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PR ld/11217
[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010 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_MACHINE_CODE EM_PPC64
65 #define ELF_MAXPAGESIZE 0x10000
66 #define ELF_COMMONPAGESIZE 0x1000
67 #define elf_info_to_howto ppc64_elf_info_to_howto
68
69 #define elf_backend_want_got_sym 0
70 #define elf_backend_want_plt_sym 0
71 #define elf_backend_plt_alignment 3
72 #define elf_backend_plt_not_loaded 1
73 #define elf_backend_got_header_size 8
74 #define elf_backend_can_gc_sections 1
75 #define elf_backend_can_refcount 1
76 #define elf_backend_rela_normal 1
77 #define elf_backend_default_execstack 0
78
79 #define bfd_elf64_mkobject ppc64_elf_mkobject
80 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
81 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
82 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
83 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
84 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
85 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
86 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
87
88 #define elf_backend_object_p ppc64_elf_object_p
89 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
90 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
91 #define elf_backend_write_core_note ppc64_elf_write_core_note
92 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
93 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
94 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
95 #define elf_backend_check_directives ppc64_elf_process_dot_syms
96 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
97 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
98 #define elf_backend_check_relocs ppc64_elf_check_relocs
99 #define elf_backend_gc_keep ppc64_elf_gc_keep
100 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
101 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
102 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
103 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
104 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
105 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
106 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
107 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
108 #define elf_backend_action_discarded ppc64_elf_action_discarded
109 #define elf_backend_relocate_section ppc64_elf_relocate_section
110 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
111 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
112 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
113 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
114 #define elf_backend_special_sections ppc64_elf_special_sections
115 #define elf_backend_post_process_headers _bfd_elf_set_osabi
116
117 /* The name of the dynamic interpreter. This is put in the .interp
118 section. */
119 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
120
121 /* The size in bytes of an entry in the procedure linkage table. */
122 #define PLT_ENTRY_SIZE 24
123
124 /* The initial size of the plt reserved for the dynamic linker. */
125 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
126
127 /* TOC base pointers offset from start of TOC. */
128 #define TOC_BASE_OFF 0x8000
129
130 /* Offset of tp and dtp pointers from start of TLS block. */
131 #define TP_OFFSET 0x7000
132 #define DTP_OFFSET 0x8000
133
134 /* .plt call stub instructions. The normal stub is like this, but
135 sometimes the .plt entry crosses a 64k boundary and we need to
136 insert an addi to adjust r12. */
137 #define PLT_CALL_STUB_SIZE (7*4)
138 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
139 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
140 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
141 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
142 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
143 /* ld %r11,xxx+16@l(%r12) */
144 #define BCTR 0x4e800420 /* bctr */
145
146
147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
148 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
149 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
150 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
151
152 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
153 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
154
155 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
156
157 /* glink call stub instructions. We enter with the index in R0. */
158 #define GLINK_CALL_STUB_SIZE (16*4)
159 /* 0: */
160 /* .quad plt0-1f */
161 /* __glink: */
162 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
163 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
164 /* 1: */
165 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
166 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
167 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
168 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
169 /* ld %11,0(%12) */
170 /* ld %2,8(%12) */
171 /* mtctr %11 */
172 /* ld %11,16(%12) */
173 /* bctr */
174
175 /* Pad with this. */
176 #define NOP 0x60000000
177
178 /* Some other nops. */
179 #define CROR_151515 0x4def7b82
180 #define CROR_313131 0x4ffffb82
181
182 /* .glink entries for the first 32k functions are two instructions. */
183 #define LI_R0_0 0x38000000 /* li %r0,0 */
184 #define B_DOT 0x48000000 /* b . */
185
186 /* After that, we need two instructions to load the index, followed by
187 a branch. */
188 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
189 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
190
191 /* Instructions used by the save and restore reg functions. */
192 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
193 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
194 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
195 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
196 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
197 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
198 #define LI_R12_0 0x39800000 /* li %r12,0 */
199 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
200 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
201 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
202 #define BLR 0x4e800020 /* blr */
203
204 /* Since .opd is an array of descriptors and each entry will end up
205 with identical R_PPC64_RELATIVE relocs, there is really no need to
206 propagate .opd relocs; The dynamic linker should be taught to
207 relocate .opd without reloc entries. */
208 #ifndef NO_OPD_RELOCS
209 #define NO_OPD_RELOCS 0
210 #endif
211 \f
212 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
213
214 /* Relocation HOWTO's. */
215 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
216
217 static reloc_howto_type ppc64_elf_howto_raw[] = {
218 /* This reloc does nothing. */
219 HOWTO (R_PPC64_NONE, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 32, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC64_NONE", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 32 bit relocation. */
234 HOWTO (R_PPC64_ADDR32, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC64_ADDR32", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* An absolute 26 bit branch; the lower two bits must be zero.
249 FIXME: we don't check that, we just clear them. */
250 HOWTO (R_PPC64_ADDR24, /* type */
251 0, /* rightshift */
252 2, /* size (0 = byte, 1 = short, 2 = long) */
253 26, /* bitsize */
254 FALSE, /* pc_relative */
255 0, /* bitpos */
256 complain_overflow_bitfield, /* complain_on_overflow */
257 bfd_elf_generic_reloc, /* special_function */
258 "R_PPC64_ADDR24", /* name */
259 FALSE, /* partial_inplace */
260 0, /* src_mask */
261 0x03fffffc, /* dst_mask */
262 FALSE), /* pcrel_offset */
263
264 /* A standard 16 bit relocation. */
265 HOWTO (R_PPC64_ADDR16, /* type */
266 0, /* rightshift */
267 1, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 FALSE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_bitfield, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC64_ADDR16", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xffff, /* dst_mask */
277 FALSE), /* pcrel_offset */
278
279 /* A 16 bit relocation without overflow. */
280 HOWTO (R_PPC64_ADDR16_LO, /* type */
281 0, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_PPC64_ADDR16_LO", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* Bits 16-31 of an address. */
295 HOWTO (R_PPC64_ADDR16_HI, /* type */
296 16, /* rightshift */
297 1, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_dont, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC64_ADDR16_HI", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xffff, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
310 bits, treated as a signed number, is negative. */
311 HOWTO (R_PPC64_ADDR16_HA, /* type */
312 16, /* rightshift */
313 1, /* size (0 = byte, 1 = short, 2 = long) */
314 16, /* bitsize */
315 FALSE, /* pc_relative */
316 0, /* bitpos */
317 complain_overflow_dont, /* complain_on_overflow */
318 ppc64_elf_ha_reloc, /* special_function */
319 "R_PPC64_ADDR16_HA", /* name */
320 FALSE, /* partial_inplace */
321 0, /* src_mask */
322 0xffff, /* dst_mask */
323 FALSE), /* pcrel_offset */
324
325 /* An absolute 16 bit branch; the lower two bits must be zero.
326 FIXME: we don't check that, we just clear them. */
327 HOWTO (R_PPC64_ADDR14, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 16, /* bitsize */
331 FALSE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield, /* complain_on_overflow */
334 ppc64_elf_branch_reloc, /* special_function */
335 "R_PPC64_ADDR14", /* name */
336 FALSE, /* partial_inplace */
337 0, /* src_mask */
338 0x0000fffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 /* An absolute 16 bit branch, for which bit 10 should be set to
342 indicate that the branch is expected to be taken. The lower two
343 bits must be zero. */
344 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 ppc64_elf_brtaken_reloc, /* special_function */
352 "R_PPC64_ADDR14_BRTAKEN",/* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x0000fffc, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* An absolute 16 bit branch, for which bit 10 should be set to
359 indicate that the branch is not expected to be taken. The lower
360 two bits must be zero. */
361 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
362 0, /* rightshift */
363 2, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 ppc64_elf_brtaken_reloc, /* special_function */
369 "R_PPC64_ADDR14_BRNTAKEN",/* name */
370 FALSE, /* partial_inplace */
371 0, /* src_mask */
372 0x0000fffc, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 /* A relative 26 bit branch; the lower two bits must be zero. */
376 HOWTO (R_PPC64_REL24, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 26, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 ppc64_elf_branch_reloc, /* special_function */
384 "R_PPC64_REL24", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0x03fffffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch; the lower two bits must be zero. */
391 HOWTO (R_PPC64_REL14, /* type */
392 0, /* rightshift */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
394 16, /* bitsize */
395 TRUE, /* pc_relative */
396 0, /* bitpos */
397 complain_overflow_signed, /* complain_on_overflow */
398 ppc64_elf_branch_reloc, /* special_function */
399 "R_PPC64_REL14", /* name */
400 FALSE, /* partial_inplace */
401 0, /* src_mask */
402 0x0000fffc, /* dst_mask */
403 TRUE), /* pcrel_offset */
404
405 /* A relative 16 bit branch. Bit 10 should be set to indicate that
406 the branch is expected to be taken. The lower two bits must be
407 zero. */
408 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
409 0, /* rightshift */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 ppc64_elf_brtaken_reloc, /* special_function */
416 "R_PPC64_REL14_BRTAKEN", /* name */
417 FALSE, /* partial_inplace */
418 0, /* src_mask */
419 0x0000fffc, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 /* A relative 16 bit branch. Bit 10 should be set to indicate that
423 the branch is not expected to be taken. The lower two bits must
424 be zero. */
425 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
426 0, /* rightshift */
427 2, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 TRUE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_signed, /* complain_on_overflow */
432 ppc64_elf_brtaken_reloc, /* special_function */
433 "R_PPC64_REL14_BRNTAKEN",/* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0x0000fffc, /* dst_mask */
437 TRUE), /* pcrel_offset */
438
439 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
440 symbol. */
441 HOWTO (R_PPC64_GOT16, /* type */
442 0, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_signed, /* complain_on_overflow */
448 ppc64_elf_unhandled_reloc, /* special_function */
449 "R_PPC64_GOT16", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC64_GOT16_LO, /* type */
458 0, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc64_elf_unhandled_reloc, /* special_function */
465 "R_PPC64_GOT16_LO", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
472 the symbol. */
473 HOWTO (R_PPC64_GOT16_HI, /* type */
474 16, /* rightshift */
475 1, /* size (0 = byte, 1 = short, 2 = long) */
476 16, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_dont,/* complain_on_overflow */
480 ppc64_elf_unhandled_reloc, /* special_function */
481 "R_PPC64_GOT16_HI", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0xffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
488 the symbol. */
489 HOWTO (R_PPC64_GOT16_HA, /* type */
490 16, /* rightshift */
491 1, /* size (0 = byte, 1 = short, 2 = long) */
492 16, /* bitsize */
493 FALSE, /* pc_relative */
494 0, /* bitpos */
495 complain_overflow_dont,/* complain_on_overflow */
496 ppc64_elf_unhandled_reloc, /* special_function */
497 "R_PPC64_GOT16_HA", /* name */
498 FALSE, /* partial_inplace */
499 0, /* src_mask */
500 0xffff, /* dst_mask */
501 FALSE), /* pcrel_offset */
502
503 /* This is used only by the dynamic linker. The symbol should exist
504 both in the object being run and in some shared library. The
505 dynamic linker copies the data addressed by the symbol from the
506 shared library into the object, because the object being
507 run has to have the data at some particular address. */
508 HOWTO (R_PPC64_COPY, /* type */
509 0, /* rightshift */
510 0, /* this one is variable size */
511 0, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc64_elf_unhandled_reloc, /* special_function */
516 "R_PPC64_COPY", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Like R_PPC64_ADDR64, but used when setting global offset table
523 entries. */
524 HOWTO (R_PPC64_GLOB_DAT, /* type */
525 0, /* rightshift */
526 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
527 64, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc64_elf_unhandled_reloc, /* special_function */
532 "R_PPC64_GLOB_DAT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 ONES (64), /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Created by the link editor. Marks a procedure linkage table
539 entry for a symbol. */
540 HOWTO (R_PPC64_JMP_SLOT, /* type */
541 0, /* rightshift */
542 0, /* size (0 = byte, 1 = short, 2 = long) */
543 0, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc64_elf_unhandled_reloc, /* special_function */
548 "R_PPC64_JMP_SLOT", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Used only by the dynamic linker. When the object is run, this
555 doubleword64 is set to the load address of the object, plus the
556 addend. */
557 HOWTO (R_PPC64_RELATIVE, /* type */
558 0, /* rightshift */
559 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
560 64, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC64_RELATIVE", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 ONES (64), /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* Like R_PPC64_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC64_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_bitfield, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC64_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC64_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC64_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC64_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative. */
602 HOWTO (R_PPC64_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 /* FIXME: Verify. Was complain_overflow_bitfield. */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC64_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table. */
618 HOWTO (R_PPC64_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 ppc64_elf_unhandled_reloc, /* special_function */
626 "R_PPC64_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0xffffffff, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: R_PPC64_PLTREL32 not supported. */
634 HOWTO (R_PPC64_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_signed, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC64_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffffffff, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC64_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc64_elf_unhandled_reloc, /* special_function */
658 "R_PPC64_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC64_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc64_elf_unhandled_reloc, /* special_function */
674 "R_PPC64_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC64_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc64_elf_unhandled_reloc, /* special_function */
690 "R_PPC64_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC64_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 ppc64_elf_sectoff_reloc, /* special_function */
705 "R_PPC64_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* Like R_PPC64_SECTOFF, but no overflow warning. */
712 HOWTO (R_PPC64_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 ppc64_elf_sectoff_reloc, /* special_function */
720 "R_PPC64_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC64_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 ppc64_elf_sectoff_reloc, /* special_function */
735 "R_PPC64_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC64_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_dont, /* complain_on_overflow */
749 ppc64_elf_sectoff_ha_reloc, /* special_function */
750 "R_PPC64_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Like R_PPC64_REL24 without touching the two least significant bits. */
757 HOWTO (R_PPC64_REL30, /* type */
758 2, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 30, /* bitsize */
761 TRUE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC64_REL30", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0xfffffffc, /* dst_mask */
769 TRUE), /* pcrel_offset */
770
771 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
772
773 /* A standard 64-bit relocation. */
774 HOWTO (R_PPC64_ADDR64, /* type */
775 0, /* rightshift */
776 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
777 64, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC64_ADDR64", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 ONES (64), /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The bits 32-47 of an address. */
789 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
790 32, /* rightshift */
791 1, /* size (0 = byte, 1 = short, 2 = long) */
792 16, /* bitsize */
793 FALSE, /* pc_relative */
794 0, /* bitpos */
795 complain_overflow_dont, /* complain_on_overflow */
796 bfd_elf_generic_reloc, /* special_function */
797 "R_PPC64_ADDR16_HIGHER", /* name */
798 FALSE, /* partial_inplace */
799 0, /* src_mask */
800 0xffff, /* dst_mask */
801 FALSE), /* pcrel_offset */
802
803 /* The bits 32-47 of an address, plus 1 if the contents of the low
804 16 bits, treated as a signed number, is negative. */
805 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
806 32, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 ppc64_elf_ha_reloc, /* special_function */
813 "R_PPC64_ADDR16_HIGHERA", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* The bits 48-63 of an address. */
820 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
821 48, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 bfd_elf_generic_reloc, /* special_function */
828 "R_PPC64_ADDR16_HIGHEST", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* The bits 48-63 of an address, plus 1 if the contents of the low
835 16 bits, treated as a signed number, is negative. */
836 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
837 48, /* rightshift */
838 1, /* size (0 = byte, 1 = short, 2 = long) */
839 16, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 ppc64_elf_ha_reloc, /* special_function */
844 "R_PPC64_ADDR16_HIGHESTA", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0xffff, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Like ADDR64, but may be unaligned. */
851 HOWTO (R_PPC64_UADDR64, /* type */
852 0, /* rightshift */
853 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
854 64, /* bitsize */
855 FALSE, /* pc_relative */
856 0, /* bitpos */
857 complain_overflow_dont, /* complain_on_overflow */
858 bfd_elf_generic_reloc, /* special_function */
859 "R_PPC64_UADDR64", /* name */
860 FALSE, /* partial_inplace */
861 0, /* src_mask */
862 ONES (64), /* dst_mask */
863 FALSE), /* pcrel_offset */
864
865 /* 64-bit relative relocation. */
866 HOWTO (R_PPC64_REL64, /* type */
867 0, /* rightshift */
868 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
869 64, /* bitsize */
870 TRUE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 bfd_elf_generic_reloc, /* special_function */
874 "R_PPC64_REL64", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 ONES (64), /* dst_mask */
878 TRUE), /* pcrel_offset */
879
880 /* 64-bit relocation to the symbol's procedure linkage table. */
881 HOWTO (R_PPC64_PLT64, /* type */
882 0, /* rightshift */
883 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
884 64, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_dont, /* complain_on_overflow */
888 ppc64_elf_unhandled_reloc, /* special_function */
889 "R_PPC64_PLT64", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 ONES (64), /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* 64-bit PC relative relocation to the symbol's procedure linkage
896 table. */
897 /* FIXME: R_PPC64_PLTREL64 not supported. */
898 HOWTO (R_PPC64_PLTREL64, /* type */
899 0, /* rightshift */
900 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
901 64, /* bitsize */
902 TRUE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc64_elf_unhandled_reloc, /* special_function */
906 "R_PPC64_PLTREL64", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 ONES (64), /* dst_mask */
910 TRUE), /* pcrel_offset */
911
912 /* 16 bit TOC-relative relocation. */
913
914 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
915 HOWTO (R_PPC64_TOC16, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_signed, /* complain_on_overflow */
922 ppc64_elf_toc_reloc, /* special_function */
923 "R_PPC64_TOC16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* 16 bit TOC-relative relocation without overflow. */
930
931 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
932 HOWTO (R_PPC64_TOC16_LO, /* type */
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc64_elf_toc_reloc, /* special_function */
940 "R_PPC64_TOC16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* 16 bit TOC-relative relocation, high 16 bits. */
947
948 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
949 HOWTO (R_PPC64_TOC16_HI, /* type */
950 16, /* rightshift */
951 1, /* size (0 = byte, 1 = short, 2 = long) */
952 16, /* bitsize */
953 FALSE, /* pc_relative */
954 0, /* bitpos */
955 complain_overflow_dont, /* complain_on_overflow */
956 ppc64_elf_toc_reloc, /* special_function */
957 "R_PPC64_TOC16_HI", /* name */
958 FALSE, /* partial_inplace */
959 0, /* src_mask */
960 0xffff, /* dst_mask */
961 FALSE), /* pcrel_offset */
962
963 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
964 contents of the low 16 bits, treated as a signed number, is
965 negative. */
966
967 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
968 HOWTO (R_PPC64_TOC16_HA, /* type */
969 16, /* rightshift */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
971 16, /* bitsize */
972 FALSE, /* pc_relative */
973 0, /* bitpos */
974 complain_overflow_dont, /* complain_on_overflow */
975 ppc64_elf_toc_ha_reloc, /* special_function */
976 "R_PPC64_TOC16_HA", /* name */
977 FALSE, /* partial_inplace */
978 0, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
981
982 /* 64-bit relocation; insert value of TOC base (.TOC.). */
983
984 /* R_PPC64_TOC 51 doubleword64 .TOC. */
985 HOWTO (R_PPC64_TOC, /* type */
986 0, /* rightshift */
987 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
988 64, /* bitsize */
989 FALSE, /* pc_relative */
990 0, /* bitpos */
991 complain_overflow_bitfield, /* complain_on_overflow */
992 ppc64_elf_toc64_reloc, /* special_function */
993 "R_PPC64_TOC", /* name */
994 FALSE, /* partial_inplace */
995 0, /* src_mask */
996 ONES (64), /* dst_mask */
997 FALSE), /* pcrel_offset */
998
999 /* Like R_PPC64_GOT16, but also informs the link editor that the
1000 value to relocate may (!) refer to a PLT entry which the link
1001 editor (a) may replace with the symbol value. If the link editor
1002 is unable to fully resolve the symbol, it may (b) create a PLT
1003 entry and store the address to the new PLT entry in the GOT.
1004 This permits lazy resolution of function symbols at run time.
1005 The link editor may also skip all of this and just (c) emit a
1006 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1007 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1008 HOWTO (R_PPC64_PLTGOT16, /* type */
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_signed, /* complain_on_overflow */
1015 ppc64_elf_unhandled_reloc, /* special_function */
1016 "R_PPC64_PLTGOT16", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like R_PPC64_PLTGOT16, but without overflow. */
1023 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1024 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1025 0, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc64_elf_unhandled_reloc, /* special_function */
1032 "R_PPC64_PLTGOT16_LO", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1039 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1040 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1041 16, /* rightshift */
1042 1, /* size (0 = byte, 1 = short, 2 = long) */
1043 16, /* bitsize */
1044 FALSE, /* pc_relative */
1045 0, /* bitpos */
1046 complain_overflow_dont, /* complain_on_overflow */
1047 ppc64_elf_unhandled_reloc, /* special_function */
1048 "R_PPC64_PLTGOT16_HI", /* name */
1049 FALSE, /* partial_inplace */
1050 0, /* src_mask */
1051 0xffff, /* dst_mask */
1052 FALSE), /* pcrel_offset */
1053
1054 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1055 1 if the contents of the low 16 bits, treated as a signed number,
1056 is negative. */
1057 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1058 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1059 16, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont,/* complain_on_overflow */
1065 ppc64_elf_unhandled_reloc, /* special_function */
1066 "R_PPC64_PLTGOT16_HA", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1073 HOWTO (R_PPC64_ADDR16_DS, /* type */
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_bitfield, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 "R_PPC64_ADDR16_DS", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xfffc, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1088 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1089 0, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont,/* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 "R_PPC64_ADDR16_LO_DS",/* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xfffc, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1103 HOWTO (R_PPC64_GOT16_DS, /* type */
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc64_elf_unhandled_reloc, /* special_function */
1111 "R_PPC64_GOT16_DS", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xfffc, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1118 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc64_elf_unhandled_reloc, /* special_function */
1126 "R_PPC64_GOT16_LO_DS", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xfffc, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1133 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1134 0, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc64_elf_unhandled_reloc, /* special_function */
1141 "R_PPC64_PLT16_LO_DS", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xfffc, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1148 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1149 0, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_bitfield, /* complain_on_overflow */
1155 ppc64_elf_sectoff_reloc, /* special_function */
1156 "R_PPC64_SECTOFF_DS", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xfffc, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1163 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_dont, /* complain_on_overflow */
1170 ppc64_elf_sectoff_reloc, /* special_function */
1171 "R_PPC64_SECTOFF_LO_DS",/* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xfffc, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1178 HOWTO (R_PPC64_TOC16_DS, /* type */
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_signed, /* complain_on_overflow */
1185 ppc64_elf_toc_reloc, /* special_function */
1186 "R_PPC64_TOC16_DS", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xfffc, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1193 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1194 0, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc64_elf_toc_reloc, /* special_function */
1201 "R_PPC64_TOC16_LO_DS", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xfffc, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1208 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1209 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1210 0, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_signed, /* complain_on_overflow */
1216 ppc64_elf_unhandled_reloc, /* special_function */
1217 "R_PPC64_PLTGOT16_DS", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xfffc, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1224 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1225 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1226 0, /* rightshift */
1227 1, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 FALSE, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 ppc64_elf_unhandled_reloc, /* special_function */
1233 "R_PPC64_PLTGOT16_LO_DS",/* name */
1234 FALSE, /* partial_inplace */
1235 0, /* src_mask */
1236 0xfffc, /* dst_mask */
1237 FALSE), /* pcrel_offset */
1238
1239 /* Marker relocs for TLS. */
1240 HOWTO (R_PPC64_TLS,
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 "R_PPC64_TLS", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 HOWTO (R_PPC64_TLSGD,
1255 0, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 32, /* bitsize */
1258 FALSE, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 "R_PPC64_TLSGD", /* name */
1263 FALSE, /* partial_inplace */
1264 0, /* src_mask */
1265 0, /* dst_mask */
1266 FALSE), /* pcrel_offset */
1267
1268 HOWTO (R_PPC64_TLSLD,
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 32, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC64_TLSLD", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* Computes the load module index of the load module that contains the
1283 definition of its TLS sym. */
1284 HOWTO (R_PPC64_DTPMOD64,
1285 0, /* rightshift */
1286 4, /* size (0 = byte, 1 = short, 2 = long) */
1287 64, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 ppc64_elf_unhandled_reloc, /* special_function */
1292 "R_PPC64_DTPMOD64", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 ONES (64), /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* Computes a dtv-relative displacement, the difference between the value
1299 of sym+add and the base address of the thread-local storage block that
1300 contains the definition of sym, minus 0x8000. */
1301 HOWTO (R_PPC64_DTPREL64,
1302 0, /* rightshift */
1303 4, /* size (0 = byte, 1 = short, 2 = long) */
1304 64, /* bitsize */
1305 FALSE, /* pc_relative */
1306 0, /* bitpos */
1307 complain_overflow_dont, /* complain_on_overflow */
1308 ppc64_elf_unhandled_reloc, /* special_function */
1309 "R_PPC64_DTPREL64", /* name */
1310 FALSE, /* partial_inplace */
1311 0, /* src_mask */
1312 ONES (64), /* dst_mask */
1313 FALSE), /* pcrel_offset */
1314
1315 /* A 16 bit dtprel reloc. */
1316 HOWTO (R_PPC64_DTPREL16,
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 ppc64_elf_unhandled_reloc, /* special_function */
1324 "R_PPC64_DTPREL16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* Like DTPREL16, but no overflow. */
1331 HOWTO (R_PPC64_DTPREL16_LO,
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc64_elf_unhandled_reloc, /* special_function */
1339 "R_PPC64_DTPREL16_LO", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1346 HOWTO (R_PPC64_DTPREL16_HI,
1347 16, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 ppc64_elf_unhandled_reloc, /* special_function */
1354 "R_PPC64_DTPREL16_HI", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1361 HOWTO (R_PPC64_DTPREL16_HA,
1362 16, /* rightshift */
1363 1, /* size (0 = byte, 1 = short, 2 = long) */
1364 16, /* bitsize */
1365 FALSE, /* pc_relative */
1366 0, /* bitpos */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 ppc64_elf_unhandled_reloc, /* special_function */
1369 "R_PPC64_DTPREL16_HA", /* name */
1370 FALSE, /* partial_inplace */
1371 0, /* src_mask */
1372 0xffff, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1374
1375 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1376 HOWTO (R_PPC64_DTPREL16_HIGHER,
1377 32, /* rightshift */
1378 1, /* size (0 = byte, 1 = short, 2 = long) */
1379 16, /* bitsize */
1380 FALSE, /* pc_relative */
1381 0, /* bitpos */
1382 complain_overflow_dont, /* complain_on_overflow */
1383 ppc64_elf_unhandled_reloc, /* special_function */
1384 "R_PPC64_DTPREL16_HIGHER", /* name */
1385 FALSE, /* partial_inplace */
1386 0, /* src_mask */
1387 0xffff, /* dst_mask */
1388 FALSE), /* pcrel_offset */
1389
1390 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1391 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1392 32, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_dont, /* complain_on_overflow */
1398 ppc64_elf_unhandled_reloc, /* special_function */
1399 "R_PPC64_DTPREL16_HIGHERA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1406 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1407 48, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 16, /* bitsize */
1410 FALSE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 ppc64_elf_unhandled_reloc, /* special_function */
1414 "R_PPC64_DTPREL16_HIGHEST", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1419
1420 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1421 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1422 48, /* rightshift */
1423 1, /* size (0 = byte, 1 = short, 2 = long) */
1424 16, /* bitsize */
1425 FALSE, /* pc_relative */
1426 0, /* bitpos */
1427 complain_overflow_dont, /* complain_on_overflow */
1428 ppc64_elf_unhandled_reloc, /* special_function */
1429 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xffff, /* dst_mask */
1433 FALSE), /* pcrel_offset */
1434
1435 /* Like DTPREL16, but for insns with a DS field. */
1436 HOWTO (R_PPC64_DTPREL16_DS,
1437 0, /* rightshift */
1438 1, /* size (0 = byte, 1 = short, 2 = long) */
1439 16, /* bitsize */
1440 FALSE, /* pc_relative */
1441 0, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 ppc64_elf_unhandled_reloc, /* special_function */
1444 "R_PPC64_DTPREL16_DS", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0xfffc, /* dst_mask */
1448 FALSE), /* pcrel_offset */
1449
1450 /* Like DTPREL16_DS, but no overflow. */
1451 HOWTO (R_PPC64_DTPREL16_LO_DS,
1452 0, /* rightshift */
1453 1, /* size (0 = byte, 1 = short, 2 = long) */
1454 16, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_dont, /* complain_on_overflow */
1458 ppc64_elf_unhandled_reloc, /* special_function */
1459 "R_PPC64_DTPREL16_LO_DS", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0xfffc, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* Computes a tp-relative displacement, the difference between the value of
1466 sym+add and the value of the thread pointer (r13). */
1467 HOWTO (R_PPC64_TPREL64,
1468 0, /* rightshift */
1469 4, /* size (0 = byte, 1 = short, 2 = long) */
1470 64, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
1473 complain_overflow_dont, /* complain_on_overflow */
1474 ppc64_elf_unhandled_reloc, /* special_function */
1475 "R_PPC64_TPREL64", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 ONES (64), /* dst_mask */
1479 FALSE), /* pcrel_offset */
1480
1481 /* A 16 bit tprel reloc. */
1482 HOWTO (R_PPC64_TPREL16,
1483 0, /* rightshift */
1484 1, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_signed, /* complain_on_overflow */
1489 ppc64_elf_unhandled_reloc, /* special_function */
1490 "R_PPC64_TPREL16", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* Like TPREL16, but no overflow. */
1497 HOWTO (R_PPC64_TPREL16_LO,
1498 0, /* rightshift */
1499 1, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc64_elf_unhandled_reloc, /* special_function */
1505 "R_PPC64_TPREL16_LO", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Like TPREL16_LO, but next higher group of 16 bits. */
1512 HOWTO (R_PPC64_TPREL16_HI,
1513 16, /* rightshift */
1514 1, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc64_elf_unhandled_reloc, /* special_function */
1520 "R_PPC64_TPREL16_HI", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Like TPREL16_HI, but adjust for low 16 bits. */
1527 HOWTO (R_PPC64_TPREL16_HA,
1528 16, /* rightshift */
1529 1, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc64_elf_unhandled_reloc, /* special_function */
1535 "R_PPC64_TPREL16_HA", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0xffff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Like TPREL16_HI, but next higher group of 16 bits. */
1542 HOWTO (R_PPC64_TPREL16_HIGHER,
1543 32, /* rightshift */
1544 1, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc64_elf_unhandled_reloc, /* special_function */
1550 "R_PPC64_TPREL16_HIGHER", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0xffff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1557 HOWTO (R_PPC64_TPREL16_HIGHERA,
1558 32, /* rightshift */
1559 1, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc64_elf_unhandled_reloc, /* special_function */
1565 "R_PPC64_TPREL16_HIGHERA", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0xffff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1572 HOWTO (R_PPC64_TPREL16_HIGHEST,
1573 48, /* rightshift */
1574 1, /* size (0 = byte, 1 = short, 2 = long) */
1575 16, /* bitsize */
1576 FALSE, /* pc_relative */
1577 0, /* bitpos */
1578 complain_overflow_dont, /* complain_on_overflow */
1579 ppc64_elf_unhandled_reloc, /* special_function */
1580 "R_PPC64_TPREL16_HIGHEST", /* name */
1581 FALSE, /* partial_inplace */
1582 0, /* src_mask */
1583 0xffff, /* dst_mask */
1584 FALSE), /* pcrel_offset */
1585
1586 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1587 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1588 48, /* rightshift */
1589 1, /* size (0 = byte, 1 = short, 2 = long) */
1590 16, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_dont, /* complain_on_overflow */
1594 ppc64_elf_unhandled_reloc, /* special_function */
1595 "R_PPC64_TPREL16_HIGHESTA", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0xffff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Like TPREL16, but for insns with a DS field. */
1602 HOWTO (R_PPC64_TPREL16_DS,
1603 0, /* rightshift */
1604 1, /* size (0 = byte, 1 = short, 2 = long) */
1605 16, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_signed, /* complain_on_overflow */
1609 ppc64_elf_unhandled_reloc, /* special_function */
1610 "R_PPC64_TPREL16_DS", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0xfffc, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Like TPREL16_DS, but no overflow. */
1617 HOWTO (R_PPC64_TPREL16_LO_DS,
1618 0, /* rightshift */
1619 1, /* size (0 = byte, 1 = short, 2 = long) */
1620 16, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_dont, /* complain_on_overflow */
1624 ppc64_elf_unhandled_reloc, /* special_function */
1625 "R_PPC64_TPREL16_LO_DS", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0xfffc, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1632 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1633 to the first entry relative to the TOC base (r2). */
1634 HOWTO (R_PPC64_GOT_TLSGD16,
1635 0, /* rightshift */
1636 1, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_signed, /* complain_on_overflow */
1641 ppc64_elf_unhandled_reloc, /* special_function */
1642 "R_PPC64_GOT_TLSGD16", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0xffff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Like GOT_TLSGD16, but no overflow. */
1649 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1650 0, /* rightshift */
1651 1, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc64_elf_unhandled_reloc, /* special_function */
1657 "R_PPC64_GOT_TLSGD16_LO", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0xffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1664 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1665 16, /* rightshift */
1666 1, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc64_elf_unhandled_reloc, /* special_function */
1672 "R_PPC64_GOT_TLSGD16_HI", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0xffff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1679 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1680 16, /* rightshift */
1681 1, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc64_elf_unhandled_reloc, /* special_function */
1687 "R_PPC64_GOT_TLSGD16_HA", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1694 with values (sym+add)@dtpmod and zero, and computes the offset to the
1695 first entry relative to the TOC base (r2). */
1696 HOWTO (R_PPC64_GOT_TLSLD16,
1697 0, /* rightshift */
1698 1, /* size (0 = byte, 1 = short, 2 = long) */
1699 16, /* bitsize */
1700 FALSE, /* pc_relative */
1701 0, /* bitpos */
1702 complain_overflow_signed, /* complain_on_overflow */
1703 ppc64_elf_unhandled_reloc, /* special_function */
1704 "R_PPC64_GOT_TLSLD16", /* name */
1705 FALSE, /* partial_inplace */
1706 0, /* src_mask */
1707 0xffff, /* dst_mask */
1708 FALSE), /* pcrel_offset */
1709
1710 /* Like GOT_TLSLD16, but no overflow. */
1711 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1712 0, /* rightshift */
1713 1, /* size (0 = byte, 1 = short, 2 = long) */
1714 16, /* bitsize */
1715 FALSE, /* pc_relative */
1716 0, /* bitpos */
1717 complain_overflow_dont, /* complain_on_overflow */
1718 ppc64_elf_unhandled_reloc, /* special_function */
1719 "R_PPC64_GOT_TLSLD16_LO", /* name */
1720 FALSE, /* partial_inplace */
1721 0, /* src_mask */
1722 0xffff, /* dst_mask */
1723 FALSE), /* pcrel_offset */
1724
1725 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1726 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1727 16, /* rightshift */
1728 1, /* size (0 = byte, 1 = short, 2 = long) */
1729 16, /* bitsize */
1730 FALSE, /* pc_relative */
1731 0, /* bitpos */
1732 complain_overflow_dont, /* complain_on_overflow */
1733 ppc64_elf_unhandled_reloc, /* special_function */
1734 "R_PPC64_GOT_TLSLD16_HI", /* name */
1735 FALSE, /* partial_inplace */
1736 0, /* src_mask */
1737 0xffff, /* dst_mask */
1738 FALSE), /* pcrel_offset */
1739
1740 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1741 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1742 16, /* rightshift */
1743 1, /* size (0 = byte, 1 = short, 2 = long) */
1744 16, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 ppc64_elf_unhandled_reloc, /* special_function */
1749 "R_PPC64_GOT_TLSLD16_HA", /* name */
1750 FALSE, /* partial_inplace */
1751 0, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE), /* pcrel_offset */
1754
1755 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1756 the offset to the entry relative to the TOC base (r2). */
1757 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1758 0, /* rightshift */
1759 1, /* size (0 = byte, 1 = short, 2 = long) */
1760 16, /* bitsize */
1761 FALSE, /* pc_relative */
1762 0, /* bitpos */
1763 complain_overflow_signed, /* complain_on_overflow */
1764 ppc64_elf_unhandled_reloc, /* special_function */
1765 "R_PPC64_GOT_DTPREL16_DS", /* name */
1766 FALSE, /* partial_inplace */
1767 0, /* src_mask */
1768 0xfffc, /* dst_mask */
1769 FALSE), /* pcrel_offset */
1770
1771 /* Like GOT_DTPREL16_DS, but no overflow. */
1772 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1773 0, /* rightshift */
1774 1, /* size (0 = byte, 1 = short, 2 = long) */
1775 16, /* bitsize */
1776 FALSE, /* pc_relative */
1777 0, /* bitpos */
1778 complain_overflow_dont, /* complain_on_overflow */
1779 ppc64_elf_unhandled_reloc, /* special_function */
1780 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1781 FALSE, /* partial_inplace */
1782 0, /* src_mask */
1783 0xfffc, /* dst_mask */
1784 FALSE), /* pcrel_offset */
1785
1786 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1787 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1788 16, /* rightshift */
1789 1, /* size (0 = byte, 1 = short, 2 = long) */
1790 16, /* bitsize */
1791 FALSE, /* pc_relative */
1792 0, /* bitpos */
1793 complain_overflow_dont, /* complain_on_overflow */
1794 ppc64_elf_unhandled_reloc, /* special_function */
1795 "R_PPC64_GOT_DTPREL16_HI", /* name */
1796 FALSE, /* partial_inplace */
1797 0, /* src_mask */
1798 0xffff, /* dst_mask */
1799 FALSE), /* pcrel_offset */
1800
1801 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1802 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1803 16, /* rightshift */
1804 1, /* size (0 = byte, 1 = short, 2 = long) */
1805 16, /* bitsize */
1806 FALSE, /* pc_relative */
1807 0, /* bitpos */
1808 complain_overflow_dont, /* complain_on_overflow */
1809 ppc64_elf_unhandled_reloc, /* special_function */
1810 "R_PPC64_GOT_DTPREL16_HA", /* name */
1811 FALSE, /* partial_inplace */
1812 0, /* src_mask */
1813 0xffff, /* dst_mask */
1814 FALSE), /* pcrel_offset */
1815
1816 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1817 offset to the entry relative to the TOC base (r2). */
1818 HOWTO (R_PPC64_GOT_TPREL16_DS,
1819 0, /* rightshift */
1820 1, /* size (0 = byte, 1 = short, 2 = long) */
1821 16, /* bitsize */
1822 FALSE, /* pc_relative */
1823 0, /* bitpos */
1824 complain_overflow_signed, /* complain_on_overflow */
1825 ppc64_elf_unhandled_reloc, /* special_function */
1826 "R_PPC64_GOT_TPREL16_DS", /* name */
1827 FALSE, /* partial_inplace */
1828 0, /* src_mask */
1829 0xfffc, /* dst_mask */
1830 FALSE), /* pcrel_offset */
1831
1832 /* Like GOT_TPREL16_DS, but no overflow. */
1833 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1834 0, /* rightshift */
1835 1, /* size (0 = byte, 1 = short, 2 = long) */
1836 16, /* bitsize */
1837 FALSE, /* pc_relative */
1838 0, /* bitpos */
1839 complain_overflow_dont, /* complain_on_overflow */
1840 ppc64_elf_unhandled_reloc, /* special_function */
1841 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1842 FALSE, /* partial_inplace */
1843 0, /* src_mask */
1844 0xfffc, /* dst_mask */
1845 FALSE), /* pcrel_offset */
1846
1847 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1848 HOWTO (R_PPC64_GOT_TPREL16_HI,
1849 16, /* rightshift */
1850 1, /* size (0 = byte, 1 = short, 2 = long) */
1851 16, /* bitsize */
1852 FALSE, /* pc_relative */
1853 0, /* bitpos */
1854 complain_overflow_dont, /* complain_on_overflow */
1855 ppc64_elf_unhandled_reloc, /* special_function */
1856 "R_PPC64_GOT_TPREL16_HI", /* name */
1857 FALSE, /* partial_inplace */
1858 0, /* src_mask */
1859 0xffff, /* dst_mask */
1860 FALSE), /* pcrel_offset */
1861
1862 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1863 HOWTO (R_PPC64_GOT_TPREL16_HA,
1864 16, /* rightshift */
1865 1, /* size (0 = byte, 1 = short, 2 = long) */
1866 16, /* bitsize */
1867 FALSE, /* pc_relative */
1868 0, /* bitpos */
1869 complain_overflow_dont, /* complain_on_overflow */
1870 ppc64_elf_unhandled_reloc, /* special_function */
1871 "R_PPC64_GOT_TPREL16_HA", /* name */
1872 FALSE, /* partial_inplace */
1873 0, /* src_mask */
1874 0xffff, /* dst_mask */
1875 FALSE), /* pcrel_offset */
1876
1877 HOWTO (R_PPC64_JMP_IREL, /* type */
1878 0, /* rightshift */
1879 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 ppc64_elf_unhandled_reloc, /* special_function */
1885 "R_PPC64_JMP_IREL", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 HOWTO (R_PPC64_IRELATIVE, /* type */
1892 0, /* rightshift */
1893 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1894 64, /* bitsize */
1895 FALSE, /* pc_relative */
1896 0, /* bitpos */
1897 complain_overflow_dont, /* complain_on_overflow */
1898 bfd_elf_generic_reloc, /* special_function */
1899 "R_PPC64_IRELATIVE", /* name */
1900 FALSE, /* partial_inplace */
1901 0, /* src_mask */
1902 ONES (64), /* dst_mask */
1903 FALSE), /* pcrel_offset */
1904
1905 /* A 16 bit relative relocation. */
1906 HOWTO (R_PPC64_REL16, /* type */
1907 0, /* rightshift */
1908 1, /* size (0 = byte, 1 = short, 2 = long) */
1909 16, /* bitsize */
1910 TRUE, /* pc_relative */
1911 0, /* bitpos */
1912 complain_overflow_bitfield, /* complain_on_overflow */
1913 bfd_elf_generic_reloc, /* special_function */
1914 "R_PPC64_REL16", /* name */
1915 FALSE, /* partial_inplace */
1916 0, /* src_mask */
1917 0xffff, /* dst_mask */
1918 TRUE), /* pcrel_offset */
1919
1920 /* A 16 bit relative relocation without overflow. */
1921 HOWTO (R_PPC64_REL16_LO, /* type */
1922 0, /* rightshift */
1923 1, /* size (0 = byte, 1 = short, 2 = long) */
1924 16, /* bitsize */
1925 TRUE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_dont,/* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 "R_PPC64_REL16_LO", /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 0xffff, /* dst_mask */
1933 TRUE), /* pcrel_offset */
1934
1935 /* The high order 16 bits of a relative address. */
1936 HOWTO (R_PPC64_REL16_HI, /* type */
1937 16, /* rightshift */
1938 1, /* size (0 = byte, 1 = short, 2 = long) */
1939 16, /* bitsize */
1940 TRUE, /* pc_relative */
1941 0, /* bitpos */
1942 complain_overflow_dont, /* complain_on_overflow */
1943 bfd_elf_generic_reloc, /* special_function */
1944 "R_PPC64_REL16_HI", /* name */
1945 FALSE, /* partial_inplace */
1946 0, /* src_mask */
1947 0xffff, /* dst_mask */
1948 TRUE), /* pcrel_offset */
1949
1950 /* The high order 16 bits of a relative address, plus 1 if the contents of
1951 the low 16 bits, treated as a signed number, is negative. */
1952 HOWTO (R_PPC64_REL16_HA, /* type */
1953 16, /* rightshift */
1954 1, /* size (0 = byte, 1 = short, 2 = long) */
1955 16, /* bitsize */
1956 TRUE, /* pc_relative */
1957 0, /* bitpos */
1958 complain_overflow_dont, /* complain_on_overflow */
1959 ppc64_elf_ha_reloc, /* special_function */
1960 "R_PPC64_REL16_HA", /* name */
1961 FALSE, /* partial_inplace */
1962 0, /* src_mask */
1963 0xffff, /* dst_mask */
1964 TRUE), /* pcrel_offset */
1965
1966 /* GNU extension to record C++ vtable hierarchy. */
1967 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1968 0, /* rightshift */
1969 0, /* size (0 = byte, 1 = short, 2 = long) */
1970 0, /* bitsize */
1971 FALSE, /* pc_relative */
1972 0, /* bitpos */
1973 complain_overflow_dont, /* complain_on_overflow */
1974 NULL, /* special_function */
1975 "R_PPC64_GNU_VTINHERIT", /* name */
1976 FALSE, /* partial_inplace */
1977 0, /* src_mask */
1978 0, /* dst_mask */
1979 FALSE), /* pcrel_offset */
1980
1981 /* GNU extension to record C++ vtable member usage. */
1982 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1983 0, /* rightshift */
1984 0, /* size (0 = byte, 1 = short, 2 = long) */
1985 0, /* bitsize */
1986 FALSE, /* pc_relative */
1987 0, /* bitpos */
1988 complain_overflow_dont, /* complain_on_overflow */
1989 NULL, /* special_function */
1990 "R_PPC64_GNU_VTENTRY", /* name */
1991 FALSE, /* partial_inplace */
1992 0, /* src_mask */
1993 0, /* dst_mask */
1994 FALSE), /* pcrel_offset */
1995 };
1996
1997 \f
1998 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1999 be done. */
2000
2001 static void
2002 ppc_howto_init (void)
2003 {
2004 unsigned int i, type;
2005
2006 for (i = 0;
2007 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2008 i++)
2009 {
2010 type = ppc64_elf_howto_raw[i].type;
2011 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2012 / sizeof (ppc64_elf_howto_table[0])));
2013 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2014 }
2015 }
2016
2017 static reloc_howto_type *
2018 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2019 bfd_reloc_code_real_type code)
2020 {
2021 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2022
2023 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2024 /* Initialize howto table if needed. */
2025 ppc_howto_init ();
2026
2027 switch (code)
2028 {
2029 default:
2030 return NULL;
2031
2032 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2033 break;
2034 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2035 break;
2036 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2037 break;
2038 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2039 break;
2040 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2041 break;
2042 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2043 break;
2044 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2045 break;
2046 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2047 break;
2048 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2049 break;
2050 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2051 break;
2052 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2053 break;
2054 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2055 break;
2056 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2057 break;
2058 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2059 break;
2060 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2061 break;
2062 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2063 break;
2064 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2065 break;
2066 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2067 break;
2068 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2069 break;
2070 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2071 break;
2072 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2073 break;
2074 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2075 break;
2076 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2077 break;
2078 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2079 break;
2080 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2081 break;
2082 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2083 break;
2084 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2085 break;
2086 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2087 break;
2088 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2089 break;
2090 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2091 break;
2092 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2093 break;
2094 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2095 break;
2096 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2097 break;
2098 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2099 break;
2100 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2101 break;
2102 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2103 break;
2104 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2105 break;
2106 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2107 break;
2108 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2109 break;
2110 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2111 break;
2112 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2113 break;
2114 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2115 break;
2116 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2117 break;
2118 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2119 break;
2120 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2121 break;
2122 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2123 break;
2124 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2125 break;
2126 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2127 break;
2128 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2129 break;
2130 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2131 break;
2132 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2137 break;
2138 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2139 break;
2140 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2141 break;
2142 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2143 break;
2144 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2145 break;
2146 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2147 break;
2148 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2149 break;
2150 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2151 break;
2152 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2153 break;
2154 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2155 break;
2156 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2157 break;
2158 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2159 break;
2160 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2161 break;
2162 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2163 break;
2164 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2165 break;
2166 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2167 break;
2168 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2169 break;
2170 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2171 break;
2172 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2173 break;
2174 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2175 break;
2176 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2177 break;
2178 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2179 break;
2180 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2181 break;
2182 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2183 break;
2184 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2185 break;
2186 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2187 break;
2188 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2189 break;
2190 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2191 break;
2192 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2193 break;
2194 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2195 break;
2196 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2197 break;
2198 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2199 break;
2200 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2201 break;
2202 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2203 break;
2204 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2205 break;
2206 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2207 break;
2208 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2209 break;
2210 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2211 break;
2212 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2213 break;
2214 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2215 break;
2216 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2217 break;
2218 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2219 break;
2220 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2221 break;
2222 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2223 break;
2224 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2225 break;
2226 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2227 break;
2228 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2229 break;
2230 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2231 break;
2232 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2233 break;
2234 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2235 break;
2236 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2237 break;
2238 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2239 break;
2240 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2241 break;
2242 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2243 break;
2244 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2245 break;
2246 }
2247
2248 return ppc64_elf_howto_table[r];
2249 };
2250
2251 static reloc_howto_type *
2252 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2253 const char *r_name)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0;
2258 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2259 i++)
2260 if (ppc64_elf_howto_raw[i].name != NULL
2261 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2262 return &ppc64_elf_howto_raw[i];
2263
2264 return NULL;
2265 }
2266
2267 /* Set the howto pointer for a PowerPC ELF reloc. */
2268
2269 static void
2270 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2271 Elf_Internal_Rela *dst)
2272 {
2273 unsigned int type;
2274
2275 /* Initialize howto table if needed. */
2276 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2277 ppc_howto_init ();
2278
2279 type = ELF64_R_TYPE (dst->r_info);
2280 if (type >= (sizeof (ppc64_elf_howto_table)
2281 / sizeof (ppc64_elf_howto_table[0])))
2282 {
2283 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2284 abfd, (int) type);
2285 type = R_PPC64_NONE;
2286 }
2287 cache_ptr->howto = ppc64_elf_howto_table[type];
2288 }
2289
2290 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2291
2292 static bfd_reloc_status_type
2293 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2294 void *data, asection *input_section,
2295 bfd *output_bfd, char **error_message)
2296 {
2297 /* If this is a relocatable link (output_bfd test tells us), just
2298 call the generic function. Any adjustment will be done at final
2299 link time. */
2300 if (output_bfd != NULL)
2301 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2302 input_section, output_bfd, error_message);
2303
2304 /* Adjust the addend for sign extension of the low 16 bits.
2305 We won't actually be using the low 16 bits, so trashing them
2306 doesn't matter. */
2307 reloc_entry->addend += 0x8000;
2308 return bfd_reloc_continue;
2309 }
2310
2311 static bfd_reloc_status_type
2312 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2313 void *data, asection *input_section,
2314 bfd *output_bfd, char **error_message)
2315 {
2316 if (output_bfd != NULL)
2317 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2318 input_section, output_bfd, error_message);
2319
2320 if (strcmp (symbol->section->name, ".opd") == 0
2321 && (symbol->section->owner->flags & DYNAMIC) == 0)
2322 {
2323 bfd_vma dest = opd_entry_value (symbol->section,
2324 symbol->value + reloc_entry->addend,
2325 NULL, NULL);
2326 if (dest != (bfd_vma) -1)
2327 reloc_entry->addend = dest - (symbol->value
2328 + symbol->section->output_section->vma
2329 + symbol->section->output_offset);
2330 }
2331 return bfd_reloc_continue;
2332 }
2333
2334 static bfd_reloc_status_type
2335 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2336 void *data, asection *input_section,
2337 bfd *output_bfd, char **error_message)
2338 {
2339 long insn;
2340 enum elf_ppc64_reloc_type r_type;
2341 bfd_size_type octets;
2342 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2343 bfd_boolean is_power4 = FALSE;
2344
2345 /* If this is a relocatable link (output_bfd test tells us), just
2346 call the generic function. Any adjustment will be done at final
2347 link time. */
2348 if (output_bfd != NULL)
2349 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2350 input_section, output_bfd, error_message);
2351
2352 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2353 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2354 insn &= ~(0x01 << 21);
2355 r_type = reloc_entry->howto->type;
2356 if (r_type == R_PPC64_ADDR14_BRTAKEN
2357 || r_type == R_PPC64_REL14_BRTAKEN)
2358 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2359
2360 if (is_power4)
2361 {
2362 /* Set 'a' bit. This is 0b00010 in BO field for branch
2363 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2364 for branch on CTR insns (BO == 1a00t or 1a01t). */
2365 if ((insn & (0x14 << 21)) == (0x04 << 21))
2366 insn |= 0x02 << 21;
2367 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2368 insn |= 0x08 << 21;
2369 else
2370 goto out;
2371 }
2372 else
2373 {
2374 bfd_vma target = 0;
2375 bfd_vma from;
2376
2377 if (!bfd_is_com_section (symbol->section))
2378 target = symbol->value;
2379 target += symbol->section->output_section->vma;
2380 target += symbol->section->output_offset;
2381 target += reloc_entry->addend;
2382
2383 from = (reloc_entry->address
2384 + input_section->output_offset
2385 + input_section->output_section->vma);
2386
2387 /* Invert 'y' bit if not the default. */
2388 if ((bfd_signed_vma) (target - from) < 0)
2389 insn ^= 0x01 << 21;
2390 }
2391 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2392 out:
2393 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2394 input_section, output_bfd, error_message);
2395 }
2396
2397 static bfd_reloc_status_type
2398 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2399 void *data, asection *input_section,
2400 bfd *output_bfd, char **error_message)
2401 {
2402 /* If this is a relocatable link (output_bfd test tells us), just
2403 call the generic function. Any adjustment will be done at final
2404 link time. */
2405 if (output_bfd != NULL)
2406 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2407 input_section, output_bfd, error_message);
2408
2409 /* Subtract the symbol section base address. */
2410 reloc_entry->addend -= symbol->section->output_section->vma;
2411 return bfd_reloc_continue;
2412 }
2413
2414 static bfd_reloc_status_type
2415 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2416 void *data, asection *input_section,
2417 bfd *output_bfd, char **error_message)
2418 {
2419 /* If this is a relocatable link (output_bfd test tells us), just
2420 call the generic function. Any adjustment will be done at final
2421 link time. */
2422 if (output_bfd != NULL)
2423 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2424 input_section, output_bfd, error_message);
2425
2426 /* Subtract the symbol section base address. */
2427 reloc_entry->addend -= symbol->section->output_section->vma;
2428
2429 /* Adjust the addend for sign extension of the low 16 bits. */
2430 reloc_entry->addend += 0x8000;
2431 return bfd_reloc_continue;
2432 }
2433
2434 static bfd_reloc_status_type
2435 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2436 void *data, asection *input_section,
2437 bfd *output_bfd, char **error_message)
2438 {
2439 bfd_vma TOCstart;
2440
2441 /* If this is a relocatable link (output_bfd test tells us), just
2442 call the generic function. Any adjustment will be done at final
2443 link time. */
2444 if (output_bfd != NULL)
2445 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2446 input_section, output_bfd, error_message);
2447
2448 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2449 if (TOCstart == 0)
2450 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2451
2452 /* Subtract the TOC base address. */
2453 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2454 return bfd_reloc_continue;
2455 }
2456
2457 static bfd_reloc_status_type
2458 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2459 void *data, asection *input_section,
2460 bfd *output_bfd, char **error_message)
2461 {
2462 bfd_vma TOCstart;
2463
2464 /* If this is a relocatable link (output_bfd test tells us), just
2465 call the generic function. Any adjustment will be done at final
2466 link time. */
2467 if (output_bfd != NULL)
2468 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2469 input_section, output_bfd, error_message);
2470
2471 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2472 if (TOCstart == 0)
2473 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2474
2475 /* Subtract the TOC base address. */
2476 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2477
2478 /* Adjust the addend for sign extension of the low 16 bits. */
2479 reloc_entry->addend += 0x8000;
2480 return bfd_reloc_continue;
2481 }
2482
2483 static bfd_reloc_status_type
2484 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2485 void *data, asection *input_section,
2486 bfd *output_bfd, char **error_message)
2487 {
2488 bfd_vma TOCstart;
2489 bfd_size_type octets;
2490
2491 /* If this is a relocatable link (output_bfd test tells us), just
2492 call the generic function. Any adjustment will be done at final
2493 link time. */
2494 if (output_bfd != NULL)
2495 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2496 input_section, output_bfd, error_message);
2497
2498 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2499 if (TOCstart == 0)
2500 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2501
2502 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2503 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2504 return bfd_reloc_ok;
2505 }
2506
2507 static bfd_reloc_status_type
2508 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2509 void *data, asection *input_section,
2510 bfd *output_bfd, char **error_message)
2511 {
2512 /* If this is a relocatable link (output_bfd test tells us), just
2513 call the generic function. Any adjustment will be done at final
2514 link time. */
2515 if (output_bfd != NULL)
2516 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2517 input_section, output_bfd, error_message);
2518
2519 if (error_message != NULL)
2520 {
2521 static char buf[60];
2522 sprintf (buf, "generic linker can't handle %s",
2523 reloc_entry->howto->name);
2524 *error_message = buf;
2525 }
2526 return bfd_reloc_dangerous;
2527 }
2528
2529 struct ppc64_elf_obj_tdata
2530 {
2531 struct elf_obj_tdata elf;
2532
2533 /* Shortcuts to dynamic linker sections. */
2534 asection *got;
2535 asection *relgot;
2536
2537 /* Used during garbage collection. We attach global symbols defined
2538 on removed .opd entries to this section so that the sym is removed. */
2539 asection *deleted_section;
2540
2541 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2542 sections means we potentially need one of these for each input bfd. */
2543 union {
2544 bfd_signed_vma refcount;
2545 bfd_vma offset;
2546 } tlsld_got;
2547
2548 /* A copy of relocs before they are modified for --emit-relocs. */
2549 Elf_Internal_Rela *opd_relocs;
2550 };
2551
2552 #define ppc64_elf_tdata(bfd) \
2553 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2554
2555 #define ppc64_tlsld_got(bfd) \
2556 (&ppc64_elf_tdata (bfd)->tlsld_got)
2557
2558 #define is_ppc64_elf(bfd) \
2559 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2560 && elf_object_id (bfd) == PPC64_ELF_TDATA)
2561
2562 /* Override the generic function because we store some extras. */
2563
2564 static bfd_boolean
2565 ppc64_elf_mkobject (bfd *abfd)
2566 {
2567 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2568 PPC64_ELF_TDATA);
2569 }
2570
2571 /* Fix bad default arch selected for a 64 bit input bfd when the
2572 default is 32 bit. */
2573
2574 static bfd_boolean
2575 ppc64_elf_object_p (bfd *abfd)
2576 {
2577 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2578 {
2579 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2580
2581 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2582 {
2583 /* Relies on arch after 32 bit default being 64 bit default. */
2584 abfd->arch_info = abfd->arch_info->next;
2585 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2586 }
2587 }
2588 return TRUE;
2589 }
2590
2591 /* Support for core dump NOTE sections. */
2592
2593 static bfd_boolean
2594 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2595 {
2596 size_t offset, size;
2597
2598 if (note->descsz != 504)
2599 return FALSE;
2600
2601 /* pr_cursig */
2602 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2603
2604 /* pr_pid */
2605 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2606
2607 /* pr_reg */
2608 offset = 112;
2609 size = 384;
2610
2611 /* Make a ".reg/999" section. */
2612 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2613 size, note->descpos + offset);
2614 }
2615
2616 static bfd_boolean
2617 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2618 {
2619 if (note->descsz != 136)
2620 return FALSE;
2621
2622 elf_tdata (abfd)->core_program
2623 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2624 elf_tdata (abfd)->core_command
2625 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2626
2627 return TRUE;
2628 }
2629
2630 static char *
2631 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2632 ...)
2633 {
2634 switch (note_type)
2635 {
2636 default:
2637 return NULL;
2638
2639 case NT_PRPSINFO:
2640 {
2641 char data[136];
2642 va_list ap;
2643
2644 va_start (ap, note_type);
2645 memset (data, 0, 40);
2646 strncpy (data + 40, va_arg (ap, const char *), 16);
2647 strncpy (data + 56, va_arg (ap, const char *), 80);
2648 va_end (ap);
2649 return elfcore_write_note (abfd, buf, bufsiz,
2650 "CORE", note_type, data, sizeof (data));
2651 }
2652
2653 case NT_PRSTATUS:
2654 {
2655 char data[504];
2656 va_list ap;
2657 long pid;
2658 int cursig;
2659 const void *greg;
2660
2661 va_start (ap, note_type);
2662 memset (data, 0, 112);
2663 pid = va_arg (ap, long);
2664 bfd_put_32 (abfd, pid, data + 32);
2665 cursig = va_arg (ap, int);
2666 bfd_put_16 (abfd, cursig, data + 12);
2667 greg = va_arg (ap, const void *);
2668 memcpy (data + 112, greg, 384);
2669 memset (data + 496, 0, 8);
2670 va_end (ap);
2671 return elfcore_write_note (abfd, buf, bufsiz,
2672 "CORE", note_type, data, sizeof (data));
2673 }
2674 }
2675 }
2676
2677 /* Merge backend specific data from an object file to the output
2678 object file when linking. */
2679
2680 static bfd_boolean
2681 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2682 {
2683 /* Check if we have the same endianess. */
2684 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2685 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2686 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2687 {
2688 const char *msg;
2689
2690 if (bfd_big_endian (ibfd))
2691 msg = _("%B: compiled for a big endian system "
2692 "and target is little endian");
2693 else
2694 msg = _("%B: compiled for a little endian system "
2695 "and target is big endian");
2696
2697 (*_bfd_error_handler) (msg, ibfd);
2698
2699 bfd_set_error (bfd_error_wrong_format);
2700 return FALSE;
2701 }
2702
2703 return TRUE;
2704 }
2705
2706 /* Add extra PPC sections. */
2707
2708 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2709 {
2710 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2711 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2712 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2713 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2714 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2715 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2716 { NULL, 0, 0, 0, 0 }
2717 };
2718
2719 enum _ppc64_sec_type {
2720 sec_normal = 0,
2721 sec_opd = 1,
2722 sec_toc = 2
2723 };
2724
2725 struct _ppc64_elf_section_data
2726 {
2727 struct bfd_elf_section_data elf;
2728
2729 union
2730 {
2731 /* An array with one entry for each opd function descriptor. */
2732 struct _opd_sec_data
2733 {
2734 /* Points to the function code section for local opd entries. */
2735 asection **func_sec;
2736
2737 /* After editing .opd, adjust references to opd local syms. */
2738 long *adjust;
2739 } opd;
2740
2741 /* An array for toc sections, indexed by offset/8. */
2742 struct _toc_sec_data
2743 {
2744 /* Specifies the relocation symbol index used at a given toc offset. */
2745 unsigned *symndx;
2746
2747 /* And the relocation addend. */
2748 bfd_vma *add;
2749 } toc;
2750 } u;
2751
2752 enum _ppc64_sec_type sec_type:2;
2753
2754 /* Flag set when small branches are detected. Used to
2755 select suitable defaults for the stub group size. */
2756 unsigned int has_14bit_branch:1;
2757 };
2758
2759 #define ppc64_elf_section_data(sec) \
2760 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2761
2762 static bfd_boolean
2763 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2764 {
2765 if (!sec->used_by_bfd)
2766 {
2767 struct _ppc64_elf_section_data *sdata;
2768 bfd_size_type amt = sizeof (*sdata);
2769
2770 sdata = bfd_zalloc (abfd, amt);
2771 if (sdata == NULL)
2772 return FALSE;
2773 sec->used_by_bfd = sdata;
2774 }
2775
2776 return _bfd_elf_new_section_hook (abfd, sec);
2777 }
2778
2779 static struct _opd_sec_data *
2780 get_opd_info (asection * sec)
2781 {
2782 if (sec != NULL
2783 && ppc64_elf_section_data (sec) != NULL
2784 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2785 return &ppc64_elf_section_data (sec)->u.opd;
2786 return NULL;
2787 }
2788 \f
2789 /* Parameters for the qsort hook. */
2790 static bfd_boolean synthetic_relocatable;
2791
2792 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2793
2794 static int
2795 compare_symbols (const void *ap, const void *bp)
2796 {
2797 const asymbol *a = * (const asymbol **) ap;
2798 const asymbol *b = * (const asymbol **) bp;
2799
2800 /* Section symbols first. */
2801 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2802 return -1;
2803 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2804 return 1;
2805
2806 /* then .opd symbols. */
2807 if (strcmp (a->section->name, ".opd") == 0
2808 && strcmp (b->section->name, ".opd") != 0)
2809 return -1;
2810 if (strcmp (a->section->name, ".opd") != 0
2811 && strcmp (b->section->name, ".opd") == 0)
2812 return 1;
2813
2814 /* then other code symbols. */
2815 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2816 == (SEC_CODE | SEC_ALLOC)
2817 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2818 != (SEC_CODE | SEC_ALLOC))
2819 return -1;
2820
2821 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2822 != (SEC_CODE | SEC_ALLOC)
2823 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2824 == (SEC_CODE | SEC_ALLOC))
2825 return 1;
2826
2827 if (synthetic_relocatable)
2828 {
2829 if (a->section->id < b->section->id)
2830 return -1;
2831
2832 if (a->section->id > b->section->id)
2833 return 1;
2834 }
2835
2836 if (a->value + a->section->vma < b->value + b->section->vma)
2837 return -1;
2838
2839 if (a->value + a->section->vma > b->value + b->section->vma)
2840 return 1;
2841
2842 /* For syms with the same value, prefer strong dynamic global function
2843 syms over other syms. */
2844 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2845 return -1;
2846
2847 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2848 return 1;
2849
2850 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2851 return -1;
2852
2853 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2854 return 1;
2855
2856 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2857 return -1;
2858
2859 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2860 return 1;
2861
2862 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2863 return -1;
2864
2865 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2866 return 1;
2867
2868 return 0;
2869 }
2870
2871 /* Search SYMS for a symbol of the given VALUE. */
2872
2873 static asymbol *
2874 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2875 {
2876 long mid;
2877
2878 if (id == -1)
2879 {
2880 while (lo < hi)
2881 {
2882 mid = (lo + hi) >> 1;
2883 if (syms[mid]->value + syms[mid]->section->vma < value)
2884 lo = mid + 1;
2885 else if (syms[mid]->value + syms[mid]->section->vma > value)
2886 hi = mid;
2887 else
2888 return syms[mid];
2889 }
2890 }
2891 else
2892 {
2893 while (lo < hi)
2894 {
2895 mid = (lo + hi) >> 1;
2896 if (syms[mid]->section->id < id)
2897 lo = mid + 1;
2898 else if (syms[mid]->section->id > id)
2899 hi = mid;
2900 else if (syms[mid]->value < value)
2901 lo = mid + 1;
2902 else if (syms[mid]->value > value)
2903 hi = mid;
2904 else
2905 return syms[mid];
2906 }
2907 }
2908 return NULL;
2909 }
2910
2911 static bfd_boolean
2912 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2913 {
2914 bfd_vma vma = *(bfd_vma *) ptr;
2915 return ((section->flags & SEC_ALLOC) != 0
2916 && section->vma <= vma
2917 && vma < section->vma + section->size);
2918 }
2919
2920 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2921 entry syms. Also generate @plt symbols for the glink branch table. */
2922
2923 static long
2924 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2925 long static_count, asymbol **static_syms,
2926 long dyn_count, asymbol **dyn_syms,
2927 asymbol **ret)
2928 {
2929 asymbol *s;
2930 long i;
2931 long count;
2932 char *names;
2933 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2934 asection *opd;
2935 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2936 asymbol **syms;
2937
2938 *ret = NULL;
2939
2940 opd = bfd_get_section_by_name (abfd, ".opd");
2941 if (opd == NULL)
2942 return 0;
2943
2944 symcount = static_count;
2945 if (!relocatable)
2946 symcount += dyn_count;
2947 if (symcount == 0)
2948 return 0;
2949
2950 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2951 if (syms == NULL)
2952 return -1;
2953
2954 if (!relocatable && static_count != 0 && dyn_count != 0)
2955 {
2956 /* Use both symbol tables. */
2957 memcpy (syms, static_syms, static_count * sizeof (*syms));
2958 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2959 }
2960 else if (!relocatable && static_count == 0)
2961 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2962 else
2963 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2964
2965 synthetic_relocatable = relocatable;
2966 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2967
2968 if (!relocatable && symcount > 1)
2969 {
2970 long j;
2971 /* Trim duplicate syms, since we may have merged the normal and
2972 dynamic symbols. Actually, we only care about syms that have
2973 different values, so trim any with the same value. */
2974 for (i = 1, j = 1; i < symcount; ++i)
2975 if (syms[i - 1]->value + syms[i - 1]->section->vma
2976 != syms[i]->value + syms[i]->section->vma)
2977 syms[j++] = syms[i];
2978 symcount = j;
2979 }
2980
2981 i = 0;
2982 if (strcmp (syms[i]->section->name, ".opd") == 0)
2983 ++i;
2984 codesecsym = i;
2985
2986 for (; i < symcount; ++i)
2987 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2988 != (SEC_CODE | SEC_ALLOC))
2989 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2990 break;
2991 codesecsymend = i;
2992
2993 for (; i < symcount; ++i)
2994 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2995 break;
2996 secsymend = i;
2997
2998 for (; i < symcount; ++i)
2999 if (strcmp (syms[i]->section->name, ".opd") != 0)
3000 break;
3001 opdsymend = i;
3002
3003 for (; i < symcount; ++i)
3004 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3005 != (SEC_CODE | SEC_ALLOC))
3006 break;
3007 symcount = i;
3008
3009 count = 0;
3010
3011 if (relocatable)
3012 {
3013 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3014 arelent *r;
3015 size_t size;
3016 long relcount;
3017
3018 if (opdsymend == secsymend)
3019 goto done;
3020
3021 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3022 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3023 if (relcount == 0)
3024 goto done;
3025
3026 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3027 {
3028 count = -1;
3029 goto done;
3030 }
3031
3032 size = 0;
3033 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3034 {
3035 asymbol *sym;
3036
3037 while (r < opd->relocation + relcount
3038 && r->address < syms[i]->value + opd->vma)
3039 ++r;
3040
3041 if (r == opd->relocation + relcount)
3042 break;
3043
3044 if (r->address != syms[i]->value + opd->vma)
3045 continue;
3046
3047 if (r->howto->type != R_PPC64_ADDR64)
3048 continue;
3049
3050 sym = *r->sym_ptr_ptr;
3051 if (!sym_exists_at (syms, opdsymend, symcount,
3052 sym->section->id, sym->value + r->addend))
3053 {
3054 ++count;
3055 size += sizeof (asymbol);
3056 size += strlen (syms[i]->name) + 2;
3057 }
3058 }
3059
3060 s = *ret = bfd_malloc (size);
3061 if (s == NULL)
3062 {
3063 count = -1;
3064 goto done;
3065 }
3066
3067 names = (char *) (s + count);
3068
3069 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3070 {
3071 asymbol *sym;
3072
3073 while (r < opd->relocation + relcount
3074 && r->address < syms[i]->value + opd->vma)
3075 ++r;
3076
3077 if (r == opd->relocation + relcount)
3078 break;
3079
3080 if (r->address != syms[i]->value + opd->vma)
3081 continue;
3082
3083 if (r->howto->type != R_PPC64_ADDR64)
3084 continue;
3085
3086 sym = *r->sym_ptr_ptr;
3087 if (!sym_exists_at (syms, opdsymend, symcount,
3088 sym->section->id, sym->value + r->addend))
3089 {
3090 size_t len;
3091
3092 *s = *syms[i];
3093 s->flags |= BSF_SYNTHETIC;
3094 s->section = sym->section;
3095 s->value = sym->value + r->addend;
3096 s->name = names;
3097 *names++ = '.';
3098 len = strlen (syms[i]->name);
3099 memcpy (names, syms[i]->name, len + 1);
3100 names += len + 1;
3101 /* Have udata.p point back to the original symbol this
3102 synthetic symbol was derived from. */
3103 s->udata.p = syms[i];
3104 s++;
3105 }
3106 }
3107 }
3108 else
3109 {
3110 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3111 bfd_byte *contents;
3112 size_t size;
3113 long plt_count = 0;
3114 bfd_vma glink_vma = 0, resolv_vma = 0;
3115 asection *dynamic, *glink = NULL, *relplt = NULL;
3116 arelent *p;
3117
3118 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3119 {
3120 if (contents)
3121 {
3122 free_contents_and_exit:
3123 free (contents);
3124 }
3125 count = -1;
3126 goto done;
3127 }
3128
3129 size = 0;
3130 for (i = secsymend; i < opdsymend; ++i)
3131 {
3132 bfd_vma ent;
3133
3134 /* Ignore bogus symbols. */
3135 if (syms[i]->value > opd->size - 8)
3136 continue;
3137
3138 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3139 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3140 {
3141 ++count;
3142 size += sizeof (asymbol);
3143 size += strlen (syms[i]->name) + 2;
3144 }
3145 }
3146
3147 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3148 if (dyn_count != 0
3149 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3150 {
3151 bfd_byte *dynbuf, *extdyn, *extdynend;
3152 size_t extdynsize;
3153 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3154
3155 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3156 goto free_contents_and_exit;
3157
3158 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3159 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3160
3161 extdyn = dynbuf;
3162 extdynend = extdyn + dynamic->size;
3163 for (; extdyn < extdynend; extdyn += extdynsize)
3164 {
3165 Elf_Internal_Dyn dyn;
3166 (*swap_dyn_in) (abfd, extdyn, &dyn);
3167
3168 if (dyn.d_tag == DT_NULL)
3169 break;
3170
3171 if (dyn.d_tag == DT_PPC64_GLINK)
3172 {
3173 /* The first glink stub starts at offset 32; see comment in
3174 ppc64_elf_finish_dynamic_sections. */
3175 glink_vma = dyn.d_un.d_val + 32;
3176 /* The .glink section usually does not survive the final
3177 link; search for the section (usually .text) where the
3178 glink stubs now reside. */
3179 glink = bfd_sections_find_if (abfd, section_covers_vma,
3180 &glink_vma);
3181 break;
3182 }
3183 }
3184
3185 free (dynbuf);
3186 }
3187
3188 if (glink != NULL)
3189 {
3190 /* Determine __glink trampoline by reading the relative branch
3191 from the first glink stub. */
3192 bfd_byte buf[4];
3193 if (bfd_get_section_contents (abfd, glink, buf,
3194 glink_vma + 4 - glink->vma, 4))
3195 {
3196 unsigned int insn = bfd_get_32 (abfd, buf);
3197 insn ^= B_DOT;
3198 if ((insn & ~0x3fffffc) == 0)
3199 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3200 }
3201
3202 if (resolv_vma)
3203 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3204
3205 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3206 if (relplt != NULL)
3207 {
3208 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3209 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3210 goto free_contents_and_exit;
3211
3212 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3213 size += plt_count * sizeof (asymbol);
3214
3215 p = relplt->relocation;
3216 for (i = 0; i < plt_count; i++, p++)
3217 {
3218 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3219 if (p->addend != 0)
3220 size += sizeof ("+0x") - 1 + 16;
3221 }
3222 }
3223 }
3224
3225 s = *ret = bfd_malloc (size);
3226 if (s == NULL)
3227 goto free_contents_and_exit;
3228
3229 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3230
3231 for (i = secsymend; i < opdsymend; ++i)
3232 {
3233 bfd_vma ent;
3234
3235 if (syms[i]->value > opd->size - 8)
3236 continue;
3237
3238 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3239 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3240 {
3241 long lo, hi;
3242 size_t len;
3243 asection *sec = abfd->sections;
3244
3245 *s = *syms[i];
3246 lo = codesecsym;
3247 hi = codesecsymend;
3248 while (lo < hi)
3249 {
3250 long mid = (lo + hi) >> 1;
3251 if (syms[mid]->section->vma < ent)
3252 lo = mid + 1;
3253 else if (syms[mid]->section->vma > ent)
3254 hi = mid;
3255 else
3256 {
3257 sec = syms[mid]->section;
3258 break;
3259 }
3260 }
3261
3262 if (lo >= hi && lo > codesecsym)
3263 sec = syms[lo - 1]->section;
3264
3265 for (; sec != NULL; sec = sec->next)
3266 {
3267 if (sec->vma > ent)
3268 break;
3269 if ((sec->flags & SEC_ALLOC) == 0
3270 || (sec->flags & SEC_LOAD) == 0)
3271 break;
3272 if ((sec->flags & SEC_CODE) != 0)
3273 s->section = sec;
3274 }
3275 s->flags |= BSF_SYNTHETIC;
3276 s->value = ent - s->section->vma;
3277 s->name = names;
3278 *names++ = '.';
3279 len = strlen (syms[i]->name);
3280 memcpy (names, syms[i]->name, len + 1);
3281 names += len + 1;
3282 /* Have udata.p point back to the original symbol this
3283 synthetic symbol was derived from. */
3284 s->udata.p = syms[i];
3285 s++;
3286 }
3287 }
3288 free (contents);
3289
3290 if (glink != NULL && relplt != NULL)
3291 {
3292 if (resolv_vma)
3293 {
3294 /* Add a symbol for the main glink trampoline. */
3295 memset (s, 0, sizeof *s);
3296 s->the_bfd = abfd;
3297 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3298 s->section = glink;
3299 s->value = resolv_vma - glink->vma;
3300 s->name = names;
3301 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3302 names += sizeof ("__glink_PLTresolve");
3303 s++;
3304 count++;
3305 }
3306
3307 /* FIXME: It would be very much nicer to put sym@plt on the
3308 stub rather than on the glink branch table entry. The
3309 objdump disassembler would then use a sensible symbol
3310 name on plt calls. The difficulty in doing so is
3311 a) finding the stubs, and,
3312 b) matching stubs against plt entries, and,
3313 c) there can be multiple stubs for a given plt entry.
3314
3315 Solving (a) could be done by code scanning, but older
3316 ppc64 binaries used different stubs to current code.
3317 (b) is the tricky one since you need to known the toc
3318 pointer for at least one function that uses a pic stub to
3319 be able to calculate the plt address referenced.
3320 (c) means gdb would need to set multiple breakpoints (or
3321 find the glink branch itself) when setting breakpoints
3322 for pending shared library loads. */
3323 p = relplt->relocation;
3324 for (i = 0; i < plt_count; i++, p++)
3325 {
3326 size_t len;
3327
3328 *s = **p->sym_ptr_ptr;
3329 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3330 we are defining a symbol, ensure one of them is set. */
3331 if ((s->flags & BSF_LOCAL) == 0)
3332 s->flags |= BSF_GLOBAL;
3333 s->flags |= BSF_SYNTHETIC;
3334 s->section = glink;
3335 s->value = glink_vma - glink->vma;
3336 s->name = names;
3337 s->udata.p = NULL;
3338 len = strlen ((*p->sym_ptr_ptr)->name);
3339 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3340 names += len;
3341 if (p->addend != 0)
3342 {
3343 memcpy (names, "+0x", sizeof ("+0x") - 1);
3344 names += sizeof ("+0x") - 1;
3345 bfd_sprintf_vma (abfd, names, p->addend);
3346 names += strlen (names);
3347 }
3348 memcpy (names, "@plt", sizeof ("@plt"));
3349 names += sizeof ("@plt");
3350 s++;
3351 glink_vma += 8;
3352 if (i >= 0x8000)
3353 glink_vma += 4;
3354 }
3355 count += plt_count;
3356 }
3357 }
3358
3359 done:
3360 free (syms);
3361 return count;
3362 }
3363 \f
3364 /* The following functions are specific to the ELF linker, while
3365 functions above are used generally. Those named ppc64_elf_* are
3366 called by the main ELF linker code. They appear in this file more
3367 or less in the order in which they are called. eg.
3368 ppc64_elf_check_relocs is called early in the link process,
3369 ppc64_elf_finish_dynamic_sections is one of the last functions
3370 called.
3371
3372 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3373 functions have both a function code symbol and a function descriptor
3374 symbol. A call to foo in a relocatable object file looks like:
3375
3376 . .text
3377 . x:
3378 . bl .foo
3379 . nop
3380
3381 The function definition in another object file might be:
3382
3383 . .section .opd
3384 . foo: .quad .foo
3385 . .quad .TOC.@tocbase
3386 . .quad 0
3387 .
3388 . .text
3389 . .foo: blr
3390
3391 When the linker resolves the call during a static link, the branch
3392 unsurprisingly just goes to .foo and the .opd information is unused.
3393 If the function definition is in a shared library, things are a little
3394 different: The call goes via a plt call stub, the opd information gets
3395 copied to the plt, and the linker patches the nop.
3396
3397 . x:
3398 . bl .foo_stub
3399 . ld 2,40(1)
3400 .
3401 .
3402 . .foo_stub:
3403 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3404 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3405 . std 2,40(1) # this is the general idea
3406 . ld 11,0(12)
3407 . ld 2,8(12)
3408 . mtctr 11
3409 . ld 11,16(12)
3410 . bctr
3411 .
3412 . .section .plt
3413 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3414
3415 The "reloc ()" notation is supposed to indicate that the linker emits
3416 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3417 copying.
3418
3419 What are the difficulties here? Well, firstly, the relocations
3420 examined by the linker in check_relocs are against the function code
3421 sym .foo, while the dynamic relocation in the plt is emitted against
3422 the function descriptor symbol, foo. Somewhere along the line, we need
3423 to carefully copy dynamic link information from one symbol to the other.
3424 Secondly, the generic part of the elf linker will make .foo a dynamic
3425 symbol as is normal for most other backends. We need foo dynamic
3426 instead, at least for an application final link. However, when
3427 creating a shared library containing foo, we need to have both symbols
3428 dynamic so that references to .foo are satisfied during the early
3429 stages of linking. Otherwise the linker might decide to pull in a
3430 definition from some other object, eg. a static library.
3431
3432 Update: As of August 2004, we support a new convention. Function
3433 calls may use the function descriptor symbol, ie. "bl foo". This
3434 behaves exactly as "bl .foo". */
3435
3436 /* The linker needs to keep track of the number of relocs that it
3437 decides to copy as dynamic relocs in check_relocs for each symbol.
3438 This is so that it can later discard them if they are found to be
3439 unnecessary. We store the information in a field extending the
3440 regular ELF linker hash table. */
3441
3442 struct ppc_dyn_relocs
3443 {
3444 struct ppc_dyn_relocs *next;
3445
3446 /* The input section of the reloc. */
3447 asection *sec;
3448
3449 /* Total number of relocs copied for the input section. */
3450 bfd_size_type count;
3451
3452 /* Number of pc-relative relocs copied for the input section. */
3453 bfd_size_type pc_count;
3454 };
3455
3456 /* Track GOT entries needed for a given symbol. We might need more
3457 than one got entry per symbol. */
3458 struct got_entry
3459 {
3460 struct got_entry *next;
3461
3462 /* The symbol addend that we'll be placing in the GOT. */
3463 bfd_vma addend;
3464
3465 /* Unlike other ELF targets, we use separate GOT entries for the same
3466 symbol referenced from different input files. This is to support
3467 automatic multiple TOC/GOT sections, where the TOC base can vary
3468 from one input file to another. FIXME: After group_sections we
3469 ought to merge entries within the group.
3470
3471 Point to the BFD owning this GOT entry. */
3472 bfd *owner;
3473
3474 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3475 TLS_TPREL or TLS_DTPREL for tls entries. */
3476 char tls_type;
3477
3478 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3479 union
3480 {
3481 bfd_signed_vma refcount;
3482 bfd_vma offset;
3483 } got;
3484 };
3485
3486 /* The same for PLT. */
3487 struct plt_entry
3488 {
3489 struct plt_entry *next;
3490
3491 bfd_vma addend;
3492
3493 union
3494 {
3495 bfd_signed_vma refcount;
3496 bfd_vma offset;
3497 } plt;
3498 };
3499
3500 /* Of those relocs that might be copied as dynamic relocs, this function
3501 selects those that must be copied when linking a shared library,
3502 even when the symbol is local. */
3503
3504 static int
3505 must_be_dyn_reloc (struct bfd_link_info *info,
3506 enum elf_ppc64_reloc_type r_type)
3507 {
3508 switch (r_type)
3509 {
3510 default:
3511 return 1;
3512
3513 case R_PPC64_REL32:
3514 case R_PPC64_REL64:
3515 case R_PPC64_REL30:
3516 return 0;
3517
3518 case R_PPC64_TPREL16:
3519 case R_PPC64_TPREL16_LO:
3520 case R_PPC64_TPREL16_HI:
3521 case R_PPC64_TPREL16_HA:
3522 case R_PPC64_TPREL16_DS:
3523 case R_PPC64_TPREL16_LO_DS:
3524 case R_PPC64_TPREL16_HIGHER:
3525 case R_PPC64_TPREL16_HIGHERA:
3526 case R_PPC64_TPREL16_HIGHEST:
3527 case R_PPC64_TPREL16_HIGHESTA:
3528 case R_PPC64_TPREL64:
3529 return !info->executable;
3530 }
3531 }
3532
3533 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3534 copying dynamic variables from a shared lib into an app's dynbss
3535 section, and instead use a dynamic relocation to point into the
3536 shared lib. With code that gcc generates, it's vital that this be
3537 enabled; In the PowerPC64 ABI, the address of a function is actually
3538 the address of a function descriptor, which resides in the .opd
3539 section. gcc uses the descriptor directly rather than going via the
3540 GOT as some other ABI's do, which means that initialized function
3541 pointers must reference the descriptor. Thus, a function pointer
3542 initialized to the address of a function in a shared library will
3543 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3544 redefines the function descriptor symbol to point to the copy. This
3545 presents a problem as a plt entry for that function is also
3546 initialized from the function descriptor symbol and the copy reloc
3547 may not be initialized first. */
3548 #define ELIMINATE_COPY_RELOCS 1
3549
3550 /* Section name for stubs is the associated section name plus this
3551 string. */
3552 #define STUB_SUFFIX ".stub"
3553
3554 /* Linker stubs.
3555 ppc_stub_long_branch:
3556 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3557 destination, but a 24 bit branch in a stub section will reach.
3558 . b dest
3559
3560 ppc_stub_plt_branch:
3561 Similar to the above, but a 24 bit branch in the stub section won't
3562 reach its destination.
3563 . addis %r12,%r2,xxx@toc@ha
3564 . ld %r11,xxx@toc@l(%r12)
3565 . mtctr %r11
3566 . bctr
3567
3568 ppc_stub_plt_call:
3569 Used to call a function in a shared library. If it so happens that
3570 the plt entry referenced crosses a 64k boundary, then an extra
3571 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3572 . addis %r12,%r2,xxx@toc@ha
3573 . std %r2,40(%r1)
3574 . ld %r11,xxx+0@toc@l(%r12)
3575 . mtctr %r11
3576 . ld %r2,xxx+8@toc@l(%r12)
3577 . ld %r11,xxx+16@toc@l(%r12)
3578 . bctr
3579
3580 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3581 code to adjust the value and save r2 to support multiple toc sections.
3582 A ppc_stub_long_branch with an r2 offset looks like:
3583 . std %r2,40(%r1)
3584 . addis %r2,%r2,off@ha
3585 . addi %r2,%r2,off@l
3586 . b dest
3587
3588 A ppc_stub_plt_branch with an r2 offset looks like:
3589 . std %r2,40(%r1)
3590 . addis %r12,%r2,xxx@toc@ha
3591 . ld %r11,xxx@toc@l(%r12)
3592 . addis %r2,%r2,off@ha
3593 . addi %r2,%r2,off@l
3594 . mtctr %r11
3595 . bctr
3596
3597 In cases where the "addis" instruction would add zero, the "addis" is
3598 omitted and following instructions modified slightly in some cases.
3599 */
3600
3601 enum ppc_stub_type {
3602 ppc_stub_none,
3603 ppc_stub_long_branch,
3604 ppc_stub_long_branch_r2off,
3605 ppc_stub_plt_branch,
3606 ppc_stub_plt_branch_r2off,
3607 ppc_stub_plt_call
3608 };
3609
3610 struct ppc_stub_hash_entry {
3611
3612 /* Base hash table entry structure. */
3613 struct bfd_hash_entry root;
3614
3615 enum ppc_stub_type stub_type;
3616
3617 /* The stub section. */
3618 asection *stub_sec;
3619
3620 /* Offset within stub_sec of the beginning of this stub. */
3621 bfd_vma stub_offset;
3622
3623 /* Given the symbol's value and its section we can determine its final
3624 value when building the stubs (so the stub knows where to jump. */
3625 bfd_vma target_value;
3626 asection *target_section;
3627
3628 /* The symbol table entry, if any, that this was derived from. */
3629 struct ppc_link_hash_entry *h;
3630 struct plt_entry *plt_ent;
3631
3632 /* And the reloc addend that this was derived from. */
3633 bfd_vma addend;
3634
3635 /* Where this stub is being called from, or, in the case of combined
3636 stub sections, the first input section in the group. */
3637 asection *id_sec;
3638 };
3639
3640 struct ppc_branch_hash_entry {
3641
3642 /* Base hash table entry structure. */
3643 struct bfd_hash_entry root;
3644
3645 /* Offset within branch lookup table. */
3646 unsigned int offset;
3647
3648 /* Generation marker. */
3649 unsigned int iter;
3650 };
3651
3652 struct ppc_link_hash_entry
3653 {
3654 struct elf_link_hash_entry elf;
3655
3656 union {
3657 /* A pointer to the most recently used stub hash entry against this
3658 symbol. */
3659 struct ppc_stub_hash_entry *stub_cache;
3660
3661 /* A pointer to the next symbol starting with a '.' */
3662 struct ppc_link_hash_entry *next_dot_sym;
3663 } u;
3664
3665 /* Track dynamic relocs copied for this symbol. */
3666 struct ppc_dyn_relocs *dyn_relocs;
3667
3668 /* Link between function code and descriptor symbols. */
3669 struct ppc_link_hash_entry *oh;
3670
3671 /* Flag function code and descriptor symbols. */
3672 unsigned int is_func:1;
3673 unsigned int is_func_descriptor:1;
3674 unsigned int fake:1;
3675
3676 /* Whether global opd/toc sym has been adjusted or not.
3677 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3678 should be set for all globals defined in any opd/toc section. */
3679 unsigned int adjust_done:1;
3680
3681 /* Set if we twiddled this symbol to weak at some stage. */
3682 unsigned int was_undefined:1;
3683
3684 /* Contexts in which symbol is used in the GOT (or TOC).
3685 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3686 corresponding relocs are encountered during check_relocs.
3687 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3688 indicate the corresponding GOT entry type is not needed.
3689 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3690 a TPREL one. We use a separate flag rather than setting TPREL
3691 just for convenience in distinguishing the two cases. */
3692 #define TLS_GD 1 /* GD reloc. */
3693 #define TLS_LD 2 /* LD reloc. */
3694 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3695 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3696 #define TLS_TLS 16 /* Any TLS reloc. */
3697 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3698 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3699 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3700 char tls_mask;
3701 };
3702
3703 /* ppc64 ELF linker hash table. */
3704
3705 struct ppc_link_hash_table
3706 {
3707 struct elf_link_hash_table elf;
3708
3709 /* The stub hash table. */
3710 struct bfd_hash_table stub_hash_table;
3711
3712 /* Another hash table for plt_branch stubs. */
3713 struct bfd_hash_table branch_hash_table;
3714
3715 /* Linker stub bfd. */
3716 bfd *stub_bfd;
3717
3718 /* Linker call-backs. */
3719 asection * (*add_stub_section) (const char *, asection *);
3720 void (*layout_sections_again) (void);
3721
3722 /* Array to keep track of which stub sections have been created, and
3723 information on stub grouping. */
3724 struct map_stub {
3725 /* This is the section to which stubs in the group will be attached. */
3726 asection *link_sec;
3727 /* The stub section. */
3728 asection *stub_sec;
3729 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3730 bfd_vma toc_off;
3731 } *stub_group;
3732
3733 /* Temp used when calculating TOC pointers. */
3734 bfd_vma toc_curr;
3735 bfd *toc_bfd;
3736 asection *toc_first_sec;
3737
3738 /* Highest input section id. */
3739 int top_id;
3740
3741 /* Highest output section index. */
3742 int top_index;
3743
3744 /* Used when adding symbols. */
3745 struct ppc_link_hash_entry *dot_syms;
3746
3747 /* List of input sections for each output section. */
3748 asection **input_list;
3749
3750 /* Short-cuts to get to dynamic linker sections. */
3751 asection *got;
3752 asection *plt;
3753 asection *relplt;
3754 asection *iplt;
3755 asection *reliplt;
3756 asection *dynbss;
3757 asection *relbss;
3758 asection *glink;
3759 asection *sfpr;
3760 asection *brlt;
3761 asection *relbrlt;
3762
3763 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3764 struct ppc_link_hash_entry *tls_get_addr;
3765 struct ppc_link_hash_entry *tls_get_addr_fd;
3766
3767 /* Statistics. */
3768 unsigned long stub_count[ppc_stub_plt_call];
3769
3770 /* Number of stubs against global syms. */
3771 unsigned long stub_globals;
3772
3773 /* Set if we should emit symbols for stubs. */
3774 unsigned int emit_stub_syms:1;
3775
3776 /* Set if __tls_get_addr optimization should not be done. */
3777 unsigned int no_tls_get_addr_opt:1;
3778
3779 /* Support for multiple toc sections. */
3780 unsigned int no_multi_toc:1;
3781 unsigned int multi_toc_needed:1;
3782
3783 /* Set on error. */
3784 unsigned int stub_error:1;
3785
3786 /* Temp used by ppc64_elf_process_dot_syms. */
3787 unsigned int twiddled_syms:1;
3788
3789 /* Incremented every time we size stubs. */
3790 unsigned int stub_iteration;
3791
3792 /* Small local sym cache. */
3793 struct sym_cache sym_cache;
3794 };
3795
3796 /* Rename some of the generic section flags to better document how they
3797 are used here. */
3798 #define has_toc_reloc has_gp_reloc
3799 #define makes_toc_func_call need_finalize_relax
3800 #define call_check_in_progress reloc_done
3801
3802 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3803
3804 #define ppc_hash_table(p) \
3805 ((struct ppc_link_hash_table *) ((p)->hash))
3806
3807 #define ppc_stub_hash_lookup(table, string, create, copy) \
3808 ((struct ppc_stub_hash_entry *) \
3809 bfd_hash_lookup ((table), (string), (create), (copy)))
3810
3811 #define ppc_branch_hash_lookup(table, string, create, copy) \
3812 ((struct ppc_branch_hash_entry *) \
3813 bfd_hash_lookup ((table), (string), (create), (copy)))
3814
3815 /* Create an entry in the stub hash table. */
3816
3817 static struct bfd_hash_entry *
3818 stub_hash_newfunc (struct bfd_hash_entry *entry,
3819 struct bfd_hash_table *table,
3820 const char *string)
3821 {
3822 /* Allocate the structure if it has not already been allocated by a
3823 subclass. */
3824 if (entry == NULL)
3825 {
3826 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3827 if (entry == NULL)
3828 return entry;
3829 }
3830
3831 /* Call the allocation method of the superclass. */
3832 entry = bfd_hash_newfunc (entry, table, string);
3833 if (entry != NULL)
3834 {
3835 struct ppc_stub_hash_entry *eh;
3836
3837 /* Initialize the local fields. */
3838 eh = (struct ppc_stub_hash_entry *) entry;
3839 eh->stub_type = ppc_stub_none;
3840 eh->stub_sec = NULL;
3841 eh->stub_offset = 0;
3842 eh->target_value = 0;
3843 eh->target_section = NULL;
3844 eh->h = NULL;
3845 eh->id_sec = NULL;
3846 }
3847
3848 return entry;
3849 }
3850
3851 /* Create an entry in the branch hash table. */
3852
3853 static struct bfd_hash_entry *
3854 branch_hash_newfunc (struct bfd_hash_entry *entry,
3855 struct bfd_hash_table *table,
3856 const char *string)
3857 {
3858 /* Allocate the structure if it has not already been allocated by a
3859 subclass. */
3860 if (entry == NULL)
3861 {
3862 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3863 if (entry == NULL)
3864 return entry;
3865 }
3866
3867 /* Call the allocation method of the superclass. */
3868 entry = bfd_hash_newfunc (entry, table, string);
3869 if (entry != NULL)
3870 {
3871 struct ppc_branch_hash_entry *eh;
3872
3873 /* Initialize the local fields. */
3874 eh = (struct ppc_branch_hash_entry *) entry;
3875 eh->offset = 0;
3876 eh->iter = 0;
3877 }
3878
3879 return entry;
3880 }
3881
3882 /* Create an entry in a ppc64 ELF linker hash table. */
3883
3884 static struct bfd_hash_entry *
3885 link_hash_newfunc (struct bfd_hash_entry *entry,
3886 struct bfd_hash_table *table,
3887 const char *string)
3888 {
3889 /* Allocate the structure if it has not already been allocated by a
3890 subclass. */
3891 if (entry == NULL)
3892 {
3893 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3894 if (entry == NULL)
3895 return entry;
3896 }
3897
3898 /* Call the allocation method of the superclass. */
3899 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3900 if (entry != NULL)
3901 {
3902 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3903
3904 memset (&eh->u.stub_cache, 0,
3905 (sizeof (struct ppc_link_hash_entry)
3906 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3907
3908 /* When making function calls, old ABI code references function entry
3909 points (dot symbols), while new ABI code references the function
3910 descriptor symbol. We need to make any combination of reference and
3911 definition work together, without breaking archive linking.
3912
3913 For a defined function "foo" and an undefined call to "bar":
3914 An old object defines "foo" and ".foo", references ".bar" (possibly
3915 "bar" too).
3916 A new object defines "foo" and references "bar".
3917
3918 A new object thus has no problem with its undefined symbols being
3919 satisfied by definitions in an old object. On the other hand, the
3920 old object won't have ".bar" satisfied by a new object.
3921
3922 Keep a list of newly added dot-symbols. */
3923
3924 if (string[0] == '.')
3925 {
3926 struct ppc_link_hash_table *htab;
3927
3928 htab = (struct ppc_link_hash_table *) table;
3929 eh->u.next_dot_sym = htab->dot_syms;
3930 htab->dot_syms = eh;
3931 }
3932 }
3933
3934 return entry;
3935 }
3936
3937 /* Create a ppc64 ELF linker hash table. */
3938
3939 static struct bfd_link_hash_table *
3940 ppc64_elf_link_hash_table_create (bfd *abfd)
3941 {
3942 struct ppc_link_hash_table *htab;
3943 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3944
3945 htab = bfd_zmalloc (amt);
3946 if (htab == NULL)
3947 return NULL;
3948
3949 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3950 sizeof (struct ppc_link_hash_entry)))
3951 {
3952 free (htab);
3953 return NULL;
3954 }
3955
3956 /* Init the stub hash table too. */
3957 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3958 sizeof (struct ppc_stub_hash_entry)))
3959 return NULL;
3960
3961 /* And the branch hash table. */
3962 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3963 sizeof (struct ppc_branch_hash_entry)))
3964 return NULL;
3965
3966 /* Initializing two fields of the union is just cosmetic. We really
3967 only care about glist, but when compiled on a 32-bit host the
3968 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3969 debugger inspection of these fields look nicer. */
3970 htab->elf.init_got_refcount.refcount = 0;
3971 htab->elf.init_got_refcount.glist = NULL;
3972 htab->elf.init_plt_refcount.refcount = 0;
3973 htab->elf.init_plt_refcount.glist = NULL;
3974 htab->elf.init_got_offset.offset = 0;
3975 htab->elf.init_got_offset.glist = NULL;
3976 htab->elf.init_plt_offset.offset = 0;
3977 htab->elf.init_plt_offset.glist = NULL;
3978
3979 return &htab->elf.root;
3980 }
3981
3982 /* Free the derived linker hash table. */
3983
3984 static void
3985 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3986 {
3987 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3988
3989 bfd_hash_table_free (&ret->stub_hash_table);
3990 bfd_hash_table_free (&ret->branch_hash_table);
3991 _bfd_generic_link_hash_table_free (hash);
3992 }
3993
3994 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3995
3996 void
3997 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3998 {
3999 struct ppc_link_hash_table *htab;
4000
4001 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4002
4003 /* Always hook our dynamic sections into the first bfd, which is the
4004 linker created stub bfd. This ensures that the GOT header is at
4005 the start of the output TOC section. */
4006 htab = ppc_hash_table (info);
4007 htab->stub_bfd = abfd;
4008 htab->elf.dynobj = abfd;
4009 }
4010
4011 /* Build a name for an entry in the stub hash table. */
4012
4013 static char *
4014 ppc_stub_name (const asection *input_section,
4015 const asection *sym_sec,
4016 const struct ppc_link_hash_entry *h,
4017 const Elf_Internal_Rela *rel)
4018 {
4019 char *stub_name;
4020 bfd_size_type len;
4021
4022 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4023 offsets from a sym as a branch target? In fact, we could
4024 probably assume the addend is always zero. */
4025 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4026
4027 if (h)
4028 {
4029 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4030 stub_name = bfd_malloc (len);
4031 if (stub_name == NULL)
4032 return stub_name;
4033
4034 sprintf (stub_name, "%08x.%s+%x",
4035 input_section->id & 0xffffffff,
4036 h->elf.root.root.string,
4037 (int) rel->r_addend & 0xffffffff);
4038 }
4039 else
4040 {
4041 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4042 stub_name = bfd_malloc (len);
4043 if (stub_name == NULL)
4044 return stub_name;
4045
4046 sprintf (stub_name, "%08x.%x:%x+%x",
4047 input_section->id & 0xffffffff,
4048 sym_sec->id & 0xffffffff,
4049 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4050 (int) rel->r_addend & 0xffffffff);
4051 }
4052 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4053 stub_name[len - 2] = 0;
4054 return stub_name;
4055 }
4056
4057 /* Look up an entry in the stub hash. Stub entries are cached because
4058 creating the stub name takes a bit of time. */
4059
4060 static struct ppc_stub_hash_entry *
4061 ppc_get_stub_entry (const asection *input_section,
4062 const asection *sym_sec,
4063 struct ppc_link_hash_entry *h,
4064 const Elf_Internal_Rela *rel,
4065 struct ppc_link_hash_table *htab)
4066 {
4067 struct ppc_stub_hash_entry *stub_entry;
4068 const asection *id_sec;
4069
4070 /* If this input section is part of a group of sections sharing one
4071 stub section, then use the id of the first section in the group.
4072 Stub names need to include a section id, as there may well be
4073 more than one stub used to reach say, printf, and we need to
4074 distinguish between them. */
4075 id_sec = htab->stub_group[input_section->id].link_sec;
4076
4077 if (h != NULL && h->u.stub_cache != NULL
4078 && h->u.stub_cache->h == h
4079 && h->u.stub_cache->id_sec == id_sec)
4080 {
4081 stub_entry = h->u.stub_cache;
4082 }
4083 else
4084 {
4085 char *stub_name;
4086
4087 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4088 if (stub_name == NULL)
4089 return NULL;
4090
4091 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4092 stub_name, FALSE, FALSE);
4093 if (h != NULL)
4094 h->u.stub_cache = stub_entry;
4095
4096 free (stub_name);
4097 }
4098
4099 return stub_entry;
4100 }
4101
4102 /* Add a new stub entry to the stub hash. Not all fields of the new
4103 stub entry are initialised. */
4104
4105 static struct ppc_stub_hash_entry *
4106 ppc_add_stub (const char *stub_name,
4107 asection *section,
4108 struct ppc_link_hash_table *htab)
4109 {
4110 asection *link_sec;
4111 asection *stub_sec;
4112 struct ppc_stub_hash_entry *stub_entry;
4113
4114 link_sec = htab->stub_group[section->id].link_sec;
4115 stub_sec = htab->stub_group[section->id].stub_sec;
4116 if (stub_sec == NULL)
4117 {
4118 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4119 if (stub_sec == NULL)
4120 {
4121 size_t namelen;
4122 bfd_size_type len;
4123 char *s_name;
4124
4125 namelen = strlen (link_sec->name);
4126 len = namelen + sizeof (STUB_SUFFIX);
4127 s_name = bfd_alloc (htab->stub_bfd, len);
4128 if (s_name == NULL)
4129 return NULL;
4130
4131 memcpy (s_name, link_sec->name, namelen);
4132 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4133 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4134 if (stub_sec == NULL)
4135 return NULL;
4136 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4137 }
4138 htab->stub_group[section->id].stub_sec = stub_sec;
4139 }
4140
4141 /* Enter this entry into the linker stub hash table. */
4142 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4143 TRUE, FALSE);
4144 if (stub_entry == NULL)
4145 {
4146 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4147 section->owner, stub_name);
4148 return NULL;
4149 }
4150
4151 stub_entry->stub_sec = stub_sec;
4152 stub_entry->stub_offset = 0;
4153 stub_entry->id_sec = link_sec;
4154 return stub_entry;
4155 }
4156
4157 /* Create sections for linker generated code. */
4158
4159 static bfd_boolean
4160 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4161 {
4162 struct ppc_link_hash_table *htab;
4163 flagword flags;
4164
4165 htab = ppc_hash_table (info);
4166
4167 /* Create .sfpr for code to save and restore fp regs. */
4168 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4169 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4170 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4171 flags);
4172 if (htab->sfpr == NULL
4173 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4174 return FALSE;
4175
4176 /* Create .glink for lazy dynamic linking support. */
4177 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4178 flags);
4179 if (htab->glink == NULL
4180 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4181 return FALSE;
4182
4183 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4184 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4185 if (htab->iplt == NULL
4186 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4187 return FALSE;
4188
4189 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4190 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4191 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4192 ".rela.iplt",
4193 flags);
4194 if (htab->reliplt == NULL
4195 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4196 return FALSE;
4197
4198 /* Create branch lookup table for plt_branch stubs. */
4199 flags = (SEC_ALLOC | SEC_LOAD
4200 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4201 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4202 flags);
4203 if (htab->brlt == NULL
4204 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4205 return FALSE;
4206
4207 if (!info->shared)
4208 return TRUE;
4209
4210 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4211 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4212 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4213 ".rela.branch_lt",
4214 flags);
4215 if (htab->relbrlt == NULL
4216 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4217 return FALSE;
4218
4219 return TRUE;
4220 }
4221
4222 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4223 not already done. */
4224
4225 static bfd_boolean
4226 create_got_section (bfd *abfd, struct bfd_link_info *info)
4227 {
4228 asection *got, *relgot;
4229 flagword flags;
4230 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4231
4232 if (!is_ppc64_elf (abfd))
4233 return FALSE;
4234
4235 if (!htab->got)
4236 {
4237 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4238 return FALSE;
4239
4240 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4241 if (!htab->got)
4242 abort ();
4243 }
4244
4245 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4246 | SEC_LINKER_CREATED);
4247
4248 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4249 if (!got
4250 || !bfd_set_section_alignment (abfd, got, 3))
4251 return FALSE;
4252
4253 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4254 flags | SEC_READONLY);
4255 if (!relgot
4256 || ! bfd_set_section_alignment (abfd, relgot, 3))
4257 return FALSE;
4258
4259 ppc64_elf_tdata (abfd)->got = got;
4260 ppc64_elf_tdata (abfd)->relgot = relgot;
4261 return TRUE;
4262 }
4263
4264 /* Create the dynamic sections, and set up shortcuts. */
4265
4266 static bfd_boolean
4267 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4268 {
4269 struct ppc_link_hash_table *htab;
4270
4271 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4272 return FALSE;
4273
4274 htab = ppc_hash_table (info);
4275 if (!htab->got)
4276 htab->got = bfd_get_section_by_name (dynobj, ".got");
4277 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4278 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4279 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4280 if (!info->shared)
4281 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4282
4283 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4284 || (!info->shared && !htab->relbss))
4285 abort ();
4286
4287 return TRUE;
4288 }
4289
4290 /* Follow indirect and warning symbol links. */
4291
4292 static inline struct bfd_link_hash_entry *
4293 follow_link (struct bfd_link_hash_entry *h)
4294 {
4295 while (h->type == bfd_link_hash_indirect
4296 || h->type == bfd_link_hash_warning)
4297 h = h->u.i.link;
4298 return h;
4299 }
4300
4301 static inline struct elf_link_hash_entry *
4302 elf_follow_link (struct elf_link_hash_entry *h)
4303 {
4304 return (struct elf_link_hash_entry *) follow_link (&h->root);
4305 }
4306
4307 static inline struct ppc_link_hash_entry *
4308 ppc_follow_link (struct ppc_link_hash_entry *h)
4309 {
4310 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4311 }
4312
4313 /* Merge PLT info on FROM with that on TO. */
4314
4315 static void
4316 move_plt_plist (struct ppc_link_hash_entry *from,
4317 struct ppc_link_hash_entry *to)
4318 {
4319 if (from->elf.plt.plist != NULL)
4320 {
4321 if (to->elf.plt.plist != NULL)
4322 {
4323 struct plt_entry **entp;
4324 struct plt_entry *ent;
4325
4326 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4327 {
4328 struct plt_entry *dent;
4329
4330 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4331 if (dent->addend == ent->addend)
4332 {
4333 dent->plt.refcount += ent->plt.refcount;
4334 *entp = ent->next;
4335 break;
4336 }
4337 if (dent == NULL)
4338 entp = &ent->next;
4339 }
4340 *entp = to->elf.plt.plist;
4341 }
4342
4343 to->elf.plt.plist = from->elf.plt.plist;
4344 from->elf.plt.plist = NULL;
4345 }
4346 }
4347
4348 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4349
4350 static void
4351 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4352 struct elf_link_hash_entry *dir,
4353 struct elf_link_hash_entry *ind)
4354 {
4355 struct ppc_link_hash_entry *edir, *eind;
4356
4357 edir = (struct ppc_link_hash_entry *) dir;
4358 eind = (struct ppc_link_hash_entry *) ind;
4359
4360 /* Copy over any dynamic relocs we may have on the indirect sym. */
4361 if (eind->dyn_relocs != NULL)
4362 {
4363 if (edir->dyn_relocs != NULL)
4364 {
4365 struct ppc_dyn_relocs **pp;
4366 struct ppc_dyn_relocs *p;
4367
4368 /* Add reloc counts against the indirect sym to the direct sym
4369 list. Merge any entries against the same section. */
4370 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4371 {
4372 struct ppc_dyn_relocs *q;
4373
4374 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4375 if (q->sec == p->sec)
4376 {
4377 q->pc_count += p->pc_count;
4378 q->count += p->count;
4379 *pp = p->next;
4380 break;
4381 }
4382 if (q == NULL)
4383 pp = &p->next;
4384 }
4385 *pp = edir->dyn_relocs;
4386 }
4387
4388 edir->dyn_relocs = eind->dyn_relocs;
4389 eind->dyn_relocs = NULL;
4390 }
4391
4392 edir->is_func |= eind->is_func;
4393 edir->is_func_descriptor |= eind->is_func_descriptor;
4394 edir->tls_mask |= eind->tls_mask;
4395 if (eind->oh != NULL)
4396 edir->oh = ppc_follow_link (eind->oh);
4397
4398 /* If called to transfer flags for a weakdef during processing
4399 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4400 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4401 if (!(ELIMINATE_COPY_RELOCS
4402 && eind->elf.root.type != bfd_link_hash_indirect
4403 && edir->elf.dynamic_adjusted))
4404 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4405
4406 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4407 edir->elf.ref_regular |= eind->elf.ref_regular;
4408 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4409 edir->elf.needs_plt |= eind->elf.needs_plt;
4410
4411 /* If we were called to copy over info for a weak sym, that's all. */
4412 if (eind->elf.root.type != bfd_link_hash_indirect)
4413 return;
4414
4415 /* Copy over got entries that we may have already seen to the
4416 symbol which just became indirect. */
4417 if (eind->elf.got.glist != NULL)
4418 {
4419 if (edir->elf.got.glist != NULL)
4420 {
4421 struct got_entry **entp;
4422 struct got_entry *ent;
4423
4424 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4425 {
4426 struct got_entry *dent;
4427
4428 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4429 if (dent->addend == ent->addend
4430 && dent->owner == ent->owner
4431 && dent->tls_type == ent->tls_type)
4432 {
4433 dent->got.refcount += ent->got.refcount;
4434 *entp = ent->next;
4435 break;
4436 }
4437 if (dent == NULL)
4438 entp = &ent->next;
4439 }
4440 *entp = edir->elf.got.glist;
4441 }
4442
4443 edir->elf.got.glist = eind->elf.got.glist;
4444 eind->elf.got.glist = NULL;
4445 }
4446
4447 /* And plt entries. */
4448 move_plt_plist (eind, edir);
4449
4450 if (eind->elf.dynindx != -1)
4451 {
4452 if (edir->elf.dynindx != -1)
4453 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4454 edir->elf.dynstr_index);
4455 edir->elf.dynindx = eind->elf.dynindx;
4456 edir->elf.dynstr_index = eind->elf.dynstr_index;
4457 eind->elf.dynindx = -1;
4458 eind->elf.dynstr_index = 0;
4459 }
4460 }
4461
4462 /* Find the function descriptor hash entry from the given function code
4463 hash entry FH. Link the entries via their OH fields. */
4464
4465 static struct ppc_link_hash_entry *
4466 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4467 {
4468 struct ppc_link_hash_entry *fdh = fh->oh;
4469
4470 if (fdh == NULL)
4471 {
4472 const char *fd_name = fh->elf.root.root.string + 1;
4473
4474 fdh = (struct ppc_link_hash_entry *)
4475 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4476 if (fdh == NULL)
4477 return fdh;
4478
4479 fdh->is_func_descriptor = 1;
4480 fdh->oh = fh;
4481 fh->is_func = 1;
4482 fh->oh = fdh;
4483 }
4484
4485 return ppc_follow_link (fdh);
4486 }
4487
4488 /* Make a fake function descriptor sym for the code sym FH. */
4489
4490 static struct ppc_link_hash_entry *
4491 make_fdh (struct bfd_link_info *info,
4492 struct ppc_link_hash_entry *fh)
4493 {
4494 bfd *abfd;
4495 asymbol *newsym;
4496 struct bfd_link_hash_entry *bh;
4497 struct ppc_link_hash_entry *fdh;
4498
4499 abfd = fh->elf.root.u.undef.abfd;
4500 newsym = bfd_make_empty_symbol (abfd);
4501 newsym->name = fh->elf.root.root.string + 1;
4502 newsym->section = bfd_und_section_ptr;
4503 newsym->value = 0;
4504 newsym->flags = BSF_WEAK;
4505
4506 bh = NULL;
4507 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4508 newsym->flags, newsym->section,
4509 newsym->value, NULL, FALSE, FALSE,
4510 &bh))
4511 return NULL;
4512
4513 fdh = (struct ppc_link_hash_entry *) bh;
4514 fdh->elf.non_elf = 0;
4515 fdh->fake = 1;
4516 fdh->is_func_descriptor = 1;
4517 fdh->oh = fh;
4518 fh->is_func = 1;
4519 fh->oh = fdh;
4520 return fdh;
4521 }
4522
4523 /* Fix function descriptor symbols defined in .opd sections to be
4524 function type. */
4525
4526 static bfd_boolean
4527 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4528 struct bfd_link_info *info,
4529 Elf_Internal_Sym *isym,
4530 const char **name ATTRIBUTE_UNUSED,
4531 flagword *flags ATTRIBUTE_UNUSED,
4532 asection **sec,
4533 bfd_vma *value ATTRIBUTE_UNUSED)
4534 {
4535 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4536 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4537 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4538 ;
4539 else if (*sec != NULL
4540 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4541 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4542
4543 return TRUE;
4544 }
4545
4546 /* This function makes an old ABI object reference to ".bar" cause the
4547 inclusion of a new ABI object archive that defines "bar".
4548 NAME is a symbol defined in an archive. Return a symbol in the hash
4549 table that might be satisfied by the archive symbols. */
4550
4551 static struct elf_link_hash_entry *
4552 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4553 struct bfd_link_info *info,
4554 const char *name)
4555 {
4556 struct elf_link_hash_entry *h;
4557 char *dot_name;
4558 size_t len;
4559
4560 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4561 if (h != NULL
4562 /* Don't return this sym if it is a fake function descriptor
4563 created by add_symbol_adjust. */
4564 && !(h->root.type == bfd_link_hash_undefweak
4565 && ((struct ppc_link_hash_entry *) h)->fake))
4566 return h;
4567
4568 if (name[0] == '.')
4569 return h;
4570
4571 len = strlen (name);
4572 dot_name = bfd_alloc (abfd, len + 2);
4573 if (dot_name == NULL)
4574 return (struct elf_link_hash_entry *) 0 - 1;
4575 dot_name[0] = '.';
4576 memcpy (dot_name + 1, name, len + 1);
4577 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4578 bfd_release (abfd, dot_name);
4579 return h;
4580 }
4581
4582 /* This function satisfies all old ABI object references to ".bar" if a
4583 new ABI object defines "bar". Well, at least, undefined dot symbols
4584 are made weak. This stops later archive searches from including an
4585 object if we already have a function descriptor definition. It also
4586 prevents the linker complaining about undefined symbols.
4587 We also check and correct mismatched symbol visibility here. The
4588 most restrictive visibility of the function descriptor and the
4589 function entry symbol is used. */
4590
4591 static bfd_boolean
4592 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4593 {
4594 struct ppc_link_hash_table *htab;
4595 struct ppc_link_hash_entry *fdh;
4596
4597 if (eh->elf.root.type == bfd_link_hash_indirect)
4598 return TRUE;
4599
4600 if (eh->elf.root.type == bfd_link_hash_warning)
4601 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4602
4603 if (eh->elf.root.root.string[0] != '.')
4604 abort ();
4605
4606 htab = ppc_hash_table (info);
4607 fdh = lookup_fdh (eh, htab);
4608 if (fdh == NULL)
4609 {
4610 if (!info->relocatable
4611 && (eh->elf.root.type == bfd_link_hash_undefined
4612 || eh->elf.root.type == bfd_link_hash_undefweak)
4613 && eh->elf.ref_regular)
4614 {
4615 /* Make an undefweak function descriptor sym, which is enough to
4616 pull in an --as-needed shared lib, but won't cause link
4617 errors. Archives are handled elsewhere. */
4618 fdh = make_fdh (info, eh);
4619 if (fdh == NULL)
4620 return FALSE;
4621 fdh->elf.ref_regular = 1;
4622 }
4623 }
4624 else
4625 {
4626 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4627 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4628 if (entry_vis < descr_vis)
4629 fdh->elf.other += entry_vis - descr_vis;
4630 else if (entry_vis > descr_vis)
4631 eh->elf.other += descr_vis - entry_vis;
4632
4633 if ((fdh->elf.root.type == bfd_link_hash_defined
4634 || fdh->elf.root.type == bfd_link_hash_defweak)
4635 && eh->elf.root.type == bfd_link_hash_undefined)
4636 {
4637 eh->elf.root.type = bfd_link_hash_undefweak;
4638 eh->was_undefined = 1;
4639 htab->twiddled_syms = 1;
4640 }
4641 }
4642
4643 return TRUE;
4644 }
4645
4646 /* Process list of dot-symbols we made in link_hash_newfunc. */
4647
4648 static bfd_boolean
4649 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4650 {
4651 struct ppc_link_hash_table *htab;
4652 struct ppc_link_hash_entry **p, *eh;
4653
4654 htab = ppc_hash_table (info);
4655 if (!is_ppc64_elf (info->output_bfd))
4656 return TRUE;
4657
4658 if (is_ppc64_elf (ibfd))
4659 {
4660 p = &htab->dot_syms;
4661 while ((eh = *p) != NULL)
4662 {
4663 *p = NULL;
4664 if (!add_symbol_adjust (eh, info))
4665 return FALSE;
4666 p = &eh->u.next_dot_sym;
4667 }
4668 }
4669
4670 /* Clear the list for non-ppc64 input files. */
4671 p = &htab->dot_syms;
4672 while ((eh = *p) != NULL)
4673 {
4674 *p = NULL;
4675 p = &eh->u.next_dot_sym;
4676 }
4677
4678 /* We need to fix the undefs list for any syms we have twiddled to
4679 undef_weak. */
4680 if (htab->twiddled_syms)
4681 {
4682 bfd_link_repair_undef_list (&htab->elf.root);
4683 htab->twiddled_syms = 0;
4684 }
4685 return TRUE;
4686 }
4687
4688 /* Undo hash table changes when an --as-needed input file is determined
4689 not to be needed. */
4690
4691 static bfd_boolean
4692 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4693 struct bfd_link_info *info)
4694 {
4695 ppc_hash_table (info)->dot_syms = NULL;
4696 return TRUE;
4697 }
4698
4699 static struct plt_entry **
4700 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4701 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4702 {
4703 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4704 struct plt_entry **local_plt;
4705 char *local_got_tls_masks;
4706
4707 if (local_got_ents == NULL)
4708 {
4709 bfd_size_type size = symtab_hdr->sh_info;
4710
4711 size *= (sizeof (*local_got_ents)
4712 + sizeof (*local_plt)
4713 + sizeof (*local_got_tls_masks));
4714 local_got_ents = bfd_zalloc (abfd, size);
4715 if (local_got_ents == NULL)
4716 return NULL;
4717 elf_local_got_ents (abfd) = local_got_ents;
4718 }
4719
4720 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4721 {
4722 struct got_entry *ent;
4723
4724 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4725 if (ent->addend == r_addend
4726 && ent->owner == abfd
4727 && ent->tls_type == tls_type)
4728 break;
4729 if (ent == NULL)
4730 {
4731 bfd_size_type amt = sizeof (*ent);
4732 ent = bfd_alloc (abfd, amt);
4733 if (ent == NULL)
4734 return FALSE;
4735 ent->next = local_got_ents[r_symndx];
4736 ent->addend = r_addend;
4737 ent->owner = abfd;
4738 ent->tls_type = tls_type;
4739 ent->got.refcount = 0;
4740 local_got_ents[r_symndx] = ent;
4741 }
4742 ent->got.refcount += 1;
4743 }
4744
4745 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4746 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
4747 local_got_tls_masks[r_symndx] |= tls_type;
4748
4749 return local_plt + r_symndx;
4750 }
4751
4752 static bfd_boolean
4753 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4754 {
4755 struct plt_entry *ent;
4756
4757 for (ent = *plist; ent != NULL; ent = ent->next)
4758 if (ent->addend == addend)
4759 break;
4760 if (ent == NULL)
4761 {
4762 bfd_size_type amt = sizeof (*ent);
4763 ent = bfd_alloc (abfd, amt);
4764 if (ent == NULL)
4765 return FALSE;
4766 ent->next = *plist;
4767 ent->addend = addend;
4768 ent->plt.refcount = 0;
4769 *plist = ent;
4770 }
4771 ent->plt.refcount += 1;
4772 return TRUE;
4773 }
4774
4775 static bfd_boolean
4776 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4777 {
4778 return (r_type == R_PPC64_REL24
4779 || r_type == R_PPC64_REL14
4780 || r_type == R_PPC64_REL14_BRTAKEN
4781 || r_type == R_PPC64_REL14_BRNTAKEN
4782 || r_type == R_PPC64_ADDR24
4783 || r_type == R_PPC64_ADDR14
4784 || r_type == R_PPC64_ADDR14_BRTAKEN
4785 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4786 }
4787
4788 /* Look through the relocs for a section during the first phase, and
4789 calculate needed space in the global offset table, procedure
4790 linkage table, and dynamic reloc sections. */
4791
4792 static bfd_boolean
4793 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4794 asection *sec, const Elf_Internal_Rela *relocs)
4795 {
4796 struct ppc_link_hash_table *htab;
4797 Elf_Internal_Shdr *symtab_hdr;
4798 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4799 const Elf_Internal_Rela *rel;
4800 const Elf_Internal_Rela *rel_end;
4801 asection *sreloc;
4802 asection **opd_sym_map;
4803 struct elf_link_hash_entry *tga, *dottga;
4804
4805 if (info->relocatable)
4806 return TRUE;
4807
4808 /* Don't do anything special with non-loaded, non-alloced sections.
4809 In particular, any relocs in such sections should not affect GOT
4810 and PLT reference counting (ie. we don't allow them to create GOT
4811 or PLT entries), there's no possibility or desire to optimize TLS
4812 relocs, and there's not much point in propagating relocs to shared
4813 libs that the dynamic linker won't relocate. */
4814 if ((sec->flags & SEC_ALLOC) == 0)
4815 return TRUE;
4816
4817 BFD_ASSERT (is_ppc64_elf (abfd));
4818
4819 htab = ppc_hash_table (info);
4820 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4821 FALSE, FALSE, TRUE);
4822 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4823 FALSE, FALSE, TRUE);
4824 symtab_hdr = &elf_symtab_hdr (abfd);
4825
4826 sym_hashes = elf_sym_hashes (abfd);
4827 sym_hashes_end = (sym_hashes
4828 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4829 - symtab_hdr->sh_info);
4830
4831 sreloc = NULL;
4832 opd_sym_map = NULL;
4833 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4834 {
4835 /* Garbage collection needs some extra help with .opd sections.
4836 We don't want to necessarily keep everything referenced by
4837 relocs in .opd, as that would keep all functions. Instead,
4838 if we reference an .opd symbol (a function descriptor), we
4839 want to keep the function code symbol's section. This is
4840 easy for global symbols, but for local syms we need to keep
4841 information about the associated function section. */
4842 bfd_size_type amt;
4843
4844 amt = sec->size * sizeof (*opd_sym_map) / 8;
4845 opd_sym_map = bfd_zalloc (abfd, amt);
4846 if (opd_sym_map == NULL)
4847 return FALSE;
4848 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4849 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4850 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4851 }
4852
4853 if (htab->sfpr == NULL
4854 && !create_linkage_sections (htab->elf.dynobj, info))
4855 return FALSE;
4856
4857 rel_end = relocs + sec->reloc_count;
4858 for (rel = relocs; rel < rel_end; rel++)
4859 {
4860 unsigned long r_symndx;
4861 struct elf_link_hash_entry *h;
4862 enum elf_ppc64_reloc_type r_type;
4863 int tls_type;
4864 struct _ppc64_elf_section_data *ppc64_sec;
4865 struct plt_entry **ifunc;
4866
4867 r_symndx = ELF64_R_SYM (rel->r_info);
4868 if (r_symndx < symtab_hdr->sh_info)
4869 h = NULL;
4870 else
4871 {
4872 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4873 h = elf_follow_link (h);
4874 }
4875
4876 tls_type = 0;
4877 ifunc = NULL;
4878 if (h != NULL)
4879 {
4880 if (h->type == STT_GNU_IFUNC)
4881 {
4882 h->needs_plt = 1;
4883 ifunc = &h->plt.plist;
4884 }
4885 }
4886 else
4887 {
4888 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4889 abfd, r_symndx);
4890 if (isym == NULL)
4891 return FALSE;
4892
4893 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4894 {
4895 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4896 rel->r_addend, PLT_IFUNC);
4897 if (ifunc == NULL)
4898 return FALSE;
4899 }
4900 }
4901 r_type = ELF64_R_TYPE (rel->r_info);
4902 if (is_branch_reloc (r_type))
4903 {
4904 if (h != NULL && (h == tga || h == dottga))
4905 {
4906 if (rel != relocs
4907 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4908 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4909 /* We have a new-style __tls_get_addr call with a marker
4910 reloc. */
4911 ;
4912 else
4913 /* Mark this section as having an old-style call. */
4914 sec->has_tls_get_addr_call = 1;
4915 }
4916
4917 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4918 if (ifunc != NULL
4919 && !update_plt_info (abfd, ifunc, rel->r_addend))
4920 return FALSE;
4921 }
4922
4923 switch (r_type)
4924 {
4925 case R_PPC64_TLSGD:
4926 case R_PPC64_TLSLD:
4927 /* These special tls relocs tie a call to __tls_get_addr with
4928 its parameter symbol. */
4929 break;
4930
4931 case R_PPC64_GOT_TLSLD16:
4932 case R_PPC64_GOT_TLSLD16_LO:
4933 case R_PPC64_GOT_TLSLD16_HI:
4934 case R_PPC64_GOT_TLSLD16_HA:
4935 tls_type = TLS_TLS | TLS_LD;
4936 goto dogottls;
4937
4938 case R_PPC64_GOT_TLSGD16:
4939 case R_PPC64_GOT_TLSGD16_LO:
4940 case R_PPC64_GOT_TLSGD16_HI:
4941 case R_PPC64_GOT_TLSGD16_HA:
4942 tls_type = TLS_TLS | TLS_GD;
4943 goto dogottls;
4944
4945 case R_PPC64_GOT_TPREL16_DS:
4946 case R_PPC64_GOT_TPREL16_LO_DS:
4947 case R_PPC64_GOT_TPREL16_HI:
4948 case R_PPC64_GOT_TPREL16_HA:
4949 if (!info->executable)
4950 info->flags |= DF_STATIC_TLS;
4951 tls_type = TLS_TLS | TLS_TPREL;
4952 goto dogottls;
4953
4954 case R_PPC64_GOT_DTPREL16_DS:
4955 case R_PPC64_GOT_DTPREL16_LO_DS:
4956 case R_PPC64_GOT_DTPREL16_HI:
4957 case R_PPC64_GOT_DTPREL16_HA:
4958 tls_type = TLS_TLS | TLS_DTPREL;
4959 dogottls:
4960 sec->has_tls_reloc = 1;
4961 /* Fall thru */
4962
4963 case R_PPC64_GOT16:
4964 case R_PPC64_GOT16_DS:
4965 case R_PPC64_GOT16_HA:
4966 case R_PPC64_GOT16_HI:
4967 case R_PPC64_GOT16_LO:
4968 case R_PPC64_GOT16_LO_DS:
4969 /* This symbol requires a global offset table entry. */
4970 sec->has_toc_reloc = 1;
4971 if (ppc64_elf_tdata (abfd)->got == NULL
4972 && !create_got_section (abfd, info))
4973 return FALSE;
4974
4975 if (h != NULL)
4976 {
4977 struct ppc_link_hash_entry *eh;
4978 struct got_entry *ent;
4979
4980 eh = (struct ppc_link_hash_entry *) h;
4981 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4982 if (ent->addend == rel->r_addend
4983 && ent->owner == abfd
4984 && ent->tls_type == tls_type)
4985 break;
4986 if (ent == NULL)
4987 {
4988 bfd_size_type amt = sizeof (*ent);
4989 ent = bfd_alloc (abfd, amt);
4990 if (ent == NULL)
4991 return FALSE;
4992 ent->next = eh->elf.got.glist;
4993 ent->addend = rel->r_addend;
4994 ent->owner = abfd;
4995 ent->tls_type = tls_type;
4996 ent->got.refcount = 0;
4997 eh->elf.got.glist = ent;
4998 }
4999 ent->got.refcount += 1;
5000 eh->tls_mask |= tls_type;
5001 }
5002 else
5003 /* This is a global offset table entry for a local symbol. */
5004 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5005 rel->r_addend, tls_type))
5006 return FALSE;
5007 break;
5008
5009 case R_PPC64_PLT16_HA:
5010 case R_PPC64_PLT16_HI:
5011 case R_PPC64_PLT16_LO:
5012 case R_PPC64_PLT32:
5013 case R_PPC64_PLT64:
5014 /* This symbol requires a procedure linkage table entry. We
5015 actually build the entry in adjust_dynamic_symbol,
5016 because this might be a case of linking PIC code without
5017 linking in any dynamic objects, in which case we don't
5018 need to generate a procedure linkage table after all. */
5019 if (h == NULL)
5020 {
5021 /* It does not make sense to have a procedure linkage
5022 table entry for a local symbol. */
5023 bfd_set_error (bfd_error_bad_value);
5024 return FALSE;
5025 }
5026 else
5027 {
5028 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5029 return FALSE;
5030 h->needs_plt = 1;
5031 if (h->root.root.string[0] == '.'
5032 && h->root.root.string[1] != '\0')
5033 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5034 }
5035 break;
5036
5037 /* The following relocations don't need to propagate the
5038 relocation if linking a shared object since they are
5039 section relative. */
5040 case R_PPC64_SECTOFF:
5041 case R_PPC64_SECTOFF_LO:
5042 case R_PPC64_SECTOFF_HI:
5043 case R_PPC64_SECTOFF_HA:
5044 case R_PPC64_SECTOFF_DS:
5045 case R_PPC64_SECTOFF_LO_DS:
5046 case R_PPC64_DTPREL16:
5047 case R_PPC64_DTPREL16_LO:
5048 case R_PPC64_DTPREL16_HI:
5049 case R_PPC64_DTPREL16_HA:
5050 case R_PPC64_DTPREL16_DS:
5051 case R_PPC64_DTPREL16_LO_DS:
5052 case R_PPC64_DTPREL16_HIGHER:
5053 case R_PPC64_DTPREL16_HIGHERA:
5054 case R_PPC64_DTPREL16_HIGHEST:
5055 case R_PPC64_DTPREL16_HIGHESTA:
5056 break;
5057
5058 /* Nor do these. */
5059 case R_PPC64_REL16:
5060 case R_PPC64_REL16_LO:
5061 case R_PPC64_REL16_HI:
5062 case R_PPC64_REL16_HA:
5063 break;
5064
5065 case R_PPC64_TOC16:
5066 case R_PPC64_TOC16_LO:
5067 case R_PPC64_TOC16_HI:
5068 case R_PPC64_TOC16_HA:
5069 case R_PPC64_TOC16_DS:
5070 case R_PPC64_TOC16_LO_DS:
5071 sec->has_toc_reloc = 1;
5072 break;
5073
5074 /* This relocation describes the C++ object vtable hierarchy.
5075 Reconstruct it for later use during GC. */
5076 case R_PPC64_GNU_VTINHERIT:
5077 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5078 return FALSE;
5079 break;
5080
5081 /* This relocation describes which C++ vtable entries are actually
5082 used. Record for later use during GC. */
5083 case R_PPC64_GNU_VTENTRY:
5084 BFD_ASSERT (h != NULL);
5085 if (h != NULL
5086 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5087 return FALSE;
5088 break;
5089
5090 case R_PPC64_REL14:
5091 case R_PPC64_REL14_BRTAKEN:
5092 case R_PPC64_REL14_BRNTAKEN:
5093 {
5094 asection *dest = NULL;
5095
5096 /* Heuristic: If jumping outside our section, chances are
5097 we are going to need a stub. */
5098 if (h != NULL)
5099 {
5100 /* If the sym is weak it may be overridden later, so
5101 don't assume we know where a weak sym lives. */
5102 if (h->root.type == bfd_link_hash_defined)
5103 dest = h->root.u.def.section;
5104 }
5105 else
5106 {
5107 Elf_Internal_Sym *isym;
5108
5109 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5110 abfd, r_symndx);
5111 if (isym == NULL)
5112 return FALSE;
5113
5114 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5115 }
5116
5117 if (dest != sec)
5118 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5119 }
5120 /* Fall through. */
5121
5122 case R_PPC64_REL24:
5123 if (h != NULL && ifunc == NULL)
5124 {
5125 /* We may need a .plt entry if the function this reloc
5126 refers to is in a shared lib. */
5127 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5128 return FALSE;
5129 h->needs_plt = 1;
5130 if (h->root.root.string[0] == '.'
5131 && h->root.root.string[1] != '\0')
5132 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5133 if (h == tga || h == dottga)
5134 sec->has_tls_reloc = 1;
5135 }
5136 break;
5137
5138 case R_PPC64_TPREL64:
5139 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5140 if (!info->executable)
5141 info->flags |= DF_STATIC_TLS;
5142 goto dotlstoc;
5143
5144 case R_PPC64_DTPMOD64:
5145 if (rel + 1 < rel_end
5146 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5147 && rel[1].r_offset == rel->r_offset + 8)
5148 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5149 else
5150 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5151 goto dotlstoc;
5152
5153 case R_PPC64_DTPREL64:
5154 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5155 if (rel != relocs
5156 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5157 && rel[-1].r_offset == rel->r_offset - 8)
5158 /* This is the second reloc of a dtpmod, dtprel pair.
5159 Don't mark with TLS_DTPREL. */
5160 goto dodyn;
5161
5162 dotlstoc:
5163 sec->has_tls_reloc = 1;
5164 if (h != NULL)
5165 {
5166 struct ppc_link_hash_entry *eh;
5167 eh = (struct ppc_link_hash_entry *) h;
5168 eh->tls_mask |= tls_type;
5169 }
5170 else
5171 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5172 rel->r_addend, tls_type))
5173 return FALSE;
5174
5175 ppc64_sec = ppc64_elf_section_data (sec);
5176 if (ppc64_sec->sec_type != sec_toc)
5177 {
5178 bfd_size_type amt;
5179
5180 /* One extra to simplify get_tls_mask. */
5181 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5182 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5183 if (ppc64_sec->u.toc.symndx == NULL)
5184 return FALSE;
5185 amt = sec->size * sizeof (bfd_vma) / 8;
5186 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5187 if (ppc64_sec->u.toc.add == NULL)
5188 return FALSE;
5189 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5190 ppc64_sec->sec_type = sec_toc;
5191 }
5192 BFD_ASSERT (rel->r_offset % 8 == 0);
5193 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5194 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5195
5196 /* Mark the second slot of a GD or LD entry.
5197 -1 to indicate GD and -2 to indicate LD. */
5198 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5199 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5200 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5201 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5202 goto dodyn;
5203
5204 case R_PPC64_TPREL16:
5205 case R_PPC64_TPREL16_LO:
5206 case R_PPC64_TPREL16_HI:
5207 case R_PPC64_TPREL16_HA:
5208 case R_PPC64_TPREL16_DS:
5209 case R_PPC64_TPREL16_LO_DS:
5210 case R_PPC64_TPREL16_HIGHER:
5211 case R_PPC64_TPREL16_HIGHERA:
5212 case R_PPC64_TPREL16_HIGHEST:
5213 case R_PPC64_TPREL16_HIGHESTA:
5214 if (info->shared)
5215 {
5216 if (!info->executable)
5217 info->flags |= DF_STATIC_TLS;
5218 goto dodyn;
5219 }
5220 break;
5221
5222 case R_PPC64_ADDR64:
5223 if (opd_sym_map != NULL
5224 && rel + 1 < rel_end
5225 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5226 {
5227 if (h != NULL)
5228 {
5229 if (h->root.root.string[0] == '.'
5230 && h->root.root.string[1] != 0
5231 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5232 ;
5233 else
5234 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5235 }
5236 else
5237 {
5238 asection *s;
5239 Elf_Internal_Sym *isym;
5240
5241 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5242 abfd, r_symndx);
5243 if (isym == NULL)
5244 return FALSE;
5245
5246 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5247 if (s != NULL && s != sec)
5248 opd_sym_map[rel->r_offset / 8] = s;
5249 }
5250 }
5251 /* Fall through. */
5252
5253 case R_PPC64_REL30:
5254 case R_PPC64_REL32:
5255 case R_PPC64_REL64:
5256 case R_PPC64_ADDR14:
5257 case R_PPC64_ADDR14_BRNTAKEN:
5258 case R_PPC64_ADDR14_BRTAKEN:
5259 case R_PPC64_ADDR16:
5260 case R_PPC64_ADDR16_DS:
5261 case R_PPC64_ADDR16_HA:
5262 case R_PPC64_ADDR16_HI:
5263 case R_PPC64_ADDR16_HIGHER:
5264 case R_PPC64_ADDR16_HIGHERA:
5265 case R_PPC64_ADDR16_HIGHEST:
5266 case R_PPC64_ADDR16_HIGHESTA:
5267 case R_PPC64_ADDR16_LO:
5268 case R_PPC64_ADDR16_LO_DS:
5269 case R_PPC64_ADDR24:
5270 case R_PPC64_ADDR32:
5271 case R_PPC64_UADDR16:
5272 case R_PPC64_UADDR32:
5273 case R_PPC64_UADDR64:
5274 case R_PPC64_TOC:
5275 if (h != NULL && !info->shared)
5276 /* We may need a copy reloc. */
5277 h->non_got_ref = 1;
5278
5279 /* Don't propagate .opd relocs. */
5280 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5281 break;
5282
5283 /* If we are creating a shared library, and this is a reloc
5284 against a global symbol, or a non PC relative reloc
5285 against a local symbol, then we need to copy the reloc
5286 into the shared library. However, if we are linking with
5287 -Bsymbolic, we do not need to copy a reloc against a
5288 global symbol which is defined in an object we are
5289 including in the link (i.e., DEF_REGULAR is set). At
5290 this point we have not seen all the input files, so it is
5291 possible that DEF_REGULAR is not set now but will be set
5292 later (it is never cleared). In case of a weak definition,
5293 DEF_REGULAR may be cleared later by a strong definition in
5294 a shared library. We account for that possibility below by
5295 storing information in the dyn_relocs field of the hash
5296 table entry. A similar situation occurs when creating
5297 shared libraries and symbol visibility changes render the
5298 symbol local.
5299
5300 If on the other hand, we are creating an executable, we
5301 may need to keep relocations for symbols satisfied by a
5302 dynamic library if we manage to avoid copy relocs for the
5303 symbol. */
5304 dodyn:
5305 if ((info->shared
5306 && (must_be_dyn_reloc (info, r_type)
5307 || (h != NULL
5308 && (! info->symbolic
5309 || h->root.type == bfd_link_hash_defweak
5310 || !h->def_regular))))
5311 || (ELIMINATE_COPY_RELOCS
5312 && !info->shared
5313 && h != NULL
5314 && (h->root.type == bfd_link_hash_defweak
5315 || !h->def_regular))
5316 || (!info->shared
5317 && ifunc != NULL))
5318 {
5319 struct ppc_dyn_relocs *p;
5320 struct ppc_dyn_relocs **head;
5321
5322 /* We must copy these reloc types into the output file.
5323 Create a reloc section in dynobj and make room for
5324 this reloc. */
5325 if (sreloc == NULL)
5326 {
5327 sreloc = _bfd_elf_make_dynamic_reloc_section
5328 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5329
5330 if (sreloc == NULL)
5331 return FALSE;
5332 }
5333
5334 /* If this is a global symbol, we count the number of
5335 relocations we need for this symbol. */
5336 if (h != NULL)
5337 {
5338 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5339 }
5340 else
5341 {
5342 /* Track dynamic relocs needed for local syms too.
5343 We really need local syms available to do this
5344 easily. Oh well. */
5345 asection *s;
5346 void *vpp;
5347 Elf_Internal_Sym *isym;
5348
5349 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5350 abfd, r_symndx);
5351 if (isym == NULL)
5352 return FALSE;
5353
5354 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5355 if (s == NULL)
5356 s = sec;
5357
5358 vpp = &elf_section_data (s)->local_dynrel;
5359 head = (struct ppc_dyn_relocs **) vpp;
5360 }
5361
5362 p = *head;
5363 if (p == NULL || p->sec != sec)
5364 {
5365 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5366 if (p == NULL)
5367 return FALSE;
5368 p->next = *head;
5369 *head = p;
5370 p->sec = sec;
5371 p->count = 0;
5372 p->pc_count = 0;
5373 }
5374
5375 p->count += 1;
5376 if (!must_be_dyn_reloc (info, r_type))
5377 p->pc_count += 1;
5378 }
5379 break;
5380
5381 default:
5382 break;
5383 }
5384 }
5385
5386 return TRUE;
5387 }
5388
5389 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5390 of the code entry point, and its section. */
5391
5392 static bfd_vma
5393 opd_entry_value (asection *opd_sec,
5394 bfd_vma offset,
5395 asection **code_sec,
5396 bfd_vma *code_off)
5397 {
5398 bfd *opd_bfd = opd_sec->owner;
5399 Elf_Internal_Rela *relocs;
5400 Elf_Internal_Rela *lo, *hi, *look;
5401 bfd_vma val;
5402
5403 /* No relocs implies we are linking a --just-symbols object. */
5404 if (opd_sec->reloc_count == 0)
5405 {
5406 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5407 return (bfd_vma) -1;
5408
5409 if (code_sec != NULL)
5410 {
5411 asection *sec, *likely = NULL;
5412 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5413 if (sec->vma <= val
5414 && (sec->flags & SEC_LOAD) != 0
5415 && (sec->flags & SEC_ALLOC) != 0)
5416 likely = sec;
5417 if (likely != NULL)
5418 {
5419 *code_sec = likely;
5420 if (code_off != NULL)
5421 *code_off = val - likely->vma;
5422 }
5423 }
5424 return val;
5425 }
5426
5427 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5428
5429 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5430 if (relocs == NULL)
5431 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5432
5433 /* Go find the opd reloc at the sym address. */
5434 lo = relocs;
5435 BFD_ASSERT (lo != NULL);
5436 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5437 val = (bfd_vma) -1;
5438 while (lo < hi)
5439 {
5440 look = lo + (hi - lo) / 2;
5441 if (look->r_offset < offset)
5442 lo = look + 1;
5443 else if (look->r_offset > offset)
5444 hi = look;
5445 else
5446 {
5447 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5448
5449 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5450 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5451 {
5452 unsigned long symndx = ELF64_R_SYM (look->r_info);
5453 asection *sec;
5454
5455 if (symndx < symtab_hdr->sh_info)
5456 {
5457 Elf_Internal_Sym *sym;
5458
5459 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5460 if (sym == NULL)
5461 {
5462 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5463 symtab_hdr->sh_info,
5464 0, NULL, NULL, NULL);
5465 if (sym == NULL)
5466 break;
5467 symtab_hdr->contents = (bfd_byte *) sym;
5468 }
5469
5470 sym += symndx;
5471 val = sym->st_value;
5472 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5473 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5474 }
5475 else
5476 {
5477 struct elf_link_hash_entry **sym_hashes;
5478 struct elf_link_hash_entry *rh;
5479
5480 sym_hashes = elf_sym_hashes (opd_bfd);
5481 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5482 rh = elf_follow_link (rh);
5483 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5484 || rh->root.type == bfd_link_hash_defweak);
5485 val = rh->root.u.def.value;
5486 sec = rh->root.u.def.section;
5487 }
5488 val += look->r_addend;
5489 if (code_off != NULL)
5490 *code_off = val;
5491 if (code_sec != NULL)
5492 *code_sec = sec;
5493 if (sec != NULL && sec->output_section != NULL)
5494 val += sec->output_section->vma + sec->output_offset;
5495 }
5496 break;
5497 }
5498 }
5499
5500 return val;
5501 }
5502
5503 /* If FDH is a function descriptor symbol, return the associated code
5504 entry symbol if it is defined. Return NULL otherwise. */
5505
5506 static struct ppc_link_hash_entry *
5507 defined_code_entry (struct ppc_link_hash_entry *fdh)
5508 {
5509 if (fdh->is_func_descriptor)
5510 {
5511 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5512 if (fh->elf.root.type == bfd_link_hash_defined
5513 || fh->elf.root.type == bfd_link_hash_defweak)
5514 return fh;
5515 }
5516 return NULL;
5517 }
5518
5519 /* If FH is a function code entry symbol, return the associated
5520 function descriptor symbol if it is defined. Return NULL otherwise. */
5521
5522 static struct ppc_link_hash_entry *
5523 defined_func_desc (struct ppc_link_hash_entry *fh)
5524 {
5525 if (fh->oh != NULL
5526 && fh->oh->is_func_descriptor)
5527 {
5528 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5529 if (fdh->elf.root.type == bfd_link_hash_defined
5530 || fdh->elf.root.type == bfd_link_hash_defweak)
5531 return fdh;
5532 }
5533 return NULL;
5534 }
5535
5536 /* Mark all our entry sym sections, both opd and code section. */
5537
5538 static void
5539 ppc64_elf_gc_keep (struct bfd_link_info *info)
5540 {
5541 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5542 struct bfd_sym_chain *sym;
5543
5544 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5545 {
5546 struct ppc_link_hash_entry *eh, *fh;
5547 asection *sec;
5548
5549 eh = (struct ppc_link_hash_entry *)
5550 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5551 if (eh == NULL)
5552 continue;
5553 if (eh->elf.root.type != bfd_link_hash_defined
5554 && eh->elf.root.type != bfd_link_hash_defweak)
5555 continue;
5556
5557 fh = defined_code_entry (eh);
5558 if (fh != NULL)
5559 {
5560 sec = fh->elf.root.u.def.section;
5561 sec->flags |= SEC_KEEP;
5562 }
5563 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5564 && opd_entry_value (eh->elf.root.u.def.section,
5565 eh->elf.root.u.def.value,
5566 &sec, NULL) != (bfd_vma) -1)
5567 sec->flags |= SEC_KEEP;
5568
5569 sec = eh->elf.root.u.def.section;
5570 sec->flags |= SEC_KEEP;
5571 }
5572 }
5573
5574 /* Mark sections containing dynamically referenced symbols. When
5575 building shared libraries, we must assume that any visible symbol is
5576 referenced. */
5577
5578 static bfd_boolean
5579 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5580 {
5581 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5582 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5583 struct ppc_link_hash_entry *fdh;
5584
5585 if (eh->elf.root.type == bfd_link_hash_warning)
5586 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5587
5588 /* Dynamic linking info is on the func descriptor sym. */
5589 fdh = defined_func_desc (eh);
5590 if (fdh != NULL)
5591 eh = fdh;
5592
5593 if ((eh->elf.root.type == bfd_link_hash_defined
5594 || eh->elf.root.type == bfd_link_hash_defweak)
5595 && (eh->elf.ref_dynamic
5596 || (!info->executable
5597 && eh->elf.def_regular
5598 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5599 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5600 {
5601 asection *code_sec;
5602 struct ppc_link_hash_entry *fh;
5603
5604 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5605
5606 /* Function descriptor syms cause the associated
5607 function code sym section to be marked. */
5608 fh = defined_code_entry (eh);
5609 if (fh != NULL)
5610 {
5611 code_sec = fh->elf.root.u.def.section;
5612 code_sec->flags |= SEC_KEEP;
5613 }
5614 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5615 && opd_entry_value (eh->elf.root.u.def.section,
5616 eh->elf.root.u.def.value,
5617 &code_sec, NULL) != (bfd_vma) -1)
5618 code_sec->flags |= SEC_KEEP;
5619 }
5620
5621 return TRUE;
5622 }
5623
5624 /* Return the section that should be marked against GC for a given
5625 relocation. */
5626
5627 static asection *
5628 ppc64_elf_gc_mark_hook (asection *sec,
5629 struct bfd_link_info *info,
5630 Elf_Internal_Rela *rel,
5631 struct elf_link_hash_entry *h,
5632 Elf_Internal_Sym *sym)
5633 {
5634 asection *rsec;
5635
5636 /* Syms return NULL if we're marking .opd, so we avoid marking all
5637 function sections, as all functions are referenced in .opd. */
5638 rsec = NULL;
5639 if (get_opd_info (sec) != NULL)
5640 return rsec;
5641
5642 if (h != NULL)
5643 {
5644 enum elf_ppc64_reloc_type r_type;
5645 struct ppc_link_hash_entry *eh, *fh, *fdh;
5646
5647 r_type = ELF64_R_TYPE (rel->r_info);
5648 switch (r_type)
5649 {
5650 case R_PPC64_GNU_VTINHERIT:
5651 case R_PPC64_GNU_VTENTRY:
5652 break;
5653
5654 default:
5655 switch (h->root.type)
5656 {
5657 case bfd_link_hash_defined:
5658 case bfd_link_hash_defweak:
5659 eh = (struct ppc_link_hash_entry *) h;
5660 fdh = defined_func_desc (eh);
5661 if (fdh != NULL)
5662 eh = fdh;
5663
5664 /* Function descriptor syms cause the associated
5665 function code sym section to be marked. */
5666 fh = defined_code_entry (eh);
5667 if (fh != NULL)
5668 {
5669 /* They also mark their opd section. */
5670 eh->elf.root.u.def.section->gc_mark = 1;
5671
5672 rsec = fh->elf.root.u.def.section;
5673 }
5674 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5675 && opd_entry_value (eh->elf.root.u.def.section,
5676 eh->elf.root.u.def.value,
5677 &rsec, NULL) != (bfd_vma) -1)
5678 eh->elf.root.u.def.section->gc_mark = 1;
5679 else
5680 rsec = h->root.u.def.section;
5681 break;
5682
5683 case bfd_link_hash_common:
5684 rsec = h->root.u.c.p->section;
5685 break;
5686
5687 default:
5688 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5689 }
5690 }
5691 }
5692 else
5693 {
5694 struct _opd_sec_data *opd;
5695
5696 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5697 opd = get_opd_info (rsec);
5698 if (opd != NULL && opd->func_sec != NULL)
5699 {
5700 rsec->gc_mark = 1;
5701
5702 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5703 }
5704 }
5705
5706 return rsec;
5707 }
5708
5709 /* Update the .got, .plt. and dynamic reloc reference counts for the
5710 section being removed. */
5711
5712 static bfd_boolean
5713 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5714 asection *sec, const Elf_Internal_Rela *relocs)
5715 {
5716 struct ppc_link_hash_table *htab;
5717 Elf_Internal_Shdr *symtab_hdr;
5718 struct elf_link_hash_entry **sym_hashes;
5719 struct got_entry **local_got_ents;
5720 const Elf_Internal_Rela *rel, *relend;
5721
5722 if (info->relocatable)
5723 return TRUE;
5724
5725 if ((sec->flags & SEC_ALLOC) == 0)
5726 return TRUE;
5727
5728 elf_section_data (sec)->local_dynrel = NULL;
5729
5730 htab = ppc_hash_table (info);
5731 symtab_hdr = &elf_symtab_hdr (abfd);
5732 sym_hashes = elf_sym_hashes (abfd);
5733 local_got_ents = elf_local_got_ents (abfd);
5734
5735 relend = relocs + sec->reloc_count;
5736 for (rel = relocs; rel < relend; rel++)
5737 {
5738 unsigned long r_symndx;
5739 enum elf_ppc64_reloc_type r_type;
5740 struct elf_link_hash_entry *h = NULL;
5741 char tls_type = 0;
5742
5743 r_symndx = ELF64_R_SYM (rel->r_info);
5744 r_type = ELF64_R_TYPE (rel->r_info);
5745 if (r_symndx >= symtab_hdr->sh_info)
5746 {
5747 struct ppc_link_hash_entry *eh;
5748 struct ppc_dyn_relocs **pp;
5749 struct ppc_dyn_relocs *p;
5750
5751 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5752 h = elf_follow_link (h);
5753 eh = (struct ppc_link_hash_entry *) h;
5754
5755 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5756 if (p->sec == sec)
5757 {
5758 /* Everything must go for SEC. */
5759 *pp = p->next;
5760 break;
5761 }
5762 }
5763
5764 if (is_branch_reloc (r_type))
5765 {
5766 struct plt_entry **ifunc = NULL;
5767 if (h != NULL)
5768 {
5769 if (h->type == STT_GNU_IFUNC)
5770 ifunc = &h->plt.plist;
5771 }
5772 else if (local_got_ents != NULL)
5773 {
5774 struct plt_entry **local_plt = (struct plt_entry **)
5775 (local_got_ents + symtab_hdr->sh_info);
5776 char *local_got_tls_masks = (char *)
5777 (local_plt + symtab_hdr->sh_info);
5778 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5779 ifunc = local_plt + r_symndx;
5780 }
5781 if (ifunc != NULL)
5782 {
5783 struct plt_entry *ent;
5784
5785 for (ent = *ifunc; ent != NULL; ent = ent->next)
5786 if (ent->addend == rel->r_addend)
5787 break;
5788 if (ent == NULL)
5789 abort ();
5790 if (ent->plt.refcount > 0)
5791 ent->plt.refcount -= 1;
5792 continue;
5793 }
5794 }
5795
5796 switch (r_type)
5797 {
5798 case R_PPC64_GOT_TLSLD16:
5799 case R_PPC64_GOT_TLSLD16_LO:
5800 case R_PPC64_GOT_TLSLD16_HI:
5801 case R_PPC64_GOT_TLSLD16_HA:
5802 tls_type = TLS_TLS | TLS_LD;
5803 goto dogot;
5804
5805 case R_PPC64_GOT_TLSGD16:
5806 case R_PPC64_GOT_TLSGD16_LO:
5807 case R_PPC64_GOT_TLSGD16_HI:
5808 case R_PPC64_GOT_TLSGD16_HA:
5809 tls_type = TLS_TLS | TLS_GD;
5810 goto dogot;
5811
5812 case R_PPC64_GOT_TPREL16_DS:
5813 case R_PPC64_GOT_TPREL16_LO_DS:
5814 case R_PPC64_GOT_TPREL16_HI:
5815 case R_PPC64_GOT_TPREL16_HA:
5816 tls_type = TLS_TLS | TLS_TPREL;
5817 goto dogot;
5818
5819 case R_PPC64_GOT_DTPREL16_DS:
5820 case R_PPC64_GOT_DTPREL16_LO_DS:
5821 case R_PPC64_GOT_DTPREL16_HI:
5822 case R_PPC64_GOT_DTPREL16_HA:
5823 tls_type = TLS_TLS | TLS_DTPREL;
5824 goto dogot;
5825
5826 case R_PPC64_GOT16:
5827 case R_PPC64_GOT16_DS:
5828 case R_PPC64_GOT16_HA:
5829 case R_PPC64_GOT16_HI:
5830 case R_PPC64_GOT16_LO:
5831 case R_PPC64_GOT16_LO_DS:
5832 dogot:
5833 {
5834 struct got_entry *ent;
5835
5836 if (h != NULL)
5837 ent = h->got.glist;
5838 else
5839 ent = local_got_ents[r_symndx];
5840
5841 for (; ent != NULL; ent = ent->next)
5842 if (ent->addend == rel->r_addend
5843 && ent->owner == abfd
5844 && ent->tls_type == tls_type)
5845 break;
5846 if (ent == NULL)
5847 abort ();
5848 if (ent->got.refcount > 0)
5849 ent->got.refcount -= 1;
5850 }
5851 break;
5852
5853 case R_PPC64_PLT16_HA:
5854 case R_PPC64_PLT16_HI:
5855 case R_PPC64_PLT16_LO:
5856 case R_PPC64_PLT32:
5857 case R_PPC64_PLT64:
5858 case R_PPC64_REL14:
5859 case R_PPC64_REL14_BRNTAKEN:
5860 case R_PPC64_REL14_BRTAKEN:
5861 case R_PPC64_REL24:
5862 if (h != NULL)
5863 {
5864 struct plt_entry *ent;
5865
5866 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5867 if (ent->addend == rel->r_addend)
5868 break;
5869 if (ent != NULL && ent->plt.refcount > 0)
5870 ent->plt.refcount -= 1;
5871 }
5872 break;
5873
5874 default:
5875 break;
5876 }
5877 }
5878 return TRUE;
5879 }
5880
5881 /* The maximum size of .sfpr. */
5882 #define SFPR_MAX (218*4)
5883
5884 struct sfpr_def_parms
5885 {
5886 const char name[12];
5887 unsigned char lo, hi;
5888 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5889 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5890 };
5891
5892 /* Auto-generate _save*, _rest* functions in .sfpr. */
5893
5894 static unsigned int
5895 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5896 {
5897 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5898 unsigned int i;
5899 size_t len = strlen (parm->name);
5900 bfd_boolean writing = FALSE;
5901 char sym[16];
5902
5903 memcpy (sym, parm->name, len);
5904 sym[len + 2] = 0;
5905
5906 for (i = parm->lo; i <= parm->hi; i++)
5907 {
5908 struct elf_link_hash_entry *h;
5909
5910 sym[len + 0] = i / 10 + '0';
5911 sym[len + 1] = i % 10 + '0';
5912 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5913 if (h != NULL
5914 && !h->def_regular)
5915 {
5916 h->root.type = bfd_link_hash_defined;
5917 h->root.u.def.section = htab->sfpr;
5918 h->root.u.def.value = htab->sfpr->size;
5919 h->type = STT_FUNC;
5920 h->def_regular = 1;
5921 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5922 writing = TRUE;
5923 if (htab->sfpr->contents == NULL)
5924 {
5925 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5926 if (htab->sfpr->contents == NULL)
5927 return FALSE;
5928 }
5929 }
5930 if (writing)
5931 {
5932 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5933 if (i != parm->hi)
5934 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5935 else
5936 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5937 htab->sfpr->size = p - htab->sfpr->contents;
5938 }
5939 }
5940
5941 return TRUE;
5942 }
5943
5944 static bfd_byte *
5945 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5946 {
5947 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5948 return p + 4;
5949 }
5950
5951 static bfd_byte *
5952 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5953 {
5954 p = savegpr0 (abfd, p, r);
5955 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5956 p = p + 4;
5957 bfd_put_32 (abfd, BLR, p);
5958 return p + 4;
5959 }
5960
5961 static bfd_byte *
5962 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5963 {
5964 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5965 return p + 4;
5966 }
5967
5968 static bfd_byte *
5969 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5970 {
5971 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5972 p = p + 4;
5973 p = restgpr0 (abfd, p, r);
5974 bfd_put_32 (abfd, MTLR_R0, p);
5975 p = p + 4;
5976 if (r == 29)
5977 {
5978 p = restgpr0 (abfd, p, 30);
5979 p = restgpr0 (abfd, p, 31);
5980 }
5981 bfd_put_32 (abfd, BLR, p);
5982 return p + 4;
5983 }
5984
5985 static bfd_byte *
5986 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5987 {
5988 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5989 return p + 4;
5990 }
5991
5992 static bfd_byte *
5993 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5994 {
5995 p = savegpr1 (abfd, p, r);
5996 bfd_put_32 (abfd, BLR, p);
5997 return p + 4;
5998 }
5999
6000 static bfd_byte *
6001 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6002 {
6003 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6004 return p + 4;
6005 }
6006
6007 static bfd_byte *
6008 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6009 {
6010 p = restgpr1 (abfd, p, r);
6011 bfd_put_32 (abfd, BLR, p);
6012 return p + 4;
6013 }
6014
6015 static bfd_byte *
6016 savefpr (bfd *abfd, bfd_byte *p, int r)
6017 {
6018 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6019 return p + 4;
6020 }
6021
6022 static bfd_byte *
6023 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6024 {
6025 p = savefpr (abfd, p, r);
6026 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6027 p = p + 4;
6028 bfd_put_32 (abfd, BLR, p);
6029 return p + 4;
6030 }
6031
6032 static bfd_byte *
6033 restfpr (bfd *abfd, bfd_byte *p, int r)
6034 {
6035 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6036 return p + 4;
6037 }
6038
6039 static bfd_byte *
6040 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6041 {
6042 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6043 p = p + 4;
6044 p = restfpr (abfd, p, r);
6045 bfd_put_32 (abfd, MTLR_R0, p);
6046 p = p + 4;
6047 if (r == 29)
6048 {
6049 p = restfpr (abfd, p, 30);
6050 p = restfpr (abfd, p, 31);
6051 }
6052 bfd_put_32 (abfd, BLR, p);
6053 return p + 4;
6054 }
6055
6056 static bfd_byte *
6057 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6058 {
6059 p = savefpr (abfd, p, r);
6060 bfd_put_32 (abfd, BLR, p);
6061 return p + 4;
6062 }
6063
6064 static bfd_byte *
6065 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6066 {
6067 p = restfpr (abfd, p, r);
6068 bfd_put_32 (abfd, BLR, p);
6069 return p + 4;
6070 }
6071
6072 static bfd_byte *
6073 savevr (bfd *abfd, bfd_byte *p, int r)
6074 {
6075 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6076 p = p + 4;
6077 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6078 return p + 4;
6079 }
6080
6081 static bfd_byte *
6082 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6083 {
6084 p = savevr (abfd, p, r);
6085 bfd_put_32 (abfd, BLR, p);
6086 return p + 4;
6087 }
6088
6089 static bfd_byte *
6090 restvr (bfd *abfd, bfd_byte *p, int r)
6091 {
6092 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6093 p = p + 4;
6094 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6095 return p + 4;
6096 }
6097
6098 static bfd_byte *
6099 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6100 {
6101 p = restvr (abfd, p, r);
6102 bfd_put_32 (abfd, BLR, p);
6103 return p + 4;
6104 }
6105
6106 /* Called via elf_link_hash_traverse to transfer dynamic linking
6107 information on function code symbol entries to their corresponding
6108 function descriptor symbol entries. */
6109
6110 static bfd_boolean
6111 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6112 {
6113 struct bfd_link_info *info;
6114 struct ppc_link_hash_table *htab;
6115 struct plt_entry *ent;
6116 struct ppc_link_hash_entry *fh;
6117 struct ppc_link_hash_entry *fdh;
6118 bfd_boolean force_local;
6119
6120 fh = (struct ppc_link_hash_entry *) h;
6121 if (fh->elf.root.type == bfd_link_hash_indirect)
6122 return TRUE;
6123
6124 if (fh->elf.root.type == bfd_link_hash_warning)
6125 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6126
6127 info = inf;
6128 htab = ppc_hash_table (info);
6129
6130 /* Resolve undefined references to dot-symbols as the value
6131 in the function descriptor, if we have one in a regular object.
6132 This is to satisfy cases like ".quad .foo". Calls to functions
6133 in dynamic objects are handled elsewhere. */
6134 if (fh->elf.root.type == bfd_link_hash_undefweak
6135 && fh->was_undefined
6136 && (fdh = defined_func_desc (fh)) != NULL
6137 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6138 && opd_entry_value (fdh->elf.root.u.def.section,
6139 fdh->elf.root.u.def.value,
6140 &fh->elf.root.u.def.section,
6141 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6142 {
6143 fh->elf.root.type = fdh->elf.root.type;
6144 fh->elf.forced_local = 1;
6145 fh->elf.def_regular = fdh->elf.def_regular;
6146 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6147 }
6148
6149 /* If this is a function code symbol, transfer dynamic linking
6150 information to the function descriptor symbol. */
6151 if (!fh->is_func)
6152 return TRUE;
6153
6154 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6155 if (ent->plt.refcount > 0)
6156 break;
6157 if (ent == NULL
6158 || fh->elf.root.root.string[0] != '.'
6159 || fh->elf.root.root.string[1] == '\0')
6160 return TRUE;
6161
6162 /* Find the corresponding function descriptor symbol. Create it
6163 as undefined if necessary. */
6164
6165 fdh = lookup_fdh (fh, htab);
6166 if (fdh == NULL
6167 && !info->executable
6168 && (fh->elf.root.type == bfd_link_hash_undefined
6169 || fh->elf.root.type == bfd_link_hash_undefweak))
6170 {
6171 fdh = make_fdh (info, fh);
6172 if (fdh == NULL)
6173 return FALSE;
6174 }
6175
6176 /* Fake function descriptors are made undefweak. If the function
6177 code symbol is strong undefined, make the fake sym the same.
6178 If the function code symbol is defined, then force the fake
6179 descriptor local; We can't support overriding of symbols in a
6180 shared library on a fake descriptor. */
6181
6182 if (fdh != NULL
6183 && fdh->fake
6184 && fdh->elf.root.type == bfd_link_hash_undefweak)
6185 {
6186 if (fh->elf.root.type == bfd_link_hash_undefined)
6187 {
6188 fdh->elf.root.type = bfd_link_hash_undefined;
6189 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6190 }
6191 else if (fh->elf.root.type == bfd_link_hash_defined
6192 || fh->elf.root.type == bfd_link_hash_defweak)
6193 {
6194 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6195 }
6196 }
6197
6198 if (fdh != NULL
6199 && !fdh->elf.forced_local
6200 && (!info->executable
6201 || fdh->elf.def_dynamic
6202 || fdh->elf.ref_dynamic
6203 || (fdh->elf.root.type == bfd_link_hash_undefweak
6204 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6205 {
6206 if (fdh->elf.dynindx == -1)
6207 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6208 return FALSE;
6209 fdh->elf.ref_regular |= fh->elf.ref_regular;
6210 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6211 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6212 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6213 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6214 {
6215 move_plt_plist (fh, fdh);
6216 fdh->elf.needs_plt = 1;
6217 }
6218 fdh->is_func_descriptor = 1;
6219 fdh->oh = fh;
6220 fh->oh = fdh;
6221 }
6222
6223 /* Now that the info is on the function descriptor, clear the
6224 function code sym info. Any function code syms for which we
6225 don't have a definition in a regular file, we force local.
6226 This prevents a shared library from exporting syms that have
6227 been imported from another library. Function code syms that
6228 are really in the library we must leave global to prevent the
6229 linker dragging in a definition from a static library. */
6230 force_local = (!fh->elf.def_regular
6231 || fdh == NULL
6232 || !fdh->elf.def_regular
6233 || fdh->elf.forced_local);
6234 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6235
6236 return TRUE;
6237 }
6238
6239 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6240 this hook to a) provide some gcc support functions, and b) transfer
6241 dynamic linking information gathered so far on function code symbol
6242 entries, to their corresponding function descriptor symbol entries. */
6243
6244 static bfd_boolean
6245 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6246 struct bfd_link_info *info)
6247 {
6248 struct ppc_link_hash_table *htab;
6249 unsigned int i;
6250 const struct sfpr_def_parms funcs[] =
6251 {
6252 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6253 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6254 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6255 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6256 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6257 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6258 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6259 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6260 { "._savef", 14, 31, savefpr, savefpr1_tail },
6261 { "._restf", 14, 31, restfpr, restfpr1_tail },
6262 { "_savevr_", 20, 31, savevr, savevr_tail },
6263 { "_restvr_", 20, 31, restvr, restvr_tail }
6264 };
6265
6266 htab = ppc_hash_table (info);
6267 if (htab->sfpr == NULL)
6268 /* We don't have any relocs. */
6269 return TRUE;
6270
6271 /* Provide any missing _save* and _rest* functions. */
6272 htab->sfpr->size = 0;
6273 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6274 if (!sfpr_define (info, &funcs[i]))
6275 return FALSE;
6276
6277 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6278
6279 if (htab->sfpr->size == 0)
6280 htab->sfpr->flags |= SEC_EXCLUDE;
6281
6282 return TRUE;
6283 }
6284
6285 /* Adjust a symbol defined by a dynamic object and referenced by a
6286 regular object. The current definition is in some section of the
6287 dynamic object, but we're not including those sections. We have to
6288 change the definition to something the rest of the link can
6289 understand. */
6290
6291 static bfd_boolean
6292 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6293 struct elf_link_hash_entry *h)
6294 {
6295 struct ppc_link_hash_table *htab;
6296 asection *s;
6297
6298 htab = ppc_hash_table (info);
6299
6300 /* Deal with function syms. */
6301 if (h->type == STT_FUNC
6302 || h->type == STT_GNU_IFUNC
6303 || h->needs_plt)
6304 {
6305 /* Clear procedure linkage table information for any symbol that
6306 won't need a .plt entry. */
6307 struct plt_entry *ent;
6308 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6309 if (ent->plt.refcount > 0)
6310 break;
6311 if (ent == NULL
6312 || (h->type != STT_GNU_IFUNC
6313 && (SYMBOL_CALLS_LOCAL (info, h)
6314 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6315 && h->root.type == bfd_link_hash_undefweak))))
6316 {
6317 h->plt.plist = NULL;
6318 h->needs_plt = 0;
6319 }
6320 }
6321 else
6322 h->plt.plist = NULL;
6323
6324 /* If this is a weak symbol, and there is a real definition, the
6325 processor independent code will have arranged for us to see the
6326 real definition first, and we can just use the same value. */
6327 if (h->u.weakdef != NULL)
6328 {
6329 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6330 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6331 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6332 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6333 if (ELIMINATE_COPY_RELOCS)
6334 h->non_got_ref = h->u.weakdef->non_got_ref;
6335 return TRUE;
6336 }
6337
6338 /* If we are creating a shared library, we must presume that the
6339 only references to the symbol are via the global offset table.
6340 For such cases we need not do anything here; the relocations will
6341 be handled correctly by relocate_section. */
6342 if (info->shared)
6343 return TRUE;
6344
6345 /* If there are no references to this symbol that do not use the
6346 GOT, we don't need to generate a copy reloc. */
6347 if (!h->non_got_ref)
6348 return TRUE;
6349
6350 /* Don't generate a copy reloc for symbols defined in the executable. */
6351 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6352 return TRUE;
6353
6354 if (ELIMINATE_COPY_RELOCS)
6355 {
6356 struct ppc_link_hash_entry * eh;
6357 struct ppc_dyn_relocs *p;
6358
6359 eh = (struct ppc_link_hash_entry *) h;
6360 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6361 {
6362 s = p->sec->output_section;
6363 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6364 break;
6365 }
6366
6367 /* If we didn't find any dynamic relocs in read-only sections, then
6368 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6369 if (p == NULL)
6370 {
6371 h->non_got_ref = 0;
6372 return TRUE;
6373 }
6374 }
6375
6376 if (h->plt.plist != NULL)
6377 {
6378 /* We should never get here, but unfortunately there are versions
6379 of gcc out there that improperly (for this ABI) put initialized
6380 function pointers, vtable refs and suchlike in read-only
6381 sections. Allow them to proceed, but warn that this might
6382 break at runtime. */
6383 (*_bfd_error_handler)
6384 (_("copy reloc against `%s' requires lazy plt linking; "
6385 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6386 h->root.root.string);
6387 }
6388
6389 /* This is a reference to a symbol defined by a dynamic object which
6390 is not a function. */
6391
6392 if (h->size == 0)
6393 {
6394 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6395 h->root.root.string);
6396 return TRUE;
6397 }
6398
6399 /* We must allocate the symbol in our .dynbss section, which will
6400 become part of the .bss section of the executable. There will be
6401 an entry for this symbol in the .dynsym section. The dynamic
6402 object will contain position independent code, so all references
6403 from the dynamic object to this symbol will go through the global
6404 offset table. The dynamic linker will use the .dynsym entry to
6405 determine the address it must put in the global offset table, so
6406 both the dynamic object and the regular object will refer to the
6407 same memory location for the variable. */
6408
6409 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6410 to copy the initial value out of the dynamic object and into the
6411 runtime process image. We need to remember the offset into the
6412 .rela.bss section we are going to use. */
6413 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6414 {
6415 htab->relbss->size += sizeof (Elf64_External_Rela);
6416 h->needs_copy = 1;
6417 }
6418
6419 s = htab->dynbss;
6420
6421 return _bfd_elf_adjust_dynamic_copy (h, s);
6422 }
6423
6424 /* If given a function descriptor symbol, hide both the function code
6425 sym and the descriptor. */
6426 static void
6427 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6428 struct elf_link_hash_entry *h,
6429 bfd_boolean force_local)
6430 {
6431 struct ppc_link_hash_entry *eh;
6432 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6433
6434 eh = (struct ppc_link_hash_entry *) h;
6435 if (eh->is_func_descriptor)
6436 {
6437 struct ppc_link_hash_entry *fh = eh->oh;
6438
6439 if (fh == NULL)
6440 {
6441 const char *p, *q;
6442 struct ppc_link_hash_table *htab;
6443 char save;
6444
6445 /* We aren't supposed to use alloca in BFD because on
6446 systems which do not have alloca the version in libiberty
6447 calls xmalloc, which might cause the program to crash
6448 when it runs out of memory. This function doesn't have a
6449 return status, so there's no way to gracefully return an
6450 error. So cheat. We know that string[-1] can be safely
6451 accessed; It's either a string in an ELF string table,
6452 or allocated in an objalloc structure. */
6453
6454 p = eh->elf.root.root.string - 1;
6455 save = *p;
6456 *(char *) p = '.';
6457 htab = ppc_hash_table (info);
6458 fh = (struct ppc_link_hash_entry *)
6459 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6460 *(char *) p = save;
6461
6462 /* Unfortunately, if it so happens that the string we were
6463 looking for was allocated immediately before this string,
6464 then we overwrote the string terminator. That's the only
6465 reason the lookup should fail. */
6466 if (fh == NULL)
6467 {
6468 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6469 while (q >= eh->elf.root.root.string && *q == *p)
6470 --q, --p;
6471 if (q < eh->elf.root.root.string && *p == '.')
6472 fh = (struct ppc_link_hash_entry *)
6473 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6474 }
6475 if (fh != NULL)
6476 {
6477 eh->oh = fh;
6478 fh->oh = eh;
6479 }
6480 }
6481 if (fh != NULL)
6482 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6483 }
6484 }
6485
6486 static bfd_boolean
6487 get_sym_h (struct elf_link_hash_entry **hp,
6488 Elf_Internal_Sym **symp,
6489 asection **symsecp,
6490 char **tls_maskp,
6491 Elf_Internal_Sym **locsymsp,
6492 unsigned long r_symndx,
6493 bfd *ibfd)
6494 {
6495 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6496
6497 if (r_symndx >= symtab_hdr->sh_info)
6498 {
6499 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6500 struct elf_link_hash_entry *h;
6501
6502 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6503 h = elf_follow_link (h);
6504
6505 if (hp != NULL)
6506 *hp = h;
6507
6508 if (symp != NULL)
6509 *symp = NULL;
6510
6511 if (symsecp != NULL)
6512 {
6513 asection *symsec = NULL;
6514 if (h->root.type == bfd_link_hash_defined
6515 || h->root.type == bfd_link_hash_defweak)
6516 symsec = h->root.u.def.section;
6517 *symsecp = symsec;
6518 }
6519
6520 if (tls_maskp != NULL)
6521 {
6522 struct ppc_link_hash_entry *eh;
6523
6524 eh = (struct ppc_link_hash_entry *) h;
6525 *tls_maskp = &eh->tls_mask;
6526 }
6527 }
6528 else
6529 {
6530 Elf_Internal_Sym *sym;
6531 Elf_Internal_Sym *locsyms = *locsymsp;
6532
6533 if (locsyms == NULL)
6534 {
6535 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6536 if (locsyms == NULL)
6537 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6538 symtab_hdr->sh_info,
6539 0, NULL, NULL, NULL);
6540 if (locsyms == NULL)
6541 return FALSE;
6542 *locsymsp = locsyms;
6543 }
6544 sym = locsyms + r_symndx;
6545
6546 if (hp != NULL)
6547 *hp = NULL;
6548
6549 if (symp != NULL)
6550 *symp = sym;
6551
6552 if (symsecp != NULL)
6553 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6554
6555 if (tls_maskp != NULL)
6556 {
6557 struct got_entry **lgot_ents;
6558 char *tls_mask;
6559
6560 tls_mask = NULL;
6561 lgot_ents = elf_local_got_ents (ibfd);
6562 if (lgot_ents != NULL)
6563 {
6564 struct plt_entry **local_plt = (struct plt_entry **)
6565 (lgot_ents + symtab_hdr->sh_info);
6566 char *lgot_masks = (char *)
6567 (local_plt + symtab_hdr->sh_info);
6568 tls_mask = &lgot_masks[r_symndx];
6569 }
6570 *tls_maskp = tls_mask;
6571 }
6572 }
6573 return TRUE;
6574 }
6575
6576 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6577 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6578 type suitable for optimization, and 1 otherwise. */
6579
6580 static int
6581 get_tls_mask (char **tls_maskp,
6582 unsigned long *toc_symndx,
6583 bfd_vma *toc_addend,
6584 Elf_Internal_Sym **locsymsp,
6585 const Elf_Internal_Rela *rel,
6586 bfd *ibfd)
6587 {
6588 unsigned long r_symndx;
6589 int next_r;
6590 struct elf_link_hash_entry *h;
6591 Elf_Internal_Sym *sym;
6592 asection *sec;
6593 bfd_vma off;
6594
6595 r_symndx = ELF64_R_SYM (rel->r_info);
6596 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6597 return 0;
6598
6599 if ((*tls_maskp != NULL && **tls_maskp != 0)
6600 || sec == NULL
6601 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6602 return 1;
6603
6604 /* Look inside a TOC section too. */
6605 if (h != NULL)
6606 {
6607 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6608 off = h->root.u.def.value;
6609 }
6610 else
6611 off = sym->st_value;
6612 off += rel->r_addend;
6613 BFD_ASSERT (off % 8 == 0);
6614 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6615 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6616 if (toc_symndx != NULL)
6617 *toc_symndx = r_symndx;
6618 if (toc_addend != NULL)
6619 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6620 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6621 return 0;
6622 if ((h == NULL
6623 || ((h->root.type == bfd_link_hash_defined
6624 || h->root.type == bfd_link_hash_defweak)
6625 && !h->def_dynamic))
6626 && (next_r == -1 || next_r == -2))
6627 return 1 - next_r;
6628 return 1;
6629 }
6630
6631 /* Adjust all global syms defined in opd sections. In gcc generated
6632 code for the old ABI, these will already have been done. */
6633
6634 static bfd_boolean
6635 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6636 {
6637 struct ppc_link_hash_entry *eh;
6638 asection *sym_sec;
6639 struct _opd_sec_data *opd;
6640
6641 if (h->root.type == bfd_link_hash_indirect)
6642 return TRUE;
6643
6644 if (h->root.type == bfd_link_hash_warning)
6645 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6646
6647 if (h->root.type != bfd_link_hash_defined
6648 && h->root.type != bfd_link_hash_defweak)
6649 return TRUE;
6650
6651 eh = (struct ppc_link_hash_entry *) h;
6652 if (eh->adjust_done)
6653 return TRUE;
6654
6655 sym_sec = eh->elf.root.u.def.section;
6656 opd = get_opd_info (sym_sec);
6657 if (opd != NULL && opd->adjust != NULL)
6658 {
6659 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6660 if (adjust == -1)
6661 {
6662 /* This entry has been deleted. */
6663 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6664 if (dsec == NULL)
6665 {
6666 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6667 if (elf_discarded_section (dsec))
6668 {
6669 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6670 break;
6671 }
6672 }
6673 eh->elf.root.u.def.value = 0;
6674 eh->elf.root.u.def.section = dsec;
6675 }
6676 else
6677 eh->elf.root.u.def.value += adjust;
6678 eh->adjust_done = 1;
6679 }
6680 return TRUE;
6681 }
6682
6683 /* Handles decrementing dynamic reloc counts for the reloc specified by
6684 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6685 have already been determined. */
6686
6687 static bfd_boolean
6688 dec_dynrel_count (bfd_vma r_info,
6689 asection *sec,
6690 struct bfd_link_info *info,
6691 Elf_Internal_Sym **local_syms,
6692 struct elf_link_hash_entry *h,
6693 asection *sym_sec)
6694 {
6695 enum elf_ppc64_reloc_type r_type;
6696 struct ppc_dyn_relocs *p;
6697 struct ppc_dyn_relocs **pp;
6698
6699 /* Can this reloc be dynamic? This switch, and later tests here
6700 should be kept in sync with the code in check_relocs. */
6701 r_type = ELF64_R_TYPE (r_info);
6702 switch (r_type)
6703 {
6704 default:
6705 return TRUE;
6706
6707 case R_PPC64_TPREL16:
6708 case R_PPC64_TPREL16_LO:
6709 case R_PPC64_TPREL16_HI:
6710 case R_PPC64_TPREL16_HA:
6711 case R_PPC64_TPREL16_DS:
6712 case R_PPC64_TPREL16_LO_DS:
6713 case R_PPC64_TPREL16_HIGHER:
6714 case R_PPC64_TPREL16_HIGHERA:
6715 case R_PPC64_TPREL16_HIGHEST:
6716 case R_PPC64_TPREL16_HIGHESTA:
6717 if (!info->shared)
6718 return TRUE;
6719
6720 case R_PPC64_TPREL64:
6721 case R_PPC64_DTPMOD64:
6722 case R_PPC64_DTPREL64:
6723 case R_PPC64_ADDR64:
6724 case R_PPC64_REL30:
6725 case R_PPC64_REL32:
6726 case R_PPC64_REL64:
6727 case R_PPC64_ADDR14:
6728 case R_PPC64_ADDR14_BRNTAKEN:
6729 case R_PPC64_ADDR14_BRTAKEN:
6730 case R_PPC64_ADDR16:
6731 case R_PPC64_ADDR16_DS:
6732 case R_PPC64_ADDR16_HA:
6733 case R_PPC64_ADDR16_HI:
6734 case R_PPC64_ADDR16_HIGHER:
6735 case R_PPC64_ADDR16_HIGHERA:
6736 case R_PPC64_ADDR16_HIGHEST:
6737 case R_PPC64_ADDR16_HIGHESTA:
6738 case R_PPC64_ADDR16_LO:
6739 case R_PPC64_ADDR16_LO_DS:
6740 case R_PPC64_ADDR24:
6741 case R_PPC64_ADDR32:
6742 case R_PPC64_UADDR16:
6743 case R_PPC64_UADDR32:
6744 case R_PPC64_UADDR64:
6745 case R_PPC64_TOC:
6746 break;
6747 }
6748
6749 if (local_syms != NULL)
6750 {
6751 unsigned long r_symndx;
6752 Elf_Internal_Sym *sym;
6753 bfd *ibfd = sec->owner;
6754
6755 r_symndx = ELF64_R_SYM (r_info);
6756 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6757 return FALSE;
6758 }
6759
6760 if ((info->shared
6761 && (must_be_dyn_reloc (info, r_type)
6762 || (h != NULL
6763 && (!info->symbolic
6764 || h->root.type == bfd_link_hash_defweak
6765 || !h->def_regular))))
6766 || (ELIMINATE_COPY_RELOCS
6767 && !info->shared
6768 && h != NULL
6769 && (h->root.type == bfd_link_hash_defweak
6770 || !h->def_regular)))
6771 ;
6772 else
6773 return TRUE;
6774
6775 if (h != NULL)
6776 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6777 else
6778 {
6779 if (sym_sec != NULL)
6780 {
6781 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6782 pp = (struct ppc_dyn_relocs **) vpp;
6783 }
6784 else
6785 {
6786 void *vpp = &elf_section_data (sec)->local_dynrel;
6787 pp = (struct ppc_dyn_relocs **) vpp;
6788 }
6789
6790 /* elf_gc_sweep may have already removed all dyn relocs associated
6791 with local syms for a given section. Don't report a dynreloc
6792 miscount. */
6793 if (*pp == NULL)
6794 return TRUE;
6795 }
6796
6797 while ((p = *pp) != NULL)
6798 {
6799 if (p->sec == sec)
6800 {
6801 if (!must_be_dyn_reloc (info, r_type))
6802 p->pc_count -= 1;
6803 p->count -= 1;
6804 if (p->count == 0)
6805 *pp = p->next;
6806 return TRUE;
6807 }
6808 pp = &p->next;
6809 }
6810
6811 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6812 sec->owner, sec);
6813 bfd_set_error (bfd_error_bad_value);
6814 return FALSE;
6815 }
6816
6817 /* Remove unused Official Procedure Descriptor entries. Currently we
6818 only remove those associated with functions in discarded link-once
6819 sections, or weakly defined functions that have been overridden. It
6820 would be possible to remove many more entries for statically linked
6821 applications. */
6822
6823 bfd_boolean
6824 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6825 bfd_boolean non_overlapping)
6826 {
6827 bfd *ibfd;
6828 bfd_boolean some_edited = FALSE;
6829 asection *need_pad = NULL;
6830
6831 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6832 {
6833 asection *sec;
6834 Elf_Internal_Rela *relstart, *rel, *relend;
6835 Elf_Internal_Shdr *symtab_hdr;
6836 Elf_Internal_Sym *local_syms;
6837 struct elf_link_hash_entry **sym_hashes;
6838 bfd_vma offset;
6839 struct _opd_sec_data *opd;
6840 bfd_boolean need_edit, add_aux_fields;
6841 bfd_size_type cnt_16b = 0;
6842
6843 sec = bfd_get_section_by_name (ibfd, ".opd");
6844 if (sec == NULL || sec->size == 0)
6845 continue;
6846
6847 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6848 continue;
6849
6850 if (sec->output_section == bfd_abs_section_ptr)
6851 continue;
6852
6853 /* Look through the section relocs. */
6854 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6855 continue;
6856
6857 local_syms = NULL;
6858 symtab_hdr = &elf_symtab_hdr (ibfd);
6859 sym_hashes = elf_sym_hashes (ibfd);
6860
6861 /* Read the relocations. */
6862 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6863 info->keep_memory);
6864 if (relstart == NULL)
6865 return FALSE;
6866
6867 /* First run through the relocs to check they are sane, and to
6868 determine whether we need to edit this opd section. */
6869 need_edit = FALSE;
6870 need_pad = sec;
6871 offset = 0;
6872 relend = relstart + sec->reloc_count;
6873 for (rel = relstart; rel < relend; )
6874 {
6875 enum elf_ppc64_reloc_type r_type;
6876 unsigned long r_symndx;
6877 asection *sym_sec;
6878 struct elf_link_hash_entry *h;
6879 Elf_Internal_Sym *sym;
6880
6881 /* .opd contains a regular array of 16 or 24 byte entries. We're
6882 only interested in the reloc pointing to a function entry
6883 point. */
6884 if (rel->r_offset != offset
6885 || rel + 1 >= relend
6886 || (rel + 1)->r_offset != offset + 8)
6887 {
6888 /* If someone messes with .opd alignment then after a
6889 "ld -r" we might have padding in the middle of .opd.
6890 Also, there's nothing to prevent someone putting
6891 something silly in .opd with the assembler. No .opd
6892 optimization for them! */
6893 broken_opd:
6894 (*_bfd_error_handler)
6895 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6896 need_edit = FALSE;
6897 break;
6898 }
6899
6900 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6901 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6902 {
6903 (*_bfd_error_handler)
6904 (_("%B: unexpected reloc type %u in .opd section"),
6905 ibfd, r_type);
6906 need_edit = FALSE;
6907 break;
6908 }
6909
6910 r_symndx = ELF64_R_SYM (rel->r_info);
6911 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6912 r_symndx, ibfd))
6913 goto error_ret;
6914
6915 if (sym_sec == NULL || sym_sec->owner == NULL)
6916 {
6917 const char *sym_name;
6918 if (h != NULL)
6919 sym_name = h->root.root.string;
6920 else
6921 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6922 sym_sec);
6923
6924 (*_bfd_error_handler)
6925 (_("%B: undefined sym `%s' in .opd section"),
6926 ibfd, sym_name);
6927 need_edit = FALSE;
6928 break;
6929 }
6930
6931 /* opd entries are always for functions defined in the
6932 current input bfd. If the symbol isn't defined in the
6933 input bfd, then we won't be using the function in this
6934 bfd; It must be defined in a linkonce section in another
6935 bfd, or is weak. It's also possible that we are
6936 discarding the function due to a linker script /DISCARD/,
6937 which we test for via the output_section. */
6938 if (sym_sec->owner != ibfd
6939 || sym_sec->output_section == bfd_abs_section_ptr)
6940 need_edit = TRUE;
6941
6942 rel += 2;
6943 if (rel == relend
6944 || (rel + 1 == relend && rel->r_offset == offset + 16))
6945 {
6946 if (sec->size == offset + 24)
6947 {
6948 need_pad = NULL;
6949 break;
6950 }
6951 if (rel == relend && sec->size == offset + 16)
6952 {
6953 cnt_16b++;
6954 break;
6955 }
6956 goto broken_opd;
6957 }
6958
6959 if (rel->r_offset == offset + 24)
6960 offset += 24;
6961 else if (rel->r_offset != offset + 16)
6962 goto broken_opd;
6963 else if (rel + 1 < relend
6964 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6965 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6966 {
6967 offset += 16;
6968 cnt_16b++;
6969 }
6970 else if (rel + 2 < relend
6971 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6972 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6973 {
6974 offset += 24;
6975 rel += 1;
6976 }
6977 else
6978 goto broken_opd;
6979 }
6980
6981 add_aux_fields = non_overlapping && cnt_16b > 0;
6982
6983 if (need_edit || add_aux_fields)
6984 {
6985 Elf_Internal_Rela *write_rel;
6986 bfd_byte *rptr, *wptr;
6987 bfd_byte *new_contents;
6988 bfd_boolean skip;
6989 long opd_ent_size;
6990 bfd_size_type amt;
6991
6992 new_contents = NULL;
6993 amt = sec->size * sizeof (long) / 8;
6994 opd = &ppc64_elf_section_data (sec)->u.opd;
6995 opd->adjust = bfd_zalloc (obfd, amt);
6996 if (opd->adjust == NULL)
6997 return FALSE;
6998 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6999
7000 /* This seems a waste of time as input .opd sections are all
7001 zeros as generated by gcc, but I suppose there's no reason
7002 this will always be so. We might start putting something in
7003 the third word of .opd entries. */
7004 if ((sec->flags & SEC_IN_MEMORY) == 0)
7005 {
7006 bfd_byte *loc;
7007 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7008 {
7009 if (loc != NULL)
7010 free (loc);
7011 error_ret:
7012 if (local_syms != NULL
7013 && symtab_hdr->contents != (unsigned char *) local_syms)
7014 free (local_syms);
7015 if (elf_section_data (sec)->relocs != relstart)
7016 free (relstart);
7017 return FALSE;
7018 }
7019 sec->contents = loc;
7020 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7021 }
7022
7023 elf_section_data (sec)->relocs = relstart;
7024
7025 new_contents = sec->contents;
7026 if (add_aux_fields)
7027 {
7028 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7029 if (new_contents == NULL)
7030 return FALSE;
7031 need_pad = FALSE;
7032 }
7033 wptr = new_contents;
7034 rptr = sec->contents;
7035
7036 write_rel = relstart;
7037 skip = FALSE;
7038 offset = 0;
7039 opd_ent_size = 0;
7040 for (rel = relstart; rel < relend; rel++)
7041 {
7042 unsigned long r_symndx;
7043 asection *sym_sec;
7044 struct elf_link_hash_entry *h;
7045 Elf_Internal_Sym *sym;
7046
7047 r_symndx = ELF64_R_SYM (rel->r_info);
7048 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7049 r_symndx, ibfd))
7050 goto error_ret;
7051
7052 if (rel->r_offset == offset)
7053 {
7054 struct ppc_link_hash_entry *fdh = NULL;
7055
7056 /* See if the .opd entry is full 24 byte or
7057 16 byte (with fd_aux entry overlapped with next
7058 fd_func). */
7059 opd_ent_size = 24;
7060 if ((rel + 2 == relend && sec->size == offset + 16)
7061 || (rel + 3 < relend
7062 && rel[2].r_offset == offset + 16
7063 && rel[3].r_offset == offset + 24
7064 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7065 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7066 opd_ent_size = 16;
7067
7068 if (h != NULL
7069 && h->root.root.string[0] == '.')
7070 {
7071 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7072 ppc_hash_table (info));
7073 if (fdh != NULL
7074 && fdh->elf.root.type != bfd_link_hash_defined
7075 && fdh->elf.root.type != bfd_link_hash_defweak)
7076 fdh = NULL;
7077 }
7078
7079 skip = (sym_sec->owner != ibfd
7080 || sym_sec->output_section == bfd_abs_section_ptr);
7081 if (skip)
7082 {
7083 if (fdh != NULL && sym_sec->owner == ibfd)
7084 {
7085 /* Arrange for the function descriptor sym
7086 to be dropped. */
7087 fdh->elf.root.u.def.value = 0;
7088 fdh->elf.root.u.def.section = sym_sec;
7089 }
7090 opd->adjust[rel->r_offset / 8] = -1;
7091 }
7092 else
7093 {
7094 /* We'll be keeping this opd entry. */
7095
7096 if (fdh != NULL)
7097 {
7098 /* Redefine the function descriptor symbol to
7099 this location in the opd section. It is
7100 necessary to update the value here rather
7101 than using an array of adjustments as we do
7102 for local symbols, because various places
7103 in the generic ELF code use the value
7104 stored in u.def.value. */
7105 fdh->elf.root.u.def.value = wptr - new_contents;
7106 fdh->adjust_done = 1;
7107 }
7108
7109 /* Local syms are a bit tricky. We could
7110 tweak them as they can be cached, but
7111 we'd need to look through the local syms
7112 for the function descriptor sym which we
7113 don't have at the moment. So keep an
7114 array of adjustments. */
7115 opd->adjust[rel->r_offset / 8]
7116 = (wptr - new_contents) - (rptr - sec->contents);
7117
7118 if (wptr != rptr)
7119 memcpy (wptr, rptr, opd_ent_size);
7120 wptr += opd_ent_size;
7121 if (add_aux_fields && opd_ent_size == 16)
7122 {
7123 memset (wptr, '\0', 8);
7124 wptr += 8;
7125 }
7126 }
7127 rptr += opd_ent_size;
7128 offset += opd_ent_size;
7129 }
7130
7131 if (skip)
7132 {
7133 if (!NO_OPD_RELOCS
7134 && !info->relocatable
7135 && !dec_dynrel_count (rel->r_info, sec, info,
7136 NULL, h, sym_sec))
7137 goto error_ret;
7138 }
7139 else
7140 {
7141 /* We need to adjust any reloc offsets to point to the
7142 new opd entries. While we're at it, we may as well
7143 remove redundant relocs. */
7144 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7145 if (write_rel != rel)
7146 memcpy (write_rel, rel, sizeof (*rel));
7147 ++write_rel;
7148 }
7149 }
7150
7151 sec->size = wptr - new_contents;
7152 sec->reloc_count = write_rel - relstart;
7153 if (add_aux_fields)
7154 {
7155 free (sec->contents);
7156 sec->contents = new_contents;
7157 }
7158
7159 /* Fudge the header size too, as this is used later in
7160 elf_bfd_final_link if we are emitting relocs. */
7161 elf_section_data (sec)->rel_hdr.sh_size
7162 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7163 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7164 some_edited = TRUE;
7165 }
7166 else if (elf_section_data (sec)->relocs != relstart)
7167 free (relstart);
7168
7169 if (local_syms != NULL
7170 && symtab_hdr->contents != (unsigned char *) local_syms)
7171 {
7172 if (!info->keep_memory)
7173 free (local_syms);
7174 else
7175 symtab_hdr->contents = (unsigned char *) local_syms;
7176 }
7177 }
7178
7179 if (some_edited)
7180 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7181
7182 /* If we are doing a final link and the last .opd entry is just 16 byte
7183 long, add a 8 byte padding after it. */
7184 if (need_pad != NULL && !info->relocatable)
7185 {
7186 bfd_byte *p;
7187
7188 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7189 {
7190 BFD_ASSERT (need_pad->size > 0);
7191
7192 p = bfd_malloc (need_pad->size + 8);
7193 if (p == NULL)
7194 return FALSE;
7195
7196 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7197 p, 0, need_pad->size))
7198 return FALSE;
7199
7200 need_pad->contents = p;
7201 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7202 }
7203 else
7204 {
7205 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7206 if (p == NULL)
7207 return FALSE;
7208
7209 need_pad->contents = p;
7210 }
7211
7212 memset (need_pad->contents + need_pad->size, 0, 8);
7213 need_pad->size += 8;
7214 }
7215
7216 return TRUE;
7217 }
7218
7219 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7220
7221 asection *
7222 ppc64_elf_tls_setup (bfd *obfd,
7223 struct bfd_link_info *info,
7224 int no_tls_get_addr_opt)
7225 {
7226 struct ppc_link_hash_table *htab;
7227
7228 htab = ppc_hash_table (info);
7229 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7230 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7231 FALSE, FALSE, TRUE));
7232 /* Move dynamic linking info to the function descriptor sym. */
7233 if (htab->tls_get_addr != NULL)
7234 func_desc_adjust (&htab->tls_get_addr->elf, info);
7235 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7236 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7237 FALSE, FALSE, TRUE));
7238 if (!no_tls_get_addr_opt)
7239 {
7240 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7241
7242 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7243 FALSE, FALSE, TRUE);
7244 if (opt != NULL)
7245 func_desc_adjust (opt, info);
7246 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7247 FALSE, FALSE, TRUE);
7248 if (opt_fd != NULL
7249 && (opt_fd->root.type == bfd_link_hash_defined
7250 || opt_fd->root.type == bfd_link_hash_defweak))
7251 {
7252 /* If glibc supports an optimized __tls_get_addr call stub,
7253 signalled by the presence of __tls_get_addr_opt, and we'll
7254 be calling __tls_get_addr via a plt call stub, then
7255 make __tls_get_addr point to __tls_get_addr_opt. */
7256 tga_fd = &htab->tls_get_addr_fd->elf;
7257 if (htab->elf.dynamic_sections_created
7258 && tga_fd != NULL
7259 && (tga_fd->type == STT_FUNC
7260 || tga_fd->needs_plt)
7261 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7262 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7263 && tga_fd->root.type == bfd_link_hash_undefweak)))
7264 {
7265 struct plt_entry *ent;
7266
7267 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7268 if (ent->plt.refcount > 0)
7269 break;
7270 if (ent != NULL)
7271 {
7272 tga_fd->root.type = bfd_link_hash_indirect;
7273 tga_fd->root.u.i.link = &opt_fd->root;
7274 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7275 if (opt_fd->dynindx != -1)
7276 {
7277 /* Use __tls_get_addr_opt in dynamic relocations. */
7278 opt_fd->dynindx = -1;
7279 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7280 opt_fd->dynstr_index);
7281 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7282 return FALSE;
7283 }
7284 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7285 tga = &htab->tls_get_addr->elf;
7286 if (opt != NULL && tga != NULL)
7287 {
7288 tga->root.type = bfd_link_hash_indirect;
7289 tga->root.u.i.link = &opt->root;
7290 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7291 _bfd_elf_link_hash_hide_symbol (info, opt,
7292 tga->forced_local);
7293 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7294 }
7295 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7296 htab->tls_get_addr_fd->is_func_descriptor = 1;
7297 if (htab->tls_get_addr != NULL)
7298 {
7299 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7300 htab->tls_get_addr->is_func = 1;
7301 }
7302 }
7303 }
7304 }
7305 else
7306 no_tls_get_addr_opt = TRUE;
7307 }
7308 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7309 return _bfd_elf_tls_setup (obfd, info);
7310 }
7311
7312 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7313 HASH1 or HASH2. */
7314
7315 static bfd_boolean
7316 branch_reloc_hash_match (const bfd *ibfd,
7317 const Elf_Internal_Rela *rel,
7318 const struct ppc_link_hash_entry *hash1,
7319 const struct ppc_link_hash_entry *hash2)
7320 {
7321 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7322 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7323 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7324
7325 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7326 {
7327 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7328 struct elf_link_hash_entry *h;
7329
7330 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7331 h = elf_follow_link (h);
7332 if (h == &hash1->elf || h == &hash2->elf)
7333 return TRUE;
7334 }
7335 return FALSE;
7336 }
7337
7338 /* Run through all the TLS relocs looking for optimization
7339 opportunities. The linker has been hacked (see ppc64elf.em) to do
7340 a preliminary section layout so that we know the TLS segment
7341 offsets. We can't optimize earlier because some optimizations need
7342 to know the tp offset, and we need to optimize before allocating
7343 dynamic relocations. */
7344
7345 bfd_boolean
7346 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7347 {
7348 bfd *ibfd;
7349 asection *sec;
7350 struct ppc_link_hash_table *htab;
7351 int pass;
7352
7353 if (info->relocatable || !info->executable)
7354 return TRUE;
7355
7356 htab = ppc_hash_table (info);
7357 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7358 {
7359 Elf_Internal_Sym *locsyms = NULL;
7360 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7361 unsigned char *toc_ref = NULL;
7362
7363 /* Look at all the sections for this file. Make two passes over
7364 the relocs. On the first pass, mark toc entries involved
7365 with tls relocs, and check that tls relocs involved in
7366 setting up a tls_get_addr call are indeed followed by such a
7367 call. If they are not, exclude them from the optimizations
7368 done on the second pass. */
7369 for (pass = 0; pass < 2; ++pass)
7370 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7371 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7372 {
7373 Elf_Internal_Rela *relstart, *rel, *relend;
7374
7375 /* Read the relocations. */
7376 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7377 info->keep_memory);
7378 if (relstart == NULL)
7379 return FALSE;
7380
7381 relend = relstart + sec->reloc_count;
7382 for (rel = relstart; rel < relend; rel++)
7383 {
7384 enum elf_ppc64_reloc_type r_type;
7385 unsigned long r_symndx;
7386 struct elf_link_hash_entry *h;
7387 Elf_Internal_Sym *sym;
7388 asection *sym_sec;
7389 char *tls_mask;
7390 char tls_set, tls_clear, tls_type = 0;
7391 bfd_vma value;
7392 bfd_boolean ok_tprel, is_local;
7393 long toc_ref_index = 0;
7394 int expecting_tls_get_addr = 0;
7395
7396 r_symndx = ELF64_R_SYM (rel->r_info);
7397 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7398 r_symndx, ibfd))
7399 {
7400 err_free_rel:
7401 if (elf_section_data (sec)->relocs != relstart)
7402 free (relstart);
7403 if (toc_ref != NULL)
7404 free (toc_ref);
7405 if (locsyms != NULL
7406 && (elf_symtab_hdr (ibfd).contents
7407 != (unsigned char *) locsyms))
7408 free (locsyms);
7409 return FALSE;
7410 }
7411
7412 if (h != NULL)
7413 {
7414 if (h->root.type == bfd_link_hash_defined
7415 || h->root.type == bfd_link_hash_defweak)
7416 value = h->root.u.def.value;
7417 else if (h->root.type == bfd_link_hash_undefweak)
7418 value = 0;
7419 else
7420 continue;
7421 }
7422 else
7423 /* Symbols referenced by TLS relocs must be of type
7424 STT_TLS. So no need for .opd local sym adjust. */
7425 value = sym->st_value;
7426
7427 ok_tprel = FALSE;
7428 is_local = FALSE;
7429 if (h == NULL
7430 || !h->def_dynamic)
7431 {
7432 is_local = TRUE;
7433 if (h != NULL
7434 && h->root.type == bfd_link_hash_undefweak)
7435 ok_tprel = TRUE;
7436 else
7437 {
7438 value += sym_sec->output_offset;
7439 value += sym_sec->output_section->vma;
7440 value -= htab->elf.tls_sec->vma;
7441 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7442 < (bfd_vma) 1 << 32);
7443 }
7444 }
7445
7446 r_type = ELF64_R_TYPE (rel->r_info);
7447 switch (r_type)
7448 {
7449 case R_PPC64_GOT_TLSLD16:
7450 case R_PPC64_GOT_TLSLD16_LO:
7451 expecting_tls_get_addr = 1;
7452 /* Fall thru */
7453
7454 case R_PPC64_GOT_TLSLD16_HI:
7455 case R_PPC64_GOT_TLSLD16_HA:
7456 /* These relocs should never be against a symbol
7457 defined in a shared lib. Leave them alone if
7458 that turns out to be the case. */
7459 if (!is_local)
7460 continue;
7461
7462 /* LD -> LE */
7463 tls_set = 0;
7464 tls_clear = TLS_LD;
7465 tls_type = TLS_TLS | TLS_LD;
7466 break;
7467
7468 case R_PPC64_GOT_TLSGD16:
7469 case R_PPC64_GOT_TLSGD16_LO:
7470 expecting_tls_get_addr = 1;
7471 /* Fall thru */
7472
7473 case R_PPC64_GOT_TLSGD16_HI:
7474 case R_PPC64_GOT_TLSGD16_HA:
7475 if (ok_tprel)
7476 /* GD -> LE */
7477 tls_set = 0;
7478 else
7479 /* GD -> IE */
7480 tls_set = TLS_TLS | TLS_TPRELGD;
7481 tls_clear = TLS_GD;
7482 tls_type = TLS_TLS | TLS_GD;
7483 break;
7484
7485 case R_PPC64_GOT_TPREL16_DS:
7486 case R_PPC64_GOT_TPREL16_LO_DS:
7487 case R_PPC64_GOT_TPREL16_HI:
7488 case R_PPC64_GOT_TPREL16_HA:
7489 if (ok_tprel)
7490 {
7491 /* IE -> LE */
7492 tls_set = 0;
7493 tls_clear = TLS_TPREL;
7494 tls_type = TLS_TLS | TLS_TPREL;
7495 break;
7496 }
7497 continue;
7498
7499 case R_PPC64_TOC16:
7500 case R_PPC64_TOC16_LO:
7501 case R_PPC64_TLS:
7502 case R_PPC64_TLSGD:
7503 case R_PPC64_TLSLD:
7504 if (sym_sec == NULL || sym_sec != toc)
7505 continue;
7506
7507 /* Mark this toc entry as referenced by a TLS
7508 code sequence. We can do that now in the
7509 case of R_PPC64_TLS, and after checking for
7510 tls_get_addr for the TOC16 relocs. */
7511 if (toc_ref == NULL)
7512 {
7513 toc_ref = bfd_zmalloc (toc->size / 8);
7514 if (toc_ref == NULL)
7515 goto err_free_rel;
7516 }
7517 if (h != NULL)
7518 value = h->root.u.def.value;
7519 else
7520 value = sym->st_value;
7521 value += rel->r_addend;
7522 BFD_ASSERT (value < toc->size && value % 8 == 0);
7523 toc_ref_index = value / 8;
7524 if (r_type == R_PPC64_TLS
7525 || r_type == R_PPC64_TLSGD
7526 || r_type == R_PPC64_TLSLD)
7527 {
7528 toc_ref[toc_ref_index] = 1;
7529 continue;
7530 }
7531
7532 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7533 continue;
7534
7535 tls_set = 0;
7536 tls_clear = 0;
7537 expecting_tls_get_addr = 2;
7538 break;
7539
7540 case R_PPC64_TPREL64:
7541 if (pass == 0
7542 || sec != toc
7543 || toc_ref == NULL
7544 || !toc_ref[rel->r_offset / 8])
7545 continue;
7546 if (ok_tprel)
7547 {
7548 /* IE -> LE */
7549 tls_set = TLS_EXPLICIT;
7550 tls_clear = TLS_TPREL;
7551 break;
7552 }
7553 continue;
7554
7555 case R_PPC64_DTPMOD64:
7556 if (pass == 0
7557 || sec != toc
7558 || toc_ref == NULL
7559 || !toc_ref[rel->r_offset / 8])
7560 continue;
7561 if (rel + 1 < relend
7562 && (rel[1].r_info
7563 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7564 && rel[1].r_offset == rel->r_offset + 8)
7565 {
7566 if (ok_tprel)
7567 /* GD -> LE */
7568 tls_set = TLS_EXPLICIT | TLS_GD;
7569 else
7570 /* GD -> IE */
7571 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7572 tls_clear = TLS_GD;
7573 }
7574 else
7575 {
7576 if (!is_local)
7577 continue;
7578
7579 /* LD -> LE */
7580 tls_set = TLS_EXPLICIT;
7581 tls_clear = TLS_LD;
7582 }
7583 break;
7584
7585 default:
7586 continue;
7587 }
7588
7589 if (pass == 0)
7590 {
7591 if (!expecting_tls_get_addr
7592 || !sec->has_tls_get_addr_call)
7593 continue;
7594
7595 if (rel + 1 < relend
7596 && branch_reloc_hash_match (ibfd, rel + 1,
7597 htab->tls_get_addr,
7598 htab->tls_get_addr_fd))
7599 {
7600 if (expecting_tls_get_addr == 2)
7601 {
7602 /* Check for toc tls entries. */
7603 char *toc_tls;
7604 int retval;
7605
7606 retval = get_tls_mask (&toc_tls, NULL, NULL,
7607 &locsyms,
7608 rel, ibfd);
7609 if (retval == 0)
7610 goto err_free_rel;
7611 if (retval > 1 && toc_tls != NULL)
7612 toc_ref[toc_ref_index] = 1;
7613 }
7614 continue;
7615 }
7616
7617 if (expecting_tls_get_addr != 1)
7618 continue;
7619
7620 /* Uh oh, we didn't find the expected call. We
7621 could just mark this symbol to exclude it
7622 from tls optimization but it's safer to skip
7623 the entire section. */
7624 sec->has_tls_reloc = 0;
7625 break;
7626 }
7627
7628 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7629 {
7630 struct plt_entry *ent;
7631 for (ent = htab->tls_get_addr->elf.plt.plist;
7632 ent != NULL;
7633 ent = ent->next)
7634 if (ent->addend == 0)
7635 {
7636 if (ent->plt.refcount > 0)
7637 {
7638 ent->plt.refcount -= 1;
7639 expecting_tls_get_addr = 0;
7640 }
7641 break;
7642 }
7643 }
7644
7645 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7646 {
7647 struct plt_entry *ent;
7648 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7649 ent != NULL;
7650 ent = ent->next)
7651 if (ent->addend == 0)
7652 {
7653 if (ent->plt.refcount > 0)
7654 ent->plt.refcount -= 1;
7655 break;
7656 }
7657 }
7658
7659 if (tls_clear == 0)
7660 continue;
7661
7662 if ((tls_set & TLS_EXPLICIT) == 0)
7663 {
7664 struct got_entry *ent;
7665
7666 /* Adjust got entry for this reloc. */
7667 if (h != NULL)
7668 ent = h->got.glist;
7669 else
7670 ent = elf_local_got_ents (ibfd)[r_symndx];
7671
7672 for (; ent != NULL; ent = ent->next)
7673 if (ent->addend == rel->r_addend
7674 && ent->owner == ibfd
7675 && ent->tls_type == tls_type)
7676 break;
7677 if (ent == NULL)
7678 abort ();
7679
7680 if (tls_set == 0)
7681 {
7682 /* We managed to get rid of a got entry. */
7683 if (ent->got.refcount > 0)
7684 ent->got.refcount -= 1;
7685 }
7686 }
7687 else
7688 {
7689 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7690 we'll lose one or two dyn relocs. */
7691 if (!dec_dynrel_count (rel->r_info, sec, info,
7692 NULL, h, sym_sec))
7693 return FALSE;
7694
7695 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7696 {
7697 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7698 NULL, h, sym_sec))
7699 return FALSE;
7700 }
7701 }
7702
7703 *tls_mask |= tls_set;
7704 *tls_mask &= ~tls_clear;
7705 }
7706
7707 if (elf_section_data (sec)->relocs != relstart)
7708 free (relstart);
7709 }
7710
7711 if (toc_ref != NULL)
7712 free (toc_ref);
7713
7714 if (locsyms != NULL
7715 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7716 {
7717 if (!info->keep_memory)
7718 free (locsyms);
7719 else
7720 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7721 }
7722 }
7723 return TRUE;
7724 }
7725
7726 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7727 the values of any global symbols in a toc section that has been
7728 edited. Globals in toc sections should be a rarity, so this function
7729 sets a flag if any are found in toc sections other than the one just
7730 edited, so that futher hash table traversals can be avoided. */
7731
7732 struct adjust_toc_info
7733 {
7734 asection *toc;
7735 unsigned long *skip;
7736 bfd_boolean global_toc_syms;
7737 };
7738
7739 static bfd_boolean
7740 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7741 {
7742 struct ppc_link_hash_entry *eh;
7743 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7744
7745 if (h->root.type == bfd_link_hash_indirect)
7746 return TRUE;
7747
7748 if (h->root.type == bfd_link_hash_warning)
7749 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7750
7751 if (h->root.type != bfd_link_hash_defined
7752 && h->root.type != bfd_link_hash_defweak)
7753 return TRUE;
7754
7755 eh = (struct ppc_link_hash_entry *) h;
7756 if (eh->adjust_done)
7757 return TRUE;
7758
7759 if (eh->elf.root.u.def.section == toc_inf->toc)
7760 {
7761 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7762 if (skip != (unsigned long) -1)
7763 eh->elf.root.u.def.value -= skip;
7764 else
7765 {
7766 (*_bfd_error_handler)
7767 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7768 eh->elf.root.u.def.section = &bfd_abs_section;
7769 eh->elf.root.u.def.value = 0;
7770 }
7771 eh->adjust_done = 1;
7772 }
7773 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7774 toc_inf->global_toc_syms = TRUE;
7775
7776 return TRUE;
7777 }
7778
7779 /* Examine all relocs referencing .toc sections in order to remove
7780 unused .toc entries. */
7781
7782 bfd_boolean
7783 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7784 {
7785 bfd *ibfd;
7786 struct adjust_toc_info toc_inf;
7787
7788 toc_inf.global_toc_syms = TRUE;
7789 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7790 {
7791 asection *toc, *sec;
7792 Elf_Internal_Shdr *symtab_hdr;
7793 Elf_Internal_Sym *local_syms;
7794 struct elf_link_hash_entry **sym_hashes;
7795 Elf_Internal_Rela *relstart, *rel;
7796 unsigned long *skip, *drop;
7797 unsigned char *used;
7798 unsigned char *keep, last, some_unused;
7799
7800 toc = bfd_get_section_by_name (ibfd, ".toc");
7801 if (toc == NULL
7802 || toc->size == 0
7803 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7804 || elf_discarded_section (toc))
7805 continue;
7806
7807 local_syms = NULL;
7808 symtab_hdr = &elf_symtab_hdr (ibfd);
7809 sym_hashes = elf_sym_hashes (ibfd);
7810
7811 /* Look at sections dropped from the final link. */
7812 skip = NULL;
7813 relstart = NULL;
7814 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7815 {
7816 if (sec->reloc_count == 0
7817 || !elf_discarded_section (sec)
7818 || get_opd_info (sec)
7819 || (sec->flags & SEC_ALLOC) == 0
7820 || (sec->flags & SEC_DEBUGGING) != 0)
7821 continue;
7822
7823 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7824 if (relstart == NULL)
7825 goto error_ret;
7826
7827 /* Run through the relocs to see which toc entries might be
7828 unused. */
7829 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7830 {
7831 enum elf_ppc64_reloc_type r_type;
7832 unsigned long r_symndx;
7833 asection *sym_sec;
7834 struct elf_link_hash_entry *h;
7835 Elf_Internal_Sym *sym;
7836 bfd_vma val;
7837
7838 r_type = ELF64_R_TYPE (rel->r_info);
7839 switch (r_type)
7840 {
7841 default:
7842 continue;
7843
7844 case R_PPC64_TOC16:
7845 case R_PPC64_TOC16_LO:
7846 case R_PPC64_TOC16_HI:
7847 case R_PPC64_TOC16_HA:
7848 case R_PPC64_TOC16_DS:
7849 case R_PPC64_TOC16_LO_DS:
7850 break;
7851 }
7852
7853 r_symndx = ELF64_R_SYM (rel->r_info);
7854 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7855 r_symndx, ibfd))
7856 goto error_ret;
7857
7858 if (sym_sec != toc)
7859 continue;
7860
7861 if (h != NULL)
7862 val = h->root.u.def.value;
7863 else
7864 val = sym->st_value;
7865 val += rel->r_addend;
7866
7867 if (val >= toc->size)
7868 continue;
7869
7870 /* Anything in the toc ought to be aligned to 8 bytes.
7871 If not, don't mark as unused. */
7872 if (val & 7)
7873 continue;
7874
7875 if (skip == NULL)
7876 {
7877 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7878 if (skip == NULL)
7879 goto error_ret;
7880 }
7881
7882 skip[val >> 3] = 1;
7883 }
7884
7885 if (elf_section_data (sec)->relocs != relstart)
7886 free (relstart);
7887 }
7888
7889 if (skip == NULL)
7890 continue;
7891
7892 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7893 if (used == NULL)
7894 {
7895 error_ret:
7896 if (local_syms != NULL
7897 && symtab_hdr->contents != (unsigned char *) local_syms)
7898 free (local_syms);
7899 if (sec != NULL
7900 && relstart != NULL
7901 && elf_section_data (sec)->relocs != relstart)
7902 free (relstart);
7903 if (skip != NULL)
7904 free (skip);
7905 return FALSE;
7906 }
7907
7908 /* Now check all kept sections that might reference the toc.
7909 Check the toc itself last. */
7910 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7911 : ibfd->sections);
7912 sec != NULL;
7913 sec = (sec == toc ? NULL
7914 : sec->next == NULL ? toc
7915 : sec->next == toc && toc->next ? toc->next
7916 : sec->next))
7917 {
7918 int repeat;
7919
7920 if (sec->reloc_count == 0
7921 || elf_discarded_section (sec)
7922 || get_opd_info (sec)
7923 || (sec->flags & SEC_ALLOC) == 0
7924 || (sec->flags & SEC_DEBUGGING) != 0)
7925 continue;
7926
7927 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7928 if (relstart == NULL)
7929 goto error_ret;
7930
7931 /* Mark toc entries referenced as used. */
7932 repeat = 0;
7933 do
7934 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7935 {
7936 enum elf_ppc64_reloc_type r_type;
7937 unsigned long r_symndx;
7938 asection *sym_sec;
7939 struct elf_link_hash_entry *h;
7940 Elf_Internal_Sym *sym;
7941 bfd_vma val;
7942
7943 r_type = ELF64_R_TYPE (rel->r_info);
7944 switch (r_type)
7945 {
7946 case R_PPC64_TOC16:
7947 case R_PPC64_TOC16_LO:
7948 case R_PPC64_TOC16_HI:
7949 case R_PPC64_TOC16_HA:
7950 case R_PPC64_TOC16_DS:
7951 case R_PPC64_TOC16_LO_DS:
7952 /* In case we're taking addresses of toc entries. */
7953 case R_PPC64_ADDR64:
7954 break;
7955
7956 default:
7957 continue;
7958 }
7959
7960 r_symndx = ELF64_R_SYM (rel->r_info);
7961 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7962 r_symndx, ibfd))
7963 {
7964 free (used);
7965 goto error_ret;
7966 }
7967
7968 if (sym_sec != toc)
7969 continue;
7970
7971 if (h != NULL)
7972 val = h->root.u.def.value;
7973 else
7974 val = sym->st_value;
7975 val += rel->r_addend;
7976
7977 if (val >= toc->size)
7978 continue;
7979
7980 /* For the toc section, we only mark as used if
7981 this entry itself isn't unused. */
7982 if (sec == toc
7983 && !used[val >> 3]
7984 && (used[rel->r_offset >> 3]
7985 || !skip[rel->r_offset >> 3]))
7986 /* Do all the relocs again, to catch reference
7987 chains. */
7988 repeat = 1;
7989
7990 used[val >> 3] = 1;
7991 }
7992 while (repeat);
7993 }
7994
7995 /* Merge the used and skip arrays. Assume that TOC
7996 doublewords not appearing as either used or unused belong
7997 to to an entry more than one doubleword in size. */
7998 for (drop = skip, keep = used, last = 0, some_unused = 0;
7999 drop < skip + (toc->size + 7) / 8;
8000 ++drop, ++keep)
8001 {
8002 if (*keep)
8003 {
8004 *drop = 0;
8005 last = 0;
8006 }
8007 else if (*drop)
8008 {
8009 some_unused = 1;
8010 last = 1;
8011 }
8012 else
8013 *drop = last;
8014 }
8015
8016 free (used);
8017
8018 if (some_unused)
8019 {
8020 bfd_byte *contents, *src;
8021 unsigned long off;
8022
8023 /* Shuffle the toc contents, and at the same time convert the
8024 skip array from booleans into offsets. */
8025 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8026 goto error_ret;
8027
8028 elf_section_data (toc)->this_hdr.contents = contents;
8029
8030 for (src = contents, off = 0, drop = skip;
8031 src < contents + toc->size;
8032 src += 8, ++drop)
8033 {
8034 if (*drop)
8035 {
8036 *drop = (unsigned long) -1;
8037 off += 8;
8038 }
8039 else if (off != 0)
8040 {
8041 *drop = off;
8042 memcpy (src - off, src, 8);
8043 }
8044 }
8045 toc->rawsize = toc->size;
8046 toc->size = src - contents - off;
8047
8048 if (toc->reloc_count != 0)
8049 {
8050 Elf_Internal_Rela *wrel;
8051 bfd_size_type sz;
8052
8053 /* Read toc relocs. */
8054 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8055 TRUE);
8056 if (relstart == NULL)
8057 goto error_ret;
8058
8059 /* Remove unused toc relocs, and adjust those we keep. */
8060 wrel = relstart;
8061 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8062 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8063 {
8064 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8065 wrel->r_info = rel->r_info;
8066 wrel->r_addend = rel->r_addend;
8067 ++wrel;
8068 }
8069 else if (!dec_dynrel_count (rel->r_info, toc, info,
8070 &local_syms, NULL, NULL))
8071 goto error_ret;
8072
8073 toc->reloc_count = wrel - relstart;
8074 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8075 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8076 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8077 }
8078
8079 /* Adjust addends for relocs against the toc section sym. */
8080 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8081 {
8082 if (sec->reloc_count == 0
8083 || elf_discarded_section (sec))
8084 continue;
8085
8086 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8087 TRUE);
8088 if (relstart == NULL)
8089 goto error_ret;
8090
8091 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8092 {
8093 enum elf_ppc64_reloc_type r_type;
8094 unsigned long r_symndx;
8095 asection *sym_sec;
8096 struct elf_link_hash_entry *h;
8097 Elf_Internal_Sym *sym;
8098
8099 r_type = ELF64_R_TYPE (rel->r_info);
8100 switch (r_type)
8101 {
8102 default:
8103 continue;
8104
8105 case R_PPC64_TOC16:
8106 case R_PPC64_TOC16_LO:
8107 case R_PPC64_TOC16_HI:
8108 case R_PPC64_TOC16_HA:
8109 case R_PPC64_TOC16_DS:
8110 case R_PPC64_TOC16_LO_DS:
8111 case R_PPC64_ADDR64:
8112 break;
8113 }
8114
8115 r_symndx = ELF64_R_SYM (rel->r_info);
8116 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8117 r_symndx, ibfd))
8118 goto error_ret;
8119
8120 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8121 continue;
8122
8123 rel->r_addend -= skip[rel->r_addend >> 3];
8124 }
8125 }
8126
8127 /* We shouldn't have local or global symbols defined in the TOC,
8128 but handle them anyway. */
8129 if (local_syms != NULL)
8130 {
8131 Elf_Internal_Sym *sym;
8132
8133 for (sym = local_syms;
8134 sym < local_syms + symtab_hdr->sh_info;
8135 ++sym)
8136 if (sym->st_value != 0
8137 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8138 {
8139 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8140 sym->st_value -= skip[sym->st_value >> 3];
8141 else
8142 {
8143 (*_bfd_error_handler)
8144 (_("%s defined in removed toc entry"),
8145 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8146 NULL));
8147 sym->st_value = 0;
8148 sym->st_shndx = SHN_ABS;
8149 }
8150 symtab_hdr->contents = (unsigned char *) local_syms;
8151 }
8152 }
8153
8154 /* Finally, adjust any global syms defined in the toc. */
8155 if (toc_inf.global_toc_syms)
8156 {
8157 toc_inf.toc = toc;
8158 toc_inf.skip = skip;
8159 toc_inf.global_toc_syms = FALSE;
8160 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8161 &toc_inf);
8162 }
8163 }
8164
8165 if (local_syms != NULL
8166 && symtab_hdr->contents != (unsigned char *) local_syms)
8167 {
8168 if (!info->keep_memory)
8169 free (local_syms);
8170 else
8171 symtab_hdr->contents = (unsigned char *) local_syms;
8172 }
8173 free (skip);
8174 }
8175
8176 return TRUE;
8177 }
8178
8179 /* Allocate space in .plt, .got and associated reloc sections for
8180 dynamic relocs. */
8181
8182 static bfd_boolean
8183 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8184 {
8185 struct bfd_link_info *info;
8186 struct ppc_link_hash_table *htab;
8187 asection *s;
8188 struct ppc_link_hash_entry *eh;
8189 struct ppc_dyn_relocs *p;
8190 struct got_entry *gent;
8191
8192 if (h->root.type == bfd_link_hash_indirect)
8193 return TRUE;
8194
8195 if (h->root.type == bfd_link_hash_warning)
8196 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8197
8198 info = (struct bfd_link_info *) inf;
8199 htab = ppc_hash_table (info);
8200
8201 if ((htab->elf.dynamic_sections_created
8202 && h->dynindx != -1
8203 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8204 || h->type == STT_GNU_IFUNC)
8205 {
8206 struct plt_entry *pent;
8207 bfd_boolean doneone = FALSE;
8208 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8209 if (pent->plt.refcount > 0)
8210 {
8211 if (!htab->elf.dynamic_sections_created
8212 || h->dynindx == -1)
8213 {
8214 s = htab->iplt;
8215 pent->plt.offset = s->size;
8216 s->size += PLT_ENTRY_SIZE;
8217 s = htab->reliplt;
8218 }
8219 else
8220 {
8221 /* If this is the first .plt entry, make room for the special
8222 first entry. */
8223 s = htab->plt;
8224 if (s->size == 0)
8225 s->size += PLT_INITIAL_ENTRY_SIZE;
8226
8227 pent->plt.offset = s->size;
8228
8229 /* Make room for this entry. */
8230 s->size += PLT_ENTRY_SIZE;
8231
8232 /* Make room for the .glink code. */
8233 s = htab->glink;
8234 if (s->size == 0)
8235 s->size += GLINK_CALL_STUB_SIZE;
8236 /* We need bigger stubs past index 32767. */
8237 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8238 s->size += 4;
8239 s->size += 2*4;
8240
8241 /* We also need to make an entry in the .rela.plt section. */
8242 s = htab->relplt;
8243 }
8244 s->size += sizeof (Elf64_External_Rela);
8245 doneone = TRUE;
8246 }
8247 else
8248 pent->plt.offset = (bfd_vma) -1;
8249 if (!doneone)
8250 {
8251 h->plt.plist = NULL;
8252 h->needs_plt = 0;
8253 }
8254 }
8255 else
8256 {
8257 h->plt.plist = NULL;
8258 h->needs_plt = 0;
8259 }
8260
8261 eh = (struct ppc_link_hash_entry *) h;
8262 /* Run through the TLS GD got entries first if we're changing them
8263 to TPREL. */
8264 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8265 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8266 if (gent->got.refcount > 0
8267 && (gent->tls_type & TLS_GD) != 0)
8268 {
8269 /* This was a GD entry that has been converted to TPREL. If
8270 there happens to be a TPREL entry we can use that one. */
8271 struct got_entry *ent;
8272 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8273 if (ent->got.refcount > 0
8274 && (ent->tls_type & TLS_TPREL) != 0
8275 && ent->addend == gent->addend
8276 && ent->owner == gent->owner)
8277 {
8278 gent->got.refcount = 0;
8279 break;
8280 }
8281
8282 /* If not, then we'll be using our own TPREL entry. */
8283 if (gent->got.refcount != 0)
8284 gent->tls_type = TLS_TLS | TLS_TPREL;
8285 }
8286
8287 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8288 if (gent->got.refcount > 0)
8289 {
8290 bfd_boolean dyn;
8291 asection *rsec;
8292
8293 /* Make sure this symbol is output as a dynamic symbol.
8294 Undefined weak syms won't yet be marked as dynamic,
8295 nor will all TLS symbols. */
8296 if (h->dynindx == -1
8297 && !h->forced_local
8298 && h->type != STT_GNU_IFUNC
8299 && htab->elf.dynamic_sections_created)
8300 {
8301 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8302 return FALSE;
8303 }
8304
8305 if ((gent->tls_type & TLS_LD) != 0
8306 && !h->def_dynamic)
8307 {
8308 ppc64_tlsld_got (gent->owner)->refcount += 1;
8309 gent->got.offset = (bfd_vma) -1;
8310 continue;
8311 }
8312
8313 if (!is_ppc64_elf (gent->owner))
8314 continue;
8315
8316 s = ppc64_elf_tdata (gent->owner)->got;
8317 gent->got.offset = s->size;
8318 s->size
8319 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
8320 dyn = htab->elf.dynamic_sections_created;
8321 rsec = NULL;
8322 if ((info->shared
8323 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8324 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8325 || h->root.type != bfd_link_hash_undefweak))
8326 rsec = ppc64_elf_tdata (gent->owner)->relgot;
8327 else if (h->type == STT_GNU_IFUNC)
8328 rsec = htab->reliplt;
8329 if (rsec != NULL)
8330 rsec->size += (gent->tls_type & eh->tls_mask & TLS_GD
8331 ? 2 * sizeof (Elf64_External_Rela)
8332 : sizeof (Elf64_External_Rela));
8333 }
8334 else
8335 gent->got.offset = (bfd_vma) -1;
8336
8337 if (eh->dyn_relocs == NULL
8338 || (!htab->elf.dynamic_sections_created
8339 && h->type != STT_GNU_IFUNC))
8340 return TRUE;
8341
8342 /* In the shared -Bsymbolic case, discard space allocated for
8343 dynamic pc-relative relocs against symbols which turn out to be
8344 defined in regular objects. For the normal shared case, discard
8345 space for relocs that have become local due to symbol visibility
8346 changes. */
8347
8348 if (info->shared)
8349 {
8350 /* Relocs that use pc_count are those that appear on a call insn,
8351 or certain REL relocs (see must_be_dyn_reloc) that can be
8352 generated via assembly. We want calls to protected symbols to
8353 resolve directly to the function rather than going via the plt.
8354 If people want function pointer comparisons to work as expected
8355 then they should avoid writing weird assembly. */
8356 if (SYMBOL_CALLS_LOCAL (info, h))
8357 {
8358 struct ppc_dyn_relocs **pp;
8359
8360 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8361 {
8362 p->count -= p->pc_count;
8363 p->pc_count = 0;
8364 if (p->count == 0)
8365 *pp = p->next;
8366 else
8367 pp = &p->next;
8368 }
8369 }
8370
8371 /* Also discard relocs on undefined weak syms with non-default
8372 visibility. */
8373 if (eh->dyn_relocs != NULL
8374 && h->root.type == bfd_link_hash_undefweak)
8375 {
8376 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8377 eh->dyn_relocs = NULL;
8378
8379 /* Make sure this symbol is output as a dynamic symbol.
8380 Undefined weak syms won't yet be marked as dynamic. */
8381 else if (h->dynindx == -1
8382 && !h->forced_local)
8383 {
8384 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8385 return FALSE;
8386 }
8387 }
8388 }
8389 else if (h->type == STT_GNU_IFUNC)
8390 {
8391 if (!h->non_got_ref)
8392 eh->dyn_relocs = NULL;
8393 }
8394 else if (ELIMINATE_COPY_RELOCS)
8395 {
8396 /* For the non-shared case, discard space for relocs against
8397 symbols which turn out to need copy relocs or are not
8398 dynamic. */
8399
8400 if (!h->non_got_ref
8401 && !h->def_regular)
8402 {
8403 /* Make sure this symbol is output as a dynamic symbol.
8404 Undefined weak syms won't yet be marked as dynamic. */
8405 if (h->dynindx == -1
8406 && !h->forced_local)
8407 {
8408 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8409 return FALSE;
8410 }
8411
8412 /* If that succeeded, we know we'll be keeping all the
8413 relocs. */
8414 if (h->dynindx != -1)
8415 goto keep;
8416 }
8417
8418 eh->dyn_relocs = NULL;
8419
8420 keep: ;
8421 }
8422
8423 /* Finally, allocate space. */
8424 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8425 {
8426 asection *sreloc = elf_section_data (p->sec)->sreloc;
8427 if (!htab->elf.dynamic_sections_created)
8428 sreloc = htab->reliplt;
8429 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8430 }
8431
8432 return TRUE;
8433 }
8434
8435 /* Find any dynamic relocs that apply to read-only sections. */
8436
8437 static bfd_boolean
8438 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8439 {
8440 struct ppc_link_hash_entry *eh;
8441 struct ppc_dyn_relocs *p;
8442
8443 if (h->root.type == bfd_link_hash_warning)
8444 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8445
8446 eh = (struct ppc_link_hash_entry *) h;
8447 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8448 {
8449 asection *s = p->sec->output_section;
8450
8451 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8452 {
8453 struct bfd_link_info *info = inf;
8454
8455 info->flags |= DF_TEXTREL;
8456
8457 /* Not an error, just cut short the traversal. */
8458 return FALSE;
8459 }
8460 }
8461 return TRUE;
8462 }
8463
8464 /* Set the sizes of the dynamic sections. */
8465
8466 static bfd_boolean
8467 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8468 struct bfd_link_info *info)
8469 {
8470 struct ppc_link_hash_table *htab;
8471 bfd *dynobj;
8472 asection *s;
8473 bfd_boolean relocs;
8474 bfd *ibfd;
8475
8476 htab = ppc_hash_table (info);
8477 dynobj = htab->elf.dynobj;
8478 if (dynobj == NULL)
8479 abort ();
8480
8481 if (htab->elf.dynamic_sections_created)
8482 {
8483 /* Set the contents of the .interp section to the interpreter. */
8484 if (info->executable)
8485 {
8486 s = bfd_get_section_by_name (dynobj, ".interp");
8487 if (s == NULL)
8488 abort ();
8489 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8490 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8491 }
8492 }
8493
8494 /* Set up .got offsets for local syms, and space for local dynamic
8495 relocs. */
8496 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8497 {
8498 struct got_entry **lgot_ents;
8499 struct got_entry **end_lgot_ents;
8500 struct plt_entry **local_plt;
8501 struct plt_entry **end_local_plt;
8502 char *lgot_masks;
8503 bfd_size_type locsymcount;
8504 Elf_Internal_Shdr *symtab_hdr;
8505 asection *srel;
8506
8507 if (!is_ppc64_elf (ibfd))
8508 continue;
8509
8510 for (s = ibfd->sections; s != NULL; s = s->next)
8511 {
8512 struct ppc_dyn_relocs *p;
8513
8514 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8515 {
8516 if (!bfd_is_abs_section (p->sec)
8517 && bfd_is_abs_section (p->sec->output_section))
8518 {
8519 /* Input section has been discarded, either because
8520 it is a copy of a linkonce section or due to
8521 linker script /DISCARD/, so we'll be discarding
8522 the relocs too. */
8523 }
8524 else if (p->count != 0)
8525 {
8526 srel = elf_section_data (p->sec)->sreloc;
8527 if (!htab->elf.dynamic_sections_created)
8528 srel = htab->reliplt;
8529 srel->size += p->count * sizeof (Elf64_External_Rela);
8530 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8531 info->flags |= DF_TEXTREL;
8532 }
8533 }
8534 }
8535
8536 lgot_ents = elf_local_got_ents (ibfd);
8537 if (!lgot_ents)
8538 continue;
8539
8540 symtab_hdr = &elf_symtab_hdr (ibfd);
8541 locsymcount = symtab_hdr->sh_info;
8542 end_lgot_ents = lgot_ents + locsymcount;
8543 local_plt = (struct plt_entry **) end_lgot_ents;
8544 end_local_plt = local_plt + locsymcount;
8545 lgot_masks = (char *) end_local_plt;
8546 s = ppc64_elf_tdata (ibfd)->got;
8547 srel = ppc64_elf_tdata (ibfd)->relgot;
8548 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8549 {
8550 struct got_entry *ent;
8551
8552 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8553 if (ent->got.refcount > 0)
8554 {
8555 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8556 {
8557 ppc64_tlsld_got (ibfd)->refcount += 1;
8558 ent->got.offset = (bfd_vma) -1;
8559 }
8560 else
8561 {
8562 unsigned int num = 1;
8563 ent->got.offset = s->size;
8564 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8565 num = 2;
8566 s->size += num * 8;
8567 if (info->shared)
8568 srel->size += num * sizeof (Elf64_External_Rela);
8569 else if ((*lgot_masks & PLT_IFUNC) != 0)
8570 htab->reliplt->size += num * sizeof (Elf64_External_Rela);
8571 }
8572 }
8573 else
8574 ent->got.offset = (bfd_vma) -1;
8575 }
8576
8577 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8578 for (; local_plt < end_local_plt; ++local_plt)
8579 {
8580 struct plt_entry *ent;
8581
8582 for (ent = *local_plt; ent != NULL; ent = ent->next)
8583 if (ent->plt.refcount > 0)
8584 {
8585 s = htab->iplt;
8586 ent->plt.offset = s->size;
8587 s->size += PLT_ENTRY_SIZE;
8588
8589 htab->reliplt->size += sizeof (Elf64_External_Rela);
8590 }
8591 else
8592 ent->plt.offset = (bfd_vma) -1;
8593 }
8594 }
8595
8596 /* Allocate global sym .plt and .got entries, and space for global
8597 sym dynamic relocs. */
8598 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8599
8600 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8601 {
8602 if (!is_ppc64_elf (ibfd))
8603 continue;
8604
8605 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8606 {
8607 s = ppc64_elf_tdata (ibfd)->got;
8608 ppc64_tlsld_got (ibfd)->offset = s->size;
8609 s->size += 16;
8610 if (info->shared)
8611 {
8612 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8613 srel->size += sizeof (Elf64_External_Rela);
8614 }
8615 }
8616 else
8617 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8618 }
8619
8620 /* We now have determined the sizes of the various dynamic sections.
8621 Allocate memory for them. */
8622 relocs = FALSE;
8623 for (s = dynobj->sections; s != NULL; s = s->next)
8624 {
8625 if ((s->flags & SEC_LINKER_CREATED) == 0)
8626 continue;
8627
8628 if (s == htab->brlt || s == htab->relbrlt)
8629 /* These haven't been allocated yet; don't strip. */
8630 continue;
8631 else if (s == htab->got
8632 || s == htab->plt
8633 || s == htab->iplt
8634 || s == htab->glink
8635 || s == htab->dynbss)
8636 {
8637 /* Strip this section if we don't need it; see the
8638 comment below. */
8639 }
8640 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8641 {
8642 if (s->size != 0)
8643 {
8644 if (s != htab->relplt)
8645 relocs = TRUE;
8646
8647 /* We use the reloc_count field as a counter if we need
8648 to copy relocs into the output file. */
8649 s->reloc_count = 0;
8650 }
8651 }
8652 else
8653 {
8654 /* It's not one of our sections, so don't allocate space. */
8655 continue;
8656 }
8657
8658 if (s->size == 0)
8659 {
8660 /* If we don't need this section, strip it from the
8661 output file. This is mostly to handle .rela.bss and
8662 .rela.plt. We must create both sections in
8663 create_dynamic_sections, because they must be created
8664 before the linker maps input sections to output
8665 sections. The linker does that before
8666 adjust_dynamic_symbol is called, and it is that
8667 function which decides whether anything needs to go
8668 into these sections. */
8669 s->flags |= SEC_EXCLUDE;
8670 continue;
8671 }
8672
8673 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8674 continue;
8675
8676 /* Allocate memory for the section contents. We use bfd_zalloc
8677 here in case unused entries are not reclaimed before the
8678 section's contents are written out. This should not happen,
8679 but this way if it does we get a R_PPC64_NONE reloc in .rela
8680 sections instead of garbage.
8681 We also rely on the section contents being zero when writing
8682 the GOT. */
8683 s->contents = bfd_zalloc (dynobj, s->size);
8684 if (s->contents == NULL)
8685 return FALSE;
8686 }
8687
8688 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8689 {
8690 if (!is_ppc64_elf (ibfd))
8691 continue;
8692
8693 s = ppc64_elf_tdata (ibfd)->got;
8694 if (s != NULL && s != htab->got)
8695 {
8696 if (s->size == 0)
8697 s->flags |= SEC_EXCLUDE;
8698 else
8699 {
8700 s->contents = bfd_zalloc (ibfd, s->size);
8701 if (s->contents == NULL)
8702 return FALSE;
8703 }
8704 }
8705 s = ppc64_elf_tdata (ibfd)->relgot;
8706 if (s != NULL)
8707 {
8708 if (s->size == 0)
8709 s->flags |= SEC_EXCLUDE;
8710 else
8711 {
8712 s->contents = bfd_zalloc (ibfd, s->size);
8713 if (s->contents == NULL)
8714 return FALSE;
8715 relocs = TRUE;
8716 s->reloc_count = 0;
8717 }
8718 }
8719 }
8720
8721 if (htab->elf.dynamic_sections_created)
8722 {
8723 /* Add some entries to the .dynamic section. We fill in the
8724 values later, in ppc64_elf_finish_dynamic_sections, but we
8725 must add the entries now so that we get the correct size for
8726 the .dynamic section. The DT_DEBUG entry is filled in by the
8727 dynamic linker and used by the debugger. */
8728 #define add_dynamic_entry(TAG, VAL) \
8729 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8730
8731 if (info->executable)
8732 {
8733 if (!add_dynamic_entry (DT_DEBUG, 0))
8734 return FALSE;
8735 }
8736
8737 if (htab->plt != NULL && htab->plt->size != 0)
8738 {
8739 if (!add_dynamic_entry (DT_PLTGOT, 0)
8740 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8741 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8742 || !add_dynamic_entry (DT_JMPREL, 0)
8743 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8744 return FALSE;
8745 }
8746
8747 if (NO_OPD_RELOCS)
8748 {
8749 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8750 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8751 return FALSE;
8752 }
8753
8754 if (!htab->no_tls_get_addr_opt
8755 && htab->tls_get_addr_fd != NULL
8756 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8757 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8758 return FALSE;
8759
8760 if (relocs)
8761 {
8762 if (!add_dynamic_entry (DT_RELA, 0)
8763 || !add_dynamic_entry (DT_RELASZ, 0)
8764 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8765 return FALSE;
8766
8767 /* If any dynamic relocs apply to a read-only section,
8768 then we need a DT_TEXTREL entry. */
8769 if ((info->flags & DF_TEXTREL) == 0)
8770 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8771
8772 if ((info->flags & DF_TEXTREL) != 0)
8773 {
8774 if (!add_dynamic_entry (DT_TEXTREL, 0))
8775 return FALSE;
8776 }
8777 }
8778 }
8779 #undef add_dynamic_entry
8780
8781 return TRUE;
8782 }
8783
8784 /* Determine the type of stub needed, if any, for a call. */
8785
8786 static inline enum ppc_stub_type
8787 ppc_type_of_stub (asection *input_sec,
8788 const Elf_Internal_Rela *rel,
8789 struct ppc_link_hash_entry **hash,
8790 struct plt_entry **plt_ent,
8791 bfd_vma destination)
8792 {
8793 struct ppc_link_hash_entry *h = *hash;
8794 bfd_vma location;
8795 bfd_vma branch_offset;
8796 bfd_vma max_branch_offset;
8797 enum elf_ppc64_reloc_type r_type;
8798
8799 if (h != NULL)
8800 {
8801 struct plt_entry *ent;
8802 struct ppc_link_hash_entry *fdh = h;
8803 if (h->oh != NULL
8804 && h->oh->is_func_descriptor)
8805 fdh = ppc_follow_link (h->oh);
8806
8807 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8808 if (ent->addend == rel->r_addend
8809 && ent->plt.offset != (bfd_vma) -1)
8810 {
8811 *hash = fdh;
8812 *plt_ent = ent;
8813 return ppc_stub_plt_call;
8814 }
8815
8816 /* Here, we know we don't have a plt entry. If we don't have a
8817 either a defined function descriptor or a defined entry symbol
8818 in a regular object file, then it is pointless trying to make
8819 any other type of stub. */
8820 if (!((fdh->elf.root.type == bfd_link_hash_defined
8821 || fdh->elf.root.type == bfd_link_hash_defweak)
8822 && fdh->elf.root.u.def.section->output_section != NULL)
8823 && !((h->elf.root.type == bfd_link_hash_defined
8824 || h->elf.root.type == bfd_link_hash_defweak)
8825 && h->elf.root.u.def.section->output_section != NULL))
8826 return ppc_stub_none;
8827 }
8828 else if (elf_local_got_ents (input_sec->owner) != NULL)
8829 {
8830 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
8831 struct plt_entry **local_plt = (struct plt_entry **)
8832 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
8833 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
8834
8835 if (local_plt[r_symndx] != NULL)
8836 {
8837 struct plt_entry *ent;
8838
8839 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
8840 if (ent->addend == rel->r_addend
8841 && ent->plt.offset != (bfd_vma) -1)
8842 {
8843 *plt_ent = ent;
8844 return ppc_stub_plt_call;
8845 }
8846 }
8847 }
8848
8849 /* Determine where the call point is. */
8850 location = (input_sec->output_offset
8851 + input_sec->output_section->vma
8852 + rel->r_offset);
8853
8854 branch_offset = destination - location;
8855 r_type = ELF64_R_TYPE (rel->r_info);
8856
8857 /* Determine if a long branch stub is needed. */
8858 max_branch_offset = 1 << 25;
8859 if (r_type != R_PPC64_REL24)
8860 max_branch_offset = 1 << 15;
8861
8862 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8863 /* We need a stub. Figure out whether a long_branch or plt_branch
8864 is needed later. */
8865 return ppc_stub_long_branch;
8866
8867 return ppc_stub_none;
8868 }
8869
8870 /* Build a .plt call stub. */
8871
8872 static inline bfd_byte *
8873 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8874 {
8875 #define PPC_LO(v) ((v) & 0xffff)
8876 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8877 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8878
8879 if (PPC_HA (offset) != 0)
8880 {
8881 if (r != NULL)
8882 {
8883 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8884 r[1].r_offset = r[0].r_offset + 8;
8885 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8886 r[1].r_addend = r[0].r_addend;
8887 if (PPC_HA (offset + 16) != PPC_HA (offset))
8888 {
8889 r[2].r_offset = r[1].r_offset + 4;
8890 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8891 r[2].r_addend = r[0].r_addend;
8892 }
8893 else
8894 {
8895 r[2].r_offset = r[1].r_offset + 8;
8896 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8897 r[2].r_addend = r[0].r_addend + 8;
8898 r[3].r_offset = r[2].r_offset + 4;
8899 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8900 r[3].r_addend = r[0].r_addend + 16;
8901 }
8902 }
8903 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8904 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8905 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8906 if (PPC_HA (offset + 16) != PPC_HA (offset))
8907 {
8908 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8909 offset = 0;
8910 }
8911 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8912 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8913 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8914 bfd_put_32 (obfd, BCTR, p), p += 4;
8915 }
8916 else
8917 {
8918 if (r != NULL)
8919 {
8920 r[0].r_offset += 4;
8921 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8922 if (PPC_HA (offset + 16) != PPC_HA (offset))
8923 {
8924 r[1].r_offset = r[0].r_offset + 4;
8925 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8926 r[1].r_addend = r[0].r_addend;
8927 }
8928 else
8929 {
8930 r[1].r_offset = r[0].r_offset + 8;
8931 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8932 r[1].r_addend = r[0].r_addend + 16;
8933 r[2].r_offset = r[1].r_offset + 4;
8934 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8935 r[2].r_addend = r[0].r_addend + 8;
8936 }
8937 }
8938 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8939 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8940 if (PPC_HA (offset + 16) != PPC_HA (offset))
8941 {
8942 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8943 offset = 0;
8944 }
8945 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8946 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8947 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8948 bfd_put_32 (obfd, BCTR, p), p += 4;
8949 }
8950 return p;
8951 }
8952
8953 /* Build a special .plt call stub for __tls_get_addr. */
8954
8955 #define LD_R11_0R3 0xe9630000
8956 #define LD_R12_0R3 0xe9830000
8957 #define MR_R0_R3 0x7c601b78
8958 #define CMPDI_R11_0 0x2c2b0000
8959 #define ADD_R3_R12_R13 0x7c6c6a14
8960 #define BEQLR 0x4d820020
8961 #define MR_R3_R0 0x7c030378
8962 #define MFLR_R11 0x7d6802a6
8963 #define STD_R11_0R1 0xf9610000
8964 #define BCTRL 0x4e800421
8965 #define LD_R11_0R1 0xe9610000
8966 #define LD_R2_0R1 0xe8410000
8967 #define MTLR_R11 0x7d6803a6
8968
8969 static inline bfd_byte *
8970 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
8971 Elf_Internal_Rela *r)
8972 {
8973 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
8974 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
8975 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
8976 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
8977 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
8978 bfd_put_32 (obfd, BEQLR, p), p += 4;
8979 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
8980 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
8981 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
8982
8983 if (r != NULL)
8984 r[0].r_offset += 9 * 4;
8985 p = build_plt_stub (obfd, p, offset, r);
8986 bfd_put_32 (obfd, BCTRL, p - 4);
8987
8988 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
8989 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
8990 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
8991 bfd_put_32 (obfd, BLR, p), p += 4;
8992
8993 return p;
8994 }
8995
8996 static Elf_Internal_Rela *
8997 get_relocs (asection *sec, int count)
8998 {
8999 Elf_Internal_Rela *relocs;
9000 struct bfd_elf_section_data *elfsec_data;
9001
9002 elfsec_data = elf_section_data (sec);
9003 relocs = elfsec_data->relocs;
9004 if (relocs == NULL)
9005 {
9006 bfd_size_type relsize;
9007 relsize = sec->reloc_count * sizeof (*relocs);
9008 relocs = bfd_alloc (sec->owner, relsize);
9009 if (relocs == NULL)
9010 return NULL;
9011 elfsec_data->relocs = relocs;
9012 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9013 * sizeof (Elf64_External_Rela));
9014 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9015 sec->reloc_count = 0;
9016 }
9017 relocs += sec->reloc_count;
9018 sec->reloc_count += count;
9019 return relocs;
9020 }
9021
9022 static bfd_boolean
9023 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9024 {
9025 struct ppc_stub_hash_entry *stub_entry;
9026 struct ppc_branch_hash_entry *br_entry;
9027 struct bfd_link_info *info;
9028 struct ppc_link_hash_table *htab;
9029 bfd_byte *loc;
9030 bfd_byte *p;
9031 bfd_vma dest, off;
9032 int size;
9033 Elf_Internal_Rela *r;
9034 asection *plt;
9035
9036 /* Massage our args to the form they really have. */
9037 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9038 info = in_arg;
9039
9040 htab = ppc_hash_table (info);
9041
9042 /* Make a note of the offset within the stubs for this entry. */
9043 stub_entry->stub_offset = stub_entry->stub_sec->size;
9044 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9045
9046 htab->stub_count[stub_entry->stub_type - 1] += 1;
9047 switch (stub_entry->stub_type)
9048 {
9049 case ppc_stub_long_branch:
9050 case ppc_stub_long_branch_r2off:
9051 /* Branches are relative. This is where we are going to. */
9052 off = dest = (stub_entry->target_value
9053 + stub_entry->target_section->output_offset
9054 + stub_entry->target_section->output_section->vma);
9055
9056 /* And this is where we are coming from. */
9057 off -= (stub_entry->stub_offset
9058 + stub_entry->stub_sec->output_offset
9059 + stub_entry->stub_sec->output_section->vma);
9060
9061 size = 4;
9062 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9063 {
9064 bfd_vma r2off;
9065
9066 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9067 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9068 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9069 loc += 4;
9070 size = 12;
9071 if (PPC_HA (r2off) != 0)
9072 {
9073 size = 16;
9074 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9075 loc += 4;
9076 }
9077 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9078 loc += 4;
9079 off -= size - 4;
9080 }
9081 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9082
9083 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9084 {
9085 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9086 stub_entry->root.string);
9087 htab->stub_error = TRUE;
9088 return FALSE;
9089 }
9090
9091 if (info->emitrelocations)
9092 {
9093 r = get_relocs (stub_entry->stub_sec, 1);
9094 if (r == NULL)
9095 return FALSE;
9096 r->r_offset = loc - stub_entry->stub_sec->contents;
9097 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9098 r->r_addend = dest;
9099 if (stub_entry->h != NULL)
9100 {
9101 struct elf_link_hash_entry **hashes;
9102 unsigned long symndx;
9103 struct ppc_link_hash_entry *h;
9104
9105 hashes = elf_sym_hashes (htab->stub_bfd);
9106 if (hashes == NULL)
9107 {
9108 bfd_size_type hsize;
9109
9110 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9111 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9112 if (hashes == NULL)
9113 return FALSE;
9114 elf_sym_hashes (htab->stub_bfd) = hashes;
9115 htab->stub_globals = 1;
9116 }
9117 symndx = htab->stub_globals++;
9118 h = stub_entry->h;
9119 hashes[symndx] = &h->elf;
9120 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9121 if (h->oh != NULL && h->oh->is_func)
9122 h = ppc_follow_link (h->oh);
9123 if (h->elf.root.u.def.section != stub_entry->target_section)
9124 /* H is an opd symbol. The addend must be zero. */
9125 r->r_addend = 0;
9126 else
9127 {
9128 off = (h->elf.root.u.def.value
9129 + h->elf.root.u.def.section->output_offset
9130 + h->elf.root.u.def.section->output_section->vma);
9131 r->r_addend -= off;
9132 }
9133 }
9134 }
9135 break;
9136
9137 case ppc_stub_plt_branch:
9138 case ppc_stub_plt_branch_r2off:
9139 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9140 stub_entry->root.string + 9,
9141 FALSE, FALSE);
9142 if (br_entry == NULL)
9143 {
9144 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9145 stub_entry->root.string);
9146 htab->stub_error = TRUE;
9147 return FALSE;
9148 }
9149
9150 dest = (stub_entry->target_value
9151 + stub_entry->target_section->output_offset
9152 + stub_entry->target_section->output_section->vma);
9153
9154 bfd_put_64 (htab->brlt->owner, dest,
9155 htab->brlt->contents + br_entry->offset);
9156
9157 if (br_entry->iter == htab->stub_iteration)
9158 {
9159 br_entry->iter = 0;
9160
9161 if (htab->relbrlt != NULL)
9162 {
9163 /* Create a reloc for the branch lookup table entry. */
9164 Elf_Internal_Rela rela;
9165 bfd_byte *rl;
9166
9167 rela.r_offset = (br_entry->offset
9168 + htab->brlt->output_offset
9169 + htab->brlt->output_section->vma);
9170 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9171 rela.r_addend = dest;
9172
9173 rl = htab->relbrlt->contents;
9174 rl += (htab->relbrlt->reloc_count++
9175 * sizeof (Elf64_External_Rela));
9176 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9177 }
9178 else if (info->emitrelocations)
9179 {
9180 r = get_relocs (htab->brlt, 1);
9181 if (r == NULL)
9182 return FALSE;
9183 /* brlt, being SEC_LINKER_CREATED does not go through the
9184 normal reloc processing. Symbols and offsets are not
9185 translated from input file to output file form, so
9186 set up the offset per the output file. */
9187 r->r_offset = (br_entry->offset
9188 + htab->brlt->output_offset
9189 + htab->brlt->output_section->vma);
9190 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9191 r->r_addend = dest;
9192 }
9193 }
9194
9195 dest = (br_entry->offset
9196 + htab->brlt->output_offset
9197 + htab->brlt->output_section->vma);
9198
9199 off = (dest
9200 - elf_gp (htab->brlt->output_section->owner)
9201 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9202
9203 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9204 {
9205 (*_bfd_error_handler)
9206 (_("linkage table error against `%s'"),
9207 stub_entry->root.string);
9208 bfd_set_error (bfd_error_bad_value);
9209 htab->stub_error = TRUE;
9210 return FALSE;
9211 }
9212
9213 if (info->emitrelocations)
9214 {
9215 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9216 if (r == NULL)
9217 return FALSE;
9218 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9219 if (bfd_big_endian (info->output_bfd))
9220 r[0].r_offset += 2;
9221 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9222 r[0].r_offset += 4;
9223 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9224 r[0].r_addend = dest;
9225 if (PPC_HA (off) != 0)
9226 {
9227 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9228 r[1].r_offset = r[0].r_offset + 4;
9229 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9230 r[1].r_addend = r[0].r_addend;
9231 }
9232 }
9233
9234 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9235 {
9236 if (PPC_HA (off) != 0)
9237 {
9238 size = 16;
9239 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9240 loc += 4;
9241 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9242 }
9243 else
9244 {
9245 size = 12;
9246 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9247 }
9248 }
9249 else
9250 {
9251 bfd_vma r2off;
9252
9253 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9254 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9255 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9256 loc += 4;
9257 size = 20;
9258 if (PPC_HA (off) != 0)
9259 {
9260 size += 4;
9261 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9262 loc += 4;
9263 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9264 loc += 4;
9265 }
9266 else
9267 {
9268 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9269 loc += 4;
9270 }
9271
9272 if (PPC_HA (r2off) != 0)
9273 {
9274 size += 4;
9275 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9276 loc += 4;
9277 }
9278 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9279 }
9280 loc += 4;
9281 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9282 loc += 4;
9283 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9284 break;
9285
9286 case ppc_stub_plt_call:
9287 if (stub_entry->h != NULL
9288 && stub_entry->h->is_func_descriptor
9289 && stub_entry->h->oh != NULL)
9290 {
9291 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9292
9293 /* If the old-ABI "dot-symbol" is undefined make it weak so
9294 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9295 FIXME: We used to define the symbol on one of the call
9296 stubs instead, which is why we test symbol section id
9297 against htab->top_id in various places. Likely all
9298 these checks could now disappear. */
9299 if (fh->elf.root.type == bfd_link_hash_undefined)
9300 fh->elf.root.type = bfd_link_hash_undefweak;
9301 }
9302
9303 /* Now build the stub. */
9304 dest = stub_entry->plt_ent->plt.offset & ~1;
9305 if (dest >= (bfd_vma) -2)
9306 abort ();
9307
9308 plt = htab->plt;
9309 if (!htab->elf.dynamic_sections_created
9310 || stub_entry->h == NULL
9311 || stub_entry->h->elf.dynindx == -1)
9312 plt = htab->iplt;
9313
9314 dest += plt->output_offset + plt->output_section->vma;
9315
9316 if (stub_entry->h == NULL
9317 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9318 {
9319 Elf_Internal_Rela rela;
9320 bfd_byte *rl;
9321
9322 rela.r_offset = dest;
9323 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9324 rela.r_addend = (stub_entry->target_value
9325 + stub_entry->target_section->output_offset
9326 + stub_entry->target_section->output_section->vma);
9327
9328 rl = (htab->reliplt->contents
9329 + (htab->reliplt->reloc_count++
9330 * sizeof (Elf64_External_Rela)));
9331 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9332 stub_entry->plt_ent->plt.offset |= 1;
9333 }
9334
9335 off = (dest
9336 - elf_gp (plt->output_section->owner)
9337 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9338
9339 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9340 {
9341 (*_bfd_error_handler)
9342 (_("linkage table error against `%s'"),
9343 stub_entry->h != NULL
9344 ? stub_entry->h->elf.root.root.string
9345 : "<local sym>");
9346 bfd_set_error (bfd_error_bad_value);
9347 htab->stub_error = TRUE;
9348 return FALSE;
9349 }
9350
9351 r = NULL;
9352 if (info->emitrelocations)
9353 {
9354 r = get_relocs (stub_entry->stub_sec,
9355 (2 + (PPC_HA (off) != 0)
9356 + (PPC_HA (off + 16) == PPC_HA (off))));
9357 if (r == NULL)
9358 return FALSE;
9359 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9360 if (bfd_big_endian (info->output_bfd))
9361 r[0].r_offset += 2;
9362 r[0].r_addend = dest;
9363 }
9364 if (stub_entry->h != NULL
9365 && (stub_entry->h == htab->tls_get_addr_fd
9366 || stub_entry->h == htab->tls_get_addr)
9367 && !htab->no_tls_get_addr_opt)
9368 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9369 else
9370 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9371 size = p - loc;
9372 break;
9373
9374 default:
9375 BFD_FAIL ();
9376 return FALSE;
9377 }
9378
9379 stub_entry->stub_sec->size += size;
9380
9381 if (htab->emit_stub_syms)
9382 {
9383 struct elf_link_hash_entry *h;
9384 size_t len1, len2;
9385 char *name;
9386 const char *const stub_str[] = { "long_branch",
9387 "long_branch_r2off",
9388 "plt_branch",
9389 "plt_branch_r2off",
9390 "plt_call" };
9391
9392 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9393 len2 = strlen (stub_entry->root.string);
9394 name = bfd_malloc (len1 + len2 + 2);
9395 if (name == NULL)
9396 return FALSE;
9397 memcpy (name, stub_entry->root.string, 9);
9398 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9399 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9400 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9401 if (h == NULL)
9402 return FALSE;
9403 if (h->root.type == bfd_link_hash_new)
9404 {
9405 h->root.type = bfd_link_hash_defined;
9406 h->root.u.def.section = stub_entry->stub_sec;
9407 h->root.u.def.value = stub_entry->stub_offset;
9408 h->ref_regular = 1;
9409 h->def_regular = 1;
9410 h->ref_regular_nonweak = 1;
9411 h->forced_local = 1;
9412 h->non_elf = 0;
9413 }
9414 }
9415
9416 return TRUE;
9417 }
9418
9419 /* As above, but don't actually build the stub. Just bump offset so
9420 we know stub section sizes, and select plt_branch stubs where
9421 long_branch stubs won't do. */
9422
9423 static bfd_boolean
9424 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9425 {
9426 struct ppc_stub_hash_entry *stub_entry;
9427 struct bfd_link_info *info;
9428 struct ppc_link_hash_table *htab;
9429 bfd_vma off;
9430 int size;
9431
9432 /* Massage our args to the form they really have. */
9433 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9434 info = in_arg;
9435
9436 htab = ppc_hash_table (info);
9437
9438 if (stub_entry->stub_type == ppc_stub_plt_call)
9439 {
9440 asection *plt;
9441 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9442 if (off >= (bfd_vma) -2)
9443 abort ();
9444 plt = htab->plt;
9445 if (!htab->elf.dynamic_sections_created
9446 || stub_entry->h == NULL
9447 || stub_entry->h->elf.dynindx == -1)
9448 plt = htab->iplt;
9449 off += (plt->output_offset
9450 + plt->output_section->vma
9451 - elf_gp (plt->output_section->owner)
9452 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9453
9454 size = PLT_CALL_STUB_SIZE;
9455 if (PPC_HA (off) == 0)
9456 size -= 4;
9457 if (PPC_HA (off + 16) != PPC_HA (off))
9458 size += 4;
9459 if (stub_entry->h != NULL
9460 && (stub_entry->h == htab->tls_get_addr_fd
9461 || stub_entry->h == htab->tls_get_addr)
9462 && !htab->no_tls_get_addr_opt)
9463 size += 13 * 4;
9464 if (info->emitrelocations)
9465 {
9466 stub_entry->stub_sec->reloc_count
9467 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9468 stub_entry->stub_sec->flags |= SEC_RELOC;
9469 }
9470 }
9471 else
9472 {
9473 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9474 variants. */
9475 bfd_vma r2off = 0;
9476
9477 off = (stub_entry->target_value
9478 + stub_entry->target_section->output_offset
9479 + stub_entry->target_section->output_section->vma);
9480 off -= (stub_entry->stub_sec->size
9481 + stub_entry->stub_sec->output_offset
9482 + stub_entry->stub_sec->output_section->vma);
9483
9484 /* Reset the stub type from the plt variant in case we now
9485 can reach with a shorter stub. */
9486 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9487 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9488
9489 size = 4;
9490 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9491 {
9492 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9493 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9494 size = 12;
9495 if (PPC_HA (r2off) != 0)
9496 size = 16;
9497 off -= size - 4;
9498 }
9499
9500 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9501 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9502 {
9503 struct ppc_branch_hash_entry *br_entry;
9504
9505 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9506 stub_entry->root.string + 9,
9507 TRUE, FALSE);
9508 if (br_entry == NULL)
9509 {
9510 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9511 stub_entry->root.string);
9512 htab->stub_error = TRUE;
9513 return FALSE;
9514 }
9515
9516 if (br_entry->iter != htab->stub_iteration)
9517 {
9518 br_entry->iter = htab->stub_iteration;
9519 br_entry->offset = htab->brlt->size;
9520 htab->brlt->size += 8;
9521
9522 if (htab->relbrlt != NULL)
9523 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9524 else if (info->emitrelocations)
9525 {
9526 htab->brlt->reloc_count += 1;
9527 htab->brlt->flags |= SEC_RELOC;
9528 }
9529 }
9530
9531 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9532 off = (br_entry->offset
9533 + htab->brlt->output_offset
9534 + htab->brlt->output_section->vma
9535 - elf_gp (htab->brlt->output_section->owner)
9536 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9537
9538 if (info->emitrelocations)
9539 {
9540 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9541 stub_entry->stub_sec->flags |= SEC_RELOC;
9542 }
9543
9544 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9545 {
9546 size = 12;
9547 if (PPC_HA (off) != 0)
9548 size = 16;
9549 }
9550 else
9551 {
9552 size = 20;
9553 if (PPC_HA (off) != 0)
9554 size += 4;
9555
9556 if (PPC_HA (r2off) != 0)
9557 size += 4;
9558 }
9559 }
9560 else if (info->emitrelocations)
9561 {
9562 stub_entry->stub_sec->reloc_count += 1;
9563 stub_entry->stub_sec->flags |= SEC_RELOC;
9564 }
9565 }
9566
9567 stub_entry->stub_sec->size += size;
9568 return TRUE;
9569 }
9570
9571 /* Set up various things so that we can make a list of input sections
9572 for each output section included in the link. Returns -1 on error,
9573 0 when no stubs will be needed, and 1 on success. */
9574
9575 int
9576 ppc64_elf_setup_section_lists (bfd *output_bfd,
9577 struct bfd_link_info *info,
9578 int no_multi_toc)
9579 {
9580 bfd *input_bfd;
9581 int top_id, top_index, id;
9582 asection *section;
9583 asection **input_list;
9584 bfd_size_type amt;
9585 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9586
9587 htab->no_multi_toc = no_multi_toc;
9588
9589 if (htab->brlt == NULL)
9590 return 0;
9591
9592 /* Find the top input section id. */
9593 for (input_bfd = info->input_bfds, top_id = 3;
9594 input_bfd != NULL;
9595 input_bfd = input_bfd->link_next)
9596 {
9597 for (section = input_bfd->sections;
9598 section != NULL;
9599 section = section->next)
9600 {
9601 if (top_id < section->id)
9602 top_id = section->id;
9603 }
9604 }
9605
9606 htab->top_id = top_id;
9607 amt = sizeof (struct map_stub) * (top_id + 1);
9608 htab->stub_group = bfd_zmalloc (amt);
9609 if (htab->stub_group == NULL)
9610 return -1;
9611
9612 /* Set toc_off for com, und, abs and ind sections. */
9613 for (id = 0; id < 3; id++)
9614 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9615
9616 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9617 htab->toc_bfd = NULL;
9618 htab->toc_first_sec = NULL;
9619
9620 /* We can't use output_bfd->section_count here to find the top output
9621 section index as some sections may have been removed, and
9622 strip_excluded_output_sections doesn't renumber the indices. */
9623 for (section = output_bfd->sections, top_index = 0;
9624 section != NULL;
9625 section = section->next)
9626 {
9627 if (top_index < section->index)
9628 top_index = section->index;
9629 }
9630
9631 htab->top_index = top_index;
9632 amt = sizeof (asection *) * (top_index + 1);
9633 input_list = bfd_zmalloc (amt);
9634 htab->input_list = input_list;
9635 if (input_list == NULL)
9636 return -1;
9637
9638 return 1;
9639 }
9640
9641 /* The linker repeatedly calls this function for each TOC input section
9642 and linker generated GOT section. Group input bfds such that the toc
9643 within a group is less than 64k in size. Will break with cute linker
9644 scripts that play games with dot in the output toc section. */
9645
9646 void
9647 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9648 {
9649 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9650
9651 if (!htab->no_multi_toc)
9652 {
9653 bfd_vma addr, off;
9654
9655 if (htab->toc_bfd != isec->owner)
9656 {
9657 htab->toc_bfd = isec->owner;
9658 htab->toc_first_sec = isec;
9659 }
9660 addr = isec->output_offset + isec->output_section->vma;
9661 off = addr - htab->toc_curr;
9662 if (off + isec->size > 0x10000)
9663 {
9664 addr = (htab->toc_first_sec->output_offset
9665 + htab->toc_first_sec->output_section->vma);
9666 htab->toc_curr = addr;
9667 }
9668
9669 elf_gp (isec->owner) = (htab->toc_curr
9670 - elf_gp (isec->output_section->owner)
9671 + TOC_BASE_OFF);
9672 }
9673 }
9674
9675 /* Called after the last call to the above function. */
9676
9677 void
9678 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9679 {
9680 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9681
9682 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9683
9684 /* toc_curr tracks the TOC offset used for code sections below in
9685 ppc64_elf_next_input_section. Start off at 0x8000. */
9686 htab->toc_curr = TOC_BASE_OFF;
9687 }
9688
9689 /* No toc references were found in ISEC. If the code in ISEC makes no
9690 calls, then there's no need to use toc adjusting stubs when branching
9691 into ISEC. Actually, indirect calls from ISEC are OK as they will
9692 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9693 needed, and 2 if a cyclical call-graph was found but no other reason
9694 for a stub was detected. If called from the top level, a return of
9695 2 means the same as a return of 0. */
9696
9697 static int
9698 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9699 {
9700 Elf_Internal_Rela *relstart, *rel;
9701 Elf_Internal_Sym *local_syms;
9702 int ret;
9703 struct ppc_link_hash_table *htab;
9704
9705 /* We know none of our code bearing sections will need toc stubs. */
9706 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9707 return 0;
9708
9709 if (isec->size == 0)
9710 return 0;
9711
9712 if (isec->output_section == NULL)
9713 return 0;
9714
9715 if (isec->reloc_count == 0)
9716 return 0;
9717
9718 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9719 info->keep_memory);
9720 if (relstart == NULL)
9721 return -1;
9722
9723 /* Look for branches to outside of this section. */
9724 local_syms = NULL;
9725 ret = 0;
9726 htab = ppc_hash_table (info);
9727 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9728 {
9729 enum elf_ppc64_reloc_type r_type;
9730 unsigned long r_symndx;
9731 struct elf_link_hash_entry *h;
9732 struct ppc_link_hash_entry *eh;
9733 Elf_Internal_Sym *sym;
9734 asection *sym_sec;
9735 struct _opd_sec_data *opd;
9736 bfd_vma sym_value;
9737 bfd_vma dest;
9738
9739 r_type = ELF64_R_TYPE (rel->r_info);
9740 if (r_type != R_PPC64_REL24
9741 && r_type != R_PPC64_REL14
9742 && r_type != R_PPC64_REL14_BRTAKEN
9743 && r_type != R_PPC64_REL14_BRNTAKEN)
9744 continue;
9745
9746 r_symndx = ELF64_R_SYM (rel->r_info);
9747 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9748 isec->owner))
9749 {
9750 ret = -1;
9751 break;
9752 }
9753
9754 /* Calls to dynamic lib functions go through a plt call stub
9755 that uses r2. */
9756 eh = (struct ppc_link_hash_entry *) h;
9757 if (eh != NULL
9758 && (eh->elf.plt.plist != NULL
9759 || (eh->oh != NULL
9760 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
9761 {
9762 ret = 1;
9763 break;
9764 }
9765
9766 if (sym_sec == NULL)
9767 /* Ignore other undefined symbols. */
9768 continue;
9769
9770 /* Assume branches to other sections not included in the link need
9771 stubs too, to cover -R and absolute syms. */
9772 if (sym_sec->output_section == NULL)
9773 {
9774 ret = 1;
9775 break;
9776 }
9777
9778 if (h == NULL)
9779 sym_value = sym->st_value;
9780 else
9781 {
9782 if (h->root.type != bfd_link_hash_defined
9783 && h->root.type != bfd_link_hash_defweak)
9784 abort ();
9785 sym_value = h->root.u.def.value;
9786 }
9787 sym_value += rel->r_addend;
9788
9789 /* If this branch reloc uses an opd sym, find the code section. */
9790 opd = get_opd_info (sym_sec);
9791 if (opd != NULL)
9792 {
9793 if (h == NULL && opd->adjust != NULL)
9794 {
9795 long adjust;
9796
9797 adjust = opd->adjust[sym->st_value / 8];
9798 if (adjust == -1)
9799 /* Assume deleted functions won't ever be called. */
9800 continue;
9801 sym_value += adjust;
9802 }
9803
9804 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9805 if (dest == (bfd_vma) -1)
9806 continue;
9807 }
9808 else
9809 dest = (sym_value
9810 + sym_sec->output_offset
9811 + sym_sec->output_section->vma);
9812
9813 /* Ignore branch to self. */
9814 if (sym_sec == isec)
9815 continue;
9816
9817 /* If the called function uses the toc, we need a stub. */
9818 if (sym_sec->has_toc_reloc
9819 || sym_sec->makes_toc_func_call)
9820 {
9821 ret = 1;
9822 break;
9823 }
9824
9825 /* Assume any branch that needs a long branch stub might in fact
9826 need a plt_branch stub. A plt_branch stub uses r2. */
9827 else if (dest - (isec->output_offset
9828 + isec->output_section->vma
9829 + rel->r_offset) + (1 << 25) >= (2 << 25))
9830 {
9831 ret = 1;
9832 break;
9833 }
9834
9835 /* If calling back to a section in the process of being tested, we
9836 can't say for sure that no toc adjusting stubs are needed, so
9837 don't return zero. */
9838 else if (sym_sec->call_check_in_progress)
9839 ret = 2;
9840
9841 /* Branches to another section that itself doesn't have any TOC
9842 references are OK. Recursively call ourselves to check. */
9843 else if (sym_sec->id <= htab->top_id
9844 && htab->stub_group[sym_sec->id].toc_off == 0)
9845 {
9846 int recur;
9847
9848 /* Mark current section as indeterminate, so that other
9849 sections that call back to current won't be marked as
9850 known. */
9851 isec->call_check_in_progress = 1;
9852 recur = toc_adjusting_stub_needed (info, sym_sec);
9853 isec->call_check_in_progress = 0;
9854
9855 if (recur < 0)
9856 {
9857 /* An error. Exit. */
9858 ret = -1;
9859 break;
9860 }
9861 else if (recur <= 1)
9862 {
9863 /* Known result. Mark as checked and set section flag. */
9864 htab->stub_group[sym_sec->id].toc_off = 1;
9865 if (recur != 0)
9866 {
9867 sym_sec->makes_toc_func_call = 1;
9868 ret = 1;
9869 break;
9870 }
9871 }
9872 else
9873 {
9874 /* Unknown result. Continue checking. */
9875 ret = 2;
9876 }
9877 }
9878 }
9879
9880 if (local_syms != NULL
9881 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9882 free (local_syms);
9883 if (elf_section_data (isec)->relocs != relstart)
9884 free (relstart);
9885
9886 return ret;
9887 }
9888
9889 /* The linker repeatedly calls this function for each input section,
9890 in the order that input sections are linked into output sections.
9891 Build lists of input sections to determine groupings between which
9892 we may insert linker stubs. */
9893
9894 bfd_boolean
9895 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9896 {
9897 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9898
9899 if ((isec->output_section->flags & SEC_CODE) != 0
9900 && isec->output_section->index <= htab->top_index)
9901 {
9902 asection **list = htab->input_list + isec->output_section->index;
9903 /* Steal the link_sec pointer for our list. */
9904 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9905 /* This happens to make the list in reverse order,
9906 which is what we want. */
9907 PREV_SEC (isec) = *list;
9908 *list = isec;
9909 }
9910
9911 if (htab->multi_toc_needed)
9912 {
9913 /* If a code section has a function that uses the TOC then we need
9914 to use the right TOC (obviously). Also, make sure that .opd gets
9915 the correct TOC value for R_PPC64_TOC relocs that don't have or
9916 can't find their function symbol (shouldn't ever happen now).
9917 Also specially treat .fixup for the linux kernel. .fixup
9918 contains branches, but only back to the function that hit an
9919 exception. */
9920 if (isec->has_toc_reloc
9921 || (isec->flags & SEC_CODE) == 0
9922 || strcmp (isec->name, ".fixup") == 0)
9923 {
9924 if (elf_gp (isec->owner) != 0)
9925 htab->toc_curr = elf_gp (isec->owner);
9926 }
9927 else if (htab->stub_group[isec->id].toc_off == 0)
9928 {
9929 int ret = toc_adjusting_stub_needed (info, isec);
9930 if (ret < 0)
9931 return FALSE;
9932 else
9933 isec->makes_toc_func_call = ret & 1;
9934 }
9935 }
9936
9937 /* Functions that don't use the TOC can belong in any TOC group.
9938 Use the last TOC base. This happens to make _init and _fini
9939 pasting work. */
9940 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9941 return TRUE;
9942 }
9943
9944 /* See whether we can group stub sections together. Grouping stub
9945 sections may result in fewer stubs. More importantly, we need to
9946 put all .init* and .fini* stubs at the beginning of the .init or
9947 .fini output sections respectively, because glibc splits the
9948 _init and _fini functions into multiple parts. Putting a stub in
9949 the middle of a function is not a good idea. */
9950
9951 static void
9952 group_sections (struct ppc_link_hash_table *htab,
9953 bfd_size_type stub_group_size,
9954 bfd_boolean stubs_always_before_branch)
9955 {
9956 asection **list;
9957 bfd_size_type stub14_group_size;
9958 bfd_boolean suppress_size_errors;
9959
9960 suppress_size_errors = FALSE;
9961 stub14_group_size = stub_group_size;
9962 if (stub_group_size == 1)
9963 {
9964 /* Default values. */
9965 if (stubs_always_before_branch)
9966 {
9967 stub_group_size = 0x1e00000;
9968 stub14_group_size = 0x7800;
9969 }
9970 else
9971 {
9972 stub_group_size = 0x1c00000;
9973 stub14_group_size = 0x7000;
9974 }
9975 suppress_size_errors = TRUE;
9976 }
9977
9978 list = htab->input_list + htab->top_index;
9979 do
9980 {
9981 asection *tail = *list;
9982 while (tail != NULL)
9983 {
9984 asection *curr;
9985 asection *prev;
9986 bfd_size_type total;
9987 bfd_boolean big_sec;
9988 bfd_vma curr_toc;
9989
9990 curr = tail;
9991 total = tail->size;
9992 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9993 ? stub14_group_size : stub_group_size);
9994 if (big_sec && !suppress_size_errors)
9995 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9996 tail->owner, tail);
9997 curr_toc = htab->stub_group[tail->id].toc_off;
9998
9999 while ((prev = PREV_SEC (curr)) != NULL
10000 && ((total += curr->output_offset - prev->output_offset)
10001 < (ppc64_elf_section_data (prev)->has_14bit_branch
10002 ? stub14_group_size : stub_group_size))
10003 && htab->stub_group[prev->id].toc_off == curr_toc)
10004 curr = prev;
10005
10006 /* OK, the size from the start of CURR to the end is less
10007 than stub_group_size and thus can be handled by one stub
10008 section. (or the tail section is itself larger than
10009 stub_group_size, in which case we may be toast.) We
10010 should really be keeping track of the total size of stubs
10011 added here, as stubs contribute to the final output
10012 section size. That's a little tricky, and this way will
10013 only break if stubs added make the total size more than
10014 2^25, ie. for the default stub_group_size, if stubs total
10015 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10016 do
10017 {
10018 prev = PREV_SEC (tail);
10019 /* Set up this stub group. */
10020 htab->stub_group[tail->id].link_sec = curr;
10021 }
10022 while (tail != curr && (tail = prev) != NULL);
10023
10024 /* But wait, there's more! Input sections up to stub_group_size
10025 bytes before the stub section can be handled by it too.
10026 Don't do this if we have a really large section after the
10027 stubs, as adding more stubs increases the chance that
10028 branches may not reach into the stub section. */
10029 if (!stubs_always_before_branch && !big_sec)
10030 {
10031 total = 0;
10032 while (prev != NULL
10033 && ((total += tail->output_offset - prev->output_offset)
10034 < (ppc64_elf_section_data (prev)->has_14bit_branch
10035 ? stub14_group_size : stub_group_size))
10036 && htab->stub_group[prev->id].toc_off == curr_toc)
10037 {
10038 tail = prev;
10039 prev = PREV_SEC (tail);
10040 htab->stub_group[tail->id].link_sec = curr;
10041 }
10042 }
10043 tail = prev;
10044 }
10045 }
10046 while (list-- != htab->input_list);
10047 free (htab->input_list);
10048 #undef PREV_SEC
10049 }
10050
10051 /* Determine and set the size of the stub section for a final link.
10052
10053 The basic idea here is to examine all the relocations looking for
10054 PC-relative calls to a target that is unreachable with a "bl"
10055 instruction. */
10056
10057 bfd_boolean
10058 ppc64_elf_size_stubs (bfd *output_bfd,
10059 struct bfd_link_info *info,
10060 bfd_signed_vma group_size,
10061 asection *(*add_stub_section) (const char *, asection *),
10062 void (*layout_sections_again) (void))
10063 {
10064 bfd_size_type stub_group_size;
10065 bfd_boolean stubs_always_before_branch;
10066 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10067
10068 /* Stash our params away. */
10069 htab->add_stub_section = add_stub_section;
10070 htab->layout_sections_again = layout_sections_again;
10071 stubs_always_before_branch = group_size < 0;
10072 if (group_size < 0)
10073 stub_group_size = -group_size;
10074 else
10075 stub_group_size = group_size;
10076
10077 group_sections (htab, stub_group_size, stubs_always_before_branch);
10078
10079 while (1)
10080 {
10081 bfd *input_bfd;
10082 unsigned int bfd_indx;
10083 asection *stub_sec;
10084
10085 htab->stub_iteration += 1;
10086
10087 for (input_bfd = info->input_bfds, bfd_indx = 0;
10088 input_bfd != NULL;
10089 input_bfd = input_bfd->link_next, bfd_indx++)
10090 {
10091 Elf_Internal_Shdr *symtab_hdr;
10092 asection *section;
10093 Elf_Internal_Sym *local_syms = NULL;
10094
10095 if (!is_ppc64_elf (input_bfd))
10096 continue;
10097
10098 /* We'll need the symbol table in a second. */
10099 symtab_hdr = &elf_symtab_hdr (input_bfd);
10100 if (symtab_hdr->sh_info == 0)
10101 continue;
10102
10103 /* Walk over each section attached to the input bfd. */
10104 for (section = input_bfd->sections;
10105 section != NULL;
10106 section = section->next)
10107 {
10108 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10109
10110 /* If there aren't any relocs, then there's nothing more
10111 to do. */
10112 if ((section->flags & SEC_RELOC) == 0
10113 || (section->flags & SEC_ALLOC) == 0
10114 || (section->flags & SEC_LOAD) == 0
10115 || (section->flags & SEC_CODE) == 0
10116 || section->reloc_count == 0)
10117 continue;
10118
10119 /* If this section is a link-once section that will be
10120 discarded, then don't create any stubs. */
10121 if (section->output_section == NULL
10122 || section->output_section->owner != output_bfd)
10123 continue;
10124
10125 /* Get the relocs. */
10126 internal_relocs
10127 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10128 info->keep_memory);
10129 if (internal_relocs == NULL)
10130 goto error_ret_free_local;
10131
10132 /* Now examine each relocation. */
10133 irela = internal_relocs;
10134 irelaend = irela + section->reloc_count;
10135 for (; irela < irelaend; irela++)
10136 {
10137 enum elf_ppc64_reloc_type r_type;
10138 unsigned int r_indx;
10139 enum ppc_stub_type stub_type;
10140 struct ppc_stub_hash_entry *stub_entry;
10141 asection *sym_sec, *code_sec;
10142 bfd_vma sym_value, code_value;
10143 bfd_vma destination;
10144 bfd_boolean ok_dest;
10145 struct ppc_link_hash_entry *hash;
10146 struct ppc_link_hash_entry *fdh;
10147 struct elf_link_hash_entry *h;
10148 Elf_Internal_Sym *sym;
10149 char *stub_name;
10150 const asection *id_sec;
10151 struct _opd_sec_data *opd;
10152 struct plt_entry *plt_ent;
10153
10154 r_type = ELF64_R_TYPE (irela->r_info);
10155 r_indx = ELF64_R_SYM (irela->r_info);
10156
10157 if (r_type >= R_PPC64_max)
10158 {
10159 bfd_set_error (bfd_error_bad_value);
10160 goto error_ret_free_internal;
10161 }
10162
10163 /* Only look for stubs on branch instructions. */
10164 if (r_type != R_PPC64_REL24
10165 && r_type != R_PPC64_REL14
10166 && r_type != R_PPC64_REL14_BRTAKEN
10167 && r_type != R_PPC64_REL14_BRNTAKEN)
10168 continue;
10169
10170 /* Now determine the call target, its name, value,
10171 section. */
10172 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10173 r_indx, input_bfd))
10174 goto error_ret_free_internal;
10175 hash = (struct ppc_link_hash_entry *) h;
10176
10177 ok_dest = FALSE;
10178 fdh = NULL;
10179 sym_value = 0;
10180 if (hash == NULL)
10181 {
10182 sym_value = sym->st_value;
10183 ok_dest = TRUE;
10184 }
10185 else if (hash->elf.root.type == bfd_link_hash_defined
10186 || hash->elf.root.type == bfd_link_hash_defweak)
10187 {
10188 sym_value = hash->elf.root.u.def.value;
10189 if (sym_sec->output_section != NULL)
10190 ok_dest = TRUE;
10191 }
10192 else if (hash->elf.root.type == bfd_link_hash_undefweak
10193 || hash->elf.root.type == bfd_link_hash_undefined)
10194 {
10195 /* Recognise an old ABI func code entry sym, and
10196 use the func descriptor sym instead if it is
10197 defined. */
10198 if (hash->elf.root.root.string[0] == '.'
10199 && (fdh = lookup_fdh (hash, htab)) != NULL)
10200 {
10201 if (fdh->elf.root.type == bfd_link_hash_defined
10202 || fdh->elf.root.type == bfd_link_hash_defweak)
10203 {
10204 sym_sec = fdh->elf.root.u.def.section;
10205 sym_value = fdh->elf.root.u.def.value;
10206 if (sym_sec->output_section != NULL)
10207 ok_dest = TRUE;
10208 }
10209 else
10210 fdh = NULL;
10211 }
10212 }
10213 else
10214 {
10215 bfd_set_error (bfd_error_bad_value);
10216 goto error_ret_free_internal;
10217 }
10218
10219 destination = 0;
10220 if (ok_dest)
10221 {
10222 sym_value += irela->r_addend;
10223 destination = (sym_value
10224 + sym_sec->output_offset
10225 + sym_sec->output_section->vma);
10226 }
10227
10228 code_sec = sym_sec;
10229 code_value = sym_value;
10230 opd = get_opd_info (sym_sec);
10231 if (opd != NULL)
10232 {
10233 bfd_vma dest;
10234
10235 if (hash == NULL && opd->adjust != NULL)
10236 {
10237 long adjust = opd->adjust[sym_value / 8];
10238 if (adjust == -1)
10239 continue;
10240 code_value += adjust;
10241 sym_value += adjust;
10242 }
10243 dest = opd_entry_value (sym_sec, sym_value,
10244 &code_sec, &code_value);
10245 if (dest != (bfd_vma) -1)
10246 {
10247 destination = dest;
10248 if (fdh != NULL)
10249 {
10250 /* Fixup old ABI sym to point at code
10251 entry. */
10252 hash->elf.root.type = bfd_link_hash_defweak;
10253 hash->elf.root.u.def.section = code_sec;
10254 hash->elf.root.u.def.value = code_value;
10255 }
10256 }
10257 }
10258
10259 /* Determine what (if any) linker stub is needed. */
10260 plt_ent = NULL;
10261 stub_type = ppc_type_of_stub (section, irela, &hash,
10262 &plt_ent, destination);
10263
10264 if (stub_type != ppc_stub_plt_call)
10265 {
10266 /* Check whether we need a TOC adjusting stub.
10267 Since the linker pastes together pieces from
10268 different object files when creating the
10269 _init and _fini functions, it may be that a
10270 call to what looks like a local sym is in
10271 fact a call needing a TOC adjustment. */
10272 if (code_sec != NULL
10273 && code_sec->output_section != NULL
10274 && (htab->stub_group[code_sec->id].toc_off
10275 != htab->stub_group[section->id].toc_off)
10276 && (code_sec->has_toc_reloc
10277 || code_sec->makes_toc_func_call))
10278 stub_type = ppc_stub_long_branch_r2off;
10279 }
10280
10281 if (stub_type == ppc_stub_none)
10282 continue;
10283
10284 /* __tls_get_addr calls might be eliminated. */
10285 if (stub_type != ppc_stub_plt_call
10286 && hash != NULL
10287 && (hash == htab->tls_get_addr
10288 || hash == htab->tls_get_addr_fd)
10289 && section->has_tls_reloc
10290 && irela != internal_relocs)
10291 {
10292 /* Get tls info. */
10293 char *tls_mask;
10294
10295 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10296 irela - 1, input_bfd))
10297 goto error_ret_free_internal;
10298 if (*tls_mask != 0)
10299 continue;
10300 }
10301
10302 /* Support for grouping stub sections. */
10303 id_sec = htab->stub_group[section->id].link_sec;
10304
10305 /* Get the name of this stub. */
10306 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10307 if (!stub_name)
10308 goto error_ret_free_internal;
10309
10310 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10311 stub_name, FALSE, FALSE);
10312 if (stub_entry != NULL)
10313 {
10314 /* The proper stub has already been created. */
10315 free (stub_name);
10316 continue;
10317 }
10318
10319 stub_entry = ppc_add_stub (stub_name, section, htab);
10320 if (stub_entry == NULL)
10321 {
10322 free (stub_name);
10323 error_ret_free_internal:
10324 if (elf_section_data (section)->relocs == NULL)
10325 free (internal_relocs);
10326 error_ret_free_local:
10327 if (local_syms != NULL
10328 && (symtab_hdr->contents
10329 != (unsigned char *) local_syms))
10330 free (local_syms);
10331 return FALSE;
10332 }
10333
10334 stub_entry->stub_type = stub_type;
10335 if (stub_type != ppc_stub_plt_call)
10336 {
10337 stub_entry->target_value = code_value;
10338 stub_entry->target_section = code_sec;
10339 }
10340 else
10341 {
10342 stub_entry->target_value = sym_value;
10343 stub_entry->target_section = sym_sec;
10344 }
10345 stub_entry->h = hash;
10346 stub_entry->plt_ent = plt_ent;
10347 stub_entry->addend = irela->r_addend;
10348
10349 if (stub_entry->h != NULL)
10350 htab->stub_globals += 1;
10351 }
10352
10353 /* We're done with the internal relocs, free them. */
10354 if (elf_section_data (section)->relocs != internal_relocs)
10355 free (internal_relocs);
10356 }
10357
10358 if (local_syms != NULL
10359 && symtab_hdr->contents != (unsigned char *) local_syms)
10360 {
10361 if (!info->keep_memory)
10362 free (local_syms);
10363 else
10364 symtab_hdr->contents = (unsigned char *) local_syms;
10365 }
10366 }
10367
10368 /* We may have added some stubs. Find out the new size of the
10369 stub sections. */
10370 for (stub_sec = htab->stub_bfd->sections;
10371 stub_sec != NULL;
10372 stub_sec = stub_sec->next)
10373 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10374 {
10375 stub_sec->rawsize = stub_sec->size;
10376 stub_sec->size = 0;
10377 stub_sec->reloc_count = 0;
10378 stub_sec->flags &= ~SEC_RELOC;
10379 }
10380
10381 htab->brlt->size = 0;
10382 htab->brlt->reloc_count = 0;
10383 htab->brlt->flags &= ~SEC_RELOC;
10384 if (htab->relbrlt != NULL)
10385 htab->relbrlt->size = 0;
10386
10387 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10388
10389 if (info->emitrelocations
10390 && htab->glink != NULL && htab->glink->size != 0)
10391 {
10392 htab->glink->reloc_count = 1;
10393 htab->glink->flags |= SEC_RELOC;
10394 }
10395
10396 for (stub_sec = htab->stub_bfd->sections;
10397 stub_sec != NULL;
10398 stub_sec = stub_sec->next)
10399 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10400 && stub_sec->rawsize != stub_sec->size)
10401 break;
10402
10403 /* Exit from this loop when no stubs have been added, and no stubs
10404 have changed size. */
10405 if (stub_sec == NULL)
10406 break;
10407
10408 /* Ask the linker to do its stuff. */
10409 (*htab->layout_sections_again) ();
10410 }
10411
10412 /* It would be nice to strip htab->brlt from the output if the
10413 section is empty, but it's too late. If we strip sections here,
10414 the dynamic symbol table is corrupted since the section symbol
10415 for the stripped section isn't written. */
10416
10417 return TRUE;
10418 }
10419
10420 /* Called after we have determined section placement. If sections
10421 move, we'll be called again. Provide a value for TOCstart. */
10422
10423 bfd_vma
10424 ppc64_elf_toc (bfd *obfd)
10425 {
10426 asection *s;
10427 bfd_vma TOCstart;
10428
10429 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10430 order. The TOC starts where the first of these sections starts. */
10431 s = bfd_get_section_by_name (obfd, ".got");
10432 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10433 s = bfd_get_section_by_name (obfd, ".toc");
10434 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10435 s = bfd_get_section_by_name (obfd, ".tocbss");
10436 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10437 s = bfd_get_section_by_name (obfd, ".plt");
10438 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10439 {
10440 /* This may happen for
10441 o references to TOC base (SYM@toc / TOC[tc0]) without a
10442 .toc directive
10443 o bad linker script
10444 o --gc-sections and empty TOC sections
10445
10446 FIXME: Warn user? */
10447
10448 /* Look for a likely section. We probably won't even be
10449 using TOCstart. */
10450 for (s = obfd->sections; s != NULL; s = s->next)
10451 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10452 | SEC_EXCLUDE))
10453 == (SEC_ALLOC | SEC_SMALL_DATA))
10454 break;
10455 if (s == NULL)
10456 for (s = obfd->sections; s != NULL; s = s->next)
10457 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10458 == (SEC_ALLOC | SEC_SMALL_DATA))
10459 break;
10460 if (s == NULL)
10461 for (s = obfd->sections; s != NULL; s = s->next)
10462 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10463 == SEC_ALLOC)
10464 break;
10465 if (s == NULL)
10466 for (s = obfd->sections; s != NULL; s = s->next)
10467 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10468 break;
10469 }
10470
10471 TOCstart = 0;
10472 if (s != NULL)
10473 TOCstart = s->output_section->vma + s->output_offset;
10474
10475 return TOCstart;
10476 }
10477
10478 /* Build all the stubs associated with the current output file.
10479 The stubs are kept in a hash table attached to the main linker
10480 hash table. This function is called via gldelf64ppc_finish. */
10481
10482 bfd_boolean
10483 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10484 struct bfd_link_info *info,
10485 char **stats)
10486 {
10487 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10488 asection *stub_sec;
10489 bfd_byte *p;
10490 int stub_sec_count = 0;
10491
10492 htab->emit_stub_syms = emit_stub_syms;
10493
10494 /* Allocate memory to hold the linker stubs. */
10495 for (stub_sec = htab->stub_bfd->sections;
10496 stub_sec != NULL;
10497 stub_sec = stub_sec->next)
10498 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10499 && stub_sec->size != 0)
10500 {
10501 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
10502 if (stub_sec->contents == NULL)
10503 return FALSE;
10504 /* We want to check that built size is the same as calculated
10505 size. rawsize is a convenient location to use. */
10506 stub_sec->rawsize = stub_sec->size;
10507 stub_sec->size = 0;
10508 }
10509
10510 if (htab->glink != NULL && htab->glink->size != 0)
10511 {
10512 unsigned int indx;
10513 bfd_vma plt0;
10514
10515 /* Build the .glink plt call stub. */
10516 if (htab->emit_stub_syms)
10517 {
10518 struct elf_link_hash_entry *h;
10519 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
10520 TRUE, FALSE, FALSE);
10521 if (h == NULL)
10522 return FALSE;
10523 if (h->root.type == bfd_link_hash_new)
10524 {
10525 h->root.type = bfd_link_hash_defined;
10526 h->root.u.def.section = htab->glink;
10527 h->root.u.def.value = 8;
10528 h->ref_regular = 1;
10529 h->def_regular = 1;
10530 h->ref_regular_nonweak = 1;
10531 h->forced_local = 1;
10532 h->non_elf = 0;
10533 }
10534 }
10535 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10536 if (info->emitrelocations)
10537 {
10538 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10539 if (r == NULL)
10540 return FALSE;
10541 r->r_offset = (htab->glink->output_offset
10542 + htab->glink->output_section->vma);
10543 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10544 r->r_addend = plt0;
10545 }
10546 p = htab->glink->contents;
10547 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10548 bfd_put_64 (htab->glink->owner, plt0, p);
10549 p += 8;
10550 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
10551 p += 4;
10552 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
10553 p += 4;
10554 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
10555 p += 4;
10556 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
10557 p += 4;
10558 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
10559 p += 4;
10560 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10561 p += 4;
10562 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10563 p += 4;
10564 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10565 p += 4;
10566 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10567 p += 4;
10568 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10569 p += 4;
10570 bfd_put_32 (htab->glink->owner, BCTR, p);
10571 p += 4;
10572 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10573 {
10574 bfd_put_32 (htab->glink->owner, NOP, p);
10575 p += 4;
10576 }
10577
10578 /* Build the .glink lazy link call stubs. */
10579 indx = 0;
10580 while (p < htab->glink->contents + htab->glink->size)
10581 {
10582 if (indx < 0x8000)
10583 {
10584 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10585 p += 4;
10586 }
10587 else
10588 {
10589 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10590 p += 4;
10591 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10592 p += 4;
10593 }
10594 bfd_put_32 (htab->glink->owner,
10595 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10596 indx++;
10597 p += 4;
10598 }
10599 htab->glink->rawsize = p - htab->glink->contents;
10600 }
10601
10602 if (htab->brlt->size != 0)
10603 {
10604 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10605 htab->brlt->size);
10606 if (htab->brlt->contents == NULL)
10607 return FALSE;
10608 }
10609 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10610 {
10611 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10612 htab->relbrlt->size);
10613 if (htab->relbrlt->contents == NULL)
10614 return FALSE;
10615 }
10616
10617 /* Build the stubs as directed by the stub hash table. */
10618 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10619
10620 if (htab->relbrlt != NULL)
10621 htab->relbrlt->reloc_count = 0;
10622
10623 for (stub_sec = htab->stub_bfd->sections;
10624 stub_sec != NULL;
10625 stub_sec = stub_sec->next)
10626 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10627 {
10628 stub_sec_count += 1;
10629 if (stub_sec->rawsize != stub_sec->size)
10630 break;
10631 }
10632
10633 if (stub_sec != NULL
10634 || htab->glink->rawsize != htab->glink->size)
10635 {
10636 htab->stub_error = TRUE;
10637 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10638 }
10639
10640 if (htab->stub_error)
10641 return FALSE;
10642
10643 if (stats != NULL)
10644 {
10645 *stats = bfd_malloc (500);
10646 if (*stats == NULL)
10647 return FALSE;
10648
10649 sprintf (*stats, _("linker stubs in %u group%s\n"
10650 " branch %lu\n"
10651 " toc adjust %lu\n"
10652 " long branch %lu\n"
10653 " long toc adj %lu\n"
10654 " plt call %lu"),
10655 stub_sec_count,
10656 stub_sec_count == 1 ? "" : "s",
10657 htab->stub_count[ppc_stub_long_branch - 1],
10658 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10659 htab->stub_count[ppc_stub_plt_branch - 1],
10660 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10661 htab->stub_count[ppc_stub_plt_call - 1]);
10662 }
10663 return TRUE;
10664 }
10665
10666 /* This function undoes the changes made by add_symbol_adjust. */
10667
10668 static bfd_boolean
10669 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10670 {
10671 struct ppc_link_hash_entry *eh;
10672
10673 if (h->root.type == bfd_link_hash_indirect)
10674 return TRUE;
10675
10676 if (h->root.type == bfd_link_hash_warning)
10677 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10678
10679 eh = (struct ppc_link_hash_entry *) h;
10680 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10681 return TRUE;
10682
10683 eh->elf.root.type = bfd_link_hash_undefined;
10684 return TRUE;
10685 }
10686
10687 void
10688 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10689 {
10690 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10691 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10692 }
10693
10694 /* What to do when ld finds relocations against symbols defined in
10695 discarded sections. */
10696
10697 static unsigned int
10698 ppc64_elf_action_discarded (asection *sec)
10699 {
10700 if (strcmp (".opd", sec->name) == 0)
10701 return 0;
10702
10703 if (strcmp (".toc", sec->name) == 0)
10704 return 0;
10705
10706 if (strcmp (".toc1", sec->name) == 0)
10707 return 0;
10708
10709 return _bfd_elf_default_action_discarded (sec);
10710 }
10711
10712 /* The RELOCATE_SECTION function is called by the ELF backend linker
10713 to handle the relocations for a section.
10714
10715 The relocs are always passed as Rela structures; if the section
10716 actually uses Rel structures, the r_addend field will always be
10717 zero.
10718
10719 This function is responsible for adjust the section contents as
10720 necessary, and (if using Rela relocs and generating a
10721 relocatable output file) adjusting the reloc addend as
10722 necessary.
10723
10724 This function does not have to worry about setting the reloc
10725 address or the reloc symbol index.
10726
10727 LOCAL_SYMS is a pointer to the swapped in local symbols.
10728
10729 LOCAL_SECTIONS is an array giving the section in the input file
10730 corresponding to the st_shndx field of each local symbol.
10731
10732 The global hash table entry for the global symbols can be found
10733 via elf_sym_hashes (input_bfd).
10734
10735 When generating relocatable output, this function must handle
10736 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10737 going to be the section symbol corresponding to the output
10738 section, which means that the addend must be adjusted
10739 accordingly. */
10740
10741 static bfd_boolean
10742 ppc64_elf_relocate_section (bfd *output_bfd,
10743 struct bfd_link_info *info,
10744 bfd *input_bfd,
10745 asection *input_section,
10746 bfd_byte *contents,
10747 Elf_Internal_Rela *relocs,
10748 Elf_Internal_Sym *local_syms,
10749 asection **local_sections)
10750 {
10751 struct ppc_link_hash_table *htab;
10752 Elf_Internal_Shdr *symtab_hdr;
10753 struct elf_link_hash_entry **sym_hashes;
10754 Elf_Internal_Rela *rel;
10755 Elf_Internal_Rela *relend;
10756 Elf_Internal_Rela outrel;
10757 bfd_byte *loc;
10758 struct got_entry **local_got_ents;
10759 bfd_vma TOCstart;
10760 bfd_boolean ret = TRUE;
10761 bfd_boolean is_opd;
10762 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10763 bfd_boolean is_power4 = FALSE;
10764 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10765
10766 /* Initialize howto table if needed. */
10767 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10768 ppc_howto_init ();
10769
10770 htab = ppc_hash_table (info);
10771
10772 /* Don't relocate stub sections. */
10773 if (input_section->owner == htab->stub_bfd)
10774 return TRUE;
10775
10776 BFD_ASSERT (is_ppc64_elf (input_bfd));
10777
10778 local_got_ents = elf_local_got_ents (input_bfd);
10779 TOCstart = elf_gp (output_bfd);
10780 symtab_hdr = &elf_symtab_hdr (input_bfd);
10781 sym_hashes = elf_sym_hashes (input_bfd);
10782 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10783
10784 rel = relocs;
10785 relend = relocs + input_section->reloc_count;
10786 for (; rel < relend; rel++)
10787 {
10788 enum elf_ppc64_reloc_type r_type;
10789 bfd_vma addend, orig_addend;
10790 bfd_reloc_status_type r;
10791 Elf_Internal_Sym *sym;
10792 asection *sec;
10793 struct elf_link_hash_entry *h_elf;
10794 struct ppc_link_hash_entry *h;
10795 struct ppc_link_hash_entry *fdh;
10796 const char *sym_name;
10797 unsigned long r_symndx, toc_symndx;
10798 bfd_vma toc_addend;
10799 char tls_mask, tls_gd, tls_type;
10800 char sym_type;
10801 bfd_vma relocation;
10802 bfd_boolean unresolved_reloc;
10803 bfd_boolean warned;
10804 unsigned long insn, mask;
10805 struct ppc_stub_hash_entry *stub_entry;
10806 bfd_vma max_br_offset;
10807 bfd_vma from;
10808
10809 r_type = ELF64_R_TYPE (rel->r_info);
10810 r_symndx = ELF64_R_SYM (rel->r_info);
10811
10812 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10813 symbol of the previous ADDR64 reloc. The symbol gives us the
10814 proper TOC base to use. */
10815 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10816 && rel != relocs
10817 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10818 && is_opd)
10819 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10820
10821 sym = NULL;
10822 sec = NULL;
10823 h_elf = NULL;
10824 sym_name = NULL;
10825 unresolved_reloc = FALSE;
10826 warned = FALSE;
10827 orig_addend = rel->r_addend;
10828
10829 if (r_symndx < symtab_hdr->sh_info)
10830 {
10831 /* It's a local symbol. */
10832 struct _opd_sec_data *opd;
10833
10834 sym = local_syms + r_symndx;
10835 sec = local_sections[r_symndx];
10836 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10837 sym_type = ELF64_ST_TYPE (sym->st_info);
10838 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10839 opd = get_opd_info (sec);
10840 if (opd != NULL && opd->adjust != NULL)
10841 {
10842 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10843 if (adjust == -1)
10844 relocation = 0;
10845 else
10846 {
10847 /* If this is a relocation against the opd section sym
10848 and we have edited .opd, adjust the reloc addend so
10849 that ld -r and ld --emit-relocs output is correct.
10850 If it is a reloc against some other .opd symbol,
10851 then the symbol value will be adjusted later. */
10852 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10853 rel->r_addend += adjust;
10854 else
10855 relocation += adjust;
10856 }
10857 }
10858 }
10859 else
10860 {
10861 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10862 r_symndx, symtab_hdr, sym_hashes,
10863 h_elf, sec, relocation,
10864 unresolved_reloc, warned);
10865 sym_name = h_elf->root.root.string;
10866 sym_type = h_elf->type;
10867 }
10868 h = (struct ppc_link_hash_entry *) h_elf;
10869
10870 if (sec != NULL && elf_discarded_section (sec))
10871 {
10872 /* For relocs against symbols from removed linkonce sections,
10873 or sections discarded by a linker script, we just want the
10874 section contents zeroed. Avoid any special processing. */
10875 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10876 contents + rel->r_offset);
10877 rel->r_info = 0;
10878 rel->r_addend = 0;
10879 continue;
10880 }
10881
10882 if (info->relocatable)
10883 continue;
10884
10885 /* TLS optimizations. Replace instruction sequences and relocs
10886 based on information we collected in tls_optimize. We edit
10887 RELOCS so that --emit-relocs will output something sensible
10888 for the final instruction stream. */
10889 tls_mask = 0;
10890 tls_gd = 0;
10891 toc_symndx = 0;
10892 if (h != NULL)
10893 tls_mask = h->tls_mask;
10894 else if (local_got_ents != NULL)
10895 {
10896 struct plt_entry **local_plt = (struct plt_entry **)
10897 (local_got_ents + symtab_hdr->sh_info);
10898 char *lgot_masks = (char *)
10899 (local_plt + symtab_hdr->sh_info);
10900 tls_mask = lgot_masks[r_symndx];
10901 }
10902 if (tls_mask == 0
10903 && (r_type == R_PPC64_TLS
10904 || r_type == R_PPC64_TLSGD
10905 || r_type == R_PPC64_TLSLD))
10906 {
10907 /* Check for toc tls entries. */
10908 char *toc_tls;
10909
10910 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10911 &local_syms, rel, input_bfd))
10912 return FALSE;
10913
10914 if (toc_tls)
10915 tls_mask = *toc_tls;
10916 }
10917
10918 /* Check that tls relocs are used with tls syms, and non-tls
10919 relocs are used with non-tls syms. */
10920 if (r_symndx != 0
10921 && r_type != R_PPC64_NONE
10922 && (h == NULL
10923 || h->elf.root.type == bfd_link_hash_defined
10924 || h->elf.root.type == bfd_link_hash_defweak)
10925 && (IS_PPC64_TLS_RELOC (r_type)
10926 != (sym_type == STT_TLS
10927 || (sym_type == STT_SECTION
10928 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10929 {
10930 if (tls_mask != 0
10931 && (r_type == R_PPC64_TLS
10932 || r_type == R_PPC64_TLSGD
10933 || r_type == R_PPC64_TLSLD))
10934 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10935 ;
10936 else
10937 (*_bfd_error_handler)
10938 (!IS_PPC64_TLS_RELOC (r_type)
10939 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10940 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10941 input_bfd,
10942 input_section,
10943 (long) rel->r_offset,
10944 ppc64_elf_howto_table[r_type]->name,
10945 sym_name);
10946 }
10947
10948 /* Ensure reloc mapping code below stays sane. */
10949 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10950 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10951 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10952 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10953 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10954 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10955 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10956 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10957 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10958 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10959 abort ();
10960
10961 switch (r_type)
10962 {
10963 default:
10964 break;
10965
10966 case R_PPC64_TOC16:
10967 case R_PPC64_TOC16_LO:
10968 case R_PPC64_TOC16_DS:
10969 case R_PPC64_TOC16_LO_DS:
10970 {
10971 /* Check for toc tls entries. */
10972 char *toc_tls;
10973 int retval;
10974
10975 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10976 &local_syms, rel, input_bfd);
10977 if (retval == 0)
10978 return FALSE;
10979
10980 if (toc_tls)
10981 {
10982 tls_mask = *toc_tls;
10983 if (r_type == R_PPC64_TOC16_DS
10984 || r_type == R_PPC64_TOC16_LO_DS)
10985 {
10986 if (tls_mask != 0
10987 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10988 goto toctprel;
10989 }
10990 else
10991 {
10992 /* If we found a GD reloc pair, then we might be
10993 doing a GD->IE transition. */
10994 if (retval == 2)
10995 {
10996 tls_gd = TLS_TPRELGD;
10997 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10998 goto tls_ldgd_opt;
10999 }
11000 else if (retval == 3)
11001 {
11002 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11003 goto tls_ldgd_opt;
11004 }
11005 }
11006 }
11007 }
11008 break;
11009
11010 case R_PPC64_GOT_TPREL16_DS:
11011 case R_PPC64_GOT_TPREL16_LO_DS:
11012 if (tls_mask != 0
11013 && (tls_mask & TLS_TPREL) == 0)
11014 {
11015 toctprel:
11016 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11017 insn &= 31 << 21;
11018 insn |= 0x3c0d0000; /* addis 0,13,0 */
11019 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11020 r_type = R_PPC64_TPREL16_HA;
11021 if (toc_symndx != 0)
11022 {
11023 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11024 rel->r_addend = toc_addend;
11025 /* We changed the symbol. Start over in order to
11026 get h, sym, sec etc. right. */
11027 rel--;
11028 continue;
11029 }
11030 else
11031 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11032 }
11033 break;
11034
11035 case R_PPC64_TLS:
11036 if (tls_mask != 0
11037 && (tls_mask & TLS_TPREL) == 0)
11038 {
11039 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11040 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11041 if (insn == 0)
11042 abort ();
11043 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11044 /* Was PPC64_TLS which sits on insn boundary, now
11045 PPC64_TPREL16_LO which is at low-order half-word. */
11046 rel->r_offset += d_offset;
11047 r_type = R_PPC64_TPREL16_LO;
11048 if (toc_symndx != 0)
11049 {
11050 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11051 rel->r_addend = toc_addend;
11052 /* We changed the symbol. Start over in order to
11053 get h, sym, sec etc. right. */
11054 rel--;
11055 continue;
11056 }
11057 else
11058 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11059 }
11060 break;
11061
11062 case R_PPC64_GOT_TLSGD16_HI:
11063 case R_PPC64_GOT_TLSGD16_HA:
11064 tls_gd = TLS_TPRELGD;
11065 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11066 goto tls_gdld_hi;
11067 break;
11068
11069 case R_PPC64_GOT_TLSLD16_HI:
11070 case R_PPC64_GOT_TLSLD16_HA:
11071 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11072 {
11073 tls_gdld_hi:
11074 if ((tls_mask & tls_gd) != 0)
11075 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11076 + R_PPC64_GOT_TPREL16_DS);
11077 else
11078 {
11079 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11080 rel->r_offset -= d_offset;
11081 r_type = R_PPC64_NONE;
11082 }
11083 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11084 }
11085 break;
11086
11087 case R_PPC64_GOT_TLSGD16:
11088 case R_PPC64_GOT_TLSGD16_LO:
11089 tls_gd = TLS_TPRELGD;
11090 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11091 goto tls_ldgd_opt;
11092 break;
11093
11094 case R_PPC64_GOT_TLSLD16:
11095 case R_PPC64_GOT_TLSLD16_LO:
11096 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11097 {
11098 unsigned int insn1, insn2, insn3;
11099 bfd_vma offset;
11100
11101 tls_ldgd_opt:
11102 offset = (bfd_vma) -1;
11103 /* If not using the newer R_PPC64_TLSGD/LD to mark
11104 __tls_get_addr calls, we must trust that the call
11105 stays with its arg setup insns, ie. that the next
11106 reloc is the __tls_get_addr call associated with
11107 the current reloc. Edit both insns. */
11108 if (input_section->has_tls_get_addr_call
11109 && rel + 1 < relend
11110 && branch_reloc_hash_match (input_bfd, rel + 1,
11111 htab->tls_get_addr,
11112 htab->tls_get_addr_fd))
11113 offset = rel[1].r_offset;
11114 if ((tls_mask & tls_gd) != 0)
11115 {
11116 /* IE */
11117 insn1 = bfd_get_32 (output_bfd,
11118 contents + rel->r_offset - d_offset);
11119 insn1 &= (1 << 26) - (1 << 2);
11120 insn1 |= 58 << 26; /* ld */
11121 insn2 = 0x7c636a14; /* add 3,3,13 */
11122 if (offset != (bfd_vma) -1)
11123 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11124 if ((tls_mask & TLS_EXPLICIT) == 0)
11125 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11126 + R_PPC64_GOT_TPREL16_DS);
11127 else
11128 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11129 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11130 }
11131 else
11132 {
11133 /* LE */
11134 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11135 insn2 = 0x38630000; /* addi 3,3,0 */
11136 if (tls_gd == 0)
11137 {
11138 /* Was an LD reloc. */
11139 if (toc_symndx)
11140 sec = local_sections[toc_symndx];
11141 for (r_symndx = 0;
11142 r_symndx < symtab_hdr->sh_info;
11143 r_symndx++)
11144 if (local_sections[r_symndx] == sec)
11145 break;
11146 if (r_symndx >= symtab_hdr->sh_info)
11147 r_symndx = 0;
11148 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11149 if (r_symndx != 0)
11150 rel->r_addend -= (local_syms[r_symndx].st_value
11151 + sec->output_offset
11152 + sec->output_section->vma);
11153 }
11154 else if (toc_symndx != 0)
11155 {
11156 r_symndx = toc_symndx;
11157 rel->r_addend = toc_addend;
11158 }
11159 r_type = R_PPC64_TPREL16_HA;
11160 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11161 if (offset != (bfd_vma) -1)
11162 {
11163 rel[1].r_info = ELF64_R_INFO (r_symndx,
11164 R_PPC64_TPREL16_LO);
11165 rel[1].r_offset = offset + d_offset;
11166 rel[1].r_addend = rel->r_addend;
11167 }
11168 }
11169 bfd_put_32 (output_bfd, insn1,
11170 contents + rel->r_offset - d_offset);
11171 if (offset != (bfd_vma) -1)
11172 {
11173 insn3 = bfd_get_32 (output_bfd,
11174 contents + offset + 4);
11175 if (insn3 == NOP
11176 || insn3 == CROR_151515 || insn3 == CROR_313131)
11177 {
11178 rel[1].r_offset += 4;
11179 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11180 insn2 = NOP;
11181 }
11182 bfd_put_32 (output_bfd, insn2, contents + offset);
11183 }
11184 if ((tls_mask & tls_gd) == 0
11185 && (tls_gd == 0 || toc_symndx != 0))
11186 {
11187 /* We changed the symbol. Start over in order
11188 to get h, sym, sec etc. right. */
11189 rel--;
11190 continue;
11191 }
11192 }
11193 break;
11194
11195 case R_PPC64_TLSGD:
11196 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11197 {
11198 unsigned int insn2, insn3;
11199 bfd_vma offset = rel->r_offset;
11200
11201 if ((tls_mask & TLS_TPRELGD) != 0)
11202 {
11203 /* IE */
11204 r_type = R_PPC64_NONE;
11205 insn2 = 0x7c636a14; /* add 3,3,13 */
11206 }
11207 else
11208 {
11209 /* LE */
11210 if (toc_symndx != 0)
11211 {
11212 r_symndx = toc_symndx;
11213 rel->r_addend = toc_addend;
11214 }
11215 r_type = R_PPC64_TPREL16_LO;
11216 rel->r_offset = offset + d_offset;
11217 insn2 = 0x38630000; /* addi 3,3,0 */
11218 }
11219 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11220 /* Zap the reloc on the _tls_get_addr call too. */
11221 BFD_ASSERT (offset == rel[1].r_offset);
11222 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11223 insn3 = bfd_get_32 (output_bfd,
11224 contents + offset + 4);
11225 if (insn3 == NOP
11226 || insn3 == CROR_151515 || insn3 == CROR_313131)
11227 {
11228 rel->r_offset += 4;
11229 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11230 insn2 = NOP;
11231 }
11232 bfd_put_32 (output_bfd, insn2, contents + offset);
11233 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11234 {
11235 rel--;
11236 continue;
11237 }
11238 }
11239 break;
11240
11241 case R_PPC64_TLSLD:
11242 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11243 {
11244 unsigned int insn2, insn3;
11245 bfd_vma offset = rel->r_offset;
11246
11247 if (toc_symndx)
11248 sec = local_sections[toc_symndx];
11249 for (r_symndx = 0;
11250 r_symndx < symtab_hdr->sh_info;
11251 r_symndx++)
11252 if (local_sections[r_symndx] == sec)
11253 break;
11254 if (r_symndx >= symtab_hdr->sh_info)
11255 r_symndx = 0;
11256 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11257 if (r_symndx != 0)
11258 rel->r_addend -= (local_syms[r_symndx].st_value
11259 + sec->output_offset
11260 + sec->output_section->vma);
11261
11262 r_type = R_PPC64_TPREL16_LO;
11263 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11264 rel->r_offset = offset + d_offset;
11265 /* Zap the reloc on the _tls_get_addr call too. */
11266 BFD_ASSERT (offset == rel[1].r_offset);
11267 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11268 insn2 = 0x38630000; /* addi 3,3,0 */
11269 insn3 = bfd_get_32 (output_bfd,
11270 contents + offset + 4);
11271 if (insn3 == NOP
11272 || insn3 == CROR_151515 || insn3 == CROR_313131)
11273 {
11274 rel->r_offset += 4;
11275 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11276 insn2 = NOP;
11277 }
11278 bfd_put_32 (output_bfd, insn2, contents + offset);
11279 rel--;
11280 continue;
11281 }
11282 break;
11283
11284 case R_PPC64_DTPMOD64:
11285 if (rel + 1 < relend
11286 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11287 && rel[1].r_offset == rel->r_offset + 8)
11288 {
11289 if ((tls_mask & TLS_GD) == 0)
11290 {
11291 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11292 if ((tls_mask & TLS_TPRELGD) != 0)
11293 r_type = R_PPC64_TPREL64;
11294 else
11295 {
11296 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11297 r_type = R_PPC64_NONE;
11298 }
11299 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11300 }
11301 }
11302 else
11303 {
11304 if ((tls_mask & TLS_LD) == 0)
11305 {
11306 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11307 r_type = R_PPC64_NONE;
11308 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11309 }
11310 }
11311 break;
11312
11313 case R_PPC64_TPREL64:
11314 if ((tls_mask & TLS_TPREL) == 0)
11315 {
11316 r_type = R_PPC64_NONE;
11317 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11318 }
11319 break;
11320 }
11321
11322 /* Handle other relocations that tweak non-addend part of insn. */
11323 insn = 0;
11324 max_br_offset = 1 << 25;
11325 addend = rel->r_addend;
11326 switch (r_type)
11327 {
11328 default:
11329 break;
11330
11331 /* Branch taken prediction relocations. */
11332 case R_PPC64_ADDR14_BRTAKEN:
11333 case R_PPC64_REL14_BRTAKEN:
11334 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11335 /* Fall thru. */
11336
11337 /* Branch not taken prediction relocations. */
11338 case R_PPC64_ADDR14_BRNTAKEN:
11339 case R_PPC64_REL14_BRNTAKEN:
11340 insn |= bfd_get_32 (output_bfd,
11341 contents + rel->r_offset) & ~(0x01 << 21);
11342 /* Fall thru. */
11343
11344 case R_PPC64_REL14:
11345 max_br_offset = 1 << 15;
11346 /* Fall thru. */
11347
11348 case R_PPC64_REL24:
11349 /* Calls to functions with a different TOC, such as calls to
11350 shared objects, need to alter the TOC pointer. This is
11351 done using a linkage stub. A REL24 branching to these
11352 linkage stubs needs to be followed by a nop, as the nop
11353 will be replaced with an instruction to restore the TOC
11354 base pointer. */
11355 stub_entry = NULL;
11356 fdh = h;
11357 if (h != NULL
11358 && h->oh != NULL
11359 && h->oh->is_func_descriptor)
11360 fdh = ppc_follow_link (h->oh);
11361 if (((fdh != NULL
11362 && fdh->elf.plt.plist != NULL)
11363 || (sec != NULL
11364 && sec->output_section != NULL
11365 && sec->id <= htab->top_id
11366 && (htab->stub_group[sec->id].toc_off
11367 != htab->stub_group[input_section->id].toc_off))
11368 || (h == NULL
11369 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11370 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11371 rel, htab)) != NULL
11372 && (stub_entry->stub_type == ppc_stub_plt_call
11373 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11374 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11375 {
11376 bfd_boolean can_plt_call = FALSE;
11377
11378 if (rel->r_offset + 8 <= input_section->size)
11379 {
11380 unsigned long nop;
11381 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11382 if (nop == NOP
11383 || nop == CROR_151515 || nop == CROR_313131)
11384 {
11385 if (h != NULL
11386 && (h == htab->tls_get_addr_fd
11387 || h == htab->tls_get_addr)
11388 && !htab->no_tls_get_addr_opt)
11389 {
11390 /* Special stub used, leave nop alone. */
11391 }
11392 else
11393 bfd_put_32 (input_bfd, LD_R2_40R1,
11394 contents + rel->r_offset + 4);
11395 can_plt_call = TRUE;
11396 }
11397 }
11398
11399 if (!can_plt_call)
11400 {
11401 if (stub_entry->stub_type == ppc_stub_plt_call)
11402 {
11403 /* If this is a plain branch rather than a branch
11404 and link, don't require a nop. However, don't
11405 allow tail calls in a shared library as they
11406 will result in r2 being corrupted. */
11407 unsigned long br;
11408 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11409 if (info->executable && (br & 1) == 0)
11410 can_plt_call = TRUE;
11411 else
11412 stub_entry = NULL;
11413 }
11414 else if (h != NULL
11415 && strcmp (h->elf.root.root.string,
11416 ".__libc_start_main") == 0)
11417 {
11418 /* Allow crt1 branch to go via a toc adjusting stub. */
11419 can_plt_call = TRUE;
11420 }
11421 else
11422 {
11423 if (strcmp (input_section->output_section->name,
11424 ".init") == 0
11425 || strcmp (input_section->output_section->name,
11426 ".fini") == 0)
11427 (*_bfd_error_handler)
11428 (_("%B(%A+0x%lx): automatic multiple TOCs "
11429 "not supported using your crt files; "
11430 "recompile with -mminimal-toc or upgrade gcc"),
11431 input_bfd,
11432 input_section,
11433 (long) rel->r_offset);
11434 else
11435 (*_bfd_error_handler)
11436 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11437 "does not allow automatic multiple TOCs; "
11438 "recompile with -mminimal-toc or "
11439 "-fno-optimize-sibling-calls, "
11440 "or make `%s' extern"),
11441 input_bfd,
11442 input_section,
11443 (long) rel->r_offset,
11444 sym_name,
11445 sym_name);
11446 bfd_set_error (bfd_error_bad_value);
11447 ret = FALSE;
11448 }
11449 }
11450
11451 if (can_plt_call
11452 && stub_entry->stub_type == ppc_stub_plt_call)
11453 unresolved_reloc = FALSE;
11454 }
11455
11456 if (stub_entry == NULL
11457 && get_opd_info (sec) != NULL)
11458 {
11459 /* The branch destination is the value of the opd entry. */
11460 bfd_vma off = (relocation + addend
11461 - sec->output_section->vma
11462 - sec->output_offset);
11463 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
11464 if (dest != (bfd_vma) -1)
11465 {
11466 relocation = dest;
11467 addend = 0;
11468 }
11469 }
11470
11471 /* If the branch is out of reach we ought to have a long
11472 branch stub. */
11473 from = (rel->r_offset
11474 + input_section->output_offset
11475 + input_section->output_section->vma);
11476
11477 if (stub_entry == NULL
11478 && (relocation + addend - from + max_br_offset
11479 >= 2 * max_br_offset)
11480 && r_type != R_PPC64_ADDR14_BRTAKEN
11481 && r_type != R_PPC64_ADDR14_BRNTAKEN)
11482 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
11483 htab);
11484
11485 if (stub_entry != NULL)
11486 {
11487 /* Munge up the value and addend so that we call the stub
11488 rather than the procedure directly. */
11489 relocation = (stub_entry->stub_offset
11490 + stub_entry->stub_sec->output_offset
11491 + stub_entry->stub_sec->output_section->vma);
11492 addend = 0;
11493 }
11494
11495 if (insn != 0)
11496 {
11497 if (is_power4)
11498 {
11499 /* Set 'a' bit. This is 0b00010 in BO field for branch
11500 on CR(BI) insns (BO == 001at or 011at), and 0b01000
11501 for branch on CTR insns (BO == 1a00t or 1a01t). */
11502 if ((insn & (0x14 << 21)) == (0x04 << 21))
11503 insn |= 0x02 << 21;
11504 else if ((insn & (0x14 << 21)) == (0x10 << 21))
11505 insn |= 0x08 << 21;
11506 else
11507 break;
11508 }
11509 else
11510 {
11511 /* Invert 'y' bit if not the default. */
11512 if ((bfd_signed_vma) (relocation + addend - from) < 0)
11513 insn ^= 0x01 << 21;
11514 }
11515
11516 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11517 }
11518
11519 /* NOP out calls to undefined weak functions.
11520 We can thus call a weak function without first
11521 checking whether the function is defined. */
11522 else if (h != NULL
11523 && h->elf.root.type == bfd_link_hash_undefweak
11524 && h->elf.dynindx == -1
11525 && r_type == R_PPC64_REL24
11526 && relocation == 0
11527 && addend == 0)
11528 {
11529 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11530 continue;
11531 }
11532 break;
11533 }
11534
11535 /* Set `addend'. */
11536 tls_type = 0;
11537 switch (r_type)
11538 {
11539 default:
11540 (*_bfd_error_handler)
11541 (_("%B: unknown relocation type %d for symbol %s"),
11542 input_bfd, (int) r_type, sym_name);
11543
11544 bfd_set_error (bfd_error_bad_value);
11545 ret = FALSE;
11546 continue;
11547
11548 case R_PPC64_NONE:
11549 case R_PPC64_TLS:
11550 case R_PPC64_TLSGD:
11551 case R_PPC64_TLSLD:
11552 case R_PPC64_GNU_VTINHERIT:
11553 case R_PPC64_GNU_VTENTRY:
11554 continue;
11555
11556 /* GOT16 relocations. Like an ADDR16 using the symbol's
11557 address in the GOT as relocation value instead of the
11558 symbol's value itself. Also, create a GOT entry for the
11559 symbol and put the symbol value there. */
11560 case R_PPC64_GOT_TLSGD16:
11561 case R_PPC64_GOT_TLSGD16_LO:
11562 case R_PPC64_GOT_TLSGD16_HI:
11563 case R_PPC64_GOT_TLSGD16_HA:
11564 tls_type = TLS_TLS | TLS_GD;
11565 goto dogot;
11566
11567 case R_PPC64_GOT_TLSLD16:
11568 case R_PPC64_GOT_TLSLD16_LO:
11569 case R_PPC64_GOT_TLSLD16_HI:
11570 case R_PPC64_GOT_TLSLD16_HA:
11571 tls_type = TLS_TLS | TLS_LD;
11572 goto dogot;
11573
11574 case R_PPC64_GOT_TPREL16_DS:
11575 case R_PPC64_GOT_TPREL16_LO_DS:
11576 case R_PPC64_GOT_TPREL16_HI:
11577 case R_PPC64_GOT_TPREL16_HA:
11578 tls_type = TLS_TLS | TLS_TPREL;
11579 goto dogot;
11580
11581 case R_PPC64_GOT_DTPREL16_DS:
11582 case R_PPC64_GOT_DTPREL16_LO_DS:
11583 case R_PPC64_GOT_DTPREL16_HI:
11584 case R_PPC64_GOT_DTPREL16_HA:
11585 tls_type = TLS_TLS | TLS_DTPREL;
11586 goto dogot;
11587
11588 case R_PPC64_GOT16:
11589 case R_PPC64_GOT16_LO:
11590 case R_PPC64_GOT16_HI:
11591 case R_PPC64_GOT16_HA:
11592 case R_PPC64_GOT16_DS:
11593 case R_PPC64_GOT16_LO_DS:
11594 dogot:
11595 {
11596 /* Relocation is to the entry for this symbol in the global
11597 offset table. */
11598 asection *got;
11599 bfd_vma *offp;
11600 bfd_vma off;
11601 unsigned long indx = 0;
11602
11603 if (tls_type == (TLS_TLS | TLS_LD)
11604 && (h == NULL
11605 || !h->elf.def_dynamic))
11606 offp = &ppc64_tlsld_got (input_bfd)->offset;
11607 else
11608 {
11609 struct got_entry *ent;
11610
11611 if (h != NULL)
11612 {
11613 bfd_boolean dyn = htab->elf.dynamic_sections_created;
11614 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
11615 &h->elf)
11616 || (info->shared
11617 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
11618 /* This is actually a static link, or it is a
11619 -Bsymbolic link and the symbol is defined
11620 locally, or the symbol was forced to be local
11621 because of a version file. */
11622 ;
11623 else
11624 {
11625 indx = h->elf.dynindx;
11626 unresolved_reloc = FALSE;
11627 }
11628 ent = h->elf.got.glist;
11629 }
11630 else
11631 {
11632 if (local_got_ents == NULL)
11633 abort ();
11634 ent = local_got_ents[r_symndx];
11635 }
11636
11637 for (; ent != NULL; ent = ent->next)
11638 if (ent->addend == orig_addend
11639 && ent->owner == input_bfd
11640 && ent->tls_type == tls_type)
11641 break;
11642 if (ent == NULL)
11643 abort ();
11644 offp = &ent->got.offset;
11645 }
11646
11647 got = ppc64_elf_tdata (input_bfd)->got;
11648 if (got == NULL)
11649 abort ();
11650
11651 /* The offset must always be a multiple of 8. We use the
11652 least significant bit to record whether we have already
11653 processed this entry. */
11654 off = *offp;
11655 if ((off & 1) != 0)
11656 off &= ~1;
11657 else
11658 {
11659 /* Generate relocs for the dynamic linker, except in
11660 the case of TLSLD where we'll use one entry per
11661 module. */
11662 asection *relgot;
11663 bfd_boolean ifunc;
11664
11665 *offp = off | 1;
11666 relgot = NULL;
11667 ifunc = (h != NULL
11668 ? h->elf.type == STT_GNU_IFUNC
11669 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
11670 if ((info->shared || indx != 0)
11671 && (offp == &ppc64_tlsld_got (input_bfd)->offset
11672 || h == NULL
11673 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11674 || h->elf.root.type != bfd_link_hash_undefweak))
11675 relgot = ppc64_elf_tdata (input_bfd)->relgot;
11676 else if (ifunc)
11677 relgot = htab->reliplt;
11678 if (relgot != NULL)
11679 {
11680 outrel.r_offset = (got->output_section->vma
11681 + got->output_offset
11682 + off);
11683 outrel.r_addend = addend;
11684 if (tls_type & (TLS_LD | TLS_GD))
11685 {
11686 outrel.r_addend = 0;
11687 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11688 if (tls_type == (TLS_TLS | TLS_GD))
11689 {
11690 loc = relgot->contents;
11691 loc += (relgot->reloc_count++
11692 * sizeof (Elf64_External_Rela));
11693 bfd_elf64_swap_reloca_out (output_bfd,
11694 &outrel, loc);
11695 outrel.r_offset += 8;
11696 outrel.r_addend = addend;
11697 outrel.r_info
11698 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11699 }
11700 }
11701 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11702 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11703 else if (tls_type == (TLS_TLS | TLS_TPREL))
11704 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11705 else if (indx != 0)
11706 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11707 else
11708 {
11709 if (ifunc)
11710 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11711 else
11712 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11713
11714 /* Write the .got section contents for the sake
11715 of prelink. */
11716 loc = got->contents + off;
11717 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11718 loc);
11719 }
11720
11721 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11722 {
11723 outrel.r_addend += relocation;
11724 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11725 outrel.r_addend -= htab->elf.tls_sec->vma;
11726 }
11727 loc = relgot->contents;
11728 loc += (relgot->reloc_count++
11729 * sizeof (Elf64_External_Rela));
11730 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11731 }
11732
11733 /* Init the .got section contents here if we're not
11734 emitting a reloc. */
11735 else
11736 {
11737 relocation += addend;
11738 if (tls_type == (TLS_TLS | TLS_LD))
11739 relocation = 1;
11740 else if (tls_type != 0)
11741 {
11742 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11743 if (tls_type == (TLS_TLS | TLS_TPREL))
11744 relocation += DTP_OFFSET - TP_OFFSET;
11745
11746 if (tls_type == (TLS_TLS | TLS_GD))
11747 {
11748 bfd_put_64 (output_bfd, relocation,
11749 got->contents + off + 8);
11750 relocation = 1;
11751 }
11752 }
11753
11754 bfd_put_64 (output_bfd, relocation,
11755 got->contents + off);
11756 }
11757 }
11758
11759 if (off >= (bfd_vma) -2)
11760 abort ();
11761
11762 relocation = got->output_section->vma + got->output_offset + off;
11763 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
11764 }
11765 break;
11766
11767 case R_PPC64_PLT16_HA:
11768 case R_PPC64_PLT16_HI:
11769 case R_PPC64_PLT16_LO:
11770 case R_PPC64_PLT32:
11771 case R_PPC64_PLT64:
11772 /* Relocation is to the entry for this symbol in the
11773 procedure linkage table. */
11774
11775 /* Resolve a PLT reloc against a local symbol directly,
11776 without using the procedure linkage table. */
11777 if (h == NULL)
11778 break;
11779
11780 /* It's possible that we didn't make a PLT entry for this
11781 symbol. This happens when statically linking PIC code,
11782 or when using -Bsymbolic. Go find a match if there is a
11783 PLT entry. */
11784 if (htab->plt != NULL)
11785 {
11786 struct plt_entry *ent;
11787 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11788 if (ent->addend == orig_addend
11789 && ent->plt.offset != (bfd_vma) -1)
11790 {
11791 relocation = (htab->plt->output_section->vma
11792 + htab->plt->output_offset
11793 + ent->plt.offset);
11794 unresolved_reloc = FALSE;
11795 }
11796 }
11797 break;
11798
11799 case R_PPC64_TOC:
11800 /* Relocation value is TOC base. */
11801 relocation = TOCstart;
11802 if (r_symndx == 0)
11803 relocation += htab->stub_group[input_section->id].toc_off;
11804 else if (unresolved_reloc)
11805 ;
11806 else if (sec != NULL && sec->id <= htab->top_id)
11807 relocation += htab->stub_group[sec->id].toc_off;
11808 else
11809 unresolved_reloc = TRUE;
11810 goto dodyn;
11811
11812 /* TOC16 relocs. We want the offset relative to the TOC base,
11813 which is the address of the start of the TOC plus 0x8000.
11814 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11815 in this order. */
11816 case R_PPC64_TOC16:
11817 case R_PPC64_TOC16_LO:
11818 case R_PPC64_TOC16_HI:
11819 case R_PPC64_TOC16_DS:
11820 case R_PPC64_TOC16_LO_DS:
11821 case R_PPC64_TOC16_HA:
11822 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11823 break;
11824
11825 /* Relocate against the beginning of the section. */
11826 case R_PPC64_SECTOFF:
11827 case R_PPC64_SECTOFF_LO:
11828 case R_PPC64_SECTOFF_HI:
11829 case R_PPC64_SECTOFF_DS:
11830 case R_PPC64_SECTOFF_LO_DS:
11831 case R_PPC64_SECTOFF_HA:
11832 if (sec != NULL)
11833 addend -= sec->output_section->vma;
11834 break;
11835
11836 case R_PPC64_REL16:
11837 case R_PPC64_REL16_LO:
11838 case R_PPC64_REL16_HI:
11839 case R_PPC64_REL16_HA:
11840 break;
11841
11842 case R_PPC64_REL14:
11843 case R_PPC64_REL14_BRNTAKEN:
11844 case R_PPC64_REL14_BRTAKEN:
11845 case R_PPC64_REL24:
11846 break;
11847
11848 case R_PPC64_TPREL16:
11849 case R_PPC64_TPREL16_LO:
11850 case R_PPC64_TPREL16_HI:
11851 case R_PPC64_TPREL16_HA:
11852 case R_PPC64_TPREL16_DS:
11853 case R_PPC64_TPREL16_LO_DS:
11854 case R_PPC64_TPREL16_HIGHER:
11855 case R_PPC64_TPREL16_HIGHERA:
11856 case R_PPC64_TPREL16_HIGHEST:
11857 case R_PPC64_TPREL16_HIGHESTA:
11858 if (h != NULL
11859 && h->elf.root.type == bfd_link_hash_undefweak
11860 && h->elf.dynindx == -1)
11861 {
11862 /* Make this relocation against an undefined weak symbol
11863 resolve to zero. This is really just a tweak, since
11864 code using weak externs ought to check that they are
11865 defined before using them. */
11866 bfd_byte *p = contents + rel->r_offset - d_offset;
11867
11868 insn = bfd_get_32 (output_bfd, p);
11869 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
11870 if (insn != 0)
11871 bfd_put_32 (output_bfd, insn, p);
11872 break;
11873 }
11874 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11875 if (info->shared)
11876 /* The TPREL16 relocs shouldn't really be used in shared
11877 libs as they will result in DT_TEXTREL being set, but
11878 support them anyway. */
11879 goto dodyn;
11880 break;
11881
11882 case R_PPC64_DTPREL16:
11883 case R_PPC64_DTPREL16_LO:
11884 case R_PPC64_DTPREL16_HI:
11885 case R_PPC64_DTPREL16_HA:
11886 case R_PPC64_DTPREL16_DS:
11887 case R_PPC64_DTPREL16_LO_DS:
11888 case R_PPC64_DTPREL16_HIGHER:
11889 case R_PPC64_DTPREL16_HIGHERA:
11890 case R_PPC64_DTPREL16_HIGHEST:
11891 case R_PPC64_DTPREL16_HIGHESTA:
11892 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11893 break;
11894
11895 case R_PPC64_DTPMOD64:
11896 relocation = 1;
11897 addend = 0;
11898 goto dodyn;
11899
11900 case R_PPC64_TPREL64:
11901 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11902 goto dodyn;
11903
11904 case R_PPC64_DTPREL64:
11905 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11906 /* Fall thru */
11907
11908 /* Relocations that may need to be propagated if this is a
11909 dynamic object. */
11910 case R_PPC64_REL30:
11911 case R_PPC64_REL32:
11912 case R_PPC64_REL64:
11913 case R_PPC64_ADDR14:
11914 case R_PPC64_ADDR14_BRNTAKEN:
11915 case R_PPC64_ADDR14_BRTAKEN:
11916 case R_PPC64_ADDR16:
11917 case R_PPC64_ADDR16_DS:
11918 case R_PPC64_ADDR16_HA:
11919 case R_PPC64_ADDR16_HI:
11920 case R_PPC64_ADDR16_HIGHER:
11921 case R_PPC64_ADDR16_HIGHERA:
11922 case R_PPC64_ADDR16_HIGHEST:
11923 case R_PPC64_ADDR16_HIGHESTA:
11924 case R_PPC64_ADDR16_LO:
11925 case R_PPC64_ADDR16_LO_DS:
11926 case R_PPC64_ADDR24:
11927 case R_PPC64_ADDR32:
11928 case R_PPC64_ADDR64:
11929 case R_PPC64_UADDR16:
11930 case R_PPC64_UADDR32:
11931 case R_PPC64_UADDR64:
11932 dodyn:
11933 if ((input_section->flags & SEC_ALLOC) == 0)
11934 break;
11935
11936 if (NO_OPD_RELOCS && is_opd)
11937 break;
11938
11939 if ((info->shared
11940 && (h == NULL
11941 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11942 || h->elf.root.type != bfd_link_hash_undefweak)
11943 && (must_be_dyn_reloc (info, r_type)
11944 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11945 || (ELIMINATE_COPY_RELOCS
11946 && !info->shared
11947 && h != NULL
11948 && h->elf.dynindx != -1
11949 && !h->elf.non_got_ref
11950 && !h->elf.def_regular)
11951 || (!info->shared
11952 && (h != NULL
11953 ? h->elf.type == STT_GNU_IFUNC
11954 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
11955 {
11956 bfd_boolean skip, relocate;
11957 asection *sreloc;
11958 bfd_vma out_off;
11959
11960 /* When generating a dynamic object, these relocations
11961 are copied into the output file to be resolved at run
11962 time. */
11963
11964 skip = FALSE;
11965 relocate = FALSE;
11966
11967 out_off = _bfd_elf_section_offset (output_bfd, info,
11968 input_section, rel->r_offset);
11969 if (out_off == (bfd_vma) -1)
11970 skip = TRUE;
11971 else if (out_off == (bfd_vma) -2)
11972 skip = TRUE, relocate = TRUE;
11973 out_off += (input_section->output_section->vma
11974 + input_section->output_offset);
11975 outrel.r_offset = out_off;
11976 outrel.r_addend = rel->r_addend;
11977
11978 /* Optimize unaligned reloc use. */
11979 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11980 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11981 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11982 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11983 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11984 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11985 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11986 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11987 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11988
11989 if (skip)
11990 memset (&outrel, 0, sizeof outrel);
11991 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11992 && !is_opd
11993 && r_type != R_PPC64_TOC)
11994 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11995 else
11996 {
11997 /* This symbol is local, or marked to become local,
11998 or this is an opd section reloc which must point
11999 at a local function. */
12000 outrel.r_addend += relocation;
12001 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
12002 {
12003 if (is_opd && h != NULL)
12004 {
12005 /* Lie about opd entries. This case occurs
12006 when building shared libraries and we
12007 reference a function in another shared
12008 lib. The same thing happens for a weak
12009 definition in an application that's
12010 overridden by a strong definition in a
12011 shared lib. (I believe this is a generic
12012 bug in binutils handling of weak syms.)
12013 In these cases we won't use the opd
12014 entry in this lib. */
12015 unresolved_reloc = FALSE;
12016 }
12017 if (!is_opd
12018 && r_type == R_PPC64_ADDR64
12019 && (h != NULL
12020 ? h->elf.type == STT_GNU_IFUNC
12021 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12022 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12023 else
12024 {
12025 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12026
12027 /* We need to relocate .opd contents for ld.so.
12028 Prelink also wants simple and consistent rules
12029 for relocs. This make all RELATIVE relocs have
12030 *r_offset equal to r_addend. */
12031 relocate = TRUE;
12032 }
12033 }
12034 else
12035 {
12036 long indx = 0;
12037
12038 if (h != NULL
12039 ? h->elf.type == STT_GNU_IFUNC
12040 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12041 {
12042 (*_bfd_error_handler)
12043 (_("%B(%A+0x%lx): relocation %s for indirect "
12044 "function %s unsupported"),
12045 input_bfd,
12046 input_section,
12047 (long) rel->r_offset,
12048 ppc64_elf_howto_table[r_type]->name,
12049 sym_name);
12050 ret = FALSE;
12051 }
12052 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12053 ;
12054 else if (sec == NULL || sec->owner == NULL)
12055 {
12056 bfd_set_error (bfd_error_bad_value);
12057 return FALSE;
12058 }
12059 else
12060 {
12061 asection *osec;
12062
12063 osec = sec->output_section;
12064 indx = elf_section_data (osec)->dynindx;
12065
12066 if (indx == 0)
12067 {
12068 if ((osec->flags & SEC_READONLY) == 0
12069 && htab->elf.data_index_section != NULL)
12070 osec = htab->elf.data_index_section;
12071 else
12072 osec = htab->elf.text_index_section;
12073 indx = elf_section_data (osec)->dynindx;
12074 }
12075 BFD_ASSERT (indx != 0);
12076
12077 /* We are turning this relocation into one
12078 against a section symbol, so subtract out
12079 the output section's address but not the
12080 offset of the input section in the output
12081 section. */
12082 outrel.r_addend -= osec->vma;
12083 }
12084
12085 outrel.r_info = ELF64_R_INFO (indx, r_type);
12086 }
12087 }
12088
12089 sreloc = elf_section_data (input_section)->sreloc;
12090 if (!htab->elf.dynamic_sections_created)
12091 sreloc = htab->reliplt;
12092 if (sreloc == NULL)
12093 abort ();
12094
12095 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12096 >= sreloc->size)
12097 abort ();
12098 loc = sreloc->contents;
12099 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12100 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12101
12102 /* If this reloc is against an external symbol, it will
12103 be computed at runtime, so there's no need to do
12104 anything now. However, for the sake of prelink ensure
12105 that the section contents are a known value. */
12106 if (! relocate)
12107 {
12108 unresolved_reloc = FALSE;
12109 /* The value chosen here is quite arbitrary as ld.so
12110 ignores section contents except for the special
12111 case of .opd where the contents might be accessed
12112 before relocation. Choose zero, as that won't
12113 cause reloc overflow. */
12114 relocation = 0;
12115 addend = 0;
12116 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12117 to improve backward compatibility with older
12118 versions of ld. */
12119 if (r_type == R_PPC64_ADDR64)
12120 addend = outrel.r_addend;
12121 /* Adjust pc_relative relocs to have zero in *r_offset. */
12122 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12123 addend = (input_section->output_section->vma
12124 + input_section->output_offset
12125 + rel->r_offset);
12126 }
12127 }
12128 break;
12129
12130 case R_PPC64_COPY:
12131 case R_PPC64_GLOB_DAT:
12132 case R_PPC64_JMP_SLOT:
12133 case R_PPC64_JMP_IREL:
12134 case R_PPC64_RELATIVE:
12135 /* We shouldn't ever see these dynamic relocs in relocatable
12136 files. */
12137 /* Fall through. */
12138
12139 case R_PPC64_PLTGOT16:
12140 case R_PPC64_PLTGOT16_DS:
12141 case R_PPC64_PLTGOT16_HA:
12142 case R_PPC64_PLTGOT16_HI:
12143 case R_PPC64_PLTGOT16_LO:
12144 case R_PPC64_PLTGOT16_LO_DS:
12145 case R_PPC64_PLTREL32:
12146 case R_PPC64_PLTREL64:
12147 /* These ones haven't been implemented yet. */
12148
12149 (*_bfd_error_handler)
12150 (_("%B: relocation %s is not supported for symbol %s."),
12151 input_bfd,
12152 ppc64_elf_howto_table[r_type]->name, sym_name);
12153
12154 bfd_set_error (bfd_error_invalid_operation);
12155 ret = FALSE;
12156 continue;
12157 }
12158
12159 /* Do any further special processing. */
12160 switch (r_type)
12161 {
12162 default:
12163 break;
12164
12165 case R_PPC64_ADDR16_HA:
12166 case R_PPC64_REL16_HA:
12167 case R_PPC64_ADDR16_HIGHERA:
12168 case R_PPC64_ADDR16_HIGHESTA:
12169 case R_PPC64_TOC16_HA:
12170 case R_PPC64_SECTOFF_HA:
12171 case R_PPC64_TPREL16_HA:
12172 case R_PPC64_DTPREL16_HA:
12173 case R_PPC64_TPREL16_HIGHER:
12174 case R_PPC64_TPREL16_HIGHERA:
12175 case R_PPC64_TPREL16_HIGHEST:
12176 case R_PPC64_TPREL16_HIGHESTA:
12177 case R_PPC64_DTPREL16_HIGHER:
12178 case R_PPC64_DTPREL16_HIGHERA:
12179 case R_PPC64_DTPREL16_HIGHEST:
12180 case R_PPC64_DTPREL16_HIGHESTA:
12181 /* It's just possible that this symbol is a weak symbol
12182 that's not actually defined anywhere. In that case,
12183 'sec' would be NULL, and we should leave the symbol
12184 alone (it will be set to zero elsewhere in the link). */
12185 if (sec == NULL)
12186 break;
12187 /* Fall thru */
12188
12189 case R_PPC64_GOT16_HA:
12190 case R_PPC64_PLTGOT16_HA:
12191 case R_PPC64_PLT16_HA:
12192 case R_PPC64_GOT_TLSGD16_HA:
12193 case R_PPC64_GOT_TLSLD16_HA:
12194 case R_PPC64_GOT_TPREL16_HA:
12195 case R_PPC64_GOT_DTPREL16_HA:
12196 /* Add 0x10000 if sign bit in 0:15 is set.
12197 Bits 0:15 are not used. */
12198 addend += 0x8000;
12199 break;
12200
12201 case R_PPC64_ADDR16_DS:
12202 case R_PPC64_ADDR16_LO_DS:
12203 case R_PPC64_GOT16_DS:
12204 case R_PPC64_GOT16_LO_DS:
12205 case R_PPC64_PLT16_LO_DS:
12206 case R_PPC64_SECTOFF_DS:
12207 case R_PPC64_SECTOFF_LO_DS:
12208 case R_PPC64_TOC16_DS:
12209 case R_PPC64_TOC16_LO_DS:
12210 case R_PPC64_PLTGOT16_DS:
12211 case R_PPC64_PLTGOT16_LO_DS:
12212 case R_PPC64_GOT_TPREL16_DS:
12213 case R_PPC64_GOT_TPREL16_LO_DS:
12214 case R_PPC64_GOT_DTPREL16_DS:
12215 case R_PPC64_GOT_DTPREL16_LO_DS:
12216 case R_PPC64_TPREL16_DS:
12217 case R_PPC64_TPREL16_LO_DS:
12218 case R_PPC64_DTPREL16_DS:
12219 case R_PPC64_DTPREL16_LO_DS:
12220 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12221 mask = 3;
12222 /* If this reloc is against an lq insn, then the value must be
12223 a multiple of 16. This is somewhat of a hack, but the
12224 "correct" way to do this by defining _DQ forms of all the
12225 _DS relocs bloats all reloc switches in this file. It
12226 doesn't seem to make much sense to use any of these relocs
12227 in data, so testing the insn should be safe. */
12228 if ((insn & (0x3f << 26)) == (56u << 26))
12229 mask = 15;
12230 if (((relocation + addend) & mask) != 0)
12231 {
12232 (*_bfd_error_handler)
12233 (_("%B: error: relocation %s not a multiple of %d"),
12234 input_bfd,
12235 ppc64_elf_howto_table[r_type]->name,
12236 mask + 1);
12237 bfd_set_error (bfd_error_bad_value);
12238 ret = FALSE;
12239 continue;
12240 }
12241 break;
12242 }
12243
12244 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12245 because such sections are not SEC_ALLOC and thus ld.so will
12246 not process them. */
12247 if (unresolved_reloc
12248 && !((input_section->flags & SEC_DEBUGGING) != 0
12249 && h->elf.def_dynamic))
12250 {
12251 (*_bfd_error_handler)
12252 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12253 input_bfd,
12254 input_section,
12255 (long) rel->r_offset,
12256 ppc64_elf_howto_table[(int) r_type]->name,
12257 h->elf.root.root.string);
12258 ret = FALSE;
12259 }
12260
12261 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12262 input_bfd,
12263 input_section,
12264 contents,
12265 rel->r_offset,
12266 relocation,
12267 addend);
12268
12269 if (r != bfd_reloc_ok)
12270 {
12271 if (sym_name == NULL)
12272 sym_name = "(null)";
12273 if (r == bfd_reloc_overflow)
12274 {
12275 if (warned)
12276 continue;
12277 if (h != NULL
12278 && h->elf.root.type == bfd_link_hash_undefweak
12279 && ppc64_elf_howto_table[r_type]->pc_relative)
12280 {
12281 /* Assume this is a call protected by other code that
12282 detects the symbol is undefined. If this is the case,
12283 we can safely ignore the overflow. If not, the
12284 program is hosed anyway, and a little warning isn't
12285 going to help. */
12286
12287 continue;
12288 }
12289
12290 if (!((*info->callbacks->reloc_overflow)
12291 (info, (h ? &h->elf.root : NULL), sym_name,
12292 ppc64_elf_howto_table[r_type]->name,
12293 orig_addend, input_bfd, input_section, rel->r_offset)))
12294 return FALSE;
12295 }
12296 else
12297 {
12298 (*_bfd_error_handler)
12299 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12300 input_bfd,
12301 input_section,
12302 (long) rel->r_offset,
12303 ppc64_elf_howto_table[r_type]->name,
12304 sym_name,
12305 (int) r);
12306 ret = FALSE;
12307 }
12308 }
12309 }
12310
12311 /* If we're emitting relocations, then shortly after this function
12312 returns, reloc offsets and addends for this section will be
12313 adjusted. Worse, reloc symbol indices will be for the output
12314 file rather than the input. Save a copy of the relocs for
12315 opd_entry_value. */
12316 if (is_opd && (info->emitrelocations || info->relocatable))
12317 {
12318 bfd_size_type amt;
12319 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12320 rel = bfd_alloc (input_bfd, amt);
12321 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12322 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12323 if (rel == NULL)
12324 return FALSE;
12325 memcpy (rel, relocs, amt);
12326 }
12327 return ret;
12328 }
12329
12330 /* Adjust the value of any local symbols in opd sections. */
12331
12332 static int
12333 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12334 const char *name ATTRIBUTE_UNUSED,
12335 Elf_Internal_Sym *elfsym,
12336 asection *input_sec,
12337 struct elf_link_hash_entry *h)
12338 {
12339 struct _opd_sec_data *opd;
12340 long adjust;
12341 bfd_vma value;
12342
12343 if (h != NULL)
12344 return 1;
12345
12346 opd = get_opd_info (input_sec);
12347 if (opd == NULL || opd->adjust == NULL)
12348 return 1;
12349
12350 value = elfsym->st_value - input_sec->output_offset;
12351 if (!info->relocatable)
12352 value -= input_sec->output_section->vma;
12353
12354 adjust = opd->adjust[value / 8];
12355 if (adjust == -1)
12356 return 2;
12357
12358 elfsym->st_value += adjust;
12359 return 1;
12360 }
12361
12362 /* Finish up dynamic symbol handling. We set the contents of various
12363 dynamic sections here. */
12364
12365 static bfd_boolean
12366 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
12367 struct bfd_link_info *info,
12368 struct elf_link_hash_entry *h,
12369 Elf_Internal_Sym *sym)
12370 {
12371 struct ppc_link_hash_table *htab;
12372 struct plt_entry *ent;
12373 Elf_Internal_Rela rela;
12374 bfd_byte *loc;
12375
12376 htab = ppc_hash_table (info);
12377
12378 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12379 if (ent->plt.offset != (bfd_vma) -1)
12380 {
12381 /* This symbol has an entry in the procedure linkage
12382 table. Set it up. */
12383 if (!htab->elf.dynamic_sections_created
12384 || h->dynindx == -1)
12385 {
12386 BFD_ASSERT (h->type == STT_GNU_IFUNC
12387 && h->def_regular
12388 && (h->root.type == bfd_link_hash_defined
12389 || h->root.type == bfd_link_hash_defweak));
12390 rela.r_offset = (htab->iplt->output_section->vma
12391 + htab->iplt->output_offset
12392 + ent->plt.offset);
12393 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12394 rela.r_addend = (h->root.u.def.value
12395 + h->root.u.def.section->output_offset
12396 + h->root.u.def.section->output_section->vma
12397 + ent->addend);
12398 loc = (htab->reliplt->contents
12399 + (htab->reliplt->reloc_count++
12400 * sizeof (Elf64_External_Rela)));
12401 }
12402 else
12403 {
12404 rela.r_offset = (htab->plt->output_section->vma
12405 + htab->plt->output_offset
12406 + ent->plt.offset);
12407 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12408 rela.r_addend = ent->addend;
12409 loc = (htab->relplt->contents
12410 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
12411 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
12412 }
12413 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12414 }
12415
12416 if (h->needs_copy)
12417 {
12418 /* This symbol needs a copy reloc. Set it up. */
12419
12420 if (h->dynindx == -1
12421 || (h->root.type != bfd_link_hash_defined
12422 && h->root.type != bfd_link_hash_defweak)
12423 || htab->relbss == NULL)
12424 abort ();
12425
12426 rela.r_offset = (h->root.u.def.value
12427 + h->root.u.def.section->output_section->vma
12428 + h->root.u.def.section->output_offset);
12429 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
12430 rela.r_addend = 0;
12431 loc = htab->relbss->contents;
12432 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
12433 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12434 }
12435
12436 /* Mark some specially defined symbols as absolute. */
12437 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
12438 sym->st_shndx = SHN_ABS;
12439
12440 return TRUE;
12441 }
12442
12443 /* Used to decide how to sort relocs in an optimal manner for the
12444 dynamic linker, before writing them out. */
12445
12446 static enum elf_reloc_type_class
12447 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
12448 {
12449 enum elf_ppc64_reloc_type r_type;
12450
12451 r_type = ELF64_R_TYPE (rela->r_info);
12452 switch (r_type)
12453 {
12454 case R_PPC64_RELATIVE:
12455 return reloc_class_relative;
12456 case R_PPC64_JMP_SLOT:
12457 return reloc_class_plt;
12458 case R_PPC64_COPY:
12459 return reloc_class_copy;
12460 default:
12461 return reloc_class_normal;
12462 }
12463 }
12464
12465 /* Finish up the dynamic sections. */
12466
12467 static bfd_boolean
12468 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
12469 struct bfd_link_info *info)
12470 {
12471 struct ppc_link_hash_table *htab;
12472 bfd *dynobj;
12473 asection *sdyn;
12474
12475 htab = ppc_hash_table (info);
12476 dynobj = htab->elf.dynobj;
12477 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
12478
12479 if (htab->elf.dynamic_sections_created)
12480 {
12481 Elf64_External_Dyn *dyncon, *dynconend;
12482
12483 if (sdyn == NULL || htab->got == NULL)
12484 abort ();
12485
12486 dyncon = (Elf64_External_Dyn *) sdyn->contents;
12487 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
12488 for (; dyncon < dynconend; dyncon++)
12489 {
12490 Elf_Internal_Dyn dyn;
12491 asection *s;
12492
12493 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
12494
12495 switch (dyn.d_tag)
12496 {
12497 default:
12498 continue;
12499
12500 case DT_PPC64_GLINK:
12501 s = htab->glink;
12502 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12503 /* We stupidly defined DT_PPC64_GLINK to be the start
12504 of glink rather than the first entry point, which is
12505 what ld.so needs, and now have a bigger stub to
12506 support automatic multiple TOCs. */
12507 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
12508 break;
12509
12510 case DT_PPC64_OPD:
12511 s = bfd_get_section_by_name (output_bfd, ".opd");
12512 if (s == NULL)
12513 continue;
12514 dyn.d_un.d_ptr = s->vma;
12515 break;
12516
12517 case DT_PPC64_OPDSZ:
12518 s = bfd_get_section_by_name (output_bfd, ".opd");
12519 if (s == NULL)
12520 continue;
12521 dyn.d_un.d_val = s->size;
12522 break;
12523
12524 case DT_PLTGOT:
12525 s = htab->plt;
12526 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12527 break;
12528
12529 case DT_JMPREL:
12530 s = htab->relplt;
12531 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12532 break;
12533
12534 case DT_PLTRELSZ:
12535 dyn.d_un.d_val = htab->relplt->size;
12536 break;
12537
12538 case DT_RELASZ:
12539 /* Don't count procedure linkage table relocs in the
12540 overall reloc count. */
12541 s = htab->relplt;
12542 if (s == NULL)
12543 continue;
12544 dyn.d_un.d_val -= s->size;
12545 break;
12546
12547 case DT_RELA:
12548 /* We may not be using the standard ELF linker script.
12549 If .rela.plt is the first .rela section, we adjust
12550 DT_RELA to not include it. */
12551 s = htab->relplt;
12552 if (s == NULL)
12553 continue;
12554 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
12555 continue;
12556 dyn.d_un.d_ptr += s->size;
12557 break;
12558 }
12559
12560 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
12561 }
12562 }
12563
12564 if (htab->got != NULL && htab->got->size != 0)
12565 {
12566 /* Fill in the first entry in the global offset table.
12567 We use it to hold the link-time TOCbase. */
12568 bfd_put_64 (output_bfd,
12569 elf_gp (output_bfd) + TOC_BASE_OFF,
12570 htab->got->contents);
12571
12572 /* Set .got entry size. */
12573 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
12574 }
12575
12576 if (htab->plt != NULL && htab->plt->size != 0)
12577 {
12578 /* Set .plt entry size. */
12579 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
12580 = PLT_ENTRY_SIZE;
12581 }
12582
12583 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
12584 brlt ourselves if emitrelocations. */
12585 if (htab->brlt != NULL
12586 && htab->brlt->reloc_count != 0
12587 && !_bfd_elf_link_output_relocs (output_bfd,
12588 htab->brlt,
12589 &elf_section_data (htab->brlt)->rel_hdr,
12590 elf_section_data (htab->brlt)->relocs,
12591 NULL))
12592 return FALSE;
12593
12594 if (htab->glink != NULL
12595 && htab->glink->reloc_count != 0
12596 && !_bfd_elf_link_output_relocs (output_bfd,
12597 htab->glink,
12598 &elf_section_data (htab->glink)->rel_hdr,
12599 elf_section_data (htab->glink)->relocs,
12600 NULL))
12601 return FALSE;
12602
12603 /* We need to handle writing out multiple GOT sections ourselves,
12604 since we didn't add them to DYNOBJ. We know dynobj is the first
12605 bfd. */
12606 while ((dynobj = dynobj->link_next) != NULL)
12607 {
12608 asection *s;
12609
12610 if (!is_ppc64_elf (dynobj))
12611 continue;
12612
12613 s = ppc64_elf_tdata (dynobj)->got;
12614 if (s != NULL
12615 && s->size != 0
12616 && s->output_section != bfd_abs_section_ptr
12617 && !bfd_set_section_contents (output_bfd, s->output_section,
12618 s->contents, s->output_offset,
12619 s->size))
12620 return FALSE;
12621 s = ppc64_elf_tdata (dynobj)->relgot;
12622 if (s != NULL
12623 && s->size != 0
12624 && s->output_section != bfd_abs_section_ptr
12625 && !bfd_set_section_contents (output_bfd, s->output_section,
12626 s->contents, s->output_offset,
12627 s->size))
12628 return FALSE;
12629 }
12630
12631 return TRUE;
12632 }
12633
12634 #include "elf64-target.h"
GDB Binutils - Deliverables
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