores section contents except for the special
8535 case of .opd where the contents might be accessed
8536 before relocation. Choose zero, as that won't
8537 cause reloc overflow. */
8538 relocation = 0;
8539 addend = 0;
8540 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8541 to improve backward compatibility with older
8542 versions of ld. */
8543 if (r_type == R_PPC64_ADDR64)
8544 addend = outrel.r_addend;
8545 /* Adjust pc_relative relocs to have zero in *r_offset. */
8546 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8547 addend = (input_section->output_section->vma
8548 + input_section->output_offset
8549 + rel->r_offset);
8550 }
8551 }
8552 break;
8553
8554 case R_PPC64_COPY:
8555 case R_PPC64_GLOB_DAT:
8556 case R_PPC64_JMP_SLOT:
8557 case R_PPC64_RELATIVE:
8558 /* We shouldn't ever see these dynamic relocs in relocatable
8559 files. */
8560 /* Fall through. */
8561
8562 case R_PPC64_PLTGOT16:
8563 case R_PPC64_PLTGOT16_DS:
8564 case R_PPC64_PLTGOT16_HA:
8565 case R_PPC64_PLTGOT16_HI:
8566 case R_PPC64_PLTGOT16_LO:
8567 case R_PPC64_PLTGOT16_LO_DS:
8568 case R_PPC64_PLTREL32:
8569 case R_PPC64_PLTREL64:
8570 /* These ones haven't been implemented yet. */
8571
8572 (*_bfd_error_handler)
8573 (_("%s: relocation %s is not supported for symbol %s."),
8574 bfd_archive_filename (input_bfd),
8575 ppc64_elf_howto_table[r_type]->name, sym_name);
8576
8577 bfd_set_error (bfd_error_invalid_operation);
8578 ret = FALSE;
8579 continue;
8580 }
8581
8582 /* Do any further special processing. */
8583 switch (r_type)
8584 {
8585 default:
8586 break;
8587
8588 case R_PPC64_ADDR16_HA:
8589 case R_PPC64_ADDR16_HIGHERA:
8590 case R_PPC64_ADDR16_HIGHESTA:
8591 case R_PPC64_GOT16_HA:
8592 case R_PPC64_PLTGOT16_HA:
8593 case R_PPC64_PLT16_HA:
8594 case R_PPC64_TOC16_HA:
8595 case R_PPC64_SECTOFF_HA:
8596 case R_PPC64_TPREL16_HA:
8597 case R_PPC64_DTPREL16_HA:
8598 case R_PPC64_GOT_TLSGD16_HA:
8599 case R_PPC64_GOT_TLSLD16_HA:
8600 case R_PPC64_GOT_TPREL16_HA:
8601 case R_PPC64_GOT_DTPREL16_HA:
8602 case R_PPC64_TPREL16_HIGHER:
8603 case R_PPC64_TPREL16_HIGHERA:
8604 case R_PPC64_TPREL16_HIGHEST:
8605 case R_PPC64_TPREL16_HIGHESTA:
8606 case R_PPC64_DTPREL16_HIGHER:
8607 case R_PPC64_DTPREL16_HIGHERA:
8608 case R_PPC64_DTPREL16_HIGHEST:
8609 case R_PPC64_DTPREL16_HIGHESTA:
8610 /* It's just possible that this symbol is a weak symbol
8611 that's not actually defined anywhere. In that case,
8612 'sec' would be NULL, and we should leave the symbol
8613 alone (it will be set to zero elsewhere in the link). */
8614 if (sec != NULL)
8615 /* Add 0x10000 if sign bit in 0:15 is set.
8616 Bits 0:15 are not used. */
8617 addend += 0x8000;
8618 break;
8619
8620 case R_PPC64_ADDR16_DS:
8621 case R_PPC64_ADDR16_LO_DS:
8622 case R_PPC64_GOT16_DS:
8623 case R_PPC64_GOT16_LO_DS:
8624 case R_PPC64_PLT16_LO_DS:
8625 case R_PPC64_SECTOFF_DS:
8626 case R_PPC64_SECTOFF_LO_DS:
8627 case R_PPC64_TOC16_DS:
8628 case R_PPC64_TOC16_LO_DS:
8629 case R_PPC64_PLTGOT16_DS:
8630 case R_PPC64_PLTGOT16_LO_DS:
8631 case R_PPC64_GOT_TPREL16_DS:
8632 case R_PPC64_GOT_TPREL16_LO_DS:
8633 case R_PPC64_GOT_DTPREL16_DS:
8634 case R_PPC64_GOT_DTPREL16_LO_DS:
8635 case R_PPC64_TPREL16_DS:
8636 case R_PPC64_TPREL16_LO_DS:
8637 case R_PPC64_DTPREL16_DS:
8638 case R_PPC64_DTPREL16_LO_DS:
8639 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8640 mask = 3;
8641 /* If this reloc is against an lq insn, then the value must be
8642 a multiple of 16. This is somewhat of a hack, but the
8643 "correct" way to do this by defining _DQ forms of all the
8644 _DS relocs bloats all reloc switches in this file. It
8645 doesn't seem to make much sense to use any of these relocs
8646 in data, so testing the insn should be safe. */
8647 if ((insn & (0x3f << 26)) == (56u << 26))
8648 mask = 15;
8649 if (((relocation + addend) & mask) != 0)
8650 {
8651 (*_bfd_error_handler)
8652 (_("%s: error: relocation %s not a multiple of %d"),
8653 bfd_archive_filename (input_bfd),
8654 ppc64_elf_howto_table[r_type]->name,
8655 mask + 1);
8656 bfd_set_error (bfd_error_bad_value);
8657 ret = FALSE;
8658 continue;
8659 }
8660 break;
8661
8662 case R_PPC64_REL14:
8663 case R_PPC64_REL14_BRNTAKEN:
8664 case R_PPC64_REL14_BRTAKEN:
8665 max_br_offset = 1 << 15;
8666 goto branch_check;
8667
8668 case R_PPC64_REL24:
8669 max_br_offset = 1 << 25;
8670
8671 branch_check:
8672 /* If the branch is out of reach or the TOC register needs
8673 adjusting, then redirect the call to the local stub for
8674 this function. */
8675 from = (rel->r_offset
8676 + input_section->output_offset
8677 + input_section->output_section->vma);
8678 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8679 || (sec != NULL
8680 && sec->output_section != NULL
8681 && sec->id <= htab->top_id
8682 && (htab->stub_group[sec->id].toc_off
8683 != htab->stub_group[input_section->id].toc_off)))
8684 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8685 rel, htab)) != NULL)
8686 {
8687 /* Munge up the value and addend so that we call the stub
8688 rather than the procedure directly. */
8689 relocation = (stub_entry->stub_offset
8690 + stub_entry->stub_sec->output_offset
8691 + stub_entry->stub_sec->output_section->vma);
8692 addend = 0;
8693 }
8694 break;
8695 }
8696
8697 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8698 because such sections are not SEC_ALLOC and thus ld.so will
8699 not process them. */
8700 if (unresolved_reloc
8701 && !((input_section->flags & SEC_DEBUGGING) != 0
8702 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8703 {
8704 (*_bfd_error_handler)
8705 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8706 bfd_archive_filename (input_bfd),
8707 bfd_get_section_name (input_bfd, input_section),
8708 (long) rel->r_offset,
8709 ppc64_elf_howto_table[(int) r_type]->name,
8710 h->root.root.string);
8711 ret = FALSE;
8712 }
8713
8714 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8715 input_bfd,
8716 input_section,
8717 contents,
8718 rel->r_offset,
8719 relocation,
8720 addend);
8721
8722 if (r != bfd_reloc_ok)
8723 {
8724 if (sym_name == NULL)
8725 sym_name = "(null)";
8726 if (r == bfd_reloc_overflow)
8727 {
8728 if (warned)
8729 continue;
8730 if (h != NULL
8731 && h->root.type == bfd_link_hash_undefweak
8732 && ppc64_elf_howto_table[r_type]->pc_relative)
8733 {
8734 /* Assume this is a call protected by other code that
8735 detects the symbol is undefined. If this is the case,
8736 we can safely ignore the overflow. If not, the
8737 program is hosed anyway, and a little warning isn't
8738 going to help. */
8739
8740 continue;
8741 }
8742
8743 if (!((*info->callbacks->reloc_overflow)
8744 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8745 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8746 return FALSE;
8747 }
8748 else
8749 {
8750 (*_bfd_error_handler)
8751 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8752 bfd_archive_filename (input_bfd),
8753 bfd_get_section_name (input_bfd, input_section),
8754 (long) rel->r_offset,
8755 ppc64_elf_howto_table[r_type]->name,
8756 sym_name,
8757 (int) r);
8758 ret = FALSE;
8759 }
8760 }
8761 }
8762
8763 return ret;
8764 }
8765
8766 /* Adjust the value of any local symbols in opd sections. */
8767
8768 static bfd_boolean
8769 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
8770 const char *name ATTRIBUTE_UNUSED,
8771 Elf_Internal_Sym *elfsym,
8772 asection *input_sec,
8773 struct elf_link_hash_entry *h)
8774 {
8775 long *adjust;
8776 bfd_vma value;
8777
8778 if (h != NULL
8779 || input_sec == NULL
8780 || ppc64_elf_section_data (input_sec) == NULL
8781 || (adjust = ppc64_elf_section_data (input_sec)->opd.adjust) == NULL)
8782 return TRUE;
8783
8784 value = elfsym->st_value - input_sec->output_offset;
8785 if (!info->relocatable)
8786 value -= input_sec->output_section->vma;
8787
8788 elfsym->st_value += adjust[value / 24];
8789 return TRUE;
8790 }
8791
8792 /* Finish up dynamic symbol handling. We set the contents of various
8793 dynamic sections here. */
8794
8795 static bfd_boolean
8796 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8797 struct bfd_link_info *info,
8798 struct elf_link_hash_entry *h,
8799 Elf_Internal_Sym *sym)
8800 {
8801 struct ppc_link_hash_table *htab;
8802 bfd *dynobj;
8803
8804 htab = ppc_hash_table (info);
8805 dynobj = htab->elf.dynobj;
8806
8807 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8808 {
8809 struct plt_entry *ent;
8810 Elf_Internal_Rela rela;
8811 bfd_byte *loc;
8812
8813 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8814 if (ent->plt.offset != (bfd_vma) -1)
8815 {
8816 /* This symbol has an entry in the procedure linkage
8817 table. Set it up. */
8818
8819 if (htab->plt == NULL
8820 || htab->relplt == NULL
8821 || htab->glink == NULL)
8822 abort ();
8823
8824 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8825 fill in the PLT entry. */
8826 rela.r_offset = (htab->plt->output_section->vma
8827 + htab->plt->output_offset
8828 + ent->plt.offset);
8829 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8830 rela.r_addend = ent->addend;
8831
8832 loc = htab->relplt->contents;
8833 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8834 * sizeof (Elf64_External_Rela));
8835 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8836 }
8837 }
8838
8839 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8840 {
8841 Elf_Internal_Rela rela;
8842 bfd_byte *loc;
8843
8844 /* This symbol needs a copy reloc. Set it up. */
8845
8846 if (h->dynindx == -1
8847 || (h->root.type != bfd_link_hash_defined
8848 && h->root.type != bfd_link_hash_defweak)
8849 || htab->relbss == NULL)
8850 abort ();
8851
8852 rela.r_offset = (h->root.u.def.value
8853 + h->root.u.def.section->output_section->vma
8854 + h->root.u.def.section->output_offset);
8855 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8856 rela.r_addend = 0;
8857 loc = htab->relbss->contents;
8858 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8859 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8860 }
8861
8862 /* Mark some specially defined symbols as absolute. */
8863 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8864 sym->st_shndx = SHN_ABS;
8865
8866 return TRUE;
8867 }
8868
8869 /* Used to decide how to sort relocs in an optimal manner for the
8870 dynamic linker, before writing them out. */
8871
8872 static enum elf_reloc_type_class
8873 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8874 {
8875 enum elf_ppc64_reloc_type r_type;
8876
8877 r_type = ELF64_R_TYPE (rela->r_info);
8878 switch (r_type)
8879 {
8880 case R_PPC64_RELATIVE:
8881 return reloc_class_relative;
8882 case R_PPC64_JMP_SLOT:
8883 return reloc_class_plt;
8884 case R_PPC64_COPY:
8885 return reloc_class_copy;
8886 default:
8887 return reloc_class_normal;
8888 }
8889 }
8890
8891 /* Finish up the dynamic sections. */
8892
8893 static bfd_boolean
8894 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8895 struct bfd_link_info *info)
8896 {
8897 struct ppc_link_hash_table *htab;
8898 bfd *dynobj;
8899 asection *sdyn;
8900
8901 htab = ppc_hash_table (info);
8902 dynobj = htab->elf.dynobj;
8903 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8904
8905 if (htab->elf.dynamic_sections_created)
8906 {
8907 Elf64_External_Dyn *dyncon, *dynconend;
8908
8909 if (sdyn == NULL || htab->got == NULL)
8910 abort ();
8911
8912 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8913 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8914 for (; dyncon < dynconend; dyncon++)
8915 {
8916 Elf_Internal_Dyn dyn;
8917 asection *s;
8918
8919 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8920
8921 switch (dyn.d_tag)
8922 {
8923 default:
8924 continue;
8925
8926 case DT_PPC64_GLINK:
8927 s = htab->glink;
8928 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8929 /* We stupidly defined DT_PPC64_GLINK to be the start
8930 of glink rather than the first entry point, which is
8931 what ld.so needs, and now have a bigger stub to
8932 support automatic multiple TOCs. */
8933 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8934 break;
8935
8936 case DT_PPC64_OPD:
8937 s = bfd_get_section_by_name (output_bfd, ".opd");
8938 if (s == NULL)
8939 continue;
8940 dyn.d_un.d_ptr = s->vma;
8941 break;
8942
8943 case DT_PPC64_OPDSZ:
8944 s = bfd_get_section_by_name (output_bfd, ".opd");
8945 if (s == NULL)
8946 continue;
8947 dyn.d_un.d_val = s->_raw_size;
8948 break;
8949
8950 case DT_PLTGOT:
8951 s = htab->plt;
8952 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8953 break;
8954
8955 case DT_JMPREL:
8956 s = htab->relplt;
8957 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8958 break;
8959
8960 case DT_PLTRELSZ:
8961 dyn.d_un.d_val = htab->relplt->_raw_size;
8962 break;
8963
8964 case DT_RELASZ:
8965 /* Don't count procedure linkage table relocs in the
8966 overall reloc count. */
8967 s = htab->relplt;
8968 if (s == NULL)
8969 continue;
8970 dyn.d_un.d_val -= s->_raw_size;
8971 break;
8972
8973 case DT_RELA:
8974 /* We may not be using the standard ELF linker script.
8975 If .rela.plt is the first .rela section, we adjust
8976 DT_RELA to not include it. */
8977 s = htab->relplt;
8978 if (s == NULL)
8979 continue;
8980 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8981 continue;
8982 dyn.d_un.d_ptr += s->_raw_size;
8983 break;
8984 }
8985
8986 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8987 }
8988 }
8989
8990 if (htab->got != NULL && htab->got->_raw_size != 0)
8991 {
8992 /* Fill in the first entry in the global offset table.
8993 We use it to hold the link-time TOCbase. */
8994 bfd_put_64 (output_bfd,
8995 elf_gp (output_bfd) + TOC_BASE_OFF,
8996 htab->got->contents);
8997
8998 /* Set .got entry size. */
8999 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
9000 }
9001
9002 if (htab->plt != NULL && htab->plt->_raw_size != 0)
9003 {
9004 /* Set .plt entry size. */
9005 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
9006 = PLT_ENTRY_SIZE;
9007 }
9008
9009 /* We need to handle writing out multiple GOT sections ourselves,
9010 since we didn't add them to DYNOBJ. */
9011 while ((dynobj = dynobj->link_next) != NULL)
9012 {
9013 asection *s;
9014 s = ppc64_elf_tdata (dynobj)->got;
9015 if (s != NULL
9016 && s->_raw_size != 0
9017 && s->output_section != bfd_abs_section_ptr
9018 && !bfd_set_section_contents (output_bfd, s->output_section,
9019 s->contents, s->output_offset,
9020 s->_raw_size))
9021 return FALSE;
9022 s = ppc64_elf_tdata (dynobj)->relgot;
9023 if (s != NULL
9024 && s->_raw_size != 0
9025 && s->output_section != bfd_abs_section_ptr
9026 && !bfd_set_section_contents (output_bfd, s->output_section,
9027 s->contents, s->output_offset,
9028 s->_raw_size))
9029 return FALSE;
9030 }
9031
9032 return TRUE;
9033 }
9034
9035 #include "elf64-target.h"