projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
include/
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra <amodra@bigpond.net.au>
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_check_directives
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115
116 /* The name of the dynamic interpreter. This is put in the .interp
117 section. */
118 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
119
120 /* The size in bytes of an entry in the procedure linkage table. */
121 #define PLT_ENTRY_SIZE 24
122
123 /* The initial size of the plt reserved for the dynamic linker. */
124 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
125
126 /* TOC base pointers offset from start of TOC. */
127 #define TOC_BASE_OFF 0x8000
128
129 /* Offset of tp and dtp pointers from start of TLS block. */
130 #define TP_OFFSET 0x7000
131 #define DTP_OFFSET 0x8000
132
133 /* .plt call stub instructions. The normal stub is like this, but
134 sometimes the .plt entry crosses a 64k boundary and we need to
135 insert an addi to adjust r12. */
136 #define PLT_CALL_STUB_SIZE (7*4)
137 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
138 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
139 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
140 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
141 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
142 /* ld %r11,xxx+16@l(%r12) */
143 #define BCTR 0x4e800420 /* bctr */
144
145
146 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
147 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
148 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
149 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
150
151 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
152 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
153
154 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
155
156 /* glink call stub instructions. We enter with the index in R0. */
157 #define GLINK_CALL_STUB_SIZE (16*4)
158 /* 0: */
159 /* .quad plt0-1f */
160 /* __glink: */
161 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
162 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
163 /* 1: */
164 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
165 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
166 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
167 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
168 /* ld %11,0(%12) */
169 /* ld %2,8(%12) */
170 /* mtctr %11 */
171 /* ld %11,16(%12) */
172 /* bctr */
173
174 /* Pad with this. */
175 #define NOP 0x60000000
176
177 /* Some other nops. */
178 #define CROR_151515 0x4def7b82
179 #define CROR_313131 0x4ffffb82
180
181 /* .glink entries for the first 32k functions are two instructions. */
182 #define LI_R0_0 0x38000000 /* li %r0,0 */
183 #define B_DOT 0x48000000 /* b . */
184
185 /* After that, we need two instructions to load the index, followed by
186 a branch. */
187 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
188 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
189
190 /* Instructions used by the save and restore reg functions. */
191 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
192 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
193 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
194 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
195 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
196 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
197 #define LI_R12_0 0x39800000 /* li %r12,0 */
198 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
199 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
200 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
201 #define BLR 0x4e800020 /* blr */
202
203 /* Since .opd is an array of descriptors and each entry will end up
204 with identical R_PPC64_RELATIVE relocs, there is really no need to
205 propagate .opd relocs; The dynamic linker should be taught to
206 relocate .opd without reloc entries. */
207 #ifndef NO_OPD_RELOCS
208 #define NO_OPD_RELOCS 0
209 #endif
210 \f
211 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
212
213 /* Relocation HOWTO's. */
214 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
215
216 static reloc_howto_type ppc64_elf_howto_raw[] = {
217 /* This reloc does nothing. */
218 HOWTO (R_PPC64_NONE, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 32, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_dont, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC64_NONE", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 32 bit relocation. */
233 HOWTO (R_PPC64_ADDR32, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC64_ADDR32", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* An absolute 26 bit branch; the lower two bits must be zero.
248 FIXME: we don't check that, we just clear them. */
249 HOWTO (R_PPC64_ADDR24, /* type */
250 0, /* rightshift */
251 2, /* size (0 = byte, 1 = short, 2 = long) */
252 26, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_bitfield, /* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC64_ADDR24", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0x03fffffc, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* A standard 16 bit relocation. */
264 HOWTO (R_PPC64_ADDR16, /* type */
265 0, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_bitfield, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC64_ADDR16", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* A 16 bit relocation without overflow. */
279 HOWTO (R_PPC64_ADDR16_LO, /* type */
280 0, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont,/* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC64_ADDR16_LO", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* Bits 16-31 of an address. */
294 HOWTO (R_PPC64_ADDR16_HI, /* type */
295 16, /* rightshift */
296 1, /* size (0 = byte, 1 = short, 2 = long) */
297 16, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_dont, /* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_PPC64_ADDR16_HI", /* name */
303 FALSE, /* partial_inplace */
304 0, /* src_mask */
305 0xffff, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
309 bits, treated as a signed number, is negative. */
310 HOWTO (R_PPC64_ADDR16_HA, /* type */
311 16, /* rightshift */
312 1, /* size (0 = byte, 1 = short, 2 = long) */
313 16, /* bitsize */
314 FALSE, /* pc_relative */
315 0, /* bitpos */
316 complain_overflow_dont, /* complain_on_overflow */
317 ppc64_elf_ha_reloc, /* special_function */
318 "R_PPC64_ADDR16_HA", /* name */
319 FALSE, /* partial_inplace */
320 0, /* src_mask */
321 0xffff, /* dst_mask */
322 FALSE), /* pcrel_offset */
323
324 /* An absolute 16 bit branch; the lower two bits must be zero.
325 FIXME: we don't check that, we just clear them. */
326 HOWTO (R_PPC64_ADDR14, /* type */
327 0, /* rightshift */
328 2, /* size (0 = byte, 1 = short, 2 = long) */
329 16, /* bitsize */
330 FALSE, /* pc_relative */
331 0, /* bitpos */
332 complain_overflow_bitfield, /* complain_on_overflow */
333 ppc64_elf_branch_reloc, /* special_function */
334 "R_PPC64_ADDR14", /* name */
335 FALSE, /* partial_inplace */
336 0, /* src_mask */
337 0x0000fffc, /* dst_mask */
338 FALSE), /* pcrel_offset */
339
340 /* An absolute 16 bit branch, for which bit 10 should be set to
341 indicate that the branch is expected to be taken. The lower two
342 bits must be zero. */
343 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 FALSE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_bitfield, /* complain_on_overflow */
350 ppc64_elf_brtaken_reloc, /* special_function */
351 "R_PPC64_ADDR14_BRTAKEN",/* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0x0000fffc, /* dst_mask */
355 FALSE), /* pcrel_offset */
356
357 /* An absolute 16 bit branch, for which bit 10 should be set to
358 indicate that the branch is not expected to be taken. The lower
359 two bits must be zero. */
360 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 FALSE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_bitfield, /* complain_on_overflow */
367 ppc64_elf_brtaken_reloc, /* special_function */
368 "R_PPC64_ADDR14_BRNTAKEN",/* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x0000fffc, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* A relative 26 bit branch; the lower two bits must be zero. */
375 HOWTO (R_PPC64_REL24, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 26, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_signed, /* complain_on_overflow */
382 ppc64_elf_branch_reloc, /* special_function */
383 "R_PPC64_REL24", /* name */
384 FALSE, /* partial_inplace */
385 0, /* src_mask */
386 0x03fffffc, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 /* A relative 16 bit branch; the lower two bits must be zero. */
390 HOWTO (R_PPC64_REL14, /* type */
391 0, /* rightshift */
392 2, /* size (0 = byte, 1 = short, 2 = long) */
393 16, /* bitsize */
394 TRUE, /* pc_relative */
395 0, /* bitpos */
396 complain_overflow_signed, /* complain_on_overflow */
397 ppc64_elf_branch_reloc, /* special_function */
398 "R_PPC64_REL14", /* name */
399 FALSE, /* partial_inplace */
400 0, /* src_mask */
401 0x0000fffc, /* dst_mask */
402 TRUE), /* pcrel_offset */
403
404 /* A relative 16 bit branch. Bit 10 should be set to indicate that
405 the branch is expected to be taken. The lower two bits must be
406 zero. */
407 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
408 0, /* rightshift */
409 2, /* size (0 = byte, 1 = short, 2 = long) */
410 16, /* bitsize */
411 TRUE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_signed, /* complain_on_overflow */
414 ppc64_elf_brtaken_reloc, /* special_function */
415 "R_PPC64_REL14_BRTAKEN", /* name */
416 FALSE, /* partial_inplace */
417 0, /* src_mask */
418 0x0000fffc, /* dst_mask */
419 TRUE), /* pcrel_offset */
420
421 /* A relative 16 bit branch. Bit 10 should be set to indicate that
422 the branch is not expected to be taken. The lower two bits must
423 be zero. */
424 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
425 0, /* rightshift */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
427 16, /* bitsize */
428 TRUE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_signed, /* complain_on_overflow */
431 ppc64_elf_brtaken_reloc, /* special_function */
432 "R_PPC64_REL14_BRNTAKEN",/* name */
433 FALSE, /* partial_inplace */
434 0, /* src_mask */
435 0x0000fffc, /* dst_mask */
436 TRUE), /* pcrel_offset */
437
438 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
439 symbol. */
440 HOWTO (R_PPC64_GOT16, /* type */
441 0, /* rightshift */
442 1, /* size (0 = byte, 1 = short, 2 = long) */
443 16, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_signed, /* complain_on_overflow */
447 ppc64_elf_unhandled_reloc, /* special_function */
448 "R_PPC64_GOT16", /* name */
449 FALSE, /* partial_inplace */
450 0, /* src_mask */
451 0xffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
455 the symbol. */
456 HOWTO (R_PPC64_GOT16_LO, /* type */
457 0, /* rightshift */
458 1, /* size (0 = byte, 1 = short, 2 = long) */
459 16, /* bitsize */
460 FALSE, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_dont, /* complain_on_overflow */
463 ppc64_elf_unhandled_reloc, /* special_function */
464 "R_PPC64_GOT16_LO", /* name */
465 FALSE, /* partial_inplace */
466 0, /* src_mask */
467 0xffff, /* dst_mask */
468 FALSE), /* pcrel_offset */
469
470 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
471 the symbol. */
472 HOWTO (R_PPC64_GOT16_HI, /* type */
473 16, /* rightshift */
474 1, /* size (0 = byte, 1 = short, 2 = long) */
475 16, /* bitsize */
476 FALSE, /* pc_relative */
477 0, /* bitpos */
478 complain_overflow_dont,/* complain_on_overflow */
479 ppc64_elf_unhandled_reloc, /* special_function */
480 "R_PPC64_GOT16_HI", /* name */
481 FALSE, /* partial_inplace */
482 0, /* src_mask */
483 0xffff, /* dst_mask */
484 FALSE), /* pcrel_offset */
485
486 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
487 the symbol. */
488 HOWTO (R_PPC64_GOT16_HA, /* type */
489 16, /* rightshift */
490 1, /* size (0 = byte, 1 = short, 2 = long) */
491 16, /* bitsize */
492 FALSE, /* pc_relative */
493 0, /* bitpos */
494 complain_overflow_dont,/* complain_on_overflow */
495 ppc64_elf_unhandled_reloc, /* special_function */
496 "R_PPC64_GOT16_HA", /* name */
497 FALSE, /* partial_inplace */
498 0, /* src_mask */
499 0xffff, /* dst_mask */
500 FALSE), /* pcrel_offset */
501
502 /* This is used only by the dynamic linker. The symbol should exist
503 both in the object being run and in some shared library. The
504 dynamic linker copies the data addressed by the symbol from the
505 shared library into the object, because the object being
506 run has to have the data at some particular address. */
507 HOWTO (R_PPC64_COPY, /* type */
508 0, /* rightshift */
509 0, /* this one is variable size */
510 0, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_COPY", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR64, but used when setting global offset table
522 entries. */
523 HOWTO (R_PPC64_GLOB_DAT, /* type */
524 0, /* rightshift */
525 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
526 64, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GLOB_DAT", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 ONES (64), /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Created by the link editor. Marks a procedure linkage table
538 entry for a symbol. */
539 HOWTO (R_PPC64_JMP_SLOT, /* type */
540 0, /* rightshift */
541 0, /* size (0 = byte, 1 = short, 2 = long) */
542 0, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_JMP_SLOT", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Used only by the dynamic linker. When the object is run, this
554 doubleword64 is set to the load address of the object, plus the
555 addend. */
556 HOWTO (R_PPC64_RELATIVE, /* type */
557 0, /* rightshift */
558 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
559 64, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_dont, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC64_RELATIVE", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 ONES (64), /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC64_ADDR32, but may be unaligned. */
571 HOWTO (R_PPC64_UADDR32, /* type */
572 0, /* rightshift */
573 2, /* size (0 = byte, 1 = short, 2 = long) */
574 32, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC64_UADDR32", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffffffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* Like R_PPC64_ADDR16, but may be unaligned. */
586 HOWTO (R_PPC64_UADDR16, /* type */
587 0, /* rightshift */
588 1, /* size (0 = byte, 1 = short, 2 = long) */
589 16, /* bitsize */
590 FALSE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC64_UADDR16", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffff, /* dst_mask */
598 FALSE), /* pcrel_offset */
599
600 /* 32-bit PC relative. */
601 HOWTO (R_PPC64_REL32, /* type */
602 0, /* rightshift */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
604 32, /* bitsize */
605 TRUE, /* pc_relative */
606 0, /* bitpos */
607 /* FIXME: Verify. Was complain_overflow_bitfield. */
608 complain_overflow_signed, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC64_REL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* 32-bit relocation to the symbol's procedure linkage table. */
617 HOWTO (R_PPC64_PLT32, /* type */
618 0, /* rightshift */
619 2, /* size (0 = byte, 1 = short, 2 = long) */
620 32, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_bitfield, /* complain_on_overflow */
624 ppc64_elf_unhandled_reloc, /* special_function */
625 "R_PPC64_PLT32", /* name */
626 FALSE, /* partial_inplace */
627 0, /* src_mask */
628 0xffffffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
632 FIXME: R_PPC64_PLTREL32 not supported. */
633 HOWTO (R_PPC64_PLTREL32, /* type */
634 0, /* rightshift */
635 2, /* size (0 = byte, 1 = short, 2 = long) */
636 32, /* bitsize */
637 TRUE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_signed, /* complain_on_overflow */
640 bfd_elf_generic_reloc, /* special_function */
641 "R_PPC64_PLTREL32", /* name */
642 FALSE, /* partial_inplace */
643 0, /* src_mask */
644 0xffffffff, /* dst_mask */
645 TRUE), /* pcrel_offset */
646
647 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
648 the symbol. */
649 HOWTO (R_PPC64_PLT16_LO, /* type */
650 0, /* rightshift */
651 1, /* size (0 = byte, 1 = short, 2 = long) */
652 16, /* bitsize */
653 FALSE, /* pc_relative */
654 0, /* bitpos */
655 complain_overflow_dont, /* complain_on_overflow */
656 ppc64_elf_unhandled_reloc, /* special_function */
657 "R_PPC64_PLT16_LO", /* name */
658 FALSE, /* partial_inplace */
659 0, /* src_mask */
660 0xffff, /* dst_mask */
661 FALSE), /* pcrel_offset */
662
663 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
664 the symbol. */
665 HOWTO (R_PPC64_PLT16_HI, /* type */
666 16, /* rightshift */
667 1, /* size (0 = byte, 1 = short, 2 = long) */
668 16, /* bitsize */
669 FALSE, /* pc_relative */
670 0, /* bitpos */
671 complain_overflow_dont, /* complain_on_overflow */
672 ppc64_elf_unhandled_reloc, /* special_function */
673 "R_PPC64_PLT16_HI", /* name */
674 FALSE, /* partial_inplace */
675 0, /* src_mask */
676 0xffff, /* dst_mask */
677 FALSE), /* pcrel_offset */
678
679 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
680 the symbol. */
681 HOWTO (R_PPC64_PLT16_HA, /* type */
682 16, /* 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_unhandled_reloc, /* special_function */
689 "R_PPC64_PLT16_HA", /* name */
690 FALSE, /* partial_inplace */
691 0, /* src_mask */
692 0xffff, /* dst_mask */
693 FALSE), /* pcrel_offset */
694
695 /* 16-bit section relative relocation. */
696 HOWTO (R_PPC64_SECTOFF, /* type */
697 0, /* rightshift */
698 1, /* size (0 = byte, 1 = short, 2 = long) */
699 16, /* bitsize */
700 FALSE, /* pc_relative */
701 0, /* bitpos */
702 complain_overflow_bitfield, /* complain_on_overflow */
703 ppc64_elf_sectoff_reloc, /* special_function */
704 "R_PPC64_SECTOFF", /* name */
705 FALSE, /* partial_inplace */
706 0, /* src_mask */
707 0xffff, /* dst_mask */
708 FALSE), /* pcrel_offset */
709
710 /* Like R_PPC64_SECTOFF, but no overflow warning. */
711 HOWTO (R_PPC64_SECTOFF_LO, /* type */
712 0, /* 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_reloc, /* special_function */
719 "R_PPC64_SECTOFF_LO", /* name */
720 FALSE, /* partial_inplace */
721 0, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
724
725 /* 16-bit upper half section relative relocation. */
726 HOWTO (R_PPC64_SECTOFF_HI, /* type */
727 16, /* rightshift */
728 1, /* size (0 = byte, 1 = short, 2 = long) */
729 16, /* bitsize */
730 FALSE, /* pc_relative */
731 0, /* bitpos */
732 complain_overflow_dont, /* complain_on_overflow */
733 ppc64_elf_sectoff_reloc, /* special_function */
734 "R_PPC64_SECTOFF_HI", /* name */
735 FALSE, /* partial_inplace */
736 0, /* src_mask */
737 0xffff, /* dst_mask */
738 FALSE), /* pcrel_offset */
739
740 /* 16-bit upper half adjusted section relative relocation. */
741 HOWTO (R_PPC64_SECTOFF_HA, /* type */
742 16, /* rightshift */
743 1, /* size (0 = byte, 1 = short, 2 = long) */
744 16, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont, /* complain_on_overflow */
748 ppc64_elf_sectoff_ha_reloc, /* special_function */
749 "R_PPC64_SECTOFF_HA", /* name */
750 FALSE, /* partial_inplace */
751 0, /* src_mask */
752 0xffff, /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 /* Like R_PPC64_REL24 without touching the two least significant bits. */
756 HOWTO (R_PPC64_REL30, /* type */
757 2, /* rightshift */
758 2, /* size (0 = byte, 1 = short, 2 = long) */
759 30, /* bitsize */
760 TRUE, /* pc_relative */
761 0, /* bitpos */
762 complain_overflow_dont, /* complain_on_overflow */
763 bfd_elf_generic_reloc, /* special_function */
764 "R_PPC64_REL30", /* name */
765 FALSE, /* partial_inplace */
766 0, /* src_mask */
767 0xfffffffc, /* dst_mask */
768 TRUE), /* pcrel_offset */
769
770 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
771
772 /* A standard 64-bit relocation. */
773 HOWTO (R_PPC64_ADDR64, /* type */
774 0, /* rightshift */
775 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
776 64, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_PPC64_ADDR64", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 ONES (64), /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 /* The bits 32-47 of an address. */
788 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
789 32, /* rightshift */
790 1, /* size (0 = byte, 1 = short, 2 = long) */
791 16, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC64_ADDR16_HIGHER", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0xffff, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 /* The bits 32-47 of an address, plus 1 if the contents of the low
803 16 bits, treated as a signed number, is negative. */
804 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
805 32, /* rightshift */
806 1, /* size (0 = byte, 1 = short, 2 = long) */
807 16, /* bitsize */
808 FALSE, /* pc_relative */
809 0, /* bitpos */
810 complain_overflow_dont, /* complain_on_overflow */
811 ppc64_elf_ha_reloc, /* special_function */
812 "R_PPC64_ADDR16_HIGHERA", /* name */
813 FALSE, /* partial_inplace */
814 0, /* src_mask */
815 0xffff, /* dst_mask */
816 FALSE), /* pcrel_offset */
817
818 /* The bits 48-63 of an address. */
819 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
820 48, /* rightshift */
821 1, /* size (0 = byte, 1 = short, 2 = long) */
822 16, /* bitsize */
823 FALSE, /* pc_relative */
824 0, /* bitpos */
825 complain_overflow_dont, /* complain_on_overflow */
826 bfd_elf_generic_reloc, /* special_function */
827 "R_PPC64_ADDR16_HIGHEST", /* name */
828 FALSE, /* partial_inplace */
829 0, /* src_mask */
830 0xffff, /* dst_mask */
831 FALSE), /* pcrel_offset */
832
833 /* The bits 48-63 of an address, plus 1 if the contents of the low
834 16 bits, treated as a signed number, is negative. */
835 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
836 48, /* rightshift */
837 1, /* size (0 = byte, 1 = short, 2 = long) */
838 16, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc64_elf_ha_reloc, /* special_function */
843 "R_PPC64_ADDR16_HIGHESTA", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* Like ADDR64, but may be unaligned. */
850 HOWTO (R_PPC64_UADDR64, /* 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 bfd_elf_generic_reloc, /* special_function */
858 "R_PPC64_UADDR64", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 ONES (64), /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* 64-bit relative relocation. */
865 HOWTO (R_PPC64_REL64, /* type */
866 0, /* rightshift */
867 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
868 64, /* bitsize */
869 TRUE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 bfd_elf_generic_reloc, /* special_function */
873 "R_PPC64_REL64", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 ONES (64), /* dst_mask */
877 TRUE), /* pcrel_offset */
878
879 /* 64-bit relocation to the symbol's procedure linkage table. */
880 HOWTO (R_PPC64_PLT64, /* type */
881 0, /* rightshift */
882 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
883 64, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc64_elf_unhandled_reloc, /* special_function */
888 "R_PPC64_PLT64", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 ONES (64), /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* 64-bit PC relative relocation to the symbol's procedure linkage
895 table. */
896 /* FIXME: R_PPC64_PLTREL64 not supported. */
897 HOWTO (R_PPC64_PLTREL64, /* type */
898 0, /* rightshift */
899 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
900 64, /* bitsize */
901 TRUE, /* pc_relative */
902 0, /* bitpos */
903 complain_overflow_dont, /* complain_on_overflow */
904 ppc64_elf_unhandled_reloc, /* special_function */
905 "R_PPC64_PLTREL64", /* name */
906 FALSE, /* partial_inplace */
907 0, /* src_mask */
908 ONES (64), /* dst_mask */
909 TRUE), /* pcrel_offset */
910
911 /* 16 bit TOC-relative relocation. */
912
913 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
914 HOWTO (R_PPC64_TOC16, /* type */
915 0, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_signed, /* complain_on_overflow */
921 ppc64_elf_toc_reloc, /* special_function */
922 "R_PPC64_TOC16", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* 16 bit TOC-relative relocation without overflow. */
929
930 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
931 HOWTO (R_PPC64_TOC16_LO, /* type */
932 0, /* rightshift */
933 1, /* size (0 = byte, 1 = short, 2 = long) */
934 16, /* bitsize */
935 FALSE, /* pc_relative */
936 0, /* bitpos */
937 complain_overflow_dont, /* complain_on_overflow */
938 ppc64_elf_toc_reloc, /* special_function */
939 "R_PPC64_TOC16_LO", /* name */
940 FALSE, /* partial_inplace */
941 0, /* src_mask */
942 0xffff, /* dst_mask */
943 FALSE), /* pcrel_offset */
944
945 /* 16 bit TOC-relative relocation, high 16 bits. */
946
947 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
948 HOWTO (R_PPC64_TOC16_HI, /* type */
949 16, /* rightshift */
950 1, /* size (0 = byte, 1 = short, 2 = long) */
951 16, /* bitsize */
952 FALSE, /* pc_relative */
953 0, /* bitpos */
954 complain_overflow_dont, /* complain_on_overflow */
955 ppc64_elf_toc_reloc, /* special_function */
956 "R_PPC64_TOC16_HI", /* name */
957 FALSE, /* partial_inplace */
958 0, /* src_mask */
959 0xffff, /* dst_mask */
960 FALSE), /* pcrel_offset */
961
962 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
963 contents of the low 16 bits, treated as a signed number, is
964 negative. */
965
966 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
967 HOWTO (R_PPC64_TOC16_HA, /* type */
968 16, /* rightshift */
969 1, /* size (0 = byte, 1 = short, 2 = long) */
970 16, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc64_elf_toc_ha_reloc, /* special_function */
975 "R_PPC64_TOC16_HA", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* 64-bit relocation; insert value of TOC base (.TOC.). */
982
983 /* R_PPC64_TOC 51 doubleword64 .TOC. */
984 HOWTO (R_PPC64_TOC, /* type */
985 0, /* rightshift */
986 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
987 64, /* bitsize */
988 FALSE, /* pc_relative */
989 0, /* bitpos */
990 complain_overflow_bitfield, /* complain_on_overflow */
991 ppc64_elf_toc64_reloc, /* special_function */
992 "R_PPC64_TOC", /* name */
993 FALSE, /* partial_inplace */
994 0, /* src_mask */
995 ONES (64), /* dst_mask */
996 FALSE), /* pcrel_offset */
997
998 /* Like R_PPC64_GOT16, but also informs the link editor that the
999 value to relocate may (!) refer to a PLT entry which the link
1000 editor (a) may replace with the symbol value. If the link editor
1001 is unable to fully resolve the symbol, it may (b) create a PLT
1002 entry and store the address to the new PLT entry in the GOT.
1003 This permits lazy resolution of function symbols at run time.
1004 The link editor may also skip all of this and just (c) emit a
1005 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1006 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1007 HOWTO (R_PPC64_PLTGOT16, /* type */
1008 0, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_unhandled_reloc, /* special_function */
1015 "R_PPC64_PLTGOT16", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* Like R_PPC64_PLTGOT16, but without overflow. */
1022 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1023 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1024 0, /* rightshift */
1025 1, /* size (0 = byte, 1 = short, 2 = long) */
1026 16, /* bitsize */
1027 FALSE, /* pc_relative */
1028 0, /* bitpos */
1029 complain_overflow_dont, /* complain_on_overflow */
1030 ppc64_elf_unhandled_reloc, /* special_function */
1031 "R_PPC64_PLTGOT16_LO", /* name */
1032 FALSE, /* partial_inplace */
1033 0, /* src_mask */
1034 0xffff, /* dst_mask */
1035 FALSE), /* pcrel_offset */
1036
1037 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1038 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1039 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1040 16, /* rightshift */
1041 1, /* size (0 = byte, 1 = short, 2 = long) */
1042 16, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_unhandled_reloc, /* special_function */
1047 "R_PPC64_PLTGOT16_HI", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 0xffff, /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1054 1 if the contents of the low 16 bits, treated as a signed number,
1055 is negative. */
1056 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1058 16, /* 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 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16_HA", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1072 HOWTO (R_PPC64_ADDR16_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_bitfield, /* complain_on_overflow */
1079 bfd_elf_generic_reloc, /* special_function */
1080 "R_PPC64_ADDR16_DS", /* name */
1081 FALSE, /* partial_inplace */
1082 0, /* src_mask */
1083 0xfffc, /* dst_mask */
1084 FALSE), /* pcrel_offset */
1085
1086 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1087 HOWTO (R_PPC64_ADDR16_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 bfd_elf_generic_reloc, /* special_function */
1095 "R_PPC64_ADDR16_LO_DS",/* name */
1096 FALSE, /* partial_inplace */
1097 0, /* src_mask */
1098 0xfffc, /* dst_mask */
1099 FALSE), /* pcrel_offset */
1100
1101 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1102 HOWTO (R_PPC64_GOT16_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_signed, /* complain_on_overflow */
1109 ppc64_elf_unhandled_reloc, /* special_function */
1110 "R_PPC64_GOT16_DS", /* name */
1111 FALSE, /* partial_inplace */
1112 0, /* src_mask */
1113 0xfffc, /* dst_mask */
1114 FALSE), /* pcrel_offset */
1115
1116 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1117 HOWTO (R_PPC64_GOT16_LO_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_dont, /* complain_on_overflow */
1124 ppc64_elf_unhandled_reloc, /* special_function */
1125 "R_PPC64_GOT16_LO_DS", /* name */
1126 FALSE, /* partial_inplace */
1127 0, /* src_mask */
1128 0xfffc, /* dst_mask */
1129 FALSE), /* pcrel_offset */
1130
1131 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1132 HOWTO (R_PPC64_PLT16_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_unhandled_reloc, /* special_function */
1140 "R_PPC64_PLT16_LO_DS", /* name */
1141 FALSE, /* partial_inplace */
1142 0, /* src_mask */
1143 0xfffc, /* dst_mask */
1144 FALSE), /* pcrel_offset */
1145
1146 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1147 HOWTO (R_PPC64_SECTOFF_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_bitfield, /* complain_on_overflow */
1154 ppc64_elf_sectoff_reloc, /* special_function */
1155 "R_PPC64_SECTOFF_DS", /* name */
1156 FALSE, /* partial_inplace */
1157 0, /* src_mask */
1158 0xfffc, /* dst_mask */
1159 FALSE), /* pcrel_offset */
1160
1161 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1162 HOWTO (R_PPC64_SECTOFF_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_sectoff_reloc, /* special_function */
1170 "R_PPC64_SECTOFF_LO_DS",/* name */
1171 FALSE, /* partial_inplace */
1172 0, /* src_mask */
1173 0xfffc, /* dst_mask */
1174 FALSE), /* pcrel_offset */
1175
1176 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1177 HOWTO (R_PPC64_TOC16_DS, /* type */
1178 0, /* rightshift */
1179 1, /* size (0 = byte, 1 = short, 2 = long) */
1180 16, /* bitsize */
1181 FALSE, /* pc_relative */
1182 0, /* bitpos */
1183 complain_overflow_signed, /* complain_on_overflow */
1184 ppc64_elf_toc_reloc, /* special_function */
1185 "R_PPC64_TOC16_DS", /* name */
1186 FALSE, /* partial_inplace */
1187 0, /* src_mask */
1188 0xfffc, /* dst_mask */
1189 FALSE), /* pcrel_offset */
1190
1191 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1192 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1193 0, /* rightshift */
1194 1, /* size (0 = byte, 1 = short, 2 = long) */
1195 16, /* bitsize */
1196 FALSE, /* pc_relative */
1197 0, /* bitpos */
1198 complain_overflow_dont, /* complain_on_overflow */
1199 ppc64_elf_toc_reloc, /* special_function */
1200 "R_PPC64_TOC16_LO_DS", /* name */
1201 FALSE, /* partial_inplace */
1202 0, /* src_mask */
1203 0xfffc, /* dst_mask */
1204 FALSE), /* pcrel_offset */
1205
1206 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1207 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1208 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1209 0, /* rightshift */
1210 1, /* size (0 = byte, 1 = short, 2 = long) */
1211 16, /* bitsize */
1212 FALSE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_signed, /* complain_on_overflow */
1215 ppc64_elf_unhandled_reloc, /* special_function */
1216 "R_PPC64_PLTGOT16_DS", /* name */
1217 FALSE, /* partial_inplace */
1218 0, /* src_mask */
1219 0xfffc, /* dst_mask */
1220 FALSE), /* pcrel_offset */
1221
1222 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1223 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1224 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1225 0, /* rightshift */
1226 1, /* size (0 = byte, 1 = short, 2 = long) */
1227 16, /* bitsize */
1228 FALSE, /* pc_relative */
1229 0, /* bitpos */
1230 complain_overflow_dont, /* complain_on_overflow */
1231 ppc64_elf_unhandled_reloc, /* special_function */
1232 "R_PPC64_PLTGOT16_LO_DS",/* name */
1233 FALSE, /* partial_inplace */
1234 0, /* src_mask */
1235 0xfffc, /* dst_mask */
1236 FALSE), /* pcrel_offset */
1237
1238 /* Marker reloc for TLS. */
1239 HOWTO (R_PPC64_TLS,
1240 0, /* rightshift */
1241 2, /* size (0 = byte, 1 = short, 2 = long) */
1242 32, /* bitsize */
1243 FALSE, /* pc_relative */
1244 0, /* bitpos */
1245 complain_overflow_dont, /* complain_on_overflow */
1246 bfd_elf_generic_reloc, /* special_function */
1247 "R_PPC64_TLS", /* name */
1248 FALSE, /* partial_inplace */
1249 0, /* src_mask */
1250 0, /* dst_mask */
1251 FALSE), /* pcrel_offset */
1252
1253 /* Computes the load module index of the load module that contains the
1254 definition of its TLS sym. */
1255 HOWTO (R_PPC64_DTPMOD64,
1256 0, /* rightshift */
1257 4, /* size (0 = byte, 1 = short, 2 = long) */
1258 64, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_dont, /* complain_on_overflow */
1262 ppc64_elf_unhandled_reloc, /* special_function */
1263 "R_PPC64_DTPMOD64", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 ONES (64), /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 /* Computes a dtv-relative displacement, the difference between the value
1270 of sym+add and the base address of the thread-local storage block that
1271 contains the definition of sym, minus 0x8000. */
1272 HOWTO (R_PPC64_DTPREL64,
1273 0, /* rightshift */
1274 4, /* size (0 = byte, 1 = short, 2 = long) */
1275 64, /* 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_DTPREL64", /* name */
1281 FALSE, /* partial_inplace */
1282 0, /* src_mask */
1283 ONES (64), /* dst_mask */
1284 FALSE), /* pcrel_offset */
1285
1286 /* A 16 bit dtprel reloc. */
1287 HOWTO (R_PPC64_DTPREL16,
1288 0, /* rightshift */
1289 1, /* size (0 = byte, 1 = short, 2 = long) */
1290 16, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
1293 complain_overflow_signed, /* complain_on_overflow */
1294 ppc64_elf_unhandled_reloc, /* special_function */
1295 "R_PPC64_DTPREL16", /* name */
1296 FALSE, /* partial_inplace */
1297 0, /* src_mask */
1298 0xffff, /* dst_mask */
1299 FALSE), /* pcrel_offset */
1300
1301 /* Like DTPREL16, but no overflow. */
1302 HOWTO (R_PPC64_DTPREL16_LO,
1303 0, /* 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_LO", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 0xffff, /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1317 HOWTO (R_PPC64_DTPREL16_HI,
1318 16, /* 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_HI", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1332 HOWTO (R_PPC64_DTPREL16_HA,
1333 16, /* 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_HA", /* name */
1341 FALSE, /* partial_inplace */
1342 0, /* src_mask */
1343 0xffff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1347 HOWTO (R_PPC64_DTPREL16_HIGHER,
1348 32, /* 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_HIGHER", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1362 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1363 32, /* 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_HIGHERA", /* name */
1371 FALSE, /* partial_inplace */
1372 0, /* src_mask */
1373 0xffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1375
1376 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1377 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1378 48, /* rightshift */
1379 1, /* size (0 = byte, 1 = short, 2 = long) */
1380 16, /* bitsize */
1381 FALSE, /* pc_relative */
1382 0, /* bitpos */
1383 complain_overflow_dont, /* complain_on_overflow */
1384 ppc64_elf_unhandled_reloc, /* special_function */
1385 "R_PPC64_DTPREL16_HIGHEST", /* name */
1386 FALSE, /* partial_inplace */
1387 0, /* src_mask */
1388 0xffff, /* dst_mask */
1389 FALSE), /* pcrel_offset */
1390
1391 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1392 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1393 48, /* 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_HIGHESTA", /* name */
1401 FALSE, /* partial_inplace */
1402 0, /* src_mask */
1403 0xffff, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1405
1406 /* Like DTPREL16, but for insns with a DS field. */
1407 HOWTO (R_PPC64_DTPREL16_DS,
1408 0, /* rightshift */
1409 1, /* size (0 = byte, 1 = short, 2 = long) */
1410 16, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_signed, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_DTPREL16_DS", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 0xfffc, /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* Like DTPREL16_DS, but no overflow. */
1422 HOWTO (R_PPC64_DTPREL16_LO_DS,
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_dont, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_DTPREL16_LO_DS", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xfffc, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Computes a tp-relative displacement, the difference between the value of
1437 sym+add and the value of the thread pointer (r13). */
1438 HOWTO (R_PPC64_TPREL64,
1439 0, /* rightshift */
1440 4, /* size (0 = byte, 1 = short, 2 = long) */
1441 64, /* 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_TPREL64", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 ONES (64), /* dst_mask */
1450 FALSE), /* pcrel_offset */
1451
1452 /* A 16 bit tprel reloc. */
1453 HOWTO (R_PPC64_TPREL16,
1454 0, /* rightshift */
1455 1, /* size (0 = byte, 1 = short, 2 = long) */
1456 16, /* bitsize */
1457 FALSE, /* pc_relative */
1458 0, /* bitpos */
1459 complain_overflow_signed, /* complain_on_overflow */
1460 ppc64_elf_unhandled_reloc, /* special_function */
1461 "R_PPC64_TPREL16", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0xffff, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* Like TPREL16, but no overflow. */
1468 HOWTO (R_PPC64_TPREL16_LO,
1469 0, /* 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_LO", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 0xffff, /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* Like TPREL16_LO, but next higher group of 16 bits. */
1483 HOWTO (R_PPC64_TPREL16_HI,
1484 16, /* 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_HI", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0xffff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Like TPREL16_HI, but adjust for low 16 bits. */
1498 HOWTO (R_PPC64_TPREL16_HA,
1499 16, /* 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_HA", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Like TPREL16_HI, but next higher group of 16 bits. */
1513 HOWTO (R_PPC64_TPREL16_HIGHER,
1514 32, /* 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_HIGHER", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0xffff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1528 HOWTO (R_PPC64_TPREL16_HIGHERA,
1529 32, /* 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_HIGHERA", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1543 HOWTO (R_PPC64_TPREL16_HIGHEST,
1544 48, /* rightshift */
1545 1, /* size (0 = byte, 1 = short, 2 = long) */
1546 16, /* bitsize */
1547 FALSE, /* pc_relative */
1548 0, /* bitpos */
1549 complain_overflow_dont, /* complain_on_overflow */
1550 ppc64_elf_unhandled_reloc, /* special_function */
1551 "R_PPC64_TPREL16_HIGHEST", /* name */
1552 FALSE, /* partial_inplace */
1553 0, /* src_mask */
1554 0xffff, /* dst_mask */
1555 FALSE), /* pcrel_offset */
1556
1557 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1558 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1559 48, /* 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_HIGHESTA", /* name */
1567 FALSE, /* partial_inplace */
1568 0, /* src_mask */
1569 0xffff, /* dst_mask */
1570 FALSE), /* pcrel_offset */
1571
1572 /* Like TPREL16, but for insns with a DS field. */
1573 HOWTO (R_PPC64_TPREL16_DS,
1574 0, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_signed, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_TPREL16_DS", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xfffc, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like TPREL16_DS, but no overflow. */
1588 HOWTO (R_PPC64_TPREL16_LO_DS,
1589 0, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_TPREL16_LO_DS", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xfffc, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1603 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1604 to the first entry relative to the TOC base (r2). */
1605 HOWTO (R_PPC64_GOT_TLSGD16,
1606 0, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_signed, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_GOT_TLSGD16", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like GOT_TLSGD16, but no overflow. */
1620 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1621 0, /* 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_LO", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1636 16, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSGD16_HI", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1651 16, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSGD16_HA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1665 with values (sym+add)@dtpmod and zero, and computes the offset to the
1666 first entry relative to the TOC base (r2). */
1667 HOWTO (R_PPC64_GOT_TLSLD16,
1668 0, /* rightshift */
1669 1, /* size (0 = byte, 1 = short, 2 = long) */
1670 16, /* bitsize */
1671 FALSE, /* pc_relative */
1672 0, /* bitpos */
1673 complain_overflow_signed, /* complain_on_overflow */
1674 ppc64_elf_unhandled_reloc, /* special_function */
1675 "R_PPC64_GOT_TLSLD16", /* name */
1676 FALSE, /* partial_inplace */
1677 0, /* src_mask */
1678 0xffff, /* dst_mask */
1679 FALSE), /* pcrel_offset */
1680
1681 /* Like GOT_TLSLD16, but no overflow. */
1682 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1683 0, /* 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_LO", /* name */
1691 FALSE, /* partial_inplace */
1692 0, /* src_mask */
1693 0xffff, /* dst_mask */
1694 FALSE), /* pcrel_offset */
1695
1696 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1697 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1698 16, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_dont, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSLD16_HI", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1712 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1713 16, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSLD16_HA", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1727 the offset to the entry relative to the TOC base (r2). */
1728 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1729 0, /* rightshift */
1730 1, /* size (0 = byte, 1 = short, 2 = long) */
1731 16, /* bitsize */
1732 FALSE, /* pc_relative */
1733 0, /* bitpos */
1734 complain_overflow_signed, /* complain_on_overflow */
1735 ppc64_elf_unhandled_reloc, /* special_function */
1736 "R_PPC64_GOT_DTPREL16_DS", /* name */
1737 FALSE, /* partial_inplace */
1738 0, /* src_mask */
1739 0xfffc, /* dst_mask */
1740 FALSE), /* pcrel_offset */
1741
1742 /* Like GOT_DTPREL16_DS, but no overflow. */
1743 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1744 0, /* 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_LO_DS", /* name */
1752 FALSE, /* partial_inplace */
1753 0, /* src_mask */
1754 0xfffc, /* dst_mask */
1755 FALSE), /* pcrel_offset */
1756
1757 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1758 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1759 16, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_dont, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_DTPREL16_HI", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xffff, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1773 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1774 16, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_DTPREL16_HA", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xffff, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1788 offset to the entry relative to the TOC base (r2). */
1789 HOWTO (R_PPC64_GOT_TPREL16_DS,
1790 0, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TPREL16_DS", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xfffc, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TPREL16_DS, but no overflow. */
1804 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1805 0, /* 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_LO_DS", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xfffc, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1819 HOWTO (R_PPC64_GOT_TPREL16_HI,
1820 16, /* rightshift */
1821 1, /* size (0 = byte, 1 = short, 2 = long) */
1822 16, /* bitsize */
1823 FALSE, /* pc_relative */
1824 0, /* bitpos */
1825 complain_overflow_dont, /* complain_on_overflow */
1826 ppc64_elf_unhandled_reloc, /* special_function */
1827 "R_PPC64_GOT_TPREL16_HI", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0xffff, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1834 HOWTO (R_PPC64_GOT_TPREL16_HA,
1835 16, /* rightshift */
1836 1, /* size (0 = byte, 1 = short, 2 = long) */
1837 16, /* bitsize */
1838 FALSE, /* pc_relative */
1839 0, /* bitpos */
1840 complain_overflow_dont, /* complain_on_overflow */
1841 ppc64_elf_unhandled_reloc, /* special_function */
1842 "R_PPC64_GOT_TPREL16_HA", /* name */
1843 FALSE, /* partial_inplace */
1844 0, /* src_mask */
1845 0xffff, /* dst_mask */
1846 FALSE), /* pcrel_offset */
1847
1848 /* GNU extension to record C++ vtable hierarchy. */
1849 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1850 0, /* rightshift */
1851 0, /* size (0 = byte, 1 = short, 2 = long) */
1852 0, /* bitsize */
1853 FALSE, /* pc_relative */
1854 0, /* bitpos */
1855 complain_overflow_dont, /* complain_on_overflow */
1856 NULL, /* special_function */
1857 "R_PPC64_GNU_VTINHERIT", /* name */
1858 FALSE, /* partial_inplace */
1859 0, /* src_mask */
1860 0, /* dst_mask */
1861 FALSE), /* pcrel_offset */
1862
1863 /* GNU extension to record C++ vtable member usage. */
1864 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1865 0, /* rightshift */
1866 0, /* size (0 = byte, 1 = short, 2 = long) */
1867 0, /* bitsize */
1868 FALSE, /* pc_relative */
1869 0, /* bitpos */
1870 complain_overflow_dont, /* complain_on_overflow */
1871 NULL, /* special_function */
1872 "R_PPC64_GNU_VTENTRY", /* name */
1873 FALSE, /* partial_inplace */
1874 0, /* src_mask */
1875 0, /* dst_mask */
1876 FALSE), /* pcrel_offset */
1877 };
1878
1879 \f
1880 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1881 be done. */
1882
1883 static void
1884 ppc_howto_init (void)
1885 {
1886 unsigned int i, type;
1887
1888 for (i = 0;
1889 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1890 i++)
1891 {
1892 type = ppc64_elf_howto_raw[i].type;
1893 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1894 / sizeof (ppc64_elf_howto_table[0])));
1895 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1896 }
1897 }
1898
1899 static reloc_howto_type *
1900 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1901 bfd_reloc_code_real_type code)
1902 {
1903 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1904
1905 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1906 /* Initialize howto table if needed. */
1907 ppc_howto_init ();
1908
1909 switch (code)
1910 {
1911 default:
1912 return NULL;
1913
1914 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1915 break;
1916 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1917 break;
1918 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1919 break;
1920 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1921 break;
1922 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1923 break;
1924 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1925 break;
1926 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1927 break;
1928 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1929 break;
1930 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1931 break;
1932 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1933 break;
1934 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1935 break;
1936 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1937 break;
1938 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1939 break;
1940 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1941 break;
1942 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1943 break;
1944 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1945 break;
1946 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1947 break;
1948 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1949 break;
1950 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1951 break;
1952 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1953 break;
1954 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1955 break;
1956 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1957 break;
1958 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1959 break;
1960 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1961 break;
1962 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1963 break;
1964 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1965 break;
1966 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1967 break;
1968 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1969 break;
1970 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1971 break;
1972 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1973 break;
1974 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1975 break;
1976 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1977 break;
1978 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1979 break;
1980 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1981 break;
1982 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1983 break;
1984 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1985 break;
1986 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1987 break;
1988 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1989 break;
1990 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1991 break;
1992 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1993 break;
1994 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1995 break;
1996 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1997 break;
1998 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1999 break;
2000 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2001 break;
2002 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2003 break;
2004 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2005 break;
2006 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2007 break;
2008 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2009 break;
2010 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2011 break;
2012 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2013 break;
2014 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2015 break;
2016 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2017 break;
2018 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2019 break;
2020 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2021 break;
2022 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2023 break;
2024 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2025 break;
2026 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2027 break;
2028 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2029 break;
2030 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2031 break;
2032 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2033 break;
2034 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2035 break;
2036 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2037 break;
2038 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2039 break;
2040 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2041 break;
2042 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2043 break;
2044 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2045 break;
2046 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2047 break;
2048 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2049 break;
2050 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2051 break;
2052 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2053 break;
2054 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2067 break;
2068 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2069 break;
2070 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2071 break;
2072 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2073 break;
2074 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2075 break;
2076 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2077 break;
2078 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2079 break;
2080 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2081 break;
2082 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2083 break;
2084 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2085 break;
2086 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2087 break;
2088 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2089 break;
2090 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2091 break;
2092 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2093 break;
2094 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2095 break;
2096 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2097 break;
2098 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2099 break;
2100 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2101 break;
2102 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2103 break;
2104 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2105 break;
2106 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2107 break;
2108 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2109 break;
2110 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2111 break;
2112 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2113 break;
2114 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2115 break;
2116 }
2117
2118 return ppc64_elf_howto_table[r];
2119 };
2120
2121 static reloc_howto_type *
2122 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2123 const char *r_name)
2124 {
2125 unsigned int i;
2126
2127 for (i = 0;
2128 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2129 i++)
2130 if (ppc64_elf_howto_raw[i].name != NULL
2131 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2132 return &ppc64_elf_howto_raw[i];
2133
2134 return NULL;
2135 }
2136
2137 /* Set the howto pointer for a PowerPC ELF reloc. */
2138
2139 static void
2140 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2141 Elf_Internal_Rela *dst)
2142 {
2143 unsigned int type;
2144
2145 /* Initialize howto table if needed. */
2146 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2147 ppc_howto_init ();
2148
2149 type = ELF64_R_TYPE (dst->r_info);
2150 if (type >= (sizeof (ppc64_elf_howto_table)
2151 / sizeof (ppc64_elf_howto_table[0])))
2152 {
2153 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2154 abfd, (int) type);
2155 type = R_PPC64_NONE;
2156 }
2157 cache_ptr->howto = ppc64_elf_howto_table[type];
2158 }
2159
2160 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2161
2162 static bfd_reloc_status_type
2163 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2164 void *data, asection *input_section,
2165 bfd *output_bfd, char **error_message)
2166 {
2167 /* If this is a relocatable link (output_bfd test tells us), just
2168 call the generic function. Any adjustment will be done at final
2169 link time. */
2170 if (output_bfd != NULL)
2171 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2172 input_section, output_bfd, error_message);
2173
2174 /* Adjust the addend for sign extension of the low 16 bits.
2175 We won't actually be using the low 16 bits, so trashing them
2176 doesn't matter. */
2177 reloc_entry->addend += 0x8000;
2178 return bfd_reloc_continue;
2179 }
2180
2181 static bfd_reloc_status_type
2182 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2183 void *data, asection *input_section,
2184 bfd *output_bfd, char **error_message)
2185 {
2186 if (output_bfd != NULL)
2187 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2188 input_section, output_bfd, error_message);
2189
2190 if (strcmp (symbol->section->name, ".opd") == 0
2191 && (symbol->section->owner->flags & DYNAMIC) == 0)
2192 {
2193 bfd_vma dest = opd_entry_value (symbol->section,
2194 symbol->value + reloc_entry->addend,
2195 NULL, NULL);
2196 if (dest != (bfd_vma) -1)
2197 reloc_entry->addend = dest - (symbol->value
2198 + symbol->section->output_section->vma
2199 + symbol->section->output_offset);
2200 }
2201 return bfd_reloc_continue;
2202 }
2203
2204 static bfd_reloc_status_type
2205 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2206 void *data, asection *input_section,
2207 bfd *output_bfd, char **error_message)
2208 {
2209 long insn;
2210 enum elf_ppc64_reloc_type r_type;
2211 bfd_size_type octets;
2212 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2213 bfd_boolean is_power4 = FALSE;
2214
2215 /* If this is a relocatable link (output_bfd test tells us), just
2216 call the generic function. Any adjustment will be done at final
2217 link time. */
2218 if (output_bfd != NULL)
2219 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2220 input_section, output_bfd, error_message);
2221
2222 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2223 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2224 insn &= ~(0x01 << 21);
2225 r_type = reloc_entry->howto->type;
2226 if (r_type == R_PPC64_ADDR14_BRTAKEN
2227 || r_type == R_PPC64_REL14_BRTAKEN)
2228 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2229
2230 if (is_power4)
2231 {
2232 /* Set 'a' bit. This is 0b00010 in BO field for branch
2233 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2234 for branch on CTR insns (BO == 1a00t or 1a01t). */
2235 if ((insn & (0x14 << 21)) == (0x04 << 21))
2236 insn |= 0x02 << 21;
2237 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2238 insn |= 0x08 << 21;
2239 else
2240 goto out;
2241 }
2242 else
2243 {
2244 bfd_vma target = 0;
2245 bfd_vma from;
2246
2247 if (!bfd_is_com_section (symbol->section))
2248 target = symbol->value;
2249 target += symbol->section->output_section->vma;
2250 target += symbol->section->output_offset;
2251 target += reloc_entry->addend;
2252
2253 from = (reloc_entry->address
2254 + input_section->output_offset
2255 + input_section->output_section->vma);
2256
2257 /* Invert 'y' bit if not the default. */
2258 if ((bfd_signed_vma) (target - from) < 0)
2259 insn ^= 0x01 << 21;
2260 }
2261 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2262 out:
2263 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message);
2265 }
2266
2267 static bfd_reloc_status_type
2268 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2269 void *data, asection *input_section,
2270 bfd *output_bfd, char **error_message)
2271 {
2272 /* If this is a relocatable link (output_bfd test tells us), just
2273 call the generic function. Any adjustment will be done at final
2274 link time. */
2275 if (output_bfd != NULL)
2276 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2277 input_section, output_bfd, error_message);
2278
2279 /* Subtract the symbol section base address. */
2280 reloc_entry->addend -= symbol->section->output_section->vma;
2281 return bfd_reloc_continue;
2282 }
2283
2284 static bfd_reloc_status_type
2285 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2286 void *data, asection *input_section,
2287 bfd *output_bfd, char **error_message)
2288 {
2289 /* If this is a relocatable link (output_bfd test tells us), just
2290 call the generic function. Any adjustment will be done at final
2291 link time. */
2292 if (output_bfd != NULL)
2293 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2294 input_section, output_bfd, error_message);
2295
2296 /* Subtract the symbol section base address. */
2297 reloc_entry->addend -= symbol->section->output_section->vma;
2298
2299 /* Adjust the addend for sign extension of the low 16 bits. */
2300 reloc_entry->addend += 0x8000;
2301 return bfd_reloc_continue;
2302 }
2303
2304 static bfd_reloc_status_type
2305 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2306 void *data, asection *input_section,
2307 bfd *output_bfd, char **error_message)
2308 {
2309 bfd_vma TOCstart;
2310
2311 /* If this is a relocatable link (output_bfd test tells us), just
2312 call the generic function. Any adjustment will be done at final
2313 link time. */
2314 if (output_bfd != NULL)
2315 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2316 input_section, output_bfd, error_message);
2317
2318 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2319 if (TOCstart == 0)
2320 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2321
2322 /* Subtract the TOC base address. */
2323 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2324 return bfd_reloc_continue;
2325 }
2326
2327 static bfd_reloc_status_type
2328 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2329 void *data, asection *input_section,
2330 bfd *output_bfd, char **error_message)
2331 {
2332 bfd_vma TOCstart;
2333
2334 /* If this is a relocatable link (output_bfd test tells us), just
2335 call the generic function. Any adjustment will be done at final
2336 link time. */
2337 if (output_bfd != NULL)
2338 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2339 input_section, output_bfd, error_message);
2340
2341 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2342 if (TOCstart == 0)
2343 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2344
2345 /* Subtract the TOC base address. */
2346 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2347
2348 /* Adjust the addend for sign extension of the low 16 bits. */
2349 reloc_entry->addend += 0x8000;
2350 return bfd_reloc_continue;
2351 }
2352
2353 static bfd_reloc_status_type
2354 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2355 void *data, asection *input_section,
2356 bfd *output_bfd, char **error_message)
2357 {
2358 bfd_vma TOCstart;
2359 bfd_size_type octets;
2360
2361 /* If this is a relocatable link (output_bfd test tells us), just
2362 call the generic function. Any adjustment will be done at final
2363 link time. */
2364 if (output_bfd != NULL)
2365 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2366 input_section, output_bfd, error_message);
2367
2368 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2369 if (TOCstart == 0)
2370 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2371
2372 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2373 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2374 return bfd_reloc_ok;
2375 }
2376
2377 static bfd_reloc_status_type
2378 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2379 void *data, asection *input_section,
2380 bfd *output_bfd, char **error_message)
2381 {
2382 /* If this is a relocatable link (output_bfd test tells us), just
2383 call the generic function. Any adjustment will be done at final
2384 link time. */
2385 if (output_bfd != NULL)
2386 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2387 input_section, output_bfd, error_message);
2388
2389 if (error_message != NULL)
2390 {
2391 static char buf[60];
2392 sprintf (buf, "generic linker can't handle %s",
2393 reloc_entry->howto->name);
2394 *error_message = buf;
2395 }
2396 return bfd_reloc_dangerous;
2397 }
2398
2399 struct ppc64_elf_obj_tdata
2400 {
2401 struct elf_obj_tdata elf;
2402
2403 /* Shortcuts to dynamic linker sections. */
2404 asection *got;
2405 asection *relgot;
2406
2407 /* Used during garbage collection. We attach global symbols defined
2408 on removed .opd entries to this section so that the sym is removed. */
2409 asection *deleted_section;
2410
2411 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2412 sections means we potentially need one of these for each input bfd. */
2413 union {
2414 bfd_signed_vma refcount;
2415 bfd_vma offset;
2416 } tlsld_got;
2417
2418 /* A copy of relocs before they are modified for --emit-relocs. */
2419 Elf_Internal_Rela *opd_relocs;
2420 };
2421
2422 #define ppc64_elf_tdata(bfd) \
2423 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2424
2425 #define ppc64_tlsld_got(bfd) \
2426 (&ppc64_elf_tdata (bfd)->tlsld_got)
2427
2428 /* Override the generic function because we store some extras. */
2429
2430 static bfd_boolean
2431 ppc64_elf_mkobject (bfd *abfd)
2432 {
2433 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2434 PPC64_ELF_TDATA);
2435 }
2436
2437 /* Return 1 if target is one of ours. */
2438
2439 static bfd_boolean
2440 is_ppc64_elf_target (const struct bfd_target *targ)
2441 {
2442 extern const bfd_target bfd_elf64_powerpc_vec;
2443 extern const bfd_target bfd_elf64_powerpcle_vec;
2444
2445 return targ == &bfd_elf64_powerpc_vec || targ == &bfd_elf64_powerpcle_vec;
2446 }
2447
2448 /* Fix bad default arch selected for a 64 bit input bfd when the
2449 default is 32 bit. */
2450
2451 static bfd_boolean
2452 ppc64_elf_object_p (bfd *abfd)
2453 {
2454 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2455 {
2456 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2457
2458 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2459 {
2460 /* Relies on arch after 32 bit default being 64 bit default. */
2461 abfd->arch_info = abfd->arch_info->next;
2462 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2463 }
2464 }
2465 return TRUE;
2466 }
2467
2468 /* Support for core dump NOTE sections. */
2469
2470 static bfd_boolean
2471 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2472 {
2473 size_t offset, size;
2474
2475 if (note->descsz != 504)
2476 return FALSE;
2477
2478 /* pr_cursig */
2479 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2480
2481 /* pr_pid */
2482 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2483
2484 /* pr_reg */
2485 offset = 112;
2486 size = 384;
2487
2488 /* Make a ".reg/999" section. */
2489 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2490 size, note->descpos + offset);
2491 }
2492
2493 static bfd_boolean
2494 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2495 {
2496 if (note->descsz != 136)
2497 return FALSE;
2498
2499 elf_tdata (abfd)->core_program
2500 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2501 elf_tdata (abfd)->core_command
2502 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2503
2504 return TRUE;
2505 }
2506
2507 static char *
2508 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2509 ...)
2510 {
2511 switch (note_type)
2512 {
2513 default:
2514 return NULL;
2515
2516 case NT_PRPSINFO:
2517 {
2518 char data[136];
2519 va_list ap;
2520
2521 va_start (ap, note_type);
2522 memset (data, 0, 40);
2523 strncpy (data + 40, va_arg (ap, const char *), 16);
2524 strncpy (data + 56, va_arg (ap, const char *), 80);
2525 va_end (ap);
2526 return elfcore_write_note (abfd, buf, bufsiz,
2527 "CORE", note_type, data, sizeof (data));
2528 }
2529
2530 case NT_PRSTATUS:
2531 {
2532 char data[504];
2533 va_list ap;
2534 long pid;
2535 int cursig;
2536 const void *greg;
2537
2538 va_start (ap, note_type);
2539 memset (data, 0, 112);
2540 pid = va_arg (ap, long);
2541 bfd_put_32 (abfd, pid, data + 32);
2542 cursig = va_arg (ap, int);
2543 bfd_put_16 (abfd, cursig, data + 12);
2544 greg = va_arg (ap, const void *);
2545 memcpy (data + 112, greg, 384);
2546 memset (data + 496, 0, 8);
2547 va_end (ap);
2548 return elfcore_write_note (abfd, buf, bufsiz,
2549 "CORE", note_type, data, sizeof (data));
2550 }
2551 }
2552 }
2553
2554 /* Merge backend specific data from an object file to the output
2555 object file when linking. */
2556
2557 static bfd_boolean
2558 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2559 {
2560 /* Check if we have the same endianess. */
2561 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2562 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2563 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2564 {
2565 const char *msg;
2566
2567 if (bfd_big_endian (ibfd))
2568 msg = _("%B: compiled for a big endian system "
2569 "and target is little endian");
2570 else
2571 msg = _("%B: compiled for a little endian system "
2572 "and target is big endian");
2573
2574 (*_bfd_error_handler) (msg, ibfd);
2575
2576 bfd_set_error (bfd_error_wrong_format);
2577 return FALSE;
2578 }
2579
2580 return TRUE;
2581 }
2582
2583 /* Add extra PPC sections. */
2584
2585 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2586 {
2587 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2588 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2589 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2590 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2591 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2592 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2593 { NULL, 0, 0, 0, 0 }
2594 };
2595
2596 enum _ppc64_sec_type {
2597 sec_normal = 0,
2598 sec_opd = 1,
2599 sec_toc = 2
2600 };
2601
2602 struct _ppc64_elf_section_data
2603 {
2604 struct bfd_elf_section_data elf;
2605
2606 union
2607 {
2608 /* An array with one entry for each opd function descriptor. */
2609 struct _opd_sec_data
2610 {
2611 /* Points to the function code section for local opd entries. */
2612 asection **func_sec;
2613
2614 /* After editing .opd, adjust references to opd local syms. */
2615 long *adjust;
2616 } opd;
2617
2618 /* An array for toc sections, indexed by offset/8.
2619 Specifies the relocation symbol index used at a given toc offset. */
2620 unsigned *t_symndx;
2621 } u;
2622
2623 enum _ppc64_sec_type sec_type:2;
2624
2625 /* Flag set when small branches are detected. Used to
2626 select suitable defaults for the stub group size. */
2627 unsigned int has_14bit_branch:1;
2628 };
2629
2630 #define ppc64_elf_section_data(sec) \
2631 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2632
2633 static bfd_boolean
2634 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2635 {
2636 if (!sec->used_by_bfd)
2637 {
2638 struct _ppc64_elf_section_data *sdata;
2639 bfd_size_type amt = sizeof (*sdata);
2640
2641 sdata = bfd_zalloc (abfd, amt);
2642 if (sdata == NULL)
2643 return FALSE;
2644 sec->used_by_bfd = sdata;
2645 }
2646
2647 return _bfd_elf_new_section_hook (abfd, sec);
2648 }
2649
2650 static struct _opd_sec_data *
2651 get_opd_info (asection * sec)
2652 {
2653 if (sec != NULL
2654 && ppc64_elf_section_data (sec) != NULL
2655 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2656 return &ppc64_elf_section_data (sec)->u.opd;
2657 return NULL;
2658 }
2659 \f
2660 /* Parameters for the qsort hook. */
2661 static asection *synthetic_opd;
2662 static bfd_boolean synthetic_relocatable;
2663
2664 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2665
2666 static int
2667 compare_symbols (const void *ap, const void *bp)
2668 {
2669 const asymbol *a = * (const asymbol **) ap;
2670 const asymbol *b = * (const asymbol **) bp;
2671
2672 /* Section symbols first. */
2673 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2674 return -1;
2675 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2676 return 1;
2677
2678 /* then .opd symbols. */
2679 if (a->section == synthetic_opd && b->section != synthetic_opd)
2680 return -1;
2681 if (a->section != synthetic_opd && b->section == synthetic_opd)
2682 return 1;
2683
2684 /* then other code symbols. */
2685 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2686 == (SEC_CODE | SEC_ALLOC)
2687 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2688 != (SEC_CODE | SEC_ALLOC))
2689 return -1;
2690
2691 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2692 != (SEC_CODE | SEC_ALLOC)
2693 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2694 == (SEC_CODE | SEC_ALLOC))
2695 return 1;
2696
2697 if (synthetic_relocatable)
2698 {
2699 if (a->section->id < b->section->id)
2700 return -1;
2701
2702 if (a->section->id > b->section->id)
2703 return 1;
2704 }
2705
2706 if (a->value + a->section->vma < b->value + b->section->vma)
2707 return -1;
2708
2709 if (a->value + a->section->vma > b->value + b->section->vma)
2710 return 1;
2711
2712 /* For syms with the same value, prefer strong dynamic global function
2713 syms over other syms. */
2714 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2715 return -1;
2716
2717 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2718 return 1;
2719
2720 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2721 return -1;
2722
2723 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2724 return 1;
2725
2726 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2727 return -1;
2728
2729 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2730 return 1;
2731
2732 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2733 return -1;
2734
2735 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2736 return 1;
2737
2738 return 0;
2739 }
2740
2741 /* Search SYMS for a symbol of the given VALUE. */
2742
2743 static asymbol *
2744 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2745 {
2746 long mid;
2747
2748 if (id == -1)
2749 {
2750 while (lo < hi)
2751 {
2752 mid = (lo + hi) >> 1;
2753 if (syms[mid]->value + syms[mid]->section->vma < value)
2754 lo = mid + 1;
2755 else if (syms[mid]->value + syms[mid]->section->vma > value)
2756 hi = mid;
2757 else
2758 return syms[mid];
2759 }
2760 }
2761 else
2762 {
2763 while (lo < hi)
2764 {
2765 mid = (lo + hi) >> 1;
2766 if (syms[mid]->section->id < id)
2767 lo = mid + 1;
2768 else if (syms[mid]->section->id > id)
2769 hi = mid;
2770 else if (syms[mid]->value < value)
2771 lo = mid + 1;
2772 else if (syms[mid]->value > value)
2773 hi = mid;
2774 else
2775 return syms[mid];
2776 }
2777 }
2778 return NULL;
2779 }
2780
2781 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2782 entry syms. */
2783
2784 static long
2785 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2786 long static_count, asymbol **static_syms,
2787 long dyn_count, asymbol **dyn_syms,
2788 asymbol **ret)
2789 {
2790 asymbol *s;
2791 long i;
2792 long count;
2793 char *names;
2794 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2795 asection *opd;
2796 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2797 asymbol **syms;
2798
2799 *ret = NULL;
2800
2801 opd = bfd_get_section_by_name (abfd, ".opd");
2802 if (opd == NULL)
2803 return 0;
2804
2805 symcount = static_count;
2806 if (!relocatable)
2807 symcount += dyn_count;
2808 if (symcount == 0)
2809 return 0;
2810
2811 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2812 if (syms == NULL)
2813 return -1;
2814
2815 if (!relocatable && static_count != 0 && dyn_count != 0)
2816 {
2817 /* Use both symbol tables. */
2818 memcpy (syms, static_syms, static_count * sizeof (*syms));
2819 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2820 }
2821 else if (!relocatable && static_count == 0)
2822 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2823 else
2824 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2825
2826 synthetic_opd = opd;
2827 synthetic_relocatable = relocatable;
2828 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2829
2830 if (!relocatable && symcount > 1)
2831 {
2832 long j;
2833 /* Trim duplicate syms, since we may have merged the normal and
2834 dynamic symbols. Actually, we only care about syms that have
2835 different values, so trim any with the same value. */
2836 for (i = 1, j = 1; i < symcount; ++i)
2837 if (syms[i - 1]->value + syms[i - 1]->section->vma
2838 != syms[i]->value + syms[i]->section->vma)
2839 syms[j++] = syms[i];
2840 symcount = j;
2841 }
2842
2843 i = 0;
2844 if (syms[i]->section == opd)
2845 ++i;
2846 codesecsym = i;
2847
2848 for (; i < symcount; ++i)
2849 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2850 != (SEC_CODE | SEC_ALLOC))
2851 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2852 break;
2853 codesecsymend = i;
2854
2855 for (; i < symcount; ++i)
2856 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2857 break;
2858 secsymend = i;
2859
2860 for (; i < symcount; ++i)
2861 if (syms[i]->section != opd)
2862 break;
2863 opdsymend = i;
2864
2865 for (; i < symcount; ++i)
2866 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 != (SEC_CODE | SEC_ALLOC))
2868 break;
2869 symcount = i;
2870
2871 count = 0;
2872 if (opdsymend == secsymend)
2873 goto done;
2874
2875 if (relocatable)
2876 {
2877 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2878 arelent *r;
2879 size_t size;
2880 long relcount;
2881
2882 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2883 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2884 if (relcount == 0)
2885 goto done;
2886
2887 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2888 {
2889 count = -1;
2890 goto done;
2891 }
2892
2893 size = 0;
2894 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2895 {
2896 asymbol *sym;
2897
2898 while (r < opd->relocation + relcount
2899 && r->address < syms[i]->value + opd->vma)
2900 ++r;
2901
2902 if (r == opd->relocation + relcount)
2903 break;
2904
2905 if (r->address != syms[i]->value + opd->vma)
2906 continue;
2907
2908 if (r->howto->type != R_PPC64_ADDR64)
2909 continue;
2910
2911 sym = *r->sym_ptr_ptr;
2912 if (!sym_exists_at (syms, opdsymend, symcount,
2913 sym->section->id, sym->value + r->addend))
2914 {
2915 ++count;
2916 size += sizeof (asymbol);
2917 size += strlen (syms[i]->name) + 2;
2918 }
2919 }
2920
2921 s = *ret = bfd_malloc (size);
2922 if (s == NULL)
2923 {
2924 count = -1;
2925 goto done;
2926 }
2927
2928 names = (char *) (s + count);
2929
2930 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2931 {
2932 asymbol *sym;
2933
2934 while (r < opd->relocation + relcount
2935 && r->address < syms[i]->value + opd->vma)
2936 ++r;
2937
2938 if (r == opd->relocation + relcount)
2939 break;
2940
2941 if (r->address != syms[i]->value + opd->vma)
2942 continue;
2943
2944 if (r->howto->type != R_PPC64_ADDR64)
2945 continue;
2946
2947 sym = *r->sym_ptr_ptr;
2948 if (!sym_exists_at (syms, opdsymend, symcount,
2949 sym->section->id, sym->value + r->addend))
2950 {
2951 size_t len;
2952
2953 *s = *syms[i];
2954 s->section = sym->section;
2955 s->value = sym->value + r->addend;
2956 s->name = names;
2957 *names++ = '.';
2958 len = strlen (syms[i]->name);
2959 memcpy (names, syms[i]->name, len + 1);
2960 names += len + 1;
2961 /* Have udata.p point back to the original symbol this
2962 synthetic symbol was derived from. */
2963 s->udata.p = syms[i];
2964 s++;
2965 }
2966 }
2967 }
2968 else
2969 {
2970 bfd_byte *contents;
2971 size_t size;
2972
2973 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2974 {
2975 if (contents)
2976 {
2977 free_contents_and_exit:
2978 free (contents);
2979 }
2980 count = -1;
2981 goto done;
2982 }
2983
2984 size = 0;
2985 for (i = secsymend; i < opdsymend; ++i)
2986 {
2987 bfd_vma ent;
2988
2989 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2990 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
2991 {
2992 ++count;
2993 size += sizeof (asymbol);
2994 size += strlen (syms[i]->name) + 2;
2995 }
2996 }
2997
2998 s = *ret = bfd_malloc (size);
2999 if (s == NULL)
3000 goto free_contents_and_exit;
3001
3002 names = (char *) (s + count);
3003
3004 for (i = secsymend; i < opdsymend; ++i)
3005 {
3006 bfd_vma ent;
3007
3008 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3009 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3010 {
3011 long lo, hi;
3012 size_t len;
3013 asection *sec = abfd->sections;
3014
3015 *s = *syms[i];
3016 lo = codesecsym;
3017 hi = codesecsymend;
3018 while (lo < hi)
3019 {
3020 long mid = (lo + hi) >> 1;
3021 if (syms[mid]->section->vma < ent)
3022 lo = mid + 1;
3023 else if (syms[mid]->section->vma > ent)
3024 hi = mid;
3025 else
3026 {
3027 sec = syms[mid]->section;
3028 break;
3029 }
3030 }
3031
3032 if (lo >= hi && lo > codesecsym)
3033 sec = syms[lo - 1]->section;
3034
3035 for (; sec != NULL; sec = sec->next)
3036 {
3037 if (sec->vma > ent)
3038 break;
3039 if ((sec->flags & SEC_ALLOC) == 0
3040 || (sec->flags & SEC_LOAD) == 0)
3041 break;
3042 if ((sec->flags & SEC_CODE) != 0)
3043 s->section = sec;
3044 }
3045 s->value = ent - s->section->vma;
3046 s->name = names;
3047 *names++ = '.';
3048 len = strlen (syms[i]->name);
3049 memcpy (names, syms[i]->name, len + 1);
3050 names += len + 1;
3051 /* Have udata.p point back to the original symbol this
3052 synthetic symbol was derived from. */
3053 s->udata.p = syms[i];
3054 s++;
3055 }
3056 }
3057 free (contents);
3058 }
3059
3060 done:
3061 free (syms);
3062 return count;
3063 }
3064 \f
3065 /* The following functions are specific to the ELF linker, while
3066 functions above are used generally. Those named ppc64_elf_* are
3067 called by the main ELF linker code. They appear in this file more
3068 or less in the order in which they are called. eg.
3069 ppc64_elf_check_relocs is called early in the link process,
3070 ppc64_elf_finish_dynamic_sections is one of the last functions
3071 called.
3072
3073 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3074 functions have both a function code symbol and a function descriptor
3075 symbol. A call to foo in a relocatable object file looks like:
3076
3077 . .text
3078 . x:
3079 . bl .foo
3080 . nop
3081
3082 The function definition in another object file might be:
3083
3084 . .section .opd
3085 . foo: .quad .foo
3086 . .quad .TOC.@tocbase
3087 . .quad 0
3088 .
3089 . .text
3090 . .foo: blr
3091
3092 When the linker resolves the call during a static link, the branch
3093 unsurprisingly just goes to .foo and the .opd information is unused.
3094 If the function definition is in a shared library, things are a little
3095 different: The call goes via a plt call stub, the opd information gets
3096 copied to the plt, and the linker patches the nop.
3097
3098 . x:
3099 . bl .foo_stub
3100 . ld 2,40(1)
3101 .
3102 .
3103 . .foo_stub:
3104 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3105 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3106 . std 2,40(1) # this is the general idea
3107 . ld 11,0(12)
3108 . ld 2,8(12)
3109 . mtctr 11
3110 . ld 11,16(12)
3111 . bctr
3112 .
3113 . .section .plt
3114 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3115
3116 The "reloc ()" notation is supposed to indicate that the linker emits
3117 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3118 copying.
3119
3120 What are the difficulties here? Well, firstly, the relocations
3121 examined by the linker in check_relocs are against the function code
3122 sym .foo, while the dynamic relocation in the plt is emitted against
3123 the function descriptor symbol, foo. Somewhere along the line, we need
3124 to carefully copy dynamic link information from one symbol to the other.
3125 Secondly, the generic part of the elf linker will make .foo a dynamic
3126 symbol as is normal for most other backends. We need foo dynamic
3127 instead, at least for an application final link. However, when
3128 creating a shared library containing foo, we need to have both symbols
3129 dynamic so that references to .foo are satisfied during the early
3130 stages of linking. Otherwise the linker might decide to pull in a
3131 definition from some other object, eg. a static library.
3132
3133 Update: As of August 2004, we support a new convention. Function
3134 calls may use the function descriptor symbol, ie. "bl foo". This
3135 behaves exactly as "bl .foo". */
3136
3137 /* The linker needs to keep track of the number of relocs that it
3138 decides to copy as dynamic relocs in check_relocs for each symbol.
3139 This is so that it can later discard them if they are found to be
3140 unnecessary. We store the information in a field extending the
3141 regular ELF linker hash table. */
3142
3143 struct ppc_dyn_relocs
3144 {
3145 struct ppc_dyn_relocs *next;
3146
3147 /* The input section of the reloc. */
3148 asection *sec;
3149
3150 /* Total number of relocs copied for the input section. */
3151 bfd_size_type count;
3152
3153 /* Number of pc-relative relocs copied for the input section. */
3154 bfd_size_type pc_count;
3155 };
3156
3157 /* Track GOT entries needed for a given symbol. We might need more
3158 than one got entry per symbol. */
3159 struct got_entry
3160 {
3161 struct got_entry *next;
3162
3163 /* The symbol addend that we'll be placing in the GOT. */
3164 bfd_vma addend;
3165
3166 /* Unlike other ELF targets, we use separate GOT entries for the same
3167 symbol referenced from different input files. This is to support
3168 automatic multiple TOC/GOT sections, where the TOC base can vary
3169 from one input file to another. FIXME: After group_sections we
3170 ought to merge entries within the group.
3171
3172 Point to the BFD owning this GOT entry. */
3173 bfd *owner;
3174
3175 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3176 TLS_TPREL or TLS_DTPREL for tls entries. */
3177 char tls_type;
3178
3179 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3180 union
3181 {
3182 bfd_signed_vma refcount;
3183 bfd_vma offset;
3184 } got;
3185 };
3186
3187 /* The same for PLT. */
3188 struct plt_entry
3189 {
3190 struct plt_entry *next;
3191
3192 bfd_vma addend;
3193
3194 union
3195 {
3196 bfd_signed_vma refcount;
3197 bfd_vma offset;
3198 } plt;
3199 };
3200
3201 /* Of those relocs that might be copied as dynamic relocs, this macro
3202 selects those that must be copied when linking a shared library,
3203 even when the symbol is local. */
3204
3205 #define MUST_BE_DYN_RELOC(RTYPE) \
3206 ((RTYPE) != R_PPC64_REL32 \
3207 && (RTYPE) != R_PPC64_REL64 \
3208 && (RTYPE) != R_PPC64_REL30)
3209
3210 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3211 copying dynamic variables from a shared lib into an app's dynbss
3212 section, and instead use a dynamic relocation to point into the
3213 shared lib. With code that gcc generates, it's vital that this be
3214 enabled; In the PowerPC64 ABI, the address of a function is actually
3215 the address of a function descriptor, which resides in the .opd
3216 section. gcc uses the descriptor directly rather than going via the
3217 GOT as some other ABI's do, which means that initialized function
3218 pointers must reference the descriptor. Thus, a function pointer
3219 initialized to the address of a function in a shared library will
3220 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3221 redefines the function descriptor symbol to point to the copy. This
3222 presents a problem as a plt entry for that function is also
3223 initialized from the function descriptor symbol and the copy reloc
3224 may not be initialized first. */
3225 #define ELIMINATE_COPY_RELOCS 1
3226
3227 /* Section name for stubs is the associated section name plus this
3228 string. */
3229 #define STUB_SUFFIX ".stub"
3230
3231 /* Linker stubs.
3232 ppc_stub_long_branch:
3233 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3234 destination, but a 24 bit branch in a stub section will reach.
3235 . b dest
3236
3237 ppc_stub_plt_branch:
3238 Similar to the above, but a 24 bit branch in the stub section won't
3239 reach its destination.
3240 . addis %r12,%r2,xxx@toc@ha
3241 . ld %r11,xxx@toc@l(%r12)
3242 . mtctr %r11
3243 . bctr
3244
3245 ppc_stub_plt_call:
3246 Used to call a function in a shared library. If it so happens that
3247 the plt entry referenced crosses a 64k boundary, then an extra
3248 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3249 . addis %r12,%r2,xxx@toc@ha
3250 . std %r2,40(%r1)
3251 . ld %r11,xxx+0@toc@l(%r12)
3252 . mtctr %r11
3253 . ld %r2,xxx+8@toc@l(%r12)
3254 . ld %r11,xxx+16@toc@l(%r12)
3255 . bctr
3256
3257 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3258 code to adjust the value and save r2 to support multiple toc sections.
3259 A ppc_stub_long_branch with an r2 offset looks like:
3260 . std %r2,40(%r1)
3261 . addis %r2,%r2,off@ha
3262 . addi %r2,%r2,off@l
3263 . b dest
3264
3265 A ppc_stub_plt_branch with an r2 offset looks like:
3266 . std %r2,40(%r1)
3267 . addis %r12,%r2,xxx@toc@ha
3268 . ld %r11,xxx@toc@l(%r12)
3269 . addis %r2,%r2,off@ha
3270 . addi %r2,%r2,off@l
3271 . mtctr %r11
3272 . bctr
3273
3274 In cases where the "addis" instruction would add zero, the "addis" is
3275 omitted and following instructions modified slightly in some cases.
3276 */
3277
3278 enum ppc_stub_type {
3279 ppc_stub_none,
3280 ppc_stub_long_branch,
3281 ppc_stub_long_branch_r2off,
3282 ppc_stub_plt_branch,
3283 ppc_stub_plt_branch_r2off,
3284 ppc_stub_plt_call
3285 };
3286
3287 struct ppc_stub_hash_entry {
3288
3289 /* Base hash table entry structure. */
3290 struct bfd_hash_entry root;
3291
3292 enum ppc_stub_type stub_type;
3293
3294 /* The stub section. */
3295 asection *stub_sec;
3296
3297 /* Offset within stub_sec of the beginning of this stub. */
3298 bfd_vma stub_offset;
3299
3300 /* Given the symbol's value and its section we can determine its final
3301 value when building the stubs (so the stub knows where to jump. */
3302 bfd_vma target_value;
3303 asection *target_section;
3304
3305 /* The symbol table entry, if any, that this was derived from. */
3306 struct ppc_link_hash_entry *h;
3307
3308 /* And the reloc addend that this was derived from. */
3309 bfd_vma addend;
3310
3311 /* Where this stub is being called from, or, in the case of combined
3312 stub sections, the first input section in the group. */
3313 asection *id_sec;
3314 };
3315
3316 struct ppc_branch_hash_entry {
3317
3318 /* Base hash table entry structure. */
3319 struct bfd_hash_entry root;
3320
3321 /* Offset within branch lookup table. */
3322 unsigned int offset;
3323
3324 /* Generation marker. */
3325 unsigned int iter;
3326 };
3327
3328 struct ppc_link_hash_entry
3329 {
3330 struct elf_link_hash_entry elf;
3331
3332 union {
3333 /* A pointer to the most recently used stub hash entry against this
3334 symbol. */
3335 struct ppc_stub_hash_entry *stub_cache;
3336
3337 /* A pointer to the next symbol starting with a '.' */
3338 struct ppc_link_hash_entry *next_dot_sym;
3339 } u;
3340
3341 /* Track dynamic relocs copied for this symbol. */
3342 struct ppc_dyn_relocs *dyn_relocs;
3343
3344 /* Link between function code and descriptor symbols. */
3345 struct ppc_link_hash_entry *oh;
3346
3347 /* Flag function code and descriptor symbols. */
3348 unsigned int is_func:1;
3349 unsigned int is_func_descriptor:1;
3350 unsigned int fake:1;
3351
3352 /* Whether global opd/toc sym has been adjusted or not.
3353 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3354 should be set for all globals defined in any opd/toc section. */
3355 unsigned int adjust_done:1;
3356
3357 /* Set if we twiddled this symbol to weak at some stage. */
3358 unsigned int was_undefined:1;
3359
3360 /* Contexts in which symbol is used in the GOT (or TOC).
3361 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3362 corresponding relocs are encountered during check_relocs.
3363 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3364 indicate the corresponding GOT entry type is not needed.
3365 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3366 a TPREL one. We use a separate flag rather than setting TPREL
3367 just for convenience in distinguishing the two cases. */
3368 #define TLS_GD 1 /* GD reloc. */
3369 #define TLS_LD 2 /* LD reloc. */
3370 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3371 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3372 #define TLS_TLS 16 /* Any TLS reloc. */
3373 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3374 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3375 char tls_mask;
3376 };
3377
3378 /* ppc64 ELF linker hash table. */
3379
3380 struct ppc_link_hash_table
3381 {
3382 struct elf_link_hash_table elf;
3383
3384 /* The stub hash table. */
3385 struct bfd_hash_table stub_hash_table;
3386
3387 /* Another hash table for plt_branch stubs. */
3388 struct bfd_hash_table branch_hash_table;
3389
3390 /* Linker stub bfd. */
3391 bfd *stub_bfd;
3392
3393 /* Linker call-backs. */
3394 asection * (*add_stub_section) (const char *, asection *);
3395 void (*layout_sections_again) (void);
3396
3397 /* Array to keep track of which stub sections have been created, and
3398 information on stub grouping. */
3399 struct map_stub {
3400 /* This is the section to which stubs in the group will be attached. */
3401 asection *link_sec;
3402 /* The stub section. */
3403 asection *stub_sec;
3404 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3405 bfd_vma toc_off;
3406 } *stub_group;
3407
3408 /* Temp used when calculating TOC pointers. */
3409 bfd_vma toc_curr;
3410
3411 /* Highest input section id. */
3412 int top_id;
3413
3414 /* Highest output section index. */
3415 int top_index;
3416
3417 /* Used when adding symbols. */
3418 struct ppc_link_hash_entry *dot_syms;
3419
3420 /* List of input sections for each output section. */
3421 asection **input_list;
3422
3423 /* Short-cuts to get to dynamic linker sections. */
3424 asection *got;
3425 asection *plt;
3426 asection *relplt;
3427 asection *dynbss;
3428 asection *relbss;
3429 asection *glink;
3430 asection *sfpr;
3431 asection *brlt;
3432 asection *relbrlt;
3433
3434 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3435 struct ppc_link_hash_entry *tls_get_addr;
3436 struct ppc_link_hash_entry *tls_get_addr_fd;
3437
3438 /* Statistics. */
3439 unsigned long stub_count[ppc_stub_plt_call];
3440
3441 /* Number of stubs against global syms. */
3442 unsigned long stub_globals;
3443
3444 /* Set if we should emit symbols for stubs. */
3445 unsigned int emit_stub_syms:1;
3446
3447 /* Support for multiple toc sections. */
3448 unsigned int no_multi_toc:1;
3449 unsigned int multi_toc_needed:1;
3450
3451 /* Set on error. */
3452 unsigned int stub_error:1;
3453
3454 /* Temp used by ppc64_elf_check_directives. */
3455 unsigned int twiddled_syms:1;
3456
3457 /* Incremented every time we size stubs. */
3458 unsigned int stub_iteration;
3459
3460 /* Small local sym to section mapping cache. */
3461 struct sym_sec_cache sym_sec;
3462 };
3463
3464 /* Rename some of the generic section flags to better document how they
3465 are used here. */
3466 #define has_toc_reloc has_gp_reloc
3467 #define makes_toc_func_call need_finalize_relax
3468 #define call_check_in_progress reloc_done
3469
3470 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3471
3472 #define ppc_hash_table(p) \
3473 ((struct ppc_link_hash_table *) ((p)->hash))
3474
3475 #define ppc_stub_hash_lookup(table, string, create, copy) \
3476 ((struct ppc_stub_hash_entry *) \
3477 bfd_hash_lookup ((table), (string), (create), (copy)))
3478
3479 #define ppc_branch_hash_lookup(table, string, create, copy) \
3480 ((struct ppc_branch_hash_entry *) \
3481 bfd_hash_lookup ((table), (string), (create), (copy)))
3482
3483 /* Create an entry in the stub hash table. */
3484
3485 static struct bfd_hash_entry *
3486 stub_hash_newfunc (struct bfd_hash_entry *entry,
3487 struct bfd_hash_table *table,
3488 const char *string)
3489 {
3490 /* Allocate the structure if it has not already been allocated by a
3491 subclass. */
3492 if (entry == NULL)
3493 {
3494 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3495 if (entry == NULL)
3496 return entry;
3497 }
3498
3499 /* Call the allocation method of the superclass. */
3500 entry = bfd_hash_newfunc (entry, table, string);
3501 if (entry != NULL)
3502 {
3503 struct ppc_stub_hash_entry *eh;
3504
3505 /* Initialize the local fields. */
3506 eh = (struct ppc_stub_hash_entry *) entry;
3507 eh->stub_type = ppc_stub_none;
3508 eh->stub_sec = NULL;
3509 eh->stub_offset = 0;
3510 eh->target_value = 0;
3511 eh->target_section = NULL;
3512 eh->h = NULL;
3513 eh->id_sec = NULL;
3514 }
3515
3516 return entry;
3517 }
3518
3519 /* Create an entry in the branch hash table. */
3520
3521 static struct bfd_hash_entry *
3522 branch_hash_newfunc (struct bfd_hash_entry *entry,
3523 struct bfd_hash_table *table,
3524 const char *string)
3525 {
3526 /* Allocate the structure if it has not already been allocated by a
3527 subclass. */
3528 if (entry == NULL)
3529 {
3530 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3531 if (entry == NULL)
3532 return entry;
3533 }
3534
3535 /* Call the allocation method of the superclass. */
3536 entry = bfd_hash_newfunc (entry, table, string);
3537 if (entry != NULL)
3538 {
3539 struct ppc_branch_hash_entry *eh;
3540
3541 /* Initialize the local fields. */
3542 eh = (struct ppc_branch_hash_entry *) entry;
3543 eh->offset = 0;
3544 eh->iter = 0;
3545 }
3546
3547 return entry;
3548 }
3549
3550 /* Create an entry in a ppc64 ELF linker hash table. */
3551
3552 static struct bfd_hash_entry *
3553 link_hash_newfunc (struct bfd_hash_entry *entry,
3554 struct bfd_hash_table *table,
3555 const char *string)
3556 {
3557 /* Allocate the structure if it has not already been allocated by a
3558 subclass. */
3559 if (entry == NULL)
3560 {
3561 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3562 if (entry == NULL)
3563 return entry;
3564 }
3565
3566 /* Call the allocation method of the superclass. */
3567 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3568 if (entry != NULL)
3569 {
3570 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3571
3572 memset (&eh->u.stub_cache, 0,
3573 (sizeof (struct ppc_link_hash_entry)
3574 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3575
3576 /* When making function calls, old ABI code references function entry
3577 points (dot symbols), while new ABI code references the function
3578 descriptor symbol. We need to make any combination of reference and
3579 definition work together, without breaking archive linking.
3580
3581 For a defined function "foo" and an undefined call to "bar":
3582 An old object defines "foo" and ".foo", references ".bar" (possibly
3583 "bar" too).
3584 A new object defines "foo" and references "bar".
3585
3586 A new object thus has no problem with its undefined symbols being
3587 satisfied by definitions in an old object. On the other hand, the
3588 old object won't have ".bar" satisfied by a new object.
3589
3590 Keep a list of newly added dot-symbols. */
3591
3592 if (string[0] == '.')
3593 {
3594 struct ppc_link_hash_table *htab;
3595
3596 htab = (struct ppc_link_hash_table *) table;
3597 eh->u.next_dot_sym = htab->dot_syms;
3598 htab->dot_syms = eh;
3599 }
3600 }
3601
3602 return entry;
3603 }
3604
3605 /* Create a ppc64 ELF linker hash table. */
3606
3607 static struct bfd_link_hash_table *
3608 ppc64_elf_link_hash_table_create (bfd *abfd)
3609 {
3610 struct ppc_link_hash_table *htab;
3611 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3612
3613 htab = bfd_zmalloc (amt);
3614 if (htab == NULL)
3615 return NULL;
3616
3617 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3618 sizeof (struct ppc_link_hash_entry)))
3619 {
3620 free (htab);
3621 return NULL;
3622 }
3623
3624 /* Init the stub hash table too. */
3625 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3626 sizeof (struct ppc_stub_hash_entry)))
3627 return NULL;
3628
3629 /* And the branch hash table. */
3630 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3631 sizeof (struct ppc_branch_hash_entry)))
3632 return NULL;
3633
3634 /* Initializing two fields of the union is just cosmetic. We really
3635 only care about glist, but when compiled on a 32-bit host the
3636 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3637 debugger inspection of these fields look nicer. */
3638 htab->elf.init_got_refcount.refcount = 0;
3639 htab->elf.init_got_refcount.glist = NULL;
3640 htab->elf.init_plt_refcount.refcount = 0;
3641 htab->elf.init_plt_refcount.glist = NULL;
3642 htab->elf.init_got_offset.offset = 0;
3643 htab->elf.init_got_offset.glist = NULL;
3644 htab->elf.init_plt_offset.offset = 0;
3645 htab->elf.init_plt_offset.glist = NULL;
3646
3647 return &htab->elf.root;
3648 }
3649
3650 /* Free the derived linker hash table. */
3651
3652 static void
3653 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3654 {
3655 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3656
3657 bfd_hash_table_free (&ret->stub_hash_table);
3658 bfd_hash_table_free (&ret->branch_hash_table);
3659 _bfd_generic_link_hash_table_free (hash);
3660 }
3661
3662 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3663
3664 void
3665 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3666 {
3667 struct ppc_link_hash_table *htab;
3668
3669 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3670
3671 /* Always hook our dynamic sections into the first bfd, which is the
3672 linker created stub bfd. This ensures that the GOT header is at
3673 the start of the output TOC section. */
3674 htab = ppc_hash_table (info);
3675 htab->stub_bfd = abfd;
3676 htab->elf.dynobj = abfd;
3677 }
3678
3679 /* Build a name for an entry in the stub hash table. */
3680
3681 static char *
3682 ppc_stub_name (const asection *input_section,
3683 const asection *sym_sec,
3684 const struct ppc_link_hash_entry *h,
3685 const Elf_Internal_Rela *rel)
3686 {
3687 char *stub_name;
3688 bfd_size_type len;
3689
3690 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3691 offsets from a sym as a branch target? In fact, we could
3692 probably assume the addend is always zero. */
3693 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3694
3695 if (h)
3696 {
3697 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3698 stub_name = bfd_malloc (len);
3699 if (stub_name == NULL)
3700 return stub_name;
3701
3702 sprintf (stub_name, "%08x.%s+%x",
3703 input_section->id & 0xffffffff,
3704 h->elf.root.root.string,
3705 (int) rel->r_addend & 0xffffffff);
3706 }
3707 else
3708 {
3709 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3710 stub_name = bfd_malloc (len);
3711 if (stub_name == NULL)
3712 return stub_name;
3713
3714 sprintf (stub_name, "%08x.%x:%x+%x",
3715 input_section->id & 0xffffffff,
3716 sym_sec->id & 0xffffffff,
3717 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3718 (int) rel->r_addend & 0xffffffff);
3719 }
3720 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3721 stub_name[len - 2] = 0;
3722 return stub_name;
3723 }
3724
3725 /* Look up an entry in the stub hash. Stub entries are cached because
3726 creating the stub name takes a bit of time. */
3727
3728 static struct ppc_stub_hash_entry *
3729 ppc_get_stub_entry (const asection *input_section,
3730 const asection *sym_sec,
3731 struct ppc_link_hash_entry *h,
3732 const Elf_Internal_Rela *rel,
3733 struct ppc_link_hash_table *htab)
3734 {
3735 struct ppc_stub_hash_entry *stub_entry;
3736 const asection *id_sec;
3737
3738 /* If this input section is part of a group of sections sharing one
3739 stub section, then use the id of the first section in the group.
3740 Stub names need to include a section id, as there may well be
3741 more than one stub used to reach say, printf, and we need to
3742 distinguish between them. */
3743 id_sec = htab->stub_group[input_section->id].link_sec;
3744
3745 if (h != NULL && h->u.stub_cache != NULL
3746 && h->u.stub_cache->h == h
3747 && h->u.stub_cache->id_sec == id_sec)
3748 {
3749 stub_entry = h->u.stub_cache;
3750 }
3751 else
3752 {
3753 char *stub_name;
3754
3755 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3756 if (stub_name == NULL)
3757 return NULL;
3758
3759 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3760 stub_name, FALSE, FALSE);
3761 if (h != NULL)
3762 h->u.stub_cache = stub_entry;
3763
3764 free (stub_name);
3765 }
3766
3767 return stub_entry;
3768 }
3769
3770 /* Add a new stub entry to the stub hash. Not all fields of the new
3771 stub entry are initialised. */
3772
3773 static struct ppc_stub_hash_entry *
3774 ppc_add_stub (const char *stub_name,
3775 asection *section,
3776 struct ppc_link_hash_table *htab)
3777 {
3778 asection *link_sec;
3779 asection *stub_sec;
3780 struct ppc_stub_hash_entry *stub_entry;
3781
3782 link_sec = htab->stub_group[section->id].link_sec;
3783 stub_sec = htab->stub_group[section->id].stub_sec;
3784 if (stub_sec == NULL)
3785 {
3786 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3787 if (stub_sec == NULL)
3788 {
3789 size_t namelen;
3790 bfd_size_type len;
3791 char *s_name;
3792
3793 namelen = strlen (link_sec->name);
3794 len = namelen + sizeof (STUB_SUFFIX);
3795 s_name = bfd_alloc (htab->stub_bfd, len);
3796 if (s_name == NULL)
3797 return NULL;
3798
3799 memcpy (s_name, link_sec->name, namelen);
3800 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3801 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3802 if (stub_sec == NULL)
3803 return NULL;
3804 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3805 }
3806 htab->stub_group[section->id].stub_sec = stub_sec;
3807 }
3808
3809 /* Enter this entry into the linker stub hash table. */
3810 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3811 TRUE, FALSE);
3812 if (stub_entry == NULL)
3813 {
3814 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3815 section->owner, stub_name);
3816 return NULL;
3817 }
3818
3819 stub_entry->stub_sec = stub_sec;
3820 stub_entry->stub_offset = 0;
3821 stub_entry->id_sec = link_sec;
3822 return stub_entry;
3823 }
3824
3825 /* Create sections for linker generated code. */
3826
3827 static bfd_boolean
3828 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3829 {
3830 struct ppc_link_hash_table *htab;
3831 flagword flags;
3832
3833 htab = ppc_hash_table (info);
3834
3835 /* Create .sfpr for code to save and restore fp regs. */
3836 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
3837 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3838 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
3839 flags);
3840 if (htab->sfpr == NULL
3841 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
3842 return FALSE;
3843
3844 /* Create .glink for lazy dynamic linking support. */
3845 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
3846 flags);
3847 if (htab->glink == NULL
3848 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
3849 return FALSE;
3850
3851 /* Create branch lookup table for plt_branch stubs. */
3852 flags = (SEC_ALLOC | SEC_LOAD
3853 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3854 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
3855 flags);
3856 if (htab->brlt == NULL
3857 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
3858 return FALSE;
3859
3860 if (!info->shared)
3861 return TRUE;
3862
3863 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3864 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3865 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
3866 ".rela.branch_lt",
3867 flags);
3868 if (!htab->relbrlt
3869 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
3870 return FALSE;
3871
3872 return TRUE;
3873 }
3874
3875 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
3876 not already done. */
3877
3878 static bfd_boolean
3879 create_got_section (bfd *abfd, struct bfd_link_info *info)
3880 {
3881 asection *got, *relgot;
3882 flagword flags;
3883 struct ppc_link_hash_table *htab = ppc_hash_table (info);
3884
3885 if (! is_ppc64_elf_target (abfd->xvec))
3886 return FALSE;
3887
3888 if (!htab->got)
3889 {
3890 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
3891 return FALSE;
3892
3893 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
3894 if (!htab->got)
3895 abort ();
3896 }
3897
3898 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3899 | SEC_LINKER_CREATED);
3900
3901 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3902 if (!got
3903 || !bfd_set_section_alignment (abfd, got, 3))
3904 return FALSE;
3905
3906 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
3907 flags | SEC_READONLY);
3908 if (!relgot
3909 || ! bfd_set_section_alignment (abfd, relgot, 3))
3910 return FALSE;
3911
3912 ppc64_elf_tdata (abfd)->got = got;
3913 ppc64_elf_tdata (abfd)->relgot = relgot;
3914 return TRUE;
3915 }
3916
3917 /* Create the dynamic sections, and set up shortcuts. */
3918
3919 static bfd_boolean
3920 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
3921 {
3922 struct ppc_link_hash_table *htab;
3923
3924 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
3925 return FALSE;
3926
3927 htab = ppc_hash_table (info);
3928 if (!htab->got)
3929 htab->got = bfd_get_section_by_name (dynobj, ".got");
3930 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
3931 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
3932 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
3933 if (!info->shared)
3934 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
3935
3936 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
3937 || (!info->shared && !htab->relbss))
3938 abort ();
3939
3940 return TRUE;
3941 }
3942
3943 /* Merge PLT info on FROM with that on TO. */
3944
3945 static void
3946 move_plt_plist (struct ppc_link_hash_entry *from,
3947 struct ppc_link_hash_entry *to)
3948 {
3949 if (from->elf.plt.plist != NULL)
3950 {
3951 if (to->elf.plt.plist != NULL)
3952 {
3953 struct plt_entry **entp;
3954 struct plt_entry *ent;
3955
3956 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
3957 {
3958 struct plt_entry *dent;
3959
3960 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
3961 if (dent->addend == ent->addend)
3962 {
3963 dent->plt.refcount += ent->plt.refcount;
3964 *entp = ent->next;
3965 break;
3966 }
3967 if (dent == NULL)
3968 entp = &ent->next;
3969 }
3970 *entp = to->elf.plt.plist;
3971 }
3972
3973 to->elf.plt.plist = from->elf.plt.plist;
3974 from->elf.plt.plist = NULL;
3975 }
3976 }
3977
3978 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3979
3980 static void
3981 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
3982 struct elf_link_hash_entry *dir,
3983 struct elf_link_hash_entry *ind)
3984 {
3985 struct ppc_link_hash_entry *edir, *eind;
3986
3987 edir = (struct ppc_link_hash_entry *) dir;
3988 eind = (struct ppc_link_hash_entry *) ind;
3989
3990 /* Copy over any dynamic relocs we may have on the indirect sym. */
3991 if (eind->dyn_relocs != NULL)
3992 {
3993 if (edir->dyn_relocs != NULL)
3994 {
3995 struct ppc_dyn_relocs **pp;
3996 struct ppc_dyn_relocs *p;
3997
3998 /* Add reloc counts against the indirect sym to the direct sym
3999 list. Merge any entries against the same section. */
4000 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4001 {
4002 struct ppc_dyn_relocs *q;
4003
4004 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4005 if (q->sec == p->sec)
4006 {
4007 q->pc_count += p->pc_count;
4008 q->count += p->count;
4009 *pp = p->next;
4010 break;
4011 }
4012 if (q == NULL)
4013 pp = &p->next;
4014 }
4015 *pp = edir->dyn_relocs;
4016 }
4017
4018 edir->dyn_relocs = eind->dyn_relocs;
4019 eind->dyn_relocs = NULL;
4020 }
4021
4022 edir->is_func |= eind->is_func;
4023 edir->is_func_descriptor |= eind->is_func_descriptor;
4024 edir->tls_mask |= eind->tls_mask;
4025
4026 /* If called to transfer flags for a weakdef during processing
4027 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4028 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4029 if (!(ELIMINATE_COPY_RELOCS
4030 && eind->elf.root.type != bfd_link_hash_indirect
4031 && edir->elf.dynamic_adjusted))
4032 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4033
4034 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4035 edir->elf.ref_regular |= eind->elf.ref_regular;
4036 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4037 edir->elf.needs_plt |= eind->elf.needs_plt;
4038
4039 /* If we were called to copy over info for a weak sym, that's all. */
4040 if (eind->elf.root.type != bfd_link_hash_indirect)
4041 return;
4042
4043 /* Copy over got entries that we may have already seen to the
4044 symbol which just became indirect. */
4045 if (eind->elf.got.glist != NULL)
4046 {
4047 if (edir->elf.got.glist != NULL)
4048 {
4049 struct got_entry **entp;
4050 struct got_entry *ent;
4051
4052 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4053 {
4054 struct got_entry *dent;
4055
4056 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4057 if (dent->addend == ent->addend
4058 && dent->owner == ent->owner
4059 && dent->tls_type == ent->tls_type)
4060 {
4061 dent->got.refcount += ent->got.refcount;
4062 *entp = ent->next;
4063 break;
4064 }
4065 if (dent == NULL)
4066 entp = &ent->next;
4067 }
4068 *entp = edir->elf.got.glist;
4069 }
4070
4071 edir->elf.got.glist = eind->elf.got.glist;
4072 eind->elf.got.glist = NULL;
4073 }
4074
4075 /* And plt entries. */
4076 move_plt_plist (eind, edir);
4077
4078 if (eind->elf.dynindx != -1)
4079 {
4080 if (edir->elf.dynindx != -1)
4081 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4082 edir->elf.dynstr_index);
4083 edir->elf.dynindx = eind->elf.dynindx;
4084 edir->elf.dynstr_index = eind->elf.dynstr_index;
4085 eind->elf.dynindx = -1;
4086 eind->elf.dynstr_index = 0;
4087 }
4088 }
4089
4090 /* Find the function descriptor hash entry from the given function code
4091 hash entry FH. Link the entries via their OH fields. */
4092
4093 static struct ppc_link_hash_entry *
4094 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4095 {
4096 struct ppc_link_hash_entry *fdh = fh->oh;
4097
4098 if (fdh == NULL)
4099 {
4100 const char *fd_name = fh->elf.root.root.string + 1;
4101
4102 fdh = (struct ppc_link_hash_entry *)
4103 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4104 if (fdh != NULL)
4105 {
4106 fdh->is_func_descriptor = 1;
4107 fdh->oh = fh;
4108 fh->is_func = 1;
4109 fh->oh = fdh;
4110 }
4111 }
4112
4113 return fdh;
4114 }
4115
4116 /* Make a fake function descriptor sym for the code sym FH. */
4117
4118 static struct ppc_link_hash_entry *
4119 make_fdh (struct bfd_link_info *info,
4120 struct ppc_link_hash_entry *fh)
4121 {
4122 bfd *abfd;
4123 asymbol *newsym;
4124 struct bfd_link_hash_entry *bh;
4125 struct ppc_link_hash_entry *fdh;
4126
4127 abfd = fh->elf.root.u.undef.abfd;
4128 newsym = bfd_make_empty_symbol (abfd);
4129 newsym->name = fh->elf.root.root.string + 1;
4130 newsym->section = bfd_und_section_ptr;
4131 newsym->value = 0;
4132 newsym->flags = BSF_WEAK;
4133
4134 bh = NULL;
4135 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4136 newsym->flags, newsym->section,
4137 newsym->value, NULL, FALSE, FALSE,
4138 &bh))
4139 return NULL;
4140
4141 fdh = (struct ppc_link_hash_entry *) bh;
4142 fdh->elf.non_elf = 0;
4143 fdh->fake = 1;
4144 fdh->is_func_descriptor = 1;
4145 fdh->oh = fh;
4146 fh->is_func = 1;
4147 fh->oh = fdh;
4148 return fdh;
4149 }
4150
4151 /* Fix function descriptor symbols defined in .opd sections to be
4152 function type. */
4153
4154 static bfd_boolean
4155 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4156 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4157 Elf_Internal_Sym *isym,
4158 const char **name ATTRIBUTE_UNUSED,
4159 flagword *flags ATTRIBUTE_UNUSED,
4160 asection **sec,
4161 bfd_vma *value ATTRIBUTE_UNUSED)
4162 {
4163 if (*sec != NULL
4164 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4165 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4166
4167 return TRUE;
4168 }
4169
4170 /* This function makes an old ABI object reference to ".bar" cause the
4171 inclusion of a new ABI object archive that defines "bar".
4172 NAME is a symbol defined in an archive. Return a symbol in the hash
4173 table that might be satisfied by the archive symbols. */
4174
4175 static struct elf_link_hash_entry *
4176 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4177 struct bfd_link_info *info,
4178 const char *name)
4179 {
4180 struct elf_link_hash_entry *h;
4181 char *dot_name;
4182 size_t len;
4183
4184 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4185 if (h != NULL
4186 /* Don't return this sym if it is a fake function descriptor
4187 created by add_symbol_adjust. */
4188 && !(h->root.type == bfd_link_hash_undefweak
4189 && ((struct ppc_link_hash_entry *) h)->fake))
4190 return h;
4191
4192 if (name[0] == '.')
4193 return h;
4194
4195 len = strlen (name);
4196 dot_name = bfd_alloc (abfd, len + 2);
4197 if (dot_name == NULL)
4198 return (struct elf_link_hash_entry *) 0 - 1;
4199 dot_name[0] = '.';
4200 memcpy (dot_name + 1, name, len + 1);
4201 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4202 bfd_release (abfd, dot_name);
4203 return h;
4204 }
4205
4206 /* This function satisfies all old ABI object references to ".bar" if a
4207 new ABI object defines "bar". Well, at least, undefined dot symbols
4208 are made weak. This stops later archive searches from including an
4209 object if we already have a function descriptor definition. It also
4210 prevents the linker complaining about undefined symbols.
4211 We also check and correct mismatched symbol visibility here. The
4212 most restrictive visibility of the function descriptor and the
4213 function entry symbol is used. */
4214
4215 static bfd_boolean
4216 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4217 {
4218 struct ppc_link_hash_table *htab;
4219 struct ppc_link_hash_entry *fdh;
4220
4221 if (eh->elf.root.type == bfd_link_hash_indirect)
4222 return TRUE;
4223
4224 if (eh->elf.root.type == bfd_link_hash_warning)
4225 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4226
4227 if (eh->elf.root.root.string[0] != '.')
4228 abort ();
4229
4230 htab = ppc_hash_table (info);
4231 fdh = get_fdh (eh, htab);
4232 if (fdh == NULL
4233 && !info->relocatable
4234 && (eh->elf.root.type == bfd_link_hash_undefined
4235 || eh->elf.root.type == bfd_link_hash_undefweak)
4236 && eh->elf.ref_regular)
4237 {
4238 /* Make an undefweak function descriptor sym, which is enough to
4239 pull in an --as-needed shared lib, but won't cause link
4240 errors. Archives are handled elsewhere. */
4241 fdh = make_fdh (info, eh);
4242 if (fdh == NULL)
4243 return FALSE;
4244 else
4245 fdh->elf.ref_regular = 1;
4246 }
4247 else if (fdh != NULL)
4248 {
4249 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4250 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4251 if (entry_vis < descr_vis)
4252 fdh->elf.other += entry_vis - descr_vis;
4253 else if (entry_vis > descr_vis)
4254 eh->elf.other += descr_vis - entry_vis;
4255
4256 if ((fdh->elf.root.type == bfd_link_hash_defined
4257 || fdh->elf.root.type == bfd_link_hash_defweak)
4258 && eh->elf.root.type == bfd_link_hash_undefined)
4259 {
4260 eh->elf.root.type = bfd_link_hash_undefweak;
4261 eh->was_undefined = 1;
4262 htab->twiddled_syms = 1;
4263 }
4264 }
4265
4266 return TRUE;
4267 }
4268
4269 /* Process list of dot-symbols we made in link_hash_newfunc. */
4270
4271 static bfd_boolean
4272 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4273 {
4274 struct ppc_link_hash_table *htab;
4275 struct ppc_link_hash_entry **p, *eh;
4276
4277 htab = ppc_hash_table (info);
4278 if (!is_ppc64_elf_target (info->output_bfd->xvec))
4279 return TRUE;
4280
4281 if (is_ppc64_elf_target (ibfd->xvec))
4282 {
4283 p = &htab->dot_syms;
4284 while ((eh = *p) != NULL)
4285 {
4286 *p = NULL;
4287 if (!add_symbol_adjust (eh, info))
4288 return FALSE;
4289 p = &eh->u.next_dot_sym;
4290 }
4291 }
4292
4293 /* Clear the list for non-ppc64 input files. */
4294 p = &htab->dot_syms;
4295 while ((eh = *p) != NULL)
4296 {
4297 *p = NULL;
4298 p = &eh->u.next_dot_sym;
4299 }
4300
4301 /* We need to fix the undefs list for any syms we have twiddled to
4302 undef_weak. */
4303 if (htab->twiddled_syms)
4304 {
4305 bfd_link_repair_undef_list (&htab->elf.root);
4306 htab->twiddled_syms = 0;
4307 }
4308 return TRUE;
4309 }
4310
4311 /* Undo hash table changes when an --as-needed input file is determined
4312 not to be needed. */
4313
4314 static bfd_boolean
4315 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4316 struct bfd_link_info *info)
4317 {
4318 ppc_hash_table (info)->dot_syms = NULL;
4319 return TRUE;
4320 }
4321
4322 static bfd_boolean
4323 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4324 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4325 {
4326 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4327 char *local_got_tls_masks;
4328
4329 if (local_got_ents == NULL)
4330 {
4331 bfd_size_type size = symtab_hdr->sh_info;
4332
4333 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4334 local_got_ents = bfd_zalloc (abfd, size);
4335 if (local_got_ents == NULL)
4336 return FALSE;
4337 elf_local_got_ents (abfd) = local_got_ents;
4338 }
4339
4340 if ((tls_type & TLS_EXPLICIT) == 0)
4341 {
4342 struct got_entry *ent;
4343
4344 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4345 if (ent->addend == r_addend
4346 && ent->owner == abfd
4347 && ent->tls_type == tls_type)
4348 break;
4349 if (ent == NULL)
4350 {
4351 bfd_size_type amt = sizeof (*ent);
4352 ent = bfd_alloc (abfd, amt);
4353 if (ent == NULL)
4354 return FALSE;
4355 ent->next = local_got_ents[r_symndx];
4356 ent->addend = r_addend;
4357 ent->owner = abfd;
4358 ent->tls_type = tls_type;
4359 ent->got.refcount = 0;
4360 local_got_ents[r_symndx] = ent;
4361 }
4362 ent->got.refcount += 1;
4363 }
4364
4365 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4366 local_got_tls_masks[r_symndx] |= tls_type;
4367 return TRUE;
4368 }
4369
4370 static bfd_boolean
4371 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4372 {
4373 struct plt_entry *ent;
4374
4375 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4376 if (ent->addend == addend)
4377 break;
4378 if (ent == NULL)
4379 {
4380 bfd_size_type amt = sizeof (*ent);
4381 ent = bfd_alloc (abfd, amt);
4382 if (ent == NULL)
4383 return FALSE;
4384 ent->next = eh->elf.plt.plist;
4385 ent->addend = addend;
4386 ent->plt.refcount = 0;
4387 eh->elf.plt.plist = ent;
4388 }
4389 ent->plt.refcount += 1;
4390 eh->elf.needs_plt = 1;
4391 if (eh->elf.root.root.string[0] == '.'
4392 && eh->elf.root.root.string[1] != '\0')
4393 eh->is_func = 1;
4394 return TRUE;
4395 }
4396
4397 /* Look through the relocs for a section during the first phase, and
4398 calculate needed space in the global offset table, procedure
4399 linkage table, and dynamic reloc sections. */
4400
4401 static bfd_boolean
4402 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4403 asection *sec, const Elf_Internal_Rela *relocs)
4404 {
4405 struct ppc_link_hash_table *htab;
4406 Elf_Internal_Shdr *symtab_hdr;
4407 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4408 const Elf_Internal_Rela *rel;
4409 const Elf_Internal_Rela *rel_end;
4410 asection *sreloc;
4411 asection **opd_sym_map;
4412
4413 if (info->relocatable)
4414 return TRUE;
4415
4416 /* Don't do anything special with non-loaded, non-alloced sections.
4417 In particular, any relocs in such sections should not affect GOT
4418 and PLT reference counting (ie. we don't allow them to create GOT
4419 or PLT entries), there's no possibility or desire to optimize TLS
4420 relocs, and there's not much point in propagating relocs to shared
4421 libs that the dynamic linker won't relocate. */
4422 if ((sec->flags & SEC_ALLOC) == 0)
4423 return TRUE;
4424
4425 BFD_ASSERT (is_ppc64_elf_target (abfd->xvec));
4426
4427 htab = ppc_hash_table (info);
4428 symtab_hdr = &elf_symtab_hdr (abfd);
4429
4430 sym_hashes = elf_sym_hashes (abfd);
4431 sym_hashes_end = (sym_hashes
4432 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4433 - symtab_hdr->sh_info);
4434
4435 sreloc = NULL;
4436 opd_sym_map = NULL;
4437 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4438 {
4439 /* Garbage collection needs some extra help with .opd sections.
4440 We don't want to necessarily keep everything referenced by
4441 relocs in .opd, as that would keep all functions. Instead,
4442 if we reference an .opd symbol (a function descriptor), we
4443 want to keep the function code symbol's section. This is
4444 easy for global symbols, but for local syms we need to keep
4445 information about the associated function section. */
4446 bfd_size_type amt;
4447
4448 amt = sec->size * sizeof (*opd_sym_map) / 8;
4449 opd_sym_map = bfd_zalloc (abfd, amt);
4450 if (opd_sym_map == NULL)
4451 return FALSE;
4452 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4453 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4454 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4455 }
4456
4457 if (htab->sfpr == NULL
4458 && !create_linkage_sections (htab->elf.dynobj, info))
4459 return FALSE;
4460
4461 rel_end = relocs + sec->reloc_count;
4462 for (rel = relocs; rel < rel_end; rel++)
4463 {
4464 unsigned long r_symndx;
4465 struct elf_link_hash_entry *h;
4466 enum elf_ppc64_reloc_type r_type;
4467 int tls_type = 0;
4468 struct _ppc64_elf_section_data *ppc64_sec;
4469
4470 r_symndx = ELF64_R_SYM (rel->r_info);
4471 if (r_symndx < symtab_hdr->sh_info)
4472 h = NULL;
4473 else
4474 {
4475 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4476 while (h->root.type == bfd_link_hash_indirect
4477 || h->root.type == bfd_link_hash_warning)
4478 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4479 }
4480
4481 r_type = ELF64_R_TYPE (rel->r_info);
4482 switch (r_type)
4483 {
4484 case R_PPC64_GOT_TLSLD16:
4485 case R_PPC64_GOT_TLSLD16_LO:
4486 case R_PPC64_GOT_TLSLD16_HI:
4487 case R_PPC64_GOT_TLSLD16_HA:
4488 tls_type = TLS_TLS | TLS_LD;
4489 goto dogottls;
4490
4491 case R_PPC64_GOT_TLSGD16:
4492 case R_PPC64_GOT_TLSGD16_LO:
4493 case R_PPC64_GOT_TLSGD16_HI:
4494 case R_PPC64_GOT_TLSGD16_HA:
4495 tls_type = TLS_TLS | TLS_GD;
4496 goto dogottls;
4497
4498 case R_PPC64_GOT_TPREL16_DS:
4499 case R_PPC64_GOT_TPREL16_LO_DS:
4500 case R_PPC64_GOT_TPREL16_HI:
4501 case R_PPC64_GOT_TPREL16_HA:
4502 if (info->shared)
4503 info->flags |= DF_STATIC_TLS;
4504 tls_type = TLS_TLS | TLS_TPREL;
4505 goto dogottls;
4506
4507 case R_PPC64_GOT_DTPREL16_DS:
4508 case R_PPC64_GOT_DTPREL16_LO_DS:
4509 case R_PPC64_GOT_DTPREL16_HI:
4510 case R_PPC64_GOT_DTPREL16_HA:
4511 tls_type = TLS_TLS | TLS_DTPREL;
4512 dogottls:
4513 sec->has_tls_reloc = 1;
4514 /* Fall thru */
4515
4516 case R_PPC64_GOT16:
4517 case R_PPC64_GOT16_DS:
4518 case R_PPC64_GOT16_HA:
4519 case R_PPC64_GOT16_HI:
4520 case R_PPC64_GOT16_LO:
4521 case R_PPC64_GOT16_LO_DS:
4522 /* This symbol requires a global offset table entry. */
4523 sec->has_toc_reloc = 1;
4524 if (ppc64_elf_tdata (abfd)->got == NULL
4525 && !create_got_section (abfd, info))
4526 return FALSE;
4527
4528 if (h != NULL)
4529 {
4530 struct ppc_link_hash_entry *eh;
4531 struct got_entry *ent;
4532
4533 eh = (struct ppc_link_hash_entry *) h;
4534 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4535 if (ent->addend == rel->r_addend
4536 && ent->owner == abfd
4537 && ent->tls_type == tls_type)
4538 break;
4539 if (ent == NULL)
4540 {
4541 bfd_size_type amt = sizeof (*ent);
4542 ent = bfd_alloc (abfd, amt);
4543 if (ent == NULL)
4544 return FALSE;
4545 ent->next = eh->elf.got.glist;
4546 ent->addend = rel->r_addend;
4547 ent->owner = abfd;
4548 ent->tls_type = tls_type;
4549 ent->got.refcount = 0;
4550 eh->elf.got.glist = ent;
4551 }
4552 ent->got.refcount += 1;
4553 eh->tls_mask |= tls_type;
4554 }
4555 else
4556 /* This is a global offset table entry for a local symbol. */
4557 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4558 rel->r_addend, tls_type))
4559 return FALSE;
4560 break;
4561
4562 case R_PPC64_PLT16_HA:
4563 case R_PPC64_PLT16_HI:
4564 case R_PPC64_PLT16_LO:
4565 case R_PPC64_PLT32:
4566 case R_PPC64_PLT64:
4567 /* This symbol requires a procedure linkage table entry. We
4568 actually build the entry in adjust_dynamic_symbol,
4569 because this might be a case of linking PIC code without
4570 linking in any dynamic objects, in which case we don't
4571 need to generate a procedure linkage table after all. */
4572 if (h == NULL)
4573 {
4574 /* It does not make sense to have a procedure linkage
4575 table entry for a local symbol. */
4576 bfd_set_error (bfd_error_bad_value);
4577 return FALSE;
4578 }
4579 else
4580 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4581 rel->r_addend))
4582 return FALSE;
4583 break;
4584
4585 /* The following relocations don't need to propagate the
4586 relocation if linking a shared object since they are
4587 section relative. */
4588 case R_PPC64_SECTOFF:
4589 case R_PPC64_SECTOFF_LO:
4590 case R_PPC64_SECTOFF_HI:
4591 case R_PPC64_SECTOFF_HA:
4592 case R_PPC64_SECTOFF_DS:
4593 case R_PPC64_SECTOFF_LO_DS:
4594 case R_PPC64_DTPREL16:
4595 case R_PPC64_DTPREL16_LO:
4596 case R_PPC64_DTPREL16_HI:
4597 case R_PPC64_DTPREL16_HA:
4598 case R_PPC64_DTPREL16_DS:
4599 case R_PPC64_DTPREL16_LO_DS:
4600 case R_PPC64_DTPREL16_HIGHER:
4601 case R_PPC64_DTPREL16_HIGHERA:
4602 case R_PPC64_DTPREL16_HIGHEST:
4603 case R_PPC64_DTPREL16_HIGHESTA:
4604 break;
4605
4606 /* Nor do these. */
4607 case R_PPC64_TOC16:
4608 case R_PPC64_TOC16_LO:
4609 case R_PPC64_TOC16_HI:
4610 case R_PPC64_TOC16_HA:
4611 case R_PPC64_TOC16_DS:
4612 case R_PPC64_TOC16_LO_DS:
4613 sec->has_toc_reloc = 1;
4614 break;
4615
4616 /* This relocation describes the C++ object vtable hierarchy.
4617 Reconstruct it for later use during GC. */
4618 case R_PPC64_GNU_VTINHERIT:
4619 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4620 return FALSE;
4621 break;
4622
4623 /* This relocation describes which C++ vtable entries are actually
4624 used. Record for later use during GC. */
4625 case R_PPC64_GNU_VTENTRY:
4626 BFD_ASSERT (h != NULL);
4627 if (h != NULL
4628 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4629 return FALSE;
4630 break;
4631
4632 case R_PPC64_REL14:
4633 case R_PPC64_REL14_BRTAKEN:
4634 case R_PPC64_REL14_BRNTAKEN:
4635 {
4636 asection *dest = NULL;
4637
4638 /* Heuristic: If jumping outside our section, chances are
4639 we are going to need a stub. */
4640 if (h != NULL)
4641 {
4642 /* If the sym is weak it may be overridden later, so
4643 don't assume we know where a weak sym lives. */
4644 if (h->root.type == bfd_link_hash_defined)
4645 dest = h->root.u.def.section;
4646 }
4647 else
4648 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4649 sec, r_symndx);
4650 if (dest != sec)
4651 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4652 }
4653 /* Fall through. */
4654
4655 case R_PPC64_REL24:
4656 if (h != NULL)
4657 {
4658 /* We may need a .plt entry if the function this reloc
4659 refers to is in a shared lib. */
4660 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4661 rel->r_addend))
4662 return FALSE;
4663 if (h == &htab->tls_get_addr->elf
4664 || h == &htab->tls_get_addr_fd->elf)
4665 sec->has_tls_reloc = 1;
4666 else if (htab->tls_get_addr == NULL
4667 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4668 && (h->root.root.string[15] == 0
4669 || h->root.root.string[15] == '@'))
4670 {
4671 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4672 sec->has_tls_reloc = 1;
4673 }
4674 else if (htab->tls_get_addr_fd == NULL
4675 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4676 && (h->root.root.string[14] == 0
4677 || h->root.root.string[14] == '@'))
4678 {
4679 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4680 sec->has_tls_reloc = 1;
4681 }
4682 }
4683 break;
4684
4685 case R_PPC64_TPREL64:
4686 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4687 if (info->shared)
4688 info->flags |= DF_STATIC_TLS;
4689 goto dotlstoc;
4690
4691 case R_PPC64_DTPMOD64:
4692 if (rel + 1 < rel_end
4693 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4694 && rel[1].r_offset == rel->r_offset + 8)
4695 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4696 else
4697 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4698 goto dotlstoc;
4699
4700 case R_PPC64_DTPREL64:
4701 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4702 if (rel != relocs
4703 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4704 && rel[-1].r_offset == rel->r_offset - 8)
4705 /* This is the second reloc of a dtpmod, dtprel pair.
4706 Don't mark with TLS_DTPREL. */
4707 goto dodyn;
4708
4709 dotlstoc:
4710 sec->has_tls_reloc = 1;
4711 if (h != NULL)
4712 {
4713 struct ppc_link_hash_entry *eh;
4714 eh = (struct ppc_link_hash_entry *) h;
4715 eh->tls_mask |= tls_type;
4716 }
4717 else
4718 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4719 rel->r_addend, tls_type))
4720 return FALSE;
4721
4722 ppc64_sec = ppc64_elf_section_data (sec);
4723 if (ppc64_sec->sec_type != sec_toc)
4724 {
4725 /* One extra to simplify get_tls_mask. */
4726 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4727 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4728 if (ppc64_sec->u.t_symndx == NULL)
4729 return FALSE;
4730 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4731 ppc64_sec->sec_type = sec_toc;
4732 }
4733 BFD_ASSERT (rel->r_offset % 8 == 0);
4734 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4735
4736 /* Mark the second slot of a GD or LD entry.
4737 -1 to indicate GD and -2 to indicate LD. */
4738 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4739 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4740 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4741 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4742 goto dodyn;
4743
4744 case R_PPC64_TPREL16:
4745 case R_PPC64_TPREL16_LO:
4746 case R_PPC64_TPREL16_HI:
4747 case R_PPC64_TPREL16_HA:
4748 case R_PPC64_TPREL16_DS:
4749 case R_PPC64_TPREL16_LO_DS:
4750 case R_PPC64_TPREL16_HIGHER:
4751 case R_PPC64_TPREL16_HIGHERA:
4752 case R_PPC64_TPREL16_HIGHEST:
4753 case R_PPC64_TPREL16_HIGHESTA:
4754 if (info->shared)
4755 {
4756 info->flags |= DF_STATIC_TLS;
4757 goto dodyn;
4758 }
4759 break;
4760
4761 case R_PPC64_ADDR64:
4762 if (opd_sym_map != NULL
4763 && rel + 1 < rel_end
4764 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4765 {
4766 if (h != NULL)
4767 {
4768 if (h->root.root.string[0] == '.'
4769 && h->root.root.string[1] != 0
4770 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4771 ;
4772 else
4773 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4774 }
4775 else
4776 {
4777 asection *s;
4778
4779 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4780 r_symndx);
4781 if (s == NULL)
4782 return FALSE;
4783 else if (s != sec)
4784 opd_sym_map[rel->r_offset / 8] = s;
4785 }
4786 }
4787 /* Fall through. */
4788
4789 case R_PPC64_REL30:
4790 case R_PPC64_REL32:
4791 case R_PPC64_REL64:
4792 case R_PPC64_ADDR14:
4793 case R_PPC64_ADDR14_BRNTAKEN:
4794 case R_PPC64_ADDR14_BRTAKEN:
4795 case R_PPC64_ADDR16:
4796 case R_PPC64_ADDR16_DS:
4797 case R_PPC64_ADDR16_HA:
4798 case R_PPC64_ADDR16_HI:
4799 case R_PPC64_ADDR16_HIGHER:
4800 case R_PPC64_ADDR16_HIGHERA:
4801 case R_PPC64_ADDR16_HIGHEST:
4802 case R_PPC64_ADDR16_HIGHESTA:
4803 case R_PPC64_ADDR16_LO:
4804 case R_PPC64_ADDR16_LO_DS:
4805 case R_PPC64_ADDR24:
4806 case R_PPC64_ADDR32:
4807 case R_PPC64_UADDR16:
4808 case R_PPC64_UADDR32:
4809 case R_PPC64_UADDR64:
4810 case R_PPC64_TOC:
4811 if (h != NULL && !info->shared)
4812 /* We may need a copy reloc. */
4813 h->non_got_ref = 1;
4814
4815 /* Don't propagate .opd relocs. */
4816 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4817 break;
4818
4819 /* If we are creating a shared library, and this is a reloc
4820 against a global symbol, or a non PC relative reloc
4821 against a local symbol, then we need to copy the reloc
4822 into the shared library. However, if we are linking with
4823 -Bsymbolic, we do not need to copy a reloc against a
4824 global symbol which is defined in an object we are
4825 including in the link (i.e., DEF_REGULAR is set). At
4826 this point we have not seen all the input files, so it is
4827 possible that DEF_REGULAR is not set now but will be set
4828 later (it is never cleared). In case of a weak definition,
4829 DEF_REGULAR may be cleared later by a strong definition in
4830 a shared library. We account for that possibility below by
4831 storing information in the dyn_relocs field of the hash
4832 table entry. A similar situation occurs when creating
4833 shared libraries and symbol visibility changes render the
4834 symbol local.
4835
4836 If on the other hand, we are creating an executable, we
4837 may need to keep relocations for symbols satisfied by a
4838 dynamic library if we manage to avoid copy relocs for the
4839 symbol. */
4840 dodyn:
4841 if ((info->shared
4842 && (MUST_BE_DYN_RELOC (r_type)
4843 || (h != NULL
4844 && (! info->symbolic
4845 || h->root.type == bfd_link_hash_defweak
4846 || !h->def_regular))))
4847 || (ELIMINATE_COPY_RELOCS
4848 && !info->shared
4849 && h != NULL
4850 && (h->root.type == bfd_link_hash_defweak
4851 || !h->def_regular)))
4852 {
4853 struct ppc_dyn_relocs *p;
4854 struct ppc_dyn_relocs **head;
4855
4856 /* We must copy these reloc types into the output file.
4857 Create a reloc section in dynobj and make room for
4858 this reloc. */
4859 if (sreloc == NULL)
4860 {
4861 const char *name;
4862 bfd *dynobj;
4863
4864 name = (bfd_elf_string_from_elf_section
4865 (abfd,
4866 elf_elfheader (abfd)->e_shstrndx,
4867 elf_section_data (sec)->rel_hdr.sh_name));
4868 if (name == NULL)
4869 return FALSE;
4870
4871 if (! CONST_STRNEQ (name, ".rela")
4872 || strcmp (bfd_get_section_name (abfd, sec),
4873 name + 5) != 0)
4874 {
4875 (*_bfd_error_handler)
4876 (_("%B: bad relocation section name `%s\'"),
4877 abfd, name);
4878 bfd_set_error (bfd_error_bad_value);
4879 }
4880
4881 dynobj = htab->elf.dynobj;
4882 sreloc = bfd_get_section_by_name (dynobj, name);
4883 if (sreloc == NULL)
4884 {
4885 flagword flags;
4886
4887 flags = (SEC_HAS_CONTENTS | SEC_READONLY
4888 | SEC_IN_MEMORY | SEC_LINKER_CREATED
4889 | SEC_ALLOC | SEC_LOAD);
4890 sreloc = bfd_make_section_with_flags (dynobj,
4891 name,
4892 flags);
4893 if (sreloc == NULL
4894 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
4895 return FALSE;
4896 }
4897 elf_section_data (sec)->sreloc = sreloc;
4898 }
4899
4900 /* If this is a global symbol, we count the number of
4901 relocations we need for this symbol. */
4902 if (h != NULL)
4903 {
4904 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
4905 }
4906 else
4907 {
4908 /* Track dynamic relocs needed for local syms too.
4909 We really need local syms available to do this
4910 easily. Oh well. */
4911
4912 asection *s;
4913 void *vpp;
4914
4915 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4916 sec, r_symndx);
4917 if (s == NULL)
4918 return FALSE;
4919
4920 vpp = &elf_section_data (s)->local_dynrel;
4921 head = (struct ppc_dyn_relocs **) vpp;
4922 }
4923
4924 p = *head;
4925 if (p == NULL || p->sec != sec)
4926 {
4927 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4928 if (p == NULL)
4929 return FALSE;
4930 p->next = *head;
4931 *head = p;
4932 p->sec = sec;
4933 p->count = 0;
4934 p->pc_count = 0;
4935 }
4936
4937 p->count += 1;
4938 if (!MUST_BE_DYN_RELOC (r_type))
4939 p->pc_count += 1;
4940 }
4941 break;
4942
4943 default:
4944 break;
4945 }
4946 }
4947
4948 return TRUE;
4949 }
4950
4951 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
4952 of the code entry point, and its section. */
4953
4954 static bfd_vma
4955 opd_entry_value (asection *opd_sec,
4956 bfd_vma offset,
4957 asection **code_sec,
4958 bfd_vma *code_off)
4959 {
4960 bfd *opd_bfd = opd_sec->owner;
4961 Elf_Internal_Rela *relocs;
4962 Elf_Internal_Rela *lo, *hi, *look;
4963 bfd_vma val;
4964
4965 /* No relocs implies we are linking a --just-symbols object. */
4966 if (opd_sec->reloc_count == 0)
4967 {
4968 bfd_vma val;
4969
4970 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
4971 return (bfd_vma) -1;
4972
4973 if (code_sec != NULL)
4974 {
4975 asection *sec, *likely = NULL;
4976 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
4977 if (sec->vma <= val
4978 && (sec->flags & SEC_LOAD) != 0
4979 && (sec->flags & SEC_ALLOC) != 0)
4980 likely = sec;
4981 if (likely != NULL)
4982 {
4983 *code_sec = likely;
4984 if (code_off != NULL)
4985 *code_off = val - likely->vma;
4986 }
4987 }
4988 return val;
4989 }
4990
4991 BFD_ASSERT (is_ppc64_elf_target (opd_bfd->xvec));
4992
4993 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
4994 if (relocs == NULL)
4995 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
4996
4997 /* Go find the opd reloc at the sym address. */
4998 lo = relocs;
4999 BFD_ASSERT (lo != NULL);
5000 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5001 val = (bfd_vma) -1;
5002 while (lo < hi)
5003 {
5004 look = lo + (hi - lo) / 2;
5005 if (look->r_offset < offset)
5006 lo = look + 1;
5007 else if (look->r_offset > offset)
5008 hi = look;
5009 else
5010 {
5011 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5012
5013 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5014 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5015 {
5016 unsigned long symndx = ELF64_R_SYM (look->r_info);
5017 asection *sec;
5018
5019 if (symndx < symtab_hdr->sh_info)
5020 {
5021 Elf_Internal_Sym *sym;
5022
5023 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5024 if (sym == NULL)
5025 {
5026 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5027 symtab_hdr->sh_info,
5028 0, NULL, NULL, NULL);
5029 if (sym == NULL)
5030 break;
5031 symtab_hdr->contents = (bfd_byte *) sym;
5032 }
5033
5034 sym += symndx;
5035 val = sym->st_value;
5036 sec = NULL;
5037 if ((sym->st_shndx != SHN_UNDEF
5038 && sym->st_shndx < SHN_LORESERVE)
5039 || sym->st_shndx > SHN_HIRESERVE)
5040 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5041 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5042 }
5043 else
5044 {
5045 struct elf_link_hash_entry **sym_hashes;
5046 struct elf_link_hash_entry *rh;
5047
5048 sym_hashes = elf_sym_hashes (opd_bfd);
5049 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5050 while (rh->root.type == bfd_link_hash_indirect
5051 || rh->root.type == bfd_link_hash_warning)
5052 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5053 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5054 || rh->root.type == bfd_link_hash_defweak);
5055 val = rh->root.u.def.value;
5056 sec = rh->root.u.def.section;
5057 }
5058 val += look->r_addend;
5059 if (code_off != NULL)
5060 *code_off = val;
5061 if (code_sec != NULL)
5062 *code_sec = sec;
5063 if (sec != NULL && sec->output_section != NULL)
5064 val += sec->output_section->vma + sec->output_offset;
5065 }
5066 break;
5067 }
5068 }
5069
5070 return val;
5071 }
5072
5073 /* Mark all our entry sym sections, both opd and code section. */
5074
5075 static void
5076 ppc64_elf_gc_keep (struct bfd_link_info *info)
5077 {
5078 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5079 struct bfd_sym_chain *sym;
5080
5081 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5082 {
5083 struct ppc_link_hash_entry *eh;
5084 asection *sec;
5085
5086 eh = (struct ppc_link_hash_entry *)
5087 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5088 if (eh == NULL)
5089 continue;
5090 if (eh->elf.root.type != bfd_link_hash_defined
5091 && eh->elf.root.type != bfd_link_hash_defweak)
5092 continue;
5093
5094 if (eh->is_func_descriptor
5095 && (eh->oh->elf.root.type == bfd_link_hash_defined
5096 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5097 {
5098 sec = eh->oh->elf.root.u.def.section;
5099 sec->flags |= SEC_KEEP;
5100 }
5101 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5102 && opd_entry_value (eh->elf.root.u.def.section,
5103 eh->elf.root.u.def.value,
5104 &sec, NULL) != (bfd_vma) -1)
5105 sec->flags |= SEC_KEEP;
5106
5107 sec = eh->elf.root.u.def.section;
5108 sec->flags |= SEC_KEEP;
5109 }
5110 }
5111
5112 /* Mark sections containing dynamically referenced symbols. When
5113 building shared libraries, we must assume that any visible symbol is
5114 referenced. */
5115
5116 static bfd_boolean
5117 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5118 {
5119 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5120 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5121
5122 if (eh->elf.root.type == bfd_link_hash_warning)
5123 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5124
5125 /* Dynamic linking info is on the func descriptor sym. */
5126 if (eh->oh != NULL
5127 && eh->oh->is_func_descriptor
5128 && (eh->oh->elf.root.type == bfd_link_hash_defined
5129 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5130 eh = eh->oh;
5131
5132 if ((eh->elf.root.type == bfd_link_hash_defined
5133 || eh->elf.root.type == bfd_link_hash_defweak)
5134 && (eh->elf.ref_dynamic
5135 || (!info->executable
5136 && eh->elf.def_regular
5137 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5138 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5139 {
5140 asection *code_sec;
5141
5142 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5143
5144 /* Function descriptor syms cause the associated
5145 function code sym section to be marked. */
5146 if (eh->is_func_descriptor
5147 && (eh->oh->elf.root.type == bfd_link_hash_defined
5148 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5149 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5150 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5151 && opd_entry_value (eh->elf.root.u.def.section,
5152 eh->elf.root.u.def.value,
5153 &code_sec, NULL) != (bfd_vma) -1)
5154 code_sec->flags |= SEC_KEEP;
5155 }
5156
5157 return TRUE;
5158 }
5159
5160 /* Return the section that should be marked against GC for a given
5161 relocation. */
5162
5163 static asection *
5164 ppc64_elf_gc_mark_hook (asection *sec,
5165 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5166 Elf_Internal_Rela *rel,
5167 struct elf_link_hash_entry *h,
5168 Elf_Internal_Sym *sym)
5169 {
5170 asection *rsec;
5171
5172 /* Syms return NULL if we're marking .opd, so we avoid marking all
5173 function sections, as all functions are referenced in .opd. */
5174 rsec = NULL;
5175 if (get_opd_info (sec) != NULL)
5176 return rsec;
5177
5178 if (h != NULL)
5179 {
5180 enum elf_ppc64_reloc_type r_type;
5181 struct ppc_link_hash_entry *eh;
5182
5183 r_type = ELF64_R_TYPE (rel->r_info);
5184 switch (r_type)
5185 {
5186 case R_PPC64_GNU_VTINHERIT:
5187 case R_PPC64_GNU_VTENTRY:
5188 break;
5189
5190 default:
5191 switch (h->root.type)
5192 {
5193 case bfd_link_hash_defined:
5194 case bfd_link_hash_defweak:
5195 eh = (struct ppc_link_hash_entry *) h;
5196 if (eh->oh != NULL
5197 && eh->oh->is_func_descriptor
5198 && (eh->oh->elf.root.type == bfd_link_hash_defined
5199 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5200 eh = eh->oh;
5201
5202 /* Function descriptor syms cause the associated
5203 function code sym section to be marked. */
5204 if (eh->is_func_descriptor
5205 && (eh->oh->elf.root.type == bfd_link_hash_defined
5206 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5207 {
5208 /* They also mark their opd section. */
5209 eh->elf.root.u.def.section->gc_mark = 1;
5210
5211 rsec = eh->oh->elf.root.u.def.section;
5212 }
5213 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5214 && opd_entry_value (eh->elf.root.u.def.section,
5215 eh->elf.root.u.def.value,
5216 &rsec, NULL) != (bfd_vma) -1)
5217 eh->elf.root.u.def.section->gc_mark = 1;
5218 else
5219 rsec = h->root.u.def.section;
5220 break;
5221
5222 case bfd_link_hash_common:
5223 rsec = h->root.u.c.p->section;
5224 break;
5225
5226 default:
5227 break;
5228 }
5229 }
5230 }
5231 else
5232 {
5233 struct _opd_sec_data *opd;
5234
5235 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5236 opd = get_opd_info (rsec);
5237 if (opd != NULL && opd->func_sec != NULL)
5238 {
5239 rsec->gc_mark = 1;
5240
5241 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5242 }
5243 }
5244
5245 return rsec;
5246 }
5247
5248 /* Update the .got, .plt. and dynamic reloc reference counts for the
5249 section being removed. */
5250
5251 static bfd_boolean
5252 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5253 asection *sec, const Elf_Internal_Rela *relocs)
5254 {
5255 struct ppc_link_hash_table *htab;
5256 Elf_Internal_Shdr *symtab_hdr;
5257 struct elf_link_hash_entry **sym_hashes;
5258 struct got_entry **local_got_ents;
5259 const Elf_Internal_Rela *rel, *relend;
5260
5261 if (info->relocatable)
5262 return TRUE;
5263
5264 if ((sec->flags & SEC_ALLOC) == 0)
5265 return TRUE;
5266
5267 elf_section_data (sec)->local_dynrel = NULL;
5268
5269 htab = ppc_hash_table (info);
5270 symtab_hdr = &elf_symtab_hdr (abfd);
5271 sym_hashes = elf_sym_hashes (abfd);
5272 local_got_ents = elf_local_got_ents (abfd);
5273
5274 relend = relocs + sec->reloc_count;
5275 for (rel = relocs; rel < relend; rel++)
5276 {
5277 unsigned long r_symndx;
5278 enum elf_ppc64_reloc_type r_type;
5279 struct elf_link_hash_entry *h = NULL;
5280 char tls_type = 0;
5281
5282 r_symndx = ELF64_R_SYM (rel->r_info);
5283 r_type = ELF64_R_TYPE (rel->r_info);
5284 if (r_symndx >= symtab_hdr->sh_info)
5285 {
5286 struct ppc_link_hash_entry *eh;
5287 struct ppc_dyn_relocs **pp;
5288 struct ppc_dyn_relocs *p;
5289
5290 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5291 while (h->root.type == bfd_link_hash_indirect
5292 || h->root.type == bfd_link_hash_warning)
5293 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5294 eh = (struct ppc_link_hash_entry *) h;
5295
5296 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5297 if (p->sec == sec)
5298 {
5299 /* Everything must go for SEC. */
5300 *pp = p->next;
5301 break;
5302 }
5303 }
5304
5305 switch (r_type)
5306 {
5307 case R_PPC64_GOT_TLSLD16:
5308 case R_PPC64_GOT_TLSLD16_LO:
5309 case R_PPC64_GOT_TLSLD16_HI:
5310 case R_PPC64_GOT_TLSLD16_HA:
5311 tls_type = TLS_TLS | TLS_LD;
5312 goto dogot;
5313
5314 case R_PPC64_GOT_TLSGD16:
5315 case R_PPC64_GOT_TLSGD16_LO:
5316 case R_PPC64_GOT_TLSGD16_HI:
5317 case R_PPC64_GOT_TLSGD16_HA:
5318 tls_type = TLS_TLS | TLS_GD;
5319 goto dogot;
5320
5321 case R_PPC64_GOT_TPREL16_DS:
5322 case R_PPC64_GOT_TPREL16_LO_DS:
5323 case R_PPC64_GOT_TPREL16_HI:
5324 case R_PPC64_GOT_TPREL16_HA:
5325 tls_type = TLS_TLS | TLS_TPREL;
5326 goto dogot;
5327
5328 case R_PPC64_GOT_DTPREL16_DS:
5329 case R_PPC64_GOT_DTPREL16_LO_DS:
5330 case R_PPC64_GOT_DTPREL16_HI:
5331 case R_PPC64_GOT_DTPREL16_HA:
5332 tls_type = TLS_TLS | TLS_DTPREL;
5333 goto dogot;
5334
5335 case R_PPC64_GOT16:
5336 case R_PPC64_GOT16_DS:
5337 case R_PPC64_GOT16_HA:
5338 case R_PPC64_GOT16_HI:
5339 case R_PPC64_GOT16_LO:
5340 case R_PPC64_GOT16_LO_DS:
5341 dogot:
5342 {
5343 struct got_entry *ent;
5344
5345 if (h != NULL)
5346 ent = h->got.glist;
5347 else
5348 ent = local_got_ents[r_symndx];
5349
5350 for (; ent != NULL; ent = ent->next)
5351 if (ent->addend == rel->r_addend
5352 && ent->owner == abfd
5353 && ent->tls_type == tls_type)
5354 break;
5355 if (ent == NULL)
5356 abort ();
5357 if (ent->got.refcount > 0)
5358 ent->got.refcount -= 1;
5359 }
5360 break;
5361
5362 case R_PPC64_PLT16_HA:
5363 case R_PPC64_PLT16_HI:
5364 case R_PPC64_PLT16_LO:
5365 case R_PPC64_PLT32:
5366 case R_PPC64_PLT64:
5367 case R_PPC64_REL14:
5368 case R_PPC64_REL14_BRNTAKEN:
5369 case R_PPC64_REL14_BRTAKEN:
5370 case R_PPC64_REL24:
5371 if (h != NULL)
5372 {
5373 struct plt_entry *ent;
5374
5375 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5376 if (ent->addend == rel->r_addend)
5377 break;
5378 if (ent == NULL)
5379 abort ();
5380 if (ent->plt.refcount > 0)
5381 ent->plt.refcount -= 1;
5382 }
5383 break;
5384
5385 default:
5386 break;
5387 }
5388 }
5389 return TRUE;
5390 }
5391
5392 /* The maximum size of .sfpr. */
5393 #define SFPR_MAX (218*4)
5394
5395 struct sfpr_def_parms
5396 {
5397 const char name[12];
5398 unsigned char lo, hi;
5399 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5400 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5401 };
5402
5403 /* Auto-generate _save*, _rest* functions in .sfpr. */
5404
5405 static unsigned int
5406 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5407 {
5408 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5409 unsigned int i;
5410 size_t len = strlen (parm->name);
5411 bfd_boolean writing = FALSE;
5412 char sym[16];
5413
5414 memcpy (sym, parm->name, len);
5415 sym[len + 2] = 0;
5416
5417 for (i = parm->lo; i <= parm->hi; i++)
5418 {
5419 struct elf_link_hash_entry *h;
5420
5421 sym[len + 0] = i / 10 + '0';
5422 sym[len + 1] = i % 10 + '0';
5423 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5424 if (h != NULL
5425 && !h->def_regular)
5426 {
5427 h->root.type = bfd_link_hash_defined;
5428 h->root.u.def.section = htab->sfpr;
5429 h->root.u.def.value = htab->sfpr->size;
5430 h->type = STT_FUNC;
5431 h->def_regular = 1;
5432 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5433 writing = TRUE;
5434 if (htab->sfpr->contents == NULL)
5435 {
5436 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5437 if (htab->sfpr->contents == NULL)
5438 return FALSE;
5439 }
5440 }
5441 if (writing)
5442 {
5443 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5444 if (i != parm->hi)
5445 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5446 else
5447 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5448 htab->sfpr->size = p - htab->sfpr->contents;
5449 }
5450 }
5451
5452 return TRUE;
5453 }
5454
5455 static bfd_byte *
5456 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5457 {
5458 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5459 return p + 4;
5460 }
5461
5462 static bfd_byte *
5463 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5464 {
5465 p = savegpr0 (abfd, p, r);
5466 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5467 p = p + 4;
5468 bfd_put_32 (abfd, BLR, p);
5469 return p + 4;
5470 }
5471
5472 static bfd_byte *
5473 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5474 {
5475 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5476 return p + 4;
5477 }
5478
5479 static bfd_byte *
5480 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5481 {
5482 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5483 p = p + 4;
5484 p = restgpr0 (abfd, p, r);
5485 bfd_put_32 (abfd, MTLR_R0, p);
5486 p = p + 4;
5487 if (r == 29)
5488 {
5489 p = restgpr0 (abfd, p, 30);
5490 p = restgpr0 (abfd, p, 31);
5491 }
5492 bfd_put_32 (abfd, BLR, p);
5493 return p + 4;
5494 }
5495
5496 static bfd_byte *
5497 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5498 {
5499 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5500 return p + 4;
5501 }
5502
5503 static bfd_byte *
5504 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5505 {
5506 p = savegpr1 (abfd, p, r);
5507 bfd_put_32 (abfd, BLR, p);
5508 return p + 4;
5509 }
5510
5511 static bfd_byte *
5512 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5513 {
5514 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5515 return p + 4;
5516 }
5517
5518 static bfd_byte *
5519 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5520 {
5521 p = restgpr1 (abfd, p, r);
5522 bfd_put_32 (abfd, BLR, p);
5523 return p + 4;
5524 }
5525
5526 static bfd_byte *
5527 savefpr (bfd *abfd, bfd_byte *p, int r)
5528 {
5529 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5530 return p + 4;
5531 }
5532
5533 static bfd_byte *
5534 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5535 {
5536 p = savefpr (abfd, p, r);
5537 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5538 p = p + 4;
5539 bfd_put_32 (abfd, BLR, p);
5540 return p + 4;
5541 }
5542
5543 static bfd_byte *
5544 restfpr (bfd *abfd, bfd_byte *p, int r)
5545 {
5546 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5547 return p + 4;
5548 }
5549
5550 static bfd_byte *
5551 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5552 {
5553 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5554 p = p + 4;
5555 p = restfpr (abfd, p, r);
5556 bfd_put_32 (abfd, MTLR_R0, p);
5557 p = p + 4;
5558 if (r == 29)
5559 {
5560 p = restfpr (abfd, p, 30);
5561 p = restfpr (abfd, p, 31);
5562 }
5563 bfd_put_32 (abfd, BLR, p);
5564 return p + 4;
5565 }
5566
5567 static bfd_byte *
5568 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5569 {
5570 p = savefpr (abfd, p, r);
5571 bfd_put_32 (abfd, BLR, p);
5572 return p + 4;
5573 }
5574
5575 static bfd_byte *
5576 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5577 {
5578 p = restfpr (abfd, p, r);
5579 bfd_put_32 (abfd, BLR, p);
5580 return p + 4;
5581 }
5582
5583 static bfd_byte *
5584 savevr (bfd *abfd, bfd_byte *p, int r)
5585 {
5586 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5587 p = p + 4;
5588 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5589 return p + 4;
5590 }
5591
5592 static bfd_byte *
5593 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5594 {
5595 p = savevr (abfd, p, r);
5596 bfd_put_32 (abfd, BLR, p);
5597 return p + 4;
5598 }
5599
5600 static bfd_byte *
5601 restvr (bfd *abfd, bfd_byte *p, int r)
5602 {
5603 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5604 p = p + 4;
5605 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5606 return p + 4;
5607 }
5608
5609 static bfd_byte *
5610 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5611 {
5612 p = restvr (abfd, p, r);
5613 bfd_put_32 (abfd, BLR, p);
5614 return p + 4;
5615 }
5616
5617 /* Called via elf_link_hash_traverse to transfer dynamic linking
5618 information on function code symbol entries to their corresponding
5619 function descriptor symbol entries. */
5620
5621 static bfd_boolean
5622 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5623 {
5624 struct bfd_link_info *info;
5625 struct ppc_link_hash_table *htab;
5626 struct plt_entry *ent;
5627 struct ppc_link_hash_entry *fh;
5628 struct ppc_link_hash_entry *fdh;
5629 bfd_boolean force_local;
5630
5631 fh = (struct ppc_link_hash_entry *) h;
5632 if (fh->elf.root.type == bfd_link_hash_indirect)
5633 return TRUE;
5634
5635 if (fh->elf.root.type == bfd_link_hash_warning)
5636 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5637
5638 info = inf;
5639 htab = ppc_hash_table (info);
5640
5641 /* Resolve undefined references to dot-symbols as the value
5642 in the function descriptor, if we have one in a regular object.
5643 This is to satisfy cases like ".quad .foo". Calls to functions
5644 in dynamic objects are handled elsewhere. */
5645 if (fh->elf.root.type == bfd_link_hash_undefweak
5646 && fh->was_undefined
5647 && (fh->oh->elf.root.type == bfd_link_hash_defined
5648 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5649 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5650 && opd_entry_value (fh->oh->elf.root.u.def.section,
5651 fh->oh->elf.root.u.def.value,
5652 &fh->elf.root.u.def.section,
5653 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5654 {
5655 fh->elf.root.type = fh->oh->elf.root.type;
5656 fh->elf.forced_local = 1;
5657 fh->elf.def_regular = fh->oh->elf.def_regular;
5658 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5659 }
5660
5661 /* If this is a function code symbol, transfer dynamic linking
5662 information to the function descriptor symbol. */
5663 if (!fh->is_func)
5664 return TRUE;
5665
5666 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5667 if (ent->plt.refcount > 0)
5668 break;
5669 if (ent == NULL
5670 || fh->elf.root.root.string[0] != '.'
5671 || fh->elf.root.root.string[1] == '\0')
5672 return TRUE;
5673
5674 /* Find the corresponding function descriptor symbol. Create it
5675 as undefined if necessary. */
5676
5677 fdh = get_fdh (fh, htab);
5678 if (fdh != NULL)
5679 while (fdh->elf.root.type == bfd_link_hash_indirect
5680 || fdh->elf.root.type == bfd_link_hash_warning)
5681 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5682
5683 if (fdh == NULL
5684 && info->shared
5685 && (fh->elf.root.type == bfd_link_hash_undefined
5686 || fh->elf.root.type == bfd_link_hash_undefweak))
5687 {
5688 fdh = make_fdh (info, fh);
5689 if (fdh == NULL)
5690 return FALSE;
5691 }
5692
5693 /* Fake function descriptors are made undefweak. If the function
5694 code symbol is strong undefined, make the fake sym the same.
5695 If the function code symbol is defined, then force the fake
5696 descriptor local; We can't support overriding of symbols in a
5697 shared library on a fake descriptor. */
5698
5699 if (fdh != NULL
5700 && fdh->fake
5701 && fdh->elf.root.type == bfd_link_hash_undefweak)
5702 {
5703 if (fh->elf.root.type == bfd_link_hash_undefined)
5704 {
5705 fdh->elf.root.type = bfd_link_hash_undefined;
5706 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5707 }
5708 else if (fh->elf.root.type == bfd_link_hash_defined
5709 || fh->elf.root.type == bfd_link_hash_defweak)
5710 {
5711 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5712 }
5713 }
5714
5715 if (fdh != NULL
5716 && !fdh->elf.forced_local
5717 && (info->shared
5718 || fdh->elf.def_dynamic
5719 || fdh->elf.ref_dynamic
5720 || (fdh->elf.root.type == bfd_link_hash_undefweak
5721 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5722 {
5723 if (fdh->elf.dynindx == -1)
5724 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5725 return FALSE;
5726 fdh->elf.ref_regular |= fh->elf.ref_regular;
5727 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5728 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5729 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5730 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5731 {
5732 move_plt_plist (fh, fdh);
5733 fdh->elf.needs_plt = 1;
5734 }
5735 fdh->is_func_descriptor = 1;
5736 fdh->oh = fh;
5737 fh->oh = fdh;
5738 }
5739
5740 /* Now that the info is on the function descriptor, clear the
5741 function code sym info. Any function code syms for which we
5742 don't have a definition in a regular file, we force local.
5743 This prevents a shared library from exporting syms that have
5744 been imported from another library. Function code syms that
5745 are really in the library we must leave global to prevent the
5746 linker dragging in a definition from a static library. */
5747 force_local = (!fh->elf.def_regular
5748 || fdh == NULL
5749 || !fdh->elf.def_regular
5750 || fdh->elf.forced_local);
5751 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5752
5753 return TRUE;
5754 }
5755
5756 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5757 this hook to a) provide some gcc support functions, and b) transfer
5758 dynamic linking information gathered so far on function code symbol
5759 entries, to their corresponding function descriptor symbol entries. */
5760
5761 static bfd_boolean
5762 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5763 struct bfd_link_info *info)
5764 {
5765 struct ppc_link_hash_table *htab;
5766 unsigned int i;
5767 const struct sfpr_def_parms funcs[] =
5768 {
5769 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5770 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5771 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5772 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5773 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5774 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5775 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5776 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5777 { "._savef", 14, 31, savefpr, savefpr1_tail },
5778 { "._restf", 14, 31, restfpr, restfpr1_tail },
5779 { "_savevr_", 20, 31, savevr, savevr_tail },
5780 { "_restvr_", 20, 31, restvr, restvr_tail }
5781 };
5782
5783 htab = ppc_hash_table (info);
5784 if (htab->sfpr == NULL)
5785 /* We don't have any relocs. */
5786 return TRUE;
5787
5788 /* Provide any missing _save* and _rest* functions. */
5789 htab->sfpr->size = 0;
5790 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5791 if (!sfpr_define (info, &funcs[i]))
5792 return FALSE;
5793
5794 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5795
5796 if (htab->sfpr->size == 0)
5797 htab->sfpr->flags |= SEC_EXCLUDE;
5798
5799 return TRUE;
5800 }
5801
5802 /* Adjust a symbol defined by a dynamic object and referenced by a
5803 regular object. The current definition is in some section of the
5804 dynamic object, but we're not including those sections. We have to
5805 change the definition to something the rest of the link can
5806 understand. */
5807
5808 static bfd_boolean
5809 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5810 struct elf_link_hash_entry *h)
5811 {
5812 struct ppc_link_hash_table *htab;
5813 asection *s;
5814
5815 htab = ppc_hash_table (info);
5816
5817 /* Deal with function syms. */
5818 if (h->type == STT_FUNC
5819 || h->needs_plt)
5820 {
5821 /* Clear procedure linkage table information for any symbol that
5822 won't need a .plt entry. */
5823 struct plt_entry *ent;
5824 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5825 if (ent->plt.refcount > 0)
5826 break;
5827 if (ent == NULL
5828 || SYMBOL_CALLS_LOCAL (info, h)
5829 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5830 && h->root.type == bfd_link_hash_undefweak))
5831 {
5832 h->plt.plist = NULL;
5833 h->needs_plt = 0;
5834 }
5835 }
5836 else
5837 h->plt.plist = NULL;
5838
5839 /* If this is a weak symbol, and there is a real definition, the
5840 processor independent code will have arranged for us to see the
5841 real definition first, and we can just use the same value. */
5842 if (h->u.weakdef != NULL)
5843 {
5844 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5845 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5846 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5847 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5848 if (ELIMINATE_COPY_RELOCS)
5849 h->non_got_ref = h->u.weakdef->non_got_ref;
5850 return TRUE;
5851 }
5852
5853 /* If we are creating a shared library, we must presume that the
5854 only references to the symbol are via the global offset table.
5855 For such cases we need not do anything here; the relocations will
5856 be handled correctly by relocate_section. */
5857 if (info->shared)
5858 return TRUE;
5859
5860 /* If there are no references to this symbol that do not use the
5861 GOT, we don't need to generate a copy reloc. */
5862 if (!h->non_got_ref)
5863 return TRUE;
5864
5865 /* Don't generate a copy reloc for symbols defined in the executable. */
5866 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
5867 return TRUE;
5868
5869 if (ELIMINATE_COPY_RELOCS)
5870 {
5871 struct ppc_link_hash_entry * eh;
5872 struct ppc_dyn_relocs *p;
5873
5874 eh = (struct ppc_link_hash_entry *) h;
5875 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5876 {
5877 s = p->sec->output_section;
5878 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5879 break;
5880 }
5881
5882 /* If we didn't find any dynamic relocs in read-only sections, then
5883 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
5884 if (p == NULL)
5885 {
5886 h->non_got_ref = 0;
5887 return TRUE;
5888 }
5889 }
5890
5891 if (h->plt.plist != NULL)
5892 {
5893 /* We should never get here, but unfortunately there are versions
5894 of gcc out there that improperly (for this ABI) put initialized
5895 function pointers, vtable refs and suchlike in read-only
5896 sections. Allow them to proceed, but warn that this might
5897 break at runtime. */
5898 (*_bfd_error_handler)
5899 (_("copy reloc against `%s' requires lazy plt linking; "
5900 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
5901 h->root.root.string);
5902 }
5903
5904 /* This is a reference to a symbol defined by a dynamic object which
5905 is not a function. */
5906
5907 if (h->size == 0)
5908 {
5909 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5910 h->root.root.string);
5911 return TRUE;
5912 }
5913
5914 /* We must allocate the symbol in our .dynbss section, which will
5915 become part of the .bss section of the executable. There will be
5916 an entry for this symbol in the .dynsym section. The dynamic
5917 object will contain position independent code, so all references
5918 from the dynamic object to this symbol will go through the global
5919 offset table. The dynamic linker will use the .dynsym entry to
5920 determine the address it must put in the global offset table, so
5921 both the dynamic object and the regular object will refer to the
5922 same memory location for the variable. */
5923
5924 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
5925 to copy the initial value out of the dynamic object and into the
5926 runtime process image. We need to remember the offset into the
5927 .rela.bss section we are going to use. */
5928 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5929 {
5930 htab->relbss->size += sizeof (Elf64_External_Rela);
5931 h->needs_copy = 1;
5932 }
5933
5934 s = htab->dynbss;
5935
5936 return _bfd_elf_adjust_dynamic_copy (h, s);
5937 }
5938
5939 /* If given a function descriptor symbol, hide both the function code
5940 sym and the descriptor. */
5941 static void
5942 ppc64_elf_hide_symbol (struct bfd_link_info *info,
5943 struct elf_link_hash_entry *h,
5944 bfd_boolean force_local)
5945 {
5946 struct ppc_link_hash_entry *eh;
5947 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
5948
5949 eh = (struct ppc_link_hash_entry *) h;
5950 if (eh->is_func_descriptor)
5951 {
5952 struct ppc_link_hash_entry *fh = eh->oh;
5953
5954 if (fh == NULL)
5955 {
5956 const char *p, *q;
5957 struct ppc_link_hash_table *htab;
5958 char save;
5959
5960 /* We aren't supposed to use alloca in BFD because on
5961 systems which do not have alloca the version in libiberty
5962 calls xmalloc, which might cause the program to crash
5963 when it runs out of memory. This function doesn't have a
5964 return status, so there's no way to gracefully return an
5965 error. So cheat. We know that string[-1] can be safely
5966 accessed; It's either a string in an ELF string table,
5967 or allocated in an objalloc structure. */
5968
5969 p = eh->elf.root.root.string - 1;
5970 save = *p;
5971 *(char *) p = '.';
5972 htab = ppc_hash_table (info);
5973 fh = (struct ppc_link_hash_entry *)
5974 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5975 *(char *) p = save;
5976
5977 /* Unfortunately, if it so happens that the string we were
5978 looking for was allocated immediately before this string,
5979 then we overwrote the string terminator. That's the only
5980 reason the lookup should fail. */
5981 if (fh == NULL)
5982 {
5983 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
5984 while (q >= eh->elf.root.root.string && *q == *p)
5985 --q, --p;
5986 if (q < eh->elf.root.root.string && *p == '.')
5987 fh = (struct ppc_link_hash_entry *)
5988 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
5989 }
5990 if (fh != NULL)
5991 {
5992 eh->oh = fh;
5993 fh->oh = eh;
5994 }
5995 }
5996 if (fh != NULL)
5997 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5998 }
5999 }
6000
6001 static bfd_boolean
6002 get_sym_h (struct elf_link_hash_entry **hp,
6003 Elf_Internal_Sym **symp,
6004 asection **symsecp,
6005 char **tls_maskp,
6006 Elf_Internal_Sym **locsymsp,
6007 unsigned long r_symndx,
6008 bfd *ibfd)
6009 {
6010 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6011
6012 if (r_symndx >= symtab_hdr->sh_info)
6013 {
6014 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6015 struct elf_link_hash_entry *h;
6016
6017 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6018 while (h->root.type == bfd_link_hash_indirect
6019 || h->root.type == bfd_link_hash_warning)
6020 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6021
6022 if (hp != NULL)
6023 *hp = h;
6024
6025 if (symp != NULL)
6026 *symp = NULL;
6027
6028 if (symsecp != NULL)
6029 {
6030 asection *symsec = NULL;
6031 if (h->root.type == bfd_link_hash_defined
6032 || h->root.type == bfd_link_hash_defweak)
6033 symsec = h->root.u.def.section;
6034 *symsecp = symsec;
6035 }
6036
6037 if (tls_maskp != NULL)
6038 {
6039 struct ppc_link_hash_entry *eh;
6040
6041 eh = (struct ppc_link_hash_entry *) h;
6042 *tls_maskp = &eh->tls_mask;
6043 }
6044 }
6045 else
6046 {
6047 Elf_Internal_Sym *sym;
6048 Elf_Internal_Sym *locsyms = *locsymsp;
6049
6050 if (locsyms == NULL)
6051 {
6052 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6053 if (locsyms == NULL)
6054 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6055 symtab_hdr->sh_info,
6056 0, NULL, NULL, NULL);
6057 if (locsyms == NULL)
6058 return FALSE;
6059 *locsymsp = locsyms;
6060 }
6061 sym = locsyms + r_symndx;
6062
6063 if (hp != NULL)
6064 *hp = NULL;
6065
6066 if (symp != NULL)
6067 *symp = sym;
6068
6069 if (symsecp != NULL)
6070 {
6071 asection *symsec = NULL;
6072 if ((sym->st_shndx != SHN_UNDEF
6073 && sym->st_shndx < SHN_LORESERVE)
6074 || sym->st_shndx > SHN_HIRESERVE)
6075 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6076 *symsecp = symsec;
6077 }
6078
6079 if (tls_maskp != NULL)
6080 {
6081 struct got_entry **lgot_ents;
6082 char *tls_mask;
6083
6084 tls_mask = NULL;
6085 lgot_ents = elf_local_got_ents (ibfd);
6086 if (lgot_ents != NULL)
6087 {
6088 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6089 tls_mask = &lgot_masks[r_symndx];
6090 }
6091 *tls_maskp = tls_mask;
6092 }
6093 }
6094 return TRUE;
6095 }
6096
6097 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6098 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6099 type suitable for optimization, and 1 otherwise. */
6100
6101 static int
6102 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6103 Elf_Internal_Sym **locsymsp,
6104 const Elf_Internal_Rela *rel, bfd *ibfd)
6105 {
6106 unsigned long r_symndx;
6107 int next_r;
6108 struct elf_link_hash_entry *h;
6109 Elf_Internal_Sym *sym;
6110 asection *sec;
6111 bfd_vma off;
6112
6113 r_symndx = ELF64_R_SYM (rel->r_info);
6114 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6115 return 0;
6116
6117 if ((*tls_maskp != NULL && **tls_maskp != 0)
6118 || sec == NULL
6119 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6120 return 1;
6121
6122 /* Look inside a TOC section too. */
6123 if (h != NULL)
6124 {
6125 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6126 off = h->root.u.def.value;
6127 }
6128 else
6129 off = sym->st_value;
6130 off += rel->r_addend;
6131 BFD_ASSERT (off % 8 == 0);
6132 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6133 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6134 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6135 return 0;
6136 if (toc_symndx != NULL)
6137 *toc_symndx = r_symndx;
6138 if ((h == NULL
6139 || ((h->root.type == bfd_link_hash_defined
6140 || h->root.type == bfd_link_hash_defweak)
6141 && !h->def_dynamic))
6142 && (next_r == -1 || next_r == -2))
6143 return 1 - next_r;
6144 return 1;
6145 }
6146
6147 /* Adjust all global syms defined in opd sections. In gcc generated
6148 code for the old ABI, these will already have been done. */
6149
6150 static bfd_boolean
6151 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6152 {
6153 struct ppc_link_hash_entry *eh;
6154 asection *sym_sec;
6155 struct _opd_sec_data *opd;
6156
6157 if (h->root.type == bfd_link_hash_indirect)
6158 return TRUE;
6159
6160 if (h->root.type == bfd_link_hash_warning)
6161 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6162
6163 if (h->root.type != bfd_link_hash_defined
6164 && h->root.type != bfd_link_hash_defweak)
6165 return TRUE;
6166
6167 eh = (struct ppc_link_hash_entry *) h;
6168 if (eh->adjust_done)
6169 return TRUE;
6170
6171 sym_sec = eh->elf.root.u.def.section;
6172 opd = get_opd_info (sym_sec);
6173 if (opd != NULL && opd->adjust != NULL)
6174 {
6175 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6176 if (adjust == -1)
6177 {
6178 /* This entry has been deleted. */
6179 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6180 if (dsec == NULL)
6181 {
6182 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6183 if (elf_discarded_section (dsec))
6184 {
6185 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6186 break;
6187 }
6188 }
6189 eh->elf.root.u.def.value = 0;
6190 eh->elf.root.u.def.section = dsec;
6191 }
6192 else
6193 eh->elf.root.u.def.value += adjust;
6194 eh->adjust_done = 1;
6195 }
6196 return TRUE;
6197 }
6198
6199 /* Handles decrementing dynamic reloc counts for the reloc specified by
6200 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6201 have already been determined. */
6202
6203 static bfd_boolean
6204 dec_dynrel_count (bfd_vma r_info,
6205 asection *sec,
6206 struct bfd_link_info *info,
6207 Elf_Internal_Sym **local_syms,
6208 struct elf_link_hash_entry *h,
6209 asection *sym_sec)
6210 {
6211 enum elf_ppc64_reloc_type r_type;
6212 struct ppc_dyn_relocs *p;
6213 struct ppc_dyn_relocs **pp;
6214
6215 /* Can this reloc be dynamic? This switch, and later tests here
6216 should be kept in sync with the code in check_relocs. */
6217 r_type = ELF64_R_TYPE (r_info);
6218 switch (r_type)
6219 {
6220 default:
6221 return TRUE;
6222
6223 case R_PPC64_TPREL16:
6224 case R_PPC64_TPREL16_LO:
6225 case R_PPC64_TPREL16_HI:
6226 case R_PPC64_TPREL16_HA:
6227 case R_PPC64_TPREL16_DS:
6228 case R_PPC64_TPREL16_LO_DS:
6229 case R_PPC64_TPREL16_HIGHER:
6230 case R_PPC64_TPREL16_HIGHERA:
6231 case R_PPC64_TPREL16_HIGHEST:
6232 case R_PPC64_TPREL16_HIGHESTA:
6233 if (!info->shared)
6234 return TRUE;
6235
6236 case R_PPC64_TPREL64:
6237 case R_PPC64_DTPMOD64:
6238 case R_PPC64_DTPREL64:
6239 case R_PPC64_ADDR64:
6240 case R_PPC64_REL30:
6241 case R_PPC64_REL32:
6242 case R_PPC64_REL64:
6243 case R_PPC64_ADDR14:
6244 case R_PPC64_ADDR14_BRNTAKEN:
6245 case R_PPC64_ADDR14_BRTAKEN:
6246 case R_PPC64_ADDR16:
6247 case R_PPC64_ADDR16_DS:
6248 case R_PPC64_ADDR16_HA:
6249 case R_PPC64_ADDR16_HI:
6250 case R_PPC64_ADDR16_HIGHER:
6251 case R_PPC64_ADDR16_HIGHERA:
6252 case R_PPC64_ADDR16_HIGHEST:
6253 case R_PPC64_ADDR16_HIGHESTA:
6254 case R_PPC64_ADDR16_LO:
6255 case R_PPC64_ADDR16_LO_DS:
6256 case R_PPC64_ADDR24:
6257 case R_PPC64_ADDR32:
6258 case R_PPC64_UADDR16:
6259 case R_PPC64_UADDR32:
6260 case R_PPC64_UADDR64:
6261 case R_PPC64_TOC:
6262 break;
6263 }
6264
6265 if (local_syms != NULL)
6266 {
6267 unsigned long r_symndx;
6268 Elf_Internal_Sym *sym;
6269 bfd *ibfd = sec->owner;
6270
6271 r_symndx = ELF64_R_SYM (r_info);
6272 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6273 return FALSE;
6274 }
6275
6276 if ((info->shared
6277 && (MUST_BE_DYN_RELOC (r_type)
6278 || (h != NULL
6279 && (!info->symbolic
6280 || h->root.type == bfd_link_hash_defweak
6281 || !h->def_regular))))
6282 || (ELIMINATE_COPY_RELOCS
6283 && !info->shared
6284 && h != NULL
6285 && (h->root.type == bfd_link_hash_defweak
6286 || !h->def_regular)))
6287 ;
6288 else
6289 return TRUE;
6290
6291 if (h != NULL)
6292 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6293 else
6294 {
6295 if (sym_sec != NULL)
6296 {
6297 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6298 pp = (struct ppc_dyn_relocs **) vpp;
6299 }
6300 else
6301 {
6302 void *vpp = &elf_section_data (sec)->local_dynrel;
6303 pp = (struct ppc_dyn_relocs **) vpp;
6304 }
6305
6306 /* elf_gc_sweep may have already removed all dyn relocs associated
6307 with local syms for a given section. Don't report a dynreloc
6308 miscount. */
6309 if (*pp == NULL)
6310 return TRUE;
6311 }
6312
6313 while ((p = *pp) != NULL)
6314 {
6315 if (p->sec == sec)
6316 {
6317 if (!MUST_BE_DYN_RELOC (r_type))
6318 p->pc_count -= 1;
6319 p->count -= 1;
6320 if (p->count == 0)
6321 *pp = p->next;
6322 return TRUE;
6323 }
6324 pp = &p->next;
6325 }
6326
6327 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6328 sec->owner, sec);
6329 bfd_set_error (bfd_error_bad_value);
6330 return FALSE;
6331 }
6332
6333 /* Remove unused Official Procedure Descriptor entries. Currently we
6334 only remove those associated with functions in discarded link-once
6335 sections, or weakly defined functions that have been overridden. It
6336 would be possible to remove many more entries for statically linked
6337 applications. */
6338
6339 bfd_boolean
6340 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6341 bfd_boolean non_overlapping)
6342 {
6343 bfd *ibfd;
6344 bfd_boolean some_edited = FALSE;
6345 asection *need_pad = NULL;
6346
6347 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6348 {
6349 asection *sec;
6350 Elf_Internal_Rela *relstart, *rel, *relend;
6351 Elf_Internal_Shdr *symtab_hdr;
6352 Elf_Internal_Sym *local_syms;
6353 struct elf_link_hash_entry **sym_hashes;
6354 bfd_vma offset;
6355 struct _opd_sec_data *opd;
6356 bfd_boolean need_edit, add_aux_fields;
6357 bfd_size_type cnt_16b = 0;
6358
6359 sec = bfd_get_section_by_name (ibfd, ".opd");
6360 if (sec == NULL || sec->size == 0)
6361 continue;
6362
6363 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6364 continue;
6365
6366 if (sec->output_section == bfd_abs_section_ptr)
6367 continue;
6368
6369 /* Look through the section relocs. */
6370 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6371 continue;
6372
6373 local_syms = NULL;
6374 symtab_hdr = &elf_symtab_hdr (ibfd);
6375 sym_hashes = elf_sym_hashes (ibfd);
6376
6377 /* Read the relocations. */
6378 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6379 info->keep_memory);
6380 if (relstart == NULL)
6381 return FALSE;
6382
6383 /* First run through the relocs to check they are sane, and to
6384 determine whether we need to edit this opd section. */
6385 need_edit = FALSE;
6386 need_pad = sec;
6387 offset = 0;
6388 relend = relstart + sec->reloc_count;
6389 for (rel = relstart; rel < relend; )
6390 {
6391 enum elf_ppc64_reloc_type r_type;
6392 unsigned long r_symndx;
6393 asection *sym_sec;
6394 struct elf_link_hash_entry *h;
6395 Elf_Internal_Sym *sym;
6396
6397 /* .opd contains a regular array of 16 or 24 byte entries. We're
6398 only interested in the reloc pointing to a function entry
6399 point. */
6400 if (rel->r_offset != offset
6401 || rel + 1 >= relend
6402 || (rel + 1)->r_offset != offset + 8)
6403 {
6404 /* If someone messes with .opd alignment then after a
6405 "ld -r" we might have padding in the middle of .opd.
6406 Also, there's nothing to prevent someone putting
6407 something silly in .opd with the assembler. No .opd
6408 optimization for them! */
6409 broken_opd:
6410 (*_bfd_error_handler)
6411 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6412 need_edit = FALSE;
6413 break;
6414 }
6415
6416 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6417 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6418 {
6419 (*_bfd_error_handler)
6420 (_("%B: unexpected reloc type %u in .opd section"),
6421 ibfd, r_type);
6422 need_edit = FALSE;
6423 break;
6424 }
6425
6426 r_symndx = ELF64_R_SYM (rel->r_info);
6427 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6428 r_symndx, ibfd))
6429 goto error_ret;
6430
6431 if (sym_sec == NULL || sym_sec->owner == NULL)
6432 {
6433 const char *sym_name;
6434 if (h != NULL)
6435 sym_name = h->root.root.string;
6436 else
6437 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6438 sym_sec);
6439
6440 (*_bfd_error_handler)
6441 (_("%B: undefined sym `%s' in .opd section"),
6442 ibfd, sym_name);
6443 need_edit = FALSE;
6444 break;
6445 }
6446
6447 /* opd entries are always for functions defined in the
6448 current input bfd. If the symbol isn't defined in the
6449 input bfd, then we won't be using the function in this
6450 bfd; It must be defined in a linkonce section in another
6451 bfd, or is weak. It's also possible that we are
6452 discarding the function due to a linker script /DISCARD/,
6453 which we test for via the output_section. */
6454 if (sym_sec->owner != ibfd
6455 || sym_sec->output_section == bfd_abs_section_ptr)
6456 need_edit = TRUE;
6457
6458 rel += 2;
6459 if (rel == relend
6460 || (rel + 1 == relend && rel->r_offset == offset + 16))
6461 {
6462 if (sec->size == offset + 24)
6463 {
6464 need_pad = NULL;
6465 break;
6466 }
6467 if (rel == relend && sec->size == offset + 16)
6468 {
6469 cnt_16b++;
6470 break;
6471 }
6472 goto broken_opd;
6473 }
6474
6475 if (rel->r_offset == offset + 24)
6476 offset += 24;
6477 else if (rel->r_offset != offset + 16)
6478 goto broken_opd;
6479 else if (rel + 1 < relend
6480 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6481 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6482 {
6483 offset += 16;
6484 cnt_16b++;
6485 }
6486 else if (rel + 2 < relend
6487 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6488 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6489 {
6490 offset += 24;
6491 rel += 1;
6492 }
6493 else
6494 goto broken_opd;
6495 }
6496
6497 add_aux_fields = non_overlapping && cnt_16b > 0;
6498
6499 if (need_edit || add_aux_fields)
6500 {
6501 Elf_Internal_Rela *write_rel;
6502 bfd_byte *rptr, *wptr;
6503 bfd_byte *new_contents = NULL;
6504 bfd_boolean skip;
6505 long opd_ent_size;
6506 bfd_size_type amt;
6507
6508 amt = sec->size * sizeof (long) / 8;
6509 opd = &ppc64_elf_section_data (sec)->u.opd;
6510 opd->adjust = bfd_zalloc (obfd, amt);
6511 if (opd->adjust == NULL)
6512 return FALSE;
6513 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6514
6515 /* This seems a waste of time as input .opd sections are all
6516 zeros as generated by gcc, but I suppose there's no reason
6517 this will always be so. We might start putting something in
6518 the third word of .opd entries. */
6519 if ((sec->flags & SEC_IN_MEMORY) == 0)
6520 {
6521 bfd_byte *loc;
6522 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6523 {
6524 if (loc != NULL)
6525 free (loc);
6526 error_ret:
6527 if (local_syms != NULL
6528 && symtab_hdr->contents != (unsigned char *) local_syms)
6529 free (local_syms);
6530 if (elf_section_data (sec)->relocs != relstart)
6531 free (relstart);
6532 return FALSE;
6533 }
6534 sec->contents = loc;
6535 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6536 }
6537
6538 elf_section_data (sec)->relocs = relstart;
6539
6540 new_contents = sec->contents;
6541 if (add_aux_fields)
6542 {
6543 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6544 if (new_contents == NULL)
6545 return FALSE;
6546 need_pad = FALSE;
6547 }
6548 wptr = new_contents;
6549 rptr = sec->contents;
6550
6551 write_rel = relstart;
6552 skip = FALSE;
6553 offset = 0;
6554 opd_ent_size = 0;
6555 for (rel = relstart; rel < relend; rel++)
6556 {
6557 unsigned long r_symndx;
6558 asection *sym_sec;
6559 struct elf_link_hash_entry *h;
6560 Elf_Internal_Sym *sym;
6561
6562 r_symndx = ELF64_R_SYM (rel->r_info);
6563 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6564 r_symndx, ibfd))
6565 goto error_ret;
6566
6567 if (rel->r_offset == offset)
6568 {
6569 struct ppc_link_hash_entry *fdh = NULL;
6570
6571 /* See if the .opd entry is full 24 byte or
6572 16 byte (with fd_aux entry overlapped with next
6573 fd_func). */
6574 opd_ent_size = 24;
6575 if ((rel + 2 == relend && sec->size == offset + 16)
6576 || (rel + 3 < relend
6577 && rel[2].r_offset == offset + 16
6578 && rel[3].r_offset == offset + 24
6579 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6580 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6581 opd_ent_size = 16;
6582
6583 if (h != NULL
6584 && h->root.root.string[0] == '.')
6585 {
6586 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6587 ppc_hash_table (info));
6588 if (fdh != NULL
6589 && fdh->elf.root.type != bfd_link_hash_defined
6590 && fdh->elf.root.type != bfd_link_hash_defweak)
6591 fdh = NULL;
6592 }
6593
6594 skip = (sym_sec->owner != ibfd
6595 || sym_sec->output_section == bfd_abs_section_ptr);
6596 if (skip)
6597 {
6598 if (fdh != NULL && sym_sec->owner == ibfd)
6599 {
6600 /* Arrange for the function descriptor sym
6601 to be dropped. */
6602 fdh->elf.root.u.def.value = 0;
6603 fdh->elf.root.u.def.section = sym_sec;
6604 }
6605 opd->adjust[rel->r_offset / 8] = -1;
6606 }
6607 else
6608 {
6609 /* We'll be keeping this opd entry. */
6610
6611 if (fdh != NULL)
6612 {
6613 /* Redefine the function descriptor symbol to
6614 this location in the opd section. It is
6615 necessary to update the value here rather
6616 than using an array of adjustments as we do
6617 for local symbols, because various places
6618 in the generic ELF code use the value
6619 stored in u.def.value. */
6620 fdh->elf.root.u.def.value = wptr - new_contents;
6621 fdh->adjust_done = 1;
6622 }
6623
6624 /* Local syms are a bit tricky. We could
6625 tweak them as they can be cached, but
6626 we'd need to look through the local syms
6627 for the function descriptor sym which we
6628 don't have at the moment. So keep an
6629 array of adjustments. */
6630 opd->adjust[rel->r_offset / 8]
6631 = (wptr - new_contents) - (rptr - sec->contents);
6632
6633 if (wptr != rptr)
6634 memcpy (wptr, rptr, opd_ent_size);
6635 wptr += opd_ent_size;
6636 if (add_aux_fields && opd_ent_size == 16)
6637 {
6638 memset (wptr, '\0', 8);
6639 wptr += 8;
6640 }
6641 }
6642 rptr += opd_ent_size;
6643 offset += opd_ent_size;
6644 }
6645
6646 if (skip)
6647 {
6648 if (!NO_OPD_RELOCS
6649 && !info->relocatable
6650 && !dec_dynrel_count (rel->r_info, sec, info,
6651 NULL, h, sym_sec))
6652 goto error_ret;
6653 }
6654 else
6655 {
6656 /* We need to adjust any reloc offsets to point to the
6657 new opd entries. While we're at it, we may as well
6658 remove redundant relocs. */
6659 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
6660 if (write_rel != rel)
6661 memcpy (write_rel, rel, sizeof (*rel));
6662 ++write_rel;
6663 }
6664 }
6665
6666 sec->size = wptr - new_contents;
6667 sec->reloc_count = write_rel - relstart;
6668 if (add_aux_fields)
6669 {
6670 free (sec->contents);
6671 sec->contents = new_contents;
6672 }
6673
6674 /* Fudge the header size too, as this is used later in
6675 elf_bfd_final_link if we are emitting relocs. */
6676 elf_section_data (sec)->rel_hdr.sh_size
6677 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6678 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6679 some_edited = TRUE;
6680 }
6681 else if (elf_section_data (sec)->relocs != relstart)
6682 free (relstart);
6683
6684 if (local_syms != NULL
6685 && symtab_hdr->contents != (unsigned char *) local_syms)
6686 {
6687 if (!info->keep_memory)
6688 free (local_syms);
6689 else
6690 symtab_hdr->contents = (unsigned char *) local_syms;
6691 }
6692 }
6693
6694 if (some_edited)
6695 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6696
6697 /* If we are doing a final link and the last .opd entry is just 16 byte
6698 long, add a 8 byte padding after it. */
6699 if (need_pad != NULL && !info->relocatable)
6700 {
6701 bfd_byte *p;
6702
6703 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6704 {
6705 BFD_ASSERT (need_pad->size > 0);
6706
6707 p = bfd_malloc (need_pad->size + 8);
6708 if (p == NULL)
6709 return FALSE;
6710
6711 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6712 p, 0, need_pad->size))
6713 return FALSE;
6714
6715 need_pad->contents = p;
6716 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6717 }
6718 else
6719 {
6720 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6721 if (p == NULL)
6722 return FALSE;
6723
6724 need_pad->contents = p;
6725 }
6726
6727 memset (need_pad->contents + need_pad->size, 0, 8);
6728 need_pad->size += 8;
6729 }
6730
6731 return TRUE;
6732 }
6733
6734 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6735
6736 asection *
6737 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6738 {
6739 struct ppc_link_hash_table *htab;
6740
6741 htab = ppc_hash_table (info);
6742 if (htab->tls_get_addr != NULL)
6743 {
6744 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6745
6746 while (h->elf.root.type == bfd_link_hash_indirect
6747 || h->elf.root.type == bfd_link_hash_warning)
6748 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6749
6750 htab->tls_get_addr = h;
6751
6752 if (htab->tls_get_addr_fd == NULL
6753 && h->oh != NULL
6754 && h->oh->is_func_descriptor
6755 && (h->oh->elf.root.type == bfd_link_hash_defined
6756 || h->oh->elf.root.type == bfd_link_hash_defweak))
6757 htab->tls_get_addr_fd = h->oh;
6758 }
6759
6760 if (htab->tls_get_addr_fd != NULL)
6761 {
6762 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6763
6764 while (h->elf.root.type == bfd_link_hash_indirect
6765 || h->elf.root.type == bfd_link_hash_warning)
6766 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6767
6768 htab->tls_get_addr_fd = h;
6769 }
6770
6771 return _bfd_elf_tls_setup (obfd, info);
6772 }
6773
6774 /* Run through all the TLS relocs looking for optimization
6775 opportunities. The linker has been hacked (see ppc64elf.em) to do
6776 a preliminary section layout so that we know the TLS segment
6777 offsets. We can't optimize earlier because some optimizations need
6778 to know the tp offset, and we need to optimize before allocating
6779 dynamic relocations. */
6780
6781 bfd_boolean
6782 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6783 {
6784 bfd *ibfd;
6785 asection *sec;
6786 struct ppc_link_hash_table *htab;
6787 int pass;
6788
6789 if (info->relocatable || info->shared)
6790 return TRUE;
6791
6792 htab = ppc_hash_table (info);
6793 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6794 {
6795 Elf_Internal_Sym *locsyms = NULL;
6796 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6797 unsigned char *toc_ref = NULL;
6798
6799 /* Look at all the sections for this file. Make two passes over
6800 the relocs. On the first pass, mark toc entries involved
6801 with tls relocs, and check that tls relocs involved in
6802 setting up a tls_get_addr call are indeed followed by such a
6803 call. If they are not, exclude them from the optimizations
6804 done on the second pass. */
6805 for (pass = 0; pass < 2; ++pass)
6806 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6807 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6808 {
6809 Elf_Internal_Rela *relstart, *rel, *relend;
6810
6811 /* Read the relocations. */
6812 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6813 info->keep_memory);
6814 if (relstart == NULL)
6815 return FALSE;
6816
6817 relend = relstart + sec->reloc_count;
6818 for (rel = relstart; rel < relend; rel++)
6819 {
6820 enum elf_ppc64_reloc_type r_type;
6821 unsigned long r_symndx;
6822 struct elf_link_hash_entry *h;
6823 Elf_Internal_Sym *sym;
6824 asection *sym_sec;
6825 char *tls_mask;
6826 char tls_set, tls_clear, tls_type = 0;
6827 bfd_vma value;
6828 bfd_boolean ok_tprel, is_local;
6829 long toc_ref_index = 0;
6830 int expecting_tls_get_addr = 0;
6831
6832 r_symndx = ELF64_R_SYM (rel->r_info);
6833 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6834 r_symndx, ibfd))
6835 {
6836 err_free_rel:
6837 if (elf_section_data (sec)->relocs != relstart)
6838 free (relstart);
6839 if (toc_ref != NULL)
6840 free (toc_ref);
6841 if (locsyms != NULL
6842 && (elf_symtab_hdr (ibfd).contents
6843 != (unsigned char *) locsyms))
6844 free (locsyms);
6845 return FALSE;
6846 }
6847
6848 if (h != NULL)
6849 {
6850 if (h->root.type != bfd_link_hash_defined
6851 && h->root.type != bfd_link_hash_defweak)
6852 continue;
6853 value = h->root.u.def.value;
6854 }
6855 else
6856 /* Symbols referenced by TLS relocs must be of type
6857 STT_TLS. So no need for .opd local sym adjust. */
6858 value = sym->st_value;
6859
6860 ok_tprel = FALSE;
6861 is_local = FALSE;
6862 if (h == NULL
6863 || !h->def_dynamic)
6864 {
6865 is_local = TRUE;
6866 value += sym_sec->output_offset;
6867 value += sym_sec->output_section->vma;
6868 value -= htab->elf.tls_sec->vma;
6869 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
6870 < (bfd_vma) 1 << 32);
6871 }
6872
6873 r_type = ELF64_R_TYPE (rel->r_info);
6874 switch (r_type)
6875 {
6876 case R_PPC64_GOT_TLSLD16:
6877 case R_PPC64_GOT_TLSLD16_LO:
6878 expecting_tls_get_addr = 1;
6879 /* Fall thru */
6880
6881 case R_PPC64_GOT_TLSLD16_HI:
6882 case R_PPC64_GOT_TLSLD16_HA:
6883 /* These relocs should never be against a symbol
6884 defined in a shared lib. Leave them alone if
6885 that turns out to be the case. */
6886 if (!is_local)
6887 continue;
6888
6889 /* LD -> LE */
6890 tls_set = 0;
6891 tls_clear = TLS_LD;
6892 tls_type = TLS_TLS | TLS_LD;
6893 break;
6894
6895 case R_PPC64_GOT_TLSGD16:
6896 case R_PPC64_GOT_TLSGD16_LO:
6897 expecting_tls_get_addr = 1;
6898 /* Fall thru */
6899
6900 case R_PPC64_GOT_TLSGD16_HI:
6901 case R_PPC64_GOT_TLSGD16_HA:
6902 if (ok_tprel)
6903 /* GD -> LE */
6904 tls_set = 0;
6905 else
6906 /* GD -> IE */
6907 tls_set = TLS_TLS | TLS_TPRELGD;
6908 tls_clear = TLS_GD;
6909 tls_type = TLS_TLS | TLS_GD;
6910 break;
6911
6912 case R_PPC64_GOT_TPREL16_DS:
6913 case R_PPC64_GOT_TPREL16_LO_DS:
6914 case R_PPC64_GOT_TPREL16_HI:
6915 case R_PPC64_GOT_TPREL16_HA:
6916 if (ok_tprel)
6917 {
6918 /* IE -> LE */
6919 tls_set = 0;
6920 tls_clear = TLS_TPREL;
6921 tls_type = TLS_TLS | TLS_TPREL;
6922 break;
6923 }
6924 continue;
6925
6926 case R_PPC64_TOC16:
6927 case R_PPC64_TOC16_LO:
6928 case R_PPC64_TLS:
6929 if (sym_sec == NULL || sym_sec != toc)
6930 continue;
6931
6932 /* Mark this toc entry as referenced by a TLS
6933 code sequence. We can do that now in the
6934 case of R_PPC64_TLS, and after checking for
6935 tls_get_addr for the TOC16 relocs. */
6936 if (toc_ref == NULL)
6937 {
6938 toc_ref = bfd_zmalloc (toc->size / 8);
6939 if (toc_ref == NULL)
6940 goto err_free_rel;
6941 }
6942 if (h != NULL)
6943 value = h->root.u.def.value;
6944 else
6945 value = sym->st_value;
6946 value += rel->r_addend;
6947 BFD_ASSERT (value < toc->size && value % 8 == 0);
6948 toc_ref_index = value / 8;
6949 if (r_type == R_PPC64_TLS)
6950 {
6951 toc_ref[toc_ref_index] = 1;
6952 continue;
6953 }
6954
6955 if (pass != 0 && toc_ref[toc_ref_index] == 0)
6956 continue;
6957
6958 tls_set = 0;
6959 tls_clear = 0;
6960 expecting_tls_get_addr = 2;
6961 break;
6962
6963 case R_PPC64_TPREL64:
6964 if (pass == 0
6965 || sec != toc
6966 || toc_ref == NULL
6967 || !toc_ref[rel->r_offset / 8])
6968 continue;
6969 if (ok_tprel)
6970 {
6971 /* IE -> LE */
6972 tls_set = TLS_EXPLICIT;
6973 tls_clear = TLS_TPREL;
6974 break;
6975 }
6976 continue;
6977
6978 case R_PPC64_DTPMOD64:
6979 if (pass == 0
6980 || sec != toc
6981 || toc_ref == NULL
6982 || !toc_ref[rel->r_offset / 8])
6983 continue;
6984 if (rel + 1 < relend
6985 && (rel[1].r_info
6986 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
6987 && rel[1].r_offset == rel->r_offset + 8)
6988 {
6989 if (ok_tprel)
6990 /* GD -> LE */
6991 tls_set = TLS_EXPLICIT | TLS_GD;
6992 else
6993 /* GD -> IE */
6994 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
6995 tls_clear = TLS_GD;
6996 }
6997 else
6998 {
6999 if (!is_local)
7000 continue;
7001
7002 /* LD -> LE */
7003 tls_set = TLS_EXPLICIT;
7004 tls_clear = TLS_LD;
7005 }
7006 break;
7007
7008 default:
7009 continue;
7010 }
7011
7012 if (pass == 0)
7013 {
7014 if (!expecting_tls_get_addr)
7015 continue;
7016
7017 if (rel + 1 < relend)
7018 {
7019 Elf_Internal_Shdr *symtab_hdr;
7020 enum elf_ppc64_reloc_type r_type2;
7021 unsigned long r_symndx2;
7022 struct elf_link_hash_entry *h2;
7023
7024 symtab_hdr = &elf_symtab_hdr (ibfd);
7025
7026 /* The next instruction should be a call to
7027 __tls_get_addr. Peek at the reloc to be sure. */
7028 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7029 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7030 if (r_symndx2 >= symtab_hdr->sh_info
7031 && (r_type2 == R_PPC64_REL14
7032 || r_type2 == R_PPC64_REL14_BRTAKEN
7033 || r_type2 == R_PPC64_REL14_BRNTAKEN
7034 || r_type2 == R_PPC64_REL24))
7035 {
7036 struct elf_link_hash_entry **sym_hashes;
7037
7038 sym_hashes = elf_sym_hashes (ibfd);
7039
7040 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7041 while (h2->root.type == bfd_link_hash_indirect
7042 || h2->root.type == bfd_link_hash_warning)
7043 h2 = ((struct elf_link_hash_entry *)
7044 h2->root.u.i.link);
7045 if (h2 != NULL
7046 && (h2 == &htab->tls_get_addr->elf
7047 || h2 == &htab->tls_get_addr_fd->elf))
7048 {
7049 if (expecting_tls_get_addr == 2)
7050 {
7051 /* Check for toc tls entries. */
7052 char *toc_tls;
7053 int retval;
7054
7055 retval = get_tls_mask (&toc_tls, NULL,
7056 &locsyms,
7057 rel, ibfd);
7058 if (retval == 0)
7059 goto err_free_rel;
7060 if (retval > 1 && toc_tls != NULL)
7061 toc_ref[toc_ref_index] = 1;
7062 }
7063 continue;
7064 }
7065 }
7066 }
7067
7068 if (expecting_tls_get_addr != 1)
7069 continue;
7070
7071 /* Uh oh, we didn't find the expected call. We
7072 could just mark this symbol to exclude it
7073 from tls optimization but it's safer to skip
7074 the entire section. */
7075 sec->has_tls_reloc = 0;
7076 break;
7077 }
7078
7079 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7080 {
7081 struct plt_entry *ent;
7082 for (ent = htab->tls_get_addr->elf.plt.plist;
7083 ent != NULL;
7084 ent = ent->next)
7085 if (ent->addend == 0)
7086 {
7087 if (ent->plt.refcount > 0)
7088 {
7089 ent->plt.refcount -= 1;
7090 expecting_tls_get_addr = 0;
7091 }
7092 break;
7093 }
7094 }
7095
7096 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7097 {
7098 struct plt_entry *ent;
7099 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7100 ent != NULL;
7101 ent = ent->next)
7102 if (ent->addend == 0)
7103 {
7104 if (ent->plt.refcount > 0)
7105 ent->plt.refcount -= 1;
7106 break;
7107 }
7108 }
7109
7110 if (tls_clear == 0)
7111 continue;
7112
7113 if ((tls_set & TLS_EXPLICIT) == 0)
7114 {
7115 struct got_entry *ent;
7116
7117 /* Adjust got entry for this reloc. */
7118 if (h != NULL)
7119 ent = h->got.glist;
7120 else
7121 ent = elf_local_got_ents (ibfd)[r_symndx];
7122
7123 for (; ent != NULL; ent = ent->next)
7124 if (ent->addend == rel->r_addend
7125 && ent->owner == ibfd
7126 && ent->tls_type == tls_type)
7127 break;
7128 if (ent == NULL)
7129 abort ();
7130
7131 if (tls_set == 0)
7132 {
7133 /* We managed to get rid of a got entry. */
7134 if (ent->got.refcount > 0)
7135 ent->got.refcount -= 1;
7136 }
7137 }
7138 else
7139 {
7140 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7141 we'll lose one or two dyn relocs. */
7142 if (!dec_dynrel_count (rel->r_info, sec, info,
7143 NULL, h, sym_sec))
7144 return FALSE;
7145
7146 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7147 {
7148 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7149 NULL, h, sym_sec))
7150 return FALSE;
7151 }
7152 }
7153
7154 *tls_mask |= tls_set;
7155 *tls_mask &= ~tls_clear;
7156 }
7157
7158 if (elf_section_data (sec)->relocs != relstart)
7159 free (relstart);
7160 }
7161
7162 if (toc_ref != NULL)
7163 free (toc_ref);
7164
7165 if (locsyms != NULL
7166 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7167 {
7168 if (!info->keep_memory)
7169 free (locsyms);
7170 else
7171 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7172 }
7173 }
7174 return TRUE;
7175 }
7176
7177 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7178 the values of any global symbols in a toc section that has been
7179 edited. Globals in toc sections should be a rarity, so this function
7180 sets a flag if any are found in toc sections other than the one just
7181 edited, so that futher hash table traversals can be avoided. */
7182
7183 struct adjust_toc_info
7184 {
7185 asection *toc;
7186 unsigned long *skip;
7187 bfd_boolean global_toc_syms;
7188 };
7189
7190 static bfd_boolean
7191 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7192 {
7193 struct ppc_link_hash_entry *eh;
7194 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7195
7196 if (h->root.type == bfd_link_hash_indirect)
7197 return TRUE;
7198
7199 if (h->root.type == bfd_link_hash_warning)
7200 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7201
7202 if (h->root.type != bfd_link_hash_defined
7203 && h->root.type != bfd_link_hash_defweak)
7204 return TRUE;
7205
7206 eh = (struct ppc_link_hash_entry *) h;
7207 if (eh->adjust_done)
7208 return TRUE;
7209
7210 if (eh->elf.root.u.def.section == toc_inf->toc)
7211 {
7212 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7213 if (skip != (unsigned long) -1)
7214 eh->elf.root.u.def.value -= skip;
7215 else
7216 {
7217 (*_bfd_error_handler)
7218 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7219 eh->elf.root.u.def.section = &bfd_abs_section;
7220 eh->elf.root.u.def.value = 0;
7221 }
7222 eh->adjust_done = 1;
7223 }
7224 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7225 toc_inf->global_toc_syms = TRUE;
7226
7227 return TRUE;
7228 }
7229
7230 /* Examine all relocs referencing .toc sections in order to remove
7231 unused .toc entries. */
7232
7233 bfd_boolean
7234 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7235 {
7236 bfd *ibfd;
7237 struct adjust_toc_info toc_inf;
7238
7239 toc_inf.global_toc_syms = TRUE;
7240 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7241 {
7242 asection *toc, *sec;
7243 Elf_Internal_Shdr *symtab_hdr;
7244 Elf_Internal_Sym *local_syms;
7245 struct elf_link_hash_entry **sym_hashes;
7246 Elf_Internal_Rela *relstart, *rel;
7247 unsigned long *skip, *drop;
7248 unsigned char *used;
7249 unsigned char *keep, last, some_unused;
7250
7251 toc = bfd_get_section_by_name (ibfd, ".toc");
7252 if (toc == NULL
7253 || toc->size == 0
7254 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7255 || elf_discarded_section (toc))
7256 continue;
7257
7258 local_syms = NULL;
7259 symtab_hdr = &elf_symtab_hdr (ibfd);
7260 sym_hashes = elf_sym_hashes (ibfd);
7261
7262 /* Look at sections dropped from the final link. */
7263 skip = NULL;
7264 relstart = NULL;
7265 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7266 {
7267 if (sec->reloc_count == 0
7268 || !elf_discarded_section (sec)
7269 || get_opd_info (sec)
7270 || (sec->flags & SEC_ALLOC) == 0
7271 || (sec->flags & SEC_DEBUGGING) != 0)
7272 continue;
7273
7274 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7275 if (relstart == NULL)
7276 goto error_ret;
7277
7278 /* Run through the relocs to see which toc entries might be
7279 unused. */
7280 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7281 {
7282 enum elf_ppc64_reloc_type r_type;
7283 unsigned long r_symndx;
7284 asection *sym_sec;
7285 struct elf_link_hash_entry *h;
7286 Elf_Internal_Sym *sym;
7287 bfd_vma val;
7288
7289 r_type = ELF64_R_TYPE (rel->r_info);
7290 switch (r_type)
7291 {
7292 default:
7293 continue;
7294
7295 case R_PPC64_TOC16:
7296 case R_PPC64_TOC16_LO:
7297 case R_PPC64_TOC16_HI:
7298 case R_PPC64_TOC16_HA:
7299 case R_PPC64_TOC16_DS:
7300 case R_PPC64_TOC16_LO_DS:
7301 break;
7302 }
7303
7304 r_symndx = ELF64_R_SYM (rel->r_info);
7305 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7306 r_symndx, ibfd))
7307 goto error_ret;
7308
7309 if (sym_sec != toc)
7310 continue;
7311
7312 if (h != NULL)
7313 val = h->root.u.def.value;
7314 else
7315 val = sym->st_value;
7316 val += rel->r_addend;
7317
7318 if (val >= toc->size)
7319 continue;
7320
7321 /* Anything in the toc ought to be aligned to 8 bytes.
7322 If not, don't mark as unused. */
7323 if (val & 7)
7324 continue;
7325
7326 if (skip == NULL)
7327 {
7328 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7329 if (skip == NULL)
7330 goto error_ret;
7331 }
7332
7333 skip[val >> 3] = 1;
7334 }
7335
7336 if (elf_section_data (sec)->relocs != relstart)
7337 free (relstart);
7338 }
7339
7340 if (skip == NULL)
7341 continue;
7342
7343 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7344 if (used == NULL)
7345 {
7346 error_ret:
7347 if (local_syms != NULL
7348 && symtab_hdr->contents != (unsigned char *) local_syms)
7349 free (local_syms);
7350 if (sec != NULL
7351 && relstart != NULL
7352 && elf_section_data (sec)->relocs != relstart)
7353 free (relstart);
7354 if (skip != NULL)
7355 free (skip);
7356 return FALSE;
7357 }
7358
7359 /* Now check all kept sections that might reference the toc.
7360 Check the toc itself last. */
7361 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7362 : ibfd->sections);
7363 sec != NULL;
7364 sec = (sec == toc ? NULL
7365 : sec->next == NULL ? toc
7366 : sec->next == toc && toc->next ? toc->next
7367 : sec->next))
7368 {
7369 int repeat;
7370
7371 if (sec->reloc_count == 0
7372 || elf_discarded_section (sec)
7373 || get_opd_info (sec)
7374 || (sec->flags & SEC_ALLOC) == 0
7375 || (sec->flags & SEC_DEBUGGING) != 0)
7376 continue;
7377
7378 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7379 if (relstart == NULL)
7380 goto error_ret;
7381
7382 /* Mark toc entries referenced as used. */
7383 repeat = 0;
7384 do
7385 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7386 {
7387 enum elf_ppc64_reloc_type r_type;
7388 unsigned long r_symndx;
7389 asection *sym_sec;
7390 struct elf_link_hash_entry *h;
7391 Elf_Internal_Sym *sym;
7392 bfd_vma val;
7393
7394 r_type = ELF64_R_TYPE (rel->r_info);
7395 switch (r_type)
7396 {
7397 case R_PPC64_TOC16:
7398 case R_PPC64_TOC16_LO:
7399 case R_PPC64_TOC16_HI:
7400 case R_PPC64_TOC16_HA:
7401 case R_PPC64_TOC16_DS:
7402 case R_PPC64_TOC16_LO_DS:
7403 /* In case we're taking addresses of toc entries. */
7404 case R_PPC64_ADDR64:
7405 break;
7406
7407 default:
7408 continue;
7409 }
7410
7411 r_symndx = ELF64_R_SYM (rel->r_info);
7412 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7413 r_symndx, ibfd))
7414 {
7415 free (used);
7416 goto error_ret;
7417 }
7418
7419 if (sym_sec != toc)
7420 continue;
7421
7422 if (h != NULL)
7423 val = h->root.u.def.value;
7424 else
7425 val = sym->st_value;
7426 val += rel->r_addend;
7427
7428 if (val >= toc->size)
7429 continue;
7430
7431 /* For the toc section, we only mark as used if
7432 this entry itself isn't unused. */
7433 if (sec == toc
7434 && !used[val >> 3]
7435 && (used[rel->r_offset >> 3]
7436 || !skip[rel->r_offset >> 3]))
7437 /* Do all the relocs again, to catch reference
7438 chains. */
7439 repeat = 1;
7440
7441 used[val >> 3] = 1;
7442 }
7443 while (repeat);
7444 }
7445
7446 /* Merge the used and skip arrays. Assume that TOC
7447 doublewords not appearing as either used or unused belong
7448 to to an entry more than one doubleword in size. */
7449 for (drop = skip, keep = used, last = 0, some_unused = 0;
7450 drop < skip + (toc->size + 7) / 8;
7451 ++drop, ++keep)
7452 {
7453 if (*keep)
7454 {
7455 *drop = 0;
7456 last = 0;
7457 }
7458 else if (*drop)
7459 {
7460 some_unused = 1;
7461 last = 1;
7462 }
7463 else
7464 *drop = last;
7465 }
7466
7467 free (used);
7468
7469 if (some_unused)
7470 {
7471 bfd_byte *contents, *src;
7472 unsigned long off;
7473
7474 /* Shuffle the toc contents, and at the same time convert the
7475 skip array from booleans into offsets. */
7476 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7477 goto error_ret;
7478
7479 elf_section_data (toc)->this_hdr.contents = contents;
7480
7481 for (src = contents, off = 0, drop = skip;
7482 src < contents + toc->size;
7483 src += 8, ++drop)
7484 {
7485 if (*drop)
7486 {
7487 *drop = (unsigned long) -1;
7488 off += 8;
7489 }
7490 else if (off != 0)
7491 {
7492 *drop = off;
7493 memcpy (src - off, src, 8);
7494 }
7495 }
7496 toc->rawsize = toc->size;
7497 toc->size = src - contents - off;
7498
7499 if (toc->reloc_count != 0)
7500 {
7501 Elf_Internal_Rela *wrel;
7502 bfd_size_type sz;
7503
7504 /* Read toc relocs. */
7505 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7506 TRUE);
7507 if (relstart == NULL)
7508 goto error_ret;
7509
7510 /* Remove unused toc relocs, and adjust those we keep. */
7511 wrel = relstart;
7512 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7513 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7514 {
7515 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7516 wrel->r_info = rel->r_info;
7517 wrel->r_addend = rel->r_addend;
7518 ++wrel;
7519 }
7520 else if (!dec_dynrel_count (rel->r_info, toc, info,
7521 &local_syms, NULL, NULL))
7522 goto error_ret;
7523
7524 toc->reloc_count = wrel - relstart;
7525 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7526 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7527 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7528 }
7529
7530 /* Adjust addends for relocs against the toc section sym. */
7531 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7532 {
7533 if (sec->reloc_count == 0
7534 || elf_discarded_section (sec))
7535 continue;
7536
7537 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7538 TRUE);
7539 if (relstart == NULL)
7540 goto error_ret;
7541
7542 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7543 {
7544 enum elf_ppc64_reloc_type r_type;
7545 unsigned long r_symndx;
7546 asection *sym_sec;
7547 struct elf_link_hash_entry *h;
7548 Elf_Internal_Sym *sym;
7549
7550 r_type = ELF64_R_TYPE (rel->r_info);
7551 switch (r_type)
7552 {
7553 default:
7554 continue;
7555
7556 case R_PPC64_TOC16:
7557 case R_PPC64_TOC16_LO:
7558 case R_PPC64_TOC16_HI:
7559 case R_PPC64_TOC16_HA:
7560 case R_PPC64_TOC16_DS:
7561 case R_PPC64_TOC16_LO_DS:
7562 case R_PPC64_ADDR64:
7563 break;
7564 }
7565
7566 r_symndx = ELF64_R_SYM (rel->r_info);
7567 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7568 r_symndx, ibfd))
7569 goto error_ret;
7570
7571 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7572 continue;
7573
7574 rel->r_addend -= skip[rel->r_addend >> 3];
7575 }
7576 }
7577
7578 /* We shouldn't have local or global symbols defined in the TOC,
7579 but handle them anyway. */
7580 if (local_syms != NULL)
7581 {
7582 Elf_Internal_Sym *sym;
7583
7584 for (sym = local_syms;
7585 sym < local_syms + symtab_hdr->sh_info;
7586 ++sym)
7587 if (sym->st_shndx != SHN_UNDEF
7588 && (sym->st_shndx < SHN_LORESERVE
7589 || sym->st_shndx > SHN_HIRESERVE)
7590 && sym->st_value != 0
7591 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7592 {
7593 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7594 sym->st_value -= skip[sym->st_value >> 3];
7595 else
7596 {
7597 (*_bfd_error_handler)
7598 (_("%s defined in removed toc entry"),
7599 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7600 NULL));
7601 sym->st_value = 0;
7602 sym->st_shndx = SHN_ABS;
7603 }
7604 symtab_hdr->contents = (unsigned char *) local_syms;
7605 }
7606 }
7607
7608 /* Finally, adjust any global syms defined in the toc. */
7609 if (toc_inf.global_toc_syms)
7610 {
7611 toc_inf.toc = toc;
7612 toc_inf.skip = skip;
7613 toc_inf.global_toc_syms = FALSE;
7614 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7615 &toc_inf);
7616 }
7617 }
7618
7619 if (local_syms != NULL
7620 && symtab_hdr->contents != (unsigned char *) local_syms)
7621 {
7622 if (!info->keep_memory)
7623 free (local_syms);
7624 else
7625 symtab_hdr->contents = (unsigned char *) local_syms;
7626 }
7627 free (skip);
7628 }
7629
7630 return TRUE;
7631 }
7632
7633 /* Allocate space in .plt, .got and associated reloc sections for
7634 dynamic relocs. */
7635
7636 static bfd_boolean
7637 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7638 {
7639 struct bfd_link_info *info;
7640 struct ppc_link_hash_table *htab;
7641 asection *s;
7642 struct ppc_link_hash_entry *eh;
7643 struct ppc_dyn_relocs *p;
7644 struct got_entry *gent;
7645
7646 if (h->root.type == bfd_link_hash_indirect)
7647 return TRUE;
7648
7649 if (h->root.type == bfd_link_hash_warning)
7650 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7651
7652 info = (struct bfd_link_info *) inf;
7653 htab = ppc_hash_table (info);
7654
7655 if (htab->elf.dynamic_sections_created
7656 && h->dynindx != -1
7657 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7658 {
7659 struct plt_entry *pent;
7660 bfd_boolean doneone = FALSE;
7661 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7662 if (pent->plt.refcount > 0)
7663 {
7664 /* If this is the first .plt entry, make room for the special
7665 first entry. */
7666 s = htab->plt;
7667 if (s->size == 0)
7668 s->size += PLT_INITIAL_ENTRY_SIZE;
7669
7670 pent->plt.offset = s->size;
7671
7672 /* Make room for this entry. */
7673 s->size += PLT_ENTRY_SIZE;
7674
7675 /* Make room for the .glink code. */
7676 s = htab->glink;
7677 if (s->size == 0)
7678 s->size += GLINK_CALL_STUB_SIZE;
7679 /* We need bigger stubs past index 32767. */
7680 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7681 s->size += 4;
7682 s->size += 2*4;
7683
7684 /* We also need to make an entry in the .rela.plt section. */
7685 s = htab->relplt;
7686 s->size += sizeof (Elf64_External_Rela);
7687 doneone = TRUE;
7688 }
7689 else
7690 pent->plt.offset = (bfd_vma) -1;
7691 if (!doneone)
7692 {
7693 h->plt.plist = NULL;
7694 h->needs_plt = 0;
7695 }
7696 }
7697 else
7698 {
7699 h->plt.plist = NULL;
7700 h->needs_plt = 0;
7701 }
7702
7703 eh = (struct ppc_link_hash_entry *) h;
7704 /* Run through the TLS GD got entries first if we're changing them
7705 to TPREL. */
7706 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7707 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7708 if (gent->got.refcount > 0
7709 && (gent->tls_type & TLS_GD) != 0)
7710 {
7711 /* This was a GD entry that has been converted to TPREL. If
7712 there happens to be a TPREL entry we can use that one. */
7713 struct got_entry *ent;
7714 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7715 if (ent->got.refcount > 0
7716 && (ent->tls_type & TLS_TPREL) != 0
7717 && ent->addend == gent->addend
7718 && ent->owner == gent->owner)
7719 {
7720 gent->got.refcount = 0;
7721 break;
7722 }
7723
7724 /* If not, then we'll be using our own TPREL entry. */
7725 if (gent->got.refcount != 0)
7726 gent->tls_type = TLS_TLS | TLS_TPREL;
7727 }
7728
7729 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7730 if (gent->got.refcount > 0)
7731 {
7732 bfd_boolean dyn;
7733
7734 /* Make sure this symbol is output as a dynamic symbol.
7735 Undefined weak syms won't yet be marked as dynamic,
7736 nor will all TLS symbols. */
7737 if (h->dynindx == -1
7738 && !h->forced_local)
7739 {
7740 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7741 return FALSE;
7742 }
7743
7744 if ((gent->tls_type & TLS_LD) != 0
7745 && !h->def_dynamic)
7746 {
7747 ppc64_tlsld_got (gent->owner)->refcount += 1;
7748 gent->got.offset = (bfd_vma) -1;
7749 continue;
7750 }
7751
7752 if (! is_ppc64_elf_target (gent->owner->xvec))
7753 continue;
7754
7755 s = ppc64_elf_tdata (gent->owner)->got;
7756 gent->got.offset = s->size;
7757 s->size
7758 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7759 dyn = htab->elf.dynamic_sections_created;
7760 if ((info->shared
7761 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7762 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7763 || h->root.type != bfd_link_hash_undefweak))
7764 ppc64_elf_tdata (gent->owner)->relgot->size
7765 += (gent->tls_type & eh->tls_mask & TLS_GD
7766 ? 2 * sizeof (Elf64_External_Rela)
7767 : sizeof (Elf64_External_Rela));
7768 }
7769 else
7770 gent->got.offset = (bfd_vma) -1;
7771
7772 if (eh->dyn_relocs == NULL)
7773 return TRUE;
7774
7775 /* In the shared -Bsymbolic case, discard space allocated for
7776 dynamic pc-relative relocs against symbols which turn out to be
7777 defined in regular objects. For the normal shared case, discard
7778 space for relocs that have become local due to symbol visibility
7779 changes. */
7780
7781 if (info->shared)
7782 {
7783 /* Relocs that use pc_count are those that appear on a call insn,
7784 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
7785 generated via assembly. We want calls to protected symbols to
7786 resolve directly to the function rather than going via the plt.
7787 If people want function pointer comparisons to work as expected
7788 then they should avoid writing weird assembly. */
7789 if (SYMBOL_CALLS_LOCAL (info, h))
7790 {
7791 struct ppc_dyn_relocs **pp;
7792
7793 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7794 {
7795 p->count -= p->pc_count;
7796 p->pc_count = 0;
7797 if (p->count == 0)
7798 *pp = p->next;
7799 else
7800 pp = &p->next;
7801 }
7802 }
7803
7804 /* Also discard relocs on undefined weak syms with non-default
7805 visibility. */
7806 if (eh->dyn_relocs != NULL
7807 && h->root.type == bfd_link_hash_undefweak)
7808 {
7809 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7810 eh->dyn_relocs = NULL;
7811
7812 /* Make sure this symbol is output as a dynamic symbol.
7813 Undefined weak syms won't yet be marked as dynamic. */
7814 else if (h->dynindx == -1
7815 && !h->forced_local)
7816 {
7817 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7818 return FALSE;
7819 }
7820 }
7821 }
7822 else if (ELIMINATE_COPY_RELOCS)
7823 {
7824 /* For the non-shared case, discard space for relocs against
7825 symbols which turn out to need copy relocs or are not
7826 dynamic. */
7827
7828 if (!h->non_got_ref
7829 && h->def_dynamic
7830 && !h->def_regular)
7831 {
7832 /* Make sure this symbol is output as a dynamic symbol.
7833 Undefined weak syms won't yet be marked as dynamic. */
7834 if (h->dynindx == -1
7835 && !h->forced_local)
7836 {
7837 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7838 return FALSE;
7839 }
7840
7841 /* If that succeeded, we know we'll be keeping all the
7842 relocs. */
7843 if (h->dynindx != -1)
7844 goto keep;
7845 }
7846
7847 eh->dyn_relocs = NULL;
7848
7849 keep: ;
7850 }
7851
7852 /* Finally, allocate space. */
7853 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7854 {
7855 asection *sreloc = elf_section_data (p->sec)->sreloc;
7856 sreloc->size += p->count * sizeof (Elf64_External_Rela);
7857 }
7858
7859 return TRUE;
7860 }
7861
7862 /* Find any dynamic relocs that apply to read-only sections. */
7863
7864 static bfd_boolean
7865 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7866 {
7867 struct ppc_link_hash_entry *eh;
7868 struct ppc_dyn_relocs *p;
7869
7870 if (h->root.type == bfd_link_hash_warning)
7871 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7872
7873 eh = (struct ppc_link_hash_entry *) h;
7874 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7875 {
7876 asection *s = p->sec->output_section;
7877
7878 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7879 {
7880 struct bfd_link_info *info = inf;
7881
7882 info->flags |= DF_TEXTREL;
7883
7884 /* Not an error, just cut short the traversal. */
7885 return FALSE;
7886 }
7887 }
7888 return TRUE;
7889 }
7890
7891 /* Set the sizes of the dynamic sections. */
7892
7893 static bfd_boolean
7894 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7895 struct bfd_link_info *info)
7896 {
7897 struct ppc_link_hash_table *htab;
7898 bfd *dynobj;
7899 asection *s;
7900 bfd_boolean relocs;
7901 bfd *ibfd;
7902
7903 htab = ppc_hash_table (info);
7904 dynobj = htab->elf.dynobj;
7905 if (dynobj == NULL)
7906 abort ();
7907
7908 if (htab->elf.dynamic_sections_created)
7909 {
7910 /* Set the contents of the .interp section to the interpreter. */
7911 if (info->executable)
7912 {
7913 s = bfd_get_section_by_name (dynobj, ".interp");
7914 if (s == NULL)
7915 abort ();
7916 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7917 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7918 }
7919 }
7920
7921 /* Set up .got offsets for local syms, and space for local dynamic
7922 relocs. */
7923 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7924 {
7925 struct got_entry **lgot_ents;
7926 struct got_entry **end_lgot_ents;
7927 char *lgot_masks;
7928 bfd_size_type locsymcount;
7929 Elf_Internal_Shdr *symtab_hdr;
7930 asection *srel;
7931
7932 if (!is_ppc64_elf_target (ibfd->xvec))
7933 continue;
7934
7935 for (s = ibfd->sections; s != NULL; s = s->next)
7936 {
7937 struct ppc_dyn_relocs *p;
7938
7939 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
7940 {
7941 if (!bfd_is_abs_section (p->sec)
7942 && bfd_is_abs_section (p->sec->output_section))
7943 {
7944 /* Input section has been discarded, either because
7945 it is a copy of a linkonce section or due to
7946 linker script /DISCARD/, so we'll be discarding
7947 the relocs too. */
7948 }
7949 else if (p->count != 0)
7950 {
7951 srel = elf_section_data (p->sec)->sreloc;
7952 srel->size += p->count * sizeof (Elf64_External_Rela);
7953 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7954 info->flags |= DF_TEXTREL;
7955 }
7956 }
7957 }
7958
7959 lgot_ents = elf_local_got_ents (ibfd);
7960 if (!lgot_ents)
7961 continue;
7962
7963 symtab_hdr = &elf_symtab_hdr (ibfd);
7964 locsymcount = symtab_hdr->sh_info;
7965 end_lgot_ents = lgot_ents + locsymcount;
7966 lgot_masks = (char *) end_lgot_ents;
7967 s = ppc64_elf_tdata (ibfd)->got;
7968 srel = ppc64_elf_tdata (ibfd)->relgot;
7969 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
7970 {
7971 struct got_entry *ent;
7972
7973 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
7974 if (ent->got.refcount > 0)
7975 {
7976 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
7977 {
7978 ppc64_tlsld_got (ibfd)->refcount += 1;
7979 ent->got.offset = (bfd_vma) -1;
7980 }
7981 else
7982 {
7983 ent->got.offset = s->size;
7984 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
7985 {
7986 s->size += 16;
7987 if (info->shared)
7988 srel->size += 2 * sizeof (Elf64_External_Rela);
7989 }
7990 else
7991 {
7992 s->size += 8;
7993 if (info->shared)
7994 srel->size += sizeof (Elf64_External_Rela);
7995 }
7996 }
7997 }
7998 else
7999 ent->got.offset = (bfd_vma) -1;
8000 }
8001 }
8002
8003 /* Allocate global sym .plt and .got entries, and space for global
8004 sym dynamic relocs. */
8005 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8006
8007 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8008 {
8009 if (!is_ppc64_elf_target (ibfd->xvec))
8010 continue;
8011
8012 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8013 {
8014 s = ppc64_elf_tdata (ibfd)->got;
8015 ppc64_tlsld_got (ibfd)->offset = s->size;
8016 s->size += 16;
8017 if (info->shared)
8018 {
8019 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8020 srel->size += sizeof (Elf64_External_Rela);
8021 }
8022 }
8023 else
8024 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8025 }
8026
8027 /* We now have determined the sizes of the various dynamic sections.
8028 Allocate memory for them. */
8029 relocs = FALSE;
8030 for (s = dynobj->sections; s != NULL; s = s->next)
8031 {
8032 if ((s->flags & SEC_LINKER_CREATED) == 0)
8033 continue;
8034
8035 if (s == htab->brlt || s == htab->relbrlt)
8036 /* These haven't been allocated yet; don't strip. */
8037 continue;
8038 else if (s == htab->got
8039 || s == htab->plt
8040 || s == htab->glink
8041 || s == htab->dynbss)
8042 {
8043 /* Strip this section if we don't need it; see the
8044 comment below. */
8045 }
8046 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8047 {
8048 if (s->size != 0)
8049 {
8050 if (s != htab->relplt)
8051 relocs = TRUE;
8052
8053 /* We use the reloc_count field as a counter if we need
8054 to copy relocs into the output file. */
8055 s->reloc_count = 0;
8056 }
8057 }
8058 else
8059 {
8060 /* It's not one of our sections, so don't allocate space. */
8061 continue;
8062 }
8063
8064 if (s->size == 0)
8065 {
8066 /* If we don't need this section, strip it from the
8067 output file. This is mostly to handle .rela.bss and
8068 .rela.plt. We must create both sections in
8069 create_dynamic_sections, because they must be created
8070 before the linker maps input sections to output
8071 sections. The linker does that before
8072 adjust_dynamic_symbol is called, and it is that
8073 function which decides whether anything needs to go
8074 into these sections. */
8075 s->flags |= SEC_EXCLUDE;
8076 continue;
8077 }
8078
8079 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8080 continue;
8081
8082 /* Allocate memory for the section contents. We use bfd_zalloc
8083 here in case unused entries are not reclaimed before the
8084 section's contents are written out. This should not happen,
8085 but this way if it does we get a R_PPC64_NONE reloc in .rela
8086 sections instead of garbage.
8087 We also rely on the section contents being zero when writing
8088 the GOT. */
8089 s->contents = bfd_zalloc (dynobj, s->size);
8090 if (s->contents == NULL)
8091 return FALSE;
8092 }
8093
8094 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8095 {
8096 if (!is_ppc64_elf_target (ibfd->xvec))
8097 continue;
8098
8099 s = ppc64_elf_tdata (ibfd)->got;
8100 if (s != NULL && s != htab->got)
8101 {
8102 if (s->size == 0)
8103 s->flags |= SEC_EXCLUDE;
8104 else
8105 {
8106 s->contents = bfd_zalloc (ibfd, s->size);
8107 if (s->contents == NULL)
8108 return FALSE;
8109 }
8110 }
8111 s = ppc64_elf_tdata (ibfd)->relgot;
8112 if (s != NULL)
8113 {
8114 if (s->size == 0)
8115 s->flags |= SEC_EXCLUDE;
8116 else
8117 {
8118 s->contents = bfd_zalloc (ibfd, s->size);
8119 if (s->contents == NULL)
8120 return FALSE;
8121 relocs = TRUE;
8122 s->reloc_count = 0;
8123 }
8124 }
8125 }
8126
8127 if (htab->elf.dynamic_sections_created)
8128 {
8129 /* Add some entries to the .dynamic section. We fill in the
8130 values later, in ppc64_elf_finish_dynamic_sections, but we
8131 must add the entries now so that we get the correct size for
8132 the .dynamic section. The DT_DEBUG entry is filled in by the
8133 dynamic linker and used by the debugger. */
8134 #define add_dynamic_entry(TAG, VAL) \
8135 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8136
8137 if (info->executable)
8138 {
8139 if (!add_dynamic_entry (DT_DEBUG, 0))
8140 return FALSE;
8141 }
8142
8143 if (htab->plt != NULL && htab->plt->size != 0)
8144 {
8145 if (!add_dynamic_entry (DT_PLTGOT, 0)
8146 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8147 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8148 || !add_dynamic_entry (DT_JMPREL, 0)
8149 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8150 return FALSE;
8151 }
8152
8153 if (NO_OPD_RELOCS)
8154 {
8155 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8156 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8157 return FALSE;
8158 }
8159
8160 if (relocs)
8161 {
8162 if (!add_dynamic_entry (DT_RELA, 0)
8163 || !add_dynamic_entry (DT_RELASZ, 0)
8164 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8165 return FALSE;
8166
8167 /* If any dynamic relocs apply to a read-only section,
8168 then we need a DT_TEXTREL entry. */
8169 if ((info->flags & DF_TEXTREL) == 0)
8170 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8171
8172 if ((info->flags & DF_TEXTREL) != 0)
8173 {
8174 if (!add_dynamic_entry (DT_TEXTREL, 0))
8175 return FALSE;
8176 }
8177 }
8178 }
8179 #undef add_dynamic_entry
8180
8181 return TRUE;
8182 }
8183
8184 /* Determine the type of stub needed, if any, for a call. */
8185
8186 static inline enum ppc_stub_type
8187 ppc_type_of_stub (asection *input_sec,
8188 const Elf_Internal_Rela *rel,
8189 struct ppc_link_hash_entry **hash,
8190 bfd_vma destination)
8191 {
8192 struct ppc_link_hash_entry *h = *hash;
8193 bfd_vma location;
8194 bfd_vma branch_offset;
8195 bfd_vma max_branch_offset;
8196 enum elf_ppc64_reloc_type r_type;
8197
8198 if (h != NULL)
8199 {
8200 struct ppc_link_hash_entry *fdh = h;
8201 if (fdh->oh != NULL
8202 && fdh->oh->is_func_descriptor)
8203 fdh = fdh->oh;
8204
8205 if (fdh->elf.dynindx != -1)
8206 {
8207 struct plt_entry *ent;
8208
8209 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8210 if (ent->addend == rel->r_addend
8211 && ent->plt.offset != (bfd_vma) -1)
8212 {
8213 *hash = fdh;
8214 return ppc_stub_plt_call;
8215 }
8216 }
8217
8218 /* Here, we know we don't have a plt entry. If we don't have a
8219 either a defined function descriptor or a defined entry symbol
8220 in a regular object file, then it is pointless trying to make
8221 any other type of stub. */
8222 if (!((fdh->elf.root.type == bfd_link_hash_defined
8223 || fdh->elf.root.type == bfd_link_hash_defweak)
8224 && fdh->elf.root.u.def.section->output_section != NULL)
8225 && !((h->elf.root.type == bfd_link_hash_defined
8226 || h->elf.root.type == bfd_link_hash_defweak)
8227 && h->elf.root.u.def.section->output_section != NULL))
8228 return ppc_stub_none;
8229 }
8230
8231 /* Determine where the call point is. */
8232 location = (input_sec->output_offset
8233 + input_sec->output_section->vma
8234 + rel->r_offset);
8235
8236 branch_offset = destination - location;
8237 r_type = ELF64_R_TYPE (rel->r_info);
8238
8239 /* Determine if a long branch stub is needed. */
8240 max_branch_offset = 1 << 25;
8241 if (r_type != R_PPC64_REL24)
8242 max_branch_offset = 1 << 15;
8243
8244 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8245 /* We need a stub. Figure out whether a long_branch or plt_branch
8246 is needed later. */
8247 return ppc_stub_long_branch;
8248
8249 return ppc_stub_none;
8250 }
8251
8252 /* Build a .plt call stub. */
8253
8254 static inline bfd_byte *
8255 build_plt_stub (bfd *obfd, bfd_byte *p, int offset)
8256 {
8257 #define PPC_LO(v) ((v) & 0xffff)
8258 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8259 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8260
8261 if (PPC_HA (offset) != 0)
8262 {
8263 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8264 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8265 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8266 if (PPC_HA (offset + 16) != PPC_HA (offset))
8267 {
8268 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8269 offset = 0;
8270 }
8271 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8272 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8273 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8274 bfd_put_32 (obfd, BCTR, p), p += 4;
8275 }
8276 else
8277 {
8278 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8279 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8280 if (PPC_HA (offset + 16) != PPC_HA (offset))
8281 {
8282 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8283 offset = 0;
8284 }
8285 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8286 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8287 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8288 bfd_put_32 (obfd, BCTR, p), p += 4;
8289 }
8290 return p;
8291 }
8292
8293 static bfd_boolean
8294 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8295 {
8296 struct ppc_stub_hash_entry *stub_entry;
8297 struct ppc_branch_hash_entry *br_entry;
8298 struct bfd_link_info *info;
8299 struct ppc_link_hash_table *htab;
8300 bfd_byte *loc;
8301 bfd_byte *p;
8302 unsigned int indx;
8303 struct plt_entry *ent;
8304 bfd_vma dest, off;
8305 int size;
8306
8307 /* Massage our args to the form they really have. */
8308 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8309 info = in_arg;
8310
8311 htab = ppc_hash_table (info);
8312
8313 /* Make a note of the offset within the stubs for this entry. */
8314 stub_entry->stub_offset = stub_entry->stub_sec->size;
8315 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8316
8317 htab->stub_count[stub_entry->stub_type - 1] += 1;
8318 switch (stub_entry->stub_type)
8319 {
8320 case ppc_stub_long_branch:
8321 case ppc_stub_long_branch_r2off:
8322 /* Branches are relative. This is where we are going to. */
8323 off = dest = (stub_entry->target_value
8324 + stub_entry->target_section->output_offset
8325 + stub_entry->target_section->output_section->vma);
8326
8327 /* And this is where we are coming from. */
8328 off -= (stub_entry->stub_offset
8329 + stub_entry->stub_sec->output_offset
8330 + stub_entry->stub_sec->output_section->vma);
8331
8332 size = 4;
8333 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8334 {
8335 bfd_vma r2off;
8336
8337 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8338 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8339 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8340 loc += 4;
8341 size = 12;
8342 if (PPC_HA (r2off) != 0)
8343 {
8344 size = 16;
8345 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8346 loc += 4;
8347 }
8348 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8349 loc += 4;
8350 off -= size - 4;
8351 }
8352 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8353
8354 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8355 {
8356 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8357 stub_entry->root.string);
8358 htab->stub_error = TRUE;
8359 return FALSE;
8360 }
8361
8362 if (info->emitrelocations)
8363 {
8364 Elf_Internal_Rela *relocs, *r;
8365 struct bfd_elf_section_data *elfsec_data;
8366
8367 elfsec_data = elf_section_data (stub_entry->stub_sec);
8368 relocs = elfsec_data->relocs;
8369 if (relocs == NULL)
8370 {
8371 bfd_size_type relsize;
8372 relsize = stub_entry->stub_sec->reloc_count * sizeof (*relocs);
8373 relocs = bfd_alloc (htab->stub_bfd, relsize);
8374 if (relocs == NULL)
8375 return FALSE;
8376 elfsec_data->relocs = relocs;
8377 elfsec_data->rel_hdr.sh_size = (stub_entry->stub_sec->reloc_count
8378 * sizeof (Elf64_External_Rela));
8379 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8380 stub_entry->stub_sec->reloc_count = 0;
8381 }
8382 r = relocs + stub_entry->stub_sec->reloc_count;
8383 stub_entry->stub_sec->reloc_count += 1;
8384 r->r_offset = loc - stub_entry->stub_sec->contents;
8385 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8386 r->r_addend = dest;
8387 if (stub_entry->h != NULL)
8388 {
8389 struct elf_link_hash_entry **hashes;
8390 unsigned long symndx;
8391 struct ppc_link_hash_entry *h;
8392
8393 hashes = elf_sym_hashes (htab->stub_bfd);
8394 if (hashes == NULL)
8395 {
8396 bfd_size_type hsize;
8397
8398 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8399 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8400 if (hashes == NULL)
8401 return FALSE;
8402 elf_sym_hashes (htab->stub_bfd) = hashes;
8403 htab->stub_globals = 1;
8404 }
8405 symndx = htab->stub_globals++;
8406 h = stub_entry->h;
8407 hashes[symndx] = &h->elf;
8408 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8409 if (h->oh != NULL && h->oh->is_func)
8410 h = h->oh;
8411 if (h->elf.root.u.def.section != stub_entry->target_section)
8412 /* H is an opd symbol. The addend must be zero. */
8413 r->r_addend = 0;
8414 else
8415 {
8416 off = (h->elf.root.u.def.value
8417 + h->elf.root.u.def.section->output_offset
8418 + h->elf.root.u.def.section->output_section->vma);
8419 r->r_addend -= off;
8420 }
8421 }
8422 }
8423 break;
8424
8425 case ppc_stub_plt_branch:
8426 case ppc_stub_plt_branch_r2off:
8427 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8428 stub_entry->root.string + 9,
8429 FALSE, FALSE);
8430 if (br_entry == NULL)
8431 {
8432 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8433 stub_entry->root.string);
8434 htab->stub_error = TRUE;
8435 return FALSE;
8436 }
8437
8438 off = (stub_entry->target_value
8439 + stub_entry->target_section->output_offset
8440 + stub_entry->target_section->output_section->vma);
8441
8442 bfd_put_64 (htab->brlt->owner, off,
8443 htab->brlt->contents + br_entry->offset);
8444
8445 if (br_entry->iter == htab->stub_iteration)
8446 {
8447 br_entry->iter = 0;
8448
8449 if (htab->relbrlt != NULL)
8450 {
8451 /* Create a reloc for the branch lookup table entry. */
8452 Elf_Internal_Rela rela;
8453 bfd_byte *rl;
8454
8455 rela.r_offset = (br_entry->offset
8456 + htab->brlt->output_offset
8457 + htab->brlt->output_section->vma);
8458 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8459 rela.r_addend = off;
8460
8461 rl = htab->relbrlt->contents;
8462 rl += (htab->relbrlt->reloc_count++
8463 * sizeof (Elf64_External_Rela));
8464 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8465 }
8466 else if (info->emitrelocations)
8467 {
8468 Elf_Internal_Rela *relocs, *r;
8469 struct bfd_elf_section_data *elfsec_data;
8470
8471 elfsec_data = elf_section_data (htab->brlt);
8472 relocs = elfsec_data->relocs;
8473 if (relocs == NULL)
8474 {
8475 bfd_size_type relsize;
8476 relsize = htab->brlt->reloc_count * sizeof (*relocs);
8477 relocs = bfd_alloc (htab->brlt->owner, relsize);
8478 if (relocs == NULL)
8479 return FALSE;
8480 elfsec_data->relocs = relocs;
8481 elfsec_data->rel_hdr.sh_size
8482 = (stub_entry->stub_sec->reloc_count
8483 * sizeof (Elf64_External_Rela));
8484 elfsec_data->rel_hdr.sh_entsize
8485 = sizeof (Elf64_External_Rela);
8486 htab->brlt->reloc_count = 0;
8487 }
8488 r = relocs + htab->brlt->reloc_count;
8489 htab->brlt->reloc_count += 1;
8490 r->r_offset = (br_entry->offset
8491 + htab->brlt->output_offset
8492 + htab->brlt->output_section->vma);
8493 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8494 r->r_addend = off;
8495 }
8496 }
8497
8498 off = (br_entry->offset
8499 + htab->brlt->output_offset
8500 + htab->brlt->output_section->vma
8501 - elf_gp (htab->brlt->output_section->owner)
8502 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8503
8504 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8505 {
8506 (*_bfd_error_handler)
8507 (_("linkage table error against `%s'"),
8508 stub_entry->root.string);
8509 bfd_set_error (bfd_error_bad_value);
8510 htab->stub_error = TRUE;
8511 return FALSE;
8512 }
8513
8514 indx = off;
8515 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8516 {
8517 if (PPC_HA (indx) != 0)
8518 {
8519 size = 16;
8520 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8521 loc += 4;
8522 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8523 }
8524 else
8525 {
8526 size = 12;
8527 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8528 }
8529 }
8530 else
8531 {
8532 bfd_vma r2off;
8533
8534 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8535 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8536 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8537 loc += 4;
8538 size = 20;
8539 if (PPC_HA (indx) != 0)
8540 {
8541 size += 4;
8542 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc);
8543 loc += 4;
8544 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc);
8545 loc += 4;
8546 }
8547 else
8548 {
8549 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (indx), loc);
8550 loc += 4;
8551 }
8552
8553 if (PPC_HA (r2off) != 0)
8554 {
8555 size += 4;
8556 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8557 loc += 4;
8558 }
8559 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8560 }
8561 loc += 4;
8562 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8563 loc += 4;
8564 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8565 break;
8566
8567 case ppc_stub_plt_call:
8568 /* Do the best we can for shared libraries built without
8569 exporting ".foo" for each "foo". This can happen when symbol
8570 versioning scripts strip all bar a subset of symbols. */
8571 if (stub_entry->h->oh != NULL
8572 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8573 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8574 {
8575 /* Point the symbol at the stub. There may be multiple stubs,
8576 we don't really care; The main thing is to make this sym
8577 defined somewhere. Maybe defining the symbol in the stub
8578 section is a silly idea. If we didn't do this, htab->top_id
8579 could disappear. */
8580 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8581 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8582 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8583 }
8584
8585 /* Now build the stub. */
8586 off = (bfd_vma) -1;
8587 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8588 if (ent->addend == stub_entry->addend)
8589 {
8590 off = ent->plt.offset;
8591 break;
8592 }
8593 if (off >= (bfd_vma) -2)
8594 abort ();
8595
8596 off &= ~ (bfd_vma) 1;
8597 off += (htab->plt->output_offset
8598 + htab->plt->output_section->vma
8599 - elf_gp (htab->plt->output_section->owner)
8600 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8601
8602 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8603 {
8604 (*_bfd_error_handler)
8605 (_("linkage table error against `%s'"),
8606 stub_entry->h->elf.root.root.string);
8607 bfd_set_error (bfd_error_bad_value);
8608 htab->stub_error = TRUE;
8609 return FALSE;
8610 }
8611
8612 p = build_plt_stub (htab->stub_bfd, loc, off);
8613 size = p - loc;
8614 break;
8615
8616 default:
8617 BFD_FAIL ();
8618 return FALSE;
8619 }
8620
8621 stub_entry->stub_sec->size += size;
8622
8623 if (htab->emit_stub_syms)
8624 {
8625 struct elf_link_hash_entry *h;
8626 size_t len1, len2;
8627 char *name;
8628 const char *const stub_str[] = { "long_branch",
8629 "long_branch_r2off",
8630 "plt_branch",
8631 "plt_branch_r2off",
8632 "plt_call" };
8633
8634 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8635 len2 = strlen (stub_entry->root.string);
8636 name = bfd_malloc (len1 + len2 + 2);
8637 if (name == NULL)
8638 return FALSE;
8639 memcpy (name, stub_entry->root.string, 9);
8640 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8641 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8642 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8643 if (h == NULL)
8644 return FALSE;
8645 if (h->root.type == bfd_link_hash_new)
8646 {
8647 h->root.type = bfd_link_hash_defined;
8648 h->root.u.def.section = stub_entry->stub_sec;
8649 h->root.u.def.value = stub_entry->stub_offset;
8650 h->ref_regular = 1;
8651 h->def_regular = 1;
8652 h->ref_regular_nonweak = 1;
8653 h->forced_local = 1;
8654 h->non_elf = 0;
8655 }
8656 }
8657
8658 return TRUE;
8659 }
8660
8661 /* As above, but don't actually build the stub. Just bump offset so
8662 we know stub section sizes, and select plt_branch stubs where
8663 long_branch stubs won't do. */
8664
8665 static bfd_boolean
8666 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8667 {
8668 struct ppc_stub_hash_entry *stub_entry;
8669 struct bfd_link_info *info;
8670 struct ppc_link_hash_table *htab;
8671 bfd_vma off;
8672 int size;
8673
8674 /* Massage our args to the form they really have. */
8675 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8676 info = in_arg;
8677
8678 htab = ppc_hash_table (info);
8679
8680 if (stub_entry->stub_type == ppc_stub_plt_call)
8681 {
8682 struct plt_entry *ent;
8683 off = (bfd_vma) -1;
8684 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8685 if (ent->addend == stub_entry->addend)
8686 {
8687 off = ent->plt.offset & ~(bfd_vma) 1;
8688 break;
8689 }
8690 if (off >= (bfd_vma) -2)
8691 abort ();
8692 off += (htab->plt->output_offset
8693 + htab->plt->output_section->vma
8694 - elf_gp (htab->plt->output_section->owner)
8695 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8696
8697 size = PLT_CALL_STUB_SIZE;
8698 if (PPC_HA (off) == 0)
8699 size -= 4;
8700 if (PPC_HA (off + 16) != PPC_HA (off))
8701 size += 4;
8702 }
8703 else
8704 {
8705 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8706 variants. */
8707 bfd_vma r2off = 0;
8708
8709 off = (stub_entry->target_value
8710 + stub_entry->target_section->output_offset
8711 + stub_entry->target_section->output_section->vma);
8712 off -= (stub_entry->stub_sec->size
8713 + stub_entry->stub_sec->output_offset
8714 + stub_entry->stub_sec->output_section->vma);
8715
8716 /* Reset the stub type from the plt variant in case we now
8717 can reach with a shorter stub. */
8718 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8719 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8720
8721 size = 4;
8722 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8723 {
8724 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8725 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8726 size = 12;
8727 if (PPC_HA (r2off) != 0)
8728 size = 16;
8729 off -= size - 4;
8730 }
8731
8732 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8733 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8734 {
8735 struct ppc_branch_hash_entry *br_entry;
8736 unsigned int indx;
8737
8738 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8739 stub_entry->root.string + 9,
8740 TRUE, FALSE);
8741 if (br_entry == NULL)
8742 {
8743 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8744 stub_entry->root.string);
8745 htab->stub_error = TRUE;
8746 return FALSE;
8747 }
8748
8749 if (br_entry->iter != htab->stub_iteration)
8750 {
8751 br_entry->iter = htab->stub_iteration;
8752 br_entry->offset = htab->brlt->size;
8753 htab->brlt->size += 8;
8754
8755 if (htab->relbrlt != NULL)
8756 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8757 else if (info->emitrelocations)
8758 {
8759 htab->brlt->reloc_count += 1;
8760 htab->brlt->flags |= SEC_RELOC;
8761 }
8762 }
8763
8764 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8765 off = (br_entry->offset
8766 + htab->brlt->output_offset
8767 + htab->brlt->output_section->vma
8768 - elf_gp (htab->brlt->output_section->owner)
8769 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8770
8771 indx = off;
8772 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8773 {
8774 size = 12;
8775 if (PPC_HA (indx) != 0)
8776 size = 16;
8777 }
8778 else
8779 {
8780 size = 20;
8781 if (PPC_HA (indx) != 0)
8782 size += 4;
8783
8784 if (PPC_HA (r2off) != 0)
8785 size += 4;
8786 }
8787 }
8788 else if (info->emitrelocations)
8789 {
8790 stub_entry->stub_sec->reloc_count += 1;
8791 stub_entry->stub_sec->flags |= SEC_RELOC;
8792 }
8793 }
8794
8795 stub_entry->stub_sec->size += size;
8796 return TRUE;
8797 }
8798
8799 /* Set up various things so that we can make a list of input sections
8800 for each output section included in the link. Returns -1 on error,
8801 0 when no stubs will be needed, and 1 on success. */
8802
8803 int
8804 ppc64_elf_setup_section_lists (bfd *output_bfd,
8805 struct bfd_link_info *info,
8806 int no_multi_toc)
8807 {
8808 bfd *input_bfd;
8809 int top_id, top_index, id;
8810 asection *section;
8811 asection **input_list;
8812 bfd_size_type amt;
8813 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8814
8815 htab->no_multi_toc = no_multi_toc;
8816
8817 if (htab->brlt == NULL)
8818 return 0;
8819
8820 /* Find the top input section id. */
8821 for (input_bfd = info->input_bfds, top_id = 3;
8822 input_bfd != NULL;
8823 input_bfd = input_bfd->link_next)
8824 {
8825 for (section = input_bfd->sections;
8826 section != NULL;
8827 section = section->next)
8828 {
8829 if (top_id < section->id)
8830 top_id = section->id;
8831 }
8832 }
8833
8834 htab->top_id = top_id;
8835 amt = sizeof (struct map_stub) * (top_id + 1);
8836 htab->stub_group = bfd_zmalloc (amt);
8837 if (htab->stub_group == NULL)
8838 return -1;
8839
8840 /* Set toc_off for com, und, abs and ind sections. */
8841 for (id = 0; id < 3; id++)
8842 htab->stub_group[id].toc_off = TOC_BASE_OFF;
8843
8844 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
8845
8846 /* We can't use output_bfd->section_count here to find the top output
8847 section index as some sections may have been removed, and
8848 strip_excluded_output_sections doesn't renumber the indices. */
8849 for (section = output_bfd->sections, top_index = 0;
8850 section != NULL;
8851 section = section->next)
8852 {
8853 if (top_index < section->index)
8854 top_index = section->index;
8855 }
8856
8857 htab->top_index = top_index;
8858 amt = sizeof (asection *) * (top_index + 1);
8859 input_list = bfd_zmalloc (amt);
8860 htab->input_list = input_list;
8861 if (input_list == NULL)
8862 return -1;
8863
8864 return 1;
8865 }
8866
8867 /* The linker repeatedly calls this function for each TOC input section
8868 and linker generated GOT section. Group input bfds such that the toc
8869 within a group is less than 64k in size. Will break with cute linker
8870 scripts that play games with dot in the output toc section. */
8871
8872 void
8873 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
8874 {
8875 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8876
8877 if (!htab->no_multi_toc)
8878 {
8879 bfd_vma addr = isec->output_offset + isec->output_section->vma;
8880 bfd_vma off = addr - htab->toc_curr;
8881
8882 if (off + isec->size > 0x10000)
8883 htab->toc_curr = addr;
8884
8885 elf_gp (isec->owner) = (htab->toc_curr
8886 - elf_gp (isec->output_section->owner)
8887 + TOC_BASE_OFF);
8888 }
8889 }
8890
8891 /* Called after the last call to the above function. */
8892
8893 void
8894 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
8895 {
8896 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8897
8898 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
8899
8900 /* toc_curr tracks the TOC offset used for code sections below in
8901 ppc64_elf_next_input_section. Start off at 0x8000. */
8902 htab->toc_curr = TOC_BASE_OFF;
8903 }
8904
8905 /* No toc references were found in ISEC. If the code in ISEC makes no
8906 calls, then there's no need to use toc adjusting stubs when branching
8907 into ISEC. Actually, indirect calls from ISEC are OK as they will
8908 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
8909 needed, and 2 if a cyclical call-graph was found but no other reason
8910 for a stub was detected. If called from the top level, a return of
8911 2 means the same as a return of 0. */
8912
8913 static int
8914 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
8915 {
8916 Elf_Internal_Rela *relstart, *rel;
8917 Elf_Internal_Sym *local_syms;
8918 int ret;
8919 struct ppc_link_hash_table *htab;
8920
8921 /* We know none of our code bearing sections will need toc stubs. */
8922 if ((isec->flags & SEC_LINKER_CREATED) != 0)
8923 return 0;
8924
8925 if (isec->size == 0)
8926 return 0;
8927
8928 if (isec->output_section == NULL)
8929 return 0;
8930
8931 if (isec->reloc_count == 0)
8932 return 0;
8933
8934 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
8935 info->keep_memory);
8936 if (relstart == NULL)
8937 return -1;
8938
8939 /* Look for branches to outside of this section. */
8940 local_syms = NULL;
8941 ret = 0;
8942 htab = ppc_hash_table (info);
8943 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
8944 {
8945 enum elf_ppc64_reloc_type r_type;
8946 unsigned long r_symndx;
8947 struct elf_link_hash_entry *h;
8948 Elf_Internal_Sym *sym;
8949 asection *sym_sec;
8950 struct _opd_sec_data *opd;
8951 bfd_vma sym_value;
8952 bfd_vma dest;
8953
8954 r_type = ELF64_R_TYPE (rel->r_info);
8955 if (r_type != R_PPC64_REL24
8956 && r_type != R_PPC64_REL14
8957 && r_type != R_PPC64_REL14_BRTAKEN
8958 && r_type != R_PPC64_REL14_BRNTAKEN)
8959 continue;
8960
8961 r_symndx = ELF64_R_SYM (rel->r_info);
8962 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
8963 isec->owner))
8964 {
8965 ret = -1;
8966 break;
8967 }
8968
8969 /* Calls to dynamic lib functions go through a plt call stub
8970 that uses r2. Branches to undefined symbols might be a call
8971 using old-style dot symbols that can be satisfied by a plt
8972 call into a new-style dynamic library. */
8973 if (sym_sec == NULL)
8974 {
8975 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8976 if (eh != NULL
8977 && eh->oh != NULL
8978 && eh->oh->elf.plt.plist != NULL)
8979 {
8980 ret = 1;
8981 break;
8982 }
8983
8984 /* Ignore other undefined symbols. */
8985 continue;
8986 }
8987
8988 /* Assume branches to other sections not included in the link need
8989 stubs too, to cover -R and absolute syms. */
8990 if (sym_sec->output_section == NULL)
8991 {
8992 ret = 1;
8993 break;
8994 }
8995
8996 if (h == NULL)
8997 sym_value = sym->st_value;
8998 else
8999 {
9000 if (h->root.type != bfd_link_hash_defined
9001 && h->root.type != bfd_link_hash_defweak)
9002 abort ();
9003 sym_value = h->root.u.def.value;
9004 }
9005 sym_value += rel->r_addend;
9006
9007 /* If this branch reloc uses an opd sym, find the code section. */
9008 opd = get_opd_info (sym_sec);
9009 if (opd != NULL)
9010 {
9011 if (h == NULL && opd->adjust != NULL)
9012 {
9013 long adjust;
9014
9015 adjust = opd->adjust[sym->st_value / 8];
9016 if (adjust == -1)
9017 /* Assume deleted functions won't ever be called. */
9018 continue;
9019 sym_value += adjust;
9020 }
9021
9022 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9023 if (dest == (bfd_vma) -1)
9024 continue;
9025 }
9026 else
9027 dest = (sym_value
9028 + sym_sec->output_offset
9029 + sym_sec->output_section->vma);
9030
9031 /* Ignore branch to self. */
9032 if (sym_sec == isec)
9033 continue;
9034
9035 /* If the called function uses the toc, we need a stub. */
9036 if (sym_sec->has_toc_reloc
9037 || sym_sec->makes_toc_func_call)
9038 {
9039 ret = 1;
9040 break;
9041 }
9042
9043 /* Assume any branch that needs a long branch stub might in fact
9044 need a plt_branch stub. A plt_branch stub uses r2. */
9045 else if (dest - (isec->output_offset
9046 + isec->output_section->vma
9047 + rel->r_offset) + (1 << 25) >= (2 << 25))
9048 {
9049 ret = 1;
9050 break;
9051 }
9052
9053 /* If calling back to a section in the process of being tested, we
9054 can't say for sure that no toc adjusting stubs are needed, so
9055 don't return zero. */
9056 else if (sym_sec->call_check_in_progress)
9057 ret = 2;
9058
9059 /* Branches to another section that itself doesn't have any TOC
9060 references are OK. Recursively call ourselves to check. */
9061 else if (sym_sec->id <= htab->top_id
9062 && htab->stub_group[sym_sec->id].toc_off == 0)
9063 {
9064 int recur;
9065
9066 /* Mark current section as indeterminate, so that other
9067 sections that call back to current won't be marked as
9068 known. */
9069 isec->call_check_in_progress = 1;
9070 recur = toc_adjusting_stub_needed (info, sym_sec);
9071 isec->call_check_in_progress = 0;
9072
9073 if (recur < 0)
9074 {
9075 /* An error. Exit. */
9076 ret = -1;
9077 break;
9078 }
9079 else if (recur <= 1)
9080 {
9081 /* Known result. Mark as checked and set section flag. */
9082 htab->stub_group[sym_sec->id].toc_off = 1;
9083 if (recur != 0)
9084 {
9085 sym_sec->makes_toc_func_call = 1;
9086 ret = 1;
9087 break;
9088 }
9089 }
9090 else
9091 {
9092 /* Unknown result. Continue checking. */
9093 ret = 2;
9094 }
9095 }
9096 }
9097
9098 if (local_syms != NULL
9099 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9100 free (local_syms);
9101 if (elf_section_data (isec)->relocs != relstart)
9102 free (relstart);
9103
9104 return ret;
9105 }
9106
9107 /* The linker repeatedly calls this function for each input section,
9108 in the order that input sections are linked into output sections.
9109 Build lists of input sections to determine groupings between which
9110 we may insert linker stubs. */
9111
9112 bfd_boolean
9113 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9114 {
9115 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9116
9117 if ((isec->output_section->flags & SEC_CODE) != 0
9118 && isec->output_section->index <= htab->top_index)
9119 {
9120 asection **list = htab->input_list + isec->output_section->index;
9121 /* Steal the link_sec pointer for our list. */
9122 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9123 /* This happens to make the list in reverse order,
9124 which is what we want. */
9125 PREV_SEC (isec) = *list;
9126 *list = isec;
9127 }
9128
9129 if (htab->multi_toc_needed)
9130 {
9131 /* If a code section has a function that uses the TOC then we need
9132 to use the right TOC (obviously). Also, make sure that .opd gets
9133 the correct TOC value for R_PPC64_TOC relocs that don't have or
9134 can't find their function symbol (shouldn't ever happen now).
9135 Also specially treat .fixup for the linux kernel. .fixup
9136 contains branches, but only back to the function that hit an
9137 exception. */
9138 if (isec->has_toc_reloc
9139 || (isec->flags & SEC_CODE) == 0
9140 || strcmp (isec->name, ".fixup") == 0)
9141 {
9142 if (elf_gp (isec->owner) != 0)
9143 htab->toc_curr = elf_gp (isec->owner);
9144 }
9145 else if (htab->stub_group[isec->id].toc_off == 0)
9146 {
9147 int ret = toc_adjusting_stub_needed (info, isec);
9148 if (ret < 0)
9149 return FALSE;
9150 else
9151 isec->makes_toc_func_call = ret & 1;
9152 }
9153 }
9154
9155 /* Functions that don't use the TOC can belong in any TOC group.
9156 Use the last TOC base. This happens to make _init and _fini
9157 pasting work. */
9158 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9159 return TRUE;
9160 }
9161
9162 /* See whether we can group stub sections together. Grouping stub
9163 sections may result in fewer stubs. More importantly, we need to
9164 put all .init* and .fini* stubs at the beginning of the .init or
9165 .fini output sections respectively, because glibc splits the
9166 _init and _fini functions into multiple parts. Putting a stub in
9167 the middle of a function is not a good idea. */
9168
9169 static void
9170 group_sections (struct ppc_link_hash_table *htab,
9171 bfd_size_type stub_group_size,
9172 bfd_boolean stubs_always_before_branch)
9173 {
9174 asection **list;
9175 bfd_size_type stub14_group_size;
9176 bfd_boolean suppress_size_errors;
9177
9178 suppress_size_errors = FALSE;
9179 stub14_group_size = stub_group_size;
9180 if (stub_group_size == 1)
9181 {
9182 /* Default values. */
9183 if (stubs_always_before_branch)
9184 {
9185 stub_group_size = 0x1e00000;
9186 stub14_group_size = 0x7800;
9187 }
9188 else
9189 {
9190 stub_group_size = 0x1c00000;
9191 stub14_group_size = 0x7000;
9192 }
9193 suppress_size_errors = TRUE;
9194 }
9195
9196 list = htab->input_list + htab->top_index;
9197 do
9198 {
9199 asection *tail = *list;
9200 while (tail != NULL)
9201 {
9202 asection *curr;
9203 asection *prev;
9204 bfd_size_type total;
9205 bfd_boolean big_sec;
9206 bfd_vma curr_toc;
9207
9208 curr = tail;
9209 total = tail->size;
9210 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9211 ? stub14_group_size : stub_group_size);
9212 if (big_sec && !suppress_size_errors)
9213 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9214 tail->owner, tail);
9215 curr_toc = htab->stub_group[tail->id].toc_off;
9216
9217 while ((prev = PREV_SEC (curr)) != NULL
9218 && ((total += curr->output_offset - prev->output_offset)
9219 < (ppc64_elf_section_data (prev)->has_14bit_branch
9220 ? stub14_group_size : stub_group_size))
9221 && htab->stub_group[prev->id].toc_off == curr_toc)
9222 curr = prev;
9223
9224 /* OK, the size from the start of CURR to the end is less
9225 than stub_group_size and thus can be handled by one stub
9226 section. (or the tail section is itself larger than
9227 stub_group_size, in which case we may be toast.) We
9228 should really be keeping track of the total size of stubs
9229 added here, as stubs contribute to the final output
9230 section size. That's a little tricky, and this way will
9231 only break if stubs added make the total size more than
9232 2^25, ie. for the default stub_group_size, if stubs total
9233 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9234 do
9235 {
9236 prev = PREV_SEC (tail);
9237 /* Set up this stub group. */
9238 htab->stub_group[tail->id].link_sec = curr;
9239 }
9240 while (tail != curr && (tail = prev) != NULL);
9241
9242 /* But wait, there's more! Input sections up to stub_group_size
9243 bytes before the stub section can be handled by it too.
9244 Don't do this if we have a really large section after the
9245 stubs, as adding more stubs increases the chance that
9246 branches may not reach into the stub section. */
9247 if (!stubs_always_before_branch && !big_sec)
9248 {
9249 total = 0;
9250 while (prev != NULL
9251 && ((total += tail->output_offset - prev->output_offset)
9252 < (ppc64_elf_section_data (prev)->has_14bit_branch
9253 ? stub14_group_size : stub_group_size))
9254 && htab->stub_group[prev->id].toc_off == curr_toc)
9255 {
9256 tail = prev;
9257 prev = PREV_SEC (tail);
9258 htab->stub_group[tail->id].link_sec = curr;
9259 }
9260 }
9261 tail = prev;
9262 }
9263 }
9264 while (list-- != htab->input_list);
9265 free (htab->input_list);
9266 #undef PREV_SEC
9267 }
9268
9269 /* Determine and set the size of the stub section for a final link.
9270
9271 The basic idea here is to examine all the relocations looking for
9272 PC-relative calls to a target that is unreachable with a "bl"
9273 instruction. */
9274
9275 bfd_boolean
9276 ppc64_elf_size_stubs (bfd *output_bfd,
9277 struct bfd_link_info *info,
9278 bfd_signed_vma group_size,
9279 asection *(*add_stub_section) (const char *, asection *),
9280 void (*layout_sections_again) (void))
9281 {
9282 bfd_size_type stub_group_size;
9283 bfd_boolean stubs_always_before_branch;
9284 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9285
9286 /* Stash our params away. */
9287 htab->add_stub_section = add_stub_section;
9288 htab->layout_sections_again = layout_sections_again;
9289 stubs_always_before_branch = group_size < 0;
9290 if (group_size < 0)
9291 stub_group_size = -group_size;
9292 else
9293 stub_group_size = group_size;
9294
9295 group_sections (htab, stub_group_size, stubs_always_before_branch);
9296
9297 while (1)
9298 {
9299 bfd *input_bfd;
9300 unsigned int bfd_indx;
9301 asection *stub_sec;
9302
9303 htab->stub_iteration += 1;
9304
9305 for (input_bfd = info->input_bfds, bfd_indx = 0;
9306 input_bfd != NULL;
9307 input_bfd = input_bfd->link_next, bfd_indx++)
9308 {
9309 Elf_Internal_Shdr *symtab_hdr;
9310 asection *section;
9311 Elf_Internal_Sym *local_syms = NULL;
9312
9313 if (!is_ppc64_elf_target (input_bfd->xvec))
9314 continue;
9315
9316 /* We'll need the symbol table in a second. */
9317 symtab_hdr = &elf_symtab_hdr (input_bfd);
9318 if (symtab_hdr->sh_info == 0)
9319 continue;
9320
9321 /* Walk over each section attached to the input bfd. */
9322 for (section = input_bfd->sections;
9323 section != NULL;
9324 section = section->next)
9325 {
9326 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9327
9328 /* If there aren't any relocs, then there's nothing more
9329 to do. */
9330 if ((section->flags & SEC_RELOC) == 0
9331 || (section->flags & SEC_ALLOC) == 0
9332 || (section->flags & SEC_LOAD) == 0
9333 || (section->flags & SEC_CODE) == 0
9334 || section->reloc_count == 0)
9335 continue;
9336
9337 /* If this section is a link-once section that will be
9338 discarded, then don't create any stubs. */
9339 if (section->output_section == NULL
9340 || section->output_section->owner != output_bfd)
9341 continue;
9342
9343 /* Get the relocs. */
9344 internal_relocs
9345 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9346 info->keep_memory);
9347 if (internal_relocs == NULL)
9348 goto error_ret_free_local;
9349
9350 /* Now examine each relocation. */
9351 irela = internal_relocs;
9352 irelaend = irela + section->reloc_count;
9353 for (; irela < irelaend; irela++)
9354 {
9355 enum elf_ppc64_reloc_type r_type;
9356 unsigned int r_indx;
9357 enum ppc_stub_type stub_type;
9358 struct ppc_stub_hash_entry *stub_entry;
9359 asection *sym_sec, *code_sec;
9360 bfd_vma sym_value;
9361 bfd_vma destination;
9362 bfd_boolean ok_dest;
9363 struct ppc_link_hash_entry *hash;
9364 struct ppc_link_hash_entry *fdh;
9365 struct elf_link_hash_entry *h;
9366 Elf_Internal_Sym *sym;
9367 char *stub_name;
9368 const asection *id_sec;
9369 struct _opd_sec_data *opd;
9370
9371 r_type = ELF64_R_TYPE (irela->r_info);
9372 r_indx = ELF64_R_SYM (irela->r_info);
9373
9374 if (r_type >= R_PPC64_max)
9375 {
9376 bfd_set_error (bfd_error_bad_value);
9377 goto error_ret_free_internal;
9378 }
9379
9380 /* Only look for stubs on branch instructions. */
9381 if (r_type != R_PPC64_REL24
9382 && r_type != R_PPC64_REL14
9383 && r_type != R_PPC64_REL14_BRTAKEN
9384 && r_type != R_PPC64_REL14_BRNTAKEN)
9385 continue;
9386
9387 /* Now determine the call target, its name, value,
9388 section. */
9389 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9390 r_indx, input_bfd))
9391 goto error_ret_free_internal;
9392 hash = (struct ppc_link_hash_entry *) h;
9393
9394 ok_dest = FALSE;
9395 fdh = NULL;
9396 sym_value = 0;
9397 if (hash == NULL)
9398 {
9399 sym_value = sym->st_value;
9400 ok_dest = TRUE;
9401 }
9402 else if (hash->elf.root.type == bfd_link_hash_defined
9403 || hash->elf.root.type == bfd_link_hash_defweak)
9404 {
9405 sym_value = hash->elf.root.u.def.value;
9406 if (sym_sec->output_section != NULL)
9407 ok_dest = TRUE;
9408 }
9409 else if (hash->elf.root.type == bfd_link_hash_undefweak
9410 || hash->elf.root.type == bfd_link_hash_undefined)
9411 {
9412 /* Recognise an old ABI func code entry sym, and
9413 use the func descriptor sym instead if it is
9414 defined. */
9415 if (hash->elf.root.root.string[0] == '.'
9416 && (fdh = get_fdh (hash, htab)) != NULL)
9417 {
9418 if (fdh->elf.root.type == bfd_link_hash_defined
9419 || fdh->elf.root.type == bfd_link_hash_defweak)
9420 {
9421 sym_sec = fdh->elf.root.u.def.section;
9422 sym_value = fdh->elf.root.u.def.value;
9423 if (sym_sec->output_section != NULL)
9424 ok_dest = TRUE;
9425 }
9426 else
9427 fdh = NULL;
9428 }
9429 }
9430 else
9431 {
9432 bfd_set_error (bfd_error_bad_value);
9433 goto error_ret_free_internal;
9434 }
9435
9436 destination = 0;
9437 if (ok_dest)
9438 {
9439 sym_value += irela->r_addend;
9440 destination = (sym_value
9441 + sym_sec->output_offset
9442 + sym_sec->output_section->vma);
9443 }
9444
9445 code_sec = sym_sec;
9446 opd = get_opd_info (sym_sec);
9447 if (opd != NULL)
9448 {
9449 bfd_vma dest;
9450
9451 if (hash == NULL && opd->adjust != NULL)
9452 {
9453 long adjust = opd->adjust[sym_value / 8];
9454 if (adjust == -1)
9455 continue;
9456 sym_value += adjust;
9457 }
9458 dest = opd_entry_value (sym_sec, sym_value,
9459 &code_sec, &sym_value);
9460 if (dest != (bfd_vma) -1)
9461 {
9462 destination = dest;
9463 if (fdh != NULL)
9464 {
9465 /* Fixup old ABI sym to point at code
9466 entry. */
9467 hash->elf.root.type = bfd_link_hash_defweak;
9468 hash->elf.root.u.def.section = code_sec;
9469 hash->elf.root.u.def.value = sym_value;
9470 }
9471 }
9472 }
9473
9474 /* Determine what (if any) linker stub is needed. */
9475 stub_type = ppc_type_of_stub (section, irela, &hash,
9476 destination);
9477
9478 if (stub_type != ppc_stub_plt_call)
9479 {
9480 /* Check whether we need a TOC adjusting stub.
9481 Since the linker pastes together pieces from
9482 different object files when creating the
9483 _init and _fini functions, it may be that a
9484 call to what looks like a local sym is in
9485 fact a call needing a TOC adjustment. */
9486 if (code_sec != NULL
9487 && code_sec->output_section != NULL
9488 && (htab->stub_group[code_sec->id].toc_off
9489 != htab->stub_group[section->id].toc_off)
9490 && (code_sec->has_toc_reloc
9491 || code_sec->makes_toc_func_call))
9492 stub_type = ppc_stub_long_branch_r2off;
9493 }
9494
9495 if (stub_type == ppc_stub_none)
9496 continue;
9497
9498 /* __tls_get_addr calls might be eliminated. */
9499 if (stub_type != ppc_stub_plt_call
9500 && hash != NULL
9501 && (hash == htab->tls_get_addr
9502 || hash == htab->tls_get_addr_fd)
9503 && section->has_tls_reloc
9504 && irela != internal_relocs)
9505 {
9506 /* Get tls info. */
9507 char *tls_mask;
9508
9509 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9510 irela - 1, input_bfd))
9511 goto error_ret_free_internal;
9512 if (*tls_mask != 0)
9513 continue;
9514 }
9515
9516 /* Support for grouping stub sections. */
9517 id_sec = htab->stub_group[section->id].link_sec;
9518
9519 /* Get the name of this stub. */
9520 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9521 if (!stub_name)
9522 goto error_ret_free_internal;
9523
9524 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9525 stub_name, FALSE, FALSE);
9526 if (stub_entry != NULL)
9527 {
9528 /* The proper stub has already been created. */
9529 free (stub_name);
9530 continue;
9531 }
9532
9533 stub_entry = ppc_add_stub (stub_name, section, htab);
9534 if (stub_entry == NULL)
9535 {
9536 free (stub_name);
9537 error_ret_free_internal:
9538 if (elf_section_data (section)->relocs == NULL)
9539 free (internal_relocs);
9540 error_ret_free_local:
9541 if (local_syms != NULL
9542 && (symtab_hdr->contents
9543 != (unsigned char *) local_syms))
9544 free (local_syms);
9545 return FALSE;
9546 }
9547
9548 stub_entry->stub_type = stub_type;
9549 stub_entry->target_value = sym_value;
9550 stub_entry->target_section = code_sec;
9551 stub_entry->h = hash;
9552 stub_entry->addend = irela->r_addend;
9553
9554 if (stub_entry->h != NULL)
9555 htab->stub_globals += 1;
9556 }
9557
9558 /* We're done with the internal relocs, free them. */
9559 if (elf_section_data (section)->relocs != internal_relocs)
9560 free (internal_relocs);
9561 }
9562
9563 if (local_syms != NULL
9564 && symtab_hdr->contents != (unsigned char *) local_syms)
9565 {
9566 if (!info->keep_memory)
9567 free (local_syms);
9568 else
9569 symtab_hdr->contents = (unsigned char *) local_syms;
9570 }
9571 }
9572
9573 /* We may have added some stubs. Find out the new size of the
9574 stub sections. */
9575 for (stub_sec = htab->stub_bfd->sections;
9576 stub_sec != NULL;
9577 stub_sec = stub_sec->next)
9578 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9579 {
9580 stub_sec->rawsize = stub_sec->size;
9581 stub_sec->size = 0;
9582 stub_sec->reloc_count = 0;
9583 stub_sec->flags &= ~SEC_RELOC;
9584 }
9585
9586 htab->brlt->size = 0;
9587 htab->brlt->reloc_count = 0;
9588 htab->brlt->flags &= ~SEC_RELOC;
9589 if (htab->relbrlt != NULL)
9590 htab->relbrlt->size = 0;
9591
9592 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9593
9594 for (stub_sec = htab->stub_bfd->sections;
9595 stub_sec != NULL;
9596 stub_sec = stub_sec->next)
9597 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9598 && stub_sec->rawsize != stub_sec->size)
9599 break;
9600
9601 /* Exit from this loop when no stubs have been added, and no stubs
9602 have changed size. */
9603 if (stub_sec == NULL)
9604 break;
9605
9606 /* Ask the linker to do its stuff. */
9607 (*htab->layout_sections_again) ();
9608 }
9609
9610 /* It would be nice to strip htab->brlt from the output if the
9611 section is empty, but it's too late. If we strip sections here,
9612 the dynamic symbol table is corrupted since the section symbol
9613 for the stripped section isn't written. */
9614
9615 return TRUE;
9616 }
9617
9618 /* Called after we have determined section placement. If sections
9619 move, we'll be called again. Provide a value for TOCstart. */
9620
9621 bfd_vma
9622 ppc64_elf_toc (bfd *obfd)
9623 {
9624 asection *s;
9625 bfd_vma TOCstart;
9626
9627 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9628 order. The TOC starts where the first of these sections starts. */
9629 s = bfd_get_section_by_name (obfd, ".got");
9630 if (s == NULL)
9631 s = bfd_get_section_by_name (obfd, ".toc");
9632 if (s == NULL)
9633 s = bfd_get_section_by_name (obfd, ".tocbss");
9634 if (s == NULL)
9635 s = bfd_get_section_by_name (obfd, ".plt");
9636 if (s == NULL)
9637 {
9638 /* This may happen for
9639 o references to TOC base (SYM@toc / TOC[tc0]) without a
9640 .toc directive
9641 o bad linker script
9642 o --gc-sections and empty TOC sections
9643
9644 FIXME: Warn user? */
9645
9646 /* Look for a likely section. We probably won't even be
9647 using TOCstart. */
9648 for (s = obfd->sections; s != NULL; s = s->next)
9649 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9650 == (SEC_ALLOC | SEC_SMALL_DATA))
9651 break;
9652 if (s == NULL)
9653 for (s = obfd->sections; s != NULL; s = s->next)
9654 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9655 == (SEC_ALLOC | SEC_SMALL_DATA))
9656 break;
9657 if (s == NULL)
9658 for (s = obfd->sections; s != NULL; s = s->next)
9659 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9660 break;
9661 if (s == NULL)
9662 for (s = obfd->sections; s != NULL; s = s->next)
9663 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9664 break;
9665 }
9666
9667 TOCstart = 0;
9668 if (s != NULL)
9669 TOCstart = s->output_section->vma + s->output_offset;
9670
9671 return TOCstart;
9672 }
9673
9674 /* Build all the stubs associated with the current output file.
9675 The stubs are kept in a hash table attached to the main linker
9676 hash table. This function is called via gldelf64ppc_finish. */
9677
9678 bfd_boolean
9679 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9680 struct bfd_link_info *info,
9681 char **stats)
9682 {
9683 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9684 asection *stub_sec;
9685 bfd_byte *p;
9686 int stub_sec_count = 0;
9687
9688 htab->emit_stub_syms = emit_stub_syms;
9689
9690 /* Allocate memory to hold the linker stubs. */
9691 for (stub_sec = htab->stub_bfd->sections;
9692 stub_sec != NULL;
9693 stub_sec = stub_sec->next)
9694 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9695 && stub_sec->size != 0)
9696 {
9697 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9698 if (stub_sec->contents == NULL)
9699 return FALSE;
9700 /* We want to check that built size is the same as calculated
9701 size. rawsize is a convenient location to use. */
9702 stub_sec->rawsize = stub_sec->size;
9703 stub_sec->size = 0;
9704 }
9705
9706 if (htab->glink != NULL && htab->glink->size != 0)
9707 {
9708 unsigned int indx;
9709 bfd_vma plt0;
9710
9711 /* Build the .glink plt call stub. */
9712 if (htab->emit_stub_syms)
9713 {
9714 struct elf_link_hash_entry *h;
9715 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE);
9716 if (h == NULL)
9717 return FALSE;
9718 if (h->root.type == bfd_link_hash_new)
9719 {
9720 h->root.type = bfd_link_hash_defined;
9721 h->root.u.def.section = htab->glink;
9722 h->root.u.def.value = 8;
9723 h->ref_regular = 1;
9724 h->def_regular = 1;
9725 h->ref_regular_nonweak = 1;
9726 h->forced_local = 1;
9727 h->non_elf = 0;
9728 }
9729 }
9730 p = htab->glink->contents;
9731 plt0 = (htab->plt->output_section->vma
9732 + htab->plt->output_offset
9733 - (htab->glink->output_section->vma
9734 + htab->glink->output_offset
9735 + 16));
9736 bfd_put_64 (htab->glink->owner, plt0, p);
9737 p += 8;
9738 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9739 p += 4;
9740 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9741 p += 4;
9742 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9743 p += 4;
9744 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9745 p += 4;
9746 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
9747 p += 4;
9748 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
9749 p += 4;
9750 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
9751 p += 4;
9752 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
9753 p += 4;
9754 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
9755 p += 4;
9756 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
9757 p += 4;
9758 bfd_put_32 (htab->glink->owner, BCTR, p);
9759 p += 4;
9760 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
9761 {
9762 bfd_put_32 (htab->glink->owner, NOP, p);
9763 p += 4;
9764 }
9765
9766 /* Build the .glink lazy link call stubs. */
9767 indx = 0;
9768 while (p < htab->glink->contents + htab->glink->size)
9769 {
9770 if (indx < 0x8000)
9771 {
9772 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
9773 p += 4;
9774 }
9775 else
9776 {
9777 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
9778 p += 4;
9779 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
9780 p += 4;
9781 }
9782 bfd_put_32 (htab->glink->owner,
9783 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
9784 indx++;
9785 p += 4;
9786 }
9787 htab->glink->rawsize = p - htab->glink->contents;
9788 }
9789
9790 if (htab->brlt->size != 0)
9791 {
9792 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
9793 htab->brlt->size);
9794 if (htab->brlt->contents == NULL)
9795 return FALSE;
9796 }
9797 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
9798 {
9799 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
9800 htab->relbrlt->size);
9801 if (htab->relbrlt->contents == NULL)
9802 return FALSE;
9803 }
9804
9805 /* Build the stubs as directed by the stub hash table. */
9806 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
9807
9808 if (htab->relbrlt != NULL)
9809 htab->relbrlt->reloc_count = 0;
9810
9811 for (stub_sec = htab->stub_bfd->sections;
9812 stub_sec != NULL;
9813 stub_sec = stub_sec->next)
9814 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9815 {
9816 stub_sec_count += 1;
9817 if (stub_sec->rawsize != stub_sec->size)
9818 break;
9819 }
9820
9821 if (stub_sec != NULL
9822 || htab->glink->rawsize != htab->glink->size)
9823 {
9824 htab->stub_error = TRUE;
9825 (*_bfd_error_handler) (_("stubs don't match calculated size"));
9826 }
9827
9828 if (htab->stub_error)
9829 return FALSE;
9830
9831 if (stats != NULL)
9832 {
9833 *stats = bfd_malloc (500);
9834 if (*stats == NULL)
9835 return FALSE;
9836
9837 sprintf (*stats, _("linker stubs in %u group%s\n"
9838 " branch %lu\n"
9839 " toc adjust %lu\n"
9840 " long branch %lu\n"
9841 " long toc adj %lu\n"
9842 " plt call %lu"),
9843 stub_sec_count,
9844 stub_sec_count == 1 ? "" : "s",
9845 htab->stub_count[ppc_stub_long_branch - 1],
9846 htab->stub_count[ppc_stub_long_branch_r2off - 1],
9847 htab->stub_count[ppc_stub_plt_branch - 1],
9848 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
9849 htab->stub_count[ppc_stub_plt_call - 1]);
9850 }
9851 return TRUE;
9852 }
9853
9854 /* This function undoes the changes made by add_symbol_adjust. */
9855
9856 static bfd_boolean
9857 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
9858 {
9859 struct ppc_link_hash_entry *eh;
9860
9861 if (h->root.type == bfd_link_hash_indirect)
9862 return TRUE;
9863
9864 if (h->root.type == bfd_link_hash_warning)
9865 h = (struct elf_link_hash_entry *) h->root.u.i.link;
9866
9867 eh = (struct ppc_link_hash_entry *) h;
9868 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
9869 return TRUE;
9870
9871 eh->elf.root.type = bfd_link_hash_undefined;
9872 return TRUE;
9873 }
9874
9875 void
9876 ppc64_elf_restore_symbols (struct bfd_link_info *info)
9877 {
9878 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9879 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
9880 }
9881
9882 /* What to do when ld finds relocations against symbols defined in
9883 discarded sections. */
9884
9885 static unsigned int
9886 ppc64_elf_action_discarded (asection *sec)
9887 {
9888 if (strcmp (".opd", sec->name) == 0)
9889 return 0;
9890
9891 if (strcmp (".toc", sec->name) == 0)
9892 return 0;
9893
9894 if (strcmp (".toc1", sec->name) == 0)
9895 return 0;
9896
9897 return _bfd_elf_default_action_discarded (sec);
9898 }
9899
9900 /* The RELOCATE_SECTION function is called by the ELF backend linker
9901 to handle the relocations for a section.
9902
9903 The relocs are always passed as Rela structures; if the section
9904 actually uses Rel structures, the r_addend field will always be
9905 zero.
9906
9907 This function is responsible for adjust the section contents as
9908 necessary, and (if using Rela relocs and generating a
9909 relocatable output file) adjusting the reloc addend as
9910 necessary.
9911
9912 This function does not have to worry about setting the reloc
9913 address or the reloc symbol index.
9914
9915 LOCAL_SYMS is a pointer to the swapped in local symbols.
9916
9917 LOCAL_SECTIONS is an array giving the section in the input file
9918 corresponding to the st_shndx field of each local symbol.
9919
9920 The global hash table entry for the global symbols can be found
9921 via elf_sym_hashes (input_bfd).
9922
9923 When generating relocatable output, this function must handle
9924 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
9925 going to be the section symbol corresponding to the output
9926 section, which means that the addend must be adjusted
9927 accordingly. */
9928
9929 static bfd_boolean
9930 ppc64_elf_relocate_section (bfd *output_bfd,
9931 struct bfd_link_info *info,
9932 bfd *input_bfd,
9933 asection *input_section,
9934 bfd_byte *contents,
9935 Elf_Internal_Rela *relocs,
9936 Elf_Internal_Sym *local_syms,
9937 asection **local_sections)
9938 {
9939 struct ppc_link_hash_table *htab;
9940 Elf_Internal_Shdr *symtab_hdr;
9941 struct elf_link_hash_entry **sym_hashes;
9942 Elf_Internal_Rela *rel;
9943 Elf_Internal_Rela *relend;
9944 Elf_Internal_Rela outrel;
9945 bfd_byte *loc;
9946 struct got_entry **local_got_ents;
9947 bfd_vma TOCstart;
9948 bfd_boolean ret = TRUE;
9949 bfd_boolean is_opd;
9950 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
9951 bfd_boolean is_power4 = FALSE;
9952 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
9953
9954 /* Initialize howto table if needed. */
9955 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
9956 ppc_howto_init ();
9957
9958 htab = ppc_hash_table (info);
9959
9960 /* Don't relocate stub sections. */
9961 if (input_section->owner == htab->stub_bfd)
9962 return TRUE;
9963
9964 BFD_ASSERT (is_ppc64_elf_target (input_bfd->xvec));
9965
9966 local_got_ents = elf_local_got_ents (input_bfd);
9967 TOCstart = elf_gp (output_bfd);
9968 symtab_hdr = &elf_symtab_hdr (input_bfd);
9969 sym_hashes = elf_sym_hashes (input_bfd);
9970 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
9971
9972 rel = relocs;
9973 relend = relocs + input_section->reloc_count;
9974 for (; rel < relend; rel++)
9975 {
9976 enum elf_ppc64_reloc_type r_type;
9977 bfd_vma addend, orig_addend;
9978 bfd_reloc_status_type r;
9979 Elf_Internal_Sym *sym;
9980 asection *sec;
9981 struct elf_link_hash_entry *h_elf;
9982 struct ppc_link_hash_entry *h;
9983 struct ppc_link_hash_entry *fdh;
9984 const char *sym_name;
9985 unsigned long r_symndx, toc_symndx;
9986 char tls_mask, tls_gd, tls_type;
9987 char sym_type;
9988 bfd_vma relocation;
9989 bfd_boolean unresolved_reloc;
9990 bfd_boolean warned;
9991 unsigned long insn, mask;
9992 struct ppc_stub_hash_entry *stub_entry;
9993 bfd_vma max_br_offset;
9994 bfd_vma from;
9995
9996 r_type = ELF64_R_TYPE (rel->r_info);
9997 r_symndx = ELF64_R_SYM (rel->r_info);
9998
9999 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10000 symbol of the previous ADDR64 reloc. The symbol gives us the
10001 proper TOC base to use. */
10002 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10003 && rel != relocs
10004 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10005 && is_opd)
10006 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10007
10008 sym = NULL;
10009 sec = NULL;
10010 h_elf = NULL;
10011 sym_name = NULL;
10012 unresolved_reloc = FALSE;
10013 warned = FALSE;
10014 orig_addend = rel->r_addend;
10015
10016 if (r_symndx < symtab_hdr->sh_info)
10017 {
10018 /* It's a local symbol. */
10019 struct _opd_sec_data *opd;
10020
10021 sym = local_syms + r_symndx;
10022 sec = local_sections[r_symndx];
10023 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10024 sym_type = ELF64_ST_TYPE (sym->st_info);
10025 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10026 opd = get_opd_info (sec);
10027 if (opd != NULL && opd->adjust != NULL)
10028 {
10029 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10030 if (adjust == -1)
10031 relocation = 0;
10032 else
10033 {
10034 /* If this is a relocation against the opd section sym
10035 and we have edited .opd, adjust the reloc addend so
10036 that ld -r and ld --emit-relocs output is correct.
10037 If it is a reloc against some other .opd symbol,
10038 then the symbol value will be adjusted later. */
10039 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10040 rel->r_addend += adjust;
10041 else
10042 relocation += adjust;
10043 }
10044 }
10045 }
10046 else
10047 {
10048 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10049 r_symndx, symtab_hdr, sym_hashes,
10050 h_elf, sec, relocation,
10051 unresolved_reloc, warned);
10052 sym_name = h_elf->root.root.string;
10053 sym_type = h_elf->type;
10054 }
10055 h = (struct ppc_link_hash_entry *) h_elf;
10056
10057 if (sec != NULL && elf_discarded_section (sec))
10058 {
10059 /* For relocs against symbols from removed linkonce sections,
10060 or sections discarded by a linker script, we just want the
10061 section contents zeroed. Avoid any special processing. */
10062 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10063 contents + rel->r_offset);
10064 rel->r_info = 0;
10065 rel->r_addend = 0;
10066 continue;
10067 }
10068
10069 if (info->relocatable)
10070 continue;
10071
10072 /* TLS optimizations. Replace instruction sequences and relocs
10073 based on information we collected in tls_optimize. We edit
10074 RELOCS so that --emit-relocs will output something sensible
10075 for the final instruction stream. */
10076 tls_mask = 0;
10077 tls_gd = 0;
10078 toc_symndx = 0;
10079 if (IS_PPC64_TLS_RELOC (r_type))
10080 {
10081 if (h != NULL)
10082 tls_mask = h->tls_mask;
10083 else if (local_got_ents != NULL)
10084 {
10085 char *lgot_masks;
10086 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10087 tls_mask = lgot_masks[r_symndx];
10088 }
10089 if (tls_mask == 0 && r_type == R_PPC64_TLS)
10090 {
10091 /* Check for toc tls entries. */
10092 char *toc_tls;
10093
10094 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10095 rel, input_bfd))
10096 return FALSE;
10097
10098 if (toc_tls)
10099 tls_mask = *toc_tls;
10100 }
10101 }
10102
10103 /* Check that tls relocs are used with tls syms, and non-tls
10104 relocs are used with non-tls syms. */
10105 if (r_symndx != 0
10106 && r_type != R_PPC64_NONE
10107 && (h == NULL
10108 || h->elf.root.type == bfd_link_hash_defined
10109 || h->elf.root.type == bfd_link_hash_defweak)
10110 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS))
10111 {
10112 if (r_type == R_PPC64_TLS && tls_mask != 0)
10113 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10114 ;
10115 else
10116 (*_bfd_error_handler)
10117 (sym_type == STT_TLS
10118 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10119 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10120 input_bfd,
10121 input_section,
10122 (long) rel->r_offset,
10123 ppc64_elf_howto_table[r_type]->name,
10124 sym_name);
10125 }
10126
10127 /* Ensure reloc mapping code below stays sane. */
10128 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10129 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10130 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10131 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10132 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10133 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10134 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10135 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10136 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10137 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10138 abort ();
10139
10140 switch (r_type)
10141 {
10142 default:
10143 break;
10144
10145 case R_PPC64_TOC16:
10146 case R_PPC64_TOC16_LO:
10147 case R_PPC64_TOC16_DS:
10148 case R_PPC64_TOC16_LO_DS:
10149 {
10150 /* Check for toc tls entries. */
10151 char *toc_tls;
10152 int retval;
10153
10154 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10155 rel, input_bfd);
10156 if (retval == 0)
10157 return FALSE;
10158
10159 if (toc_tls)
10160 {
10161 tls_mask = *toc_tls;
10162 if (r_type == R_PPC64_TOC16_DS
10163 || r_type == R_PPC64_TOC16_LO_DS)
10164 {
10165 if (tls_mask != 0
10166 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10167 goto toctprel;
10168 }
10169 else
10170 {
10171 /* If we found a GD reloc pair, then we might be
10172 doing a GD->IE transition. */
10173 if (retval == 2)
10174 {
10175 tls_gd = TLS_TPRELGD;
10176 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10177 goto tls_ldgd_opt;
10178 }
10179 else if (retval == 3)
10180 {
10181 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10182 goto tls_ldgd_opt;
10183 }
10184 }
10185 }
10186 }
10187 break;
10188
10189 case R_PPC64_GOT_TPREL16_DS:
10190 case R_PPC64_GOT_TPREL16_LO_DS:
10191 if (tls_mask != 0
10192 && (tls_mask & TLS_TPREL) == 0)
10193 {
10194 toctprel:
10195 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10196 insn &= 31 << 21;
10197 insn |= 0x3c0d0000; /* addis 0,13,0 */
10198 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10199 r_type = R_PPC64_TPREL16_HA;
10200 if (toc_symndx != 0)
10201 {
10202 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10203 /* We changed the symbol. Start over in order to
10204 get h, sym, sec etc. right. */
10205 rel--;
10206 continue;
10207 }
10208 else
10209 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10210 }
10211 break;
10212
10213 case R_PPC64_TLS:
10214 if (tls_mask != 0
10215 && (tls_mask & TLS_TPREL) == 0)
10216 {
10217 bfd_vma rtra;
10218 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10219 if ((insn & ((0x3f << 26) | (31 << 11)))
10220 == ((31 << 26) | (13 << 11)))
10221 rtra = insn & ((1 << 26) - (1 << 16));
10222 else if ((insn & ((0x3f << 26) | (31 << 16)))
10223 == ((31 << 26) | (13 << 16)))
10224 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10225 else
10226 abort ();
10227 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10228 /* add -> addi. */
10229 insn = 14 << 26;
10230 else if ((insn & (31 << 1)) == 23 << 1
10231 && ((insn & (31 << 6)) < 14 << 6
10232 || ((insn & (31 << 6)) >= 16 << 6
10233 && (insn & (31 << 6)) < 24 << 6)))
10234 /* load and store indexed -> dform. */
10235 insn = (32 | ((insn >> 6) & 31)) << 26;
10236 else if ((insn & (31 << 1)) == 21 << 1
10237 && (insn & (0x1a << 6)) == 0)
10238 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10239 insn = (((58 | ((insn >> 6) & 4)) << 26)
10240 | ((insn >> 6) & 1));
10241 else if ((insn & (31 << 1)) == 21 << 1
10242 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10243 /* lwax -> lwa. */
10244 insn = (58 << 26) | 2;
10245 else
10246 abort ();
10247 insn |= rtra;
10248 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10249 /* Was PPC64_TLS which sits on insn boundary, now
10250 PPC64_TPREL16_LO which is at low-order half-word. */
10251 rel->r_offset += d_offset;
10252 r_type = R_PPC64_TPREL16_LO;
10253 if (toc_symndx != 0)
10254 {
10255 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10256 /* We changed the symbol. Start over in order to
10257 get h, sym, sec etc. right. */
10258 rel--;
10259 continue;
10260 }
10261 else
10262 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10263 }
10264 break;
10265
10266 case R_PPC64_GOT_TLSGD16_HI:
10267 case R_PPC64_GOT_TLSGD16_HA:
10268 tls_gd = TLS_TPRELGD;
10269 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10270 goto tls_gdld_hi;
10271 break;
10272
10273 case R_PPC64_GOT_TLSLD16_HI:
10274 case R_PPC64_GOT_TLSLD16_HA:
10275 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10276 {
10277 tls_gdld_hi:
10278 if ((tls_mask & tls_gd) != 0)
10279 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10280 + R_PPC64_GOT_TPREL16_DS);
10281 else
10282 {
10283 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10284 rel->r_offset -= d_offset;
10285 r_type = R_PPC64_NONE;
10286 }
10287 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10288 }
10289 break;
10290
10291 case R_PPC64_GOT_TLSGD16:
10292 case R_PPC64_GOT_TLSGD16_LO:
10293 tls_gd = TLS_TPRELGD;
10294 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10295 goto tls_ldgd_opt;
10296 break;
10297
10298 case R_PPC64_GOT_TLSLD16:
10299 case R_PPC64_GOT_TLSLD16_LO:
10300 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10301 {
10302 bfd_vma insn1, insn2, insn3;
10303 bfd_vma offset;
10304
10305 tls_ldgd_opt:
10306 /* We know that the next reloc is on a tls_get_addr
10307 call, since ppc64_elf_tls_optimize checks this. */
10308 offset = rel[1].r_offset;
10309 insn1 = bfd_get_32 (output_bfd,
10310 contents + rel->r_offset - d_offset);
10311 insn3 = bfd_get_32 (output_bfd,
10312 contents + offset + 4);
10313 if ((tls_mask & tls_gd) != 0)
10314 {
10315 /* IE */
10316 insn1 &= (1 << 26) - (1 << 2);
10317 insn1 |= 58 << 26; /* ld */
10318 insn2 = 0x7c636a14; /* add 3,3,13 */
10319 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10320 R_PPC64_NONE);
10321 if ((tls_mask & TLS_EXPLICIT) == 0)
10322 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10323 + R_PPC64_GOT_TPREL16_DS);
10324 else
10325 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10326 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10327 }
10328 else
10329 {
10330 /* LE */
10331 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10332 insn2 = 0x38630000; /* addi 3,3,0 */
10333 if (tls_gd == 0)
10334 {
10335 /* Was an LD reloc. */
10336 r_symndx = 0;
10337 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10338 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10339 }
10340 else if (toc_symndx != 0)
10341 r_symndx = toc_symndx;
10342 r_type = R_PPC64_TPREL16_HA;
10343 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10344 rel[1].r_info = ELF64_R_INFO (r_symndx,
10345 R_PPC64_TPREL16_LO);
10346 rel[1].r_offset += d_offset;
10347 }
10348 if (insn3 == NOP
10349 || insn3 == CROR_151515 || insn3 == CROR_313131)
10350 {
10351 insn3 = insn2;
10352 insn2 = NOP;
10353 rel[1].r_offset += 4;
10354 }
10355 bfd_put_32 (output_bfd, insn1,
10356 contents + rel->r_offset - d_offset);
10357 bfd_put_32 (output_bfd, insn2, contents + offset);
10358 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10359 if (tls_gd == 0 || toc_symndx != 0)
10360 {
10361 /* We changed the symbol. Start over in order
10362 to get h, sym, sec etc. right. */
10363 rel--;
10364 continue;
10365 }
10366 }
10367 break;
10368
10369 case R_PPC64_DTPMOD64:
10370 if (rel + 1 < relend
10371 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10372 && rel[1].r_offset == rel->r_offset + 8)
10373 {
10374 if ((tls_mask & TLS_GD) == 0)
10375 {
10376 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10377 if ((tls_mask & TLS_TPRELGD) != 0)
10378 r_type = R_PPC64_TPREL64;
10379 else
10380 {
10381 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10382 r_type = R_PPC64_NONE;
10383 }
10384 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10385 }
10386 }
10387 else
10388 {
10389 if ((tls_mask & TLS_LD) == 0)
10390 {
10391 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10392 r_type = R_PPC64_NONE;
10393 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10394 }
10395 }
10396 break;
10397
10398 case R_PPC64_TPREL64:
10399 if ((tls_mask & TLS_TPREL) == 0)
10400 {
10401 r_type = R_PPC64_NONE;
10402 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10403 }
10404 break;
10405 }
10406
10407 /* Handle other relocations that tweak non-addend part of insn. */
10408 insn = 0;
10409 max_br_offset = 1 << 25;
10410 addend = rel->r_addend;
10411 switch (r_type)
10412 {
10413 default:
10414 break;
10415
10416 /* Branch taken prediction relocations. */
10417 case R_PPC64_ADDR14_BRTAKEN:
10418 case R_PPC64_REL14_BRTAKEN:
10419 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10420 /* Fall thru. */
10421
10422 /* Branch not taken prediction relocations. */
10423 case R_PPC64_ADDR14_BRNTAKEN:
10424 case R_PPC64_REL14_BRNTAKEN:
10425 insn |= bfd_get_32 (output_bfd,
10426 contents + rel->r_offset) & ~(0x01 << 21);
10427 /* Fall thru. */
10428
10429 case R_PPC64_REL14:
10430 max_br_offset = 1 << 15;
10431 /* Fall thru. */
10432
10433 case R_PPC64_REL24:
10434 /* Calls to functions with a different TOC, such as calls to
10435 shared objects, need to alter the TOC pointer. This is
10436 done using a linkage stub. A REL24 branching to these
10437 linkage stubs needs to be followed by a nop, as the nop
10438 will be replaced with an instruction to restore the TOC
10439 base pointer. */
10440 stub_entry = NULL;
10441 fdh = h;
10442 if (((h != NULL
10443 && (((fdh = h->oh) != NULL
10444 && fdh->elf.plt.plist != NULL)
10445 || (fdh = h)->elf.plt.plist != NULL))
10446 || (sec != NULL
10447 && sec->output_section != NULL
10448 && sec->id <= htab->top_id
10449 && (htab->stub_group[sec->id].toc_off
10450 != htab->stub_group[input_section->id].toc_off)))
10451 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10452 rel, htab)) != NULL
10453 && (stub_entry->stub_type == ppc_stub_plt_call
10454 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10455 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10456 {
10457 bfd_boolean can_plt_call = FALSE;
10458
10459 if (rel->r_offset + 8 <= input_section->size)
10460 {
10461 unsigned long nop;
10462 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10463 if (nop == NOP
10464 || nop == CROR_151515 || nop == CROR_313131)
10465 {
10466 bfd_put_32 (input_bfd, LD_R2_40R1,
10467 contents + rel->r_offset + 4);
10468 can_plt_call = TRUE;
10469 }
10470 }
10471
10472 if (!can_plt_call)
10473 {
10474 if (stub_entry->stub_type == ppc_stub_plt_call)
10475 {
10476 /* If this is a plain branch rather than a branch
10477 and link, don't require a nop. However, don't
10478 allow tail calls in a shared library as they
10479 will result in r2 being corrupted. */
10480 unsigned long br;
10481 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10482 if (info->executable && (br & 1) == 0)
10483 can_plt_call = TRUE;
10484 else
10485 stub_entry = NULL;
10486 }
10487 else if (h != NULL
10488 && strcmp (h->elf.root.root.string,
10489 ".__libc_start_main") == 0)
10490 {
10491 /* Allow crt1 branch to go via a toc adjusting stub. */
10492 can_plt_call = TRUE;
10493 }
10494 else
10495 {
10496 if (strcmp (input_section->output_section->name,
10497 ".init") == 0
10498 || strcmp (input_section->output_section->name,
10499 ".fini") == 0)
10500 (*_bfd_error_handler)
10501 (_("%B(%A+0x%lx): automatic multiple TOCs "
10502 "not supported using your crt files; "
10503 "recompile with -mminimal-toc or upgrade gcc"),
10504 input_bfd,
10505 input_section,
10506 (long) rel->r_offset);
10507 else
10508 (*_bfd_error_handler)
10509 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10510 "does not allow automatic multiple TOCs; "
10511 "recompile with -mminimal-toc or "
10512 "-fno-optimize-sibling-calls, "
10513 "or make `%s' extern"),
10514 input_bfd,
10515 input_section,
10516 (long) rel->r_offset,
10517 sym_name,
10518 sym_name);
10519 bfd_set_error (bfd_error_bad_value);
10520 ret = FALSE;
10521 }
10522 }
10523
10524 if (can_plt_call
10525 && stub_entry->stub_type == ppc_stub_plt_call)
10526 unresolved_reloc = FALSE;
10527 }
10528
10529 if (stub_entry == NULL
10530 && get_opd_info (sec) != NULL)
10531 {
10532 /* The branch destination is the value of the opd entry. */
10533 bfd_vma off = (relocation + addend
10534 - sec->output_section->vma
10535 - sec->output_offset);
10536 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10537 if (dest != (bfd_vma) -1)
10538 {
10539 relocation = dest;
10540 addend = 0;
10541 }
10542 }
10543
10544 /* If the branch is out of reach we ought to have a long
10545 branch stub. */
10546 from = (rel->r_offset
10547 + input_section->output_offset
10548 + input_section->output_section->vma);
10549
10550 if (stub_entry == NULL
10551 && (relocation + addend - from + max_br_offset
10552 >= 2 * max_br_offset)
10553 && r_type != R_PPC64_ADDR14_BRTAKEN
10554 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10555 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10556 htab);
10557
10558 if (stub_entry != NULL)
10559 {
10560 /* Munge up the value and addend so that we call the stub
10561 rather than the procedure directly. */
10562 relocation = (stub_entry->stub_offset
10563 + stub_entry->stub_sec->output_offset
10564 + stub_entry->stub_sec->output_section->vma);
10565 addend = 0;
10566 }
10567
10568 if (insn != 0)
10569 {
10570 if (is_power4)
10571 {
10572 /* Set 'a' bit. This is 0b00010 in BO field for branch
10573 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10574 for branch on CTR insns (BO == 1a00t or 1a01t). */
10575 if ((insn & (0x14 << 21)) == (0x04 << 21))
10576 insn |= 0x02 << 21;
10577 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10578 insn |= 0x08 << 21;
10579 else
10580 break;
10581 }
10582 else
10583 {
10584 /* Invert 'y' bit if not the default. */
10585 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10586 insn ^= 0x01 << 21;
10587 }
10588
10589 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10590 }
10591
10592 /* NOP out calls to undefined weak functions.
10593 We can thus call a weak function without first
10594 checking whether the function is defined. */
10595 else if (h != NULL
10596 && h->elf.root.type == bfd_link_hash_undefweak
10597 && r_type == R_PPC64_REL24
10598 && relocation == 0
10599 && addend == 0)
10600 {
10601 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10602 continue;
10603 }
10604 break;
10605 }
10606
10607 /* Set `addend'. */
10608 tls_type = 0;
10609 switch (r_type)
10610 {
10611 default:
10612 (*_bfd_error_handler)
10613 (_("%B: unknown relocation type %d for symbol %s"),
10614 input_bfd, (int) r_type, sym_name);
10615
10616 bfd_set_error (bfd_error_bad_value);
10617 ret = FALSE;
10618 continue;
10619
10620 case R_PPC64_NONE:
10621 case R_PPC64_TLS:
10622 case R_PPC64_GNU_VTINHERIT:
10623 case R_PPC64_GNU_VTENTRY:
10624 continue;
10625
10626 /* GOT16 relocations. Like an ADDR16 using the symbol's
10627 address in the GOT as relocation value instead of the
10628 symbol's value itself. Also, create a GOT entry for the
10629 symbol and put the symbol value there. */
10630 case R_PPC64_GOT_TLSGD16:
10631 case R_PPC64_GOT_TLSGD16_LO:
10632 case R_PPC64_GOT_TLSGD16_HI:
10633 case R_PPC64_GOT_TLSGD16_HA:
10634 tls_type = TLS_TLS | TLS_GD;
10635 goto dogot;
10636
10637 case R_PPC64_GOT_TLSLD16:
10638 case R_PPC64_GOT_TLSLD16_LO:
10639 case R_PPC64_GOT_TLSLD16_HI:
10640 case R_PPC64_GOT_TLSLD16_HA:
10641 tls_type = TLS_TLS | TLS_LD;
10642 goto dogot;
10643
10644 case R_PPC64_GOT_TPREL16_DS:
10645 case R_PPC64_GOT_TPREL16_LO_DS:
10646 case R_PPC64_GOT_TPREL16_HI:
10647 case R_PPC64_GOT_TPREL16_HA:
10648 tls_type = TLS_TLS | TLS_TPREL;
10649 goto dogot;
10650
10651 case R_PPC64_GOT_DTPREL16_DS:
10652 case R_PPC64_GOT_DTPREL16_LO_DS:
10653 case R_PPC64_GOT_DTPREL16_HI:
10654 case R_PPC64_GOT_DTPREL16_HA:
10655 tls_type = TLS_TLS | TLS_DTPREL;
10656 goto dogot;
10657
10658 case R_PPC64_GOT16:
10659 case R_PPC64_GOT16_LO:
10660 case R_PPC64_GOT16_HI:
10661 case R_PPC64_GOT16_HA:
10662 case R_PPC64_GOT16_DS:
10663 case R_PPC64_GOT16_LO_DS:
10664 dogot:
10665 {
10666 /* Relocation is to the entry for this symbol in the global
10667 offset table. */
10668 asection *got;
10669 bfd_vma *offp;
10670 bfd_vma off;
10671 unsigned long indx = 0;
10672
10673 if (tls_type == (TLS_TLS | TLS_LD)
10674 && (h == NULL
10675 || !h->elf.def_dynamic))
10676 offp = &ppc64_tlsld_got (input_bfd)->offset;
10677 else
10678 {
10679 struct got_entry *ent;
10680
10681 if (h != NULL)
10682 {
10683 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10684 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10685 &h->elf)
10686 || (info->shared
10687 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10688 /* This is actually a static link, or it is a
10689 -Bsymbolic link and the symbol is defined
10690 locally, or the symbol was forced to be local
10691 because of a version file. */
10692 ;
10693 else
10694 {
10695 indx = h->elf.dynindx;
10696 unresolved_reloc = FALSE;
10697 }
10698 ent = h->elf.got.glist;
10699 }
10700 else
10701 {
10702 if (local_got_ents == NULL)
10703 abort ();
10704 ent = local_got_ents[r_symndx];
10705 }
10706
10707 for (; ent != NULL; ent = ent->next)
10708 if (ent->addend == orig_addend
10709 && ent->owner == input_bfd
10710 && ent->tls_type == tls_type)
10711 break;
10712 if (ent == NULL)
10713 abort ();
10714 offp = &ent->got.offset;
10715 }
10716
10717 got = ppc64_elf_tdata (input_bfd)->got;
10718 if (got == NULL)
10719 abort ();
10720
10721 /* The offset must always be a multiple of 8. We use the
10722 least significant bit to record whether we have already
10723 processed this entry. */
10724 off = *offp;
10725 if ((off & 1) != 0)
10726 off &= ~1;
10727 else
10728 {
10729 /* Generate relocs for the dynamic linker, except in
10730 the case of TLSLD where we'll use one entry per
10731 module. */
10732 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
10733
10734 *offp = off | 1;
10735 if ((info->shared || indx != 0)
10736 && (h == NULL
10737 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10738 || h->elf.root.type != bfd_link_hash_undefweak))
10739 {
10740 outrel.r_offset = (got->output_section->vma
10741 + got->output_offset
10742 + off);
10743 outrel.r_addend = addend;
10744 if (tls_type & (TLS_LD | TLS_GD))
10745 {
10746 outrel.r_addend = 0;
10747 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
10748 if (tls_type == (TLS_TLS | TLS_GD))
10749 {
10750 loc = relgot->contents;
10751 loc += (relgot->reloc_count++
10752 * sizeof (Elf64_External_Rela));
10753 bfd_elf64_swap_reloca_out (output_bfd,
10754 &outrel, loc);
10755 outrel.r_offset += 8;
10756 outrel.r_addend = addend;
10757 outrel.r_info
10758 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10759 }
10760 }
10761 else if (tls_type == (TLS_TLS | TLS_DTPREL))
10762 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
10763 else if (tls_type == (TLS_TLS | TLS_TPREL))
10764 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
10765 else if (indx == 0)
10766 {
10767 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
10768
10769 /* Write the .got section contents for the sake
10770 of prelink. */
10771 loc = got->contents + off;
10772 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
10773 loc);
10774 }
10775 else
10776 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
10777
10778 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
10779 {
10780 outrel.r_addend += relocation;
10781 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
10782 outrel.r_addend -= htab->elf.tls_sec->vma;
10783 }
10784 loc = relgot->contents;
10785 loc += (relgot->reloc_count++
10786 * sizeof (Elf64_External_Rela));
10787 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
10788 }
10789
10790 /* Init the .got section contents here if we're not
10791 emitting a reloc. */
10792 else
10793 {
10794 relocation += addend;
10795 if (tls_type == (TLS_TLS | TLS_LD))
10796 relocation = 1;
10797 else if (tls_type != 0)
10798 {
10799 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
10800 if (tls_type == (TLS_TLS | TLS_TPREL))
10801 relocation += DTP_OFFSET - TP_OFFSET;
10802
10803 if (tls_type == (TLS_TLS | TLS_GD))
10804 {
10805 bfd_put_64 (output_bfd, relocation,
10806 got->contents + off + 8);
10807 relocation = 1;
10808 }
10809 }
10810
10811 bfd_put_64 (output_bfd, relocation,
10812 got->contents + off);
10813 }
10814 }
10815
10816 if (off >= (bfd_vma) -2)
10817 abort ();
10818
10819 relocation = got->output_offset + off;
10820
10821 /* TOC base (r2) is TOC start plus 0x8000. */
10822 addend = -TOC_BASE_OFF;
10823 }
10824 break;
10825
10826 case R_PPC64_PLT16_HA:
10827 case R_PPC64_PLT16_HI:
10828 case R_PPC64_PLT16_LO:
10829 case R_PPC64_PLT32:
10830 case R_PPC64_PLT64:
10831 /* Relocation is to the entry for this symbol in the
10832 procedure linkage table. */
10833
10834 /* Resolve a PLT reloc against a local symbol directly,
10835 without using the procedure linkage table. */
10836 if (h == NULL)
10837 break;
10838
10839 /* It's possible that we didn't make a PLT entry for this
10840 symbol. This happens when statically linking PIC code,
10841 or when using -Bsymbolic. Go find a match if there is a
10842 PLT entry. */
10843 if (htab->plt != NULL)
10844 {
10845 struct plt_entry *ent;
10846 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
10847 if (ent->addend == orig_addend
10848 && ent->plt.offset != (bfd_vma) -1)
10849 {
10850 relocation = (htab->plt->output_section->vma
10851 + htab->plt->output_offset
10852 + ent->plt.offset);
10853 unresolved_reloc = FALSE;
10854 }
10855 }
10856 break;
10857
10858 case R_PPC64_TOC:
10859 /* Relocation value is TOC base. */
10860 relocation = TOCstart;
10861 if (r_symndx == 0)
10862 relocation += htab->stub_group[input_section->id].toc_off;
10863 else if (unresolved_reloc)
10864 ;
10865 else if (sec != NULL && sec->id <= htab->top_id)
10866 relocation += htab->stub_group[sec->id].toc_off;
10867 else
10868 unresolved_reloc = TRUE;
10869 goto dodyn;
10870
10871 /* TOC16 relocs. We want the offset relative to the TOC base,
10872 which is the address of the start of the TOC plus 0x8000.
10873 The TOC consists of sections .got, .toc, .tocbss, and .plt,
10874 in this order. */
10875 case R_PPC64_TOC16:
10876 case R_PPC64_TOC16_LO:
10877 case R_PPC64_TOC16_HI:
10878 case R_PPC64_TOC16_DS:
10879 case R_PPC64_TOC16_LO_DS:
10880 case R_PPC64_TOC16_HA:
10881 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
10882 break;
10883
10884 /* Relocate against the beginning of the section. */
10885 case R_PPC64_SECTOFF:
10886 case R_PPC64_SECTOFF_LO:
10887 case R_PPC64_SECTOFF_HI:
10888 case R_PPC64_SECTOFF_DS:
10889 case R_PPC64_SECTOFF_LO_DS:
10890 case R_PPC64_SECTOFF_HA:
10891 if (sec != NULL)
10892 addend -= sec->output_section->vma;
10893 break;
10894
10895 case R_PPC64_REL14:
10896 case R_PPC64_REL14_BRNTAKEN:
10897 case R_PPC64_REL14_BRTAKEN:
10898 case R_PPC64_REL24:
10899 break;
10900
10901 case R_PPC64_TPREL16:
10902 case R_PPC64_TPREL16_LO:
10903 case R_PPC64_TPREL16_HI:
10904 case R_PPC64_TPREL16_HA:
10905 case R_PPC64_TPREL16_DS:
10906 case R_PPC64_TPREL16_LO_DS:
10907 case R_PPC64_TPREL16_HIGHER:
10908 case R_PPC64_TPREL16_HIGHERA:
10909 case R_PPC64_TPREL16_HIGHEST:
10910 case R_PPC64_TPREL16_HIGHESTA:
10911 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10912 if (info->shared)
10913 /* The TPREL16 relocs shouldn't really be used in shared
10914 libs as they will result in DT_TEXTREL being set, but
10915 support them anyway. */
10916 goto dodyn;
10917 break;
10918
10919 case R_PPC64_DTPREL16:
10920 case R_PPC64_DTPREL16_LO:
10921 case R_PPC64_DTPREL16_HI:
10922 case R_PPC64_DTPREL16_HA:
10923 case R_PPC64_DTPREL16_DS:
10924 case R_PPC64_DTPREL16_LO_DS:
10925 case R_PPC64_DTPREL16_HIGHER:
10926 case R_PPC64_DTPREL16_HIGHERA:
10927 case R_PPC64_DTPREL16_HIGHEST:
10928 case R_PPC64_DTPREL16_HIGHESTA:
10929 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10930 break;
10931
10932 case R_PPC64_DTPMOD64:
10933 relocation = 1;
10934 addend = 0;
10935 goto dodyn;
10936
10937 case R_PPC64_TPREL64:
10938 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
10939 goto dodyn;
10940
10941 case R_PPC64_DTPREL64:
10942 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
10943 /* Fall thru */
10944
10945 /* Relocations that may need to be propagated if this is a
10946 dynamic object. */
10947 case R_PPC64_REL30:
10948 case R_PPC64_REL32:
10949 case R_PPC64_REL64:
10950 case R_PPC64_ADDR14:
10951 case R_PPC64_ADDR14_BRNTAKEN:
10952 case R_PPC64_ADDR14_BRTAKEN:
10953 case R_PPC64_ADDR16:
10954 case R_PPC64_ADDR16_DS:
10955 case R_PPC64_ADDR16_HA:
10956 case R_PPC64_ADDR16_HI:
10957 case R_PPC64_ADDR16_HIGHER:
10958 case R_PPC64_ADDR16_HIGHERA:
10959 case R_PPC64_ADDR16_HIGHEST:
10960 case R_PPC64_ADDR16_HIGHESTA:
10961 case R_PPC64_ADDR16_LO:
10962 case R_PPC64_ADDR16_LO_DS:
10963 case R_PPC64_ADDR24:
10964 case R_PPC64_ADDR32:
10965 case R_PPC64_ADDR64:
10966 case R_PPC64_UADDR16:
10967 case R_PPC64_UADDR32:
10968 case R_PPC64_UADDR64:
10969 dodyn:
10970 if ((input_section->flags & SEC_ALLOC) == 0)
10971 break;
10972
10973 if (NO_OPD_RELOCS && is_opd)
10974 break;
10975
10976 if ((info->shared
10977 && (h == NULL
10978 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
10979 || h->elf.root.type != bfd_link_hash_undefweak)
10980 && (MUST_BE_DYN_RELOC (r_type)
10981 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
10982 || (ELIMINATE_COPY_RELOCS
10983 && !info->shared
10984 && h != NULL
10985 && h->elf.dynindx != -1
10986 && !h->elf.non_got_ref
10987 && h->elf.def_dynamic
10988 && !h->elf.def_regular))
10989 {
10990 Elf_Internal_Rela outrel;
10991 bfd_boolean skip, relocate;
10992 asection *sreloc;
10993 bfd_byte *loc;
10994 bfd_vma out_off;
10995
10996 /* When generating a dynamic object, these relocations
10997 are copied into the output file to be resolved at run
10998 time. */
10999
11000 skip = FALSE;
11001 relocate = FALSE;
11002
11003 out_off = _bfd_elf_section_offset (output_bfd, info,
11004 input_section, rel->r_offset);
11005 if (out_off == (bfd_vma) -1)
11006 skip = TRUE;
11007 else if (out_off == (bfd_vma) -2)
11008 skip = TRUE, relocate = TRUE;
11009 out_off += (input_section->output_section->vma
11010 + input_section->output_offset);
11011 outrel.r_offset = out_off;
11012 outrel.r_addend = rel->r_addend;
11013
11014 /* Optimize unaligned reloc use. */
11015 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11016 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11017 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11018 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11019 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11020 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11021 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11022 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11023 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11024
11025 if (skip)
11026 memset (&outrel, 0, sizeof outrel);
11027 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11028 && !is_opd
11029 && r_type != R_PPC64_TOC)
11030 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11031 else
11032 {
11033 /* This symbol is local, or marked to become local,
11034 or this is an opd section reloc which must point
11035 at a local function. */
11036 outrel.r_addend += relocation;
11037 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11038 {
11039 if (is_opd && h != NULL)
11040 {
11041 /* Lie about opd entries. This case occurs
11042 when building shared libraries and we
11043 reference a function in another shared
11044 lib. The same thing happens for a weak
11045 definition in an application that's
11046 overridden by a strong definition in a
11047 shared lib. (I believe this is a generic
11048 bug in binutils handling of weak syms.)
11049 In these cases we won't use the opd
11050 entry in this lib. */
11051 unresolved_reloc = FALSE;
11052 }
11053 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11054
11055 /* We need to relocate .opd contents for ld.so.
11056 Prelink also wants simple and consistent rules
11057 for relocs. This make all RELATIVE relocs have
11058 *r_offset equal to r_addend. */
11059 relocate = TRUE;
11060 }
11061 else
11062 {
11063 long indx = 0;
11064
11065 if (bfd_is_abs_section (sec))
11066 ;
11067 else if (sec == NULL || sec->owner == NULL)
11068 {
11069 bfd_set_error (bfd_error_bad_value);
11070 return FALSE;
11071 }
11072 else
11073 {
11074 asection *osec;
11075
11076 osec = sec->output_section;
11077 indx = elf_section_data (osec)->dynindx;
11078
11079 if (indx == 0)
11080 {
11081 if ((osec->flags & SEC_READONLY) == 0
11082 && htab->elf.data_index_section != NULL)
11083 osec = htab->elf.data_index_section;
11084 else
11085 osec = htab->elf.text_index_section;
11086 indx = elf_section_data (osec)->dynindx;
11087 }
11088 BFD_ASSERT (indx != 0);
11089
11090 /* We are turning this relocation into one
11091 against a section symbol, so subtract out
11092 the output section's address but not the
11093 offset of the input section in the output
11094 section. */
11095 outrel.r_addend -= osec->vma;
11096 }
11097
11098 outrel.r_info = ELF64_R_INFO (indx, r_type);
11099 }
11100 }
11101
11102 sreloc = elf_section_data (input_section)->sreloc;
11103 if (sreloc == NULL)
11104 abort ();
11105
11106 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11107 >= sreloc->size)
11108 abort ();
11109 loc = sreloc->contents;
11110 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11111 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11112
11113 /* If this reloc is against an external symbol, it will
11114 be computed at runtime, so there's no need to do
11115 anything now. However, for the sake of prelink ensure
11116 that the section contents are a known value. */
11117 if (! relocate)
11118 {
11119 unresolved_reloc = FALSE;
11120 /* The value chosen here is quite arbitrary as ld.so
11121 ignores section contents except for the special
11122 case of .opd where the contents might be accessed
11123 before relocation. Choose zero, as that won't
11124 cause reloc overflow. */
11125 relocation = 0;
11126 addend = 0;
11127 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11128 to improve backward compatibility with older
11129 versions of ld. */
11130 if (r_type == R_PPC64_ADDR64)
11131 addend = outrel.r_addend;
11132 /* Adjust pc_relative relocs to have zero in *r_offset. */
11133 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11134 addend = (input_section->output_section->vma
11135 + input_section->output_offset
11136 + rel->r_offset);
11137 }
11138 }
11139 break;
11140
11141 case R_PPC64_COPY:
11142 case R_PPC64_GLOB_DAT:
11143 case R_PPC64_JMP_SLOT:
11144 case R_PPC64_RELATIVE:
11145 /* We shouldn't ever see these dynamic relocs in relocatable
11146 files. */
11147 /* Fall through. */
11148
11149 case R_PPC64_PLTGOT16:
11150 case R_PPC64_PLTGOT16_DS:
11151 case R_PPC64_PLTGOT16_HA:
11152 case R_PPC64_PLTGOT16_HI:
11153 case R_PPC64_PLTGOT16_LO:
11154 case R_PPC64_PLTGOT16_LO_DS:
11155 case R_PPC64_PLTREL32:
11156 case R_PPC64_PLTREL64:
11157 /* These ones haven't been implemented yet. */
11158
11159 (*_bfd_error_handler)
11160 (_("%B: relocation %s is not supported for symbol %s."),
11161 input_bfd,
11162 ppc64_elf_howto_table[r_type]->name, sym_name);
11163
11164 bfd_set_error (bfd_error_invalid_operation);
11165 ret = FALSE;
11166 continue;
11167 }
11168
11169 /* Do any further special processing. */
11170 switch (r_type)
11171 {
11172 default:
11173 break;
11174
11175 case R_PPC64_ADDR16_HA:
11176 case R_PPC64_ADDR16_HIGHERA:
11177 case R_PPC64_ADDR16_HIGHESTA:
11178 case R_PPC64_TOC16_HA:
11179 case R_PPC64_SECTOFF_HA:
11180 case R_PPC64_TPREL16_HA:
11181 case R_PPC64_DTPREL16_HA:
11182 case R_PPC64_TPREL16_HIGHER:
11183 case R_PPC64_TPREL16_HIGHERA:
11184 case R_PPC64_TPREL16_HIGHEST:
11185 case R_PPC64_TPREL16_HIGHESTA:
11186 case R_PPC64_DTPREL16_HIGHER:
11187 case R_PPC64_DTPREL16_HIGHERA:
11188 case R_PPC64_DTPREL16_HIGHEST:
11189 case R_PPC64_DTPREL16_HIGHESTA:
11190 /* It's just possible that this symbol is a weak symbol
11191 that's not actually defined anywhere. In that case,
11192 'sec' would be NULL, and we should leave the symbol
11193 alone (it will be set to zero elsewhere in the link). */
11194 if (sec == NULL)
11195 break;
11196 /* Fall thru */
11197
11198 case R_PPC64_GOT16_HA:
11199 case R_PPC64_PLTGOT16_HA:
11200 case R_PPC64_PLT16_HA:
11201 case R_PPC64_GOT_TLSGD16_HA:
11202 case R_PPC64_GOT_TLSLD16_HA:
11203 case R_PPC64_GOT_TPREL16_HA:
11204 case R_PPC64_GOT_DTPREL16_HA:
11205 /* Add 0x10000 if sign bit in 0:15 is set.
11206 Bits 0:15 are not used. */
11207 addend += 0x8000;
11208 break;
11209
11210 case R_PPC64_ADDR16_DS:
11211 case R_PPC64_ADDR16_LO_DS:
11212 case R_PPC64_GOT16_DS:
11213 case R_PPC64_GOT16_LO_DS:
11214 case R_PPC64_PLT16_LO_DS:
11215 case R_PPC64_SECTOFF_DS:
11216 case R_PPC64_SECTOFF_LO_DS:
11217 case R_PPC64_TOC16_DS:
11218 case R_PPC64_TOC16_LO_DS:
11219 case R_PPC64_PLTGOT16_DS:
11220 case R_PPC64_PLTGOT16_LO_DS:
11221 case R_PPC64_GOT_TPREL16_DS:
11222 case R_PPC64_GOT_TPREL16_LO_DS:
11223 case R_PPC64_GOT_DTPREL16_DS:
11224 case R_PPC64_GOT_DTPREL16_LO_DS:
11225 case R_PPC64_TPREL16_DS:
11226 case R_PPC64_TPREL16_LO_DS:
11227 case R_PPC64_DTPREL16_DS:
11228 case R_PPC64_DTPREL16_LO_DS:
11229 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11230 mask = 3;
11231 /* If this reloc is against an lq insn, then the value must be
11232 a multiple of 16. This is somewhat of a hack, but the
11233 "correct" way to do this by defining _DQ forms of all the
11234 _DS relocs bloats all reloc switches in this file. It
11235 doesn't seem to make much sense to use any of these relocs
11236 in data, so testing the insn should be safe. */
11237 if ((insn & (0x3f << 26)) == (56u << 26))
11238 mask = 15;
11239 if (((relocation + addend) & mask) != 0)
11240 {
11241 (*_bfd_error_handler)
11242 (_("%B: error: relocation %s not a multiple of %d"),
11243 input_bfd,
11244 ppc64_elf_howto_table[r_type]->name,
11245 mask + 1);
11246 bfd_set_error (bfd_error_bad_value);
11247 ret = FALSE;
11248 continue;
11249 }
11250 break;
11251 }
11252
11253 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11254 because such sections are not SEC_ALLOC and thus ld.so will
11255 not process them. */
11256 if (unresolved_reloc
11257 && !((input_section->flags & SEC_DEBUGGING) != 0
11258 && h->elf.def_dynamic))
11259 {
11260 (*_bfd_error_handler)
11261 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11262 input_bfd,
11263 input_section,
11264 (long) rel->r_offset,
11265 ppc64_elf_howto_table[(int) r_type]->name,
11266 h->elf.root.root.string);
11267 ret = FALSE;
11268 }
11269
11270 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11271 input_bfd,
11272 input_section,
11273 contents,
11274 rel->r_offset,
11275 relocation,
11276 addend);
11277
11278 if (r != bfd_reloc_ok)
11279 {
11280 if (sym_name == NULL)
11281 sym_name = "(null)";
11282 if (r == bfd_reloc_overflow)
11283 {
11284 if (warned)
11285 continue;
11286 if (h != NULL
11287 && h->elf.root.type == bfd_link_hash_undefweak
11288 && ppc64_elf_howto_table[r_type]->pc_relative)
11289 {
11290 /* Assume this is a call protected by other code that
11291 detects the symbol is undefined. If this is the case,
11292 we can safely ignore the overflow. If not, the
11293 program is hosed anyway, and a little warning isn't
11294 going to help. */
11295
11296 continue;
11297 }
11298
11299 if (!((*info->callbacks->reloc_overflow)
11300 (info, (h ? &h->elf.root : NULL), sym_name,
11301 ppc64_elf_howto_table[r_type]->name,
11302 orig_addend, input_bfd, input_section, rel->r_offset)))
11303 return FALSE;
11304 }
11305 else
11306 {
11307 (*_bfd_error_handler)
11308 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11309 input_bfd,
11310 input_section,
11311 (long) rel->r_offset,
11312 ppc64_elf_howto_table[r_type]->name,
11313 sym_name,
11314 (int) r);
11315 ret = FALSE;
11316 }
11317 }
11318 }
11319
11320 /* If we're emitting relocations, then shortly after this function
11321 returns, reloc offsets and addends for this section will be
11322 adjusted. Worse, reloc symbol indices will be for the output
11323 file rather than the input. Save a copy of the relocs for
11324 opd_entry_value. */
11325 if (is_opd && (info->emitrelocations || info->relocatable))
11326 {
11327 bfd_size_type amt;
11328 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11329 rel = bfd_alloc (input_bfd, amt);
11330 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11331 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11332 if (rel == NULL)
11333 return FALSE;
11334 memcpy (rel, relocs, amt);
11335 }
11336 return ret;
11337 }
11338
11339 /* Adjust the value of any local symbols in opd sections. */
11340
11341 static bfd_boolean
11342 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11343 const char *name ATTRIBUTE_UNUSED,
11344 Elf_Internal_Sym *elfsym,
11345 asection *input_sec,
11346 struct elf_link_hash_entry *h)
11347 {
11348 struct _opd_sec_data *opd;
11349 long adjust;
11350 bfd_vma value;
11351
11352 if (h != NULL)
11353 return TRUE;
11354
11355 opd = get_opd_info (input_sec);
11356 if (opd == NULL || opd->adjust == NULL)
11357 return TRUE;
11358
11359 value = elfsym->st_value - input_sec->output_offset;
11360 if (!info->relocatable)
11361 value -= input_sec->output_section->vma;
11362
11363 adjust = opd->adjust[value / 8];
11364 if (adjust == -1)
11365 elfsym->st_value = 0;
11366 else
11367 elfsym->st_value += adjust;
11368 return TRUE;
11369 }
11370
11371 /* Finish up dynamic symbol handling. We set the contents of various
11372 dynamic sections here. */
11373
11374 static bfd_boolean
11375 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11376 struct bfd_link_info *info,
11377 struct elf_link_hash_entry *h,
11378 Elf_Internal_Sym *sym)
11379 {
11380 struct ppc_link_hash_table *htab;
11381 struct plt_entry *ent;
11382 Elf_Internal_Rela rela;
11383 bfd_byte *loc;
11384
11385 htab = ppc_hash_table (info);
11386
11387 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11388 if (ent->plt.offset != (bfd_vma) -1)
11389 {
11390 /* This symbol has an entry in the procedure linkage
11391 table. Set it up. */
11392
11393 if (htab->plt == NULL
11394 || htab->relplt == NULL
11395 || htab->glink == NULL)
11396 abort ();
11397
11398 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11399 fill in the PLT entry. */
11400 rela.r_offset = (htab->plt->output_section->vma
11401 + htab->plt->output_offset
11402 + ent->plt.offset);
11403 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11404 rela.r_addend = ent->addend;
11405
11406 loc = htab->relplt->contents;
11407 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11408 * sizeof (Elf64_External_Rela));
11409 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11410 }
11411
11412 if (h->needs_copy)
11413 {
11414 Elf_Internal_Rela rela;
11415 bfd_byte *loc;
11416
11417 /* This symbol needs a copy reloc. Set it up. */
11418
11419 if (h->dynindx == -1
11420 || (h->root.type != bfd_link_hash_defined
11421 && h->root.type != bfd_link_hash_defweak)
11422 || htab->relbss == NULL)
11423 abort ();
11424
11425 rela.r_offset = (h->root.u.def.value
11426 + h->root.u.def.section->output_section->vma
11427 + h->root.u.def.section->output_offset);
11428 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11429 rela.r_addend = 0;
11430 loc = htab->relbss->contents;
11431 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11432 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11433 }
11434
11435 /* Mark some specially defined symbols as absolute. */
11436 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11437 sym->st_shndx = SHN_ABS;
11438
11439 return TRUE;
11440 }
11441
11442 /* Used to decide how to sort relocs in an optimal manner for the
11443 dynamic linker, before writing them out. */
11444
11445 static enum elf_reloc_type_class
11446 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11447 {
11448 enum elf_ppc64_reloc_type r_type;
11449
11450 r_type = ELF64_R_TYPE (rela->r_info);
11451 switch (r_type)
11452 {
11453 case R_PPC64_RELATIVE:
11454 return reloc_class_relative;
11455 case R_PPC64_JMP_SLOT:
11456 return reloc_class_plt;
11457 case R_PPC64_COPY:
11458 return reloc_class_copy;
11459 default:
11460 return reloc_class_normal;
11461 }
11462 }
11463
11464 /* Finish up the dynamic sections. */
11465
11466 static bfd_boolean
11467 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11468 struct bfd_link_info *info)
11469 {
11470 struct ppc_link_hash_table *htab;
11471 bfd *dynobj;
11472 asection *sdyn;
11473
11474 htab = ppc_hash_table (info);
11475 dynobj = htab->elf.dynobj;
11476 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11477
11478 if (htab->elf.dynamic_sections_created)
11479 {
11480 Elf64_External_Dyn *dyncon, *dynconend;
11481
11482 if (sdyn == NULL || htab->got == NULL)
11483 abort ();
11484
11485 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11486 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11487 for (; dyncon < dynconend; dyncon++)
11488 {
11489 Elf_Internal_Dyn dyn;
11490 asection *s;
11491
11492 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11493
11494 switch (dyn.d_tag)
11495 {
11496 default:
11497 continue;
11498
11499 case DT_PPC64_GLINK:
11500 s = htab->glink;
11501 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11502 /* We stupidly defined DT_PPC64_GLINK to be the start
11503 of glink rather than the first entry point, which is
11504 what ld.so needs, and now have a bigger stub to
11505 support automatic multiple TOCs. */
11506 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11507 break;
11508
11509 case DT_PPC64_OPD:
11510 s = bfd_get_section_by_name (output_bfd, ".opd");
11511 if (s == NULL)
11512 continue;
11513 dyn.d_un.d_ptr = s->vma;
11514 break;
11515
11516 case DT_PPC64_OPDSZ:
11517 s = bfd_get_section_by_name (output_bfd, ".opd");
11518 if (s == NULL)
11519 continue;
11520 dyn.d_un.d_val = s->size;
11521 break;
11522
11523 case DT_PLTGOT:
11524 s = htab->plt;
11525 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11526 break;
11527
11528 case DT_JMPREL:
11529 s = htab->relplt;
11530 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11531 break;
11532
11533 case DT_PLTRELSZ:
11534 dyn.d_un.d_val = htab->relplt->size;
11535 break;
11536
11537 case DT_RELASZ:
11538 /* Don't count procedure linkage table relocs in the
11539 overall reloc count. */
11540 s = htab->relplt;
11541 if (s == NULL)
11542 continue;
11543 dyn.d_un.d_val -= s->size;
11544 break;
11545
11546 case DT_RELA:
11547 /* We may not be using the standard ELF linker script.
11548 If .rela.plt is the first .rela section, we adjust
11549 DT_RELA to not include it. */
11550 s = htab->relplt;
11551 if (s == NULL)
11552 continue;
11553 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11554 continue;
11555 dyn.d_un.d_ptr += s->size;
11556 break;
11557 }
11558
11559 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11560 }
11561 }
11562
11563 if (htab->got != NULL && htab->got->size != 0)
11564 {
11565 /* Fill in the first entry in the global offset table.
11566 We use it to hold the link-time TOCbase. */
11567 bfd_put_64 (output_bfd,
11568 elf_gp (output_bfd) + TOC_BASE_OFF,
11569 htab->got->contents);
11570
11571 /* Set .got entry size. */
11572 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11573 }
11574
11575 if (htab->plt != NULL && htab->plt->size != 0)
11576 {
11577 /* Set .plt entry size. */
11578 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11579 = PLT_ENTRY_SIZE;
11580 }
11581
11582 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11583 brlt ourselves if emitrelocations. */
11584 if (htab->brlt != NULL
11585 && htab->brlt->reloc_count != 0
11586 && !_bfd_elf_link_output_relocs (output_bfd,
11587 htab->brlt,
11588 &elf_section_data (htab->brlt)->rel_hdr,
11589 elf_section_data (htab->brlt)->relocs,
11590 NULL))
11591 return FALSE;
11592
11593 /* We need to handle writing out multiple GOT sections ourselves,
11594 since we didn't add them to DYNOBJ. We know dynobj is the first
11595 bfd. */
11596 while ((dynobj = dynobj->link_next) != NULL)
11597 {
11598 asection *s;
11599
11600 if (!is_ppc64_elf_target (dynobj->xvec))
11601 continue;
11602
11603 s = ppc64_elf_tdata (dynobj)->got;
11604 if (s != NULL
11605 && s->size != 0
11606 && s->output_section != bfd_abs_section_ptr
11607 && !bfd_set_section_contents (output_bfd, s->output_section,
11608 s->contents, s->output_offset,
11609 s->size))
11610 return FALSE;
11611 s = ppc64_elf_tdata (dynobj)->relgot;
11612 if (s != NULL
11613 && s->size != 0
11614 && s->output_section != bfd_abs_section_ptr
11615 && !bfd_set_section_contents (output_bfd, s->output_section,
11616 s->contents, s->output_offset,
11617 s->size))
11618 return FALSE;
11619 }
11620
11621 return TRUE;
11622 }
11623
11624 #include "elf64-target.h"
GDB Binutils - Deliverables
This page took 0.31447 seconds and 4 git commands to generate.