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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
3736 /* Highest input section id. */
3737 int top_id;
3738
3739 /* Highest output section index. */
3740 int top_index;
3741
3742 /* Used when adding symbols. */
3743 struct ppc_link_hash_entry *dot_syms;
3744
3745 /* List of input sections for each output section. */
3746 asection **input_list;
3747
3748 /* Short-cuts to get to dynamic linker sections. */
3749 asection *got;
3750 asection *plt;
3751 asection *relplt;
3752 asection *iplt;
3753 asection *reliplt;
3754 asection *dynbss;
3755 asection *relbss;
3756 asection *glink;
3757 asection *sfpr;
3758 asection *brlt;
3759 asection *relbrlt;
3760
3761 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3762 struct ppc_link_hash_entry *tls_get_addr;
3763 struct ppc_link_hash_entry *tls_get_addr_fd;
3764
3765 /* Statistics. */
3766 unsigned long stub_count[ppc_stub_plt_call];
3767
3768 /* Number of stubs against global syms. */
3769 unsigned long stub_globals;
3770
3771 /* Set if we should emit symbols for stubs. */
3772 unsigned int emit_stub_syms:1;
3773
3774 /* Set if __tls_get_addr optimization should not be done. */
3775 unsigned int no_tls_get_addr_opt:1;
3776
3777 /* Support for multiple toc sections. */
3778 unsigned int no_multi_toc:1;
3779 unsigned int multi_toc_needed:1;
3780
3781 /* Set on error. */
3782 unsigned int stub_error:1;
3783
3784 /* Temp used by ppc64_elf_process_dot_syms. */
3785 unsigned int twiddled_syms:1;
3786
3787 /* Incremented every time we size stubs. */
3788 unsigned int stub_iteration;
3789
3790 /* Small local sym cache. */
3791 struct sym_cache sym_cache;
3792 };
3793
3794 /* Rename some of the generic section flags to better document how they
3795 are used here. */
3796 #define has_toc_reloc has_gp_reloc
3797 #define makes_toc_func_call need_finalize_relax
3798 #define call_check_in_progress reloc_done
3799
3800 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3801
3802 #define ppc_hash_table(p) \
3803 ((struct ppc_link_hash_table *) ((p)->hash))
3804
3805 #define ppc_stub_hash_lookup(table, string, create, copy) \
3806 ((struct ppc_stub_hash_entry *) \
3807 bfd_hash_lookup ((table), (string), (create), (copy)))
3808
3809 #define ppc_branch_hash_lookup(table, string, create, copy) \
3810 ((struct ppc_branch_hash_entry *) \
3811 bfd_hash_lookup ((table), (string), (create), (copy)))
3812
3813 /* Create an entry in the stub hash table. */
3814
3815 static struct bfd_hash_entry *
3816 stub_hash_newfunc (struct bfd_hash_entry *entry,
3817 struct bfd_hash_table *table,
3818 const char *string)
3819 {
3820 /* Allocate the structure if it has not already been allocated by a
3821 subclass. */
3822 if (entry == NULL)
3823 {
3824 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3825 if (entry == NULL)
3826 return entry;
3827 }
3828
3829 /* Call the allocation method of the superclass. */
3830 entry = bfd_hash_newfunc (entry, table, string);
3831 if (entry != NULL)
3832 {
3833 struct ppc_stub_hash_entry *eh;
3834
3835 /* Initialize the local fields. */
3836 eh = (struct ppc_stub_hash_entry *) entry;
3837 eh->stub_type = ppc_stub_none;
3838 eh->stub_sec = NULL;
3839 eh->stub_offset = 0;
3840 eh->target_value = 0;
3841 eh->target_section = NULL;
3842 eh->h = NULL;
3843 eh->id_sec = NULL;
3844 }
3845
3846 return entry;
3847 }
3848
3849 /* Create an entry in the branch hash table. */
3850
3851 static struct bfd_hash_entry *
3852 branch_hash_newfunc (struct bfd_hash_entry *entry,
3853 struct bfd_hash_table *table,
3854 const char *string)
3855 {
3856 /* Allocate the structure if it has not already been allocated by a
3857 subclass. */
3858 if (entry == NULL)
3859 {
3860 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3861 if (entry == NULL)
3862 return entry;
3863 }
3864
3865 /* Call the allocation method of the superclass. */
3866 entry = bfd_hash_newfunc (entry, table, string);
3867 if (entry != NULL)
3868 {
3869 struct ppc_branch_hash_entry *eh;
3870
3871 /* Initialize the local fields. */
3872 eh = (struct ppc_branch_hash_entry *) entry;
3873 eh->offset = 0;
3874 eh->iter = 0;
3875 }
3876
3877 return entry;
3878 }
3879
3880 /* Create an entry in a ppc64 ELF linker hash table. */
3881
3882 static struct bfd_hash_entry *
3883 link_hash_newfunc (struct bfd_hash_entry *entry,
3884 struct bfd_hash_table *table,
3885 const char *string)
3886 {
3887 /* Allocate the structure if it has not already been allocated by a
3888 subclass. */
3889 if (entry == NULL)
3890 {
3891 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3892 if (entry == NULL)
3893 return entry;
3894 }
3895
3896 /* Call the allocation method of the superclass. */
3897 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3898 if (entry != NULL)
3899 {
3900 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3901
3902 memset (&eh->u.stub_cache, 0,
3903 (sizeof (struct ppc_link_hash_entry)
3904 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3905
3906 /* When making function calls, old ABI code references function entry
3907 points (dot symbols), while new ABI code references the function
3908 descriptor symbol. We need to make any combination of reference and
3909 definition work together, without breaking archive linking.
3910
3911 For a defined function "foo" and an undefined call to "bar":
3912 An old object defines "foo" and ".foo", references ".bar" (possibly
3913 "bar" too).
3914 A new object defines "foo" and references "bar".
3915
3916 A new object thus has no problem with its undefined symbols being
3917 satisfied by definitions in an old object. On the other hand, the
3918 old object won't have ".bar" satisfied by a new object.
3919
3920 Keep a list of newly added dot-symbols. */
3921
3922 if (string[0] == '.')
3923 {
3924 struct ppc_link_hash_table *htab;
3925
3926 htab = (struct ppc_link_hash_table *) table;
3927 eh->u.next_dot_sym = htab->dot_syms;
3928 htab->dot_syms = eh;
3929 }
3930 }
3931
3932 return entry;
3933 }
3934
3935 /* Create a ppc64 ELF linker hash table. */
3936
3937 static struct bfd_link_hash_table *
3938 ppc64_elf_link_hash_table_create (bfd *abfd)
3939 {
3940 struct ppc_link_hash_table *htab;
3941 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3942
3943 htab = bfd_zmalloc (amt);
3944 if (htab == NULL)
3945 return NULL;
3946
3947 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3948 sizeof (struct ppc_link_hash_entry)))
3949 {
3950 free (htab);
3951 return NULL;
3952 }
3953
3954 /* Init the stub hash table too. */
3955 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3956 sizeof (struct ppc_stub_hash_entry)))
3957 return NULL;
3958
3959 /* And the branch hash table. */
3960 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3961 sizeof (struct ppc_branch_hash_entry)))
3962 return NULL;
3963
3964 /* Initializing two fields of the union is just cosmetic. We really
3965 only care about glist, but when compiled on a 32-bit host the
3966 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3967 debugger inspection of these fields look nicer. */
3968 htab->elf.init_got_refcount.refcount = 0;
3969 htab->elf.init_got_refcount.glist = NULL;
3970 htab->elf.init_plt_refcount.refcount = 0;
3971 htab->elf.init_plt_refcount.glist = NULL;
3972 htab->elf.init_got_offset.offset = 0;
3973 htab->elf.init_got_offset.glist = NULL;
3974 htab->elf.init_plt_offset.offset = 0;
3975 htab->elf.init_plt_offset.glist = NULL;
3976
3977 return &htab->elf.root;
3978 }
3979
3980 /* Free the derived linker hash table. */
3981
3982 static void
3983 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3984 {
3985 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3986
3987 bfd_hash_table_free (&ret->stub_hash_table);
3988 bfd_hash_table_free (&ret->branch_hash_table);
3989 _bfd_generic_link_hash_table_free (hash);
3990 }
3991
3992 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3993
3994 void
3995 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3996 {
3997 struct ppc_link_hash_table *htab;
3998
3999 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
4000
4001 /* Always hook our dynamic sections into the first bfd, which is the
4002 linker created stub bfd. This ensures that the GOT header is at
4003 the start of the output TOC section. */
4004 htab = ppc_hash_table (info);
4005 htab->stub_bfd = abfd;
4006 htab->elf.dynobj = abfd;
4007 }
4008
4009 /* Build a name for an entry in the stub hash table. */
4010
4011 static char *
4012 ppc_stub_name (const asection *input_section,
4013 const asection *sym_sec,
4014 const struct ppc_link_hash_entry *h,
4015 const Elf_Internal_Rela *rel)
4016 {
4017 char *stub_name;
4018 bfd_size_type len;
4019
4020 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4021 offsets from a sym as a branch target? In fact, we could
4022 probably assume the addend is always zero. */
4023 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4024
4025 if (h)
4026 {
4027 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4028 stub_name = bfd_malloc (len);
4029 if (stub_name == NULL)
4030 return stub_name;
4031
4032 sprintf (stub_name, "%08x.%s+%x",
4033 input_section->id & 0xffffffff,
4034 h->elf.root.root.string,
4035 (int) rel->r_addend & 0xffffffff);
4036 }
4037 else
4038 {
4039 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4040 stub_name = bfd_malloc (len);
4041 if (stub_name == NULL)
4042 return stub_name;
4043
4044 sprintf (stub_name, "%08x.%x:%x+%x",
4045 input_section->id & 0xffffffff,
4046 sym_sec->id & 0xffffffff,
4047 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4048 (int) rel->r_addend & 0xffffffff);
4049 }
4050 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4051 stub_name[len - 2] = 0;
4052 return stub_name;
4053 }
4054
4055 /* Look up an entry in the stub hash. Stub entries are cached because
4056 creating the stub name takes a bit of time. */
4057
4058 static struct ppc_stub_hash_entry *
4059 ppc_get_stub_entry (const asection *input_section,
4060 const asection *sym_sec,
4061 struct ppc_link_hash_entry *h,
4062 const Elf_Internal_Rela *rel,
4063 struct ppc_link_hash_table *htab)
4064 {
4065 struct ppc_stub_hash_entry *stub_entry;
4066 const asection *id_sec;
4067
4068 /* If this input section is part of a group of sections sharing one
4069 stub section, then use the id of the first section in the group.
4070 Stub names need to include a section id, as there may well be
4071 more than one stub used to reach say, printf, and we need to
4072 distinguish between them. */
4073 id_sec = htab->stub_group[input_section->id].link_sec;
4074
4075 if (h != NULL && h->u.stub_cache != NULL
4076 && h->u.stub_cache->h == h
4077 && h->u.stub_cache->id_sec == id_sec)
4078 {
4079 stub_entry = h->u.stub_cache;
4080 }
4081 else
4082 {
4083 char *stub_name;
4084
4085 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4086 if (stub_name == NULL)
4087 return NULL;
4088
4089 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4090 stub_name, FALSE, FALSE);
4091 if (h != NULL)
4092 h->u.stub_cache = stub_entry;
4093
4094 free (stub_name);
4095 }
4096
4097 return stub_entry;
4098 }
4099
4100 /* Add a new stub entry to the stub hash. Not all fields of the new
4101 stub entry are initialised. */
4102
4103 static struct ppc_stub_hash_entry *
4104 ppc_add_stub (const char *stub_name,
4105 asection *section,
4106 struct ppc_link_hash_table *htab)
4107 {
4108 asection *link_sec;
4109 asection *stub_sec;
4110 struct ppc_stub_hash_entry *stub_entry;
4111
4112 link_sec = htab->stub_group[section->id].link_sec;
4113 stub_sec = htab->stub_group[section->id].stub_sec;
4114 if (stub_sec == NULL)
4115 {
4116 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4117 if (stub_sec == NULL)
4118 {
4119 size_t namelen;
4120 bfd_size_type len;
4121 char *s_name;
4122
4123 namelen = strlen (link_sec->name);
4124 len = namelen + sizeof (STUB_SUFFIX);
4125 s_name = bfd_alloc (htab->stub_bfd, len);
4126 if (s_name == NULL)
4127 return NULL;
4128
4129 memcpy (s_name, link_sec->name, namelen);
4130 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4131 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4132 if (stub_sec == NULL)
4133 return NULL;
4134 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4135 }
4136 htab->stub_group[section->id].stub_sec = stub_sec;
4137 }
4138
4139 /* Enter this entry into the linker stub hash table. */
4140 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4141 TRUE, FALSE);
4142 if (stub_entry == NULL)
4143 {
4144 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4145 section->owner, stub_name);
4146 return NULL;
4147 }
4148
4149 stub_entry->stub_sec = stub_sec;
4150 stub_entry->stub_offset = 0;
4151 stub_entry->id_sec = link_sec;
4152 return stub_entry;
4153 }
4154
4155 /* Create sections for linker generated code. */
4156
4157 static bfd_boolean
4158 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4159 {
4160 struct ppc_link_hash_table *htab;
4161 flagword flags;
4162
4163 htab = ppc_hash_table (info);
4164
4165 /* Create .sfpr for code to save and restore fp regs. */
4166 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4167 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4168 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4169 flags);
4170 if (htab->sfpr == NULL
4171 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4172 return FALSE;
4173
4174 /* Create .glink for lazy dynamic linking support. */
4175 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4176 flags);
4177 if (htab->glink == NULL
4178 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4179 return FALSE;
4180
4181 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4182 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4183 if (htab->iplt == NULL
4184 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4185 return FALSE;
4186
4187 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4188 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4189 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4190 ".rela.iplt",
4191 flags);
4192 if (htab->reliplt == NULL
4193 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4194 return FALSE;
4195
4196 /* Create branch lookup table for plt_branch stubs. */
4197 flags = (SEC_ALLOC | SEC_LOAD
4198 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4199 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4200 flags);
4201 if (htab->brlt == NULL
4202 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4203 return FALSE;
4204
4205 if (!info->shared)
4206 return TRUE;
4207
4208 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4209 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4210 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4211 ".rela.branch_lt",
4212 flags);
4213 if (htab->relbrlt == NULL
4214 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4215 return FALSE;
4216
4217 return TRUE;
4218 }
4219
4220 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4221 not already done. */
4222
4223 static bfd_boolean
4224 create_got_section (bfd *abfd, struct bfd_link_info *info)
4225 {
4226 asection *got, *relgot;
4227 flagword flags;
4228 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4229
4230 if (!is_ppc64_elf (abfd))
4231 return FALSE;
4232
4233 if (!htab->got)
4234 {
4235 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4236 return FALSE;
4237
4238 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4239 if (!htab->got)
4240 abort ();
4241 }
4242
4243 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4244 | SEC_LINKER_CREATED);
4245
4246 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4247 if (!got
4248 || !bfd_set_section_alignment (abfd, got, 3))
4249 return FALSE;
4250
4251 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4252 flags | SEC_READONLY);
4253 if (!relgot
4254 || ! bfd_set_section_alignment (abfd, relgot, 3))
4255 return FALSE;
4256
4257 ppc64_elf_tdata (abfd)->got = got;
4258 ppc64_elf_tdata (abfd)->relgot = relgot;
4259 return TRUE;
4260 }
4261
4262 /* Create the dynamic sections, and set up shortcuts. */
4263
4264 static bfd_boolean
4265 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4266 {
4267 struct ppc_link_hash_table *htab;
4268
4269 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4270 return FALSE;
4271
4272 htab = ppc_hash_table (info);
4273 if (!htab->got)
4274 htab->got = bfd_get_section_by_name (dynobj, ".got");
4275 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4276 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4277 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4278 if (!info->shared)
4279 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4280
4281 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4282 || (!info->shared && !htab->relbss))
4283 abort ();
4284
4285 return TRUE;
4286 }
4287
4288 /* Follow indirect and warning symbol links. */
4289
4290 static inline struct bfd_link_hash_entry *
4291 follow_link (struct bfd_link_hash_entry *h)
4292 {
4293 while (h->type == bfd_link_hash_indirect
4294 || h->type == bfd_link_hash_warning)
4295 h = h->u.i.link;
4296 return h;
4297 }
4298
4299 static inline struct elf_link_hash_entry *
4300 elf_follow_link (struct elf_link_hash_entry *h)
4301 {
4302 return (struct elf_link_hash_entry *) follow_link (&h->root);
4303 }
4304
4305 static inline struct ppc_link_hash_entry *
4306 ppc_follow_link (struct ppc_link_hash_entry *h)
4307 {
4308 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4309 }
4310
4311 /* Merge PLT info on FROM with that on TO. */
4312
4313 static void
4314 move_plt_plist (struct ppc_link_hash_entry *from,
4315 struct ppc_link_hash_entry *to)
4316 {
4317 if (from->elf.plt.plist != NULL)
4318 {
4319 if (to->elf.plt.plist != NULL)
4320 {
4321 struct plt_entry **entp;
4322 struct plt_entry *ent;
4323
4324 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4325 {
4326 struct plt_entry *dent;
4327
4328 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4329 if (dent->addend == ent->addend)
4330 {
4331 dent->plt.refcount += ent->plt.refcount;
4332 *entp = ent->next;
4333 break;
4334 }
4335 if (dent == NULL)
4336 entp = &ent->next;
4337 }
4338 *entp = to->elf.plt.plist;
4339 }
4340
4341 to->elf.plt.plist = from->elf.plt.plist;
4342 from->elf.plt.plist = NULL;
4343 }
4344 }
4345
4346 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4347
4348 static void
4349 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4350 struct elf_link_hash_entry *dir,
4351 struct elf_link_hash_entry *ind)
4352 {
4353 struct ppc_link_hash_entry *edir, *eind;
4354
4355 edir = (struct ppc_link_hash_entry *) dir;
4356 eind = (struct ppc_link_hash_entry *) ind;
4357
4358 /* Copy over any dynamic relocs we may have on the indirect sym. */
4359 if (eind->dyn_relocs != NULL)
4360 {
4361 if (edir->dyn_relocs != NULL)
4362 {
4363 struct ppc_dyn_relocs **pp;
4364 struct ppc_dyn_relocs *p;
4365
4366 /* Add reloc counts against the indirect sym to the direct sym
4367 list. Merge any entries against the same section. */
4368 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4369 {
4370 struct ppc_dyn_relocs *q;
4371
4372 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4373 if (q->sec == p->sec)
4374 {
4375 q->pc_count += p->pc_count;
4376 q->count += p->count;
4377 *pp = p->next;
4378 break;
4379 }
4380 if (q == NULL)
4381 pp = &p->next;
4382 }
4383 *pp = edir->dyn_relocs;
4384 }
4385
4386 edir->dyn_relocs = eind->dyn_relocs;
4387 eind->dyn_relocs = NULL;
4388 }
4389
4390 edir->is_func |= eind->is_func;
4391 edir->is_func_descriptor |= eind->is_func_descriptor;
4392 edir->tls_mask |= eind->tls_mask;
4393 if (eind->oh != NULL)
4394 edir->oh = ppc_follow_link (eind->oh);
4395
4396 /* If called to transfer flags for a weakdef during processing
4397 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4398 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4399 if (!(ELIMINATE_COPY_RELOCS
4400 && eind->elf.root.type != bfd_link_hash_indirect
4401 && edir->elf.dynamic_adjusted))
4402 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4403
4404 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4405 edir->elf.ref_regular |= eind->elf.ref_regular;
4406 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4407 edir->elf.needs_plt |= eind->elf.needs_plt;
4408
4409 /* If we were called to copy over info for a weak sym, that's all. */
4410 if (eind->elf.root.type != bfd_link_hash_indirect)
4411 return;
4412
4413 /* Copy over got entries that we may have already seen to the
4414 symbol which just became indirect. */
4415 if (eind->elf.got.glist != NULL)
4416 {
4417 if (edir->elf.got.glist != NULL)
4418 {
4419 struct got_entry **entp;
4420 struct got_entry *ent;
4421
4422 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4423 {
4424 struct got_entry *dent;
4425
4426 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4427 if (dent->addend == ent->addend
4428 && dent->owner == ent->owner
4429 && dent->tls_type == ent->tls_type)
4430 {
4431 dent->got.refcount += ent->got.refcount;
4432 *entp = ent->next;
4433 break;
4434 }
4435 if (dent == NULL)
4436 entp = &ent->next;
4437 }
4438 *entp = edir->elf.got.glist;
4439 }
4440
4441 edir->elf.got.glist = eind->elf.got.glist;
4442 eind->elf.got.glist = NULL;
4443 }
4444
4445 /* And plt entries. */
4446 move_plt_plist (eind, edir);
4447
4448 if (eind->elf.dynindx != -1)
4449 {
4450 if (edir->elf.dynindx != -1)
4451 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4452 edir->elf.dynstr_index);
4453 edir->elf.dynindx = eind->elf.dynindx;
4454 edir->elf.dynstr_index = eind->elf.dynstr_index;
4455 eind->elf.dynindx = -1;
4456 eind->elf.dynstr_index = 0;
4457 }
4458 }
4459
4460 /* Find the function descriptor hash entry from the given function code
4461 hash entry FH. Link the entries via their OH fields. */
4462
4463 static struct ppc_link_hash_entry *
4464 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4465 {
4466 struct ppc_link_hash_entry *fdh = fh->oh;
4467
4468 if (fdh == NULL)
4469 {
4470 const char *fd_name = fh->elf.root.root.string + 1;
4471
4472 fdh = (struct ppc_link_hash_entry *)
4473 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4474 if (fdh == NULL)
4475 return fdh;
4476
4477 fdh->is_func_descriptor = 1;
4478 fdh->oh = fh;
4479 fh->is_func = 1;
4480 fh->oh = fdh;
4481 }
4482
4483 return ppc_follow_link (fdh);
4484 }
4485
4486 /* Make a fake function descriptor sym for the code sym FH. */
4487
4488 static struct ppc_link_hash_entry *
4489 make_fdh (struct bfd_link_info *info,
4490 struct ppc_link_hash_entry *fh)
4491 {
4492 bfd *abfd;
4493 asymbol *newsym;
4494 struct bfd_link_hash_entry *bh;
4495 struct ppc_link_hash_entry *fdh;
4496
4497 abfd = fh->elf.root.u.undef.abfd;
4498 newsym = bfd_make_empty_symbol (abfd);
4499 newsym->name = fh->elf.root.root.string + 1;
4500 newsym->section = bfd_und_section_ptr;
4501 newsym->value = 0;
4502 newsym->flags = BSF_WEAK;
4503
4504 bh = NULL;
4505 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4506 newsym->flags, newsym->section,
4507 newsym->value, NULL, FALSE, FALSE,
4508 &bh))
4509 return NULL;
4510
4511 fdh = (struct ppc_link_hash_entry *) bh;
4512 fdh->elf.non_elf = 0;
4513 fdh->fake = 1;
4514 fdh->is_func_descriptor = 1;
4515 fdh->oh = fh;
4516 fh->is_func = 1;
4517 fh->oh = fdh;
4518 return fdh;
4519 }
4520
4521 /* Fix function descriptor symbols defined in .opd sections to be
4522 function type. */
4523
4524 static bfd_boolean
4525 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4526 struct bfd_link_info *info,
4527 Elf_Internal_Sym *isym,
4528 const char **name ATTRIBUTE_UNUSED,
4529 flagword *flags ATTRIBUTE_UNUSED,
4530 asection **sec,
4531 bfd_vma *value ATTRIBUTE_UNUSED)
4532 {
4533 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4534 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4535 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4536 ;
4537 else if (*sec != NULL
4538 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4539 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4540
4541 return TRUE;
4542 }
4543
4544 /* This function makes an old ABI object reference to ".bar" cause the
4545 inclusion of a new ABI object archive that defines "bar".
4546 NAME is a symbol defined in an archive. Return a symbol in the hash
4547 table that might be satisfied by the archive symbols. */
4548
4549 static struct elf_link_hash_entry *
4550 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4551 struct bfd_link_info *info,
4552 const char *name)
4553 {
4554 struct elf_link_hash_entry *h;
4555 char *dot_name;
4556 size_t len;
4557
4558 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4559 if (h != NULL
4560 /* Don't return this sym if it is a fake function descriptor
4561 created by add_symbol_adjust. */
4562 && !(h->root.type == bfd_link_hash_undefweak
4563 && ((struct ppc_link_hash_entry *) h)->fake))
4564 return h;
4565
4566 if (name[0] == '.')
4567 return h;
4568
4569 len = strlen (name);
4570 dot_name = bfd_alloc (abfd, len + 2);
4571 if (dot_name == NULL)
4572 return (struct elf_link_hash_entry *) 0 - 1;
4573 dot_name[0] = '.';
4574 memcpy (dot_name + 1, name, len + 1);
4575 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4576 bfd_release (abfd, dot_name);
4577 return h;
4578 }
4579
4580 /* This function satisfies all old ABI object references to ".bar" if a
4581 new ABI object defines "bar". Well, at least, undefined dot symbols
4582 are made weak. This stops later archive searches from including an
4583 object if we already have a function descriptor definition. It also
4584 prevents the linker complaining about undefined symbols.
4585 We also check and correct mismatched symbol visibility here. The
4586 most restrictive visibility of the function descriptor and the
4587 function entry symbol is used. */
4588
4589 static bfd_boolean
4590 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4591 {
4592 struct ppc_link_hash_table *htab;
4593 struct ppc_link_hash_entry *fdh;
4594
4595 if (eh->elf.root.type == bfd_link_hash_indirect)
4596 return TRUE;
4597
4598 if (eh->elf.root.type == bfd_link_hash_warning)
4599 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4600
4601 if (eh->elf.root.root.string[0] != '.')
4602 abort ();
4603
4604 htab = ppc_hash_table (info);
4605 fdh = lookup_fdh (eh, htab);
4606 if (fdh == NULL)
4607 {
4608 if (!info->relocatable
4609 && (eh->elf.root.type == bfd_link_hash_undefined
4610 || eh->elf.root.type == bfd_link_hash_undefweak)
4611 && eh->elf.ref_regular)
4612 {
4613 /* Make an undefweak function descriptor sym, which is enough to
4614 pull in an --as-needed shared lib, but won't cause link
4615 errors. Archives are handled elsewhere. */
4616 fdh = make_fdh (info, eh);
4617 if (fdh == NULL)
4618 return FALSE;
4619 fdh->elf.ref_regular = 1;
4620 }
4621 }
4622 else
4623 {
4624 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4625 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4626 if (entry_vis < descr_vis)
4627 fdh->elf.other += entry_vis - descr_vis;
4628 else if (entry_vis > descr_vis)
4629 eh->elf.other += descr_vis - entry_vis;
4630
4631 if ((fdh->elf.root.type == bfd_link_hash_defined
4632 || fdh->elf.root.type == bfd_link_hash_defweak)
4633 && eh->elf.root.type == bfd_link_hash_undefined)
4634 {
4635 eh->elf.root.type = bfd_link_hash_undefweak;
4636 eh->was_undefined = 1;
4637 htab->twiddled_syms = 1;
4638 }
4639 }
4640
4641 return TRUE;
4642 }
4643
4644 /* Process list of dot-symbols we made in link_hash_newfunc. */
4645
4646 static bfd_boolean
4647 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4648 {
4649 struct ppc_link_hash_table *htab;
4650 struct ppc_link_hash_entry **p, *eh;
4651
4652 htab = ppc_hash_table (info);
4653 if (!is_ppc64_elf (info->output_bfd))
4654 return TRUE;
4655
4656 if (is_ppc64_elf (ibfd))
4657 {
4658 p = &htab->dot_syms;
4659 while ((eh = *p) != NULL)
4660 {
4661 *p = NULL;
4662 if (!add_symbol_adjust (eh, info))
4663 return FALSE;
4664 p = &eh->u.next_dot_sym;
4665 }
4666 }
4667
4668 /* Clear the list for non-ppc64 input files. */
4669 p = &htab->dot_syms;
4670 while ((eh = *p) != NULL)
4671 {
4672 *p = NULL;
4673 p = &eh->u.next_dot_sym;
4674 }
4675
4676 /* We need to fix the undefs list for any syms we have twiddled to
4677 undef_weak. */
4678 if (htab->twiddled_syms)
4679 {
4680 bfd_link_repair_undef_list (&htab->elf.root);
4681 htab->twiddled_syms = 0;
4682 }
4683 return TRUE;
4684 }
4685
4686 /* Undo hash table changes when an --as-needed input file is determined
4687 not to be needed. */
4688
4689 static bfd_boolean
4690 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4691 struct bfd_link_info *info)
4692 {
4693 ppc_hash_table (info)->dot_syms = NULL;
4694 return TRUE;
4695 }
4696
4697 static struct plt_entry **
4698 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4699 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4700 {
4701 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4702 struct plt_entry **local_plt;
4703 char *local_got_tls_masks;
4704
4705 if (local_got_ents == NULL)
4706 {
4707 bfd_size_type size = symtab_hdr->sh_info;
4708
4709 size *= (sizeof (*local_got_ents)
4710 + sizeof (*local_plt)
4711 + sizeof (*local_got_tls_masks));
4712 local_got_ents = bfd_zalloc (abfd, size);
4713 if (local_got_ents == NULL)
4714 return NULL;
4715 elf_local_got_ents (abfd) = local_got_ents;
4716 }
4717
4718 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4719 {
4720 struct got_entry *ent;
4721
4722 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4723 if (ent->addend == r_addend
4724 && ent->owner == abfd
4725 && ent->tls_type == tls_type)
4726 break;
4727 if (ent == NULL)
4728 {
4729 bfd_size_type amt = sizeof (*ent);
4730 ent = bfd_alloc (abfd, amt);
4731 if (ent == NULL)
4732 return FALSE;
4733 ent->next = local_got_ents[r_symndx];
4734 ent->addend = r_addend;
4735 ent->owner = abfd;
4736 ent->tls_type = tls_type;
4737 ent->got.refcount = 0;
4738 local_got_ents[r_symndx] = ent;
4739 }
4740 ent->got.refcount += 1;
4741 }
4742
4743 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4744 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
4745 local_got_tls_masks[r_symndx] |= tls_type;
4746
4747 return local_plt + r_symndx;
4748 }
4749
4750 static bfd_boolean
4751 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4752 {
4753 struct plt_entry *ent;
4754
4755 for (ent = *plist; ent != NULL; ent = ent->next)
4756 if (ent->addend == addend)
4757 break;
4758 if (ent == NULL)
4759 {
4760 bfd_size_type amt = sizeof (*ent);
4761 ent = bfd_alloc (abfd, amt);
4762 if (ent == NULL)
4763 return FALSE;
4764 ent->next = *plist;
4765 ent->addend = addend;
4766 ent->plt.refcount = 0;
4767 *plist = ent;
4768 }
4769 ent->plt.refcount += 1;
4770 return TRUE;
4771 }
4772
4773 static bfd_boolean
4774 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4775 {
4776 return (r_type == R_PPC64_REL24
4777 || r_type == R_PPC64_REL14
4778 || r_type == R_PPC64_REL14_BRTAKEN
4779 || r_type == R_PPC64_REL14_BRNTAKEN
4780 || r_type == R_PPC64_ADDR24
4781 || r_type == R_PPC64_ADDR14
4782 || r_type == R_PPC64_ADDR14_BRTAKEN
4783 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4784 }
4785
4786 /* Look through the relocs for a section during the first phase, and
4787 calculate needed space in the global offset table, procedure
4788 linkage table, and dynamic reloc sections. */
4789
4790 static bfd_boolean
4791 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4792 asection *sec, const Elf_Internal_Rela *relocs)
4793 {
4794 struct ppc_link_hash_table *htab;
4795 Elf_Internal_Shdr *symtab_hdr;
4796 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4797 const Elf_Internal_Rela *rel;
4798 const Elf_Internal_Rela *rel_end;
4799 asection *sreloc;
4800 asection **opd_sym_map;
4801 struct elf_link_hash_entry *tga, *dottga;
4802
4803 if (info->relocatable)
4804 return TRUE;
4805
4806 /* Don't do anything special with non-loaded, non-alloced sections.
4807 In particular, any relocs in such sections should not affect GOT
4808 and PLT reference counting (ie. we don't allow them to create GOT
4809 or PLT entries), there's no possibility or desire to optimize TLS
4810 relocs, and there's not much point in propagating relocs to shared
4811 libs that the dynamic linker won't relocate. */
4812 if ((sec->flags & SEC_ALLOC) == 0)
4813 return TRUE;
4814
4815 BFD_ASSERT (is_ppc64_elf (abfd));
4816
4817 htab = ppc_hash_table (info);
4818 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4819 FALSE, FALSE, TRUE);
4820 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4821 FALSE, FALSE, TRUE);
4822 symtab_hdr = &elf_symtab_hdr (abfd);
4823
4824 sym_hashes = elf_sym_hashes (abfd);
4825 sym_hashes_end = (sym_hashes
4826 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4827 - symtab_hdr->sh_info);
4828
4829 sreloc = NULL;
4830 opd_sym_map = NULL;
4831 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4832 {
4833 /* Garbage collection needs some extra help with .opd sections.
4834 We don't want to necessarily keep everything referenced by
4835 relocs in .opd, as that would keep all functions. Instead,
4836 if we reference an .opd symbol (a function descriptor), we
4837 want to keep the function code symbol's section. This is
4838 easy for global symbols, but for local syms we need to keep
4839 information about the associated function section. */
4840 bfd_size_type amt;
4841
4842 amt = sec->size * sizeof (*opd_sym_map) / 8;
4843 opd_sym_map = bfd_zalloc (abfd, amt);
4844 if (opd_sym_map == NULL)
4845 return FALSE;
4846 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4847 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4848 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4849 }
4850
4851 if (htab->sfpr == NULL
4852 && !create_linkage_sections (htab->elf.dynobj, info))
4853 return FALSE;
4854
4855 rel_end = relocs + sec->reloc_count;
4856 for (rel = relocs; rel < rel_end; rel++)
4857 {
4858 unsigned long r_symndx;
4859 struct elf_link_hash_entry *h;
4860 enum elf_ppc64_reloc_type r_type;
4861 int tls_type;
4862 struct _ppc64_elf_section_data *ppc64_sec;
4863 struct plt_entry **ifunc;
4864
4865 r_symndx = ELF64_R_SYM (rel->r_info);
4866 if (r_symndx < symtab_hdr->sh_info)
4867 h = NULL;
4868 else
4869 {
4870 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4871 h = elf_follow_link (h);
4872 }
4873
4874 tls_type = 0;
4875 ifunc = NULL;
4876 if (h != NULL)
4877 {
4878 if (h->type == STT_GNU_IFUNC)
4879 {
4880 h->needs_plt = 1;
4881 ifunc = &h->plt.plist;
4882 }
4883 }
4884 else
4885 {
4886 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4887 abfd, r_symndx);
4888 if (isym == NULL)
4889 return FALSE;
4890
4891 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4892 {
4893 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4894 rel->r_addend, PLT_IFUNC);
4895 if (ifunc == NULL)
4896 return FALSE;
4897 }
4898 }
4899 r_type = ELF64_R_TYPE (rel->r_info);
4900 if (is_branch_reloc (r_type))
4901 {
4902 if (h != NULL && (h == tga || h == dottga))
4903 {
4904 if (rel != relocs
4905 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4906 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4907 /* We have a new-style __tls_get_addr call with a marker
4908 reloc. */
4909 ;
4910 else
4911 /* Mark this section as having an old-style call. */
4912 sec->has_tls_get_addr_call = 1;
4913 }
4914
4915 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4916 if (ifunc != NULL
4917 && !update_plt_info (abfd, ifunc, rel->r_addend))
4918 return FALSE;
4919 }
4920
4921 switch (r_type)
4922 {
4923 case R_PPC64_TLSGD:
4924 case R_PPC64_TLSLD:
4925 /* These special tls relocs tie a call to __tls_get_addr with
4926 its parameter symbol. */
4927 break;
4928
4929 case R_PPC64_GOT_TLSLD16:
4930 case R_PPC64_GOT_TLSLD16_LO:
4931 case R_PPC64_GOT_TLSLD16_HI:
4932 case R_PPC64_GOT_TLSLD16_HA:
4933 tls_type = TLS_TLS | TLS_LD;
4934 goto dogottls;
4935
4936 case R_PPC64_GOT_TLSGD16:
4937 case R_PPC64_GOT_TLSGD16_LO:
4938 case R_PPC64_GOT_TLSGD16_HI:
4939 case R_PPC64_GOT_TLSGD16_HA:
4940 tls_type = TLS_TLS | TLS_GD;
4941 goto dogottls;
4942
4943 case R_PPC64_GOT_TPREL16_DS:
4944 case R_PPC64_GOT_TPREL16_LO_DS:
4945 case R_PPC64_GOT_TPREL16_HI:
4946 case R_PPC64_GOT_TPREL16_HA:
4947 if (!info->executable)
4948 info->flags |= DF_STATIC_TLS;
4949 tls_type = TLS_TLS | TLS_TPREL;
4950 goto dogottls;
4951
4952 case R_PPC64_GOT_DTPREL16_DS:
4953 case R_PPC64_GOT_DTPREL16_LO_DS:
4954 case R_PPC64_GOT_DTPREL16_HI:
4955 case R_PPC64_GOT_DTPREL16_HA:
4956 tls_type = TLS_TLS | TLS_DTPREL;
4957 dogottls:
4958 sec->has_tls_reloc = 1;
4959 /* Fall thru */
4960
4961 case R_PPC64_GOT16:
4962 case R_PPC64_GOT16_DS:
4963 case R_PPC64_GOT16_HA:
4964 case R_PPC64_GOT16_HI:
4965 case R_PPC64_GOT16_LO:
4966 case R_PPC64_GOT16_LO_DS:
4967 /* This symbol requires a global offset table entry. */
4968 sec->has_toc_reloc = 1;
4969 if (ppc64_elf_tdata (abfd)->got == NULL
4970 && !create_got_section (abfd, info))
4971 return FALSE;
4972
4973 if (h != NULL)
4974 {
4975 struct ppc_link_hash_entry *eh;
4976 struct got_entry *ent;
4977
4978 eh = (struct ppc_link_hash_entry *) h;
4979 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4980 if (ent->addend == rel->r_addend
4981 && ent->owner == abfd
4982 && ent->tls_type == tls_type)
4983 break;
4984 if (ent == NULL)
4985 {
4986 bfd_size_type amt = sizeof (*ent);
4987 ent = bfd_alloc (abfd, amt);
4988 if (ent == NULL)
4989 return FALSE;
4990 ent->next = eh->elf.got.glist;
4991 ent->addend = rel->r_addend;
4992 ent->owner = abfd;
4993 ent->tls_type = tls_type;
4994 ent->got.refcount = 0;
4995 eh->elf.got.glist = ent;
4996 }
4997 ent->got.refcount += 1;
4998 eh->tls_mask |= tls_type;
4999 }
5000 else
5001 /* This is a global offset table entry for a local symbol. */
5002 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5003 rel->r_addend, tls_type))
5004 return FALSE;
5005 break;
5006
5007 case R_PPC64_PLT16_HA:
5008 case R_PPC64_PLT16_HI:
5009 case R_PPC64_PLT16_LO:
5010 case R_PPC64_PLT32:
5011 case R_PPC64_PLT64:
5012 /* This symbol requires a procedure linkage table entry. We
5013 actually build the entry in adjust_dynamic_symbol,
5014 because this might be a case of linking PIC code without
5015 linking in any dynamic objects, in which case we don't
5016 need to generate a procedure linkage table after all. */
5017 if (h == NULL)
5018 {
5019 /* It does not make sense to have a procedure linkage
5020 table entry for a local symbol. */
5021 bfd_set_error (bfd_error_bad_value);
5022 return FALSE;
5023 }
5024 else
5025 {
5026 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5027 return FALSE;
5028 h->needs_plt = 1;
5029 if (h->root.root.string[0] == '.'
5030 && h->root.root.string[1] != '\0')
5031 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5032 }
5033 break;
5034
5035 /* The following relocations don't need to propagate the
5036 relocation if linking a shared object since they are
5037 section relative. */
5038 case R_PPC64_SECTOFF:
5039 case R_PPC64_SECTOFF_LO:
5040 case R_PPC64_SECTOFF_HI:
5041 case R_PPC64_SECTOFF_HA:
5042 case R_PPC64_SECTOFF_DS:
5043 case R_PPC64_SECTOFF_LO_DS:
5044 case R_PPC64_DTPREL16:
5045 case R_PPC64_DTPREL16_LO:
5046 case R_PPC64_DTPREL16_HI:
5047 case R_PPC64_DTPREL16_HA:
5048 case R_PPC64_DTPREL16_DS:
5049 case R_PPC64_DTPREL16_LO_DS:
5050 case R_PPC64_DTPREL16_HIGHER:
5051 case R_PPC64_DTPREL16_HIGHERA:
5052 case R_PPC64_DTPREL16_HIGHEST:
5053 case R_PPC64_DTPREL16_HIGHESTA:
5054 break;
5055
5056 /* Nor do these. */
5057 case R_PPC64_REL16:
5058 case R_PPC64_REL16_LO:
5059 case R_PPC64_REL16_HI:
5060 case R_PPC64_REL16_HA:
5061 break;
5062
5063 case R_PPC64_TOC16:
5064 case R_PPC64_TOC16_LO:
5065 case R_PPC64_TOC16_HI:
5066 case R_PPC64_TOC16_HA:
5067 case R_PPC64_TOC16_DS:
5068 case R_PPC64_TOC16_LO_DS:
5069 sec->has_toc_reloc = 1;
5070 break;
5071
5072 /* This relocation describes the C++ object vtable hierarchy.
5073 Reconstruct it for later use during GC. */
5074 case R_PPC64_GNU_VTINHERIT:
5075 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5076 return FALSE;
5077 break;
5078
5079 /* This relocation describes which C++ vtable entries are actually
5080 used. Record for later use during GC. */
5081 case R_PPC64_GNU_VTENTRY:
5082 BFD_ASSERT (h != NULL);
5083 if (h != NULL
5084 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5085 return FALSE;
5086 break;
5087
5088 case R_PPC64_REL14:
5089 case R_PPC64_REL14_BRTAKEN:
5090 case R_PPC64_REL14_BRNTAKEN:
5091 {
5092 asection *dest = NULL;
5093
5094 /* Heuristic: If jumping outside our section, chances are
5095 we are going to need a stub. */
5096 if (h != NULL)
5097 {
5098 /* If the sym is weak it may be overridden later, so
5099 don't assume we know where a weak sym lives. */
5100 if (h->root.type == bfd_link_hash_defined)
5101 dest = h->root.u.def.section;
5102 }
5103 else
5104 {
5105 Elf_Internal_Sym *isym;
5106
5107 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5108 abfd, r_symndx);
5109 if (isym == NULL)
5110 return FALSE;
5111
5112 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5113 }
5114
5115 if (dest != sec)
5116 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5117 }
5118 /* Fall through. */
5119
5120 case R_PPC64_REL24:
5121 if (h != NULL && ifunc == NULL)
5122 {
5123 /* We may need a .plt entry if the function this reloc
5124 refers to is in a shared lib. */
5125 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5126 return FALSE;
5127 h->needs_plt = 1;
5128 if (h->root.root.string[0] == '.'
5129 && h->root.root.string[1] != '\0')
5130 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5131 if (h == tga || h == dottga)
5132 sec->has_tls_reloc = 1;
5133 }
5134 break;
5135
5136 case R_PPC64_TPREL64:
5137 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5138 if (!info->executable)
5139 info->flags |= DF_STATIC_TLS;
5140 goto dotlstoc;
5141
5142 case R_PPC64_DTPMOD64:
5143 if (rel + 1 < rel_end
5144 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5145 && rel[1].r_offset == rel->r_offset + 8)
5146 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5147 else
5148 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5149 goto dotlstoc;
5150
5151 case R_PPC64_DTPREL64:
5152 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5153 if (rel != relocs
5154 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5155 && rel[-1].r_offset == rel->r_offset - 8)
5156 /* This is the second reloc of a dtpmod, dtprel pair.
5157 Don't mark with TLS_DTPREL. */
5158 goto dodyn;
5159
5160 dotlstoc:
5161 sec->has_tls_reloc = 1;
5162 if (h != NULL)
5163 {
5164 struct ppc_link_hash_entry *eh;
5165 eh = (struct ppc_link_hash_entry *) h;
5166 eh->tls_mask |= tls_type;
5167 }
5168 else
5169 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5170 rel->r_addend, tls_type))
5171 return FALSE;
5172
5173 ppc64_sec = ppc64_elf_section_data (sec);
5174 if (ppc64_sec->sec_type != sec_toc)
5175 {
5176 bfd_size_type amt;
5177
5178 /* One extra to simplify get_tls_mask. */
5179 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5180 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5181 if (ppc64_sec->u.toc.symndx == NULL)
5182 return FALSE;
5183 amt = sec->size * sizeof (bfd_vma) / 8;
5184 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5185 if (ppc64_sec->u.toc.add == NULL)
5186 return FALSE;
5187 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5188 ppc64_sec->sec_type = sec_toc;
5189 }
5190 BFD_ASSERT (rel->r_offset % 8 == 0);
5191 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5192 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5193
5194 /* Mark the second slot of a GD or LD entry.
5195 -1 to indicate GD and -2 to indicate LD. */
5196 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5197 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5198 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5199 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5200 goto dodyn;
5201
5202 case R_PPC64_TPREL16:
5203 case R_PPC64_TPREL16_LO:
5204 case R_PPC64_TPREL16_HI:
5205 case R_PPC64_TPREL16_HA:
5206 case R_PPC64_TPREL16_DS:
5207 case R_PPC64_TPREL16_LO_DS:
5208 case R_PPC64_TPREL16_HIGHER:
5209 case R_PPC64_TPREL16_HIGHERA:
5210 case R_PPC64_TPREL16_HIGHEST:
5211 case R_PPC64_TPREL16_HIGHESTA:
5212 if (info->shared)
5213 {
5214 if (!info->executable)
5215 info->flags |= DF_STATIC_TLS;
5216 goto dodyn;
5217 }
5218 break;
5219
5220 case R_PPC64_ADDR64:
5221 if (opd_sym_map != NULL
5222 && rel + 1 < rel_end
5223 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5224 {
5225 if (h != NULL)
5226 {
5227 if (h->root.root.string[0] == '.'
5228 && h->root.root.string[1] != 0
5229 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5230 ;
5231 else
5232 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5233 }
5234 else
5235 {
5236 asection *s;
5237 Elf_Internal_Sym *isym;
5238
5239 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5240 abfd, r_symndx);
5241 if (isym == NULL)
5242 return FALSE;
5243
5244 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5245 if (s != NULL && s != sec)
5246 opd_sym_map[rel->r_offset / 8] = s;
5247 }
5248 }
5249 /* Fall through. */
5250
5251 case R_PPC64_REL30:
5252 case R_PPC64_REL32:
5253 case R_PPC64_REL64:
5254 case R_PPC64_ADDR14:
5255 case R_PPC64_ADDR14_BRNTAKEN:
5256 case R_PPC64_ADDR14_BRTAKEN:
5257 case R_PPC64_ADDR16:
5258 case R_PPC64_ADDR16_DS:
5259 case R_PPC64_ADDR16_HA:
5260 case R_PPC64_ADDR16_HI:
5261 case R_PPC64_ADDR16_HIGHER:
5262 case R_PPC64_ADDR16_HIGHERA:
5263 case R_PPC64_ADDR16_HIGHEST:
5264 case R_PPC64_ADDR16_HIGHESTA:
5265 case R_PPC64_ADDR16_LO:
5266 case R_PPC64_ADDR16_LO_DS:
5267 case R_PPC64_ADDR24:
5268 case R_PPC64_ADDR32:
5269 case R_PPC64_UADDR16:
5270 case R_PPC64_UADDR32:
5271 case R_PPC64_UADDR64:
5272 case R_PPC64_TOC:
5273 if (h != NULL && !info->shared)
5274 /* We may need a copy reloc. */
5275 h->non_got_ref = 1;
5276
5277 /* Don't propagate .opd relocs. */
5278 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5279 break;
5280
5281 /* If we are creating a shared library, and this is a reloc
5282 against a global symbol, or a non PC relative reloc
5283 against a local symbol, then we need to copy the reloc
5284 into the shared library. However, if we are linking with
5285 -Bsymbolic, we do not need to copy a reloc against a
5286 global symbol which is defined in an object we are
5287 including in the link (i.e., DEF_REGULAR is set). At
5288 this point we have not seen all the input files, so it is
5289 possible that DEF_REGULAR is not set now but will be set
5290 later (it is never cleared). In case of a weak definition,
5291 DEF_REGULAR may be cleared later by a strong definition in
5292 a shared library. We account for that possibility below by
5293 storing information in the dyn_relocs field of the hash
5294 table entry. A similar situation occurs when creating
5295 shared libraries and symbol visibility changes render the
5296 symbol local.
5297
5298 If on the other hand, we are creating an executable, we
5299 may need to keep relocations for symbols satisfied by a
5300 dynamic library if we manage to avoid copy relocs for the
5301 symbol. */
5302 dodyn:
5303 if ((info->shared
5304 && (must_be_dyn_reloc (info, r_type)
5305 || (h != NULL
5306 && (! info->symbolic
5307 || h->root.type == bfd_link_hash_defweak
5308 || !h->def_regular))))
5309 || (ELIMINATE_COPY_RELOCS
5310 && !info->shared
5311 && h != NULL
5312 && (h->root.type == bfd_link_hash_defweak
5313 || !h->def_regular))
5314 || (!info->shared
5315 && ifunc != NULL))
5316 {
5317 struct ppc_dyn_relocs *p;
5318 struct ppc_dyn_relocs **head;
5319
5320 /* We must copy these reloc types into the output file.
5321 Create a reloc section in dynobj and make room for
5322 this reloc. */
5323 if (sreloc == NULL)
5324 {
5325 sreloc = _bfd_elf_make_dynamic_reloc_section
5326 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5327
5328 if (sreloc == NULL)
5329 return FALSE;
5330 }
5331
5332 /* If this is a global symbol, we count the number of
5333 relocations we need for this symbol. */
5334 if (h != NULL)
5335 {
5336 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5337 }
5338 else
5339 {
5340 /* Track dynamic relocs needed for local syms too.
5341 We really need local syms available to do this
5342 easily. Oh well. */
5343 asection *s;
5344 void *vpp;
5345 Elf_Internal_Sym *isym;
5346
5347 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5348 abfd, r_symndx);
5349 if (isym == NULL)
5350 return FALSE;
5351
5352 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5353 if (s == NULL)
5354 s = sec;
5355
5356 vpp = &elf_section_data (s)->local_dynrel;
5357 head = (struct ppc_dyn_relocs **) vpp;
5358 }
5359
5360 p = *head;
5361 if (p == NULL || p->sec != sec)
5362 {
5363 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5364 if (p == NULL)
5365 return FALSE;
5366 p->next = *head;
5367 *head = p;
5368 p->sec = sec;
5369 p->count = 0;
5370 p->pc_count = 0;
5371 }
5372
5373 p->count += 1;
5374 if (!must_be_dyn_reloc (info, r_type))
5375 p->pc_count += 1;
5376 }
5377 break;
5378
5379 default:
5380 break;
5381 }
5382 }
5383
5384 return TRUE;
5385 }
5386
5387 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5388 of the code entry point, and its section. */
5389
5390 static bfd_vma
5391 opd_entry_value (asection *opd_sec,
5392 bfd_vma offset,
5393 asection **code_sec,
5394 bfd_vma *code_off)
5395 {
5396 bfd *opd_bfd = opd_sec->owner;
5397 Elf_Internal_Rela *relocs;
5398 Elf_Internal_Rela *lo, *hi, *look;
5399 bfd_vma val;
5400
5401 /* No relocs implies we are linking a --just-symbols object. */
5402 if (opd_sec->reloc_count == 0)
5403 {
5404 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5405 return (bfd_vma) -1;
5406
5407 if (code_sec != NULL)
5408 {
5409 asection *sec, *likely = NULL;
5410 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5411 if (sec->vma <= val
5412 && (sec->flags & SEC_LOAD) != 0
5413 && (sec->flags & SEC_ALLOC) != 0)
5414 likely = sec;
5415 if (likely != NULL)
5416 {
5417 *code_sec = likely;
5418 if (code_off != NULL)
5419 *code_off = val - likely->vma;
5420 }
5421 }
5422 return val;
5423 }
5424
5425 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5426
5427 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5428 if (relocs == NULL)
5429 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5430
5431 /* Go find the opd reloc at the sym address. */
5432 lo = relocs;
5433 BFD_ASSERT (lo != NULL);
5434 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5435 val = (bfd_vma) -1;
5436 while (lo < hi)
5437 {
5438 look = lo + (hi - lo) / 2;
5439 if (look->r_offset < offset)
5440 lo = look + 1;
5441 else if (look->r_offset > offset)
5442 hi = look;
5443 else
5444 {
5445 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5446
5447 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5448 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5449 {
5450 unsigned long symndx = ELF64_R_SYM (look->r_info);
5451 asection *sec;
5452
5453 if (symndx < symtab_hdr->sh_info)
5454 {
5455 Elf_Internal_Sym *sym;
5456
5457 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5458 if (sym == NULL)
5459 {
5460 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5461 symtab_hdr->sh_info,
5462 0, NULL, NULL, NULL);
5463 if (sym == NULL)
5464 break;
5465 symtab_hdr->contents = (bfd_byte *) sym;
5466 }
5467
5468 sym += symndx;
5469 val = sym->st_value;
5470 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5471 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5472 }
5473 else
5474 {
5475 struct elf_link_hash_entry **sym_hashes;
5476 struct elf_link_hash_entry *rh;
5477
5478 sym_hashes = elf_sym_hashes (opd_bfd);
5479 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5480 rh = elf_follow_link (rh);
5481 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5482 || rh->root.type == bfd_link_hash_defweak);
5483 val = rh->root.u.def.value;
5484 sec = rh->root.u.def.section;
5485 }
5486 val += look->r_addend;
5487 if (code_off != NULL)
5488 *code_off = val;
5489 if (code_sec != NULL)
5490 *code_sec = sec;
5491 if (sec != NULL && sec->output_section != NULL)
5492 val += sec->output_section->vma + sec->output_offset;
5493 }
5494 break;
5495 }
5496 }
5497
5498 return val;
5499 }
5500
5501 /* If FDH is a function descriptor symbol, return the associated code
5502 entry symbol if it is defined. Return NULL otherwise. */
5503
5504 static struct ppc_link_hash_entry *
5505 defined_code_entry (struct ppc_link_hash_entry *fdh)
5506 {
5507 if (fdh->is_func_descriptor)
5508 {
5509 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5510 if (fh->elf.root.type == bfd_link_hash_defined
5511 || fh->elf.root.type == bfd_link_hash_defweak)
5512 return fh;
5513 }
5514 return NULL;
5515 }
5516
5517 /* If FH is a function code entry symbol, return the associated
5518 function descriptor symbol if it is defined. Return NULL otherwise. */
5519
5520 static struct ppc_link_hash_entry *
5521 defined_func_desc (struct ppc_link_hash_entry *fh)
5522 {
5523 if (fh->oh != NULL
5524 && fh->oh->is_func_descriptor)
5525 {
5526 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5527 if (fdh->elf.root.type == bfd_link_hash_defined
5528 || fdh->elf.root.type == bfd_link_hash_defweak)
5529 return fdh;
5530 }
5531 return NULL;
5532 }
5533
5534 /* Mark all our entry sym sections, both opd and code section. */
5535
5536 static void
5537 ppc64_elf_gc_keep (struct bfd_link_info *info)
5538 {
5539 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5540 struct bfd_sym_chain *sym;
5541
5542 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5543 {
5544 struct ppc_link_hash_entry *eh, *fh;
5545 asection *sec;
5546
5547 eh = (struct ppc_link_hash_entry *)
5548 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5549 if (eh == NULL)
5550 continue;
5551 if (eh->elf.root.type != bfd_link_hash_defined
5552 && eh->elf.root.type != bfd_link_hash_defweak)
5553 continue;
5554
5555 fh = defined_code_entry (eh);
5556 if (fh != NULL)
5557 {
5558 sec = fh->elf.root.u.def.section;
5559 sec->flags |= SEC_KEEP;
5560 }
5561 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5562 && opd_entry_value (eh->elf.root.u.def.section,
5563 eh->elf.root.u.def.value,
5564 &sec, NULL) != (bfd_vma) -1)
5565 sec->flags |= SEC_KEEP;
5566
5567 sec = eh->elf.root.u.def.section;
5568 sec->flags |= SEC_KEEP;
5569 }
5570 }
5571
5572 /* Mark sections containing dynamically referenced symbols. When
5573 building shared libraries, we must assume that any visible symbol is
5574 referenced. */
5575
5576 static bfd_boolean
5577 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5578 {
5579 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5580 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5581 struct ppc_link_hash_entry *fdh;
5582
5583 if (eh->elf.root.type == bfd_link_hash_warning)
5584 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5585
5586 /* Dynamic linking info is on the func descriptor sym. */
5587 fdh = defined_func_desc (eh);
5588 if (fdh != NULL)
5589 eh = fdh;
5590
5591 if ((eh->elf.root.type == bfd_link_hash_defined
5592 || eh->elf.root.type == bfd_link_hash_defweak)
5593 && (eh->elf.ref_dynamic
5594 || (!info->executable
5595 && eh->elf.def_regular
5596 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5597 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5598 {
5599 asection *code_sec;
5600 struct ppc_link_hash_entry *fh;
5601
5602 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5603
5604 /* Function descriptor syms cause the associated
5605 function code sym section to be marked. */
5606 fh = defined_code_entry (eh);
5607 if (fh != NULL)
5608 {
5609 code_sec = fh->elf.root.u.def.section;
5610 code_sec->flags |= SEC_KEEP;
5611 }
5612 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5613 && opd_entry_value (eh->elf.root.u.def.section,
5614 eh->elf.root.u.def.value,
5615 &code_sec, NULL) != (bfd_vma) -1)
5616 code_sec->flags |= SEC_KEEP;
5617 }
5618
5619 return TRUE;
5620 }
5621
5622 /* Return the section that should be marked against GC for a given
5623 relocation. */
5624
5625 static asection *
5626 ppc64_elf_gc_mark_hook (asection *sec,
5627 struct bfd_link_info *info,
5628 Elf_Internal_Rela *rel,
5629 struct elf_link_hash_entry *h,
5630 Elf_Internal_Sym *sym)
5631 {
5632 asection *rsec;
5633
5634 /* Syms return NULL if we're marking .opd, so we avoid marking all
5635 function sections, as all functions are referenced in .opd. */
5636 rsec = NULL;
5637 if (get_opd_info (sec) != NULL)
5638 return rsec;
5639
5640 if (h != NULL)
5641 {
5642 enum elf_ppc64_reloc_type r_type;
5643 struct ppc_link_hash_entry *eh, *fh, *fdh;
5644
5645 r_type = ELF64_R_TYPE (rel->r_info);
5646 switch (r_type)
5647 {
5648 case R_PPC64_GNU_VTINHERIT:
5649 case R_PPC64_GNU_VTENTRY:
5650 break;
5651
5652 default:
5653 switch (h->root.type)
5654 {
5655 case bfd_link_hash_defined:
5656 case bfd_link_hash_defweak:
5657 eh = (struct ppc_link_hash_entry *) h;
5658 fdh = defined_func_desc (eh);
5659 if (fdh != NULL)
5660 eh = fdh;
5661
5662 /* Function descriptor syms cause the associated
5663 function code sym section to be marked. */
5664 fh = defined_code_entry (eh);
5665 if (fh != NULL)
5666 {
5667 /* They also mark their opd section. */
5668 eh->elf.root.u.def.section->gc_mark = 1;
5669
5670 rsec = fh->elf.root.u.def.section;
5671 }
5672 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5673 && opd_entry_value (eh->elf.root.u.def.section,
5674 eh->elf.root.u.def.value,
5675 &rsec, NULL) != (bfd_vma) -1)
5676 eh->elf.root.u.def.section->gc_mark = 1;
5677 else
5678 rsec = h->root.u.def.section;
5679 break;
5680
5681 case bfd_link_hash_common:
5682 rsec = h->root.u.c.p->section;
5683 break;
5684
5685 default:
5686 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5687 }
5688 }
5689 }
5690 else
5691 {
5692 struct _opd_sec_data *opd;
5693
5694 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5695 opd = get_opd_info (rsec);
5696 if (opd != NULL && opd->func_sec != NULL)
5697 {
5698 rsec->gc_mark = 1;
5699
5700 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5701 }
5702 }
5703
5704 return rsec;
5705 }
5706
5707 /* Update the .got, .plt. and dynamic reloc reference counts for the
5708 section being removed. */
5709
5710 static bfd_boolean
5711 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5712 asection *sec, const Elf_Internal_Rela *relocs)
5713 {
5714 struct ppc_link_hash_table *htab;
5715 Elf_Internal_Shdr *symtab_hdr;
5716 struct elf_link_hash_entry **sym_hashes;
5717 struct got_entry **local_got_ents;
5718 const Elf_Internal_Rela *rel, *relend;
5719
5720 if (info->relocatable)
5721 return TRUE;
5722
5723 if ((sec->flags & SEC_ALLOC) == 0)
5724 return TRUE;
5725
5726 elf_section_data (sec)->local_dynrel = NULL;
5727
5728 htab = ppc_hash_table (info);
5729 symtab_hdr = &elf_symtab_hdr (abfd);
5730 sym_hashes = elf_sym_hashes (abfd);
5731 local_got_ents = elf_local_got_ents (abfd);
5732
5733 relend = relocs + sec->reloc_count;
5734 for (rel = relocs; rel < relend; rel++)
5735 {
5736 unsigned long r_symndx;
5737 enum elf_ppc64_reloc_type r_type;
5738 struct elf_link_hash_entry *h = NULL;
5739 char tls_type = 0;
5740
5741 r_symndx = ELF64_R_SYM (rel->r_info);
5742 r_type = ELF64_R_TYPE (rel->r_info);
5743 if (r_symndx >= symtab_hdr->sh_info)
5744 {
5745 struct ppc_link_hash_entry *eh;
5746 struct ppc_dyn_relocs **pp;
5747 struct ppc_dyn_relocs *p;
5748
5749 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5750 h = elf_follow_link (h);
5751 eh = (struct ppc_link_hash_entry *) h;
5752
5753 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5754 if (p->sec == sec)
5755 {
5756 /* Everything must go for SEC. */
5757 *pp = p->next;
5758 break;
5759 }
5760 }
5761
5762 if (is_branch_reloc (r_type))
5763 {
5764 struct plt_entry **ifunc = NULL;
5765 if (h != NULL)
5766 {
5767 if (h->type == STT_GNU_IFUNC)
5768 ifunc = &h->plt.plist;
5769 }
5770 else if (local_got_ents != NULL)
5771 {
5772 struct plt_entry **local_plt = (struct plt_entry **)
5773 (local_got_ents + symtab_hdr->sh_info);
5774 char *local_got_tls_masks = (char *)
5775 (local_plt + symtab_hdr->sh_info);
5776 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5777 ifunc = local_plt + r_symndx;
5778 }
5779 if (ifunc != NULL)
5780 {
5781 struct plt_entry *ent;
5782
5783 for (ent = *ifunc; ent != NULL; ent = ent->next)
5784 if (ent->addend == rel->r_addend)
5785 break;
5786 if (ent == NULL)
5787 abort ();
5788 if (ent->plt.refcount > 0)
5789 ent->plt.refcount -= 1;
5790 continue;
5791 }
5792 }
5793
5794 switch (r_type)
5795 {
5796 case R_PPC64_GOT_TLSLD16:
5797 case R_PPC64_GOT_TLSLD16_LO:
5798 case R_PPC64_GOT_TLSLD16_HI:
5799 case R_PPC64_GOT_TLSLD16_HA:
5800 tls_type = TLS_TLS | TLS_LD;
5801 goto dogot;
5802
5803 case R_PPC64_GOT_TLSGD16:
5804 case R_PPC64_GOT_TLSGD16_LO:
5805 case R_PPC64_GOT_TLSGD16_HI:
5806 case R_PPC64_GOT_TLSGD16_HA:
5807 tls_type = TLS_TLS | TLS_GD;
5808 goto dogot;
5809
5810 case R_PPC64_GOT_TPREL16_DS:
5811 case R_PPC64_GOT_TPREL16_LO_DS:
5812 case R_PPC64_GOT_TPREL16_HI:
5813 case R_PPC64_GOT_TPREL16_HA:
5814 tls_type = TLS_TLS | TLS_TPREL;
5815 goto dogot;
5816
5817 case R_PPC64_GOT_DTPREL16_DS:
5818 case R_PPC64_GOT_DTPREL16_LO_DS:
5819 case R_PPC64_GOT_DTPREL16_HI:
5820 case R_PPC64_GOT_DTPREL16_HA:
5821 tls_type = TLS_TLS | TLS_DTPREL;
5822 goto dogot;
5823
5824 case R_PPC64_GOT16:
5825 case R_PPC64_GOT16_DS:
5826 case R_PPC64_GOT16_HA:
5827 case R_PPC64_GOT16_HI:
5828 case R_PPC64_GOT16_LO:
5829 case R_PPC64_GOT16_LO_DS:
5830 dogot:
5831 {
5832 struct got_entry *ent;
5833
5834 if (h != NULL)
5835 ent = h->got.glist;
5836 else
5837 ent = local_got_ents[r_symndx];
5838
5839 for (; ent != NULL; ent = ent->next)
5840 if (ent->addend == rel->r_addend
5841 && ent->owner == abfd
5842 && ent->tls_type == tls_type)
5843 break;
5844 if (ent == NULL)
5845 abort ();
5846 if (ent->got.refcount > 0)
5847 ent->got.refcount -= 1;
5848 }
5849 break;
5850
5851 case R_PPC64_PLT16_HA:
5852 case R_PPC64_PLT16_HI:
5853 case R_PPC64_PLT16_LO:
5854 case R_PPC64_PLT32:
5855 case R_PPC64_PLT64:
5856 case R_PPC64_REL14:
5857 case R_PPC64_REL14_BRNTAKEN:
5858 case R_PPC64_REL14_BRTAKEN:
5859 case R_PPC64_REL24:
5860 if (h != NULL)
5861 {
5862 struct plt_entry *ent;
5863
5864 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5865 if (ent->addend == rel->r_addend)
5866 break;
5867 if (ent != NULL && ent->plt.refcount > 0)
5868 ent->plt.refcount -= 1;
5869 }
5870 break;
5871
5872 default:
5873 break;
5874 }
5875 }
5876 return TRUE;
5877 }
5878
5879 /* The maximum size of .sfpr. */
5880 #define SFPR_MAX (218*4)
5881
5882 struct sfpr_def_parms
5883 {
5884 const char name[12];
5885 unsigned char lo, hi;
5886 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5887 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5888 };
5889
5890 /* Auto-generate _save*, _rest* functions in .sfpr. */
5891
5892 static unsigned int
5893 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5894 {
5895 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5896 unsigned int i;
5897 size_t len = strlen (parm->name);
5898 bfd_boolean writing = FALSE;
5899 char sym[16];
5900
5901 memcpy (sym, parm->name, len);
5902 sym[len + 2] = 0;
5903
5904 for (i = parm->lo; i <= parm->hi; i++)
5905 {
5906 struct elf_link_hash_entry *h;
5907
5908 sym[len + 0] = i / 10 + '0';
5909 sym[len + 1] = i % 10 + '0';
5910 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5911 if (h != NULL
5912 && !h->def_regular)
5913 {
5914 h->root.type = bfd_link_hash_defined;
5915 h->root.u.def.section = htab->sfpr;
5916 h->root.u.def.value = htab->sfpr->size;
5917 h->type = STT_FUNC;
5918 h->def_regular = 1;
5919 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5920 writing = TRUE;
5921 if (htab->sfpr->contents == NULL)
5922 {
5923 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5924 if (htab->sfpr->contents == NULL)
5925 return FALSE;
5926 }
5927 }
5928 if (writing)
5929 {
5930 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5931 if (i != parm->hi)
5932 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5933 else
5934 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5935 htab->sfpr->size = p - htab->sfpr->contents;
5936 }
5937 }
5938
5939 return TRUE;
5940 }
5941
5942 static bfd_byte *
5943 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5944 {
5945 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5946 return p + 4;
5947 }
5948
5949 static bfd_byte *
5950 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5951 {
5952 p = savegpr0 (abfd, p, r);
5953 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5954 p = p + 4;
5955 bfd_put_32 (abfd, BLR, p);
5956 return p + 4;
5957 }
5958
5959 static bfd_byte *
5960 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5961 {
5962 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5963 return p + 4;
5964 }
5965
5966 static bfd_byte *
5967 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5968 {
5969 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5970 p = p + 4;
5971 p = restgpr0 (abfd, p, r);
5972 bfd_put_32 (abfd, MTLR_R0, p);
5973 p = p + 4;
5974 if (r == 29)
5975 {
5976 p = restgpr0 (abfd, p, 30);
5977 p = restgpr0 (abfd, p, 31);
5978 }
5979 bfd_put_32 (abfd, BLR, p);
5980 return p + 4;
5981 }
5982
5983 static bfd_byte *
5984 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5985 {
5986 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5987 return p + 4;
5988 }
5989
5990 static bfd_byte *
5991 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5992 {
5993 p = savegpr1 (abfd, p, r);
5994 bfd_put_32 (abfd, BLR, p);
5995 return p + 4;
5996 }
5997
5998 static bfd_byte *
5999 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6000 {
6001 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6002 return p + 4;
6003 }
6004
6005 static bfd_byte *
6006 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6007 {
6008 p = restgpr1 (abfd, p, r);
6009 bfd_put_32 (abfd, BLR, p);
6010 return p + 4;
6011 }
6012
6013 static bfd_byte *
6014 savefpr (bfd *abfd, bfd_byte *p, int r)
6015 {
6016 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6017 return p + 4;
6018 }
6019
6020 static bfd_byte *
6021 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6022 {
6023 p = savefpr (abfd, p, r);
6024 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6025 p = p + 4;
6026 bfd_put_32 (abfd, BLR, p);
6027 return p + 4;
6028 }
6029
6030 static bfd_byte *
6031 restfpr (bfd *abfd, bfd_byte *p, int r)
6032 {
6033 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6034 return p + 4;
6035 }
6036
6037 static bfd_byte *
6038 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6039 {
6040 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6041 p = p + 4;
6042 p = restfpr (abfd, p, r);
6043 bfd_put_32 (abfd, MTLR_R0, p);
6044 p = p + 4;
6045 if (r == 29)
6046 {
6047 p = restfpr (abfd, p, 30);
6048 p = restfpr (abfd, p, 31);
6049 }
6050 bfd_put_32 (abfd, BLR, p);
6051 return p + 4;
6052 }
6053
6054 static bfd_byte *
6055 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6056 {
6057 p = savefpr (abfd, p, r);
6058 bfd_put_32 (abfd, BLR, p);
6059 return p + 4;
6060 }
6061
6062 static bfd_byte *
6063 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6064 {
6065 p = restfpr (abfd, p, r);
6066 bfd_put_32 (abfd, BLR, p);
6067 return p + 4;
6068 }
6069
6070 static bfd_byte *
6071 savevr (bfd *abfd, bfd_byte *p, int r)
6072 {
6073 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6074 p = p + 4;
6075 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6076 return p + 4;
6077 }
6078
6079 static bfd_byte *
6080 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6081 {
6082 p = savevr (abfd, p, r);
6083 bfd_put_32 (abfd, BLR, p);
6084 return p + 4;
6085 }
6086
6087 static bfd_byte *
6088 restvr (bfd *abfd, bfd_byte *p, int r)
6089 {
6090 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6091 p = p + 4;
6092 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6093 return p + 4;
6094 }
6095
6096 static bfd_byte *
6097 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6098 {
6099 p = restvr (abfd, p, r);
6100 bfd_put_32 (abfd, BLR, p);
6101 return p + 4;
6102 }
6103
6104 /* Called via elf_link_hash_traverse to transfer dynamic linking
6105 information on function code symbol entries to their corresponding
6106 function descriptor symbol entries. */
6107
6108 static bfd_boolean
6109 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6110 {
6111 struct bfd_link_info *info;
6112 struct ppc_link_hash_table *htab;
6113 struct plt_entry *ent;
6114 struct ppc_link_hash_entry *fh;
6115 struct ppc_link_hash_entry *fdh;
6116 bfd_boolean force_local;
6117
6118 fh = (struct ppc_link_hash_entry *) h;
6119 if (fh->elf.root.type == bfd_link_hash_indirect)
6120 return TRUE;
6121
6122 if (fh->elf.root.type == bfd_link_hash_warning)
6123 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
6124
6125 info = inf;
6126 htab = ppc_hash_table (info);
6127
6128 /* Resolve undefined references to dot-symbols as the value
6129 in the function descriptor, if we have one in a regular object.
6130 This is to satisfy cases like ".quad .foo". Calls to functions
6131 in dynamic objects are handled elsewhere. */
6132 if (fh->elf.root.type == bfd_link_hash_undefweak
6133 && fh->was_undefined
6134 && (fdh = defined_func_desc (fh)) != NULL
6135 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6136 && opd_entry_value (fdh->elf.root.u.def.section,
6137 fdh->elf.root.u.def.value,
6138 &fh->elf.root.u.def.section,
6139 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6140 {
6141 fh->elf.root.type = fdh->elf.root.type;
6142 fh->elf.forced_local = 1;
6143 fh->elf.def_regular = fdh->elf.def_regular;
6144 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6145 }
6146
6147 /* If this is a function code symbol, transfer dynamic linking
6148 information to the function descriptor symbol. */
6149 if (!fh->is_func)
6150 return TRUE;
6151
6152 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6153 if (ent->plt.refcount > 0)
6154 break;
6155 if (ent == NULL
6156 || fh->elf.root.root.string[0] != '.'
6157 || fh->elf.root.root.string[1] == '\0')
6158 return TRUE;
6159
6160 /* Find the corresponding function descriptor symbol. Create it
6161 as undefined if necessary. */
6162
6163 fdh = lookup_fdh (fh, htab);
6164 if (fdh == NULL
6165 && !info->executable
6166 && (fh->elf.root.type == bfd_link_hash_undefined
6167 || fh->elf.root.type == bfd_link_hash_undefweak))
6168 {
6169 fdh = make_fdh (info, fh);
6170 if (fdh == NULL)
6171 return FALSE;
6172 }
6173
6174 /* Fake function descriptors are made undefweak. If the function
6175 code symbol is strong undefined, make the fake sym the same.
6176 If the function code symbol is defined, then force the fake
6177 descriptor local; We can't support overriding of symbols in a
6178 shared library on a fake descriptor. */
6179
6180 if (fdh != NULL
6181 && fdh->fake
6182 && fdh->elf.root.type == bfd_link_hash_undefweak)
6183 {
6184 if (fh->elf.root.type == bfd_link_hash_undefined)
6185 {
6186 fdh->elf.root.type = bfd_link_hash_undefined;
6187 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6188 }
6189 else if (fh->elf.root.type == bfd_link_hash_defined
6190 || fh->elf.root.type == bfd_link_hash_defweak)
6191 {
6192 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6193 }
6194 }
6195
6196 if (fdh != NULL
6197 && !fdh->elf.forced_local
6198 && (!info->executable
6199 || fdh->elf.def_dynamic
6200 || fdh->elf.ref_dynamic
6201 || (fdh->elf.root.type == bfd_link_hash_undefweak
6202 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6203 {
6204 if (fdh->elf.dynindx == -1)
6205 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6206 return FALSE;
6207 fdh->elf.ref_regular |= fh->elf.ref_regular;
6208 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6209 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6210 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6211 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6212 {
6213 move_plt_plist (fh, fdh);
6214 fdh->elf.needs_plt = 1;
6215 }
6216 fdh->is_func_descriptor = 1;
6217 fdh->oh = fh;
6218 fh->oh = fdh;
6219 }
6220
6221 /* Now that the info is on the function descriptor, clear the
6222 function code sym info. Any function code syms for which we
6223 don't have a definition in a regular file, we force local.
6224 This prevents a shared library from exporting syms that have
6225 been imported from another library. Function code syms that
6226 are really in the library we must leave global to prevent the
6227 linker dragging in a definition from a static library. */
6228 force_local = (!fh->elf.def_regular
6229 || fdh == NULL
6230 || !fdh->elf.def_regular
6231 || fdh->elf.forced_local);
6232 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6233
6234 return TRUE;
6235 }
6236
6237 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6238 this hook to a) provide some gcc support functions, and b) transfer
6239 dynamic linking information gathered so far on function code symbol
6240 entries, to their corresponding function descriptor symbol entries. */
6241
6242 static bfd_boolean
6243 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6244 struct bfd_link_info *info)
6245 {
6246 struct ppc_link_hash_table *htab;
6247 unsigned int i;
6248 const struct sfpr_def_parms funcs[] =
6249 {
6250 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6251 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6252 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6253 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6254 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6255 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6256 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6257 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6258 { "._savef", 14, 31, savefpr, savefpr1_tail },
6259 { "._restf", 14, 31, restfpr, restfpr1_tail },
6260 { "_savevr_", 20, 31, savevr, savevr_tail },
6261 { "_restvr_", 20, 31, restvr, restvr_tail }
6262 };
6263
6264 htab = ppc_hash_table (info);
6265 if (htab->sfpr == NULL)
6266 /* We don't have any relocs. */
6267 return TRUE;
6268
6269 /* Provide any missing _save* and _rest* functions. */
6270 htab->sfpr->size = 0;
6271 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6272 if (!sfpr_define (info, &funcs[i]))
6273 return FALSE;
6274
6275 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6276
6277 if (htab->sfpr->size == 0)
6278 htab->sfpr->flags |= SEC_EXCLUDE;
6279
6280 return TRUE;
6281 }
6282
6283 /* Adjust a symbol defined by a dynamic object and referenced by a
6284 regular object. The current definition is in some section of the
6285 dynamic object, but we're not including those sections. We have to
6286 change the definition to something the rest of the link can
6287 understand. */
6288
6289 static bfd_boolean
6290 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6291 struct elf_link_hash_entry *h)
6292 {
6293 struct ppc_link_hash_table *htab;
6294 asection *s;
6295
6296 htab = ppc_hash_table (info);
6297
6298 /* Deal with function syms. */
6299 if (h->type == STT_FUNC
6300 || h->type == STT_GNU_IFUNC
6301 || h->needs_plt)
6302 {
6303 /* Clear procedure linkage table information for any symbol that
6304 won't need a .plt entry. */
6305 struct plt_entry *ent;
6306 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6307 if (ent->plt.refcount > 0)
6308 break;
6309 if (ent == NULL
6310 || (h->type != STT_GNU_IFUNC
6311 && (SYMBOL_CALLS_LOCAL (info, h)
6312 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6313 && h->root.type == bfd_link_hash_undefweak))))
6314 {
6315 h->plt.plist = NULL;
6316 h->needs_plt = 0;
6317 }
6318 }
6319 else
6320 h->plt.plist = NULL;
6321
6322 /* If this is a weak symbol, and there is a real definition, the
6323 processor independent code will have arranged for us to see the
6324 real definition first, and we can just use the same value. */
6325 if (h->u.weakdef != NULL)
6326 {
6327 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6328 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6329 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6330 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6331 if (ELIMINATE_COPY_RELOCS)
6332 h->non_got_ref = h->u.weakdef->non_got_ref;
6333 return TRUE;
6334 }
6335
6336 /* If we are creating a shared library, we must presume that the
6337 only references to the symbol are via the global offset table.
6338 For such cases we need not do anything here; the relocations will
6339 be handled correctly by relocate_section. */
6340 if (info->shared)
6341 return TRUE;
6342
6343 /* If there are no references to this symbol that do not use the
6344 GOT, we don't need to generate a copy reloc. */
6345 if (!h->non_got_ref)
6346 return TRUE;
6347
6348 /* Don't generate a copy reloc for symbols defined in the executable. */
6349 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6350 return TRUE;
6351
6352 if (ELIMINATE_COPY_RELOCS)
6353 {
6354 struct ppc_link_hash_entry * eh;
6355 struct ppc_dyn_relocs *p;
6356
6357 eh = (struct ppc_link_hash_entry *) h;
6358 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6359 {
6360 s = p->sec->output_section;
6361 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6362 break;
6363 }
6364
6365 /* If we didn't find any dynamic relocs in read-only sections, then
6366 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6367 if (p == NULL)
6368 {
6369 h->non_got_ref = 0;
6370 return TRUE;
6371 }
6372 }
6373
6374 if (h->plt.plist != NULL)
6375 {
6376 /* We should never get here, but unfortunately there are versions
6377 of gcc out there that improperly (for this ABI) put initialized
6378 function pointers, vtable refs and suchlike in read-only
6379 sections. Allow them to proceed, but warn that this might
6380 break at runtime. */
6381 (*_bfd_error_handler)
6382 (_("copy reloc against `%s' requires lazy plt linking; "
6383 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6384 h->root.root.string);
6385 }
6386
6387 /* This is a reference to a symbol defined by a dynamic object which
6388 is not a function. */
6389
6390 if (h->size == 0)
6391 {
6392 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6393 h->root.root.string);
6394 return TRUE;
6395 }
6396
6397 /* We must allocate the symbol in our .dynbss section, which will
6398 become part of the .bss section of the executable. There will be
6399 an entry for this symbol in the .dynsym section. The dynamic
6400 object will contain position independent code, so all references
6401 from the dynamic object to this symbol will go through the global
6402 offset table. The dynamic linker will use the .dynsym entry to
6403 determine the address it must put in the global offset table, so
6404 both the dynamic object and the regular object will refer to the
6405 same memory location for the variable. */
6406
6407 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6408 to copy the initial value out of the dynamic object and into the
6409 runtime process image. We need to remember the offset into the
6410 .rela.bss section we are going to use. */
6411 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6412 {
6413 htab->relbss->size += sizeof (Elf64_External_Rela);
6414 h->needs_copy = 1;
6415 }
6416
6417 s = htab->dynbss;
6418
6419 return _bfd_elf_adjust_dynamic_copy (h, s);
6420 }
6421
6422 /* If given a function descriptor symbol, hide both the function code
6423 sym and the descriptor. */
6424 static void
6425 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6426 struct elf_link_hash_entry *h,
6427 bfd_boolean force_local)
6428 {
6429 struct ppc_link_hash_entry *eh;
6430 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6431
6432 eh = (struct ppc_link_hash_entry *) h;
6433 if (eh->is_func_descriptor)
6434 {
6435 struct ppc_link_hash_entry *fh = eh->oh;
6436
6437 if (fh == NULL)
6438 {
6439 const char *p, *q;
6440 struct ppc_link_hash_table *htab;
6441 char save;
6442
6443 /* We aren't supposed to use alloca in BFD because on
6444 systems which do not have alloca the version in libiberty
6445 calls xmalloc, which might cause the program to crash
6446 when it runs out of memory. This function doesn't have a
6447 return status, so there's no way to gracefully return an
6448 error. So cheat. We know that string[-1] can be safely
6449 accessed; It's either a string in an ELF string table,
6450 or allocated in an objalloc structure. */
6451
6452 p = eh->elf.root.root.string - 1;
6453 save = *p;
6454 *(char *) p = '.';
6455 htab = ppc_hash_table (info);
6456 fh = (struct ppc_link_hash_entry *)
6457 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6458 *(char *) p = save;
6459
6460 /* Unfortunately, if it so happens that the string we were
6461 looking for was allocated immediately before this string,
6462 then we overwrote the string terminator. That's the only
6463 reason the lookup should fail. */
6464 if (fh == NULL)
6465 {
6466 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6467 while (q >= eh->elf.root.root.string && *q == *p)
6468 --q, --p;
6469 if (q < eh->elf.root.root.string && *p == '.')
6470 fh = (struct ppc_link_hash_entry *)
6471 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6472 }
6473 if (fh != NULL)
6474 {
6475 eh->oh = fh;
6476 fh->oh = eh;
6477 }
6478 }
6479 if (fh != NULL)
6480 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6481 }
6482 }
6483
6484 static bfd_boolean
6485 get_sym_h (struct elf_link_hash_entry **hp,
6486 Elf_Internal_Sym **symp,
6487 asection **symsecp,
6488 char **tls_maskp,
6489 Elf_Internal_Sym **locsymsp,
6490 unsigned long r_symndx,
6491 bfd *ibfd)
6492 {
6493 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6494
6495 if (r_symndx >= symtab_hdr->sh_info)
6496 {
6497 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6498 struct elf_link_hash_entry *h;
6499
6500 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6501 h = elf_follow_link (h);
6502
6503 if (hp != NULL)
6504 *hp = h;
6505
6506 if (symp != NULL)
6507 *symp = NULL;
6508
6509 if (symsecp != NULL)
6510 {
6511 asection *symsec = NULL;
6512 if (h->root.type == bfd_link_hash_defined
6513 || h->root.type == bfd_link_hash_defweak)
6514 symsec = h->root.u.def.section;
6515 *symsecp = symsec;
6516 }
6517
6518 if (tls_maskp != NULL)
6519 {
6520 struct ppc_link_hash_entry *eh;
6521
6522 eh = (struct ppc_link_hash_entry *) h;
6523 *tls_maskp = &eh->tls_mask;
6524 }
6525 }
6526 else
6527 {
6528 Elf_Internal_Sym *sym;
6529 Elf_Internal_Sym *locsyms = *locsymsp;
6530
6531 if (locsyms == NULL)
6532 {
6533 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6534 if (locsyms == NULL)
6535 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6536 symtab_hdr->sh_info,
6537 0, NULL, NULL, NULL);
6538 if (locsyms == NULL)
6539 return FALSE;
6540 *locsymsp = locsyms;
6541 }
6542 sym = locsyms + r_symndx;
6543
6544 if (hp != NULL)
6545 *hp = NULL;
6546
6547 if (symp != NULL)
6548 *symp = sym;
6549
6550 if (symsecp != NULL)
6551 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6552
6553 if (tls_maskp != NULL)
6554 {
6555 struct got_entry **lgot_ents;
6556 char *tls_mask;
6557
6558 tls_mask = NULL;
6559 lgot_ents = elf_local_got_ents (ibfd);
6560 if (lgot_ents != NULL)
6561 {
6562 struct plt_entry **local_plt = (struct plt_entry **)
6563 (lgot_ents + symtab_hdr->sh_info);
6564 char *lgot_masks = (char *)
6565 (local_plt + symtab_hdr->sh_info);
6566 tls_mask = &lgot_masks[r_symndx];
6567 }
6568 *tls_maskp = tls_mask;
6569 }
6570 }
6571 return TRUE;
6572 }
6573
6574 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6575 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6576 type suitable for optimization, and 1 otherwise. */
6577
6578 static int
6579 get_tls_mask (char **tls_maskp,
6580 unsigned long *toc_symndx,
6581 bfd_vma *toc_addend,
6582 Elf_Internal_Sym **locsymsp,
6583 const Elf_Internal_Rela *rel,
6584 bfd *ibfd)
6585 {
6586 unsigned long r_symndx;
6587 int next_r;
6588 struct elf_link_hash_entry *h;
6589 Elf_Internal_Sym *sym;
6590 asection *sec;
6591 bfd_vma off;
6592
6593 r_symndx = ELF64_R_SYM (rel->r_info);
6594 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6595 return 0;
6596
6597 if ((*tls_maskp != NULL && **tls_maskp != 0)
6598 || sec == NULL
6599 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6600 return 1;
6601
6602 /* Look inside a TOC section too. */
6603 if (h != NULL)
6604 {
6605 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6606 off = h->root.u.def.value;
6607 }
6608 else
6609 off = sym->st_value;
6610 off += rel->r_addend;
6611 BFD_ASSERT (off % 8 == 0);
6612 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6613 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6614 if (toc_symndx != NULL)
6615 *toc_symndx = r_symndx;
6616 if (toc_addend != NULL)
6617 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6618 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6619 return 0;
6620 if ((h == NULL
6621 || ((h->root.type == bfd_link_hash_defined
6622 || h->root.type == bfd_link_hash_defweak)
6623 && !h->def_dynamic))
6624 && (next_r == -1 || next_r == -2))
6625 return 1 - next_r;
6626 return 1;
6627 }
6628
6629 /* Adjust all global syms defined in opd sections. In gcc generated
6630 code for the old ABI, these will already have been done. */
6631
6632 static bfd_boolean
6633 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6634 {
6635 struct ppc_link_hash_entry *eh;
6636 asection *sym_sec;
6637 struct _opd_sec_data *opd;
6638
6639 if (h->root.type == bfd_link_hash_indirect)
6640 return TRUE;
6641
6642 if (h->root.type == bfd_link_hash_warning)
6643 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6644
6645 if (h->root.type != bfd_link_hash_defined
6646 && h->root.type != bfd_link_hash_defweak)
6647 return TRUE;
6648
6649 eh = (struct ppc_link_hash_entry *) h;
6650 if (eh->adjust_done)
6651 return TRUE;
6652
6653 sym_sec = eh->elf.root.u.def.section;
6654 opd = get_opd_info (sym_sec);
6655 if (opd != NULL && opd->adjust != NULL)
6656 {
6657 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6658 if (adjust == -1)
6659 {
6660 /* This entry has been deleted. */
6661 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6662 if (dsec == NULL)
6663 {
6664 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6665 if (elf_discarded_section (dsec))
6666 {
6667 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6668 break;
6669 }
6670 }
6671 eh->elf.root.u.def.value = 0;
6672 eh->elf.root.u.def.section = dsec;
6673 }
6674 else
6675 eh->elf.root.u.def.value += adjust;
6676 eh->adjust_done = 1;
6677 }
6678 return TRUE;
6679 }
6680
6681 /* Handles decrementing dynamic reloc counts for the reloc specified by
6682 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6683 have already been determined. */
6684
6685 static bfd_boolean
6686 dec_dynrel_count (bfd_vma r_info,
6687 asection *sec,
6688 struct bfd_link_info *info,
6689 Elf_Internal_Sym **local_syms,
6690 struct elf_link_hash_entry *h,
6691 asection *sym_sec)
6692 {
6693 enum elf_ppc64_reloc_type r_type;
6694 struct ppc_dyn_relocs *p;
6695 struct ppc_dyn_relocs **pp;
6696
6697 /* Can this reloc be dynamic? This switch, and later tests here
6698 should be kept in sync with the code in check_relocs. */
6699 r_type = ELF64_R_TYPE (r_info);
6700 switch (r_type)
6701 {
6702 default:
6703 return TRUE;
6704
6705 case R_PPC64_TPREL16:
6706 case R_PPC64_TPREL16_LO:
6707 case R_PPC64_TPREL16_HI:
6708 case R_PPC64_TPREL16_HA:
6709 case R_PPC64_TPREL16_DS:
6710 case R_PPC64_TPREL16_LO_DS:
6711 case R_PPC64_TPREL16_HIGHER:
6712 case R_PPC64_TPREL16_HIGHERA:
6713 case R_PPC64_TPREL16_HIGHEST:
6714 case R_PPC64_TPREL16_HIGHESTA:
6715 if (!info->shared)
6716 return TRUE;
6717
6718 case R_PPC64_TPREL64:
6719 case R_PPC64_DTPMOD64:
6720 case R_PPC64_DTPREL64:
6721 case R_PPC64_ADDR64:
6722 case R_PPC64_REL30:
6723 case R_PPC64_REL32:
6724 case R_PPC64_REL64:
6725 case R_PPC64_ADDR14:
6726 case R_PPC64_ADDR14_BRNTAKEN:
6727 case R_PPC64_ADDR14_BRTAKEN:
6728 case R_PPC64_ADDR16:
6729 case R_PPC64_ADDR16_DS:
6730 case R_PPC64_ADDR16_HA:
6731 case R_PPC64_ADDR16_HI:
6732 case R_PPC64_ADDR16_HIGHER:
6733 case R_PPC64_ADDR16_HIGHERA:
6734 case R_PPC64_ADDR16_HIGHEST:
6735 case R_PPC64_ADDR16_HIGHESTA:
6736 case R_PPC64_ADDR16_LO:
6737 case R_PPC64_ADDR16_LO_DS:
6738 case R_PPC64_ADDR24:
6739 case R_PPC64_ADDR32:
6740 case R_PPC64_UADDR16:
6741 case R_PPC64_UADDR32:
6742 case R_PPC64_UADDR64:
6743 case R_PPC64_TOC:
6744 break;
6745 }
6746
6747 if (local_syms != NULL)
6748 {
6749 unsigned long r_symndx;
6750 Elf_Internal_Sym *sym;
6751 bfd *ibfd = sec->owner;
6752
6753 r_symndx = ELF64_R_SYM (r_info);
6754 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6755 return FALSE;
6756 }
6757
6758 if ((info->shared
6759 && (must_be_dyn_reloc (info, r_type)
6760 || (h != NULL
6761 && (!info->symbolic
6762 || h->root.type == bfd_link_hash_defweak
6763 || !h->def_regular))))
6764 || (ELIMINATE_COPY_RELOCS
6765 && !info->shared
6766 && h != NULL
6767 && (h->root.type == bfd_link_hash_defweak
6768 || !h->def_regular)))
6769 ;
6770 else
6771 return TRUE;
6772
6773 if (h != NULL)
6774 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6775 else
6776 {
6777 if (sym_sec != NULL)
6778 {
6779 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6780 pp = (struct ppc_dyn_relocs **) vpp;
6781 }
6782 else
6783 {
6784 void *vpp = &elf_section_data (sec)->local_dynrel;
6785 pp = (struct ppc_dyn_relocs **) vpp;
6786 }
6787
6788 /* elf_gc_sweep may have already removed all dyn relocs associated
6789 with local syms for a given section. Don't report a dynreloc
6790 miscount. */
6791 if (*pp == NULL)
6792 return TRUE;
6793 }
6794
6795 while ((p = *pp) != NULL)
6796 {
6797 if (p->sec == sec)
6798 {
6799 if (!must_be_dyn_reloc (info, r_type))
6800 p->pc_count -= 1;
6801 p->count -= 1;
6802 if (p->count == 0)
6803 *pp = p->next;
6804 return TRUE;
6805 }
6806 pp = &p->next;
6807 }
6808
6809 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6810 sec->owner, sec);
6811 bfd_set_error (bfd_error_bad_value);
6812 return FALSE;
6813 }
6814
6815 /* Remove unused Official Procedure Descriptor entries. Currently we
6816 only remove those associated with functions in discarded link-once
6817 sections, or weakly defined functions that have been overridden. It
6818 would be possible to remove many more entries for statically linked
6819 applications. */
6820
6821 bfd_boolean
6822 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6823 bfd_boolean non_overlapping)
6824 {
6825 bfd *ibfd;
6826 bfd_boolean some_edited = FALSE;
6827 asection *need_pad = NULL;
6828
6829 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6830 {
6831 asection *sec;
6832 Elf_Internal_Rela *relstart, *rel, *relend;
6833 Elf_Internal_Shdr *symtab_hdr;
6834 Elf_Internal_Sym *local_syms;
6835 struct elf_link_hash_entry **sym_hashes;
6836 bfd_vma offset;
6837 struct _opd_sec_data *opd;
6838 bfd_boolean need_edit, add_aux_fields;
6839 bfd_size_type cnt_16b = 0;
6840
6841 sec = bfd_get_section_by_name (ibfd, ".opd");
6842 if (sec == NULL || sec->size == 0)
6843 continue;
6844
6845 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6846 continue;
6847
6848 if (sec->output_section == bfd_abs_section_ptr)
6849 continue;
6850
6851 /* Look through the section relocs. */
6852 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6853 continue;
6854
6855 local_syms = NULL;
6856 symtab_hdr = &elf_symtab_hdr (ibfd);
6857 sym_hashes = elf_sym_hashes (ibfd);
6858
6859 /* Read the relocations. */
6860 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6861 info->keep_memory);
6862 if (relstart == NULL)
6863 return FALSE;
6864
6865 /* First run through the relocs to check they are sane, and to
6866 determine whether we need to edit this opd section. */
6867 need_edit = FALSE;
6868 need_pad = sec;
6869 offset = 0;
6870 relend = relstart + sec->reloc_count;
6871 for (rel = relstart; rel < relend; )
6872 {
6873 enum elf_ppc64_reloc_type r_type;
6874 unsigned long r_symndx;
6875 asection *sym_sec;
6876 struct elf_link_hash_entry *h;
6877 Elf_Internal_Sym *sym;
6878
6879 /* .opd contains a regular array of 16 or 24 byte entries. We're
6880 only interested in the reloc pointing to a function entry
6881 point. */
6882 if (rel->r_offset != offset
6883 || rel + 1 >= relend
6884 || (rel + 1)->r_offset != offset + 8)
6885 {
6886 /* If someone messes with .opd alignment then after a
6887 "ld -r" we might have padding in the middle of .opd.
6888 Also, there's nothing to prevent someone putting
6889 something silly in .opd with the assembler. No .opd
6890 optimization for them! */
6891 broken_opd:
6892 (*_bfd_error_handler)
6893 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6894 need_edit = FALSE;
6895 break;
6896 }
6897
6898 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6899 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6900 {
6901 (*_bfd_error_handler)
6902 (_("%B: unexpected reloc type %u in .opd section"),
6903 ibfd, r_type);
6904 need_edit = FALSE;
6905 break;
6906 }
6907
6908 r_symndx = ELF64_R_SYM (rel->r_info);
6909 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6910 r_symndx, ibfd))
6911 goto error_ret;
6912
6913 if (sym_sec == NULL || sym_sec->owner == NULL)
6914 {
6915 const char *sym_name;
6916 if (h != NULL)
6917 sym_name = h->root.root.string;
6918 else
6919 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6920 sym_sec);
6921
6922 (*_bfd_error_handler)
6923 (_("%B: undefined sym `%s' in .opd section"),
6924 ibfd, sym_name);
6925 need_edit = FALSE;
6926 break;
6927 }
6928
6929 /* opd entries are always for functions defined in the
6930 current input bfd. If the symbol isn't defined in the
6931 input bfd, then we won't be using the function in this
6932 bfd; It must be defined in a linkonce section in another
6933 bfd, or is weak. It's also possible that we are
6934 discarding the function due to a linker script /DISCARD/,
6935 which we test for via the output_section. */
6936 if (sym_sec->owner != ibfd
6937 || sym_sec->output_section == bfd_abs_section_ptr)
6938 need_edit = TRUE;
6939
6940 rel += 2;
6941 if (rel == relend
6942 || (rel + 1 == relend && rel->r_offset == offset + 16))
6943 {
6944 if (sec->size == offset + 24)
6945 {
6946 need_pad = NULL;
6947 break;
6948 }
6949 if (rel == relend && sec->size == offset + 16)
6950 {
6951 cnt_16b++;
6952 break;
6953 }
6954 goto broken_opd;
6955 }
6956
6957 if (rel->r_offset == offset + 24)
6958 offset += 24;
6959 else if (rel->r_offset != offset + 16)
6960 goto broken_opd;
6961 else if (rel + 1 < relend
6962 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6963 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6964 {
6965 offset += 16;
6966 cnt_16b++;
6967 }
6968 else if (rel + 2 < relend
6969 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6970 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6971 {
6972 offset += 24;
6973 rel += 1;
6974 }
6975 else
6976 goto broken_opd;
6977 }
6978
6979 add_aux_fields = non_overlapping && cnt_16b > 0;
6980
6981 if (need_edit || add_aux_fields)
6982 {
6983 Elf_Internal_Rela *write_rel;
6984 bfd_byte *rptr, *wptr;
6985 bfd_byte *new_contents;
6986 bfd_boolean skip;
6987 long opd_ent_size;
6988 bfd_size_type amt;
6989
6990 new_contents = NULL;
6991 amt = sec->size * sizeof (long) / 8;
6992 opd = &ppc64_elf_section_data (sec)->u.opd;
6993 opd->adjust = bfd_zalloc (obfd, amt);
6994 if (opd->adjust == NULL)
6995 return FALSE;
6996 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6997
6998 /* This seems a waste of time as input .opd sections are all
6999 zeros as generated by gcc, but I suppose there's no reason
7000 this will always be so. We might start putting something in
7001 the third word of .opd entries. */
7002 if ((sec->flags & SEC_IN_MEMORY) == 0)
7003 {
7004 bfd_byte *loc;
7005 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7006 {
7007 if (loc != NULL)
7008 free (loc);
7009 error_ret:
7010 if (local_syms != NULL
7011 && symtab_hdr->contents != (unsigned char *) local_syms)
7012 free (local_syms);
7013 if (elf_section_data (sec)->relocs != relstart)
7014 free (relstart);
7015 return FALSE;
7016 }
7017 sec->contents = loc;
7018 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7019 }
7020
7021 elf_section_data (sec)->relocs = relstart;
7022
7023 new_contents = sec->contents;
7024 if (add_aux_fields)
7025 {
7026 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7027 if (new_contents == NULL)
7028 return FALSE;
7029 need_pad = FALSE;
7030 }
7031 wptr = new_contents;
7032 rptr = sec->contents;
7033
7034 write_rel = relstart;
7035 skip = FALSE;
7036 offset = 0;
7037 opd_ent_size = 0;
7038 for (rel = relstart; rel < relend; rel++)
7039 {
7040 unsigned long r_symndx;
7041 asection *sym_sec;
7042 struct elf_link_hash_entry *h;
7043 Elf_Internal_Sym *sym;
7044
7045 r_symndx = ELF64_R_SYM (rel->r_info);
7046 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7047 r_symndx, ibfd))
7048 goto error_ret;
7049
7050 if (rel->r_offset == offset)
7051 {
7052 struct ppc_link_hash_entry *fdh = NULL;
7053
7054 /* See if the .opd entry is full 24 byte or
7055 16 byte (with fd_aux entry overlapped with next
7056 fd_func). */
7057 opd_ent_size = 24;
7058 if ((rel + 2 == relend && sec->size == offset + 16)
7059 || (rel + 3 < relend
7060 && rel[2].r_offset == offset + 16
7061 && rel[3].r_offset == offset + 24
7062 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7063 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7064 opd_ent_size = 16;
7065
7066 if (h != NULL
7067 && h->root.root.string[0] == '.')
7068 {
7069 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7070 ppc_hash_table (info));
7071 if (fdh != NULL
7072 && fdh->elf.root.type != bfd_link_hash_defined
7073 && fdh->elf.root.type != bfd_link_hash_defweak)
7074 fdh = NULL;
7075 }
7076
7077 skip = (sym_sec->owner != ibfd
7078 || sym_sec->output_section == bfd_abs_section_ptr);
7079 if (skip)
7080 {
7081 if (fdh != NULL && sym_sec->owner == ibfd)
7082 {
7083 /* Arrange for the function descriptor sym
7084 to be dropped. */
7085 fdh->elf.root.u.def.value = 0;
7086 fdh->elf.root.u.def.section = sym_sec;
7087 }
7088 opd->adjust[rel->r_offset / 8] = -1;
7089 }
7090 else
7091 {
7092 /* We'll be keeping this opd entry. */
7093
7094 if (fdh != NULL)
7095 {
7096 /* Redefine the function descriptor symbol to
7097 this location in the opd section. It is
7098 necessary to update the value here rather
7099 than using an array of adjustments as we do
7100 for local symbols, because various places
7101 in the generic ELF code use the value
7102 stored in u.def.value. */
7103 fdh->elf.root.u.def.value = wptr - new_contents;
7104 fdh->adjust_done = 1;
7105 }
7106
7107 /* Local syms are a bit tricky. We could
7108 tweak them as they can be cached, but
7109 we'd need to look through the local syms
7110 for the function descriptor sym which we
7111 don't have at the moment. So keep an
7112 array of adjustments. */
7113 opd->adjust[rel->r_offset / 8]
7114 = (wptr - new_contents) - (rptr - sec->contents);
7115
7116 if (wptr != rptr)
7117 memcpy (wptr, rptr, opd_ent_size);
7118 wptr += opd_ent_size;
7119 if (add_aux_fields && opd_ent_size == 16)
7120 {
7121 memset (wptr, '\0', 8);
7122 wptr += 8;
7123 }
7124 }
7125 rptr += opd_ent_size;
7126 offset += opd_ent_size;
7127 }
7128
7129 if (skip)
7130 {
7131 if (!NO_OPD_RELOCS
7132 && !info->relocatable
7133 && !dec_dynrel_count (rel->r_info, sec, info,
7134 NULL, h, sym_sec))
7135 goto error_ret;
7136 }
7137 else
7138 {
7139 /* We need to adjust any reloc offsets to point to the
7140 new opd entries. While we're at it, we may as well
7141 remove redundant relocs. */
7142 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7143 if (write_rel != rel)
7144 memcpy (write_rel, rel, sizeof (*rel));
7145 ++write_rel;
7146 }
7147 }
7148
7149 sec->size = wptr - new_contents;
7150 sec->reloc_count = write_rel - relstart;
7151 if (add_aux_fields)
7152 {
7153 free (sec->contents);
7154 sec->contents = new_contents;
7155 }
7156
7157 /* Fudge the header size too, as this is used later in
7158 elf_bfd_final_link if we are emitting relocs. */
7159 elf_section_data (sec)->rel_hdr.sh_size
7160 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
7161 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
7162 some_edited = TRUE;
7163 }
7164 else if (elf_section_data (sec)->relocs != relstart)
7165 free (relstart);
7166
7167 if (local_syms != NULL
7168 && symtab_hdr->contents != (unsigned char *) local_syms)
7169 {
7170 if (!info->keep_memory)
7171 free (local_syms);
7172 else
7173 symtab_hdr->contents = (unsigned char *) local_syms;
7174 }
7175 }
7176
7177 if (some_edited)
7178 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7179
7180 /* If we are doing a final link and the last .opd entry is just 16 byte
7181 long, add a 8 byte padding after it. */
7182 if (need_pad != NULL && !info->relocatable)
7183 {
7184 bfd_byte *p;
7185
7186 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7187 {
7188 BFD_ASSERT (need_pad->size > 0);
7189
7190 p = bfd_malloc (need_pad->size + 8);
7191 if (p == NULL)
7192 return FALSE;
7193
7194 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7195 p, 0, need_pad->size))
7196 return FALSE;
7197
7198 need_pad->contents = p;
7199 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7200 }
7201 else
7202 {
7203 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7204 if (p == NULL)
7205 return FALSE;
7206
7207 need_pad->contents = p;
7208 }
7209
7210 memset (need_pad->contents + need_pad->size, 0, 8);
7211 need_pad->size += 8;
7212 }
7213
7214 return TRUE;
7215 }
7216
7217 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7218
7219 asection *
7220 ppc64_elf_tls_setup (bfd *obfd,
7221 struct bfd_link_info *info,
7222 int no_tls_get_addr_opt)
7223 {
7224 struct ppc_link_hash_table *htab;
7225
7226 htab = ppc_hash_table (info);
7227 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7228 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7229 FALSE, FALSE, TRUE));
7230 /* Move dynamic linking info to the function descriptor sym. */
7231 if (htab->tls_get_addr != NULL)
7232 func_desc_adjust (&htab->tls_get_addr->elf, info);
7233 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7234 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7235 FALSE, FALSE, TRUE));
7236 if (!no_tls_get_addr_opt)
7237 {
7238 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7239
7240 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7241 FALSE, FALSE, TRUE);
7242 if (opt != NULL)
7243 func_desc_adjust (opt, info);
7244 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7245 FALSE, FALSE, TRUE);
7246 if (opt_fd != NULL
7247 && (opt_fd->root.type == bfd_link_hash_defined
7248 || opt_fd->root.type == bfd_link_hash_defweak))
7249 {
7250 /* If glibc supports an optimized __tls_get_addr call stub,
7251 signalled by the presence of __tls_get_addr_opt, and we'll
7252 be calling __tls_get_addr via a plt call stub, then
7253 make __tls_get_addr point to __tls_get_addr_opt. */
7254 tga_fd = &htab->tls_get_addr_fd->elf;
7255 if (htab->elf.dynamic_sections_created
7256 && tga_fd != NULL
7257 && (tga_fd->type == STT_FUNC
7258 || tga_fd->needs_plt)
7259 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7260 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7261 && tga_fd->root.type == bfd_link_hash_undefweak)))
7262 {
7263 struct plt_entry *ent;
7264
7265 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7266 if (ent->plt.refcount > 0)
7267 break;
7268 if (ent != NULL)
7269 {
7270 tga_fd->root.type = bfd_link_hash_indirect;
7271 tga_fd->root.u.i.link = &opt_fd->root;
7272 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7273 if (opt_fd->dynindx != -1)
7274 {
7275 /* Use __tls_get_addr_opt in dynamic relocations. */
7276 opt_fd->dynindx = -1;
7277 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7278 opt_fd->dynstr_index);
7279 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7280 return FALSE;
7281 }
7282 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7283 tga = &htab->tls_get_addr->elf;
7284 if (opt != NULL && tga != NULL)
7285 {
7286 tga->root.type = bfd_link_hash_indirect;
7287 tga->root.u.i.link = &opt->root;
7288 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7289 _bfd_elf_link_hash_hide_symbol (info, opt,
7290 tga->forced_local);
7291 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7292 }
7293 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7294 htab->tls_get_addr_fd->is_func_descriptor = 1;
7295 if (htab->tls_get_addr != NULL)
7296 {
7297 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7298 htab->tls_get_addr->is_func = 1;
7299 }
7300 }
7301 }
7302 }
7303 else
7304 no_tls_get_addr_opt = TRUE;
7305 }
7306 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7307 return _bfd_elf_tls_setup (obfd, info);
7308 }
7309
7310 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7311 HASH1 or HASH2. */
7312
7313 static bfd_boolean
7314 branch_reloc_hash_match (const bfd *ibfd,
7315 const Elf_Internal_Rela *rel,
7316 const struct ppc_link_hash_entry *hash1,
7317 const struct ppc_link_hash_entry *hash2)
7318 {
7319 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7320 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7321 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7322
7323 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7324 {
7325 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7326 struct elf_link_hash_entry *h;
7327
7328 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7329 h = elf_follow_link (h);
7330 if (h == &hash1->elf || h == &hash2->elf)
7331 return TRUE;
7332 }
7333 return FALSE;
7334 }
7335
7336 /* Run through all the TLS relocs looking for optimization
7337 opportunities. The linker has been hacked (see ppc64elf.em) to do
7338 a preliminary section layout so that we know the TLS segment
7339 offsets. We can't optimize earlier because some optimizations need
7340 to know the tp offset, and we need to optimize before allocating
7341 dynamic relocations. */
7342
7343 bfd_boolean
7344 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7345 {
7346 bfd *ibfd;
7347 asection *sec;
7348 struct ppc_link_hash_table *htab;
7349 int pass;
7350
7351 if (info->relocatable || !info->executable)
7352 return TRUE;
7353
7354 htab = ppc_hash_table (info);
7355 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7356 {
7357 Elf_Internal_Sym *locsyms = NULL;
7358 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7359 unsigned char *toc_ref = NULL;
7360
7361 /* Look at all the sections for this file. Make two passes over
7362 the relocs. On the first pass, mark toc entries involved
7363 with tls relocs, and check that tls relocs involved in
7364 setting up a tls_get_addr call are indeed followed by such a
7365 call. If they are not, exclude them from the optimizations
7366 done on the second pass. */
7367 for (pass = 0; pass < 2; ++pass)
7368 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7369 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7370 {
7371 Elf_Internal_Rela *relstart, *rel, *relend;
7372
7373 /* Read the relocations. */
7374 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7375 info->keep_memory);
7376 if (relstart == NULL)
7377 return FALSE;
7378
7379 relend = relstart + sec->reloc_count;
7380 for (rel = relstart; rel < relend; rel++)
7381 {
7382 enum elf_ppc64_reloc_type r_type;
7383 unsigned long r_symndx;
7384 struct elf_link_hash_entry *h;
7385 Elf_Internal_Sym *sym;
7386 asection *sym_sec;
7387 char *tls_mask;
7388 char tls_set, tls_clear, tls_type = 0;
7389 bfd_vma value;
7390 bfd_boolean ok_tprel, is_local;
7391 long toc_ref_index = 0;
7392 int expecting_tls_get_addr = 0;
7393
7394 r_symndx = ELF64_R_SYM (rel->r_info);
7395 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7396 r_symndx, ibfd))
7397 {
7398 err_free_rel:
7399 if (elf_section_data (sec)->relocs != relstart)
7400 free (relstart);
7401 if (toc_ref != NULL)
7402 free (toc_ref);
7403 if (locsyms != NULL
7404 && (elf_symtab_hdr (ibfd).contents
7405 != (unsigned char *) locsyms))
7406 free (locsyms);
7407 return FALSE;
7408 }
7409
7410 if (h != NULL)
7411 {
7412 if (h->root.type == bfd_link_hash_defined
7413 || h->root.type == bfd_link_hash_defweak)
7414 value = h->root.u.def.value;
7415 else if (h->root.type == bfd_link_hash_undefweak)
7416 value = 0;
7417 else
7418 continue;
7419 }
7420 else
7421 /* Symbols referenced by TLS relocs must be of type
7422 STT_TLS. So no need for .opd local sym adjust. */
7423 value = sym->st_value;
7424
7425 ok_tprel = FALSE;
7426 is_local = FALSE;
7427 if (h == NULL
7428 || !h->def_dynamic)
7429 {
7430 is_local = TRUE;
7431 if (h != NULL
7432 && h->root.type == bfd_link_hash_undefweak)
7433 ok_tprel = TRUE;
7434 else
7435 {
7436 value += sym_sec->output_offset;
7437 value += sym_sec->output_section->vma;
7438 value -= htab->elf.tls_sec->vma;
7439 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7440 < (bfd_vma) 1 << 32);
7441 }
7442 }
7443
7444 r_type = ELF64_R_TYPE (rel->r_info);
7445 switch (r_type)
7446 {
7447 case R_PPC64_GOT_TLSLD16:
7448 case R_PPC64_GOT_TLSLD16_LO:
7449 expecting_tls_get_addr = 1;
7450 /* Fall thru */
7451
7452 case R_PPC64_GOT_TLSLD16_HI:
7453 case R_PPC64_GOT_TLSLD16_HA:
7454 /* These relocs should never be against a symbol
7455 defined in a shared lib. Leave them alone if
7456 that turns out to be the case. */
7457 if (!is_local)
7458 continue;
7459
7460 /* LD -> LE */
7461 tls_set = 0;
7462 tls_clear = TLS_LD;
7463 tls_type = TLS_TLS | TLS_LD;
7464 break;
7465
7466 case R_PPC64_GOT_TLSGD16:
7467 case R_PPC64_GOT_TLSGD16_LO:
7468 expecting_tls_get_addr = 1;
7469 /* Fall thru */
7470
7471 case R_PPC64_GOT_TLSGD16_HI:
7472 case R_PPC64_GOT_TLSGD16_HA:
7473 if (ok_tprel)
7474 /* GD -> LE */
7475 tls_set = 0;
7476 else
7477 /* GD -> IE */
7478 tls_set = TLS_TLS | TLS_TPRELGD;
7479 tls_clear = TLS_GD;
7480 tls_type = TLS_TLS | TLS_GD;
7481 break;
7482
7483 case R_PPC64_GOT_TPREL16_DS:
7484 case R_PPC64_GOT_TPREL16_LO_DS:
7485 case R_PPC64_GOT_TPREL16_HI:
7486 case R_PPC64_GOT_TPREL16_HA:
7487 if (ok_tprel)
7488 {
7489 /* IE -> LE */
7490 tls_set = 0;
7491 tls_clear = TLS_TPREL;
7492 tls_type = TLS_TLS | TLS_TPREL;
7493 break;
7494 }
7495 continue;
7496
7497 case R_PPC64_TOC16:
7498 case R_PPC64_TOC16_LO:
7499 case R_PPC64_TLS:
7500 case R_PPC64_TLSGD:
7501 case R_PPC64_TLSLD:
7502 if (sym_sec == NULL || sym_sec != toc)
7503 continue;
7504
7505 /* Mark this toc entry as referenced by a TLS
7506 code sequence. We can do that now in the
7507 case of R_PPC64_TLS, and after checking for
7508 tls_get_addr for the TOC16 relocs. */
7509 if (toc_ref == NULL)
7510 {
7511 toc_ref = bfd_zmalloc (toc->size / 8);
7512 if (toc_ref == NULL)
7513 goto err_free_rel;
7514 }
7515 if (h != NULL)
7516 value = h->root.u.def.value;
7517 else
7518 value = sym->st_value;
7519 value += rel->r_addend;
7520 BFD_ASSERT (value < toc->size && value % 8 == 0);
7521 toc_ref_index = value / 8;
7522 if (r_type == R_PPC64_TLS
7523 || r_type == R_PPC64_TLSGD
7524 || r_type == R_PPC64_TLSLD)
7525 {
7526 toc_ref[toc_ref_index] = 1;
7527 continue;
7528 }
7529
7530 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7531 continue;
7532
7533 tls_set = 0;
7534 tls_clear = 0;
7535 expecting_tls_get_addr = 2;
7536 break;
7537
7538 case R_PPC64_TPREL64:
7539 if (pass == 0
7540 || sec != toc
7541 || toc_ref == NULL
7542 || !toc_ref[rel->r_offset / 8])
7543 continue;
7544 if (ok_tprel)
7545 {
7546 /* IE -> LE */
7547 tls_set = TLS_EXPLICIT;
7548 tls_clear = TLS_TPREL;
7549 break;
7550 }
7551 continue;
7552
7553 case R_PPC64_DTPMOD64:
7554 if (pass == 0
7555 || sec != toc
7556 || toc_ref == NULL
7557 || !toc_ref[rel->r_offset / 8])
7558 continue;
7559 if (rel + 1 < relend
7560 && (rel[1].r_info
7561 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7562 && rel[1].r_offset == rel->r_offset + 8)
7563 {
7564 if (ok_tprel)
7565 /* GD -> LE */
7566 tls_set = TLS_EXPLICIT | TLS_GD;
7567 else
7568 /* GD -> IE */
7569 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7570 tls_clear = TLS_GD;
7571 }
7572 else
7573 {
7574 if (!is_local)
7575 continue;
7576
7577 /* LD -> LE */
7578 tls_set = TLS_EXPLICIT;
7579 tls_clear = TLS_LD;
7580 }
7581 break;
7582
7583 default:
7584 continue;
7585 }
7586
7587 if (pass == 0)
7588 {
7589 if (!expecting_tls_get_addr
7590 || !sec->has_tls_get_addr_call)
7591 continue;
7592
7593 if (rel + 1 < relend
7594 && branch_reloc_hash_match (ibfd, rel + 1,
7595 htab->tls_get_addr,
7596 htab->tls_get_addr_fd))
7597 {
7598 if (expecting_tls_get_addr == 2)
7599 {
7600 /* Check for toc tls entries. */
7601 char *toc_tls;
7602 int retval;
7603
7604 retval = get_tls_mask (&toc_tls, NULL, NULL,
7605 &locsyms,
7606 rel, ibfd);
7607 if (retval == 0)
7608 goto err_free_rel;
7609 if (retval > 1 && toc_tls != NULL)
7610 toc_ref[toc_ref_index] = 1;
7611 }
7612 continue;
7613 }
7614
7615 if (expecting_tls_get_addr != 1)
7616 continue;
7617
7618 /* Uh oh, we didn't find the expected call. We
7619 could just mark this symbol to exclude it
7620 from tls optimization but it's safer to skip
7621 the entire section. */
7622 sec->has_tls_reloc = 0;
7623 break;
7624 }
7625
7626 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7627 {
7628 struct plt_entry *ent;
7629 for (ent = htab->tls_get_addr->elf.plt.plist;
7630 ent != NULL;
7631 ent = ent->next)
7632 if (ent->addend == 0)
7633 {
7634 if (ent->plt.refcount > 0)
7635 {
7636 ent->plt.refcount -= 1;
7637 expecting_tls_get_addr = 0;
7638 }
7639 break;
7640 }
7641 }
7642
7643 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7644 {
7645 struct plt_entry *ent;
7646 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7647 ent != NULL;
7648 ent = ent->next)
7649 if (ent->addend == 0)
7650 {
7651 if (ent->plt.refcount > 0)
7652 ent->plt.refcount -= 1;
7653 break;
7654 }
7655 }
7656
7657 if (tls_clear == 0)
7658 continue;
7659
7660 if ((tls_set & TLS_EXPLICIT) == 0)
7661 {
7662 struct got_entry *ent;
7663
7664 /* Adjust got entry for this reloc. */
7665 if (h != NULL)
7666 ent = h->got.glist;
7667 else
7668 ent = elf_local_got_ents (ibfd)[r_symndx];
7669
7670 for (; ent != NULL; ent = ent->next)
7671 if (ent->addend == rel->r_addend
7672 && ent->owner == ibfd
7673 && ent->tls_type == tls_type)
7674 break;
7675 if (ent == NULL)
7676 abort ();
7677
7678 if (tls_set == 0)
7679 {
7680 /* We managed to get rid of a got entry. */
7681 if (ent->got.refcount > 0)
7682 ent->got.refcount -= 1;
7683 }
7684 }
7685 else
7686 {
7687 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7688 we'll lose one or two dyn relocs. */
7689 if (!dec_dynrel_count (rel->r_info, sec, info,
7690 NULL, h, sym_sec))
7691 return FALSE;
7692
7693 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7694 {
7695 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7696 NULL, h, sym_sec))
7697 return FALSE;
7698 }
7699 }
7700
7701 *tls_mask |= tls_set;
7702 *tls_mask &= ~tls_clear;
7703 }
7704
7705 if (elf_section_data (sec)->relocs != relstart)
7706 free (relstart);
7707 }
7708
7709 if (toc_ref != NULL)
7710 free (toc_ref);
7711
7712 if (locsyms != NULL
7713 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7714 {
7715 if (!info->keep_memory)
7716 free (locsyms);
7717 else
7718 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7719 }
7720 }
7721 return TRUE;
7722 }
7723
7724 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7725 the values of any global symbols in a toc section that has been
7726 edited. Globals in toc sections should be a rarity, so this function
7727 sets a flag if any are found in toc sections other than the one just
7728 edited, so that futher hash table traversals can be avoided. */
7729
7730 struct adjust_toc_info
7731 {
7732 asection *toc;
7733 unsigned long *skip;
7734 bfd_boolean global_toc_syms;
7735 };
7736
7737 static bfd_boolean
7738 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7739 {
7740 struct ppc_link_hash_entry *eh;
7741 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7742
7743 if (h->root.type == bfd_link_hash_indirect)
7744 return TRUE;
7745
7746 if (h->root.type == bfd_link_hash_warning)
7747 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7748
7749 if (h->root.type != bfd_link_hash_defined
7750 && h->root.type != bfd_link_hash_defweak)
7751 return TRUE;
7752
7753 eh = (struct ppc_link_hash_entry *) h;
7754 if (eh->adjust_done)
7755 return TRUE;
7756
7757 if (eh->elf.root.u.def.section == toc_inf->toc)
7758 {
7759 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7760 if (skip != (unsigned long) -1)
7761 eh->elf.root.u.def.value -= skip;
7762 else
7763 {
7764 (*_bfd_error_handler)
7765 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7766 eh->elf.root.u.def.section = &bfd_abs_section;
7767 eh->elf.root.u.def.value = 0;
7768 }
7769 eh->adjust_done = 1;
7770 }
7771 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7772 toc_inf->global_toc_syms = TRUE;
7773
7774 return TRUE;
7775 }
7776
7777 /* Examine all relocs referencing .toc sections in order to remove
7778 unused .toc entries. */
7779
7780 bfd_boolean
7781 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7782 {
7783 bfd *ibfd;
7784 struct adjust_toc_info toc_inf;
7785
7786 toc_inf.global_toc_syms = TRUE;
7787 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7788 {
7789 asection *toc, *sec;
7790 Elf_Internal_Shdr *symtab_hdr;
7791 Elf_Internal_Sym *local_syms;
7792 struct elf_link_hash_entry **sym_hashes;
7793 Elf_Internal_Rela *relstart, *rel;
7794 unsigned long *skip, *drop;
7795 unsigned char *used;
7796 unsigned char *keep, last, some_unused;
7797
7798 toc = bfd_get_section_by_name (ibfd, ".toc");
7799 if (toc == NULL
7800 || toc->size == 0
7801 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7802 || elf_discarded_section (toc))
7803 continue;
7804
7805 local_syms = NULL;
7806 symtab_hdr = &elf_symtab_hdr (ibfd);
7807 sym_hashes = elf_sym_hashes (ibfd);
7808
7809 /* Look at sections dropped from the final link. */
7810 skip = NULL;
7811 relstart = NULL;
7812 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7813 {
7814 if (sec->reloc_count == 0
7815 || !elf_discarded_section (sec)
7816 || get_opd_info (sec)
7817 || (sec->flags & SEC_ALLOC) == 0
7818 || (sec->flags & SEC_DEBUGGING) != 0)
7819 continue;
7820
7821 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7822 if (relstart == NULL)
7823 goto error_ret;
7824
7825 /* Run through the relocs to see which toc entries might be
7826 unused. */
7827 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7828 {
7829 enum elf_ppc64_reloc_type r_type;
7830 unsigned long r_symndx;
7831 asection *sym_sec;
7832 struct elf_link_hash_entry *h;
7833 Elf_Internal_Sym *sym;
7834 bfd_vma val;
7835
7836 r_type = ELF64_R_TYPE (rel->r_info);
7837 switch (r_type)
7838 {
7839 default:
7840 continue;
7841
7842 case R_PPC64_TOC16:
7843 case R_PPC64_TOC16_LO:
7844 case R_PPC64_TOC16_HI:
7845 case R_PPC64_TOC16_HA:
7846 case R_PPC64_TOC16_DS:
7847 case R_PPC64_TOC16_LO_DS:
7848 break;
7849 }
7850
7851 r_symndx = ELF64_R_SYM (rel->r_info);
7852 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7853 r_symndx, ibfd))
7854 goto error_ret;
7855
7856 if (sym_sec != toc)
7857 continue;
7858
7859 if (h != NULL)
7860 val = h->root.u.def.value;
7861 else
7862 val = sym->st_value;
7863 val += rel->r_addend;
7864
7865 if (val >= toc->size)
7866 continue;
7867
7868 /* Anything in the toc ought to be aligned to 8 bytes.
7869 If not, don't mark as unused. */
7870 if (val & 7)
7871 continue;
7872
7873 if (skip == NULL)
7874 {
7875 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7876 if (skip == NULL)
7877 goto error_ret;
7878 }
7879
7880 skip[val >> 3] = 1;
7881 }
7882
7883 if (elf_section_data (sec)->relocs != relstart)
7884 free (relstart);
7885 }
7886
7887 if (skip == NULL)
7888 continue;
7889
7890 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7891 if (used == NULL)
7892 {
7893 error_ret:
7894 if (local_syms != NULL
7895 && symtab_hdr->contents != (unsigned char *) local_syms)
7896 free (local_syms);
7897 if (sec != NULL
7898 && relstart != NULL
7899 && elf_section_data (sec)->relocs != relstart)
7900 free (relstart);
7901 if (skip != NULL)
7902 free (skip);
7903 return FALSE;
7904 }
7905
7906 /* Now check all kept sections that might reference the toc.
7907 Check the toc itself last. */
7908 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7909 : ibfd->sections);
7910 sec != NULL;
7911 sec = (sec == toc ? NULL
7912 : sec->next == NULL ? toc
7913 : sec->next == toc && toc->next ? toc->next
7914 : sec->next))
7915 {
7916 int repeat;
7917
7918 if (sec->reloc_count == 0
7919 || elf_discarded_section (sec)
7920 || get_opd_info (sec)
7921 || (sec->flags & SEC_ALLOC) == 0
7922 || (sec->flags & SEC_DEBUGGING) != 0)
7923 continue;
7924
7925 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7926 if (relstart == NULL)
7927 goto error_ret;
7928
7929 /* Mark toc entries referenced as used. */
7930 repeat = 0;
7931 do
7932 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7933 {
7934 enum elf_ppc64_reloc_type r_type;
7935 unsigned long r_symndx;
7936 asection *sym_sec;
7937 struct elf_link_hash_entry *h;
7938 Elf_Internal_Sym *sym;
7939 bfd_vma val;
7940
7941 r_type = ELF64_R_TYPE (rel->r_info);
7942 switch (r_type)
7943 {
7944 case R_PPC64_TOC16:
7945 case R_PPC64_TOC16_LO:
7946 case R_PPC64_TOC16_HI:
7947 case R_PPC64_TOC16_HA:
7948 case R_PPC64_TOC16_DS:
7949 case R_PPC64_TOC16_LO_DS:
7950 /* In case we're taking addresses of toc entries. */
7951 case R_PPC64_ADDR64:
7952 break;
7953
7954 default:
7955 continue;
7956 }
7957
7958 r_symndx = ELF64_R_SYM (rel->r_info);
7959 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7960 r_symndx, ibfd))
7961 {
7962 free (used);
7963 goto error_ret;
7964 }
7965
7966 if (sym_sec != toc)
7967 continue;
7968
7969 if (h != NULL)
7970 val = h->root.u.def.value;
7971 else
7972 val = sym->st_value;
7973 val += rel->r_addend;
7974
7975 if (val >= toc->size)
7976 continue;
7977
7978 /* For the toc section, we only mark as used if
7979 this entry itself isn't unused. */
7980 if (sec == toc
7981 && !used[val >> 3]
7982 && (used[rel->r_offset >> 3]
7983 || !skip[rel->r_offset >> 3]))
7984 /* Do all the relocs again, to catch reference
7985 chains. */
7986 repeat = 1;
7987
7988 used[val >> 3] = 1;
7989 }
7990 while (repeat);
7991 }
7992
7993 /* Merge the used and skip arrays. Assume that TOC
7994 doublewords not appearing as either used or unused belong
7995 to to an entry more than one doubleword in size. */
7996 for (drop = skip, keep = used, last = 0, some_unused = 0;
7997 drop < skip + (toc->size + 7) / 8;
7998 ++drop, ++keep)
7999 {
8000 if (*keep)
8001 {
8002 *drop = 0;
8003 last = 0;
8004 }
8005 else if (*drop)
8006 {
8007 some_unused = 1;
8008 last = 1;
8009 }
8010 else
8011 *drop = last;
8012 }
8013
8014 free (used);
8015
8016 if (some_unused)
8017 {
8018 bfd_byte *contents, *src;
8019 unsigned long off;
8020
8021 /* Shuffle the toc contents, and at the same time convert the
8022 skip array from booleans into offsets. */
8023 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8024 goto error_ret;
8025
8026 elf_section_data (toc)->this_hdr.contents = contents;
8027
8028 for (src = contents, off = 0, drop = skip;
8029 src < contents + toc->size;
8030 src += 8, ++drop)
8031 {
8032 if (*drop)
8033 {
8034 *drop = (unsigned long) -1;
8035 off += 8;
8036 }
8037 else if (off != 0)
8038 {
8039 *drop = off;
8040 memcpy (src - off, src, 8);
8041 }
8042 }
8043 toc->rawsize = toc->size;
8044 toc->size = src - contents - off;
8045
8046 if (toc->reloc_count != 0)
8047 {
8048 Elf_Internal_Rela *wrel;
8049 bfd_size_type sz;
8050
8051 /* Read toc relocs. */
8052 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8053 TRUE);
8054 if (relstart == NULL)
8055 goto error_ret;
8056
8057 /* Remove unused toc relocs, and adjust those we keep. */
8058 wrel = relstart;
8059 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
8060 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
8061 {
8062 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8063 wrel->r_info = rel->r_info;
8064 wrel->r_addend = rel->r_addend;
8065 ++wrel;
8066 }
8067 else if (!dec_dynrel_count (rel->r_info, toc, info,
8068 &local_syms, NULL, NULL))
8069 goto error_ret;
8070
8071 toc->reloc_count = wrel - relstart;
8072 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
8073 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
8074 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
8075 }
8076
8077 /* Adjust addends for relocs against the toc section sym. */
8078 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8079 {
8080 if (sec->reloc_count == 0
8081 || elf_discarded_section (sec))
8082 continue;
8083
8084 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8085 TRUE);
8086 if (relstart == NULL)
8087 goto error_ret;
8088
8089 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8090 {
8091 enum elf_ppc64_reloc_type r_type;
8092 unsigned long r_symndx;
8093 asection *sym_sec;
8094 struct elf_link_hash_entry *h;
8095 Elf_Internal_Sym *sym;
8096
8097 r_type = ELF64_R_TYPE (rel->r_info);
8098 switch (r_type)
8099 {
8100 default:
8101 continue;
8102
8103 case R_PPC64_TOC16:
8104 case R_PPC64_TOC16_LO:
8105 case R_PPC64_TOC16_HI:
8106 case R_PPC64_TOC16_HA:
8107 case R_PPC64_TOC16_DS:
8108 case R_PPC64_TOC16_LO_DS:
8109 case R_PPC64_ADDR64:
8110 break;
8111 }
8112
8113 r_symndx = ELF64_R_SYM (rel->r_info);
8114 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8115 r_symndx, ibfd))
8116 goto error_ret;
8117
8118 if (sym_sec != toc || h != NULL || sym->st_value != 0)
8119 continue;
8120
8121 rel->r_addend -= skip[rel->r_addend >> 3];
8122 }
8123 }
8124
8125 /* We shouldn't have local or global symbols defined in the TOC,
8126 but handle them anyway. */
8127 if (local_syms != NULL)
8128 {
8129 Elf_Internal_Sym *sym;
8130
8131 for (sym = local_syms;
8132 sym < local_syms + symtab_hdr->sh_info;
8133 ++sym)
8134 if (sym->st_value != 0
8135 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8136 {
8137 if (skip[sym->st_value >> 3] != (unsigned long) -1)
8138 sym->st_value -= skip[sym->st_value >> 3];
8139 else
8140 {
8141 (*_bfd_error_handler)
8142 (_("%s defined in removed toc entry"),
8143 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
8144 NULL));
8145 sym->st_value = 0;
8146 sym->st_shndx = SHN_ABS;
8147 }
8148 symtab_hdr->contents = (unsigned char *) local_syms;
8149 }
8150 }
8151
8152 /* Finally, adjust any global syms defined in the toc. */
8153 if (toc_inf.global_toc_syms)
8154 {
8155 toc_inf.toc = toc;
8156 toc_inf.skip = skip;
8157 toc_inf.global_toc_syms = FALSE;
8158 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8159 &toc_inf);
8160 }
8161 }
8162
8163 if (local_syms != NULL
8164 && symtab_hdr->contents != (unsigned char *) local_syms)
8165 {
8166 if (!info->keep_memory)
8167 free (local_syms);
8168 else
8169 symtab_hdr->contents = (unsigned char *) local_syms;
8170 }
8171 free (skip);
8172 }
8173
8174 return TRUE;
8175 }
8176
8177 /* Allocate space in .plt, .got and associated reloc sections for
8178 dynamic relocs. */
8179
8180 static bfd_boolean
8181 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8182 {
8183 struct bfd_link_info *info;
8184 struct ppc_link_hash_table *htab;
8185 asection *s;
8186 struct ppc_link_hash_entry *eh;
8187 struct ppc_dyn_relocs *p;
8188 struct got_entry *gent;
8189
8190 if (h->root.type == bfd_link_hash_indirect)
8191 return TRUE;
8192
8193 if (h->root.type == bfd_link_hash_warning)
8194 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8195
8196 info = (struct bfd_link_info *) inf;
8197 htab = ppc_hash_table (info);
8198
8199 if ((htab->elf.dynamic_sections_created
8200 && h->dynindx != -1
8201 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8202 || h->type == STT_GNU_IFUNC)
8203 {
8204 struct plt_entry *pent;
8205 bfd_boolean doneone = FALSE;
8206 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8207 if (pent->plt.refcount > 0)
8208 {
8209 if (!htab->elf.dynamic_sections_created
8210 || h->dynindx == -1)
8211 {
8212 s = htab->iplt;
8213 pent->plt.offset = s->size;
8214 s->size += PLT_ENTRY_SIZE;
8215 s = htab->reliplt;
8216 }
8217 else
8218 {
8219 /* If this is the first .plt entry, make room for the special
8220 first entry. */
8221 s = htab->plt;
8222 if (s->size == 0)
8223 s->size += PLT_INITIAL_ENTRY_SIZE;
8224
8225 pent->plt.offset = s->size;
8226
8227 /* Make room for this entry. */
8228 s->size += PLT_ENTRY_SIZE;
8229
8230 /* Make room for the .glink code. */
8231 s = htab->glink;
8232 if (s->size == 0)
8233 s->size += GLINK_CALL_STUB_SIZE;
8234 /* We need bigger stubs past index 32767. */
8235 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8236 s->size += 4;
8237 s->size += 2*4;
8238
8239 /* We also need to make an entry in the .rela.plt section. */
8240 s = htab->relplt;
8241 }
8242 s->size += sizeof (Elf64_External_Rela);
8243 doneone = TRUE;
8244 }
8245 else
8246 pent->plt.offset = (bfd_vma) -1;
8247 if (!doneone)
8248 {
8249 h->plt.plist = NULL;
8250 h->needs_plt = 0;
8251 }
8252 }
8253 else
8254 {
8255 h->plt.plist = NULL;
8256 h->needs_plt = 0;
8257 }
8258
8259 eh = (struct ppc_link_hash_entry *) h;
8260 /* Run through the TLS GD got entries first if we're changing them
8261 to TPREL. */
8262 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8263 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8264 if (gent->got.refcount > 0
8265 && (gent->tls_type & TLS_GD) != 0)
8266 {
8267 /* This was a GD entry that has been converted to TPREL. If
8268 there happens to be a TPREL entry we can use that one. */
8269 struct got_entry *ent;
8270 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8271 if (ent->got.refcount > 0
8272 && (ent->tls_type & TLS_TPREL) != 0
8273 && ent->addend == gent->addend
8274 && ent->owner == gent->owner)
8275 {
8276 gent->got.refcount = 0;
8277 break;
8278 }
8279
8280 /* If not, then we'll be using our own TPREL entry. */
8281 if (gent->got.refcount != 0)
8282 gent->tls_type = TLS_TLS | TLS_TPREL;
8283 }
8284
8285 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8286 if (gent->got.refcount > 0)
8287 {
8288 bfd_boolean dyn;
8289 asection *rsec;
8290
8291 /* Make sure this symbol is output as a dynamic symbol.
8292 Undefined weak syms won't yet be marked as dynamic,
8293 nor will all TLS symbols. */
8294 if (h->dynindx == -1
8295 && !h->forced_local
8296 && h->type != STT_GNU_IFUNC
8297 && htab->elf.dynamic_sections_created)
8298 {
8299 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8300 return FALSE;
8301 }
8302
8303 if ((gent->tls_type & TLS_LD) != 0
8304 && !h->def_dynamic)
8305 {
8306 ppc64_tlsld_got (gent->owner)->refcount += 1;
8307 gent->got.offset = (bfd_vma) -1;
8308 continue;
8309 }
8310
8311 if (!is_ppc64_elf (gent->owner))
8312 continue;
8313
8314 s = ppc64_elf_tdata (gent->owner)->got;
8315 gent->got.offset = s->size;
8316 s->size
8317 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
8318 dyn = htab->elf.dynamic_sections_created;
8319 rsec = NULL;
8320 if ((info->shared
8321 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8322 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8323 || h->root.type != bfd_link_hash_undefweak))
8324 rsec = ppc64_elf_tdata (gent->owner)->relgot;
8325 else if (h->type == STT_GNU_IFUNC)
8326 rsec = htab->reliplt;
8327 if (rsec != NULL)
8328 rsec->size += (gent->tls_type & eh->tls_mask & TLS_GD
8329 ? 2 * sizeof (Elf64_External_Rela)
8330 : sizeof (Elf64_External_Rela));
8331 }
8332 else
8333 gent->got.offset = (bfd_vma) -1;
8334
8335 if (eh->dyn_relocs == NULL
8336 || (!htab->elf.dynamic_sections_created
8337 && h->type != STT_GNU_IFUNC))
8338 return TRUE;
8339
8340 /* In the shared -Bsymbolic case, discard space allocated for
8341 dynamic pc-relative relocs against symbols which turn out to be
8342 defined in regular objects. For the normal shared case, discard
8343 space for relocs that have become local due to symbol visibility
8344 changes. */
8345
8346 if (info->shared)
8347 {
8348 /* Relocs that use pc_count are those that appear on a call insn,
8349 or certain REL relocs (see must_be_dyn_reloc) that can be
8350 generated via assembly. We want calls to protected symbols to
8351 resolve directly to the function rather than going via the plt.
8352 If people want function pointer comparisons to work as expected
8353 then they should avoid writing weird assembly. */
8354 if (SYMBOL_CALLS_LOCAL (info, h))
8355 {
8356 struct ppc_dyn_relocs **pp;
8357
8358 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8359 {
8360 p->count -= p->pc_count;
8361 p->pc_count = 0;
8362 if (p->count == 0)
8363 *pp = p->next;
8364 else
8365 pp = &p->next;
8366 }
8367 }
8368
8369 /* Also discard relocs on undefined weak syms with non-default
8370 visibility. */
8371 if (eh->dyn_relocs != NULL
8372 && h->root.type == bfd_link_hash_undefweak)
8373 {
8374 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8375 eh->dyn_relocs = NULL;
8376
8377 /* Make sure this symbol is output as a dynamic symbol.
8378 Undefined weak syms won't yet be marked as dynamic. */
8379 else if (h->dynindx == -1
8380 && !h->forced_local)
8381 {
8382 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8383 return FALSE;
8384 }
8385 }
8386 }
8387 else if (h->type == STT_GNU_IFUNC)
8388 {
8389 if (!h->non_got_ref)
8390 eh->dyn_relocs = NULL;
8391 }
8392 else if (ELIMINATE_COPY_RELOCS)
8393 {
8394 /* For the non-shared case, discard space for relocs against
8395 symbols which turn out to need copy relocs or are not
8396 dynamic. */
8397
8398 if (!h->non_got_ref
8399 && !h->def_regular)
8400 {
8401 /* Make sure this symbol is output as a dynamic symbol.
8402 Undefined weak syms won't yet be marked as dynamic. */
8403 if (h->dynindx == -1
8404 && !h->forced_local)
8405 {
8406 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8407 return FALSE;
8408 }
8409
8410 /* If that succeeded, we know we'll be keeping all the
8411 relocs. */
8412 if (h->dynindx != -1)
8413 goto keep;
8414 }
8415
8416 eh->dyn_relocs = NULL;
8417
8418 keep: ;
8419 }
8420
8421 /* Finally, allocate space. */
8422 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8423 {
8424 asection *sreloc = elf_section_data (p->sec)->sreloc;
8425 if (!htab->elf.dynamic_sections_created)
8426 sreloc = htab->reliplt;
8427 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8428 }
8429
8430 return TRUE;
8431 }
8432
8433 /* Find any dynamic relocs that apply to read-only sections. */
8434
8435 static bfd_boolean
8436 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8437 {
8438 struct ppc_link_hash_entry *eh;
8439 struct ppc_dyn_relocs *p;
8440
8441 if (h->root.type == bfd_link_hash_warning)
8442 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8443
8444 eh = (struct ppc_link_hash_entry *) h;
8445 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8446 {
8447 asection *s = p->sec->output_section;
8448
8449 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8450 {
8451 struct bfd_link_info *info = inf;
8452
8453 info->flags |= DF_TEXTREL;
8454
8455 /* Not an error, just cut short the traversal. */
8456 return FALSE;
8457 }
8458 }
8459 return TRUE;
8460 }
8461
8462 /* Set the sizes of the dynamic sections. */
8463
8464 static bfd_boolean
8465 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8466 struct bfd_link_info *info)
8467 {
8468 struct ppc_link_hash_table *htab;
8469 bfd *dynobj;
8470 asection *s;
8471 bfd_boolean relocs;
8472 bfd *ibfd;
8473
8474 htab = ppc_hash_table (info);
8475 dynobj = htab->elf.dynobj;
8476 if (dynobj == NULL)
8477 abort ();
8478
8479 if (htab->elf.dynamic_sections_created)
8480 {
8481 /* Set the contents of the .interp section to the interpreter. */
8482 if (info->executable)
8483 {
8484 s = bfd_get_section_by_name (dynobj, ".interp");
8485 if (s == NULL)
8486 abort ();
8487 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8488 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8489 }
8490 }
8491
8492 /* Set up .got offsets for local syms, and space for local dynamic
8493 relocs. */
8494 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8495 {
8496 struct got_entry **lgot_ents;
8497 struct got_entry **end_lgot_ents;
8498 struct plt_entry **local_plt;
8499 struct plt_entry **end_local_plt;
8500 char *lgot_masks;
8501 bfd_size_type locsymcount;
8502 Elf_Internal_Shdr *symtab_hdr;
8503 asection *srel;
8504
8505 if (!is_ppc64_elf (ibfd))
8506 continue;
8507
8508 for (s = ibfd->sections; s != NULL; s = s->next)
8509 {
8510 struct ppc_dyn_relocs *p;
8511
8512 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8513 {
8514 if (!bfd_is_abs_section (p->sec)
8515 && bfd_is_abs_section (p->sec->output_section))
8516 {
8517 /* Input section has been discarded, either because
8518 it is a copy of a linkonce section or due to
8519 linker script /DISCARD/, so we'll be discarding
8520 the relocs too. */
8521 }
8522 else if (p->count != 0)
8523 {
8524 srel = elf_section_data (p->sec)->sreloc;
8525 if (!htab->elf.dynamic_sections_created)
8526 srel = htab->reliplt;
8527 srel->size += p->count * sizeof (Elf64_External_Rela);
8528 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8529 info->flags |= DF_TEXTREL;
8530 }
8531 }
8532 }
8533
8534 lgot_ents = elf_local_got_ents (ibfd);
8535 if (!lgot_ents)
8536 continue;
8537
8538 symtab_hdr = &elf_symtab_hdr (ibfd);
8539 locsymcount = symtab_hdr->sh_info;
8540 end_lgot_ents = lgot_ents + locsymcount;
8541 local_plt = (struct plt_entry **) end_lgot_ents;
8542 end_local_plt = local_plt + locsymcount;
8543 lgot_masks = (char *) end_local_plt;
8544 s = ppc64_elf_tdata (ibfd)->got;
8545 srel = ppc64_elf_tdata (ibfd)->relgot;
8546 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8547 {
8548 struct got_entry *ent;
8549
8550 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8551 if (ent->got.refcount > 0)
8552 {
8553 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8554 {
8555 ppc64_tlsld_got (ibfd)->refcount += 1;
8556 ent->got.offset = (bfd_vma) -1;
8557 }
8558 else
8559 {
8560 unsigned int num = 1;
8561 ent->got.offset = s->size;
8562 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8563 num = 2;
8564 s->size += num * 8;
8565 if (info->shared)
8566 srel->size += num * sizeof (Elf64_External_Rela);
8567 else if ((*lgot_masks & PLT_IFUNC) != 0)
8568 htab->reliplt->size += num * sizeof (Elf64_External_Rela);
8569 }
8570 }
8571 else
8572 ent->got.offset = (bfd_vma) -1;
8573 }
8574
8575 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8576 for (; local_plt < end_local_plt; ++local_plt)
8577 {
8578 struct plt_entry *ent;
8579
8580 for (ent = *local_plt; ent != NULL; ent = ent->next)
8581 if (ent->plt.refcount > 0)
8582 {
8583 s = htab->iplt;
8584 ent->plt.offset = s->size;
8585 s->size += PLT_ENTRY_SIZE;
8586
8587 htab->reliplt->size += sizeof (Elf64_External_Rela);
8588 }
8589 else
8590 ent->plt.offset = (bfd_vma) -1;
8591 }
8592 }
8593
8594 /* Allocate global sym .plt and .got entries, and space for global
8595 sym dynamic relocs. */
8596 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8597
8598 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8599 {
8600 if (!is_ppc64_elf (ibfd))
8601 continue;
8602
8603 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8604 {
8605 s = ppc64_elf_tdata (ibfd)->got;
8606 ppc64_tlsld_got (ibfd)->offset = s->size;
8607 s->size += 16;
8608 if (info->shared)
8609 {
8610 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8611 srel->size += sizeof (Elf64_External_Rela);
8612 }
8613 }
8614 else
8615 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8616 }
8617
8618 /* We now have determined the sizes of the various dynamic sections.
8619 Allocate memory for them. */
8620 relocs = FALSE;
8621 for (s = dynobj->sections; s != NULL; s = s->next)
8622 {
8623 if ((s->flags & SEC_LINKER_CREATED) == 0)
8624 continue;
8625
8626 if (s == htab->brlt || s == htab->relbrlt)
8627 /* These haven't been allocated yet; don't strip. */
8628 continue;
8629 else if (s == htab->got
8630 || s == htab->plt
8631 || s == htab->iplt
8632 || s == htab->glink
8633 || s == htab->dynbss)
8634 {
8635 /* Strip this section if we don't need it; see the
8636 comment below. */
8637 }
8638 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8639 {
8640 if (s->size != 0)
8641 {
8642 if (s != htab->relplt)
8643 relocs = TRUE;
8644
8645 /* We use the reloc_count field as a counter if we need
8646 to copy relocs into the output file. */
8647 s->reloc_count = 0;
8648 }
8649 }
8650 else
8651 {
8652 /* It's not one of our sections, so don't allocate space. */
8653 continue;
8654 }
8655
8656 if (s->size == 0)
8657 {
8658 /* If we don't need this section, strip it from the
8659 output file. This is mostly to handle .rela.bss and
8660 .rela.plt. We must create both sections in
8661 create_dynamic_sections, because they must be created
8662 before the linker maps input sections to output
8663 sections. The linker does that before
8664 adjust_dynamic_symbol is called, and it is that
8665 function which decides whether anything needs to go
8666 into these sections. */
8667 s->flags |= SEC_EXCLUDE;
8668 continue;
8669 }
8670
8671 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8672 continue;
8673
8674 /* Allocate memory for the section contents. We use bfd_zalloc
8675 here in case unused entries are not reclaimed before the
8676 section's contents are written out. This should not happen,
8677 but this way if it does we get a R_PPC64_NONE reloc in .rela
8678 sections instead of garbage.
8679 We also rely on the section contents being zero when writing
8680 the GOT. */
8681 s->contents = bfd_zalloc (dynobj, s->size);
8682 if (s->contents == NULL)
8683 return FALSE;
8684 }
8685
8686 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8687 {
8688 if (!is_ppc64_elf (ibfd))
8689 continue;
8690
8691 s = ppc64_elf_tdata (ibfd)->got;
8692 if (s != NULL && s != htab->got)
8693 {
8694 if (s->size == 0)
8695 s->flags |= SEC_EXCLUDE;
8696 else
8697 {
8698 s->contents = bfd_zalloc (ibfd, s->size);
8699 if (s->contents == NULL)
8700 return FALSE;
8701 }
8702 }
8703 s = ppc64_elf_tdata (ibfd)->relgot;
8704 if (s != NULL)
8705 {
8706 if (s->size == 0)
8707 s->flags |= SEC_EXCLUDE;
8708 else
8709 {
8710 s->contents = bfd_zalloc (ibfd, s->size);
8711 if (s->contents == NULL)
8712 return FALSE;
8713 relocs = TRUE;
8714 s->reloc_count = 0;
8715 }
8716 }
8717 }
8718
8719 if (htab->elf.dynamic_sections_created)
8720 {
8721 /* Add some entries to the .dynamic section. We fill in the
8722 values later, in ppc64_elf_finish_dynamic_sections, but we
8723 must add the entries now so that we get the correct size for
8724 the .dynamic section. The DT_DEBUG entry is filled in by the
8725 dynamic linker and used by the debugger. */
8726 #define add_dynamic_entry(TAG, VAL) \
8727 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8728
8729 if (info->executable)
8730 {
8731 if (!add_dynamic_entry (DT_DEBUG, 0))
8732 return FALSE;
8733 }
8734
8735 if (htab->plt != NULL && htab->plt->size != 0)
8736 {
8737 if (!add_dynamic_entry (DT_PLTGOT, 0)
8738 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8739 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8740 || !add_dynamic_entry (DT_JMPREL, 0)
8741 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8742 return FALSE;
8743 }
8744
8745 if (NO_OPD_RELOCS)
8746 {
8747 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8748 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8749 return FALSE;
8750 }
8751
8752 if (!htab->no_tls_get_addr_opt
8753 && htab->tls_get_addr_fd != NULL
8754 && htab->tls_get_addr_fd->elf.plt.plist != NULL
8755 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
8756 return FALSE;
8757
8758 if (relocs)
8759 {
8760 if (!add_dynamic_entry (DT_RELA, 0)
8761 || !add_dynamic_entry (DT_RELASZ, 0)
8762 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8763 return FALSE;
8764
8765 /* If any dynamic relocs apply to a read-only section,
8766 then we need a DT_TEXTREL entry. */
8767 if ((info->flags & DF_TEXTREL) == 0)
8768 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8769
8770 if ((info->flags & DF_TEXTREL) != 0)
8771 {
8772 if (!add_dynamic_entry (DT_TEXTREL, 0))
8773 return FALSE;
8774 }
8775 }
8776 }
8777 #undef add_dynamic_entry
8778
8779 return TRUE;
8780 }
8781
8782 /* Determine the type of stub needed, if any, for a call. */
8783
8784 static inline enum ppc_stub_type
8785 ppc_type_of_stub (asection *input_sec,
8786 const Elf_Internal_Rela *rel,
8787 struct ppc_link_hash_entry **hash,
8788 struct plt_entry **plt_ent,
8789 bfd_vma destination)
8790 {
8791 struct ppc_link_hash_entry *h = *hash;
8792 bfd_vma location;
8793 bfd_vma branch_offset;
8794 bfd_vma max_branch_offset;
8795 enum elf_ppc64_reloc_type r_type;
8796
8797 if (h != NULL)
8798 {
8799 struct plt_entry *ent;
8800 struct ppc_link_hash_entry *fdh = h;
8801 if (h->oh != NULL
8802 && h->oh->is_func_descriptor)
8803 fdh = ppc_follow_link (h->oh);
8804
8805 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8806 if (ent->addend == rel->r_addend
8807 && ent->plt.offset != (bfd_vma) -1)
8808 {
8809 *hash = fdh;
8810 *plt_ent = ent;
8811 return ppc_stub_plt_call;
8812 }
8813
8814 /* Here, we know we don't have a plt entry. If we don't have a
8815 either a defined function descriptor or a defined entry symbol
8816 in a regular object file, then it is pointless trying to make
8817 any other type of stub. */
8818 if (!((fdh->elf.root.type == bfd_link_hash_defined
8819 || fdh->elf.root.type == bfd_link_hash_defweak)
8820 && fdh->elf.root.u.def.section->output_section != NULL)
8821 && !((h->elf.root.type == bfd_link_hash_defined
8822 || h->elf.root.type == bfd_link_hash_defweak)
8823 && h->elf.root.u.def.section->output_section != NULL))
8824 return ppc_stub_none;
8825 }
8826 else if (elf_local_got_ents (input_sec->owner) != NULL)
8827 {
8828 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
8829 struct plt_entry **local_plt = (struct plt_entry **)
8830 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
8831 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
8832
8833 if (local_plt[r_symndx] != NULL)
8834 {
8835 struct plt_entry *ent;
8836
8837 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
8838 if (ent->addend == rel->r_addend
8839 && ent->plt.offset != (bfd_vma) -1)
8840 {
8841 *plt_ent = ent;
8842 return ppc_stub_plt_call;
8843 }
8844 }
8845 }
8846
8847 /* Determine where the call point is. */
8848 location = (input_sec->output_offset
8849 + input_sec->output_section->vma
8850 + rel->r_offset);
8851
8852 branch_offset = destination - location;
8853 r_type = ELF64_R_TYPE (rel->r_info);
8854
8855 /* Determine if a long branch stub is needed. */
8856 max_branch_offset = 1 << 25;
8857 if (r_type != R_PPC64_REL24)
8858 max_branch_offset = 1 << 15;
8859
8860 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8861 /* We need a stub. Figure out whether a long_branch or plt_branch
8862 is needed later. */
8863 return ppc_stub_long_branch;
8864
8865 return ppc_stub_none;
8866 }
8867
8868 /* Build a .plt call stub. */
8869
8870 static inline bfd_byte *
8871 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8872 {
8873 #define PPC_LO(v) ((v) & 0xffff)
8874 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8875 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8876
8877 if (PPC_HA (offset) != 0)
8878 {
8879 if (r != NULL)
8880 {
8881 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8882 r[1].r_offset = r[0].r_offset + 8;
8883 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8884 r[1].r_addend = r[0].r_addend;
8885 if (PPC_HA (offset + 16) != PPC_HA (offset))
8886 {
8887 r[2].r_offset = r[1].r_offset + 4;
8888 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8889 r[2].r_addend = r[0].r_addend;
8890 }
8891 else
8892 {
8893 r[2].r_offset = r[1].r_offset + 8;
8894 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8895 r[2].r_addend = r[0].r_addend + 8;
8896 r[3].r_offset = r[2].r_offset + 4;
8897 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8898 r[3].r_addend = r[0].r_addend + 16;
8899 }
8900 }
8901 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8902 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8903 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8904 if (PPC_HA (offset + 16) != PPC_HA (offset))
8905 {
8906 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8907 offset = 0;
8908 }
8909 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8910 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8911 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8912 bfd_put_32 (obfd, BCTR, p), p += 4;
8913 }
8914 else
8915 {
8916 if (r != NULL)
8917 {
8918 r[0].r_offset += 4;
8919 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8920 if (PPC_HA (offset + 16) != PPC_HA (offset))
8921 {
8922 r[1].r_offset = r[0].r_offset + 4;
8923 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8924 r[1].r_addend = r[0].r_addend;
8925 }
8926 else
8927 {
8928 r[1].r_offset = r[0].r_offset + 8;
8929 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8930 r[1].r_addend = r[0].r_addend + 16;
8931 r[2].r_offset = r[1].r_offset + 4;
8932 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8933 r[2].r_addend = r[0].r_addend + 8;
8934 }
8935 }
8936 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8937 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8938 if (PPC_HA (offset + 16) != PPC_HA (offset))
8939 {
8940 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8941 offset = 0;
8942 }
8943 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8944 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8945 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8946 bfd_put_32 (obfd, BCTR, p), p += 4;
8947 }
8948 return p;
8949 }
8950
8951 /* Build a special .plt call stub for __tls_get_addr. */
8952
8953 #define LD_R11_0R3 0xe9630000
8954 #define LD_R12_0R3 0xe9830000
8955 #define MR_R0_R3 0x7c601b78
8956 #define CMPDI_R11_0 0x2c2b0000
8957 #define ADD_R3_R12_R13 0x7c6c6a14
8958 #define BEQLR 0x4d820020
8959 #define MR_R3_R0 0x7c030378
8960 #define MFLR_R11 0x7d6802a6
8961 #define STD_R11_0R1 0xf9610000
8962 #define BCTRL 0x4e800421
8963 #define LD_R11_0R1 0xe9610000
8964 #define LD_R2_0R1 0xe8410000
8965 #define MTLR_R11 0x7d6803a6
8966
8967 static inline bfd_byte *
8968 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
8969 Elf_Internal_Rela *r)
8970 {
8971 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
8972 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
8973 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
8974 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
8975 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
8976 bfd_put_32 (obfd, BEQLR, p), p += 4;
8977 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
8978 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
8979 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
8980
8981 if (r != NULL)
8982 r[0].r_offset += 9 * 4;
8983 p = build_plt_stub (obfd, p, offset, r);
8984 bfd_put_32 (obfd, BCTRL, p - 4);
8985
8986 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
8987 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
8988 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
8989 bfd_put_32 (obfd, BLR, p), p += 4;
8990
8991 return p;
8992 }
8993
8994 static Elf_Internal_Rela *
8995 get_relocs (asection *sec, int count)
8996 {
8997 Elf_Internal_Rela *relocs;
8998 struct bfd_elf_section_data *elfsec_data;
8999
9000 elfsec_data = elf_section_data (sec);
9001 relocs = elfsec_data->relocs;
9002 if (relocs == NULL)
9003 {
9004 bfd_size_type relsize;
9005 relsize = sec->reloc_count * sizeof (*relocs);
9006 relocs = bfd_alloc (sec->owner, relsize);
9007 if (relocs == NULL)
9008 return NULL;
9009 elfsec_data->relocs = relocs;
9010 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
9011 * sizeof (Elf64_External_Rela));
9012 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
9013 sec->reloc_count = 0;
9014 }
9015 relocs += sec->reloc_count;
9016 sec->reloc_count += count;
9017 return relocs;
9018 }
9019
9020 static bfd_boolean
9021 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9022 {
9023 struct ppc_stub_hash_entry *stub_entry;
9024 struct ppc_branch_hash_entry *br_entry;
9025 struct bfd_link_info *info;
9026 struct ppc_link_hash_table *htab;
9027 bfd_byte *loc;
9028 bfd_byte *p;
9029 bfd_vma dest, off;
9030 int size;
9031 Elf_Internal_Rela *r;
9032 asection *plt;
9033
9034 /* Massage our args to the form they really have. */
9035 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9036 info = in_arg;
9037
9038 htab = ppc_hash_table (info);
9039
9040 /* Make a note of the offset within the stubs for this entry. */
9041 stub_entry->stub_offset = stub_entry->stub_sec->size;
9042 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9043
9044 htab->stub_count[stub_entry->stub_type - 1] += 1;
9045 switch (stub_entry->stub_type)
9046 {
9047 case ppc_stub_long_branch:
9048 case ppc_stub_long_branch_r2off:
9049 /* Branches are relative. This is where we are going to. */
9050 off = dest = (stub_entry->target_value
9051 + stub_entry->target_section->output_offset
9052 + stub_entry->target_section->output_section->vma);
9053
9054 /* And this is where we are coming from. */
9055 off -= (stub_entry->stub_offset
9056 + stub_entry->stub_sec->output_offset
9057 + stub_entry->stub_sec->output_section->vma);
9058
9059 size = 4;
9060 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9061 {
9062 bfd_vma r2off;
9063
9064 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9065 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9066 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9067 loc += 4;
9068 size = 12;
9069 if (PPC_HA (r2off) != 0)
9070 {
9071 size = 16;
9072 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9073 loc += 4;
9074 }
9075 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9076 loc += 4;
9077 off -= size - 4;
9078 }
9079 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9080
9081 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9082 {
9083 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
9084 stub_entry->root.string);
9085 htab->stub_error = TRUE;
9086 return FALSE;
9087 }
9088
9089 if (info->emitrelocations)
9090 {
9091 r = get_relocs (stub_entry->stub_sec, 1);
9092 if (r == NULL)
9093 return FALSE;
9094 r->r_offset = loc - stub_entry->stub_sec->contents;
9095 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9096 r->r_addend = dest;
9097 if (stub_entry->h != NULL)
9098 {
9099 struct elf_link_hash_entry **hashes;
9100 unsigned long symndx;
9101 struct ppc_link_hash_entry *h;
9102
9103 hashes = elf_sym_hashes (htab->stub_bfd);
9104 if (hashes == NULL)
9105 {
9106 bfd_size_type hsize;
9107
9108 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9109 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9110 if (hashes == NULL)
9111 return FALSE;
9112 elf_sym_hashes (htab->stub_bfd) = hashes;
9113 htab->stub_globals = 1;
9114 }
9115 symndx = htab->stub_globals++;
9116 h = stub_entry->h;
9117 hashes[symndx] = &h->elf;
9118 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9119 if (h->oh != NULL && h->oh->is_func)
9120 h = ppc_follow_link (h->oh);
9121 if (h->elf.root.u.def.section != stub_entry->target_section)
9122 /* H is an opd symbol. The addend must be zero. */
9123 r->r_addend = 0;
9124 else
9125 {
9126 off = (h->elf.root.u.def.value
9127 + h->elf.root.u.def.section->output_offset
9128 + h->elf.root.u.def.section->output_section->vma);
9129 r->r_addend -= off;
9130 }
9131 }
9132 }
9133 break;
9134
9135 case ppc_stub_plt_branch:
9136 case ppc_stub_plt_branch_r2off:
9137 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9138 stub_entry->root.string + 9,
9139 FALSE, FALSE);
9140 if (br_entry == NULL)
9141 {
9142 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
9143 stub_entry->root.string);
9144 htab->stub_error = TRUE;
9145 return FALSE;
9146 }
9147
9148 dest = (stub_entry->target_value
9149 + stub_entry->target_section->output_offset
9150 + stub_entry->target_section->output_section->vma);
9151
9152 bfd_put_64 (htab->brlt->owner, dest,
9153 htab->brlt->contents + br_entry->offset);
9154
9155 if (br_entry->iter == htab->stub_iteration)
9156 {
9157 br_entry->iter = 0;
9158
9159 if (htab->relbrlt != NULL)
9160 {
9161 /* Create a reloc for the branch lookup table entry. */
9162 Elf_Internal_Rela rela;
9163 bfd_byte *rl;
9164
9165 rela.r_offset = (br_entry->offset
9166 + htab->brlt->output_offset
9167 + htab->brlt->output_section->vma);
9168 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9169 rela.r_addend = dest;
9170
9171 rl = htab->relbrlt->contents;
9172 rl += (htab->relbrlt->reloc_count++
9173 * sizeof (Elf64_External_Rela));
9174 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9175 }
9176 else if (info->emitrelocations)
9177 {
9178 r = get_relocs (htab->brlt, 1);
9179 if (r == NULL)
9180 return FALSE;
9181 /* brlt, being SEC_LINKER_CREATED does not go through the
9182 normal reloc processing. Symbols and offsets are not
9183 translated from input file to output file form, so
9184 set up the offset per the output file. */
9185 r->r_offset = (br_entry->offset
9186 + htab->brlt->output_offset
9187 + htab->brlt->output_section->vma);
9188 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9189 r->r_addend = dest;
9190 }
9191 }
9192
9193 dest = (br_entry->offset
9194 + htab->brlt->output_offset
9195 + htab->brlt->output_section->vma);
9196
9197 off = (dest
9198 - elf_gp (htab->brlt->output_section->owner)
9199 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9200
9201 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9202 {
9203 (*_bfd_error_handler)
9204 (_("linkage table error against `%s'"),
9205 stub_entry->root.string);
9206 bfd_set_error (bfd_error_bad_value);
9207 htab->stub_error = TRUE;
9208 return FALSE;
9209 }
9210
9211 if (info->emitrelocations)
9212 {
9213 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9214 if (r == NULL)
9215 return FALSE;
9216 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9217 if (bfd_big_endian (info->output_bfd))
9218 r[0].r_offset += 2;
9219 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9220 r[0].r_offset += 4;
9221 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9222 r[0].r_addend = dest;
9223 if (PPC_HA (off) != 0)
9224 {
9225 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9226 r[1].r_offset = r[0].r_offset + 4;
9227 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9228 r[1].r_addend = r[0].r_addend;
9229 }
9230 }
9231
9232 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9233 {
9234 if (PPC_HA (off) != 0)
9235 {
9236 size = 16;
9237 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9238 loc += 4;
9239 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9240 }
9241 else
9242 {
9243 size = 12;
9244 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9245 }
9246 }
9247 else
9248 {
9249 bfd_vma r2off;
9250
9251 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9252 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9253 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9254 loc += 4;
9255 size = 20;
9256 if (PPC_HA (off) != 0)
9257 {
9258 size += 4;
9259 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9260 loc += 4;
9261 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9262 loc += 4;
9263 }
9264 else
9265 {
9266 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9267 loc += 4;
9268 }
9269
9270 if (PPC_HA (r2off) != 0)
9271 {
9272 size += 4;
9273 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9274 loc += 4;
9275 }
9276 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9277 }
9278 loc += 4;
9279 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9280 loc += 4;
9281 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9282 break;
9283
9284 case ppc_stub_plt_call:
9285 if (stub_entry->h != NULL
9286 && stub_entry->h->is_func_descriptor
9287 && stub_entry->h->oh != NULL)
9288 {
9289 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9290
9291 /* If the old-ABI "dot-symbol" is undefined make it weak so
9292 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9293 FIXME: We used to define the symbol on one of the call
9294 stubs instead, which is why we test symbol section id
9295 against htab->top_id in various places. Likely all
9296 these checks could now disappear. */
9297 if (fh->elf.root.type == bfd_link_hash_undefined)
9298 fh->elf.root.type = bfd_link_hash_undefweak;
9299 }
9300
9301 /* Now build the stub. */
9302 dest = stub_entry->plt_ent->plt.offset & ~1;
9303 if (dest >= (bfd_vma) -2)
9304 abort ();
9305
9306 plt = htab->plt;
9307 if (!htab->elf.dynamic_sections_created
9308 || stub_entry->h == NULL
9309 || stub_entry->h->elf.dynindx == -1)
9310 plt = htab->iplt;
9311
9312 dest += plt->output_offset + plt->output_section->vma;
9313
9314 if (stub_entry->h == NULL
9315 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9316 {
9317 Elf_Internal_Rela rela;
9318 bfd_byte *rl;
9319
9320 rela.r_offset = dest;
9321 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9322 rela.r_addend = (stub_entry->target_value
9323 + stub_entry->target_section->output_offset
9324 + stub_entry->target_section->output_section->vma);
9325
9326 rl = (htab->reliplt->contents
9327 + (htab->reliplt->reloc_count++
9328 * sizeof (Elf64_External_Rela)));
9329 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9330 stub_entry->plt_ent->plt.offset |= 1;
9331 }
9332
9333 off = (dest
9334 - elf_gp (plt->output_section->owner)
9335 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9336
9337 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9338 {
9339 (*_bfd_error_handler)
9340 (_("linkage table error against `%s'"),
9341 stub_entry->h != NULL
9342 ? stub_entry->h->elf.root.root.string
9343 : "<local sym>");
9344 bfd_set_error (bfd_error_bad_value);
9345 htab->stub_error = TRUE;
9346 return FALSE;
9347 }
9348
9349 r = NULL;
9350 if (info->emitrelocations)
9351 {
9352 r = get_relocs (stub_entry->stub_sec,
9353 (2 + (PPC_HA (off) != 0)
9354 + (PPC_HA (off + 16) == PPC_HA (off))));
9355 if (r == NULL)
9356 return FALSE;
9357 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9358 if (bfd_big_endian (info->output_bfd))
9359 r[0].r_offset += 2;
9360 r[0].r_addend = dest;
9361 }
9362 if (stub_entry->h != NULL
9363 && (stub_entry->h == htab->tls_get_addr_fd
9364 || stub_entry->h == htab->tls_get_addr)
9365 && !htab->no_tls_get_addr_opt)
9366 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
9367 else
9368 p = build_plt_stub (htab->stub_bfd, loc, off, r);
9369 size = p - loc;
9370 break;
9371
9372 default:
9373 BFD_FAIL ();
9374 return FALSE;
9375 }
9376
9377 stub_entry->stub_sec->size += size;
9378
9379 if (htab->emit_stub_syms)
9380 {
9381 struct elf_link_hash_entry *h;
9382 size_t len1, len2;
9383 char *name;
9384 const char *const stub_str[] = { "long_branch",
9385 "long_branch_r2off",
9386 "plt_branch",
9387 "plt_branch_r2off",
9388 "plt_call" };
9389
9390 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9391 len2 = strlen (stub_entry->root.string);
9392 name = bfd_malloc (len1 + len2 + 2);
9393 if (name == NULL)
9394 return FALSE;
9395 memcpy (name, stub_entry->root.string, 9);
9396 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9397 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9398 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9399 if (h == NULL)
9400 return FALSE;
9401 if (h->root.type == bfd_link_hash_new)
9402 {
9403 h->root.type = bfd_link_hash_defined;
9404 h->root.u.def.section = stub_entry->stub_sec;
9405 h->root.u.def.value = stub_entry->stub_offset;
9406 h->ref_regular = 1;
9407 h->def_regular = 1;
9408 h->ref_regular_nonweak = 1;
9409 h->forced_local = 1;
9410 h->non_elf = 0;
9411 }
9412 }
9413
9414 return TRUE;
9415 }
9416
9417 /* As above, but don't actually build the stub. Just bump offset so
9418 we know stub section sizes, and select plt_branch stubs where
9419 long_branch stubs won't do. */
9420
9421 static bfd_boolean
9422 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9423 {
9424 struct ppc_stub_hash_entry *stub_entry;
9425 struct bfd_link_info *info;
9426 struct ppc_link_hash_table *htab;
9427 bfd_vma off;
9428 int size;
9429
9430 /* Massage our args to the form they really have. */
9431 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9432 info = in_arg;
9433
9434 htab = ppc_hash_table (info);
9435
9436 if (stub_entry->stub_type == ppc_stub_plt_call)
9437 {
9438 asection *plt;
9439 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9440 if (off >= (bfd_vma) -2)
9441 abort ();
9442 plt = htab->plt;
9443 if (!htab->elf.dynamic_sections_created
9444 || stub_entry->h == NULL
9445 || stub_entry->h->elf.dynindx == -1)
9446 plt = htab->iplt;
9447 off += (plt->output_offset
9448 + plt->output_section->vma
9449 - elf_gp (plt->output_section->owner)
9450 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9451
9452 size = PLT_CALL_STUB_SIZE;
9453 if (PPC_HA (off) == 0)
9454 size -= 4;
9455 if (PPC_HA (off + 16) != PPC_HA (off))
9456 size += 4;
9457 if (stub_entry->h != NULL
9458 && (stub_entry->h == htab->tls_get_addr_fd
9459 || stub_entry->h == htab->tls_get_addr)
9460 && !htab->no_tls_get_addr_opt)
9461 size += 13 * 4;
9462 if (info->emitrelocations)
9463 {
9464 stub_entry->stub_sec->reloc_count
9465 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
9466 stub_entry->stub_sec->flags |= SEC_RELOC;
9467 }
9468 }
9469 else
9470 {
9471 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9472 variants. */
9473 bfd_vma r2off = 0;
9474
9475 off = (stub_entry->target_value
9476 + stub_entry->target_section->output_offset
9477 + stub_entry->target_section->output_section->vma);
9478 off -= (stub_entry->stub_sec->size
9479 + stub_entry->stub_sec->output_offset
9480 + stub_entry->stub_sec->output_section->vma);
9481
9482 /* Reset the stub type from the plt variant in case we now
9483 can reach with a shorter stub. */
9484 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9485 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9486
9487 size = 4;
9488 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9489 {
9490 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
9491 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9492 size = 12;
9493 if (PPC_HA (r2off) != 0)
9494 size = 16;
9495 off -= size - 4;
9496 }
9497
9498 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9499 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9500 {
9501 struct ppc_branch_hash_entry *br_entry;
9502
9503 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9504 stub_entry->root.string + 9,
9505 TRUE, FALSE);
9506 if (br_entry == NULL)
9507 {
9508 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9509 stub_entry->root.string);
9510 htab->stub_error = TRUE;
9511 return FALSE;
9512 }
9513
9514 if (br_entry->iter != htab->stub_iteration)
9515 {
9516 br_entry->iter = htab->stub_iteration;
9517 br_entry->offset = htab->brlt->size;
9518 htab->brlt->size += 8;
9519
9520 if (htab->relbrlt != NULL)
9521 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9522 else if (info->emitrelocations)
9523 {
9524 htab->brlt->reloc_count += 1;
9525 htab->brlt->flags |= SEC_RELOC;
9526 }
9527 }
9528
9529 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9530 off = (br_entry->offset
9531 + htab->brlt->output_offset
9532 + htab->brlt->output_section->vma
9533 - elf_gp (htab->brlt->output_section->owner)
9534 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9535
9536 if (info->emitrelocations)
9537 {
9538 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9539 stub_entry->stub_sec->flags |= SEC_RELOC;
9540 }
9541
9542 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9543 {
9544 size = 12;
9545 if (PPC_HA (off) != 0)
9546 size = 16;
9547 }
9548 else
9549 {
9550 size = 20;
9551 if (PPC_HA (off) != 0)
9552 size += 4;
9553
9554 if (PPC_HA (r2off) != 0)
9555 size += 4;
9556 }
9557 }
9558 else if (info->emitrelocations)
9559 {
9560 stub_entry->stub_sec->reloc_count += 1;
9561 stub_entry->stub_sec->flags |= SEC_RELOC;
9562 }
9563 }
9564
9565 stub_entry->stub_sec->size += size;
9566 return TRUE;
9567 }
9568
9569 /* Set up various things so that we can make a list of input sections
9570 for each output section included in the link. Returns -1 on error,
9571 0 when no stubs will be needed, and 1 on success. */
9572
9573 int
9574 ppc64_elf_setup_section_lists (bfd *output_bfd,
9575 struct bfd_link_info *info,
9576 int no_multi_toc)
9577 {
9578 bfd *input_bfd;
9579 int top_id, top_index, id;
9580 asection *section;
9581 asection **input_list;
9582 bfd_size_type amt;
9583 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9584
9585 htab->no_multi_toc = no_multi_toc;
9586
9587 if (htab->brlt == NULL)
9588 return 0;
9589
9590 /* Find the top input section id. */
9591 for (input_bfd = info->input_bfds, top_id = 3;
9592 input_bfd != NULL;
9593 input_bfd = input_bfd->link_next)
9594 {
9595 for (section = input_bfd->sections;
9596 section != NULL;
9597 section = section->next)
9598 {
9599 if (top_id < section->id)
9600 top_id = section->id;
9601 }
9602 }
9603
9604 htab->top_id = top_id;
9605 amt = sizeof (struct map_stub) * (top_id + 1);
9606 htab->stub_group = bfd_zmalloc (amt);
9607 if (htab->stub_group == NULL)
9608 return -1;
9609
9610 /* Set toc_off for com, und, abs and ind sections. */
9611 for (id = 0; id < 3; id++)
9612 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9613
9614 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9615
9616 /* We can't use output_bfd->section_count here to find the top output
9617 section index as some sections may have been removed, and
9618 strip_excluded_output_sections doesn't renumber the indices. */
9619 for (section = output_bfd->sections, top_index = 0;
9620 section != NULL;
9621 section = section->next)
9622 {
9623 if (top_index < section->index)
9624 top_index = section->index;
9625 }
9626
9627 htab->top_index = top_index;
9628 amt = sizeof (asection *) * (top_index + 1);
9629 input_list = bfd_zmalloc (amt);
9630 htab->input_list = input_list;
9631 if (input_list == NULL)
9632 return -1;
9633
9634 return 1;
9635 }
9636
9637 /* The linker repeatedly calls this function for each TOC input section
9638 and linker generated GOT section. Group input bfds such that the toc
9639 within a group is less than 64k in size. Will break with cute linker
9640 scripts that play games with dot in the output toc section. */
9641
9642 void
9643 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9644 {
9645 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9646
9647 if (!htab->no_multi_toc)
9648 {
9649 bfd_vma addr = isec->output_offset + isec->output_section->vma;
9650 bfd_vma off = addr - htab->toc_curr;
9651
9652 if (off + isec->size > 0x10000)
9653 htab->toc_curr = addr;
9654
9655 elf_gp (isec->owner) = (htab->toc_curr
9656 - elf_gp (isec->output_section->owner)
9657 + TOC_BASE_OFF);
9658 }
9659 }
9660
9661 /* Called after the last call to the above function. */
9662
9663 void
9664 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9665 {
9666 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9667
9668 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9669
9670 /* toc_curr tracks the TOC offset used for code sections below in
9671 ppc64_elf_next_input_section. Start off at 0x8000. */
9672 htab->toc_curr = TOC_BASE_OFF;
9673 }
9674
9675 /* No toc references were found in ISEC. If the code in ISEC makes no
9676 calls, then there's no need to use toc adjusting stubs when branching
9677 into ISEC. Actually, indirect calls from ISEC are OK as they will
9678 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9679 needed, and 2 if a cyclical call-graph was found but no other reason
9680 for a stub was detected. If called from the top level, a return of
9681 2 means the same as a return of 0. */
9682
9683 static int
9684 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9685 {
9686 Elf_Internal_Rela *relstart, *rel;
9687 Elf_Internal_Sym *local_syms;
9688 int ret;
9689 struct ppc_link_hash_table *htab;
9690
9691 /* We know none of our code bearing sections will need toc stubs. */
9692 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9693 return 0;
9694
9695 if (isec->size == 0)
9696 return 0;
9697
9698 if (isec->output_section == NULL)
9699 return 0;
9700
9701 if (isec->reloc_count == 0)
9702 return 0;
9703
9704 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9705 info->keep_memory);
9706 if (relstart == NULL)
9707 return -1;
9708
9709 /* Look for branches to outside of this section. */
9710 local_syms = NULL;
9711 ret = 0;
9712 htab = ppc_hash_table (info);
9713 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9714 {
9715 enum elf_ppc64_reloc_type r_type;
9716 unsigned long r_symndx;
9717 struct elf_link_hash_entry *h;
9718 struct ppc_link_hash_entry *eh;
9719 Elf_Internal_Sym *sym;
9720 asection *sym_sec;
9721 struct _opd_sec_data *opd;
9722 bfd_vma sym_value;
9723 bfd_vma dest;
9724
9725 r_type = ELF64_R_TYPE (rel->r_info);
9726 if (r_type != R_PPC64_REL24
9727 && r_type != R_PPC64_REL14
9728 && r_type != R_PPC64_REL14_BRTAKEN
9729 && r_type != R_PPC64_REL14_BRNTAKEN)
9730 continue;
9731
9732 r_symndx = ELF64_R_SYM (rel->r_info);
9733 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9734 isec->owner))
9735 {
9736 ret = -1;
9737 break;
9738 }
9739
9740 /* Calls to dynamic lib functions go through a plt call stub
9741 that uses r2. */
9742 eh = (struct ppc_link_hash_entry *) h;
9743 if (eh != NULL
9744 && (eh->elf.plt.plist != NULL
9745 || (eh->oh != NULL
9746 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
9747 {
9748 ret = 1;
9749 break;
9750 }
9751
9752 if (sym_sec == NULL)
9753 /* Ignore other undefined symbols. */
9754 continue;
9755
9756 /* Assume branches to other sections not included in the link need
9757 stubs too, to cover -R and absolute syms. */
9758 if (sym_sec->output_section == NULL)
9759 {
9760 ret = 1;
9761 break;
9762 }
9763
9764 if (h == NULL)
9765 sym_value = sym->st_value;
9766 else
9767 {
9768 if (h->root.type != bfd_link_hash_defined
9769 && h->root.type != bfd_link_hash_defweak)
9770 abort ();
9771 sym_value = h->root.u.def.value;
9772 }
9773 sym_value += rel->r_addend;
9774
9775 /* If this branch reloc uses an opd sym, find the code section. */
9776 opd = get_opd_info (sym_sec);
9777 if (opd != NULL)
9778 {
9779 if (h == NULL && opd->adjust != NULL)
9780 {
9781 long adjust;
9782
9783 adjust = opd->adjust[sym->st_value / 8];
9784 if (adjust == -1)
9785 /* Assume deleted functions won't ever be called. */
9786 continue;
9787 sym_value += adjust;
9788 }
9789
9790 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9791 if (dest == (bfd_vma) -1)
9792 continue;
9793 }
9794 else
9795 dest = (sym_value
9796 + sym_sec->output_offset
9797 + sym_sec->output_section->vma);
9798
9799 /* Ignore branch to self. */
9800 if (sym_sec == isec)
9801 continue;
9802
9803 /* If the called function uses the toc, we need a stub. */
9804 if (sym_sec->has_toc_reloc
9805 || sym_sec->makes_toc_func_call)
9806 {
9807 ret = 1;
9808 break;
9809 }
9810
9811 /* Assume any branch that needs a long branch stub might in fact
9812 need a plt_branch stub. A plt_branch stub uses r2. */
9813 else if (dest - (isec->output_offset
9814 + isec->output_section->vma
9815 + rel->r_offset) + (1 << 25) >= (2 << 25))
9816 {
9817 ret = 1;
9818 break;
9819 }
9820
9821 /* If calling back to a section in the process of being tested, we
9822 can't say for sure that no toc adjusting stubs are needed, so
9823 don't return zero. */
9824 else if (sym_sec->call_check_in_progress)
9825 ret = 2;
9826
9827 /* Branches to another section that itself doesn't have any TOC
9828 references are OK. Recursively call ourselves to check. */
9829 else if (sym_sec->id <= htab->top_id
9830 && htab->stub_group[sym_sec->id].toc_off == 0)
9831 {
9832 int recur;
9833
9834 /* Mark current section as indeterminate, so that other
9835 sections that call back to current won't be marked as
9836 known. */
9837 isec->call_check_in_progress = 1;
9838 recur = toc_adjusting_stub_needed (info, sym_sec);
9839 isec->call_check_in_progress = 0;
9840
9841 if (recur < 0)
9842 {
9843 /* An error. Exit. */
9844 ret = -1;
9845 break;
9846 }
9847 else if (recur <= 1)
9848 {
9849 /* Known result. Mark as checked and set section flag. */
9850 htab->stub_group[sym_sec->id].toc_off = 1;
9851 if (recur != 0)
9852 {
9853 sym_sec->makes_toc_func_call = 1;
9854 ret = 1;
9855 break;
9856 }
9857 }
9858 else
9859 {
9860 /* Unknown result. Continue checking. */
9861 ret = 2;
9862 }
9863 }
9864 }
9865
9866 if (local_syms != NULL
9867 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9868 free (local_syms);
9869 if (elf_section_data (isec)->relocs != relstart)
9870 free (relstart);
9871
9872 return ret;
9873 }
9874
9875 /* The linker repeatedly calls this function for each input section,
9876 in the order that input sections are linked into output sections.
9877 Build lists of input sections to determine groupings between which
9878 we may insert linker stubs. */
9879
9880 bfd_boolean
9881 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9882 {
9883 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9884
9885 if ((isec->output_section->flags & SEC_CODE) != 0
9886 && isec->output_section->index <= htab->top_index)
9887 {
9888 asection **list = htab->input_list + isec->output_section->index;
9889 /* Steal the link_sec pointer for our list. */
9890 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9891 /* This happens to make the list in reverse order,
9892 which is what we want. */
9893 PREV_SEC (isec) = *list;
9894 *list = isec;
9895 }
9896
9897 if (htab->multi_toc_needed)
9898 {
9899 /* If a code section has a function that uses the TOC then we need
9900 to use the right TOC (obviously). Also, make sure that .opd gets
9901 the correct TOC value for R_PPC64_TOC relocs that don't have or
9902 can't find their function symbol (shouldn't ever happen now).
9903 Also specially treat .fixup for the linux kernel. .fixup
9904 contains branches, but only back to the function that hit an
9905 exception. */
9906 if (isec->has_toc_reloc
9907 || (isec->flags & SEC_CODE) == 0
9908 || strcmp (isec->name, ".fixup") == 0)
9909 {
9910 if (elf_gp (isec->owner) != 0)
9911 htab->toc_curr = elf_gp (isec->owner);
9912 }
9913 else if (htab->stub_group[isec->id].toc_off == 0)
9914 {
9915 int ret = toc_adjusting_stub_needed (info, isec);
9916 if (ret < 0)
9917 return FALSE;
9918 else
9919 isec->makes_toc_func_call = ret & 1;
9920 }
9921 }
9922
9923 /* Functions that don't use the TOC can belong in any TOC group.
9924 Use the last TOC base. This happens to make _init and _fini
9925 pasting work. */
9926 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9927 return TRUE;
9928 }
9929
9930 /* See whether we can group stub sections together. Grouping stub
9931 sections may result in fewer stubs. More importantly, we need to
9932 put all .init* and .fini* stubs at the beginning of the .init or
9933 .fini output sections respectively, because glibc splits the
9934 _init and _fini functions into multiple parts. Putting a stub in
9935 the middle of a function is not a good idea. */
9936
9937 static void
9938 group_sections (struct ppc_link_hash_table *htab,
9939 bfd_size_type stub_group_size,
9940 bfd_boolean stubs_always_before_branch)
9941 {
9942 asection **list;
9943 bfd_size_type stub14_group_size;
9944 bfd_boolean suppress_size_errors;
9945
9946 suppress_size_errors = FALSE;
9947 stub14_group_size = stub_group_size;
9948 if (stub_group_size == 1)
9949 {
9950 /* Default values. */
9951 if (stubs_always_before_branch)
9952 {
9953 stub_group_size = 0x1e00000;
9954 stub14_group_size = 0x7800;
9955 }
9956 else
9957 {
9958 stub_group_size = 0x1c00000;
9959 stub14_group_size = 0x7000;
9960 }
9961 suppress_size_errors = TRUE;
9962 }
9963
9964 list = htab->input_list + htab->top_index;
9965 do
9966 {
9967 asection *tail = *list;
9968 while (tail != NULL)
9969 {
9970 asection *curr;
9971 asection *prev;
9972 bfd_size_type total;
9973 bfd_boolean big_sec;
9974 bfd_vma curr_toc;
9975
9976 curr = tail;
9977 total = tail->size;
9978 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9979 ? stub14_group_size : stub_group_size);
9980 if (big_sec && !suppress_size_errors)
9981 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9982 tail->owner, tail);
9983 curr_toc = htab->stub_group[tail->id].toc_off;
9984
9985 while ((prev = PREV_SEC (curr)) != NULL
9986 && ((total += curr->output_offset - prev->output_offset)
9987 < (ppc64_elf_section_data (prev)->has_14bit_branch
9988 ? stub14_group_size : stub_group_size))
9989 && htab->stub_group[prev->id].toc_off == curr_toc)
9990 curr = prev;
9991
9992 /* OK, the size from the start of CURR to the end is less
9993 than stub_group_size and thus can be handled by one stub
9994 section. (or the tail section is itself larger than
9995 stub_group_size, in which case we may be toast.) We
9996 should really be keeping track of the total size of stubs
9997 added here, as stubs contribute to the final output
9998 section size. That's a little tricky, and this way will
9999 only break if stubs added make the total size more than
10000 2^25, ie. for the default stub_group_size, if stubs total
10001 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10002 do
10003 {
10004 prev = PREV_SEC (tail);
10005 /* Set up this stub group. */
10006 htab->stub_group[tail->id].link_sec = curr;
10007 }
10008 while (tail != curr && (tail = prev) != NULL);
10009
10010 /* But wait, there's more! Input sections up to stub_group_size
10011 bytes before the stub section can be handled by it too.
10012 Don't do this if we have a really large section after the
10013 stubs, as adding more stubs increases the chance that
10014 branches may not reach into the stub section. */
10015 if (!stubs_always_before_branch && !big_sec)
10016 {
10017 total = 0;
10018 while (prev != NULL
10019 && ((total += tail->output_offset - prev->output_offset)
10020 < (ppc64_elf_section_data (prev)->has_14bit_branch
10021 ? stub14_group_size : stub_group_size))
10022 && htab->stub_group[prev->id].toc_off == curr_toc)
10023 {
10024 tail = prev;
10025 prev = PREV_SEC (tail);
10026 htab->stub_group[tail->id].link_sec = curr;
10027 }
10028 }
10029 tail = prev;
10030 }
10031 }
10032 while (list-- != htab->input_list);
10033 free (htab->input_list);
10034 #undef PREV_SEC
10035 }
10036
10037 /* Determine and set the size of the stub section for a final link.
10038
10039 The basic idea here is to examine all the relocations looking for
10040 PC-relative calls to a target that is unreachable with a "bl"
10041 instruction. */
10042
10043 bfd_boolean
10044 ppc64_elf_size_stubs (bfd *output_bfd,
10045 struct bfd_link_info *info,
10046 bfd_signed_vma group_size,
10047 asection *(*add_stub_section) (const char *, asection *),
10048 void (*layout_sections_again) (void))
10049 {
10050 bfd_size_type stub_group_size;
10051 bfd_boolean stubs_always_before_branch;
10052 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10053
10054 /* Stash our params away. */
10055 htab->add_stub_section = add_stub_section;
10056 htab->layout_sections_again = layout_sections_again;
10057 stubs_always_before_branch = group_size < 0;
10058 if (group_size < 0)
10059 stub_group_size = -group_size;
10060 else
10061 stub_group_size = group_size;
10062
10063 group_sections (htab, stub_group_size, stubs_always_before_branch);
10064
10065 while (1)
10066 {
10067 bfd *input_bfd;
10068 unsigned int bfd_indx;
10069 asection *stub_sec;
10070
10071 htab->stub_iteration += 1;
10072
10073 for (input_bfd = info->input_bfds, bfd_indx = 0;
10074 input_bfd != NULL;
10075 input_bfd = input_bfd->link_next, bfd_indx++)
10076 {
10077 Elf_Internal_Shdr *symtab_hdr;
10078 asection *section;
10079 Elf_Internal_Sym *local_syms = NULL;
10080
10081 if (!is_ppc64_elf (input_bfd))
10082 continue;
10083
10084 /* We'll need the symbol table in a second. */
10085 symtab_hdr = &elf_symtab_hdr (input_bfd);
10086 if (symtab_hdr->sh_info == 0)
10087 continue;
10088
10089 /* Walk over each section attached to the input bfd. */
10090 for (section = input_bfd->sections;
10091 section != NULL;
10092 section = section->next)
10093 {
10094 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10095
10096 /* If there aren't any relocs, then there's nothing more
10097 to do. */
10098 if ((section->flags & SEC_RELOC) == 0
10099 || (section->flags & SEC_ALLOC) == 0
10100 || (section->flags & SEC_LOAD) == 0
10101 || (section->flags & SEC_CODE) == 0
10102 || section->reloc_count == 0)
10103 continue;
10104
10105 /* If this section is a link-once section that will be
10106 discarded, then don't create any stubs. */
10107 if (section->output_section == NULL
10108 || section->output_section->owner != output_bfd)
10109 continue;
10110
10111 /* Get the relocs. */
10112 internal_relocs
10113 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10114 info->keep_memory);
10115 if (internal_relocs == NULL)
10116 goto error_ret_free_local;
10117
10118 /* Now examine each relocation. */
10119 irela = internal_relocs;
10120 irelaend = irela + section->reloc_count;
10121 for (; irela < irelaend; irela++)
10122 {
10123 enum elf_ppc64_reloc_type r_type;
10124 unsigned int r_indx;
10125 enum ppc_stub_type stub_type;
10126 struct ppc_stub_hash_entry *stub_entry;
10127 asection *sym_sec, *code_sec;
10128 bfd_vma sym_value, code_value;
10129 bfd_vma destination;
10130 bfd_boolean ok_dest;
10131 struct ppc_link_hash_entry *hash;
10132 struct ppc_link_hash_entry *fdh;
10133 struct elf_link_hash_entry *h;
10134 Elf_Internal_Sym *sym;
10135 char *stub_name;
10136 const asection *id_sec;
10137 struct _opd_sec_data *opd;
10138 struct plt_entry *plt_ent;
10139
10140 r_type = ELF64_R_TYPE (irela->r_info);
10141 r_indx = ELF64_R_SYM (irela->r_info);
10142
10143 if (r_type >= R_PPC64_max)
10144 {
10145 bfd_set_error (bfd_error_bad_value);
10146 goto error_ret_free_internal;
10147 }
10148
10149 /* Only look for stubs on branch instructions. */
10150 if (r_type != R_PPC64_REL24
10151 && r_type != R_PPC64_REL14
10152 && r_type != R_PPC64_REL14_BRTAKEN
10153 && r_type != R_PPC64_REL14_BRNTAKEN)
10154 continue;
10155
10156 /* Now determine the call target, its name, value,
10157 section. */
10158 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
10159 r_indx, input_bfd))
10160 goto error_ret_free_internal;
10161 hash = (struct ppc_link_hash_entry *) h;
10162
10163 ok_dest = FALSE;
10164 fdh = NULL;
10165 sym_value = 0;
10166 if (hash == NULL)
10167 {
10168 sym_value = sym->st_value;
10169 ok_dest = TRUE;
10170 }
10171 else if (hash->elf.root.type == bfd_link_hash_defined
10172 || hash->elf.root.type == bfd_link_hash_defweak)
10173 {
10174 sym_value = hash->elf.root.u.def.value;
10175 if (sym_sec->output_section != NULL)
10176 ok_dest = TRUE;
10177 }
10178 else if (hash->elf.root.type == bfd_link_hash_undefweak
10179 || hash->elf.root.type == bfd_link_hash_undefined)
10180 {
10181 /* Recognise an old ABI func code entry sym, and
10182 use the func descriptor sym instead if it is
10183 defined. */
10184 if (hash->elf.root.root.string[0] == '.'
10185 && (fdh = lookup_fdh (hash, htab)) != NULL)
10186 {
10187 if (fdh->elf.root.type == bfd_link_hash_defined
10188 || fdh->elf.root.type == bfd_link_hash_defweak)
10189 {
10190 sym_sec = fdh->elf.root.u.def.section;
10191 sym_value = fdh->elf.root.u.def.value;
10192 if (sym_sec->output_section != NULL)
10193 ok_dest = TRUE;
10194 }
10195 else
10196 fdh = NULL;
10197 }
10198 }
10199 else
10200 {
10201 bfd_set_error (bfd_error_bad_value);
10202 goto error_ret_free_internal;
10203 }
10204
10205 destination = 0;
10206 if (ok_dest)
10207 {
10208 sym_value += irela->r_addend;
10209 destination = (sym_value
10210 + sym_sec->output_offset
10211 + sym_sec->output_section->vma);
10212 }
10213
10214 code_sec = sym_sec;
10215 code_value = sym_value;
10216 opd = get_opd_info (sym_sec);
10217 if (opd != NULL)
10218 {
10219 bfd_vma dest;
10220
10221 if (hash == NULL && opd->adjust != NULL)
10222 {
10223 long adjust = opd->adjust[sym_value / 8];
10224 if (adjust == -1)
10225 continue;
10226 code_value += adjust;
10227 sym_value += adjust;
10228 }
10229 dest = opd_entry_value (sym_sec, sym_value,
10230 &code_sec, &code_value);
10231 if (dest != (bfd_vma) -1)
10232 {
10233 destination = dest;
10234 if (fdh != NULL)
10235 {
10236 /* Fixup old ABI sym to point at code
10237 entry. */
10238 hash->elf.root.type = bfd_link_hash_defweak;
10239 hash->elf.root.u.def.section = code_sec;
10240 hash->elf.root.u.def.value = code_value;
10241 }
10242 }
10243 }
10244
10245 /* Determine what (if any) linker stub is needed. */
10246 plt_ent = NULL;
10247 stub_type = ppc_type_of_stub (section, irela, &hash,
10248 &plt_ent, destination);
10249
10250 if (stub_type != ppc_stub_plt_call)
10251 {
10252 /* Check whether we need a TOC adjusting stub.
10253 Since the linker pastes together pieces from
10254 different object files when creating the
10255 _init and _fini functions, it may be that a
10256 call to what looks like a local sym is in
10257 fact a call needing a TOC adjustment. */
10258 if (code_sec != NULL
10259 && code_sec->output_section != NULL
10260 && (htab->stub_group[code_sec->id].toc_off
10261 != htab->stub_group[section->id].toc_off)
10262 && (code_sec->has_toc_reloc
10263 || code_sec->makes_toc_func_call))
10264 stub_type = ppc_stub_long_branch_r2off;
10265 }
10266
10267 if (stub_type == ppc_stub_none)
10268 continue;
10269
10270 /* __tls_get_addr calls might be eliminated. */
10271 if (stub_type != ppc_stub_plt_call
10272 && hash != NULL
10273 && (hash == htab->tls_get_addr
10274 || hash == htab->tls_get_addr_fd)
10275 && section->has_tls_reloc
10276 && irela != internal_relocs)
10277 {
10278 /* Get tls info. */
10279 char *tls_mask;
10280
10281 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
10282 irela - 1, input_bfd))
10283 goto error_ret_free_internal;
10284 if (*tls_mask != 0)
10285 continue;
10286 }
10287
10288 /* Support for grouping stub sections. */
10289 id_sec = htab->stub_group[section->id].link_sec;
10290
10291 /* Get the name of this stub. */
10292 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
10293 if (!stub_name)
10294 goto error_ret_free_internal;
10295
10296 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
10297 stub_name, FALSE, FALSE);
10298 if (stub_entry != NULL)
10299 {
10300 /* The proper stub has already been created. */
10301 free (stub_name);
10302 continue;
10303 }
10304
10305 stub_entry = ppc_add_stub (stub_name, section, htab);
10306 if (stub_entry == NULL)
10307 {
10308 free (stub_name);
10309 error_ret_free_internal:
10310 if (elf_section_data (section)->relocs == NULL)
10311 free (internal_relocs);
10312 error_ret_free_local:
10313 if (local_syms != NULL
10314 && (symtab_hdr->contents
10315 != (unsigned char *) local_syms))
10316 free (local_syms);
10317 return FALSE;
10318 }
10319
10320 stub_entry->stub_type = stub_type;
10321 if (stub_type != ppc_stub_plt_call)
10322 {
10323 stub_entry->target_value = code_value;
10324 stub_entry->target_section = code_sec;
10325 }
10326 else
10327 {
10328 stub_entry->target_value = sym_value;
10329 stub_entry->target_section = sym_sec;
10330 }
10331 stub_entry->h = hash;
10332 stub_entry->plt_ent = plt_ent;
10333 stub_entry->addend = irela->r_addend;
10334
10335 if (stub_entry->h != NULL)
10336 htab->stub_globals += 1;
10337 }
10338
10339 /* We're done with the internal relocs, free them. */
10340 if (elf_section_data (section)->relocs != internal_relocs)
10341 free (internal_relocs);
10342 }
10343
10344 if (local_syms != NULL
10345 && symtab_hdr->contents != (unsigned char *) local_syms)
10346 {
10347 if (!info->keep_memory)
10348 free (local_syms);
10349 else
10350 symtab_hdr->contents = (unsigned char *) local_syms;
10351 }
10352 }
10353
10354 /* We may have added some stubs. Find out the new size of the
10355 stub sections. */
10356 for (stub_sec = htab->stub_bfd->sections;
10357 stub_sec != NULL;
10358 stub_sec = stub_sec->next)
10359 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10360 {
10361 stub_sec->rawsize = stub_sec->size;
10362 stub_sec->size = 0;
10363 stub_sec->reloc_count = 0;
10364 stub_sec->flags &= ~SEC_RELOC;
10365 }
10366
10367 htab->brlt->size = 0;
10368 htab->brlt->reloc_count = 0;
10369 htab->brlt->flags &= ~SEC_RELOC;
10370 if (htab->relbrlt != NULL)
10371 htab->relbrlt->size = 0;
10372
10373 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
10374
10375 if (info->emitrelocations
10376 && htab->glink != NULL && htab->glink->size != 0)
10377 {
10378 htab->glink->reloc_count = 1;
10379 htab->glink->flags |= SEC_RELOC;
10380 }
10381
10382 for (stub_sec = htab->stub_bfd->sections;
10383 stub_sec != NULL;
10384 stub_sec = stub_sec->next)
10385 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10386 && stub_sec->rawsize != stub_sec->size)
10387 break;
10388
10389 /* Exit from this loop when no stubs have been added, and no stubs
10390 have changed size. */
10391 if (stub_sec == NULL)
10392 break;
10393
10394 /* Ask the linker to do its stuff. */
10395 (*htab->layout_sections_again) ();
10396 }
10397
10398 /* It would be nice to strip htab->brlt from the output if the
10399 section is empty, but it's too late. If we strip sections here,
10400 the dynamic symbol table is corrupted since the section symbol
10401 for the stripped section isn't written. */
10402
10403 return TRUE;
10404 }
10405
10406 /* Called after we have determined section placement. If sections
10407 move, we'll be called again. Provide a value for TOCstart. */
10408
10409 bfd_vma
10410 ppc64_elf_toc (bfd *obfd)
10411 {
10412 asection *s;
10413 bfd_vma TOCstart;
10414
10415 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
10416 order. The TOC starts where the first of these sections starts. */
10417 s = bfd_get_section_by_name (obfd, ".got");
10418 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10419 s = bfd_get_section_by_name (obfd, ".toc");
10420 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10421 s = bfd_get_section_by_name (obfd, ".tocbss");
10422 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10423 s = bfd_get_section_by_name (obfd, ".plt");
10424 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
10425 {
10426 /* This may happen for
10427 o references to TOC base (SYM@toc / TOC[tc0]) without a
10428 .toc directive
10429 o bad linker script
10430 o --gc-sections and empty TOC sections
10431
10432 FIXME: Warn user? */
10433
10434 /* Look for a likely section. We probably won't even be
10435 using TOCstart. */
10436 for (s = obfd->sections; s != NULL; s = s->next)
10437 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
10438 | SEC_EXCLUDE))
10439 == (SEC_ALLOC | SEC_SMALL_DATA))
10440 break;
10441 if (s == NULL)
10442 for (s = obfd->sections; s != NULL; s = s->next)
10443 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
10444 == (SEC_ALLOC | SEC_SMALL_DATA))
10445 break;
10446 if (s == NULL)
10447 for (s = obfd->sections; s != NULL; s = s->next)
10448 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
10449 == SEC_ALLOC)
10450 break;
10451 if (s == NULL)
10452 for (s = obfd->sections; s != NULL; s = s->next)
10453 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
10454 break;
10455 }
10456
10457 TOCstart = 0;
10458 if (s != NULL)
10459 TOCstart = s->output_section->vma + s->output_offset;
10460
10461 return TOCstart;
10462 }
10463
10464 /* Build all the stubs associated with the current output file.
10465 The stubs are kept in a hash table attached to the main linker
10466 hash table. This function is called via gldelf64ppc_finish. */
10467
10468 bfd_boolean
10469 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
10470 struct bfd_link_info *info,
10471 char **stats)
10472 {
10473 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10474 asection *stub_sec;
10475 bfd_byte *p;
10476 int stub_sec_count = 0;
10477
10478 htab->emit_stub_syms = emit_stub_syms;
10479
10480 /* Allocate memory to hold the linker stubs. */
10481 for (stub_sec = htab->stub_bfd->sections;
10482 stub_sec != NULL;
10483 stub_sec = stub_sec->next)
10484 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
10485 && stub_sec->size != 0)
10486 {
10487 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
10488 if (stub_sec->contents == NULL)
10489 return FALSE;
10490 /* We want to check that built size is the same as calculated
10491 size. rawsize is a convenient location to use. */
10492 stub_sec->rawsize = stub_sec->size;
10493 stub_sec->size = 0;
10494 }
10495
10496 if (htab->glink != NULL && htab->glink->size != 0)
10497 {
10498 unsigned int indx;
10499 bfd_vma plt0;
10500
10501 /* Build the .glink plt call stub. */
10502 if (htab->emit_stub_syms)
10503 {
10504 struct elf_link_hash_entry *h;
10505 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
10506 TRUE, FALSE, FALSE);
10507 if (h == NULL)
10508 return FALSE;
10509 if (h->root.type == bfd_link_hash_new)
10510 {
10511 h->root.type = bfd_link_hash_defined;
10512 h->root.u.def.section = htab->glink;
10513 h->root.u.def.value = 8;
10514 h->ref_regular = 1;
10515 h->def_regular = 1;
10516 h->ref_regular_nonweak = 1;
10517 h->forced_local = 1;
10518 h->non_elf = 0;
10519 }
10520 }
10521 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10522 if (info->emitrelocations)
10523 {
10524 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10525 if (r == NULL)
10526 return FALSE;
10527 r->r_offset = (htab->glink->output_offset
10528 + htab->glink->output_section->vma);
10529 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10530 r->r_addend = plt0;
10531 }
10532 p = htab->glink->contents;
10533 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10534 bfd_put_64 (htab->glink->owner, plt0, p);
10535 p += 8;
10536 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
10537 p += 4;
10538 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
10539 p += 4;
10540 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
10541 p += 4;
10542 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
10543 p += 4;
10544 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
10545 p += 4;
10546 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10547 p += 4;
10548 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10549 p += 4;
10550 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10551 p += 4;
10552 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10553 p += 4;
10554 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10555 p += 4;
10556 bfd_put_32 (htab->glink->owner, BCTR, p);
10557 p += 4;
10558 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10559 {
10560 bfd_put_32 (htab->glink->owner, NOP, p);
10561 p += 4;
10562 }
10563
10564 /* Build the .glink lazy link call stubs. */
10565 indx = 0;
10566 while (p < htab->glink->contents + htab->glink->size)
10567 {
10568 if (indx < 0x8000)
10569 {
10570 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10571 p += 4;
10572 }
10573 else
10574 {
10575 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10576 p += 4;
10577 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10578 p += 4;
10579 }
10580 bfd_put_32 (htab->glink->owner,
10581 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10582 indx++;
10583 p += 4;
10584 }
10585 htab->glink->rawsize = p - htab->glink->contents;
10586 }
10587
10588 if (htab->brlt->size != 0)
10589 {
10590 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10591 htab->brlt->size);
10592 if (htab->brlt->contents == NULL)
10593 return FALSE;
10594 }
10595 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10596 {
10597 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10598 htab->relbrlt->size);
10599 if (htab->relbrlt->contents == NULL)
10600 return FALSE;
10601 }
10602
10603 /* Build the stubs as directed by the stub hash table. */
10604 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10605
10606 if (htab->relbrlt != NULL)
10607 htab->relbrlt->reloc_count = 0;
10608
10609 for (stub_sec = htab->stub_bfd->sections;
10610 stub_sec != NULL;
10611 stub_sec = stub_sec->next)
10612 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10613 {
10614 stub_sec_count += 1;
10615 if (stub_sec->rawsize != stub_sec->size)
10616 break;
10617 }
10618
10619 if (stub_sec != NULL
10620 || htab->glink->rawsize != htab->glink->size)
10621 {
10622 htab->stub_error = TRUE;
10623 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10624 }
10625
10626 if (htab->stub_error)
10627 return FALSE;
10628
10629 if (stats != NULL)
10630 {
10631 *stats = bfd_malloc (500);
10632 if (*stats == NULL)
10633 return FALSE;
10634
10635 sprintf (*stats, _("linker stubs in %u group%s\n"
10636 " branch %lu\n"
10637 " toc adjust %lu\n"
10638 " long branch %lu\n"
10639 " long toc adj %lu\n"
10640 " plt call %lu"),
10641 stub_sec_count,
10642 stub_sec_count == 1 ? "" : "s",
10643 htab->stub_count[ppc_stub_long_branch - 1],
10644 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10645 htab->stub_count[ppc_stub_plt_branch - 1],
10646 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10647 htab->stub_count[ppc_stub_plt_call - 1]);
10648 }
10649 return TRUE;
10650 }
10651
10652 /* This function undoes the changes made by add_symbol_adjust. */
10653
10654 static bfd_boolean
10655 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10656 {
10657 struct ppc_link_hash_entry *eh;
10658
10659 if (h->root.type == bfd_link_hash_indirect)
10660 return TRUE;
10661
10662 if (h->root.type == bfd_link_hash_warning)
10663 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10664
10665 eh = (struct ppc_link_hash_entry *) h;
10666 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10667 return TRUE;
10668
10669 eh->elf.root.type = bfd_link_hash_undefined;
10670 return TRUE;
10671 }
10672
10673 void
10674 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10675 {
10676 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10677 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10678 }
10679
10680 /* What to do when ld finds relocations against symbols defined in
10681 discarded sections. */
10682
10683 static unsigned int
10684 ppc64_elf_action_discarded (asection *sec)
10685 {
10686 if (strcmp (".opd", sec->name) == 0)
10687 return 0;
10688
10689 if (strcmp (".toc", sec->name) == 0)
10690 return 0;
10691
10692 if (strcmp (".toc1", sec->name) == 0)
10693 return 0;
10694
10695 return _bfd_elf_default_action_discarded (sec);
10696 }
10697
10698 /* The RELOCATE_SECTION function is called by the ELF backend linker
10699 to handle the relocations for a section.
10700
10701 The relocs are always passed as Rela structures; if the section
10702 actually uses Rel structures, the r_addend field will always be
10703 zero.
10704
10705 This function is responsible for adjust the section contents as
10706 necessary, and (if using Rela relocs and generating a
10707 relocatable output file) adjusting the reloc addend as
10708 necessary.
10709
10710 This function does not have to worry about setting the reloc
10711 address or the reloc symbol index.
10712
10713 LOCAL_SYMS is a pointer to the swapped in local symbols.
10714
10715 LOCAL_SECTIONS is an array giving the section in the input file
10716 corresponding to the st_shndx field of each local symbol.
10717
10718 The global hash table entry for the global symbols can be found
10719 via elf_sym_hashes (input_bfd).
10720
10721 When generating relocatable output, this function must handle
10722 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10723 going to be the section symbol corresponding to the output
10724 section, which means that the addend must be adjusted
10725 accordingly. */
10726
10727 static bfd_boolean
10728 ppc64_elf_relocate_section (bfd *output_bfd,
10729 struct bfd_link_info *info,
10730 bfd *input_bfd,
10731 asection *input_section,
10732 bfd_byte *contents,
10733 Elf_Internal_Rela *relocs,
10734 Elf_Internal_Sym *local_syms,
10735 asection **local_sections)
10736 {
10737 struct ppc_link_hash_table *htab;
10738 Elf_Internal_Shdr *symtab_hdr;
10739 struct elf_link_hash_entry **sym_hashes;
10740 Elf_Internal_Rela *rel;
10741 Elf_Internal_Rela *relend;
10742 Elf_Internal_Rela outrel;
10743 bfd_byte *loc;
10744 struct got_entry **local_got_ents;
10745 bfd_vma TOCstart;
10746 bfd_boolean ret = TRUE;
10747 bfd_boolean is_opd;
10748 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10749 bfd_boolean is_power4 = FALSE;
10750 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10751
10752 /* Initialize howto table if needed. */
10753 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10754 ppc_howto_init ();
10755
10756 htab = ppc_hash_table (info);
10757
10758 /* Don't relocate stub sections. */
10759 if (input_section->owner == htab->stub_bfd)
10760 return TRUE;
10761
10762 BFD_ASSERT (is_ppc64_elf (input_bfd));
10763
10764 local_got_ents = elf_local_got_ents (input_bfd);
10765 TOCstart = elf_gp (output_bfd);
10766 symtab_hdr = &elf_symtab_hdr (input_bfd);
10767 sym_hashes = elf_sym_hashes (input_bfd);
10768 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10769
10770 rel = relocs;
10771 relend = relocs + input_section->reloc_count;
10772 for (; rel < relend; rel++)
10773 {
10774 enum elf_ppc64_reloc_type r_type;
10775 bfd_vma addend, orig_addend;
10776 bfd_reloc_status_type r;
10777 Elf_Internal_Sym *sym;
10778 asection *sec;
10779 struct elf_link_hash_entry *h_elf;
10780 struct ppc_link_hash_entry *h;
10781 struct ppc_link_hash_entry *fdh;
10782 const char *sym_name;
10783 unsigned long r_symndx, toc_symndx;
10784 bfd_vma toc_addend;
10785 char tls_mask, tls_gd, tls_type;
10786 char sym_type;
10787 bfd_vma relocation;
10788 bfd_boolean unresolved_reloc;
10789 bfd_boolean warned;
10790 unsigned long insn, mask;
10791 struct ppc_stub_hash_entry *stub_entry;
10792 bfd_vma max_br_offset;
10793 bfd_vma from;
10794
10795 r_type = ELF64_R_TYPE (rel->r_info);
10796 r_symndx = ELF64_R_SYM (rel->r_info);
10797
10798 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10799 symbol of the previous ADDR64 reloc. The symbol gives us the
10800 proper TOC base to use. */
10801 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10802 && rel != relocs
10803 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10804 && is_opd)
10805 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10806
10807 sym = NULL;
10808 sec = NULL;
10809 h_elf = NULL;
10810 sym_name = NULL;
10811 unresolved_reloc = FALSE;
10812 warned = FALSE;
10813 orig_addend = rel->r_addend;
10814
10815 if (r_symndx < symtab_hdr->sh_info)
10816 {
10817 /* It's a local symbol. */
10818 struct _opd_sec_data *opd;
10819
10820 sym = local_syms + r_symndx;
10821 sec = local_sections[r_symndx];
10822 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10823 sym_type = ELF64_ST_TYPE (sym->st_info);
10824 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10825 opd = get_opd_info (sec);
10826 if (opd != NULL && opd->adjust != NULL)
10827 {
10828 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10829 if (adjust == -1)
10830 relocation = 0;
10831 else
10832 {
10833 /* If this is a relocation against the opd section sym
10834 and we have edited .opd, adjust the reloc addend so
10835 that ld -r and ld --emit-relocs output is correct.
10836 If it is a reloc against some other .opd symbol,
10837 then the symbol value will be adjusted later. */
10838 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10839 rel->r_addend += adjust;
10840 else
10841 relocation += adjust;
10842 }
10843 }
10844 }
10845 else
10846 {
10847 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10848 r_symndx, symtab_hdr, sym_hashes,
10849 h_elf, sec, relocation,
10850 unresolved_reloc, warned);
10851 sym_name = h_elf->root.root.string;
10852 sym_type = h_elf->type;
10853 }
10854 h = (struct ppc_link_hash_entry *) h_elf;
10855
10856 if (sec != NULL && elf_discarded_section (sec))
10857 {
10858 /* For relocs against symbols from removed linkonce sections,
10859 or sections discarded by a linker script, we just want the
10860 section contents zeroed. Avoid any special processing. */
10861 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10862 contents + rel->r_offset);
10863 rel->r_info = 0;
10864 rel->r_addend = 0;
10865 continue;
10866 }
10867
10868 if (info->relocatable)
10869 continue;
10870
10871 /* TLS optimizations. Replace instruction sequences and relocs
10872 based on information we collected in tls_optimize. We edit
10873 RELOCS so that --emit-relocs will output something sensible
10874 for the final instruction stream. */
10875 tls_mask = 0;
10876 tls_gd = 0;
10877 toc_symndx = 0;
10878 if (h != NULL)
10879 tls_mask = h->tls_mask;
10880 else if (local_got_ents != NULL)
10881 {
10882 struct plt_entry **local_plt = (struct plt_entry **)
10883 (local_got_ents + symtab_hdr->sh_info);
10884 char *lgot_masks = (char *)
10885 (local_plt + symtab_hdr->sh_info);
10886 tls_mask = lgot_masks[r_symndx];
10887 }
10888 if (tls_mask == 0
10889 && (r_type == R_PPC64_TLS
10890 || r_type == R_PPC64_TLSGD
10891 || r_type == R_PPC64_TLSLD))
10892 {
10893 /* Check for toc tls entries. */
10894 char *toc_tls;
10895
10896 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10897 &local_syms, rel, input_bfd))
10898 return FALSE;
10899
10900 if (toc_tls)
10901 tls_mask = *toc_tls;
10902 }
10903
10904 /* Check that tls relocs are used with tls syms, and non-tls
10905 relocs are used with non-tls syms. */
10906 if (r_symndx != 0
10907 && r_type != R_PPC64_NONE
10908 && (h == NULL
10909 || h->elf.root.type == bfd_link_hash_defined
10910 || h->elf.root.type == bfd_link_hash_defweak)
10911 && (IS_PPC64_TLS_RELOC (r_type)
10912 != (sym_type == STT_TLS
10913 || (sym_type == STT_SECTION
10914 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10915 {
10916 if (tls_mask != 0
10917 && (r_type == R_PPC64_TLS
10918 || r_type == R_PPC64_TLSGD
10919 || r_type == R_PPC64_TLSLD))
10920 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10921 ;
10922 else
10923 (*_bfd_error_handler)
10924 (!IS_PPC64_TLS_RELOC (r_type)
10925 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10926 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10927 input_bfd,
10928 input_section,
10929 (long) rel->r_offset,
10930 ppc64_elf_howto_table[r_type]->name,
10931 sym_name);
10932 }
10933
10934 /* Ensure reloc mapping code below stays sane. */
10935 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10936 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10937 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10938 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10939 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10940 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10941 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10942 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10943 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10944 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10945 abort ();
10946
10947 switch (r_type)
10948 {
10949 default:
10950 break;
10951
10952 case R_PPC64_TOC16:
10953 case R_PPC64_TOC16_LO:
10954 case R_PPC64_TOC16_DS:
10955 case R_PPC64_TOC16_LO_DS:
10956 {
10957 /* Check for toc tls entries. */
10958 char *toc_tls;
10959 int retval;
10960
10961 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10962 &local_syms, rel, input_bfd);
10963 if (retval == 0)
10964 return FALSE;
10965
10966 if (toc_tls)
10967 {
10968 tls_mask = *toc_tls;
10969 if (r_type == R_PPC64_TOC16_DS
10970 || r_type == R_PPC64_TOC16_LO_DS)
10971 {
10972 if (tls_mask != 0
10973 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10974 goto toctprel;
10975 }
10976 else
10977 {
10978 /* If we found a GD reloc pair, then we might be
10979 doing a GD->IE transition. */
10980 if (retval == 2)
10981 {
10982 tls_gd = TLS_TPRELGD;
10983 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10984 goto tls_ldgd_opt;
10985 }
10986 else if (retval == 3)
10987 {
10988 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10989 goto tls_ldgd_opt;
10990 }
10991 }
10992 }
10993 }
10994 break;
10995
10996 case R_PPC64_GOT_TPREL16_DS:
10997 case R_PPC64_GOT_TPREL16_LO_DS:
10998 if (tls_mask != 0
10999 && (tls_mask & TLS_TPREL) == 0)
11000 {
11001 toctprel:
11002 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11003 insn &= 31 << 21;
11004 insn |= 0x3c0d0000; /* addis 0,13,0 */
11005 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11006 r_type = R_PPC64_TPREL16_HA;
11007 if (toc_symndx != 0)
11008 {
11009 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11010 rel->r_addend = toc_addend;
11011 /* We changed the symbol. Start over in order to
11012 get h, sym, sec etc. right. */
11013 rel--;
11014 continue;
11015 }
11016 else
11017 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11018 }
11019 break;
11020
11021 case R_PPC64_TLS:
11022 if (tls_mask != 0
11023 && (tls_mask & TLS_TPREL) == 0)
11024 {
11025 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
11026 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
11027 if (insn == 0)
11028 abort ();
11029 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11030 /* Was PPC64_TLS which sits on insn boundary, now
11031 PPC64_TPREL16_LO which is at low-order half-word. */
11032 rel->r_offset += d_offset;
11033 r_type = R_PPC64_TPREL16_LO;
11034 if (toc_symndx != 0)
11035 {
11036 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
11037 rel->r_addend = toc_addend;
11038 /* We changed the symbol. Start over in order to
11039 get h, sym, sec etc. right. */
11040 rel--;
11041 continue;
11042 }
11043 else
11044 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11045 }
11046 break;
11047
11048 case R_PPC64_GOT_TLSGD16_HI:
11049 case R_PPC64_GOT_TLSGD16_HA:
11050 tls_gd = TLS_TPRELGD;
11051 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11052 goto tls_gdld_hi;
11053 break;
11054
11055 case R_PPC64_GOT_TLSLD16_HI:
11056 case R_PPC64_GOT_TLSLD16_HA:
11057 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11058 {
11059 tls_gdld_hi:
11060 if ((tls_mask & tls_gd) != 0)
11061 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11062 + R_PPC64_GOT_TPREL16_DS);
11063 else
11064 {
11065 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11066 rel->r_offset -= d_offset;
11067 r_type = R_PPC64_NONE;
11068 }
11069 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11070 }
11071 break;
11072
11073 case R_PPC64_GOT_TLSGD16:
11074 case R_PPC64_GOT_TLSGD16_LO:
11075 tls_gd = TLS_TPRELGD;
11076 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11077 goto tls_ldgd_opt;
11078 break;
11079
11080 case R_PPC64_GOT_TLSLD16:
11081 case R_PPC64_GOT_TLSLD16_LO:
11082 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11083 {
11084 unsigned int insn1, insn2, insn3;
11085 bfd_vma offset;
11086
11087 tls_ldgd_opt:
11088 offset = (bfd_vma) -1;
11089 /* If not using the newer R_PPC64_TLSGD/LD to mark
11090 __tls_get_addr calls, we must trust that the call
11091 stays with its arg setup insns, ie. that the next
11092 reloc is the __tls_get_addr call associated with
11093 the current reloc. Edit both insns. */
11094 if (input_section->has_tls_get_addr_call
11095 && rel + 1 < relend
11096 && branch_reloc_hash_match (input_bfd, rel + 1,
11097 htab->tls_get_addr,
11098 htab->tls_get_addr_fd))
11099 offset = rel[1].r_offset;
11100 if ((tls_mask & tls_gd) != 0)
11101 {
11102 /* IE */
11103 insn1 = bfd_get_32 (output_bfd,
11104 contents + rel->r_offset - d_offset);
11105 insn1 &= (1 << 26) - (1 << 2);
11106 insn1 |= 58 << 26; /* ld */
11107 insn2 = 0x7c636a14; /* add 3,3,13 */
11108 if (offset != (bfd_vma) -1)
11109 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11110 if ((tls_mask & TLS_EXPLICIT) == 0)
11111 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
11112 + R_PPC64_GOT_TPREL16_DS);
11113 else
11114 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
11115 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11116 }
11117 else
11118 {
11119 /* LE */
11120 insn1 = 0x3c6d0000; /* addis 3,13,0 */
11121 insn2 = 0x38630000; /* addi 3,3,0 */
11122 if (tls_gd == 0)
11123 {
11124 /* Was an LD reloc. */
11125 if (toc_symndx)
11126 sec = local_sections[toc_symndx];
11127 for (r_symndx = 0;
11128 r_symndx < symtab_hdr->sh_info;
11129 r_symndx++)
11130 if (local_sections[r_symndx] == sec)
11131 break;
11132 if (r_symndx >= symtab_hdr->sh_info)
11133 r_symndx = 0;
11134 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11135 if (r_symndx != 0)
11136 rel->r_addend -= (local_syms[r_symndx].st_value
11137 + sec->output_offset
11138 + sec->output_section->vma);
11139 }
11140 else if (toc_symndx != 0)
11141 {
11142 r_symndx = toc_symndx;
11143 rel->r_addend = toc_addend;
11144 }
11145 r_type = R_PPC64_TPREL16_HA;
11146 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11147 if (offset != (bfd_vma) -1)
11148 {
11149 rel[1].r_info = ELF64_R_INFO (r_symndx,
11150 R_PPC64_TPREL16_LO);
11151 rel[1].r_offset = offset + d_offset;
11152 rel[1].r_addend = rel->r_addend;
11153 }
11154 }
11155 bfd_put_32 (output_bfd, insn1,
11156 contents + rel->r_offset - d_offset);
11157 if (offset != (bfd_vma) -1)
11158 {
11159 insn3 = bfd_get_32 (output_bfd,
11160 contents + offset + 4);
11161 if (insn3 == NOP
11162 || insn3 == CROR_151515 || insn3 == CROR_313131)
11163 {
11164 rel[1].r_offset += 4;
11165 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11166 insn2 = NOP;
11167 }
11168 bfd_put_32 (output_bfd, insn2, contents + offset);
11169 }
11170 if ((tls_mask & tls_gd) == 0
11171 && (tls_gd == 0 || toc_symndx != 0))
11172 {
11173 /* We changed the symbol. Start over in order
11174 to get h, sym, sec etc. right. */
11175 rel--;
11176 continue;
11177 }
11178 }
11179 break;
11180
11181 case R_PPC64_TLSGD:
11182 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
11183 {
11184 unsigned int insn2, insn3;
11185 bfd_vma offset = rel->r_offset;
11186
11187 if ((tls_mask & TLS_TPRELGD) != 0)
11188 {
11189 /* IE */
11190 r_type = R_PPC64_NONE;
11191 insn2 = 0x7c636a14; /* add 3,3,13 */
11192 }
11193 else
11194 {
11195 /* LE */
11196 if (toc_symndx != 0)
11197 {
11198 r_symndx = toc_symndx;
11199 rel->r_addend = toc_addend;
11200 }
11201 r_type = R_PPC64_TPREL16_LO;
11202 rel->r_offset = offset + d_offset;
11203 insn2 = 0x38630000; /* addi 3,3,0 */
11204 }
11205 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11206 /* Zap the reloc on the _tls_get_addr call too. */
11207 BFD_ASSERT (offset == rel[1].r_offset);
11208 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11209 insn3 = bfd_get_32 (output_bfd,
11210 contents + offset + 4);
11211 if (insn3 == NOP
11212 || insn3 == CROR_151515 || insn3 == CROR_313131)
11213 {
11214 rel->r_offset += 4;
11215 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11216 insn2 = NOP;
11217 }
11218 bfd_put_32 (output_bfd, insn2, contents + offset);
11219 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
11220 {
11221 rel--;
11222 continue;
11223 }
11224 }
11225 break;
11226
11227 case R_PPC64_TLSLD:
11228 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
11229 {
11230 unsigned int insn2, insn3;
11231 bfd_vma offset = rel->r_offset;
11232
11233 if (toc_symndx)
11234 sec = local_sections[toc_symndx];
11235 for (r_symndx = 0;
11236 r_symndx < symtab_hdr->sh_info;
11237 r_symndx++)
11238 if (local_sections[r_symndx] == sec)
11239 break;
11240 if (r_symndx >= symtab_hdr->sh_info)
11241 r_symndx = 0;
11242 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
11243 if (r_symndx != 0)
11244 rel->r_addend -= (local_syms[r_symndx].st_value
11245 + sec->output_offset
11246 + sec->output_section->vma);
11247
11248 r_type = R_PPC64_TPREL16_LO;
11249 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11250 rel->r_offset = offset + d_offset;
11251 /* Zap the reloc on the _tls_get_addr call too. */
11252 BFD_ASSERT (offset == rel[1].r_offset);
11253 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
11254 insn2 = 0x38630000; /* addi 3,3,0 */
11255 insn3 = bfd_get_32 (output_bfd,
11256 contents + offset + 4);
11257 if (insn3 == NOP
11258 || insn3 == CROR_151515 || insn3 == CROR_313131)
11259 {
11260 rel->r_offset += 4;
11261 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
11262 insn2 = NOP;
11263 }
11264 bfd_put_32 (output_bfd, insn2, contents + offset);
11265 rel--;
11266 continue;
11267 }
11268 break;
11269
11270 case R_PPC64_DTPMOD64:
11271 if (rel + 1 < relend
11272 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
11273 && rel[1].r_offset == rel->r_offset + 8)
11274 {
11275 if ((tls_mask & TLS_GD) == 0)
11276 {
11277 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
11278 if ((tls_mask & TLS_TPRELGD) != 0)
11279 r_type = R_PPC64_TPREL64;
11280 else
11281 {
11282 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11283 r_type = R_PPC64_NONE;
11284 }
11285 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11286 }
11287 }
11288 else
11289 {
11290 if ((tls_mask & TLS_LD) == 0)
11291 {
11292 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
11293 r_type = R_PPC64_NONE;
11294 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11295 }
11296 }
11297 break;
11298
11299 case R_PPC64_TPREL64:
11300 if ((tls_mask & TLS_TPREL) == 0)
11301 {
11302 r_type = R_PPC64_NONE;
11303 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11304 }
11305 break;
11306 }
11307
11308 /* Handle other relocations that tweak non-addend part of insn. */
11309 insn = 0;
11310 max_br_offset = 1 << 25;
11311 addend = rel->r_addend;
11312 switch (r_type)
11313 {
11314 default:
11315 break;
11316
11317 /* Branch taken prediction relocations. */
11318 case R_PPC64_ADDR14_BRTAKEN:
11319 case R_PPC64_REL14_BRTAKEN:
11320 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
11321 /* Fall thru. */
11322
11323 /* Branch not taken prediction relocations. */
11324 case R_PPC64_ADDR14_BRNTAKEN:
11325 case R_PPC64_REL14_BRNTAKEN:
11326 insn |= bfd_get_32 (output_bfd,
11327 contents + rel->r_offset) & ~(0x01 << 21);
11328 /* Fall thru. */
11329
11330 case R_PPC64_REL14:
11331 max_br_offset = 1 << 15;
11332 /* Fall thru. */
11333
11334 case R_PPC64_REL24:
11335 /* Calls to functions with a different TOC, such as calls to
11336 shared objects, need to alter the TOC pointer. This is
11337 done using a linkage stub. A REL24 branching to these
11338 linkage stubs needs to be followed by a nop, as the nop
11339 will be replaced with an instruction to restore the TOC
11340 base pointer. */
11341 stub_entry = NULL;
11342 fdh = h;
11343 if (h != NULL
11344 && h->oh != NULL
11345 && h->oh->is_func_descriptor)
11346 fdh = ppc_follow_link (h->oh);
11347 if (((fdh != NULL
11348 && fdh->elf.plt.plist != NULL)
11349 || (sec != NULL
11350 && sec->output_section != NULL
11351 && sec->id <= htab->top_id
11352 && (htab->stub_group[sec->id].toc_off
11353 != htab->stub_group[input_section->id].toc_off))
11354 || (h == NULL
11355 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
11356 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
11357 rel, htab)) != NULL
11358 && (stub_entry->stub_type == ppc_stub_plt_call
11359 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
11360 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
11361 {
11362 bfd_boolean can_plt_call = FALSE;
11363
11364 if (rel->r_offset + 8 <= input_section->size)
11365 {
11366 unsigned long nop;
11367 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
11368 if (nop == NOP
11369 || nop == CROR_151515 || nop == CROR_313131)
11370 {
11371 if (h != NULL
11372 && (h == htab->tls_get_addr_fd
11373 || h == htab->tls_get_addr)
11374 && !htab->no_tls_get_addr_opt)
11375 {
11376 /* Special stub used, leave nop alone. */
11377 }
11378 else
11379 bfd_put_32 (input_bfd, LD_R2_40R1,
11380 contents + rel->r_offset + 4);
11381 can_plt_call = TRUE;
11382 }
11383 }
11384
11385 if (!can_plt_call)
11386 {
11387 if (stub_entry->stub_type == ppc_stub_plt_call)
11388 {
11389 /* If this is a plain branch rather than a branch
11390 and link, don't require a nop. However, don't
11391 allow tail calls in a shared library as they
11392 will result in r2 being corrupted. */
11393 unsigned long br;
11394 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
11395 if (info->executable && (br & 1) == 0)
11396 can_plt_call = TRUE;
11397 else
11398 stub_entry = NULL;
11399 }
11400 else if (h != NULL
11401 && strcmp (h->elf.root.root.string,
11402 ".__libc_start_main") == 0)
11403 {
11404 /* Allow crt1 branch to go via a toc adjusting stub. */
11405 can_plt_call = TRUE;
11406 }
11407 else
11408 {
11409 if (strcmp (input_section->output_section->name,
11410 ".init") == 0
11411 || strcmp (input_section->output_section->name,
11412 ".fini") == 0)
11413 (*_bfd_error_handler)
11414 (_("%B(%A+0x%lx): automatic multiple TOCs "
11415 "not supported using your crt files; "
11416 "recompile with -mminimal-toc or upgrade gcc"),
11417 input_bfd,
11418 input_section,
11419 (long) rel->r_offset);
11420 else
11421 (*_bfd_error_handler)
11422 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
11423 "does not allow automatic multiple TOCs; "
11424 "recompile with -mminimal-toc or "
11425 "-fno-optimize-sibling-calls, "
11426 "or make `%s' extern"),
11427 input_bfd,
11428 input_section,
11429 (long) rel->r_offset,
11430 sym_name,
11431 sym_name);
11432 bfd_set_error (bfd_error_bad_value);
11433 ret = FALSE;
11434 }
11435 }
11436
11437 if (can_plt_call
11438 && stub_entry->stub_type == ppc_stub_plt_call)
11439 unresolved_reloc = FALSE;
11440 }
11441
11442 if (stub_entry == NULL
11443 && get_opd_info (sec) != NULL)
11444 {
11445 /* The branch destination is the value of the opd entry. */
11446 bfd_vma off = (relocation + addend
11447 - sec->output_section->vma
11448 - sec->output_offset);
11449 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
11450 if (dest != (bfd_vma) -1)
11451 {
11452 relocation = dest;
11453 addend = 0;
11454 }
11455 }
11456
11457 /* If the branch is out of reach we ought to have a long
11458 branch stub. */
11459 from = (rel->r_offset
11460 + input_section->output_offset
11461 + input_section->output_section->vma);
11462
11463 if (stub_entry == NULL
11464 && (relocation + addend - from + max_br_offset
11465 >= 2 * max_br_offset)
11466 && r_type != R_PPC64_ADDR14_BRTAKEN
11467 && r_type != R_PPC64_ADDR14_BRNTAKEN)
11468 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
11469 htab);
11470
11471 if (stub_entry != NULL)
11472 {
11473 /* Munge up the value and addend so that we call the stub
11474 rather than the procedure directly. */
11475 relocation = (stub_entry->stub_offset
11476 + stub_entry->stub_sec->output_offset
11477 + stub_entry->stub_sec->output_section->vma);
11478 addend = 0;
11479 }
11480
11481 if (insn != 0)
11482 {
11483 if (is_power4)
11484 {
11485 /* Set 'a' bit. This is 0b00010 in BO field for branch
11486 on CR(BI) insns (BO == 001at or 011at), and 0b01000
11487 for branch on CTR insns (BO == 1a00t or 1a01t). */
11488 if ((insn & (0x14 << 21)) == (0x04 << 21))
11489 insn |= 0x02 << 21;
11490 else if ((insn & (0x14 << 21)) == (0x10 << 21))
11491 insn |= 0x08 << 21;
11492 else
11493 break;
11494 }
11495 else
11496 {
11497 /* Invert 'y' bit if not the default. */
11498 if ((bfd_signed_vma) (relocation + addend - from) < 0)
11499 insn ^= 0x01 << 21;
11500 }
11501
11502 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11503 }
11504
11505 /* NOP out calls to undefined weak functions.
11506 We can thus call a weak function without first
11507 checking whether the function is defined. */
11508 else if (h != NULL
11509 && h->elf.root.type == bfd_link_hash_undefweak
11510 && h->elf.dynindx == -1
11511 && r_type == R_PPC64_REL24
11512 && relocation == 0
11513 && addend == 0)
11514 {
11515 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11516 continue;
11517 }
11518 break;
11519 }
11520
11521 /* Set `addend'. */
11522 tls_type = 0;
11523 switch (r_type)
11524 {
11525 default:
11526 (*_bfd_error_handler)
11527 (_("%B: unknown relocation type %d for symbol %s"),
11528 input_bfd, (int) r_type, sym_name);
11529
11530 bfd_set_error (bfd_error_bad_value);
11531 ret = FALSE;
11532 continue;
11533
11534 case R_PPC64_NONE:
11535 case R_PPC64_TLS:
11536 case R_PPC64_TLSGD:
11537 case R_PPC64_TLSLD:
11538 case R_PPC64_GNU_VTINHERIT:
11539 case R_PPC64_GNU_VTENTRY:
11540 continue;
11541
11542 /* GOT16 relocations. Like an ADDR16 using the symbol's
11543 address in the GOT as relocation value instead of the
11544 symbol's value itself. Also, create a GOT entry for the
11545 symbol and put the symbol value there. */
11546 case R_PPC64_GOT_TLSGD16:
11547 case R_PPC64_GOT_TLSGD16_LO:
11548 case R_PPC64_GOT_TLSGD16_HI:
11549 case R_PPC64_GOT_TLSGD16_HA:
11550 tls_type = TLS_TLS | TLS_GD;
11551 goto dogot;
11552
11553 case R_PPC64_GOT_TLSLD16:
11554 case R_PPC64_GOT_TLSLD16_LO:
11555 case R_PPC64_GOT_TLSLD16_HI:
11556 case R_PPC64_GOT_TLSLD16_HA:
11557 tls_type = TLS_TLS | TLS_LD;
11558 goto dogot;
11559
11560 case R_PPC64_GOT_TPREL16_DS:
11561 case R_PPC64_GOT_TPREL16_LO_DS:
11562 case R_PPC64_GOT_TPREL16_HI:
11563 case R_PPC64_GOT_TPREL16_HA:
11564 tls_type = TLS_TLS | TLS_TPREL;
11565 goto dogot;
11566
11567 case R_PPC64_GOT_DTPREL16_DS:
11568 case R_PPC64_GOT_DTPREL16_LO_DS:
11569 case R_PPC64_GOT_DTPREL16_HI:
11570 case R_PPC64_GOT_DTPREL16_HA:
11571 tls_type = TLS_TLS | TLS_DTPREL;
11572 goto dogot;
11573
11574 case R_PPC64_GOT16:
11575 case R_PPC64_GOT16_LO:
11576 case R_PPC64_GOT16_HI:
11577 case R_PPC64_GOT16_HA:
11578 case R_PPC64_GOT16_DS:
11579 case R_PPC64_GOT16_LO_DS:
11580 dogot:
11581 {
11582 /* Relocation is to the entry for this symbol in the global
11583 offset table. */
11584 asection *got;
11585 bfd_vma *offp;
11586 bfd_vma off;
11587 unsigned long indx = 0;
11588
11589 if (tls_type == (TLS_TLS | TLS_LD)
11590 && (h == NULL
11591 || !h->elf.def_dynamic))
11592 offp = &ppc64_tlsld_got (input_bfd)->offset;
11593 else
11594 {
11595 struct got_entry *ent;
11596
11597 if (h != NULL)
11598 {
11599 bfd_boolean dyn = htab->elf.dynamic_sections_created;
11600 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
11601 &h->elf)
11602 || (info->shared
11603 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
11604 /* This is actually a static link, or it is a
11605 -Bsymbolic link and the symbol is defined
11606 locally, or the symbol was forced to be local
11607 because of a version file. */
11608 ;
11609 else
11610 {
11611 indx = h->elf.dynindx;
11612 unresolved_reloc = FALSE;
11613 }
11614 ent = h->elf.got.glist;
11615 }
11616 else
11617 {
11618 if (local_got_ents == NULL)
11619 abort ();
11620 ent = local_got_ents[r_symndx];
11621 }
11622
11623 for (; ent != NULL; ent = ent->next)
11624 if (ent->addend == orig_addend
11625 && ent->owner == input_bfd
11626 && ent->tls_type == tls_type)
11627 break;
11628 if (ent == NULL)
11629 abort ();
11630 offp = &ent->got.offset;
11631 }
11632
11633 got = ppc64_elf_tdata (input_bfd)->got;
11634 if (got == NULL)
11635 abort ();
11636
11637 /* The offset must always be a multiple of 8. We use the
11638 least significant bit to record whether we have already
11639 processed this entry. */
11640 off = *offp;
11641 if ((off & 1) != 0)
11642 off &= ~1;
11643 else
11644 {
11645 /* Generate relocs for the dynamic linker, except in
11646 the case of TLSLD where we'll use one entry per
11647 module. */
11648 asection *relgot;
11649 bfd_boolean ifunc;
11650
11651 *offp = off | 1;
11652 relgot = NULL;
11653 ifunc = (h != NULL
11654 ? h->elf.type == STT_GNU_IFUNC
11655 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
11656 if ((info->shared || indx != 0)
11657 && (offp == &ppc64_tlsld_got (input_bfd)->offset
11658 || h == NULL
11659 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11660 || h->elf.root.type != bfd_link_hash_undefweak))
11661 relgot = ppc64_elf_tdata (input_bfd)->relgot;
11662 else if (ifunc)
11663 relgot = htab->reliplt;
11664 if (relgot != NULL)
11665 {
11666 outrel.r_offset = (got->output_section->vma
11667 + got->output_offset
11668 + off);
11669 outrel.r_addend = addend;
11670 if (tls_type & (TLS_LD | TLS_GD))
11671 {
11672 outrel.r_addend = 0;
11673 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11674 if (tls_type == (TLS_TLS | TLS_GD))
11675 {
11676 loc = relgot->contents;
11677 loc += (relgot->reloc_count++
11678 * sizeof (Elf64_External_Rela));
11679 bfd_elf64_swap_reloca_out (output_bfd,
11680 &outrel, loc);
11681 outrel.r_offset += 8;
11682 outrel.r_addend = addend;
11683 outrel.r_info
11684 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11685 }
11686 }
11687 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11688 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11689 else if (tls_type == (TLS_TLS | TLS_TPREL))
11690 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11691 else if (indx != 0)
11692 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11693 else
11694 {
11695 if (ifunc)
11696 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
11697 else
11698 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11699
11700 /* Write the .got section contents for the sake
11701 of prelink. */
11702 loc = got->contents + off;
11703 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11704 loc);
11705 }
11706
11707 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11708 {
11709 outrel.r_addend += relocation;
11710 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11711 outrel.r_addend -= htab->elf.tls_sec->vma;
11712 }
11713 loc = relgot->contents;
11714 loc += (relgot->reloc_count++
11715 * sizeof (Elf64_External_Rela));
11716 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11717 }
11718
11719 /* Init the .got section contents here if we're not
11720 emitting a reloc. */
11721 else
11722 {
11723 relocation += addend;
11724 if (tls_type == (TLS_TLS | TLS_LD))
11725 relocation = 1;
11726 else if (tls_type != 0)
11727 {
11728 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11729 if (tls_type == (TLS_TLS | TLS_TPREL))
11730 relocation += DTP_OFFSET - TP_OFFSET;
11731
11732 if (tls_type == (TLS_TLS | TLS_GD))
11733 {
11734 bfd_put_64 (output_bfd, relocation,
11735 got->contents + off + 8);
11736 relocation = 1;
11737 }
11738 }
11739
11740 bfd_put_64 (output_bfd, relocation,
11741 got->contents + off);
11742 }
11743 }
11744
11745 if (off >= (bfd_vma) -2)
11746 abort ();
11747
11748 relocation = got->output_offset + off;
11749
11750 /* TOC base (r2) is TOC start plus 0x8000. */
11751 addend = -TOC_BASE_OFF;
11752 }
11753 break;
11754
11755 case R_PPC64_PLT16_HA:
11756 case R_PPC64_PLT16_HI:
11757 case R_PPC64_PLT16_LO:
11758 case R_PPC64_PLT32:
11759 case R_PPC64_PLT64:
11760 /* Relocation is to the entry for this symbol in the
11761 procedure linkage table. */
11762
11763 /* Resolve a PLT reloc against a local symbol directly,
11764 without using the procedure linkage table. */
11765 if (h == NULL)
11766 break;
11767
11768 /* It's possible that we didn't make a PLT entry for this
11769 symbol. This happens when statically linking PIC code,
11770 or when using -Bsymbolic. Go find a match if there is a
11771 PLT entry. */
11772 if (htab->plt != NULL)
11773 {
11774 struct plt_entry *ent;
11775 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11776 if (ent->addend == orig_addend
11777 && ent->plt.offset != (bfd_vma) -1)
11778 {
11779 relocation = (htab->plt->output_section->vma
11780 + htab->plt->output_offset
11781 + ent->plt.offset);
11782 unresolved_reloc = FALSE;
11783 }
11784 }
11785 break;
11786
11787 case R_PPC64_TOC:
11788 /* Relocation value is TOC base. */
11789 relocation = TOCstart;
11790 if (r_symndx == 0)
11791 relocation += htab->stub_group[input_section->id].toc_off;
11792 else if (unresolved_reloc)
11793 ;
11794 else if (sec != NULL && sec->id <= htab->top_id)
11795 relocation += htab->stub_group[sec->id].toc_off;
11796 else
11797 unresolved_reloc = TRUE;
11798 goto dodyn;
11799
11800 /* TOC16 relocs. We want the offset relative to the TOC base,
11801 which is the address of the start of the TOC plus 0x8000.
11802 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11803 in this order. */
11804 case R_PPC64_TOC16:
11805 case R_PPC64_TOC16_LO:
11806 case R_PPC64_TOC16_HI:
11807 case R_PPC64_TOC16_DS:
11808 case R_PPC64_TOC16_LO_DS:
11809 case R_PPC64_TOC16_HA:
11810 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11811 break;
11812
11813 /* Relocate against the beginning of the section. */
11814 case R_PPC64_SECTOFF:
11815 case R_PPC64_SECTOFF_LO:
11816 case R_PPC64_SECTOFF_HI:
11817 case R_PPC64_SECTOFF_DS:
11818 case R_PPC64_SECTOFF_LO_DS:
11819 case R_PPC64_SECTOFF_HA:
11820 if (sec != NULL)
11821 addend -= sec->output_section->vma;
11822 break;
11823
11824 case R_PPC64_REL16:
11825 case R_PPC64_REL16_LO:
11826 case R_PPC64_REL16_HI:
11827 case R_PPC64_REL16_HA:
11828 break;
11829
11830 case R_PPC64_REL14:
11831 case R_PPC64_REL14_BRNTAKEN:
11832 case R_PPC64_REL14_BRTAKEN:
11833 case R_PPC64_REL24:
11834 break;
11835
11836 case R_PPC64_TPREL16:
11837 case R_PPC64_TPREL16_LO:
11838 case R_PPC64_TPREL16_HI:
11839 case R_PPC64_TPREL16_HA:
11840 case R_PPC64_TPREL16_DS:
11841 case R_PPC64_TPREL16_LO_DS:
11842 case R_PPC64_TPREL16_HIGHER:
11843 case R_PPC64_TPREL16_HIGHERA:
11844 case R_PPC64_TPREL16_HIGHEST:
11845 case R_PPC64_TPREL16_HIGHESTA:
11846 if (h != NULL
11847 && h->elf.root.type == bfd_link_hash_undefweak
11848 && h->elf.dynindx == -1)
11849 {
11850 /* Make this relocation against an undefined weak symbol
11851 resolve to zero. This is really just a tweak, since
11852 code using weak externs ought to check that they are
11853 defined before using them. */
11854 bfd_byte *p = contents + rel->r_offset - d_offset;
11855
11856 insn = bfd_get_32 (output_bfd, p);
11857 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
11858 if (insn != 0)
11859 bfd_put_32 (output_bfd, insn, p);
11860 break;
11861 }
11862 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11863 if (info->shared)
11864 /* The TPREL16 relocs shouldn't really be used in shared
11865 libs as they will result in DT_TEXTREL being set, but
11866 support them anyway. */
11867 goto dodyn;
11868 break;
11869
11870 case R_PPC64_DTPREL16:
11871 case R_PPC64_DTPREL16_LO:
11872 case R_PPC64_DTPREL16_HI:
11873 case R_PPC64_DTPREL16_HA:
11874 case R_PPC64_DTPREL16_DS:
11875 case R_PPC64_DTPREL16_LO_DS:
11876 case R_PPC64_DTPREL16_HIGHER:
11877 case R_PPC64_DTPREL16_HIGHERA:
11878 case R_PPC64_DTPREL16_HIGHEST:
11879 case R_PPC64_DTPREL16_HIGHESTA:
11880 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11881 break;
11882
11883 case R_PPC64_DTPMOD64:
11884 relocation = 1;
11885 addend = 0;
11886 goto dodyn;
11887
11888 case R_PPC64_TPREL64:
11889 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11890 goto dodyn;
11891
11892 case R_PPC64_DTPREL64:
11893 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11894 /* Fall thru */
11895
11896 /* Relocations that may need to be propagated if this is a
11897 dynamic object. */
11898 case R_PPC64_REL30:
11899 case R_PPC64_REL32:
11900 case R_PPC64_REL64:
11901 case R_PPC64_ADDR14:
11902 case R_PPC64_ADDR14_BRNTAKEN:
11903 case R_PPC64_ADDR14_BRTAKEN:
11904 case R_PPC64_ADDR16:
11905 case R_PPC64_ADDR16_DS:
11906 case R_PPC64_ADDR16_HA:
11907 case R_PPC64_ADDR16_HI:
11908 case R_PPC64_ADDR16_HIGHER:
11909 case R_PPC64_ADDR16_HIGHERA:
11910 case R_PPC64_ADDR16_HIGHEST:
11911 case R_PPC64_ADDR16_HIGHESTA:
11912 case R_PPC64_ADDR16_LO:
11913 case R_PPC64_ADDR16_LO_DS:
11914 case R_PPC64_ADDR24:
11915 case R_PPC64_ADDR32:
11916 case R_PPC64_ADDR64:
11917 case R_PPC64_UADDR16:
11918 case R_PPC64_UADDR32:
11919 case R_PPC64_UADDR64:
11920 dodyn:
11921 if ((input_section->flags & SEC_ALLOC) == 0)
11922 break;
11923
11924 if (NO_OPD_RELOCS && is_opd)
11925 break;
11926
11927 if ((info->shared
11928 && (h == NULL
11929 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11930 || h->elf.root.type != bfd_link_hash_undefweak)
11931 && (must_be_dyn_reloc (info, r_type)
11932 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11933 || (ELIMINATE_COPY_RELOCS
11934 && !info->shared
11935 && h != NULL
11936 && h->elf.dynindx != -1
11937 && !h->elf.non_got_ref
11938 && !h->elf.def_regular)
11939 || (!info->shared
11940 && (h != NULL
11941 ? h->elf.type == STT_GNU_IFUNC
11942 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
11943 {
11944 bfd_boolean skip, relocate;
11945 asection *sreloc;
11946 bfd_vma out_off;
11947
11948 /* When generating a dynamic object, these relocations
11949 are copied into the output file to be resolved at run
11950 time. */
11951
11952 skip = FALSE;
11953 relocate = FALSE;
11954
11955 out_off = _bfd_elf_section_offset (output_bfd, info,
11956 input_section, rel->r_offset);
11957 if (out_off == (bfd_vma) -1)
11958 skip = TRUE;
11959 else if (out_off == (bfd_vma) -2)
11960 skip = TRUE, relocate = TRUE;
11961 out_off += (input_section->output_section->vma
11962 + input_section->output_offset);
11963 outrel.r_offset = out_off;
11964 outrel.r_addend = rel->r_addend;
11965
11966 /* Optimize unaligned reloc use. */
11967 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11968 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11969 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11970 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11971 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11972 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11973 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11974 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11975 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11976
11977 if (skip)
11978 memset (&outrel, 0, sizeof outrel);
11979 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11980 && !is_opd
11981 && r_type != R_PPC64_TOC)
11982 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11983 else
11984 {
11985 /* This symbol is local, or marked to become local,
11986 or this is an opd section reloc which must point
11987 at a local function. */
11988 outrel.r_addend += relocation;
11989 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11990 {
11991 if (is_opd && h != NULL)
11992 {
11993 /* Lie about opd entries. This case occurs
11994 when building shared libraries and we
11995 reference a function in another shared
11996 lib. The same thing happens for a weak
11997 definition in an application that's
11998 overridden by a strong definition in a
11999 shared lib. (I believe this is a generic
12000 bug in binutils handling of weak syms.)
12001 In these cases we won't use the opd
12002 entry in this lib. */
12003 unresolved_reloc = FALSE;
12004 }
12005 if (!is_opd
12006 && r_type == R_PPC64_ADDR64
12007 && (h != NULL
12008 ? h->elf.type == STT_GNU_IFUNC
12009 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
12010 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12011 else
12012 {
12013 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12014
12015 /* We need to relocate .opd contents for ld.so.
12016 Prelink also wants simple and consistent rules
12017 for relocs. This make all RELATIVE relocs have
12018 *r_offset equal to r_addend. */
12019 relocate = TRUE;
12020 }
12021 }
12022 else
12023 {
12024 long indx = 0;
12025
12026 if (h != NULL
12027 ? h->elf.type == STT_GNU_IFUNC
12028 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
12029 {
12030 (*_bfd_error_handler)
12031 (_("%B(%A+0x%lx): relocation %s for indirect "
12032 "function %s unsupported"),
12033 input_bfd,
12034 input_section,
12035 (long) rel->r_offset,
12036 ppc64_elf_howto_table[r_type]->name,
12037 sym_name);
12038 ret = FALSE;
12039 }
12040 else if (r_symndx == 0 || bfd_is_abs_section (sec))
12041 ;
12042 else if (sec == NULL || sec->owner == NULL)
12043 {
12044 bfd_set_error (bfd_error_bad_value);
12045 return FALSE;
12046 }
12047 else
12048 {
12049 asection *osec;
12050
12051 osec = sec->output_section;
12052 indx = elf_section_data (osec)->dynindx;
12053
12054 if (indx == 0)
12055 {
12056 if ((osec->flags & SEC_READONLY) == 0
12057 && htab->elf.data_index_section != NULL)
12058 osec = htab->elf.data_index_section;
12059 else
12060 osec = htab->elf.text_index_section;
12061 indx = elf_section_data (osec)->dynindx;
12062 }
12063 BFD_ASSERT (indx != 0);
12064
12065 /* We are turning this relocation into one
12066 against a section symbol, so subtract out
12067 the output section's address but not the
12068 offset of the input section in the output
12069 section. */
12070 outrel.r_addend -= osec->vma;
12071 }
12072
12073 outrel.r_info = ELF64_R_INFO (indx, r_type);
12074 }
12075 }
12076
12077 sreloc = elf_section_data (input_section)->sreloc;
12078 if (!htab->elf.dynamic_sections_created)
12079 sreloc = htab->reliplt;
12080 if (sreloc == NULL)
12081 abort ();
12082
12083 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
12084 >= sreloc->size)
12085 abort ();
12086 loc = sreloc->contents;
12087 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
12088 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12089
12090 /* If this reloc is against an external symbol, it will
12091 be computed at runtime, so there's no need to do
12092 anything now. However, for the sake of prelink ensure
12093 that the section contents are a known value. */
12094 if (! relocate)
12095 {
12096 unresolved_reloc = FALSE;
12097 /* The value chosen here is quite arbitrary as ld.so
12098 ignores section contents except for the special
12099 case of .opd where the contents might be accessed
12100 before relocation. Choose zero, as that won't
12101 cause reloc overflow. */
12102 relocation = 0;
12103 addend = 0;
12104 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
12105 to improve backward compatibility with older
12106 versions of ld. */
12107 if (r_type == R_PPC64_ADDR64)
12108 addend = outrel.r_addend;
12109 /* Adjust pc_relative relocs to have zero in *r_offset. */
12110 else if (ppc64_elf_howto_table[r_type]->pc_relative)
12111 addend = (input_section->output_section->vma
12112 + input_section->output_offset
12113 + rel->r_offset);
12114 }
12115 }
12116 break;
12117
12118 case R_PPC64_COPY:
12119 case R_PPC64_GLOB_DAT:
12120 case R_PPC64_JMP_SLOT:
12121 case R_PPC64_JMP_IREL:
12122 case R_PPC64_RELATIVE:
12123 /* We shouldn't ever see these dynamic relocs in relocatable
12124 files. */
12125 /* Fall through. */
12126
12127 case R_PPC64_PLTGOT16:
12128 case R_PPC64_PLTGOT16_DS:
12129 case R_PPC64_PLTGOT16_HA:
12130 case R_PPC64_PLTGOT16_HI:
12131 case R_PPC64_PLTGOT16_LO:
12132 case R_PPC64_PLTGOT16_LO_DS:
12133 case R_PPC64_PLTREL32:
12134 case R_PPC64_PLTREL64:
12135 /* These ones haven't been implemented yet. */
12136
12137 (*_bfd_error_handler)
12138 (_("%B: relocation %s is not supported for symbol %s."),
12139 input_bfd,
12140 ppc64_elf_howto_table[r_type]->name, sym_name);
12141
12142 bfd_set_error (bfd_error_invalid_operation);
12143 ret = FALSE;
12144 continue;
12145 }
12146
12147 /* Do any further special processing. */
12148 switch (r_type)
12149 {
12150 default:
12151 break;
12152
12153 case R_PPC64_ADDR16_HA:
12154 case R_PPC64_REL16_HA:
12155 case R_PPC64_ADDR16_HIGHERA:
12156 case R_PPC64_ADDR16_HIGHESTA:
12157 case R_PPC64_TOC16_HA:
12158 case R_PPC64_SECTOFF_HA:
12159 case R_PPC64_TPREL16_HA:
12160 case R_PPC64_DTPREL16_HA:
12161 case R_PPC64_TPREL16_HIGHER:
12162 case R_PPC64_TPREL16_HIGHERA:
12163 case R_PPC64_TPREL16_HIGHEST:
12164 case R_PPC64_TPREL16_HIGHESTA:
12165 case R_PPC64_DTPREL16_HIGHER:
12166 case R_PPC64_DTPREL16_HIGHERA:
12167 case R_PPC64_DTPREL16_HIGHEST:
12168 case R_PPC64_DTPREL16_HIGHESTA:
12169 /* It's just possible that this symbol is a weak symbol
12170 that's not actually defined anywhere. In that case,
12171 'sec' would be NULL, and we should leave the symbol
12172 alone (it will be set to zero elsewhere in the link). */
12173 if (sec == NULL)
12174 break;
12175 /* Fall thru */
12176
12177 case R_PPC64_GOT16_HA:
12178 case R_PPC64_PLTGOT16_HA:
12179 case R_PPC64_PLT16_HA:
12180 case R_PPC64_GOT_TLSGD16_HA:
12181 case R_PPC64_GOT_TLSLD16_HA:
12182 case R_PPC64_GOT_TPREL16_HA:
12183 case R_PPC64_GOT_DTPREL16_HA:
12184 /* Add 0x10000 if sign bit in 0:15 is set.
12185 Bits 0:15 are not used. */
12186 addend += 0x8000;
12187 break;
12188
12189 case R_PPC64_ADDR16_DS:
12190 case R_PPC64_ADDR16_LO_DS:
12191 case R_PPC64_GOT16_DS:
12192 case R_PPC64_GOT16_LO_DS:
12193 case R_PPC64_PLT16_LO_DS:
12194 case R_PPC64_SECTOFF_DS:
12195 case R_PPC64_SECTOFF_LO_DS:
12196 case R_PPC64_TOC16_DS:
12197 case R_PPC64_TOC16_LO_DS:
12198 case R_PPC64_PLTGOT16_DS:
12199 case R_PPC64_PLTGOT16_LO_DS:
12200 case R_PPC64_GOT_TPREL16_DS:
12201 case R_PPC64_GOT_TPREL16_LO_DS:
12202 case R_PPC64_GOT_DTPREL16_DS:
12203 case R_PPC64_GOT_DTPREL16_LO_DS:
12204 case R_PPC64_TPREL16_DS:
12205 case R_PPC64_TPREL16_LO_DS:
12206 case R_PPC64_DTPREL16_DS:
12207 case R_PPC64_DTPREL16_LO_DS:
12208 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
12209 mask = 3;
12210 /* If this reloc is against an lq insn, then the value must be
12211 a multiple of 16. This is somewhat of a hack, but the
12212 "correct" way to do this by defining _DQ forms of all the
12213 _DS relocs bloats all reloc switches in this file. It
12214 doesn't seem to make much sense to use any of these relocs
12215 in data, so testing the insn should be safe. */
12216 if ((insn & (0x3f << 26)) == (56u << 26))
12217 mask = 15;
12218 if (((relocation + addend) & mask) != 0)
12219 {
12220 (*_bfd_error_handler)
12221 (_("%B: error: relocation %s not a multiple of %d"),
12222 input_bfd,
12223 ppc64_elf_howto_table[r_type]->name,
12224 mask + 1);
12225 bfd_set_error (bfd_error_bad_value);
12226 ret = FALSE;
12227 continue;
12228 }
12229 break;
12230 }
12231
12232 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
12233 because such sections are not SEC_ALLOC and thus ld.so will
12234 not process them. */
12235 if (unresolved_reloc
12236 && !((input_section->flags & SEC_DEBUGGING) != 0
12237 && h->elf.def_dynamic))
12238 {
12239 (*_bfd_error_handler)
12240 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
12241 input_bfd,
12242 input_section,
12243 (long) rel->r_offset,
12244 ppc64_elf_howto_table[(int) r_type]->name,
12245 h->elf.root.root.string);
12246 ret = FALSE;
12247 }
12248
12249 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
12250 input_bfd,
12251 input_section,
12252 contents,
12253 rel->r_offset,
12254 relocation,
12255 addend);
12256
12257 if (r != bfd_reloc_ok)
12258 {
12259 if (sym_name == NULL)
12260 sym_name = "(null)";
12261 if (r == bfd_reloc_overflow)
12262 {
12263 if (warned)
12264 continue;
12265 if (h != NULL
12266 && h->elf.root.type == bfd_link_hash_undefweak
12267 && ppc64_elf_howto_table[r_type]->pc_relative)
12268 {
12269 /* Assume this is a call protected by other code that
12270 detects the symbol is undefined. If this is the case,
12271 we can safely ignore the overflow. If not, the
12272 program is hosed anyway, and a little warning isn't
12273 going to help. */
12274
12275 continue;
12276 }
12277
12278 if (!((*info->callbacks->reloc_overflow)
12279 (info, (h ? &h->elf.root : NULL), sym_name,
12280 ppc64_elf_howto_table[r_type]->name,
12281 orig_addend, input_bfd, input_section, rel->r_offset)))
12282 return FALSE;
12283 }
12284 else
12285 {
12286 (*_bfd_error_handler)
12287 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
12288 input_bfd,
12289 input_section,
12290 (long) rel->r_offset,
12291 ppc64_elf_howto_table[r_type]->name,
12292 sym_name,
12293 (int) r);
12294 ret = FALSE;
12295 }
12296 }
12297 }
12298
12299 /* If we're emitting relocations, then shortly after this function
12300 returns, reloc offsets and addends for this section will be
12301 adjusted. Worse, reloc symbol indices will be for the output
12302 file rather than the input. Save a copy of the relocs for
12303 opd_entry_value. */
12304 if (is_opd && (info->emitrelocations || info->relocatable))
12305 {
12306 bfd_size_type amt;
12307 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
12308 rel = bfd_alloc (input_bfd, amt);
12309 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
12310 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
12311 if (rel == NULL)
12312 return FALSE;
12313 memcpy (rel, relocs, amt);
12314 }
12315 return ret;
12316 }
12317
12318 /* Adjust the value of any local symbols in opd sections. */
12319
12320 static int
12321 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
12322 const char *name ATTRIBUTE_UNUSED,
12323 Elf_Internal_Sym *elfsym,
12324 asection *input_sec,
12325 struct elf_link_hash_entry *h)
12326 {
12327 struct _opd_sec_data *opd;
12328 long adjust;
12329 bfd_vma value;
12330
12331 if (h != NULL)
12332 return 1;
12333
12334 opd = get_opd_info (input_sec);
12335 if (opd == NULL || opd->adjust == NULL)
12336 return 1;
12337
12338 value = elfsym->st_value - input_sec->output_offset;
12339 if (!info->relocatable)
12340 value -= input_sec->output_section->vma;
12341
12342 adjust = opd->adjust[value / 8];
12343 if (adjust == -1)
12344 return 2;
12345
12346 elfsym->st_value += adjust;
12347 return 1;
12348 }
12349
12350 /* Finish up dynamic symbol handling. We set the contents of various
12351 dynamic sections here. */
12352
12353 static bfd_boolean
12354 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
12355 struct bfd_link_info *info,
12356 struct elf_link_hash_entry *h,
12357 Elf_Internal_Sym *sym)
12358 {
12359 struct ppc_link_hash_table *htab;
12360 struct plt_entry *ent;
12361 Elf_Internal_Rela rela;
12362 bfd_byte *loc;
12363
12364 htab = ppc_hash_table (info);
12365
12366 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
12367 if (ent->plt.offset != (bfd_vma) -1)
12368 {
12369 /* This symbol has an entry in the procedure linkage
12370 table. Set it up. */
12371 if (!htab->elf.dynamic_sections_created
12372 || h->dynindx == -1)
12373 {
12374 BFD_ASSERT (h->type == STT_GNU_IFUNC
12375 && h->def_regular
12376 && (h->root.type == bfd_link_hash_defined
12377 || h->root.type == bfd_link_hash_defweak));
12378 rela.r_offset = (htab->iplt->output_section->vma
12379 + htab->iplt->output_offset
12380 + ent->plt.offset);
12381 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
12382 rela.r_addend = (h->root.u.def.value
12383 + h->root.u.def.section->output_offset
12384 + h->root.u.def.section->output_section->vma
12385 + ent->addend);
12386 loc = (htab->reliplt->contents
12387 + (htab->reliplt->reloc_count++
12388 * sizeof (Elf64_External_Rela)));
12389 }
12390 else
12391 {
12392 rela.r_offset = (htab->plt->output_section->vma
12393 + htab->plt->output_offset
12394 + ent->plt.offset);
12395 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
12396 rela.r_addend = ent->addend;
12397 loc = (htab->relplt->contents
12398 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
12399 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
12400 }
12401 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12402 }
12403
12404 if (h->needs_copy)
12405 {
12406 /* This symbol needs a copy reloc. Set it up. */
12407
12408 if (h->dynindx == -1
12409 || (h->root.type != bfd_link_hash_defined
12410 && h->root.type != bfd_link_hash_defweak)
12411 || htab->relbss == NULL)
12412 abort ();
12413
12414 rela.r_offset = (h->root.u.def.value
12415 + h->root.u.def.section->output_section->vma
12416 + h->root.u.def.section->output_offset);
12417 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
12418 rela.r_addend = 0;
12419 loc = htab->relbss->contents;
12420 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
12421 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
12422 }
12423
12424 /* Mark some specially defined symbols as absolute. */
12425 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
12426 sym->st_shndx = SHN_ABS;
12427
12428 return TRUE;
12429 }
12430
12431 /* Used to decide how to sort relocs in an optimal manner for the
12432 dynamic linker, before writing them out. */
12433
12434 static enum elf_reloc_type_class
12435 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
12436 {
12437 enum elf_ppc64_reloc_type r_type;
12438
12439 r_type = ELF64_R_TYPE (rela->r_info);
12440 switch (r_type)
12441 {
12442 case R_PPC64_RELATIVE:
12443 return reloc_class_relative;
12444 case R_PPC64_JMP_SLOT:
12445 return reloc_class_plt;
12446 case R_PPC64_COPY:
12447 return reloc_class_copy;
12448 default:
12449 return reloc_class_normal;
12450 }
12451 }
12452
12453 /* Finish up the dynamic sections. */
12454
12455 static bfd_boolean
12456 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
12457 struct bfd_link_info *info)
12458 {
12459 struct ppc_link_hash_table *htab;
12460 bfd *dynobj;
12461 asection *sdyn;
12462
12463 htab = ppc_hash_table (info);
12464 dynobj = htab->elf.dynobj;
12465 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
12466
12467 if (htab->elf.dynamic_sections_created)
12468 {
12469 Elf64_External_Dyn *dyncon, *dynconend;
12470
12471 if (sdyn == NULL || htab->got == NULL)
12472 abort ();
12473
12474 dyncon = (Elf64_External_Dyn *) sdyn->contents;
12475 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
12476 for (; dyncon < dynconend; dyncon++)
12477 {
12478 Elf_Internal_Dyn dyn;
12479 asection *s;
12480
12481 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
12482
12483 switch (dyn.d_tag)
12484 {
12485 default:
12486 continue;
12487
12488 case DT_PPC64_GLINK:
12489 s = htab->glink;
12490 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12491 /* We stupidly defined DT_PPC64_GLINK to be the start
12492 of glink rather than the first entry point, which is
12493 what ld.so needs, and now have a bigger stub to
12494 support automatic multiple TOCs. */
12495 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
12496 break;
12497
12498 case DT_PPC64_OPD:
12499 s = bfd_get_section_by_name (output_bfd, ".opd");
12500 if (s == NULL)
12501 continue;
12502 dyn.d_un.d_ptr = s->vma;
12503 break;
12504
12505 case DT_PPC64_OPDSZ:
12506 s = bfd_get_section_by_name (output_bfd, ".opd");
12507 if (s == NULL)
12508 continue;
12509 dyn.d_un.d_val = s->size;
12510 break;
12511
12512 case DT_PLTGOT:
12513 s = htab->plt;
12514 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12515 break;
12516
12517 case DT_JMPREL:
12518 s = htab->relplt;
12519 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
12520 break;
12521
12522 case DT_PLTRELSZ:
12523 dyn.d_un.d_val = htab->relplt->size;
12524 break;
12525
12526 case DT_RELASZ:
12527 /* Don't count procedure linkage table relocs in the
12528 overall reloc count. */
12529 s = htab->relplt;
12530 if (s == NULL)
12531 continue;
12532 dyn.d_un.d_val -= s->size;
12533 break;
12534
12535 case DT_RELA:
12536 /* We may not be using the standard ELF linker script.
12537 If .rela.plt is the first .rela section, we adjust
12538 DT_RELA to not include it. */
12539 s = htab->relplt;
12540 if (s == NULL)
12541 continue;
12542 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
12543 continue;
12544 dyn.d_un.d_ptr += s->size;
12545 break;
12546 }
12547
12548 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
12549 }
12550 }
12551
12552 if (htab->got != NULL && htab->got->size != 0)
12553 {
12554 /* Fill in the first entry in the global offset table.
12555 We use it to hold the link-time TOCbase. */
12556 bfd_put_64 (output_bfd,
12557 elf_gp (output_bfd) + TOC_BASE_OFF,
12558 htab->got->contents);
12559
12560 /* Set .got entry size. */
12561 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
12562 }
12563
12564 if (htab->plt != NULL && htab->plt->size != 0)
12565 {
12566 /* Set .plt entry size. */
12567 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
12568 = PLT_ENTRY_SIZE;
12569 }
12570
12571 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
12572 brlt ourselves if emitrelocations. */
12573 if (htab->brlt != NULL
12574 && htab->brlt->reloc_count != 0
12575 && !_bfd_elf_link_output_relocs (output_bfd,
12576 htab->brlt,
12577 &elf_section_data (htab->brlt)->rel_hdr,
12578 elf_section_data (htab->brlt)->relocs,
12579 NULL))
12580 return FALSE;
12581
12582 if (htab->glink != NULL
12583 && htab->glink->reloc_count != 0
12584 && !_bfd_elf_link_output_relocs (output_bfd,
12585 htab->glink,
12586 &elf_section_data (htab->glink)->rel_hdr,
12587 elf_section_data (htab->glink)->relocs,
12588 NULL))
12589 return FALSE;
12590
12591 /* We need to handle writing out multiple GOT sections ourselves,
12592 since we didn't add them to DYNOBJ. We know dynobj is the first
12593 bfd. */
12594 while ((dynobj = dynobj->link_next) != NULL)
12595 {
12596 asection *s;
12597
12598 if (!is_ppc64_elf (dynobj))
12599 continue;
12600
12601 s = ppc64_elf_tdata (dynobj)->got;
12602 if (s != NULL
12603 && s->size != 0
12604 && s->output_section != bfd_abs_section_ptr
12605 && !bfd_set_section_contents (output_bfd, s->output_section,
12606 s->contents, s->output_offset,
12607 s->size))
12608 return FALSE;
12609 s = ppc64_elf_tdata (dynobj)->relgot;
12610 if (s != NULL
12611 && s->size != 0
12612 && s->output_section != bfd_abs_section_ptr
12613 && !bfd_set_section_contents (output_bfd, s->output_section,
12614 s->contents, s->output_offset,
12615 s->size))
12616 return FALSE;
12617 }
12618
12619 return TRUE;
12620 }
12621
12622 #include "elf64-target.h"
GDB Binutils - Deliverables
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