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Report overflow on PowerPC64 @h and @ha relocations.
[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_notice_as_needed ppc64_elf_notice_as_needed
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_signed, /* 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_signed, /* 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_signed,/* 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_signed,/* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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_signed, /* 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 /* Like R_PPC64_ADDR16_HI, but no overflow. */
1992 HOWTO (R_PPC64_ADDR16_HIGH, /* type */
1993 16, /* rightshift */
1994 1, /* size (0 = byte, 1 = short, 2 = long) */
1995 16, /* bitsize */
1996 FALSE, /* pc_relative */
1997 0, /* bitpos */
1998 complain_overflow_dont, /* complain_on_overflow */
1999 bfd_elf_generic_reloc, /* special_function */
2000 "R_PPC64_ADDR16_HIGH", /* name */
2001 FALSE, /* partial_inplace */
2002 0, /* src_mask */
2003 0xffff, /* dst_mask */
2004 FALSE), /* pcrel_offset */
2005
2006 /* Like R_PPC64_ADDR16_HA, but no overflow. */
2007 HOWTO (R_PPC64_ADDR16_HIGHA, /* type */
2008 16, /* rightshift */
2009 1, /* size (0 = byte, 1 = short, 2 = long) */
2010 16, /* bitsize */
2011 FALSE, /* pc_relative */
2012 0, /* bitpos */
2013 complain_overflow_dont, /* complain_on_overflow */
2014 ppc64_elf_ha_reloc, /* special_function */
2015 "R_PPC64_ADDR16_HIGHA", /* name */
2016 FALSE, /* partial_inplace */
2017 0, /* src_mask */
2018 0xffff, /* dst_mask */
2019 FALSE), /* pcrel_offset */
2020
2021 /* Like R_PPC64_DTPREL16_HI, but no overflow. */
2022 HOWTO (R_PPC64_DTPREL16_HIGH,
2023 16, /* rightshift */
2024 1, /* size (0 = byte, 1 = short, 2 = long) */
2025 16, /* bitsize */
2026 FALSE, /* pc_relative */
2027 0, /* bitpos */
2028 complain_overflow_dont, /* complain_on_overflow */
2029 ppc64_elf_unhandled_reloc, /* special_function */
2030 "R_PPC64_DTPREL16_HIGH", /* name */
2031 FALSE, /* partial_inplace */
2032 0, /* src_mask */
2033 0xffff, /* dst_mask */
2034 FALSE), /* pcrel_offset */
2035
2036 /* Like R_PPC64_DTPREL16_HA, but no overflow. */
2037 HOWTO (R_PPC64_DTPREL16_HIGHA,
2038 16, /* rightshift */
2039 1, /* size (0 = byte, 1 = short, 2 = long) */
2040 16, /* bitsize */
2041 FALSE, /* pc_relative */
2042 0, /* bitpos */
2043 complain_overflow_dont, /* complain_on_overflow */
2044 ppc64_elf_unhandled_reloc, /* special_function */
2045 "R_PPC64_DTPREL16_HIGHA", /* name */
2046 FALSE, /* partial_inplace */
2047 0, /* src_mask */
2048 0xffff, /* dst_mask */
2049 FALSE), /* pcrel_offset */
2050
2051 /* Like R_PPC64_TPREL16_HI, but no overflow. */
2052 HOWTO (R_PPC64_TPREL16_HIGH,
2053 16, /* rightshift */
2054 1, /* size (0 = byte, 1 = short, 2 = long) */
2055 16, /* bitsize */
2056 FALSE, /* pc_relative */
2057 0, /* bitpos */
2058 complain_overflow_dont, /* complain_on_overflow */
2059 ppc64_elf_unhandled_reloc, /* special_function */
2060 "R_PPC64_TPREL16_HIGH", /* name */
2061 FALSE, /* partial_inplace */
2062 0, /* src_mask */
2063 0xffff, /* dst_mask */
2064 FALSE), /* pcrel_offset */
2065
2066 /* Like R_PPC64_TPREL16_HA, but no overflow. */
2067 HOWTO (R_PPC64_TPREL16_HIGHA,
2068 16, /* rightshift */
2069 1, /* size (0 = byte, 1 = short, 2 = long) */
2070 16, /* bitsize */
2071 FALSE, /* pc_relative */
2072 0, /* bitpos */
2073 complain_overflow_dont, /* complain_on_overflow */
2074 ppc64_elf_unhandled_reloc, /* special_function */
2075 "R_PPC64_TPREL16_HIGHA", /* name */
2076 FALSE, /* partial_inplace */
2077 0, /* src_mask */
2078 0xffff, /* dst_mask */
2079 FALSE), /* pcrel_offset */
2080
2081 /* GNU extension to record C++ vtable hierarchy. */
2082 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
2083 0, /* rightshift */
2084 0, /* size (0 = byte, 1 = short, 2 = long) */
2085 0, /* bitsize */
2086 FALSE, /* pc_relative */
2087 0, /* bitpos */
2088 complain_overflow_dont, /* complain_on_overflow */
2089 NULL, /* special_function */
2090 "R_PPC64_GNU_VTINHERIT", /* name */
2091 FALSE, /* partial_inplace */
2092 0, /* src_mask */
2093 0, /* dst_mask */
2094 FALSE), /* pcrel_offset */
2095
2096 /* GNU extension to record C++ vtable member usage. */
2097 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
2098 0, /* rightshift */
2099 0, /* size (0 = byte, 1 = short, 2 = long) */
2100 0, /* bitsize */
2101 FALSE, /* pc_relative */
2102 0, /* bitpos */
2103 complain_overflow_dont, /* complain_on_overflow */
2104 NULL, /* special_function */
2105 "R_PPC64_GNU_VTENTRY", /* name */
2106 FALSE, /* partial_inplace */
2107 0, /* src_mask */
2108 0, /* dst_mask */
2109 FALSE), /* pcrel_offset */
2110 };
2111
2112 \f
2113 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2114 be done. */
2115
2116 static void
2117 ppc_howto_init (void)
2118 {
2119 unsigned int i, type;
2120
2121 for (i = 0;
2122 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2123 i++)
2124 {
2125 type = ppc64_elf_howto_raw[i].type;
2126 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2127 / sizeof (ppc64_elf_howto_table[0])));
2128 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2129 }
2130 }
2131
2132 static reloc_howto_type *
2133 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2134 bfd_reloc_code_real_type code)
2135 {
2136 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2137
2138 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2139 /* Initialize howto table if needed. */
2140 ppc_howto_init ();
2141
2142 switch (code)
2143 {
2144 default:
2145 return NULL;
2146
2147 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2148 break;
2149 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2150 break;
2151 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2152 break;
2153 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2154 break;
2155 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2156 break;
2157 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2158 break;
2159 case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH;
2160 break;
2161 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2162 break;
2163 case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA;
2164 break;
2165 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2166 break;
2167 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2168 break;
2169 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2170 break;
2171 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2172 break;
2173 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2174 break;
2175 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2176 break;
2177 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2178 break;
2179 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2180 break;
2181 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2182 break;
2183 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2184 break;
2185 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2186 break;
2187 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2188 break;
2189 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2190 break;
2191 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2192 break;
2193 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2194 break;
2195 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2196 break;
2197 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2198 break;
2199 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2200 break;
2201 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2202 break;
2203 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2204 break;
2205 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2206 break;
2207 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2208 break;
2209 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2210 break;
2211 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2212 break;
2213 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2214 break;
2215 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2216 break;
2217 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2218 break;
2219 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2220 break;
2221 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2222 break;
2223 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2224 break;
2225 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2226 break;
2227 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2228 break;
2229 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2230 break;
2231 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2232 break;
2233 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2234 break;
2235 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2236 break;
2237 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2238 break;
2239 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2240 break;
2241 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2242 break;
2243 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2244 break;
2245 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2246 break;
2247 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2248 break;
2249 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2250 break;
2251 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2252 break;
2253 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2254 break;
2255 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2256 break;
2257 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2258 break;
2259 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2260 break;
2261 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2262 break;
2263 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2264 break;
2265 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2266 break;
2267 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2268 break;
2269 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2270 break;
2271 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2272 break;
2273 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2274 break;
2275 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2276 break;
2277 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2278 break;
2279 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2280 break;
2281 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2282 break;
2283 case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH;
2284 break;
2285 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2286 break;
2287 case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA;
2288 break;
2289 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2290 break;
2291 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2292 break;
2293 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2294 break;
2295 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2296 break;
2297 case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH;
2298 break;
2299 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2300 break;
2301 case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA;
2302 break;
2303 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2304 break;
2305 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2306 break;
2307 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2308 break;
2309 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2310 break;
2311 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2312 break;
2313 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2314 break;
2315 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2316 break;
2317 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2318 break;
2319 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2320 break;
2321 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2322 break;
2323 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2324 break;
2325 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2326 break;
2327 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2328 break;
2329 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2330 break;
2331 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2332 break;
2333 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2334 break;
2335 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2336 break;
2337 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2338 break;
2339 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2340 break;
2341 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2342 break;
2343 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2344 break;
2345 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2346 break;
2347 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2348 break;
2349 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2350 break;
2351 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2352 break;
2353 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2354 break;
2355 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2356 break;
2357 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2358 break;
2359 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2360 break;
2361 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2362 break;
2363 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2364 break;
2365 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2366 break;
2367 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2368 break;
2369 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2370 break;
2371 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2372 break;
2373 }
2374
2375 return ppc64_elf_howto_table[r];
2376 };
2377
2378 static reloc_howto_type *
2379 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2380 const char *r_name)
2381 {
2382 unsigned int i;
2383
2384 for (i = 0;
2385 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2386 i++)
2387 if (ppc64_elf_howto_raw[i].name != NULL
2388 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2389 return &ppc64_elf_howto_raw[i];
2390
2391 return NULL;
2392 }
2393
2394 /* Set the howto pointer for a PowerPC ELF reloc. */
2395
2396 static void
2397 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2398 Elf_Internal_Rela *dst)
2399 {
2400 unsigned int type;
2401
2402 /* Initialize howto table if needed. */
2403 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2404 ppc_howto_init ();
2405
2406 type = ELF64_R_TYPE (dst->r_info);
2407 if (type >= (sizeof (ppc64_elf_howto_table)
2408 / sizeof (ppc64_elf_howto_table[0])))
2409 {
2410 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2411 abfd, (int) type);
2412 type = R_PPC64_NONE;
2413 }
2414 cache_ptr->howto = ppc64_elf_howto_table[type];
2415 }
2416
2417 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2418
2419 static bfd_reloc_status_type
2420 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2421 void *data, asection *input_section,
2422 bfd *output_bfd, char **error_message)
2423 {
2424 /* If this is a relocatable link (output_bfd test tells us), just
2425 call the generic function. Any adjustment will be done at final
2426 link time. */
2427 if (output_bfd != NULL)
2428 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2429 input_section, output_bfd, error_message);
2430
2431 /* Adjust the addend for sign extension of the low 16 bits.
2432 We won't actually be using the low 16 bits, so trashing them
2433 doesn't matter. */
2434 reloc_entry->addend += 0x8000;
2435 return bfd_reloc_continue;
2436 }
2437
2438 static bfd_reloc_status_type
2439 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2440 void *data, asection *input_section,
2441 bfd *output_bfd, char **error_message)
2442 {
2443 if (output_bfd != NULL)
2444 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2445 input_section, output_bfd, error_message);
2446
2447 if (strcmp (symbol->section->name, ".opd") == 0
2448 && (symbol->section->owner->flags & DYNAMIC) == 0)
2449 {
2450 bfd_vma dest = opd_entry_value (symbol->section,
2451 symbol->value + reloc_entry->addend,
2452 NULL, NULL, FALSE);
2453 if (dest != (bfd_vma) -1)
2454 reloc_entry->addend = dest - (symbol->value
2455 + symbol->section->output_section->vma
2456 + symbol->section->output_offset);
2457 }
2458 return bfd_reloc_continue;
2459 }
2460
2461 static bfd_reloc_status_type
2462 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2463 void *data, asection *input_section,
2464 bfd *output_bfd, char **error_message)
2465 {
2466 long insn;
2467 enum elf_ppc64_reloc_type r_type;
2468 bfd_size_type octets;
2469 /* Assume 'at' branch hints. */
2470 bfd_boolean is_isa_v2 = TRUE;
2471
2472 /* If this is a relocatable link (output_bfd test tells us), just
2473 call the generic function. Any adjustment will be done at final
2474 link time. */
2475 if (output_bfd != NULL)
2476 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2477 input_section, output_bfd, error_message);
2478
2479 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2480 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2481 insn &= ~(0x01 << 21);
2482 r_type = reloc_entry->howto->type;
2483 if (r_type == R_PPC64_ADDR14_BRTAKEN
2484 || r_type == R_PPC64_REL14_BRTAKEN)
2485 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2486
2487 if (is_isa_v2)
2488 {
2489 /* Set 'a' bit. This is 0b00010 in BO field for branch
2490 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2491 for branch on CTR insns (BO == 1a00t or 1a01t). */
2492 if ((insn & (0x14 << 21)) == (0x04 << 21))
2493 insn |= 0x02 << 21;
2494 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2495 insn |= 0x08 << 21;
2496 else
2497 goto out;
2498 }
2499 else
2500 {
2501 bfd_vma target = 0;
2502 bfd_vma from;
2503
2504 if (!bfd_is_com_section (symbol->section))
2505 target = symbol->value;
2506 target += symbol->section->output_section->vma;
2507 target += symbol->section->output_offset;
2508 target += reloc_entry->addend;
2509
2510 from = (reloc_entry->address
2511 + input_section->output_offset
2512 + input_section->output_section->vma);
2513
2514 /* Invert 'y' bit if not the default. */
2515 if ((bfd_signed_vma) (target - from) < 0)
2516 insn ^= 0x01 << 21;
2517 }
2518 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2519 out:
2520 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2521 input_section, output_bfd, error_message);
2522 }
2523
2524 static bfd_reloc_status_type
2525 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2526 void *data, asection *input_section,
2527 bfd *output_bfd, char **error_message)
2528 {
2529 /* If this is a relocatable link (output_bfd test tells us), just
2530 call the generic function. Any adjustment will be done at final
2531 link time. */
2532 if (output_bfd != NULL)
2533 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2534 input_section, output_bfd, error_message);
2535
2536 /* Subtract the symbol section base address. */
2537 reloc_entry->addend -= symbol->section->output_section->vma;
2538 return bfd_reloc_continue;
2539 }
2540
2541 static bfd_reloc_status_type
2542 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2543 void *data, asection *input_section,
2544 bfd *output_bfd, char **error_message)
2545 {
2546 /* If this is a relocatable link (output_bfd test tells us), just
2547 call the generic function. Any adjustment will be done at final
2548 link time. */
2549 if (output_bfd != NULL)
2550 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2551 input_section, output_bfd, error_message);
2552
2553 /* Subtract the symbol section base address. */
2554 reloc_entry->addend -= symbol->section->output_section->vma;
2555
2556 /* Adjust the addend for sign extension of the low 16 bits. */
2557 reloc_entry->addend += 0x8000;
2558 return bfd_reloc_continue;
2559 }
2560
2561 static bfd_reloc_status_type
2562 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2563 void *data, asection *input_section,
2564 bfd *output_bfd, char **error_message)
2565 {
2566 bfd_vma TOCstart;
2567
2568 /* If this is a relocatable link (output_bfd test tells us), just
2569 call the generic function. Any adjustment will be done at final
2570 link time. */
2571 if (output_bfd != NULL)
2572 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2573 input_section, output_bfd, error_message);
2574
2575 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2576 if (TOCstart == 0)
2577 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2578
2579 /* Subtract the TOC base address. */
2580 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2581 return bfd_reloc_continue;
2582 }
2583
2584 static bfd_reloc_status_type
2585 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2586 void *data, asection *input_section,
2587 bfd *output_bfd, char **error_message)
2588 {
2589 bfd_vma TOCstart;
2590
2591 /* If this is a relocatable link (output_bfd test tells us), just
2592 call the generic function. Any adjustment will be done at final
2593 link time. */
2594 if (output_bfd != NULL)
2595 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2596 input_section, output_bfd, error_message);
2597
2598 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2599 if (TOCstart == 0)
2600 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2601
2602 /* Subtract the TOC base address. */
2603 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2604
2605 /* Adjust the addend for sign extension of the low 16 bits. */
2606 reloc_entry->addend += 0x8000;
2607 return bfd_reloc_continue;
2608 }
2609
2610 static bfd_reloc_status_type
2611 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2612 void *data, asection *input_section,
2613 bfd *output_bfd, char **error_message)
2614 {
2615 bfd_vma TOCstart;
2616 bfd_size_type octets;
2617
2618 /* If this is a relocatable link (output_bfd test tells us), just
2619 call the generic function. Any adjustment will be done at final
2620 link time. */
2621 if (output_bfd != NULL)
2622 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2623 input_section, output_bfd, error_message);
2624
2625 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2626 if (TOCstart == 0)
2627 TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner);
2628
2629 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2630 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2631 return bfd_reloc_ok;
2632 }
2633
2634 static bfd_reloc_status_type
2635 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2636 void *data, asection *input_section,
2637 bfd *output_bfd, char **error_message)
2638 {
2639 /* If this is a relocatable link (output_bfd test tells us), just
2640 call the generic function. Any adjustment will be done at final
2641 link time. */
2642 if (output_bfd != NULL)
2643 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2644 input_section, output_bfd, error_message);
2645
2646 if (error_message != NULL)
2647 {
2648 static char buf[60];
2649 sprintf (buf, "generic linker can't handle %s",
2650 reloc_entry->howto->name);
2651 *error_message = buf;
2652 }
2653 return bfd_reloc_dangerous;
2654 }
2655
2656 /* Track GOT entries needed for a given symbol. We might need more
2657 than one got entry per symbol. */
2658 struct got_entry
2659 {
2660 struct got_entry *next;
2661
2662 /* The symbol addend that we'll be placing in the GOT. */
2663 bfd_vma addend;
2664
2665 /* Unlike other ELF targets, we use separate GOT entries for the same
2666 symbol referenced from different input files. This is to support
2667 automatic multiple TOC/GOT sections, where the TOC base can vary
2668 from one input file to another. After partitioning into TOC groups
2669 we merge entries within the group.
2670
2671 Point to the BFD owning this GOT entry. */
2672 bfd *owner;
2673
2674 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2675 TLS_TPREL or TLS_DTPREL for tls entries. */
2676 unsigned char tls_type;
2677
2678 /* Non-zero if got.ent points to real entry. */
2679 unsigned char is_indirect;
2680
2681 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2682 union
2683 {
2684 bfd_signed_vma refcount;
2685 bfd_vma offset;
2686 struct got_entry *ent;
2687 } got;
2688 };
2689
2690 /* The same for PLT. */
2691 struct plt_entry
2692 {
2693 struct plt_entry *next;
2694
2695 bfd_vma addend;
2696
2697 union
2698 {
2699 bfd_signed_vma refcount;
2700 bfd_vma offset;
2701 } plt;
2702 };
2703
2704 struct ppc64_elf_obj_tdata
2705 {
2706 struct elf_obj_tdata elf;
2707
2708 /* Shortcuts to dynamic linker sections. */
2709 asection *got;
2710 asection *relgot;
2711
2712 /* Used during garbage collection. We attach global symbols defined
2713 on removed .opd entries to this section so that the sym is removed. */
2714 asection *deleted_section;
2715
2716 /* TLS local dynamic got entry handling. Support for multiple GOT
2717 sections means we potentially need one of these for each input bfd. */
2718 struct got_entry tlsld_got;
2719
2720 union {
2721 /* A copy of relocs before they are modified for --emit-relocs. */
2722 Elf_Internal_Rela *relocs;
2723
2724 /* Section contents. */
2725 bfd_byte *contents;
2726 } opd;
2727
2728 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2729 the reloc to be in the range -32768 to 32767. */
2730 unsigned int has_small_toc_reloc : 1;
2731
2732 /* Set if toc/got ha relocs detected not using r2, or lo reloc
2733 instruction not one we handle. */
2734 unsigned int unexpected_toc_insn : 1;
2735 };
2736
2737 #define ppc64_elf_tdata(bfd) \
2738 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2739
2740 #define ppc64_tlsld_got(bfd) \
2741 (&ppc64_elf_tdata (bfd)->tlsld_got)
2742
2743 #define is_ppc64_elf(bfd) \
2744 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2745 && elf_object_id (bfd) == PPC64_ELF_DATA)
2746
2747 /* Override the generic function because we store some extras. */
2748
2749 static bfd_boolean
2750 ppc64_elf_mkobject (bfd *abfd)
2751 {
2752 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2753 PPC64_ELF_DATA);
2754 }
2755
2756 /* Fix bad default arch selected for a 64 bit input bfd when the
2757 default is 32 bit. */
2758
2759 static bfd_boolean
2760 ppc64_elf_object_p (bfd *abfd)
2761 {
2762 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2763 {
2764 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2765
2766 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2767 {
2768 /* Relies on arch after 32 bit default being 64 bit default. */
2769 abfd->arch_info = abfd->arch_info->next;
2770 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2771 }
2772 }
2773 return TRUE;
2774 }
2775
2776 /* Support for core dump NOTE sections. */
2777
2778 static bfd_boolean
2779 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2780 {
2781 size_t offset, size;
2782
2783 if (note->descsz != 504)
2784 return FALSE;
2785
2786 /* pr_cursig */
2787 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2788
2789 /* pr_pid */
2790 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
2791
2792 /* pr_reg */
2793 offset = 112;
2794 size = 384;
2795
2796 /* Make a ".reg/999" section. */
2797 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2798 size, note->descpos + offset);
2799 }
2800
2801 static bfd_boolean
2802 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2803 {
2804 if (note->descsz != 136)
2805 return FALSE;
2806
2807 elf_tdata (abfd)->core->pid
2808 = bfd_get_32 (abfd, note->descdata + 24);
2809 elf_tdata (abfd)->core->program
2810 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2811 elf_tdata (abfd)->core->command
2812 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2813
2814 return TRUE;
2815 }
2816
2817 static char *
2818 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2819 ...)
2820 {
2821 switch (note_type)
2822 {
2823 default:
2824 return NULL;
2825
2826 case NT_PRPSINFO:
2827 {
2828 char data[136];
2829 va_list ap;
2830
2831 va_start (ap, note_type);
2832 memset (data, 0, sizeof (data));
2833 strncpy (data + 40, va_arg (ap, const char *), 16);
2834 strncpy (data + 56, va_arg (ap, const char *), 80);
2835 va_end (ap);
2836 return elfcore_write_note (abfd, buf, bufsiz,
2837 "CORE", note_type, data, sizeof (data));
2838 }
2839
2840 case NT_PRSTATUS:
2841 {
2842 char data[504];
2843 va_list ap;
2844 long pid;
2845 int cursig;
2846 const void *greg;
2847
2848 va_start (ap, note_type);
2849 memset (data, 0, 112);
2850 pid = va_arg (ap, long);
2851 bfd_put_32 (abfd, pid, data + 32);
2852 cursig = va_arg (ap, int);
2853 bfd_put_16 (abfd, cursig, data + 12);
2854 greg = va_arg (ap, const void *);
2855 memcpy (data + 112, greg, 384);
2856 memset (data + 496, 0, 8);
2857 va_end (ap);
2858 return elfcore_write_note (abfd, buf, bufsiz,
2859 "CORE", note_type, data, sizeof (data));
2860 }
2861 }
2862 }
2863
2864 /* Add extra PPC sections. */
2865
2866 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2867 {
2868 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2869 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2870 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2871 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2872 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2873 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2874 { NULL, 0, 0, 0, 0 }
2875 };
2876
2877 enum _ppc64_sec_type {
2878 sec_normal = 0,
2879 sec_opd = 1,
2880 sec_toc = 2
2881 };
2882
2883 struct _ppc64_elf_section_data
2884 {
2885 struct bfd_elf_section_data elf;
2886
2887 union
2888 {
2889 /* An array with one entry for each opd function descriptor. */
2890 struct _opd_sec_data
2891 {
2892 /* Points to the function code section for local opd entries. */
2893 asection **func_sec;
2894
2895 /* After editing .opd, adjust references to opd local syms. */
2896 long *adjust;
2897 } opd;
2898
2899 /* An array for toc sections, indexed by offset/8. */
2900 struct _toc_sec_data
2901 {
2902 /* Specifies the relocation symbol index used at a given toc offset. */
2903 unsigned *symndx;
2904
2905 /* And the relocation addend. */
2906 bfd_vma *add;
2907 } toc;
2908 } u;
2909
2910 enum _ppc64_sec_type sec_type:2;
2911
2912 /* Flag set when small branches are detected. Used to
2913 select suitable defaults for the stub group size. */
2914 unsigned int has_14bit_branch:1;
2915 };
2916
2917 #define ppc64_elf_section_data(sec) \
2918 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2919
2920 static bfd_boolean
2921 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2922 {
2923 if (!sec->used_by_bfd)
2924 {
2925 struct _ppc64_elf_section_data *sdata;
2926 bfd_size_type amt = sizeof (*sdata);
2927
2928 sdata = bfd_zalloc (abfd, amt);
2929 if (sdata == NULL)
2930 return FALSE;
2931 sec->used_by_bfd = sdata;
2932 }
2933
2934 return _bfd_elf_new_section_hook (abfd, sec);
2935 }
2936
2937 static struct _opd_sec_data *
2938 get_opd_info (asection * sec)
2939 {
2940 if (sec != NULL
2941 && ppc64_elf_section_data (sec) != NULL
2942 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2943 return &ppc64_elf_section_data (sec)->u.opd;
2944 return NULL;
2945 }
2946 \f
2947 /* Parameters for the qsort hook. */
2948 static bfd_boolean synthetic_relocatable;
2949
2950 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2951
2952 static int
2953 compare_symbols (const void *ap, const void *bp)
2954 {
2955 const asymbol *a = * (const asymbol **) ap;
2956 const asymbol *b = * (const asymbol **) bp;
2957
2958 /* Section symbols first. */
2959 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2960 return -1;
2961 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2962 return 1;
2963
2964 /* then .opd symbols. */
2965 if (strcmp (a->section->name, ".opd") == 0
2966 && strcmp (b->section->name, ".opd") != 0)
2967 return -1;
2968 if (strcmp (a->section->name, ".opd") != 0
2969 && strcmp (b->section->name, ".opd") == 0)
2970 return 1;
2971
2972 /* then other code symbols. */
2973 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2974 == (SEC_CODE | SEC_ALLOC)
2975 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2976 != (SEC_CODE | SEC_ALLOC))
2977 return -1;
2978
2979 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2980 != (SEC_CODE | SEC_ALLOC)
2981 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2982 == (SEC_CODE | SEC_ALLOC))
2983 return 1;
2984
2985 if (synthetic_relocatable)
2986 {
2987 if (a->section->id < b->section->id)
2988 return -1;
2989
2990 if (a->section->id > b->section->id)
2991 return 1;
2992 }
2993
2994 if (a->value + a->section->vma < b->value + b->section->vma)
2995 return -1;
2996
2997 if (a->value + a->section->vma > b->value + b->section->vma)
2998 return 1;
2999
3000 /* For syms with the same value, prefer strong dynamic global function
3001 syms over other syms. */
3002 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
3003 return -1;
3004
3005 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
3006 return 1;
3007
3008 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
3009 return -1;
3010
3011 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
3012 return 1;
3013
3014 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
3015 return -1;
3016
3017 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
3018 return 1;
3019
3020 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
3021 return -1;
3022
3023 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
3024 return 1;
3025
3026 return 0;
3027 }
3028
3029 /* Search SYMS for a symbol of the given VALUE. */
3030
3031 static asymbol *
3032 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
3033 {
3034 long mid;
3035
3036 if (id == -1)
3037 {
3038 while (lo < hi)
3039 {
3040 mid = (lo + hi) >> 1;
3041 if (syms[mid]->value + syms[mid]->section->vma < value)
3042 lo = mid + 1;
3043 else if (syms[mid]->value + syms[mid]->section->vma > value)
3044 hi = mid;
3045 else
3046 return syms[mid];
3047 }
3048 }
3049 else
3050 {
3051 while (lo < hi)
3052 {
3053 mid = (lo + hi) >> 1;
3054 if (syms[mid]->section->id < id)
3055 lo = mid + 1;
3056 else if (syms[mid]->section->id > id)
3057 hi = mid;
3058 else if (syms[mid]->value < value)
3059 lo = mid + 1;
3060 else if (syms[mid]->value > value)
3061 hi = mid;
3062 else
3063 return syms[mid];
3064 }
3065 }
3066 return NULL;
3067 }
3068
3069 static bfd_boolean
3070 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
3071 {
3072 bfd_vma vma = *(bfd_vma *) ptr;
3073 return ((section->flags & SEC_ALLOC) != 0
3074 && section->vma <= vma
3075 && vma < section->vma + section->size);
3076 }
3077
3078 /* Create synthetic symbols, effectively restoring "dot-symbol" function
3079 entry syms. Also generate @plt symbols for the glink branch table. */
3080
3081 static long
3082 ppc64_elf_get_synthetic_symtab (bfd *abfd,
3083 long static_count, asymbol **static_syms,
3084 long dyn_count, asymbol **dyn_syms,
3085 asymbol **ret)
3086 {
3087 asymbol *s;
3088 long i;
3089 long count;
3090 char *names;
3091 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
3092 asection *opd;
3093 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
3094 asymbol **syms;
3095
3096 *ret = NULL;
3097
3098 opd = bfd_get_section_by_name (abfd, ".opd");
3099 if (opd == NULL)
3100 return 0;
3101
3102 symcount = static_count;
3103 if (!relocatable)
3104 symcount += dyn_count;
3105 if (symcount == 0)
3106 return 0;
3107
3108 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3109 if (syms == NULL)
3110 return -1;
3111
3112 if (!relocatable && static_count != 0 && dyn_count != 0)
3113 {
3114 /* Use both symbol tables. */
3115 memcpy (syms, static_syms, static_count * sizeof (*syms));
3116 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3117 }
3118 else if (!relocatable && static_count == 0)
3119 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3120 else
3121 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3122
3123 synthetic_relocatable = relocatable;
3124 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3125
3126 if (!relocatable && symcount > 1)
3127 {
3128 long j;
3129 /* Trim duplicate syms, since we may have merged the normal and
3130 dynamic symbols. Actually, we only care about syms that have
3131 different values, so trim any with the same value. */
3132 for (i = 1, j = 1; i < symcount; ++i)
3133 if (syms[i - 1]->value + syms[i - 1]->section->vma
3134 != syms[i]->value + syms[i]->section->vma)
3135 syms[j++] = syms[i];
3136 symcount = j;
3137 }
3138
3139 i = 0;
3140 if (strcmp (syms[i]->section->name, ".opd") == 0)
3141 ++i;
3142 codesecsym = i;
3143
3144 for (; i < symcount; ++i)
3145 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3146 != (SEC_CODE | SEC_ALLOC))
3147 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3148 break;
3149 codesecsymend = i;
3150
3151 for (; i < symcount; ++i)
3152 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3153 break;
3154 secsymend = i;
3155
3156 for (; i < symcount; ++i)
3157 if (strcmp (syms[i]->section->name, ".opd") != 0)
3158 break;
3159 opdsymend = i;
3160
3161 for (; i < symcount; ++i)
3162 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3163 != (SEC_CODE | SEC_ALLOC))
3164 break;
3165 symcount = i;
3166
3167 count = 0;
3168
3169 if (relocatable)
3170 {
3171 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3172 arelent *r;
3173 size_t size;
3174 long relcount;
3175
3176 if (opdsymend == secsymend)
3177 goto done;
3178
3179 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3180 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3181 if (relcount == 0)
3182 goto done;
3183
3184 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3185 {
3186 count = -1;
3187 goto done;
3188 }
3189
3190 size = 0;
3191 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3192 {
3193 asymbol *sym;
3194
3195 while (r < opd->relocation + relcount
3196 && r->address < syms[i]->value + opd->vma)
3197 ++r;
3198
3199 if (r == opd->relocation + relcount)
3200 break;
3201
3202 if (r->address != syms[i]->value + opd->vma)
3203 continue;
3204
3205 if (r->howto->type != R_PPC64_ADDR64)
3206 continue;
3207
3208 sym = *r->sym_ptr_ptr;
3209 if (!sym_exists_at (syms, opdsymend, symcount,
3210 sym->section->id, sym->value + r->addend))
3211 {
3212 ++count;
3213 size += sizeof (asymbol);
3214 size += strlen (syms[i]->name) + 2;
3215 }
3216 }
3217
3218 s = *ret = bfd_malloc (size);
3219 if (s == NULL)
3220 {
3221 count = -1;
3222 goto done;
3223 }
3224
3225 names = (char *) (s + count);
3226
3227 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3228 {
3229 asymbol *sym;
3230
3231 while (r < opd->relocation + relcount
3232 && r->address < syms[i]->value + opd->vma)
3233 ++r;
3234
3235 if (r == opd->relocation + relcount)
3236 break;
3237
3238 if (r->address != syms[i]->value + opd->vma)
3239 continue;
3240
3241 if (r->howto->type != R_PPC64_ADDR64)
3242 continue;
3243
3244 sym = *r->sym_ptr_ptr;
3245 if (!sym_exists_at (syms, opdsymend, symcount,
3246 sym->section->id, sym->value + r->addend))
3247 {
3248 size_t len;
3249
3250 *s = *syms[i];
3251 s->flags |= BSF_SYNTHETIC;
3252 s->section = sym->section;
3253 s->value = sym->value + r->addend;
3254 s->name = names;
3255 *names++ = '.';
3256 len = strlen (syms[i]->name);
3257 memcpy (names, syms[i]->name, len + 1);
3258 names += len + 1;
3259 /* Have udata.p point back to the original symbol this
3260 synthetic symbol was derived from. */
3261 s->udata.p = syms[i];
3262 s++;
3263 }
3264 }
3265 }
3266 else
3267 {
3268 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3269 bfd_byte *contents;
3270 size_t size;
3271 long plt_count = 0;
3272 bfd_vma glink_vma = 0, resolv_vma = 0;
3273 asection *dynamic, *glink = NULL, *relplt = NULL;
3274 arelent *p;
3275
3276 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3277 {
3278 if (contents)
3279 {
3280 free_contents_and_exit:
3281 free (contents);
3282 }
3283 count = -1;
3284 goto done;
3285 }
3286
3287 size = 0;
3288 for (i = secsymend; i < opdsymend; ++i)
3289 {
3290 bfd_vma ent;
3291
3292 /* Ignore bogus symbols. */
3293 if (syms[i]->value > opd->size - 8)
3294 continue;
3295
3296 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3297 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3298 {
3299 ++count;
3300 size += sizeof (asymbol);
3301 size += strlen (syms[i]->name) + 2;
3302 }
3303 }
3304
3305 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3306 if (dyn_count != 0
3307 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3308 {
3309 bfd_byte *dynbuf, *extdyn, *extdynend;
3310 size_t extdynsize;
3311 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3312
3313 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3314 goto free_contents_and_exit;
3315
3316 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3317 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3318
3319 extdyn = dynbuf;
3320 extdynend = extdyn + dynamic->size;
3321 for (; extdyn < extdynend; extdyn += extdynsize)
3322 {
3323 Elf_Internal_Dyn dyn;
3324 (*swap_dyn_in) (abfd, extdyn, &dyn);
3325
3326 if (dyn.d_tag == DT_NULL)
3327 break;
3328
3329 if (dyn.d_tag == DT_PPC64_GLINK)
3330 {
3331 /* The first glink stub starts at offset 32; see comment in
3332 ppc64_elf_finish_dynamic_sections. */
3333 glink_vma = dyn.d_un.d_val + 32;
3334 /* The .glink section usually does not survive the final
3335 link; search for the section (usually .text) where the
3336 glink stubs now reside. */
3337 glink = bfd_sections_find_if (abfd, section_covers_vma,
3338 &glink_vma);
3339 break;
3340 }
3341 }
3342
3343 free (dynbuf);
3344 }
3345
3346 if (glink != NULL)
3347 {
3348 /* Determine __glink trampoline by reading the relative branch
3349 from the first glink stub. */
3350 bfd_byte buf[4];
3351 if (bfd_get_section_contents (abfd, glink, buf,
3352 glink_vma + 4 - glink->vma, 4))
3353 {
3354 unsigned int insn = bfd_get_32 (abfd, buf);
3355 insn ^= B_DOT;
3356 if ((insn & ~0x3fffffc) == 0)
3357 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3358 }
3359
3360 if (resolv_vma)
3361 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3362
3363 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3364 if (relplt != NULL)
3365 {
3366 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3367 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3368 goto free_contents_and_exit;
3369
3370 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3371 size += plt_count * sizeof (asymbol);
3372
3373 p = relplt->relocation;
3374 for (i = 0; i < plt_count; i++, p++)
3375 {
3376 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3377 if (p->addend != 0)
3378 size += sizeof ("+0x") - 1 + 16;
3379 }
3380 }
3381 }
3382
3383 s = *ret = bfd_malloc (size);
3384 if (s == NULL)
3385 goto free_contents_and_exit;
3386
3387 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3388
3389 for (i = secsymend; i < opdsymend; ++i)
3390 {
3391 bfd_vma ent;
3392
3393 if (syms[i]->value > opd->size - 8)
3394 continue;
3395
3396 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3397 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3398 {
3399 long lo, hi;
3400 size_t len;
3401 asection *sec = abfd->sections;
3402
3403 *s = *syms[i];
3404 lo = codesecsym;
3405 hi = codesecsymend;
3406 while (lo < hi)
3407 {
3408 long mid = (lo + hi) >> 1;
3409 if (syms[mid]->section->vma < ent)
3410 lo = mid + 1;
3411 else if (syms[mid]->section->vma > ent)
3412 hi = mid;
3413 else
3414 {
3415 sec = syms[mid]->section;
3416 break;
3417 }
3418 }
3419
3420 if (lo >= hi && lo > codesecsym)
3421 sec = syms[lo - 1]->section;
3422
3423 for (; sec != NULL; sec = sec->next)
3424 {
3425 if (sec->vma > ent)
3426 break;
3427 /* SEC_LOAD may not be set if SEC is from a separate debug
3428 info file. */
3429 if ((sec->flags & SEC_ALLOC) == 0)
3430 break;
3431 if ((sec->flags & SEC_CODE) != 0)
3432 s->section = sec;
3433 }
3434 s->flags |= BSF_SYNTHETIC;
3435 s->value = ent - s->section->vma;
3436 s->name = names;
3437 *names++ = '.';
3438 len = strlen (syms[i]->name);
3439 memcpy (names, syms[i]->name, len + 1);
3440 names += len + 1;
3441 /* Have udata.p point back to the original symbol this
3442 synthetic symbol was derived from. */
3443 s->udata.p = syms[i];
3444 s++;
3445 }
3446 }
3447 free (contents);
3448
3449 if (glink != NULL && relplt != NULL)
3450 {
3451 if (resolv_vma)
3452 {
3453 /* Add a symbol for the main glink trampoline. */
3454 memset (s, 0, sizeof *s);
3455 s->the_bfd = abfd;
3456 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3457 s->section = glink;
3458 s->value = resolv_vma - glink->vma;
3459 s->name = names;
3460 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3461 names += sizeof ("__glink_PLTresolve");
3462 s++;
3463 count++;
3464 }
3465
3466 /* FIXME: It would be very much nicer to put sym@plt on the
3467 stub rather than on the glink branch table entry. The
3468 objdump disassembler would then use a sensible symbol
3469 name on plt calls. The difficulty in doing so is
3470 a) finding the stubs, and,
3471 b) matching stubs against plt entries, and,
3472 c) there can be multiple stubs for a given plt entry.
3473
3474 Solving (a) could be done by code scanning, but older
3475 ppc64 binaries used different stubs to current code.
3476 (b) is the tricky one since you need to known the toc
3477 pointer for at least one function that uses a pic stub to
3478 be able to calculate the plt address referenced.
3479 (c) means gdb would need to set multiple breakpoints (or
3480 find the glink branch itself) when setting breakpoints
3481 for pending shared library loads. */
3482 p = relplt->relocation;
3483 for (i = 0; i < plt_count; i++, p++)
3484 {
3485 size_t len;
3486
3487 *s = **p->sym_ptr_ptr;
3488 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3489 we are defining a symbol, ensure one of them is set. */
3490 if ((s->flags & BSF_LOCAL) == 0)
3491 s->flags |= BSF_GLOBAL;
3492 s->flags |= BSF_SYNTHETIC;
3493 s->section = glink;
3494 s->value = glink_vma - glink->vma;
3495 s->name = names;
3496 s->udata.p = NULL;
3497 len = strlen ((*p->sym_ptr_ptr)->name);
3498 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3499 names += len;
3500 if (p->addend != 0)
3501 {
3502 memcpy (names, "+0x", sizeof ("+0x") - 1);
3503 names += sizeof ("+0x") - 1;
3504 bfd_sprintf_vma (abfd, names, p->addend);
3505 names += strlen (names);
3506 }
3507 memcpy (names, "@plt", sizeof ("@plt"));
3508 names += sizeof ("@plt");
3509 s++;
3510 glink_vma += 8;
3511 if (i >= 0x8000)
3512 glink_vma += 4;
3513 }
3514 count += plt_count;
3515 }
3516 }
3517
3518 done:
3519 free (syms);
3520 return count;
3521 }
3522 \f
3523 /* The following functions are specific to the ELF linker, while
3524 functions above are used generally. Those named ppc64_elf_* are
3525 called by the main ELF linker code. They appear in this file more
3526 or less in the order in which they are called. eg.
3527 ppc64_elf_check_relocs is called early in the link process,
3528 ppc64_elf_finish_dynamic_sections is one of the last functions
3529 called.
3530
3531 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3532 functions have both a function code symbol and a function descriptor
3533 symbol. A call to foo in a relocatable object file looks like:
3534
3535 . .text
3536 . x:
3537 . bl .foo
3538 . nop
3539
3540 The function definition in another object file might be:
3541
3542 . .section .opd
3543 . foo: .quad .foo
3544 . .quad .TOC.@tocbase
3545 . .quad 0
3546 .
3547 . .text
3548 . .foo: blr
3549
3550 When the linker resolves the call during a static link, the branch
3551 unsurprisingly just goes to .foo and the .opd information is unused.
3552 If the function definition is in a shared library, things are a little
3553 different: The call goes via a plt call stub, the opd information gets
3554 copied to the plt, and the linker patches the nop.
3555
3556 . x:
3557 . bl .foo_stub
3558 . ld 2,40(1)
3559 .
3560 .
3561 . .foo_stub:
3562 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3563 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3564 . std 2,40(1) # this is the general idea
3565 . ld 11,0(12)
3566 . ld 2,8(12)
3567 . mtctr 11
3568 . ld 11,16(12)
3569 . bctr
3570 .
3571 . .section .plt
3572 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3573
3574 The "reloc ()" notation is supposed to indicate that the linker emits
3575 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3576 copying.
3577
3578 What are the difficulties here? Well, firstly, the relocations
3579 examined by the linker in check_relocs are against the function code
3580 sym .foo, while the dynamic relocation in the plt is emitted against
3581 the function descriptor symbol, foo. Somewhere along the line, we need
3582 to carefully copy dynamic link information from one symbol to the other.
3583 Secondly, the generic part of the elf linker will make .foo a dynamic
3584 symbol as is normal for most other backends. We need foo dynamic
3585 instead, at least for an application final link. However, when
3586 creating a shared library containing foo, we need to have both symbols
3587 dynamic so that references to .foo are satisfied during the early
3588 stages of linking. Otherwise the linker might decide to pull in a
3589 definition from some other object, eg. a static library.
3590
3591 Update: As of August 2004, we support a new convention. Function
3592 calls may use the function descriptor symbol, ie. "bl foo". This
3593 behaves exactly as "bl .foo". */
3594
3595 /* Of those relocs that might be copied as dynamic relocs, this function
3596 selects those that must be copied when linking a shared library,
3597 even when the symbol is local. */
3598
3599 static int
3600 must_be_dyn_reloc (struct bfd_link_info *info,
3601 enum elf_ppc64_reloc_type r_type)
3602 {
3603 switch (r_type)
3604 {
3605 default:
3606 return 1;
3607
3608 case R_PPC64_REL32:
3609 case R_PPC64_REL64:
3610 case R_PPC64_REL30:
3611 return 0;
3612
3613 case R_PPC64_TPREL16:
3614 case R_PPC64_TPREL16_LO:
3615 case R_PPC64_TPREL16_HI:
3616 case R_PPC64_TPREL16_HA:
3617 case R_PPC64_TPREL16_DS:
3618 case R_PPC64_TPREL16_LO_DS:
3619 case R_PPC64_TPREL16_HIGH:
3620 case R_PPC64_TPREL16_HIGHA:
3621 case R_PPC64_TPREL16_HIGHER:
3622 case R_PPC64_TPREL16_HIGHERA:
3623 case R_PPC64_TPREL16_HIGHEST:
3624 case R_PPC64_TPREL16_HIGHESTA:
3625 case R_PPC64_TPREL64:
3626 return !info->executable;
3627 }
3628 }
3629
3630 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3631 copying dynamic variables from a shared lib into an app's dynbss
3632 section, and instead use a dynamic relocation to point into the
3633 shared lib. With code that gcc generates, it's vital that this be
3634 enabled; In the PowerPC64 ABI, the address of a function is actually
3635 the address of a function descriptor, which resides in the .opd
3636 section. gcc uses the descriptor directly rather than going via the
3637 GOT as some other ABI's do, which means that initialized function
3638 pointers must reference the descriptor. Thus, a function pointer
3639 initialized to the address of a function in a shared library will
3640 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3641 redefines the function descriptor symbol to point to the copy. This
3642 presents a problem as a plt entry for that function is also
3643 initialized from the function descriptor symbol and the copy reloc
3644 may not be initialized first. */
3645 #define ELIMINATE_COPY_RELOCS 1
3646
3647 /* Section name for stubs is the associated section name plus this
3648 string. */
3649 #define STUB_SUFFIX ".stub"
3650
3651 /* Linker stubs.
3652 ppc_stub_long_branch:
3653 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3654 destination, but a 24 bit branch in a stub section will reach.
3655 . b dest
3656
3657 ppc_stub_plt_branch:
3658 Similar to the above, but a 24 bit branch in the stub section won't
3659 reach its destination.
3660 . addis %r12,%r2,xxx@toc@ha
3661 . ld %r11,xxx@toc@l(%r12)
3662 . mtctr %r11
3663 . bctr
3664
3665 ppc_stub_plt_call:
3666 Used to call a function in a shared library. If it so happens that
3667 the plt entry referenced crosses a 64k boundary, then an extra
3668 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3669 . addis %r12,%r2,xxx@toc@ha
3670 . std %r2,40(%r1)
3671 . ld %r11,xxx+0@toc@l(%r12)
3672 . mtctr %r11
3673 . ld %r2,xxx+8@toc@l(%r12)
3674 . ld %r11,xxx+16@toc@l(%r12)
3675 . bctr
3676
3677 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3678 code to adjust the value and save r2 to support multiple toc sections.
3679 A ppc_stub_long_branch with an r2 offset looks like:
3680 . std %r2,40(%r1)
3681 . addis %r2,%r2,off@ha
3682 . addi %r2,%r2,off@l
3683 . b dest
3684
3685 A ppc_stub_plt_branch with an r2 offset looks like:
3686 . std %r2,40(%r1)
3687 . addis %r12,%r2,xxx@toc@ha
3688 . ld %r11,xxx@toc@l(%r12)
3689 . addis %r2,%r2,off@ha
3690 . addi %r2,%r2,off@l
3691 . mtctr %r11
3692 . bctr
3693
3694 In cases where the "addis" instruction would add zero, the "addis" is
3695 omitted and following instructions modified slightly in some cases.
3696 */
3697
3698 enum ppc_stub_type {
3699 ppc_stub_none,
3700 ppc_stub_long_branch,
3701 ppc_stub_long_branch_r2off,
3702 ppc_stub_plt_branch,
3703 ppc_stub_plt_branch_r2off,
3704 ppc_stub_plt_call,
3705 ppc_stub_plt_call_r2save
3706 };
3707
3708 struct ppc_stub_hash_entry {
3709
3710 /* Base hash table entry structure. */
3711 struct bfd_hash_entry root;
3712
3713 enum ppc_stub_type stub_type;
3714
3715 /* The stub section. */
3716 asection *stub_sec;
3717
3718 /* Offset within stub_sec of the beginning of this stub. */
3719 bfd_vma stub_offset;
3720
3721 /* Given the symbol's value and its section we can determine its final
3722 value when building the stubs (so the stub knows where to jump. */
3723 bfd_vma target_value;
3724 asection *target_section;
3725
3726 /* The symbol table entry, if any, that this was derived from. */
3727 struct ppc_link_hash_entry *h;
3728 struct plt_entry *plt_ent;
3729
3730 /* Where this stub is being called from, or, in the case of combined
3731 stub sections, the first input section in the group. */
3732 asection *id_sec;
3733 };
3734
3735 struct ppc_branch_hash_entry {
3736
3737 /* Base hash table entry structure. */
3738 struct bfd_hash_entry root;
3739
3740 /* Offset within branch lookup table. */
3741 unsigned int offset;
3742
3743 /* Generation marker. */
3744 unsigned int iter;
3745 };
3746
3747 /* Used to track dynamic relocations for local symbols. */
3748 struct ppc_dyn_relocs
3749 {
3750 struct ppc_dyn_relocs *next;
3751
3752 /* The input section of the reloc. */
3753 asection *sec;
3754
3755 /* Total number of relocs copied for the input section. */
3756 unsigned int count : 31;
3757
3758 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3759 unsigned int ifunc : 1;
3760 };
3761
3762 struct ppc_link_hash_entry
3763 {
3764 struct elf_link_hash_entry elf;
3765
3766 union {
3767 /* A pointer to the most recently used stub hash entry against this
3768 symbol. */
3769 struct ppc_stub_hash_entry *stub_cache;
3770
3771 /* A pointer to the next symbol starting with a '.' */
3772 struct ppc_link_hash_entry *next_dot_sym;
3773 } u;
3774
3775 /* Track dynamic relocs copied for this symbol. */
3776 struct elf_dyn_relocs *dyn_relocs;
3777
3778 /* Link between function code and descriptor symbols. */
3779 struct ppc_link_hash_entry *oh;
3780
3781 /* Flag function code and descriptor symbols. */
3782 unsigned int is_func:1;
3783 unsigned int is_func_descriptor:1;
3784 unsigned int fake:1;
3785
3786 /* Whether global opd/toc sym has been adjusted or not.
3787 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3788 should be set for all globals defined in any opd/toc section. */
3789 unsigned int adjust_done:1;
3790
3791 /* Set if we twiddled this symbol to weak at some stage. */
3792 unsigned int was_undefined:1;
3793
3794 /* Contexts in which symbol is used in the GOT (or TOC).
3795 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3796 corresponding relocs are encountered during check_relocs.
3797 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3798 indicate the corresponding GOT entry type is not needed.
3799 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3800 a TPREL one. We use a separate flag rather than setting TPREL
3801 just for convenience in distinguishing the two cases. */
3802 #define TLS_GD 1 /* GD reloc. */
3803 #define TLS_LD 2 /* LD reloc. */
3804 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3805 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3806 #define TLS_TLS 16 /* Any TLS reloc. */
3807 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3808 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3809 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3810 unsigned char tls_mask;
3811 };
3812
3813 /* ppc64 ELF linker hash table. */
3814
3815 struct ppc_link_hash_table
3816 {
3817 struct elf_link_hash_table elf;
3818
3819 /* The stub hash table. */
3820 struct bfd_hash_table stub_hash_table;
3821
3822 /* Another hash table for plt_branch stubs. */
3823 struct bfd_hash_table branch_hash_table;
3824
3825 /* Hash table for function prologue tocsave. */
3826 htab_t tocsave_htab;
3827
3828 /* Linker stub bfd. */
3829 bfd *stub_bfd;
3830
3831 /* Linker call-backs. */
3832 asection * (*add_stub_section) (const char *, asection *);
3833 void (*layout_sections_again) (void);
3834
3835 /* Array to keep track of which stub sections have been created, and
3836 information on stub grouping. */
3837 struct map_stub {
3838 /* This is the section to which stubs in the group will be attached. */
3839 asection *link_sec;
3840 /* The stub section. */
3841 asection *stub_sec;
3842 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3843 bfd_vma toc_off;
3844 } *stub_group;
3845
3846 /* Temp used when calculating TOC pointers. */
3847 bfd_vma toc_curr;
3848 bfd *toc_bfd;
3849 asection *toc_first_sec;
3850
3851 /* Highest input section id. */
3852 int top_id;
3853
3854 /* Highest output section index. */
3855 int top_index;
3856
3857 /* Used when adding symbols. */
3858 struct ppc_link_hash_entry *dot_syms;
3859
3860 /* List of input sections for each output section. */
3861 asection **input_list;
3862
3863 /* Short-cuts to get to dynamic linker sections. */
3864 asection *got;
3865 asection *plt;
3866 asection *relplt;
3867 asection *iplt;
3868 asection *reliplt;
3869 asection *dynbss;
3870 asection *relbss;
3871 asection *glink;
3872 asection *sfpr;
3873 asection *brlt;
3874 asection *relbrlt;
3875 asection *glink_eh_frame;
3876
3877 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3878 struct ppc_link_hash_entry *tls_get_addr;
3879 struct ppc_link_hash_entry *tls_get_addr_fd;
3880
3881 /* The size of reliplt used by got entry relocs. */
3882 bfd_size_type got_reli_size;
3883
3884 /* Statistics. */
3885 unsigned long stub_count[ppc_stub_plt_call_r2save];
3886
3887 /* Number of stubs against global syms. */
3888 unsigned long stub_globals;
3889
3890 /* Alignment of PLT call stubs. */
3891 unsigned int plt_stub_align:4;
3892
3893 /* Set if PLT call stubs should load r11. */
3894 unsigned int plt_static_chain:1;
3895
3896 /* Set if PLT call stubs need a read-read barrier. */
3897 unsigned int plt_thread_safe:1;
3898
3899 /* Set if we should emit symbols for stubs. */
3900 unsigned int emit_stub_syms:1;
3901
3902 /* Set if __tls_get_addr optimization should not be done. */
3903 unsigned int no_tls_get_addr_opt:1;
3904
3905 /* Support for multiple toc sections. */
3906 unsigned int do_multi_toc:1;
3907 unsigned int multi_toc_needed:1;
3908 unsigned int second_toc_pass:1;
3909 unsigned int do_toc_opt:1;
3910
3911 /* Set on error. */
3912 unsigned int stub_error:1;
3913
3914 /* Temp used by ppc64_elf_process_dot_syms. */
3915 unsigned int twiddled_syms:1;
3916
3917 /* Incremented every time we size stubs. */
3918 unsigned int stub_iteration;
3919
3920 /* Small local sym cache. */
3921 struct sym_cache sym_cache;
3922 };
3923
3924 /* Rename some of the generic section flags to better document how they
3925 are used here. */
3926
3927 /* Nonzero if this section has TLS related relocations. */
3928 #define has_tls_reloc sec_flg0
3929
3930 /* Nonzero if this section has a call to __tls_get_addr. */
3931 #define has_tls_get_addr_call sec_flg1
3932
3933 /* Nonzero if this section has any toc or got relocs. */
3934 #define has_toc_reloc sec_flg2
3935
3936 /* Nonzero if this section has a call to another section that uses
3937 the toc or got. */
3938 #define makes_toc_func_call sec_flg3
3939
3940 /* Recursion protection when determining above flag. */
3941 #define call_check_in_progress sec_flg4
3942 #define call_check_done sec_flg5
3943
3944 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3945
3946 #define ppc_hash_table(p) \
3947 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3948 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3949
3950 #define ppc_stub_hash_lookup(table, string, create, copy) \
3951 ((struct ppc_stub_hash_entry *) \
3952 bfd_hash_lookup ((table), (string), (create), (copy)))
3953
3954 #define ppc_branch_hash_lookup(table, string, create, copy) \
3955 ((struct ppc_branch_hash_entry *) \
3956 bfd_hash_lookup ((table), (string), (create), (copy)))
3957
3958 /* Create an entry in the stub hash table. */
3959
3960 static struct bfd_hash_entry *
3961 stub_hash_newfunc (struct bfd_hash_entry *entry,
3962 struct bfd_hash_table *table,
3963 const char *string)
3964 {
3965 /* Allocate the structure if it has not already been allocated by a
3966 subclass. */
3967 if (entry == NULL)
3968 {
3969 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3970 if (entry == NULL)
3971 return entry;
3972 }
3973
3974 /* Call the allocation method of the superclass. */
3975 entry = bfd_hash_newfunc (entry, table, string);
3976 if (entry != NULL)
3977 {
3978 struct ppc_stub_hash_entry *eh;
3979
3980 /* Initialize the local fields. */
3981 eh = (struct ppc_stub_hash_entry *) entry;
3982 eh->stub_type = ppc_stub_none;
3983 eh->stub_sec = NULL;
3984 eh->stub_offset = 0;
3985 eh->target_value = 0;
3986 eh->target_section = NULL;
3987 eh->h = NULL;
3988 eh->id_sec = NULL;
3989 }
3990
3991 return entry;
3992 }
3993
3994 /* Create an entry in the branch hash table. */
3995
3996 static struct bfd_hash_entry *
3997 branch_hash_newfunc (struct bfd_hash_entry *entry,
3998 struct bfd_hash_table *table,
3999 const char *string)
4000 {
4001 /* Allocate the structure if it has not already been allocated by a
4002 subclass. */
4003 if (entry == NULL)
4004 {
4005 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
4006 if (entry == NULL)
4007 return entry;
4008 }
4009
4010 /* Call the allocation method of the superclass. */
4011 entry = bfd_hash_newfunc (entry, table, string);
4012 if (entry != NULL)
4013 {
4014 struct ppc_branch_hash_entry *eh;
4015
4016 /* Initialize the local fields. */
4017 eh = (struct ppc_branch_hash_entry *) entry;
4018 eh->offset = 0;
4019 eh->iter = 0;
4020 }
4021
4022 return entry;
4023 }
4024
4025 /* Create an entry in a ppc64 ELF linker hash table. */
4026
4027 static struct bfd_hash_entry *
4028 link_hash_newfunc (struct bfd_hash_entry *entry,
4029 struct bfd_hash_table *table,
4030 const char *string)
4031 {
4032 /* Allocate the structure if it has not already been allocated by a
4033 subclass. */
4034 if (entry == NULL)
4035 {
4036 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
4037 if (entry == NULL)
4038 return entry;
4039 }
4040
4041 /* Call the allocation method of the superclass. */
4042 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
4043 if (entry != NULL)
4044 {
4045 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
4046
4047 memset (&eh->u.stub_cache, 0,
4048 (sizeof (struct ppc_link_hash_entry)
4049 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
4050
4051 /* When making function calls, old ABI code references function entry
4052 points (dot symbols), while new ABI code references the function
4053 descriptor symbol. We need to make any combination of reference and
4054 definition work together, without breaking archive linking.
4055
4056 For a defined function "foo" and an undefined call to "bar":
4057 An old object defines "foo" and ".foo", references ".bar" (possibly
4058 "bar" too).
4059 A new object defines "foo" and references "bar".
4060
4061 A new object thus has no problem with its undefined symbols being
4062 satisfied by definitions in an old object. On the other hand, the
4063 old object won't have ".bar" satisfied by a new object.
4064
4065 Keep a list of newly added dot-symbols. */
4066
4067 if (string[0] == '.')
4068 {
4069 struct ppc_link_hash_table *htab;
4070
4071 htab = (struct ppc_link_hash_table *) table;
4072 eh->u.next_dot_sym = htab->dot_syms;
4073 htab->dot_syms = eh;
4074 }
4075 }
4076
4077 return entry;
4078 }
4079
4080 struct tocsave_entry {
4081 asection *sec;
4082 bfd_vma offset;
4083 };
4084
4085 static hashval_t
4086 tocsave_htab_hash (const void *p)
4087 {
4088 const struct tocsave_entry *e = (const struct tocsave_entry *) p;
4089 return ((bfd_vma)(intptr_t) e->sec ^ e->offset) >> 3;
4090 }
4091
4092 static int
4093 tocsave_htab_eq (const void *p1, const void *p2)
4094 {
4095 const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1;
4096 const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2;
4097 return e1->sec == e2->sec && e1->offset == e2->offset;
4098 }
4099
4100 /* Create a ppc64 ELF linker hash table. */
4101
4102 static struct bfd_link_hash_table *
4103 ppc64_elf_link_hash_table_create (bfd *abfd)
4104 {
4105 struct ppc_link_hash_table *htab;
4106 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
4107
4108 htab = bfd_zmalloc (amt);
4109 if (htab == NULL)
4110 return NULL;
4111
4112 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
4113 sizeof (struct ppc_link_hash_entry),
4114 PPC64_ELF_DATA))
4115 {
4116 free (htab);
4117 return NULL;
4118 }
4119
4120 /* Init the stub hash table too. */
4121 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
4122 sizeof (struct ppc_stub_hash_entry)))
4123 return NULL;
4124
4125 /* And the branch hash table. */
4126 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
4127 sizeof (struct ppc_branch_hash_entry)))
4128 return NULL;
4129
4130 htab->tocsave_htab = htab_try_create (1024,
4131 tocsave_htab_hash,
4132 tocsave_htab_eq,
4133 NULL);
4134 if (htab->tocsave_htab == NULL)
4135 return NULL;
4136
4137 /* Initializing two fields of the union is just cosmetic. We really
4138 only care about glist, but when compiled on a 32-bit host the
4139 bfd_vma fields are larger. Setting the bfd_vma to zero makes
4140 debugger inspection of these fields look nicer. */
4141 htab->elf.init_got_refcount.refcount = 0;
4142 htab->elf.init_got_refcount.glist = NULL;
4143 htab->elf.init_plt_refcount.refcount = 0;
4144 htab->elf.init_plt_refcount.glist = NULL;
4145 htab->elf.init_got_offset.offset = 0;
4146 htab->elf.init_got_offset.glist = NULL;
4147 htab->elf.init_plt_offset.offset = 0;
4148 htab->elf.init_plt_offset.glist = NULL;
4149
4150 return &htab->elf.root;
4151 }
4152
4153 /* Free the derived linker hash table. */
4154
4155 static void
4156 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4157 {
4158 struct ppc_link_hash_table *htab = (struct ppc_link_hash_table *) hash;
4159
4160 bfd_hash_table_free (&htab->stub_hash_table);
4161 bfd_hash_table_free (&htab->branch_hash_table);
4162 if (htab->tocsave_htab)
4163 htab_delete (htab->tocsave_htab);
4164 _bfd_elf_link_hash_table_free (hash);
4165 }
4166
4167 /* Create sections for linker generated code. */
4168
4169 static bfd_boolean
4170 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4171 {
4172 struct ppc_link_hash_table *htab;
4173 flagword flags;
4174
4175 htab = ppc_hash_table (info);
4176
4177 /* Create .sfpr for code to save and restore fp regs. */
4178 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4179 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4180 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4181 flags);
4182 if (htab->sfpr == NULL
4183 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4184 return FALSE;
4185
4186 /* Create .glink for lazy dynamic linking support. */
4187 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4188 flags);
4189 if (htab->glink == NULL
4190 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4191 return FALSE;
4192
4193 if (!info->no_ld_generated_unwind_info)
4194 {
4195 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4196 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4197 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4198 ".eh_frame",
4199 flags);
4200 if (htab->glink_eh_frame == NULL
4201 || !bfd_set_section_alignment (dynobj, htab->glink_eh_frame, 2))
4202 return FALSE;
4203 }
4204
4205 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4206 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4207 if (htab->iplt == NULL
4208 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4209 return FALSE;
4210
4211 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4212 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4213 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4214 ".rela.iplt",
4215 flags);
4216 if (htab->reliplt == NULL
4217 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4218 return FALSE;
4219
4220 /* Create branch lookup table for plt_branch stubs. */
4221 flags = (SEC_ALLOC | SEC_LOAD
4222 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4223 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4224 flags);
4225 if (htab->brlt == NULL
4226 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4227 return FALSE;
4228
4229 if (!info->shared)
4230 return TRUE;
4231
4232 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4233 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4234 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4235 ".rela.branch_lt",
4236 flags);
4237 if (htab->relbrlt == NULL
4238 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4239 return FALSE;
4240
4241 return TRUE;
4242 }
4243
4244 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4245
4246 bfd_boolean
4247 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4248 {
4249 struct ppc_link_hash_table *htab;
4250
4251 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4252
4253 /* Always hook our dynamic sections into the first bfd, which is the
4254 linker created stub bfd. This ensures that the GOT header is at
4255 the start of the output TOC section. */
4256 htab = ppc_hash_table (info);
4257 if (htab == NULL)
4258 return FALSE;
4259 htab->stub_bfd = abfd;
4260 htab->elf.dynobj = abfd;
4261
4262 if (info->relocatable)
4263 return TRUE;
4264
4265 return create_linkage_sections (htab->elf.dynobj, info);
4266 }
4267
4268 /* Build a name for an entry in the stub hash table. */
4269
4270 static char *
4271 ppc_stub_name (const asection *input_section,
4272 const asection *sym_sec,
4273 const struct ppc_link_hash_entry *h,
4274 const Elf_Internal_Rela *rel)
4275 {
4276 char *stub_name;
4277 ssize_t len;
4278
4279 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4280 offsets from a sym as a branch target? In fact, we could
4281 probably assume the addend is always zero. */
4282 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4283
4284 if (h)
4285 {
4286 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4287 stub_name = bfd_malloc (len);
4288 if (stub_name == NULL)
4289 return stub_name;
4290
4291 len = sprintf (stub_name, "%08x.%s+%x",
4292 input_section->id & 0xffffffff,
4293 h->elf.root.root.string,
4294 (int) rel->r_addend & 0xffffffff);
4295 }
4296 else
4297 {
4298 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4299 stub_name = bfd_malloc (len);
4300 if (stub_name == NULL)
4301 return stub_name;
4302
4303 len = sprintf (stub_name, "%08x.%x:%x+%x",
4304 input_section->id & 0xffffffff,
4305 sym_sec->id & 0xffffffff,
4306 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4307 (int) rel->r_addend & 0xffffffff);
4308 }
4309 if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4310 stub_name[len - 2] = 0;
4311 return stub_name;
4312 }
4313
4314 /* Look up an entry in the stub hash. Stub entries are cached because
4315 creating the stub name takes a bit of time. */
4316
4317 static struct ppc_stub_hash_entry *
4318 ppc_get_stub_entry (const asection *input_section,
4319 const asection *sym_sec,
4320 struct ppc_link_hash_entry *h,
4321 const Elf_Internal_Rela *rel,
4322 struct ppc_link_hash_table *htab)
4323 {
4324 struct ppc_stub_hash_entry *stub_entry;
4325 const asection *id_sec;
4326
4327 /* If this input section is part of a group of sections sharing one
4328 stub section, then use the id of the first section in the group.
4329 Stub names need to include a section id, as there may well be
4330 more than one stub used to reach say, printf, and we need to
4331 distinguish between them. */
4332 id_sec = htab->stub_group[input_section->id].link_sec;
4333
4334 if (h != NULL && h->u.stub_cache != NULL
4335 && h->u.stub_cache->h == h
4336 && h->u.stub_cache->id_sec == id_sec)
4337 {
4338 stub_entry = h->u.stub_cache;
4339 }
4340 else
4341 {
4342 char *stub_name;
4343
4344 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4345 if (stub_name == NULL)
4346 return NULL;
4347
4348 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4349 stub_name, FALSE, FALSE);
4350 if (h != NULL)
4351 h->u.stub_cache = stub_entry;
4352
4353 free (stub_name);
4354 }
4355
4356 return stub_entry;
4357 }
4358
4359 /* Add a new stub entry to the stub hash. Not all fields of the new
4360 stub entry are initialised. */
4361
4362 static struct ppc_stub_hash_entry *
4363 ppc_add_stub (const char *stub_name,
4364 asection *section,
4365 struct bfd_link_info *info)
4366 {
4367 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4368 asection *link_sec;
4369 asection *stub_sec;
4370 struct ppc_stub_hash_entry *stub_entry;
4371
4372 link_sec = htab->stub_group[section->id].link_sec;
4373 stub_sec = htab->stub_group[section->id].stub_sec;
4374 if (stub_sec == NULL)
4375 {
4376 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4377 if (stub_sec == NULL)
4378 {
4379 size_t namelen;
4380 bfd_size_type len;
4381 char *s_name;
4382
4383 namelen = strlen (link_sec->name);
4384 len = namelen + sizeof (STUB_SUFFIX);
4385 s_name = bfd_alloc (htab->stub_bfd, len);
4386 if (s_name == NULL)
4387 return NULL;
4388
4389 memcpy (s_name, link_sec->name, namelen);
4390 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4391 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4392 if (stub_sec == NULL)
4393 return NULL;
4394 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4395 }
4396 htab->stub_group[section->id].stub_sec = stub_sec;
4397 }
4398
4399 /* Enter this entry into the linker stub hash table. */
4400 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4401 TRUE, FALSE);
4402 if (stub_entry == NULL)
4403 {
4404 info->callbacks->einfo (_("%P: %B: cannot create stub entry %s\n"),
4405 section->owner, stub_name);
4406 return NULL;
4407 }
4408
4409 stub_entry->stub_sec = stub_sec;
4410 stub_entry->stub_offset = 0;
4411 stub_entry->id_sec = link_sec;
4412 return stub_entry;
4413 }
4414
4415 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4416 not already done. */
4417
4418 static bfd_boolean
4419 create_got_section (bfd *abfd, struct bfd_link_info *info)
4420 {
4421 asection *got, *relgot;
4422 flagword flags;
4423 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4424
4425 if (!is_ppc64_elf (abfd))
4426 return FALSE;
4427 if (htab == NULL)
4428 return FALSE;
4429
4430 if (!htab->got)
4431 {
4432 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4433 return FALSE;
4434
4435 htab->got = bfd_get_linker_section (htab->elf.dynobj, ".got");
4436 if (!htab->got)
4437 abort ();
4438 }
4439
4440 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4441 | SEC_LINKER_CREATED);
4442
4443 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4444 if (!got
4445 || !bfd_set_section_alignment (abfd, got, 3))
4446 return FALSE;
4447
4448 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4449 flags | SEC_READONLY);
4450 if (!relgot
4451 || ! bfd_set_section_alignment (abfd, relgot, 3))
4452 return FALSE;
4453
4454 ppc64_elf_tdata (abfd)->got = got;
4455 ppc64_elf_tdata (abfd)->relgot = relgot;
4456 return TRUE;
4457 }
4458
4459 /* Create the dynamic sections, and set up shortcuts. */
4460
4461 static bfd_boolean
4462 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4463 {
4464 struct ppc_link_hash_table *htab;
4465
4466 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4467 return FALSE;
4468
4469 htab = ppc_hash_table (info);
4470 if (htab == NULL)
4471 return FALSE;
4472
4473 if (!htab->got)
4474 htab->got = bfd_get_linker_section (dynobj, ".got");
4475 htab->plt = bfd_get_linker_section (dynobj, ".plt");
4476 htab->relplt = bfd_get_linker_section (dynobj, ".rela.plt");
4477 htab->dynbss = bfd_get_linker_section (dynobj, ".dynbss");
4478 if (!info->shared)
4479 htab->relbss = bfd_get_linker_section (dynobj, ".rela.bss");
4480
4481 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4482 || (!info->shared && !htab->relbss))
4483 abort ();
4484
4485 return TRUE;
4486 }
4487
4488 /* Follow indirect and warning symbol links. */
4489
4490 static inline struct bfd_link_hash_entry *
4491 follow_link (struct bfd_link_hash_entry *h)
4492 {
4493 while (h->type == bfd_link_hash_indirect
4494 || h->type == bfd_link_hash_warning)
4495 h = h->u.i.link;
4496 return h;
4497 }
4498
4499 static inline struct elf_link_hash_entry *
4500 elf_follow_link (struct elf_link_hash_entry *h)
4501 {
4502 return (struct elf_link_hash_entry *) follow_link (&h->root);
4503 }
4504
4505 static inline struct ppc_link_hash_entry *
4506 ppc_follow_link (struct ppc_link_hash_entry *h)
4507 {
4508 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4509 }
4510
4511 /* Merge PLT info on FROM with that on TO. */
4512
4513 static void
4514 move_plt_plist (struct ppc_link_hash_entry *from,
4515 struct ppc_link_hash_entry *to)
4516 {
4517 if (from->elf.plt.plist != NULL)
4518 {
4519 if (to->elf.plt.plist != NULL)
4520 {
4521 struct plt_entry **entp;
4522 struct plt_entry *ent;
4523
4524 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4525 {
4526 struct plt_entry *dent;
4527
4528 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4529 if (dent->addend == ent->addend)
4530 {
4531 dent->plt.refcount += ent->plt.refcount;
4532 *entp = ent->next;
4533 break;
4534 }
4535 if (dent == NULL)
4536 entp = &ent->next;
4537 }
4538 *entp = to->elf.plt.plist;
4539 }
4540
4541 to->elf.plt.plist = from->elf.plt.plist;
4542 from->elf.plt.plist = NULL;
4543 }
4544 }
4545
4546 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4547
4548 static void
4549 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4550 struct elf_link_hash_entry *dir,
4551 struct elf_link_hash_entry *ind)
4552 {
4553 struct ppc_link_hash_entry *edir, *eind;
4554
4555 edir = (struct ppc_link_hash_entry *) dir;
4556 eind = (struct ppc_link_hash_entry *) ind;
4557
4558 edir->is_func |= eind->is_func;
4559 edir->is_func_descriptor |= eind->is_func_descriptor;
4560 edir->tls_mask |= eind->tls_mask;
4561 if (eind->oh != NULL)
4562 edir->oh = ppc_follow_link (eind->oh);
4563
4564 /* If called to transfer flags for a weakdef during processing
4565 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4566 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4567 if (!(ELIMINATE_COPY_RELOCS
4568 && eind->elf.root.type != bfd_link_hash_indirect
4569 && edir->elf.dynamic_adjusted))
4570 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4571
4572 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4573 edir->elf.ref_regular |= eind->elf.ref_regular;
4574 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4575 edir->elf.needs_plt |= eind->elf.needs_plt;
4576
4577 /* Copy over any dynamic relocs we may have on the indirect sym. */
4578 if (eind->dyn_relocs != NULL)
4579 {
4580 if (edir->dyn_relocs != NULL)
4581 {
4582 struct elf_dyn_relocs **pp;
4583 struct elf_dyn_relocs *p;
4584
4585 /* Add reloc counts against the indirect sym to the direct sym
4586 list. Merge any entries against the same section. */
4587 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4588 {
4589 struct elf_dyn_relocs *q;
4590
4591 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4592 if (q->sec == p->sec)
4593 {
4594 q->pc_count += p->pc_count;
4595 q->count += p->count;
4596 *pp = p->next;
4597 break;
4598 }
4599 if (q == NULL)
4600 pp = &p->next;
4601 }
4602 *pp = edir->dyn_relocs;
4603 }
4604
4605 edir->dyn_relocs = eind->dyn_relocs;
4606 eind->dyn_relocs = NULL;
4607 }
4608
4609 /* If we were called to copy over info for a weak sym, that's all.
4610 You might think dyn_relocs need not be copied over; After all,
4611 both syms will be dynamic or both non-dynamic so we're just
4612 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
4613 code in ppc64_elf_adjust_dynamic_symbol needs to check for
4614 dyn_relocs in read-only sections, and it does so on what is the
4615 DIR sym here. */
4616 if (eind->elf.root.type != bfd_link_hash_indirect)
4617 return;
4618
4619 /* Copy over got entries that we may have already seen to the
4620 symbol which just became indirect. */
4621 if (eind->elf.got.glist != NULL)
4622 {
4623 if (edir->elf.got.glist != NULL)
4624 {
4625 struct got_entry **entp;
4626 struct got_entry *ent;
4627
4628 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4629 {
4630 struct got_entry *dent;
4631
4632 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4633 if (dent->addend == ent->addend
4634 && dent->owner == ent->owner
4635 && dent->tls_type == ent->tls_type)
4636 {
4637 dent->got.refcount += ent->got.refcount;
4638 *entp = ent->next;
4639 break;
4640 }
4641 if (dent == NULL)
4642 entp = &ent->next;
4643 }
4644 *entp = edir->elf.got.glist;
4645 }
4646
4647 edir->elf.got.glist = eind->elf.got.glist;
4648 eind->elf.got.glist = NULL;
4649 }
4650
4651 /* And plt entries. */
4652 move_plt_plist (eind, edir);
4653
4654 if (eind->elf.dynindx != -1)
4655 {
4656 if (edir->elf.dynindx != -1)
4657 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4658 edir->elf.dynstr_index);
4659 edir->elf.dynindx = eind->elf.dynindx;
4660 edir->elf.dynstr_index = eind->elf.dynstr_index;
4661 eind->elf.dynindx = -1;
4662 eind->elf.dynstr_index = 0;
4663 }
4664 }
4665
4666 /* Find the function descriptor hash entry from the given function code
4667 hash entry FH. Link the entries via their OH fields. */
4668
4669 static struct ppc_link_hash_entry *
4670 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4671 {
4672 struct ppc_link_hash_entry *fdh = fh->oh;
4673
4674 if (fdh == NULL)
4675 {
4676 const char *fd_name = fh->elf.root.root.string + 1;
4677
4678 fdh = (struct ppc_link_hash_entry *)
4679 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4680 if (fdh == NULL)
4681 return fdh;
4682
4683 fdh->is_func_descriptor = 1;
4684 fdh->oh = fh;
4685 fh->is_func = 1;
4686 fh->oh = fdh;
4687 }
4688
4689 return ppc_follow_link (fdh);
4690 }
4691
4692 /* Make a fake function descriptor sym for the code sym FH. */
4693
4694 static struct ppc_link_hash_entry *
4695 make_fdh (struct bfd_link_info *info,
4696 struct ppc_link_hash_entry *fh)
4697 {
4698 bfd *abfd;
4699 asymbol *newsym;
4700 struct bfd_link_hash_entry *bh;
4701 struct ppc_link_hash_entry *fdh;
4702
4703 abfd = fh->elf.root.u.undef.abfd;
4704 newsym = bfd_make_empty_symbol (abfd);
4705 newsym->name = fh->elf.root.root.string + 1;
4706 newsym->section = bfd_und_section_ptr;
4707 newsym->value = 0;
4708 newsym->flags = BSF_WEAK;
4709
4710 bh = NULL;
4711 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4712 newsym->flags, newsym->section,
4713 newsym->value, NULL, FALSE, FALSE,
4714 &bh))
4715 return NULL;
4716
4717 fdh = (struct ppc_link_hash_entry *) bh;
4718 fdh->elf.non_elf = 0;
4719 fdh->fake = 1;
4720 fdh->is_func_descriptor = 1;
4721 fdh->oh = fh;
4722 fh->is_func = 1;
4723 fh->oh = fdh;
4724 return fdh;
4725 }
4726
4727 /* Fix function descriptor symbols defined in .opd sections to be
4728 function type. */
4729
4730 static bfd_boolean
4731 ppc64_elf_add_symbol_hook (bfd *ibfd,
4732 struct bfd_link_info *info,
4733 Elf_Internal_Sym *isym,
4734 const char **name ATTRIBUTE_UNUSED,
4735 flagword *flags ATTRIBUTE_UNUSED,
4736 asection **sec,
4737 bfd_vma *value ATTRIBUTE_UNUSED)
4738 {
4739 if ((ibfd->flags & DYNAMIC) == 0
4740 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4741 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4742
4743 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4744 {
4745 if ((ibfd->flags & DYNAMIC) == 0)
4746 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4747 }
4748 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4749 ;
4750 else if (*sec != NULL
4751 && strcmp ((*sec)->name, ".opd") == 0)
4752 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4753
4754 return TRUE;
4755 }
4756
4757 /* This function makes an old ABI object reference to ".bar" cause the
4758 inclusion of a new ABI object archive that defines "bar".
4759 NAME is a symbol defined in an archive. Return a symbol in the hash
4760 table that might be satisfied by the archive symbols. */
4761
4762 static struct elf_link_hash_entry *
4763 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4764 struct bfd_link_info *info,
4765 const char *name)
4766 {
4767 struct elf_link_hash_entry *h;
4768 char *dot_name;
4769 size_t len;
4770
4771 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4772 if (h != NULL
4773 /* Don't return this sym if it is a fake function descriptor
4774 created by add_symbol_adjust. */
4775 && !(h->root.type == bfd_link_hash_undefweak
4776 && ((struct ppc_link_hash_entry *) h)->fake))
4777 return h;
4778
4779 if (name[0] == '.')
4780 return h;
4781
4782 len = strlen (name);
4783 dot_name = bfd_alloc (abfd, len + 2);
4784 if (dot_name == NULL)
4785 return (struct elf_link_hash_entry *) 0 - 1;
4786 dot_name[0] = '.';
4787 memcpy (dot_name + 1, name, len + 1);
4788 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4789 bfd_release (abfd, dot_name);
4790 return h;
4791 }
4792
4793 /* This function satisfies all old ABI object references to ".bar" if a
4794 new ABI object defines "bar". Well, at least, undefined dot symbols
4795 are made weak. This stops later archive searches from including an
4796 object if we already have a function descriptor definition. It also
4797 prevents the linker complaining about undefined symbols.
4798 We also check and correct mismatched symbol visibility here. The
4799 most restrictive visibility of the function descriptor and the
4800 function entry symbol is used. */
4801
4802 static bfd_boolean
4803 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4804 {
4805 struct ppc_link_hash_table *htab;
4806 struct ppc_link_hash_entry *fdh;
4807
4808 if (eh->elf.root.type == bfd_link_hash_indirect)
4809 return TRUE;
4810
4811 if (eh->elf.root.type == bfd_link_hash_warning)
4812 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4813
4814 if (eh->elf.root.root.string[0] != '.')
4815 abort ();
4816
4817 htab = ppc_hash_table (info);
4818 if (htab == NULL)
4819 return FALSE;
4820
4821 fdh = lookup_fdh (eh, htab);
4822 if (fdh == NULL)
4823 {
4824 if (!info->relocatable
4825 && (eh->elf.root.type == bfd_link_hash_undefined
4826 || eh->elf.root.type == bfd_link_hash_undefweak)
4827 && eh->elf.ref_regular)
4828 {
4829 /* Make an undefweak function descriptor sym, which is enough to
4830 pull in an --as-needed shared lib, but won't cause link
4831 errors. Archives are handled elsewhere. */
4832 fdh = make_fdh (info, eh);
4833 if (fdh == NULL)
4834 return FALSE;
4835 fdh->elf.ref_regular = 1;
4836 }
4837 }
4838 else
4839 {
4840 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4841 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4842 if (entry_vis < descr_vis)
4843 fdh->elf.other += entry_vis - descr_vis;
4844 else if (entry_vis > descr_vis)
4845 eh->elf.other += descr_vis - entry_vis;
4846
4847 if ((fdh->elf.root.type == bfd_link_hash_defined
4848 || fdh->elf.root.type == bfd_link_hash_defweak)
4849 && eh->elf.root.type == bfd_link_hash_undefined)
4850 {
4851 eh->elf.root.type = bfd_link_hash_undefweak;
4852 eh->was_undefined = 1;
4853 htab->twiddled_syms = 1;
4854 }
4855 }
4856
4857 return TRUE;
4858 }
4859
4860 /* Process list of dot-symbols we made in link_hash_newfunc. */
4861
4862 static bfd_boolean
4863 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4864 {
4865 struct ppc_link_hash_table *htab;
4866 struct ppc_link_hash_entry **p, *eh;
4867
4868 if (!is_ppc64_elf (info->output_bfd))
4869 return TRUE;
4870 htab = ppc_hash_table (info);
4871 if (htab == NULL)
4872 return FALSE;
4873
4874 if (is_ppc64_elf (ibfd))
4875 {
4876 p = &htab->dot_syms;
4877 while ((eh = *p) != NULL)
4878 {
4879 *p = NULL;
4880 if (&eh->elf == htab->elf.hgot)
4881 ;
4882 else if (htab->elf.hgot == NULL
4883 && strcmp (eh->elf.root.root.string, ".TOC.") == 0)
4884 htab->elf.hgot = &eh->elf;
4885 else if (!add_symbol_adjust (eh, info))
4886 return FALSE;
4887 p = &eh->u.next_dot_sym;
4888 }
4889 }
4890
4891 /* Clear the list for non-ppc64 input files. */
4892 p = &htab->dot_syms;
4893 while ((eh = *p) != NULL)
4894 {
4895 *p = NULL;
4896 p = &eh->u.next_dot_sym;
4897 }
4898
4899 /* We need to fix the undefs list for any syms we have twiddled to
4900 undef_weak. */
4901 if (htab->twiddled_syms)
4902 {
4903 bfd_link_repair_undef_list (&htab->elf.root);
4904 htab->twiddled_syms = 0;
4905 }
4906 return TRUE;
4907 }
4908
4909 /* Undo hash table changes when an --as-needed input file is determined
4910 not to be needed. */
4911
4912 static bfd_boolean
4913 ppc64_elf_notice_as_needed (bfd *ibfd,
4914 struct bfd_link_info *info,
4915 enum notice_asneeded_action act)
4916 {
4917 if (act == notice_not_needed)
4918 {
4919 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4920
4921 if (htab == NULL)
4922 return FALSE;
4923
4924 htab->dot_syms = NULL;
4925 }
4926 return _bfd_elf_notice_as_needed (ibfd, info, act);
4927 }
4928
4929 /* If --just-symbols against a final linked binary, then assume we need
4930 toc adjusting stubs when calling functions defined there. */
4931
4932 static void
4933 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4934 {
4935 if ((sec->flags & SEC_CODE) != 0
4936 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4937 && is_ppc64_elf (sec->owner))
4938 {
4939 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4940 if (got != NULL
4941 && got->size >= elf_backend_got_header_size
4942 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4943 sec->has_toc_reloc = 1;
4944 }
4945 _bfd_elf_link_just_syms (sec, info);
4946 }
4947
4948 static struct plt_entry **
4949 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4950 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4951 {
4952 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4953 struct plt_entry **local_plt;
4954 unsigned char *local_got_tls_masks;
4955
4956 if (local_got_ents == NULL)
4957 {
4958 bfd_size_type size = symtab_hdr->sh_info;
4959
4960 size *= (sizeof (*local_got_ents)
4961 + sizeof (*local_plt)
4962 + sizeof (*local_got_tls_masks));
4963 local_got_ents = bfd_zalloc (abfd, size);
4964 if (local_got_ents == NULL)
4965 return NULL;
4966 elf_local_got_ents (abfd) = local_got_ents;
4967 }
4968
4969 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4970 {
4971 struct got_entry *ent;
4972
4973 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4974 if (ent->addend == r_addend
4975 && ent->owner == abfd
4976 && ent->tls_type == tls_type)
4977 break;
4978 if (ent == NULL)
4979 {
4980 bfd_size_type amt = sizeof (*ent);
4981 ent = bfd_alloc (abfd, amt);
4982 if (ent == NULL)
4983 return FALSE;
4984 ent->next = local_got_ents[r_symndx];
4985 ent->addend = r_addend;
4986 ent->owner = abfd;
4987 ent->tls_type = tls_type;
4988 ent->is_indirect = FALSE;
4989 ent->got.refcount = 0;
4990 local_got_ents[r_symndx] = ent;
4991 }
4992 ent->got.refcount += 1;
4993 }
4994
4995 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4996 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4997 local_got_tls_masks[r_symndx] |= tls_type;
4998
4999 return local_plt + r_symndx;
5000 }
5001
5002 static bfd_boolean
5003 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
5004 {
5005 struct plt_entry *ent;
5006
5007 for (ent = *plist; ent != NULL; ent = ent->next)
5008 if (ent->addend == addend)
5009 break;
5010 if (ent == NULL)
5011 {
5012 bfd_size_type amt = sizeof (*ent);
5013 ent = bfd_alloc (abfd, amt);
5014 if (ent == NULL)
5015 return FALSE;
5016 ent->next = *plist;
5017 ent->addend = addend;
5018 ent->plt.refcount = 0;
5019 *plist = ent;
5020 }
5021 ent->plt.refcount += 1;
5022 return TRUE;
5023 }
5024
5025 static bfd_boolean
5026 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
5027 {
5028 return (r_type == R_PPC64_REL24
5029 || r_type == R_PPC64_REL14
5030 || r_type == R_PPC64_REL14_BRTAKEN
5031 || r_type == R_PPC64_REL14_BRNTAKEN
5032 || r_type == R_PPC64_ADDR24
5033 || r_type == R_PPC64_ADDR14
5034 || r_type == R_PPC64_ADDR14_BRTAKEN
5035 || r_type == R_PPC64_ADDR14_BRNTAKEN);
5036 }
5037
5038 /* Look through the relocs for a section during the first phase, and
5039 calculate needed space in the global offset table, procedure
5040 linkage table, and dynamic reloc sections. */
5041
5042 static bfd_boolean
5043 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
5044 asection *sec, const Elf_Internal_Rela *relocs)
5045 {
5046 struct ppc_link_hash_table *htab;
5047 Elf_Internal_Shdr *symtab_hdr;
5048 struct elf_link_hash_entry **sym_hashes;
5049 const Elf_Internal_Rela *rel;
5050 const Elf_Internal_Rela *rel_end;
5051 asection *sreloc;
5052 asection **opd_sym_map;
5053 struct elf_link_hash_entry *tga, *dottga;
5054
5055 if (info->relocatable)
5056 return TRUE;
5057
5058 /* Don't do anything special with non-loaded, non-alloced sections.
5059 In particular, any relocs in such sections should not affect GOT
5060 and PLT reference counting (ie. we don't allow them to create GOT
5061 or PLT entries), there's no possibility or desire to optimize TLS
5062 relocs, and there's not much point in propagating relocs to shared
5063 libs that the dynamic linker won't relocate. */
5064 if ((sec->flags & SEC_ALLOC) == 0)
5065 return TRUE;
5066
5067 BFD_ASSERT (is_ppc64_elf (abfd));
5068
5069 htab = ppc_hash_table (info);
5070 if (htab == NULL)
5071 return FALSE;
5072
5073 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5074 FALSE, FALSE, TRUE);
5075 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
5076 FALSE, FALSE, TRUE);
5077 symtab_hdr = &elf_symtab_hdr (abfd);
5078 sym_hashes = elf_sym_hashes (abfd);
5079 sreloc = NULL;
5080 opd_sym_map = NULL;
5081 if (strcmp (sec->name, ".opd") == 0)
5082 {
5083 /* Garbage collection needs some extra help with .opd sections.
5084 We don't want to necessarily keep everything referenced by
5085 relocs in .opd, as that would keep all functions. Instead,
5086 if we reference an .opd symbol (a function descriptor), we
5087 want to keep the function code symbol's section. This is
5088 easy for global symbols, but for local syms we need to keep
5089 information about the associated function section. */
5090 bfd_size_type amt;
5091
5092 amt = sec->size * sizeof (*opd_sym_map) / 8;
5093 opd_sym_map = bfd_zalloc (abfd, amt);
5094 if (opd_sym_map == NULL)
5095 return FALSE;
5096 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
5097 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
5098 ppc64_elf_section_data (sec)->sec_type = sec_opd;
5099 }
5100
5101 rel_end = relocs + sec->reloc_count;
5102 for (rel = relocs; rel < rel_end; rel++)
5103 {
5104 unsigned long r_symndx;
5105 struct elf_link_hash_entry *h;
5106 enum elf_ppc64_reloc_type r_type;
5107 int tls_type;
5108 struct _ppc64_elf_section_data *ppc64_sec;
5109 struct plt_entry **ifunc;
5110
5111 r_symndx = ELF64_R_SYM (rel->r_info);
5112 if (r_symndx < symtab_hdr->sh_info)
5113 h = NULL;
5114 else
5115 {
5116 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5117 h = elf_follow_link (h);
5118
5119 /* PR15323, ref flags aren't set for references in the same
5120 object. */
5121 h->root.non_ir_ref = 1;
5122
5123 if (h == htab->elf.hgot)
5124 sec->has_toc_reloc = 1;
5125 }
5126
5127 tls_type = 0;
5128 ifunc = NULL;
5129 if (h != NULL)
5130 {
5131 if (h->type == STT_GNU_IFUNC)
5132 {
5133 h->needs_plt = 1;
5134 ifunc = &h->plt.plist;
5135 }
5136 }
5137 else
5138 {
5139 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5140 abfd, r_symndx);
5141 if (isym == NULL)
5142 return FALSE;
5143
5144 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5145 {
5146 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
5147 rel->r_addend, PLT_IFUNC);
5148 if (ifunc == NULL)
5149 return FALSE;
5150 }
5151 }
5152 r_type = ELF64_R_TYPE (rel->r_info);
5153 if (is_branch_reloc (r_type))
5154 {
5155 if (h != NULL && (h == tga || h == dottga))
5156 {
5157 if (rel != relocs
5158 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
5159 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
5160 /* We have a new-style __tls_get_addr call with a marker
5161 reloc. */
5162 ;
5163 else
5164 /* Mark this section as having an old-style call. */
5165 sec->has_tls_get_addr_call = 1;
5166 }
5167
5168 /* STT_GNU_IFUNC symbols must have a PLT entry. */
5169 if (ifunc != NULL
5170 && !update_plt_info (abfd, ifunc, rel->r_addend))
5171 return FALSE;
5172 }
5173
5174 switch (r_type)
5175 {
5176 case R_PPC64_TLSGD:
5177 case R_PPC64_TLSLD:
5178 /* These special tls relocs tie a call to __tls_get_addr with
5179 its parameter symbol. */
5180 break;
5181
5182 case R_PPC64_GOT_TLSLD16:
5183 case R_PPC64_GOT_TLSLD16_LO:
5184 case R_PPC64_GOT_TLSLD16_HI:
5185 case R_PPC64_GOT_TLSLD16_HA:
5186 tls_type = TLS_TLS | TLS_LD;
5187 goto dogottls;
5188
5189 case R_PPC64_GOT_TLSGD16:
5190 case R_PPC64_GOT_TLSGD16_LO:
5191 case R_PPC64_GOT_TLSGD16_HI:
5192 case R_PPC64_GOT_TLSGD16_HA:
5193 tls_type = TLS_TLS | TLS_GD;
5194 goto dogottls;
5195
5196 case R_PPC64_GOT_TPREL16_DS:
5197 case R_PPC64_GOT_TPREL16_LO_DS:
5198 case R_PPC64_GOT_TPREL16_HI:
5199 case R_PPC64_GOT_TPREL16_HA:
5200 if (!info->executable)
5201 info->flags |= DF_STATIC_TLS;
5202 tls_type = TLS_TLS | TLS_TPREL;
5203 goto dogottls;
5204
5205 case R_PPC64_GOT_DTPREL16_DS:
5206 case R_PPC64_GOT_DTPREL16_LO_DS:
5207 case R_PPC64_GOT_DTPREL16_HI:
5208 case R_PPC64_GOT_DTPREL16_HA:
5209 tls_type = TLS_TLS | TLS_DTPREL;
5210 dogottls:
5211 sec->has_tls_reloc = 1;
5212 /* Fall thru */
5213
5214 case R_PPC64_GOT16:
5215 case R_PPC64_GOT16_DS:
5216 case R_PPC64_GOT16_HA:
5217 case R_PPC64_GOT16_HI:
5218 case R_PPC64_GOT16_LO:
5219 case R_PPC64_GOT16_LO_DS:
5220 /* This symbol requires a global offset table entry. */
5221 sec->has_toc_reloc = 1;
5222 if (r_type == R_PPC64_GOT_TLSLD16
5223 || r_type == R_PPC64_GOT_TLSGD16
5224 || r_type == R_PPC64_GOT_TPREL16_DS
5225 || r_type == R_PPC64_GOT_DTPREL16_DS
5226 || r_type == R_PPC64_GOT16
5227 || r_type == R_PPC64_GOT16_DS)
5228 {
5229 htab->do_multi_toc = 1;
5230 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5231 }
5232
5233 if (ppc64_elf_tdata (abfd)->got == NULL
5234 && !create_got_section (abfd, info))
5235 return FALSE;
5236
5237 if (h != NULL)
5238 {
5239 struct ppc_link_hash_entry *eh;
5240 struct got_entry *ent;
5241
5242 eh = (struct ppc_link_hash_entry *) h;
5243 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5244 if (ent->addend == rel->r_addend
5245 && ent->owner == abfd
5246 && ent->tls_type == tls_type)
5247 break;
5248 if (ent == NULL)
5249 {
5250 bfd_size_type amt = sizeof (*ent);
5251 ent = bfd_alloc (abfd, amt);
5252 if (ent == NULL)
5253 return FALSE;
5254 ent->next = eh->elf.got.glist;
5255 ent->addend = rel->r_addend;
5256 ent->owner = abfd;
5257 ent->tls_type = tls_type;
5258 ent->is_indirect = FALSE;
5259 ent->got.refcount = 0;
5260 eh->elf.got.glist = ent;
5261 }
5262 ent->got.refcount += 1;
5263 eh->tls_mask |= tls_type;
5264 }
5265 else
5266 /* This is a global offset table entry for a local symbol. */
5267 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5268 rel->r_addend, tls_type))
5269 return FALSE;
5270 break;
5271
5272 case R_PPC64_PLT16_HA:
5273 case R_PPC64_PLT16_HI:
5274 case R_PPC64_PLT16_LO:
5275 case R_PPC64_PLT32:
5276 case R_PPC64_PLT64:
5277 /* This symbol requires a procedure linkage table entry. We
5278 actually build the entry in adjust_dynamic_symbol,
5279 because this might be a case of linking PIC code without
5280 linking in any dynamic objects, in which case we don't
5281 need to generate a procedure linkage table after all. */
5282 if (h == NULL)
5283 {
5284 /* It does not make sense to have a procedure linkage
5285 table entry for a local symbol. */
5286 bfd_set_error (bfd_error_bad_value);
5287 return FALSE;
5288 }
5289 else
5290 {
5291 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5292 return FALSE;
5293 h->needs_plt = 1;
5294 if (h->root.root.string[0] == '.'
5295 && h->root.root.string[1] != '\0')
5296 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5297 }
5298 break;
5299
5300 /* The following relocations don't need to propagate the
5301 relocation if linking a shared object since they are
5302 section relative. */
5303 case R_PPC64_SECTOFF:
5304 case R_PPC64_SECTOFF_LO:
5305 case R_PPC64_SECTOFF_HI:
5306 case R_PPC64_SECTOFF_HA:
5307 case R_PPC64_SECTOFF_DS:
5308 case R_PPC64_SECTOFF_LO_DS:
5309 case R_PPC64_DTPREL16:
5310 case R_PPC64_DTPREL16_LO:
5311 case R_PPC64_DTPREL16_HI:
5312 case R_PPC64_DTPREL16_HA:
5313 case R_PPC64_DTPREL16_DS:
5314 case R_PPC64_DTPREL16_LO_DS:
5315 case R_PPC64_DTPREL16_HIGH:
5316 case R_PPC64_DTPREL16_HIGHA:
5317 case R_PPC64_DTPREL16_HIGHER:
5318 case R_PPC64_DTPREL16_HIGHERA:
5319 case R_PPC64_DTPREL16_HIGHEST:
5320 case R_PPC64_DTPREL16_HIGHESTA:
5321 break;
5322
5323 /* Nor do these. */
5324 case R_PPC64_REL16:
5325 case R_PPC64_REL16_LO:
5326 case R_PPC64_REL16_HI:
5327 case R_PPC64_REL16_HA:
5328 break;
5329
5330 case R_PPC64_TOC16:
5331 case R_PPC64_TOC16_DS:
5332 htab->do_multi_toc = 1;
5333 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5334 case R_PPC64_TOC16_LO:
5335 case R_PPC64_TOC16_HI:
5336 case R_PPC64_TOC16_HA:
5337 case R_PPC64_TOC16_LO_DS:
5338 sec->has_toc_reloc = 1;
5339 break;
5340
5341 /* This relocation describes the C++ object vtable hierarchy.
5342 Reconstruct it for later use during GC. */
5343 case R_PPC64_GNU_VTINHERIT:
5344 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5345 return FALSE;
5346 break;
5347
5348 /* This relocation describes which C++ vtable entries are actually
5349 used. Record for later use during GC. */
5350 case R_PPC64_GNU_VTENTRY:
5351 BFD_ASSERT (h != NULL);
5352 if (h != NULL
5353 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5354 return FALSE;
5355 break;
5356
5357 case R_PPC64_REL14:
5358 case R_PPC64_REL14_BRTAKEN:
5359 case R_PPC64_REL14_BRNTAKEN:
5360 {
5361 asection *dest = NULL;
5362
5363 /* Heuristic: If jumping outside our section, chances are
5364 we are going to need a stub. */
5365 if (h != NULL)
5366 {
5367 /* If the sym is weak it may be overridden later, so
5368 don't assume we know where a weak sym lives. */
5369 if (h->root.type == bfd_link_hash_defined)
5370 dest = h->root.u.def.section;
5371 }
5372 else
5373 {
5374 Elf_Internal_Sym *isym;
5375
5376 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5377 abfd, r_symndx);
5378 if (isym == NULL)
5379 return FALSE;
5380
5381 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5382 }
5383
5384 if (dest != sec)
5385 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5386 }
5387 /* Fall through. */
5388
5389 case R_PPC64_REL24:
5390 if (h != NULL && ifunc == NULL)
5391 {
5392 /* We may need a .plt entry if the function this reloc
5393 refers to is in a shared lib. */
5394 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5395 return FALSE;
5396 h->needs_plt = 1;
5397 if (h->root.root.string[0] == '.'
5398 && h->root.root.string[1] != '\0')
5399 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5400 if (h == tga || h == dottga)
5401 sec->has_tls_reloc = 1;
5402 }
5403 break;
5404
5405 case R_PPC64_TPREL64:
5406 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5407 if (!info->executable)
5408 info->flags |= DF_STATIC_TLS;
5409 goto dotlstoc;
5410
5411 case R_PPC64_DTPMOD64:
5412 if (rel + 1 < rel_end
5413 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5414 && rel[1].r_offset == rel->r_offset + 8)
5415 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5416 else
5417 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5418 goto dotlstoc;
5419
5420 case R_PPC64_DTPREL64:
5421 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5422 if (rel != relocs
5423 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5424 && rel[-1].r_offset == rel->r_offset - 8)
5425 /* This is the second reloc of a dtpmod, dtprel pair.
5426 Don't mark with TLS_DTPREL. */
5427 goto dodyn;
5428
5429 dotlstoc:
5430 sec->has_tls_reloc = 1;
5431 if (h != NULL)
5432 {
5433 struct ppc_link_hash_entry *eh;
5434 eh = (struct ppc_link_hash_entry *) h;
5435 eh->tls_mask |= tls_type;
5436 }
5437 else
5438 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5439 rel->r_addend, tls_type))
5440 return FALSE;
5441
5442 ppc64_sec = ppc64_elf_section_data (sec);
5443 if (ppc64_sec->sec_type != sec_toc)
5444 {
5445 bfd_size_type amt;
5446
5447 /* One extra to simplify get_tls_mask. */
5448 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5449 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5450 if (ppc64_sec->u.toc.symndx == NULL)
5451 return FALSE;
5452 amt = sec->size * sizeof (bfd_vma) / 8;
5453 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5454 if (ppc64_sec->u.toc.add == NULL)
5455 return FALSE;
5456 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5457 ppc64_sec->sec_type = sec_toc;
5458 }
5459 BFD_ASSERT (rel->r_offset % 8 == 0);
5460 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5461 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5462
5463 /* Mark the second slot of a GD or LD entry.
5464 -1 to indicate GD and -2 to indicate LD. */
5465 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5466 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5467 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5468 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5469 goto dodyn;
5470
5471 case R_PPC64_TPREL16:
5472 case R_PPC64_TPREL16_LO:
5473 case R_PPC64_TPREL16_HI:
5474 case R_PPC64_TPREL16_HA:
5475 case R_PPC64_TPREL16_DS:
5476 case R_PPC64_TPREL16_LO_DS:
5477 case R_PPC64_TPREL16_HIGH:
5478 case R_PPC64_TPREL16_HIGHA:
5479 case R_PPC64_TPREL16_HIGHER:
5480 case R_PPC64_TPREL16_HIGHERA:
5481 case R_PPC64_TPREL16_HIGHEST:
5482 case R_PPC64_TPREL16_HIGHESTA:
5483 if (info->shared)
5484 {
5485 if (!info->executable)
5486 info->flags |= DF_STATIC_TLS;
5487 goto dodyn;
5488 }
5489 break;
5490
5491 case R_PPC64_ADDR64:
5492 if (opd_sym_map != NULL
5493 && rel + 1 < rel_end
5494 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5495 {
5496 if (h != NULL)
5497 {
5498 if (h->root.root.string[0] == '.'
5499 && h->root.root.string[1] != 0
5500 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5501 ;
5502 else
5503 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5504 }
5505 else
5506 {
5507 asection *s;
5508 Elf_Internal_Sym *isym;
5509
5510 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5511 abfd, r_symndx);
5512 if (isym == NULL)
5513 return FALSE;
5514
5515 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5516 if (s != NULL && s != sec)
5517 opd_sym_map[rel->r_offset / 8] = s;
5518 }
5519 }
5520 /* Fall through. */
5521
5522 case R_PPC64_REL30:
5523 case R_PPC64_REL32:
5524 case R_PPC64_REL64:
5525 case R_PPC64_ADDR14:
5526 case R_PPC64_ADDR14_BRNTAKEN:
5527 case R_PPC64_ADDR14_BRTAKEN:
5528 case R_PPC64_ADDR16:
5529 case R_PPC64_ADDR16_DS:
5530 case R_PPC64_ADDR16_HA:
5531 case R_PPC64_ADDR16_HI:
5532 case R_PPC64_ADDR16_HIGH:
5533 case R_PPC64_ADDR16_HIGHA:
5534 case R_PPC64_ADDR16_HIGHER:
5535 case R_PPC64_ADDR16_HIGHERA:
5536 case R_PPC64_ADDR16_HIGHEST:
5537 case R_PPC64_ADDR16_HIGHESTA:
5538 case R_PPC64_ADDR16_LO:
5539 case R_PPC64_ADDR16_LO_DS:
5540 case R_PPC64_ADDR24:
5541 case R_PPC64_ADDR32:
5542 case R_PPC64_UADDR16:
5543 case R_PPC64_UADDR32:
5544 case R_PPC64_UADDR64:
5545 case R_PPC64_TOC:
5546 if (h != NULL && !info->shared)
5547 /* We may need a copy reloc. */
5548 h->non_got_ref = 1;
5549
5550 /* Don't propagate .opd relocs. */
5551 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5552 break;
5553
5554 /* If we are creating a shared library, and this is a reloc
5555 against a global symbol, or a non PC relative reloc
5556 against a local symbol, then we need to copy the reloc
5557 into the shared library. However, if we are linking with
5558 -Bsymbolic, we do not need to copy a reloc against a
5559 global symbol which is defined in an object we are
5560 including in the link (i.e., DEF_REGULAR is set). At
5561 this point we have not seen all the input files, so it is
5562 possible that DEF_REGULAR is not set now but will be set
5563 later (it is never cleared). In case of a weak definition,
5564 DEF_REGULAR may be cleared later by a strong definition in
5565 a shared library. We account for that possibility below by
5566 storing information in the dyn_relocs field of the hash
5567 table entry. A similar situation occurs when creating
5568 shared libraries and symbol visibility changes render the
5569 symbol local.
5570
5571 If on the other hand, we are creating an executable, we
5572 may need to keep relocations for symbols satisfied by a
5573 dynamic library if we manage to avoid copy relocs for the
5574 symbol. */
5575 dodyn:
5576 if ((info->shared
5577 && (must_be_dyn_reloc (info, r_type)
5578 || (h != NULL
5579 && (!SYMBOLIC_BIND (info, h)
5580 || h->root.type == bfd_link_hash_defweak
5581 || !h->def_regular))))
5582 || (ELIMINATE_COPY_RELOCS
5583 && !info->shared
5584 && h != NULL
5585 && (h->root.type == bfd_link_hash_defweak
5586 || !h->def_regular))
5587 || (!info->shared
5588 && ifunc != NULL))
5589 {
5590 /* We must copy these reloc types into the output file.
5591 Create a reloc section in dynobj and make room for
5592 this reloc. */
5593 if (sreloc == NULL)
5594 {
5595 sreloc = _bfd_elf_make_dynamic_reloc_section
5596 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5597
5598 if (sreloc == NULL)
5599 return FALSE;
5600 }
5601
5602 /* If this is a global symbol, we count the number of
5603 relocations we need for this symbol. */
5604 if (h != NULL)
5605 {
5606 struct elf_dyn_relocs *p;
5607 struct elf_dyn_relocs **head;
5608
5609 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5610 p = *head;
5611 if (p == NULL || p->sec != sec)
5612 {
5613 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5614 if (p == NULL)
5615 return FALSE;
5616 p->next = *head;
5617 *head = p;
5618 p->sec = sec;
5619 p->count = 0;
5620 p->pc_count = 0;
5621 }
5622 p->count += 1;
5623 if (!must_be_dyn_reloc (info, r_type))
5624 p->pc_count += 1;
5625 }
5626 else
5627 {
5628 /* Track dynamic relocs needed for local syms too.
5629 We really need local syms available to do this
5630 easily. Oh well. */
5631 struct ppc_dyn_relocs *p;
5632 struct ppc_dyn_relocs **head;
5633 bfd_boolean is_ifunc;
5634 asection *s;
5635 void *vpp;
5636 Elf_Internal_Sym *isym;
5637
5638 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5639 abfd, r_symndx);
5640 if (isym == NULL)
5641 return FALSE;
5642
5643 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5644 if (s == NULL)
5645 s = sec;
5646
5647 vpp = &elf_section_data (s)->local_dynrel;
5648 head = (struct ppc_dyn_relocs **) vpp;
5649 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
5650 p = *head;
5651 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
5652 p = p->next;
5653 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
5654 {
5655 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5656 if (p == NULL)
5657 return FALSE;
5658 p->next = *head;
5659 *head = p;
5660 p->sec = sec;
5661 p->ifunc = is_ifunc;
5662 p->count = 0;
5663 }
5664 p->count += 1;
5665 }
5666 }
5667 break;
5668
5669 default:
5670 break;
5671 }
5672 }
5673
5674 return TRUE;
5675 }
5676
5677 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5678 of the code entry point, and its section. */
5679
5680 static bfd_vma
5681 opd_entry_value (asection *opd_sec,
5682 bfd_vma offset,
5683 asection **code_sec,
5684 bfd_vma *code_off,
5685 bfd_boolean in_code_sec)
5686 {
5687 bfd *opd_bfd = opd_sec->owner;
5688 Elf_Internal_Rela *relocs;
5689 Elf_Internal_Rela *lo, *hi, *look;
5690 bfd_vma val;
5691
5692 /* No relocs implies we are linking a --just-symbols object, or looking
5693 at a final linked executable with addr2line or somesuch. */
5694 if (opd_sec->reloc_count == 0)
5695 {
5696 bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents;
5697
5698 if (contents == NULL)
5699 {
5700 if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents))
5701 return (bfd_vma) -1;
5702 ppc64_elf_tdata (opd_bfd)->opd.contents = contents;
5703 }
5704
5705 val = bfd_get_64 (opd_bfd, contents + offset);
5706 if (code_sec != NULL)
5707 {
5708 asection *sec, *likely = NULL;
5709
5710 if (in_code_sec)
5711 {
5712 sec = *code_sec;
5713 if (sec->vma <= val
5714 && val < sec->vma + sec->size)
5715 likely = sec;
5716 else
5717 val = -1;
5718 }
5719 else
5720 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5721 if (sec->vma <= val
5722 && (sec->flags & SEC_LOAD) != 0
5723 && (sec->flags & SEC_ALLOC) != 0)
5724 likely = sec;
5725 if (likely != NULL)
5726 {
5727 *code_sec = likely;
5728 if (code_off != NULL)
5729 *code_off = val - likely->vma;
5730 }
5731 }
5732 return val;
5733 }
5734
5735 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5736
5737 relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs;
5738 if (relocs == NULL)
5739 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5740
5741 /* Go find the opd reloc at the sym address. */
5742 lo = relocs;
5743 BFD_ASSERT (lo != NULL);
5744 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5745 val = (bfd_vma) -1;
5746 while (lo < hi)
5747 {
5748 look = lo + (hi - lo) / 2;
5749 if (look->r_offset < offset)
5750 lo = look + 1;
5751 else if (look->r_offset > offset)
5752 hi = look;
5753 else
5754 {
5755 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5756
5757 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5758 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5759 {
5760 unsigned long symndx = ELF64_R_SYM (look->r_info);
5761 asection *sec;
5762
5763 if (symndx < symtab_hdr->sh_info
5764 || elf_sym_hashes (opd_bfd) == NULL)
5765 {
5766 Elf_Internal_Sym *sym;
5767
5768 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5769 if (sym == NULL)
5770 {
5771 size_t symcnt = symtab_hdr->sh_info;
5772 if (elf_sym_hashes (opd_bfd) == NULL)
5773 symcnt = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
5774 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, symcnt,
5775 0, NULL, NULL, NULL);
5776 if (sym == NULL)
5777 break;
5778 symtab_hdr->contents = (bfd_byte *) sym;
5779 }
5780
5781 sym += symndx;
5782 val = sym->st_value;
5783 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5784 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5785 }
5786 else
5787 {
5788 struct elf_link_hash_entry **sym_hashes;
5789 struct elf_link_hash_entry *rh;
5790
5791 sym_hashes = elf_sym_hashes (opd_bfd);
5792 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5793 if (rh != NULL)
5794 {
5795 rh = elf_follow_link (rh);
5796 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5797 || rh->root.type == bfd_link_hash_defweak);
5798 val = rh->root.u.def.value;
5799 sec = rh->root.u.def.section;
5800 }
5801 else
5802 {
5803 /* Handle the odd case where we can be called
5804 during bfd_elf_link_add_symbols before the
5805 symbol hashes have been fully populated. */
5806 Elf_Internal_Sym *sym;
5807
5808 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, 1,
5809 symndx, NULL, NULL, NULL);
5810 if (sym == NULL)
5811 break;
5812
5813 val = sym->st_value;
5814 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5815 free (sym);
5816 }
5817 }
5818 val += look->r_addend;
5819 if (code_off != NULL)
5820 *code_off = val;
5821 if (code_sec != NULL)
5822 {
5823 if (in_code_sec && *code_sec != sec)
5824 return -1;
5825 else
5826 *code_sec = sec;
5827 }
5828 if (sec != NULL && sec->output_section != NULL)
5829 val += sec->output_section->vma + sec->output_offset;
5830 }
5831 break;
5832 }
5833 }
5834
5835 return val;
5836 }
5837
5838 /* If the ELF symbol SYM might be a function in SEC, return the
5839 function size and set *CODE_OFF to the function's entry point,
5840 otherwise return zero. */
5841
5842 static bfd_size_type
5843 ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec,
5844 bfd_vma *code_off)
5845 {
5846 bfd_size_type size;
5847
5848 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
5849 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0)
5850 return 0;
5851
5852 size = 0;
5853 if (!(sym->flags & BSF_SYNTHETIC))
5854 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
5855
5856 if (strcmp (sym->section->name, ".opd") == 0)
5857 {
5858 if (opd_entry_value (sym->section, sym->value,
5859 &sec, code_off, TRUE) == (bfd_vma) -1)
5860 return 0;
5861 /* An old ABI binary with dot-syms has a size of 24 on the .opd
5862 symbol. This size has nothing to do with the code size of the
5863 function, which is what we're supposed to return, but the
5864 code size isn't available without looking up the dot-sym.
5865 However, doing that would be a waste of time particularly
5866 since elf_find_function will look at the dot-sym anyway.
5867 Now, elf_find_function will keep the largest size of any
5868 function sym found at the code address of interest, so return
5869 1 here to avoid it incorrectly caching a larger function size
5870 for a small function. This does mean we return the wrong
5871 size for a new-ABI function of size 24, but all that does is
5872 disable caching for such functions. */
5873 if (size == 24)
5874 size = 1;
5875 }
5876 else
5877 {
5878 if (sym->section != sec)
5879 return 0;
5880 *code_off = sym->value;
5881 }
5882 if (size == 0)
5883 size = 1;
5884 return size;
5885 }
5886
5887 /* Return true if symbol is defined in a regular object file. */
5888
5889 static bfd_boolean
5890 is_static_defined (struct elf_link_hash_entry *h)
5891 {
5892 return ((h->root.type == bfd_link_hash_defined
5893 || h->root.type == bfd_link_hash_defweak)
5894 && h->root.u.def.section != NULL
5895 && h->root.u.def.section->output_section != NULL);
5896 }
5897
5898 /* If FDH is a function descriptor symbol, return the associated code
5899 entry symbol if it is defined. Return NULL otherwise. */
5900
5901 static struct ppc_link_hash_entry *
5902 defined_code_entry (struct ppc_link_hash_entry *fdh)
5903 {
5904 if (fdh->is_func_descriptor)
5905 {
5906 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5907 if (fh->elf.root.type == bfd_link_hash_defined
5908 || fh->elf.root.type == bfd_link_hash_defweak)
5909 return fh;
5910 }
5911 return NULL;
5912 }
5913
5914 /* If FH is a function code entry symbol, return the associated
5915 function descriptor symbol if it is defined. Return NULL otherwise. */
5916
5917 static struct ppc_link_hash_entry *
5918 defined_func_desc (struct ppc_link_hash_entry *fh)
5919 {
5920 if (fh->oh != NULL
5921 && fh->oh->is_func_descriptor)
5922 {
5923 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5924 if (fdh->elf.root.type == bfd_link_hash_defined
5925 || fdh->elf.root.type == bfd_link_hash_defweak)
5926 return fdh;
5927 }
5928 return NULL;
5929 }
5930
5931 /* Mark all our entry sym sections, both opd and code section. */
5932
5933 static void
5934 ppc64_elf_gc_keep (struct bfd_link_info *info)
5935 {
5936 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5937 struct bfd_sym_chain *sym;
5938
5939 if (htab == NULL)
5940 return;
5941
5942 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5943 {
5944 struct ppc_link_hash_entry *eh, *fh;
5945 asection *sec;
5946
5947 eh = (struct ppc_link_hash_entry *)
5948 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5949 if (eh == NULL)
5950 continue;
5951 if (eh->elf.root.type != bfd_link_hash_defined
5952 && eh->elf.root.type != bfd_link_hash_defweak)
5953 continue;
5954
5955 fh = defined_code_entry (eh);
5956 if (fh != NULL)
5957 {
5958 sec = fh->elf.root.u.def.section;
5959 sec->flags |= SEC_KEEP;
5960 }
5961 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5962 && opd_entry_value (eh->elf.root.u.def.section,
5963 eh->elf.root.u.def.value,
5964 &sec, NULL, FALSE) != (bfd_vma) -1)
5965 sec->flags |= SEC_KEEP;
5966
5967 sec = eh->elf.root.u.def.section;
5968 sec->flags |= SEC_KEEP;
5969 }
5970 }
5971
5972 /* Mark sections containing dynamically referenced symbols. When
5973 building shared libraries, we must assume that any visible symbol is
5974 referenced. */
5975
5976 static bfd_boolean
5977 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5978 {
5979 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5980 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5981 struct ppc_link_hash_entry *fdh;
5982
5983 /* Dynamic linking info is on the func descriptor sym. */
5984 fdh = defined_func_desc (eh);
5985 if (fdh != NULL)
5986 eh = fdh;
5987
5988 if ((eh->elf.root.type == bfd_link_hash_defined
5989 || eh->elf.root.type == bfd_link_hash_defweak)
5990 && (eh->elf.ref_dynamic
5991 || (!info->executable
5992 && eh->elf.def_regular
5993 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5994 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN
5995 && (strchr (eh->elf.root.root.string, ELF_VER_CHR) != NULL
5996 || !bfd_hide_sym_by_version (info->version_info,
5997 eh->elf.root.root.string)))))
5998 {
5999 asection *code_sec;
6000 struct ppc_link_hash_entry *fh;
6001
6002 eh->elf.root.u.def.section->flags |= SEC_KEEP;
6003
6004 /* Function descriptor syms cause the associated
6005 function code sym section to be marked. */
6006 fh = defined_code_entry (eh);
6007 if (fh != NULL)
6008 {
6009 code_sec = fh->elf.root.u.def.section;
6010 code_sec->flags |= SEC_KEEP;
6011 }
6012 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6013 && opd_entry_value (eh->elf.root.u.def.section,
6014 eh->elf.root.u.def.value,
6015 &code_sec, NULL, FALSE) != (bfd_vma) -1)
6016 code_sec->flags |= SEC_KEEP;
6017 }
6018
6019 return TRUE;
6020 }
6021
6022 /* Return the section that should be marked against GC for a given
6023 relocation. */
6024
6025 static asection *
6026 ppc64_elf_gc_mark_hook (asection *sec,
6027 struct bfd_link_info *info,
6028 Elf_Internal_Rela *rel,
6029 struct elf_link_hash_entry *h,
6030 Elf_Internal_Sym *sym)
6031 {
6032 asection *rsec;
6033
6034 /* Syms return NULL if we're marking .opd, so we avoid marking all
6035 function sections, as all functions are referenced in .opd. */
6036 rsec = NULL;
6037 if (get_opd_info (sec) != NULL)
6038 return rsec;
6039
6040 if (h != NULL)
6041 {
6042 enum elf_ppc64_reloc_type r_type;
6043 struct ppc_link_hash_entry *eh, *fh, *fdh;
6044
6045 r_type = ELF64_R_TYPE (rel->r_info);
6046 switch (r_type)
6047 {
6048 case R_PPC64_GNU_VTINHERIT:
6049 case R_PPC64_GNU_VTENTRY:
6050 break;
6051
6052 default:
6053 switch (h->root.type)
6054 {
6055 case bfd_link_hash_defined:
6056 case bfd_link_hash_defweak:
6057 eh = (struct ppc_link_hash_entry *) h;
6058 fdh = defined_func_desc (eh);
6059 if (fdh != NULL)
6060 eh = fdh;
6061
6062 /* Function descriptor syms cause the associated
6063 function code sym section to be marked. */
6064 fh = defined_code_entry (eh);
6065 if (fh != NULL)
6066 {
6067 /* They also mark their opd section. */
6068 eh->elf.root.u.def.section->gc_mark = 1;
6069
6070 rsec = fh->elf.root.u.def.section;
6071 }
6072 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
6073 && opd_entry_value (eh->elf.root.u.def.section,
6074 eh->elf.root.u.def.value,
6075 &rsec, NULL, FALSE) != (bfd_vma) -1)
6076 eh->elf.root.u.def.section->gc_mark = 1;
6077 else
6078 rsec = h->root.u.def.section;
6079 break;
6080
6081 case bfd_link_hash_common:
6082 rsec = h->root.u.c.p->section;
6083 break;
6084
6085 default:
6086 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
6087 }
6088 }
6089 }
6090 else
6091 {
6092 struct _opd_sec_data *opd;
6093
6094 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
6095 opd = get_opd_info (rsec);
6096 if (opd != NULL && opd->func_sec != NULL)
6097 {
6098 rsec->gc_mark = 1;
6099
6100 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
6101 }
6102 }
6103
6104 return rsec;
6105 }
6106
6107 /* Update the .got, .plt. and dynamic reloc reference counts for the
6108 section being removed. */
6109
6110 static bfd_boolean
6111 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
6112 asection *sec, const Elf_Internal_Rela *relocs)
6113 {
6114 struct ppc_link_hash_table *htab;
6115 Elf_Internal_Shdr *symtab_hdr;
6116 struct elf_link_hash_entry **sym_hashes;
6117 struct got_entry **local_got_ents;
6118 const Elf_Internal_Rela *rel, *relend;
6119
6120 if (info->relocatable)
6121 return TRUE;
6122
6123 if ((sec->flags & SEC_ALLOC) == 0)
6124 return TRUE;
6125
6126 elf_section_data (sec)->local_dynrel = NULL;
6127
6128 htab = ppc_hash_table (info);
6129 if (htab == NULL)
6130 return FALSE;
6131
6132 symtab_hdr = &elf_symtab_hdr (abfd);
6133 sym_hashes = elf_sym_hashes (abfd);
6134 local_got_ents = elf_local_got_ents (abfd);
6135
6136 relend = relocs + sec->reloc_count;
6137 for (rel = relocs; rel < relend; rel++)
6138 {
6139 unsigned long r_symndx;
6140 enum elf_ppc64_reloc_type r_type;
6141 struct elf_link_hash_entry *h = NULL;
6142 unsigned char tls_type = 0;
6143
6144 r_symndx = ELF64_R_SYM (rel->r_info);
6145 r_type = ELF64_R_TYPE (rel->r_info);
6146 if (r_symndx >= symtab_hdr->sh_info)
6147 {
6148 struct ppc_link_hash_entry *eh;
6149 struct elf_dyn_relocs **pp;
6150 struct elf_dyn_relocs *p;
6151
6152 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6153 h = elf_follow_link (h);
6154 eh = (struct ppc_link_hash_entry *) h;
6155
6156 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6157 if (p->sec == sec)
6158 {
6159 /* Everything must go for SEC. */
6160 *pp = p->next;
6161 break;
6162 }
6163 }
6164
6165 if (is_branch_reloc (r_type))
6166 {
6167 struct plt_entry **ifunc = NULL;
6168 if (h != NULL)
6169 {
6170 if (h->type == STT_GNU_IFUNC)
6171 ifunc = &h->plt.plist;
6172 }
6173 else if (local_got_ents != NULL)
6174 {
6175 struct plt_entry **local_plt = (struct plt_entry **)
6176 (local_got_ents + symtab_hdr->sh_info);
6177 unsigned char *local_got_tls_masks = (unsigned char *)
6178 (local_plt + symtab_hdr->sh_info);
6179 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
6180 ifunc = local_plt + r_symndx;
6181 }
6182 if (ifunc != NULL)
6183 {
6184 struct plt_entry *ent;
6185
6186 for (ent = *ifunc; ent != NULL; ent = ent->next)
6187 if (ent->addend == rel->r_addend)
6188 break;
6189 if (ent == NULL)
6190 abort ();
6191 if (ent->plt.refcount > 0)
6192 ent->plt.refcount -= 1;
6193 continue;
6194 }
6195 }
6196
6197 switch (r_type)
6198 {
6199 case R_PPC64_GOT_TLSLD16:
6200 case R_PPC64_GOT_TLSLD16_LO:
6201 case R_PPC64_GOT_TLSLD16_HI:
6202 case R_PPC64_GOT_TLSLD16_HA:
6203 tls_type = TLS_TLS | TLS_LD;
6204 goto dogot;
6205
6206 case R_PPC64_GOT_TLSGD16:
6207 case R_PPC64_GOT_TLSGD16_LO:
6208 case R_PPC64_GOT_TLSGD16_HI:
6209 case R_PPC64_GOT_TLSGD16_HA:
6210 tls_type = TLS_TLS | TLS_GD;
6211 goto dogot;
6212
6213 case R_PPC64_GOT_TPREL16_DS:
6214 case R_PPC64_GOT_TPREL16_LO_DS:
6215 case R_PPC64_GOT_TPREL16_HI:
6216 case R_PPC64_GOT_TPREL16_HA:
6217 tls_type = TLS_TLS | TLS_TPREL;
6218 goto dogot;
6219
6220 case R_PPC64_GOT_DTPREL16_DS:
6221 case R_PPC64_GOT_DTPREL16_LO_DS:
6222 case R_PPC64_GOT_DTPREL16_HI:
6223 case R_PPC64_GOT_DTPREL16_HA:
6224 tls_type = TLS_TLS | TLS_DTPREL;
6225 goto dogot;
6226
6227 case R_PPC64_GOT16:
6228 case R_PPC64_GOT16_DS:
6229 case R_PPC64_GOT16_HA:
6230 case R_PPC64_GOT16_HI:
6231 case R_PPC64_GOT16_LO:
6232 case R_PPC64_GOT16_LO_DS:
6233 dogot:
6234 {
6235 struct got_entry *ent;
6236
6237 if (h != NULL)
6238 ent = h->got.glist;
6239 else
6240 ent = local_got_ents[r_symndx];
6241
6242 for (; ent != NULL; ent = ent->next)
6243 if (ent->addend == rel->r_addend
6244 && ent->owner == abfd
6245 && ent->tls_type == tls_type)
6246 break;
6247 if (ent == NULL)
6248 abort ();
6249 if (ent->got.refcount > 0)
6250 ent->got.refcount -= 1;
6251 }
6252 break;
6253
6254 case R_PPC64_PLT16_HA:
6255 case R_PPC64_PLT16_HI:
6256 case R_PPC64_PLT16_LO:
6257 case R_PPC64_PLT32:
6258 case R_PPC64_PLT64:
6259 case R_PPC64_REL14:
6260 case R_PPC64_REL14_BRNTAKEN:
6261 case R_PPC64_REL14_BRTAKEN:
6262 case R_PPC64_REL24:
6263 if (h != NULL)
6264 {
6265 struct plt_entry *ent;
6266
6267 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6268 if (ent->addend == rel->r_addend)
6269 break;
6270 if (ent != NULL && ent->plt.refcount > 0)
6271 ent->plt.refcount -= 1;
6272 }
6273 break;
6274
6275 default:
6276 break;
6277 }
6278 }
6279 return TRUE;
6280 }
6281
6282 /* The maximum size of .sfpr. */
6283 #define SFPR_MAX (218*4)
6284
6285 struct sfpr_def_parms
6286 {
6287 const char name[12];
6288 unsigned char lo, hi;
6289 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
6290 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
6291 };
6292
6293 /* Auto-generate _save*, _rest* functions in .sfpr. */
6294
6295 static bfd_boolean
6296 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
6297 {
6298 struct ppc_link_hash_table *htab = ppc_hash_table (info);
6299 unsigned int i;
6300 size_t len = strlen (parm->name);
6301 bfd_boolean writing = FALSE;
6302 char sym[16];
6303
6304 if (htab == NULL)
6305 return FALSE;
6306
6307 memcpy (sym, parm->name, len);
6308 sym[len + 2] = 0;
6309
6310 for (i = parm->lo; i <= parm->hi; i++)
6311 {
6312 struct elf_link_hash_entry *h;
6313
6314 sym[len + 0] = i / 10 + '0';
6315 sym[len + 1] = i % 10 + '0';
6316 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
6317 if (h != NULL
6318 && !h->def_regular)
6319 {
6320 h->root.type = bfd_link_hash_defined;
6321 h->root.u.def.section = htab->sfpr;
6322 h->root.u.def.value = htab->sfpr->size;
6323 h->type = STT_FUNC;
6324 h->def_regular = 1;
6325 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6326 writing = TRUE;
6327 if (htab->sfpr->contents == NULL)
6328 {
6329 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6330 if (htab->sfpr->contents == NULL)
6331 return FALSE;
6332 }
6333 }
6334 if (writing)
6335 {
6336 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6337 if (i != parm->hi)
6338 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6339 else
6340 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6341 htab->sfpr->size = p - htab->sfpr->contents;
6342 }
6343 }
6344
6345 return TRUE;
6346 }
6347
6348 static bfd_byte *
6349 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6350 {
6351 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6352 return p + 4;
6353 }
6354
6355 static bfd_byte *
6356 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6357 {
6358 p = savegpr0 (abfd, p, r);
6359 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6360 p = p + 4;
6361 bfd_put_32 (abfd, BLR, p);
6362 return p + 4;
6363 }
6364
6365 static bfd_byte *
6366 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6367 {
6368 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6369 return p + 4;
6370 }
6371
6372 static bfd_byte *
6373 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6374 {
6375 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6376 p = p + 4;
6377 p = restgpr0 (abfd, p, r);
6378 bfd_put_32 (abfd, MTLR_R0, p);
6379 p = p + 4;
6380 if (r == 29)
6381 {
6382 p = restgpr0 (abfd, p, 30);
6383 p = restgpr0 (abfd, p, 31);
6384 }
6385 bfd_put_32 (abfd, BLR, p);
6386 return p + 4;
6387 }
6388
6389 static bfd_byte *
6390 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6391 {
6392 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6393 return p + 4;
6394 }
6395
6396 static bfd_byte *
6397 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6398 {
6399 p = savegpr1 (abfd, p, r);
6400 bfd_put_32 (abfd, BLR, p);
6401 return p + 4;
6402 }
6403
6404 static bfd_byte *
6405 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6406 {
6407 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6408 return p + 4;
6409 }
6410
6411 static bfd_byte *
6412 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6413 {
6414 p = restgpr1 (abfd, p, r);
6415 bfd_put_32 (abfd, BLR, p);
6416 return p + 4;
6417 }
6418
6419 static bfd_byte *
6420 savefpr (bfd *abfd, bfd_byte *p, int r)
6421 {
6422 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6423 return p + 4;
6424 }
6425
6426 static bfd_byte *
6427 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6428 {
6429 p = savefpr (abfd, p, r);
6430 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6431 p = p + 4;
6432 bfd_put_32 (abfd, BLR, p);
6433 return p + 4;
6434 }
6435
6436 static bfd_byte *
6437 restfpr (bfd *abfd, bfd_byte *p, int r)
6438 {
6439 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6440 return p + 4;
6441 }
6442
6443 static bfd_byte *
6444 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6445 {
6446 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6447 p = p + 4;
6448 p = restfpr (abfd, p, r);
6449 bfd_put_32 (abfd, MTLR_R0, p);
6450 p = p + 4;
6451 if (r == 29)
6452 {
6453 p = restfpr (abfd, p, 30);
6454 p = restfpr (abfd, p, 31);
6455 }
6456 bfd_put_32 (abfd, BLR, p);
6457 return p + 4;
6458 }
6459
6460 static bfd_byte *
6461 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6462 {
6463 p = savefpr (abfd, p, r);
6464 bfd_put_32 (abfd, BLR, p);
6465 return p + 4;
6466 }
6467
6468 static bfd_byte *
6469 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6470 {
6471 p = restfpr (abfd, p, r);
6472 bfd_put_32 (abfd, BLR, p);
6473 return p + 4;
6474 }
6475
6476 static bfd_byte *
6477 savevr (bfd *abfd, bfd_byte *p, int r)
6478 {
6479 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6480 p = p + 4;
6481 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6482 return p + 4;
6483 }
6484
6485 static bfd_byte *
6486 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6487 {
6488 p = savevr (abfd, p, r);
6489 bfd_put_32 (abfd, BLR, p);
6490 return p + 4;
6491 }
6492
6493 static bfd_byte *
6494 restvr (bfd *abfd, bfd_byte *p, int r)
6495 {
6496 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6497 p = p + 4;
6498 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6499 return p + 4;
6500 }
6501
6502 static bfd_byte *
6503 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6504 {
6505 p = restvr (abfd, p, r);
6506 bfd_put_32 (abfd, BLR, p);
6507 return p + 4;
6508 }
6509
6510 /* Called via elf_link_hash_traverse to transfer dynamic linking
6511 information on function code symbol entries to their corresponding
6512 function descriptor symbol entries. */
6513
6514 static bfd_boolean
6515 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6516 {
6517 struct bfd_link_info *info;
6518 struct ppc_link_hash_table *htab;
6519 struct plt_entry *ent;
6520 struct ppc_link_hash_entry *fh;
6521 struct ppc_link_hash_entry *fdh;
6522 bfd_boolean force_local;
6523
6524 fh = (struct ppc_link_hash_entry *) h;
6525 if (fh->elf.root.type == bfd_link_hash_indirect)
6526 return TRUE;
6527
6528 info = inf;
6529 htab = ppc_hash_table (info);
6530 if (htab == NULL)
6531 return FALSE;
6532
6533 /* Resolve undefined references to dot-symbols as the value
6534 in the function descriptor, if we have one in a regular object.
6535 This is to satisfy cases like ".quad .foo". Calls to functions
6536 in dynamic objects are handled elsewhere. */
6537 if (fh->elf.root.type == bfd_link_hash_undefweak
6538 && fh->was_undefined
6539 && (fdh = defined_func_desc (fh)) != NULL
6540 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6541 && opd_entry_value (fdh->elf.root.u.def.section,
6542 fdh->elf.root.u.def.value,
6543 &fh->elf.root.u.def.section,
6544 &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1)
6545 {
6546 fh->elf.root.type = fdh->elf.root.type;
6547 fh->elf.forced_local = 1;
6548 fh->elf.def_regular = fdh->elf.def_regular;
6549 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6550 }
6551
6552 /* If this is a function code symbol, transfer dynamic linking
6553 information to the function descriptor symbol. */
6554 if (!fh->is_func)
6555 return TRUE;
6556
6557 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6558 if (ent->plt.refcount > 0)
6559 break;
6560 if (ent == NULL
6561 || fh->elf.root.root.string[0] != '.'
6562 || fh->elf.root.root.string[1] == '\0')
6563 return TRUE;
6564
6565 /* Find the corresponding function descriptor symbol. Create it
6566 as undefined if necessary. */
6567
6568 fdh = lookup_fdh (fh, htab);
6569 if (fdh == NULL
6570 && !info->executable
6571 && (fh->elf.root.type == bfd_link_hash_undefined
6572 || fh->elf.root.type == bfd_link_hash_undefweak))
6573 {
6574 fdh = make_fdh (info, fh);
6575 if (fdh == NULL)
6576 return FALSE;
6577 }
6578
6579 /* Fake function descriptors are made undefweak. If the function
6580 code symbol is strong undefined, make the fake sym the same.
6581 If the function code symbol is defined, then force the fake
6582 descriptor local; We can't support overriding of symbols in a
6583 shared library on a fake descriptor. */
6584
6585 if (fdh != NULL
6586 && fdh->fake
6587 && fdh->elf.root.type == bfd_link_hash_undefweak)
6588 {
6589 if (fh->elf.root.type == bfd_link_hash_undefined)
6590 {
6591 fdh->elf.root.type = bfd_link_hash_undefined;
6592 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6593 }
6594 else if (fh->elf.root.type == bfd_link_hash_defined
6595 || fh->elf.root.type == bfd_link_hash_defweak)
6596 {
6597 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6598 }
6599 }
6600
6601 if (fdh != NULL
6602 && !fdh->elf.forced_local
6603 && (!info->executable
6604 || fdh->elf.def_dynamic
6605 || fdh->elf.ref_dynamic
6606 || (fdh->elf.root.type == bfd_link_hash_undefweak
6607 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6608 {
6609 if (fdh->elf.dynindx == -1)
6610 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6611 return FALSE;
6612 fdh->elf.ref_regular |= fh->elf.ref_regular;
6613 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6614 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6615 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6616 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6617 {
6618 move_plt_plist (fh, fdh);
6619 fdh->elf.needs_plt = 1;
6620 }
6621 fdh->is_func_descriptor = 1;
6622 fdh->oh = fh;
6623 fh->oh = fdh;
6624 }
6625
6626 /* Now that the info is on the function descriptor, clear the
6627 function code sym info. Any function code syms for which we
6628 don't have a definition in a regular file, we force local.
6629 This prevents a shared library from exporting syms that have
6630 been imported from another library. Function code syms that
6631 are really in the library we must leave global to prevent the
6632 linker dragging in a definition from a static library. */
6633 force_local = (!fh->elf.def_regular
6634 || fdh == NULL
6635 || !fdh->elf.def_regular
6636 || fdh->elf.forced_local);
6637 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6638
6639 return TRUE;
6640 }
6641
6642 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6643 this hook to a) provide some gcc support functions, and b) transfer
6644 dynamic linking information gathered so far on function code symbol
6645 entries, to their corresponding function descriptor symbol entries. */
6646
6647 static bfd_boolean
6648 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6649 struct bfd_link_info *info)
6650 {
6651 struct ppc_link_hash_table *htab;
6652 unsigned int i;
6653 static const struct sfpr_def_parms funcs[] =
6654 {
6655 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6656 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6657 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6658 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6659 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6660 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6661 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6662 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6663 { "._savef", 14, 31, savefpr, savefpr1_tail },
6664 { "._restf", 14, 31, restfpr, restfpr1_tail },
6665 { "_savevr_", 20, 31, savevr, savevr_tail },
6666 { "_restvr_", 20, 31, restvr, restvr_tail }
6667 };
6668
6669 htab = ppc_hash_table (info);
6670 if (htab == NULL)
6671 return FALSE;
6672
6673 if (!info->relocatable
6674 && htab->elf.hgot != NULL)
6675 _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE);
6676
6677 if (htab->sfpr == NULL)
6678 /* We don't have any relocs. */
6679 return TRUE;
6680
6681 /* Provide any missing _save* and _rest* functions. */
6682 htab->sfpr->size = 0;
6683 if (!info->relocatable)
6684 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6685 if (!sfpr_define (info, &funcs[i]))
6686 return FALSE;
6687
6688 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6689
6690 if (htab->sfpr->size == 0)
6691 htab->sfpr->flags |= SEC_EXCLUDE;
6692
6693 return TRUE;
6694 }
6695
6696 /* Adjust a symbol defined by a dynamic object and referenced by a
6697 regular object. The current definition is in some section of the
6698 dynamic object, but we're not including those sections. We have to
6699 change the definition to something the rest of the link can
6700 understand. */
6701
6702 static bfd_boolean
6703 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6704 struct elf_link_hash_entry *h)
6705 {
6706 struct ppc_link_hash_table *htab;
6707 asection *s;
6708
6709 htab = ppc_hash_table (info);
6710 if (htab == NULL)
6711 return FALSE;
6712
6713 /* Deal with function syms. */
6714 if (h->type == STT_FUNC
6715 || h->type == STT_GNU_IFUNC
6716 || h->needs_plt)
6717 {
6718 /* Clear procedure linkage table information for any symbol that
6719 won't need a .plt entry. */
6720 struct plt_entry *ent;
6721 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6722 if (ent->plt.refcount > 0)
6723 break;
6724 if (ent == NULL
6725 || (h->type != STT_GNU_IFUNC
6726 && (SYMBOL_CALLS_LOCAL (info, h)
6727 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6728 && h->root.type == bfd_link_hash_undefweak))))
6729 {
6730 h->plt.plist = NULL;
6731 h->needs_plt = 0;
6732 }
6733 }
6734 else
6735 h->plt.plist = NULL;
6736
6737 /* If this is a weak symbol, and there is a real definition, the
6738 processor independent code will have arranged for us to see the
6739 real definition first, and we can just use the same value. */
6740 if (h->u.weakdef != NULL)
6741 {
6742 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6743 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6744 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6745 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6746 if (ELIMINATE_COPY_RELOCS)
6747 h->non_got_ref = h->u.weakdef->non_got_ref;
6748 return TRUE;
6749 }
6750
6751 /* If we are creating a shared library, we must presume that the
6752 only references to the symbol are via the global offset table.
6753 For such cases we need not do anything here; the relocations will
6754 be handled correctly by relocate_section. */
6755 if (info->shared)
6756 return TRUE;
6757
6758 /* If there are no references to this symbol that do not use the
6759 GOT, we don't need to generate a copy reloc. */
6760 if (!h->non_got_ref)
6761 return TRUE;
6762
6763 /* Don't generate a copy reloc for symbols defined in the executable. */
6764 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6765 return TRUE;
6766
6767 if (ELIMINATE_COPY_RELOCS)
6768 {
6769 struct ppc_link_hash_entry * eh;
6770 struct elf_dyn_relocs *p;
6771
6772 eh = (struct ppc_link_hash_entry *) h;
6773 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6774 {
6775 s = p->sec->output_section;
6776 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6777 break;
6778 }
6779
6780 /* If we didn't find any dynamic relocs in read-only sections, then
6781 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6782 if (p == NULL)
6783 {
6784 h->non_got_ref = 0;
6785 return TRUE;
6786 }
6787 }
6788
6789 if (h->plt.plist != NULL)
6790 {
6791 /* We should never get here, but unfortunately there are versions
6792 of gcc out there that improperly (for this ABI) put initialized
6793 function pointers, vtable refs and suchlike in read-only
6794 sections. Allow them to proceed, but warn that this might
6795 break at runtime. */
6796 info->callbacks->einfo
6797 (_("%P: copy reloc against `%T' requires lazy plt linking; "
6798 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6799 h->root.root.string);
6800 }
6801
6802 /* This is a reference to a symbol defined by a dynamic object which
6803 is not a function. */
6804
6805 /* We must allocate the symbol in our .dynbss section, which will
6806 become part of the .bss section of the executable. There will be
6807 an entry for this symbol in the .dynsym section. The dynamic
6808 object will contain position independent code, so all references
6809 from the dynamic object to this symbol will go through the global
6810 offset table. The dynamic linker will use the .dynsym entry to
6811 determine the address it must put in the global offset table, so
6812 both the dynamic object and the regular object will refer to the
6813 same memory location for the variable. */
6814
6815 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6816 to copy the initial value out of the dynamic object and into the
6817 runtime process image. We need to remember the offset into the
6818 .rela.bss section we are going to use. */
6819 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6820 {
6821 htab->relbss->size += sizeof (Elf64_External_Rela);
6822 h->needs_copy = 1;
6823 }
6824
6825 s = htab->dynbss;
6826
6827 return _bfd_elf_adjust_dynamic_copy (h, s);
6828 }
6829
6830 /* If given a function descriptor symbol, hide both the function code
6831 sym and the descriptor. */
6832 static void
6833 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6834 struct elf_link_hash_entry *h,
6835 bfd_boolean force_local)
6836 {
6837 struct ppc_link_hash_entry *eh;
6838 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6839
6840 eh = (struct ppc_link_hash_entry *) h;
6841 if (eh->is_func_descriptor)
6842 {
6843 struct ppc_link_hash_entry *fh = eh->oh;
6844
6845 if (fh == NULL)
6846 {
6847 const char *p, *q;
6848 struct ppc_link_hash_table *htab;
6849 char save;
6850
6851 /* We aren't supposed to use alloca in BFD because on
6852 systems which do not have alloca the version in libiberty
6853 calls xmalloc, which might cause the program to crash
6854 when it runs out of memory. This function doesn't have a
6855 return status, so there's no way to gracefully return an
6856 error. So cheat. We know that string[-1] can be safely
6857 accessed; It's either a string in an ELF string table,
6858 or allocated in an objalloc structure. */
6859
6860 p = eh->elf.root.root.string - 1;
6861 save = *p;
6862 *(char *) p = '.';
6863 htab = ppc_hash_table (info);
6864 if (htab == NULL)
6865 return;
6866
6867 fh = (struct ppc_link_hash_entry *)
6868 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6869 *(char *) p = save;
6870
6871 /* Unfortunately, if it so happens that the string we were
6872 looking for was allocated immediately before this string,
6873 then we overwrote the string terminator. That's the only
6874 reason the lookup should fail. */
6875 if (fh == NULL)
6876 {
6877 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6878 while (q >= eh->elf.root.root.string && *q == *p)
6879 --q, --p;
6880 if (q < eh->elf.root.root.string && *p == '.')
6881 fh = (struct ppc_link_hash_entry *)
6882 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6883 }
6884 if (fh != NULL)
6885 {
6886 eh->oh = fh;
6887 fh->oh = eh;
6888 }
6889 }
6890 if (fh != NULL)
6891 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6892 }
6893 }
6894
6895 static bfd_boolean
6896 get_sym_h (struct elf_link_hash_entry **hp,
6897 Elf_Internal_Sym **symp,
6898 asection **symsecp,
6899 unsigned char **tls_maskp,
6900 Elf_Internal_Sym **locsymsp,
6901 unsigned long r_symndx,
6902 bfd *ibfd)
6903 {
6904 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6905
6906 if (r_symndx >= symtab_hdr->sh_info)
6907 {
6908 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6909 struct elf_link_hash_entry *h;
6910
6911 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6912 h = elf_follow_link (h);
6913
6914 if (hp != NULL)
6915 *hp = h;
6916
6917 if (symp != NULL)
6918 *symp = NULL;
6919
6920 if (symsecp != NULL)
6921 {
6922 asection *symsec = NULL;
6923 if (h->root.type == bfd_link_hash_defined
6924 || h->root.type == bfd_link_hash_defweak)
6925 symsec = h->root.u.def.section;
6926 *symsecp = symsec;
6927 }
6928
6929 if (tls_maskp != NULL)
6930 {
6931 struct ppc_link_hash_entry *eh;
6932
6933 eh = (struct ppc_link_hash_entry *) h;
6934 *tls_maskp = &eh->tls_mask;
6935 }
6936 }
6937 else
6938 {
6939 Elf_Internal_Sym *sym;
6940 Elf_Internal_Sym *locsyms = *locsymsp;
6941
6942 if (locsyms == NULL)
6943 {
6944 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6945 if (locsyms == NULL)
6946 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6947 symtab_hdr->sh_info,
6948 0, NULL, NULL, NULL);
6949 if (locsyms == NULL)
6950 return FALSE;
6951 *locsymsp = locsyms;
6952 }
6953 sym = locsyms + r_symndx;
6954
6955 if (hp != NULL)
6956 *hp = NULL;
6957
6958 if (symp != NULL)
6959 *symp = sym;
6960
6961 if (symsecp != NULL)
6962 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6963
6964 if (tls_maskp != NULL)
6965 {
6966 struct got_entry **lgot_ents;
6967 unsigned char *tls_mask;
6968
6969 tls_mask = NULL;
6970 lgot_ents = elf_local_got_ents (ibfd);
6971 if (lgot_ents != NULL)
6972 {
6973 struct plt_entry **local_plt = (struct plt_entry **)
6974 (lgot_ents + symtab_hdr->sh_info);
6975 unsigned char *lgot_masks = (unsigned char *)
6976 (local_plt + symtab_hdr->sh_info);
6977 tls_mask = &lgot_masks[r_symndx];
6978 }
6979 *tls_maskp = tls_mask;
6980 }
6981 }
6982 return TRUE;
6983 }
6984
6985 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6986 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6987 type suitable for optimization, and 1 otherwise. */
6988
6989 static int
6990 get_tls_mask (unsigned char **tls_maskp,
6991 unsigned long *toc_symndx,
6992 bfd_vma *toc_addend,
6993 Elf_Internal_Sym **locsymsp,
6994 const Elf_Internal_Rela *rel,
6995 bfd *ibfd)
6996 {
6997 unsigned long r_symndx;
6998 int next_r;
6999 struct elf_link_hash_entry *h;
7000 Elf_Internal_Sym *sym;
7001 asection *sec;
7002 bfd_vma off;
7003
7004 r_symndx = ELF64_R_SYM (rel->r_info);
7005 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7006 return 0;
7007
7008 if ((*tls_maskp != NULL && **tls_maskp != 0)
7009 || sec == NULL
7010 || ppc64_elf_section_data (sec) == NULL
7011 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
7012 return 1;
7013
7014 /* Look inside a TOC section too. */
7015 if (h != NULL)
7016 {
7017 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
7018 off = h->root.u.def.value;
7019 }
7020 else
7021 off = sym->st_value;
7022 off += rel->r_addend;
7023 BFD_ASSERT (off % 8 == 0);
7024 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
7025 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
7026 if (toc_symndx != NULL)
7027 *toc_symndx = r_symndx;
7028 if (toc_addend != NULL)
7029 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
7030 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
7031 return 0;
7032 if ((h == NULL || is_static_defined (h))
7033 && (next_r == -1 || next_r == -2))
7034 return 1 - next_r;
7035 return 1;
7036 }
7037
7038 /* Find (or create) an entry in the tocsave hash table. */
7039
7040 static struct tocsave_entry *
7041 tocsave_find (struct ppc_link_hash_table *htab,
7042 enum insert_option insert,
7043 Elf_Internal_Sym **local_syms,
7044 const Elf_Internal_Rela *irela,
7045 bfd *ibfd)
7046 {
7047 unsigned long r_indx;
7048 struct elf_link_hash_entry *h;
7049 Elf_Internal_Sym *sym;
7050 struct tocsave_entry ent, *p;
7051 hashval_t hash;
7052 struct tocsave_entry **slot;
7053
7054 r_indx = ELF64_R_SYM (irela->r_info);
7055 if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd))
7056 return NULL;
7057 if (ent.sec == NULL || ent.sec->output_section == NULL)
7058 {
7059 (*_bfd_error_handler)
7060 (_("%B: undefined symbol on R_PPC64_TOCSAVE relocation"));
7061 return NULL;
7062 }
7063
7064 if (h != NULL)
7065 ent.offset = h->root.u.def.value;
7066 else
7067 ent.offset = sym->st_value;
7068 ent.offset += irela->r_addend;
7069
7070 hash = tocsave_htab_hash (&ent);
7071 slot = ((struct tocsave_entry **)
7072 htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert));
7073 if (slot == NULL)
7074 return NULL;
7075
7076 if (*slot == NULL)
7077 {
7078 p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p));
7079 if (p == NULL)
7080 return NULL;
7081 *p = ent;
7082 *slot = p;
7083 }
7084 return *slot;
7085 }
7086
7087 /* Adjust all global syms defined in opd sections. In gcc generated
7088 code for the old ABI, these will already have been done. */
7089
7090 static bfd_boolean
7091 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
7092 {
7093 struct ppc_link_hash_entry *eh;
7094 asection *sym_sec;
7095 struct _opd_sec_data *opd;
7096
7097 if (h->root.type == bfd_link_hash_indirect)
7098 return TRUE;
7099
7100 if (h->root.type != bfd_link_hash_defined
7101 && h->root.type != bfd_link_hash_defweak)
7102 return TRUE;
7103
7104 eh = (struct ppc_link_hash_entry *) h;
7105 if (eh->adjust_done)
7106 return TRUE;
7107
7108 sym_sec = eh->elf.root.u.def.section;
7109 opd = get_opd_info (sym_sec);
7110 if (opd != NULL && opd->adjust != NULL)
7111 {
7112 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
7113 if (adjust == -1)
7114 {
7115 /* This entry has been deleted. */
7116 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
7117 if (dsec == NULL)
7118 {
7119 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
7120 if (discarded_section (dsec))
7121 {
7122 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
7123 break;
7124 }
7125 }
7126 eh->elf.root.u.def.value = 0;
7127 eh->elf.root.u.def.section = dsec;
7128 }
7129 else
7130 eh->elf.root.u.def.value += adjust;
7131 eh->adjust_done = 1;
7132 }
7133 return TRUE;
7134 }
7135
7136 /* Handles decrementing dynamic reloc counts for the reloc specified by
7137 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM
7138 have already been determined. */
7139
7140 static bfd_boolean
7141 dec_dynrel_count (bfd_vma r_info,
7142 asection *sec,
7143 struct bfd_link_info *info,
7144 Elf_Internal_Sym **local_syms,
7145 struct elf_link_hash_entry *h,
7146 Elf_Internal_Sym *sym)
7147 {
7148 enum elf_ppc64_reloc_type r_type;
7149 asection *sym_sec = NULL;
7150
7151 /* Can this reloc be dynamic? This switch, and later tests here
7152 should be kept in sync with the code in check_relocs. */
7153 r_type = ELF64_R_TYPE (r_info);
7154 switch (r_type)
7155 {
7156 default:
7157 return TRUE;
7158
7159 case R_PPC64_TPREL16:
7160 case R_PPC64_TPREL16_LO:
7161 case R_PPC64_TPREL16_HI:
7162 case R_PPC64_TPREL16_HA:
7163 case R_PPC64_TPREL16_DS:
7164 case R_PPC64_TPREL16_LO_DS:
7165 case R_PPC64_TPREL16_HIGH:
7166 case R_PPC64_TPREL16_HIGHA:
7167 case R_PPC64_TPREL16_HIGHER:
7168 case R_PPC64_TPREL16_HIGHERA:
7169 case R_PPC64_TPREL16_HIGHEST:
7170 case R_PPC64_TPREL16_HIGHESTA:
7171 if (!info->shared)
7172 return TRUE;
7173
7174 case R_PPC64_TPREL64:
7175 case R_PPC64_DTPMOD64:
7176 case R_PPC64_DTPREL64:
7177 case R_PPC64_ADDR64:
7178 case R_PPC64_REL30:
7179 case R_PPC64_REL32:
7180 case R_PPC64_REL64:
7181 case R_PPC64_ADDR14:
7182 case R_PPC64_ADDR14_BRNTAKEN:
7183 case R_PPC64_ADDR14_BRTAKEN:
7184 case R_PPC64_ADDR16:
7185 case R_PPC64_ADDR16_DS:
7186 case R_PPC64_ADDR16_HA:
7187 case R_PPC64_ADDR16_HI:
7188 case R_PPC64_ADDR16_HIGH:
7189 case R_PPC64_ADDR16_HIGHA:
7190 case R_PPC64_ADDR16_HIGHER:
7191 case R_PPC64_ADDR16_HIGHERA:
7192 case R_PPC64_ADDR16_HIGHEST:
7193 case R_PPC64_ADDR16_HIGHESTA:
7194 case R_PPC64_ADDR16_LO:
7195 case R_PPC64_ADDR16_LO_DS:
7196 case R_PPC64_ADDR24:
7197 case R_PPC64_ADDR32:
7198 case R_PPC64_UADDR16:
7199 case R_PPC64_UADDR32:
7200 case R_PPC64_UADDR64:
7201 case R_PPC64_TOC:
7202 break;
7203 }
7204
7205 if (local_syms != NULL)
7206 {
7207 unsigned long r_symndx;
7208 bfd *ibfd = sec->owner;
7209
7210 r_symndx = ELF64_R_SYM (r_info);
7211 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
7212 return FALSE;
7213 }
7214
7215 if ((info->shared
7216 && (must_be_dyn_reloc (info, r_type)
7217 || (h != NULL
7218 && (!SYMBOLIC_BIND (info, h)
7219 || h->root.type == bfd_link_hash_defweak
7220 || !h->def_regular))))
7221 || (ELIMINATE_COPY_RELOCS
7222 && !info->shared
7223 && h != NULL
7224 && (h->root.type == bfd_link_hash_defweak
7225 || !h->def_regular)))
7226 ;
7227 else
7228 return TRUE;
7229
7230 if (h != NULL)
7231 {
7232 struct elf_dyn_relocs *p;
7233 struct elf_dyn_relocs **pp;
7234 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
7235
7236 /* elf_gc_sweep may have already removed all dyn relocs associated
7237 with local syms for a given section. Also, symbol flags are
7238 changed by elf_gc_sweep_symbol, confusing the test above. Don't
7239 report a dynreloc miscount. */
7240 if (*pp == NULL && info->gc_sections)
7241 return TRUE;
7242
7243 while ((p = *pp) != NULL)
7244 {
7245 if (p->sec == sec)
7246 {
7247 if (!must_be_dyn_reloc (info, r_type))
7248 p->pc_count -= 1;
7249 p->count -= 1;
7250 if (p->count == 0)
7251 *pp = p->next;
7252 return TRUE;
7253 }
7254 pp = &p->next;
7255 }
7256 }
7257 else
7258 {
7259 struct ppc_dyn_relocs *p;
7260 struct ppc_dyn_relocs **pp;
7261 void *vpp;
7262 bfd_boolean is_ifunc;
7263
7264 if (local_syms == NULL)
7265 sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
7266 if (sym_sec == NULL)
7267 sym_sec = sec;
7268
7269 vpp = &elf_section_data (sym_sec)->local_dynrel;
7270 pp = (struct ppc_dyn_relocs **) vpp;
7271
7272 if (*pp == NULL && info->gc_sections)
7273 return TRUE;
7274
7275 is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC;
7276 while ((p = *pp) != NULL)
7277 {
7278 if (p->sec == sec && p->ifunc == is_ifunc)
7279 {
7280 p->count -= 1;
7281 if (p->count == 0)
7282 *pp = p->next;
7283 return TRUE;
7284 }
7285 pp = &p->next;
7286 }
7287 }
7288
7289 info->callbacks->einfo (_("%P: dynreloc miscount for %B, section %A\n"),
7290 sec->owner, sec);
7291 bfd_set_error (bfd_error_bad_value);
7292 return FALSE;
7293 }
7294
7295 /* Remove unused Official Procedure Descriptor entries. Currently we
7296 only remove those associated with functions in discarded link-once
7297 sections, or weakly defined functions that have been overridden. It
7298 would be possible to remove many more entries for statically linked
7299 applications. */
7300
7301 bfd_boolean
7302 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
7303 {
7304 bfd *ibfd;
7305 bfd_boolean some_edited = FALSE;
7306 asection *need_pad = NULL;
7307
7308 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7309 {
7310 asection *sec;
7311 Elf_Internal_Rela *relstart, *rel, *relend;
7312 Elf_Internal_Shdr *symtab_hdr;
7313 Elf_Internal_Sym *local_syms;
7314 bfd_vma offset;
7315 struct _opd_sec_data *opd;
7316 bfd_boolean need_edit, add_aux_fields;
7317 bfd_size_type cnt_16b = 0;
7318
7319 if (!is_ppc64_elf (ibfd))
7320 continue;
7321
7322 sec = bfd_get_section_by_name (ibfd, ".opd");
7323 if (sec == NULL || sec->size == 0)
7324 continue;
7325
7326 if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
7327 continue;
7328
7329 if (sec->output_section == bfd_abs_section_ptr)
7330 continue;
7331
7332 /* Look through the section relocs. */
7333 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
7334 continue;
7335
7336 local_syms = NULL;
7337 symtab_hdr = &elf_symtab_hdr (ibfd);
7338
7339 /* Read the relocations. */
7340 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7341 info->keep_memory);
7342 if (relstart == NULL)
7343 return FALSE;
7344
7345 /* First run through the relocs to check they are sane, and to
7346 determine whether we need to edit this opd section. */
7347 need_edit = FALSE;
7348 need_pad = sec;
7349 offset = 0;
7350 relend = relstart + sec->reloc_count;
7351 for (rel = relstart; rel < relend; )
7352 {
7353 enum elf_ppc64_reloc_type r_type;
7354 unsigned long r_symndx;
7355 asection *sym_sec;
7356 struct elf_link_hash_entry *h;
7357 Elf_Internal_Sym *sym;
7358
7359 /* .opd contains a regular array of 16 or 24 byte entries. We're
7360 only interested in the reloc pointing to a function entry
7361 point. */
7362 if (rel->r_offset != offset
7363 || rel + 1 >= relend
7364 || (rel + 1)->r_offset != offset + 8)
7365 {
7366 /* If someone messes with .opd alignment then after a
7367 "ld -r" we might have padding in the middle of .opd.
7368 Also, there's nothing to prevent someone putting
7369 something silly in .opd with the assembler. No .opd
7370 optimization for them! */
7371 broken_opd:
7372 (*_bfd_error_handler)
7373 (_("%B: .opd is not a regular array of opd entries"), ibfd);
7374 need_edit = FALSE;
7375 break;
7376 }
7377
7378 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
7379 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
7380 {
7381 (*_bfd_error_handler)
7382 (_("%B: unexpected reloc type %u in .opd section"),
7383 ibfd, r_type);
7384 need_edit = FALSE;
7385 break;
7386 }
7387
7388 r_symndx = ELF64_R_SYM (rel->r_info);
7389 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7390 r_symndx, ibfd))
7391 goto error_ret;
7392
7393 if (sym_sec == NULL || sym_sec->owner == NULL)
7394 {
7395 const char *sym_name;
7396 if (h != NULL)
7397 sym_name = h->root.root.string;
7398 else
7399 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7400 sym_sec);
7401
7402 (*_bfd_error_handler)
7403 (_("%B: undefined sym `%s' in .opd section"),
7404 ibfd, sym_name);
7405 need_edit = FALSE;
7406 break;
7407 }
7408
7409 /* opd entries are always for functions defined in the
7410 current input bfd. If the symbol isn't defined in the
7411 input bfd, then we won't be using the function in this
7412 bfd; It must be defined in a linkonce section in another
7413 bfd, or is weak. It's also possible that we are
7414 discarding the function due to a linker script /DISCARD/,
7415 which we test for via the output_section. */
7416 if (sym_sec->owner != ibfd
7417 || sym_sec->output_section == bfd_abs_section_ptr)
7418 need_edit = TRUE;
7419
7420 rel += 2;
7421 if (rel == relend
7422 || (rel + 1 == relend && rel->r_offset == offset + 16))
7423 {
7424 if (sec->size == offset + 24)
7425 {
7426 need_pad = NULL;
7427 break;
7428 }
7429 if (rel == relend && sec->size == offset + 16)
7430 {
7431 cnt_16b++;
7432 break;
7433 }
7434 goto broken_opd;
7435 }
7436
7437 if (rel->r_offset == offset + 24)
7438 offset += 24;
7439 else if (rel->r_offset != offset + 16)
7440 goto broken_opd;
7441 else if (rel + 1 < relend
7442 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7443 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7444 {
7445 offset += 16;
7446 cnt_16b++;
7447 }
7448 else if (rel + 2 < relend
7449 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7450 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7451 {
7452 offset += 24;
7453 rel += 1;
7454 }
7455 else
7456 goto broken_opd;
7457 }
7458
7459 add_aux_fields = non_overlapping && cnt_16b > 0;
7460
7461 if (need_edit || add_aux_fields)
7462 {
7463 Elf_Internal_Rela *write_rel;
7464 Elf_Internal_Shdr *rel_hdr;
7465 bfd_byte *rptr, *wptr;
7466 bfd_byte *new_contents;
7467 bfd_boolean skip;
7468 long opd_ent_size;
7469 bfd_size_type amt;
7470
7471 new_contents = NULL;
7472 amt = sec->size * sizeof (long) / 8;
7473 opd = &ppc64_elf_section_data (sec)->u.opd;
7474 opd->adjust = bfd_zalloc (sec->owner, amt);
7475 if (opd->adjust == NULL)
7476 return FALSE;
7477 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7478
7479 /* This seems a waste of time as input .opd sections are all
7480 zeros as generated by gcc, but I suppose there's no reason
7481 this will always be so. We might start putting something in
7482 the third word of .opd entries. */
7483 if ((sec->flags & SEC_IN_MEMORY) == 0)
7484 {
7485 bfd_byte *loc;
7486 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7487 {
7488 if (loc != NULL)
7489 free (loc);
7490 error_ret:
7491 if (local_syms != NULL
7492 && symtab_hdr->contents != (unsigned char *) local_syms)
7493 free (local_syms);
7494 if (elf_section_data (sec)->relocs != relstart)
7495 free (relstart);
7496 return FALSE;
7497 }
7498 sec->contents = loc;
7499 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7500 }
7501
7502 elf_section_data (sec)->relocs = relstart;
7503
7504 new_contents = sec->contents;
7505 if (add_aux_fields)
7506 {
7507 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7508 if (new_contents == NULL)
7509 return FALSE;
7510 need_pad = FALSE;
7511 }
7512 wptr = new_contents;
7513 rptr = sec->contents;
7514
7515 write_rel = relstart;
7516 skip = FALSE;
7517 offset = 0;
7518 opd_ent_size = 0;
7519 for (rel = relstart; rel < relend; rel++)
7520 {
7521 unsigned long r_symndx;
7522 asection *sym_sec;
7523 struct elf_link_hash_entry *h;
7524 Elf_Internal_Sym *sym;
7525
7526 r_symndx = ELF64_R_SYM (rel->r_info);
7527 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7528 r_symndx, ibfd))
7529 goto error_ret;
7530
7531 if (rel->r_offset == offset)
7532 {
7533 struct ppc_link_hash_entry *fdh = NULL;
7534
7535 /* See if the .opd entry is full 24 byte or
7536 16 byte (with fd_aux entry overlapped with next
7537 fd_func). */
7538 opd_ent_size = 24;
7539 if ((rel + 2 == relend && sec->size == offset + 16)
7540 || (rel + 3 < relend
7541 && rel[2].r_offset == offset + 16
7542 && rel[3].r_offset == offset + 24
7543 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7544 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7545 opd_ent_size = 16;
7546
7547 if (h != NULL
7548 && h->root.root.string[0] == '.')
7549 {
7550 struct ppc_link_hash_table *htab;
7551
7552 htab = ppc_hash_table (info);
7553 if (htab != NULL)
7554 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7555 htab);
7556 if (fdh != NULL
7557 && fdh->elf.root.type != bfd_link_hash_defined
7558 && fdh->elf.root.type != bfd_link_hash_defweak)
7559 fdh = NULL;
7560 }
7561
7562 skip = (sym_sec->owner != ibfd
7563 || sym_sec->output_section == bfd_abs_section_ptr);
7564 if (skip)
7565 {
7566 if (fdh != NULL && sym_sec->owner == ibfd)
7567 {
7568 /* Arrange for the function descriptor sym
7569 to be dropped. */
7570 fdh->elf.root.u.def.value = 0;
7571 fdh->elf.root.u.def.section = sym_sec;
7572 }
7573 opd->adjust[rel->r_offset / 8] = -1;
7574 }
7575 else
7576 {
7577 /* We'll be keeping this opd entry. */
7578
7579 if (fdh != NULL)
7580 {
7581 /* Redefine the function descriptor symbol to
7582 this location in the opd section. It is
7583 necessary to update the value here rather
7584 than using an array of adjustments as we do
7585 for local symbols, because various places
7586 in the generic ELF code use the value
7587 stored in u.def.value. */
7588 fdh->elf.root.u.def.value = wptr - new_contents;
7589 fdh->adjust_done = 1;
7590 }
7591
7592 /* Local syms are a bit tricky. We could
7593 tweak them as they can be cached, but
7594 we'd need to look through the local syms
7595 for the function descriptor sym which we
7596 don't have at the moment. So keep an
7597 array of adjustments. */
7598 opd->adjust[rel->r_offset / 8]
7599 = (wptr - new_contents) - (rptr - sec->contents);
7600
7601 if (wptr != rptr)
7602 memcpy (wptr, rptr, opd_ent_size);
7603 wptr += opd_ent_size;
7604 if (add_aux_fields && opd_ent_size == 16)
7605 {
7606 memset (wptr, '\0', 8);
7607 wptr += 8;
7608 }
7609 }
7610 rptr += opd_ent_size;
7611 offset += opd_ent_size;
7612 }
7613
7614 if (skip)
7615 {
7616 if (!NO_OPD_RELOCS
7617 && !info->relocatable
7618 && !dec_dynrel_count (rel->r_info, sec, info,
7619 NULL, h, sym))
7620 goto error_ret;
7621 }
7622 else
7623 {
7624 /* We need to adjust any reloc offsets to point to the
7625 new opd entries. While we're at it, we may as well
7626 remove redundant relocs. */
7627 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7628 if (write_rel != rel)
7629 memcpy (write_rel, rel, sizeof (*rel));
7630 ++write_rel;
7631 }
7632 }
7633
7634 sec->size = wptr - new_contents;
7635 sec->reloc_count = write_rel - relstart;
7636 if (add_aux_fields)
7637 {
7638 free (sec->contents);
7639 sec->contents = new_contents;
7640 }
7641
7642 /* Fudge the header size too, as this is used later in
7643 elf_bfd_final_link if we are emitting relocs. */
7644 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7645 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7646 some_edited = TRUE;
7647 }
7648 else if (elf_section_data (sec)->relocs != relstart)
7649 free (relstart);
7650
7651 if (local_syms != NULL
7652 && symtab_hdr->contents != (unsigned char *) local_syms)
7653 {
7654 if (!info->keep_memory)
7655 free (local_syms);
7656 else
7657 symtab_hdr->contents = (unsigned char *) local_syms;
7658 }
7659 }
7660
7661 if (some_edited)
7662 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7663
7664 /* If we are doing a final link and the last .opd entry is just 16 byte
7665 long, add a 8 byte padding after it. */
7666 if (need_pad != NULL && !info->relocatable)
7667 {
7668 bfd_byte *p;
7669
7670 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7671 {
7672 BFD_ASSERT (need_pad->size > 0);
7673
7674 p = bfd_malloc (need_pad->size + 8);
7675 if (p == NULL)
7676 return FALSE;
7677
7678 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7679 p, 0, need_pad->size))
7680 return FALSE;
7681
7682 need_pad->contents = p;
7683 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7684 }
7685 else
7686 {
7687 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7688 if (p == NULL)
7689 return FALSE;
7690
7691 need_pad->contents = p;
7692 }
7693
7694 memset (need_pad->contents + need_pad->size, 0, 8);
7695 need_pad->size += 8;
7696 }
7697
7698 return TRUE;
7699 }
7700
7701 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7702
7703 asection *
7704 ppc64_elf_tls_setup (struct bfd_link_info *info,
7705 int no_tls_get_addr_opt,
7706 int *no_multi_toc)
7707 {
7708 struct ppc_link_hash_table *htab;
7709
7710 htab = ppc_hash_table (info);
7711 if (htab == NULL)
7712 return NULL;
7713
7714 if (*no_multi_toc)
7715 htab->do_multi_toc = 0;
7716 else if (!htab->do_multi_toc)
7717 *no_multi_toc = 1;
7718
7719 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7720 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7721 FALSE, FALSE, TRUE));
7722 /* Move dynamic linking info to the function descriptor sym. */
7723 if (htab->tls_get_addr != NULL)
7724 func_desc_adjust (&htab->tls_get_addr->elf, info);
7725 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7726 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7727 FALSE, FALSE, TRUE));
7728 if (!no_tls_get_addr_opt)
7729 {
7730 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7731
7732 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7733 FALSE, FALSE, TRUE);
7734 if (opt != NULL)
7735 func_desc_adjust (opt, info);
7736 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7737 FALSE, FALSE, TRUE);
7738 if (opt_fd != NULL
7739 && (opt_fd->root.type == bfd_link_hash_defined
7740 || opt_fd->root.type == bfd_link_hash_defweak))
7741 {
7742 /* If glibc supports an optimized __tls_get_addr call stub,
7743 signalled by the presence of __tls_get_addr_opt, and we'll
7744 be calling __tls_get_addr via a plt call stub, then
7745 make __tls_get_addr point to __tls_get_addr_opt. */
7746 tga_fd = &htab->tls_get_addr_fd->elf;
7747 if (htab->elf.dynamic_sections_created
7748 && tga_fd != NULL
7749 && (tga_fd->type == STT_FUNC
7750 || tga_fd->needs_plt)
7751 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7752 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7753 && tga_fd->root.type == bfd_link_hash_undefweak)))
7754 {
7755 struct plt_entry *ent;
7756
7757 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7758 if (ent->plt.refcount > 0)
7759 break;
7760 if (ent != NULL)
7761 {
7762 tga_fd->root.type = bfd_link_hash_indirect;
7763 tga_fd->root.u.i.link = &opt_fd->root;
7764 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7765 if (opt_fd->dynindx != -1)
7766 {
7767 /* Use __tls_get_addr_opt in dynamic relocations. */
7768 opt_fd->dynindx = -1;
7769 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7770 opt_fd->dynstr_index);
7771 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7772 return NULL;
7773 }
7774 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7775 tga = &htab->tls_get_addr->elf;
7776 if (opt != NULL && tga != NULL)
7777 {
7778 tga->root.type = bfd_link_hash_indirect;
7779 tga->root.u.i.link = &opt->root;
7780 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7781 _bfd_elf_link_hash_hide_symbol (info, opt,
7782 tga->forced_local);
7783 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7784 }
7785 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7786 htab->tls_get_addr_fd->is_func_descriptor = 1;
7787 if (htab->tls_get_addr != NULL)
7788 {
7789 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7790 htab->tls_get_addr->is_func = 1;
7791 }
7792 }
7793 }
7794 }
7795 else
7796 no_tls_get_addr_opt = TRUE;
7797 }
7798 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7799 return _bfd_elf_tls_setup (info->output_bfd, info);
7800 }
7801
7802 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7803 HASH1 or HASH2. */
7804
7805 static bfd_boolean
7806 branch_reloc_hash_match (const bfd *ibfd,
7807 const Elf_Internal_Rela *rel,
7808 const struct ppc_link_hash_entry *hash1,
7809 const struct ppc_link_hash_entry *hash2)
7810 {
7811 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7812 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7813 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7814
7815 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7816 {
7817 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7818 struct elf_link_hash_entry *h;
7819
7820 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7821 h = elf_follow_link (h);
7822 if (h == &hash1->elf || h == &hash2->elf)
7823 return TRUE;
7824 }
7825 return FALSE;
7826 }
7827
7828 /* Run through all the TLS relocs looking for optimization
7829 opportunities. The linker has been hacked (see ppc64elf.em) to do
7830 a preliminary section layout so that we know the TLS segment
7831 offsets. We can't optimize earlier because some optimizations need
7832 to know the tp offset, and we need to optimize before allocating
7833 dynamic relocations. */
7834
7835 bfd_boolean
7836 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7837 {
7838 bfd *ibfd;
7839 asection *sec;
7840 struct ppc_link_hash_table *htab;
7841 unsigned char *toc_ref;
7842 int pass;
7843
7844 if (info->relocatable || !info->executable)
7845 return TRUE;
7846
7847 htab = ppc_hash_table (info);
7848 if (htab == NULL)
7849 return FALSE;
7850
7851 /* Make two passes over the relocs. On the first pass, mark toc
7852 entries involved with tls relocs, and check that tls relocs
7853 involved in setting up a tls_get_addr call are indeed followed by
7854 such a call. If they are not, we can't do any tls optimization.
7855 On the second pass twiddle tls_mask flags to notify
7856 relocate_section that optimization can be done, and adjust got
7857 and plt refcounts. */
7858 toc_ref = NULL;
7859 for (pass = 0; pass < 2; ++pass)
7860 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7861 {
7862 Elf_Internal_Sym *locsyms = NULL;
7863 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7864
7865 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7866 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7867 {
7868 Elf_Internal_Rela *relstart, *rel, *relend;
7869 bfd_boolean found_tls_get_addr_arg = 0;
7870
7871 /* Read the relocations. */
7872 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7873 info->keep_memory);
7874 if (relstart == NULL)
7875 return FALSE;
7876
7877 relend = relstart + sec->reloc_count;
7878 for (rel = relstart; rel < relend; rel++)
7879 {
7880 enum elf_ppc64_reloc_type r_type;
7881 unsigned long r_symndx;
7882 struct elf_link_hash_entry *h;
7883 Elf_Internal_Sym *sym;
7884 asection *sym_sec;
7885 unsigned char *tls_mask;
7886 unsigned char tls_set, tls_clear, tls_type = 0;
7887 bfd_vma value;
7888 bfd_boolean ok_tprel, is_local;
7889 long toc_ref_index = 0;
7890 int expecting_tls_get_addr = 0;
7891 bfd_boolean ret = FALSE;
7892
7893 r_symndx = ELF64_R_SYM (rel->r_info);
7894 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7895 r_symndx, ibfd))
7896 {
7897 err_free_rel:
7898 if (elf_section_data (sec)->relocs != relstart)
7899 free (relstart);
7900 if (toc_ref != NULL)
7901 free (toc_ref);
7902 if (locsyms != NULL
7903 && (elf_symtab_hdr (ibfd).contents
7904 != (unsigned char *) locsyms))
7905 free (locsyms);
7906 return ret;
7907 }
7908
7909 if (h != NULL)
7910 {
7911 if (h->root.type == bfd_link_hash_defined
7912 || h->root.type == bfd_link_hash_defweak)
7913 value = h->root.u.def.value;
7914 else if (h->root.type == bfd_link_hash_undefweak)
7915 value = 0;
7916 else
7917 {
7918 found_tls_get_addr_arg = 0;
7919 continue;
7920 }
7921 }
7922 else
7923 /* Symbols referenced by TLS relocs must be of type
7924 STT_TLS. So no need for .opd local sym adjust. */
7925 value = sym->st_value;
7926
7927 ok_tprel = FALSE;
7928 is_local = FALSE;
7929 if (h == NULL
7930 || !h->def_dynamic)
7931 {
7932 is_local = TRUE;
7933 if (h != NULL
7934 && h->root.type == bfd_link_hash_undefweak)
7935 ok_tprel = TRUE;
7936 else
7937 {
7938 value += sym_sec->output_offset;
7939 value += sym_sec->output_section->vma;
7940 value -= htab->elf.tls_sec->vma;
7941 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7942 < (bfd_vma) 1 << 32);
7943 }
7944 }
7945
7946 r_type = ELF64_R_TYPE (rel->r_info);
7947 /* If this section has old-style __tls_get_addr calls
7948 without marker relocs, then check that each
7949 __tls_get_addr call reloc is preceded by a reloc
7950 that conceivably belongs to the __tls_get_addr arg
7951 setup insn. If we don't find matching arg setup
7952 relocs, don't do any tls optimization. */
7953 if (pass == 0
7954 && sec->has_tls_get_addr_call
7955 && h != NULL
7956 && (h == &htab->tls_get_addr->elf
7957 || h == &htab->tls_get_addr_fd->elf)
7958 && !found_tls_get_addr_arg
7959 && is_branch_reloc (r_type))
7960 {
7961 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7962 "TLS optimization disabled\n"),
7963 ibfd, sec, rel->r_offset);
7964 ret = TRUE;
7965 goto err_free_rel;
7966 }
7967
7968 found_tls_get_addr_arg = 0;
7969 switch (r_type)
7970 {
7971 case R_PPC64_GOT_TLSLD16:
7972 case R_PPC64_GOT_TLSLD16_LO:
7973 expecting_tls_get_addr = 1;
7974 found_tls_get_addr_arg = 1;
7975 /* Fall thru */
7976
7977 case R_PPC64_GOT_TLSLD16_HI:
7978 case R_PPC64_GOT_TLSLD16_HA:
7979 /* These relocs should never be against a symbol
7980 defined in a shared lib. Leave them alone if
7981 that turns out to be the case. */
7982 if (!is_local)
7983 continue;
7984
7985 /* LD -> LE */
7986 tls_set = 0;
7987 tls_clear = TLS_LD;
7988 tls_type = TLS_TLS | TLS_LD;
7989 break;
7990
7991 case R_PPC64_GOT_TLSGD16:
7992 case R_PPC64_GOT_TLSGD16_LO:
7993 expecting_tls_get_addr = 1;
7994 found_tls_get_addr_arg = 1;
7995 /* Fall thru */
7996
7997 case R_PPC64_GOT_TLSGD16_HI:
7998 case R_PPC64_GOT_TLSGD16_HA:
7999 if (ok_tprel)
8000 /* GD -> LE */
8001 tls_set = 0;
8002 else
8003 /* GD -> IE */
8004 tls_set = TLS_TLS | TLS_TPRELGD;
8005 tls_clear = TLS_GD;
8006 tls_type = TLS_TLS | TLS_GD;
8007 break;
8008
8009 case R_PPC64_GOT_TPREL16_DS:
8010 case R_PPC64_GOT_TPREL16_LO_DS:
8011 case R_PPC64_GOT_TPREL16_HI:
8012 case R_PPC64_GOT_TPREL16_HA:
8013 if (ok_tprel)
8014 {
8015 /* IE -> LE */
8016 tls_set = 0;
8017 tls_clear = TLS_TPREL;
8018 tls_type = TLS_TLS | TLS_TPREL;
8019 break;
8020 }
8021 continue;
8022
8023 case R_PPC64_TLSGD:
8024 case R_PPC64_TLSLD:
8025 found_tls_get_addr_arg = 1;
8026 /* Fall thru */
8027
8028 case R_PPC64_TLS:
8029 case R_PPC64_TOC16:
8030 case R_PPC64_TOC16_LO:
8031 if (sym_sec == NULL || sym_sec != toc)
8032 continue;
8033
8034 /* Mark this toc entry as referenced by a TLS
8035 code sequence. We can do that now in the
8036 case of R_PPC64_TLS, and after checking for
8037 tls_get_addr for the TOC16 relocs. */
8038 if (toc_ref == NULL)
8039 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
8040 if (toc_ref == NULL)
8041 goto err_free_rel;
8042
8043 if (h != NULL)
8044 value = h->root.u.def.value;
8045 else
8046 value = sym->st_value;
8047 value += rel->r_addend;
8048 BFD_ASSERT (value < toc->size && value % 8 == 0);
8049 toc_ref_index = (value + toc->output_offset) / 8;
8050 if (r_type == R_PPC64_TLS
8051 || r_type == R_PPC64_TLSGD
8052 || r_type == R_PPC64_TLSLD)
8053 {
8054 toc_ref[toc_ref_index] = 1;
8055 continue;
8056 }
8057
8058 if (pass != 0 && toc_ref[toc_ref_index] == 0)
8059 continue;
8060
8061 tls_set = 0;
8062 tls_clear = 0;
8063 expecting_tls_get_addr = 2;
8064 break;
8065
8066 case R_PPC64_TPREL64:
8067 if (pass == 0
8068 || sec != toc
8069 || toc_ref == NULL
8070 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8071 continue;
8072 if (ok_tprel)
8073 {
8074 /* IE -> LE */
8075 tls_set = TLS_EXPLICIT;
8076 tls_clear = TLS_TPREL;
8077 break;
8078 }
8079 continue;
8080
8081 case R_PPC64_DTPMOD64:
8082 if (pass == 0
8083 || sec != toc
8084 || toc_ref == NULL
8085 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
8086 continue;
8087 if (rel + 1 < relend
8088 && (rel[1].r_info
8089 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
8090 && rel[1].r_offset == rel->r_offset + 8)
8091 {
8092 if (ok_tprel)
8093 /* GD -> LE */
8094 tls_set = TLS_EXPLICIT | TLS_GD;
8095 else
8096 /* GD -> IE */
8097 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
8098 tls_clear = TLS_GD;
8099 }
8100 else
8101 {
8102 if (!is_local)
8103 continue;
8104
8105 /* LD -> LE */
8106 tls_set = TLS_EXPLICIT;
8107 tls_clear = TLS_LD;
8108 }
8109 break;
8110
8111 default:
8112 continue;
8113 }
8114
8115 if (pass == 0)
8116 {
8117 if (!expecting_tls_get_addr
8118 || !sec->has_tls_get_addr_call)
8119 continue;
8120
8121 if (rel + 1 < relend
8122 && branch_reloc_hash_match (ibfd, rel + 1,
8123 htab->tls_get_addr,
8124 htab->tls_get_addr_fd))
8125 {
8126 if (expecting_tls_get_addr == 2)
8127 {
8128 /* Check for toc tls entries. */
8129 unsigned char *toc_tls;
8130 int retval;
8131
8132 retval = get_tls_mask (&toc_tls, NULL, NULL,
8133 &locsyms,
8134 rel, ibfd);
8135 if (retval == 0)
8136 goto err_free_rel;
8137 if (toc_tls != NULL)
8138 {
8139 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
8140 found_tls_get_addr_arg = 1;
8141 if (retval > 1)
8142 toc_ref[toc_ref_index] = 1;
8143 }
8144 }
8145 continue;
8146 }
8147
8148 if (expecting_tls_get_addr != 1)
8149 continue;
8150
8151 /* Uh oh, we didn't find the expected call. We
8152 could just mark this symbol to exclude it
8153 from tls optimization but it's safer to skip
8154 the entire optimization. */
8155 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
8156 "TLS optimization disabled\n"),
8157 ibfd, sec, rel->r_offset);
8158 ret = TRUE;
8159 goto err_free_rel;
8160 }
8161
8162 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
8163 {
8164 struct plt_entry *ent;
8165 for (ent = htab->tls_get_addr->elf.plt.plist;
8166 ent != NULL;
8167 ent = ent->next)
8168 if (ent->addend == 0)
8169 {
8170 if (ent->plt.refcount > 0)
8171 {
8172 ent->plt.refcount -= 1;
8173 expecting_tls_get_addr = 0;
8174 }
8175 break;
8176 }
8177 }
8178
8179 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
8180 {
8181 struct plt_entry *ent;
8182 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
8183 ent != NULL;
8184 ent = ent->next)
8185 if (ent->addend == 0)
8186 {
8187 if (ent->plt.refcount > 0)
8188 ent->plt.refcount -= 1;
8189 break;
8190 }
8191 }
8192
8193 if (tls_clear == 0)
8194 continue;
8195
8196 if ((tls_set & TLS_EXPLICIT) == 0)
8197 {
8198 struct got_entry *ent;
8199
8200 /* Adjust got entry for this reloc. */
8201 if (h != NULL)
8202 ent = h->got.glist;
8203 else
8204 ent = elf_local_got_ents (ibfd)[r_symndx];
8205
8206 for (; ent != NULL; ent = ent->next)
8207 if (ent->addend == rel->r_addend
8208 && ent->owner == ibfd
8209 && ent->tls_type == tls_type)
8210 break;
8211 if (ent == NULL)
8212 abort ();
8213
8214 if (tls_set == 0)
8215 {
8216 /* We managed to get rid of a got entry. */
8217 if (ent->got.refcount > 0)
8218 ent->got.refcount -= 1;
8219 }
8220 }
8221 else
8222 {
8223 /* If we got rid of a DTPMOD/DTPREL reloc pair then
8224 we'll lose one or two dyn relocs. */
8225 if (!dec_dynrel_count (rel->r_info, sec, info,
8226 NULL, h, sym))
8227 return FALSE;
8228
8229 if (tls_set == (TLS_EXPLICIT | TLS_GD))
8230 {
8231 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
8232 NULL, h, sym))
8233 return FALSE;
8234 }
8235 }
8236
8237 *tls_mask |= tls_set;
8238 *tls_mask &= ~tls_clear;
8239 }
8240
8241 if (elf_section_data (sec)->relocs != relstart)
8242 free (relstart);
8243 }
8244
8245 if (locsyms != NULL
8246 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
8247 {
8248 if (!info->keep_memory)
8249 free (locsyms);
8250 else
8251 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
8252 }
8253 }
8254
8255 if (toc_ref != NULL)
8256 free (toc_ref);
8257 return TRUE;
8258 }
8259
8260 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
8261 the values of any global symbols in a toc section that has been
8262 edited. Globals in toc sections should be a rarity, so this function
8263 sets a flag if any are found in toc sections other than the one just
8264 edited, so that futher hash table traversals can be avoided. */
8265
8266 struct adjust_toc_info
8267 {
8268 asection *toc;
8269 unsigned long *skip;
8270 bfd_boolean global_toc_syms;
8271 };
8272
8273 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
8274
8275 static bfd_boolean
8276 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
8277 {
8278 struct ppc_link_hash_entry *eh;
8279 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
8280 unsigned long i;
8281
8282 if (h->root.type != bfd_link_hash_defined
8283 && h->root.type != bfd_link_hash_defweak)
8284 return TRUE;
8285
8286 eh = (struct ppc_link_hash_entry *) h;
8287 if (eh->adjust_done)
8288 return TRUE;
8289
8290 if (eh->elf.root.u.def.section == toc_inf->toc)
8291 {
8292 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
8293 i = toc_inf->toc->rawsize >> 3;
8294 else
8295 i = eh->elf.root.u.def.value >> 3;
8296
8297 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
8298 {
8299 (*_bfd_error_handler)
8300 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
8301 do
8302 ++i;
8303 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
8304 eh->elf.root.u.def.value = (bfd_vma) i << 3;
8305 }
8306
8307 eh->elf.root.u.def.value -= toc_inf->skip[i];
8308 eh->adjust_done = 1;
8309 }
8310 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
8311 toc_inf->global_toc_syms = TRUE;
8312
8313 return TRUE;
8314 }
8315
8316 /* Return TRUE iff INSN is one we expect on a _LO variety toc/got reloc. */
8317
8318 static bfd_boolean
8319 ok_lo_toc_insn (unsigned int insn)
8320 {
8321 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8322 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8323 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8324 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8325 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8326 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8327 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8328 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8329 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8330 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8331 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8332 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8333 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8334 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8335 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8336 && (insn & 3) != 1)
8337 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8338 && ((insn & 3) == 0 || (insn & 3) == 3))
8339 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
8340 }
8341
8342 /* Examine all relocs referencing .toc sections in order to remove
8343 unused .toc entries. */
8344
8345 bfd_boolean
8346 ppc64_elf_edit_toc (struct bfd_link_info *info)
8347 {
8348 bfd *ibfd;
8349 struct adjust_toc_info toc_inf;
8350 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8351
8352 htab->do_toc_opt = 1;
8353 toc_inf.global_toc_syms = TRUE;
8354 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8355 {
8356 asection *toc, *sec;
8357 Elf_Internal_Shdr *symtab_hdr;
8358 Elf_Internal_Sym *local_syms;
8359 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
8360 unsigned long *skip, *drop;
8361 unsigned char *used;
8362 unsigned char *keep, last, some_unused;
8363
8364 if (!is_ppc64_elf (ibfd))
8365 continue;
8366
8367 toc = bfd_get_section_by_name (ibfd, ".toc");
8368 if (toc == NULL
8369 || toc->size == 0
8370 || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS
8371 || discarded_section (toc))
8372 continue;
8373
8374 toc_relocs = NULL;
8375 local_syms = NULL;
8376 symtab_hdr = &elf_symtab_hdr (ibfd);
8377
8378 /* Look at sections dropped from the final link. */
8379 skip = NULL;
8380 relstart = NULL;
8381 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8382 {
8383 if (sec->reloc_count == 0
8384 || !discarded_section (sec)
8385 || get_opd_info (sec)
8386 || (sec->flags & SEC_ALLOC) == 0
8387 || (sec->flags & SEC_DEBUGGING) != 0)
8388 continue;
8389
8390 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
8391 if (relstart == NULL)
8392 goto error_ret;
8393
8394 /* Run through the relocs to see which toc entries might be
8395 unused. */
8396 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8397 {
8398 enum elf_ppc64_reloc_type r_type;
8399 unsigned long r_symndx;
8400 asection *sym_sec;
8401 struct elf_link_hash_entry *h;
8402 Elf_Internal_Sym *sym;
8403 bfd_vma val;
8404
8405 r_type = ELF64_R_TYPE (rel->r_info);
8406 switch (r_type)
8407 {
8408 default:
8409 continue;
8410
8411 case R_PPC64_TOC16:
8412 case R_PPC64_TOC16_LO:
8413 case R_PPC64_TOC16_HI:
8414 case R_PPC64_TOC16_HA:
8415 case R_PPC64_TOC16_DS:
8416 case R_PPC64_TOC16_LO_DS:
8417 break;
8418 }
8419
8420 r_symndx = ELF64_R_SYM (rel->r_info);
8421 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8422 r_symndx, ibfd))
8423 goto error_ret;
8424
8425 if (sym_sec != toc)
8426 continue;
8427
8428 if (h != NULL)
8429 val = h->root.u.def.value;
8430 else
8431 val = sym->st_value;
8432 val += rel->r_addend;
8433
8434 if (val >= toc->size)
8435 continue;
8436
8437 /* Anything in the toc ought to be aligned to 8 bytes.
8438 If not, don't mark as unused. */
8439 if (val & 7)
8440 continue;
8441
8442 if (skip == NULL)
8443 {
8444 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8445 if (skip == NULL)
8446 goto error_ret;
8447 }
8448
8449 skip[val >> 3] = ref_from_discarded;
8450 }
8451
8452 if (elf_section_data (sec)->relocs != relstart)
8453 free (relstart);
8454 }
8455
8456 /* For largetoc loads of address constants, we can convert
8457 . addis rx,2,addr@got@ha
8458 . ld ry,addr@got@l(rx)
8459 to
8460 . addis rx,2,addr@toc@ha
8461 . addi ry,rx,addr@toc@l
8462 when addr is within 2G of the toc pointer. This then means
8463 that the word storing "addr" in the toc is no longer needed. */
8464
8465 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8466 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8467 && toc->reloc_count != 0)
8468 {
8469 /* Read toc relocs. */
8470 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8471 info->keep_memory);
8472 if (toc_relocs == NULL)
8473 goto error_ret;
8474
8475 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8476 {
8477 enum elf_ppc64_reloc_type r_type;
8478 unsigned long r_symndx;
8479 asection *sym_sec;
8480 struct elf_link_hash_entry *h;
8481 Elf_Internal_Sym *sym;
8482 bfd_vma val, addr;
8483
8484 r_type = ELF64_R_TYPE (rel->r_info);
8485 if (r_type != R_PPC64_ADDR64)
8486 continue;
8487
8488 r_symndx = ELF64_R_SYM (rel->r_info);
8489 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8490 r_symndx, ibfd))
8491 goto error_ret;
8492
8493 if (sym_sec == NULL
8494 || discarded_section (sym_sec))
8495 continue;
8496
8497 if (!SYMBOL_CALLS_LOCAL (info, h))
8498 continue;
8499
8500 if (h != NULL)
8501 {
8502 if (h->type == STT_GNU_IFUNC)
8503 continue;
8504 val = h->root.u.def.value;
8505 }
8506 else
8507 {
8508 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8509 continue;
8510 val = sym->st_value;
8511 }
8512 val += rel->r_addend;
8513 val += sym_sec->output_section->vma + sym_sec->output_offset;
8514
8515 /* We don't yet know the exact toc pointer value, but we
8516 know it will be somewhere in the toc section. Don't
8517 optimize if the difference from any possible toc
8518 pointer is outside [ff..f80008000, 7fff7fff]. */
8519 addr = toc->output_section->vma + TOC_BASE_OFF;
8520 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8521 continue;
8522
8523 addr = toc->output_section->vma + toc->output_section->rawsize;
8524 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8525 continue;
8526
8527 if (skip == NULL)
8528 {
8529 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8530 if (skip == NULL)
8531 goto error_ret;
8532 }
8533
8534 skip[rel->r_offset >> 3]
8535 |= can_optimize | ((rel - toc_relocs) << 2);
8536 }
8537 }
8538
8539 if (skip == NULL)
8540 continue;
8541
8542 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8543 if (used == NULL)
8544 {
8545 error_ret:
8546 if (local_syms != NULL
8547 && symtab_hdr->contents != (unsigned char *) local_syms)
8548 free (local_syms);
8549 if (sec != NULL
8550 && relstart != NULL
8551 && elf_section_data (sec)->relocs != relstart)
8552 free (relstart);
8553 if (toc_relocs != NULL
8554 && elf_section_data (toc)->relocs != toc_relocs)
8555 free (toc_relocs);
8556 if (skip != NULL)
8557 free (skip);
8558 return FALSE;
8559 }
8560
8561 /* Now check all kept sections that might reference the toc.
8562 Check the toc itself last. */
8563 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8564 : ibfd->sections);
8565 sec != NULL;
8566 sec = (sec == toc ? NULL
8567 : sec->next == NULL ? toc
8568 : sec->next == toc && toc->next ? toc->next
8569 : sec->next))
8570 {
8571 int repeat;
8572
8573 if (sec->reloc_count == 0
8574 || discarded_section (sec)
8575 || get_opd_info (sec)
8576 || (sec->flags & SEC_ALLOC) == 0
8577 || (sec->flags & SEC_DEBUGGING) != 0)
8578 continue;
8579
8580 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8581 info->keep_memory);
8582 if (relstart == NULL)
8583 goto error_ret;
8584
8585 /* Mark toc entries referenced as used. */
8586 do
8587 {
8588 repeat = 0;
8589 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8590 {
8591 enum elf_ppc64_reloc_type r_type;
8592 unsigned long r_symndx;
8593 asection *sym_sec;
8594 struct elf_link_hash_entry *h;
8595 Elf_Internal_Sym *sym;
8596 bfd_vma val;
8597 enum {no_check, check_lo, check_ha} insn_check;
8598
8599 r_type = ELF64_R_TYPE (rel->r_info);
8600 switch (r_type)
8601 {
8602 default:
8603 insn_check = no_check;
8604 break;
8605
8606 case R_PPC64_GOT_TLSLD16_HA:
8607 case R_PPC64_GOT_TLSGD16_HA:
8608 case R_PPC64_GOT_TPREL16_HA:
8609 case R_PPC64_GOT_DTPREL16_HA:
8610 case R_PPC64_GOT16_HA:
8611 case R_PPC64_TOC16_HA:
8612 insn_check = check_ha;
8613 break;
8614
8615 case R_PPC64_GOT_TLSLD16_LO:
8616 case R_PPC64_GOT_TLSGD16_LO:
8617 case R_PPC64_GOT_TPREL16_LO_DS:
8618 case R_PPC64_GOT_DTPREL16_LO_DS:
8619 case R_PPC64_GOT16_LO:
8620 case R_PPC64_GOT16_LO_DS:
8621 case R_PPC64_TOC16_LO:
8622 case R_PPC64_TOC16_LO_DS:
8623 insn_check = check_lo;
8624 break;
8625 }
8626
8627 if (insn_check != no_check)
8628 {
8629 bfd_vma off = rel->r_offset & ~3;
8630 unsigned char buf[4];
8631 unsigned int insn;
8632
8633 if (!bfd_get_section_contents (ibfd, sec, buf, off, 4))
8634 {
8635 free (used);
8636 goto error_ret;
8637 }
8638 insn = bfd_get_32 (ibfd, buf);
8639 if (insn_check == check_lo
8640 ? !ok_lo_toc_insn (insn)
8641 : ((insn & ((0x3f << 26) | 0x1f << 16))
8642 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
8643 {
8644 char str[12];
8645
8646 ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1;
8647 sprintf (str, "%#08x", insn);
8648 info->callbacks->einfo
8649 (_("%P: %H: toc optimization is not supported for"
8650 " %s instruction.\n"),
8651 ibfd, sec, rel->r_offset & ~3, str);
8652 }
8653 }
8654
8655 switch (r_type)
8656 {
8657 case R_PPC64_TOC16:
8658 case R_PPC64_TOC16_LO:
8659 case R_PPC64_TOC16_HI:
8660 case R_PPC64_TOC16_HA:
8661 case R_PPC64_TOC16_DS:
8662 case R_PPC64_TOC16_LO_DS:
8663 /* In case we're taking addresses of toc entries. */
8664 case R_PPC64_ADDR64:
8665 break;
8666
8667 default:
8668 continue;
8669 }
8670
8671 r_symndx = ELF64_R_SYM (rel->r_info);
8672 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8673 r_symndx, ibfd))
8674 {
8675 free (used);
8676 goto error_ret;
8677 }
8678
8679 if (sym_sec != toc)
8680 continue;
8681
8682 if (h != NULL)
8683 val = h->root.u.def.value;
8684 else
8685 val = sym->st_value;
8686 val += rel->r_addend;
8687
8688 if (val >= toc->size)
8689 continue;
8690
8691 if ((skip[val >> 3] & can_optimize) != 0)
8692 {
8693 bfd_vma off;
8694 unsigned char opc;
8695
8696 switch (r_type)
8697 {
8698 case R_PPC64_TOC16_HA:
8699 break;
8700
8701 case R_PPC64_TOC16_LO_DS:
8702 off = rel->r_offset;
8703 off += (bfd_big_endian (ibfd) ? -2 : 3);
8704 if (!bfd_get_section_contents (ibfd, sec, &opc,
8705 off, 1))
8706 {
8707 free (used);
8708 goto error_ret;
8709 }
8710 if ((opc & (0x3f << 2)) == (58u << 2))
8711 break;
8712 /* Fall thru */
8713
8714 default:
8715 /* Wrong sort of reloc, or not a ld. We may
8716 as well clear ref_from_discarded too. */
8717 skip[val >> 3] = 0;
8718 }
8719 }
8720
8721 if (sec != toc)
8722 used[val >> 3] = 1;
8723 /* For the toc section, we only mark as used if this
8724 entry itself isn't unused. */
8725 else if ((used[rel->r_offset >> 3]
8726 || !(skip[rel->r_offset >> 3] & ref_from_discarded))
8727 && !used[val >> 3])
8728 {
8729 /* Do all the relocs again, to catch reference
8730 chains. */
8731 repeat = 1;
8732 used[val >> 3] = 1;
8733 }
8734 }
8735 }
8736 while (repeat);
8737
8738 if (elf_section_data (sec)->relocs != relstart)
8739 free (relstart);
8740 }
8741
8742 /* Merge the used and skip arrays. Assume that TOC
8743 doublewords not appearing as either used or unused belong
8744 to to an entry more than one doubleword in size. */
8745 for (drop = skip, keep = used, last = 0, some_unused = 0;
8746 drop < skip + (toc->size + 7) / 8;
8747 ++drop, ++keep)
8748 {
8749 if (*keep)
8750 {
8751 *drop &= ~ref_from_discarded;
8752 if ((*drop & can_optimize) != 0)
8753 some_unused = 1;
8754 last = 0;
8755 }
8756 else if ((*drop & ref_from_discarded) != 0)
8757 {
8758 some_unused = 1;
8759 last = ref_from_discarded;
8760 }
8761 else
8762 *drop = last;
8763 }
8764
8765 free (used);
8766
8767 if (some_unused)
8768 {
8769 bfd_byte *contents, *src;
8770 unsigned long off;
8771 Elf_Internal_Sym *sym;
8772 bfd_boolean local_toc_syms = FALSE;
8773
8774 /* Shuffle the toc contents, and at the same time convert the
8775 skip array from booleans into offsets. */
8776 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8777 goto error_ret;
8778
8779 elf_section_data (toc)->this_hdr.contents = contents;
8780
8781 for (src = contents, off = 0, drop = skip;
8782 src < contents + toc->size;
8783 src += 8, ++drop)
8784 {
8785 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8786 off += 8;
8787 else if (off != 0)
8788 {
8789 *drop = off;
8790 memcpy (src - off, src, 8);
8791 }
8792 }
8793 *drop = off;
8794 toc->rawsize = toc->size;
8795 toc->size = src - contents - off;
8796
8797 /* Adjust addends for relocs against the toc section sym,
8798 and optimize any accesses we can. */
8799 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8800 {
8801 if (sec->reloc_count == 0
8802 || discarded_section (sec))
8803 continue;
8804
8805 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8806 info->keep_memory);
8807 if (relstart == NULL)
8808 goto error_ret;
8809
8810 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8811 {
8812 enum elf_ppc64_reloc_type r_type;
8813 unsigned long r_symndx;
8814 asection *sym_sec;
8815 struct elf_link_hash_entry *h;
8816 bfd_vma val;
8817
8818 r_type = ELF64_R_TYPE (rel->r_info);
8819 switch (r_type)
8820 {
8821 default:
8822 continue;
8823
8824 case R_PPC64_TOC16:
8825 case R_PPC64_TOC16_LO:
8826 case R_PPC64_TOC16_HI:
8827 case R_PPC64_TOC16_HA:
8828 case R_PPC64_TOC16_DS:
8829 case R_PPC64_TOC16_LO_DS:
8830 case R_PPC64_ADDR64:
8831 break;
8832 }
8833
8834 r_symndx = ELF64_R_SYM (rel->r_info);
8835 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8836 r_symndx, ibfd))
8837 goto error_ret;
8838
8839 if (sym_sec != toc)
8840 continue;
8841
8842 if (h != NULL)
8843 val = h->root.u.def.value;
8844 else
8845 {
8846 val = sym->st_value;
8847 if (val != 0)
8848 local_toc_syms = TRUE;
8849 }
8850
8851 val += rel->r_addend;
8852
8853 if (val > toc->rawsize)
8854 val = toc->rawsize;
8855 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8856 continue;
8857 else if ((skip[val >> 3] & can_optimize) != 0)
8858 {
8859 Elf_Internal_Rela *tocrel
8860 = toc_relocs + (skip[val >> 3] >> 2);
8861 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8862
8863 switch (r_type)
8864 {
8865 case R_PPC64_TOC16_HA:
8866 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8867 break;
8868
8869 case R_PPC64_TOC16_LO_DS:
8870 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8871 break;
8872
8873 default:
8874 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
8875 ppc_howto_init ();
8876 info->callbacks->einfo
8877 (_("%P: %H: %s references "
8878 "optimized away TOC entry\n"),
8879 ibfd, sec, rel->r_offset,
8880 ppc64_elf_howto_table[r_type]->name);
8881 bfd_set_error (bfd_error_bad_value);
8882 goto error_ret;
8883 }
8884 rel->r_addend = tocrel->r_addend;
8885 elf_section_data (sec)->relocs = relstart;
8886 continue;
8887 }
8888
8889 if (h != NULL || sym->st_value != 0)
8890 continue;
8891
8892 rel->r_addend -= skip[val >> 3];
8893 elf_section_data (sec)->relocs = relstart;
8894 }
8895
8896 if (elf_section_data (sec)->relocs != relstart)
8897 free (relstart);
8898 }
8899
8900 /* We shouldn't have local or global symbols defined in the TOC,
8901 but handle them anyway. */
8902 if (local_syms != NULL)
8903 for (sym = local_syms;
8904 sym < local_syms + symtab_hdr->sh_info;
8905 ++sym)
8906 if (sym->st_value != 0
8907 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8908 {
8909 unsigned long i;
8910
8911 if (sym->st_value > toc->rawsize)
8912 i = toc->rawsize >> 3;
8913 else
8914 i = sym->st_value >> 3;
8915
8916 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8917 {
8918 if (local_toc_syms)
8919 (*_bfd_error_handler)
8920 (_("%s defined on removed toc entry"),
8921 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8922 do
8923 ++i;
8924 while ((skip[i] & (ref_from_discarded | can_optimize)));
8925 sym->st_value = (bfd_vma) i << 3;
8926 }
8927
8928 sym->st_value -= skip[i];
8929 symtab_hdr->contents = (unsigned char *) local_syms;
8930 }
8931
8932 /* Adjust any global syms defined in this toc input section. */
8933 if (toc_inf.global_toc_syms)
8934 {
8935 toc_inf.toc = toc;
8936 toc_inf.skip = skip;
8937 toc_inf.global_toc_syms = FALSE;
8938 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8939 &toc_inf);
8940 }
8941
8942 if (toc->reloc_count != 0)
8943 {
8944 Elf_Internal_Shdr *rel_hdr;
8945 Elf_Internal_Rela *wrel;
8946 bfd_size_type sz;
8947
8948 /* Remove unused toc relocs, and adjust those we keep. */
8949 if (toc_relocs == NULL)
8950 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8951 info->keep_memory);
8952 if (toc_relocs == NULL)
8953 goto error_ret;
8954
8955 wrel = toc_relocs;
8956 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8957 if ((skip[rel->r_offset >> 3]
8958 & (ref_from_discarded | can_optimize)) == 0)
8959 {
8960 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8961 wrel->r_info = rel->r_info;
8962 wrel->r_addend = rel->r_addend;
8963 ++wrel;
8964 }
8965 else if (!dec_dynrel_count (rel->r_info, toc, info,
8966 &local_syms, NULL, NULL))
8967 goto error_ret;
8968
8969 elf_section_data (toc)->relocs = toc_relocs;
8970 toc->reloc_count = wrel - toc_relocs;
8971 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8972 sz = rel_hdr->sh_entsize;
8973 rel_hdr->sh_size = toc->reloc_count * sz;
8974 }
8975 }
8976 else if (toc_relocs != NULL
8977 && elf_section_data (toc)->relocs != toc_relocs)
8978 free (toc_relocs);
8979
8980 if (local_syms != NULL
8981 && symtab_hdr->contents != (unsigned char *) local_syms)
8982 {
8983 if (!info->keep_memory)
8984 free (local_syms);
8985 else
8986 symtab_hdr->contents = (unsigned char *) local_syms;
8987 }
8988 free (skip);
8989 }
8990
8991 return TRUE;
8992 }
8993
8994 /* Return true iff input section I references the TOC using
8995 instructions limited to +/-32k offsets. */
8996
8997 bfd_boolean
8998 ppc64_elf_has_small_toc_reloc (asection *i)
8999 {
9000 return (is_ppc64_elf (i->owner)
9001 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
9002 }
9003
9004 /* Allocate space for one GOT entry. */
9005
9006 static void
9007 allocate_got (struct elf_link_hash_entry *h,
9008 struct bfd_link_info *info,
9009 struct got_entry *gent)
9010 {
9011 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9012 bfd_boolean dyn;
9013 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9014 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
9015 ? 16 : 8);
9016 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
9017 ? 2 : 1) * sizeof (Elf64_External_Rela);
9018 asection *got = ppc64_elf_tdata (gent->owner)->got;
9019
9020 gent->got.offset = got->size;
9021 got->size += entsize;
9022
9023 dyn = htab->elf.dynamic_sections_created;
9024 if (h->type == STT_GNU_IFUNC)
9025 {
9026 htab->reliplt->size += rentsize;
9027 htab->got_reli_size += rentsize;
9028 }
9029 else if ((info->shared
9030 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
9031 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
9032 || h->root.type != bfd_link_hash_undefweak))
9033 {
9034 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
9035 relgot->size += rentsize;
9036 }
9037 }
9038
9039 /* This function merges got entries in the same toc group. */
9040
9041 static void
9042 merge_got_entries (struct got_entry **pent)
9043 {
9044 struct got_entry *ent, *ent2;
9045
9046 for (ent = *pent; ent != NULL; ent = ent->next)
9047 if (!ent->is_indirect)
9048 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
9049 if (!ent2->is_indirect
9050 && ent2->addend == ent->addend
9051 && ent2->tls_type == ent->tls_type
9052 && elf_gp (ent2->owner) == elf_gp (ent->owner))
9053 {
9054 ent2->is_indirect = TRUE;
9055 ent2->got.ent = ent;
9056 }
9057 }
9058
9059 /* Allocate space in .plt, .got and associated reloc sections for
9060 dynamic relocs. */
9061
9062 static bfd_boolean
9063 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9064 {
9065 struct bfd_link_info *info;
9066 struct ppc_link_hash_table *htab;
9067 asection *s;
9068 struct ppc_link_hash_entry *eh;
9069 struct elf_dyn_relocs *p;
9070 struct got_entry **pgent, *gent;
9071
9072 if (h->root.type == bfd_link_hash_indirect)
9073 return TRUE;
9074
9075 info = (struct bfd_link_info *) inf;
9076 htab = ppc_hash_table (info);
9077 if (htab == NULL)
9078 return FALSE;
9079
9080 if ((htab->elf.dynamic_sections_created
9081 && h->dynindx != -1
9082 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
9083 || h->type == STT_GNU_IFUNC)
9084 {
9085 struct plt_entry *pent;
9086 bfd_boolean doneone = FALSE;
9087 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
9088 if (pent->plt.refcount > 0)
9089 {
9090 if (!htab->elf.dynamic_sections_created
9091 || h->dynindx == -1)
9092 {
9093 s = htab->iplt;
9094 pent->plt.offset = s->size;
9095 s->size += PLT_ENTRY_SIZE;
9096 s = htab->reliplt;
9097 }
9098 else
9099 {
9100 /* If this is the first .plt entry, make room for the special
9101 first entry. */
9102 s = htab->plt;
9103 if (s->size == 0)
9104 s->size += PLT_INITIAL_ENTRY_SIZE;
9105
9106 pent->plt.offset = s->size;
9107
9108 /* Make room for this entry. */
9109 s->size += PLT_ENTRY_SIZE;
9110
9111 /* Make room for the .glink code. */
9112 s = htab->glink;
9113 if (s->size == 0)
9114 s->size += GLINK_CALL_STUB_SIZE;
9115 /* We need bigger stubs past index 32767. */
9116 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
9117 s->size += 4;
9118 s->size += 2*4;
9119
9120 /* We also need to make an entry in the .rela.plt section. */
9121 s = htab->relplt;
9122 }
9123 s->size += sizeof (Elf64_External_Rela);
9124 doneone = TRUE;
9125 }
9126 else
9127 pent->plt.offset = (bfd_vma) -1;
9128 if (!doneone)
9129 {
9130 h->plt.plist = NULL;
9131 h->needs_plt = 0;
9132 }
9133 }
9134 else
9135 {
9136 h->plt.plist = NULL;
9137 h->needs_plt = 0;
9138 }
9139
9140 eh = (struct ppc_link_hash_entry *) h;
9141 /* Run through the TLS GD got entries first if we're changing them
9142 to TPREL. */
9143 if ((eh->tls_mask & TLS_TPRELGD) != 0)
9144 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9145 if (gent->got.refcount > 0
9146 && (gent->tls_type & TLS_GD) != 0)
9147 {
9148 /* This was a GD entry that has been converted to TPREL. If
9149 there happens to be a TPREL entry we can use that one. */
9150 struct got_entry *ent;
9151 for (ent = h->got.glist; ent != NULL; ent = ent->next)
9152 if (ent->got.refcount > 0
9153 && (ent->tls_type & TLS_TPREL) != 0
9154 && ent->addend == gent->addend
9155 && ent->owner == gent->owner)
9156 {
9157 gent->got.refcount = 0;
9158 break;
9159 }
9160
9161 /* If not, then we'll be using our own TPREL entry. */
9162 if (gent->got.refcount != 0)
9163 gent->tls_type = TLS_TLS | TLS_TPREL;
9164 }
9165
9166 /* Remove any list entry that won't generate a word in the GOT before
9167 we call merge_got_entries. Otherwise we risk merging to empty
9168 entries. */
9169 pgent = &h->got.glist;
9170 while ((gent = *pgent) != NULL)
9171 if (gent->got.refcount > 0)
9172 {
9173 if ((gent->tls_type & TLS_LD) != 0
9174 && !h->def_dynamic)
9175 {
9176 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
9177 *pgent = gent->next;
9178 }
9179 else
9180 pgent = &gent->next;
9181 }
9182 else
9183 *pgent = gent->next;
9184
9185 if (!htab->do_multi_toc)
9186 merge_got_entries (&h->got.glist);
9187
9188 for (gent = h->got.glist; gent != NULL; gent = gent->next)
9189 if (!gent->is_indirect)
9190 {
9191 /* Make sure this symbol is output as a dynamic symbol.
9192 Undefined weak syms won't yet be marked as dynamic,
9193 nor will all TLS symbols. */
9194 if (h->dynindx == -1
9195 && !h->forced_local
9196 && h->type != STT_GNU_IFUNC
9197 && htab->elf.dynamic_sections_created)
9198 {
9199 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9200 return FALSE;
9201 }
9202
9203 if (!is_ppc64_elf (gent->owner))
9204 abort ();
9205
9206 allocate_got (h, info, gent);
9207 }
9208
9209 if (eh->dyn_relocs == NULL
9210 || (!htab->elf.dynamic_sections_created
9211 && h->type != STT_GNU_IFUNC))
9212 return TRUE;
9213
9214 /* In the shared -Bsymbolic case, discard space allocated for
9215 dynamic pc-relative relocs against symbols which turn out to be
9216 defined in regular objects. For the normal shared case, discard
9217 space for relocs that have become local due to symbol visibility
9218 changes. */
9219
9220 if (info->shared)
9221 {
9222 /* Relocs that use pc_count are those that appear on a call insn,
9223 or certain REL relocs (see must_be_dyn_reloc) that can be
9224 generated via assembly. We want calls to protected symbols to
9225 resolve directly to the function rather than going via the plt.
9226 If people want function pointer comparisons to work as expected
9227 then they should avoid writing weird assembly. */
9228 if (SYMBOL_CALLS_LOCAL (info, h))
9229 {
9230 struct elf_dyn_relocs **pp;
9231
9232 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
9233 {
9234 p->count -= p->pc_count;
9235 p->pc_count = 0;
9236 if (p->count == 0)
9237 *pp = p->next;
9238 else
9239 pp = &p->next;
9240 }
9241 }
9242
9243 /* Also discard relocs on undefined weak syms with non-default
9244 visibility. */
9245 if (eh->dyn_relocs != NULL
9246 && h->root.type == bfd_link_hash_undefweak)
9247 {
9248 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9249 eh->dyn_relocs = NULL;
9250
9251 /* Make sure this symbol is output as a dynamic symbol.
9252 Undefined weak syms won't yet be marked as dynamic. */
9253 else if (h->dynindx == -1
9254 && !h->forced_local)
9255 {
9256 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9257 return FALSE;
9258 }
9259 }
9260 }
9261 else if (h->type == STT_GNU_IFUNC)
9262 {
9263 if (!h->non_got_ref)
9264 eh->dyn_relocs = NULL;
9265 }
9266 else if (ELIMINATE_COPY_RELOCS)
9267 {
9268 /* For the non-shared case, discard space for relocs against
9269 symbols which turn out to need copy relocs or are not
9270 dynamic. */
9271
9272 if (!h->non_got_ref
9273 && !h->def_regular)
9274 {
9275 /* Make sure this symbol is output as a dynamic symbol.
9276 Undefined weak syms won't yet be marked as dynamic. */
9277 if (h->dynindx == -1
9278 && !h->forced_local)
9279 {
9280 if (! bfd_elf_link_record_dynamic_symbol (info, h))
9281 return FALSE;
9282 }
9283
9284 /* If that succeeded, we know we'll be keeping all the
9285 relocs. */
9286 if (h->dynindx != -1)
9287 goto keep;
9288 }
9289
9290 eh->dyn_relocs = NULL;
9291
9292 keep: ;
9293 }
9294
9295 /* Finally, allocate space. */
9296 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9297 {
9298 asection *sreloc = elf_section_data (p->sec)->sreloc;
9299 if (eh->elf.type == STT_GNU_IFUNC)
9300 sreloc = htab->reliplt;
9301 sreloc->size += p->count * sizeof (Elf64_External_Rela);
9302 }
9303
9304 return TRUE;
9305 }
9306
9307 /* Find any dynamic relocs that apply to read-only sections. */
9308
9309 static bfd_boolean
9310 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
9311 {
9312 struct ppc_link_hash_entry *eh;
9313 struct elf_dyn_relocs *p;
9314
9315 eh = (struct ppc_link_hash_entry *) h;
9316 for (p = eh->dyn_relocs; p != NULL; p = p->next)
9317 {
9318 asection *s = p->sec->output_section;
9319
9320 if (s != NULL && (s->flags & SEC_READONLY) != 0)
9321 {
9322 struct bfd_link_info *info = inf;
9323
9324 info->flags |= DF_TEXTREL;
9325
9326 /* Not an error, just cut short the traversal. */
9327 return FALSE;
9328 }
9329 }
9330 return TRUE;
9331 }
9332
9333 /* Set the sizes of the dynamic sections. */
9334
9335 static bfd_boolean
9336 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
9337 struct bfd_link_info *info)
9338 {
9339 struct ppc_link_hash_table *htab;
9340 bfd *dynobj;
9341 asection *s;
9342 bfd_boolean relocs;
9343 bfd *ibfd;
9344 struct got_entry *first_tlsld;
9345
9346 htab = ppc_hash_table (info);
9347 if (htab == NULL)
9348 return FALSE;
9349
9350 dynobj = htab->elf.dynobj;
9351 if (dynobj == NULL)
9352 abort ();
9353
9354 if (htab->elf.dynamic_sections_created)
9355 {
9356 /* Set the contents of the .interp section to the interpreter. */
9357 if (info->executable)
9358 {
9359 s = bfd_get_linker_section (dynobj, ".interp");
9360 if (s == NULL)
9361 abort ();
9362 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
9363 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
9364 }
9365 }
9366
9367 /* Set up .got offsets for local syms, and space for local dynamic
9368 relocs. */
9369 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9370 {
9371 struct got_entry **lgot_ents;
9372 struct got_entry **end_lgot_ents;
9373 struct plt_entry **local_plt;
9374 struct plt_entry **end_local_plt;
9375 unsigned char *lgot_masks;
9376 bfd_size_type locsymcount;
9377 Elf_Internal_Shdr *symtab_hdr;
9378
9379 if (!is_ppc64_elf (ibfd))
9380 continue;
9381
9382 for (s = ibfd->sections; s != NULL; s = s->next)
9383 {
9384 struct ppc_dyn_relocs *p;
9385
9386 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
9387 {
9388 if (!bfd_is_abs_section (p->sec)
9389 && bfd_is_abs_section (p->sec->output_section))
9390 {
9391 /* Input section has been discarded, either because
9392 it is a copy of a linkonce section or due to
9393 linker script /DISCARD/, so we'll be discarding
9394 the relocs too. */
9395 }
9396 else if (p->count != 0)
9397 {
9398 asection *srel = elf_section_data (p->sec)->sreloc;
9399 if (p->ifunc)
9400 srel = htab->reliplt;
9401 srel->size += p->count * sizeof (Elf64_External_Rela);
9402 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
9403 info->flags |= DF_TEXTREL;
9404 }
9405 }
9406 }
9407
9408 lgot_ents = elf_local_got_ents (ibfd);
9409 if (!lgot_ents)
9410 continue;
9411
9412 symtab_hdr = &elf_symtab_hdr (ibfd);
9413 locsymcount = symtab_hdr->sh_info;
9414 end_lgot_ents = lgot_ents + locsymcount;
9415 local_plt = (struct plt_entry **) end_lgot_ents;
9416 end_local_plt = local_plt + locsymcount;
9417 lgot_masks = (unsigned char *) end_local_plt;
9418 s = ppc64_elf_tdata (ibfd)->got;
9419 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
9420 {
9421 struct got_entry **pent, *ent;
9422
9423 pent = lgot_ents;
9424 while ((ent = *pent) != NULL)
9425 if (ent->got.refcount > 0)
9426 {
9427 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
9428 {
9429 ppc64_tlsld_got (ibfd)->got.refcount += 1;
9430 *pent = ent->next;
9431 }
9432 else
9433 {
9434 unsigned int ent_size = 8;
9435 unsigned int rel_size = sizeof (Elf64_External_Rela);
9436
9437 ent->got.offset = s->size;
9438 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
9439 {
9440 ent_size *= 2;
9441 rel_size *= 2;
9442 }
9443 s->size += ent_size;
9444 if ((*lgot_masks & PLT_IFUNC) != 0)
9445 {
9446 htab->reliplt->size += rel_size;
9447 htab->got_reli_size += rel_size;
9448 }
9449 else if (info->shared)
9450 {
9451 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9452 srel->size += rel_size;
9453 }
9454 pent = &ent->next;
9455 }
9456 }
9457 else
9458 *pent = ent->next;
9459 }
9460
9461 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
9462 for (; local_plt < end_local_plt; ++local_plt)
9463 {
9464 struct plt_entry *ent;
9465
9466 for (ent = *local_plt; ent != NULL; ent = ent->next)
9467 if (ent->plt.refcount > 0)
9468 {
9469 s = htab->iplt;
9470 ent->plt.offset = s->size;
9471 s->size += PLT_ENTRY_SIZE;
9472
9473 htab->reliplt->size += sizeof (Elf64_External_Rela);
9474 }
9475 else
9476 ent->plt.offset = (bfd_vma) -1;
9477 }
9478 }
9479
9480 /* Allocate global sym .plt and .got entries, and space for global
9481 sym dynamic relocs. */
9482 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
9483
9484 first_tlsld = NULL;
9485 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9486 {
9487 struct got_entry *ent;
9488
9489 if (!is_ppc64_elf (ibfd))
9490 continue;
9491
9492 ent = ppc64_tlsld_got (ibfd);
9493 if (ent->got.refcount > 0)
9494 {
9495 if (!htab->do_multi_toc && first_tlsld != NULL)
9496 {
9497 ent->is_indirect = TRUE;
9498 ent->got.ent = first_tlsld;
9499 }
9500 else
9501 {
9502 if (first_tlsld == NULL)
9503 first_tlsld = ent;
9504 s = ppc64_elf_tdata (ibfd)->got;
9505 ent->got.offset = s->size;
9506 ent->owner = ibfd;
9507 s->size += 16;
9508 if (info->shared)
9509 {
9510 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9511 srel->size += sizeof (Elf64_External_Rela);
9512 }
9513 }
9514 }
9515 else
9516 ent->got.offset = (bfd_vma) -1;
9517 }
9518
9519 /* We now have determined the sizes of the various dynamic sections.
9520 Allocate memory for them. */
9521 relocs = FALSE;
9522 for (s = dynobj->sections; s != NULL; s = s->next)
9523 {
9524 if ((s->flags & SEC_LINKER_CREATED) == 0)
9525 continue;
9526
9527 if (s == htab->brlt || s == htab->relbrlt)
9528 /* These haven't been allocated yet; don't strip. */
9529 continue;
9530 else if (s == htab->got
9531 || s == htab->plt
9532 || s == htab->iplt
9533 || s == htab->glink
9534 || s == htab->dynbss)
9535 {
9536 /* Strip this section if we don't need it; see the
9537 comment below. */
9538 }
9539 else if (s == htab->glink_eh_frame)
9540 {
9541 if (!bfd_is_abs_section (s->output_section))
9542 /* Not sized yet. */
9543 continue;
9544 }
9545 else if (CONST_STRNEQ (s->name, ".rela"))
9546 {
9547 if (s->size != 0)
9548 {
9549 if (s != htab->relplt)
9550 relocs = TRUE;
9551
9552 /* We use the reloc_count field as a counter if we need
9553 to copy relocs into the output file. */
9554 s->reloc_count = 0;
9555 }
9556 }
9557 else
9558 {
9559 /* It's not one of our sections, so don't allocate space. */
9560 continue;
9561 }
9562
9563 if (s->size == 0)
9564 {
9565 /* If we don't need this section, strip it from the
9566 output file. This is mostly to handle .rela.bss and
9567 .rela.plt. We must create both sections in
9568 create_dynamic_sections, because they must be created
9569 before the linker maps input sections to output
9570 sections. The linker does that before
9571 adjust_dynamic_symbol is called, and it is that
9572 function which decides whether anything needs to go
9573 into these sections. */
9574 s->flags |= SEC_EXCLUDE;
9575 continue;
9576 }
9577
9578 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9579 continue;
9580
9581 /* Allocate memory for the section contents. We use bfd_zalloc
9582 here in case unused entries are not reclaimed before the
9583 section's contents are written out. This should not happen,
9584 but this way if it does we get a R_PPC64_NONE reloc in .rela
9585 sections instead of garbage.
9586 We also rely on the section contents being zero when writing
9587 the GOT. */
9588 s->contents = bfd_zalloc (dynobj, s->size);
9589 if (s->contents == NULL)
9590 return FALSE;
9591 }
9592
9593 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9594 {
9595 if (!is_ppc64_elf (ibfd))
9596 continue;
9597
9598 s = ppc64_elf_tdata (ibfd)->got;
9599 if (s != NULL && s != htab->got)
9600 {
9601 if (s->size == 0)
9602 s->flags |= SEC_EXCLUDE;
9603 else
9604 {
9605 s->contents = bfd_zalloc (ibfd, s->size);
9606 if (s->contents == NULL)
9607 return FALSE;
9608 }
9609 }
9610 s = ppc64_elf_tdata (ibfd)->relgot;
9611 if (s != NULL)
9612 {
9613 if (s->size == 0)
9614 s->flags |= SEC_EXCLUDE;
9615 else
9616 {
9617 s->contents = bfd_zalloc (ibfd, s->size);
9618 if (s->contents == NULL)
9619 return FALSE;
9620 relocs = TRUE;
9621 s->reloc_count = 0;
9622 }
9623 }
9624 }
9625
9626 if (htab->elf.dynamic_sections_created)
9627 {
9628 /* Add some entries to the .dynamic section. We fill in the
9629 values later, in ppc64_elf_finish_dynamic_sections, but we
9630 must add the entries now so that we get the correct size for
9631 the .dynamic section. The DT_DEBUG entry is filled in by the
9632 dynamic linker and used by the debugger. */
9633 #define add_dynamic_entry(TAG, VAL) \
9634 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9635
9636 if (info->executable)
9637 {
9638 if (!add_dynamic_entry (DT_DEBUG, 0))
9639 return FALSE;
9640 }
9641
9642 if (htab->plt != NULL && htab->plt->size != 0)
9643 {
9644 if (!add_dynamic_entry (DT_PLTGOT, 0)
9645 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9646 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9647 || !add_dynamic_entry (DT_JMPREL, 0)
9648 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9649 return FALSE;
9650 }
9651
9652 if (NO_OPD_RELOCS)
9653 {
9654 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9655 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9656 return FALSE;
9657 }
9658
9659 if (!htab->no_tls_get_addr_opt
9660 && htab->tls_get_addr_fd != NULL
9661 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9662 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9663 return FALSE;
9664
9665 if (relocs)
9666 {
9667 if (!add_dynamic_entry (DT_RELA, 0)
9668 || !add_dynamic_entry (DT_RELASZ, 0)
9669 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9670 return FALSE;
9671
9672 /* If any dynamic relocs apply to a read-only section,
9673 then we need a DT_TEXTREL entry. */
9674 if ((info->flags & DF_TEXTREL) == 0)
9675 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9676
9677 if ((info->flags & DF_TEXTREL) != 0)
9678 {
9679 if (!add_dynamic_entry (DT_TEXTREL, 0))
9680 return FALSE;
9681 }
9682 }
9683 }
9684 #undef add_dynamic_entry
9685
9686 return TRUE;
9687 }
9688
9689 /* Determine the type of stub needed, if any, for a call. */
9690
9691 static inline enum ppc_stub_type
9692 ppc_type_of_stub (asection *input_sec,
9693 const Elf_Internal_Rela *rel,
9694 struct ppc_link_hash_entry **hash,
9695 struct plt_entry **plt_ent,
9696 bfd_vma destination)
9697 {
9698 struct ppc_link_hash_entry *h = *hash;
9699 bfd_vma location;
9700 bfd_vma branch_offset;
9701 bfd_vma max_branch_offset;
9702 enum elf_ppc64_reloc_type r_type;
9703
9704 if (h != NULL)
9705 {
9706 struct plt_entry *ent;
9707 struct ppc_link_hash_entry *fdh = h;
9708 if (h->oh != NULL
9709 && h->oh->is_func_descriptor)
9710 {
9711 fdh = ppc_follow_link (h->oh);
9712 *hash = fdh;
9713 }
9714
9715 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9716 if (ent->addend == rel->r_addend
9717 && ent->plt.offset != (bfd_vma) -1)
9718 {
9719 *plt_ent = ent;
9720 return ppc_stub_plt_call;
9721 }
9722
9723 /* Here, we know we don't have a plt entry. If we don't have a
9724 either a defined function descriptor or a defined entry symbol
9725 in a regular object file, then it is pointless trying to make
9726 any other type of stub. */
9727 if (!is_static_defined (&fdh->elf)
9728 && !is_static_defined (&h->elf))
9729 return ppc_stub_none;
9730 }
9731 else if (elf_local_got_ents (input_sec->owner) != NULL)
9732 {
9733 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9734 struct plt_entry **local_plt = (struct plt_entry **)
9735 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9736 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9737
9738 if (local_plt[r_symndx] != NULL)
9739 {
9740 struct plt_entry *ent;
9741
9742 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9743 if (ent->addend == rel->r_addend
9744 && ent->plt.offset != (bfd_vma) -1)
9745 {
9746 *plt_ent = ent;
9747 return ppc_stub_plt_call;
9748 }
9749 }
9750 }
9751
9752 /* Determine where the call point is. */
9753 location = (input_sec->output_offset
9754 + input_sec->output_section->vma
9755 + rel->r_offset);
9756
9757 branch_offset = destination - location;
9758 r_type = ELF64_R_TYPE (rel->r_info);
9759
9760 /* Determine if a long branch stub is needed. */
9761 max_branch_offset = 1 << 25;
9762 if (r_type != R_PPC64_REL24)
9763 max_branch_offset = 1 << 15;
9764
9765 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9766 /* We need a stub. Figure out whether a long_branch or plt_branch
9767 is needed later. */
9768 return ppc_stub_long_branch;
9769
9770 return ppc_stub_none;
9771 }
9772
9773 /* With power7 weakly ordered memory model, it is possible for ld.so
9774 to update a plt entry in one thread and have another thread see a
9775 stale zero toc entry. To avoid this we need some sort of acquire
9776 barrier in the call stub. One solution is to make the load of the
9777 toc word seem to appear to depend on the load of the function entry
9778 word. Another solution is to test for r2 being zero, and branch to
9779 the appropriate glink entry if so.
9780
9781 . fake dep barrier compare
9782 . ld 11,xxx(2) ld 11,xxx(2)
9783 . mtctr 11 mtctr 11
9784 . xor 11,11,11 ld 2,xxx+8(2)
9785 . add 2,2,11 cmpldi 2,0
9786 . ld 2,xxx+8(2) bnectr+
9787 . bctr b <glink_entry>
9788
9789 The solution involving the compare turns out to be faster, so
9790 that's what we use unless the branch won't reach. */
9791
9792 #define ALWAYS_USE_FAKE_DEP 0
9793 #define ALWAYS_EMIT_R2SAVE 0
9794
9795 #define PPC_LO(v) ((v) & 0xffff)
9796 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9797 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9798
9799 static inline unsigned int
9800 plt_stub_size (struct ppc_link_hash_table *htab,
9801 struct ppc_stub_hash_entry *stub_entry,
9802 bfd_vma off)
9803 {
9804 unsigned size = PLT_CALL_STUB_SIZE;
9805
9806 if (!(ALWAYS_EMIT_R2SAVE
9807 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
9808 size -= 4;
9809 if (!htab->plt_static_chain)
9810 size -= 4;
9811 if (htab->plt_thread_safe)
9812 size += 8;
9813 if (PPC_HA (off) == 0)
9814 size -= 4;
9815 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9816 size += 4;
9817 if (stub_entry->h != NULL
9818 && (stub_entry->h == htab->tls_get_addr_fd
9819 || stub_entry->h == htab->tls_get_addr)
9820 && !htab->no_tls_get_addr_opt)
9821 size += 13 * 4;
9822 return size;
9823 }
9824
9825 /* If this stub would cross fewer 2**plt_stub_align boundaries if we align,
9826 then return the padding needed to do so. */
9827 static inline unsigned int
9828 plt_stub_pad (struct ppc_link_hash_table *htab,
9829 struct ppc_stub_hash_entry *stub_entry,
9830 bfd_vma plt_off)
9831 {
9832 int stub_align = 1 << htab->plt_stub_align;
9833 unsigned stub_size = plt_stub_size (htab, stub_entry, plt_off);
9834 bfd_vma stub_off = stub_entry->stub_sec->size;
9835
9836 if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align)
9837 > (stub_size & -stub_align))
9838 return stub_align - (stub_off & (stub_align - 1));
9839 return 0;
9840 }
9841
9842 /* Build a .plt call stub. */
9843
9844 static inline bfd_byte *
9845 build_plt_stub (struct ppc_link_hash_table *htab,
9846 struct ppc_stub_hash_entry *stub_entry,
9847 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
9848 {
9849 bfd *obfd = htab->stub_bfd;
9850 bfd_boolean plt_static_chain = htab->plt_static_chain;
9851 bfd_boolean plt_thread_safe = htab->plt_thread_safe;
9852 bfd_boolean use_fake_dep = plt_thread_safe;
9853 bfd_vma cmp_branch_off = 0;
9854
9855 if (!ALWAYS_USE_FAKE_DEP
9856 && plt_thread_safe
9857 && !(stub_entry->h != NULL
9858 && (stub_entry->h == htab->tls_get_addr_fd
9859 || stub_entry->h == htab->tls_get_addr)
9860 && !htab->no_tls_get_addr_opt))
9861 {
9862 bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1;
9863 bfd_vma pltindex = (pltoff - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
9864 bfd_vma glinkoff = GLINK_CALL_STUB_SIZE + pltindex * 8;
9865 bfd_vma to, from;
9866
9867 if (pltindex > 32768)
9868 glinkoff += (pltindex - 32768) * 4;
9869 to = (glinkoff
9870 + htab->glink->output_offset
9871 + htab->glink->output_section->vma);
9872 from = (p - stub_entry->stub_sec->contents
9873 + 4 * (ALWAYS_EMIT_R2SAVE
9874 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9875 + 4 * (PPC_HA (offset) != 0)
9876 + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain)
9877 != PPC_HA (offset))
9878 + 4 * (plt_static_chain != 0)
9879 + 20
9880 + stub_entry->stub_sec->output_offset
9881 + stub_entry->stub_sec->output_section->vma);
9882 cmp_branch_off = to - from;
9883 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
9884 }
9885
9886 if (PPC_HA (offset) != 0)
9887 {
9888 if (r != NULL)
9889 {
9890 if (ALWAYS_EMIT_R2SAVE
9891 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9892 r[0].r_offset += 4;
9893 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9894 r[1].r_offset = r[0].r_offset + 4;
9895 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9896 r[1].r_addend = r[0].r_addend;
9897 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9898 {
9899 r[2].r_offset = r[1].r_offset + 4;
9900 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9901 r[2].r_addend = r[0].r_addend;
9902 }
9903 else
9904 {
9905 r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep;
9906 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9907 r[2].r_addend = r[0].r_addend + 8;
9908 if (plt_static_chain)
9909 {
9910 r[3].r_offset = r[2].r_offset + 4;
9911 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9912 r[3].r_addend = r[0].r_addend + 16;
9913 }
9914 }
9915 }
9916 if (ALWAYS_EMIT_R2SAVE
9917 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9918 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9919 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9920 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9921 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9922 {
9923 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9924 offset = 0;
9925 }
9926 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9927 if (use_fake_dep)
9928 {
9929 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9930 bfd_put_32 (obfd, ADD_R12_R12_R11, p), p += 4;
9931 }
9932 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9933 if (plt_static_chain)
9934 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9935 }
9936 else
9937 {
9938 if (r != NULL)
9939 {
9940 if (ALWAYS_EMIT_R2SAVE
9941 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9942 r[0].r_offset += 4;
9943 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9944 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9945 {
9946 r[1].r_offset = r[0].r_offset + 4;
9947 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9948 r[1].r_addend = r[0].r_addend;
9949 }
9950 else
9951 {
9952 r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep;
9953 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9954 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9955 if (plt_static_chain)
9956 {
9957 r[2].r_offset = r[1].r_offset + 4;
9958 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9959 r[2].r_addend = r[0].r_addend + 8;
9960 }
9961 }
9962 }
9963 if (ALWAYS_EMIT_R2SAVE
9964 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
9965 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9966 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9967 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9968 {
9969 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9970 offset = 0;
9971 }
9972 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9973 if (use_fake_dep)
9974 {
9975 bfd_put_32 (obfd, XOR_R11_R11_R11, p), p += 4;
9976 bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4;
9977 }
9978 if (plt_static_chain)
9979 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9980 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9981 }
9982 if (plt_thread_safe && !use_fake_dep)
9983 {
9984 bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4;
9985 bfd_put_32 (obfd, BNECTR_P4, p), p += 4;
9986 bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4;
9987 }
9988 else
9989 bfd_put_32 (obfd, BCTR, p), p += 4;
9990 return p;
9991 }
9992
9993 /* Build a special .plt call stub for __tls_get_addr. */
9994
9995 #define LD_R11_0R3 0xe9630000
9996 #define LD_R12_0R3 0xe9830000
9997 #define MR_R0_R3 0x7c601b78
9998 #define CMPDI_R11_0 0x2c2b0000
9999 #define ADD_R3_R12_R13 0x7c6c6a14
10000 #define BEQLR 0x4d820020
10001 #define MR_R3_R0 0x7c030378
10002 #define MFLR_R11 0x7d6802a6
10003 #define STD_R11_0R1 0xf9610000
10004 #define BCTRL 0x4e800421
10005 #define LD_R11_0R1 0xe9610000
10006 #define LD_R2_0R1 0xe8410000
10007 #define MTLR_R11 0x7d6803a6
10008
10009 static inline bfd_byte *
10010 build_tls_get_addr_stub (struct ppc_link_hash_table *htab,
10011 struct ppc_stub_hash_entry *stub_entry,
10012 bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r)
10013 {
10014 bfd *obfd = htab->stub_bfd;
10015
10016 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
10017 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
10018 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
10019 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
10020 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
10021 bfd_put_32 (obfd, BEQLR, p), p += 4;
10022 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
10023 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
10024 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
10025
10026 if (r != NULL)
10027 r[0].r_offset += 9 * 4;
10028 p = build_plt_stub (htab, stub_entry, p, offset, r);
10029 bfd_put_32 (obfd, BCTRL, p - 4);
10030
10031 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
10032 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
10033 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
10034 bfd_put_32 (obfd, BLR, p), p += 4;
10035
10036 return p;
10037 }
10038
10039 static Elf_Internal_Rela *
10040 get_relocs (asection *sec, int count)
10041 {
10042 Elf_Internal_Rela *relocs;
10043 struct bfd_elf_section_data *elfsec_data;
10044
10045 elfsec_data = elf_section_data (sec);
10046 relocs = elfsec_data->relocs;
10047 if (relocs == NULL)
10048 {
10049 bfd_size_type relsize;
10050 relsize = sec->reloc_count * sizeof (*relocs);
10051 relocs = bfd_alloc (sec->owner, relsize);
10052 if (relocs == NULL)
10053 return NULL;
10054 elfsec_data->relocs = relocs;
10055 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
10056 sizeof (Elf_Internal_Shdr));
10057 if (elfsec_data->rela.hdr == NULL)
10058 return NULL;
10059 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
10060 * sizeof (Elf64_External_Rela));
10061 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
10062 sec->reloc_count = 0;
10063 }
10064 relocs += sec->reloc_count;
10065 sec->reloc_count += count;
10066 return relocs;
10067 }
10068
10069 static bfd_vma
10070 get_r2off (struct bfd_link_info *info,
10071 struct ppc_stub_hash_entry *stub_entry)
10072 {
10073 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10074 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
10075
10076 if (r2off == 0)
10077 {
10078 /* Support linking -R objects. Get the toc pointer from the
10079 opd entry. */
10080 char buf[8];
10081 asection *opd = stub_entry->h->elf.root.u.def.section;
10082 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
10083
10084 if (strcmp (opd->name, ".opd") != 0
10085 || opd->reloc_count != 0)
10086 {
10087 info->callbacks->einfo (_("%P: cannot find opd entry toc for `%T'\n"),
10088 stub_entry->h->elf.root.root.string);
10089 bfd_set_error (bfd_error_bad_value);
10090 return 0;
10091 }
10092 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
10093 return 0;
10094 r2off = bfd_get_64 (opd->owner, buf);
10095 r2off -= elf_gp (info->output_bfd);
10096 }
10097 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
10098 return r2off;
10099 }
10100
10101 static bfd_boolean
10102 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10103 {
10104 struct ppc_stub_hash_entry *stub_entry;
10105 struct ppc_branch_hash_entry *br_entry;
10106 struct bfd_link_info *info;
10107 struct ppc_link_hash_table *htab;
10108 bfd_byte *loc;
10109 bfd_byte *p;
10110 bfd_vma dest, off;
10111 int size;
10112 Elf_Internal_Rela *r;
10113 asection *plt;
10114
10115 /* Massage our args to the form they really have. */
10116 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10117 info = in_arg;
10118
10119 htab = ppc_hash_table (info);
10120 if (htab == NULL)
10121 return FALSE;
10122
10123 /* Make a note of the offset within the stubs for this entry. */
10124 stub_entry->stub_offset = stub_entry->stub_sec->size;
10125 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
10126
10127 htab->stub_count[stub_entry->stub_type - 1] += 1;
10128 switch (stub_entry->stub_type)
10129 {
10130 case ppc_stub_long_branch:
10131 case ppc_stub_long_branch_r2off:
10132 /* Branches are relative. This is where we are going to. */
10133 off = dest = (stub_entry->target_value
10134 + stub_entry->target_section->output_offset
10135 + stub_entry->target_section->output_section->vma);
10136
10137 /* And this is where we are coming from. */
10138 off -= (stub_entry->stub_offset
10139 + stub_entry->stub_sec->output_offset
10140 + stub_entry->stub_sec->output_section->vma);
10141
10142 size = 4;
10143 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10144 {
10145 bfd_vma r2off = get_r2off (info, stub_entry);
10146
10147 if (r2off == 0)
10148 {
10149 htab->stub_error = TRUE;
10150 return FALSE;
10151 }
10152 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10153 loc += 4;
10154 size = 12;
10155 if (PPC_HA (r2off) != 0)
10156 {
10157 size = 16;
10158 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10159 loc += 4;
10160 }
10161 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10162 loc += 4;
10163 off -= size - 4;
10164 }
10165 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
10166
10167 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10168 {
10169 info->callbacks->einfo
10170 (_("%P: long branch stub `%s' offset overflow\n"),
10171 stub_entry->root.string);
10172 htab->stub_error = TRUE;
10173 return FALSE;
10174 }
10175
10176 if (info->emitrelocations)
10177 {
10178 r = get_relocs (stub_entry->stub_sec, 1);
10179 if (r == NULL)
10180 return FALSE;
10181 r->r_offset = loc - stub_entry->stub_sec->contents;
10182 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
10183 r->r_addend = dest;
10184 if (stub_entry->h != NULL)
10185 {
10186 struct elf_link_hash_entry **hashes;
10187 unsigned long symndx;
10188 struct ppc_link_hash_entry *h;
10189
10190 hashes = elf_sym_hashes (htab->stub_bfd);
10191 if (hashes == NULL)
10192 {
10193 bfd_size_type hsize;
10194
10195 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
10196 hashes = bfd_zalloc (htab->stub_bfd, hsize);
10197 if (hashes == NULL)
10198 return FALSE;
10199 elf_sym_hashes (htab->stub_bfd) = hashes;
10200 htab->stub_globals = 1;
10201 }
10202 symndx = htab->stub_globals++;
10203 h = stub_entry->h;
10204 hashes[symndx] = &h->elf;
10205 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
10206 if (h->oh != NULL && h->oh->is_func)
10207 h = ppc_follow_link (h->oh);
10208 if (h->elf.root.u.def.section != stub_entry->target_section)
10209 /* H is an opd symbol. The addend must be zero. */
10210 r->r_addend = 0;
10211 else
10212 {
10213 off = (h->elf.root.u.def.value
10214 + h->elf.root.u.def.section->output_offset
10215 + h->elf.root.u.def.section->output_section->vma);
10216 r->r_addend -= off;
10217 }
10218 }
10219 }
10220 break;
10221
10222 case ppc_stub_plt_branch:
10223 case ppc_stub_plt_branch_r2off:
10224 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10225 stub_entry->root.string + 9,
10226 FALSE, FALSE);
10227 if (br_entry == NULL)
10228 {
10229 info->callbacks->einfo (_("%P: can't find branch stub `%s'\n"),
10230 stub_entry->root.string);
10231 htab->stub_error = TRUE;
10232 return FALSE;
10233 }
10234
10235 dest = (stub_entry->target_value
10236 + stub_entry->target_section->output_offset
10237 + stub_entry->target_section->output_section->vma);
10238
10239 bfd_put_64 (htab->brlt->owner, dest,
10240 htab->brlt->contents + br_entry->offset);
10241
10242 if (br_entry->iter == htab->stub_iteration)
10243 {
10244 br_entry->iter = 0;
10245
10246 if (htab->relbrlt != NULL)
10247 {
10248 /* Create a reloc for the branch lookup table entry. */
10249 Elf_Internal_Rela rela;
10250 bfd_byte *rl;
10251
10252 rela.r_offset = (br_entry->offset
10253 + htab->brlt->output_offset
10254 + htab->brlt->output_section->vma);
10255 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10256 rela.r_addend = dest;
10257
10258 rl = htab->relbrlt->contents;
10259 rl += (htab->relbrlt->reloc_count++
10260 * sizeof (Elf64_External_Rela));
10261 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
10262 }
10263 else if (info->emitrelocations)
10264 {
10265 r = get_relocs (htab->brlt, 1);
10266 if (r == NULL)
10267 return FALSE;
10268 /* brlt, being SEC_LINKER_CREATED does not go through the
10269 normal reloc processing. Symbols and offsets are not
10270 translated from input file to output file form, so
10271 set up the offset per the output file. */
10272 r->r_offset = (br_entry->offset
10273 + htab->brlt->output_offset
10274 + htab->brlt->output_section->vma);
10275 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
10276 r->r_addend = dest;
10277 }
10278 }
10279
10280 dest = (br_entry->offset
10281 + htab->brlt->output_offset
10282 + htab->brlt->output_section->vma);
10283
10284 off = (dest
10285 - elf_gp (htab->brlt->output_section->owner)
10286 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10287
10288 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10289 {
10290 info->callbacks->einfo
10291 (_("%P: linkage table error against `%T'\n"),
10292 stub_entry->root.string);
10293 bfd_set_error (bfd_error_bad_value);
10294 htab->stub_error = TRUE;
10295 return FALSE;
10296 }
10297
10298 if (info->emitrelocations)
10299 {
10300 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
10301 if (r == NULL)
10302 return FALSE;
10303 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10304 if (bfd_big_endian (info->output_bfd))
10305 r[0].r_offset += 2;
10306 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
10307 r[0].r_offset += 4;
10308 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
10309 r[0].r_addend = dest;
10310 if (PPC_HA (off) != 0)
10311 {
10312 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
10313 r[1].r_offset = r[0].r_offset + 4;
10314 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
10315 r[1].r_addend = r[0].r_addend;
10316 }
10317 }
10318
10319 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10320 {
10321 if (PPC_HA (off) != 0)
10322 {
10323 size = 16;
10324 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10325 loc += 4;
10326 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10327 }
10328 else
10329 {
10330 size = 12;
10331 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10332 }
10333 }
10334 else
10335 {
10336 bfd_vma r2off = get_r2off (info, stub_entry);
10337
10338 if (r2off == 0)
10339 {
10340 htab->stub_error = TRUE;
10341 return FALSE;
10342 }
10343
10344 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
10345 loc += 4;
10346 size = 20;
10347 if (PPC_HA (off) != 0)
10348 {
10349 size += 4;
10350 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
10351 loc += 4;
10352 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
10353 loc += 4;
10354 }
10355 else
10356 {
10357 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
10358 loc += 4;
10359 }
10360
10361 if (PPC_HA (r2off) != 0)
10362 {
10363 size += 4;
10364 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
10365 loc += 4;
10366 }
10367 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
10368 }
10369 loc += 4;
10370 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
10371 loc += 4;
10372 bfd_put_32 (htab->stub_bfd, BCTR, loc);
10373 break;
10374
10375 case ppc_stub_plt_call:
10376 case ppc_stub_plt_call_r2save:
10377 if (stub_entry->h != NULL
10378 && stub_entry->h->is_func_descriptor
10379 && stub_entry->h->oh != NULL)
10380 {
10381 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
10382
10383 /* If the old-ABI "dot-symbol" is undefined make it weak so
10384 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
10385 FIXME: We used to define the symbol on one of the call
10386 stubs instead, which is why we test symbol section id
10387 against htab->top_id in various places. Likely all
10388 these checks could now disappear. */
10389 if (fh->elf.root.type == bfd_link_hash_undefined)
10390 fh->elf.root.type = bfd_link_hash_undefweak;
10391 /* Stop undo_symbol_twiddle changing it back to undefined. */
10392 fh->was_undefined = 0;
10393 }
10394
10395 /* Now build the stub. */
10396 dest = stub_entry->plt_ent->plt.offset & ~1;
10397 if (dest >= (bfd_vma) -2)
10398 abort ();
10399
10400 plt = htab->plt;
10401 if (!htab->elf.dynamic_sections_created
10402 || stub_entry->h == NULL
10403 || stub_entry->h->elf.dynindx == -1)
10404 plt = htab->iplt;
10405
10406 dest += plt->output_offset + plt->output_section->vma;
10407
10408 if (stub_entry->h == NULL
10409 && (stub_entry->plt_ent->plt.offset & 1) == 0)
10410 {
10411 Elf_Internal_Rela rela;
10412 bfd_byte *rl;
10413
10414 rela.r_offset = dest;
10415 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
10416 rela.r_addend = (stub_entry->target_value
10417 + stub_entry->target_section->output_offset
10418 + stub_entry->target_section->output_section->vma);
10419
10420 rl = (htab->reliplt->contents
10421 + (htab->reliplt->reloc_count++
10422 * sizeof (Elf64_External_Rela)));
10423 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
10424 stub_entry->plt_ent->plt.offset |= 1;
10425 }
10426
10427 off = (dest
10428 - elf_gp (plt->output_section->owner)
10429 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10430
10431 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
10432 {
10433 info->callbacks->einfo
10434 (_("%P: linkage table error against `%T'\n"),
10435 stub_entry->h != NULL
10436 ? stub_entry->h->elf.root.root.string
10437 : "<local sym>");
10438 bfd_set_error (bfd_error_bad_value);
10439 htab->stub_error = TRUE;
10440 return FALSE;
10441 }
10442
10443 if (htab->plt_stub_align != 0)
10444 {
10445 unsigned pad = plt_stub_pad (htab, stub_entry, off);
10446
10447 stub_entry->stub_sec->size += pad;
10448 stub_entry->stub_offset = stub_entry->stub_sec->size;
10449 loc += pad;
10450 }
10451
10452 r = NULL;
10453 if (info->emitrelocations)
10454 {
10455 r = get_relocs (stub_entry->stub_sec,
10456 (2
10457 + (PPC_HA (off) != 0)
10458 + (htab->plt_static_chain
10459 && PPC_HA (off + 16) == PPC_HA (off))));
10460 if (r == NULL)
10461 return FALSE;
10462 r[0].r_offset = loc - stub_entry->stub_sec->contents;
10463 if (bfd_big_endian (info->output_bfd))
10464 r[0].r_offset += 2;
10465 r[0].r_addend = dest;
10466 }
10467 if (stub_entry->h != NULL
10468 && (stub_entry->h == htab->tls_get_addr_fd
10469 || stub_entry->h == htab->tls_get_addr)
10470 && !htab->no_tls_get_addr_opt)
10471 p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r);
10472 else
10473 p = build_plt_stub (htab, stub_entry, loc, off, r);
10474 size = p - loc;
10475 break;
10476
10477 default:
10478 BFD_FAIL ();
10479 return FALSE;
10480 }
10481
10482 stub_entry->stub_sec->size += size;
10483
10484 if (htab->emit_stub_syms)
10485 {
10486 struct elf_link_hash_entry *h;
10487 size_t len1, len2;
10488 char *name;
10489 const char *const stub_str[] = { "long_branch",
10490 "long_branch_r2off",
10491 "plt_branch",
10492 "plt_branch_r2off",
10493 "plt_call",
10494 "plt_call" };
10495
10496 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
10497 len2 = strlen (stub_entry->root.string);
10498 name = bfd_malloc (len1 + len2 + 2);
10499 if (name == NULL)
10500 return FALSE;
10501 memcpy (name, stub_entry->root.string, 9);
10502 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
10503 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
10504 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
10505 if (h == NULL)
10506 return FALSE;
10507 if (h->root.type == bfd_link_hash_new)
10508 {
10509 h->root.type = bfd_link_hash_defined;
10510 h->root.u.def.section = stub_entry->stub_sec;
10511 h->root.u.def.value = stub_entry->stub_offset;
10512 h->ref_regular = 1;
10513 h->def_regular = 1;
10514 h->ref_regular_nonweak = 1;
10515 h->forced_local = 1;
10516 h->non_elf = 0;
10517 }
10518 }
10519
10520 return TRUE;
10521 }
10522
10523 /* As above, but don't actually build the stub. Just bump offset so
10524 we know stub section sizes, and select plt_branch stubs where
10525 long_branch stubs won't do. */
10526
10527 static bfd_boolean
10528 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
10529 {
10530 struct ppc_stub_hash_entry *stub_entry;
10531 struct bfd_link_info *info;
10532 struct ppc_link_hash_table *htab;
10533 bfd_vma off;
10534 int size;
10535
10536 /* Massage our args to the form they really have. */
10537 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
10538 info = in_arg;
10539
10540 htab = ppc_hash_table (info);
10541 if (htab == NULL)
10542 return FALSE;
10543
10544 if (stub_entry->stub_type == ppc_stub_plt_call
10545 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
10546 {
10547 asection *plt;
10548 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
10549 if (off >= (bfd_vma) -2)
10550 abort ();
10551 plt = htab->plt;
10552 if (!htab->elf.dynamic_sections_created
10553 || stub_entry->h == NULL
10554 || stub_entry->h->elf.dynindx == -1)
10555 plt = htab->iplt;
10556 off += (plt->output_offset
10557 + plt->output_section->vma
10558 - elf_gp (plt->output_section->owner)
10559 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10560
10561 size = plt_stub_size (htab, stub_entry, off);
10562 if (htab->plt_stub_align)
10563 size += plt_stub_pad (htab, stub_entry, off);
10564 if (info->emitrelocations)
10565 {
10566 stub_entry->stub_sec->reloc_count
10567 += (2
10568 + (PPC_HA (off) != 0)
10569 + (htab->plt_static_chain
10570 && PPC_HA (off + 16) == PPC_HA (off)));
10571 stub_entry->stub_sec->flags |= SEC_RELOC;
10572 }
10573 }
10574 else
10575 {
10576 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
10577 variants. */
10578 bfd_vma r2off = 0;
10579
10580 off = (stub_entry->target_value
10581 + stub_entry->target_section->output_offset
10582 + stub_entry->target_section->output_section->vma);
10583 off -= (stub_entry->stub_sec->size
10584 + stub_entry->stub_sec->output_offset
10585 + stub_entry->stub_sec->output_section->vma);
10586
10587 /* Reset the stub type from the plt variant in case we now
10588 can reach with a shorter stub. */
10589 if (stub_entry->stub_type >= ppc_stub_plt_branch)
10590 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
10591
10592 size = 4;
10593 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
10594 {
10595 r2off = get_r2off (info, stub_entry);
10596 if (r2off == 0)
10597 {
10598 htab->stub_error = TRUE;
10599 return FALSE;
10600 }
10601 size = 12;
10602 if (PPC_HA (r2off) != 0)
10603 size = 16;
10604 off -= size - 4;
10605 }
10606
10607 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
10608 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
10609 {
10610 struct ppc_branch_hash_entry *br_entry;
10611
10612 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
10613 stub_entry->root.string + 9,
10614 TRUE, FALSE);
10615 if (br_entry == NULL)
10616 {
10617 info->callbacks->einfo (_("%P: can't build branch stub `%s'\n"),
10618 stub_entry->root.string);
10619 htab->stub_error = TRUE;
10620 return FALSE;
10621 }
10622
10623 if (br_entry->iter != htab->stub_iteration)
10624 {
10625 br_entry->iter = htab->stub_iteration;
10626 br_entry->offset = htab->brlt->size;
10627 htab->brlt->size += 8;
10628
10629 if (htab->relbrlt != NULL)
10630 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10631 else if (info->emitrelocations)
10632 {
10633 htab->brlt->reloc_count += 1;
10634 htab->brlt->flags |= SEC_RELOC;
10635 }
10636 }
10637
10638 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10639 off = (br_entry->offset
10640 + htab->brlt->output_offset
10641 + htab->brlt->output_section->vma
10642 - elf_gp (htab->brlt->output_section->owner)
10643 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10644
10645 if (info->emitrelocations)
10646 {
10647 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10648 stub_entry->stub_sec->flags |= SEC_RELOC;
10649 }
10650
10651 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10652 {
10653 size = 12;
10654 if (PPC_HA (off) != 0)
10655 size = 16;
10656 }
10657 else
10658 {
10659 size = 20;
10660 if (PPC_HA (off) != 0)
10661 size += 4;
10662
10663 if (PPC_HA (r2off) != 0)
10664 size += 4;
10665 }
10666 }
10667 else if (info->emitrelocations)
10668 {
10669 stub_entry->stub_sec->reloc_count += 1;
10670 stub_entry->stub_sec->flags |= SEC_RELOC;
10671 }
10672 }
10673
10674 stub_entry->stub_sec->size += size;
10675 return TRUE;
10676 }
10677
10678 /* Set up various things so that we can make a list of input sections
10679 for each output section included in the link. Returns -1 on error,
10680 0 when no stubs will be needed, and 1 on success. */
10681
10682 int
10683 ppc64_elf_setup_section_lists
10684 (struct bfd_link_info *info,
10685 asection *(*add_stub_section) (const char *, asection *),
10686 void (*layout_sections_again) (void))
10687 {
10688 bfd *input_bfd;
10689 int top_id, top_index, id;
10690 asection *section;
10691 asection **input_list;
10692 bfd_size_type amt;
10693 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10694
10695 if (htab == NULL)
10696 return -1;
10697 /* Stash our params away. */
10698 htab->add_stub_section = add_stub_section;
10699 htab->layout_sections_again = layout_sections_again;
10700
10701 /* Find the top input section id. */
10702 for (input_bfd = info->input_bfds, top_id = 3;
10703 input_bfd != NULL;
10704 input_bfd = input_bfd->link_next)
10705 {
10706 for (section = input_bfd->sections;
10707 section != NULL;
10708 section = section->next)
10709 {
10710 if (top_id < section->id)
10711 top_id = section->id;
10712 }
10713 }
10714
10715 htab->top_id = top_id;
10716 amt = sizeof (struct map_stub) * (top_id + 1);
10717 htab->stub_group = bfd_zmalloc (amt);
10718 if (htab->stub_group == NULL)
10719 return -1;
10720
10721 /* Set toc_off for com, und, abs and ind sections. */
10722 for (id = 0; id < 3; id++)
10723 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10724
10725 /* We can't use output_bfd->section_count here to find the top output
10726 section index as some sections may have been removed, and
10727 strip_excluded_output_sections doesn't renumber the indices. */
10728 for (section = info->output_bfd->sections, top_index = 0;
10729 section != NULL;
10730 section = section->next)
10731 {
10732 if (top_index < section->index)
10733 top_index = section->index;
10734 }
10735
10736 htab->top_index = top_index;
10737 amt = sizeof (asection *) * (top_index + 1);
10738 input_list = bfd_zmalloc (amt);
10739 htab->input_list = input_list;
10740 if (input_list == NULL)
10741 return -1;
10742
10743 return 1;
10744 }
10745
10746 /* Set up for first pass at multitoc partitioning. */
10747
10748 void
10749 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10750 {
10751 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10752
10753 htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd);
10754 htab->toc_bfd = NULL;
10755 htab->toc_first_sec = NULL;
10756 }
10757
10758 /* The linker repeatedly calls this function for each TOC input section
10759 and linker generated GOT section. Group input bfds such that the toc
10760 within a group is less than 64k in size. */
10761
10762 bfd_boolean
10763 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10764 {
10765 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10766 bfd_vma addr, off, limit;
10767
10768 if (htab == NULL)
10769 return FALSE;
10770
10771 if (!htab->second_toc_pass)
10772 {
10773 /* Keep track of the first .toc or .got section for this input bfd. */
10774 bfd_boolean new_bfd = htab->toc_bfd != isec->owner;
10775
10776 if (new_bfd)
10777 {
10778 htab->toc_bfd = isec->owner;
10779 htab->toc_first_sec = isec;
10780 }
10781
10782 addr = isec->output_offset + isec->output_section->vma;
10783 off = addr - htab->toc_curr;
10784 limit = 0x80008000;
10785 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10786 limit = 0x10000;
10787 if (off + isec->size > limit)
10788 {
10789 addr = (htab->toc_first_sec->output_offset
10790 + htab->toc_first_sec->output_section->vma);
10791 htab->toc_curr = addr;
10792 }
10793
10794 /* toc_curr is the base address of this toc group. Set elf_gp
10795 for the input section to be the offset relative to the
10796 output toc base plus 0x8000. Making the input elf_gp an
10797 offset allows us to move the toc as a whole without
10798 recalculating input elf_gp. */
10799 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10800 off += TOC_BASE_OFF;
10801
10802 /* Die if someone uses a linker script that doesn't keep input
10803 file .toc and .got together. */
10804 if (new_bfd
10805 && elf_gp (isec->owner) != 0
10806 && elf_gp (isec->owner) != off)
10807 return FALSE;
10808
10809 elf_gp (isec->owner) = off;
10810 return TRUE;
10811 }
10812
10813 /* During the second pass toc_first_sec points to the start of
10814 a toc group, and toc_curr is used to track the old elf_gp.
10815 We use toc_bfd to ensure we only look at each bfd once. */
10816 if (htab->toc_bfd == isec->owner)
10817 return TRUE;
10818 htab->toc_bfd = isec->owner;
10819
10820 if (htab->toc_first_sec == NULL
10821 || htab->toc_curr != elf_gp (isec->owner))
10822 {
10823 htab->toc_curr = elf_gp (isec->owner);
10824 htab->toc_first_sec = isec;
10825 }
10826 addr = (htab->toc_first_sec->output_offset
10827 + htab->toc_first_sec->output_section->vma);
10828 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10829 elf_gp (isec->owner) = off;
10830
10831 return TRUE;
10832 }
10833
10834 /* Called via elf_link_hash_traverse to merge GOT entries for global
10835 symbol H. */
10836
10837 static bfd_boolean
10838 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10839 {
10840 if (h->root.type == bfd_link_hash_indirect)
10841 return TRUE;
10842
10843 merge_got_entries (&h->got.glist);
10844
10845 return TRUE;
10846 }
10847
10848 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10849 symbol H. */
10850
10851 static bfd_boolean
10852 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10853 {
10854 struct got_entry *gent;
10855
10856 if (h->root.type == bfd_link_hash_indirect)
10857 return TRUE;
10858
10859 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10860 if (!gent->is_indirect)
10861 allocate_got (h, (struct bfd_link_info *) inf, gent);
10862 return TRUE;
10863 }
10864
10865 /* Called on the first multitoc pass after the last call to
10866 ppc64_elf_next_toc_section. This function removes duplicate GOT
10867 entries. */
10868
10869 bfd_boolean
10870 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10871 {
10872 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10873 struct bfd *ibfd, *ibfd2;
10874 bfd_boolean done_something;
10875
10876 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10877
10878 if (!htab->do_multi_toc)
10879 return FALSE;
10880
10881 /* Merge global sym got entries within a toc group. */
10882 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10883
10884 /* And tlsld_got. */
10885 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10886 {
10887 struct got_entry *ent, *ent2;
10888
10889 if (!is_ppc64_elf (ibfd))
10890 continue;
10891
10892 ent = ppc64_tlsld_got (ibfd);
10893 if (!ent->is_indirect
10894 && ent->got.offset != (bfd_vma) -1)
10895 {
10896 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10897 {
10898 if (!is_ppc64_elf (ibfd2))
10899 continue;
10900
10901 ent2 = ppc64_tlsld_got (ibfd2);
10902 if (!ent2->is_indirect
10903 && ent2->got.offset != (bfd_vma) -1
10904 && elf_gp (ibfd2) == elf_gp (ibfd))
10905 {
10906 ent2->is_indirect = TRUE;
10907 ent2->got.ent = ent;
10908 }
10909 }
10910 }
10911 }
10912
10913 /* Zap sizes of got sections. */
10914 htab->reliplt->rawsize = htab->reliplt->size;
10915 htab->reliplt->size -= htab->got_reli_size;
10916 htab->got_reli_size = 0;
10917
10918 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10919 {
10920 asection *got, *relgot;
10921
10922 if (!is_ppc64_elf (ibfd))
10923 continue;
10924
10925 got = ppc64_elf_tdata (ibfd)->got;
10926 if (got != NULL)
10927 {
10928 got->rawsize = got->size;
10929 got->size = 0;
10930 relgot = ppc64_elf_tdata (ibfd)->relgot;
10931 relgot->rawsize = relgot->size;
10932 relgot->size = 0;
10933 }
10934 }
10935
10936 /* Now reallocate the got, local syms first. We don't need to
10937 allocate section contents again since we never increase size. */
10938 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10939 {
10940 struct got_entry **lgot_ents;
10941 struct got_entry **end_lgot_ents;
10942 struct plt_entry **local_plt;
10943 struct plt_entry **end_local_plt;
10944 unsigned char *lgot_masks;
10945 bfd_size_type locsymcount;
10946 Elf_Internal_Shdr *symtab_hdr;
10947 asection *s;
10948
10949 if (!is_ppc64_elf (ibfd))
10950 continue;
10951
10952 lgot_ents = elf_local_got_ents (ibfd);
10953 if (!lgot_ents)
10954 continue;
10955
10956 symtab_hdr = &elf_symtab_hdr (ibfd);
10957 locsymcount = symtab_hdr->sh_info;
10958 end_lgot_ents = lgot_ents + locsymcount;
10959 local_plt = (struct plt_entry **) end_lgot_ents;
10960 end_local_plt = local_plt + locsymcount;
10961 lgot_masks = (unsigned char *) end_local_plt;
10962 s = ppc64_elf_tdata (ibfd)->got;
10963 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10964 {
10965 struct got_entry *ent;
10966
10967 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10968 {
10969 unsigned int ent_size = 8;
10970 unsigned int rel_size = sizeof (Elf64_External_Rela);
10971
10972 ent->got.offset = s->size;
10973 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10974 {
10975 ent_size *= 2;
10976 rel_size *= 2;
10977 }
10978 s->size += ent_size;
10979 if ((*lgot_masks & PLT_IFUNC) != 0)
10980 {
10981 htab->reliplt->size += rel_size;
10982 htab->got_reli_size += rel_size;
10983 }
10984 else if (info->shared)
10985 {
10986 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10987 srel->size += rel_size;
10988 }
10989 }
10990 }
10991 }
10992
10993 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10994
10995 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10996 {
10997 struct got_entry *ent;
10998
10999 if (!is_ppc64_elf (ibfd))
11000 continue;
11001
11002 ent = ppc64_tlsld_got (ibfd);
11003 if (!ent->is_indirect
11004 && ent->got.offset != (bfd_vma) -1)
11005 {
11006 asection *s = ppc64_elf_tdata (ibfd)->got;
11007 ent->got.offset = s->size;
11008 s->size += 16;
11009 if (info->shared)
11010 {
11011 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
11012 srel->size += sizeof (Elf64_External_Rela);
11013 }
11014 }
11015 }
11016
11017 done_something = htab->reliplt->rawsize != htab->reliplt->size;
11018 if (!done_something)
11019 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
11020 {
11021 asection *got;
11022
11023 if (!is_ppc64_elf (ibfd))
11024 continue;
11025
11026 got = ppc64_elf_tdata (ibfd)->got;
11027 if (got != NULL)
11028 {
11029 done_something = got->rawsize != got->size;
11030 if (done_something)
11031 break;
11032 }
11033 }
11034
11035 if (done_something)
11036 (*htab->layout_sections_again) ();
11037
11038 /* Set up for second pass over toc sections to recalculate elf_gp
11039 on input sections. */
11040 htab->toc_bfd = NULL;
11041 htab->toc_first_sec = NULL;
11042 htab->second_toc_pass = TRUE;
11043 return done_something;
11044 }
11045
11046 /* Called after second pass of multitoc partitioning. */
11047
11048 void
11049 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
11050 {
11051 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11052
11053 /* After the second pass, toc_curr tracks the TOC offset used
11054 for code sections below in ppc64_elf_next_input_section. */
11055 htab->toc_curr = TOC_BASE_OFF;
11056 }
11057
11058 /* No toc references were found in ISEC. If the code in ISEC makes no
11059 calls, then there's no need to use toc adjusting stubs when branching
11060 into ISEC. Actually, indirect calls from ISEC are OK as they will
11061 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
11062 needed, and 2 if a cyclical call-graph was found but no other reason
11063 for a stub was detected. If called from the top level, a return of
11064 2 means the same as a return of 0. */
11065
11066 static int
11067 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
11068 {
11069 int ret;
11070
11071 /* Mark this section as checked. */
11072 isec->call_check_done = 1;
11073
11074 /* We know none of our code bearing sections will need toc stubs. */
11075 if ((isec->flags & SEC_LINKER_CREATED) != 0)
11076 return 0;
11077
11078 if (isec->size == 0)
11079 return 0;
11080
11081 if (isec->output_section == NULL)
11082 return 0;
11083
11084 ret = 0;
11085 if (isec->reloc_count != 0)
11086 {
11087 Elf_Internal_Rela *relstart, *rel;
11088 Elf_Internal_Sym *local_syms;
11089 struct ppc_link_hash_table *htab;
11090
11091 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
11092 info->keep_memory);
11093 if (relstart == NULL)
11094 return -1;
11095
11096 /* Look for branches to outside of this section. */
11097 local_syms = NULL;
11098 htab = ppc_hash_table (info);
11099 if (htab == NULL)
11100 return -1;
11101
11102 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
11103 {
11104 enum elf_ppc64_reloc_type r_type;
11105 unsigned long r_symndx;
11106 struct elf_link_hash_entry *h;
11107 struct ppc_link_hash_entry *eh;
11108 Elf_Internal_Sym *sym;
11109 asection *sym_sec;
11110 struct _opd_sec_data *opd;
11111 bfd_vma sym_value;
11112 bfd_vma dest;
11113
11114 r_type = ELF64_R_TYPE (rel->r_info);
11115 if (r_type != R_PPC64_REL24
11116 && r_type != R_PPC64_REL14
11117 && r_type != R_PPC64_REL14_BRTAKEN
11118 && r_type != R_PPC64_REL14_BRNTAKEN)
11119 continue;
11120
11121 r_symndx = ELF64_R_SYM (rel->r_info);
11122 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
11123 isec->owner))
11124 {
11125 ret = -1;
11126 break;
11127 }
11128
11129 /* Calls to dynamic lib functions go through a plt call stub
11130 that uses r2. */
11131 eh = (struct ppc_link_hash_entry *) h;
11132 if (eh != NULL
11133 && (eh->elf.plt.plist != NULL
11134 || (eh->oh != NULL
11135 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
11136 {
11137 ret = 1;
11138 break;
11139 }
11140
11141 if (sym_sec == NULL)
11142 /* Ignore other undefined symbols. */
11143 continue;
11144
11145 /* Assume branches to other sections not included in the
11146 link need stubs too, to cover -R and absolute syms. */
11147 if (sym_sec->output_section == NULL)
11148 {
11149 ret = 1;
11150 break;
11151 }
11152
11153 if (h == NULL)
11154 sym_value = sym->st_value;
11155 else
11156 {
11157 if (h->root.type != bfd_link_hash_defined
11158 && h->root.type != bfd_link_hash_defweak)
11159 abort ();
11160 sym_value = h->root.u.def.value;
11161 }
11162 sym_value += rel->r_addend;
11163
11164 /* If this branch reloc uses an opd sym, find the code section. */
11165 opd = get_opd_info (sym_sec);
11166 if (opd != NULL)
11167 {
11168 if (h == NULL && opd->adjust != NULL)
11169 {
11170 long adjust;
11171
11172 adjust = opd->adjust[sym->st_value / 8];
11173 if (adjust == -1)
11174 /* Assume deleted functions won't ever be called. */
11175 continue;
11176 sym_value += adjust;
11177 }
11178
11179 dest = opd_entry_value (sym_sec, sym_value,
11180 &sym_sec, NULL, FALSE);
11181 if (dest == (bfd_vma) -1)
11182 continue;
11183 }
11184 else
11185 dest = (sym_value
11186 + sym_sec->output_offset
11187 + sym_sec->output_section->vma);
11188
11189 /* Ignore branch to self. */
11190 if (sym_sec == isec)
11191 continue;
11192
11193 /* If the called function uses the toc, we need a stub. */
11194 if (sym_sec->has_toc_reloc
11195 || sym_sec->makes_toc_func_call)
11196 {
11197 ret = 1;
11198 break;
11199 }
11200
11201 /* Assume any branch that needs a long branch stub might in fact
11202 need a plt_branch stub. A plt_branch stub uses r2. */
11203 else if (dest - (isec->output_offset
11204 + isec->output_section->vma
11205 + rel->r_offset) + (1 << 25) >= (2 << 25))
11206 {
11207 ret = 1;
11208 break;
11209 }
11210
11211 /* If calling back to a section in the process of being
11212 tested, we can't say for sure that no toc adjusting stubs
11213 are needed, so don't return zero. */
11214 else if (sym_sec->call_check_in_progress)
11215 ret = 2;
11216
11217 /* Branches to another section that itself doesn't have any TOC
11218 references are OK. Recursively call ourselves to check. */
11219 else if (!sym_sec->call_check_done)
11220 {
11221 int recur;
11222
11223 /* Mark current section as indeterminate, so that other
11224 sections that call back to current won't be marked as
11225 known. */
11226 isec->call_check_in_progress = 1;
11227 recur = toc_adjusting_stub_needed (info, sym_sec);
11228 isec->call_check_in_progress = 0;
11229
11230 if (recur != 0)
11231 {
11232 ret = recur;
11233 if (recur != 2)
11234 break;
11235 }
11236 }
11237 }
11238
11239 if (local_syms != NULL
11240 && (elf_symtab_hdr (isec->owner).contents
11241 != (unsigned char *) local_syms))
11242 free (local_syms);
11243 if (elf_section_data (isec)->relocs != relstart)
11244 free (relstart);
11245 }
11246
11247 if ((ret & 1) == 0
11248 && isec->map_head.s != NULL
11249 && (strcmp (isec->output_section->name, ".init") == 0
11250 || strcmp (isec->output_section->name, ".fini") == 0))
11251 {
11252 if (isec->map_head.s->has_toc_reloc
11253 || isec->map_head.s->makes_toc_func_call)
11254 ret = 1;
11255 else if (!isec->map_head.s->call_check_done)
11256 {
11257 int recur;
11258 isec->call_check_in_progress = 1;
11259 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
11260 isec->call_check_in_progress = 0;
11261 if (recur != 0)
11262 ret = recur;
11263 }
11264 }
11265
11266 if (ret == 1)
11267 isec->makes_toc_func_call = 1;
11268
11269 return ret;
11270 }
11271
11272 /* The linker repeatedly calls this function for each input section,
11273 in the order that input sections are linked into output sections.
11274 Build lists of input sections to determine groupings between which
11275 we may insert linker stubs. */
11276
11277 bfd_boolean
11278 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
11279 {
11280 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11281
11282 if (htab == NULL)
11283 return FALSE;
11284
11285 if ((isec->output_section->flags & SEC_CODE) != 0
11286 && isec->output_section->index <= htab->top_index)
11287 {
11288 asection **list = htab->input_list + isec->output_section->index;
11289 /* Steal the link_sec pointer for our list. */
11290 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
11291 /* This happens to make the list in reverse order,
11292 which is what we want. */
11293 PREV_SEC (isec) = *list;
11294 *list = isec;
11295 }
11296
11297 if (htab->multi_toc_needed)
11298 {
11299 /* If a code section has a function that uses the TOC then we need
11300 to use the right TOC (obviously). Also, make sure that .opd gets
11301 the correct TOC value for R_PPC64_TOC relocs that don't have or
11302 can't find their function symbol (shouldn't ever happen now).
11303 Also specially treat .fixup for the linux kernel. .fixup
11304 contains branches, but only back to the function that hit an
11305 exception. */
11306 if (isec->has_toc_reloc
11307 || (isec->flags & SEC_CODE) == 0
11308 || strcmp (isec->name, ".fixup") == 0)
11309 {
11310 if (elf_gp (isec->owner) != 0)
11311 htab->toc_curr = elf_gp (isec->owner);
11312 }
11313 else
11314 {
11315 if (!isec->call_check_done
11316 && toc_adjusting_stub_needed (info, isec) < 0)
11317 return FALSE;
11318 /* If we make a local call from this section, ie. a branch
11319 without a following nop, then we have no place to put a
11320 toc restoring insn. We must use the same toc group as
11321 the callee.
11322 Testing makes_toc_func_call actually tests for *any*
11323 calls to functions that need a good toc pointer. A more
11324 precise test would be better, as this one will set
11325 incorrect values for pasted .init/.fini fragments.
11326 (Fixed later in check_pasted_section.) */
11327 if (isec->makes_toc_func_call
11328 && elf_gp (isec->owner) != 0)
11329 htab->toc_curr = elf_gp (isec->owner);
11330 }
11331 }
11332
11333 /* Functions that don't use the TOC can belong in any TOC group.
11334 Use the last TOC base. */
11335 htab->stub_group[isec->id].toc_off = htab->toc_curr;
11336 return TRUE;
11337 }
11338
11339 /* Check that all .init and .fini sections use the same toc, if they
11340 have toc relocs. */
11341
11342 static bfd_boolean
11343 check_pasted_section (struct bfd_link_info *info, const char *name)
11344 {
11345 asection *o = bfd_get_section_by_name (info->output_bfd, name);
11346
11347 if (o != NULL)
11348 {
11349 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11350 bfd_vma toc_off = 0;
11351 asection *i;
11352
11353 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11354 if (i->has_toc_reloc)
11355 {
11356 if (toc_off == 0)
11357 toc_off = htab->stub_group[i->id].toc_off;
11358 else if (toc_off != htab->stub_group[i->id].toc_off)
11359 return FALSE;
11360 }
11361
11362 if (toc_off == 0)
11363 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11364 if (i->makes_toc_func_call)
11365 {
11366 toc_off = htab->stub_group[i->id].toc_off;
11367 break;
11368 }
11369
11370 /* Make sure the whole pasted function uses the same toc offset. */
11371 if (toc_off != 0)
11372 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
11373 htab->stub_group[i->id].toc_off = toc_off;
11374 }
11375 return TRUE;
11376 }
11377
11378 bfd_boolean
11379 ppc64_elf_check_init_fini (struct bfd_link_info *info)
11380 {
11381 return (check_pasted_section (info, ".init")
11382 & check_pasted_section (info, ".fini"));
11383 }
11384
11385 /* See whether we can group stub sections together. Grouping stub
11386 sections may result in fewer stubs. More importantly, we need to
11387 put all .init* and .fini* stubs at the beginning of the .init or
11388 .fini output sections respectively, because glibc splits the
11389 _init and _fini functions into multiple parts. Putting a stub in
11390 the middle of a function is not a good idea. */
11391
11392 static void
11393 group_sections (struct ppc_link_hash_table *htab,
11394 bfd_size_type stub_group_size,
11395 bfd_boolean stubs_always_before_branch)
11396 {
11397 asection **list;
11398 bfd_size_type stub14_group_size;
11399 bfd_boolean suppress_size_errors;
11400
11401 suppress_size_errors = FALSE;
11402 stub14_group_size = stub_group_size;
11403 if (stub_group_size == 1)
11404 {
11405 /* Default values. */
11406 if (stubs_always_before_branch)
11407 {
11408 stub_group_size = 0x1e00000;
11409 stub14_group_size = 0x7800;
11410 }
11411 else
11412 {
11413 stub_group_size = 0x1c00000;
11414 stub14_group_size = 0x7000;
11415 }
11416 suppress_size_errors = TRUE;
11417 }
11418
11419 list = htab->input_list + htab->top_index;
11420 do
11421 {
11422 asection *tail = *list;
11423 while (tail != NULL)
11424 {
11425 asection *curr;
11426 asection *prev;
11427 bfd_size_type total;
11428 bfd_boolean big_sec;
11429 bfd_vma curr_toc;
11430
11431 curr = tail;
11432 total = tail->size;
11433 big_sec = total > (ppc64_elf_section_data (tail) != NULL
11434 && ppc64_elf_section_data (tail)->has_14bit_branch
11435 ? stub14_group_size : stub_group_size);
11436 if (big_sec && !suppress_size_errors)
11437 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
11438 tail->owner, tail);
11439 curr_toc = htab->stub_group[tail->id].toc_off;
11440
11441 while ((prev = PREV_SEC (curr)) != NULL
11442 && ((total += curr->output_offset - prev->output_offset)
11443 < (ppc64_elf_section_data (prev) != NULL
11444 && ppc64_elf_section_data (prev)->has_14bit_branch
11445 ? stub14_group_size : stub_group_size))
11446 && htab->stub_group[prev->id].toc_off == curr_toc)
11447 curr = prev;
11448
11449 /* OK, the size from the start of CURR to the end is less
11450 than stub_group_size and thus can be handled by one stub
11451 section. (or the tail section is itself larger than
11452 stub_group_size, in which case we may be toast.) We
11453 should really be keeping track of the total size of stubs
11454 added here, as stubs contribute to the final output
11455 section size. That's a little tricky, and this way will
11456 only break if stubs added make the total size more than
11457 2^25, ie. for the default stub_group_size, if stubs total
11458 more than 2097152 bytes, or nearly 75000 plt call stubs. */
11459 do
11460 {
11461 prev = PREV_SEC (tail);
11462 /* Set up this stub group. */
11463 htab->stub_group[tail->id].link_sec = curr;
11464 }
11465 while (tail != curr && (tail = prev) != NULL);
11466
11467 /* But wait, there's more! Input sections up to stub_group_size
11468 bytes before the stub section can be handled by it too.
11469 Don't do this if we have a really large section after the
11470 stubs, as adding more stubs increases the chance that
11471 branches may not reach into the stub section. */
11472 if (!stubs_always_before_branch && !big_sec)
11473 {
11474 total = 0;
11475 while (prev != NULL
11476 && ((total += tail->output_offset - prev->output_offset)
11477 < (ppc64_elf_section_data (prev) != NULL
11478 && ppc64_elf_section_data (prev)->has_14bit_branch
11479 ? stub14_group_size : stub_group_size))
11480 && htab->stub_group[prev->id].toc_off == curr_toc)
11481 {
11482 tail = prev;
11483 prev = PREV_SEC (tail);
11484 htab->stub_group[tail->id].link_sec = curr;
11485 }
11486 }
11487 tail = prev;
11488 }
11489 }
11490 while (list-- != htab->input_list);
11491 free (htab->input_list);
11492 #undef PREV_SEC
11493 }
11494
11495 static const unsigned char glink_eh_frame_cie[] =
11496 {
11497 0, 0, 0, 16, /* length. */
11498 0, 0, 0, 0, /* id. */
11499 1, /* CIE version. */
11500 'z', 'R', 0, /* Augmentation string. */
11501 4, /* Code alignment. */
11502 0x78, /* Data alignment. */
11503 65, /* RA reg. */
11504 1, /* Augmentation size. */
11505 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
11506 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
11507 };
11508
11509 /* Stripping output sections is normally done before dynamic section
11510 symbols have been allocated. This function is called later, and
11511 handles cases like htab->brlt which is mapped to its own output
11512 section. */
11513
11514 static void
11515 maybe_strip_output (struct bfd_link_info *info, asection *isec)
11516 {
11517 if (isec->size == 0
11518 && isec->output_section->size == 0
11519 && !(isec->output_section->flags & SEC_KEEP)
11520 && !bfd_section_removed_from_list (info->output_bfd,
11521 isec->output_section)
11522 && elf_section_data (isec->output_section)->dynindx == 0)
11523 {
11524 isec->output_section->flags |= SEC_EXCLUDE;
11525 bfd_section_list_remove (info->output_bfd, isec->output_section);
11526 info->output_bfd->section_count--;
11527 }
11528 }
11529
11530 /* Determine and set the size of the stub section for a final link.
11531
11532 The basic idea here is to examine all the relocations looking for
11533 PC-relative calls to a target that is unreachable with a "bl"
11534 instruction. */
11535
11536 bfd_boolean
11537 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
11538 bfd_boolean plt_static_chain, int plt_thread_safe,
11539 int plt_stub_align)
11540 {
11541 bfd_size_type stub_group_size;
11542 bfd_boolean stubs_always_before_branch;
11543 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11544
11545 if (htab == NULL)
11546 return FALSE;
11547
11548 htab->plt_static_chain = plt_static_chain;
11549 htab->plt_stub_align = plt_stub_align;
11550 if (plt_thread_safe == -1 && !info->executable)
11551 plt_thread_safe = 1;
11552 if (plt_thread_safe == -1)
11553 {
11554 static const char *const thread_starter[] =
11555 {
11556 "pthread_create",
11557 /* libstdc++ */
11558 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
11559 /* librt */
11560 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
11561 "mq_notify", "create_timer",
11562 /* libanl */
11563 "getaddrinfo_a",
11564 /* libgomp */
11565 "GOMP_parallel_start",
11566 "GOMP_parallel_loop_static_start",
11567 "GOMP_parallel_loop_dynamic_start",
11568 "GOMP_parallel_loop_guided_start",
11569 "GOMP_parallel_loop_runtime_start",
11570 "GOMP_parallel_sections_start",
11571 };
11572 unsigned i;
11573
11574 for (i = 0; i < sizeof (thread_starter)/ sizeof (thread_starter[0]); i++)
11575 {
11576 struct elf_link_hash_entry *h;
11577 h = elf_link_hash_lookup (&htab->elf, thread_starter[i],
11578 FALSE, FALSE, TRUE);
11579 plt_thread_safe = h != NULL && h->ref_regular;
11580 if (plt_thread_safe)
11581 break;
11582 }
11583 }
11584 htab->plt_thread_safe = plt_thread_safe;
11585 stubs_always_before_branch = group_size < 0;
11586 if (group_size < 0)
11587 stub_group_size = -group_size;
11588 else
11589 stub_group_size = group_size;
11590
11591 group_sections (htab, stub_group_size, stubs_always_before_branch);
11592
11593 while (1)
11594 {
11595 bfd *input_bfd;
11596 unsigned int bfd_indx;
11597 asection *stub_sec;
11598
11599 htab->stub_iteration += 1;
11600
11601 for (input_bfd = info->input_bfds, bfd_indx = 0;
11602 input_bfd != NULL;
11603 input_bfd = input_bfd->link_next, bfd_indx++)
11604 {
11605 Elf_Internal_Shdr *symtab_hdr;
11606 asection *section;
11607 Elf_Internal_Sym *local_syms = NULL;
11608
11609 if (!is_ppc64_elf (input_bfd))
11610 continue;
11611
11612 /* We'll need the symbol table in a second. */
11613 symtab_hdr = &elf_symtab_hdr (input_bfd);
11614 if (symtab_hdr->sh_info == 0)
11615 continue;
11616
11617 /* Walk over each section attached to the input bfd. */
11618 for (section = input_bfd->sections;
11619 section != NULL;
11620 section = section->next)
11621 {
11622 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
11623
11624 /* If there aren't any relocs, then there's nothing more
11625 to do. */
11626 if ((section->flags & SEC_RELOC) == 0
11627 || (section->flags & SEC_ALLOC) == 0
11628 || (section->flags & SEC_LOAD) == 0
11629 || (section->flags & SEC_CODE) == 0
11630 || section->reloc_count == 0)
11631 continue;
11632
11633 /* If this section is a link-once section that will be
11634 discarded, then don't create any stubs. */
11635 if (section->output_section == NULL
11636 || section->output_section->owner != info->output_bfd)
11637 continue;
11638
11639 /* Get the relocs. */
11640 internal_relocs
11641 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
11642 info->keep_memory);
11643 if (internal_relocs == NULL)
11644 goto error_ret_free_local;
11645
11646 /* Now examine each relocation. */
11647 irela = internal_relocs;
11648 irelaend = irela + section->reloc_count;
11649 for (; irela < irelaend; irela++)
11650 {
11651 enum elf_ppc64_reloc_type r_type;
11652 unsigned int r_indx;
11653 enum ppc_stub_type stub_type;
11654 struct ppc_stub_hash_entry *stub_entry;
11655 asection *sym_sec, *code_sec;
11656 bfd_vma sym_value, code_value;
11657 bfd_vma destination;
11658 bfd_boolean ok_dest;
11659 struct ppc_link_hash_entry *hash;
11660 struct ppc_link_hash_entry *fdh;
11661 struct elf_link_hash_entry *h;
11662 Elf_Internal_Sym *sym;
11663 char *stub_name;
11664 const asection *id_sec;
11665 struct _opd_sec_data *opd;
11666 struct plt_entry *plt_ent;
11667
11668 r_type = ELF64_R_TYPE (irela->r_info);
11669 r_indx = ELF64_R_SYM (irela->r_info);
11670
11671 if (r_type >= R_PPC64_max)
11672 {
11673 bfd_set_error (bfd_error_bad_value);
11674 goto error_ret_free_internal;
11675 }
11676
11677 /* Only look for stubs on branch instructions. */
11678 if (r_type != R_PPC64_REL24
11679 && r_type != R_PPC64_REL14
11680 && r_type != R_PPC64_REL14_BRTAKEN
11681 && r_type != R_PPC64_REL14_BRNTAKEN)
11682 continue;
11683
11684 /* Now determine the call target, its name, value,
11685 section. */
11686 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11687 r_indx, input_bfd))
11688 goto error_ret_free_internal;
11689 hash = (struct ppc_link_hash_entry *) h;
11690
11691 ok_dest = FALSE;
11692 fdh = NULL;
11693 sym_value = 0;
11694 if (hash == NULL)
11695 {
11696 sym_value = sym->st_value;
11697 ok_dest = TRUE;
11698 }
11699 else if (hash->elf.root.type == bfd_link_hash_defined
11700 || hash->elf.root.type == bfd_link_hash_defweak)
11701 {
11702 sym_value = hash->elf.root.u.def.value;
11703 if (sym_sec->output_section != NULL)
11704 ok_dest = TRUE;
11705 }
11706 else if (hash->elf.root.type == bfd_link_hash_undefweak
11707 || hash->elf.root.type == bfd_link_hash_undefined)
11708 {
11709 /* Recognise an old ABI func code entry sym, and
11710 use the func descriptor sym instead if it is
11711 defined. */
11712 if (hash->elf.root.root.string[0] == '.'
11713 && (fdh = lookup_fdh (hash, htab)) != NULL)
11714 {
11715 if (fdh->elf.root.type == bfd_link_hash_defined
11716 || fdh->elf.root.type == bfd_link_hash_defweak)
11717 {
11718 sym_sec = fdh->elf.root.u.def.section;
11719 sym_value = fdh->elf.root.u.def.value;
11720 if (sym_sec->output_section != NULL)
11721 ok_dest = TRUE;
11722 }
11723 else
11724 fdh = NULL;
11725 }
11726 }
11727 else
11728 {
11729 bfd_set_error (bfd_error_bad_value);
11730 goto error_ret_free_internal;
11731 }
11732
11733 destination = 0;
11734 if (ok_dest)
11735 {
11736 sym_value += irela->r_addend;
11737 destination = (sym_value
11738 + sym_sec->output_offset
11739 + sym_sec->output_section->vma);
11740 }
11741
11742 code_sec = sym_sec;
11743 code_value = sym_value;
11744 opd = get_opd_info (sym_sec);
11745 if (opd != NULL)
11746 {
11747 bfd_vma dest;
11748
11749 if (hash == NULL && opd->adjust != NULL)
11750 {
11751 long adjust = opd->adjust[sym_value / 8];
11752 if (adjust == -1)
11753 continue;
11754 code_value += adjust;
11755 sym_value += adjust;
11756 }
11757 dest = opd_entry_value (sym_sec, sym_value,
11758 &code_sec, &code_value, FALSE);
11759 if (dest != (bfd_vma) -1)
11760 {
11761 destination = dest;
11762 if (fdh != NULL)
11763 {
11764 /* Fixup old ABI sym to point at code
11765 entry. */
11766 hash->elf.root.type = bfd_link_hash_defweak;
11767 hash->elf.root.u.def.section = code_sec;
11768 hash->elf.root.u.def.value = code_value;
11769 }
11770 }
11771 }
11772
11773 /* Determine what (if any) linker stub is needed. */
11774 plt_ent = NULL;
11775 stub_type = ppc_type_of_stub (section, irela, &hash,
11776 &plt_ent, destination);
11777
11778 if (stub_type != ppc_stub_plt_call)
11779 {
11780 /* Check whether we need a TOC adjusting stub.
11781 Since the linker pastes together pieces from
11782 different object files when creating the
11783 _init and _fini functions, it may be that a
11784 call to what looks like a local sym is in
11785 fact a call needing a TOC adjustment. */
11786 if (code_sec != NULL
11787 && code_sec->output_section != NULL
11788 && (htab->stub_group[code_sec->id].toc_off
11789 != htab->stub_group[section->id].toc_off)
11790 && (code_sec->has_toc_reloc
11791 || code_sec->makes_toc_func_call))
11792 stub_type = ppc_stub_long_branch_r2off;
11793 }
11794
11795 if (stub_type == ppc_stub_none)
11796 continue;
11797
11798 /* __tls_get_addr calls might be eliminated. */
11799 if (stub_type != ppc_stub_plt_call
11800 && hash != NULL
11801 && (hash == htab->tls_get_addr
11802 || hash == htab->tls_get_addr_fd)
11803 && section->has_tls_reloc
11804 && irela != internal_relocs)
11805 {
11806 /* Get tls info. */
11807 unsigned char *tls_mask;
11808
11809 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11810 irela - 1, input_bfd))
11811 goto error_ret_free_internal;
11812 if (*tls_mask != 0)
11813 continue;
11814 }
11815
11816 if (stub_type == ppc_stub_plt_call
11817 && irela + 1 < irelaend
11818 && irela[1].r_offset == irela->r_offset + 4
11819 && ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
11820 {
11821 if (!tocsave_find (htab, INSERT,
11822 &local_syms, irela + 1, input_bfd))
11823 goto error_ret_free_internal;
11824 }
11825 else if (stub_type == ppc_stub_plt_call)
11826 stub_type = ppc_stub_plt_call_r2save;
11827
11828 /* Support for grouping stub sections. */
11829 id_sec = htab->stub_group[section->id].link_sec;
11830
11831 /* Get the name of this stub. */
11832 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11833 if (!stub_name)
11834 goto error_ret_free_internal;
11835
11836 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11837 stub_name, FALSE, FALSE);
11838 if (stub_entry != NULL)
11839 {
11840 /* The proper stub has already been created. */
11841 free (stub_name);
11842 if (stub_type == ppc_stub_plt_call_r2save)
11843 stub_entry->stub_type = stub_type;
11844 continue;
11845 }
11846
11847 stub_entry = ppc_add_stub (stub_name, section, info);
11848 if (stub_entry == NULL)
11849 {
11850 free (stub_name);
11851 error_ret_free_internal:
11852 if (elf_section_data (section)->relocs == NULL)
11853 free (internal_relocs);
11854 error_ret_free_local:
11855 if (local_syms != NULL
11856 && (symtab_hdr->contents
11857 != (unsigned char *) local_syms))
11858 free (local_syms);
11859 return FALSE;
11860 }
11861
11862 stub_entry->stub_type = stub_type;
11863 if (stub_type != ppc_stub_plt_call
11864 && stub_type != ppc_stub_plt_call_r2save)
11865 {
11866 stub_entry->target_value = code_value;
11867 stub_entry->target_section = code_sec;
11868 }
11869 else
11870 {
11871 stub_entry->target_value = sym_value;
11872 stub_entry->target_section = sym_sec;
11873 }
11874 stub_entry->h = hash;
11875 stub_entry->plt_ent = plt_ent;
11876
11877 if (stub_entry->h != NULL)
11878 htab->stub_globals += 1;
11879 }
11880
11881 /* We're done with the internal relocs, free them. */
11882 if (elf_section_data (section)->relocs != internal_relocs)
11883 free (internal_relocs);
11884 }
11885
11886 if (local_syms != NULL
11887 && symtab_hdr->contents != (unsigned char *) local_syms)
11888 {
11889 if (!info->keep_memory)
11890 free (local_syms);
11891 else
11892 symtab_hdr->contents = (unsigned char *) local_syms;
11893 }
11894 }
11895
11896 /* We may have added some stubs. Find out the new size of the
11897 stub sections. */
11898 for (stub_sec = htab->stub_bfd->sections;
11899 stub_sec != NULL;
11900 stub_sec = stub_sec->next)
11901 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11902 {
11903 stub_sec->rawsize = stub_sec->size;
11904 stub_sec->size = 0;
11905 stub_sec->reloc_count = 0;
11906 stub_sec->flags &= ~SEC_RELOC;
11907 }
11908
11909 htab->brlt->size = 0;
11910 htab->brlt->reloc_count = 0;
11911 htab->brlt->flags &= ~SEC_RELOC;
11912 if (htab->relbrlt != NULL)
11913 htab->relbrlt->size = 0;
11914
11915 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11916
11917 if (info->emitrelocations
11918 && htab->glink != NULL && htab->glink->size != 0)
11919 {
11920 htab->glink->reloc_count = 1;
11921 htab->glink->flags |= SEC_RELOC;
11922 }
11923
11924 if (htab->glink_eh_frame != NULL
11925 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11926 && htab->glink_eh_frame->output_section->size != 0)
11927 {
11928 size_t size = 0, align;
11929
11930 for (stub_sec = htab->stub_bfd->sections;
11931 stub_sec != NULL;
11932 stub_sec = stub_sec->next)
11933 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11934 size += 20;
11935 if (htab->glink != NULL && htab->glink->size != 0)
11936 size += 24;
11937 if (size != 0)
11938 size += sizeof (glink_eh_frame_cie);
11939 align = 1;
11940 align <<= htab->glink_eh_frame->output_section->alignment_power;
11941 align -= 1;
11942 size = (size + align) & ~align;
11943 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11944 htab->glink_eh_frame->size = size;
11945 }
11946
11947 if (htab->plt_stub_align != 0)
11948 for (stub_sec = htab->stub_bfd->sections;
11949 stub_sec != NULL;
11950 stub_sec = stub_sec->next)
11951 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11952 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
11953 & (-1 << htab->plt_stub_align));
11954
11955 for (stub_sec = htab->stub_bfd->sections;
11956 stub_sec != NULL;
11957 stub_sec = stub_sec->next)
11958 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11959 && stub_sec->rawsize != stub_sec->size)
11960 break;
11961
11962 /* Exit from this loop when no stubs have been added, and no stubs
11963 have changed size. */
11964 if (stub_sec == NULL
11965 && (htab->glink_eh_frame == NULL
11966 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11967 break;
11968
11969 /* Ask the linker to do its stuff. */
11970 (*htab->layout_sections_again) ();
11971 }
11972
11973 maybe_strip_output (info, htab->brlt);
11974 if (htab->glink_eh_frame != NULL)
11975 maybe_strip_output (info, htab->glink_eh_frame);
11976
11977 return TRUE;
11978 }
11979
11980 /* Called after we have determined section placement. If sections
11981 move, we'll be called again. Provide a value for TOCstart. */
11982
11983 bfd_vma
11984 ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd)
11985 {
11986 asection *s;
11987 bfd_vma TOCstart;
11988
11989 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11990 order. The TOC starts where the first of these sections starts. */
11991 s = bfd_get_section_by_name (obfd, ".got");
11992 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11993 s = bfd_get_section_by_name (obfd, ".toc");
11994 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11995 s = bfd_get_section_by_name (obfd, ".tocbss");
11996 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11997 s = bfd_get_section_by_name (obfd, ".plt");
11998 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11999 {
12000 /* This may happen for
12001 o references to TOC base (SYM@toc / TOC[tc0]) without a
12002 .toc directive
12003 o bad linker script
12004 o --gc-sections and empty TOC sections
12005
12006 FIXME: Warn user? */
12007
12008 /* Look for a likely section. We probably won't even be
12009 using TOCstart. */
12010 for (s = obfd->sections; s != NULL; s = s->next)
12011 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
12012 | SEC_EXCLUDE))
12013 == (SEC_ALLOC | SEC_SMALL_DATA))
12014 break;
12015 if (s == NULL)
12016 for (s = obfd->sections; s != NULL; s = s->next)
12017 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
12018 == (SEC_ALLOC | SEC_SMALL_DATA))
12019 break;
12020 if (s == NULL)
12021 for (s = obfd->sections; s != NULL; s = s->next)
12022 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
12023 == SEC_ALLOC)
12024 break;
12025 if (s == NULL)
12026 for (s = obfd->sections; s != NULL; s = s->next)
12027 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
12028 break;
12029 }
12030
12031 TOCstart = 0;
12032 if (s != NULL)
12033 TOCstart = s->output_section->vma + s->output_offset;
12034
12035 _bfd_set_gp_value (obfd, TOCstart);
12036
12037 if (info != NULL && s != NULL && is_ppc64_elf (obfd))
12038 {
12039 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12040
12041 if (htab != NULL
12042 && htab->elf.hgot != NULL)
12043 {
12044 htab->elf.hgot->type = STT_OBJECT;
12045 htab->elf.hgot->root.type = bfd_link_hash_defined;
12046 htab->elf.hgot->root.u.def.value = TOC_BASE_OFF;
12047 htab->elf.hgot->root.u.def.section = s;
12048 }
12049 }
12050 return TOCstart;
12051 }
12052
12053 /* Build all the stubs associated with the current output file.
12054 The stubs are kept in a hash table attached to the main linker
12055 hash table. This function is called via gldelf64ppc_finish. */
12056
12057 bfd_boolean
12058 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
12059 struct bfd_link_info *info,
12060 char **stats)
12061 {
12062 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12063 asection *stub_sec;
12064 bfd_byte *p;
12065 int stub_sec_count = 0;
12066
12067 if (htab == NULL)
12068 return FALSE;
12069
12070 htab->emit_stub_syms = emit_stub_syms;
12071
12072 /* Allocate memory to hold the linker stubs. */
12073 for (stub_sec = htab->stub_bfd->sections;
12074 stub_sec != NULL;
12075 stub_sec = stub_sec->next)
12076 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
12077 && stub_sec->size != 0)
12078 {
12079 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
12080 if (stub_sec->contents == NULL)
12081 return FALSE;
12082 /* We want to check that built size is the same as calculated
12083 size. rawsize is a convenient location to use. */
12084 stub_sec->rawsize = stub_sec->size;
12085 stub_sec->size = 0;
12086 }
12087
12088 if (htab->glink != NULL && htab->glink->size != 0)
12089 {
12090 unsigned int indx;
12091 bfd_vma plt0;
12092
12093 /* Build the .glink plt call stub. */
12094 if (htab->emit_stub_syms)
12095 {
12096 struct elf_link_hash_entry *h;
12097 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
12098 TRUE, FALSE, FALSE);
12099 if (h == NULL)
12100 return FALSE;
12101 if (h->root.type == bfd_link_hash_new)
12102 {
12103 h->root.type = bfd_link_hash_defined;
12104 h->root.u.def.section = htab->glink;
12105 h->root.u.def.value = 8;
12106 h->ref_regular = 1;
12107 h->def_regular = 1;
12108 h->ref_regular_nonweak = 1;
12109 h->forced_local = 1;
12110 h->non_elf = 0;
12111 }
12112 }
12113 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
12114 if (info->emitrelocations)
12115 {
12116 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
12117 if (r == NULL)
12118 return FALSE;
12119 r->r_offset = (htab->glink->output_offset
12120 + htab->glink->output_section->vma);
12121 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
12122 r->r_addend = plt0;
12123 }
12124 p = htab->glink->contents;
12125 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
12126 bfd_put_64 (htab->glink->owner, plt0, p);
12127 p += 8;
12128 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
12129 p += 4;
12130 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
12131 p += 4;
12132 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
12133 p += 4;
12134 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
12135 p += 4;
12136 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
12137 p += 4;
12138 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
12139 p += 4;
12140 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
12141 p += 4;
12142 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
12143 p += 4;
12144 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
12145 p += 4;
12146 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
12147 p += 4;
12148 bfd_put_32 (htab->glink->owner, BCTR, p);
12149 p += 4;
12150 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
12151 {
12152 bfd_put_32 (htab->glink->owner, NOP, p);
12153 p += 4;
12154 }
12155
12156 /* Build the .glink lazy link call stubs. */
12157 indx = 0;
12158 while (p < htab->glink->contents + htab->glink->size)
12159 {
12160 if (indx < 0x8000)
12161 {
12162 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
12163 p += 4;
12164 }
12165 else
12166 {
12167 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
12168 p += 4;
12169 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
12170 p += 4;
12171 }
12172 bfd_put_32 (htab->glink->owner,
12173 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
12174 indx++;
12175 p += 4;
12176 }
12177 htab->glink->rawsize = p - htab->glink->contents;
12178 }
12179
12180 if (htab->brlt->size != 0)
12181 {
12182 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
12183 htab->brlt->size);
12184 if (htab->brlt->contents == NULL)
12185 return FALSE;
12186 }
12187 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
12188 {
12189 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
12190 htab->relbrlt->size);
12191 if (htab->relbrlt->contents == NULL)
12192 return FALSE;
12193 }
12194
12195 if (htab->glink_eh_frame != NULL
12196 && htab->glink_eh_frame->size != 0)
12197 {
12198 bfd_vma val;
12199 bfd_byte *last_fde;
12200 size_t last_fde_len, size, align, pad;
12201
12202 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
12203 if (p == NULL)
12204 return FALSE;
12205 htab->glink_eh_frame->contents = p;
12206 last_fde = p;
12207
12208 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
12209
12210 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
12211 /* CIE length (rewrite in case little-endian). */
12212 last_fde_len = sizeof (glink_eh_frame_cie) - 4;
12213 bfd_put_32 (htab->elf.dynobj, last_fde_len, p);
12214 p += sizeof (glink_eh_frame_cie);
12215
12216 for (stub_sec = htab->stub_bfd->sections;
12217 stub_sec != NULL;
12218 stub_sec = stub_sec->next)
12219 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12220 {
12221 last_fde = p;
12222 last_fde_len = 16;
12223 /* FDE length. */
12224 bfd_put_32 (htab->elf.dynobj, 16, p);
12225 p += 4;
12226 /* CIE pointer. */
12227 val = p - htab->glink_eh_frame->contents;
12228 bfd_put_32 (htab->elf.dynobj, val, p);
12229 p += 4;
12230 /* Offset to stub section. */
12231 val = (stub_sec->output_section->vma
12232 + stub_sec->output_offset);
12233 val -= (htab->glink_eh_frame->output_section->vma
12234 + htab->glink_eh_frame->output_offset);
12235 val -= p - htab->glink_eh_frame->contents;
12236 if (val + 0x80000000 > 0xffffffff)
12237 {
12238 info->callbacks->einfo
12239 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12240 stub_sec->name);
12241 return FALSE;
12242 }
12243 bfd_put_32 (htab->elf.dynobj, val, p);
12244 p += 4;
12245 /* stub section size. */
12246 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
12247 p += 4;
12248 /* Augmentation. */
12249 p += 1;
12250 /* Pad. */
12251 p += 3;
12252 }
12253 if (htab->glink != NULL && htab->glink->size != 0)
12254 {
12255 last_fde = p;
12256 last_fde_len = 20;
12257 /* FDE length. */
12258 bfd_put_32 (htab->elf.dynobj, 20, p);
12259 p += 4;
12260 /* CIE pointer. */
12261 val = p - htab->glink_eh_frame->contents;
12262 bfd_put_32 (htab->elf.dynobj, val, p);
12263 p += 4;
12264 /* Offset to .glink. */
12265 val = (htab->glink->output_section->vma
12266 + htab->glink->output_offset
12267 + 8);
12268 val -= (htab->glink_eh_frame->output_section->vma
12269 + htab->glink_eh_frame->output_offset);
12270 val -= p - htab->glink_eh_frame->contents;
12271 if (val + 0x80000000 > 0xffffffff)
12272 {
12273 info->callbacks->einfo
12274 (_("%P: %s offset too large for .eh_frame sdata4 encoding"),
12275 htab->glink->name);
12276 return FALSE;
12277 }
12278 bfd_put_32 (htab->elf.dynobj, val, p);
12279 p += 4;
12280 /* .glink size. */
12281 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
12282 p += 4;
12283 /* Augmentation. */
12284 p += 1;
12285
12286 *p++ = DW_CFA_advance_loc + 1;
12287 *p++ = DW_CFA_register;
12288 *p++ = 65;
12289 *p++ = 12;
12290 *p++ = DW_CFA_advance_loc + 4;
12291 *p++ = DW_CFA_restore_extended;
12292 *p++ = 65;
12293 }
12294 /* Subsume any padding into the last FDE if user .eh_frame
12295 sections are aligned more than glink_eh_frame. Otherwise any
12296 zero padding will be seen as a terminator. */
12297 size = p - htab->glink_eh_frame->contents;
12298 align = 1;
12299 align <<= htab->glink_eh_frame->output_section->alignment_power;
12300 align -= 1;
12301 pad = ((size + align) & ~align) - size;
12302 htab->glink_eh_frame->size = size + pad;
12303 bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde);
12304 }
12305
12306 /* Build the stubs as directed by the stub hash table. */
12307 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
12308
12309 if (htab->relbrlt != NULL)
12310 htab->relbrlt->reloc_count = 0;
12311
12312 if (htab->plt_stub_align != 0)
12313 for (stub_sec = htab->stub_bfd->sections;
12314 stub_sec != NULL;
12315 stub_sec = stub_sec->next)
12316 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12317 stub_sec->size = ((stub_sec->size + (1 << htab->plt_stub_align) - 1)
12318 & (-1 << htab->plt_stub_align));
12319
12320 for (stub_sec = htab->stub_bfd->sections;
12321 stub_sec != NULL;
12322 stub_sec = stub_sec->next)
12323 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
12324 {
12325 stub_sec_count += 1;
12326 if (stub_sec->rawsize != stub_sec->size)
12327 break;
12328 }
12329
12330 if (stub_sec != NULL
12331 || htab->glink->rawsize != htab->glink->size
12332 || (htab->glink_eh_frame != NULL
12333 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
12334 {
12335 htab->stub_error = TRUE;
12336 info->callbacks->einfo (_("%P: stubs don't match calculated size\n"));
12337 }
12338
12339 if (htab->stub_error)
12340 return FALSE;
12341
12342 if (stats != NULL)
12343 {
12344 *stats = bfd_malloc (500);
12345 if (*stats == NULL)
12346 return FALSE;
12347
12348 sprintf (*stats, _("linker stubs in %u group%s\n"
12349 " branch %lu\n"
12350 " toc adjust %lu\n"
12351 " long branch %lu\n"
12352 " long toc adj %lu\n"
12353 " plt call %lu\n"
12354 " plt call toc %lu"),
12355 stub_sec_count,
12356 stub_sec_count == 1 ? "" : "s",
12357 htab->stub_count[ppc_stub_long_branch - 1],
12358 htab->stub_count[ppc_stub_long_branch_r2off - 1],
12359 htab->stub_count[ppc_stub_plt_branch - 1],
12360 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
12361 htab->stub_count[ppc_stub_plt_call - 1],
12362 htab->stub_count[ppc_stub_plt_call_r2save - 1]);
12363 }
12364 return TRUE;
12365 }
12366
12367 /* This function undoes the changes made by add_symbol_adjust. */
12368
12369 static bfd_boolean
12370 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
12371 {
12372 struct ppc_link_hash_entry *eh;
12373
12374 if (h->root.type == bfd_link_hash_indirect)
12375 return TRUE;
12376
12377 eh = (struct ppc_link_hash_entry *) h;
12378 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
12379 return TRUE;
12380
12381 eh->elf.root.type = bfd_link_hash_undefined;
12382 return TRUE;
12383 }
12384
12385 void
12386 ppc64_elf_restore_symbols (struct bfd_link_info *info)
12387 {
12388 struct ppc_link_hash_table *htab = ppc_hash_table (info);
12389
12390 if (htab != NULL)
12391 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
12392 }
12393
12394 /* What to do when ld finds relocations against symbols defined in
12395 discarded sections. */
12396
12397 static unsigned int
12398 ppc64_elf_action_discarded (asection *sec)
12399 {
12400 if (strcmp (".opd", sec->name) == 0)
12401 return 0;
12402
12403 if (strcmp (".toc", sec->name) == 0)
12404 return 0;
12405
12406 if (strcmp (".toc1", sec->name) == 0)
12407 return 0;
12408
12409 return _bfd_elf_default_action_discarded (sec);
12410 }
12411
12412 /* The RELOCATE_SECTION function is called by the ELF backend linker
12413 to handle the relocations for a section.
12414
12415 The relocs are always passed as Rela structures; if the section
12416 actually uses Rel structures, the r_addend field will always be
12417 zero.
12418
12419 This function is responsible for adjust the section contents as
12420 necessary, and (if using Rela relocs and generating a
12421 relocatable output file) adjusting the reloc addend as
12422 necessary.
12423
12424 This function does not have to worry about setting the reloc
12425 address or the reloc symbol index.
12426
12427 LOCAL_SYMS is a pointer to the swapped in local symbols.
12428
12429 LOCAL_SECTIONS is an array giving the section in the input file
12430 corresponding to the st_shndx field of each local symbol.
12431
12432 The global hash table entry for the global symbols can be found
12433 via elf_sym_hashes (input_bfd).
12434
12435 When generating relocatable output, this function must handle
12436 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
12437 going to be the section symbol corresponding to the output
12438 section, which means that the addend must be adjusted
12439 accordingly. */
12440
12441 static bfd_boolean
12442 ppc64_elf_relocate_section (bfd *output_bfd,
12443 struct bfd_link_info *info,
12444 bfd *input_bfd,
12445 asection *input_section,
12446 bfd_byte *contents,
12447 Elf_Internal_Rela *relocs,
12448 Elf_Internal_Sym *local_syms,
12449 asection **local_sections)
12450 {
12451 struct ppc_link_hash_table *htab;
12452 Elf_Internal_Shdr *symtab_hdr;
12453 struct elf_link_hash_entry **sym_hashes;
12454 Elf_Internal_Rela *rel;
12455 Elf_Internal_Rela *relend;
12456 Elf_Internal_Rela outrel;
12457 bfd_byte *loc;
12458 struct got_entry **local_got_ents;
12459 bfd_vma TOCstart;
12460 bfd_boolean ret = TRUE;
12461 bfd_boolean is_opd;
12462 /* Assume 'at' branch hints. */
12463 bfd_boolean is_isa_v2 = TRUE;
12464 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
12465
12466 /* Initialize howto table if needed. */
12467 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
12468 ppc_howto_init ();
12469
12470 htab = ppc_hash_table (info);
12471 if (htab == NULL)
12472 return FALSE;
12473
12474 /* Don't relocate stub sections. */
12475 if (input_section->owner == htab->stub_bfd)
12476 return TRUE;
12477
12478 BFD_ASSERT (is_ppc64_elf (input_bfd));
12479
12480 local_got_ents = elf_local_got_ents (input_bfd);
12481 TOCstart = elf_gp (output_bfd);
12482 symtab_hdr = &elf_symtab_hdr (input_bfd);
12483 sym_hashes = elf_sym_hashes (input_bfd);
12484 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
12485
12486 rel = relocs;
12487 relend = relocs + input_section->reloc_count;
12488 for (; rel < relend; rel++)
12489 {
12490 enum elf_ppc64_reloc_type r_type;
12491 bfd_vma addend;
12492 bfd_reloc_status_type r;
12493 Elf_Internal_Sym *sym;
12494 asection *sec;
12495 struct elf_link_hash_entry *h_elf;
12496 struct ppc_link_hash_entry *h;
12497 struct ppc_link_hash_entry *fdh;
12498 const char *sym_name;
12499 unsigned long r_symndx, toc_symndx;
12500 bfd_vma toc_addend;
12501 unsigned char tls_mask, tls_gd, tls_type;
12502 unsigned char sym_type;
12503 bfd_vma relocation;
12504 bfd_boolean unresolved_reloc;
12505 bfd_boolean warned;
12506 enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest;
12507 unsigned int insn;
12508 unsigned int mask;
12509 struct ppc_stub_hash_entry *stub_entry;
12510 bfd_vma max_br_offset;
12511 bfd_vma from;
12512 const Elf_Internal_Rela orig_rel = *rel;
12513
12514 r_type = ELF64_R_TYPE (rel->r_info);
12515 r_symndx = ELF64_R_SYM (rel->r_info);
12516
12517 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
12518 symbol of the previous ADDR64 reloc. The symbol gives us the
12519 proper TOC base to use. */
12520 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
12521 && rel != relocs
12522 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
12523 && is_opd)
12524 r_symndx = ELF64_R_SYM (rel[-1].r_info);
12525
12526 sym = NULL;
12527 sec = NULL;
12528 h_elf = NULL;
12529 sym_name = NULL;
12530 unresolved_reloc = FALSE;
12531 warned = FALSE;
12532
12533 if (r_symndx < symtab_hdr->sh_info)
12534 {
12535 /* It's a local symbol. */
12536 struct _opd_sec_data *opd;
12537
12538 sym = local_syms + r_symndx;
12539 sec = local_sections[r_symndx];
12540 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
12541 sym_type = ELF64_ST_TYPE (sym->st_info);
12542 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
12543 opd = get_opd_info (sec);
12544 if (opd != NULL && opd->adjust != NULL)
12545 {
12546 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
12547 if (adjust == -1)
12548 relocation = 0;
12549 else
12550 {
12551 /* If this is a relocation against the opd section sym
12552 and we have edited .opd, adjust the reloc addend so
12553 that ld -r and ld --emit-relocs output is correct.
12554 If it is a reloc against some other .opd symbol,
12555 then the symbol value will be adjusted later. */
12556 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
12557 rel->r_addend += adjust;
12558 else
12559 relocation += adjust;
12560 }
12561 }
12562 }
12563 else
12564 {
12565 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
12566 r_symndx, symtab_hdr, sym_hashes,
12567 h_elf, sec, relocation,
12568 unresolved_reloc, warned);
12569 sym_name = h_elf->root.root.string;
12570 sym_type = h_elf->type;
12571 if (sec != NULL
12572 && sec->owner == output_bfd
12573 && strcmp (sec->name, ".opd") == 0)
12574 {
12575 /* This is a symbol defined in a linker script. All
12576 such are defined in output sections, even those
12577 defined by simple assignment from a symbol defined in
12578 an input section. Transfer the symbol to an
12579 appropriate input .opd section, so that a branch to
12580 this symbol will be mapped to the location specified
12581 by the opd entry. */
12582 struct bfd_link_order *lo;
12583 for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next)
12584 if (lo->type == bfd_indirect_link_order)
12585 {
12586 asection *isec = lo->u.indirect.section;
12587 if (h_elf->root.u.def.value >= isec->output_offset
12588 && h_elf->root.u.def.value < (isec->output_offset
12589 + isec->size))
12590 {
12591 h_elf->root.u.def.value -= isec->output_offset;
12592 h_elf->root.u.def.section = isec;
12593 sec = isec;
12594 break;
12595 }
12596 }
12597 }
12598 }
12599 h = (struct ppc_link_hash_entry *) h_elf;
12600
12601 if (sec != NULL && discarded_section (sec))
12602 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
12603 rel, 1, relend,
12604 ppc64_elf_howto_table[r_type], 0,
12605 contents);
12606
12607 if (info->relocatable)
12608 continue;
12609
12610 if (h != NULL && &h->elf == htab->elf.hgot)
12611 {
12612 relocation = (TOCstart
12613 + htab->stub_group[input_section->id].toc_off);
12614 sec = bfd_abs_section_ptr;
12615 unresolved_reloc = FALSE;
12616 }
12617
12618 /* TLS optimizations. Replace instruction sequences and relocs
12619 based on information we collected in tls_optimize. We edit
12620 RELOCS so that --emit-relocs will output something sensible
12621 for the final instruction stream. */
12622 tls_mask = 0;
12623 tls_gd = 0;
12624 toc_symndx = 0;
12625 if (h != NULL)
12626 tls_mask = h->tls_mask;
12627 else if (local_got_ents != NULL)
12628 {
12629 struct plt_entry **local_plt = (struct plt_entry **)
12630 (local_got_ents + symtab_hdr->sh_info);
12631 unsigned char *lgot_masks = (unsigned char *)
12632 (local_plt + symtab_hdr->sh_info);
12633 tls_mask = lgot_masks[r_symndx];
12634 }
12635 if (tls_mask == 0
12636 && (r_type == R_PPC64_TLS
12637 || r_type == R_PPC64_TLSGD
12638 || r_type == R_PPC64_TLSLD))
12639 {
12640 /* Check for toc tls entries. */
12641 unsigned char *toc_tls;
12642
12643 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12644 &local_syms, rel, input_bfd))
12645 return FALSE;
12646
12647 if (toc_tls)
12648 tls_mask = *toc_tls;
12649 }
12650
12651 /* Check that tls relocs are used with tls syms, and non-tls
12652 relocs are used with non-tls syms. */
12653 if (r_symndx != STN_UNDEF
12654 && r_type != R_PPC64_NONE
12655 && (h == NULL
12656 || h->elf.root.type == bfd_link_hash_defined
12657 || h->elf.root.type == bfd_link_hash_defweak)
12658 && (IS_PPC64_TLS_RELOC (r_type)
12659 != (sym_type == STT_TLS
12660 || (sym_type == STT_SECTION
12661 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
12662 {
12663 if (tls_mask != 0
12664 && (r_type == R_PPC64_TLS
12665 || r_type == R_PPC64_TLSGD
12666 || r_type == R_PPC64_TLSLD))
12667 /* R_PPC64_TLS is OK against a symbol in the TOC. */
12668 ;
12669 else
12670 info->callbacks->einfo
12671 (!IS_PPC64_TLS_RELOC (r_type)
12672 ? _("%P: %H: %s used with TLS symbol `%T'\n")
12673 : _("%P: %H: %s used with non-TLS symbol `%T'\n"),
12674 input_bfd, input_section, rel->r_offset,
12675 ppc64_elf_howto_table[r_type]->name,
12676 sym_name);
12677 }
12678
12679 /* Ensure reloc mapping code below stays sane. */
12680 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
12681 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
12682 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
12683 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
12684 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
12685 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
12686 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
12687 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
12688 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
12689 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
12690 abort ();
12691
12692 switch (r_type)
12693 {
12694 default:
12695 break;
12696
12697 case R_PPC64_LO_DS_OPT:
12698 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12699 if ((insn & (0x3f << 26)) != 58u << 26)
12700 abort ();
12701 insn += (14u << 26) - (58u << 26);
12702 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12703 r_type = R_PPC64_TOC16_LO;
12704 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12705 break;
12706
12707 case R_PPC64_TOC16:
12708 case R_PPC64_TOC16_LO:
12709 case R_PPC64_TOC16_DS:
12710 case R_PPC64_TOC16_LO_DS:
12711 {
12712 /* Check for toc tls entries. */
12713 unsigned char *toc_tls;
12714 int retval;
12715
12716 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12717 &local_syms, rel, input_bfd);
12718 if (retval == 0)
12719 return FALSE;
12720
12721 if (toc_tls)
12722 {
12723 tls_mask = *toc_tls;
12724 if (r_type == R_PPC64_TOC16_DS
12725 || r_type == R_PPC64_TOC16_LO_DS)
12726 {
12727 if (tls_mask != 0
12728 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12729 goto toctprel;
12730 }
12731 else
12732 {
12733 /* If we found a GD reloc pair, then we might be
12734 doing a GD->IE transition. */
12735 if (retval == 2)
12736 {
12737 tls_gd = TLS_TPRELGD;
12738 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12739 goto tls_ldgd_opt;
12740 }
12741 else if (retval == 3)
12742 {
12743 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12744 goto tls_ldgd_opt;
12745 }
12746 }
12747 }
12748 }
12749 break;
12750
12751 case R_PPC64_GOT_TPREL16_HI:
12752 case R_PPC64_GOT_TPREL16_HA:
12753 if (tls_mask != 0
12754 && (tls_mask & TLS_TPREL) == 0)
12755 {
12756 rel->r_offset -= d_offset;
12757 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12758 r_type = R_PPC64_NONE;
12759 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12760 }
12761 break;
12762
12763 case R_PPC64_GOT_TPREL16_DS:
12764 case R_PPC64_GOT_TPREL16_LO_DS:
12765 if (tls_mask != 0
12766 && (tls_mask & TLS_TPREL) == 0)
12767 {
12768 toctprel:
12769 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12770 insn &= 31 << 21;
12771 insn |= 0x3c0d0000; /* addis 0,13,0 */
12772 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12773 r_type = R_PPC64_TPREL16_HA;
12774 if (toc_symndx != 0)
12775 {
12776 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12777 rel->r_addend = toc_addend;
12778 /* We changed the symbol. Start over in order to
12779 get h, sym, sec etc. right. */
12780 rel--;
12781 continue;
12782 }
12783 else
12784 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12785 }
12786 break;
12787
12788 case R_PPC64_TLS:
12789 if (tls_mask != 0
12790 && (tls_mask & TLS_TPREL) == 0)
12791 {
12792 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12793 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12794 if (insn == 0)
12795 abort ();
12796 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12797 /* Was PPC64_TLS which sits on insn boundary, now
12798 PPC64_TPREL16_LO which is at low-order half-word. */
12799 rel->r_offset += d_offset;
12800 r_type = R_PPC64_TPREL16_LO;
12801 if (toc_symndx != 0)
12802 {
12803 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12804 rel->r_addend = toc_addend;
12805 /* We changed the symbol. Start over in order to
12806 get h, sym, sec etc. right. */
12807 rel--;
12808 continue;
12809 }
12810 else
12811 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12812 }
12813 break;
12814
12815 case R_PPC64_GOT_TLSGD16_HI:
12816 case R_PPC64_GOT_TLSGD16_HA:
12817 tls_gd = TLS_TPRELGD;
12818 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12819 goto tls_gdld_hi;
12820 break;
12821
12822 case R_PPC64_GOT_TLSLD16_HI:
12823 case R_PPC64_GOT_TLSLD16_HA:
12824 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12825 {
12826 tls_gdld_hi:
12827 if ((tls_mask & tls_gd) != 0)
12828 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12829 + R_PPC64_GOT_TPREL16_DS);
12830 else
12831 {
12832 rel->r_offset -= d_offset;
12833 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12834 r_type = R_PPC64_NONE;
12835 }
12836 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12837 }
12838 break;
12839
12840 case R_PPC64_GOT_TLSGD16:
12841 case R_PPC64_GOT_TLSGD16_LO:
12842 tls_gd = TLS_TPRELGD;
12843 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12844 goto tls_ldgd_opt;
12845 break;
12846
12847 case R_PPC64_GOT_TLSLD16:
12848 case R_PPC64_GOT_TLSLD16_LO:
12849 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12850 {
12851 unsigned int insn1, insn2, insn3;
12852 bfd_vma offset;
12853
12854 tls_ldgd_opt:
12855 offset = (bfd_vma) -1;
12856 /* If not using the newer R_PPC64_TLSGD/LD to mark
12857 __tls_get_addr calls, we must trust that the call
12858 stays with its arg setup insns, ie. that the next
12859 reloc is the __tls_get_addr call associated with
12860 the current reloc. Edit both insns. */
12861 if (input_section->has_tls_get_addr_call
12862 && rel + 1 < relend
12863 && branch_reloc_hash_match (input_bfd, rel + 1,
12864 htab->tls_get_addr,
12865 htab->tls_get_addr_fd))
12866 offset = rel[1].r_offset;
12867 if ((tls_mask & tls_gd) != 0)
12868 {
12869 /* IE */
12870 insn1 = bfd_get_32 (output_bfd,
12871 contents + rel->r_offset - d_offset);
12872 insn1 &= (1 << 26) - (1 << 2);
12873 insn1 |= 58 << 26; /* ld */
12874 insn2 = 0x7c636a14; /* add 3,3,13 */
12875 if (offset != (bfd_vma) -1)
12876 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12877 if ((tls_mask & TLS_EXPLICIT) == 0)
12878 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12879 + R_PPC64_GOT_TPREL16_DS);
12880 else
12881 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12882 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12883 }
12884 else
12885 {
12886 /* LE */
12887 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12888 insn2 = 0x38630000; /* addi 3,3,0 */
12889 if (tls_gd == 0)
12890 {
12891 /* Was an LD reloc. */
12892 if (toc_symndx)
12893 sec = local_sections[toc_symndx];
12894 for (r_symndx = 0;
12895 r_symndx < symtab_hdr->sh_info;
12896 r_symndx++)
12897 if (local_sections[r_symndx] == sec)
12898 break;
12899 if (r_symndx >= symtab_hdr->sh_info)
12900 r_symndx = STN_UNDEF;
12901 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12902 if (r_symndx != STN_UNDEF)
12903 rel->r_addend -= (local_syms[r_symndx].st_value
12904 + sec->output_offset
12905 + sec->output_section->vma);
12906 }
12907 else if (toc_symndx != 0)
12908 {
12909 r_symndx = toc_symndx;
12910 rel->r_addend = toc_addend;
12911 }
12912 r_type = R_PPC64_TPREL16_HA;
12913 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12914 if (offset != (bfd_vma) -1)
12915 {
12916 rel[1].r_info = ELF64_R_INFO (r_symndx,
12917 R_PPC64_TPREL16_LO);
12918 rel[1].r_offset = offset + d_offset;
12919 rel[1].r_addend = rel->r_addend;
12920 }
12921 }
12922 bfd_put_32 (output_bfd, insn1,
12923 contents + rel->r_offset - d_offset);
12924 if (offset != (bfd_vma) -1)
12925 {
12926 insn3 = bfd_get_32 (output_bfd,
12927 contents + offset + 4);
12928 if (insn3 == NOP
12929 || insn3 == CROR_151515 || insn3 == CROR_313131)
12930 {
12931 rel[1].r_offset += 4;
12932 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12933 insn2 = NOP;
12934 }
12935 bfd_put_32 (output_bfd, insn2, contents + offset);
12936 }
12937 if ((tls_mask & tls_gd) == 0
12938 && (tls_gd == 0 || toc_symndx != 0))
12939 {
12940 /* We changed the symbol. Start over in order
12941 to get h, sym, sec etc. right. */
12942 rel--;
12943 continue;
12944 }
12945 }
12946 break;
12947
12948 case R_PPC64_TLSGD:
12949 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12950 {
12951 unsigned int insn2, insn3;
12952 bfd_vma offset = rel->r_offset;
12953
12954 if ((tls_mask & TLS_TPRELGD) != 0)
12955 {
12956 /* IE */
12957 r_type = R_PPC64_NONE;
12958 insn2 = 0x7c636a14; /* add 3,3,13 */
12959 }
12960 else
12961 {
12962 /* LE */
12963 if (toc_symndx != 0)
12964 {
12965 r_symndx = toc_symndx;
12966 rel->r_addend = toc_addend;
12967 }
12968 r_type = R_PPC64_TPREL16_LO;
12969 rel->r_offset = offset + d_offset;
12970 insn2 = 0x38630000; /* addi 3,3,0 */
12971 }
12972 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12973 /* Zap the reloc on the _tls_get_addr call too. */
12974 BFD_ASSERT (offset == rel[1].r_offset);
12975 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12976 insn3 = bfd_get_32 (output_bfd,
12977 contents + offset + 4);
12978 if (insn3 == NOP
12979 || insn3 == CROR_151515 || insn3 == CROR_313131)
12980 {
12981 rel->r_offset += 4;
12982 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12983 insn2 = NOP;
12984 }
12985 bfd_put_32 (output_bfd, insn2, contents + offset);
12986 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12987 {
12988 rel--;
12989 continue;
12990 }
12991 }
12992 break;
12993
12994 case R_PPC64_TLSLD:
12995 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12996 {
12997 unsigned int insn2, insn3;
12998 bfd_vma offset = rel->r_offset;
12999
13000 if (toc_symndx)
13001 sec = local_sections[toc_symndx];
13002 for (r_symndx = 0;
13003 r_symndx < symtab_hdr->sh_info;
13004 r_symndx++)
13005 if (local_sections[r_symndx] == sec)
13006 break;
13007 if (r_symndx >= symtab_hdr->sh_info)
13008 r_symndx = STN_UNDEF;
13009 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
13010 if (r_symndx != STN_UNDEF)
13011 rel->r_addend -= (local_syms[r_symndx].st_value
13012 + sec->output_offset
13013 + sec->output_section->vma);
13014
13015 r_type = R_PPC64_TPREL16_LO;
13016 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13017 rel->r_offset = offset + d_offset;
13018 /* Zap the reloc on the _tls_get_addr call too. */
13019 BFD_ASSERT (offset == rel[1].r_offset);
13020 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
13021 insn2 = 0x38630000; /* addi 3,3,0 */
13022 insn3 = bfd_get_32 (output_bfd,
13023 contents + offset + 4);
13024 if (insn3 == NOP
13025 || insn3 == CROR_151515 || insn3 == CROR_313131)
13026 {
13027 rel->r_offset += 4;
13028 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
13029 insn2 = NOP;
13030 }
13031 bfd_put_32 (output_bfd, insn2, contents + offset);
13032 rel--;
13033 continue;
13034 }
13035 break;
13036
13037 case R_PPC64_DTPMOD64:
13038 if (rel + 1 < relend
13039 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
13040 && rel[1].r_offset == rel->r_offset + 8)
13041 {
13042 if ((tls_mask & TLS_GD) == 0)
13043 {
13044 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
13045 if ((tls_mask & TLS_TPRELGD) != 0)
13046 r_type = R_PPC64_TPREL64;
13047 else
13048 {
13049 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13050 r_type = R_PPC64_NONE;
13051 }
13052 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13053 }
13054 }
13055 else
13056 {
13057 if ((tls_mask & TLS_LD) == 0)
13058 {
13059 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
13060 r_type = R_PPC64_NONE;
13061 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13062 }
13063 }
13064 break;
13065
13066 case R_PPC64_TPREL64:
13067 if ((tls_mask & TLS_TPREL) == 0)
13068 {
13069 r_type = R_PPC64_NONE;
13070 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
13071 }
13072 break;
13073 }
13074
13075 /* Handle other relocations that tweak non-addend part of insn. */
13076 insn = 0;
13077 max_br_offset = 1 << 25;
13078 addend = rel->r_addend;
13079 reloc_dest = DEST_NORMAL;
13080 switch (r_type)
13081 {
13082 default:
13083 break;
13084
13085 case R_PPC64_TOCSAVE:
13086 if (relocation + addend == (rel->r_offset
13087 + input_section->output_offset
13088 + input_section->output_section->vma)
13089 && tocsave_find (htab, NO_INSERT,
13090 &local_syms, rel, input_bfd))
13091 {
13092 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
13093 if (insn == NOP
13094 || insn == CROR_151515 || insn == CROR_313131)
13095 bfd_put_32 (input_bfd, STD_R2_40R1,
13096 contents + rel->r_offset);
13097 }
13098 break;
13099
13100 /* Branch taken prediction relocations. */
13101 case R_PPC64_ADDR14_BRTAKEN:
13102 case R_PPC64_REL14_BRTAKEN:
13103 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
13104 /* Fall thru. */
13105
13106 /* Branch not taken prediction relocations. */
13107 case R_PPC64_ADDR14_BRNTAKEN:
13108 case R_PPC64_REL14_BRNTAKEN:
13109 insn |= bfd_get_32 (output_bfd,
13110 contents + rel->r_offset) & ~(0x01 << 21);
13111 /* Fall thru. */
13112
13113 case R_PPC64_REL14:
13114 max_br_offset = 1 << 15;
13115 /* Fall thru. */
13116
13117 case R_PPC64_REL24:
13118 /* Calls to functions with a different TOC, such as calls to
13119 shared objects, need to alter the TOC pointer. This is
13120 done using a linkage stub. A REL24 branching to these
13121 linkage stubs needs to be followed by a nop, as the nop
13122 will be replaced with an instruction to restore the TOC
13123 base pointer. */
13124 fdh = h;
13125 if (h != NULL
13126 && h->oh != NULL
13127 && h->oh->is_func_descriptor)
13128 fdh = ppc_follow_link (h->oh);
13129 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel,
13130 htab);
13131 if (stub_entry != NULL
13132 && (stub_entry->stub_type == ppc_stub_plt_call
13133 || stub_entry->stub_type == ppc_stub_plt_call_r2save
13134 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
13135 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
13136 {
13137 bfd_boolean can_plt_call = FALSE;
13138
13139 /* All of these stubs will modify r2, so there must be a
13140 branch and link followed by a nop. The nop is
13141 replaced by an insn to restore r2. */
13142 if (rel->r_offset + 8 <= input_section->size)
13143 {
13144 unsigned long br;
13145
13146 br = bfd_get_32 (input_bfd,
13147 contents + rel->r_offset);
13148 if ((br & 1) != 0)
13149 {
13150 unsigned long nop;
13151
13152 nop = bfd_get_32 (input_bfd,
13153 contents + rel->r_offset + 4);
13154 if (nop == NOP
13155 || nop == CROR_151515 || nop == CROR_313131)
13156 {
13157 if (h != NULL
13158 && (h == htab->tls_get_addr_fd
13159 || h == htab->tls_get_addr)
13160 && !htab->no_tls_get_addr_opt)
13161 {
13162 /* Special stub used, leave nop alone. */
13163 }
13164 else
13165 bfd_put_32 (input_bfd, LD_R2_40R1,
13166 contents + rel->r_offset + 4);
13167 can_plt_call = TRUE;
13168 }
13169 }
13170 }
13171
13172 if (!can_plt_call && h != NULL)
13173 {
13174 const char *name = h->elf.root.root.string;
13175
13176 if (*name == '.')
13177 ++name;
13178
13179 if (strncmp (name, "__libc_start_main", 17) == 0
13180 && (name[17] == 0 || name[17] == '@'))
13181 {
13182 /* Allow crt1 branch to go via a toc adjusting
13183 stub. Other calls that never return could do
13184 the same, if we could detect such. */
13185 can_plt_call = TRUE;
13186 }
13187 }
13188
13189 if (!can_plt_call)
13190 {
13191 /* g++ as of 20130507 emits self-calls without a
13192 following nop. This is arguably wrong since we
13193 have conflicting information. On the one hand a
13194 global symbol and on the other a local call
13195 sequence, but don't error for this special case.
13196 It isn't possible to cheaply verify we have
13197 exactly such a call. Allow all calls to the same
13198 section. */
13199 asection *code_sec = sec;
13200
13201 if (get_opd_info (sec) != NULL)
13202 {
13203 bfd_vma off = (relocation + addend
13204 - sec->output_section->vma
13205 - sec->output_offset);
13206
13207 opd_entry_value (sec, off, &code_sec, NULL, FALSE);
13208 }
13209 if (code_sec == input_section)
13210 can_plt_call = TRUE;
13211 }
13212
13213 if (!can_plt_call)
13214 {
13215 info->callbacks->einfo
13216 (_("%P: %H: call to `%T' lacks nop, can't restore toc; "
13217 "recompile with -fPIC"),
13218 input_bfd, input_section, rel->r_offset, sym_name);
13219
13220 bfd_set_error (bfd_error_bad_value);
13221 ret = FALSE;
13222 }
13223
13224 if (can_plt_call
13225 && (stub_entry->stub_type == ppc_stub_plt_call
13226 || stub_entry->stub_type == ppc_stub_plt_call_r2save))
13227 unresolved_reloc = FALSE;
13228 }
13229
13230 if ((stub_entry == NULL
13231 || stub_entry->stub_type == ppc_stub_long_branch
13232 || stub_entry->stub_type == ppc_stub_plt_branch)
13233 && get_opd_info (sec) != NULL)
13234 {
13235 /* The branch destination is the value of the opd entry. */
13236 bfd_vma off = (relocation + addend
13237 - sec->output_section->vma
13238 - sec->output_offset);
13239 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE);
13240 if (dest != (bfd_vma) -1)
13241 {
13242 relocation = dest;
13243 addend = 0;
13244 reloc_dest = DEST_OPD;
13245 }
13246 }
13247
13248 /* If the branch is out of reach we ought to have a long
13249 branch stub. */
13250 from = (rel->r_offset
13251 + input_section->output_offset
13252 + input_section->output_section->vma);
13253
13254 if (stub_entry != NULL
13255 && (stub_entry->stub_type == ppc_stub_long_branch
13256 || stub_entry->stub_type == ppc_stub_plt_branch)
13257 && (r_type == R_PPC64_ADDR14_BRTAKEN
13258 || r_type == R_PPC64_ADDR14_BRNTAKEN
13259 || (relocation + addend - from + max_br_offset
13260 < 2 * max_br_offset)))
13261 /* Don't use the stub if this branch is in range. */
13262 stub_entry = NULL;
13263
13264 if (stub_entry != NULL)
13265 {
13266 /* Munge up the value and addend so that we call the stub
13267 rather than the procedure directly. */
13268 relocation = (stub_entry->stub_offset
13269 + stub_entry->stub_sec->output_offset
13270 + stub_entry->stub_sec->output_section->vma);
13271 addend = 0;
13272 reloc_dest = DEST_STUB;
13273
13274 if ((stub_entry->stub_type == ppc_stub_plt_call
13275 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13276 && (ALWAYS_EMIT_R2SAVE
13277 || stub_entry->stub_type == ppc_stub_plt_call_r2save)
13278 && rel + 1 < relend
13279 && rel[1].r_offset == rel->r_offset + 4
13280 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)
13281 relocation += 4;
13282 }
13283
13284 if (insn != 0)
13285 {
13286 if (is_isa_v2)
13287 {
13288 /* Set 'a' bit. This is 0b00010 in BO field for branch
13289 on CR(BI) insns (BO == 001at or 011at), and 0b01000
13290 for branch on CTR insns (BO == 1a00t or 1a01t). */
13291 if ((insn & (0x14 << 21)) == (0x04 << 21))
13292 insn |= 0x02 << 21;
13293 else if ((insn & (0x14 << 21)) == (0x10 << 21))
13294 insn |= 0x08 << 21;
13295 else
13296 break;
13297 }
13298 else
13299 {
13300 /* Invert 'y' bit if not the default. */
13301 if ((bfd_signed_vma) (relocation + addend - from) < 0)
13302 insn ^= 0x01 << 21;
13303 }
13304
13305 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
13306 }
13307
13308 /* NOP out calls to undefined weak functions.
13309 We can thus call a weak function without first
13310 checking whether the function is defined. */
13311 else if (h != NULL
13312 && h->elf.root.type == bfd_link_hash_undefweak
13313 && h->elf.dynindx == -1
13314 && r_type == R_PPC64_REL24
13315 && relocation == 0
13316 && addend == 0)
13317 {
13318 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
13319 continue;
13320 }
13321 break;
13322 }
13323
13324 /* Set `addend'. */
13325 tls_type = 0;
13326 switch (r_type)
13327 {
13328 default:
13329 info->callbacks->einfo
13330 (_("%P: %B: unknown relocation type %d for `%T'\n"),
13331 input_bfd, (int) r_type, sym_name);
13332
13333 bfd_set_error (bfd_error_bad_value);
13334 ret = FALSE;
13335 continue;
13336
13337 case R_PPC64_NONE:
13338 case R_PPC64_TLS:
13339 case R_PPC64_TLSGD:
13340 case R_PPC64_TLSLD:
13341 case R_PPC64_TOCSAVE:
13342 case R_PPC64_GNU_VTINHERIT:
13343 case R_PPC64_GNU_VTENTRY:
13344 continue;
13345
13346 /* GOT16 relocations. Like an ADDR16 using the symbol's
13347 address in the GOT as relocation value instead of the
13348 symbol's value itself. Also, create a GOT entry for the
13349 symbol and put the symbol value there. */
13350 case R_PPC64_GOT_TLSGD16:
13351 case R_PPC64_GOT_TLSGD16_LO:
13352 case R_PPC64_GOT_TLSGD16_HI:
13353 case R_PPC64_GOT_TLSGD16_HA:
13354 tls_type = TLS_TLS | TLS_GD;
13355 goto dogot;
13356
13357 case R_PPC64_GOT_TLSLD16:
13358 case R_PPC64_GOT_TLSLD16_LO:
13359 case R_PPC64_GOT_TLSLD16_HI:
13360 case R_PPC64_GOT_TLSLD16_HA:
13361 tls_type = TLS_TLS | TLS_LD;
13362 goto dogot;
13363
13364 case R_PPC64_GOT_TPREL16_DS:
13365 case R_PPC64_GOT_TPREL16_LO_DS:
13366 case R_PPC64_GOT_TPREL16_HI:
13367 case R_PPC64_GOT_TPREL16_HA:
13368 tls_type = TLS_TLS | TLS_TPREL;
13369 goto dogot;
13370
13371 case R_PPC64_GOT_DTPREL16_DS:
13372 case R_PPC64_GOT_DTPREL16_LO_DS:
13373 case R_PPC64_GOT_DTPREL16_HI:
13374 case R_PPC64_GOT_DTPREL16_HA:
13375 tls_type = TLS_TLS | TLS_DTPREL;
13376 goto dogot;
13377
13378 case R_PPC64_GOT16:
13379 case R_PPC64_GOT16_LO:
13380 case R_PPC64_GOT16_HI:
13381 case R_PPC64_GOT16_HA:
13382 case R_PPC64_GOT16_DS:
13383 case R_PPC64_GOT16_LO_DS:
13384 dogot:
13385 {
13386 /* Relocation is to the entry for this symbol in the global
13387 offset table. */
13388 asection *got;
13389 bfd_vma *offp;
13390 bfd_vma off;
13391 unsigned long indx = 0;
13392 struct got_entry *ent;
13393
13394 if (tls_type == (TLS_TLS | TLS_LD)
13395 && (h == NULL
13396 || !h->elf.def_dynamic))
13397 ent = ppc64_tlsld_got (input_bfd);
13398 else
13399 {
13400
13401 if (h != NULL)
13402 {
13403 bfd_boolean dyn = htab->elf.dynamic_sections_created;
13404 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
13405 &h->elf)
13406 || (info->shared
13407 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
13408 /* This is actually a static link, or it is a
13409 -Bsymbolic link and the symbol is defined
13410 locally, or the symbol was forced to be local
13411 because of a version file. */
13412 ;
13413 else
13414 {
13415 BFD_ASSERT (h->elf.dynindx != -1);
13416 indx = h->elf.dynindx;
13417 unresolved_reloc = FALSE;
13418 }
13419 ent = h->elf.got.glist;
13420 }
13421 else
13422 {
13423 if (local_got_ents == NULL)
13424 abort ();
13425 ent = local_got_ents[r_symndx];
13426 }
13427
13428 for (; ent != NULL; ent = ent->next)
13429 if (ent->addend == orig_rel.r_addend
13430 && ent->owner == input_bfd
13431 && ent->tls_type == tls_type)
13432 break;
13433 }
13434
13435 if (ent == NULL)
13436 abort ();
13437 if (ent->is_indirect)
13438 ent = ent->got.ent;
13439 offp = &ent->got.offset;
13440 got = ppc64_elf_tdata (ent->owner)->got;
13441 if (got == NULL)
13442 abort ();
13443
13444 /* The offset must always be a multiple of 8. We use the
13445 least significant bit to record whether we have already
13446 processed this entry. */
13447 off = *offp;
13448 if ((off & 1) != 0)
13449 off &= ~1;
13450 else
13451 {
13452 /* Generate relocs for the dynamic linker, except in
13453 the case of TLSLD where we'll use one entry per
13454 module. */
13455 asection *relgot;
13456 bfd_boolean ifunc;
13457
13458 *offp = off | 1;
13459 relgot = NULL;
13460 ifunc = (h != NULL
13461 ? h->elf.type == STT_GNU_IFUNC
13462 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
13463 if (ifunc)
13464 relgot = htab->reliplt;
13465 else if ((info->shared || indx != 0)
13466 && (h == NULL
13467 || (tls_type == (TLS_TLS | TLS_LD)
13468 && !h->elf.def_dynamic)
13469 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13470 || h->elf.root.type != bfd_link_hash_undefweak))
13471 relgot = ppc64_elf_tdata (ent->owner)->relgot;
13472 if (relgot != NULL)
13473 {
13474 outrel.r_offset = (got->output_section->vma
13475 + got->output_offset
13476 + off);
13477 outrel.r_addend = addend;
13478 if (tls_type & (TLS_LD | TLS_GD))
13479 {
13480 outrel.r_addend = 0;
13481 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
13482 if (tls_type == (TLS_TLS | TLS_GD))
13483 {
13484 loc = relgot->contents;
13485 loc += (relgot->reloc_count++
13486 * sizeof (Elf64_External_Rela));
13487 bfd_elf64_swap_reloca_out (output_bfd,
13488 &outrel, loc);
13489 outrel.r_offset += 8;
13490 outrel.r_addend = addend;
13491 outrel.r_info
13492 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13493 }
13494 }
13495 else if (tls_type == (TLS_TLS | TLS_DTPREL))
13496 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
13497 else if (tls_type == (TLS_TLS | TLS_TPREL))
13498 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
13499 else if (indx != 0)
13500 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
13501 else
13502 {
13503 if (ifunc)
13504 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13505 else
13506 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13507
13508 /* Write the .got section contents for the sake
13509 of prelink. */
13510 loc = got->contents + off;
13511 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
13512 loc);
13513 }
13514
13515 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
13516 {
13517 outrel.r_addend += relocation;
13518 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
13519 outrel.r_addend -= htab->elf.tls_sec->vma;
13520 }
13521 loc = relgot->contents;
13522 loc += (relgot->reloc_count++
13523 * sizeof (Elf64_External_Rela));
13524 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13525 }
13526
13527 /* Init the .got section contents here if we're not
13528 emitting a reloc. */
13529 else
13530 {
13531 relocation += addend;
13532 if (tls_type == (TLS_TLS | TLS_LD))
13533 relocation = 1;
13534 else if (tls_type != 0)
13535 {
13536 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
13537 if (tls_type == (TLS_TLS | TLS_TPREL))
13538 relocation += DTP_OFFSET - TP_OFFSET;
13539
13540 if (tls_type == (TLS_TLS | TLS_GD))
13541 {
13542 bfd_put_64 (output_bfd, relocation,
13543 got->contents + off + 8);
13544 relocation = 1;
13545 }
13546 }
13547
13548 bfd_put_64 (output_bfd, relocation,
13549 got->contents + off);
13550 }
13551 }
13552
13553 if (off >= (bfd_vma) -2)
13554 abort ();
13555
13556 relocation = got->output_section->vma + got->output_offset + off;
13557 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
13558 }
13559 break;
13560
13561 case R_PPC64_PLT16_HA:
13562 case R_PPC64_PLT16_HI:
13563 case R_PPC64_PLT16_LO:
13564 case R_PPC64_PLT32:
13565 case R_PPC64_PLT64:
13566 /* Relocation is to the entry for this symbol in the
13567 procedure linkage table. */
13568
13569 /* Resolve a PLT reloc against a local symbol directly,
13570 without using the procedure linkage table. */
13571 if (h == NULL)
13572 break;
13573
13574 /* It's possible that we didn't make a PLT entry for this
13575 symbol. This happens when statically linking PIC code,
13576 or when using -Bsymbolic. Go find a match if there is a
13577 PLT entry. */
13578 if (htab->plt != NULL)
13579 {
13580 struct plt_entry *ent;
13581 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
13582 if (ent->addend == orig_rel.r_addend
13583 && ent->plt.offset != (bfd_vma) -1)
13584 {
13585 relocation = (htab->plt->output_section->vma
13586 + htab->plt->output_offset
13587 + ent->plt.offset);
13588 unresolved_reloc = FALSE;
13589 }
13590 }
13591 break;
13592
13593 case R_PPC64_TOC:
13594 /* Relocation value is TOC base. */
13595 relocation = TOCstart;
13596 if (r_symndx == STN_UNDEF)
13597 relocation += htab->stub_group[input_section->id].toc_off;
13598 else if (unresolved_reloc)
13599 ;
13600 else if (sec != NULL && sec->id <= htab->top_id)
13601 relocation += htab->stub_group[sec->id].toc_off;
13602 else
13603 unresolved_reloc = TRUE;
13604 goto dodyn;
13605
13606 /* TOC16 relocs. We want the offset relative to the TOC base,
13607 which is the address of the start of the TOC plus 0x8000.
13608 The TOC consists of sections .got, .toc, .tocbss, and .plt,
13609 in this order. */
13610 case R_PPC64_TOC16:
13611 case R_PPC64_TOC16_LO:
13612 case R_PPC64_TOC16_HI:
13613 case R_PPC64_TOC16_DS:
13614 case R_PPC64_TOC16_LO_DS:
13615 case R_PPC64_TOC16_HA:
13616 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
13617 break;
13618
13619 /* Relocate against the beginning of the section. */
13620 case R_PPC64_SECTOFF:
13621 case R_PPC64_SECTOFF_LO:
13622 case R_PPC64_SECTOFF_HI:
13623 case R_PPC64_SECTOFF_DS:
13624 case R_PPC64_SECTOFF_LO_DS:
13625 case R_PPC64_SECTOFF_HA:
13626 if (sec != NULL)
13627 addend -= sec->output_section->vma;
13628 break;
13629
13630 case R_PPC64_REL16:
13631 case R_PPC64_REL16_LO:
13632 case R_PPC64_REL16_HI:
13633 case R_PPC64_REL16_HA:
13634 break;
13635
13636 case R_PPC64_REL14:
13637 case R_PPC64_REL14_BRNTAKEN:
13638 case R_PPC64_REL14_BRTAKEN:
13639 case R_PPC64_REL24:
13640 break;
13641
13642 case R_PPC64_TPREL16:
13643 case R_PPC64_TPREL16_LO:
13644 case R_PPC64_TPREL16_HI:
13645 case R_PPC64_TPREL16_HA:
13646 case R_PPC64_TPREL16_DS:
13647 case R_PPC64_TPREL16_LO_DS:
13648 case R_PPC64_TPREL16_HIGH:
13649 case R_PPC64_TPREL16_HIGHA:
13650 case R_PPC64_TPREL16_HIGHER:
13651 case R_PPC64_TPREL16_HIGHERA:
13652 case R_PPC64_TPREL16_HIGHEST:
13653 case R_PPC64_TPREL16_HIGHESTA:
13654 if (h != NULL
13655 && h->elf.root.type == bfd_link_hash_undefweak
13656 && h->elf.dynindx == -1)
13657 {
13658 /* Make this relocation against an undefined weak symbol
13659 resolve to zero. This is really just a tweak, since
13660 code using weak externs ought to check that they are
13661 defined before using them. */
13662 bfd_byte *p = contents + rel->r_offset - d_offset;
13663
13664 insn = bfd_get_32 (output_bfd, p);
13665 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
13666 if (insn != 0)
13667 bfd_put_32 (output_bfd, insn, p);
13668 break;
13669 }
13670 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13671 if (info->shared)
13672 /* The TPREL16 relocs shouldn't really be used in shared
13673 libs as they will result in DT_TEXTREL being set, but
13674 support them anyway. */
13675 goto dodyn;
13676 break;
13677
13678 case R_PPC64_DTPREL16:
13679 case R_PPC64_DTPREL16_LO:
13680 case R_PPC64_DTPREL16_HI:
13681 case R_PPC64_DTPREL16_HA:
13682 case R_PPC64_DTPREL16_DS:
13683 case R_PPC64_DTPREL16_LO_DS:
13684 case R_PPC64_DTPREL16_HIGH:
13685 case R_PPC64_DTPREL16_HIGHA:
13686 case R_PPC64_DTPREL16_HIGHER:
13687 case R_PPC64_DTPREL16_HIGHERA:
13688 case R_PPC64_DTPREL16_HIGHEST:
13689 case R_PPC64_DTPREL16_HIGHESTA:
13690 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13691 break;
13692
13693 case R_PPC64_DTPMOD64:
13694 relocation = 1;
13695 addend = 0;
13696 goto dodyn;
13697
13698 case R_PPC64_TPREL64:
13699 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
13700 goto dodyn;
13701
13702 case R_PPC64_DTPREL64:
13703 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
13704 /* Fall thru */
13705
13706 /* Relocations that may need to be propagated if this is a
13707 dynamic object. */
13708 case R_PPC64_REL30:
13709 case R_PPC64_REL32:
13710 case R_PPC64_REL64:
13711 case R_PPC64_ADDR14:
13712 case R_PPC64_ADDR14_BRNTAKEN:
13713 case R_PPC64_ADDR14_BRTAKEN:
13714 case R_PPC64_ADDR16:
13715 case R_PPC64_ADDR16_DS:
13716 case R_PPC64_ADDR16_HA:
13717 case R_PPC64_ADDR16_HI:
13718 case R_PPC64_ADDR16_HIGH:
13719 case R_PPC64_ADDR16_HIGHA:
13720 case R_PPC64_ADDR16_HIGHER:
13721 case R_PPC64_ADDR16_HIGHERA:
13722 case R_PPC64_ADDR16_HIGHEST:
13723 case R_PPC64_ADDR16_HIGHESTA:
13724 case R_PPC64_ADDR16_LO:
13725 case R_PPC64_ADDR16_LO_DS:
13726 case R_PPC64_ADDR24:
13727 case R_PPC64_ADDR32:
13728 case R_PPC64_ADDR64:
13729 case R_PPC64_UADDR16:
13730 case R_PPC64_UADDR32:
13731 case R_PPC64_UADDR64:
13732 dodyn:
13733 if ((input_section->flags & SEC_ALLOC) == 0)
13734 break;
13735
13736 if (NO_OPD_RELOCS && is_opd)
13737 break;
13738
13739 if ((info->shared
13740 && (h == NULL
13741 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
13742 || h->elf.root.type != bfd_link_hash_undefweak)
13743 && (must_be_dyn_reloc (info, r_type)
13744 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
13745 || (ELIMINATE_COPY_RELOCS
13746 && !info->shared
13747 && h != NULL
13748 && h->elf.dynindx != -1
13749 && !h->elf.non_got_ref
13750 && !h->elf.def_regular)
13751 || (!info->shared
13752 && (h != NULL
13753 ? h->elf.type == STT_GNU_IFUNC
13754 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
13755 {
13756 bfd_boolean skip, relocate;
13757 asection *sreloc;
13758 bfd_vma out_off;
13759
13760 /* When generating a dynamic object, these relocations
13761 are copied into the output file to be resolved at run
13762 time. */
13763
13764 skip = FALSE;
13765 relocate = FALSE;
13766
13767 out_off = _bfd_elf_section_offset (output_bfd, info,
13768 input_section, rel->r_offset);
13769 if (out_off == (bfd_vma) -1)
13770 skip = TRUE;
13771 else if (out_off == (bfd_vma) -2)
13772 skip = TRUE, relocate = TRUE;
13773 out_off += (input_section->output_section->vma
13774 + input_section->output_offset);
13775 outrel.r_offset = out_off;
13776 outrel.r_addend = rel->r_addend;
13777
13778 /* Optimize unaligned reloc use. */
13779 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13780 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13781 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13782 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13783 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13784 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13785 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13786 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13787 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13788
13789 if (skip)
13790 memset (&outrel, 0, sizeof outrel);
13791 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13792 && !is_opd
13793 && r_type != R_PPC64_TOC)
13794 {
13795 BFD_ASSERT (h->elf.dynindx != -1);
13796 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13797 }
13798 else
13799 {
13800 /* This symbol is local, or marked to become local,
13801 or this is an opd section reloc which must point
13802 at a local function. */
13803 outrel.r_addend += relocation;
13804 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13805 {
13806 if (is_opd && h != NULL)
13807 {
13808 /* Lie about opd entries. This case occurs
13809 when building shared libraries and we
13810 reference a function in another shared
13811 lib. The same thing happens for a weak
13812 definition in an application that's
13813 overridden by a strong definition in a
13814 shared lib. (I believe this is a generic
13815 bug in binutils handling of weak syms.)
13816 In these cases we won't use the opd
13817 entry in this lib. */
13818 unresolved_reloc = FALSE;
13819 }
13820 if (!is_opd
13821 && r_type == R_PPC64_ADDR64
13822 && (h != NULL
13823 ? h->elf.type == STT_GNU_IFUNC
13824 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13825 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13826 else
13827 {
13828 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13829
13830 /* We need to relocate .opd contents for ld.so.
13831 Prelink also wants simple and consistent rules
13832 for relocs. This make all RELATIVE relocs have
13833 *r_offset equal to r_addend. */
13834 relocate = TRUE;
13835 }
13836 }
13837 else
13838 {
13839 long indx = 0;
13840
13841 if (h != NULL
13842 ? h->elf.type == STT_GNU_IFUNC
13843 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13844 {
13845 info->callbacks->einfo
13846 (_("%P: %H: %s for indirect "
13847 "function `%T' unsupported\n"),
13848 input_bfd, input_section, rel->r_offset,
13849 ppc64_elf_howto_table[r_type]->name,
13850 sym_name);
13851 ret = FALSE;
13852 }
13853 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13854 ;
13855 else if (sec == NULL || sec->owner == NULL)
13856 {
13857 bfd_set_error (bfd_error_bad_value);
13858 return FALSE;
13859 }
13860 else
13861 {
13862 asection *osec;
13863
13864 osec = sec->output_section;
13865 indx = elf_section_data (osec)->dynindx;
13866
13867 if (indx == 0)
13868 {
13869 if ((osec->flags & SEC_READONLY) == 0
13870 && htab->elf.data_index_section != NULL)
13871 osec = htab->elf.data_index_section;
13872 else
13873 osec = htab->elf.text_index_section;
13874 indx = elf_section_data (osec)->dynindx;
13875 }
13876 BFD_ASSERT (indx != 0);
13877
13878 /* We are turning this relocation into one
13879 against a section symbol, so subtract out
13880 the output section's address but not the
13881 offset of the input section in the output
13882 section. */
13883 outrel.r_addend -= osec->vma;
13884 }
13885
13886 outrel.r_info = ELF64_R_INFO (indx, r_type);
13887 }
13888 }
13889
13890 sreloc = elf_section_data (input_section)->sreloc;
13891 if (h != NULL
13892 ? h->elf.type == STT_GNU_IFUNC
13893 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13894 sreloc = htab->reliplt;
13895 if (sreloc == NULL)
13896 abort ();
13897
13898 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13899 >= sreloc->size)
13900 abort ();
13901 loc = sreloc->contents;
13902 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13903 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13904
13905 /* If this reloc is against an external symbol, it will
13906 be computed at runtime, so there's no need to do
13907 anything now. However, for the sake of prelink ensure
13908 that the section contents are a known value. */
13909 if (! relocate)
13910 {
13911 unresolved_reloc = FALSE;
13912 /* The value chosen here is quite arbitrary as ld.so
13913 ignores section contents except for the special
13914 case of .opd where the contents might be accessed
13915 before relocation. Choose zero, as that won't
13916 cause reloc overflow. */
13917 relocation = 0;
13918 addend = 0;
13919 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13920 to improve backward compatibility with older
13921 versions of ld. */
13922 if (r_type == R_PPC64_ADDR64)
13923 addend = outrel.r_addend;
13924 /* Adjust pc_relative relocs to have zero in *r_offset. */
13925 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13926 addend = (input_section->output_section->vma
13927 + input_section->output_offset
13928 + rel->r_offset);
13929 }
13930 }
13931 break;
13932
13933 case R_PPC64_COPY:
13934 case R_PPC64_GLOB_DAT:
13935 case R_PPC64_JMP_SLOT:
13936 case R_PPC64_JMP_IREL:
13937 case R_PPC64_RELATIVE:
13938 /* We shouldn't ever see these dynamic relocs in relocatable
13939 files. */
13940 /* Fall through. */
13941
13942 case R_PPC64_PLTGOT16:
13943 case R_PPC64_PLTGOT16_DS:
13944 case R_PPC64_PLTGOT16_HA:
13945 case R_PPC64_PLTGOT16_HI:
13946 case R_PPC64_PLTGOT16_LO:
13947 case R_PPC64_PLTGOT16_LO_DS:
13948 case R_PPC64_PLTREL32:
13949 case R_PPC64_PLTREL64:
13950 /* These ones haven't been implemented yet. */
13951
13952 info->callbacks->einfo
13953 (_("%P: %B: %s is not supported for `%T'\n"),
13954 input_bfd,
13955 ppc64_elf_howto_table[r_type]->name, sym_name);
13956
13957 bfd_set_error (bfd_error_invalid_operation);
13958 ret = FALSE;
13959 continue;
13960 }
13961
13962 /* Multi-instruction sequences that access the TOC can be
13963 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13964 to nop; addi rb,r2,x; */
13965 switch (r_type)
13966 {
13967 default:
13968 break;
13969
13970 case R_PPC64_GOT_TLSLD16_HI:
13971 case R_PPC64_GOT_TLSGD16_HI:
13972 case R_PPC64_GOT_TPREL16_HI:
13973 case R_PPC64_GOT_DTPREL16_HI:
13974 case R_PPC64_GOT16_HI:
13975 case R_PPC64_TOC16_HI:
13976 /* These relocs would only be useful if building up an
13977 offset to later add to r2, perhaps in an indexed
13978 addressing mode instruction. Don't try to optimize.
13979 Unfortunately, the possibility of someone building up an
13980 offset like this or even with the HA relocs, means that
13981 we need to check the high insn when optimizing the low
13982 insn. */
13983 break;
13984
13985 case R_PPC64_GOT_TLSLD16_HA:
13986 case R_PPC64_GOT_TLSGD16_HA:
13987 case R_PPC64_GOT_TPREL16_HA:
13988 case R_PPC64_GOT_DTPREL16_HA:
13989 case R_PPC64_GOT16_HA:
13990 case R_PPC64_TOC16_HA:
13991 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
13992 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
13993 {
13994 bfd_byte *p = contents + (rel->r_offset & ~3);
13995 bfd_put_32 (input_bfd, NOP, p);
13996 }
13997 break;
13998
13999 case R_PPC64_GOT_TLSLD16_LO:
14000 case R_PPC64_GOT_TLSGD16_LO:
14001 case R_PPC64_GOT_TPREL16_LO_DS:
14002 case R_PPC64_GOT_DTPREL16_LO_DS:
14003 case R_PPC64_GOT16_LO:
14004 case R_PPC64_GOT16_LO_DS:
14005 case R_PPC64_TOC16_LO:
14006 case R_PPC64_TOC16_LO_DS:
14007 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000
14008 && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn)
14009 {
14010 bfd_byte *p = contents + (rel->r_offset & ~3);
14011 insn = bfd_get_32 (input_bfd, p);
14012 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
14013 {
14014 /* Transform addic to addi when we change reg. */
14015 insn &= ~((0x3f << 26) | (0x1f << 16));
14016 insn |= (14u << 26) | (2 << 16);
14017 }
14018 else
14019 {
14020 insn &= ~(0x1f << 16);
14021 insn |= 2 << 16;
14022 }
14023 bfd_put_32 (input_bfd, insn, p);
14024 }
14025 break;
14026 }
14027
14028 /* Do any further special processing. */
14029 switch (r_type)
14030 {
14031 default:
14032 break;
14033
14034 case R_PPC64_REL16_HA:
14035 case R_PPC64_ADDR16_HA:
14036 case R_PPC64_ADDR16_HIGHA:
14037 case R_PPC64_ADDR16_HIGHERA:
14038 case R_PPC64_ADDR16_HIGHESTA:
14039 case R_PPC64_TOC16_HA:
14040 case R_PPC64_SECTOFF_HA:
14041 case R_PPC64_TPREL16_HA:
14042 case R_PPC64_TPREL16_HIGHA:
14043 case R_PPC64_TPREL16_HIGHERA:
14044 case R_PPC64_TPREL16_HIGHESTA:
14045 case R_PPC64_DTPREL16_HA:
14046 case R_PPC64_DTPREL16_HIGHA:
14047 case R_PPC64_DTPREL16_HIGHERA:
14048 case R_PPC64_DTPREL16_HIGHESTA:
14049 /* It's just possible that this symbol is a weak symbol
14050 that's not actually defined anywhere. In that case,
14051 'sec' would be NULL, and we should leave the symbol
14052 alone (it will be set to zero elsewhere in the link). */
14053 if (sec == NULL)
14054 break;
14055 /* Fall thru */
14056
14057 case R_PPC64_GOT16_HA:
14058 case R_PPC64_PLTGOT16_HA:
14059 case R_PPC64_PLT16_HA:
14060 case R_PPC64_GOT_TLSGD16_HA:
14061 case R_PPC64_GOT_TLSLD16_HA:
14062 case R_PPC64_GOT_TPREL16_HA:
14063 case R_PPC64_GOT_DTPREL16_HA:
14064 /* Add 0x10000 if sign bit in 0:15 is set.
14065 Bits 0:15 are not used. */
14066 addend += 0x8000;
14067 break;
14068
14069 case R_PPC64_ADDR16_DS:
14070 case R_PPC64_ADDR16_LO_DS:
14071 case R_PPC64_GOT16_DS:
14072 case R_PPC64_GOT16_LO_DS:
14073 case R_PPC64_PLT16_LO_DS:
14074 case R_PPC64_SECTOFF_DS:
14075 case R_PPC64_SECTOFF_LO_DS:
14076 case R_PPC64_TOC16_DS:
14077 case R_PPC64_TOC16_LO_DS:
14078 case R_PPC64_PLTGOT16_DS:
14079 case R_PPC64_PLTGOT16_LO_DS:
14080 case R_PPC64_GOT_TPREL16_DS:
14081 case R_PPC64_GOT_TPREL16_LO_DS:
14082 case R_PPC64_GOT_DTPREL16_DS:
14083 case R_PPC64_GOT_DTPREL16_LO_DS:
14084 case R_PPC64_TPREL16_DS:
14085 case R_PPC64_TPREL16_LO_DS:
14086 case R_PPC64_DTPREL16_DS:
14087 case R_PPC64_DTPREL16_LO_DS:
14088 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
14089 mask = 3;
14090 /* If this reloc is against an lq insn, then the value must be
14091 a multiple of 16. This is somewhat of a hack, but the
14092 "correct" way to do this by defining _DQ forms of all the
14093 _DS relocs bloats all reloc switches in this file. It
14094 doesn't seem to make much sense to use any of these relocs
14095 in data, so testing the insn should be safe. */
14096 if ((insn & (0x3f << 26)) == (56u << 26))
14097 mask = 15;
14098 if (((relocation + addend) & mask) != 0)
14099 {
14100 info->callbacks->einfo
14101 (_("%P: %H: error: %s not a multiple of %u\n"),
14102 input_bfd, input_section, rel->r_offset,
14103 ppc64_elf_howto_table[r_type]->name,
14104 mask + 1);
14105 bfd_set_error (bfd_error_bad_value);
14106 ret = FALSE;
14107 continue;
14108 }
14109 break;
14110 }
14111
14112 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
14113 because such sections are not SEC_ALLOC and thus ld.so will
14114 not process them. */
14115 if (unresolved_reloc
14116 && !((input_section->flags & SEC_DEBUGGING) != 0
14117 && h->elf.def_dynamic)
14118 && _bfd_elf_section_offset (output_bfd, info, input_section,
14119 rel->r_offset) != (bfd_vma) -1)
14120 {
14121 info->callbacks->einfo
14122 (_("%P: %H: unresolvable %s against `%T'\n"),
14123 input_bfd, input_section, rel->r_offset,
14124 ppc64_elf_howto_table[(int) r_type]->name,
14125 h->elf.root.root.string);
14126 ret = FALSE;
14127 }
14128
14129 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
14130 input_bfd,
14131 input_section,
14132 contents,
14133 rel->r_offset,
14134 relocation,
14135 addend);
14136
14137 if (r != bfd_reloc_ok)
14138 {
14139 char *more_info = NULL;
14140 const char *reloc_name = ppc64_elf_howto_table[r_type]->name;
14141
14142 if (reloc_dest != DEST_NORMAL)
14143 {
14144 more_info = bfd_malloc (strlen (reloc_name) + 8);
14145 if (more_info != NULL)
14146 {
14147 strcpy (more_info, reloc_name);
14148 strcat (more_info, (reloc_dest == DEST_OPD
14149 ? " (OPD)" : " (stub)"));
14150 reloc_name = more_info;
14151 }
14152 }
14153
14154 if (r == bfd_reloc_overflow)
14155 {
14156 if (warned)
14157 continue;
14158 if (h != NULL
14159 && h->elf.root.type == bfd_link_hash_undefweak
14160 && ppc64_elf_howto_table[r_type]->pc_relative)
14161 {
14162 /* Assume this is a call protected by other code that
14163 detects the symbol is undefined. If this is the case,
14164 we can safely ignore the overflow. If not, the
14165 program is hosed anyway, and a little warning isn't
14166 going to help. */
14167
14168 continue;
14169 }
14170
14171 if (!((*info->callbacks->reloc_overflow)
14172 (info, &h->elf.root, sym_name,
14173 reloc_name, orig_rel.r_addend,
14174 input_bfd, input_section, rel->r_offset)))
14175 return FALSE;
14176 }
14177 else
14178 {
14179 info->callbacks->einfo
14180 (_("%P: %H: %s against `%T': error %d\n"),
14181 input_bfd, input_section, rel->r_offset,
14182 reloc_name, sym_name, (int) r);
14183 ret = FALSE;
14184 }
14185 if (more_info != NULL)
14186 free (more_info);
14187 }
14188 }
14189
14190 /* If we're emitting relocations, then shortly after this function
14191 returns, reloc offsets and addends for this section will be
14192 adjusted. Worse, reloc symbol indices will be for the output
14193 file rather than the input. Save a copy of the relocs for
14194 opd_entry_value. */
14195 if (is_opd && (info->emitrelocations || info->relocatable))
14196 {
14197 bfd_size_type amt;
14198 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
14199 rel = bfd_alloc (input_bfd, amt);
14200 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL);
14201 ppc64_elf_tdata (input_bfd)->opd.relocs = rel;
14202 if (rel == NULL)
14203 return FALSE;
14204 memcpy (rel, relocs, amt);
14205 }
14206 return ret;
14207 }
14208
14209 /* Adjust the value of any local symbols in opd sections. */
14210
14211 static int
14212 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
14213 const char *name ATTRIBUTE_UNUSED,
14214 Elf_Internal_Sym *elfsym,
14215 asection *input_sec,
14216 struct elf_link_hash_entry *h)
14217 {
14218 struct _opd_sec_data *opd;
14219 long adjust;
14220 bfd_vma value;
14221
14222 if (h != NULL)
14223 return 1;
14224
14225 opd = get_opd_info (input_sec);
14226 if (opd == NULL || opd->adjust == NULL)
14227 return 1;
14228
14229 value = elfsym->st_value - input_sec->output_offset;
14230 if (!info->relocatable)
14231 value -= input_sec->output_section->vma;
14232
14233 adjust = opd->adjust[value / 8];
14234 if (adjust == -1)
14235 return 2;
14236
14237 elfsym->st_value += adjust;
14238 return 1;
14239 }
14240
14241 /* Finish up dynamic symbol handling. We set the contents of various
14242 dynamic sections here. */
14243
14244 static bfd_boolean
14245 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
14246 struct bfd_link_info *info,
14247 struct elf_link_hash_entry *h,
14248 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
14249 {
14250 struct ppc_link_hash_table *htab;
14251 struct plt_entry *ent;
14252 Elf_Internal_Rela rela;
14253 bfd_byte *loc;
14254
14255 htab = ppc_hash_table (info);
14256 if (htab == NULL)
14257 return FALSE;
14258
14259 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
14260 if (ent->plt.offset != (bfd_vma) -1)
14261 {
14262 /* This symbol has an entry in the procedure linkage
14263 table. Set it up. */
14264 if (!htab->elf.dynamic_sections_created
14265 || h->dynindx == -1)
14266 {
14267 BFD_ASSERT (h->type == STT_GNU_IFUNC
14268 && h->def_regular
14269 && (h->root.type == bfd_link_hash_defined
14270 || h->root.type == bfd_link_hash_defweak));
14271 rela.r_offset = (htab->iplt->output_section->vma
14272 + htab->iplt->output_offset
14273 + ent->plt.offset);
14274 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
14275 rela.r_addend = (h->root.u.def.value
14276 + h->root.u.def.section->output_offset
14277 + h->root.u.def.section->output_section->vma
14278 + ent->addend);
14279 loc = (htab->reliplt->contents
14280 + (htab->reliplt->reloc_count++
14281 * sizeof (Elf64_External_Rela)));
14282 }
14283 else
14284 {
14285 rela.r_offset = (htab->plt->output_section->vma
14286 + htab->plt->output_offset
14287 + ent->plt.offset);
14288 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
14289 rela.r_addend = ent->addend;
14290 loc = (htab->relplt->contents
14291 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
14292 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
14293 }
14294 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14295 }
14296
14297 if (h->needs_copy)
14298 {
14299 /* This symbol needs a copy reloc. Set it up. */
14300
14301 if (h->dynindx == -1
14302 || (h->root.type != bfd_link_hash_defined
14303 && h->root.type != bfd_link_hash_defweak)
14304 || htab->relbss == NULL)
14305 abort ();
14306
14307 rela.r_offset = (h->root.u.def.value
14308 + h->root.u.def.section->output_section->vma
14309 + h->root.u.def.section->output_offset);
14310 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
14311 rela.r_addend = 0;
14312 loc = htab->relbss->contents;
14313 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
14314 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
14315 }
14316
14317 return TRUE;
14318 }
14319
14320 /* Used to decide how to sort relocs in an optimal manner for the
14321 dynamic linker, before writing them out. */
14322
14323 static enum elf_reloc_type_class
14324 ppc64_elf_reloc_type_class (const struct bfd_link_info *info,
14325 const asection *rel_sec,
14326 const Elf_Internal_Rela *rela)
14327 {
14328 enum elf_ppc64_reloc_type r_type;
14329 struct ppc_link_hash_table *htab = ppc_hash_table (info);
14330
14331 if (rel_sec == htab->reliplt)
14332 return reloc_class_ifunc;
14333
14334 r_type = ELF64_R_TYPE (rela->r_info);
14335 switch (r_type)
14336 {
14337 case R_PPC64_RELATIVE:
14338 return reloc_class_relative;
14339 case R_PPC64_JMP_SLOT:
14340 return reloc_class_plt;
14341 case R_PPC64_COPY:
14342 return reloc_class_copy;
14343 default:
14344 return reloc_class_normal;
14345 }
14346 }
14347
14348 /* Finish up the dynamic sections. */
14349
14350 static bfd_boolean
14351 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
14352 struct bfd_link_info *info)
14353 {
14354 struct ppc_link_hash_table *htab;
14355 bfd *dynobj;
14356 asection *sdyn;
14357
14358 htab = ppc_hash_table (info);
14359 if (htab == NULL)
14360 return FALSE;
14361
14362 dynobj = htab->elf.dynobj;
14363 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
14364
14365 if (htab->elf.dynamic_sections_created)
14366 {
14367 Elf64_External_Dyn *dyncon, *dynconend;
14368
14369 if (sdyn == NULL || htab->got == NULL)
14370 abort ();
14371
14372 dyncon = (Elf64_External_Dyn *) sdyn->contents;
14373 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
14374 for (; dyncon < dynconend; dyncon++)
14375 {
14376 Elf_Internal_Dyn dyn;
14377 asection *s;
14378
14379 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
14380
14381 switch (dyn.d_tag)
14382 {
14383 default:
14384 continue;
14385
14386 case DT_PPC64_GLINK:
14387 s = htab->glink;
14388 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14389 /* We stupidly defined DT_PPC64_GLINK to be the start
14390 of glink rather than the first entry point, which is
14391 what ld.so needs, and now have a bigger stub to
14392 support automatic multiple TOCs. */
14393 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
14394 break;
14395
14396 case DT_PPC64_OPD:
14397 s = bfd_get_section_by_name (output_bfd, ".opd");
14398 if (s == NULL)
14399 continue;
14400 dyn.d_un.d_ptr = s->vma;
14401 break;
14402
14403 case DT_PPC64_OPDSZ:
14404 s = bfd_get_section_by_name (output_bfd, ".opd");
14405 if (s == NULL)
14406 continue;
14407 dyn.d_un.d_val = s->size;
14408 break;
14409
14410 case DT_PLTGOT:
14411 s = htab->plt;
14412 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14413 break;
14414
14415 case DT_JMPREL:
14416 s = htab->relplt;
14417 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
14418 break;
14419
14420 case DT_PLTRELSZ:
14421 dyn.d_un.d_val = htab->relplt->size;
14422 break;
14423
14424 case DT_RELASZ:
14425 /* Don't count procedure linkage table relocs in the
14426 overall reloc count. */
14427 s = htab->relplt;
14428 if (s == NULL)
14429 continue;
14430 dyn.d_un.d_val -= s->size;
14431 break;
14432
14433 case DT_RELA:
14434 /* We may not be using the standard ELF linker script.
14435 If .rela.plt is the first .rela section, we adjust
14436 DT_RELA to not include it. */
14437 s = htab->relplt;
14438 if (s == NULL)
14439 continue;
14440 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
14441 continue;
14442 dyn.d_un.d_ptr += s->size;
14443 break;
14444 }
14445
14446 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
14447 }
14448 }
14449
14450 if (htab->got != NULL && htab->got->size != 0)
14451 {
14452 /* Fill in the first entry in the global offset table.
14453 We use it to hold the link-time TOCbase. */
14454 bfd_put_64 (output_bfd,
14455 elf_gp (output_bfd) + TOC_BASE_OFF,
14456 htab->got->contents);
14457
14458 /* Set .got entry size. */
14459 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
14460 }
14461
14462 if (htab->plt != NULL && htab->plt->size != 0)
14463 {
14464 /* Set .plt entry size. */
14465 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
14466 = PLT_ENTRY_SIZE;
14467 }
14468
14469 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
14470 brlt ourselves if emitrelocations. */
14471 if (htab->brlt != NULL
14472 && htab->brlt->reloc_count != 0
14473 && !_bfd_elf_link_output_relocs (output_bfd,
14474 htab->brlt,
14475 elf_section_data (htab->brlt)->rela.hdr,
14476 elf_section_data (htab->brlt)->relocs,
14477 NULL))
14478 return FALSE;
14479
14480 if (htab->glink != NULL
14481 && htab->glink->reloc_count != 0
14482 && !_bfd_elf_link_output_relocs (output_bfd,
14483 htab->glink,
14484 elf_section_data (htab->glink)->rela.hdr,
14485 elf_section_data (htab->glink)->relocs,
14486 NULL))
14487 return FALSE;
14488
14489
14490 if (htab->glink_eh_frame != NULL
14491 && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
14492 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
14493 htab->glink_eh_frame,
14494 htab->glink_eh_frame->contents))
14495 return FALSE;
14496
14497 /* We need to handle writing out multiple GOT sections ourselves,
14498 since we didn't add them to DYNOBJ. We know dynobj is the first
14499 bfd. */
14500 while ((dynobj = dynobj->link_next) != NULL)
14501 {
14502 asection *s;
14503
14504 if (!is_ppc64_elf (dynobj))
14505 continue;
14506
14507 s = ppc64_elf_tdata (dynobj)->got;
14508 if (s != NULL
14509 && s->size != 0
14510 && s->output_section != bfd_abs_section_ptr
14511 && !bfd_set_section_contents (output_bfd, s->output_section,
14512 s->contents, s->output_offset,
14513 s->size))
14514 return FALSE;
14515 s = ppc64_elf_tdata (dynobj)->relgot;
14516 if (s != NULL
14517 && s->size != 0
14518 && s->output_section != bfd_abs_section_ptr
14519 && !bfd_set_section_contents (output_bfd, s->output_section,
14520 s->contents, s->output_offset,
14521 s->size))
14522 return FALSE;
14523 }
14524
14525 return TRUE;
14526 }
14527
14528 #include "elf64-target.h"
14529
14530 /* FreeBSD support */
14531
14532 #undef TARGET_LITTLE_SYM
14533 #undef TARGET_LITTLE_NAME
14534
14535 #undef TARGET_BIG_SYM
14536 #define TARGET_BIG_SYM bfd_elf64_powerpc_freebsd_vec
14537 #undef TARGET_BIG_NAME
14538 #define TARGET_BIG_NAME "elf64-powerpc-freebsd"
14539
14540 #undef ELF_OSABI
14541 #define ELF_OSABI ELFOSABI_FREEBSD
14542
14543 #undef elf64_bed
14544 #define elf64_bed elf64_powerpc_fbsd_bed
14545
14546 #include "elf64-target.h"
14547
GDB Binutils - Deliverables
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