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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011 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.
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 #include "dwarf2.h"
38
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *);
59
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_default_execstack 0
80
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
90
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
111 #define elf_backend_action_discarded ppc64_elf_action_discarded
112 #define elf_backend_relocate_section ppc64_elf_relocate_section
113 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
114 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
115 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
116 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
117 #define elf_backend_special_sections ppc64_elf_special_sections
118 #define elf_backend_post_process_headers _bfd_elf_set_osabi
119
120 /* The name of the dynamic interpreter. This is put in the .interp
121 section. */
122 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
123
124 /* The size in bytes of an entry in the procedure linkage table. */
125 #define PLT_ENTRY_SIZE 24
126
127 /* The initial size of the plt reserved for the dynamic linker. */
128 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
129
130 /* TOC base pointers offset from start of TOC. */
131 #define TOC_BASE_OFF 0x8000
132
133 /* Offset of tp and dtp pointers from start of TLS block. */
134 #define TP_OFFSET 0x7000
135 #define DTP_OFFSET 0x8000
136
137 /* .plt call stub instructions. The normal stub is like this, but
138 sometimes the .plt entry crosses a 64k boundary and we need to
139 insert an addi to adjust r12. */
140 #define PLT_CALL_STUB_SIZE (7*4)
141 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
142 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
143 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
144 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
145 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
146 /* ld %r11,xxx+16@l(%r12) */
147 #define BCTR 0x4e800420 /* bctr */
148
149
150 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
151 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
152 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
153 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
154
155 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
156 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
157
158 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
159
160 /* glink call stub instructions. We enter with the index in R0. */
161 #define GLINK_CALL_STUB_SIZE (16*4)
162 /* 0: */
163 /* .quad plt0-1f */
164 /* __glink: */
165 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
166 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
167 /* 1: */
168 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
169 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
170 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
171 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
172 /* ld %11,0(%12) */
173 /* ld %2,8(%12) */
174 /* mtctr %11 */
175 /* ld %11,16(%12) */
176 /* bctr */
177
178 /* Pad with this. */
179 #define NOP 0x60000000
180
181 /* Some other nops. */
182 #define CROR_151515 0x4def7b82
183 #define CROR_313131 0x4ffffb82
184
185 /* .glink entries for the first 32k functions are two instructions. */
186 #define LI_R0_0 0x38000000 /* li %r0,0 */
187 #define B_DOT 0x48000000 /* b . */
188
189 /* After that, we need two instructions to load the index, followed by
190 a branch. */
191 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
192 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
193
194 /* Instructions used by the save and restore reg functions. */
195 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
196 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
197 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
198 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
199 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
200 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
201 #define LI_R12_0 0x39800000 /* li %r12,0 */
202 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
203 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
204 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
205 #define BLR 0x4e800020 /* blr */
206
207 /* Since .opd is an array of descriptors and each entry will end up
208 with identical R_PPC64_RELATIVE relocs, there is really no need to
209 propagate .opd relocs; The dynamic linker should be taught to
210 relocate .opd without reloc entries. */
211 #ifndef NO_OPD_RELOCS
212 #define NO_OPD_RELOCS 0
213 #endif
214 \f
215 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
216
217 /* Relocation HOWTO's. */
218 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
219
220 static reloc_howto_type ppc64_elf_howto_raw[] = {
221 /* This reloc does nothing. */
222 HOWTO (R_PPC64_NONE, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 32, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_NONE", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 32 bit relocation. */
237 HOWTO (R_PPC64_ADDR32, /* type */
238 0, /* rightshift */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
240 32, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR32", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffffffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* An absolute 26 bit branch; the lower two bits must be zero.
252 FIXME: we don't check that, we just clear them. */
253 HOWTO (R_PPC64_ADDR24, /* type */
254 0, /* rightshift */
255 2, /* size (0 = byte, 1 = short, 2 = long) */
256 26, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_bitfield, /* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_PPC64_ADDR24", /* name */
262 FALSE, /* partial_inplace */
263 0, /* src_mask */
264 0x03fffffc, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* A standard 16 bit relocation. */
268 HOWTO (R_PPC64_ADDR16, /* type */
269 0, /* rightshift */
270 1, /* size (0 = byte, 1 = short, 2 = long) */
271 16, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_bitfield, /* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_PPC64_ADDR16", /* name */
277 FALSE, /* partial_inplace */
278 0, /* src_mask */
279 0xffff, /* dst_mask */
280 FALSE), /* pcrel_offset */
281
282 /* A 16 bit relocation without overflow. */
283 HOWTO (R_PPC64_ADDR16_LO, /* type */
284 0, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_PPC64_ADDR16_LO", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* Bits 16-31 of an address. */
298 HOWTO (R_PPC64_ADDR16_HI, /* type */
299 16, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_dont, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_PPC64_ADDR16_HI", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
313 bits, treated as a signed number, is negative. */
314 HOWTO (R_PPC64_ADDR16_HA, /* type */
315 16, /* rightshift */
316 1, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_dont, /* complain_on_overflow */
321 ppc64_elf_ha_reloc, /* special_function */
322 "R_PPC64_ADDR16_HA", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0xffff, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* An absolute 16 bit branch; the lower two bits must be zero.
329 FIXME: we don't check that, we just clear them. */
330 HOWTO (R_PPC64_ADDR14, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_branch_reloc, /* special_function */
338 "R_PPC64_ADDR14", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is expected to be taken. The lower two
346 bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* An absolute 16 bit branch, for which bit 10 should be set to
362 indicate that the branch is not expected to be taken. The lower
363 two bits must be zero. */
364 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
365 0, /* rightshift */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
367 16, /* bitsize */
368 FALSE, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_bitfield, /* complain_on_overflow */
371 ppc64_elf_brtaken_reloc, /* special_function */
372 "R_PPC64_ADDR14_BRNTAKEN",/* name */
373 FALSE, /* partial_inplace */
374 0, /* src_mask */
375 0x0000fffc, /* dst_mask */
376 FALSE), /* pcrel_offset */
377
378 /* A relative 26 bit branch; the lower two bits must be zero. */
379 HOWTO (R_PPC64_REL24, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 26, /* bitsize */
383 TRUE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_signed, /* complain_on_overflow */
386 ppc64_elf_branch_reloc, /* special_function */
387 "R_PPC64_REL24", /* name */
388 FALSE, /* partial_inplace */
389 0, /* src_mask */
390 0x03fffffc, /* dst_mask */
391 TRUE), /* pcrel_offset */
392
393 /* A relative 16 bit branch; the lower two bits must be zero. */
394 HOWTO (R_PPC64_REL14, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_branch_reloc, /* special_function */
402 "R_PPC64_REL14", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is expected to be taken. The lower two bits must be
410 zero. */
411 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRTAKEN", /* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* A relative 16 bit branch. Bit 10 should be set to indicate that
426 the branch is not expected to be taken. The lower two bits must
427 be zero. */
428 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
429 0, /* rightshift */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 TRUE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_signed, /* complain_on_overflow */
435 ppc64_elf_brtaken_reloc, /* special_function */
436 "R_PPC64_REL14_BRNTAKEN",/* name */
437 FALSE, /* partial_inplace */
438 0, /* src_mask */
439 0x0000fffc, /* dst_mask */
440 TRUE), /* pcrel_offset */
441
442 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
443 symbol. */
444 HOWTO (R_PPC64_GOT16, /* type */
445 0, /* rightshift */
446 1, /* size (0 = byte, 1 = short, 2 = long) */
447 16, /* bitsize */
448 FALSE, /* pc_relative */
449 0, /* bitpos */
450 complain_overflow_signed, /* complain_on_overflow */
451 ppc64_elf_unhandled_reloc, /* special_function */
452 "R_PPC64_GOT16", /* name */
453 FALSE, /* partial_inplace */
454 0, /* src_mask */
455 0xffff, /* dst_mask */
456 FALSE), /* pcrel_offset */
457
458 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
459 the symbol. */
460 HOWTO (R_PPC64_GOT16_LO, /* type */
461 0, /* rightshift */
462 1, /* size (0 = byte, 1 = short, 2 = long) */
463 16, /* bitsize */
464 FALSE, /* pc_relative */
465 0, /* bitpos */
466 complain_overflow_dont, /* complain_on_overflow */
467 ppc64_elf_unhandled_reloc, /* special_function */
468 "R_PPC64_GOT16_LO", /* name */
469 FALSE, /* partial_inplace */
470 0, /* src_mask */
471 0xffff, /* dst_mask */
472 FALSE), /* pcrel_offset */
473
474 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
475 the symbol. */
476 HOWTO (R_PPC64_GOT16_HI, /* type */
477 16, /* rightshift */
478 1, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_dont,/* complain_on_overflow */
483 ppc64_elf_unhandled_reloc, /* special_function */
484 "R_PPC64_GOT16_HI", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xffff, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
491 the symbol. */
492 HOWTO (R_PPC64_GOT16_HA, /* type */
493 16, /* rightshift */
494 1, /* size (0 = byte, 1 = short, 2 = long) */
495 16, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont,/* complain_on_overflow */
499 ppc64_elf_unhandled_reloc, /* special_function */
500 "R_PPC64_GOT16_HA", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* This is used only by the dynamic linker. The symbol should exist
507 both in the object being run and in some shared library. The
508 dynamic linker copies the data addressed by the symbol from the
509 shared library into the object, because the object being
510 run has to have the data at some particular address. */
511 HOWTO (R_PPC64_COPY, /* type */
512 0, /* rightshift */
513 0, /* this one is variable size */
514 0, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont, /* complain_on_overflow */
518 ppc64_elf_unhandled_reloc, /* special_function */
519 "R_PPC64_COPY", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 0, /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Like R_PPC64_ADDR64, but used when setting global offset table
526 entries. */
527 HOWTO (R_PPC64_GLOB_DAT, /* type */
528 0, /* rightshift */
529 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
530 64, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 ppc64_elf_unhandled_reloc, /* special_function */
535 "R_PPC64_GLOB_DAT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 ONES (64), /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Created by the link editor. Marks a procedure linkage table
542 entry for a symbol. */
543 HOWTO (R_PPC64_JMP_SLOT, /* type */
544 0, /* rightshift */
545 0, /* size (0 = byte, 1 = short, 2 = long) */
546 0, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 ppc64_elf_unhandled_reloc, /* special_function */
551 "R_PPC64_JMP_SLOT", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 0, /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Used only by the dynamic linker. When the object is run, this
558 doubleword64 is set to the load address of the object, plus the
559 addend. */
560 HOWTO (R_PPC64_RELATIVE, /* type */
561 0, /* rightshift */
562 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
563 64, /* bitsize */
564 FALSE, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_dont, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_PPC64_RELATIVE", /* name */
569 FALSE, /* partial_inplace */
570 0, /* src_mask */
571 ONES (64), /* dst_mask */
572 FALSE), /* pcrel_offset */
573
574 /* Like R_PPC64_ADDR32, but may be unaligned. */
575 HOWTO (R_PPC64_UADDR32, /* type */
576 0, /* rightshift */
577 2, /* size (0 = byte, 1 = short, 2 = long) */
578 32, /* bitsize */
579 FALSE, /* pc_relative */
580 0, /* bitpos */
581 complain_overflow_bitfield, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC64_UADDR32", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 FALSE), /* pcrel_offset */
588
589 /* Like R_PPC64_ADDR16, but may be unaligned. */
590 HOWTO (R_PPC64_UADDR16, /* type */
591 0, /* rightshift */
592 1, /* size (0 = byte, 1 = short, 2 = long) */
593 16, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_bitfield, /* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_PPC64_UADDR16", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* 32-bit PC relative. */
605 HOWTO (R_PPC64_REL32, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 32, /* bitsize */
609 TRUE, /* pc_relative */
610 0, /* bitpos */
611 /* FIXME: Verify. Was complain_overflow_bitfield. */
612 complain_overflow_signed, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC64_REL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* 32-bit relocation to the symbol's procedure linkage table. */
621 HOWTO (R_PPC64_PLT32, /* type */
622 0, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 32, /* bitsize */
625 FALSE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_bitfield, /* complain_on_overflow */
628 ppc64_elf_unhandled_reloc, /* special_function */
629 "R_PPC64_PLT32", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0xffffffff, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
636 FIXME: R_PPC64_PLTREL32 not supported. */
637 HOWTO (R_PPC64_PLTREL32, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 32, /* bitsize */
641 TRUE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_signed, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_PLTREL32", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffffffff, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
652 the symbol. */
653 HOWTO (R_PPC64_PLT16_LO, /* type */
654 0, /* rightshift */
655 1, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 ppc64_elf_unhandled_reloc, /* special_function */
661 "R_PPC64_PLT16_LO", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0xffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
668 the symbol. */
669 HOWTO (R_PPC64_PLT16_HI, /* type */
670 16, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_dont, /* complain_on_overflow */
676 ppc64_elf_unhandled_reloc, /* special_function */
677 "R_PPC64_PLT16_HI", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
684 the symbol. */
685 HOWTO (R_PPC64_PLT16_HA, /* type */
686 16, /* rightshift */
687 1, /* size (0 = byte, 1 = short, 2 = long) */
688 16, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_dont, /* complain_on_overflow */
692 ppc64_elf_unhandled_reloc, /* special_function */
693 "R_PPC64_PLT16_HA", /* name */
694 FALSE, /* partial_inplace */
695 0, /* src_mask */
696 0xffff, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 /* 16-bit section relative relocation. */
700 HOWTO (R_PPC64_SECTOFF, /* type */
701 0, /* rightshift */
702 1, /* size (0 = byte, 1 = short, 2 = long) */
703 16, /* bitsize */
704 FALSE, /* pc_relative */
705 0, /* bitpos */
706 complain_overflow_bitfield, /* complain_on_overflow */
707 ppc64_elf_sectoff_reloc, /* special_function */
708 "R_PPC64_SECTOFF", /* name */
709 FALSE, /* partial_inplace */
710 0, /* src_mask */
711 0xffff, /* dst_mask */
712 FALSE), /* pcrel_offset */
713
714 /* Like R_PPC64_SECTOFF, but no overflow warning. */
715 HOWTO (R_PPC64_SECTOFF_LO, /* type */
716 0, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_dont, /* complain_on_overflow */
722 ppc64_elf_sectoff_reloc, /* special_function */
723 "R_PPC64_SECTOFF_LO", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* 16-bit upper half section relative relocation. */
730 HOWTO (R_PPC64_SECTOFF_HI, /* type */
731 16, /* rightshift */
732 1, /* size (0 = byte, 1 = short, 2 = long) */
733 16, /* bitsize */
734 FALSE, /* pc_relative */
735 0, /* bitpos */
736 complain_overflow_dont, /* complain_on_overflow */
737 ppc64_elf_sectoff_reloc, /* special_function */
738 "R_PPC64_SECTOFF_HI", /* name */
739 FALSE, /* partial_inplace */
740 0, /* src_mask */
741 0xffff, /* dst_mask */
742 FALSE), /* pcrel_offset */
743
744 /* 16-bit upper half adjusted section relative relocation. */
745 HOWTO (R_PPC64_SECTOFF_HA, /* type */
746 16, /* rightshift */
747 1, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 FALSE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont, /* complain_on_overflow */
752 ppc64_elf_sectoff_ha_reloc, /* special_function */
753 "R_PPC64_SECTOFF_HA", /* name */
754 FALSE, /* partial_inplace */
755 0, /* src_mask */
756 0xffff, /* dst_mask */
757 FALSE), /* pcrel_offset */
758
759 /* Like R_PPC64_REL24 without touching the two least significant bits. */
760 HOWTO (R_PPC64_REL30, /* type */
761 2, /* rightshift */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
763 30, /* bitsize */
764 TRUE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_REL30", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 0xfffffffc, /* dst_mask */
772 TRUE), /* pcrel_offset */
773
774 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
775
776 /* A standard 64-bit relocation. */
777 HOWTO (R_PPC64_ADDR64, /* type */
778 0, /* rightshift */
779 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
780 64, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC64_ADDR64", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 ONES (64), /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 /* The bits 32-47 of an address. */
792 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
793 32, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHER", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 32-47 of an address, plus 1 if the contents of the low
807 16 bits, treated as a signed number, is negative. */
808 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
809 32, /* rightshift */
810 1, /* size (0 = byte, 1 = short, 2 = long) */
811 16, /* bitsize */
812 FALSE, /* pc_relative */
813 0, /* bitpos */
814 complain_overflow_dont, /* complain_on_overflow */
815 ppc64_elf_ha_reloc, /* special_function */
816 "R_PPC64_ADDR16_HIGHERA", /* name */
817 FALSE, /* partial_inplace */
818 0, /* src_mask */
819 0xffff, /* dst_mask */
820 FALSE), /* pcrel_offset */
821
822 /* The bits 48-63 of an address. */
823 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
824 48, /* rightshift */
825 1, /* size (0 = byte, 1 = short, 2 = long) */
826 16, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR16_HIGHEST", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 0xffff, /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 48-63 of an address, plus 1 if the contents of the low
838 16 bits, treated as a signed number, is negative. */
839 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
840 48, /* rightshift */
841 1, /* size (0 = byte, 1 = short, 2 = long) */
842 16, /* bitsize */
843 FALSE, /* pc_relative */
844 0, /* bitpos */
845 complain_overflow_dont, /* complain_on_overflow */
846 ppc64_elf_ha_reloc, /* special_function */
847 "R_PPC64_ADDR16_HIGHESTA", /* name */
848 FALSE, /* partial_inplace */
849 0, /* src_mask */
850 0xffff, /* dst_mask */
851 FALSE), /* pcrel_offset */
852
853 /* Like ADDR64, but may be unaligned. */
854 HOWTO (R_PPC64_UADDR64, /* type */
855 0, /* rightshift */
856 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
857 64, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 bfd_elf_generic_reloc, /* special_function */
862 "R_PPC64_UADDR64", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 ONES (64), /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* 64-bit relative relocation. */
869 HOWTO (R_PPC64_REL64, /* type */
870 0, /* rightshift */
871 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
872 64, /* bitsize */
873 TRUE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_REL64", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 ONES (64), /* dst_mask */
881 TRUE), /* pcrel_offset */
882
883 /* 64-bit relocation to the symbol's procedure linkage table. */
884 HOWTO (R_PPC64_PLT64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLT64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* 64-bit PC relative relocation to the symbol's procedure linkage
899 table. */
900 /* FIXME: R_PPC64_PLTREL64 not supported. */
901 HOWTO (R_PPC64_PLTREL64, /* type */
902 0, /* rightshift */
903 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
904 64, /* bitsize */
905 TRUE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_dont, /* complain_on_overflow */
908 ppc64_elf_unhandled_reloc, /* special_function */
909 "R_PPC64_PLTREL64", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 ONES (64), /* dst_mask */
913 TRUE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation. */
916
917 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
918 HOWTO (R_PPC64_TOC16, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_signed, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation without overflow. */
933
934 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_LO, /* type */
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_LO", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits. */
950
951 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
952 HOWTO (R_PPC64_TOC16_HI, /* type */
953 16, /* rightshift */
954 1, /* size (0 = byte, 1 = short, 2 = long) */
955 16, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_toc_reloc, /* special_function */
960 "R_PPC64_TOC16_HI", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
967 contents of the low 16 bits, treated as a signed number, is
968 negative. */
969
970 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
971 HOWTO (R_PPC64_TOC16_HA, /* type */
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc64_elf_toc_ha_reloc, /* special_function */
979 "R_PPC64_TOC16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 64-bit relocation; insert value of TOC base (.TOC.). */
986
987 /* R_PPC64_TOC 51 doubleword64 .TOC. */
988 HOWTO (R_PPC64_TOC, /* type */
989 0, /* rightshift */
990 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
991 64, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_bitfield, /* complain_on_overflow */
995 ppc64_elf_toc64_reloc, /* special_function */
996 "R_PPC64_TOC", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 ONES (64), /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like R_PPC64_GOT16, but also informs the link editor that the
1003 value to relocate may (!) refer to a PLT entry which the link
1004 editor (a) may replace with the symbol value. If the link editor
1005 is unable to fully resolve the symbol, it may (b) create a PLT
1006 entry and store the address to the new PLT entry in the GOT.
1007 This permits lazy resolution of function symbols at run time.
1008 The link editor may also skip all of this and just (c) emit a
1009 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1010 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1011 HOWTO (R_PPC64_PLTGOT16, /* type */
1012 0, /* rightshift */
1013 1, /* size (0 = byte, 1 = short, 2 = long) */
1014 16, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_signed, /* complain_on_overflow */
1018 ppc64_elf_unhandled_reloc, /* special_function */
1019 "R_PPC64_PLTGOT16", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 0xffff, /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* Like R_PPC64_PLTGOT16, but without overflow. */
1026 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1027 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1028 0, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc64_elf_unhandled_reloc, /* special_function */
1035 "R_PPC64_PLTGOT16_LO", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1042 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1043 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1044 16, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc64_elf_unhandled_reloc, /* special_function */
1051 "R_PPC64_PLTGOT16_HI", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1058 1 if the contents of the low 16 bits, treated as a signed number,
1059 is negative. */
1060 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1061 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1062 16, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_dont,/* complain_on_overflow */
1068 ppc64_elf_unhandled_reloc, /* special_function */
1069 "R_PPC64_PLTGOT16_HA", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1076 HOWTO (R_PPC64_ADDR16_DS, /* type */
1077 0, /* rightshift */
1078 1, /* size (0 = byte, 1 = short, 2 = long) */
1079 16, /* bitsize */
1080 FALSE, /* pc_relative */
1081 0, /* bitpos */
1082 complain_overflow_bitfield, /* complain_on_overflow */
1083 bfd_elf_generic_reloc, /* special_function */
1084 "R_PPC64_ADDR16_DS", /* name */
1085 FALSE, /* partial_inplace */
1086 0, /* src_mask */
1087 0xfffc, /* dst_mask */
1088 FALSE), /* pcrel_offset */
1089
1090 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1091 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1092 0, /* rightshift */
1093 1, /* size (0 = byte, 1 = short, 2 = long) */
1094 16, /* bitsize */
1095 FALSE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_dont,/* complain_on_overflow */
1098 bfd_elf_generic_reloc, /* special_function */
1099 "R_PPC64_ADDR16_LO_DS",/* name */
1100 FALSE, /* partial_inplace */
1101 0, /* src_mask */
1102 0xfffc, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1104
1105 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1106 HOWTO (R_PPC64_GOT16_DS, /* type */
1107 0, /* rightshift */
1108 1, /* size (0 = byte, 1 = short, 2 = long) */
1109 16, /* bitsize */
1110 FALSE, /* pc_relative */
1111 0, /* bitpos */
1112 complain_overflow_signed, /* complain_on_overflow */
1113 ppc64_elf_unhandled_reloc, /* special_function */
1114 "R_PPC64_GOT16_DS", /* name */
1115 FALSE, /* partial_inplace */
1116 0, /* src_mask */
1117 0xfffc, /* dst_mask */
1118 FALSE), /* pcrel_offset */
1119
1120 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1121 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_dont, /* complain_on_overflow */
1128 ppc64_elf_unhandled_reloc, /* special_function */
1129 "R_PPC64_GOT16_LO_DS", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xfffc, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1136 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc64_elf_unhandled_reloc, /* special_function */
1144 "R_PPC64_PLT16_LO_DS", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xfffc, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1151 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1152 0, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_bitfield, /* complain_on_overflow */
1158 ppc64_elf_sectoff_reloc, /* special_function */
1159 "R_PPC64_SECTOFF_DS", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xfffc, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1166 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1167 0, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc64_elf_sectoff_reloc, /* special_function */
1174 "R_PPC64_SECTOFF_LO_DS",/* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xfffc, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1181 HOWTO (R_PPC64_TOC16_DS, /* type */
1182 0, /* rightshift */
1183 1, /* size (0 = byte, 1 = short, 2 = long) */
1184 16, /* bitsize */
1185 FALSE, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_signed, /* complain_on_overflow */
1188 ppc64_elf_toc_reloc, /* special_function */
1189 "R_PPC64_TOC16_DS", /* name */
1190 FALSE, /* partial_inplace */
1191 0, /* src_mask */
1192 0xfffc, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1194
1195 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1196 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1197 0, /* rightshift */
1198 1, /* size (0 = byte, 1 = short, 2 = long) */
1199 16, /* bitsize */
1200 FALSE, /* pc_relative */
1201 0, /* bitpos */
1202 complain_overflow_dont, /* complain_on_overflow */
1203 ppc64_elf_toc_reloc, /* special_function */
1204 "R_PPC64_TOC16_LO_DS", /* name */
1205 FALSE, /* partial_inplace */
1206 0, /* src_mask */
1207 0xfffc, /* dst_mask */
1208 FALSE), /* pcrel_offset */
1209
1210 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1211 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1212 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_signed, /* complain_on_overflow */
1219 ppc64_elf_unhandled_reloc, /* special_function */
1220 "R_PPC64_PLTGOT16_DS", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1227 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1228 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1229 0, /* rightshift */
1230 1, /* size (0 = byte, 1 = short, 2 = long) */
1231 16, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc64_elf_unhandled_reloc, /* special_function */
1236 "R_PPC64_PLTGOT16_LO_DS",/* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0xfffc, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Marker relocs for TLS. */
1243 HOWTO (R_PPC64_TLS,
1244 0, /* rightshift */
1245 2, /* size (0 = byte, 1 = short, 2 = long) */
1246 32, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_dont, /* complain_on_overflow */
1250 bfd_elf_generic_reloc, /* special_function */
1251 "R_PPC64_TLS", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 0, /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 HOWTO (R_PPC64_TLSGD,
1258 0, /* rightshift */
1259 2, /* size (0 = byte, 1 = short, 2 = long) */
1260 32, /* bitsize */
1261 FALSE, /* pc_relative */
1262 0, /* bitpos */
1263 complain_overflow_dont, /* complain_on_overflow */
1264 bfd_elf_generic_reloc, /* special_function */
1265 "R_PPC64_TLSGD", /* name */
1266 FALSE, /* partial_inplace */
1267 0, /* src_mask */
1268 0, /* dst_mask */
1269 FALSE), /* pcrel_offset */
1270
1271 HOWTO (R_PPC64_TLSLD,
1272 0, /* rightshift */
1273 2, /* size (0 = byte, 1 = short, 2 = long) */
1274 32, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 bfd_elf_generic_reloc, /* special_function */
1279 "R_PPC64_TLSLD", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 0, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 HOWTO (R_PPC64_TOCSAVE,
1286 0, /* rightshift */
1287 2, /* size (0 = byte, 1 = short, 2 = long) */
1288 32, /* bitsize */
1289 FALSE, /* pc_relative */
1290 0, /* bitpos */
1291 complain_overflow_dont, /* complain_on_overflow */
1292 bfd_elf_generic_reloc, /* special_function */
1293 "R_PPC64_TOCSAVE", /* name */
1294 FALSE, /* partial_inplace */
1295 0, /* src_mask */
1296 0, /* dst_mask */
1297 FALSE), /* pcrel_offset */
1298
1299 /* Computes the load module index of the load module that contains the
1300 definition of its TLS sym. */
1301 HOWTO (R_PPC64_DTPMOD64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPMOD64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* Computes a dtv-relative displacement, the difference between the value
1316 of sym+add and the base address of the thread-local storage block that
1317 contains the definition of sym, minus 0x8000. */
1318 HOWTO (R_PPC64_DTPREL64,
1319 0, /* rightshift */
1320 4, /* size (0 = byte, 1 = short, 2 = long) */
1321 64, /* bitsize */
1322 FALSE, /* pc_relative */
1323 0, /* bitpos */
1324 complain_overflow_dont, /* complain_on_overflow */
1325 ppc64_elf_unhandled_reloc, /* special_function */
1326 "R_PPC64_DTPREL64", /* name */
1327 FALSE, /* partial_inplace */
1328 0, /* src_mask */
1329 ONES (64), /* dst_mask */
1330 FALSE), /* pcrel_offset */
1331
1332 /* A 16 bit dtprel reloc. */
1333 HOWTO (R_PPC64_DTPREL16,
1334 0, /* rightshift */
1335 1, /* size (0 = byte, 1 = short, 2 = long) */
1336 16, /* bitsize */
1337 FALSE, /* pc_relative */
1338 0, /* bitpos */
1339 complain_overflow_signed, /* complain_on_overflow */
1340 ppc64_elf_unhandled_reloc, /* special_function */
1341 "R_PPC64_DTPREL16", /* name */
1342 FALSE, /* partial_inplace */
1343 0, /* src_mask */
1344 0xffff, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1346
1347 /* Like DTPREL16, but no overflow. */
1348 HOWTO (R_PPC64_DTPREL16_LO,
1349 0, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_dont, /* complain_on_overflow */
1355 ppc64_elf_unhandled_reloc, /* special_function */
1356 "R_PPC64_DTPREL16_LO", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1363 HOWTO (R_PPC64_DTPREL16_HI,
1364 16, /* rightshift */
1365 1, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_dont, /* complain_on_overflow */
1370 ppc64_elf_unhandled_reloc, /* special_function */
1371 "R_PPC64_DTPREL16_HI", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1378 HOWTO (R_PPC64_DTPREL16_HA,
1379 16, /* rightshift */
1380 1, /* size (0 = byte, 1 = short, 2 = long) */
1381 16, /* bitsize */
1382 FALSE, /* pc_relative */
1383 0, /* bitpos */
1384 complain_overflow_dont, /* complain_on_overflow */
1385 ppc64_elf_unhandled_reloc, /* special_function */
1386 "R_PPC64_DTPREL16_HA", /* name */
1387 FALSE, /* partial_inplace */
1388 0, /* src_mask */
1389 0xffff, /* dst_mask */
1390 FALSE), /* pcrel_offset */
1391
1392 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1393 HOWTO (R_PPC64_DTPREL16_HIGHER,
1394 32, /* rightshift */
1395 1, /* size (0 = byte, 1 = short, 2 = long) */
1396 16, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_dont, /* complain_on_overflow */
1400 ppc64_elf_unhandled_reloc, /* special_function */
1401 "R_PPC64_DTPREL16_HIGHER", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xffff, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1408 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1409 32, /* rightshift */
1410 1, /* size (0 = byte, 1 = short, 2 = long) */
1411 16, /* bitsize */
1412 FALSE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_dont, /* complain_on_overflow */
1415 ppc64_elf_unhandled_reloc, /* special_function */
1416 "R_PPC64_DTPREL16_HIGHERA", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 0xffff, /* dst_mask */
1420 FALSE), /* pcrel_offset */
1421
1422 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1423 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1424 48, /* rightshift */
1425 1, /* size (0 = byte, 1 = short, 2 = long) */
1426 16, /* bitsize */
1427 FALSE, /* pc_relative */
1428 0, /* bitpos */
1429 complain_overflow_dont, /* complain_on_overflow */
1430 ppc64_elf_unhandled_reloc, /* special_function */
1431 "R_PPC64_DTPREL16_HIGHEST", /* name */
1432 FALSE, /* partial_inplace */
1433 0, /* src_mask */
1434 0xffff, /* dst_mask */
1435 FALSE), /* pcrel_offset */
1436
1437 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1438 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1439 48, /* rightshift */
1440 1, /* size (0 = byte, 1 = short, 2 = long) */
1441 16, /* bitsize */
1442 FALSE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_dont, /* complain_on_overflow */
1445 ppc64_elf_unhandled_reloc, /* special_function */
1446 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 0xffff, /* dst_mask */
1450 FALSE), /* pcrel_offset */
1451
1452 /* Like DTPREL16, but for insns with a DS field. */
1453 HOWTO (R_PPC64_DTPREL16_DS,
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_DTPREL16_DS", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0xfffc, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* Like DTPREL16_DS, but no overflow. */
1468 HOWTO (R_PPC64_DTPREL16_LO_DS,
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_DTPREL16_LO_DS", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 0xfffc, /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* Computes a tp-relative displacement, the difference between the value of
1483 sym+add and the value of the thread pointer (r13). */
1484 HOWTO (R_PPC64_TPREL64,
1485 0, /* rightshift */
1486 4, /* size (0 = byte, 1 = short, 2 = long) */
1487 64, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 ppc64_elf_unhandled_reloc, /* special_function */
1492 "R_PPC64_TPREL64", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 ONES (64), /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* A 16 bit tprel reloc. */
1499 HOWTO (R_PPC64_TPREL16,
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 ppc64_elf_unhandled_reloc, /* special_function */
1507 "R_PPC64_TPREL16", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512
1513 /* Like TPREL16, but no overflow. */
1514 HOWTO (R_PPC64_TPREL16_LO,
1515 0, /* rightshift */
1516 1, /* size (0 = byte, 1 = short, 2 = long) */
1517 16, /* bitsize */
1518 FALSE, /* pc_relative */
1519 0, /* bitpos */
1520 complain_overflow_dont, /* complain_on_overflow */
1521 ppc64_elf_unhandled_reloc, /* special_function */
1522 "R_PPC64_TPREL16_LO", /* name */
1523 FALSE, /* partial_inplace */
1524 0, /* src_mask */
1525 0xffff, /* dst_mask */
1526 FALSE), /* pcrel_offset */
1527
1528 /* Like TPREL16_LO, but next higher group of 16 bits. */
1529 HOWTO (R_PPC64_TPREL16_HI,
1530 16, /* rightshift */
1531 1, /* size (0 = byte, 1 = short, 2 = long) */
1532 16, /* bitsize */
1533 FALSE, /* pc_relative */
1534 0, /* bitpos */
1535 complain_overflow_dont, /* complain_on_overflow */
1536 ppc64_elf_unhandled_reloc, /* special_function */
1537 "R_PPC64_TPREL16_HI", /* name */
1538 FALSE, /* partial_inplace */
1539 0, /* src_mask */
1540 0xffff, /* dst_mask */
1541 FALSE), /* pcrel_offset */
1542
1543 /* Like TPREL16_HI, but adjust for low 16 bits. */
1544 HOWTO (R_PPC64_TPREL16_HA,
1545 16, /* rightshift */
1546 1, /* size (0 = byte, 1 = short, 2 = long) */
1547 16, /* bitsize */
1548 FALSE, /* pc_relative */
1549 0, /* bitpos */
1550 complain_overflow_dont, /* complain_on_overflow */
1551 ppc64_elf_unhandled_reloc, /* special_function */
1552 "R_PPC64_TPREL16_HA", /* name */
1553 FALSE, /* partial_inplace */
1554 0, /* src_mask */
1555 0xffff, /* dst_mask */
1556 FALSE), /* pcrel_offset */
1557
1558 /* Like TPREL16_HI, but next higher group of 16 bits. */
1559 HOWTO (R_PPC64_TPREL16_HIGHER,
1560 32, /* rightshift */
1561 1, /* size (0 = byte, 1 = short, 2 = long) */
1562 16, /* bitsize */
1563 FALSE, /* pc_relative */
1564 0, /* bitpos */
1565 complain_overflow_dont, /* complain_on_overflow */
1566 ppc64_elf_unhandled_reloc, /* special_function */
1567 "R_PPC64_TPREL16_HIGHER", /* name */
1568 FALSE, /* partial_inplace */
1569 0, /* src_mask */
1570 0xffff, /* dst_mask */
1571 FALSE), /* pcrel_offset */
1572
1573 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1574 HOWTO (R_PPC64_TPREL16_HIGHERA,
1575 32, /* rightshift */
1576 1, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_dont, /* complain_on_overflow */
1581 ppc64_elf_unhandled_reloc, /* special_function */
1582 "R_PPC64_TPREL16_HIGHERA", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1589 HOWTO (R_PPC64_TPREL16_HIGHEST,
1590 48, /* rightshift */
1591 1, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc64_elf_unhandled_reloc, /* special_function */
1597 "R_PPC64_TPREL16_HIGHEST", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1604 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1605 48, /* rightshift */
1606 1, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_dont, /* complain_on_overflow */
1611 ppc64_elf_unhandled_reloc, /* special_function */
1612 "R_PPC64_TPREL16_HIGHESTA", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0xffff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* Like TPREL16, but for insns with a DS field. */
1619 HOWTO (R_PPC64_TPREL16_DS,
1620 0, /* rightshift */
1621 1, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_signed, /* complain_on_overflow */
1626 ppc64_elf_unhandled_reloc, /* special_function */
1627 "R_PPC64_TPREL16_DS", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0xfffc, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Like TPREL16_DS, but no overflow. */
1634 HOWTO (R_PPC64_TPREL16_LO_DS,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_TPREL16_LO_DS", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xfffc, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1649 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1650 to the first entry relative to the TOC base (r2). */
1651 HOWTO (R_PPC64_GOT_TLSGD16,
1652 0, /* rightshift */
1653 1, /* size (0 = byte, 1 = short, 2 = long) */
1654 16, /* bitsize */
1655 FALSE, /* pc_relative */
1656 0, /* bitpos */
1657 complain_overflow_signed, /* complain_on_overflow */
1658 ppc64_elf_unhandled_reloc, /* special_function */
1659 "R_PPC64_GOT_TLSGD16", /* name */
1660 FALSE, /* partial_inplace */
1661 0, /* src_mask */
1662 0xffff, /* dst_mask */
1663 FALSE), /* pcrel_offset */
1664
1665 /* Like GOT_TLSGD16, but no overflow. */
1666 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1667 0, /* rightshift */
1668 1, /* size (0 = byte, 1 = short, 2 = long) */
1669 16, /* bitsize */
1670 FALSE, /* pc_relative */
1671 0, /* bitpos */
1672 complain_overflow_dont, /* complain_on_overflow */
1673 ppc64_elf_unhandled_reloc, /* special_function */
1674 "R_PPC64_GOT_TLSGD16_LO", /* name */
1675 FALSE, /* partial_inplace */
1676 0, /* src_mask */
1677 0xffff, /* dst_mask */
1678 FALSE), /* pcrel_offset */
1679
1680 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1681 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1682 16, /* rightshift */
1683 1, /* size (0 = byte, 1 = short, 2 = long) */
1684 16, /* bitsize */
1685 FALSE, /* pc_relative */
1686 0, /* bitpos */
1687 complain_overflow_dont, /* complain_on_overflow */
1688 ppc64_elf_unhandled_reloc, /* special_function */
1689 "R_PPC64_GOT_TLSGD16_HI", /* name */
1690 FALSE, /* partial_inplace */
1691 0, /* src_mask */
1692 0xffff, /* dst_mask */
1693 FALSE), /* pcrel_offset */
1694
1695 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1696 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1697 16, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_dont, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSGD16_HA", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1711 with values (sym+add)@dtpmod and zero, and computes the offset to the
1712 first entry relative to the TOC base (r2). */
1713 HOWTO (R_PPC64_GOT_TLSLD16,
1714 0, /* rightshift */
1715 1, /* size (0 = byte, 1 = short, 2 = long) */
1716 16, /* bitsize */
1717 FALSE, /* pc_relative */
1718 0, /* bitpos */
1719 complain_overflow_signed, /* complain_on_overflow */
1720 ppc64_elf_unhandled_reloc, /* special_function */
1721 "R_PPC64_GOT_TLSLD16", /* name */
1722 FALSE, /* partial_inplace */
1723 0, /* src_mask */
1724 0xffff, /* dst_mask */
1725 FALSE), /* pcrel_offset */
1726
1727 /* Like GOT_TLSLD16, but no overflow. */
1728 HOWTO (R_PPC64_GOT_TLSLD16_LO,
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_dont, /* complain_on_overflow */
1735 ppc64_elf_unhandled_reloc, /* special_function */
1736 "R_PPC64_GOT_TLSLD16_LO", /* name */
1737 FALSE, /* partial_inplace */
1738 0, /* src_mask */
1739 0xffff, /* dst_mask */
1740 FALSE), /* pcrel_offset */
1741
1742 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1743 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1744 16, /* rightshift */
1745 1, /* size (0 = byte, 1 = short, 2 = long) */
1746 16, /* bitsize */
1747 FALSE, /* pc_relative */
1748 0, /* bitpos */
1749 complain_overflow_dont, /* complain_on_overflow */
1750 ppc64_elf_unhandled_reloc, /* special_function */
1751 "R_PPC64_GOT_TLSLD16_HI", /* name */
1752 FALSE, /* partial_inplace */
1753 0, /* src_mask */
1754 0xffff, /* dst_mask */
1755 FALSE), /* pcrel_offset */
1756
1757 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1758 HOWTO (R_PPC64_GOT_TLSLD16_HA,
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_TLSLD16_HA", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xffff, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1773 the offset to the entry relative to the TOC base (r2). */
1774 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1775 0, /* rightshift */
1776 1, /* size (0 = byte, 1 = short, 2 = long) */
1777 16, /* bitsize */
1778 FALSE, /* pc_relative */
1779 0, /* bitpos */
1780 complain_overflow_signed, /* complain_on_overflow */
1781 ppc64_elf_unhandled_reloc, /* special_function */
1782 "R_PPC64_GOT_DTPREL16_DS", /* name */
1783 FALSE, /* partial_inplace */
1784 0, /* src_mask */
1785 0xfffc, /* dst_mask */
1786 FALSE), /* pcrel_offset */
1787
1788 /* Like GOT_DTPREL16_DS, but no overflow. */
1789 HOWTO (R_PPC64_GOT_DTPREL16_LO_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_dont, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xfffc, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1804 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1805 16, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_dont, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_DTPREL16_HI", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xffff, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1819 HOWTO (R_PPC64_GOT_DTPREL16_HA,
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_DTPREL16_HA", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0xffff, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1834 offset to the entry relative to the TOC base (r2). */
1835 HOWTO (R_PPC64_GOT_TPREL16_DS,
1836 0, /* rightshift */
1837 1, /* size (0 = byte, 1 = short, 2 = long) */
1838 16, /* bitsize */
1839 FALSE, /* pc_relative */
1840 0, /* bitpos */
1841 complain_overflow_signed, /* complain_on_overflow */
1842 ppc64_elf_unhandled_reloc, /* special_function */
1843 "R_PPC64_GOT_TPREL16_DS", /* name */
1844 FALSE, /* partial_inplace */
1845 0, /* src_mask */
1846 0xfffc, /* dst_mask */
1847 FALSE), /* pcrel_offset */
1848
1849 /* Like GOT_TPREL16_DS, but no overflow. */
1850 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1851 0, /* rightshift */
1852 1, /* size (0 = byte, 1 = short, 2 = long) */
1853 16, /* bitsize */
1854 FALSE, /* pc_relative */
1855 0, /* bitpos */
1856 complain_overflow_dont, /* complain_on_overflow */
1857 ppc64_elf_unhandled_reloc, /* special_function */
1858 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1859 FALSE, /* partial_inplace */
1860 0, /* src_mask */
1861 0xfffc, /* dst_mask */
1862 FALSE), /* pcrel_offset */
1863
1864 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1865 HOWTO (R_PPC64_GOT_TPREL16_HI,
1866 16, /* rightshift */
1867 1, /* size (0 = byte, 1 = short, 2 = long) */
1868 16, /* bitsize */
1869 FALSE, /* pc_relative */
1870 0, /* bitpos */
1871 complain_overflow_dont, /* complain_on_overflow */
1872 ppc64_elf_unhandled_reloc, /* special_function */
1873 "R_PPC64_GOT_TPREL16_HI", /* name */
1874 FALSE, /* partial_inplace */
1875 0, /* src_mask */
1876 0xffff, /* dst_mask */
1877 FALSE), /* pcrel_offset */
1878
1879 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1880 HOWTO (R_PPC64_GOT_TPREL16_HA,
1881 16, /* rightshift */
1882 1, /* size (0 = byte, 1 = short, 2 = long) */
1883 16, /* bitsize */
1884 FALSE, /* pc_relative */
1885 0, /* bitpos */
1886 complain_overflow_dont, /* complain_on_overflow */
1887 ppc64_elf_unhandled_reloc, /* special_function */
1888 "R_PPC64_GOT_TPREL16_HA", /* name */
1889 FALSE, /* partial_inplace */
1890 0, /* src_mask */
1891 0xffff, /* dst_mask */
1892 FALSE), /* pcrel_offset */
1893
1894 HOWTO (R_PPC64_JMP_IREL, /* type */
1895 0, /* rightshift */
1896 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1897 0, /* bitsize */
1898 FALSE, /* pc_relative */
1899 0, /* bitpos */
1900 complain_overflow_dont, /* complain_on_overflow */
1901 ppc64_elf_unhandled_reloc, /* special_function */
1902 "R_PPC64_JMP_IREL", /* name */
1903 FALSE, /* partial_inplace */
1904 0, /* src_mask */
1905 0, /* dst_mask */
1906 FALSE), /* pcrel_offset */
1907
1908 HOWTO (R_PPC64_IRELATIVE, /* type */
1909 0, /* rightshift */
1910 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1911 64, /* bitsize */
1912 FALSE, /* pc_relative */
1913 0, /* bitpos */
1914 complain_overflow_dont, /* complain_on_overflow */
1915 bfd_elf_generic_reloc, /* special_function */
1916 "R_PPC64_IRELATIVE", /* name */
1917 FALSE, /* partial_inplace */
1918 0, /* src_mask */
1919 ONES (64), /* dst_mask */
1920 FALSE), /* pcrel_offset */
1921
1922 /* A 16 bit relative relocation. */
1923 HOWTO (R_PPC64_REL16, /* type */
1924 0, /* rightshift */
1925 1, /* size (0 = byte, 1 = short, 2 = long) */
1926 16, /* bitsize */
1927 TRUE, /* pc_relative */
1928 0, /* bitpos */
1929 complain_overflow_bitfield, /* complain_on_overflow */
1930 bfd_elf_generic_reloc, /* special_function */
1931 "R_PPC64_REL16", /* name */
1932 FALSE, /* partial_inplace */
1933 0, /* src_mask */
1934 0xffff, /* dst_mask */
1935 TRUE), /* pcrel_offset */
1936
1937 /* A 16 bit relative relocation without overflow. */
1938 HOWTO (R_PPC64_REL16_LO, /* type */
1939 0, /* rightshift */
1940 1, /* size (0 = byte, 1 = short, 2 = long) */
1941 16, /* bitsize */
1942 TRUE, /* pc_relative */
1943 0, /* bitpos */
1944 complain_overflow_dont,/* complain_on_overflow */
1945 bfd_elf_generic_reloc, /* special_function */
1946 "R_PPC64_REL16_LO", /* name */
1947 FALSE, /* partial_inplace */
1948 0, /* src_mask */
1949 0xffff, /* dst_mask */
1950 TRUE), /* pcrel_offset */
1951
1952 /* The high order 16 bits of a relative address. */
1953 HOWTO (R_PPC64_REL16_HI, /* type */
1954 16, /* rightshift */
1955 1, /* size (0 = byte, 1 = short, 2 = long) */
1956 16, /* bitsize */
1957 TRUE, /* pc_relative */
1958 0, /* bitpos */
1959 complain_overflow_dont, /* complain_on_overflow */
1960 bfd_elf_generic_reloc, /* special_function */
1961 "R_PPC64_REL16_HI", /* name */
1962 FALSE, /* partial_inplace */
1963 0, /* src_mask */
1964 0xffff, /* dst_mask */
1965 TRUE), /* pcrel_offset */
1966
1967 /* The high order 16 bits of a relative address, plus 1 if the contents of
1968 the low 16 bits, treated as a signed number, is negative. */
1969 HOWTO (R_PPC64_REL16_HA, /* type */
1970 16, /* rightshift */
1971 1, /* size (0 = byte, 1 = short, 2 = long) */
1972 16, /* bitsize */
1973 TRUE, /* pc_relative */
1974 0, /* bitpos */
1975 complain_overflow_dont, /* complain_on_overflow */
1976 ppc64_elf_ha_reloc, /* special_function */
1977 "R_PPC64_REL16_HA", /* name */
1978 FALSE, /* partial_inplace */
1979 0, /* src_mask */
1980 0xffff, /* dst_mask */
1981 TRUE), /* pcrel_offset */
1982
1983 /* GNU extension to record C++ vtable hierarchy. */
1984 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1985 0, /* rightshift */
1986 0, /* size (0 = byte, 1 = short, 2 = long) */
1987 0, /* bitsize */
1988 FALSE, /* pc_relative */
1989 0, /* bitpos */
1990 complain_overflow_dont, /* complain_on_overflow */
1991 NULL, /* special_function */
1992 "R_PPC64_GNU_VTINHERIT", /* name */
1993 FALSE, /* partial_inplace */
1994 0, /* src_mask */
1995 0, /* dst_mask */
1996 FALSE), /* pcrel_offset */
1997
1998 /* GNU extension to record C++ vtable member usage. */
1999 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2000 0, /* rightshift */
2001 0, /* size (0 = byte, 1 = short, 2 = long) */
2002 0, /* bitsize */
2003 FALSE, /* pc_relative */
2004 0, /* bitpos */
2005 complain_overflow_dont, /* complain_on_overflow */
2006 NULL, /* special_function */
2007 "R_PPC64_GNU_VTENTRY", /* name */
2008 FALSE, /* partial_inplace */
2009 0, /* src_mask */
2010 0, /* dst_mask */
2011 FALSE), /* pcrel_offset */
2012 };
2013
2014 \f
2015 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2016 be done. */
2017
2018 static void
2019 ppc_howto_init (void)
2020 {
2021 unsigned int i, type;
2022
2023 for (i = 0;
2024 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2025 i++)
2026 {
2027 type = ppc64_elf_howto_raw[i].type;
2028 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2029 / sizeof (ppc64_elf_howto_table[0])));
2030 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2031 }
2032 }
2033
2034 static reloc_howto_type *
2035 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2036 bfd_reloc_code_real_type code)
2037 {
2038 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2039
2040 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2041 /* Initialize howto table if needed. */
2042 ppc_howto_init ();
2043
2044 switch (code)
2045 {
2046 default:
2047 return NULL;
2048
2049 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2050 break;
2051 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2052 break;
2053 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2054 break;
2055 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2056 break;
2057 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2058 break;
2059 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2060 break;
2061 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2062 break;
2063 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2064 break;
2065 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2066 break;
2067 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2068 break;
2069 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2070 break;
2071 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2072 break;
2073 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2074 break;
2075 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2076 break;
2077 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2078 break;
2079 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2080 break;
2081 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2082 break;
2083 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2084 break;
2085 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2086 break;
2087 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2088 break;
2089 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2090 break;
2091 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2092 break;
2093 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2094 break;
2095 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2096 break;
2097 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2098 break;
2099 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2100 break;
2101 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2102 break;
2103 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2104 break;
2105 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2106 break;
2107 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2108 break;
2109 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2110 break;
2111 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2112 break;
2113 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2114 break;
2115 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2116 break;
2117 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2118 break;
2119 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2120 break;
2121 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2122 break;
2123 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2124 break;
2125 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2126 break;
2127 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2128 break;
2129 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2130 break;
2131 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2132 break;
2133 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2134 break;
2135 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2136 break;
2137 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2138 break;
2139 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2140 break;
2141 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2142 break;
2143 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2144 break;
2145 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2146 break;
2147 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2148 break;
2149 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2150 break;
2151 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2152 break;
2153 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2154 break;
2155 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2156 break;
2157 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2158 break;
2159 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2160 break;
2161 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2162 break;
2163 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2164 break;
2165 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2166 break;
2167 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2168 break;
2169 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2170 break;
2171 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2172 break;
2173 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2174 break;
2175 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2176 break;
2177 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2178 break;
2179 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2180 break;
2181 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2182 break;
2183 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2184 break;
2185 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2186 break;
2187 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2188 break;
2189 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2190 break;
2191 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2192 break;
2193 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2194 break;
2195 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2196 break;
2197 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2198 break;
2199 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2200 break;
2201 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2202 break;
2203 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2204 break;
2205 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2206 break;
2207 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2208 break;
2209 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2210 break;
2211 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2212 break;
2213 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2214 break;
2215 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2216 break;
2217 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2218 break;
2219 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2220 break;
2221 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2222 break;
2223 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2224 break;
2225 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2226 break;
2227 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2228 break;
2229 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2230 break;
2231 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2232 break;
2233 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2234 break;
2235 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2236 break;
2237 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2238 break;
2239 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2240 break;
2241 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2242 break;
2243 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2244 break;
2245 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2246 break;
2247 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2248 break;
2249 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2250 break;
2251 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2252 break;
2253 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2254 break;
2255 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2256 break;
2257 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2258 break;
2259 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2260 break;
2261 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2262 break;
2263 }
2264
2265 return ppc64_elf_howto_table[r];
2266 };
2267
2268 static reloc_howto_type *
2269 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2270 const char *r_name)
2271 {
2272 unsigned int i;
2273
2274 for (i = 0;
2275 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2276 i++)
2277 if (ppc64_elf_howto_raw[i].name != NULL
2278 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2279 return &ppc64_elf_howto_raw[i];
2280
2281 return NULL;
2282 }
2283
2284 /* Set the howto pointer for a PowerPC ELF reloc. */
2285
2286 static void
2287 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2288 Elf_Internal_Rela *dst)
2289 {
2290 unsigned int type;
2291
2292 /* Initialize howto table if needed. */
2293 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2294 ppc_howto_init ();
2295
2296 type = ELF64_R_TYPE (dst->r_info);
2297 if (type >= (sizeof (ppc64_elf_howto_table)
2298 / sizeof (ppc64_elf_howto_table[0])))
2299 {
2300 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2301 abfd, (int) type);
2302 type = R_PPC64_NONE;
2303 }
2304 cache_ptr->howto = ppc64_elf_howto_table[type];
2305 }
2306
2307 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2308
2309 static bfd_reloc_status_type
2310 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2311 void *data, asection *input_section,
2312 bfd *output_bfd, char **error_message)
2313 {
2314 /* If this is a relocatable link (output_bfd test tells us), just
2315 call the generic function. Any adjustment will be done at final
2316 link time. */
2317 if (output_bfd != NULL)
2318 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2319 input_section, output_bfd, error_message);
2320
2321 /* Adjust the addend for sign extension of the low 16 bits.
2322 We won't actually be using the low 16 bits, so trashing them
2323 doesn't matter. */
2324 reloc_entry->addend += 0x8000;
2325 return bfd_reloc_continue;
2326 }
2327
2328 static bfd_reloc_status_type
2329 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2330 void *data, asection *input_section,
2331 bfd *output_bfd, char **error_message)
2332 {
2333 if (output_bfd != NULL)
2334 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2335 input_section, output_bfd, error_message);
2336
2337 if (strcmp (symbol->section->name, ".opd") == 0
2338 && (symbol->section->owner->flags & DYNAMIC) == 0)
2339 {
2340 bfd_vma dest = opd_entry_value (symbol->section,
2341 symbol->value + reloc_entry->addend,
2342 NULL, NULL);
2343 if (dest != (bfd_vma) -1)
2344 reloc_entry->addend = dest - (symbol->value
2345 + symbol->section->output_section->vma
2346 + symbol->section->output_offset);
2347 }
2348 return bfd_reloc_continue;
2349 }
2350
2351 static bfd_reloc_status_type
2352 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2353 void *data, asection *input_section,
2354 bfd *output_bfd, char **error_message)
2355 {
2356 long insn;
2357 enum elf_ppc64_reloc_type r_type;
2358 bfd_size_type octets;
2359 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2360 bfd_boolean is_power4 = FALSE;
2361
2362 /* If this is a relocatable link (output_bfd test tells us), just
2363 call the generic function. Any adjustment will be done at final
2364 link time. */
2365 if (output_bfd != NULL)
2366 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2367 input_section, output_bfd, error_message);
2368
2369 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2370 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2371 insn &= ~(0x01 << 21);
2372 r_type = reloc_entry->howto->type;
2373 if (r_type == R_PPC64_ADDR14_BRTAKEN
2374 || r_type == R_PPC64_REL14_BRTAKEN)
2375 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2376
2377 if (is_power4)
2378 {
2379 /* Set 'a' bit. This is 0b00010 in BO field for branch
2380 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2381 for branch on CTR insns (BO == 1a00t or 1a01t). */
2382 if ((insn & (0x14 << 21)) == (0x04 << 21))
2383 insn |= 0x02 << 21;
2384 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2385 insn |= 0x08 << 21;
2386 else
2387 goto out;
2388 }
2389 else
2390 {
2391 bfd_vma target = 0;
2392 bfd_vma from;
2393
2394 if (!bfd_is_com_section (symbol->section))
2395 target = symbol->value;
2396 target += symbol->section->output_section->vma;
2397 target += symbol->section->output_offset;
2398 target += reloc_entry->addend;
2399
2400 from = (reloc_entry->address
2401 + input_section->output_offset
2402 + input_section->output_section->vma);
2403
2404 /* Invert 'y' bit if not the default. */
2405 if ((bfd_signed_vma) (target - from) < 0)
2406 insn ^= 0x01 << 21;
2407 }
2408 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2409 out:
2410 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2411 input_section, output_bfd, error_message);
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428 return bfd_reloc_continue;
2429 }
2430
2431 static bfd_reloc_status_type
2432 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2433 void *data, asection *input_section,
2434 bfd *output_bfd, char **error_message)
2435 {
2436 /* If this is a relocatable link (output_bfd test tells us), just
2437 call the generic function. Any adjustment will be done at final
2438 link time. */
2439 if (output_bfd != NULL)
2440 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2441 input_section, output_bfd, error_message);
2442
2443 /* Subtract the symbol section base address. */
2444 reloc_entry->addend -= symbol->section->output_section->vma;
2445
2446 /* Adjust the addend for sign extension of the low 16 bits. */
2447 reloc_entry->addend += 0x8000;
2448 return bfd_reloc_continue;
2449 }
2450
2451 static bfd_reloc_status_type
2452 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2453 void *data, asection *input_section,
2454 bfd *output_bfd, char **error_message)
2455 {
2456 bfd_vma TOCstart;
2457
2458 /* If this is a relocatable link (output_bfd test tells us), just
2459 call the generic function. Any adjustment will be done at final
2460 link time. */
2461 if (output_bfd != NULL)
2462 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2463 input_section, output_bfd, error_message);
2464
2465 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2466 if (TOCstart == 0)
2467 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2468
2469 /* Subtract the TOC base address. */
2470 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2471 return bfd_reloc_continue;
2472 }
2473
2474 static bfd_reloc_status_type
2475 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2476 void *data, asection *input_section,
2477 bfd *output_bfd, char **error_message)
2478 {
2479 bfd_vma TOCstart;
2480
2481 /* If this is a relocatable link (output_bfd test tells us), just
2482 call the generic function. Any adjustment will be done at final
2483 link time. */
2484 if (output_bfd != NULL)
2485 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2486 input_section, output_bfd, error_message);
2487
2488 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2489 if (TOCstart == 0)
2490 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2491
2492 /* Subtract the TOC base address. */
2493 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2494
2495 /* Adjust the addend for sign extension of the low 16 bits. */
2496 reloc_entry->addend += 0x8000;
2497 return bfd_reloc_continue;
2498 }
2499
2500 static bfd_reloc_status_type
2501 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2502 void *data, asection *input_section,
2503 bfd *output_bfd, char **error_message)
2504 {
2505 bfd_vma TOCstart;
2506 bfd_size_type octets;
2507
2508 /* If this is a relocatable link (output_bfd test tells us), just
2509 call the generic function. Any adjustment will be done at final
2510 link time. */
2511 if (output_bfd != NULL)
2512 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2513 input_section, output_bfd, error_message);
2514
2515 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2516 if (TOCstart == 0)
2517 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2518
2519 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2520 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2521 return bfd_reloc_ok;
2522 }
2523
2524 static bfd_reloc_status_type
2525 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2526 void *data, asection *input_section,
2527 bfd *output_bfd, char **error_message)
2528 {
2529 /* If this is a relocatable link (output_bfd test tells us), just
2530 call the generic function. Any adjustment will be done at final
2531 link time. */
2532 if (output_bfd != NULL)
2533 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2534 input_section, output_bfd, error_message);
2535
2536 if (error_message != NULL)
2537 {
2538 static char buf[60];
2539 sprintf (buf, "generic linker can't handle %s",
2540 reloc_entry->howto->name);
2541 *error_message = buf;
2542 }
2543 return bfd_reloc_dangerous;
2544 }
2545
2546 /* Track GOT entries needed for a given symbol. We might need more
2547 than one got entry per symbol. */
2548 struct got_entry
2549 {
2550 struct got_entry *next;
2551
2552 /* The symbol addend that we'll be placing in the GOT. */
2553 bfd_vma addend;
2554
2555 /* Unlike other ELF targets, we use separate GOT entries for the same
2556 symbol referenced from different input files. This is to support
2557 automatic multiple TOC/GOT sections, where the TOC base can vary
2558 from one input file to another. After partitioning into TOC groups
2559 we merge entries within the group.
2560
2561 Point to the BFD owning this GOT entry. */
2562 bfd *owner;
2563
2564 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2565 TLS_TPREL or TLS_DTPREL for tls entries. */
2566 unsigned char tls_type;
2567
2568 /* Non-zero if got.ent points to real entry. */
2569 unsigned char is_indirect;
2570
2571 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2572 union
2573 {
2574 bfd_signed_vma refcount;
2575 bfd_vma offset;
2576 struct got_entry *ent;
2577 } got;
2578 };
2579
2580 /* The same for PLT. */
2581 struct plt_entry
2582 {
2583 struct plt_entry *next;
2584
2585 bfd_vma addend;
2586
2587 union
2588 {
2589 bfd_signed_vma refcount;
2590 bfd_vma offset;
2591 } plt;
2592 };
2593
2594 struct ppc64_elf_obj_tdata
2595 {
2596 struct elf_obj_tdata elf;
2597
2598 /* Shortcuts to dynamic linker sections. */
2599 asection *got;
2600 asection *relgot;
2601
2602 /* Used during garbage collection. We attach global symbols defined
2603 on removed .opd entries to this section so that the sym is removed. */
2604 asection *deleted_section;
2605
2606 /* TLS local dynamic got entry handling. Support for multiple GOT
2607 sections means we potentially need one of these for each input bfd. */
2608 struct got_entry tlsld_got;
2609
2610 /* A copy of relocs before they are modified for --emit-relocs. */
2611 Elf_Internal_Rela *opd_relocs;
2612
2613 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2614 the reloc to be in the range -32768 to 32767. */
2615 unsigned int has_small_toc_reloc : 1;
2616
2617 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2618 instruction not one we handle. */
2619 unsigned int unexpected_toc_insn : 1;
2620 };
2621
2622 #define ppc64_elf_tdata(bfd) \
2623 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2624
2625 #define ppc64_tlsld_got(bfd) \
2626 (&ppc64_elf_tdata (bfd)->tlsld_got)
2627
2628 #define is_ppc64_elf(bfd) \
2629 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2630 && elf_object_id (bfd) == PPC64_ELF_DATA)
2631
2632 /* Override the generic function because we store some extras. */
2633
2634 static bfd_boolean
2635 ppc64_elf_mkobject (bfd *abfd)
2636 {
2637 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2638 PPC64_ELF_DATA);
2639 }
2640
2641 /* Fix bad default arch selected for a 64 bit input bfd when the
2642 default is 32 bit. */
2643
2644 static bfd_boolean
2645 ppc64_elf_object_p (bfd *abfd)
2646 {
2647 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2648 {
2649 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2650
2651 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2652 {
2653 /* Relies on arch after 32 bit default being 64 bit default. */
2654 abfd->arch_info = abfd->arch_info->next;
2655 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2656 }
2657 }
2658 return TRUE;
2659 }
2660
2661 /* Support for core dump NOTE sections. */
2662
2663 static bfd_boolean
2664 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2665 {
2666 size_t offset, size;
2667
2668 if (note->descsz != 504)
2669 return FALSE;
2670
2671 /* pr_cursig */
2672 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2673
2674 /* pr_pid */
2675 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2676
2677 /* pr_reg */
2678 offset = 112;
2679 size = 384;
2680
2681 /* Make a ".reg/999" section. */
2682 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2683 size, note->descpos + offset);
2684 }
2685
2686 static bfd_boolean
2687 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2688 {
2689 if (note->descsz != 136)
2690 return FALSE;
2691
2692 elf_tdata (abfd)->core_pid
2693 = bfd_get_32 (abfd, note->descdata + 24);
2694 elf_tdata (abfd)->core_program
2695 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2696 elf_tdata (abfd)->core_command
2697 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2698
2699 return TRUE;
2700 }
2701
2702 static char *
2703 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2704 ...)
2705 {
2706 switch (note_type)
2707 {
2708 default:
2709 return NULL;
2710
2711 case NT_PRPSINFO:
2712 {
2713 char data[136];
2714 va_list ap;
2715
2716 va_start (ap, note_type);
2717 memset (data, 0, 40);
2718 strncpy (data + 40, va_arg (ap, const char *), 16);
2719 strncpy (data + 56, va_arg (ap, const char *), 80);
2720 va_end (ap);
2721 return elfcore_write_note (abfd, buf, bufsiz,
2722 "CORE", note_type, data, sizeof (data));
2723 }
2724
2725 case NT_PRSTATUS:
2726 {
2727 char data[504];
2728 va_list ap;
2729 long pid;
2730 int cursig;
2731 const void *greg;
2732
2733 va_start (ap, note_type);
2734 memset (data, 0, 112);
2735 pid = va_arg (ap, long);
2736 bfd_put_32 (abfd, pid, data + 32);
2737 cursig = va_arg (ap, int);
2738 bfd_put_16 (abfd, cursig, data + 12);
2739 greg = va_arg (ap, const void *);
2740 memcpy (data + 112, greg, 384);
2741 memset (data + 496, 0, 8);
2742 va_end (ap);
2743 return elfcore_write_note (abfd, buf, bufsiz,
2744 "CORE", note_type, data, sizeof (data));
2745 }
2746 }
2747 }
2748
2749 /* Add extra PPC sections. */
2750
2751 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2752 {
2753 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2754 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2755 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2756 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2757 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2758 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2759 { NULL, 0, 0, 0, 0 }
2760 };
2761
2762 enum _ppc64_sec_type {
2763 sec_normal = 0,
2764 sec_opd = 1,
2765 sec_toc = 2
2766 };
2767
2768 struct _ppc64_elf_section_data
2769 {
2770 struct bfd_elf_section_data elf;
2771
2772 union
2773 {
2774 /* An array with one entry for each opd function descriptor. */
2775 struct _opd_sec_data
2776 {
2777 /* Points to the function code section for local opd entries. */
2778 asection **func_sec;
2779
2780 /* After editing .opd, adjust references to opd local syms. */
2781 long *adjust;
2782 } opd;
2783
2784 /* An array for toc sections, indexed by offset/8. */
2785 struct _toc_sec_data
2786 {
2787 /* Specifies the relocation symbol index used at a given toc offset. */
2788 unsigned *symndx;
2789
2790 /* And the relocation addend. */
2791 bfd_vma *add;
2792 } toc;
2793 } u;
2794
2795 enum _ppc64_sec_type sec_type:2;
2796
2797 /* Flag set when small branches are detected. Used to
2798 select suitable defaults for the stub group size. */
2799 unsigned int has_14bit_branch:1;
2800 };
2801
2802 #define ppc64_elf_section_data(sec) \
2803 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2804
2805 static bfd_boolean
2806 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2807 {
2808 if (!sec->used_by_bfd)
2809 {
2810 struct _ppc64_elf_section_data *sdata;
2811 bfd_size_type amt = sizeof (*sdata);
2812
2813 sdata = bfd_zalloc (abfd, amt);
2814 if (sdata == NULL)
2815 return FALSE;
2816 sec->used_by_bfd = sdata;
2817 }
2818
2819 return _bfd_elf_new_section_hook (abfd, sec);
2820 }
2821
2822 static struct _opd_sec_data *
2823 get_opd_info (asection * sec)
2824 {
2825 if (sec != NULL
2826 && ppc64_elf_section_data (sec) != NULL
2827 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2828 return &ppc64_elf_section_data (sec)->u.opd;
2829 return NULL;
2830 }
2831 \f
2832 /* Parameters for the qsort hook. */
2833 static bfd_boolean synthetic_relocatable;
2834
2835 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2836
2837 static int
2838 compare_symbols (const void *ap, const void *bp)
2839 {
2840 const asymbol *a = * (const asymbol **) ap;
2841 const asymbol *b = * (const asymbol **) bp;
2842
2843 /* Section symbols first. */
2844 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2845 return -1;
2846 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2847 return 1;
2848
2849 /* then .opd symbols. */
2850 if (strcmp (a->section->name, ".opd") == 0
2851 && strcmp (b->section->name, ".opd") != 0)
2852 return -1;
2853 if (strcmp (a->section->name, ".opd") != 0
2854 && strcmp (b->section->name, ".opd") == 0)
2855 return 1;
2856
2857 /* then other code symbols. */
2858 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2859 == (SEC_CODE | SEC_ALLOC)
2860 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2861 != (SEC_CODE | SEC_ALLOC))
2862 return -1;
2863
2864 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2865 != (SEC_CODE | SEC_ALLOC)
2866 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC))
2868 return 1;
2869
2870 if (synthetic_relocatable)
2871 {
2872 if (a->section->id < b->section->id)
2873 return -1;
2874
2875 if (a->section->id > b->section->id)
2876 return 1;
2877 }
2878
2879 if (a->value + a->section->vma < b->value + b->section->vma)
2880 return -1;
2881
2882 if (a->value + a->section->vma > b->value + b->section->vma)
2883 return 1;
2884
2885 /* For syms with the same value, prefer strong dynamic global function
2886 syms over other syms. */
2887 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2888 return -1;
2889
2890 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2891 return 1;
2892
2893 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2894 return -1;
2895
2896 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2897 return 1;
2898
2899 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2900 return -1;
2901
2902 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2903 return 1;
2904
2905 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2906 return -1;
2907
2908 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2909 return 1;
2910
2911 return 0;
2912 }
2913
2914 /* Search SYMS for a symbol of the given VALUE. */
2915
2916 static asymbol *
2917 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2918 {
2919 long mid;
2920
2921 if (id == -1)
2922 {
2923 while (lo < hi)
2924 {
2925 mid = (lo + hi) >> 1;
2926 if (syms[mid]->value + syms[mid]->section->vma < value)
2927 lo = mid + 1;
2928 else if (syms[mid]->value + syms[mid]->section->vma > value)
2929 hi = mid;
2930 else
2931 return syms[mid];
2932 }
2933 }
2934 else
2935 {
2936 while (lo < hi)
2937 {
2938 mid = (lo + hi) >> 1;
2939 if (syms[mid]->section->id < id)
2940 lo = mid + 1;
2941 else if (syms[mid]->section->id > id)
2942 hi = mid;
2943 else if (syms[mid]->value < value)
2944 lo = mid + 1;
2945 else if (syms[mid]->value > value)
2946 hi = mid;
2947 else
2948 return syms[mid];
2949 }
2950 }
2951 return NULL;
2952 }
2953
2954 static bfd_boolean
2955 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2956 {
2957 bfd_vma vma = *(bfd_vma *) ptr;
2958 return ((section->flags & SEC_ALLOC) != 0
2959 && section->vma <= vma
2960 && vma < section->vma + section->size);
2961 }
2962
2963 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2964 entry syms. Also generate @plt symbols for the glink branch table. */
2965
2966 static long
2967 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2968 long static_count, asymbol **static_syms,
2969 long dyn_count, asymbol **dyn_syms,
2970 asymbol **ret)
2971 {
2972 asymbol *s;
2973 long i;
2974 long count;
2975 char *names;
2976 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2977 asection *opd;
2978 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2979 asymbol **syms;
2980
2981 *ret = NULL;
2982
2983 opd = bfd_get_section_by_name (abfd, ".opd");
2984 if (opd == NULL)
2985 return 0;
2986
2987 symcount = static_count;
2988 if (!relocatable)
2989 symcount += dyn_count;
2990 if (symcount == 0)
2991 return 0;
2992
2993 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2994 if (syms == NULL)
2995 return -1;
2996
2997 if (!relocatable && static_count != 0 && dyn_count != 0)
2998 {
2999 /* Use both symbol tables. */
3000 memcpy (syms, static_syms, static_count * sizeof (*syms));
3001 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3002 }
3003 else if (!relocatable && static_count == 0)
3004 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3005 else
3006 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3007
3008 synthetic_relocatable = relocatable;
3009 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3010
3011 if (!relocatable && symcount > 1)
3012 {
3013 long j;
3014 /* Trim duplicate syms, since we may have merged the normal and
3015 dynamic symbols. Actually, we only care about syms that have
3016 different values, so trim any with the same value. */
3017 for (i = 1, j = 1; i < symcount; ++i)
3018 if (syms[i - 1]->value + syms[i - 1]->section->vma
3019 != syms[i]->value + syms[i]->section->vma)
3020 syms[j++] = syms[i];
3021 symcount = j;
3022 }
3023
3024 i = 0;
3025 if (strcmp (syms[i]->section->name, ".opd") == 0)
3026 ++i;
3027 codesecsym = i;
3028
3029 for (; i < symcount; ++i)
3030 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3031 != (SEC_CODE | SEC_ALLOC))
3032 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3033 break;
3034 codesecsymend = i;
3035
3036 for (; i < symcount; ++i)
3037 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3038 break;
3039 secsymend = i;
3040
3041 for (; i < symcount; ++i)
3042 if (strcmp (syms[i]->section->name, ".opd") != 0)
3043 break;
3044 opdsymend = i;
3045
3046 for (; i < symcount; ++i)
3047 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3048 != (SEC_CODE | SEC_ALLOC))
3049 break;
3050 symcount = i;
3051
3052 count = 0;
3053
3054 if (relocatable)
3055 {
3056 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3057 arelent *r;
3058 size_t size;
3059 long relcount;
3060
3061 if (opdsymend == secsymend)
3062 goto done;
3063
3064 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3065 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3066 if (relcount == 0)
3067 goto done;
3068
3069 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3070 {
3071 count = -1;
3072 goto done;
3073 }
3074
3075 size = 0;
3076 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3077 {
3078 asymbol *sym;
3079
3080 while (r < opd->relocation + relcount
3081 && r->address < syms[i]->value + opd->vma)
3082 ++r;
3083
3084 if (r == opd->relocation + relcount)
3085 break;
3086
3087 if (r->address != syms[i]->value + opd->vma)
3088 continue;
3089
3090 if (r->howto->type != R_PPC64_ADDR64)
3091 continue;
3092
3093 sym = *r->sym_ptr_ptr;
3094 if (!sym_exists_at (syms, opdsymend, symcount,
3095 sym->section->id, sym->value + r->addend))
3096 {
3097 ++count;
3098 size += sizeof (asymbol);
3099 size += strlen (syms[i]->name) + 2;
3100 }
3101 }
3102
3103 s = *ret = bfd_malloc (size);
3104 if (s == NULL)
3105 {
3106 count = -1;
3107 goto done;
3108 }
3109
3110 names = (char *) (s + count);
3111
3112 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3113 {
3114 asymbol *sym;
3115
3116 while (r < opd->relocation + relcount
3117 && r->address < syms[i]->value + opd->vma)
3118 ++r;
3119
3120 if (r == opd->relocation + relcount)
3121 break;
3122
3123 if (r->address != syms[i]->value + opd->vma)
3124 continue;
3125
3126 if (r->howto->type != R_PPC64_ADDR64)
3127 continue;
3128
3129 sym = *r->sym_ptr_ptr;
3130 if (!sym_exists_at (syms, opdsymend, symcount,
3131 sym->section->id, sym->value + r->addend))
3132 {
3133 size_t len;
3134
3135 *s = *syms[i];
3136 s->flags |= BSF_SYNTHETIC;
3137 s->section = sym->section;
3138 s->value = sym->value + r->addend;
3139 s->name = names;
3140 *names++ = '.';
3141 len = strlen (syms[i]->name);
3142 memcpy (names, syms[i]->name, len + 1);
3143 names += len + 1;
3144 /* Have udata.p point back to the original symbol this
3145 synthetic symbol was derived from. */
3146 s->udata.p = syms[i];
3147 s++;
3148 }
3149 }
3150 }
3151 else
3152 {
3153 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3154 bfd_byte *contents;
3155 size_t size;
3156 long plt_count = 0;
3157 bfd_vma glink_vma = 0, resolv_vma = 0;
3158 asection *dynamic, *glink = NULL, *relplt = NULL;
3159 arelent *p;
3160
3161 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3162 {
3163 if (contents)
3164 {
3165 free_contents_and_exit:
3166 free (contents);
3167 }
3168 count = -1;
3169 goto done;
3170 }
3171
3172 size = 0;
3173 for (i = secsymend; i < opdsymend; ++i)
3174 {
3175 bfd_vma ent;
3176
3177 /* Ignore bogus symbols. */
3178 if (syms[i]->value > opd->size - 8)
3179 continue;
3180
3181 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3182 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3183 {
3184 ++count;
3185 size += sizeof (asymbol);
3186 size += strlen (syms[i]->name) + 2;
3187 }
3188 }
3189
3190 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3191 if (dyn_count != 0
3192 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3193 {
3194 bfd_byte *dynbuf, *extdyn, *extdynend;
3195 size_t extdynsize;
3196 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3197
3198 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3199 goto free_contents_and_exit;
3200
3201 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3202 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3203
3204 extdyn = dynbuf;
3205 extdynend = extdyn + dynamic->size;
3206 for (; extdyn < extdynend; extdyn += extdynsize)
3207 {
3208 Elf_Internal_Dyn dyn;
3209 (*swap_dyn_in) (abfd, extdyn, &dyn);
3210
3211 if (dyn.d_tag == DT_NULL)
3212 break;
3213
3214 if (dyn.d_tag == DT_PPC64_GLINK)
3215 {
3216 /* The first glink stub starts at offset 32; see comment in
3217 ppc64_elf_finish_dynamic_sections. */
3218 glink_vma = dyn.d_un.d_val + 32;
3219 /* The .glink section usually does not survive the final
3220 link; search for the section (usually .text) where the
3221 glink stubs now reside. */
3222 glink = bfd_sections_find_if (abfd, section_covers_vma,
3223 &glink_vma);
3224 break;
3225 }
3226 }
3227
3228 free (dynbuf);
3229 }
3230
3231 if (glink != NULL)
3232 {
3233 /* Determine __glink trampoline by reading the relative branch
3234 from the first glink stub. */
3235 bfd_byte buf[4];
3236 if (bfd_get_section_contents (abfd, glink, buf,
3237 glink_vma + 4 - glink->vma, 4))
3238 {
3239 unsigned int insn = bfd_get_32 (abfd, buf);
3240 insn ^= B_DOT;
3241 if ((insn & ~0x3fffffc) == 0)
3242 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3243 }
3244
3245 if (resolv_vma)
3246 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3247
3248 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3249 if (relplt != NULL)
3250 {
3251 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3252 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3253 goto free_contents_and_exit;
3254
3255 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3256 size += plt_count * sizeof (asymbol);
3257
3258 p = relplt->relocation;
3259 for (i = 0; i < plt_count; i++, p++)
3260 {
3261 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3262 if (p->addend != 0)
3263 size += sizeof ("+0x") - 1 + 16;
3264 }
3265 }
3266 }
3267
3268 s = *ret = bfd_malloc (size);
3269 if (s == NULL)
3270 goto free_contents_and_exit;
3271
3272 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3273
3274 for (i = secsymend; i < opdsymend; ++i)
3275 {
3276 bfd_vma ent;
3277
3278 if (syms[i]->value > opd->size - 8)
3279 continue;
3280
3281 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3282 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3283 {
3284 long lo, hi;
3285 size_t len;
3286 asection *sec = abfd->sections;
3287
3288 *s = *syms[i];
3289 lo = codesecsym;
3290 hi = codesecsymend;
3291 while (lo < hi)
3292 {
3293 long mid = (lo + hi) >> 1;
3294 if (syms[mid]->section->vma < ent)
3295 lo = mid + 1;
3296 else if (syms[mid]->section->vma > ent)
3297 hi = mid;
3298 else
3299 {
3300 sec = syms[mid]->section;
3301 break;
3302 }
3303 }
3304
3305 if (lo >= hi && lo > codesecsym)
3306 sec = syms[lo - 1]->section;
3307
3308 for (; sec != NULL; sec = sec->next)
3309 {
3310 if (sec->vma > ent)
3311 break;
3312 /* SEC_LOAD may not be set if SEC is from a separate debug
3313 info file. */
3314 if ((sec->flags & SEC_ALLOC) == 0)
3315 break;
3316 if ((sec->flags & SEC_CODE) != 0)
3317 s->section = sec;
3318 }
3319 s->flags |= BSF_SYNTHETIC;
3320 s->value = ent - s->section->vma;
3321 s->name = names;
3322 *names++ = '.';
3323 len = strlen (syms[i]->name);
3324 memcpy (names, syms[i]->name, len + 1);
3325 names += len + 1;
3326 /* Have udata.p point back to the original symbol this
3327 synthetic symbol was derived from. */
3328 s->udata.p = syms[i];
3329 s++;
3330 }
3331 }
3332 free (contents);
3333
3334 if (glink != NULL && relplt != NULL)
3335 {
3336 if (resolv_vma)
3337 {
3338 /* Add a symbol for the main glink trampoline. */
3339 memset (s, 0, sizeof *s);
3340 s->the_bfd = abfd;
3341 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3342 s->section = glink;
3343 s->value = resolv_vma - glink->vma;
3344 s->name = names;
3345 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3346 names += sizeof ("__glink_PLTresolve");
3347 s++;
3348 count++;
3349 }
3350
3351 /* FIXME: It would be very much nicer to put sym@plt on the
3352 stub rather than on the glink branch table entry. The
3353 objdump disassembler would then use a sensible symbol
3354 name on plt calls. The difficulty in doing so is
3355 a) finding the stubs, and,
3356 b) matching stubs against plt entries, and,
3357 c) there can be multiple stubs for a given plt entry.
3358
3359 Solving (a) could be done by code scanning, but older
3360 ppc64 binaries used different stubs to current code.
3361 (b) is the tricky one since you need to known the toc
3362 pointer for at least one function that uses a pic stub to
3363 be able to calculate the plt address referenced.
3364 (c) means gdb would need to set multiple breakpoints (or
3365 find the glink branch itself) when setting breakpoints
3366 for pending shared library loads. */
3367 p = relplt->relocation;
3368 for (i = 0; i < plt_count; i++, p++)
3369 {
3370 size_t len;
3371
3372 *s = **p->sym_ptr_ptr;
3373 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3374 we are defining a symbol, ensure one of them is set. */
3375 if ((s->flags & BSF_LOCAL) == 0)
3376 s->flags |= BSF_GLOBAL;
3377 s->flags |= BSF_SYNTHETIC;
3378 s->section = glink;
3379 s->value = glink_vma - glink->vma;
3380 s->name = names;
3381 s->udata.p = NULL;
3382 len = strlen ((*p->sym_ptr_ptr)->name);
3383 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3384 names += len;
3385 if (p->addend != 0)
3386 {
3387 memcpy (names, "+0x", sizeof ("+0x") - 1);
3388 names += sizeof ("+0x") - 1;
3389 bfd_sprintf_vma (abfd, names, p->addend);
3390 names += strlen (names);
3391 }
3392 memcpy (names, "@plt", sizeof ("@plt"));
3393 names += sizeof ("@plt");
3394 s++;
3395 glink_vma += 8;
3396 if (i >= 0x8000)
3397 glink_vma += 4;
3398 }
3399 count += plt_count;
3400 }
3401 }
3402
3403 done:
3404 free (syms);
3405 return count;
3406 }
3407 \f
3408 /* The following functions are specific to the ELF linker, while
3409 functions above are used generally. Those named ppc64_elf_* are
3410 called by the main ELF linker code. They appear in this file more
3411 or less in the order in which they are called. eg.
3412 ppc64_elf_check_relocs is called early in the link process,
3413 ppc64_elf_finish_dynamic_sections is one of the last functions
3414 called.
3415
3416 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3417 functions have both a function code symbol and a function descriptor
3418 symbol. A call to foo in a relocatable object file looks like:
3419
3420 . .text
3421 . x:
3422 . bl .foo
3423 . nop
3424
3425 The function definition in another object file might be:
3426
3427 . .section .opd
3428 . foo: .quad .foo
3429 . .quad .TOC.@tocbase
3430 . .quad 0
3431 .
3432 . .text
3433 . .foo: blr
3434
3435 When the linker resolves the call during a static link, the branch
3436 unsurprisingly just goes to .foo and the .opd information is unused.
3437 If the function definition is in a shared library, things are a little
3438 different: The call goes via a plt call stub, the opd information gets
3439 copied to the plt, and the linker patches the nop.
3440
3441 . x:
3442 . bl .foo_stub
3443 . ld 2,40(1)
3444 .
3445 .
3446 . .foo_stub:
3447 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3448 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3449 . std 2,40(1) # this is the general idea
3450 . ld 11,0(12)
3451 . ld 2,8(12)
3452 . mtctr 11
3453 . ld 11,16(12)
3454 . bctr
3455 .
3456 . .section .plt
3457 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3458
3459 The "reloc ()" notation is supposed to indicate that the linker emits
3460 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3461 copying.
3462
3463 What are the difficulties here? Well, firstly, the relocations
3464 examined by the linker in check_relocs are against the function code
3465 sym .foo, while the dynamic relocation in the plt is emitted against
3466 the function descriptor symbol, foo. Somewhere along the line, we need
3467 to carefully copy dynamic link information from one symbol to the other.
3468 Secondly, the generic part of the elf linker will make .foo a dynamic
3469 symbol as is normal for most other backends. We need foo dynamic
3470 instead, at least for an application final link. However, when
3471 creating a shared library containing foo, we need to have both symbols
3472 dynamic so that references to .foo are satisfied during the early
3473 stages of linking. Otherwise the linker might decide to pull in a
3474 definition from some other object, eg. a static library.
3475
3476 Update: As of August 2004, we support a new convention. Function
3477 calls may use the function descriptor symbol, ie. "bl foo". This
3478 behaves exactly as "bl .foo". */
3479
3480 /* Of those relocs that might be copied as dynamic relocs, this function
3481 selects those that must be copied when linking a shared library,
3482 even when the symbol is local. */
3483
3484 static int
3485 must_be_dyn_reloc (struct bfd_link_info *info,
3486 enum elf_ppc64_reloc_type r_type)
3487 {
3488 switch (r_type)
3489 {
3490 default:
3491 return 1;
3492
3493 case R_PPC64_REL32:
3494 case R_PPC64_REL64:
3495 case R_PPC64_REL30:
3496 return 0;
3497
3498 case R_PPC64_TPREL16:
3499 case R_PPC64_TPREL16_LO:
3500 case R_PPC64_TPREL16_HI:
3501 case R_PPC64_TPREL16_HA:
3502 case R_PPC64_TPREL16_DS:
3503 case R_PPC64_TPREL16_LO_DS:
3504 case R_PPC64_TPREL16_HIGHER:
3505 case R_PPC64_TPREL16_HIGHERA:
3506 case R_PPC64_TPREL16_HIGHEST:
3507 case R_PPC64_TPREL16_HIGHESTA:
3508 case R_PPC64_TPREL64:
3509 return !info->executable;
3510 }
3511 }
3512
3513 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3514 copying dynamic variables from a shared lib into an app's dynbss
3515 section, and instead use a dynamic relocation to point into the
3516 shared lib. With code that gcc generates, it's vital that this be
3517 enabled; In the PowerPC64 ABI, the address of a function is actually
3518 the address of a function descriptor, which resides in the .opd
3519 section. gcc uses the descriptor directly rather than going via the
3520 GOT as some other ABI's do, which means that initialized function
3521 pointers must reference the descriptor. Thus, a function pointer
3522 initialized to the address of a function in a shared library will
3523 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3524 redefines the function descriptor symbol to point to the copy. This
3525 presents a problem as a plt entry for that function is also
3526 initialized from the function descriptor symbol and the copy reloc
3527 may not be initialized first. */
3528 #define ELIMINATE_COPY_RELOCS 1
3529
3530 /* Section name for stubs is the associated section name plus this
3531 string. */
3532 #define STUB_SUFFIX ".stub"
3533
3534 /* Linker stubs.
3535 ppc_stub_long_branch:
3536 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3537 destination, but a 24 bit branch in a stub section will reach.
3538 . b dest
3539
3540 ppc_stub_plt_branch:
3541 Similar to the above, but a 24 bit branch in the stub section won't
3542 reach its destination.
3543 . addis %r12,%r2,xxx@toc@ha
3544 . ld %r11,xxx@toc@l(%r12)
3545 . mtctr %r11
3546 . bctr
3547
3548 ppc_stub_plt_call:
3549 Used to call a function in a shared library. If it so happens that
3550 the plt entry referenced crosses a 64k boundary, then an extra
3551 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3552 . addis %r12,%r2,xxx@toc@ha
3553 . std %r2,40(%r1)
3554 . ld %r11,xxx+0@toc@l(%r12)
3555 . mtctr %r11
3556 . ld %r2,xxx+8@toc@l(%r12)
3557 . ld %r11,xxx+16@toc@l(%r12)
3558 . bctr
3559
3560 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3561 code to adjust the value and save r2 to support multiple toc sections.
3562 A ppc_stub_long_branch with an r2 offset looks like:
3563 . std %r2,40(%r1)
3564 . addis %r2,%r2,off@ha
3565 . addi %r2,%r2,off@l
3566 . b dest
3567
3568 A ppc_stub_plt_branch with an r2 offset looks like:
3569 . std %r2,40(%r1)
3570 . addis %r12,%r2,xxx@toc@ha
3571 . ld %r11,xxx@toc@l(%r12)
3572 . addis %r2,%r2,off@ha
3573 . addi %r2,%r2,off@l
3574 . mtctr %r11
3575 . bctr
3576
3577 In cases where the "addis" instruction would add zero, the "addis" is
3578 omitted and following instructions modified slightly in some cases.
3579 */
3580
3581 enum ppc_stub_type {
3582 ppc_stub_none,
3583 ppc_stub_long_branch,
3584 ppc_stub_long_branch_r2off,
3585 ppc_stub_plt_branch,
3586 ppc_stub_plt_branch_r2off,
3587 ppc_stub_plt_call
3588 };
3589
3590 struct ppc_stub_hash_entry {
3591
3592 /* Base hash table entry structure. */
3593 struct bfd_hash_entry root;
3594
3595 enum ppc_stub_type stub_type;
3596
3597 /* The stub section. */
3598 asection *stub_sec;
3599
3600 /* Offset within stub_sec of the beginning of this stub. */
3601 bfd_vma stub_offset;
3602
3603 /* Given the symbol's value and its section we can determine its final
3604 value when building the stubs (so the stub knows where to jump. */
3605 bfd_vma target_value;
3606 asection *target_section;
3607
3608 /* The symbol table entry, if any, that this was derived from. */
3609 struct ppc_link_hash_entry *h;
3610 struct plt_entry *plt_ent;
3611
3612 /* And the reloc addend that this was derived from. */
3613 bfd_vma addend;
3614
3615 /* Where this stub is being called from, or, in the case of combined
3616 stub sections, the first input section in the group. */
3617 asection *id_sec;
3618 };
3619
3620 struct ppc_branch_hash_entry {
3621
3622 /* Base hash table entry structure. */
3623 struct bfd_hash_entry root;
3624
3625 /* Offset within branch lookup table. */
3626 unsigned int offset;
3627
3628 /* Generation marker. */
3629 unsigned int iter;
3630 };
3631
3632 struct ppc_link_hash_entry
3633 {
3634 struct elf_link_hash_entry elf;
3635
3636 union {
3637 /* A pointer to the most recently used stub hash entry against this
3638 symbol. */
3639 struct ppc_stub_hash_entry *stub_cache;
3640
3641 /* A pointer to the next symbol starting with a '.' */
3642 struct ppc_link_hash_entry *next_dot_sym;
3643 } u;
3644
3645 /* Track dynamic relocs copied for this symbol. */
3646 struct elf_dyn_relocs *dyn_relocs;
3647
3648 /* Link between function code and descriptor symbols. */
3649 struct ppc_link_hash_entry *oh;
3650
3651 /* Flag function code and descriptor symbols. */
3652 unsigned int is_func:1;
3653 unsigned int is_func_descriptor:1;
3654 unsigned int fake:1;
3655
3656 /* Whether global opd/toc sym has been adjusted or not.
3657 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3658 should be set for all globals defined in any opd/toc section. */
3659 unsigned int adjust_done:1;
3660
3661 /* Set if we twiddled this symbol to weak at some stage. */
3662 unsigned int was_undefined:1;
3663
3664 /* Contexts in which symbol is used in the GOT (or TOC).
3665 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3666 corresponding relocs are encountered during check_relocs.
3667 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3668 indicate the corresponding GOT entry type is not needed.
3669 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3670 a TPREL one. We use a separate flag rather than setting TPREL
3671 just for convenience in distinguishing the two cases. */
3672 #define TLS_GD 1 /* GD reloc. */
3673 #define TLS_LD 2 /* LD reloc. */
3674 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3675 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3676 #define TLS_TLS 16 /* Any TLS reloc. */
3677 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3678 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3679 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3680 unsigned char tls_mask;
3681 };
3682
3683 /* ppc64 ELF linker hash table. */
3684
3685 struct ppc_link_hash_table
3686 {
3687 struct elf_link_hash_table elf;
3688
3689 /* The stub hash table. */
3690 struct bfd_hash_table stub_hash_table;
3691
3692 /* Another hash table for plt_branch stubs. */
3693 struct bfd_hash_table branch_hash_table;
3694
3695 /* Hash table for function prologue tocsave. */
3696 htab_t tocsave_htab;
3697
3698 /* Linker stub bfd. */
3699 bfd *stub_bfd;
3700
3701 /* Linker call-backs. */
3702 asection * (*add_stub_section) (const char *, asection *);
3703 void (*layout_sections_again) (void);
3704
3705 /* Array to keep track of which stub sections have been created, and
3706 information on stub grouping. */
3707 struct map_stub {
3708 /* This is the section to which stubs in the group will be attached. */
3709 asection *link_sec;
3710 /* The stub section. */
3711 asection *stub_sec;
3712 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3713 bfd_vma toc_off;
3714 } *stub_group;
3715
3716 /* Temp used when calculating TOC pointers. */
3717 bfd_vma toc_curr;
3718 bfd *toc_bfd;
3719 asection *toc_first_sec;
3720
3721 /* Highest input section id. */
3722 int top_id;
3723
3724 /* Highest output section index. */
3725 int top_index;
3726
3727 /* Used when adding symbols. */
3728 struct ppc_link_hash_entry *dot_syms;
3729
3730 /* List of input sections for each output section. */
3731 asection **input_list;
3732
3733 /* Short-cuts to get to dynamic linker sections. */
3734 asection *got;
3735 asection *plt;
3736 asection *relplt;
3737 asection *iplt;
3738 asection *reliplt;
3739 asection *dynbss;
3740 asection *relbss;
3741 asection *glink;
3742 asection *sfpr;
3743 asection *brlt;
3744 asection *relbrlt;
3745 asection *glink_eh_frame;
3746
3747 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3748 struct ppc_link_hash_entry *tls_get_addr;
3749 struct ppc_link_hash_entry *tls_get_addr_fd;
3750
3751 /* The size of reliplt used by got entry relocs. */
3752 bfd_size_type got_reli_size;
3753
3754 /* Statistics. */
3755 unsigned long stub_count[ppc_stub_plt_call];
3756
3757 /* Number of stubs against global syms. */
3758 unsigned long stub_globals;
3759
3760 /* Set if PLT call stubs should load r11. */
3761 unsigned int plt_static_chain:1;
3762
3763 /* Set if we should emit symbols for stubs. */
3764 unsigned int emit_stub_syms:1;
3765
3766 /* Set if __tls_get_addr optimization should not be done. */
3767 unsigned int no_tls_get_addr_opt:1;
3768
3769 /* Support for multiple toc sections. */
3770 unsigned int do_multi_toc:1;
3771 unsigned int multi_toc_needed:1;
3772 unsigned int second_toc_pass:1;
3773 unsigned int do_toc_opt:1;
3774
3775 /* Set on error. */
3776 unsigned int stub_error:1;
3777
3778 /* Temp used by ppc64_elf_process_dot_syms. */
3779 unsigned int twiddled_syms:1;
3780
3781 /* Incremented every time we size stubs. */
3782 unsigned int stub_iteration;
3783
3784 /* Small local sym cache. */
3785 struct sym_cache sym_cache;
3786 };
3787
3788 /* Rename some of the generic section flags to better document how they
3789 are used here. */
3790
3791 /* Nonzero if this section has TLS related relocations. */
3792 #define has_tls_reloc sec_flg0
3793
3794 /* Nonzero if this section has a call to __tls_get_addr. */
3795 #define has_tls_get_addr_call sec_flg1
3796
3797 /* Nonzero if this section has any toc or got relocs. */
3798 #define has_toc_reloc sec_flg2
3799
3800 /* Nonzero if this section has a call to another section that uses
3801 the toc or got. */
3802 #define makes_toc_func_call sec_flg3
3803
3804 /* Recursion protection when determining above flag. */
3805 #define call_check_in_progress sec_flg4
3806 #define call_check_done sec_flg5
3807
3808 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3809
3810 #define ppc_hash_table(p) \
3811 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3812 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3813
3814 #define ppc_stub_hash_lookup(table, string, create, copy) \
3815 ((struct ppc_stub_hash_entry *) \
3816 bfd_hash_lookup ((table), (string), (create), (copy)))
3817
3818 #define ppc_branch_hash_lookup(table, string, create, copy) \
3819 ((struct ppc_branch_hash_entry *) \
3820 bfd_hash_lookup ((table), (string), (create), (copy)))
3821
3822 /* Create an entry in the stub hash table. */
3823
3824 static struct bfd_hash_entry *
3825 stub_hash_newfunc (struct bfd_hash_entry *entry,
3826 struct bfd_hash_table *table,
3827 const char *string)
3828 {
3829 /* Allocate the structure if it has not already been allocated by a
3830 subclass. */
3831 if (entry == NULL)
3832 {
3833 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3834 if (entry == NULL)
3835 return entry;
3836 }
3837
3838 /* Call the allocation method of the superclass. */
3839 entry = bfd_hash_newfunc (entry, table, string);
3840 if (entry != NULL)
3841 {
3842 struct ppc_stub_hash_entry *eh;
3843
3844 /* Initialize the local fields. */
3845 eh = (struct ppc_stub_hash_entry *) entry;
3846 eh->stub_type = ppc_stub_none;
3847 eh->stub_sec = NULL;
3848 eh->stub_offset = 0;
3849 eh->target_value = 0;
3850 eh->target_section = NULL;
3851 eh->h = NULL;
3852 eh->id_sec = NULL;
3853 }
3854
3855 return entry;
3856 }
3857
3858 /* Create an entry in the branch hash table. */
3859
3860 static struct bfd_hash_entry *
3861 branch_hash_newfunc (struct bfd_hash_entry *entry,
3862 struct bfd_hash_table *table,
3863 const char *string)
3864 {
3865 /* Allocate the structure if it has not already been allocated by a
3866 subclass. */
3867 if (entry == NULL)
3868 {
3869 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3870 if (entry == NULL)
3871 return entry;
3872 }
3873
3874 /* Call the allocation method of the superclass. */
3875 entry = bfd_hash_newfunc (entry, table, string);
3876 if (entry != NULL)
3877 {
3878 struct ppc_branch_hash_entry *eh;
3879
3880 /* Initialize the local fields. */
3881 eh = (struct ppc_branch_hash_entry *) entry;
3882 eh->offset = 0;
3883 eh->iter = 0;
3884 }
3885
3886 return entry;
3887 }
3888
3889 /* Create an entry in a ppc64 ELF linker hash table. */
3890
3891 static struct bfd_hash_entry *
3892 link_hash_newfunc (struct bfd_hash_entry *entry,
3893 struct bfd_hash_table *table,
3894 const char *string)
3895 {
3896 /* Allocate the structure if it has not already been allocated by a
3897 subclass. */
3898 if (entry == NULL)
3899 {
3900 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3901 if (entry == NULL)
3902 return entry;
3903 }
3904
3905 /* Call the allocation method of the superclass. */
3906 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3907 if (entry != NULL)
3908 {
3909 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3910
3911 memset (&eh->u.stub_cache, 0,
3912 (sizeof (struct ppc_link_hash_entry)
3913 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3914
3915 /* When making function calls, old ABI code references function entry
3916 points (dot symbols), while new ABI code references the function
3917 descriptor symbol. We need to make any combination of reference and
3918 definition work together, without breaking archive linking.
3919
3920 For a defined function "foo" and an undefined call to "bar":
3921 An old object defines "foo" and ".foo", references ".bar" (possibly
3922 "bar" too).
3923 A new object defines "foo" and references "bar".
3924
3925 A new object thus has no problem with its undefined symbols being
3926 satisfied by definitions in an old object. On the other hand, the
3927 old object won't have ".bar" satisfied by a new object.
3928
3929 Keep a list of newly added dot-symbols. */
3930
3931 if (string[0] == '.')
3932 {
3933 struct ppc_link_hash_table *htab;
3934
3935 htab = (struct ppc_link_hash_table *) table;
3936 eh->u.next_dot_sym = htab->dot_syms;
3937 htab->dot_syms = eh;
3938 }
3939 }
3940
3941 return entry;
3942 }
3943
3944 struct tocsave_entry {
3945 asection *sec;
3946 bfd_vma offset;
3947 };
3948
3949 static hashval_t
3950 tocsave_htab_hash (const void *p)
3951 {
3952 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3953 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3954 }
3955
3956 static int
3957 tocsave_htab_eq (const void *p1, const void *p2)
3958 {
3959 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3960 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3961 return e1->sec == e2->sec && e1->offset == e2->offset;
3962 }
3963
3964 /* Create a ppc64 ELF linker hash table. */
3965
3966 static struct bfd_link_hash_table *
3967 ppc64_elf_link_hash_table_create (bfd *abfd)
3968 {
3969 struct ppc_link_hash_table *htab;
3970 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3971
3972 htab = bfd_zmalloc (amt);
3973 if (htab == NULL)
3974 return NULL;
3975
3976 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3977 sizeof (struct ppc_link_hash_entry),
3978 PPC64_ELF_DATA))
3979 {
3980 free (htab);
3981 return NULL;
3982 }
3983
3984 /* Init the stub hash table too. */
3985 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3986 sizeof (struct ppc_stub_hash_entry)))
3987 return NULL;
3988
3989 /* And the branch hash table. */
3990 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3991 sizeof (struct ppc_branch_hash_entry)))
3992 return NULL;
3993
3994 htab->tocsave_htab = htab_try_create (1024,
3995 tocsave_htab_hash,
3996 tocsave_htab_eq,
3997 NULL);
3998 if (htab->tocsave_htab == NULL)
3999 return NULL;
4000
4001 /* Initializing two fields of the union is just cosmetic. We really
4002 only care about glist, but when compiled on a 32-bit host the
4003 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4004 debugger inspection of these fields look nicer. */
4005 htab->elf.init_got_refcount.refcount = 0;
4006 htab->elf.init_got_refcount.glist = NULL;
4007 htab->elf.init_plt_refcount.refcount = 0;
4008 htab->elf.init_plt_refcount.glist = NULL;
4009 htab->elf.init_got_offset.offset = 0;
4010 htab->elf.init_got_offset.glist = NULL;
4011 htab->elf.init_plt_offset.offset = 0;
4012 htab->elf.init_plt_offset.glist = NULL;
4013
4014 return &htab->elf.root;
4015 }
4016
4017 /* Free the derived linker hash table. */
4018
4019 static void
4020 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4021 {
4022 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4023
4024 bfd_hash_table_free (&htab->stub_hash_table);
4025 bfd_hash_table_free (&htab->branch_hash_table);
4026 if (htab->tocsave_htab)
4027 htab_delete (htab->tocsave_htab);
4028 _bfd_generic_link_hash_table_free (hash);
4029 }
4030
4031 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4032
4033 void
4034 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4035 {
4036 struct ppc_link_hash_table *htab;
4037
4038 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4039
4040 /* Always hook our dynamic sections into the first bfd, which is the
4041 linker created stub bfd. This ensures that the GOT header is at
4042 the start of the output TOC section. */
4043 htab = ppc_hash_table (info);
4044 if (htab == NULL)
4045 return;
4046 htab->stub_bfd = abfd;
4047 htab->elf.dynobj = abfd;
4048 }
4049
4050 /* Build a name for an entry in the stub hash table. */
4051
4052 static char *
4053 ppc_stub_name (const asection *input_section,
4054 const asection *sym_sec,
4055 const struct ppc_link_hash_entry *h,
4056 const Elf_Internal_Rela *rel)
4057 {
4058 char *stub_name;
4059 bfd_size_type len;
4060
4061 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4062 offsets from a sym as a branch target? In fact, we could
4063 probably assume the addend is always zero. */
4064 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4065
4066 if (h)
4067 {
4068 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4069 stub_name = bfd_malloc (len);
4070 if (stub_name == NULL)
4071 return stub_name;
4072
4073 sprintf (stub_name, "%08x.%s+%x",
4074 input_section->id & 0xffffffff,
4075 h->elf.root.root.string,
4076 (int) rel->r_addend & 0xffffffff);
4077 }
4078 else
4079 {
4080 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4081 stub_name = bfd_malloc (len);
4082 if (stub_name == NULL)
4083 return stub_name;
4084
4085 sprintf (stub_name, "%08x.%x:%x+%x",
4086 input_section->id & 0xffffffff,
4087 sym_sec->id & 0xffffffff,
4088 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4089 (int) rel->r_addend & 0xffffffff);
4090 }
4091 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4092 stub_name[len - 2] = 0;
4093 return stub_name;
4094 }
4095
4096 /* Look up an entry in the stub hash. Stub entries are cached because
4097 creating the stub name takes a bit of time. */
4098
4099 static struct ppc_stub_hash_entry *
4100 ppc_get_stub_entry (const asection *input_section,
4101 const asection *sym_sec,
4102 struct ppc_link_hash_entry *h,
4103 const Elf_Internal_Rela *rel,
4104 struct ppc_link_hash_table *htab)
4105 {
4106 struct ppc_stub_hash_entry *stub_entry;
4107 const asection *id_sec;
4108
4109 /* If this input section is part of a group of sections sharing one
4110 stub section, then use the id of the first section in the group.
4111 Stub names need to include a section id, as there may well be
4112 more than one stub used to reach say, printf, and we need to
4113 distinguish between them. */
4114 id_sec = htab->stub_group[input_section->id].link_sec;
4115
4116 if (h != NULL && h->u.stub_cache != NULL
4117 && h->u.stub_cache->h == h
4118 && h->u.stub_cache->id_sec == id_sec)
4119 {
4120 stub_entry = h->u.stub_cache;
4121 }
4122 else
4123 {
4124 char *stub_name;
4125
4126 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4127 if (stub_name == NULL)
4128 return NULL;
4129
4130 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4131 stub_name, FALSE, FALSE);
4132 if (h != NULL)
4133 h->u.stub_cache = stub_entry;
4134
4135 free (stub_name);
4136 }
4137
4138 return stub_entry;
4139 }
4140
4141 /* Add a new stub entry to the stub hash. Not all fields of the new
4142 stub entry are initialised. */
4143
4144 static struct ppc_stub_hash_entry *
4145 ppc_add_stub (const char *stub_name,
4146 asection *section,
4147 struct bfd_link_info *info)
4148 {
4149 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4150 asection *link_sec;
4151 asection *stub_sec;
4152 struct ppc_stub_hash_entry *stub_entry;
4153
4154 link_sec = htab->stub_group[section->id].link_sec;
4155 stub_sec = htab->stub_group[section->id].stub_sec;
4156 if (stub_sec == NULL)
4157 {
4158 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4159 if (stub_sec == NULL)
4160 {
4161 size_t namelen;
4162 bfd_size_type len;
4163 char *s_name;
4164
4165 namelen = strlen (link_sec->name);
4166 len = namelen + sizeof (STUB_SUFFIX);
4167 s_name = bfd_alloc (htab->stub_bfd, len);
4168 if (s_name == NULL)
4169 return NULL;
4170
4171 memcpy (s_name, link_sec->name, namelen);
4172 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4173 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4174 if (stub_sec == NULL)
4175 return NULL;
4176 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4177 }
4178 htab->stub_group[section->id].stub_sec = stub_sec;
4179 }
4180
4181 /* Enter this entry into the linker stub hash table. */
4182 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4183 TRUE, FALSE);
4184 if (stub_entry == NULL)
4185 {
4186 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4187 section->owner, stub_name);
4188 return NULL;
4189 }
4190
4191 stub_entry->stub_sec = stub_sec;
4192 stub_entry->stub_offset = 0;
4193 stub_entry->id_sec = link_sec;
4194 return stub_entry;
4195 }
4196
4197 /* Create sections for linker generated code. */
4198
4199 static bfd_boolean
4200 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4201 {
4202 struct ppc_link_hash_table *htab;
4203 flagword flags;
4204
4205 htab = ppc_hash_table (info);
4206 if (htab == NULL)
4207 return FALSE;
4208
4209 /* Create .sfpr for code to save and restore fp regs. */
4210 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4211 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4212 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4213 flags);
4214 if (htab->sfpr == NULL
4215 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4216 return FALSE;
4217
4218 /* Create .glink for lazy dynamic linking support. */
4219 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4220 flags);
4221 if (htab->glink == NULL
4222 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4223 return FALSE;
4224
4225 if (!info->no_ld_generated_unwind_info)
4226 {
4227 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4228 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4229 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4230 ".eh_frame",
4231 flags);
4232 if (htab->glink_eh_frame == NULL
4233 || !bfd_set_section_alignment (abfd, htab->glink_eh_frame, 2))
4234 return FALSE;
4235 }
4236
4237 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4238 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4239 if (htab->iplt == NULL
4240 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4241 return FALSE;
4242
4243 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4244 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4245 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4246 ".rela.iplt",
4247 flags);
4248 if (htab->reliplt == NULL
4249 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4250 return FALSE;
4251
4252 /* Create branch lookup table for plt_branch stubs. */
4253 flags = (SEC_ALLOC | SEC_LOAD
4254 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4255 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4256 flags);
4257 if (htab->brlt == NULL
4258 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4259 return FALSE;
4260
4261 if (!info->shared)
4262 return TRUE;
4263
4264 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4265 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4266 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4267 ".rela.branch_lt",
4268 flags);
4269 if (htab->relbrlt == NULL
4270 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4271 return FALSE;
4272
4273 return TRUE;
4274 }
4275
4276 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4277 not already done. */
4278
4279 static bfd_boolean
4280 create_got_section (bfd *abfd, struct bfd_link_info *info)
4281 {
4282 asection *got, *relgot;
4283 flagword flags;
4284 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4285
4286 if (!is_ppc64_elf (abfd))
4287 return FALSE;
4288 if (htab == NULL)
4289 return FALSE;
4290
4291 if (!htab->got)
4292 {
4293 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4294 return FALSE;
4295
4296 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4297 if (!htab->got)
4298 abort ();
4299 }
4300
4301 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4302 | SEC_LINKER_CREATED);
4303
4304 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4305 if (!got
4306 || !bfd_set_section_alignment (abfd, got, 3))
4307 return FALSE;
4308
4309 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4310 flags | SEC_READONLY);
4311 if (!relgot
4312 || ! bfd_set_section_alignment (abfd, relgot, 3))
4313 return FALSE;
4314
4315 ppc64_elf_tdata (abfd)->got = got;
4316 ppc64_elf_tdata (abfd)->relgot = relgot;
4317 return TRUE;
4318 }
4319
4320 /* Create the dynamic sections, and set up shortcuts. */
4321
4322 static bfd_boolean
4323 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4324 {
4325 struct ppc_link_hash_table *htab;
4326
4327 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4328 return FALSE;
4329
4330 htab = ppc_hash_table (info);
4331 if (htab == NULL)
4332 return FALSE;
4333
4334 if (!htab->got)
4335 htab->got = bfd_get_section_by_name (dynobj, ".got");
4336 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4337 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4338 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4339 if (!info->shared)
4340 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4341
4342 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4343 || (!info->shared && !htab->relbss))
4344 abort ();
4345
4346 return TRUE;
4347 }
4348
4349 /* Follow indirect and warning symbol links. */
4350
4351 static inline struct bfd_link_hash_entry *
4352 follow_link (struct bfd_link_hash_entry *h)
4353 {
4354 while (h->type == bfd_link_hash_indirect
4355 || h->type == bfd_link_hash_warning)
4356 h = h->u.i.link;
4357 return h;
4358 }
4359
4360 static inline struct elf_link_hash_entry *
4361 elf_follow_link (struct elf_link_hash_entry *h)
4362 {
4363 return (struct elf_link_hash_entry *) follow_link (&h->root);
4364 }
4365
4366 static inline struct ppc_link_hash_entry *
4367 ppc_follow_link (struct ppc_link_hash_entry *h)
4368 {
4369 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4370 }
4371
4372 /* Merge PLT info on FROM with that on TO. */
4373
4374 static void
4375 move_plt_plist (struct ppc_link_hash_entry *from,
4376 struct ppc_link_hash_entry *to)
4377 {
4378 if (from->elf.plt.plist != NULL)
4379 {
4380 if (to->elf.plt.plist != NULL)
4381 {
4382 struct plt_entry **entp;
4383 struct plt_entry *ent;
4384
4385 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4386 {
4387 struct plt_entry *dent;
4388
4389 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4390 if (dent->addend == ent->addend)
4391 {
4392 dent->plt.refcount += ent->plt.refcount;
4393 *entp = ent->next;
4394 break;
4395 }
4396 if (dent == NULL)
4397 entp = &ent->next;
4398 }
4399 *entp = to->elf.plt.plist;
4400 }
4401
4402 to->elf.plt.plist = from->elf.plt.plist;
4403 from->elf.plt.plist = NULL;
4404 }
4405 }
4406
4407 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4408
4409 static void
4410 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4411 struct elf_link_hash_entry *dir,
4412 struct elf_link_hash_entry *ind)
4413 {
4414 struct ppc_link_hash_entry *edir, *eind;
4415
4416 edir = (struct ppc_link_hash_entry *) dir;
4417 eind = (struct ppc_link_hash_entry *) ind;
4418
4419 edir->is_func |= eind->is_func;
4420 edir->is_func_descriptor |= eind->is_func_descriptor;
4421 edir->tls_mask |= eind->tls_mask;
4422 if (eind->oh != NULL)
4423 edir->oh = ppc_follow_link (eind->oh);
4424
4425 /* If called to transfer flags for a weakdef during processing
4426 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4427 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4428 if (!(ELIMINATE_COPY_RELOCS
4429 && eind->elf.root.type != bfd_link_hash_indirect
4430 && edir->elf.dynamic_adjusted))
4431 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4432
4433 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4434 edir->elf.ref_regular |= eind->elf.ref_regular;
4435 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4436 edir->elf.needs_plt |= eind->elf.needs_plt;
4437
4438 /* If we were called to copy over info for a weak sym, that's all. */
4439 if (eind->elf.root.type != bfd_link_hash_indirect)
4440 return;
4441
4442 /* Copy over any dynamic relocs we may have on the indirect sym. */
4443 if (eind->dyn_relocs != NULL)
4444 {
4445 if (edir->dyn_relocs != NULL)
4446 {
4447 struct elf_dyn_relocs **pp;
4448 struct elf_dyn_relocs *p;
4449
4450 /* Add reloc counts against the indirect sym to the direct sym
4451 list. Merge any entries against the same section. */
4452 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4453 {
4454 struct elf_dyn_relocs *q;
4455
4456 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4457 if (q->sec == p->sec)
4458 {
4459 q->pc_count += p->pc_count;
4460 q->count += p->count;
4461 *pp = p->next;
4462 break;
4463 }
4464 if (q == NULL)
4465 pp = &p->next;
4466 }
4467 *pp = edir->dyn_relocs;
4468 }
4469
4470 edir->dyn_relocs = eind->dyn_relocs;
4471 eind->dyn_relocs = NULL;
4472 }
4473
4474 /* Copy over got entries that we may have already seen to the
4475 symbol which just became indirect. */
4476 if (eind->elf.got.glist != NULL)
4477 {
4478 if (edir->elf.got.glist != NULL)
4479 {
4480 struct got_entry **entp;
4481 struct got_entry *ent;
4482
4483 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4484 {
4485 struct got_entry *dent;
4486
4487 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4488 if (dent->addend == ent->addend
4489 && dent->owner == ent->owner
4490 && dent->tls_type == ent->tls_type)
4491 {
4492 dent->got.refcount += ent->got.refcount;
4493 *entp = ent->next;
4494 break;
4495 }
4496 if (dent == NULL)
4497 entp = &ent->next;
4498 }
4499 *entp = edir->elf.got.glist;
4500 }
4501
4502 edir->elf.got.glist = eind->elf.got.glist;
4503 eind->elf.got.glist = NULL;
4504 }
4505
4506 /* And plt entries. */
4507 move_plt_plist (eind, edir);
4508
4509 if (eind->elf.dynindx != -1)
4510 {
4511 if (edir->elf.dynindx != -1)
4512 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4513 edir->elf.dynstr_index);
4514 edir->elf.dynindx = eind->elf.dynindx;
4515 edir->elf.dynstr_index = eind->elf.dynstr_index;
4516 eind->elf.dynindx = -1;
4517 eind->elf.dynstr_index = 0;
4518 }
4519 }
4520
4521 /* Find the function descriptor hash entry from the given function code
4522 hash entry FH. Link the entries via their OH fields. */
4523
4524 static struct ppc_link_hash_entry *
4525 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4526 {
4527 struct ppc_link_hash_entry *fdh = fh->oh;
4528
4529 if (fdh == NULL)
4530 {
4531 const char *fd_name = fh->elf.root.root.string + 1;
4532
4533 fdh = (struct ppc_link_hash_entry *)
4534 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4535 if (fdh == NULL)
4536 return fdh;
4537
4538 fdh->is_func_descriptor = 1;
4539 fdh->oh = fh;
4540 fh->is_func = 1;
4541 fh->oh = fdh;
4542 }
4543
4544 return ppc_follow_link (fdh);
4545 }
4546
4547 /* Make a fake function descriptor sym for the code sym FH. */
4548
4549 static struct ppc_link_hash_entry *
4550 make_fdh (struct bfd_link_info *info,
4551 struct ppc_link_hash_entry *fh)
4552 {
4553 bfd *abfd;
4554 asymbol *newsym;
4555 struct bfd_link_hash_entry *bh;
4556 struct ppc_link_hash_entry *fdh;
4557
4558 abfd = fh->elf.root.u.undef.abfd;
4559 newsym = bfd_make_empty_symbol (abfd);
4560 newsym->name = fh->elf.root.root.string + 1;
4561 newsym->section = bfd_und_section_ptr;
4562 newsym->value = 0;
4563 newsym->flags = BSF_WEAK;
4564
4565 bh = NULL;
4566 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4567 newsym->flags, newsym->section,
4568 newsym->value, NULL, FALSE, FALSE,
4569 &bh))
4570 return NULL;
4571
4572 fdh = (struct ppc_link_hash_entry *) bh;
4573 fdh->elf.non_elf = 0;
4574 fdh->fake = 1;
4575 fdh->is_func_descriptor = 1;
4576 fdh->oh = fh;
4577 fh->is_func = 1;
4578 fh->oh = fdh;
4579 return fdh;
4580 }
4581
4582 /* Fix function descriptor symbols defined in .opd sections to be
4583 function type. */
4584
4585 static bfd_boolean
4586 ppc64_elf_add_symbol_hook (bfd *ibfd,
4587 struct bfd_link_info *info,
4588 Elf_Internal_Sym *isym,
4589 const char **name ATTRIBUTE_UNUSED,
4590 flagword *flags ATTRIBUTE_UNUSED,
4591 asection **sec,
4592 bfd_vma *value ATTRIBUTE_UNUSED)
4593 {
4594 if ((ibfd->flags & DYNAMIC) == 0
4595 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4596 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4597
4598 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4599 {
4600 if ((ibfd->flags & DYNAMIC) == 0)
4601 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4602 }
4603 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4604 ;
4605 else if (*sec != NULL
4606 && strcmp ((*sec)->name, ".opd") == 0)
4607 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4608
4609 return TRUE;
4610 }
4611
4612 /* This function makes an old ABI object reference to ".bar" cause the
4613 inclusion of a new ABI object archive that defines "bar".
4614 NAME is a symbol defined in an archive. Return a symbol in the hash
4615 table that might be satisfied by the archive symbols. */
4616
4617 static struct elf_link_hash_entry *
4618 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4619 struct bfd_link_info *info,
4620 const char *name)
4621 {
4622 struct elf_link_hash_entry *h;
4623 char *dot_name;
4624 size_t len;
4625
4626 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4627 if (h != NULL
4628 /* Don't return this sym if it is a fake function descriptor
4629 created by add_symbol_adjust. */
4630 && !(h->root.type == bfd_link_hash_undefweak
4631 && ((struct ppc_link_hash_entry *) h)->fake))
4632 return h;
4633
4634 if (name[0] == '.')
4635 return h;
4636
4637 len = strlen (name);
4638 dot_name = bfd_alloc (abfd, len + 2);
4639 if (dot_name == NULL)
4640 return (struct elf_link_hash_entry *) 0 - 1;
4641 dot_name[0] = '.';
4642 memcpy (dot_name + 1, name, len + 1);
4643 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4644 bfd_release (abfd, dot_name);
4645 return h;
4646 }
4647
4648 /* This function satisfies all old ABI object references to ".bar" if a
4649 new ABI object defines "bar". Well, at least, undefined dot symbols
4650 are made weak. This stops later archive searches from including an
4651 object if we already have a function descriptor definition. It also
4652 prevents the linker complaining about undefined symbols.
4653 We also check and correct mismatched symbol visibility here. The
4654 most restrictive visibility of the function descriptor and the
4655 function entry symbol is used. */
4656
4657 static bfd_boolean
4658 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4659 {
4660 struct ppc_link_hash_table *htab;
4661 struct ppc_link_hash_entry *fdh;
4662
4663 if (eh->elf.root.type == bfd_link_hash_indirect)
4664 return TRUE;
4665
4666 if (eh->elf.root.type == bfd_link_hash_warning)
4667 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4668
4669 if (eh->elf.root.root.string[0] != '.')
4670 abort ();
4671
4672 htab = ppc_hash_table (info);
4673 if (htab == NULL)
4674 return FALSE;
4675
4676 fdh = lookup_fdh (eh, htab);
4677 if (fdh == NULL)
4678 {
4679 if (!info->relocatable
4680 && (eh->elf.root.type == bfd_link_hash_undefined
4681 || eh->elf.root.type == bfd_link_hash_undefweak)
4682 && eh->elf.ref_regular)
4683 {
4684 /* Make an undefweak function descriptor sym, which is enough to
4685 pull in an --as-needed shared lib, but won't cause link
4686 errors. Archives are handled elsewhere. */
4687 fdh = make_fdh (info, eh);
4688 if (fdh == NULL)
4689 return FALSE;
4690 fdh->elf.ref_regular = 1;
4691 }
4692 }
4693 else
4694 {
4695 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4696 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4697 if (entry_vis < descr_vis)
4698 fdh->elf.other += entry_vis - descr_vis;
4699 else if (entry_vis > descr_vis)
4700 eh->elf.other += descr_vis - entry_vis;
4701
4702 if ((fdh->elf.root.type == bfd_link_hash_defined
4703 || fdh->elf.root.type == bfd_link_hash_defweak)
4704 && eh->elf.root.type == bfd_link_hash_undefined)
4705 {
4706 eh->elf.root.type = bfd_link_hash_undefweak;
4707 eh->was_undefined = 1;
4708 htab->twiddled_syms = 1;
4709 }
4710 }
4711
4712 return TRUE;
4713 }
4714
4715 /* Process list of dot-symbols we made in link_hash_newfunc. */
4716
4717 static bfd_boolean
4718 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4719 {
4720 struct ppc_link_hash_table *htab;
4721 struct ppc_link_hash_entry **p, *eh;
4722
4723 if (!is_ppc64_elf (info->output_bfd))
4724 return TRUE;
4725 htab = ppc_hash_table (info);
4726 if (htab == NULL)
4727 return FALSE;
4728
4729 if (is_ppc64_elf (ibfd))
4730 {
4731 p = &htab->dot_syms;
4732 while ((eh = *p) != NULL)
4733 {
4734 *p = NULL;
4735 if (!add_symbol_adjust (eh, info))
4736 return FALSE;
4737 p = &eh->u.next_dot_sym;
4738 }
4739 }
4740
4741 /* Clear the list for non-ppc64 input files. */
4742 p = &htab->dot_syms;
4743 while ((eh = *p) != NULL)
4744 {
4745 *p = NULL;
4746 p = &eh->u.next_dot_sym;
4747 }
4748
4749 /* We need to fix the undefs list for any syms we have twiddled to
4750 undef_weak. */
4751 if (htab->twiddled_syms)
4752 {
4753 bfd_link_repair_undef_list (&htab->elf.root);
4754 htab->twiddled_syms = 0;
4755 }
4756 return TRUE;
4757 }
4758
4759 /* Undo hash table changes when an --as-needed input file is determined
4760 not to be needed. */
4761
4762 static bfd_boolean
4763 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4764 struct bfd_link_info *info)
4765 {
4766 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4767
4768 if (htab == NULL)
4769 return FALSE;
4770
4771 htab->dot_syms = NULL;
4772 return TRUE;
4773 }
4774
4775 /* If --just-symbols against a final linked binary, then assume we need
4776 toc adjusting stubs when calling functions defined there. */
4777
4778 static void
4779 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4780 {
4781 if ((sec->flags & SEC_CODE) != 0
4782 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4783 && is_ppc64_elf (sec->owner))
4784 {
4785 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4786 if (got != NULL
4787 && got->size >= elf_backend_got_header_size
4788 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4789 sec->has_toc_reloc = 1;
4790 }
4791 _bfd_elf_link_just_syms (sec, info);
4792 }
4793
4794 static struct plt_entry **
4795 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4796 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4797 {
4798 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4799 struct plt_entry **local_plt;
4800 unsigned char *local_got_tls_masks;
4801
4802 if (local_got_ents == NULL)
4803 {
4804 bfd_size_type size = symtab_hdr->sh_info;
4805
4806 size *= (sizeof (*local_got_ents)
4807 + sizeof (*local_plt)
4808 + sizeof (*local_got_tls_masks));
4809 local_got_ents = bfd_zalloc (abfd, size);
4810 if (local_got_ents == NULL)
4811 return NULL;
4812 elf_local_got_ents (abfd) = local_got_ents;
4813 }
4814
4815 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4816 {
4817 struct got_entry *ent;
4818
4819 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4820 if (ent->addend == r_addend
4821 && ent->owner == abfd
4822 && ent->tls_type == tls_type)
4823 break;
4824 if (ent == NULL)
4825 {
4826 bfd_size_type amt = sizeof (*ent);
4827 ent = bfd_alloc (abfd, amt);
4828 if (ent == NULL)
4829 return FALSE;
4830 ent->next = local_got_ents[r_symndx];
4831 ent->addend = r_addend;
4832 ent->owner = abfd;
4833 ent->tls_type = tls_type;
4834 ent->is_indirect = FALSE;
4835 ent->got.refcount = 0;
4836 local_got_ents[r_symndx] = ent;
4837 }
4838 ent->got.refcount += 1;
4839 }
4840
4841 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4842 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4843 local_got_tls_masks[r_symndx] |= tls_type;
4844
4845 return local_plt + r_symndx;
4846 }
4847
4848 static bfd_boolean
4849 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4850 {
4851 struct plt_entry *ent;
4852
4853 for (ent = *plist; ent != NULL; ent = ent->next)
4854 if (ent->addend == addend)
4855 break;
4856 if (ent == NULL)
4857 {
4858 bfd_size_type amt = sizeof (*ent);
4859 ent = bfd_alloc (abfd, amt);
4860 if (ent == NULL)
4861 return FALSE;
4862 ent->next = *plist;
4863 ent->addend = addend;
4864 ent->plt.refcount = 0;
4865 *plist = ent;
4866 }
4867 ent->plt.refcount += 1;
4868 return TRUE;
4869 }
4870
4871 static bfd_boolean
4872 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4873 {
4874 return (r_type == R_PPC64_REL24
4875 || r_type == R_PPC64_REL14
4876 || r_type == R_PPC64_REL14_BRTAKEN
4877 || r_type == R_PPC64_REL14_BRNTAKEN
4878 || r_type == R_PPC64_ADDR24
4879 || r_type == R_PPC64_ADDR14
4880 || r_type == R_PPC64_ADDR14_BRTAKEN
4881 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4882 }
4883
4884 /* Look through the relocs for a section during the first phase, and
4885 calculate needed space in the global offset table, procedure
4886 linkage table, and dynamic reloc sections. */
4887
4888 static bfd_boolean
4889 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4890 asection *sec, const Elf_Internal_Rela *relocs)
4891 {
4892 struct ppc_link_hash_table *htab;
4893 Elf_Internal_Shdr *symtab_hdr;
4894 struct elf_link_hash_entry **sym_hashes;
4895 const Elf_Internal_Rela *rel;
4896 const Elf_Internal_Rela *rel_end;
4897 asection *sreloc;
4898 asection **opd_sym_map;
4899 struct elf_link_hash_entry *tga, *dottga;
4900
4901 if (info->relocatable)
4902 return TRUE;
4903
4904 /* Don't do anything special with non-loaded, non-alloced sections.
4905 In particular, any relocs in such sections should not affect GOT
4906 and PLT reference counting (ie. we don't allow them to create GOT
4907 or PLT entries), there's no possibility or desire to optimize TLS
4908 relocs, and there's not much point in propagating relocs to shared
4909 libs that the dynamic linker won't relocate. */
4910 if ((sec->flags & SEC_ALLOC) == 0)
4911 return TRUE;
4912
4913 BFD_ASSERT (is_ppc64_elf (abfd));
4914
4915 htab = ppc_hash_table (info);
4916 if (htab == NULL)
4917 return FALSE;
4918
4919 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4920 FALSE, FALSE, TRUE);
4921 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4922 FALSE, FALSE, TRUE);
4923 symtab_hdr = &elf_symtab_hdr (abfd);
4924 sym_hashes = elf_sym_hashes (abfd);
4925 sreloc = NULL;
4926 opd_sym_map = NULL;
4927 if (strcmp (sec->name, ".opd") == 0)
4928 {
4929 /* Garbage collection needs some extra help with .opd sections.
4930 We don't want to necessarily keep everything referenced by
4931 relocs in .opd, as that would keep all functions. Instead,
4932 if we reference an .opd symbol (a function descriptor), we
4933 want to keep the function code symbol's section. This is
4934 easy for global symbols, but for local syms we need to keep
4935 information about the associated function section. */
4936 bfd_size_type amt;
4937
4938 amt = sec->size * sizeof (*opd_sym_map) / 8;
4939 opd_sym_map = bfd_zalloc (abfd, amt);
4940 if (opd_sym_map == NULL)
4941 return FALSE;
4942 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4943 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4944 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4945 }
4946
4947 if (htab->sfpr == NULL
4948 && !create_linkage_sections (htab->elf.dynobj, info))
4949 return FALSE;
4950
4951 rel_end = relocs + sec->reloc_count;
4952 for (rel = relocs; rel < rel_end; rel++)
4953 {
4954 unsigned long r_symndx;
4955 struct elf_link_hash_entry *h;
4956 enum elf_ppc64_reloc_type r_type;
4957 int tls_type;
4958 struct _ppc64_elf_section_data *ppc64_sec;
4959 struct plt_entry **ifunc;
4960
4961 r_symndx = ELF64_R_SYM (rel->r_info);
4962 if (r_symndx < symtab_hdr->sh_info)
4963 h = NULL;
4964 else
4965 {
4966 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4967 h = elf_follow_link (h);
4968 }
4969
4970 tls_type = 0;
4971 ifunc = NULL;
4972 if (h != NULL)
4973 {
4974 if (h->type == STT_GNU_IFUNC)
4975 {
4976 h->needs_plt = 1;
4977 ifunc = &h->plt.plist;
4978 }
4979 }
4980 else
4981 {
4982 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4983 abfd, r_symndx);
4984 if (isym == NULL)
4985 return FALSE;
4986
4987 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4988 {
4989 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4990 rel->r_addend, PLT_IFUNC);
4991 if (ifunc == NULL)
4992 return FALSE;
4993 }
4994 }
4995 r_type = ELF64_R_TYPE (rel->r_info);
4996 if (is_branch_reloc (r_type))
4997 {
4998 if (h != NULL && (h == tga || h == dottga))
4999 {
5000 if (rel != relocs
5001 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5002 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5003 /* We have a new-style __tls_get_addr call with a marker
5004 reloc. */
5005 ;
5006 else
5007 /* Mark this section as having an old-style call. */
5008 sec->has_tls_get_addr_call = 1;
5009 }
5010
5011 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5012 if (ifunc != NULL
5013 && !update_plt_info (abfd, ifunc, rel->r_addend))
5014 return FALSE;
5015 }
5016
5017 switch (r_type)
5018 {
5019 case R_PPC64_TLSGD:
5020 case R_PPC64_TLSLD:
5021 /* These special tls relocs tie a call to __tls_get_addr with
5022 its parameter symbol. */
5023 break;
5024
5025 case R_PPC64_GOT_TLSLD16:
5026 case R_PPC64_GOT_TLSLD16_LO:
5027 case R_PPC64_GOT_TLSLD16_HI:
5028 case R_PPC64_GOT_TLSLD16_HA:
5029 tls_type = TLS_TLS | TLS_LD;
5030 goto dogottls;
5031
5032 case R_PPC64_GOT_TLSGD16:
5033 case R_PPC64_GOT_TLSGD16_LO:
5034 case R_PPC64_GOT_TLSGD16_HI:
5035 case R_PPC64_GOT_TLSGD16_HA:
5036 tls_type = TLS_TLS | TLS_GD;
5037 goto dogottls;
5038
5039 case R_PPC64_GOT_TPREL16_DS:
5040 case R_PPC64_GOT_TPREL16_LO_DS:
5041 case R_PPC64_GOT_TPREL16_HI:
5042 case R_PPC64_GOT_TPREL16_HA:
5043 if (!info->executable)
5044 info->flags |= DF_STATIC_TLS;
5045 tls_type = TLS_TLS | TLS_TPREL;
5046 goto dogottls;
5047
5048 case R_PPC64_GOT_DTPREL16_DS:
5049 case R_PPC64_GOT_DTPREL16_LO_DS:
5050 case R_PPC64_GOT_DTPREL16_HI:
5051 case R_PPC64_GOT_DTPREL16_HA:
5052 tls_type = TLS_TLS | TLS_DTPREL;
5053 dogottls:
5054 sec->has_tls_reloc = 1;
5055 /* Fall thru */
5056
5057 case R_PPC64_GOT16:
5058 case R_PPC64_GOT16_DS:
5059 case R_PPC64_GOT16_HA:
5060 case R_PPC64_GOT16_HI:
5061 case R_PPC64_GOT16_LO:
5062 case R_PPC64_GOT16_LO_DS:
5063 /* This symbol requires a global offset table entry. */
5064 sec->has_toc_reloc = 1;
5065 if (r_type == R_PPC64_GOT_TLSLD16
5066 || r_type == R_PPC64_GOT_TLSGD16
5067 || r_type == R_PPC64_GOT_TPREL16_DS
5068 || r_type == R_PPC64_GOT_DTPREL16_DS
5069 || r_type == R_PPC64_GOT16
5070 || r_type == R_PPC64_GOT16_DS)
5071 {
5072 htab->do_multi_toc = 1;
5073 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5074 }
5075
5076 if (ppc64_elf_tdata (abfd)->got == NULL
5077 && !create_got_section (abfd, info))
5078 return FALSE;
5079
5080 if (h != NULL)
5081 {
5082 struct ppc_link_hash_entry *eh;
5083 struct got_entry *ent;
5084
5085 eh = (struct ppc_link_hash_entry *) h;
5086 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5087 if (ent->addend == rel->r_addend
5088 && ent->owner == abfd
5089 && ent->tls_type == tls_type)
5090 break;
5091 if (ent == NULL)
5092 {
5093 bfd_size_type amt = sizeof (*ent);
5094 ent = bfd_alloc (abfd, amt);
5095 if (ent == NULL)
5096 return FALSE;
5097 ent->next = eh->elf.got.glist;
5098 ent->addend = rel->r_addend;
5099 ent->owner = abfd;
5100 ent->tls_type = tls_type;
5101 ent->is_indirect = FALSE;
5102 ent->got.refcount = 0;
5103 eh->elf.got.glist = ent;
5104 }
5105 ent->got.refcount += 1;
5106 eh->tls_mask |= tls_type;
5107 }
5108 else
5109 /* This is a global offset table entry for a local symbol. */
5110 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5111 rel->r_addend, tls_type))
5112 return FALSE;
5113 break;
5114
5115 case R_PPC64_PLT16_HA:
5116 case R_PPC64_PLT16_HI:
5117 case R_PPC64_PLT16_LO:
5118 case R_PPC64_PLT32:
5119 case R_PPC64_PLT64:
5120 /* This symbol requires a procedure linkage table entry. We
5121 actually build the entry in adjust_dynamic_symbol,
5122 because this might be a case of linking PIC code without
5123 linking in any dynamic objects, in which case we don't
5124 need to generate a procedure linkage table after all. */
5125 if (h == NULL)
5126 {
5127 /* It does not make sense to have a procedure linkage
5128 table entry for a local symbol. */
5129 bfd_set_error (bfd_error_bad_value);
5130 return FALSE;
5131 }
5132 else
5133 {
5134 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5135 return FALSE;
5136 h->needs_plt = 1;
5137 if (h->root.root.string[0] == '.'
5138 && h->root.root.string[1] != '\0')
5139 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5140 }
5141 break;
5142
5143 /* The following relocations don't need to propagate the
5144 relocation if linking a shared object since they are
5145 section relative. */
5146 case R_PPC64_SECTOFF:
5147 case R_PPC64_SECTOFF_LO:
5148 case R_PPC64_SECTOFF_HI:
5149 case R_PPC64_SECTOFF_HA:
5150 case R_PPC64_SECTOFF_DS:
5151 case R_PPC64_SECTOFF_LO_DS:
5152 case R_PPC64_DTPREL16:
5153 case R_PPC64_DTPREL16_LO:
5154 case R_PPC64_DTPREL16_HI:
5155 case R_PPC64_DTPREL16_HA:
5156 case R_PPC64_DTPREL16_DS:
5157 case R_PPC64_DTPREL16_LO_DS:
5158 case R_PPC64_DTPREL16_HIGHER:
5159 case R_PPC64_DTPREL16_HIGHERA:
5160 case R_PPC64_DTPREL16_HIGHEST:
5161 case R_PPC64_DTPREL16_HIGHESTA:
5162 break;
5163
5164 /* Nor do these. */
5165 case R_PPC64_REL16:
5166 case R_PPC64_REL16_LO:
5167 case R_PPC64_REL16_HI:
5168 case R_PPC64_REL16_HA:
5169 break;
5170
5171 case R_PPC64_TOC16:
5172 case R_PPC64_TOC16_DS:
5173 htab->do_multi_toc = 1;
5174 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5175 case R_PPC64_TOC16_LO:
5176 case R_PPC64_TOC16_HI:
5177 case R_PPC64_TOC16_HA:
5178 case R_PPC64_TOC16_LO_DS:
5179 sec->has_toc_reloc = 1;
5180 break;
5181
5182 /* This relocation describes the C++ object vtable hierarchy.
5183 Reconstruct it for later use during GC. */
5184 case R_PPC64_GNU_VTINHERIT:
5185 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5186 return FALSE;
5187 break;
5188
5189 /* This relocation describes which C++ vtable entries are actually
5190 used. Record for later use during GC. */
5191 case R_PPC64_GNU_VTENTRY:
5192 BFD_ASSERT (h != NULL);
5193 if (h != NULL
5194 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5195 return FALSE;
5196 break;
5197
5198 case R_PPC64_REL14:
5199 case R_PPC64_REL14_BRTAKEN:
5200 case R_PPC64_REL14_BRNTAKEN:
5201 {
5202 asection *dest = NULL;
5203
5204 /* Heuristic: If jumping outside our section, chances are
5205 we are going to need a stub. */
5206 if (h != NULL)
5207 {
5208 /* If the sym is weak it may be overridden later, so
5209 don't assume we know where a weak sym lives. */
5210 if (h->root.type == bfd_link_hash_defined)
5211 dest = h->root.u.def.section;
5212 }
5213 else
5214 {
5215 Elf_Internal_Sym *isym;
5216
5217 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5218 abfd, r_symndx);
5219 if (isym == NULL)
5220 return FALSE;
5221
5222 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5223 }
5224
5225 if (dest != sec)
5226 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5227 }
5228 /* Fall through. */
5229
5230 case R_PPC64_REL24:
5231 if (h != NULL && ifunc == NULL)
5232 {
5233 /* We may need a .plt entry if the function this reloc
5234 refers to is in a shared lib. */
5235 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5236 return FALSE;
5237 h->needs_plt = 1;
5238 if (h->root.root.string[0] == '.'
5239 && h->root.root.string[1] != '\0')
5240 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5241 if (h == tga || h == dottga)
5242 sec->has_tls_reloc = 1;
5243 }
5244 break;
5245
5246 case R_PPC64_TPREL64:
5247 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5248 if (!info->executable)
5249 info->flags |= DF_STATIC_TLS;
5250 goto dotlstoc;
5251
5252 case R_PPC64_DTPMOD64:
5253 if (rel + 1 < rel_end
5254 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5255 && rel[1].r_offset == rel->r_offset + 8)
5256 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5257 else
5258 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5259 goto dotlstoc;
5260
5261 case R_PPC64_DTPREL64:
5262 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5263 if (rel != relocs
5264 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5265 && rel[-1].r_offset == rel->r_offset - 8)
5266 /* This is the second reloc of a dtpmod, dtprel pair.
5267 Don't mark with TLS_DTPREL. */
5268 goto dodyn;
5269
5270 dotlstoc:
5271 sec->has_tls_reloc = 1;
5272 if (h != NULL)
5273 {
5274 struct ppc_link_hash_entry *eh;
5275 eh = (struct ppc_link_hash_entry *) h;
5276 eh->tls_mask |= tls_type;
5277 }
5278 else
5279 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5280 rel->r_addend, tls_type))
5281 return FALSE;
5282
5283 ppc64_sec = ppc64_elf_section_data (sec);
5284 if (ppc64_sec->sec_type != sec_toc)
5285 {
5286 bfd_size_type amt;
5287
5288 /* One extra to simplify get_tls_mask. */
5289 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5290 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5291 if (ppc64_sec->u.toc.symndx == NULL)
5292 return FALSE;
5293 amt = sec->size * sizeof (bfd_vma) / 8;
5294 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5295 if (ppc64_sec->u.toc.add == NULL)
5296 return FALSE;
5297 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5298 ppc64_sec->sec_type = sec_toc;
5299 }
5300 BFD_ASSERT (rel->r_offset % 8 == 0);
5301 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5302 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5303
5304 /* Mark the second slot of a GD or LD entry.
5305 -1 to indicate GD and -2 to indicate LD. */
5306 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5307 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5308 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5309 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5310 goto dodyn;
5311
5312 case R_PPC64_TPREL16:
5313 case R_PPC64_TPREL16_LO:
5314 case R_PPC64_TPREL16_HI:
5315 case R_PPC64_TPREL16_HA:
5316 case R_PPC64_TPREL16_DS:
5317 case R_PPC64_TPREL16_LO_DS:
5318 case R_PPC64_TPREL16_HIGHER:
5319 case R_PPC64_TPREL16_HIGHERA:
5320 case R_PPC64_TPREL16_HIGHEST:
5321 case R_PPC64_TPREL16_HIGHESTA:
5322 if (info->shared)
5323 {
5324 if (!info->executable)
5325 info->flags |= DF_STATIC_TLS;
5326 goto dodyn;
5327 }
5328 break;
5329
5330 case R_PPC64_ADDR64:
5331 if (opd_sym_map != NULL
5332 && rel + 1 < rel_end
5333 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5334 {
5335 if (h != NULL)
5336 {
5337 if (h->root.root.string[0] == '.'
5338 && h->root.root.string[1] != 0
5339 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5340 ;
5341 else
5342 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5343 }
5344 else
5345 {
5346 asection *s;
5347 Elf_Internal_Sym *isym;
5348
5349 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5350 abfd, r_symndx);
5351 if (isym == NULL)
5352 return FALSE;
5353
5354 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5355 if (s != NULL && s != sec)
5356 opd_sym_map[rel->r_offset / 8] = s;
5357 }
5358 }
5359 /* Fall through. */
5360
5361 case R_PPC64_REL30:
5362 case R_PPC64_REL32:
5363 case R_PPC64_REL64:
5364 case R_PPC64_ADDR14:
5365 case R_PPC64_ADDR14_BRNTAKEN:
5366 case R_PPC64_ADDR14_BRTAKEN:
5367 case R_PPC64_ADDR16:
5368 case R_PPC64_ADDR16_DS:
5369 case R_PPC64_ADDR16_HA:
5370 case R_PPC64_ADDR16_HI:
5371 case R_PPC64_ADDR16_HIGHER:
5372 case R_PPC64_ADDR16_HIGHERA:
5373 case R_PPC64_ADDR16_HIGHEST:
5374 case R_PPC64_ADDR16_HIGHESTA:
5375 case R_PPC64_ADDR16_LO:
5376 case R_PPC64_ADDR16_LO_DS:
5377 case R_PPC64_ADDR24:
5378 case R_PPC64_ADDR32:
5379 case R_PPC64_UADDR16:
5380 case R_PPC64_UADDR32:
5381 case R_PPC64_UADDR64:
5382 case R_PPC64_TOC:
5383 if (h != NULL && !info->shared)
5384 /* We may need a copy reloc. */
5385 h->non_got_ref = 1;
5386
5387 /* Don't propagate .opd relocs. */
5388 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5389 break;
5390
5391 /* If we are creating a shared library, and this is a reloc
5392 against a global symbol, or a non PC relative reloc
5393 against a local symbol, then we need to copy the reloc
5394 into the shared library. However, if we are linking with
5395 -Bsymbolic, we do not need to copy a reloc against a
5396 global symbol which is defined in an object we are
5397 including in the link (i.e., DEF_REGULAR is set). At
5398 this point we have not seen all the input files, so it is
5399 possible that DEF_REGULAR is not set now but will be set
5400 later (it is never cleared). In case of a weak definition,
5401 DEF_REGULAR may be cleared later by a strong definition in
5402 a shared library. We account for that possibility below by
5403 storing information in the dyn_relocs field of the hash
5404 table entry. A similar situation occurs when creating
5405 shared libraries and symbol visibility changes render the
5406 symbol local.
5407
5408 If on the other hand, we are creating an executable, we
5409 may need to keep relocations for symbols satisfied by a
5410 dynamic library if we manage to avoid copy relocs for the
5411 symbol. */
5412 dodyn:
5413 if ((info->shared
5414 && (must_be_dyn_reloc (info, r_type)
5415 || (h != NULL
5416 && (! info->symbolic
5417 || h->root.type == bfd_link_hash_defweak
5418 || !h->def_regular))))
5419 || (ELIMINATE_COPY_RELOCS
5420 && !info->shared
5421 && h != NULL
5422 && (h->root.type == bfd_link_hash_defweak
5423 || !h->def_regular))
5424 || (!info->shared
5425 && ifunc != NULL))
5426 {
5427 struct elf_dyn_relocs *p;
5428 struct elf_dyn_relocs **head;
5429
5430 /* We must copy these reloc types into the output file.
5431 Create a reloc section in dynobj and make room for
5432 this reloc. */
5433 if (sreloc == NULL)
5434 {
5435 sreloc = _bfd_elf_make_dynamic_reloc_section
5436 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5437
5438 if (sreloc == NULL)
5439 return FALSE;
5440 }
5441
5442 /* If this is a global symbol, we count the number of
5443 relocations we need for this symbol. */
5444 if (h != NULL)
5445 {
5446 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5447 }
5448 else
5449 {
5450 /* Track dynamic relocs needed for local syms too.
5451 We really need local syms available to do this
5452 easily. Oh well. */
5453 asection *s;
5454 void *vpp;
5455 Elf_Internal_Sym *isym;
5456
5457 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5458 abfd, r_symndx);
5459 if (isym == NULL)
5460 return FALSE;
5461
5462 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5463 if (s == NULL)
5464 s = sec;
5465
5466 vpp = &elf_section_data (s)->local_dynrel;
5467 head = (struct elf_dyn_relocs **) vpp;
5468 }
5469
5470 p = *head;
5471 if (p == NULL || p->sec != sec)
5472 {
5473 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5474 if (p == NULL)
5475 return FALSE;
5476 p->next = *head;
5477 *head = p;
5478 p->sec = sec;
5479 p->count = 0;
5480 p->pc_count = 0;
5481 }
5482
5483 p->count += 1;
5484 if (!must_be_dyn_reloc (info, r_type))
5485 p->pc_count += 1;
5486 }
5487 break;
5488
5489 default:
5490 break;
5491 }
5492 }
5493
5494 return TRUE;
5495 }
5496
5497 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5498 of the code entry point, and its section. */
5499
5500 static bfd_vma
5501 opd_entry_value (asection *opd_sec,
5502 bfd_vma offset,
5503 asection **code_sec,
5504 bfd_vma *code_off)
5505 {
5506 bfd *opd_bfd = opd_sec->owner;
5507 Elf_Internal_Rela *relocs;
5508 Elf_Internal_Rela *lo, *hi, *look;
5509 bfd_vma val;
5510
5511 /* No relocs implies we are linking a --just-symbols object. */
5512 if (opd_sec->reloc_count == 0)
5513 {
5514 char buf[8];
5515
5516 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5517 return (bfd_vma) -1;
5518
5519 val = bfd_get_64 (opd_bfd, buf);
5520 if (code_sec != NULL)
5521 {
5522 asection *sec, *likely = NULL;
5523 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5524 if (sec->vma <= val
5525 && (sec->flags & SEC_LOAD) != 0
5526 && (sec->flags & SEC_ALLOC) != 0)
5527 likely = sec;
5528 if (likely != NULL)
5529 {
5530 *code_sec = likely;
5531 if (code_off != NULL)
5532 *code_off = val - likely->vma;
5533 }
5534 }
5535 return val;
5536 }
5537
5538 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5539
5540 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5541 if (relocs == NULL)
5542 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5543
5544 /* Go find the opd reloc at the sym address. */
5545 lo = relocs;
5546 BFD_ASSERT (lo != NULL);
5547 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5548 val = (bfd_vma) -1;
5549 while (lo < hi)
5550 {
5551 look = lo + (hi - lo) / 2;
5552 if (look->r_offset < offset)
5553 lo = look + 1;
5554 else if (look->r_offset > offset)
5555 hi = look;
5556 else
5557 {
5558 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5559
5560 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5561 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5562 {
5563 unsigned long symndx = ELF64_R_SYM (look->r_info);
5564 asection *sec;
5565
5566 if (symndx < symtab_hdr->sh_info)
5567 {
5568 Elf_Internal_Sym *sym;
5569
5570 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5571 if (sym == NULL)
5572 {
5573 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5574 symtab_hdr->sh_info,
5575 0, NULL, NULL, NULL);
5576 if (sym == NULL)
5577 break;
5578 symtab_hdr->contents = (bfd_byte *) sym;
5579 }
5580
5581 sym += symndx;
5582 val = sym->st_value;
5583 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5584 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5585 }
5586 else
5587 {
5588 struct elf_link_hash_entry **sym_hashes;
5589 struct elf_link_hash_entry *rh;
5590
5591 sym_hashes = elf_sym_hashes (opd_bfd);
5592 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5593 rh = elf_follow_link (rh);
5594 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5595 || rh->root.type == bfd_link_hash_defweak);
5596 val = rh->root.u.def.value;
5597 sec = rh->root.u.def.section;
5598 }
5599 val += look->r_addend;
5600 if (code_off != NULL)
5601 *code_off = val;
5602 if (code_sec != NULL)
5603 *code_sec = sec;
5604 if (sec != NULL && sec->output_section != NULL)
5605 val += sec->output_section->vma + sec->output_offset;
5606 }
5607 break;
5608 }
5609 }
5610
5611 return val;
5612 }
5613
5614 /* Return true if symbol is defined in a regular object file. */
5615
5616 static bfd_boolean
5617 is_static_defined (struct elf_link_hash_entry *h)
5618 {
5619 return ((h->root.type == bfd_link_hash_defined
5620 || h->root.type == bfd_link_hash_defweak)
5621 && h->root.u.def.section != NULL
5622 && h->root.u.def.section->output_section != NULL);
5623 }
5624
5625 /* If FDH is a function descriptor symbol, return the associated code
5626 entry symbol if it is defined. Return NULL otherwise. */
5627
5628 static struct ppc_link_hash_entry *
5629 defined_code_entry (struct ppc_link_hash_entry *fdh)
5630 {
5631 if (fdh->is_func_descriptor)
5632 {
5633 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5634 if (fh->elf.root.type == bfd_link_hash_defined
5635 || fh->elf.root.type == bfd_link_hash_defweak)
5636 return fh;
5637 }
5638 return NULL;
5639 }
5640
5641 /* If FH is a function code entry symbol, return the associated
5642 function descriptor symbol if it is defined. Return NULL otherwise. */
5643
5644 static struct ppc_link_hash_entry *
5645 defined_func_desc (struct ppc_link_hash_entry *fh)
5646 {
5647 if (fh->oh != NULL
5648 && fh->oh->is_func_descriptor)
5649 {
5650 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5651 if (fdh->elf.root.type == bfd_link_hash_defined
5652 || fdh->elf.root.type == bfd_link_hash_defweak)
5653 return fdh;
5654 }
5655 return NULL;
5656 }
5657
5658 /* Mark all our entry sym sections, both opd and code section. */
5659
5660 static void
5661 ppc64_elf_gc_keep (struct bfd_link_info *info)
5662 {
5663 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5664 struct bfd_sym_chain *sym;
5665
5666 if (htab == NULL)
5667 return;
5668
5669 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5670 {
5671 struct ppc_link_hash_entry *eh, *fh;
5672 asection *sec;
5673
5674 eh = (struct ppc_link_hash_entry *)
5675 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5676 if (eh == NULL)
5677 continue;
5678 if (eh->elf.root.type != bfd_link_hash_defined
5679 && eh->elf.root.type != bfd_link_hash_defweak)
5680 continue;
5681
5682 fh = defined_code_entry (eh);
5683 if (fh != NULL)
5684 {
5685 sec = fh->elf.root.u.def.section;
5686 sec->flags |= SEC_KEEP;
5687 }
5688 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5689 && opd_entry_value (eh->elf.root.u.def.section,
5690 eh->elf.root.u.def.value,
5691 &sec, NULL) != (bfd_vma) -1)
5692 sec->flags |= SEC_KEEP;
5693
5694 sec = eh->elf.root.u.def.section;
5695 sec->flags |= SEC_KEEP;
5696 }
5697 }
5698
5699 /* Mark sections containing dynamically referenced symbols. When
5700 building shared libraries, we must assume that any visible symbol is
5701 referenced. */
5702
5703 static bfd_boolean
5704 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5705 {
5706 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5707 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5708 struct ppc_link_hash_entry *fdh;
5709
5710 /* Dynamic linking info is on the func descriptor sym. */
5711 fdh = defined_func_desc (eh);
5712 if (fdh != NULL)
5713 eh = fdh;
5714
5715 if ((eh->elf.root.type == bfd_link_hash_defined
5716 || eh->elf.root.type == bfd_link_hash_defweak)
5717 && (eh->elf.ref_dynamic
5718 || (!info->executable
5719 && eh->elf.def_regular
5720 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5721 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5722 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5723 || !bfd_hide_sym_by_version (info->version_info,
5724 eh->elf.root.root.string)))))
5725 {
5726 asection *code_sec;
5727 struct ppc_link_hash_entry *fh;
5728
5729 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5730
5731 /* Function descriptor syms cause the associated
5732 function code sym section to be marked. */
5733 fh = defined_code_entry (eh);
5734 if (fh != NULL)
5735 {
5736 code_sec = fh->elf.root.u.def.section;
5737 code_sec->flags |= SEC_KEEP;
5738 }
5739 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5740 && opd_entry_value (eh->elf.root.u.def.section,
5741 eh->elf.root.u.def.value,
5742 &code_sec, NULL) != (bfd_vma) -1)
5743 code_sec->flags |= SEC_KEEP;
5744 }
5745
5746 return TRUE;
5747 }
5748
5749 /* Return the section that should be marked against GC for a given
5750 relocation. */
5751
5752 static asection *
5753 ppc64_elf_gc_mark_hook (asection *sec,
5754 struct bfd_link_info *info,
5755 Elf_Internal_Rela *rel,
5756 struct elf_link_hash_entry *h,
5757 Elf_Internal_Sym *sym)
5758 {
5759 asection *rsec;
5760
5761 /* Syms return NULL if we're marking .opd, so we avoid marking all
5762 function sections, as all functions are referenced in .opd. */
5763 rsec = NULL;
5764 if (get_opd_info (sec) != NULL)
5765 return rsec;
5766
5767 if (h != NULL)
5768 {
5769 enum elf_ppc64_reloc_type r_type;
5770 struct ppc_link_hash_entry *eh, *fh, *fdh;
5771
5772 r_type = ELF64_R_TYPE (rel->r_info);
5773 switch (r_type)
5774 {
5775 case R_PPC64_GNU_VTINHERIT:
5776 case R_PPC64_GNU_VTENTRY:
5777 break;
5778
5779 default:
5780 switch (h->root.type)
5781 {
5782 case bfd_link_hash_defined:
5783 case bfd_link_hash_defweak:
5784 eh = (struct ppc_link_hash_entry *) h;
5785 fdh = defined_func_desc (eh);
5786 if (fdh != NULL)
5787 eh = fdh;
5788
5789 /* Function descriptor syms cause the associated
5790 function code sym section to be marked. */
5791 fh = defined_code_entry (eh);
5792 if (fh != NULL)
5793 {
5794 /* They also mark their opd section. */
5795 eh->elf.root.u.def.section->gc_mark = 1;
5796
5797 rsec = fh->elf.root.u.def.section;
5798 }
5799 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5800 && opd_entry_value (eh->elf.root.u.def.section,
5801 eh->elf.root.u.def.value,
5802 &rsec, NULL) != (bfd_vma) -1)
5803 eh->elf.root.u.def.section->gc_mark = 1;
5804 else
5805 rsec = h->root.u.def.section;
5806 break;
5807
5808 case bfd_link_hash_common:
5809 rsec = h->root.u.c.p->section;
5810 break;
5811
5812 default:
5813 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5814 }
5815 }
5816 }
5817 else
5818 {
5819 struct _opd_sec_data *opd;
5820
5821 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5822 opd = get_opd_info (rsec);
5823 if (opd != NULL && opd->func_sec != NULL)
5824 {
5825 rsec->gc_mark = 1;
5826
5827 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5828 }
5829 }
5830
5831 return rsec;
5832 }
5833
5834 /* Update the .got, .plt. and dynamic reloc reference counts for the
5835 section being removed. */
5836
5837 static bfd_boolean
5838 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5839 asection *sec, const Elf_Internal_Rela *relocs)
5840 {
5841 struct ppc_link_hash_table *htab;
5842 Elf_Internal_Shdr *symtab_hdr;
5843 struct elf_link_hash_entry **sym_hashes;
5844 struct got_entry **local_got_ents;
5845 const Elf_Internal_Rela *rel, *relend;
5846
5847 if (info->relocatable)
5848 return TRUE;
5849
5850 if ((sec->flags & SEC_ALLOC) == 0)
5851 return TRUE;
5852
5853 elf_section_data (sec)->local_dynrel = NULL;
5854
5855 htab = ppc_hash_table (info);
5856 if (htab == NULL)
5857 return FALSE;
5858
5859 symtab_hdr = &elf_symtab_hdr (abfd);
5860 sym_hashes = elf_sym_hashes (abfd);
5861 local_got_ents = elf_local_got_ents (abfd);
5862
5863 relend = relocs + sec->reloc_count;
5864 for (rel = relocs; rel < relend; rel++)
5865 {
5866 unsigned long r_symndx;
5867 enum elf_ppc64_reloc_type r_type;
5868 struct elf_link_hash_entry *h = NULL;
5869 unsigned char tls_type = 0;
5870
5871 r_symndx = ELF64_R_SYM (rel->r_info);
5872 r_type = ELF64_R_TYPE (rel->r_info);
5873 if (r_symndx >= symtab_hdr->sh_info)
5874 {
5875 struct ppc_link_hash_entry *eh;
5876 struct elf_dyn_relocs **pp;
5877 struct elf_dyn_relocs *p;
5878
5879 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5880 h = elf_follow_link (h);
5881 eh = (struct ppc_link_hash_entry *) h;
5882
5883 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5884 if (p->sec == sec)
5885 {
5886 /* Everything must go for SEC. */
5887 *pp = p->next;
5888 break;
5889 }
5890 }
5891
5892 if (is_branch_reloc (r_type))
5893 {
5894 struct plt_entry **ifunc = NULL;
5895 if (h != NULL)
5896 {
5897 if (h->type == STT_GNU_IFUNC)
5898 ifunc = &h->plt.plist;
5899 }
5900 else if (local_got_ents != NULL)
5901 {
5902 struct plt_entry **local_plt = (struct plt_entry **)
5903 (local_got_ents + symtab_hdr->sh_info);
5904 unsigned char *local_got_tls_masks = (unsigned char *)
5905 (local_plt + symtab_hdr->sh_info);
5906 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5907 ifunc = local_plt + r_symndx;
5908 }
5909 if (ifunc != NULL)
5910 {
5911 struct plt_entry *ent;
5912
5913 for (ent = *ifunc; ent != NULL; ent = ent->next)
5914 if (ent->addend == rel->r_addend)
5915 break;
5916 if (ent == NULL)
5917 abort ();
5918 if (ent->plt.refcount > 0)
5919 ent->plt.refcount -= 1;
5920 continue;
5921 }
5922 }
5923
5924 switch (r_type)
5925 {
5926 case R_PPC64_GOT_TLSLD16:
5927 case R_PPC64_GOT_TLSLD16_LO:
5928 case R_PPC64_GOT_TLSLD16_HI:
5929 case R_PPC64_GOT_TLSLD16_HA:
5930 tls_type = TLS_TLS | TLS_LD;
5931 goto dogot;
5932
5933 case R_PPC64_GOT_TLSGD16:
5934 case R_PPC64_GOT_TLSGD16_LO:
5935 case R_PPC64_GOT_TLSGD16_HI:
5936 case R_PPC64_GOT_TLSGD16_HA:
5937 tls_type = TLS_TLS | TLS_GD;
5938 goto dogot;
5939
5940 case R_PPC64_GOT_TPREL16_DS:
5941 case R_PPC64_GOT_TPREL16_LO_DS:
5942 case R_PPC64_GOT_TPREL16_HI:
5943 case R_PPC64_GOT_TPREL16_HA:
5944 tls_type = TLS_TLS | TLS_TPREL;
5945 goto dogot;
5946
5947 case R_PPC64_GOT_DTPREL16_DS:
5948 case R_PPC64_GOT_DTPREL16_LO_DS:
5949 case R_PPC64_GOT_DTPREL16_HI:
5950 case R_PPC64_GOT_DTPREL16_HA:
5951 tls_type = TLS_TLS | TLS_DTPREL;
5952 goto dogot;
5953
5954 case R_PPC64_GOT16:
5955 case R_PPC64_GOT16_DS:
5956 case R_PPC64_GOT16_HA:
5957 case R_PPC64_GOT16_HI:
5958 case R_PPC64_GOT16_LO:
5959 case R_PPC64_GOT16_LO_DS:
5960 dogot:
5961 {
5962 struct got_entry *ent;
5963
5964 if (h != NULL)
5965 ent = h->got.glist;
5966 else
5967 ent = local_got_ents[r_symndx];
5968
5969 for (; ent != NULL; ent = ent->next)
5970 if (ent->addend == rel->r_addend
5971 && ent->owner == abfd
5972 && ent->tls_type == tls_type)
5973 break;
5974 if (ent == NULL)
5975 abort ();
5976 if (ent->got.refcount > 0)
5977 ent->got.refcount -= 1;
5978 }
5979 break;
5980
5981 case R_PPC64_PLT16_HA:
5982 case R_PPC64_PLT16_HI:
5983 case R_PPC64_PLT16_LO:
5984 case R_PPC64_PLT32:
5985 case R_PPC64_PLT64:
5986 case R_PPC64_REL14:
5987 case R_PPC64_REL14_BRNTAKEN:
5988 case R_PPC64_REL14_BRTAKEN:
5989 case R_PPC64_REL24:
5990 if (h != NULL)
5991 {
5992 struct plt_entry *ent;
5993
5994 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5995 if (ent->addend == rel->r_addend)
5996 break;
5997 if (ent != NULL && ent->plt.refcount > 0)
5998 ent->plt.refcount -= 1;
5999 }
6000 break;
6001
6002 default:
6003 break;
6004 }
6005 }
6006 return TRUE;
6007 }
6008
6009 /* The maximum size of .sfpr. */
6010 #define SFPR_MAX (218*4)
6011
6012 struct sfpr_def_parms
6013 {
6014 const char name[12];
6015 unsigned char lo, hi;
6016 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6017 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6018 };
6019
6020 /* Auto-generate _save*, _rest* functions in .sfpr. */
6021
6022 static bfd_boolean
6023 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6024 {
6025 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6026 unsigned int i;
6027 size_t len = strlen (parm->name);
6028 bfd_boolean writing = FALSE;
6029 char sym[16];
6030
6031 if (htab == NULL)
6032 return FALSE;
6033
6034 memcpy (sym, parm->name, len);
6035 sym[len + 2] = 0;
6036
6037 for (i = parm->lo; i <= parm->hi; i++)
6038 {
6039 struct elf_link_hash_entry *h;
6040
6041 sym[len + 0] = i / 10 + '0';
6042 sym[len + 1] = i % 10 + '0';
6043 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6044 if (h != NULL
6045 && !h->def_regular)
6046 {
6047 h->root.type = bfd_link_hash_defined;
6048 h->root.u.def.section = htab->sfpr;
6049 h->root.u.def.value = htab->sfpr->size;
6050 h->type = STT_FUNC;
6051 h->def_regular = 1;
6052 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6053 writing = TRUE;
6054 if (htab->sfpr->contents == NULL)
6055 {
6056 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6057 if (htab->sfpr->contents == NULL)
6058 return FALSE;
6059 }
6060 }
6061 if (writing)
6062 {
6063 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6064 if (i != parm->hi)
6065 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6066 else
6067 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6068 htab->sfpr->size = p - htab->sfpr->contents;
6069 }
6070 }
6071
6072 return TRUE;
6073 }
6074
6075 static bfd_byte *
6076 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6077 {
6078 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6079 return p + 4;
6080 }
6081
6082 static bfd_byte *
6083 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6084 {
6085 p = savegpr0 (abfd, p, r);
6086 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6087 p = p + 4;
6088 bfd_put_32 (abfd, BLR, p);
6089 return p + 4;
6090 }
6091
6092 static bfd_byte *
6093 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6094 {
6095 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6096 return p + 4;
6097 }
6098
6099 static bfd_byte *
6100 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6101 {
6102 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6103 p = p + 4;
6104 p = restgpr0 (abfd, p, r);
6105 bfd_put_32 (abfd, MTLR_R0, p);
6106 p = p + 4;
6107 if (r == 29)
6108 {
6109 p = restgpr0 (abfd, p, 30);
6110 p = restgpr0 (abfd, p, 31);
6111 }
6112 bfd_put_32 (abfd, BLR, p);
6113 return p + 4;
6114 }
6115
6116 static bfd_byte *
6117 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6118 {
6119 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6120 return p + 4;
6121 }
6122
6123 static bfd_byte *
6124 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6125 {
6126 p = savegpr1 (abfd, p, r);
6127 bfd_put_32 (abfd, BLR, p);
6128 return p + 4;
6129 }
6130
6131 static bfd_byte *
6132 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6133 {
6134 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6135 return p + 4;
6136 }
6137
6138 static bfd_byte *
6139 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6140 {
6141 p = restgpr1 (abfd, p, r);
6142 bfd_put_32 (abfd, BLR, p);
6143 return p + 4;
6144 }
6145
6146 static bfd_byte *
6147 savefpr (bfd *abfd, bfd_byte *p, int r)
6148 {
6149 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6150 return p + 4;
6151 }
6152
6153 static bfd_byte *
6154 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6155 {
6156 p = savefpr (abfd, p, r);
6157 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6158 p = p + 4;
6159 bfd_put_32 (abfd, BLR, p);
6160 return p + 4;
6161 }
6162
6163 static bfd_byte *
6164 restfpr (bfd *abfd, bfd_byte *p, int r)
6165 {
6166 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6167 return p + 4;
6168 }
6169
6170 static bfd_byte *
6171 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6172 {
6173 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6174 p = p + 4;
6175 p = restfpr (abfd, p, r);
6176 bfd_put_32 (abfd, MTLR_R0, p);
6177 p = p + 4;
6178 if (r == 29)
6179 {
6180 p = restfpr (abfd, p, 30);
6181 p = restfpr (abfd, p, 31);
6182 }
6183 bfd_put_32 (abfd, BLR, p);
6184 return p + 4;
6185 }
6186
6187 static bfd_byte *
6188 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6189 {
6190 p = savefpr (abfd, p, r);
6191 bfd_put_32 (abfd, BLR, p);
6192 return p + 4;
6193 }
6194
6195 static bfd_byte *
6196 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6197 {
6198 p = restfpr (abfd, p, r);
6199 bfd_put_32 (abfd, BLR, p);
6200 return p + 4;
6201 }
6202
6203 static bfd_byte *
6204 savevr (bfd *abfd, bfd_byte *p, int r)
6205 {
6206 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6207 p = p + 4;
6208 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6209 return p + 4;
6210 }
6211
6212 static bfd_byte *
6213 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6214 {
6215 p = savevr (abfd, p, r);
6216 bfd_put_32 (abfd, BLR, p);
6217 return p + 4;
6218 }
6219
6220 static bfd_byte *
6221 restvr (bfd *abfd, bfd_byte *p, int r)
6222 {
6223 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6224 p = p + 4;
6225 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6226 return p + 4;
6227 }
6228
6229 static bfd_byte *
6230 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6231 {
6232 p = restvr (abfd, p, r);
6233 bfd_put_32 (abfd, BLR, p);
6234 return p + 4;
6235 }
6236
6237 /* Called via elf_link_hash_traverse to transfer dynamic linking
6238 information on function code symbol entries to their corresponding
6239 function descriptor symbol entries. */
6240
6241 static bfd_boolean
6242 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6243 {
6244 struct bfd_link_info *info;
6245 struct ppc_link_hash_table *htab;
6246 struct plt_entry *ent;
6247 struct ppc_link_hash_entry *fh;
6248 struct ppc_link_hash_entry *fdh;
6249 bfd_boolean force_local;
6250
6251 fh = (struct ppc_link_hash_entry *) h;
6252 if (fh->elf.root.type == bfd_link_hash_indirect)
6253 return TRUE;
6254
6255 info = inf;
6256 htab = ppc_hash_table (info);
6257 if (htab == NULL)
6258 return FALSE;
6259
6260 /* Resolve undefined references to dot-symbols as the value
6261 in the function descriptor, if we have one in a regular object.
6262 This is to satisfy cases like ".quad .foo". Calls to functions
6263 in dynamic objects are handled elsewhere. */
6264 if (fh->elf.root.type == bfd_link_hash_undefweak
6265 && fh->was_undefined
6266 && (fdh = defined_func_desc (fh)) != NULL
6267 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6268 && opd_entry_value (fdh->elf.root.u.def.section,
6269 fdh->elf.root.u.def.value,
6270 &fh->elf.root.u.def.section,
6271 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6272 {
6273 fh->elf.root.type = fdh->elf.root.type;
6274 fh->elf.forced_local = 1;
6275 fh->elf.def_regular = fdh->elf.def_regular;
6276 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6277 }
6278
6279 /* If this is a function code symbol, transfer dynamic linking
6280 information to the function descriptor symbol. */
6281 if (!fh->is_func)
6282 return TRUE;
6283
6284 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6285 if (ent->plt.refcount > 0)
6286 break;
6287 if (ent == NULL
6288 || fh->elf.root.root.string[0] != '.'
6289 || fh->elf.root.root.string[1] == '\0')
6290 return TRUE;
6291
6292 /* Find the corresponding function descriptor symbol. Create it
6293 as undefined if necessary. */
6294
6295 fdh = lookup_fdh (fh, htab);
6296 if (fdh == NULL
6297 && !info->executable
6298 && (fh->elf.root.type == bfd_link_hash_undefined
6299 || fh->elf.root.type == bfd_link_hash_undefweak))
6300 {
6301 fdh = make_fdh (info, fh);
6302 if (fdh == NULL)
6303 return FALSE;
6304 }
6305
6306 /* Fake function descriptors are made undefweak. If the function
6307 code symbol is strong undefined, make the fake sym the same.
6308 If the function code symbol is defined, then force the fake
6309 descriptor local; We can't support overriding of symbols in a
6310 shared library on a fake descriptor. */
6311
6312 if (fdh != NULL
6313 && fdh->fake
6314 && fdh->elf.root.type == bfd_link_hash_undefweak)
6315 {
6316 if (fh->elf.root.type == bfd_link_hash_undefined)
6317 {
6318 fdh->elf.root.type = bfd_link_hash_undefined;
6319 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6320 }
6321 else if (fh->elf.root.type == bfd_link_hash_defined
6322 || fh->elf.root.type == bfd_link_hash_defweak)
6323 {
6324 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6325 }
6326 }
6327
6328 if (fdh != NULL
6329 && !fdh->elf.forced_local
6330 && (!info->executable
6331 || fdh->elf.def_dynamic
6332 || fdh->elf.ref_dynamic
6333 || (fdh->elf.root.type == bfd_link_hash_undefweak
6334 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6335 {
6336 if (fdh->elf.dynindx == -1)
6337 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6338 return FALSE;
6339 fdh->elf.ref_regular |= fh->elf.ref_regular;
6340 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6341 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6342 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6343 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6344 {
6345 move_plt_plist (fh, fdh);
6346 fdh->elf.needs_plt = 1;
6347 }
6348 fdh->is_func_descriptor = 1;
6349 fdh->oh = fh;
6350 fh->oh = fdh;
6351 }
6352
6353 /* Now that the info is on the function descriptor, clear the
6354 function code sym info. Any function code syms for which we
6355 don't have a definition in a regular file, we force local.
6356 This prevents a shared library from exporting syms that have
6357 been imported from another library. Function code syms that
6358 are really in the library we must leave global to prevent the
6359 linker dragging in a definition from a static library. */
6360 force_local = (!fh->elf.def_regular
6361 || fdh == NULL
6362 || !fdh->elf.def_regular
6363 || fdh->elf.forced_local);
6364 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6365
6366 return TRUE;
6367 }
6368
6369 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6370 this hook to a) provide some gcc support functions, and b) transfer
6371 dynamic linking information gathered so far on function code symbol
6372 entries, to their corresponding function descriptor symbol entries. */
6373
6374 static bfd_boolean
6375 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6376 struct bfd_link_info *info)
6377 {
6378 struct ppc_link_hash_table *htab;
6379 unsigned int i;
6380 const struct sfpr_def_parms funcs[] =
6381 {
6382 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6383 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6384 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6385 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6386 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6387 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6388 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6389 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6390 { "._savef", 14, 31, savefpr, savefpr1_tail },
6391 { "._restf", 14, 31, restfpr, restfpr1_tail },
6392 { "_savevr_", 20, 31, savevr, savevr_tail },
6393 { "_restvr_", 20, 31, restvr, restvr_tail }
6394 };
6395
6396 htab = ppc_hash_table (info);
6397 if (htab == NULL)
6398 return FALSE;
6399
6400 if (htab->sfpr == NULL)
6401 /* We don't have any relocs. */
6402 return TRUE;
6403
6404 /* Provide any missing _save* and _rest* functions. */
6405 htab->sfpr->size = 0;
6406 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6407 if (!sfpr_define (info, &funcs[i]))
6408 return FALSE;
6409
6410 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6411
6412 if (htab->sfpr->size == 0)
6413 htab->sfpr->flags |= SEC_EXCLUDE;
6414
6415 return TRUE;
6416 }
6417
6418 /* Adjust a symbol defined by a dynamic object and referenced by a
6419 regular object. The current definition is in some section of the
6420 dynamic object, but we're not including those sections. We have to
6421 change the definition to something the rest of the link can
6422 understand. */
6423
6424 static bfd_boolean
6425 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6426 struct elf_link_hash_entry *h)
6427 {
6428 struct ppc_link_hash_table *htab;
6429 asection *s;
6430
6431 htab = ppc_hash_table (info);
6432 if (htab == NULL)
6433 return FALSE;
6434
6435 /* Deal with function syms. */
6436 if (h->type == STT_FUNC
6437 || h->type == STT_GNU_IFUNC
6438 || h->needs_plt)
6439 {
6440 /* Clear procedure linkage table information for any symbol that
6441 won't need a .plt entry. */
6442 struct plt_entry *ent;
6443 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6444 if (ent->plt.refcount > 0)
6445 break;
6446 if (ent == NULL
6447 || (h->type != STT_GNU_IFUNC
6448 && (SYMBOL_CALLS_LOCAL (info, h)
6449 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6450 && h->root.type == bfd_link_hash_undefweak))))
6451 {
6452 h->plt.plist = NULL;
6453 h->needs_plt = 0;
6454 }
6455 }
6456 else
6457 h->plt.plist = NULL;
6458
6459 /* If this is a weak symbol, and there is a real definition, the
6460 processor independent code will have arranged for us to see the
6461 real definition first, and we can just use the same value. */
6462 if (h->u.weakdef != NULL)
6463 {
6464 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6465 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6466 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6467 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6468 if (ELIMINATE_COPY_RELOCS)
6469 h->non_got_ref = h->u.weakdef->non_got_ref;
6470 return TRUE;
6471 }
6472
6473 /* If we are creating a shared library, we must presume that the
6474 only references to the symbol are via the global offset table.
6475 For such cases we need not do anything here; the relocations will
6476 be handled correctly by relocate_section. */
6477 if (info->shared)
6478 return TRUE;
6479
6480 /* If there are no references to this symbol that do not use the
6481 GOT, we don't need to generate a copy reloc. */
6482 if (!h->non_got_ref)
6483 return TRUE;
6484
6485 /* Don't generate a copy reloc for symbols defined in the executable. */
6486 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6487 return TRUE;
6488
6489 if (ELIMINATE_COPY_RELOCS)
6490 {
6491 struct ppc_link_hash_entry * eh;
6492 struct elf_dyn_relocs *p;
6493
6494 eh = (struct ppc_link_hash_entry *) h;
6495 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6496 {
6497 s = p->sec->output_section;
6498 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6499 break;
6500 }
6501
6502 /* If we didn't find any dynamic relocs in read-only sections, then
6503 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6504 if (p == NULL)
6505 {
6506 h->non_got_ref = 0;
6507 return TRUE;
6508 }
6509 }
6510
6511 if (h->plt.plist != NULL)
6512 {
6513 /* We should never get here, but unfortunately there are versions
6514 of gcc out there that improperly (for this ABI) put initialized
6515 function pointers, vtable refs and suchlike in read-only
6516 sections. Allow them to proceed, but warn that this might
6517 break at runtime. */
6518 info->callbacks->einfo
6519 (_("%P: copy reloc against `%s' requires lazy plt linking; "
6520 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6521 h->root.root.string);
6522 }
6523
6524 /* This is a reference to a symbol defined by a dynamic object which
6525 is not a function. */
6526
6527 if (h->size == 0)
6528 {
6529 info->callbacks->einfo (_("%P: dynamic variable `%s' is zero size\n"),
6530 h->root.root.string);
6531 return TRUE;
6532 }
6533
6534 /* We must allocate the symbol in our .dynbss section, which will
6535 become part of the .bss section of the executable. There will be
6536 an entry for this symbol in the .dynsym section. The dynamic
6537 object will contain position independent code, so all references
6538 from the dynamic object to this symbol will go through the global
6539 offset table. The dynamic linker will use the .dynsym entry to
6540 determine the address it must put in the global offset table, so
6541 both the dynamic object and the regular object will refer to the
6542 same memory location for the variable. */
6543
6544 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6545 to copy the initial value out of the dynamic object and into the
6546 runtime process image. We need to remember the offset into the
6547 .rela.bss section we are going to use. */
6548 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6549 {
6550 htab->relbss->size += sizeof (Elf64_External_Rela);
6551 h->needs_copy = 1;
6552 }
6553
6554 s = htab->dynbss;
6555
6556 return _bfd_elf_adjust_dynamic_copy (h, s);
6557 }
6558
6559 /* If given a function descriptor symbol, hide both the function code
6560 sym and the descriptor. */
6561 static void
6562 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6563 struct elf_link_hash_entry *h,
6564 bfd_boolean force_local)
6565 {
6566 struct ppc_link_hash_entry *eh;
6567 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6568
6569 eh = (struct ppc_link_hash_entry *) h;
6570 if (eh->is_func_descriptor)
6571 {
6572 struct ppc_link_hash_entry *fh = eh->oh;
6573
6574 if (fh == NULL)
6575 {
6576 const char *p, *q;
6577 struct ppc_link_hash_table *htab;
6578 char save;
6579
6580 /* We aren't supposed to use alloca in BFD because on
6581 systems which do not have alloca the version in libiberty
6582 calls xmalloc, which might cause the program to crash
6583 when it runs out of memory. This function doesn't have a
6584 return status, so there's no way to gracefully return an
6585 error. So cheat. We know that string[-1] can be safely
6586 accessed; It's either a string in an ELF string table,
6587 or allocated in an objalloc structure. */
6588
6589 p = eh->elf.root.root.string - 1;
6590 save = *p;
6591 *(char *) p = '.';
6592 htab = ppc_hash_table (info);
6593 if (htab == NULL)
6594 return;
6595
6596 fh = (struct ppc_link_hash_entry *)
6597 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6598 *(char *) p = save;
6599
6600 /* Unfortunately, if it so happens that the string we were
6601 looking for was allocated immediately before this string,
6602 then we overwrote the string terminator. That's the only
6603 reason the lookup should fail. */
6604 if (fh == NULL)
6605 {
6606 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6607 while (q >= eh->elf.root.root.string && *q == *p)
6608 --q, --p;
6609 if (q < eh->elf.root.root.string && *p == '.')
6610 fh = (struct ppc_link_hash_entry *)
6611 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6612 }
6613 if (fh != NULL)
6614 {
6615 eh->oh = fh;
6616 fh->oh = eh;
6617 }
6618 }
6619 if (fh != NULL)
6620 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6621 }
6622 }
6623
6624 static bfd_boolean
6625 get_sym_h (struct elf_link_hash_entry **hp,
6626 Elf_Internal_Sym **symp,
6627 asection **symsecp,
6628 unsigned char **tls_maskp,
6629 Elf_Internal_Sym **locsymsp,
6630 unsigned long r_symndx,
6631 bfd *ibfd)
6632 {
6633 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6634
6635 if (r_symndx >= symtab_hdr->sh_info)
6636 {
6637 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6638 struct elf_link_hash_entry *h;
6639
6640 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6641 h = elf_follow_link (h);
6642
6643 if (hp != NULL)
6644 *hp = h;
6645
6646 if (symp != NULL)
6647 *symp = NULL;
6648
6649 if (symsecp != NULL)
6650 {
6651 asection *symsec = NULL;
6652 if (h->root.type == bfd_link_hash_defined
6653 || h->root.type == bfd_link_hash_defweak)
6654 symsec = h->root.u.def.section;
6655 *symsecp = symsec;
6656 }
6657
6658 if (tls_maskp != NULL)
6659 {
6660 struct ppc_link_hash_entry *eh;
6661
6662 eh = (struct ppc_link_hash_entry *) h;
6663 *tls_maskp = &eh->tls_mask;
6664 }
6665 }
6666 else
6667 {
6668 Elf_Internal_Sym *sym;
6669 Elf_Internal_Sym *locsyms = *locsymsp;
6670
6671 if (locsyms == NULL)
6672 {
6673 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6674 if (locsyms == NULL)
6675 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6676 symtab_hdr->sh_info,
6677 0, NULL, NULL, NULL);
6678 if (locsyms == NULL)
6679 return FALSE;
6680 *locsymsp = locsyms;
6681 }
6682 sym = locsyms + r_symndx;
6683
6684 if (hp != NULL)
6685 *hp = NULL;
6686
6687 if (symp != NULL)
6688 *symp = sym;
6689
6690 if (symsecp != NULL)
6691 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6692
6693 if (tls_maskp != NULL)
6694 {
6695 struct got_entry **lgot_ents;
6696 unsigned char *tls_mask;
6697
6698 tls_mask = NULL;
6699 lgot_ents = elf_local_got_ents (ibfd);
6700 if (lgot_ents != NULL)
6701 {
6702 struct plt_entry **local_plt = (struct plt_entry **)
6703 (lgot_ents + symtab_hdr->sh_info);
6704 unsigned char *lgot_masks = (unsigned char *)
6705 (local_plt + symtab_hdr->sh_info);
6706 tls_mask = &lgot_masks[r_symndx];
6707 }
6708 *tls_maskp = tls_mask;
6709 }
6710 }
6711 return TRUE;
6712 }
6713
6714 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6715 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6716 type suitable for optimization, and 1 otherwise. */
6717
6718 static int
6719 get_tls_mask (unsigned char **tls_maskp,
6720 unsigned long *toc_symndx,
6721 bfd_vma *toc_addend,
6722 Elf_Internal_Sym **locsymsp,
6723 const Elf_Internal_Rela *rel,
6724 bfd *ibfd)
6725 {
6726 unsigned long r_symndx;
6727 int next_r;
6728 struct elf_link_hash_entry *h;
6729 Elf_Internal_Sym *sym;
6730 asection *sec;
6731 bfd_vma off;
6732
6733 r_symndx = ELF64_R_SYM (rel->r_info);
6734 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6735 return 0;
6736
6737 if ((*tls_maskp != NULL && **tls_maskp != 0)
6738 || sec == NULL
6739 || ppc64_elf_section_data (sec) == NULL
6740 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6741 return 1;
6742
6743 /* Look inside a TOC section too. */
6744 if (h != NULL)
6745 {
6746 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6747 off = h->root.u.def.value;
6748 }
6749 else
6750 off = sym->st_value;
6751 off += rel->r_addend;
6752 BFD_ASSERT (off % 8 == 0);
6753 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6754 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6755 if (toc_symndx != NULL)
6756 *toc_symndx = r_symndx;
6757 if (toc_addend != NULL)
6758 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6759 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6760 return 0;
6761 if ((h == NULL || is_static_defined (h))
6762 && (next_r == -1 || next_r == -2))
6763 return 1 - next_r;
6764 return 1;
6765 }
6766
6767 /* Find (or create) an entry in the tocsave hash table. */
6768
6769 static struct tocsave_entry *
6770 tocsave_find (struct ppc_link_hash_table *htab,
6771 enum insert_option insert,
6772 Elf_Internal_Sym **local_syms,
6773 const Elf_Internal_Rela *irela,
6774 bfd *ibfd)
6775 {
6776 unsigned long r_indx;
6777 struct elf_link_hash_entry *h;
6778 Elf_Internal_Sym *sym;
6779 struct tocsave_entry ent, *p;
6780 hashval_t hash;
6781 struct tocsave_entry **slot;
6782
6783 r_indx = ELF64_R_SYM (irela->r_info);
6784 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6785 return NULL;
6786 if (ent.sec == NULL || ent.sec->output_section == NULL)
6787 {
6788 (*_bfd_error_handler)
6789 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6790 return NULL;
6791 }
6792
6793 if (h != NULL)
6794 ent.offset = h->root.u.def.value;
6795 else
6796 ent.offset = sym->st_value;
6797 ent.offset += irela->r_addend;
6798
6799 hash = tocsave_htab_hash (&ent);
6800 slot = ((struct tocsave_entry **)
6801 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6802 if (slot == NULL)
6803 return NULL;
6804
6805 if (*slot == NULL)
6806 {
6807 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6808 if (p == NULL)
6809 return NULL;
6810 *p = ent;
6811 *slot = p;
6812 }
6813 return *slot;
6814 }
6815
6816 /* Adjust all global syms defined in opd sections. In gcc generated
6817 code for the old ABI, these will already have been done. */
6818
6819 static bfd_boolean
6820 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6821 {
6822 struct ppc_link_hash_entry *eh;
6823 asection *sym_sec;
6824 struct _opd_sec_data *opd;
6825
6826 if (h->root.type == bfd_link_hash_indirect)
6827 return TRUE;
6828
6829 if (h->root.type != bfd_link_hash_defined
6830 && h->root.type != bfd_link_hash_defweak)
6831 return TRUE;
6832
6833 eh = (struct ppc_link_hash_entry *) h;
6834 if (eh->adjust_done)
6835 return TRUE;
6836
6837 sym_sec = eh->elf.root.u.def.section;
6838 opd = get_opd_info (sym_sec);
6839 if (opd != NULL && opd->adjust != NULL)
6840 {
6841 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6842 if (adjust == -1)
6843 {
6844 /* This entry has been deleted. */
6845 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6846 if (dsec == NULL)
6847 {
6848 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6849 if (elf_discarded_section (dsec))
6850 {
6851 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6852 break;
6853 }
6854 }
6855 eh->elf.root.u.def.value = 0;
6856 eh->elf.root.u.def.section = dsec;
6857 }
6858 else
6859 eh->elf.root.u.def.value += adjust;
6860 eh->adjust_done = 1;
6861 }
6862 return TRUE;
6863 }
6864
6865 /* Handles decrementing dynamic reloc counts for the reloc specified by
6866 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6867 have already been determined. */
6868
6869 static bfd_boolean
6870 dec_dynrel_count (bfd_vma r_info,
6871 asection *sec,
6872 struct bfd_link_info *info,
6873 Elf_Internal_Sym **local_syms,
6874 struct elf_link_hash_entry *h,
6875 asection *sym_sec)
6876 {
6877 enum elf_ppc64_reloc_type r_type;
6878 struct elf_dyn_relocs *p;
6879 struct elf_dyn_relocs **pp;
6880
6881 /* Can this reloc be dynamic? This switch, and later tests here
6882 should be kept in sync with the code in check_relocs. */
6883 r_type = ELF64_R_TYPE (r_info);
6884 switch (r_type)
6885 {
6886 default:
6887 return TRUE;
6888
6889 case R_PPC64_TPREL16:
6890 case R_PPC64_TPREL16_LO:
6891 case R_PPC64_TPREL16_HI:
6892 case R_PPC64_TPREL16_HA:
6893 case R_PPC64_TPREL16_DS:
6894 case R_PPC64_TPREL16_LO_DS:
6895 case R_PPC64_TPREL16_HIGHER:
6896 case R_PPC64_TPREL16_HIGHERA:
6897 case R_PPC64_TPREL16_HIGHEST:
6898 case R_PPC64_TPREL16_HIGHESTA:
6899 if (!info->shared)
6900 return TRUE;
6901
6902 case R_PPC64_TPREL64:
6903 case R_PPC64_DTPMOD64:
6904 case R_PPC64_DTPREL64:
6905 case R_PPC64_ADDR64:
6906 case R_PPC64_REL30:
6907 case R_PPC64_REL32:
6908 case R_PPC64_REL64:
6909 case R_PPC64_ADDR14:
6910 case R_PPC64_ADDR14_BRNTAKEN:
6911 case R_PPC64_ADDR14_BRTAKEN:
6912 case R_PPC64_ADDR16:
6913 case R_PPC64_ADDR16_DS:
6914 case R_PPC64_ADDR16_HA:
6915 case R_PPC64_ADDR16_HI:
6916 case R_PPC64_ADDR16_HIGHER:
6917 case R_PPC64_ADDR16_HIGHERA:
6918 case R_PPC64_ADDR16_HIGHEST:
6919 case R_PPC64_ADDR16_HIGHESTA:
6920 case R_PPC64_ADDR16_LO:
6921 case R_PPC64_ADDR16_LO_DS:
6922 case R_PPC64_ADDR24:
6923 case R_PPC64_ADDR32:
6924 case R_PPC64_UADDR16:
6925 case R_PPC64_UADDR32:
6926 case R_PPC64_UADDR64:
6927 case R_PPC64_TOC:
6928 break;
6929 }
6930
6931 if (local_syms != NULL)
6932 {
6933 unsigned long r_symndx;
6934 Elf_Internal_Sym *sym;
6935 bfd *ibfd = sec->owner;
6936
6937 r_symndx = ELF64_R_SYM (r_info);
6938 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6939 return FALSE;
6940 }
6941
6942 if ((info->shared
6943 && (must_be_dyn_reloc (info, r_type)
6944 || (h != NULL
6945 && (!info->symbolic
6946 || h->root.type == bfd_link_hash_defweak
6947 || !h->def_regular))))
6948 || (ELIMINATE_COPY_RELOCS
6949 && !info->shared
6950 && h != NULL
6951 && (h->root.type == bfd_link_hash_defweak
6952 || !h->def_regular)))
6953 ;
6954 else
6955 return TRUE;
6956
6957 if (h != NULL)
6958 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6959 else
6960 {
6961 if (sym_sec != NULL)
6962 {
6963 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6964 pp = (struct elf_dyn_relocs **) vpp;
6965 }
6966 else
6967 {
6968 void *vpp = &elf_section_data (sec)->local_dynrel;
6969 pp = (struct elf_dyn_relocs **) vpp;
6970 }
6971
6972 /* elf_gc_sweep may have already removed all dyn relocs associated
6973 with local syms for a given section. Don't report a dynreloc
6974 miscount. */
6975 if (*pp == NULL)
6976 return TRUE;
6977 }
6978
6979 while ((p = *pp) != NULL)
6980 {
6981 if (p->sec == sec)
6982 {
6983 if (!must_be_dyn_reloc (info, r_type))
6984 p->pc_count -= 1;
6985 p->count -= 1;
6986 if (p->count == 0)
6987 *pp = p->next;
6988 return TRUE;
6989 }
6990 pp = &p->next;
6991 }
6992
6993 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
6994 sec->owner, sec);
6995 bfd_set_error (bfd_error_bad_value);
6996 return FALSE;
6997 }
6998
6999 /* Remove unused Official Procedure Descriptor entries. Currently we
7000 only remove those associated with functions in discarded link-once
7001 sections, or weakly defined functions that have been overridden. It
7002 would be possible to remove many more entries for statically linked
7003 applications. */
7004
7005 bfd_boolean
7006 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7007 {
7008 bfd *ibfd;
7009 bfd_boolean some_edited = FALSE;
7010 asection *need_pad = NULL;
7011
7012 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7013 {
7014 asection *sec;
7015 Elf_Internal_Rela *relstart, *rel, *relend;
7016 Elf_Internal_Shdr *symtab_hdr;
7017 Elf_Internal_Sym *local_syms;
7018 bfd_vma offset;
7019 struct _opd_sec_data *opd;
7020 bfd_boolean need_edit, add_aux_fields;
7021 bfd_size_type cnt_16b = 0;
7022
7023 if (!is_ppc64_elf (ibfd))
7024 continue;
7025
7026 sec = bfd_get_section_by_name (ibfd, ".opd");
7027 if (sec == NULL || sec->size == 0)
7028 continue;
7029
7030 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
7031 continue;
7032
7033 if (sec->output_section == bfd_abs_section_ptr)
7034 continue;
7035
7036 /* Look through the section relocs. */
7037 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7038 continue;
7039
7040 local_syms = NULL;
7041 symtab_hdr = &elf_symtab_hdr (ibfd);
7042
7043 /* Read the relocations. */
7044 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7045 info->keep_memory);
7046 if (relstart == NULL)
7047 return FALSE;
7048
7049 /* First run through the relocs to check they are sane, and to
7050 determine whether we need to edit this opd section. */
7051 need_edit = FALSE;
7052 need_pad = sec;
7053 offset = 0;
7054 relend = relstart + sec->reloc_count;
7055 for (rel = relstart; rel < relend; )
7056 {
7057 enum elf_ppc64_reloc_type r_type;
7058 unsigned long r_symndx;
7059 asection *sym_sec;
7060 struct elf_link_hash_entry *h;
7061 Elf_Internal_Sym *sym;
7062
7063 /* .opd contains a regular array of 16 or 24 byte entries. We're
7064 only interested in the reloc pointing to a function entry
7065 point. */
7066 if (rel->r_offset != offset
7067 || rel + 1 >= relend
7068 || (rel + 1)->r_offset != offset + 8)
7069 {
7070 /* If someone messes with .opd alignment then after a
7071 "ld -r" we might have padding in the middle of .opd.
7072 Also, there's nothing to prevent someone putting
7073 something silly in .opd with the assembler. No .opd
7074 optimization for them! */
7075 broken_opd:
7076 (*_bfd_error_handler)
7077 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7078 need_edit = FALSE;
7079 break;
7080 }
7081
7082 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7083 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7084 {
7085 (*_bfd_error_handler)
7086 (_("%B: unexpected reloc type %u in .opd section"),
7087 ibfd, r_type);
7088 need_edit = FALSE;
7089 break;
7090 }
7091
7092 r_symndx = ELF64_R_SYM (rel->r_info);
7093 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7094 r_symndx, ibfd))
7095 goto error_ret;
7096
7097 if (sym_sec == NULL || sym_sec->owner == NULL)
7098 {
7099 const char *sym_name;
7100 if (h != NULL)
7101 sym_name = h->root.root.string;
7102 else
7103 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7104 sym_sec);
7105
7106 (*_bfd_error_handler)
7107 (_("%B: undefined sym `%s' in .opd section"),
7108 ibfd, sym_name);
7109 need_edit = FALSE;
7110 break;
7111 }
7112
7113 /* opd entries are always for functions defined in the
7114 current input bfd. If the symbol isn't defined in the
7115 input bfd, then we won't be using the function in this
7116 bfd; It must be defined in a linkonce section in another
7117 bfd, or is weak. It's also possible that we are
7118 discarding the function due to a linker script /DISCARD/,
7119 which we test for via the output_section. */
7120 if (sym_sec->owner != ibfd
7121 || sym_sec->output_section == bfd_abs_section_ptr)
7122 need_edit = TRUE;
7123
7124 rel += 2;
7125 if (rel == relend
7126 || (rel + 1 == relend && rel->r_offset == offset + 16))
7127 {
7128 if (sec->size == offset + 24)
7129 {
7130 need_pad = NULL;
7131 break;
7132 }
7133 if (rel == relend && sec->size == offset + 16)
7134 {
7135 cnt_16b++;
7136 break;
7137 }
7138 goto broken_opd;
7139 }
7140
7141 if (rel->r_offset == offset + 24)
7142 offset += 24;
7143 else if (rel->r_offset != offset + 16)
7144 goto broken_opd;
7145 else if (rel + 1 < relend
7146 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7147 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7148 {
7149 offset += 16;
7150 cnt_16b++;
7151 }
7152 else if (rel + 2 < relend
7153 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7154 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7155 {
7156 offset += 24;
7157 rel += 1;
7158 }
7159 else
7160 goto broken_opd;
7161 }
7162
7163 add_aux_fields = non_overlapping && cnt_16b > 0;
7164
7165 if (need_edit || add_aux_fields)
7166 {
7167 Elf_Internal_Rela *write_rel;
7168 Elf_Internal_Shdr *rel_hdr;
7169 bfd_byte *rptr, *wptr;
7170 bfd_byte *new_contents;
7171 bfd_boolean skip;
7172 long opd_ent_size;
7173 bfd_size_type amt;
7174
7175 new_contents = NULL;
7176 amt = sec->size * sizeof (long) / 8;
7177 opd = &ppc64_elf_section_data (sec)->u.opd;
7178 opd->adjust = bfd_zalloc (sec->owner, amt);
7179 if (opd->adjust == NULL)
7180 return FALSE;
7181 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7182
7183 /* This seems a waste of time as input .opd sections are all
7184 zeros as generated by gcc, but I suppose there's no reason
7185 this will always be so. We might start putting something in
7186 the third word of .opd entries. */
7187 if ((sec->flags & SEC_IN_MEMORY) == 0)
7188 {
7189 bfd_byte *loc;
7190 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7191 {
7192 if (loc != NULL)
7193 free (loc);
7194 error_ret:
7195 if (local_syms != NULL
7196 && symtab_hdr->contents != (unsigned char *) local_syms)
7197 free (local_syms);
7198 if (elf_section_data (sec)->relocs != relstart)
7199 free (relstart);
7200 return FALSE;
7201 }
7202 sec->contents = loc;
7203 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7204 }
7205
7206 elf_section_data (sec)->relocs = relstart;
7207
7208 new_contents = sec->contents;
7209 if (add_aux_fields)
7210 {
7211 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7212 if (new_contents == NULL)
7213 return FALSE;
7214 need_pad = FALSE;
7215 }
7216 wptr = new_contents;
7217 rptr = sec->contents;
7218
7219 write_rel = relstart;
7220 skip = FALSE;
7221 offset = 0;
7222 opd_ent_size = 0;
7223 for (rel = relstart; rel < relend; rel++)
7224 {
7225 unsigned long r_symndx;
7226 asection *sym_sec;
7227 struct elf_link_hash_entry *h;
7228 Elf_Internal_Sym *sym;
7229
7230 r_symndx = ELF64_R_SYM (rel->r_info);
7231 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7232 r_symndx, ibfd))
7233 goto error_ret;
7234
7235 if (rel->r_offset == offset)
7236 {
7237 struct ppc_link_hash_entry *fdh = NULL;
7238
7239 /* See if the .opd entry is full 24 byte or
7240 16 byte (with fd_aux entry overlapped with next
7241 fd_func). */
7242 opd_ent_size = 24;
7243 if ((rel + 2 == relend && sec->size == offset + 16)
7244 || (rel + 3 < relend
7245 && rel[2].r_offset == offset + 16
7246 && rel[3].r_offset == offset + 24
7247 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7248 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7249 opd_ent_size = 16;
7250
7251 if (h != NULL
7252 && h->root.root.string[0] == '.')
7253 {
7254 struct ppc_link_hash_table *htab;
7255
7256 htab = ppc_hash_table (info);
7257 if (htab != NULL)
7258 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7259 htab);
7260 if (fdh != NULL
7261 && fdh->elf.root.type != bfd_link_hash_defined
7262 && fdh->elf.root.type != bfd_link_hash_defweak)
7263 fdh = NULL;
7264 }
7265
7266 skip = (sym_sec->owner != ibfd
7267 || sym_sec->output_section == bfd_abs_section_ptr);
7268 if (skip)
7269 {
7270 if (fdh != NULL && sym_sec->owner == ibfd)
7271 {
7272 /* Arrange for the function descriptor sym
7273 to be dropped. */
7274 fdh->elf.root.u.def.value = 0;
7275 fdh->elf.root.u.def.section = sym_sec;
7276 }
7277 opd->adjust[rel->r_offset / 8] = -1;
7278 }
7279 else
7280 {
7281 /* We'll be keeping this opd entry. */
7282
7283 if (fdh != NULL)
7284 {
7285 /* Redefine the function descriptor symbol to
7286 this location in the opd section. It is
7287 necessary to update the value here rather
7288 than using an array of adjustments as we do
7289 for local symbols, because various places
7290 in the generic ELF code use the value
7291 stored in u.def.value. */
7292 fdh->elf.root.u.def.value = wptr - new_contents;
7293 fdh->adjust_done = 1;
7294 }
7295
7296 /* Local syms are a bit tricky. We could
7297 tweak them as they can be cached, but
7298 we'd need to look through the local syms
7299 for the function descriptor sym which we
7300 don't have at the moment. So keep an
7301 array of adjustments. */
7302 opd->adjust[rel->r_offset / 8]
7303 = (wptr - new_contents) - (rptr - sec->contents);
7304
7305 if (wptr != rptr)
7306 memcpy (wptr, rptr, opd_ent_size);
7307 wptr += opd_ent_size;
7308 if (add_aux_fields && opd_ent_size == 16)
7309 {
7310 memset (wptr, '\0', 8);
7311 wptr += 8;
7312 }
7313 }
7314 rptr += opd_ent_size;
7315 offset += opd_ent_size;
7316 }
7317
7318 if (skip)
7319 {
7320 if (!NO_OPD_RELOCS
7321 && !info->relocatable
7322 && !dec_dynrel_count (rel->r_info, sec, info,
7323 NULL, h, sym_sec))
7324 goto error_ret;
7325 }
7326 else
7327 {
7328 /* We need to adjust any reloc offsets to point to the
7329 new opd entries. While we're at it, we may as well
7330 remove redundant relocs. */
7331 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7332 if (write_rel != rel)
7333 memcpy (write_rel, rel, sizeof (*rel));
7334 ++write_rel;
7335 }
7336 }
7337
7338 sec->size = wptr - new_contents;
7339 sec->reloc_count = write_rel - relstart;
7340 if (add_aux_fields)
7341 {
7342 free (sec->contents);
7343 sec->contents = new_contents;
7344 }
7345
7346 /* Fudge the header size too, as this is used later in
7347 elf_bfd_final_link if we are emitting relocs. */
7348 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7349 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7350 some_edited = TRUE;
7351 }
7352 else if (elf_section_data (sec)->relocs != relstart)
7353 free (relstart);
7354
7355 if (local_syms != NULL
7356 && symtab_hdr->contents != (unsigned char *) local_syms)
7357 {
7358 if (!info->keep_memory)
7359 free (local_syms);
7360 else
7361 symtab_hdr->contents = (unsigned char *) local_syms;
7362 }
7363 }
7364
7365 if (some_edited)
7366 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7367
7368 /* If we are doing a final link and the last .opd entry is just 16 byte
7369 long, add a 8 byte padding after it. */
7370 if (need_pad != NULL && !info->relocatable)
7371 {
7372 bfd_byte *p;
7373
7374 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7375 {
7376 BFD_ASSERT (need_pad->size > 0);
7377
7378 p = bfd_malloc (need_pad->size + 8);
7379 if (p == NULL)
7380 return FALSE;
7381
7382 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7383 p, 0, need_pad->size))
7384 return FALSE;
7385
7386 need_pad->contents = p;
7387 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7388 }
7389 else
7390 {
7391 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7392 if (p == NULL)
7393 return FALSE;
7394
7395 need_pad->contents = p;
7396 }
7397
7398 memset (need_pad->contents + need_pad->size, 0, 8);
7399 need_pad->size += 8;
7400 }
7401
7402 return TRUE;
7403 }
7404
7405 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7406
7407 asection *
7408 ppc64_elf_tls_setup (struct bfd_link_info *info,
7409 int no_tls_get_addr_opt,
7410 int *no_multi_toc)
7411 {
7412 struct ppc_link_hash_table *htab;
7413
7414 htab = ppc_hash_table (info);
7415 if (htab == NULL)
7416 return NULL;
7417
7418 if (*no_multi_toc)
7419 htab->do_multi_toc = 0;
7420 else if (!htab->do_multi_toc)
7421 *no_multi_toc = 1;
7422
7423 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7424 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7425 FALSE, FALSE, TRUE));
7426 /* Move dynamic linking info to the function descriptor sym. */
7427 if (htab->tls_get_addr != NULL)
7428 func_desc_adjust (&htab->tls_get_addr->elf, info);
7429 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7430 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7431 FALSE, FALSE, TRUE));
7432 if (!no_tls_get_addr_opt)
7433 {
7434 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7435
7436 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7437 FALSE, FALSE, TRUE);
7438 if (opt != NULL)
7439 func_desc_adjust (opt, info);
7440 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7441 FALSE, FALSE, TRUE);
7442 if (opt_fd != NULL
7443 && (opt_fd->root.type == bfd_link_hash_defined
7444 || opt_fd->root.type == bfd_link_hash_defweak))
7445 {
7446 /* If glibc supports an optimized __tls_get_addr call stub,
7447 signalled by the presence of __tls_get_addr_opt, and we'll
7448 be calling __tls_get_addr via a plt call stub, then
7449 make __tls_get_addr point to __tls_get_addr_opt. */
7450 tga_fd = &htab->tls_get_addr_fd->elf;
7451 if (htab->elf.dynamic_sections_created
7452 && tga_fd != NULL
7453 && (tga_fd->type == STT_FUNC
7454 || tga_fd->needs_plt)
7455 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7456 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7457 && tga_fd->root.type == bfd_link_hash_undefweak)))
7458 {
7459 struct plt_entry *ent;
7460
7461 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7462 if (ent->plt.refcount > 0)
7463 break;
7464 if (ent != NULL)
7465 {
7466 tga_fd->root.type = bfd_link_hash_indirect;
7467 tga_fd->root.u.i.link = &opt_fd->root;
7468 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7469 if (opt_fd->dynindx != -1)
7470 {
7471 /* Use __tls_get_addr_opt in dynamic relocations. */
7472 opt_fd->dynindx = -1;
7473 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7474 opt_fd->dynstr_index);
7475 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7476 return NULL;
7477 }
7478 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7479 tga = &htab->tls_get_addr->elf;
7480 if (opt != NULL && tga != NULL)
7481 {
7482 tga->root.type = bfd_link_hash_indirect;
7483 tga->root.u.i.link = &opt->root;
7484 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7485 _bfd_elf_link_hash_hide_symbol (info, opt,
7486 tga->forced_local);
7487 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7488 }
7489 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7490 htab->tls_get_addr_fd->is_func_descriptor = 1;
7491 if (htab->tls_get_addr != NULL)
7492 {
7493 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7494 htab->tls_get_addr->is_func = 1;
7495 }
7496 }
7497 }
7498 }
7499 else
7500 no_tls_get_addr_opt = TRUE;
7501 }
7502 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7503 return _bfd_elf_tls_setup (info->output_bfd, info);
7504 }
7505
7506 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7507 HASH1 or HASH2. */
7508
7509 static bfd_boolean
7510 branch_reloc_hash_match (const bfd *ibfd,
7511 const Elf_Internal_Rela *rel,
7512 const struct ppc_link_hash_entry *hash1,
7513 const struct ppc_link_hash_entry *hash2)
7514 {
7515 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7516 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7517 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7518
7519 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7520 {
7521 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7522 struct elf_link_hash_entry *h;
7523
7524 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7525 h = elf_follow_link (h);
7526 if (h == &hash1->elf || h == &hash2->elf)
7527 return TRUE;
7528 }
7529 return FALSE;
7530 }
7531
7532 /* Run through all the TLS relocs looking for optimization
7533 opportunities. The linker has been hacked (see ppc64elf.em) to do
7534 a preliminary section layout so that we know the TLS segment
7535 offsets. We can't optimize earlier because some optimizations need
7536 to know the tp offset, and we need to optimize before allocating
7537 dynamic relocations. */
7538
7539 bfd_boolean
7540 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7541 {
7542 bfd *ibfd;
7543 asection *sec;
7544 struct ppc_link_hash_table *htab;
7545 unsigned char *toc_ref;
7546 int pass;
7547
7548 if (info->relocatable || !info->executable)
7549 return TRUE;
7550
7551 htab = ppc_hash_table (info);
7552 if (htab == NULL)
7553 return FALSE;
7554
7555 /* Make two passes over the relocs. On the first pass, mark toc
7556 entries involved with tls relocs, and check that tls relocs
7557 involved in setting up a tls_get_addr call are indeed followed by
7558 such a call. If they are not, we can't do any tls optimization.
7559 On the second pass twiddle tls_mask flags to notify
7560 relocate_section that optimization can be done, and adjust got
7561 and plt refcounts. */
7562 toc_ref = NULL;
7563 for (pass = 0; pass < 2; ++pass)
7564 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7565 {
7566 Elf_Internal_Sym *locsyms = NULL;
7567 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7568
7569 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7570 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7571 {
7572 Elf_Internal_Rela *relstart, *rel, *relend;
7573 bfd_boolean found_tls_get_addr_arg = 0;
7574
7575 /* Read the relocations. */
7576 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7577 info->keep_memory);
7578 if (relstart == NULL)
7579 return FALSE;
7580
7581 relend = relstart + sec->reloc_count;
7582 for (rel = relstart; rel < relend; rel++)
7583 {
7584 enum elf_ppc64_reloc_type r_type;
7585 unsigned long r_symndx;
7586 struct elf_link_hash_entry *h;
7587 Elf_Internal_Sym *sym;
7588 asection *sym_sec;
7589 unsigned char *tls_mask;
7590 unsigned char tls_set, tls_clear, tls_type = 0;
7591 bfd_vma value;
7592 bfd_boolean ok_tprel, is_local;
7593 long toc_ref_index = 0;
7594 int expecting_tls_get_addr = 0;
7595 bfd_boolean ret = FALSE;
7596
7597 r_symndx = ELF64_R_SYM (rel->r_info);
7598 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7599 r_symndx, ibfd))
7600 {
7601 err_free_rel:
7602 if (elf_section_data (sec)->relocs != relstart)
7603 free (relstart);
7604 if (toc_ref != NULL)
7605 free (toc_ref);
7606 if (locsyms != NULL
7607 && (elf_symtab_hdr (ibfd).contents
7608 != (unsigned char *) locsyms))
7609 free (locsyms);
7610 return ret;
7611 }
7612
7613 if (h != NULL)
7614 {
7615 if (h->root.type == bfd_link_hash_defined
7616 || h->root.type == bfd_link_hash_defweak)
7617 value = h->root.u.def.value;
7618 else if (h->root.type == bfd_link_hash_undefweak)
7619 value = 0;
7620 else
7621 {
7622 found_tls_get_addr_arg = 0;
7623 continue;
7624 }
7625 }
7626 else
7627 /* Symbols referenced by TLS relocs must be of type
7628 STT_TLS. So no need for .opd local sym adjust. */
7629 value = sym->st_value;
7630
7631 ok_tprel = FALSE;
7632 is_local = FALSE;
7633 if (h == NULL
7634 || !h->def_dynamic)
7635 {
7636 is_local = TRUE;
7637 if (h != NULL
7638 && h->root.type == bfd_link_hash_undefweak)
7639 ok_tprel = TRUE;
7640 else
7641 {
7642 value += sym_sec->output_offset;
7643 value += sym_sec->output_section->vma;
7644 value -= htab->elf.tls_sec->vma;
7645 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7646 < (bfd_vma) 1 << 32);
7647 }
7648 }
7649
7650 r_type = ELF64_R_TYPE (rel->r_info);
7651 /* If this section has old-style __tls_get_addr calls
7652 without marker relocs, then check that each
7653 __tls_get_addr call reloc is preceded by a reloc
7654 that conceivably belongs to the __tls_get_addr arg
7655 setup insn. If we don't find matching arg setup
7656 relocs, don't do any tls optimization. */
7657 if (pass == 0
7658 && sec->has_tls_get_addr_call
7659 && h != NULL
7660 && (h == &htab->tls_get_addr->elf
7661 || h == &htab->tls_get_addr_fd->elf)
7662 && !found_tls_get_addr_arg
7663 && is_branch_reloc (r_type))
7664 {
7665 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7666 "TLS optimization disabled\n"),
7667 ibfd, sec, rel->r_offset);
7668 ret = TRUE;
7669 goto err_free_rel;
7670 }
7671
7672 found_tls_get_addr_arg = 0;
7673 switch (r_type)
7674 {
7675 case R_PPC64_GOT_TLSLD16:
7676 case R_PPC64_GOT_TLSLD16_LO:
7677 expecting_tls_get_addr = 1;
7678 found_tls_get_addr_arg = 1;
7679 /* Fall thru */
7680
7681 case R_PPC64_GOT_TLSLD16_HI:
7682 case R_PPC64_GOT_TLSLD16_HA:
7683 /* These relocs should never be against a symbol
7684 defined in a shared lib. Leave them alone if
7685 that turns out to be the case. */
7686 if (!is_local)
7687 continue;
7688
7689 /* LD -> LE */
7690 tls_set = 0;
7691 tls_clear = TLS_LD;
7692 tls_type = TLS_TLS | TLS_LD;
7693 break;
7694
7695 case R_PPC64_GOT_TLSGD16:
7696 case R_PPC64_GOT_TLSGD16_LO:
7697 expecting_tls_get_addr = 1;
7698 found_tls_get_addr_arg = 1;
7699 /* Fall thru */
7700
7701 case R_PPC64_GOT_TLSGD16_HI:
7702 case R_PPC64_GOT_TLSGD16_HA:
7703 if (ok_tprel)
7704 /* GD -> LE */
7705 tls_set = 0;
7706 else
7707 /* GD -> IE */
7708 tls_set = TLS_TLS | TLS_TPRELGD;
7709 tls_clear = TLS_GD;
7710 tls_type = TLS_TLS | TLS_GD;
7711 break;
7712
7713 case R_PPC64_GOT_TPREL16_DS:
7714 case R_PPC64_GOT_TPREL16_LO_DS:
7715 case R_PPC64_GOT_TPREL16_HI:
7716 case R_PPC64_GOT_TPREL16_HA:
7717 if (ok_tprel)
7718 {
7719 /* IE -> LE */
7720 tls_set = 0;
7721 tls_clear = TLS_TPREL;
7722 tls_type = TLS_TLS | TLS_TPREL;
7723 break;
7724 }
7725 continue;
7726
7727 case R_PPC64_TLSGD:
7728 case R_PPC64_TLSLD:
7729 found_tls_get_addr_arg = 1;
7730 /* Fall thru */
7731
7732 case R_PPC64_TLS:
7733 case R_PPC64_TOC16:
7734 case R_PPC64_TOC16_LO:
7735 if (sym_sec == NULL || sym_sec != toc)
7736 continue;
7737
7738 /* Mark this toc entry as referenced by a TLS
7739 code sequence. We can do that now in the
7740 case of R_PPC64_TLS, and after checking for
7741 tls_get_addr for the TOC16 relocs. */
7742 if (toc_ref == NULL)
7743 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7744 if (toc_ref == NULL)
7745 goto err_free_rel;
7746
7747 if (h != NULL)
7748 value = h->root.u.def.value;
7749 else
7750 value = sym->st_value;
7751 value += rel->r_addend;
7752 BFD_ASSERT (value < toc->size && value % 8 == 0);
7753 toc_ref_index = (value + toc->output_offset) / 8;
7754 if (r_type == R_PPC64_TLS
7755 || r_type == R_PPC64_TLSGD
7756 || r_type == R_PPC64_TLSLD)
7757 {
7758 toc_ref[toc_ref_index] = 1;
7759 continue;
7760 }
7761
7762 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7763 continue;
7764
7765 tls_set = 0;
7766 tls_clear = 0;
7767 expecting_tls_get_addr = 2;
7768 break;
7769
7770 case R_PPC64_TPREL64:
7771 if (pass == 0
7772 || sec != toc
7773 || toc_ref == NULL
7774 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7775 continue;
7776 if (ok_tprel)
7777 {
7778 /* IE -> LE */
7779 tls_set = TLS_EXPLICIT;
7780 tls_clear = TLS_TPREL;
7781 break;
7782 }
7783 continue;
7784
7785 case R_PPC64_DTPMOD64:
7786 if (pass == 0
7787 || sec != toc
7788 || toc_ref == NULL
7789 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7790 continue;
7791 if (rel + 1 < relend
7792 && (rel[1].r_info
7793 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7794 && rel[1].r_offset == rel->r_offset + 8)
7795 {
7796 if (ok_tprel)
7797 /* GD -> LE */
7798 tls_set = TLS_EXPLICIT | TLS_GD;
7799 else
7800 /* GD -> IE */
7801 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7802 tls_clear = TLS_GD;
7803 }
7804 else
7805 {
7806 if (!is_local)
7807 continue;
7808
7809 /* LD -> LE */
7810 tls_set = TLS_EXPLICIT;
7811 tls_clear = TLS_LD;
7812 }
7813 break;
7814
7815 default:
7816 continue;
7817 }
7818
7819 if (pass == 0)
7820 {
7821 if (!expecting_tls_get_addr
7822 || !sec->has_tls_get_addr_call)
7823 continue;
7824
7825 if (rel + 1 < relend
7826 && branch_reloc_hash_match (ibfd, rel + 1,
7827 htab->tls_get_addr,
7828 htab->tls_get_addr_fd))
7829 {
7830 if (expecting_tls_get_addr == 2)
7831 {
7832 /* Check for toc tls entries. */
7833 unsigned char *toc_tls;
7834 int retval;
7835
7836 retval = get_tls_mask (&toc_tls, NULL, NULL,
7837 &locsyms,
7838 rel, ibfd);
7839 if (retval == 0)
7840 goto err_free_rel;
7841 if (toc_tls != NULL)
7842 {
7843 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7844 found_tls_get_addr_arg = 1;
7845 if (retval > 1)
7846 toc_ref[toc_ref_index] = 1;
7847 }
7848 }
7849 continue;
7850 }
7851
7852 if (expecting_tls_get_addr != 1)
7853 continue;
7854
7855 /* Uh oh, we didn't find the expected call. We
7856 could just mark this symbol to exclude it
7857 from tls optimization but it's safer to skip
7858 the entire optimization. */
7859 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7860 "TLS optimization disabled\n"),
7861 ibfd, sec, rel->r_offset);
7862 ret = TRUE;
7863 goto err_free_rel;
7864 }
7865
7866 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7867 {
7868 struct plt_entry *ent;
7869 for (ent = htab->tls_get_addr->elf.plt.plist;
7870 ent != NULL;
7871 ent = ent->next)
7872 if (ent->addend == 0)
7873 {
7874 if (ent->plt.refcount > 0)
7875 {
7876 ent->plt.refcount -= 1;
7877 expecting_tls_get_addr = 0;
7878 }
7879 break;
7880 }
7881 }
7882
7883 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7884 {
7885 struct plt_entry *ent;
7886 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7887 ent != NULL;
7888 ent = ent->next)
7889 if (ent->addend == 0)
7890 {
7891 if (ent->plt.refcount > 0)
7892 ent->plt.refcount -= 1;
7893 break;
7894 }
7895 }
7896
7897 if (tls_clear == 0)
7898 continue;
7899
7900 if ((tls_set & TLS_EXPLICIT) == 0)
7901 {
7902 struct got_entry *ent;
7903
7904 /* Adjust got entry for this reloc. */
7905 if (h != NULL)
7906 ent = h->got.glist;
7907 else
7908 ent = elf_local_got_ents (ibfd)[r_symndx];
7909
7910 for (; ent != NULL; ent = ent->next)
7911 if (ent->addend == rel->r_addend
7912 && ent->owner == ibfd
7913 && ent->tls_type == tls_type)
7914 break;
7915 if (ent == NULL)
7916 abort ();
7917
7918 if (tls_set == 0)
7919 {
7920 /* We managed to get rid of a got entry. */
7921 if (ent->got.refcount > 0)
7922 ent->got.refcount -= 1;
7923 }
7924 }
7925 else
7926 {
7927 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7928 we'll lose one or two dyn relocs. */
7929 if (!dec_dynrel_count (rel->r_info, sec, info,
7930 NULL, h, sym_sec))
7931 return FALSE;
7932
7933 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7934 {
7935 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7936 NULL, h, sym_sec))
7937 return FALSE;
7938 }
7939 }
7940
7941 *tls_mask |= tls_set;
7942 *tls_mask &= ~tls_clear;
7943 }
7944
7945 if (elf_section_data (sec)->relocs != relstart)
7946 free (relstart);
7947 }
7948
7949 if (locsyms != NULL
7950 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7951 {
7952 if (!info->keep_memory)
7953 free (locsyms);
7954 else
7955 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7956 }
7957 }
7958
7959 if (toc_ref != NULL)
7960 free (toc_ref);
7961 return TRUE;
7962 }
7963
7964 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7965 the values of any global symbols in a toc section that has been
7966 edited. Globals in toc sections should be a rarity, so this function
7967 sets a flag if any are found in toc sections other than the one just
7968 edited, so that futher hash table traversals can be avoided. */
7969
7970 struct adjust_toc_info
7971 {
7972 asection *toc;
7973 unsigned long *skip;
7974 bfd_boolean global_toc_syms;
7975 };
7976
7977 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7978
7979 static bfd_boolean
7980 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7981 {
7982 struct ppc_link_hash_entry *eh;
7983 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7984 unsigned long i;
7985
7986 if (h->root.type != bfd_link_hash_defined
7987 && h->root.type != bfd_link_hash_defweak)
7988 return TRUE;
7989
7990 eh = (struct ppc_link_hash_entry *) h;
7991 if (eh->adjust_done)
7992 return TRUE;
7993
7994 if (eh->elf.root.u.def.section == toc_inf->toc)
7995 {
7996 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7997 i = toc_inf->toc->rawsize >> 3;
7998 else
7999 i = eh->elf.root.u.def.value >> 3;
8000
8001 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8002 {
8003 (*_bfd_error_handler)
8004 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8005 do
8006 ++i;
8007 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8008 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8009 }
8010
8011 eh->elf.root.u.def.value -= toc_inf->skip[i];
8012 eh->adjust_done = 1;
8013 }
8014 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8015 toc_inf->global_toc_syms = TRUE;
8016
8017 return TRUE;
8018 }
8019
8020 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8021
8022 static bfd_boolean
8023 ok_lo_toc_insn (unsigned int insn)
8024 {
8025 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8026 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8027 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8028 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8029 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8030 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8031 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8032 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8033 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8034 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8035 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8036 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8037 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8038 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8039 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8040 && (insn & 3) != 1)
8041 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8042 && ((insn & 3) == 0 || (insn & 3) == 3))
8043 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8044 }
8045
8046 /* Examine all relocs referencing .toc sections in order to remove
8047 unused .toc entries. */
8048
8049 bfd_boolean
8050 ppc64_elf_edit_toc (struct bfd_link_info *info)
8051 {
8052 bfd *ibfd;
8053 struct adjust_toc_info toc_inf;
8054 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8055
8056 htab->do_toc_opt = 1;
8057 toc_inf.global_toc_syms = TRUE;
8058 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8059 {
8060 asection *toc, *sec;
8061 Elf_Internal_Shdr *symtab_hdr;
8062 Elf_Internal_Sym *local_syms;
8063 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8064 unsigned long *skip, *drop;
8065 unsigned char *used;
8066 unsigned char *keep, last, some_unused;
8067
8068 if (!is_ppc64_elf (ibfd))
8069 continue;
8070
8071 toc = bfd_get_section_by_name (ibfd, ".toc");
8072 if (toc == NULL
8073 || toc->size == 0
8074 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
8075 || elf_discarded_section (toc))
8076 continue;
8077
8078 toc_relocs = NULL;
8079 local_syms = NULL;
8080 symtab_hdr = &elf_symtab_hdr (ibfd);
8081
8082 /* Look at sections dropped from the final link. */
8083 skip = NULL;
8084 relstart = NULL;
8085 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8086 {
8087 if (sec->reloc_count == 0
8088 || !elf_discarded_section (sec)
8089 || get_opd_info (sec)
8090 || (sec->flags & SEC_ALLOC) == 0
8091 || (sec->flags & SEC_DEBUGGING) != 0)
8092 continue;
8093
8094 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8095 if (relstart == NULL)
8096 goto error_ret;
8097
8098 /* Run through the relocs to see which toc entries might be
8099 unused. */
8100 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8101 {
8102 enum elf_ppc64_reloc_type r_type;
8103 unsigned long r_symndx;
8104 asection *sym_sec;
8105 struct elf_link_hash_entry *h;
8106 Elf_Internal_Sym *sym;
8107 bfd_vma val;
8108
8109 r_type = ELF64_R_TYPE (rel->r_info);
8110 switch (r_type)
8111 {
8112 default:
8113 continue;
8114
8115 case R_PPC64_TOC16:
8116 case R_PPC64_TOC16_LO:
8117 case R_PPC64_TOC16_HI:
8118 case R_PPC64_TOC16_HA:
8119 case R_PPC64_TOC16_DS:
8120 case R_PPC64_TOC16_LO_DS:
8121 break;
8122 }
8123
8124 r_symndx = ELF64_R_SYM (rel->r_info);
8125 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8126 r_symndx, ibfd))
8127 goto error_ret;
8128
8129 if (sym_sec != toc)
8130 continue;
8131
8132 if (h != NULL)
8133 val = h->root.u.def.value;
8134 else
8135 val = sym->st_value;
8136 val += rel->r_addend;
8137
8138 if (val >= toc->size)
8139 continue;
8140
8141 /* Anything in the toc ought to be aligned to 8 bytes.
8142 If not, don't mark as unused. */
8143 if (val & 7)
8144 continue;
8145
8146 if (skip == NULL)
8147 {
8148 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8149 if (skip == NULL)
8150 goto error_ret;
8151 }
8152
8153 skip[val >> 3] = ref_from_discarded;
8154 }
8155
8156 if (elf_section_data (sec)->relocs != relstart)
8157 free (relstart);
8158 }
8159
8160 /* For largetoc loads of address constants, we can convert
8161 . addis rx,2,addr@got@ha
8162 . ld ry,addr@got@l(rx)
8163 to
8164 . addis rx,2,addr@toc@ha
8165 . addi ry,rx,addr@toc@l
8166 when addr is within 2G of the toc pointer. This then means
8167 that the word storing "addr" in the toc is no longer needed. */
8168
8169 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8170 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8171 && toc->reloc_count != 0)
8172 {
8173 /* Read toc relocs. */
8174 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8175 info->keep_memory);
8176 if (toc_relocs == NULL)
8177 goto error_ret;
8178
8179 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8180 {
8181 enum elf_ppc64_reloc_type r_type;
8182 unsigned long r_symndx;
8183 asection *sym_sec;
8184 struct elf_link_hash_entry *h;
8185 Elf_Internal_Sym *sym;
8186 bfd_vma val, addr;
8187
8188 r_type = ELF64_R_TYPE (rel->r_info);
8189 if (r_type != R_PPC64_ADDR64)
8190 continue;
8191
8192 r_symndx = ELF64_R_SYM (rel->r_info);
8193 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8194 r_symndx, ibfd))
8195 goto error_ret;
8196
8197 if (sym_sec == NULL
8198 || elf_discarded_section (sym_sec))
8199 continue;
8200
8201 if (!SYMBOL_CALLS_LOCAL (info, h))
8202 continue;
8203
8204 if (h != NULL)
8205 {
8206 if (h->type == STT_GNU_IFUNC)
8207 continue;
8208 val = h->root.u.def.value;
8209 }
8210 else
8211 {
8212 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8213 continue;
8214 val = sym->st_value;
8215 }
8216 val += rel->r_addend;
8217 val += sym_sec->output_section->vma + sym_sec->output_offset;
8218
8219 /* We don't yet know the exact toc pointer value, but we
8220 know it will be somewhere in the toc section. Don't
8221 optimize if the difference from any possible toc
8222 pointer is outside [ff..f80008000, 7fff7fff]. */
8223 addr = toc->output_section->vma + TOC_BASE_OFF;
8224 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8225 continue;
8226
8227 addr = toc->output_section->vma + toc->output_section->rawsize;
8228 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8229 continue;
8230
8231 if (skip == NULL)
8232 {
8233 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8234 if (skip == NULL)
8235 goto error_ret;
8236 }
8237
8238 skip[rel->r_offset >> 3]
8239 |= can_optimize | ((rel - toc_relocs) << 2);
8240 }
8241 }
8242
8243 if (skip == NULL)
8244 continue;
8245
8246 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8247 if (used == NULL)
8248 {
8249 error_ret:
8250 if (local_syms != NULL
8251 && symtab_hdr->contents != (unsigned char *) local_syms)
8252 free (local_syms);
8253 if (sec != NULL
8254 && relstart != NULL
8255 && elf_section_data (sec)->relocs != relstart)
8256 free (relstart);
8257 if (toc_relocs != NULL
8258 && elf_section_data (toc)->relocs != toc_relocs)
8259 free (toc_relocs);
8260 if (skip != NULL)
8261 free (skip);
8262 return FALSE;
8263 }
8264
8265 /* Now check all kept sections that might reference the toc.
8266 Check the toc itself last. */
8267 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8268 : ibfd->sections);
8269 sec != NULL;
8270 sec = (sec == toc ? NULL
8271 : sec->next == NULL ? toc
8272 : sec->next == toc && toc->next ? toc->next
8273 : sec->next))
8274 {
8275 int repeat;
8276
8277 if (sec->reloc_count == 0
8278 || elf_discarded_section (sec)
8279 || get_opd_info (sec)
8280 || (sec->flags & SEC_ALLOC) == 0
8281 || (sec->flags & SEC_DEBUGGING) != 0)
8282 continue;
8283
8284 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8285 info->keep_memory);
8286 if (relstart == NULL)
8287 goto error_ret;
8288
8289 /* Mark toc entries referenced as used. */
8290 repeat = 0;
8291 do
8292 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8293 {
8294 enum elf_ppc64_reloc_type r_type;
8295 unsigned long r_symndx;
8296 asection *sym_sec;
8297 struct elf_link_hash_entry *h;
8298 Elf_Internal_Sym *sym;
8299 bfd_vma val;
8300 enum {no_check, check_lo, check_ha} insn_check;
8301
8302 r_type = ELF64_R_TYPE (rel->r_info);
8303 switch (r_type)
8304 {
8305 default:
8306 insn_check = no_check;
8307 break;
8308
8309 case R_PPC64_GOT_TLSLD16_HA:
8310 case R_PPC64_GOT_TLSGD16_HA:
8311 case R_PPC64_GOT_TPREL16_HA:
8312 case R_PPC64_GOT_DTPREL16_HA:
8313 case R_PPC64_GOT16_HA:
8314 case R_PPC64_TOC16_HA:
8315 insn_check = check_ha;
8316 break;
8317
8318 case R_PPC64_GOT_TLSLD16_LO:
8319 case R_PPC64_GOT_TLSGD16_LO:
8320 case R_PPC64_GOT_TPREL16_LO_DS:
8321 case R_PPC64_GOT_DTPREL16_LO_DS:
8322 case R_PPC64_GOT16_LO:
8323 case R_PPC64_GOT16_LO_DS:
8324 case R_PPC64_TOC16_LO:
8325 case R_PPC64_TOC16_LO_DS:
8326 insn_check = check_lo;
8327 break;
8328 }
8329
8330 if (insn_check != no_check)
8331 {
8332 bfd_vma off = rel->r_offset & ~3;
8333 unsigned char buf[4];
8334 unsigned int insn;
8335
8336 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8337 {
8338 free (used);
8339 goto error_ret;
8340 }
8341 insn = bfd_get_32 (ibfd, buf);
8342 if (insn_check == check_lo
8343 ? !ok_lo_toc_insn (insn)
8344 : ((insn & ((0x3f << 26) | 0x1f << 16))
8345 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8346 {
8347 char str[12];
8348
8349 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8350 sprintf (str, "%#08x", insn);
8351 info->callbacks->einfo
8352 (_("%P: %H: toc optimization is not supported for"
8353 " %s instruction.\n"),
8354 ibfd, sec, rel->r_offset & ~3, str);
8355 }
8356 }
8357
8358 switch (r_type)
8359 {
8360 case R_PPC64_TOC16:
8361 case R_PPC64_TOC16_LO:
8362 case R_PPC64_TOC16_HI:
8363 case R_PPC64_TOC16_HA:
8364 case R_PPC64_TOC16_DS:
8365 case R_PPC64_TOC16_LO_DS:
8366 /* In case we're taking addresses of toc entries. */
8367 case R_PPC64_ADDR64:
8368 break;
8369
8370 default:
8371 continue;
8372 }
8373
8374 r_symndx = ELF64_R_SYM (rel->r_info);
8375 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8376 r_symndx, ibfd))
8377 {
8378 free (used);
8379 goto error_ret;
8380 }
8381
8382 if (sym_sec != toc)
8383 continue;
8384
8385 if (h != NULL)
8386 val = h->root.u.def.value;
8387 else
8388 val = sym->st_value;
8389 val += rel->r_addend;
8390
8391 if (val >= toc->size)
8392 continue;
8393
8394 if ((skip[val >> 3] & can_optimize) != 0)
8395 {
8396 bfd_vma off;
8397 unsigned char opc;
8398
8399 switch (r_type)
8400 {
8401 case R_PPC64_TOC16_HA:
8402 break;
8403
8404 case R_PPC64_TOC16_LO_DS:
8405 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8406 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8407 {
8408 free (used);
8409 goto error_ret;
8410 }
8411 if ((opc & (0x3f << 2)) == (58u << 2))
8412 break;
8413 /* Fall thru */
8414
8415 default:
8416 /* Wrong sort of reloc, or not a ld. We may
8417 as well clear ref_from_discarded too. */
8418 skip[val >> 3] = 0;
8419 }
8420 }
8421
8422 /* For the toc section, we only mark as used if
8423 this entry itself isn't unused. */
8424 if (sec == toc
8425 && !used[val >> 3]
8426 && (used[rel->r_offset >> 3]
8427 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8428 /* Do all the relocs again, to catch reference
8429 chains. */
8430 repeat = 1;
8431
8432 used[val >> 3] = 1;
8433 }
8434 while (repeat);
8435
8436 if (elf_section_data (sec)->relocs != relstart)
8437 free (relstart);
8438 }
8439
8440 /* Merge the used and skip arrays. Assume that TOC
8441 doublewords not appearing as either used or unused belong
8442 to to an entry more than one doubleword in size. */
8443 for (drop = skip, keep = used, last = 0, some_unused = 0;
8444 drop < skip + (toc->size + 7) / 8;
8445 ++drop, ++keep)
8446 {
8447 if (*keep)
8448 {
8449 *drop &= ~ref_from_discarded;
8450 if ((*drop & can_optimize) != 0)
8451 some_unused = 1;
8452 last = 0;
8453 }
8454 else if ((*drop & ref_from_discarded) != 0)
8455 {
8456 some_unused = 1;
8457 last = ref_from_discarded;
8458 }
8459 else
8460 *drop = last;
8461 }
8462
8463 free (used);
8464
8465 if (some_unused)
8466 {
8467 bfd_byte *contents, *src;
8468 unsigned long off;
8469 Elf_Internal_Sym *sym;
8470 bfd_boolean local_toc_syms = FALSE;
8471
8472 /* Shuffle the toc contents, and at the same time convert the
8473 skip array from booleans into offsets. */
8474 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8475 goto error_ret;
8476
8477 elf_section_data (toc)->this_hdr.contents = contents;
8478
8479 for (src = contents, off = 0, drop = skip;
8480 src < contents + toc->size;
8481 src += 8, ++drop)
8482 {
8483 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8484 off += 8;
8485 else if (off != 0)
8486 {
8487 *drop = off;
8488 memcpy (src - off, src, 8);
8489 }
8490 }
8491 *drop = off;
8492 toc->rawsize = toc->size;
8493 toc->size = src - contents - off;
8494
8495 /* Adjust addends for relocs against the toc section sym,
8496 and optimize any accesses we can. */
8497 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8498 {
8499 if (sec->reloc_count == 0
8500 || elf_discarded_section (sec))
8501 continue;
8502
8503 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8504 info->keep_memory);
8505 if (relstart == NULL)
8506 goto error_ret;
8507
8508 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8509 {
8510 enum elf_ppc64_reloc_type r_type;
8511 unsigned long r_symndx;
8512 asection *sym_sec;
8513 struct elf_link_hash_entry *h;
8514 bfd_vma val;
8515
8516 r_type = ELF64_R_TYPE (rel->r_info);
8517 switch (r_type)
8518 {
8519 default:
8520 continue;
8521
8522 case R_PPC64_TOC16:
8523 case R_PPC64_TOC16_LO:
8524 case R_PPC64_TOC16_HI:
8525 case R_PPC64_TOC16_HA:
8526 case R_PPC64_TOC16_DS:
8527 case R_PPC64_TOC16_LO_DS:
8528 case R_PPC64_ADDR64:
8529 break;
8530 }
8531
8532 r_symndx = ELF64_R_SYM (rel->r_info);
8533 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8534 r_symndx, ibfd))
8535 goto error_ret;
8536
8537 if (sym_sec != toc)
8538 continue;
8539
8540 if (h != NULL)
8541 val = h->root.u.def.value;
8542 else
8543 {
8544 val = sym->st_value;
8545 if (val != 0)
8546 local_toc_syms = TRUE;
8547 }
8548
8549 val += rel->r_addend;
8550
8551 if (val > toc->rawsize)
8552 val = toc->rawsize;
8553 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8554 continue;
8555 else if ((skip[val >> 3] & can_optimize) != 0)
8556 {
8557 Elf_Internal_Rela *tocrel
8558 = toc_relocs + (skip[val >> 3] >> 2);
8559 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8560
8561 switch (r_type)
8562 {
8563 case R_PPC64_TOC16_HA:
8564 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8565 break;
8566
8567 case R_PPC64_TOC16_LO_DS:
8568 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8569 break;
8570
8571 default:
8572 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8573 ppc_howto_init ();
8574 info->callbacks->einfo
8575 (_("%P: %H: %s relocation references "
8576 "optimized away TOC entry\n"),
8577 ibfd, sec, rel->r_offset,
8578 ppc64_elf_howto_table[r_type]->name);
8579 bfd_set_error (bfd_error_bad_value);
8580 goto error_ret;
8581 }
8582 rel->r_addend = tocrel->r_addend;
8583 elf_section_data (sec)->relocs = relstart;
8584 continue;
8585 }
8586
8587 if (h != NULL || sym->st_value != 0)
8588 continue;
8589
8590 rel->r_addend -= skip[val >> 3];
8591 elf_section_data (sec)->relocs = relstart;
8592 }
8593
8594 if (elf_section_data (sec)->relocs != relstart)
8595 free (relstart);
8596 }
8597
8598 /* We shouldn't have local or global symbols defined in the TOC,
8599 but handle them anyway. */
8600 if (local_syms != NULL)
8601 for (sym = local_syms;
8602 sym < local_syms + symtab_hdr->sh_info;
8603 ++sym)
8604 if (sym->st_value != 0
8605 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8606 {
8607 unsigned long i;
8608
8609 if (sym->st_value > toc->rawsize)
8610 i = toc->rawsize >> 3;
8611 else
8612 i = sym->st_value >> 3;
8613
8614 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8615 {
8616 if (local_toc_syms)
8617 (*_bfd_error_handler)
8618 (_("%s defined on removed toc entry"),
8619 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8620 do
8621 ++i;
8622 while ((skip[i] & (ref_from_discarded | can_optimize)));
8623 sym->st_value = (bfd_vma) i << 3;
8624 }
8625
8626 sym->st_value -= skip[i];
8627 symtab_hdr->contents = (unsigned char *) local_syms;
8628 }
8629
8630 /* Adjust any global syms defined in this toc input section. */
8631 if (toc_inf.global_toc_syms)
8632 {
8633 toc_inf.toc = toc;
8634 toc_inf.skip = skip;
8635 toc_inf.global_toc_syms = FALSE;
8636 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8637 &toc_inf);
8638 }
8639
8640 if (toc->reloc_count != 0)
8641 {
8642 Elf_Internal_Shdr *rel_hdr;
8643 Elf_Internal_Rela *wrel;
8644 bfd_size_type sz;
8645
8646 /* Remove unused toc relocs, and adjust those we keep. */
8647 if (toc_relocs == NULL)
8648 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8649 info->keep_memory);
8650 if (toc_relocs == NULL)
8651 goto error_ret;
8652
8653 wrel = toc_relocs;
8654 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8655 if ((skip[rel->r_offset >> 3]
8656 & (ref_from_discarded | can_optimize)) == 0)
8657 {
8658 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8659 wrel->r_info = rel->r_info;
8660 wrel->r_addend = rel->r_addend;
8661 ++wrel;
8662 }
8663 else if (!dec_dynrel_count (rel->r_info, toc, info,
8664 &local_syms, NULL, NULL))
8665 goto error_ret;
8666
8667 elf_section_data (toc)->relocs = toc_relocs;
8668 toc->reloc_count = wrel - toc_relocs;
8669 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8670 sz = rel_hdr->sh_entsize;
8671 rel_hdr->sh_size = toc->reloc_count * sz;
8672 }
8673 }
8674 else if (toc_relocs != NULL
8675 && elf_section_data (toc)->relocs != toc_relocs)
8676 free (toc_relocs);
8677
8678 if (local_syms != NULL
8679 && symtab_hdr->contents != (unsigned char *) local_syms)
8680 {
8681 if (!info->keep_memory)
8682 free (local_syms);
8683 else
8684 symtab_hdr->contents = (unsigned char *) local_syms;
8685 }
8686 free (skip);
8687 }
8688
8689 return TRUE;
8690 }
8691
8692 /* Return true iff input section I references the TOC using
8693 instructions limited to +/-32k offsets. */
8694
8695 bfd_boolean
8696 ppc64_elf_has_small_toc_reloc (asection *i)
8697 {
8698 return (is_ppc64_elf (i->owner)
8699 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8700 }
8701
8702 /* Allocate space for one GOT entry. */
8703
8704 static void
8705 allocate_got (struct elf_link_hash_entry *h,
8706 struct bfd_link_info *info,
8707 struct got_entry *gent)
8708 {
8709 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8710 bfd_boolean dyn;
8711 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8712 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8713 ? 16 : 8);
8714 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8715 ? 2 : 1) * sizeof (Elf64_External_Rela);
8716 asection *got = ppc64_elf_tdata (gent->owner)->got;
8717
8718 gent->got.offset = got->size;
8719 got->size += entsize;
8720
8721 dyn = htab->elf.dynamic_sections_created;
8722 if ((info->shared
8723 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8724 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8725 || h->root.type != bfd_link_hash_undefweak))
8726 {
8727 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8728 relgot->size += rentsize;
8729 }
8730 else if (h->type == STT_GNU_IFUNC)
8731 {
8732 asection *relgot = htab->reliplt;
8733 relgot->size += rentsize;
8734 htab->got_reli_size += rentsize;
8735 }
8736 }
8737
8738 /* This function merges got entries in the same toc group. */
8739
8740 static void
8741 merge_got_entries (struct got_entry **pent)
8742 {
8743 struct got_entry *ent, *ent2;
8744
8745 for (ent = *pent; ent != NULL; ent = ent->next)
8746 if (!ent->is_indirect)
8747 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8748 if (!ent2->is_indirect
8749 && ent2->addend == ent->addend
8750 && ent2->tls_type == ent->tls_type
8751 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8752 {
8753 ent2->is_indirect = TRUE;
8754 ent2->got.ent = ent;
8755 }
8756 }
8757
8758 /* Allocate space in .plt, .got and associated reloc sections for
8759 dynamic relocs. */
8760
8761 static bfd_boolean
8762 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8763 {
8764 struct bfd_link_info *info;
8765 struct ppc_link_hash_table *htab;
8766 asection *s;
8767 struct ppc_link_hash_entry *eh;
8768 struct elf_dyn_relocs *p;
8769 struct got_entry **pgent, *gent;
8770
8771 if (h->root.type == bfd_link_hash_indirect)
8772 return TRUE;
8773
8774 info = (struct bfd_link_info *) inf;
8775 htab = ppc_hash_table (info);
8776 if (htab == NULL)
8777 return FALSE;
8778
8779 if ((htab->elf.dynamic_sections_created
8780 && h->dynindx != -1
8781 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8782 || h->type == STT_GNU_IFUNC)
8783 {
8784 struct plt_entry *pent;
8785 bfd_boolean doneone = FALSE;
8786 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8787 if (pent->plt.refcount > 0)
8788 {
8789 if (!htab->elf.dynamic_sections_created
8790 || h->dynindx == -1)
8791 {
8792 s = htab->iplt;
8793 pent->plt.offset = s->size;
8794 s->size += PLT_ENTRY_SIZE;
8795 s = htab->reliplt;
8796 }
8797 else
8798 {
8799 /* If this is the first .plt entry, make room for the special
8800 first entry. */
8801 s = htab->plt;
8802 if (s->size == 0)
8803 s->size += PLT_INITIAL_ENTRY_SIZE;
8804
8805 pent->plt.offset = s->size;
8806
8807 /* Make room for this entry. */
8808 s->size += PLT_ENTRY_SIZE;
8809
8810 /* Make room for the .glink code. */
8811 s = htab->glink;
8812 if (s->size == 0)
8813 s->size += GLINK_CALL_STUB_SIZE;
8814 /* We need bigger stubs past index 32767. */
8815 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8816 s->size += 4;
8817 s->size += 2*4;
8818
8819 /* We also need to make an entry in the .rela.plt section. */
8820 s = htab->relplt;
8821 }
8822 s->size += sizeof (Elf64_External_Rela);
8823 doneone = TRUE;
8824 }
8825 else
8826 pent->plt.offset = (bfd_vma) -1;
8827 if (!doneone)
8828 {
8829 h->plt.plist = NULL;
8830 h->needs_plt = 0;
8831 }
8832 }
8833 else
8834 {
8835 h->plt.plist = NULL;
8836 h->needs_plt = 0;
8837 }
8838
8839 eh = (struct ppc_link_hash_entry *) h;
8840 /* Run through the TLS GD got entries first if we're changing them
8841 to TPREL. */
8842 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8843 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8844 if (gent->got.refcount > 0
8845 && (gent->tls_type & TLS_GD) != 0)
8846 {
8847 /* This was a GD entry that has been converted to TPREL. If
8848 there happens to be a TPREL entry we can use that one. */
8849 struct got_entry *ent;
8850 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8851 if (ent->got.refcount > 0
8852 && (ent->tls_type & TLS_TPREL) != 0
8853 && ent->addend == gent->addend
8854 && ent->owner == gent->owner)
8855 {
8856 gent->got.refcount = 0;
8857 break;
8858 }
8859
8860 /* If not, then we'll be using our own TPREL entry. */
8861 if (gent->got.refcount != 0)
8862 gent->tls_type = TLS_TLS | TLS_TPREL;
8863 }
8864
8865 /* Remove any list entry that won't generate a word in the GOT before
8866 we call merge_got_entries. Otherwise we risk merging to empty
8867 entries. */
8868 pgent = &h->got.glist;
8869 while ((gent = *pgent) != NULL)
8870 if (gent->got.refcount > 0)
8871 {
8872 if ((gent->tls_type & TLS_LD) != 0
8873 && !h->def_dynamic)
8874 {
8875 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8876 *pgent = gent->next;
8877 }
8878 else
8879 pgent = &gent->next;
8880 }
8881 else
8882 *pgent = gent->next;
8883
8884 if (!htab->do_multi_toc)
8885 merge_got_entries (&h->got.glist);
8886
8887 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8888 if (!gent->is_indirect)
8889 {
8890 /* Make sure this symbol is output as a dynamic symbol.
8891 Undefined weak syms won't yet be marked as dynamic,
8892 nor will all TLS symbols. */
8893 if (h->dynindx == -1
8894 && !h->forced_local
8895 && h->type != STT_GNU_IFUNC
8896 && htab->elf.dynamic_sections_created)
8897 {
8898 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8899 return FALSE;
8900 }
8901
8902 if (!is_ppc64_elf (gent->owner))
8903 abort ();
8904
8905 allocate_got (h, info, gent);
8906 }
8907
8908 if (eh->dyn_relocs == NULL
8909 || (!htab->elf.dynamic_sections_created
8910 && h->type != STT_GNU_IFUNC))
8911 return TRUE;
8912
8913 /* In the shared -Bsymbolic case, discard space allocated for
8914 dynamic pc-relative relocs against symbols which turn out to be
8915 defined in regular objects. For the normal shared case, discard
8916 space for relocs that have become local due to symbol visibility
8917 changes. */
8918
8919 if (info->shared)
8920 {
8921 /* Relocs that use pc_count are those that appear on a call insn,
8922 or certain REL relocs (see must_be_dyn_reloc) that can be
8923 generated via assembly. We want calls to protected symbols to
8924 resolve directly to the function rather than going via the plt.
8925 If people want function pointer comparisons to work as expected
8926 then they should avoid writing weird assembly. */
8927 if (SYMBOL_CALLS_LOCAL (info, h))
8928 {
8929 struct elf_dyn_relocs **pp;
8930
8931 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8932 {
8933 p->count -= p->pc_count;
8934 p->pc_count = 0;
8935 if (p->count == 0)
8936 *pp = p->next;
8937 else
8938 pp = &p->next;
8939 }
8940 }
8941
8942 /* Also discard relocs on undefined weak syms with non-default
8943 visibility. */
8944 if (eh->dyn_relocs != NULL
8945 && h->root.type == bfd_link_hash_undefweak)
8946 {
8947 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8948 eh->dyn_relocs = NULL;
8949
8950 /* Make sure this symbol is output as a dynamic symbol.
8951 Undefined weak syms won't yet be marked as dynamic. */
8952 else if (h->dynindx == -1
8953 && !h->forced_local)
8954 {
8955 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8956 return FALSE;
8957 }
8958 }
8959 }
8960 else if (h->type == STT_GNU_IFUNC)
8961 {
8962 if (!h->non_got_ref)
8963 eh->dyn_relocs = NULL;
8964 }
8965 else if (ELIMINATE_COPY_RELOCS)
8966 {
8967 /* For the non-shared case, discard space for relocs against
8968 symbols which turn out to need copy relocs or are not
8969 dynamic. */
8970
8971 if (!h->non_got_ref
8972 && !h->def_regular)
8973 {
8974 /* Make sure this symbol is output as a dynamic symbol.
8975 Undefined weak syms won't yet be marked as dynamic. */
8976 if (h->dynindx == -1
8977 && !h->forced_local)
8978 {
8979 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8980 return FALSE;
8981 }
8982
8983 /* If that succeeded, we know we'll be keeping all the
8984 relocs. */
8985 if (h->dynindx != -1)
8986 goto keep;
8987 }
8988
8989 eh->dyn_relocs = NULL;
8990
8991 keep: ;
8992 }
8993
8994 /* Finally, allocate space. */
8995 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8996 {
8997 asection *sreloc = elf_section_data (p->sec)->sreloc;
8998 if (!htab->elf.dynamic_sections_created)
8999 sreloc = htab->reliplt;
9000 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9001 }
9002
9003 return TRUE;
9004 }
9005
9006 /* Find any dynamic relocs that apply to read-only sections. */
9007
9008 static bfd_boolean
9009 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9010 {
9011 struct ppc_link_hash_entry *eh;
9012 struct elf_dyn_relocs *p;
9013
9014 eh = (struct ppc_link_hash_entry *) h;
9015 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9016 {
9017 asection *s = p->sec->output_section;
9018
9019 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9020 {
9021 struct bfd_link_info *info = inf;
9022
9023 info->flags |= DF_TEXTREL;
9024
9025 /* Not an error, just cut short the traversal. */
9026 return FALSE;
9027 }
9028 }
9029 return TRUE;
9030 }
9031
9032 /* Set the sizes of the dynamic sections. */
9033
9034 static bfd_boolean
9035 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9036 struct bfd_link_info *info)
9037 {
9038 struct ppc_link_hash_table *htab;
9039 bfd *dynobj;
9040 asection *s;
9041 bfd_boolean relocs;
9042 bfd *ibfd;
9043 struct got_entry *first_tlsld;
9044
9045 htab = ppc_hash_table (info);
9046 if (htab == NULL)
9047 return FALSE;
9048
9049 dynobj = htab->elf.dynobj;
9050 if (dynobj == NULL)
9051 abort ();
9052
9053 if (htab->elf.dynamic_sections_created)
9054 {
9055 /* Set the contents of the .interp section to the interpreter. */
9056 if (info->executable)
9057 {
9058 s = bfd_get_section_by_name (dynobj, ".interp");
9059 if (s == NULL)
9060 abort ();
9061 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9062 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9063 }
9064 }
9065
9066 /* Set up .got offsets for local syms, and space for local dynamic
9067 relocs. */
9068 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9069 {
9070 struct got_entry **lgot_ents;
9071 struct got_entry **end_lgot_ents;
9072 struct plt_entry **local_plt;
9073 struct plt_entry **end_local_plt;
9074 unsigned char *lgot_masks;
9075 bfd_size_type locsymcount;
9076 Elf_Internal_Shdr *symtab_hdr;
9077 asection *srel;
9078
9079 if (!is_ppc64_elf (ibfd))
9080 continue;
9081
9082 for (s = ibfd->sections; s != NULL; s = s->next)
9083 {
9084 struct elf_dyn_relocs *p;
9085
9086 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9087 {
9088 if (!bfd_is_abs_section (p->sec)
9089 && bfd_is_abs_section (p->sec->output_section))
9090 {
9091 /* Input section has been discarded, either because
9092 it is a copy of a linkonce section or due to
9093 linker script /DISCARD/, so we'll be discarding
9094 the relocs too. */
9095 }
9096 else if (p->count != 0)
9097 {
9098 srel = elf_section_data (p->sec)->sreloc;
9099 if (!htab->elf.dynamic_sections_created)
9100 srel = htab->reliplt;
9101 srel->size += p->count * sizeof (Elf64_External_Rela);
9102 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9103 info->flags |= DF_TEXTREL;
9104 }
9105 }
9106 }
9107
9108 lgot_ents = elf_local_got_ents (ibfd);
9109 if (!lgot_ents)
9110 continue;
9111
9112 symtab_hdr = &elf_symtab_hdr (ibfd);
9113 locsymcount = symtab_hdr->sh_info;
9114 end_lgot_ents = lgot_ents + locsymcount;
9115 local_plt = (struct plt_entry **) end_lgot_ents;
9116 end_local_plt = local_plt + locsymcount;
9117 lgot_masks = (unsigned char *) end_local_plt;
9118 s = ppc64_elf_tdata (ibfd)->got;
9119 srel = ppc64_elf_tdata (ibfd)->relgot;
9120 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9121 {
9122 struct got_entry **pent, *ent;
9123
9124 pent = lgot_ents;
9125 while ((ent = *pent) != NULL)
9126 if (ent->got.refcount > 0)
9127 {
9128 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9129 {
9130 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9131 *pent = ent->next;
9132 }
9133 else
9134 {
9135 unsigned int num = 1;
9136 ent->got.offset = s->size;
9137 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9138 num = 2;
9139 s->size += num * 8;
9140 if (info->shared)
9141 srel->size += num * sizeof (Elf64_External_Rela);
9142 else if ((*lgot_masks & PLT_IFUNC) != 0)
9143 {
9144 htab->reliplt->size
9145 += num * sizeof (Elf64_External_Rela);
9146 htab->got_reli_size
9147 += num * sizeof (Elf64_External_Rela);
9148 }
9149 pent = &ent->next;
9150 }
9151 }
9152 else
9153 *pent = ent->next;
9154 }
9155
9156 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9157 for (; local_plt < end_local_plt; ++local_plt)
9158 {
9159 struct plt_entry *ent;
9160
9161 for (ent = *local_plt; ent != NULL; ent = ent->next)
9162 if (ent->plt.refcount > 0)
9163 {
9164 s = htab->iplt;
9165 ent->plt.offset = s->size;
9166 s->size += PLT_ENTRY_SIZE;
9167
9168 htab->reliplt->size += sizeof (Elf64_External_Rela);
9169 }
9170 else
9171 ent->plt.offset = (bfd_vma) -1;
9172 }
9173 }
9174
9175 /* Allocate global sym .plt and .got entries, and space for global
9176 sym dynamic relocs. */
9177 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9178
9179 first_tlsld = NULL;
9180 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9181 {
9182 struct got_entry *ent;
9183
9184 if (!is_ppc64_elf (ibfd))
9185 continue;
9186
9187 ent = ppc64_tlsld_got (ibfd);
9188 if (ent->got.refcount > 0)
9189 {
9190 if (!htab->do_multi_toc && first_tlsld != NULL)
9191 {
9192 ent->is_indirect = TRUE;
9193 ent->got.ent = first_tlsld;
9194 }
9195 else
9196 {
9197 if (first_tlsld == NULL)
9198 first_tlsld = ent;
9199 s = ppc64_elf_tdata (ibfd)->got;
9200 ent->got.offset = s->size;
9201 ent->owner = ibfd;
9202 s->size += 16;
9203 if (info->shared)
9204 {
9205 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9206 srel->size += sizeof (Elf64_External_Rela);
9207 }
9208 }
9209 }
9210 else
9211 ent->got.offset = (bfd_vma) -1;
9212 }
9213
9214 /* We now have determined the sizes of the various dynamic sections.
9215 Allocate memory for them. */
9216 relocs = FALSE;
9217 for (s = dynobj->sections; s != NULL; s = s->next)
9218 {
9219 if ((s->flags & SEC_LINKER_CREATED) == 0)
9220 continue;
9221
9222 if (s == htab->brlt || s == htab->relbrlt)
9223 /* These haven't been allocated yet; don't strip. */
9224 continue;
9225 else if (s == htab->got
9226 || s == htab->plt
9227 || s == htab->iplt
9228 || s == htab->glink
9229 || s == htab->dynbss)
9230 {
9231 /* Strip this section if we don't need it; see the
9232 comment below. */
9233 }
9234 else if (s == htab->glink_eh_frame)
9235 {
9236 if (!bfd_is_abs_section (s->output_section))
9237 /* Not sized yet. */
9238 continue;
9239 }
9240 else if (CONST_STRNEQ (s->name, ".rela"))
9241 {
9242 if (s->size != 0)
9243 {
9244 if (s != htab->relplt)
9245 relocs = TRUE;
9246
9247 /* We use the reloc_count field as a counter if we need
9248 to copy relocs into the output file. */
9249 s->reloc_count = 0;
9250 }
9251 }
9252 else
9253 {
9254 /* It's not one of our sections, so don't allocate space. */
9255 continue;
9256 }
9257
9258 if (s->size == 0)
9259 {
9260 /* If we don't need this section, strip it from the
9261 output file. This is mostly to handle .rela.bss and
9262 .rela.plt. We must create both sections in
9263 create_dynamic_sections, because they must be created
9264 before the linker maps input sections to output
9265 sections. The linker does that before
9266 adjust_dynamic_symbol is called, and it is that
9267 function which decides whether anything needs to go
9268 into these sections. */
9269 s->flags |= SEC_EXCLUDE;
9270 continue;
9271 }
9272
9273 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9274 continue;
9275
9276 /* Allocate memory for the section contents. We use bfd_zalloc
9277 here in case unused entries are not reclaimed before the
9278 section's contents are written out. This should not happen,
9279 but this way if it does we get a R_PPC64_NONE reloc in .rela
9280 sections instead of garbage.
9281 We also rely on the section contents being zero when writing
9282 the GOT. */
9283 s->contents = bfd_zalloc (dynobj, s->size);
9284 if (s->contents == NULL)
9285 return FALSE;
9286 }
9287
9288 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9289 {
9290 if (!is_ppc64_elf (ibfd))
9291 continue;
9292
9293 s = ppc64_elf_tdata (ibfd)->got;
9294 if (s != NULL && s != htab->got)
9295 {
9296 if (s->size == 0)
9297 s->flags |= SEC_EXCLUDE;
9298 else
9299 {
9300 s->contents = bfd_zalloc (ibfd, s->size);
9301 if (s->contents == NULL)
9302 return FALSE;
9303 }
9304 }
9305 s = ppc64_elf_tdata (ibfd)->relgot;
9306 if (s != NULL)
9307 {
9308 if (s->size == 0)
9309 s->flags |= SEC_EXCLUDE;
9310 else
9311 {
9312 s->contents = bfd_zalloc (ibfd, s->size);
9313 if (s->contents == NULL)
9314 return FALSE;
9315 relocs = TRUE;
9316 s->reloc_count = 0;
9317 }
9318 }
9319 }
9320
9321 if (htab->elf.dynamic_sections_created)
9322 {
9323 /* Add some entries to the .dynamic section. We fill in the
9324 values later, in ppc64_elf_finish_dynamic_sections, but we
9325 must add the entries now so that we get the correct size for
9326 the .dynamic section. The DT_DEBUG entry is filled in by the
9327 dynamic linker and used by the debugger. */
9328 #define add_dynamic_entry(TAG, VAL) \
9329 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9330
9331 if (info->executable)
9332 {
9333 if (!add_dynamic_entry (DT_DEBUG, 0))
9334 return FALSE;
9335 }
9336
9337 if (htab->plt != NULL && htab->plt->size != 0)
9338 {
9339 if (!add_dynamic_entry (DT_PLTGOT, 0)
9340 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9341 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9342 || !add_dynamic_entry (DT_JMPREL, 0)
9343 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9344 return FALSE;
9345 }
9346
9347 if (NO_OPD_RELOCS)
9348 {
9349 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9350 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9351 return FALSE;
9352 }
9353
9354 if (!htab->no_tls_get_addr_opt
9355 && htab->tls_get_addr_fd != NULL
9356 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9357 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9358 return FALSE;
9359
9360 if (relocs)
9361 {
9362 if (!add_dynamic_entry (DT_RELA, 0)
9363 || !add_dynamic_entry (DT_RELASZ, 0)
9364 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9365 return FALSE;
9366
9367 /* If any dynamic relocs apply to a read-only section,
9368 then we need a DT_TEXTREL entry. */
9369 if ((info->flags & DF_TEXTREL) == 0)
9370 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9371
9372 if ((info->flags & DF_TEXTREL) != 0)
9373 {
9374 if (!add_dynamic_entry (DT_TEXTREL, 0))
9375 return FALSE;
9376 }
9377 }
9378 }
9379 #undef add_dynamic_entry
9380
9381 return TRUE;
9382 }
9383
9384 /* Determine the type of stub needed, if any, for a call. */
9385
9386 static inline enum ppc_stub_type
9387 ppc_type_of_stub (asection *input_sec,
9388 const Elf_Internal_Rela *rel,
9389 struct ppc_link_hash_entry **hash,
9390 struct plt_entry **plt_ent,
9391 bfd_vma destination)
9392 {
9393 struct ppc_link_hash_entry *h = *hash;
9394 bfd_vma location;
9395 bfd_vma branch_offset;
9396 bfd_vma max_branch_offset;
9397 enum elf_ppc64_reloc_type r_type;
9398
9399 if (h != NULL)
9400 {
9401 struct plt_entry *ent;
9402 struct ppc_link_hash_entry *fdh = h;
9403 if (h->oh != NULL
9404 && h->oh->is_func_descriptor)
9405 {
9406 fdh = ppc_follow_link (h->oh);
9407 *hash = fdh;
9408 }
9409
9410 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9411 if (ent->addend == rel->r_addend
9412 && ent->plt.offset != (bfd_vma) -1)
9413 {
9414 *plt_ent = ent;
9415 return ppc_stub_plt_call;
9416 }
9417
9418 /* Here, we know we don't have a plt entry. If we don't have a
9419 either a defined function descriptor or a defined entry symbol
9420 in a regular object file, then it is pointless trying to make
9421 any other type of stub. */
9422 if (!is_static_defined (&fdh->elf)
9423 && !is_static_defined (&h->elf))
9424 return ppc_stub_none;
9425 }
9426 else if (elf_local_got_ents (input_sec->owner) != NULL)
9427 {
9428 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9429 struct plt_entry **local_plt = (struct plt_entry **)
9430 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9431 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9432
9433 if (local_plt[r_symndx] != NULL)
9434 {
9435 struct plt_entry *ent;
9436
9437 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9438 if (ent->addend == rel->r_addend
9439 && ent->plt.offset != (bfd_vma) -1)
9440 {
9441 *plt_ent = ent;
9442 return ppc_stub_plt_call;
9443 }
9444 }
9445 }
9446
9447 /* Determine where the call point is. */
9448 location = (input_sec->output_offset
9449 + input_sec->output_section->vma
9450 + rel->r_offset);
9451
9452 branch_offset = destination - location;
9453 r_type = ELF64_R_TYPE (rel->r_info);
9454
9455 /* Determine if a long branch stub is needed. */
9456 max_branch_offset = 1 << 25;
9457 if (r_type != R_PPC64_REL24)
9458 max_branch_offset = 1 << 15;
9459
9460 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9461 /* We need a stub. Figure out whether a long_branch or plt_branch
9462 is needed later. */
9463 return ppc_stub_long_branch;
9464
9465 return ppc_stub_none;
9466 }
9467
9468 /* Build a .plt call stub. */
9469
9470 static inline bfd_byte *
9471 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r,
9472 bfd_boolean plt_static_chain)
9473 {
9474 #define PPC_LO(v) ((v) & 0xffff)
9475 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9476 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9477
9478 if (PPC_HA (offset) != 0)
9479 {
9480 if (r != NULL)
9481 {
9482 r[0].r_offset += 4;
9483 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9484 r[1].r_offset = r[0].r_offset + 4;
9485 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9486 r[1].r_addend = r[0].r_addend;
9487 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9488 {
9489 r[2].r_offset = r[1].r_offset + 4;
9490 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9491 r[2].r_addend = r[0].r_addend;
9492 }
9493 else
9494 {
9495 r[2].r_offset = r[1].r_offset + 8;
9496 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9497 r[2].r_addend = r[0].r_addend + 8;
9498 if (plt_static_chain)
9499 {
9500 r[3].r_offset = r[2].r_offset + 4;
9501 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9502 r[3].r_addend = r[0].r_addend + 16;
9503 }
9504 }
9505 }
9506 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9507 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9508 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9509 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9510 {
9511 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9512 offset = 0;
9513 }
9514 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9515 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9516 if (plt_static_chain)
9517 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9518 bfd_put_32 (obfd, BCTR, p), p += 4;
9519 }
9520 else
9521 {
9522 if (r != NULL)
9523 {
9524 r[0].r_offset += 4;
9525 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9526 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9527 {
9528 r[1].r_offset = r[0].r_offset + 4;
9529 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9530 r[1].r_addend = r[0].r_addend;
9531 }
9532 else
9533 {
9534 r[1].r_offset = r[0].r_offset + 8;
9535 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9536 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9537 if (plt_static_chain)
9538 {
9539 r[2].r_offset = r[1].r_offset + 4;
9540 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9541 r[2].r_addend = r[0].r_addend + 8;
9542 }
9543 }
9544 }
9545 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9546 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9547 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9548 {
9549 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9550 offset = 0;
9551 }
9552 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9553 if (plt_static_chain)
9554 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9555 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9556 bfd_put_32 (obfd, BCTR, p), p += 4;
9557 }
9558 return p;
9559 }
9560
9561 /* Build a special .plt call stub for __tls_get_addr. */
9562
9563 #define LD_R11_0R3 0xe9630000
9564 #define LD_R12_0R3 0xe9830000
9565 #define MR_R0_R3 0x7c601b78
9566 #define CMPDI_R11_0 0x2c2b0000
9567 #define ADD_R3_R12_R13 0x7c6c6a14
9568 #define BEQLR 0x4d820020
9569 #define MR_R3_R0 0x7c030378
9570 #define MFLR_R11 0x7d6802a6
9571 #define STD_R11_0R1 0xf9610000
9572 #define BCTRL 0x4e800421
9573 #define LD_R11_0R1 0xe9610000
9574 #define LD_R2_0R1 0xe8410000
9575 #define MTLR_R11 0x7d6803a6
9576
9577 static inline bfd_byte *
9578 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9579 Elf_Internal_Rela *r, bfd_boolean plt_static_chain)
9580 {
9581 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9582 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9583 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9584 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9585 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9586 bfd_put_32 (obfd, BEQLR, p), p += 4;
9587 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9588 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9589 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9590
9591 if (r != NULL)
9592 r[0].r_offset += 9 * 4;
9593 p = build_plt_stub (obfd, p, offset, r, plt_static_chain);
9594 bfd_put_32 (obfd, BCTRL, p - 4);
9595
9596 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9597 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9598 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9599 bfd_put_32 (obfd, BLR, p), p += 4;
9600
9601 return p;
9602 }
9603
9604 static Elf_Internal_Rela *
9605 get_relocs (asection *sec, int count)
9606 {
9607 Elf_Internal_Rela *relocs;
9608 struct bfd_elf_section_data *elfsec_data;
9609
9610 elfsec_data = elf_section_data (sec);
9611 relocs = elfsec_data->relocs;
9612 if (relocs == NULL)
9613 {
9614 bfd_size_type relsize;
9615 relsize = sec->reloc_count * sizeof (*relocs);
9616 relocs = bfd_alloc (sec->owner, relsize);
9617 if (relocs == NULL)
9618 return NULL;
9619 elfsec_data->relocs = relocs;
9620 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9621 sizeof (Elf_Internal_Shdr));
9622 if (elfsec_data->rela.hdr == NULL)
9623 return NULL;
9624 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9625 * sizeof (Elf64_External_Rela));
9626 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9627 sec->reloc_count = 0;
9628 }
9629 relocs += sec->reloc_count;
9630 sec->reloc_count += count;
9631 return relocs;
9632 }
9633
9634 static bfd_vma
9635 get_r2off (struct bfd_link_info *info,
9636 struct ppc_stub_hash_entry *stub_entry)
9637 {
9638 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9639 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9640
9641 if (r2off == 0)
9642 {
9643 /* Support linking -R objects. Get the toc pointer from the
9644 opd entry. */
9645 char buf[8];
9646 asection *opd = stub_entry->h->elf.root.u.def.section;
9647 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9648
9649 if (strcmp (opd->name, ".opd") != 0
9650 || opd->reloc_count != 0)
9651 {
9652 info->callbacks->einfo (_("%P: cannot find opd entry toc for %s\n"),
9653 stub_entry->h->elf.root.root.string);
9654 bfd_set_error (bfd_error_bad_value);
9655 return 0;
9656 }
9657 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9658 return 0;
9659 r2off = bfd_get_64 (opd->owner, buf);
9660 r2off -= elf_gp (info->output_bfd);
9661 }
9662 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9663 return r2off;
9664 }
9665
9666 static bfd_boolean
9667 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9668 {
9669 struct ppc_stub_hash_entry *stub_entry;
9670 struct ppc_branch_hash_entry *br_entry;
9671 struct bfd_link_info *info;
9672 struct ppc_link_hash_table *htab;
9673 bfd_byte *loc;
9674 bfd_byte *p;
9675 bfd_vma dest, off;
9676 int size;
9677 Elf_Internal_Rela *r;
9678 asection *plt;
9679
9680 /* Massage our args to the form they really have. */
9681 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9682 info = in_arg;
9683
9684 htab = ppc_hash_table (info);
9685 if (htab == NULL)
9686 return FALSE;
9687
9688 /* Make a note of the offset within the stubs for this entry. */
9689 stub_entry->stub_offset = stub_entry->stub_sec->size;
9690 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9691
9692 htab->stub_count[stub_entry->stub_type - 1] += 1;
9693 switch (stub_entry->stub_type)
9694 {
9695 case ppc_stub_long_branch:
9696 case ppc_stub_long_branch_r2off:
9697 /* Branches are relative. This is where we are going to. */
9698 off = dest = (stub_entry->target_value
9699 + stub_entry->target_section->output_offset
9700 + stub_entry->target_section->output_section->vma);
9701
9702 /* And this is where we are coming from. */
9703 off -= (stub_entry->stub_offset
9704 + stub_entry->stub_sec->output_offset
9705 + stub_entry->stub_sec->output_section->vma);
9706
9707 size = 4;
9708 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9709 {
9710 bfd_vma r2off = get_r2off (info, stub_entry);
9711
9712 if (r2off == 0)
9713 {
9714 htab->stub_error = TRUE;
9715 return FALSE;
9716 }
9717 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9718 loc += 4;
9719 size = 12;
9720 if (PPC_HA (r2off) != 0)
9721 {
9722 size = 16;
9723 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9724 loc += 4;
9725 }
9726 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9727 loc += 4;
9728 off -= size - 4;
9729 }
9730 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9731
9732 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9733 {
9734 info->callbacks->einfo (_("%P: long branch stub `%s' offset overflow\n"),
9735 stub_entry->root.string);
9736 htab->stub_error = TRUE;
9737 return FALSE;
9738 }
9739
9740 if (info->emitrelocations)
9741 {
9742 r = get_relocs (stub_entry->stub_sec, 1);
9743 if (r == NULL)
9744 return FALSE;
9745 r->r_offset = loc - stub_entry->stub_sec->contents;
9746 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9747 r->r_addend = dest;
9748 if (stub_entry->h != NULL)
9749 {
9750 struct elf_link_hash_entry **hashes;
9751 unsigned long symndx;
9752 struct ppc_link_hash_entry *h;
9753
9754 hashes = elf_sym_hashes (htab->stub_bfd);
9755 if (hashes == NULL)
9756 {
9757 bfd_size_type hsize;
9758
9759 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9760 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9761 if (hashes == NULL)
9762 return FALSE;
9763 elf_sym_hashes (htab->stub_bfd) = hashes;
9764 htab->stub_globals = 1;
9765 }
9766 symndx = htab->stub_globals++;
9767 h = stub_entry->h;
9768 hashes[symndx] = &h->elf;
9769 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9770 if (h->oh != NULL && h->oh->is_func)
9771 h = ppc_follow_link (h->oh);
9772 if (h->elf.root.u.def.section != stub_entry->target_section)
9773 /* H is an opd symbol. The addend must be zero. */
9774 r->r_addend = 0;
9775 else
9776 {
9777 off = (h->elf.root.u.def.value
9778 + h->elf.root.u.def.section->output_offset
9779 + h->elf.root.u.def.section->output_section->vma);
9780 r->r_addend -= off;
9781 }
9782 }
9783 }
9784 break;
9785
9786 case ppc_stub_plt_branch:
9787 case ppc_stub_plt_branch_r2off:
9788 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9789 stub_entry->root.string + 9,
9790 FALSE, FALSE);
9791 if (br_entry == NULL)
9792 {
9793 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
9794 stub_entry->root.string);
9795 htab->stub_error = TRUE;
9796 return FALSE;
9797 }
9798
9799 dest = (stub_entry->target_value
9800 + stub_entry->target_section->output_offset
9801 + stub_entry->target_section->output_section->vma);
9802
9803 bfd_put_64 (htab->brlt->owner, dest,
9804 htab->brlt->contents + br_entry->offset);
9805
9806 if (br_entry->iter == htab->stub_iteration)
9807 {
9808 br_entry->iter = 0;
9809
9810 if (htab->relbrlt != NULL)
9811 {
9812 /* Create a reloc for the branch lookup table entry. */
9813 Elf_Internal_Rela rela;
9814 bfd_byte *rl;
9815
9816 rela.r_offset = (br_entry->offset
9817 + htab->brlt->output_offset
9818 + htab->brlt->output_section->vma);
9819 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9820 rela.r_addend = dest;
9821
9822 rl = htab->relbrlt->contents;
9823 rl += (htab->relbrlt->reloc_count++
9824 * sizeof (Elf64_External_Rela));
9825 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9826 }
9827 else if (info->emitrelocations)
9828 {
9829 r = get_relocs (htab->brlt, 1);
9830 if (r == NULL)
9831 return FALSE;
9832 /* brlt, being SEC_LINKER_CREATED does not go through the
9833 normal reloc processing. Symbols and offsets are not
9834 translated from input file to output file form, so
9835 set up the offset per the output file. */
9836 r->r_offset = (br_entry->offset
9837 + htab->brlt->output_offset
9838 + htab->brlt->output_section->vma);
9839 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9840 r->r_addend = dest;
9841 }
9842 }
9843
9844 dest = (br_entry->offset
9845 + htab->brlt->output_offset
9846 + htab->brlt->output_section->vma);
9847
9848 off = (dest
9849 - elf_gp (htab->brlt->output_section->owner)
9850 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9851
9852 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9853 {
9854 info->callbacks->einfo
9855 (_("%P: linkage table error against `%s'\n"),
9856 stub_entry->root.string);
9857 bfd_set_error (bfd_error_bad_value);
9858 htab->stub_error = TRUE;
9859 return FALSE;
9860 }
9861
9862 if (info->emitrelocations)
9863 {
9864 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9865 if (r == NULL)
9866 return FALSE;
9867 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9868 if (bfd_big_endian (info->output_bfd))
9869 r[0].r_offset += 2;
9870 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9871 r[0].r_offset += 4;
9872 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9873 r[0].r_addend = dest;
9874 if (PPC_HA (off) != 0)
9875 {
9876 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9877 r[1].r_offset = r[0].r_offset + 4;
9878 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9879 r[1].r_addend = r[0].r_addend;
9880 }
9881 }
9882
9883 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9884 {
9885 if (PPC_HA (off) != 0)
9886 {
9887 size = 16;
9888 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9889 loc += 4;
9890 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9891 }
9892 else
9893 {
9894 size = 12;
9895 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9896 }
9897 }
9898 else
9899 {
9900 bfd_vma r2off = get_r2off (info, stub_entry);
9901
9902 if (r2off == 0)
9903 {
9904 htab->stub_error = TRUE;
9905 return FALSE;
9906 }
9907
9908 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9909 loc += 4;
9910 size = 20;
9911 if (PPC_HA (off) != 0)
9912 {
9913 size += 4;
9914 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9915 loc += 4;
9916 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9917 loc += 4;
9918 }
9919 else
9920 {
9921 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9922 loc += 4;
9923 }
9924
9925 if (PPC_HA (r2off) != 0)
9926 {
9927 size += 4;
9928 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9929 loc += 4;
9930 }
9931 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9932 }
9933 loc += 4;
9934 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9935 loc += 4;
9936 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9937 break;
9938
9939 case ppc_stub_plt_call:
9940 if (stub_entry->h != NULL
9941 && stub_entry->h->is_func_descriptor
9942 && stub_entry->h->oh != NULL)
9943 {
9944 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9945
9946 /* If the old-ABI "dot-symbol" is undefined make it weak so
9947 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9948 FIXME: We used to define the symbol on one of the call
9949 stubs instead, which is why we test symbol section id
9950 against htab->top_id in various places. Likely all
9951 these checks could now disappear. */
9952 if (fh->elf.root.type == bfd_link_hash_undefined)
9953 fh->elf.root.type = bfd_link_hash_undefweak;
9954 /* Stop undo_symbol_twiddle changing it back to undefined. */
9955 fh->was_undefined = 0;
9956 }
9957
9958 /* Now build the stub. */
9959 dest = stub_entry->plt_ent->plt.offset & ~1;
9960 if (dest >= (bfd_vma) -2)
9961 abort ();
9962
9963 plt = htab->plt;
9964 if (!htab->elf.dynamic_sections_created
9965 || stub_entry->h == NULL
9966 || stub_entry->h->elf.dynindx == -1)
9967 plt = htab->iplt;
9968
9969 dest += plt->output_offset + plt->output_section->vma;
9970
9971 if (stub_entry->h == NULL
9972 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9973 {
9974 Elf_Internal_Rela rela;
9975 bfd_byte *rl;
9976
9977 rela.r_offset = dest;
9978 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9979 rela.r_addend = (stub_entry->target_value
9980 + stub_entry->target_section->output_offset
9981 + stub_entry->target_section->output_section->vma);
9982
9983 rl = (htab->reliplt->contents
9984 + (htab->reliplt->reloc_count++
9985 * sizeof (Elf64_External_Rela)));
9986 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9987 stub_entry->plt_ent->plt.offset |= 1;
9988 }
9989
9990 off = (dest
9991 - elf_gp (plt->output_section->owner)
9992 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9993
9994 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9995 {
9996 info->callbacks->einfo
9997 (_("%P: linkage table error against `%s'\n"),
9998 stub_entry->h != NULL
9999 ? stub_entry->h->elf.root.root.string
10000 : "<local sym>");
10001 bfd_set_error (bfd_error_bad_value);
10002 htab->stub_error = TRUE;
10003 return FALSE;
10004 }
10005
10006 r = NULL;
10007 if (info->emitrelocations)
10008 {
10009 r = get_relocs (stub_entry->stub_sec,
10010 (2
10011 + (PPC_HA (off) != 0)
10012 + (htab->plt_static_chain
10013 && PPC_HA (off + 16) == PPC_HA (off))));
10014 if (r == NULL)
10015 return FALSE;
10016 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10017 if (bfd_big_endian (info->output_bfd))
10018 r[0].r_offset += 2;
10019 r[0].r_addend = dest;
10020 }
10021 if (stub_entry->h != NULL
10022 && (stub_entry->h == htab->tls_get_addr_fd
10023 || stub_entry->h == htab->tls_get_addr)
10024 && !htab->no_tls_get_addr_opt)
10025 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r,
10026 htab->plt_static_chain);
10027 else
10028 p = build_plt_stub (htab->stub_bfd, loc, off, r,
10029 htab->plt_static_chain);
10030 size = p - loc;
10031 break;
10032
10033 default:
10034 BFD_FAIL ();
10035 return FALSE;
10036 }
10037
10038 stub_entry->stub_sec->size += size;
10039
10040 if (htab->emit_stub_syms)
10041 {
10042 struct elf_link_hash_entry *h;
10043 size_t len1, len2;
10044 char *name;
10045 const char *const stub_str[] = { "long_branch",
10046 "long_branch_r2off",
10047 "plt_branch",
10048 "plt_branch_r2off",
10049 "plt_call" };
10050
10051 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10052 len2 = strlen (stub_entry->root.string);
10053 name = bfd_malloc (len1 + len2 + 2);
10054 if (name == NULL)
10055 return FALSE;
10056 memcpy (name, stub_entry->root.string, 9);
10057 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10058 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10059 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10060 if (h == NULL)
10061 return FALSE;
10062 if (h->root.type == bfd_link_hash_new)
10063 {
10064 h->root.type = bfd_link_hash_defined;
10065 h->root.u.def.section = stub_entry->stub_sec;
10066 h->root.u.def.value = stub_entry->stub_offset;
10067 h->ref_regular = 1;
10068 h->def_regular = 1;
10069 h->ref_regular_nonweak = 1;
10070 h->forced_local = 1;
10071 h->non_elf = 0;
10072 }
10073 }
10074
10075 return TRUE;
10076 }
10077
10078 /* As above, but don't actually build the stub. Just bump offset so
10079 we know stub section sizes, and select plt_branch stubs where
10080 long_branch stubs won't do. */
10081
10082 static bfd_boolean
10083 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10084 {
10085 struct ppc_stub_hash_entry *stub_entry;
10086 struct bfd_link_info *info;
10087 struct ppc_link_hash_table *htab;
10088 bfd_vma off;
10089 int size;
10090
10091 /* Massage our args to the form they really have. */
10092 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10093 info = in_arg;
10094
10095 htab = ppc_hash_table (info);
10096 if (htab == NULL)
10097 return FALSE;
10098
10099 if (stub_entry->stub_type == ppc_stub_plt_call)
10100 {
10101 asection *plt;
10102 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10103 if (off >= (bfd_vma) -2)
10104 abort ();
10105 plt = htab->plt;
10106 if (!htab->elf.dynamic_sections_created
10107 || stub_entry->h == NULL
10108 || stub_entry->h->elf.dynindx == -1)
10109 plt = htab->iplt;
10110 off += (plt->output_offset
10111 + plt->output_section->vma
10112 - elf_gp (plt->output_section->owner)
10113 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10114
10115 size = PLT_CALL_STUB_SIZE;
10116 if (!htab->plt_static_chain)
10117 size -= 4;
10118 if (PPC_HA (off) == 0)
10119 size -= 4;
10120 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
10121 size += 4;
10122 if (stub_entry->h != NULL
10123 && (stub_entry->h == htab->tls_get_addr_fd
10124 || stub_entry->h == htab->tls_get_addr)
10125 && !htab->no_tls_get_addr_opt)
10126 size += 13 * 4;
10127 if (info->emitrelocations)
10128 {
10129 stub_entry->stub_sec->reloc_count
10130 += (2
10131 + (PPC_HA (off) != 0)
10132 + (htab->plt_static_chain
10133 && PPC_HA (off + 16) == PPC_HA (off)));
10134 stub_entry->stub_sec->flags |= SEC_RELOC;
10135 }
10136 }
10137 else
10138 {
10139 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10140 variants. */
10141 bfd_vma r2off = 0;
10142
10143 off = (stub_entry->target_value
10144 + stub_entry->target_section->output_offset
10145 + stub_entry->target_section->output_section->vma);
10146 off -= (stub_entry->stub_sec->size
10147 + stub_entry->stub_sec->output_offset
10148 + stub_entry->stub_sec->output_section->vma);
10149
10150 /* Reset the stub type from the plt variant in case we now
10151 can reach with a shorter stub. */
10152 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10153 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10154
10155 size = 4;
10156 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10157 {
10158 r2off = get_r2off (info, stub_entry);
10159 if (r2off == 0)
10160 {
10161 htab->stub_error = TRUE;
10162 return FALSE;
10163 }
10164 size = 12;
10165 if (PPC_HA (r2off) != 0)
10166 size = 16;
10167 off -= size - 4;
10168 }
10169
10170 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10171 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10172 {
10173 struct ppc_branch_hash_entry *br_entry;
10174
10175 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10176 stub_entry->root.string + 9,
10177 TRUE, FALSE);
10178 if (br_entry == NULL)
10179 {
10180 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10181 stub_entry->root.string);
10182 htab->stub_error = TRUE;
10183 return FALSE;
10184 }
10185
10186 if (br_entry->iter != htab->stub_iteration)
10187 {
10188 br_entry->iter = htab->stub_iteration;
10189 br_entry->offset = htab->brlt->size;
10190 htab->brlt->size += 8;
10191
10192 if (htab->relbrlt != NULL)
10193 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10194 else if (info->emitrelocations)
10195 {
10196 htab->brlt->reloc_count += 1;
10197 htab->brlt->flags |= SEC_RELOC;
10198 }
10199 }
10200
10201 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10202 off = (br_entry->offset
10203 + htab->brlt->output_offset
10204 + htab->brlt->output_section->vma
10205 - elf_gp (htab->brlt->output_section->owner)
10206 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10207
10208 if (info->emitrelocations)
10209 {
10210 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10211 stub_entry->stub_sec->flags |= SEC_RELOC;
10212 }
10213
10214 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10215 {
10216 size = 12;
10217 if (PPC_HA (off) != 0)
10218 size = 16;
10219 }
10220 else
10221 {
10222 size = 20;
10223 if (PPC_HA (off) != 0)
10224 size += 4;
10225
10226 if (PPC_HA (r2off) != 0)
10227 size += 4;
10228 }
10229 }
10230 else if (info->emitrelocations)
10231 {
10232 stub_entry->stub_sec->reloc_count += 1;
10233 stub_entry->stub_sec->flags |= SEC_RELOC;
10234 }
10235 }
10236
10237 stub_entry->stub_sec->size += size;
10238 return TRUE;
10239 }
10240
10241 /* Set up various things so that we can make a list of input sections
10242 for each output section included in the link. Returns -1 on error,
10243 0 when no stubs will be needed, and 1 on success. */
10244
10245 int
10246 ppc64_elf_setup_section_lists
10247 (struct bfd_link_info *info,
10248 asection *(*add_stub_section) (const char *, asection *),
10249 void (*layout_sections_again) (void))
10250 {
10251 bfd *input_bfd;
10252 int top_id, top_index, id;
10253 asection *section;
10254 asection **input_list;
10255 bfd_size_type amt;
10256 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10257
10258 if (htab == NULL)
10259 return -1;
10260 /* Stash our params away. */
10261 htab->add_stub_section = add_stub_section;
10262 htab->layout_sections_again = layout_sections_again;
10263
10264 if (htab->brlt == NULL)
10265 return 0;
10266
10267 /* Find the top input section id. */
10268 for (input_bfd = info->input_bfds, top_id = 3;
10269 input_bfd != NULL;
10270 input_bfd = input_bfd->link_next)
10271 {
10272 for (section = input_bfd->sections;
10273 section != NULL;
10274 section = section->next)
10275 {
10276 if (top_id < section->id)
10277 top_id = section->id;
10278 }
10279 }
10280
10281 htab->top_id = top_id;
10282 amt = sizeof (struct map_stub) * (top_id + 1);
10283 htab->stub_group = bfd_zmalloc (amt);
10284 if (htab->stub_group == NULL)
10285 return -1;
10286
10287 /* Set toc_off for com, und, abs and ind sections. */
10288 for (id = 0; id < 3; id++)
10289 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10290
10291 /* We can't use output_bfd->section_count here to find the top output
10292 section index as some sections may have been removed, and
10293 strip_excluded_output_sections doesn't renumber the indices. */
10294 for (section = info->output_bfd->sections, top_index = 0;
10295 section != NULL;
10296 section = section->next)
10297 {
10298 if (top_index < section->index)
10299 top_index = section->index;
10300 }
10301
10302 htab->top_index = top_index;
10303 amt = sizeof (asection *) * (top_index + 1);
10304 input_list = bfd_zmalloc (amt);
10305 htab->input_list = input_list;
10306 if (input_list == NULL)
10307 return -1;
10308
10309 return 1;
10310 }
10311
10312 /* Set up for first pass at multitoc partitioning. */
10313
10314 void
10315 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10316 {
10317 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10318
10319 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10320 htab->toc_curr = elf_gp (info->output_bfd);
10321 htab->toc_bfd = NULL;
10322 htab->toc_first_sec = NULL;
10323 }
10324
10325 /* The linker repeatedly calls this function for each TOC input section
10326 and linker generated GOT section. Group input bfds such that the toc
10327 within a group is less than 64k in size. */
10328
10329 bfd_boolean
10330 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10331 {
10332 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10333 bfd_vma addr, off, limit;
10334
10335 if (htab == NULL)
10336 return FALSE;
10337
10338 if (!htab->second_toc_pass)
10339 {
10340 /* Keep track of the first .toc or .got section for this input bfd. */
10341 if (htab->toc_bfd != isec->owner)
10342 {
10343 htab->toc_bfd = isec->owner;
10344 htab->toc_first_sec = isec;
10345 }
10346
10347 addr = isec->output_offset + isec->output_section->vma;
10348 off = addr - htab->toc_curr;
10349 limit = 0x80008000;
10350 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10351 limit = 0x10000;
10352 if (off + isec->size > limit)
10353 {
10354 addr = (htab->toc_first_sec->output_offset
10355 + htab->toc_first_sec->output_section->vma);
10356 htab->toc_curr = addr;
10357 }
10358
10359 /* toc_curr is the base address of this toc group. Set elf_gp
10360 for the input section to be the offset relative to the
10361 output toc base plus 0x8000. Making the input elf_gp an
10362 offset allows us to move the toc as a whole without
10363 recalculating input elf_gp. */
10364 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10365 off += TOC_BASE_OFF;
10366
10367 /* Die if someone uses a linker script that doesn't keep input
10368 file .toc and .got together. */
10369 if (elf_gp (isec->owner) != 0
10370 && elf_gp (isec->owner) != off)
10371 return FALSE;
10372
10373 elf_gp (isec->owner) = off;
10374 return TRUE;
10375 }
10376
10377 /* During the second pass toc_first_sec points to the start of
10378 a toc group, and toc_curr is used to track the old elf_gp.
10379 We use toc_bfd to ensure we only look at each bfd once. */
10380 if (htab->toc_bfd == isec->owner)
10381 return TRUE;
10382 htab->toc_bfd = isec->owner;
10383
10384 if (htab->toc_first_sec == NULL
10385 || htab->toc_curr != elf_gp (isec->owner))
10386 {
10387 htab->toc_curr = elf_gp (isec->owner);
10388 htab->toc_first_sec = isec;
10389 }
10390 addr = (htab->toc_first_sec->output_offset
10391 + htab->toc_first_sec->output_section->vma);
10392 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10393 elf_gp (isec->owner) = off;
10394
10395 return TRUE;
10396 }
10397
10398 /* Called via elf_link_hash_traverse to merge GOT entries for global
10399 symbol H. */
10400
10401 static bfd_boolean
10402 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10403 {
10404 if (h->root.type == bfd_link_hash_indirect)
10405 return TRUE;
10406
10407 merge_got_entries (&h->got.glist);
10408
10409 return TRUE;
10410 }
10411
10412 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10413 symbol H. */
10414
10415 static bfd_boolean
10416 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10417 {
10418 struct got_entry *gent;
10419
10420 if (h->root.type == bfd_link_hash_indirect)
10421 return TRUE;
10422
10423 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10424 if (!gent->is_indirect)
10425 allocate_got (h, (struct bfd_link_info *) inf, gent);
10426 return TRUE;
10427 }
10428
10429 /* Called on the first multitoc pass after the last call to
10430 ppc64_elf_next_toc_section. This function removes duplicate GOT
10431 entries. */
10432
10433 bfd_boolean
10434 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10435 {
10436 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10437 struct bfd *ibfd, *ibfd2;
10438 bfd_boolean done_something;
10439
10440 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10441
10442 if (!htab->do_multi_toc)
10443 return FALSE;
10444
10445 /* Merge global sym got entries within a toc group. */
10446 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10447
10448 /* And tlsld_got. */
10449 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10450 {
10451 struct got_entry *ent, *ent2;
10452
10453 if (!is_ppc64_elf (ibfd))
10454 continue;
10455
10456 ent = ppc64_tlsld_got (ibfd);
10457 if (!ent->is_indirect
10458 && ent->got.offset != (bfd_vma) -1)
10459 {
10460 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10461 {
10462 if (!is_ppc64_elf (ibfd2))
10463 continue;
10464
10465 ent2 = ppc64_tlsld_got (ibfd2);
10466 if (!ent2->is_indirect
10467 && ent2->got.offset != (bfd_vma) -1
10468 && elf_gp (ibfd2) == elf_gp (ibfd))
10469 {
10470 ent2->is_indirect = TRUE;
10471 ent2->got.ent = ent;
10472 }
10473 }
10474 }
10475 }
10476
10477 /* Zap sizes of got sections. */
10478 htab->reliplt->rawsize = htab->reliplt->size;
10479 htab->reliplt->size -= htab->got_reli_size;
10480 htab->got_reli_size = 0;
10481
10482 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10483 {
10484 asection *got, *relgot;
10485
10486 if (!is_ppc64_elf (ibfd))
10487 continue;
10488
10489 got = ppc64_elf_tdata (ibfd)->got;
10490 if (got != NULL)
10491 {
10492 got->rawsize = got->size;
10493 got->size = 0;
10494 relgot = ppc64_elf_tdata (ibfd)->relgot;
10495 relgot->rawsize = relgot->size;
10496 relgot->size = 0;
10497 }
10498 }
10499
10500 /* Now reallocate the got, local syms first. We don't need to
10501 allocate section contents again since we never increase size. */
10502 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10503 {
10504 struct got_entry **lgot_ents;
10505 struct got_entry **end_lgot_ents;
10506 struct plt_entry **local_plt;
10507 struct plt_entry **end_local_plt;
10508 unsigned char *lgot_masks;
10509 bfd_size_type locsymcount;
10510 Elf_Internal_Shdr *symtab_hdr;
10511 asection *s, *srel;
10512
10513 if (!is_ppc64_elf (ibfd))
10514 continue;
10515
10516 lgot_ents = elf_local_got_ents (ibfd);
10517 if (!lgot_ents)
10518 continue;
10519
10520 symtab_hdr = &elf_symtab_hdr (ibfd);
10521 locsymcount = symtab_hdr->sh_info;
10522 end_lgot_ents = lgot_ents + locsymcount;
10523 local_plt = (struct plt_entry **) end_lgot_ents;
10524 end_local_plt = local_plt + locsymcount;
10525 lgot_masks = (unsigned char *) end_local_plt;
10526 s = ppc64_elf_tdata (ibfd)->got;
10527 srel = ppc64_elf_tdata (ibfd)->relgot;
10528 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10529 {
10530 struct got_entry *ent;
10531
10532 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10533 {
10534 unsigned int num = 1;
10535 ent->got.offset = s->size;
10536 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10537 num = 2;
10538 s->size += num * 8;
10539 if (info->shared)
10540 srel->size += num * sizeof (Elf64_External_Rela);
10541 else if ((*lgot_masks & PLT_IFUNC) != 0)
10542 {
10543 htab->reliplt->size
10544 += num * sizeof (Elf64_External_Rela);
10545 htab->got_reli_size
10546 += num * sizeof (Elf64_External_Rela);
10547 }
10548 }
10549 }
10550 }
10551
10552 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10553
10554 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10555 {
10556 struct got_entry *ent;
10557
10558 if (!is_ppc64_elf (ibfd))
10559 continue;
10560
10561 ent = ppc64_tlsld_got (ibfd);
10562 if (!ent->is_indirect
10563 && ent->got.offset != (bfd_vma) -1)
10564 {
10565 asection *s = ppc64_elf_tdata (ibfd)->got;
10566 ent->got.offset = s->size;
10567 s->size += 16;
10568 if (info->shared)
10569 {
10570 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10571 srel->size += sizeof (Elf64_External_Rela);
10572 }
10573 }
10574 }
10575
10576 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10577 if (!done_something)
10578 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10579 {
10580 asection *got;
10581
10582 if (!is_ppc64_elf (ibfd))
10583 continue;
10584
10585 got = ppc64_elf_tdata (ibfd)->got;
10586 if (got != NULL)
10587 {
10588 done_something = got->rawsize != got->size;
10589 if (done_something)
10590 break;
10591 }
10592 }
10593
10594 if (done_something)
10595 (*htab->layout_sections_again) ();
10596
10597 /* Set up for second pass over toc sections to recalculate elf_gp
10598 on input sections. */
10599 htab->toc_bfd = NULL;
10600 htab->toc_first_sec = NULL;
10601 htab->second_toc_pass = TRUE;
10602 return done_something;
10603 }
10604
10605 /* Called after second pass of multitoc partitioning. */
10606
10607 void
10608 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10609 {
10610 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10611
10612 /* After the second pass, toc_curr tracks the TOC offset used
10613 for code sections below in ppc64_elf_next_input_section. */
10614 htab->toc_curr = TOC_BASE_OFF;
10615 }
10616
10617 /* No toc references were found in ISEC. If the code in ISEC makes no
10618 calls, then there's no need to use toc adjusting stubs when branching
10619 into ISEC. Actually, indirect calls from ISEC are OK as they will
10620 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10621 needed, and 2 if a cyclical call-graph was found but no other reason
10622 for a stub was detected. If called from the top level, a return of
10623 2 means the same as a return of 0. */
10624
10625 static int
10626 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10627 {
10628 int ret;
10629
10630 /* Mark this section as checked. */
10631 isec->call_check_done = 1;
10632
10633 /* We know none of our code bearing sections will need toc stubs. */
10634 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10635 return 0;
10636
10637 if (isec->size == 0)
10638 return 0;
10639
10640 if (isec->output_section == NULL)
10641 return 0;
10642
10643 ret = 0;
10644 if (isec->reloc_count != 0)
10645 {
10646 Elf_Internal_Rela *relstart, *rel;
10647 Elf_Internal_Sym *local_syms;
10648 struct ppc_link_hash_table *htab;
10649
10650 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10651 info->keep_memory);
10652 if (relstart == NULL)
10653 return -1;
10654
10655 /* Look for branches to outside of this section. */
10656 local_syms = NULL;
10657 htab = ppc_hash_table (info);
10658 if (htab == NULL)
10659 return -1;
10660
10661 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10662 {
10663 enum elf_ppc64_reloc_type r_type;
10664 unsigned long r_symndx;
10665 struct elf_link_hash_entry *h;
10666 struct ppc_link_hash_entry *eh;
10667 Elf_Internal_Sym *sym;
10668 asection *sym_sec;
10669 struct _opd_sec_data *opd;
10670 bfd_vma sym_value;
10671 bfd_vma dest;
10672
10673 r_type = ELF64_R_TYPE (rel->r_info);
10674 if (r_type != R_PPC64_REL24
10675 && r_type != R_PPC64_REL14
10676 && r_type != R_PPC64_REL14_BRTAKEN
10677 && r_type != R_PPC64_REL14_BRNTAKEN)
10678 continue;
10679
10680 r_symndx = ELF64_R_SYM (rel->r_info);
10681 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10682 isec->owner))
10683 {
10684 ret = -1;
10685 break;
10686 }
10687
10688 /* Calls to dynamic lib functions go through a plt call stub
10689 that uses r2. */
10690 eh = (struct ppc_link_hash_entry *) h;
10691 if (eh != NULL
10692 && (eh->elf.plt.plist != NULL
10693 || (eh->oh != NULL
10694 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10695 {
10696 ret = 1;
10697 break;
10698 }
10699
10700 if (sym_sec == NULL)
10701 /* Ignore other undefined symbols. */
10702 continue;
10703
10704 /* Assume branches to other sections not included in the
10705 link need stubs too, to cover -R and absolute syms. */
10706 if (sym_sec->output_section == NULL)
10707 {
10708 ret = 1;
10709 break;
10710 }
10711
10712 if (h == NULL)
10713 sym_value = sym->st_value;
10714 else
10715 {
10716 if (h->root.type != bfd_link_hash_defined
10717 && h->root.type != bfd_link_hash_defweak)
10718 abort ();
10719 sym_value = h->root.u.def.value;
10720 }
10721 sym_value += rel->r_addend;
10722
10723 /* If this branch reloc uses an opd sym, find the code section. */
10724 opd = get_opd_info (sym_sec);
10725 if (opd != NULL)
10726 {
10727 if (h == NULL && opd->adjust != NULL)
10728 {
10729 long adjust;
10730
10731 adjust = opd->adjust[sym->st_value / 8];
10732 if (adjust == -1)
10733 /* Assume deleted functions won't ever be called. */
10734 continue;
10735 sym_value += adjust;
10736 }
10737
10738 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10739 if (dest == (bfd_vma) -1)
10740 continue;
10741 }
10742 else
10743 dest = (sym_value
10744 + sym_sec->output_offset
10745 + sym_sec->output_section->vma);
10746
10747 /* Ignore branch to self. */
10748 if (sym_sec == isec)
10749 continue;
10750
10751 /* If the called function uses the toc, we need a stub. */
10752 if (sym_sec->has_toc_reloc
10753 || sym_sec->makes_toc_func_call)
10754 {
10755 ret = 1;
10756 break;
10757 }
10758
10759 /* Assume any branch that needs a long branch stub might in fact
10760 need a plt_branch stub. A plt_branch stub uses r2. */
10761 else if (dest - (isec->output_offset
10762 + isec->output_section->vma
10763 + rel->r_offset) + (1 << 25) >= (2 << 25))
10764 {
10765 ret = 1;
10766 break;
10767 }
10768
10769 /* If calling back to a section in the process of being
10770 tested, we can't say for sure that no toc adjusting stubs
10771 are needed, so don't return zero. */
10772 else if (sym_sec->call_check_in_progress)
10773 ret = 2;
10774
10775 /* Branches to another section that itself doesn't have any TOC
10776 references are OK. Recursively call ourselves to check. */
10777 else if (!sym_sec->call_check_done)
10778 {
10779 int recur;
10780
10781 /* Mark current section as indeterminate, so that other
10782 sections that call back to current won't be marked as
10783 known. */
10784 isec->call_check_in_progress = 1;
10785 recur = toc_adjusting_stub_needed (info, sym_sec);
10786 isec->call_check_in_progress = 0;
10787
10788 if (recur != 0)
10789 {
10790 ret = recur;
10791 if (recur != 2)
10792 break;
10793 }
10794 }
10795 }
10796
10797 if (local_syms != NULL
10798 && (elf_symtab_hdr (isec->owner).contents
10799 != (unsigned char *) local_syms))
10800 free (local_syms);
10801 if (elf_section_data (isec)->relocs != relstart)
10802 free (relstart);
10803 }
10804
10805 if ((ret & 1) == 0
10806 && isec->map_head.s != NULL
10807 && (strcmp (isec->output_section->name, ".init") == 0
10808 || strcmp (isec->output_section->name, ".fini") == 0))
10809 {
10810 if (isec->map_head.s->has_toc_reloc
10811 || isec->map_head.s->makes_toc_func_call)
10812 ret = 1;
10813 else if (!isec->map_head.s->call_check_done)
10814 {
10815 int recur;
10816 isec->call_check_in_progress = 1;
10817 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10818 isec->call_check_in_progress = 0;
10819 if (recur != 0)
10820 ret = recur;
10821 }
10822 }
10823
10824 if (ret == 1)
10825 isec->makes_toc_func_call = 1;
10826
10827 return ret;
10828 }
10829
10830 /* The linker repeatedly calls this function for each input section,
10831 in the order that input sections are linked into output sections.
10832 Build lists of input sections to determine groupings between which
10833 we may insert linker stubs. */
10834
10835 bfd_boolean
10836 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10837 {
10838 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10839
10840 if (htab == NULL)
10841 return FALSE;
10842
10843 if ((isec->output_section->flags & SEC_CODE) != 0
10844 && isec->output_section->index <= htab->top_index)
10845 {
10846 asection **list = htab->input_list + isec->output_section->index;
10847 /* Steal the link_sec pointer for our list. */
10848 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10849 /* This happens to make the list in reverse order,
10850 which is what we want. */
10851 PREV_SEC (isec) = *list;
10852 *list = isec;
10853 }
10854
10855 if (htab->multi_toc_needed)
10856 {
10857 /* If a code section has a function that uses the TOC then we need
10858 to use the right TOC (obviously). Also, make sure that .opd gets
10859 the correct TOC value for R_PPC64_TOC relocs that don't have or
10860 can't find their function symbol (shouldn't ever happen now).
10861 Also specially treat .fixup for the linux kernel. .fixup
10862 contains branches, but only back to the function that hit an
10863 exception. */
10864 if (isec->has_toc_reloc
10865 || (isec->flags & SEC_CODE) == 0
10866 || strcmp (isec->name, ".fixup") == 0)
10867 {
10868 if (elf_gp (isec->owner) != 0)
10869 htab->toc_curr = elf_gp (isec->owner);
10870 }
10871 else
10872 {
10873 if (!isec->call_check_done
10874 && toc_adjusting_stub_needed (info, isec) < 0)
10875 return FALSE;
10876 /* If we make a local call from this section, ie. a branch
10877 without a following nop, then we have no place to put a
10878 toc restoring insn. We must use the same toc group as
10879 the callee.
10880 Testing makes_toc_func_call actually tests for *any*
10881 calls to functions that need a good toc pointer. A more
10882 precise test would be better, as this one will set
10883 incorrect values for pasted .init/.fini fragments.
10884 (Fixed later in check_pasted_section.) */
10885 if (isec->makes_toc_func_call
10886 && elf_gp (isec->owner) != 0)
10887 htab->toc_curr = elf_gp (isec->owner);
10888 }
10889 }
10890
10891 /* Functions that don't use the TOC can belong in any TOC group.
10892 Use the last TOC base. */
10893 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10894 return TRUE;
10895 }
10896
10897 /* Check that all .init and .fini sections use the same toc, if they
10898 have toc relocs. */
10899
10900 static bfd_boolean
10901 check_pasted_section (struct bfd_link_info *info, const char *name)
10902 {
10903 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10904
10905 if (o != NULL)
10906 {
10907 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10908 bfd_vma toc_off = 0;
10909 asection *i;
10910
10911 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10912 if (i->has_toc_reloc)
10913 {
10914 if (toc_off == 0)
10915 toc_off = htab->stub_group[i->id].toc_off;
10916 else if (toc_off != htab->stub_group[i->id].toc_off)
10917 return FALSE;
10918 }
10919
10920 if (toc_off == 0)
10921 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10922 if (i->makes_toc_func_call)
10923 {
10924 toc_off = htab->stub_group[i->id].toc_off;
10925 break;
10926 }
10927
10928 /* Make sure the whole pasted function uses the same toc offset. */
10929 if (toc_off != 0)
10930 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10931 htab->stub_group[i->id].toc_off = toc_off;
10932 }
10933 return TRUE;
10934 }
10935
10936 bfd_boolean
10937 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10938 {
10939 return (check_pasted_section (info, ".init")
10940 & check_pasted_section (info, ".fini"));
10941 }
10942
10943 /* See whether we can group stub sections together. Grouping stub
10944 sections may result in fewer stubs. More importantly, we need to
10945 put all .init* and .fini* stubs at the beginning of the .init or
10946 .fini output sections respectively, because glibc splits the
10947 _init and _fini functions into multiple parts. Putting a stub in
10948 the middle of a function is not a good idea. */
10949
10950 static void
10951 group_sections (struct ppc_link_hash_table *htab,
10952 bfd_size_type stub_group_size,
10953 bfd_boolean stubs_always_before_branch)
10954 {
10955 asection **list;
10956 bfd_size_type stub14_group_size;
10957 bfd_boolean suppress_size_errors;
10958
10959 suppress_size_errors = FALSE;
10960 stub14_group_size = stub_group_size;
10961 if (stub_group_size == 1)
10962 {
10963 /* Default values. */
10964 if (stubs_always_before_branch)
10965 {
10966 stub_group_size = 0x1e00000;
10967 stub14_group_size = 0x7800;
10968 }
10969 else
10970 {
10971 stub_group_size = 0x1c00000;
10972 stub14_group_size = 0x7000;
10973 }
10974 suppress_size_errors = TRUE;
10975 }
10976
10977 list = htab->input_list + htab->top_index;
10978 do
10979 {
10980 asection *tail = *list;
10981 while (tail != NULL)
10982 {
10983 asection *curr;
10984 asection *prev;
10985 bfd_size_type total;
10986 bfd_boolean big_sec;
10987 bfd_vma curr_toc;
10988
10989 curr = tail;
10990 total = tail->size;
10991 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10992 && ppc64_elf_section_data (tail)->has_14bit_branch
10993 ? stub14_group_size : stub_group_size);
10994 if (big_sec && !suppress_size_errors)
10995 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10996 tail->owner, tail);
10997 curr_toc = htab->stub_group[tail->id].toc_off;
10998
10999 while ((prev = PREV_SEC (curr)) != NULL
11000 && ((total += curr->output_offset - prev->output_offset)
11001 < (ppc64_elf_section_data (prev) != NULL
11002 && ppc64_elf_section_data (prev)->has_14bit_branch
11003 ? stub14_group_size : stub_group_size))
11004 && htab->stub_group[prev->id].toc_off == curr_toc)
11005 curr = prev;
11006
11007 /* OK, the size from the start of CURR to the end is less
11008 than stub_group_size and thus can be handled by one stub
11009 section. (or the tail section is itself larger than
11010 stub_group_size, in which case we may be toast.) We
11011 should really be keeping track of the total size of stubs
11012 added here, as stubs contribute to the final output
11013 section size. That's a little tricky, and this way will
11014 only break if stubs added make the total size more than
11015 2^25, ie. for the default stub_group_size, if stubs total
11016 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11017 do
11018 {
11019 prev = PREV_SEC (tail);
11020 /* Set up this stub group. */
11021 htab->stub_group[tail->id].link_sec = curr;
11022 }
11023 while (tail != curr && (tail = prev) != NULL);
11024
11025 /* But wait, there's more! Input sections up to stub_group_size
11026 bytes before the stub section can be handled by it too.
11027 Don't do this if we have a really large section after the
11028 stubs, as adding more stubs increases the chance that
11029 branches may not reach into the stub section. */
11030 if (!stubs_always_before_branch && !big_sec)
11031 {
11032 total = 0;
11033 while (prev != NULL
11034 && ((total += tail->output_offset - prev->output_offset)
11035 < (ppc64_elf_section_data (prev) != NULL
11036 && ppc64_elf_section_data (prev)->has_14bit_branch
11037 ? stub14_group_size : stub_group_size))
11038 && htab->stub_group[prev->id].toc_off == curr_toc)
11039 {
11040 tail = prev;
11041 prev = PREV_SEC (tail);
11042 htab->stub_group[tail->id].link_sec = curr;
11043 }
11044 }
11045 tail = prev;
11046 }
11047 }
11048 while (list-- != htab->input_list);
11049 free (htab->input_list);
11050 #undef PREV_SEC
11051 }
11052
11053 static const unsigned char glink_eh_frame_cie[] =
11054 {
11055 0, 0, 0, 16, /* length. */
11056 0, 0, 0, 0, /* id. */
11057 1, /* CIE version. */
11058 'z', 'R', 0, /* Augmentation string. */
11059 4, /* Code alignment. */
11060 0x78, /* Data alignment. */
11061 65, /* RA reg. */
11062 1, /* Augmentation size. */
11063 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11064 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11065 };
11066
11067 /* Stripping output sections is normally done before dynamic section
11068 symbols have been allocated. This function is called later, and
11069 handles cases like htab->brlt which is mapped to its own output
11070 section. */
11071
11072 static void
11073 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11074 {
11075 if (isec->size == 0
11076 && isec->output_section->size == 0
11077 && !bfd_section_removed_from_list (info->output_bfd,
11078 isec->output_section)
11079 && elf_section_data (isec->output_section)->dynindx == 0)
11080 {
11081 isec->output_section->flags |= SEC_EXCLUDE;
11082 bfd_section_list_remove (info->output_bfd, isec->output_section);
11083 info->output_bfd->section_count--;
11084 }
11085 }
11086
11087 /* Determine and set the size of the stub section for a final link.
11088
11089 The basic idea here is to examine all the relocations looking for
11090 PC-relative calls to a target that is unreachable with a "bl"
11091 instruction. */
11092
11093 bfd_boolean
11094 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11095 bfd_boolean plt_static_chain)
11096 {
11097 bfd_size_type stub_group_size;
11098 bfd_boolean stubs_always_before_branch;
11099 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11100
11101 if (htab == NULL)
11102 return FALSE;
11103
11104 htab->plt_static_chain = plt_static_chain;
11105 stubs_always_before_branch = group_size < 0;
11106 if (group_size < 0)
11107 stub_group_size = -group_size;
11108 else
11109 stub_group_size = group_size;
11110
11111 group_sections (htab, stub_group_size, stubs_always_before_branch);
11112
11113 while (1)
11114 {
11115 bfd *input_bfd;
11116 unsigned int bfd_indx;
11117 asection *stub_sec;
11118
11119 htab->stub_iteration += 1;
11120
11121 for (input_bfd = info->input_bfds, bfd_indx = 0;
11122 input_bfd != NULL;
11123 input_bfd = input_bfd->link_next, bfd_indx++)
11124 {
11125 Elf_Internal_Shdr *symtab_hdr;
11126 asection *section;
11127 Elf_Internal_Sym *local_syms = NULL;
11128
11129 if (!is_ppc64_elf (input_bfd))
11130 continue;
11131
11132 /* We'll need the symbol table in a second. */
11133 symtab_hdr = &elf_symtab_hdr (input_bfd);
11134 if (symtab_hdr->sh_info == 0)
11135 continue;
11136
11137 /* Walk over each section attached to the input bfd. */
11138 for (section = input_bfd->sections;
11139 section != NULL;
11140 section = section->next)
11141 {
11142 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11143
11144 /* If there aren't any relocs, then there's nothing more
11145 to do. */
11146 if ((section->flags & SEC_RELOC) == 0
11147 || (section->flags & SEC_ALLOC) == 0
11148 || (section->flags & SEC_LOAD) == 0
11149 || (section->flags & SEC_CODE) == 0
11150 || section->reloc_count == 0)
11151 continue;
11152
11153 /* If this section is a link-once section that will be
11154 discarded, then don't create any stubs. */
11155 if (section->output_section == NULL
11156 || section->output_section->owner != info->output_bfd)
11157 continue;
11158
11159 /* Get the relocs. */
11160 internal_relocs
11161 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11162 info->keep_memory);
11163 if (internal_relocs == NULL)
11164 goto error_ret_free_local;
11165
11166 /* Now examine each relocation. */
11167 irela = internal_relocs;
11168 irelaend = irela + section->reloc_count;
11169 for (; irela < irelaend; irela++)
11170 {
11171 enum elf_ppc64_reloc_type r_type;
11172 unsigned int r_indx;
11173 enum ppc_stub_type stub_type;
11174 struct ppc_stub_hash_entry *stub_entry;
11175 asection *sym_sec, *code_sec;
11176 bfd_vma sym_value, code_value;
11177 bfd_vma destination;
11178 bfd_boolean ok_dest;
11179 struct ppc_link_hash_entry *hash;
11180 struct ppc_link_hash_entry *fdh;
11181 struct elf_link_hash_entry *h;
11182 Elf_Internal_Sym *sym;
11183 char *stub_name;
11184 const asection *id_sec;
11185 struct _opd_sec_data *opd;
11186 struct plt_entry *plt_ent;
11187
11188 r_type = ELF64_R_TYPE (irela->r_info);
11189 r_indx = ELF64_R_SYM (irela->r_info);
11190
11191 if (r_type >= R_PPC64_max)
11192 {
11193 bfd_set_error (bfd_error_bad_value);
11194 goto error_ret_free_internal;
11195 }
11196
11197 /* Only look for stubs on branch instructions. */
11198 if (r_type != R_PPC64_REL24
11199 && r_type != R_PPC64_REL14
11200 && r_type != R_PPC64_REL14_BRTAKEN
11201 && r_type != R_PPC64_REL14_BRNTAKEN)
11202 continue;
11203
11204 /* Now determine the call target, its name, value,
11205 section. */
11206 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11207 r_indx, input_bfd))
11208 goto error_ret_free_internal;
11209 hash = (struct ppc_link_hash_entry *) h;
11210
11211 ok_dest = FALSE;
11212 fdh = NULL;
11213 sym_value = 0;
11214 if (hash == NULL)
11215 {
11216 sym_value = sym->st_value;
11217 ok_dest = TRUE;
11218 }
11219 else if (hash->elf.root.type == bfd_link_hash_defined
11220 || hash->elf.root.type == bfd_link_hash_defweak)
11221 {
11222 sym_value = hash->elf.root.u.def.value;
11223 if (sym_sec->output_section != NULL)
11224 ok_dest = TRUE;
11225 }
11226 else if (hash->elf.root.type == bfd_link_hash_undefweak
11227 || hash->elf.root.type == bfd_link_hash_undefined)
11228 {
11229 /* Recognise an old ABI func code entry sym, and
11230 use the func descriptor sym instead if it is
11231 defined. */
11232 if (hash->elf.root.root.string[0] == '.'
11233 && (fdh = lookup_fdh (hash, htab)) != NULL)
11234 {
11235 if (fdh->elf.root.type == bfd_link_hash_defined
11236 || fdh->elf.root.type == bfd_link_hash_defweak)
11237 {
11238 sym_sec = fdh->elf.root.u.def.section;
11239 sym_value = fdh->elf.root.u.def.value;
11240 if (sym_sec->output_section != NULL)
11241 ok_dest = TRUE;
11242 }
11243 else
11244 fdh = NULL;
11245 }
11246 }
11247 else
11248 {
11249 bfd_set_error (bfd_error_bad_value);
11250 goto error_ret_free_internal;
11251 }
11252
11253 destination = 0;
11254 if (ok_dest)
11255 {
11256 sym_value += irela->r_addend;
11257 destination = (sym_value
11258 + sym_sec->output_offset
11259 + sym_sec->output_section->vma);
11260 }
11261
11262 code_sec = sym_sec;
11263 code_value = sym_value;
11264 opd = get_opd_info (sym_sec);
11265 if (opd != NULL)
11266 {
11267 bfd_vma dest;
11268
11269 if (hash == NULL && opd->adjust != NULL)
11270 {
11271 long adjust = opd->adjust[sym_value / 8];
11272 if (adjust == -1)
11273 continue;
11274 code_value += adjust;
11275 sym_value += adjust;
11276 }
11277 dest = opd_entry_value (sym_sec, sym_value,
11278 &code_sec, &code_value);
11279 if (dest != (bfd_vma) -1)
11280 {
11281 destination = dest;
11282 if (fdh != NULL)
11283 {
11284 /* Fixup old ABI sym to point at code
11285 entry. */
11286 hash->elf.root.type = bfd_link_hash_defweak;
11287 hash->elf.root.u.def.section = code_sec;
11288 hash->elf.root.u.def.value = code_value;
11289 }
11290 }
11291 }
11292
11293 /* Determine what (if any) linker stub is needed. */
11294 plt_ent = NULL;
11295 stub_type = ppc_type_of_stub (section, irela, &hash,
11296 &plt_ent, destination);
11297
11298 if (stub_type != ppc_stub_plt_call)
11299 {
11300 /* Check whether we need a TOC adjusting stub.
11301 Since the linker pastes together pieces from
11302 different object files when creating the
11303 _init and _fini functions, it may be that a
11304 call to what looks like a local sym is in
11305 fact a call needing a TOC adjustment. */
11306 if (code_sec != NULL
11307 && code_sec->output_section != NULL
11308 && (htab->stub_group[code_sec->id].toc_off
11309 != htab->stub_group[section->id].toc_off)
11310 && (code_sec->has_toc_reloc
11311 || code_sec->makes_toc_func_call))
11312 stub_type = ppc_stub_long_branch_r2off;
11313 }
11314
11315 if (stub_type == ppc_stub_none)
11316 continue;
11317
11318 /* __tls_get_addr calls might be eliminated. */
11319 if (stub_type != ppc_stub_plt_call
11320 && hash != NULL
11321 && (hash == htab->tls_get_addr
11322 || hash == htab->tls_get_addr_fd)
11323 && section->has_tls_reloc
11324 && irela != internal_relocs)
11325 {
11326 /* Get tls info. */
11327 unsigned char *tls_mask;
11328
11329 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11330 irela - 1, input_bfd))
11331 goto error_ret_free_internal;
11332 if (*tls_mask != 0)
11333 continue;
11334 }
11335
11336 if (stub_type == ppc_stub_plt_call
11337 && irela + 1 < irelaend
11338 && irela[1].r_offset == irela->r_offset + 4
11339 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE
11340 && !tocsave_find (htab, INSERT,
11341 &local_syms, irela + 1, input_bfd))
11342 goto error_ret_free_internal;
11343
11344 /* Support for grouping stub sections. */
11345 id_sec = htab->stub_group[section->id].link_sec;
11346
11347 /* Get the name of this stub. */
11348 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11349 if (!stub_name)
11350 goto error_ret_free_internal;
11351
11352 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11353 stub_name, FALSE, FALSE);
11354 if (stub_entry != NULL)
11355 {
11356 /* The proper stub has already been created. */
11357 free (stub_name);
11358 continue;
11359 }
11360
11361 stub_entry = ppc_add_stub (stub_name, section, info);
11362 if (stub_entry == NULL)
11363 {
11364 free (stub_name);
11365 error_ret_free_internal:
11366 if (elf_section_data (section)->relocs == NULL)
11367 free (internal_relocs);
11368 error_ret_free_local:
11369 if (local_syms != NULL
11370 && (symtab_hdr->contents
11371 != (unsigned char *) local_syms))
11372 free (local_syms);
11373 return FALSE;
11374 }
11375
11376 stub_entry->stub_type = stub_type;
11377 if (stub_type != ppc_stub_plt_call)
11378 {
11379 stub_entry->target_value = code_value;
11380 stub_entry->target_section = code_sec;
11381 }
11382 else
11383 {
11384 stub_entry->target_value = sym_value;
11385 stub_entry->target_section = sym_sec;
11386 }
11387 stub_entry->h = hash;
11388 stub_entry->plt_ent = plt_ent;
11389 stub_entry->addend = irela->r_addend;
11390
11391 if (stub_entry->h != NULL)
11392 htab->stub_globals += 1;
11393 }
11394
11395 /* We're done with the internal relocs, free them. */
11396 if (elf_section_data (section)->relocs != internal_relocs)
11397 free (internal_relocs);
11398 }
11399
11400 if (local_syms != NULL
11401 && symtab_hdr->contents != (unsigned char *) local_syms)
11402 {
11403 if (!info->keep_memory)
11404 free (local_syms);
11405 else
11406 symtab_hdr->contents = (unsigned char *) local_syms;
11407 }
11408 }
11409
11410 /* We may have added some stubs. Find out the new size of the
11411 stub sections. */
11412 for (stub_sec = htab->stub_bfd->sections;
11413 stub_sec != NULL;
11414 stub_sec = stub_sec->next)
11415 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11416 {
11417 stub_sec->rawsize = stub_sec->size;
11418 stub_sec->size = 0;
11419 stub_sec->reloc_count = 0;
11420 stub_sec->flags &= ~SEC_RELOC;
11421 }
11422
11423 htab->brlt->size = 0;
11424 htab->brlt->reloc_count = 0;
11425 htab->brlt->flags &= ~SEC_RELOC;
11426 if (htab->relbrlt != NULL)
11427 htab->relbrlt->size = 0;
11428
11429 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11430
11431 if (info->emitrelocations
11432 && htab->glink != NULL && htab->glink->size != 0)
11433 {
11434 htab->glink->reloc_count = 1;
11435 htab->glink->flags |= SEC_RELOC;
11436 }
11437
11438 if (htab->glink_eh_frame != NULL
11439 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11440 && (htab->glink_eh_frame->flags & SEC_EXCLUDE) == 0)
11441 {
11442 bfd_size_type size = 0;
11443
11444 for (stub_sec = htab->stub_bfd->sections;
11445 stub_sec != NULL;
11446 stub_sec = stub_sec->next)
11447 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11448 size += 20;
11449 if (htab->glink != NULL && htab->glink->size != 0)
11450 size += 24;
11451 if (size != 0)
11452 size += sizeof (glink_eh_frame_cie);
11453 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11454 htab->glink_eh_frame->size = size;
11455 }
11456
11457 for (stub_sec = htab->stub_bfd->sections;
11458 stub_sec != NULL;
11459 stub_sec = stub_sec->next)
11460 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11461 && stub_sec->rawsize != stub_sec->size)
11462 break;
11463
11464 /* Exit from this loop when no stubs have been added, and no stubs
11465 have changed size. */
11466 if (stub_sec == NULL
11467 && (htab->glink_eh_frame == NULL
11468 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11469 break;
11470
11471 /* Ask the linker to do its stuff. */
11472 (*htab->layout_sections_again) ();
11473 }
11474
11475 maybe_strip_output (info, htab->brlt);
11476 if (htab->glink_eh_frame != NULL)
11477 maybe_strip_output (info, htab->glink_eh_frame);
11478
11479 return TRUE;
11480 }
11481
11482 /* Called after we have determined section placement. If sections
11483 move, we'll be called again. Provide a value for TOCstart. */
11484
11485 bfd_vma
11486 ppc64_elf_toc (bfd *obfd)
11487 {
11488 asection *s;
11489 bfd_vma TOCstart;
11490
11491 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11492 order. The TOC starts where the first of these sections starts. */
11493 s = bfd_get_section_by_name (obfd, ".got");
11494 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11495 s = bfd_get_section_by_name (obfd, ".toc");
11496 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11497 s = bfd_get_section_by_name (obfd, ".tocbss");
11498 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11499 s = bfd_get_section_by_name (obfd, ".plt");
11500 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11501 {
11502 /* This may happen for
11503 o references to TOC base (SYM@toc / TOC[tc0]) without a
11504 .toc directive
11505 o bad linker script
11506 o --gc-sections and empty TOC sections
11507
11508 FIXME: Warn user? */
11509
11510 /* Look for a likely section. We probably won't even be
11511 using TOCstart. */
11512 for (s = obfd->sections; s != NULL; s = s->next)
11513 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11514 | SEC_EXCLUDE))
11515 == (SEC_ALLOC | SEC_SMALL_DATA))
11516 break;
11517 if (s == NULL)
11518 for (s = obfd->sections; s != NULL; s = s->next)
11519 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11520 == (SEC_ALLOC | SEC_SMALL_DATA))
11521 break;
11522 if (s == NULL)
11523 for (s = obfd->sections; s != NULL; s = s->next)
11524 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11525 == SEC_ALLOC)
11526 break;
11527 if (s == NULL)
11528 for (s = obfd->sections; s != NULL; s = s->next)
11529 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11530 break;
11531 }
11532
11533 TOCstart = 0;
11534 if (s != NULL)
11535 TOCstart = s->output_section->vma + s->output_offset;
11536
11537 return TOCstart;
11538 }
11539
11540 /* Build all the stubs associated with the current output file.
11541 The stubs are kept in a hash table attached to the main linker
11542 hash table. This function is called via gldelf64ppc_finish. */
11543
11544 bfd_boolean
11545 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11546 struct bfd_link_info *info,
11547 char **stats)
11548 {
11549 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11550 asection *stub_sec;
11551 bfd_byte *p;
11552 int stub_sec_count = 0;
11553
11554 if (htab == NULL)
11555 return FALSE;
11556
11557 htab->emit_stub_syms = emit_stub_syms;
11558
11559 /* Allocate memory to hold the linker stubs. */
11560 for (stub_sec = htab->stub_bfd->sections;
11561 stub_sec != NULL;
11562 stub_sec = stub_sec->next)
11563 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11564 && stub_sec->size != 0)
11565 {
11566 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11567 if (stub_sec->contents == NULL)
11568 return FALSE;
11569 /* We want to check that built size is the same as calculated
11570 size. rawsize is a convenient location to use. */
11571 stub_sec->rawsize = stub_sec->size;
11572 stub_sec->size = 0;
11573 }
11574
11575 if (htab->glink != NULL && htab->glink->size != 0)
11576 {
11577 unsigned int indx;
11578 bfd_vma plt0;
11579
11580 /* Build the .glink plt call stub. */
11581 if (htab->emit_stub_syms)
11582 {
11583 struct elf_link_hash_entry *h;
11584 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11585 TRUE, FALSE, FALSE);
11586 if (h == NULL)
11587 return FALSE;
11588 if (h->root.type == bfd_link_hash_new)
11589 {
11590 h->root.type = bfd_link_hash_defined;
11591 h->root.u.def.section = htab->glink;
11592 h->root.u.def.value = 8;
11593 h->ref_regular = 1;
11594 h->def_regular = 1;
11595 h->ref_regular_nonweak = 1;
11596 h->forced_local = 1;
11597 h->non_elf = 0;
11598 }
11599 }
11600 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11601 if (info->emitrelocations)
11602 {
11603 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11604 if (r == NULL)
11605 return FALSE;
11606 r->r_offset = (htab->glink->output_offset
11607 + htab->glink->output_section->vma);
11608 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11609 r->r_addend = plt0;
11610 }
11611 p = htab->glink->contents;
11612 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11613 bfd_put_64 (htab->glink->owner, plt0, p);
11614 p += 8;
11615 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11616 p += 4;
11617 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11618 p += 4;
11619 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11620 p += 4;
11621 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11622 p += 4;
11623 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11624 p += 4;
11625 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11626 p += 4;
11627 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11628 p += 4;
11629 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11630 p += 4;
11631 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11632 p += 4;
11633 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11634 p += 4;
11635 bfd_put_32 (htab->glink->owner, BCTR, p);
11636 p += 4;
11637 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11638 {
11639 bfd_put_32 (htab->glink->owner, NOP, p);
11640 p += 4;
11641 }
11642
11643 /* Build the .glink lazy link call stubs. */
11644 indx = 0;
11645 while (p < htab->glink->contents + htab->glink->size)
11646 {
11647 if (indx < 0x8000)
11648 {
11649 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11650 p += 4;
11651 }
11652 else
11653 {
11654 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11655 p += 4;
11656 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11657 p += 4;
11658 }
11659 bfd_put_32 (htab->glink->owner,
11660 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11661 indx++;
11662 p += 4;
11663 }
11664 htab->glink->rawsize = p - htab->glink->contents;
11665 }
11666
11667 if (htab->brlt->size != 0)
11668 {
11669 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11670 htab->brlt->size);
11671 if (htab->brlt->contents == NULL)
11672 return FALSE;
11673 }
11674 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11675 {
11676 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11677 htab->relbrlt->size);
11678 if (htab->relbrlt->contents == NULL)
11679 return FALSE;
11680 }
11681
11682 if (htab->glink_eh_frame != NULL
11683 && htab->glink_eh_frame->size != 0)
11684 {
11685 bfd_vma val;
11686
11687 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
11688 if (p == NULL)
11689 return FALSE;
11690 htab->glink_eh_frame->contents = p;
11691
11692 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11693
11694 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
11695 /* CIE length (rewrite in case little-endian). */
11696 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
11697 p += sizeof (glink_eh_frame_cie);
11698
11699 for (stub_sec = htab->stub_bfd->sections;
11700 stub_sec != NULL;
11701 stub_sec = stub_sec->next)
11702 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11703 {
11704 /* FDE length. */
11705 bfd_put_32 (htab->elf.dynobj, 16, p);
11706 p += 4;
11707 /* CIE pointer. */
11708 val = p - htab->glink_eh_frame->contents;
11709 bfd_put_32 (htab->elf.dynobj, val, p);
11710 p += 4;
11711 /* Offset to stub section. */
11712 val = (stub_sec->output_section->vma
11713 + stub_sec->output_offset);
11714 val -= (htab->glink_eh_frame->output_section->vma
11715 + htab->glink_eh_frame->output_offset);
11716 val -= p - htab->glink_eh_frame->contents;
11717 if (val + 0x80000000 > 0xffffffff)
11718 {
11719 info->callbacks->einfo
11720 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
11721 stub_sec->name);
11722 return FALSE;
11723 }
11724 bfd_put_32 (htab->elf.dynobj, val, p);
11725 p += 4;
11726 /* stub section size. */
11727 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
11728 p += 4;
11729 /* Augmentation. */
11730 p += 1;
11731 /* Pad. */
11732 p += 3;
11733 }
11734 if (htab->glink != NULL && htab->glink->size != 0)
11735 {
11736 /* FDE length. */
11737 bfd_put_32 (htab->elf.dynobj, 20, p);
11738 p += 4;
11739 /* CIE pointer. */
11740 val = p - htab->glink_eh_frame->contents;
11741 bfd_put_32 (htab->elf.dynobj, val, p);
11742 p += 4;
11743 /* Offset to .glink. */
11744 val = (htab->glink->output_section->vma
11745 + htab->glink->output_offset
11746 + 8);
11747 val -= (htab->glink_eh_frame->output_section->vma
11748 + htab->glink_eh_frame->output_offset);
11749 val -= p - htab->glink_eh_frame->contents;
11750 if (val + 0x80000000 > 0xffffffff)
11751 {
11752 info->callbacks->einfo
11753 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
11754 htab->glink->name);
11755 return FALSE;
11756 }
11757 bfd_put_32 (htab->elf.dynobj, val, p);
11758 p += 4;
11759 /* .glink size. */
11760 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
11761 p += 4;
11762 /* Augmentation. */
11763 p += 1;
11764
11765 *p++ = DW_CFA_advance_loc + 1;
11766 *p++ = DW_CFA_register;
11767 *p++ = 65;
11768 *p++ = 12;
11769 *p++ = DW_CFA_advance_loc + 4;
11770 *p++ = DW_CFA_restore_extended;
11771 *p++ = 65;
11772 }
11773 htab->glink_eh_frame->size = p - htab->glink_eh_frame->contents;
11774 }
11775
11776 /* Build the stubs as directed by the stub hash table. */
11777 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11778
11779 if (htab->relbrlt != NULL)
11780 htab->relbrlt->reloc_count = 0;
11781
11782 for (stub_sec = htab->stub_bfd->sections;
11783 stub_sec != NULL;
11784 stub_sec = stub_sec->next)
11785 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11786 {
11787 stub_sec_count += 1;
11788 if (stub_sec->rawsize != stub_sec->size)
11789 break;
11790 }
11791
11792 if (stub_sec != NULL
11793 || htab->glink->rawsize != htab->glink->size
11794 || (htab->glink_eh_frame != NULL
11795 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
11796 {
11797 htab->stub_error = TRUE;
11798 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
11799 }
11800
11801 if (htab->stub_error)
11802 return FALSE;
11803
11804 if (stats != NULL)
11805 {
11806 *stats = bfd_malloc (500);
11807 if (*stats == NULL)
11808 return FALSE;
11809
11810 sprintf (*stats, _("linker stubs in %u group%s\n"
11811 " branch %lu\n"
11812 " toc adjust %lu\n"
11813 " long branch %lu\n"
11814 " long toc adj %lu\n"
11815 " plt call %lu"),
11816 stub_sec_count,
11817 stub_sec_count == 1 ? "" : "s",
11818 htab->stub_count[ppc_stub_long_branch - 1],
11819 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11820 htab->stub_count[ppc_stub_plt_branch - 1],
11821 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11822 htab->stub_count[ppc_stub_plt_call - 1]);
11823 }
11824 return TRUE;
11825 }
11826
11827 /* This function undoes the changes made by add_symbol_adjust. */
11828
11829 static bfd_boolean
11830 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11831 {
11832 struct ppc_link_hash_entry *eh;
11833
11834 if (h->root.type == bfd_link_hash_indirect)
11835 return TRUE;
11836
11837 eh = (struct ppc_link_hash_entry *) h;
11838 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11839 return TRUE;
11840
11841 eh->elf.root.type = bfd_link_hash_undefined;
11842 return TRUE;
11843 }
11844
11845 void
11846 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11847 {
11848 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11849
11850 if (htab != NULL)
11851 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11852 }
11853
11854 /* What to do when ld finds relocations against symbols defined in
11855 discarded sections. */
11856
11857 static unsigned int
11858 ppc64_elf_action_discarded (asection *sec)
11859 {
11860 if (strcmp (".opd", sec->name) == 0)
11861 return 0;
11862
11863 if (strcmp (".toc", sec->name) == 0)
11864 return 0;
11865
11866 if (strcmp (".toc1", sec->name) == 0)
11867 return 0;
11868
11869 return _bfd_elf_default_action_discarded (sec);
11870 }
11871
11872 /* The RELOCATE_SECTION function is called by the ELF backend linker
11873 to handle the relocations for a section.
11874
11875 The relocs are always passed as Rela structures; if the section
11876 actually uses Rel structures, the r_addend field will always be
11877 zero.
11878
11879 This function is responsible for adjust the section contents as
11880 necessary, and (if using Rela relocs and generating a
11881 relocatable output file) adjusting the reloc addend as
11882 necessary.
11883
11884 This function does not have to worry about setting the reloc
11885 address or the reloc symbol index.
11886
11887 LOCAL_SYMS is a pointer to the swapped in local symbols.
11888
11889 LOCAL_SECTIONS is an array giving the section in the input file
11890 corresponding to the st_shndx field of each local symbol.
11891
11892 The global hash table entry for the global symbols can be found
11893 via elf_sym_hashes (input_bfd).
11894
11895 When generating relocatable output, this function must handle
11896 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11897 going to be the section symbol corresponding to the output
11898 section, which means that the addend must be adjusted
11899 accordingly. */
11900
11901 static bfd_boolean
11902 ppc64_elf_relocate_section (bfd *output_bfd,
11903 struct bfd_link_info *info,
11904 bfd *input_bfd,
11905 asection *input_section,
11906 bfd_byte *contents,
11907 Elf_Internal_Rela *relocs,
11908 Elf_Internal_Sym *local_syms,
11909 asection **local_sections)
11910 {
11911 struct ppc_link_hash_table *htab;
11912 Elf_Internal_Shdr *symtab_hdr;
11913 struct elf_link_hash_entry **sym_hashes;
11914 Elf_Internal_Rela *rel;
11915 Elf_Internal_Rela *relend;
11916 Elf_Internal_Rela outrel;
11917 bfd_byte *loc;
11918 struct got_entry **local_got_ents;
11919 bfd_vma TOCstart;
11920 bfd_boolean ret = TRUE;
11921 bfd_boolean is_opd;
11922 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11923 bfd_boolean is_power4 = FALSE;
11924 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11925
11926 /* Initialize howto table if needed. */
11927 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11928 ppc_howto_init ();
11929
11930 htab = ppc_hash_table (info);
11931 if (htab == NULL)
11932 return FALSE;
11933
11934 /* Don't relocate stub sections. */
11935 if (input_section->owner == htab->stub_bfd)
11936 return TRUE;
11937
11938 BFD_ASSERT (is_ppc64_elf (input_bfd));
11939
11940 local_got_ents = elf_local_got_ents (input_bfd);
11941 TOCstart = elf_gp (output_bfd);
11942 symtab_hdr = &elf_symtab_hdr (input_bfd);
11943 sym_hashes = elf_sym_hashes (input_bfd);
11944 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11945
11946 rel = relocs;
11947 relend = relocs + input_section->reloc_count;
11948 for (; rel < relend; rel++)
11949 {
11950 enum elf_ppc64_reloc_type r_type;
11951 bfd_vma addend, orig_addend;
11952 bfd_reloc_status_type r;
11953 Elf_Internal_Sym *sym;
11954 asection *sec;
11955 struct elf_link_hash_entry *h_elf;
11956 struct ppc_link_hash_entry *h;
11957 struct ppc_link_hash_entry *fdh;
11958 const char *sym_name;
11959 unsigned long r_symndx, toc_symndx;
11960 bfd_vma toc_addend;
11961 unsigned char tls_mask, tls_gd, tls_type;
11962 unsigned char sym_type;
11963 bfd_vma relocation;
11964 bfd_boolean unresolved_reloc;
11965 bfd_boolean warned;
11966 unsigned int insn;
11967 unsigned int mask;
11968 struct ppc_stub_hash_entry *stub_entry;
11969 bfd_vma max_br_offset;
11970 bfd_vma from;
11971
11972 r_type = ELF64_R_TYPE (rel->r_info);
11973 r_symndx = ELF64_R_SYM (rel->r_info);
11974
11975 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11976 symbol of the previous ADDR64 reloc. The symbol gives us the
11977 proper TOC base to use. */
11978 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11979 && rel != relocs
11980 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11981 && is_opd)
11982 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11983
11984 sym = NULL;
11985 sec = NULL;
11986 h_elf = NULL;
11987 sym_name = NULL;
11988 unresolved_reloc = FALSE;
11989 warned = FALSE;
11990 orig_addend = rel->r_addend;
11991
11992 if (r_symndx < symtab_hdr->sh_info)
11993 {
11994 /* It's a local symbol. */
11995 struct _opd_sec_data *opd;
11996
11997 sym = local_syms + r_symndx;
11998 sec = local_sections[r_symndx];
11999 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12000 sym_type = ELF64_ST_TYPE (sym->st_info);
12001 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12002 opd = get_opd_info (sec);
12003 if (opd != NULL && opd->adjust != NULL)
12004 {
12005 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12006 if (adjust == -1)
12007 relocation = 0;
12008 else
12009 {
12010 /* If this is a relocation against the opd section sym
12011 and we have edited .opd, adjust the reloc addend so
12012 that ld -r and ld --emit-relocs output is correct.
12013 If it is a reloc against some other .opd symbol,
12014 then the symbol value will be adjusted later. */
12015 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12016 rel->r_addend += adjust;
12017 else
12018 relocation += adjust;
12019 }
12020 }
12021 }
12022 else
12023 {
12024 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12025 r_symndx, symtab_hdr, sym_hashes,
12026 h_elf, sec, relocation,
12027 unresolved_reloc, warned);
12028 sym_name = h_elf->root.root.string;
12029 sym_type = h_elf->type;
12030 }
12031 h = (struct ppc_link_hash_entry *) h_elf;
12032
12033 if (sec != NULL && elf_discarded_section (sec))
12034 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12035 rel, relend,
12036 ppc64_elf_howto_table[r_type],
12037 contents);
12038
12039 if (info->relocatable)
12040 continue;
12041
12042 /* TLS optimizations. Replace instruction sequences and relocs
12043 based on information we collected in tls_optimize. We edit
12044 RELOCS so that --emit-relocs will output something sensible
12045 for the final instruction stream. */
12046 tls_mask = 0;
12047 tls_gd = 0;
12048 toc_symndx = 0;
12049 if (h != NULL)
12050 tls_mask = h->tls_mask;
12051 else if (local_got_ents != NULL)
12052 {
12053 struct plt_entry **local_plt = (struct plt_entry **)
12054 (local_got_ents + symtab_hdr->sh_info);
12055 unsigned char *lgot_masks = (unsigned char *)
12056 (local_plt + symtab_hdr->sh_info);
12057 tls_mask = lgot_masks[r_symndx];
12058 }
12059 if (tls_mask == 0
12060 && (r_type == R_PPC64_TLS
12061 || r_type == R_PPC64_TLSGD
12062 || r_type == R_PPC64_TLSLD))
12063 {
12064 /* Check for toc tls entries. */
12065 unsigned char *toc_tls;
12066
12067 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12068 &local_syms, rel, input_bfd))
12069 return FALSE;
12070
12071 if (toc_tls)
12072 tls_mask = *toc_tls;
12073 }
12074
12075 /* Check that tls relocs are used with tls syms, and non-tls
12076 relocs are used with non-tls syms. */
12077 if (r_symndx != STN_UNDEF
12078 && r_type != R_PPC64_NONE
12079 && (h == NULL
12080 || h->elf.root.type == bfd_link_hash_defined
12081 || h->elf.root.type == bfd_link_hash_defweak)
12082 && (IS_PPC64_TLS_RELOC (r_type)
12083 != (sym_type == STT_TLS
12084 || (sym_type == STT_SECTION
12085 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12086 {
12087 if (tls_mask != 0
12088 && (r_type == R_PPC64_TLS
12089 || r_type == R_PPC64_TLSGD
12090 || r_type == R_PPC64_TLSLD))
12091 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12092 ;
12093 else
12094 info->callbacks->einfo
12095 (!IS_PPC64_TLS_RELOC (r_type)
12096 ? _("%P: %H: %s used with TLS symbol %s\n")
12097 : _("%P: %H: %s used with non-TLS symbol %s\n"),
12098 input_bfd, input_section, rel->r_offset,
12099 ppc64_elf_howto_table[r_type]->name,
12100 sym_name);
12101 }
12102
12103 /* Ensure reloc mapping code below stays sane. */
12104 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12105 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12106 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12107 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12108 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12109 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12110 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12111 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12112 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12113 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12114 abort ();
12115
12116 switch (r_type)
12117 {
12118 default:
12119 break;
12120
12121 case R_PPC64_LO_DS_OPT:
12122 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12123 if ((insn & (0x3f << 26)) != 58u << 26)
12124 abort ();
12125 insn += (14u << 26) - (58u << 26);
12126 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12127 r_type = R_PPC64_TOC16_LO;
12128 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12129 break;
12130
12131 case R_PPC64_TOC16:
12132 case R_PPC64_TOC16_LO:
12133 case R_PPC64_TOC16_DS:
12134 case R_PPC64_TOC16_LO_DS:
12135 {
12136 /* Check for toc tls entries. */
12137 unsigned char *toc_tls;
12138 int retval;
12139
12140 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12141 &local_syms, rel, input_bfd);
12142 if (retval == 0)
12143 return FALSE;
12144
12145 if (toc_tls)
12146 {
12147 tls_mask = *toc_tls;
12148 if (r_type == R_PPC64_TOC16_DS
12149 || r_type == R_PPC64_TOC16_LO_DS)
12150 {
12151 if (tls_mask != 0
12152 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12153 goto toctprel;
12154 }
12155 else
12156 {
12157 /* If we found a GD reloc pair, then we might be
12158 doing a GD->IE transition. */
12159 if (retval == 2)
12160 {
12161 tls_gd = TLS_TPRELGD;
12162 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12163 goto tls_ldgd_opt;
12164 }
12165 else if (retval == 3)
12166 {
12167 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12168 goto tls_ldgd_opt;
12169 }
12170 }
12171 }
12172 }
12173 break;
12174
12175 case R_PPC64_GOT_TPREL16_HI:
12176 case R_PPC64_GOT_TPREL16_HA:
12177 if (tls_mask != 0
12178 && (tls_mask & TLS_TPREL) == 0)
12179 {
12180 rel->r_offset -= d_offset;
12181 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12182 r_type = R_PPC64_NONE;
12183 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12184 }
12185 break;
12186
12187 case R_PPC64_GOT_TPREL16_DS:
12188 case R_PPC64_GOT_TPREL16_LO_DS:
12189 if (tls_mask != 0
12190 && (tls_mask & TLS_TPREL) == 0)
12191 {
12192 toctprel:
12193 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12194 insn &= 31 << 21;
12195 insn |= 0x3c0d0000; /* addis 0,13,0 */
12196 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12197 r_type = R_PPC64_TPREL16_HA;
12198 if (toc_symndx != 0)
12199 {
12200 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12201 rel->r_addend = toc_addend;
12202 /* We changed the symbol. Start over in order to
12203 get h, sym, sec etc. right. */
12204 rel--;
12205 continue;
12206 }
12207 else
12208 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12209 }
12210 break;
12211
12212 case R_PPC64_TLS:
12213 if (tls_mask != 0
12214 && (tls_mask & TLS_TPREL) == 0)
12215 {
12216 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12217 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12218 if (insn == 0)
12219 abort ();
12220 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12221 /* Was PPC64_TLS which sits on insn boundary, now
12222 PPC64_TPREL16_LO which is at low-order half-word. */
12223 rel->r_offset += d_offset;
12224 r_type = R_PPC64_TPREL16_LO;
12225 if (toc_symndx != 0)
12226 {
12227 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12228 rel->r_addend = toc_addend;
12229 /* We changed the symbol. Start over in order to
12230 get h, sym, sec etc. right. */
12231 rel--;
12232 continue;
12233 }
12234 else
12235 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12236 }
12237 break;
12238
12239 case R_PPC64_GOT_TLSGD16_HI:
12240 case R_PPC64_GOT_TLSGD16_HA:
12241 tls_gd = TLS_TPRELGD;
12242 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12243 goto tls_gdld_hi;
12244 break;
12245
12246 case R_PPC64_GOT_TLSLD16_HI:
12247 case R_PPC64_GOT_TLSLD16_HA:
12248 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12249 {
12250 tls_gdld_hi:
12251 if ((tls_mask & tls_gd) != 0)
12252 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12253 + R_PPC64_GOT_TPREL16_DS);
12254 else
12255 {
12256 rel->r_offset -= d_offset;
12257 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12258 r_type = R_PPC64_NONE;
12259 }
12260 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12261 }
12262 break;
12263
12264 case R_PPC64_GOT_TLSGD16:
12265 case R_PPC64_GOT_TLSGD16_LO:
12266 tls_gd = TLS_TPRELGD;
12267 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12268 goto tls_ldgd_opt;
12269 break;
12270
12271 case R_PPC64_GOT_TLSLD16:
12272 case R_PPC64_GOT_TLSLD16_LO:
12273 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12274 {
12275 unsigned int insn1, insn2, insn3;
12276 bfd_vma offset;
12277
12278 tls_ldgd_opt:
12279 offset = (bfd_vma) -1;
12280 /* If not using the newer R_PPC64_TLSGD/LD to mark
12281 __tls_get_addr calls, we must trust that the call
12282 stays with its arg setup insns, ie. that the next
12283 reloc is the __tls_get_addr call associated with
12284 the current reloc. Edit both insns. */
12285 if (input_section->has_tls_get_addr_call
12286 && rel + 1 < relend
12287 && branch_reloc_hash_match (input_bfd, rel + 1,
12288 htab->tls_get_addr,
12289 htab->tls_get_addr_fd))
12290 offset = rel[1].r_offset;
12291 if ((tls_mask & tls_gd) != 0)
12292 {
12293 /* IE */
12294 insn1 = bfd_get_32 (output_bfd,
12295 contents + rel->r_offset - d_offset);
12296 insn1 &= (1 << 26) - (1 << 2);
12297 insn1 |= 58 << 26; /* ld */
12298 insn2 = 0x7c636a14; /* add 3,3,13 */
12299 if (offset != (bfd_vma) -1)
12300 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12301 if ((tls_mask & TLS_EXPLICIT) == 0)
12302 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12303 + R_PPC64_GOT_TPREL16_DS);
12304 else
12305 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12306 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12307 }
12308 else
12309 {
12310 /* LE */
12311 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12312 insn2 = 0x38630000; /* addi 3,3,0 */
12313 if (tls_gd == 0)
12314 {
12315 /* Was an LD reloc. */
12316 if (toc_symndx)
12317 sec = local_sections[toc_symndx];
12318 for (r_symndx = 0;
12319 r_symndx < symtab_hdr->sh_info;
12320 r_symndx++)
12321 if (local_sections[r_symndx] == sec)
12322 break;
12323 if (r_symndx >= symtab_hdr->sh_info)
12324 r_symndx = STN_UNDEF;
12325 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12326 if (r_symndx != STN_UNDEF)
12327 rel->r_addend -= (local_syms[r_symndx].st_value
12328 + sec->output_offset
12329 + sec->output_section->vma);
12330 }
12331 else if (toc_symndx != 0)
12332 {
12333 r_symndx = toc_symndx;
12334 rel->r_addend = toc_addend;
12335 }
12336 r_type = R_PPC64_TPREL16_HA;
12337 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12338 if (offset != (bfd_vma) -1)
12339 {
12340 rel[1].r_info = ELF64_R_INFO (r_symndx,
12341 R_PPC64_TPREL16_LO);
12342 rel[1].r_offset = offset + d_offset;
12343 rel[1].r_addend = rel->r_addend;
12344 }
12345 }
12346 bfd_put_32 (output_bfd, insn1,
12347 contents + rel->r_offset - d_offset);
12348 if (offset != (bfd_vma) -1)
12349 {
12350 insn3 = bfd_get_32 (output_bfd,
12351 contents + offset + 4);
12352 if (insn3 == NOP
12353 || insn3 == CROR_151515 || insn3 == CROR_313131)
12354 {
12355 rel[1].r_offset += 4;
12356 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12357 insn2 = NOP;
12358 }
12359 bfd_put_32 (output_bfd, insn2, contents + offset);
12360 }
12361 if ((tls_mask & tls_gd) == 0
12362 && (tls_gd == 0 || toc_symndx != 0))
12363 {
12364 /* We changed the symbol. Start over in order
12365 to get h, sym, sec etc. right. */
12366 rel--;
12367 continue;
12368 }
12369 }
12370 break;
12371
12372 case R_PPC64_TLSGD:
12373 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12374 {
12375 unsigned int insn2, insn3;
12376 bfd_vma offset = rel->r_offset;
12377
12378 if ((tls_mask & TLS_TPRELGD) != 0)
12379 {
12380 /* IE */
12381 r_type = R_PPC64_NONE;
12382 insn2 = 0x7c636a14; /* add 3,3,13 */
12383 }
12384 else
12385 {
12386 /* LE */
12387 if (toc_symndx != 0)
12388 {
12389 r_symndx = toc_symndx;
12390 rel->r_addend = toc_addend;
12391 }
12392 r_type = R_PPC64_TPREL16_LO;
12393 rel->r_offset = offset + d_offset;
12394 insn2 = 0x38630000; /* addi 3,3,0 */
12395 }
12396 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12397 /* Zap the reloc on the _tls_get_addr call too. */
12398 BFD_ASSERT (offset == rel[1].r_offset);
12399 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12400 insn3 = bfd_get_32 (output_bfd,
12401 contents + offset + 4);
12402 if (insn3 == NOP
12403 || insn3 == CROR_151515 || insn3 == CROR_313131)
12404 {
12405 rel->r_offset += 4;
12406 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12407 insn2 = NOP;
12408 }
12409 bfd_put_32 (output_bfd, insn2, contents + offset);
12410 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12411 {
12412 rel--;
12413 continue;
12414 }
12415 }
12416 break;
12417
12418 case R_PPC64_TLSLD:
12419 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12420 {
12421 unsigned int insn2, insn3;
12422 bfd_vma offset = rel->r_offset;
12423
12424 if (toc_symndx)
12425 sec = local_sections[toc_symndx];
12426 for (r_symndx = 0;
12427 r_symndx < symtab_hdr->sh_info;
12428 r_symndx++)
12429 if (local_sections[r_symndx] == sec)
12430 break;
12431 if (r_symndx >= symtab_hdr->sh_info)
12432 r_symndx = STN_UNDEF;
12433 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12434 if (r_symndx != STN_UNDEF)
12435 rel->r_addend -= (local_syms[r_symndx].st_value
12436 + sec->output_offset
12437 + sec->output_section->vma);
12438
12439 r_type = R_PPC64_TPREL16_LO;
12440 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12441 rel->r_offset = offset + d_offset;
12442 /* Zap the reloc on the _tls_get_addr call too. */
12443 BFD_ASSERT (offset == rel[1].r_offset);
12444 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12445 insn2 = 0x38630000; /* addi 3,3,0 */
12446 insn3 = bfd_get_32 (output_bfd,
12447 contents + offset + 4);
12448 if (insn3 == NOP
12449 || insn3 == CROR_151515 || insn3 == CROR_313131)
12450 {
12451 rel->r_offset += 4;
12452 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12453 insn2 = NOP;
12454 }
12455 bfd_put_32 (output_bfd, insn2, contents + offset);
12456 rel--;
12457 continue;
12458 }
12459 break;
12460
12461 case R_PPC64_DTPMOD64:
12462 if (rel + 1 < relend
12463 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12464 && rel[1].r_offset == rel->r_offset + 8)
12465 {
12466 if ((tls_mask & TLS_GD) == 0)
12467 {
12468 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12469 if ((tls_mask & TLS_TPRELGD) != 0)
12470 r_type = R_PPC64_TPREL64;
12471 else
12472 {
12473 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12474 r_type = R_PPC64_NONE;
12475 }
12476 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12477 }
12478 }
12479 else
12480 {
12481 if ((tls_mask & TLS_LD) == 0)
12482 {
12483 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12484 r_type = R_PPC64_NONE;
12485 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12486 }
12487 }
12488 break;
12489
12490 case R_PPC64_TPREL64:
12491 if ((tls_mask & TLS_TPREL) == 0)
12492 {
12493 r_type = R_PPC64_NONE;
12494 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12495 }
12496 break;
12497 }
12498
12499 /* Handle other relocations that tweak non-addend part of insn. */
12500 insn = 0;
12501 max_br_offset = 1 << 25;
12502 addend = rel->r_addend;
12503 switch (r_type)
12504 {
12505 default:
12506 break;
12507
12508 case R_PPC64_TOCSAVE:
12509 if (relocation + addend == (rel->r_offset
12510 + input_section->output_offset
12511 + input_section->output_section->vma)
12512 && tocsave_find (htab, NO_INSERT,
12513 &local_syms, rel, input_bfd))
12514 {
12515 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12516 if (insn == NOP
12517 || insn == CROR_151515 || insn == CROR_313131)
12518 bfd_put_32 (input_bfd, STD_R2_40R1,
12519 contents + rel->r_offset);
12520 }
12521 break;
12522
12523 /* Branch taken prediction relocations. */
12524 case R_PPC64_ADDR14_BRTAKEN:
12525 case R_PPC64_REL14_BRTAKEN:
12526 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12527 /* Fall thru. */
12528
12529 /* Branch not taken prediction relocations. */
12530 case R_PPC64_ADDR14_BRNTAKEN:
12531 case R_PPC64_REL14_BRNTAKEN:
12532 insn |= bfd_get_32 (output_bfd,
12533 contents + rel->r_offset) & ~(0x01 << 21);
12534 /* Fall thru. */
12535
12536 case R_PPC64_REL14:
12537 max_br_offset = 1 << 15;
12538 /* Fall thru. */
12539
12540 case R_PPC64_REL24:
12541 /* Calls to functions with a different TOC, such as calls to
12542 shared objects, need to alter the TOC pointer. This is
12543 done using a linkage stub. A REL24 branching to these
12544 linkage stubs needs to be followed by a nop, as the nop
12545 will be replaced with an instruction to restore the TOC
12546 base pointer. */
12547 fdh = h;
12548 if (h != NULL
12549 && h->oh != NULL
12550 && h->oh->is_func_descriptor)
12551 fdh = ppc_follow_link (h->oh);
12552 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12553 if (stub_entry != NULL
12554 && (stub_entry->stub_type == ppc_stub_plt_call
12555 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12556 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12557 {
12558 bfd_boolean can_plt_call = FALSE;
12559
12560 if (rel->r_offset + 8 <= input_section->size)
12561 {
12562 unsigned long nop;
12563 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12564 if (nop == NOP
12565 || nop == CROR_151515 || nop == CROR_313131)
12566 {
12567 if (h != NULL
12568 && (h == htab->tls_get_addr_fd
12569 || h == htab->tls_get_addr)
12570 && !htab->no_tls_get_addr_opt)
12571 {
12572 /* Special stub used, leave nop alone. */
12573 }
12574 else
12575 bfd_put_32 (input_bfd, LD_R2_40R1,
12576 contents + rel->r_offset + 4);
12577 can_plt_call = TRUE;
12578 }
12579 }
12580
12581 if (!can_plt_call)
12582 {
12583 if (stub_entry->stub_type == ppc_stub_plt_call)
12584 {
12585 /* If this is a plain branch rather than a branch
12586 and link, don't require a nop. However, don't
12587 allow tail calls in a shared library as they
12588 will result in r2 being corrupted. */
12589 unsigned long br;
12590 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12591 if (info->executable && (br & 1) == 0)
12592 can_plt_call = TRUE;
12593 else
12594 stub_entry = NULL;
12595 }
12596 else if (h != NULL
12597 && strcmp (h->elf.root.root.string,
12598 ".__libc_start_main") == 0)
12599 {
12600 /* Allow crt1 branch to go via a toc adjusting stub. */
12601 can_plt_call = TRUE;
12602 }
12603 else
12604 {
12605 if (strcmp (input_section->output_section->name,
12606 ".init") == 0
12607 || strcmp (input_section->output_section->name,
12608 ".fini") == 0)
12609 info->callbacks->einfo
12610 (_("%P: %H: automatic multiple TOCs "
12611 "not supported using your crt files; "
12612 "recompile with -mminimal-toc or upgrade gcc\n"),
12613 input_bfd, input_section, rel->r_offset);
12614 else
12615 info->callbacks->einfo
12616 (_("%P: %H: sibling call optimization to `%s' "
12617 "does not allow automatic multiple TOCs; "
12618 "recompile with -mminimal-toc or "
12619 "-fno-optimize-sibling-calls, "
12620 "or make `%s' extern\n"),
12621 input_bfd, input_section, rel->r_offset,
12622 sym_name,
12623 sym_name);
12624 bfd_set_error (bfd_error_bad_value);
12625 ret = FALSE;
12626 }
12627 }
12628
12629 if (can_plt_call
12630 && stub_entry->stub_type == ppc_stub_plt_call)
12631 unresolved_reloc = FALSE;
12632 }
12633
12634 if ((stub_entry == NULL
12635 || stub_entry->stub_type == ppc_stub_long_branch
12636 || stub_entry->stub_type == ppc_stub_plt_branch)
12637 && get_opd_info (sec) != NULL)
12638 {
12639 /* The branch destination is the value of the opd entry. */
12640 bfd_vma off = (relocation + addend
12641 - sec->output_section->vma
12642 - sec->output_offset);
12643 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12644 if (dest != (bfd_vma) -1)
12645 {
12646 relocation = dest;
12647 addend = 0;
12648 }
12649 }
12650
12651 /* If the branch is out of reach we ought to have a long
12652 branch stub. */
12653 from = (rel->r_offset
12654 + input_section->output_offset
12655 + input_section->output_section->vma);
12656
12657 if (stub_entry != NULL
12658 && (stub_entry->stub_type == ppc_stub_long_branch
12659 || stub_entry->stub_type == ppc_stub_plt_branch)
12660 && (r_type == R_PPC64_ADDR14_BRTAKEN
12661 || r_type == R_PPC64_ADDR14_BRNTAKEN
12662 || (relocation + addend - from + max_br_offset
12663 < 2 * max_br_offset)))
12664 /* Don't use the stub if this branch is in range. */
12665 stub_entry = NULL;
12666
12667 if (stub_entry != NULL)
12668 {
12669 /* Munge up the value and addend so that we call the stub
12670 rather than the procedure directly. */
12671 relocation = (stub_entry->stub_offset
12672 + stub_entry->stub_sec->output_offset
12673 + stub_entry->stub_sec->output_section->vma);
12674 addend = 0;
12675
12676 if (stub_entry->stub_type == ppc_stub_plt_call
12677 && rel + 1 < relend
12678 && rel[1].r_offset == rel->r_offset + 4
12679 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
12680 relocation += 4;
12681 }
12682
12683 if (insn != 0)
12684 {
12685 if (is_power4)
12686 {
12687 /* Set 'a' bit. This is 0b00010 in BO field for branch
12688 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12689 for branch on CTR insns (BO == 1a00t or 1a01t). */
12690 if ((insn & (0x14 << 21)) == (0x04 << 21))
12691 insn |= 0x02 << 21;
12692 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12693 insn |= 0x08 << 21;
12694 else
12695 break;
12696 }
12697 else
12698 {
12699 /* Invert 'y' bit if not the default. */
12700 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12701 insn ^= 0x01 << 21;
12702 }
12703
12704 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12705 }
12706
12707 /* NOP out calls to undefined weak functions.
12708 We can thus call a weak function without first
12709 checking whether the function is defined. */
12710 else if (h != NULL
12711 && h->elf.root.type == bfd_link_hash_undefweak
12712 && h->elf.dynindx == -1
12713 && r_type == R_PPC64_REL24
12714 && relocation == 0
12715 && addend == 0)
12716 {
12717 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12718 continue;
12719 }
12720 break;
12721 }
12722
12723 /* Set `addend'. */
12724 tls_type = 0;
12725 switch (r_type)
12726 {
12727 default:
12728 info->callbacks->einfo
12729 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
12730 input_bfd, (int) r_type, sym_name);
12731
12732 bfd_set_error (bfd_error_bad_value);
12733 ret = FALSE;
12734 continue;
12735
12736 case R_PPC64_NONE:
12737 case R_PPC64_TLS:
12738 case R_PPC64_TLSGD:
12739 case R_PPC64_TLSLD:
12740 case R_PPC64_TOCSAVE:
12741 case R_PPC64_GNU_VTINHERIT:
12742 case R_PPC64_GNU_VTENTRY:
12743 continue;
12744
12745 /* GOT16 relocations. Like an ADDR16 using the symbol's
12746 address in the GOT as relocation value instead of the
12747 symbol's value itself. Also, create a GOT entry for the
12748 symbol and put the symbol value there. */
12749 case R_PPC64_GOT_TLSGD16:
12750 case R_PPC64_GOT_TLSGD16_LO:
12751 case R_PPC64_GOT_TLSGD16_HI:
12752 case R_PPC64_GOT_TLSGD16_HA:
12753 tls_type = TLS_TLS | TLS_GD;
12754 goto dogot;
12755
12756 case R_PPC64_GOT_TLSLD16:
12757 case R_PPC64_GOT_TLSLD16_LO:
12758 case R_PPC64_GOT_TLSLD16_HI:
12759 case R_PPC64_GOT_TLSLD16_HA:
12760 tls_type = TLS_TLS | TLS_LD;
12761 goto dogot;
12762
12763 case R_PPC64_GOT_TPREL16_DS:
12764 case R_PPC64_GOT_TPREL16_LO_DS:
12765 case R_PPC64_GOT_TPREL16_HI:
12766 case R_PPC64_GOT_TPREL16_HA:
12767 tls_type = TLS_TLS | TLS_TPREL;
12768 goto dogot;
12769
12770 case R_PPC64_GOT_DTPREL16_DS:
12771 case R_PPC64_GOT_DTPREL16_LO_DS:
12772 case R_PPC64_GOT_DTPREL16_HI:
12773 case R_PPC64_GOT_DTPREL16_HA:
12774 tls_type = TLS_TLS | TLS_DTPREL;
12775 goto dogot;
12776
12777 case R_PPC64_GOT16:
12778 case R_PPC64_GOT16_LO:
12779 case R_PPC64_GOT16_HI:
12780 case R_PPC64_GOT16_HA:
12781 case R_PPC64_GOT16_DS:
12782 case R_PPC64_GOT16_LO_DS:
12783 dogot:
12784 {
12785 /* Relocation is to the entry for this symbol in the global
12786 offset table. */
12787 asection *got;
12788 bfd_vma *offp;
12789 bfd_vma off;
12790 unsigned long indx = 0;
12791 struct got_entry *ent;
12792
12793 if (tls_type == (TLS_TLS | TLS_LD)
12794 && (h == NULL
12795 || !h->elf.def_dynamic))
12796 ent = ppc64_tlsld_got (input_bfd);
12797 else
12798 {
12799
12800 if (h != NULL)
12801 {
12802 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12803 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12804 &h->elf)
12805 || (info->shared
12806 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12807 /* This is actually a static link, or it is a
12808 -Bsymbolic link and the symbol is defined
12809 locally, or the symbol was forced to be local
12810 because of a version file. */
12811 ;
12812 else
12813 {
12814 indx = h->elf.dynindx;
12815 unresolved_reloc = FALSE;
12816 }
12817 ent = h->elf.got.glist;
12818 }
12819 else
12820 {
12821 if (local_got_ents == NULL)
12822 abort ();
12823 ent = local_got_ents[r_symndx];
12824 }
12825
12826 for (; ent != NULL; ent = ent->next)
12827 if (ent->addend == orig_addend
12828 && ent->owner == input_bfd
12829 && ent->tls_type == tls_type)
12830 break;
12831 }
12832
12833 if (ent == NULL)
12834 abort ();
12835 if (ent->is_indirect)
12836 ent = ent->got.ent;
12837 offp = &ent->got.offset;
12838 got = ppc64_elf_tdata (ent->owner)->got;
12839 if (got == NULL)
12840 abort ();
12841
12842 /* The offset must always be a multiple of 8. We use the
12843 least significant bit to record whether we have already
12844 processed this entry. */
12845 off = *offp;
12846 if ((off & 1) != 0)
12847 off &= ~1;
12848 else
12849 {
12850 /* Generate relocs for the dynamic linker, except in
12851 the case of TLSLD where we'll use one entry per
12852 module. */
12853 asection *relgot;
12854 bfd_boolean ifunc;
12855
12856 *offp = off | 1;
12857 relgot = NULL;
12858 ifunc = (h != NULL
12859 ? h->elf.type == STT_GNU_IFUNC
12860 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12861 if ((info->shared || indx != 0)
12862 && (h == NULL
12863 || (tls_type == (TLS_TLS | TLS_LD)
12864 && !h->elf.def_dynamic)
12865 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12866 || h->elf.root.type != bfd_link_hash_undefweak))
12867 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12868 else if (ifunc)
12869 relgot = htab->reliplt;
12870 if (relgot != NULL)
12871 {
12872 outrel.r_offset = (got->output_section->vma
12873 + got->output_offset
12874 + off);
12875 outrel.r_addend = addend;
12876 if (tls_type & (TLS_LD | TLS_GD))
12877 {
12878 outrel.r_addend = 0;
12879 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12880 if (tls_type == (TLS_TLS | TLS_GD))
12881 {
12882 loc = relgot->contents;
12883 loc += (relgot->reloc_count++
12884 * sizeof (Elf64_External_Rela));
12885 bfd_elf64_swap_reloca_out (output_bfd,
12886 &outrel, loc);
12887 outrel.r_offset += 8;
12888 outrel.r_addend = addend;
12889 outrel.r_info
12890 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12891 }
12892 }
12893 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12894 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12895 else if (tls_type == (TLS_TLS | TLS_TPREL))
12896 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12897 else if (indx != 0)
12898 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12899 else
12900 {
12901 if (ifunc)
12902 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12903 else
12904 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12905
12906 /* Write the .got section contents for the sake
12907 of prelink. */
12908 loc = got->contents + off;
12909 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12910 loc);
12911 }
12912
12913 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12914 {
12915 outrel.r_addend += relocation;
12916 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12917 outrel.r_addend -= htab->elf.tls_sec->vma;
12918 }
12919 loc = relgot->contents;
12920 loc += (relgot->reloc_count++
12921 * sizeof (Elf64_External_Rela));
12922 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12923 }
12924
12925 /* Init the .got section contents here if we're not
12926 emitting a reloc. */
12927 else
12928 {
12929 relocation += addend;
12930 if (tls_type == (TLS_TLS | TLS_LD))
12931 relocation = 1;
12932 else if (tls_type != 0)
12933 {
12934 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12935 if (tls_type == (TLS_TLS | TLS_TPREL))
12936 relocation += DTP_OFFSET - TP_OFFSET;
12937
12938 if (tls_type == (TLS_TLS | TLS_GD))
12939 {
12940 bfd_put_64 (output_bfd, relocation,
12941 got->contents + off + 8);
12942 relocation = 1;
12943 }
12944 }
12945
12946 bfd_put_64 (output_bfd, relocation,
12947 got->contents + off);
12948 }
12949 }
12950
12951 if (off >= (bfd_vma) -2)
12952 abort ();
12953
12954 relocation = got->output_section->vma + got->output_offset + off;
12955 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12956 }
12957 break;
12958
12959 case R_PPC64_PLT16_HA:
12960 case R_PPC64_PLT16_HI:
12961 case R_PPC64_PLT16_LO:
12962 case R_PPC64_PLT32:
12963 case R_PPC64_PLT64:
12964 /* Relocation is to the entry for this symbol in the
12965 procedure linkage table. */
12966
12967 /* Resolve a PLT reloc against a local symbol directly,
12968 without using the procedure linkage table. */
12969 if (h == NULL)
12970 break;
12971
12972 /* It's possible that we didn't make a PLT entry for this
12973 symbol. This happens when statically linking PIC code,
12974 or when using -Bsymbolic. Go find a match if there is a
12975 PLT entry. */
12976 if (htab->plt != NULL)
12977 {
12978 struct plt_entry *ent;
12979 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12980 if (ent->addend == orig_addend
12981 && ent->plt.offset != (bfd_vma) -1)
12982 {
12983 relocation = (htab->plt->output_section->vma
12984 + htab->plt->output_offset
12985 + ent->plt.offset);
12986 unresolved_reloc = FALSE;
12987 }
12988 }
12989 break;
12990
12991 case R_PPC64_TOC:
12992 /* Relocation value is TOC base. */
12993 relocation = TOCstart;
12994 if (r_symndx == STN_UNDEF)
12995 relocation += htab->stub_group[input_section->id].toc_off;
12996 else if (unresolved_reloc)
12997 ;
12998 else if (sec != NULL && sec->id <= htab->top_id)
12999 relocation += htab->stub_group[sec->id].toc_off;
13000 else
13001 unresolved_reloc = TRUE;
13002 goto dodyn;
13003
13004 /* TOC16 relocs. We want the offset relative to the TOC base,
13005 which is the address of the start of the TOC plus 0x8000.
13006 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13007 in this order. */
13008 case R_PPC64_TOC16:
13009 case R_PPC64_TOC16_LO:
13010 case R_PPC64_TOC16_HI:
13011 case R_PPC64_TOC16_DS:
13012 case R_PPC64_TOC16_LO_DS:
13013 case R_PPC64_TOC16_HA:
13014 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13015 break;
13016
13017 /* Relocate against the beginning of the section. */
13018 case R_PPC64_SECTOFF:
13019 case R_PPC64_SECTOFF_LO:
13020 case R_PPC64_SECTOFF_HI:
13021 case R_PPC64_SECTOFF_DS:
13022 case R_PPC64_SECTOFF_LO_DS:
13023 case R_PPC64_SECTOFF_HA:
13024 if (sec != NULL)
13025 addend -= sec->output_section->vma;
13026 break;
13027
13028 case R_PPC64_REL16:
13029 case R_PPC64_REL16_LO:
13030 case R_PPC64_REL16_HI:
13031 case R_PPC64_REL16_HA:
13032 break;
13033
13034 case R_PPC64_REL14:
13035 case R_PPC64_REL14_BRNTAKEN:
13036 case R_PPC64_REL14_BRTAKEN:
13037 case R_PPC64_REL24:
13038 break;
13039
13040 case R_PPC64_TPREL16:
13041 case R_PPC64_TPREL16_LO:
13042 case R_PPC64_TPREL16_HI:
13043 case R_PPC64_TPREL16_HA:
13044 case R_PPC64_TPREL16_DS:
13045 case R_PPC64_TPREL16_LO_DS:
13046 case R_PPC64_TPREL16_HIGHER:
13047 case R_PPC64_TPREL16_HIGHERA:
13048 case R_PPC64_TPREL16_HIGHEST:
13049 case R_PPC64_TPREL16_HIGHESTA:
13050 if (h != NULL
13051 && h->elf.root.type == bfd_link_hash_undefweak
13052 && h->elf.dynindx == -1)
13053 {
13054 /* Make this relocation against an undefined weak symbol
13055 resolve to zero. This is really just a tweak, since
13056 code using weak externs ought to check that they are
13057 defined before using them. */
13058 bfd_byte *p = contents + rel->r_offset - d_offset;
13059
13060 insn = bfd_get_32 (output_bfd, p);
13061 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13062 if (insn != 0)
13063 bfd_put_32 (output_bfd, insn, p);
13064 break;
13065 }
13066 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13067 if (info->shared)
13068 /* The TPREL16 relocs shouldn't really be used in shared
13069 libs as they will result in DT_TEXTREL being set, but
13070 support them anyway. */
13071 goto dodyn;
13072 break;
13073
13074 case R_PPC64_DTPREL16:
13075 case R_PPC64_DTPREL16_LO:
13076 case R_PPC64_DTPREL16_HI:
13077 case R_PPC64_DTPREL16_HA:
13078 case R_PPC64_DTPREL16_DS:
13079 case R_PPC64_DTPREL16_LO_DS:
13080 case R_PPC64_DTPREL16_HIGHER:
13081 case R_PPC64_DTPREL16_HIGHERA:
13082 case R_PPC64_DTPREL16_HIGHEST:
13083 case R_PPC64_DTPREL16_HIGHESTA:
13084 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13085 break;
13086
13087 case R_PPC64_DTPMOD64:
13088 relocation = 1;
13089 addend = 0;
13090 goto dodyn;
13091
13092 case R_PPC64_TPREL64:
13093 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13094 goto dodyn;
13095
13096 case R_PPC64_DTPREL64:
13097 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13098 /* Fall thru */
13099
13100 /* Relocations that may need to be propagated if this is a
13101 dynamic object. */
13102 case R_PPC64_REL30:
13103 case R_PPC64_REL32:
13104 case R_PPC64_REL64:
13105 case R_PPC64_ADDR14:
13106 case R_PPC64_ADDR14_BRNTAKEN:
13107 case R_PPC64_ADDR14_BRTAKEN:
13108 case R_PPC64_ADDR16:
13109 case R_PPC64_ADDR16_DS:
13110 case R_PPC64_ADDR16_HA:
13111 case R_PPC64_ADDR16_HI:
13112 case R_PPC64_ADDR16_HIGHER:
13113 case R_PPC64_ADDR16_HIGHERA:
13114 case R_PPC64_ADDR16_HIGHEST:
13115 case R_PPC64_ADDR16_HIGHESTA:
13116 case R_PPC64_ADDR16_LO:
13117 case R_PPC64_ADDR16_LO_DS:
13118 case R_PPC64_ADDR24:
13119 case R_PPC64_ADDR32:
13120 case R_PPC64_ADDR64:
13121 case R_PPC64_UADDR16:
13122 case R_PPC64_UADDR32:
13123 case R_PPC64_UADDR64:
13124 dodyn:
13125 if ((input_section->flags & SEC_ALLOC) == 0)
13126 break;
13127
13128 if (NO_OPD_RELOCS && is_opd)
13129 break;
13130
13131 if ((info->shared
13132 && (h == NULL
13133 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13134 || h->elf.root.type != bfd_link_hash_undefweak)
13135 && (must_be_dyn_reloc (info, r_type)
13136 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13137 || (ELIMINATE_COPY_RELOCS
13138 && !info->shared
13139 && h != NULL
13140 && h->elf.dynindx != -1
13141 && !h->elf.non_got_ref
13142 && !h->elf.def_regular)
13143 || (!info->shared
13144 && (h != NULL
13145 ? h->elf.type == STT_GNU_IFUNC
13146 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13147 {
13148 bfd_boolean skip, relocate;
13149 asection *sreloc;
13150 bfd_vma out_off;
13151
13152 /* When generating a dynamic object, these relocations
13153 are copied into the output file to be resolved at run
13154 time. */
13155
13156 skip = FALSE;
13157 relocate = FALSE;
13158
13159 out_off = _bfd_elf_section_offset (output_bfd, info,
13160 input_section, rel->r_offset);
13161 if (out_off == (bfd_vma) -1)
13162 skip = TRUE;
13163 else if (out_off == (bfd_vma) -2)
13164 skip = TRUE, relocate = TRUE;
13165 out_off += (input_section->output_section->vma
13166 + input_section->output_offset);
13167 outrel.r_offset = out_off;
13168 outrel.r_addend = rel->r_addend;
13169
13170 /* Optimize unaligned reloc use. */
13171 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13172 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13173 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13174 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13175 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13176 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13177 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13178 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13179 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13180
13181 if (skip)
13182 memset (&outrel, 0, sizeof outrel);
13183 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13184 && !is_opd
13185 && r_type != R_PPC64_TOC)
13186 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13187 else
13188 {
13189 /* This symbol is local, or marked to become local,
13190 or this is an opd section reloc which must point
13191 at a local function. */
13192 outrel.r_addend += relocation;
13193 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13194 {
13195 if (is_opd && h != NULL)
13196 {
13197 /* Lie about opd entries. This case occurs
13198 when building shared libraries and we
13199 reference a function in another shared
13200 lib. The same thing happens for a weak
13201 definition in an application that's
13202 overridden by a strong definition in a
13203 shared lib. (I believe this is a generic
13204 bug in binutils handling of weak syms.)
13205 In these cases we won't use the opd
13206 entry in this lib. */
13207 unresolved_reloc = FALSE;
13208 }
13209 if (!is_opd
13210 && r_type == R_PPC64_ADDR64
13211 && (h != NULL
13212 ? h->elf.type == STT_GNU_IFUNC
13213 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13214 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13215 else
13216 {
13217 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13218
13219 /* We need to relocate .opd contents for ld.so.
13220 Prelink also wants simple and consistent rules
13221 for relocs. This make all RELATIVE relocs have
13222 *r_offset equal to r_addend. */
13223 relocate = TRUE;
13224 }
13225 }
13226 else
13227 {
13228 long indx = 0;
13229
13230 if (h != NULL
13231 ? h->elf.type == STT_GNU_IFUNC
13232 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13233 {
13234 info->callbacks->einfo
13235 (_("%P: %H: relocation %s for indirect "
13236 "function %s unsupported\n"),
13237 input_bfd, input_section, rel->r_offset,
13238 ppc64_elf_howto_table[r_type]->name,
13239 sym_name);
13240 ret = FALSE;
13241 }
13242 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13243 ;
13244 else if (sec == NULL || sec->owner == NULL)
13245 {
13246 bfd_set_error (bfd_error_bad_value);
13247 return FALSE;
13248 }
13249 else
13250 {
13251 asection *osec;
13252
13253 osec = sec->output_section;
13254 indx = elf_section_data (osec)->dynindx;
13255
13256 if (indx == 0)
13257 {
13258 if ((osec->flags & SEC_READONLY) == 0
13259 && htab->elf.data_index_section != NULL)
13260 osec = htab->elf.data_index_section;
13261 else
13262 osec = htab->elf.text_index_section;
13263 indx = elf_section_data (osec)->dynindx;
13264 }
13265 BFD_ASSERT (indx != 0);
13266
13267 /* We are turning this relocation into one
13268 against a section symbol, so subtract out
13269 the output section's address but not the
13270 offset of the input section in the output
13271 section. */
13272 outrel.r_addend -= osec->vma;
13273 }
13274
13275 outrel.r_info = ELF64_R_INFO (indx, r_type);
13276 }
13277 }
13278
13279 sreloc = elf_section_data (input_section)->sreloc;
13280 if (!htab->elf.dynamic_sections_created)
13281 sreloc = htab->reliplt;
13282 if (sreloc == NULL)
13283 abort ();
13284
13285 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13286 >= sreloc->size)
13287 abort ();
13288 loc = sreloc->contents;
13289 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13290 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13291
13292 /* If this reloc is against an external symbol, it will
13293 be computed at runtime, so there's no need to do
13294 anything now. However, for the sake of prelink ensure
13295 that the section contents are a known value. */
13296 if (! relocate)
13297 {
13298 unresolved_reloc = FALSE;
13299 /* The value chosen here is quite arbitrary as ld.so
13300 ignores section contents except for the special
13301 case of .opd where the contents might be accessed
13302 before relocation. Choose zero, as that won't
13303 cause reloc overflow. */
13304 relocation = 0;
13305 addend = 0;
13306 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13307 to improve backward compatibility with older
13308 versions of ld. */
13309 if (r_type == R_PPC64_ADDR64)
13310 addend = outrel.r_addend;
13311 /* Adjust pc_relative relocs to have zero in *r_offset. */
13312 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13313 addend = (input_section->output_section->vma
13314 + input_section->output_offset
13315 + rel->r_offset);
13316 }
13317 }
13318 break;
13319
13320 case R_PPC64_COPY:
13321 case R_PPC64_GLOB_DAT:
13322 case R_PPC64_JMP_SLOT:
13323 case R_PPC64_JMP_IREL:
13324 case R_PPC64_RELATIVE:
13325 /* We shouldn't ever see these dynamic relocs in relocatable
13326 files. */
13327 /* Fall through. */
13328
13329 case R_PPC64_PLTGOT16:
13330 case R_PPC64_PLTGOT16_DS:
13331 case R_PPC64_PLTGOT16_HA:
13332 case R_PPC64_PLTGOT16_HI:
13333 case R_PPC64_PLTGOT16_LO:
13334 case R_PPC64_PLTGOT16_LO_DS:
13335 case R_PPC64_PLTREL32:
13336 case R_PPC64_PLTREL64:
13337 /* These ones haven't been implemented yet. */
13338
13339 info->callbacks->einfo
13340 (_("%P: %B: relocation %s is not supported for symbol %s\n"),
13341 input_bfd,
13342 ppc64_elf_howto_table[r_type]->name, sym_name);
13343
13344 bfd_set_error (bfd_error_invalid_operation);
13345 ret = FALSE;
13346 continue;
13347 }
13348
13349 /* Multi-instruction sequences that access the TOC can be
13350 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13351 to nop; addi rb,r2,x; */
13352 switch (r_type)
13353 {
13354 default:
13355 break;
13356
13357 case R_PPC64_GOT_TLSLD16_HI:
13358 case R_PPC64_GOT_TLSGD16_HI:
13359 case R_PPC64_GOT_TPREL16_HI:
13360 case R_PPC64_GOT_DTPREL16_HI:
13361 case R_PPC64_GOT16_HI:
13362 case R_PPC64_TOC16_HI:
13363 /* These relocs would only be useful if building up an
13364 offset to later add to r2, perhaps in an indexed
13365 addressing mode instruction. Don't try to optimize.
13366 Unfortunately, the possibility of someone building up an
13367 offset like this or even with the HA relocs, means that
13368 we need to check the high insn when optimizing the low
13369 insn. */
13370 break;
13371
13372 case R_PPC64_GOT_TLSLD16_HA:
13373 case R_PPC64_GOT_TLSGD16_HA:
13374 case R_PPC64_GOT_TPREL16_HA:
13375 case R_PPC64_GOT_DTPREL16_HA:
13376 case R_PPC64_GOT16_HA:
13377 case R_PPC64_TOC16_HA:
13378 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13379 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13380 {
13381 bfd_byte *p = contents + (rel->r_offset & ~3);
13382 bfd_put_32 (input_bfd, NOP, p);
13383 }
13384 break;
13385
13386 case R_PPC64_GOT_TLSLD16_LO:
13387 case R_PPC64_GOT_TLSGD16_LO:
13388 case R_PPC64_GOT_TPREL16_LO_DS:
13389 case R_PPC64_GOT_DTPREL16_LO_DS:
13390 case R_PPC64_GOT16_LO:
13391 case R_PPC64_GOT16_LO_DS:
13392 case R_PPC64_TOC16_LO:
13393 case R_PPC64_TOC16_LO_DS:
13394 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13395 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13396 {
13397 bfd_byte *p = contents + (rel->r_offset & ~3);
13398 insn = bfd_get_32 (input_bfd, p);
13399 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13400 {
13401 /* Transform addic to addi when we change reg. */
13402 insn &= ~((0x3f << 26) | (0x1f << 16));
13403 insn |= (14u << 26) | (2 << 16);
13404 }
13405 else
13406 {
13407 insn &= ~(0x1f << 16);
13408 insn |= 2 << 16;
13409 }
13410 bfd_put_32 (input_bfd, insn, p);
13411 }
13412 break;
13413 }
13414
13415 /* Do any further special processing. */
13416 switch (r_type)
13417 {
13418 default:
13419 break;
13420
13421 case R_PPC64_ADDR16_HA:
13422 case R_PPC64_REL16_HA:
13423 case R_PPC64_ADDR16_HIGHERA:
13424 case R_PPC64_ADDR16_HIGHESTA:
13425 case R_PPC64_TOC16_HA:
13426 case R_PPC64_SECTOFF_HA:
13427 case R_PPC64_TPREL16_HA:
13428 case R_PPC64_DTPREL16_HA:
13429 case R_PPC64_TPREL16_HIGHER:
13430 case R_PPC64_TPREL16_HIGHERA:
13431 case R_PPC64_TPREL16_HIGHEST:
13432 case R_PPC64_TPREL16_HIGHESTA:
13433 case R_PPC64_DTPREL16_HIGHER:
13434 case R_PPC64_DTPREL16_HIGHERA:
13435 case R_PPC64_DTPREL16_HIGHEST:
13436 case R_PPC64_DTPREL16_HIGHESTA:
13437 /* It's just possible that this symbol is a weak symbol
13438 that's not actually defined anywhere. In that case,
13439 'sec' would be NULL, and we should leave the symbol
13440 alone (it will be set to zero elsewhere in the link). */
13441 if (sec == NULL)
13442 break;
13443 /* Fall thru */
13444
13445 case R_PPC64_GOT16_HA:
13446 case R_PPC64_PLTGOT16_HA:
13447 case R_PPC64_PLT16_HA:
13448 case R_PPC64_GOT_TLSGD16_HA:
13449 case R_PPC64_GOT_TLSLD16_HA:
13450 case R_PPC64_GOT_TPREL16_HA:
13451 case R_PPC64_GOT_DTPREL16_HA:
13452 /* Add 0x10000 if sign bit in 0:15 is set.
13453 Bits 0:15 are not used. */
13454 addend += 0x8000;
13455 break;
13456
13457 case R_PPC64_ADDR16_DS:
13458 case R_PPC64_ADDR16_LO_DS:
13459 case R_PPC64_GOT16_DS:
13460 case R_PPC64_GOT16_LO_DS:
13461 case R_PPC64_PLT16_LO_DS:
13462 case R_PPC64_SECTOFF_DS:
13463 case R_PPC64_SECTOFF_LO_DS:
13464 case R_PPC64_TOC16_DS:
13465 case R_PPC64_TOC16_LO_DS:
13466 case R_PPC64_PLTGOT16_DS:
13467 case R_PPC64_PLTGOT16_LO_DS:
13468 case R_PPC64_GOT_TPREL16_DS:
13469 case R_PPC64_GOT_TPREL16_LO_DS:
13470 case R_PPC64_GOT_DTPREL16_DS:
13471 case R_PPC64_GOT_DTPREL16_LO_DS:
13472 case R_PPC64_TPREL16_DS:
13473 case R_PPC64_TPREL16_LO_DS:
13474 case R_PPC64_DTPREL16_DS:
13475 case R_PPC64_DTPREL16_LO_DS:
13476 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13477 mask = 3;
13478 /* If this reloc is against an lq insn, then the value must be
13479 a multiple of 16. This is somewhat of a hack, but the
13480 "correct" way to do this by defining _DQ forms of all the
13481 _DS relocs bloats all reloc switches in this file. It
13482 doesn't seem to make much sense to use any of these relocs
13483 in data, so testing the insn should be safe. */
13484 if ((insn & (0x3f << 26)) == (56u << 26))
13485 mask = 15;
13486 if (((relocation + addend) & mask) != 0)
13487 {
13488 info->callbacks->einfo
13489 (_("%P: %H: error: %s not a multiple of %u\n"),
13490 input_bfd, input_section, rel->r_offset,
13491 ppc64_elf_howto_table[r_type]->name,
13492 mask + 1);
13493 bfd_set_error (bfd_error_bad_value);
13494 ret = FALSE;
13495 continue;
13496 }
13497 break;
13498 }
13499
13500 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13501 because such sections are not SEC_ALLOC and thus ld.so will
13502 not process them. */
13503 if (unresolved_reloc
13504 && !((input_section->flags & SEC_DEBUGGING) != 0
13505 && h->elf.def_dynamic)
13506 && _bfd_elf_section_offset (output_bfd, info, input_section,
13507 rel->r_offset) != (bfd_vma) -1)
13508 {
13509 info->callbacks->einfo
13510 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
13511 input_bfd, input_section, rel->r_offset,
13512 ppc64_elf_howto_table[(int) r_type]->name,
13513 h->elf.root.root.string);
13514 ret = FALSE;
13515 }
13516
13517 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13518 input_bfd,
13519 input_section,
13520 contents,
13521 rel->r_offset,
13522 relocation,
13523 addend);
13524
13525 if (r != bfd_reloc_ok)
13526 {
13527 if (sym_name == NULL)
13528 sym_name = "(null)";
13529 if (r == bfd_reloc_overflow)
13530 {
13531 if (warned)
13532 continue;
13533 if (h != NULL
13534 && h->elf.root.type == bfd_link_hash_undefweak
13535 && ppc64_elf_howto_table[r_type]->pc_relative)
13536 {
13537 /* Assume this is a call protected by other code that
13538 detects the symbol is undefined. If this is the case,
13539 we can safely ignore the overflow. If not, the
13540 program is hosed anyway, and a little warning isn't
13541 going to help. */
13542
13543 continue;
13544 }
13545
13546 if (!((*info->callbacks->reloc_overflow)
13547 (info, (h ? &h->elf.root : NULL), sym_name,
13548 ppc64_elf_howto_table[r_type]->name,
13549 orig_addend, input_bfd, input_section, rel->r_offset)))
13550 return FALSE;
13551 }
13552 else
13553 {
13554 info->callbacks->einfo
13555 (_("%P: %H: %s reloc against `%s': error %d\n"),
13556 input_bfd, input_section, rel->r_offset,
13557 ppc64_elf_howto_table[r_type]->name,
13558 sym_name,
13559 (int) r);
13560 ret = FALSE;
13561 }
13562 }
13563 }
13564
13565 /* If we're emitting relocations, then shortly after this function
13566 returns, reloc offsets and addends for this section will be
13567 adjusted. Worse, reloc symbol indices will be for the output
13568 file rather than the input. Save a copy of the relocs for
13569 opd_entry_value. */
13570 if (is_opd && (info->emitrelocations || info->relocatable))
13571 {
13572 bfd_size_type amt;
13573 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13574 rel = bfd_alloc (input_bfd, amt);
13575 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13576 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13577 if (rel == NULL)
13578 return FALSE;
13579 memcpy (rel, relocs, amt);
13580 }
13581 return ret;
13582 }
13583
13584 /* Adjust the value of any local symbols in opd sections. */
13585
13586 static int
13587 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13588 const char *name ATTRIBUTE_UNUSED,
13589 Elf_Internal_Sym *elfsym,
13590 asection *input_sec,
13591 struct elf_link_hash_entry *h)
13592 {
13593 struct _opd_sec_data *opd;
13594 long adjust;
13595 bfd_vma value;
13596
13597 if (h != NULL)
13598 return 1;
13599
13600 opd = get_opd_info (input_sec);
13601 if (opd == NULL || opd->adjust == NULL)
13602 return 1;
13603
13604 value = elfsym->st_value - input_sec->output_offset;
13605 if (!info->relocatable)
13606 value -= input_sec->output_section->vma;
13607
13608 adjust = opd->adjust[value / 8];
13609 if (adjust == -1)
13610 return 2;
13611
13612 elfsym->st_value += adjust;
13613 return 1;
13614 }
13615
13616 /* Finish up dynamic symbol handling. We set the contents of various
13617 dynamic sections here. */
13618
13619 static bfd_boolean
13620 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13621 struct bfd_link_info *info,
13622 struct elf_link_hash_entry *h,
13623 Elf_Internal_Sym *sym)
13624 {
13625 struct ppc_link_hash_table *htab;
13626 struct plt_entry *ent;
13627 Elf_Internal_Rela rela;
13628 bfd_byte *loc;
13629
13630 htab = ppc_hash_table (info);
13631 if (htab == NULL)
13632 return FALSE;
13633
13634 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13635 if (ent->plt.offset != (bfd_vma) -1)
13636 {
13637 /* This symbol has an entry in the procedure linkage
13638 table. Set it up. */
13639 if (!htab->elf.dynamic_sections_created
13640 || h->dynindx == -1)
13641 {
13642 BFD_ASSERT (h->type == STT_GNU_IFUNC
13643 && h->def_regular
13644 && (h->root.type == bfd_link_hash_defined
13645 || h->root.type == bfd_link_hash_defweak));
13646 rela.r_offset = (htab->iplt->output_section->vma
13647 + htab->iplt->output_offset
13648 + ent->plt.offset);
13649 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13650 rela.r_addend = (h->root.u.def.value
13651 + h->root.u.def.section->output_offset
13652 + h->root.u.def.section->output_section->vma
13653 + ent->addend);
13654 loc = (htab->reliplt->contents
13655 + (htab->reliplt->reloc_count++
13656 * sizeof (Elf64_External_Rela)));
13657 }
13658 else
13659 {
13660 rela.r_offset = (htab->plt->output_section->vma
13661 + htab->plt->output_offset
13662 + ent->plt.offset);
13663 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13664 rela.r_addend = ent->addend;
13665 loc = (htab->relplt->contents
13666 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13667 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13668 }
13669 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13670 }
13671
13672 if (h->needs_copy)
13673 {
13674 /* This symbol needs a copy reloc. Set it up. */
13675
13676 if (h->dynindx == -1
13677 || (h->root.type != bfd_link_hash_defined
13678 && h->root.type != bfd_link_hash_defweak)
13679 || htab->relbss == NULL)
13680 abort ();
13681
13682 rela.r_offset = (h->root.u.def.value
13683 + h->root.u.def.section->output_section->vma
13684 + h->root.u.def.section->output_offset);
13685 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13686 rela.r_addend = 0;
13687 loc = htab->relbss->contents;
13688 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13689 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13690 }
13691
13692 /* Mark some specially defined symbols as absolute. */
13693 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13694 sym->st_shndx = SHN_ABS;
13695
13696 return TRUE;
13697 }
13698
13699 /* Used to decide how to sort relocs in an optimal manner for the
13700 dynamic linker, before writing them out. */
13701
13702 static enum elf_reloc_type_class
13703 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13704 {
13705 enum elf_ppc64_reloc_type r_type;
13706
13707 r_type = ELF64_R_TYPE (rela->r_info);
13708 switch (r_type)
13709 {
13710 case R_PPC64_RELATIVE:
13711 return reloc_class_relative;
13712 case R_PPC64_JMP_SLOT:
13713 return reloc_class_plt;
13714 case R_PPC64_COPY:
13715 return reloc_class_copy;
13716 default:
13717 return reloc_class_normal;
13718 }
13719 }
13720
13721 /* Finish up the dynamic sections. */
13722
13723 static bfd_boolean
13724 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13725 struct bfd_link_info *info)
13726 {
13727 struct ppc_link_hash_table *htab;
13728 bfd *dynobj;
13729 asection *sdyn;
13730
13731 htab = ppc_hash_table (info);
13732 if (htab == NULL)
13733 return FALSE;
13734
13735 dynobj = htab->elf.dynobj;
13736 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13737
13738 if (htab->elf.dynamic_sections_created)
13739 {
13740 Elf64_External_Dyn *dyncon, *dynconend;
13741
13742 if (sdyn == NULL || htab->got == NULL)
13743 abort ();
13744
13745 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13746 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13747 for (; dyncon < dynconend; dyncon++)
13748 {
13749 Elf_Internal_Dyn dyn;
13750 asection *s;
13751
13752 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13753
13754 switch (dyn.d_tag)
13755 {
13756 default:
13757 continue;
13758
13759 case DT_PPC64_GLINK:
13760 s = htab->glink;
13761 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13762 /* We stupidly defined DT_PPC64_GLINK to be the start
13763 of glink rather than the first entry point, which is
13764 what ld.so needs, and now have a bigger stub to
13765 support automatic multiple TOCs. */
13766 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13767 break;
13768
13769 case DT_PPC64_OPD:
13770 s = bfd_get_section_by_name (output_bfd, ".opd");
13771 if (s == NULL)
13772 continue;
13773 dyn.d_un.d_ptr = s->vma;
13774 break;
13775
13776 case DT_PPC64_OPDSZ:
13777 s = bfd_get_section_by_name (output_bfd, ".opd");
13778 if (s == NULL)
13779 continue;
13780 dyn.d_un.d_val = s->size;
13781 break;
13782
13783 case DT_PLTGOT:
13784 s = htab->plt;
13785 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13786 break;
13787
13788 case DT_JMPREL:
13789 s = htab->relplt;
13790 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13791 break;
13792
13793 case DT_PLTRELSZ:
13794 dyn.d_un.d_val = htab->relplt->size;
13795 break;
13796
13797 case DT_RELASZ:
13798 /* Don't count procedure linkage table relocs in the
13799 overall reloc count. */
13800 s = htab->relplt;
13801 if (s == NULL)
13802 continue;
13803 dyn.d_un.d_val -= s->size;
13804 break;
13805
13806 case DT_RELA:
13807 /* We may not be using the standard ELF linker script.
13808 If .rela.plt is the first .rela section, we adjust
13809 DT_RELA to not include it. */
13810 s = htab->relplt;
13811 if (s == NULL)
13812 continue;
13813 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13814 continue;
13815 dyn.d_un.d_ptr += s->size;
13816 break;
13817 }
13818
13819 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13820 }
13821 }
13822
13823 if (htab->got != NULL && htab->got->size != 0)
13824 {
13825 /* Fill in the first entry in the global offset table.
13826 We use it to hold the link-time TOCbase. */
13827 bfd_put_64 (output_bfd,
13828 elf_gp (output_bfd) + TOC_BASE_OFF,
13829 htab->got->contents);
13830
13831 /* Set .got entry size. */
13832 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13833 }
13834
13835 if (htab->plt != NULL && htab->plt->size != 0)
13836 {
13837 /* Set .plt entry size. */
13838 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13839 = PLT_ENTRY_SIZE;
13840 }
13841
13842 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13843 brlt ourselves if emitrelocations. */
13844 if (htab->brlt != NULL
13845 && htab->brlt->reloc_count != 0
13846 && !_bfd_elf_link_output_relocs (output_bfd,
13847 htab->brlt,
13848 elf_section_data (htab->brlt)->rela.hdr,
13849 elf_section_data (htab->brlt)->relocs,
13850 NULL))
13851 return FALSE;
13852
13853 if (htab->glink != NULL
13854 && htab->glink->reloc_count != 0
13855 && !_bfd_elf_link_output_relocs (output_bfd,
13856 htab->glink,
13857 elf_section_data (htab->glink)->rela.hdr,
13858 elf_section_data (htab->glink)->relocs,
13859 NULL))
13860 return FALSE;
13861
13862
13863 if (htab->glink_eh_frame != NULL
13864 && htab->glink_eh_frame->sec_info_type == ELF_INFO_TYPE_EH_FRAME
13865 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
13866 htab->glink_eh_frame,
13867 htab->glink_eh_frame->contents))
13868 return FALSE;
13869
13870 /* We need to handle writing out multiple GOT sections ourselves,
13871 since we didn't add them to DYNOBJ. We know dynobj is the first
13872 bfd. */
13873 while ((dynobj = dynobj->link_next) != NULL)
13874 {
13875 asection *s;
13876
13877 if (!is_ppc64_elf (dynobj))
13878 continue;
13879
13880 s = ppc64_elf_tdata (dynobj)->got;
13881 if (s != NULL
13882 && s->size != 0
13883 && s->output_section != bfd_abs_section_ptr
13884 && !bfd_set_section_contents (output_bfd, s->output_section,
13885 s->contents, s->output_offset,
13886 s->size))
13887 return FALSE;
13888 s = ppc64_elf_tdata (dynobj)->relgot;
13889 if (s != NULL
13890 && s->size != 0
13891 && s->output_section != bfd_abs_section_ptr
13892 && !bfd_set_section_contents (output_bfd, s->output_section,
13893 s->contents, s->output_offset,
13894 s->size))
13895 return FALSE;
13896 }
13897
13898 return TRUE;
13899 }
13900
13901 #include "elf64-target.h"
GDB Binutils - Deliverables
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