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* elf64-ppc.c (ppc64_elf_func_desc_adjust): Hide ".TOC.".
[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, 2012 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 *, bfd_boolean);
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_maybe_function_sym ppc64_elf_maybe_function_sym
109 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
110 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
111 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
112 #define elf_backend_action_discarded ppc64_elf_action_discarded
113 #define elf_backend_relocate_section ppc64_elf_relocate_section
114 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
115 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
116 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
117 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
118 #define elf_backend_special_sections ppc64_elf_special_sections
119 #define elf_backend_post_process_headers _bfd_elf_set_osabi
120
121 /* The name of the dynamic interpreter. This is put in the .interp
122 section. */
123 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
124
125 /* The size in bytes of an entry in the procedure linkage table. */
126 #define PLT_ENTRY_SIZE 24
127
128 /* The initial size of the plt reserved for the dynamic linker. */
129 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
130
131 /* TOC base pointers offset from start of TOC. */
132 #define TOC_BASE_OFF 0x8000
133
134 /* Offset of tp and dtp pointers from start of TLS block. */
135 #define TP_OFFSET 0x7000
136 #define DTP_OFFSET 0x8000
137
138 /* .plt call stub instructions. The normal stub is like this, but
139 sometimes the .plt entry crosses a 64k boundary and we need to
140 insert an addi to adjust r12. */
141 #define PLT_CALL_STUB_SIZE (7*4)
142 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
143 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
144 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
145 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
146 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
147 /* ld %r11,xxx+16@l(%r12) */
148 #define BCTR 0x4e800420 /* bctr */
149
150
151 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
152 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
153 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
154 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
155
156 #define XOR_R11_R11_R11 0x7d6b5a78 /* xor %r11,%r11,%r11 */
157 #define ADD_R12_R12_R11 0x7d8c5a14 /* add %r12,%r12,%r11 */
158 #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */
159 #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */
160 #define BNECTR 0x4ca20420 /* bnectr+ */
161 #define BNECTR_P4 0x4ce20420 /* bnectr+ */
162
163 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
164 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
165
166 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
167
168 /* glink call stub instructions. We enter with the index in R0. */
169 #define GLINK_CALL_STUB_SIZE (16*4)
170 /* 0: */
171 /* .quad plt0-1f */
172 /* __glink: */
173 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
174 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
175 /* 1: */
176 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
177 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
178 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
179 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
180 /* ld %11,0(%12) */
181 /* ld %2,8(%12) */
182 /* mtctr %11 */
183 /* ld %11,16(%12) */
184 /* bctr */
185
186 /* Pad with this. */
187 #define NOP 0x60000000
188
189 /* Some other nops. */
190 #define CROR_151515 0x4def7b82
191 #define CROR_313131 0x4ffffb82
192
193 /* .glink entries for the first 32k functions are two instructions. */
194 #define LI_R0_0 0x38000000 /* li %r0,0 */
195 #define B_DOT 0x48000000 /* b . */
196
197 /* After that, we need two instructions to load the index, followed by
198 a branch. */
199 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
200 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
201
202 /* Instructions used by the save and restore reg functions. */
203 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
204 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
205 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
206 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
207 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
208 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
209 #define LI_R12_0 0x39800000 /* li %r12,0 */
210 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
211 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
212 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
213 #define BLR 0x4e800020 /* blr */
214
215 /* Since .opd is an array of descriptors and each entry will end up
216 with identical R_PPC64_RELATIVE relocs, there is really no need to
217 propagate .opd relocs; The dynamic linker should be taught to
218 relocate .opd without reloc entries. */
219 #ifndef NO_OPD_RELOCS
220 #define NO_OPD_RELOCS 0
221 #endif
222 \f
223 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
224
225 /* Relocation HOWTO's. */
226 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
227
228 static reloc_howto_type ppc64_elf_howto_raw[] = {
229 /* This reloc does nothing. */
230 HOWTO (R_PPC64_NONE, /* type */
231 0, /* rightshift */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
233 32, /* bitsize */
234 FALSE, /* pc_relative */
235 0, /* bitpos */
236 complain_overflow_dont, /* complain_on_overflow */
237 bfd_elf_generic_reloc, /* special_function */
238 "R_PPC64_NONE", /* name */
239 FALSE, /* partial_inplace */
240 0, /* src_mask */
241 0, /* dst_mask */
242 FALSE), /* pcrel_offset */
243
244 /* A standard 32 bit relocation. */
245 HOWTO (R_PPC64_ADDR32, /* type */
246 0, /* rightshift */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
248 32, /* bitsize */
249 FALSE, /* pc_relative */
250 0, /* bitpos */
251 complain_overflow_bitfield, /* complain_on_overflow */
252 bfd_elf_generic_reloc, /* special_function */
253 "R_PPC64_ADDR32", /* name */
254 FALSE, /* partial_inplace */
255 0, /* src_mask */
256 0xffffffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
258
259 /* An absolute 26 bit branch; the lower two bits must be zero.
260 FIXME: we don't check that, we just clear them. */
261 HOWTO (R_PPC64_ADDR24, /* type */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 26, /* bitsize */
265 FALSE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_PPC64_ADDR24", /* name */
270 FALSE, /* partial_inplace */
271 0, /* src_mask */
272 0x03fffffc, /* dst_mask */
273 FALSE), /* pcrel_offset */
274
275 /* A standard 16 bit relocation. */
276 HOWTO (R_PPC64_ADDR16, /* type */
277 0, /* rightshift */
278 1, /* size (0 = byte, 1 = short, 2 = long) */
279 16, /* bitsize */
280 FALSE, /* pc_relative */
281 0, /* bitpos */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_PPC64_ADDR16", /* name */
285 FALSE, /* partial_inplace */
286 0, /* src_mask */
287 0xffff, /* dst_mask */
288 FALSE), /* pcrel_offset */
289
290 /* A 16 bit relocation without overflow. */
291 HOWTO (R_PPC64_ADDR16_LO, /* type */
292 0, /* rightshift */
293 1, /* size (0 = byte, 1 = short, 2 = long) */
294 16, /* bitsize */
295 FALSE, /* pc_relative */
296 0, /* bitpos */
297 complain_overflow_dont,/* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_PPC64_ADDR16_LO", /* name */
300 FALSE, /* partial_inplace */
301 0, /* src_mask */
302 0xffff, /* dst_mask */
303 FALSE), /* pcrel_offset */
304
305 /* Bits 16-31 of an address. */
306 HOWTO (R_PPC64_ADDR16_HI, /* type */
307 16, /* rightshift */
308 1, /* size (0 = byte, 1 = short, 2 = long) */
309 16, /* bitsize */
310 FALSE, /* pc_relative */
311 0, /* bitpos */
312 complain_overflow_dont, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC64_ADDR16_HI", /* name */
315 FALSE, /* partial_inplace */
316 0, /* src_mask */
317 0xffff, /* dst_mask */
318 FALSE), /* pcrel_offset */
319
320 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
321 bits, treated as a signed number, is negative. */
322 HOWTO (R_PPC64_ADDR16_HA, /* type */
323 16, /* rightshift */
324 1, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_dont, /* complain_on_overflow */
329 ppc64_elf_ha_reloc, /* special_function */
330 "R_PPC64_ADDR16_HA", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* An absolute 16 bit branch; the lower two bits must be zero.
337 FIXME: we don't check that, we just clear them. */
338 HOWTO (R_PPC64_ADDR14, /* type */
339 0, /* rightshift */
340 2, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 FALSE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 ppc64_elf_branch_reloc, /* special_function */
346 "R_PPC64_ADDR14", /* name */
347 FALSE, /* partial_inplace */
348 0, /* src_mask */
349 0x0000fffc, /* dst_mask */
350 FALSE), /* pcrel_offset */
351
352 /* An absolute 16 bit branch, for which bit 10 should be set to
353 indicate that the branch is expected to be taken. The lower two
354 bits must be zero. */
355 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
356 0, /* rightshift */
357 2, /* size (0 = byte, 1 = short, 2 = long) */
358 16, /* bitsize */
359 FALSE, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_bitfield, /* complain_on_overflow */
362 ppc64_elf_brtaken_reloc, /* special_function */
363 "R_PPC64_ADDR14_BRTAKEN",/* name */
364 FALSE, /* partial_inplace */
365 0, /* src_mask */
366 0x0000fffc, /* dst_mask */
367 FALSE), /* pcrel_offset */
368
369 /* An absolute 16 bit branch, for which bit 10 should be set to
370 indicate that the branch is not expected to be taken. The lower
371 two bits must be zero. */
372 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
373 0, /* rightshift */
374 2, /* size (0 = byte, 1 = short, 2 = long) */
375 16, /* bitsize */
376 FALSE, /* pc_relative */
377 0, /* bitpos */
378 complain_overflow_bitfield, /* complain_on_overflow */
379 ppc64_elf_brtaken_reloc, /* special_function */
380 "R_PPC64_ADDR14_BRNTAKEN",/* name */
381 FALSE, /* partial_inplace */
382 0, /* src_mask */
383 0x0000fffc, /* dst_mask */
384 FALSE), /* pcrel_offset */
385
386 /* A relative 26 bit branch; the lower two bits must be zero. */
387 HOWTO (R_PPC64_REL24, /* type */
388 0, /* rightshift */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
390 26, /* bitsize */
391 TRUE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_signed, /* complain_on_overflow */
394 ppc64_elf_branch_reloc, /* special_function */
395 "R_PPC64_REL24", /* name */
396 FALSE, /* partial_inplace */
397 0, /* src_mask */
398 0x03fffffc, /* dst_mask */
399 TRUE), /* pcrel_offset */
400
401 /* A relative 16 bit branch; the lower two bits must be zero. */
402 HOWTO (R_PPC64_REL14, /* type */
403 0, /* rightshift */
404 2, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 TRUE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_signed, /* complain_on_overflow */
409 ppc64_elf_branch_reloc, /* special_function */
410 "R_PPC64_REL14", /* name */
411 FALSE, /* partial_inplace */
412 0, /* src_mask */
413 0x0000fffc, /* dst_mask */
414 TRUE), /* pcrel_offset */
415
416 /* A relative 16 bit branch. Bit 10 should be set to indicate that
417 the branch is expected to be taken. The lower two bits must be
418 zero. */
419 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
420 0, /* rightshift */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 TRUE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_signed, /* complain_on_overflow */
426 ppc64_elf_brtaken_reloc, /* special_function */
427 "R_PPC64_REL14_BRTAKEN", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0x0000fffc, /* dst_mask */
431 TRUE), /* pcrel_offset */
432
433 /* A relative 16 bit branch. Bit 10 should be set to indicate that
434 the branch is not expected to be taken. The lower two bits must
435 be zero. */
436 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 16, /* bitsize */
440 TRUE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_signed, /* complain_on_overflow */
443 ppc64_elf_brtaken_reloc, /* special_function */
444 "R_PPC64_REL14_BRNTAKEN",/* name */
445 FALSE, /* partial_inplace */
446 0, /* src_mask */
447 0x0000fffc, /* dst_mask */
448 TRUE), /* pcrel_offset */
449
450 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
451 symbol. */
452 HOWTO (R_PPC64_GOT16, /* type */
453 0, /* rightshift */
454 1, /* size (0 = byte, 1 = short, 2 = long) */
455 16, /* bitsize */
456 FALSE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_signed, /* complain_on_overflow */
459 ppc64_elf_unhandled_reloc, /* special_function */
460 "R_PPC64_GOT16", /* name */
461 FALSE, /* partial_inplace */
462 0, /* src_mask */
463 0xffff, /* dst_mask */
464 FALSE), /* pcrel_offset */
465
466 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
467 the symbol. */
468 HOWTO (R_PPC64_GOT16_LO, /* type */
469 0, /* rightshift */
470 1, /* size (0 = byte, 1 = short, 2 = long) */
471 16, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 ppc64_elf_unhandled_reloc, /* special_function */
476 "R_PPC64_GOT16_LO", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
483 the symbol. */
484 HOWTO (R_PPC64_GOT16_HI, /* type */
485 16, /* rightshift */
486 1, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_dont,/* complain_on_overflow */
491 ppc64_elf_unhandled_reloc, /* special_function */
492 "R_PPC64_GOT16_HI", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
499 the symbol. */
500 HOWTO (R_PPC64_GOT16_HA, /* type */
501 16, /* rightshift */
502 1, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_dont,/* complain_on_overflow */
507 ppc64_elf_unhandled_reloc, /* special_function */
508 "R_PPC64_GOT16_HA", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* This is used only by the dynamic linker. The symbol should exist
515 both in the object being run and in some shared library. The
516 dynamic linker copies the data addressed by the symbol from the
517 shared library into the object, because the object being
518 run has to have the data at some particular address. */
519 HOWTO (R_PPC64_COPY, /* type */
520 0, /* rightshift */
521 0, /* this one is variable size */
522 0, /* bitsize */
523 FALSE, /* pc_relative */
524 0, /* bitpos */
525 complain_overflow_dont, /* complain_on_overflow */
526 ppc64_elf_unhandled_reloc, /* special_function */
527 "R_PPC64_COPY", /* name */
528 FALSE, /* partial_inplace */
529 0, /* src_mask */
530 0, /* dst_mask */
531 FALSE), /* pcrel_offset */
532
533 /* Like R_PPC64_ADDR64, but used when setting global offset table
534 entries. */
535 HOWTO (R_PPC64_GLOB_DAT, /* type */
536 0, /* rightshift */
537 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
538 64, /* bitsize */
539 FALSE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_dont, /* complain_on_overflow */
542 ppc64_elf_unhandled_reloc, /* special_function */
543 "R_PPC64_GLOB_DAT", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 ONES (64), /* dst_mask */
547 FALSE), /* pcrel_offset */
548
549 /* Created by the link editor. Marks a procedure linkage table
550 entry for a symbol. */
551 HOWTO (R_PPC64_JMP_SLOT, /* type */
552 0, /* rightshift */
553 0, /* size (0 = byte, 1 = short, 2 = long) */
554 0, /* bitsize */
555 FALSE, /* pc_relative */
556 0, /* bitpos */
557 complain_overflow_dont, /* complain_on_overflow */
558 ppc64_elf_unhandled_reloc, /* special_function */
559 "R_PPC64_JMP_SLOT", /* name */
560 FALSE, /* partial_inplace */
561 0, /* src_mask */
562 0, /* dst_mask */
563 FALSE), /* pcrel_offset */
564
565 /* Used only by the dynamic linker. When the object is run, this
566 doubleword64 is set to the load address of the object, plus the
567 addend. */
568 HOWTO (R_PPC64_RELATIVE, /* type */
569 0, /* rightshift */
570 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
571 64, /* bitsize */
572 FALSE, /* pc_relative */
573 0, /* bitpos */
574 complain_overflow_dont, /* complain_on_overflow */
575 bfd_elf_generic_reloc, /* special_function */
576 "R_PPC64_RELATIVE", /* name */
577 FALSE, /* partial_inplace */
578 0, /* src_mask */
579 ONES (64), /* dst_mask */
580 FALSE), /* pcrel_offset */
581
582 /* Like R_PPC64_ADDR32, but may be unaligned. */
583 HOWTO (R_PPC64_UADDR32, /* type */
584 0, /* rightshift */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
586 32, /* bitsize */
587 FALSE, /* pc_relative */
588 0, /* bitpos */
589 complain_overflow_bitfield, /* complain_on_overflow */
590 bfd_elf_generic_reloc, /* special_function */
591 "R_PPC64_UADDR32", /* name */
592 FALSE, /* partial_inplace */
593 0, /* src_mask */
594 0xffffffff, /* dst_mask */
595 FALSE), /* pcrel_offset */
596
597 /* Like R_PPC64_ADDR16, but may be unaligned. */
598 HOWTO (R_PPC64_UADDR16, /* type */
599 0, /* rightshift */
600 1, /* size (0 = byte, 1 = short, 2 = long) */
601 16, /* bitsize */
602 FALSE, /* pc_relative */
603 0, /* bitpos */
604 complain_overflow_bitfield, /* complain_on_overflow */
605 bfd_elf_generic_reloc, /* special_function */
606 "R_PPC64_UADDR16", /* name */
607 FALSE, /* partial_inplace */
608 0, /* src_mask */
609 0xffff, /* dst_mask */
610 FALSE), /* pcrel_offset */
611
612 /* 32-bit PC relative. */
613 HOWTO (R_PPC64_REL32, /* type */
614 0, /* rightshift */
615 2, /* size (0 = byte, 1 = short, 2 = long) */
616 32, /* bitsize */
617 TRUE, /* pc_relative */
618 0, /* bitpos */
619 /* FIXME: Verify. Was complain_overflow_bitfield. */
620 complain_overflow_signed, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 "R_PPC64_REL32", /* name */
623 FALSE, /* partial_inplace */
624 0, /* src_mask */
625 0xffffffff, /* dst_mask */
626 TRUE), /* pcrel_offset */
627
628 /* 32-bit relocation to the symbol's procedure linkage table. */
629 HOWTO (R_PPC64_PLT32, /* type */
630 0, /* rightshift */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
632 32, /* bitsize */
633 FALSE, /* pc_relative */
634 0, /* bitpos */
635 complain_overflow_bitfield, /* complain_on_overflow */
636 ppc64_elf_unhandled_reloc, /* special_function */
637 "R_PPC64_PLT32", /* name */
638 FALSE, /* partial_inplace */
639 0, /* src_mask */
640 0xffffffff, /* dst_mask */
641 FALSE), /* pcrel_offset */
642
643 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
644 FIXME: R_PPC64_PLTREL32 not supported. */
645 HOWTO (R_PPC64_PLTREL32, /* type */
646 0, /* rightshift */
647 2, /* size (0 = byte, 1 = short, 2 = long) */
648 32, /* bitsize */
649 TRUE, /* pc_relative */
650 0, /* bitpos */
651 complain_overflow_signed, /* complain_on_overflow */
652 bfd_elf_generic_reloc, /* special_function */
653 "R_PPC64_PLTREL32", /* name */
654 FALSE, /* partial_inplace */
655 0, /* src_mask */
656 0xffffffff, /* dst_mask */
657 TRUE), /* pcrel_offset */
658
659 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
660 the symbol. */
661 HOWTO (R_PPC64_PLT16_LO, /* type */
662 0, /* rightshift */
663 1, /* size (0 = byte, 1 = short, 2 = long) */
664 16, /* bitsize */
665 FALSE, /* pc_relative */
666 0, /* bitpos */
667 complain_overflow_dont, /* complain_on_overflow */
668 ppc64_elf_unhandled_reloc, /* special_function */
669 "R_PPC64_PLT16_LO", /* name */
670 FALSE, /* partial_inplace */
671 0, /* src_mask */
672 0xffff, /* dst_mask */
673 FALSE), /* pcrel_offset */
674
675 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
676 the symbol. */
677 HOWTO (R_PPC64_PLT16_HI, /* type */
678 16, /* rightshift */
679 1, /* size (0 = byte, 1 = short, 2 = long) */
680 16, /* bitsize */
681 FALSE, /* pc_relative */
682 0, /* bitpos */
683 complain_overflow_dont, /* complain_on_overflow */
684 ppc64_elf_unhandled_reloc, /* special_function */
685 "R_PPC64_PLT16_HI", /* name */
686 FALSE, /* partial_inplace */
687 0, /* src_mask */
688 0xffff, /* dst_mask */
689 FALSE), /* pcrel_offset */
690
691 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
692 the symbol. */
693 HOWTO (R_PPC64_PLT16_HA, /* type */
694 16, /* rightshift */
695 1, /* size (0 = byte, 1 = short, 2 = long) */
696 16, /* bitsize */
697 FALSE, /* pc_relative */
698 0, /* bitpos */
699 complain_overflow_dont, /* complain_on_overflow */
700 ppc64_elf_unhandled_reloc, /* special_function */
701 "R_PPC64_PLT16_HA", /* name */
702 FALSE, /* partial_inplace */
703 0, /* src_mask */
704 0xffff, /* dst_mask */
705 FALSE), /* pcrel_offset */
706
707 /* 16-bit section relative relocation. */
708 HOWTO (R_PPC64_SECTOFF, /* type */
709 0, /* rightshift */
710 1, /* size (0 = byte, 1 = short, 2 = long) */
711 16, /* bitsize */
712 FALSE, /* pc_relative */
713 0, /* bitpos */
714 complain_overflow_bitfield, /* complain_on_overflow */
715 ppc64_elf_sectoff_reloc, /* special_function */
716 "R_PPC64_SECTOFF", /* name */
717 FALSE, /* partial_inplace */
718 0, /* src_mask */
719 0xffff, /* dst_mask */
720 FALSE), /* pcrel_offset */
721
722 /* Like R_PPC64_SECTOFF, but no overflow warning. */
723 HOWTO (R_PPC64_SECTOFF_LO, /* type */
724 0, /* rightshift */
725 1, /* size (0 = byte, 1 = short, 2 = long) */
726 16, /* bitsize */
727 FALSE, /* pc_relative */
728 0, /* bitpos */
729 complain_overflow_dont, /* complain_on_overflow */
730 ppc64_elf_sectoff_reloc, /* special_function */
731 "R_PPC64_SECTOFF_LO", /* name */
732 FALSE, /* partial_inplace */
733 0, /* src_mask */
734 0xffff, /* dst_mask */
735 FALSE), /* pcrel_offset */
736
737 /* 16-bit upper half section relative relocation. */
738 HOWTO (R_PPC64_SECTOFF_HI, /* type */
739 16, /* rightshift */
740 1, /* size (0 = byte, 1 = short, 2 = long) */
741 16, /* bitsize */
742 FALSE, /* pc_relative */
743 0, /* bitpos */
744 complain_overflow_dont, /* complain_on_overflow */
745 ppc64_elf_sectoff_reloc, /* special_function */
746 "R_PPC64_SECTOFF_HI", /* name */
747 FALSE, /* partial_inplace */
748 0, /* src_mask */
749 0xffff, /* dst_mask */
750 FALSE), /* pcrel_offset */
751
752 /* 16-bit upper half adjusted section relative relocation. */
753 HOWTO (R_PPC64_SECTOFF_HA, /* type */
754 16, /* rightshift */
755 1, /* size (0 = byte, 1 = short, 2 = long) */
756 16, /* bitsize */
757 FALSE, /* pc_relative */
758 0, /* bitpos */
759 complain_overflow_dont, /* complain_on_overflow */
760 ppc64_elf_sectoff_ha_reloc, /* special_function */
761 "R_PPC64_SECTOFF_HA", /* name */
762 FALSE, /* partial_inplace */
763 0, /* src_mask */
764 0xffff, /* dst_mask */
765 FALSE), /* pcrel_offset */
766
767 /* Like R_PPC64_REL24 without touching the two least significant bits. */
768 HOWTO (R_PPC64_REL30, /* type */
769 2, /* rightshift */
770 2, /* size (0 = byte, 1 = short, 2 = long) */
771 30, /* bitsize */
772 TRUE, /* pc_relative */
773 0, /* bitpos */
774 complain_overflow_dont, /* complain_on_overflow */
775 bfd_elf_generic_reloc, /* special_function */
776 "R_PPC64_REL30", /* name */
777 FALSE, /* partial_inplace */
778 0, /* src_mask */
779 0xfffffffc, /* dst_mask */
780 TRUE), /* pcrel_offset */
781
782 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
783
784 /* A standard 64-bit relocation. */
785 HOWTO (R_PPC64_ADDR64, /* type */
786 0, /* rightshift */
787 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
788 64, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC64_ADDR64", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 ONES (64), /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* The bits 32-47 of an address. */
800 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
801 32, /* rightshift */
802 1, /* size (0 = byte, 1 = short, 2 = long) */
803 16, /* bitsize */
804 FALSE, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_PPC64_ADDR16_HIGHER", /* name */
809 FALSE, /* partial_inplace */
810 0, /* src_mask */
811 0xffff, /* dst_mask */
812 FALSE), /* pcrel_offset */
813
814 /* The bits 32-47 of an address, plus 1 if the contents of the low
815 16 bits, treated as a signed number, is negative. */
816 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
817 32, /* rightshift */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
819 16, /* bitsize */
820 FALSE, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc64_elf_ha_reloc, /* special_function */
824 "R_PPC64_ADDR16_HIGHERA", /* name */
825 FALSE, /* partial_inplace */
826 0, /* src_mask */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
829
830 /* The bits 48-63 of an address. */
831 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
832 48, /* rightshift */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
834 16, /* bitsize */
835 FALSE, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_PPC64_ADDR16_HIGHEST", /* name */
840 FALSE, /* partial_inplace */
841 0, /* src_mask */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
844
845 /* The bits 48-63 of an address, plus 1 if the contents of the low
846 16 bits, treated as a signed number, is negative. */
847 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
848 48, /* rightshift */
849 1, /* size (0 = byte, 1 = short, 2 = long) */
850 16, /* bitsize */
851 FALSE, /* pc_relative */
852 0, /* bitpos */
853 complain_overflow_dont, /* complain_on_overflow */
854 ppc64_elf_ha_reloc, /* special_function */
855 "R_PPC64_ADDR16_HIGHESTA", /* name */
856 FALSE, /* partial_inplace */
857 0, /* src_mask */
858 0xffff, /* dst_mask */
859 FALSE), /* pcrel_offset */
860
861 /* Like ADDR64, but may be unaligned. */
862 HOWTO (R_PPC64_UADDR64, /* type */
863 0, /* rightshift */
864 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
865 64, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_dont, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "R_PPC64_UADDR64", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 ONES (64), /* dst_mask */
874 FALSE), /* pcrel_offset */
875
876 /* 64-bit relative relocation. */
877 HOWTO (R_PPC64_REL64, /* type */
878 0, /* rightshift */
879 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
880 64, /* bitsize */
881 TRUE, /* pc_relative */
882 0, /* bitpos */
883 complain_overflow_dont, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "R_PPC64_REL64", /* name */
886 FALSE, /* partial_inplace */
887 0, /* src_mask */
888 ONES (64), /* dst_mask */
889 TRUE), /* pcrel_offset */
890
891 /* 64-bit relocation to the symbol's procedure linkage table. */
892 HOWTO (R_PPC64_PLT64, /* type */
893 0, /* rightshift */
894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
895 64, /* bitsize */
896 FALSE, /* pc_relative */
897 0, /* bitpos */
898 complain_overflow_dont, /* complain_on_overflow */
899 ppc64_elf_unhandled_reloc, /* special_function */
900 "R_PPC64_PLT64", /* name */
901 FALSE, /* partial_inplace */
902 0, /* src_mask */
903 ONES (64), /* dst_mask */
904 FALSE), /* pcrel_offset */
905
906 /* 64-bit PC relative relocation to the symbol's procedure linkage
907 table. */
908 /* FIXME: R_PPC64_PLTREL64 not supported. */
909 HOWTO (R_PPC64_PLTREL64, /* type */
910 0, /* rightshift */
911 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
912 64, /* bitsize */
913 TRUE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_dont, /* complain_on_overflow */
916 ppc64_elf_unhandled_reloc, /* special_function */
917 "R_PPC64_PLTREL64", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 ONES (64), /* dst_mask */
921 TRUE), /* pcrel_offset */
922
923 /* 16 bit TOC-relative relocation. */
924
925 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
926 HOWTO (R_PPC64_TOC16, /* type */
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc64_elf_toc_reloc, /* special_function */
934 "R_PPC64_TOC16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* 16 bit TOC-relative relocation without overflow. */
941
942 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
943 HOWTO (R_PPC64_TOC16_LO, /* type */
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_dont, /* complain_on_overflow */
950 ppc64_elf_toc_reloc, /* special_function */
951 "R_PPC64_TOC16_LO", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* 16 bit TOC-relative relocation, high 16 bits. */
958
959 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
960 HOWTO (R_PPC64_TOC16_HI, /* type */
961 16, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_dont, /* complain_on_overflow */
967 ppc64_elf_toc_reloc, /* special_function */
968 "R_PPC64_TOC16_HI", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
975 contents of the low 16 bits, treated as a signed number, is
976 negative. */
977
978 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
979 HOWTO (R_PPC64_TOC16_HA, /* type */
980 16, /* rightshift */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
982 16, /* bitsize */
983 FALSE, /* pc_relative */
984 0, /* bitpos */
985 complain_overflow_dont, /* complain_on_overflow */
986 ppc64_elf_toc_ha_reloc, /* special_function */
987 "R_PPC64_TOC16_HA", /* name */
988 FALSE, /* partial_inplace */
989 0, /* src_mask */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
992
993 /* 64-bit relocation; insert value of TOC base (.TOC.). */
994
995 /* R_PPC64_TOC 51 doubleword64 .TOC. */
996 HOWTO (R_PPC64_TOC, /* type */
997 0, /* rightshift */
998 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
999 64, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_bitfield, /* complain_on_overflow */
1003 ppc64_elf_toc64_reloc, /* special_function */
1004 "R_PPC64_TOC", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 ONES (64), /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Like R_PPC64_GOT16, but also informs the link editor that the
1011 value to relocate may (!) refer to a PLT entry which the link
1012 editor (a) may replace with the symbol value. If the link editor
1013 is unable to fully resolve the symbol, it may (b) create a PLT
1014 entry and store the address to the new PLT entry in the GOT.
1015 This permits lazy resolution of function symbols at run time.
1016 The link editor may also skip all of this and just (c) emit a
1017 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1018 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1019 HOWTO (R_PPC64_PLTGOT16, /* type */
1020 0, /* rightshift */
1021 1, /* size (0 = byte, 1 = short, 2 = long) */
1022 16, /* bitsize */
1023 FALSE, /* pc_relative */
1024 0, /* bitpos */
1025 complain_overflow_signed, /* complain_on_overflow */
1026 ppc64_elf_unhandled_reloc, /* special_function */
1027 "R_PPC64_PLTGOT16", /* name */
1028 FALSE, /* partial_inplace */
1029 0, /* src_mask */
1030 0xffff, /* dst_mask */
1031 FALSE), /* pcrel_offset */
1032
1033 /* Like R_PPC64_PLTGOT16, but without overflow. */
1034 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1035 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1036 0, /* rightshift */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1038 16, /* bitsize */
1039 FALSE, /* pc_relative */
1040 0, /* bitpos */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc64_elf_unhandled_reloc, /* special_function */
1043 "R_PPC64_PLTGOT16_LO", /* name */
1044 FALSE, /* partial_inplace */
1045 0, /* src_mask */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1048
1049 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1050 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1051 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1052 16, /* rightshift */
1053 1, /* size (0 = byte, 1 = short, 2 = long) */
1054 16, /* bitsize */
1055 FALSE, /* pc_relative */
1056 0, /* bitpos */
1057 complain_overflow_dont, /* complain_on_overflow */
1058 ppc64_elf_unhandled_reloc, /* special_function */
1059 "R_PPC64_PLTGOT16_HI", /* name */
1060 FALSE, /* partial_inplace */
1061 0, /* src_mask */
1062 0xffff, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1064
1065 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1066 1 if the contents of the low 16 bits, treated as a signed number,
1067 is negative. */
1068 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1069 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1070 16, /* rightshift */
1071 1, /* size (0 = byte, 1 = short, 2 = long) */
1072 16, /* bitsize */
1073 FALSE, /* pc_relative */
1074 0, /* bitpos */
1075 complain_overflow_dont,/* complain_on_overflow */
1076 ppc64_elf_unhandled_reloc, /* special_function */
1077 "R_PPC64_PLTGOT16_HA", /* name */
1078 FALSE, /* partial_inplace */
1079 0, /* src_mask */
1080 0xffff, /* dst_mask */
1081 FALSE), /* pcrel_offset */
1082
1083 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1084 HOWTO (R_PPC64_ADDR16_DS, /* type */
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_bitfield, /* complain_on_overflow */
1091 bfd_elf_generic_reloc, /* special_function */
1092 "R_PPC64_ADDR16_DS", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xfffc, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1099 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont,/* complain_on_overflow */
1106 bfd_elf_generic_reloc, /* special_function */
1107 "R_PPC64_ADDR16_LO_DS",/* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xfffc, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1114 HOWTO (R_PPC64_GOT16_DS, /* type */
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc64_elf_unhandled_reloc, /* special_function */
1122 "R_PPC64_GOT16_DS", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xfffc, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1129 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc64_elf_unhandled_reloc, /* special_function */
1137 "R_PPC64_GOT16_LO_DS", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xfffc, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1144 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1145 0, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc64_elf_unhandled_reloc, /* special_function */
1152 "R_PPC64_PLT16_LO_DS", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xfffc, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1159 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1160 0, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_bitfield, /* complain_on_overflow */
1166 ppc64_elf_sectoff_reloc, /* special_function */
1167 "R_PPC64_SECTOFF_DS", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xfffc, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1174 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_dont, /* complain_on_overflow */
1181 ppc64_elf_sectoff_reloc, /* special_function */
1182 "R_PPC64_SECTOFF_LO_DS",/* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xfffc, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1189 HOWTO (R_PPC64_TOC16_DS, /* type */
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_signed, /* complain_on_overflow */
1196 ppc64_elf_toc_reloc, /* special_function */
1197 "R_PPC64_TOC16_DS", /* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xfffc, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1204 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1205 0, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_dont, /* complain_on_overflow */
1211 ppc64_elf_toc_reloc, /* special_function */
1212 "R_PPC64_TOC16_LO_DS", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xfffc, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1219 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1220 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1221 0, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_signed, /* complain_on_overflow */
1227 ppc64_elf_unhandled_reloc, /* special_function */
1228 "R_PPC64_PLTGOT16_DS", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xfffc, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1235 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1236 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1237 0, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc64_elf_unhandled_reloc, /* special_function */
1244 "R_PPC64_PLTGOT16_LO_DS",/* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xfffc, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Marker relocs for TLS. */
1251 HOWTO (R_PPC64_TLS,
1252 0, /* rightshift */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1254 32, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 "R_PPC64_TLS", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 HOWTO (R_PPC64_TLSGD,
1266 0, /* rightshift */
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1268 32, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC64_TLSGD", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 HOWTO (R_PPC64_TLSLD,
1280 0, /* rightshift */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 32, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC64_TLSLD", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 HOWTO (R_PPC64_TOCSAVE,
1294 0, /* rightshift */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 32, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_dont, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC64_TOCSAVE", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306
1307 /* Computes the load module index of the load module that contains the
1308 definition of its TLS sym. */
1309 HOWTO (R_PPC64_DTPMOD64,
1310 0, /* rightshift */
1311 4, /* size (0 = byte, 1 = short, 2 = long) */
1312 64, /* bitsize */
1313 FALSE, /* pc_relative */
1314 0, /* bitpos */
1315 complain_overflow_dont, /* complain_on_overflow */
1316 ppc64_elf_unhandled_reloc, /* special_function */
1317 "R_PPC64_DTPMOD64", /* name */
1318 FALSE, /* partial_inplace */
1319 0, /* src_mask */
1320 ONES (64), /* dst_mask */
1321 FALSE), /* pcrel_offset */
1322
1323 /* Computes a dtv-relative displacement, the difference between the value
1324 of sym+add and the base address of the thread-local storage block that
1325 contains the definition of sym, minus 0x8000. */
1326 HOWTO (R_PPC64_DTPREL64,
1327 0, /* rightshift */
1328 4, /* size (0 = byte, 1 = short, 2 = long) */
1329 64, /* bitsize */
1330 FALSE, /* pc_relative */
1331 0, /* bitpos */
1332 complain_overflow_dont, /* complain_on_overflow */
1333 ppc64_elf_unhandled_reloc, /* special_function */
1334 "R_PPC64_DTPREL64", /* name */
1335 FALSE, /* partial_inplace */
1336 0, /* src_mask */
1337 ONES (64), /* dst_mask */
1338 FALSE), /* pcrel_offset */
1339
1340 /* A 16 bit dtprel reloc. */
1341 HOWTO (R_PPC64_DTPREL16,
1342 0, /* rightshift */
1343 1, /* size (0 = byte, 1 = short, 2 = long) */
1344 16, /* bitsize */
1345 FALSE, /* pc_relative */
1346 0, /* bitpos */
1347 complain_overflow_signed, /* complain_on_overflow */
1348 ppc64_elf_unhandled_reloc, /* special_function */
1349 "R_PPC64_DTPREL16", /* name */
1350 FALSE, /* partial_inplace */
1351 0, /* src_mask */
1352 0xffff, /* dst_mask */
1353 FALSE), /* pcrel_offset */
1354
1355 /* Like DTPREL16, but no overflow. */
1356 HOWTO (R_PPC64_DTPREL16_LO,
1357 0, /* rightshift */
1358 1, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_dont, /* complain_on_overflow */
1363 ppc64_elf_unhandled_reloc, /* special_function */
1364 "R_PPC64_DTPREL16_LO", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1371 HOWTO (R_PPC64_DTPREL16_HI,
1372 16, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 FALSE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_dont, /* complain_on_overflow */
1378 ppc64_elf_unhandled_reloc, /* special_function */
1379 "R_PPC64_DTPREL16_HI", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1386 HOWTO (R_PPC64_DTPREL16_HA,
1387 16, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 FALSE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_dont, /* complain_on_overflow */
1393 ppc64_elf_unhandled_reloc, /* special_function */
1394 "R_PPC64_DTPREL16_HA", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 FALSE), /* pcrel_offset */
1399
1400 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1401 HOWTO (R_PPC64_DTPREL16_HIGHER,
1402 32, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 FALSE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 ppc64_elf_unhandled_reloc, /* special_function */
1409 "R_PPC64_DTPREL16_HIGHER", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 FALSE), /* pcrel_offset */
1414
1415 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1416 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1417 32, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 FALSE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 ppc64_elf_unhandled_reloc, /* special_function */
1424 "R_PPC64_DTPREL16_HIGHERA", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 FALSE), /* pcrel_offset */
1429
1430 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1431 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1432 48, /* rightshift */
1433 1, /* size (0 = byte, 1 = short, 2 = long) */
1434 16, /* bitsize */
1435 FALSE, /* pc_relative */
1436 0, /* bitpos */
1437 complain_overflow_dont, /* complain_on_overflow */
1438 ppc64_elf_unhandled_reloc, /* special_function */
1439 "R_PPC64_DTPREL16_HIGHEST", /* name */
1440 FALSE, /* partial_inplace */
1441 0, /* src_mask */
1442 0xffff, /* dst_mask */
1443 FALSE), /* pcrel_offset */
1444
1445 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1446 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1447 48, /* rightshift */
1448 1, /* size (0 = byte, 1 = short, 2 = long) */
1449 16, /* bitsize */
1450 FALSE, /* pc_relative */
1451 0, /* bitpos */
1452 complain_overflow_dont, /* complain_on_overflow */
1453 ppc64_elf_unhandled_reloc, /* special_function */
1454 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1455 FALSE, /* partial_inplace */
1456 0, /* src_mask */
1457 0xffff, /* dst_mask */
1458 FALSE), /* pcrel_offset */
1459
1460 /* Like DTPREL16, but for insns with a DS field. */
1461 HOWTO (R_PPC64_DTPREL16_DS,
1462 0, /* rightshift */
1463 1, /* size (0 = byte, 1 = short, 2 = long) */
1464 16, /* bitsize */
1465 FALSE, /* pc_relative */
1466 0, /* bitpos */
1467 complain_overflow_signed, /* complain_on_overflow */
1468 ppc64_elf_unhandled_reloc, /* special_function */
1469 "R_PPC64_DTPREL16_DS", /* name */
1470 FALSE, /* partial_inplace */
1471 0, /* src_mask */
1472 0xfffc, /* dst_mask */
1473 FALSE), /* pcrel_offset */
1474
1475 /* Like DTPREL16_DS, but no overflow. */
1476 HOWTO (R_PPC64_DTPREL16_LO_DS,
1477 0, /* rightshift */
1478 1, /* size (0 = byte, 1 = short, 2 = long) */
1479 16, /* bitsize */
1480 FALSE, /* pc_relative */
1481 0, /* bitpos */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 ppc64_elf_unhandled_reloc, /* special_function */
1484 "R_PPC64_DTPREL16_LO_DS", /* name */
1485 FALSE, /* partial_inplace */
1486 0, /* src_mask */
1487 0xfffc, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1489
1490 /* Computes a tp-relative displacement, the difference between the value of
1491 sym+add and the value of the thread pointer (r13). */
1492 HOWTO (R_PPC64_TPREL64,
1493 0, /* rightshift */
1494 4, /* size (0 = byte, 1 = short, 2 = long) */
1495 64, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc64_elf_unhandled_reloc, /* special_function */
1500 "R_PPC64_TPREL64", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 ONES (64), /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* A 16 bit tprel reloc. */
1507 HOWTO (R_PPC64_TPREL16,
1508 0, /* rightshift */
1509 1, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_signed, /* complain_on_overflow */
1514 ppc64_elf_unhandled_reloc, /* special_function */
1515 "R_PPC64_TPREL16", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0xffff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Like TPREL16, but no overflow. */
1522 HOWTO (R_PPC64_TPREL16_LO,
1523 0, /* rightshift */
1524 1, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc64_elf_unhandled_reloc, /* special_function */
1530 "R_PPC64_TPREL16_LO", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0xffff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* Like TPREL16_LO, but next higher group of 16 bits. */
1537 HOWTO (R_PPC64_TPREL16_HI,
1538 16, /* rightshift */
1539 1, /* size (0 = byte, 1 = short, 2 = long) */
1540 16, /* bitsize */
1541 FALSE, /* pc_relative */
1542 0, /* bitpos */
1543 complain_overflow_dont, /* complain_on_overflow */
1544 ppc64_elf_unhandled_reloc, /* special_function */
1545 "R_PPC64_TPREL16_HI", /* name */
1546 FALSE, /* partial_inplace */
1547 0, /* src_mask */
1548 0xffff, /* dst_mask */
1549 FALSE), /* pcrel_offset */
1550
1551 /* Like TPREL16_HI, but adjust for low 16 bits. */
1552 HOWTO (R_PPC64_TPREL16_HA,
1553 16, /* rightshift */
1554 1, /* size (0 = byte, 1 = short, 2 = long) */
1555 16, /* bitsize */
1556 FALSE, /* pc_relative */
1557 0, /* bitpos */
1558 complain_overflow_dont, /* complain_on_overflow */
1559 ppc64_elf_unhandled_reloc, /* special_function */
1560 "R_PPC64_TPREL16_HA", /* name */
1561 FALSE, /* partial_inplace */
1562 0, /* src_mask */
1563 0xffff, /* dst_mask */
1564 FALSE), /* pcrel_offset */
1565
1566 /* Like TPREL16_HI, but next higher group of 16 bits. */
1567 HOWTO (R_PPC64_TPREL16_HIGHER,
1568 32, /* rightshift */
1569 1, /* size (0 = byte, 1 = short, 2 = long) */
1570 16, /* bitsize */
1571 FALSE, /* pc_relative */
1572 0, /* bitpos */
1573 complain_overflow_dont, /* complain_on_overflow */
1574 ppc64_elf_unhandled_reloc, /* special_function */
1575 "R_PPC64_TPREL16_HIGHER", /* name */
1576 FALSE, /* partial_inplace */
1577 0, /* src_mask */
1578 0xffff, /* dst_mask */
1579 FALSE), /* pcrel_offset */
1580
1581 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1582 HOWTO (R_PPC64_TPREL16_HIGHERA,
1583 32, /* rightshift */
1584 1, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
1588 complain_overflow_dont, /* complain_on_overflow */
1589 ppc64_elf_unhandled_reloc, /* special_function */
1590 "R_PPC64_TPREL16_HIGHERA", /* name */
1591 FALSE, /* partial_inplace */
1592 0, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE), /* pcrel_offset */
1595
1596 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1597 HOWTO (R_PPC64_TPREL16_HIGHEST,
1598 48, /* rightshift */
1599 1, /* size (0 = byte, 1 = short, 2 = long) */
1600 16, /* bitsize */
1601 FALSE, /* pc_relative */
1602 0, /* bitpos */
1603 complain_overflow_dont, /* complain_on_overflow */
1604 ppc64_elf_unhandled_reloc, /* special_function */
1605 "R_PPC64_TPREL16_HIGHEST", /* name */
1606 FALSE, /* partial_inplace */
1607 0, /* src_mask */
1608 0xffff, /* dst_mask */
1609 FALSE), /* pcrel_offset */
1610
1611 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1612 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1613 48, /* rightshift */
1614 1, /* size (0 = byte, 1 = short, 2 = long) */
1615 16, /* bitsize */
1616 FALSE, /* pc_relative */
1617 0, /* bitpos */
1618 complain_overflow_dont, /* complain_on_overflow */
1619 ppc64_elf_unhandled_reloc, /* special_function */
1620 "R_PPC64_TPREL16_HIGHESTA", /* name */
1621 FALSE, /* partial_inplace */
1622 0, /* src_mask */
1623 0xffff, /* dst_mask */
1624 FALSE), /* pcrel_offset */
1625
1626 /* Like TPREL16, but for insns with a DS field. */
1627 HOWTO (R_PPC64_TPREL16_DS,
1628 0, /* rightshift */
1629 1, /* size (0 = byte, 1 = short, 2 = long) */
1630 16, /* bitsize */
1631 FALSE, /* pc_relative */
1632 0, /* bitpos */
1633 complain_overflow_signed, /* complain_on_overflow */
1634 ppc64_elf_unhandled_reloc, /* special_function */
1635 "R_PPC64_TPREL16_DS", /* name */
1636 FALSE, /* partial_inplace */
1637 0, /* src_mask */
1638 0xfffc, /* dst_mask */
1639 FALSE), /* pcrel_offset */
1640
1641 /* Like TPREL16_DS, but no overflow. */
1642 HOWTO (R_PPC64_TPREL16_LO_DS,
1643 0, /* rightshift */
1644 1, /* size (0 = byte, 1 = short, 2 = long) */
1645 16, /* bitsize */
1646 FALSE, /* pc_relative */
1647 0, /* bitpos */
1648 complain_overflow_dont, /* complain_on_overflow */
1649 ppc64_elf_unhandled_reloc, /* special_function */
1650 "R_PPC64_TPREL16_LO_DS", /* name */
1651 FALSE, /* partial_inplace */
1652 0, /* src_mask */
1653 0xfffc, /* dst_mask */
1654 FALSE), /* pcrel_offset */
1655
1656 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1657 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1658 to the first entry relative to the TOC base (r2). */
1659 HOWTO (R_PPC64_GOT_TLSGD16,
1660 0, /* rightshift */
1661 1, /* size (0 = byte, 1 = short, 2 = long) */
1662 16, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_signed, /* complain_on_overflow */
1666 ppc64_elf_unhandled_reloc, /* special_function */
1667 "R_PPC64_GOT_TLSGD16", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* Like GOT_TLSGD16, but no overflow. */
1674 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc64_elf_unhandled_reloc, /* special_function */
1682 "R_PPC64_GOT_TLSGD16_LO", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1689 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1690 16, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 FALSE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont, /* complain_on_overflow */
1696 ppc64_elf_unhandled_reloc, /* special_function */
1697 "R_PPC64_GOT_TLSGD16_HI", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 FALSE), /* pcrel_offset */
1702
1703 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1704 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 FALSE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 ppc64_elf_unhandled_reloc, /* special_function */
1712 "R_PPC64_GOT_TLSGD16_HA", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 FALSE), /* pcrel_offset */
1717
1718 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1719 with values (sym+add)@dtpmod and zero, and computes the offset to the
1720 first entry relative to the TOC base (r2). */
1721 HOWTO (R_PPC64_GOT_TLSLD16,
1722 0, /* rightshift */
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1724 16, /* bitsize */
1725 FALSE, /* pc_relative */
1726 0, /* bitpos */
1727 complain_overflow_signed, /* complain_on_overflow */
1728 ppc64_elf_unhandled_reloc, /* special_function */
1729 "R_PPC64_GOT_TLSLD16", /* name */
1730 FALSE, /* partial_inplace */
1731 0, /* src_mask */
1732 0xffff, /* dst_mask */
1733 FALSE), /* pcrel_offset */
1734
1735 /* Like GOT_TLSLD16, but no overflow. */
1736 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1737 0, /* rightshift */
1738 1, /* size (0 = byte, 1 = short, 2 = long) */
1739 16, /* bitsize */
1740 FALSE, /* pc_relative */
1741 0, /* bitpos */
1742 complain_overflow_dont, /* complain_on_overflow */
1743 ppc64_elf_unhandled_reloc, /* special_function */
1744 "R_PPC64_GOT_TLSLD16_LO", /* name */
1745 FALSE, /* partial_inplace */
1746 0, /* src_mask */
1747 0xffff, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1749
1750 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1751 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1752 16, /* rightshift */
1753 1, /* size (0 = byte, 1 = short, 2 = long) */
1754 16, /* bitsize */
1755 FALSE, /* pc_relative */
1756 0, /* bitpos */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 ppc64_elf_unhandled_reloc, /* special_function */
1759 "R_PPC64_GOT_TLSLD16_HI", /* name */
1760 FALSE, /* partial_inplace */
1761 0, /* src_mask */
1762 0xffff, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1764
1765 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1766 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1767 16, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_dont, /* complain_on_overflow */
1773 ppc64_elf_unhandled_reloc, /* special_function */
1774 "R_PPC64_GOT_TLSLD16_HA", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779
1780 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1781 the offset to the entry relative to the TOC base (r2). */
1782 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1783 0, /* rightshift */
1784 1, /* size (0 = byte, 1 = short, 2 = long) */
1785 16, /* bitsize */
1786 FALSE, /* pc_relative */
1787 0, /* bitpos */
1788 complain_overflow_signed, /* complain_on_overflow */
1789 ppc64_elf_unhandled_reloc, /* special_function */
1790 "R_PPC64_GOT_DTPREL16_DS", /* name */
1791 FALSE, /* partial_inplace */
1792 0, /* src_mask */
1793 0xfffc, /* dst_mask */
1794 FALSE), /* pcrel_offset */
1795
1796 /* Like GOT_DTPREL16_DS, but no overflow. */
1797 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1798 0, /* rightshift */
1799 1, /* size (0 = byte, 1 = short, 2 = long) */
1800 16, /* bitsize */
1801 FALSE, /* pc_relative */
1802 0, /* bitpos */
1803 complain_overflow_dont, /* complain_on_overflow */
1804 ppc64_elf_unhandled_reloc, /* special_function */
1805 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1806 FALSE, /* partial_inplace */
1807 0, /* src_mask */
1808 0xfffc, /* dst_mask */
1809 FALSE), /* pcrel_offset */
1810
1811 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1812 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1813 16, /* rightshift */
1814 1, /* size (0 = byte, 1 = short, 2 = long) */
1815 16, /* bitsize */
1816 FALSE, /* pc_relative */
1817 0, /* bitpos */
1818 complain_overflow_dont, /* complain_on_overflow */
1819 ppc64_elf_unhandled_reloc, /* special_function */
1820 "R_PPC64_GOT_DTPREL16_HI", /* name */
1821 FALSE, /* partial_inplace */
1822 0, /* src_mask */
1823 0xffff, /* dst_mask */
1824 FALSE), /* pcrel_offset */
1825
1826 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1827 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1828 16, /* rightshift */
1829 1, /* size (0 = byte, 1 = short, 2 = long) */
1830 16, /* bitsize */
1831 FALSE, /* pc_relative */
1832 0, /* bitpos */
1833 complain_overflow_dont, /* complain_on_overflow */
1834 ppc64_elf_unhandled_reloc, /* special_function */
1835 "R_PPC64_GOT_DTPREL16_HA", /* name */
1836 FALSE, /* partial_inplace */
1837 0, /* src_mask */
1838 0xffff, /* dst_mask */
1839 FALSE), /* pcrel_offset */
1840
1841 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1842 offset to the entry relative to the TOC base (r2). */
1843 HOWTO (R_PPC64_GOT_TPREL16_DS,
1844 0, /* rightshift */
1845 1, /* size (0 = byte, 1 = short, 2 = long) */
1846 16, /* bitsize */
1847 FALSE, /* pc_relative */
1848 0, /* bitpos */
1849 complain_overflow_signed, /* complain_on_overflow */
1850 ppc64_elf_unhandled_reloc, /* special_function */
1851 "R_PPC64_GOT_TPREL16_DS", /* name */
1852 FALSE, /* partial_inplace */
1853 0, /* src_mask */
1854 0xfffc, /* dst_mask */
1855 FALSE), /* pcrel_offset */
1856
1857 /* Like GOT_TPREL16_DS, but no overflow. */
1858 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1859 0, /* rightshift */
1860 1, /* size (0 = byte, 1 = short, 2 = long) */
1861 16, /* bitsize */
1862 FALSE, /* pc_relative */
1863 0, /* bitpos */
1864 complain_overflow_dont, /* complain_on_overflow */
1865 ppc64_elf_unhandled_reloc, /* special_function */
1866 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1867 FALSE, /* partial_inplace */
1868 0, /* src_mask */
1869 0xfffc, /* dst_mask */
1870 FALSE), /* pcrel_offset */
1871
1872 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1873 HOWTO (R_PPC64_GOT_TPREL16_HI,
1874 16, /* rightshift */
1875 1, /* size (0 = byte, 1 = short, 2 = long) */
1876 16, /* bitsize */
1877 FALSE, /* pc_relative */
1878 0, /* bitpos */
1879 complain_overflow_dont, /* complain_on_overflow */
1880 ppc64_elf_unhandled_reloc, /* special_function */
1881 "R_PPC64_GOT_TPREL16_HI", /* name */
1882 FALSE, /* partial_inplace */
1883 0, /* src_mask */
1884 0xffff, /* dst_mask */
1885 FALSE), /* pcrel_offset */
1886
1887 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1888 HOWTO (R_PPC64_GOT_TPREL16_HA,
1889 16, /* rightshift */
1890 1, /* size (0 = byte, 1 = short, 2 = long) */
1891 16, /* bitsize */
1892 FALSE, /* pc_relative */
1893 0, /* bitpos */
1894 complain_overflow_dont, /* complain_on_overflow */
1895 ppc64_elf_unhandled_reloc, /* special_function */
1896 "R_PPC64_GOT_TPREL16_HA", /* name */
1897 FALSE, /* partial_inplace */
1898 0, /* src_mask */
1899 0xffff, /* dst_mask */
1900 FALSE), /* pcrel_offset */
1901
1902 HOWTO (R_PPC64_JMP_IREL, /* type */
1903 0, /* rightshift */
1904 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1905 0, /* bitsize */
1906 FALSE, /* pc_relative */
1907 0, /* bitpos */
1908 complain_overflow_dont, /* complain_on_overflow */
1909 ppc64_elf_unhandled_reloc, /* special_function */
1910 "R_PPC64_JMP_IREL", /* name */
1911 FALSE, /* partial_inplace */
1912 0, /* src_mask */
1913 0, /* dst_mask */
1914 FALSE), /* pcrel_offset */
1915
1916 HOWTO (R_PPC64_IRELATIVE, /* type */
1917 0, /* rightshift */
1918 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1919 64, /* bitsize */
1920 FALSE, /* pc_relative */
1921 0, /* bitpos */
1922 complain_overflow_dont, /* complain_on_overflow */
1923 bfd_elf_generic_reloc, /* special_function */
1924 "R_PPC64_IRELATIVE", /* name */
1925 FALSE, /* partial_inplace */
1926 0, /* src_mask */
1927 ONES (64), /* dst_mask */
1928 FALSE), /* pcrel_offset */
1929
1930 /* A 16 bit relative relocation. */
1931 HOWTO (R_PPC64_REL16, /* type */
1932 0, /* rightshift */
1933 1, /* size (0 = byte, 1 = short, 2 = long) */
1934 16, /* bitsize */
1935 TRUE, /* pc_relative */
1936 0, /* bitpos */
1937 complain_overflow_bitfield, /* complain_on_overflow */
1938 bfd_elf_generic_reloc, /* special_function */
1939 "R_PPC64_REL16", /* name */
1940 FALSE, /* partial_inplace */
1941 0, /* src_mask */
1942 0xffff, /* dst_mask */
1943 TRUE), /* pcrel_offset */
1944
1945 /* A 16 bit relative relocation without overflow. */
1946 HOWTO (R_PPC64_REL16_LO, /* type */
1947 0, /* rightshift */
1948 1, /* size (0 = byte, 1 = short, 2 = long) */
1949 16, /* bitsize */
1950 TRUE, /* pc_relative */
1951 0, /* bitpos */
1952 complain_overflow_dont,/* complain_on_overflow */
1953 bfd_elf_generic_reloc, /* special_function */
1954 "R_PPC64_REL16_LO", /* name */
1955 FALSE, /* partial_inplace */
1956 0, /* src_mask */
1957 0xffff, /* dst_mask */
1958 TRUE), /* pcrel_offset */
1959
1960 /* The high order 16 bits of a relative address. */
1961 HOWTO (R_PPC64_REL16_HI, /* type */
1962 16, /* rightshift */
1963 1, /* size (0 = byte, 1 = short, 2 = long) */
1964 16, /* bitsize */
1965 TRUE, /* pc_relative */
1966 0, /* bitpos */
1967 complain_overflow_dont, /* complain_on_overflow */
1968 bfd_elf_generic_reloc, /* special_function */
1969 "R_PPC64_REL16_HI", /* name */
1970 FALSE, /* partial_inplace */
1971 0, /* src_mask */
1972 0xffff, /* dst_mask */
1973 TRUE), /* pcrel_offset */
1974
1975 /* The high order 16 bits of a relative address, plus 1 if the contents of
1976 the low 16 bits, treated as a signed number, is negative. */
1977 HOWTO (R_PPC64_REL16_HA, /* type */
1978 16, /* rightshift */
1979 1, /* size (0 = byte, 1 = short, 2 = long) */
1980 16, /* bitsize */
1981 TRUE, /* pc_relative */
1982 0, /* bitpos */
1983 complain_overflow_dont, /* complain_on_overflow */
1984 ppc64_elf_ha_reloc, /* special_function */
1985 "R_PPC64_REL16_HA", /* name */
1986 FALSE, /* partial_inplace */
1987 0, /* src_mask */
1988 0xffff, /* dst_mask */
1989 TRUE), /* pcrel_offset */
1990
1991 /* GNU extension to record C++ vtable hierarchy. */
1992 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1993 0, /* rightshift */
1994 0, /* size (0 = byte, 1 = short, 2 = long) */
1995 0, /* bitsize */
1996 FALSE, /* pc_relative */
1997 0, /* bitpos */
1998 complain_overflow_dont, /* complain_on_overflow */
1999 NULL, /* special_function */
2000 "R_PPC64_GNU_VTINHERIT", /* name */
2001 FALSE, /* partial_inplace */
2002 0, /* src_mask */
2003 0, /* dst_mask */
2004 FALSE), /* pcrel_offset */
2005
2006 /* GNU extension to record C++ vtable member usage. */
2007 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2008 0, /* rightshift */
2009 0, /* size (0 = byte, 1 = short, 2 = long) */
2010 0, /* bitsize */
2011 FALSE, /* pc_relative */
2012 0, /* bitpos */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 NULL, /* special_function */
2015 "R_PPC64_GNU_VTENTRY", /* name */
2016 FALSE, /* partial_inplace */
2017 0, /* src_mask */
2018 0, /* dst_mask */
2019 FALSE), /* pcrel_offset */
2020 };
2021
2022 \f
2023 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2024 be done. */
2025
2026 static void
2027 ppc_howto_init (void)
2028 {
2029 unsigned int i, type;
2030
2031 for (i = 0;
2032 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2033 i++)
2034 {
2035 type = ppc64_elf_howto_raw[i].type;
2036 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2037 / sizeof (ppc64_elf_howto_table[0])));
2038 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2039 }
2040 }
2041
2042 static reloc_howto_type *
2043 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2044 bfd_reloc_code_real_type code)
2045 {
2046 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2047
2048 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2049 /* Initialize howto table if needed. */
2050 ppc_howto_init ();
2051
2052 switch (code)
2053 {
2054 default:
2055 return NULL;
2056
2057 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2058 break;
2059 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2060 break;
2061 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2062 break;
2063 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2064 break;
2065 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2066 break;
2067 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2068 break;
2069 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2070 break;
2071 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2072 break;
2073 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2074 break;
2075 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2076 break;
2077 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2078 break;
2079 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2080 break;
2081 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2082 break;
2083 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2084 break;
2085 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2086 break;
2087 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2088 break;
2089 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2090 break;
2091 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2092 break;
2093 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2094 break;
2095 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2096 break;
2097 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2098 break;
2099 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2100 break;
2101 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2102 break;
2103 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2104 break;
2105 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2106 break;
2107 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2108 break;
2109 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2110 break;
2111 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2112 break;
2113 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2114 break;
2115 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2116 break;
2117 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2118 break;
2119 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2120 break;
2121 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2122 break;
2123 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2124 break;
2125 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2126 break;
2127 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2128 break;
2129 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2130 break;
2131 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2132 break;
2133 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2134 break;
2135 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2136 break;
2137 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2138 break;
2139 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2140 break;
2141 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2142 break;
2143 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2144 break;
2145 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2146 break;
2147 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2150 break;
2151 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2152 break;
2153 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2154 break;
2155 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2156 break;
2157 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2158 break;
2159 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2160 break;
2161 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2162 break;
2163 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2164 break;
2165 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2166 break;
2167 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2168 break;
2169 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2170 break;
2171 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2172 break;
2173 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2174 break;
2175 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2176 break;
2177 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2178 break;
2179 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2180 break;
2181 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2182 break;
2183 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2184 break;
2185 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2186 break;
2187 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2188 break;
2189 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2190 break;
2191 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2192 break;
2193 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2194 break;
2195 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2196 break;
2197 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2198 break;
2199 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2200 break;
2201 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2202 break;
2203 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2204 break;
2205 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2206 break;
2207 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2208 break;
2209 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2210 break;
2211 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2212 break;
2213 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2214 break;
2215 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2216 break;
2217 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2218 break;
2219 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2220 break;
2221 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2222 break;
2223 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2224 break;
2225 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2226 break;
2227 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2228 break;
2229 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2230 break;
2231 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2232 break;
2233 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2234 break;
2235 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2236 break;
2237 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2238 break;
2239 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2240 break;
2241 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2242 break;
2243 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2244 break;
2245 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2246 break;
2247 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2248 break;
2249 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2250 break;
2251 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2252 break;
2253 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2254 break;
2255 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2256 break;
2257 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2258 break;
2259 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2260 break;
2261 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2262 break;
2263 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2264 break;
2265 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2266 break;
2267 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2268 break;
2269 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2270 break;
2271 }
2272
2273 return ppc64_elf_howto_table[r];
2274 };
2275
2276 static reloc_howto_type *
2277 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2278 const char *r_name)
2279 {
2280 unsigned int i;
2281
2282 for (i = 0;
2283 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2284 i++)
2285 if (ppc64_elf_howto_raw[i].name != NULL
2286 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2287 return &ppc64_elf_howto_raw[i];
2288
2289 return NULL;
2290 }
2291
2292 /* Set the howto pointer for a PowerPC ELF reloc. */
2293
2294 static void
2295 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2296 Elf_Internal_Rela *dst)
2297 {
2298 unsigned int type;
2299
2300 /* Initialize howto table if needed. */
2301 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2302 ppc_howto_init ();
2303
2304 type = ELF64_R_TYPE (dst->r_info);
2305 if (type >= (sizeof (ppc64_elf_howto_table)
2306 / sizeof (ppc64_elf_howto_table[0])))
2307 {
2308 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2309 abfd, (int) type);
2310 type = R_PPC64_NONE;
2311 }
2312 cache_ptr->howto = ppc64_elf_howto_table[type];
2313 }
2314
2315 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2316
2317 static bfd_reloc_status_type
2318 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2319 void *data, asection *input_section,
2320 bfd *output_bfd, char **error_message)
2321 {
2322 /* If this is a relocatable link (output_bfd test tells us), just
2323 call the generic function. Any adjustment will be done at final
2324 link time. */
2325 if (output_bfd != NULL)
2326 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2327 input_section, output_bfd, error_message);
2328
2329 /* Adjust the addend for sign extension of the low 16 bits.
2330 We won't actually be using the low 16 bits, so trashing them
2331 doesn't matter. */
2332 reloc_entry->addend += 0x8000;
2333 return bfd_reloc_continue;
2334 }
2335
2336 static bfd_reloc_status_type
2337 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2340 {
2341 if (output_bfd != NULL)
2342 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2343 input_section, output_bfd, error_message);
2344
2345 if (strcmp (symbol->section->name, ".opd") == 0
2346 && (symbol->section->owner->flags & DYNAMIC) == 0)
2347 {
2348 bfd_vma dest = opd_entry_value (symbol->section,
2349 symbol->value + reloc_entry->addend,
2350 NULL, NULL, FALSE);
2351 if (dest != (bfd_vma) -1)
2352 reloc_entry->addend = dest - (symbol->value
2353 + symbol->section->output_section->vma
2354 + symbol->section->output_offset);
2355 }
2356 return bfd_reloc_continue;
2357 }
2358
2359 static bfd_reloc_status_type
2360 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2361 void *data, asection *input_section,
2362 bfd *output_bfd, char **error_message)
2363 {
2364 long insn;
2365 enum elf_ppc64_reloc_type r_type;
2366 bfd_size_type octets;
2367 /* Assume 'at' branch hints. */
2368 bfd_boolean is_isa_v2 = TRUE;
2369
2370 /* If this is a relocatable link (output_bfd test tells us), just
2371 call the generic function. Any adjustment will be done at final
2372 link time. */
2373 if (output_bfd != NULL)
2374 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2375 input_section, output_bfd, error_message);
2376
2377 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2378 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2379 insn &= ~(0x01 << 21);
2380 r_type = reloc_entry->howto->type;
2381 if (r_type == R_PPC64_ADDR14_BRTAKEN
2382 || r_type == R_PPC64_REL14_BRTAKEN)
2383 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2384
2385 if (is_isa_v2)
2386 {
2387 /* Set 'a' bit. This is 0b00010 in BO field for branch
2388 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2389 for branch on CTR insns (BO == 1a00t or 1a01t). */
2390 if ((insn & (0x14 << 21)) == (0x04 << 21))
2391 insn |= 0x02 << 21;
2392 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2393 insn |= 0x08 << 21;
2394 else
2395 goto out;
2396 }
2397 else
2398 {
2399 bfd_vma target = 0;
2400 bfd_vma from;
2401
2402 if (!bfd_is_com_section (symbol->section))
2403 target = symbol->value;
2404 target += symbol->section->output_section->vma;
2405 target += symbol->section->output_offset;
2406 target += reloc_entry->addend;
2407
2408 from = (reloc_entry->address
2409 + input_section->output_offset
2410 + input_section->output_section->vma);
2411
2412 /* Invert 'y' bit if not the default. */
2413 if ((bfd_signed_vma) (target - from) < 0)
2414 insn ^= 0x01 << 21;
2415 }
2416 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2417 out:
2418 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2419 input_section, output_bfd, error_message);
2420 }
2421
2422 static bfd_reloc_status_type
2423 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2424 void *data, asection *input_section,
2425 bfd *output_bfd, char **error_message)
2426 {
2427 /* If this is a relocatable link (output_bfd test tells us), just
2428 call the generic function. Any adjustment will be done at final
2429 link time. */
2430 if (output_bfd != NULL)
2431 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2432 input_section, output_bfd, error_message);
2433
2434 /* Subtract the symbol section base address. */
2435 reloc_entry->addend -= symbol->section->output_section->vma;
2436 return bfd_reloc_continue;
2437 }
2438
2439 static bfd_reloc_status_type
2440 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2441 void *data, asection *input_section,
2442 bfd *output_bfd, char **error_message)
2443 {
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2446 link time. */
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2450
2451 /* Subtract the symbol section base address. */
2452 reloc_entry->addend -= symbol->section->output_section->vma;
2453
2454 /* Adjust the addend for sign extension of the low 16 bits. */
2455 reloc_entry->addend += 0x8000;
2456 return bfd_reloc_continue;
2457 }
2458
2459 static bfd_reloc_status_type
2460 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2461 void *data, asection *input_section,
2462 bfd *output_bfd, char **error_message)
2463 {
2464 bfd_vma TOCstart;
2465
2466 /* If this is a relocatable link (output_bfd test tells us), just
2467 call the generic function. Any adjustment will be done at final
2468 link time. */
2469 if (output_bfd != NULL)
2470 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2471 input_section, output_bfd, error_message);
2472
2473 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2474 if (TOCstart == 0)
2475 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2476
2477 /* Subtract the TOC base address. */
2478 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2479 return bfd_reloc_continue;
2480 }
2481
2482 static bfd_reloc_status_type
2483 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2484 void *data, asection *input_section,
2485 bfd *output_bfd, char **error_message)
2486 {
2487 bfd_vma TOCstart;
2488
2489 /* If this is a relocatable link (output_bfd test tells us), just
2490 call the generic function. Any adjustment will be done at final
2491 link time. */
2492 if (output_bfd != NULL)
2493 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2494 input_section, output_bfd, error_message);
2495
2496 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2497 if (TOCstart == 0)
2498 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2499
2500 /* Subtract the TOC base address. */
2501 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2502
2503 /* Adjust the addend for sign extension of the low 16 bits. */
2504 reloc_entry->addend += 0x8000;
2505 return bfd_reloc_continue;
2506 }
2507
2508 static bfd_reloc_status_type
2509 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2512 {
2513 bfd_vma TOCstart;
2514 bfd_size_type octets;
2515
2516 /* If this is a relocatable link (output_bfd test tells us), just
2517 call the generic function. Any adjustment will be done at final
2518 link time. */
2519 if (output_bfd != NULL)
2520 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2521 input_section, output_bfd, error_message);
2522
2523 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2524 if (TOCstart == 0)
2525 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2526
2527 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2528 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2529 return bfd_reloc_ok;
2530 }
2531
2532 static bfd_reloc_status_type
2533 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2534 void *data, asection *input_section,
2535 bfd *output_bfd, char **error_message)
2536 {
2537 /* If this is a relocatable link (output_bfd test tells us), just
2538 call the generic function. Any adjustment will be done at final
2539 link time. */
2540 if (output_bfd != NULL)
2541 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2542 input_section, output_bfd, error_message);
2543
2544 if (error_message != NULL)
2545 {
2546 static char buf[60];
2547 sprintf (buf, "generic linker can't handle %s",
2548 reloc_entry->howto->name);
2549 *error_message = buf;
2550 }
2551 return bfd_reloc_dangerous;
2552 }
2553
2554 /* Track GOT entries needed for a given symbol. We might need more
2555 than one got entry per symbol. */
2556 struct got_entry
2557 {
2558 struct got_entry *next;
2559
2560 /* The symbol addend that we'll be placing in the GOT. */
2561 bfd_vma addend;
2562
2563 /* Unlike other ELF targets, we use separate GOT entries for the same
2564 symbol referenced from different input files. This is to support
2565 automatic multiple TOC/GOT sections, where the TOC base can vary
2566 from one input file to another. After partitioning into TOC groups
2567 we merge entries within the group.
2568
2569 Point to the BFD owning this GOT entry. */
2570 bfd *owner;
2571
2572 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2573 TLS_TPREL or TLS_DTPREL for tls entries. */
2574 unsigned char tls_type;
2575
2576 /* Non-zero if got.ent points to real entry. */
2577 unsigned char is_indirect;
2578
2579 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2580 union
2581 {
2582 bfd_signed_vma refcount;
2583 bfd_vma offset;
2584 struct got_entry *ent;
2585 } got;
2586 };
2587
2588 /* The same for PLT. */
2589 struct plt_entry
2590 {
2591 struct plt_entry *next;
2592
2593 bfd_vma addend;
2594
2595 union
2596 {
2597 bfd_signed_vma refcount;
2598 bfd_vma offset;
2599 } plt;
2600 };
2601
2602 struct ppc64_elf_obj_tdata
2603 {
2604 struct elf_obj_tdata elf;
2605
2606 /* Shortcuts to dynamic linker sections. */
2607 asection *got;
2608 asection *relgot;
2609
2610 /* Used during garbage collection. We attach global symbols defined
2611 on removed .opd entries to this section so that the sym is removed. */
2612 asection *deleted_section;
2613
2614 /* TLS local dynamic got entry handling. Support for multiple GOT
2615 sections means we potentially need one of these for each input bfd. */
2616 struct got_entry tlsld_got;
2617
2618 /* A copy of relocs before they are modified for --emit-relocs. */
2619 Elf_Internal_Rela *opd_relocs;
2620
2621 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2622 the reloc to be in the range -32768 to 32767. */
2623 unsigned int has_small_toc_reloc : 1;
2624
2625 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2626 instruction not one we handle. */
2627 unsigned int unexpected_toc_insn : 1;
2628 };
2629
2630 #define ppc64_elf_tdata(bfd) \
2631 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2632
2633 #define ppc64_tlsld_got(bfd) \
2634 (&ppc64_elf_tdata (bfd)->tlsld_got)
2635
2636 #define is_ppc64_elf(bfd) \
2637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2638 && elf_object_id (bfd) == PPC64_ELF_DATA)
2639
2640 /* Override the generic function because we store some extras. */
2641
2642 static bfd_boolean
2643 ppc64_elf_mkobject (bfd *abfd)
2644 {
2645 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2646 PPC64_ELF_DATA);
2647 }
2648
2649 /* Fix bad default arch selected for a 64 bit input bfd when the
2650 default is 32 bit. */
2651
2652 static bfd_boolean
2653 ppc64_elf_object_p (bfd *abfd)
2654 {
2655 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2656 {
2657 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2658
2659 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2660 {
2661 /* Relies on arch after 32 bit default being 64 bit default. */
2662 abfd->arch_info = abfd->arch_info->next;
2663 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2664 }
2665 }
2666 return TRUE;
2667 }
2668
2669 /* Support for core dump NOTE sections. */
2670
2671 static bfd_boolean
2672 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2673 {
2674 size_t offset, size;
2675
2676 if (note->descsz != 504)
2677 return FALSE;
2678
2679 /* pr_cursig */
2680 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2681
2682 /* pr_pid */
2683 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2684
2685 /* pr_reg */
2686 offset = 112;
2687 size = 384;
2688
2689 /* Make a ".reg/999" section. */
2690 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2691 size, note->descpos + offset);
2692 }
2693
2694 static bfd_boolean
2695 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2696 {
2697 if (note->descsz != 136)
2698 return FALSE;
2699
2700 elf_tdata (abfd)->core->pid
2701 = bfd_get_32 (abfd, note->descdata + 24);
2702 elf_tdata (abfd)->core->program
2703 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2704 elf_tdata (abfd)->core->command
2705 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2706
2707 return TRUE;
2708 }
2709
2710 static char *
2711 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2712 ...)
2713 {
2714 switch (note_type)
2715 {
2716 default:
2717 return NULL;
2718
2719 case NT_PRPSINFO:
2720 {
2721 char data[136];
2722 va_list ap;
2723
2724 va_start (ap, note_type);
2725 memset (data, 0, sizeof (data));
2726 strncpy (data + 40, va_arg (ap, const char *), 16);
2727 strncpy (data + 56, va_arg (ap, const char *), 80);
2728 va_end (ap);
2729 return elfcore_write_note (abfd, buf, bufsiz,
2730 "CORE", note_type, data, sizeof (data));
2731 }
2732
2733 case NT_PRSTATUS:
2734 {
2735 char data[504];
2736 va_list ap;
2737 long pid;
2738 int cursig;
2739 const void *greg;
2740
2741 va_start (ap, note_type);
2742 memset (data, 0, 112);
2743 pid = va_arg (ap, long);
2744 bfd_put_32 (abfd, pid, data + 32);
2745 cursig = va_arg (ap, int);
2746 bfd_put_16 (abfd, cursig, data + 12);
2747 greg = va_arg (ap, const void *);
2748 memcpy (data + 112, greg, 384);
2749 memset (data + 496, 0, 8);
2750 va_end (ap);
2751 return elfcore_write_note (abfd, buf, bufsiz,
2752 "CORE", note_type, data, sizeof (data));
2753 }
2754 }
2755 }
2756
2757 /* Add extra PPC sections. */
2758
2759 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2760 {
2761 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2762 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2766 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2767 { NULL, 0, 0, 0, 0 }
2768 };
2769
2770 enum _ppc64_sec_type {
2771 sec_normal = 0,
2772 sec_opd = 1,
2773 sec_toc = 2
2774 };
2775
2776 struct _ppc64_elf_section_data
2777 {
2778 struct bfd_elf_section_data elf;
2779
2780 union
2781 {
2782 /* An array with one entry for each opd function descriptor. */
2783 struct _opd_sec_data
2784 {
2785 /* Points to the function code section for local opd entries. */
2786 asection **func_sec;
2787
2788 /* After editing .opd, adjust references to opd local syms. */
2789 long *adjust;
2790 } opd;
2791
2792 /* An array for toc sections, indexed by offset/8. */
2793 struct _toc_sec_data
2794 {
2795 /* Specifies the relocation symbol index used at a given toc offset. */
2796 unsigned *symndx;
2797
2798 /* And the relocation addend. */
2799 bfd_vma *add;
2800 } toc;
2801 } u;
2802
2803 enum _ppc64_sec_type sec_type:2;
2804
2805 /* Flag set when small branches are detected. Used to
2806 select suitable defaults for the stub group size. */
2807 unsigned int has_14bit_branch:1;
2808 };
2809
2810 #define ppc64_elf_section_data(sec) \
2811 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2812
2813 static bfd_boolean
2814 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2815 {
2816 if (!sec->used_by_bfd)
2817 {
2818 struct _ppc64_elf_section_data *sdata;
2819 bfd_size_type amt = sizeof (*sdata);
2820
2821 sdata = bfd_zalloc (abfd, amt);
2822 if (sdata == NULL)
2823 return FALSE;
2824 sec->used_by_bfd = sdata;
2825 }
2826
2827 return _bfd_elf_new_section_hook (abfd, sec);
2828 }
2829
2830 static struct _opd_sec_data *
2831 get_opd_info (asection * sec)
2832 {
2833 if (sec != NULL
2834 && ppc64_elf_section_data (sec) != NULL
2835 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2836 return &ppc64_elf_section_data (sec)->u.opd;
2837 return NULL;
2838 }
2839 \f
2840 /* Parameters for the qsort hook. */
2841 static bfd_boolean synthetic_relocatable;
2842
2843 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2844
2845 static int
2846 compare_symbols (const void *ap, const void *bp)
2847 {
2848 const asymbol *a = * (const asymbol **) ap;
2849 const asymbol *b = * (const asymbol **) bp;
2850
2851 /* Section symbols first. */
2852 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2853 return -1;
2854 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2855 return 1;
2856
2857 /* then .opd symbols. */
2858 if (strcmp (a->section->name, ".opd") == 0
2859 && strcmp (b->section->name, ".opd") != 0)
2860 return -1;
2861 if (strcmp (a->section->name, ".opd") != 0
2862 && strcmp (b->section->name, ".opd") == 0)
2863 return 1;
2864
2865 /* then other code symbols. */
2866 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2867 == (SEC_CODE | SEC_ALLOC)
2868 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2870 return -1;
2871
2872 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2873 != (SEC_CODE | SEC_ALLOC)
2874 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2875 == (SEC_CODE | SEC_ALLOC))
2876 return 1;
2877
2878 if (synthetic_relocatable)
2879 {
2880 if (a->section->id < b->section->id)
2881 return -1;
2882
2883 if (a->section->id > b->section->id)
2884 return 1;
2885 }
2886
2887 if (a->value + a->section->vma < b->value + b->section->vma)
2888 return -1;
2889
2890 if (a->value + a->section->vma > b->value + b->section->vma)
2891 return 1;
2892
2893 /* For syms with the same value, prefer strong dynamic global function
2894 syms over other syms. */
2895 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2896 return -1;
2897
2898 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2899 return 1;
2900
2901 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2902 return -1;
2903
2904 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2905 return 1;
2906
2907 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2908 return -1;
2909
2910 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2911 return 1;
2912
2913 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2914 return -1;
2915
2916 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2917 return 1;
2918
2919 return 0;
2920 }
2921
2922 /* Search SYMS for a symbol of the given VALUE. */
2923
2924 static asymbol *
2925 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2926 {
2927 long mid;
2928
2929 if (id == -1)
2930 {
2931 while (lo < hi)
2932 {
2933 mid = (lo + hi) >> 1;
2934 if (syms[mid]->value + syms[mid]->section->vma < value)
2935 lo = mid + 1;
2936 else if (syms[mid]->value + syms[mid]->section->vma > value)
2937 hi = mid;
2938 else
2939 return syms[mid];
2940 }
2941 }
2942 else
2943 {
2944 while (lo < hi)
2945 {
2946 mid = (lo + hi) >> 1;
2947 if (syms[mid]->section->id < id)
2948 lo = mid + 1;
2949 else if (syms[mid]->section->id > id)
2950 hi = mid;
2951 else if (syms[mid]->value < value)
2952 lo = mid + 1;
2953 else if (syms[mid]->value > value)
2954 hi = mid;
2955 else
2956 return syms[mid];
2957 }
2958 }
2959 return NULL;
2960 }
2961
2962 static bfd_boolean
2963 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2964 {
2965 bfd_vma vma = *(bfd_vma *) ptr;
2966 return ((section->flags & SEC_ALLOC) != 0
2967 && section->vma <= vma
2968 && vma < section->vma + section->size);
2969 }
2970
2971 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2972 entry syms. Also generate @plt symbols for the glink branch table. */
2973
2974 static long
2975 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2976 long static_count, asymbol **static_syms,
2977 long dyn_count, asymbol **dyn_syms,
2978 asymbol **ret)
2979 {
2980 asymbol *s;
2981 long i;
2982 long count;
2983 char *names;
2984 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2985 asection *opd;
2986 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2987 asymbol **syms;
2988
2989 *ret = NULL;
2990
2991 opd = bfd_get_section_by_name (abfd, ".opd");
2992 if (opd == NULL)
2993 return 0;
2994
2995 symcount = static_count;
2996 if (!relocatable)
2997 symcount += dyn_count;
2998 if (symcount == 0)
2999 return 0;
3000
3001 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3002 if (syms == NULL)
3003 return -1;
3004
3005 if (!relocatable && static_count != 0 && dyn_count != 0)
3006 {
3007 /* Use both symbol tables. */
3008 memcpy (syms, static_syms, static_count * sizeof (*syms));
3009 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3010 }
3011 else if (!relocatable && static_count == 0)
3012 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3013 else
3014 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3015
3016 synthetic_relocatable = relocatable;
3017 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3018
3019 if (!relocatable && symcount > 1)
3020 {
3021 long j;
3022 /* Trim duplicate syms, since we may have merged the normal and
3023 dynamic symbols. Actually, we only care about syms that have
3024 different values, so trim any with the same value. */
3025 for (i = 1, j = 1; i < symcount; ++i)
3026 if (syms[i - 1]->value + syms[i - 1]->section->vma
3027 != syms[i]->value + syms[i]->section->vma)
3028 syms[j++] = syms[i];
3029 symcount = j;
3030 }
3031
3032 i = 0;
3033 if (strcmp (syms[i]->section->name, ".opd") == 0)
3034 ++i;
3035 codesecsym = i;
3036
3037 for (; i < symcount; ++i)
3038 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3039 != (SEC_CODE | SEC_ALLOC))
3040 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3041 break;
3042 codesecsymend = i;
3043
3044 for (; i < symcount; ++i)
3045 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3046 break;
3047 secsymend = i;
3048
3049 for (; i < symcount; ++i)
3050 if (strcmp (syms[i]->section->name, ".opd") != 0)
3051 break;
3052 opdsymend = i;
3053
3054 for (; i < symcount; ++i)
3055 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3056 != (SEC_CODE | SEC_ALLOC))
3057 break;
3058 symcount = i;
3059
3060 count = 0;
3061
3062 if (relocatable)
3063 {
3064 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3065 arelent *r;
3066 size_t size;
3067 long relcount;
3068
3069 if (opdsymend == secsymend)
3070 goto done;
3071
3072 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3073 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3074 if (relcount == 0)
3075 goto done;
3076
3077 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3078 {
3079 count = -1;
3080 goto done;
3081 }
3082
3083 size = 0;
3084 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3085 {
3086 asymbol *sym;
3087
3088 while (r < opd->relocation + relcount
3089 && r->address < syms[i]->value + opd->vma)
3090 ++r;
3091
3092 if (r == opd->relocation + relcount)
3093 break;
3094
3095 if (r->address != syms[i]->value + opd->vma)
3096 continue;
3097
3098 if (r->howto->type != R_PPC64_ADDR64)
3099 continue;
3100
3101 sym = *r->sym_ptr_ptr;
3102 if (!sym_exists_at (syms, opdsymend, symcount,
3103 sym->section->id, sym->value + r->addend))
3104 {
3105 ++count;
3106 size += sizeof (asymbol);
3107 size += strlen (syms[i]->name) + 2;
3108 }
3109 }
3110
3111 s = *ret = bfd_malloc (size);
3112 if (s == NULL)
3113 {
3114 count = -1;
3115 goto done;
3116 }
3117
3118 names = (char *) (s + count);
3119
3120 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3121 {
3122 asymbol *sym;
3123
3124 while (r < opd->relocation + relcount
3125 && r->address < syms[i]->value + opd->vma)
3126 ++r;
3127
3128 if (r == opd->relocation + relcount)
3129 break;
3130
3131 if (r->address != syms[i]->value + opd->vma)
3132 continue;
3133
3134 if (r->howto->type != R_PPC64_ADDR64)
3135 continue;
3136
3137 sym = *r->sym_ptr_ptr;
3138 if (!sym_exists_at (syms, opdsymend, symcount,
3139 sym->section->id, sym->value + r->addend))
3140 {
3141 size_t len;
3142
3143 *s = *syms[i];
3144 s->flags |= BSF_SYNTHETIC;
3145 s->section = sym->section;
3146 s->value = sym->value + r->addend;
3147 s->name = names;
3148 *names++ = '.';
3149 len = strlen (syms[i]->name);
3150 memcpy (names, syms[i]->name, len + 1);
3151 names += len + 1;
3152 /* Have udata.p point back to the original symbol this
3153 synthetic symbol was derived from. */
3154 s->udata.p = syms[i];
3155 s++;
3156 }
3157 }
3158 }
3159 else
3160 {
3161 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3162 bfd_byte *contents;
3163 size_t size;
3164 long plt_count = 0;
3165 bfd_vma glink_vma = 0, resolv_vma = 0;
3166 asection *dynamic, *glink = NULL, *relplt = NULL;
3167 arelent *p;
3168
3169 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3170 {
3171 if (contents)
3172 {
3173 free_contents_and_exit:
3174 free (contents);
3175 }
3176 count = -1;
3177 goto done;
3178 }
3179
3180 size = 0;
3181 for (i = secsymend; i < opdsymend; ++i)
3182 {
3183 bfd_vma ent;
3184
3185 /* Ignore bogus symbols. */
3186 if (syms[i]->value > opd->size - 8)
3187 continue;
3188
3189 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3190 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3191 {
3192 ++count;
3193 size += sizeof (asymbol);
3194 size += strlen (syms[i]->name) + 2;
3195 }
3196 }
3197
3198 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3199 if (dyn_count != 0
3200 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3201 {
3202 bfd_byte *dynbuf, *extdyn, *extdynend;
3203 size_t extdynsize;
3204 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3205
3206 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3207 goto free_contents_and_exit;
3208
3209 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3210 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3211
3212 extdyn = dynbuf;
3213 extdynend = extdyn + dynamic->size;
3214 for (; extdyn < extdynend; extdyn += extdynsize)
3215 {
3216 Elf_Internal_Dyn dyn;
3217 (*swap_dyn_in) (abfd, extdyn, &dyn);
3218
3219 if (dyn.d_tag == DT_NULL)
3220 break;
3221
3222 if (dyn.d_tag == DT_PPC64_GLINK)
3223 {
3224 /* The first glink stub starts at offset 32; see comment in
3225 ppc64_elf_finish_dynamic_sections. */
3226 glink_vma = dyn.d_un.d_val + 32;
3227 /* The .glink section usually does not survive the final
3228 link; search for the section (usually .text) where the
3229 glink stubs now reside. */
3230 glink = bfd_sections_find_if (abfd, section_covers_vma,
3231 &glink_vma);
3232 break;
3233 }
3234 }
3235
3236 free (dynbuf);
3237 }
3238
3239 if (glink != NULL)
3240 {
3241 /* Determine __glink trampoline by reading the relative branch
3242 from the first glink stub. */
3243 bfd_byte buf[4];
3244 if (bfd_get_section_contents (abfd, glink, buf,
3245 glink_vma + 4 - glink->vma, 4))
3246 {
3247 unsigned int insn = bfd_get_32 (abfd, buf);
3248 insn ^= B_DOT;
3249 if ((insn & ~0x3fffffc) == 0)
3250 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3251 }
3252
3253 if (resolv_vma)
3254 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3255
3256 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3257 if (relplt != NULL)
3258 {
3259 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3260 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3261 goto free_contents_and_exit;
3262
3263 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3264 size += plt_count * sizeof (asymbol);
3265
3266 p = relplt->relocation;
3267 for (i = 0; i < plt_count; i++, p++)
3268 {
3269 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3270 if (p->addend != 0)
3271 size += sizeof ("+0x") - 1 + 16;
3272 }
3273 }
3274 }
3275
3276 s = *ret = bfd_malloc (size);
3277 if (s == NULL)
3278 goto free_contents_and_exit;
3279
3280 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3281
3282 for (i = secsymend; i < opdsymend; ++i)
3283 {
3284 bfd_vma ent;
3285
3286 if (syms[i]->value > opd->size - 8)
3287 continue;
3288
3289 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3290 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3291 {
3292 long lo, hi;
3293 size_t len;
3294 asection *sec = abfd->sections;
3295
3296 *s = *syms[i];
3297 lo = codesecsym;
3298 hi = codesecsymend;
3299 while (lo < hi)
3300 {
3301 long mid = (lo + hi) >> 1;
3302 if (syms[mid]->section->vma < ent)
3303 lo = mid + 1;
3304 else if (syms[mid]->section->vma > ent)
3305 hi = mid;
3306 else
3307 {
3308 sec = syms[mid]->section;
3309 break;
3310 }
3311 }
3312
3313 if (lo >= hi && lo > codesecsym)
3314 sec = syms[lo - 1]->section;
3315
3316 for (; sec != NULL; sec = sec->next)
3317 {
3318 if (sec->vma > ent)
3319 break;
3320 /* SEC_LOAD may not be set if SEC is from a separate debug
3321 info file. */
3322 if ((sec->flags & SEC_ALLOC) == 0)
3323 break;
3324 if ((sec->flags & SEC_CODE) != 0)
3325 s->section = sec;
3326 }
3327 s->flags |= BSF_SYNTHETIC;
3328 s->value = ent - s->section->vma;
3329 s->name = names;
3330 *names++ = '.';
3331 len = strlen (syms[i]->name);
3332 memcpy (names, syms[i]->name, len + 1);
3333 names += len + 1;
3334 /* Have udata.p point back to the original symbol this
3335 synthetic symbol was derived from. */
3336 s->udata.p = syms[i];
3337 s++;
3338 }
3339 }
3340 free (contents);
3341
3342 if (glink != NULL && relplt != NULL)
3343 {
3344 if (resolv_vma)
3345 {
3346 /* Add a symbol for the main glink trampoline. */
3347 memset (s, 0, sizeof *s);
3348 s->the_bfd = abfd;
3349 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3350 s->section = glink;
3351 s->value = resolv_vma - glink->vma;
3352 s->name = names;
3353 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3354 names += sizeof ("__glink_PLTresolve");
3355 s++;
3356 count++;
3357 }
3358
3359 /* FIXME: It would be very much nicer to put sym@plt on the
3360 stub rather than on the glink branch table entry. The
3361 objdump disassembler would then use a sensible symbol
3362 name on plt calls. The difficulty in doing so is
3363 a) finding the stubs, and,
3364 b) matching stubs against plt entries, and,
3365 c) there can be multiple stubs for a given plt entry.
3366
3367 Solving (a) could be done by code scanning, but older
3368 ppc64 binaries used different stubs to current code.
3369 (b) is the tricky one since you need to known the toc
3370 pointer for at least one function that uses a pic stub to
3371 be able to calculate the plt address referenced.
3372 (c) means gdb would need to set multiple breakpoints (or
3373 find the glink branch itself) when setting breakpoints
3374 for pending shared library loads. */
3375 p = relplt->relocation;
3376 for (i = 0; i < plt_count; i++, p++)
3377 {
3378 size_t len;
3379
3380 *s = **p->sym_ptr_ptr;
3381 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3382 we are defining a symbol, ensure one of them is set. */
3383 if ((s->flags & BSF_LOCAL) == 0)
3384 s->flags |= BSF_GLOBAL;
3385 s->flags |= BSF_SYNTHETIC;
3386 s->section = glink;
3387 s->value = glink_vma - glink->vma;
3388 s->name = names;
3389 s->udata.p = NULL;
3390 len = strlen ((*p->sym_ptr_ptr)->name);
3391 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3392 names += len;
3393 if (p->addend != 0)
3394 {
3395 memcpy (names, "+0x", sizeof ("+0x") - 1);
3396 names += sizeof ("+0x") - 1;
3397 bfd_sprintf_vma (abfd, names, p->addend);
3398 names += strlen (names);
3399 }
3400 memcpy (names, "@plt", sizeof ("@plt"));
3401 names += sizeof ("@plt");
3402 s++;
3403 glink_vma += 8;
3404 if (i >= 0x8000)
3405 glink_vma += 4;
3406 }
3407 count += plt_count;
3408 }
3409 }
3410
3411 done:
3412 free (syms);
3413 return count;
3414 }
3415 \f
3416 /* The following functions are specific to the ELF linker, while
3417 functions above are used generally. Those named ppc64_elf_* are
3418 called by the main ELF linker code. They appear in this file more
3419 or less in the order in which they are called. eg.
3420 ppc64_elf_check_relocs is called early in the link process,
3421 ppc64_elf_finish_dynamic_sections is one of the last functions
3422 called.
3423
3424 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3425 functions have both a function code symbol and a function descriptor
3426 symbol. A call to foo in a relocatable object file looks like:
3427
3428 . .text
3429 . x:
3430 . bl .foo
3431 . nop
3432
3433 The function definition in another object file might be:
3434
3435 . .section .opd
3436 . foo: .quad .foo
3437 . .quad .TOC.@tocbase
3438 . .quad 0
3439 .
3440 . .text
3441 . .foo: blr
3442
3443 When the linker resolves the call during a static link, the branch
3444 unsurprisingly just goes to .foo and the .opd information is unused.
3445 If the function definition is in a shared library, things are a little
3446 different: The call goes via a plt call stub, the opd information gets
3447 copied to the plt, and the linker patches the nop.
3448
3449 . x:
3450 . bl .foo_stub
3451 . ld 2,40(1)
3452 .
3453 .
3454 . .foo_stub:
3455 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3456 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3457 . std 2,40(1) # this is the general idea
3458 . ld 11,0(12)
3459 . ld 2,8(12)
3460 . mtctr 11
3461 . ld 11,16(12)
3462 . bctr
3463 .
3464 . .section .plt
3465 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3466
3467 The "reloc ()" notation is supposed to indicate that the linker emits
3468 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3469 copying.
3470
3471 What are the difficulties here? Well, firstly, the relocations
3472 examined by the linker in check_relocs are against the function code
3473 sym .foo, while the dynamic relocation in the plt is emitted against
3474 the function descriptor symbol, foo. Somewhere along the line, we need
3475 to carefully copy dynamic link information from one symbol to the other.
3476 Secondly, the generic part of the elf linker will make .foo a dynamic
3477 symbol as is normal for most other backends. We need foo dynamic
3478 instead, at least for an application final link. However, when
3479 creating a shared library containing foo, we need to have both symbols
3480 dynamic so that references to .foo are satisfied during the early
3481 stages of linking. Otherwise the linker might decide to pull in a
3482 definition from some other object, eg. a static library.
3483
3484 Update: As of August 2004, we support a new convention. Function
3485 calls may use the function descriptor symbol, ie. "bl foo". This
3486 behaves exactly as "bl .foo". */
3487
3488 /* Of those relocs that might be copied as dynamic relocs, this function
3489 selects those that must be copied when linking a shared library,
3490 even when the symbol is local. */
3491
3492 static int
3493 must_be_dyn_reloc (struct bfd_link_info *info,
3494 enum elf_ppc64_reloc_type r_type)
3495 {
3496 switch (r_type)
3497 {
3498 default:
3499 return 1;
3500
3501 case R_PPC64_REL32:
3502 case R_PPC64_REL64:
3503 case R_PPC64_REL30:
3504 return 0;
3505
3506 case R_PPC64_TPREL16:
3507 case R_PPC64_TPREL16_LO:
3508 case R_PPC64_TPREL16_HI:
3509 case R_PPC64_TPREL16_HA:
3510 case R_PPC64_TPREL16_DS:
3511 case R_PPC64_TPREL16_LO_DS:
3512 case R_PPC64_TPREL16_HIGHER:
3513 case R_PPC64_TPREL16_HIGHERA:
3514 case R_PPC64_TPREL16_HIGHEST:
3515 case R_PPC64_TPREL16_HIGHESTA:
3516 case R_PPC64_TPREL64:
3517 return !info->executable;
3518 }
3519 }
3520
3521 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3522 copying dynamic variables from a shared lib into an app's dynbss
3523 section, and instead use a dynamic relocation to point into the
3524 shared lib. With code that gcc generates, it's vital that this be
3525 enabled; In the PowerPC64 ABI, the address of a function is actually
3526 the address of a function descriptor, which resides in the .opd
3527 section. gcc uses the descriptor directly rather than going via the
3528 GOT as some other ABI's do, which means that initialized function
3529 pointers must reference the descriptor. Thus, a function pointer
3530 initialized to the address of a function in a shared library will
3531 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3532 redefines the function descriptor symbol to point to the copy. This
3533 presents a problem as a plt entry for that function is also
3534 initialized from the function descriptor symbol and the copy reloc
3535 may not be initialized first. */
3536 #define ELIMINATE_COPY_RELOCS 1
3537
3538 /* Section name for stubs is the associated section name plus this
3539 string. */
3540 #define STUB_SUFFIX ".stub"
3541
3542 /* Linker stubs.
3543 ppc_stub_long_branch:
3544 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3545 destination, but a 24 bit branch in a stub section will reach.
3546 . b dest
3547
3548 ppc_stub_plt_branch:
3549 Similar to the above, but a 24 bit branch in the stub section won't
3550 reach its destination.
3551 . addis %r12,%r2,xxx@toc@ha
3552 . ld %r11,xxx@toc@l(%r12)
3553 . mtctr %r11
3554 . bctr
3555
3556 ppc_stub_plt_call:
3557 Used to call a function in a shared library. If it so happens that
3558 the plt entry referenced crosses a 64k boundary, then an extra
3559 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3560 . addis %r12,%r2,xxx@toc@ha
3561 . std %r2,40(%r1)
3562 . ld %r11,xxx+0@toc@l(%r12)
3563 . mtctr %r11
3564 . ld %r2,xxx+8@toc@l(%r12)
3565 . ld %r11,xxx+16@toc@l(%r12)
3566 . bctr
3567
3568 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3569 code to adjust the value and save r2 to support multiple toc sections.
3570 A ppc_stub_long_branch with an r2 offset looks like:
3571 . std %r2,40(%r1)
3572 . addis %r2,%r2,off@ha
3573 . addi %r2,%r2,off@l
3574 . b dest
3575
3576 A ppc_stub_plt_branch with an r2 offset looks like:
3577 . std %r2,40(%r1)
3578 . addis %r12,%r2,xxx@toc@ha
3579 . ld %r11,xxx@toc@l(%r12)
3580 . addis %r2,%r2,off@ha
3581 . addi %r2,%r2,off@l
3582 . mtctr %r11
3583 . bctr
3584
3585 In cases where the "addis" instruction would add zero, the "addis" is
3586 omitted and following instructions modified slightly in some cases.
3587 */
3588
3589 enum ppc_stub_type {
3590 ppc_stub_none,
3591 ppc_stub_long_branch,
3592 ppc_stub_long_branch_r2off,
3593 ppc_stub_plt_branch,
3594 ppc_stub_plt_branch_r2off,
3595 ppc_stub_plt_call,
3596 ppc_stub_plt_call_r2save
3597 };
3598
3599 struct ppc_stub_hash_entry {
3600
3601 /* Base hash table entry structure. */
3602 struct bfd_hash_entry root;
3603
3604 enum ppc_stub_type stub_type;
3605
3606 /* The stub section. */
3607 asection *stub_sec;
3608
3609 /* Offset within stub_sec of the beginning of this stub. */
3610 bfd_vma stub_offset;
3611
3612 /* Given the symbol's value and its section we can determine its final
3613 value when building the stubs (so the stub knows where to jump. */
3614 bfd_vma target_value;
3615 asection *target_section;
3616
3617 /* The symbol table entry, if any, that this was derived from. */
3618 struct ppc_link_hash_entry *h;
3619 struct plt_entry *plt_ent;
3620
3621 /* And the reloc addend that this was derived from. */
3622 bfd_vma addend;
3623
3624 /* Where this stub is being called from, or, in the case of combined
3625 stub sections, the first input section in the group. */
3626 asection *id_sec;
3627 };
3628
3629 struct ppc_branch_hash_entry {
3630
3631 /* Base hash table entry structure. */
3632 struct bfd_hash_entry root;
3633
3634 /* Offset within branch lookup table. */
3635 unsigned int offset;
3636
3637 /* Generation marker. */
3638 unsigned int iter;
3639 };
3640
3641 /* Used to track dynamic relocations for local symbols. */
3642 struct ppc_dyn_relocs
3643 {
3644 struct ppc_dyn_relocs *next;
3645
3646 /* The input section of the reloc. */
3647 asection *sec;
3648
3649 /* Total number of relocs copied for the input section. */
3650 unsigned int count : 31;
3651
3652 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3653 unsigned int ifunc : 1;
3654 };
3655
3656 struct ppc_link_hash_entry
3657 {
3658 struct elf_link_hash_entry elf;
3659
3660 union {
3661 /* A pointer to the most recently used stub hash entry against this
3662 symbol. */
3663 struct ppc_stub_hash_entry *stub_cache;
3664
3665 /* A pointer to the next symbol starting with a '.' */
3666 struct ppc_link_hash_entry *next_dot_sym;
3667 } u;
3668
3669 /* Track dynamic relocs copied for this symbol. */
3670 struct elf_dyn_relocs *dyn_relocs;
3671
3672 /* Link between function code and descriptor symbols. */
3673 struct ppc_link_hash_entry *oh;
3674
3675 /* Flag function code and descriptor symbols. */
3676 unsigned int is_func:1;
3677 unsigned int is_func_descriptor:1;
3678 unsigned int fake:1;
3679
3680 /* Whether global opd/toc sym has been adjusted or not.
3681 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3682 should be set for all globals defined in any opd/toc section. */
3683 unsigned int adjust_done:1;
3684
3685 /* Set if we twiddled this symbol to weak at some stage. */
3686 unsigned int was_undefined:1;
3687
3688 /* Contexts in which symbol is used in the GOT (or TOC).
3689 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3690 corresponding relocs are encountered during check_relocs.
3691 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3692 indicate the corresponding GOT entry type is not needed.
3693 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3694 a TPREL one. We use a separate flag rather than setting TPREL
3695 just for convenience in distinguishing the two cases. */
3696 #define TLS_GD 1 /* GD reloc. */
3697 #define TLS_LD 2 /* LD reloc. */
3698 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3699 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3700 #define TLS_TLS 16 /* Any TLS reloc. */
3701 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3702 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3703 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3704 unsigned char tls_mask;
3705 };
3706
3707 /* ppc64 ELF linker hash table. */
3708
3709 struct ppc_link_hash_table
3710 {
3711 struct elf_link_hash_table elf;
3712
3713 /* The stub hash table. */
3714 struct bfd_hash_table stub_hash_table;
3715
3716 /* Another hash table for plt_branch stubs. */
3717 struct bfd_hash_table branch_hash_table;
3718
3719 /* Hash table for function prologue tocsave. */
3720 htab_t tocsave_htab;
3721
3722 /* Linker stub bfd. */
3723 bfd *stub_bfd;
3724
3725 /* Linker call-backs. */
3726 asection * (*add_stub_section) (const char *, asection *);
3727 void (*layout_sections_again) (void);
3728
3729 /* Array to keep track of which stub sections have been created, and
3730 information on stub grouping. */
3731 struct map_stub {
3732 /* This is the section to which stubs in the group will be attached. */
3733 asection *link_sec;
3734 /* The stub section. */
3735 asection *stub_sec;
3736 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3737 bfd_vma toc_off;
3738 } *stub_group;
3739
3740 /* Temp used when calculating TOC pointers. */
3741 bfd_vma toc_curr;
3742 bfd *toc_bfd;
3743 asection *toc_first_sec;
3744
3745 /* Highest input section id. */
3746 int top_id;
3747
3748 /* Highest output section index. */
3749 int top_index;
3750
3751 /* Used when adding symbols. */
3752 struct ppc_link_hash_entry *dot_syms;
3753
3754 /* List of input sections for each output section. */
3755 asection **input_list;
3756
3757 /* Short-cuts to get to dynamic linker sections. */
3758 asection *got;
3759 asection *plt;
3760 asection *relplt;
3761 asection *iplt;
3762 asection *reliplt;
3763 asection *dynbss;
3764 asection *relbss;
3765 asection *glink;
3766 asection *sfpr;
3767 asection *brlt;
3768 asection *relbrlt;
3769 asection *glink_eh_frame;
3770
3771 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3772 struct ppc_link_hash_entry *tls_get_addr;
3773 struct ppc_link_hash_entry *tls_get_addr_fd;
3774
3775 /* The size of reliplt used by got entry relocs. */
3776 bfd_size_type got_reli_size;
3777
3778 /* Statistics. */
3779 unsigned long stub_count[ppc_stub_plt_call_r2save];
3780
3781 /* Number of stubs against global syms. */
3782 unsigned long stub_globals;
3783
3784 /* Alignment of PLT call stubs. */
3785 unsigned int plt_stub_align:4;
3786
3787 /* Set if PLT call stubs should load r11. */
3788 unsigned int plt_static_chain:1;
3789
3790 /* Set if PLT call stubs need a read-read barrier. */
3791 unsigned int plt_thread_safe:1;
3792
3793 /* Set if we should emit symbols for stubs. */
3794 unsigned int emit_stub_syms:1;
3795
3796 /* Set if __tls_get_addr optimization should not be done. */
3797 unsigned int no_tls_get_addr_opt:1;
3798
3799 /* Support for multiple toc sections. */
3800 unsigned int do_multi_toc:1;
3801 unsigned int multi_toc_needed:1;
3802 unsigned int second_toc_pass:1;
3803 unsigned int do_toc_opt:1;
3804
3805 /* Set on error. */
3806 unsigned int stub_error:1;
3807
3808 /* Temp used by ppc64_elf_process_dot_syms. */
3809 unsigned int twiddled_syms:1;
3810
3811 /* Incremented every time we size stubs. */
3812 unsigned int stub_iteration;
3813
3814 /* Small local sym cache. */
3815 struct sym_cache sym_cache;
3816 };
3817
3818 /* Rename some of the generic section flags to better document how they
3819 are used here. */
3820
3821 /* Nonzero if this section has TLS related relocations. */
3822 #define has_tls_reloc sec_flg0
3823
3824 /* Nonzero if this section has a call to __tls_get_addr. */
3825 #define has_tls_get_addr_call sec_flg1
3826
3827 /* Nonzero if this section has any toc or got relocs. */
3828 #define has_toc_reloc sec_flg2
3829
3830 /* Nonzero if this section has a call to another section that uses
3831 the toc or got. */
3832 #define makes_toc_func_call sec_flg3
3833
3834 /* Recursion protection when determining above flag. */
3835 #define call_check_in_progress sec_flg4
3836 #define call_check_done sec_flg5
3837
3838 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3839
3840 #define ppc_hash_table(p) \
3841 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3842 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3843
3844 #define ppc_stub_hash_lookup(table, string, create, copy) \
3845 ((struct ppc_stub_hash_entry *) \
3846 bfd_hash_lookup ((table), (string), (create), (copy)))
3847
3848 #define ppc_branch_hash_lookup(table, string, create, copy) \
3849 ((struct ppc_branch_hash_entry *) \
3850 bfd_hash_lookup ((table), (string), (create), (copy)))
3851
3852 /* Create an entry in the stub hash table. */
3853
3854 static struct bfd_hash_entry *
3855 stub_hash_newfunc (struct bfd_hash_entry *entry,
3856 struct bfd_hash_table *table,
3857 const char *string)
3858 {
3859 /* Allocate the structure if it has not already been allocated by a
3860 subclass. */
3861 if (entry == NULL)
3862 {
3863 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3864 if (entry == NULL)
3865 return entry;
3866 }
3867
3868 /* Call the allocation method of the superclass. */
3869 entry = bfd_hash_newfunc (entry, table, string);
3870 if (entry != NULL)
3871 {
3872 struct ppc_stub_hash_entry *eh;
3873
3874 /* Initialize the local fields. */
3875 eh = (struct ppc_stub_hash_entry *) entry;
3876 eh->stub_type = ppc_stub_none;
3877 eh->stub_sec = NULL;
3878 eh->stub_offset = 0;
3879 eh->target_value = 0;
3880 eh->target_section = NULL;
3881 eh->h = NULL;
3882 eh->id_sec = NULL;
3883 }
3884
3885 return entry;
3886 }
3887
3888 /* Create an entry in the branch hash table. */
3889
3890 static struct bfd_hash_entry *
3891 branch_hash_newfunc (struct bfd_hash_entry *entry,
3892 struct bfd_hash_table *table,
3893 const char *string)
3894 {
3895 /* Allocate the structure if it has not already been allocated by a
3896 subclass. */
3897 if (entry == NULL)
3898 {
3899 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3900 if (entry == NULL)
3901 return entry;
3902 }
3903
3904 /* Call the allocation method of the superclass. */
3905 entry = bfd_hash_newfunc (entry, table, string);
3906 if (entry != NULL)
3907 {
3908 struct ppc_branch_hash_entry *eh;
3909
3910 /* Initialize the local fields. */
3911 eh = (struct ppc_branch_hash_entry *) entry;
3912 eh->offset = 0;
3913 eh->iter = 0;
3914 }
3915
3916 return entry;
3917 }
3918
3919 /* Create an entry in a ppc64 ELF linker hash table. */
3920
3921 static struct bfd_hash_entry *
3922 link_hash_newfunc (struct bfd_hash_entry *entry,
3923 struct bfd_hash_table *table,
3924 const char *string)
3925 {
3926 /* Allocate the structure if it has not already been allocated by a
3927 subclass. */
3928 if (entry == NULL)
3929 {
3930 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3931 if (entry == NULL)
3932 return entry;
3933 }
3934
3935 /* Call the allocation method of the superclass. */
3936 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3937 if (entry != NULL)
3938 {
3939 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3940
3941 memset (&eh->u.stub_cache, 0,
3942 (sizeof (struct ppc_link_hash_entry)
3943 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3944
3945 /* When making function calls, old ABI code references function entry
3946 points (dot symbols), while new ABI code references the function
3947 descriptor symbol. We need to make any combination of reference and
3948 definition work together, without breaking archive linking.
3949
3950 For a defined function "foo" and an undefined call to "bar":
3951 An old object defines "foo" and ".foo", references ".bar" (possibly
3952 "bar" too).
3953 A new object defines "foo" and references "bar".
3954
3955 A new object thus has no problem with its undefined symbols being
3956 satisfied by definitions in an old object. On the other hand, the
3957 old object won't have ".bar" satisfied by a new object.
3958
3959 Keep a list of newly added dot-symbols. */
3960
3961 if (string[0] == '.')
3962 {
3963 struct ppc_link_hash_table *htab;
3964
3965 htab = (struct ppc_link_hash_table *) table;
3966 eh->u.next_dot_sym = htab->dot_syms;
3967 htab->dot_syms = eh;
3968 }
3969 }
3970
3971 return entry;
3972 }
3973
3974 struct tocsave_entry {
3975 asection *sec;
3976 bfd_vma offset;
3977 };
3978
3979 static hashval_t
3980 tocsave_htab_hash (const void *p)
3981 {
3982 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
3983 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
3984 }
3985
3986 static int
3987 tocsave_htab_eq (const void *p1, const void *p2)
3988 {
3989 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
3990 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
3991 return e1->sec == e2->sec && e1->offset == e2->offset;
3992 }
3993
3994 /* Create a ppc64 ELF linker hash table. */
3995
3996 static struct bfd_link_hash_table *
3997 ppc64_elf_link_hash_table_create (bfd *abfd)
3998 {
3999 struct ppc_link_hash_table *htab;
4000 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4001
4002 htab = bfd_zmalloc (amt);
4003 if (htab == NULL)
4004 return NULL;
4005
4006 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4007 sizeof (struct ppc_link_hash_entry),
4008 PPC64_ELF_DATA))
4009 {
4010 free (htab);
4011 return NULL;
4012 }
4013
4014 /* Init the stub hash table too. */
4015 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4016 sizeof (struct ppc_stub_hash_entry)))
4017 return NULL;
4018
4019 /* And the branch hash table. */
4020 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4021 sizeof (struct ppc_branch_hash_entry)))
4022 return NULL;
4023
4024 htab->tocsave_htab = htab_try_create (1024,
4025 tocsave_htab_hash,
4026 tocsave_htab_eq,
4027 NULL);
4028 if (htab->tocsave_htab == NULL)
4029 return NULL;
4030
4031 /* Initializing two fields of the union is just cosmetic. We really
4032 only care about glist, but when compiled on a 32-bit host the
4033 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4034 debugger inspection of these fields look nicer. */
4035 htab->elf.init_got_refcount.refcount = 0;
4036 htab->elf.init_got_refcount.glist = NULL;
4037 htab->elf.init_plt_refcount.refcount = 0;
4038 htab->elf.init_plt_refcount.glist = NULL;
4039 htab->elf.init_got_offset.offset = 0;
4040 htab->elf.init_got_offset.glist = NULL;
4041 htab->elf.init_plt_offset.offset = 0;
4042 htab->elf.init_plt_offset.glist = NULL;
4043
4044 return &htab->elf.root;
4045 }
4046
4047 /* Free the derived linker hash table. */
4048
4049 static void
4050 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4051 {
4052 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4053
4054 bfd_hash_table_free (&htab->stub_hash_table);
4055 bfd_hash_table_free (&htab->branch_hash_table);
4056 if (htab->tocsave_htab)
4057 htab_delete (htab->tocsave_htab);
4058 _bfd_elf_link_hash_table_free (hash);
4059 }
4060
4061 /* Create sections for linker generated code. */
4062
4063 static bfd_boolean
4064 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4065 {
4066 struct ppc_link_hash_table *htab;
4067 flagword flags;
4068
4069 htab = ppc_hash_table (info);
4070
4071 /* Create .sfpr for code to save and restore fp regs. */
4072 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4073 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4074 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4075 flags);
4076 if (htab->sfpr == NULL
4077 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4078 return FALSE;
4079
4080 /* Create .glink for lazy dynamic linking support. */
4081 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4082 flags);
4083 if (htab->glink == NULL
4084 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4085 return FALSE;
4086
4087 if (!info->no_ld_generated_unwind_info)
4088 {
4089 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4090 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4091 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4092 ".eh_frame",
4093 flags);
4094 if (htab->glink_eh_frame == NULL
4095 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4096 return FALSE;
4097 }
4098
4099 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4100 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4101 if (htab->iplt == NULL
4102 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4103 return FALSE;
4104
4105 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4106 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4107 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4108 ".rela.iplt",
4109 flags);
4110 if (htab->reliplt == NULL
4111 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4112 return FALSE;
4113
4114 /* Create branch lookup table for plt_branch stubs. */
4115 flags = (SEC_ALLOC | SEC_LOAD
4116 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4117 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4118 flags);
4119 if (htab->brlt == NULL
4120 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4121 return FALSE;
4122
4123 if (!info->shared)
4124 return TRUE;
4125
4126 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4127 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4128 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4129 ".rela.branch_lt",
4130 flags);
4131 if (htab->relbrlt == NULL
4132 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4133 return FALSE;
4134
4135 return TRUE;
4136 }
4137
4138 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4139
4140 bfd_boolean
4141 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4142 {
4143 struct ppc_link_hash_table *htab;
4144
4145 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4146
4147 /* Always hook our dynamic sections into the first bfd, which is the
4148 linker created stub bfd. This ensures that the GOT header is at
4149 the start of the output TOC section. */
4150 htab = ppc_hash_table (info);
4151 if (htab == NULL)
4152 return FALSE;
4153 htab->stub_bfd = abfd;
4154 htab->elf.dynobj = abfd;
4155
4156 if (info->relocatable)
4157 return TRUE;
4158
4159 return create_linkage_sections (htab->elf.dynobj, info);
4160 }
4161
4162 /* Build a name for an entry in the stub hash table. */
4163
4164 static char *
4165 ppc_stub_name (const asection *input_section,
4166 const asection *sym_sec,
4167 const struct ppc_link_hash_entry *h,
4168 const Elf_Internal_Rela *rel)
4169 {
4170 char *stub_name;
4171 ssize_t len;
4172
4173 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4174 offsets from a sym as a branch target? In fact, we could
4175 probably assume the addend is always zero. */
4176 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4177
4178 if (h)
4179 {
4180 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4181 stub_name = bfd_malloc (len);
4182 if (stub_name == NULL)
4183 return stub_name;
4184
4185 len = sprintf (stub_name, "%08x.%s+%x",
4186 input_section->id & 0xffffffff,
4187 h->elf.root.root.string,
4188 (int) rel->r_addend & 0xffffffff);
4189 }
4190 else
4191 {
4192 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4193 stub_name = bfd_malloc (len);
4194 if (stub_name == NULL)
4195 return stub_name;
4196
4197 len = sprintf (stub_name, "%08x.%x:%x+%x",
4198 input_section->id & 0xffffffff,
4199 sym_sec->id & 0xffffffff,
4200 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4201 (int) rel->r_addend & 0xffffffff);
4202 }
4203 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4204 stub_name[len - 2] = 0;
4205 return stub_name;
4206 }
4207
4208 /* Look up an entry in the stub hash. Stub entries are cached because
4209 creating the stub name takes a bit of time. */
4210
4211 static struct ppc_stub_hash_entry *
4212 ppc_get_stub_entry (const asection *input_section,
4213 const asection *sym_sec,
4214 struct ppc_link_hash_entry *h,
4215 const Elf_Internal_Rela *rel,
4216 struct ppc_link_hash_table *htab)
4217 {
4218 struct ppc_stub_hash_entry *stub_entry;
4219 const asection *id_sec;
4220
4221 /* If this input section is part of a group of sections sharing one
4222 stub section, then use the id of the first section in the group.
4223 Stub names need to include a section id, as there may well be
4224 more than one stub used to reach say, printf, and we need to
4225 distinguish between them. */
4226 id_sec = htab->stub_group[input_section->id].link_sec;
4227
4228 if (h != NULL && h->u.stub_cache != NULL
4229 && h->u.stub_cache->h == h
4230 && h->u.stub_cache->id_sec == id_sec)
4231 {
4232 stub_entry = h->u.stub_cache;
4233 }
4234 else
4235 {
4236 char *stub_name;
4237
4238 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4239 if (stub_name == NULL)
4240 return NULL;
4241
4242 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4243 stub_name, FALSE, FALSE);
4244 if (h != NULL)
4245 h->u.stub_cache = stub_entry;
4246
4247 free (stub_name);
4248 }
4249
4250 return stub_entry;
4251 }
4252
4253 /* Add a new stub entry to the stub hash. Not all fields of the new
4254 stub entry are initialised. */
4255
4256 static struct ppc_stub_hash_entry *
4257 ppc_add_stub (const char *stub_name,
4258 asection *section,
4259 struct bfd_link_info *info)
4260 {
4261 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4262 asection *link_sec;
4263 asection *stub_sec;
4264 struct ppc_stub_hash_entry *stub_entry;
4265
4266 link_sec = htab->stub_group[section->id].link_sec;
4267 stub_sec = htab->stub_group[section->id].stub_sec;
4268 if (stub_sec == NULL)
4269 {
4270 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4271 if (stub_sec == NULL)
4272 {
4273 size_t namelen;
4274 bfd_size_type len;
4275 char *s_name;
4276
4277 namelen = strlen (link_sec->name);
4278 len = namelen + sizeof (STUB_SUFFIX);
4279 s_name = bfd_alloc (htab->stub_bfd, len);
4280 if (s_name == NULL)
4281 return NULL;
4282
4283 memcpy (s_name, link_sec->name, namelen);
4284 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4285 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4286 if (stub_sec == NULL)
4287 return NULL;
4288 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4289 }
4290 htab->stub_group[section->id].stub_sec = stub_sec;
4291 }
4292
4293 /* Enter this entry into the linker stub hash table. */
4294 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4295 TRUE, FALSE);
4296 if (stub_entry == NULL)
4297 {
4298 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4299 section->owner, stub_name);
4300 return NULL;
4301 }
4302
4303 stub_entry->stub_sec = stub_sec;
4304 stub_entry->stub_offset = 0;
4305 stub_entry->id_sec = link_sec;
4306 return stub_entry;
4307 }
4308
4309 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4310 not already done. */
4311
4312 static bfd_boolean
4313 create_got_section (bfd *abfd, struct bfd_link_info *info)
4314 {
4315 asection *got, *relgot;
4316 flagword flags;
4317 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4318
4319 if (!is_ppc64_elf (abfd))
4320 return FALSE;
4321 if (htab == NULL)
4322 return FALSE;
4323
4324 if (!htab->got)
4325 {
4326 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4327 return FALSE;
4328
4329 htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got");
4330 if (!htab->got)
4331 abort ();
4332 }
4333
4334 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4335 | SEC_LINKER_CREATED);
4336
4337 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4338 if (!got
4339 || !bfd_set_section_alignment (abfd, got, 3))
4340 return FALSE;
4341
4342 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4343 flags | SEC_READONLY);
4344 if (!relgot
4345 || ! bfd_set_section_alignment (abfd, relgot, 3))
4346 return FALSE;
4347
4348 ppc64_elf_tdata (abfd)->got = got;
4349 ppc64_elf_tdata (abfd)->relgot = relgot;
4350 return TRUE;
4351 }
4352
4353 /* Create the dynamic sections, and set up shortcuts. */
4354
4355 static bfd_boolean
4356 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4357 {
4358 struct ppc_link_hash_table *htab;
4359
4360 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4361 return FALSE;
4362
4363 htab = ppc_hash_table (info);
4364 if (htab == NULL)
4365 return FALSE;
4366
4367 if (!htab->got)
4368 htab->got = bfd_get_linker_section (dynobj, ".got");
4369 htab->plt = bfd_get_linker_section (dynobj, ".plt");
4370 htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt");
4371 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4372 if (!info->shared)
4373 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4374
4375 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4376 || (!info->shared && !htab->relbss))
4377 abort ();
4378
4379 return TRUE;
4380 }
4381
4382 /* Follow indirect and warning symbol links. */
4383
4384 static inline struct bfd_link_hash_entry *
4385 follow_link (struct bfd_link_hash_entry *h)
4386 {
4387 while (h->type == bfd_link_hash_indirect
4388 || h->type == bfd_link_hash_warning)
4389 h = h->u.i.link;
4390 return h;
4391 }
4392
4393 static inline struct elf_link_hash_entry *
4394 elf_follow_link (struct elf_link_hash_entry *h)
4395 {
4396 return (struct elf_link_hash_entry *) follow_link (&h->root);
4397 }
4398
4399 static inline struct ppc_link_hash_entry *
4400 ppc_follow_link (struct ppc_link_hash_entry *h)
4401 {
4402 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4403 }
4404
4405 /* Merge PLT info on FROM with that on TO. */
4406
4407 static void
4408 move_plt_plist (struct ppc_link_hash_entry *from,
4409 struct ppc_link_hash_entry *to)
4410 {
4411 if (from->elf.plt.plist != NULL)
4412 {
4413 if (to->elf.plt.plist != NULL)
4414 {
4415 struct plt_entry **entp;
4416 struct plt_entry *ent;
4417
4418 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4419 {
4420 struct plt_entry *dent;
4421
4422 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4423 if (dent->addend == ent->addend)
4424 {
4425 dent->plt.refcount += ent->plt.refcount;
4426 *entp = ent->next;
4427 break;
4428 }
4429 if (dent == NULL)
4430 entp = &ent->next;
4431 }
4432 *entp = to->elf.plt.plist;
4433 }
4434
4435 to->elf.plt.plist = from->elf.plt.plist;
4436 from->elf.plt.plist = NULL;
4437 }
4438 }
4439
4440 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4441
4442 static void
4443 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4444 struct elf_link_hash_entry *dir,
4445 struct elf_link_hash_entry *ind)
4446 {
4447 struct ppc_link_hash_entry *edir, *eind;
4448
4449 edir = (struct ppc_link_hash_entry *) dir;
4450 eind = (struct ppc_link_hash_entry *) ind;
4451
4452 edir->is_func |= eind->is_func;
4453 edir->is_func_descriptor |= eind->is_func_descriptor;
4454 edir->tls_mask |= eind->tls_mask;
4455 if (eind->oh != NULL)
4456 edir->oh = ppc_follow_link (eind->oh);
4457
4458 /* If called to transfer flags for a weakdef during processing
4459 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4460 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4461 if (!(ELIMINATE_COPY_RELOCS
4462 && eind->elf.root.type != bfd_link_hash_indirect
4463 && edir->elf.dynamic_adjusted))
4464 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4465
4466 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4467 edir->elf.ref_regular |= eind->elf.ref_regular;
4468 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4469 edir->elf.needs_plt |= eind->elf.needs_plt;
4470
4471 /* Copy over any dynamic relocs we may have on the indirect sym. */
4472 if (eind->dyn_relocs != NULL)
4473 {
4474 if (edir->dyn_relocs != NULL)
4475 {
4476 struct elf_dyn_relocs **pp;
4477 struct elf_dyn_relocs *p;
4478
4479 /* Add reloc counts against the indirect sym to the direct sym
4480 list. Merge any entries against the same section. */
4481 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4482 {
4483 struct elf_dyn_relocs *q;
4484
4485 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4486 if (q->sec == p->sec)
4487 {
4488 q->pc_count += p->pc_count;
4489 q->count += p->count;
4490 *pp = p->next;
4491 break;
4492 }
4493 if (q == NULL)
4494 pp = &p->next;
4495 }
4496 *pp = edir->dyn_relocs;
4497 }
4498
4499 edir->dyn_relocs = eind->dyn_relocs;
4500 eind->dyn_relocs = NULL;
4501 }
4502
4503 /* If we were called to copy over info for a weak sym, that's all.
4504 You might think dyn_relocs need not be copied over; After all,
4505 both syms will be dynamic or both non-dynamic so we're just
4506 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4507 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4508 dyn_relocs in read-only sections, and it does so on what is the
4509 DIR sym here. */
4510 if (eind->elf.root.type != bfd_link_hash_indirect)
4511 return;
4512
4513 /* Copy over got entries that we may have already seen to the
4514 symbol which just became indirect. */
4515 if (eind->elf.got.glist != NULL)
4516 {
4517 if (edir->elf.got.glist != NULL)
4518 {
4519 struct got_entry **entp;
4520 struct got_entry *ent;
4521
4522 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4523 {
4524 struct got_entry *dent;
4525
4526 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4527 if (dent->addend == ent->addend
4528 && dent->owner == ent->owner
4529 && dent->tls_type == ent->tls_type)
4530 {
4531 dent->got.refcount += ent->got.refcount;
4532 *entp = ent->next;
4533 break;
4534 }
4535 if (dent == NULL)
4536 entp = &ent->next;
4537 }
4538 *entp = edir->elf.got.glist;
4539 }
4540
4541 edir->elf.got.glist = eind->elf.got.glist;
4542 eind->elf.got.glist = NULL;
4543 }
4544
4545 /* And plt entries. */
4546 move_plt_plist (eind, edir);
4547
4548 if (eind->elf.dynindx != -1)
4549 {
4550 if (edir->elf.dynindx != -1)
4551 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4552 edir->elf.dynstr_index);
4553 edir->elf.dynindx = eind->elf.dynindx;
4554 edir->elf.dynstr_index = eind->elf.dynstr_index;
4555 eind->elf.dynindx = -1;
4556 eind->elf.dynstr_index = 0;
4557 }
4558 }
4559
4560 /* Find the function descriptor hash entry from the given function code
4561 hash entry FH. Link the entries via their OH fields. */
4562
4563 static struct ppc_link_hash_entry *
4564 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4565 {
4566 struct ppc_link_hash_entry *fdh = fh->oh;
4567
4568 if (fdh == NULL)
4569 {
4570 const char *fd_name = fh->elf.root.root.string + 1;
4571
4572 fdh = (struct ppc_link_hash_entry *)
4573 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4574 if (fdh == NULL)
4575 return fdh;
4576
4577 fdh->is_func_descriptor = 1;
4578 fdh->oh = fh;
4579 fh->is_func = 1;
4580 fh->oh = fdh;
4581 }
4582
4583 return ppc_follow_link (fdh);
4584 }
4585
4586 /* Make a fake function descriptor sym for the code sym FH. */
4587
4588 static struct ppc_link_hash_entry *
4589 make_fdh (struct bfd_link_info *info,
4590 struct ppc_link_hash_entry *fh)
4591 {
4592 bfd *abfd;
4593 asymbol *newsym;
4594 struct bfd_link_hash_entry *bh;
4595 struct ppc_link_hash_entry *fdh;
4596
4597 abfd = fh->elf.root.u.undef.abfd;
4598 newsym = bfd_make_empty_symbol (abfd);
4599 newsym->name = fh->elf.root.root.string + 1;
4600 newsym->section = bfd_und_section_ptr;
4601 newsym->value = 0;
4602 newsym->flags = BSF_WEAK;
4603
4604 bh = NULL;
4605 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4606 newsym->flags, newsym->section,
4607 newsym->value, NULL, FALSE, FALSE,
4608 &bh))
4609 return NULL;
4610
4611 fdh = (struct ppc_link_hash_entry *) bh;
4612 fdh->elf.non_elf = 0;
4613 fdh->fake = 1;
4614 fdh->is_func_descriptor = 1;
4615 fdh->oh = fh;
4616 fh->is_func = 1;
4617 fh->oh = fdh;
4618 return fdh;
4619 }
4620
4621 /* Fix function descriptor symbols defined in .opd sections to be
4622 function type. */
4623
4624 static bfd_boolean
4625 ppc64_elf_add_symbol_hook (bfd *ibfd,
4626 struct bfd_link_info *info,
4627 Elf_Internal_Sym *isym,
4628 const char **name ATTRIBUTE_UNUSED,
4629 flagword *flags ATTRIBUTE_UNUSED,
4630 asection **sec,
4631 bfd_vma *value ATTRIBUTE_UNUSED)
4632 {
4633 if ((ibfd->flags & DYNAMIC) == 0
4634 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4635 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4636
4637 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4638 {
4639 if ((ibfd->flags & DYNAMIC) == 0)
4640 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4641 }
4642 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4643 ;
4644 else if (*sec != NULL
4645 && strcmp ((*sec)->name, ".opd") == 0)
4646 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4647
4648 return TRUE;
4649 }
4650
4651 /* This function makes an old ABI object reference to ".bar" cause the
4652 inclusion of a new ABI object archive that defines "bar".
4653 NAME is a symbol defined in an archive. Return a symbol in the hash
4654 table that might be satisfied by the archive symbols. */
4655
4656 static struct elf_link_hash_entry *
4657 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4658 struct bfd_link_info *info,
4659 const char *name)
4660 {
4661 struct elf_link_hash_entry *h;
4662 char *dot_name;
4663 size_t len;
4664
4665 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4666 if (h != NULL
4667 /* Don't return this sym if it is a fake function descriptor
4668 created by add_symbol_adjust. */
4669 && !(h->root.type == bfd_link_hash_undefweak
4670 && ((struct ppc_link_hash_entry *) h)->fake))
4671 return h;
4672
4673 if (name[0] == '.')
4674 return h;
4675
4676 len = strlen (name);
4677 dot_name = bfd_alloc (abfd, len + 2);
4678 if (dot_name == NULL)
4679 return (struct elf_link_hash_entry *) 0 - 1;
4680 dot_name[0] = '.';
4681 memcpy (dot_name + 1, name, len + 1);
4682 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4683 bfd_release (abfd, dot_name);
4684 return h;
4685 }
4686
4687 /* This function satisfies all old ABI object references to ".bar" if a
4688 new ABI object defines "bar". Well, at least, undefined dot symbols
4689 are made weak. This stops later archive searches from including an
4690 object if we already have a function descriptor definition. It also
4691 prevents the linker complaining about undefined symbols.
4692 We also check and correct mismatched symbol visibility here. The
4693 most restrictive visibility of the function descriptor and the
4694 function entry symbol is used. */
4695
4696 static bfd_boolean
4697 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4698 {
4699 struct ppc_link_hash_table *htab;
4700 struct ppc_link_hash_entry *fdh;
4701
4702 if (eh->elf.root.type == bfd_link_hash_indirect)
4703 return TRUE;
4704
4705 if (eh->elf.root.type == bfd_link_hash_warning)
4706 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4707
4708 if (eh->elf.root.root.string[0] != '.')
4709 abort ();
4710
4711 htab = ppc_hash_table (info);
4712 if (htab == NULL)
4713 return FALSE;
4714
4715 fdh = lookup_fdh (eh, htab);
4716 if (fdh == NULL)
4717 {
4718 if (!info->relocatable
4719 && (eh->elf.root.type == bfd_link_hash_undefined
4720 || eh->elf.root.type == bfd_link_hash_undefweak)
4721 && eh->elf.ref_regular)
4722 {
4723 /* Make an undefweak function descriptor sym, which is enough to
4724 pull in an --as-needed shared lib, but won't cause link
4725 errors. Archives are handled elsewhere. */
4726 fdh = make_fdh (info, eh);
4727 if (fdh == NULL)
4728 return FALSE;
4729 fdh->elf.ref_regular = 1;
4730 }
4731 }
4732 else
4733 {
4734 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4735 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4736 if (entry_vis < descr_vis)
4737 fdh->elf.other += entry_vis - descr_vis;
4738 else if (entry_vis > descr_vis)
4739 eh->elf.other += descr_vis - entry_vis;
4740
4741 if ((fdh->elf.root.type == bfd_link_hash_defined
4742 || fdh->elf.root.type == bfd_link_hash_defweak)
4743 && eh->elf.root.type == bfd_link_hash_undefined)
4744 {
4745 eh->elf.root.type = bfd_link_hash_undefweak;
4746 eh->was_undefined = 1;
4747 htab->twiddled_syms = 1;
4748 }
4749 }
4750
4751 return TRUE;
4752 }
4753
4754 /* Process list of dot-symbols we made in link_hash_newfunc. */
4755
4756 static bfd_boolean
4757 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4758 {
4759 struct ppc_link_hash_table *htab;
4760 struct ppc_link_hash_entry **p, *eh;
4761
4762 if (!is_ppc64_elf (info->output_bfd))
4763 return TRUE;
4764 htab = ppc_hash_table (info);
4765 if (htab == NULL)
4766 return FALSE;
4767
4768 if (is_ppc64_elf (ibfd))
4769 {
4770 p = &htab->dot_syms;
4771 while ((eh = *p) != NULL)
4772 {
4773 *p = NULL;
4774 if (&eh->elf == htab->elf.hgot)
4775 ;
4776 else if (htab->elf.hgot == NULL
4777 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4778 htab->elf.hgot = &eh->elf;
4779 else if (!add_symbol_adjust (eh, info))
4780 return FALSE;
4781 p = &eh->u.next_dot_sym;
4782 }
4783 }
4784
4785 /* Clear the list for non-ppc64 input files. */
4786 p = &htab->dot_syms;
4787 while ((eh = *p) != NULL)
4788 {
4789 *p = NULL;
4790 p = &eh->u.next_dot_sym;
4791 }
4792
4793 /* We need to fix the undefs list for any syms we have twiddled to
4794 undef_weak. */
4795 if (htab->twiddled_syms)
4796 {
4797 bfd_link_repair_undef_list (&htab->elf.root);
4798 htab->twiddled_syms = 0;
4799 }
4800 return TRUE;
4801 }
4802
4803 /* Undo hash table changes when an --as-needed input file is determined
4804 not to be needed. */
4805
4806 static bfd_boolean
4807 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4808 struct bfd_link_info *info)
4809 {
4810 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4811
4812 if (htab == NULL)
4813 return FALSE;
4814
4815 htab->dot_syms = NULL;
4816 return TRUE;
4817 }
4818
4819 /* If --just-symbols against a final linked binary, then assume we need
4820 toc adjusting stubs when calling functions defined there. */
4821
4822 static void
4823 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4824 {
4825 if ((sec->flags & SEC_CODE) != 0
4826 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4827 && is_ppc64_elf (sec->owner))
4828 {
4829 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4830 if (got != NULL
4831 && got->size >= elf_backend_got_header_size
4832 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4833 sec->has_toc_reloc = 1;
4834 }
4835 _bfd_elf_link_just_syms (sec, info);
4836 }
4837
4838 static struct plt_entry **
4839 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4840 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4841 {
4842 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4843 struct plt_entry **local_plt;
4844 unsigned char *local_got_tls_masks;
4845
4846 if (local_got_ents == NULL)
4847 {
4848 bfd_size_type size = symtab_hdr->sh_info;
4849
4850 size *= (sizeof (*local_got_ents)
4851 + sizeof (*local_plt)
4852 + sizeof (*local_got_tls_masks));
4853 local_got_ents = bfd_zalloc (abfd, size);
4854 if (local_got_ents == NULL)
4855 return NULL;
4856 elf_local_got_ents (abfd) = local_got_ents;
4857 }
4858
4859 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4860 {
4861 struct got_entry *ent;
4862
4863 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4864 if (ent->addend == r_addend
4865 && ent->owner == abfd
4866 && ent->tls_type == tls_type)
4867 break;
4868 if (ent == NULL)
4869 {
4870 bfd_size_type amt = sizeof (*ent);
4871 ent = bfd_alloc (abfd, amt);
4872 if (ent == NULL)
4873 return FALSE;
4874 ent->next = local_got_ents[r_symndx];
4875 ent->addend = r_addend;
4876 ent->owner = abfd;
4877 ent->tls_type = tls_type;
4878 ent->is_indirect = FALSE;
4879 ent->got.refcount = 0;
4880 local_got_ents[r_symndx] = ent;
4881 }
4882 ent->got.refcount += 1;
4883 }
4884
4885 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4886 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4887 local_got_tls_masks[r_symndx] |= tls_type;
4888
4889 return local_plt + r_symndx;
4890 }
4891
4892 static bfd_boolean
4893 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4894 {
4895 struct plt_entry *ent;
4896
4897 for (ent = *plist; ent != NULL; ent = ent->next)
4898 if (ent->addend == addend)
4899 break;
4900 if (ent == NULL)
4901 {
4902 bfd_size_type amt = sizeof (*ent);
4903 ent = bfd_alloc (abfd, amt);
4904 if (ent == NULL)
4905 return FALSE;
4906 ent->next = *plist;
4907 ent->addend = addend;
4908 ent->plt.refcount = 0;
4909 *plist = ent;
4910 }
4911 ent->plt.refcount += 1;
4912 return TRUE;
4913 }
4914
4915 static bfd_boolean
4916 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4917 {
4918 return (r_type == R_PPC64_REL24
4919 || r_type == R_PPC64_REL14
4920 || r_type == R_PPC64_REL14_BRTAKEN
4921 || r_type == R_PPC64_REL14_BRNTAKEN
4922 || r_type == R_PPC64_ADDR24
4923 || r_type == R_PPC64_ADDR14
4924 || r_type == R_PPC64_ADDR14_BRTAKEN
4925 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4926 }
4927
4928 /* Look through the relocs for a section during the first phase, and
4929 calculate needed space in the global offset table, procedure
4930 linkage table, and dynamic reloc sections. */
4931
4932 static bfd_boolean
4933 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4934 asection *sec, const Elf_Internal_Rela *relocs)
4935 {
4936 struct ppc_link_hash_table *htab;
4937 Elf_Internal_Shdr *symtab_hdr;
4938 struct elf_link_hash_entry **sym_hashes;
4939 const Elf_Internal_Rela *rel;
4940 const Elf_Internal_Rela *rel_end;
4941 asection *sreloc;
4942 asection **opd_sym_map;
4943 struct elf_link_hash_entry *tga, *dottga;
4944
4945 if (info->relocatable)
4946 return TRUE;
4947
4948 /* Don't do anything special with non-loaded, non-alloced sections.
4949 In particular, any relocs in such sections should not affect GOT
4950 and PLT reference counting (ie. we don't allow them to create GOT
4951 or PLT entries), there's no possibility or desire to optimize TLS
4952 relocs, and there's not much point in propagating relocs to shared
4953 libs that the dynamic linker won't relocate. */
4954 if ((sec->flags & SEC_ALLOC) == 0)
4955 return TRUE;
4956
4957 BFD_ASSERT (is_ppc64_elf (abfd));
4958
4959 htab = ppc_hash_table (info);
4960 if (htab == NULL)
4961 return FALSE;
4962
4963 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4964 FALSE, FALSE, TRUE);
4965 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4966 FALSE, FALSE, TRUE);
4967 symtab_hdr = &elf_symtab_hdr (abfd);
4968 sym_hashes = elf_sym_hashes (abfd);
4969 sreloc = NULL;
4970 opd_sym_map = NULL;
4971 if (strcmp (sec->name, ".opd") == 0)
4972 {
4973 /* Garbage collection needs some extra help with .opd sections.
4974 We don't want to necessarily keep everything referenced by
4975 relocs in .opd, as that would keep all functions. Instead,
4976 if we reference an .opd symbol (a function descriptor), we
4977 want to keep the function code symbol's section. This is
4978 easy for global symbols, but for local syms we need to keep
4979 information about the associated function section. */
4980 bfd_size_type amt;
4981
4982 amt = sec->size * sizeof (*opd_sym_map) / 8;
4983 opd_sym_map = bfd_zalloc (abfd, amt);
4984 if (opd_sym_map == NULL)
4985 return FALSE;
4986 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4987 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4988 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4989 }
4990
4991 rel_end = relocs + sec->reloc_count;
4992 for (rel = relocs; rel < rel_end; rel++)
4993 {
4994 unsigned long r_symndx;
4995 struct elf_link_hash_entry *h;
4996 enum elf_ppc64_reloc_type r_type;
4997 int tls_type;
4998 struct _ppc64_elf_section_data *ppc64_sec;
4999 struct plt_entry **ifunc;
5000
5001 r_symndx = ELF64_R_SYM (rel->r_info);
5002 if (r_symndx < symtab_hdr->sh_info)
5003 h = NULL;
5004 else
5005 {
5006 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5007 h = elf_follow_link (h);
5008
5009 /* PR15323, ref flags aren't set for references in the same
5010 object. */
5011 h->root.non_ir_ref = 1;
5012
5013 if (h == htab->elf.hgot)
5014 sec->has_toc_reloc = 1;
5015 }
5016
5017 tls_type = 0;
5018 ifunc = NULL;
5019 if (h != NULL)
5020 {
5021 if (h->type == STT_GNU_IFUNC)
5022 {
5023 h->needs_plt = 1;
5024 ifunc = &h->plt.plist;
5025 }
5026 }
5027 else
5028 {
5029 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5030 abfd, r_symndx);
5031 if (isym == NULL)
5032 return FALSE;
5033
5034 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5035 {
5036 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5037 rel->r_addend, PLT_IFUNC);
5038 if (ifunc == NULL)
5039 return FALSE;
5040 }
5041 }
5042 r_type = ELF64_R_TYPE (rel->r_info);
5043 if (is_branch_reloc (r_type))
5044 {
5045 if (h != NULL && (h == tga || h == dottga))
5046 {
5047 if (rel != relocs
5048 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5049 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5050 /* We have a new-style __tls_get_addr call with a marker
5051 reloc. */
5052 ;
5053 else
5054 /* Mark this section as having an old-style call. */
5055 sec->has_tls_get_addr_call = 1;
5056 }
5057
5058 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5059 if (ifunc != NULL
5060 && !update_plt_info (abfd, ifunc, rel->r_addend))
5061 return FALSE;
5062 }
5063
5064 switch (r_type)
5065 {
5066 case R_PPC64_TLSGD:
5067 case R_PPC64_TLSLD:
5068 /* These special tls relocs tie a call to __tls_get_addr with
5069 its parameter symbol. */
5070 break;
5071
5072 case R_PPC64_GOT_TLSLD16:
5073 case R_PPC64_GOT_TLSLD16_LO:
5074 case R_PPC64_GOT_TLSLD16_HI:
5075 case R_PPC64_GOT_TLSLD16_HA:
5076 tls_type = TLS_TLS | TLS_LD;
5077 goto dogottls;
5078
5079 case R_PPC64_GOT_TLSGD16:
5080 case R_PPC64_GOT_TLSGD16_LO:
5081 case R_PPC64_GOT_TLSGD16_HI:
5082 case R_PPC64_GOT_TLSGD16_HA:
5083 tls_type = TLS_TLS | TLS_GD;
5084 goto dogottls;
5085
5086 case R_PPC64_GOT_TPREL16_DS:
5087 case R_PPC64_GOT_TPREL16_LO_DS:
5088 case R_PPC64_GOT_TPREL16_HI:
5089 case R_PPC64_GOT_TPREL16_HA:
5090 if (!info->executable)
5091 info->flags |= DF_STATIC_TLS;
5092 tls_type = TLS_TLS | TLS_TPREL;
5093 goto dogottls;
5094
5095 case R_PPC64_GOT_DTPREL16_DS:
5096 case R_PPC64_GOT_DTPREL16_LO_DS:
5097 case R_PPC64_GOT_DTPREL16_HI:
5098 case R_PPC64_GOT_DTPREL16_HA:
5099 tls_type = TLS_TLS | TLS_DTPREL;
5100 dogottls:
5101 sec->has_tls_reloc = 1;
5102 /* Fall thru */
5103
5104 case R_PPC64_GOT16:
5105 case R_PPC64_GOT16_DS:
5106 case R_PPC64_GOT16_HA:
5107 case R_PPC64_GOT16_HI:
5108 case R_PPC64_GOT16_LO:
5109 case R_PPC64_GOT16_LO_DS:
5110 /* This symbol requires a global offset table entry. */
5111 sec->has_toc_reloc = 1;
5112 if (r_type == R_PPC64_GOT_TLSLD16
5113 || r_type == R_PPC64_GOT_TLSGD16
5114 || r_type == R_PPC64_GOT_TPREL16_DS
5115 || r_type == R_PPC64_GOT_DTPREL16_DS
5116 || r_type == R_PPC64_GOT16
5117 || r_type == R_PPC64_GOT16_DS)
5118 {
5119 htab->do_multi_toc = 1;
5120 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5121 }
5122
5123 if (ppc64_elf_tdata (abfd)->got == NULL
5124 && !create_got_section (abfd, info))
5125 return FALSE;
5126
5127 if (h != NULL)
5128 {
5129 struct ppc_link_hash_entry *eh;
5130 struct got_entry *ent;
5131
5132 eh = (struct ppc_link_hash_entry *) h;
5133 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5134 if (ent->addend == rel->r_addend
5135 && ent->owner == abfd
5136 && ent->tls_type == tls_type)
5137 break;
5138 if (ent == NULL)
5139 {
5140 bfd_size_type amt = sizeof (*ent);
5141 ent = bfd_alloc (abfd, amt);
5142 if (ent == NULL)
5143 return FALSE;
5144 ent->next = eh->elf.got.glist;
5145 ent->addend = rel->r_addend;
5146 ent->owner = abfd;
5147 ent->tls_type = tls_type;
5148 ent->is_indirect = FALSE;
5149 ent->got.refcount = 0;
5150 eh->elf.got.glist = ent;
5151 }
5152 ent->got.refcount += 1;
5153 eh->tls_mask |= tls_type;
5154 }
5155 else
5156 /* This is a global offset table entry for a local symbol. */
5157 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5158 rel->r_addend, tls_type))
5159 return FALSE;
5160 break;
5161
5162 case R_PPC64_PLT16_HA:
5163 case R_PPC64_PLT16_HI:
5164 case R_PPC64_PLT16_LO:
5165 case R_PPC64_PLT32:
5166 case R_PPC64_PLT64:
5167 /* This symbol requires a procedure linkage table entry. We
5168 actually build the entry in adjust_dynamic_symbol,
5169 because this might be a case of linking PIC code without
5170 linking in any dynamic objects, in which case we don't
5171 need to generate a procedure linkage table after all. */
5172 if (h == NULL)
5173 {
5174 /* It does not make sense to have a procedure linkage
5175 table entry for a local symbol. */
5176 bfd_set_error (bfd_error_bad_value);
5177 return FALSE;
5178 }
5179 else
5180 {
5181 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5182 return FALSE;
5183 h->needs_plt = 1;
5184 if (h->root.root.string[0] == '.'
5185 && h->root.root.string[1] != '\0')
5186 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5187 }
5188 break;
5189
5190 /* The following relocations don't need to propagate the
5191 relocation if linking a shared object since they are
5192 section relative. */
5193 case R_PPC64_SECTOFF:
5194 case R_PPC64_SECTOFF_LO:
5195 case R_PPC64_SECTOFF_HI:
5196 case R_PPC64_SECTOFF_HA:
5197 case R_PPC64_SECTOFF_DS:
5198 case R_PPC64_SECTOFF_LO_DS:
5199 case R_PPC64_DTPREL16:
5200 case R_PPC64_DTPREL16_LO:
5201 case R_PPC64_DTPREL16_HI:
5202 case R_PPC64_DTPREL16_HA:
5203 case R_PPC64_DTPREL16_DS:
5204 case R_PPC64_DTPREL16_LO_DS:
5205 case R_PPC64_DTPREL16_HIGHER:
5206 case R_PPC64_DTPREL16_HIGHERA:
5207 case R_PPC64_DTPREL16_HIGHEST:
5208 case R_PPC64_DTPREL16_HIGHESTA:
5209 break;
5210
5211 /* Nor do these. */
5212 case R_PPC64_REL16:
5213 case R_PPC64_REL16_LO:
5214 case R_PPC64_REL16_HI:
5215 case R_PPC64_REL16_HA:
5216 break;
5217
5218 case R_PPC64_TOC16:
5219 case R_PPC64_TOC16_DS:
5220 htab->do_multi_toc = 1;
5221 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5222 case R_PPC64_TOC16_LO:
5223 case R_PPC64_TOC16_HI:
5224 case R_PPC64_TOC16_HA:
5225 case R_PPC64_TOC16_LO_DS:
5226 sec->has_toc_reloc = 1;
5227 break;
5228
5229 /* This relocation describes the C++ object vtable hierarchy.
5230 Reconstruct it for later use during GC. */
5231 case R_PPC64_GNU_VTINHERIT:
5232 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5233 return FALSE;
5234 break;
5235
5236 /* This relocation describes which C++ vtable entries are actually
5237 used. Record for later use during GC. */
5238 case R_PPC64_GNU_VTENTRY:
5239 BFD_ASSERT (h != NULL);
5240 if (h != NULL
5241 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5242 return FALSE;
5243 break;
5244
5245 case R_PPC64_REL14:
5246 case R_PPC64_REL14_BRTAKEN:
5247 case R_PPC64_REL14_BRNTAKEN:
5248 {
5249 asection *dest = NULL;
5250
5251 /* Heuristic: If jumping outside our section, chances are
5252 we are going to need a stub. */
5253 if (h != NULL)
5254 {
5255 /* If the sym is weak it may be overridden later, so
5256 don't assume we know where a weak sym lives. */
5257 if (h->root.type == bfd_link_hash_defined)
5258 dest = h->root.u.def.section;
5259 }
5260 else
5261 {
5262 Elf_Internal_Sym *isym;
5263
5264 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5265 abfd, r_symndx);
5266 if (isym == NULL)
5267 return FALSE;
5268
5269 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5270 }
5271
5272 if (dest != sec)
5273 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5274 }
5275 /* Fall through. */
5276
5277 case R_PPC64_REL24:
5278 if (h != NULL && ifunc == NULL)
5279 {
5280 /* We may need a .plt entry if the function this reloc
5281 refers to is in a shared lib. */
5282 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5283 return FALSE;
5284 h->needs_plt = 1;
5285 if (h->root.root.string[0] == '.'
5286 && h->root.root.string[1] != '\0')
5287 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5288 if (h == tga || h == dottga)
5289 sec->has_tls_reloc = 1;
5290 }
5291 break;
5292
5293 case R_PPC64_TPREL64:
5294 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5295 if (!info->executable)
5296 info->flags |= DF_STATIC_TLS;
5297 goto dotlstoc;
5298
5299 case R_PPC64_DTPMOD64:
5300 if (rel + 1 < rel_end
5301 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5302 && rel[1].r_offset == rel->r_offset + 8)
5303 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5304 else
5305 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5306 goto dotlstoc;
5307
5308 case R_PPC64_DTPREL64:
5309 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5310 if (rel != relocs
5311 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5312 && rel[-1].r_offset == rel->r_offset - 8)
5313 /* This is the second reloc of a dtpmod, dtprel pair.
5314 Don't mark with TLS_DTPREL. */
5315 goto dodyn;
5316
5317 dotlstoc:
5318 sec->has_tls_reloc = 1;
5319 if (h != NULL)
5320 {
5321 struct ppc_link_hash_entry *eh;
5322 eh = (struct ppc_link_hash_entry *) h;
5323 eh->tls_mask |= tls_type;
5324 }
5325 else
5326 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5327 rel->r_addend, tls_type))
5328 return FALSE;
5329
5330 ppc64_sec = ppc64_elf_section_data (sec);
5331 if (ppc64_sec->sec_type != sec_toc)
5332 {
5333 bfd_size_type amt;
5334
5335 /* One extra to simplify get_tls_mask. */
5336 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5337 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5338 if (ppc64_sec->u.toc.symndx == NULL)
5339 return FALSE;
5340 amt = sec->size * sizeof (bfd_vma) / 8;
5341 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5342 if (ppc64_sec->u.toc.add == NULL)
5343 return FALSE;
5344 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5345 ppc64_sec->sec_type = sec_toc;
5346 }
5347 BFD_ASSERT (rel->r_offset % 8 == 0);
5348 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5349 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5350
5351 /* Mark the second slot of a GD or LD entry.
5352 -1 to indicate GD and -2 to indicate LD. */
5353 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5354 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5355 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5356 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5357 goto dodyn;
5358
5359 case R_PPC64_TPREL16:
5360 case R_PPC64_TPREL16_LO:
5361 case R_PPC64_TPREL16_HI:
5362 case R_PPC64_TPREL16_HA:
5363 case R_PPC64_TPREL16_DS:
5364 case R_PPC64_TPREL16_LO_DS:
5365 case R_PPC64_TPREL16_HIGHER:
5366 case R_PPC64_TPREL16_HIGHERA:
5367 case R_PPC64_TPREL16_HIGHEST:
5368 case R_PPC64_TPREL16_HIGHESTA:
5369 if (info->shared)
5370 {
5371 if (!info->executable)
5372 info->flags |= DF_STATIC_TLS;
5373 goto dodyn;
5374 }
5375 break;
5376
5377 case R_PPC64_ADDR64:
5378 if (opd_sym_map != NULL
5379 && rel + 1 < rel_end
5380 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5381 {
5382 if (h != NULL)
5383 {
5384 if (h->root.root.string[0] == '.'
5385 && h->root.root.string[1] != 0
5386 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5387 ;
5388 else
5389 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5390 }
5391 else
5392 {
5393 asection *s;
5394 Elf_Internal_Sym *isym;
5395
5396 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5397 abfd, r_symndx);
5398 if (isym == NULL)
5399 return FALSE;
5400
5401 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5402 if (s != NULL && s != sec)
5403 opd_sym_map[rel->r_offset / 8] = s;
5404 }
5405 }
5406 /* Fall through. */
5407
5408 case R_PPC64_REL30:
5409 case R_PPC64_REL32:
5410 case R_PPC64_REL64:
5411 case R_PPC64_ADDR14:
5412 case R_PPC64_ADDR14_BRNTAKEN:
5413 case R_PPC64_ADDR14_BRTAKEN:
5414 case R_PPC64_ADDR16:
5415 case R_PPC64_ADDR16_DS:
5416 case R_PPC64_ADDR16_HA:
5417 case R_PPC64_ADDR16_HI:
5418 case R_PPC64_ADDR16_HIGHER:
5419 case R_PPC64_ADDR16_HIGHERA:
5420 case R_PPC64_ADDR16_HIGHEST:
5421 case R_PPC64_ADDR16_HIGHESTA:
5422 case R_PPC64_ADDR16_LO:
5423 case R_PPC64_ADDR16_LO_DS:
5424 case R_PPC64_ADDR24:
5425 case R_PPC64_ADDR32:
5426 case R_PPC64_UADDR16:
5427 case R_PPC64_UADDR32:
5428 case R_PPC64_UADDR64:
5429 case R_PPC64_TOC:
5430 if (h != NULL && !info->shared)
5431 /* We may need a copy reloc. */
5432 h->non_got_ref = 1;
5433
5434 /* Don't propagate .opd relocs. */
5435 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5436 break;
5437
5438 /* If we are creating a shared library, and this is a reloc
5439 against a global symbol, or a non PC relative reloc
5440 against a local symbol, then we need to copy the reloc
5441 into the shared library. However, if we are linking with
5442 -Bsymbolic, we do not need to copy a reloc against a
5443 global symbol which is defined in an object we are
5444 including in the link (i.e., DEF_REGULAR is set). At
5445 this point we have not seen all the input files, so it is
5446 possible that DEF_REGULAR is not set now but will be set
5447 later (it is never cleared). In case of a weak definition,
5448 DEF_REGULAR may be cleared later by a strong definition in
5449 a shared library. We account for that possibility below by
5450 storing information in the dyn_relocs field of the hash
5451 table entry. A similar situation occurs when creating
5452 shared libraries and symbol visibility changes render the
5453 symbol local.
5454
5455 If on the other hand, we are creating an executable, we
5456 may need to keep relocations for symbols satisfied by a
5457 dynamic library if we manage to avoid copy relocs for the
5458 symbol. */
5459 dodyn:
5460 if ((info->shared
5461 && (must_be_dyn_reloc (info, r_type)
5462 || (h != NULL
5463 && (!SYMBOLIC_BIND (info, h)
5464 || h->root.type == bfd_link_hash_defweak
5465 || !h->def_regular))))
5466 || (ELIMINATE_COPY_RELOCS
5467 && !info->shared
5468 && h != NULL
5469 && (h->root.type == bfd_link_hash_defweak
5470 || !h->def_regular))
5471 || (!info->shared
5472 && ifunc != NULL))
5473 {
5474 /* We must copy these reloc types into the output file.
5475 Create a reloc section in dynobj and make room for
5476 this reloc. */
5477 if (sreloc == NULL)
5478 {
5479 sreloc = _bfd_elf_make_dynamic_reloc_section
5480 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5481
5482 if (sreloc == NULL)
5483 return FALSE;
5484 }
5485
5486 /* If this is a global symbol, we count the number of
5487 relocations we need for this symbol. */
5488 if (h != NULL)
5489 {
5490 struct elf_dyn_relocs *p;
5491 struct elf_dyn_relocs **head;
5492
5493 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5494 p = *head;
5495 if (p == NULL || p->sec != sec)
5496 {
5497 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5498 if (p == NULL)
5499 return FALSE;
5500 p->next = *head;
5501 *head = p;
5502 p->sec = sec;
5503 p->count = 0;
5504 p->pc_count = 0;
5505 }
5506 p->count += 1;
5507 if (!must_be_dyn_reloc (info, r_type))
5508 p->pc_count += 1;
5509 }
5510 else
5511 {
5512 /* Track dynamic relocs needed for local syms too.
5513 We really need local syms available to do this
5514 easily. Oh well. */
5515 struct ppc_dyn_relocs *p;
5516 struct ppc_dyn_relocs **head;
5517 bfd_boolean is_ifunc;
5518 asection *s;
5519 void *vpp;
5520 Elf_Internal_Sym *isym;
5521
5522 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5523 abfd, r_symndx);
5524 if (isym == NULL)
5525 return FALSE;
5526
5527 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5528 if (s == NULL)
5529 s = sec;
5530
5531 vpp = &elf_section_data (s)->local_dynrel;
5532 head = (struct ppc_dyn_relocs **) vpp;
5533 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5534 p = *head;
5535 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5536 p = p->next;
5537 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5538 {
5539 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5540 if (p == NULL)
5541 return FALSE;
5542 p->next = *head;
5543 *head = p;
5544 p->sec = sec;
5545 p->ifunc = is_ifunc;
5546 p->count = 0;
5547 }
5548 p->count += 1;
5549 }
5550 }
5551 break;
5552
5553 default:
5554 break;
5555 }
5556 }
5557
5558 return TRUE;
5559 }
5560
5561 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5562 of the code entry point, and its section. */
5563
5564 static bfd_vma
5565 opd_entry_value (asection *opd_sec,
5566 bfd_vma offset,
5567 asection **code_sec,
5568 bfd_vma *code_off,
5569 bfd_boolean in_code_sec)
5570 {
5571 bfd *opd_bfd = opd_sec->owner;
5572 Elf_Internal_Rela *relocs;
5573 Elf_Internal_Rela *lo, *hi, *look;
5574 bfd_vma val;
5575
5576 /* No relocs implies we are linking a --just-symbols object, or looking
5577 at a final linked executable with addr2line or somesuch. */
5578 if (opd_sec->reloc_count == 0)
5579 {
5580 char buf[8];
5581
5582 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5583 return (bfd_vma) -1;
5584
5585 val = bfd_get_64 (opd_bfd, buf);
5586 if (code_sec != NULL)
5587 {
5588 asection *sec, *likely = NULL;
5589
5590 if (in_code_sec)
5591 {
5592 sec = *code_sec;
5593 if (sec->vma <= val
5594 && val < sec->vma + sec->size)
5595 likely = sec;
5596 else
5597 val = -1;
5598 }
5599 else
5600 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5601 if (sec->vma <= val
5602 && (sec->flags & SEC_LOAD) != 0
5603 && (sec->flags & SEC_ALLOC) != 0)
5604 likely = sec;
5605 if (likely != NULL)
5606 {
5607 *code_sec = likely;
5608 if (code_off != NULL)
5609 *code_off = val - likely->vma;
5610 }
5611 }
5612 return val;
5613 }
5614
5615 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5616
5617 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5618 if (relocs == NULL)
5619 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5620
5621 /* Go find the opd reloc at the sym address. */
5622 lo = relocs;
5623 BFD_ASSERT (lo != NULL);
5624 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5625 val = (bfd_vma) -1;
5626 while (lo < hi)
5627 {
5628 look = lo + (hi - lo) / 2;
5629 if (look->r_offset < offset)
5630 lo = look + 1;
5631 else if (look->r_offset > offset)
5632 hi = look;
5633 else
5634 {
5635 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5636
5637 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5638 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5639 {
5640 unsigned long symndx = ELF64_R_SYM (look->r_info);
5641 asection *sec;
5642
5643 if (symndx < symtab_hdr->sh_info
5644 || elf_sym_hashes (opd_bfd) == NULL)
5645 {
5646 Elf_Internal_Sym *sym;
5647
5648 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5649 if (sym == NULL)
5650 {
5651 size_t symcnt = symtab_hdr->sh_info;
5652 if (elf_sym_hashes (opd_bfd) == NULL)
5653 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5654 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5655 0, NULL, NULL, NULL);
5656 if (sym == NULL)
5657 break;
5658 symtab_hdr->contents = (bfd_byte *) sym;
5659 }
5660
5661 sym += symndx;
5662 val = sym->st_value;
5663 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5664 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5665 }
5666 else
5667 {
5668 struct elf_link_hash_entry **sym_hashes;
5669 struct elf_link_hash_entry *rh;
5670
5671 sym_hashes = elf_sym_hashes (opd_bfd);
5672 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5673 if (rh != NULL)
5674 {
5675 rh = elf_follow_link (rh);
5676 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5677 || rh->root.type == bfd_link_hash_defweak);
5678 val = rh->root.u.def.value;
5679 sec = rh->root.u.def.section;
5680 }
5681 else
5682 {
5683 /* Handle the odd case where we can be called
5684 during bfd_elf_link_add_symbols before the
5685 symbol hashes have been fully populated. */
5686 Elf_Internal_Sym *sym;
5687
5688 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5689 symndx, NULL, NULL, NULL);
5690 if (sym == NULL)
5691 break;
5692
5693 val = sym->st_value;
5694 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5695 free (sym);
5696 }
5697 }
5698 val += look->r_addend;
5699 if (code_off != NULL)
5700 *code_off = val;
5701 if (code_sec != NULL)
5702 {
5703 if (in_code_sec && *code_sec != sec)
5704 return -1;
5705 else
5706 *code_sec = sec;
5707 }
5708 if (sec != NULL && sec->output_section != NULL)
5709 val += sec->output_section->vma + sec->output_offset;
5710 }
5711 break;
5712 }
5713 }
5714
5715 return val;
5716 }
5717
5718 /* If the ELF symbol SYM might be a function in SEC, return the
5719 function size and set *CODE_OFF to the function's entry point,
5720 otherwise return zero. */
5721
5722 static bfd_size_type
5723 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5724 bfd_vma *code_off)
5725 {
5726 bfd_size_type size;
5727
5728 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5729 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5730 return 0;
5731
5732 size = 0;
5733 if (!(sym->flags & BSF_SYNTHETIC))
5734 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5735
5736 if (strcmp (sym->section->name, ".opd") == 0)
5737 {
5738 if (opd_entry_value (sym->section, sym->value,
5739 &sec, code_off, TRUE) == (bfd_vma) -1)
5740 return 0;
5741 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5742 symbol. This size has nothing to do with the code size of the
5743 function, which is what we're supposed to return, but the
5744 code size isn't available without looking up the dot-sym.
5745 However, doing that would be a waste of time particularly
5746 since elf_find_function will look at the dot-sym anyway.
5747 Now, elf_find_function will keep the largest size of any
5748 function sym found at the code address of interest, so return
5749 1 here to avoid it incorrectly caching a larger function size
5750 for a small function. This does mean we return the wrong
5751 size for a new-ABI function of size 24, but all that does is
5752 disable caching for such functions. */
5753 if (size == 24)
5754 size = 1;
5755 }
5756 else
5757 {
5758 if (sym->section != sec)
5759 return 0;
5760 *code_off = sym->value;
5761 }
5762 if (size == 0)
5763 size = 1;
5764 return size;
5765 }
5766
5767 /* Return true if symbol is defined in a regular object file. */
5768
5769 static bfd_boolean
5770 is_static_defined (struct elf_link_hash_entry *h)
5771 {
5772 return ((h->root.type == bfd_link_hash_defined
5773 || h->root.type == bfd_link_hash_defweak)
5774 && h->root.u.def.section != NULL
5775 && h->root.u.def.section->output_section != NULL);
5776 }
5777
5778 /* If FDH is a function descriptor symbol, return the associated code
5779 entry symbol if it is defined. Return NULL otherwise. */
5780
5781 static struct ppc_link_hash_entry *
5782 defined_code_entry (struct ppc_link_hash_entry *fdh)
5783 {
5784 if (fdh->is_func_descriptor)
5785 {
5786 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5787 if (fh->elf.root.type == bfd_link_hash_defined
5788 || fh->elf.root.type == bfd_link_hash_defweak)
5789 return fh;
5790 }
5791 return NULL;
5792 }
5793
5794 /* If FH is a function code entry symbol, return the associated
5795 function descriptor symbol if it is defined. Return NULL otherwise. */
5796
5797 static struct ppc_link_hash_entry *
5798 defined_func_desc (struct ppc_link_hash_entry *fh)
5799 {
5800 if (fh->oh != NULL
5801 && fh->oh->is_func_descriptor)
5802 {
5803 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5804 if (fdh->elf.root.type == bfd_link_hash_defined
5805 || fdh->elf.root.type == bfd_link_hash_defweak)
5806 return fdh;
5807 }
5808 return NULL;
5809 }
5810
5811 /* Mark all our entry sym sections, both opd and code section. */
5812
5813 static void
5814 ppc64_elf_gc_keep (struct bfd_link_info *info)
5815 {
5816 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5817 struct bfd_sym_chain *sym;
5818
5819 if (htab == NULL)
5820 return;
5821
5822 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5823 {
5824 struct ppc_link_hash_entry *eh, *fh;
5825 asection *sec;
5826
5827 eh = (struct ppc_link_hash_entry *)
5828 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5829 if (eh == NULL)
5830 continue;
5831 if (eh->elf.root.type != bfd_link_hash_defined
5832 && eh->elf.root.type != bfd_link_hash_defweak)
5833 continue;
5834
5835 fh = defined_code_entry (eh);
5836 if (fh != NULL)
5837 {
5838 sec = fh->elf.root.u.def.section;
5839 sec->flags |= SEC_KEEP;
5840 }
5841 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5842 && opd_entry_value (eh->elf.root.u.def.section,
5843 eh->elf.root.u.def.value,
5844 &sec, NULL, FALSE) != (bfd_vma) -1)
5845 sec->flags |= SEC_KEEP;
5846
5847 sec = eh->elf.root.u.def.section;
5848 sec->flags |= SEC_KEEP;
5849 }
5850 }
5851
5852 /* Mark sections containing dynamically referenced symbols. When
5853 building shared libraries, we must assume that any visible symbol is
5854 referenced. */
5855
5856 static bfd_boolean
5857 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5858 {
5859 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5860 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5861 struct ppc_link_hash_entry *fdh;
5862
5863 /* Dynamic linking info is on the func descriptor sym. */
5864 fdh = defined_func_desc (eh);
5865 if (fdh != NULL)
5866 eh = fdh;
5867
5868 if ((eh->elf.root.type == bfd_link_hash_defined
5869 || eh->elf.root.type == bfd_link_hash_defweak)
5870 && (eh->elf.ref_dynamic
5871 || (!info->executable
5872 && eh->elf.def_regular
5873 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5874 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5875 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5876 || !bfd_hide_sym_by_version (info->version_info,
5877 eh->elf.root.root.string)))))
5878 {
5879 asection *code_sec;
5880 struct ppc_link_hash_entry *fh;
5881
5882 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5883
5884 /* Function descriptor syms cause the associated
5885 function code sym section to be marked. */
5886 fh = defined_code_entry (eh);
5887 if (fh != NULL)
5888 {
5889 code_sec = fh->elf.root.u.def.section;
5890 code_sec->flags |= SEC_KEEP;
5891 }
5892 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5893 && opd_entry_value (eh->elf.root.u.def.section,
5894 eh->elf.root.u.def.value,
5895 &code_sec, NULL, FALSE) != (bfd_vma) -1)
5896 code_sec->flags |= SEC_KEEP;
5897 }
5898
5899 return TRUE;
5900 }
5901
5902 /* Return the section that should be marked against GC for a given
5903 relocation. */
5904
5905 static asection *
5906 ppc64_elf_gc_mark_hook (asection *sec,
5907 struct bfd_link_info *info,
5908 Elf_Internal_Rela *rel,
5909 struct elf_link_hash_entry *h,
5910 Elf_Internal_Sym *sym)
5911 {
5912 asection *rsec;
5913
5914 /* Syms return NULL if we're marking .opd, so we avoid marking all
5915 function sections, as all functions are referenced in .opd. */
5916 rsec = NULL;
5917 if (get_opd_info (sec) != NULL)
5918 return rsec;
5919
5920 if (h != NULL)
5921 {
5922 enum elf_ppc64_reloc_type r_type;
5923 struct ppc_link_hash_entry *eh, *fh, *fdh;
5924
5925 r_type = ELF64_R_TYPE (rel->r_info);
5926 switch (r_type)
5927 {
5928 case R_PPC64_GNU_VTINHERIT:
5929 case R_PPC64_GNU_VTENTRY:
5930 break;
5931
5932 default:
5933 switch (h->root.type)
5934 {
5935 case bfd_link_hash_defined:
5936 case bfd_link_hash_defweak:
5937 eh = (struct ppc_link_hash_entry *) h;
5938 fdh = defined_func_desc (eh);
5939 if (fdh != NULL)
5940 eh = fdh;
5941
5942 /* Function descriptor syms cause the associated
5943 function code sym section to be marked. */
5944 fh = defined_code_entry (eh);
5945 if (fh != NULL)
5946 {
5947 /* They also mark their opd section. */
5948 eh->elf.root.u.def.section->gc_mark = 1;
5949
5950 rsec = fh->elf.root.u.def.section;
5951 }
5952 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5953 && opd_entry_value (eh->elf.root.u.def.section,
5954 eh->elf.root.u.def.value,
5955 &rsec, NULL, FALSE) != (bfd_vma) -1)
5956 eh->elf.root.u.def.section->gc_mark = 1;
5957 else
5958 rsec = h->root.u.def.section;
5959 break;
5960
5961 case bfd_link_hash_common:
5962 rsec = h->root.u.c.p->section;
5963 break;
5964
5965 default:
5966 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5967 }
5968 }
5969 }
5970 else
5971 {
5972 struct _opd_sec_data *opd;
5973
5974 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5975 opd = get_opd_info (rsec);
5976 if (opd != NULL && opd->func_sec != NULL)
5977 {
5978 rsec->gc_mark = 1;
5979
5980 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5981 }
5982 }
5983
5984 return rsec;
5985 }
5986
5987 /* Update the .got, .plt. and dynamic reloc reference counts for the
5988 section being removed. */
5989
5990 static bfd_boolean
5991 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5992 asection *sec, const Elf_Internal_Rela *relocs)
5993 {
5994 struct ppc_link_hash_table *htab;
5995 Elf_Internal_Shdr *symtab_hdr;
5996 struct elf_link_hash_entry **sym_hashes;
5997 struct got_entry **local_got_ents;
5998 const Elf_Internal_Rela *rel, *relend;
5999
6000 if (info->relocatable)
6001 return TRUE;
6002
6003 if ((sec->flags & SEC_ALLOC) == 0)
6004 return TRUE;
6005
6006 elf_section_data (sec)->local_dynrel = NULL;
6007
6008 htab = ppc_hash_table (info);
6009 if (htab == NULL)
6010 return FALSE;
6011
6012 symtab_hdr = &elf_symtab_hdr (abfd);
6013 sym_hashes = elf_sym_hashes (abfd);
6014 local_got_ents = elf_local_got_ents (abfd);
6015
6016 relend = relocs + sec->reloc_count;
6017 for (rel = relocs; rel < relend; rel++)
6018 {
6019 unsigned long r_symndx;
6020 enum elf_ppc64_reloc_type r_type;
6021 struct elf_link_hash_entry *h = NULL;
6022 unsigned char tls_type = 0;
6023
6024 r_symndx = ELF64_R_SYM (rel->r_info);
6025 r_type = ELF64_R_TYPE (rel->r_info);
6026 if (r_symndx >= symtab_hdr->sh_info)
6027 {
6028 struct ppc_link_hash_entry *eh;
6029 struct elf_dyn_relocs **pp;
6030 struct elf_dyn_relocs *p;
6031
6032 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6033 h = elf_follow_link (h);
6034 eh = (struct ppc_link_hash_entry *) h;
6035
6036 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6037 if (p->sec == sec)
6038 {
6039 /* Everything must go for SEC. */
6040 *pp = p->next;
6041 break;
6042 }
6043 }
6044
6045 if (is_branch_reloc (r_type))
6046 {
6047 struct plt_entry **ifunc = NULL;
6048 if (h != NULL)
6049 {
6050 if (h->type == STT_GNU_IFUNC)
6051 ifunc = &h->plt.plist;
6052 }
6053 else if (local_got_ents != NULL)
6054 {
6055 struct plt_entry **local_plt = (struct plt_entry **)
6056 (local_got_ents + symtab_hdr->sh_info);
6057 unsigned char *local_got_tls_masks = (unsigned char *)
6058 (local_plt + symtab_hdr->sh_info);
6059 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6060 ifunc = local_plt + r_symndx;
6061 }
6062 if (ifunc != NULL)
6063 {
6064 struct plt_entry *ent;
6065
6066 for (ent = *ifunc; ent != NULL; ent = ent->next)
6067 if (ent->addend == rel->r_addend)
6068 break;
6069 if (ent == NULL)
6070 abort ();
6071 if (ent->plt.refcount > 0)
6072 ent->plt.refcount -= 1;
6073 continue;
6074 }
6075 }
6076
6077 switch (r_type)
6078 {
6079 case R_PPC64_GOT_TLSLD16:
6080 case R_PPC64_GOT_TLSLD16_LO:
6081 case R_PPC64_GOT_TLSLD16_HI:
6082 case R_PPC64_GOT_TLSLD16_HA:
6083 tls_type = TLS_TLS | TLS_LD;
6084 goto dogot;
6085
6086 case R_PPC64_GOT_TLSGD16:
6087 case R_PPC64_GOT_TLSGD16_LO:
6088 case R_PPC64_GOT_TLSGD16_HI:
6089 case R_PPC64_GOT_TLSGD16_HA:
6090 tls_type = TLS_TLS | TLS_GD;
6091 goto dogot;
6092
6093 case R_PPC64_GOT_TPREL16_DS:
6094 case R_PPC64_GOT_TPREL16_LO_DS:
6095 case R_PPC64_GOT_TPREL16_HI:
6096 case R_PPC64_GOT_TPREL16_HA:
6097 tls_type = TLS_TLS | TLS_TPREL;
6098 goto dogot;
6099
6100 case R_PPC64_GOT_DTPREL16_DS:
6101 case R_PPC64_GOT_DTPREL16_LO_DS:
6102 case R_PPC64_GOT_DTPREL16_HI:
6103 case R_PPC64_GOT_DTPREL16_HA:
6104 tls_type = TLS_TLS | TLS_DTPREL;
6105 goto dogot;
6106
6107 case R_PPC64_GOT16:
6108 case R_PPC64_GOT16_DS:
6109 case R_PPC64_GOT16_HA:
6110 case R_PPC64_GOT16_HI:
6111 case R_PPC64_GOT16_LO:
6112 case R_PPC64_GOT16_LO_DS:
6113 dogot:
6114 {
6115 struct got_entry *ent;
6116
6117 if (h != NULL)
6118 ent = h->got.glist;
6119 else
6120 ent = local_got_ents[r_symndx];
6121
6122 for (; ent != NULL; ent = ent->next)
6123 if (ent->addend == rel->r_addend
6124 && ent->owner == abfd
6125 && ent->tls_type == tls_type)
6126 break;
6127 if (ent == NULL)
6128 abort ();
6129 if (ent->got.refcount > 0)
6130 ent->got.refcount -= 1;
6131 }
6132 break;
6133
6134 case R_PPC64_PLT16_HA:
6135 case R_PPC64_PLT16_HI:
6136 case R_PPC64_PLT16_LO:
6137 case R_PPC64_PLT32:
6138 case R_PPC64_PLT64:
6139 case R_PPC64_REL14:
6140 case R_PPC64_REL14_BRNTAKEN:
6141 case R_PPC64_REL14_BRTAKEN:
6142 case R_PPC64_REL24:
6143 if (h != NULL)
6144 {
6145 struct plt_entry *ent;
6146
6147 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6148 if (ent->addend == rel->r_addend)
6149 break;
6150 if (ent != NULL && ent->plt.refcount > 0)
6151 ent->plt.refcount -= 1;
6152 }
6153 break;
6154
6155 default:
6156 break;
6157 }
6158 }
6159 return TRUE;
6160 }
6161
6162 /* The maximum size of .sfpr. */
6163 #define SFPR_MAX (218*4)
6164
6165 struct sfpr_def_parms
6166 {
6167 const char name[12];
6168 unsigned char lo, hi;
6169 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6170 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6171 };
6172
6173 /* Auto-generate _save*, _rest* functions in .sfpr. */
6174
6175 static bfd_boolean
6176 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6177 {
6178 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6179 unsigned int i;
6180 size_t len = strlen (parm->name);
6181 bfd_boolean writing = FALSE;
6182 char sym[16];
6183
6184 if (htab == NULL)
6185 return FALSE;
6186
6187 memcpy (sym, parm->name, len);
6188 sym[len + 2] = 0;
6189
6190 for (i = parm->lo; i <= parm->hi; i++)
6191 {
6192 struct elf_link_hash_entry *h;
6193
6194 sym[len + 0] = i / 10 + '0';
6195 sym[len + 1] = i % 10 + '0';
6196 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6197 if (h != NULL
6198 && !h->def_regular)
6199 {
6200 h->root.type = bfd_link_hash_defined;
6201 h->root.u.def.section = htab->sfpr;
6202 h->root.u.def.value = htab->sfpr->size;
6203 h->type = STT_FUNC;
6204 h->def_regular = 1;
6205 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6206 writing = TRUE;
6207 if (htab->sfpr->contents == NULL)
6208 {
6209 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6210 if (htab->sfpr->contents == NULL)
6211 return FALSE;
6212 }
6213 }
6214 if (writing)
6215 {
6216 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6217 if (i != parm->hi)
6218 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6219 else
6220 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6221 htab->sfpr->size = p - htab->sfpr->contents;
6222 }
6223 }
6224
6225 return TRUE;
6226 }
6227
6228 static bfd_byte *
6229 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6230 {
6231 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6232 return p + 4;
6233 }
6234
6235 static bfd_byte *
6236 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6237 {
6238 p = savegpr0 (abfd, p, r);
6239 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6240 p = p + 4;
6241 bfd_put_32 (abfd, BLR, p);
6242 return p + 4;
6243 }
6244
6245 static bfd_byte *
6246 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6247 {
6248 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6249 return p + 4;
6250 }
6251
6252 static bfd_byte *
6253 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6254 {
6255 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6256 p = p + 4;
6257 p = restgpr0 (abfd, p, r);
6258 bfd_put_32 (abfd, MTLR_R0, p);
6259 p = p + 4;
6260 if (r == 29)
6261 {
6262 p = restgpr0 (abfd, p, 30);
6263 p = restgpr0 (abfd, p, 31);
6264 }
6265 bfd_put_32 (abfd, BLR, p);
6266 return p + 4;
6267 }
6268
6269 static bfd_byte *
6270 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6271 {
6272 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6273 return p + 4;
6274 }
6275
6276 static bfd_byte *
6277 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6278 {
6279 p = savegpr1 (abfd, p, r);
6280 bfd_put_32 (abfd, BLR, p);
6281 return p + 4;
6282 }
6283
6284 static bfd_byte *
6285 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6286 {
6287 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6288 return p + 4;
6289 }
6290
6291 static bfd_byte *
6292 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6293 {
6294 p = restgpr1 (abfd, p, r);
6295 bfd_put_32 (abfd, BLR, p);
6296 return p + 4;
6297 }
6298
6299 static bfd_byte *
6300 savefpr (bfd *abfd, bfd_byte *p, int r)
6301 {
6302 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6303 return p + 4;
6304 }
6305
6306 static bfd_byte *
6307 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6308 {
6309 p = savefpr (abfd, p, r);
6310 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6311 p = p + 4;
6312 bfd_put_32 (abfd, BLR, p);
6313 return p + 4;
6314 }
6315
6316 static bfd_byte *
6317 restfpr (bfd *abfd, bfd_byte *p, int r)
6318 {
6319 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6320 return p + 4;
6321 }
6322
6323 static bfd_byte *
6324 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6325 {
6326 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6327 p = p + 4;
6328 p = restfpr (abfd, p, r);
6329 bfd_put_32 (abfd, MTLR_R0, p);
6330 p = p + 4;
6331 if (r == 29)
6332 {
6333 p = restfpr (abfd, p, 30);
6334 p = restfpr (abfd, p, 31);
6335 }
6336 bfd_put_32 (abfd, BLR, p);
6337 return p + 4;
6338 }
6339
6340 static bfd_byte *
6341 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6342 {
6343 p = savefpr (abfd, p, r);
6344 bfd_put_32 (abfd, BLR, p);
6345 return p + 4;
6346 }
6347
6348 static bfd_byte *
6349 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6350 {
6351 p = restfpr (abfd, p, r);
6352 bfd_put_32 (abfd, BLR, p);
6353 return p + 4;
6354 }
6355
6356 static bfd_byte *
6357 savevr (bfd *abfd, bfd_byte *p, int r)
6358 {
6359 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6360 p = p + 4;
6361 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6362 return p + 4;
6363 }
6364
6365 static bfd_byte *
6366 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6367 {
6368 p = savevr (abfd, p, r);
6369 bfd_put_32 (abfd, BLR, p);
6370 return p + 4;
6371 }
6372
6373 static bfd_byte *
6374 restvr (bfd *abfd, bfd_byte *p, int r)
6375 {
6376 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6377 p = p + 4;
6378 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6379 return p + 4;
6380 }
6381
6382 static bfd_byte *
6383 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6384 {
6385 p = restvr (abfd, p, r);
6386 bfd_put_32 (abfd, BLR, p);
6387 return p + 4;
6388 }
6389
6390 /* Called via elf_link_hash_traverse to transfer dynamic linking
6391 information on function code symbol entries to their corresponding
6392 function descriptor symbol entries. */
6393
6394 static bfd_boolean
6395 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6396 {
6397 struct bfd_link_info *info;
6398 struct ppc_link_hash_table *htab;
6399 struct plt_entry *ent;
6400 struct ppc_link_hash_entry *fh;
6401 struct ppc_link_hash_entry *fdh;
6402 bfd_boolean force_local;
6403
6404 fh = (struct ppc_link_hash_entry *) h;
6405 if (fh->elf.root.type == bfd_link_hash_indirect)
6406 return TRUE;
6407
6408 info = inf;
6409 htab = ppc_hash_table (info);
6410 if (htab == NULL)
6411 return FALSE;
6412
6413 /* Resolve undefined references to dot-symbols as the value
6414 in the function descriptor, if we have one in a regular object.
6415 This is to satisfy cases like ".quad .foo". Calls to functions
6416 in dynamic objects are handled elsewhere. */
6417 if (fh->elf.root.type == bfd_link_hash_undefweak
6418 && fh->was_undefined
6419 && (fdh = defined_func_desc (fh)) != NULL
6420 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6421 && opd_entry_value (fdh->elf.root.u.def.section,
6422 fdh->elf.root.u.def.value,
6423 &fh->elf.root.u.def.section,
6424 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6425 {
6426 fh->elf.root.type = fdh->elf.root.type;
6427 fh->elf.forced_local = 1;
6428 fh->elf.def_regular = fdh->elf.def_regular;
6429 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6430 }
6431
6432 /* If this is a function code symbol, transfer dynamic linking
6433 information to the function descriptor symbol. */
6434 if (!fh->is_func)
6435 return TRUE;
6436
6437 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6438 if (ent->plt.refcount > 0)
6439 break;
6440 if (ent == NULL
6441 || fh->elf.root.root.string[0] != '.'
6442 || fh->elf.root.root.string[1] == '\0')
6443 return TRUE;
6444
6445 /* Find the corresponding function descriptor symbol. Create it
6446 as undefined if necessary. */
6447
6448 fdh = lookup_fdh (fh, htab);
6449 if (fdh == NULL
6450 && !info->executable
6451 && (fh->elf.root.type == bfd_link_hash_undefined
6452 || fh->elf.root.type == bfd_link_hash_undefweak))
6453 {
6454 fdh = make_fdh (info, fh);
6455 if (fdh == NULL)
6456 return FALSE;
6457 }
6458
6459 /* Fake function descriptors are made undefweak. If the function
6460 code symbol is strong undefined, make the fake sym the same.
6461 If the function code symbol is defined, then force the fake
6462 descriptor local; We can't support overriding of symbols in a
6463 shared library on a fake descriptor. */
6464
6465 if (fdh != NULL
6466 && fdh->fake
6467 && fdh->elf.root.type == bfd_link_hash_undefweak)
6468 {
6469 if (fh->elf.root.type == bfd_link_hash_undefined)
6470 {
6471 fdh->elf.root.type = bfd_link_hash_undefined;
6472 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6473 }
6474 else if (fh->elf.root.type == bfd_link_hash_defined
6475 || fh->elf.root.type == bfd_link_hash_defweak)
6476 {
6477 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6478 }
6479 }
6480
6481 if (fdh != NULL
6482 && !fdh->elf.forced_local
6483 && (!info->executable
6484 || fdh->elf.def_dynamic
6485 || fdh->elf.ref_dynamic
6486 || (fdh->elf.root.type == bfd_link_hash_undefweak
6487 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6488 {
6489 if (fdh->elf.dynindx == -1)
6490 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6491 return FALSE;
6492 fdh->elf.ref_regular |= fh->elf.ref_regular;
6493 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6494 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6495 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6496 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6497 {
6498 move_plt_plist (fh, fdh);
6499 fdh->elf.needs_plt = 1;
6500 }
6501 fdh->is_func_descriptor = 1;
6502 fdh->oh = fh;
6503 fh->oh = fdh;
6504 }
6505
6506 /* Now that the info is on the function descriptor, clear the
6507 function code sym info. Any function code syms for which we
6508 don't have a definition in a regular file, we force local.
6509 This prevents a shared library from exporting syms that have
6510 been imported from another library. Function code syms that
6511 are really in the library we must leave global to prevent the
6512 linker dragging in a definition from a static library. */
6513 force_local = (!fh->elf.def_regular
6514 || fdh == NULL
6515 || !fdh->elf.def_regular
6516 || fdh->elf.forced_local);
6517 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6518
6519 return TRUE;
6520 }
6521
6522 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6523 this hook to a) provide some gcc support functions, and b) transfer
6524 dynamic linking information gathered so far on function code symbol
6525 entries, to their corresponding function descriptor symbol entries. */
6526
6527 static bfd_boolean
6528 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6529 struct bfd_link_info *info)
6530 {
6531 struct ppc_link_hash_table *htab;
6532 unsigned int i;
6533 static const struct sfpr_def_parms funcs[] =
6534 {
6535 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6536 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6537 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6538 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6539 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6540 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6541 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6542 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6543 { "._savef", 14, 31, savefpr, savefpr1_tail },
6544 { "._restf", 14, 31, restfpr, restfpr1_tail },
6545 { "_savevr_", 20, 31, savevr, savevr_tail },
6546 { "_restvr_", 20, 31, restvr, restvr_tail }
6547 };
6548
6549 htab = ppc_hash_table (info);
6550 if (htab == NULL)
6551 return FALSE;
6552
6553 if (htab->elf.hgot != NULL)
6554 {
6555 htab->elf.hgot->root.type = bfd_link_hash_new;
6556 htab->elf.hgot->type = STT_OBJECT;
6557 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6558 }
6559
6560 if (htab->sfpr == NULL)
6561 /* We don't have any relocs. */
6562 return TRUE;
6563
6564 /* Provide any missing _save* and _rest* functions. */
6565 htab->sfpr->size = 0;
6566 if (!info->relocatable)
6567 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6568 if (!sfpr_define (info, &funcs[i]))
6569 return FALSE;
6570
6571 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6572
6573 if (htab->sfpr->size == 0)
6574 htab->sfpr->flags |= SEC_EXCLUDE;
6575
6576 return TRUE;
6577 }
6578
6579 /* Adjust a symbol defined by a dynamic object and referenced by a
6580 regular object. The current definition is in some section of the
6581 dynamic object, but we're not including those sections. We have to
6582 change the definition to something the rest of the link can
6583 understand. */
6584
6585 static bfd_boolean
6586 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6587 struct elf_link_hash_entry *h)
6588 {
6589 struct ppc_link_hash_table *htab;
6590 asection *s;
6591
6592 htab = ppc_hash_table (info);
6593 if (htab == NULL)
6594 return FALSE;
6595
6596 /* Deal with function syms. */
6597 if (h->type == STT_FUNC
6598 || h->type == STT_GNU_IFUNC
6599 || h->needs_plt)
6600 {
6601 /* Clear procedure linkage table information for any symbol that
6602 won't need a .plt entry. */
6603 struct plt_entry *ent;
6604 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6605 if (ent->plt.refcount > 0)
6606 break;
6607 if (ent == NULL
6608 || (h->type != STT_GNU_IFUNC
6609 && (SYMBOL_CALLS_LOCAL (info, h)
6610 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6611 && h->root.type == bfd_link_hash_undefweak))))
6612 {
6613 h->plt.plist = NULL;
6614 h->needs_plt = 0;
6615 }
6616 }
6617 else
6618 h->plt.plist = NULL;
6619
6620 /* If this is a weak symbol, and there is a real definition, the
6621 processor independent code will have arranged for us to see the
6622 real definition first, and we can just use the same value. */
6623 if (h->u.weakdef != NULL)
6624 {
6625 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6626 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6627 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6628 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6629 if (ELIMINATE_COPY_RELOCS)
6630 h->non_got_ref = h->u.weakdef->non_got_ref;
6631 return TRUE;
6632 }
6633
6634 /* If we are creating a shared library, we must presume that the
6635 only references to the symbol are via the global offset table.
6636 For such cases we need not do anything here; the relocations will
6637 be handled correctly by relocate_section. */
6638 if (info->shared)
6639 return TRUE;
6640
6641 /* If there are no references to this symbol that do not use the
6642 GOT, we don't need to generate a copy reloc. */
6643 if (!h->non_got_ref)
6644 return TRUE;
6645
6646 /* Don't generate a copy reloc for symbols defined in the executable. */
6647 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6648 return TRUE;
6649
6650 if (ELIMINATE_COPY_RELOCS)
6651 {
6652 struct ppc_link_hash_entry * eh;
6653 struct elf_dyn_relocs *p;
6654
6655 eh = (struct ppc_link_hash_entry *) h;
6656 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6657 {
6658 s = p->sec->output_section;
6659 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6660 break;
6661 }
6662
6663 /* If we didn't find any dynamic relocs in read-only sections, then
6664 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6665 if (p == NULL)
6666 {
6667 h->non_got_ref = 0;
6668 return TRUE;
6669 }
6670 }
6671
6672 if (h->plt.plist != NULL)
6673 {
6674 /* We should never get here, but unfortunately there are versions
6675 of gcc out there that improperly (for this ABI) put initialized
6676 function pointers, vtable refs and suchlike in read-only
6677 sections. Allow them to proceed, but warn that this might
6678 break at runtime. */
6679 info->callbacks->einfo
6680 (_("%P: copy reloc against `%T' requires lazy plt linking; "
6681 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6682 h->root.root.string);
6683 }
6684
6685 /* This is a reference to a symbol defined by a dynamic object which
6686 is not a function. */
6687
6688 /* We must allocate the symbol in our .dynbss section, which will
6689 become part of the .bss section of the executable. There will be
6690 an entry for this symbol in the .dynsym section. The dynamic
6691 object will contain position independent code, so all references
6692 from the dynamic object to this symbol will go through the global
6693 offset table. The dynamic linker will use the .dynsym entry to
6694 determine the address it must put in the global offset table, so
6695 both the dynamic object and the regular object will refer to the
6696 same memory location for the variable. */
6697
6698 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6699 to copy the initial value out of the dynamic object and into the
6700 runtime process image. We need to remember the offset into the
6701 .rela.bss section we are going to use. */
6702 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6703 {
6704 htab->relbss->size += sizeof (Elf64_External_Rela);
6705 h->needs_copy = 1;
6706 }
6707
6708 s = htab->dynbss;
6709
6710 return _bfd_elf_adjust_dynamic_copy (h, s);
6711 }
6712
6713 /* If given a function descriptor symbol, hide both the function code
6714 sym and the descriptor. */
6715 static void
6716 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6717 struct elf_link_hash_entry *h,
6718 bfd_boolean force_local)
6719 {
6720 struct ppc_link_hash_entry *eh;
6721 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6722
6723 eh = (struct ppc_link_hash_entry *) h;
6724 if (eh->is_func_descriptor)
6725 {
6726 struct ppc_link_hash_entry *fh = eh->oh;
6727
6728 if (fh == NULL)
6729 {
6730 const char *p, *q;
6731 struct ppc_link_hash_table *htab;
6732 char save;
6733
6734 /* We aren't supposed to use alloca in BFD because on
6735 systems which do not have alloca the version in libiberty
6736 calls xmalloc, which might cause the program to crash
6737 when it runs out of memory. This function doesn't have a
6738 return status, so there's no way to gracefully return an
6739 error. So cheat. We know that string[-1] can be safely
6740 accessed; It's either a string in an ELF string table,
6741 or allocated in an objalloc structure. */
6742
6743 p = eh->elf.root.root.string - 1;
6744 save = *p;
6745 *(char *) p = '.';
6746 htab = ppc_hash_table (info);
6747 if (htab == NULL)
6748 return;
6749
6750 fh = (struct ppc_link_hash_entry *)
6751 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6752 *(char *) p = save;
6753
6754 /* Unfortunately, if it so happens that the string we were
6755 looking for was allocated immediately before this string,
6756 then we overwrote the string terminator. That's the only
6757 reason the lookup should fail. */
6758 if (fh == NULL)
6759 {
6760 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6761 while (q >= eh->elf.root.root.string && *q == *p)
6762 --q, --p;
6763 if (q < eh->elf.root.root.string && *p == '.')
6764 fh = (struct ppc_link_hash_entry *)
6765 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6766 }
6767 if (fh != NULL)
6768 {
6769 eh->oh = fh;
6770 fh->oh = eh;
6771 }
6772 }
6773 if (fh != NULL)
6774 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6775 }
6776 }
6777
6778 static bfd_boolean
6779 get_sym_h (struct elf_link_hash_entry **hp,
6780 Elf_Internal_Sym **symp,
6781 asection **symsecp,
6782 unsigned char **tls_maskp,
6783 Elf_Internal_Sym **locsymsp,
6784 unsigned long r_symndx,
6785 bfd *ibfd)
6786 {
6787 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6788
6789 if (r_symndx >= symtab_hdr->sh_info)
6790 {
6791 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6792 struct elf_link_hash_entry *h;
6793
6794 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6795 h = elf_follow_link (h);
6796
6797 if (hp != NULL)
6798 *hp = h;
6799
6800 if (symp != NULL)
6801 *symp = NULL;
6802
6803 if (symsecp != NULL)
6804 {
6805 asection *symsec = NULL;
6806 if (h->root.type == bfd_link_hash_defined
6807 || h->root.type == bfd_link_hash_defweak)
6808 symsec = h->root.u.def.section;
6809 *symsecp = symsec;
6810 }
6811
6812 if (tls_maskp != NULL)
6813 {
6814 struct ppc_link_hash_entry *eh;
6815
6816 eh = (struct ppc_link_hash_entry *) h;
6817 *tls_maskp = &eh->tls_mask;
6818 }
6819 }
6820 else
6821 {
6822 Elf_Internal_Sym *sym;
6823 Elf_Internal_Sym *locsyms = *locsymsp;
6824
6825 if (locsyms == NULL)
6826 {
6827 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6828 if (locsyms == NULL)
6829 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6830 symtab_hdr->sh_info,
6831 0, NULL, NULL, NULL);
6832 if (locsyms == NULL)
6833 return FALSE;
6834 *locsymsp = locsyms;
6835 }
6836 sym = locsyms + r_symndx;
6837
6838 if (hp != NULL)
6839 *hp = NULL;
6840
6841 if (symp != NULL)
6842 *symp = sym;
6843
6844 if (symsecp != NULL)
6845 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6846
6847 if (tls_maskp != NULL)
6848 {
6849 struct got_entry **lgot_ents;
6850 unsigned char *tls_mask;
6851
6852 tls_mask = NULL;
6853 lgot_ents = elf_local_got_ents (ibfd);
6854 if (lgot_ents != NULL)
6855 {
6856 struct plt_entry **local_plt = (struct plt_entry **)
6857 (lgot_ents + symtab_hdr->sh_info);
6858 unsigned char *lgot_masks = (unsigned char *)
6859 (local_plt + symtab_hdr->sh_info);
6860 tls_mask = &lgot_masks[r_symndx];
6861 }
6862 *tls_maskp = tls_mask;
6863 }
6864 }
6865 return TRUE;
6866 }
6867
6868 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6869 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6870 type suitable for optimization, and 1 otherwise. */
6871
6872 static int
6873 get_tls_mask (unsigned char **tls_maskp,
6874 unsigned long *toc_symndx,
6875 bfd_vma *toc_addend,
6876 Elf_Internal_Sym **locsymsp,
6877 const Elf_Internal_Rela *rel,
6878 bfd *ibfd)
6879 {
6880 unsigned long r_symndx;
6881 int next_r;
6882 struct elf_link_hash_entry *h;
6883 Elf_Internal_Sym *sym;
6884 asection *sec;
6885 bfd_vma off;
6886
6887 r_symndx = ELF64_R_SYM (rel->r_info);
6888 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6889 return 0;
6890
6891 if ((*tls_maskp != NULL && **tls_maskp != 0)
6892 || sec == NULL
6893 || ppc64_elf_section_data (sec) == NULL
6894 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6895 return 1;
6896
6897 /* Look inside a TOC section too. */
6898 if (h != NULL)
6899 {
6900 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6901 off = h->root.u.def.value;
6902 }
6903 else
6904 off = sym->st_value;
6905 off += rel->r_addend;
6906 BFD_ASSERT (off % 8 == 0);
6907 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6908 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6909 if (toc_symndx != NULL)
6910 *toc_symndx = r_symndx;
6911 if (toc_addend != NULL)
6912 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6913 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6914 return 0;
6915 if ((h == NULL || is_static_defined (h))
6916 && (next_r == -1 || next_r == -2))
6917 return 1 - next_r;
6918 return 1;
6919 }
6920
6921 /* Find (or create) an entry in the tocsave hash table. */
6922
6923 static struct tocsave_entry *
6924 tocsave_find (struct ppc_link_hash_table *htab,
6925 enum insert_option insert,
6926 Elf_Internal_Sym **local_syms,
6927 const Elf_Internal_Rela *irela,
6928 bfd *ibfd)
6929 {
6930 unsigned long r_indx;
6931 struct elf_link_hash_entry *h;
6932 Elf_Internal_Sym *sym;
6933 struct tocsave_entry ent, *p;
6934 hashval_t hash;
6935 struct tocsave_entry **slot;
6936
6937 r_indx = ELF64_R_SYM (irela->r_info);
6938 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
6939 return NULL;
6940 if (ent.sec == NULL || ent.sec->output_section == NULL)
6941 {
6942 (*_bfd_error_handler)
6943 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
6944 return NULL;
6945 }
6946
6947 if (h != NULL)
6948 ent.offset = h->root.u.def.value;
6949 else
6950 ent.offset = sym->st_value;
6951 ent.offset += irela->r_addend;
6952
6953 hash = tocsave_htab_hash (&ent);
6954 slot = ((struct tocsave_entry **)
6955 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
6956 if (slot == NULL)
6957 return NULL;
6958
6959 if (*slot == NULL)
6960 {
6961 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
6962 if (p == NULL)
6963 return NULL;
6964 *p = ent;
6965 *slot = p;
6966 }
6967 return *slot;
6968 }
6969
6970 /* Adjust all global syms defined in opd sections. In gcc generated
6971 code for the old ABI, these will already have been done. */
6972
6973 static bfd_boolean
6974 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6975 {
6976 struct ppc_link_hash_entry *eh;
6977 asection *sym_sec;
6978 struct _opd_sec_data *opd;
6979
6980 if (h->root.type == bfd_link_hash_indirect)
6981 return TRUE;
6982
6983 if (h->root.type != bfd_link_hash_defined
6984 && h->root.type != bfd_link_hash_defweak)
6985 return TRUE;
6986
6987 eh = (struct ppc_link_hash_entry *) h;
6988 if (eh->adjust_done)
6989 return TRUE;
6990
6991 sym_sec = eh->elf.root.u.def.section;
6992 opd = get_opd_info (sym_sec);
6993 if (opd != NULL && opd->adjust != NULL)
6994 {
6995 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6996 if (adjust == -1)
6997 {
6998 /* This entry has been deleted. */
6999 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7000 if (dsec == NULL)
7001 {
7002 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7003 if (discarded_section (dsec))
7004 {
7005 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7006 break;
7007 }
7008 }
7009 eh->elf.root.u.def.value = 0;
7010 eh->elf.root.u.def.section = dsec;
7011 }
7012 else
7013 eh->elf.root.u.def.value += adjust;
7014 eh->adjust_done = 1;
7015 }
7016 return TRUE;
7017 }
7018
7019 /* Handles decrementing dynamic reloc counts for the reloc specified by
7020 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7021 have already been determined. */
7022
7023 static bfd_boolean
7024 dec_dynrel_count (bfd_vma r_info,
7025 asection *sec,
7026 struct bfd_link_info *info,
7027 Elf_Internal_Sym **local_syms,
7028 struct elf_link_hash_entry *h,
7029 Elf_Internal_Sym *sym)
7030 {
7031 enum elf_ppc64_reloc_type r_type;
7032 asection *sym_sec = NULL;
7033
7034 /* Can this reloc be dynamic? This switch, and later tests here
7035 should be kept in sync with the code in check_relocs. */
7036 r_type = ELF64_R_TYPE (r_info);
7037 switch (r_type)
7038 {
7039 default:
7040 return TRUE;
7041
7042 case R_PPC64_TPREL16:
7043 case R_PPC64_TPREL16_LO:
7044 case R_PPC64_TPREL16_HI:
7045 case R_PPC64_TPREL16_HA:
7046 case R_PPC64_TPREL16_DS:
7047 case R_PPC64_TPREL16_LO_DS:
7048 case R_PPC64_TPREL16_HIGHER:
7049 case R_PPC64_TPREL16_HIGHERA:
7050 case R_PPC64_TPREL16_HIGHEST:
7051 case R_PPC64_TPREL16_HIGHESTA:
7052 if (!info->shared)
7053 return TRUE;
7054
7055 case R_PPC64_TPREL64:
7056 case R_PPC64_DTPMOD64:
7057 case R_PPC64_DTPREL64:
7058 case R_PPC64_ADDR64:
7059 case R_PPC64_REL30:
7060 case R_PPC64_REL32:
7061 case R_PPC64_REL64:
7062 case R_PPC64_ADDR14:
7063 case R_PPC64_ADDR14_BRNTAKEN:
7064 case R_PPC64_ADDR14_BRTAKEN:
7065 case R_PPC64_ADDR16:
7066 case R_PPC64_ADDR16_DS:
7067 case R_PPC64_ADDR16_HA:
7068 case R_PPC64_ADDR16_HI:
7069 case R_PPC64_ADDR16_HIGHER:
7070 case R_PPC64_ADDR16_HIGHERA:
7071 case R_PPC64_ADDR16_HIGHEST:
7072 case R_PPC64_ADDR16_HIGHESTA:
7073 case R_PPC64_ADDR16_LO:
7074 case R_PPC64_ADDR16_LO_DS:
7075 case R_PPC64_ADDR24:
7076 case R_PPC64_ADDR32:
7077 case R_PPC64_UADDR16:
7078 case R_PPC64_UADDR32:
7079 case R_PPC64_UADDR64:
7080 case R_PPC64_TOC:
7081 break;
7082 }
7083
7084 if (local_syms != NULL)
7085 {
7086 unsigned long r_symndx;
7087 bfd *ibfd = sec->owner;
7088
7089 r_symndx = ELF64_R_SYM (r_info);
7090 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7091 return FALSE;
7092 }
7093
7094 if ((info->shared
7095 && (must_be_dyn_reloc (info, r_type)
7096 || (h != NULL
7097 && (!SYMBOLIC_BIND (info, h)
7098 || h->root.type == bfd_link_hash_defweak
7099 || !h->def_regular))))
7100 || (ELIMINATE_COPY_RELOCS
7101 && !info->shared
7102 && h != NULL
7103 && (h->root.type == bfd_link_hash_defweak
7104 || !h->def_regular)))
7105 ;
7106 else
7107 return TRUE;
7108
7109 if (h != NULL)
7110 {
7111 struct elf_dyn_relocs *p;
7112 struct elf_dyn_relocs **pp;
7113 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7114
7115 /* elf_gc_sweep may have already removed all dyn relocs associated
7116 with local syms for a given section. Also, symbol flags are
7117 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7118 report a dynreloc miscount. */
7119 if (*pp == NULL && info->gc_sections)
7120 return TRUE;
7121
7122 while ((p = *pp) != NULL)
7123 {
7124 if (p->sec == sec)
7125 {
7126 if (!must_be_dyn_reloc (info, r_type))
7127 p->pc_count -= 1;
7128 p->count -= 1;
7129 if (p->count == 0)
7130 *pp = p->next;
7131 return TRUE;
7132 }
7133 pp = &p->next;
7134 }
7135 }
7136 else
7137 {
7138 struct ppc_dyn_relocs *p;
7139 struct ppc_dyn_relocs **pp;
7140 void *vpp;
7141 bfd_boolean is_ifunc;
7142
7143 if (local_syms == NULL)
7144 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7145 if (sym_sec == NULL)
7146 sym_sec = sec;
7147
7148 vpp = &elf_section_data (sym_sec)->local_dynrel;
7149 pp = (struct ppc_dyn_relocs **) vpp;
7150
7151 if (*pp == NULL && info->gc_sections)
7152 return TRUE;
7153
7154 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7155 while ((p = *pp) != NULL)
7156 {
7157 if (p->sec == sec && p->ifunc == is_ifunc)
7158 {
7159 p->count -= 1;
7160 if (p->count == 0)
7161 *pp = p->next;
7162 return TRUE;
7163 }
7164 pp = &p->next;
7165 }
7166 }
7167
7168 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7169 sec->owner, sec);
7170 bfd_set_error (bfd_error_bad_value);
7171 return FALSE;
7172 }
7173
7174 /* Remove unused Official Procedure Descriptor entries. Currently we
7175 only remove those associated with functions in discarded link-once
7176 sections, or weakly defined functions that have been overridden. It
7177 would be possible to remove many more entries for statically linked
7178 applications. */
7179
7180 bfd_boolean
7181 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7182 {
7183 bfd *ibfd;
7184 bfd_boolean some_edited = FALSE;
7185 asection *need_pad = NULL;
7186
7187 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7188 {
7189 asection *sec;
7190 Elf_Internal_Rela *relstart, *rel, *relend;
7191 Elf_Internal_Shdr *symtab_hdr;
7192 Elf_Internal_Sym *local_syms;
7193 bfd_vma offset;
7194 struct _opd_sec_data *opd;
7195 bfd_boolean need_edit, add_aux_fields;
7196 bfd_size_type cnt_16b = 0;
7197
7198 if (!is_ppc64_elf (ibfd))
7199 continue;
7200
7201 sec = bfd_get_section_by_name (ibfd, ".opd");
7202 if (sec == NULL || sec->size == 0)
7203 continue;
7204
7205 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7206 continue;
7207
7208 if (sec->output_section == bfd_abs_section_ptr)
7209 continue;
7210
7211 /* Look through the section relocs. */
7212 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7213 continue;
7214
7215 local_syms = NULL;
7216 symtab_hdr = &elf_symtab_hdr (ibfd);
7217
7218 /* Read the relocations. */
7219 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7220 info->keep_memory);
7221 if (relstart == NULL)
7222 return FALSE;
7223
7224 /* First run through the relocs to check they are sane, and to
7225 determine whether we need to edit this opd section. */
7226 need_edit = FALSE;
7227 need_pad = sec;
7228 offset = 0;
7229 relend = relstart + sec->reloc_count;
7230 for (rel = relstart; rel < relend; )
7231 {
7232 enum elf_ppc64_reloc_type r_type;
7233 unsigned long r_symndx;
7234 asection *sym_sec;
7235 struct elf_link_hash_entry *h;
7236 Elf_Internal_Sym *sym;
7237
7238 /* .opd contains a regular array of 16 or 24 byte entries. We're
7239 only interested in the reloc pointing to a function entry
7240 point. */
7241 if (rel->r_offset != offset
7242 || rel + 1 >= relend
7243 || (rel + 1)->r_offset != offset + 8)
7244 {
7245 /* If someone messes with .opd alignment then after a
7246 "ld -r" we might have padding in the middle of .opd.
7247 Also, there's nothing to prevent someone putting
7248 something silly in .opd with the assembler. No .opd
7249 optimization for them! */
7250 broken_opd:
7251 (*_bfd_error_handler)
7252 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7253 need_edit = FALSE;
7254 break;
7255 }
7256
7257 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7258 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7259 {
7260 (*_bfd_error_handler)
7261 (_("%B: unexpected reloc type %u in .opd section"),
7262 ibfd, r_type);
7263 need_edit = FALSE;
7264 break;
7265 }
7266
7267 r_symndx = ELF64_R_SYM (rel->r_info);
7268 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7269 r_symndx, ibfd))
7270 goto error_ret;
7271
7272 if (sym_sec == NULL || sym_sec->owner == NULL)
7273 {
7274 const char *sym_name;
7275 if (h != NULL)
7276 sym_name = h->root.root.string;
7277 else
7278 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7279 sym_sec);
7280
7281 (*_bfd_error_handler)
7282 (_("%B: undefined sym `%s' in .opd section"),
7283 ibfd, sym_name);
7284 need_edit = FALSE;
7285 break;
7286 }
7287
7288 /* opd entries are always for functions defined in the
7289 current input bfd. If the symbol isn't defined in the
7290 input bfd, then we won't be using the function in this
7291 bfd; It must be defined in a linkonce section in another
7292 bfd, or is weak. It's also possible that we are
7293 discarding the function due to a linker script /DISCARD/,
7294 which we test for via the output_section. */
7295 if (sym_sec->owner != ibfd
7296 || sym_sec->output_section == bfd_abs_section_ptr)
7297 need_edit = TRUE;
7298
7299 rel += 2;
7300 if (rel == relend
7301 || (rel + 1 == relend && rel->r_offset == offset + 16))
7302 {
7303 if (sec->size == offset + 24)
7304 {
7305 need_pad = NULL;
7306 break;
7307 }
7308 if (rel == relend && sec->size == offset + 16)
7309 {
7310 cnt_16b++;
7311 break;
7312 }
7313 goto broken_opd;
7314 }
7315
7316 if (rel->r_offset == offset + 24)
7317 offset += 24;
7318 else if (rel->r_offset != offset + 16)
7319 goto broken_opd;
7320 else if (rel + 1 < relend
7321 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7322 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7323 {
7324 offset += 16;
7325 cnt_16b++;
7326 }
7327 else if (rel + 2 < relend
7328 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7329 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7330 {
7331 offset += 24;
7332 rel += 1;
7333 }
7334 else
7335 goto broken_opd;
7336 }
7337
7338 add_aux_fields = non_overlapping && cnt_16b > 0;
7339
7340 if (need_edit || add_aux_fields)
7341 {
7342 Elf_Internal_Rela *write_rel;
7343 Elf_Internal_Shdr *rel_hdr;
7344 bfd_byte *rptr, *wptr;
7345 bfd_byte *new_contents;
7346 bfd_boolean skip;
7347 long opd_ent_size;
7348 bfd_size_type amt;
7349
7350 new_contents = NULL;
7351 amt = sec->size * sizeof (long) / 8;
7352 opd = &ppc64_elf_section_data (sec)->u.opd;
7353 opd->adjust = bfd_zalloc (sec->owner, amt);
7354 if (opd->adjust == NULL)
7355 return FALSE;
7356 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7357
7358 /* This seems a waste of time as input .opd sections are all
7359 zeros as generated by gcc, but I suppose there's no reason
7360 this will always be so. We might start putting something in
7361 the third word of .opd entries. */
7362 if ((sec->flags & SEC_IN_MEMORY) == 0)
7363 {
7364 bfd_byte *loc;
7365 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7366 {
7367 if (loc != NULL)
7368 free (loc);
7369 error_ret:
7370 if (local_syms != NULL
7371 && symtab_hdr->contents != (unsigned char *) local_syms)
7372 free (local_syms);
7373 if (elf_section_data (sec)->relocs != relstart)
7374 free (relstart);
7375 return FALSE;
7376 }
7377 sec->contents = loc;
7378 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7379 }
7380
7381 elf_section_data (sec)->relocs = relstart;
7382
7383 new_contents = sec->contents;
7384 if (add_aux_fields)
7385 {
7386 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7387 if (new_contents == NULL)
7388 return FALSE;
7389 need_pad = FALSE;
7390 }
7391 wptr = new_contents;
7392 rptr = sec->contents;
7393
7394 write_rel = relstart;
7395 skip = FALSE;
7396 offset = 0;
7397 opd_ent_size = 0;
7398 for (rel = relstart; rel < relend; rel++)
7399 {
7400 unsigned long r_symndx;
7401 asection *sym_sec;
7402 struct elf_link_hash_entry *h;
7403 Elf_Internal_Sym *sym;
7404
7405 r_symndx = ELF64_R_SYM (rel->r_info);
7406 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7407 r_symndx, ibfd))
7408 goto error_ret;
7409
7410 if (rel->r_offset == offset)
7411 {
7412 struct ppc_link_hash_entry *fdh = NULL;
7413
7414 /* See if the .opd entry is full 24 byte or
7415 16 byte (with fd_aux entry overlapped with next
7416 fd_func). */
7417 opd_ent_size = 24;
7418 if ((rel + 2 == relend && sec->size == offset + 16)
7419 || (rel + 3 < relend
7420 && rel[2].r_offset == offset + 16
7421 && rel[3].r_offset == offset + 24
7422 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7423 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7424 opd_ent_size = 16;
7425
7426 if (h != NULL
7427 && h->root.root.string[0] == '.')
7428 {
7429 struct ppc_link_hash_table *htab;
7430
7431 htab = ppc_hash_table (info);
7432 if (htab != NULL)
7433 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7434 htab);
7435 if (fdh != NULL
7436 && fdh->elf.root.type != bfd_link_hash_defined
7437 && fdh->elf.root.type != bfd_link_hash_defweak)
7438 fdh = NULL;
7439 }
7440
7441 skip = (sym_sec->owner != ibfd
7442 || sym_sec->output_section == bfd_abs_section_ptr);
7443 if (skip)
7444 {
7445 if (fdh != NULL && sym_sec->owner == ibfd)
7446 {
7447 /* Arrange for the function descriptor sym
7448 to be dropped. */
7449 fdh->elf.root.u.def.value = 0;
7450 fdh->elf.root.u.def.section = sym_sec;
7451 }
7452 opd->adjust[rel->r_offset / 8] = -1;
7453 }
7454 else
7455 {
7456 /* We'll be keeping this opd entry. */
7457
7458 if (fdh != NULL)
7459 {
7460 /* Redefine the function descriptor symbol to
7461 this location in the opd section. It is
7462 necessary to update the value here rather
7463 than using an array of adjustments as we do
7464 for local symbols, because various places
7465 in the generic ELF code use the value
7466 stored in u.def.value. */
7467 fdh->elf.root.u.def.value = wptr - new_contents;
7468 fdh->adjust_done = 1;
7469 }
7470
7471 /* Local syms are a bit tricky. We could
7472 tweak them as they can be cached, but
7473 we'd need to look through the local syms
7474 for the function descriptor sym which we
7475 don't have at the moment. So keep an
7476 array of adjustments. */
7477 opd->adjust[rel->r_offset / 8]
7478 = (wptr - new_contents) - (rptr - sec->contents);
7479
7480 if (wptr != rptr)
7481 memcpy (wptr, rptr, opd_ent_size);
7482 wptr += opd_ent_size;
7483 if (add_aux_fields && opd_ent_size == 16)
7484 {
7485 memset (wptr, '\0', 8);
7486 wptr += 8;
7487 }
7488 }
7489 rptr += opd_ent_size;
7490 offset += opd_ent_size;
7491 }
7492
7493 if (skip)
7494 {
7495 if (!NO_OPD_RELOCS
7496 && !info->relocatable
7497 && !dec_dynrel_count (rel->r_info, sec, info,
7498 NULL, h, sym))
7499 goto error_ret;
7500 }
7501 else
7502 {
7503 /* We need to adjust any reloc offsets to point to the
7504 new opd entries. While we're at it, we may as well
7505 remove redundant relocs. */
7506 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7507 if (write_rel != rel)
7508 memcpy (write_rel, rel, sizeof (*rel));
7509 ++write_rel;
7510 }
7511 }
7512
7513 sec->size = wptr - new_contents;
7514 sec->reloc_count = write_rel - relstart;
7515 if (add_aux_fields)
7516 {
7517 free (sec->contents);
7518 sec->contents = new_contents;
7519 }
7520
7521 /* Fudge the header size too, as this is used later in
7522 elf_bfd_final_link if we are emitting relocs. */
7523 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7524 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7525 some_edited = TRUE;
7526 }
7527 else if (elf_section_data (sec)->relocs != relstart)
7528 free (relstart);
7529
7530 if (local_syms != NULL
7531 && symtab_hdr->contents != (unsigned char *) local_syms)
7532 {
7533 if (!info->keep_memory)
7534 free (local_syms);
7535 else
7536 symtab_hdr->contents = (unsigned char *) local_syms;
7537 }
7538 }
7539
7540 if (some_edited)
7541 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7542
7543 /* If we are doing a final link and the last .opd entry is just 16 byte
7544 long, add a 8 byte padding after it. */
7545 if (need_pad != NULL && !info->relocatable)
7546 {
7547 bfd_byte *p;
7548
7549 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7550 {
7551 BFD_ASSERT (need_pad->size > 0);
7552
7553 p = bfd_malloc (need_pad->size + 8);
7554 if (p == NULL)
7555 return FALSE;
7556
7557 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7558 p, 0, need_pad->size))
7559 return FALSE;
7560
7561 need_pad->contents = p;
7562 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7563 }
7564 else
7565 {
7566 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7567 if (p == NULL)
7568 return FALSE;
7569
7570 need_pad->contents = p;
7571 }
7572
7573 memset (need_pad->contents + need_pad->size, 0, 8);
7574 need_pad->size += 8;
7575 }
7576
7577 return TRUE;
7578 }
7579
7580 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7581
7582 asection *
7583 ppc64_elf_tls_setup (struct bfd_link_info *info,
7584 int no_tls_get_addr_opt,
7585 int *no_multi_toc)
7586 {
7587 struct ppc_link_hash_table *htab;
7588
7589 htab = ppc_hash_table (info);
7590 if (htab == NULL)
7591 return NULL;
7592
7593 if (*no_multi_toc)
7594 htab->do_multi_toc = 0;
7595 else if (!htab->do_multi_toc)
7596 *no_multi_toc = 1;
7597
7598 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7599 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7600 FALSE, FALSE, TRUE));
7601 /* Move dynamic linking info to the function descriptor sym. */
7602 if (htab->tls_get_addr != NULL)
7603 func_desc_adjust (&htab->tls_get_addr->elf, info);
7604 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7605 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7606 FALSE, FALSE, TRUE));
7607 if (!no_tls_get_addr_opt)
7608 {
7609 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7610
7611 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7612 FALSE, FALSE, TRUE);
7613 if (opt != NULL)
7614 func_desc_adjust (opt, info);
7615 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7616 FALSE, FALSE, TRUE);
7617 if (opt_fd != NULL
7618 && (opt_fd->root.type == bfd_link_hash_defined
7619 || opt_fd->root.type == bfd_link_hash_defweak))
7620 {
7621 /* If glibc supports an optimized __tls_get_addr call stub,
7622 signalled by the presence of __tls_get_addr_opt, and we'll
7623 be calling __tls_get_addr via a plt call stub, then
7624 make __tls_get_addr point to __tls_get_addr_opt. */
7625 tga_fd = &htab->tls_get_addr_fd->elf;
7626 if (htab->elf.dynamic_sections_created
7627 && tga_fd != NULL
7628 && (tga_fd->type == STT_FUNC
7629 || tga_fd->needs_plt)
7630 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7631 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7632 && tga_fd->root.type == bfd_link_hash_undefweak)))
7633 {
7634 struct plt_entry *ent;
7635
7636 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7637 if (ent->plt.refcount > 0)
7638 break;
7639 if (ent != NULL)
7640 {
7641 tga_fd->root.type = bfd_link_hash_indirect;
7642 tga_fd->root.u.i.link = &opt_fd->root;
7643 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7644 if (opt_fd->dynindx != -1)
7645 {
7646 /* Use __tls_get_addr_opt in dynamic relocations. */
7647 opt_fd->dynindx = -1;
7648 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7649 opt_fd->dynstr_index);
7650 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7651 return NULL;
7652 }
7653 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7654 tga = &htab->tls_get_addr->elf;
7655 if (opt != NULL && tga != NULL)
7656 {
7657 tga->root.type = bfd_link_hash_indirect;
7658 tga->root.u.i.link = &opt->root;
7659 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7660 _bfd_elf_link_hash_hide_symbol (info, opt,
7661 tga->forced_local);
7662 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7663 }
7664 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7665 htab->tls_get_addr_fd->is_func_descriptor = 1;
7666 if (htab->tls_get_addr != NULL)
7667 {
7668 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7669 htab->tls_get_addr->is_func = 1;
7670 }
7671 }
7672 }
7673 }
7674 else
7675 no_tls_get_addr_opt = TRUE;
7676 }
7677 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7678 return _bfd_elf_tls_setup (info->output_bfd, info);
7679 }
7680
7681 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7682 HASH1 or HASH2. */
7683
7684 static bfd_boolean
7685 branch_reloc_hash_match (const bfd *ibfd,
7686 const Elf_Internal_Rela *rel,
7687 const struct ppc_link_hash_entry *hash1,
7688 const struct ppc_link_hash_entry *hash2)
7689 {
7690 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7691 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7692 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7693
7694 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7695 {
7696 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7697 struct elf_link_hash_entry *h;
7698
7699 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7700 h = elf_follow_link (h);
7701 if (h == &hash1->elf || h == &hash2->elf)
7702 return TRUE;
7703 }
7704 return FALSE;
7705 }
7706
7707 /* Run through all the TLS relocs looking for optimization
7708 opportunities. The linker has been hacked (see ppc64elf.em) to do
7709 a preliminary section layout so that we know the TLS segment
7710 offsets. We can't optimize earlier because some optimizations need
7711 to know the tp offset, and we need to optimize before allocating
7712 dynamic relocations. */
7713
7714 bfd_boolean
7715 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7716 {
7717 bfd *ibfd;
7718 asection *sec;
7719 struct ppc_link_hash_table *htab;
7720 unsigned char *toc_ref;
7721 int pass;
7722
7723 if (info->relocatable || !info->executable)
7724 return TRUE;
7725
7726 htab = ppc_hash_table (info);
7727 if (htab == NULL)
7728 return FALSE;
7729
7730 /* Make two passes over the relocs. On the first pass, mark toc
7731 entries involved with tls relocs, and check that tls relocs
7732 involved in setting up a tls_get_addr call are indeed followed by
7733 such a call. If they are not, we can't do any tls optimization.
7734 On the second pass twiddle tls_mask flags to notify
7735 relocate_section that optimization can be done, and adjust got
7736 and plt refcounts. */
7737 toc_ref = NULL;
7738 for (pass = 0; pass < 2; ++pass)
7739 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7740 {
7741 Elf_Internal_Sym *locsyms = NULL;
7742 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7743
7744 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7745 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7746 {
7747 Elf_Internal_Rela *relstart, *rel, *relend;
7748 bfd_boolean found_tls_get_addr_arg = 0;
7749
7750 /* Read the relocations. */
7751 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7752 info->keep_memory);
7753 if (relstart == NULL)
7754 return FALSE;
7755
7756 relend = relstart + sec->reloc_count;
7757 for (rel = relstart; rel < relend; rel++)
7758 {
7759 enum elf_ppc64_reloc_type r_type;
7760 unsigned long r_symndx;
7761 struct elf_link_hash_entry *h;
7762 Elf_Internal_Sym *sym;
7763 asection *sym_sec;
7764 unsigned char *tls_mask;
7765 unsigned char tls_set, tls_clear, tls_type = 0;
7766 bfd_vma value;
7767 bfd_boolean ok_tprel, is_local;
7768 long toc_ref_index = 0;
7769 int expecting_tls_get_addr = 0;
7770 bfd_boolean ret = FALSE;
7771
7772 r_symndx = ELF64_R_SYM (rel->r_info);
7773 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7774 r_symndx, ibfd))
7775 {
7776 err_free_rel:
7777 if (elf_section_data (sec)->relocs != relstart)
7778 free (relstart);
7779 if (toc_ref != NULL)
7780 free (toc_ref);
7781 if (locsyms != NULL
7782 && (elf_symtab_hdr (ibfd).contents
7783 != (unsigned char *) locsyms))
7784 free (locsyms);
7785 return ret;
7786 }
7787
7788 if (h != NULL)
7789 {
7790 if (h->root.type == bfd_link_hash_defined
7791 || h->root.type == bfd_link_hash_defweak)
7792 value = h->root.u.def.value;
7793 else if (h->root.type == bfd_link_hash_undefweak)
7794 value = 0;
7795 else
7796 {
7797 found_tls_get_addr_arg = 0;
7798 continue;
7799 }
7800 }
7801 else
7802 /* Symbols referenced by TLS relocs must be of type
7803 STT_TLS. So no need for .opd local sym adjust. */
7804 value = sym->st_value;
7805
7806 ok_tprel = FALSE;
7807 is_local = FALSE;
7808 if (h == NULL
7809 || !h->def_dynamic)
7810 {
7811 is_local = TRUE;
7812 if (h != NULL
7813 && h->root.type == bfd_link_hash_undefweak)
7814 ok_tprel = TRUE;
7815 else
7816 {
7817 value += sym_sec->output_offset;
7818 value += sym_sec->output_section->vma;
7819 value -= htab->elf.tls_sec->vma;
7820 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7821 < (bfd_vma) 1 << 32);
7822 }
7823 }
7824
7825 r_type = ELF64_R_TYPE (rel->r_info);
7826 /* If this section has old-style __tls_get_addr calls
7827 without marker relocs, then check that each
7828 __tls_get_addr call reloc is preceded by a reloc
7829 that conceivably belongs to the __tls_get_addr arg
7830 setup insn. If we don't find matching arg setup
7831 relocs, don't do any tls optimization. */
7832 if (pass == 0
7833 && sec->has_tls_get_addr_call
7834 && h != NULL
7835 && (h == &htab->tls_get_addr->elf
7836 || h == &htab->tls_get_addr_fd->elf)
7837 && !found_tls_get_addr_arg
7838 && is_branch_reloc (r_type))
7839 {
7840 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7841 "TLS optimization disabled\n"),
7842 ibfd, sec, rel->r_offset);
7843 ret = TRUE;
7844 goto err_free_rel;
7845 }
7846
7847 found_tls_get_addr_arg = 0;
7848 switch (r_type)
7849 {
7850 case R_PPC64_GOT_TLSLD16:
7851 case R_PPC64_GOT_TLSLD16_LO:
7852 expecting_tls_get_addr = 1;
7853 found_tls_get_addr_arg = 1;
7854 /* Fall thru */
7855
7856 case R_PPC64_GOT_TLSLD16_HI:
7857 case R_PPC64_GOT_TLSLD16_HA:
7858 /* These relocs should never be against a symbol
7859 defined in a shared lib. Leave them alone if
7860 that turns out to be the case. */
7861 if (!is_local)
7862 continue;
7863
7864 /* LD -> LE */
7865 tls_set = 0;
7866 tls_clear = TLS_LD;
7867 tls_type = TLS_TLS | TLS_LD;
7868 break;
7869
7870 case R_PPC64_GOT_TLSGD16:
7871 case R_PPC64_GOT_TLSGD16_LO:
7872 expecting_tls_get_addr = 1;
7873 found_tls_get_addr_arg = 1;
7874 /* Fall thru */
7875
7876 case R_PPC64_GOT_TLSGD16_HI:
7877 case R_PPC64_GOT_TLSGD16_HA:
7878 if (ok_tprel)
7879 /* GD -> LE */
7880 tls_set = 0;
7881 else
7882 /* GD -> IE */
7883 tls_set = TLS_TLS | TLS_TPRELGD;
7884 tls_clear = TLS_GD;
7885 tls_type = TLS_TLS | TLS_GD;
7886 break;
7887
7888 case R_PPC64_GOT_TPREL16_DS:
7889 case R_PPC64_GOT_TPREL16_LO_DS:
7890 case R_PPC64_GOT_TPREL16_HI:
7891 case R_PPC64_GOT_TPREL16_HA:
7892 if (ok_tprel)
7893 {
7894 /* IE -> LE */
7895 tls_set = 0;
7896 tls_clear = TLS_TPREL;
7897 tls_type = TLS_TLS | TLS_TPREL;
7898 break;
7899 }
7900 continue;
7901
7902 case R_PPC64_TLSGD:
7903 case R_PPC64_TLSLD:
7904 found_tls_get_addr_arg = 1;
7905 /* Fall thru */
7906
7907 case R_PPC64_TLS:
7908 case R_PPC64_TOC16:
7909 case R_PPC64_TOC16_LO:
7910 if (sym_sec == NULL || sym_sec != toc)
7911 continue;
7912
7913 /* Mark this toc entry as referenced by a TLS
7914 code sequence. We can do that now in the
7915 case of R_PPC64_TLS, and after checking for
7916 tls_get_addr for the TOC16 relocs. */
7917 if (toc_ref == NULL)
7918 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7919 if (toc_ref == NULL)
7920 goto err_free_rel;
7921
7922 if (h != NULL)
7923 value = h->root.u.def.value;
7924 else
7925 value = sym->st_value;
7926 value += rel->r_addend;
7927 BFD_ASSERT (value < toc->size && value % 8 == 0);
7928 toc_ref_index = (value + toc->output_offset) / 8;
7929 if (r_type == R_PPC64_TLS
7930 || r_type == R_PPC64_TLSGD
7931 || r_type == R_PPC64_TLSLD)
7932 {
7933 toc_ref[toc_ref_index] = 1;
7934 continue;
7935 }
7936
7937 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7938 continue;
7939
7940 tls_set = 0;
7941 tls_clear = 0;
7942 expecting_tls_get_addr = 2;
7943 break;
7944
7945 case R_PPC64_TPREL64:
7946 if (pass == 0
7947 || sec != toc
7948 || toc_ref == NULL
7949 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7950 continue;
7951 if (ok_tprel)
7952 {
7953 /* IE -> LE */
7954 tls_set = TLS_EXPLICIT;
7955 tls_clear = TLS_TPREL;
7956 break;
7957 }
7958 continue;
7959
7960 case R_PPC64_DTPMOD64:
7961 if (pass == 0
7962 || sec != toc
7963 || toc_ref == NULL
7964 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7965 continue;
7966 if (rel + 1 < relend
7967 && (rel[1].r_info
7968 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7969 && rel[1].r_offset == rel->r_offset + 8)
7970 {
7971 if (ok_tprel)
7972 /* GD -> LE */
7973 tls_set = TLS_EXPLICIT | TLS_GD;
7974 else
7975 /* GD -> IE */
7976 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7977 tls_clear = TLS_GD;
7978 }
7979 else
7980 {
7981 if (!is_local)
7982 continue;
7983
7984 /* LD -> LE */
7985 tls_set = TLS_EXPLICIT;
7986 tls_clear = TLS_LD;
7987 }
7988 break;
7989
7990 default:
7991 continue;
7992 }
7993
7994 if (pass == 0)
7995 {
7996 if (!expecting_tls_get_addr
7997 || !sec->has_tls_get_addr_call)
7998 continue;
7999
8000 if (rel + 1 < relend
8001 && branch_reloc_hash_match (ibfd, rel + 1,
8002 htab->tls_get_addr,
8003 htab->tls_get_addr_fd))
8004 {
8005 if (expecting_tls_get_addr == 2)
8006 {
8007 /* Check for toc tls entries. */
8008 unsigned char *toc_tls;
8009 int retval;
8010
8011 retval = get_tls_mask (&toc_tls, NULL, NULL,
8012 &locsyms,
8013 rel, ibfd);
8014 if (retval == 0)
8015 goto err_free_rel;
8016 if (toc_tls != NULL)
8017 {
8018 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8019 found_tls_get_addr_arg = 1;
8020 if (retval > 1)
8021 toc_ref[toc_ref_index] = 1;
8022 }
8023 }
8024 continue;
8025 }
8026
8027 if (expecting_tls_get_addr != 1)
8028 continue;
8029
8030 /* Uh oh, we didn't find the expected call. We
8031 could just mark this symbol to exclude it
8032 from tls optimization but it's safer to skip
8033 the entire optimization. */
8034 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8035 "TLS optimization disabled\n"),
8036 ibfd, sec, rel->r_offset);
8037 ret = TRUE;
8038 goto err_free_rel;
8039 }
8040
8041 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8042 {
8043 struct plt_entry *ent;
8044 for (ent = htab->tls_get_addr->elf.plt.plist;
8045 ent != NULL;
8046 ent = ent->next)
8047 if (ent->addend == 0)
8048 {
8049 if (ent->plt.refcount > 0)
8050 {
8051 ent->plt.refcount -= 1;
8052 expecting_tls_get_addr = 0;
8053 }
8054 break;
8055 }
8056 }
8057
8058 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8059 {
8060 struct plt_entry *ent;
8061 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8062 ent != NULL;
8063 ent = ent->next)
8064 if (ent->addend == 0)
8065 {
8066 if (ent->plt.refcount > 0)
8067 ent->plt.refcount -= 1;
8068 break;
8069 }
8070 }
8071
8072 if (tls_clear == 0)
8073 continue;
8074
8075 if ((tls_set & TLS_EXPLICIT) == 0)
8076 {
8077 struct got_entry *ent;
8078
8079 /* Adjust got entry for this reloc. */
8080 if (h != NULL)
8081 ent = h->got.glist;
8082 else
8083 ent = elf_local_got_ents (ibfd)[r_symndx];
8084
8085 for (; ent != NULL; ent = ent->next)
8086 if (ent->addend == rel->r_addend
8087 && ent->owner == ibfd
8088 && ent->tls_type == tls_type)
8089 break;
8090 if (ent == NULL)
8091 abort ();
8092
8093 if (tls_set == 0)
8094 {
8095 /* We managed to get rid of a got entry. */
8096 if (ent->got.refcount > 0)
8097 ent->got.refcount -= 1;
8098 }
8099 }
8100 else
8101 {
8102 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8103 we'll lose one or two dyn relocs. */
8104 if (!dec_dynrel_count (rel->r_info, sec, info,
8105 NULL, h, sym))
8106 return FALSE;
8107
8108 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8109 {
8110 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8111 NULL, h, sym))
8112 return FALSE;
8113 }
8114 }
8115
8116 *tls_mask |= tls_set;
8117 *tls_mask &= ~tls_clear;
8118 }
8119
8120 if (elf_section_data (sec)->relocs != relstart)
8121 free (relstart);
8122 }
8123
8124 if (locsyms != NULL
8125 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8126 {
8127 if (!info->keep_memory)
8128 free (locsyms);
8129 else
8130 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8131 }
8132 }
8133
8134 if (toc_ref != NULL)
8135 free (toc_ref);
8136 return TRUE;
8137 }
8138
8139 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8140 the values of any global symbols in a toc section that has been
8141 edited. Globals in toc sections should be a rarity, so this function
8142 sets a flag if any are found in toc sections other than the one just
8143 edited, so that futher hash table traversals can be avoided. */
8144
8145 struct adjust_toc_info
8146 {
8147 asection *toc;
8148 unsigned long *skip;
8149 bfd_boolean global_toc_syms;
8150 };
8151
8152 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8153
8154 static bfd_boolean
8155 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8156 {
8157 struct ppc_link_hash_entry *eh;
8158 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8159 unsigned long i;
8160
8161 if (h->root.type != bfd_link_hash_defined
8162 && h->root.type != bfd_link_hash_defweak)
8163 return TRUE;
8164
8165 eh = (struct ppc_link_hash_entry *) h;
8166 if (eh->adjust_done)
8167 return TRUE;
8168
8169 if (eh->elf.root.u.def.section == toc_inf->toc)
8170 {
8171 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8172 i = toc_inf->toc->rawsize >> 3;
8173 else
8174 i = eh->elf.root.u.def.value >> 3;
8175
8176 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8177 {
8178 (*_bfd_error_handler)
8179 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8180 do
8181 ++i;
8182 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8183 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8184 }
8185
8186 eh->elf.root.u.def.value -= toc_inf->skip[i];
8187 eh->adjust_done = 1;
8188 }
8189 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8190 toc_inf->global_toc_syms = TRUE;
8191
8192 return TRUE;
8193 }
8194
8195 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8196
8197 static bfd_boolean
8198 ok_lo_toc_insn (unsigned int insn)
8199 {
8200 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8201 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8202 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8203 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8204 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8205 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8206 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8207 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8208 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8209 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8210 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8211 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8212 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8213 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8214 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8215 && (insn & 3) != 1)
8216 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8217 && ((insn & 3) == 0 || (insn & 3) == 3))
8218 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8219 }
8220
8221 /* Examine all relocs referencing .toc sections in order to remove
8222 unused .toc entries. */
8223
8224 bfd_boolean
8225 ppc64_elf_edit_toc (struct bfd_link_info *info)
8226 {
8227 bfd *ibfd;
8228 struct adjust_toc_info toc_inf;
8229 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8230
8231 htab->do_toc_opt = 1;
8232 toc_inf.global_toc_syms = TRUE;
8233 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8234 {
8235 asection *toc, *sec;
8236 Elf_Internal_Shdr *symtab_hdr;
8237 Elf_Internal_Sym *local_syms;
8238 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8239 unsigned long *skip, *drop;
8240 unsigned char *used;
8241 unsigned char *keep, last, some_unused;
8242
8243 if (!is_ppc64_elf (ibfd))
8244 continue;
8245
8246 toc = bfd_get_section_by_name (ibfd, ".toc");
8247 if (toc == NULL
8248 || toc->size == 0
8249 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8250 || discarded_section (toc))
8251 continue;
8252
8253 toc_relocs = NULL;
8254 local_syms = NULL;
8255 symtab_hdr = &elf_symtab_hdr (ibfd);
8256
8257 /* Look at sections dropped from the final link. */
8258 skip = NULL;
8259 relstart = NULL;
8260 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8261 {
8262 if (sec->reloc_count == 0
8263 || !discarded_section (sec)
8264 || get_opd_info (sec)
8265 || (sec->flags & SEC_ALLOC) == 0
8266 || (sec->flags & SEC_DEBUGGING) != 0)
8267 continue;
8268
8269 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8270 if (relstart == NULL)
8271 goto error_ret;
8272
8273 /* Run through the relocs to see which toc entries might be
8274 unused. */
8275 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8276 {
8277 enum elf_ppc64_reloc_type r_type;
8278 unsigned long r_symndx;
8279 asection *sym_sec;
8280 struct elf_link_hash_entry *h;
8281 Elf_Internal_Sym *sym;
8282 bfd_vma val;
8283
8284 r_type = ELF64_R_TYPE (rel->r_info);
8285 switch (r_type)
8286 {
8287 default:
8288 continue;
8289
8290 case R_PPC64_TOC16:
8291 case R_PPC64_TOC16_LO:
8292 case R_PPC64_TOC16_HI:
8293 case R_PPC64_TOC16_HA:
8294 case R_PPC64_TOC16_DS:
8295 case R_PPC64_TOC16_LO_DS:
8296 break;
8297 }
8298
8299 r_symndx = ELF64_R_SYM (rel->r_info);
8300 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8301 r_symndx, ibfd))
8302 goto error_ret;
8303
8304 if (sym_sec != toc)
8305 continue;
8306
8307 if (h != NULL)
8308 val = h->root.u.def.value;
8309 else
8310 val = sym->st_value;
8311 val += rel->r_addend;
8312
8313 if (val >= toc->size)
8314 continue;
8315
8316 /* Anything in the toc ought to be aligned to 8 bytes.
8317 If not, don't mark as unused. */
8318 if (val & 7)
8319 continue;
8320
8321 if (skip == NULL)
8322 {
8323 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8324 if (skip == NULL)
8325 goto error_ret;
8326 }
8327
8328 skip[val >> 3] = ref_from_discarded;
8329 }
8330
8331 if (elf_section_data (sec)->relocs != relstart)
8332 free (relstart);
8333 }
8334
8335 /* For largetoc loads of address constants, we can convert
8336 . addis rx,2,addr@got@ha
8337 . ld ry,addr@got@l(rx)
8338 to
8339 . addis rx,2,addr@toc@ha
8340 . addi ry,rx,addr@toc@l
8341 when addr is within 2G of the toc pointer. This then means
8342 that the word storing "addr" in the toc is no longer needed. */
8343
8344 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8345 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8346 && toc->reloc_count != 0)
8347 {
8348 /* Read toc relocs. */
8349 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8350 info->keep_memory);
8351 if (toc_relocs == NULL)
8352 goto error_ret;
8353
8354 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8355 {
8356 enum elf_ppc64_reloc_type r_type;
8357 unsigned long r_symndx;
8358 asection *sym_sec;
8359 struct elf_link_hash_entry *h;
8360 Elf_Internal_Sym *sym;
8361 bfd_vma val, addr;
8362
8363 r_type = ELF64_R_TYPE (rel->r_info);
8364 if (r_type != R_PPC64_ADDR64)
8365 continue;
8366
8367 r_symndx = ELF64_R_SYM (rel->r_info);
8368 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8369 r_symndx, ibfd))
8370 goto error_ret;
8371
8372 if (sym_sec == NULL
8373 || discarded_section (sym_sec))
8374 continue;
8375
8376 if (!SYMBOL_CALLS_LOCAL (info, h))
8377 continue;
8378
8379 if (h != NULL)
8380 {
8381 if (h->type == STT_GNU_IFUNC)
8382 continue;
8383 val = h->root.u.def.value;
8384 }
8385 else
8386 {
8387 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8388 continue;
8389 val = sym->st_value;
8390 }
8391 val += rel->r_addend;
8392 val += sym_sec->output_section->vma + sym_sec->output_offset;
8393
8394 /* We don't yet know the exact toc pointer value, but we
8395 know it will be somewhere in the toc section. Don't
8396 optimize if the difference from any possible toc
8397 pointer is outside [ff..f80008000, 7fff7fff]. */
8398 addr = toc->output_section->vma + TOC_BASE_OFF;
8399 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8400 continue;
8401
8402 addr = toc->output_section->vma + toc->output_section->rawsize;
8403 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8404 continue;
8405
8406 if (skip == NULL)
8407 {
8408 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8409 if (skip == NULL)
8410 goto error_ret;
8411 }
8412
8413 skip[rel->r_offset >> 3]
8414 |= can_optimize | ((rel - toc_relocs) << 2);
8415 }
8416 }
8417
8418 if (skip == NULL)
8419 continue;
8420
8421 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8422 if (used == NULL)
8423 {
8424 error_ret:
8425 if (local_syms != NULL
8426 && symtab_hdr->contents != (unsigned char *) local_syms)
8427 free (local_syms);
8428 if (sec != NULL
8429 && relstart != NULL
8430 && elf_section_data (sec)->relocs != relstart)
8431 free (relstart);
8432 if (toc_relocs != NULL
8433 && elf_section_data (toc)->relocs != toc_relocs)
8434 free (toc_relocs);
8435 if (skip != NULL)
8436 free (skip);
8437 return FALSE;
8438 }
8439
8440 /* Now check all kept sections that might reference the toc.
8441 Check the toc itself last. */
8442 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8443 : ibfd->sections);
8444 sec != NULL;
8445 sec = (sec == toc ? NULL
8446 : sec->next == NULL ? toc
8447 : sec->next == toc && toc->next ? toc->next
8448 : sec->next))
8449 {
8450 int repeat;
8451
8452 if (sec->reloc_count == 0
8453 || discarded_section (sec)
8454 || get_opd_info (sec)
8455 || (sec->flags & SEC_ALLOC) == 0
8456 || (sec->flags & SEC_DEBUGGING) != 0)
8457 continue;
8458
8459 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8460 info->keep_memory);
8461 if (relstart == NULL)
8462 goto error_ret;
8463
8464 /* Mark toc entries referenced as used. */
8465 do
8466 {
8467 repeat = 0;
8468 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8469 {
8470 enum elf_ppc64_reloc_type r_type;
8471 unsigned long r_symndx;
8472 asection *sym_sec;
8473 struct elf_link_hash_entry *h;
8474 Elf_Internal_Sym *sym;
8475 bfd_vma val;
8476 enum {no_check, check_lo, check_ha} insn_check;
8477
8478 r_type = ELF64_R_TYPE (rel->r_info);
8479 switch (r_type)
8480 {
8481 default:
8482 insn_check = no_check;
8483 break;
8484
8485 case R_PPC64_GOT_TLSLD16_HA:
8486 case R_PPC64_GOT_TLSGD16_HA:
8487 case R_PPC64_GOT_TPREL16_HA:
8488 case R_PPC64_GOT_DTPREL16_HA:
8489 case R_PPC64_GOT16_HA:
8490 case R_PPC64_TOC16_HA:
8491 insn_check = check_ha;
8492 break;
8493
8494 case R_PPC64_GOT_TLSLD16_LO:
8495 case R_PPC64_GOT_TLSGD16_LO:
8496 case R_PPC64_GOT_TPREL16_LO_DS:
8497 case R_PPC64_GOT_DTPREL16_LO_DS:
8498 case R_PPC64_GOT16_LO:
8499 case R_PPC64_GOT16_LO_DS:
8500 case R_PPC64_TOC16_LO:
8501 case R_PPC64_TOC16_LO_DS:
8502 insn_check = check_lo;
8503 break;
8504 }
8505
8506 if (insn_check != no_check)
8507 {
8508 bfd_vma off = rel->r_offset & ~3;
8509 unsigned char buf[4];
8510 unsigned int insn;
8511
8512 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8513 {
8514 free (used);
8515 goto error_ret;
8516 }
8517 insn = bfd_get_32 (ibfd, buf);
8518 if (insn_check == check_lo
8519 ? !ok_lo_toc_insn (insn)
8520 : ((insn & ((0x3f << 26) | 0x1f << 16))
8521 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8522 {
8523 char str[12];
8524
8525 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8526 sprintf (str, "%#08x", insn);
8527 info->callbacks->einfo
8528 (_("%P: %H: toc optimization is not supported for"
8529 " %s instruction.\n"),
8530 ibfd, sec, rel->r_offset & ~3, str);
8531 }
8532 }
8533
8534 switch (r_type)
8535 {
8536 case R_PPC64_TOC16:
8537 case R_PPC64_TOC16_LO:
8538 case R_PPC64_TOC16_HI:
8539 case R_PPC64_TOC16_HA:
8540 case R_PPC64_TOC16_DS:
8541 case R_PPC64_TOC16_LO_DS:
8542 /* In case we're taking addresses of toc entries. */
8543 case R_PPC64_ADDR64:
8544 break;
8545
8546 default:
8547 continue;
8548 }
8549
8550 r_symndx = ELF64_R_SYM (rel->r_info);
8551 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8552 r_symndx, ibfd))
8553 {
8554 free (used);
8555 goto error_ret;
8556 }
8557
8558 if (sym_sec != toc)
8559 continue;
8560
8561 if (h != NULL)
8562 val = h->root.u.def.value;
8563 else
8564 val = sym->st_value;
8565 val += rel->r_addend;
8566
8567 if (val >= toc->size)
8568 continue;
8569
8570 if ((skip[val >> 3] & can_optimize) != 0)
8571 {
8572 bfd_vma off;
8573 unsigned char opc;
8574
8575 switch (r_type)
8576 {
8577 case R_PPC64_TOC16_HA:
8578 break;
8579
8580 case R_PPC64_TOC16_LO_DS:
8581 off = rel->r_offset;
8582 off += (bfd_big_endian (ibfd) ? -2 : 3);
8583 if (!bfd_get_section_contents (ibfd, sec, &opc,
8584 off, 1))
8585 {
8586 free (used);
8587 goto error_ret;
8588 }
8589 if ((opc & (0x3f << 2)) == (58u << 2))
8590 break;
8591 /* Fall thru */
8592
8593 default:
8594 /* Wrong sort of reloc, or not a ld. We may
8595 as well clear ref_from_discarded too. */
8596 skip[val >> 3] = 0;
8597 }
8598 }
8599
8600 if (sec != toc)
8601 used[val >> 3] = 1;
8602 /* For the toc section, we only mark as used if this
8603 entry itself isn't unused. */
8604 else if ((used[rel->r_offset >> 3]
8605 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8606 && !used[val >> 3])
8607 {
8608 /* Do all the relocs again, to catch reference
8609 chains. */
8610 repeat = 1;
8611 used[val >> 3] = 1;
8612 }
8613 }
8614 }
8615 while (repeat);
8616
8617 if (elf_section_data (sec)->relocs != relstart)
8618 free (relstart);
8619 }
8620
8621 /* Merge the used and skip arrays. Assume that TOC
8622 doublewords not appearing as either used or unused belong
8623 to to an entry more than one doubleword in size. */
8624 for (drop = skip, keep = used, last = 0, some_unused = 0;
8625 drop < skip + (toc->size + 7) / 8;
8626 ++drop, ++keep)
8627 {
8628 if (*keep)
8629 {
8630 *drop &= ~ref_from_discarded;
8631 if ((*drop & can_optimize) != 0)
8632 some_unused = 1;
8633 last = 0;
8634 }
8635 else if ((*drop & ref_from_discarded) != 0)
8636 {
8637 some_unused = 1;
8638 last = ref_from_discarded;
8639 }
8640 else
8641 *drop = last;
8642 }
8643
8644 free (used);
8645
8646 if (some_unused)
8647 {
8648 bfd_byte *contents, *src;
8649 unsigned long off;
8650 Elf_Internal_Sym *sym;
8651 bfd_boolean local_toc_syms = FALSE;
8652
8653 /* Shuffle the toc contents, and at the same time convert the
8654 skip array from booleans into offsets. */
8655 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8656 goto error_ret;
8657
8658 elf_section_data (toc)->this_hdr.contents = contents;
8659
8660 for (src = contents, off = 0, drop = skip;
8661 src < contents + toc->size;
8662 src += 8, ++drop)
8663 {
8664 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8665 off += 8;
8666 else if (off != 0)
8667 {
8668 *drop = off;
8669 memcpy (src - off, src, 8);
8670 }
8671 }
8672 *drop = off;
8673 toc->rawsize = toc->size;
8674 toc->size = src - contents - off;
8675
8676 /* Adjust addends for relocs against the toc section sym,
8677 and optimize any accesses we can. */
8678 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8679 {
8680 if (sec->reloc_count == 0
8681 || discarded_section (sec))
8682 continue;
8683
8684 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8685 info->keep_memory);
8686 if (relstart == NULL)
8687 goto error_ret;
8688
8689 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8690 {
8691 enum elf_ppc64_reloc_type r_type;
8692 unsigned long r_symndx;
8693 asection *sym_sec;
8694 struct elf_link_hash_entry *h;
8695 bfd_vma val;
8696
8697 r_type = ELF64_R_TYPE (rel->r_info);
8698 switch (r_type)
8699 {
8700 default:
8701 continue;
8702
8703 case R_PPC64_TOC16:
8704 case R_PPC64_TOC16_LO:
8705 case R_PPC64_TOC16_HI:
8706 case R_PPC64_TOC16_HA:
8707 case R_PPC64_TOC16_DS:
8708 case R_PPC64_TOC16_LO_DS:
8709 case R_PPC64_ADDR64:
8710 break;
8711 }
8712
8713 r_symndx = ELF64_R_SYM (rel->r_info);
8714 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8715 r_symndx, ibfd))
8716 goto error_ret;
8717
8718 if (sym_sec != toc)
8719 continue;
8720
8721 if (h != NULL)
8722 val = h->root.u.def.value;
8723 else
8724 {
8725 val = sym->st_value;
8726 if (val != 0)
8727 local_toc_syms = TRUE;
8728 }
8729
8730 val += rel->r_addend;
8731
8732 if (val > toc->rawsize)
8733 val = toc->rawsize;
8734 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8735 continue;
8736 else if ((skip[val >> 3] & can_optimize) != 0)
8737 {
8738 Elf_Internal_Rela *tocrel
8739 = toc_relocs + (skip[val >> 3] >> 2);
8740 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8741
8742 switch (r_type)
8743 {
8744 case R_PPC64_TOC16_HA:
8745 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8746 break;
8747
8748 case R_PPC64_TOC16_LO_DS:
8749 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8750 break;
8751
8752 default:
8753 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8754 ppc_howto_init ();
8755 info->callbacks->einfo
8756 (_("%P: %H: %s references "
8757 "optimized away TOC entry\n"),
8758 ibfd, sec, rel->r_offset,
8759 ppc64_elf_howto_table[r_type]->name);
8760 bfd_set_error (bfd_error_bad_value);
8761 goto error_ret;
8762 }
8763 rel->r_addend = tocrel->r_addend;
8764 elf_section_data (sec)->relocs = relstart;
8765 continue;
8766 }
8767
8768 if (h != NULL || sym->st_value != 0)
8769 continue;
8770
8771 rel->r_addend -= skip[val >> 3];
8772 elf_section_data (sec)->relocs = relstart;
8773 }
8774
8775 if (elf_section_data (sec)->relocs != relstart)
8776 free (relstart);
8777 }
8778
8779 /* We shouldn't have local or global symbols defined in the TOC,
8780 but handle them anyway. */
8781 if (local_syms != NULL)
8782 for (sym = local_syms;
8783 sym < local_syms + symtab_hdr->sh_info;
8784 ++sym)
8785 if (sym->st_value != 0
8786 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8787 {
8788 unsigned long i;
8789
8790 if (sym->st_value > toc->rawsize)
8791 i = toc->rawsize >> 3;
8792 else
8793 i = sym->st_value >> 3;
8794
8795 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8796 {
8797 if (local_toc_syms)
8798 (*_bfd_error_handler)
8799 (_("%s defined on removed toc entry"),
8800 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8801 do
8802 ++i;
8803 while ((skip[i] & (ref_from_discarded | can_optimize)));
8804 sym->st_value = (bfd_vma) i << 3;
8805 }
8806
8807 sym->st_value -= skip[i];
8808 symtab_hdr->contents = (unsigned char *) local_syms;
8809 }
8810
8811 /* Adjust any global syms defined in this toc input section. */
8812 if (toc_inf.global_toc_syms)
8813 {
8814 toc_inf.toc = toc;
8815 toc_inf.skip = skip;
8816 toc_inf.global_toc_syms = FALSE;
8817 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8818 &toc_inf);
8819 }
8820
8821 if (toc->reloc_count != 0)
8822 {
8823 Elf_Internal_Shdr *rel_hdr;
8824 Elf_Internal_Rela *wrel;
8825 bfd_size_type sz;
8826
8827 /* Remove unused toc relocs, and adjust those we keep. */
8828 if (toc_relocs == NULL)
8829 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8830 info->keep_memory);
8831 if (toc_relocs == NULL)
8832 goto error_ret;
8833
8834 wrel = toc_relocs;
8835 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8836 if ((skip[rel->r_offset >> 3]
8837 & (ref_from_discarded | can_optimize)) == 0)
8838 {
8839 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8840 wrel->r_info = rel->r_info;
8841 wrel->r_addend = rel->r_addend;
8842 ++wrel;
8843 }
8844 else if (!dec_dynrel_count (rel->r_info, toc, info,
8845 &local_syms, NULL, NULL))
8846 goto error_ret;
8847
8848 elf_section_data (toc)->relocs = toc_relocs;
8849 toc->reloc_count = wrel - toc_relocs;
8850 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8851 sz = rel_hdr->sh_entsize;
8852 rel_hdr->sh_size = toc->reloc_count * sz;
8853 }
8854 }
8855 else if (toc_relocs != NULL
8856 && elf_section_data (toc)->relocs != toc_relocs)
8857 free (toc_relocs);
8858
8859 if (local_syms != NULL
8860 && symtab_hdr->contents != (unsigned char *) local_syms)
8861 {
8862 if (!info->keep_memory)
8863 free (local_syms);
8864 else
8865 symtab_hdr->contents = (unsigned char *) local_syms;
8866 }
8867 free (skip);
8868 }
8869
8870 return TRUE;
8871 }
8872
8873 /* Return true iff input section I references the TOC using
8874 instructions limited to +/-32k offsets. */
8875
8876 bfd_boolean
8877 ppc64_elf_has_small_toc_reloc (asection *i)
8878 {
8879 return (is_ppc64_elf (i->owner)
8880 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8881 }
8882
8883 /* Allocate space for one GOT entry. */
8884
8885 static void
8886 allocate_got (struct elf_link_hash_entry *h,
8887 struct bfd_link_info *info,
8888 struct got_entry *gent)
8889 {
8890 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8891 bfd_boolean dyn;
8892 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8893 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8894 ? 16 : 8);
8895 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8896 ? 2 : 1) * sizeof (Elf64_External_Rela);
8897 asection *got = ppc64_elf_tdata (gent->owner)->got;
8898
8899 gent->got.offset = got->size;
8900 got->size += entsize;
8901
8902 dyn = htab->elf.dynamic_sections_created;
8903 if (h->type == STT_GNU_IFUNC)
8904 {
8905 htab->reliplt->size += rentsize;
8906 htab->got_reli_size += rentsize;
8907 }
8908 else if ((info->shared
8909 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8910 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8911 || h->root.type != bfd_link_hash_undefweak))
8912 {
8913 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8914 relgot->size += rentsize;
8915 }
8916 }
8917
8918 /* This function merges got entries in the same toc group. */
8919
8920 static void
8921 merge_got_entries (struct got_entry **pent)
8922 {
8923 struct got_entry *ent, *ent2;
8924
8925 for (ent = *pent; ent != NULL; ent = ent->next)
8926 if (!ent->is_indirect)
8927 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8928 if (!ent2->is_indirect
8929 && ent2->addend == ent->addend
8930 && ent2->tls_type == ent->tls_type
8931 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8932 {
8933 ent2->is_indirect = TRUE;
8934 ent2->got.ent = ent;
8935 }
8936 }
8937
8938 /* Allocate space in .plt, .got and associated reloc sections for
8939 dynamic relocs. */
8940
8941 static bfd_boolean
8942 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8943 {
8944 struct bfd_link_info *info;
8945 struct ppc_link_hash_table *htab;
8946 asection *s;
8947 struct ppc_link_hash_entry *eh;
8948 struct elf_dyn_relocs *p;
8949 struct got_entry **pgent, *gent;
8950
8951 if (h->root.type == bfd_link_hash_indirect)
8952 return TRUE;
8953
8954 info = (struct bfd_link_info *) inf;
8955 htab = ppc_hash_table (info);
8956 if (htab == NULL)
8957 return FALSE;
8958
8959 if ((htab->elf.dynamic_sections_created
8960 && h->dynindx != -1
8961 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8962 || h->type == STT_GNU_IFUNC)
8963 {
8964 struct plt_entry *pent;
8965 bfd_boolean doneone = FALSE;
8966 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8967 if (pent->plt.refcount > 0)
8968 {
8969 if (!htab->elf.dynamic_sections_created
8970 || h->dynindx == -1)
8971 {
8972 s = htab->iplt;
8973 pent->plt.offset = s->size;
8974 s->size += PLT_ENTRY_SIZE;
8975 s = htab->reliplt;
8976 }
8977 else
8978 {
8979 /* If this is the first .plt entry, make room for the special
8980 first entry. */
8981 s = htab->plt;
8982 if (s->size == 0)
8983 s->size += PLT_INITIAL_ENTRY_SIZE;
8984
8985 pent->plt.offset = s->size;
8986
8987 /* Make room for this entry. */
8988 s->size += PLT_ENTRY_SIZE;
8989
8990 /* Make room for the .glink code. */
8991 s = htab->glink;
8992 if (s->size == 0)
8993 s->size += GLINK_CALL_STUB_SIZE;
8994 /* We need bigger stubs past index 32767. */
8995 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8996 s->size += 4;
8997 s->size += 2*4;
8998
8999 /* We also need to make an entry in the .rela.plt section. */
9000 s = htab->relplt;
9001 }
9002 s->size += sizeof (Elf64_External_Rela);
9003 doneone = TRUE;
9004 }
9005 else
9006 pent->plt.offset = (bfd_vma) -1;
9007 if (!doneone)
9008 {
9009 h->plt.plist = NULL;
9010 h->needs_plt = 0;
9011 }
9012 }
9013 else
9014 {
9015 h->plt.plist = NULL;
9016 h->needs_plt = 0;
9017 }
9018
9019 eh = (struct ppc_link_hash_entry *) h;
9020 /* Run through the TLS GD got entries first if we're changing them
9021 to TPREL. */
9022 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9023 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9024 if (gent->got.refcount > 0
9025 && (gent->tls_type & TLS_GD) != 0)
9026 {
9027 /* This was a GD entry that has been converted to TPREL. If
9028 there happens to be a TPREL entry we can use that one. */
9029 struct got_entry *ent;
9030 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9031 if (ent->got.refcount > 0
9032 && (ent->tls_type & TLS_TPREL) != 0
9033 && ent->addend == gent->addend
9034 && ent->owner == gent->owner)
9035 {
9036 gent->got.refcount = 0;
9037 break;
9038 }
9039
9040 /* If not, then we'll be using our own TPREL entry. */
9041 if (gent->got.refcount != 0)
9042 gent->tls_type = TLS_TLS | TLS_TPREL;
9043 }
9044
9045 /* Remove any list entry that won't generate a word in the GOT before
9046 we call merge_got_entries. Otherwise we risk merging to empty
9047 entries. */
9048 pgent = &h->got.glist;
9049 while ((gent = *pgent) != NULL)
9050 if (gent->got.refcount > 0)
9051 {
9052 if ((gent->tls_type & TLS_LD) != 0
9053 && !h->def_dynamic)
9054 {
9055 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9056 *pgent = gent->next;
9057 }
9058 else
9059 pgent = &gent->next;
9060 }
9061 else
9062 *pgent = gent->next;
9063
9064 if (!htab->do_multi_toc)
9065 merge_got_entries (&h->got.glist);
9066
9067 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9068 if (!gent->is_indirect)
9069 {
9070 /* Make sure this symbol is output as a dynamic symbol.
9071 Undefined weak syms won't yet be marked as dynamic,
9072 nor will all TLS symbols. */
9073 if (h->dynindx == -1
9074 && !h->forced_local
9075 && h->type != STT_GNU_IFUNC
9076 && htab->elf.dynamic_sections_created)
9077 {
9078 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9079 return FALSE;
9080 }
9081
9082 if (!is_ppc64_elf (gent->owner))
9083 abort ();
9084
9085 allocate_got (h, info, gent);
9086 }
9087
9088 if (eh->dyn_relocs == NULL
9089 || (!htab->elf.dynamic_sections_created
9090 && h->type != STT_GNU_IFUNC))
9091 return TRUE;
9092
9093 /* In the shared -Bsymbolic case, discard space allocated for
9094 dynamic pc-relative relocs against symbols which turn out to be
9095 defined in regular objects. For the normal shared case, discard
9096 space for relocs that have become local due to symbol visibility
9097 changes. */
9098
9099 if (info->shared)
9100 {
9101 /* Relocs that use pc_count are those that appear on a call insn,
9102 or certain REL relocs (see must_be_dyn_reloc) that can be
9103 generated via assembly. We want calls to protected symbols to
9104 resolve directly to the function rather than going via the plt.
9105 If people want function pointer comparisons to work as expected
9106 then they should avoid writing weird assembly. */
9107 if (SYMBOL_CALLS_LOCAL (info, h))
9108 {
9109 struct elf_dyn_relocs **pp;
9110
9111 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9112 {
9113 p->count -= p->pc_count;
9114 p->pc_count = 0;
9115 if (p->count == 0)
9116 *pp = p->next;
9117 else
9118 pp = &p->next;
9119 }
9120 }
9121
9122 /* Also discard relocs on undefined weak syms with non-default
9123 visibility. */
9124 if (eh->dyn_relocs != NULL
9125 && h->root.type == bfd_link_hash_undefweak)
9126 {
9127 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9128 eh->dyn_relocs = NULL;
9129
9130 /* Make sure this symbol is output as a dynamic symbol.
9131 Undefined weak syms won't yet be marked as dynamic. */
9132 else if (h->dynindx == -1
9133 && !h->forced_local)
9134 {
9135 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9136 return FALSE;
9137 }
9138 }
9139 }
9140 else if (h->type == STT_GNU_IFUNC)
9141 {
9142 if (!h->non_got_ref)
9143 eh->dyn_relocs = NULL;
9144 }
9145 else if (ELIMINATE_COPY_RELOCS)
9146 {
9147 /* For the non-shared case, discard space for relocs against
9148 symbols which turn out to need copy relocs or are not
9149 dynamic. */
9150
9151 if (!h->non_got_ref
9152 && !h->def_regular)
9153 {
9154 /* Make sure this symbol is output as a dynamic symbol.
9155 Undefined weak syms won't yet be marked as dynamic. */
9156 if (h->dynindx == -1
9157 && !h->forced_local)
9158 {
9159 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9160 return FALSE;
9161 }
9162
9163 /* If that succeeded, we know we'll be keeping all the
9164 relocs. */
9165 if (h->dynindx != -1)
9166 goto keep;
9167 }
9168
9169 eh->dyn_relocs = NULL;
9170
9171 keep: ;
9172 }
9173
9174 /* Finally, allocate space. */
9175 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9176 {
9177 asection *sreloc = elf_section_data (p->sec)->sreloc;
9178 if (eh->elf.type == STT_GNU_IFUNC)
9179 sreloc = htab->reliplt;
9180 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9181 }
9182
9183 return TRUE;
9184 }
9185
9186 /* Find any dynamic relocs that apply to read-only sections. */
9187
9188 static bfd_boolean
9189 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9190 {
9191 struct ppc_link_hash_entry *eh;
9192 struct elf_dyn_relocs *p;
9193
9194 eh = (struct ppc_link_hash_entry *) h;
9195 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9196 {
9197 asection *s = p->sec->output_section;
9198
9199 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9200 {
9201 struct bfd_link_info *info = inf;
9202
9203 info->flags |= DF_TEXTREL;
9204
9205 /* Not an error, just cut short the traversal. */
9206 return FALSE;
9207 }
9208 }
9209 return TRUE;
9210 }
9211
9212 /* Set the sizes of the dynamic sections. */
9213
9214 static bfd_boolean
9215 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9216 struct bfd_link_info *info)
9217 {
9218 struct ppc_link_hash_table *htab;
9219 bfd *dynobj;
9220 asection *s;
9221 bfd_boolean relocs;
9222 bfd *ibfd;
9223 struct got_entry *first_tlsld;
9224
9225 htab = ppc_hash_table (info);
9226 if (htab == NULL)
9227 return FALSE;
9228
9229 dynobj = htab->elf.dynobj;
9230 if (dynobj == NULL)
9231 abort ();
9232
9233 if (htab->elf.dynamic_sections_created)
9234 {
9235 /* Set the contents of the .interp section to the interpreter. */
9236 if (info->executable)
9237 {
9238 s = bfd_get_linker_section (dynobj, ".interp");
9239 if (s == NULL)
9240 abort ();
9241 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9242 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9243 }
9244 }
9245
9246 /* Set up .got offsets for local syms, and space for local dynamic
9247 relocs. */
9248 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9249 {
9250 struct got_entry **lgot_ents;
9251 struct got_entry **end_lgot_ents;
9252 struct plt_entry **local_plt;
9253 struct plt_entry **end_local_plt;
9254 unsigned char *lgot_masks;
9255 bfd_size_type locsymcount;
9256 Elf_Internal_Shdr *symtab_hdr;
9257
9258 if (!is_ppc64_elf (ibfd))
9259 continue;
9260
9261 for (s = ibfd->sections; s != NULL; s = s->next)
9262 {
9263 struct ppc_dyn_relocs *p;
9264
9265 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9266 {
9267 if (!bfd_is_abs_section (p->sec)
9268 && bfd_is_abs_section (p->sec->output_section))
9269 {
9270 /* Input section has been discarded, either because
9271 it is a copy of a linkonce section or due to
9272 linker script /DISCARD/, so we'll be discarding
9273 the relocs too. */
9274 }
9275 else if (p->count != 0)
9276 {
9277 asection *srel = elf_section_data (p->sec)->sreloc;
9278 if (p->ifunc)
9279 srel = htab->reliplt;
9280 srel->size += p->count * sizeof (Elf64_External_Rela);
9281 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9282 info->flags |= DF_TEXTREL;
9283 }
9284 }
9285 }
9286
9287 lgot_ents = elf_local_got_ents (ibfd);
9288 if (!lgot_ents)
9289 continue;
9290
9291 symtab_hdr = &elf_symtab_hdr (ibfd);
9292 locsymcount = symtab_hdr->sh_info;
9293 end_lgot_ents = lgot_ents + locsymcount;
9294 local_plt = (struct plt_entry **) end_lgot_ents;
9295 end_local_plt = local_plt + locsymcount;
9296 lgot_masks = (unsigned char *) end_local_plt;
9297 s = ppc64_elf_tdata (ibfd)->got;
9298 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9299 {
9300 struct got_entry **pent, *ent;
9301
9302 pent = lgot_ents;
9303 while ((ent = *pent) != NULL)
9304 if (ent->got.refcount > 0)
9305 {
9306 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9307 {
9308 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9309 *pent = ent->next;
9310 }
9311 else
9312 {
9313 unsigned int ent_size = 8;
9314 unsigned int rel_size = sizeof (Elf64_External_Rela);
9315
9316 ent->got.offset = s->size;
9317 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9318 {
9319 ent_size *= 2;
9320 rel_size *= 2;
9321 }
9322 s->size += ent_size;
9323 if ((*lgot_masks & PLT_IFUNC) != 0)
9324 {
9325 htab->reliplt->size += rel_size;
9326 htab->got_reli_size += rel_size;
9327 }
9328 else if (info->shared)
9329 {
9330 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9331 srel->size += rel_size;
9332 }
9333 pent = &ent->next;
9334 }
9335 }
9336 else
9337 *pent = ent->next;
9338 }
9339
9340 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9341 for (; local_plt < end_local_plt; ++local_plt)
9342 {
9343 struct plt_entry *ent;
9344
9345 for (ent = *local_plt; ent != NULL; ent = ent->next)
9346 if (ent->plt.refcount > 0)
9347 {
9348 s = htab->iplt;
9349 ent->plt.offset = s->size;
9350 s->size += PLT_ENTRY_SIZE;
9351
9352 htab->reliplt->size += sizeof (Elf64_External_Rela);
9353 }
9354 else
9355 ent->plt.offset = (bfd_vma) -1;
9356 }
9357 }
9358
9359 /* Allocate global sym .plt and .got entries, and space for global
9360 sym dynamic relocs. */
9361 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9362
9363 first_tlsld = NULL;
9364 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9365 {
9366 struct got_entry *ent;
9367
9368 if (!is_ppc64_elf (ibfd))
9369 continue;
9370
9371 ent = ppc64_tlsld_got (ibfd);
9372 if (ent->got.refcount > 0)
9373 {
9374 if (!htab->do_multi_toc && first_tlsld != NULL)
9375 {
9376 ent->is_indirect = TRUE;
9377 ent->got.ent = first_tlsld;
9378 }
9379 else
9380 {
9381 if (first_tlsld == NULL)
9382 first_tlsld = ent;
9383 s = ppc64_elf_tdata (ibfd)->got;
9384 ent->got.offset = s->size;
9385 ent->owner = ibfd;
9386 s->size += 16;
9387 if (info->shared)
9388 {
9389 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9390 srel->size += sizeof (Elf64_External_Rela);
9391 }
9392 }
9393 }
9394 else
9395 ent->got.offset = (bfd_vma) -1;
9396 }
9397
9398 /* We now have determined the sizes of the various dynamic sections.
9399 Allocate memory for them. */
9400 relocs = FALSE;
9401 for (s = dynobj->sections; s != NULL; s = s->next)
9402 {
9403 if ((s->flags & SEC_LINKER_CREATED) == 0)
9404 continue;
9405
9406 if (s == htab->brlt || s == htab->relbrlt)
9407 /* These haven't been allocated yet; don't strip. */
9408 continue;
9409 else if (s == htab->got
9410 || s == htab->plt
9411 || s == htab->iplt
9412 || s == htab->glink
9413 || s == htab->dynbss)
9414 {
9415 /* Strip this section if we don't need it; see the
9416 comment below. */
9417 }
9418 else if (s == htab->glink_eh_frame)
9419 {
9420 if (!bfd_is_abs_section (s->output_section))
9421 /* Not sized yet. */
9422 continue;
9423 }
9424 else if (CONST_STRNEQ (s->name, ".rela"))
9425 {
9426 if (s->size != 0)
9427 {
9428 if (s != htab->relplt)
9429 relocs = TRUE;
9430
9431 /* We use the reloc_count field as a counter if we need
9432 to copy relocs into the output file. */
9433 s->reloc_count = 0;
9434 }
9435 }
9436 else
9437 {
9438 /* It's not one of our sections, so don't allocate space. */
9439 continue;
9440 }
9441
9442 if (s->size == 0)
9443 {
9444 /* If we don't need this section, strip it from the
9445 output file. This is mostly to handle .rela.bss and
9446 .rela.plt. We must create both sections in
9447 create_dynamic_sections, because they must be created
9448 before the linker maps input sections to output
9449 sections. The linker does that before
9450 adjust_dynamic_symbol is called, and it is that
9451 function which decides whether anything needs to go
9452 into these sections. */
9453 s->flags |= SEC_EXCLUDE;
9454 continue;
9455 }
9456
9457 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9458 continue;
9459
9460 /* Allocate memory for the section contents. We use bfd_zalloc
9461 here in case unused entries are not reclaimed before the
9462 section's contents are written out. This should not happen,
9463 but this way if it does we get a R_PPC64_NONE reloc in .rela
9464 sections instead of garbage.
9465 We also rely on the section contents being zero when writing
9466 the GOT. */
9467 s->contents = bfd_zalloc (dynobj, s->size);
9468 if (s->contents == NULL)
9469 return FALSE;
9470 }
9471
9472 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9473 {
9474 if (!is_ppc64_elf (ibfd))
9475 continue;
9476
9477 s = ppc64_elf_tdata (ibfd)->got;
9478 if (s != NULL && s != htab->got)
9479 {
9480 if (s->size == 0)
9481 s->flags |= SEC_EXCLUDE;
9482 else
9483 {
9484 s->contents = bfd_zalloc (ibfd, s->size);
9485 if (s->contents == NULL)
9486 return FALSE;
9487 }
9488 }
9489 s = ppc64_elf_tdata (ibfd)->relgot;
9490 if (s != NULL)
9491 {
9492 if (s->size == 0)
9493 s->flags |= SEC_EXCLUDE;
9494 else
9495 {
9496 s->contents = bfd_zalloc (ibfd, s->size);
9497 if (s->contents == NULL)
9498 return FALSE;
9499 relocs = TRUE;
9500 s->reloc_count = 0;
9501 }
9502 }
9503 }
9504
9505 if (htab->elf.dynamic_sections_created)
9506 {
9507 /* Add some entries to the .dynamic section. We fill in the
9508 values later, in ppc64_elf_finish_dynamic_sections, but we
9509 must add the entries now so that we get the correct size for
9510 the .dynamic section. The DT_DEBUG entry is filled in by the
9511 dynamic linker and used by the debugger. */
9512 #define add_dynamic_entry(TAG, VAL) \
9513 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9514
9515 if (info->executable)
9516 {
9517 if (!add_dynamic_entry (DT_DEBUG, 0))
9518 return FALSE;
9519 }
9520
9521 if (htab->plt != NULL && htab->plt->size != 0)
9522 {
9523 if (!add_dynamic_entry (DT_PLTGOT, 0)
9524 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9525 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9526 || !add_dynamic_entry (DT_JMPREL, 0)
9527 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9528 return FALSE;
9529 }
9530
9531 if (NO_OPD_RELOCS)
9532 {
9533 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9534 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9535 return FALSE;
9536 }
9537
9538 if (!htab->no_tls_get_addr_opt
9539 && htab->tls_get_addr_fd != NULL
9540 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9541 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9542 return FALSE;
9543
9544 if (relocs)
9545 {
9546 if (!add_dynamic_entry (DT_RELA, 0)
9547 || !add_dynamic_entry (DT_RELASZ, 0)
9548 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9549 return FALSE;
9550
9551 /* If any dynamic relocs apply to a read-only section,
9552 then we need a DT_TEXTREL entry. */
9553 if ((info->flags & DF_TEXTREL) == 0)
9554 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9555
9556 if ((info->flags & DF_TEXTREL) != 0)
9557 {
9558 if (!add_dynamic_entry (DT_TEXTREL, 0))
9559 return FALSE;
9560 }
9561 }
9562 }
9563 #undef add_dynamic_entry
9564
9565 return TRUE;
9566 }
9567
9568 /* Determine the type of stub needed, if any, for a call. */
9569
9570 static inline enum ppc_stub_type
9571 ppc_type_of_stub (asection *input_sec,
9572 const Elf_Internal_Rela *rel,
9573 struct ppc_link_hash_entry **hash,
9574 struct plt_entry **plt_ent,
9575 bfd_vma destination)
9576 {
9577 struct ppc_link_hash_entry *h = *hash;
9578 bfd_vma location;
9579 bfd_vma branch_offset;
9580 bfd_vma max_branch_offset;
9581 enum elf_ppc64_reloc_type r_type;
9582
9583 if (h != NULL)
9584 {
9585 struct plt_entry *ent;
9586 struct ppc_link_hash_entry *fdh = h;
9587 if (h->oh != NULL
9588 && h->oh->is_func_descriptor)
9589 {
9590 fdh = ppc_follow_link (h->oh);
9591 *hash = fdh;
9592 }
9593
9594 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9595 if (ent->addend == rel->r_addend
9596 && ent->plt.offset != (bfd_vma) -1)
9597 {
9598 *plt_ent = ent;
9599 return ppc_stub_plt_call;
9600 }
9601
9602 /* Here, we know we don't have a plt entry. If we don't have a
9603 either a defined function descriptor or a defined entry symbol
9604 in a regular object file, then it is pointless trying to make
9605 any other type of stub. */
9606 if (!is_static_defined (&fdh->elf)
9607 && !is_static_defined (&h->elf))
9608 return ppc_stub_none;
9609 }
9610 else if (elf_local_got_ents (input_sec->owner) != NULL)
9611 {
9612 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9613 struct plt_entry **local_plt = (struct plt_entry **)
9614 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9615 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9616
9617 if (local_plt[r_symndx] != NULL)
9618 {
9619 struct plt_entry *ent;
9620
9621 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9622 if (ent->addend == rel->r_addend
9623 && ent->plt.offset != (bfd_vma) -1)
9624 {
9625 *plt_ent = ent;
9626 return ppc_stub_plt_call;
9627 }
9628 }
9629 }
9630
9631 /* Determine where the call point is. */
9632 location = (input_sec->output_offset
9633 + input_sec->output_section->vma
9634 + rel->r_offset);
9635
9636 branch_offset = destination - location;
9637 r_type = ELF64_R_TYPE (rel->r_info);
9638
9639 /* Determine if a long branch stub is needed. */
9640 max_branch_offset = 1 << 25;
9641 if (r_type != R_PPC64_REL24)
9642 max_branch_offset = 1 << 15;
9643
9644 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9645 /* We need a stub. Figure out whether a long_branch or plt_branch
9646 is needed later. */
9647 return ppc_stub_long_branch;
9648
9649 return ppc_stub_none;
9650 }
9651
9652 /* With power7 weakly ordered memory model, it is possible for ld.so
9653 to update a plt entry in one thread and have another thread see a
9654 stale zero toc entry. To avoid this we need some sort of acquire
9655 barrier in the call stub. One solution is to make the load of the
9656 toc word seem to appear to depend on the load of the function entry
9657 word. Another solution is to test for r2 being zero, and branch to
9658 the appropriate glink entry if so.
9659
9660 . fake dep barrier compare
9661 . ld 11,xxx(2) ld 11,xxx(2)
9662 . mtctr 11 mtctr 11
9663 . xor 11,11,11 ld 2,xxx+8(2)
9664 . add 2,2,11 cmpldi 2,0
9665 . ld 2,xxx+8(2) bnectr+
9666 . bctr b <glink_entry>
9667
9668 The solution involving the compare turns out to be faster, so
9669 that's what we use unless the branch won't reach. */
9670
9671 #define ALWAYS_USE_FAKE_DEP 0
9672 #define ALWAYS_EMIT_R2SAVE 0
9673
9674 #define PPC_LO(v) ((v) & 0xffff)
9675 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9676 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9677
9678 static inline unsigned int
9679 plt_stub_size (struct ppc_link_hash_table *htab,
9680 struct ppc_stub_hash_entry *stub_entry,
9681 bfd_vma off)
9682 {
9683 unsigned size = PLT_CALL_STUB_SIZE;
9684
9685 if (!(ALWAYS_EMIT_R2SAVE
9686 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9687 size -= 4;
9688 if (!htab->plt_static_chain)
9689 size -= 4;
9690 if (htab->plt_thread_safe)
9691 size += 8;
9692 if (PPC_HA (off) == 0)
9693 size -= 4;
9694 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9695 size += 4;
9696 if (stub_entry->h != NULL
9697 && (stub_entry->h == htab->tls_get_addr_fd
9698 || stub_entry->h == htab->tls_get_addr)
9699 && !htab->no_tls_get_addr_opt)
9700 size += 13 * 4;
9701 return size;
9702 }
9703
9704 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9705 then return the padding needed to do so. */
9706 static inline unsigned int
9707 plt_stub_pad (struct ppc_link_hash_table *htab,
9708 struct ppc_stub_hash_entry *stub_entry,
9709 bfd_vma plt_off)
9710 {
9711 int stub_align = 1 << htab->plt_stub_align;
9712 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9713 bfd_vma stub_off = stub_entry->stub_sec->size;
9714
9715 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9716 > (stub_size & -stub_align))
9717 return stub_align - (stub_off & (stub_align - 1));
9718 return 0;
9719 }
9720
9721 /* Build a .plt call stub. */
9722
9723 static inline bfd_byte *
9724 build_plt_stub (struct ppc_link_hash_table *htab,
9725 struct ppc_stub_hash_entry *stub_entry,
9726 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9727 {
9728 bfd *obfd = htab->stub_bfd;
9729 bfd_boolean plt_static_chain = htab->plt_static_chain;
9730 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9731 bfd_boolean use_fake_dep = plt_thread_safe;
9732 bfd_vma cmp_branch_off = 0;
9733
9734 if (!ALWAYS_USE_FAKE_DEP
9735 && plt_thread_safe
9736 && !(stub_entry->h != NULL
9737 && (stub_entry->h == htab->tls_get_addr_fd
9738 || stub_entry->h == htab->tls_get_addr)
9739 && !htab->no_tls_get_addr_opt))
9740 {
9741 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9742 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9743 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9744 bfd_vma to, from;
9745
9746 if (pltindex > 32768)
9747 glinkoff += (pltindex - 32768) * 4;
9748 to = (glinkoff
9749 + htab->glink->output_offset
9750 + htab->glink->output_section->vma);
9751 from = (p - stub_entry->stub_sec->contents
9752 + 4 * (ALWAYS_EMIT_R2SAVE
9753 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9754 + 4 * (PPC_HA (offset) != 0)
9755 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9756 != PPC_HA (offset))
9757 + 4 * (plt_static_chain != 0)
9758 + 20
9759 + stub_entry->stub_sec->output_offset
9760 + stub_entry->stub_sec->output_section->vma);
9761 cmp_branch_off = to - from;
9762 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9763 }
9764
9765 if (PPC_HA (offset) != 0)
9766 {
9767 if (r != NULL)
9768 {
9769 if (ALWAYS_EMIT_R2SAVE
9770 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9771 r[0].r_offset += 4;
9772 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9773 r[1].r_offset = r[0].r_offset + 4;
9774 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9775 r[1].r_addend = r[0].r_addend;
9776 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9777 {
9778 r[2].r_offset = r[1].r_offset + 4;
9779 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9780 r[2].r_addend = r[0].r_addend;
9781 }
9782 else
9783 {
9784 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9785 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9786 r[2].r_addend = r[0].r_addend + 8;
9787 if (plt_static_chain)
9788 {
9789 r[3].r_offset = r[2].r_offset + 4;
9790 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9791 r[3].r_addend = r[0].r_addend + 16;
9792 }
9793 }
9794 }
9795 if (ALWAYS_EMIT_R2SAVE
9796 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9797 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9798 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9799 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9800 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9801 {
9802 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9803 offset = 0;
9804 }
9805 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9806 if (use_fake_dep)
9807 {
9808 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9809 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9810 }
9811 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9812 if (plt_static_chain)
9813 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9814 }
9815 else
9816 {
9817 if (r != NULL)
9818 {
9819 if (ALWAYS_EMIT_R2SAVE
9820 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9821 r[0].r_offset += 4;
9822 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9823 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9824 {
9825 r[1].r_offset = r[0].r_offset + 4;
9826 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9827 r[1].r_addend = r[0].r_addend;
9828 }
9829 else
9830 {
9831 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9832 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9833 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9834 if (plt_static_chain)
9835 {
9836 r[2].r_offset = r[1].r_offset + 4;
9837 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9838 r[2].r_addend = r[0].r_addend + 8;
9839 }
9840 }
9841 }
9842 if (ALWAYS_EMIT_R2SAVE
9843 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9844 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9845 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9846 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9847 {
9848 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9849 offset = 0;
9850 }
9851 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9852 if (use_fake_dep)
9853 {
9854 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9855 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9856 }
9857 if (plt_static_chain)
9858 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9859 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9860 }
9861 if (plt_thread_safe && !use_fake_dep)
9862 {
9863 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9864 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9865 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
9866 }
9867 else
9868 bfd_put_32 (obfd, BCTR, p), p += 4;
9869 return p;
9870 }
9871
9872 /* Build a special .plt call stub for __tls_get_addr. */
9873
9874 #define LD_R11_0R3 0xe9630000
9875 #define LD_R12_0R3 0xe9830000
9876 #define MR_R0_R3 0x7c601b78
9877 #define CMPDI_R11_0 0x2c2b0000
9878 #define ADD_R3_R12_R13 0x7c6c6a14
9879 #define BEQLR 0x4d820020
9880 #define MR_R3_R0 0x7c030378
9881 #define MFLR_R11 0x7d6802a6
9882 #define STD_R11_0R1 0xf9610000
9883 #define BCTRL 0x4e800421
9884 #define LD_R11_0R1 0xe9610000
9885 #define LD_R2_0R1 0xe8410000
9886 #define MTLR_R11 0x7d6803a6
9887
9888 static inline bfd_byte *
9889 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
9890 struct ppc_stub_hash_entry *stub_entry,
9891 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9892 {
9893 bfd *obfd = htab->stub_bfd;
9894
9895 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9896 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9897 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9898 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9899 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9900 bfd_put_32 (obfd, BEQLR, p), p += 4;
9901 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9902 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9903 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9904
9905 if (r != NULL)
9906 r[0].r_offset += 9 * 4;
9907 p = build_plt_stub (htab, stub_entry, p, offset, r);
9908 bfd_put_32 (obfd, BCTRL, p - 4);
9909
9910 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9911 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9912 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9913 bfd_put_32 (obfd, BLR, p), p += 4;
9914
9915 return p;
9916 }
9917
9918 static Elf_Internal_Rela *
9919 get_relocs (asection *sec, int count)
9920 {
9921 Elf_Internal_Rela *relocs;
9922 struct bfd_elf_section_data *elfsec_data;
9923
9924 elfsec_data = elf_section_data (sec);
9925 relocs = elfsec_data->relocs;
9926 if (relocs == NULL)
9927 {
9928 bfd_size_type relsize;
9929 relsize = sec->reloc_count * sizeof (*relocs);
9930 relocs = bfd_alloc (sec->owner, relsize);
9931 if (relocs == NULL)
9932 return NULL;
9933 elfsec_data->relocs = relocs;
9934 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9935 sizeof (Elf_Internal_Shdr));
9936 if (elfsec_data->rela.hdr == NULL)
9937 return NULL;
9938 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9939 * sizeof (Elf64_External_Rela));
9940 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9941 sec->reloc_count = 0;
9942 }
9943 relocs += sec->reloc_count;
9944 sec->reloc_count += count;
9945 return relocs;
9946 }
9947
9948 static bfd_vma
9949 get_r2off (struct bfd_link_info *info,
9950 struct ppc_stub_hash_entry *stub_entry)
9951 {
9952 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9953 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9954
9955 if (r2off == 0)
9956 {
9957 /* Support linking -R objects. Get the toc pointer from the
9958 opd entry. */
9959 char buf[8];
9960 asection *opd = stub_entry->h->elf.root.u.def.section;
9961 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9962
9963 if (strcmp (opd->name, ".opd") != 0
9964 || opd->reloc_count != 0)
9965 {
9966 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
9967 stub_entry->h->elf.root.root.string);
9968 bfd_set_error (bfd_error_bad_value);
9969 return 0;
9970 }
9971 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9972 return 0;
9973 r2off = bfd_get_64 (opd->owner, buf);
9974 r2off -= elf_gp (info->output_bfd);
9975 }
9976 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9977 return r2off;
9978 }
9979
9980 static bfd_boolean
9981 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9982 {
9983 struct ppc_stub_hash_entry *stub_entry;
9984 struct ppc_branch_hash_entry *br_entry;
9985 struct bfd_link_info *info;
9986 struct ppc_link_hash_table *htab;
9987 bfd_byte *loc;
9988 bfd_byte *p;
9989 bfd_vma dest, off;
9990 int size;
9991 Elf_Internal_Rela *r;
9992 asection *plt;
9993
9994 /* Massage our args to the form they really have. */
9995 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9996 info = in_arg;
9997
9998 htab = ppc_hash_table (info);
9999 if (htab == NULL)
10000 return FALSE;
10001
10002 /* Make a note of the offset within the stubs for this entry. */
10003 stub_entry->stub_offset = stub_entry->stub_sec->size;
10004 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10005
10006 htab->stub_count[stub_entry->stub_type - 1] += 1;
10007 switch (stub_entry->stub_type)
10008 {
10009 case ppc_stub_long_branch:
10010 case ppc_stub_long_branch_r2off:
10011 /* Branches are relative. This is where we are going to. */
10012 off = dest = (stub_entry->target_value
10013 + stub_entry->target_section->output_offset
10014 + stub_entry->target_section->output_section->vma);
10015
10016 /* And this is where we are coming from. */
10017 off -= (stub_entry->stub_offset
10018 + stub_entry->stub_sec->output_offset
10019 + stub_entry->stub_sec->output_section->vma);
10020
10021 size = 4;
10022 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10023 {
10024 bfd_vma r2off = get_r2off (info, stub_entry);
10025
10026 if (r2off == 0)
10027 {
10028 htab->stub_error = TRUE;
10029 return FALSE;
10030 }
10031 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10032 loc += 4;
10033 size = 12;
10034 if (PPC_HA (r2off) != 0)
10035 {
10036 size = 16;
10037 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10038 loc += 4;
10039 }
10040 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10041 loc += 4;
10042 off -= size - 4;
10043 }
10044 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10045
10046 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10047 {
10048 info->callbacks->einfo
10049 (_("%P: long branch stub `%s' offset overflow\n"),
10050 stub_entry->root.string);
10051 htab->stub_error = TRUE;
10052 return FALSE;
10053 }
10054
10055 if (info->emitrelocations)
10056 {
10057 r = get_relocs (stub_entry->stub_sec, 1);
10058 if (r == NULL)
10059 return FALSE;
10060 r->r_offset = loc - stub_entry->stub_sec->contents;
10061 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10062 r->r_addend = dest;
10063 if (stub_entry->h != NULL)
10064 {
10065 struct elf_link_hash_entry **hashes;
10066 unsigned long symndx;
10067 struct ppc_link_hash_entry *h;
10068
10069 hashes = elf_sym_hashes (htab->stub_bfd);
10070 if (hashes == NULL)
10071 {
10072 bfd_size_type hsize;
10073
10074 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10075 hashes = bfd_zalloc (htab->stub_bfd, hsize);
10076 if (hashes == NULL)
10077 return FALSE;
10078 elf_sym_hashes (htab->stub_bfd) = hashes;
10079 htab->stub_globals = 1;
10080 }
10081 symndx = htab->stub_globals++;
10082 h = stub_entry->h;
10083 hashes[symndx] = &h->elf;
10084 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10085 if (h->oh != NULL && h->oh->is_func)
10086 h = ppc_follow_link (h->oh);
10087 if (h->elf.root.u.def.section != stub_entry->target_section)
10088 /* H is an opd symbol. The addend must be zero. */
10089 r->r_addend = 0;
10090 else
10091 {
10092 off = (h->elf.root.u.def.value
10093 + h->elf.root.u.def.section->output_offset
10094 + h->elf.root.u.def.section->output_section->vma);
10095 r->r_addend -= off;
10096 }
10097 }
10098 }
10099 break;
10100
10101 case ppc_stub_plt_branch:
10102 case ppc_stub_plt_branch_r2off:
10103 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10104 stub_entry->root.string + 9,
10105 FALSE, FALSE);
10106 if (br_entry == NULL)
10107 {
10108 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10109 stub_entry->root.string);
10110 htab->stub_error = TRUE;
10111 return FALSE;
10112 }
10113
10114 dest = (stub_entry->target_value
10115 + stub_entry->target_section->output_offset
10116 + stub_entry->target_section->output_section->vma);
10117
10118 bfd_put_64 (htab->brlt->owner, dest,
10119 htab->brlt->contents + br_entry->offset);
10120
10121 if (br_entry->iter == htab->stub_iteration)
10122 {
10123 br_entry->iter = 0;
10124
10125 if (htab->relbrlt != NULL)
10126 {
10127 /* Create a reloc for the branch lookup table entry. */
10128 Elf_Internal_Rela rela;
10129 bfd_byte *rl;
10130
10131 rela.r_offset = (br_entry->offset
10132 + htab->brlt->output_offset
10133 + htab->brlt->output_section->vma);
10134 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10135 rela.r_addend = dest;
10136
10137 rl = htab->relbrlt->contents;
10138 rl += (htab->relbrlt->reloc_count++
10139 * sizeof (Elf64_External_Rela));
10140 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10141 }
10142 else if (info->emitrelocations)
10143 {
10144 r = get_relocs (htab->brlt, 1);
10145 if (r == NULL)
10146 return FALSE;
10147 /* brlt, being SEC_LINKER_CREATED does not go through the
10148 normal reloc processing. Symbols and offsets are not
10149 translated from input file to output file form, so
10150 set up the offset per the output file. */
10151 r->r_offset = (br_entry->offset
10152 + htab->brlt->output_offset
10153 + htab->brlt->output_section->vma);
10154 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10155 r->r_addend = dest;
10156 }
10157 }
10158
10159 dest = (br_entry->offset
10160 + htab->brlt->output_offset
10161 + htab->brlt->output_section->vma);
10162
10163 off = (dest
10164 - elf_gp (htab->brlt->output_section->owner)
10165 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10166
10167 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10168 {
10169 info->callbacks->einfo
10170 (_("%P: linkage table error against `%T'\n"),
10171 stub_entry->root.string);
10172 bfd_set_error (bfd_error_bad_value);
10173 htab->stub_error = TRUE;
10174 return FALSE;
10175 }
10176
10177 if (info->emitrelocations)
10178 {
10179 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10180 if (r == NULL)
10181 return FALSE;
10182 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10183 if (bfd_big_endian (info->output_bfd))
10184 r[0].r_offset += 2;
10185 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10186 r[0].r_offset += 4;
10187 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10188 r[0].r_addend = dest;
10189 if (PPC_HA (off) != 0)
10190 {
10191 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10192 r[1].r_offset = r[0].r_offset + 4;
10193 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10194 r[1].r_addend = r[0].r_addend;
10195 }
10196 }
10197
10198 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10199 {
10200 if (PPC_HA (off) != 0)
10201 {
10202 size = 16;
10203 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10204 loc += 4;
10205 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10206 }
10207 else
10208 {
10209 size = 12;
10210 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10211 }
10212 }
10213 else
10214 {
10215 bfd_vma r2off = get_r2off (info, stub_entry);
10216
10217 if (r2off == 0)
10218 {
10219 htab->stub_error = TRUE;
10220 return FALSE;
10221 }
10222
10223 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10224 loc += 4;
10225 size = 20;
10226 if (PPC_HA (off) != 0)
10227 {
10228 size += 4;
10229 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10230 loc += 4;
10231 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10232 loc += 4;
10233 }
10234 else
10235 {
10236 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10237 loc += 4;
10238 }
10239
10240 if (PPC_HA (r2off) != 0)
10241 {
10242 size += 4;
10243 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10244 loc += 4;
10245 }
10246 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10247 }
10248 loc += 4;
10249 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10250 loc += 4;
10251 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10252 break;
10253
10254 case ppc_stub_plt_call:
10255 case ppc_stub_plt_call_r2save:
10256 if (stub_entry->h != NULL
10257 && stub_entry->h->is_func_descriptor
10258 && stub_entry->h->oh != NULL)
10259 {
10260 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10261
10262 /* If the old-ABI "dot-symbol" is undefined make it weak so
10263 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10264 FIXME: We used to define the symbol on one of the call
10265 stubs instead, which is why we test symbol section id
10266 against htab->top_id in various places. Likely all
10267 these checks could now disappear. */
10268 if (fh->elf.root.type == bfd_link_hash_undefined)
10269 fh->elf.root.type = bfd_link_hash_undefweak;
10270 /* Stop undo_symbol_twiddle changing it back to undefined. */
10271 fh->was_undefined = 0;
10272 }
10273
10274 /* Now build the stub. */
10275 dest = stub_entry->plt_ent->plt.offset & ~1;
10276 if (dest >= (bfd_vma) -2)
10277 abort ();
10278
10279 plt = htab->plt;
10280 if (!htab->elf.dynamic_sections_created
10281 || stub_entry->h == NULL
10282 || stub_entry->h->elf.dynindx == -1)
10283 plt = htab->iplt;
10284
10285 dest += plt->output_offset + plt->output_section->vma;
10286
10287 if (stub_entry->h == NULL
10288 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10289 {
10290 Elf_Internal_Rela rela;
10291 bfd_byte *rl;
10292
10293 rela.r_offset = dest;
10294 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10295 rela.r_addend = (stub_entry->target_value
10296 + stub_entry->target_section->output_offset
10297 + stub_entry->target_section->output_section->vma);
10298
10299 rl = (htab->reliplt->contents
10300 + (htab->reliplt->reloc_count++
10301 * sizeof (Elf64_External_Rela)));
10302 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10303 stub_entry->plt_ent->plt.offset |= 1;
10304 }
10305
10306 off = (dest
10307 - elf_gp (plt->output_section->owner)
10308 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10309
10310 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10311 {
10312 info->callbacks->einfo
10313 (_("%P: linkage table error against `%T'\n"),
10314 stub_entry->h != NULL
10315 ? stub_entry->h->elf.root.root.string
10316 : "<local sym>");
10317 bfd_set_error (bfd_error_bad_value);
10318 htab->stub_error = TRUE;
10319 return FALSE;
10320 }
10321
10322 if (htab->plt_stub_align != 0)
10323 {
10324 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10325
10326 stub_entry->stub_sec->size += pad;
10327 stub_entry->stub_offset = stub_entry->stub_sec->size;
10328 loc += pad;
10329 }
10330
10331 r = NULL;
10332 if (info->emitrelocations)
10333 {
10334 r = get_relocs (stub_entry->stub_sec,
10335 (2
10336 + (PPC_HA (off) != 0)
10337 + (htab->plt_static_chain
10338 && PPC_HA (off + 16) == PPC_HA (off))));
10339 if (r == NULL)
10340 return FALSE;
10341 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10342 if (bfd_big_endian (info->output_bfd))
10343 r[0].r_offset += 2;
10344 r[0].r_addend = dest;
10345 }
10346 if (stub_entry->h != NULL
10347 && (stub_entry->h == htab->tls_get_addr_fd
10348 || stub_entry->h == htab->tls_get_addr)
10349 && !htab->no_tls_get_addr_opt)
10350 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10351 else
10352 p = build_plt_stub (htab, stub_entry, loc, off, r);
10353 size = p - loc;
10354 break;
10355
10356 default:
10357 BFD_FAIL ();
10358 return FALSE;
10359 }
10360
10361 stub_entry->stub_sec->size += size;
10362
10363 if (htab->emit_stub_syms)
10364 {
10365 struct elf_link_hash_entry *h;
10366 size_t len1, len2;
10367 char *name;
10368 const char *const stub_str[] = { "long_branch",
10369 "long_branch_r2off",
10370 "plt_branch",
10371 "plt_branch_r2off",
10372 "plt_call",
10373 "plt_call" };
10374
10375 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10376 len2 = strlen (stub_entry->root.string);
10377 name = bfd_malloc (len1 + len2 + 2);
10378 if (name == NULL)
10379 return FALSE;
10380 memcpy (name, stub_entry->root.string, 9);
10381 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10382 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10383 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10384 if (h == NULL)
10385 return FALSE;
10386 if (h->root.type == bfd_link_hash_new)
10387 {
10388 h->root.type = bfd_link_hash_defined;
10389 h->root.u.def.section = stub_entry->stub_sec;
10390 h->root.u.def.value = stub_entry->stub_offset;
10391 h->ref_regular = 1;
10392 h->def_regular = 1;
10393 h->ref_regular_nonweak = 1;
10394 h->forced_local = 1;
10395 h->non_elf = 0;
10396 }
10397 }
10398
10399 return TRUE;
10400 }
10401
10402 /* As above, but don't actually build the stub. Just bump offset so
10403 we know stub section sizes, and select plt_branch stubs where
10404 long_branch stubs won't do. */
10405
10406 static bfd_boolean
10407 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10408 {
10409 struct ppc_stub_hash_entry *stub_entry;
10410 struct bfd_link_info *info;
10411 struct ppc_link_hash_table *htab;
10412 bfd_vma off;
10413 int size;
10414
10415 /* Massage our args to the form they really have. */
10416 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10417 info = in_arg;
10418
10419 htab = ppc_hash_table (info);
10420 if (htab == NULL)
10421 return FALSE;
10422
10423 if (stub_entry->stub_type == ppc_stub_plt_call
10424 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10425 {
10426 asection *plt;
10427 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10428 if (off >= (bfd_vma) -2)
10429 abort ();
10430 plt = htab->plt;
10431 if (!htab->elf.dynamic_sections_created
10432 || stub_entry->h == NULL
10433 || stub_entry->h->elf.dynindx == -1)
10434 plt = htab->iplt;
10435 off += (plt->output_offset
10436 + plt->output_section->vma
10437 - elf_gp (plt->output_section->owner)
10438 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10439
10440 size = plt_stub_size (htab, stub_entry, off);
10441 if (htab->plt_stub_align)
10442 size += plt_stub_pad (htab, stub_entry, off);
10443 if (info->emitrelocations)
10444 {
10445 stub_entry->stub_sec->reloc_count
10446 += (2
10447 + (PPC_HA (off) != 0)
10448 + (htab->plt_static_chain
10449 && PPC_HA (off + 16) == PPC_HA (off)));
10450 stub_entry->stub_sec->flags |= SEC_RELOC;
10451 }
10452 }
10453 else
10454 {
10455 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10456 variants. */
10457 bfd_vma r2off = 0;
10458
10459 off = (stub_entry->target_value
10460 + stub_entry->target_section->output_offset
10461 + stub_entry->target_section->output_section->vma);
10462 off -= (stub_entry->stub_sec->size
10463 + stub_entry->stub_sec->output_offset
10464 + stub_entry->stub_sec->output_section->vma);
10465
10466 /* Reset the stub type from the plt variant in case we now
10467 can reach with a shorter stub. */
10468 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10469 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10470
10471 size = 4;
10472 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10473 {
10474 r2off = get_r2off (info, stub_entry);
10475 if (r2off == 0)
10476 {
10477 htab->stub_error = TRUE;
10478 return FALSE;
10479 }
10480 size = 12;
10481 if (PPC_HA (r2off) != 0)
10482 size = 16;
10483 off -= size - 4;
10484 }
10485
10486 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10487 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10488 {
10489 struct ppc_branch_hash_entry *br_entry;
10490
10491 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10492 stub_entry->root.string + 9,
10493 TRUE, FALSE);
10494 if (br_entry == NULL)
10495 {
10496 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10497 stub_entry->root.string);
10498 htab->stub_error = TRUE;
10499 return FALSE;
10500 }
10501
10502 if (br_entry->iter != htab->stub_iteration)
10503 {
10504 br_entry->iter = htab->stub_iteration;
10505 br_entry->offset = htab->brlt->size;
10506 htab->brlt->size += 8;
10507
10508 if (htab->relbrlt != NULL)
10509 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10510 else if (info->emitrelocations)
10511 {
10512 htab->brlt->reloc_count += 1;
10513 htab->brlt->flags |= SEC_RELOC;
10514 }
10515 }
10516
10517 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10518 off = (br_entry->offset
10519 + htab->brlt->output_offset
10520 + htab->brlt->output_section->vma
10521 - elf_gp (htab->brlt->output_section->owner)
10522 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10523
10524 if (info->emitrelocations)
10525 {
10526 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10527 stub_entry->stub_sec->flags |= SEC_RELOC;
10528 }
10529
10530 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10531 {
10532 size = 12;
10533 if (PPC_HA (off) != 0)
10534 size = 16;
10535 }
10536 else
10537 {
10538 size = 20;
10539 if (PPC_HA (off) != 0)
10540 size += 4;
10541
10542 if (PPC_HA (r2off) != 0)
10543 size += 4;
10544 }
10545 }
10546 else if (info->emitrelocations)
10547 {
10548 stub_entry->stub_sec->reloc_count += 1;
10549 stub_entry->stub_sec->flags |= SEC_RELOC;
10550 }
10551 }
10552
10553 stub_entry->stub_sec->size += size;
10554 return TRUE;
10555 }
10556
10557 /* Set up various things so that we can make a list of input sections
10558 for each output section included in the link. Returns -1 on error,
10559 0 when no stubs will be needed, and 1 on success. */
10560
10561 int
10562 ppc64_elf_setup_section_lists
10563 (struct bfd_link_info *info,
10564 asection *(*add_stub_section) (const char *, asection *),
10565 void (*layout_sections_again) (void))
10566 {
10567 bfd *input_bfd;
10568 int top_id, top_index, id;
10569 asection *section;
10570 asection **input_list;
10571 bfd_size_type amt;
10572 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10573
10574 if (htab == NULL)
10575 return -1;
10576 /* Stash our params away. */
10577 htab->add_stub_section = add_stub_section;
10578 htab->layout_sections_again = layout_sections_again;
10579
10580 /* Find the top input section id. */
10581 for (input_bfd = info->input_bfds, top_id = 3;
10582 input_bfd != NULL;
10583 input_bfd = input_bfd->link_next)
10584 {
10585 for (section = input_bfd->sections;
10586 section != NULL;
10587 section = section->next)
10588 {
10589 if (top_id < section->id)
10590 top_id = section->id;
10591 }
10592 }
10593
10594 htab->top_id = top_id;
10595 amt = sizeof (struct map_stub) * (top_id + 1);
10596 htab->stub_group = bfd_zmalloc (amt);
10597 if (htab->stub_group == NULL)
10598 return -1;
10599
10600 /* Set toc_off for com, und, abs and ind sections. */
10601 for (id = 0; id < 3; id++)
10602 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10603
10604 /* We can't use output_bfd->section_count here to find the top output
10605 section index as some sections may have been removed, and
10606 strip_excluded_output_sections doesn't renumber the indices. */
10607 for (section = info->output_bfd->sections, top_index = 0;
10608 section != NULL;
10609 section = section->next)
10610 {
10611 if (top_index < section->index)
10612 top_index = section->index;
10613 }
10614
10615 htab->top_index = top_index;
10616 amt = sizeof (asection *) * (top_index + 1);
10617 input_list = bfd_zmalloc (amt);
10618 htab->input_list = input_list;
10619 if (input_list == NULL)
10620 return -1;
10621
10622 return 1;
10623 }
10624
10625 /* Set up for first pass at multitoc partitioning. */
10626
10627 void
10628 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10629 {
10630 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10631
10632 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
10633 htab->toc_bfd = NULL;
10634 htab->toc_first_sec = NULL;
10635 }
10636
10637 /* The linker repeatedly calls this function for each TOC input section
10638 and linker generated GOT section. Group input bfds such that the toc
10639 within a group is less than 64k in size. */
10640
10641 bfd_boolean
10642 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10643 {
10644 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10645 bfd_vma addr, off, limit;
10646
10647 if (htab == NULL)
10648 return FALSE;
10649
10650 if (!htab->second_toc_pass)
10651 {
10652 /* Keep track of the first .toc or .got section for this input bfd. */
10653 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10654
10655 if (new_bfd)
10656 {
10657 htab->toc_bfd = isec->owner;
10658 htab->toc_first_sec = isec;
10659 }
10660
10661 addr = isec->output_offset + isec->output_section->vma;
10662 off = addr - htab->toc_curr;
10663 limit = 0x80008000;
10664 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10665 limit = 0x10000;
10666 if (off + isec->size > limit)
10667 {
10668 addr = (htab->toc_first_sec->output_offset
10669 + htab->toc_first_sec->output_section->vma);
10670 htab->toc_curr = addr;
10671 }
10672
10673 /* toc_curr is the base address of this toc group. Set elf_gp
10674 for the input section to be the offset relative to the
10675 output toc base plus 0x8000. Making the input elf_gp an
10676 offset allows us to move the toc as a whole without
10677 recalculating input elf_gp. */
10678 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10679 off += TOC_BASE_OFF;
10680
10681 /* Die if someone uses a linker script that doesn't keep input
10682 file .toc and .got together. */
10683 if (new_bfd
10684 && elf_gp (isec->owner) != 0
10685 && elf_gp (isec->owner) != off)
10686 return FALSE;
10687
10688 elf_gp (isec->owner) = off;
10689 return TRUE;
10690 }
10691
10692 /* During the second pass toc_first_sec points to the start of
10693 a toc group, and toc_curr is used to track the old elf_gp.
10694 We use toc_bfd to ensure we only look at each bfd once. */
10695 if (htab->toc_bfd == isec->owner)
10696 return TRUE;
10697 htab->toc_bfd = isec->owner;
10698
10699 if (htab->toc_first_sec == NULL
10700 || htab->toc_curr != elf_gp (isec->owner))
10701 {
10702 htab->toc_curr = elf_gp (isec->owner);
10703 htab->toc_first_sec = isec;
10704 }
10705 addr = (htab->toc_first_sec->output_offset
10706 + htab->toc_first_sec->output_section->vma);
10707 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10708 elf_gp (isec->owner) = off;
10709
10710 return TRUE;
10711 }
10712
10713 /* Called via elf_link_hash_traverse to merge GOT entries for global
10714 symbol H. */
10715
10716 static bfd_boolean
10717 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10718 {
10719 if (h->root.type == bfd_link_hash_indirect)
10720 return TRUE;
10721
10722 merge_got_entries (&h->got.glist);
10723
10724 return TRUE;
10725 }
10726
10727 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10728 symbol H. */
10729
10730 static bfd_boolean
10731 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10732 {
10733 struct got_entry *gent;
10734
10735 if (h->root.type == bfd_link_hash_indirect)
10736 return TRUE;
10737
10738 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10739 if (!gent->is_indirect)
10740 allocate_got (h, (struct bfd_link_info *) inf, gent);
10741 return TRUE;
10742 }
10743
10744 /* Called on the first multitoc pass after the last call to
10745 ppc64_elf_next_toc_section. This function removes duplicate GOT
10746 entries. */
10747
10748 bfd_boolean
10749 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10750 {
10751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10752 struct bfd *ibfd, *ibfd2;
10753 bfd_boolean done_something;
10754
10755 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10756
10757 if (!htab->do_multi_toc)
10758 return FALSE;
10759
10760 /* Merge global sym got entries within a toc group. */
10761 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10762
10763 /* And tlsld_got. */
10764 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10765 {
10766 struct got_entry *ent, *ent2;
10767
10768 if (!is_ppc64_elf (ibfd))
10769 continue;
10770
10771 ent = ppc64_tlsld_got (ibfd);
10772 if (!ent->is_indirect
10773 && ent->got.offset != (bfd_vma) -1)
10774 {
10775 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10776 {
10777 if (!is_ppc64_elf (ibfd2))
10778 continue;
10779
10780 ent2 = ppc64_tlsld_got (ibfd2);
10781 if (!ent2->is_indirect
10782 && ent2->got.offset != (bfd_vma) -1
10783 && elf_gp (ibfd2) == elf_gp (ibfd))
10784 {
10785 ent2->is_indirect = TRUE;
10786 ent2->got.ent = ent;
10787 }
10788 }
10789 }
10790 }
10791
10792 /* Zap sizes of got sections. */
10793 htab->reliplt->rawsize = htab->reliplt->size;
10794 htab->reliplt->size -= htab->got_reli_size;
10795 htab->got_reli_size = 0;
10796
10797 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10798 {
10799 asection *got, *relgot;
10800
10801 if (!is_ppc64_elf (ibfd))
10802 continue;
10803
10804 got = ppc64_elf_tdata (ibfd)->got;
10805 if (got != NULL)
10806 {
10807 got->rawsize = got->size;
10808 got->size = 0;
10809 relgot = ppc64_elf_tdata (ibfd)->relgot;
10810 relgot->rawsize = relgot->size;
10811 relgot->size = 0;
10812 }
10813 }
10814
10815 /* Now reallocate the got, local syms first. We don't need to
10816 allocate section contents again since we never increase size. */
10817 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10818 {
10819 struct got_entry **lgot_ents;
10820 struct got_entry **end_lgot_ents;
10821 struct plt_entry **local_plt;
10822 struct plt_entry **end_local_plt;
10823 unsigned char *lgot_masks;
10824 bfd_size_type locsymcount;
10825 Elf_Internal_Shdr *symtab_hdr;
10826 asection *s;
10827
10828 if (!is_ppc64_elf (ibfd))
10829 continue;
10830
10831 lgot_ents = elf_local_got_ents (ibfd);
10832 if (!lgot_ents)
10833 continue;
10834
10835 symtab_hdr = &elf_symtab_hdr (ibfd);
10836 locsymcount = symtab_hdr->sh_info;
10837 end_lgot_ents = lgot_ents + locsymcount;
10838 local_plt = (struct plt_entry **) end_lgot_ents;
10839 end_local_plt = local_plt + locsymcount;
10840 lgot_masks = (unsigned char *) end_local_plt;
10841 s = ppc64_elf_tdata (ibfd)->got;
10842 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10843 {
10844 struct got_entry *ent;
10845
10846 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10847 {
10848 unsigned int ent_size = 8;
10849 unsigned int rel_size = sizeof (Elf64_External_Rela);
10850
10851 ent->got.offset = s->size;
10852 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10853 {
10854 ent_size *= 2;
10855 rel_size *= 2;
10856 }
10857 s->size += ent_size;
10858 if ((*lgot_masks & PLT_IFUNC) != 0)
10859 {
10860 htab->reliplt->size += rel_size;
10861 htab->got_reli_size += rel_size;
10862 }
10863 else if (info->shared)
10864 {
10865 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10866 srel->size += rel_size;
10867 }
10868 }
10869 }
10870 }
10871
10872 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10873
10874 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10875 {
10876 struct got_entry *ent;
10877
10878 if (!is_ppc64_elf (ibfd))
10879 continue;
10880
10881 ent = ppc64_tlsld_got (ibfd);
10882 if (!ent->is_indirect
10883 && ent->got.offset != (bfd_vma) -1)
10884 {
10885 asection *s = ppc64_elf_tdata (ibfd)->got;
10886 ent->got.offset = s->size;
10887 s->size += 16;
10888 if (info->shared)
10889 {
10890 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10891 srel->size += sizeof (Elf64_External_Rela);
10892 }
10893 }
10894 }
10895
10896 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10897 if (!done_something)
10898 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10899 {
10900 asection *got;
10901
10902 if (!is_ppc64_elf (ibfd))
10903 continue;
10904
10905 got = ppc64_elf_tdata (ibfd)->got;
10906 if (got != NULL)
10907 {
10908 done_something = got->rawsize != got->size;
10909 if (done_something)
10910 break;
10911 }
10912 }
10913
10914 if (done_something)
10915 (*htab->layout_sections_again) ();
10916
10917 /* Set up for second pass over toc sections to recalculate elf_gp
10918 on input sections. */
10919 htab->toc_bfd = NULL;
10920 htab->toc_first_sec = NULL;
10921 htab->second_toc_pass = TRUE;
10922 return done_something;
10923 }
10924
10925 /* Called after second pass of multitoc partitioning. */
10926
10927 void
10928 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10929 {
10930 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10931
10932 /* After the second pass, toc_curr tracks the TOC offset used
10933 for code sections below in ppc64_elf_next_input_section. */
10934 htab->toc_curr = TOC_BASE_OFF;
10935 }
10936
10937 /* No toc references were found in ISEC. If the code in ISEC makes no
10938 calls, then there's no need to use toc adjusting stubs when branching
10939 into ISEC. Actually, indirect calls from ISEC are OK as they will
10940 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10941 needed, and 2 if a cyclical call-graph was found but no other reason
10942 for a stub was detected. If called from the top level, a return of
10943 2 means the same as a return of 0. */
10944
10945 static int
10946 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10947 {
10948 int ret;
10949
10950 /* Mark this section as checked. */
10951 isec->call_check_done = 1;
10952
10953 /* We know none of our code bearing sections will need toc stubs. */
10954 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10955 return 0;
10956
10957 if (isec->size == 0)
10958 return 0;
10959
10960 if (isec->output_section == NULL)
10961 return 0;
10962
10963 ret = 0;
10964 if (isec->reloc_count != 0)
10965 {
10966 Elf_Internal_Rela *relstart, *rel;
10967 Elf_Internal_Sym *local_syms;
10968 struct ppc_link_hash_table *htab;
10969
10970 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10971 info->keep_memory);
10972 if (relstart == NULL)
10973 return -1;
10974
10975 /* Look for branches to outside of this section. */
10976 local_syms = NULL;
10977 htab = ppc_hash_table (info);
10978 if (htab == NULL)
10979 return -1;
10980
10981 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10982 {
10983 enum elf_ppc64_reloc_type r_type;
10984 unsigned long r_symndx;
10985 struct elf_link_hash_entry *h;
10986 struct ppc_link_hash_entry *eh;
10987 Elf_Internal_Sym *sym;
10988 asection *sym_sec;
10989 struct _opd_sec_data *opd;
10990 bfd_vma sym_value;
10991 bfd_vma dest;
10992
10993 r_type = ELF64_R_TYPE (rel->r_info);
10994 if (r_type != R_PPC64_REL24
10995 && r_type != R_PPC64_REL14
10996 && r_type != R_PPC64_REL14_BRTAKEN
10997 && r_type != R_PPC64_REL14_BRNTAKEN)
10998 continue;
10999
11000 r_symndx = ELF64_R_SYM (rel->r_info);
11001 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11002 isec->owner))
11003 {
11004 ret = -1;
11005 break;
11006 }
11007
11008 /* Calls to dynamic lib functions go through a plt call stub
11009 that uses r2. */
11010 eh = (struct ppc_link_hash_entry *) h;
11011 if (eh != NULL
11012 && (eh->elf.plt.plist != NULL
11013 || (eh->oh != NULL
11014 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11015 {
11016 ret = 1;
11017 break;
11018 }
11019
11020 if (sym_sec == NULL)
11021 /* Ignore other undefined symbols. */
11022 continue;
11023
11024 /* Assume branches to other sections not included in the
11025 link need stubs too, to cover -R and absolute syms. */
11026 if (sym_sec->output_section == NULL)
11027 {
11028 ret = 1;
11029 break;
11030 }
11031
11032 if (h == NULL)
11033 sym_value = sym->st_value;
11034 else
11035 {
11036 if (h->root.type != bfd_link_hash_defined
11037 && h->root.type != bfd_link_hash_defweak)
11038 abort ();
11039 sym_value = h->root.u.def.value;
11040 }
11041 sym_value += rel->r_addend;
11042
11043 /* If this branch reloc uses an opd sym, find the code section. */
11044 opd = get_opd_info (sym_sec);
11045 if (opd != NULL)
11046 {
11047 if (h == NULL && opd->adjust != NULL)
11048 {
11049 long adjust;
11050
11051 adjust = opd->adjust[sym->st_value / 8];
11052 if (adjust == -1)
11053 /* Assume deleted functions won't ever be called. */
11054 continue;
11055 sym_value += adjust;
11056 }
11057
11058 dest = opd_entry_value (sym_sec, sym_value,
11059 &sym_sec, NULL, FALSE);
11060 if (dest == (bfd_vma) -1)
11061 continue;
11062 }
11063 else
11064 dest = (sym_value
11065 + sym_sec->output_offset
11066 + sym_sec->output_section->vma);
11067
11068 /* Ignore branch to self. */
11069 if (sym_sec == isec)
11070 continue;
11071
11072 /* If the called function uses the toc, we need a stub. */
11073 if (sym_sec->has_toc_reloc
11074 || sym_sec->makes_toc_func_call)
11075 {
11076 ret = 1;
11077 break;
11078 }
11079
11080 /* Assume any branch that needs a long branch stub might in fact
11081 need a plt_branch stub. A plt_branch stub uses r2. */
11082 else if (dest - (isec->output_offset
11083 + isec->output_section->vma
11084 + rel->r_offset) + (1 << 25) >= (2 << 25))
11085 {
11086 ret = 1;
11087 break;
11088 }
11089
11090 /* If calling back to a section in the process of being
11091 tested, we can't say for sure that no toc adjusting stubs
11092 are needed, so don't return zero. */
11093 else if (sym_sec->call_check_in_progress)
11094 ret = 2;
11095
11096 /* Branches to another section that itself doesn't have any TOC
11097 references are OK. Recursively call ourselves to check. */
11098 else if (!sym_sec->call_check_done)
11099 {
11100 int recur;
11101
11102 /* Mark current section as indeterminate, so that other
11103 sections that call back to current won't be marked as
11104 known. */
11105 isec->call_check_in_progress = 1;
11106 recur = toc_adjusting_stub_needed (info, sym_sec);
11107 isec->call_check_in_progress = 0;
11108
11109 if (recur != 0)
11110 {
11111 ret = recur;
11112 if (recur != 2)
11113 break;
11114 }
11115 }
11116 }
11117
11118 if (local_syms != NULL
11119 && (elf_symtab_hdr (isec->owner).contents
11120 != (unsigned char *) local_syms))
11121 free (local_syms);
11122 if (elf_section_data (isec)->relocs != relstart)
11123 free (relstart);
11124 }
11125
11126 if ((ret & 1) == 0
11127 && isec->map_head.s != NULL
11128 && (strcmp (isec->output_section->name, ".init") == 0
11129 || strcmp (isec->output_section->name, ".fini") == 0))
11130 {
11131 if (isec->map_head.s->has_toc_reloc
11132 || isec->map_head.s->makes_toc_func_call)
11133 ret = 1;
11134 else if (!isec->map_head.s->call_check_done)
11135 {
11136 int recur;
11137 isec->call_check_in_progress = 1;
11138 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11139 isec->call_check_in_progress = 0;
11140 if (recur != 0)
11141 ret = recur;
11142 }
11143 }
11144
11145 if (ret == 1)
11146 isec->makes_toc_func_call = 1;
11147
11148 return ret;
11149 }
11150
11151 /* The linker repeatedly calls this function for each input section,
11152 in the order that input sections are linked into output sections.
11153 Build lists of input sections to determine groupings between which
11154 we may insert linker stubs. */
11155
11156 bfd_boolean
11157 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11158 {
11159 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11160
11161 if (htab == NULL)
11162 return FALSE;
11163
11164 if ((isec->output_section->flags & SEC_CODE) != 0
11165 && isec->output_section->index <= htab->top_index)
11166 {
11167 asection **list = htab->input_list + isec->output_section->index;
11168 /* Steal the link_sec pointer for our list. */
11169 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11170 /* This happens to make the list in reverse order,
11171 which is what we want. */
11172 PREV_SEC (isec) = *list;
11173 *list = isec;
11174 }
11175
11176 if (htab->multi_toc_needed)
11177 {
11178 /* If a code section has a function that uses the TOC then we need
11179 to use the right TOC (obviously). Also, make sure that .opd gets
11180 the correct TOC value for R_PPC64_TOC relocs that don't have or
11181 can't find their function symbol (shouldn't ever happen now).
11182 Also specially treat .fixup for the linux kernel. .fixup
11183 contains branches, but only back to the function that hit an
11184 exception. */
11185 if (isec->has_toc_reloc
11186 || (isec->flags & SEC_CODE) == 0
11187 || strcmp (isec->name, ".fixup") == 0)
11188 {
11189 if (elf_gp (isec->owner) != 0)
11190 htab->toc_curr = elf_gp (isec->owner);
11191 }
11192 else
11193 {
11194 if (!isec->call_check_done
11195 && toc_adjusting_stub_needed (info, isec) < 0)
11196 return FALSE;
11197 /* If we make a local call from this section, ie. a branch
11198 without a following nop, then we have no place to put a
11199 toc restoring insn. We must use the same toc group as
11200 the callee.
11201 Testing makes_toc_func_call actually tests for *any*
11202 calls to functions that need a good toc pointer. A more
11203 precise test would be better, as this one will set
11204 incorrect values for pasted .init/.fini fragments.
11205 (Fixed later in check_pasted_section.) */
11206 if (isec->makes_toc_func_call
11207 && elf_gp (isec->owner) != 0)
11208 htab->toc_curr = elf_gp (isec->owner);
11209 }
11210 }
11211
11212 /* Functions that don't use the TOC can belong in any TOC group.
11213 Use the last TOC base. */
11214 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11215 return TRUE;
11216 }
11217
11218 /* Check that all .init and .fini sections use the same toc, if they
11219 have toc relocs. */
11220
11221 static bfd_boolean
11222 check_pasted_section (struct bfd_link_info *info, const char *name)
11223 {
11224 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11225
11226 if (o != NULL)
11227 {
11228 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11229 bfd_vma toc_off = 0;
11230 asection *i;
11231
11232 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11233 if (i->has_toc_reloc)
11234 {
11235 if (toc_off == 0)
11236 toc_off = htab->stub_group[i->id].toc_off;
11237 else if (toc_off != htab->stub_group[i->id].toc_off)
11238 return FALSE;
11239 }
11240
11241 if (toc_off == 0)
11242 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11243 if (i->makes_toc_func_call)
11244 {
11245 toc_off = htab->stub_group[i->id].toc_off;
11246 break;
11247 }
11248
11249 /* Make sure the whole pasted function uses the same toc offset. */
11250 if (toc_off != 0)
11251 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11252 htab->stub_group[i->id].toc_off = toc_off;
11253 }
11254 return TRUE;
11255 }
11256
11257 bfd_boolean
11258 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11259 {
11260 return (check_pasted_section (info, ".init")
11261 & check_pasted_section (info, ".fini"));
11262 }
11263
11264 /* See whether we can group stub sections together. Grouping stub
11265 sections may result in fewer stubs. More importantly, we need to
11266 put all .init* and .fini* stubs at the beginning of the .init or
11267 .fini output sections respectively, because glibc splits the
11268 _init and _fini functions into multiple parts. Putting a stub in
11269 the middle of a function is not a good idea. */
11270
11271 static void
11272 group_sections (struct ppc_link_hash_table *htab,
11273 bfd_size_type stub_group_size,
11274 bfd_boolean stubs_always_before_branch)
11275 {
11276 asection **list;
11277 bfd_size_type stub14_group_size;
11278 bfd_boolean suppress_size_errors;
11279
11280 suppress_size_errors = FALSE;
11281 stub14_group_size = stub_group_size;
11282 if (stub_group_size == 1)
11283 {
11284 /* Default values. */
11285 if (stubs_always_before_branch)
11286 {
11287 stub_group_size = 0x1e00000;
11288 stub14_group_size = 0x7800;
11289 }
11290 else
11291 {
11292 stub_group_size = 0x1c00000;
11293 stub14_group_size = 0x7000;
11294 }
11295 suppress_size_errors = TRUE;
11296 }
11297
11298 list = htab->input_list + htab->top_index;
11299 do
11300 {
11301 asection *tail = *list;
11302 while (tail != NULL)
11303 {
11304 asection *curr;
11305 asection *prev;
11306 bfd_size_type total;
11307 bfd_boolean big_sec;
11308 bfd_vma curr_toc;
11309
11310 curr = tail;
11311 total = tail->size;
11312 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11313 && ppc64_elf_section_data (tail)->has_14bit_branch
11314 ? stub14_group_size : stub_group_size);
11315 if (big_sec && !suppress_size_errors)
11316 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11317 tail->owner, tail);
11318 curr_toc = htab->stub_group[tail->id].toc_off;
11319
11320 while ((prev = PREV_SEC (curr)) != NULL
11321 && ((total += curr->output_offset - prev->output_offset)
11322 < (ppc64_elf_section_data (prev) != NULL
11323 && ppc64_elf_section_data (prev)->has_14bit_branch
11324 ? stub14_group_size : stub_group_size))
11325 && htab->stub_group[prev->id].toc_off == curr_toc)
11326 curr = prev;
11327
11328 /* OK, the size from the start of CURR to the end is less
11329 than stub_group_size and thus can be handled by one stub
11330 section. (or the tail section is itself larger than
11331 stub_group_size, in which case we may be toast.) We
11332 should really be keeping track of the total size of stubs
11333 added here, as stubs contribute to the final output
11334 section size. That's a little tricky, and this way will
11335 only break if stubs added make the total size more than
11336 2^25, ie. for the default stub_group_size, if stubs total
11337 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11338 do
11339 {
11340 prev = PREV_SEC (tail);
11341 /* Set up this stub group. */
11342 htab->stub_group[tail->id].link_sec = curr;
11343 }
11344 while (tail != curr && (tail = prev) != NULL);
11345
11346 /* But wait, there's more! Input sections up to stub_group_size
11347 bytes before the stub section can be handled by it too.
11348 Don't do this if we have a really large section after the
11349 stubs, as adding more stubs increases the chance that
11350 branches may not reach into the stub section. */
11351 if (!stubs_always_before_branch && !big_sec)
11352 {
11353 total = 0;
11354 while (prev != NULL
11355 && ((total += tail->output_offset - prev->output_offset)
11356 < (ppc64_elf_section_data (prev) != NULL
11357 && ppc64_elf_section_data (prev)->has_14bit_branch
11358 ? stub14_group_size : stub_group_size))
11359 && htab->stub_group[prev->id].toc_off == curr_toc)
11360 {
11361 tail = prev;
11362 prev = PREV_SEC (tail);
11363 htab->stub_group[tail->id].link_sec = curr;
11364 }
11365 }
11366 tail = prev;
11367 }
11368 }
11369 while (list-- != htab->input_list);
11370 free (htab->input_list);
11371 #undef PREV_SEC
11372 }
11373
11374 static const unsigned char glink_eh_frame_cie[] =
11375 {
11376 0, 0, 0, 16, /* length. */
11377 0, 0, 0, 0, /* id. */
11378 1, /* CIE version. */
11379 'z', 'R', 0, /* Augmentation string. */
11380 4, /* Code alignment. */
11381 0x78, /* Data alignment. */
11382 65, /* RA reg. */
11383 1, /* Augmentation size. */
11384 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11385 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11386 };
11387
11388 /* Stripping output sections is normally done before dynamic section
11389 symbols have been allocated. This function is called later, and
11390 handles cases like htab->brlt which is mapped to its own output
11391 section. */
11392
11393 static void
11394 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11395 {
11396 if (isec->size == 0
11397 && isec->output_section->size == 0
11398 && !(isec->output_section->flags & SEC_KEEP)
11399 && !bfd_section_removed_from_list (info->output_bfd,
11400 isec->output_section)
11401 && elf_section_data (isec->output_section)->dynindx == 0)
11402 {
11403 isec->output_section->flags |= SEC_EXCLUDE;
11404 bfd_section_list_remove (info->output_bfd, isec->output_section);
11405 info->output_bfd->section_count--;
11406 }
11407 }
11408
11409 /* Determine and set the size of the stub section for a final link.
11410
11411 The basic idea here is to examine all the relocations looking for
11412 PC-relative calls to a target that is unreachable with a "bl"
11413 instruction. */
11414
11415 bfd_boolean
11416 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11417 bfd_boolean plt_static_chain, int plt_thread_safe,
11418 int plt_stub_align)
11419 {
11420 bfd_size_type stub_group_size;
11421 bfd_boolean stubs_always_before_branch;
11422 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11423
11424 if (htab == NULL)
11425 return FALSE;
11426
11427 htab->plt_static_chain = plt_static_chain;
11428 htab->plt_stub_align = plt_stub_align;
11429 if (plt_thread_safe == -1 && !info->executable)
11430 plt_thread_safe = 1;
11431 if (plt_thread_safe == -1)
11432 {
11433 static const char *const thread_starter[] =
11434 {
11435 "pthread_create",
11436 /* libstdc++ */
11437 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11438 /* librt */
11439 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11440 "mq_notify", "create_timer",
11441 /* libanl */
11442 "getaddrinfo_a",
11443 /* libgomp */
11444 "GOMP_parallel_start",
11445 "GOMP_parallel_loop_static_start",
11446 "GOMP_parallel_loop_dynamic_start",
11447 "GOMP_parallel_loop_guided_start",
11448 "GOMP_parallel_loop_runtime_start",
11449 "GOMP_parallel_sections_start",
11450 };
11451 unsigned i;
11452
11453 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11454 {
11455 struct elf_link_hash_entry *h;
11456 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11457 FALSE, FALSE, TRUE);
11458 plt_thread_safe = h != NULL && h->ref_regular;
11459 if (plt_thread_safe)
11460 break;
11461 }
11462 }
11463 htab->plt_thread_safe = plt_thread_safe;
11464 stubs_always_before_branch = group_size < 0;
11465 if (group_size < 0)
11466 stub_group_size = -group_size;
11467 else
11468 stub_group_size = group_size;
11469
11470 group_sections (htab, stub_group_size, stubs_always_before_branch);
11471
11472 while (1)
11473 {
11474 bfd *input_bfd;
11475 unsigned int bfd_indx;
11476 asection *stub_sec;
11477
11478 htab->stub_iteration += 1;
11479
11480 for (input_bfd = info->input_bfds, bfd_indx = 0;
11481 input_bfd != NULL;
11482 input_bfd = input_bfd->link_next, bfd_indx++)
11483 {
11484 Elf_Internal_Shdr *symtab_hdr;
11485 asection *section;
11486 Elf_Internal_Sym *local_syms = NULL;
11487
11488 if (!is_ppc64_elf (input_bfd))
11489 continue;
11490
11491 /* We'll need the symbol table in a second. */
11492 symtab_hdr = &elf_symtab_hdr (input_bfd);
11493 if (symtab_hdr->sh_info == 0)
11494 continue;
11495
11496 /* Walk over each section attached to the input bfd. */
11497 for (section = input_bfd->sections;
11498 section != NULL;
11499 section = section->next)
11500 {
11501 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11502
11503 /* If there aren't any relocs, then there's nothing more
11504 to do. */
11505 if ((section->flags & SEC_RELOC) == 0
11506 || (section->flags & SEC_ALLOC) == 0
11507 || (section->flags & SEC_LOAD) == 0
11508 || (section->flags & SEC_CODE) == 0
11509 || section->reloc_count == 0)
11510 continue;
11511
11512 /* If this section is a link-once section that will be
11513 discarded, then don't create any stubs. */
11514 if (section->output_section == NULL
11515 || section->output_section->owner != info->output_bfd)
11516 continue;
11517
11518 /* Get the relocs. */
11519 internal_relocs
11520 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11521 info->keep_memory);
11522 if (internal_relocs == NULL)
11523 goto error_ret_free_local;
11524
11525 /* Now examine each relocation. */
11526 irela = internal_relocs;
11527 irelaend = irela + section->reloc_count;
11528 for (; irela < irelaend; irela++)
11529 {
11530 enum elf_ppc64_reloc_type r_type;
11531 unsigned int r_indx;
11532 enum ppc_stub_type stub_type;
11533 struct ppc_stub_hash_entry *stub_entry;
11534 asection *sym_sec, *code_sec;
11535 bfd_vma sym_value, code_value;
11536 bfd_vma destination;
11537 bfd_boolean ok_dest;
11538 struct ppc_link_hash_entry *hash;
11539 struct ppc_link_hash_entry *fdh;
11540 struct elf_link_hash_entry *h;
11541 Elf_Internal_Sym *sym;
11542 char *stub_name;
11543 const asection *id_sec;
11544 struct _opd_sec_data *opd;
11545 struct plt_entry *plt_ent;
11546
11547 r_type = ELF64_R_TYPE (irela->r_info);
11548 r_indx = ELF64_R_SYM (irela->r_info);
11549
11550 if (r_type >= R_PPC64_max)
11551 {
11552 bfd_set_error (bfd_error_bad_value);
11553 goto error_ret_free_internal;
11554 }
11555
11556 /* Only look for stubs on branch instructions. */
11557 if (r_type != R_PPC64_REL24
11558 && r_type != R_PPC64_REL14
11559 && r_type != R_PPC64_REL14_BRTAKEN
11560 && r_type != R_PPC64_REL14_BRNTAKEN)
11561 continue;
11562
11563 /* Now determine the call target, its name, value,
11564 section. */
11565 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11566 r_indx, input_bfd))
11567 goto error_ret_free_internal;
11568 hash = (struct ppc_link_hash_entry *) h;
11569
11570 ok_dest = FALSE;
11571 fdh = NULL;
11572 sym_value = 0;
11573 if (hash == NULL)
11574 {
11575 sym_value = sym->st_value;
11576 ok_dest = TRUE;
11577 }
11578 else if (hash->elf.root.type == bfd_link_hash_defined
11579 || hash->elf.root.type == bfd_link_hash_defweak)
11580 {
11581 sym_value = hash->elf.root.u.def.value;
11582 if (sym_sec->output_section != NULL)
11583 ok_dest = TRUE;
11584 }
11585 else if (hash->elf.root.type == bfd_link_hash_undefweak
11586 || hash->elf.root.type == bfd_link_hash_undefined)
11587 {
11588 /* Recognise an old ABI func code entry sym, and
11589 use the func descriptor sym instead if it is
11590 defined. */
11591 if (hash->elf.root.root.string[0] == '.'
11592 && (fdh = lookup_fdh (hash, htab)) != NULL)
11593 {
11594 if (fdh->elf.root.type == bfd_link_hash_defined
11595 || fdh->elf.root.type == bfd_link_hash_defweak)
11596 {
11597 sym_sec = fdh->elf.root.u.def.section;
11598 sym_value = fdh->elf.root.u.def.value;
11599 if (sym_sec->output_section != NULL)
11600 ok_dest = TRUE;
11601 }
11602 else
11603 fdh = NULL;
11604 }
11605 }
11606 else
11607 {
11608 bfd_set_error (bfd_error_bad_value);
11609 goto error_ret_free_internal;
11610 }
11611
11612 destination = 0;
11613 if (ok_dest)
11614 {
11615 sym_value += irela->r_addend;
11616 destination = (sym_value
11617 + sym_sec->output_offset
11618 + sym_sec->output_section->vma);
11619 }
11620
11621 code_sec = sym_sec;
11622 code_value = sym_value;
11623 opd = get_opd_info (sym_sec);
11624 if (opd != NULL)
11625 {
11626 bfd_vma dest;
11627
11628 if (hash == NULL && opd->adjust != NULL)
11629 {
11630 long adjust = opd->adjust[sym_value / 8];
11631 if (adjust == -1)
11632 continue;
11633 code_value += adjust;
11634 sym_value += adjust;
11635 }
11636 dest = opd_entry_value (sym_sec, sym_value,
11637 &code_sec, &code_value, FALSE);
11638 if (dest != (bfd_vma) -1)
11639 {
11640 destination = dest;
11641 if (fdh != NULL)
11642 {
11643 /* Fixup old ABI sym to point at code
11644 entry. */
11645 hash->elf.root.type = bfd_link_hash_defweak;
11646 hash->elf.root.u.def.section = code_sec;
11647 hash->elf.root.u.def.value = code_value;
11648 }
11649 }
11650 }
11651
11652 /* Determine what (if any) linker stub is needed. */
11653 plt_ent = NULL;
11654 stub_type = ppc_type_of_stub (section, irela, &hash,
11655 &plt_ent, destination);
11656
11657 if (stub_type != ppc_stub_plt_call)
11658 {
11659 /* Check whether we need a TOC adjusting stub.
11660 Since the linker pastes together pieces from
11661 different object files when creating the
11662 _init and _fini functions, it may be that a
11663 call to what looks like a local sym is in
11664 fact a call needing a TOC adjustment. */
11665 if (code_sec != NULL
11666 && code_sec->output_section != NULL
11667 && (htab->stub_group[code_sec->id].toc_off
11668 != htab->stub_group[section->id].toc_off)
11669 && (code_sec->has_toc_reloc
11670 || code_sec->makes_toc_func_call))
11671 stub_type = ppc_stub_long_branch_r2off;
11672 }
11673
11674 if (stub_type == ppc_stub_none)
11675 continue;
11676
11677 /* __tls_get_addr calls might be eliminated. */
11678 if (stub_type != ppc_stub_plt_call
11679 && hash != NULL
11680 && (hash == htab->tls_get_addr
11681 || hash == htab->tls_get_addr_fd)
11682 && section->has_tls_reloc
11683 && irela != internal_relocs)
11684 {
11685 /* Get tls info. */
11686 unsigned char *tls_mask;
11687
11688 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11689 irela - 1, input_bfd))
11690 goto error_ret_free_internal;
11691 if (*tls_mask != 0)
11692 continue;
11693 }
11694
11695 if (stub_type == ppc_stub_plt_call
11696 && irela + 1 < irelaend
11697 && irela[1].r_offset == irela->r_offset + 4
11698 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11699 {
11700 if (!tocsave_find (htab, INSERT,
11701 &local_syms, irela + 1, input_bfd))
11702 goto error_ret_free_internal;
11703 }
11704 else if (stub_type == ppc_stub_plt_call)
11705 stub_type = ppc_stub_plt_call_r2save;
11706
11707 /* Support for grouping stub sections. */
11708 id_sec = htab->stub_group[section->id].link_sec;
11709
11710 /* Get the name of this stub. */
11711 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11712 if (!stub_name)
11713 goto error_ret_free_internal;
11714
11715 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11716 stub_name, FALSE, FALSE);
11717 if (stub_entry != NULL)
11718 {
11719 /* The proper stub has already been created. */
11720 free (stub_name);
11721 if (stub_type == ppc_stub_plt_call_r2save)
11722 stub_entry->stub_type = stub_type;
11723 continue;
11724 }
11725
11726 stub_entry = ppc_add_stub (stub_name, section, info);
11727 if (stub_entry == NULL)
11728 {
11729 free (stub_name);
11730 error_ret_free_internal:
11731 if (elf_section_data (section)->relocs == NULL)
11732 free (internal_relocs);
11733 error_ret_free_local:
11734 if (local_syms != NULL
11735 && (symtab_hdr->contents
11736 != (unsigned char *) local_syms))
11737 free (local_syms);
11738 return FALSE;
11739 }
11740
11741 stub_entry->stub_type = stub_type;
11742 if (stub_type != ppc_stub_plt_call
11743 && stub_type != ppc_stub_plt_call_r2save)
11744 {
11745 stub_entry->target_value = code_value;
11746 stub_entry->target_section = code_sec;
11747 }
11748 else
11749 {
11750 stub_entry->target_value = sym_value;
11751 stub_entry->target_section = sym_sec;
11752 }
11753 stub_entry->h = hash;
11754 stub_entry->plt_ent = plt_ent;
11755 stub_entry->addend = irela->r_addend;
11756
11757 if (stub_entry->h != NULL)
11758 htab->stub_globals += 1;
11759 }
11760
11761 /* We're done with the internal relocs, free them. */
11762 if (elf_section_data (section)->relocs != internal_relocs)
11763 free (internal_relocs);
11764 }
11765
11766 if (local_syms != NULL
11767 && symtab_hdr->contents != (unsigned char *) local_syms)
11768 {
11769 if (!info->keep_memory)
11770 free (local_syms);
11771 else
11772 symtab_hdr->contents = (unsigned char *) local_syms;
11773 }
11774 }
11775
11776 /* We may have added some stubs. Find out the new size of the
11777 stub sections. */
11778 for (stub_sec = htab->stub_bfd->sections;
11779 stub_sec != NULL;
11780 stub_sec = stub_sec->next)
11781 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11782 {
11783 stub_sec->rawsize = stub_sec->size;
11784 stub_sec->size = 0;
11785 stub_sec->reloc_count = 0;
11786 stub_sec->flags &= ~SEC_RELOC;
11787 }
11788
11789 htab->brlt->size = 0;
11790 htab->brlt->reloc_count = 0;
11791 htab->brlt->flags &= ~SEC_RELOC;
11792 if (htab->relbrlt != NULL)
11793 htab->relbrlt->size = 0;
11794
11795 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11796
11797 if (info->emitrelocations
11798 && htab->glink != NULL && htab->glink->size != 0)
11799 {
11800 htab->glink->reloc_count = 1;
11801 htab->glink->flags |= SEC_RELOC;
11802 }
11803
11804 if (htab->glink_eh_frame != NULL
11805 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11806 && htab->glink_eh_frame->output_section->size != 0)
11807 {
11808 size_t size = 0, align;
11809
11810 for (stub_sec = htab->stub_bfd->sections;
11811 stub_sec != NULL;
11812 stub_sec = stub_sec->next)
11813 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11814 size += 20;
11815 if (htab->glink != NULL && htab->glink->size != 0)
11816 size += 24;
11817 if (size != 0)
11818 size += sizeof (glink_eh_frame_cie);
11819 align = 1;
11820 align <<= htab->glink_eh_frame->output_section->alignment_power;
11821 align -= 1;
11822 size = (size + align) & ~align;
11823 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11824 htab->glink_eh_frame->size = size;
11825 }
11826
11827 if (htab->plt_stub_align != 0)
11828 for (stub_sec = htab->stub_bfd->sections;
11829 stub_sec != NULL;
11830 stub_sec = stub_sec->next)
11831 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11832 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11833 & (-1 << htab->plt_stub_align));
11834
11835 for (stub_sec = htab->stub_bfd->sections;
11836 stub_sec != NULL;
11837 stub_sec = stub_sec->next)
11838 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11839 && stub_sec->rawsize != stub_sec->size)
11840 break;
11841
11842 /* Exit from this loop when no stubs have been added, and no stubs
11843 have changed size. */
11844 if (stub_sec == NULL
11845 && (htab->glink_eh_frame == NULL
11846 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11847 break;
11848
11849 /* Ask the linker to do its stuff. */
11850 (*htab->layout_sections_again) ();
11851 }
11852
11853 maybe_strip_output (info, htab->brlt);
11854 if (htab->glink_eh_frame != NULL)
11855 maybe_strip_output (info, htab->glink_eh_frame);
11856
11857 return TRUE;
11858 }
11859
11860 /* Called after we have determined section placement. If sections
11861 move, we'll be called again. Provide a value for TOCstart. */
11862
11863 bfd_vma
11864 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
11865 {
11866 asection *s;
11867 bfd_vma TOCstart;
11868
11869 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11870 order. The TOC starts where the first of these sections starts. */
11871 s = bfd_get_section_by_name (obfd, ".got");
11872 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11873 s = bfd_get_section_by_name (obfd, ".toc");
11874 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11875 s = bfd_get_section_by_name (obfd, ".tocbss");
11876 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11877 s = bfd_get_section_by_name (obfd, ".plt");
11878 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11879 {
11880 /* This may happen for
11881 o references to TOC base (SYM@toc / TOC[tc0]) without a
11882 .toc directive
11883 o bad linker script
11884 o --gc-sections and empty TOC sections
11885
11886 FIXME: Warn user? */
11887
11888 /* Look for a likely section. We probably won't even be
11889 using TOCstart. */
11890 for (s = obfd->sections; s != NULL; s = s->next)
11891 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11892 | SEC_EXCLUDE))
11893 == (SEC_ALLOC | SEC_SMALL_DATA))
11894 break;
11895 if (s == NULL)
11896 for (s = obfd->sections; s != NULL; s = s->next)
11897 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11898 == (SEC_ALLOC | SEC_SMALL_DATA))
11899 break;
11900 if (s == NULL)
11901 for (s = obfd->sections; s != NULL; s = s->next)
11902 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11903 == SEC_ALLOC)
11904 break;
11905 if (s == NULL)
11906 for (s = obfd->sections; s != NULL; s = s->next)
11907 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11908 break;
11909 }
11910
11911 TOCstart = 0;
11912 if (s != NULL)
11913 TOCstart = s->output_section->vma + s->output_offset;
11914
11915 _bfd_set_gp_value (obfd, TOCstart);
11916
11917 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
11918 {
11919 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11920
11921 if (htab != NULL
11922 && htab->elf.hgot != NULL)
11923 {
11924 htab->elf.hgot->root.type = bfd_link_hash_defined;
11925 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
11926 htab->elf.hgot->root.u.def.section = s;
11927 }
11928 }
11929 return TOCstart;
11930 }
11931
11932 /* Build all the stubs associated with the current output file.
11933 The stubs are kept in a hash table attached to the main linker
11934 hash table. This function is called via gldelf64ppc_finish. */
11935
11936 bfd_boolean
11937 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11938 struct bfd_link_info *info,
11939 char **stats)
11940 {
11941 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11942 asection *stub_sec;
11943 bfd_byte *p;
11944 int stub_sec_count = 0;
11945
11946 if (htab == NULL)
11947 return FALSE;
11948
11949 htab->emit_stub_syms = emit_stub_syms;
11950
11951 /* Allocate memory to hold the linker stubs. */
11952 for (stub_sec = htab->stub_bfd->sections;
11953 stub_sec != NULL;
11954 stub_sec = stub_sec->next)
11955 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11956 && stub_sec->size != 0)
11957 {
11958 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11959 if (stub_sec->contents == NULL)
11960 return FALSE;
11961 /* We want to check that built size is the same as calculated
11962 size. rawsize is a convenient location to use. */
11963 stub_sec->rawsize = stub_sec->size;
11964 stub_sec->size = 0;
11965 }
11966
11967 if (htab->glink != NULL && htab->glink->size != 0)
11968 {
11969 unsigned int indx;
11970 bfd_vma plt0;
11971
11972 /* Build the .glink plt call stub. */
11973 if (htab->emit_stub_syms)
11974 {
11975 struct elf_link_hash_entry *h;
11976 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11977 TRUE, FALSE, FALSE);
11978 if (h == NULL)
11979 return FALSE;
11980 if (h->root.type == bfd_link_hash_new)
11981 {
11982 h->root.type = bfd_link_hash_defined;
11983 h->root.u.def.section = htab->glink;
11984 h->root.u.def.value = 8;
11985 h->ref_regular = 1;
11986 h->def_regular = 1;
11987 h->ref_regular_nonweak = 1;
11988 h->forced_local = 1;
11989 h->non_elf = 0;
11990 }
11991 }
11992 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11993 if (info->emitrelocations)
11994 {
11995 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11996 if (r == NULL)
11997 return FALSE;
11998 r->r_offset = (htab->glink->output_offset
11999 + htab->glink->output_section->vma);
12000 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12001 r->r_addend = plt0;
12002 }
12003 p = htab->glink->contents;
12004 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12005 bfd_put_64 (htab->glink->owner, plt0, p);
12006 p += 8;
12007 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12008 p += 4;
12009 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12010 p += 4;
12011 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12012 p += 4;
12013 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
12014 p += 4;
12015 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12016 p += 4;
12017 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
12018 p += 4;
12019 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
12020 p += 4;
12021 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
12022 p += 4;
12023 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
12024 p += 4;
12025 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
12026 p += 4;
12027 bfd_put_32 (htab->glink->owner, BCTR, p);
12028 p += 4;
12029 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12030 {
12031 bfd_put_32 (htab->glink->owner, NOP, p);
12032 p += 4;
12033 }
12034
12035 /* Build the .glink lazy link call stubs. */
12036 indx = 0;
12037 while (p < htab->glink->contents + htab->glink->size)
12038 {
12039 if (indx < 0x8000)
12040 {
12041 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12042 p += 4;
12043 }
12044 else
12045 {
12046 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12047 p += 4;
12048 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
12049 p += 4;
12050 }
12051 bfd_put_32 (htab->glink->owner,
12052 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12053 indx++;
12054 p += 4;
12055 }
12056 htab->glink->rawsize = p - htab->glink->contents;
12057 }
12058
12059 if (htab->brlt->size != 0)
12060 {
12061 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12062 htab->brlt->size);
12063 if (htab->brlt->contents == NULL)
12064 return FALSE;
12065 }
12066 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12067 {
12068 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12069 htab->relbrlt->size);
12070 if (htab->relbrlt->contents == NULL)
12071 return FALSE;
12072 }
12073
12074 if (htab->glink_eh_frame != NULL
12075 && htab->glink_eh_frame->size != 0)
12076 {
12077 bfd_vma val;
12078 bfd_byte *last_fde;
12079 size_t last_fde_len, size, align, pad;
12080
12081 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12082 if (p == NULL)
12083 return FALSE;
12084 htab->glink_eh_frame->contents = p;
12085 last_fde = p;
12086
12087 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12088
12089 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12090 /* CIE length (rewrite in case little-endian). */
12091 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12092 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12093 p += sizeof (glink_eh_frame_cie);
12094
12095 for (stub_sec = htab->stub_bfd->sections;
12096 stub_sec != NULL;
12097 stub_sec = stub_sec->next)
12098 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12099 {
12100 last_fde = p;
12101 last_fde_len = 16;
12102 /* FDE length. */
12103 bfd_put_32 (htab->elf.dynobj, 16, p);
12104 p += 4;
12105 /* CIE pointer. */
12106 val = p - htab->glink_eh_frame->contents;
12107 bfd_put_32 (htab->elf.dynobj, val, p);
12108 p += 4;
12109 /* Offset to stub section. */
12110 val = (stub_sec->output_section->vma
12111 + stub_sec->output_offset);
12112 val -= (htab->glink_eh_frame->output_section->vma
12113 + htab->glink_eh_frame->output_offset);
12114 val -= p - htab->glink_eh_frame->contents;
12115 if (val + 0x80000000 > 0xffffffff)
12116 {
12117 info->callbacks->einfo
12118 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12119 stub_sec->name);
12120 return FALSE;
12121 }
12122 bfd_put_32 (htab->elf.dynobj, val, p);
12123 p += 4;
12124 /* stub section size. */
12125 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12126 p += 4;
12127 /* Augmentation. */
12128 p += 1;
12129 /* Pad. */
12130 p += 3;
12131 }
12132 if (htab->glink != NULL && htab->glink->size != 0)
12133 {
12134 last_fde = p;
12135 last_fde_len = 20;
12136 /* FDE length. */
12137 bfd_put_32 (htab->elf.dynobj, 20, p);
12138 p += 4;
12139 /* CIE pointer. */
12140 val = p - htab->glink_eh_frame->contents;
12141 bfd_put_32 (htab->elf.dynobj, val, p);
12142 p += 4;
12143 /* Offset to .glink. */
12144 val = (htab->glink->output_section->vma
12145 + htab->glink->output_offset
12146 + 8);
12147 val -= (htab->glink_eh_frame->output_section->vma
12148 + htab->glink_eh_frame->output_offset);
12149 val -= p - htab->glink_eh_frame->contents;
12150 if (val + 0x80000000 > 0xffffffff)
12151 {
12152 info->callbacks->einfo
12153 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12154 htab->glink->name);
12155 return FALSE;
12156 }
12157 bfd_put_32 (htab->elf.dynobj, val, p);
12158 p += 4;
12159 /* .glink size. */
12160 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12161 p += 4;
12162 /* Augmentation. */
12163 p += 1;
12164
12165 *p++ = DW_CFA_advance_loc + 1;
12166 *p++ = DW_CFA_register;
12167 *p++ = 65;
12168 *p++ = 12;
12169 *p++ = DW_CFA_advance_loc + 4;
12170 *p++ = DW_CFA_restore_extended;
12171 *p++ = 65;
12172 }
12173 /* Subsume any padding into the last FDE if user .eh_frame
12174 sections are aligned more than glink_eh_frame. Otherwise any
12175 zero padding will be seen as a terminator. */
12176 size = p - htab->glink_eh_frame->contents;
12177 align = 1;
12178 align <<= htab->glink_eh_frame->output_section->alignment_power;
12179 align -= 1;
12180 pad = ((size + align) & ~align) - size;
12181 htab->glink_eh_frame->size = size + pad;
12182 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12183 }
12184
12185 /* Build the stubs as directed by the stub hash table. */
12186 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12187
12188 if (htab->relbrlt != NULL)
12189 htab->relbrlt->reloc_count = 0;
12190
12191 if (htab->plt_stub_align != 0)
12192 for (stub_sec = htab->stub_bfd->sections;
12193 stub_sec != NULL;
12194 stub_sec = stub_sec->next)
12195 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12196 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12197 & (-1 << htab->plt_stub_align));
12198
12199 for (stub_sec = htab->stub_bfd->sections;
12200 stub_sec != NULL;
12201 stub_sec = stub_sec->next)
12202 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12203 {
12204 stub_sec_count += 1;
12205 if (stub_sec->rawsize != stub_sec->size)
12206 break;
12207 }
12208
12209 if (stub_sec != NULL
12210 || htab->glink->rawsize != htab->glink->size
12211 || (htab->glink_eh_frame != NULL
12212 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12213 {
12214 htab->stub_error = TRUE;
12215 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12216 }
12217
12218 if (htab->stub_error)
12219 return FALSE;
12220
12221 if (stats != NULL)
12222 {
12223 *stats = bfd_malloc (500);
12224 if (*stats == NULL)
12225 return FALSE;
12226
12227 sprintf (*stats, _("linker stubs in %u group%s\n"
12228 " branch %lu\n"
12229 " toc adjust %lu\n"
12230 " long branch %lu\n"
12231 " long toc adj %lu\n"
12232 " plt call %lu\n"
12233 " plt call toc %lu"),
12234 stub_sec_count,
12235 stub_sec_count == 1 ? "" : "s",
12236 htab->stub_count[ppc_stub_long_branch - 1],
12237 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12238 htab->stub_count[ppc_stub_plt_branch - 1],
12239 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12240 htab->stub_count[ppc_stub_plt_call - 1],
12241 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12242 }
12243 return TRUE;
12244 }
12245
12246 /* This function undoes the changes made by add_symbol_adjust. */
12247
12248 static bfd_boolean
12249 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12250 {
12251 struct ppc_link_hash_entry *eh;
12252
12253 if (h->root.type == bfd_link_hash_indirect)
12254 return TRUE;
12255
12256 eh = (struct ppc_link_hash_entry *) h;
12257 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12258 return TRUE;
12259
12260 eh->elf.root.type = bfd_link_hash_undefined;
12261 return TRUE;
12262 }
12263
12264 void
12265 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12266 {
12267 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12268
12269 if (htab != NULL)
12270 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12271 }
12272
12273 /* What to do when ld finds relocations against symbols defined in
12274 discarded sections. */
12275
12276 static unsigned int
12277 ppc64_elf_action_discarded (asection *sec)
12278 {
12279 if (strcmp (".opd", sec->name) == 0)
12280 return 0;
12281
12282 if (strcmp (".toc", sec->name) == 0)
12283 return 0;
12284
12285 if (strcmp (".toc1", sec->name) == 0)
12286 return 0;
12287
12288 return _bfd_elf_default_action_discarded (sec);
12289 }
12290
12291 /* The RELOCATE_SECTION function is called by the ELF backend linker
12292 to handle the relocations for a section.
12293
12294 The relocs are always passed as Rela structures; if the section
12295 actually uses Rel structures, the r_addend field will always be
12296 zero.
12297
12298 This function is responsible for adjust the section contents as
12299 necessary, and (if using Rela relocs and generating a
12300 relocatable output file) adjusting the reloc addend as
12301 necessary.
12302
12303 This function does not have to worry about setting the reloc
12304 address or the reloc symbol index.
12305
12306 LOCAL_SYMS is a pointer to the swapped in local symbols.
12307
12308 LOCAL_SECTIONS is an array giving the section in the input file
12309 corresponding to the st_shndx field of each local symbol.
12310
12311 The global hash table entry for the global symbols can be found
12312 via elf_sym_hashes (input_bfd).
12313
12314 When generating relocatable output, this function must handle
12315 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12316 going to be the section symbol corresponding to the output
12317 section, which means that the addend must be adjusted
12318 accordingly. */
12319
12320 static bfd_boolean
12321 ppc64_elf_relocate_section (bfd *output_bfd,
12322 struct bfd_link_info *info,
12323 bfd *input_bfd,
12324 asection *input_section,
12325 bfd_byte *contents,
12326 Elf_Internal_Rela *relocs,
12327 Elf_Internal_Sym *local_syms,
12328 asection **local_sections)
12329 {
12330 struct ppc_link_hash_table *htab;
12331 Elf_Internal_Shdr *symtab_hdr;
12332 struct elf_link_hash_entry **sym_hashes;
12333 Elf_Internal_Rela *rel;
12334 Elf_Internal_Rela *relend;
12335 Elf_Internal_Rela outrel;
12336 bfd_byte *loc;
12337 struct got_entry **local_got_ents;
12338 bfd_vma TOCstart;
12339 bfd_boolean ret = TRUE;
12340 bfd_boolean is_opd;
12341 /* Assume 'at' branch hints. */
12342 bfd_boolean is_isa_v2 = TRUE;
12343 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12344
12345 /* Initialize howto table if needed. */
12346 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12347 ppc_howto_init ();
12348
12349 htab = ppc_hash_table (info);
12350 if (htab == NULL)
12351 return FALSE;
12352
12353 /* Don't relocate stub sections. */
12354 if (input_section->owner == htab->stub_bfd)
12355 return TRUE;
12356
12357 BFD_ASSERT (is_ppc64_elf (input_bfd));
12358
12359 local_got_ents = elf_local_got_ents (input_bfd);
12360 TOCstart = elf_gp (output_bfd);
12361 symtab_hdr = &elf_symtab_hdr (input_bfd);
12362 sym_hashes = elf_sym_hashes (input_bfd);
12363 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12364
12365 rel = relocs;
12366 relend = relocs + input_section->reloc_count;
12367 for (; rel < relend; rel++)
12368 {
12369 enum elf_ppc64_reloc_type r_type;
12370 bfd_vma addend;
12371 bfd_reloc_status_type r;
12372 Elf_Internal_Sym *sym;
12373 asection *sec;
12374 struct elf_link_hash_entry *h_elf;
12375 struct ppc_link_hash_entry *h;
12376 struct ppc_link_hash_entry *fdh;
12377 const char *sym_name;
12378 unsigned long r_symndx, toc_symndx;
12379 bfd_vma toc_addend;
12380 unsigned char tls_mask, tls_gd, tls_type;
12381 unsigned char sym_type;
12382 bfd_vma relocation;
12383 bfd_boolean unresolved_reloc;
12384 bfd_boolean warned;
12385 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12386 unsigned int insn;
12387 unsigned int mask;
12388 struct ppc_stub_hash_entry *stub_entry;
12389 bfd_vma max_br_offset;
12390 bfd_vma from;
12391 const Elf_Internal_Rela orig_rel = *rel;
12392
12393 r_type = ELF64_R_TYPE (rel->r_info);
12394 r_symndx = ELF64_R_SYM (rel->r_info);
12395
12396 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12397 symbol of the previous ADDR64 reloc. The symbol gives us the
12398 proper TOC base to use. */
12399 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12400 && rel != relocs
12401 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12402 && is_opd)
12403 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12404
12405 sym = NULL;
12406 sec = NULL;
12407 h_elf = NULL;
12408 sym_name = NULL;
12409 unresolved_reloc = FALSE;
12410 warned = FALSE;
12411
12412 if (r_symndx < symtab_hdr->sh_info)
12413 {
12414 /* It's a local symbol. */
12415 struct _opd_sec_data *opd;
12416
12417 sym = local_syms + r_symndx;
12418 sec = local_sections[r_symndx];
12419 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12420 sym_type = ELF64_ST_TYPE (sym->st_info);
12421 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12422 opd = get_opd_info (sec);
12423 if (opd != NULL && opd->adjust != NULL)
12424 {
12425 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12426 if (adjust == -1)
12427 relocation = 0;
12428 else
12429 {
12430 /* If this is a relocation against the opd section sym
12431 and we have edited .opd, adjust the reloc addend so
12432 that ld -r and ld --emit-relocs output is correct.
12433 If it is a reloc against some other .opd symbol,
12434 then the symbol value will be adjusted later. */
12435 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12436 rel->r_addend += adjust;
12437 else
12438 relocation += adjust;
12439 }
12440 }
12441 }
12442 else
12443 {
12444 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12445 r_symndx, symtab_hdr, sym_hashes,
12446 h_elf, sec, relocation,
12447 unresolved_reloc, warned);
12448 sym_name = h_elf->root.root.string;
12449 sym_type = h_elf->type;
12450 if (sec != NULL
12451 && sec->owner == output_bfd
12452 && strcmp (sec->name, ".opd") == 0)
12453 {
12454 /* This is a symbol defined in a linker script. All
12455 such are defined in output sections, even those
12456 defined by simple assignment from a symbol defined in
12457 an input section. Transfer the symbol to an
12458 appropriate input .opd section, so that a branch to
12459 this symbol will be mapped to the location specified
12460 by the opd entry. */
12461 struct bfd_link_order *lo;
12462 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
12463 if (lo->type == bfd_indirect_link_order)
12464 {
12465 asection *isec = lo->u.indirect.section;
12466 if (h_elf->root.u.def.value >= isec->output_offset
12467 && h_elf->root.u.def.value < (isec->output_offset
12468 + isec->size))
12469 {
12470 h_elf->root.u.def.value -= isec->output_offset;
12471 h_elf->root.u.def.section = isec;
12472 sec = isec;
12473 break;
12474 }
12475 }
12476 }
12477 }
12478 h = (struct ppc_link_hash_entry *) h_elf;
12479
12480 if (sec != NULL && discarded_section (sec))
12481 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12482 rel, 1, relend,
12483 ppc64_elf_howto_table[r_type], 0,
12484 contents);
12485
12486 if (info->relocatable)
12487 continue;
12488
12489 if (h != NULL && &h->elf == htab->elf.hgot)
12490 {
12491 relocation = (TOCstart
12492 + htab->stub_group[input_section->id].toc_off);
12493 sec = bfd_abs_section_ptr;
12494 unresolved_reloc = FALSE;
12495 }
12496
12497 /* TLS optimizations. Replace instruction sequences and relocs
12498 based on information we collected in tls_optimize. We edit
12499 RELOCS so that --emit-relocs will output something sensible
12500 for the final instruction stream. */
12501 tls_mask = 0;
12502 tls_gd = 0;
12503 toc_symndx = 0;
12504 if (h != NULL)
12505 tls_mask = h->tls_mask;
12506 else if (local_got_ents != NULL)
12507 {
12508 struct plt_entry **local_plt = (struct plt_entry **)
12509 (local_got_ents + symtab_hdr->sh_info);
12510 unsigned char *lgot_masks = (unsigned char *)
12511 (local_plt + symtab_hdr->sh_info);
12512 tls_mask = lgot_masks[r_symndx];
12513 }
12514 if (tls_mask == 0
12515 && (r_type == R_PPC64_TLS
12516 || r_type == R_PPC64_TLSGD
12517 || r_type == R_PPC64_TLSLD))
12518 {
12519 /* Check for toc tls entries. */
12520 unsigned char *toc_tls;
12521
12522 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12523 &local_syms, rel, input_bfd))
12524 return FALSE;
12525
12526 if (toc_tls)
12527 tls_mask = *toc_tls;
12528 }
12529
12530 /* Check that tls relocs are used with tls syms, and non-tls
12531 relocs are used with non-tls syms. */
12532 if (r_symndx != STN_UNDEF
12533 && r_type != R_PPC64_NONE
12534 && (h == NULL
12535 || h->elf.root.type == bfd_link_hash_defined
12536 || h->elf.root.type == bfd_link_hash_defweak)
12537 && (IS_PPC64_TLS_RELOC (r_type)
12538 != (sym_type == STT_TLS
12539 || (sym_type == STT_SECTION
12540 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12541 {
12542 if (tls_mask != 0
12543 && (r_type == R_PPC64_TLS
12544 || r_type == R_PPC64_TLSGD
12545 || r_type == R_PPC64_TLSLD))
12546 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12547 ;
12548 else
12549 info->callbacks->einfo
12550 (!IS_PPC64_TLS_RELOC (r_type)
12551 ? _("%P: %H: %s used with TLS symbol `%T'\n")
12552 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
12553 input_bfd, input_section, rel->r_offset,
12554 ppc64_elf_howto_table[r_type]->name,
12555 sym_name);
12556 }
12557
12558 /* Ensure reloc mapping code below stays sane. */
12559 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12560 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12561 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12562 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12563 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12564 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12565 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12566 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12567 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12568 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12569 abort ();
12570
12571 switch (r_type)
12572 {
12573 default:
12574 break;
12575
12576 case R_PPC64_LO_DS_OPT:
12577 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12578 if ((insn & (0x3f << 26)) != 58u << 26)
12579 abort ();
12580 insn += (14u << 26) - (58u << 26);
12581 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12582 r_type = R_PPC64_TOC16_LO;
12583 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12584 break;
12585
12586 case R_PPC64_TOC16:
12587 case R_PPC64_TOC16_LO:
12588 case R_PPC64_TOC16_DS:
12589 case R_PPC64_TOC16_LO_DS:
12590 {
12591 /* Check for toc tls entries. */
12592 unsigned char *toc_tls;
12593 int retval;
12594
12595 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12596 &local_syms, rel, input_bfd);
12597 if (retval == 0)
12598 return FALSE;
12599
12600 if (toc_tls)
12601 {
12602 tls_mask = *toc_tls;
12603 if (r_type == R_PPC64_TOC16_DS
12604 || r_type == R_PPC64_TOC16_LO_DS)
12605 {
12606 if (tls_mask != 0
12607 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12608 goto toctprel;
12609 }
12610 else
12611 {
12612 /* If we found a GD reloc pair, then we might be
12613 doing a GD->IE transition. */
12614 if (retval == 2)
12615 {
12616 tls_gd = TLS_TPRELGD;
12617 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12618 goto tls_ldgd_opt;
12619 }
12620 else if (retval == 3)
12621 {
12622 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12623 goto tls_ldgd_opt;
12624 }
12625 }
12626 }
12627 }
12628 break;
12629
12630 case R_PPC64_GOT_TPREL16_HI:
12631 case R_PPC64_GOT_TPREL16_HA:
12632 if (tls_mask != 0
12633 && (tls_mask & TLS_TPREL) == 0)
12634 {
12635 rel->r_offset -= d_offset;
12636 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12637 r_type = R_PPC64_NONE;
12638 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12639 }
12640 break;
12641
12642 case R_PPC64_GOT_TPREL16_DS:
12643 case R_PPC64_GOT_TPREL16_LO_DS:
12644 if (tls_mask != 0
12645 && (tls_mask & TLS_TPREL) == 0)
12646 {
12647 toctprel:
12648 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12649 insn &= 31 << 21;
12650 insn |= 0x3c0d0000; /* addis 0,13,0 */
12651 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12652 r_type = R_PPC64_TPREL16_HA;
12653 if (toc_symndx != 0)
12654 {
12655 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12656 rel->r_addend = toc_addend;
12657 /* We changed the symbol. Start over in order to
12658 get h, sym, sec etc. right. */
12659 rel--;
12660 continue;
12661 }
12662 else
12663 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12664 }
12665 break;
12666
12667 case R_PPC64_TLS:
12668 if (tls_mask != 0
12669 && (tls_mask & TLS_TPREL) == 0)
12670 {
12671 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12672 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12673 if (insn == 0)
12674 abort ();
12675 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12676 /* Was PPC64_TLS which sits on insn boundary, now
12677 PPC64_TPREL16_LO which is at low-order half-word. */
12678 rel->r_offset += d_offset;
12679 r_type = R_PPC64_TPREL16_LO;
12680 if (toc_symndx != 0)
12681 {
12682 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12683 rel->r_addend = toc_addend;
12684 /* We changed the symbol. Start over in order to
12685 get h, sym, sec etc. right. */
12686 rel--;
12687 continue;
12688 }
12689 else
12690 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12691 }
12692 break;
12693
12694 case R_PPC64_GOT_TLSGD16_HI:
12695 case R_PPC64_GOT_TLSGD16_HA:
12696 tls_gd = TLS_TPRELGD;
12697 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12698 goto tls_gdld_hi;
12699 break;
12700
12701 case R_PPC64_GOT_TLSLD16_HI:
12702 case R_PPC64_GOT_TLSLD16_HA:
12703 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12704 {
12705 tls_gdld_hi:
12706 if ((tls_mask & tls_gd) != 0)
12707 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12708 + R_PPC64_GOT_TPREL16_DS);
12709 else
12710 {
12711 rel->r_offset -= d_offset;
12712 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12713 r_type = R_PPC64_NONE;
12714 }
12715 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12716 }
12717 break;
12718
12719 case R_PPC64_GOT_TLSGD16:
12720 case R_PPC64_GOT_TLSGD16_LO:
12721 tls_gd = TLS_TPRELGD;
12722 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12723 goto tls_ldgd_opt;
12724 break;
12725
12726 case R_PPC64_GOT_TLSLD16:
12727 case R_PPC64_GOT_TLSLD16_LO:
12728 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12729 {
12730 unsigned int insn1, insn2, insn3;
12731 bfd_vma offset;
12732
12733 tls_ldgd_opt:
12734 offset = (bfd_vma) -1;
12735 /* If not using the newer R_PPC64_TLSGD/LD to mark
12736 __tls_get_addr calls, we must trust that the call
12737 stays with its arg setup insns, ie. that the next
12738 reloc is the __tls_get_addr call associated with
12739 the current reloc. Edit both insns. */
12740 if (input_section->has_tls_get_addr_call
12741 && rel + 1 < relend
12742 && branch_reloc_hash_match (input_bfd, rel + 1,
12743 htab->tls_get_addr,
12744 htab->tls_get_addr_fd))
12745 offset = rel[1].r_offset;
12746 if ((tls_mask & tls_gd) != 0)
12747 {
12748 /* IE */
12749 insn1 = bfd_get_32 (output_bfd,
12750 contents + rel->r_offset - d_offset);
12751 insn1 &= (1 << 26) - (1 << 2);
12752 insn1 |= 58 << 26; /* ld */
12753 insn2 = 0x7c636a14; /* add 3,3,13 */
12754 if (offset != (bfd_vma) -1)
12755 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12756 if ((tls_mask & TLS_EXPLICIT) == 0)
12757 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12758 + R_PPC64_GOT_TPREL16_DS);
12759 else
12760 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12761 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12762 }
12763 else
12764 {
12765 /* LE */
12766 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12767 insn2 = 0x38630000; /* addi 3,3,0 */
12768 if (tls_gd == 0)
12769 {
12770 /* Was an LD reloc. */
12771 if (toc_symndx)
12772 sec = local_sections[toc_symndx];
12773 for (r_symndx = 0;
12774 r_symndx < symtab_hdr->sh_info;
12775 r_symndx++)
12776 if (local_sections[r_symndx] == sec)
12777 break;
12778 if (r_symndx >= symtab_hdr->sh_info)
12779 r_symndx = STN_UNDEF;
12780 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12781 if (r_symndx != STN_UNDEF)
12782 rel->r_addend -= (local_syms[r_symndx].st_value
12783 + sec->output_offset
12784 + sec->output_section->vma);
12785 }
12786 else if (toc_symndx != 0)
12787 {
12788 r_symndx = toc_symndx;
12789 rel->r_addend = toc_addend;
12790 }
12791 r_type = R_PPC64_TPREL16_HA;
12792 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12793 if (offset != (bfd_vma) -1)
12794 {
12795 rel[1].r_info = ELF64_R_INFO (r_symndx,
12796 R_PPC64_TPREL16_LO);
12797 rel[1].r_offset = offset + d_offset;
12798 rel[1].r_addend = rel->r_addend;
12799 }
12800 }
12801 bfd_put_32 (output_bfd, insn1,
12802 contents + rel->r_offset - d_offset);
12803 if (offset != (bfd_vma) -1)
12804 {
12805 insn3 = bfd_get_32 (output_bfd,
12806 contents + offset + 4);
12807 if (insn3 == NOP
12808 || insn3 == CROR_151515 || insn3 == CROR_313131)
12809 {
12810 rel[1].r_offset += 4;
12811 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12812 insn2 = NOP;
12813 }
12814 bfd_put_32 (output_bfd, insn2, contents + offset);
12815 }
12816 if ((tls_mask & tls_gd) == 0
12817 && (tls_gd == 0 || toc_symndx != 0))
12818 {
12819 /* We changed the symbol. Start over in order
12820 to get h, sym, sec etc. right. */
12821 rel--;
12822 continue;
12823 }
12824 }
12825 break;
12826
12827 case R_PPC64_TLSGD:
12828 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12829 {
12830 unsigned int insn2, insn3;
12831 bfd_vma offset = rel->r_offset;
12832
12833 if ((tls_mask & TLS_TPRELGD) != 0)
12834 {
12835 /* IE */
12836 r_type = R_PPC64_NONE;
12837 insn2 = 0x7c636a14; /* add 3,3,13 */
12838 }
12839 else
12840 {
12841 /* LE */
12842 if (toc_symndx != 0)
12843 {
12844 r_symndx = toc_symndx;
12845 rel->r_addend = toc_addend;
12846 }
12847 r_type = R_PPC64_TPREL16_LO;
12848 rel->r_offset = offset + d_offset;
12849 insn2 = 0x38630000; /* addi 3,3,0 */
12850 }
12851 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12852 /* Zap the reloc on the _tls_get_addr call too. */
12853 BFD_ASSERT (offset == rel[1].r_offset);
12854 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12855 insn3 = bfd_get_32 (output_bfd,
12856 contents + offset + 4);
12857 if (insn3 == NOP
12858 || insn3 == CROR_151515 || insn3 == CROR_313131)
12859 {
12860 rel->r_offset += 4;
12861 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12862 insn2 = NOP;
12863 }
12864 bfd_put_32 (output_bfd, insn2, contents + offset);
12865 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12866 {
12867 rel--;
12868 continue;
12869 }
12870 }
12871 break;
12872
12873 case R_PPC64_TLSLD:
12874 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12875 {
12876 unsigned int insn2, insn3;
12877 bfd_vma offset = rel->r_offset;
12878
12879 if (toc_symndx)
12880 sec = local_sections[toc_symndx];
12881 for (r_symndx = 0;
12882 r_symndx < symtab_hdr->sh_info;
12883 r_symndx++)
12884 if (local_sections[r_symndx] == sec)
12885 break;
12886 if (r_symndx >= symtab_hdr->sh_info)
12887 r_symndx = STN_UNDEF;
12888 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12889 if (r_symndx != STN_UNDEF)
12890 rel->r_addend -= (local_syms[r_symndx].st_value
12891 + sec->output_offset
12892 + sec->output_section->vma);
12893
12894 r_type = R_PPC64_TPREL16_LO;
12895 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12896 rel->r_offset = offset + d_offset;
12897 /* Zap the reloc on the _tls_get_addr call too. */
12898 BFD_ASSERT (offset == rel[1].r_offset);
12899 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12900 insn2 = 0x38630000; /* addi 3,3,0 */
12901 insn3 = bfd_get_32 (output_bfd,
12902 contents + offset + 4);
12903 if (insn3 == NOP
12904 || insn3 == CROR_151515 || insn3 == CROR_313131)
12905 {
12906 rel->r_offset += 4;
12907 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12908 insn2 = NOP;
12909 }
12910 bfd_put_32 (output_bfd, insn2, contents + offset);
12911 rel--;
12912 continue;
12913 }
12914 break;
12915
12916 case R_PPC64_DTPMOD64:
12917 if (rel + 1 < relend
12918 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12919 && rel[1].r_offset == rel->r_offset + 8)
12920 {
12921 if ((tls_mask & TLS_GD) == 0)
12922 {
12923 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12924 if ((tls_mask & TLS_TPRELGD) != 0)
12925 r_type = R_PPC64_TPREL64;
12926 else
12927 {
12928 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12929 r_type = R_PPC64_NONE;
12930 }
12931 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12932 }
12933 }
12934 else
12935 {
12936 if ((tls_mask & TLS_LD) == 0)
12937 {
12938 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12939 r_type = R_PPC64_NONE;
12940 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12941 }
12942 }
12943 break;
12944
12945 case R_PPC64_TPREL64:
12946 if ((tls_mask & TLS_TPREL) == 0)
12947 {
12948 r_type = R_PPC64_NONE;
12949 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12950 }
12951 break;
12952 }
12953
12954 /* Handle other relocations that tweak non-addend part of insn. */
12955 insn = 0;
12956 max_br_offset = 1 << 25;
12957 addend = rel->r_addend;
12958 reloc_dest = DEST_NORMAL;
12959 switch (r_type)
12960 {
12961 default:
12962 break;
12963
12964 case R_PPC64_TOCSAVE:
12965 if (relocation + addend == (rel->r_offset
12966 + input_section->output_offset
12967 + input_section->output_section->vma)
12968 && tocsave_find (htab, NO_INSERT,
12969 &local_syms, rel, input_bfd))
12970 {
12971 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
12972 if (insn == NOP
12973 || insn == CROR_151515 || insn == CROR_313131)
12974 bfd_put_32 (input_bfd, STD_R2_40R1,
12975 contents + rel->r_offset);
12976 }
12977 break;
12978
12979 /* Branch taken prediction relocations. */
12980 case R_PPC64_ADDR14_BRTAKEN:
12981 case R_PPC64_REL14_BRTAKEN:
12982 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12983 /* Fall thru. */
12984
12985 /* Branch not taken prediction relocations. */
12986 case R_PPC64_ADDR14_BRNTAKEN:
12987 case R_PPC64_REL14_BRNTAKEN:
12988 insn |= bfd_get_32 (output_bfd,
12989 contents + rel->r_offset) & ~(0x01 << 21);
12990 /* Fall thru. */
12991
12992 case R_PPC64_REL14:
12993 max_br_offset = 1 << 15;
12994 /* Fall thru. */
12995
12996 case R_PPC64_REL24:
12997 /* Calls to functions with a different TOC, such as calls to
12998 shared objects, need to alter the TOC pointer. This is
12999 done using a linkage stub. A REL24 branching to these
13000 linkage stubs needs to be followed by a nop, as the nop
13001 will be replaced with an instruction to restore the TOC
13002 base pointer. */
13003 fdh = h;
13004 if (h != NULL
13005 && h->oh != NULL
13006 && h->oh->is_func_descriptor)
13007 fdh = ppc_follow_link (h->oh);
13008 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13009 htab);
13010 if (stub_entry != NULL
13011 && (stub_entry->stub_type == ppc_stub_plt_call
13012 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13013 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13014 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13015 {
13016 bfd_boolean can_plt_call = FALSE;
13017
13018 if (rel->r_offset + 8 <= input_section->size)
13019 {
13020 unsigned long nop;
13021 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
13022 if (nop == NOP
13023 || nop == CROR_151515 || nop == CROR_313131)
13024 {
13025 if (h != NULL
13026 && (h == htab->tls_get_addr_fd
13027 || h == htab->tls_get_addr)
13028 && !htab->no_tls_get_addr_opt)
13029 {
13030 /* Special stub used, leave nop alone. */
13031 }
13032 else
13033 bfd_put_32 (input_bfd, LD_R2_40R1,
13034 contents + rel->r_offset + 4);
13035 can_plt_call = TRUE;
13036 }
13037 }
13038
13039 if (!can_plt_call)
13040 {
13041 if (stub_entry->stub_type == ppc_stub_plt_call
13042 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13043 {
13044 /* If this is a plain branch rather than a branch
13045 and link, don't require a nop. However, don't
13046 allow tail calls in a shared library as they
13047 will result in r2 being corrupted. */
13048 unsigned long br;
13049 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
13050 if (info->executable && (br & 1) == 0)
13051 can_plt_call = TRUE;
13052 else
13053 stub_entry = NULL;
13054 }
13055 else if (h != NULL
13056 && strcmp (h->elf.root.root.string,
13057 ".__libc_start_main") == 0)
13058 {
13059 /* Allow crt1 branch to go via a toc adjusting stub. */
13060 can_plt_call = TRUE;
13061 }
13062 else
13063 {
13064 info->callbacks->einfo
13065 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13066 "recompile with -fPIC"),
13067 input_bfd, input_section, rel->r_offset, sym_name);
13068
13069 bfd_set_error (bfd_error_bad_value);
13070 ret = FALSE;
13071 }
13072 }
13073
13074 if (can_plt_call
13075 && (stub_entry->stub_type == ppc_stub_plt_call
13076 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13077 unresolved_reloc = FALSE;
13078 }
13079
13080 if ((stub_entry == NULL
13081 || stub_entry->stub_type == ppc_stub_long_branch
13082 || stub_entry->stub_type == ppc_stub_plt_branch)
13083 && get_opd_info (sec) != NULL)
13084 {
13085 /* The branch destination is the value of the opd entry. */
13086 bfd_vma off = (relocation + addend
13087 - sec->output_section->vma
13088 - sec->output_offset);
13089 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13090 if (dest != (bfd_vma) -1)
13091 {
13092 relocation = dest;
13093 addend = 0;
13094 reloc_dest = DEST_OPD;
13095 }
13096 }
13097
13098 /* If the branch is out of reach we ought to have a long
13099 branch stub. */
13100 from = (rel->r_offset
13101 + input_section->output_offset
13102 + input_section->output_section->vma);
13103
13104 if (stub_entry != NULL
13105 && (stub_entry->stub_type == ppc_stub_long_branch
13106 || stub_entry->stub_type == ppc_stub_plt_branch)
13107 && (r_type == R_PPC64_ADDR14_BRTAKEN
13108 || r_type == R_PPC64_ADDR14_BRNTAKEN
13109 || (relocation + addend - from + max_br_offset
13110 < 2 * max_br_offset)))
13111 /* Don't use the stub if this branch is in range. */
13112 stub_entry = NULL;
13113
13114 if (stub_entry != NULL)
13115 {
13116 /* Munge up the value and addend so that we call the stub
13117 rather than the procedure directly. */
13118 relocation = (stub_entry->stub_offset
13119 + stub_entry->stub_sec->output_offset
13120 + stub_entry->stub_sec->output_section->vma);
13121 addend = 0;
13122 reloc_dest = DEST_STUB;
13123
13124 if ((stub_entry->stub_type == ppc_stub_plt_call
13125 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13126 && (ALWAYS_EMIT_R2SAVE
13127 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13128 && rel + 1 < relend
13129 && rel[1].r_offset == rel->r_offset + 4
13130 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13131 relocation += 4;
13132 }
13133
13134 if (insn != 0)
13135 {
13136 if (is_isa_v2)
13137 {
13138 /* Set 'a' bit. This is 0b00010 in BO field for branch
13139 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13140 for branch on CTR insns (BO == 1a00t or 1a01t). */
13141 if ((insn & (0x14 << 21)) == (0x04 << 21))
13142 insn |= 0x02 << 21;
13143 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13144 insn |= 0x08 << 21;
13145 else
13146 break;
13147 }
13148 else
13149 {
13150 /* Invert 'y' bit if not the default. */
13151 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13152 insn ^= 0x01 << 21;
13153 }
13154
13155 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13156 }
13157
13158 /* NOP out calls to undefined weak functions.
13159 We can thus call a weak function without first
13160 checking whether the function is defined. */
13161 else if (h != NULL
13162 && h->elf.root.type == bfd_link_hash_undefweak
13163 && h->elf.dynindx == -1
13164 && r_type == R_PPC64_REL24
13165 && relocation == 0
13166 && addend == 0)
13167 {
13168 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13169 continue;
13170 }
13171 break;
13172 }
13173
13174 /* Set `addend'. */
13175 tls_type = 0;
13176 switch (r_type)
13177 {
13178 default:
13179 info->callbacks->einfo
13180 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13181 input_bfd, (int) r_type, sym_name);
13182
13183 bfd_set_error (bfd_error_bad_value);
13184 ret = FALSE;
13185 continue;
13186
13187 case R_PPC64_NONE:
13188 case R_PPC64_TLS:
13189 case R_PPC64_TLSGD:
13190 case R_PPC64_TLSLD:
13191 case R_PPC64_TOCSAVE:
13192 case R_PPC64_GNU_VTINHERIT:
13193 case R_PPC64_GNU_VTENTRY:
13194 continue;
13195
13196 /* GOT16 relocations. Like an ADDR16 using the symbol's
13197 address in the GOT as relocation value instead of the
13198 symbol's value itself. Also, create a GOT entry for the
13199 symbol and put the symbol value there. */
13200 case R_PPC64_GOT_TLSGD16:
13201 case R_PPC64_GOT_TLSGD16_LO:
13202 case R_PPC64_GOT_TLSGD16_HI:
13203 case R_PPC64_GOT_TLSGD16_HA:
13204 tls_type = TLS_TLS | TLS_GD;
13205 goto dogot;
13206
13207 case R_PPC64_GOT_TLSLD16:
13208 case R_PPC64_GOT_TLSLD16_LO:
13209 case R_PPC64_GOT_TLSLD16_HI:
13210 case R_PPC64_GOT_TLSLD16_HA:
13211 tls_type = TLS_TLS | TLS_LD;
13212 goto dogot;
13213
13214 case R_PPC64_GOT_TPREL16_DS:
13215 case R_PPC64_GOT_TPREL16_LO_DS:
13216 case R_PPC64_GOT_TPREL16_HI:
13217 case R_PPC64_GOT_TPREL16_HA:
13218 tls_type = TLS_TLS | TLS_TPREL;
13219 goto dogot;
13220
13221 case R_PPC64_GOT_DTPREL16_DS:
13222 case R_PPC64_GOT_DTPREL16_LO_DS:
13223 case R_PPC64_GOT_DTPREL16_HI:
13224 case R_PPC64_GOT_DTPREL16_HA:
13225 tls_type = TLS_TLS | TLS_DTPREL;
13226 goto dogot;
13227
13228 case R_PPC64_GOT16:
13229 case R_PPC64_GOT16_LO:
13230 case R_PPC64_GOT16_HI:
13231 case R_PPC64_GOT16_HA:
13232 case R_PPC64_GOT16_DS:
13233 case R_PPC64_GOT16_LO_DS:
13234 dogot:
13235 {
13236 /* Relocation is to the entry for this symbol in the global
13237 offset table. */
13238 asection *got;
13239 bfd_vma *offp;
13240 bfd_vma off;
13241 unsigned long indx = 0;
13242 struct got_entry *ent;
13243
13244 if (tls_type == (TLS_TLS | TLS_LD)
13245 && (h == NULL
13246 || !h->elf.def_dynamic))
13247 ent = ppc64_tlsld_got (input_bfd);
13248 else
13249 {
13250
13251 if (h != NULL)
13252 {
13253 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13254 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13255 &h->elf)
13256 || (info->shared
13257 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13258 /* This is actually a static link, or it is a
13259 -Bsymbolic link and the symbol is defined
13260 locally, or the symbol was forced to be local
13261 because of a version file. */
13262 ;
13263 else
13264 {
13265 BFD_ASSERT (h->elf.dynindx != -1);
13266 indx = h->elf.dynindx;
13267 unresolved_reloc = FALSE;
13268 }
13269 ent = h->elf.got.glist;
13270 }
13271 else
13272 {
13273 if (local_got_ents == NULL)
13274 abort ();
13275 ent = local_got_ents[r_symndx];
13276 }
13277
13278 for (; ent != NULL; ent = ent->next)
13279 if (ent->addend == orig_rel.r_addend
13280 && ent->owner == input_bfd
13281 && ent->tls_type == tls_type)
13282 break;
13283 }
13284
13285 if (ent == NULL)
13286 abort ();
13287 if (ent->is_indirect)
13288 ent = ent->got.ent;
13289 offp = &ent->got.offset;
13290 got = ppc64_elf_tdata (ent->owner)->got;
13291 if (got == NULL)
13292 abort ();
13293
13294 /* The offset must always be a multiple of 8. We use the
13295 least significant bit to record whether we have already
13296 processed this entry. */
13297 off = *offp;
13298 if ((off & 1) != 0)
13299 off &= ~1;
13300 else
13301 {
13302 /* Generate relocs for the dynamic linker, except in
13303 the case of TLSLD where we'll use one entry per
13304 module. */
13305 asection *relgot;
13306 bfd_boolean ifunc;
13307
13308 *offp = off | 1;
13309 relgot = NULL;
13310 ifunc = (h != NULL
13311 ? h->elf.type == STT_GNU_IFUNC
13312 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13313 if (ifunc)
13314 relgot = htab->reliplt;
13315 else if ((info->shared || indx != 0)
13316 && (h == NULL
13317 || (tls_type == (TLS_TLS | TLS_LD)
13318 && !h->elf.def_dynamic)
13319 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13320 || h->elf.root.type != bfd_link_hash_undefweak))
13321 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13322 if (relgot != NULL)
13323 {
13324 outrel.r_offset = (got->output_section->vma
13325 + got->output_offset
13326 + off);
13327 outrel.r_addend = addend;
13328 if (tls_type & (TLS_LD | TLS_GD))
13329 {
13330 outrel.r_addend = 0;
13331 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13332 if (tls_type == (TLS_TLS | TLS_GD))
13333 {
13334 loc = relgot->contents;
13335 loc += (relgot->reloc_count++
13336 * sizeof (Elf64_External_Rela));
13337 bfd_elf64_swap_reloca_out (output_bfd,
13338 &outrel, loc);
13339 outrel.r_offset += 8;
13340 outrel.r_addend = addend;
13341 outrel.r_info
13342 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13343 }
13344 }
13345 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13346 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13347 else if (tls_type == (TLS_TLS | TLS_TPREL))
13348 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13349 else if (indx != 0)
13350 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13351 else
13352 {
13353 if (ifunc)
13354 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13355 else
13356 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13357
13358 /* Write the .got section contents for the sake
13359 of prelink. */
13360 loc = got->contents + off;
13361 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13362 loc);
13363 }
13364
13365 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13366 {
13367 outrel.r_addend += relocation;
13368 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13369 outrel.r_addend -= htab->elf.tls_sec->vma;
13370 }
13371 loc = relgot->contents;
13372 loc += (relgot->reloc_count++
13373 * sizeof (Elf64_External_Rela));
13374 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13375 }
13376
13377 /* Init the .got section contents here if we're not
13378 emitting a reloc. */
13379 else
13380 {
13381 relocation += addend;
13382 if (tls_type == (TLS_TLS | TLS_LD))
13383 relocation = 1;
13384 else if (tls_type != 0)
13385 {
13386 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13387 if (tls_type == (TLS_TLS | TLS_TPREL))
13388 relocation += DTP_OFFSET - TP_OFFSET;
13389
13390 if (tls_type == (TLS_TLS | TLS_GD))
13391 {
13392 bfd_put_64 (output_bfd, relocation,
13393 got->contents + off + 8);
13394 relocation = 1;
13395 }
13396 }
13397
13398 bfd_put_64 (output_bfd, relocation,
13399 got->contents + off);
13400 }
13401 }
13402
13403 if (off >= (bfd_vma) -2)
13404 abort ();
13405
13406 relocation = got->output_section->vma + got->output_offset + off;
13407 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13408 }
13409 break;
13410
13411 case R_PPC64_PLT16_HA:
13412 case R_PPC64_PLT16_HI:
13413 case R_PPC64_PLT16_LO:
13414 case R_PPC64_PLT32:
13415 case R_PPC64_PLT64:
13416 /* Relocation is to the entry for this symbol in the
13417 procedure linkage table. */
13418
13419 /* Resolve a PLT reloc against a local symbol directly,
13420 without using the procedure linkage table. */
13421 if (h == NULL)
13422 break;
13423
13424 /* It's possible that we didn't make a PLT entry for this
13425 symbol. This happens when statically linking PIC code,
13426 or when using -Bsymbolic. Go find a match if there is a
13427 PLT entry. */
13428 if (htab->plt != NULL)
13429 {
13430 struct plt_entry *ent;
13431 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13432 if (ent->addend == orig_rel.r_addend
13433 && ent->plt.offset != (bfd_vma) -1)
13434 {
13435 relocation = (htab->plt->output_section->vma
13436 + htab->plt->output_offset
13437 + ent->plt.offset);
13438 unresolved_reloc = FALSE;
13439 }
13440 }
13441 break;
13442
13443 case R_PPC64_TOC:
13444 /* Relocation value is TOC base. */
13445 relocation = TOCstart;
13446 if (r_symndx == STN_UNDEF)
13447 relocation += htab->stub_group[input_section->id].toc_off;
13448 else if (unresolved_reloc)
13449 ;
13450 else if (sec != NULL && sec->id <= htab->top_id)
13451 relocation += htab->stub_group[sec->id].toc_off;
13452 else
13453 unresolved_reloc = TRUE;
13454 goto dodyn;
13455
13456 /* TOC16 relocs. We want the offset relative to the TOC base,
13457 which is the address of the start of the TOC plus 0x8000.
13458 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13459 in this order. */
13460 case R_PPC64_TOC16:
13461 case R_PPC64_TOC16_LO:
13462 case R_PPC64_TOC16_HI:
13463 case R_PPC64_TOC16_DS:
13464 case R_PPC64_TOC16_LO_DS:
13465 case R_PPC64_TOC16_HA:
13466 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13467 break;
13468
13469 /* Relocate against the beginning of the section. */
13470 case R_PPC64_SECTOFF:
13471 case R_PPC64_SECTOFF_LO:
13472 case R_PPC64_SECTOFF_HI:
13473 case R_PPC64_SECTOFF_DS:
13474 case R_PPC64_SECTOFF_LO_DS:
13475 case R_PPC64_SECTOFF_HA:
13476 if (sec != NULL)
13477 addend -= sec->output_section->vma;
13478 break;
13479
13480 case R_PPC64_REL16:
13481 case R_PPC64_REL16_LO:
13482 case R_PPC64_REL16_HI:
13483 case R_PPC64_REL16_HA:
13484 break;
13485
13486 case R_PPC64_REL14:
13487 case R_PPC64_REL14_BRNTAKEN:
13488 case R_PPC64_REL14_BRTAKEN:
13489 case R_PPC64_REL24:
13490 break;
13491
13492 case R_PPC64_TPREL16:
13493 case R_PPC64_TPREL16_LO:
13494 case R_PPC64_TPREL16_HI:
13495 case R_PPC64_TPREL16_HA:
13496 case R_PPC64_TPREL16_DS:
13497 case R_PPC64_TPREL16_LO_DS:
13498 case R_PPC64_TPREL16_HIGHER:
13499 case R_PPC64_TPREL16_HIGHERA:
13500 case R_PPC64_TPREL16_HIGHEST:
13501 case R_PPC64_TPREL16_HIGHESTA:
13502 if (h != NULL
13503 && h->elf.root.type == bfd_link_hash_undefweak
13504 && h->elf.dynindx == -1)
13505 {
13506 /* Make this relocation against an undefined weak symbol
13507 resolve to zero. This is really just a tweak, since
13508 code using weak externs ought to check that they are
13509 defined before using them. */
13510 bfd_byte *p = contents + rel->r_offset - d_offset;
13511
13512 insn = bfd_get_32 (output_bfd, p);
13513 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13514 if (insn != 0)
13515 bfd_put_32 (output_bfd, insn, p);
13516 break;
13517 }
13518 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13519 if (info->shared)
13520 /* The TPREL16 relocs shouldn't really be used in shared
13521 libs as they will result in DT_TEXTREL being set, but
13522 support them anyway. */
13523 goto dodyn;
13524 break;
13525
13526 case R_PPC64_DTPREL16:
13527 case R_PPC64_DTPREL16_LO:
13528 case R_PPC64_DTPREL16_HI:
13529 case R_PPC64_DTPREL16_HA:
13530 case R_PPC64_DTPREL16_DS:
13531 case R_PPC64_DTPREL16_LO_DS:
13532 case R_PPC64_DTPREL16_HIGHER:
13533 case R_PPC64_DTPREL16_HIGHERA:
13534 case R_PPC64_DTPREL16_HIGHEST:
13535 case R_PPC64_DTPREL16_HIGHESTA:
13536 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13537 break;
13538
13539 case R_PPC64_DTPMOD64:
13540 relocation = 1;
13541 addend = 0;
13542 goto dodyn;
13543
13544 case R_PPC64_TPREL64:
13545 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13546 goto dodyn;
13547
13548 case R_PPC64_DTPREL64:
13549 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13550 /* Fall thru */
13551
13552 /* Relocations that may need to be propagated if this is a
13553 dynamic object. */
13554 case R_PPC64_REL30:
13555 case R_PPC64_REL32:
13556 case R_PPC64_REL64:
13557 case R_PPC64_ADDR14:
13558 case R_PPC64_ADDR14_BRNTAKEN:
13559 case R_PPC64_ADDR14_BRTAKEN:
13560 case R_PPC64_ADDR16:
13561 case R_PPC64_ADDR16_DS:
13562 case R_PPC64_ADDR16_HA:
13563 case R_PPC64_ADDR16_HI:
13564 case R_PPC64_ADDR16_HIGHER:
13565 case R_PPC64_ADDR16_HIGHERA:
13566 case R_PPC64_ADDR16_HIGHEST:
13567 case R_PPC64_ADDR16_HIGHESTA:
13568 case R_PPC64_ADDR16_LO:
13569 case R_PPC64_ADDR16_LO_DS:
13570 case R_PPC64_ADDR24:
13571 case R_PPC64_ADDR32:
13572 case R_PPC64_ADDR64:
13573 case R_PPC64_UADDR16:
13574 case R_PPC64_UADDR32:
13575 case R_PPC64_UADDR64:
13576 dodyn:
13577 if ((input_section->flags & SEC_ALLOC) == 0)
13578 break;
13579
13580 if (NO_OPD_RELOCS && is_opd)
13581 break;
13582
13583 if ((info->shared
13584 && (h == NULL
13585 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13586 || h->elf.root.type != bfd_link_hash_undefweak)
13587 && (must_be_dyn_reloc (info, r_type)
13588 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13589 || (ELIMINATE_COPY_RELOCS
13590 && !info->shared
13591 && h != NULL
13592 && h->elf.dynindx != -1
13593 && !h->elf.non_got_ref
13594 && !h->elf.def_regular)
13595 || (!info->shared
13596 && (h != NULL
13597 ? h->elf.type == STT_GNU_IFUNC
13598 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13599 {
13600 bfd_boolean skip, relocate;
13601 asection *sreloc;
13602 bfd_vma out_off;
13603
13604 /* When generating a dynamic object, these relocations
13605 are copied into the output file to be resolved at run
13606 time. */
13607
13608 skip = FALSE;
13609 relocate = FALSE;
13610
13611 out_off = _bfd_elf_section_offset (output_bfd, info,
13612 input_section, rel->r_offset);
13613 if (out_off == (bfd_vma) -1)
13614 skip = TRUE;
13615 else if (out_off == (bfd_vma) -2)
13616 skip = TRUE, relocate = TRUE;
13617 out_off += (input_section->output_section->vma
13618 + input_section->output_offset);
13619 outrel.r_offset = out_off;
13620 outrel.r_addend = rel->r_addend;
13621
13622 /* Optimize unaligned reloc use. */
13623 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13624 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13625 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13626 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13627 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13628 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13629 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13630 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13631 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13632
13633 if (skip)
13634 memset (&outrel, 0, sizeof outrel);
13635 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13636 && !is_opd
13637 && r_type != R_PPC64_TOC)
13638 {
13639 BFD_ASSERT (h->elf.dynindx != -1);
13640 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13641 }
13642 else
13643 {
13644 /* This symbol is local, or marked to become local,
13645 or this is an opd section reloc which must point
13646 at a local function. */
13647 outrel.r_addend += relocation;
13648 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13649 {
13650 if (is_opd && h != NULL)
13651 {
13652 /* Lie about opd entries. This case occurs
13653 when building shared libraries and we
13654 reference a function in another shared
13655 lib. The same thing happens for a weak
13656 definition in an application that's
13657 overridden by a strong definition in a
13658 shared lib. (I believe this is a generic
13659 bug in binutils handling of weak syms.)
13660 In these cases we won't use the opd
13661 entry in this lib. */
13662 unresolved_reloc = FALSE;
13663 }
13664 if (!is_opd
13665 && r_type == R_PPC64_ADDR64
13666 && (h != NULL
13667 ? h->elf.type == STT_GNU_IFUNC
13668 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13669 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13670 else
13671 {
13672 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13673
13674 /* We need to relocate .opd contents for ld.so.
13675 Prelink also wants simple and consistent rules
13676 for relocs. This make all RELATIVE relocs have
13677 *r_offset equal to r_addend. */
13678 relocate = TRUE;
13679 }
13680 }
13681 else
13682 {
13683 long indx = 0;
13684
13685 if (h != NULL
13686 ? h->elf.type == STT_GNU_IFUNC
13687 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13688 {
13689 info->callbacks->einfo
13690 (_("%P: %H: %s for indirect "
13691 "function `%T' unsupported\n"),
13692 input_bfd, input_section, rel->r_offset,
13693 ppc64_elf_howto_table[r_type]->name,
13694 sym_name);
13695 ret = FALSE;
13696 }
13697 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13698 ;
13699 else if (sec == NULL || sec->owner == NULL)
13700 {
13701 bfd_set_error (bfd_error_bad_value);
13702 return FALSE;
13703 }
13704 else
13705 {
13706 asection *osec;
13707
13708 osec = sec->output_section;
13709 indx = elf_section_data (osec)->dynindx;
13710
13711 if (indx == 0)
13712 {
13713 if ((osec->flags & SEC_READONLY) == 0
13714 && htab->elf.data_index_section != NULL)
13715 osec = htab->elf.data_index_section;
13716 else
13717 osec = htab->elf.text_index_section;
13718 indx = elf_section_data (osec)->dynindx;
13719 }
13720 BFD_ASSERT (indx != 0);
13721
13722 /* We are turning this relocation into one
13723 against a section symbol, so subtract out
13724 the output section's address but not the
13725 offset of the input section in the output
13726 section. */
13727 outrel.r_addend -= osec->vma;
13728 }
13729
13730 outrel.r_info = ELF64_R_INFO (indx, r_type);
13731 }
13732 }
13733
13734 sreloc = elf_section_data (input_section)->sreloc;
13735 if (h != NULL
13736 ? h->elf.type == STT_GNU_IFUNC
13737 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13738 sreloc = htab->reliplt;
13739 if (sreloc == NULL)
13740 abort ();
13741
13742 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13743 >= sreloc->size)
13744 abort ();
13745 loc = sreloc->contents;
13746 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13747 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13748
13749 /* If this reloc is against an external symbol, it will
13750 be computed at runtime, so there's no need to do
13751 anything now. However, for the sake of prelink ensure
13752 that the section contents are a known value. */
13753 if (! relocate)
13754 {
13755 unresolved_reloc = FALSE;
13756 /* The value chosen here is quite arbitrary as ld.so
13757 ignores section contents except for the special
13758 case of .opd where the contents might be accessed
13759 before relocation. Choose zero, as that won't
13760 cause reloc overflow. */
13761 relocation = 0;
13762 addend = 0;
13763 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13764 to improve backward compatibility with older
13765 versions of ld. */
13766 if (r_type == R_PPC64_ADDR64)
13767 addend = outrel.r_addend;
13768 /* Adjust pc_relative relocs to have zero in *r_offset. */
13769 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13770 addend = (input_section->output_section->vma
13771 + input_section->output_offset
13772 + rel->r_offset);
13773 }
13774 }
13775 break;
13776
13777 case R_PPC64_COPY:
13778 case R_PPC64_GLOB_DAT:
13779 case R_PPC64_JMP_SLOT:
13780 case R_PPC64_JMP_IREL:
13781 case R_PPC64_RELATIVE:
13782 /* We shouldn't ever see these dynamic relocs in relocatable
13783 files. */
13784 /* Fall through. */
13785
13786 case R_PPC64_PLTGOT16:
13787 case R_PPC64_PLTGOT16_DS:
13788 case R_PPC64_PLTGOT16_HA:
13789 case R_PPC64_PLTGOT16_HI:
13790 case R_PPC64_PLTGOT16_LO:
13791 case R_PPC64_PLTGOT16_LO_DS:
13792 case R_PPC64_PLTREL32:
13793 case R_PPC64_PLTREL64:
13794 /* These ones haven't been implemented yet. */
13795
13796 info->callbacks->einfo
13797 (_("%P: %B: %s is not supported for `%T'\n"),
13798 input_bfd,
13799 ppc64_elf_howto_table[r_type]->name, sym_name);
13800
13801 bfd_set_error (bfd_error_invalid_operation);
13802 ret = FALSE;
13803 continue;
13804 }
13805
13806 /* Multi-instruction sequences that access the TOC can be
13807 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13808 to nop; addi rb,r2,x; */
13809 switch (r_type)
13810 {
13811 default:
13812 break;
13813
13814 case R_PPC64_GOT_TLSLD16_HI:
13815 case R_PPC64_GOT_TLSGD16_HI:
13816 case R_PPC64_GOT_TPREL16_HI:
13817 case R_PPC64_GOT_DTPREL16_HI:
13818 case R_PPC64_GOT16_HI:
13819 case R_PPC64_TOC16_HI:
13820 /* These relocs would only be useful if building up an
13821 offset to later add to r2, perhaps in an indexed
13822 addressing mode instruction. Don't try to optimize.
13823 Unfortunately, the possibility of someone building up an
13824 offset like this or even with the HA relocs, means that
13825 we need to check the high insn when optimizing the low
13826 insn. */
13827 break;
13828
13829 case R_PPC64_GOT_TLSLD16_HA:
13830 case R_PPC64_GOT_TLSGD16_HA:
13831 case R_PPC64_GOT_TPREL16_HA:
13832 case R_PPC64_GOT_DTPREL16_HA:
13833 case R_PPC64_GOT16_HA:
13834 case R_PPC64_TOC16_HA:
13835 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13836 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13837 {
13838 bfd_byte *p = contents + (rel->r_offset & ~3);
13839 bfd_put_32 (input_bfd, NOP, p);
13840 }
13841 break;
13842
13843 case R_PPC64_GOT_TLSLD16_LO:
13844 case R_PPC64_GOT_TLSGD16_LO:
13845 case R_PPC64_GOT_TPREL16_LO_DS:
13846 case R_PPC64_GOT_DTPREL16_LO_DS:
13847 case R_PPC64_GOT16_LO:
13848 case R_PPC64_GOT16_LO_DS:
13849 case R_PPC64_TOC16_LO:
13850 case R_PPC64_TOC16_LO_DS:
13851 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13852 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13853 {
13854 bfd_byte *p = contents + (rel->r_offset & ~3);
13855 insn = bfd_get_32 (input_bfd, p);
13856 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
13857 {
13858 /* Transform addic to addi when we change reg. */
13859 insn &= ~((0x3f << 26) | (0x1f << 16));
13860 insn |= (14u << 26) | (2 << 16);
13861 }
13862 else
13863 {
13864 insn &= ~(0x1f << 16);
13865 insn |= 2 << 16;
13866 }
13867 bfd_put_32 (input_bfd, insn, p);
13868 }
13869 break;
13870 }
13871
13872 /* Do any further special processing. */
13873 switch (r_type)
13874 {
13875 default:
13876 break;
13877
13878 case R_PPC64_ADDR16_HA:
13879 case R_PPC64_REL16_HA:
13880 case R_PPC64_ADDR16_HIGHERA:
13881 case R_PPC64_ADDR16_HIGHESTA:
13882 case R_PPC64_TOC16_HA:
13883 case R_PPC64_SECTOFF_HA:
13884 case R_PPC64_TPREL16_HA:
13885 case R_PPC64_DTPREL16_HA:
13886 case R_PPC64_TPREL16_HIGHER:
13887 case R_PPC64_TPREL16_HIGHERA:
13888 case R_PPC64_TPREL16_HIGHEST:
13889 case R_PPC64_TPREL16_HIGHESTA:
13890 case R_PPC64_DTPREL16_HIGHER:
13891 case R_PPC64_DTPREL16_HIGHERA:
13892 case R_PPC64_DTPREL16_HIGHEST:
13893 case R_PPC64_DTPREL16_HIGHESTA:
13894 /* It's just possible that this symbol is a weak symbol
13895 that's not actually defined anywhere. In that case,
13896 'sec' would be NULL, and we should leave the symbol
13897 alone (it will be set to zero elsewhere in the link). */
13898 if (sec == NULL)
13899 break;
13900 /* Fall thru */
13901
13902 case R_PPC64_GOT16_HA:
13903 case R_PPC64_PLTGOT16_HA:
13904 case R_PPC64_PLT16_HA:
13905 case R_PPC64_GOT_TLSGD16_HA:
13906 case R_PPC64_GOT_TLSLD16_HA:
13907 case R_PPC64_GOT_TPREL16_HA:
13908 case R_PPC64_GOT_DTPREL16_HA:
13909 /* Add 0x10000 if sign bit in 0:15 is set.
13910 Bits 0:15 are not used. */
13911 addend += 0x8000;
13912 break;
13913
13914 case R_PPC64_ADDR16_DS:
13915 case R_PPC64_ADDR16_LO_DS:
13916 case R_PPC64_GOT16_DS:
13917 case R_PPC64_GOT16_LO_DS:
13918 case R_PPC64_PLT16_LO_DS:
13919 case R_PPC64_SECTOFF_DS:
13920 case R_PPC64_SECTOFF_LO_DS:
13921 case R_PPC64_TOC16_DS:
13922 case R_PPC64_TOC16_LO_DS:
13923 case R_PPC64_PLTGOT16_DS:
13924 case R_PPC64_PLTGOT16_LO_DS:
13925 case R_PPC64_GOT_TPREL16_DS:
13926 case R_PPC64_GOT_TPREL16_LO_DS:
13927 case R_PPC64_GOT_DTPREL16_DS:
13928 case R_PPC64_GOT_DTPREL16_LO_DS:
13929 case R_PPC64_TPREL16_DS:
13930 case R_PPC64_TPREL16_LO_DS:
13931 case R_PPC64_DTPREL16_DS:
13932 case R_PPC64_DTPREL16_LO_DS:
13933 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13934 mask = 3;
13935 /* If this reloc is against an lq insn, then the value must be
13936 a multiple of 16. This is somewhat of a hack, but the
13937 "correct" way to do this by defining _DQ forms of all the
13938 _DS relocs bloats all reloc switches in this file. It
13939 doesn't seem to make much sense to use any of these relocs
13940 in data, so testing the insn should be safe. */
13941 if ((insn & (0x3f << 26)) == (56u << 26))
13942 mask = 15;
13943 if (((relocation + addend) & mask) != 0)
13944 {
13945 info->callbacks->einfo
13946 (_("%P: %H: error: %s not a multiple of %u\n"),
13947 input_bfd, input_section, rel->r_offset,
13948 ppc64_elf_howto_table[r_type]->name,
13949 mask + 1);
13950 bfd_set_error (bfd_error_bad_value);
13951 ret = FALSE;
13952 continue;
13953 }
13954 break;
13955 }
13956
13957 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13958 because such sections are not SEC_ALLOC and thus ld.so will
13959 not process them. */
13960 if (unresolved_reloc
13961 && !((input_section->flags & SEC_DEBUGGING) != 0
13962 && h->elf.def_dynamic)
13963 && _bfd_elf_section_offset (output_bfd, info, input_section,
13964 rel->r_offset) != (bfd_vma) -1)
13965 {
13966 info->callbacks->einfo
13967 (_("%P: %H: unresolvable %s against `%T'\n"),
13968 input_bfd, input_section, rel->r_offset,
13969 ppc64_elf_howto_table[(int) r_type]->name,
13970 h->elf.root.root.string);
13971 ret = FALSE;
13972 }
13973
13974 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13975 input_bfd,
13976 input_section,
13977 contents,
13978 rel->r_offset,
13979 relocation,
13980 addend);
13981
13982 if (r != bfd_reloc_ok)
13983 {
13984 char *more_info = NULL;
13985 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
13986
13987 if (reloc_dest != DEST_NORMAL)
13988 {
13989 more_info = bfd_malloc (strlen (reloc_name) + 8);
13990 if (more_info != NULL)
13991 {
13992 strcpy (more_info, reloc_name);
13993 strcat (more_info, (reloc_dest == DEST_OPD
13994 ? " (OPD)" : " (stub)"));
13995 reloc_name = more_info;
13996 }
13997 }
13998
13999 if (r == bfd_reloc_overflow)
14000 {
14001 if (warned)
14002 continue;
14003 if (h != NULL
14004 && h->elf.root.type == bfd_link_hash_undefweak
14005 && ppc64_elf_howto_table[r_type]->pc_relative)
14006 {
14007 /* Assume this is a call protected by other code that
14008 detects the symbol is undefined. If this is the case,
14009 we can safely ignore the overflow. If not, the
14010 program is hosed anyway, and a little warning isn't
14011 going to help. */
14012
14013 continue;
14014 }
14015
14016 if (!((*info->callbacks->reloc_overflow)
14017 (info, &h->elf.root, sym_name,
14018 reloc_name, orig_rel.r_addend,
14019 input_bfd, input_section, rel->r_offset)))
14020 return FALSE;
14021 }
14022 else
14023 {
14024 info->callbacks->einfo
14025 (_("%P: %H: %s against `%T': error %d\n"),
14026 input_bfd, input_section, rel->r_offset,
14027 reloc_name, sym_name, (int) r);
14028 ret = FALSE;
14029 }
14030 if (more_info != NULL)
14031 free (more_info);
14032 }
14033 }
14034
14035 /* If we're emitting relocations, then shortly after this function
14036 returns, reloc offsets and addends for this section will be
14037 adjusted. Worse, reloc symbol indices will be for the output
14038 file rather than the input. Save a copy of the relocs for
14039 opd_entry_value. */
14040 if (is_opd && (info->emitrelocations || info->relocatable))
14041 {
14042 bfd_size_type amt;
14043 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14044 rel = bfd_alloc (input_bfd, amt);
14045 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
14046 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
14047 if (rel == NULL)
14048 return FALSE;
14049 memcpy (rel, relocs, amt);
14050 }
14051 return ret;
14052 }
14053
14054 /* Adjust the value of any local symbols in opd sections. */
14055
14056 static int
14057 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14058 const char *name ATTRIBUTE_UNUSED,
14059 Elf_Internal_Sym *elfsym,
14060 asection *input_sec,
14061 struct elf_link_hash_entry *h)
14062 {
14063 struct _opd_sec_data *opd;
14064 long adjust;
14065 bfd_vma value;
14066
14067 if (h != NULL)
14068 return 1;
14069
14070 opd = get_opd_info (input_sec);
14071 if (opd == NULL || opd->adjust == NULL)
14072 return 1;
14073
14074 value = elfsym->st_value - input_sec->output_offset;
14075 if (!info->relocatable)
14076 value -= input_sec->output_section->vma;
14077
14078 adjust = opd->adjust[value / 8];
14079 if (adjust == -1)
14080 return 2;
14081
14082 elfsym->st_value += adjust;
14083 return 1;
14084 }
14085
14086 /* Finish up dynamic symbol handling. We set the contents of various
14087 dynamic sections here. */
14088
14089 static bfd_boolean
14090 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14091 struct bfd_link_info *info,
14092 struct elf_link_hash_entry *h,
14093 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14094 {
14095 struct ppc_link_hash_table *htab;
14096 struct plt_entry *ent;
14097 Elf_Internal_Rela rela;
14098 bfd_byte *loc;
14099
14100 htab = ppc_hash_table (info);
14101 if (htab == NULL)
14102 return FALSE;
14103
14104 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14105 if (ent->plt.offset != (bfd_vma) -1)
14106 {
14107 /* This symbol has an entry in the procedure linkage
14108 table. Set it up. */
14109 if (!htab->elf.dynamic_sections_created
14110 || h->dynindx == -1)
14111 {
14112 BFD_ASSERT (h->type == STT_GNU_IFUNC
14113 && h->def_regular
14114 && (h->root.type == bfd_link_hash_defined
14115 || h->root.type == bfd_link_hash_defweak));
14116 rela.r_offset = (htab->iplt->output_section->vma
14117 + htab->iplt->output_offset
14118 + ent->plt.offset);
14119 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14120 rela.r_addend = (h->root.u.def.value
14121 + h->root.u.def.section->output_offset
14122 + h->root.u.def.section->output_section->vma
14123 + ent->addend);
14124 loc = (htab->reliplt->contents
14125 + (htab->reliplt->reloc_count++
14126 * sizeof (Elf64_External_Rela)));
14127 }
14128 else
14129 {
14130 rela.r_offset = (htab->plt->output_section->vma
14131 + htab->plt->output_offset
14132 + ent->plt.offset);
14133 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14134 rela.r_addend = ent->addend;
14135 loc = (htab->relplt->contents
14136 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
14137 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
14138 }
14139 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14140 }
14141
14142 if (h->needs_copy)
14143 {
14144 /* This symbol needs a copy reloc. Set it up. */
14145
14146 if (h->dynindx == -1
14147 || (h->root.type != bfd_link_hash_defined
14148 && h->root.type != bfd_link_hash_defweak)
14149 || htab->relbss == NULL)
14150 abort ();
14151
14152 rela.r_offset = (h->root.u.def.value
14153 + h->root.u.def.section->output_section->vma
14154 + h->root.u.def.section->output_offset);
14155 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14156 rela.r_addend = 0;
14157 loc = htab->relbss->contents;
14158 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14159 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14160 }
14161
14162 return TRUE;
14163 }
14164
14165 /* Used to decide how to sort relocs in an optimal manner for the
14166 dynamic linker, before writing them out. */
14167
14168 static enum elf_reloc_type_class
14169 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14170 const asection *rel_sec,
14171 const Elf_Internal_Rela *rela)
14172 {
14173 enum elf_ppc64_reloc_type r_type;
14174 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14175
14176 if (rel_sec == htab->reliplt)
14177 return reloc_class_ifunc;
14178
14179 r_type = ELF64_R_TYPE (rela->r_info);
14180 switch (r_type)
14181 {
14182 case R_PPC64_RELATIVE:
14183 return reloc_class_relative;
14184 case R_PPC64_JMP_SLOT:
14185 return reloc_class_plt;
14186 case R_PPC64_COPY:
14187 return reloc_class_copy;
14188 default:
14189 return reloc_class_normal;
14190 }
14191 }
14192
14193 /* Finish up the dynamic sections. */
14194
14195 static bfd_boolean
14196 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14197 struct bfd_link_info *info)
14198 {
14199 struct ppc_link_hash_table *htab;
14200 bfd *dynobj;
14201 asection *sdyn;
14202
14203 htab = ppc_hash_table (info);
14204 if (htab == NULL)
14205 return FALSE;
14206
14207 dynobj = htab->elf.dynobj;
14208 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14209
14210 if (htab->elf.dynamic_sections_created)
14211 {
14212 Elf64_External_Dyn *dyncon, *dynconend;
14213
14214 if (sdyn == NULL || htab->got == NULL)
14215 abort ();
14216
14217 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14218 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14219 for (; dyncon < dynconend; dyncon++)
14220 {
14221 Elf_Internal_Dyn dyn;
14222 asection *s;
14223
14224 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14225
14226 switch (dyn.d_tag)
14227 {
14228 default:
14229 continue;
14230
14231 case DT_PPC64_GLINK:
14232 s = htab->glink;
14233 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14234 /* We stupidly defined DT_PPC64_GLINK to be the start
14235 of glink rather than the first entry point, which is
14236 what ld.so needs, and now have a bigger stub to
14237 support automatic multiple TOCs. */
14238 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14239 break;
14240
14241 case DT_PPC64_OPD:
14242 s = bfd_get_section_by_name (output_bfd, ".opd");
14243 if (s == NULL)
14244 continue;
14245 dyn.d_un.d_ptr = s->vma;
14246 break;
14247
14248 case DT_PPC64_OPDSZ:
14249 s = bfd_get_section_by_name (output_bfd, ".opd");
14250 if (s == NULL)
14251 continue;
14252 dyn.d_un.d_val = s->size;
14253 break;
14254
14255 case DT_PLTGOT:
14256 s = htab->plt;
14257 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14258 break;
14259
14260 case DT_JMPREL:
14261 s = htab->relplt;
14262 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14263 break;
14264
14265 case DT_PLTRELSZ:
14266 dyn.d_un.d_val = htab->relplt->size;
14267 break;
14268
14269 case DT_RELASZ:
14270 /* Don't count procedure linkage table relocs in the
14271 overall reloc count. */
14272 s = htab->relplt;
14273 if (s == NULL)
14274 continue;
14275 dyn.d_un.d_val -= s->size;
14276 break;
14277
14278 case DT_RELA:
14279 /* We may not be using the standard ELF linker script.
14280 If .rela.plt is the first .rela section, we adjust
14281 DT_RELA to not include it. */
14282 s = htab->relplt;
14283 if (s == NULL)
14284 continue;
14285 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14286 continue;
14287 dyn.d_un.d_ptr += s->size;
14288 break;
14289 }
14290
14291 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14292 }
14293 }
14294
14295 if (htab->got != NULL && htab->got->size != 0)
14296 {
14297 /* Fill in the first entry in the global offset table.
14298 We use it to hold the link-time TOCbase. */
14299 bfd_put_64 (output_bfd,
14300 elf_gp (output_bfd) + TOC_BASE_OFF,
14301 htab->got->contents);
14302
14303 /* Set .got entry size. */
14304 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14305 }
14306
14307 if (htab->plt != NULL && htab->plt->size != 0)
14308 {
14309 /* Set .plt entry size. */
14310 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14311 = PLT_ENTRY_SIZE;
14312 }
14313
14314 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14315 brlt ourselves if emitrelocations. */
14316 if (htab->brlt != NULL
14317 && htab->brlt->reloc_count != 0
14318 && !_bfd_elf_link_output_relocs (output_bfd,
14319 htab->brlt,
14320 elf_section_data (htab->brlt)->rela.hdr,
14321 elf_section_data (htab->brlt)->relocs,
14322 NULL))
14323 return FALSE;
14324
14325 if (htab->glink != NULL
14326 && htab->glink->reloc_count != 0
14327 && !_bfd_elf_link_output_relocs (output_bfd,
14328 htab->glink,
14329 elf_section_data (htab->glink)->rela.hdr,
14330 elf_section_data (htab->glink)->relocs,
14331 NULL))
14332 return FALSE;
14333
14334
14335 if (htab->glink_eh_frame != NULL
14336 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14337 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14338 htab->glink_eh_frame,
14339 htab->glink_eh_frame->contents))
14340 return FALSE;
14341
14342 /* We need to handle writing out multiple GOT sections ourselves,
14343 since we didn't add them to DYNOBJ. We know dynobj is the first
14344 bfd. */
14345 while ((dynobj = dynobj->link_next) != NULL)
14346 {
14347 asection *s;
14348
14349 if (!is_ppc64_elf (dynobj))
14350 continue;
14351
14352 s = ppc64_elf_tdata (dynobj)->got;
14353 if (s != NULL
14354 && s->size != 0
14355 && s->output_section != bfd_abs_section_ptr
14356 && !bfd_set_section_contents (output_bfd, s->output_section,
14357 s->contents, s->output_offset,
14358 s->size))
14359 return FALSE;
14360 s = ppc64_elf_tdata (dynobj)->relgot;
14361 if (s != NULL
14362 && s->size != 0
14363 && s->output_section != bfd_abs_section_ptr
14364 && !bfd_set_section_contents (output_bfd, s->output_section,
14365 s->contents, s->output_offset,
14366 s->size))
14367 return FALSE;
14368 }
14369
14370 return TRUE;
14371 }
14372
14373 #include "elf64-target.h"
14374
14375 /* FreeBSD support */
14376
14377 #undef TARGET_LITTLE_SYM
14378 #undef TARGET_LITTLE_NAME
14379
14380 #undef TARGET_BIG_SYM
14381 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14382 #undef TARGET_BIG_NAME
14383 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14384
14385 #undef ELF_OSABI
14386 #define ELF_OSABI ELFOSABI_FREEBSD
14387
14388 #undef elf64_bed
14389 #define elf64_bed elf64_powerpc_fbsd_bed
14390
14391 #include "elf64-target.h"
14392
GDB Binutils - Deliverables
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