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