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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Written by Linus Nordberg, Swox AB <info@swox.com>,
4 based on elf32-ppc.c by Ian Lance Taylor.
5 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23 /* The 64-bit PowerPC ELF ABI may be found at
24 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
25 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
26
27 #include "bfd.h"
28 #include "sysdep.h"
29 #include "bfdlink.h"
30 #include "libbfd.h"
31 #include "elf-bfd.h"
32 #include "elf/ppc64.h"
33 #include "elf64-ppc.h"
34
35 static bfd_reloc_status_type ppc64_elf_ha_reloc
36 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
37 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_toc_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_toc64_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51
52
53 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
54 #define TARGET_LITTLE_NAME "elf64-powerpcle"
55 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
56 #define TARGET_BIG_NAME "elf64-powerpc"
57 #define ELF_ARCH bfd_arch_powerpc
58 #define ELF_MACHINE_CODE EM_PPC64
59 #define ELF_MAXPAGESIZE 0x10000
60 #define elf_info_to_howto ppc64_elf_info_to_howto
61
62 #define elf_backend_want_got_sym 0
63 #define elf_backend_want_plt_sym 0
64 #define elf_backend_plt_alignment 3
65 #define elf_backend_plt_not_loaded 1
66 #define elf_backend_got_symbol_offset 0
67 #define elf_backend_got_header_size 8
68 #define elf_backend_can_gc_sections 1
69 #define elf_backend_can_refcount 1
70 #define elf_backend_rela_normal 1
71
72 #define bfd_elf64_mkobject ppc64_elf_mkobject
73 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
74 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
75 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
76 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
77 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
78
79 #define elf_backend_object_p ppc64_elf_object_p
80 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
81 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
82 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
83 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
84 #define elf_backend_check_relocs ppc64_elf_check_relocs
85 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
86 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
87 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
88 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
89 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
90 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
91 #define elf_backend_relocate_section ppc64_elf_relocate_section
92 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
93 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
94 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
95 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
96 #define elf_backend_special_sections ppc64_elf_special_sections
97
98 /* The name of the dynamic interpreter. This is put in the .interp
99 section. */
100 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
101
102 /* The size in bytes of an entry in the procedure linkage table. */
103 #define PLT_ENTRY_SIZE 24
104
105 /* The initial size of the plt reserved for the dynamic linker. */
106 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
107
108 /* TOC base pointers offset from start of TOC. */
109 #define TOC_BASE_OFF 0x8000
110
111 /* Offset of tp and dtp pointers from start of TLS block. */
112 #define TP_OFFSET 0x7000
113 #define DTP_OFFSET 0x8000
114
115 /* .plt call stub instructions. The normal stub is like this, but
116 sometimes the .plt entry crosses a 64k boundary and we need to
117 insert an addis to adjust r12. */
118 #define PLT_CALL_STUB_SIZE (7*4)
119 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
120 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
121 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
122 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
123 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
124 /* ld %r11,xxx+16@l(%r12) */
125 #define BCTR 0x4e800420 /* bctr */
126
127
128 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
129 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
130
131 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
132
133 /* glink call stub instructions. We enter with the index in R0, and the
134 address of glink entry in CTR. From that, we can calculate PLT0. */
135 #define GLINK_CALL_STUB_SIZE (16*4)
136 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */
137 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */
138 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */
139 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */
140 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */
141 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */
142 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */
143 /* sub %r12,%r12,%r11 */
144 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */
145 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */
146 /* ld %r11,xxx@l(%r12) */
147 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */
148 /* ld %r2,8(%r12) */
149 /* mtctr %r11 */
150 /* ld %r11,16(%r12) */
151 /* bctr */
152
153 /* Pad with this. */
154 #define NOP 0x60000000
155
156 /* Some other nops. */
157 #define CROR_151515 0x4def7b82
158 #define CROR_313131 0x4ffffb82
159
160 /* .glink entries for the first 32k functions are two instructions. */
161 #define LI_R0_0 0x38000000 /* li %r0,0 */
162 #define B_DOT 0x48000000 /* b . */
163
164 /* After that, we need two instructions to load the index, followed by
165 a branch. */
166 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
167 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
168
169 /* Instructions to save and restore floating point regs. */
170 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
171 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
172 #define BLR 0x4e800020 /* blr */
173
174 /* Since .opd is an array of descriptors and each entry will end up
175 with identical R_PPC64_RELATIVE relocs, there is really no need to
176 propagate .opd relocs; The dynamic linker should be taught to
177 relocate .opd without reloc entries. */
178 #ifndef NO_OPD_RELOCS
179 #define NO_OPD_RELOCS 0
180 #endif
181 \f
182 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
183
184 /* Relocation HOWTO's. */
185 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
186
187 static reloc_howto_type ppc64_elf_howto_raw[] = {
188 /* This reloc does nothing. */
189 HOWTO (R_PPC64_NONE, /* type */
190 0, /* rightshift */
191 2, /* size (0 = byte, 1 = short, 2 = long) */
192 32, /* bitsize */
193 FALSE, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_dont, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_PPC64_NONE", /* name */
198 FALSE, /* partial_inplace */
199 0, /* src_mask */
200 0, /* dst_mask */
201 FALSE), /* pcrel_offset */
202
203 /* A standard 32 bit relocation. */
204 HOWTO (R_PPC64_ADDR32, /* type */
205 0, /* rightshift */
206 2, /* size (0 = byte, 1 = short, 2 = long) */
207 32, /* bitsize */
208 FALSE, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_bitfield, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_PPC64_ADDR32", /* name */
213 FALSE, /* partial_inplace */
214 0, /* src_mask */
215 0xffffffff, /* dst_mask */
216 FALSE), /* pcrel_offset */
217
218 /* An absolute 26 bit branch; the lower two bits must be zero.
219 FIXME: we don't check that, we just clear them. */
220 HOWTO (R_PPC64_ADDR24, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 26, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_bitfield, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_ADDR24", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0x03fffffc, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* A standard 16 bit relocation. */
235 HOWTO (R_PPC64_ADDR16, /* type */
236 0, /* rightshift */
237 1, /* size (0 = byte, 1 = short, 2 = long) */
238 16, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_bitfield, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_PPC64_ADDR16", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0xffff, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* A 16 bit relocation without overflow. */
250 HOWTO (R_PPC64_ADDR16_LO, /* type */
251 0, /* rightshift */
252 1, /* size (0 = byte, 1 = short, 2 = long) */
253 16, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_dont,/* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR16_LO", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0xffff, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* Bits 16-31 of an address. */
265 HOWTO (R_PPC64_ADDR16_HI, /* type */
266 16, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_dont, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16_HI", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
280 bits, treated as a signed number, is negative. */
281 HOWTO (R_PPC64_ADDR16_HA, /* type */
282 16, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 ppc64_elf_ha_reloc, /* special_function */
289 "R_PPC64_ADDR16_HA", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* An absolute 16 bit branch; the lower two bits must be zero.
296 FIXME: we don't check that, we just clear them. */
297 HOWTO (R_PPC64_ADDR14, /* type */
298 0, /* rightshift */
299 2, /* size (0 = byte, 1 = short, 2 = long) */
300 16, /* bitsize */
301 FALSE, /* pc_relative */
302 0, /* bitpos */
303 complain_overflow_bitfield, /* complain_on_overflow */
304 bfd_elf_generic_reloc, /* special_function */
305 "R_PPC64_ADDR14", /* name */
306 FALSE, /* partial_inplace */
307 0, /* src_mask */
308 0x0000fffc, /* dst_mask */
309 FALSE), /* pcrel_offset */
310
311 /* An absolute 16 bit branch, for which bit 10 should be set to
312 indicate that the branch is expected to be taken. The lower two
313 bits must be zero. */
314 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
315 0, /* rightshift */
316 2, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_bitfield, /* complain_on_overflow */
321 ppc64_elf_brtaken_reloc, /* special_function */
322 "R_PPC64_ADDR14_BRTAKEN",/* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0x0000fffc, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* An absolute 16 bit branch, for which bit 10 should be set to
329 indicate that the branch is not expected to be taken. The lower
330 two bits must be zero. */
331 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
332 0, /* rightshift */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
334 16, /* bitsize */
335 FALSE, /* pc_relative */
336 0, /* bitpos */
337 complain_overflow_bitfield, /* complain_on_overflow */
338 ppc64_elf_brtaken_reloc, /* special_function */
339 "R_PPC64_ADDR14_BRNTAKEN",/* name */
340 FALSE, /* partial_inplace */
341 0, /* src_mask */
342 0x0000fffc, /* dst_mask */
343 FALSE), /* pcrel_offset */
344
345 /* A relative 26 bit branch; the lower two bits must be zero. */
346 HOWTO (R_PPC64_REL24, /* type */
347 0, /* rightshift */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
349 26, /* bitsize */
350 TRUE, /* pc_relative */
351 0, /* bitpos */
352 complain_overflow_signed, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_PPC64_REL24", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0x03fffffc, /* dst_mask */
358 TRUE), /* pcrel_offset */
359
360 /* A relative 16 bit branch; the lower two bits must be zero. */
361 HOWTO (R_PPC64_REL14, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 TRUE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_signed, /* complain_on_overflow */
368 bfd_elf_generic_reloc, /* special_function */
369 "R_PPC64_REL14", /* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 TRUE), /* pcrel_offset */
374
375 /* A relative 16 bit branch. Bit 10 should be set to indicate that
376 the branch is expected to be taken. The lower two bits must be
377 zero. */
378 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
379 0, /* rightshift */
380 2, /* size (0 = byte, 1 = short, 2 = long) */
381 16, /* bitsize */
382 TRUE, /* pc_relative */
383 0, /* bitpos */
384 complain_overflow_signed, /* complain_on_overflow */
385 ppc64_elf_brtaken_reloc, /* special_function */
386 "R_PPC64_REL14_BRTAKEN", /* name */
387 FALSE, /* partial_inplace */
388 0, /* src_mask */
389 0x0000fffc, /* dst_mask */
390 TRUE), /* pcrel_offset */
391
392 /* A relative 16 bit branch. Bit 10 should be set to indicate that
393 the branch is not expected to be taken. The lower two bits must
394 be zero. */
395 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
396 0, /* rightshift */
397 2, /* size (0 = byte, 1 = short, 2 = long) */
398 16, /* bitsize */
399 TRUE, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_signed, /* complain_on_overflow */
402 ppc64_elf_brtaken_reloc, /* special_function */
403 "R_PPC64_REL14_BRNTAKEN",/* name */
404 FALSE, /* partial_inplace */
405 0, /* src_mask */
406 0x0000fffc, /* dst_mask */
407 TRUE), /* pcrel_offset */
408
409 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
410 symbol. */
411 HOWTO (R_PPC64_GOT16, /* type */
412 0, /* rightshift */
413 1, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 FALSE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_unhandled_reloc, /* special_function */
419 "R_PPC64_GOT16", /* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0xffff, /* dst_mask */
423 FALSE), /* pcrel_offset */
424
425 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
426 the symbol. */
427 HOWTO (R_PPC64_GOT16_LO, /* type */
428 0, /* rightshift */
429 1, /* size (0 = byte, 1 = short, 2 = long) */
430 16, /* bitsize */
431 FALSE, /* pc_relative */
432 0, /* bitpos */
433 complain_overflow_dont, /* complain_on_overflow */
434 ppc64_elf_unhandled_reloc, /* special_function */
435 "R_PPC64_GOT16_LO", /* name */
436 FALSE, /* partial_inplace */
437 0, /* src_mask */
438 0xffff, /* dst_mask */
439 FALSE), /* pcrel_offset */
440
441 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
442 the symbol. */
443 HOWTO (R_PPC64_GOT16_HI, /* type */
444 16, /* rightshift */
445 1, /* size (0 = byte, 1 = short, 2 = long) */
446 16, /* bitsize */
447 FALSE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont,/* complain_on_overflow */
450 ppc64_elf_unhandled_reloc, /* special_function */
451 "R_PPC64_GOT16_HI", /* name */
452 FALSE, /* partial_inplace */
453 0, /* src_mask */
454 0xffff, /* dst_mask */
455 FALSE), /* pcrel_offset */
456
457 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
458 the symbol. */
459 HOWTO (R_PPC64_GOT16_HA, /* type */
460 16, /* rightshift */
461 1, /* size (0 = byte, 1 = short, 2 = long) */
462 16, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_dont,/* complain_on_overflow */
466 ppc64_elf_unhandled_reloc, /* special_function */
467 "R_PPC64_GOT16_HA", /* name */
468 FALSE, /* partial_inplace */
469 0, /* src_mask */
470 0xffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 /* This is used only by the dynamic linker. The symbol should exist
474 both in the object being run and in some shared library. The
475 dynamic linker copies the data addressed by the symbol from the
476 shared library into the object, because the object being
477 run has to have the data at some particular address. */
478 HOWTO (R_PPC64_COPY, /* type */
479 0, /* rightshift */
480 0, /* this one is variable size */
481 0, /* bitsize */
482 FALSE, /* pc_relative */
483 0, /* bitpos */
484 complain_overflow_dont, /* complain_on_overflow */
485 ppc64_elf_unhandled_reloc, /* special_function */
486 "R_PPC64_COPY", /* name */
487 FALSE, /* partial_inplace */
488 0, /* src_mask */
489 0, /* dst_mask */
490 FALSE), /* pcrel_offset */
491
492 /* Like R_PPC64_ADDR64, but used when setting global offset table
493 entries. */
494 HOWTO (R_PPC64_GLOB_DAT, /* type */
495 0, /* rightshift */
496 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
497 64, /* bitsize */
498 FALSE, /* pc_relative */
499 0, /* bitpos */
500 complain_overflow_dont, /* complain_on_overflow */
501 ppc64_elf_unhandled_reloc, /* special_function */
502 "R_PPC64_GLOB_DAT", /* name */
503 FALSE, /* partial_inplace */
504 0, /* src_mask */
505 ONES (64), /* dst_mask */
506 FALSE), /* pcrel_offset */
507
508 /* Created by the link editor. Marks a procedure linkage table
509 entry for a symbol. */
510 HOWTO (R_PPC64_JMP_SLOT, /* type */
511 0, /* rightshift */
512 0, /* size (0 = byte, 1 = short, 2 = long) */
513 0, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 ppc64_elf_unhandled_reloc, /* special_function */
518 "R_PPC64_JMP_SLOT", /* name */
519 FALSE, /* partial_inplace */
520 0, /* src_mask */
521 0, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Used only by the dynamic linker. When the object is run, this
525 doubleword64 is set to the load address of the object, plus the
526 addend. */
527 HOWTO (R_PPC64_RELATIVE, /* type */
528 0, /* rightshift */
529 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
530 64, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 bfd_elf_generic_reloc, /* special_function */
535 "R_PPC64_RELATIVE", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 ONES (64), /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Like R_PPC64_ADDR32, but may be unaligned. */
542 HOWTO (R_PPC64_UADDR32, /* type */
543 0, /* rightshift */
544 2, /* size (0 = byte, 1 = short, 2 = long) */
545 32, /* bitsize */
546 FALSE, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_bitfield, /* complain_on_overflow */
549 bfd_elf_generic_reloc, /* special_function */
550 "R_PPC64_UADDR32", /* name */
551 FALSE, /* partial_inplace */
552 0, /* src_mask */
553 0xffffffff, /* dst_mask */
554 FALSE), /* pcrel_offset */
555
556 /* Like R_PPC64_ADDR16, but may be unaligned. */
557 HOWTO (R_PPC64_UADDR16, /* type */
558 0, /* rightshift */
559 1, /* size (0 = byte, 1 = short, 2 = long) */
560 16, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_bitfield, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_UADDR16", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0xffff, /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* 32-bit PC relative. */
572 HOWTO (R_PPC64_REL32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 TRUE, /* pc_relative */
577 0, /* bitpos */
578 /* FIXME: Verify. Was complain_overflow_bitfield. */
579 complain_overflow_signed, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_REL32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 TRUE), /* pcrel_offset */
586
587 /* 32-bit relocation to the symbol's procedure linkage table. */
588 HOWTO (R_PPC64_PLT32, /* type */
589 0, /* rightshift */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
591 32, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 ppc64_elf_unhandled_reloc, /* special_function */
596 "R_PPC64_PLT32", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffffffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
603 FIXME: R_PPC64_PLTREL32 not supported. */
604 HOWTO (R_PPC64_PLTREL32, /* type */
605 0, /* rightshift */
606 2, /* size (0 = byte, 1 = short, 2 = long) */
607 32, /* bitsize */
608 TRUE, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_signed, /* complain_on_overflow */
611 bfd_elf_generic_reloc, /* special_function */
612 "R_PPC64_PLTREL32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 TRUE), /* pcrel_offset */
617
618 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
619 the symbol. */
620 HOWTO (R_PPC64_PLT16_LO, /* type */
621 0, /* rightshift */
622 1, /* size (0 = byte, 1 = short, 2 = long) */
623 16, /* bitsize */
624 FALSE, /* pc_relative */
625 0, /* bitpos */
626 complain_overflow_dont, /* complain_on_overflow */
627 ppc64_elf_unhandled_reloc, /* special_function */
628 "R_PPC64_PLT16_LO", /* name */
629 FALSE, /* partial_inplace */
630 0, /* src_mask */
631 0xffff, /* dst_mask */
632 FALSE), /* pcrel_offset */
633
634 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
635 the symbol. */
636 HOWTO (R_PPC64_PLT16_HI, /* type */
637 16, /* rightshift */
638 1, /* size (0 = byte, 1 = short, 2 = long) */
639 16, /* bitsize */
640 FALSE, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_dont, /* complain_on_overflow */
643 ppc64_elf_unhandled_reloc, /* special_function */
644 "R_PPC64_PLT16_HI", /* name */
645 FALSE, /* partial_inplace */
646 0, /* src_mask */
647 0xffff, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
651 the symbol. */
652 HOWTO (R_PPC64_PLT16_HA, /* type */
653 16, /* rightshift */
654 1, /* size (0 = byte, 1 = short, 2 = long) */
655 16, /* bitsize */
656 FALSE, /* pc_relative */
657 0, /* bitpos */
658 complain_overflow_dont, /* complain_on_overflow */
659 ppc64_elf_unhandled_reloc, /* special_function */
660 "R_PPC64_PLT16_HA", /* name */
661 FALSE, /* partial_inplace */
662 0, /* src_mask */
663 0xffff, /* dst_mask */
664 FALSE), /* pcrel_offset */
665
666 /* 16-bit section relative relocation. */
667 HOWTO (R_PPC64_SECTOFF, /* type */
668 0, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_bitfield, /* complain_on_overflow */
674 ppc64_elf_sectoff_reloc, /* special_function */
675 "R_PPC64_SECTOFF", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC64_SECTOFF, but no overflow warning. */
682 HOWTO (R_PPC64_SECTOFF_LO, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_sectoff_reloc, /* special_function */
690 "R_PPC64_SECTOFF_LO", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit upper half section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF_HI, /* type */
698 16, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_dont, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF_HI", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit upper half adjusted section relative relocation. */
712 HOWTO (R_PPC64_SECTOFF_HA, /* type */
713 16, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_ha_reloc, /* special_function */
720 "R_PPC64_SECTOFF_HA", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* Like R_PPC64_REL24 without touching the two least significant bits. */
727 HOWTO (R_PPC64_REL30, /* type */
728 2, /* rightshift */
729 2, /* size (0 = byte, 1 = short, 2 = long) */
730 30, /* bitsize */
731 TRUE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_PPC64_REL30", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xfffffffc, /* dst_mask */
739 TRUE), /* pcrel_offset */
740
741 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
742
743 /* A standard 64-bit relocation. */
744 HOWTO (R_PPC64_ADDR64, /* type */
745 0, /* rightshift */
746 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
747 64, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC64_ADDR64", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 ONES (64), /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* The bits 32-47 of an address. */
759 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
760 32, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_PPC64_ADDR16_HIGHER", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* The bits 32-47 of an address, plus 1 if the contents of the low
774 16 bits, treated as a signed number, is negative. */
775 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
776 32, /* rightshift */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
778 16, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 ppc64_elf_ha_reloc, /* special_function */
783 "R_PPC64_ADDR16_HIGHERA", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 48-63 of an address. */
790 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
791 48, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_PPC64_ADDR16_HIGHEST", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The bits 48-63 of an address, plus 1 if the contents of the low
805 16 bits, treated as a signed number, is negative. */
806 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
807 48, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 ppc64_elf_ha_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHESTA", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* Like ADDR64, but may be unaligned. */
821 HOWTO (R_PPC64_UADDR64, /* type */
822 0, /* rightshift */
823 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
824 64, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_PPC64_UADDR64", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 ONES (64), /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* 64-bit relative relocation. */
836 HOWTO (R_PPC64_REL64, /* type */
837 0, /* rightshift */
838 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
839 64, /* bitsize */
840 TRUE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC64_REL64", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 ONES (64), /* dst_mask */
848 TRUE), /* pcrel_offset */
849
850 /* 64-bit relocation to the symbol's procedure linkage table. */
851 HOWTO (R_PPC64_PLT64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 ppc64_elf_unhandled_reloc, /* special_function */
859 "R_PPC64_PLT64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit PC relative relocation to the symbol's procedure linkage
866 table. */
867 /* FIXME: R_PPC64_PLTREL64 not supported. */
868 HOWTO (R_PPC64_PLTREL64, /* type */
869 0, /* rightshift */
870 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
871 64, /* bitsize */
872 TRUE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 ppc64_elf_unhandled_reloc, /* special_function */
876 "R_PPC64_PLTREL64", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 ONES (64), /* dst_mask */
880 TRUE), /* pcrel_offset */
881
882 /* 16 bit TOC-relative relocation. */
883
884 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
885 HOWTO (R_PPC64_TOC16, /* type */
886 0, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_signed, /* complain_on_overflow */
892 ppc64_elf_toc_reloc, /* special_function */
893 "R_PPC64_TOC16", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* 16 bit TOC-relative relocation without overflow. */
900
901 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
902 HOWTO (R_PPC64_TOC16_LO, /* type */
903 0, /* rightshift */
904 1, /* size (0 = byte, 1 = short, 2 = long) */
905 16, /* bitsize */
906 FALSE, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_dont, /* complain_on_overflow */
909 ppc64_elf_toc_reloc, /* special_function */
910 "R_PPC64_TOC16_LO", /* name */
911 FALSE, /* partial_inplace */
912 0, /* src_mask */
913 0xffff, /* dst_mask */
914 FALSE), /* pcrel_offset */
915
916 /* 16 bit TOC-relative relocation, high 16 bits. */
917
918 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
919 HOWTO (R_PPC64_TOC16_HI, /* type */
920 16, /* rightshift */
921 1, /* size (0 = byte, 1 = short, 2 = long) */
922 16, /* bitsize */
923 FALSE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont, /* complain_on_overflow */
926 ppc64_elf_toc_reloc, /* special_function */
927 "R_PPC64_TOC16_HI", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 0xffff, /* dst_mask */
931 FALSE), /* pcrel_offset */
932
933 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
934 contents of the low 16 bits, treated as a signed number, is
935 negative. */
936
937 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
938 HOWTO (R_PPC64_TOC16_HA, /* type */
939 16, /* rightshift */
940 1, /* size (0 = byte, 1 = short, 2 = long) */
941 16, /* bitsize */
942 FALSE, /* pc_relative */
943 0, /* bitpos */
944 complain_overflow_dont, /* complain_on_overflow */
945 ppc64_elf_toc_ha_reloc, /* special_function */
946 "R_PPC64_TOC16_HA", /* name */
947 FALSE, /* partial_inplace */
948 0, /* src_mask */
949 0xffff, /* dst_mask */
950 FALSE), /* pcrel_offset */
951
952 /* 64-bit relocation; insert value of TOC base (.TOC.). */
953
954 /* R_PPC64_TOC 51 doubleword64 .TOC. */
955 HOWTO (R_PPC64_TOC, /* type */
956 0, /* rightshift */
957 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
958 64, /* bitsize */
959 FALSE, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_bitfield, /* complain_on_overflow */
962 ppc64_elf_toc64_reloc, /* special_function */
963 "R_PPC64_TOC", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 ONES (64), /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* Like R_PPC64_GOT16, but also informs the link editor that the
970 value to relocate may (!) refer to a PLT entry which the link
971 editor (a) may replace with the symbol value. If the link editor
972 is unable to fully resolve the symbol, it may (b) create a PLT
973 entry and store the address to the new PLT entry in the GOT.
974 This permits lazy resolution of function symbols at run time.
975 The link editor may also skip all of this and just (c) emit a
976 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
977 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
978 HOWTO (R_PPC64_PLTGOT16, /* type */
979 0, /* rightshift */
980 1, /* size (0 = byte, 1 = short, 2 = long) */
981 16, /* bitsize */
982 FALSE, /* pc_relative */
983 0, /* bitpos */
984 complain_overflow_signed, /* complain_on_overflow */
985 ppc64_elf_unhandled_reloc, /* special_function */
986 "R_PPC64_PLTGOT16", /* name */
987 FALSE, /* partial_inplace */
988 0, /* src_mask */
989 0xffff, /* dst_mask */
990 FALSE), /* pcrel_offset */
991
992 /* Like R_PPC64_PLTGOT16, but without overflow. */
993 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
994 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_dont, /* complain_on_overflow */
1001 ppc64_elf_unhandled_reloc, /* special_function */
1002 "R_PPC64_PLTGOT16_LO", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1009 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1010 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1011 16, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc64_elf_unhandled_reloc, /* special_function */
1018 "R_PPC64_PLTGOT16_HI", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1025 1 if the contents of the low 16 bits, treated as a signed number,
1026 is negative. */
1027 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1028 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1029 16, /* rightshift */
1030 1, /* size (0 = byte, 1 = short, 2 = long) */
1031 16, /* bitsize */
1032 FALSE, /* pc_relative */
1033 0, /* bitpos */
1034 complain_overflow_dont,/* complain_on_overflow */
1035 ppc64_elf_unhandled_reloc, /* special_function */
1036 "R_PPC64_PLTGOT16_HA", /* name */
1037 FALSE, /* partial_inplace */
1038 0, /* src_mask */
1039 0xffff, /* dst_mask */
1040 FALSE), /* pcrel_offset */
1041
1042 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1043 HOWTO (R_PPC64_ADDR16_DS, /* type */
1044 0, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_bitfield, /* complain_on_overflow */
1050 bfd_elf_generic_reloc, /* special_function */
1051 "R_PPC64_ADDR16_DS", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xfffc, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1058 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 bfd_elf_generic_reloc, /* special_function */
1066 "R_PPC64_ADDR16_LO_DS",/* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xfffc, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_GOT16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_signed, /* complain_on_overflow */
1080 ppc64_elf_unhandled_reloc, /* special_function */
1081 "R_PPC64_GOT16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc64_elf_unhandled_reloc, /* special_function */
1096 "R_PPC64_GOT16_LO_DS", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_PLT16_LO_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_bitfield, /* complain_on_overflow */
1125 ppc64_elf_sectoff_reloc, /* special_function */
1126 "R_PPC64_SECTOFF_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_sectoff_reloc, /* special_function */
1141 "R_PPC64_SECTOFF_LO_DS",/* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_TOC16_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_signed, /* complain_on_overflow */
1155 ppc64_elf_toc_reloc, /* special_function */
1156 "R_PPC64_TOC16_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_toc_reloc, /* special_function */
1171 "R_PPC64_TOC16_LO_DS", /* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1178 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1179 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_signed, /* complain_on_overflow */
1186 ppc64_elf_unhandled_reloc, /* special_function */
1187 "R_PPC64_PLTGOT16_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1194 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1195 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1196 0, /* rightshift */
1197 1, /* size (0 = byte, 1 = short, 2 = long) */
1198 16, /* bitsize */
1199 FALSE, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_dont, /* complain_on_overflow */
1202 ppc64_elf_unhandled_reloc, /* special_function */
1203 "R_PPC64_PLTGOT16_LO_DS",/* name */
1204 FALSE, /* partial_inplace */
1205 0, /* src_mask */
1206 0xfffc, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1208
1209 /* Marker reloc for TLS. */
1210 HOWTO (R_PPC64_TLS,
1211 0, /* rightshift */
1212 2, /* size (0 = byte, 1 = short, 2 = long) */
1213 32, /* bitsize */
1214 FALSE, /* pc_relative */
1215 0, /* bitpos */
1216 complain_overflow_dont, /* complain_on_overflow */
1217 bfd_elf_generic_reloc, /* special_function */
1218 "R_PPC64_TLS", /* name */
1219 FALSE, /* partial_inplace */
1220 0, /* src_mask */
1221 0, /* dst_mask */
1222 FALSE), /* pcrel_offset */
1223
1224 /* Computes the load module index of the load module that contains the
1225 definition of its TLS sym. */
1226 HOWTO (R_PPC64_DTPMOD64,
1227 0, /* rightshift */
1228 4, /* size (0 = byte, 1 = short, 2 = long) */
1229 64, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 ppc64_elf_unhandled_reloc, /* special_function */
1234 "R_PPC64_DTPMOD64", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 ONES (64), /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Computes a dtv-relative displacement, the difference between the value
1241 of sym+add and the base address of the thread-local storage block that
1242 contains the definition of sym, minus 0x8000. */
1243 HOWTO (R_PPC64_DTPREL64,
1244 0, /* rightshift */
1245 4, /* size (0 = byte, 1 = short, 2 = long) */
1246 64, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_dont, /* complain_on_overflow */
1250 ppc64_elf_unhandled_reloc, /* special_function */
1251 "R_PPC64_DTPREL64", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 ONES (64), /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 /* A 16 bit dtprel reloc. */
1258 HOWTO (R_PPC64_DTPREL16,
1259 0, /* rightshift */
1260 1, /* size (0 = byte, 1 = short, 2 = long) */
1261 16, /* bitsize */
1262 FALSE, /* pc_relative */
1263 0, /* bitpos */
1264 complain_overflow_signed, /* complain_on_overflow */
1265 ppc64_elf_unhandled_reloc, /* special_function */
1266 "R_PPC64_DTPREL16", /* name */
1267 FALSE, /* partial_inplace */
1268 0, /* src_mask */
1269 0xffff, /* dst_mask */
1270 FALSE), /* pcrel_offset */
1271
1272 /* Like DTPREL16, but no overflow. */
1273 HOWTO (R_PPC64_DTPREL16_LO,
1274 0, /* rightshift */
1275 1, /* size (0 = byte, 1 = short, 2 = long) */
1276 16, /* bitsize */
1277 FALSE, /* pc_relative */
1278 0, /* bitpos */
1279 complain_overflow_dont, /* complain_on_overflow */
1280 ppc64_elf_unhandled_reloc, /* special_function */
1281 "R_PPC64_DTPREL16_LO", /* name */
1282 FALSE, /* partial_inplace */
1283 0, /* src_mask */
1284 0xffff, /* dst_mask */
1285 FALSE), /* pcrel_offset */
1286
1287 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1288 HOWTO (R_PPC64_DTPREL16_HI,
1289 16, /* rightshift */
1290 1, /* size (0 = byte, 1 = short, 2 = long) */
1291 16, /* bitsize */
1292 FALSE, /* pc_relative */
1293 0, /* bitpos */
1294 complain_overflow_dont, /* complain_on_overflow */
1295 ppc64_elf_unhandled_reloc, /* special_function */
1296 "R_PPC64_DTPREL16_HI", /* name */
1297 FALSE, /* partial_inplace */
1298 0, /* src_mask */
1299 0xffff, /* dst_mask */
1300 FALSE), /* pcrel_offset */
1301
1302 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1303 HOWTO (R_PPC64_DTPREL16_HA,
1304 16, /* rightshift */
1305 1, /* size (0 = byte, 1 = short, 2 = long) */
1306 16, /* bitsize */
1307 FALSE, /* pc_relative */
1308 0, /* bitpos */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 ppc64_elf_unhandled_reloc, /* special_function */
1311 "R_PPC64_DTPREL16_HA", /* name */
1312 FALSE, /* partial_inplace */
1313 0, /* src_mask */
1314 0xffff, /* dst_mask */
1315 FALSE), /* pcrel_offset */
1316
1317 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1318 HOWTO (R_PPC64_DTPREL16_HIGHER,
1319 32, /* rightshift */
1320 1, /* size (0 = byte, 1 = short, 2 = long) */
1321 16, /* bitsize */
1322 FALSE, /* pc_relative */
1323 0, /* bitpos */
1324 complain_overflow_dont, /* complain_on_overflow */
1325 ppc64_elf_unhandled_reloc, /* special_function */
1326 "R_PPC64_DTPREL16_HIGHER", /* name */
1327 FALSE, /* partial_inplace */
1328 0, /* src_mask */
1329 0xffff, /* dst_mask */
1330 FALSE), /* pcrel_offset */
1331
1332 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1333 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1334 32, /* rightshift */
1335 1, /* size (0 = byte, 1 = short, 2 = long) */
1336 16, /* bitsize */
1337 FALSE, /* pc_relative */
1338 0, /* bitpos */
1339 complain_overflow_dont, /* complain_on_overflow */
1340 ppc64_elf_unhandled_reloc, /* special_function */
1341 "R_PPC64_DTPREL16_HIGHERA", /* name */
1342 FALSE, /* partial_inplace */
1343 0, /* src_mask */
1344 0xffff, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1346
1347 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1348 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1349 48, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_dont, /* complain_on_overflow */
1355 ppc64_elf_unhandled_reloc, /* special_function */
1356 "R_PPC64_DTPREL16_HIGHEST", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1363 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1364 48, /* rightshift */
1365 1, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_dont, /* complain_on_overflow */
1370 ppc64_elf_unhandled_reloc, /* special_function */
1371 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Like DTPREL16, but for insns with a DS field. */
1378 HOWTO (R_PPC64_DTPREL16_DS,
1379 0, /* rightshift */
1380 1, /* size (0 = byte, 1 = short, 2 = long) */
1381 16, /* bitsize */
1382 FALSE, /* pc_relative */
1383 0, /* bitpos */
1384 complain_overflow_signed, /* complain_on_overflow */
1385 ppc64_elf_unhandled_reloc, /* special_function */
1386 "R_PPC64_DTPREL16_DS", /* name */
1387 FALSE, /* partial_inplace */
1388 0, /* src_mask */
1389 0xfffc, /* dst_mask */
1390 FALSE), /* pcrel_offset */
1391
1392 /* Like DTPREL16_DS, but no overflow. */
1393 HOWTO (R_PPC64_DTPREL16_LO_DS,
1394 0, /* rightshift */
1395 1, /* size (0 = byte, 1 = short, 2 = long) */
1396 16, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_dont, /* complain_on_overflow */
1400 ppc64_elf_unhandled_reloc, /* special_function */
1401 "R_PPC64_DTPREL16_LO_DS", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xfffc, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* Computes a tp-relative displacement, the difference between the value of
1408 sym+add and the value of the thread pointer (r13). */
1409 HOWTO (R_PPC64_TPREL64,
1410 0, /* rightshift */
1411 4, /* size (0 = byte, 1 = short, 2 = long) */
1412 64, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_TPREL64", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 ONES (64), /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* A 16 bit tprel reloc. */
1424 HOWTO (R_PPC64_TPREL16,
1425 0, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_signed, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_TPREL16", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like TPREL16, but no overflow. */
1439 HOWTO (R_PPC64_TPREL16_LO,
1440 0, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_TPREL16_LO", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like TPREL16_LO, but next higher group of 16 bits. */
1454 HOWTO (R_PPC64_TPREL16_HI,
1455 16, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_TPREL16_HI", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Like TPREL16_HI, but adjust for low 16 bits. */
1469 HOWTO (R_PPC64_TPREL16_HA,
1470 16, /* rightshift */
1471 1, /* size (0 = byte, 1 = short, 2 = long) */
1472 16, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 ppc64_elf_unhandled_reloc, /* special_function */
1477 "R_PPC64_TPREL16_HA", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0xffff, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* Like TPREL16_HI, but next higher group of 16 bits. */
1484 HOWTO (R_PPC64_TPREL16_HIGHER,
1485 32, /* rightshift */
1486 1, /* size (0 = byte, 1 = short, 2 = long) */
1487 16, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_TPREL16_HIGHER", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0xffff, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1499 HOWTO (R_PPC64_TPREL16_HIGHERA,
1500 32, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_dont, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_TPREL16_HIGHERA", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1514 HOWTO (R_PPC64_TPREL16_HIGHEST,
1515 48, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_TPREL16_HIGHEST", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1529 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1530 48, /* rightshift */
1531 1, /* size (0 = byte, 1 = short, 2 = long) */
1532 16, /* bitsize */
1533 FALSE, /* pc_relative */
1534 0, /* bitpos */
1535 complain_overflow_dont, /* complain_on_overflow */
1536 ppc64_elf_unhandled_reloc, /* special_function */
1537 "R_PPC64_TPREL16_HIGHESTA", /* name */
1538 FALSE, /* partial_inplace */
1539 0, /* src_mask */
1540 0xffff, /* dst_mask */
1541 FALSE), /* pcrel_offset */
1542
1543 /* Like TPREL16, but for insns with a DS field. */
1544 HOWTO (R_PPC64_TPREL16_DS,
1545 0, /* rightshift */
1546 1, /* size (0 = byte, 1 = short, 2 = long) */
1547 16, /* bitsize */
1548 FALSE, /* pc_relative */
1549 0, /* bitpos */
1550 complain_overflow_signed, /* complain_on_overflow */
1551 ppc64_elf_unhandled_reloc, /* special_function */
1552 "R_PPC64_TPREL16_DS", /* name */
1553 FALSE, /* partial_inplace */
1554 0, /* src_mask */
1555 0xfffc, /* dst_mask */
1556 FALSE), /* pcrel_offset */
1557
1558 /* Like TPREL16_DS, but no overflow. */
1559 HOWTO (R_PPC64_TPREL16_LO_DS,
1560 0, /* rightshift */
1561 1, /* size (0 = byte, 1 = short, 2 = long) */
1562 16, /* bitsize */
1563 FALSE, /* pc_relative */
1564 0, /* bitpos */
1565 complain_overflow_dont, /* complain_on_overflow */
1566 ppc64_elf_unhandled_reloc, /* special_function */
1567 "R_PPC64_TPREL16_LO_DS", /* name */
1568 FALSE, /* partial_inplace */
1569 0, /* src_mask */
1570 0xfffc, /* dst_mask */
1571 FALSE), /* pcrel_offset */
1572
1573 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1574 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1575 to the first entry relative to the TOC base (r2). */
1576 HOWTO (R_PPC64_GOT_TLSGD16,
1577 0, /* rightshift */
1578 1, /* size (0 = byte, 1 = short, 2 = long) */
1579 16, /* bitsize */
1580 FALSE, /* pc_relative */
1581 0, /* bitpos */
1582 complain_overflow_signed, /* complain_on_overflow */
1583 ppc64_elf_unhandled_reloc, /* special_function */
1584 "R_PPC64_GOT_TLSGD16", /* name */
1585 FALSE, /* partial_inplace */
1586 0, /* src_mask */
1587 0xffff, /* dst_mask */
1588 FALSE), /* pcrel_offset */
1589
1590 /* Like GOT_TLSGD16, but no overflow. */
1591 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1592 0, /* rightshift */
1593 1, /* size (0 = byte, 1 = short, 2 = long) */
1594 16, /* bitsize */
1595 FALSE, /* pc_relative */
1596 0, /* bitpos */
1597 complain_overflow_dont, /* complain_on_overflow */
1598 ppc64_elf_unhandled_reloc, /* special_function */
1599 "R_PPC64_GOT_TLSGD16_LO", /* name */
1600 FALSE, /* partial_inplace */
1601 0, /* src_mask */
1602 0xffff, /* dst_mask */
1603 FALSE), /* pcrel_offset */
1604
1605 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1606 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1607 16, /* rightshift */
1608 1, /* size (0 = byte, 1 = short, 2 = long) */
1609 16, /* bitsize */
1610 FALSE, /* pc_relative */
1611 0, /* bitpos */
1612 complain_overflow_dont, /* complain_on_overflow */
1613 ppc64_elf_unhandled_reloc, /* special_function */
1614 "R_PPC64_GOT_TLSGD16_HI", /* name */
1615 FALSE, /* partial_inplace */
1616 0, /* src_mask */
1617 0xffff, /* dst_mask */
1618 FALSE), /* pcrel_offset */
1619
1620 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1621 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1622 16, /* rightshift */
1623 1, /* size (0 = byte, 1 = short, 2 = long) */
1624 16, /* bitsize */
1625 FALSE, /* pc_relative */
1626 0, /* bitpos */
1627 complain_overflow_dont, /* complain_on_overflow */
1628 ppc64_elf_unhandled_reloc, /* special_function */
1629 "R_PPC64_GOT_TLSGD16_HA", /* name */
1630 FALSE, /* partial_inplace */
1631 0, /* src_mask */
1632 0xffff, /* dst_mask */
1633 FALSE), /* pcrel_offset */
1634
1635 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1636 with values (sym+add)@dtpmod and zero, and computes the offset to the
1637 first entry relative to the TOC base (r2). */
1638 HOWTO (R_PPC64_GOT_TLSLD16,
1639 0, /* rightshift */
1640 1, /* size (0 = byte, 1 = short, 2 = long) */
1641 16, /* bitsize */
1642 FALSE, /* pc_relative */
1643 0, /* bitpos */
1644 complain_overflow_signed, /* complain_on_overflow */
1645 ppc64_elf_unhandled_reloc, /* special_function */
1646 "R_PPC64_GOT_TLSLD16", /* name */
1647 FALSE, /* partial_inplace */
1648 0, /* src_mask */
1649 0xffff, /* dst_mask */
1650 FALSE), /* pcrel_offset */
1651
1652 /* Like GOT_TLSLD16, but no overflow. */
1653 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1654 0, /* rightshift */
1655 1, /* size (0 = byte, 1 = short, 2 = long) */
1656 16, /* bitsize */
1657 FALSE, /* pc_relative */
1658 0, /* bitpos */
1659 complain_overflow_dont, /* complain_on_overflow */
1660 ppc64_elf_unhandled_reloc, /* special_function */
1661 "R_PPC64_GOT_TLSLD16_LO", /* name */
1662 FALSE, /* partial_inplace */
1663 0, /* src_mask */
1664 0xffff, /* dst_mask */
1665 FALSE), /* pcrel_offset */
1666
1667 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1668 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1669 16, /* rightshift */
1670 1, /* size (0 = byte, 1 = short, 2 = long) */
1671 16, /* bitsize */
1672 FALSE, /* pc_relative */
1673 0, /* bitpos */
1674 complain_overflow_dont, /* complain_on_overflow */
1675 ppc64_elf_unhandled_reloc, /* special_function */
1676 "R_PPC64_GOT_TLSLD16_HI", /* name */
1677 FALSE, /* partial_inplace */
1678 0, /* src_mask */
1679 0xffff, /* dst_mask */
1680 FALSE), /* pcrel_offset */
1681
1682 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1683 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1684 16, /* rightshift */
1685 1, /* size (0 = byte, 1 = short, 2 = long) */
1686 16, /* bitsize */
1687 FALSE, /* pc_relative */
1688 0, /* bitpos */
1689 complain_overflow_dont, /* complain_on_overflow */
1690 ppc64_elf_unhandled_reloc, /* special_function */
1691 "R_PPC64_GOT_TLSLD16_HA", /* name */
1692 FALSE, /* partial_inplace */
1693 0, /* src_mask */
1694 0xffff, /* dst_mask */
1695 FALSE), /* pcrel_offset */
1696
1697 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1698 the offset to the entry relative to the TOC base (r2). */
1699 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1700 0, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_signed, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_DTPREL16_DS", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xfffc, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Like GOT_DTPREL16_DS, but no overflow. */
1714 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1715 0, /* rightshift */
1716 1, /* size (0 = byte, 1 = short, 2 = long) */
1717 16, /* bitsize */
1718 FALSE, /* pc_relative */
1719 0, /* bitpos */
1720 complain_overflow_dont, /* complain_on_overflow */
1721 ppc64_elf_unhandled_reloc, /* special_function */
1722 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1723 FALSE, /* partial_inplace */
1724 0, /* src_mask */
1725 0xfffc, /* dst_mask */
1726 FALSE), /* pcrel_offset */
1727
1728 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1729 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1730 16, /* rightshift */
1731 1, /* size (0 = byte, 1 = short, 2 = long) */
1732 16, /* bitsize */
1733 FALSE, /* pc_relative */
1734 0, /* bitpos */
1735 complain_overflow_dont, /* complain_on_overflow */
1736 ppc64_elf_unhandled_reloc, /* special_function */
1737 "R_PPC64_GOT_DTPREL16_HI", /* name */
1738 FALSE, /* partial_inplace */
1739 0, /* src_mask */
1740 0xffff, /* dst_mask */
1741 FALSE), /* pcrel_offset */
1742
1743 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1744 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1745 16, /* rightshift */
1746 1, /* size (0 = byte, 1 = short, 2 = long) */
1747 16, /* bitsize */
1748 FALSE, /* pc_relative */
1749 0, /* bitpos */
1750 complain_overflow_dont, /* complain_on_overflow */
1751 ppc64_elf_unhandled_reloc, /* special_function */
1752 "R_PPC64_GOT_DTPREL16_HA", /* name */
1753 FALSE, /* partial_inplace */
1754 0, /* src_mask */
1755 0xffff, /* dst_mask */
1756 FALSE), /* pcrel_offset */
1757
1758 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1759 offset to the entry relative to the TOC base (r2). */
1760 HOWTO (R_PPC64_GOT_TPREL16_DS,
1761 0, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_signed, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_TPREL16_DS", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xfffc, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Like GOT_TPREL16_DS, but no overflow. */
1775 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1776 0, /* rightshift */
1777 1, /* size (0 = byte, 1 = short, 2 = long) */
1778 16, /* bitsize */
1779 FALSE, /* pc_relative */
1780 0, /* bitpos */
1781 complain_overflow_dont, /* complain_on_overflow */
1782 ppc64_elf_unhandled_reloc, /* special_function */
1783 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1784 FALSE, /* partial_inplace */
1785 0, /* src_mask */
1786 0xfffc, /* dst_mask */
1787 FALSE), /* pcrel_offset */
1788
1789 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1790 HOWTO (R_PPC64_GOT_TPREL16_HI,
1791 16, /* rightshift */
1792 1, /* size (0 = byte, 1 = short, 2 = long) */
1793 16, /* bitsize */
1794 FALSE, /* pc_relative */
1795 0, /* bitpos */
1796 complain_overflow_dont, /* complain_on_overflow */
1797 ppc64_elf_unhandled_reloc, /* special_function */
1798 "R_PPC64_GOT_TPREL16_HI", /* name */
1799 FALSE, /* partial_inplace */
1800 0, /* src_mask */
1801 0xffff, /* dst_mask */
1802 FALSE), /* pcrel_offset */
1803
1804 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1805 HOWTO (R_PPC64_GOT_TPREL16_HA,
1806 16, /* rightshift */
1807 1, /* size (0 = byte, 1 = short, 2 = long) */
1808 16, /* bitsize */
1809 FALSE, /* pc_relative */
1810 0, /* bitpos */
1811 complain_overflow_dont, /* complain_on_overflow */
1812 ppc64_elf_unhandled_reloc, /* special_function */
1813 "R_PPC64_GOT_TPREL16_HA", /* name */
1814 FALSE, /* partial_inplace */
1815 0, /* src_mask */
1816 0xffff, /* dst_mask */
1817 FALSE), /* pcrel_offset */
1818
1819 /* GNU extension to record C++ vtable hierarchy. */
1820 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1821 0, /* rightshift */
1822 0, /* size (0 = byte, 1 = short, 2 = long) */
1823 0, /* bitsize */
1824 FALSE, /* pc_relative */
1825 0, /* bitpos */
1826 complain_overflow_dont, /* complain_on_overflow */
1827 NULL, /* special_function */
1828 "R_PPC64_GNU_VTINHERIT", /* name */
1829 FALSE, /* partial_inplace */
1830 0, /* src_mask */
1831 0, /* dst_mask */
1832 FALSE), /* pcrel_offset */
1833
1834 /* GNU extension to record C++ vtable member usage. */
1835 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1836 0, /* rightshift */
1837 0, /* size (0 = byte, 1 = short, 2 = long) */
1838 0, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_dont, /* complain_on_overflow */
1842 NULL, /* special_function */
1843 "R_PPC64_GNU_VTENTRY", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848 };
1849
1850 \f
1851 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1852 be done. */
1853
1854 static void
1855 ppc_howto_init (void)
1856 {
1857 unsigned int i, type;
1858
1859 for (i = 0;
1860 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1861 i++)
1862 {
1863 type = ppc64_elf_howto_raw[i].type;
1864 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1865 / sizeof (ppc64_elf_howto_table[0])));
1866 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1867 }
1868 }
1869
1870 static reloc_howto_type *
1871 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1872 bfd_reloc_code_real_type code)
1873 {
1874 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1875
1876 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1877 /* Initialize howto table if needed. */
1878 ppc_howto_init ();
1879
1880 switch (code)
1881 {
1882 default:
1883 return NULL;
1884
1885 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1886 break;
1887 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1888 break;
1889 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1890 break;
1891 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1892 break;
1893 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1894 break;
1895 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1896 break;
1897 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1898 break;
1899 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1900 break;
1901 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1902 break;
1903 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1904 break;
1905 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1906 break;
1907 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1908 break;
1909 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1910 break;
1911 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1912 break;
1913 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1914 break;
1915 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1916 break;
1917 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1918 break;
1919 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1920 break;
1921 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1922 break;
1923 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1924 break;
1925 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1926 break;
1927 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1928 break;
1929 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1930 break;
1931 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1932 break;
1933 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1934 break;
1935 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1936 break;
1937 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1938 break;
1939 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1940 break;
1941 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1942 break;
1943 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1944 break;
1945 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1946 break;
1947 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1948 break;
1949 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1950 break;
1951 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1952 break;
1953 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1954 break;
1955 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1956 break;
1957 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1958 break;
1959 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1960 break;
1961 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1962 break;
1963 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1964 break;
1965 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1966 break;
1967 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1968 break;
1969 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1970 break;
1971 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
1972 break;
1973 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
1974 break;
1975 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
1976 break;
1977 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
1978 break;
1979 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
1980 break;
1981 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
1982 break;
1983 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
1984 break;
1985 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
1986 break;
1987 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
1988 break;
1989 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
1990 break;
1991 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
1992 break;
1993 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
1994 break;
1995 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
1996 break;
1997 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
1998 break;
1999 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2000 break;
2001 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2002 break;
2003 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2004 break;
2005 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2006 break;
2007 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2008 break;
2009 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2010 break;
2011 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2012 break;
2013 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2014 break;
2015 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2016 break;
2017 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2018 break;
2019 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2020 break;
2021 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2022 break;
2023 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2024 break;
2025 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2026 break;
2027 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2028 break;
2029 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2030 break;
2031 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2032 break;
2033 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2034 break;
2035 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2036 break;
2037 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2038 break;
2039 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2040 break;
2041 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2042 break;
2043 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2044 break;
2045 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2046 break;
2047 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2048 break;
2049 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2050 break;
2051 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2052 break;
2053 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2054 break;
2055 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2056 break;
2057 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2058 break;
2059 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2060 break;
2061 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2062 break;
2063 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2064 break;
2065 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2066 break;
2067 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2068 break;
2069 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2070 break;
2071 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2072 break;
2073 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2074 break;
2075 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2076 break;
2077 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2078 break;
2079 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2080 break;
2081 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2082 break;
2083 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2084 break;
2085 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2086 break;
2087 }
2088
2089 return ppc64_elf_howto_table[r];
2090 };
2091
2092 /* Set the howto pointer for a PowerPC ELF reloc. */
2093
2094 static void
2095 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2096 Elf_Internal_Rela *dst)
2097 {
2098 unsigned int type;
2099
2100 /* Initialize howto table if needed. */
2101 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2102 ppc_howto_init ();
2103
2104 type = ELF64_R_TYPE (dst->r_info);
2105 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2106 / sizeof (ppc64_elf_howto_table[0])));
2107 cache_ptr->howto = ppc64_elf_howto_table[type];
2108 }
2109
2110 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2111
2112 static bfd_reloc_status_type
2113 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2114 void *data, asection *input_section,
2115 bfd *output_bfd, char **error_message)
2116 {
2117 /* If this is a relocatable link (output_bfd test tells us), just
2118 call the generic function. Any adjustment will be done at final
2119 link time. */
2120 if (output_bfd != NULL)
2121 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2122 input_section, output_bfd, error_message);
2123
2124 /* Adjust the addend for sign extension of the low 16 bits.
2125 We won't actually be using the low 16 bits, so trashing them
2126 doesn't matter. */
2127 reloc_entry->addend += 0x8000;
2128 return bfd_reloc_continue;
2129 }
2130
2131 static bfd_reloc_status_type
2132 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2133 void *data, asection *input_section,
2134 bfd *output_bfd, char **error_message)
2135 {
2136 long insn;
2137 enum elf_ppc64_reloc_type r_type;
2138 bfd_size_type octets;
2139 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2140 bfd_boolean is_power4 = FALSE;
2141
2142 /* If this is a relocatable link (output_bfd test tells us), just
2143 call the generic function. Any adjustment will be done at final
2144 link time. */
2145 if (output_bfd != NULL)
2146 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2147 input_section, output_bfd, error_message);
2148
2149 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2150 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2151 insn &= ~(0x01 << 21);
2152 r_type = reloc_entry->howto->type;
2153 if (r_type == R_PPC64_ADDR14_BRTAKEN
2154 || r_type == R_PPC64_REL14_BRTAKEN)
2155 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2156
2157 if (is_power4)
2158 {
2159 /* Set 'a' bit. This is 0b00010 in BO field for branch
2160 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2161 for branch on CTR insns (BO == 1a00t or 1a01t). */
2162 if ((insn & (0x14 << 21)) == (0x04 << 21))
2163 insn |= 0x02 << 21;
2164 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2165 insn |= 0x08 << 21;
2166 else
2167 return bfd_reloc_continue;
2168 }
2169 else
2170 {
2171 bfd_vma target = 0;
2172 bfd_vma from;
2173
2174 if (!bfd_is_com_section (symbol->section))
2175 target = symbol->value;
2176 target += symbol->section->output_section->vma;
2177 target += symbol->section->output_offset;
2178 target += reloc_entry->addend;
2179
2180 from = (reloc_entry->address
2181 + input_section->output_offset
2182 + input_section->output_section->vma);
2183
2184 /* Invert 'y' bit if not the default. */
2185 if ((bfd_signed_vma) (target - from) < 0)
2186 insn ^= 0x01 << 21;
2187 }
2188 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2189 return bfd_reloc_continue;
2190 }
2191
2192 static bfd_reloc_status_type
2193 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2194 void *data, asection *input_section,
2195 bfd *output_bfd, char **error_message)
2196 {
2197 /* If this is a relocatable link (output_bfd test tells us), just
2198 call the generic function. Any adjustment will be done at final
2199 link time. */
2200 if (output_bfd != NULL)
2201 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2202 input_section, output_bfd, error_message);
2203
2204 /* Subtract the symbol section base address. */
2205 reloc_entry->addend -= symbol->section->output_section->vma;
2206 return bfd_reloc_continue;
2207 }
2208
2209 static bfd_reloc_status_type
2210 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2211 void *data, asection *input_section,
2212 bfd *output_bfd, char **error_message)
2213 {
2214 /* If this is a relocatable link (output_bfd test tells us), just
2215 call the generic function. Any adjustment will be done at final
2216 link time. */
2217 if (output_bfd != NULL)
2218 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2219 input_section, output_bfd, error_message);
2220
2221 /* Subtract the symbol section base address. */
2222 reloc_entry->addend -= symbol->section->output_section->vma;
2223
2224 /* Adjust the addend for sign extension of the low 16 bits. */
2225 reloc_entry->addend += 0x8000;
2226 return bfd_reloc_continue;
2227 }
2228
2229 static bfd_reloc_status_type
2230 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2231 void *data, asection *input_section,
2232 bfd *output_bfd, char **error_message)
2233 {
2234 bfd_vma TOCstart;
2235
2236 /* If this is a relocatable link (output_bfd test tells us), just
2237 call the generic function. Any adjustment will be done at final
2238 link time. */
2239 if (output_bfd != NULL)
2240 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2241 input_section, output_bfd, error_message);
2242
2243 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2244 if (TOCstart == 0)
2245 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2246
2247 /* Subtract the TOC base address. */
2248 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2249 return bfd_reloc_continue;
2250 }
2251
2252 static bfd_reloc_status_type
2253 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2254 void *data, asection *input_section,
2255 bfd *output_bfd, char **error_message)
2256 {
2257 bfd_vma TOCstart;
2258
2259 /* If this is a relocatable link (output_bfd test tells us), just
2260 call the generic function. Any adjustment will be done at final
2261 link time. */
2262 if (output_bfd != NULL)
2263 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message);
2265
2266 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2267 if (TOCstart == 0)
2268 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2269
2270 /* Subtract the TOC base address. */
2271 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2272
2273 /* Adjust the addend for sign extension of the low 16 bits. */
2274 reloc_entry->addend += 0x8000;
2275 return bfd_reloc_continue;
2276 }
2277
2278 static bfd_reloc_status_type
2279 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2280 void *data, asection *input_section,
2281 bfd *output_bfd, char **error_message)
2282 {
2283 bfd_vma TOCstart;
2284 bfd_size_type octets;
2285
2286 /* If this is a relocatable link (output_bfd test tells us), just
2287 call the generic function. Any adjustment will be done at final
2288 link time. */
2289 if (output_bfd != NULL)
2290 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2291 input_section, output_bfd, error_message);
2292
2293 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2294 if (TOCstart == 0)
2295 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2296
2297 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2298 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2299 return bfd_reloc_ok;
2300 }
2301
2302 static bfd_reloc_status_type
2303 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2304 void *data, asection *input_section,
2305 bfd *output_bfd, char **error_message)
2306 {
2307 /* If this is a relocatable link (output_bfd test tells us), just
2308 call the generic function. Any adjustment will be done at final
2309 link time. */
2310 if (output_bfd != NULL)
2311 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2312 input_section, output_bfd, error_message);
2313
2314 if (error_message != NULL)
2315 {
2316 static char buf[60];
2317 sprintf (buf, "generic linker can't handle %s",
2318 reloc_entry->howto->name);
2319 *error_message = buf;
2320 }
2321 return bfd_reloc_dangerous;
2322 }
2323
2324 struct ppc64_elf_obj_tdata
2325 {
2326 struct elf_obj_tdata elf;
2327
2328 /* Shortcuts to dynamic linker sections. */
2329 asection *got;
2330 asection *relgot;
2331
2332 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2333 sections means we potentially need one of these for each input bfd. */
2334 union {
2335 bfd_signed_vma refcount;
2336 bfd_vma offset;
2337 } tlsld_got;
2338 };
2339
2340 #define ppc64_elf_tdata(bfd) \
2341 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2342
2343 #define ppc64_tlsld_got(bfd) \
2344 (&ppc64_elf_tdata (bfd)->tlsld_got)
2345
2346 /* Override the generic function because we store some extras. */
2347
2348 static bfd_boolean
2349 ppc64_elf_mkobject (bfd *abfd)
2350 {
2351 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata);
2352 abfd->tdata.any = bfd_zalloc (abfd, amt);
2353 if (abfd->tdata.any == NULL)
2354 return FALSE;
2355 return TRUE;
2356 }
2357
2358 /* Fix bad default arch selected for a 64 bit input bfd when the
2359 default is 32 bit. */
2360
2361 static bfd_boolean
2362 ppc64_elf_object_p (bfd *abfd)
2363 {
2364 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2365 {
2366 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2367
2368 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2369 {
2370 /* Relies on arch after 32 bit default being 64 bit default. */
2371 abfd->arch_info = abfd->arch_info->next;
2372 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2373 }
2374 }
2375 return TRUE;
2376 }
2377
2378 /* Support for core dump NOTE sections. */
2379
2380 static bfd_boolean
2381 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2382 {
2383 size_t offset, raw_size;
2384
2385 if (note->descsz != 504)
2386 return FALSE;
2387
2388 /* pr_cursig */
2389 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2390
2391 /* pr_pid */
2392 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2393
2394 /* pr_reg */
2395 offset = 112;
2396 raw_size = 384;
2397
2398 /* Make a ".reg/999" section. */
2399 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2400 raw_size, note->descpos + offset);
2401 }
2402
2403 static bfd_boolean
2404 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2405 {
2406 if (note->descsz != 136)
2407 return FALSE;
2408
2409 elf_tdata (abfd)->core_program
2410 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2411 elf_tdata (abfd)->core_command
2412 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2413
2414 return TRUE;
2415 }
2416
2417 /* Merge backend specific data from an object file to the output
2418 object file when linking. */
2419
2420 static bfd_boolean
2421 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2422 {
2423 /* Check if we have the same endianess. */
2424 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2425 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2426 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2427 {
2428 const char *msg;
2429
2430 if (bfd_big_endian (ibfd))
2431 msg = _("%s: compiled for a big endian system "
2432 "and target is little endian");
2433 else
2434 msg = _("%s: compiled for a little endian system "
2435 "and target is big endian");
2436
2437 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
2438
2439 bfd_set_error (bfd_error_wrong_format);
2440 return FALSE;
2441 }
2442
2443 return TRUE;
2444 }
2445
2446 /* Add extra PPC sections. */
2447
2448 static struct bfd_elf_special_section const ppc64_elf_special_sections[]=
2449 {
2450 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2451 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2452 { ".plt", 4, 0, SHT_NOBITS, 0 },
2453 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2454 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2455 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2456 { NULL, 0, 0, 0, 0 }
2457 };
2458
2459 struct _ppc64_elf_section_data
2460 {
2461 struct bfd_elf_section_data elf;
2462
2463 /* An array with one entry for each opd function descriptor. */
2464 union
2465 {
2466 /* Points to the function code section for local opd entries. */
2467 asection **func_sec;
2468 /* After editing .opd, adjust references to opd local syms. */
2469 long *adjust;
2470 } opd;
2471
2472 /* An array for toc sections, indexed by offset/8.
2473 Specifies the relocation symbol index used at a given toc offset. */
2474 unsigned *t_symndx;
2475 };
2476
2477 #define ppc64_elf_section_data(sec) \
2478 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2479
2480 static bfd_boolean
2481 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2482 {
2483 struct _ppc64_elf_section_data *sdata;
2484 bfd_size_type amt = sizeof (*sdata);
2485
2486 sdata = bfd_zalloc (abfd, amt);
2487 if (sdata == NULL)
2488 return FALSE;
2489 sec->used_by_bfd = sdata;
2490
2491 return _bfd_elf_new_section_hook (abfd, sec);
2492 }
2493 \f
2494 /* The following functions are specific to the ELF linker, while
2495 functions above are used generally. Those named ppc64_elf_* are
2496 called by the main ELF linker code. They appear in this file more
2497 or less in the order in which they are called. eg.
2498 ppc64_elf_check_relocs is called early in the link process,
2499 ppc64_elf_finish_dynamic_sections is one of the last functions
2500 called.
2501
2502 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
2503 functions have both a function code symbol and a function descriptor
2504 symbol. A call to foo in a relocatable object file looks like:
2505
2506 . .text
2507 . x:
2508 . bl .foo
2509 . nop
2510
2511 The function definition in another object file might be:
2512
2513 . .section .opd
2514 . foo: .quad .foo
2515 . .quad .TOC.@tocbase
2516 . .quad 0
2517 .
2518 . .text
2519 . .foo: blr
2520
2521 When the linker resolves the call during a static link, the branch
2522 unsurprisingly just goes to .foo and the .opd information is unused.
2523 If the function definition is in a shared library, things are a little
2524 different: The call goes via a plt call stub, the opd information gets
2525 copied to the plt, and the linker patches the nop.
2526
2527 . x:
2528 . bl .foo_stub
2529 . ld 2,40(1)
2530 .
2531 .
2532 . .foo_stub:
2533 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
2534 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
2535 . std 2,40(1) # this is the general idea
2536 . ld 11,0(12)
2537 . ld 2,8(12)
2538 . mtctr 11
2539 . ld 11,16(12)
2540 . bctr
2541 .
2542 . .section .plt
2543 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
2544
2545 The "reloc ()" notation is supposed to indicate that the linker emits
2546 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
2547 copying.
2548
2549 What are the difficulties here? Well, firstly, the relocations
2550 examined by the linker in check_relocs are against the function code
2551 sym .foo, while the dynamic relocation in the plt is emitted against
2552 the function descriptor symbol, foo. Somewhere along the line, we need
2553 to carefully copy dynamic link information from one symbol to the other.
2554 Secondly, the generic part of the elf linker will make .foo a dynamic
2555 symbol as is normal for most other backends. We need foo dynamic
2556 instead, at least for an application final link. However, when
2557 creating a shared library containing foo, we need to have both symbols
2558 dynamic so that references to .foo are satisfied during the early
2559 stages of linking. Otherwise the linker might decide to pull in a
2560 definition from some other object, eg. a static library. */
2561
2562 /* The linker needs to keep track of the number of relocs that it
2563 decides to copy as dynamic relocs in check_relocs for each symbol.
2564 This is so that it can later discard them if they are found to be
2565 unnecessary. We store the information in a field extending the
2566 regular ELF linker hash table. */
2567
2568 struct ppc_dyn_relocs
2569 {
2570 struct ppc_dyn_relocs *next;
2571
2572 /* The input section of the reloc. */
2573 asection *sec;
2574
2575 /* Total number of relocs copied for the input section. */
2576 bfd_size_type count;
2577
2578 /* Number of pc-relative relocs copied for the input section. */
2579 bfd_size_type pc_count;
2580 };
2581
2582 /* Track GOT entries needed for a given symbol. We might need more
2583 than one got entry per symbol. */
2584 struct got_entry
2585 {
2586 struct got_entry *next;
2587
2588 /* The symbol addend that we'll be placing in the GOT. */
2589 bfd_vma addend;
2590
2591 /* Unlike other ELF targets, we use separate GOT entries for the same
2592 symbol referenced from different input files. This is to support
2593 automatic multiple TOC/GOT sections, where the TOC base can vary
2594 from one input file to another.
2595
2596 Point to the BFD owning this GOT entry. */
2597 bfd *owner;
2598
2599 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2600 TLS_TPREL or TLS_DTPREL for tls entries. */
2601 char tls_type;
2602
2603 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2604 union
2605 {
2606 bfd_signed_vma refcount;
2607 bfd_vma offset;
2608 } got;
2609 };
2610
2611 /* The same for PLT. */
2612 struct plt_entry
2613 {
2614 struct plt_entry *next;
2615
2616 bfd_vma addend;
2617
2618 union
2619 {
2620 bfd_signed_vma refcount;
2621 bfd_vma offset;
2622 } plt;
2623 };
2624
2625 /* Of those relocs that might be copied as dynamic relocs, this macro
2626 selects those that must be copied when linking a shared library,
2627 even when the symbol is local. */
2628
2629 #define MUST_BE_DYN_RELOC(RTYPE) \
2630 ((RTYPE) != R_PPC64_REL32 \
2631 && (RTYPE) != R_PPC64_REL64 \
2632 && (RTYPE) != R_PPC64_REL30)
2633
2634 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2635 copying dynamic variables from a shared lib into an app's dynbss
2636 section, and instead use a dynamic relocation to point into the
2637 shared lib. With code that gcc generates, it's vital that this be
2638 enabled; In the PowerPC64 ABI, the address of a function is actually
2639 the address of a function descriptor, which resides in the .opd
2640 section. gcc uses the descriptor directly rather than going via the
2641 GOT as some other ABI's do, which means that initialized function
2642 pointers must reference the descriptor. Thus, a function pointer
2643 initialized to the address of a function in a shared library will
2644 either require a copy reloc, or a dynamic reloc. Using a copy reloc
2645 redefines the function descriptor symbol to point to the copy. This
2646 presents a problem as a plt entry for that function is also
2647 initialized from the function descriptor symbol and the copy reloc
2648 may not be initialized first. */
2649 #define ELIMINATE_COPY_RELOCS 1
2650
2651 /* Section name for stubs is the associated section name plus this
2652 string. */
2653 #define STUB_SUFFIX ".stub"
2654
2655 /* Linker stubs.
2656 ppc_stub_long_branch:
2657 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
2658 destination, but a 24 bit branch in a stub section will reach.
2659 . b dest
2660
2661 ppc_stub_plt_branch:
2662 Similar to the above, but a 24 bit branch in the stub section won't
2663 reach its destination.
2664 . addis %r12,%r2,xxx@toc@ha
2665 . ld %r11,xxx@toc@l(%r12)
2666 . mtctr %r11
2667 . bctr
2668
2669 ppc_stub_plt_call:
2670 Used to call a function in a shared library.
2671 . addis %r12,%r2,xxx@toc@ha
2672 . std %r2,40(%r1)
2673 . ld %r11,xxx+0@toc@l(%r12)
2674 . ld %r2,xxx+8@toc@l(%r12)
2675 . mtctr %r11
2676 . ld %r11,xxx+16@toc@l(%r12)
2677 . bctr
2678
2679 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
2680 code to adjust the value and save r2 to support multiple toc sections.
2681 A ppc_stub_long_branch with an r2 offset looks like:
2682 . std %r2,40(%r1)
2683 . addis %r2,%r2,off@ha
2684 . addi %r2,%r2,off@l
2685 . b dest
2686
2687 A ppc_stub_plt_branch with an r2 offset looks like:
2688 . std %r2,40(%r1)
2689 . addis %r12,%r2,xxx@toc@ha
2690 . ld %r11,xxx@toc@l(%r12)
2691 . addis %r2,%r2,off@ha
2692 . addi %r2,%r2,off@l
2693 . mtctr %r11
2694 . bctr
2695 */
2696
2697 enum ppc_stub_type {
2698 ppc_stub_none,
2699 ppc_stub_long_branch,
2700 ppc_stub_long_branch_r2off,
2701 ppc_stub_plt_branch,
2702 ppc_stub_plt_branch_r2off,
2703 ppc_stub_plt_call
2704 };
2705
2706 struct ppc_stub_hash_entry {
2707
2708 /* Base hash table entry structure. */
2709 struct bfd_hash_entry root;
2710
2711 enum ppc_stub_type stub_type;
2712
2713 /* The stub section. */
2714 asection *stub_sec;
2715
2716 /* Offset within stub_sec of the beginning of this stub. */
2717 bfd_vma stub_offset;
2718
2719 /* Given the symbol's value and its section we can determine its final
2720 value when building the stubs (so the stub knows where to jump. */
2721 bfd_vma target_value;
2722 asection *target_section;
2723
2724 /* The symbol table entry, if any, that this was derived from. */
2725 struct ppc_link_hash_entry *h;
2726
2727 /* And the reloc addend that this was derived from. */
2728 bfd_vma addend;
2729
2730 /* Where this stub is being called from, or, in the case of combined
2731 stub sections, the first input section in the group. */
2732 asection *id_sec;
2733 };
2734
2735 struct ppc_branch_hash_entry {
2736
2737 /* Base hash table entry structure. */
2738 struct bfd_hash_entry root;
2739
2740 /* Offset within .branch_lt. */
2741 unsigned int offset;
2742
2743 /* Generation marker. */
2744 unsigned int iter;
2745 };
2746
2747 struct ppc_link_hash_entry
2748 {
2749 struct elf_link_hash_entry elf;
2750
2751 /* A pointer to the most recently used stub hash entry against this
2752 symbol. */
2753 struct ppc_stub_hash_entry *stub_cache;
2754
2755 /* Track dynamic relocs copied for this symbol. */
2756 struct ppc_dyn_relocs *dyn_relocs;
2757
2758 /* Link between function code and descriptor symbols. */
2759 struct elf_link_hash_entry *oh;
2760
2761 /* Flag function code and descriptor symbols. */
2762 unsigned int is_func:1;
2763 unsigned int is_func_descriptor:1;
2764 unsigned int is_entry:1;
2765
2766 /* Whether global opd sym has been adjusted or not. */
2767 unsigned int adjust_done:1;
2768
2769 /* Contexts in which symbol is used in the GOT (or TOC).
2770 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
2771 corresponding relocs are encountered during check_relocs.
2772 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2773 indicate the corresponding GOT entry type is not needed.
2774 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
2775 a TPREL one. We use a separate flag rather than setting TPREL
2776 just for convenience in distinguishing the two cases. */
2777 #define TLS_GD 1 /* GD reloc. */
2778 #define TLS_LD 2 /* LD reloc. */
2779 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2780 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2781 #define TLS_TLS 16 /* Any TLS reloc. */
2782 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
2783 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
2784 char tls_mask;
2785 };
2786
2787 /* ppc64 ELF linker hash table. */
2788
2789 struct ppc_link_hash_table
2790 {
2791 struct elf_link_hash_table elf;
2792
2793 /* The stub hash table. */
2794 struct bfd_hash_table stub_hash_table;
2795
2796 /* Another hash table for plt_branch stubs. */
2797 struct bfd_hash_table branch_hash_table;
2798
2799 /* Linker stub bfd. */
2800 bfd *stub_bfd;
2801
2802 /* Linker call-backs. */
2803 asection * (*add_stub_section) (const char *, asection *);
2804 void (*layout_sections_again) (void);
2805
2806 /* Array to keep track of which stub sections have been created, and
2807 information on stub grouping. */
2808 struct map_stub {
2809 /* This is the section to which stubs in the group will be attached. */
2810 asection *link_sec;
2811 /* The stub section. */
2812 asection *stub_sec;
2813 /* Along with elf_gp, specifies the TOC pointer used in this group. */
2814 bfd_vma toc_off;
2815 } *stub_group;
2816
2817 /* Support for multiple toc sections. */
2818 unsigned int no_multi_toc;
2819 unsigned int multi_toc_needed;
2820
2821 /* Temp used when calculating TOC pointers. */
2822 bfd_vma toc_curr;
2823
2824 /* Highest input section id. */
2825 int top_id;
2826
2827 /* Highest output section index. */
2828 int top_index;
2829
2830 /* List of input sections for each output section. */
2831 asection **input_list;
2832
2833 /* Short-cuts to get to dynamic linker sections. */
2834 asection *got;
2835 asection *plt;
2836 asection *relplt;
2837 asection *dynbss;
2838 asection *relbss;
2839 asection *glink;
2840 asection *sfpr;
2841 asection *brlt;
2842 asection *relbrlt;
2843
2844 /* Shortcut to .__tls_get_addr. */
2845 struct elf_link_hash_entry *tls_get_addr;
2846
2847 /* Statistics. */
2848 unsigned long stub_count[ppc_stub_plt_call];
2849
2850 /* Set if we should emit symbols for stubs. */
2851 unsigned int emit_stub_syms;
2852
2853 /* Set on error. */
2854 unsigned int stub_error;
2855
2856 /* Flag set when small branches are detected. Used to
2857 select suitable defaults for the stub group size. */
2858 unsigned int has_14bit_branch;
2859
2860 /* Set if we detect a reference undefined weak symbol. */
2861 unsigned int have_undefweak;
2862
2863 /* Incremented every time we size stubs. */
2864 unsigned int stub_iteration;
2865
2866 /* Small local sym to section mapping cache. */
2867 struct sym_sec_cache sym_sec;
2868 };
2869
2870 /* Get the ppc64 ELF linker hash table from a link_info structure. */
2871
2872 #define ppc_hash_table(p) \
2873 ((struct ppc_link_hash_table *) ((p)->hash))
2874
2875 #define ppc_stub_hash_lookup(table, string, create, copy) \
2876 ((struct ppc_stub_hash_entry *) \
2877 bfd_hash_lookup ((table), (string), (create), (copy)))
2878
2879 #define ppc_branch_hash_lookup(table, string, create, copy) \
2880 ((struct ppc_branch_hash_entry *) \
2881 bfd_hash_lookup ((table), (string), (create), (copy)))
2882
2883 /* Create an entry in the stub hash table. */
2884
2885 static struct bfd_hash_entry *
2886 stub_hash_newfunc (struct bfd_hash_entry *entry,
2887 struct bfd_hash_table *table,
2888 const char *string)
2889 {
2890 /* Allocate the structure if it has not already been allocated by a
2891 subclass. */
2892 if (entry == NULL)
2893 {
2894 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
2895 if (entry == NULL)
2896 return entry;
2897 }
2898
2899 /* Call the allocation method of the superclass. */
2900 entry = bfd_hash_newfunc (entry, table, string);
2901 if (entry != NULL)
2902 {
2903 struct ppc_stub_hash_entry *eh;
2904
2905 /* Initialize the local fields. */
2906 eh = (struct ppc_stub_hash_entry *) entry;
2907 eh->stub_type = ppc_stub_none;
2908 eh->stub_sec = NULL;
2909 eh->stub_offset = 0;
2910 eh->target_value = 0;
2911 eh->target_section = NULL;
2912 eh->h = NULL;
2913 eh->id_sec = NULL;
2914 }
2915
2916 return entry;
2917 }
2918
2919 /* Create an entry in the branch hash table. */
2920
2921 static struct bfd_hash_entry *
2922 branch_hash_newfunc (struct bfd_hash_entry *entry,
2923 struct bfd_hash_table *table,
2924 const char *string)
2925 {
2926 /* Allocate the structure if it has not already been allocated by a
2927 subclass. */
2928 if (entry == NULL)
2929 {
2930 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
2931 if (entry == NULL)
2932 return entry;
2933 }
2934
2935 /* Call the allocation method of the superclass. */
2936 entry = bfd_hash_newfunc (entry, table, string);
2937 if (entry != NULL)
2938 {
2939 struct ppc_branch_hash_entry *eh;
2940
2941 /* Initialize the local fields. */
2942 eh = (struct ppc_branch_hash_entry *) entry;
2943 eh->offset = 0;
2944 eh->iter = 0;
2945 }
2946
2947 return entry;
2948 }
2949
2950 /* Create an entry in a ppc64 ELF linker hash table. */
2951
2952 static struct bfd_hash_entry *
2953 link_hash_newfunc (struct bfd_hash_entry *entry,
2954 struct bfd_hash_table *table,
2955 const char *string)
2956 {
2957 /* Allocate the structure if it has not already been allocated by a
2958 subclass. */
2959 if (entry == NULL)
2960 {
2961 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
2962 if (entry == NULL)
2963 return entry;
2964 }
2965
2966 /* Call the allocation method of the superclass. */
2967 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2968 if (entry != NULL)
2969 {
2970 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
2971
2972 eh->stub_cache = NULL;
2973 eh->dyn_relocs = NULL;
2974 eh->oh = NULL;
2975 eh->is_func = 0;
2976 eh->is_func_descriptor = 0;
2977 eh->is_entry = 0;
2978 eh->adjust_done = 0;
2979 eh->tls_mask = 0;
2980 }
2981
2982 return entry;
2983 }
2984
2985 /* Create a ppc64 ELF linker hash table. */
2986
2987 static struct bfd_link_hash_table *
2988 ppc64_elf_link_hash_table_create (bfd *abfd)
2989 {
2990 struct ppc_link_hash_table *htab;
2991 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
2992
2993 htab = bfd_zmalloc (amt);
2994 if (htab == NULL)
2995 return NULL;
2996
2997 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
2998 {
2999 free (htab);
3000 return NULL;
3001 }
3002
3003 /* Init the stub hash table too. */
3004 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
3005 return NULL;
3006
3007 /* And the branch hash table. */
3008 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
3009 return NULL;
3010
3011 /* Initializing two fields of the union is just cosmetic. We really
3012 only care about glist, but when compiled on a 32-bit host the
3013 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3014 debugger inspection of these fields look nicer. */
3015 htab->elf.init_refcount.refcount = 0;
3016 htab->elf.init_refcount.glist = NULL;
3017 htab->elf.init_offset.offset = 0;
3018 htab->elf.init_offset.glist = NULL;
3019
3020 return &htab->elf.root;
3021 }
3022
3023 /* Free the derived linker hash table. */
3024
3025 static void
3026 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3027 {
3028 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3029
3030 bfd_hash_table_free (&ret->stub_hash_table);
3031 bfd_hash_table_free (&ret->branch_hash_table);
3032 _bfd_generic_link_hash_table_free (hash);
3033 }
3034
3035 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3036
3037 void
3038 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3039 {
3040 struct ppc_link_hash_table *htab;
3041
3042 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3043
3044 /* Always hook our dynamic sections into the first bfd, which is the
3045 linker created stub bfd. This ensures that the GOT header is at
3046 the start of the output TOC section. */
3047 htab = ppc_hash_table (info);
3048 htab->stub_bfd = abfd;
3049 htab->elf.dynobj = abfd;
3050 }
3051
3052 /* Build a name for an entry in the stub hash table. */
3053
3054 static char *
3055 ppc_stub_name (const asection *input_section,
3056 const asection *sym_sec,
3057 const struct ppc_link_hash_entry *h,
3058 const Elf_Internal_Rela *rel)
3059 {
3060 char *stub_name;
3061 bfd_size_type len;
3062
3063 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3064 offsets from a sym as a branch target? In fact, we could
3065 probably assume the addend is always zero. */
3066 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3067
3068 if (h)
3069 {
3070 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3071 stub_name = bfd_malloc (len);
3072 if (stub_name != NULL)
3073 {
3074 sprintf (stub_name, "%08x.%s+%x",
3075 input_section->id & 0xffffffff,
3076 h->elf.root.root.string,
3077 (int) rel->r_addend & 0xffffffff);
3078 }
3079 }
3080 else
3081 {
3082 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3083 stub_name = bfd_malloc (len);
3084 if (stub_name != NULL)
3085 {
3086 sprintf (stub_name, "%08x.%x:%x+%x",
3087 input_section->id & 0xffffffff,
3088 sym_sec->id & 0xffffffff,
3089 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3090 (int) rel->r_addend & 0xffffffff);
3091 }
3092 }
3093 return stub_name;
3094 }
3095
3096 /* Look up an entry in the stub hash. Stub entries are cached because
3097 creating the stub name takes a bit of time. */
3098
3099 static struct ppc_stub_hash_entry *
3100 ppc_get_stub_entry (const asection *input_section,
3101 const asection *sym_sec,
3102 struct elf_link_hash_entry *hash,
3103 const Elf_Internal_Rela *rel,
3104 struct ppc_link_hash_table *htab)
3105 {
3106 struct ppc_stub_hash_entry *stub_entry;
3107 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
3108 const asection *id_sec;
3109
3110 /* If this input section is part of a group of sections sharing one
3111 stub section, then use the id of the first section in the group.
3112 Stub names need to include a section id, as there may well be
3113 more than one stub used to reach say, printf, and we need to
3114 distinguish between them. */
3115 id_sec = htab->stub_group[input_section->id].link_sec;
3116
3117 if (h != NULL && h->stub_cache != NULL
3118 && h->stub_cache->h == h
3119 && h->stub_cache->id_sec == id_sec)
3120 {
3121 stub_entry = h->stub_cache;
3122 }
3123 else
3124 {
3125 char *stub_name;
3126
3127 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3128 if (stub_name == NULL)
3129 return NULL;
3130
3131 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3132 stub_name, FALSE, FALSE);
3133 if (h != NULL)
3134 h->stub_cache = stub_entry;
3135
3136 free (stub_name);
3137 }
3138
3139 return stub_entry;
3140 }
3141
3142 /* Add a new stub entry to the stub hash. Not all fields of the new
3143 stub entry are initialised. */
3144
3145 static struct ppc_stub_hash_entry *
3146 ppc_add_stub (const char *stub_name,
3147 asection *section,
3148 struct ppc_link_hash_table *htab)
3149 {
3150 asection *link_sec;
3151 asection *stub_sec;
3152 struct ppc_stub_hash_entry *stub_entry;
3153
3154 link_sec = htab->stub_group[section->id].link_sec;
3155 stub_sec = htab->stub_group[section->id].stub_sec;
3156 if (stub_sec == NULL)
3157 {
3158 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3159 if (stub_sec == NULL)
3160 {
3161 size_t namelen;
3162 bfd_size_type len;
3163 char *s_name;
3164
3165 namelen = strlen (link_sec->name);
3166 len = namelen + sizeof (STUB_SUFFIX);
3167 s_name = bfd_alloc (htab->stub_bfd, len);
3168 if (s_name == NULL)
3169 return NULL;
3170
3171 memcpy (s_name, link_sec->name, namelen);
3172 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3173 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3174 if (stub_sec == NULL)
3175 return NULL;
3176 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3177 }
3178 htab->stub_group[section->id].stub_sec = stub_sec;
3179 }
3180
3181 /* Enter this entry into the linker stub hash table. */
3182 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3183 TRUE, FALSE);
3184 if (stub_entry == NULL)
3185 {
3186 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3187 bfd_archive_filename (section->owner),
3188 stub_name);
3189 return NULL;
3190 }
3191
3192 stub_entry->stub_sec = stub_sec;
3193 stub_entry->stub_offset = 0;
3194 stub_entry->id_sec = link_sec;
3195 return stub_entry;
3196 }
3197
3198 /* Create sections for linker generated code. */
3199
3200 static bfd_boolean
3201 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3202 {
3203 struct ppc_link_hash_table *htab;
3204 flagword flags;
3205
3206 htab = ppc_hash_table (info);
3207
3208 /* Create .sfpr for code to save and restore fp regs. */
3209 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3210 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3211 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
3212 if (htab->sfpr == NULL
3213 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
3214 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3215 return FALSE;
3216
3217 /* Create .glink for lazy dynamic linking support. */
3218 htab->glink = bfd_make_section_anyway (dynobj, ".glink");
3219 if (htab->glink == NULL
3220 || ! bfd_set_section_flags (dynobj, htab->glink, flags)
3221 || ! bfd_set_section_alignment (dynobj, htab->glink, 2))
3222 return FALSE;
3223
3224 /* Create .branch_lt for plt_branch stubs. */
3225 flags = (SEC_ALLOC | SEC_LOAD
3226 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3227 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt");
3228 if (htab->brlt == NULL
3229 || ! bfd_set_section_flags (dynobj, htab->brlt, flags)
3230 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3231 return FALSE;
3232
3233 if (info->shared)
3234 {
3235 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3236 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3237 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
3238 if (!htab->relbrlt
3239 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags)
3240 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3241 return FALSE;
3242 }
3243 return TRUE;
3244 }
3245
3246 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3247 not already done. */
3248
3249 static bfd_boolean
3250 create_got_section (bfd *abfd, struct bfd_link_info *info)
3251 {
3252 asection *got, *relgot;
3253 flagword flags;
3254 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3255
3256 if (!htab->got)
3257 {
3258 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3259 return FALSE;
3260
3261 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3262 if (!htab->got)
3263 abort ();
3264 }
3265
3266 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3267 | SEC_LINKER_CREATED);
3268
3269 got = bfd_make_section (abfd, ".got");
3270 if (!got
3271 || !bfd_set_section_flags (abfd, got, flags)
3272 || !bfd_set_section_alignment (abfd, got, 3))
3273 return FALSE;
3274
3275 relgot = bfd_make_section (abfd, ".rela.got");
3276 if (!relgot
3277 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY)
3278 || ! bfd_set_section_alignment (abfd, relgot, 3))
3279 return FALSE;
3280
3281 ppc64_elf_tdata (abfd)->got = got;
3282 ppc64_elf_tdata (abfd)->relgot = relgot;
3283 return TRUE;
3284 }
3285
3286 /* Create the dynamic sections, and set up shortcuts. */
3287
3288 static bfd_boolean
3289 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3290 {
3291 struct ppc_link_hash_table *htab;
3292
3293 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3294 return FALSE;
3295
3296 htab = ppc_hash_table (info);
3297 if (!htab->got)
3298 htab->got = bfd_get_section_by_name (dynobj, ".got");
3299 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3300 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3301 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3302 if (!info->shared)
3303 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3304
3305 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3306 || (!info->shared && !htab->relbss))
3307 abort ();
3308
3309 return TRUE;
3310 }
3311
3312 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3313
3314 static void
3315 ppc64_elf_copy_indirect_symbol
3316 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
3317 struct elf_link_hash_entry *dir,
3318 struct elf_link_hash_entry *ind)
3319 {
3320 struct ppc_link_hash_entry *edir, *eind;
3321 flagword mask;
3322
3323 edir = (struct ppc_link_hash_entry *) dir;
3324 eind = (struct ppc_link_hash_entry *) ind;
3325
3326 /* Copy over any dynamic relocs we may have on the indirect sym. */
3327 if (eind->dyn_relocs != NULL)
3328 {
3329 if (edir->dyn_relocs != NULL)
3330 {
3331 struct ppc_dyn_relocs **pp;
3332 struct ppc_dyn_relocs *p;
3333
3334 if (eind->elf.root.type == bfd_link_hash_indirect)
3335 abort ();
3336
3337 /* Add reloc counts against the weak sym to the strong sym
3338 list. Merge any entries against the same section. */
3339 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3340 {
3341 struct ppc_dyn_relocs *q;
3342
3343 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3344 if (q->sec == p->sec)
3345 {
3346 q->pc_count += p->pc_count;
3347 q->count += p->count;
3348 *pp = p->next;
3349 break;
3350 }
3351 if (q == NULL)
3352 pp = &p->next;
3353 }
3354 *pp = edir->dyn_relocs;
3355 }
3356
3357 edir->dyn_relocs = eind->dyn_relocs;
3358 eind->dyn_relocs = NULL;
3359 }
3360
3361 edir->is_func |= eind->is_func;
3362 edir->is_func_descriptor |= eind->is_func_descriptor;
3363 edir->is_entry |= eind->is_entry;
3364 edir->tls_mask |= eind->tls_mask;
3365
3366 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR
3367 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF
3368 | ELF_LINK_HASH_NEEDS_PLT);
3369 /* If called to transfer flags for a weakdef during processing
3370 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
3371 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3372 if (ELIMINATE_COPY_RELOCS
3373 && eind->elf.root.type != bfd_link_hash_indirect
3374 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
3375 mask &= ~ELF_LINK_NON_GOT_REF;
3376
3377 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask;
3378
3379 /* If we were called to copy over info for a weak sym, that's all. */
3380 if (eind->elf.root.type != bfd_link_hash_indirect)
3381 return;
3382
3383 /* Copy over got entries that we may have already seen to the
3384 symbol which just became indirect. */
3385 if (eind->elf.got.glist != NULL)
3386 {
3387 if (edir->elf.got.glist != NULL)
3388 {
3389 struct got_entry **entp;
3390 struct got_entry *ent;
3391
3392 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
3393 {
3394 struct got_entry *dent;
3395
3396 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
3397 if (dent->addend == ent->addend
3398 && dent->owner == ent->owner
3399 && dent->tls_type == ent->tls_type)
3400 {
3401 dent->got.refcount += ent->got.refcount;
3402 *entp = ent->next;
3403 break;
3404 }
3405 if (dent == NULL)
3406 entp = &ent->next;
3407 }
3408 *entp = edir->elf.got.glist;
3409 }
3410
3411 edir->elf.got.glist = eind->elf.got.glist;
3412 eind->elf.got.glist = NULL;
3413 }
3414
3415 /* And plt entries. */
3416 if (eind->elf.plt.plist != NULL)
3417 {
3418 if (edir->elf.plt.plist != NULL)
3419 {
3420 struct plt_entry **entp;
3421 struct plt_entry *ent;
3422
3423 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3424 {
3425 struct plt_entry *dent;
3426
3427 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3428 if (dent->addend == ent->addend)
3429 {
3430 dent->plt.refcount += ent->plt.refcount;
3431 *entp = ent->next;
3432 break;
3433 }
3434 if (dent == NULL)
3435 entp = &ent->next;
3436 }
3437 *entp = edir->elf.plt.plist;
3438 }
3439
3440 edir->elf.plt.plist = eind->elf.plt.plist;
3441 eind->elf.plt.plist = NULL;
3442 }
3443
3444 if (edir->elf.dynindx == -1)
3445 {
3446 edir->elf.dynindx = eind->elf.dynindx;
3447 edir->elf.dynstr_index = eind->elf.dynstr_index;
3448 eind->elf.dynindx = -1;
3449 eind->elf.dynstr_index = 0;
3450 }
3451 else
3452 BFD_ASSERT (eind->elf.dynindx == -1);
3453 }
3454
3455 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
3456 symbols undefined on the command-line. */
3457
3458 bfd_boolean
3459 ppc64_elf_mark_entry_syms (struct bfd_link_info *info)
3460 {
3461 struct ppc_link_hash_table *htab;
3462 struct bfd_sym_chain *sym;
3463
3464 htab = ppc_hash_table (info);
3465 for (sym = info->gc_sym_list; sym; sym = sym->next)
3466 {
3467 struct elf_link_hash_entry *h;
3468
3469 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
3470 if (h != NULL)
3471 ((struct ppc_link_hash_entry *) h)->is_entry = 1;
3472 }
3473 return TRUE;
3474 }
3475
3476 static bfd_boolean
3477 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
3478 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
3479 {
3480 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
3481 char *local_got_tls_masks;
3482
3483 if (local_got_ents == NULL)
3484 {
3485 bfd_size_type size = symtab_hdr->sh_info;
3486
3487 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
3488 local_got_ents = bfd_zalloc (abfd, size);
3489 if (local_got_ents == NULL)
3490 return FALSE;
3491 elf_local_got_ents (abfd) = local_got_ents;
3492 }
3493
3494 if ((tls_type & TLS_EXPLICIT) == 0)
3495 {
3496 struct got_entry *ent;
3497
3498 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
3499 if (ent->addend == r_addend
3500 && ent->owner == abfd
3501 && ent->tls_type == tls_type)
3502 break;
3503 if (ent == NULL)
3504 {
3505 bfd_size_type amt = sizeof (*ent);
3506 ent = bfd_alloc (abfd, amt);
3507 if (ent == NULL)
3508 return FALSE;
3509 ent->next = local_got_ents[r_symndx];
3510 ent->addend = r_addend;
3511 ent->owner = abfd;
3512 ent->tls_type = tls_type;
3513 ent->got.refcount = 0;
3514 local_got_ents[r_symndx] = ent;
3515 }
3516 ent->got.refcount += 1;
3517 }
3518
3519 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
3520 local_got_tls_masks[r_symndx] |= tls_type;
3521 return TRUE;
3522 }
3523
3524 static bfd_boolean
3525 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
3526 {
3527 struct plt_entry *ent;
3528
3529 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
3530 if (ent->addend == addend)
3531 break;
3532 if (ent == NULL)
3533 {
3534 bfd_size_type amt = sizeof (*ent);
3535 ent = bfd_alloc (abfd, amt);
3536 if (ent == NULL)
3537 return FALSE;
3538 ent->next = eh->elf.plt.plist;
3539 ent->addend = addend;
3540 ent->plt.refcount = 0;
3541 eh->elf.plt.plist = ent;
3542 }
3543 ent->plt.refcount += 1;
3544 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3545 eh->is_func = 1;
3546 return TRUE;
3547 }
3548
3549 /* Find the function descriptor hash entry from the given function code
3550 hash entry FH. Link the entries via their OH fields. */
3551 static struct ppc_link_hash_entry *
3552 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
3553 {
3554 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh;
3555
3556 if (fdh == NULL)
3557 {
3558 const char *fd_name = fh->elf.root.root.string + 1;
3559
3560 fdh = (struct ppc_link_hash_entry *)
3561 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
3562 if (fdh != NULL)
3563 {
3564 fdh->is_func_descriptor = 1;
3565 fdh->oh = &fh->elf;
3566 fh->is_func = 1;
3567 fh->oh = &fdh->elf;
3568 }
3569 }
3570
3571 return fdh;
3572 }
3573
3574 /* Look through the relocs for a section during the first phase, and
3575 calculate needed space in the global offset table, procedure
3576 linkage table, and dynamic reloc sections. */
3577
3578 static bfd_boolean
3579 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
3580 asection *sec, const Elf_Internal_Rela *relocs)
3581 {
3582 struct ppc_link_hash_table *htab;
3583 Elf_Internal_Shdr *symtab_hdr;
3584 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3585 const Elf_Internal_Rela *rel;
3586 const Elf_Internal_Rela *rel_end;
3587 asection *sreloc;
3588 asection **opd_sym_map;
3589
3590 if (info->relocatable)
3591 return TRUE;
3592
3593 htab = ppc_hash_table (info);
3594 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3595
3596 sym_hashes = elf_sym_hashes (abfd);
3597 sym_hashes_end = (sym_hashes
3598 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
3599 - symtab_hdr->sh_info);
3600
3601 sreloc = NULL;
3602 opd_sym_map = NULL;
3603 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
3604 {
3605 /* Garbage collection needs some extra help with .opd sections.
3606 We don't want to necessarily keep everything referenced by
3607 relocs in .opd, as that would keep all functions. Instead,
3608 if we reference an .opd symbol (a function descriptor), we
3609 want to keep the function code symbol's section. This is
3610 easy for global symbols, but for local syms we need to keep
3611 information about the associated function section. Later, if
3612 edit_opd deletes entries, we'll use this array to adjust
3613 local syms in .opd. */
3614 union opd_info {
3615 asection *func_section;
3616 long entry_adjust;
3617 };
3618 bfd_size_type amt;
3619
3620 amt = sec->_raw_size * sizeof (union opd_info) / 24;
3621 opd_sym_map = bfd_zalloc (abfd, amt);
3622 if (opd_sym_map == NULL)
3623 return FALSE;
3624 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map;
3625 }
3626
3627 if (htab->sfpr == NULL
3628 && !create_linkage_sections (htab->elf.dynobj, info))
3629 return FALSE;
3630
3631 rel_end = relocs + sec->reloc_count;
3632 for (rel = relocs; rel < rel_end; rel++)
3633 {
3634 unsigned long r_symndx;
3635 struct elf_link_hash_entry *h;
3636 enum elf_ppc64_reloc_type r_type;
3637 int tls_type = 0;
3638
3639 r_symndx = ELF64_R_SYM (rel->r_info);
3640 if (r_symndx < symtab_hdr->sh_info)
3641 h = NULL;
3642 else
3643 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3644
3645 r_type = ELF64_R_TYPE (rel->r_info);
3646 switch (r_type)
3647 {
3648 case R_PPC64_GOT_TLSLD16:
3649 case R_PPC64_GOT_TLSLD16_LO:
3650 case R_PPC64_GOT_TLSLD16_HI:
3651 case R_PPC64_GOT_TLSLD16_HA:
3652 ppc64_tlsld_got (abfd)->refcount += 1;
3653 tls_type = TLS_TLS | TLS_LD;
3654 goto dogottls;
3655
3656 case R_PPC64_GOT_TLSGD16:
3657 case R_PPC64_GOT_TLSGD16_LO:
3658 case R_PPC64_GOT_TLSGD16_HI:
3659 case R_PPC64_GOT_TLSGD16_HA:
3660 tls_type = TLS_TLS | TLS_GD;
3661 goto dogottls;
3662
3663 case R_PPC64_GOT_TPREL16_DS:
3664 case R_PPC64_GOT_TPREL16_LO_DS:
3665 case R_PPC64_GOT_TPREL16_HI:
3666 case R_PPC64_GOT_TPREL16_HA:
3667 if (info->shared)
3668 info->flags |= DF_STATIC_TLS;
3669 tls_type = TLS_TLS | TLS_TPREL;
3670 goto dogottls;
3671
3672 case R_PPC64_GOT_DTPREL16_DS:
3673 case R_PPC64_GOT_DTPREL16_LO_DS:
3674 case R_PPC64_GOT_DTPREL16_HI:
3675 case R_PPC64_GOT_DTPREL16_HA:
3676 tls_type = TLS_TLS | TLS_DTPREL;
3677 dogottls:
3678 sec->has_tls_reloc = 1;
3679 /* Fall thru */
3680
3681 case R_PPC64_GOT16:
3682 case R_PPC64_GOT16_DS:
3683 case R_PPC64_GOT16_HA:
3684 case R_PPC64_GOT16_HI:
3685 case R_PPC64_GOT16_LO:
3686 case R_PPC64_GOT16_LO_DS:
3687 /* This symbol requires a global offset table entry. */
3688 sec->has_gp_reloc = 1;
3689 if (ppc64_elf_tdata (abfd)->got == NULL
3690 && !create_got_section (abfd, info))
3691 return FALSE;
3692
3693 if (h != NULL)
3694 {
3695 struct ppc_link_hash_entry *eh;
3696 struct got_entry *ent;
3697
3698 eh = (struct ppc_link_hash_entry *) h;
3699 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
3700 if (ent->addend == rel->r_addend
3701 && ent->owner == abfd
3702 && ent->tls_type == tls_type)
3703 break;
3704 if (ent == NULL)
3705 {
3706 bfd_size_type amt = sizeof (*ent);
3707 ent = bfd_alloc (abfd, amt);
3708 if (ent == NULL)
3709 return FALSE;
3710 ent->next = eh->elf.got.glist;
3711 ent->addend = rel->r_addend;
3712 ent->owner = abfd;
3713 ent->tls_type = tls_type;
3714 ent->got.refcount = 0;
3715 eh->elf.got.glist = ent;
3716 }
3717 ent->got.refcount += 1;
3718 eh->tls_mask |= tls_type;
3719 }
3720 else
3721 /* This is a global offset table entry for a local symbol. */
3722 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3723 rel->r_addend, tls_type))
3724 return FALSE;
3725 break;
3726
3727 case R_PPC64_PLT16_HA:
3728 case R_PPC64_PLT16_HI:
3729 case R_PPC64_PLT16_LO:
3730 case R_PPC64_PLT32:
3731 case R_PPC64_PLT64:
3732 /* This symbol requires a procedure linkage table entry. We
3733 actually build the entry in adjust_dynamic_symbol,
3734 because this might be a case of linking PIC code without
3735 linking in any dynamic objects, in which case we don't
3736 need to generate a procedure linkage table after all. */
3737 if (h == NULL)
3738 {
3739 /* It does not make sense to have a procedure linkage
3740 table entry for a local symbol. */
3741 bfd_set_error (bfd_error_bad_value);
3742 return FALSE;
3743 }
3744 else
3745 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3746 rel->r_addend))
3747 return FALSE;
3748 break;
3749
3750 /* The following relocations don't need to propagate the
3751 relocation if linking a shared object since they are
3752 section relative. */
3753 case R_PPC64_SECTOFF:
3754 case R_PPC64_SECTOFF_LO:
3755 case R_PPC64_SECTOFF_HI:
3756 case R_PPC64_SECTOFF_HA:
3757 case R_PPC64_SECTOFF_DS:
3758 case R_PPC64_SECTOFF_LO_DS:
3759 case R_PPC64_DTPREL16:
3760 case R_PPC64_DTPREL16_LO:
3761 case R_PPC64_DTPREL16_HI:
3762 case R_PPC64_DTPREL16_HA:
3763 case R_PPC64_DTPREL16_DS:
3764 case R_PPC64_DTPREL16_LO_DS:
3765 case R_PPC64_DTPREL16_HIGHER:
3766 case R_PPC64_DTPREL16_HIGHERA:
3767 case R_PPC64_DTPREL16_HIGHEST:
3768 case R_PPC64_DTPREL16_HIGHESTA:
3769 break;
3770
3771 /* Nor do these. */
3772 case R_PPC64_TOC16:
3773 case R_PPC64_TOC16_LO:
3774 case R_PPC64_TOC16_HI:
3775 case R_PPC64_TOC16_HA:
3776 case R_PPC64_TOC16_DS:
3777 case R_PPC64_TOC16_LO_DS:
3778 sec->has_gp_reloc = 1;
3779 break;
3780
3781 /* This relocation describes the C++ object vtable hierarchy.
3782 Reconstruct it for later use during GC. */
3783 case R_PPC64_GNU_VTINHERIT:
3784 if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3785 return FALSE;
3786 break;
3787
3788 /* This relocation describes which C++ vtable entries are actually
3789 used. Record for later use during GC. */
3790 case R_PPC64_GNU_VTENTRY:
3791 if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3792 return FALSE;
3793 break;
3794
3795 case R_PPC64_REL14:
3796 case R_PPC64_REL14_BRTAKEN:
3797 case R_PPC64_REL14_BRNTAKEN:
3798 htab->has_14bit_branch = 1;
3799 /* Fall through. */
3800
3801 case R_PPC64_REL24:
3802 if (h != NULL
3803 && h->root.root.string[0] == '.'
3804 && h->root.root.string[1] != 0)
3805 {
3806 /* We may need a .plt entry if the function this reloc
3807 refers to is in a shared lib. */
3808 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
3809 rel->r_addend))
3810 return FALSE;
3811 if (h == htab->tls_get_addr)
3812 sec->has_tls_reloc = 1;
3813 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15)
3814 == 0)
3815 && (h->root.root.string[15] == 0
3816 || h->root.root.string[15] == '@'))
3817 {
3818 htab->tls_get_addr = h;
3819 sec->has_tls_reloc = 1;
3820 }
3821 }
3822 break;
3823
3824 case R_PPC64_TPREL64:
3825 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
3826 if (info->shared)
3827 info->flags |= DF_STATIC_TLS;
3828 goto dotlstoc;
3829
3830 case R_PPC64_DTPMOD64:
3831 if (rel + 1 < rel_end
3832 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
3833 && rel[1].r_offset == rel->r_offset + 8)
3834 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
3835 else
3836 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
3837 goto dotlstoc;
3838
3839 case R_PPC64_DTPREL64:
3840 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
3841 if (rel != relocs
3842 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
3843 && rel[-1].r_offset == rel->r_offset - 8)
3844 /* This is the second reloc of a dtpmod, dtprel pair.
3845 Don't mark with TLS_DTPREL. */
3846 goto dodyn;
3847
3848 dotlstoc:
3849 sec->has_tls_reloc = 1;
3850 if (h != NULL)
3851 {
3852 struct ppc_link_hash_entry *eh;
3853 eh = (struct ppc_link_hash_entry *) h;
3854 eh->tls_mask |= tls_type;
3855 }
3856 else
3857 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
3858 rel->r_addend, tls_type))
3859 return FALSE;
3860
3861 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3862 {
3863 /* One extra to simplify get_tls_mask. */
3864 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1;
3865 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt);
3866 if (ppc64_elf_section_data (sec)->t_symndx == NULL)
3867 return FALSE;
3868 }
3869 BFD_ASSERT (rel->r_offset % 8 == 0);
3870 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx;
3871
3872 /* Mark the second slot of a GD or LD entry.
3873 -1 to indicate GD and -2 to indicate LD. */
3874 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
3875 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1;
3876 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
3877 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2;
3878 goto dodyn;
3879
3880 case R_PPC64_TPREL16:
3881 case R_PPC64_TPREL16_LO:
3882 case R_PPC64_TPREL16_HI:
3883 case R_PPC64_TPREL16_HA:
3884 case R_PPC64_TPREL16_DS:
3885 case R_PPC64_TPREL16_LO_DS:
3886 case R_PPC64_TPREL16_HIGHER:
3887 case R_PPC64_TPREL16_HIGHERA:
3888 case R_PPC64_TPREL16_HIGHEST:
3889 case R_PPC64_TPREL16_HIGHESTA:
3890 if (info->shared)
3891 {
3892 info->flags |= DF_STATIC_TLS;
3893 goto dodyn;
3894 }
3895 break;
3896
3897 case R_PPC64_ADDR64:
3898 if (opd_sym_map != NULL
3899 && h != NULL
3900 && h->root.root.string[0] == '.'
3901 && h->root.root.string[1] != 0)
3902 get_fdh ((struct ppc_link_hash_entry *) h, htab);
3903
3904 if (opd_sym_map != NULL
3905 && h == NULL
3906 && rel + 1 < rel_end
3907 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
3908 {
3909 asection *s;
3910
3911 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3912 r_symndx);
3913 if (s == NULL)
3914 return FALSE;
3915 else if (s != sec)
3916 opd_sym_map[rel->r_offset / 24] = s;
3917 }
3918 /* Fall through. */
3919
3920 case R_PPC64_REL30:
3921 case R_PPC64_REL32:
3922 case R_PPC64_REL64:
3923 case R_PPC64_ADDR14:
3924 case R_PPC64_ADDR14_BRNTAKEN:
3925 case R_PPC64_ADDR14_BRTAKEN:
3926 case R_PPC64_ADDR16:
3927 case R_PPC64_ADDR16_DS:
3928 case R_PPC64_ADDR16_HA:
3929 case R_PPC64_ADDR16_HI:
3930 case R_PPC64_ADDR16_HIGHER:
3931 case R_PPC64_ADDR16_HIGHERA:
3932 case R_PPC64_ADDR16_HIGHEST:
3933 case R_PPC64_ADDR16_HIGHESTA:
3934 case R_PPC64_ADDR16_LO:
3935 case R_PPC64_ADDR16_LO_DS:
3936 case R_PPC64_ADDR24:
3937 case R_PPC64_ADDR32:
3938 case R_PPC64_UADDR16:
3939 case R_PPC64_UADDR32:
3940 case R_PPC64_UADDR64:
3941 case R_PPC64_TOC:
3942 if (h != NULL && !info->shared)
3943 /* We may need a copy reloc. */
3944 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
3945
3946 /* Don't propagate .opd relocs. */
3947 if (NO_OPD_RELOCS && opd_sym_map != NULL)
3948 break;
3949
3950 /* Don't propagate relocs that the dynamic linker won't relocate. */
3951 if ((sec->flags & SEC_ALLOC) == 0)
3952 break;
3953
3954 /* If we are creating a shared library, and this is a reloc
3955 against a global symbol, or a non PC relative reloc
3956 against a local symbol, then we need to copy the reloc
3957 into the shared library. However, if we are linking with
3958 -Bsymbolic, we do not need to copy a reloc against a
3959 global symbol which is defined in an object we are
3960 including in the link (i.e., DEF_REGULAR is set). At
3961 this point we have not seen all the input files, so it is
3962 possible that DEF_REGULAR is not set now but will be set
3963 later (it is never cleared). In case of a weak definition,
3964 DEF_REGULAR may be cleared later by a strong definition in
3965 a shared library. We account for that possibility below by
3966 storing information in the dyn_relocs field of the hash
3967 table entry. A similar situation occurs when creating
3968 shared libraries and symbol visibility changes render the
3969 symbol local.
3970
3971 If on the other hand, we are creating an executable, we
3972 may need to keep relocations for symbols satisfied by a
3973 dynamic library if we manage to avoid copy relocs for the
3974 symbol. */
3975 dodyn:
3976 if ((info->shared
3977 && (MUST_BE_DYN_RELOC (r_type)
3978 || (h != NULL
3979 && (! info->symbolic
3980 || h->root.type == bfd_link_hash_defweak
3981 || (h->elf_link_hash_flags
3982 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3983 || (ELIMINATE_COPY_RELOCS
3984 && !info->shared
3985 && h != NULL
3986 && (h->root.type == bfd_link_hash_defweak
3987 || (h->elf_link_hash_flags
3988 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
3989 {
3990 struct ppc_dyn_relocs *p;
3991 struct ppc_dyn_relocs **head;
3992
3993 /* We must copy these reloc types into the output file.
3994 Create a reloc section in dynobj and make room for
3995 this reloc. */
3996 if (sreloc == NULL)
3997 {
3998 const char *name;
3999 bfd *dynobj;
4000
4001 name = (bfd_elf_string_from_elf_section
4002 (abfd,
4003 elf_elfheader (abfd)->e_shstrndx,
4004 elf_section_data (sec)->rel_hdr.sh_name));
4005 if (name == NULL)
4006 return FALSE;
4007
4008 if (strncmp (name, ".rela", 5) != 0
4009 || strcmp (bfd_get_section_name (abfd, sec),
4010 name + 5) != 0)
4011 {
4012 (*_bfd_error_handler)
4013 (_("%s: bad relocation section name `%s\'"),
4014 bfd_archive_filename (abfd), name);
4015 bfd_set_error (bfd_error_bad_value);
4016 }
4017
4018 dynobj = htab->elf.dynobj;
4019 sreloc = bfd_get_section_by_name (dynobj, name);
4020 if (sreloc == NULL)
4021 {
4022 flagword flags;
4023
4024 sreloc = bfd_make_section (dynobj, name);
4025 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4026 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4027 if ((sec->flags & SEC_ALLOC) != 0)
4028 flags |= SEC_ALLOC | SEC_LOAD;
4029 if (sreloc == NULL
4030 || ! bfd_set_section_flags (dynobj, sreloc, flags)
4031 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4032 return FALSE;
4033 }
4034 elf_section_data (sec)->sreloc = sreloc;
4035 }
4036
4037 /* If this is a global symbol, we count the number of
4038 relocations we need for this symbol. */
4039 if (h != NULL)
4040 {
4041 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4042 }
4043 else
4044 {
4045 /* Track dynamic relocs needed for local syms too.
4046 We really need local syms available to do this
4047 easily. Oh well. */
4048
4049 asection *s;
4050 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4051 sec, r_symndx);
4052 if (s == NULL)
4053 return FALSE;
4054
4055 head = ((struct ppc_dyn_relocs **)
4056 &elf_section_data (s)->local_dynrel);
4057 }
4058
4059 p = *head;
4060 if (p == NULL || p->sec != sec)
4061 {
4062 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4063 if (p == NULL)
4064 return FALSE;
4065 p->next = *head;
4066 *head = p;
4067 p->sec = sec;
4068 p->count = 0;
4069 p->pc_count = 0;
4070 }
4071
4072 p->count += 1;
4073 if (!MUST_BE_DYN_RELOC (r_type))
4074 p->pc_count += 1;
4075 }
4076 break;
4077
4078 default:
4079 break;
4080 }
4081 }
4082
4083 return TRUE;
4084 }
4085
4086 /* Return the section that should be marked against GC for a given
4087 relocation. */
4088
4089 static asection *
4090 ppc64_elf_gc_mark_hook (asection *sec,
4091 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4092 Elf_Internal_Rela *rel,
4093 struct elf_link_hash_entry *h,
4094 Elf_Internal_Sym *sym)
4095 {
4096 asection *rsec = NULL;
4097
4098 if (h != NULL)
4099 {
4100 enum elf_ppc64_reloc_type r_type;
4101 struct ppc_link_hash_entry *fdh;
4102
4103 r_type = ELF64_R_TYPE (rel->r_info);
4104 switch (r_type)
4105 {
4106 case R_PPC64_GNU_VTINHERIT:
4107 case R_PPC64_GNU_VTENTRY:
4108 break;
4109
4110 default:
4111 switch (h->root.type)
4112 {
4113 case bfd_link_hash_defined:
4114 case bfd_link_hash_defweak:
4115 fdh = (struct ppc_link_hash_entry *) h;
4116
4117 /* Function descriptor syms cause the associated
4118 function code sym section to be marked. */
4119 if (fdh->is_func_descriptor)
4120 rsec = fdh->oh->root.u.def.section;
4121
4122 /* Function entry syms return NULL if they are in .opd
4123 and are not ._start (or others undefined on the ld
4124 command line). Thus we avoid marking all function
4125 sections, as all functions are referenced in .opd. */
4126 else if ((fdh->oh != NULL
4127 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
4128 || ppc64_elf_section_data (sec)->opd.func_sec == NULL)
4129 rsec = h->root.u.def.section;
4130 break;
4131
4132 case bfd_link_hash_common:
4133 rsec = h->root.u.c.p->section;
4134 break;
4135
4136 default:
4137 break;
4138 }
4139 }
4140 }
4141 else
4142 {
4143 asection **opd_sym_section;
4144
4145 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
4146 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec;
4147 if (opd_sym_section != NULL)
4148 rsec = opd_sym_section[sym->st_value / 24];
4149 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL)
4150 rsec = NULL;
4151 }
4152
4153 return rsec;
4154 }
4155
4156 /* Update the .got, .plt. and dynamic reloc reference counts for the
4157 section being removed. */
4158
4159 static bfd_boolean
4160 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
4161 asection *sec, const Elf_Internal_Rela *relocs)
4162 {
4163 struct ppc_link_hash_table *htab;
4164 Elf_Internal_Shdr *symtab_hdr;
4165 struct elf_link_hash_entry **sym_hashes;
4166 struct got_entry **local_got_ents;
4167 const Elf_Internal_Rela *rel, *relend;
4168
4169 elf_section_data (sec)->local_dynrel = NULL;
4170
4171 htab = ppc_hash_table (info);
4172 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4173 sym_hashes = elf_sym_hashes (abfd);
4174 local_got_ents = elf_local_got_ents (abfd);
4175
4176 relend = relocs + sec->reloc_count;
4177 for (rel = relocs; rel < relend; rel++)
4178 {
4179 unsigned long r_symndx;
4180 enum elf_ppc64_reloc_type r_type;
4181 struct elf_link_hash_entry *h = NULL;
4182 char tls_type = 0;
4183
4184 r_symndx = ELF64_R_SYM (rel->r_info);
4185 r_type = ELF64_R_TYPE (rel->r_info);
4186 if (r_symndx >= symtab_hdr->sh_info)
4187 {
4188 struct ppc_link_hash_entry *eh;
4189 struct ppc_dyn_relocs **pp;
4190 struct ppc_dyn_relocs *p;
4191
4192 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4193 eh = (struct ppc_link_hash_entry *) h;
4194
4195 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4196 if (p->sec == sec)
4197 {
4198 /* Everything must go for SEC. */
4199 *pp = p->next;
4200 break;
4201 }
4202 }
4203
4204 switch (r_type)
4205 {
4206 case R_PPC64_GOT_TLSLD16:
4207 case R_PPC64_GOT_TLSLD16_LO:
4208 case R_PPC64_GOT_TLSLD16_HI:
4209 case R_PPC64_GOT_TLSLD16_HA:
4210 ppc64_tlsld_got (abfd)->refcount -= 1;
4211 tls_type = TLS_TLS | TLS_LD;
4212 goto dogot;
4213
4214 case R_PPC64_GOT_TLSGD16:
4215 case R_PPC64_GOT_TLSGD16_LO:
4216 case R_PPC64_GOT_TLSGD16_HI:
4217 case R_PPC64_GOT_TLSGD16_HA:
4218 tls_type = TLS_TLS | TLS_GD;
4219 goto dogot;
4220
4221 case R_PPC64_GOT_TPREL16_DS:
4222 case R_PPC64_GOT_TPREL16_LO_DS:
4223 case R_PPC64_GOT_TPREL16_HI:
4224 case R_PPC64_GOT_TPREL16_HA:
4225 tls_type = TLS_TLS | TLS_TPREL;
4226 goto dogot;
4227
4228 case R_PPC64_GOT_DTPREL16_DS:
4229 case R_PPC64_GOT_DTPREL16_LO_DS:
4230 case R_PPC64_GOT_DTPREL16_HI:
4231 case R_PPC64_GOT_DTPREL16_HA:
4232 tls_type = TLS_TLS | TLS_DTPREL;
4233 goto dogot;
4234
4235 case R_PPC64_GOT16:
4236 case R_PPC64_GOT16_DS:
4237 case R_PPC64_GOT16_HA:
4238 case R_PPC64_GOT16_HI:
4239 case R_PPC64_GOT16_LO:
4240 case R_PPC64_GOT16_LO_DS:
4241 dogot:
4242 {
4243 struct got_entry *ent;
4244
4245 if (h != NULL)
4246 ent = h->got.glist;
4247 else
4248 ent = local_got_ents[r_symndx];
4249
4250 for (; ent != NULL; ent = ent->next)
4251 if (ent->addend == rel->r_addend
4252 && ent->owner == abfd
4253 && ent->tls_type == tls_type)
4254 break;
4255 if (ent == NULL)
4256 abort ();
4257 if (ent->got.refcount > 0)
4258 ent->got.refcount -= 1;
4259 }
4260 break;
4261
4262 case R_PPC64_PLT16_HA:
4263 case R_PPC64_PLT16_HI:
4264 case R_PPC64_PLT16_LO:
4265 case R_PPC64_PLT32:
4266 case R_PPC64_PLT64:
4267 case R_PPC64_REL14:
4268 case R_PPC64_REL14_BRNTAKEN:
4269 case R_PPC64_REL14_BRTAKEN:
4270 case R_PPC64_REL24:
4271 if (h != NULL)
4272 {
4273 struct plt_entry *ent;
4274
4275 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4276 if (ent->addend == rel->r_addend)
4277 break;
4278 if (ent == NULL)
4279 abort ();
4280 if (ent->plt.refcount > 0)
4281 ent->plt.refcount -= 1;
4282 }
4283 break;
4284
4285 default:
4286 break;
4287 }
4288 }
4289 return TRUE;
4290 }
4291
4292 /* Called via elf_link_hash_traverse to transfer dynamic linking
4293 information on function code symbol entries to their corresponding
4294 function descriptor symbol entries. */
4295 static bfd_boolean
4296 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
4297 {
4298 struct bfd_link_info *info;
4299 struct ppc_link_hash_table *htab;
4300 struct plt_entry *ent;
4301 struct ppc_link_hash_entry *fh;
4302 struct ppc_link_hash_entry *fdh;
4303 bfd_boolean force_local;
4304
4305 fh = (struct ppc_link_hash_entry *) h;
4306 if (fh->elf.root.type == bfd_link_hash_indirect)
4307 return TRUE;
4308
4309 if (fh->elf.root.type == bfd_link_hash_warning)
4310 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
4311
4312 info = inf;
4313 htab = ppc_hash_table (info);
4314
4315 /* If this is a function code symbol, transfer dynamic linking
4316 information to the function descriptor symbol. */
4317 if (!fh->is_func)
4318 return TRUE;
4319
4320 if (fh->elf.root.type == bfd_link_hash_undefweak
4321 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
4322 htab->have_undefweak = TRUE;
4323
4324 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
4325 if (ent->plt.refcount > 0)
4326 break;
4327 if (ent == NULL
4328 || fh->elf.root.root.string[0] != '.'
4329 || fh->elf.root.root.string[1] == '\0')
4330 return TRUE;
4331
4332 /* Find the corresponding function descriptor symbol. Create it
4333 as undefined if necessary. */
4334
4335 fdh = get_fdh (fh, htab);
4336 if (fdh != NULL)
4337 while (fdh->elf.root.type == bfd_link_hash_indirect
4338 || fdh->elf.root.type == bfd_link_hash_warning)
4339 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
4340
4341 if (fdh == NULL
4342 && info->shared
4343 && (fh->elf.root.type == bfd_link_hash_undefined
4344 || fh->elf.root.type == bfd_link_hash_undefweak))
4345 {
4346 bfd *abfd;
4347 asymbol *newsym;
4348 struct bfd_link_hash_entry *bh;
4349
4350 abfd = fh->elf.root.u.undef.abfd;
4351 newsym = bfd_make_empty_symbol (abfd);
4352 newsym->name = fh->elf.root.root.string + 1;
4353 newsym->section = bfd_und_section_ptr;
4354 newsym->value = 0;
4355 newsym->flags = BSF_OBJECT;
4356 if (fh->elf.root.type == bfd_link_hash_undefweak)
4357 newsym->flags |= BSF_WEAK;
4358
4359 bh = &fdh->elf.root;
4360 if ( !(_bfd_generic_link_add_one_symbol
4361 (info, abfd, newsym->name, newsym->flags,
4362 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh)))
4363 {
4364 return FALSE;
4365 }
4366 fdh = (struct ppc_link_hash_entry *) bh;
4367 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
4368 fdh->elf.size = 24;
4369 fdh->elf.type = STT_OBJECT;
4370 }
4371
4372 if (fdh != NULL
4373 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
4374 && (info->shared
4375 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4376 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
4377 || (fdh->elf.root.type == bfd_link_hash_undefweak
4378 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
4379 {
4380 if (fdh->elf.dynindx == -1)
4381 if (! bfd_elf64_link_record_dynamic_symbol (info, &fdh->elf))
4382 return FALSE;
4383 fdh->elf.elf_link_hash_flags
4384 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
4385 | ELF_LINK_HASH_REF_DYNAMIC
4386 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
4387 | ELF_LINK_NON_GOT_REF));
4388 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
4389 {
4390 fdh->elf.plt.plist = fh->elf.plt.plist;
4391 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
4392 }
4393 fdh->is_func_descriptor = 1;
4394 fdh->oh = &fh->elf;
4395 fh->oh = &fdh->elf;
4396 }
4397
4398 /* Now that the info is on the function descriptor, clear the
4399 function code sym info. Any function code syms for which we
4400 don't have a definition in a regular file, we force local.
4401 This prevents a shared library from exporting syms that have
4402 been imported from another library. Function code syms that
4403 are really in the library we must leave global to prevent the
4404 linker dragging in a definition from a static library. */
4405 force_local
4406 = (info->shared
4407 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4408 || fdh == NULL
4409 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
4410 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0));
4411 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
4412
4413 return TRUE;
4414 }
4415
4416 #define MIN_SAVE_FPR 14
4417 #define MAX_SAVE_FPR 31
4418
4419 /* Called near the start of bfd_elf_size_dynamic_sections. We use
4420 this hook to a) provide some gcc support functions, and b) transfer
4421 dynamic linking information gathered so far on function code symbol
4422 entries, to their corresponding function descriptor symbol entries. */
4423 static bfd_boolean
4424 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
4425 struct bfd_link_info *info)
4426 {
4427 struct ppc_link_hash_table *htab;
4428 unsigned int lowest_savef = MAX_SAVE_FPR + 2;
4429 unsigned int lowest_restf = MAX_SAVE_FPR + 2;
4430 unsigned int i;
4431 struct elf_link_hash_entry *h;
4432 bfd_byte *p;
4433 char sym[10];
4434
4435 htab = ppc_hash_table (info);
4436
4437 if (htab->sfpr == NULL)
4438 /* We don't have any relocs. */
4439 return TRUE;
4440
4441 /* First provide any missing ._savef* and ._restf* functions. */
4442 memcpy (sym, "._savef14", 10);
4443 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4444 {
4445 sym[7] = i / 10 + '0';
4446 sym[8] = i % 10 + '0';
4447 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4448 if (h != NULL
4449 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4450 {
4451 if (lowest_savef > i)
4452 lowest_savef = i;
4453 h->root.type = bfd_link_hash_defined;
4454 h->root.u.def.section = htab->sfpr;
4455 h->root.u.def.value = (i - lowest_savef) * 4;
4456 h->type = STT_FUNC;
4457 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4458 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4459 }
4460 }
4461
4462 memcpy (sym, "._restf14", 10);
4463 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
4464 {
4465 sym[7] = i / 10 + '0';
4466 sym[8] = i % 10 + '0';
4467 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
4468 if (h != NULL
4469 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4470 {
4471 if (lowest_restf > i)
4472 lowest_restf = i;
4473 h->root.type = bfd_link_hash_defined;
4474 h->root.u.def.section = htab->sfpr;
4475 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4476 + (i - lowest_restf) * 4);
4477 h->type = STT_FUNC;
4478 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
4479 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
4480 }
4481 }
4482
4483 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
4484
4485 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
4486 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
4487
4488 if (htab->sfpr->_raw_size == 0)
4489 {
4490 if (!htab->have_undefweak)
4491 {
4492 _bfd_strip_section_from_output (info, htab->sfpr);
4493 return TRUE;
4494 }
4495
4496 htab->sfpr->_raw_size = 4;
4497 }
4498
4499 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
4500 if (p == NULL)
4501 return FALSE;
4502 htab->sfpr->contents = p;
4503
4504 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
4505 {
4506 unsigned int fpr = i << 21;
4507 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4508 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
4509 p += 4;
4510 }
4511 if (lowest_savef <= MAX_SAVE_FPR)
4512 {
4513 bfd_put_32 (htab->elf.dynobj, BLR, p);
4514 p += 4;
4515 }
4516
4517 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
4518 {
4519 unsigned int fpr = i << 21;
4520 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
4521 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
4522 p += 4;
4523 }
4524 if (lowest_restf <= MAX_SAVE_FPR
4525 || htab->sfpr->_raw_size == 4)
4526 {
4527 bfd_put_32 (htab->elf.dynobj, BLR, p);
4528 }
4529
4530 return TRUE;
4531 }
4532
4533 /* Adjust a symbol defined by a dynamic object and referenced by a
4534 regular object. The current definition is in some section of the
4535 dynamic object, but we're not including those sections. We have to
4536 change the definition to something the rest of the link can
4537 understand. */
4538
4539 static bfd_boolean
4540 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4541 struct elf_link_hash_entry *h)
4542 {
4543 struct ppc_link_hash_table *htab;
4544 asection *s;
4545 unsigned int power_of_two;
4546
4547 htab = ppc_hash_table (info);
4548
4549 /* Deal with function syms. */
4550 if (h->type == STT_FUNC
4551 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4552 {
4553 /* Clear procedure linkage table information for any symbol that
4554 won't need a .plt entry. */
4555 struct plt_entry *ent;
4556 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4557 if (ent->plt.refcount > 0)
4558 break;
4559 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
4560 || ent == NULL
4561 || SYMBOL_CALLS_LOCAL (info, h)
4562 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4563 && h->root.type == bfd_link_hash_undefweak))
4564 {
4565 h->plt.plist = NULL;
4566 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
4567 }
4568 }
4569 else
4570 h->plt.plist = NULL;
4571
4572 /* If this is a weak symbol, and there is a real definition, the
4573 processor independent code will have arranged for us to see the
4574 real definition first, and we can just use the same value. */
4575 if (h->weakdef != NULL)
4576 {
4577 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4578 || h->weakdef->root.type == bfd_link_hash_defweak);
4579 h->root.u.def.section = h->weakdef->root.u.def.section;
4580 h->root.u.def.value = h->weakdef->root.u.def.value;
4581 if (ELIMINATE_COPY_RELOCS)
4582 h->elf_link_hash_flags
4583 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
4584 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
4585 return TRUE;
4586 }
4587
4588 /* If we are creating a shared library, we must presume that the
4589 only references to the symbol are via the global offset table.
4590 For such cases we need not do anything here; the relocations will
4591 be handled correctly by relocate_section. */
4592 if (info->shared)
4593 return TRUE;
4594
4595 /* If there are no references to this symbol that do not use the
4596 GOT, we don't need to generate a copy reloc. */
4597 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4598 return TRUE;
4599
4600 if (ELIMINATE_COPY_RELOCS)
4601 {
4602 struct ppc_link_hash_entry * eh;
4603 struct ppc_dyn_relocs *p;
4604
4605 eh = (struct ppc_link_hash_entry *) h;
4606 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4607 {
4608 s = p->sec->output_section;
4609 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4610 break;
4611 }
4612
4613 /* If we didn't find any dynamic relocs in read-only sections, then
4614 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
4615 if (p == NULL)
4616 {
4617 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
4618 return TRUE;
4619 }
4620 }
4621
4622 if (h->plt.plist != NULL)
4623 {
4624 /* We should never get here, but unfortunately there are versions
4625 of gcc out there that improperly (for this ABI) put initialized
4626 function pointers, vtable refs and suchlike in read-only
4627 sections. Allow them to proceed, but warn that this might
4628 break at runtime. */
4629 (*_bfd_error_handler)
4630 (_("copy reloc against `%s' requires lazy plt linking; "
4631 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
4632 h->root.root.string);
4633 }
4634
4635 /* This is a reference to a symbol defined by a dynamic object which
4636 is not a function. */
4637
4638 /* We must allocate the symbol in our .dynbss section, which will
4639 become part of the .bss section of the executable. There will be
4640 an entry for this symbol in the .dynsym section. The dynamic
4641 object will contain position independent code, so all references
4642 from the dynamic object to this symbol will go through the global
4643 offset table. The dynamic linker will use the .dynsym entry to
4644 determine the address it must put in the global offset table, so
4645 both the dynamic object and the regular object will refer to the
4646 same memory location for the variable. */
4647
4648 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
4649 to copy the initial value out of the dynamic object and into the
4650 runtime process image. We need to remember the offset into the
4651 .rela.bss section we are going to use. */
4652 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4653 {
4654 htab->relbss->_raw_size += sizeof (Elf64_External_Rela);
4655 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4656 }
4657
4658 /* We need to figure out the alignment required for this symbol. I
4659 have no idea how ELF linkers handle this. */
4660 power_of_two = bfd_log2 (h->size);
4661 if (power_of_two > 4)
4662 power_of_two = 4;
4663
4664 /* Apply the required alignment. */
4665 s = htab->dynbss;
4666 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
4667 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4668 {
4669 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4670 return FALSE;
4671 }
4672
4673 /* Define the symbol as being at this point in the section. */
4674 h->root.u.def.section = s;
4675 h->root.u.def.value = s->_raw_size;
4676
4677 /* Increment the section size to make room for the symbol. */
4678 s->_raw_size += h->size;
4679
4680 return TRUE;
4681 }
4682
4683 /* If given a function descriptor symbol, hide both the function code
4684 sym and the descriptor. */
4685 static void
4686 ppc64_elf_hide_symbol (struct bfd_link_info *info,
4687 struct elf_link_hash_entry *h,
4688 bfd_boolean force_local)
4689 {
4690 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
4691
4692 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
4693 {
4694 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
4695
4696 if (fh == NULL)
4697 {
4698 const char *p, *q;
4699 struct ppc_link_hash_table *htab;
4700 char save;
4701
4702 /* We aren't supposed to use alloca in BFD because on
4703 systems which do not have alloca the version in libiberty
4704 calls xmalloc, which might cause the program to crash
4705 when it runs out of memory. This function doesn't have a
4706 return status, so there's no way to gracefully return an
4707 error. So cheat. We know that string[-1] can be safely
4708 dereferenced; It's either a string in an ELF string
4709 table, or allocated in an objalloc structure. */
4710
4711 p = h->root.root.string - 1;
4712 save = *p;
4713 *(char *) p = '.';
4714 htab = ppc_hash_table (info);
4715 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4716 *(char *) p = save;
4717
4718 /* Unfortunately, if it so happens that the string we were
4719 looking for was allocated immediately before this string,
4720 then we overwrote the string terminator. That's the only
4721 reason the lookup should fail. */
4722 if (fh == NULL)
4723 {
4724 q = h->root.root.string + strlen (h->root.root.string);
4725 while (q >= h->root.root.string && *q == *p)
4726 --q, --p;
4727 if (q < h->root.root.string && *p == '.')
4728 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
4729 }
4730 if (fh != NULL)
4731 {
4732 ((struct ppc_link_hash_entry *) h)->oh = fh;
4733 ((struct ppc_link_hash_entry *) fh)->oh = h;
4734 }
4735 }
4736 if (fh != NULL)
4737 _bfd_elf_link_hash_hide_symbol (info, fh, force_local);
4738 }
4739 }
4740
4741 static bfd_boolean
4742 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp,
4743 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp,
4744 unsigned long r_symndx, bfd *ibfd)
4745 {
4746 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4747
4748 if (r_symndx >= symtab_hdr->sh_info)
4749 {
4750 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4751 struct elf_link_hash_entry *h;
4752
4753 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4754 while (h->root.type == bfd_link_hash_indirect
4755 || h->root.type == bfd_link_hash_warning)
4756 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4757
4758 if (hp != NULL)
4759 *hp = h;
4760
4761 if (symp != NULL)
4762 *symp = NULL;
4763
4764 if (symsecp != NULL)
4765 {
4766 asection *symsec = NULL;
4767 if (h->root.type == bfd_link_hash_defined
4768 || h->root.type == bfd_link_hash_defweak)
4769 symsec = h->root.u.def.section;
4770 *symsecp = symsec;
4771 }
4772
4773 if (tls_maskp != NULL)
4774 {
4775 struct ppc_link_hash_entry *eh;
4776
4777 eh = (struct ppc_link_hash_entry *) h;
4778 *tls_maskp = &eh->tls_mask;
4779 }
4780 }
4781 else
4782 {
4783 Elf_Internal_Sym *sym;
4784 Elf_Internal_Sym *locsyms = *locsymsp;
4785
4786 if (locsyms == NULL)
4787 {
4788 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4789 if (locsyms == NULL)
4790 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4791 symtab_hdr->sh_info,
4792 0, NULL, NULL, NULL);
4793 if (locsyms == NULL)
4794 return FALSE;
4795 *locsymsp = locsyms;
4796 }
4797 sym = locsyms + r_symndx;
4798
4799 if (hp != NULL)
4800 *hp = NULL;
4801
4802 if (symp != NULL)
4803 *symp = sym;
4804
4805 if (symsecp != NULL)
4806 {
4807 asection *symsec = NULL;
4808 if ((sym->st_shndx != SHN_UNDEF
4809 && sym->st_shndx < SHN_LORESERVE)
4810 || sym->st_shndx > SHN_HIRESERVE)
4811 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
4812 *symsecp = symsec;
4813 }
4814
4815 if (tls_maskp != NULL)
4816 {
4817 struct got_entry **lgot_ents;
4818 char *tls_mask;
4819
4820 tls_mask = NULL;
4821 lgot_ents = elf_local_got_ents (ibfd);
4822 if (lgot_ents != NULL)
4823 {
4824 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
4825 tls_mask = &lgot_masks[r_symndx];
4826 }
4827 *tls_maskp = tls_mask;
4828 }
4829 }
4830 return TRUE;
4831 }
4832
4833 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
4834 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
4835 type suitable for optimization, and 1 otherwise. */
4836
4837 static int
4838 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
4839 Elf_Internal_Sym **locsymsp,
4840 const Elf_Internal_Rela *rel, bfd *ibfd)
4841 {
4842 unsigned long r_symndx;
4843 int next_r;
4844 struct elf_link_hash_entry *h;
4845 Elf_Internal_Sym *sym;
4846 asection *sec;
4847 bfd_vma off;
4848
4849 r_symndx = ELF64_R_SYM (rel->r_info);
4850 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4851 return 0;
4852
4853 if ((*tls_maskp != NULL && **tls_maskp != 0)
4854 || sec == NULL
4855 || ppc64_elf_section_data (sec)->t_symndx == NULL)
4856 return 1;
4857
4858 /* Look inside a TOC section too. */
4859 if (h != NULL)
4860 {
4861 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4862 off = h->root.u.def.value;
4863 }
4864 else
4865 off = sym->st_value;
4866 off += rel->r_addend;
4867 BFD_ASSERT (off % 8 == 0);
4868 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8];
4869 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1];
4870 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
4871 return 0;
4872 if (toc_symndx != NULL)
4873 *toc_symndx = r_symndx;
4874 if ((h == NULL
4875 || ((h->root.type == bfd_link_hash_defined
4876 || h->root.type == bfd_link_hash_defweak)
4877 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
4878 && (next_r == -1 || next_r == -2))
4879 return 1 - next_r;
4880 return 1;
4881 }
4882
4883 /* Adjust all global syms defined in opd sections. In gcc generated
4884 code these will already have been done, but I suppose we have to
4885 cater for all sorts of hand written assembly. */
4886
4887 static bfd_boolean
4888 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
4889 {
4890 struct ppc_link_hash_entry *eh;
4891 asection *sym_sec;
4892 long *opd_adjust;
4893
4894 if (h->root.type == bfd_link_hash_indirect)
4895 return TRUE;
4896
4897 if (h->root.type == bfd_link_hash_warning)
4898 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4899
4900 if (h->root.type != bfd_link_hash_defined
4901 && h->root.type != bfd_link_hash_defweak)
4902 return TRUE;
4903
4904 eh = (struct ppc_link_hash_entry *) h;
4905 if (eh->adjust_done)
4906 return TRUE;
4907
4908 sym_sec = eh->elf.root.u.def.section;
4909 if (sym_sec != NULL
4910 && elf_section_data (sym_sec) != NULL
4911 && (opd_adjust = ppc64_elf_section_data (sym_sec)->opd.adjust) != NULL)
4912 {
4913 eh->elf.root.u.def.value += opd_adjust[eh->elf.root.u.def.value / 24];
4914 eh->adjust_done = 1;
4915 }
4916 return TRUE;
4917 }
4918
4919 /* Remove unused Official Procedure Descriptor entries. Currently we
4920 only remove those associated with functions in discarded link-once
4921 sections, or weakly defined functions that have been overridden. It
4922 would be possible to remove many more entries for statically linked
4923 applications. */
4924
4925 bfd_boolean
4926 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info)
4927 {
4928 bfd *ibfd;
4929 bfd_boolean some_edited = FALSE;
4930
4931 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4932 {
4933 asection *sec;
4934 Elf_Internal_Rela *relstart, *rel, *relend;
4935 Elf_Internal_Shdr *symtab_hdr;
4936 Elf_Internal_Sym *local_syms;
4937 struct elf_link_hash_entry **sym_hashes;
4938 bfd_vma offset;
4939 bfd_size_type amt;
4940 long *adjust;
4941 bfd_boolean need_edit;
4942
4943 sec = bfd_get_section_by_name (ibfd, ".opd");
4944 if (sec == NULL)
4945 continue;
4946
4947 amt = sec->_raw_size * sizeof (long) / 24;
4948 adjust = ppc64_elf_section_data (sec)->opd.adjust;
4949 if (adjust == NULL)
4950 {
4951 /* Must be a ld -r link. ie. check_relocs hasn't been
4952 called. */
4953 adjust = bfd_zalloc (obfd, amt);
4954 ppc64_elf_section_data (sec)->opd.adjust = adjust;
4955 }
4956 memset (adjust, 0, amt);
4957
4958 if (sec->output_section == bfd_abs_section_ptr)
4959 continue;
4960
4961 /* Look through the section relocs. */
4962 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
4963 continue;
4964
4965 local_syms = NULL;
4966 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4967 sym_hashes = elf_sym_hashes (ibfd);
4968
4969 /* Read the relocations. */
4970 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4971 info->keep_memory);
4972 if (relstart == NULL)
4973 return FALSE;
4974
4975 /* First run through the relocs to check they are sane, and to
4976 determine whether we need to edit this opd section. */
4977 need_edit = FALSE;
4978 offset = 0;
4979 relend = relstart + sec->reloc_count;
4980 for (rel = relstart; rel < relend; )
4981 {
4982 enum elf_ppc64_reloc_type r_type;
4983 unsigned long r_symndx;
4984 asection *sym_sec;
4985 struct elf_link_hash_entry *h;
4986 Elf_Internal_Sym *sym;
4987
4988 /* .opd contains a regular array of 24 byte entries. We're
4989 only interested in the reloc pointing to a function entry
4990 point. */
4991 if (rel->r_offset != offset
4992 || rel + 1 >= relend
4993 || (rel + 1)->r_offset != offset + 8)
4994 {
4995 /* If someone messes with .opd alignment then after a
4996 "ld -r" we might have padding in the middle of .opd.
4997 Also, there's nothing to prevent someone putting
4998 something silly in .opd with the assembler. No .opd
4999 optimization for them! */
5000 (*_bfd_error_handler)
5001 (_("%s: .opd is not a regular array of opd entries"),
5002 bfd_archive_filename (ibfd));
5003 need_edit = FALSE;
5004 break;
5005 }
5006
5007 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
5008 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
5009 {
5010 (*_bfd_error_handler)
5011 (_("%s: unexpected reloc type %u in .opd section"),
5012 bfd_archive_filename (ibfd), r_type);
5013 need_edit = FALSE;
5014 break;
5015 }
5016
5017 r_symndx = ELF64_R_SYM (rel->r_info);
5018 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5019 r_symndx, ibfd))
5020 goto error_ret;
5021
5022 if (sym_sec == NULL || sym_sec->owner == NULL)
5023 {
5024 const char *sym_name;
5025 if (h != NULL)
5026 sym_name = h->root.root.string;
5027 else
5028 sym_name = bfd_elf_local_sym_name (ibfd, sym);
5029
5030 (*_bfd_error_handler)
5031 (_("%s: undefined sym `%s' in .opd section"),
5032 bfd_archive_filename (ibfd),
5033 sym_name);
5034 need_edit = FALSE;
5035 break;
5036 }
5037
5038 /* opd entries are always for functions defined in the
5039 current input bfd. If the symbol isn't defined in the
5040 input bfd, then we won't be using the function in this
5041 bfd; It must be defined in a linkonce section in another
5042 bfd, or is weak. It's also possible that we are
5043 discarding the function due to a linker script /DISCARD/,
5044 which we test for via the output_section. */
5045 if (sym_sec->owner != ibfd
5046 || sym_sec->output_section == bfd_abs_section_ptr)
5047 need_edit = TRUE;
5048
5049 offset += 24;
5050 rel += 2;
5051 /* Allow for the possibility of a reloc on the third word. */
5052 if (rel < relend
5053 && rel->r_offset == offset - 8)
5054 rel += 1;
5055 }
5056
5057 if (need_edit)
5058 {
5059 Elf_Internal_Rela *write_rel;
5060 bfd_byte *rptr, *wptr;
5061 bfd_boolean skip;
5062
5063 /* This seems a waste of time as input .opd sections are all
5064 zeros as generated by gcc, but I suppose there's no reason
5065 this will always be so. We might start putting something in
5066 the third word of .opd entries. */
5067 if ((sec->flags & SEC_IN_MEMORY) == 0)
5068 {
5069 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
5070 if (loc == NULL
5071 || !bfd_get_section_contents (ibfd, sec, loc, 0,
5072 sec->_raw_size))
5073 {
5074 error_ret:
5075 if (local_syms != NULL
5076 && symtab_hdr->contents != (unsigned char *) local_syms)
5077 free (local_syms);
5078 if (elf_section_data (sec)->relocs != relstart)
5079 free (relstart);
5080 return FALSE;
5081 }
5082 sec->contents = loc;
5083 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
5084 }
5085
5086 elf_section_data (sec)->relocs = relstart;
5087
5088 wptr = sec->contents;
5089 rptr = sec->contents;
5090 write_rel = relstart;
5091 skip = FALSE;
5092 offset = 0;
5093 for (rel = relstart; rel < relend; rel++)
5094 {
5095 unsigned long r_symndx;
5096 asection *sym_sec;
5097 struct elf_link_hash_entry *h;
5098 Elf_Internal_Sym *sym;
5099
5100 r_symndx = ELF64_R_SYM (rel->r_info);
5101 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
5102 r_symndx, ibfd))
5103 goto error_ret;
5104
5105 if (rel->r_offset == offset)
5106 {
5107 struct ppc_link_hash_entry *fdh = NULL;
5108 if (h != NULL)
5109 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
5110 ppc_hash_table (info));
5111
5112 skip = (sym_sec->owner != ibfd
5113 || sym_sec->output_section == bfd_abs_section_ptr);
5114 if (skip)
5115 {
5116 if (h != NULL && sym_sec->owner == ibfd)
5117 {
5118 /* Arrange for the function descriptor sym
5119 to be dropped. */
5120 fdh->elf.root.u.def.value = 0;
5121 fdh->elf.root.u.def.section = sym_sec;
5122 }
5123 }
5124 else
5125 {
5126 /* We'll be keeping this opd entry. */
5127
5128 if (h != NULL)
5129 {
5130 /* Redefine the function descriptor symbol to
5131 this location in the opd section. It is
5132 necessary to update the value here rather
5133 than using an array of adjustments as we do
5134 for local symbols, because various places
5135 in the generic ELF code use the value
5136 stored in u.def.value. */
5137 fdh->elf.root.u.def.value = wptr - sec->contents;
5138 fdh->adjust_done = 1;
5139 }
5140
5141 /* Local syms are a bit tricky. We could
5142 tweak them as they can be cached, but
5143 we'd need to look through the local syms
5144 for the function descriptor sym which we
5145 don't have at the moment. So keep an
5146 array of adjustments. */
5147 adjust[rel->r_offset / 24] = wptr - rptr;
5148
5149 if (wptr != rptr)
5150 memcpy (wptr, rptr, 24);
5151 wptr += 24;
5152 }
5153 rptr += 24;
5154 offset += 24;
5155 }
5156
5157 if (skip)
5158 {
5159 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info)));
5160 if (info->shared)
5161 {
5162 /* We won't be needing dynamic relocs here. */
5163 struct ppc_dyn_relocs **pp;
5164 struct ppc_dyn_relocs *p;
5165
5166 if (h != NULL)
5167 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5168 else if (sym_sec != NULL)
5169 pp = ((struct ppc_dyn_relocs **)
5170 &elf_section_data (sym_sec)->local_dynrel);
5171 else
5172 pp = ((struct ppc_dyn_relocs **)
5173 &elf_section_data (sec)->local_dynrel);
5174 while ((p = *pp) != NULL)
5175 {
5176 if (p->sec == sec)
5177 {
5178 p->count -= 1;
5179 if (p->count == 0)
5180 *pp = p->next;
5181 break;
5182 }
5183 pp = &p->next;
5184 }
5185 }
5186 }
5187 else
5188 {
5189 /* We need to adjust any reloc offsets to point to the
5190 new opd entries. While we're at it, we may as well
5191 remove redundant relocs. */
5192 rel->r_offset += wptr - rptr;
5193 if (write_rel != rel)
5194 memcpy (write_rel, rel, sizeof (*rel));
5195 ++write_rel;
5196 }
5197 }
5198
5199 sec->_cooked_size = wptr - sec->contents;
5200 sec->reloc_count = write_rel - relstart;
5201 /* Fudge the size too, as this is used later in
5202 elf_bfd_final_link if we are emitting relocs. */
5203 elf_section_data (sec)->rel_hdr.sh_size
5204 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
5205 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
5206 some_edited = TRUE;
5207 }
5208 else if (elf_section_data (sec)->relocs != relstart)
5209 free (relstart);
5210
5211 if (local_syms != NULL
5212 && symtab_hdr->contents != (unsigned char *) local_syms)
5213 {
5214 if (!info->keep_memory)
5215 free (local_syms);
5216 else
5217 symtab_hdr->contents = (unsigned char *) local_syms;
5218 }
5219 }
5220
5221 if (some_edited)
5222 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
5223
5224 return TRUE;
5225 }
5226
5227 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
5228
5229 asection *
5230 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5231 {
5232 struct ppc_link_hash_table *htab;
5233
5234 htab = ppc_hash_table (info);
5235 if (htab->tls_get_addr != NULL)
5236 {
5237 struct elf_link_hash_entry *h = htab->tls_get_addr;
5238
5239 while (h->root.type == bfd_link_hash_indirect
5240 || h->root.type == bfd_link_hash_warning)
5241 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5242
5243 htab->tls_get_addr = h;
5244 }
5245
5246 return _bfd_elf_tls_setup (obfd, info);
5247 }
5248
5249 /* Run through all the TLS relocs looking for optimization
5250 opportunities. The linker has been hacked (see ppc64elf.em) to do
5251 a preliminary section layout so that we know the TLS segment
5252 offsets. We can't optimize earlier because some optimizations need
5253 to know the tp offset, and we need to optimize before allocating
5254 dynamic relocations. */
5255
5256 bfd_boolean
5257 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
5258 {
5259 bfd *ibfd;
5260 asection *sec;
5261 struct ppc_link_hash_table *htab;
5262
5263 if (info->relocatable || info->shared)
5264 return TRUE;
5265
5266 htab = ppc_hash_table (info);
5267 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5268 {
5269 Elf_Internal_Sym *locsyms = NULL;
5270
5271 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5272 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5273 {
5274 Elf_Internal_Rela *relstart, *rel, *relend;
5275 int expecting_tls_get_addr;
5276
5277 /* Read the relocations. */
5278 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5279 info->keep_memory);
5280 if (relstart == NULL)
5281 return FALSE;
5282
5283 expecting_tls_get_addr = 0;
5284 relend = relstart + sec->reloc_count;
5285 for (rel = relstart; rel < relend; rel++)
5286 {
5287 enum elf_ppc64_reloc_type r_type;
5288 unsigned long r_symndx;
5289 struct elf_link_hash_entry *h;
5290 Elf_Internal_Sym *sym;
5291 asection *sym_sec;
5292 char *tls_mask;
5293 char tls_set, tls_clear, tls_type = 0;
5294 bfd_vma value;
5295 bfd_boolean ok_tprel, is_local;
5296
5297 r_symndx = ELF64_R_SYM (rel->r_info);
5298 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
5299 r_symndx, ibfd))
5300 {
5301 err_free_rel:
5302 if (elf_section_data (sec)->relocs != relstart)
5303 free (relstart);
5304 if (locsyms != NULL
5305 && (elf_tdata (ibfd)->symtab_hdr.contents
5306 != (unsigned char *) locsyms))
5307 free (locsyms);
5308 return FALSE;
5309 }
5310
5311 if (h != NULL)
5312 {
5313 if (h->root.type != bfd_link_hash_defined
5314 && h->root.type != bfd_link_hash_defweak)
5315 continue;
5316 value = h->root.u.def.value;
5317 }
5318 else
5319 {
5320 value = sym->st_value;
5321
5322 if (elf_section_data (sym_sec) != NULL)
5323 {
5324 long *adjust;
5325 adjust = ppc64_elf_section_data (sym_sec)->opd.adjust;
5326 if (adjust != NULL)
5327 value += adjust[value / 24];
5328 }
5329 }
5330
5331 ok_tprel = FALSE;
5332 is_local = FALSE;
5333 if (h == NULL
5334 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5335 {
5336 is_local = TRUE;
5337 value += sym_sec->output_offset;
5338 value += sym_sec->output_section->vma;
5339 value -= htab->elf.tls_sec->vma;
5340 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
5341 < (bfd_vma) 1 << 32);
5342 }
5343
5344 r_type = ELF64_R_TYPE (rel->r_info);
5345 switch (r_type)
5346 {
5347 case R_PPC64_GOT_TLSLD16:
5348 case R_PPC64_GOT_TLSLD16_LO:
5349 case R_PPC64_GOT_TLSLD16_HI:
5350 case R_PPC64_GOT_TLSLD16_HA:
5351 /* These relocs should never be against a symbol
5352 defined in a shared lib. Leave them alone if
5353 that turns out to be the case. */
5354 ppc64_tlsld_got (ibfd)->refcount -= 1;
5355 if (!is_local)
5356 continue;
5357
5358 /* LD -> LE */
5359 tls_set = 0;
5360 tls_clear = TLS_LD;
5361 tls_type = TLS_TLS | TLS_LD;
5362 expecting_tls_get_addr = 1;
5363 break;
5364
5365 case R_PPC64_GOT_TLSGD16:
5366 case R_PPC64_GOT_TLSGD16_LO:
5367 case R_PPC64_GOT_TLSGD16_HI:
5368 case R_PPC64_GOT_TLSGD16_HA:
5369 if (ok_tprel)
5370 /* GD -> LE */
5371 tls_set = 0;
5372 else
5373 /* GD -> IE */
5374 tls_set = TLS_TLS | TLS_TPRELGD;
5375 tls_clear = TLS_GD;
5376 tls_type = TLS_TLS | TLS_GD;
5377 expecting_tls_get_addr = 1;
5378 break;
5379
5380 case R_PPC64_GOT_TPREL16_DS:
5381 case R_PPC64_GOT_TPREL16_LO_DS:
5382 case R_PPC64_GOT_TPREL16_HI:
5383 case R_PPC64_GOT_TPREL16_HA:
5384 expecting_tls_get_addr = 0;
5385 if (ok_tprel)
5386 {
5387 /* IE -> LE */
5388 tls_set = 0;
5389 tls_clear = TLS_TPREL;
5390 tls_type = TLS_TLS | TLS_TPREL;
5391 break;
5392 }
5393 else
5394 continue;
5395
5396 case R_PPC64_REL14:
5397 case R_PPC64_REL14_BRTAKEN:
5398 case R_PPC64_REL14_BRNTAKEN:
5399 case R_PPC64_REL24:
5400 if (h != NULL
5401 && h == htab->tls_get_addr)
5402 {
5403 if (!expecting_tls_get_addr
5404 && rel != relstart
5405 && ((ELF64_R_TYPE (rel[-1].r_info)
5406 == R_PPC64_TOC16)
5407 || (ELF64_R_TYPE (rel[-1].r_info)
5408 == R_PPC64_TOC16_LO)))
5409 {
5410 /* Check for toc tls entries. */
5411 char *toc_tls;
5412 int retval;
5413
5414 retval = get_tls_mask (&toc_tls, NULL, &locsyms,
5415 rel - 1, ibfd);
5416 if (retval == 0)
5417 goto err_free_rel;
5418 if (toc_tls != NULL)
5419 expecting_tls_get_addr = retval > 1;
5420 }
5421
5422 if (expecting_tls_get_addr)
5423 {
5424 struct plt_entry *ent;
5425 for (ent = h->plt.plist; ent; ent = ent->next)
5426 if (ent->addend == 0)
5427 {
5428 if (ent->plt.refcount > 0)
5429 ent->plt.refcount -= 1;
5430 break;
5431 }
5432 }
5433 }
5434 expecting_tls_get_addr = 0;
5435 continue;
5436
5437 case R_PPC64_TPREL64:
5438 expecting_tls_get_addr = 0;
5439 if (ok_tprel)
5440 {
5441 /* IE -> LE */
5442 tls_set = TLS_EXPLICIT;
5443 tls_clear = TLS_TPREL;
5444 break;
5445 }
5446 else
5447 continue;
5448
5449 case R_PPC64_DTPMOD64:
5450 expecting_tls_get_addr = 0;
5451 if (rel + 1 < relend
5452 && (rel[1].r_info
5453 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
5454 && rel[1].r_offset == rel->r_offset + 8)
5455 {
5456 if (ok_tprel)
5457 /* GD -> LE */
5458 tls_set = TLS_EXPLICIT | TLS_GD;
5459 else
5460 /* GD -> IE */
5461 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
5462 tls_clear = TLS_GD;
5463 }
5464 else
5465 {
5466 if (!is_local)
5467 continue;
5468
5469 /* LD -> LE */
5470 tls_set = TLS_EXPLICIT;
5471 tls_clear = TLS_LD;
5472 }
5473 break;
5474
5475 default:
5476 expecting_tls_get_addr = 0;
5477 continue;
5478 }
5479
5480 if ((tls_set & TLS_EXPLICIT) == 0)
5481 {
5482 struct got_entry *ent;
5483
5484 /* Adjust got entry for this reloc. */
5485 if (h != NULL)
5486 ent = h->got.glist;
5487 else
5488 ent = elf_local_got_ents (ibfd)[r_symndx];
5489
5490 for (; ent != NULL; ent = ent->next)
5491 if (ent->addend == rel->r_addend
5492 && ent->owner == ibfd
5493 && ent->tls_type == tls_type)
5494 break;
5495 if (ent == NULL)
5496 abort ();
5497
5498 if (tls_set == 0)
5499 {
5500 /* We managed to get rid of a got entry. */
5501 if (ent->got.refcount > 0)
5502 ent->got.refcount -= 1;
5503 }
5504 }
5505 else if (h != NULL)
5506 {
5507 struct ppc_link_hash_entry * eh;
5508 struct ppc_dyn_relocs **pp;
5509 struct ppc_dyn_relocs *p;
5510
5511 /* Adjust dynamic relocs. */
5512 eh = (struct ppc_link_hash_entry *) h;
5513 for (pp = &eh->dyn_relocs;
5514 (p = *pp) != NULL;
5515 pp = &p->next)
5516 if (p->sec == sec)
5517 {
5518 /* If we got rid of a DTPMOD/DTPREL reloc
5519 pair then we'll lose one or two dyn
5520 relocs. */
5521 if (tls_set == (TLS_EXPLICIT | TLS_GD))
5522 p->count -= 1;
5523 p->count -= 1;
5524 if (p->count == 0)
5525 *pp = p->next;
5526 break;
5527 }
5528 }
5529
5530 *tls_mask |= tls_set;
5531 *tls_mask &= ~tls_clear;
5532 }
5533
5534 if (elf_section_data (sec)->relocs != relstart)
5535 free (relstart);
5536 }
5537
5538 if (locsyms != NULL
5539 && (elf_tdata (ibfd)->symtab_hdr.contents
5540 != (unsigned char *) locsyms))
5541 {
5542 if (!info->keep_memory)
5543 free (locsyms);
5544 else
5545 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms;
5546 }
5547 }
5548 return TRUE;
5549 }
5550
5551 /* This is the condition under which ppc64_elf_finish_dynamic_symbol
5552 will be called from elflink.h. If elflink.h doesn't call our
5553 finish_dynamic_symbol routine, we'll need to do something about
5554 initializing any .plt and .got entries in ppc64_elf_relocate_section. */
5555 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
5556 ((DYN) \
5557 && ((SHARED) \
5558 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
5559 && ((H)->dynindx != -1 \
5560 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
5561
5562 /* Allocate space in .plt, .got and associated reloc sections for
5563 dynamic relocs. */
5564
5565 static bfd_boolean
5566 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5567 {
5568 struct bfd_link_info *info;
5569 struct ppc_link_hash_table *htab;
5570 asection *s;
5571 struct ppc_link_hash_entry *eh;
5572 struct ppc_dyn_relocs *p;
5573 struct got_entry *gent;
5574
5575 if (h->root.type == bfd_link_hash_indirect)
5576 return TRUE;
5577
5578 if (h->root.type == bfd_link_hash_warning)
5579 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5580
5581 info = (struct bfd_link_info *) inf;
5582 htab = ppc_hash_table (info);
5583
5584 if (htab->elf.dynamic_sections_created
5585 && h->dynindx != -1
5586 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
5587 {
5588 struct plt_entry *pent;
5589 bfd_boolean doneone = FALSE;
5590 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
5591 if (pent->plt.refcount > 0)
5592 {
5593 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
5594
5595 /* If this is the first .plt entry, make room for the special
5596 first entry. */
5597 s = htab->plt;
5598 if (s->_raw_size == 0)
5599 s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
5600
5601 pent->plt.offset = s->_raw_size;
5602
5603 /* Make room for this entry. */
5604 s->_raw_size += PLT_ENTRY_SIZE;
5605
5606 /* Make room for the .glink code. */
5607 s = htab->glink;
5608 if (s->_raw_size == 0)
5609 s->_raw_size += GLINK_CALL_STUB_SIZE;
5610 /* We need bigger stubs past index 32767. */
5611 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
5612 s->_raw_size += 4;
5613 s->_raw_size += 2*4;
5614
5615 /* We also need to make an entry in the .rela.plt section. */
5616 s = htab->relplt;
5617 s->_raw_size += sizeof (Elf64_External_Rela);
5618 doneone = TRUE;
5619 }
5620 else
5621 pent->plt.offset = (bfd_vma) -1;
5622 if (!doneone)
5623 {
5624 h->plt.plist = NULL;
5625 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5626 }
5627 }
5628 else
5629 {
5630 h->plt.plist = NULL;
5631 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
5632 }
5633
5634 eh = (struct ppc_link_hash_entry *) h;
5635 /* Run through the TLS GD got entries first if we're changing them
5636 to TPREL. */
5637 if ((eh->tls_mask & TLS_TPRELGD) != 0)
5638 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5639 if (gent->got.refcount > 0
5640 && (gent->tls_type & TLS_GD) != 0)
5641 {
5642 /* This was a GD entry that has been converted to TPREL. If
5643 there happens to be a TPREL entry we can use that one. */
5644 struct got_entry *ent;
5645 for (ent = h->got.glist; ent != NULL; ent = ent->next)
5646 if (ent->got.refcount > 0
5647 && (ent->tls_type & TLS_TPREL) != 0
5648 && ent->addend == gent->addend
5649 && ent->owner == gent->owner)
5650 {
5651 gent->got.refcount = 0;
5652 break;
5653 }
5654
5655 /* If not, then we'll be using our own TPREL entry. */
5656 if (gent->got.refcount != 0)
5657 gent->tls_type = TLS_TLS | TLS_TPREL;
5658 }
5659
5660 for (gent = h->got.glist; gent != NULL; gent = gent->next)
5661 if (gent->got.refcount > 0)
5662 {
5663 bfd_boolean dyn;
5664
5665 /* Make sure this symbol is output as a dynamic symbol.
5666 Undefined weak syms won't yet be marked as dynamic,
5667 nor will all TLS symbols. */
5668 if (h->dynindx == -1
5669 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5670 {
5671 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5672 return FALSE;
5673 }
5674
5675 if ((gent->tls_type & TLS_LD) != 0
5676 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
5677 {
5678 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset;
5679 continue;
5680 }
5681
5682 s = ppc64_elf_tdata (gent->owner)->got;
5683 gent->got.offset = s->_raw_size;
5684 s->_raw_size
5685 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
5686 dyn = htab->elf.dynamic_sections_created;
5687 if ((info->shared
5688 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5689 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5690 || h->root.type != bfd_link_hash_undefweak))
5691 ppc64_elf_tdata (gent->owner)->relgot->_raw_size
5692 += (gent->tls_type & eh->tls_mask & TLS_GD
5693 ? 2 * sizeof (Elf64_External_Rela)
5694 : sizeof (Elf64_External_Rela));
5695 }
5696 else
5697 gent->got.offset = (bfd_vma) -1;
5698
5699 if (eh->dyn_relocs == NULL)
5700 return TRUE;
5701
5702 /* In the shared -Bsymbolic case, discard space allocated for
5703 dynamic pc-relative relocs against symbols which turn out to be
5704 defined in regular objects. For the normal shared case, discard
5705 space for relocs that have become local due to symbol visibility
5706 changes. */
5707
5708 if (info->shared)
5709 {
5710 /* Relocs that use pc_count are those that appear on a call insn,
5711 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
5712 generated via assembly. We want calls to protected symbols to
5713 resolve directly to the function rather than going via the plt.
5714 If people want function pointer comparisons to work as expected
5715 then they should avoid writing weird assembly. */
5716 if (SYMBOL_CALLS_LOCAL (info, h))
5717 {
5718 struct ppc_dyn_relocs **pp;
5719
5720 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5721 {
5722 p->count -= p->pc_count;
5723 p->pc_count = 0;
5724 if (p->count == 0)
5725 *pp = p->next;
5726 else
5727 pp = &p->next;
5728 }
5729 }
5730
5731 /* Also discard relocs on undefined weak syms with non-default
5732 visibility. */
5733 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5734 && h->root.type == bfd_link_hash_undefweak)
5735 eh->dyn_relocs = NULL;
5736 }
5737 else if (ELIMINATE_COPY_RELOCS)
5738 {
5739 /* For the non-shared case, discard space for relocs against
5740 symbols which turn out to need copy relocs or are not
5741 dynamic. */
5742
5743 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
5744 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
5745 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
5746 {
5747 /* Make sure this symbol is output as a dynamic symbol.
5748 Undefined weak syms won't yet be marked as dynamic. */
5749 if (h->dynindx == -1
5750 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
5751 {
5752 if (! bfd_elf64_link_record_dynamic_symbol (info, h))
5753 return FALSE;
5754 }
5755
5756 /* If that succeeded, we know we'll be keeping all the
5757 relocs. */
5758 if (h->dynindx != -1)
5759 goto keep;
5760 }
5761
5762 eh->dyn_relocs = NULL;
5763
5764 keep: ;
5765 }
5766
5767 /* Finally, allocate space. */
5768 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5769 {
5770 asection *sreloc = elf_section_data (p->sec)->sreloc;
5771 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
5772 }
5773
5774 return TRUE;
5775 }
5776
5777 /* Find any dynamic relocs that apply to read-only sections. */
5778
5779 static bfd_boolean
5780 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5781 {
5782 struct ppc_link_hash_entry *eh;
5783 struct ppc_dyn_relocs *p;
5784
5785 if (h->root.type == bfd_link_hash_warning)
5786 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5787
5788 eh = (struct ppc_link_hash_entry *) h;
5789 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5790 {
5791 asection *s = p->sec->output_section;
5792
5793 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5794 {
5795 struct bfd_link_info *info = inf;
5796
5797 info->flags |= DF_TEXTREL;
5798
5799 /* Not an error, just cut short the traversal. */
5800 return FALSE;
5801 }
5802 }
5803 return TRUE;
5804 }
5805
5806 /* Set the sizes of the dynamic sections. */
5807
5808 static bfd_boolean
5809 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5810 struct bfd_link_info *info)
5811 {
5812 struct ppc_link_hash_table *htab;
5813 bfd *dynobj;
5814 asection *s;
5815 bfd_boolean relocs;
5816 bfd *ibfd;
5817
5818 htab = ppc_hash_table (info);
5819 dynobj = htab->elf.dynobj;
5820 if (dynobj == NULL)
5821 abort ();
5822
5823 if (htab->elf.dynamic_sections_created)
5824 {
5825 /* Set the contents of the .interp section to the interpreter. */
5826 if (info->executable)
5827 {
5828 s = bfd_get_section_by_name (dynobj, ".interp");
5829 if (s == NULL)
5830 abort ();
5831 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
5832 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5833 }
5834 }
5835
5836 /* Set up .got offsets for local syms, and space for local dynamic
5837 relocs. */
5838 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5839 {
5840 struct got_entry **lgot_ents;
5841 struct got_entry **end_lgot_ents;
5842 char *lgot_masks;
5843 bfd_size_type locsymcount;
5844 Elf_Internal_Shdr *symtab_hdr;
5845 asection *srel;
5846
5847 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5848 continue;
5849
5850 if (ppc64_tlsld_got (ibfd)->refcount > 0)
5851 {
5852 s = ppc64_elf_tdata (ibfd)->got;
5853 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5854 s->_raw_size += 16;
5855 if (info->shared)
5856 {
5857 srel = ppc64_elf_tdata (ibfd)->relgot;
5858 srel->_raw_size += sizeof (Elf64_External_Rela);
5859 }
5860 }
5861 else
5862 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
5863
5864 for (s = ibfd->sections; s != NULL; s = s->next)
5865 {
5866 struct ppc_dyn_relocs *p;
5867
5868 for (p = *((struct ppc_dyn_relocs **)
5869 &elf_section_data (s)->local_dynrel);
5870 p != NULL;
5871 p = p->next)
5872 {
5873 if (!bfd_is_abs_section (p->sec)
5874 && bfd_is_abs_section (p->sec->output_section))
5875 {
5876 /* Input section has been discarded, either because
5877 it is a copy of a linkonce section or due to
5878 linker script /DISCARD/, so we'll be discarding
5879 the relocs too. */
5880 }
5881 else if (p->count != 0)
5882 {
5883 srel = elf_section_data (p->sec)->sreloc;
5884 srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
5885 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5886 info->flags |= DF_TEXTREL;
5887 }
5888 }
5889 }
5890
5891 lgot_ents = elf_local_got_ents (ibfd);
5892 if (!lgot_ents)
5893 continue;
5894
5895 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5896 locsymcount = symtab_hdr->sh_info;
5897 end_lgot_ents = lgot_ents + locsymcount;
5898 lgot_masks = (char *) end_lgot_ents;
5899 s = ppc64_elf_tdata (ibfd)->got;
5900 srel = ppc64_elf_tdata (ibfd)->relgot;
5901 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
5902 {
5903 struct got_entry *ent;
5904
5905 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
5906 if (ent->got.refcount > 0)
5907 {
5908 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
5909 {
5910 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1)
5911 {
5912 ppc64_tlsld_got (ibfd)->offset = s->_raw_size;
5913 s->_raw_size += 16;
5914 if (info->shared)
5915 srel->_raw_size += sizeof (Elf64_External_Rela);
5916 }
5917 ent->got.offset = ppc64_tlsld_got (ibfd)->offset;
5918 }
5919 else
5920 {
5921 ent->got.offset = s->_raw_size;
5922 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
5923 {
5924 s->_raw_size += 16;
5925 if (info->shared)
5926 srel->_raw_size += 2 * sizeof (Elf64_External_Rela);
5927 }
5928 else
5929 {
5930 s->_raw_size += 8;
5931 if (info->shared)
5932 srel->_raw_size += sizeof (Elf64_External_Rela);
5933 }
5934 }
5935 }
5936 else
5937 ent->got.offset = (bfd_vma) -1;
5938 }
5939 }
5940
5941 /* Allocate global sym .plt and .got entries, and space for global
5942 sym dynamic relocs. */
5943 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
5944
5945 /* We now have determined the sizes of the various dynamic sections.
5946 Allocate memory for them. */
5947 relocs = FALSE;
5948 for (s = dynobj->sections; s != NULL; s = s->next)
5949 {
5950 if ((s->flags & SEC_LINKER_CREATED) == 0)
5951 continue;
5952
5953 /* Reset _cooked_size since prelim layout will set it wrongly,
5954 and a non-zero _cooked_size sticks. */
5955 s->_cooked_size = 0;
5956
5957 if (s == htab->brlt || s == htab->relbrlt)
5958 /* These haven't been allocated yet; don't strip. */
5959 continue;
5960 else if (s == htab->got
5961 || s == htab->plt
5962 || s == htab->glink)
5963 {
5964 /* Strip this section if we don't need it; see the
5965 comment below. */
5966 }
5967 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
5968 {
5969 if (s->_raw_size == 0)
5970 {
5971 /* If we don't need this section, strip it from the
5972 output file. This is mostly to handle .rela.bss and
5973 .rela.plt. We must create both sections in
5974 create_dynamic_sections, because they must be created
5975 before the linker maps input sections to output
5976 sections. The linker does that before
5977 adjust_dynamic_symbol is called, and it is that
5978 function which decides whether anything needs to go
5979 into these sections. */
5980 }
5981 else
5982 {
5983 if (s != htab->relplt)
5984 relocs = TRUE;
5985
5986 /* We use the reloc_count field as a counter if we need
5987 to copy relocs into the output file. */
5988 s->reloc_count = 0;
5989 }
5990 }
5991 else
5992 {
5993 /* It's not one of our sections, so don't allocate space. */
5994 continue;
5995 }
5996
5997 if (s->_raw_size == 0)
5998 {
5999 _bfd_strip_section_from_output (info, s);
6000 continue;
6001 }
6002
6003 /* .plt is in the bss section. We don't initialise it. */
6004 if ((s->flags & SEC_LOAD) == 0)
6005 continue;
6006
6007 /* Allocate memory for the section contents. We use bfd_zalloc
6008 here in case unused entries are not reclaimed before the
6009 section's contents are written out. This should not happen,
6010 but this way if it does we get a R_PPC64_NONE reloc in .rela
6011 sections instead of garbage.
6012 We also rely on the section contents being zero when writing
6013 the GOT. */
6014 s->contents = bfd_zalloc (dynobj, s->_raw_size);
6015 if (s->contents == NULL)
6016 return FALSE;
6017 }
6018
6019 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6020 {
6021 s = ppc64_elf_tdata (ibfd)->got;
6022 if (s != NULL && s != htab->got)
6023 {
6024 s->_cooked_size = 0;
6025 if (s->_raw_size == 0)
6026 _bfd_strip_section_from_output (info, s);
6027 else
6028 {
6029 s->contents = bfd_zalloc (ibfd, s->_raw_size);
6030 if (s->contents == NULL)
6031 return FALSE;
6032 }
6033 }
6034 s = ppc64_elf_tdata (ibfd)->relgot;
6035 if (s != NULL)
6036 {
6037 s->_cooked_size = 0;
6038 if (s->_raw_size == 0)
6039 _bfd_strip_section_from_output (info, s);
6040 else
6041 {
6042 s->contents = bfd_zalloc (ibfd, s->_raw_size);
6043 if (s->contents == NULL)
6044 return FALSE;
6045 relocs = TRUE;
6046 s->reloc_count = 0;
6047 }
6048 }
6049 }
6050
6051 if (htab->elf.dynamic_sections_created)
6052 {
6053 /* Add some entries to the .dynamic section. We fill in the
6054 values later, in ppc64_elf_finish_dynamic_sections, but we
6055 must add the entries now so that we get the correct size for
6056 the .dynamic section. The DT_DEBUG entry is filled in by the
6057 dynamic linker and used by the debugger. */
6058 #define add_dynamic_entry(TAG, VAL) \
6059 bfd_elf64_add_dynamic_entry (info, (TAG), (VAL))
6060
6061 if (info->executable)
6062 {
6063 if (!add_dynamic_entry (DT_DEBUG, 0))
6064 return FALSE;
6065 }
6066
6067 if (htab->plt != NULL && htab->plt->_raw_size != 0)
6068 {
6069 if (!add_dynamic_entry (DT_PLTGOT, 0)
6070 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6071 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6072 || !add_dynamic_entry (DT_JMPREL, 0)
6073 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
6074 return FALSE;
6075 }
6076
6077 if (NO_OPD_RELOCS)
6078 {
6079 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
6080 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
6081 return FALSE;
6082 }
6083
6084 if (relocs)
6085 {
6086 if (!add_dynamic_entry (DT_RELA, 0)
6087 || !add_dynamic_entry (DT_RELASZ, 0)
6088 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
6089 return FALSE;
6090
6091 /* If any dynamic relocs apply to a read-only section,
6092 then we need a DT_TEXTREL entry. */
6093 if ((info->flags & DF_TEXTREL) == 0)
6094 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
6095
6096 if ((info->flags & DF_TEXTREL) != 0)
6097 {
6098 if (!add_dynamic_entry (DT_TEXTREL, 0))
6099 return FALSE;
6100 }
6101 }
6102 }
6103 #undef add_dynamic_entry
6104
6105 return TRUE;
6106 }
6107
6108 /* Determine the type of stub needed, if any, for a call. */
6109
6110 static inline enum ppc_stub_type
6111 ppc_type_of_stub (asection *input_sec,
6112 const Elf_Internal_Rela *rel,
6113 struct ppc_link_hash_entry **hash,
6114 bfd_vma destination)
6115 {
6116 struct ppc_link_hash_entry *h = *hash;
6117 bfd_vma location;
6118 bfd_vma branch_offset;
6119 bfd_vma max_branch_offset;
6120 enum elf_ppc64_reloc_type r_type;
6121
6122 if (h != NULL)
6123 {
6124 if (h->oh != NULL
6125 && h->oh->dynindx != -1)
6126 {
6127 struct plt_entry *ent;
6128 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next)
6129 if (ent->addend == rel->r_addend
6130 && ent->plt.offset != (bfd_vma) -1)
6131 {
6132 *hash = (struct ppc_link_hash_entry *) h->oh;
6133 return ppc_stub_plt_call;
6134 }
6135 }
6136
6137 if (!(h->elf.root.type == bfd_link_hash_defined
6138 || h->elf.root.type == bfd_link_hash_defweak)
6139 || h->elf.root.u.def.section->output_section == NULL)
6140 return ppc_stub_none;
6141 }
6142
6143 /* Determine where the call point is. */
6144 location = (input_sec->output_offset
6145 + input_sec->output_section->vma
6146 + rel->r_offset);
6147
6148 branch_offset = destination - location;
6149 r_type = ELF64_R_TYPE (rel->r_info);
6150
6151 /* Determine if a long branch stub is needed. */
6152 max_branch_offset = 1 << 25;
6153 if (r_type != R_PPC64_REL24)
6154 max_branch_offset = 1 << 15;
6155
6156 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
6157 /* We need a stub. Figure out whether a long_branch or plt_branch
6158 is needed later. */
6159 return ppc_stub_long_branch;
6160
6161 return ppc_stub_none;
6162 }
6163
6164 /* Build a .plt call stub. */
6165
6166 static inline bfd_byte *
6167 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
6168 {
6169 #define PPC_LO(v) ((v) & 0xffff)
6170 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6171 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6172
6173 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
6174 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
6175 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6176 if (PPC_HA (offset + 8) != PPC_HA (offset))
6177 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6178 offset += 8;
6179 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
6180 if (PPC_HA (offset + 8) != PPC_HA (offset))
6181 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4;
6182 offset += 8;
6183 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
6184 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
6185 bfd_put_32 (obfd, BCTR, p), p += 4;
6186 return p;
6187 }
6188
6189 static bfd_boolean
6190 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6191 {
6192 struct ppc_stub_hash_entry *stub_entry;
6193 struct ppc_branch_hash_entry *br_entry;
6194 struct bfd_link_info *info;
6195 struct ppc_link_hash_table *htab;
6196 bfd_byte *loc;
6197 bfd_byte *p;
6198 unsigned int indx;
6199 struct plt_entry *ent;
6200 bfd_vma off;
6201 int size;
6202
6203 /* Massage our args to the form they really have. */
6204 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6205 info = in_arg;
6206
6207 htab = ppc_hash_table (info);
6208
6209 /* Make a note of the offset within the stubs for this entry. */
6210 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size;
6211 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
6212
6213 htab->stub_count[stub_entry->stub_type - 1] += 1;
6214 switch (stub_entry->stub_type)
6215 {
6216 case ppc_stub_long_branch:
6217 case ppc_stub_long_branch_r2off:
6218 /* Branches are relative. This is where we are going to. */
6219 off = (stub_entry->target_value
6220 + stub_entry->target_section->output_offset
6221 + stub_entry->target_section->output_section->vma);
6222
6223 /* And this is where we are coming from. */
6224 off -= (stub_entry->stub_offset
6225 + stub_entry->stub_sec->output_offset
6226 + stub_entry->stub_sec->output_section->vma);
6227
6228 if (stub_entry->stub_type != ppc_stub_long_branch_r2off)
6229 size = 4;
6230 else
6231 {
6232 bfd_vma r2off;
6233
6234 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6235 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6236 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6237 loc += 4;
6238 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6239 loc += 4;
6240 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6241 loc += 4;
6242 off -= 12;
6243 size = 16;
6244 }
6245 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
6246
6247 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
6248 break;
6249
6250 case ppc_stub_plt_branch:
6251 case ppc_stub_plt_branch_r2off:
6252 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6253 stub_entry->root.string + 9,
6254 FALSE, FALSE);
6255 if (br_entry == NULL)
6256 {
6257 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
6258 stub_entry->root.string + 9);
6259 htab->stub_error = TRUE;
6260 return FALSE;
6261 }
6262
6263 off = (stub_entry->target_value
6264 + stub_entry->target_section->output_offset
6265 + stub_entry->target_section->output_section->vma);
6266
6267 bfd_put_64 (htab->brlt->owner, off,
6268 htab->brlt->contents + br_entry->offset);
6269
6270 if (info->shared)
6271 {
6272 /* Create a reloc for the branch lookup table entry. */
6273 Elf_Internal_Rela rela;
6274 bfd_byte *rl;
6275
6276 rela.r_offset = (br_entry->offset
6277 + htab->brlt->output_offset
6278 + htab->brlt->output_section->vma);
6279 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
6280 rela.r_addend = off;
6281
6282 rl = htab->relbrlt->contents;
6283 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela);
6284 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
6285 }
6286
6287 off = (br_entry->offset
6288 + htab->brlt->output_offset
6289 + htab->brlt->output_section->vma
6290 - elf_gp (htab->brlt->output_section->owner)
6291 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6292
6293 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6294 {
6295 (*_bfd_error_handler)
6296 (_("linkage table error against `%s'"),
6297 stub_entry->root.string);
6298 bfd_set_error (bfd_error_bad_value);
6299 htab->stub_error = TRUE;
6300 return FALSE;
6301 }
6302
6303 indx = off;
6304 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
6305 {
6306 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6307 loc += 4;
6308 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6309 size = 16;
6310 }
6311 else
6312 {
6313 bfd_vma r2off;
6314
6315 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
6316 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6317 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
6318 loc += 4;
6319 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
6320 loc += 4;
6321 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
6322 loc += 4;
6323 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
6324 loc += 4;
6325 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
6326 size = 28;
6327 }
6328 loc += 4;
6329 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
6330 loc += 4;
6331 bfd_put_32 (htab->stub_bfd, BCTR, loc);
6332 break;
6333
6334 case ppc_stub_plt_call:
6335 /* Do the best we can for shared libraries built without
6336 exporting ".foo" for each "foo". This can happen when symbol
6337 versioning scripts strip all bar a subset of symbols. */
6338 if (stub_entry->h->oh->root.type != bfd_link_hash_defined
6339 && stub_entry->h->oh->root.type != bfd_link_hash_defweak)
6340 {
6341 /* Point the symbol at the stub. There may be multiple stubs,
6342 we don't really care; The main thing is to make this sym
6343 defined somewhere. Maybe defining the symbol in the stub
6344 section is a silly idea. If we didn't do this, htab->top_id
6345 could disappear. */
6346 stub_entry->h->oh->root.type = bfd_link_hash_defined;
6347 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
6348 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
6349 }
6350
6351 /* Now build the stub. */
6352 off = (bfd_vma) -1;
6353 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6354 if (ent->addend == stub_entry->addend)
6355 {
6356 off = ent->plt.offset;
6357 break;
6358 }
6359 if (off >= (bfd_vma) -2)
6360 abort ();
6361
6362 off &= ~ (bfd_vma) 1;
6363 off += (htab->plt->output_offset
6364 + htab->plt->output_section->vma
6365 - elf_gp (htab->plt->output_section->owner)
6366 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6367
6368 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
6369 {
6370 (*_bfd_error_handler)
6371 (_("linkage table error against `%s'"),
6372 stub_entry->h->elf.root.root.string);
6373 bfd_set_error (bfd_error_bad_value);
6374 htab->stub_error = TRUE;
6375 return FALSE;
6376 }
6377
6378 p = build_plt_stub (htab->stub_bfd, loc, off);
6379 size = p - loc;
6380 break;
6381
6382 default:
6383 BFD_FAIL ();
6384 return FALSE;
6385 }
6386
6387 stub_entry->stub_sec->_cooked_size += size;
6388
6389 if (htab->emit_stub_syms
6390 && !(stub_entry->stub_type == ppc_stub_plt_call
6391 && stub_entry->h->oh->root.type == bfd_link_hash_defined
6392 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec
6393 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset))
6394 {
6395 struct elf_link_hash_entry *h;
6396 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string,
6397 TRUE, FALSE, FALSE);
6398 if (h == NULL)
6399 return FALSE;
6400 if (h->root.type == bfd_link_hash_new)
6401 {
6402 h->root.type = bfd_link_hash_defined;
6403 h->root.u.def.section = stub_entry->stub_sec;
6404 h->root.u.def.value = stub_entry->stub_offset;
6405 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
6406 | ELF_LINK_HASH_DEF_REGULAR
6407 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
6408 | ELF_LINK_FORCED_LOCAL);
6409 }
6410 }
6411
6412 return TRUE;
6413 }
6414
6415 /* As above, but don't actually build the stub. Just bump offset so
6416 we know stub section sizes, and select plt_branch stubs where
6417 long_branch stubs won't do. */
6418
6419 static bfd_boolean
6420 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6421 {
6422 struct ppc_stub_hash_entry *stub_entry;
6423 struct bfd_link_info *info;
6424 struct ppc_link_hash_table *htab;
6425 bfd_vma off;
6426 int size;
6427
6428 /* Massage our args to the form they really have. */
6429 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
6430 info = in_arg;
6431
6432 htab = ppc_hash_table (info);
6433
6434 if (stub_entry->stub_type == ppc_stub_plt_call)
6435 {
6436 struct plt_entry *ent;
6437 off = (bfd_vma) -1;
6438 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
6439 if (ent->addend == stub_entry->addend)
6440 {
6441 off = ent->plt.offset & ~(bfd_vma) 1;
6442 break;
6443 }
6444 if (off >= (bfd_vma) -2)
6445 abort ();
6446 off += (htab->plt->output_offset
6447 + htab->plt->output_section->vma
6448 - elf_gp (htab->plt->output_section->owner)
6449 - htab->stub_group[stub_entry->id_sec->id].toc_off);
6450
6451 size = PLT_CALL_STUB_SIZE;
6452 if (PPC_HA (off + 16) != PPC_HA (off))
6453 size += 4;
6454 }
6455 else
6456 {
6457 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
6458 variants. */
6459 off = (stub_entry->target_value
6460 + stub_entry->target_section->output_offset
6461 + stub_entry->target_section->output_section->vma);
6462 off -= (stub_entry->stub_sec->_raw_size
6463 + stub_entry->stub_sec->output_offset
6464 + stub_entry->stub_sec->output_section->vma);
6465
6466 /* Reset the stub type from the plt variant in case we now
6467 can reach with a shorter stub. */
6468 if (stub_entry->stub_type >= ppc_stub_plt_branch)
6469 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
6470
6471 size = 4;
6472 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
6473 {
6474 off -= 12;
6475 size = 16;
6476 }
6477
6478 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
6479 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
6480 {
6481 struct ppc_branch_hash_entry *br_entry;
6482
6483 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
6484 stub_entry->root.string + 9,
6485 TRUE, FALSE);
6486 if (br_entry == NULL)
6487 {
6488 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
6489 stub_entry->root.string + 9);
6490 htab->stub_error = TRUE;
6491 return FALSE;
6492 }
6493
6494 if (br_entry->iter != htab->stub_iteration)
6495 {
6496 br_entry->iter = htab->stub_iteration;
6497 br_entry->offset = htab->brlt->_raw_size;
6498 htab->brlt->_raw_size += 8;
6499
6500 if (info->shared)
6501 htab->relbrlt->_raw_size += sizeof (Elf64_External_Rela);
6502 }
6503
6504 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
6505 size = 16;
6506 if (stub_entry->stub_type != ppc_stub_plt_branch)
6507 size = 28;
6508 }
6509 }
6510
6511 stub_entry->stub_sec->_raw_size += size;
6512 return TRUE;
6513 }
6514
6515 /* Set up various things so that we can make a list of input sections
6516 for each output section included in the link. Returns -1 on error,
6517 0 when no stubs will be needed, and 1 on success. */
6518
6519 int
6520 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
6521 {
6522 bfd *input_bfd;
6523 int top_id, top_index, id;
6524 asection *section;
6525 asection **input_list;
6526 bfd_size_type amt;
6527 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6528
6529 if (htab->brlt == NULL)
6530 return 0;
6531
6532 /* Find the top input section id. */
6533 for (input_bfd = info->input_bfds, top_id = 3;
6534 input_bfd != NULL;
6535 input_bfd = input_bfd->link_next)
6536 {
6537 for (section = input_bfd->sections;
6538 section != NULL;
6539 section = section->next)
6540 {
6541 if (top_id < section->id)
6542 top_id = section->id;
6543 }
6544 }
6545
6546 htab->top_id = top_id;
6547 amt = sizeof (struct map_stub) * (top_id + 1);
6548 htab->stub_group = bfd_zmalloc (amt);
6549 if (htab->stub_group == NULL)
6550 return -1;
6551
6552 /* Set toc_off for com, und, abs and ind sections. */
6553 for (id = 0; id < 3; id++)
6554 htab->stub_group[id].toc_off = TOC_BASE_OFF;
6555
6556 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
6557
6558 /* We can't use output_bfd->section_count here to find the top output
6559 section index as some sections may have been removed, and
6560 _bfd_strip_section_from_output doesn't renumber the indices. */
6561 for (section = output_bfd->sections, top_index = 0;
6562 section != NULL;
6563 section = section->next)
6564 {
6565 if (top_index < section->index)
6566 top_index = section->index;
6567 }
6568
6569 htab->top_index = top_index;
6570 amt = sizeof (asection *) * (top_index + 1);
6571 input_list = bfd_zmalloc (amt);
6572 htab->input_list = input_list;
6573 if (input_list == NULL)
6574 return -1;
6575
6576 return 1;
6577 }
6578
6579 /* The linker repeatedly calls this function for each TOC input section
6580 and linker generated GOT section. Group input bfds such that the toc
6581 within a group is less than 64k in size. Will break with cute linker
6582 scripts that play games with dot in the output toc section. */
6583
6584 void
6585 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
6586 {
6587 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6588
6589 if (!htab->no_multi_toc)
6590 {
6591 bfd_vma addr = isec->output_offset + isec->output_section->vma;
6592 bfd_vma off = addr - htab->toc_curr;
6593 if (off + isec->_raw_size > 0x10000)
6594 {
6595 htab->toc_curr = addr;
6596 htab->multi_toc_needed = 1;
6597 }
6598 elf_gp (isec->owner) = (htab->toc_curr
6599 - elf_gp (isec->output_section->owner)
6600 + TOC_BASE_OFF);
6601 }
6602 }
6603
6604 /* Called after the last call to the above function. */
6605
6606 void
6607 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED,
6608 struct bfd_link_info *info)
6609 {
6610 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6611
6612 /* toc_curr tracks the TOC offset used for code sections below in
6613 ppc64_elf_next_input_section. Start off at 0x8000. */
6614 htab->toc_curr = TOC_BASE_OFF;
6615 }
6616
6617 /* No toc references were found in ISEC. If the code in ISEC makes no
6618 calls, then there's no need to use toc adjusting stubs when branching
6619 into ISEC. Actually, indirect calls from ISEC are OK as they will
6620 load r2. */
6621
6622 static int
6623 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
6624 {
6625 bfd_byte *contents;
6626 bfd_size_type i;
6627 int ret;
6628 int branch_ok;
6629
6630 /* We know none of our code bearing sections will need toc stubs. */
6631 if ((isec->flags & SEC_LINKER_CREATED) != 0)
6632 return 0;
6633
6634 if (isec->_raw_size == 0)
6635 return 0;
6636
6637 /* Hack for linux kernel. .fixup contains branches, but only back to
6638 the function that hit an exception. */
6639 branch_ok = strcmp (isec->name, ".fixup") == 0;
6640
6641 contents = elf_section_data (isec)->this_hdr.contents;
6642 if (contents == NULL)
6643 {
6644 contents = bfd_malloc (isec->_raw_size);
6645 if (contents == NULL)
6646 return -1;
6647 if (! bfd_get_section_contents (isec->owner, isec, contents,
6648 0, isec->_raw_size))
6649 {
6650 free (contents);
6651 return -1;
6652 }
6653 if (info->keep_memory)
6654 elf_section_data (isec)->this_hdr.contents = contents;
6655 }
6656
6657 /* Code scan, because we don't necessarily have relocs on calls to
6658 static functions. */
6659 ret = 0;
6660 for (i = 0; i < isec->_raw_size; i += 4)
6661 {
6662 unsigned long insn = bfd_get_32 (isec->owner, contents + i);
6663 /* Is this a branch? */
6664 if ((insn & (0x3f << 26)) == (18 << 26)
6665 /* If branch and link, it's a function call. */
6666 && ((insn & 1) != 0
6667 /* Sibling calls use a plain branch. I don't know a way
6668 of deciding whether a branch is really a sibling call. */
6669 || !branch_ok))
6670 {
6671 ret = 1;
6672 break;
6673 }
6674 }
6675
6676 if (elf_section_data (isec)->this_hdr.contents != contents)
6677 free (contents);
6678 return ret;
6679 }
6680
6681 /* The linker repeatedly calls this function for each input section,
6682 in the order that input sections are linked into output sections.
6683 Build lists of input sections to determine groupings between which
6684 we may insert linker stubs. */
6685
6686 bfd_boolean
6687 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
6688 {
6689 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6690 int ret;
6691
6692 if ((isec->output_section->flags & SEC_CODE) != 0
6693 && isec->output_section->index <= htab->top_index)
6694 {
6695 asection **list = htab->input_list + isec->output_section->index;
6696 /* Steal the link_sec pointer for our list. */
6697 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
6698 /* This happens to make the list in reverse order,
6699 which is what we want. */
6700 PREV_SEC (isec) = *list;
6701 *list = isec;
6702 }
6703
6704 /* If a code section has a function that uses the TOC then we need
6705 to use the right TOC (obviously). Also, make sure that .opd gets
6706 the correct TOC value for R_PPC64_TOC relocs that don't have or
6707 can't find their function symbol (shouldn't ever happen now). */
6708 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0)
6709 {
6710 if (elf_gp (isec->owner) != 0)
6711 htab->toc_curr = elf_gp (isec->owner);
6712 }
6713 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0)
6714 return FALSE;
6715 else
6716 isec->has_gp_reloc = ret;
6717
6718 /* Functions that don't use the TOC can belong in any TOC group.
6719 Use the last TOC base. This happens to make _init and _fini
6720 pasting work. */
6721 htab->stub_group[isec->id].toc_off = htab->toc_curr;
6722 return TRUE;
6723 }
6724
6725 /* See whether we can group stub sections together. Grouping stub
6726 sections may result in fewer stubs. More importantly, we need to
6727 put all .init* and .fini* stubs at the beginning of the .init or
6728 .fini output sections respectively, because glibc splits the
6729 _init and _fini functions into multiple parts. Putting a stub in
6730 the middle of a function is not a good idea. */
6731
6732 static void
6733 group_sections (struct ppc_link_hash_table *htab,
6734 bfd_size_type stub_group_size,
6735 bfd_boolean stubs_always_before_branch)
6736 {
6737 asection **list = htab->input_list + htab->top_index;
6738 do
6739 {
6740 asection *tail = *list;
6741 while (tail != NULL)
6742 {
6743 asection *curr;
6744 asection *prev;
6745 bfd_size_type total;
6746 bfd_boolean big_sec;
6747 bfd_vma curr_toc;
6748
6749 curr = tail;
6750 if (tail->_cooked_size)
6751 total = tail->_cooked_size;
6752 else
6753 total = tail->_raw_size;
6754 big_sec = total >= stub_group_size;
6755 curr_toc = htab->stub_group[tail->id].toc_off;
6756
6757 while ((prev = PREV_SEC (curr)) != NULL
6758 && ((total += curr->output_offset - prev->output_offset)
6759 < stub_group_size)
6760 && htab->stub_group[prev->id].toc_off == curr_toc)
6761 curr = prev;
6762
6763 /* OK, the size from the start of CURR to the end is less
6764 than stub_group_size and thus can be handled by one stub
6765 section. (or the tail section is itself larger than
6766 stub_group_size, in which case we may be toast.) We
6767 should really be keeping track of the total size of stubs
6768 added here, as stubs contribute to the final output
6769 section size. That's a little tricky, and this way will
6770 only break if stubs added make the total size more than
6771 2^25, ie. for the default stub_group_size, if stubs total
6772 more than 2097152 bytes, or nearly 75000 plt call stubs. */
6773 do
6774 {
6775 prev = PREV_SEC (tail);
6776 /* Set up this stub group. */
6777 htab->stub_group[tail->id].link_sec = curr;
6778 }
6779 while (tail != curr && (tail = prev) != NULL);
6780
6781 /* But wait, there's more! Input sections up to stub_group_size
6782 bytes before the stub section can be handled by it too.
6783 Don't do this if we have a really large section after the
6784 stubs, as adding more stubs increases the chance that
6785 branches may not reach into the stub section. */
6786 if (!stubs_always_before_branch && !big_sec)
6787 {
6788 total = 0;
6789 while (prev != NULL
6790 && ((total += tail->output_offset - prev->output_offset)
6791 < stub_group_size)
6792 && htab->stub_group[prev->id].toc_off == curr_toc)
6793 {
6794 tail = prev;
6795 prev = PREV_SEC (tail);
6796 htab->stub_group[tail->id].link_sec = curr;
6797 }
6798 }
6799 tail = prev;
6800 }
6801 }
6802 while (list-- != htab->input_list);
6803 free (htab->input_list);
6804 #undef PREV_SEC
6805 }
6806
6807 /* Determine and set the size of the stub section for a final link.
6808
6809 The basic idea here is to examine all the relocations looking for
6810 PC-relative calls to a target that is unreachable with a "bl"
6811 instruction. */
6812
6813 bfd_boolean
6814 ppc64_elf_size_stubs (bfd *output_bfd,
6815 struct bfd_link_info *info,
6816 bfd_signed_vma group_size,
6817 asection *(*add_stub_section) (const char *, asection *),
6818 void (*layout_sections_again) (void))
6819 {
6820 bfd_size_type stub_group_size;
6821 bfd_boolean stubs_always_before_branch;
6822 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6823
6824 /* Stash our params away. */
6825 htab->add_stub_section = add_stub_section;
6826 htab->layout_sections_again = layout_sections_again;
6827 stubs_always_before_branch = group_size < 0;
6828 if (group_size < 0)
6829 stub_group_size = -group_size;
6830 else
6831 stub_group_size = group_size;
6832 if (stub_group_size == 1)
6833 {
6834 /* Default values. */
6835 if (stubs_always_before_branch)
6836 {
6837 stub_group_size = 0x1e00000;
6838 if (htab->has_14bit_branch)
6839 stub_group_size = 0x7800;
6840 }
6841 else
6842 {
6843 stub_group_size = 0x1c00000;
6844 if (htab->has_14bit_branch)
6845 stub_group_size = 0x7000;
6846 }
6847 }
6848
6849 group_sections (htab, stub_group_size, stubs_always_before_branch);
6850
6851 while (1)
6852 {
6853 bfd *input_bfd;
6854 unsigned int bfd_indx;
6855 asection *stub_sec;
6856 bfd_boolean stub_changed;
6857
6858 htab->stub_iteration += 1;
6859 stub_changed = FALSE;
6860
6861 for (input_bfd = info->input_bfds, bfd_indx = 0;
6862 input_bfd != NULL;
6863 input_bfd = input_bfd->link_next, bfd_indx++)
6864 {
6865 Elf_Internal_Shdr *symtab_hdr;
6866 asection *section;
6867 Elf_Internal_Sym *local_syms = NULL;
6868
6869 /* We'll need the symbol table in a second. */
6870 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
6871 if (symtab_hdr->sh_info == 0)
6872 continue;
6873
6874 /* Walk over each section attached to the input bfd. */
6875 for (section = input_bfd->sections;
6876 section != NULL;
6877 section = section->next)
6878 {
6879 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
6880
6881 /* If there aren't any relocs, then there's nothing more
6882 to do. */
6883 if ((section->flags & SEC_RELOC) == 0
6884 || section->reloc_count == 0)
6885 continue;
6886
6887 /* If this section is a link-once section that will be
6888 discarded, then don't create any stubs. */
6889 if (section->output_section == NULL
6890 || section->output_section->owner != output_bfd)
6891 continue;
6892
6893 /* Get the relocs. */
6894 internal_relocs
6895 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
6896 info->keep_memory);
6897 if (internal_relocs == NULL)
6898 goto error_ret_free_local;
6899
6900 /* Now examine each relocation. */
6901 irela = internal_relocs;
6902 irelaend = irela + section->reloc_count;
6903 for (; irela < irelaend; irela++)
6904 {
6905 enum elf_ppc64_reloc_type r_type;
6906 unsigned int r_indx;
6907 enum ppc_stub_type stub_type;
6908 struct ppc_stub_hash_entry *stub_entry;
6909 asection *sym_sec;
6910 bfd_vma sym_value;
6911 bfd_vma destination;
6912 struct ppc_link_hash_entry *hash;
6913 struct elf_link_hash_entry *h;
6914 Elf_Internal_Sym *sym;
6915 char *stub_name;
6916 const asection *id_sec;
6917
6918 r_type = ELF64_R_TYPE (irela->r_info);
6919 r_indx = ELF64_R_SYM (irela->r_info);
6920
6921 if (r_type >= R_PPC64_max)
6922 {
6923 bfd_set_error (bfd_error_bad_value);
6924 goto error_ret_free_internal;
6925 }
6926
6927 /* Only look for stubs on branch instructions. */
6928 if (r_type != R_PPC64_REL24
6929 && r_type != R_PPC64_REL14
6930 && r_type != R_PPC64_REL14_BRTAKEN
6931 && r_type != R_PPC64_REL14_BRNTAKEN)
6932 continue;
6933
6934 /* Now determine the call target, its name, value,
6935 section. */
6936 destination = 0;
6937 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6938 r_indx, input_bfd))
6939 goto error_ret_free_internal;
6940 hash = (struct ppc_link_hash_entry *) h;
6941
6942 if (hash == NULL)
6943 {
6944 /* It's a local symbol. */
6945 sym_value = sym->st_value;
6946 destination = (sym_value + irela->r_addend
6947 + sym_sec->output_offset
6948 + sym_sec->output_section->vma);
6949 }
6950 else
6951 {
6952 /* It's an external symbol. */
6953 sym_value = 0;
6954 if (hash->elf.root.type == bfd_link_hash_defined
6955 || hash->elf.root.type == bfd_link_hash_defweak)
6956 {
6957 sym_value = hash->elf.root.u.def.value;
6958 if (sym_sec->output_section != NULL)
6959 destination = (sym_value + irela->r_addend
6960 + sym_sec->output_offset
6961 + sym_sec->output_section->vma);
6962 }
6963 else if (hash->elf.root.type == bfd_link_hash_undefweak)
6964 ;
6965 else if (hash->elf.root.type == bfd_link_hash_undefined)
6966 ;
6967 else
6968 {
6969 bfd_set_error (bfd_error_bad_value);
6970 goto error_ret_free_internal;
6971 }
6972 }
6973
6974 /* Determine what (if any) linker stub is needed. */
6975 stub_type = ppc_type_of_stub (section, irela, &hash,
6976 destination);
6977
6978 if (stub_type != ppc_stub_plt_call)
6979 {
6980 /* Check whether we need a TOC adjusting stub.
6981 Since the linker pastes together pieces from
6982 different object files when creating the
6983 _init and _fini functions, it may be that a
6984 call to what looks like a local sym is in
6985 fact a call needing a TOC adjustment. */
6986 if (sym_sec != NULL
6987 && sym_sec->output_section != NULL
6988 && (htab->stub_group[sym_sec->id].toc_off
6989 != htab->stub_group[section->id].toc_off)
6990 && sym_sec->has_gp_reloc
6991 && section->has_gp_reloc)
6992 stub_type = ppc_stub_long_branch_r2off;
6993 }
6994
6995 if (stub_type == ppc_stub_none)
6996 continue;
6997
6998 /* __tls_get_addr calls might be eliminated. */
6999 if (stub_type != ppc_stub_plt_call
7000 && hash != NULL
7001 && &hash->elf == htab->tls_get_addr
7002 && section->has_tls_reloc
7003 && irela != internal_relocs)
7004 {
7005 /* Get tls info. */
7006 char *tls_mask;
7007
7008 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
7009 irela - 1, input_bfd))
7010 goto error_ret_free_internal;
7011 if (*tls_mask != 0)
7012 continue;
7013 }
7014
7015 /* Support for grouping stub sections. */
7016 id_sec = htab->stub_group[section->id].link_sec;
7017
7018 /* Get the name of this stub. */
7019 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
7020 if (!stub_name)
7021 goto error_ret_free_internal;
7022
7023 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
7024 stub_name, FALSE, FALSE);
7025 if (stub_entry != NULL)
7026 {
7027 /* The proper stub has already been created. */
7028 free (stub_name);
7029 continue;
7030 }
7031
7032 stub_entry = ppc_add_stub (stub_name, section, htab);
7033 if (stub_entry == NULL)
7034 {
7035 free (stub_name);
7036 error_ret_free_internal:
7037 if (elf_section_data (section)->relocs == NULL)
7038 free (internal_relocs);
7039 error_ret_free_local:
7040 if (local_syms != NULL
7041 && (symtab_hdr->contents
7042 != (unsigned char *) local_syms))
7043 free (local_syms);
7044 return FALSE;
7045 }
7046
7047 stub_entry->stub_type = stub_type;
7048 stub_entry->target_value = sym_value;
7049 stub_entry->target_section = sym_sec;
7050 stub_entry->h = hash;
7051 stub_entry->addend = irela->r_addend;
7052 stub_changed = TRUE;
7053 }
7054
7055 /* We're done with the internal relocs, free them. */
7056 if (elf_section_data (section)->relocs != internal_relocs)
7057 free (internal_relocs);
7058 }
7059
7060 if (local_syms != NULL
7061 && symtab_hdr->contents != (unsigned char *) local_syms)
7062 {
7063 if (!info->keep_memory)
7064 free (local_syms);
7065 else
7066 symtab_hdr->contents = (unsigned char *) local_syms;
7067 }
7068 }
7069
7070 if (!stub_changed)
7071 break;
7072
7073 /* OK, we've added some stubs. Find out the new size of the
7074 stub sections. */
7075 for (stub_sec = htab->stub_bfd->sections;
7076 stub_sec != NULL;
7077 stub_sec = stub_sec->next)
7078 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7079 {
7080 stub_sec->_raw_size = 0;
7081 stub_sec->_cooked_size = 0;
7082 }
7083 htab->brlt->_raw_size = 0;
7084 htab->brlt->_cooked_size = 0;
7085 if (info->shared)
7086 {
7087 htab->relbrlt->_raw_size = 0;
7088 htab->relbrlt->_cooked_size = 0;
7089 }
7090
7091 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
7092
7093 /* Ask the linker to do its stuff. */
7094 (*htab->layout_sections_again) ();
7095 }
7096
7097 /* It would be nice to strip .branch_lt from the output if the
7098 section is empty, but it's too late. If we strip sections here,
7099 the dynamic symbol table is corrupted since the section symbol
7100 for the stripped section isn't written. */
7101
7102 return TRUE;
7103 }
7104
7105 /* Called after we have determined section placement. If sections
7106 move, we'll be called again. Provide a value for TOCstart. */
7107
7108 bfd_vma
7109 ppc64_elf_toc (bfd *obfd)
7110 {
7111 asection *s;
7112 bfd_vma TOCstart;
7113
7114 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
7115 order. The TOC starts where the first of these sections starts. */
7116 s = bfd_get_section_by_name (obfd, ".got");
7117 if (s == NULL)
7118 s = bfd_get_section_by_name (obfd, ".toc");
7119 if (s == NULL)
7120 s = bfd_get_section_by_name (obfd, ".tocbss");
7121 if (s == NULL)
7122 s = bfd_get_section_by_name (obfd, ".plt");
7123 if (s == NULL)
7124 {
7125 /* This may happen for
7126 o references to TOC base (SYM@toc / TOC[tc0]) without a
7127 .toc directive
7128 o bad linker script
7129 o --gc-sections and empty TOC sections
7130
7131 FIXME: Warn user? */
7132
7133 /* Look for a likely section. We probably won't even be
7134 using TOCstart. */
7135 for (s = obfd->sections; s != NULL; s = s->next)
7136 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
7137 == (SEC_ALLOC | SEC_SMALL_DATA))
7138 break;
7139 if (s == NULL)
7140 for (s = obfd->sections; s != NULL; s = s->next)
7141 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
7142 == (SEC_ALLOC | SEC_SMALL_DATA))
7143 break;
7144 if (s == NULL)
7145 for (s = obfd->sections; s != NULL; s = s->next)
7146 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
7147 break;
7148 if (s == NULL)
7149 for (s = obfd->sections; s != NULL; s = s->next)
7150 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
7151 break;
7152 }
7153
7154 TOCstart = 0;
7155 if (s != NULL)
7156 TOCstart = s->output_section->vma + s->output_offset;
7157
7158 return TOCstart;
7159 }
7160
7161 /* Build all the stubs associated with the current output file.
7162 The stubs are kept in a hash table attached to the main linker
7163 hash table. This function is called via gldelf64ppc_finish. */
7164
7165 bfd_boolean
7166 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
7167 struct bfd_link_info *info,
7168 char **stats)
7169 {
7170 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7171 asection *stub_sec;
7172 bfd_byte *p;
7173 int stub_sec_count = 0;
7174
7175 htab->emit_stub_syms = emit_stub_syms;
7176 for (stub_sec = htab->stub_bfd->sections;
7177 stub_sec != NULL;
7178 stub_sec = stub_sec->next)
7179 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7180 {
7181 bfd_size_type size;
7182
7183 /* Allocate memory to hold the linker stubs. */
7184 size = stub_sec->_raw_size;
7185 if (size != 0)
7186 {
7187 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
7188 if (stub_sec->contents == NULL)
7189 return FALSE;
7190 }
7191 stub_sec->_cooked_size = 0;
7192 }
7193
7194 if (htab->plt != NULL)
7195 {
7196 unsigned int indx;
7197 bfd_vma plt0;
7198
7199 /* Build the .glink plt call stub. */
7200 plt0 = (htab->plt->output_section->vma
7201 + htab->plt->output_offset
7202 - (htab->glink->output_section->vma
7203 + htab->glink->output_offset
7204 + GLINK_CALL_STUB_SIZE));
7205 if (plt0 + 0x80008000 > 0xffffffff)
7206 {
7207 (*_bfd_error_handler) (_(".glink and .plt too far apart"));
7208 bfd_set_error (bfd_error_bad_value);
7209 return FALSE;
7210 }
7211
7212 if (htab->emit_stub_syms)
7213 {
7214 struct elf_link_hash_entry *h;
7215 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
7216 if (h == NULL)
7217 return FALSE;
7218 if (h->root.type == bfd_link_hash_new)
7219 {
7220 h->root.type = bfd_link_hash_defined;
7221 h->root.u.def.section = htab->glink;
7222 h->root.u.def.value = 0;
7223 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR
7224 | ELF_LINK_HASH_DEF_REGULAR
7225 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
7226 | ELF_LINK_FORCED_LOCAL);
7227 }
7228 }
7229 p = htab->glink->contents;
7230 bfd_put_32 (htab->glink->owner, MFCTR_R12, p);
7231 p += 4;
7232 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p);
7233 p += 4;
7234 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p);
7235 p += 4;
7236 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7237 p += 4;
7238 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p);
7239 p += 4;
7240 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p);
7241 p += 4;
7242 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p);
7243 p += 4;
7244 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p);
7245 p += 4;
7246 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p);
7247 p += 4;
7248 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p);
7249 p += 4;
7250 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p);
7251 p += 4;
7252 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p);
7253 p += 4;
7254 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
7255 p += 4;
7256 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
7257 p += 4;
7258 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
7259 p += 4;
7260 bfd_put_32 (htab->glink->owner, BCTR, p);
7261 p += 4;
7262
7263 /* Build the .glink lazy link call stubs. */
7264 indx = 0;
7265 while (p < htab->glink->contents + htab->glink->_raw_size)
7266 {
7267 if (indx < 0x8000)
7268 {
7269 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
7270 p += 4;
7271 }
7272 else
7273 {
7274 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
7275 p += 4;
7276 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
7277 p += 4;
7278 }
7279 bfd_put_32 (htab->glink->owner,
7280 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p);
7281 indx++;
7282 p += 4;
7283 }
7284 htab->glink->_cooked_size = p - htab->glink->contents;
7285 }
7286
7287 if (htab->brlt->_raw_size != 0)
7288 {
7289 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
7290 htab->brlt->_raw_size);
7291 if (htab->brlt->contents == NULL)
7292 return FALSE;
7293 }
7294 if (info->shared && htab->relbrlt->_raw_size != 0)
7295 {
7296 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
7297 htab->relbrlt->_raw_size);
7298 if (htab->relbrlt->contents == NULL)
7299 return FALSE;
7300 }
7301
7302 /* Build the stubs as directed by the stub hash table. */
7303 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
7304
7305 for (stub_sec = htab->stub_bfd->sections;
7306 stub_sec != NULL;
7307 stub_sec = stub_sec->next)
7308 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
7309 {
7310 stub_sec_count += 1;
7311 if (stub_sec->_raw_size != stub_sec->_cooked_size)
7312 break;
7313 }
7314
7315 if (stub_sec != NULL
7316 || htab->glink->_raw_size != htab->glink->_cooked_size)
7317 {
7318 htab->stub_error = TRUE;
7319 (*_bfd_error_handler) (_("stubs don't match calculated size"));
7320 }
7321
7322 if (htab->stub_error)
7323 return FALSE;
7324
7325 if (stats != NULL)
7326 {
7327 *stats = bfd_malloc (500);
7328 if (*stats == NULL)
7329 return FALSE;
7330
7331 sprintf (*stats, _("linker stubs in %u groups\n"
7332 " branch %lu\n"
7333 " toc adjust %lu\n"
7334 " long branch %lu\n"
7335 " long toc adj %lu\n"
7336 " plt call %lu"),
7337 stub_sec_count,
7338 htab->stub_count[ppc_stub_long_branch - 1],
7339 htab->stub_count[ppc_stub_long_branch_r2off - 1],
7340 htab->stub_count[ppc_stub_plt_branch - 1],
7341 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
7342 htab->stub_count[ppc_stub_plt_call - 1]);
7343 }
7344 return TRUE;
7345 }
7346
7347 /* The RELOCATE_SECTION function is called by the ELF backend linker
7348 to handle the relocations for a section.
7349
7350 The relocs are always passed as Rela structures; if the section
7351 actually uses Rel structures, the r_addend field will always be
7352 zero.
7353
7354 This function is responsible for adjust the section contents as
7355 necessary, and (if using Rela relocs and generating a
7356 relocatable output file) adjusting the reloc addend as
7357 necessary.
7358
7359 This function does not have to worry about setting the reloc
7360 address or the reloc symbol index.
7361
7362 LOCAL_SYMS is a pointer to the swapped in local symbols.
7363
7364 LOCAL_SECTIONS is an array giving the section in the input file
7365 corresponding to the st_shndx field of each local symbol.
7366
7367 The global hash table entry for the global symbols can be found
7368 via elf_sym_hashes (input_bfd).
7369
7370 When generating relocatable output, this function must handle
7371 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7372 going to be the section symbol corresponding to the output
7373 section, which means that the addend must be adjusted
7374 accordingly. */
7375
7376 static bfd_boolean
7377 ppc64_elf_relocate_section (bfd *output_bfd,
7378 struct bfd_link_info *info,
7379 bfd *input_bfd,
7380 asection *input_section,
7381 bfd_byte *contents,
7382 Elf_Internal_Rela *relocs,
7383 Elf_Internal_Sym *local_syms,
7384 asection **local_sections)
7385 {
7386 struct ppc_link_hash_table *htab;
7387 Elf_Internal_Shdr *symtab_hdr;
7388 struct elf_link_hash_entry **sym_hashes;
7389 Elf_Internal_Rela *rel;
7390 Elf_Internal_Rela *relend;
7391 Elf_Internal_Rela outrel;
7392 bfd_byte *loc;
7393 struct got_entry **local_got_ents;
7394 bfd_vma TOCstart;
7395 bfd_boolean ret = TRUE;
7396 bfd_boolean is_opd;
7397 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
7398 bfd_boolean is_power4 = FALSE;
7399
7400 if (info->relocatable)
7401 return TRUE;
7402
7403 /* Initialize howto table if needed. */
7404 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
7405 ppc_howto_init ();
7406
7407 htab = ppc_hash_table (info);
7408 local_got_ents = elf_local_got_ents (input_bfd);
7409 TOCstart = elf_gp (output_bfd);
7410 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
7411 sym_hashes = elf_sym_hashes (input_bfd);
7412 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL;
7413
7414 rel = relocs;
7415 relend = relocs + input_section->reloc_count;
7416 for (; rel < relend; rel++)
7417 {
7418 enum elf_ppc64_reloc_type r_type;
7419 bfd_vma addend;
7420 bfd_reloc_status_type r;
7421 Elf_Internal_Sym *sym;
7422 asection *sec;
7423 struct elf_link_hash_entry *h;
7424 struct elf_link_hash_entry *fdh;
7425 const char *sym_name;
7426 unsigned long r_symndx, toc_symndx;
7427 char tls_mask, tls_gd, tls_type;
7428 char sym_type;
7429 bfd_vma relocation;
7430 bfd_boolean unresolved_reloc;
7431 bfd_boolean warned;
7432 unsigned long insn, mask;
7433 struct ppc_stub_hash_entry *stub_entry;
7434 bfd_vma max_br_offset;
7435 bfd_vma from;
7436
7437 r_type = ELF64_R_TYPE (rel->r_info);
7438 r_symndx = ELF64_R_SYM (rel->r_info);
7439
7440 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
7441 symbol of the previous ADDR64 reloc. The symbol gives us the
7442 proper TOC base to use. */
7443 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
7444 && rel != relocs
7445 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
7446 && is_opd)
7447 r_symndx = ELF64_R_SYM (rel[-1].r_info);
7448
7449 sym = NULL;
7450 sec = NULL;
7451 h = NULL;
7452 sym_name = NULL;
7453 unresolved_reloc = FALSE;
7454 warned = FALSE;
7455
7456 if (r_symndx < symtab_hdr->sh_info)
7457 {
7458 /* It's a local symbol. */
7459 sym = local_syms + r_symndx;
7460 sec = local_sections[r_symndx];
7461 sym_name = bfd_elf_local_sym_name (input_bfd, sym);
7462 sym_type = ELF64_ST_TYPE (sym->st_info);
7463 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7464 if (elf_section_data (sec) != NULL)
7465 {
7466 long *opd_sym_adjust;
7467
7468 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust;
7469 if (opd_sym_adjust != NULL)
7470 relocation += opd_sym_adjust[sym->st_value / 24];
7471 }
7472 }
7473 else
7474 {
7475 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
7476 symtab_hdr, relocation, sec,
7477 unresolved_reloc, info,
7478 warned);
7479 sym_name = h->root.root.string;
7480 sym_type = h->type;
7481 }
7482
7483 /* TLS optimizations. Replace instruction sequences and relocs
7484 based on information we collected in tls_optimize. We edit
7485 RELOCS so that --emit-relocs will output something sensible
7486 for the final instruction stream. */
7487 tls_mask = 0;
7488 tls_gd = 0;
7489 toc_symndx = 0;
7490 if (IS_PPC64_TLS_RELOC (r_type))
7491 {
7492 if (h != NULL)
7493 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask;
7494 else if (local_got_ents != NULL)
7495 {
7496 char *lgot_masks;
7497 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
7498 tls_mask = lgot_masks[r_symndx];
7499 }
7500 if (tls_mask == 0 && r_type == R_PPC64_TLS)
7501 {
7502 /* Check for toc tls entries. */
7503 char *toc_tls;
7504
7505 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7506 rel, input_bfd))
7507 return FALSE;
7508
7509 if (toc_tls)
7510 tls_mask = *toc_tls;
7511 }
7512 }
7513
7514 /* Check that tls relocs are used with tls syms, and non-tls
7515 relocs are used with non-tls syms. */
7516 if (r_symndx != 0
7517 && r_type != R_PPC64_NONE
7518 && (h == NULL
7519 || h->root.type == bfd_link_hash_defined
7520 || h->root.type == bfd_link_hash_defweak)
7521 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
7522 {
7523 if (r_type == R_PPC64_TLS && tls_mask != 0)
7524 /* R_PPC64_TLS is OK against a symbol in the TOC. */
7525 ;
7526 else
7527 (*_bfd_error_handler)
7528 (sym_type == STT_TLS
7529 ? _("%s(%s+0x%lx): %s used with TLS symbol %s")
7530 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"),
7531 bfd_archive_filename (input_bfd),
7532 input_section->name,
7533 (long) rel->r_offset,
7534 ppc64_elf_howto_table[r_type]->name,
7535 sym_name);
7536 }
7537
7538 /* Ensure reloc mapping code below stays sane. */
7539 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
7540 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
7541 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
7542 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
7543 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
7544 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
7545 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
7546 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
7547 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
7548 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
7549 abort ();
7550
7551 switch (r_type)
7552 {
7553 default:
7554 break;
7555
7556 case R_PPC64_TOC16:
7557 case R_PPC64_TOC16_LO:
7558 case R_PPC64_TOC16_DS:
7559 case R_PPC64_TOC16_LO_DS:
7560 {
7561 /* Check for toc tls entries. */
7562 char *toc_tls;
7563 int retval;
7564
7565 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
7566 rel, input_bfd);
7567 if (retval == 0)
7568 return FALSE;
7569
7570 if (toc_tls)
7571 {
7572 tls_mask = *toc_tls;
7573 if (r_type == R_PPC64_TOC16_DS
7574 || r_type == R_PPC64_TOC16_LO_DS)
7575 {
7576 if (tls_mask != 0
7577 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
7578 goto toctprel;
7579 }
7580 else
7581 {
7582 /* If we found a GD reloc pair, then we might be
7583 doing a GD->IE transition. */
7584 if (retval == 2)
7585 {
7586 tls_gd = TLS_TPRELGD;
7587 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7588 goto tls_get_addr_check;
7589 }
7590 else if (retval == 3)
7591 {
7592 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7593 goto tls_get_addr_check;
7594 }
7595 }
7596 }
7597 }
7598 break;
7599
7600 case R_PPC64_GOT_TPREL16_DS:
7601 case R_PPC64_GOT_TPREL16_LO_DS:
7602 if (tls_mask != 0
7603 && (tls_mask & TLS_TPREL) == 0)
7604 {
7605 toctprel:
7606 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
7607 insn &= 31 << 21;
7608 insn |= 0x3c0d0000; /* addis 0,13,0 */
7609 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
7610 r_type = R_PPC64_TPREL16_HA;
7611 if (toc_symndx != 0)
7612 {
7613 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7614 /* We changed the symbol. Start over in order to
7615 get h, sym, sec etc. right. */
7616 rel--;
7617 continue;
7618 }
7619 else
7620 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7621 }
7622 break;
7623
7624 case R_PPC64_TLS:
7625 if (tls_mask != 0
7626 && (tls_mask & TLS_TPREL) == 0)
7627 {
7628 bfd_vma rtra;
7629 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7630 if ((insn & ((0x3f << 26) | (31 << 11)))
7631 == ((31 << 26) | (13 << 11)))
7632 rtra = insn & ((1 << 26) - (1 << 16));
7633 else if ((insn & ((0x3f << 26) | (31 << 16)))
7634 == ((31 << 26) | (13 << 16)))
7635 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
7636 else
7637 abort ();
7638 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
7639 /* add -> addi. */
7640 insn = 14 << 26;
7641 else if ((insn & (31 << 1)) == 23 << 1
7642 && ((insn & (31 << 6)) < 14 << 6
7643 || ((insn & (31 << 6)) >= 16 << 6
7644 && (insn & (31 << 6)) < 24 << 6)))
7645 /* load and store indexed -> dform. */
7646 insn = (32 | ((insn >> 6) & 31)) << 26;
7647 else if ((insn & (31 << 1)) == 21 << 1
7648 && (insn & (0x1a << 6)) == 0)
7649 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7650 insn = (((58 | ((insn >> 6) & 4)) << 26)
7651 | ((insn >> 6) & 1));
7652 else if ((insn & (31 << 1)) == 21 << 1
7653 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
7654 /* lwax -> lwa. */
7655 insn = (58 << 26) | 2;
7656 else
7657 abort ();
7658 insn |= rtra;
7659 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7660 /* Was PPC64_TLS which sits on insn boundary, now
7661 PPC64_TPREL16_LO which is at insn+2. */
7662 rel->r_offset += 2;
7663 r_type = R_PPC64_TPREL16_LO;
7664 if (toc_symndx != 0)
7665 {
7666 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
7667 /* We changed the symbol. Start over in order to
7668 get h, sym, sec etc. right. */
7669 rel--;
7670 continue;
7671 }
7672 else
7673 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7674 }
7675 break;
7676
7677 case R_PPC64_GOT_TLSGD16_HI:
7678 case R_PPC64_GOT_TLSGD16_HA:
7679 tls_gd = TLS_TPRELGD;
7680 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7681 goto tls_gdld_hi;
7682 break;
7683
7684 case R_PPC64_GOT_TLSLD16_HI:
7685 case R_PPC64_GOT_TLSLD16_HA:
7686 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7687 {
7688 tls_gdld_hi:
7689 if ((tls_mask & tls_gd) != 0)
7690 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7691 + R_PPC64_GOT_TPREL16_DS);
7692 else
7693 {
7694 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7695 rel->r_offset -= 2;
7696 r_type = R_PPC64_NONE;
7697 }
7698 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7699 }
7700 break;
7701
7702 case R_PPC64_GOT_TLSGD16:
7703 case R_PPC64_GOT_TLSGD16_LO:
7704 tls_gd = TLS_TPRELGD;
7705 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
7706 goto tls_get_addr_check;
7707 break;
7708
7709 case R_PPC64_GOT_TLSLD16:
7710 case R_PPC64_GOT_TLSLD16_LO:
7711 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
7712 {
7713 tls_get_addr_check:
7714 if (rel + 1 < relend)
7715 {
7716 enum elf_ppc64_reloc_type r_type2;
7717 unsigned long r_symndx2;
7718 struct elf_link_hash_entry *h2;
7719 bfd_vma insn1, insn2, insn3;
7720 bfd_vma offset;
7721
7722 /* The next instruction should be a call to
7723 __tls_get_addr. Peek at the reloc to be sure. */
7724 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7725 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7726 if (r_symndx2 < symtab_hdr->sh_info
7727 || (r_type2 != R_PPC64_REL14
7728 && r_type2 != R_PPC64_REL14_BRTAKEN
7729 && r_type2 != R_PPC64_REL14_BRNTAKEN
7730 && r_type2 != R_PPC64_REL24))
7731 break;
7732
7733 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7734 while (h2->root.type == bfd_link_hash_indirect
7735 || h2->root.type == bfd_link_hash_warning)
7736 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
7737 if (h2 == NULL || h2 != htab->tls_get_addr)
7738 break;
7739
7740 /* OK, it checks out. Replace the call. */
7741 offset = rel[1].r_offset;
7742 insn1 = bfd_get_32 (output_bfd,
7743 contents + rel->r_offset - 2);
7744 insn3 = bfd_get_32 (output_bfd,
7745 contents + offset + 4);
7746 if ((tls_mask & tls_gd) != 0)
7747 {
7748 /* IE */
7749 insn1 &= (1 << 26) - (1 << 2);
7750 insn1 |= 58 << 26; /* ld */
7751 insn2 = 0x7c636a14; /* add 3,3,13 */
7752 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE);
7753 if ((tls_mask & TLS_EXPLICIT) == 0)
7754 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
7755 + R_PPC64_GOT_TPREL16_DS);
7756 else
7757 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
7758 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7759 }
7760 else
7761 {
7762 /* LE */
7763 insn1 = 0x3c6d0000; /* addis 3,13,0 */
7764 insn2 = 0x38630000; /* addi 3,3,0 */
7765 if (tls_gd == 0)
7766 {
7767 /* Was an LD reloc. */
7768 r_symndx = 0;
7769 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7770 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7771 }
7772 else if (toc_symndx != 0)
7773 r_symndx = toc_symndx;
7774 r_type = R_PPC64_TPREL16_HA;
7775 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7776 rel[1].r_info = ELF64_R_INFO (r_symndx,
7777 R_PPC64_TPREL16_LO);
7778 rel[1].r_offset += 2;
7779 }
7780 if (insn3 == NOP
7781 || insn3 == CROR_151515 || insn3 == CROR_313131)
7782 {
7783 insn3 = insn2;
7784 insn2 = NOP;
7785 rel[1].r_offset += 4;
7786 }
7787 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
7788 bfd_put_32 (output_bfd, insn2, contents + offset);
7789 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
7790 if (tls_gd == 0 || toc_symndx != 0)
7791 {
7792 /* We changed the symbol. Start over in order
7793 to get h, sym, sec etc. right. */
7794 rel--;
7795 continue;
7796 }
7797 }
7798 }
7799 break;
7800
7801 case R_PPC64_DTPMOD64:
7802 if (rel + 1 < relend
7803 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
7804 && rel[1].r_offset == rel->r_offset + 8)
7805 {
7806 if ((tls_mask & TLS_GD) == 0)
7807 {
7808 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
7809 if ((tls_mask & TLS_TPRELGD) != 0)
7810 r_type = R_PPC64_TPREL64;
7811 else
7812 {
7813 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7814 r_type = R_PPC64_NONE;
7815 }
7816 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7817 }
7818 }
7819 else
7820 {
7821 if ((tls_mask & TLS_LD) == 0)
7822 {
7823 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
7824 r_type = R_PPC64_NONE;
7825 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7826 }
7827 }
7828 break;
7829
7830 case R_PPC64_TPREL64:
7831 if ((tls_mask & TLS_TPREL) == 0)
7832 {
7833 r_type = R_PPC64_NONE;
7834 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
7835 }
7836 break;
7837 }
7838
7839 /* Handle other relocations that tweak non-addend part of insn. */
7840 insn = 0;
7841 switch (r_type)
7842 {
7843 default:
7844 break;
7845
7846 /* Branch taken prediction relocations. */
7847 case R_PPC64_ADDR14_BRTAKEN:
7848 case R_PPC64_REL14_BRTAKEN:
7849 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
7850 /* Fall thru. */
7851
7852 /* Branch not taken prediction relocations. */
7853 case R_PPC64_ADDR14_BRNTAKEN:
7854 case R_PPC64_REL14_BRNTAKEN:
7855 insn |= bfd_get_32 (output_bfd,
7856 contents + rel->r_offset) & ~(0x01 << 21);
7857 if (is_power4)
7858 {
7859 /* Set 'a' bit. This is 0b00010 in BO field for branch
7860 on CR(BI) insns (BO == 001at or 011at), and 0b01000
7861 for branch on CTR insns (BO == 1a00t or 1a01t). */
7862 if ((insn & (0x14 << 21)) == (0x04 << 21))
7863 insn |= 0x02 << 21;
7864 else if ((insn & (0x14 << 21)) == (0x10 << 21))
7865 insn |= 0x08 << 21;
7866 else
7867 break;
7868 }
7869 else
7870 {
7871 from = (rel->r_offset
7872 + input_section->output_offset
7873 + input_section->output_section->vma);
7874
7875 /* Invert 'y' bit if not the default. */
7876 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7877 insn ^= 0x01 << 21;
7878 }
7879
7880 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7881 break;
7882
7883 case R_PPC64_REL24:
7884 /* Calls to functions with a different TOC, such as calls to
7885 shared objects, need to alter the TOC pointer. This is
7886 done using a linkage stub. A REL24 branching to these
7887 linkage stubs needs to be followed by a nop, as the nop
7888 will be replaced with an instruction to restore the TOC
7889 base pointer. */
7890 if (((h != NULL
7891 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
7892 && fdh->plt.plist != NULL)
7893 || ((fdh = h, sec) != NULL
7894 && sec->output_section != NULL
7895 && (htab->stub_group[sec->id].toc_off
7896 != htab->stub_group[input_section->id].toc_off)))
7897 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
7898 rel, htab)) != NULL
7899 && (stub_entry->stub_type == ppc_stub_plt_call
7900 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
7901 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
7902 {
7903 bfd_boolean can_plt_call = 0;
7904
7905 if (rel->r_offset + 8 <= input_section->_cooked_size)
7906 {
7907 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
7908 if (insn == NOP
7909 || insn == CROR_151515 || insn == CROR_313131)
7910 {
7911 bfd_put_32 (input_bfd, LD_R2_40R1,
7912 contents + rel->r_offset + 4);
7913 can_plt_call = 1;
7914 }
7915 }
7916
7917 if (!can_plt_call)
7918 {
7919 if (stub_entry->stub_type == ppc_stub_plt_call)
7920 {
7921 /* If this is a plain branch rather than a branch
7922 and link, don't require a nop. */
7923 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7924 if ((insn & 1) == 0)
7925 can_plt_call = 1;
7926 }
7927 else if (h != NULL
7928 && strcmp (h->root.root.string,
7929 ".__libc_start_main") == 0)
7930 {
7931 /* Allow crt1 branch to go via a toc adjusting stub. */
7932 can_plt_call = 1;
7933 }
7934 else
7935 {
7936 if (strcmp (input_section->output_section->name,
7937 ".init") == 0
7938 || strcmp (input_section->output_section->name,
7939 ".fini") == 0)
7940 (*_bfd_error_handler)
7941 (_("%s(%s+0x%lx): automatic multiple TOCs "
7942 "not supported using your crt files; "
7943 "recompile with -mminimal-toc or upgrade gcc"),
7944 bfd_archive_filename (input_bfd),
7945 input_section->name,
7946 (long) rel->r_offset);
7947 else
7948 (*_bfd_error_handler)
7949 (_("%s(%s+0x%lx): sibling call optimization to `%s' "
7950 "does not allow automatic multiple TOCs; "
7951 "recompile with -mminimal-toc or "
7952 "-fno-optimize-sibling-calls, "
7953 "or make `%s' extern"),
7954 bfd_archive_filename (input_bfd),
7955 input_section->name,
7956 (long) rel->r_offset,
7957 sym_name,
7958 sym_name);
7959 bfd_set_error (bfd_error_bad_value);
7960 ret = FALSE;
7961 }
7962 }
7963
7964 if (can_plt_call)
7965 {
7966 relocation = (stub_entry->stub_offset
7967 + stub_entry->stub_sec->output_offset
7968 + stub_entry->stub_sec->output_section->vma);
7969 if (stub_entry->stub_type == ppc_stub_plt_call)
7970 unresolved_reloc = FALSE;
7971 }
7972 }
7973
7974 if (h != NULL
7975 && h->root.type == bfd_link_hash_undefweak
7976 && relocation == 0
7977 && rel->r_addend == 0)
7978 {
7979 /* Tweak calls to undefined weak functions to point at a
7980 blr. We can thus call a weak function without first
7981 checking whether the function is defined. We have a
7982 blr at the end of .sfpr. */
7983 BFD_ASSERT (htab->sfpr->_raw_size != 0);
7984 relocation = (htab->sfpr->_raw_size - 4
7985 + htab->sfpr->output_offset
7986 + htab->sfpr->output_section->vma);
7987 from = (rel->r_offset
7988 + input_section->output_offset
7989 + input_section->output_section->vma);
7990
7991 /* But let's not be silly about it. If the blr isn't in
7992 reach, just go to the next instruction. */
7993 if (relocation - from + (1 << 25) >= (1 << 26)
7994 || htab->sfpr->_raw_size == 0)
7995 relocation = from + 4;
7996 }
7997 break;
7998 }
7999
8000 /* Set `addend'. */
8001 tls_type = 0;
8002 addend = rel->r_addend;
8003 switch (r_type)
8004 {
8005 default:
8006 (*_bfd_error_handler)
8007 (_("%s: unknown relocation type %d for symbol %s"),
8008 bfd_archive_filename (input_bfd), (int) r_type, sym_name);
8009
8010 bfd_set_error (bfd_error_bad_value);
8011 ret = FALSE;
8012 continue;
8013
8014 case R_PPC64_NONE:
8015 case R_PPC64_TLS:
8016 case R_PPC64_GNU_VTINHERIT:
8017 case R_PPC64_GNU_VTENTRY:
8018 continue;
8019
8020 /* GOT16 relocations. Like an ADDR16 using the symbol's
8021 address in the GOT as relocation value instead of the
8022 symbol's value itself. Also, create a GOT entry for the
8023 symbol and put the symbol value there. */
8024 case R_PPC64_GOT_TLSGD16:
8025 case R_PPC64_GOT_TLSGD16_LO:
8026 case R_PPC64_GOT_TLSGD16_HI:
8027 case R_PPC64_GOT_TLSGD16_HA:
8028 tls_type = TLS_TLS | TLS_GD;
8029 goto dogot;
8030
8031 case R_PPC64_GOT_TLSLD16:
8032 case R_PPC64_GOT_TLSLD16_LO:
8033 case R_PPC64_GOT_TLSLD16_HI:
8034 case R_PPC64_GOT_TLSLD16_HA:
8035 tls_type = TLS_TLS | TLS_LD;
8036 goto dogot;
8037
8038 case R_PPC64_GOT_TPREL16_DS:
8039 case R_PPC64_GOT_TPREL16_LO_DS:
8040 case R_PPC64_GOT_TPREL16_HI:
8041 case R_PPC64_GOT_TPREL16_HA:
8042 tls_type = TLS_TLS | TLS_TPREL;
8043 goto dogot;
8044
8045 case R_PPC64_GOT_DTPREL16_DS:
8046 case R_PPC64_GOT_DTPREL16_LO_DS:
8047 case R_PPC64_GOT_DTPREL16_HI:
8048 case R_PPC64_GOT_DTPREL16_HA:
8049 tls_type = TLS_TLS | TLS_DTPREL;
8050 goto dogot;
8051
8052 case R_PPC64_GOT16:
8053 case R_PPC64_GOT16_LO:
8054 case R_PPC64_GOT16_HI:
8055 case R_PPC64_GOT16_HA:
8056 case R_PPC64_GOT16_DS:
8057 case R_PPC64_GOT16_LO_DS:
8058 dogot:
8059 {
8060 /* Relocation is to the entry for this symbol in the global
8061 offset table. */
8062 asection *got;
8063 bfd_vma *offp;
8064 bfd_vma off;
8065 unsigned long indx = 0;
8066
8067 if (tls_type == (TLS_TLS | TLS_LD)
8068 && (h == NULL
8069 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
8070 offp = &ppc64_tlsld_got (input_bfd)->offset;
8071 else
8072 {
8073 struct got_entry *ent;
8074
8075 if (h != NULL)
8076 {
8077 bfd_boolean dyn = htab->elf.dynamic_sections_created;
8078 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8079 || (info->shared
8080 && SYMBOL_REFERENCES_LOCAL (info, h)))
8081 /* This is actually a static link, or it is a
8082 -Bsymbolic link and the symbol is defined
8083 locally, or the symbol was forced to be local
8084 because of a version file. */
8085 ;
8086 else
8087 {
8088 indx = h->dynindx;
8089 unresolved_reloc = FALSE;
8090 }
8091 ent = h->got.glist;
8092 }
8093 else
8094 {
8095 if (local_got_ents == NULL)
8096 abort ();
8097 ent = local_got_ents[r_symndx];
8098 }
8099
8100 for (; ent != NULL; ent = ent->next)
8101 if (ent->addend == rel->r_addend
8102 && ent->owner == input_bfd
8103 && ent->tls_type == tls_type)
8104 break;
8105 if (ent == NULL)
8106 abort ();
8107 offp = &ent->got.offset;
8108 }
8109
8110 got = ppc64_elf_tdata (input_bfd)->got;
8111 if (got == NULL)
8112 abort ();
8113
8114 /* The offset must always be a multiple of 8. We use the
8115 least significant bit to record whether we have already
8116 processed this entry. */
8117 off = *offp;
8118 if ((off & 1) != 0)
8119 off &= ~1;
8120 else
8121 {
8122 /* Generate relocs for the dynamic linker, except in
8123 the case of TLSLD where we'll use one entry per
8124 module. */
8125 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
8126
8127 *offp = off | 1;
8128 if ((info->shared || indx != 0)
8129 && (h == NULL
8130 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8131 || h->root.type != bfd_link_hash_undefweak))
8132 {
8133 outrel.r_offset = (got->output_section->vma
8134 + got->output_offset
8135 + off);
8136 outrel.r_addend = rel->r_addend;
8137 if (tls_type & (TLS_LD | TLS_GD))
8138 {
8139 outrel.r_addend = 0;
8140 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
8141 if (tls_type == (TLS_TLS | TLS_GD))
8142 {
8143 loc = relgot->contents;
8144 loc += (relgot->reloc_count++
8145 * sizeof (Elf64_External_Rela));
8146 bfd_elf64_swap_reloca_out (output_bfd,
8147 &outrel, loc);
8148 outrel.r_offset += 8;
8149 outrel.r_addend = rel->r_addend;
8150 outrel.r_info
8151 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8152 }
8153 }
8154 else if (tls_type == (TLS_TLS | TLS_DTPREL))
8155 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
8156 else if (tls_type == (TLS_TLS | TLS_TPREL))
8157 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
8158 else if (indx == 0)
8159 {
8160 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
8161
8162 /* Write the .got section contents for the sake
8163 of prelink. */
8164 loc = got->contents + off;
8165 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
8166 loc);
8167 }
8168 else
8169 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
8170
8171 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
8172 {
8173 outrel.r_addend += relocation;
8174 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8175 outrel.r_addend -= htab->elf.tls_sec->vma;
8176 }
8177 loc = relgot->contents;
8178 loc += (relgot->reloc_count++
8179 * sizeof (Elf64_External_Rela));
8180 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8181 }
8182
8183 /* Init the .got section contents here if we're not
8184 emitting a reloc. */
8185 else
8186 {
8187 relocation += rel->r_addend;
8188 if (tls_type == (TLS_TLS | TLS_LD))
8189 relocation = 1;
8190 else if (tls_type != 0)
8191 {
8192 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
8193 if (tls_type == (TLS_TLS | TLS_TPREL))
8194 relocation += DTP_OFFSET - TP_OFFSET;
8195
8196 if (tls_type == (TLS_TLS | TLS_GD))
8197 {
8198 bfd_put_64 (output_bfd, relocation,
8199 got->contents + off + 8);
8200 relocation = 1;
8201 }
8202 }
8203
8204 bfd_put_64 (output_bfd, relocation,
8205 got->contents + off);
8206 }
8207 }
8208
8209 if (off >= (bfd_vma) -2)
8210 abort ();
8211
8212 relocation = got->output_offset + off;
8213
8214 /* TOC base (r2) is TOC start plus 0x8000. */
8215 addend = -TOC_BASE_OFF;
8216 }
8217 break;
8218
8219 case R_PPC64_PLT16_HA:
8220 case R_PPC64_PLT16_HI:
8221 case R_PPC64_PLT16_LO:
8222 case R_PPC64_PLT32:
8223 case R_PPC64_PLT64:
8224 /* Relocation is to the entry for this symbol in the
8225 procedure linkage table. */
8226
8227 /* Resolve a PLT reloc against a local symbol directly,
8228 without using the procedure linkage table. */
8229 if (h == NULL)
8230 break;
8231
8232 /* It's possible that we didn't make a PLT entry for this
8233 symbol. This happens when statically linking PIC code,
8234 or when using -Bsymbolic. Go find a match if there is a
8235 PLT entry. */
8236 if (htab->plt != NULL)
8237 {
8238 struct plt_entry *ent;
8239 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8240 if (ent->addend == rel->r_addend
8241 && ent->plt.offset != (bfd_vma) -1)
8242 {
8243 relocation = (htab->plt->output_section->vma
8244 + htab->plt->output_offset
8245 + ent->plt.offset);
8246 unresolved_reloc = FALSE;
8247 }
8248 }
8249 break;
8250
8251 case R_PPC64_TOC:
8252 /* Relocation value is TOC base. */
8253 relocation = TOCstart;
8254 if (r_symndx == 0)
8255 relocation += htab->stub_group[input_section->id].toc_off;
8256 else if (unresolved_reloc)
8257 ;
8258 else if (sec != NULL && sec->id <= htab->top_id)
8259 relocation += htab->stub_group[sec->id].toc_off;
8260 else
8261 unresolved_reloc = TRUE;
8262 goto dodyn2;
8263
8264 /* TOC16 relocs. We want the offset relative to the TOC base,
8265 which is the address of the start of the TOC plus 0x8000.
8266 The TOC consists of sections .got, .toc, .tocbss, and .plt,
8267 in this order. */
8268 case R_PPC64_TOC16:
8269 case R_PPC64_TOC16_LO:
8270 case R_PPC64_TOC16_HI:
8271 case R_PPC64_TOC16_DS:
8272 case R_PPC64_TOC16_LO_DS:
8273 case R_PPC64_TOC16_HA:
8274 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
8275 break;
8276
8277 /* Relocate against the beginning of the section. */
8278 case R_PPC64_SECTOFF:
8279 case R_PPC64_SECTOFF_LO:
8280 case R_PPC64_SECTOFF_HI:
8281 case R_PPC64_SECTOFF_DS:
8282 case R_PPC64_SECTOFF_LO_DS:
8283 case R_PPC64_SECTOFF_HA:
8284 if (sec != NULL)
8285 addend -= sec->output_section->vma;
8286 break;
8287
8288 case R_PPC64_REL14:
8289 case R_PPC64_REL14_BRNTAKEN:
8290 case R_PPC64_REL14_BRTAKEN:
8291 case R_PPC64_REL24:
8292 break;
8293
8294 case R_PPC64_TPREL16:
8295 case R_PPC64_TPREL16_LO:
8296 case R_PPC64_TPREL16_HI:
8297 case R_PPC64_TPREL16_HA:
8298 case R_PPC64_TPREL16_DS:
8299 case R_PPC64_TPREL16_LO_DS:
8300 case R_PPC64_TPREL16_HIGHER:
8301 case R_PPC64_TPREL16_HIGHERA:
8302 case R_PPC64_TPREL16_HIGHEST:
8303 case R_PPC64_TPREL16_HIGHESTA:
8304 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8305 if (info->shared)
8306 /* The TPREL16 relocs shouldn't really be used in shared
8307 libs as they will result in DT_TEXTREL being set, but
8308 support them anyway. */
8309 goto dodyn;
8310 break;
8311
8312 case R_PPC64_DTPREL16:
8313 case R_PPC64_DTPREL16_LO:
8314 case R_PPC64_DTPREL16_HI:
8315 case R_PPC64_DTPREL16_HA:
8316 case R_PPC64_DTPREL16_DS:
8317 case R_PPC64_DTPREL16_LO_DS:
8318 case R_PPC64_DTPREL16_HIGHER:
8319 case R_PPC64_DTPREL16_HIGHERA:
8320 case R_PPC64_DTPREL16_HIGHEST:
8321 case R_PPC64_DTPREL16_HIGHESTA:
8322 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8323 break;
8324
8325 case R_PPC64_DTPMOD64:
8326 relocation = 1;
8327 addend = 0;
8328 goto dodyn;
8329
8330 case R_PPC64_TPREL64:
8331 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8332 goto dodyn;
8333
8334 case R_PPC64_DTPREL64:
8335 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8336 /* Fall thru */
8337
8338 /* Relocations that may need to be propagated if this is a
8339 dynamic object. */
8340 case R_PPC64_REL30:
8341 case R_PPC64_REL32:
8342 case R_PPC64_REL64:
8343 case R_PPC64_ADDR14:
8344 case R_PPC64_ADDR14_BRNTAKEN:
8345 case R_PPC64_ADDR14_BRTAKEN:
8346 case R_PPC64_ADDR16:
8347 case R_PPC64_ADDR16_DS:
8348 case R_PPC64_ADDR16_HA:
8349 case R_PPC64_ADDR16_HI:
8350 case R_PPC64_ADDR16_HIGHER:
8351 case R_PPC64_ADDR16_HIGHERA:
8352 case R_PPC64_ADDR16_HIGHEST:
8353 case R_PPC64_ADDR16_HIGHESTA:
8354 case R_PPC64_ADDR16_LO:
8355 case R_PPC64_ADDR16_LO_DS:
8356 case R_PPC64_ADDR24:
8357 case R_PPC64_ADDR32:
8358 case R_PPC64_ADDR64:
8359 case R_PPC64_UADDR16:
8360 case R_PPC64_UADDR32:
8361 case R_PPC64_UADDR64:
8362 /* r_symndx will be zero only for relocs against symbols
8363 from removed linkonce sections, or sections discarded by
8364 a linker script. */
8365 dodyn:
8366 if (r_symndx == 0)
8367 break;
8368 /* Fall thru. */
8369
8370 dodyn2:
8371 if ((input_section->flags & SEC_ALLOC) == 0)
8372 break;
8373
8374 if (NO_OPD_RELOCS && is_opd)
8375 break;
8376
8377 if ((info->shared
8378 && (h == NULL
8379 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8380 || h->root.type != bfd_link_hash_undefweak)
8381 && (MUST_BE_DYN_RELOC (r_type)
8382 || !SYMBOL_CALLS_LOCAL (info, h)))
8383 || (ELIMINATE_COPY_RELOCS
8384 && !info->shared
8385 && h != NULL
8386 && h->dynindx != -1
8387 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
8388 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8389 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
8390 {
8391 Elf_Internal_Rela outrel;
8392 bfd_boolean skip, relocate;
8393 asection *sreloc;
8394 bfd_byte *loc;
8395 bfd_vma out_off;
8396
8397 /* When generating a dynamic object, these relocations
8398 are copied into the output file to be resolved at run
8399 time. */
8400
8401 skip = FALSE;
8402 relocate = FALSE;
8403
8404 out_off = _bfd_elf_section_offset (output_bfd, info,
8405 input_section, rel->r_offset);
8406 if (out_off == (bfd_vma) -1)
8407 skip = TRUE;
8408 else if (out_off == (bfd_vma) -2)
8409 skip = TRUE, relocate = TRUE;
8410 out_off += (input_section->output_section->vma
8411 + input_section->output_offset);
8412 outrel.r_offset = out_off;
8413 outrel.r_addend = rel->r_addend;
8414
8415 /* Optimize unaligned reloc use. */
8416 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
8417 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
8418 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
8419 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
8420 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
8421 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
8422 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
8423 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
8424 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
8425
8426 if (skip)
8427 memset (&outrel, 0, sizeof outrel);
8428 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
8429 && !is_opd
8430 && r_type != R_PPC64_TOC)
8431 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
8432 else
8433 {
8434 /* This symbol is local, or marked to become local,
8435 or this is an opd section reloc which must point
8436 at a local function. */
8437 outrel.r_addend += relocation;
8438 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
8439 {
8440 if (is_opd && h != NULL)
8441 {
8442 /* Lie about opd entries. This case occurs
8443 when building shared libraries and we
8444 reference a function in another shared
8445 lib. The same thing happens for a weak
8446 definition in an application that's
8447 overridden by a strong definition in a
8448 shared lib. (I believe this is a generic
8449 bug in binutils handling of weak syms.)
8450 In these cases we won't use the opd
8451 entry in this lib. */
8452 unresolved_reloc = FALSE;
8453 }
8454 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8455
8456 /* We need to relocate .opd contents for ld.so.
8457 Prelink also wants simple and consistent rules
8458 for relocs. This make all RELATIVE relocs have
8459 *r_offset equal to r_addend. */
8460 relocate = TRUE;
8461 }
8462 else
8463 {
8464 long indx = 0;
8465
8466 if (bfd_is_abs_section (sec))
8467 ;
8468 else if (sec == NULL || sec->owner == NULL)
8469 {
8470 bfd_set_error (bfd_error_bad_value);
8471 return FALSE;
8472 }
8473 else
8474 {
8475 asection *osec;
8476
8477 osec = sec->output_section;
8478 indx = elf_section_data (osec)->dynindx;
8479
8480 /* We are turning this relocation into one
8481 against a section symbol, so subtract out
8482 the output section's address but not the
8483 offset of the input section in the output
8484 section. */
8485 outrel.r_addend -= osec->vma;
8486 }
8487
8488 outrel.r_info = ELF64_R_INFO (indx, r_type);
8489 }
8490 }
8491
8492 sreloc = elf_section_data (input_section)->sreloc;
8493 if (sreloc == NULL)
8494 abort ();
8495
8496 loc = sreloc->contents;
8497 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
8498 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
8499
8500 /* If this reloc is against an external symbol, it will
8501 be computed at runtime, so there's no need to do
8502 anything now. However, for the sake of prelink ensure
8503 that the section contents are a known value. */
8504 if (! relocate)
8505 {
8506 unresolved_reloc = FALSE;
8507 /* The value chosen here is quite arbitrary as ld.so
8508 ignores section contents except for the special
8509 case of .opd where the contents might be accessed
8510 before relocation. Choose zero, as that won't
8511 cause reloc overflow. */
8512 relocation = 0;
8513 addend = 0;
8514 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
8515 to improve backward compatibility with older
8516 versions of ld. */
8517 if (r_type == R_PPC64_ADDR64)
8518 addend = outrel.r_addend;
8519 /* Adjust pc_relative relocs to have zero in *r_offset. */
8520 else if (ppc64_elf_howto_table[r_type]->pc_relative)
8521 addend = (input_section->output_section->vma
8522 + input_section->output_offset
8523 + rel->r_offset);
8524 }
8525 }
8526 break;
8527
8528 case R_PPC64_COPY:
8529 case R_PPC64_GLOB_DAT:
8530 case R_PPC64_JMP_SLOT:
8531 case R_PPC64_RELATIVE:
8532 /* We shouldn't ever see these dynamic relocs in relocatable
8533 files. */
8534 /* Fall through. */
8535
8536 case R_PPC64_PLTGOT16:
8537 case R_PPC64_PLTGOT16_DS:
8538 case R_PPC64_PLTGOT16_HA:
8539 case R_PPC64_PLTGOT16_HI:
8540 case R_PPC64_PLTGOT16_LO:
8541 case R_PPC64_PLTGOT16_LO_DS:
8542 case R_PPC64_PLTREL32:
8543 case R_PPC64_PLTREL64:
8544 /* These ones haven't been implemented yet. */
8545
8546 (*_bfd_error_handler)
8547 (_("%s: relocation %s is not supported for symbol %s."),
8548 bfd_archive_filename (input_bfd),
8549 ppc64_elf_howto_table[r_type]->name, sym_name);
8550
8551 bfd_set_error (bfd_error_invalid_operation);
8552 ret = FALSE;
8553 continue;
8554 }
8555
8556 /* Do any further special processing. */
8557 switch (r_type)
8558 {
8559 default:
8560 break;
8561
8562 case R_PPC64_ADDR16_HA:
8563 case R_PPC64_ADDR16_HIGHERA:
8564 case R_PPC64_ADDR16_HIGHESTA:
8565 case R_PPC64_GOT16_HA:
8566 case R_PPC64_PLTGOT16_HA:
8567 case R_PPC64_PLT16_HA:
8568 case R_PPC64_TOC16_HA:
8569 case R_PPC64_SECTOFF_HA:
8570 case R_PPC64_TPREL16_HA:
8571 case R_PPC64_DTPREL16_HA:
8572 case R_PPC64_GOT_TLSGD16_HA:
8573 case R_PPC64_GOT_TLSLD16_HA:
8574 case R_PPC64_GOT_TPREL16_HA:
8575 case R_PPC64_GOT_DTPREL16_HA:
8576 case R_PPC64_TPREL16_HIGHER:
8577 case R_PPC64_TPREL16_HIGHERA:
8578 case R_PPC64_TPREL16_HIGHEST:
8579 case R_PPC64_TPREL16_HIGHESTA:
8580 case R_PPC64_DTPREL16_HIGHER:
8581 case R_PPC64_DTPREL16_HIGHERA:
8582 case R_PPC64_DTPREL16_HIGHEST:
8583 case R_PPC64_DTPREL16_HIGHESTA:
8584 /* It's just possible that this symbol is a weak symbol
8585 that's not actually defined anywhere. In that case,
8586 'sec' would be NULL, and we should leave the symbol
8587 alone (it will be set to zero elsewhere in the link). */
8588 if (sec != NULL)
8589 /* Add 0x10000 if sign bit in 0:15 is set.
8590 Bits 0:15 are not used. */
8591 addend += 0x8000;
8592 break;
8593
8594 case R_PPC64_ADDR16_DS:
8595 case R_PPC64_ADDR16_LO_DS:
8596 case R_PPC64_GOT16_DS:
8597 case R_PPC64_GOT16_LO_DS:
8598 case R_PPC64_PLT16_LO_DS:
8599 case R_PPC64_SECTOFF_DS:
8600 case R_PPC64_SECTOFF_LO_DS:
8601 case R_PPC64_TOC16_DS:
8602 case R_PPC64_TOC16_LO_DS:
8603 case R_PPC64_PLTGOT16_DS:
8604 case R_PPC64_PLTGOT16_LO_DS:
8605 case R_PPC64_GOT_TPREL16_DS:
8606 case R_PPC64_GOT_TPREL16_LO_DS:
8607 case R_PPC64_GOT_DTPREL16_DS:
8608 case R_PPC64_GOT_DTPREL16_LO_DS:
8609 case R_PPC64_TPREL16_DS:
8610 case R_PPC64_TPREL16_LO_DS:
8611 case R_PPC64_DTPREL16_DS:
8612 case R_PPC64_DTPREL16_LO_DS:
8613 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
8614 mask = 3;
8615 /* If this reloc is against an lq insn, then the value must be
8616 a multiple of 16. This is somewhat of a hack, but the
8617 "correct" way to do this by defining _DQ forms of all the
8618 _DS relocs bloats all reloc switches in this file. It
8619 doesn't seem to make much sense to use any of these relocs
8620 in data, so testing the insn should be safe. */
8621 if ((insn & (0x3f << 26)) == (56u << 26))
8622 mask = 15;
8623 if (((relocation + addend) & mask) != 0)
8624 {
8625 (*_bfd_error_handler)
8626 (_("%s: error: relocation %s not a multiple of %d"),
8627 bfd_archive_filename (input_bfd),
8628 ppc64_elf_howto_table[r_type]->name,
8629 mask + 1);
8630 bfd_set_error (bfd_error_bad_value);
8631 ret = FALSE;
8632 continue;
8633 }
8634 break;
8635
8636 case R_PPC64_REL14:
8637 case R_PPC64_REL14_BRNTAKEN:
8638 case R_PPC64_REL14_BRTAKEN:
8639 max_br_offset = 1 << 15;
8640 goto branch_check;
8641
8642 case R_PPC64_REL24:
8643 max_br_offset = 1 << 25;
8644
8645 branch_check:
8646 /* If the branch is out of reach or the TOC register needs
8647 adjusting, then redirect the call to the local stub for
8648 this function. */
8649 from = (rel->r_offset
8650 + input_section->output_offset
8651 + input_section->output_section->vma);
8652 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset
8653 || (sec != NULL
8654 && sec->output_section != NULL
8655 && sec->id <= htab->top_id
8656 && (htab->stub_group[sec->id].toc_off
8657 != htab->stub_group[input_section->id].toc_off)))
8658 && (stub_entry = ppc_get_stub_entry (input_section, sec, h,
8659 rel, htab)) != NULL)
8660 {
8661 /* Munge up the value and addend so that we call the stub
8662 rather than the procedure directly. */
8663 relocation = (stub_entry->stub_offset
8664 + stub_entry->stub_sec->output_offset
8665 + stub_entry->stub_sec->output_section->vma);
8666 addend = 0;
8667 }
8668 break;
8669 }
8670
8671 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
8672 because such sections are not SEC_ALLOC and thus ld.so will
8673 not process them. */
8674 if (unresolved_reloc
8675 && !((input_section->flags & SEC_DEBUGGING) != 0
8676 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
8677 {
8678 (*_bfd_error_handler)
8679 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
8680 bfd_archive_filename (input_bfd),
8681 bfd_get_section_name (input_bfd, input_section),
8682 (long) rel->r_offset,
8683 ppc64_elf_howto_table[(int) r_type]->name,
8684 h->root.root.string);
8685 ret = FALSE;
8686 }
8687
8688 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
8689 input_bfd,
8690 input_section,
8691 contents,
8692 rel->r_offset,
8693 relocation,
8694 addend);
8695
8696 if (r != bfd_reloc_ok)
8697 {
8698 if (sym_name == NULL)
8699 sym_name = "(null)";
8700 if (r == bfd_reloc_overflow)
8701 {
8702 if (warned)
8703 continue;
8704 if (h != NULL
8705 && h->root.type == bfd_link_hash_undefweak
8706 && ppc64_elf_howto_table[r_type]->pc_relative)
8707 {
8708 /* Assume this is a call protected by other code that
8709 detects the symbol is undefined. If this is the case,
8710 we can safely ignore the overflow. If not, the
8711 program is hosed anyway, and a little warning isn't
8712 going to help. */
8713
8714 continue;
8715 }
8716
8717 if (!((*info->callbacks->reloc_overflow)
8718 (info, sym_name, ppc64_elf_howto_table[r_type]->name,
8719 rel->r_addend, input_bfd, input_section, rel->r_offset)))
8720 return FALSE;
8721 }
8722 else
8723 {
8724 (*_bfd_error_handler)
8725 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
8726 bfd_archive_filename (input_bfd),
8727 bfd_get_section_name (input_bfd, input_section),
8728 (long) rel->r_offset,
8729 ppc64_elf_howto_table[r_type]->name,
8730 sym_name,
8731 (int) r);
8732 ret = FALSE;
8733 }
8734 }
8735 }
8736
8737 return ret;
8738 }
8739
8740 /* Adjust the value of any local symbols in opd sections. */
8741
8742 static bfd_boolean
8743 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
8744 const char *name ATTRIBUTE_UNUSED,
8745 Elf_Internal_Sym *elfsym,
8746 asection *input_sec,
8747 struct elf_link_hash_entry *h)
8748 {
8749 long *adjust;
8750 bfd_vma value;
8751
8752 if (h != NULL
8753 || input_sec == NULL
8754 || ppc64_elf_section_data (input_sec) == NULL
8755 || (adjust = ppc64_elf_section_data (input_sec)->opd.adjust) == NULL)
8756 return TRUE;
8757
8758 value = elfsym->st_value - input_sec->output_offset;
8759 if (!info->relocatable)
8760 value -= input_sec->output_section->vma;
8761
8762 elfsym->st_value += adjust[value / 24];
8763 return TRUE;
8764 }
8765
8766 /* Finish up dynamic symbol handling. We set the contents of various
8767 dynamic sections here. */
8768
8769 static bfd_boolean
8770 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
8771 struct bfd_link_info *info,
8772 struct elf_link_hash_entry *h,
8773 Elf_Internal_Sym *sym)
8774 {
8775 struct ppc_link_hash_table *htab;
8776 bfd *dynobj;
8777
8778 htab = ppc_hash_table (info);
8779 dynobj = htab->elf.dynobj;
8780
8781 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
8782 {
8783 struct plt_entry *ent;
8784 Elf_Internal_Rela rela;
8785 bfd_byte *loc;
8786
8787 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8788 if (ent->plt.offset != (bfd_vma) -1)
8789 {
8790 /* This symbol has an entry in the procedure linkage
8791 table. Set it up. */
8792
8793 if (htab->plt == NULL
8794 || htab->relplt == NULL
8795 || htab->glink == NULL)
8796 abort ();
8797
8798 /* Create a JMP_SLOT reloc to inform the dynamic linker to
8799 fill in the PLT entry. */
8800 rela.r_offset = (htab->plt->output_section->vma
8801 + htab->plt->output_offset
8802 + ent->plt.offset);
8803 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
8804 rela.r_addend = ent->addend;
8805
8806 loc = htab->relplt->contents;
8807 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
8808 * sizeof (Elf64_External_Rela));
8809 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8810 }
8811 }
8812
8813 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
8814 {
8815 Elf_Internal_Rela rela;
8816 bfd_byte *loc;
8817
8818 /* This symbol needs a copy reloc. Set it up. */
8819
8820 if (h->dynindx == -1
8821 || (h->root.type != bfd_link_hash_defined
8822 && h->root.type != bfd_link_hash_defweak)
8823 || htab->relbss == NULL)
8824 abort ();
8825
8826 rela.r_offset = (h->root.u.def.value
8827 + h->root.u.def.section->output_section->vma
8828 + h->root.u.def.section->output_offset);
8829 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
8830 rela.r_addend = 0;
8831 loc = htab->relbss->contents;
8832 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
8833 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
8834 }
8835
8836 /* Mark some specially defined symbols as absolute. */
8837 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
8838 sym->st_shndx = SHN_ABS;
8839
8840 return TRUE;
8841 }
8842
8843 /* Used to decide how to sort relocs in an optimal manner for the
8844 dynamic linker, before writing them out. */
8845
8846 static enum elf_reloc_type_class
8847 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8848 {
8849 enum elf_ppc64_reloc_type r_type;
8850
8851 r_type = ELF64_R_TYPE (rela->r_info);
8852 switch (r_type)
8853 {
8854 case R_PPC64_RELATIVE:
8855 return reloc_class_relative;
8856 case R_PPC64_JMP_SLOT:
8857 return reloc_class_plt;
8858 case R_PPC64_COPY:
8859 return reloc_class_copy;
8860 default:
8861 return reloc_class_normal;
8862 }
8863 }
8864
8865 /* Finish up the dynamic sections. */
8866
8867 static bfd_boolean
8868 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
8869 struct bfd_link_info *info)
8870 {
8871 struct ppc_link_hash_table *htab;
8872 bfd *dynobj;
8873 asection *sdyn;
8874
8875 htab = ppc_hash_table (info);
8876 dynobj = htab->elf.dynobj;
8877 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8878
8879 if (htab->elf.dynamic_sections_created)
8880 {
8881 Elf64_External_Dyn *dyncon, *dynconend;
8882
8883 if (sdyn == NULL || htab->got == NULL)
8884 abort ();
8885
8886 dyncon = (Elf64_External_Dyn *) sdyn->contents;
8887 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
8888 for (; dyncon < dynconend; dyncon++)
8889 {
8890 Elf_Internal_Dyn dyn;
8891 asection *s;
8892
8893 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
8894
8895 switch (dyn.d_tag)
8896 {
8897 default:
8898 continue;
8899
8900 case DT_PPC64_GLINK:
8901 s = htab->glink;
8902 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8903 /* We stupidly defined DT_PPC64_GLINK to be the start
8904 of glink rather than the first entry point, which is
8905 what ld.so needs, and now have a bigger stub to
8906 support automatic multiple TOCs. */
8907 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
8908 break;
8909
8910 case DT_PPC64_OPD:
8911 s = bfd_get_section_by_name (output_bfd, ".opd");
8912 if (s == NULL)
8913 continue;
8914 dyn.d_un.d_ptr = s->vma;
8915 break;
8916
8917 case DT_PPC64_OPDSZ:
8918 s = bfd_get_section_by_name (output_bfd, ".opd");
8919 if (s == NULL)
8920 continue;
8921 dyn.d_un.d_val = s->_raw_size;
8922 break;
8923
8924 case DT_PLTGOT:
8925 s = htab->plt;
8926 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8927 break;
8928
8929 case DT_JMPREL:
8930 s = htab->relplt;
8931 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8932 break;
8933
8934 case DT_PLTRELSZ:
8935 dyn.d_un.d_val = htab->relplt->_raw_size;
8936 break;
8937
8938 case DT_RELASZ:
8939 /* Don't count procedure linkage table relocs in the
8940 overall reloc count. */
8941 s = htab->relplt;
8942 if (s == NULL)
8943 continue;
8944 dyn.d_un.d_val -= s->_raw_size;
8945 break;
8946
8947 case DT_RELA:
8948 /* We may not be using the standard ELF linker script.
8949 If .rela.plt is the first .rela section, we adjust
8950 DT_RELA to not include it. */
8951 s = htab->relplt;
8952 if (s == NULL)
8953 continue;
8954 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
8955 continue;
8956 dyn.d_un.d_ptr += s->_raw_size;
8957 break;
8958 }
8959
8960 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
8961 }
8962 }
8963
8964 if (htab->got != NULL && htab->got->_raw_size != 0)
8965 {
8966 /* Fill in the first entry in the global offset table.
8967 We use it to hold the link-time TOCbase. */
8968 bfd_put_64 (output_bfd,
8969 elf_gp (output_bfd) + TOC_BASE_OFF,
8970 htab->got->contents);
8971
8972 /* Set .got entry size. */
8973 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
8974 }
8975
8976 if (htab->plt != NULL && htab->plt->_raw_size != 0)
8977 {
8978 /* Set .plt entry size. */
8979 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
8980 = PLT_ENTRY_SIZE;
8981 }
8982
8983 /* We need to handle writing out multiple GOT sections ourselves,
8984 since we didn't add them to DYNOBJ. */
8985 while ((dynobj = dynobj->link_next) != NULL)
8986 {
8987 asection *s;
8988 s = ppc64_elf_tdata (dynobj)->got;
8989 if (s != NULL
8990 && s->_raw_size != 0
8991 && s->output_section != bfd_abs_section_ptr
8992 && !bfd_set_section_contents (output_bfd, s->output_section,
8993 s->contents, s->output_offset,
8994 s->_raw_size))
8995 return FALSE;
8996 s = ppc64_elf_tdata (dynobj)->relgot;
8997 if (s != NULL
8998 && s->_raw_size != 0
8999 && s->output_section != bfd_abs_section_ptr
9000 && !bfd_set_section_contents (output_bfd, s->output_section,
9001 s->contents, s->output_offset,
9002 s->_raw_size))
9003 return FALSE;
9004 }
9005
9006 return TRUE;
9007 }
9008
9009 #include "elf64-target.h"
GDB Binutils - Deliverables
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