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[thirdparty/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37
38 static bfd_reloc_status_type ppc64_elf_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc64_elf_branch_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48 static bfd_reloc_status_type ppc64_elf_toc_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc64_elf_toc64_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_vma opd_entry_value
57 (asection *, bfd_vma, asection **, bfd_vma *);
58
59 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
60 #define TARGET_LITTLE_NAME "elf64-powerpcle"
61 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
62 #define TARGET_BIG_NAME "elf64-powerpc"
63 #define ELF_ARCH bfd_arch_powerpc
64 #define ELF_TARGET_ID PPC64_ELF_DATA
65 #define ELF_MACHINE_CODE EM_PPC64
66 #define ELF_MAXPAGESIZE 0x10000
67 #define ELF_COMMONPAGESIZE 0x1000
68 #define elf_info_to_howto ppc64_elf_info_to_howto
69
70 #define elf_backend_want_got_sym 0
71 #define elf_backend_want_plt_sym 0
72 #define elf_backend_plt_alignment 3
73 #define elf_backend_plt_not_loaded 1
74 #define elf_backend_got_header_size 8
75 #define elf_backend_can_gc_sections 1
76 #define elf_backend_can_refcount 1
77 #define elf_backend_rela_normal 1
78 #define elf_backend_default_execstack 0
79
80 #define bfd_elf64_mkobject ppc64_elf_mkobject
81 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
82 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
83 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
84 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
85 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
86 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
87 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
88
89 #define elf_backend_object_p ppc64_elf_object_p
90 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
91 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
92 #define elf_backend_write_core_note ppc64_elf_write_core_note
93 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
94 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
95 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
96 #define elf_backend_check_directives ppc64_elf_process_dot_syms
97 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
98 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
99 #define elf_backend_check_relocs ppc64_elf_check_relocs
100 #define elf_backend_gc_keep ppc64_elf_gc_keep
101 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
102 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
103 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
104 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
105 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
106 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
107 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
108 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
109 #define elf_backend_action_discarded ppc64_elf_action_discarded
110 #define elf_backend_relocate_section ppc64_elf_relocate_section
111 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
112 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
113 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
114 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
115 #define elf_backend_special_sections ppc64_elf_special_sections
116 #define elf_backend_post_process_headers _bfd_elf_set_osabi
117
118 /* The name of the dynamic interpreter. This is put in the .interp
119 section. */
120 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
121
122 /* The size in bytes of an entry in the procedure linkage table. */
123 #define PLT_ENTRY_SIZE 24
124
125 /* The initial size of the plt reserved for the dynamic linker. */
126 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
127
128 /* TOC base pointers offset from start of TOC. */
129 #define TOC_BASE_OFF 0x8000
130
131 /* Offset of tp and dtp pointers from start of TLS block. */
132 #define TP_OFFSET 0x7000
133 #define DTP_OFFSET 0x8000
134
135 /* .plt call stub instructions. The normal stub is like this, but
136 sometimes the .plt entry crosses a 64k boundary and we need to
137 insert an addi to adjust r12. */
138 #define PLT_CALL_STUB_SIZE (7*4)
139 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
140 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
141 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
142 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
143 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
144 /* ld %r11,xxx+16@l(%r12) */
145 #define BCTR 0x4e800420 /* bctr */
146
147
148 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
149 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
150 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
151 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
152
153 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
154 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
155
156 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
157
158 /* glink call stub instructions. We enter with the index in R0. */
159 #define GLINK_CALL_STUB_SIZE (16*4)
160 /* 0: */
161 /* .quad plt0-1f */
162 /* __glink: */
163 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
164 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
165 /* 1: */
166 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
167 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
168 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
169 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
170 /* ld %11,0(%12) */
171 /* ld %2,8(%12) */
172 /* mtctr %11 */
173 /* ld %11,16(%12) */
174 /* bctr */
175
176 /* Pad with this. */
177 #define NOP 0x60000000
178
179 /* Some other nops. */
180 #define CROR_151515 0x4def7b82
181 #define CROR_313131 0x4ffffb82
182
183 /* .glink entries for the first 32k functions are two instructions. */
184 #define LI_R0_0 0x38000000 /* li %r0,0 */
185 #define B_DOT 0x48000000 /* b . */
186
187 /* After that, we need two instructions to load the index, followed by
188 a branch. */
189 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
190 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
191
192 /* Instructions used by the save and restore reg functions. */
193 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
194 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
195 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
196 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
197 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
198 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
199 #define LI_R12_0 0x39800000 /* li %r12,0 */
200 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
201 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
202 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
203 #define BLR 0x4e800020 /* blr */
204
205 /* Since .opd is an array of descriptors and each entry will end up
206 with identical R_PPC64_RELATIVE relocs, there is really no need to
207 propagate .opd relocs; The dynamic linker should be taught to
208 relocate .opd without reloc entries. */
209 #ifndef NO_OPD_RELOCS
210 #define NO_OPD_RELOCS 0
211 #endif
212 \f
213 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
214
215 /* Relocation HOWTO's. */
216 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
217
218 static reloc_howto_type ppc64_elf_howto_raw[] = {
219 /* This reloc does nothing. */
220 HOWTO (R_PPC64_NONE, /* type */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_dont, /* complain_on_overflow */
227 bfd_elf_generic_reloc, /* special_function */
228 "R_PPC64_NONE", /* name */
229 FALSE, /* partial_inplace */
230 0, /* src_mask */
231 0, /* dst_mask */
232 FALSE), /* pcrel_offset */
233
234 /* A standard 32 bit relocation. */
235 HOWTO (R_PPC64_ADDR32, /* type */
236 0, /* rightshift */
237 2, /* size (0 = byte, 1 = short, 2 = long) */
238 32, /* bitsize */
239 FALSE, /* pc_relative */
240 0, /* bitpos */
241 complain_overflow_bitfield, /* complain_on_overflow */
242 bfd_elf_generic_reloc, /* special_function */
243 "R_PPC64_ADDR32", /* name */
244 FALSE, /* partial_inplace */
245 0, /* src_mask */
246 0xffffffff, /* dst_mask */
247 FALSE), /* pcrel_offset */
248
249 /* An absolute 26 bit branch; the lower two bits must be zero.
250 FIXME: we don't check that, we just clear them. */
251 HOWTO (R_PPC64_ADDR24, /* type */
252 0, /* rightshift */
253 2, /* size (0 = byte, 1 = short, 2 = long) */
254 26, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_bitfield, /* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC64_ADDR24", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0x03fffffc, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* A standard 16 bit relocation. */
266 HOWTO (R_PPC64_ADDR16, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_bitfield, /* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC64_ADDR16", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* A 16 bit relocation without overflow. */
281 HOWTO (R_PPC64_ADDR16_LO, /* type */
282 0, /* rightshift */
283 1, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont,/* complain_on_overflow */
288 bfd_elf_generic_reloc, /* special_function */
289 "R_PPC64_ADDR16_LO", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0xffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* Bits 16-31 of an address. */
296 HOWTO (R_PPC64_ADDR16_HI, /* type */
297 16, /* rightshift */
298 1, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_dont, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC64_ADDR16_HI", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xffff, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
311 bits, treated as a signed number, is negative. */
312 HOWTO (R_PPC64_ADDR16_HA, /* type */
313 16, /* rightshift */
314 1, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_dont, /* complain_on_overflow */
319 ppc64_elf_ha_reloc, /* special_function */
320 "R_PPC64_ADDR16_HA", /* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0xffff, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch; the lower two bits must be zero.
327 FIXME: we don't check that, we just clear them. */
328 HOWTO (R_PPC64_ADDR14, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 16, /* bitsize */
332 FALSE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_bitfield, /* complain_on_overflow */
335 ppc64_elf_branch_reloc, /* special_function */
336 "R_PPC64_ADDR14", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x0000fffc, /* dst_mask */
340 FALSE), /* pcrel_offset */
341
342 /* An absolute 16 bit branch, for which bit 10 should be set to
343 indicate that the branch is expected to be taken. The lower two
344 bits must be zero. */
345 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 16, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_bitfield, /* complain_on_overflow */
352 ppc64_elf_brtaken_reloc, /* special_function */
353 "R_PPC64_ADDR14_BRTAKEN",/* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x0000fffc, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* An absolute 16 bit branch, for which bit 10 should be set to
360 indicate that the branch is not expected to be taken. The lower
361 two bits must be zero. */
362 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 16, /* bitsize */
366 FALSE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_bitfield, /* complain_on_overflow */
369 ppc64_elf_brtaken_reloc, /* special_function */
370 "R_PPC64_ADDR14_BRNTAKEN",/* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x0000fffc, /* dst_mask */
374 FALSE), /* pcrel_offset */
375
376 /* A relative 26 bit branch; the lower two bits must be zero. */
377 HOWTO (R_PPC64_REL24, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 26, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 ppc64_elf_branch_reloc, /* special_function */
385 "R_PPC64_REL24", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0x03fffffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch; the lower two bits must be zero. */
392 HOWTO (R_PPC64_REL14, /* type */
393 0, /* rightshift */
394 2, /* size (0 = byte, 1 = short, 2 = long) */
395 16, /* bitsize */
396 TRUE, /* pc_relative */
397 0, /* bitpos */
398 complain_overflow_signed, /* complain_on_overflow */
399 ppc64_elf_branch_reloc, /* special_function */
400 "R_PPC64_REL14", /* name */
401 FALSE, /* partial_inplace */
402 0, /* src_mask */
403 0x0000fffc, /* dst_mask */
404 TRUE), /* pcrel_offset */
405
406 /* A relative 16 bit branch. Bit 10 should be set to indicate that
407 the branch is expected to be taken. The lower two bits must be
408 zero. */
409 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
410 0, /* rightshift */
411 2, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 TRUE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 ppc64_elf_brtaken_reloc, /* special_function */
417 "R_PPC64_REL14_BRTAKEN", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0x0000fffc, /* dst_mask */
421 TRUE), /* pcrel_offset */
422
423 /* A relative 16 bit branch. Bit 10 should be set to indicate that
424 the branch is not expected to be taken. The lower two bits must
425 be zero. */
426 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 TRUE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_signed, /* complain_on_overflow */
433 ppc64_elf_brtaken_reloc, /* special_function */
434 "R_PPC64_REL14_BRNTAKEN",/* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0x0000fffc, /* dst_mask */
438 TRUE), /* pcrel_offset */
439
440 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
441 symbol. */
442 HOWTO (R_PPC64_GOT16, /* type */
443 0, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_signed, /* complain_on_overflow */
449 ppc64_elf_unhandled_reloc, /* special_function */
450 "R_PPC64_GOT16", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC64_GOT16_LO, /* type */
459 0, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc64_elf_unhandled_reloc, /* special_function */
466 "R_PPC64_GOT16_LO", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
473 the symbol. */
474 HOWTO (R_PPC64_GOT16_HI, /* type */
475 16, /* rightshift */
476 1, /* size (0 = byte, 1 = short, 2 = long) */
477 16, /* bitsize */
478 FALSE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_dont,/* complain_on_overflow */
481 ppc64_elf_unhandled_reloc, /* special_function */
482 "R_PPC64_GOT16_HI", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0xffff, /* dst_mask */
486 FALSE), /* pcrel_offset */
487
488 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
489 the symbol. */
490 HOWTO (R_PPC64_GOT16_HA, /* type */
491 16, /* rightshift */
492 1, /* size (0 = byte, 1 = short, 2 = long) */
493 16, /* bitsize */
494 FALSE, /* pc_relative */
495 0, /* bitpos */
496 complain_overflow_dont,/* complain_on_overflow */
497 ppc64_elf_unhandled_reloc, /* special_function */
498 "R_PPC64_GOT16_HA", /* name */
499 FALSE, /* partial_inplace */
500 0, /* src_mask */
501 0xffff, /* dst_mask */
502 FALSE), /* pcrel_offset */
503
504 /* This is used only by the dynamic linker. The symbol should exist
505 both in the object being run and in some shared library. The
506 dynamic linker copies the data addressed by the symbol from the
507 shared library into the object, because the object being
508 run has to have the data at some particular address. */
509 HOWTO (R_PPC64_COPY, /* type */
510 0, /* rightshift */
511 0, /* this one is variable size */
512 0, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc64_elf_unhandled_reloc, /* special_function */
517 "R_PPC64_COPY", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Like R_PPC64_ADDR64, but used when setting global offset table
524 entries. */
525 HOWTO (R_PPC64_GLOB_DAT, /* type */
526 0, /* rightshift */
527 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
528 64, /* bitsize */
529 FALSE, /* pc_relative */
530 0, /* bitpos */
531 complain_overflow_dont, /* complain_on_overflow */
532 ppc64_elf_unhandled_reloc, /* special_function */
533 "R_PPC64_GLOB_DAT", /* name */
534 FALSE, /* partial_inplace */
535 0, /* src_mask */
536 ONES (64), /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 /* Created by the link editor. Marks a procedure linkage table
540 entry for a symbol. */
541 HOWTO (R_PPC64_JMP_SLOT, /* type */
542 0, /* rightshift */
543 0, /* size (0 = byte, 1 = short, 2 = long) */
544 0, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 ppc64_elf_unhandled_reloc, /* special_function */
549 "R_PPC64_JMP_SLOT", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Used only by the dynamic linker. When the object is run, this
556 doubleword64 is set to the load address of the object, plus the
557 addend. */
558 HOWTO (R_PPC64_RELATIVE, /* type */
559 0, /* rightshift */
560 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
561 64, /* bitsize */
562 FALSE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC64_RELATIVE", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 ONES (64), /* dst_mask */
570 FALSE), /* pcrel_offset */
571
572 /* Like R_PPC64_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC64_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_bitfield, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC64_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC64_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC64_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC64_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative. */
603 HOWTO (R_PPC64_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 /* FIXME: Verify. Was complain_overflow_bitfield. */
610 complain_overflow_signed, /* complain_on_overflow */
611 bfd_elf_generic_reloc, /* special_function */
612 "R_PPC64_REL32", /* name */
613 FALSE, /* partial_inplace */
614 0, /* src_mask */
615 0xffffffff, /* dst_mask */
616 TRUE), /* pcrel_offset */
617
618 /* 32-bit relocation to the symbol's procedure linkage table. */
619 HOWTO (R_PPC64_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_bitfield, /* complain_on_overflow */
626 ppc64_elf_unhandled_reloc, /* special_function */
627 "R_PPC64_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0xffffffff, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: R_PPC64_PLTREL32 not supported. */
635 HOWTO (R_PPC64_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_signed, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC64_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0xffffffff, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC64_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc64_elf_unhandled_reloc, /* special_function */
659 "R_PPC64_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC64_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc64_elf_unhandled_reloc, /* special_function */
675 "R_PPC64_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC64_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc64_elf_unhandled_reloc, /* special_function */
691 "R_PPC64_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* 16-bit section relative relocation. */
698 HOWTO (R_PPC64_SECTOFF, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_bitfield, /* complain_on_overflow */
705 ppc64_elf_sectoff_reloc, /* special_function */
706 "R_PPC64_SECTOFF", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* Like R_PPC64_SECTOFF, but no overflow warning. */
713 HOWTO (R_PPC64_SECTOFF_LO, /* type */
714 0, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_dont, /* complain_on_overflow */
720 ppc64_elf_sectoff_reloc, /* special_function */
721 "R_PPC64_SECTOFF_LO", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit upper half section relative relocation. */
728 HOWTO (R_PPC64_SECTOFF_HI, /* type */
729 16, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc64_elf_sectoff_reloc, /* special_function */
736 "R_PPC64_SECTOFF_HI", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* 16-bit upper half adjusted section relative relocation. */
743 HOWTO (R_PPC64_SECTOFF_HA, /* type */
744 16, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 ppc64_elf_sectoff_ha_reloc, /* special_function */
751 "R_PPC64_SECTOFF_HA", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* Like R_PPC64_REL24 without touching the two least significant bits. */
758 HOWTO (R_PPC64_REL30, /* type */
759 2, /* rightshift */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
761 30, /* bitsize */
762 TRUE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_dont, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_PPC64_REL30", /* name */
767 FALSE, /* partial_inplace */
768 0, /* src_mask */
769 0xfffffffc, /* dst_mask */
770 TRUE), /* pcrel_offset */
771
772 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
773
774 /* A standard 64-bit relocation. */
775 HOWTO (R_PPC64_ADDR64, /* type */
776 0, /* rightshift */
777 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
778 64, /* bitsize */
779 FALSE, /* pc_relative */
780 0, /* bitpos */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_PPC64_ADDR64", /* name */
784 FALSE, /* partial_inplace */
785 0, /* src_mask */
786 ONES (64), /* dst_mask */
787 FALSE), /* pcrel_offset */
788
789 /* The bits 32-47 of an address. */
790 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
791 32, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_PPC64_ADDR16_HIGHER", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The bits 32-47 of an address, plus 1 if the contents of the low
805 16 bits, treated as a signed number, is negative. */
806 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
807 32, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 ppc64_elf_ha_reloc, /* special_function */
814 "R_PPC64_ADDR16_HIGHERA", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The bits 48-63 of an address. */
821 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
822 48, /* rightshift */
823 1, /* size (0 = byte, 1 = short, 2 = long) */
824 16, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_PPC64_ADDR16_HIGHEST", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 0xffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* The bits 48-63 of an address, plus 1 if the contents of the low
836 16 bits, treated as a signed number, is negative. */
837 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
838 48, /* rightshift */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
840 16, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 ppc64_elf_ha_reloc, /* special_function */
845 "R_PPC64_ADDR16_HIGHESTA", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* Like ADDR64, but may be unaligned. */
852 HOWTO (R_PPC64_UADDR64, /* type */
853 0, /* rightshift */
854 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
855 64, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 "R_PPC64_UADDR64", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 ONES (64), /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* 64-bit relative relocation. */
867 HOWTO (R_PPC64_REL64, /* type */
868 0, /* rightshift */
869 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
870 64, /* bitsize */
871 TRUE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 bfd_elf_generic_reloc, /* special_function */
875 "R_PPC64_REL64", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 ONES (64), /* dst_mask */
879 TRUE), /* pcrel_offset */
880
881 /* 64-bit relocation to the symbol's procedure linkage table. */
882 HOWTO (R_PPC64_PLT64, /* type */
883 0, /* rightshift */
884 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
885 64, /* bitsize */
886 FALSE, /* pc_relative */
887 0, /* bitpos */
888 complain_overflow_dont, /* complain_on_overflow */
889 ppc64_elf_unhandled_reloc, /* special_function */
890 "R_PPC64_PLT64", /* name */
891 FALSE, /* partial_inplace */
892 0, /* src_mask */
893 ONES (64), /* dst_mask */
894 FALSE), /* pcrel_offset */
895
896 /* 64-bit PC relative relocation to the symbol's procedure linkage
897 table. */
898 /* FIXME: R_PPC64_PLTREL64 not supported. */
899 HOWTO (R_PPC64_PLTREL64, /* type */
900 0, /* rightshift */
901 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
902 64, /* bitsize */
903 TRUE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc64_elf_unhandled_reloc, /* special_function */
907 "R_PPC64_PLTREL64", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 ONES (64), /* dst_mask */
911 TRUE), /* pcrel_offset */
912
913 /* 16 bit TOC-relative relocation. */
914
915 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
916 HOWTO (R_PPC64_TOC16, /* type */
917 0, /* rightshift */
918 1, /* size (0 = byte, 1 = short, 2 = long) */
919 16, /* bitsize */
920 FALSE, /* pc_relative */
921 0, /* bitpos */
922 complain_overflow_signed, /* complain_on_overflow */
923 ppc64_elf_toc_reloc, /* special_function */
924 "R_PPC64_TOC16", /* name */
925 FALSE, /* partial_inplace */
926 0, /* src_mask */
927 0xffff, /* dst_mask */
928 FALSE), /* pcrel_offset */
929
930 /* 16 bit TOC-relative relocation without overflow. */
931
932 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
933 HOWTO (R_PPC64_TOC16_LO, /* type */
934 0, /* rightshift */
935 1, /* size (0 = byte, 1 = short, 2 = long) */
936 16, /* bitsize */
937 FALSE, /* pc_relative */
938 0, /* bitpos */
939 complain_overflow_dont, /* complain_on_overflow */
940 ppc64_elf_toc_reloc, /* special_function */
941 "R_PPC64_TOC16_LO", /* name */
942 FALSE, /* partial_inplace */
943 0, /* src_mask */
944 0xffff, /* dst_mask */
945 FALSE), /* pcrel_offset */
946
947 /* 16 bit TOC-relative relocation, high 16 bits. */
948
949 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
950 HOWTO (R_PPC64_TOC16_HI, /* type */
951 16, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc64_elf_toc_reloc, /* special_function */
958 "R_PPC64_TOC16_HI", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
965 contents of the low 16 bits, treated as a signed number, is
966 negative. */
967
968 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
969 HOWTO (R_PPC64_TOC16_HA, /* type */
970 16, /* rightshift */
971 1, /* size (0 = byte, 1 = short, 2 = long) */
972 16, /* bitsize */
973 FALSE, /* pc_relative */
974 0, /* bitpos */
975 complain_overflow_dont, /* complain_on_overflow */
976 ppc64_elf_toc_ha_reloc, /* special_function */
977 "R_PPC64_TOC16_HA", /* name */
978 FALSE, /* partial_inplace */
979 0, /* src_mask */
980 0xffff, /* dst_mask */
981 FALSE), /* pcrel_offset */
982
983 /* 64-bit relocation; insert value of TOC base (.TOC.). */
984
985 /* R_PPC64_TOC 51 doubleword64 .TOC. */
986 HOWTO (R_PPC64_TOC, /* type */
987 0, /* rightshift */
988 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
989 64, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_bitfield, /* complain_on_overflow */
993 ppc64_elf_toc64_reloc, /* special_function */
994 "R_PPC64_TOC", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 ONES (64), /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like R_PPC64_GOT16, but also informs the link editor that the
1001 value to relocate may (!) refer to a PLT entry which the link
1002 editor (a) may replace with the symbol value. If the link editor
1003 is unable to fully resolve the symbol, it may (b) create a PLT
1004 entry and store the address to the new PLT entry in the GOT.
1005 This permits lazy resolution of function symbols at run time.
1006 The link editor may also skip all of this and just (c) emit a
1007 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1008 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1009 HOWTO (R_PPC64_PLTGOT16, /* type */
1010 0, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_signed, /* complain_on_overflow */
1016 ppc64_elf_unhandled_reloc, /* special_function */
1017 "R_PPC64_PLTGOT16", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Like R_PPC64_PLTGOT16, but without overflow. */
1024 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1025 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1026 0, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont, /* complain_on_overflow */
1032 ppc64_elf_unhandled_reloc, /* special_function */
1033 "R_PPC64_PLTGOT16_LO", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1040 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1041 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1042 16, /* rightshift */
1043 1, /* size (0 = byte, 1 = short, 2 = long) */
1044 16, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_dont, /* complain_on_overflow */
1048 ppc64_elf_unhandled_reloc, /* special_function */
1049 "R_PPC64_PLTGOT16_HI", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0xffff, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1056 1 if the contents of the low 16 bits, treated as a signed number,
1057 is negative. */
1058 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1059 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1060 16, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_dont,/* complain_on_overflow */
1066 ppc64_elf_unhandled_reloc, /* special_function */
1067 "R_PPC64_PLTGOT16_HA", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xffff, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1074 HOWTO (R_PPC64_ADDR16_DS, /* type */
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_bitfield, /* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 "R_PPC64_ADDR16_DS", /* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xfffc, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1089 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1090 0, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_dont,/* complain_on_overflow */
1096 bfd_elf_generic_reloc, /* special_function */
1097 "R_PPC64_ADDR16_LO_DS",/* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xfffc, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1104 HOWTO (R_PPC64_GOT16_DS, /* type */
1105 0, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_signed, /* complain_on_overflow */
1111 ppc64_elf_unhandled_reloc, /* special_function */
1112 "R_PPC64_GOT16_DS", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xfffc, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1119 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_dont, /* complain_on_overflow */
1126 ppc64_elf_unhandled_reloc, /* special_function */
1127 "R_PPC64_GOT16_LO_DS", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xfffc, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1134 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc64_elf_unhandled_reloc, /* special_function */
1142 "R_PPC64_PLT16_LO_DS", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xfffc, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1149 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1150 0, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_bitfield, /* complain_on_overflow */
1156 ppc64_elf_sectoff_reloc, /* special_function */
1157 "R_PPC64_SECTOFF_DS", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xfffc, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1164 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc64_elf_sectoff_reloc, /* special_function */
1172 "R_PPC64_SECTOFF_LO_DS",/* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xfffc, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1179 HOWTO (R_PPC64_TOC16_DS, /* type */
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_signed, /* complain_on_overflow */
1186 ppc64_elf_toc_reloc, /* special_function */
1187 "R_PPC64_TOC16_DS", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xfffc, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1194 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1195 0, /* rightshift */
1196 1, /* size (0 = byte, 1 = short, 2 = long) */
1197 16, /* bitsize */
1198 FALSE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_dont, /* complain_on_overflow */
1201 ppc64_elf_toc_reloc, /* special_function */
1202 "R_PPC64_TOC16_LO_DS", /* name */
1203 FALSE, /* partial_inplace */
1204 0, /* src_mask */
1205 0xfffc, /* dst_mask */
1206 FALSE), /* pcrel_offset */
1207
1208 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1209 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1210 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1211 0, /* rightshift */
1212 1, /* size (0 = byte, 1 = short, 2 = long) */
1213 16, /* bitsize */
1214 FALSE, /* pc_relative */
1215 0, /* bitpos */
1216 complain_overflow_signed, /* complain_on_overflow */
1217 ppc64_elf_unhandled_reloc, /* special_function */
1218 "R_PPC64_PLTGOT16_DS", /* name */
1219 FALSE, /* partial_inplace */
1220 0, /* src_mask */
1221 0xfffc, /* dst_mask */
1222 FALSE), /* pcrel_offset */
1223
1224 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1225 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1226 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1227 0, /* rightshift */
1228 1, /* size (0 = byte, 1 = short, 2 = long) */
1229 16, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_dont, /* complain_on_overflow */
1233 ppc64_elf_unhandled_reloc, /* special_function */
1234 "R_PPC64_PLTGOT16_LO_DS",/* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0xfffc, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* Marker relocs for TLS. */
1241 HOWTO (R_PPC64_TLS,
1242 0, /* rightshift */
1243 2, /* size (0 = byte, 1 = short, 2 = long) */
1244 32, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_dont, /* complain_on_overflow */
1248 bfd_elf_generic_reloc, /* special_function */
1249 "R_PPC64_TLS", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 0, /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 HOWTO (R_PPC64_TLSGD,
1256 0, /* rightshift */
1257 2, /* size (0 = byte, 1 = short, 2 = long) */
1258 32, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_dont, /* complain_on_overflow */
1262 bfd_elf_generic_reloc, /* special_function */
1263 "R_PPC64_TLSGD", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 0, /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 HOWTO (R_PPC64_TLSLD,
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 32, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont, /* complain_on_overflow */
1276 bfd_elf_generic_reloc, /* special_function */
1277 "R_PPC64_TLSLD", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* Computes the load module index of the load module that contains the
1284 definition of its TLS sym. */
1285 HOWTO (R_PPC64_DTPMOD64,
1286 0, /* rightshift */
1287 4, /* size (0 = byte, 1 = short, 2 = long) */
1288 64, /* bitsize */
1289 FALSE, /* pc_relative */
1290 0, /* bitpos */
1291 complain_overflow_dont, /* complain_on_overflow */
1292 ppc64_elf_unhandled_reloc, /* special_function */
1293 "R_PPC64_DTPMOD64", /* name */
1294 FALSE, /* partial_inplace */
1295 0, /* src_mask */
1296 ONES (64), /* dst_mask */
1297 FALSE), /* pcrel_offset */
1298
1299 /* Computes a dtv-relative displacement, the difference between the value
1300 of sym+add and the base address of the thread-local storage block that
1301 contains the definition of sym, minus 0x8000. */
1302 HOWTO (R_PPC64_DTPREL64,
1303 0, /* rightshift */
1304 4, /* size (0 = byte, 1 = short, 2 = long) */
1305 64, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_dont, /* complain_on_overflow */
1309 ppc64_elf_unhandled_reloc, /* special_function */
1310 "R_PPC64_DTPREL64", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 ONES (64), /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* A 16 bit dtprel reloc. */
1317 HOWTO (R_PPC64_DTPREL16,
1318 0, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_signed, /* complain_on_overflow */
1324 ppc64_elf_unhandled_reloc, /* special_function */
1325 "R_PPC64_DTPREL16", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* Like DTPREL16, but no overflow. */
1332 HOWTO (R_PPC64_DTPREL16_LO,
1333 0, /* rightshift */
1334 1, /* size (0 = byte, 1 = short, 2 = long) */
1335 16, /* bitsize */
1336 FALSE, /* pc_relative */
1337 0, /* bitpos */
1338 complain_overflow_dont, /* complain_on_overflow */
1339 ppc64_elf_unhandled_reloc, /* special_function */
1340 "R_PPC64_DTPREL16_LO", /* name */
1341 FALSE, /* partial_inplace */
1342 0, /* src_mask */
1343 0xffff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1347 HOWTO (R_PPC64_DTPREL16_HI,
1348 16, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPREL16_HI", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1362 HOWTO (R_PPC64_DTPREL16_HA,
1363 16, /* rightshift */
1364 1, /* size (0 = byte, 1 = short, 2 = long) */
1365 16, /* bitsize */
1366 FALSE, /* pc_relative */
1367 0, /* bitpos */
1368 complain_overflow_dont, /* complain_on_overflow */
1369 ppc64_elf_unhandled_reloc, /* special_function */
1370 "R_PPC64_DTPREL16_HA", /* name */
1371 FALSE, /* partial_inplace */
1372 0, /* src_mask */
1373 0xffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1375
1376 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1377 HOWTO (R_PPC64_DTPREL16_HIGHER,
1378 32, /* rightshift */
1379 1, /* size (0 = byte, 1 = short, 2 = long) */
1380 16, /* bitsize */
1381 FALSE, /* pc_relative */
1382 0, /* bitpos */
1383 complain_overflow_dont, /* complain_on_overflow */
1384 ppc64_elf_unhandled_reloc, /* special_function */
1385 "R_PPC64_DTPREL16_HIGHER", /* name */
1386 FALSE, /* partial_inplace */
1387 0, /* src_mask */
1388 0xffff, /* dst_mask */
1389 FALSE), /* pcrel_offset */
1390
1391 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1392 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1393 32, /* rightshift */
1394 1, /* size (0 = byte, 1 = short, 2 = long) */
1395 16, /* bitsize */
1396 FALSE, /* pc_relative */
1397 0, /* bitpos */
1398 complain_overflow_dont, /* complain_on_overflow */
1399 ppc64_elf_unhandled_reloc, /* special_function */
1400 "R_PPC64_DTPREL16_HIGHERA", /* name */
1401 FALSE, /* partial_inplace */
1402 0, /* src_mask */
1403 0xffff, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1405
1406 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1407 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1408 48, /* rightshift */
1409 1, /* size (0 = byte, 1 = short, 2 = long) */
1410 16, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_dont, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_DTPREL16_HIGHEST", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 0xffff, /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1422 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1423 48, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_dont, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Like DTPREL16, but for insns with a DS field. */
1437 HOWTO (R_PPC64_DTPREL16_DS,
1438 0, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 16, /* bitsize */
1441 FALSE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_signed, /* complain_on_overflow */
1444 ppc64_elf_unhandled_reloc, /* special_function */
1445 "R_PPC64_DTPREL16_DS", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xfffc, /* dst_mask */
1449 FALSE), /* pcrel_offset */
1450
1451 /* Like DTPREL16_DS, but no overflow. */
1452 HOWTO (R_PPC64_DTPREL16_LO_DS,
1453 0, /* rightshift */
1454 1, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
1458 complain_overflow_dont, /* complain_on_overflow */
1459 ppc64_elf_unhandled_reloc, /* special_function */
1460 "R_PPC64_DTPREL16_LO_DS", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xfffc, /* dst_mask */
1464 FALSE), /* pcrel_offset */
1465
1466 /* Computes a tp-relative displacement, the difference between the value of
1467 sym+add and the value of the thread pointer (r13). */
1468 HOWTO (R_PPC64_TPREL64,
1469 0, /* rightshift */
1470 4, /* size (0 = byte, 1 = short, 2 = long) */
1471 64, /* bitsize */
1472 FALSE, /* pc_relative */
1473 0, /* bitpos */
1474 complain_overflow_dont, /* complain_on_overflow */
1475 ppc64_elf_unhandled_reloc, /* special_function */
1476 "R_PPC64_TPREL64", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 ONES (64), /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* A 16 bit tprel reloc. */
1483 HOWTO (R_PPC64_TPREL16,
1484 0, /* rightshift */
1485 1, /* size (0 = byte, 1 = short, 2 = long) */
1486 16, /* bitsize */
1487 FALSE, /* pc_relative */
1488 0, /* bitpos */
1489 complain_overflow_signed, /* complain_on_overflow */
1490 ppc64_elf_unhandled_reloc, /* special_function */
1491 "R_PPC64_TPREL16", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0xffff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Like TPREL16, but no overflow. */
1498 HOWTO (R_PPC64_TPREL16_LO,
1499 0, /* rightshift */
1500 1, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_dont, /* complain_on_overflow */
1505 ppc64_elf_unhandled_reloc, /* special_function */
1506 "R_PPC64_TPREL16_LO", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Like TPREL16_LO, but next higher group of 16 bits. */
1513 HOWTO (R_PPC64_TPREL16_HI,
1514 16, /* rightshift */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1516 16, /* bitsize */
1517 FALSE, /* pc_relative */
1518 0, /* bitpos */
1519 complain_overflow_dont, /* complain_on_overflow */
1520 ppc64_elf_unhandled_reloc, /* special_function */
1521 "R_PPC64_TPREL16_HI", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0xffff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Like TPREL16_HI, but adjust for low 16 bits. */
1528 HOWTO (R_PPC64_TPREL16_HA,
1529 16, /* rightshift */
1530 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_dont, /* complain_on_overflow */
1535 ppc64_elf_unhandled_reloc, /* special_function */
1536 "R_PPC64_TPREL16_HA", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Like TPREL16_HI, but next higher group of 16 bits. */
1543 HOWTO (R_PPC64_TPREL16_HIGHER,
1544 32, /* rightshift */
1545 1, /* size (0 = byte, 1 = short, 2 = long) */
1546 16, /* bitsize */
1547 FALSE, /* pc_relative */
1548 0, /* bitpos */
1549 complain_overflow_dont, /* complain_on_overflow */
1550 ppc64_elf_unhandled_reloc, /* special_function */
1551 "R_PPC64_TPREL16_HIGHER", /* name */
1552 FALSE, /* partial_inplace */
1553 0, /* src_mask */
1554 0xffff, /* dst_mask */
1555 FALSE), /* pcrel_offset */
1556
1557 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1558 HOWTO (R_PPC64_TPREL16_HIGHERA,
1559 32, /* rightshift */
1560 1, /* size (0 = byte, 1 = short, 2 = long) */
1561 16, /* bitsize */
1562 FALSE, /* pc_relative */
1563 0, /* bitpos */
1564 complain_overflow_dont, /* complain_on_overflow */
1565 ppc64_elf_unhandled_reloc, /* special_function */
1566 "R_PPC64_TPREL16_HIGHERA", /* name */
1567 FALSE, /* partial_inplace */
1568 0, /* src_mask */
1569 0xffff, /* dst_mask */
1570 FALSE), /* pcrel_offset */
1571
1572 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1573 HOWTO (R_PPC64_TPREL16_HIGHEST,
1574 48, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_dont, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_TPREL16_HIGHEST", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xffff, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1588 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1589 48, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_TPREL16_HIGHESTA", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xffff, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Like TPREL16, but for insns with a DS field. */
1603 HOWTO (R_PPC64_TPREL16_DS,
1604 0, /* rightshift */
1605 1, /* size (0 = byte, 1 = short, 2 = long) */
1606 16, /* bitsize */
1607 FALSE, /* pc_relative */
1608 0, /* bitpos */
1609 complain_overflow_signed, /* complain_on_overflow */
1610 ppc64_elf_unhandled_reloc, /* special_function */
1611 "R_PPC64_TPREL16_DS", /* name */
1612 FALSE, /* partial_inplace */
1613 0, /* src_mask */
1614 0xfffc, /* dst_mask */
1615 FALSE), /* pcrel_offset */
1616
1617 /* Like TPREL16_DS, but no overflow. */
1618 HOWTO (R_PPC64_TPREL16_LO_DS,
1619 0, /* rightshift */
1620 1, /* size (0 = byte, 1 = short, 2 = long) */
1621 16, /* bitsize */
1622 FALSE, /* pc_relative */
1623 0, /* bitpos */
1624 complain_overflow_dont, /* complain_on_overflow */
1625 ppc64_elf_unhandled_reloc, /* special_function */
1626 "R_PPC64_TPREL16_LO_DS", /* name */
1627 FALSE, /* partial_inplace */
1628 0, /* src_mask */
1629 0xfffc, /* dst_mask */
1630 FALSE), /* pcrel_offset */
1631
1632 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1633 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1634 to the first entry relative to the TOC base (r2). */
1635 HOWTO (R_PPC64_GOT_TLSGD16,
1636 0, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_signed, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSGD16", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSGD16, but no overflow. */
1650 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1651 0, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSGD16_LO", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1665 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1666 16, /* rightshift */
1667 1, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_dont, /* complain_on_overflow */
1672 ppc64_elf_unhandled_reloc, /* special_function */
1673 "R_PPC64_GOT_TLSGD16_HI", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0xffff, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1680 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1681 16, /* rightshift */
1682 1, /* size (0 = byte, 1 = short, 2 = long) */
1683 16, /* bitsize */
1684 FALSE, /* pc_relative */
1685 0, /* bitpos */
1686 complain_overflow_dont, /* complain_on_overflow */
1687 ppc64_elf_unhandled_reloc, /* special_function */
1688 "R_PPC64_GOT_TLSGD16_HA", /* name */
1689 FALSE, /* partial_inplace */
1690 0, /* src_mask */
1691 0xffff, /* dst_mask */
1692 FALSE), /* pcrel_offset */
1693
1694 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1695 with values (sym+add)@dtpmod and zero, and computes the offset to the
1696 first entry relative to the TOC base (r2). */
1697 HOWTO (R_PPC64_GOT_TLSLD16,
1698 0, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_signed, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSLD16", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSLD16, but no overflow. */
1712 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1713 0, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSLD16_LO", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1727 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1728 16, /* rightshift */
1729 1, /* size (0 = byte, 1 = short, 2 = long) */
1730 16, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
1733 complain_overflow_dont, /* complain_on_overflow */
1734 ppc64_elf_unhandled_reloc, /* special_function */
1735 "R_PPC64_GOT_TLSLD16_HI", /* name */
1736 FALSE, /* partial_inplace */
1737 0, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1740
1741 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1742 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1743 16, /* rightshift */
1744 1, /* size (0 = byte, 1 = short, 2 = long) */
1745 16, /* bitsize */
1746 FALSE, /* pc_relative */
1747 0, /* bitpos */
1748 complain_overflow_dont, /* complain_on_overflow */
1749 ppc64_elf_unhandled_reloc, /* special_function */
1750 "R_PPC64_GOT_TLSLD16_HA", /* name */
1751 FALSE, /* partial_inplace */
1752 0, /* src_mask */
1753 0xffff, /* dst_mask */
1754 FALSE), /* pcrel_offset */
1755
1756 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1757 the offset to the entry relative to the TOC base (r2). */
1758 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1759 0, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_signed, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_DTPREL16_DS", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xfffc, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_DTPREL16_DS, but no overflow. */
1773 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1774 0, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xfffc, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1788 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1789 16, /* rightshift */
1790 1, /* size (0 = byte, 1 = short, 2 = long) */
1791 16, /* bitsize */
1792 FALSE, /* pc_relative */
1793 0, /* bitpos */
1794 complain_overflow_dont, /* complain_on_overflow */
1795 ppc64_elf_unhandled_reloc, /* special_function */
1796 "R_PPC64_GOT_DTPREL16_HI", /* name */
1797 FALSE, /* partial_inplace */
1798 0, /* src_mask */
1799 0xffff, /* dst_mask */
1800 FALSE), /* pcrel_offset */
1801
1802 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1803 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1804 16, /* rightshift */
1805 1, /* size (0 = byte, 1 = short, 2 = long) */
1806 16, /* bitsize */
1807 FALSE, /* pc_relative */
1808 0, /* bitpos */
1809 complain_overflow_dont, /* complain_on_overflow */
1810 ppc64_elf_unhandled_reloc, /* special_function */
1811 "R_PPC64_GOT_DTPREL16_HA", /* name */
1812 FALSE, /* partial_inplace */
1813 0, /* src_mask */
1814 0xffff, /* dst_mask */
1815 FALSE), /* pcrel_offset */
1816
1817 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1818 offset to the entry relative to the TOC base (r2). */
1819 HOWTO (R_PPC64_GOT_TPREL16_DS,
1820 0, /* rightshift */
1821 1, /* size (0 = byte, 1 = short, 2 = long) */
1822 16, /* bitsize */
1823 FALSE, /* pc_relative */
1824 0, /* bitpos */
1825 complain_overflow_signed, /* complain_on_overflow */
1826 ppc64_elf_unhandled_reloc, /* special_function */
1827 "R_PPC64_GOT_TPREL16_DS", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0xfffc, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* Like GOT_TPREL16_DS, but no overflow. */
1834 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1835 0, /* rightshift */
1836 1, /* size (0 = byte, 1 = short, 2 = long) */
1837 16, /* bitsize */
1838 FALSE, /* pc_relative */
1839 0, /* bitpos */
1840 complain_overflow_dont, /* complain_on_overflow */
1841 ppc64_elf_unhandled_reloc, /* special_function */
1842 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1843 FALSE, /* partial_inplace */
1844 0, /* src_mask */
1845 0xfffc, /* dst_mask */
1846 FALSE), /* pcrel_offset */
1847
1848 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1849 HOWTO (R_PPC64_GOT_TPREL16_HI,
1850 16, /* rightshift */
1851 1, /* size (0 = byte, 1 = short, 2 = long) */
1852 16, /* bitsize */
1853 FALSE, /* pc_relative */
1854 0, /* bitpos */
1855 complain_overflow_dont, /* complain_on_overflow */
1856 ppc64_elf_unhandled_reloc, /* special_function */
1857 "R_PPC64_GOT_TPREL16_HI", /* name */
1858 FALSE, /* partial_inplace */
1859 0, /* src_mask */
1860 0xffff, /* dst_mask */
1861 FALSE), /* pcrel_offset */
1862
1863 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1864 HOWTO (R_PPC64_GOT_TPREL16_HA,
1865 16, /* rightshift */
1866 1, /* size (0 = byte, 1 = short, 2 = long) */
1867 16, /* bitsize */
1868 FALSE, /* pc_relative */
1869 0, /* bitpos */
1870 complain_overflow_dont, /* complain_on_overflow */
1871 ppc64_elf_unhandled_reloc, /* special_function */
1872 "R_PPC64_GOT_TPREL16_HA", /* name */
1873 FALSE, /* partial_inplace */
1874 0, /* src_mask */
1875 0xffff, /* dst_mask */
1876 FALSE), /* pcrel_offset */
1877
1878 HOWTO (R_PPC64_JMP_IREL, /* type */
1879 0, /* rightshift */
1880 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1881 0, /* bitsize */
1882 FALSE, /* pc_relative */
1883 0, /* bitpos */
1884 complain_overflow_dont, /* complain_on_overflow */
1885 ppc64_elf_unhandled_reloc, /* special_function */
1886 "R_PPC64_JMP_IREL", /* name */
1887 FALSE, /* partial_inplace */
1888 0, /* src_mask */
1889 0, /* dst_mask */
1890 FALSE), /* pcrel_offset */
1891
1892 HOWTO (R_PPC64_IRELATIVE, /* type */
1893 0, /* rightshift */
1894 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1895 64, /* bitsize */
1896 FALSE, /* pc_relative */
1897 0, /* bitpos */
1898 complain_overflow_dont, /* complain_on_overflow */
1899 bfd_elf_generic_reloc, /* special_function */
1900 "R_PPC64_IRELATIVE", /* name */
1901 FALSE, /* partial_inplace */
1902 0, /* src_mask */
1903 ONES (64), /* dst_mask */
1904 FALSE), /* pcrel_offset */
1905
1906 /* A 16 bit relative relocation. */
1907 HOWTO (R_PPC64_REL16, /* type */
1908 0, /* rightshift */
1909 1, /* size (0 = byte, 1 = short, 2 = long) */
1910 16, /* bitsize */
1911 TRUE, /* pc_relative */
1912 0, /* bitpos */
1913 complain_overflow_bitfield, /* complain_on_overflow */
1914 bfd_elf_generic_reloc, /* special_function */
1915 "R_PPC64_REL16", /* name */
1916 FALSE, /* partial_inplace */
1917 0, /* src_mask */
1918 0xffff, /* dst_mask */
1919 TRUE), /* pcrel_offset */
1920
1921 /* A 16 bit relative relocation without overflow. */
1922 HOWTO (R_PPC64_REL16_LO, /* type */
1923 0, /* rightshift */
1924 1, /* size (0 = byte, 1 = short, 2 = long) */
1925 16, /* bitsize */
1926 TRUE, /* pc_relative */
1927 0, /* bitpos */
1928 complain_overflow_dont,/* complain_on_overflow */
1929 bfd_elf_generic_reloc, /* special_function */
1930 "R_PPC64_REL16_LO", /* name */
1931 FALSE, /* partial_inplace */
1932 0, /* src_mask */
1933 0xffff, /* dst_mask */
1934 TRUE), /* pcrel_offset */
1935
1936 /* The high order 16 bits of a relative address. */
1937 HOWTO (R_PPC64_REL16_HI, /* type */
1938 16, /* rightshift */
1939 1, /* size (0 = byte, 1 = short, 2 = long) */
1940 16, /* bitsize */
1941 TRUE, /* pc_relative */
1942 0, /* bitpos */
1943 complain_overflow_dont, /* complain_on_overflow */
1944 bfd_elf_generic_reloc, /* special_function */
1945 "R_PPC64_REL16_HI", /* name */
1946 FALSE, /* partial_inplace */
1947 0, /* src_mask */
1948 0xffff, /* dst_mask */
1949 TRUE), /* pcrel_offset */
1950
1951 /* The high order 16 bits of a relative address, plus 1 if the contents of
1952 the low 16 bits, treated as a signed number, is negative. */
1953 HOWTO (R_PPC64_REL16_HA, /* type */
1954 16, /* rightshift */
1955 1, /* size (0 = byte, 1 = short, 2 = long) */
1956 16, /* bitsize */
1957 TRUE, /* pc_relative */
1958 0, /* bitpos */
1959 complain_overflow_dont, /* complain_on_overflow */
1960 ppc64_elf_ha_reloc, /* special_function */
1961 "R_PPC64_REL16_HA", /* name */
1962 FALSE, /* partial_inplace */
1963 0, /* src_mask */
1964 0xffff, /* dst_mask */
1965 TRUE), /* pcrel_offset */
1966
1967 /* GNU extension to record C++ vtable hierarchy. */
1968 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1969 0, /* rightshift */
1970 0, /* size (0 = byte, 1 = short, 2 = long) */
1971 0, /* bitsize */
1972 FALSE, /* pc_relative */
1973 0, /* bitpos */
1974 complain_overflow_dont, /* complain_on_overflow */
1975 NULL, /* special_function */
1976 "R_PPC64_GNU_VTINHERIT", /* name */
1977 FALSE, /* partial_inplace */
1978 0, /* src_mask */
1979 0, /* dst_mask */
1980 FALSE), /* pcrel_offset */
1981
1982 /* GNU extension to record C++ vtable member usage. */
1983 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1984 0, /* rightshift */
1985 0, /* size (0 = byte, 1 = short, 2 = long) */
1986 0, /* bitsize */
1987 FALSE, /* pc_relative */
1988 0, /* bitpos */
1989 complain_overflow_dont, /* complain_on_overflow */
1990 NULL, /* special_function */
1991 "R_PPC64_GNU_VTENTRY", /* name */
1992 FALSE, /* partial_inplace */
1993 0, /* src_mask */
1994 0, /* dst_mask */
1995 FALSE), /* pcrel_offset */
1996 };
1997
1998 \f
1999 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2000 be done. */
2001
2002 static void
2003 ppc_howto_init (void)
2004 {
2005 unsigned int i, type;
2006
2007 for (i = 0;
2008 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2009 i++)
2010 {
2011 type = ppc64_elf_howto_raw[i].type;
2012 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2013 / sizeof (ppc64_elf_howto_table[0])));
2014 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2015 }
2016 }
2017
2018 static reloc_howto_type *
2019 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2020 bfd_reloc_code_real_type code)
2021 {
2022 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2023
2024 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2025 /* Initialize howto table if needed. */
2026 ppc_howto_init ();
2027
2028 switch (code)
2029 {
2030 default:
2031 return NULL;
2032
2033 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2034 break;
2035 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2036 break;
2037 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2038 break;
2039 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2040 break;
2041 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2042 break;
2043 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2044 break;
2045 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2046 break;
2047 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2048 break;
2049 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2050 break;
2051 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2052 break;
2053 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2054 break;
2055 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2056 break;
2057 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2058 break;
2059 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2060 break;
2061 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2062 break;
2063 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2064 break;
2065 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2066 break;
2067 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2068 break;
2069 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2070 break;
2071 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2072 break;
2073 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2074 break;
2075 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2076 break;
2077 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2078 break;
2079 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2080 break;
2081 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2082 break;
2083 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2084 break;
2085 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2086 break;
2087 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2088 break;
2089 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2090 break;
2091 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2092 break;
2093 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2094 break;
2095 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2096 break;
2097 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2098 break;
2099 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2100 break;
2101 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2102 break;
2103 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2104 break;
2105 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2106 break;
2107 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2108 break;
2109 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2110 break;
2111 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2112 break;
2113 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2114 break;
2115 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2116 break;
2117 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2118 break;
2119 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2120 break;
2121 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2122 break;
2123 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2124 break;
2125 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2126 break;
2127 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2128 break;
2129 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2130 break;
2131 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2132 break;
2133 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2134 break;
2135 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2136 break;
2137 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2138 break;
2139 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2140 break;
2141 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2142 break;
2143 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2144 break;
2145 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2146 break;
2147 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2150 break;
2151 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2152 break;
2153 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2154 break;
2155 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2156 break;
2157 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2158 break;
2159 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2160 break;
2161 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2162 break;
2163 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2164 break;
2165 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2166 break;
2167 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2168 break;
2169 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2170 break;
2171 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2172 break;
2173 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2174 break;
2175 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2176 break;
2177 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2178 break;
2179 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2180 break;
2181 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2182 break;
2183 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2184 break;
2185 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2186 break;
2187 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2188 break;
2189 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2190 break;
2191 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2192 break;
2193 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2194 break;
2195 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2196 break;
2197 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2198 break;
2199 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2200 break;
2201 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2202 break;
2203 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2204 break;
2205 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2206 break;
2207 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2208 break;
2209 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2210 break;
2211 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2212 break;
2213 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2214 break;
2215 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2216 break;
2217 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2218 break;
2219 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2220 break;
2221 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2222 break;
2223 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2224 break;
2225 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2226 break;
2227 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2228 break;
2229 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2230 break;
2231 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2232 break;
2233 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2234 break;
2235 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2236 break;
2237 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2238 break;
2239 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2240 break;
2241 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2242 break;
2243 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2244 break;
2245 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2246 break;
2247 }
2248
2249 return ppc64_elf_howto_table[r];
2250 };
2251
2252 static reloc_howto_type *
2253 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2254 const char *r_name)
2255 {
2256 unsigned int i;
2257
2258 for (i = 0;
2259 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2260 i++)
2261 if (ppc64_elf_howto_raw[i].name != NULL
2262 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2263 return &ppc64_elf_howto_raw[i];
2264
2265 return NULL;
2266 }
2267
2268 /* Set the howto pointer for a PowerPC ELF reloc. */
2269
2270 static void
2271 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2272 Elf_Internal_Rela *dst)
2273 {
2274 unsigned int type;
2275
2276 /* Initialize howto table if needed. */
2277 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2278 ppc_howto_init ();
2279
2280 type = ELF64_R_TYPE (dst->r_info);
2281 if (type >= (sizeof (ppc64_elf_howto_table)
2282 / sizeof (ppc64_elf_howto_table[0])))
2283 {
2284 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2285 abfd, (int) type);
2286 type = R_PPC64_NONE;
2287 }
2288 cache_ptr->howto = ppc64_elf_howto_table[type];
2289 }
2290
2291 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2292
2293 static bfd_reloc_status_type
2294 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2295 void *data, asection *input_section,
2296 bfd *output_bfd, char **error_message)
2297 {
2298 /* If this is a relocatable link (output_bfd test tells us), just
2299 call the generic function. Any adjustment will be done at final
2300 link time. */
2301 if (output_bfd != NULL)
2302 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2303 input_section, output_bfd, error_message);
2304
2305 /* Adjust the addend for sign extension of the low 16 bits.
2306 We won't actually be using the low 16 bits, so trashing them
2307 doesn't matter. */
2308 reloc_entry->addend += 0x8000;
2309 return bfd_reloc_continue;
2310 }
2311
2312 static bfd_reloc_status_type
2313 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2314 void *data, asection *input_section,
2315 bfd *output_bfd, char **error_message)
2316 {
2317 if (output_bfd != NULL)
2318 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2319 input_section, output_bfd, error_message);
2320
2321 if (strcmp (symbol->section->name, ".opd") == 0
2322 && (symbol->section->owner->flags & DYNAMIC) == 0)
2323 {
2324 bfd_vma dest = opd_entry_value (symbol->section,
2325 symbol->value + reloc_entry->addend,
2326 NULL, NULL);
2327 if (dest != (bfd_vma) -1)
2328 reloc_entry->addend = dest - (symbol->value
2329 + symbol->section->output_section->vma
2330 + symbol->section->output_offset);
2331 }
2332 return bfd_reloc_continue;
2333 }
2334
2335 static bfd_reloc_status_type
2336 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2337 void *data, asection *input_section,
2338 bfd *output_bfd, char **error_message)
2339 {
2340 long insn;
2341 enum elf_ppc64_reloc_type r_type;
2342 bfd_size_type octets;
2343 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2344 bfd_boolean is_power4 = FALSE;
2345
2346 /* If this is a relocatable link (output_bfd test tells us), just
2347 call the generic function. Any adjustment will be done at final
2348 link time. */
2349 if (output_bfd != NULL)
2350 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2351 input_section, output_bfd, error_message);
2352
2353 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2354 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2355 insn &= ~(0x01 << 21);
2356 r_type = reloc_entry->howto->type;
2357 if (r_type == R_PPC64_ADDR14_BRTAKEN
2358 || r_type == R_PPC64_REL14_BRTAKEN)
2359 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2360
2361 if (is_power4)
2362 {
2363 /* Set 'a' bit. This is 0b00010 in BO field for branch
2364 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2365 for branch on CTR insns (BO == 1a00t or 1a01t). */
2366 if ((insn & (0x14 << 21)) == (0x04 << 21))
2367 insn |= 0x02 << 21;
2368 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2369 insn |= 0x08 << 21;
2370 else
2371 goto out;
2372 }
2373 else
2374 {
2375 bfd_vma target = 0;
2376 bfd_vma from;
2377
2378 if (!bfd_is_com_section (symbol->section))
2379 target = symbol->value;
2380 target += symbol->section->output_section->vma;
2381 target += symbol->section->output_offset;
2382 target += reloc_entry->addend;
2383
2384 from = (reloc_entry->address
2385 + input_section->output_offset
2386 + input_section->output_section->vma);
2387
2388 /* Invert 'y' bit if not the default. */
2389 if ((bfd_signed_vma) (target - from) < 0)
2390 insn ^= 0x01 << 21;
2391 }
2392 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2393 out:
2394 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2395 input_section, output_bfd, error_message);
2396 }
2397
2398 static bfd_reloc_status_type
2399 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2400 void *data, asection *input_section,
2401 bfd *output_bfd, char **error_message)
2402 {
2403 /* If this is a relocatable link (output_bfd test tells us), just
2404 call the generic function. Any adjustment will be done at final
2405 link time. */
2406 if (output_bfd != NULL)
2407 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2408 input_section, output_bfd, error_message);
2409
2410 /* Subtract the symbol section base address. */
2411 reloc_entry->addend -= symbol->section->output_section->vma;
2412 return bfd_reloc_continue;
2413 }
2414
2415 static bfd_reloc_status_type
2416 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2417 void *data, asection *input_section,
2418 bfd *output_bfd, char **error_message)
2419 {
2420 /* If this is a relocatable link (output_bfd test tells us), just
2421 call the generic function. Any adjustment will be done at final
2422 link time. */
2423 if (output_bfd != NULL)
2424 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2425 input_section, output_bfd, error_message);
2426
2427 /* Subtract the symbol section base address. */
2428 reloc_entry->addend -= symbol->section->output_section->vma;
2429
2430 /* Adjust the addend for sign extension of the low 16 bits. */
2431 reloc_entry->addend += 0x8000;
2432 return bfd_reloc_continue;
2433 }
2434
2435 static bfd_reloc_status_type
2436 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2437 void *data, asection *input_section,
2438 bfd *output_bfd, char **error_message)
2439 {
2440 bfd_vma TOCstart;
2441
2442 /* If this is a relocatable link (output_bfd test tells us), just
2443 call the generic function. Any adjustment will be done at final
2444 link time. */
2445 if (output_bfd != NULL)
2446 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2447 input_section, output_bfd, error_message);
2448
2449 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2450 if (TOCstart == 0)
2451 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2452
2453 /* Subtract the TOC base address. */
2454 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2455 return bfd_reloc_continue;
2456 }
2457
2458 static bfd_reloc_status_type
2459 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2460 void *data, asection *input_section,
2461 bfd *output_bfd, char **error_message)
2462 {
2463 bfd_vma TOCstart;
2464
2465 /* If this is a relocatable link (output_bfd test tells us), just
2466 call the generic function. Any adjustment will be done at final
2467 link time. */
2468 if (output_bfd != NULL)
2469 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2470 input_section, output_bfd, error_message);
2471
2472 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2473 if (TOCstart == 0)
2474 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2475
2476 /* Subtract the TOC base address. */
2477 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2478
2479 /* Adjust the addend for sign extension of the low 16 bits. */
2480 reloc_entry->addend += 0x8000;
2481 return bfd_reloc_continue;
2482 }
2483
2484 static bfd_reloc_status_type
2485 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2486 void *data, asection *input_section,
2487 bfd *output_bfd, char **error_message)
2488 {
2489 bfd_vma TOCstart;
2490 bfd_size_type octets;
2491
2492 /* If this is a relocatable link (output_bfd test tells us), just
2493 call the generic function. Any adjustment will be done at final
2494 link time. */
2495 if (output_bfd != NULL)
2496 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2497 input_section, output_bfd, error_message);
2498
2499 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2500 if (TOCstart == 0)
2501 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2502
2503 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2504 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2505 return bfd_reloc_ok;
2506 }
2507
2508 static bfd_reloc_status_type
2509 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2510 void *data, asection *input_section,
2511 bfd *output_bfd, char **error_message)
2512 {
2513 /* If this is a relocatable link (output_bfd test tells us), just
2514 call the generic function. Any adjustment will be done at final
2515 link time. */
2516 if (output_bfd != NULL)
2517 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2518 input_section, output_bfd, error_message);
2519
2520 if (error_message != NULL)
2521 {
2522 static char buf[60];
2523 sprintf (buf, "generic linker can't handle %s",
2524 reloc_entry->howto->name);
2525 *error_message = buf;
2526 }
2527 return bfd_reloc_dangerous;
2528 }
2529
2530 /* Track GOT entries needed for a given symbol. We might need more
2531 than one got entry per symbol. */
2532 struct got_entry
2533 {
2534 struct got_entry *next;
2535
2536 /* The symbol addend that we'll be placing in the GOT. */
2537 bfd_vma addend;
2538
2539 /* Unlike other ELF targets, we use separate GOT entries for the same
2540 symbol referenced from different input files. This is to support
2541 automatic multiple TOC/GOT sections, where the TOC base can vary
2542 from one input file to another. After partitioning into TOC groups
2543 we merge entries within the group.
2544
2545 Point to the BFD owning this GOT entry. */
2546 bfd *owner;
2547
2548 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2549 TLS_TPREL or TLS_DTPREL for tls entries. */
2550 unsigned char tls_type;
2551
2552 /* Non-zero if got.ent points to real entry. */
2553 unsigned char is_indirect;
2554
2555 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2556 union
2557 {
2558 bfd_signed_vma refcount;
2559 bfd_vma offset;
2560 struct got_entry *ent;
2561 } got;
2562 };
2563
2564 /* The same for PLT. */
2565 struct plt_entry
2566 {
2567 struct plt_entry *next;
2568
2569 bfd_vma addend;
2570
2571 union
2572 {
2573 bfd_signed_vma refcount;
2574 bfd_vma offset;
2575 } plt;
2576 };
2577
2578 struct ppc64_elf_obj_tdata
2579 {
2580 struct elf_obj_tdata elf;
2581
2582 /* Shortcuts to dynamic linker sections. */
2583 asection *got;
2584 asection *relgot;
2585
2586 /* Used during garbage collection. We attach global symbols defined
2587 on removed .opd entries to this section so that the sym is removed. */
2588 asection *deleted_section;
2589
2590 /* TLS local dynamic got entry handling. Support for multiple GOT
2591 sections means we potentially need one of these for each input bfd. */
2592 struct got_entry tlsld_got;
2593
2594 /* A copy of relocs before they are modified for --emit-relocs. */
2595 Elf_Internal_Rela *opd_relocs;
2596
2597 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2598 the reloc to be in the range -32768 to 32767. */
2599 unsigned int has_small_toc_reloc;
2600 };
2601
2602 #define ppc64_elf_tdata(bfd) \
2603 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2604
2605 #define ppc64_tlsld_got(bfd) \
2606 (&ppc64_elf_tdata (bfd)->tlsld_got)
2607
2608 #define is_ppc64_elf(bfd) \
2609 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2610 && elf_object_id (bfd) == PPC64_ELF_DATA)
2611
2612 /* Override the generic function because we store some extras. */
2613
2614 static bfd_boolean
2615 ppc64_elf_mkobject (bfd *abfd)
2616 {
2617 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2618 PPC64_ELF_DATA);
2619 }
2620
2621 /* Fix bad default arch selected for a 64 bit input bfd when the
2622 default is 32 bit. */
2623
2624 static bfd_boolean
2625 ppc64_elf_object_p (bfd *abfd)
2626 {
2627 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2628 {
2629 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2630
2631 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2632 {
2633 /* Relies on arch after 32 bit default being 64 bit default. */
2634 abfd->arch_info = abfd->arch_info->next;
2635 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2636 }
2637 }
2638 return TRUE;
2639 }
2640
2641 /* Support for core dump NOTE sections. */
2642
2643 static bfd_boolean
2644 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2645 {
2646 size_t offset, size;
2647
2648 if (note->descsz != 504)
2649 return FALSE;
2650
2651 /* pr_cursig */
2652 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2653
2654 /* pr_pid */
2655 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2656
2657 /* pr_reg */
2658 offset = 112;
2659 size = 384;
2660
2661 /* Make a ".reg/999" section. */
2662 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2663 size, note->descpos + offset);
2664 }
2665
2666 static bfd_boolean
2667 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2668 {
2669 if (note->descsz != 136)
2670 return FALSE;
2671
2672 elf_tdata (abfd)->core_program
2673 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2674 elf_tdata (abfd)->core_command
2675 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2676
2677 return TRUE;
2678 }
2679
2680 static char *
2681 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2682 ...)
2683 {
2684 switch (note_type)
2685 {
2686 default:
2687 return NULL;
2688
2689 case NT_PRPSINFO:
2690 {
2691 char data[136];
2692 va_list ap;
2693
2694 va_start (ap, note_type);
2695 memset (data, 0, 40);
2696 strncpy (data + 40, va_arg (ap, const char *), 16);
2697 strncpy (data + 56, va_arg (ap, const char *), 80);
2698 va_end (ap);
2699 return elfcore_write_note (abfd, buf, bufsiz,
2700 "CORE", note_type, data, sizeof (data));
2701 }
2702
2703 case NT_PRSTATUS:
2704 {
2705 char data[504];
2706 va_list ap;
2707 long pid;
2708 int cursig;
2709 const void *greg;
2710
2711 va_start (ap, note_type);
2712 memset (data, 0, 112);
2713 pid = va_arg (ap, long);
2714 bfd_put_32 (abfd, pid, data + 32);
2715 cursig = va_arg (ap, int);
2716 bfd_put_16 (abfd, cursig, data + 12);
2717 greg = va_arg (ap, const void *);
2718 memcpy (data + 112, greg, 384);
2719 memset (data + 496, 0, 8);
2720 va_end (ap);
2721 return elfcore_write_note (abfd, buf, bufsiz,
2722 "CORE", note_type, data, sizeof (data));
2723 }
2724 }
2725 }
2726
2727 /* Merge backend specific data from an object file to the output
2728 object file when linking. */
2729
2730 static bfd_boolean
2731 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2732 {
2733 /* Check if we have the same endianess. */
2734 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2735 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2736 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2737 {
2738 const char *msg;
2739
2740 if (bfd_big_endian (ibfd))
2741 msg = _("%B: compiled for a big endian system "
2742 "and target is little endian");
2743 else
2744 msg = _("%B: compiled for a little endian system "
2745 "and target is big endian");
2746
2747 (*_bfd_error_handler) (msg, ibfd);
2748
2749 bfd_set_error (bfd_error_wrong_format);
2750 return FALSE;
2751 }
2752
2753 return TRUE;
2754 }
2755
2756 /* Add extra PPC sections. */
2757
2758 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2759 {
2760 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2761 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2762 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2763 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2764 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2765 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2766 { NULL, 0, 0, 0, 0 }
2767 };
2768
2769 enum _ppc64_sec_type {
2770 sec_normal = 0,
2771 sec_opd = 1,
2772 sec_toc = 2
2773 };
2774
2775 struct _ppc64_elf_section_data
2776 {
2777 struct bfd_elf_section_data elf;
2778
2779 union
2780 {
2781 /* An array with one entry for each opd function descriptor. */
2782 struct _opd_sec_data
2783 {
2784 /* Points to the function code section for local opd entries. */
2785 asection **func_sec;
2786
2787 /* After editing .opd, adjust references to opd local syms. */
2788 long *adjust;
2789 } opd;
2790
2791 /* An array for toc sections, indexed by offset/8. */
2792 struct _toc_sec_data
2793 {
2794 /* Specifies the relocation symbol index used at a given toc offset. */
2795 unsigned *symndx;
2796
2797 /* And the relocation addend. */
2798 bfd_vma *add;
2799 } toc;
2800 } u;
2801
2802 enum _ppc64_sec_type sec_type:2;
2803
2804 /* Flag set when small branches are detected. Used to
2805 select suitable defaults for the stub group size. */
2806 unsigned int has_14bit_branch:1;
2807 };
2808
2809 #define ppc64_elf_section_data(sec) \
2810 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2811
2812 static bfd_boolean
2813 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2814 {
2815 if (!sec->used_by_bfd)
2816 {
2817 struct _ppc64_elf_section_data *sdata;
2818 bfd_size_type amt = sizeof (*sdata);
2819
2820 sdata = bfd_zalloc (abfd, amt);
2821 if (sdata == NULL)
2822 return FALSE;
2823 sec->used_by_bfd = sdata;
2824 }
2825
2826 return _bfd_elf_new_section_hook (abfd, sec);
2827 }
2828
2829 static struct _opd_sec_data *
2830 get_opd_info (asection * sec)
2831 {
2832 if (sec != NULL
2833 && ppc64_elf_section_data (sec) != NULL
2834 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2835 return &ppc64_elf_section_data (sec)->u.opd;
2836 return NULL;
2837 }
2838 \f
2839 /* Parameters for the qsort hook. */
2840 static bfd_boolean synthetic_relocatable;
2841
2842 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2843
2844 static int
2845 compare_symbols (const void *ap, const void *bp)
2846 {
2847 const asymbol *a = * (const asymbol **) ap;
2848 const asymbol *b = * (const asymbol **) bp;
2849
2850 /* Section symbols first. */
2851 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2852 return -1;
2853 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2854 return 1;
2855
2856 /* then .opd symbols. */
2857 if (strcmp (a->section->name, ".opd") == 0
2858 && strcmp (b->section->name, ".opd") != 0)
2859 return -1;
2860 if (strcmp (a->section->name, ".opd") != 0
2861 && strcmp (b->section->name, ".opd") == 0)
2862 return 1;
2863
2864 /* then other code symbols. */
2865 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2866 == (SEC_CODE | SEC_ALLOC)
2867 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2868 != (SEC_CODE | SEC_ALLOC))
2869 return -1;
2870
2871 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2872 != (SEC_CODE | SEC_ALLOC)
2873 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2874 == (SEC_CODE | SEC_ALLOC))
2875 return 1;
2876
2877 if (synthetic_relocatable)
2878 {
2879 if (a->section->id < b->section->id)
2880 return -1;
2881
2882 if (a->section->id > b->section->id)
2883 return 1;
2884 }
2885
2886 if (a->value + a->section->vma < b->value + b->section->vma)
2887 return -1;
2888
2889 if (a->value + a->section->vma > b->value + b->section->vma)
2890 return 1;
2891
2892 /* For syms with the same value, prefer strong dynamic global function
2893 syms over other syms. */
2894 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2895 return -1;
2896
2897 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2898 return 1;
2899
2900 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2901 return -1;
2902
2903 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2904 return 1;
2905
2906 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2907 return -1;
2908
2909 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2910 return 1;
2911
2912 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2913 return -1;
2914
2915 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2916 return 1;
2917
2918 return 0;
2919 }
2920
2921 /* Search SYMS for a symbol of the given VALUE. */
2922
2923 static asymbol *
2924 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2925 {
2926 long mid;
2927
2928 if (id == -1)
2929 {
2930 while (lo < hi)
2931 {
2932 mid = (lo + hi) >> 1;
2933 if (syms[mid]->value + syms[mid]->section->vma < value)
2934 lo = mid + 1;
2935 else if (syms[mid]->value + syms[mid]->section->vma > value)
2936 hi = mid;
2937 else
2938 return syms[mid];
2939 }
2940 }
2941 else
2942 {
2943 while (lo < hi)
2944 {
2945 mid = (lo + hi) >> 1;
2946 if (syms[mid]->section->id < id)
2947 lo = mid + 1;
2948 else if (syms[mid]->section->id > id)
2949 hi = mid;
2950 else if (syms[mid]->value < value)
2951 lo = mid + 1;
2952 else if (syms[mid]->value > value)
2953 hi = mid;
2954 else
2955 return syms[mid];
2956 }
2957 }
2958 return NULL;
2959 }
2960
2961 static bfd_boolean
2962 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2963 {
2964 bfd_vma vma = *(bfd_vma *) ptr;
2965 return ((section->flags & SEC_ALLOC) != 0
2966 && section->vma <= vma
2967 && vma < section->vma + section->size);
2968 }
2969
2970 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2971 entry syms. Also generate @plt symbols for the glink branch table. */
2972
2973 static long
2974 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2975 long static_count, asymbol **static_syms,
2976 long dyn_count, asymbol **dyn_syms,
2977 asymbol **ret)
2978 {
2979 asymbol *s;
2980 long i;
2981 long count;
2982 char *names;
2983 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2984 asection *opd;
2985 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2986 asymbol **syms;
2987
2988 *ret = NULL;
2989
2990 opd = bfd_get_section_by_name (abfd, ".opd");
2991 if (opd == NULL)
2992 return 0;
2993
2994 symcount = static_count;
2995 if (!relocatable)
2996 symcount += dyn_count;
2997 if (symcount == 0)
2998 return 0;
2999
3000 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
3001 if (syms == NULL)
3002 return -1;
3003
3004 if (!relocatable && static_count != 0 && dyn_count != 0)
3005 {
3006 /* Use both symbol tables. */
3007 memcpy (syms, static_syms, static_count * sizeof (*syms));
3008 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
3009 }
3010 else if (!relocatable && static_count == 0)
3011 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
3012 else
3013 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
3014
3015 synthetic_relocatable = relocatable;
3016 qsort (syms, symcount, sizeof (*syms), compare_symbols);
3017
3018 if (!relocatable && symcount > 1)
3019 {
3020 long j;
3021 /* Trim duplicate syms, since we may have merged the normal and
3022 dynamic symbols. Actually, we only care about syms that have
3023 different values, so trim any with the same value. */
3024 for (i = 1, j = 1; i < symcount; ++i)
3025 if (syms[i - 1]->value + syms[i - 1]->section->vma
3026 != syms[i]->value + syms[i]->section->vma)
3027 syms[j++] = syms[i];
3028 symcount = j;
3029 }
3030
3031 i = 0;
3032 if (strcmp (syms[i]->section->name, ".opd") == 0)
3033 ++i;
3034 codesecsym = i;
3035
3036 for (; i < symcount; ++i)
3037 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3038 != (SEC_CODE | SEC_ALLOC))
3039 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3040 break;
3041 codesecsymend = i;
3042
3043 for (; i < symcount; ++i)
3044 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3045 break;
3046 secsymend = i;
3047
3048 for (; i < symcount; ++i)
3049 if (strcmp (syms[i]->section->name, ".opd") != 0)
3050 break;
3051 opdsymend = i;
3052
3053 for (; i < symcount; ++i)
3054 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3055 != (SEC_CODE | SEC_ALLOC))
3056 break;
3057 symcount = i;
3058
3059 count = 0;
3060
3061 if (relocatable)
3062 {
3063 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3064 arelent *r;
3065 size_t size;
3066 long relcount;
3067
3068 if (opdsymend == secsymend)
3069 goto done;
3070
3071 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3072 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3073 if (relcount == 0)
3074 goto done;
3075
3076 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3077 {
3078 count = -1;
3079 goto done;
3080 }
3081
3082 size = 0;
3083 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3084 {
3085 asymbol *sym;
3086
3087 while (r < opd->relocation + relcount
3088 && r->address < syms[i]->value + opd->vma)
3089 ++r;
3090
3091 if (r == opd->relocation + relcount)
3092 break;
3093
3094 if (r->address != syms[i]->value + opd->vma)
3095 continue;
3096
3097 if (r->howto->type != R_PPC64_ADDR64)
3098 continue;
3099
3100 sym = *r->sym_ptr_ptr;
3101 if (!sym_exists_at (syms, opdsymend, symcount,
3102 sym->section->id, sym->value + r->addend))
3103 {
3104 ++count;
3105 size += sizeof (asymbol);
3106 size += strlen (syms[i]->name) + 2;
3107 }
3108 }
3109
3110 s = *ret = bfd_malloc (size);
3111 if (s == NULL)
3112 {
3113 count = -1;
3114 goto done;
3115 }
3116
3117 names = (char *) (s + count);
3118
3119 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3120 {
3121 asymbol *sym;
3122
3123 while (r < opd->relocation + relcount
3124 && r->address < syms[i]->value + opd->vma)
3125 ++r;
3126
3127 if (r == opd->relocation + relcount)
3128 break;
3129
3130 if (r->address != syms[i]->value + opd->vma)
3131 continue;
3132
3133 if (r->howto->type != R_PPC64_ADDR64)
3134 continue;
3135
3136 sym = *r->sym_ptr_ptr;
3137 if (!sym_exists_at (syms, opdsymend, symcount,
3138 sym->section->id, sym->value + r->addend))
3139 {
3140 size_t len;
3141
3142 *s = *syms[i];
3143 s->flags |= BSF_SYNTHETIC;
3144 s->section = sym->section;
3145 s->value = sym->value + r->addend;
3146 s->name = names;
3147 *names++ = '.';
3148 len = strlen (syms[i]->name);
3149 memcpy (names, syms[i]->name, len + 1);
3150 names += len + 1;
3151 /* Have udata.p point back to the original symbol this
3152 synthetic symbol was derived from. */
3153 s->udata.p = syms[i];
3154 s++;
3155 }
3156 }
3157 }
3158 else
3159 {
3160 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3161 bfd_byte *contents;
3162 size_t size;
3163 long plt_count = 0;
3164 bfd_vma glink_vma = 0, resolv_vma = 0;
3165 asection *dynamic, *glink = NULL, *relplt = NULL;
3166 arelent *p;
3167
3168 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3169 {
3170 if (contents)
3171 {
3172 free_contents_and_exit:
3173 free (contents);
3174 }
3175 count = -1;
3176 goto done;
3177 }
3178
3179 size = 0;
3180 for (i = secsymend; i < opdsymend; ++i)
3181 {
3182 bfd_vma ent;
3183
3184 /* Ignore bogus symbols. */
3185 if (syms[i]->value > opd->size - 8)
3186 continue;
3187
3188 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3189 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3190 {
3191 ++count;
3192 size += sizeof (asymbol);
3193 size += strlen (syms[i]->name) + 2;
3194 }
3195 }
3196
3197 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3198 if (dyn_count != 0
3199 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3200 {
3201 bfd_byte *dynbuf, *extdyn, *extdynend;
3202 size_t extdynsize;
3203 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3204
3205 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3206 goto free_contents_and_exit;
3207
3208 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3209 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3210
3211 extdyn = dynbuf;
3212 extdynend = extdyn + dynamic->size;
3213 for (; extdyn < extdynend; extdyn += extdynsize)
3214 {
3215 Elf_Internal_Dyn dyn;
3216 (*swap_dyn_in) (abfd, extdyn, &dyn);
3217
3218 if (dyn.d_tag == DT_NULL)
3219 break;
3220
3221 if (dyn.d_tag == DT_PPC64_GLINK)
3222 {
3223 /* The first glink stub starts at offset 32; see comment in
3224 ppc64_elf_finish_dynamic_sections. */
3225 glink_vma = dyn.d_un.d_val + 32;
3226 /* The .glink section usually does not survive the final
3227 link; search for the section (usually .text) where the
3228 glink stubs now reside. */
3229 glink = bfd_sections_find_if (abfd, section_covers_vma,
3230 &glink_vma);
3231 break;
3232 }
3233 }
3234
3235 free (dynbuf);
3236 }
3237
3238 if (glink != NULL)
3239 {
3240 /* Determine __glink trampoline by reading the relative branch
3241 from the first glink stub. */
3242 bfd_byte buf[4];
3243 if (bfd_get_section_contents (abfd, glink, buf,
3244 glink_vma + 4 - glink->vma, 4))
3245 {
3246 unsigned int insn = bfd_get_32 (abfd, buf);
3247 insn ^= B_DOT;
3248 if ((insn & ~0x3fffffc) == 0)
3249 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3250 }
3251
3252 if (resolv_vma)
3253 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3254
3255 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3256 if (relplt != NULL)
3257 {
3258 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3259 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3260 goto free_contents_and_exit;
3261
3262 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3263 size += plt_count * sizeof (asymbol);
3264
3265 p = relplt->relocation;
3266 for (i = 0; i < plt_count; i++, p++)
3267 {
3268 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3269 if (p->addend != 0)
3270 size += sizeof ("+0x") - 1 + 16;
3271 }
3272 }
3273 }
3274
3275 s = *ret = bfd_malloc (size);
3276 if (s == NULL)
3277 goto free_contents_and_exit;
3278
3279 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3280
3281 for (i = secsymend; i < opdsymend; ++i)
3282 {
3283 bfd_vma ent;
3284
3285 if (syms[i]->value > opd->size - 8)
3286 continue;
3287
3288 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3289 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3290 {
3291 long lo, hi;
3292 size_t len;
3293 asection *sec = abfd->sections;
3294
3295 *s = *syms[i];
3296 lo = codesecsym;
3297 hi = codesecsymend;
3298 while (lo < hi)
3299 {
3300 long mid = (lo + hi) >> 1;
3301 if (syms[mid]->section->vma < ent)
3302 lo = mid + 1;
3303 else if (syms[mid]->section->vma > ent)
3304 hi = mid;
3305 else
3306 {
3307 sec = syms[mid]->section;
3308 break;
3309 }
3310 }
3311
3312 if (lo >= hi && lo > codesecsym)
3313 sec = syms[lo - 1]->section;
3314
3315 for (; sec != NULL; sec = sec->next)
3316 {
3317 if (sec->vma > ent)
3318 break;
3319 if ((sec->flags & SEC_ALLOC) == 0
3320 || (sec->flags & SEC_LOAD) == 0)
3321 break;
3322 if ((sec->flags & SEC_CODE) != 0)
3323 s->section = sec;
3324 }
3325 s->flags |= BSF_SYNTHETIC;
3326 s->value = ent - s->section->vma;
3327 s->name = names;
3328 *names++ = '.';
3329 len = strlen (syms[i]->name);
3330 memcpy (names, syms[i]->name, len + 1);
3331 names += len + 1;
3332 /* Have udata.p point back to the original symbol this
3333 synthetic symbol was derived from. */
3334 s->udata.p = syms[i];
3335 s++;
3336 }
3337 }
3338 free (contents);
3339
3340 if (glink != NULL && relplt != NULL)
3341 {
3342 if (resolv_vma)
3343 {
3344 /* Add a symbol for the main glink trampoline. */
3345 memset (s, 0, sizeof *s);
3346 s->the_bfd = abfd;
3347 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3348 s->section = glink;
3349 s->value = resolv_vma - glink->vma;
3350 s->name = names;
3351 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3352 names += sizeof ("__glink_PLTresolve");
3353 s++;
3354 count++;
3355 }
3356
3357 /* FIXME: It would be very much nicer to put sym@plt on the
3358 stub rather than on the glink branch table entry. The
3359 objdump disassembler would then use a sensible symbol
3360 name on plt calls. The difficulty in doing so is
3361 a) finding the stubs, and,
3362 b) matching stubs against plt entries, and,
3363 c) there can be multiple stubs for a given plt entry.
3364
3365 Solving (a) could be done by code scanning, but older
3366 ppc64 binaries used different stubs to current code.
3367 (b) is the tricky one since you need to known the toc
3368 pointer for at least one function that uses a pic stub to
3369 be able to calculate the plt address referenced.
3370 (c) means gdb would need to set multiple breakpoints (or
3371 find the glink branch itself) when setting breakpoints
3372 for pending shared library loads. */
3373 p = relplt->relocation;
3374 for (i = 0; i < plt_count; i++, p++)
3375 {
3376 size_t len;
3377
3378 *s = **p->sym_ptr_ptr;
3379 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3380 we are defining a symbol, ensure one of them is set. */
3381 if ((s->flags & BSF_LOCAL) == 0)
3382 s->flags |= BSF_GLOBAL;
3383 s->flags |= BSF_SYNTHETIC;
3384 s->section = glink;
3385 s->value = glink_vma - glink->vma;
3386 s->name = names;
3387 s->udata.p = NULL;
3388 len = strlen ((*p->sym_ptr_ptr)->name);
3389 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3390 names += len;
3391 if (p->addend != 0)
3392 {
3393 memcpy (names, "+0x", sizeof ("+0x") - 1);
3394 names += sizeof ("+0x") - 1;
3395 bfd_sprintf_vma (abfd, names, p->addend);
3396 names += strlen (names);
3397 }
3398 memcpy (names, "@plt", sizeof ("@plt"));
3399 names += sizeof ("@plt");
3400 s++;
3401 glink_vma += 8;
3402 if (i >= 0x8000)
3403 glink_vma += 4;
3404 }
3405 count += plt_count;
3406 }
3407 }
3408
3409 done:
3410 free (syms);
3411 return count;
3412 }
3413 \f
3414 /* The following functions are specific to the ELF linker, while
3415 functions above are used generally. Those named ppc64_elf_* are
3416 called by the main ELF linker code. They appear in this file more
3417 or less in the order in which they are called. eg.
3418 ppc64_elf_check_relocs is called early in the link process,
3419 ppc64_elf_finish_dynamic_sections is one of the last functions
3420 called.
3421
3422 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3423 functions have both a function code symbol and a function descriptor
3424 symbol. A call to foo in a relocatable object file looks like:
3425
3426 . .text
3427 . x:
3428 . bl .foo
3429 . nop
3430
3431 The function definition in another object file might be:
3432
3433 . .section .opd
3434 . foo: .quad .foo
3435 . .quad .TOC.@tocbase
3436 . .quad 0
3437 .
3438 . .text
3439 . .foo: blr
3440
3441 When the linker resolves the call during a static link, the branch
3442 unsurprisingly just goes to .foo and the .opd information is unused.
3443 If the function definition is in a shared library, things are a little
3444 different: The call goes via a plt call stub, the opd information gets
3445 copied to the plt, and the linker patches the nop.
3446
3447 . x:
3448 . bl .foo_stub
3449 . ld 2,40(1)
3450 .
3451 .
3452 . .foo_stub:
3453 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3454 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3455 . std 2,40(1) # this is the general idea
3456 . ld 11,0(12)
3457 . ld 2,8(12)
3458 . mtctr 11
3459 . ld 11,16(12)
3460 . bctr
3461 .
3462 . .section .plt
3463 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3464
3465 The "reloc ()" notation is supposed to indicate that the linker emits
3466 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3467 copying.
3468
3469 What are the difficulties here? Well, firstly, the relocations
3470 examined by the linker in check_relocs are against the function code
3471 sym .foo, while the dynamic relocation in the plt is emitted against
3472 the function descriptor symbol, foo. Somewhere along the line, we need
3473 to carefully copy dynamic link information from one symbol to the other.
3474 Secondly, the generic part of the elf linker will make .foo a dynamic
3475 symbol as is normal for most other backends. We need foo dynamic
3476 instead, at least for an application final link. However, when
3477 creating a shared library containing foo, we need to have both symbols
3478 dynamic so that references to .foo are satisfied during the early
3479 stages of linking. Otherwise the linker might decide to pull in a
3480 definition from some other object, eg. a static library.
3481
3482 Update: As of August 2004, we support a new convention. Function
3483 calls may use the function descriptor symbol, ie. "bl foo". This
3484 behaves exactly as "bl .foo". */
3485
3486 /* The linker needs to keep track of the number of relocs that it
3487 decides to copy as dynamic relocs in check_relocs for each symbol.
3488 This is so that it can later discard them if they are found to be
3489 unnecessary. We store the information in a field extending the
3490 regular ELF linker hash table. */
3491
3492 struct ppc_dyn_relocs
3493 {
3494 struct ppc_dyn_relocs *next;
3495
3496 /* The input section of the reloc. */
3497 asection *sec;
3498
3499 /* Total number of relocs copied for the input section. */
3500 bfd_size_type count;
3501
3502 /* Number of pc-relative relocs copied for the input section. */
3503 bfd_size_type pc_count;
3504 };
3505
3506 /* Of those relocs that might be copied as dynamic relocs, this function
3507 selects those that must be copied when linking a shared library,
3508 even when the symbol is local. */
3509
3510 static int
3511 must_be_dyn_reloc (struct bfd_link_info *info,
3512 enum elf_ppc64_reloc_type r_type)
3513 {
3514 switch (r_type)
3515 {
3516 default:
3517 return 1;
3518
3519 case R_PPC64_REL32:
3520 case R_PPC64_REL64:
3521 case R_PPC64_REL30:
3522 return 0;
3523
3524 case R_PPC64_TPREL16:
3525 case R_PPC64_TPREL16_LO:
3526 case R_PPC64_TPREL16_HI:
3527 case R_PPC64_TPREL16_HA:
3528 case R_PPC64_TPREL16_DS:
3529 case R_PPC64_TPREL16_LO_DS:
3530 case R_PPC64_TPREL16_HIGHER:
3531 case R_PPC64_TPREL16_HIGHERA:
3532 case R_PPC64_TPREL16_HIGHEST:
3533 case R_PPC64_TPREL16_HIGHESTA:
3534 case R_PPC64_TPREL64:
3535 return !info->executable;
3536 }
3537 }
3538
3539 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3540 copying dynamic variables from a shared lib into an app's dynbss
3541 section, and instead use a dynamic relocation to point into the
3542 shared lib. With code that gcc generates, it's vital that this be
3543 enabled; In the PowerPC64 ABI, the address of a function is actually
3544 the address of a function descriptor, which resides in the .opd
3545 section. gcc uses the descriptor directly rather than going via the
3546 GOT as some other ABI's do, which means that initialized function
3547 pointers must reference the descriptor. Thus, a function pointer
3548 initialized to the address of a function in a shared library will
3549 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3550 redefines the function descriptor symbol to point to the copy. This
3551 presents a problem as a plt entry for that function is also
3552 initialized from the function descriptor symbol and the copy reloc
3553 may not be initialized first. */
3554 #define ELIMINATE_COPY_RELOCS 1
3555
3556 /* Section name for stubs is the associated section name plus this
3557 string. */
3558 #define STUB_SUFFIX ".stub"
3559
3560 /* Linker stubs.
3561 ppc_stub_long_branch:
3562 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3563 destination, but a 24 bit branch in a stub section will reach.
3564 . b dest
3565
3566 ppc_stub_plt_branch:
3567 Similar to the above, but a 24 bit branch in the stub section won't
3568 reach its destination.
3569 . addis %r12,%r2,xxx@toc@ha
3570 . ld %r11,xxx@toc@l(%r12)
3571 . mtctr %r11
3572 . bctr
3573
3574 ppc_stub_plt_call:
3575 Used to call a function in a shared library. If it so happens that
3576 the plt entry referenced crosses a 64k boundary, then an extra
3577 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3578 . addis %r12,%r2,xxx@toc@ha
3579 . std %r2,40(%r1)
3580 . ld %r11,xxx+0@toc@l(%r12)
3581 . mtctr %r11
3582 . ld %r2,xxx+8@toc@l(%r12)
3583 . ld %r11,xxx+16@toc@l(%r12)
3584 . bctr
3585
3586 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3587 code to adjust the value and save r2 to support multiple toc sections.
3588 A ppc_stub_long_branch with an r2 offset looks like:
3589 . std %r2,40(%r1)
3590 . addis %r2,%r2,off@ha
3591 . addi %r2,%r2,off@l
3592 . b dest
3593
3594 A ppc_stub_plt_branch with an r2 offset looks like:
3595 . std %r2,40(%r1)
3596 . addis %r12,%r2,xxx@toc@ha
3597 . ld %r11,xxx@toc@l(%r12)
3598 . addis %r2,%r2,off@ha
3599 . addi %r2,%r2,off@l
3600 . mtctr %r11
3601 . bctr
3602
3603 In cases where the "addis" instruction would add zero, the "addis" is
3604 omitted and following instructions modified slightly in some cases.
3605 */
3606
3607 enum ppc_stub_type {
3608 ppc_stub_none,
3609 ppc_stub_long_branch,
3610 ppc_stub_long_branch_r2off,
3611 ppc_stub_plt_branch,
3612 ppc_stub_plt_branch_r2off,
3613 ppc_stub_plt_call
3614 };
3615
3616 struct ppc_stub_hash_entry {
3617
3618 /* Base hash table entry structure. */
3619 struct bfd_hash_entry root;
3620
3621 enum ppc_stub_type stub_type;
3622
3623 /* The stub section. */
3624 asection *stub_sec;
3625
3626 /* Offset within stub_sec of the beginning of this stub. */
3627 bfd_vma stub_offset;
3628
3629 /* Given the symbol's value and its section we can determine its final
3630 value when building the stubs (so the stub knows where to jump. */
3631 bfd_vma target_value;
3632 asection *target_section;
3633
3634 /* The symbol table entry, if any, that this was derived from. */
3635 struct ppc_link_hash_entry *h;
3636 struct plt_entry *plt_ent;
3637
3638 /* And the reloc addend that this was derived from. */
3639 bfd_vma addend;
3640
3641 /* Where this stub is being called from, or, in the case of combined
3642 stub sections, the first input section in the group. */
3643 asection *id_sec;
3644 };
3645
3646 struct ppc_branch_hash_entry {
3647
3648 /* Base hash table entry structure. */
3649 struct bfd_hash_entry root;
3650
3651 /* Offset within branch lookup table. */
3652 unsigned int offset;
3653
3654 /* Generation marker. */
3655 unsigned int iter;
3656 };
3657
3658 struct ppc_link_hash_entry
3659 {
3660 struct elf_link_hash_entry elf;
3661
3662 union {
3663 /* A pointer to the most recently used stub hash entry against this
3664 symbol. */
3665 struct ppc_stub_hash_entry *stub_cache;
3666
3667 /* A pointer to the next symbol starting with a '.' */
3668 struct ppc_link_hash_entry *next_dot_sym;
3669 } u;
3670
3671 /* Track dynamic relocs copied for this symbol. */
3672 struct ppc_dyn_relocs *dyn_relocs;
3673
3674 /* Link between function code and descriptor symbols. */
3675 struct ppc_link_hash_entry *oh;
3676
3677 /* Flag function code and descriptor symbols. */
3678 unsigned int is_func:1;
3679 unsigned int is_func_descriptor:1;
3680 unsigned int fake:1;
3681
3682 /* Whether global opd/toc sym has been adjusted or not.
3683 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3684 should be set for all globals defined in any opd/toc section. */
3685 unsigned int adjust_done:1;
3686
3687 /* Set if we twiddled this symbol to weak at some stage. */
3688 unsigned int was_undefined:1;
3689
3690 /* Contexts in which symbol is used in the GOT (or TOC).
3691 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3692 corresponding relocs are encountered during check_relocs.
3693 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3694 indicate the corresponding GOT entry type is not needed.
3695 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3696 a TPREL one. We use a separate flag rather than setting TPREL
3697 just for convenience in distinguishing the two cases. */
3698 #define TLS_GD 1 /* GD reloc. */
3699 #define TLS_LD 2 /* LD reloc. */
3700 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3701 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3702 #define TLS_TLS 16 /* Any TLS reloc. */
3703 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3704 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3705 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3706 unsigned char tls_mask;
3707 };
3708
3709 /* ppc64 ELF linker hash table. */
3710
3711 struct ppc_link_hash_table
3712 {
3713 struct elf_link_hash_table elf;
3714
3715 /* The stub hash table. */
3716 struct bfd_hash_table stub_hash_table;
3717
3718 /* Another hash table for plt_branch stubs. */
3719 struct bfd_hash_table branch_hash_table;
3720
3721 /* Linker stub bfd. */
3722 bfd *stub_bfd;
3723
3724 /* Linker call-backs. */
3725 asection * (*add_stub_section) (const char *, asection *);
3726 void (*layout_sections_again) (void);
3727
3728 /* Array to keep track of which stub sections have been created, and
3729 information on stub grouping. */
3730 struct map_stub {
3731 /* This is the section to which stubs in the group will be attached. */
3732 asection *link_sec;
3733 /* The stub section. */
3734 asection *stub_sec;
3735 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3736 bfd_vma toc_off;
3737 } *stub_group;
3738
3739 /* Temp used when calculating TOC pointers. */
3740 bfd_vma toc_curr;
3741 bfd *toc_bfd;
3742 asection *toc_first_sec;
3743
3744 /* Highest input section id. */
3745 int top_id;
3746
3747 /* Highest output section index. */
3748 int top_index;
3749
3750 /* Used when adding symbols. */
3751 struct ppc_link_hash_entry *dot_syms;
3752
3753 /* List of input sections for each output section. */
3754 asection **input_list;
3755
3756 /* Short-cuts to get to dynamic linker sections. */
3757 asection *got;
3758 asection *plt;
3759 asection *relplt;
3760 asection *iplt;
3761 asection *reliplt;
3762 asection *dynbss;
3763 asection *relbss;
3764 asection *glink;
3765 asection *sfpr;
3766 asection *brlt;
3767 asection *relbrlt;
3768
3769 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3770 struct ppc_link_hash_entry *tls_get_addr;
3771 struct ppc_link_hash_entry *tls_get_addr_fd;
3772
3773 /* The size of reliplt used by got entry relocs. */
3774 bfd_size_type got_reli_size;
3775
3776 /* Statistics. */
3777 unsigned long stub_count[ppc_stub_plt_call];
3778
3779 /* Number of stubs against global syms. */
3780 unsigned long stub_globals;
3781
3782 /* Set if we should emit symbols for stubs. */
3783 unsigned int emit_stub_syms:1;
3784
3785 /* Set if __tls_get_addr optimization should not be done. */
3786 unsigned int no_tls_get_addr_opt:1;
3787
3788 /* Support for multiple toc sections. */
3789 unsigned int do_multi_toc:1;
3790 unsigned int multi_toc_needed:1;
3791 unsigned int second_toc_pass:1;
3792 unsigned int do_toc_opt:1;
3793
3794 /* Set on error. */
3795 unsigned int stub_error:1;
3796
3797 /* Temp used by ppc64_elf_process_dot_syms. */
3798 unsigned int twiddled_syms:1;
3799
3800 /* Incremented every time we size stubs. */
3801 unsigned int stub_iteration;
3802
3803 /* Small local sym cache. */
3804 struct sym_cache sym_cache;
3805 };
3806
3807 /* Rename some of the generic section flags to better document how they
3808 are used here. */
3809
3810 /* Nonzero if this section has TLS related relocations. */
3811 #define has_tls_reloc sec_flg0
3812
3813 /* Nonzero if this section has a call to __tls_get_addr. */
3814 #define has_tls_get_addr_call sec_flg1
3815
3816 /* Nonzero if this section has any toc or got relocs. */
3817 #define has_toc_reloc sec_flg2
3818
3819 /* Nonzero if this section has a call to another section that uses
3820 the toc or got. */
3821 #define makes_toc_func_call sec_flg3
3822
3823 /* Recursion protection when determining above flag. */
3824 #define call_check_in_progress sec_flg4
3825 #define call_check_done sec_flg5
3826
3827 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3828
3829 #define ppc_hash_table(p) \
3830 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3831 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3832
3833 #define ppc_stub_hash_lookup(table, string, create, copy) \
3834 ((struct ppc_stub_hash_entry *) \
3835 bfd_hash_lookup ((table), (string), (create), (copy)))
3836
3837 #define ppc_branch_hash_lookup(table, string, create, copy) \
3838 ((struct ppc_branch_hash_entry *) \
3839 bfd_hash_lookup ((table), (string), (create), (copy)))
3840
3841 /* Create an entry in the stub hash table. */
3842
3843 static struct bfd_hash_entry *
3844 stub_hash_newfunc (struct bfd_hash_entry *entry,
3845 struct bfd_hash_table *table,
3846 const char *string)
3847 {
3848 /* Allocate the structure if it has not already been allocated by a
3849 subclass. */
3850 if (entry == NULL)
3851 {
3852 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3853 if (entry == NULL)
3854 return entry;
3855 }
3856
3857 /* Call the allocation method of the superclass. */
3858 entry = bfd_hash_newfunc (entry, table, string);
3859 if (entry != NULL)
3860 {
3861 struct ppc_stub_hash_entry *eh;
3862
3863 /* Initialize the local fields. */
3864 eh = (struct ppc_stub_hash_entry *) entry;
3865 eh->stub_type = ppc_stub_none;
3866 eh->stub_sec = NULL;
3867 eh->stub_offset = 0;
3868 eh->target_value = 0;
3869 eh->target_section = NULL;
3870 eh->h = NULL;
3871 eh->id_sec = NULL;
3872 }
3873
3874 return entry;
3875 }
3876
3877 /* Create an entry in the branch hash table. */
3878
3879 static struct bfd_hash_entry *
3880 branch_hash_newfunc (struct bfd_hash_entry *entry,
3881 struct bfd_hash_table *table,
3882 const char *string)
3883 {
3884 /* Allocate the structure if it has not already been allocated by a
3885 subclass. */
3886 if (entry == NULL)
3887 {
3888 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3889 if (entry == NULL)
3890 return entry;
3891 }
3892
3893 /* Call the allocation method of the superclass. */
3894 entry = bfd_hash_newfunc (entry, table, string);
3895 if (entry != NULL)
3896 {
3897 struct ppc_branch_hash_entry *eh;
3898
3899 /* Initialize the local fields. */
3900 eh = (struct ppc_branch_hash_entry *) entry;
3901 eh->offset = 0;
3902 eh->iter = 0;
3903 }
3904
3905 return entry;
3906 }
3907
3908 /* Create an entry in a ppc64 ELF linker hash table. */
3909
3910 static struct bfd_hash_entry *
3911 link_hash_newfunc (struct bfd_hash_entry *entry,
3912 struct bfd_hash_table *table,
3913 const char *string)
3914 {
3915 /* Allocate the structure if it has not already been allocated by a
3916 subclass. */
3917 if (entry == NULL)
3918 {
3919 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3920 if (entry == NULL)
3921 return entry;
3922 }
3923
3924 /* Call the allocation method of the superclass. */
3925 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3926 if (entry != NULL)
3927 {
3928 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3929
3930 memset (&eh->u.stub_cache, 0,
3931 (sizeof (struct ppc_link_hash_entry)
3932 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3933
3934 /* When making function calls, old ABI code references function entry
3935 points (dot symbols), while new ABI code references the function
3936 descriptor symbol. We need to make any combination of reference and
3937 definition work together, without breaking archive linking.
3938
3939 For a defined function "foo" and an undefined call to "bar":
3940 An old object defines "foo" and ".foo", references ".bar" (possibly
3941 "bar" too).
3942 A new object defines "foo" and references "bar".
3943
3944 A new object thus has no problem with its undefined symbols being
3945 satisfied by definitions in an old object. On the other hand, the
3946 old object won't have ".bar" satisfied by a new object.
3947
3948 Keep a list of newly added dot-symbols. */
3949
3950 if (string[0] == '.')
3951 {
3952 struct ppc_link_hash_table *htab;
3953
3954 htab = (struct ppc_link_hash_table *) table;
3955 eh->u.next_dot_sym = htab->dot_syms;
3956 htab->dot_syms = eh;
3957 }
3958 }
3959
3960 return entry;
3961 }
3962
3963 /* Create a ppc64 ELF linker hash table. */
3964
3965 static struct bfd_link_hash_table *
3966 ppc64_elf_link_hash_table_create (bfd *abfd)
3967 {
3968 struct ppc_link_hash_table *htab;
3969 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3970
3971 htab = bfd_zmalloc (amt);
3972 if (htab == NULL)
3973 return NULL;
3974
3975 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3976 sizeof (struct ppc_link_hash_entry),
3977 PPC64_ELF_DATA))
3978 {
3979 free (htab);
3980 return NULL;
3981 }
3982
3983 /* Init the stub hash table too. */
3984 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3985 sizeof (struct ppc_stub_hash_entry)))
3986 return NULL;
3987
3988 /* And the branch hash table. */
3989 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3990 sizeof (struct ppc_branch_hash_entry)))
3991 return NULL;
3992
3993 /* Initializing two fields of the union is just cosmetic. We really
3994 only care about glist, but when compiled on a 32-bit host the
3995 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3996 debugger inspection of these fields look nicer. */
3997 htab->elf.init_got_refcount.refcount = 0;
3998 htab->elf.init_got_refcount.glist = NULL;
3999 htab->elf.init_plt_refcount.refcount = 0;
4000 htab->elf.init_plt_refcount.glist = NULL;
4001 htab->elf.init_got_offset.offset = 0;
4002 htab->elf.init_got_offset.glist = NULL;
4003 htab->elf.init_plt_offset.offset = 0;
4004 htab->elf.init_plt_offset.glist = NULL;
4005
4006 return &htab->elf.root;
4007 }
4008
4009 /* Free the derived linker hash table. */
4010
4011 static void
4012 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
4013 {
4014 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
4015
4016 bfd_hash_table_free (&ret->stub_hash_table);
4017 bfd_hash_table_free (&ret->branch_hash_table);
4018 _bfd_generic_link_hash_table_free (hash);
4019 }
4020
4021 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
4022
4023 void
4024 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
4025 {
4026 struct ppc_link_hash_table *htab;
4027
4028 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4029
4030 /* Always hook our dynamic sections into the first bfd, which is the
4031 linker created stub bfd. This ensures that the GOT header is at
4032 the start of the output TOC section. */
4033 htab = ppc_hash_table (info);
4034 if (htab == NULL)
4035 return;
4036 htab->stub_bfd = abfd;
4037 htab->elf.dynobj = abfd;
4038 }
4039
4040 /* Build a name for an entry in the stub hash table. */
4041
4042 static char *
4043 ppc_stub_name (const asection *input_section,
4044 const asection *sym_sec,
4045 const struct ppc_link_hash_entry *h,
4046 const Elf_Internal_Rela *rel)
4047 {
4048 char *stub_name;
4049 bfd_size_type len;
4050
4051 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4052 offsets from a sym as a branch target? In fact, we could
4053 probably assume the addend is always zero. */
4054 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4055
4056 if (h)
4057 {
4058 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4059 stub_name = bfd_malloc (len);
4060 if (stub_name == NULL)
4061 return stub_name;
4062
4063 sprintf (stub_name, "%08x.%s+%x",
4064 input_section->id & 0xffffffff,
4065 h->elf.root.root.string,
4066 (int) rel->r_addend & 0xffffffff);
4067 }
4068 else
4069 {
4070 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4071 stub_name = bfd_malloc (len);
4072 if (stub_name == NULL)
4073 return stub_name;
4074
4075 sprintf (stub_name, "%08x.%x:%x+%x",
4076 input_section->id & 0xffffffff,
4077 sym_sec->id & 0xffffffff,
4078 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4079 (int) rel->r_addend & 0xffffffff);
4080 }
4081 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4082 stub_name[len - 2] = 0;
4083 return stub_name;
4084 }
4085
4086 /* Look up an entry in the stub hash. Stub entries are cached because
4087 creating the stub name takes a bit of time. */
4088
4089 static struct ppc_stub_hash_entry *
4090 ppc_get_stub_entry (const asection *input_section,
4091 const asection *sym_sec,
4092 struct ppc_link_hash_entry *h,
4093 const Elf_Internal_Rela *rel,
4094 struct ppc_link_hash_table *htab)
4095 {
4096 struct ppc_stub_hash_entry *stub_entry;
4097 const asection *id_sec;
4098
4099 /* If this input section is part of a group of sections sharing one
4100 stub section, then use the id of the first section in the group.
4101 Stub names need to include a section id, as there may well be
4102 more than one stub used to reach say, printf, and we need to
4103 distinguish between them. */
4104 id_sec = htab->stub_group[input_section->id].link_sec;
4105
4106 if (h != NULL && h->u.stub_cache != NULL
4107 && h->u.stub_cache->h == h
4108 && h->u.stub_cache->id_sec == id_sec)
4109 {
4110 stub_entry = h->u.stub_cache;
4111 }
4112 else
4113 {
4114 char *stub_name;
4115
4116 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4117 if (stub_name == NULL)
4118 return NULL;
4119
4120 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4121 stub_name, FALSE, FALSE);
4122 if (h != NULL)
4123 h->u.stub_cache = stub_entry;
4124
4125 free (stub_name);
4126 }
4127
4128 return stub_entry;
4129 }
4130
4131 /* Add a new stub entry to the stub hash. Not all fields of the new
4132 stub entry are initialised. */
4133
4134 static struct ppc_stub_hash_entry *
4135 ppc_add_stub (const char *stub_name,
4136 asection *section,
4137 struct ppc_link_hash_table *htab)
4138 {
4139 asection *link_sec;
4140 asection *stub_sec;
4141 struct ppc_stub_hash_entry *stub_entry;
4142
4143 link_sec = htab->stub_group[section->id].link_sec;
4144 stub_sec = htab->stub_group[section->id].stub_sec;
4145 if (stub_sec == NULL)
4146 {
4147 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4148 if (stub_sec == NULL)
4149 {
4150 size_t namelen;
4151 bfd_size_type len;
4152 char *s_name;
4153
4154 namelen = strlen (link_sec->name);
4155 len = namelen + sizeof (STUB_SUFFIX);
4156 s_name = bfd_alloc (htab->stub_bfd, len);
4157 if (s_name == NULL)
4158 return NULL;
4159
4160 memcpy (s_name, link_sec->name, namelen);
4161 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4162 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4163 if (stub_sec == NULL)
4164 return NULL;
4165 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4166 }
4167 htab->stub_group[section->id].stub_sec = stub_sec;
4168 }
4169
4170 /* Enter this entry into the linker stub hash table. */
4171 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4172 TRUE, FALSE);
4173 if (stub_entry == NULL)
4174 {
4175 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4176 section->owner, stub_name);
4177 return NULL;
4178 }
4179
4180 stub_entry->stub_sec = stub_sec;
4181 stub_entry->stub_offset = 0;
4182 stub_entry->id_sec = link_sec;
4183 return stub_entry;
4184 }
4185
4186 /* Create sections for linker generated code. */
4187
4188 static bfd_boolean
4189 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4190 {
4191 struct ppc_link_hash_table *htab;
4192 flagword flags;
4193
4194 htab = ppc_hash_table (info);
4195 if (htab == NULL)
4196 return FALSE;
4197
4198 /* Create .sfpr for code to save and restore fp regs. */
4199 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4200 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4201 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4202 flags);
4203 if (htab->sfpr == NULL
4204 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4205 return FALSE;
4206
4207 /* Create .glink for lazy dynamic linking support. */
4208 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4209 flags);
4210 if (htab->glink == NULL
4211 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4212 return FALSE;
4213
4214 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4215 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4216 if (htab->iplt == NULL
4217 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4218 return FALSE;
4219
4220 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4221 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4222 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4223 ".rela.iplt",
4224 flags);
4225 if (htab->reliplt == NULL
4226 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4227 return FALSE;
4228
4229 /* Create branch lookup table for plt_branch stubs. */
4230 flags = (SEC_ALLOC | SEC_LOAD
4231 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4232 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4233 flags);
4234 if (htab->brlt == NULL
4235 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4236 return FALSE;
4237
4238 if (!info->shared)
4239 return TRUE;
4240
4241 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4242 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4243 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4244 ".rela.branch_lt",
4245 flags);
4246 if (htab->relbrlt == NULL
4247 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4248 return FALSE;
4249
4250 return TRUE;
4251 }
4252
4253 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4254 not already done. */
4255
4256 static bfd_boolean
4257 create_got_section (bfd *abfd, struct bfd_link_info *info)
4258 {
4259 asection *got, *relgot;
4260 flagword flags;
4261 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4262
4263 if (!is_ppc64_elf (abfd))
4264 return FALSE;
4265 if (htab == NULL)
4266 return FALSE;
4267
4268 if (!htab->got)
4269 {
4270 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4271 return FALSE;
4272
4273 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4274 if (!htab->got)
4275 abort ();
4276 }
4277
4278 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4279 | SEC_LINKER_CREATED);
4280
4281 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4282 if (!got
4283 || !bfd_set_section_alignment (abfd, got, 3))
4284 return FALSE;
4285
4286 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4287 flags | SEC_READONLY);
4288 if (!relgot
4289 || ! bfd_set_section_alignment (abfd, relgot, 3))
4290 return FALSE;
4291
4292 ppc64_elf_tdata (abfd)->got = got;
4293 ppc64_elf_tdata (abfd)->relgot = relgot;
4294 return TRUE;
4295 }
4296
4297 /* Create the dynamic sections, and set up shortcuts. */
4298
4299 static bfd_boolean
4300 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4301 {
4302 struct ppc_link_hash_table *htab;
4303
4304 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4305 return FALSE;
4306
4307 htab = ppc_hash_table (info);
4308 if (htab == NULL)
4309 return FALSE;
4310
4311 if (!htab->got)
4312 htab->got = bfd_get_section_by_name (dynobj, ".got");
4313 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4314 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4315 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4316 if (!info->shared)
4317 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4318
4319 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4320 || (!info->shared && !htab->relbss))
4321 abort ();
4322
4323 return TRUE;
4324 }
4325
4326 /* Follow indirect and warning symbol links. */
4327
4328 static inline struct bfd_link_hash_entry *
4329 follow_link (struct bfd_link_hash_entry *h)
4330 {
4331 while (h->type == bfd_link_hash_indirect
4332 || h->type == bfd_link_hash_warning)
4333 h = h->u.i.link;
4334 return h;
4335 }
4336
4337 static inline struct elf_link_hash_entry *
4338 elf_follow_link (struct elf_link_hash_entry *h)
4339 {
4340 return (struct elf_link_hash_entry *) follow_link (&h->root);
4341 }
4342
4343 static inline struct ppc_link_hash_entry *
4344 ppc_follow_link (struct ppc_link_hash_entry *h)
4345 {
4346 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4347 }
4348
4349 /* Merge PLT info on FROM with that on TO. */
4350
4351 static void
4352 move_plt_plist (struct ppc_link_hash_entry *from,
4353 struct ppc_link_hash_entry *to)
4354 {
4355 if (from->elf.plt.plist != NULL)
4356 {
4357 if (to->elf.plt.plist != NULL)
4358 {
4359 struct plt_entry **entp;
4360 struct plt_entry *ent;
4361
4362 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4363 {
4364 struct plt_entry *dent;
4365
4366 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4367 if (dent->addend == ent->addend)
4368 {
4369 dent->plt.refcount += ent->plt.refcount;
4370 *entp = ent->next;
4371 break;
4372 }
4373 if (dent == NULL)
4374 entp = &ent->next;
4375 }
4376 *entp = to->elf.plt.plist;
4377 }
4378
4379 to->elf.plt.plist = from->elf.plt.plist;
4380 from->elf.plt.plist = NULL;
4381 }
4382 }
4383
4384 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4385
4386 static void
4387 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4388 struct elf_link_hash_entry *dir,
4389 struct elf_link_hash_entry *ind)
4390 {
4391 struct ppc_link_hash_entry *edir, *eind;
4392
4393 edir = (struct ppc_link_hash_entry *) dir;
4394 eind = (struct ppc_link_hash_entry *) ind;
4395
4396 /* Copy over any dynamic relocs we may have on the indirect sym. */
4397 if (eind->dyn_relocs != NULL)
4398 {
4399 if (edir->dyn_relocs != NULL)
4400 {
4401 struct ppc_dyn_relocs **pp;
4402 struct ppc_dyn_relocs *p;
4403
4404 /* Add reloc counts against the indirect sym to the direct sym
4405 list. Merge any entries against the same section. */
4406 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4407 {
4408 struct ppc_dyn_relocs *q;
4409
4410 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4411 if (q->sec == p->sec)
4412 {
4413 q->pc_count += p->pc_count;
4414 q->count += p->count;
4415 *pp = p->next;
4416 break;
4417 }
4418 if (q == NULL)
4419 pp = &p->next;
4420 }
4421 *pp = edir->dyn_relocs;
4422 }
4423
4424 edir->dyn_relocs = eind->dyn_relocs;
4425 eind->dyn_relocs = NULL;
4426 }
4427
4428 edir->is_func |= eind->is_func;
4429 edir->is_func_descriptor |= eind->is_func_descriptor;
4430 edir->tls_mask |= eind->tls_mask;
4431 if (eind->oh != NULL)
4432 edir->oh = ppc_follow_link (eind->oh);
4433
4434 /* If called to transfer flags for a weakdef during processing
4435 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4436 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4437 if (!(ELIMINATE_COPY_RELOCS
4438 && eind->elf.root.type != bfd_link_hash_indirect
4439 && edir->elf.dynamic_adjusted))
4440 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4441
4442 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4443 edir->elf.ref_regular |= eind->elf.ref_regular;
4444 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4445 edir->elf.needs_plt |= eind->elf.needs_plt;
4446
4447 /* If we were called to copy over info for a weak sym, that's all. */
4448 if (eind->elf.root.type != bfd_link_hash_indirect)
4449 return;
4450
4451 /* Copy over got entries that we may have already seen to the
4452 symbol which just became indirect. */
4453 if (eind->elf.got.glist != NULL)
4454 {
4455 if (edir->elf.got.glist != NULL)
4456 {
4457 struct got_entry **entp;
4458 struct got_entry *ent;
4459
4460 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4461 {
4462 struct got_entry *dent;
4463
4464 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4465 if (dent->addend == ent->addend
4466 && dent->owner == ent->owner
4467 && dent->tls_type == ent->tls_type)
4468 {
4469 dent->got.refcount += ent->got.refcount;
4470 *entp = ent->next;
4471 break;
4472 }
4473 if (dent == NULL)
4474 entp = &ent->next;
4475 }
4476 *entp = edir->elf.got.glist;
4477 }
4478
4479 edir->elf.got.glist = eind->elf.got.glist;
4480 eind->elf.got.glist = NULL;
4481 }
4482
4483 /* And plt entries. */
4484 move_plt_plist (eind, edir);
4485
4486 if (eind->elf.dynindx != -1)
4487 {
4488 if (edir->elf.dynindx != -1)
4489 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4490 edir->elf.dynstr_index);
4491 edir->elf.dynindx = eind->elf.dynindx;
4492 edir->elf.dynstr_index = eind->elf.dynstr_index;
4493 eind->elf.dynindx = -1;
4494 eind->elf.dynstr_index = 0;
4495 }
4496 }
4497
4498 /* Find the function descriptor hash entry from the given function code
4499 hash entry FH. Link the entries via their OH fields. */
4500
4501 static struct ppc_link_hash_entry *
4502 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4503 {
4504 struct ppc_link_hash_entry *fdh = fh->oh;
4505
4506 if (fdh == NULL)
4507 {
4508 const char *fd_name = fh->elf.root.root.string + 1;
4509
4510 fdh = (struct ppc_link_hash_entry *)
4511 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4512 if (fdh == NULL)
4513 return fdh;
4514
4515 fdh->is_func_descriptor = 1;
4516 fdh->oh = fh;
4517 fh->is_func = 1;
4518 fh->oh = fdh;
4519 }
4520
4521 return ppc_follow_link (fdh);
4522 }
4523
4524 /* Make a fake function descriptor sym for the code sym FH. */
4525
4526 static struct ppc_link_hash_entry *
4527 make_fdh (struct bfd_link_info *info,
4528 struct ppc_link_hash_entry *fh)
4529 {
4530 bfd *abfd;
4531 asymbol *newsym;
4532 struct bfd_link_hash_entry *bh;
4533 struct ppc_link_hash_entry *fdh;
4534
4535 abfd = fh->elf.root.u.undef.abfd;
4536 newsym = bfd_make_empty_symbol (abfd);
4537 newsym->name = fh->elf.root.root.string + 1;
4538 newsym->section = bfd_und_section_ptr;
4539 newsym->value = 0;
4540 newsym->flags = BSF_WEAK;
4541
4542 bh = NULL;
4543 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4544 newsym->flags, newsym->section,
4545 newsym->value, NULL, FALSE, FALSE,
4546 &bh))
4547 return NULL;
4548
4549 fdh = (struct ppc_link_hash_entry *) bh;
4550 fdh->elf.non_elf = 0;
4551 fdh->fake = 1;
4552 fdh->is_func_descriptor = 1;
4553 fdh->oh = fh;
4554 fh->is_func = 1;
4555 fh->oh = fdh;
4556 return fdh;
4557 }
4558
4559 /* Fix function descriptor symbols defined in .opd sections to be
4560 function type. */
4561
4562 static bfd_boolean
4563 ppc64_elf_add_symbol_hook (bfd *ibfd,
4564 struct bfd_link_info *info,
4565 Elf_Internal_Sym *isym,
4566 const char **name ATTRIBUTE_UNUSED,
4567 flagword *flags ATTRIBUTE_UNUSED,
4568 asection **sec,
4569 bfd_vma *value ATTRIBUTE_UNUSED)
4570 {
4571 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4572 {
4573 if ((ibfd->flags & DYNAMIC) == 0)
4574 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4575 }
4576 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4577 ;
4578 else if (*sec != NULL
4579 && strcmp ((*sec)->name, ".opd") == 0)
4580 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4581
4582 return TRUE;
4583 }
4584
4585 /* This function makes an old ABI object reference to ".bar" cause the
4586 inclusion of a new ABI object archive that defines "bar".
4587 NAME is a symbol defined in an archive. Return a symbol in the hash
4588 table that might be satisfied by the archive symbols. */
4589
4590 static struct elf_link_hash_entry *
4591 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4592 struct bfd_link_info *info,
4593 const char *name)
4594 {
4595 struct elf_link_hash_entry *h;
4596 char *dot_name;
4597 size_t len;
4598
4599 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4600 if (h != NULL
4601 /* Don't return this sym if it is a fake function descriptor
4602 created by add_symbol_adjust. */
4603 && !(h->root.type == bfd_link_hash_undefweak
4604 && ((struct ppc_link_hash_entry *) h)->fake))
4605 return h;
4606
4607 if (name[0] == '.')
4608 return h;
4609
4610 len = strlen (name);
4611 dot_name = bfd_alloc (abfd, len + 2);
4612 if (dot_name == NULL)
4613 return (struct elf_link_hash_entry *) 0 - 1;
4614 dot_name[0] = '.';
4615 memcpy (dot_name + 1, name, len + 1);
4616 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4617 bfd_release (abfd, dot_name);
4618 return h;
4619 }
4620
4621 /* This function satisfies all old ABI object references to ".bar" if a
4622 new ABI object defines "bar". Well, at least, undefined dot symbols
4623 are made weak. This stops later archive searches from including an
4624 object if we already have a function descriptor definition. It also
4625 prevents the linker complaining about undefined symbols.
4626 We also check and correct mismatched symbol visibility here. The
4627 most restrictive visibility of the function descriptor and the
4628 function entry symbol is used. */
4629
4630 static bfd_boolean
4631 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4632 {
4633 struct ppc_link_hash_table *htab;
4634 struct ppc_link_hash_entry *fdh;
4635
4636 if (eh->elf.root.type == bfd_link_hash_indirect)
4637 return TRUE;
4638
4639 if (eh->elf.root.type == bfd_link_hash_warning)
4640 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4641
4642 if (eh->elf.root.root.string[0] != '.')
4643 abort ();
4644
4645 htab = ppc_hash_table (info);
4646 if (htab == NULL)
4647 return FALSE;
4648
4649 fdh = lookup_fdh (eh, htab);
4650 if (fdh == NULL)
4651 {
4652 if (!info->relocatable
4653 && (eh->elf.root.type == bfd_link_hash_undefined
4654 || eh->elf.root.type == bfd_link_hash_undefweak)
4655 && eh->elf.ref_regular)
4656 {
4657 /* Make an undefweak function descriptor sym, which is enough to
4658 pull in an --as-needed shared lib, but won't cause link
4659 errors. Archives are handled elsewhere. */
4660 fdh = make_fdh (info, eh);
4661 if (fdh == NULL)
4662 return FALSE;
4663 fdh->elf.ref_regular = 1;
4664 }
4665 }
4666 else
4667 {
4668 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4669 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4670 if (entry_vis < descr_vis)
4671 fdh->elf.other += entry_vis - descr_vis;
4672 else if (entry_vis > descr_vis)
4673 eh->elf.other += descr_vis - entry_vis;
4674
4675 if ((fdh->elf.root.type == bfd_link_hash_defined
4676 || fdh->elf.root.type == bfd_link_hash_defweak)
4677 && eh->elf.root.type == bfd_link_hash_undefined)
4678 {
4679 eh->elf.root.type = bfd_link_hash_undefweak;
4680 eh->was_undefined = 1;
4681 htab->twiddled_syms = 1;
4682 }
4683 }
4684
4685 return TRUE;
4686 }
4687
4688 /* Process list of dot-symbols we made in link_hash_newfunc. */
4689
4690 static bfd_boolean
4691 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4692 {
4693 struct ppc_link_hash_table *htab;
4694 struct ppc_link_hash_entry **p, *eh;
4695
4696 if (!is_ppc64_elf (info->output_bfd))
4697 return TRUE;
4698 htab = ppc_hash_table (info);
4699 if (htab == NULL)
4700 return FALSE;
4701
4702 if (is_ppc64_elf (ibfd))
4703 {
4704 p = &htab->dot_syms;
4705 while ((eh = *p) != NULL)
4706 {
4707 *p = NULL;
4708 if (!add_symbol_adjust (eh, info))
4709 return FALSE;
4710 p = &eh->u.next_dot_sym;
4711 }
4712 }
4713
4714 /* Clear the list for non-ppc64 input files. */
4715 p = &htab->dot_syms;
4716 while ((eh = *p) != NULL)
4717 {
4718 *p = NULL;
4719 p = &eh->u.next_dot_sym;
4720 }
4721
4722 /* We need to fix the undefs list for any syms we have twiddled to
4723 undef_weak. */
4724 if (htab->twiddled_syms)
4725 {
4726 bfd_link_repair_undef_list (&htab->elf.root);
4727 htab->twiddled_syms = 0;
4728 }
4729 return TRUE;
4730 }
4731
4732 /* Undo hash table changes when an --as-needed input file is determined
4733 not to be needed. */
4734
4735 static bfd_boolean
4736 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4737 struct bfd_link_info *info)
4738 {
4739 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4740
4741 if (htab == NULL)
4742 return FALSE;
4743
4744 htab->dot_syms = NULL;
4745 return TRUE;
4746 }
4747
4748 static struct plt_entry **
4749 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4750 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4751 {
4752 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4753 struct plt_entry **local_plt;
4754 unsigned char *local_got_tls_masks;
4755
4756 if (local_got_ents == NULL)
4757 {
4758 bfd_size_type size = symtab_hdr->sh_info;
4759
4760 size *= (sizeof (*local_got_ents)
4761 + sizeof (*local_plt)
4762 + sizeof (*local_got_tls_masks));
4763 local_got_ents = bfd_zalloc (abfd, size);
4764 if (local_got_ents == NULL)
4765 return NULL;
4766 elf_local_got_ents (abfd) = local_got_ents;
4767 }
4768
4769 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4770 {
4771 struct got_entry *ent;
4772
4773 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4774 if (ent->addend == r_addend
4775 && ent->owner == abfd
4776 && ent->tls_type == tls_type)
4777 break;
4778 if (ent == NULL)
4779 {
4780 bfd_size_type amt = sizeof (*ent);
4781 ent = bfd_alloc (abfd, amt);
4782 if (ent == NULL)
4783 return FALSE;
4784 ent->next = local_got_ents[r_symndx];
4785 ent->addend = r_addend;
4786 ent->owner = abfd;
4787 ent->tls_type = tls_type;
4788 ent->is_indirect = FALSE;
4789 ent->got.refcount = 0;
4790 local_got_ents[r_symndx] = ent;
4791 }
4792 ent->got.refcount += 1;
4793 }
4794
4795 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4796 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4797 local_got_tls_masks[r_symndx] |= tls_type;
4798
4799 return local_plt + r_symndx;
4800 }
4801
4802 static bfd_boolean
4803 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4804 {
4805 struct plt_entry *ent;
4806
4807 for (ent = *plist; ent != NULL; ent = ent->next)
4808 if (ent->addend == addend)
4809 break;
4810 if (ent == NULL)
4811 {
4812 bfd_size_type amt = sizeof (*ent);
4813 ent = bfd_alloc (abfd, amt);
4814 if (ent == NULL)
4815 return FALSE;
4816 ent->next = *plist;
4817 ent->addend = addend;
4818 ent->plt.refcount = 0;
4819 *plist = ent;
4820 }
4821 ent->plt.refcount += 1;
4822 return TRUE;
4823 }
4824
4825 static bfd_boolean
4826 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4827 {
4828 return (r_type == R_PPC64_REL24
4829 || r_type == R_PPC64_REL14
4830 || r_type == R_PPC64_REL14_BRTAKEN
4831 || r_type == R_PPC64_REL14_BRNTAKEN
4832 || r_type == R_PPC64_ADDR24
4833 || r_type == R_PPC64_ADDR14
4834 || r_type == R_PPC64_ADDR14_BRTAKEN
4835 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4836 }
4837
4838 /* Look through the relocs for a section during the first phase, and
4839 calculate needed space in the global offset table, procedure
4840 linkage table, and dynamic reloc sections. */
4841
4842 static bfd_boolean
4843 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4844 asection *sec, const Elf_Internal_Rela *relocs)
4845 {
4846 struct ppc_link_hash_table *htab;
4847 Elf_Internal_Shdr *symtab_hdr;
4848 struct elf_link_hash_entry **sym_hashes;
4849 const Elf_Internal_Rela *rel;
4850 const Elf_Internal_Rela *rel_end;
4851 asection *sreloc;
4852 asection **opd_sym_map;
4853 struct elf_link_hash_entry *tga, *dottga;
4854
4855 if (info->relocatable)
4856 return TRUE;
4857
4858 /* Don't do anything special with non-loaded, non-alloced sections.
4859 In particular, any relocs in such sections should not affect GOT
4860 and PLT reference counting (ie. we don't allow them to create GOT
4861 or PLT entries), there's no possibility or desire to optimize TLS
4862 relocs, and there's not much point in propagating relocs to shared
4863 libs that the dynamic linker won't relocate. */
4864 if ((sec->flags & SEC_ALLOC) == 0)
4865 return TRUE;
4866
4867 BFD_ASSERT (is_ppc64_elf (abfd));
4868
4869 htab = ppc_hash_table (info);
4870 if (htab == NULL)
4871 return FALSE;
4872
4873 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4874 FALSE, FALSE, TRUE);
4875 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4876 FALSE, FALSE, TRUE);
4877 symtab_hdr = &elf_symtab_hdr (abfd);
4878 sym_hashes = elf_sym_hashes (abfd);
4879 sreloc = NULL;
4880 opd_sym_map = NULL;
4881 if (strcmp (sec->name, ".opd") == 0)
4882 {
4883 /* Garbage collection needs some extra help with .opd sections.
4884 We don't want to necessarily keep everything referenced by
4885 relocs in .opd, as that would keep all functions. Instead,
4886 if we reference an .opd symbol (a function descriptor), we
4887 want to keep the function code symbol's section. This is
4888 easy for global symbols, but for local syms we need to keep
4889 information about the associated function section. */
4890 bfd_size_type amt;
4891
4892 amt = sec->size * sizeof (*opd_sym_map) / 8;
4893 opd_sym_map = bfd_zalloc (abfd, amt);
4894 if (opd_sym_map == NULL)
4895 return FALSE;
4896 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4897 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4898 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4899 }
4900
4901 if (htab->sfpr == NULL
4902 && !create_linkage_sections (htab->elf.dynobj, info))
4903 return FALSE;
4904
4905 rel_end = relocs + sec->reloc_count;
4906 for (rel = relocs; rel < rel_end; rel++)
4907 {
4908 unsigned long r_symndx;
4909 struct elf_link_hash_entry *h;
4910 enum elf_ppc64_reloc_type r_type;
4911 int tls_type;
4912 struct _ppc64_elf_section_data *ppc64_sec;
4913 struct plt_entry **ifunc;
4914
4915 r_symndx = ELF64_R_SYM (rel->r_info);
4916 if (r_symndx < symtab_hdr->sh_info)
4917 h = NULL;
4918 else
4919 {
4920 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4921 h = elf_follow_link (h);
4922 }
4923
4924 tls_type = 0;
4925 ifunc = NULL;
4926 if (h != NULL)
4927 {
4928 if (h->type == STT_GNU_IFUNC)
4929 {
4930 h->needs_plt = 1;
4931 ifunc = &h->plt.plist;
4932 }
4933 }
4934 else
4935 {
4936 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4937 abfd, r_symndx);
4938 if (isym == NULL)
4939 return FALSE;
4940
4941 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4942 {
4943 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4944 rel->r_addend, PLT_IFUNC);
4945 if (ifunc == NULL)
4946 return FALSE;
4947 }
4948 }
4949 r_type = ELF64_R_TYPE (rel->r_info);
4950 if (is_branch_reloc (r_type))
4951 {
4952 if (h != NULL && (h == tga || h == dottga))
4953 {
4954 if (rel != relocs
4955 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4956 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4957 /* We have a new-style __tls_get_addr call with a marker
4958 reloc. */
4959 ;
4960 else
4961 /* Mark this section as having an old-style call. */
4962 sec->has_tls_get_addr_call = 1;
4963 }
4964
4965 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4966 if (ifunc != NULL
4967 && !update_plt_info (abfd, ifunc, rel->r_addend))
4968 return FALSE;
4969 }
4970
4971 switch (r_type)
4972 {
4973 case R_PPC64_TLSGD:
4974 case R_PPC64_TLSLD:
4975 /* These special tls relocs tie a call to __tls_get_addr with
4976 its parameter symbol. */
4977 break;
4978
4979 case R_PPC64_GOT_TLSLD16:
4980 case R_PPC64_GOT_TLSLD16_LO:
4981 case R_PPC64_GOT_TLSLD16_HI:
4982 case R_PPC64_GOT_TLSLD16_HA:
4983 tls_type = TLS_TLS | TLS_LD;
4984 goto dogottls;
4985
4986 case R_PPC64_GOT_TLSGD16:
4987 case R_PPC64_GOT_TLSGD16_LO:
4988 case R_PPC64_GOT_TLSGD16_HI:
4989 case R_PPC64_GOT_TLSGD16_HA:
4990 tls_type = TLS_TLS | TLS_GD;
4991 goto dogottls;
4992
4993 case R_PPC64_GOT_TPREL16_DS:
4994 case R_PPC64_GOT_TPREL16_LO_DS:
4995 case R_PPC64_GOT_TPREL16_HI:
4996 case R_PPC64_GOT_TPREL16_HA:
4997 if (!info->executable)
4998 info->flags |= DF_STATIC_TLS;
4999 tls_type = TLS_TLS | TLS_TPREL;
5000 goto dogottls;
5001
5002 case R_PPC64_GOT_DTPREL16_DS:
5003 case R_PPC64_GOT_DTPREL16_LO_DS:
5004 case R_PPC64_GOT_DTPREL16_HI:
5005 case R_PPC64_GOT_DTPREL16_HA:
5006 tls_type = TLS_TLS | TLS_DTPREL;
5007 dogottls:
5008 sec->has_tls_reloc = 1;
5009 /* Fall thru */
5010
5011 case R_PPC64_GOT16:
5012 case R_PPC64_GOT16_DS:
5013 case R_PPC64_GOT16_HA:
5014 case R_PPC64_GOT16_HI:
5015 case R_PPC64_GOT16_LO:
5016 case R_PPC64_GOT16_LO_DS:
5017 /* This symbol requires a global offset table entry. */
5018 sec->has_toc_reloc = 1;
5019 if (r_type == R_PPC64_GOT_TLSLD16
5020 || r_type == R_PPC64_GOT_TLSGD16
5021 || r_type == R_PPC64_GOT_TPREL16_DS
5022 || r_type == R_PPC64_GOT_DTPREL16_DS
5023 || r_type == R_PPC64_GOT16
5024 || r_type == R_PPC64_GOT16_DS)
5025 {
5026 htab->do_multi_toc = 1;
5027 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5028 }
5029
5030 if (ppc64_elf_tdata (abfd)->got == NULL
5031 && !create_got_section (abfd, info))
5032 return FALSE;
5033
5034 if (h != NULL)
5035 {
5036 struct ppc_link_hash_entry *eh;
5037 struct got_entry *ent;
5038
5039 eh = (struct ppc_link_hash_entry *) h;
5040 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5041 if (ent->addend == rel->r_addend
5042 && ent->owner == abfd
5043 && ent->tls_type == tls_type)
5044 break;
5045 if (ent == NULL)
5046 {
5047 bfd_size_type amt = sizeof (*ent);
5048 ent = bfd_alloc (abfd, amt);
5049 if (ent == NULL)
5050 return FALSE;
5051 ent->next = eh->elf.got.glist;
5052 ent->addend = rel->r_addend;
5053 ent->owner = abfd;
5054 ent->tls_type = tls_type;
5055 ent->is_indirect = FALSE;
5056 ent->got.refcount = 0;
5057 eh->elf.got.glist = ent;
5058 }
5059 ent->got.refcount += 1;
5060 eh->tls_mask |= tls_type;
5061 }
5062 else
5063 /* This is a global offset table entry for a local symbol. */
5064 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5065 rel->r_addend, tls_type))
5066 return FALSE;
5067 break;
5068
5069 case R_PPC64_PLT16_HA:
5070 case R_PPC64_PLT16_HI:
5071 case R_PPC64_PLT16_LO:
5072 case R_PPC64_PLT32:
5073 case R_PPC64_PLT64:
5074 /* This symbol requires a procedure linkage table entry. We
5075 actually build the entry in adjust_dynamic_symbol,
5076 because this might be a case of linking PIC code without
5077 linking in any dynamic objects, in which case we don't
5078 need to generate a procedure linkage table after all. */
5079 if (h == NULL)
5080 {
5081 /* It does not make sense to have a procedure linkage
5082 table entry for a local symbol. */
5083 bfd_set_error (bfd_error_bad_value);
5084 return FALSE;
5085 }
5086 else
5087 {
5088 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5089 return FALSE;
5090 h->needs_plt = 1;
5091 if (h->root.root.string[0] == '.'
5092 && h->root.root.string[1] != '\0')
5093 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5094 }
5095 break;
5096
5097 /* The following relocations don't need to propagate the
5098 relocation if linking a shared object since they are
5099 section relative. */
5100 case R_PPC64_SECTOFF:
5101 case R_PPC64_SECTOFF_LO:
5102 case R_PPC64_SECTOFF_HI:
5103 case R_PPC64_SECTOFF_HA:
5104 case R_PPC64_SECTOFF_DS:
5105 case R_PPC64_SECTOFF_LO_DS:
5106 case R_PPC64_DTPREL16:
5107 case R_PPC64_DTPREL16_LO:
5108 case R_PPC64_DTPREL16_HI:
5109 case R_PPC64_DTPREL16_HA:
5110 case R_PPC64_DTPREL16_DS:
5111 case R_PPC64_DTPREL16_LO_DS:
5112 case R_PPC64_DTPREL16_HIGHER:
5113 case R_PPC64_DTPREL16_HIGHERA:
5114 case R_PPC64_DTPREL16_HIGHEST:
5115 case R_PPC64_DTPREL16_HIGHESTA:
5116 break;
5117
5118 /* Nor do these. */
5119 case R_PPC64_REL16:
5120 case R_PPC64_REL16_LO:
5121 case R_PPC64_REL16_HI:
5122 case R_PPC64_REL16_HA:
5123 break;
5124
5125 case R_PPC64_TOC16:
5126 case R_PPC64_TOC16_DS:
5127 htab->do_multi_toc = 1;
5128 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5129 case R_PPC64_TOC16_LO:
5130 case R_PPC64_TOC16_HI:
5131 case R_PPC64_TOC16_HA:
5132 case R_PPC64_TOC16_LO_DS:
5133 sec->has_toc_reloc = 1;
5134 break;
5135
5136 /* This relocation describes the C++ object vtable hierarchy.
5137 Reconstruct it for later use during GC. */
5138 case R_PPC64_GNU_VTINHERIT:
5139 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5140 return FALSE;
5141 break;
5142
5143 /* This relocation describes which C++ vtable entries are actually
5144 used. Record for later use during GC. */
5145 case R_PPC64_GNU_VTENTRY:
5146 BFD_ASSERT (h != NULL);
5147 if (h != NULL
5148 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5149 return FALSE;
5150 break;
5151
5152 case R_PPC64_REL14:
5153 case R_PPC64_REL14_BRTAKEN:
5154 case R_PPC64_REL14_BRNTAKEN:
5155 {
5156 asection *dest = NULL;
5157
5158 /* Heuristic: If jumping outside our section, chances are
5159 we are going to need a stub. */
5160 if (h != NULL)
5161 {
5162 /* If the sym is weak it may be overridden later, so
5163 don't assume we know where a weak sym lives. */
5164 if (h->root.type == bfd_link_hash_defined)
5165 dest = h->root.u.def.section;
5166 }
5167 else
5168 {
5169 Elf_Internal_Sym *isym;
5170
5171 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5172 abfd, r_symndx);
5173 if (isym == NULL)
5174 return FALSE;
5175
5176 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5177 }
5178
5179 if (dest != sec)
5180 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5181 }
5182 /* Fall through. */
5183
5184 case R_PPC64_REL24:
5185 if (h != NULL && ifunc == NULL)
5186 {
5187 /* We may need a .plt entry if the function this reloc
5188 refers to is in a shared lib. */
5189 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5190 return FALSE;
5191 h->needs_plt = 1;
5192 if (h->root.root.string[0] == '.'
5193 && h->root.root.string[1] != '\0')
5194 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5195 if (h == tga || h == dottga)
5196 sec->has_tls_reloc = 1;
5197 }
5198 break;
5199
5200 case R_PPC64_TPREL64:
5201 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5202 if (!info->executable)
5203 info->flags |= DF_STATIC_TLS;
5204 goto dotlstoc;
5205
5206 case R_PPC64_DTPMOD64:
5207 if (rel + 1 < rel_end
5208 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5209 && rel[1].r_offset == rel->r_offset + 8)
5210 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5211 else
5212 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5213 goto dotlstoc;
5214
5215 case R_PPC64_DTPREL64:
5216 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5217 if (rel != relocs
5218 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5219 && rel[-1].r_offset == rel->r_offset - 8)
5220 /* This is the second reloc of a dtpmod, dtprel pair.
5221 Don't mark with TLS_DTPREL. */
5222 goto dodyn;
5223
5224 dotlstoc:
5225 sec->has_tls_reloc = 1;
5226 if (h != NULL)
5227 {
5228 struct ppc_link_hash_entry *eh;
5229 eh = (struct ppc_link_hash_entry *) h;
5230 eh->tls_mask |= tls_type;
5231 }
5232 else
5233 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5234 rel->r_addend, tls_type))
5235 return FALSE;
5236
5237 ppc64_sec = ppc64_elf_section_data (sec);
5238 if (ppc64_sec->sec_type != sec_toc)
5239 {
5240 bfd_size_type amt;
5241
5242 /* One extra to simplify get_tls_mask. */
5243 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5244 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5245 if (ppc64_sec->u.toc.symndx == NULL)
5246 return FALSE;
5247 amt = sec->size * sizeof (bfd_vma) / 8;
5248 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5249 if (ppc64_sec->u.toc.add == NULL)
5250 return FALSE;
5251 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5252 ppc64_sec->sec_type = sec_toc;
5253 }
5254 BFD_ASSERT (rel->r_offset % 8 == 0);
5255 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5256 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5257
5258 /* Mark the second slot of a GD or LD entry.
5259 -1 to indicate GD and -2 to indicate LD. */
5260 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5261 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5262 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5263 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5264 goto dodyn;
5265
5266 case R_PPC64_TPREL16:
5267 case R_PPC64_TPREL16_LO:
5268 case R_PPC64_TPREL16_HI:
5269 case R_PPC64_TPREL16_HA:
5270 case R_PPC64_TPREL16_DS:
5271 case R_PPC64_TPREL16_LO_DS:
5272 case R_PPC64_TPREL16_HIGHER:
5273 case R_PPC64_TPREL16_HIGHERA:
5274 case R_PPC64_TPREL16_HIGHEST:
5275 case R_PPC64_TPREL16_HIGHESTA:
5276 if (info->shared)
5277 {
5278 if (!info->executable)
5279 info->flags |= DF_STATIC_TLS;
5280 goto dodyn;
5281 }
5282 break;
5283
5284 case R_PPC64_ADDR64:
5285 if (opd_sym_map != NULL
5286 && rel + 1 < rel_end
5287 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5288 {
5289 if (h != NULL)
5290 {
5291 if (h->root.root.string[0] == '.'
5292 && h->root.root.string[1] != 0
5293 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5294 ;
5295 else
5296 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5297 }
5298 else
5299 {
5300 asection *s;
5301 Elf_Internal_Sym *isym;
5302
5303 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5304 abfd, r_symndx);
5305 if (isym == NULL)
5306 return FALSE;
5307
5308 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5309 if (s != NULL && s != sec)
5310 opd_sym_map[rel->r_offset / 8] = s;
5311 }
5312 }
5313 /* Fall through. */
5314
5315 case R_PPC64_REL30:
5316 case R_PPC64_REL32:
5317 case R_PPC64_REL64:
5318 case R_PPC64_ADDR14:
5319 case R_PPC64_ADDR14_BRNTAKEN:
5320 case R_PPC64_ADDR14_BRTAKEN:
5321 case R_PPC64_ADDR16:
5322 case R_PPC64_ADDR16_DS:
5323 case R_PPC64_ADDR16_HA:
5324 case R_PPC64_ADDR16_HI:
5325 case R_PPC64_ADDR16_HIGHER:
5326 case R_PPC64_ADDR16_HIGHERA:
5327 case R_PPC64_ADDR16_HIGHEST:
5328 case R_PPC64_ADDR16_HIGHESTA:
5329 case R_PPC64_ADDR16_LO:
5330 case R_PPC64_ADDR16_LO_DS:
5331 case R_PPC64_ADDR24:
5332 case R_PPC64_ADDR32:
5333 case R_PPC64_UADDR16:
5334 case R_PPC64_UADDR32:
5335 case R_PPC64_UADDR64:
5336 case R_PPC64_TOC:
5337 if (h != NULL && !info->shared)
5338 /* We may need a copy reloc. */
5339 h->non_got_ref = 1;
5340
5341 /* Don't propagate .opd relocs. */
5342 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5343 break;
5344
5345 /* If we are creating a shared library, and this is a reloc
5346 against a global symbol, or a non PC relative reloc
5347 against a local symbol, then we need to copy the reloc
5348 into the shared library. However, if we are linking with
5349 -Bsymbolic, we do not need to copy a reloc against a
5350 global symbol which is defined in an object we are
5351 including in the link (i.e., DEF_REGULAR is set). At
5352 this point we have not seen all the input files, so it is
5353 possible that DEF_REGULAR is not set now but will be set
5354 later (it is never cleared). In case of a weak definition,
5355 DEF_REGULAR may be cleared later by a strong definition in
5356 a shared library. We account for that possibility below by
5357 storing information in the dyn_relocs field of the hash
5358 table entry. A similar situation occurs when creating
5359 shared libraries and symbol visibility changes render the
5360 symbol local.
5361
5362 If on the other hand, we are creating an executable, we
5363 may need to keep relocations for symbols satisfied by a
5364 dynamic library if we manage to avoid copy relocs for the
5365 symbol. */
5366 dodyn:
5367 if ((info->shared
5368 && (must_be_dyn_reloc (info, r_type)
5369 || (h != NULL
5370 && (! info->symbolic
5371 || h->root.type == bfd_link_hash_defweak
5372 || !h->def_regular))))
5373 || (ELIMINATE_COPY_RELOCS
5374 && !info->shared
5375 && h != NULL
5376 && (h->root.type == bfd_link_hash_defweak
5377 || !h->def_regular))
5378 || (!info->shared
5379 && ifunc != NULL))
5380 {
5381 struct ppc_dyn_relocs *p;
5382 struct ppc_dyn_relocs **head;
5383
5384 /* We must copy these reloc types into the output file.
5385 Create a reloc section in dynobj and make room for
5386 this reloc. */
5387 if (sreloc == NULL)
5388 {
5389 sreloc = _bfd_elf_make_dynamic_reloc_section
5390 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5391
5392 if (sreloc == NULL)
5393 return FALSE;
5394 }
5395
5396 /* If this is a global symbol, we count the number of
5397 relocations we need for this symbol. */
5398 if (h != NULL)
5399 {
5400 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5401 }
5402 else
5403 {
5404 /* Track dynamic relocs needed for local syms too.
5405 We really need local syms available to do this
5406 easily. Oh well. */
5407 asection *s;
5408 void *vpp;
5409 Elf_Internal_Sym *isym;
5410
5411 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5412 abfd, r_symndx);
5413 if (isym == NULL)
5414 return FALSE;
5415
5416 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5417 if (s == NULL)
5418 s = sec;
5419
5420 vpp = &elf_section_data (s)->local_dynrel;
5421 head = (struct ppc_dyn_relocs **) vpp;
5422 }
5423
5424 p = *head;
5425 if (p == NULL || p->sec != sec)
5426 {
5427 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5428 if (p == NULL)
5429 return FALSE;
5430 p->next = *head;
5431 *head = p;
5432 p->sec = sec;
5433 p->count = 0;
5434 p->pc_count = 0;
5435 }
5436
5437 p->count += 1;
5438 if (!must_be_dyn_reloc (info, r_type))
5439 p->pc_count += 1;
5440 }
5441 break;
5442
5443 default:
5444 break;
5445 }
5446 }
5447
5448 return TRUE;
5449 }
5450
5451 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5452 of the code entry point, and its section. */
5453
5454 static bfd_vma
5455 opd_entry_value (asection *opd_sec,
5456 bfd_vma offset,
5457 asection **code_sec,
5458 bfd_vma *code_off)
5459 {
5460 bfd *opd_bfd = opd_sec->owner;
5461 Elf_Internal_Rela *relocs;
5462 Elf_Internal_Rela *lo, *hi, *look;
5463 bfd_vma val;
5464
5465 /* No relocs implies we are linking a --just-symbols object. */
5466 if (opd_sec->reloc_count == 0)
5467 {
5468 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5469 return (bfd_vma) -1;
5470
5471 if (code_sec != NULL)
5472 {
5473 asection *sec, *likely = NULL;
5474 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5475 if (sec->vma <= val
5476 && (sec->flags & SEC_LOAD) != 0
5477 && (sec->flags & SEC_ALLOC) != 0)
5478 likely = sec;
5479 if (likely != NULL)
5480 {
5481 *code_sec = likely;
5482 if (code_off != NULL)
5483 *code_off = val - likely->vma;
5484 }
5485 }
5486 return val;
5487 }
5488
5489 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5490
5491 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5492 if (relocs == NULL)
5493 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5494
5495 /* Go find the opd reloc at the sym address. */
5496 lo = relocs;
5497 BFD_ASSERT (lo != NULL);
5498 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5499 val = (bfd_vma) -1;
5500 while (lo < hi)
5501 {
5502 look = lo + (hi - lo) / 2;
5503 if (look->r_offset < offset)
5504 lo = look + 1;
5505 else if (look->r_offset > offset)
5506 hi = look;
5507 else
5508 {
5509 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5510
5511 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5512 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5513 {
5514 unsigned long symndx = ELF64_R_SYM (look->r_info);
5515 asection *sec;
5516
5517 if (symndx < symtab_hdr->sh_info)
5518 {
5519 Elf_Internal_Sym *sym;
5520
5521 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5522 if (sym == NULL)
5523 {
5524 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5525 symtab_hdr->sh_info,
5526 0, NULL, NULL, NULL);
5527 if (sym == NULL)
5528 break;
5529 symtab_hdr->contents = (bfd_byte *) sym;
5530 }
5531
5532 sym += symndx;
5533 val = sym->st_value;
5534 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5535 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5536 }
5537 else
5538 {
5539 struct elf_link_hash_entry **sym_hashes;
5540 struct elf_link_hash_entry *rh;
5541
5542 sym_hashes = elf_sym_hashes (opd_bfd);
5543 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5544 rh = elf_follow_link (rh);
5545 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5546 || rh->root.type == bfd_link_hash_defweak);
5547 val = rh->root.u.def.value;
5548 sec = rh->root.u.def.section;
5549 }
5550 val += look->r_addend;
5551 if (code_off != NULL)
5552 *code_off = val;
5553 if (code_sec != NULL)
5554 *code_sec = sec;
5555 if (sec != NULL && sec->output_section != NULL)
5556 val += sec->output_section->vma + sec->output_offset;
5557 }
5558 break;
5559 }
5560 }
5561
5562 return val;
5563 }
5564
5565 /* Return true if symbol is defined in a regular object file. */
5566
5567 static bfd_boolean
5568 is_static_defined (struct elf_link_hash_entry *h)
5569 {
5570 return ((h->root.type == bfd_link_hash_defined
5571 || h->root.type == bfd_link_hash_defweak)
5572 && h->root.u.def.section != NULL
5573 && h->root.u.def.section->output_section != NULL);
5574 }
5575
5576 /* If FDH is a function descriptor symbol, return the associated code
5577 entry symbol if it is defined. Return NULL otherwise. */
5578
5579 static struct ppc_link_hash_entry *
5580 defined_code_entry (struct ppc_link_hash_entry *fdh)
5581 {
5582 if (fdh->is_func_descriptor)
5583 {
5584 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5585 if (fh->elf.root.type == bfd_link_hash_defined
5586 || fh->elf.root.type == bfd_link_hash_defweak)
5587 return fh;
5588 }
5589 return NULL;
5590 }
5591
5592 /* If FH is a function code entry symbol, return the associated
5593 function descriptor symbol if it is defined. Return NULL otherwise. */
5594
5595 static struct ppc_link_hash_entry *
5596 defined_func_desc (struct ppc_link_hash_entry *fh)
5597 {
5598 if (fh->oh != NULL
5599 && fh->oh->is_func_descriptor)
5600 {
5601 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5602 if (fdh->elf.root.type == bfd_link_hash_defined
5603 || fdh->elf.root.type == bfd_link_hash_defweak)
5604 return fdh;
5605 }
5606 return NULL;
5607 }
5608
5609 /* Mark all our entry sym sections, both opd and code section. */
5610
5611 static void
5612 ppc64_elf_gc_keep (struct bfd_link_info *info)
5613 {
5614 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5615 struct bfd_sym_chain *sym;
5616
5617 if (htab == NULL)
5618 return;
5619
5620 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5621 {
5622 struct ppc_link_hash_entry *eh, *fh;
5623 asection *sec;
5624
5625 eh = (struct ppc_link_hash_entry *)
5626 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5627 if (eh == NULL)
5628 continue;
5629 if (eh->elf.root.type != bfd_link_hash_defined
5630 && eh->elf.root.type != bfd_link_hash_defweak)
5631 continue;
5632
5633 fh = defined_code_entry (eh);
5634 if (fh != NULL)
5635 {
5636 sec = fh->elf.root.u.def.section;
5637 sec->flags |= SEC_KEEP;
5638 }
5639 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5640 && opd_entry_value (eh->elf.root.u.def.section,
5641 eh->elf.root.u.def.value,
5642 &sec, NULL) != (bfd_vma) -1)
5643 sec->flags |= SEC_KEEP;
5644
5645 sec = eh->elf.root.u.def.section;
5646 sec->flags |= SEC_KEEP;
5647 }
5648 }
5649
5650 /* Mark sections containing dynamically referenced symbols. When
5651 building shared libraries, we must assume that any visible symbol is
5652 referenced. */
5653
5654 static bfd_boolean
5655 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5656 {
5657 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5658 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5659 struct ppc_link_hash_entry *fdh;
5660
5661 if (eh->elf.root.type == bfd_link_hash_warning)
5662 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5663
5664 /* Dynamic linking info is on the func descriptor sym. */
5665 fdh = defined_func_desc (eh);
5666 if (fdh != NULL)
5667 eh = fdh;
5668
5669 if ((eh->elf.root.type == bfd_link_hash_defined
5670 || eh->elf.root.type == bfd_link_hash_defweak)
5671 && (eh->elf.ref_dynamic
5672 || (!info->executable
5673 && eh->elf.def_regular
5674 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5675 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5676 {
5677 asection *code_sec;
5678 struct ppc_link_hash_entry *fh;
5679
5680 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5681
5682 /* Function descriptor syms cause the associated
5683 function code sym section to be marked. */
5684 fh = defined_code_entry (eh);
5685 if (fh != NULL)
5686 {
5687 code_sec = fh->elf.root.u.def.section;
5688 code_sec->flags |= SEC_KEEP;
5689 }
5690 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5691 && opd_entry_value (eh->elf.root.u.def.section,
5692 eh->elf.root.u.def.value,
5693 &code_sec, NULL) != (bfd_vma) -1)
5694 code_sec->flags |= SEC_KEEP;
5695 }
5696
5697 return TRUE;
5698 }
5699
5700 /* Return the section that should be marked against GC for a given
5701 relocation. */
5702
5703 static asection *
5704 ppc64_elf_gc_mark_hook (asection *sec,
5705 struct bfd_link_info *info,
5706 Elf_Internal_Rela *rel,
5707 struct elf_link_hash_entry *h,
5708 Elf_Internal_Sym *sym)
5709 {
5710 asection *rsec;
5711
5712 /* Syms return NULL if we're marking .opd, so we avoid marking all
5713 function sections, as all functions are referenced in .opd. */
5714 rsec = NULL;
5715 if (get_opd_info (sec) != NULL)
5716 return rsec;
5717
5718 if (h != NULL)
5719 {
5720 enum elf_ppc64_reloc_type r_type;
5721 struct ppc_link_hash_entry *eh, *fh, *fdh;
5722
5723 r_type = ELF64_R_TYPE (rel->r_info);
5724 switch (r_type)
5725 {
5726 case R_PPC64_GNU_VTINHERIT:
5727 case R_PPC64_GNU_VTENTRY:
5728 break;
5729
5730 default:
5731 switch (h->root.type)
5732 {
5733 case bfd_link_hash_defined:
5734 case bfd_link_hash_defweak:
5735 eh = (struct ppc_link_hash_entry *) h;
5736 fdh = defined_func_desc (eh);
5737 if (fdh != NULL)
5738 eh = fdh;
5739
5740 /* Function descriptor syms cause the associated
5741 function code sym section to be marked. */
5742 fh = defined_code_entry (eh);
5743 if (fh != NULL)
5744 {
5745 /* They also mark their opd section. */
5746 eh->elf.root.u.def.section->gc_mark = 1;
5747
5748 rsec = fh->elf.root.u.def.section;
5749 }
5750 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5751 && opd_entry_value (eh->elf.root.u.def.section,
5752 eh->elf.root.u.def.value,
5753 &rsec, NULL) != (bfd_vma) -1)
5754 eh->elf.root.u.def.section->gc_mark = 1;
5755 else
5756 rsec = h->root.u.def.section;
5757 break;
5758
5759 case bfd_link_hash_common:
5760 rsec = h->root.u.c.p->section;
5761 break;
5762
5763 default:
5764 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5765 }
5766 }
5767 }
5768 else
5769 {
5770 struct _opd_sec_data *opd;
5771
5772 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5773 opd = get_opd_info (rsec);
5774 if (opd != NULL && opd->func_sec != NULL)
5775 {
5776 rsec->gc_mark = 1;
5777
5778 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5779 }
5780 }
5781
5782 return rsec;
5783 }
5784
5785 /* Update the .got, .plt. and dynamic reloc reference counts for the
5786 section being removed. */
5787
5788 static bfd_boolean
5789 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5790 asection *sec, const Elf_Internal_Rela *relocs)
5791 {
5792 struct ppc_link_hash_table *htab;
5793 Elf_Internal_Shdr *symtab_hdr;
5794 struct elf_link_hash_entry **sym_hashes;
5795 struct got_entry **local_got_ents;
5796 const Elf_Internal_Rela *rel, *relend;
5797
5798 if (info->relocatable)
5799 return TRUE;
5800
5801 if ((sec->flags & SEC_ALLOC) == 0)
5802 return TRUE;
5803
5804 elf_section_data (sec)->local_dynrel = NULL;
5805
5806 htab = ppc_hash_table (info);
5807 if (htab == NULL)
5808 return FALSE;
5809
5810 symtab_hdr = &elf_symtab_hdr (abfd);
5811 sym_hashes = elf_sym_hashes (abfd);
5812 local_got_ents = elf_local_got_ents (abfd);
5813
5814 relend = relocs + sec->reloc_count;
5815 for (rel = relocs; rel < relend; rel++)
5816 {
5817 unsigned long r_symndx;
5818 enum elf_ppc64_reloc_type r_type;
5819 struct elf_link_hash_entry *h = NULL;
5820 unsigned char tls_type = 0;
5821
5822 r_symndx = ELF64_R_SYM (rel->r_info);
5823 r_type = ELF64_R_TYPE (rel->r_info);
5824 if (r_symndx >= symtab_hdr->sh_info)
5825 {
5826 struct ppc_link_hash_entry *eh;
5827 struct ppc_dyn_relocs **pp;
5828 struct ppc_dyn_relocs *p;
5829
5830 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5831 h = elf_follow_link (h);
5832 eh = (struct ppc_link_hash_entry *) h;
5833
5834 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5835 if (p->sec == sec)
5836 {
5837 /* Everything must go for SEC. */
5838 *pp = p->next;
5839 break;
5840 }
5841 }
5842
5843 if (is_branch_reloc (r_type))
5844 {
5845 struct plt_entry **ifunc = NULL;
5846 if (h != NULL)
5847 {
5848 if (h->type == STT_GNU_IFUNC)
5849 ifunc = &h->plt.plist;
5850 }
5851 else if (local_got_ents != NULL)
5852 {
5853 struct plt_entry **local_plt = (struct plt_entry **)
5854 (local_got_ents + symtab_hdr->sh_info);
5855 unsigned char *local_got_tls_masks = (unsigned char *)
5856 (local_plt + symtab_hdr->sh_info);
5857 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5858 ifunc = local_plt + r_symndx;
5859 }
5860 if (ifunc != NULL)
5861 {
5862 struct plt_entry *ent;
5863
5864 for (ent = *ifunc; ent != NULL; ent = ent->next)
5865 if (ent->addend == rel->r_addend)
5866 break;
5867 if (ent == NULL)
5868 abort ();
5869 if (ent->plt.refcount > 0)
5870 ent->plt.refcount -= 1;
5871 continue;
5872 }
5873 }
5874
5875 switch (r_type)
5876 {
5877 case R_PPC64_GOT_TLSLD16:
5878 case R_PPC64_GOT_TLSLD16_LO:
5879 case R_PPC64_GOT_TLSLD16_HI:
5880 case R_PPC64_GOT_TLSLD16_HA:
5881 tls_type = TLS_TLS | TLS_LD;
5882 goto dogot;
5883
5884 case R_PPC64_GOT_TLSGD16:
5885 case R_PPC64_GOT_TLSGD16_LO:
5886 case R_PPC64_GOT_TLSGD16_HI:
5887 case R_PPC64_GOT_TLSGD16_HA:
5888 tls_type = TLS_TLS | TLS_GD;
5889 goto dogot;
5890
5891 case R_PPC64_GOT_TPREL16_DS:
5892 case R_PPC64_GOT_TPREL16_LO_DS:
5893 case R_PPC64_GOT_TPREL16_HI:
5894 case R_PPC64_GOT_TPREL16_HA:
5895 tls_type = TLS_TLS | TLS_TPREL;
5896 goto dogot;
5897
5898 case R_PPC64_GOT_DTPREL16_DS:
5899 case R_PPC64_GOT_DTPREL16_LO_DS:
5900 case R_PPC64_GOT_DTPREL16_HI:
5901 case R_PPC64_GOT_DTPREL16_HA:
5902 tls_type = TLS_TLS | TLS_DTPREL;
5903 goto dogot;
5904
5905 case R_PPC64_GOT16:
5906 case R_PPC64_GOT16_DS:
5907 case R_PPC64_GOT16_HA:
5908 case R_PPC64_GOT16_HI:
5909 case R_PPC64_GOT16_LO:
5910 case R_PPC64_GOT16_LO_DS:
5911 dogot:
5912 {
5913 struct got_entry *ent;
5914
5915 if (h != NULL)
5916 ent = h->got.glist;
5917 else
5918 ent = local_got_ents[r_symndx];
5919
5920 for (; ent != NULL; ent = ent->next)
5921 if (ent->addend == rel->r_addend
5922 && ent->owner == abfd
5923 && ent->tls_type == tls_type)
5924 break;
5925 if (ent == NULL)
5926 abort ();
5927 if (ent->got.refcount > 0)
5928 ent->got.refcount -= 1;
5929 }
5930 break;
5931
5932 case R_PPC64_PLT16_HA:
5933 case R_PPC64_PLT16_HI:
5934 case R_PPC64_PLT16_LO:
5935 case R_PPC64_PLT32:
5936 case R_PPC64_PLT64:
5937 case R_PPC64_REL14:
5938 case R_PPC64_REL14_BRNTAKEN:
5939 case R_PPC64_REL14_BRTAKEN:
5940 case R_PPC64_REL24:
5941 if (h != NULL)
5942 {
5943 struct plt_entry *ent;
5944
5945 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5946 if (ent->addend == rel->r_addend)
5947 break;
5948 if (ent != NULL && ent->plt.refcount > 0)
5949 ent->plt.refcount -= 1;
5950 }
5951 break;
5952
5953 default:
5954 break;
5955 }
5956 }
5957 return TRUE;
5958 }
5959
5960 /* The maximum size of .sfpr. */
5961 #define SFPR_MAX (218*4)
5962
5963 struct sfpr_def_parms
5964 {
5965 const char name[12];
5966 unsigned char lo, hi;
5967 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5968 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5969 };
5970
5971 /* Auto-generate _save*, _rest* functions in .sfpr. */
5972
5973 static bfd_boolean
5974 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5975 {
5976 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5977 unsigned int i;
5978 size_t len = strlen (parm->name);
5979 bfd_boolean writing = FALSE;
5980 char sym[16];
5981
5982 if (htab == NULL)
5983 return FALSE;
5984
5985 memcpy (sym, parm->name, len);
5986 sym[len + 2] = 0;
5987
5988 for (i = parm->lo; i <= parm->hi; i++)
5989 {
5990 struct elf_link_hash_entry *h;
5991
5992 sym[len + 0] = i / 10 + '0';
5993 sym[len + 1] = i % 10 + '0';
5994 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5995 if (h != NULL
5996 && !h->def_regular)
5997 {
5998 h->root.type = bfd_link_hash_defined;
5999 h->root.u.def.section = htab->sfpr;
6000 h->root.u.def.value = htab->sfpr->size;
6001 h->type = STT_FUNC;
6002 h->def_regular = 1;
6003 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6004 writing = TRUE;
6005 if (htab->sfpr->contents == NULL)
6006 {
6007 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6008 if (htab->sfpr->contents == NULL)
6009 return FALSE;
6010 }
6011 }
6012 if (writing)
6013 {
6014 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6015 if (i != parm->hi)
6016 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6017 else
6018 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6019 htab->sfpr->size = p - htab->sfpr->contents;
6020 }
6021 }
6022
6023 return TRUE;
6024 }
6025
6026 static bfd_byte *
6027 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6028 {
6029 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6030 return p + 4;
6031 }
6032
6033 static bfd_byte *
6034 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6035 {
6036 p = savegpr0 (abfd, p, r);
6037 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6038 p = p + 4;
6039 bfd_put_32 (abfd, BLR, p);
6040 return p + 4;
6041 }
6042
6043 static bfd_byte *
6044 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6045 {
6046 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6047 return p + 4;
6048 }
6049
6050 static bfd_byte *
6051 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6052 {
6053 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6054 p = p + 4;
6055 p = restgpr0 (abfd, p, r);
6056 bfd_put_32 (abfd, MTLR_R0, p);
6057 p = p + 4;
6058 if (r == 29)
6059 {
6060 p = restgpr0 (abfd, p, 30);
6061 p = restgpr0 (abfd, p, 31);
6062 }
6063 bfd_put_32 (abfd, BLR, p);
6064 return p + 4;
6065 }
6066
6067 static bfd_byte *
6068 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6069 {
6070 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6071 return p + 4;
6072 }
6073
6074 static bfd_byte *
6075 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6076 {
6077 p = savegpr1 (abfd, p, r);
6078 bfd_put_32 (abfd, BLR, p);
6079 return p + 4;
6080 }
6081
6082 static bfd_byte *
6083 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6084 {
6085 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6086 return p + 4;
6087 }
6088
6089 static bfd_byte *
6090 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6091 {
6092 p = restgpr1 (abfd, p, r);
6093 bfd_put_32 (abfd, BLR, p);
6094 return p + 4;
6095 }
6096
6097 static bfd_byte *
6098 savefpr (bfd *abfd, bfd_byte *p, int r)
6099 {
6100 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6101 return p + 4;
6102 }
6103
6104 static bfd_byte *
6105 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6106 {
6107 p = savefpr (abfd, p, r);
6108 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6109 p = p + 4;
6110 bfd_put_32 (abfd, BLR, p);
6111 return p + 4;
6112 }
6113
6114 static bfd_byte *
6115 restfpr (bfd *abfd, bfd_byte *p, int r)
6116 {
6117 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6118 return p + 4;
6119 }
6120
6121 static bfd_byte *
6122 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6123 {
6124 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6125 p = p + 4;
6126 p = restfpr (abfd, p, r);
6127 bfd_put_32 (abfd, MTLR_R0, p);
6128 p = p + 4;
6129 if (r == 29)
6130 {
6131 p = restfpr (abfd, p, 30);
6132 p = restfpr (abfd, p, 31);
6133 }
6134 bfd_put_32 (abfd, BLR, p);
6135 return p + 4;
6136 }
6137
6138 static bfd_byte *
6139 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6140 {
6141 p = savefpr (abfd, p, r);
6142 bfd_put_32 (abfd, BLR, p);
6143 return p + 4;
6144 }
6145
6146 static bfd_byte *
6147 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6148 {
6149 p = restfpr (abfd, p, r);
6150 bfd_put_32 (abfd, BLR, p);
6151 return p + 4;
6152 }
6153
6154 static bfd_byte *
6155 savevr (bfd *abfd, bfd_byte *p, int r)
6156 {
6157 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6158 p = p + 4;
6159 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6160 return p + 4;
6161 }
6162
6163 static bfd_byte *
6164 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6165 {
6166 p = savevr (abfd, p, r);
6167 bfd_put_32 (abfd, BLR, p);
6168 return p + 4;
6169 }
6170
6171 static bfd_byte *
6172 restvr (bfd *abfd, bfd_byte *p, int r)
6173 {
6174 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6175 p = p + 4;
6176 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6177 return p + 4;
6178 }
6179
6180 static bfd_byte *
6181 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6182 {
6183 p = restvr (abfd, p, r);
6184 bfd_put_32 (abfd, BLR, p);
6185 return p + 4;
6186 }
6187
6188 /* Called via elf_link_hash_traverse to transfer dynamic linking
6189 information on function code symbol entries to their corresponding
6190 function descriptor symbol entries. */
6191
6192 static bfd_boolean
6193 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6194 {
6195 struct bfd_link_info *info;
6196 struct ppc_link_hash_table *htab;
6197 struct plt_entry *ent;
6198 struct ppc_link_hash_entry *fh;
6199 struct ppc_link_hash_entry *fdh;
6200 bfd_boolean force_local;
6201
6202 fh = (struct ppc_link_hash_entry *) h;
6203 if (fh->elf.root.type == bfd_link_hash_indirect)
6204 return TRUE;
6205
6206 if (fh->elf.root.type == bfd_link_hash_warning)
6207 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6208
6209 info = inf;
6210 htab = ppc_hash_table (info);
6211 if (htab == NULL)
6212 return FALSE;
6213
6214 /* Resolve undefined references to dot-symbols as the value
6215 in the function descriptor, if we have one in a regular object.
6216 This is to satisfy cases like ".quad .foo". Calls to functions
6217 in dynamic objects are handled elsewhere. */
6218 if (fh->elf.root.type == bfd_link_hash_undefweak
6219 && fh->was_undefined
6220 && (fdh = defined_func_desc (fh)) != NULL
6221 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6222 && opd_entry_value (fdh->elf.root.u.def.section,
6223 fdh->elf.root.u.def.value,
6224 &fh->elf.root.u.def.section,
6225 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6226 {
6227 fh->elf.root.type = fdh->elf.root.type;
6228 fh->elf.forced_local = 1;
6229 fh->elf.def_regular = fdh->elf.def_regular;
6230 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6231 }
6232
6233 /* If this is a function code symbol, transfer dynamic linking
6234 information to the function descriptor symbol. */
6235 if (!fh->is_func)
6236 return TRUE;
6237
6238 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6239 if (ent->plt.refcount > 0)
6240 break;
6241 if (ent == NULL
6242 || fh->elf.root.root.string[0] != '.'
6243 || fh->elf.root.root.string[1] == '\0')
6244 return TRUE;
6245
6246 /* Find the corresponding function descriptor symbol. Create it
6247 as undefined if necessary. */
6248
6249 fdh = lookup_fdh (fh, htab);
6250 if (fdh == NULL
6251 && !info->executable
6252 && (fh->elf.root.type == bfd_link_hash_undefined
6253 || fh->elf.root.type == bfd_link_hash_undefweak))
6254 {
6255 fdh = make_fdh (info, fh);
6256 if (fdh == NULL)
6257 return FALSE;
6258 }
6259
6260 /* Fake function descriptors are made undefweak. If the function
6261 code symbol is strong undefined, make the fake sym the same.
6262 If the function code symbol is defined, then force the fake
6263 descriptor local; We can't support overriding of symbols in a
6264 shared library on a fake descriptor. */
6265
6266 if (fdh != NULL
6267 && fdh->fake
6268 && fdh->elf.root.type == bfd_link_hash_undefweak)
6269 {
6270 if (fh->elf.root.type == bfd_link_hash_undefined)
6271 {
6272 fdh->elf.root.type = bfd_link_hash_undefined;
6273 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6274 }
6275 else if (fh->elf.root.type == bfd_link_hash_defined
6276 || fh->elf.root.type == bfd_link_hash_defweak)
6277 {
6278 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6279 }
6280 }
6281
6282 if (fdh != NULL
6283 && !fdh->elf.forced_local
6284 && (!info->executable
6285 || fdh->elf.def_dynamic
6286 || fdh->elf.ref_dynamic
6287 || (fdh->elf.root.type == bfd_link_hash_undefweak
6288 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6289 {
6290 if (fdh->elf.dynindx == -1)
6291 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6292 return FALSE;
6293 fdh->elf.ref_regular |= fh->elf.ref_regular;
6294 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6295 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6296 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6297 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6298 {
6299 move_plt_plist (fh, fdh);
6300 fdh->elf.needs_plt = 1;
6301 }
6302 fdh->is_func_descriptor = 1;
6303 fdh->oh = fh;
6304 fh->oh = fdh;
6305 }
6306
6307 /* Now that the info is on the function descriptor, clear the
6308 function code sym info. Any function code syms for which we
6309 don't have a definition in a regular file, we force local.
6310 This prevents a shared library from exporting syms that have
6311 been imported from another library. Function code syms that
6312 are really in the library we must leave global to prevent the
6313 linker dragging in a definition from a static library. */
6314 force_local = (!fh->elf.def_regular
6315 || fdh == NULL
6316 || !fdh->elf.def_regular
6317 || fdh->elf.forced_local);
6318 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6319
6320 return TRUE;
6321 }
6322
6323 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6324 this hook to a) provide some gcc support functions, and b) transfer
6325 dynamic linking information gathered so far on function code symbol
6326 entries, to their corresponding function descriptor symbol entries. */
6327
6328 static bfd_boolean
6329 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6330 struct bfd_link_info *info)
6331 {
6332 struct ppc_link_hash_table *htab;
6333 unsigned int i;
6334 const struct sfpr_def_parms funcs[] =
6335 {
6336 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6337 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6338 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6339 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6340 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6341 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6342 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6343 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6344 { "._savef", 14, 31, savefpr, savefpr1_tail },
6345 { "._restf", 14, 31, restfpr, restfpr1_tail },
6346 { "_savevr_", 20, 31, savevr, savevr_tail },
6347 { "_restvr_", 20, 31, restvr, restvr_tail }
6348 };
6349
6350 htab = ppc_hash_table (info);
6351 if (htab == NULL)
6352 return FALSE;
6353
6354 if (htab->sfpr == NULL)
6355 /* We don't have any relocs. */
6356 return TRUE;
6357
6358 /* Provide any missing _save* and _rest* functions. */
6359 htab->sfpr->size = 0;
6360 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6361 if (!sfpr_define (info, &funcs[i]))
6362 return FALSE;
6363
6364 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6365
6366 if (htab->sfpr->size == 0)
6367 htab->sfpr->flags |= SEC_EXCLUDE;
6368
6369 return TRUE;
6370 }
6371
6372 /* Adjust a symbol defined by a dynamic object and referenced by a
6373 regular object. The current definition is in some section of the
6374 dynamic object, but we're not including those sections. We have to
6375 change the definition to something the rest of the link can
6376 understand. */
6377
6378 static bfd_boolean
6379 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6380 struct elf_link_hash_entry *h)
6381 {
6382 struct ppc_link_hash_table *htab;
6383 asection *s;
6384
6385 htab = ppc_hash_table (info);
6386 if (htab == NULL)
6387 return FALSE;
6388
6389 /* Deal with function syms. */
6390 if (h->type == STT_FUNC
6391 || h->type == STT_GNU_IFUNC
6392 || h->needs_plt)
6393 {
6394 /* Clear procedure linkage table information for any symbol that
6395 won't need a .plt entry. */
6396 struct plt_entry *ent;
6397 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6398 if (ent->plt.refcount > 0)
6399 break;
6400 if (ent == NULL
6401 || (h->type != STT_GNU_IFUNC
6402 && (SYMBOL_CALLS_LOCAL (info, h)
6403 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6404 && h->root.type == bfd_link_hash_undefweak))))
6405 {
6406 h->plt.plist = NULL;
6407 h->needs_plt = 0;
6408 }
6409 }
6410 else
6411 h->plt.plist = NULL;
6412
6413 /* If this is a weak symbol, and there is a real definition, the
6414 processor independent code will have arranged for us to see the
6415 real definition first, and we can just use the same value. */
6416 if (h->u.weakdef != NULL)
6417 {
6418 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6419 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6420 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6421 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6422 if (ELIMINATE_COPY_RELOCS)
6423 h->non_got_ref = h->u.weakdef->non_got_ref;
6424 return TRUE;
6425 }
6426
6427 /* If we are creating a shared library, we must presume that the
6428 only references to the symbol are via the global offset table.
6429 For such cases we need not do anything here; the relocations will
6430 be handled correctly by relocate_section. */
6431 if (info->shared)
6432 return TRUE;
6433
6434 /* If there are no references to this symbol that do not use the
6435 GOT, we don't need to generate a copy reloc. */
6436 if (!h->non_got_ref)
6437 return TRUE;
6438
6439 /* Don't generate a copy reloc for symbols defined in the executable. */
6440 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6441 return TRUE;
6442
6443 if (ELIMINATE_COPY_RELOCS)
6444 {
6445 struct ppc_link_hash_entry * eh;
6446 struct ppc_dyn_relocs *p;
6447
6448 eh = (struct ppc_link_hash_entry *) h;
6449 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6450 {
6451 s = p->sec->output_section;
6452 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6453 break;
6454 }
6455
6456 /* If we didn't find any dynamic relocs in read-only sections, then
6457 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6458 if (p == NULL)
6459 {
6460 h->non_got_ref = 0;
6461 return TRUE;
6462 }
6463 }
6464
6465 if (h->plt.plist != NULL)
6466 {
6467 /* We should never get here, but unfortunately there are versions
6468 of gcc out there that improperly (for this ABI) put initialized
6469 function pointers, vtable refs and suchlike in read-only
6470 sections. Allow them to proceed, but warn that this might
6471 break at runtime. */
6472 (*_bfd_error_handler)
6473 (_("copy reloc against `%s' requires lazy plt linking; "
6474 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6475 h->root.root.string);
6476 }
6477
6478 /* This is a reference to a symbol defined by a dynamic object which
6479 is not a function. */
6480
6481 if (h->size == 0)
6482 {
6483 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6484 h->root.root.string);
6485 return TRUE;
6486 }
6487
6488 /* We must allocate the symbol in our .dynbss section, which will
6489 become part of the .bss section of the executable. There will be
6490 an entry for this symbol in the .dynsym section. The dynamic
6491 object will contain position independent code, so all references
6492 from the dynamic object to this symbol will go through the global
6493 offset table. The dynamic linker will use the .dynsym entry to
6494 determine the address it must put in the global offset table, so
6495 both the dynamic object and the regular object will refer to the
6496 same memory location for the variable. */
6497
6498 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6499 to copy the initial value out of the dynamic object and into the
6500 runtime process image. We need to remember the offset into the
6501 .rela.bss section we are going to use. */
6502 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6503 {
6504 htab->relbss->size += sizeof (Elf64_External_Rela);
6505 h->needs_copy = 1;
6506 }
6507
6508 s = htab->dynbss;
6509
6510 return _bfd_elf_adjust_dynamic_copy (h, s);
6511 }
6512
6513 /* If given a function descriptor symbol, hide both the function code
6514 sym and the descriptor. */
6515 static void
6516 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6517 struct elf_link_hash_entry *h,
6518 bfd_boolean force_local)
6519 {
6520 struct ppc_link_hash_entry *eh;
6521 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6522
6523 eh = (struct ppc_link_hash_entry *) h;
6524 if (eh->is_func_descriptor)
6525 {
6526 struct ppc_link_hash_entry *fh = eh->oh;
6527
6528 if (fh == NULL)
6529 {
6530 const char *p, *q;
6531 struct ppc_link_hash_table *htab;
6532 char save;
6533
6534 /* We aren't supposed to use alloca in BFD because on
6535 systems which do not have alloca the version in libiberty
6536 calls xmalloc, which might cause the program to crash
6537 when it runs out of memory. This function doesn't have a
6538 return status, so there's no way to gracefully return an
6539 error. So cheat. We know that string[-1] can be safely
6540 accessed; It's either a string in an ELF string table,
6541 or allocated in an objalloc structure. */
6542
6543 p = eh->elf.root.root.string - 1;
6544 save = *p;
6545 *(char *) p = '.';
6546 htab = ppc_hash_table (info);
6547 if (htab == NULL)
6548 return;
6549
6550 fh = (struct ppc_link_hash_entry *)
6551 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6552 *(char *) p = save;
6553
6554 /* Unfortunately, if it so happens that the string we were
6555 looking for was allocated immediately before this string,
6556 then we overwrote the string terminator. That's the only
6557 reason the lookup should fail. */
6558 if (fh == NULL)
6559 {
6560 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6561 while (q >= eh->elf.root.root.string && *q == *p)
6562 --q, --p;
6563 if (q < eh->elf.root.root.string && *p == '.')
6564 fh = (struct ppc_link_hash_entry *)
6565 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6566 }
6567 if (fh != NULL)
6568 {
6569 eh->oh = fh;
6570 fh->oh = eh;
6571 }
6572 }
6573 if (fh != NULL)
6574 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6575 }
6576 }
6577
6578 static bfd_boolean
6579 get_sym_h (struct elf_link_hash_entry **hp,
6580 Elf_Internal_Sym **symp,
6581 asection **symsecp,
6582 unsigned char **tls_maskp,
6583 Elf_Internal_Sym **locsymsp,
6584 unsigned long r_symndx,
6585 bfd *ibfd)
6586 {
6587 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6588
6589 if (r_symndx >= symtab_hdr->sh_info)
6590 {
6591 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6592 struct elf_link_hash_entry *h;
6593
6594 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6595 h = elf_follow_link (h);
6596
6597 if (hp != NULL)
6598 *hp = h;
6599
6600 if (symp != NULL)
6601 *symp = NULL;
6602
6603 if (symsecp != NULL)
6604 {
6605 asection *symsec = NULL;
6606 if (h->root.type == bfd_link_hash_defined
6607 || h->root.type == bfd_link_hash_defweak)
6608 symsec = h->root.u.def.section;
6609 *symsecp = symsec;
6610 }
6611
6612 if (tls_maskp != NULL)
6613 {
6614 struct ppc_link_hash_entry *eh;
6615
6616 eh = (struct ppc_link_hash_entry *) h;
6617 *tls_maskp = &eh->tls_mask;
6618 }
6619 }
6620 else
6621 {
6622 Elf_Internal_Sym *sym;
6623 Elf_Internal_Sym *locsyms = *locsymsp;
6624
6625 if (locsyms == NULL)
6626 {
6627 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6628 if (locsyms == NULL)
6629 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6630 symtab_hdr->sh_info,
6631 0, NULL, NULL, NULL);
6632 if (locsyms == NULL)
6633 return FALSE;
6634 *locsymsp = locsyms;
6635 }
6636 sym = locsyms + r_symndx;
6637
6638 if (hp != NULL)
6639 *hp = NULL;
6640
6641 if (symp != NULL)
6642 *symp = sym;
6643
6644 if (symsecp != NULL)
6645 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6646
6647 if (tls_maskp != NULL)
6648 {
6649 struct got_entry **lgot_ents;
6650 unsigned char *tls_mask;
6651
6652 tls_mask = NULL;
6653 lgot_ents = elf_local_got_ents (ibfd);
6654 if (lgot_ents != NULL)
6655 {
6656 struct plt_entry **local_plt = (struct plt_entry **)
6657 (lgot_ents + symtab_hdr->sh_info);
6658 unsigned char *lgot_masks = (unsigned char *)
6659 (local_plt + symtab_hdr->sh_info);
6660 tls_mask = &lgot_masks[r_symndx];
6661 }
6662 *tls_maskp = tls_mask;
6663 }
6664 }
6665 return TRUE;
6666 }
6667
6668 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6669 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6670 type suitable for optimization, and 1 otherwise. */
6671
6672 static int
6673 get_tls_mask (unsigned char **tls_maskp,
6674 unsigned long *toc_symndx,
6675 bfd_vma *toc_addend,
6676 Elf_Internal_Sym **locsymsp,
6677 const Elf_Internal_Rela *rel,
6678 bfd *ibfd)
6679 {
6680 unsigned long r_symndx;
6681 int next_r;
6682 struct elf_link_hash_entry *h;
6683 Elf_Internal_Sym *sym;
6684 asection *sec;
6685 bfd_vma off;
6686
6687 r_symndx = ELF64_R_SYM (rel->r_info);
6688 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6689 return 0;
6690
6691 if ((*tls_maskp != NULL && **tls_maskp != 0)
6692 || sec == NULL
6693 || ppc64_elf_section_data (sec) == NULL
6694 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6695 return 1;
6696
6697 /* Look inside a TOC section too. */
6698 if (h != NULL)
6699 {
6700 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6701 off = h->root.u.def.value;
6702 }
6703 else
6704 off = sym->st_value;
6705 off += rel->r_addend;
6706 BFD_ASSERT (off % 8 == 0);
6707 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6708 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6709 if (toc_symndx != NULL)
6710 *toc_symndx = r_symndx;
6711 if (toc_addend != NULL)
6712 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6713 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6714 return 0;
6715 if ((h == NULL || is_static_defined (h))
6716 && (next_r == -1 || next_r == -2))
6717 return 1 - next_r;
6718 return 1;
6719 }
6720
6721 /* Adjust all global syms defined in opd sections. In gcc generated
6722 code for the old ABI, these will already have been done. */
6723
6724 static bfd_boolean
6725 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6726 {
6727 struct ppc_link_hash_entry *eh;
6728 asection *sym_sec;
6729 struct _opd_sec_data *opd;
6730
6731 if (h->root.type == bfd_link_hash_indirect)
6732 return TRUE;
6733
6734 if (h->root.type == bfd_link_hash_warning)
6735 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6736
6737 if (h->root.type != bfd_link_hash_defined
6738 && h->root.type != bfd_link_hash_defweak)
6739 return TRUE;
6740
6741 eh = (struct ppc_link_hash_entry *) h;
6742 if (eh->adjust_done)
6743 return TRUE;
6744
6745 sym_sec = eh->elf.root.u.def.section;
6746 opd = get_opd_info (sym_sec);
6747 if (opd != NULL && opd->adjust != NULL)
6748 {
6749 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6750 if (adjust == -1)
6751 {
6752 /* This entry has been deleted. */
6753 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6754 if (dsec == NULL)
6755 {
6756 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6757 if (elf_discarded_section (dsec))
6758 {
6759 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6760 break;
6761 }
6762 }
6763 eh->elf.root.u.def.value = 0;
6764 eh->elf.root.u.def.section = dsec;
6765 }
6766 else
6767 eh->elf.root.u.def.value += adjust;
6768 eh->adjust_done = 1;
6769 }
6770 return TRUE;
6771 }
6772
6773 /* Handles decrementing dynamic reloc counts for the reloc specified by
6774 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6775 have already been determined. */
6776
6777 static bfd_boolean
6778 dec_dynrel_count (bfd_vma r_info,
6779 asection *sec,
6780 struct bfd_link_info *info,
6781 Elf_Internal_Sym **local_syms,
6782 struct elf_link_hash_entry *h,
6783 asection *sym_sec)
6784 {
6785 enum elf_ppc64_reloc_type r_type;
6786 struct ppc_dyn_relocs *p;
6787 struct ppc_dyn_relocs **pp;
6788
6789 /* Can this reloc be dynamic? This switch, and later tests here
6790 should be kept in sync with the code in check_relocs. */
6791 r_type = ELF64_R_TYPE (r_info);
6792 switch (r_type)
6793 {
6794 default:
6795 return TRUE;
6796
6797 case R_PPC64_TPREL16:
6798 case R_PPC64_TPREL16_LO:
6799 case R_PPC64_TPREL16_HI:
6800 case R_PPC64_TPREL16_HA:
6801 case R_PPC64_TPREL16_DS:
6802 case R_PPC64_TPREL16_LO_DS:
6803 case R_PPC64_TPREL16_HIGHER:
6804 case R_PPC64_TPREL16_HIGHERA:
6805 case R_PPC64_TPREL16_HIGHEST:
6806 case R_PPC64_TPREL16_HIGHESTA:
6807 if (!info->shared)
6808 return TRUE;
6809
6810 case R_PPC64_TPREL64:
6811 case R_PPC64_DTPMOD64:
6812 case R_PPC64_DTPREL64:
6813 case R_PPC64_ADDR64:
6814 case R_PPC64_REL30:
6815 case R_PPC64_REL32:
6816 case R_PPC64_REL64:
6817 case R_PPC64_ADDR14:
6818 case R_PPC64_ADDR14_BRNTAKEN:
6819 case R_PPC64_ADDR14_BRTAKEN:
6820 case R_PPC64_ADDR16:
6821 case R_PPC64_ADDR16_DS:
6822 case R_PPC64_ADDR16_HA:
6823 case R_PPC64_ADDR16_HI:
6824 case R_PPC64_ADDR16_HIGHER:
6825 case R_PPC64_ADDR16_HIGHERA:
6826 case R_PPC64_ADDR16_HIGHEST:
6827 case R_PPC64_ADDR16_HIGHESTA:
6828 case R_PPC64_ADDR16_LO:
6829 case R_PPC64_ADDR16_LO_DS:
6830 case R_PPC64_ADDR24:
6831 case R_PPC64_ADDR32:
6832 case R_PPC64_UADDR16:
6833 case R_PPC64_UADDR32:
6834 case R_PPC64_UADDR64:
6835 case R_PPC64_TOC:
6836 break;
6837 }
6838
6839 if (local_syms != NULL)
6840 {
6841 unsigned long r_symndx;
6842 Elf_Internal_Sym *sym;
6843 bfd *ibfd = sec->owner;
6844
6845 r_symndx = ELF64_R_SYM (r_info);
6846 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6847 return FALSE;
6848 }
6849
6850 if ((info->shared
6851 && (must_be_dyn_reloc (info, r_type)
6852 || (h != NULL
6853 && (!info->symbolic
6854 || h->root.type == bfd_link_hash_defweak
6855 || !h->def_regular))))
6856 || (ELIMINATE_COPY_RELOCS
6857 && !info->shared
6858 && h != NULL
6859 && (h->root.type == bfd_link_hash_defweak
6860 || !h->def_regular)))
6861 ;
6862 else
6863 return TRUE;
6864
6865 if (h != NULL)
6866 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6867 else
6868 {
6869 if (sym_sec != NULL)
6870 {
6871 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6872 pp = (struct ppc_dyn_relocs **) vpp;
6873 }
6874 else
6875 {
6876 void *vpp = &elf_section_data (sec)->local_dynrel;
6877 pp = (struct ppc_dyn_relocs **) vpp;
6878 }
6879
6880 /* elf_gc_sweep may have already removed all dyn relocs associated
6881 with local syms for a given section. Don't report a dynreloc
6882 miscount. */
6883 if (*pp == NULL)
6884 return TRUE;
6885 }
6886
6887 while ((p = *pp) != NULL)
6888 {
6889 if (p->sec == sec)
6890 {
6891 if (!must_be_dyn_reloc (info, r_type))
6892 p->pc_count -= 1;
6893 p->count -= 1;
6894 if (p->count == 0)
6895 *pp = p->next;
6896 return TRUE;
6897 }
6898 pp = &p->next;
6899 }
6900
6901 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6902 sec->owner, sec);
6903 bfd_set_error (bfd_error_bad_value);
6904 return FALSE;
6905 }
6906
6907 /* Remove unused Official Procedure Descriptor entries. Currently we
6908 only remove those associated with functions in discarded link-once
6909 sections, or weakly defined functions that have been overridden. It
6910 would be possible to remove many more entries for statically linked
6911 applications. */
6912
6913 bfd_boolean
6914 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6915 {
6916 bfd *ibfd;
6917 bfd_boolean some_edited = FALSE;
6918 asection *need_pad = NULL;
6919
6920 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6921 {
6922 asection *sec;
6923 Elf_Internal_Rela *relstart, *rel, *relend;
6924 Elf_Internal_Shdr *symtab_hdr;
6925 Elf_Internal_Sym *local_syms;
6926 bfd_vma offset;
6927 struct _opd_sec_data *opd;
6928 bfd_boolean need_edit, add_aux_fields;
6929 bfd_size_type cnt_16b = 0;
6930
6931 if (!is_ppc64_elf (ibfd))
6932 continue;
6933
6934 sec = bfd_get_section_by_name (ibfd, ".opd");
6935 if (sec == NULL || sec->size == 0)
6936 continue;
6937
6938 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6939 continue;
6940
6941 if (sec->output_section == bfd_abs_section_ptr)
6942 continue;
6943
6944 /* Look through the section relocs. */
6945 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6946 continue;
6947
6948 local_syms = NULL;
6949 symtab_hdr = &elf_symtab_hdr (ibfd);
6950
6951 /* Read the relocations. */
6952 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6953 info->keep_memory);
6954 if (relstart == NULL)
6955 return FALSE;
6956
6957 /* First run through the relocs to check they are sane, and to
6958 determine whether we need to edit this opd section. */
6959 need_edit = FALSE;
6960 need_pad = sec;
6961 offset = 0;
6962 relend = relstart + sec->reloc_count;
6963 for (rel = relstart; rel < relend; )
6964 {
6965 enum elf_ppc64_reloc_type r_type;
6966 unsigned long r_symndx;
6967 asection *sym_sec;
6968 struct elf_link_hash_entry *h;
6969 Elf_Internal_Sym *sym;
6970
6971 /* .opd contains a regular array of 16 or 24 byte entries. We're
6972 only interested in the reloc pointing to a function entry
6973 point. */
6974 if (rel->r_offset != offset
6975 || rel + 1 >= relend
6976 || (rel + 1)->r_offset != offset + 8)
6977 {
6978 /* If someone messes with .opd alignment then after a
6979 "ld -r" we might have padding in the middle of .opd.
6980 Also, there's nothing to prevent someone putting
6981 something silly in .opd with the assembler. No .opd
6982 optimization for them! */
6983 broken_opd:
6984 (*_bfd_error_handler)
6985 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6986 need_edit = FALSE;
6987 break;
6988 }
6989
6990 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6991 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6992 {
6993 (*_bfd_error_handler)
6994 (_("%B: unexpected reloc type %u in .opd section"),
6995 ibfd, r_type);
6996 need_edit = FALSE;
6997 break;
6998 }
6999
7000 r_symndx = ELF64_R_SYM (rel->r_info);
7001 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7002 r_symndx, ibfd))
7003 goto error_ret;
7004
7005 if (sym_sec == NULL || sym_sec->owner == NULL)
7006 {
7007 const char *sym_name;
7008 if (h != NULL)
7009 sym_name = h->root.root.string;
7010 else
7011 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7012 sym_sec);
7013
7014 (*_bfd_error_handler)
7015 (_("%B: undefined sym `%s' in .opd section"),
7016 ibfd, sym_name);
7017 need_edit = FALSE;
7018 break;
7019 }
7020
7021 /* opd entries are always for functions defined in the
7022 current input bfd. If the symbol isn't defined in the
7023 input bfd, then we won't be using the function in this
7024 bfd; It must be defined in a linkonce section in another
7025 bfd, or is weak. It's also possible that we are
7026 discarding the function due to a linker script /DISCARD/,
7027 which we test for via the output_section. */
7028 if (sym_sec->owner != ibfd
7029 || sym_sec->output_section == bfd_abs_section_ptr)
7030 need_edit = TRUE;
7031
7032 rel += 2;
7033 if (rel == relend
7034 || (rel + 1 == relend && rel->r_offset == offset + 16))
7035 {
7036 if (sec->size == offset + 24)
7037 {
7038 need_pad = NULL;
7039 break;
7040 }
7041 if (rel == relend && sec->size == offset + 16)
7042 {
7043 cnt_16b++;
7044 break;
7045 }
7046 goto broken_opd;
7047 }
7048
7049 if (rel->r_offset == offset + 24)
7050 offset += 24;
7051 else if (rel->r_offset != offset + 16)
7052 goto broken_opd;
7053 else if (rel + 1 < relend
7054 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7055 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7056 {
7057 offset += 16;
7058 cnt_16b++;
7059 }
7060 else if (rel + 2 < relend
7061 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7062 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7063 {
7064 offset += 24;
7065 rel += 1;
7066 }
7067 else
7068 goto broken_opd;
7069 }
7070
7071 add_aux_fields = non_overlapping && cnt_16b > 0;
7072
7073 if (need_edit || add_aux_fields)
7074 {
7075 Elf_Internal_Rela *write_rel;
7076 Elf_Internal_Shdr *rel_hdr;
7077 bfd_byte *rptr, *wptr;
7078 bfd_byte *new_contents;
7079 bfd_boolean skip;
7080 long opd_ent_size;
7081 bfd_size_type amt;
7082
7083 new_contents = NULL;
7084 amt = sec->size * sizeof (long) / 8;
7085 opd = &ppc64_elf_section_data (sec)->u.opd;
7086 opd->adjust = bfd_zalloc (sec->owner, amt);
7087 if (opd->adjust == NULL)
7088 return FALSE;
7089 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7090
7091 /* This seems a waste of time as input .opd sections are all
7092 zeros as generated by gcc, but I suppose there's no reason
7093 this will always be so. We might start putting something in
7094 the third word of .opd entries. */
7095 if ((sec->flags & SEC_IN_MEMORY) == 0)
7096 {
7097 bfd_byte *loc;
7098 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7099 {
7100 if (loc != NULL)
7101 free (loc);
7102 error_ret:
7103 if (local_syms != NULL
7104 && symtab_hdr->contents != (unsigned char *) local_syms)
7105 free (local_syms);
7106 if (elf_section_data (sec)->relocs != relstart)
7107 free (relstart);
7108 return FALSE;
7109 }
7110 sec->contents = loc;
7111 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7112 }
7113
7114 elf_section_data (sec)->relocs = relstart;
7115
7116 new_contents = sec->contents;
7117 if (add_aux_fields)
7118 {
7119 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7120 if (new_contents == NULL)
7121 return FALSE;
7122 need_pad = FALSE;
7123 }
7124 wptr = new_contents;
7125 rptr = sec->contents;
7126
7127 write_rel = relstart;
7128 skip = FALSE;
7129 offset = 0;
7130 opd_ent_size = 0;
7131 for (rel = relstart; rel < relend; rel++)
7132 {
7133 unsigned long r_symndx;
7134 asection *sym_sec;
7135 struct elf_link_hash_entry *h;
7136 Elf_Internal_Sym *sym;
7137
7138 r_symndx = ELF64_R_SYM (rel->r_info);
7139 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7140 r_symndx, ibfd))
7141 goto error_ret;
7142
7143 if (rel->r_offset == offset)
7144 {
7145 struct ppc_link_hash_entry *fdh = NULL;
7146
7147 /* See if the .opd entry is full 24 byte or
7148 16 byte (with fd_aux entry overlapped with next
7149 fd_func). */
7150 opd_ent_size = 24;
7151 if ((rel + 2 == relend && sec->size == offset + 16)
7152 || (rel + 3 < relend
7153 && rel[2].r_offset == offset + 16
7154 && rel[3].r_offset == offset + 24
7155 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7156 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7157 opd_ent_size = 16;
7158
7159 if (h != NULL
7160 && h->root.root.string[0] == '.')
7161 {
7162 struct ppc_link_hash_table *htab;
7163
7164 htab = ppc_hash_table (info);
7165 if (htab != NULL)
7166 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7167 htab);
7168 if (fdh != NULL
7169 && fdh->elf.root.type != bfd_link_hash_defined
7170 && fdh->elf.root.type != bfd_link_hash_defweak)
7171 fdh = NULL;
7172 }
7173
7174 skip = (sym_sec->owner != ibfd
7175 || sym_sec->output_section == bfd_abs_section_ptr);
7176 if (skip)
7177 {
7178 if (fdh != NULL && sym_sec->owner == ibfd)
7179 {
7180 /* Arrange for the function descriptor sym
7181 to be dropped. */
7182 fdh->elf.root.u.def.value = 0;
7183 fdh->elf.root.u.def.section = sym_sec;
7184 }
7185 opd->adjust[rel->r_offset / 8] = -1;
7186 }
7187 else
7188 {
7189 /* We'll be keeping this opd entry. */
7190
7191 if (fdh != NULL)
7192 {
7193 /* Redefine the function descriptor symbol to
7194 this location in the opd section. It is
7195 necessary to update the value here rather
7196 than using an array of adjustments as we do
7197 for local symbols, because various places
7198 in the generic ELF code use the value
7199 stored in u.def.value. */
7200 fdh->elf.root.u.def.value = wptr - new_contents;
7201 fdh->adjust_done = 1;
7202 }
7203
7204 /* Local syms are a bit tricky. We could
7205 tweak them as they can be cached, but
7206 we'd need to look through the local syms
7207 for the function descriptor sym which we
7208 don't have at the moment. So keep an
7209 array of adjustments. */
7210 opd->adjust[rel->r_offset / 8]
7211 = (wptr - new_contents) - (rptr - sec->contents);
7212
7213 if (wptr != rptr)
7214 memcpy (wptr, rptr, opd_ent_size);
7215 wptr += opd_ent_size;
7216 if (add_aux_fields && opd_ent_size == 16)
7217 {
7218 memset (wptr, '\0', 8);
7219 wptr += 8;
7220 }
7221 }
7222 rptr += opd_ent_size;
7223 offset += opd_ent_size;
7224 }
7225
7226 if (skip)
7227 {
7228 if (!NO_OPD_RELOCS
7229 && !info->relocatable
7230 && !dec_dynrel_count (rel->r_info, sec, info,
7231 NULL, h, sym_sec))
7232 goto error_ret;
7233 }
7234 else
7235 {
7236 /* We need to adjust any reloc offsets to point to the
7237 new opd entries. While we're at it, we may as well
7238 remove redundant relocs. */
7239 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7240 if (write_rel != rel)
7241 memcpy (write_rel, rel, sizeof (*rel));
7242 ++write_rel;
7243 }
7244 }
7245
7246 sec->size = wptr - new_contents;
7247 sec->reloc_count = write_rel - relstart;
7248 if (add_aux_fields)
7249 {
7250 free (sec->contents);
7251 sec->contents = new_contents;
7252 }
7253
7254 /* Fudge the header size too, as this is used later in
7255 elf_bfd_final_link if we are emitting relocs. */
7256 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7257 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7258 some_edited = TRUE;
7259 }
7260 else if (elf_section_data (sec)->relocs != relstart)
7261 free (relstart);
7262
7263 if (local_syms != NULL
7264 && symtab_hdr->contents != (unsigned char *) local_syms)
7265 {
7266 if (!info->keep_memory)
7267 free (local_syms);
7268 else
7269 symtab_hdr->contents = (unsigned char *) local_syms;
7270 }
7271 }
7272
7273 if (some_edited)
7274 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7275
7276 /* If we are doing a final link and the last .opd entry is just 16 byte
7277 long, add a 8 byte padding after it. */
7278 if (need_pad != NULL && !info->relocatable)
7279 {
7280 bfd_byte *p;
7281
7282 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7283 {
7284 BFD_ASSERT (need_pad->size > 0);
7285
7286 p = bfd_malloc (need_pad->size + 8);
7287 if (p == NULL)
7288 return FALSE;
7289
7290 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7291 p, 0, need_pad->size))
7292 return FALSE;
7293
7294 need_pad->contents = p;
7295 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7296 }
7297 else
7298 {
7299 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7300 if (p == NULL)
7301 return FALSE;
7302
7303 need_pad->contents = p;
7304 }
7305
7306 memset (need_pad->contents + need_pad->size, 0, 8);
7307 need_pad->size += 8;
7308 }
7309
7310 return TRUE;
7311 }
7312
7313 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7314
7315 asection *
7316 ppc64_elf_tls_setup (struct bfd_link_info *info,
7317 int no_tls_get_addr_opt,
7318 int *no_multi_toc)
7319 {
7320 struct ppc_link_hash_table *htab;
7321
7322 htab = ppc_hash_table (info);
7323 if (htab == NULL)
7324 return NULL;
7325
7326 if (*no_multi_toc)
7327 htab->do_multi_toc = 0;
7328 else if (!htab->do_multi_toc)
7329 *no_multi_toc = 1;
7330
7331 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7332 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7333 FALSE, FALSE, TRUE));
7334 /* Move dynamic linking info to the function descriptor sym. */
7335 if (htab->tls_get_addr != NULL)
7336 func_desc_adjust (&htab->tls_get_addr->elf, info);
7337 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7338 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7339 FALSE, FALSE, TRUE));
7340 if (!no_tls_get_addr_opt)
7341 {
7342 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7343
7344 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7345 FALSE, FALSE, TRUE);
7346 if (opt != NULL)
7347 func_desc_adjust (opt, info);
7348 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7349 FALSE, FALSE, TRUE);
7350 if (opt_fd != NULL
7351 && (opt_fd->root.type == bfd_link_hash_defined
7352 || opt_fd->root.type == bfd_link_hash_defweak))
7353 {
7354 /* If glibc supports an optimized __tls_get_addr call stub,
7355 signalled by the presence of __tls_get_addr_opt, and we'll
7356 be calling __tls_get_addr via a plt call stub, then
7357 make __tls_get_addr point to __tls_get_addr_opt. */
7358 tga_fd = &htab->tls_get_addr_fd->elf;
7359 if (htab->elf.dynamic_sections_created
7360 && tga_fd != NULL
7361 && (tga_fd->type == STT_FUNC
7362 || tga_fd->needs_plt)
7363 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7364 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7365 && tga_fd->root.type == bfd_link_hash_undefweak)))
7366 {
7367 struct plt_entry *ent;
7368
7369 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7370 if (ent->plt.refcount > 0)
7371 break;
7372 if (ent != NULL)
7373 {
7374 tga_fd->root.type = bfd_link_hash_indirect;
7375 tga_fd->root.u.i.link = &opt_fd->root;
7376 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7377 if (opt_fd->dynindx != -1)
7378 {
7379 /* Use __tls_get_addr_opt in dynamic relocations. */
7380 opt_fd->dynindx = -1;
7381 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7382 opt_fd->dynstr_index);
7383 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7384 return NULL;
7385 }
7386 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7387 tga = &htab->tls_get_addr->elf;
7388 if (opt != NULL && tga != NULL)
7389 {
7390 tga->root.type = bfd_link_hash_indirect;
7391 tga->root.u.i.link = &opt->root;
7392 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7393 _bfd_elf_link_hash_hide_symbol (info, opt,
7394 tga->forced_local);
7395 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7396 }
7397 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7398 htab->tls_get_addr_fd->is_func_descriptor = 1;
7399 if (htab->tls_get_addr != NULL)
7400 {
7401 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7402 htab->tls_get_addr->is_func = 1;
7403 }
7404 }
7405 }
7406 }
7407 else
7408 no_tls_get_addr_opt = TRUE;
7409 }
7410 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7411 return _bfd_elf_tls_setup (info->output_bfd, info);
7412 }
7413
7414 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7415 HASH1 or HASH2. */
7416
7417 static bfd_boolean
7418 branch_reloc_hash_match (const bfd *ibfd,
7419 const Elf_Internal_Rela *rel,
7420 const struct ppc_link_hash_entry *hash1,
7421 const struct ppc_link_hash_entry *hash2)
7422 {
7423 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7424 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7425 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7426
7427 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7428 {
7429 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7430 struct elf_link_hash_entry *h;
7431
7432 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7433 h = elf_follow_link (h);
7434 if (h == &hash1->elf || h == &hash2->elf)
7435 return TRUE;
7436 }
7437 return FALSE;
7438 }
7439
7440 /* Run through all the TLS relocs looking for optimization
7441 opportunities. The linker has been hacked (see ppc64elf.em) to do
7442 a preliminary section layout so that we know the TLS segment
7443 offsets. We can't optimize earlier because some optimizations need
7444 to know the tp offset, and we need to optimize before allocating
7445 dynamic relocations. */
7446
7447 bfd_boolean
7448 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7449 {
7450 bfd *ibfd;
7451 asection *sec;
7452 struct ppc_link_hash_table *htab;
7453 int pass;
7454
7455 if (info->relocatable || !info->executable)
7456 return TRUE;
7457
7458 htab = ppc_hash_table (info);
7459 if (htab == NULL)
7460 return FALSE;
7461
7462 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7463 {
7464 Elf_Internal_Sym *locsyms = NULL;
7465 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7466 unsigned char *toc_ref = NULL;
7467
7468 /* Look at all the sections for this file. Make two passes over
7469 the relocs. On the first pass, mark toc entries involved
7470 with tls relocs, and check that tls relocs involved in
7471 setting up a tls_get_addr call are indeed followed by such a
7472 call. If they are not, exclude them from the optimizations
7473 done on the second pass. */
7474 for (pass = 0; pass < 2; ++pass)
7475 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7476 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7477 {
7478 Elf_Internal_Rela *relstart, *rel, *relend;
7479
7480 /* Read the relocations. */
7481 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7482 info->keep_memory);
7483 if (relstart == NULL)
7484 return FALSE;
7485
7486 relend = relstart + sec->reloc_count;
7487 for (rel = relstart; rel < relend; rel++)
7488 {
7489 enum elf_ppc64_reloc_type r_type;
7490 unsigned long r_symndx;
7491 struct elf_link_hash_entry *h;
7492 Elf_Internal_Sym *sym;
7493 asection *sym_sec;
7494 unsigned char *tls_mask;
7495 unsigned char tls_set, tls_clear, tls_type = 0;
7496 bfd_vma value;
7497 bfd_boolean ok_tprel, is_local;
7498 long toc_ref_index = 0;
7499 int expecting_tls_get_addr = 0;
7500
7501 r_symndx = ELF64_R_SYM (rel->r_info);
7502 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7503 r_symndx, ibfd))
7504 {
7505 err_free_rel:
7506 if (elf_section_data (sec)->relocs != relstart)
7507 free (relstart);
7508 if (toc_ref != NULL)
7509 free (toc_ref);
7510 if (locsyms != NULL
7511 && (elf_symtab_hdr (ibfd).contents
7512 != (unsigned char *) locsyms))
7513 free (locsyms);
7514 return FALSE;
7515 }
7516
7517 if (h != NULL)
7518 {
7519 if (h->root.type == bfd_link_hash_defined
7520 || h->root.type == bfd_link_hash_defweak)
7521 value = h->root.u.def.value;
7522 else if (h->root.type == bfd_link_hash_undefweak)
7523 value = 0;
7524 else
7525 continue;
7526 }
7527 else
7528 /* Symbols referenced by TLS relocs must be of type
7529 STT_TLS. So no need for .opd local sym adjust. */
7530 value = sym->st_value;
7531
7532 ok_tprel = FALSE;
7533 is_local = FALSE;
7534 if (h == NULL
7535 || !h->def_dynamic)
7536 {
7537 is_local = TRUE;
7538 if (h != NULL
7539 && h->root.type == bfd_link_hash_undefweak)
7540 ok_tprel = TRUE;
7541 else
7542 {
7543 value += sym_sec->output_offset;
7544 value += sym_sec->output_section->vma;
7545 value -= htab->elf.tls_sec->vma;
7546 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7547 < (bfd_vma) 1 << 32);
7548 }
7549 }
7550
7551 r_type = ELF64_R_TYPE (rel->r_info);
7552 switch (r_type)
7553 {
7554 case R_PPC64_GOT_TLSLD16:
7555 case R_PPC64_GOT_TLSLD16_LO:
7556 expecting_tls_get_addr = 1;
7557 /* Fall thru */
7558
7559 case R_PPC64_GOT_TLSLD16_HI:
7560 case R_PPC64_GOT_TLSLD16_HA:
7561 /* These relocs should never be against a symbol
7562 defined in a shared lib. Leave them alone if
7563 that turns out to be the case. */
7564 if (!is_local)
7565 continue;
7566
7567 /* LD -> LE */
7568 tls_set = 0;
7569 tls_clear = TLS_LD;
7570 tls_type = TLS_TLS | TLS_LD;
7571 break;
7572
7573 case R_PPC64_GOT_TLSGD16:
7574 case R_PPC64_GOT_TLSGD16_LO:
7575 expecting_tls_get_addr = 1;
7576 /* Fall thru */
7577
7578 case R_PPC64_GOT_TLSGD16_HI:
7579 case R_PPC64_GOT_TLSGD16_HA:
7580 if (ok_tprel)
7581 /* GD -> LE */
7582 tls_set = 0;
7583 else
7584 /* GD -> IE */
7585 tls_set = TLS_TLS | TLS_TPRELGD;
7586 tls_clear = TLS_GD;
7587 tls_type = TLS_TLS | TLS_GD;
7588 break;
7589
7590 case R_PPC64_GOT_TPREL16_DS:
7591 case R_PPC64_GOT_TPREL16_LO_DS:
7592 case R_PPC64_GOT_TPREL16_HI:
7593 case R_PPC64_GOT_TPREL16_HA:
7594 if (ok_tprel)
7595 {
7596 /* IE -> LE */
7597 tls_set = 0;
7598 tls_clear = TLS_TPREL;
7599 tls_type = TLS_TLS | TLS_TPREL;
7600 break;
7601 }
7602 continue;
7603
7604 case R_PPC64_TOC16:
7605 case R_PPC64_TOC16_LO:
7606 case R_PPC64_TLS:
7607 case R_PPC64_TLSGD:
7608 case R_PPC64_TLSLD:
7609 if (sym_sec == NULL || sym_sec != toc)
7610 continue;
7611
7612 /* Mark this toc entry as referenced by a TLS
7613 code sequence. We can do that now in the
7614 case of R_PPC64_TLS, and after checking for
7615 tls_get_addr for the TOC16 relocs. */
7616 if (toc_ref == NULL)
7617 {
7618 toc_ref = bfd_zmalloc (toc->size / 8);
7619 if (toc_ref == NULL)
7620 goto err_free_rel;
7621 }
7622 if (h != NULL)
7623 value = h->root.u.def.value;
7624 else
7625 value = sym->st_value;
7626 value += rel->r_addend;
7627 BFD_ASSERT (value < toc->size && value % 8 == 0);
7628 toc_ref_index = value / 8;
7629 if (r_type == R_PPC64_TLS
7630 || r_type == R_PPC64_TLSGD
7631 || r_type == R_PPC64_TLSLD)
7632 {
7633 toc_ref[toc_ref_index] = 1;
7634 continue;
7635 }
7636
7637 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7638 continue;
7639
7640 tls_set = 0;
7641 tls_clear = 0;
7642 expecting_tls_get_addr = 2;
7643 break;
7644
7645 case R_PPC64_TPREL64:
7646 if (pass == 0
7647 || sec != toc
7648 || toc_ref == NULL
7649 || !toc_ref[rel->r_offset / 8])
7650 continue;
7651 if (ok_tprel)
7652 {
7653 /* IE -> LE */
7654 tls_set = TLS_EXPLICIT;
7655 tls_clear = TLS_TPREL;
7656 break;
7657 }
7658 continue;
7659
7660 case R_PPC64_DTPMOD64:
7661 if (pass == 0
7662 || sec != toc
7663 || toc_ref == NULL
7664 || !toc_ref[rel->r_offset / 8])
7665 continue;
7666 if (rel + 1 < relend
7667 && (rel[1].r_info
7668 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7669 && rel[1].r_offset == rel->r_offset + 8)
7670 {
7671 if (ok_tprel)
7672 /* GD -> LE */
7673 tls_set = TLS_EXPLICIT | TLS_GD;
7674 else
7675 /* GD -> IE */
7676 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7677 tls_clear = TLS_GD;
7678 }
7679 else
7680 {
7681 if (!is_local)
7682 continue;
7683
7684 /* LD -> LE */
7685 tls_set = TLS_EXPLICIT;
7686 tls_clear = TLS_LD;
7687 }
7688 break;
7689
7690 default:
7691 continue;
7692 }
7693
7694 if (pass == 0)
7695 {
7696 if (!expecting_tls_get_addr
7697 || !sec->has_tls_get_addr_call)
7698 continue;
7699
7700 if (rel + 1 < relend
7701 && branch_reloc_hash_match (ibfd, rel + 1,
7702 htab->tls_get_addr,
7703 htab->tls_get_addr_fd))
7704 {
7705 if (expecting_tls_get_addr == 2)
7706 {
7707 /* Check for toc tls entries. */
7708 unsigned char *toc_tls;
7709 int retval;
7710
7711 retval = get_tls_mask (&toc_tls, NULL, NULL,
7712 &locsyms,
7713 rel, ibfd);
7714 if (retval == 0)
7715 goto err_free_rel;
7716 if (retval > 1 && toc_tls != NULL)
7717 toc_ref[toc_ref_index] = 1;
7718 }
7719 continue;
7720 }
7721
7722 if (expecting_tls_get_addr != 1)
7723 continue;
7724
7725 /* Uh oh, we didn't find the expected call. We
7726 could just mark this symbol to exclude it
7727 from tls optimization but it's safer to skip
7728 the entire section. */
7729 sec->has_tls_reloc = 0;
7730 break;
7731 }
7732
7733 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7734 {
7735 struct plt_entry *ent;
7736 for (ent = htab->tls_get_addr->elf.plt.plist;
7737 ent != NULL;
7738 ent = ent->next)
7739 if (ent->addend == 0)
7740 {
7741 if (ent->plt.refcount > 0)
7742 {
7743 ent->plt.refcount -= 1;
7744 expecting_tls_get_addr = 0;
7745 }
7746 break;
7747 }
7748 }
7749
7750 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7751 {
7752 struct plt_entry *ent;
7753 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7754 ent != NULL;
7755 ent = ent->next)
7756 if (ent->addend == 0)
7757 {
7758 if (ent->plt.refcount > 0)
7759 ent->plt.refcount -= 1;
7760 break;
7761 }
7762 }
7763
7764 if (tls_clear == 0)
7765 continue;
7766
7767 if ((tls_set & TLS_EXPLICIT) == 0)
7768 {
7769 struct got_entry *ent;
7770
7771 /* Adjust got entry for this reloc. */
7772 if (h != NULL)
7773 ent = h->got.glist;
7774 else
7775 ent = elf_local_got_ents (ibfd)[r_symndx];
7776
7777 for (; ent != NULL; ent = ent->next)
7778 if (ent->addend == rel->r_addend
7779 && ent->owner == ibfd
7780 && ent->tls_type == tls_type)
7781 break;
7782 if (ent == NULL)
7783 abort ();
7784
7785 if (tls_set == 0)
7786 {
7787 /* We managed to get rid of a got entry. */
7788 if (ent->got.refcount > 0)
7789 ent->got.refcount -= 1;
7790 }
7791 }
7792 else
7793 {
7794 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7795 we'll lose one or two dyn relocs. */
7796 if (!dec_dynrel_count (rel->r_info, sec, info,
7797 NULL, h, sym_sec))
7798 return FALSE;
7799
7800 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7801 {
7802 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7803 NULL, h, sym_sec))
7804 return FALSE;
7805 }
7806 }
7807
7808 *tls_mask |= tls_set;
7809 *tls_mask &= ~tls_clear;
7810 }
7811
7812 if (elf_section_data (sec)->relocs != relstart)
7813 free (relstart);
7814 }
7815
7816 if (toc_ref != NULL)
7817 free (toc_ref);
7818
7819 if (locsyms != NULL
7820 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7821 {
7822 if (!info->keep_memory)
7823 free (locsyms);
7824 else
7825 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7826 }
7827 }
7828 return TRUE;
7829 }
7830
7831 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7832 the values of any global symbols in a toc section that has been
7833 edited. Globals in toc sections should be a rarity, so this function
7834 sets a flag if any are found in toc sections other than the one just
7835 edited, so that futher hash table traversals can be avoided. */
7836
7837 struct adjust_toc_info
7838 {
7839 asection *toc;
7840 unsigned long *skip;
7841 bfd_boolean global_toc_syms;
7842 };
7843
7844 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7845
7846 static bfd_boolean
7847 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7848 {
7849 struct ppc_link_hash_entry *eh;
7850 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7851 unsigned long i;
7852
7853 if (h->root.type == bfd_link_hash_indirect)
7854 return TRUE;
7855
7856 if (h->root.type == bfd_link_hash_warning)
7857 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7858
7859 if (h->root.type != bfd_link_hash_defined
7860 && h->root.type != bfd_link_hash_defweak)
7861 return TRUE;
7862
7863 eh = (struct ppc_link_hash_entry *) h;
7864 if (eh->adjust_done)
7865 return TRUE;
7866
7867 if (eh->elf.root.u.def.section == toc_inf->toc)
7868 {
7869 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7870 i = toc_inf->toc->rawsize >> 3;
7871 else
7872 i = eh->elf.root.u.def.value >> 3;
7873
7874 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7875 {
7876 (*_bfd_error_handler)
7877 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7878 do
7879 ++i;
7880 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7881 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7882 }
7883
7884 eh->elf.root.u.def.value -= toc_inf->skip[i];
7885 eh->adjust_done = 1;
7886 }
7887 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7888 toc_inf->global_toc_syms = TRUE;
7889
7890 return TRUE;
7891 }
7892
7893 /* Examine all relocs referencing .toc sections in order to remove
7894 unused .toc entries. */
7895
7896 bfd_boolean
7897 ppc64_elf_edit_toc (struct bfd_link_info *info)
7898 {
7899 bfd *ibfd;
7900 struct adjust_toc_info toc_inf;
7901 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7902
7903 htab->do_toc_opt = 1;
7904 toc_inf.global_toc_syms = TRUE;
7905 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7906 {
7907 asection *toc, *sec;
7908 Elf_Internal_Shdr *symtab_hdr;
7909 Elf_Internal_Sym *local_syms;
7910 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
7911 unsigned long *skip, *drop;
7912 unsigned char *used;
7913 unsigned char *keep, last, some_unused;
7914
7915 if (!is_ppc64_elf (ibfd))
7916 continue;
7917
7918 toc = bfd_get_section_by_name (ibfd, ".toc");
7919 if (toc == NULL
7920 || toc->size == 0
7921 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7922 || elf_discarded_section (toc))
7923 continue;
7924
7925 toc_relocs = NULL;
7926 local_syms = NULL;
7927 symtab_hdr = &elf_symtab_hdr (ibfd);
7928
7929 /* Look at sections dropped from the final link. */
7930 skip = NULL;
7931 relstart = NULL;
7932 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7933 {
7934 if (sec->reloc_count == 0
7935 || !elf_discarded_section (sec)
7936 || get_opd_info (sec)
7937 || (sec->flags & SEC_ALLOC) == 0
7938 || (sec->flags & SEC_DEBUGGING) != 0)
7939 continue;
7940
7941 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7942 if (relstart == NULL)
7943 goto error_ret;
7944
7945 /* Run through the relocs to see which toc entries might be
7946 unused. */
7947 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7948 {
7949 enum elf_ppc64_reloc_type r_type;
7950 unsigned long r_symndx;
7951 asection *sym_sec;
7952 struct elf_link_hash_entry *h;
7953 Elf_Internal_Sym *sym;
7954 bfd_vma val;
7955
7956 r_type = ELF64_R_TYPE (rel->r_info);
7957 switch (r_type)
7958 {
7959 default:
7960 continue;
7961
7962 case R_PPC64_TOC16:
7963 case R_PPC64_TOC16_LO:
7964 case R_PPC64_TOC16_HI:
7965 case R_PPC64_TOC16_HA:
7966 case R_PPC64_TOC16_DS:
7967 case R_PPC64_TOC16_LO_DS:
7968 break;
7969 }
7970
7971 r_symndx = ELF64_R_SYM (rel->r_info);
7972 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7973 r_symndx, ibfd))
7974 goto error_ret;
7975
7976 if (sym_sec != toc)
7977 continue;
7978
7979 if (h != NULL)
7980 val = h->root.u.def.value;
7981 else
7982 val = sym->st_value;
7983 val += rel->r_addend;
7984
7985 if (val >= toc->size)
7986 continue;
7987
7988 /* Anything in the toc ought to be aligned to 8 bytes.
7989 If not, don't mark as unused. */
7990 if (val & 7)
7991 continue;
7992
7993 if (skip == NULL)
7994 {
7995 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
7996 if (skip == NULL)
7997 goto error_ret;
7998 }
7999
8000 skip[val >> 3] = ref_from_discarded;
8001 }
8002
8003 if (elf_section_data (sec)->relocs != relstart)
8004 free (relstart);
8005 }
8006
8007 /* For largetoc loads of address constants, we can convert
8008 . addis rx,2,addr@got@ha
8009 . ld ry,addr@got@l(rx)
8010 to
8011 . addis rx,2,addr@toc@ha
8012 . addi ry,rx,addr@toc@l
8013 when addr is within 2G of the toc pointer. This then means
8014 that the word storing "addr" in the toc is no longer needed. */
8015
8016 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8017 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8018 && toc->reloc_count != 0)
8019 {
8020 /* Read toc relocs. */
8021 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8022 info->keep_memory);
8023 if (toc_relocs == NULL)
8024 goto error_ret;
8025
8026 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8027 {
8028 enum elf_ppc64_reloc_type r_type;
8029 unsigned long r_symndx;
8030 asection *sym_sec;
8031 struct elf_link_hash_entry *h;
8032 Elf_Internal_Sym *sym;
8033 bfd_vma val, addr;
8034
8035 r_type = ELF64_R_TYPE (rel->r_info);
8036 if (r_type != R_PPC64_ADDR64)
8037 continue;
8038
8039 r_symndx = ELF64_R_SYM (rel->r_info);
8040 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8041 r_symndx, ibfd))
8042 goto error_ret;
8043
8044 if (sym_sec == NULL
8045 || elf_discarded_section (sym_sec))
8046 continue;
8047
8048 if (!SYMBOL_CALLS_LOCAL (info, h))
8049 continue;
8050
8051 if (h != NULL)
8052 {
8053 if (h->type == STT_GNU_IFUNC)
8054 continue;
8055 val = h->root.u.def.value;
8056 }
8057 else
8058 {
8059 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8060 continue;
8061 val = sym->st_value;
8062 }
8063 val += rel->r_addend;
8064 val += sym_sec->output_section->vma + sym_sec->output_offset;
8065
8066 /* We don't yet know the exact toc pointer value, but we
8067 know it will be somewhere in the toc section. Don't
8068 optimize if the difference from any possible toc
8069 pointer is outside [ff..f80008000, 7fff7fff]. */
8070 addr = toc->output_section->vma + TOC_BASE_OFF;
8071 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8072 continue;
8073
8074 addr = toc->output_section->vma + toc->output_section->rawsize;
8075 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8076 continue;
8077
8078 if (skip == NULL)
8079 {
8080 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8081 if (skip == NULL)
8082 goto error_ret;
8083 }
8084
8085 skip[rel->r_offset >> 3]
8086 |= can_optimize | ((rel - toc_relocs) << 2);
8087 }
8088 }
8089
8090 if (skip == NULL)
8091 continue;
8092
8093 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8094 if (used == NULL)
8095 {
8096 error_ret:
8097 if (local_syms != NULL
8098 && symtab_hdr->contents != (unsigned char *) local_syms)
8099 free (local_syms);
8100 if (sec != NULL
8101 && relstart != NULL
8102 && elf_section_data (sec)->relocs != relstart)
8103 free (relstart);
8104 if (toc_relocs != NULL
8105 && elf_section_data (toc)->relocs != toc_relocs)
8106 free (toc_relocs);
8107 if (skip != NULL)
8108 free (skip);
8109 return FALSE;
8110 }
8111
8112 /* Now check all kept sections that might reference the toc.
8113 Check the toc itself last. */
8114 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8115 : ibfd->sections);
8116 sec != NULL;
8117 sec = (sec == toc ? NULL
8118 : sec->next == NULL ? toc
8119 : sec->next == toc && toc->next ? toc->next
8120 : sec->next))
8121 {
8122 int repeat;
8123
8124 if (sec->reloc_count == 0
8125 || elf_discarded_section (sec)
8126 || get_opd_info (sec)
8127 || (sec->flags & SEC_ALLOC) == 0
8128 || (sec->flags & SEC_DEBUGGING) != 0)
8129 continue;
8130
8131 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8132 info->keep_memory);
8133 if (relstart == NULL)
8134 goto error_ret;
8135
8136 /* Mark toc entries referenced as used. */
8137 repeat = 0;
8138 do
8139 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8140 {
8141 enum elf_ppc64_reloc_type r_type;
8142 unsigned long r_symndx;
8143 asection *sym_sec;
8144 struct elf_link_hash_entry *h;
8145 Elf_Internal_Sym *sym;
8146 bfd_vma val;
8147
8148 r_type = ELF64_R_TYPE (rel->r_info);
8149 switch (r_type)
8150 {
8151 case R_PPC64_TOC16:
8152 case R_PPC64_TOC16_LO:
8153 case R_PPC64_TOC16_HI:
8154 case R_PPC64_TOC16_HA:
8155 case R_PPC64_TOC16_DS:
8156 case R_PPC64_TOC16_LO_DS:
8157 /* In case we're taking addresses of toc entries. */
8158 case R_PPC64_ADDR64:
8159 break;
8160
8161 default:
8162 continue;
8163 }
8164
8165 r_symndx = ELF64_R_SYM (rel->r_info);
8166 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8167 r_symndx, ibfd))
8168 {
8169 free (used);
8170 goto error_ret;
8171 }
8172
8173 if (sym_sec != toc)
8174 continue;
8175
8176 if (h != NULL)
8177 val = h->root.u.def.value;
8178 else
8179 val = sym->st_value;
8180 val += rel->r_addend;
8181
8182 if (val >= toc->size)
8183 continue;
8184
8185 if ((skip[val >> 3] & can_optimize) != 0)
8186 {
8187 bfd_vma off;
8188 unsigned char opc;
8189
8190 switch (r_type)
8191 {
8192 case R_PPC64_TOC16_HA:
8193 break;
8194
8195 case R_PPC64_TOC16_LO_DS:
8196 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8197 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8198 return FALSE;
8199 if ((opc & (0x3f << 2)) == (58u << 2))
8200 break;
8201 /* Fall thru */
8202
8203 default:
8204 /* Wrong sort of reloc, or not a ld. We may
8205 as well clear ref_from_discarded too. */
8206 skip[val >> 3] = 0;
8207 }
8208 }
8209
8210 /* For the toc section, we only mark as used if
8211 this entry itself isn't unused. */
8212 if (sec == toc
8213 && !used[val >> 3]
8214 && (used[rel->r_offset >> 3]
8215 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8216 /* Do all the relocs again, to catch reference
8217 chains. */
8218 repeat = 1;
8219
8220 used[val >> 3] = 1;
8221 }
8222 while (repeat);
8223
8224 if (elf_section_data (sec)->relocs != relstart)
8225 free (relstart);
8226 }
8227
8228 /* Merge the used and skip arrays. Assume that TOC
8229 doublewords not appearing as either used or unused belong
8230 to to an entry more than one doubleword in size. */
8231 for (drop = skip, keep = used, last = 0, some_unused = 0;
8232 drop < skip + (toc->size + 7) / 8;
8233 ++drop, ++keep)
8234 {
8235 if (*keep)
8236 {
8237 *drop &= ~ref_from_discarded;
8238 if ((*drop & can_optimize) != 0)
8239 some_unused = 1;
8240 last = 0;
8241 }
8242 else if (*drop)
8243 {
8244 some_unused = 1;
8245 last = ref_from_discarded;
8246 }
8247 else
8248 *drop = last;
8249 }
8250
8251 free (used);
8252
8253 if (some_unused)
8254 {
8255 bfd_byte *contents, *src;
8256 unsigned long off;
8257 Elf_Internal_Sym *sym;
8258 bfd_boolean local_toc_syms = FALSE;
8259
8260 /* Shuffle the toc contents, and at the same time convert the
8261 skip array from booleans into offsets. */
8262 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8263 goto error_ret;
8264
8265 elf_section_data (toc)->this_hdr.contents = contents;
8266
8267 for (src = contents, off = 0, drop = skip;
8268 src < contents + toc->size;
8269 src += 8, ++drop)
8270 {
8271 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8272 off += 8;
8273 else if (off != 0)
8274 {
8275 *drop = off;
8276 memcpy (src - off, src, 8);
8277 }
8278 }
8279 *drop = off;
8280 toc->rawsize = toc->size;
8281 toc->size = src - contents - off;
8282
8283 /* Adjust addends for relocs against the toc section sym,
8284 and optimize any accesses we can. */
8285 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8286 {
8287 if (sec->reloc_count == 0
8288 || elf_discarded_section (sec))
8289 continue;
8290
8291 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8292 info->keep_memory);
8293 if (relstart == NULL)
8294 goto error_ret;
8295
8296 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8297 {
8298 enum elf_ppc64_reloc_type r_type;
8299 unsigned long r_symndx;
8300 asection *sym_sec;
8301 struct elf_link_hash_entry *h;
8302 bfd_vma val;
8303
8304 r_type = ELF64_R_TYPE (rel->r_info);
8305 switch (r_type)
8306 {
8307 default:
8308 continue;
8309
8310 case R_PPC64_TOC16:
8311 case R_PPC64_TOC16_LO:
8312 case R_PPC64_TOC16_HI:
8313 case R_PPC64_TOC16_HA:
8314 case R_PPC64_TOC16_DS:
8315 case R_PPC64_TOC16_LO_DS:
8316 case R_PPC64_ADDR64:
8317 break;
8318 }
8319
8320 r_symndx = ELF64_R_SYM (rel->r_info);
8321 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8322 r_symndx, ibfd))
8323 goto error_ret;
8324
8325 if (sym_sec != toc)
8326 continue;
8327
8328 if (h != NULL)
8329 val = h->root.u.def.value;
8330 else
8331 {
8332 val = sym->st_value;
8333 if (val != 0)
8334 local_toc_syms = TRUE;
8335 }
8336
8337 val += rel->r_addend;
8338
8339 if (val > toc->rawsize)
8340 val = toc->rawsize;
8341 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8342 continue;
8343 else if ((skip[val >> 3] & can_optimize) != 0)
8344 {
8345 Elf_Internal_Rela *tocrel
8346 = toc_relocs + (skip[val >> 3] >> 2);
8347 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8348
8349 switch (r_type)
8350 {
8351 case R_PPC64_TOC16_HA:
8352 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8353 break;
8354
8355 case R_PPC64_TOC16_LO_DS:
8356 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8357 break;
8358
8359 default:
8360 abort ();
8361 }
8362 rel->r_addend = tocrel->r_addend;
8363 elf_section_data (sec)->relocs = relstart;
8364 continue;
8365 }
8366
8367 if (h != NULL || sym->st_value != 0)
8368 continue;
8369
8370 rel->r_addend -= skip[val >> 3];
8371 elf_section_data (sec)->relocs = relstart;
8372 }
8373
8374 if (elf_section_data (sec)->relocs != relstart)
8375 free (relstart);
8376 }
8377
8378 /* We shouldn't have local or global symbols defined in the TOC,
8379 but handle them anyway. */
8380 if (local_syms != NULL)
8381 for (sym = local_syms;
8382 sym < local_syms + symtab_hdr->sh_info;
8383 ++sym)
8384 if (sym->st_value != 0
8385 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8386 {
8387 unsigned long i;
8388
8389 if (sym->st_value > toc->rawsize)
8390 i = toc->rawsize >> 3;
8391 else
8392 i = sym->st_value >> 3;
8393
8394 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8395 {
8396 if (local_toc_syms)
8397 (*_bfd_error_handler)
8398 (_("%s defined on removed toc entry"),
8399 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8400 do
8401 ++i;
8402 while ((skip[i] & (ref_from_discarded | can_optimize)));
8403 sym->st_value = (bfd_vma) i << 3;
8404 }
8405
8406 sym->st_value -= skip[i];
8407 symtab_hdr->contents = (unsigned char *) local_syms;
8408 }
8409
8410 /* Adjust any global syms defined in this toc input section. */
8411 if (toc_inf.global_toc_syms)
8412 {
8413 toc_inf.toc = toc;
8414 toc_inf.skip = skip;
8415 toc_inf.global_toc_syms = FALSE;
8416 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8417 &toc_inf);
8418 }
8419
8420 if (toc->reloc_count != 0)
8421 {
8422 Elf_Internal_Shdr *rel_hdr;
8423 Elf_Internal_Rela *wrel;
8424 bfd_size_type sz;
8425
8426 /* Remove unused toc relocs, and adjust those we keep. */
8427 if (toc_relocs == NULL)
8428 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8429 info->keep_memory);
8430 if (toc_relocs == NULL)
8431 goto error_ret;
8432
8433 wrel = toc_relocs;
8434 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8435 if ((skip[rel->r_offset >> 3]
8436 & (ref_from_discarded | can_optimize)) == 0)
8437 {
8438 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8439 wrel->r_info = rel->r_info;
8440 wrel->r_addend = rel->r_addend;
8441 ++wrel;
8442 }
8443 else if (!dec_dynrel_count (rel->r_info, toc, info,
8444 &local_syms, NULL, NULL))
8445 goto error_ret;
8446
8447 elf_section_data (toc)->relocs = toc_relocs;
8448 toc->reloc_count = wrel - toc_relocs;
8449 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8450 sz = rel_hdr->sh_entsize;
8451 rel_hdr->sh_size = toc->reloc_count * sz;
8452 }
8453 }
8454 else if (toc_relocs != NULL
8455 && elf_section_data (toc)->relocs != toc_relocs)
8456 free (toc_relocs);
8457
8458 if (local_syms != NULL
8459 && symtab_hdr->contents != (unsigned char *) local_syms)
8460 {
8461 if (!info->keep_memory)
8462 free (local_syms);
8463 else
8464 symtab_hdr->contents = (unsigned char *) local_syms;
8465 }
8466 free (skip);
8467 }
8468
8469 return TRUE;
8470 }
8471
8472 /* Return true iff input section I references the TOC using
8473 instructions limited to +/-32k offsets. */
8474
8475 bfd_boolean
8476 ppc64_elf_has_small_toc_reloc (asection *i)
8477 {
8478 return (is_ppc64_elf (i->owner)
8479 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8480 }
8481
8482 /* Allocate space for one GOT entry. */
8483
8484 static void
8485 allocate_got (struct elf_link_hash_entry *h,
8486 struct bfd_link_info *info,
8487 struct got_entry *gent)
8488 {
8489 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8490 bfd_boolean dyn;
8491 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8492 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8493 ? 16 : 8);
8494 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8495 ? 2 : 1) * sizeof (Elf64_External_Rela);
8496 asection *got = ppc64_elf_tdata (gent->owner)->got;
8497
8498 gent->got.offset = got->size;
8499 got->size += entsize;
8500
8501 dyn = htab->elf.dynamic_sections_created;
8502 if ((info->shared
8503 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8504 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8505 || h->root.type != bfd_link_hash_undefweak))
8506 {
8507 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8508 relgot->size += rentsize;
8509 }
8510 else if (h->type == STT_GNU_IFUNC)
8511 {
8512 asection *relgot = htab->reliplt;
8513 relgot->size += rentsize;
8514 htab->got_reli_size += rentsize;
8515 }
8516 }
8517
8518 /* This function merges got entries in the same toc group. */
8519
8520 static void
8521 merge_got_entries (struct got_entry **pent)
8522 {
8523 struct got_entry *ent, *ent2;
8524
8525 for (ent = *pent; ent != NULL; ent = ent->next)
8526 if (!ent->is_indirect)
8527 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8528 if (!ent2->is_indirect
8529 && ent2->addend == ent->addend
8530 && ent2->tls_type == ent->tls_type
8531 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8532 {
8533 ent2->is_indirect = TRUE;
8534 ent2->got.ent = ent;
8535 }
8536 }
8537
8538 /* Allocate space in .plt, .got and associated reloc sections for
8539 dynamic relocs. */
8540
8541 static bfd_boolean
8542 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8543 {
8544 struct bfd_link_info *info;
8545 struct ppc_link_hash_table *htab;
8546 asection *s;
8547 struct ppc_link_hash_entry *eh;
8548 struct ppc_dyn_relocs *p;
8549 struct got_entry **pgent, *gent;
8550
8551 if (h->root.type == bfd_link_hash_indirect)
8552 return TRUE;
8553
8554 if (h->root.type == bfd_link_hash_warning)
8555 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8556
8557 info = (struct bfd_link_info *) inf;
8558 htab = ppc_hash_table (info);
8559 if (htab == NULL)
8560 return FALSE;
8561
8562 if ((htab->elf.dynamic_sections_created
8563 && h->dynindx != -1
8564 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8565 || h->type == STT_GNU_IFUNC)
8566 {
8567 struct plt_entry *pent;
8568 bfd_boolean doneone = FALSE;
8569 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8570 if (pent->plt.refcount > 0)
8571 {
8572 if (!htab->elf.dynamic_sections_created
8573 || h->dynindx == -1)
8574 {
8575 s = htab->iplt;
8576 pent->plt.offset = s->size;
8577 s->size += PLT_ENTRY_SIZE;
8578 s = htab->reliplt;
8579 }
8580 else
8581 {
8582 /* If this is the first .plt entry, make room for the special
8583 first entry. */
8584 s = htab->plt;
8585 if (s->size == 0)
8586 s->size += PLT_INITIAL_ENTRY_SIZE;
8587
8588 pent->plt.offset = s->size;
8589
8590 /* Make room for this entry. */
8591 s->size += PLT_ENTRY_SIZE;
8592
8593 /* Make room for the .glink code. */
8594 s = htab->glink;
8595 if (s->size == 0)
8596 s->size += GLINK_CALL_STUB_SIZE;
8597 /* We need bigger stubs past index 32767. */
8598 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8599 s->size += 4;
8600 s->size += 2*4;
8601
8602 /* We also need to make an entry in the .rela.plt section. */
8603 s = htab->relplt;
8604 }
8605 s->size += sizeof (Elf64_External_Rela);
8606 doneone = TRUE;
8607 }
8608 else
8609 pent->plt.offset = (bfd_vma) -1;
8610 if (!doneone)
8611 {
8612 h->plt.plist = NULL;
8613 h->needs_plt = 0;
8614 }
8615 }
8616 else
8617 {
8618 h->plt.plist = NULL;
8619 h->needs_plt = 0;
8620 }
8621
8622 eh = (struct ppc_link_hash_entry *) h;
8623 /* Run through the TLS GD got entries first if we're changing them
8624 to TPREL. */
8625 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8626 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8627 if (gent->got.refcount > 0
8628 && (gent->tls_type & TLS_GD) != 0)
8629 {
8630 /* This was a GD entry that has been converted to TPREL. If
8631 there happens to be a TPREL entry we can use that one. */
8632 struct got_entry *ent;
8633 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8634 if (ent->got.refcount > 0
8635 && (ent->tls_type & TLS_TPREL) != 0
8636 && ent->addend == gent->addend
8637 && ent->owner == gent->owner)
8638 {
8639 gent->got.refcount = 0;
8640 break;
8641 }
8642
8643 /* If not, then we'll be using our own TPREL entry. */
8644 if (gent->got.refcount != 0)
8645 gent->tls_type = TLS_TLS | TLS_TPREL;
8646 }
8647
8648 /* Remove any list entry that won't generate a word in the GOT before
8649 we call merge_got_entries. Otherwise we risk merging to empty
8650 entries. */
8651 pgent = &h->got.glist;
8652 while ((gent = *pgent) != NULL)
8653 if (gent->got.refcount > 0)
8654 {
8655 if ((gent->tls_type & TLS_LD) != 0
8656 && !h->def_dynamic)
8657 {
8658 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8659 *pgent = gent->next;
8660 }
8661 else
8662 pgent = &gent->next;
8663 }
8664 else
8665 *pgent = gent->next;
8666
8667 if (!htab->do_multi_toc)
8668 merge_got_entries (&h->got.glist);
8669
8670 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8671 if (!gent->is_indirect)
8672 {
8673 /* Make sure this symbol is output as a dynamic symbol.
8674 Undefined weak syms won't yet be marked as dynamic,
8675 nor will all TLS symbols. */
8676 if (h->dynindx == -1
8677 && !h->forced_local
8678 && h->type != STT_GNU_IFUNC
8679 && htab->elf.dynamic_sections_created)
8680 {
8681 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8682 return FALSE;
8683 }
8684
8685 if (!is_ppc64_elf (gent->owner))
8686 abort ();
8687
8688 allocate_got (h, info, gent);
8689 }
8690
8691 if (eh->dyn_relocs == NULL
8692 || (!htab->elf.dynamic_sections_created
8693 && h->type != STT_GNU_IFUNC))
8694 return TRUE;
8695
8696 /* In the shared -Bsymbolic case, discard space allocated for
8697 dynamic pc-relative relocs against symbols which turn out to be
8698 defined in regular objects. For the normal shared case, discard
8699 space for relocs that have become local due to symbol visibility
8700 changes. */
8701
8702 if (info->shared)
8703 {
8704 /* Relocs that use pc_count are those that appear on a call insn,
8705 or certain REL relocs (see must_be_dyn_reloc) that can be
8706 generated via assembly. We want calls to protected symbols to
8707 resolve directly to the function rather than going via the plt.
8708 If people want function pointer comparisons to work as expected
8709 then they should avoid writing weird assembly. */
8710 if (SYMBOL_CALLS_LOCAL (info, h))
8711 {
8712 struct ppc_dyn_relocs **pp;
8713
8714 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8715 {
8716 p->count -= p->pc_count;
8717 p->pc_count = 0;
8718 if (p->count == 0)
8719 *pp = p->next;
8720 else
8721 pp = &p->next;
8722 }
8723 }
8724
8725 /* Also discard relocs on undefined weak syms with non-default
8726 visibility. */
8727 if (eh->dyn_relocs != NULL
8728 && h->root.type == bfd_link_hash_undefweak)
8729 {
8730 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8731 eh->dyn_relocs = NULL;
8732
8733 /* Make sure this symbol is output as a dynamic symbol.
8734 Undefined weak syms won't yet be marked as dynamic. */
8735 else if (h->dynindx == -1
8736 && !h->forced_local)
8737 {
8738 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8739 return FALSE;
8740 }
8741 }
8742 }
8743 else if (h->type == STT_GNU_IFUNC)
8744 {
8745 if (!h->non_got_ref)
8746 eh->dyn_relocs = NULL;
8747 }
8748 else if (ELIMINATE_COPY_RELOCS)
8749 {
8750 /* For the non-shared case, discard space for relocs against
8751 symbols which turn out to need copy relocs or are not
8752 dynamic. */
8753
8754 if (!h->non_got_ref
8755 && !h->def_regular)
8756 {
8757 /* Make sure this symbol is output as a dynamic symbol.
8758 Undefined weak syms won't yet be marked as dynamic. */
8759 if (h->dynindx == -1
8760 && !h->forced_local)
8761 {
8762 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8763 return FALSE;
8764 }
8765
8766 /* If that succeeded, we know we'll be keeping all the
8767 relocs. */
8768 if (h->dynindx != -1)
8769 goto keep;
8770 }
8771
8772 eh->dyn_relocs = NULL;
8773
8774 keep: ;
8775 }
8776
8777 /* Finally, allocate space. */
8778 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8779 {
8780 asection *sreloc = elf_section_data (p->sec)->sreloc;
8781 if (!htab->elf.dynamic_sections_created)
8782 sreloc = htab->reliplt;
8783 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8784 }
8785
8786 return TRUE;
8787 }
8788
8789 /* Find any dynamic relocs that apply to read-only sections. */
8790
8791 static bfd_boolean
8792 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8793 {
8794 struct ppc_link_hash_entry *eh;
8795 struct ppc_dyn_relocs *p;
8796
8797 if (h->root.type == bfd_link_hash_warning)
8798 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8799
8800 eh = (struct ppc_link_hash_entry *) h;
8801 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8802 {
8803 asection *s = p->sec->output_section;
8804
8805 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8806 {
8807 struct bfd_link_info *info = inf;
8808
8809 info->flags |= DF_TEXTREL;
8810
8811 /* Not an error, just cut short the traversal. */
8812 return FALSE;
8813 }
8814 }
8815 return TRUE;
8816 }
8817
8818 /* Set the sizes of the dynamic sections. */
8819
8820 static bfd_boolean
8821 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8822 struct bfd_link_info *info)
8823 {
8824 struct ppc_link_hash_table *htab;
8825 bfd *dynobj;
8826 asection *s;
8827 bfd_boolean relocs;
8828 bfd *ibfd;
8829 struct got_entry *first_tlsld;
8830
8831 htab = ppc_hash_table (info);
8832 if (htab == NULL)
8833 return FALSE;
8834
8835 dynobj = htab->elf.dynobj;
8836 if (dynobj == NULL)
8837 abort ();
8838
8839 if (htab->elf.dynamic_sections_created)
8840 {
8841 /* Set the contents of the .interp section to the interpreter. */
8842 if (info->executable)
8843 {
8844 s = bfd_get_section_by_name (dynobj, ".interp");
8845 if (s == NULL)
8846 abort ();
8847 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8848 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8849 }
8850 }
8851
8852 /* Set up .got offsets for local syms, and space for local dynamic
8853 relocs. */
8854 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8855 {
8856 struct got_entry **lgot_ents;
8857 struct got_entry **end_lgot_ents;
8858 struct plt_entry **local_plt;
8859 struct plt_entry **end_local_plt;
8860 unsigned char *lgot_masks;
8861 bfd_size_type locsymcount;
8862 Elf_Internal_Shdr *symtab_hdr;
8863 asection *srel;
8864
8865 if (!is_ppc64_elf (ibfd))
8866 continue;
8867
8868 for (s = ibfd->sections; s != NULL; s = s->next)
8869 {
8870 struct ppc_dyn_relocs *p;
8871
8872 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8873 {
8874 if (!bfd_is_abs_section (p->sec)
8875 && bfd_is_abs_section (p->sec->output_section))
8876 {
8877 /* Input section has been discarded, either because
8878 it is a copy of a linkonce section or due to
8879 linker script /DISCARD/, so we'll be discarding
8880 the relocs too. */
8881 }
8882 else if (p->count != 0)
8883 {
8884 srel = elf_section_data (p->sec)->sreloc;
8885 if (!htab->elf.dynamic_sections_created)
8886 srel = htab->reliplt;
8887 srel->size += p->count * sizeof (Elf64_External_Rela);
8888 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8889 info->flags |= DF_TEXTREL;
8890 }
8891 }
8892 }
8893
8894 lgot_ents = elf_local_got_ents (ibfd);
8895 if (!lgot_ents)
8896 continue;
8897
8898 symtab_hdr = &elf_symtab_hdr (ibfd);
8899 locsymcount = symtab_hdr->sh_info;
8900 end_lgot_ents = lgot_ents + locsymcount;
8901 local_plt = (struct plt_entry **) end_lgot_ents;
8902 end_local_plt = local_plt + locsymcount;
8903 lgot_masks = (unsigned char *) end_local_plt;
8904 s = ppc64_elf_tdata (ibfd)->got;
8905 srel = ppc64_elf_tdata (ibfd)->relgot;
8906 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8907 {
8908 struct got_entry **pent, *ent;
8909
8910 pent = lgot_ents;
8911 while ((ent = *pent) != NULL)
8912 if (ent->got.refcount > 0)
8913 {
8914 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8915 {
8916 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8917 *pent = ent->next;
8918 }
8919 else
8920 {
8921 unsigned int num = 1;
8922 ent->got.offset = s->size;
8923 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8924 num = 2;
8925 s->size += num * 8;
8926 if (info->shared)
8927 srel->size += num * sizeof (Elf64_External_Rela);
8928 else if ((*lgot_masks & PLT_IFUNC) != 0)
8929 {
8930 htab->reliplt->size
8931 += num * sizeof (Elf64_External_Rela);
8932 htab->got_reli_size
8933 += num * sizeof (Elf64_External_Rela);
8934 }
8935 pent = &ent->next;
8936 }
8937 }
8938 else
8939 *pent = ent->next;
8940 }
8941
8942 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8943 for (; local_plt < end_local_plt; ++local_plt)
8944 {
8945 struct plt_entry *ent;
8946
8947 for (ent = *local_plt; ent != NULL; ent = ent->next)
8948 if (ent->plt.refcount > 0)
8949 {
8950 s = htab->iplt;
8951 ent->plt.offset = s->size;
8952 s->size += PLT_ENTRY_SIZE;
8953
8954 htab->reliplt->size += sizeof (Elf64_External_Rela);
8955 }
8956 else
8957 ent->plt.offset = (bfd_vma) -1;
8958 }
8959 }
8960
8961 /* Allocate global sym .plt and .got entries, and space for global
8962 sym dynamic relocs. */
8963 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8964
8965 first_tlsld = NULL;
8966 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8967 {
8968 struct got_entry *ent;
8969
8970 if (!is_ppc64_elf (ibfd))
8971 continue;
8972
8973 ent = ppc64_tlsld_got (ibfd);
8974 if (ent->got.refcount > 0)
8975 {
8976 if (!htab->do_multi_toc && first_tlsld != NULL)
8977 {
8978 ent->is_indirect = TRUE;
8979 ent->got.ent = first_tlsld;
8980 }
8981 else
8982 {
8983 if (first_tlsld == NULL)
8984 first_tlsld = ent;
8985 s = ppc64_elf_tdata (ibfd)->got;
8986 ent->got.offset = s->size;
8987 ent->owner = ibfd;
8988 s->size += 16;
8989 if (info->shared)
8990 {
8991 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8992 srel->size += sizeof (Elf64_External_Rela);
8993 }
8994 }
8995 }
8996 else
8997 ent->got.offset = (bfd_vma) -1;
8998 }
8999
9000 /* We now have determined the sizes of the various dynamic sections.
9001 Allocate memory for them. */
9002 relocs = FALSE;
9003 for (s = dynobj->sections; s != NULL; s = s->next)
9004 {
9005 if ((s->flags & SEC_LINKER_CREATED) == 0)
9006 continue;
9007
9008 if (s == htab->brlt || s == htab->relbrlt)
9009 /* These haven't been allocated yet; don't strip. */
9010 continue;
9011 else if (s == htab->got
9012 || s == htab->plt
9013 || s == htab->iplt
9014 || s == htab->glink
9015 || s == htab->dynbss)
9016 {
9017 /* Strip this section if we don't need it; see the
9018 comment below. */
9019 }
9020 else if (CONST_STRNEQ (s->name, ".rela"))
9021 {
9022 if (s->size != 0)
9023 {
9024 if (s != htab->relplt)
9025 relocs = TRUE;
9026
9027 /* We use the reloc_count field as a counter if we need
9028 to copy relocs into the output file. */
9029 s->reloc_count = 0;
9030 }
9031 }
9032 else
9033 {
9034 /* It's not one of our sections, so don't allocate space. */
9035 continue;
9036 }
9037
9038 if (s->size == 0)
9039 {
9040 /* If we don't need this section, strip it from the
9041 output file. This is mostly to handle .rela.bss and
9042 .rela.plt. We must create both sections in
9043 create_dynamic_sections, because they must be created
9044 before the linker maps input sections to output
9045 sections. The linker does that before
9046 adjust_dynamic_symbol is called, and it is that
9047 function which decides whether anything needs to go
9048 into these sections. */
9049 s->flags |= SEC_EXCLUDE;
9050 continue;
9051 }
9052
9053 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9054 continue;
9055
9056 /* Allocate memory for the section contents. We use bfd_zalloc
9057 here in case unused entries are not reclaimed before the
9058 section's contents are written out. This should not happen,
9059 but this way if it does we get a R_PPC64_NONE reloc in .rela
9060 sections instead of garbage.
9061 We also rely on the section contents being zero when writing
9062 the GOT. */
9063 s->contents = bfd_zalloc (dynobj, s->size);
9064 if (s->contents == NULL)
9065 return FALSE;
9066 }
9067
9068 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9069 {
9070 if (!is_ppc64_elf (ibfd))
9071 continue;
9072
9073 s = ppc64_elf_tdata (ibfd)->got;
9074 if (s != NULL && s != htab->got)
9075 {
9076 if (s->size == 0)
9077 s->flags |= SEC_EXCLUDE;
9078 else
9079 {
9080 s->contents = bfd_zalloc (ibfd, s->size);
9081 if (s->contents == NULL)
9082 return FALSE;
9083 }
9084 }
9085 s = ppc64_elf_tdata (ibfd)->relgot;
9086 if (s != NULL)
9087 {
9088 if (s->size == 0)
9089 s->flags |= SEC_EXCLUDE;
9090 else
9091 {
9092 s->contents = bfd_zalloc (ibfd, s->size);
9093 if (s->contents == NULL)
9094 return FALSE;
9095 relocs = TRUE;
9096 s->reloc_count = 0;
9097 }
9098 }
9099 }
9100
9101 if (htab->elf.dynamic_sections_created)
9102 {
9103 /* Add some entries to the .dynamic section. We fill in the
9104 values later, in ppc64_elf_finish_dynamic_sections, but we
9105 must add the entries now so that we get the correct size for
9106 the .dynamic section. The DT_DEBUG entry is filled in by the
9107 dynamic linker and used by the debugger. */
9108 #define add_dynamic_entry(TAG, VAL) \
9109 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9110
9111 if (info->executable)
9112 {
9113 if (!add_dynamic_entry (DT_DEBUG, 0))
9114 return FALSE;
9115 }
9116
9117 if (htab->plt != NULL && htab->plt->size != 0)
9118 {
9119 if (!add_dynamic_entry (DT_PLTGOT, 0)
9120 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9121 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9122 || !add_dynamic_entry (DT_JMPREL, 0)
9123 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9124 return FALSE;
9125 }
9126
9127 if (NO_OPD_RELOCS)
9128 {
9129 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9130 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9131 return FALSE;
9132 }
9133
9134 if (!htab->no_tls_get_addr_opt
9135 && htab->tls_get_addr_fd != NULL
9136 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9137 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9138 return FALSE;
9139
9140 if (relocs)
9141 {
9142 if (!add_dynamic_entry (DT_RELA, 0)
9143 || !add_dynamic_entry (DT_RELASZ, 0)
9144 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9145 return FALSE;
9146
9147 /* If any dynamic relocs apply to a read-only section,
9148 then we need a DT_TEXTREL entry. */
9149 if ((info->flags & DF_TEXTREL) == 0)
9150 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9151
9152 if ((info->flags & DF_TEXTREL) != 0)
9153 {
9154 if (!add_dynamic_entry (DT_TEXTREL, 0))
9155 return FALSE;
9156 }
9157 }
9158 }
9159 #undef add_dynamic_entry
9160
9161 return TRUE;
9162 }
9163
9164 /* Determine the type of stub needed, if any, for a call. */
9165
9166 static inline enum ppc_stub_type
9167 ppc_type_of_stub (asection *input_sec,
9168 const Elf_Internal_Rela *rel,
9169 struct ppc_link_hash_entry **hash,
9170 struct plt_entry **plt_ent,
9171 bfd_vma destination)
9172 {
9173 struct ppc_link_hash_entry *h = *hash;
9174 bfd_vma location;
9175 bfd_vma branch_offset;
9176 bfd_vma max_branch_offset;
9177 enum elf_ppc64_reloc_type r_type;
9178
9179 if (h != NULL)
9180 {
9181 struct plt_entry *ent;
9182 struct ppc_link_hash_entry *fdh = h;
9183 if (h->oh != NULL
9184 && h->oh->is_func_descriptor)
9185 {
9186 fdh = ppc_follow_link (h->oh);
9187 *hash = fdh;
9188 }
9189
9190 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9191 if (ent->addend == rel->r_addend
9192 && ent->plt.offset != (bfd_vma) -1)
9193 {
9194 *plt_ent = ent;
9195 return ppc_stub_plt_call;
9196 }
9197
9198 /* Here, we know we don't have a plt entry. If we don't have a
9199 either a defined function descriptor or a defined entry symbol
9200 in a regular object file, then it is pointless trying to make
9201 any other type of stub. */
9202 if (!is_static_defined (&fdh->elf)
9203 && !is_static_defined (&h->elf))
9204 return ppc_stub_none;
9205 }
9206 else if (elf_local_got_ents (input_sec->owner) != NULL)
9207 {
9208 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9209 struct plt_entry **local_plt = (struct plt_entry **)
9210 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9211 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9212
9213 if (local_plt[r_symndx] != NULL)
9214 {
9215 struct plt_entry *ent;
9216
9217 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9218 if (ent->addend == rel->r_addend
9219 && ent->plt.offset != (bfd_vma) -1)
9220 {
9221 *plt_ent = ent;
9222 return ppc_stub_plt_call;
9223 }
9224 }
9225 }
9226
9227 /* Determine where the call point is. */
9228 location = (input_sec->output_offset
9229 + input_sec->output_section->vma
9230 + rel->r_offset);
9231
9232 branch_offset = destination - location;
9233 r_type = ELF64_R_TYPE (rel->r_info);
9234
9235 /* Determine if a long branch stub is needed. */
9236 max_branch_offset = 1 << 25;
9237 if (r_type != R_PPC64_REL24)
9238 max_branch_offset = 1 << 15;
9239
9240 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9241 /* We need a stub. Figure out whether a long_branch or plt_branch
9242 is needed later. */
9243 return ppc_stub_long_branch;
9244
9245 return ppc_stub_none;
9246 }
9247
9248 /* Build a .plt call stub. */
9249
9250 static inline bfd_byte *
9251 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
9252 {
9253 #define PPC_LO(v) ((v) & 0xffff)
9254 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9255 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9256
9257 if (PPC_HA (offset) != 0)
9258 {
9259 if (r != NULL)
9260 {
9261 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9262 r[1].r_offset = r[0].r_offset + 8;
9263 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9264 r[1].r_addend = r[0].r_addend;
9265 if (PPC_HA (offset + 16) != PPC_HA (offset))
9266 {
9267 r[2].r_offset = r[1].r_offset + 4;
9268 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9269 r[2].r_addend = r[0].r_addend;
9270 }
9271 else
9272 {
9273 r[2].r_offset = r[1].r_offset + 8;
9274 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9275 r[2].r_addend = r[0].r_addend + 8;
9276 r[3].r_offset = r[2].r_offset + 4;
9277 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9278 r[3].r_addend = r[0].r_addend + 16;
9279 }
9280 }
9281 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9282 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9283 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9284 if (PPC_HA (offset + 16) != PPC_HA (offset))
9285 {
9286 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9287 offset = 0;
9288 }
9289 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9290 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9291 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9292 bfd_put_32 (obfd, BCTR, p), p += 4;
9293 }
9294 else
9295 {
9296 if (r != NULL)
9297 {
9298 r[0].r_offset += 4;
9299 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9300 if (PPC_HA (offset + 16) != PPC_HA (offset))
9301 {
9302 r[1].r_offset = r[0].r_offset + 4;
9303 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9304 r[1].r_addend = r[0].r_addend;
9305 }
9306 else
9307 {
9308 r[1].r_offset = r[0].r_offset + 8;
9309 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9310 r[1].r_addend = r[0].r_addend + 16;
9311 r[2].r_offset = r[1].r_offset + 4;
9312 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9313 r[2].r_addend = r[0].r_addend + 8;
9314 }
9315 }
9316 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9317 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9318 if (PPC_HA (offset + 16) != PPC_HA (offset))
9319 {
9320 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9321 offset = 0;
9322 }
9323 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9324 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9325 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9326 bfd_put_32 (obfd, BCTR, p), p += 4;
9327 }
9328 return p;
9329 }
9330
9331 /* Build a special .plt call stub for __tls_get_addr. */
9332
9333 #define LD_R11_0R3 0xe9630000
9334 #define LD_R12_0R3 0xe9830000
9335 #define MR_R0_R3 0x7c601b78
9336 #define CMPDI_R11_0 0x2c2b0000
9337 #define ADD_R3_R12_R13 0x7c6c6a14
9338 #define BEQLR 0x4d820020
9339 #define MR_R3_R0 0x7c030378
9340 #define MFLR_R11 0x7d6802a6
9341 #define STD_R11_0R1 0xf9610000
9342 #define BCTRL 0x4e800421
9343 #define LD_R11_0R1 0xe9610000
9344 #define LD_R2_0R1 0xe8410000
9345 #define MTLR_R11 0x7d6803a6
9346
9347 static inline bfd_byte *
9348 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9349 Elf_Internal_Rela *r)
9350 {
9351 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9352 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9353 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9354 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9355 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9356 bfd_put_32 (obfd, BEQLR, p), p += 4;
9357 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9358 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9359 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9360
9361 if (r != NULL)
9362 r[0].r_offset += 9 * 4;
9363 p = build_plt_stub (obfd, p, offset, r);
9364 bfd_put_32 (obfd, BCTRL, p - 4);
9365
9366 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9367 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9368 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9369 bfd_put_32 (obfd, BLR, p), p += 4;
9370
9371 return p;
9372 }
9373
9374 static Elf_Internal_Rela *
9375 get_relocs (asection *sec, int count)
9376 {
9377 Elf_Internal_Rela *relocs;
9378 struct bfd_elf_section_data *elfsec_data;
9379
9380 elfsec_data = elf_section_data (sec);
9381 relocs = elfsec_data->relocs;
9382 if (relocs == NULL)
9383 {
9384 bfd_size_type relsize;
9385 relsize = sec->reloc_count * sizeof (*relocs);
9386 relocs = bfd_alloc (sec->owner, relsize);
9387 if (relocs == NULL)
9388 return NULL;
9389 elfsec_data->relocs = relocs;
9390 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9391 sizeof (Elf_Internal_Shdr));
9392 if (elfsec_data->rela.hdr == NULL)
9393 return NULL;
9394 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9395 * sizeof (Elf64_External_Rela));
9396 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9397 sec->reloc_count = 0;
9398 }
9399 relocs += sec->reloc_count;
9400 sec->reloc_count += count;
9401 return relocs;
9402 }
9403
9404 static bfd_boolean
9405 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9406 {
9407 struct ppc_stub_hash_entry *stub_entry;
9408 struct ppc_branch_hash_entry *br_entry;
9409 struct bfd_link_info *info;
9410 struct ppc_link_hash_table *htab;
9411 bfd_byte *loc;
9412 bfd_byte *p;
9413 bfd_vma dest, off;
9414 int size;
9415 Elf_Internal_Rela *r;
9416 asection *plt;
9417
9418 /* Massage our args to the form they really have. */
9419 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9420 info = in_arg;
9421
9422 htab = ppc_hash_table (info);
9423 if (htab == NULL)
9424 return FALSE;
9425
9426 /* Make a note of the offset within the stubs for this entry. */
9427 stub_entry->stub_offset = stub_entry->stub_sec->size;
9428 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9429
9430 htab->stub_count[stub_entry->stub_type - 1] += 1;
9431 switch (stub_entry->stub_type)
9432 {
9433 case ppc_stub_long_branch:
9434 case ppc_stub_long_branch_r2off:
9435 /* Branches are relative. This is where we are going to. */
9436 off = dest = (stub_entry->target_value
9437 + stub_entry->target_section->output_offset
9438 + stub_entry->target_section->output_section->vma);
9439
9440 /* And this is where we are coming from. */
9441 off -= (stub_entry->stub_offset
9442 + stub_entry->stub_sec->output_offset
9443 + stub_entry->stub_sec->output_section->vma);
9444
9445 size = 4;
9446 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9447 {
9448 bfd_vma r2off;
9449
9450 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9451 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9452 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9453 loc += 4;
9454 size = 12;
9455 if (PPC_HA (r2off) != 0)
9456 {
9457 size = 16;
9458 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9459 loc += 4;
9460 }
9461 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9462 loc += 4;
9463 off -= size - 4;
9464 }
9465 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9466
9467 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9468 {
9469 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9470 stub_entry->root.string);
9471 htab->stub_error = TRUE;
9472 return FALSE;
9473 }
9474
9475 if (info->emitrelocations)
9476 {
9477 r = get_relocs (stub_entry->stub_sec, 1);
9478 if (r == NULL)
9479 return FALSE;
9480 r->r_offset = loc - stub_entry->stub_sec->contents;
9481 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9482 r->r_addend = dest;
9483 if (stub_entry->h != NULL)
9484 {
9485 struct elf_link_hash_entry **hashes;
9486 unsigned long symndx;
9487 struct ppc_link_hash_entry *h;
9488
9489 hashes = elf_sym_hashes (htab->stub_bfd);
9490 if (hashes == NULL)
9491 {
9492 bfd_size_type hsize;
9493
9494 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9495 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9496 if (hashes == NULL)
9497 return FALSE;
9498 elf_sym_hashes (htab->stub_bfd) = hashes;
9499 htab->stub_globals = 1;
9500 }
9501 symndx = htab->stub_globals++;
9502 h = stub_entry->h;
9503 hashes[symndx] = &h->elf;
9504 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9505 if (h->oh != NULL && h->oh->is_func)
9506 h = ppc_follow_link (h->oh);
9507 if (h->elf.root.u.def.section != stub_entry->target_section)
9508 /* H is an opd symbol. The addend must be zero. */
9509 r->r_addend = 0;
9510 else
9511 {
9512 off = (h->elf.root.u.def.value
9513 + h->elf.root.u.def.section->output_offset
9514 + h->elf.root.u.def.section->output_section->vma);
9515 r->r_addend -= off;
9516 }
9517 }
9518 }
9519 break;
9520
9521 case ppc_stub_plt_branch:
9522 case ppc_stub_plt_branch_r2off:
9523 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9524 stub_entry->root.string + 9,
9525 FALSE, FALSE);
9526 if (br_entry == NULL)
9527 {
9528 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9529 stub_entry->root.string);
9530 htab->stub_error = TRUE;
9531 return FALSE;
9532 }
9533
9534 dest = (stub_entry->target_value
9535 + stub_entry->target_section->output_offset
9536 + stub_entry->target_section->output_section->vma);
9537
9538 bfd_put_64 (htab->brlt->owner, dest,
9539 htab->brlt->contents + br_entry->offset);
9540
9541 if (br_entry->iter == htab->stub_iteration)
9542 {
9543 br_entry->iter = 0;
9544
9545 if (htab->relbrlt != NULL)
9546 {
9547 /* Create a reloc for the branch lookup table entry. */
9548 Elf_Internal_Rela rela;
9549 bfd_byte *rl;
9550
9551 rela.r_offset = (br_entry->offset
9552 + htab->brlt->output_offset
9553 + htab->brlt->output_section->vma);
9554 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9555 rela.r_addend = dest;
9556
9557 rl = htab->relbrlt->contents;
9558 rl += (htab->relbrlt->reloc_count++
9559 * sizeof (Elf64_External_Rela));
9560 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9561 }
9562 else if (info->emitrelocations)
9563 {
9564 r = get_relocs (htab->brlt, 1);
9565 if (r == NULL)
9566 return FALSE;
9567 /* brlt, being SEC_LINKER_CREATED does not go through the
9568 normal reloc processing. Symbols and offsets are not
9569 translated from input file to output file form, so
9570 set up the offset per the output file. */
9571 r->r_offset = (br_entry->offset
9572 + htab->brlt->output_offset
9573 + htab->brlt->output_section->vma);
9574 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9575 r->r_addend = dest;
9576 }
9577 }
9578
9579 dest = (br_entry->offset
9580 + htab->brlt->output_offset
9581 + htab->brlt->output_section->vma);
9582
9583 off = (dest
9584 - elf_gp (htab->brlt->output_section->owner)
9585 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9586
9587 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9588 {
9589 (*_bfd_error_handler)
9590 (_("linkage table error against `%s'"),
9591 stub_entry->root.string);
9592 bfd_set_error (bfd_error_bad_value);
9593 htab->stub_error = TRUE;
9594 return FALSE;
9595 }
9596
9597 if (info->emitrelocations)
9598 {
9599 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9600 if (r == NULL)
9601 return FALSE;
9602 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9603 if (bfd_big_endian (info->output_bfd))
9604 r[0].r_offset += 2;
9605 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9606 r[0].r_offset += 4;
9607 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9608 r[0].r_addend = dest;
9609 if (PPC_HA (off) != 0)
9610 {
9611 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9612 r[1].r_offset = r[0].r_offset + 4;
9613 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9614 r[1].r_addend = r[0].r_addend;
9615 }
9616 }
9617
9618 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9619 {
9620 if (PPC_HA (off) != 0)
9621 {
9622 size = 16;
9623 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9624 loc += 4;
9625 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9626 }
9627 else
9628 {
9629 size = 12;
9630 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9631 }
9632 }
9633 else
9634 {
9635 bfd_vma r2off;
9636
9637 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9638 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9639 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9640 loc += 4;
9641 size = 20;
9642 if (PPC_HA (off) != 0)
9643 {
9644 size += 4;
9645 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9646 loc += 4;
9647 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9648 loc += 4;
9649 }
9650 else
9651 {
9652 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9653 loc += 4;
9654 }
9655
9656 if (PPC_HA (r2off) != 0)
9657 {
9658 size += 4;
9659 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9660 loc += 4;
9661 }
9662 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9663 }
9664 loc += 4;
9665 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9666 loc += 4;
9667 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9668 break;
9669
9670 case ppc_stub_plt_call:
9671 if (stub_entry->h != NULL
9672 && stub_entry->h->is_func_descriptor
9673 && stub_entry->h->oh != NULL)
9674 {
9675 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9676
9677 /* If the old-ABI "dot-symbol" is undefined make it weak so
9678 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9679 FIXME: We used to define the symbol on one of the call
9680 stubs instead, which is why we test symbol section id
9681 against htab->top_id in various places. Likely all
9682 these checks could now disappear. */
9683 if (fh->elf.root.type == bfd_link_hash_undefined)
9684 fh->elf.root.type = bfd_link_hash_undefweak;
9685 }
9686
9687 /* Now build the stub. */
9688 dest = stub_entry->plt_ent->plt.offset & ~1;
9689 if (dest >= (bfd_vma) -2)
9690 abort ();
9691
9692 plt = htab->plt;
9693 if (!htab->elf.dynamic_sections_created
9694 || stub_entry->h == NULL
9695 || stub_entry->h->elf.dynindx == -1)
9696 plt = htab->iplt;
9697
9698 dest += plt->output_offset + plt->output_section->vma;
9699
9700 if (stub_entry->h == NULL
9701 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9702 {
9703 Elf_Internal_Rela rela;
9704 bfd_byte *rl;
9705
9706 rela.r_offset = dest;
9707 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9708 rela.r_addend = (stub_entry->target_value
9709 + stub_entry->target_section->output_offset
9710 + stub_entry->target_section->output_section->vma);
9711
9712 rl = (htab->reliplt->contents
9713 + (htab->reliplt->reloc_count++
9714 * sizeof (Elf64_External_Rela)));
9715 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9716 stub_entry->plt_ent->plt.offset |= 1;
9717 }
9718
9719 off = (dest
9720 - elf_gp (plt->output_section->owner)
9721 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9722
9723 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9724 {
9725 (*_bfd_error_handler)
9726 (_("linkage table error against `%s'"),
9727 stub_entry->h != NULL
9728 ? stub_entry->h->elf.root.root.string
9729 : "<local sym>");
9730 bfd_set_error (bfd_error_bad_value);
9731 htab->stub_error = TRUE;
9732 return FALSE;
9733 }
9734
9735 r = NULL;
9736 if (info->emitrelocations)
9737 {
9738 r = get_relocs (stub_entry->stub_sec,
9739 (2 + (PPC_HA (off) != 0)
9740 + (PPC_HA (off + 16) == PPC_HA (off))));
9741 if (r == NULL)
9742 return FALSE;
9743 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9744 if (bfd_big_endian (info->output_bfd))
9745 r[0].r_offset += 2;
9746 r[0].r_addend = dest;
9747 }
9748 if (stub_entry->h != NULL
9749 && (stub_entry->h == htab->tls_get_addr_fd
9750 || stub_entry->h == htab->tls_get_addr)
9751 && !htab->no_tls_get_addr_opt)
9752 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9753 else
9754 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9755 size = p - loc;
9756 break;
9757
9758 default:
9759 BFD_FAIL ();
9760 return FALSE;
9761 }
9762
9763 stub_entry->stub_sec->size += size;
9764
9765 if (htab->emit_stub_syms)
9766 {
9767 struct elf_link_hash_entry *h;
9768 size_t len1, len2;
9769 char *name;
9770 const char *const stub_str[] = { "long_branch",
9771 "long_branch_r2off",
9772 "plt_branch",
9773 "plt_branch_r2off",
9774 "plt_call" };
9775
9776 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9777 len2 = strlen (stub_entry->root.string);
9778 name = bfd_malloc (len1 + len2 + 2);
9779 if (name == NULL)
9780 return FALSE;
9781 memcpy (name, stub_entry->root.string, 9);
9782 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9783 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9784 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9785 if (h == NULL)
9786 return FALSE;
9787 if (h->root.type == bfd_link_hash_new)
9788 {
9789 h->root.type = bfd_link_hash_defined;
9790 h->root.u.def.section = stub_entry->stub_sec;
9791 h->root.u.def.value = stub_entry->stub_offset;
9792 h->ref_regular = 1;
9793 h->def_regular = 1;
9794 h->ref_regular_nonweak = 1;
9795 h->forced_local = 1;
9796 h->non_elf = 0;
9797 }
9798 }
9799
9800 return TRUE;
9801 }
9802
9803 /* As above, but don't actually build the stub. Just bump offset so
9804 we know stub section sizes, and select plt_branch stubs where
9805 long_branch stubs won't do. */
9806
9807 static bfd_boolean
9808 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9809 {
9810 struct ppc_stub_hash_entry *stub_entry;
9811 struct bfd_link_info *info;
9812 struct ppc_link_hash_table *htab;
9813 bfd_vma off;
9814 int size;
9815
9816 /* Massage our args to the form they really have. */
9817 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9818 info = in_arg;
9819
9820 htab = ppc_hash_table (info);
9821 if (htab == NULL)
9822 return FALSE;
9823
9824 if (stub_entry->stub_type == ppc_stub_plt_call)
9825 {
9826 asection *plt;
9827 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9828 if (off >= (bfd_vma) -2)
9829 abort ();
9830 plt = htab->plt;
9831 if (!htab->elf.dynamic_sections_created
9832 || stub_entry->h == NULL
9833 || stub_entry->h->elf.dynindx == -1)
9834 plt = htab->iplt;
9835 off += (plt->output_offset
9836 + plt->output_section->vma
9837 - elf_gp (plt->output_section->owner)
9838 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9839
9840 size = PLT_CALL_STUB_SIZE;
9841 if (PPC_HA (off) == 0)
9842 size -= 4;
9843 if (PPC_HA (off + 16) != PPC_HA (off))
9844 size += 4;
9845 if (stub_entry->h != NULL
9846 && (stub_entry->h == htab->tls_get_addr_fd
9847 || stub_entry->h == htab->tls_get_addr)
9848 && !htab->no_tls_get_addr_opt)
9849 size += 13 * 4;
9850 if (info->emitrelocations)
9851 {
9852 stub_entry->stub_sec->reloc_count
9853 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9854 stub_entry->stub_sec->flags |= SEC_RELOC;
9855 }
9856 }
9857 else
9858 {
9859 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9860 variants. */
9861 bfd_vma r2off = 0;
9862
9863 off = (stub_entry->target_value
9864 + stub_entry->target_section->output_offset
9865 + stub_entry->target_section->output_section->vma);
9866 off -= (stub_entry->stub_sec->size
9867 + stub_entry->stub_sec->output_offset
9868 + stub_entry->stub_sec->output_section->vma);
9869
9870 /* Reset the stub type from the plt variant in case we now
9871 can reach with a shorter stub. */
9872 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9873 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9874
9875 size = 4;
9876 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9877 {
9878 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9879 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9880 size = 12;
9881 if (PPC_HA (r2off) != 0)
9882 size = 16;
9883 off -= size - 4;
9884 }
9885
9886 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9887 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9888 {
9889 struct ppc_branch_hash_entry *br_entry;
9890
9891 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9892 stub_entry->root.string + 9,
9893 TRUE, FALSE);
9894 if (br_entry == NULL)
9895 {
9896 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9897 stub_entry->root.string);
9898 htab->stub_error = TRUE;
9899 return FALSE;
9900 }
9901
9902 if (br_entry->iter != htab->stub_iteration)
9903 {
9904 br_entry->iter = htab->stub_iteration;
9905 br_entry->offset = htab->brlt->size;
9906 htab->brlt->size += 8;
9907
9908 if (htab->relbrlt != NULL)
9909 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9910 else if (info->emitrelocations)
9911 {
9912 htab->brlt->reloc_count += 1;
9913 htab->brlt->flags |= SEC_RELOC;
9914 }
9915 }
9916
9917 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9918 off = (br_entry->offset
9919 + htab->brlt->output_offset
9920 + htab->brlt->output_section->vma
9921 - elf_gp (htab->brlt->output_section->owner)
9922 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9923
9924 if (info->emitrelocations)
9925 {
9926 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9927 stub_entry->stub_sec->flags |= SEC_RELOC;
9928 }
9929
9930 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9931 {
9932 size = 12;
9933 if (PPC_HA (off) != 0)
9934 size = 16;
9935 }
9936 else
9937 {
9938 size = 20;
9939 if (PPC_HA (off) != 0)
9940 size += 4;
9941
9942 if (PPC_HA (r2off) != 0)
9943 size += 4;
9944 }
9945 }
9946 else if (info->emitrelocations)
9947 {
9948 stub_entry->stub_sec->reloc_count += 1;
9949 stub_entry->stub_sec->flags |= SEC_RELOC;
9950 }
9951 }
9952
9953 stub_entry->stub_sec->size += size;
9954 return TRUE;
9955 }
9956
9957 /* Set up various things so that we can make a list of input sections
9958 for each output section included in the link. Returns -1 on error,
9959 0 when no stubs will be needed, and 1 on success. */
9960
9961 int
9962 ppc64_elf_setup_section_lists
9963 (struct bfd_link_info *info,
9964 asection *(*add_stub_section) (const char *, asection *),
9965 void (*layout_sections_again) (void))
9966 {
9967 bfd *input_bfd;
9968 int top_id, top_index, id;
9969 asection *section;
9970 asection **input_list;
9971 bfd_size_type amt;
9972 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9973
9974 if (htab == NULL)
9975 return -1;
9976 /* Stash our params away. */
9977 htab->add_stub_section = add_stub_section;
9978 htab->layout_sections_again = layout_sections_again;
9979
9980 if (htab->brlt == NULL)
9981 return 0;
9982
9983 /* Find the top input section id. */
9984 for (input_bfd = info->input_bfds, top_id = 3;
9985 input_bfd != NULL;
9986 input_bfd = input_bfd->link_next)
9987 {
9988 for (section = input_bfd->sections;
9989 section != NULL;
9990 section = section->next)
9991 {
9992 if (top_id < section->id)
9993 top_id = section->id;
9994 }
9995 }
9996
9997 htab->top_id = top_id;
9998 amt = sizeof (struct map_stub) * (top_id + 1);
9999 htab->stub_group = bfd_zmalloc (amt);
10000 if (htab->stub_group == NULL)
10001 return -1;
10002
10003 /* Set toc_off for com, und, abs and ind sections. */
10004 for (id = 0; id < 3; id++)
10005 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10006
10007 /* We can't use output_bfd->section_count here to find the top output
10008 section index as some sections may have been removed, and
10009 strip_excluded_output_sections doesn't renumber the indices. */
10010 for (section = info->output_bfd->sections, top_index = 0;
10011 section != NULL;
10012 section = section->next)
10013 {
10014 if (top_index < section->index)
10015 top_index = section->index;
10016 }
10017
10018 htab->top_index = top_index;
10019 amt = sizeof (asection *) * (top_index + 1);
10020 input_list = bfd_zmalloc (amt);
10021 htab->input_list = input_list;
10022 if (input_list == NULL)
10023 return -1;
10024
10025 return 1;
10026 }
10027
10028 /* Set up for first pass at multitoc partitioning. */
10029
10030 void
10031 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10032 {
10033 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10034
10035 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10036 htab->toc_curr = elf_gp (info->output_bfd);
10037 htab->toc_bfd = NULL;
10038 htab->toc_first_sec = NULL;
10039 }
10040
10041 /* The linker repeatedly calls this function for each TOC input section
10042 and linker generated GOT section. Group input bfds such that the toc
10043 within a group is less than 64k in size. */
10044
10045 bfd_boolean
10046 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10047 {
10048 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10049 bfd_vma addr, off, limit;
10050
10051 if (htab == NULL)
10052 return FALSE;
10053
10054 if (!htab->second_toc_pass)
10055 {
10056 /* Keep track of the first .toc or .got section for this input bfd. */
10057 if (htab->toc_bfd != isec->owner)
10058 {
10059 htab->toc_bfd = isec->owner;
10060 htab->toc_first_sec = isec;
10061 }
10062
10063 addr = isec->output_offset + isec->output_section->vma;
10064 off = addr - htab->toc_curr;
10065 limit = 0x80008000;
10066 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10067 limit = 0x10000;
10068 if (off + isec->size > limit)
10069 {
10070 addr = (htab->toc_first_sec->output_offset
10071 + htab->toc_first_sec->output_section->vma);
10072 htab->toc_curr = addr;
10073 }
10074
10075 /* toc_curr is the base address of this toc group. Set elf_gp
10076 for the input section to be the offset relative to the
10077 output toc base plus 0x8000. Making the input elf_gp an
10078 offset allows us to move the toc as a whole without
10079 recalculating input elf_gp. */
10080 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10081 off += TOC_BASE_OFF;
10082
10083 /* Die if someone uses a linker script that doesn't keep input
10084 file .toc and .got together. */
10085 if (elf_gp (isec->owner) != 0
10086 && elf_gp (isec->owner) != off)
10087 return FALSE;
10088
10089 elf_gp (isec->owner) = off;
10090 return TRUE;
10091 }
10092
10093 /* During the second pass toc_first_sec points to the start of
10094 a toc group, and toc_curr is used to track the old elf_gp.
10095 We use toc_bfd to ensure we only look at each bfd once. */
10096 if (htab->toc_bfd == isec->owner)
10097 return TRUE;
10098 htab->toc_bfd = isec->owner;
10099
10100 if (htab->toc_first_sec == NULL
10101 || htab->toc_curr != elf_gp (isec->owner))
10102 {
10103 htab->toc_curr = elf_gp (isec->owner);
10104 htab->toc_first_sec = isec;
10105 }
10106 addr = (htab->toc_first_sec->output_offset
10107 + htab->toc_first_sec->output_section->vma);
10108 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10109 elf_gp (isec->owner) = off;
10110
10111 return TRUE;
10112 }
10113
10114 /* Called via elf_link_hash_traverse to merge GOT entries for global
10115 symbol H. */
10116
10117 static bfd_boolean
10118 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10119 {
10120 if (h->root.type == bfd_link_hash_indirect)
10121 return TRUE;
10122
10123 if (h->root.type == bfd_link_hash_warning)
10124 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10125
10126 merge_got_entries (&h->got.glist);
10127
10128 return TRUE;
10129 }
10130
10131 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10132 symbol H. */
10133
10134 static bfd_boolean
10135 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10136 {
10137 struct got_entry *gent;
10138
10139 if (h->root.type == bfd_link_hash_indirect)
10140 return TRUE;
10141
10142 if (h->root.type == bfd_link_hash_warning)
10143 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10144
10145 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10146 if (!gent->is_indirect)
10147 allocate_got (h, (struct bfd_link_info *) inf, gent);
10148 return TRUE;
10149 }
10150
10151 /* Called on the first multitoc pass after the last call to
10152 ppc64_elf_next_toc_section. This function removes duplicate GOT
10153 entries. */
10154
10155 bfd_boolean
10156 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10157 {
10158 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10159 struct bfd *ibfd, *ibfd2;
10160 bfd_boolean done_something;
10161
10162 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10163
10164 if (!htab->do_multi_toc)
10165 return FALSE;
10166
10167 /* Merge global sym got entries within a toc group. */
10168 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10169
10170 /* And tlsld_got. */
10171 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10172 {
10173 struct got_entry *ent, *ent2;
10174
10175 if (!is_ppc64_elf (ibfd))
10176 continue;
10177
10178 ent = ppc64_tlsld_got (ibfd);
10179 if (!ent->is_indirect
10180 && ent->got.offset != (bfd_vma) -1)
10181 {
10182 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10183 {
10184 if (!is_ppc64_elf (ibfd2))
10185 continue;
10186
10187 ent2 = ppc64_tlsld_got (ibfd2);
10188 if (!ent2->is_indirect
10189 && ent2->got.offset != (bfd_vma) -1
10190 && elf_gp (ibfd2) == elf_gp (ibfd))
10191 {
10192 ent2->is_indirect = TRUE;
10193 ent2->got.ent = ent;
10194 }
10195 }
10196 }
10197 }
10198
10199 /* Zap sizes of got sections. */
10200 htab->reliplt->rawsize = htab->reliplt->size;
10201 htab->reliplt->size -= htab->got_reli_size;
10202 htab->got_reli_size = 0;
10203
10204 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10205 {
10206 asection *got, *relgot;
10207
10208 if (!is_ppc64_elf (ibfd))
10209 continue;
10210
10211 got = ppc64_elf_tdata (ibfd)->got;
10212 if (got != NULL)
10213 {
10214 got->rawsize = got->size;
10215 got->size = 0;
10216 relgot = ppc64_elf_tdata (ibfd)->relgot;
10217 relgot->rawsize = relgot->size;
10218 relgot->size = 0;
10219 }
10220 }
10221
10222 /* Now reallocate the got, local syms first. We don't need to
10223 allocate section contents again since we never increase size. */
10224 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10225 {
10226 struct got_entry **lgot_ents;
10227 struct got_entry **end_lgot_ents;
10228 struct plt_entry **local_plt;
10229 struct plt_entry **end_local_plt;
10230 unsigned char *lgot_masks;
10231 bfd_size_type locsymcount;
10232 Elf_Internal_Shdr *symtab_hdr;
10233 asection *s, *srel;
10234
10235 if (!is_ppc64_elf (ibfd))
10236 continue;
10237
10238 lgot_ents = elf_local_got_ents (ibfd);
10239 if (!lgot_ents)
10240 continue;
10241
10242 symtab_hdr = &elf_symtab_hdr (ibfd);
10243 locsymcount = symtab_hdr->sh_info;
10244 end_lgot_ents = lgot_ents + locsymcount;
10245 local_plt = (struct plt_entry **) end_lgot_ents;
10246 end_local_plt = local_plt + locsymcount;
10247 lgot_masks = (unsigned char *) end_local_plt;
10248 s = ppc64_elf_tdata (ibfd)->got;
10249 srel = ppc64_elf_tdata (ibfd)->relgot;
10250 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10251 {
10252 struct got_entry *ent;
10253
10254 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10255 {
10256 unsigned int num = 1;
10257 ent->got.offset = s->size;
10258 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10259 num = 2;
10260 s->size += num * 8;
10261 if (info->shared)
10262 srel->size += num * sizeof (Elf64_External_Rela);
10263 else if ((*lgot_masks & PLT_IFUNC) != 0)
10264 {
10265 htab->reliplt->size
10266 += num * sizeof (Elf64_External_Rela);
10267 htab->got_reli_size
10268 += num * sizeof (Elf64_External_Rela);
10269 }
10270 }
10271 }
10272 }
10273
10274 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10275
10276 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10277 {
10278 struct got_entry *ent;
10279
10280 if (!is_ppc64_elf (ibfd))
10281 continue;
10282
10283 ent = ppc64_tlsld_got (ibfd);
10284 if (!ent->is_indirect
10285 && ent->got.offset != (bfd_vma) -1)
10286 {
10287 asection *s = ppc64_elf_tdata (ibfd)->got;
10288 ent->got.offset = s->size;
10289 s->size += 16;
10290 if (info->shared)
10291 {
10292 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10293 srel->size += sizeof (Elf64_External_Rela);
10294 }
10295 }
10296 }
10297
10298 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10299 if (!done_something)
10300 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10301 {
10302 asection *got;
10303
10304 if (!is_ppc64_elf (ibfd))
10305 continue;
10306
10307 got = ppc64_elf_tdata (ibfd)->got;
10308 if (got != NULL)
10309 {
10310 done_something = got->rawsize != got->size;
10311 if (done_something)
10312 break;
10313 }
10314 }
10315
10316 if (done_something)
10317 (*htab->layout_sections_again) ();
10318
10319 /* Set up for second pass over toc sections to recalculate elf_gp
10320 on input sections. */
10321 htab->toc_bfd = NULL;
10322 htab->toc_first_sec = NULL;
10323 htab->second_toc_pass = TRUE;
10324 return done_something;
10325 }
10326
10327 /* Called after second pass of multitoc partitioning. */
10328
10329 void
10330 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10331 {
10332 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10333
10334 /* After the second pass, toc_curr tracks the TOC offset used
10335 for code sections below in ppc64_elf_next_input_section. */
10336 htab->toc_curr = TOC_BASE_OFF;
10337 }
10338
10339 /* No toc references were found in ISEC. If the code in ISEC makes no
10340 calls, then there's no need to use toc adjusting stubs when branching
10341 into ISEC. Actually, indirect calls from ISEC are OK as they will
10342 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10343 needed, and 2 if a cyclical call-graph was found but no other reason
10344 for a stub was detected. If called from the top level, a return of
10345 2 means the same as a return of 0. */
10346
10347 static int
10348 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10349 {
10350 int ret;
10351
10352 /* Mark this section as checked. */
10353 isec->call_check_done = 1;
10354
10355 /* We know none of our code bearing sections will need toc stubs. */
10356 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10357 return 0;
10358
10359 if (isec->size == 0)
10360 return 0;
10361
10362 if (isec->output_section == NULL)
10363 return 0;
10364
10365 ret = 0;
10366 if (isec->reloc_count != 0)
10367 {
10368 Elf_Internal_Rela *relstart, *rel;
10369 Elf_Internal_Sym *local_syms;
10370 struct ppc_link_hash_table *htab;
10371
10372 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10373 info->keep_memory);
10374 if (relstart == NULL)
10375 return -1;
10376
10377 /* Look for branches to outside of this section. */
10378 local_syms = NULL;
10379 htab = ppc_hash_table (info);
10380 if (htab == NULL)
10381 return -1;
10382
10383 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10384 {
10385 enum elf_ppc64_reloc_type r_type;
10386 unsigned long r_symndx;
10387 struct elf_link_hash_entry *h;
10388 struct ppc_link_hash_entry *eh;
10389 Elf_Internal_Sym *sym;
10390 asection *sym_sec;
10391 struct _opd_sec_data *opd;
10392 bfd_vma sym_value;
10393 bfd_vma dest;
10394
10395 r_type = ELF64_R_TYPE (rel->r_info);
10396 if (r_type != R_PPC64_REL24
10397 && r_type != R_PPC64_REL14
10398 && r_type != R_PPC64_REL14_BRTAKEN
10399 && r_type != R_PPC64_REL14_BRNTAKEN)
10400 continue;
10401
10402 r_symndx = ELF64_R_SYM (rel->r_info);
10403 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10404 isec->owner))
10405 {
10406 ret = -1;
10407 break;
10408 }
10409
10410 /* Calls to dynamic lib functions go through a plt call stub
10411 that uses r2. */
10412 eh = (struct ppc_link_hash_entry *) h;
10413 if (eh != NULL
10414 && (eh->elf.plt.plist != NULL
10415 || (eh->oh != NULL
10416 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10417 {
10418 ret = 1;
10419 break;
10420 }
10421
10422 if (sym_sec == NULL)
10423 /* Ignore other undefined symbols. */
10424 continue;
10425
10426 /* Assume branches to other sections not included in the
10427 link need stubs too, to cover -R and absolute syms. */
10428 if (sym_sec->output_section == NULL)
10429 {
10430 ret = 1;
10431 break;
10432 }
10433
10434 if (h == NULL)
10435 sym_value = sym->st_value;
10436 else
10437 {
10438 if (h->root.type != bfd_link_hash_defined
10439 && h->root.type != bfd_link_hash_defweak)
10440 abort ();
10441 sym_value = h->root.u.def.value;
10442 }
10443 sym_value += rel->r_addend;
10444
10445 /* If this branch reloc uses an opd sym, find the code section. */
10446 opd = get_opd_info (sym_sec);
10447 if (opd != NULL)
10448 {
10449 if (h == NULL && opd->adjust != NULL)
10450 {
10451 long adjust;
10452
10453 adjust = opd->adjust[sym->st_value / 8];
10454 if (adjust == -1)
10455 /* Assume deleted functions won't ever be called. */
10456 continue;
10457 sym_value += adjust;
10458 }
10459
10460 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10461 if (dest == (bfd_vma) -1)
10462 continue;
10463 }
10464 else
10465 dest = (sym_value
10466 + sym_sec->output_offset
10467 + sym_sec->output_section->vma);
10468
10469 /* Ignore branch to self. */
10470 if (sym_sec == isec)
10471 continue;
10472
10473 /* If the called function uses the toc, we need a stub. */
10474 if (sym_sec->has_toc_reloc
10475 || sym_sec->makes_toc_func_call)
10476 {
10477 ret = 1;
10478 break;
10479 }
10480
10481 /* Assume any branch that needs a long branch stub might in fact
10482 need a plt_branch stub. A plt_branch stub uses r2. */
10483 else if (dest - (isec->output_offset
10484 + isec->output_section->vma
10485 + rel->r_offset) + (1 << 25) >= (2 << 25))
10486 {
10487 ret = 1;
10488 break;
10489 }
10490
10491 /* If calling back to a section in the process of being
10492 tested, we can't say for sure that no toc adjusting stubs
10493 are needed, so don't return zero. */
10494 else if (sym_sec->call_check_in_progress)
10495 ret = 2;
10496
10497 /* Branches to another section that itself doesn't have any TOC
10498 references are OK. Recursively call ourselves to check. */
10499 else if (!sym_sec->call_check_done)
10500 {
10501 int recur;
10502
10503 /* Mark current section as indeterminate, so that other
10504 sections that call back to current won't be marked as
10505 known. */
10506 isec->call_check_in_progress = 1;
10507 recur = toc_adjusting_stub_needed (info, sym_sec);
10508 isec->call_check_in_progress = 0;
10509
10510 if (recur != 0)
10511 {
10512 ret = recur;
10513 if (recur != 2)
10514 break;
10515 }
10516 }
10517 }
10518
10519 if (local_syms != NULL
10520 && (elf_symtab_hdr (isec->owner).contents
10521 != (unsigned char *) local_syms))
10522 free (local_syms);
10523 if (elf_section_data (isec)->relocs != relstart)
10524 free (relstart);
10525 }
10526
10527 if ((ret & 1) == 0
10528 && isec->map_head.s != NULL
10529 && (strcmp (isec->output_section->name, ".init") == 0
10530 || strcmp (isec->output_section->name, ".fini") == 0))
10531 {
10532 if (isec->map_head.s->has_toc_reloc
10533 || isec->map_head.s->makes_toc_func_call)
10534 ret = 1;
10535 else if (!isec->map_head.s->call_check_done)
10536 {
10537 int recur;
10538 isec->call_check_in_progress = 1;
10539 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10540 isec->call_check_in_progress = 0;
10541 if (recur != 0)
10542 ret = recur;
10543 }
10544 }
10545
10546 if (ret == 1)
10547 isec->makes_toc_func_call = 1;
10548
10549 return ret;
10550 }
10551
10552 /* The linker repeatedly calls this function for each input section,
10553 in the order that input sections are linked into output sections.
10554 Build lists of input sections to determine groupings between which
10555 we may insert linker stubs. */
10556
10557 bfd_boolean
10558 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10559 {
10560 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10561
10562 if (htab == NULL)
10563 return FALSE;
10564
10565 if ((isec->output_section->flags & SEC_CODE) != 0
10566 && isec->output_section->index <= htab->top_index)
10567 {
10568 asection **list = htab->input_list + isec->output_section->index;
10569 /* Steal the link_sec pointer for our list. */
10570 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10571 /* This happens to make the list in reverse order,
10572 which is what we want. */
10573 PREV_SEC (isec) = *list;
10574 *list = isec;
10575 }
10576
10577 if (htab->multi_toc_needed)
10578 {
10579 /* If a code section has a function that uses the TOC then we need
10580 to use the right TOC (obviously). Also, make sure that .opd gets
10581 the correct TOC value for R_PPC64_TOC relocs that don't have or
10582 can't find their function symbol (shouldn't ever happen now).
10583 Also specially treat .fixup for the linux kernel. .fixup
10584 contains branches, but only back to the function that hit an
10585 exception. */
10586 if (isec->has_toc_reloc
10587 || (isec->flags & SEC_CODE) == 0
10588 || strcmp (isec->name, ".fixup") == 0)
10589 {
10590 if (elf_gp (isec->owner) != 0)
10591 htab->toc_curr = elf_gp (isec->owner);
10592 }
10593 else
10594 {
10595 if (!isec->call_check_done
10596 && toc_adjusting_stub_needed (info, isec) < 0)
10597 return FALSE;
10598 /* If we make a local call from this section, ie. a branch
10599 without a following nop, then we have no place to put a
10600 toc restoring insn. We must use the same toc group as
10601 the callee.
10602 Testing makes_toc_func_call actually tests for *any*
10603 calls to functions that need a good toc pointer. A more
10604 precise test would be better, as this one will set
10605 incorrect values for pasted .init/.fini fragments.
10606 (Fixed later in check_pasted_section.) */
10607 if (isec->makes_toc_func_call
10608 && elf_gp (isec->owner) != 0)
10609 htab->toc_curr = elf_gp (isec->owner);
10610 }
10611 }
10612
10613 /* Functions that don't use the TOC can belong in any TOC group.
10614 Use the last TOC base. */
10615 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10616 return TRUE;
10617 }
10618
10619 /* Check that all .init and .fini sections use the same toc, if they
10620 have toc relocs. */
10621
10622 static bfd_boolean
10623 check_pasted_section (struct bfd_link_info *info, const char *name)
10624 {
10625 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10626
10627 if (o != NULL)
10628 {
10629 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10630 bfd_vma toc_off = 0;
10631 asection *i;
10632
10633 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10634 if (i->has_toc_reloc)
10635 {
10636 if (toc_off == 0)
10637 toc_off = htab->stub_group[i->id].toc_off;
10638 else if (toc_off != htab->stub_group[i->id].toc_off)
10639 return FALSE;
10640 }
10641
10642 if (toc_off == 0)
10643 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10644 if (i->makes_toc_func_call)
10645 {
10646 toc_off = htab->stub_group[i->id].toc_off;
10647 break;
10648 }
10649
10650 /* Make sure the whole pasted function uses the same toc offset. */
10651 if (toc_off != 0)
10652 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10653 htab->stub_group[i->id].toc_off = toc_off;
10654 }
10655 return TRUE;
10656 }
10657
10658 bfd_boolean
10659 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10660 {
10661 return (check_pasted_section (info, ".init")
10662 & check_pasted_section (info, ".fini"));
10663 }
10664
10665 /* See whether we can group stub sections together. Grouping stub
10666 sections may result in fewer stubs. More importantly, we need to
10667 put all .init* and .fini* stubs at the beginning of the .init or
10668 .fini output sections respectively, because glibc splits the
10669 _init and _fini functions into multiple parts. Putting a stub in
10670 the middle of a function is not a good idea. */
10671
10672 static void
10673 group_sections (struct ppc_link_hash_table *htab,
10674 bfd_size_type stub_group_size,
10675 bfd_boolean stubs_always_before_branch)
10676 {
10677 asection **list;
10678 bfd_size_type stub14_group_size;
10679 bfd_boolean suppress_size_errors;
10680
10681 suppress_size_errors = FALSE;
10682 stub14_group_size = stub_group_size;
10683 if (stub_group_size == 1)
10684 {
10685 /* Default values. */
10686 if (stubs_always_before_branch)
10687 {
10688 stub_group_size = 0x1e00000;
10689 stub14_group_size = 0x7800;
10690 }
10691 else
10692 {
10693 stub_group_size = 0x1c00000;
10694 stub14_group_size = 0x7000;
10695 }
10696 suppress_size_errors = TRUE;
10697 }
10698
10699 list = htab->input_list + htab->top_index;
10700 do
10701 {
10702 asection *tail = *list;
10703 while (tail != NULL)
10704 {
10705 asection *curr;
10706 asection *prev;
10707 bfd_size_type total;
10708 bfd_boolean big_sec;
10709 bfd_vma curr_toc;
10710
10711 curr = tail;
10712 total = tail->size;
10713 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10714 && ppc64_elf_section_data (tail)->has_14bit_branch
10715 ? stub14_group_size : stub_group_size);
10716 if (big_sec && !suppress_size_errors)
10717 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10718 tail->owner, tail);
10719 curr_toc = htab->stub_group[tail->id].toc_off;
10720
10721 while ((prev = PREV_SEC (curr)) != NULL
10722 && ((total += curr->output_offset - prev->output_offset)
10723 < (ppc64_elf_section_data (prev) != NULL
10724 && ppc64_elf_section_data (prev)->has_14bit_branch
10725 ? stub14_group_size : stub_group_size))
10726 && htab->stub_group[prev->id].toc_off == curr_toc)
10727 curr = prev;
10728
10729 /* OK, the size from the start of CURR to the end is less
10730 than stub_group_size and thus can be handled by one stub
10731 section. (or the tail section is itself larger than
10732 stub_group_size, in which case we may be toast.) We
10733 should really be keeping track of the total size of stubs
10734 added here, as stubs contribute to the final output
10735 section size. That's a little tricky, and this way will
10736 only break if stubs added make the total size more than
10737 2^25, ie. for the default stub_group_size, if stubs total
10738 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10739 do
10740 {
10741 prev = PREV_SEC (tail);
10742 /* Set up this stub group. */
10743 htab->stub_group[tail->id].link_sec = curr;
10744 }
10745 while (tail != curr && (tail = prev) != NULL);
10746
10747 /* But wait, there's more! Input sections up to stub_group_size
10748 bytes before the stub section can be handled by it too.
10749 Don't do this if we have a really large section after the
10750 stubs, as adding more stubs increases the chance that
10751 branches may not reach into the stub section. */
10752 if (!stubs_always_before_branch && !big_sec)
10753 {
10754 total = 0;
10755 while (prev != NULL
10756 && ((total += tail->output_offset - prev->output_offset)
10757 < (ppc64_elf_section_data (prev) != NULL
10758 && ppc64_elf_section_data (prev)->has_14bit_branch
10759 ? stub14_group_size : stub_group_size))
10760 && htab->stub_group[prev->id].toc_off == curr_toc)
10761 {
10762 tail = prev;
10763 prev = PREV_SEC (tail);
10764 htab->stub_group[tail->id].link_sec = curr;
10765 }
10766 }
10767 tail = prev;
10768 }
10769 }
10770 while (list-- != htab->input_list);
10771 free (htab->input_list);
10772 #undef PREV_SEC
10773 }
10774
10775 /* Determine and set the size of the stub section for a final link.
10776
10777 The basic idea here is to examine all the relocations looking for
10778 PC-relative calls to a target that is unreachable with a "bl"
10779 instruction. */
10780
10781 bfd_boolean
10782 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
10783 {
10784 bfd_size_type stub_group_size;
10785 bfd_boolean stubs_always_before_branch;
10786 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10787
10788 if (htab == NULL)
10789 return FALSE;
10790
10791 stubs_always_before_branch = group_size < 0;
10792 if (group_size < 0)
10793 stub_group_size = -group_size;
10794 else
10795 stub_group_size = group_size;
10796
10797 group_sections (htab, stub_group_size, stubs_always_before_branch);
10798
10799 while (1)
10800 {
10801 bfd *input_bfd;
10802 unsigned int bfd_indx;
10803 asection *stub_sec;
10804
10805 htab->stub_iteration += 1;
10806
10807 for (input_bfd = info->input_bfds, bfd_indx = 0;
10808 input_bfd != NULL;
10809 input_bfd = input_bfd->link_next, bfd_indx++)
10810 {
10811 Elf_Internal_Shdr *symtab_hdr;
10812 asection *section;
10813 Elf_Internal_Sym *local_syms = NULL;
10814
10815 if (!is_ppc64_elf (input_bfd))
10816 continue;
10817
10818 /* We'll need the symbol table in a second. */
10819 symtab_hdr = &elf_symtab_hdr (input_bfd);
10820 if (symtab_hdr->sh_info == 0)
10821 continue;
10822
10823 /* Walk over each section attached to the input bfd. */
10824 for (section = input_bfd->sections;
10825 section != NULL;
10826 section = section->next)
10827 {
10828 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10829
10830 /* If there aren't any relocs, then there's nothing more
10831 to do. */
10832 if ((section->flags & SEC_RELOC) == 0
10833 || (section->flags & SEC_ALLOC) == 0
10834 || (section->flags & SEC_LOAD) == 0
10835 || (section->flags & SEC_CODE) == 0
10836 || section->reloc_count == 0)
10837 continue;
10838
10839 /* If this section is a link-once section that will be
10840 discarded, then don't create any stubs. */
10841 if (section->output_section == NULL
10842 || section->output_section->owner != info->output_bfd)
10843 continue;
10844
10845 /* Get the relocs. */
10846 internal_relocs
10847 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10848 info->keep_memory);
10849 if (internal_relocs == NULL)
10850 goto error_ret_free_local;
10851
10852 /* Now examine each relocation. */
10853 irela = internal_relocs;
10854 irelaend = irela + section->reloc_count;
10855 for (; irela < irelaend; irela++)
10856 {
10857 enum elf_ppc64_reloc_type r_type;
10858 unsigned int r_indx;
10859 enum ppc_stub_type stub_type;
10860 struct ppc_stub_hash_entry *stub_entry;
10861 asection *sym_sec, *code_sec;
10862 bfd_vma sym_value, code_value;
10863 bfd_vma destination;
10864 bfd_boolean ok_dest;
10865 struct ppc_link_hash_entry *hash;
10866 struct ppc_link_hash_entry *fdh;
10867 struct elf_link_hash_entry *h;
10868 Elf_Internal_Sym *sym;
10869 char *stub_name;
10870 const asection *id_sec;
10871 struct _opd_sec_data *opd;
10872 struct plt_entry *plt_ent;
10873
10874 r_type = ELF64_R_TYPE (irela->r_info);
10875 r_indx = ELF64_R_SYM (irela->r_info);
10876
10877 if (r_type >= R_PPC64_max)
10878 {
10879 bfd_set_error (bfd_error_bad_value);
10880 goto error_ret_free_internal;
10881 }
10882
10883 /* Only look for stubs on branch instructions. */
10884 if (r_type != R_PPC64_REL24
10885 && r_type != R_PPC64_REL14
10886 && r_type != R_PPC64_REL14_BRTAKEN
10887 && r_type != R_PPC64_REL14_BRNTAKEN)
10888 continue;
10889
10890 /* Now determine the call target, its name, value,
10891 section. */
10892 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10893 r_indx, input_bfd))
10894 goto error_ret_free_internal;
10895 hash = (struct ppc_link_hash_entry *) h;
10896
10897 ok_dest = FALSE;
10898 fdh = NULL;
10899 sym_value = 0;
10900 if (hash == NULL)
10901 {
10902 sym_value = sym->st_value;
10903 ok_dest = TRUE;
10904 }
10905 else if (hash->elf.root.type == bfd_link_hash_defined
10906 || hash->elf.root.type == bfd_link_hash_defweak)
10907 {
10908 sym_value = hash->elf.root.u.def.value;
10909 if (sym_sec->output_section != NULL)
10910 ok_dest = TRUE;
10911 }
10912 else if (hash->elf.root.type == bfd_link_hash_undefweak
10913 || hash->elf.root.type == bfd_link_hash_undefined)
10914 {
10915 /* Recognise an old ABI func code entry sym, and
10916 use the func descriptor sym instead if it is
10917 defined. */
10918 if (hash->elf.root.root.string[0] == '.'
10919 && (fdh = lookup_fdh (hash, htab)) != NULL)
10920 {
10921 if (fdh->elf.root.type == bfd_link_hash_defined
10922 || fdh->elf.root.type == bfd_link_hash_defweak)
10923 {
10924 sym_sec = fdh->elf.root.u.def.section;
10925 sym_value = fdh->elf.root.u.def.value;
10926 if (sym_sec->output_section != NULL)
10927 ok_dest = TRUE;
10928 }
10929 else
10930 fdh = NULL;
10931 }
10932 }
10933 else
10934 {
10935 bfd_set_error (bfd_error_bad_value);
10936 goto error_ret_free_internal;
10937 }
10938
10939 destination = 0;
10940 if (ok_dest)
10941 {
10942 sym_value += irela->r_addend;
10943 destination = (sym_value
10944 + sym_sec->output_offset
10945 + sym_sec->output_section->vma);
10946 }
10947
10948 code_sec = sym_sec;
10949 code_value = sym_value;
10950 opd = get_opd_info (sym_sec);
10951 if (opd != NULL)
10952 {
10953 bfd_vma dest;
10954
10955 if (hash == NULL && opd->adjust != NULL)
10956 {
10957 long adjust = opd->adjust[sym_value / 8];
10958 if (adjust == -1)
10959 continue;
10960 code_value += adjust;
10961 sym_value += adjust;
10962 }
10963 dest = opd_entry_value (sym_sec, sym_value,
10964 &code_sec, &code_value);
10965 if (dest != (bfd_vma) -1)
10966 {
10967 destination = dest;
10968 if (fdh != NULL)
10969 {
10970 /* Fixup old ABI sym to point at code
10971 entry. */
10972 hash->elf.root.type = bfd_link_hash_defweak;
10973 hash->elf.root.u.def.section = code_sec;
10974 hash->elf.root.u.def.value = code_value;
10975 }
10976 }
10977 }
10978
10979 /* Determine what (if any) linker stub is needed. */
10980 plt_ent = NULL;
10981 stub_type = ppc_type_of_stub (section, irela, &hash,
10982 &plt_ent, destination);
10983
10984 if (stub_type != ppc_stub_plt_call)
10985 {
10986 /* Check whether we need a TOC adjusting stub.
10987 Since the linker pastes together pieces from
10988 different object files when creating the
10989 _init and _fini functions, it may be that a
10990 call to what looks like a local sym is in
10991 fact a call needing a TOC adjustment. */
10992 if (code_sec != NULL
10993 && code_sec->output_section != NULL
10994 && (htab->stub_group[code_sec->id].toc_off
10995 != htab->stub_group[section->id].toc_off)
10996 && (code_sec->has_toc_reloc
10997 || code_sec->makes_toc_func_call))
10998 stub_type = ppc_stub_long_branch_r2off;
10999 }
11000
11001 if (stub_type == ppc_stub_none)
11002 continue;
11003
11004 /* __tls_get_addr calls might be eliminated. */
11005 if (stub_type != ppc_stub_plt_call
11006 && hash != NULL
11007 && (hash == htab->tls_get_addr
11008 || hash == htab->tls_get_addr_fd)
11009 && section->has_tls_reloc
11010 && irela != internal_relocs)
11011 {
11012 /* Get tls info. */
11013 unsigned char *tls_mask;
11014
11015 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11016 irela - 1, input_bfd))
11017 goto error_ret_free_internal;
11018 if (*tls_mask != 0)
11019 continue;
11020 }
11021
11022 /* Support for grouping stub sections. */
11023 id_sec = htab->stub_group[section->id].link_sec;
11024
11025 /* Get the name of this stub. */
11026 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11027 if (!stub_name)
11028 goto error_ret_free_internal;
11029
11030 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11031 stub_name, FALSE, FALSE);
11032 if (stub_entry != NULL)
11033 {
11034 /* The proper stub has already been created. */
11035 free (stub_name);
11036 continue;
11037 }
11038
11039 stub_entry = ppc_add_stub (stub_name, section, htab);
11040 if (stub_entry == NULL)
11041 {
11042 free (stub_name);
11043 error_ret_free_internal:
11044 if (elf_section_data (section)->relocs == NULL)
11045 free (internal_relocs);
11046 error_ret_free_local:
11047 if (local_syms != NULL
11048 && (symtab_hdr->contents
11049 != (unsigned char *) local_syms))
11050 free (local_syms);
11051 return FALSE;
11052 }
11053
11054 stub_entry->stub_type = stub_type;
11055 if (stub_type != ppc_stub_plt_call)
11056 {
11057 stub_entry->target_value = code_value;
11058 stub_entry->target_section = code_sec;
11059 }
11060 else
11061 {
11062 stub_entry->target_value = sym_value;
11063 stub_entry->target_section = sym_sec;
11064 }
11065 stub_entry->h = hash;
11066 stub_entry->plt_ent = plt_ent;
11067 stub_entry->addend = irela->r_addend;
11068
11069 if (stub_entry->h != NULL)
11070 htab->stub_globals += 1;
11071 }
11072
11073 /* We're done with the internal relocs, free them. */
11074 if (elf_section_data (section)->relocs != internal_relocs)
11075 free (internal_relocs);
11076 }
11077
11078 if (local_syms != NULL
11079 && symtab_hdr->contents != (unsigned char *) local_syms)
11080 {
11081 if (!info->keep_memory)
11082 free (local_syms);
11083 else
11084 symtab_hdr->contents = (unsigned char *) local_syms;
11085 }
11086 }
11087
11088 /* We may have added some stubs. Find out the new size of the
11089 stub sections. */
11090 for (stub_sec = htab->stub_bfd->sections;
11091 stub_sec != NULL;
11092 stub_sec = stub_sec->next)
11093 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11094 {
11095 stub_sec->rawsize = stub_sec->size;
11096 stub_sec->size = 0;
11097 stub_sec->reloc_count = 0;
11098 stub_sec->flags &= ~SEC_RELOC;
11099 }
11100
11101 htab->brlt->size = 0;
11102 htab->brlt->reloc_count = 0;
11103 htab->brlt->flags &= ~SEC_RELOC;
11104 if (htab->relbrlt != NULL)
11105 htab->relbrlt->size = 0;
11106
11107 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11108
11109 if (info->emitrelocations
11110 && htab->glink != NULL && htab->glink->size != 0)
11111 {
11112 htab->glink->reloc_count = 1;
11113 htab->glink->flags |= SEC_RELOC;
11114 }
11115
11116 for (stub_sec = htab->stub_bfd->sections;
11117 stub_sec != NULL;
11118 stub_sec = stub_sec->next)
11119 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11120 && stub_sec->rawsize != stub_sec->size)
11121 break;
11122
11123 /* Exit from this loop when no stubs have been added, and no stubs
11124 have changed size. */
11125 if (stub_sec == NULL)
11126 break;
11127
11128 /* Ask the linker to do its stuff. */
11129 (*htab->layout_sections_again) ();
11130 }
11131
11132 /* It would be nice to strip htab->brlt from the output if the
11133 section is empty, but it's too late. If we strip sections here,
11134 the dynamic symbol table is corrupted since the section symbol
11135 for the stripped section isn't written. */
11136
11137 return TRUE;
11138 }
11139
11140 /* Called after we have determined section placement. If sections
11141 move, we'll be called again. Provide a value for TOCstart. */
11142
11143 bfd_vma
11144 ppc64_elf_toc (bfd *obfd)
11145 {
11146 asection *s;
11147 bfd_vma TOCstart;
11148
11149 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11150 order. The TOC starts where the first of these sections starts. */
11151 s = bfd_get_section_by_name (obfd, ".got");
11152 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11153 s = bfd_get_section_by_name (obfd, ".toc");
11154 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11155 s = bfd_get_section_by_name (obfd, ".tocbss");
11156 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11157 s = bfd_get_section_by_name (obfd, ".plt");
11158 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11159 {
11160 /* This may happen for
11161 o references to TOC base (SYM@toc / TOC[tc0]) without a
11162 .toc directive
11163 o bad linker script
11164 o --gc-sections and empty TOC sections
11165
11166 FIXME: Warn user? */
11167
11168 /* Look for a likely section. We probably won't even be
11169 using TOCstart. */
11170 for (s = obfd->sections; s != NULL; s = s->next)
11171 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11172 | SEC_EXCLUDE))
11173 == (SEC_ALLOC | SEC_SMALL_DATA))
11174 break;
11175 if (s == NULL)
11176 for (s = obfd->sections; s != NULL; s = s->next)
11177 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11178 == (SEC_ALLOC | SEC_SMALL_DATA))
11179 break;
11180 if (s == NULL)
11181 for (s = obfd->sections; s != NULL; s = s->next)
11182 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11183 == SEC_ALLOC)
11184 break;
11185 if (s == NULL)
11186 for (s = obfd->sections; s != NULL; s = s->next)
11187 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11188 break;
11189 }
11190
11191 TOCstart = 0;
11192 if (s != NULL)
11193 TOCstart = s->output_section->vma + s->output_offset;
11194
11195 return TOCstart;
11196 }
11197
11198 /* Build all the stubs associated with the current output file.
11199 The stubs are kept in a hash table attached to the main linker
11200 hash table. This function is called via gldelf64ppc_finish. */
11201
11202 bfd_boolean
11203 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11204 struct bfd_link_info *info,
11205 char **stats)
11206 {
11207 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11208 asection *stub_sec;
11209 bfd_byte *p;
11210 int stub_sec_count = 0;
11211
11212 if (htab == NULL)
11213 return FALSE;
11214
11215 htab->emit_stub_syms = emit_stub_syms;
11216
11217 /* Allocate memory to hold the linker stubs. */
11218 for (stub_sec = htab->stub_bfd->sections;
11219 stub_sec != NULL;
11220 stub_sec = stub_sec->next)
11221 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11222 && stub_sec->size != 0)
11223 {
11224 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11225 if (stub_sec->contents == NULL)
11226 return FALSE;
11227 /* We want to check that built size is the same as calculated
11228 size. rawsize is a convenient location to use. */
11229 stub_sec->rawsize = stub_sec->size;
11230 stub_sec->size = 0;
11231 }
11232
11233 if (htab->glink != NULL && htab->glink->size != 0)
11234 {
11235 unsigned int indx;
11236 bfd_vma plt0;
11237
11238 /* Build the .glink plt call stub. */
11239 if (htab->emit_stub_syms)
11240 {
11241 struct elf_link_hash_entry *h;
11242 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11243 TRUE, FALSE, FALSE);
11244 if (h == NULL)
11245 return FALSE;
11246 if (h->root.type == bfd_link_hash_new)
11247 {
11248 h->root.type = bfd_link_hash_defined;
11249 h->root.u.def.section = htab->glink;
11250 h->root.u.def.value = 8;
11251 h->ref_regular = 1;
11252 h->def_regular = 1;
11253 h->ref_regular_nonweak = 1;
11254 h->forced_local = 1;
11255 h->non_elf = 0;
11256 }
11257 }
11258 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11259 if (info->emitrelocations)
11260 {
11261 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11262 if (r == NULL)
11263 return FALSE;
11264 r->r_offset = (htab->glink->output_offset
11265 + htab->glink->output_section->vma);
11266 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11267 r->r_addend = plt0;
11268 }
11269 p = htab->glink->contents;
11270 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11271 bfd_put_64 (htab->glink->owner, plt0, p);
11272 p += 8;
11273 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11274 p += 4;
11275 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11276 p += 4;
11277 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11278 p += 4;
11279 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11280 p += 4;
11281 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11282 p += 4;
11283 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11284 p += 4;
11285 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11286 p += 4;
11287 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11288 p += 4;
11289 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11290 p += 4;
11291 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11292 p += 4;
11293 bfd_put_32 (htab->glink->owner, BCTR, p);
11294 p += 4;
11295 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11296 {
11297 bfd_put_32 (htab->glink->owner, NOP, p);
11298 p += 4;
11299 }
11300
11301 /* Build the .glink lazy link call stubs. */
11302 indx = 0;
11303 while (p < htab->glink->contents + htab->glink->size)
11304 {
11305 if (indx < 0x8000)
11306 {
11307 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11308 p += 4;
11309 }
11310 else
11311 {
11312 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11313 p += 4;
11314 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11315 p += 4;
11316 }
11317 bfd_put_32 (htab->glink->owner,
11318 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11319 indx++;
11320 p += 4;
11321 }
11322 htab->glink->rawsize = p - htab->glink->contents;
11323 }
11324
11325 if (htab->brlt->size != 0)
11326 {
11327 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11328 htab->brlt->size);
11329 if (htab->brlt->contents == NULL)
11330 return FALSE;
11331 }
11332 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11333 {
11334 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11335 htab->relbrlt->size);
11336 if (htab->relbrlt->contents == NULL)
11337 return FALSE;
11338 }
11339
11340 /* Build the stubs as directed by the stub hash table. */
11341 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11342
11343 if (htab->relbrlt != NULL)
11344 htab->relbrlt->reloc_count = 0;
11345
11346 for (stub_sec = htab->stub_bfd->sections;
11347 stub_sec != NULL;
11348 stub_sec = stub_sec->next)
11349 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11350 {
11351 stub_sec_count += 1;
11352 if (stub_sec->rawsize != stub_sec->size)
11353 break;
11354 }
11355
11356 if (stub_sec != NULL
11357 || htab->glink->rawsize != htab->glink->size)
11358 {
11359 htab->stub_error = TRUE;
11360 (*_bfd_error_handler) (_("stubs don't match calculated size"));
11361 }
11362
11363 if (htab->stub_error)
11364 return FALSE;
11365
11366 if (stats != NULL)
11367 {
11368 *stats = bfd_malloc (500);
11369 if (*stats == NULL)
11370 return FALSE;
11371
11372 sprintf (*stats, _("linker stubs in %u group%s\n"
11373 " branch %lu\n"
11374 " toc adjust %lu\n"
11375 " long branch %lu\n"
11376 " long toc adj %lu\n"
11377 " plt call %lu"),
11378 stub_sec_count,
11379 stub_sec_count == 1 ? "" : "s",
11380 htab->stub_count[ppc_stub_long_branch - 1],
11381 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11382 htab->stub_count[ppc_stub_plt_branch - 1],
11383 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11384 htab->stub_count[ppc_stub_plt_call - 1]);
11385 }
11386 return TRUE;
11387 }
11388
11389 /* This function undoes the changes made by add_symbol_adjust. */
11390
11391 static bfd_boolean
11392 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11393 {
11394 struct ppc_link_hash_entry *eh;
11395
11396 if (h->root.type == bfd_link_hash_indirect)
11397 return TRUE;
11398
11399 if (h->root.type == bfd_link_hash_warning)
11400 h = (struct elf_link_hash_entry *) h->root.u.i.link;
11401
11402 eh = (struct ppc_link_hash_entry *) h;
11403 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11404 return TRUE;
11405
11406 eh->elf.root.type = bfd_link_hash_undefined;
11407 return TRUE;
11408 }
11409
11410 void
11411 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11412 {
11413 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11414
11415 if (htab != NULL)
11416 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11417 }
11418
11419 /* What to do when ld finds relocations against symbols defined in
11420 discarded sections. */
11421
11422 static unsigned int
11423 ppc64_elf_action_discarded (asection *sec)
11424 {
11425 if (strcmp (".opd", sec->name) == 0)
11426 return 0;
11427
11428 if (strcmp (".toc", sec->name) == 0)
11429 return 0;
11430
11431 if (strcmp (".toc1", sec->name) == 0)
11432 return 0;
11433
11434 return _bfd_elf_default_action_discarded (sec);
11435 }
11436
11437 /* REL points to a low-part reloc on a largetoc instruction sequence.
11438 Find the matching high-part reloc instruction and verify that it
11439 is addis REG,x,imm. If so, set *REG to x and return a pointer to
11440 the high-part reloc. */
11441
11442 static const Elf_Internal_Rela *
11443 ha_reloc_match (const Elf_Internal_Rela *relocs,
11444 const Elf_Internal_Rela *rel,
11445 unsigned int *reg,
11446 bfd_boolean match_addend,
11447 const bfd *input_bfd,
11448 const bfd_byte *contents)
11449 {
11450 enum elf_ppc64_reloc_type r_type, r_type_ha;
11451 bfd_vma r_info_ha, r_addend;
11452
11453 r_type = ELF64_R_TYPE (rel->r_info);
11454 switch (r_type)
11455 {
11456 case R_PPC64_GOT_TLSLD16_LO:
11457 case R_PPC64_GOT_TLSGD16_LO:
11458 case R_PPC64_GOT_TPREL16_LO_DS:
11459 case R_PPC64_GOT_DTPREL16_LO_DS:
11460 case R_PPC64_GOT16_LO:
11461 case R_PPC64_TOC16_LO:
11462 r_type_ha = r_type + 2;
11463 break;
11464 case R_PPC64_GOT16_LO_DS:
11465 r_type_ha = R_PPC64_GOT16_HA;
11466 break;
11467 case R_PPC64_TOC16_LO_DS:
11468 r_type_ha = R_PPC64_TOC16_HA;
11469 break;
11470 default:
11471 abort ();
11472 }
11473 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11474 r_addend = rel->r_addend;
11475
11476 while (--rel >= relocs)
11477 if (rel->r_info == r_info_ha
11478 && (!match_addend
11479 || rel->r_addend == r_addend))
11480 {
11481 const bfd_byte *p = contents + (rel->r_offset & ~3);
11482 unsigned int insn = bfd_get_32 (input_bfd, p);
11483 if ((insn & (0x3f << 26)) == (15u << 26) /* addis rt,x,imm */
11484 && (insn & (0x1f << 21)) == (*reg << 21))
11485 {
11486 *reg = (insn >> 16) & 0x1f;
11487 return rel;
11488 }
11489 break;
11490 }
11491 return NULL;
11492 }
11493
11494 /* The RELOCATE_SECTION function is called by the ELF backend linker
11495 to handle the relocations for a section.
11496
11497 The relocs are always passed as Rela structures; if the section
11498 actually uses Rel structures, the r_addend field will always be
11499 zero.
11500
11501 This function is responsible for adjust the section contents as
11502 necessary, and (if using Rela relocs and generating a
11503 relocatable output file) adjusting the reloc addend as
11504 necessary.
11505
11506 This function does not have to worry about setting the reloc
11507 address or the reloc symbol index.
11508
11509 LOCAL_SYMS is a pointer to the swapped in local symbols.
11510
11511 LOCAL_SECTIONS is an array giving the section in the input file
11512 corresponding to the st_shndx field of each local symbol.
11513
11514 The global hash table entry for the global symbols can be found
11515 via elf_sym_hashes (input_bfd).
11516
11517 When generating relocatable output, this function must handle
11518 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11519 going to be the section symbol corresponding to the output
11520 section, which means that the addend must be adjusted
11521 accordingly. */
11522
11523 static bfd_boolean
11524 ppc64_elf_relocate_section (bfd *output_bfd,
11525 struct bfd_link_info *info,
11526 bfd *input_bfd,
11527 asection *input_section,
11528 bfd_byte *contents,
11529 Elf_Internal_Rela *relocs,
11530 Elf_Internal_Sym *local_syms,
11531 asection **local_sections)
11532 {
11533 struct ppc_link_hash_table *htab;
11534 Elf_Internal_Shdr *symtab_hdr;
11535 struct elf_link_hash_entry **sym_hashes;
11536 Elf_Internal_Rela *rel;
11537 Elf_Internal_Rela *relend;
11538 Elf_Internal_Rela outrel;
11539 bfd_byte *loc;
11540 struct got_entry **local_got_ents;
11541 unsigned char *ha_opt;
11542 bfd_vma TOCstart;
11543 bfd_boolean no_ha_opt;
11544 bfd_boolean ret = TRUE;
11545 bfd_boolean is_opd;
11546 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11547 bfd_boolean is_power4 = FALSE;
11548 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11549
11550 /* Initialize howto table if needed. */
11551 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11552 ppc_howto_init ();
11553
11554 htab = ppc_hash_table (info);
11555 if (htab == NULL)
11556 return FALSE;
11557
11558 /* Don't relocate stub sections. */
11559 if (input_section->owner == htab->stub_bfd)
11560 return TRUE;
11561
11562 BFD_ASSERT (is_ppc64_elf (input_bfd));
11563
11564 local_got_ents = elf_local_got_ents (input_bfd);
11565 TOCstart = elf_gp (output_bfd);
11566 symtab_hdr = &elf_symtab_hdr (input_bfd);
11567 sym_hashes = elf_sym_hashes (input_bfd);
11568 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11569 ha_opt = NULL;
11570 no_ha_opt = FALSE;
11571
11572 rel = relocs;
11573 relend = relocs + input_section->reloc_count;
11574 for (; rel < relend; rel++)
11575 {
11576 enum elf_ppc64_reloc_type r_type;
11577 bfd_vma addend, orig_addend;
11578 bfd_reloc_status_type r;
11579 Elf_Internal_Sym *sym;
11580 asection *sec;
11581 struct elf_link_hash_entry *h_elf;
11582 struct ppc_link_hash_entry *h;
11583 struct ppc_link_hash_entry *fdh;
11584 const char *sym_name;
11585 unsigned long r_symndx, toc_symndx;
11586 bfd_vma toc_addend;
11587 unsigned char tls_mask, tls_gd, tls_type;
11588 unsigned char sym_type;
11589 bfd_vma relocation;
11590 bfd_boolean unresolved_reloc;
11591 bfd_boolean warned;
11592 unsigned int insn;
11593 bfd_vma mask;
11594 struct ppc_stub_hash_entry *stub_entry;
11595 bfd_vma max_br_offset;
11596 bfd_vma from;
11597
11598 r_type = ELF64_R_TYPE (rel->r_info);
11599 r_symndx = ELF64_R_SYM (rel->r_info);
11600
11601 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11602 symbol of the previous ADDR64 reloc. The symbol gives us the
11603 proper TOC base to use. */
11604 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11605 && rel != relocs
11606 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11607 && is_opd)
11608 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11609
11610 sym = NULL;
11611 sec = NULL;
11612 h_elf = NULL;
11613 sym_name = NULL;
11614 unresolved_reloc = FALSE;
11615 warned = FALSE;
11616 orig_addend = rel->r_addend;
11617
11618 if (r_symndx < symtab_hdr->sh_info)
11619 {
11620 /* It's a local symbol. */
11621 struct _opd_sec_data *opd;
11622
11623 sym = local_syms + r_symndx;
11624 sec = local_sections[r_symndx];
11625 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11626 sym_type = ELF64_ST_TYPE (sym->st_info);
11627 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11628 opd = get_opd_info (sec);
11629 if (opd != NULL && opd->adjust != NULL)
11630 {
11631 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11632 if (adjust == -1)
11633 relocation = 0;
11634 else
11635 {
11636 /* If this is a relocation against the opd section sym
11637 and we have edited .opd, adjust the reloc addend so
11638 that ld -r and ld --emit-relocs output is correct.
11639 If it is a reloc against some other .opd symbol,
11640 then the symbol value will be adjusted later. */
11641 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11642 rel->r_addend += adjust;
11643 else
11644 relocation += adjust;
11645 }
11646 }
11647 }
11648 else
11649 {
11650 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11651 r_symndx, symtab_hdr, sym_hashes,
11652 h_elf, sec, relocation,
11653 unresolved_reloc, warned);
11654 sym_name = h_elf->root.root.string;
11655 sym_type = h_elf->type;
11656 }
11657 h = (struct ppc_link_hash_entry *) h_elf;
11658
11659 if (sec != NULL && elf_discarded_section (sec))
11660 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11661 rel, relend,
11662 ppc64_elf_howto_table[r_type],
11663 contents);
11664
11665 if (info->relocatable)
11666 continue;
11667
11668 /* TLS optimizations. Replace instruction sequences and relocs
11669 based on information we collected in tls_optimize. We edit
11670 RELOCS so that --emit-relocs will output something sensible
11671 for the final instruction stream. */
11672 tls_mask = 0;
11673 tls_gd = 0;
11674 toc_symndx = 0;
11675 if (h != NULL)
11676 tls_mask = h->tls_mask;
11677 else if (local_got_ents != NULL)
11678 {
11679 struct plt_entry **local_plt = (struct plt_entry **)
11680 (local_got_ents + symtab_hdr->sh_info);
11681 unsigned char *lgot_masks = (unsigned char *)
11682 (local_plt + symtab_hdr->sh_info);
11683 tls_mask = lgot_masks[r_symndx];
11684 }
11685 if (tls_mask == 0
11686 && (r_type == R_PPC64_TLS
11687 || r_type == R_PPC64_TLSGD
11688 || r_type == R_PPC64_TLSLD))
11689 {
11690 /* Check for toc tls entries. */
11691 unsigned char *toc_tls;
11692
11693 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11694 &local_syms, rel, input_bfd))
11695 return FALSE;
11696
11697 if (toc_tls)
11698 tls_mask = *toc_tls;
11699 }
11700
11701 /* Check that tls relocs are used with tls syms, and non-tls
11702 relocs are used with non-tls syms. */
11703 if (r_symndx != STN_UNDEF
11704 && r_type != R_PPC64_NONE
11705 && (h == NULL
11706 || h->elf.root.type == bfd_link_hash_defined
11707 || h->elf.root.type == bfd_link_hash_defweak)
11708 && (IS_PPC64_TLS_RELOC (r_type)
11709 != (sym_type == STT_TLS
11710 || (sym_type == STT_SECTION
11711 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11712 {
11713 if (tls_mask != 0
11714 && (r_type == R_PPC64_TLS
11715 || r_type == R_PPC64_TLSGD
11716 || r_type == R_PPC64_TLSLD))
11717 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11718 ;
11719 else
11720 (*_bfd_error_handler)
11721 (!IS_PPC64_TLS_RELOC (r_type)
11722 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
11723 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
11724 input_bfd,
11725 input_section,
11726 (long) rel->r_offset,
11727 ppc64_elf_howto_table[r_type]->name,
11728 sym_name);
11729 }
11730
11731 /* Ensure reloc mapping code below stays sane. */
11732 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11733 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11734 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11735 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11736 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11737 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11738 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11739 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11740 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11741 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11742 abort ();
11743
11744 switch (r_type)
11745 {
11746 default:
11747 break;
11748
11749 case R_PPC64_LO_DS_OPT:
11750 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11751 if ((insn & (0x3f << 26)) != 58u << 26)
11752 abort ();
11753 insn += (14u << 26) - (58u << 26);
11754 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11755 r_type = R_PPC64_TOC16_LO;
11756 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11757 break;
11758
11759 case R_PPC64_TOC16:
11760 case R_PPC64_TOC16_LO:
11761 case R_PPC64_TOC16_DS:
11762 case R_PPC64_TOC16_LO_DS:
11763 {
11764 /* Check for toc tls entries. */
11765 unsigned char *toc_tls;
11766 int retval;
11767
11768 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11769 &local_syms, rel, input_bfd);
11770 if (retval == 0)
11771 return FALSE;
11772
11773 if (toc_tls)
11774 {
11775 tls_mask = *toc_tls;
11776 if (r_type == R_PPC64_TOC16_DS
11777 || r_type == R_PPC64_TOC16_LO_DS)
11778 {
11779 if (tls_mask != 0
11780 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
11781 goto toctprel;
11782 }
11783 else
11784 {
11785 /* If we found a GD reloc pair, then we might be
11786 doing a GD->IE transition. */
11787 if (retval == 2)
11788 {
11789 tls_gd = TLS_TPRELGD;
11790 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11791 goto tls_ldgd_opt;
11792 }
11793 else if (retval == 3)
11794 {
11795 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11796 goto tls_ldgd_opt;
11797 }
11798 }
11799 }
11800 }
11801 break;
11802
11803 case R_PPC64_GOT_TPREL16_HI:
11804 case R_PPC64_GOT_TPREL16_HA:
11805 if (tls_mask != 0
11806 && (tls_mask & TLS_TPREL) == 0)
11807 {
11808 rel->r_offset -= d_offset;
11809 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11810 r_type = R_PPC64_NONE;
11811 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11812 }
11813 break;
11814
11815 case R_PPC64_GOT_TPREL16_DS:
11816 case R_PPC64_GOT_TPREL16_LO_DS:
11817 if (tls_mask != 0
11818 && (tls_mask & TLS_TPREL) == 0)
11819 {
11820 toctprel:
11821 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11822 insn &= 31 << 21;
11823 insn |= 0x3c0d0000; /* addis 0,13,0 */
11824 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11825 r_type = R_PPC64_TPREL16_HA;
11826 if (toc_symndx != 0)
11827 {
11828 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11829 rel->r_addend = toc_addend;
11830 /* We changed the symbol. Start over in order to
11831 get h, sym, sec etc. right. */
11832 rel--;
11833 continue;
11834 }
11835 else
11836 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11837 }
11838 break;
11839
11840 case R_PPC64_TLS:
11841 if (tls_mask != 0
11842 && (tls_mask & TLS_TPREL) == 0)
11843 {
11844 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11845 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11846 if (insn == 0)
11847 abort ();
11848 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11849 /* Was PPC64_TLS which sits on insn boundary, now
11850 PPC64_TPREL16_LO which is at low-order half-word. */
11851 rel->r_offset += d_offset;
11852 r_type = R_PPC64_TPREL16_LO;
11853 if (toc_symndx != 0)
11854 {
11855 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11856 rel->r_addend = toc_addend;
11857 /* We changed the symbol. Start over in order to
11858 get h, sym, sec etc. right. */
11859 rel--;
11860 continue;
11861 }
11862 else
11863 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11864 }
11865 break;
11866
11867 case R_PPC64_GOT_TLSGD16_HI:
11868 case R_PPC64_GOT_TLSGD16_HA:
11869 tls_gd = TLS_TPRELGD;
11870 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11871 goto tls_gdld_hi;
11872 break;
11873
11874 case R_PPC64_GOT_TLSLD16_HI:
11875 case R_PPC64_GOT_TLSLD16_HA:
11876 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11877 {
11878 tls_gdld_hi:
11879 if ((tls_mask & tls_gd) != 0)
11880 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11881 + R_PPC64_GOT_TPREL16_DS);
11882 else
11883 {
11884 rel->r_offset -= d_offset;
11885 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11886 r_type = R_PPC64_NONE;
11887 }
11888 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11889 }
11890 break;
11891
11892 case R_PPC64_GOT_TLSGD16:
11893 case R_PPC64_GOT_TLSGD16_LO:
11894 tls_gd = TLS_TPRELGD;
11895 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11896 goto tls_ldgd_opt;
11897 break;
11898
11899 case R_PPC64_GOT_TLSLD16:
11900 case R_PPC64_GOT_TLSLD16_LO:
11901 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11902 {
11903 unsigned int insn1, insn2, insn3;
11904 bfd_vma offset;
11905
11906 tls_ldgd_opt:
11907 offset = (bfd_vma) -1;
11908 /* If not using the newer R_PPC64_TLSGD/LD to mark
11909 __tls_get_addr calls, we must trust that the call
11910 stays with its arg setup insns, ie. that the next
11911 reloc is the __tls_get_addr call associated with
11912 the current reloc. Edit both insns. */
11913 if (input_section->has_tls_get_addr_call
11914 && rel + 1 < relend
11915 && branch_reloc_hash_match (input_bfd, rel + 1,
11916 htab->tls_get_addr,
11917 htab->tls_get_addr_fd))
11918 offset = rel[1].r_offset;
11919 if ((tls_mask & tls_gd) != 0)
11920 {
11921 /* IE */
11922 insn1 = bfd_get_32 (output_bfd,
11923 contents + rel->r_offset - d_offset);
11924 insn1 &= (1 << 26) - (1 << 2);
11925 insn1 |= 58 << 26; /* ld */
11926 insn2 = 0x7c636a14; /* add 3,3,13 */
11927 if (offset != (bfd_vma) -1)
11928 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11929 if ((tls_mask & TLS_EXPLICIT) == 0)
11930 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11931 + R_PPC64_GOT_TPREL16_DS);
11932 else
11933 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11934 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11935 }
11936 else
11937 {
11938 /* LE */
11939 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11940 insn2 = 0x38630000; /* addi 3,3,0 */
11941 if (tls_gd == 0)
11942 {
11943 /* Was an LD reloc. */
11944 if (toc_symndx)
11945 sec = local_sections[toc_symndx];
11946 for (r_symndx = 0;
11947 r_symndx < symtab_hdr->sh_info;
11948 r_symndx++)
11949 if (local_sections[r_symndx] == sec)
11950 break;
11951 if (r_symndx >= symtab_hdr->sh_info)
11952 r_symndx = STN_UNDEF;
11953 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11954 if (r_symndx != STN_UNDEF)
11955 rel->r_addend -= (local_syms[r_symndx].st_value
11956 + sec->output_offset
11957 + sec->output_section->vma);
11958 }
11959 else if (toc_symndx != 0)
11960 {
11961 r_symndx = toc_symndx;
11962 rel->r_addend = toc_addend;
11963 }
11964 r_type = R_PPC64_TPREL16_HA;
11965 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11966 if (offset != (bfd_vma) -1)
11967 {
11968 rel[1].r_info = ELF64_R_INFO (r_symndx,
11969 R_PPC64_TPREL16_LO);
11970 rel[1].r_offset = offset + d_offset;
11971 rel[1].r_addend = rel->r_addend;
11972 }
11973 }
11974 bfd_put_32 (output_bfd, insn1,
11975 contents + rel->r_offset - d_offset);
11976 if (offset != (bfd_vma) -1)
11977 {
11978 insn3 = bfd_get_32 (output_bfd,
11979 contents + offset + 4);
11980 if (insn3 == NOP
11981 || insn3 == CROR_151515 || insn3 == CROR_313131)
11982 {
11983 rel[1].r_offset += 4;
11984 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11985 insn2 = NOP;
11986 }
11987 bfd_put_32 (output_bfd, insn2, contents + offset);
11988 }
11989 if ((tls_mask & tls_gd) == 0
11990 && (tls_gd == 0 || toc_symndx != 0))
11991 {
11992 /* We changed the symbol. Start over in order
11993 to get h, sym, sec etc. right. */
11994 rel--;
11995 continue;
11996 }
11997 }
11998 break;
11999
12000 case R_PPC64_TLSGD:
12001 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12002 {
12003 unsigned int insn2, insn3;
12004 bfd_vma offset = rel->r_offset;
12005
12006 if ((tls_mask & TLS_TPRELGD) != 0)
12007 {
12008 /* IE */
12009 r_type = R_PPC64_NONE;
12010 insn2 = 0x7c636a14; /* add 3,3,13 */
12011 }
12012 else
12013 {
12014 /* LE */
12015 if (toc_symndx != 0)
12016 {
12017 r_symndx = toc_symndx;
12018 rel->r_addend = toc_addend;
12019 }
12020 r_type = R_PPC64_TPREL16_LO;
12021 rel->r_offset = offset + d_offset;
12022 insn2 = 0x38630000; /* addi 3,3,0 */
12023 }
12024 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12025 /* Zap the reloc on the _tls_get_addr call too. */
12026 BFD_ASSERT (offset == rel[1].r_offset);
12027 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12028 insn3 = bfd_get_32 (output_bfd,
12029 contents + offset + 4);
12030 if (insn3 == NOP
12031 || insn3 == CROR_151515 || insn3 == CROR_313131)
12032 {
12033 rel->r_offset += 4;
12034 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12035 insn2 = NOP;
12036 }
12037 bfd_put_32 (output_bfd, insn2, contents + offset);
12038 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12039 {
12040 rel--;
12041 continue;
12042 }
12043 }
12044 break;
12045
12046 case R_PPC64_TLSLD:
12047 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12048 {
12049 unsigned int insn2, insn3;
12050 bfd_vma offset = rel->r_offset;
12051
12052 if (toc_symndx)
12053 sec = local_sections[toc_symndx];
12054 for (r_symndx = 0;
12055 r_symndx < symtab_hdr->sh_info;
12056 r_symndx++)
12057 if (local_sections[r_symndx] == sec)
12058 break;
12059 if (r_symndx >= symtab_hdr->sh_info)
12060 r_symndx = STN_UNDEF;
12061 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12062 if (r_symndx != STN_UNDEF)
12063 rel->r_addend -= (local_syms[r_symndx].st_value
12064 + sec->output_offset
12065 + sec->output_section->vma);
12066
12067 r_type = R_PPC64_TPREL16_LO;
12068 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12069 rel->r_offset = offset + d_offset;
12070 /* Zap the reloc on the _tls_get_addr call too. */
12071 BFD_ASSERT (offset == rel[1].r_offset);
12072 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12073 insn2 = 0x38630000; /* addi 3,3,0 */
12074 insn3 = bfd_get_32 (output_bfd,
12075 contents + offset + 4);
12076 if (insn3 == NOP
12077 || insn3 == CROR_151515 || insn3 == CROR_313131)
12078 {
12079 rel->r_offset += 4;
12080 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12081 insn2 = NOP;
12082 }
12083 bfd_put_32 (output_bfd, insn2, contents + offset);
12084 rel--;
12085 continue;
12086 }
12087 break;
12088
12089 case R_PPC64_DTPMOD64:
12090 if (rel + 1 < relend
12091 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12092 && rel[1].r_offset == rel->r_offset + 8)
12093 {
12094 if ((tls_mask & TLS_GD) == 0)
12095 {
12096 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12097 if ((tls_mask & TLS_TPRELGD) != 0)
12098 r_type = R_PPC64_TPREL64;
12099 else
12100 {
12101 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12102 r_type = R_PPC64_NONE;
12103 }
12104 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12105 }
12106 }
12107 else
12108 {
12109 if ((tls_mask & TLS_LD) == 0)
12110 {
12111 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12112 r_type = R_PPC64_NONE;
12113 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12114 }
12115 }
12116 break;
12117
12118 case R_PPC64_TPREL64:
12119 if ((tls_mask & TLS_TPREL) == 0)
12120 {
12121 r_type = R_PPC64_NONE;
12122 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12123 }
12124 break;
12125 }
12126
12127 /* Handle other relocations that tweak non-addend part of insn. */
12128 insn = 0;
12129 max_br_offset = 1 << 25;
12130 addend = rel->r_addend;
12131 switch (r_type)
12132 {
12133 default:
12134 break;
12135
12136 /* Branch taken prediction relocations. */
12137 case R_PPC64_ADDR14_BRTAKEN:
12138 case R_PPC64_REL14_BRTAKEN:
12139 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12140 /* Fall thru. */
12141
12142 /* Branch not taken prediction relocations. */
12143 case R_PPC64_ADDR14_BRNTAKEN:
12144 case R_PPC64_REL14_BRNTAKEN:
12145 insn |= bfd_get_32 (output_bfd,
12146 contents + rel->r_offset) & ~(0x01 << 21);
12147 /* Fall thru. */
12148
12149 case R_PPC64_REL14:
12150 max_br_offset = 1 << 15;
12151 /* Fall thru. */
12152
12153 case R_PPC64_REL24:
12154 /* Calls to functions with a different TOC, such as calls to
12155 shared objects, need to alter the TOC pointer. This is
12156 done using a linkage stub. A REL24 branching to these
12157 linkage stubs needs to be followed by a nop, as the nop
12158 will be replaced with an instruction to restore the TOC
12159 base pointer. */
12160 fdh = h;
12161 if (h != NULL
12162 && h->oh != NULL
12163 && h->oh->is_func_descriptor)
12164 fdh = ppc_follow_link (h->oh);
12165 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12166 if (stub_entry != NULL
12167 && (stub_entry->stub_type == ppc_stub_plt_call
12168 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12169 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12170 {
12171 bfd_boolean can_plt_call = FALSE;
12172
12173 if (rel->r_offset + 8 <= input_section->size)
12174 {
12175 unsigned long nop;
12176 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12177 if (nop == NOP
12178 || nop == CROR_151515 || nop == CROR_313131)
12179 {
12180 if (h != NULL
12181 && (h == htab->tls_get_addr_fd
12182 || h == htab->tls_get_addr)
12183 && !htab->no_tls_get_addr_opt)
12184 {
12185 /* Special stub used, leave nop alone. */
12186 }
12187 else
12188 bfd_put_32 (input_bfd, LD_R2_40R1,
12189 contents + rel->r_offset + 4);
12190 can_plt_call = TRUE;
12191 }
12192 }
12193
12194 if (!can_plt_call)
12195 {
12196 if (stub_entry->stub_type == ppc_stub_plt_call)
12197 {
12198 /* If this is a plain branch rather than a branch
12199 and link, don't require a nop. However, don't
12200 allow tail calls in a shared library as they
12201 will result in r2 being corrupted. */
12202 unsigned long br;
12203 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12204 if (info->executable && (br & 1) == 0)
12205 can_plt_call = TRUE;
12206 else
12207 stub_entry = NULL;
12208 }
12209 else if (h != NULL
12210 && strcmp (h->elf.root.root.string,
12211 ".__libc_start_main") == 0)
12212 {
12213 /* Allow crt1 branch to go via a toc adjusting stub. */
12214 can_plt_call = TRUE;
12215 }
12216 else
12217 {
12218 if (strcmp (input_section->output_section->name,
12219 ".init") == 0
12220 || strcmp (input_section->output_section->name,
12221 ".fini") == 0)
12222 (*_bfd_error_handler)
12223 (_("%B(%A+0x%lx): automatic multiple TOCs "
12224 "not supported using your crt files; "
12225 "recompile with -mminimal-toc or upgrade gcc"),
12226 input_bfd,
12227 input_section,
12228 (long) rel->r_offset);
12229 else
12230 (*_bfd_error_handler)
12231 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
12232 "does not allow automatic multiple TOCs; "
12233 "recompile with -mminimal-toc or "
12234 "-fno-optimize-sibling-calls, "
12235 "or make `%s' extern"),
12236 input_bfd,
12237 input_section,
12238 (long) rel->r_offset,
12239 sym_name,
12240 sym_name);
12241 bfd_set_error (bfd_error_bad_value);
12242 ret = FALSE;
12243 }
12244 }
12245
12246 if (can_plt_call
12247 && stub_entry->stub_type == ppc_stub_plt_call)
12248 unresolved_reloc = FALSE;
12249 }
12250
12251 if ((stub_entry == NULL
12252 || stub_entry->stub_type == ppc_stub_long_branch
12253 || stub_entry->stub_type == ppc_stub_plt_branch)
12254 && get_opd_info (sec) != NULL)
12255 {
12256 /* The branch destination is the value of the opd entry. */
12257 bfd_vma off = (relocation + addend
12258 - sec->output_section->vma
12259 - sec->output_offset);
12260 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12261 if (dest != (bfd_vma) -1)
12262 {
12263 relocation = dest;
12264 addend = 0;
12265 }
12266 }
12267
12268 /* If the branch is out of reach we ought to have a long
12269 branch stub. */
12270 from = (rel->r_offset
12271 + input_section->output_offset
12272 + input_section->output_section->vma);
12273
12274 if (stub_entry != NULL
12275 && (stub_entry->stub_type == ppc_stub_long_branch
12276 || stub_entry->stub_type == ppc_stub_plt_branch)
12277 && (r_type == R_PPC64_ADDR14_BRTAKEN
12278 || r_type == R_PPC64_ADDR14_BRNTAKEN
12279 || (relocation + addend - from + max_br_offset
12280 < 2 * max_br_offset)))
12281 /* Don't use the stub if this branch is in range. */
12282 stub_entry = NULL;
12283
12284 if (stub_entry != NULL)
12285 {
12286 /* Munge up the value and addend so that we call the stub
12287 rather than the procedure directly. */
12288 relocation = (stub_entry->stub_offset
12289 + stub_entry->stub_sec->output_offset
12290 + stub_entry->stub_sec->output_section->vma);
12291 addend = 0;
12292 }
12293
12294 if (insn != 0)
12295 {
12296 if (is_power4)
12297 {
12298 /* Set 'a' bit. This is 0b00010 in BO field for branch
12299 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12300 for branch on CTR insns (BO == 1a00t or 1a01t). */
12301 if ((insn & (0x14 << 21)) == (0x04 << 21))
12302 insn |= 0x02 << 21;
12303 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12304 insn |= 0x08 << 21;
12305 else
12306 break;
12307 }
12308 else
12309 {
12310 /* Invert 'y' bit if not the default. */
12311 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12312 insn ^= 0x01 << 21;
12313 }
12314
12315 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12316 }
12317
12318 /* NOP out calls to undefined weak functions.
12319 We can thus call a weak function without first
12320 checking whether the function is defined. */
12321 else if (h != NULL
12322 && h->elf.root.type == bfd_link_hash_undefweak
12323 && h->elf.dynindx == -1
12324 && r_type == R_PPC64_REL24
12325 && relocation == 0
12326 && addend == 0)
12327 {
12328 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12329 continue;
12330 }
12331 break;
12332 }
12333
12334 /* Set `addend'. */
12335 tls_type = 0;
12336 switch (r_type)
12337 {
12338 default:
12339 (*_bfd_error_handler)
12340 (_("%B: unknown relocation type %d for symbol %s"),
12341 input_bfd, (int) r_type, sym_name);
12342
12343 bfd_set_error (bfd_error_bad_value);
12344 ret = FALSE;
12345 continue;
12346
12347 case R_PPC64_NONE:
12348 case R_PPC64_TLS:
12349 case R_PPC64_TLSGD:
12350 case R_PPC64_TLSLD:
12351 case R_PPC64_GNU_VTINHERIT:
12352 case R_PPC64_GNU_VTENTRY:
12353 continue;
12354
12355 /* GOT16 relocations. Like an ADDR16 using the symbol's
12356 address in the GOT as relocation value instead of the
12357 symbol's value itself. Also, create a GOT entry for the
12358 symbol and put the symbol value there. */
12359 case R_PPC64_GOT_TLSGD16:
12360 case R_PPC64_GOT_TLSGD16_LO:
12361 case R_PPC64_GOT_TLSGD16_HI:
12362 case R_PPC64_GOT_TLSGD16_HA:
12363 tls_type = TLS_TLS | TLS_GD;
12364 goto dogot;
12365
12366 case R_PPC64_GOT_TLSLD16:
12367 case R_PPC64_GOT_TLSLD16_LO:
12368 case R_PPC64_GOT_TLSLD16_HI:
12369 case R_PPC64_GOT_TLSLD16_HA:
12370 tls_type = TLS_TLS | TLS_LD;
12371 goto dogot;
12372
12373 case R_PPC64_GOT_TPREL16_DS:
12374 case R_PPC64_GOT_TPREL16_LO_DS:
12375 case R_PPC64_GOT_TPREL16_HI:
12376 case R_PPC64_GOT_TPREL16_HA:
12377 tls_type = TLS_TLS | TLS_TPREL;
12378 goto dogot;
12379
12380 case R_PPC64_GOT_DTPREL16_DS:
12381 case R_PPC64_GOT_DTPREL16_LO_DS:
12382 case R_PPC64_GOT_DTPREL16_HI:
12383 case R_PPC64_GOT_DTPREL16_HA:
12384 tls_type = TLS_TLS | TLS_DTPREL;
12385 goto dogot;
12386
12387 case R_PPC64_GOT16:
12388 case R_PPC64_GOT16_LO:
12389 case R_PPC64_GOT16_HI:
12390 case R_PPC64_GOT16_HA:
12391 case R_PPC64_GOT16_DS:
12392 case R_PPC64_GOT16_LO_DS:
12393 dogot:
12394 {
12395 /* Relocation is to the entry for this symbol in the global
12396 offset table. */
12397 asection *got;
12398 bfd_vma *offp;
12399 bfd_vma off;
12400 unsigned long indx = 0;
12401 struct got_entry *ent;
12402
12403 if (tls_type == (TLS_TLS | TLS_LD)
12404 && (h == NULL
12405 || !h->elf.def_dynamic))
12406 ent = ppc64_tlsld_got (input_bfd);
12407 else
12408 {
12409
12410 if (h != NULL)
12411 {
12412 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12413 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12414 &h->elf)
12415 || (info->shared
12416 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12417 /* This is actually a static link, or it is a
12418 -Bsymbolic link and the symbol is defined
12419 locally, or the symbol was forced to be local
12420 because of a version file. */
12421 ;
12422 else
12423 {
12424 indx = h->elf.dynindx;
12425 unresolved_reloc = FALSE;
12426 }
12427 ent = h->elf.got.glist;
12428 }
12429 else
12430 {
12431 if (local_got_ents == NULL)
12432 abort ();
12433 ent = local_got_ents[r_symndx];
12434 }
12435
12436 for (; ent != NULL; ent = ent->next)
12437 if (ent->addend == orig_addend
12438 && ent->owner == input_bfd
12439 && ent->tls_type == tls_type)
12440 break;
12441 }
12442
12443 if (ent == NULL)
12444 abort ();
12445 if (ent->is_indirect)
12446 ent = ent->got.ent;
12447 offp = &ent->got.offset;
12448 got = ppc64_elf_tdata (ent->owner)->got;
12449 if (got == NULL)
12450 abort ();
12451
12452 /* The offset must always be a multiple of 8. We use the
12453 least significant bit to record whether we have already
12454 processed this entry. */
12455 off = *offp;
12456 if ((off & 1) != 0)
12457 off &= ~1;
12458 else
12459 {
12460 /* Generate relocs for the dynamic linker, except in
12461 the case of TLSLD where we'll use one entry per
12462 module. */
12463 asection *relgot;
12464 bfd_boolean ifunc;
12465
12466 *offp = off | 1;
12467 relgot = NULL;
12468 ifunc = (h != NULL
12469 ? h->elf.type == STT_GNU_IFUNC
12470 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12471 if ((info->shared || indx != 0)
12472 && (h == NULL
12473 || (tls_type == (TLS_TLS | TLS_LD)
12474 && !h->elf.def_dynamic)
12475 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12476 || h->elf.root.type != bfd_link_hash_undefweak))
12477 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12478 else if (ifunc)
12479 relgot = htab->reliplt;
12480 if (relgot != NULL)
12481 {
12482 outrel.r_offset = (got->output_section->vma
12483 + got->output_offset
12484 + off);
12485 outrel.r_addend = addend;
12486 if (tls_type & (TLS_LD | TLS_GD))
12487 {
12488 outrel.r_addend = 0;
12489 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12490 if (tls_type == (TLS_TLS | TLS_GD))
12491 {
12492 loc = relgot->contents;
12493 loc += (relgot->reloc_count++
12494 * sizeof (Elf64_External_Rela));
12495 bfd_elf64_swap_reloca_out (output_bfd,
12496 &outrel, loc);
12497 outrel.r_offset += 8;
12498 outrel.r_addend = addend;
12499 outrel.r_info
12500 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12501 }
12502 }
12503 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12504 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12505 else if (tls_type == (TLS_TLS | TLS_TPREL))
12506 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12507 else if (indx != 0)
12508 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12509 else
12510 {
12511 if (ifunc)
12512 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12513 else
12514 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12515
12516 /* Write the .got section contents for the sake
12517 of prelink. */
12518 loc = got->contents + off;
12519 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12520 loc);
12521 }
12522
12523 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12524 {
12525 outrel.r_addend += relocation;
12526 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12527 outrel.r_addend -= htab->elf.tls_sec->vma;
12528 }
12529 loc = relgot->contents;
12530 loc += (relgot->reloc_count++
12531 * sizeof (Elf64_External_Rela));
12532 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12533 }
12534
12535 /* Init the .got section contents here if we're not
12536 emitting a reloc. */
12537 else
12538 {
12539 relocation += addend;
12540 if (tls_type == (TLS_TLS | TLS_LD))
12541 relocation = 1;
12542 else if (tls_type != 0)
12543 {
12544 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12545 if (tls_type == (TLS_TLS | TLS_TPREL))
12546 relocation += DTP_OFFSET - TP_OFFSET;
12547
12548 if (tls_type == (TLS_TLS | TLS_GD))
12549 {
12550 bfd_put_64 (output_bfd, relocation,
12551 got->contents + off + 8);
12552 relocation = 1;
12553 }
12554 }
12555
12556 bfd_put_64 (output_bfd, relocation,
12557 got->contents + off);
12558 }
12559 }
12560
12561 if (off >= (bfd_vma) -2)
12562 abort ();
12563
12564 relocation = got->output_section->vma + got->output_offset + off;
12565 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12566 }
12567 break;
12568
12569 case R_PPC64_PLT16_HA:
12570 case R_PPC64_PLT16_HI:
12571 case R_PPC64_PLT16_LO:
12572 case R_PPC64_PLT32:
12573 case R_PPC64_PLT64:
12574 /* Relocation is to the entry for this symbol in the
12575 procedure linkage table. */
12576
12577 /* Resolve a PLT reloc against a local symbol directly,
12578 without using the procedure linkage table. */
12579 if (h == NULL)
12580 break;
12581
12582 /* It's possible that we didn't make a PLT entry for this
12583 symbol. This happens when statically linking PIC code,
12584 or when using -Bsymbolic. Go find a match if there is a
12585 PLT entry. */
12586 if (htab->plt != NULL)
12587 {
12588 struct plt_entry *ent;
12589 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12590 if (ent->addend == orig_addend
12591 && ent->plt.offset != (bfd_vma) -1)
12592 {
12593 relocation = (htab->plt->output_section->vma
12594 + htab->plt->output_offset
12595 + ent->plt.offset);
12596 unresolved_reloc = FALSE;
12597 }
12598 }
12599 break;
12600
12601 case R_PPC64_TOC:
12602 /* Relocation value is TOC base. */
12603 relocation = TOCstart;
12604 if (r_symndx == STN_UNDEF)
12605 relocation += htab->stub_group[input_section->id].toc_off;
12606 else if (unresolved_reloc)
12607 ;
12608 else if (sec != NULL && sec->id <= htab->top_id)
12609 relocation += htab->stub_group[sec->id].toc_off;
12610 else
12611 unresolved_reloc = TRUE;
12612 goto dodyn;
12613
12614 /* TOC16 relocs. We want the offset relative to the TOC base,
12615 which is the address of the start of the TOC plus 0x8000.
12616 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12617 in this order. */
12618 case R_PPC64_TOC16:
12619 case R_PPC64_TOC16_LO:
12620 case R_PPC64_TOC16_HI:
12621 case R_PPC64_TOC16_DS:
12622 case R_PPC64_TOC16_LO_DS:
12623 case R_PPC64_TOC16_HA:
12624 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12625 break;
12626
12627 /* Relocate against the beginning of the section. */
12628 case R_PPC64_SECTOFF:
12629 case R_PPC64_SECTOFF_LO:
12630 case R_PPC64_SECTOFF_HI:
12631 case R_PPC64_SECTOFF_DS:
12632 case R_PPC64_SECTOFF_LO_DS:
12633 case R_PPC64_SECTOFF_HA:
12634 if (sec != NULL)
12635 addend -= sec->output_section->vma;
12636 break;
12637
12638 case R_PPC64_REL16:
12639 case R_PPC64_REL16_LO:
12640 case R_PPC64_REL16_HI:
12641 case R_PPC64_REL16_HA:
12642 break;
12643
12644 case R_PPC64_REL14:
12645 case R_PPC64_REL14_BRNTAKEN:
12646 case R_PPC64_REL14_BRTAKEN:
12647 case R_PPC64_REL24:
12648 break;
12649
12650 case R_PPC64_TPREL16:
12651 case R_PPC64_TPREL16_LO:
12652 case R_PPC64_TPREL16_HI:
12653 case R_PPC64_TPREL16_HA:
12654 case R_PPC64_TPREL16_DS:
12655 case R_PPC64_TPREL16_LO_DS:
12656 case R_PPC64_TPREL16_HIGHER:
12657 case R_PPC64_TPREL16_HIGHERA:
12658 case R_PPC64_TPREL16_HIGHEST:
12659 case R_PPC64_TPREL16_HIGHESTA:
12660 if (h != NULL
12661 && h->elf.root.type == bfd_link_hash_undefweak
12662 && h->elf.dynindx == -1)
12663 {
12664 /* Make this relocation against an undefined weak symbol
12665 resolve to zero. This is really just a tweak, since
12666 code using weak externs ought to check that they are
12667 defined before using them. */
12668 bfd_byte *p = contents + rel->r_offset - d_offset;
12669
12670 insn = bfd_get_32 (output_bfd, p);
12671 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12672 if (insn != 0)
12673 bfd_put_32 (output_bfd, insn, p);
12674 break;
12675 }
12676 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12677 if (info->shared)
12678 /* The TPREL16 relocs shouldn't really be used in shared
12679 libs as they will result in DT_TEXTREL being set, but
12680 support them anyway. */
12681 goto dodyn;
12682 break;
12683
12684 case R_PPC64_DTPREL16:
12685 case R_PPC64_DTPREL16_LO:
12686 case R_PPC64_DTPREL16_HI:
12687 case R_PPC64_DTPREL16_HA:
12688 case R_PPC64_DTPREL16_DS:
12689 case R_PPC64_DTPREL16_LO_DS:
12690 case R_PPC64_DTPREL16_HIGHER:
12691 case R_PPC64_DTPREL16_HIGHERA:
12692 case R_PPC64_DTPREL16_HIGHEST:
12693 case R_PPC64_DTPREL16_HIGHESTA:
12694 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12695 break;
12696
12697 case R_PPC64_DTPMOD64:
12698 relocation = 1;
12699 addend = 0;
12700 goto dodyn;
12701
12702 case R_PPC64_TPREL64:
12703 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12704 goto dodyn;
12705
12706 case R_PPC64_DTPREL64:
12707 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12708 /* Fall thru */
12709
12710 /* Relocations that may need to be propagated if this is a
12711 dynamic object. */
12712 case R_PPC64_REL30:
12713 case R_PPC64_REL32:
12714 case R_PPC64_REL64:
12715 case R_PPC64_ADDR14:
12716 case R_PPC64_ADDR14_BRNTAKEN:
12717 case R_PPC64_ADDR14_BRTAKEN:
12718 case R_PPC64_ADDR16:
12719 case R_PPC64_ADDR16_DS:
12720 case R_PPC64_ADDR16_HA:
12721 case R_PPC64_ADDR16_HI:
12722 case R_PPC64_ADDR16_HIGHER:
12723 case R_PPC64_ADDR16_HIGHERA:
12724 case R_PPC64_ADDR16_HIGHEST:
12725 case R_PPC64_ADDR16_HIGHESTA:
12726 case R_PPC64_ADDR16_LO:
12727 case R_PPC64_ADDR16_LO_DS:
12728 case R_PPC64_ADDR24:
12729 case R_PPC64_ADDR32:
12730 case R_PPC64_ADDR64:
12731 case R_PPC64_UADDR16:
12732 case R_PPC64_UADDR32:
12733 case R_PPC64_UADDR64:
12734 dodyn:
12735 if ((input_section->flags & SEC_ALLOC) == 0)
12736 break;
12737
12738 if (NO_OPD_RELOCS && is_opd)
12739 break;
12740
12741 if ((info->shared
12742 && (h == NULL
12743 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12744 || h->elf.root.type != bfd_link_hash_undefweak)
12745 && (must_be_dyn_reloc (info, r_type)
12746 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12747 || (ELIMINATE_COPY_RELOCS
12748 && !info->shared
12749 && h != NULL
12750 && h->elf.dynindx != -1
12751 && !h->elf.non_got_ref
12752 && !h->elf.def_regular)
12753 || (!info->shared
12754 && (h != NULL
12755 ? h->elf.type == STT_GNU_IFUNC
12756 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12757 {
12758 bfd_boolean skip, relocate;
12759 asection *sreloc;
12760 bfd_vma out_off;
12761
12762 /* When generating a dynamic object, these relocations
12763 are copied into the output file to be resolved at run
12764 time. */
12765
12766 skip = FALSE;
12767 relocate = FALSE;
12768
12769 out_off = _bfd_elf_section_offset (output_bfd, info,
12770 input_section, rel->r_offset);
12771 if (out_off == (bfd_vma) -1)
12772 skip = TRUE;
12773 else if (out_off == (bfd_vma) -2)
12774 skip = TRUE, relocate = TRUE;
12775 out_off += (input_section->output_section->vma
12776 + input_section->output_offset);
12777 outrel.r_offset = out_off;
12778 outrel.r_addend = rel->r_addend;
12779
12780 /* Optimize unaligned reloc use. */
12781 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
12782 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
12783 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
12784 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
12785 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
12786 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
12787 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
12788 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
12789 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
12790
12791 if (skip)
12792 memset (&outrel, 0, sizeof outrel);
12793 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
12794 && !is_opd
12795 && r_type != R_PPC64_TOC)
12796 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
12797 else
12798 {
12799 /* This symbol is local, or marked to become local,
12800 or this is an opd section reloc which must point
12801 at a local function. */
12802 outrel.r_addend += relocation;
12803 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12804 {
12805 if (is_opd && h != NULL)
12806 {
12807 /* Lie about opd entries. This case occurs
12808 when building shared libraries and we
12809 reference a function in another shared
12810 lib. The same thing happens for a weak
12811 definition in an application that's
12812 overridden by a strong definition in a
12813 shared lib. (I believe this is a generic
12814 bug in binutils handling of weak syms.)
12815 In these cases we won't use the opd
12816 entry in this lib. */
12817 unresolved_reloc = FALSE;
12818 }
12819 if (!is_opd
12820 && r_type == R_PPC64_ADDR64
12821 && (h != NULL
12822 ? h->elf.type == STT_GNU_IFUNC
12823 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12824 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12825 else
12826 {
12827 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12828
12829 /* We need to relocate .opd contents for ld.so.
12830 Prelink also wants simple and consistent rules
12831 for relocs. This make all RELATIVE relocs have
12832 *r_offset equal to r_addend. */
12833 relocate = TRUE;
12834 }
12835 }
12836 else
12837 {
12838 long indx = 0;
12839
12840 if (h != NULL
12841 ? h->elf.type == STT_GNU_IFUNC
12842 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12843 {
12844 (*_bfd_error_handler)
12845 (_("%B(%A+0x%lx): relocation %s for indirect "
12846 "function %s unsupported"),
12847 input_bfd,
12848 input_section,
12849 (long) rel->r_offset,
12850 ppc64_elf_howto_table[r_type]->name,
12851 sym_name);
12852 ret = FALSE;
12853 }
12854 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
12855 ;
12856 else if (sec == NULL || sec->owner == NULL)
12857 {
12858 bfd_set_error (bfd_error_bad_value);
12859 return FALSE;
12860 }
12861 else
12862 {
12863 asection *osec;
12864
12865 osec = sec->output_section;
12866 indx = elf_section_data (osec)->dynindx;
12867
12868 if (indx == 0)
12869 {
12870 if ((osec->flags & SEC_READONLY) == 0
12871 && htab->elf.data_index_section != NULL)
12872 osec = htab->elf.data_index_section;
12873 else
12874 osec = htab->elf.text_index_section;
12875 indx = elf_section_data (osec)->dynindx;
12876 }
12877 BFD_ASSERT (indx != 0);
12878
12879 /* We are turning this relocation into one
12880 against a section symbol, so subtract out
12881 the output section's address but not the
12882 offset of the input section in the output
12883 section. */
12884 outrel.r_addend -= osec->vma;
12885 }
12886
12887 outrel.r_info = ELF64_R_INFO (indx, r_type);
12888 }
12889 }
12890
12891 sreloc = elf_section_data (input_section)->sreloc;
12892 if (!htab->elf.dynamic_sections_created)
12893 sreloc = htab->reliplt;
12894 if (sreloc == NULL)
12895 abort ();
12896
12897 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12898 >= sreloc->size)
12899 abort ();
12900 loc = sreloc->contents;
12901 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12902 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12903
12904 /* If this reloc is against an external symbol, it will
12905 be computed at runtime, so there's no need to do
12906 anything now. However, for the sake of prelink ensure
12907 that the section contents are a known value. */
12908 if (! relocate)
12909 {
12910 unresolved_reloc = FALSE;
12911 /* The value chosen here is quite arbitrary as ld.so
12912 ignores section contents except for the special
12913 case of .opd where the contents might be accessed
12914 before relocation. Choose zero, as that won't
12915 cause reloc overflow. */
12916 relocation = 0;
12917 addend = 0;
12918 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12919 to improve backward compatibility with older
12920 versions of ld. */
12921 if (r_type == R_PPC64_ADDR64)
12922 addend = outrel.r_addend;
12923 /* Adjust pc_relative relocs to have zero in *r_offset. */
12924 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12925 addend = (input_section->output_section->vma
12926 + input_section->output_offset
12927 + rel->r_offset);
12928 }
12929 }
12930 break;
12931
12932 case R_PPC64_COPY:
12933 case R_PPC64_GLOB_DAT:
12934 case R_PPC64_JMP_SLOT:
12935 case R_PPC64_JMP_IREL:
12936 case R_PPC64_RELATIVE:
12937 /* We shouldn't ever see these dynamic relocs in relocatable
12938 files. */
12939 /* Fall through. */
12940
12941 case R_PPC64_PLTGOT16:
12942 case R_PPC64_PLTGOT16_DS:
12943 case R_PPC64_PLTGOT16_HA:
12944 case R_PPC64_PLTGOT16_HI:
12945 case R_PPC64_PLTGOT16_LO:
12946 case R_PPC64_PLTGOT16_LO_DS:
12947 case R_PPC64_PLTREL32:
12948 case R_PPC64_PLTREL64:
12949 /* These ones haven't been implemented yet. */
12950
12951 (*_bfd_error_handler)
12952 (_("%B: relocation %s is not supported for symbol %s."),
12953 input_bfd,
12954 ppc64_elf_howto_table[r_type]->name, sym_name);
12955
12956 bfd_set_error (bfd_error_invalid_operation);
12957 ret = FALSE;
12958 continue;
12959 }
12960
12961 /* Multi-instruction sequences that access the TOC can be
12962 optimized, eg. addis ra,r2,0; addi rb,ra,x;
12963 to nop; addi rb,r2,x; */
12964 switch (r_type)
12965 {
12966 default:
12967 break;
12968
12969 case R_PPC64_GOT_TLSLD16_HI:
12970 case R_PPC64_GOT_TLSGD16_HI:
12971 case R_PPC64_GOT_TPREL16_HI:
12972 case R_PPC64_GOT_DTPREL16_HI:
12973 case R_PPC64_GOT16_HI:
12974 case R_PPC64_TOC16_HI:
12975 /* These relocs would only be useful if building up an
12976 offset to later add to r2, perhaps in an indexed
12977 addressing mode instruction. Don't try to optimize.
12978 Unfortunately, the possibility of someone building up an
12979 offset like this or even with the HA relocs, means that
12980 we need to check the high insn when optimizing the low
12981 insn. */
12982 break;
12983
12984 case R_PPC64_GOT_TLSLD16_HA:
12985 case R_PPC64_GOT_TLSGD16_HA:
12986 case R_PPC64_GOT_TPREL16_HA:
12987 case R_PPC64_GOT_DTPREL16_HA:
12988 case R_PPC64_GOT16_HA:
12989 case R_PPC64_TOC16_HA:
12990 /* nop is done later. */
12991 break;
12992
12993 case R_PPC64_GOT_TLSLD16_LO:
12994 case R_PPC64_GOT_TLSGD16_LO:
12995 case R_PPC64_GOT_TPREL16_LO_DS:
12996 case R_PPC64_GOT_DTPREL16_LO_DS:
12997 case R_PPC64_GOT16_LO:
12998 case R_PPC64_GOT16_LO_DS:
12999 case R_PPC64_TOC16_LO:
13000 case R_PPC64_TOC16_LO_DS:
13001 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
13002 {
13003 bfd_byte *p = contents + (rel->r_offset & ~3);
13004 insn = bfd_get_32 (input_bfd, p);
13005 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
13006 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
13007 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
13008 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
13009 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
13010 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
13011 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
13012 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
13013 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
13014 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
13015 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
13016 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
13017 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
13018 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
13019 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
13020 && (insn & 3) != 1)
13021 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
13022 && ((insn & 3) == 0 || (insn & 3) == 3)))
13023 {
13024 unsigned int reg = (insn >> 16) & 0x1f;
13025 const Elf_Internal_Rela *ha;
13026 bfd_boolean match_addend;
13027
13028 match_addend = (sym != NULL
13029 && ELF_ST_TYPE (sym->st_info) == STT_SECTION);
13030 ha = ha_reloc_match (relocs, rel, &reg, match_addend,
13031 input_bfd, contents);
13032 if (ha != NULL)
13033 {
13034 insn &= ~(0x1f << 16);
13035 insn |= reg << 16;
13036 bfd_put_32 (input_bfd, insn, p);
13037 if (ha_opt == NULL)
13038 {
13039 ha_opt = bfd_zmalloc (input_section->reloc_count);
13040 if (ha_opt == NULL)
13041 return FALSE;
13042 }
13043 ha_opt[ha - relocs] = 1;
13044 }
13045 else
13046 /* If we don't find a matching high part insn,
13047 something is fishy. Refuse to nop any high
13048 part insn in this section. */
13049 no_ha_opt = TRUE;
13050 }
13051 }
13052 break;
13053 }
13054
13055 /* Do any further special processing. */
13056 switch (r_type)
13057 {
13058 default:
13059 break;
13060
13061 case R_PPC64_ADDR16_HA:
13062 case R_PPC64_REL16_HA:
13063 case R_PPC64_ADDR16_HIGHERA:
13064 case R_PPC64_ADDR16_HIGHESTA:
13065 case R_PPC64_TOC16_HA:
13066 case R_PPC64_SECTOFF_HA:
13067 case R_PPC64_TPREL16_HA:
13068 case R_PPC64_DTPREL16_HA:
13069 case R_PPC64_TPREL16_HIGHER:
13070 case R_PPC64_TPREL16_HIGHERA:
13071 case R_PPC64_TPREL16_HIGHEST:
13072 case R_PPC64_TPREL16_HIGHESTA:
13073 case R_PPC64_DTPREL16_HIGHER:
13074 case R_PPC64_DTPREL16_HIGHERA:
13075 case R_PPC64_DTPREL16_HIGHEST:
13076 case R_PPC64_DTPREL16_HIGHESTA:
13077 /* It's just possible that this symbol is a weak symbol
13078 that's not actually defined anywhere. In that case,
13079 'sec' would be NULL, and we should leave the symbol
13080 alone (it will be set to zero elsewhere in the link). */
13081 if (sec == NULL)
13082 break;
13083 /* Fall thru */
13084
13085 case R_PPC64_GOT16_HA:
13086 case R_PPC64_PLTGOT16_HA:
13087 case R_PPC64_PLT16_HA:
13088 case R_PPC64_GOT_TLSGD16_HA:
13089 case R_PPC64_GOT_TLSLD16_HA:
13090 case R_PPC64_GOT_TPREL16_HA:
13091 case R_PPC64_GOT_DTPREL16_HA:
13092 /* Add 0x10000 if sign bit in 0:15 is set.
13093 Bits 0:15 are not used. */
13094 addend += 0x8000;
13095 break;
13096
13097 case R_PPC64_ADDR16_DS:
13098 case R_PPC64_ADDR16_LO_DS:
13099 case R_PPC64_GOT16_DS:
13100 case R_PPC64_GOT16_LO_DS:
13101 case R_PPC64_PLT16_LO_DS:
13102 case R_PPC64_SECTOFF_DS:
13103 case R_PPC64_SECTOFF_LO_DS:
13104 case R_PPC64_TOC16_DS:
13105 case R_PPC64_TOC16_LO_DS:
13106 case R_PPC64_PLTGOT16_DS:
13107 case R_PPC64_PLTGOT16_LO_DS:
13108 case R_PPC64_GOT_TPREL16_DS:
13109 case R_PPC64_GOT_TPREL16_LO_DS:
13110 case R_PPC64_GOT_DTPREL16_DS:
13111 case R_PPC64_GOT_DTPREL16_LO_DS:
13112 case R_PPC64_TPREL16_DS:
13113 case R_PPC64_TPREL16_LO_DS:
13114 case R_PPC64_DTPREL16_DS:
13115 case R_PPC64_DTPREL16_LO_DS:
13116 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13117 mask = 3;
13118 /* If this reloc is against an lq insn, then the value must be
13119 a multiple of 16. This is somewhat of a hack, but the
13120 "correct" way to do this by defining _DQ forms of all the
13121 _DS relocs bloats all reloc switches in this file. It
13122 doesn't seem to make much sense to use any of these relocs
13123 in data, so testing the insn should be safe. */
13124 if ((insn & (0x3f << 26)) == (56u << 26))
13125 mask = 15;
13126 if (((relocation + addend) & mask) != 0)
13127 {
13128 (*_bfd_error_handler)
13129 (_("%B: error: relocation %s not a multiple of %d"),
13130 input_bfd,
13131 ppc64_elf_howto_table[r_type]->name,
13132 mask + 1);
13133 bfd_set_error (bfd_error_bad_value);
13134 ret = FALSE;
13135 continue;
13136 }
13137 break;
13138 }
13139
13140 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13141 because such sections are not SEC_ALLOC and thus ld.so will
13142 not process them. */
13143 if (unresolved_reloc
13144 && !((input_section->flags & SEC_DEBUGGING) != 0
13145 && h->elf.def_dynamic))
13146 {
13147 (*_bfd_error_handler)
13148 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
13149 input_bfd,
13150 input_section,
13151 (long) rel->r_offset,
13152 ppc64_elf_howto_table[(int) r_type]->name,
13153 h->elf.root.root.string);
13154 ret = FALSE;
13155 }
13156
13157 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13158 input_bfd,
13159 input_section,
13160 contents,
13161 rel->r_offset,
13162 relocation,
13163 addend);
13164
13165 if (r != bfd_reloc_ok)
13166 {
13167 if (sym_name == NULL)
13168 sym_name = "(null)";
13169 if (r == bfd_reloc_overflow)
13170 {
13171 if (warned)
13172 continue;
13173 if (h != NULL
13174 && h->elf.root.type == bfd_link_hash_undefweak
13175 && ppc64_elf_howto_table[r_type]->pc_relative)
13176 {
13177 /* Assume this is a call protected by other code that
13178 detects the symbol is undefined. If this is the case,
13179 we can safely ignore the overflow. If not, the
13180 program is hosed anyway, and a little warning isn't
13181 going to help. */
13182
13183 continue;
13184 }
13185
13186 if (!((*info->callbacks->reloc_overflow)
13187 (info, (h ? &h->elf.root : NULL), sym_name,
13188 ppc64_elf_howto_table[r_type]->name,
13189 orig_addend, input_bfd, input_section, rel->r_offset)))
13190 return FALSE;
13191 }
13192 else
13193 {
13194 (*_bfd_error_handler)
13195 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
13196 input_bfd,
13197 input_section,
13198 (long) rel->r_offset,
13199 ppc64_elf_howto_table[r_type]->name,
13200 sym_name,
13201 (int) r);
13202 ret = FALSE;
13203 }
13204 }
13205 }
13206
13207 if (ha_opt != NULL)
13208 {
13209 if (!no_ha_opt)
13210 {
13211 unsigned char *opt = ha_opt;
13212 rel = relocs;
13213 relend = relocs + input_section->reloc_count;
13214 for (; rel < relend; opt++, rel++)
13215 if (*opt != 0)
13216 {
13217 bfd_byte *p = contents + (rel->r_offset & ~3);
13218 bfd_put_32 (input_bfd, NOP, p);
13219 }
13220 }
13221 free (ha_opt);
13222 }
13223
13224 /* If we're emitting relocations, then shortly after this function
13225 returns, reloc offsets and addends for this section will be
13226 adjusted. Worse, reloc symbol indices will be for the output
13227 file rather than the input. Save a copy of the relocs for
13228 opd_entry_value. */
13229 if (is_opd && (info->emitrelocations || info->relocatable))
13230 {
13231 bfd_size_type amt;
13232 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13233 rel = bfd_alloc (input_bfd, amt);
13234 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13235 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13236 if (rel == NULL)
13237 return FALSE;
13238 memcpy (rel, relocs, amt);
13239 }
13240 return ret;
13241 }
13242
13243 /* Adjust the value of any local symbols in opd sections. */
13244
13245 static int
13246 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13247 const char *name ATTRIBUTE_UNUSED,
13248 Elf_Internal_Sym *elfsym,
13249 asection *input_sec,
13250 struct elf_link_hash_entry *h)
13251 {
13252 struct _opd_sec_data *opd;
13253 long adjust;
13254 bfd_vma value;
13255
13256 if (h != NULL)
13257 return 1;
13258
13259 opd = get_opd_info (input_sec);
13260 if (opd == NULL || opd->adjust == NULL)
13261 return 1;
13262
13263 value = elfsym->st_value - input_sec->output_offset;
13264 if (!info->relocatable)
13265 value -= input_sec->output_section->vma;
13266
13267 adjust = opd->adjust[value / 8];
13268 if (adjust == -1)
13269 return 2;
13270
13271 elfsym->st_value += adjust;
13272 return 1;
13273 }
13274
13275 /* Finish up dynamic symbol handling. We set the contents of various
13276 dynamic sections here. */
13277
13278 static bfd_boolean
13279 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13280 struct bfd_link_info *info,
13281 struct elf_link_hash_entry *h,
13282 Elf_Internal_Sym *sym)
13283 {
13284 struct ppc_link_hash_table *htab;
13285 struct plt_entry *ent;
13286 Elf_Internal_Rela rela;
13287 bfd_byte *loc;
13288
13289 htab = ppc_hash_table (info);
13290 if (htab == NULL)
13291 return FALSE;
13292
13293 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13294 if (ent->plt.offset != (bfd_vma) -1)
13295 {
13296 /* This symbol has an entry in the procedure linkage
13297 table. Set it up. */
13298 if (!htab->elf.dynamic_sections_created
13299 || h->dynindx == -1)
13300 {
13301 BFD_ASSERT (h->type == STT_GNU_IFUNC
13302 && h->def_regular
13303 && (h->root.type == bfd_link_hash_defined
13304 || h->root.type == bfd_link_hash_defweak));
13305 rela.r_offset = (htab->iplt->output_section->vma
13306 + htab->iplt->output_offset
13307 + ent->plt.offset);
13308 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13309 rela.r_addend = (h->root.u.def.value
13310 + h->root.u.def.section->output_offset
13311 + h->root.u.def.section->output_section->vma
13312 + ent->addend);
13313 loc = (htab->reliplt->contents
13314 + (htab->reliplt->reloc_count++
13315 * sizeof (Elf64_External_Rela)));
13316 }
13317 else
13318 {
13319 rela.r_offset = (htab->plt->output_section->vma
13320 + htab->plt->output_offset
13321 + ent->plt.offset);
13322 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13323 rela.r_addend = ent->addend;
13324 loc = (htab->relplt->contents
13325 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13326 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13327 }
13328 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13329 }
13330
13331 if (h->needs_copy)
13332 {
13333 /* This symbol needs a copy reloc. Set it up. */
13334
13335 if (h->dynindx == -1
13336 || (h->root.type != bfd_link_hash_defined
13337 && h->root.type != bfd_link_hash_defweak)
13338 || htab->relbss == NULL)
13339 abort ();
13340
13341 rela.r_offset = (h->root.u.def.value
13342 + h->root.u.def.section->output_section->vma
13343 + h->root.u.def.section->output_offset);
13344 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13345 rela.r_addend = 0;
13346 loc = htab->relbss->contents;
13347 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13348 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13349 }
13350
13351 /* Mark some specially defined symbols as absolute. */
13352 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13353 sym->st_shndx = SHN_ABS;
13354
13355 return TRUE;
13356 }
13357
13358 /* Used to decide how to sort relocs in an optimal manner for the
13359 dynamic linker, before writing them out. */
13360
13361 static enum elf_reloc_type_class
13362 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13363 {
13364 enum elf_ppc64_reloc_type r_type;
13365
13366 r_type = ELF64_R_TYPE (rela->r_info);
13367 switch (r_type)
13368 {
13369 case R_PPC64_RELATIVE:
13370 return reloc_class_relative;
13371 case R_PPC64_JMP_SLOT:
13372 return reloc_class_plt;
13373 case R_PPC64_COPY:
13374 return reloc_class_copy;
13375 default:
13376 return reloc_class_normal;
13377 }
13378 }
13379
13380 /* Finish up the dynamic sections. */
13381
13382 static bfd_boolean
13383 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13384 struct bfd_link_info *info)
13385 {
13386 struct ppc_link_hash_table *htab;
13387 bfd *dynobj;
13388 asection *sdyn;
13389
13390 htab = ppc_hash_table (info);
13391 if (htab == NULL)
13392 return FALSE;
13393
13394 dynobj = htab->elf.dynobj;
13395 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13396
13397 if (htab->elf.dynamic_sections_created)
13398 {
13399 Elf64_External_Dyn *dyncon, *dynconend;
13400
13401 if (sdyn == NULL || htab->got == NULL)
13402 abort ();
13403
13404 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13405 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13406 for (; dyncon < dynconend; dyncon++)
13407 {
13408 Elf_Internal_Dyn dyn;
13409 asection *s;
13410
13411 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13412
13413 switch (dyn.d_tag)
13414 {
13415 default:
13416 continue;
13417
13418 case DT_PPC64_GLINK:
13419 s = htab->glink;
13420 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13421 /* We stupidly defined DT_PPC64_GLINK to be the start
13422 of glink rather than the first entry point, which is
13423 what ld.so needs, and now have a bigger stub to
13424 support automatic multiple TOCs. */
13425 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13426 break;
13427
13428 case DT_PPC64_OPD:
13429 s = bfd_get_section_by_name (output_bfd, ".opd");
13430 if (s == NULL)
13431 continue;
13432 dyn.d_un.d_ptr = s->vma;
13433 break;
13434
13435 case DT_PPC64_OPDSZ:
13436 s = bfd_get_section_by_name (output_bfd, ".opd");
13437 if (s == NULL)
13438 continue;
13439 dyn.d_un.d_val = s->size;
13440 break;
13441
13442 case DT_PLTGOT:
13443 s = htab->plt;
13444 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13445 break;
13446
13447 case DT_JMPREL:
13448 s = htab->relplt;
13449 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13450 break;
13451
13452 case DT_PLTRELSZ:
13453 dyn.d_un.d_val = htab->relplt->size;
13454 break;
13455
13456 case DT_RELASZ:
13457 /* Don't count procedure linkage table relocs in the
13458 overall reloc count. */
13459 s = htab->relplt;
13460 if (s == NULL)
13461 continue;
13462 dyn.d_un.d_val -= s->size;
13463 break;
13464
13465 case DT_RELA:
13466 /* We may not be using the standard ELF linker script.
13467 If .rela.plt is the first .rela section, we adjust
13468 DT_RELA to not include it. */
13469 s = htab->relplt;
13470 if (s == NULL)
13471 continue;
13472 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13473 continue;
13474 dyn.d_un.d_ptr += s->size;
13475 break;
13476 }
13477
13478 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13479 }
13480 }
13481
13482 if (htab->got != NULL && htab->got->size != 0)
13483 {
13484 /* Fill in the first entry in the global offset table.
13485 We use it to hold the link-time TOCbase. */
13486 bfd_put_64 (output_bfd,
13487 elf_gp (output_bfd) + TOC_BASE_OFF,
13488 htab->got->contents);
13489
13490 /* Set .got entry size. */
13491 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13492 }
13493
13494 if (htab->plt != NULL && htab->plt->size != 0)
13495 {
13496 /* Set .plt entry size. */
13497 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13498 = PLT_ENTRY_SIZE;
13499 }
13500
13501 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13502 brlt ourselves if emitrelocations. */
13503 if (htab->brlt != NULL
13504 && htab->brlt->reloc_count != 0
13505 && !_bfd_elf_link_output_relocs (output_bfd,
13506 htab->brlt,
13507 elf_section_data (htab->brlt)->rela.hdr,
13508 elf_section_data (htab->brlt)->relocs,
13509 NULL))
13510 return FALSE;
13511
13512 if (htab->glink != NULL
13513 && htab->glink->reloc_count != 0
13514 && !_bfd_elf_link_output_relocs (output_bfd,
13515 htab->glink,
13516 elf_section_data (htab->glink)->rela.hdr,
13517 elf_section_data (htab->glink)->relocs,
13518 NULL))
13519 return FALSE;
13520
13521 /* We need to handle writing out multiple GOT sections ourselves,
13522 since we didn't add them to DYNOBJ. We know dynobj is the first
13523 bfd. */
13524 while ((dynobj = dynobj->link_next) != NULL)
13525 {
13526 asection *s;
13527
13528 if (!is_ppc64_elf (dynobj))
13529 continue;
13530
13531 s = ppc64_elf_tdata (dynobj)->got;
13532 if (s != NULL
13533 && s->size != 0
13534 && s->output_section != bfd_abs_section_ptr
13535 && !bfd_set_section_contents (output_bfd, s->output_section,
13536 s->contents, s->output_offset,
13537 s->size))
13538 return FALSE;
13539 s = ppc64_elf_tdata (dynobj)->relgot;
13540 if (s != NULL
13541 && s->size != 0
13542 && s->output_section != bfd_abs_section_ptr
13543 && !bfd_set_section_contents (output_bfd, s->output_section,
13544 s->contents, s->output_offset,
13545 s->size))
13546 return FALSE;
13547 }
13548
13549 return TRUE;
13550 }
13551
13552 #include "elf64-target.h"
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