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2009-06-18 Dave Korn <dave.korn.cygwin@gmail.com>
[binutils.git] / bfd / elf64-ppc.c
blobe68edf1d379b029696a7fef4a7bcebe954567243
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009 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 <amodra@bigpond.net.au>
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
116 /* The name of the dynamic interpreter. This is put in the .interp
117 section. */
118 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
119
120 /* The size in bytes of an entry in the procedure linkage table. */
121 #define PLT_ENTRY_SIZE 24
122
123 /* The initial size of the plt reserved for the dynamic linker. */
124 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
125
126 /* TOC base pointers offset from start of TOC. */
127 #define TOC_BASE_OFF 0x8000
128
129 /* Offset of tp and dtp pointers from start of TLS block. */
130 #define TP_OFFSET 0x7000
131 #define DTP_OFFSET 0x8000
132
133 /* .plt call stub instructions. The normal stub is like this, but
134 sometimes the .plt entry crosses a 64k boundary and we need to
135 insert an addi to adjust r12. */
136 #define PLT_CALL_STUB_SIZE (7*4)
137 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
138 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
139 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
140 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
141 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
142 /* ld %r11,xxx+16@l(%r12) */
143 #define BCTR 0x4e800420 /* bctr */
144
145
146 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
147 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
148 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
149 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
150
151 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
152 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
153
154 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
155
156 /* glink call stub instructions. We enter with the index in R0. */
157 #define GLINK_CALL_STUB_SIZE (16*4)
158 /* 0: */
159 /* .quad plt0-1f */
160 /* __glink: */
161 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
162 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
163 /* 1: */
164 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
165 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
166 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
167 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
168 /* ld %11,0(%12) */
169 /* ld %2,8(%12) */
170 /* mtctr %11 */
171 /* ld %11,16(%12) */
172 /* bctr */
173
174 /* Pad with this. */
175 #define NOP 0x60000000
176
177 /* Some other nops. */
178 #define CROR_151515 0x4def7b82
179 #define CROR_313131 0x4ffffb82
180
181 /* .glink entries for the first 32k functions are two instructions. */
182 #define LI_R0_0 0x38000000 /* li %r0,0 */
183 #define B_DOT 0x48000000 /* b . */
184
185 /* After that, we need two instructions to load the index, followed by
186 a branch. */
187 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
188 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
189
190 /* Instructions used by the save and restore reg functions. */
191 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
192 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
193 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
194 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
195 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
196 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
197 #define LI_R12_0 0x39800000 /* li %r12,0 */
198 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
199 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
200 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
201 #define BLR 0x4e800020 /* blr */
202
203 /* Since .opd is an array of descriptors and each entry will end up
204 with identical R_PPC64_RELATIVE relocs, there is really no need to
205 propagate .opd relocs; The dynamic linker should be taught to
206 relocate .opd without reloc entries. */
207 #ifndef NO_OPD_RELOCS
208 #define NO_OPD_RELOCS 0
209 #endif
210 \f
211 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
212
213 /* Relocation HOWTO's. */
214 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
215
216 static reloc_howto_type ppc64_elf_howto_raw[] = {
217 /* This reloc does nothing. */
218 HOWTO (R_PPC64_NONE, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 32, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_dont, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC64_NONE", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 32 bit relocation. */
233 HOWTO (R_PPC64_ADDR32, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC64_ADDR32", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* An absolute 26 bit branch; the lower two bits must be zero.
248 FIXME: we don't check that, we just clear them. */
249 HOWTO (R_PPC64_ADDR24, /* type */
250 0, /* rightshift */
251 2, /* size (0 = byte, 1 = short, 2 = long) */
252 26, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_bitfield, /* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC64_ADDR24", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0x03fffffc, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* A standard 16 bit relocation. */
264 HOWTO (R_PPC64_ADDR16, /* type */
265 0, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_bitfield, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC64_ADDR16", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* A 16 bit relocation without overflow. */
279 HOWTO (R_PPC64_ADDR16_LO, /* type */
280 0, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont,/* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC64_ADDR16_LO", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* Bits 16-31 of an address. */
294 HOWTO (R_PPC64_ADDR16_HI, /* type */
295 16, /* rightshift */
296 1, /* size (0 = byte, 1 = short, 2 = long) */
297 16, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_dont, /* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_PPC64_ADDR16_HI", /* name */
303 FALSE, /* partial_inplace */
304 0, /* src_mask */
305 0xffff, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
309 bits, treated as a signed number, is negative. */
310 HOWTO (R_PPC64_ADDR16_HA, /* type */
311 16, /* rightshift */
312 1, /* size (0 = byte, 1 = short, 2 = long) */
313 16, /* bitsize */
314 FALSE, /* pc_relative */
315 0, /* bitpos */
316 complain_overflow_dont, /* complain_on_overflow */
317 ppc64_elf_ha_reloc, /* special_function */
318 "R_PPC64_ADDR16_HA", /* name */
319 FALSE, /* partial_inplace */
320 0, /* src_mask */
321 0xffff, /* dst_mask */
322 FALSE), /* pcrel_offset */
323
324 /* An absolute 16 bit branch; the lower two bits must be zero.
325 FIXME: we don't check that, we just clear them. */
326 HOWTO (R_PPC64_ADDR14, /* type */
327 0, /* rightshift */
328 2, /* size (0 = byte, 1 = short, 2 = long) */
329 16, /* bitsize */
330 FALSE, /* pc_relative */
331 0, /* bitpos */
332 complain_overflow_bitfield, /* complain_on_overflow */
333 ppc64_elf_branch_reloc, /* special_function */
334 "R_PPC64_ADDR14", /* name */
335 FALSE, /* partial_inplace */
336 0, /* src_mask */
337 0x0000fffc, /* dst_mask */
338 FALSE), /* pcrel_offset */
339
340 /* An absolute 16 bit branch, for which bit 10 should be set to
341 indicate that the branch is expected to be taken. The lower two
342 bits must be zero. */
343 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 FALSE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_bitfield, /* complain_on_overflow */
350 ppc64_elf_brtaken_reloc, /* special_function */
351 "R_PPC64_ADDR14_BRTAKEN",/* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0x0000fffc, /* dst_mask */
355 FALSE), /* pcrel_offset */
356
357 /* An absolute 16 bit branch, for which bit 10 should be set to
358 indicate that the branch is not expected to be taken. The lower
359 two bits must be zero. */
360 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 FALSE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_bitfield, /* complain_on_overflow */
367 ppc64_elf_brtaken_reloc, /* special_function */
368 "R_PPC64_ADDR14_BRNTAKEN",/* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0x0000fffc, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* A relative 26 bit branch; the lower two bits must be zero. */
375 HOWTO (R_PPC64_REL24, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 26, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_signed, /* complain_on_overflow */
382 ppc64_elf_branch_reloc, /* special_function */
383 "R_PPC64_REL24", /* name */
384 FALSE, /* partial_inplace */
385 0, /* src_mask */
386 0x03fffffc, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 /* A relative 16 bit branch; the lower two bits must be zero. */
390 HOWTO (R_PPC64_REL14, /* type */
391 0, /* rightshift */
392 2, /* size (0 = byte, 1 = short, 2 = long) */
393 16, /* bitsize */
394 TRUE, /* pc_relative */
395 0, /* bitpos */
396 complain_overflow_signed, /* complain_on_overflow */
397 ppc64_elf_branch_reloc, /* special_function */
398 "R_PPC64_REL14", /* name */
399 FALSE, /* partial_inplace */
400 0, /* src_mask */
401 0x0000fffc, /* dst_mask */
402 TRUE), /* pcrel_offset */
403
404 /* A relative 16 bit branch. Bit 10 should be set to indicate that
405 the branch is expected to be taken. The lower two bits must be
406 zero. */
407 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
408 0, /* rightshift */
409 2, /* size (0 = byte, 1 = short, 2 = long) */
410 16, /* bitsize */
411 TRUE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_signed, /* complain_on_overflow */
414 ppc64_elf_brtaken_reloc, /* special_function */
415 "R_PPC64_REL14_BRTAKEN", /* name */
416 FALSE, /* partial_inplace */
417 0, /* src_mask */
418 0x0000fffc, /* dst_mask */
419 TRUE), /* pcrel_offset */
420
421 /* A relative 16 bit branch. Bit 10 should be set to indicate that
422 the branch is not expected to be taken. The lower two bits must
423 be zero. */
424 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
425 0, /* rightshift */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
427 16, /* bitsize */
428 TRUE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_signed, /* complain_on_overflow */
431 ppc64_elf_brtaken_reloc, /* special_function */
432 "R_PPC64_REL14_BRNTAKEN",/* name */
433 FALSE, /* partial_inplace */
434 0, /* src_mask */
435 0x0000fffc, /* dst_mask */
436 TRUE), /* pcrel_offset */
437
438 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
439 symbol. */
440 HOWTO (R_PPC64_GOT16, /* type */
441 0, /* rightshift */
442 1, /* size (0 = byte, 1 = short, 2 = long) */
443 16, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_signed, /* complain_on_overflow */
447 ppc64_elf_unhandled_reloc, /* special_function */
448 "R_PPC64_GOT16", /* name */
449 FALSE, /* partial_inplace */
450 0, /* src_mask */
451 0xffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
455 the symbol. */
456 HOWTO (R_PPC64_GOT16_LO, /* type */
457 0, /* rightshift */
458 1, /* size (0 = byte, 1 = short, 2 = long) */
459 16, /* bitsize */
460 FALSE, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_dont, /* complain_on_overflow */
463 ppc64_elf_unhandled_reloc, /* special_function */
464 "R_PPC64_GOT16_LO", /* name */
465 FALSE, /* partial_inplace */
466 0, /* src_mask */
467 0xffff, /* dst_mask */
468 FALSE), /* pcrel_offset */
469
470 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
471 the symbol. */
472 HOWTO (R_PPC64_GOT16_HI, /* type */
473 16, /* rightshift */
474 1, /* size (0 = byte, 1 = short, 2 = long) */
475 16, /* bitsize */
476 FALSE, /* pc_relative */
477 0, /* bitpos */
478 complain_overflow_dont,/* complain_on_overflow */
479 ppc64_elf_unhandled_reloc, /* special_function */
480 "R_PPC64_GOT16_HI", /* name */
481 FALSE, /* partial_inplace */
482 0, /* src_mask */
483 0xffff, /* dst_mask */
484 FALSE), /* pcrel_offset */
485
486 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
487 the symbol. */
488 HOWTO (R_PPC64_GOT16_HA, /* type */
489 16, /* rightshift */
490 1, /* size (0 = byte, 1 = short, 2 = long) */
491 16, /* bitsize */
492 FALSE, /* pc_relative */
493 0, /* bitpos */
494 complain_overflow_dont,/* complain_on_overflow */
495 ppc64_elf_unhandled_reloc, /* special_function */
496 "R_PPC64_GOT16_HA", /* name */
497 FALSE, /* partial_inplace */
498 0, /* src_mask */
499 0xffff, /* dst_mask */
500 FALSE), /* pcrel_offset */
501
502 /* This is used only by the dynamic linker. The symbol should exist
503 both in the object being run and in some shared library. The
504 dynamic linker copies the data addressed by the symbol from the
505 shared library into the object, because the object being
506 run has to have the data at some particular address. */
507 HOWTO (R_PPC64_COPY, /* type */
508 0, /* rightshift */
509 0, /* this one is variable size */
510 0, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_dont, /* complain_on_overflow */
514 ppc64_elf_unhandled_reloc, /* special_function */
515 "R_PPC64_COPY", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Like R_PPC64_ADDR64, but used when setting global offset table
522 entries. */
523 HOWTO (R_PPC64_GLOB_DAT, /* type */
524 0, /* rightshift */
525 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
526 64, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 ppc64_elf_unhandled_reloc, /* special_function */
531 "R_PPC64_GLOB_DAT", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 ONES (64), /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Created by the link editor. Marks a procedure linkage table
538 entry for a symbol. */
539 HOWTO (R_PPC64_JMP_SLOT, /* type */
540 0, /* rightshift */
541 0, /* size (0 = byte, 1 = short, 2 = long) */
542 0, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 ppc64_elf_unhandled_reloc, /* special_function */
547 "R_PPC64_JMP_SLOT", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Used only by the dynamic linker. When the object is run, this
554 doubleword64 is set to the load address of the object, plus the
555 addend. */
556 HOWTO (R_PPC64_RELATIVE, /* type */
557 0, /* rightshift */
558 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
559 64, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_dont, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC64_RELATIVE", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 ONES (64), /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC64_ADDR32, but may be unaligned. */
571 HOWTO (R_PPC64_UADDR32, /* type */
572 0, /* rightshift */
573 2, /* size (0 = byte, 1 = short, 2 = long) */
574 32, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC64_UADDR32", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffffffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* Like R_PPC64_ADDR16, but may be unaligned. */
586 HOWTO (R_PPC64_UADDR16, /* type */
587 0, /* rightshift */
588 1, /* size (0 = byte, 1 = short, 2 = long) */
589 16, /* bitsize */
590 FALSE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC64_UADDR16", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffff, /* dst_mask */
598 FALSE), /* pcrel_offset */
599
600 /* 32-bit PC relative. */
601 HOWTO (R_PPC64_REL32, /* type */
602 0, /* rightshift */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
604 32, /* bitsize */
605 TRUE, /* pc_relative */
606 0, /* bitpos */
607 /* FIXME: Verify. Was complain_overflow_bitfield. */
608 complain_overflow_signed, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC64_REL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* 32-bit relocation to the symbol's procedure linkage table. */
617 HOWTO (R_PPC64_PLT32, /* type */
618 0, /* rightshift */
619 2, /* size (0 = byte, 1 = short, 2 = long) */
620 32, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_bitfield, /* complain_on_overflow */
624 ppc64_elf_unhandled_reloc, /* special_function */
625 "R_PPC64_PLT32", /* name */
626 FALSE, /* partial_inplace */
627 0, /* src_mask */
628 0xffffffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
632 FIXME: R_PPC64_PLTREL32 not supported. */
633 HOWTO (R_PPC64_PLTREL32, /* type */
634 0, /* rightshift */
635 2, /* size (0 = byte, 1 = short, 2 = long) */
636 32, /* bitsize */
637 TRUE, /* pc_relative */
638 0, /* bitpos */
639 complain_overflow_signed, /* complain_on_overflow */
640 bfd_elf_generic_reloc, /* special_function */
641 "R_PPC64_PLTREL32", /* name */
642 FALSE, /* partial_inplace */
643 0, /* src_mask */
644 0xffffffff, /* dst_mask */
645 TRUE), /* pcrel_offset */
646
647 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
648 the symbol. */
649 HOWTO (R_PPC64_PLT16_LO, /* type */
650 0, /* rightshift */
651 1, /* size (0 = byte, 1 = short, 2 = long) */
652 16, /* bitsize */
653 FALSE, /* pc_relative */
654 0, /* bitpos */
655 complain_overflow_dont, /* complain_on_overflow */
656 ppc64_elf_unhandled_reloc, /* special_function */
657 "R_PPC64_PLT16_LO", /* name */
658 FALSE, /* partial_inplace */
659 0, /* src_mask */
660 0xffff, /* dst_mask */
661 FALSE), /* pcrel_offset */
662
663 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
664 the symbol. */
665 HOWTO (R_PPC64_PLT16_HI, /* type */
666 16, /* rightshift */
667 1, /* size (0 = byte, 1 = short, 2 = long) */
668 16, /* bitsize */
669 FALSE, /* pc_relative */
670 0, /* bitpos */
671 complain_overflow_dont, /* complain_on_overflow */
672 ppc64_elf_unhandled_reloc, /* special_function */
673 "R_PPC64_PLT16_HI", /* name */
674 FALSE, /* partial_inplace */
675 0, /* src_mask */
676 0xffff, /* dst_mask */
677 FALSE), /* pcrel_offset */
678
679 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
680 the symbol. */
681 HOWTO (R_PPC64_PLT16_HA, /* type */
682 16, /* rightshift */
683 1, /* size (0 = byte, 1 = short, 2 = long) */
684 16, /* bitsize */
685 FALSE, /* pc_relative */
686 0, /* bitpos */
687 complain_overflow_dont, /* complain_on_overflow */
688 ppc64_elf_unhandled_reloc, /* special_function */
689 "R_PPC64_PLT16_HA", /* name */
690 FALSE, /* partial_inplace */
691 0, /* src_mask */
692 0xffff, /* dst_mask */
693 FALSE), /* pcrel_offset */
694
695 /* 16-bit section relative relocation. */
696 HOWTO (R_PPC64_SECTOFF, /* type */
697 0, /* rightshift */
698 1, /* size (0 = byte, 1 = short, 2 = long) */
699 16, /* bitsize */
700 FALSE, /* pc_relative */
701 0, /* bitpos */
702 complain_overflow_bitfield, /* complain_on_overflow */
703 ppc64_elf_sectoff_reloc, /* special_function */
704 "R_PPC64_SECTOFF", /* name */
705 FALSE, /* partial_inplace */
706 0, /* src_mask */
707 0xffff, /* dst_mask */
708 FALSE), /* pcrel_offset */
709
710 /* Like R_PPC64_SECTOFF, but no overflow warning. */
711 HOWTO (R_PPC64_SECTOFF_LO, /* type */
712 0, /* rightshift */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
714 16, /* bitsize */
715 FALSE, /* pc_relative */
716 0, /* bitpos */
717 complain_overflow_dont, /* complain_on_overflow */
718 ppc64_elf_sectoff_reloc, /* special_function */
719 "R_PPC64_SECTOFF_LO", /* name */
720 FALSE, /* partial_inplace */
721 0, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
724
725 /* 16-bit upper half section relative relocation. */
726 HOWTO (R_PPC64_SECTOFF_HI, /* type */
727 16, /* rightshift */
728 1, /* size (0 = byte, 1 = short, 2 = long) */
729 16, /* bitsize */
730 FALSE, /* pc_relative */
731 0, /* bitpos */
732 complain_overflow_dont, /* complain_on_overflow */
733 ppc64_elf_sectoff_reloc, /* special_function */
734 "R_PPC64_SECTOFF_HI", /* name */
735 FALSE, /* partial_inplace */
736 0, /* src_mask */
737 0xffff, /* dst_mask */
738 FALSE), /* pcrel_offset */
739
740 /* 16-bit upper half adjusted section relative relocation. */
741 HOWTO (R_PPC64_SECTOFF_HA, /* type */
742 16, /* rightshift */
743 1, /* size (0 = byte, 1 = short, 2 = long) */
744 16, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont, /* complain_on_overflow */
748 ppc64_elf_sectoff_ha_reloc, /* special_function */
749 "R_PPC64_SECTOFF_HA", /* name */
750 FALSE, /* partial_inplace */
751 0, /* src_mask */
752 0xffff, /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 /* Like R_PPC64_REL24 without touching the two least significant bits. */
756 HOWTO (R_PPC64_REL30, /* type */
757 2, /* rightshift */
758 2, /* size (0 = byte, 1 = short, 2 = long) */
759 30, /* bitsize */
760 TRUE, /* pc_relative */
761 0, /* bitpos */
762 complain_overflow_dont, /* complain_on_overflow */
763 bfd_elf_generic_reloc, /* special_function */
764 "R_PPC64_REL30", /* name */
765 FALSE, /* partial_inplace */
766 0, /* src_mask */
767 0xfffffffc, /* dst_mask */
768 TRUE), /* pcrel_offset */
769
770 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
771
772 /* A standard 64-bit relocation. */
773 HOWTO (R_PPC64_ADDR64, /* type */
774 0, /* rightshift */
775 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
776 64, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_PPC64_ADDR64", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 ONES (64), /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 /* The bits 32-47 of an address. */
788 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
789 32, /* rightshift */
790 1, /* size (0 = byte, 1 = short, 2 = long) */
791 16, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC64_ADDR16_HIGHER", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0xffff, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 /* The bits 32-47 of an address, plus 1 if the contents of the low
803 16 bits, treated as a signed number, is negative. */
804 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
805 32, /* rightshift */
806 1, /* size (0 = byte, 1 = short, 2 = long) */
807 16, /* bitsize */
808 FALSE, /* pc_relative */
809 0, /* bitpos */
810 complain_overflow_dont, /* complain_on_overflow */
811 ppc64_elf_ha_reloc, /* special_function */
812 "R_PPC64_ADDR16_HIGHERA", /* name */
813 FALSE, /* partial_inplace */
814 0, /* src_mask */
815 0xffff, /* dst_mask */
816 FALSE), /* pcrel_offset */
817
818 /* The bits 48-63 of an address. */
819 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
820 48, /* rightshift */
821 1, /* size (0 = byte, 1 = short, 2 = long) */
822 16, /* bitsize */
823 FALSE, /* pc_relative */
824 0, /* bitpos */
825 complain_overflow_dont, /* complain_on_overflow */
826 bfd_elf_generic_reloc, /* special_function */
827 "R_PPC64_ADDR16_HIGHEST", /* name */
828 FALSE, /* partial_inplace */
829 0, /* src_mask */
830 0xffff, /* dst_mask */
831 FALSE), /* pcrel_offset */
832
833 /* The bits 48-63 of an address, plus 1 if the contents of the low
834 16 bits, treated as a signed number, is negative. */
835 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
836 48, /* rightshift */
837 1, /* size (0 = byte, 1 = short, 2 = long) */
838 16, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc64_elf_ha_reloc, /* special_function */
843 "R_PPC64_ADDR16_HIGHESTA", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* Like ADDR64, but may be unaligned. */
850 HOWTO (R_PPC64_UADDR64, /* type */
851 0, /* rightshift */
852 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
853 64, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_dont, /* complain_on_overflow */
857 bfd_elf_generic_reloc, /* special_function */
858 "R_PPC64_UADDR64", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 ONES (64), /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* 64-bit relative relocation. */
865 HOWTO (R_PPC64_REL64, /* type */
866 0, /* rightshift */
867 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
868 64, /* bitsize */
869 TRUE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 bfd_elf_generic_reloc, /* special_function */
873 "R_PPC64_REL64", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 ONES (64), /* dst_mask */
877 TRUE), /* pcrel_offset */
878
879 /* 64-bit relocation to the symbol's procedure linkage table. */
880 HOWTO (R_PPC64_PLT64, /* type */
881 0, /* rightshift */
882 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
883 64, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc64_elf_unhandled_reloc, /* special_function */
888 "R_PPC64_PLT64", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 ONES (64), /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* 64-bit PC relative relocation to the symbol's procedure linkage
895 table. */
896 /* FIXME: R_PPC64_PLTREL64 not supported. */
897 HOWTO (R_PPC64_PLTREL64, /* type */
898 0, /* rightshift */
899 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
900 64, /* bitsize */
901 TRUE, /* pc_relative */
902 0, /* bitpos */
903 complain_overflow_dont, /* complain_on_overflow */
904 ppc64_elf_unhandled_reloc, /* special_function */
905 "R_PPC64_PLTREL64", /* name */
906 FALSE, /* partial_inplace */
907 0, /* src_mask */
908 ONES (64), /* dst_mask */
909 TRUE), /* pcrel_offset */
910
911 /* 16 bit TOC-relative relocation. */
912
913 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
914 HOWTO (R_PPC64_TOC16, /* type */
915 0, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_signed, /* complain_on_overflow */
921 ppc64_elf_toc_reloc, /* special_function */
922 "R_PPC64_TOC16", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* 16 bit TOC-relative relocation without overflow. */
929
930 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
931 HOWTO (R_PPC64_TOC16_LO, /* type */
932 0, /* rightshift */
933 1, /* size (0 = byte, 1 = short, 2 = long) */
934 16, /* bitsize */
935 FALSE, /* pc_relative */
936 0, /* bitpos */
937 complain_overflow_dont, /* complain_on_overflow */
938 ppc64_elf_toc_reloc, /* special_function */
939 "R_PPC64_TOC16_LO", /* name */
940 FALSE, /* partial_inplace */
941 0, /* src_mask */
942 0xffff, /* dst_mask */
943 FALSE), /* pcrel_offset */
944
945 /* 16 bit TOC-relative relocation, high 16 bits. */
946
947 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
948 HOWTO (R_PPC64_TOC16_HI, /* type */
949 16, /* rightshift */
950 1, /* size (0 = byte, 1 = short, 2 = long) */
951 16, /* bitsize */
952 FALSE, /* pc_relative */
953 0, /* bitpos */
954 complain_overflow_dont, /* complain_on_overflow */
955 ppc64_elf_toc_reloc, /* special_function */
956 "R_PPC64_TOC16_HI", /* name */
957 FALSE, /* partial_inplace */
958 0, /* src_mask */
959 0xffff, /* dst_mask */
960 FALSE), /* pcrel_offset */
961
962 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
963 contents of the low 16 bits, treated as a signed number, is
964 negative. */
965
966 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
967 HOWTO (R_PPC64_TOC16_HA, /* type */
968 16, /* rightshift */
969 1, /* size (0 = byte, 1 = short, 2 = long) */
970 16, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc64_elf_toc_ha_reloc, /* special_function */
975 "R_PPC64_TOC16_HA", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* 64-bit relocation; insert value of TOC base (.TOC.). */
982
983 /* R_PPC64_TOC 51 doubleword64 .TOC. */
984 HOWTO (R_PPC64_TOC, /* type */
985 0, /* rightshift */
986 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
987 64, /* bitsize */
988 FALSE, /* pc_relative */
989 0, /* bitpos */
990 complain_overflow_bitfield, /* complain_on_overflow */
991 ppc64_elf_toc64_reloc, /* special_function */
992 "R_PPC64_TOC", /* name */
993 FALSE, /* partial_inplace */
994 0, /* src_mask */
995 ONES (64), /* dst_mask */
996 FALSE), /* pcrel_offset */
997
998 /* Like R_PPC64_GOT16, but also informs the link editor that the
999 value to relocate may (!) refer to a PLT entry which the link
1000 editor (a) may replace with the symbol value. If the link editor
1001 is unable to fully resolve the symbol, it may (b) create a PLT
1002 entry and store the address to the new PLT entry in the GOT.
1003 This permits lazy resolution of function symbols at run time.
1004 The link editor may also skip all of this and just (c) emit a
1005 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1006 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1007 HOWTO (R_PPC64_PLTGOT16, /* type */
1008 0, /* rightshift */
1009 1, /* size (0 = byte, 1 = short, 2 = long) */
1010 16, /* bitsize */
1011 FALSE, /* pc_relative */
1012 0, /* bitpos */
1013 complain_overflow_signed, /* complain_on_overflow */
1014 ppc64_elf_unhandled_reloc, /* special_function */
1015 "R_PPC64_PLTGOT16", /* name */
1016 FALSE, /* partial_inplace */
1017 0, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1020
1021 /* Like R_PPC64_PLTGOT16, but without overflow. */
1022 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1023 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1024 0, /* rightshift */
1025 1, /* size (0 = byte, 1 = short, 2 = long) */
1026 16, /* bitsize */
1027 FALSE, /* pc_relative */
1028 0, /* bitpos */
1029 complain_overflow_dont, /* complain_on_overflow */
1030 ppc64_elf_unhandled_reloc, /* special_function */
1031 "R_PPC64_PLTGOT16_LO", /* name */
1032 FALSE, /* partial_inplace */
1033 0, /* src_mask */
1034 0xffff, /* dst_mask */
1035 FALSE), /* pcrel_offset */
1036
1037 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1038 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1039 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1040 16, /* rightshift */
1041 1, /* size (0 = byte, 1 = short, 2 = long) */
1042 16, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 ppc64_elf_unhandled_reloc, /* special_function */
1047 "R_PPC64_PLTGOT16_HI", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 0xffff, /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1054 1 if the contents of the low 16 bits, treated as a signed number,
1055 is negative. */
1056 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1057 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1058 16, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_dont,/* complain_on_overflow */
1064 ppc64_elf_unhandled_reloc, /* special_function */
1065 "R_PPC64_PLTGOT16_HA", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1072 HOWTO (R_PPC64_ADDR16_DS, /* type */
1073 0, /* rightshift */
1074 1, /* size (0 = byte, 1 = short, 2 = long) */
1075 16, /* bitsize */
1076 FALSE, /* pc_relative */
1077 0, /* bitpos */
1078 complain_overflow_bitfield, /* complain_on_overflow */
1079 bfd_elf_generic_reloc, /* special_function */
1080 "R_PPC64_ADDR16_DS", /* name */
1081 FALSE, /* partial_inplace */
1082 0, /* src_mask */
1083 0xfffc, /* dst_mask */
1084 FALSE), /* pcrel_offset */
1085
1086 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1087 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1088 0, /* rightshift */
1089 1, /* size (0 = byte, 1 = short, 2 = long) */
1090 16, /* bitsize */
1091 FALSE, /* pc_relative */
1092 0, /* bitpos */
1093 complain_overflow_dont,/* complain_on_overflow */
1094 bfd_elf_generic_reloc, /* special_function */
1095 "R_PPC64_ADDR16_LO_DS",/* name */
1096 FALSE, /* partial_inplace */
1097 0, /* src_mask */
1098 0xfffc, /* dst_mask */
1099 FALSE), /* pcrel_offset */
1100
1101 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1102 HOWTO (R_PPC64_GOT16_DS, /* type */
1103 0, /* rightshift */
1104 1, /* size (0 = byte, 1 = short, 2 = long) */
1105 16, /* bitsize */
1106 FALSE, /* pc_relative */
1107 0, /* bitpos */
1108 complain_overflow_signed, /* complain_on_overflow */
1109 ppc64_elf_unhandled_reloc, /* special_function */
1110 "R_PPC64_GOT16_DS", /* name */
1111 FALSE, /* partial_inplace */
1112 0, /* src_mask */
1113 0xfffc, /* dst_mask */
1114 FALSE), /* pcrel_offset */
1115
1116 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1117 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1118 0, /* rightshift */
1119 1, /* size (0 = byte, 1 = short, 2 = long) */
1120 16, /* bitsize */
1121 FALSE, /* pc_relative */
1122 0, /* bitpos */
1123 complain_overflow_dont, /* complain_on_overflow */
1124 ppc64_elf_unhandled_reloc, /* special_function */
1125 "R_PPC64_GOT16_LO_DS", /* name */
1126 FALSE, /* partial_inplace */
1127 0, /* src_mask */
1128 0xfffc, /* dst_mask */
1129 FALSE), /* pcrel_offset */
1130
1131 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1132 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1133 0, /* rightshift */
1134 1, /* size (0 = byte, 1 = short, 2 = long) */
1135 16, /* bitsize */
1136 FALSE, /* pc_relative */
1137 0, /* bitpos */
1138 complain_overflow_dont, /* complain_on_overflow */
1139 ppc64_elf_unhandled_reloc, /* special_function */
1140 "R_PPC64_PLT16_LO_DS", /* name */
1141 FALSE, /* partial_inplace */
1142 0, /* src_mask */
1143 0xfffc, /* dst_mask */
1144 FALSE), /* pcrel_offset */
1145
1146 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1147 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1148 0, /* rightshift */
1149 1, /* size (0 = byte, 1 = short, 2 = long) */
1150 16, /* bitsize */
1151 FALSE, /* pc_relative */
1152 0, /* bitpos */
1153 complain_overflow_bitfield, /* complain_on_overflow */
1154 ppc64_elf_sectoff_reloc, /* special_function */
1155 "R_PPC64_SECTOFF_DS", /* name */
1156 FALSE, /* partial_inplace */
1157 0, /* src_mask */
1158 0xfffc, /* dst_mask */
1159 FALSE), /* pcrel_offset */
1160
1161 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1162 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1163 0, /* rightshift */
1164 1, /* size (0 = byte, 1 = short, 2 = long) */
1165 16, /* bitsize */
1166 FALSE, /* pc_relative */
1167 0, /* bitpos */
1168 complain_overflow_dont, /* complain_on_overflow */
1169 ppc64_elf_sectoff_reloc, /* special_function */
1170 "R_PPC64_SECTOFF_LO_DS",/* name */
1171 FALSE, /* partial_inplace */
1172 0, /* src_mask */
1173 0xfffc, /* dst_mask */
1174 FALSE), /* pcrel_offset */
1175
1176 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1177 HOWTO (R_PPC64_TOC16_DS, /* type */
1178 0, /* rightshift */
1179 1, /* size (0 = byte, 1 = short, 2 = long) */
1180 16, /* bitsize */
1181 FALSE, /* pc_relative */
1182 0, /* bitpos */
1183 complain_overflow_signed, /* complain_on_overflow */
1184 ppc64_elf_toc_reloc, /* special_function */
1185 "R_PPC64_TOC16_DS", /* name */
1186 FALSE, /* partial_inplace */
1187 0, /* src_mask */
1188 0xfffc, /* dst_mask */
1189 FALSE), /* pcrel_offset */
1190
1191 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1192 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1193 0, /* rightshift */
1194 1, /* size (0 = byte, 1 = short, 2 = long) */
1195 16, /* bitsize */
1196 FALSE, /* pc_relative */
1197 0, /* bitpos */
1198 complain_overflow_dont, /* complain_on_overflow */
1199 ppc64_elf_toc_reloc, /* special_function */
1200 "R_PPC64_TOC16_LO_DS", /* name */
1201 FALSE, /* partial_inplace */
1202 0, /* src_mask */
1203 0xfffc, /* dst_mask */
1204 FALSE), /* pcrel_offset */
1205
1206 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1207 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1208 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1209 0, /* rightshift */
1210 1, /* size (0 = byte, 1 = short, 2 = long) */
1211 16, /* bitsize */
1212 FALSE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_signed, /* complain_on_overflow */
1215 ppc64_elf_unhandled_reloc, /* special_function */
1216 "R_PPC64_PLTGOT16_DS", /* name */
1217 FALSE, /* partial_inplace */
1218 0, /* src_mask */
1219 0xfffc, /* dst_mask */
1220 FALSE), /* pcrel_offset */
1221
1222 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1223 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1224 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1225 0, /* rightshift */
1226 1, /* size (0 = byte, 1 = short, 2 = long) */
1227 16, /* bitsize */
1228 FALSE, /* pc_relative */
1229 0, /* bitpos */
1230 complain_overflow_dont, /* complain_on_overflow */
1231 ppc64_elf_unhandled_reloc, /* special_function */
1232 "R_PPC64_PLTGOT16_LO_DS",/* name */
1233 FALSE, /* partial_inplace */
1234 0, /* src_mask */
1235 0xfffc, /* dst_mask */
1236 FALSE), /* pcrel_offset */
1237
1238 /* Marker relocs for TLS. */
1239 HOWTO (R_PPC64_TLS,
1240 0, /* rightshift */
1241 2, /* size (0 = byte, 1 = short, 2 = long) */
1242 32, /* bitsize */
1243 FALSE, /* pc_relative */
1244 0, /* bitpos */
1245 complain_overflow_dont, /* complain_on_overflow */
1246 bfd_elf_generic_reloc, /* special_function */
1247 "R_PPC64_TLS", /* name */
1248 FALSE, /* partial_inplace */
1249 0, /* src_mask */
1250 0, /* dst_mask */
1251 FALSE), /* pcrel_offset */
1252
1253 HOWTO (R_PPC64_TLSGD,
1254 0, /* rightshift */
1255 2, /* size (0 = byte, 1 = short, 2 = long) */
1256 32, /* bitsize */
1257 FALSE, /* pc_relative */
1258 0, /* bitpos */
1259 complain_overflow_dont, /* complain_on_overflow */
1260 bfd_elf_generic_reloc, /* special_function */
1261 "R_PPC64_TLSGD", /* name */
1262 FALSE, /* partial_inplace */
1263 0, /* src_mask */
1264 0, /* dst_mask */
1265 FALSE), /* pcrel_offset */
1266
1267 HOWTO (R_PPC64_TLSLD,
1268 0, /* rightshift */
1269 2, /* size (0 = byte, 1 = short, 2 = long) */
1270 32, /* bitsize */
1271 FALSE, /* pc_relative */
1272 0, /* bitpos */
1273 complain_overflow_dont, /* complain_on_overflow */
1274 bfd_elf_generic_reloc, /* special_function */
1275 "R_PPC64_TLSLD", /* name */
1276 FALSE, /* partial_inplace */
1277 0, /* src_mask */
1278 0, /* dst_mask */
1279 FALSE), /* pcrel_offset */
1280
1281 /* Computes the load module index of the load module that contains the
1282 definition of its TLS sym. */
1283 HOWTO (R_PPC64_DTPMOD64,
1284 0, /* rightshift */
1285 4, /* size (0 = byte, 1 = short, 2 = long) */
1286 64, /* bitsize */
1287 FALSE, /* pc_relative */
1288 0, /* bitpos */
1289 complain_overflow_dont, /* complain_on_overflow */
1290 ppc64_elf_unhandled_reloc, /* special_function */
1291 "R_PPC64_DTPMOD64", /* name */
1292 FALSE, /* partial_inplace */
1293 0, /* src_mask */
1294 ONES (64), /* dst_mask */
1295 FALSE), /* pcrel_offset */
1296
1297 /* Computes a dtv-relative displacement, the difference between the value
1298 of sym+add and the base address of the thread-local storage block that
1299 contains the definition of sym, minus 0x8000. */
1300 HOWTO (R_PPC64_DTPREL64,
1301 0, /* rightshift */
1302 4, /* size (0 = byte, 1 = short, 2 = long) */
1303 64, /* bitsize */
1304 FALSE, /* pc_relative */
1305 0, /* bitpos */
1306 complain_overflow_dont, /* complain_on_overflow */
1307 ppc64_elf_unhandled_reloc, /* special_function */
1308 "R_PPC64_DTPREL64", /* name */
1309 FALSE, /* partial_inplace */
1310 0, /* src_mask */
1311 ONES (64), /* dst_mask */
1312 FALSE), /* pcrel_offset */
1313
1314 /* A 16 bit dtprel reloc. */
1315 HOWTO (R_PPC64_DTPREL16,
1316 0, /* rightshift */
1317 1, /* size (0 = byte, 1 = short, 2 = long) */
1318 16, /* bitsize */
1319 FALSE, /* pc_relative */
1320 0, /* bitpos */
1321 complain_overflow_signed, /* complain_on_overflow */
1322 ppc64_elf_unhandled_reloc, /* special_function */
1323 "R_PPC64_DTPREL16", /* name */
1324 FALSE, /* partial_inplace */
1325 0, /* src_mask */
1326 0xffff, /* dst_mask */
1327 FALSE), /* pcrel_offset */
1328
1329 /* Like DTPREL16, but no overflow. */
1330 HOWTO (R_PPC64_DTPREL16_LO,
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_dont, /* complain_on_overflow */
1337 ppc64_elf_unhandled_reloc, /* special_function */
1338 "R_PPC64_DTPREL16_LO", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1345 HOWTO (R_PPC64_DTPREL16_HI,
1346 16, /* rightshift */
1347 1, /* size (0 = byte, 1 = short, 2 = long) */
1348 16, /* bitsize */
1349 FALSE, /* pc_relative */
1350 0, /* bitpos */
1351 complain_overflow_dont, /* complain_on_overflow */
1352 ppc64_elf_unhandled_reloc, /* special_function */
1353 "R_PPC64_DTPREL16_HI", /* name */
1354 FALSE, /* partial_inplace */
1355 0, /* src_mask */
1356 0xffff, /* dst_mask */
1357 FALSE), /* pcrel_offset */
1358
1359 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1360 HOWTO (R_PPC64_DTPREL16_HA,
1361 16, /* rightshift */
1362 1, /* size (0 = byte, 1 = short, 2 = long) */
1363 16, /* bitsize */
1364 FALSE, /* pc_relative */
1365 0, /* bitpos */
1366 complain_overflow_dont, /* complain_on_overflow */
1367 ppc64_elf_unhandled_reloc, /* special_function */
1368 "R_PPC64_DTPREL16_HA", /* name */
1369 FALSE, /* partial_inplace */
1370 0, /* src_mask */
1371 0xffff, /* dst_mask */
1372 FALSE), /* pcrel_offset */
1373
1374 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1375 HOWTO (R_PPC64_DTPREL16_HIGHER,
1376 32, /* rightshift */
1377 1, /* size (0 = byte, 1 = short, 2 = long) */
1378 16, /* bitsize */
1379 FALSE, /* pc_relative */
1380 0, /* bitpos */
1381 complain_overflow_dont, /* complain_on_overflow */
1382 ppc64_elf_unhandled_reloc, /* special_function */
1383 "R_PPC64_DTPREL16_HIGHER", /* name */
1384 FALSE, /* partial_inplace */
1385 0, /* src_mask */
1386 0xffff, /* dst_mask */
1387 FALSE), /* pcrel_offset */
1388
1389 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1390 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1391 32, /* rightshift */
1392 1, /* size (0 = byte, 1 = short, 2 = long) */
1393 16, /* bitsize */
1394 FALSE, /* pc_relative */
1395 0, /* bitpos */
1396 complain_overflow_dont, /* complain_on_overflow */
1397 ppc64_elf_unhandled_reloc, /* special_function */
1398 "R_PPC64_DTPREL16_HIGHERA", /* name */
1399 FALSE, /* partial_inplace */
1400 0, /* src_mask */
1401 0xffff, /* dst_mask */
1402 FALSE), /* pcrel_offset */
1403
1404 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1405 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1406 48, /* rightshift */
1407 1, /* size (0 = byte, 1 = short, 2 = long) */
1408 16, /* bitsize */
1409 FALSE, /* pc_relative */
1410 0, /* bitpos */
1411 complain_overflow_dont, /* complain_on_overflow */
1412 ppc64_elf_unhandled_reloc, /* special_function */
1413 "R_PPC64_DTPREL16_HIGHEST", /* name */
1414 FALSE, /* partial_inplace */
1415 0, /* src_mask */
1416 0xffff, /* dst_mask */
1417 FALSE), /* pcrel_offset */
1418
1419 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1420 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1421 48, /* rightshift */
1422 1, /* size (0 = byte, 1 = short, 2 = long) */
1423 16, /* bitsize */
1424 FALSE, /* pc_relative */
1425 0, /* bitpos */
1426 complain_overflow_dont, /* complain_on_overflow */
1427 ppc64_elf_unhandled_reloc, /* special_function */
1428 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1429 FALSE, /* partial_inplace */
1430 0, /* src_mask */
1431 0xffff, /* dst_mask */
1432 FALSE), /* pcrel_offset */
1433
1434 /* Like DTPREL16, but for insns with a DS field. */
1435 HOWTO (R_PPC64_DTPREL16_DS,
1436 0, /* rightshift */
1437 1, /* size (0 = byte, 1 = short, 2 = long) */
1438 16, /* bitsize */
1439 FALSE, /* pc_relative */
1440 0, /* bitpos */
1441 complain_overflow_signed, /* complain_on_overflow */
1442 ppc64_elf_unhandled_reloc, /* special_function */
1443 "R_PPC64_DTPREL16_DS", /* name */
1444 FALSE, /* partial_inplace */
1445 0, /* src_mask */
1446 0xfffc, /* dst_mask */
1447 FALSE), /* pcrel_offset */
1448
1449 /* Like DTPREL16_DS, but no overflow. */
1450 HOWTO (R_PPC64_DTPREL16_LO_DS,
1451 0, /* rightshift */
1452 1, /* size (0 = byte, 1 = short, 2 = long) */
1453 16, /* bitsize */
1454 FALSE, /* pc_relative */
1455 0, /* bitpos */
1456 complain_overflow_dont, /* complain_on_overflow */
1457 ppc64_elf_unhandled_reloc, /* special_function */
1458 "R_PPC64_DTPREL16_LO_DS", /* name */
1459 FALSE, /* partial_inplace */
1460 0, /* src_mask */
1461 0xfffc, /* dst_mask */
1462 FALSE), /* pcrel_offset */
1463
1464 /* Computes a tp-relative displacement, the difference between the value of
1465 sym+add and the value of the thread pointer (r13). */
1466 HOWTO (R_PPC64_TPREL64,
1467 0, /* rightshift */
1468 4, /* size (0 = byte, 1 = short, 2 = long) */
1469 64, /* bitsize */
1470 FALSE, /* pc_relative */
1471 0, /* bitpos */
1472 complain_overflow_dont, /* complain_on_overflow */
1473 ppc64_elf_unhandled_reloc, /* special_function */
1474 "R_PPC64_TPREL64", /* name */
1475 FALSE, /* partial_inplace */
1476 0, /* src_mask */
1477 ONES (64), /* dst_mask */
1478 FALSE), /* pcrel_offset */
1479
1480 /* A 16 bit tprel reloc. */
1481 HOWTO (R_PPC64_TPREL16,
1482 0, /* rightshift */
1483 1, /* size (0 = byte, 1 = short, 2 = long) */
1484 16, /* bitsize */
1485 FALSE, /* pc_relative */
1486 0, /* bitpos */
1487 complain_overflow_signed, /* complain_on_overflow */
1488 ppc64_elf_unhandled_reloc, /* special_function */
1489 "R_PPC64_TPREL16", /* name */
1490 FALSE, /* partial_inplace */
1491 0, /* src_mask */
1492 0xffff, /* dst_mask */
1493 FALSE), /* pcrel_offset */
1494
1495 /* Like TPREL16, but no overflow. */
1496 HOWTO (R_PPC64_TPREL16_LO,
1497 0, /* rightshift */
1498 1, /* size (0 = byte, 1 = short, 2 = long) */
1499 16, /* bitsize */
1500 FALSE, /* pc_relative */
1501 0, /* bitpos */
1502 complain_overflow_dont, /* complain_on_overflow */
1503 ppc64_elf_unhandled_reloc, /* special_function */
1504 "R_PPC64_TPREL16_LO", /* name */
1505 FALSE, /* partial_inplace */
1506 0, /* src_mask */
1507 0xffff, /* dst_mask */
1508 FALSE), /* pcrel_offset */
1509
1510 /* Like TPREL16_LO, but next higher group of 16 bits. */
1511 HOWTO (R_PPC64_TPREL16_HI,
1512 16, /* rightshift */
1513 1, /* size (0 = byte, 1 = short, 2 = long) */
1514 16, /* bitsize */
1515 FALSE, /* pc_relative */
1516 0, /* bitpos */
1517 complain_overflow_dont, /* complain_on_overflow */
1518 ppc64_elf_unhandled_reloc, /* special_function */
1519 "R_PPC64_TPREL16_HI", /* name */
1520 FALSE, /* partial_inplace */
1521 0, /* src_mask */
1522 0xffff, /* dst_mask */
1523 FALSE), /* pcrel_offset */
1524
1525 /* Like TPREL16_HI, but adjust for low 16 bits. */
1526 HOWTO (R_PPC64_TPREL16_HA,
1527 16, /* rightshift */
1528 1, /* size (0 = byte, 1 = short, 2 = long) */
1529 16, /* bitsize */
1530 FALSE, /* pc_relative */
1531 0, /* bitpos */
1532 complain_overflow_dont, /* complain_on_overflow */
1533 ppc64_elf_unhandled_reloc, /* special_function */
1534 "R_PPC64_TPREL16_HA", /* name */
1535 FALSE, /* partial_inplace */
1536 0, /* src_mask */
1537 0xffff, /* dst_mask */
1538 FALSE), /* pcrel_offset */
1539
1540 /* Like TPREL16_HI, but next higher group of 16 bits. */
1541 HOWTO (R_PPC64_TPREL16_HIGHER,
1542 32, /* rightshift */
1543 1, /* size (0 = byte, 1 = short, 2 = long) */
1544 16, /* bitsize */
1545 FALSE, /* pc_relative */
1546 0, /* bitpos */
1547 complain_overflow_dont, /* complain_on_overflow */
1548 ppc64_elf_unhandled_reloc, /* special_function */
1549 "R_PPC64_TPREL16_HIGHER", /* name */
1550 FALSE, /* partial_inplace */
1551 0, /* src_mask */
1552 0xffff, /* dst_mask */
1553 FALSE), /* pcrel_offset */
1554
1555 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1556 HOWTO (R_PPC64_TPREL16_HIGHERA,
1557 32, /* rightshift */
1558 1, /* size (0 = byte, 1 = short, 2 = long) */
1559 16, /* bitsize */
1560 FALSE, /* pc_relative */
1561 0, /* bitpos */
1562 complain_overflow_dont, /* complain_on_overflow */
1563 ppc64_elf_unhandled_reloc, /* special_function */
1564 "R_PPC64_TPREL16_HIGHERA", /* name */
1565 FALSE, /* partial_inplace */
1566 0, /* src_mask */
1567 0xffff, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1569
1570 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1571 HOWTO (R_PPC64_TPREL16_HIGHEST,
1572 48, /* rightshift */
1573 1, /* size (0 = byte, 1 = short, 2 = long) */
1574 16, /* bitsize */
1575 FALSE, /* pc_relative */
1576 0, /* bitpos */
1577 complain_overflow_dont, /* complain_on_overflow */
1578 ppc64_elf_unhandled_reloc, /* special_function */
1579 "R_PPC64_TPREL16_HIGHEST", /* name */
1580 FALSE, /* partial_inplace */
1581 0, /* src_mask */
1582 0xffff, /* dst_mask */
1583 FALSE), /* pcrel_offset */
1584
1585 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1586 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1587 48, /* rightshift */
1588 1, /* size (0 = byte, 1 = short, 2 = long) */
1589 16, /* bitsize */
1590 FALSE, /* pc_relative */
1591 0, /* bitpos */
1592 complain_overflow_dont, /* complain_on_overflow */
1593 ppc64_elf_unhandled_reloc, /* special_function */
1594 "R_PPC64_TPREL16_HIGHESTA", /* name */
1595 FALSE, /* partial_inplace */
1596 0, /* src_mask */
1597 0xffff, /* dst_mask */
1598 FALSE), /* pcrel_offset */
1599
1600 /* Like TPREL16, but for insns with a DS field. */
1601 HOWTO (R_PPC64_TPREL16_DS,
1602 0, /* rightshift */
1603 1, /* size (0 = byte, 1 = short, 2 = long) */
1604 16, /* bitsize */
1605 FALSE, /* pc_relative */
1606 0, /* bitpos */
1607 complain_overflow_signed, /* complain_on_overflow */
1608 ppc64_elf_unhandled_reloc, /* special_function */
1609 "R_PPC64_TPREL16_DS", /* name */
1610 FALSE, /* partial_inplace */
1611 0, /* src_mask */
1612 0xfffc, /* dst_mask */
1613 FALSE), /* pcrel_offset */
1614
1615 /* Like TPREL16_DS, but no overflow. */
1616 HOWTO (R_PPC64_TPREL16_LO_DS,
1617 0, /* rightshift */
1618 1, /* size (0 = byte, 1 = short, 2 = long) */
1619 16, /* bitsize */
1620 FALSE, /* pc_relative */
1621 0, /* bitpos */
1622 complain_overflow_dont, /* complain_on_overflow */
1623 ppc64_elf_unhandled_reloc, /* special_function */
1624 "R_PPC64_TPREL16_LO_DS", /* name */
1625 FALSE, /* partial_inplace */
1626 0, /* src_mask */
1627 0xfffc, /* dst_mask */
1628 FALSE), /* pcrel_offset */
1629
1630 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1631 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1632 to the first entry relative to the TOC base (r2). */
1633 HOWTO (R_PPC64_GOT_TLSGD16,
1634 0, /* rightshift */
1635 1, /* size (0 = byte, 1 = short, 2 = long) */
1636 16, /* bitsize */
1637 FALSE, /* pc_relative */
1638 0, /* bitpos */
1639 complain_overflow_signed, /* complain_on_overflow */
1640 ppc64_elf_unhandled_reloc, /* special_function */
1641 "R_PPC64_GOT_TLSGD16", /* name */
1642 FALSE, /* partial_inplace */
1643 0, /* src_mask */
1644 0xffff, /* dst_mask */
1645 FALSE), /* pcrel_offset */
1646
1647 /* Like GOT_TLSGD16, but no overflow. */
1648 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1649 0, /* rightshift */
1650 1, /* size (0 = byte, 1 = short, 2 = long) */
1651 16, /* bitsize */
1652 FALSE, /* pc_relative */
1653 0, /* bitpos */
1654 complain_overflow_dont, /* complain_on_overflow */
1655 ppc64_elf_unhandled_reloc, /* special_function */
1656 "R_PPC64_GOT_TLSGD16_LO", /* name */
1657 FALSE, /* partial_inplace */
1658 0, /* src_mask */
1659 0xffff, /* dst_mask */
1660 FALSE), /* pcrel_offset */
1661
1662 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1663 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1664 16, /* rightshift */
1665 1, /* size (0 = byte, 1 = short, 2 = long) */
1666 16, /* bitsize */
1667 FALSE, /* pc_relative */
1668 0, /* bitpos */
1669 complain_overflow_dont, /* complain_on_overflow */
1670 ppc64_elf_unhandled_reloc, /* special_function */
1671 "R_PPC64_GOT_TLSGD16_HI", /* name */
1672 FALSE, /* partial_inplace */
1673 0, /* src_mask */
1674 0xffff, /* dst_mask */
1675 FALSE), /* pcrel_offset */
1676
1677 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1678 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1679 16, /* rightshift */
1680 1, /* size (0 = byte, 1 = short, 2 = long) */
1681 16, /* bitsize */
1682 FALSE, /* pc_relative */
1683 0, /* bitpos */
1684 complain_overflow_dont, /* complain_on_overflow */
1685 ppc64_elf_unhandled_reloc, /* special_function */
1686 "R_PPC64_GOT_TLSGD16_HA", /* name */
1687 FALSE, /* partial_inplace */
1688 0, /* src_mask */
1689 0xffff, /* dst_mask */
1690 FALSE), /* pcrel_offset */
1691
1692 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1693 with values (sym+add)@dtpmod and zero, and computes the offset to the
1694 first entry relative to the TOC base (r2). */
1695 HOWTO (R_PPC64_GOT_TLSLD16,
1696 0, /* rightshift */
1697 1, /* size (0 = byte, 1 = short, 2 = long) */
1698 16, /* bitsize */
1699 FALSE, /* pc_relative */
1700 0, /* bitpos */
1701 complain_overflow_signed, /* complain_on_overflow */
1702 ppc64_elf_unhandled_reloc, /* special_function */
1703 "R_PPC64_GOT_TLSLD16", /* name */
1704 FALSE, /* partial_inplace */
1705 0, /* src_mask */
1706 0xffff, /* dst_mask */
1707 FALSE), /* pcrel_offset */
1708
1709 /* Like GOT_TLSLD16, but no overflow. */
1710 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1711 0, /* rightshift */
1712 1, /* size (0 = byte, 1 = short, 2 = long) */
1713 16, /* bitsize */
1714 FALSE, /* pc_relative */
1715 0, /* bitpos */
1716 complain_overflow_dont, /* complain_on_overflow */
1717 ppc64_elf_unhandled_reloc, /* special_function */
1718 "R_PPC64_GOT_TLSLD16_LO", /* name */
1719 FALSE, /* partial_inplace */
1720 0, /* src_mask */
1721 0xffff, /* dst_mask */
1722 FALSE), /* pcrel_offset */
1723
1724 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1725 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1726 16, /* rightshift */
1727 1, /* size (0 = byte, 1 = short, 2 = long) */
1728 16, /* bitsize */
1729 FALSE, /* pc_relative */
1730 0, /* bitpos */
1731 complain_overflow_dont, /* complain_on_overflow */
1732 ppc64_elf_unhandled_reloc, /* special_function */
1733 "R_PPC64_GOT_TLSLD16_HI", /* name */
1734 FALSE, /* partial_inplace */
1735 0, /* src_mask */
1736 0xffff, /* dst_mask */
1737 FALSE), /* pcrel_offset */
1738
1739 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1740 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1741 16, /* rightshift */
1742 1, /* size (0 = byte, 1 = short, 2 = long) */
1743 16, /* bitsize */
1744 FALSE, /* pc_relative */
1745 0, /* bitpos */
1746 complain_overflow_dont, /* complain_on_overflow */
1747 ppc64_elf_unhandled_reloc, /* special_function */
1748 "R_PPC64_GOT_TLSLD16_HA", /* name */
1749 FALSE, /* partial_inplace */
1750 0, /* src_mask */
1751 0xffff, /* dst_mask */
1752 FALSE), /* pcrel_offset */
1753
1754 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1755 the offset to the entry relative to the TOC base (r2). */
1756 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1757 0, /* rightshift */
1758 1, /* size (0 = byte, 1 = short, 2 = long) */
1759 16, /* bitsize */
1760 FALSE, /* pc_relative */
1761 0, /* bitpos */
1762 complain_overflow_signed, /* complain_on_overflow */
1763 ppc64_elf_unhandled_reloc, /* special_function */
1764 "R_PPC64_GOT_DTPREL16_DS", /* name */
1765 FALSE, /* partial_inplace */
1766 0, /* src_mask */
1767 0xfffc, /* dst_mask */
1768 FALSE), /* pcrel_offset */
1769
1770 /* Like GOT_DTPREL16_DS, but no overflow. */
1771 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1772 0, /* rightshift */
1773 1, /* size (0 = byte, 1 = short, 2 = long) */
1774 16, /* bitsize */
1775 FALSE, /* pc_relative */
1776 0, /* bitpos */
1777 complain_overflow_dont, /* complain_on_overflow */
1778 ppc64_elf_unhandled_reloc, /* special_function */
1779 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1780 FALSE, /* partial_inplace */
1781 0, /* src_mask */
1782 0xfffc, /* dst_mask */
1783 FALSE), /* pcrel_offset */
1784
1785 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1786 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1787 16, /* rightshift */
1788 1, /* size (0 = byte, 1 = short, 2 = long) */
1789 16, /* bitsize */
1790 FALSE, /* pc_relative */
1791 0, /* bitpos */
1792 complain_overflow_dont, /* complain_on_overflow */
1793 ppc64_elf_unhandled_reloc, /* special_function */
1794 "R_PPC64_GOT_DTPREL16_HI", /* name */
1795 FALSE, /* partial_inplace */
1796 0, /* src_mask */
1797 0xffff, /* dst_mask */
1798 FALSE), /* pcrel_offset */
1799
1800 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1801 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1802 16, /* rightshift */
1803 1, /* size (0 = byte, 1 = short, 2 = long) */
1804 16, /* bitsize */
1805 FALSE, /* pc_relative */
1806 0, /* bitpos */
1807 complain_overflow_dont, /* complain_on_overflow */
1808 ppc64_elf_unhandled_reloc, /* special_function */
1809 "R_PPC64_GOT_DTPREL16_HA", /* name */
1810 FALSE, /* partial_inplace */
1811 0, /* src_mask */
1812 0xffff, /* dst_mask */
1813 FALSE), /* pcrel_offset */
1814
1815 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1816 offset to the entry relative to the TOC base (r2). */
1817 HOWTO (R_PPC64_GOT_TPREL16_DS,
1818 0, /* rightshift */
1819 1, /* size (0 = byte, 1 = short, 2 = long) */
1820 16, /* bitsize */
1821 FALSE, /* pc_relative */
1822 0, /* bitpos */
1823 complain_overflow_signed, /* complain_on_overflow */
1824 ppc64_elf_unhandled_reloc, /* special_function */
1825 "R_PPC64_GOT_TPREL16_DS", /* name */
1826 FALSE, /* partial_inplace */
1827 0, /* src_mask */
1828 0xfffc, /* dst_mask */
1829 FALSE), /* pcrel_offset */
1830
1831 /* Like GOT_TPREL16_DS, but no overflow. */
1832 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1833 0, /* rightshift */
1834 1, /* size (0 = byte, 1 = short, 2 = long) */
1835 16, /* bitsize */
1836 FALSE, /* pc_relative */
1837 0, /* bitpos */
1838 complain_overflow_dont, /* complain_on_overflow */
1839 ppc64_elf_unhandled_reloc, /* special_function */
1840 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1841 FALSE, /* partial_inplace */
1842 0, /* src_mask */
1843 0xfffc, /* dst_mask */
1844 FALSE), /* pcrel_offset */
1845
1846 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1847 HOWTO (R_PPC64_GOT_TPREL16_HI,
1848 16, /* rightshift */
1849 1, /* size (0 = byte, 1 = short, 2 = long) */
1850 16, /* bitsize */
1851 FALSE, /* pc_relative */
1852 0, /* bitpos */
1853 complain_overflow_dont, /* complain_on_overflow */
1854 ppc64_elf_unhandled_reloc, /* special_function */
1855 "R_PPC64_GOT_TPREL16_HI", /* name */
1856 FALSE, /* partial_inplace */
1857 0, /* src_mask */
1858 0xffff, /* dst_mask */
1859 FALSE), /* pcrel_offset */
1860
1861 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1862 HOWTO (R_PPC64_GOT_TPREL16_HA,
1863 16, /* rightshift */
1864 1, /* size (0 = byte, 1 = short, 2 = long) */
1865 16, /* bitsize */
1866 FALSE, /* pc_relative */
1867 0, /* bitpos */
1868 complain_overflow_dont, /* complain_on_overflow */
1869 ppc64_elf_unhandled_reloc, /* special_function */
1870 "R_PPC64_GOT_TPREL16_HA", /* name */
1871 FALSE, /* partial_inplace */
1872 0, /* src_mask */
1873 0xffff, /* dst_mask */
1874 FALSE), /* pcrel_offset */
1875
1876 /* GNU extension to record C++ vtable hierarchy. */
1877 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1878 0, /* rightshift */
1879 0, /* size (0 = byte, 1 = short, 2 = long) */
1880 0, /* bitsize */
1881 FALSE, /* pc_relative */
1882 0, /* bitpos */
1883 complain_overflow_dont, /* complain_on_overflow */
1884 NULL, /* special_function */
1885 "R_PPC64_GNU_VTINHERIT", /* name */
1886 FALSE, /* partial_inplace */
1887 0, /* src_mask */
1888 0, /* dst_mask */
1889 FALSE), /* pcrel_offset */
1890
1891 /* GNU extension to record C++ vtable member usage. */
1892 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1893 0, /* rightshift */
1894 0, /* size (0 = byte, 1 = short, 2 = long) */
1895 0, /* bitsize */
1896 FALSE, /* pc_relative */
1897 0, /* bitpos */
1898 complain_overflow_dont, /* complain_on_overflow */
1899 NULL, /* special_function */
1900 "R_PPC64_GNU_VTENTRY", /* name */
1901 FALSE, /* partial_inplace */
1902 0, /* src_mask */
1903 0, /* dst_mask */
1904 FALSE), /* pcrel_offset */
1905 };
1906
1907 \f
1908 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1909 be done. */
1910
1911 static void
1912 ppc_howto_init (void)
1913 {
1914 unsigned int i, type;
1915
1916 for (i = 0;
1917 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1918 i++)
1919 {
1920 type = ppc64_elf_howto_raw[i].type;
1921 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1922 / sizeof (ppc64_elf_howto_table[0])));
1923 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1924 }
1925 }
1926
1927 static reloc_howto_type *
1928 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1929 bfd_reloc_code_real_type code)
1930 {
1931 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1932
1933 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1934 /* Initialize howto table if needed. */
1935 ppc_howto_init ();
1936
1937 switch (code)
1938 {
1939 default:
1940 return NULL;
1941
1942 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1943 break;
1944 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1945 break;
1946 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1947 break;
1948 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1949 break;
1950 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1951 break;
1952 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1953 break;
1954 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1955 break;
1956 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1957 break;
1958 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1959 break;
1960 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1961 break;
1962 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1963 break;
1964 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1965 break;
1966 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1967 break;
1968 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1969 break;
1970 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1971 break;
1972 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1973 break;
1974 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1975 break;
1976 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1977 break;
1978 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1979 break;
1980 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1981 break;
1982 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1983 break;
1984 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1985 break;
1986 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1987 break;
1988 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1989 break;
1990 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1991 break;
1992 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1993 break;
1994 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1995 break;
1996 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1997 break;
1998 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1999 break;
2000 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2001 break;
2002 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2003 break;
2004 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2005 break;
2006 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2007 break;
2008 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2009 break;
2010 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2011 break;
2012 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2013 break;
2014 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2015 break;
2016 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2017 break;
2018 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2019 break;
2020 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2021 break;
2022 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2023 break;
2024 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2025 break;
2026 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2027 break;
2028 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2029 break;
2030 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2031 break;
2032 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2033 break;
2034 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2035 break;
2036 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2037 break;
2038 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2039 break;
2040 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2041 break;
2042 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2043 break;
2044 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2045 break;
2046 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2047 break;
2048 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2049 break;
2050 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2051 break;
2052 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2053 break;
2054 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2055 break;
2056 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2057 break;
2058 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2059 break;
2060 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2061 break;
2062 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2063 break;
2064 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2065 break;
2066 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2067 break;
2068 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2069 break;
2070 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2071 break;
2072 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2073 break;
2074 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2075 break;
2076 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2077 break;
2078 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2079 break;
2080 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2081 break;
2082 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2083 break;
2084 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2085 break;
2086 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2087 break;
2088 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2089 break;
2090 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2091 break;
2092 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2093 break;
2094 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2095 break;
2096 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2097 break;
2098 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2099 break;
2100 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2101 break;
2102 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2103 break;
2104 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2105 break;
2106 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2107 break;
2108 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2109 break;
2110 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2111 break;
2112 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2113 break;
2114 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2115 break;
2116 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2117 break;
2118 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2119 break;
2120 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2121 break;
2122 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2123 break;
2124 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2125 break;
2126 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2127 break;
2128 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2129 break;
2130 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2131 break;
2132 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2133 break;
2134 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2135 break;
2136 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2137 break;
2138 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2139 break;
2140 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2141 break;
2142 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2143 break;
2144 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2145 break;
2146 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2147 break;
2148 }
2149
2150 return ppc64_elf_howto_table[r];
2151 };
2152
2153 static reloc_howto_type *
2154 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2155 const char *r_name)
2156 {
2157 unsigned int i;
2158
2159 for (i = 0;
2160 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2161 i++)
2162 if (ppc64_elf_howto_raw[i].name != NULL
2163 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2164 return &ppc64_elf_howto_raw[i];
2165
2166 return NULL;
2167 }
2168
2169 /* Set the howto pointer for a PowerPC ELF reloc. */
2170
2171 static void
2172 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2173 Elf_Internal_Rela *dst)
2174 {
2175 unsigned int type;
2176
2177 /* Initialize howto table if needed. */
2178 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2179 ppc_howto_init ();
2180
2181 type = ELF64_R_TYPE (dst->r_info);
2182 if (type >= (sizeof (ppc64_elf_howto_table)
2183 / sizeof (ppc64_elf_howto_table[0])))
2184 {
2185 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2186 abfd, (int) type);
2187 type = R_PPC64_NONE;
2188 }
2189 cache_ptr->howto = ppc64_elf_howto_table[type];
2190 }
2191
2192 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2193
2194 static bfd_reloc_status_type
2195 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2196 void *data, asection *input_section,
2197 bfd *output_bfd, char **error_message)
2198 {
2199 /* If this is a relocatable link (output_bfd test tells us), just
2200 call the generic function. Any adjustment will be done at final
2201 link time. */
2202 if (output_bfd != NULL)
2203 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2204 input_section, output_bfd, error_message);
2205
2206 /* Adjust the addend for sign extension of the low 16 bits.
2207 We won't actually be using the low 16 bits, so trashing them
2208 doesn't matter. */
2209 reloc_entry->addend += 0x8000;
2210 return bfd_reloc_continue;
2211 }
2212
2213 static bfd_reloc_status_type
2214 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2215 void *data, asection *input_section,
2216 bfd *output_bfd, char **error_message)
2217 {
2218 if (output_bfd != NULL)
2219 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2220 input_section, output_bfd, error_message);
2221
2222 if (strcmp (symbol->section->name, ".opd") == 0
2223 && (symbol->section->owner->flags & DYNAMIC) == 0)
2224 {
2225 bfd_vma dest = opd_entry_value (symbol->section,
2226 symbol->value + reloc_entry->addend,
2227 NULL, NULL);
2228 if (dest != (bfd_vma) -1)
2229 reloc_entry->addend = dest - (symbol->value
2230 + symbol->section->output_section->vma
2231 + symbol->section->output_offset);
2232 }
2233 return bfd_reloc_continue;
2234 }
2235
2236 static bfd_reloc_status_type
2237 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2238 void *data, asection *input_section,
2239 bfd *output_bfd, char **error_message)
2240 {
2241 long insn;
2242 enum elf_ppc64_reloc_type r_type;
2243 bfd_size_type octets;
2244 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2245 bfd_boolean is_power4 = FALSE;
2246
2247 /* If this is a relocatable link (output_bfd test tells us), just
2248 call the generic function. Any adjustment will be done at final
2249 link time. */
2250 if (output_bfd != NULL)
2251 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2252 input_section, output_bfd, error_message);
2253
2254 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2255 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2256 insn &= ~(0x01 << 21);
2257 r_type = reloc_entry->howto->type;
2258 if (r_type == R_PPC64_ADDR14_BRTAKEN
2259 || r_type == R_PPC64_REL14_BRTAKEN)
2260 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2261
2262 if (is_power4)
2263 {
2264 /* Set 'a' bit. This is 0b00010 in BO field for branch
2265 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2266 for branch on CTR insns (BO == 1a00t or 1a01t). */
2267 if ((insn & (0x14 << 21)) == (0x04 << 21))
2268 insn |= 0x02 << 21;
2269 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2270 insn |= 0x08 << 21;
2271 else
2272 goto out;
2273 }
2274 else
2275 {
2276 bfd_vma target = 0;
2277 bfd_vma from;
2278
2279 if (!bfd_is_com_section (symbol->section))
2280 target = symbol->value;
2281 target += symbol->section->output_section->vma;
2282 target += symbol->section->output_offset;
2283 target += reloc_entry->addend;
2284
2285 from = (reloc_entry->address
2286 + input_section->output_offset
2287 + input_section->output_section->vma);
2288
2289 /* Invert 'y' bit if not the default. */
2290 if ((bfd_signed_vma) (target - from) < 0)
2291 insn ^= 0x01 << 21;
2292 }
2293 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2294 out:
2295 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2296 input_section, output_bfd, error_message);
2297 }
2298
2299 static bfd_reloc_status_type
2300 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2301 void *data, asection *input_section,
2302 bfd *output_bfd, char **error_message)
2303 {
2304 /* If this is a relocatable link (output_bfd test tells us), just
2305 call the generic function. Any adjustment will be done at final
2306 link time. */
2307 if (output_bfd != NULL)
2308 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2309 input_section, output_bfd, error_message);
2310
2311 /* Subtract the symbol section base address. */
2312 reloc_entry->addend -= symbol->section->output_section->vma;
2313 return bfd_reloc_continue;
2314 }
2315
2316 static bfd_reloc_status_type
2317 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2318 void *data, asection *input_section,
2319 bfd *output_bfd, char **error_message)
2320 {
2321 /* If this is a relocatable link (output_bfd test tells us), just
2322 call the generic function. Any adjustment will be done at final
2323 link time. */
2324 if (output_bfd != NULL)
2325 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2326 input_section, output_bfd, error_message);
2327
2328 /* Subtract the symbol section base address. */
2329 reloc_entry->addend -= symbol->section->output_section->vma;
2330
2331 /* Adjust the addend for sign extension of the low 16 bits. */
2332 reloc_entry->addend += 0x8000;
2333 return bfd_reloc_continue;
2334 }
2335
2336 static bfd_reloc_status_type
2337 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2338 void *data, asection *input_section,
2339 bfd *output_bfd, char **error_message)
2340 {
2341 bfd_vma TOCstart;
2342
2343 /* If this is a relocatable link (output_bfd test tells us), just
2344 call the generic function. Any adjustment will be done at final
2345 link time. */
2346 if (output_bfd != NULL)
2347 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2348 input_section, output_bfd, error_message);
2349
2350 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2351 if (TOCstart == 0)
2352 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2353
2354 /* Subtract the TOC base address. */
2355 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2356 return bfd_reloc_continue;
2357 }
2358
2359 static bfd_reloc_status_type
2360 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2361 void *data, asection *input_section,
2362 bfd *output_bfd, char **error_message)
2363 {
2364 bfd_vma TOCstart;
2365
2366 /* If this is a relocatable link (output_bfd test tells us), just
2367 call the generic function. Any adjustment will be done at final
2368 link time. */
2369 if (output_bfd != NULL)
2370 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2371 input_section, output_bfd, error_message);
2372
2373 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2374 if (TOCstart == 0)
2375 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2376
2377 /* Subtract the TOC base address. */
2378 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2379
2380 /* Adjust the addend for sign extension of the low 16 bits. */
2381 reloc_entry->addend += 0x8000;
2382 return bfd_reloc_continue;
2383 }
2384
2385 static bfd_reloc_status_type
2386 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2387 void *data, asection *input_section,
2388 bfd *output_bfd, char **error_message)
2389 {
2390 bfd_vma TOCstart;
2391 bfd_size_type octets;
2392
2393 /* If this is a relocatable link (output_bfd test tells us), just
2394 call the generic function. Any adjustment will be done at final
2395 link time. */
2396 if (output_bfd != NULL)
2397 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2398 input_section, output_bfd, error_message);
2399
2400 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2401 if (TOCstart == 0)
2402 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2403
2404 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2405 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2406 return bfd_reloc_ok;
2407 }
2408
2409 static bfd_reloc_status_type
2410 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2411 void *data, asection *input_section,
2412 bfd *output_bfd, char **error_message)
2413 {
2414 /* If this is a relocatable link (output_bfd test tells us), just
2415 call the generic function. Any adjustment will be done at final
2416 link time. */
2417 if (output_bfd != NULL)
2418 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2419 input_section, output_bfd, error_message);
2420
2421 if (error_message != NULL)
2422 {
2423 static char buf[60];
2424 sprintf (buf, "generic linker can't handle %s",
2425 reloc_entry->howto->name);
2426 *error_message = buf;
2427 }
2428 return bfd_reloc_dangerous;
2429 }
2430
2431 struct ppc64_elf_obj_tdata
2432 {
2433 struct elf_obj_tdata elf;
2434
2435 /* Shortcuts to dynamic linker sections. */
2436 asection *got;
2437 asection *relgot;
2438
2439 /* Used during garbage collection. We attach global symbols defined
2440 on removed .opd entries to this section so that the sym is removed. */
2441 asection *deleted_section;
2442
2443 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2444 sections means we potentially need one of these for each input bfd. */
2445 union {
2446 bfd_signed_vma refcount;
2447 bfd_vma offset;
2448 } tlsld_got;
2449
2450 /* A copy of relocs before they are modified for --emit-relocs. */
2451 Elf_Internal_Rela *opd_relocs;
2452 };
2453
2454 #define ppc64_elf_tdata(bfd) \
2455 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2456
2457 #define ppc64_tlsld_got(bfd) \
2458 (&ppc64_elf_tdata (bfd)->tlsld_got)
2459
2460 #define is_ppc64_elf(bfd) \
2461 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2462 && elf_object_id (bfd) == PPC64_ELF_TDATA)
2463
2464 /* Override the generic function because we store some extras. */
2465
2466 static bfd_boolean
2467 ppc64_elf_mkobject (bfd *abfd)
2468 {
2469 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2470 PPC64_ELF_TDATA);
2471 }
2472
2473 /* Fix bad default arch selected for a 64 bit input bfd when the
2474 default is 32 bit. */
2475
2476 static bfd_boolean
2477 ppc64_elf_object_p (bfd *abfd)
2478 {
2479 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2480 {
2481 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2482
2483 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2484 {
2485 /* Relies on arch after 32 bit default being 64 bit default. */
2486 abfd->arch_info = abfd->arch_info->next;
2487 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2488 }
2489 }
2490 return TRUE;
2491 }
2492
2493 /* Support for core dump NOTE sections. */
2494
2495 static bfd_boolean
2496 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2497 {
2498 size_t offset, size;
2499
2500 if (note->descsz != 504)
2501 return FALSE;
2502
2503 /* pr_cursig */
2504 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2505
2506 /* pr_pid */
2507 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2508
2509 /* pr_reg */
2510 offset = 112;
2511 size = 384;
2512
2513 /* Make a ".reg/999" section. */
2514 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2515 size, note->descpos + offset);
2516 }
2517
2518 static bfd_boolean
2519 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2520 {
2521 if (note->descsz != 136)
2522 return FALSE;
2523
2524 elf_tdata (abfd)->core_program
2525 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2526 elf_tdata (abfd)->core_command
2527 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2528
2529 return TRUE;
2530 }
2531
2532 static char *
2533 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2534 ...)
2535 {
2536 switch (note_type)
2537 {
2538 default:
2539 return NULL;
2540
2541 case NT_PRPSINFO:
2542 {
2543 char data[136];
2544 va_list ap;
2545
2546 va_start (ap, note_type);
2547 memset (data, 0, 40);
2548 strncpy (data + 40, va_arg (ap, const char *), 16);
2549 strncpy (data + 56, va_arg (ap, const char *), 80);
2550 va_end (ap);
2551 return elfcore_write_note (abfd, buf, bufsiz,
2552 "CORE", note_type, data, sizeof (data));
2553 }
2554
2555 case NT_PRSTATUS:
2556 {
2557 char data[504];
2558 va_list ap;
2559 long pid;
2560 int cursig;
2561 const void *greg;
2562
2563 va_start (ap, note_type);
2564 memset (data, 0, 112);
2565 pid = va_arg (ap, long);
2566 bfd_put_32 (abfd, pid, data + 32);
2567 cursig = va_arg (ap, int);
2568 bfd_put_16 (abfd, cursig, data + 12);
2569 greg = va_arg (ap, const void *);
2570 memcpy (data + 112, greg, 384);
2571 memset (data + 496, 0, 8);
2572 va_end (ap);
2573 return elfcore_write_note (abfd, buf, bufsiz,
2574 "CORE", note_type, data, sizeof (data));
2575 }
2576 }
2577 }
2578
2579 /* Merge backend specific data from an object file to the output
2580 object file when linking. */
2581
2582 static bfd_boolean
2583 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2584 {
2585 /* Check if we have the same endianess. */
2586 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2587 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2588 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2589 {
2590 const char *msg;
2591
2592 if (bfd_big_endian (ibfd))
2593 msg = _("%B: compiled for a big endian system "
2594 "and target is little endian");
2595 else
2596 msg = _("%B: compiled for a little endian system "
2597 "and target is big endian");
2598
2599 (*_bfd_error_handler) (msg, ibfd);
2600
2601 bfd_set_error (bfd_error_wrong_format);
2602 return FALSE;
2603 }
2604
2605 return TRUE;
2606 }
2607
2608 /* Add extra PPC sections. */
2609
2610 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2611 {
2612 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2613 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2614 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2615 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2616 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2617 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2618 { NULL, 0, 0, 0, 0 }
2619 };
2620
2621 enum _ppc64_sec_type {
2622 sec_normal = 0,
2623 sec_opd = 1,
2624 sec_toc = 2
2625 };
2626
2627 struct _ppc64_elf_section_data
2628 {
2629 struct bfd_elf_section_data elf;
2630
2631 union
2632 {
2633 /* An array with one entry for each opd function descriptor. */
2634 struct _opd_sec_data
2635 {
2636 /* Points to the function code section for local opd entries. */
2637 asection **func_sec;
2638
2639 /* After editing .opd, adjust references to opd local syms. */
2640 long *adjust;
2641 } opd;
2642
2643 /* An array for toc sections, indexed by offset/8. */
2644 struct _toc_sec_data
2645 {
2646 /* Specifies the relocation symbol index used at a given toc offset. */
2647 unsigned *symndx;
2648
2649 /* And the relocation addend. */
2650 bfd_vma *add;
2651 } toc;
2652 } u;
2653
2654 enum _ppc64_sec_type sec_type:2;
2655
2656 /* Flag set when small branches are detected. Used to
2657 select suitable defaults for the stub group size. */
2658 unsigned int has_14bit_branch:1;
2659 };
2660
2661 #define ppc64_elf_section_data(sec) \
2662 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2663
2664 static bfd_boolean
2665 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2666 {
2667 if (!sec->used_by_bfd)
2668 {
2669 struct _ppc64_elf_section_data *sdata;
2670 bfd_size_type amt = sizeof (*sdata);
2671
2672 sdata = bfd_zalloc (abfd, amt);
2673 if (sdata == NULL)
2674 return FALSE;
2675 sec->used_by_bfd = sdata;
2676 }
2677
2678 return _bfd_elf_new_section_hook (abfd, sec);
2679 }
2680
2681 static struct _opd_sec_data *
2682 get_opd_info (asection * sec)
2683 {
2684 if (sec != NULL
2685 && ppc64_elf_section_data (sec) != NULL
2686 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2687 return &ppc64_elf_section_data (sec)->u.opd;
2688 return NULL;
2689 }
2690 \f
2691 /* Parameters for the qsort hook. */
2692 static bfd_boolean synthetic_relocatable;
2693
2694 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2695
2696 static int
2697 compare_symbols (const void *ap, const void *bp)
2698 {
2699 const asymbol *a = * (const asymbol **) ap;
2700 const asymbol *b = * (const asymbol **) bp;
2701
2702 /* Section symbols first. */
2703 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2704 return -1;
2705 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2706 return 1;
2707
2708 /* then .opd symbols. */
2709 if (strcmp (a->section->name, ".opd") == 0
2710 && strcmp (b->section->name, ".opd") != 0)
2711 return -1;
2712 if (strcmp (a->section->name, ".opd") != 0
2713 && strcmp (b->section->name, ".opd") == 0)
2714 return 1;
2715
2716 /* then other code symbols. */
2717 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2718 == (SEC_CODE | SEC_ALLOC)
2719 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2720 != (SEC_CODE | SEC_ALLOC))
2721 return -1;
2722
2723 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2724 != (SEC_CODE | SEC_ALLOC)
2725 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2726 == (SEC_CODE | SEC_ALLOC))
2727 return 1;
2728
2729 if (synthetic_relocatable)
2730 {
2731 if (a->section->id < b->section->id)
2732 return -1;
2733
2734 if (a->section->id > b->section->id)
2735 return 1;
2736 }
2737
2738 if (a->value + a->section->vma < b->value + b->section->vma)
2739 return -1;
2740
2741 if (a->value + a->section->vma > b->value + b->section->vma)
2742 return 1;
2743
2744 /* For syms with the same value, prefer strong dynamic global function
2745 syms over other syms. */
2746 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2747 return -1;
2748
2749 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2750 return 1;
2751
2752 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2753 return -1;
2754
2755 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2756 return 1;
2757
2758 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2759 return -1;
2760
2761 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2762 return 1;
2763
2764 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2765 return -1;
2766
2767 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2768 return 1;
2769
2770 return 0;
2771 }
2772
2773 /* Search SYMS for a symbol of the given VALUE. */
2774
2775 static asymbol *
2776 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2777 {
2778 long mid;
2779
2780 if (id == -1)
2781 {
2782 while (lo < hi)
2783 {
2784 mid = (lo + hi) >> 1;
2785 if (syms[mid]->value + syms[mid]->section->vma < value)
2786 lo = mid + 1;
2787 else if (syms[mid]->value + syms[mid]->section->vma > value)
2788 hi = mid;
2789 else
2790 return syms[mid];
2791 }
2792 }
2793 else
2794 {
2795 while (lo < hi)
2796 {
2797 mid = (lo + hi) >> 1;
2798 if (syms[mid]->section->id < id)
2799 lo = mid + 1;
2800 else if (syms[mid]->section->id > id)
2801 hi = mid;
2802 else if (syms[mid]->value < value)
2803 lo = mid + 1;
2804 else if (syms[mid]->value > value)
2805 hi = mid;
2806 else
2807 return syms[mid];
2808 }
2809 }
2810 return NULL;
2811 }
2812
2813 static bfd_boolean
2814 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2815 {
2816 bfd_vma vma = *(bfd_vma *) ptr;
2817 return ((section->flags & SEC_ALLOC) != 0
2818 && section->vma <= vma
2819 && vma < section->vma + section->size);
2820 }
2821
2822 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2823 entry syms. Also generate @plt symbols for the glink branch table. */
2824
2825 static long
2826 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2827 long static_count, asymbol **static_syms,
2828 long dyn_count, asymbol **dyn_syms,
2829 asymbol **ret)
2830 {
2831 asymbol *s;
2832 long i;
2833 long count;
2834 char *names;
2835 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2836 asection *opd;
2837 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2838 asymbol **syms;
2839
2840 *ret = NULL;
2841
2842 opd = bfd_get_section_by_name (abfd, ".opd");
2843 if (opd == NULL)
2844 return 0;
2845
2846 symcount = static_count;
2847 if (!relocatable)
2848 symcount += dyn_count;
2849 if (symcount == 0)
2850 return 0;
2851
2852 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2853 if (syms == NULL)
2854 return -1;
2855
2856 if (!relocatable && static_count != 0 && dyn_count != 0)
2857 {
2858 /* Use both symbol tables. */
2859 memcpy (syms, static_syms, static_count * sizeof (*syms));
2860 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2861 }
2862 else if (!relocatable && static_count == 0)
2863 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2864 else
2865 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2866
2867 synthetic_relocatable = relocatable;
2868 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2869
2870 if (!relocatable && symcount > 1)
2871 {
2872 long j;
2873 /* Trim duplicate syms, since we may have merged the normal and
2874 dynamic symbols. Actually, we only care about syms that have
2875 different values, so trim any with the same value. */
2876 for (i = 1, j = 1; i < symcount; ++i)
2877 if (syms[i - 1]->value + syms[i - 1]->section->vma
2878 != syms[i]->value + syms[i]->section->vma)
2879 syms[j++] = syms[i];
2880 symcount = j;
2881 }
2882
2883 i = 0;
2884 if (strcmp (syms[i]->section->name, ".opd") == 0)
2885 ++i;
2886 codesecsym = i;
2887
2888 for (; i < symcount; ++i)
2889 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2890 != (SEC_CODE | SEC_ALLOC))
2891 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2892 break;
2893 codesecsymend = i;
2894
2895 for (; i < symcount; ++i)
2896 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2897 break;
2898 secsymend = i;
2899
2900 for (; i < symcount; ++i)
2901 if (strcmp (syms[i]->section->name, ".opd") != 0)
2902 break;
2903 opdsymend = i;
2904
2905 for (; i < symcount; ++i)
2906 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2907 != (SEC_CODE | SEC_ALLOC))
2908 break;
2909 symcount = i;
2910
2911 count = 0;
2912
2913 if (relocatable)
2914 {
2915 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2916 arelent *r;
2917 size_t size;
2918 long relcount;
2919
2920 if (opdsymend == secsymend)
2921 goto done;
2922
2923 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2924 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2925 if (relcount == 0)
2926 goto done;
2927
2928 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2929 {
2930 count = -1;
2931 goto done;
2932 }
2933
2934 size = 0;
2935 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2936 {
2937 asymbol *sym;
2938
2939 while (r < opd->relocation + relcount
2940 && r->address < syms[i]->value + opd->vma)
2941 ++r;
2942
2943 if (r == opd->relocation + relcount)
2944 break;
2945
2946 if (r->address != syms[i]->value + opd->vma)
2947 continue;
2948
2949 if (r->howto->type != R_PPC64_ADDR64)
2950 continue;
2951
2952 sym = *r->sym_ptr_ptr;
2953 if (!sym_exists_at (syms, opdsymend, symcount,
2954 sym->section->id, sym->value + r->addend))
2955 {
2956 ++count;
2957 size += sizeof (asymbol);
2958 size += strlen (syms[i]->name) + 2;
2959 }
2960 }
2961
2962 s = *ret = bfd_malloc (size);
2963 if (s == NULL)
2964 {
2965 count = -1;
2966 goto done;
2967 }
2968
2969 names = (char *) (s + count);
2970
2971 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2972 {
2973 asymbol *sym;
2974
2975 while (r < opd->relocation + relcount
2976 && r->address < syms[i]->value + opd->vma)
2977 ++r;
2978
2979 if (r == opd->relocation + relcount)
2980 break;
2981
2982 if (r->address != syms[i]->value + opd->vma)
2983 continue;
2984
2985 if (r->howto->type != R_PPC64_ADDR64)
2986 continue;
2987
2988 sym = *r->sym_ptr_ptr;
2989 if (!sym_exists_at (syms, opdsymend, symcount,
2990 sym->section->id, sym->value + r->addend))
2991 {
2992 size_t len;
2993
2994 *s = *syms[i];
2995 s->flags |= BSF_SYNTHETIC;
2996 s->section = sym->section;
2997 s->value = sym->value + r->addend;
2998 s->name = names;
2999 *names++ = '.';
3000 len = strlen (syms[i]->name);
3001 memcpy (names, syms[i]->name, len + 1);
3002 names += len + 1;
3003 /* Have udata.p point back to the original symbol this
3004 synthetic symbol was derived from. */
3005 s->udata.p = syms[i];
3006 s++;
3007 }
3008 }
3009 }
3010 else
3011 {
3012 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3013 bfd_byte *contents;
3014 size_t size;
3015 long plt_count = 0;
3016 bfd_vma glink_vma = 0, resolv_vma = 0;
3017 asection *dynamic, *glink = NULL, *relplt = NULL;
3018 arelent *p;
3019
3020 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3021 {
3022 if (contents)
3023 {
3024 free_contents_and_exit:
3025 free (contents);
3026 }
3027 count = -1;
3028 goto done;
3029 }
3030
3031 size = 0;
3032 for (i = secsymend; i < opdsymend; ++i)
3033 {
3034 bfd_vma ent;
3035
3036 /* Ignore bogus symbols. */
3037 if (syms[i]->value > opd->size - 8)
3038 continue;
3039
3040 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3041 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3042 {
3043 ++count;
3044 size += sizeof (asymbol);
3045 size += strlen (syms[i]->name) + 2;
3046 }
3047 }
3048
3049 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3050 if (dyn_count != 0
3051 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3052 {
3053 bfd_byte *dynbuf, *extdyn, *extdynend;
3054 size_t extdynsize;
3055 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3056
3057 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3058 goto free_contents_and_exit;
3059
3060 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3061 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3062
3063 extdyn = dynbuf;
3064 extdynend = extdyn + dynamic->size;
3065 for (; extdyn < extdynend; extdyn += extdynsize)
3066 {
3067 Elf_Internal_Dyn dyn;
3068 (*swap_dyn_in) (abfd, extdyn, &dyn);
3069
3070 if (dyn.d_tag == DT_NULL)
3071 break;
3072
3073 if (dyn.d_tag == DT_PPC64_GLINK)
3074 {
3075 /* The first glink stub starts at offset 32; see comment in
3076 ppc64_elf_finish_dynamic_sections. */
3077 glink_vma = dyn.d_un.d_val + 32;
3078 /* The .glink section usually does not survive the final
3079 link; search for the section (usually .text) where the
3080 glink stubs now reside. */
3081 glink = bfd_sections_find_if (abfd, section_covers_vma,
3082 &glink_vma);
3083 break;
3084 }
3085 }
3086
3087 free (dynbuf);
3088 }
3089
3090 if (glink != NULL)
3091 {
3092 /* Determine __glink trampoline by reading the relative branch
3093 from the first glink stub. */
3094 bfd_byte buf[4];
3095 if (bfd_get_section_contents (abfd, glink, buf,
3096 glink_vma + 4 - glink->vma, 4))
3097 {
3098 unsigned int insn = bfd_get_32 (abfd, buf);
3099 insn ^= B_DOT;
3100 if ((insn & ~0x3fffffc) == 0)
3101 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3102 }
3103
3104 if (resolv_vma)
3105 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3106
3107 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3108 if (relplt != NULL)
3109 {
3110 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3111 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3112 goto free_contents_and_exit;
3113
3114 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3115 size += plt_count * sizeof (asymbol);
3116
3117 p = relplt->relocation;
3118 for (i = 0; i < plt_count; i++, p++)
3119 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3120 }
3121 }
3122
3123 s = *ret = bfd_malloc (size);
3124 if (s == NULL)
3125 goto free_contents_and_exit;
3126
3127 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3128
3129 for (i = secsymend; i < opdsymend; ++i)
3130 {
3131 bfd_vma ent;
3132
3133 if (syms[i]->value > opd->size - 8)
3134 continue;
3135
3136 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3137 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3138 {
3139 long lo, hi;
3140 size_t len;
3141 asection *sec = abfd->sections;
3142
3143 *s = *syms[i];
3144 lo = codesecsym;
3145 hi = codesecsymend;
3146 while (lo < hi)
3147 {
3148 long mid = (lo + hi) >> 1;
3149 if (syms[mid]->section->vma < ent)
3150 lo = mid + 1;
3151 else if (syms[mid]->section->vma > ent)
3152 hi = mid;
3153 else
3154 {
3155 sec = syms[mid]->section;
3156 break;
3157 }
3158 }
3159
3160 if (lo >= hi && lo > codesecsym)
3161 sec = syms[lo - 1]->section;
3162
3163 for (; sec != NULL; sec = sec->next)
3164 {
3165 if (sec->vma > ent)
3166 break;
3167 if ((sec->flags & SEC_ALLOC) == 0
3168 || (sec->flags & SEC_LOAD) == 0)
3169 break;
3170 if ((sec->flags & SEC_CODE) != 0)
3171 s->section = sec;
3172 }
3173 s->flags |= BSF_SYNTHETIC;
3174 s->value = ent - s->section->vma;
3175 s->name = names;
3176 *names++ = '.';
3177 len = strlen (syms[i]->name);
3178 memcpy (names, syms[i]->name, len + 1);
3179 names += len + 1;
3180 /* Have udata.p point back to the original symbol this
3181 synthetic symbol was derived from. */
3182 s->udata.p = syms[i];
3183 s++;
3184 }
3185 }
3186 free (contents);
3187
3188 if (glink != NULL && relplt != NULL)
3189 {
3190 if (resolv_vma)
3191 {
3192 /* Add a symbol for the main glink trampoline. */
3193 memset (s, 0, sizeof *s);
3194 s->the_bfd = abfd;
3195 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3196 s->section = glink;
3197 s->value = resolv_vma - glink->vma;
3198 s->name = names;
3199 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3200 names += sizeof ("__glink_PLTresolve");
3201 s++;
3202 count++;
3203 }
3204
3205 /* FIXME: It would be very much nicer to put sym@plt on the
3206 stub rather than on the glink branch table entry. The
3207 objdump disassembler would then use a sensible symbol
3208 name on plt calls. The difficulty in doing so is
3209 a) finding the stubs, and,
3210 b) matching stubs against plt entries, and,
3211 c) there can be multiple stubs for a given plt entry.
3212
3213 Solving (a) could be done by code scanning, but older
3214 ppc64 binaries used different stubs to current code.
3215 (b) is the tricky one since you need to known the toc
3216 pointer for at least one function that uses a pic stub to
3217 be able to calculate the plt address referenced.
3218 (c) means gdb would need to set multiple breakpoints (or
3219 find the glink branch itself) when setting breakpoints
3220 for pending shared library loads. */
3221 p = relplt->relocation;
3222 for (i = 0; i < plt_count; i++, p++)
3223 {
3224 size_t len;
3225
3226 *s = **p->sym_ptr_ptr;
3227 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3228 we are defining a symbol, ensure one of them is set. */
3229 if ((s->flags & BSF_LOCAL) == 0)
3230 s->flags |= BSF_GLOBAL;
3231 s->flags |= BSF_SYNTHETIC;
3232 s->section = glink;
3233 s->value = glink_vma - glink->vma;
3234 s->name = names;
3235 s->udata.p = NULL;
3236 len = strlen ((*p->sym_ptr_ptr)->name);
3237 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3238 names += len;
3239 memcpy (names, "@plt", sizeof ("@plt"));
3240 names += sizeof ("@plt");
3241 s++;
3242 glink_vma += 8;
3243 if (i >= 0x8000)
3244 glink_vma += 4;
3245 }
3246 count += plt_count;
3247 }
3248 }
3249
3250 done:
3251 free (syms);
3252 return count;
3253 }
3254 \f
3255 /* The following functions are specific to the ELF linker, while
3256 functions above are used generally. Those named ppc64_elf_* are
3257 called by the main ELF linker code. They appear in this file more
3258 or less in the order in which they are called. eg.
3259 ppc64_elf_check_relocs is called early in the link process,
3260 ppc64_elf_finish_dynamic_sections is one of the last functions
3261 called.
3262
3263 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3264 functions have both a function code symbol and a function descriptor
3265 symbol. A call to foo in a relocatable object file looks like:
3266
3267 . .text
3268 . x:
3269 . bl .foo
3270 . nop
3271
3272 The function definition in another object file might be:
3273
3274 . .section .opd
3275 . foo: .quad .foo
3276 . .quad .TOC.@tocbase
3277 . .quad 0
3278 .
3279 . .text
3280 . .foo: blr
3281
3282 When the linker resolves the call during a static link, the branch
3283 unsurprisingly just goes to .foo and the .opd information is unused.
3284 If the function definition is in a shared library, things are a little
3285 different: The call goes via a plt call stub, the opd information gets
3286 copied to the plt, and the linker patches the nop.
3287
3288 . x:
3289 . bl .foo_stub
3290 . ld 2,40(1)
3291 .
3292 .
3293 . .foo_stub:
3294 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3295 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3296 . std 2,40(1) # this is the general idea
3297 . ld 11,0(12)
3298 . ld 2,8(12)
3299 . mtctr 11
3300 . ld 11,16(12)
3301 . bctr
3302 .
3303 . .section .plt
3304 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3305
3306 The "reloc ()" notation is supposed to indicate that the linker emits
3307 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3308 copying.
3309
3310 What are the difficulties here? Well, firstly, the relocations
3311 examined by the linker in check_relocs are against the function code
3312 sym .foo, while the dynamic relocation in the plt is emitted against
3313 the function descriptor symbol, foo. Somewhere along the line, we need
3314 to carefully copy dynamic link information from one symbol to the other.
3315 Secondly, the generic part of the elf linker will make .foo a dynamic
3316 symbol as is normal for most other backends. We need foo dynamic
3317 instead, at least for an application final link. However, when
3318 creating a shared library containing foo, we need to have both symbols
3319 dynamic so that references to .foo are satisfied during the early
3320 stages of linking. Otherwise the linker might decide to pull in a
3321 definition from some other object, eg. a static library.
3322
3323 Update: As of August 2004, we support a new convention. Function
3324 calls may use the function descriptor symbol, ie. "bl foo". This
3325 behaves exactly as "bl .foo". */
3326
3327 /* The linker needs to keep track of the number of relocs that it
3328 decides to copy as dynamic relocs in check_relocs for each symbol.
3329 This is so that it can later discard them if they are found to be
3330 unnecessary. We store the information in a field extending the
3331 regular ELF linker hash table. */
3332
3333 struct ppc_dyn_relocs
3334 {
3335 struct ppc_dyn_relocs *next;
3336
3337 /* The input section of the reloc. */
3338 asection *sec;
3339
3340 /* Total number of relocs copied for the input section. */
3341 bfd_size_type count;
3342
3343 /* Number of pc-relative relocs copied for the input section. */
3344 bfd_size_type pc_count;
3345 };
3346
3347 /* Track GOT entries needed for a given symbol. We might need more
3348 than one got entry per symbol. */
3349 struct got_entry
3350 {
3351 struct got_entry *next;
3352
3353 /* The symbol addend that we'll be placing in the GOT. */
3354 bfd_vma addend;
3355
3356 /* Unlike other ELF targets, we use separate GOT entries for the same
3357 symbol referenced from different input files. This is to support
3358 automatic multiple TOC/GOT sections, where the TOC base can vary
3359 from one input file to another. FIXME: After group_sections we
3360 ought to merge entries within the group.
3361
3362 Point to the BFD owning this GOT entry. */
3363 bfd *owner;
3364
3365 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3366 TLS_TPREL or TLS_DTPREL for tls entries. */
3367 char tls_type;
3368
3369 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3370 union
3371 {
3372 bfd_signed_vma refcount;
3373 bfd_vma offset;
3374 } got;
3375 };
3376
3377 /* The same for PLT. */
3378 struct plt_entry
3379 {
3380 struct plt_entry *next;
3381
3382 bfd_vma addend;
3383
3384 union
3385 {
3386 bfd_signed_vma refcount;
3387 bfd_vma offset;
3388 } plt;
3389 };
3390
3391 /* Of those relocs that might be copied as dynamic relocs, this function
3392 selects those that must be copied when linking a shared library,
3393 even when the symbol is local. */
3394
3395 static int
3396 must_be_dyn_reloc (struct bfd_link_info *info,
3397 enum elf_ppc64_reloc_type r_type)
3398 {
3399 switch (r_type)
3400 {
3401 default:
3402 return 1;
3403
3404 case R_PPC64_REL32:
3405 case R_PPC64_REL64:
3406 case R_PPC64_REL30:
3407 return 0;
3408
3409 case R_PPC64_TPREL16:
3410 case R_PPC64_TPREL16_LO:
3411 case R_PPC64_TPREL16_HI:
3412 case R_PPC64_TPREL16_HA:
3413 case R_PPC64_TPREL16_DS:
3414 case R_PPC64_TPREL16_LO_DS:
3415 case R_PPC64_TPREL16_HIGHER:
3416 case R_PPC64_TPREL16_HIGHERA:
3417 case R_PPC64_TPREL16_HIGHEST:
3418 case R_PPC64_TPREL16_HIGHESTA:
3419 case R_PPC64_TPREL64:
3420 return !info->executable;
3421 }
3422 }
3423
3424 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3425 copying dynamic variables from a shared lib into an app's dynbss
3426 section, and instead use a dynamic relocation to point into the
3427 shared lib. With code that gcc generates, it's vital that this be
3428 enabled; In the PowerPC64 ABI, the address of a function is actually
3429 the address of a function descriptor, which resides in the .opd
3430 section. gcc uses the descriptor directly rather than going via the
3431 GOT as some other ABI's do, which means that initialized function
3432 pointers must reference the descriptor. Thus, a function pointer
3433 initialized to the address of a function in a shared library will
3434 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3435 redefines the function descriptor symbol to point to the copy. This
3436 presents a problem as a plt entry for that function is also
3437 initialized from the function descriptor symbol and the copy reloc
3438 may not be initialized first. */
3439 #define ELIMINATE_COPY_RELOCS 1
3440
3441 /* Section name for stubs is the associated section name plus this
3442 string. */
3443 #define STUB_SUFFIX ".stub"
3444
3445 /* Linker stubs.
3446 ppc_stub_long_branch:
3447 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3448 destination, but a 24 bit branch in a stub section will reach.
3449 . b dest
3450
3451 ppc_stub_plt_branch:
3452 Similar to the above, but a 24 bit branch in the stub section won't
3453 reach its destination.
3454 . addis %r12,%r2,xxx@toc@ha
3455 . ld %r11,xxx@toc@l(%r12)
3456 . mtctr %r11
3457 . bctr
3458
3459 ppc_stub_plt_call:
3460 Used to call a function in a shared library. If it so happens that
3461 the plt entry referenced crosses a 64k boundary, then an extra
3462 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3463 . addis %r12,%r2,xxx@toc@ha
3464 . std %r2,40(%r1)
3465 . ld %r11,xxx+0@toc@l(%r12)
3466 . mtctr %r11
3467 . ld %r2,xxx+8@toc@l(%r12)
3468 . ld %r11,xxx+16@toc@l(%r12)
3469 . bctr
3470
3471 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3472 code to adjust the value and save r2 to support multiple toc sections.
3473 A ppc_stub_long_branch with an r2 offset looks like:
3474 . std %r2,40(%r1)
3475 . addis %r2,%r2,off@ha
3476 . addi %r2,%r2,off@l
3477 . b dest
3478
3479 A ppc_stub_plt_branch with an r2 offset looks like:
3480 . std %r2,40(%r1)
3481 . addis %r12,%r2,xxx@toc@ha
3482 . ld %r11,xxx@toc@l(%r12)
3483 . addis %r2,%r2,off@ha
3484 . addi %r2,%r2,off@l
3485 . mtctr %r11
3486 . bctr
3487
3488 In cases where the "addis" instruction would add zero, the "addis" is
3489 omitted and following instructions modified slightly in some cases.
3490 */
3491
3492 enum ppc_stub_type {
3493 ppc_stub_none,
3494 ppc_stub_long_branch,
3495 ppc_stub_long_branch_r2off,
3496 ppc_stub_plt_branch,
3497 ppc_stub_plt_branch_r2off,
3498 ppc_stub_plt_call
3499 };
3500
3501 struct ppc_stub_hash_entry {
3502
3503 /* Base hash table entry structure. */
3504 struct bfd_hash_entry root;
3505
3506 enum ppc_stub_type stub_type;
3507
3508 /* The stub section. */
3509 asection *stub_sec;
3510
3511 /* Offset within stub_sec of the beginning of this stub. */
3512 bfd_vma stub_offset;
3513
3514 /* Given the symbol's value and its section we can determine its final
3515 value when building the stubs (so the stub knows where to jump. */
3516 bfd_vma target_value;
3517 asection *target_section;
3518
3519 /* The symbol table entry, if any, that this was derived from. */
3520 struct ppc_link_hash_entry *h;
3521
3522 /* And the reloc addend that this was derived from. */
3523 bfd_vma addend;
3524
3525 /* Where this stub is being called from, or, in the case of combined
3526 stub sections, the first input section in the group. */
3527 asection *id_sec;
3528 };
3529
3530 struct ppc_branch_hash_entry {
3531
3532 /* Base hash table entry structure. */
3533 struct bfd_hash_entry root;
3534
3535 /* Offset within branch lookup table. */
3536 unsigned int offset;
3537
3538 /* Generation marker. */
3539 unsigned int iter;
3540 };
3541
3542 struct ppc_link_hash_entry
3543 {
3544 struct elf_link_hash_entry elf;
3545
3546 union {
3547 /* A pointer to the most recently used stub hash entry against this
3548 symbol. */
3549 struct ppc_stub_hash_entry *stub_cache;
3550
3551 /* A pointer to the next symbol starting with a '.' */
3552 struct ppc_link_hash_entry *next_dot_sym;
3553 } u;
3554
3555 /* Track dynamic relocs copied for this symbol. */
3556 struct ppc_dyn_relocs *dyn_relocs;
3557
3558 /* Link between function code and descriptor symbols. */
3559 struct ppc_link_hash_entry *oh;
3560
3561 /* Flag function code and descriptor symbols. */
3562 unsigned int is_func:1;
3563 unsigned int is_func_descriptor:1;
3564 unsigned int fake:1;
3565
3566 /* Whether global opd/toc sym has been adjusted or not.
3567 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3568 should be set for all globals defined in any opd/toc section. */
3569 unsigned int adjust_done:1;
3570
3571 /* Set if we twiddled this symbol to weak at some stage. */
3572 unsigned int was_undefined:1;
3573
3574 /* Contexts in which symbol is used in the GOT (or TOC).
3575 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3576 corresponding relocs are encountered during check_relocs.
3577 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3578 indicate the corresponding GOT entry type is not needed.
3579 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3580 a TPREL one. We use a separate flag rather than setting TPREL
3581 just for convenience in distinguishing the two cases. */
3582 #define TLS_GD 1 /* GD reloc. */
3583 #define TLS_LD 2 /* LD reloc. */
3584 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3585 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3586 #define TLS_TLS 16 /* Any TLS reloc. */
3587 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3588 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3589 char tls_mask;
3590 };
3591
3592 /* ppc64 ELF linker hash table. */
3593
3594 struct ppc_link_hash_table
3595 {
3596 struct elf_link_hash_table elf;
3597
3598 /* The stub hash table. */
3599 struct bfd_hash_table stub_hash_table;
3600
3601 /* Another hash table for plt_branch stubs. */
3602 struct bfd_hash_table branch_hash_table;
3603
3604 /* Linker stub bfd. */
3605 bfd *stub_bfd;
3606
3607 /* Linker call-backs. */
3608 asection * (*add_stub_section) (const char *, asection *);
3609 void (*layout_sections_again) (void);
3610
3611 /* Array to keep track of which stub sections have been created, and
3612 information on stub grouping. */
3613 struct map_stub {
3614 /* This is the section to which stubs in the group will be attached. */
3615 asection *link_sec;
3616 /* The stub section. */
3617 asection *stub_sec;
3618 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3619 bfd_vma toc_off;
3620 } *stub_group;
3621
3622 /* Temp used when calculating TOC pointers. */
3623 bfd_vma toc_curr;
3624
3625 /* Highest input section id. */
3626 int top_id;
3627
3628 /* Highest output section index. */
3629 int top_index;
3630
3631 /* Used when adding symbols. */
3632 struct ppc_link_hash_entry *dot_syms;
3633
3634 /* List of input sections for each output section. */
3635 asection **input_list;
3636
3637 /* Short-cuts to get to dynamic linker sections. */
3638 asection *got;
3639 asection *plt;
3640 asection *relplt;
3641 asection *dynbss;
3642 asection *relbss;
3643 asection *glink;
3644 asection *sfpr;
3645 asection *brlt;
3646 asection *relbrlt;
3647
3648 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3649 struct ppc_link_hash_entry *tls_get_addr;
3650 struct ppc_link_hash_entry *tls_get_addr_fd;
3651
3652 /* Statistics. */
3653 unsigned long stub_count[ppc_stub_plt_call];
3654
3655 /* Number of stubs against global syms. */
3656 unsigned long stub_globals;
3657
3658 /* Set if we should emit symbols for stubs. */
3659 unsigned int emit_stub_syms:1;
3660
3661 /* Support for multiple toc sections. */
3662 unsigned int no_multi_toc:1;
3663 unsigned int multi_toc_needed:1;
3664
3665 /* Set on error. */
3666 unsigned int stub_error:1;
3667
3668 /* Temp used by ppc64_elf_process_dot_syms. */
3669 unsigned int twiddled_syms:1;
3670
3671 /* Incremented every time we size stubs. */
3672 unsigned int stub_iteration;
3673
3674 /* Small local sym to section mapping cache. */
3675 struct sym_sec_cache sym_sec;
3676 };
3677
3678 /* Rename some of the generic section flags to better document how they
3679 are used here. */
3680 #define has_toc_reloc has_gp_reloc
3681 #define makes_toc_func_call need_finalize_relax
3682 #define call_check_in_progress reloc_done
3683
3684 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3685
3686 #define ppc_hash_table(p) \
3687 ((struct ppc_link_hash_table *) ((p)->hash))
3688
3689 #define ppc_stub_hash_lookup(table, string, create, copy) \
3690 ((struct ppc_stub_hash_entry *) \
3691 bfd_hash_lookup ((table), (string), (create), (copy)))
3692
3693 #define ppc_branch_hash_lookup(table, string, create, copy) \
3694 ((struct ppc_branch_hash_entry *) \
3695 bfd_hash_lookup ((table), (string), (create), (copy)))
3696
3697 /* Create an entry in the stub hash table. */
3698
3699 static struct bfd_hash_entry *
3700 stub_hash_newfunc (struct bfd_hash_entry *entry,
3701 struct bfd_hash_table *table,
3702 const char *string)
3703 {
3704 /* Allocate the structure if it has not already been allocated by a
3705 subclass. */
3706 if (entry == NULL)
3707 {
3708 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3709 if (entry == NULL)
3710 return entry;
3711 }
3712
3713 /* Call the allocation method of the superclass. */
3714 entry = bfd_hash_newfunc (entry, table, string);
3715 if (entry != NULL)
3716 {
3717 struct ppc_stub_hash_entry *eh;
3718
3719 /* Initialize the local fields. */
3720 eh = (struct ppc_stub_hash_entry *) entry;
3721 eh->stub_type = ppc_stub_none;
3722 eh->stub_sec = NULL;
3723 eh->stub_offset = 0;
3724 eh->target_value = 0;
3725 eh->target_section = NULL;
3726 eh->h = NULL;
3727 eh->id_sec = NULL;
3728 }
3729
3730 return entry;
3731 }
3732
3733 /* Create an entry in the branch hash table. */
3734
3735 static struct bfd_hash_entry *
3736 branch_hash_newfunc (struct bfd_hash_entry *entry,
3737 struct bfd_hash_table *table,
3738 const char *string)
3739 {
3740 /* Allocate the structure if it has not already been allocated by a
3741 subclass. */
3742 if (entry == NULL)
3743 {
3744 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3745 if (entry == NULL)
3746 return entry;
3747 }
3748
3749 /* Call the allocation method of the superclass. */
3750 entry = bfd_hash_newfunc (entry, table, string);
3751 if (entry != NULL)
3752 {
3753 struct ppc_branch_hash_entry *eh;
3754
3755 /* Initialize the local fields. */
3756 eh = (struct ppc_branch_hash_entry *) entry;
3757 eh->offset = 0;
3758 eh->iter = 0;
3759 }
3760
3761 return entry;
3762 }
3763
3764 /* Create an entry in a ppc64 ELF linker hash table. */
3765
3766 static struct bfd_hash_entry *
3767 link_hash_newfunc (struct bfd_hash_entry *entry,
3768 struct bfd_hash_table *table,
3769 const char *string)
3770 {
3771 /* Allocate the structure if it has not already been allocated by a
3772 subclass. */
3773 if (entry == NULL)
3774 {
3775 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3776 if (entry == NULL)
3777 return entry;
3778 }
3779
3780 /* Call the allocation method of the superclass. */
3781 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3782 if (entry != NULL)
3783 {
3784 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3785
3786 memset (&eh->u.stub_cache, 0,
3787 (sizeof (struct ppc_link_hash_entry)
3788 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3789
3790 /* When making function calls, old ABI code references function entry
3791 points (dot symbols), while new ABI code references the function
3792 descriptor symbol. We need to make any combination of reference and
3793 definition work together, without breaking archive linking.
3794
3795 For a defined function "foo" and an undefined call to "bar":
3796 An old object defines "foo" and ".foo", references ".bar" (possibly
3797 "bar" too).
3798 A new object defines "foo" and references "bar".
3799
3800 A new object thus has no problem with its undefined symbols being
3801 satisfied by definitions in an old object. On the other hand, the
3802 old object won't have ".bar" satisfied by a new object.
3803
3804 Keep a list of newly added dot-symbols. */
3805
3806 if (string[0] == '.')
3807 {
3808 struct ppc_link_hash_table *htab;
3809
3810 htab = (struct ppc_link_hash_table *) table;
3811 eh->u.next_dot_sym = htab->dot_syms;
3812 htab->dot_syms = eh;
3813 }
3814 }
3815
3816 return entry;
3817 }
3818
3819 /* Create a ppc64 ELF linker hash table. */
3820
3821 static struct bfd_link_hash_table *
3822 ppc64_elf_link_hash_table_create (bfd *abfd)
3823 {
3824 struct ppc_link_hash_table *htab;
3825 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3826
3827 htab = bfd_zmalloc (amt);
3828 if (htab == NULL)
3829 return NULL;
3830
3831 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3832 sizeof (struct ppc_link_hash_entry)))
3833 {
3834 free (htab);
3835 return NULL;
3836 }
3837
3838 /* Init the stub hash table too. */
3839 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3840 sizeof (struct ppc_stub_hash_entry)))
3841 return NULL;
3842
3843 /* And the branch hash table. */
3844 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3845 sizeof (struct ppc_branch_hash_entry)))
3846 return NULL;
3847
3848 /* Initializing two fields of the union is just cosmetic. We really
3849 only care about glist, but when compiled on a 32-bit host the
3850 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3851 debugger inspection of these fields look nicer. */
3852 htab->elf.init_got_refcount.refcount = 0;
3853 htab->elf.init_got_refcount.glist = NULL;
3854 htab->elf.init_plt_refcount.refcount = 0;
3855 htab->elf.init_plt_refcount.glist = NULL;
3856 htab->elf.init_got_offset.offset = 0;
3857 htab->elf.init_got_offset.glist = NULL;
3858 htab->elf.init_plt_offset.offset = 0;
3859 htab->elf.init_plt_offset.glist = NULL;
3860
3861 return &htab->elf.root;
3862 }
3863
3864 /* Free the derived linker hash table. */
3865
3866 static void
3867 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3868 {
3869 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3870
3871 bfd_hash_table_free (&ret->stub_hash_table);
3872 bfd_hash_table_free (&ret->branch_hash_table);
3873 _bfd_generic_link_hash_table_free (hash);
3874 }
3875
3876 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3877
3878 void
3879 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3880 {
3881 struct ppc_link_hash_table *htab;
3882
3883 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3884
3885 /* Always hook our dynamic sections into the first bfd, which is the
3886 linker created stub bfd. This ensures that the GOT header is at
3887 the start of the output TOC section. */
3888 htab = ppc_hash_table (info);
3889 htab->stub_bfd = abfd;
3890 htab->elf.dynobj = abfd;
3891 }
3892
3893 /* Build a name for an entry in the stub hash table. */
3894
3895 static char *
3896 ppc_stub_name (const asection *input_section,
3897 const asection *sym_sec,
3898 const struct ppc_link_hash_entry *h,
3899 const Elf_Internal_Rela *rel)
3900 {
3901 char *stub_name;
3902 bfd_size_type len;
3903
3904 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3905 offsets from a sym as a branch target? In fact, we could
3906 probably assume the addend is always zero. */
3907 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3908
3909 if (h)
3910 {
3911 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3912 stub_name = bfd_malloc (len);
3913 if (stub_name == NULL)
3914 return stub_name;
3915
3916 sprintf (stub_name, "%08x.%s+%x",
3917 input_section->id & 0xffffffff,
3918 h->elf.root.root.string,
3919 (int) rel->r_addend & 0xffffffff);
3920 }
3921 else
3922 {
3923 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3924 stub_name = bfd_malloc (len);
3925 if (stub_name == NULL)
3926 return stub_name;
3927
3928 sprintf (stub_name, "%08x.%x:%x+%x",
3929 input_section->id & 0xffffffff,
3930 sym_sec->id & 0xffffffff,
3931 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3932 (int) rel->r_addend & 0xffffffff);
3933 }
3934 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3935 stub_name[len - 2] = 0;
3936 return stub_name;
3937 }
3938
3939 /* Look up an entry in the stub hash. Stub entries are cached because
3940 creating the stub name takes a bit of time. */
3941
3942 static struct ppc_stub_hash_entry *
3943 ppc_get_stub_entry (const asection *input_section,
3944 const asection *sym_sec,
3945 struct ppc_link_hash_entry *h,
3946 const Elf_Internal_Rela *rel,
3947 struct ppc_link_hash_table *htab)
3948 {
3949 struct ppc_stub_hash_entry *stub_entry;
3950 const asection *id_sec;
3951
3952 /* If this input section is part of a group of sections sharing one
3953 stub section, then use the id of the first section in the group.
3954 Stub names need to include a section id, as there may well be
3955 more than one stub used to reach say, printf, and we need to
3956 distinguish between them. */
3957 id_sec = htab->stub_group[input_section->id].link_sec;
3958
3959 if (h != NULL && h->u.stub_cache != NULL
3960 && h->u.stub_cache->h == h
3961 && h->u.stub_cache->id_sec == id_sec)
3962 {
3963 stub_entry = h->u.stub_cache;
3964 }
3965 else
3966 {
3967 char *stub_name;
3968
3969 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3970 if (stub_name == NULL)
3971 return NULL;
3972
3973 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3974 stub_name, FALSE, FALSE);
3975 if (h != NULL)
3976 h->u.stub_cache = stub_entry;
3977
3978 free (stub_name);
3979 }
3980
3981 return stub_entry;
3982 }
3983
3984 /* Add a new stub entry to the stub hash. Not all fields of the new
3985 stub entry are initialised. */
3986
3987 static struct ppc_stub_hash_entry *
3988 ppc_add_stub (const char *stub_name,
3989 asection *section,
3990 struct ppc_link_hash_table *htab)
3991 {
3992 asection *link_sec;
3993 asection *stub_sec;
3994 struct ppc_stub_hash_entry *stub_entry;
3995
3996 link_sec = htab->stub_group[section->id].link_sec;
3997 stub_sec = htab->stub_group[section->id].stub_sec;
3998 if (stub_sec == NULL)
3999 {
4000 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4001 if (stub_sec == NULL)
4002 {
4003 size_t namelen;
4004 bfd_size_type len;
4005 char *s_name;
4006
4007 namelen = strlen (link_sec->name);
4008 len = namelen + sizeof (STUB_SUFFIX);
4009 s_name = bfd_alloc (htab->stub_bfd, len);
4010 if (s_name == NULL)
4011 return NULL;
4012
4013 memcpy (s_name, link_sec->name, namelen);
4014 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4015 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4016 if (stub_sec == NULL)
4017 return NULL;
4018 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4019 }
4020 htab->stub_group[section->id].stub_sec = stub_sec;
4021 }
4022
4023 /* Enter this entry into the linker stub hash table. */
4024 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4025 TRUE, FALSE);
4026 if (stub_entry == NULL)
4027 {
4028 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4029 section->owner, stub_name);
4030 return NULL;
4031 }
4032
4033 stub_entry->stub_sec = stub_sec;
4034 stub_entry->stub_offset = 0;
4035 stub_entry->id_sec = link_sec;
4036 return stub_entry;
4037 }
4038
4039 /* Create sections for linker generated code. */
4040
4041 static bfd_boolean
4042 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4043 {
4044 struct ppc_link_hash_table *htab;
4045 flagword flags;
4046
4047 htab = ppc_hash_table (info);
4048
4049 /* Create .sfpr for code to save and restore fp regs. */
4050 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4051 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4052 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4053 flags);
4054 if (htab->sfpr == NULL
4055 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4056 return FALSE;
4057
4058 /* Create .glink for lazy dynamic linking support. */
4059 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4060 flags);
4061 if (htab->glink == NULL
4062 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4063 return FALSE;
4064
4065 /* Create branch lookup table for plt_branch stubs. */
4066 flags = (SEC_ALLOC | SEC_LOAD
4067 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4068 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4069 flags);
4070 if (htab->brlt == NULL
4071 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4072 return FALSE;
4073
4074 if (!info->shared)
4075 return TRUE;
4076
4077 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4078 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4079 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4080 ".rela.branch_lt",
4081 flags);
4082 if (!htab->relbrlt
4083 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4084 return FALSE;
4085
4086 return TRUE;
4087 }
4088
4089 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4090 not already done. */
4091
4092 static bfd_boolean
4093 create_got_section (bfd *abfd, struct bfd_link_info *info)
4094 {
4095 asection *got, *relgot;
4096 flagword flags;
4097 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4098
4099 if (!is_ppc64_elf (abfd))
4100 return FALSE;
4101
4102 if (!htab->got)
4103 {
4104 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4105 return FALSE;
4106
4107 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4108 if (!htab->got)
4109 abort ();
4110 }
4111
4112 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4113 | SEC_LINKER_CREATED);
4114
4115 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4116 if (!got
4117 || !bfd_set_section_alignment (abfd, got, 3))
4118 return FALSE;
4119
4120 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4121 flags | SEC_READONLY);
4122 if (!relgot
4123 || ! bfd_set_section_alignment (abfd, relgot, 3))
4124 return FALSE;
4125
4126 ppc64_elf_tdata (abfd)->got = got;
4127 ppc64_elf_tdata (abfd)->relgot = relgot;
4128 return TRUE;
4129 }
4130
4131 /* Create the dynamic sections, and set up shortcuts. */
4132
4133 static bfd_boolean
4134 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4135 {
4136 struct ppc_link_hash_table *htab;
4137
4138 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4139 return FALSE;
4140
4141 htab = ppc_hash_table (info);
4142 if (!htab->got)
4143 htab->got = bfd_get_section_by_name (dynobj, ".got");
4144 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4145 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4146 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4147 if (!info->shared)
4148 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4149
4150 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4151 || (!info->shared && !htab->relbss))
4152 abort ();
4153
4154 return TRUE;
4155 }
4156
4157 /* Merge PLT info on FROM with that on TO. */
4158
4159 static void
4160 move_plt_plist (struct ppc_link_hash_entry *from,
4161 struct ppc_link_hash_entry *to)
4162 {
4163 if (from->elf.plt.plist != NULL)
4164 {
4165 if (to->elf.plt.plist != NULL)
4166 {
4167 struct plt_entry **entp;
4168 struct plt_entry *ent;
4169
4170 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4171 {
4172 struct plt_entry *dent;
4173
4174 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4175 if (dent->addend == ent->addend)
4176 {
4177 dent->plt.refcount += ent->plt.refcount;
4178 *entp = ent->next;
4179 break;
4180 }
4181 if (dent == NULL)
4182 entp = &ent->next;
4183 }
4184 *entp = to->elf.plt.plist;
4185 }
4186
4187 to->elf.plt.plist = from->elf.plt.plist;
4188 from->elf.plt.plist = NULL;
4189 }
4190 }
4191
4192 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4193
4194 static void
4195 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4196 struct elf_link_hash_entry *dir,
4197 struct elf_link_hash_entry *ind)
4198 {
4199 struct ppc_link_hash_entry *edir, *eind;
4200
4201 edir = (struct ppc_link_hash_entry *) dir;
4202 eind = (struct ppc_link_hash_entry *) ind;
4203
4204 /* Copy over any dynamic relocs we may have on the indirect sym. */
4205 if (eind->dyn_relocs != NULL)
4206 {
4207 if (edir->dyn_relocs != NULL)
4208 {
4209 struct ppc_dyn_relocs **pp;
4210 struct ppc_dyn_relocs *p;
4211
4212 /* Add reloc counts against the indirect sym to the direct sym
4213 list. Merge any entries against the same section. */
4214 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4215 {
4216 struct ppc_dyn_relocs *q;
4217
4218 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4219 if (q->sec == p->sec)
4220 {
4221 q->pc_count += p->pc_count;
4222 q->count += p->count;
4223 *pp = p->next;
4224 break;
4225 }
4226 if (q == NULL)
4227 pp = &p->next;
4228 }
4229 *pp = edir->dyn_relocs;
4230 }
4231
4232 edir->dyn_relocs = eind->dyn_relocs;
4233 eind->dyn_relocs = NULL;
4234 }
4235
4236 edir->is_func |= eind->is_func;
4237 edir->is_func_descriptor |= eind->is_func_descriptor;
4238 edir->tls_mask |= eind->tls_mask;
4239
4240 /* If called to transfer flags for a weakdef during processing
4241 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4242 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4243 if (!(ELIMINATE_COPY_RELOCS
4244 && eind->elf.root.type != bfd_link_hash_indirect
4245 && edir->elf.dynamic_adjusted))
4246 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4247
4248 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4249 edir->elf.ref_regular |= eind->elf.ref_regular;
4250 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4251 edir->elf.needs_plt |= eind->elf.needs_plt;
4252
4253 /* If we were called to copy over info for a weak sym, that's all. */
4254 if (eind->elf.root.type != bfd_link_hash_indirect)
4255 return;
4256
4257 /* Copy over got entries that we may have already seen to the
4258 symbol which just became indirect. */
4259 if (eind->elf.got.glist != NULL)
4260 {
4261 if (edir->elf.got.glist != NULL)
4262 {
4263 struct got_entry **entp;
4264 struct got_entry *ent;
4265
4266 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4267 {
4268 struct got_entry *dent;
4269
4270 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4271 if (dent->addend == ent->addend
4272 && dent->owner == ent->owner
4273 && dent->tls_type == ent->tls_type)
4274 {
4275 dent->got.refcount += ent->got.refcount;
4276 *entp = ent->next;
4277 break;
4278 }
4279 if (dent == NULL)
4280 entp = &ent->next;
4281 }
4282 *entp = edir->elf.got.glist;
4283 }
4284
4285 edir->elf.got.glist = eind->elf.got.glist;
4286 eind->elf.got.glist = NULL;
4287 }
4288
4289 /* And plt entries. */
4290 move_plt_plist (eind, edir);
4291
4292 if (eind->elf.dynindx != -1)
4293 {
4294 if (edir->elf.dynindx != -1)
4295 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4296 edir->elf.dynstr_index);
4297 edir->elf.dynindx = eind->elf.dynindx;
4298 edir->elf.dynstr_index = eind->elf.dynstr_index;
4299 eind->elf.dynindx = -1;
4300 eind->elf.dynstr_index = 0;
4301 }
4302 }
4303
4304 /* Find the function descriptor hash entry from the given function code
4305 hash entry FH. Link the entries via their OH fields. */
4306
4307 static struct ppc_link_hash_entry *
4308 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4309 {
4310 struct ppc_link_hash_entry *fdh = fh->oh;
4311
4312 if (fdh == NULL)
4313 {
4314 const char *fd_name = fh->elf.root.root.string + 1;
4315
4316 fdh = (struct ppc_link_hash_entry *)
4317 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4318 if (fdh != NULL)
4319 {
4320 fdh->is_func_descriptor = 1;
4321 fdh->oh = fh;
4322 fh->is_func = 1;
4323 fh->oh = fdh;
4324 }
4325 }
4326
4327 return fdh;
4328 }
4329
4330 /* Make a fake function descriptor sym for the code sym FH. */
4331
4332 static struct ppc_link_hash_entry *
4333 make_fdh (struct bfd_link_info *info,
4334 struct ppc_link_hash_entry *fh)
4335 {
4336 bfd *abfd;
4337 asymbol *newsym;
4338 struct bfd_link_hash_entry *bh;
4339 struct ppc_link_hash_entry *fdh;
4340
4341 abfd = fh->elf.root.u.undef.abfd;
4342 newsym = bfd_make_empty_symbol (abfd);
4343 newsym->name = fh->elf.root.root.string + 1;
4344 newsym->section = bfd_und_section_ptr;
4345 newsym->value = 0;
4346 newsym->flags = BSF_WEAK;
4347
4348 bh = NULL;
4349 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4350 newsym->flags, newsym->section,
4351 newsym->value, NULL, FALSE, FALSE,
4352 &bh))
4353 return NULL;
4354
4355 fdh = (struct ppc_link_hash_entry *) bh;
4356 fdh->elf.non_elf = 0;
4357 fdh->fake = 1;
4358 fdh->is_func_descriptor = 1;
4359 fdh->oh = fh;
4360 fh->is_func = 1;
4361 fh->oh = fdh;
4362 return fdh;
4363 }
4364
4365 /* Fix function descriptor symbols defined in .opd sections to be
4366 function type. */
4367
4368 static bfd_boolean
4369 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4370 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4371 Elf_Internal_Sym *isym,
4372 const char **name ATTRIBUTE_UNUSED,
4373 flagword *flags ATTRIBUTE_UNUSED,
4374 asection **sec,
4375 bfd_vma *value ATTRIBUTE_UNUSED)
4376 {
4377 if (*sec != NULL
4378 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4379 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4380
4381 return TRUE;
4382 }
4383
4384 /* This function makes an old ABI object reference to ".bar" cause the
4385 inclusion of a new ABI object archive that defines "bar".
4386 NAME is a symbol defined in an archive. Return a symbol in the hash
4387 table that might be satisfied by the archive symbols. */
4388
4389 static struct elf_link_hash_entry *
4390 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4391 struct bfd_link_info *info,
4392 const char *name)
4393 {
4394 struct elf_link_hash_entry *h;
4395 char *dot_name;
4396 size_t len;
4397
4398 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4399 if (h != NULL
4400 /* Don't return this sym if it is a fake function descriptor
4401 created by add_symbol_adjust. */
4402 && !(h->root.type == bfd_link_hash_undefweak
4403 && ((struct ppc_link_hash_entry *) h)->fake))
4404 return h;
4405
4406 if (name[0] == '.')
4407 return h;
4408
4409 len = strlen (name);
4410 dot_name = bfd_alloc (abfd, len + 2);
4411 if (dot_name == NULL)
4412 return (struct elf_link_hash_entry *) 0 - 1;
4413 dot_name[0] = '.';
4414 memcpy (dot_name + 1, name, len + 1);
4415 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4416 bfd_release (abfd, dot_name);
4417 return h;
4418 }
4419
4420 /* This function satisfies all old ABI object references to ".bar" if a
4421 new ABI object defines "bar". Well, at least, undefined dot symbols
4422 are made weak. This stops later archive searches from including an
4423 object if we already have a function descriptor definition. It also
4424 prevents the linker complaining about undefined symbols.
4425 We also check and correct mismatched symbol visibility here. The
4426 most restrictive visibility of the function descriptor and the
4427 function entry symbol is used. */
4428
4429 static bfd_boolean
4430 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4431 {
4432 struct ppc_link_hash_table *htab;
4433 struct ppc_link_hash_entry *fdh;
4434
4435 if (eh->elf.root.type == bfd_link_hash_indirect)
4436 return TRUE;
4437
4438 if (eh->elf.root.type == bfd_link_hash_warning)
4439 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4440
4441 if (eh->elf.root.root.string[0] != '.')
4442 abort ();
4443
4444 htab = ppc_hash_table (info);
4445 fdh = get_fdh (eh, htab);
4446 if (fdh == NULL
4447 && !info->relocatable
4448 && (eh->elf.root.type == bfd_link_hash_undefined
4449 || eh->elf.root.type == bfd_link_hash_undefweak)
4450 && eh->elf.ref_regular)
4451 {
4452 /* Make an undefweak function descriptor sym, which is enough to
4453 pull in an --as-needed shared lib, but won't cause link
4454 errors. Archives are handled elsewhere. */
4455 fdh = make_fdh (info, eh);
4456 if (fdh == NULL)
4457 return FALSE;
4458 else
4459 fdh->elf.ref_regular = 1;
4460 }
4461 else if (fdh != NULL)
4462 {
4463 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4464 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4465 if (entry_vis < descr_vis)
4466 fdh->elf.other += entry_vis - descr_vis;
4467 else if (entry_vis > descr_vis)
4468 eh->elf.other += descr_vis - entry_vis;
4469
4470 if ((fdh->elf.root.type == bfd_link_hash_defined
4471 || fdh->elf.root.type == bfd_link_hash_defweak)
4472 && eh->elf.root.type == bfd_link_hash_undefined)
4473 {
4474 eh->elf.root.type = bfd_link_hash_undefweak;
4475 eh->was_undefined = 1;
4476 htab->twiddled_syms = 1;
4477 }
4478 }
4479
4480 return TRUE;
4481 }
4482
4483 /* Process list of dot-symbols we made in link_hash_newfunc. */
4484
4485 static bfd_boolean
4486 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4487 {
4488 struct ppc_link_hash_table *htab;
4489 struct ppc_link_hash_entry **p, *eh;
4490
4491 htab = ppc_hash_table (info);
4492 if (!is_ppc64_elf (info->output_bfd))
4493 return TRUE;
4494
4495 if (is_ppc64_elf (ibfd))
4496 {
4497 p = &htab->dot_syms;
4498 while ((eh = *p) != NULL)
4499 {
4500 *p = NULL;
4501 if (!add_symbol_adjust (eh, info))
4502 return FALSE;
4503 p = &eh->u.next_dot_sym;
4504 }
4505 }
4506
4507 /* Clear the list for non-ppc64 input files. */
4508 p = &htab->dot_syms;
4509 while ((eh = *p) != NULL)
4510 {
4511 *p = NULL;
4512 p = &eh->u.next_dot_sym;
4513 }
4514
4515 /* We need to fix the undefs list for any syms we have twiddled to
4516 undef_weak. */
4517 if (htab->twiddled_syms)
4518 {
4519 bfd_link_repair_undef_list (&htab->elf.root);
4520 htab->twiddled_syms = 0;
4521 }
4522 return TRUE;
4523 }
4524
4525 /* Undo hash table changes when an --as-needed input file is determined
4526 not to be needed. */
4527
4528 static bfd_boolean
4529 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4530 struct bfd_link_info *info)
4531 {
4532 ppc_hash_table (info)->dot_syms = NULL;
4533 return TRUE;
4534 }
4535
4536 static bfd_boolean
4537 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4538 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4539 {
4540 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4541 char *local_got_tls_masks;
4542
4543 if (local_got_ents == NULL)
4544 {
4545 bfd_size_type size = symtab_hdr->sh_info;
4546
4547 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4548 local_got_ents = bfd_zalloc (abfd, size);
4549 if (local_got_ents == NULL)
4550 return FALSE;
4551 elf_local_got_ents (abfd) = local_got_ents;
4552 }
4553
4554 if ((tls_type & TLS_EXPLICIT) == 0)
4555 {
4556 struct got_entry *ent;
4557
4558 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4559 if (ent->addend == r_addend
4560 && ent->owner == abfd
4561 && ent->tls_type == tls_type)
4562 break;
4563 if (ent == NULL)
4564 {
4565 bfd_size_type amt = sizeof (*ent);
4566 ent = bfd_alloc (abfd, amt);
4567 if (ent == NULL)
4568 return FALSE;
4569 ent->next = local_got_ents[r_symndx];
4570 ent->addend = r_addend;
4571 ent->owner = abfd;
4572 ent->tls_type = tls_type;
4573 ent->got.refcount = 0;
4574 local_got_ents[r_symndx] = ent;
4575 }
4576 ent->got.refcount += 1;
4577 }
4578
4579 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4580 local_got_tls_masks[r_symndx] |= tls_type;
4581 return TRUE;
4582 }
4583
4584 static bfd_boolean
4585 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4586 {
4587 struct plt_entry *ent;
4588
4589 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4590 if (ent->addend == addend)
4591 break;
4592 if (ent == NULL)
4593 {
4594 bfd_size_type amt = sizeof (*ent);
4595 ent = bfd_alloc (abfd, amt);
4596 if (ent == NULL)
4597 return FALSE;
4598 ent->next = eh->elf.plt.plist;
4599 ent->addend = addend;
4600 ent->plt.refcount = 0;
4601 eh->elf.plt.plist = ent;
4602 }
4603 ent->plt.refcount += 1;
4604 eh->elf.needs_plt = 1;
4605 if (eh->elf.root.root.string[0] == '.'
4606 && eh->elf.root.root.string[1] != '\0')
4607 eh->is_func = 1;
4608 return TRUE;
4609 }
4610
4611 /* Look through the relocs for a section during the first phase, and
4612 calculate needed space in the global offset table, procedure
4613 linkage table, and dynamic reloc sections. */
4614
4615 static bfd_boolean
4616 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4617 asection *sec, const Elf_Internal_Rela *relocs)
4618 {
4619 struct ppc_link_hash_table *htab;
4620 Elf_Internal_Shdr *symtab_hdr;
4621 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4622 const Elf_Internal_Rela *rel;
4623 const Elf_Internal_Rela *rel_end;
4624 asection *sreloc;
4625 asection **opd_sym_map;
4626 struct elf_link_hash_entry *tga, *dottga;
4627
4628 if (info->relocatable)
4629 return TRUE;
4630
4631 /* Don't do anything special with non-loaded, non-alloced sections.
4632 In particular, any relocs in such sections should not affect GOT
4633 and PLT reference counting (ie. we don't allow them to create GOT
4634 or PLT entries), there's no possibility or desire to optimize TLS
4635 relocs, and there's not much point in propagating relocs to shared
4636 libs that the dynamic linker won't relocate. */
4637 if ((sec->flags & SEC_ALLOC) == 0)
4638 return TRUE;
4639
4640 BFD_ASSERT (is_ppc64_elf (abfd));
4641
4642 htab = ppc_hash_table (info);
4643 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4644 FALSE, FALSE, TRUE);
4645 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4646 FALSE, FALSE, TRUE);
4647 symtab_hdr = &elf_symtab_hdr (abfd);
4648
4649 sym_hashes = elf_sym_hashes (abfd);
4650 sym_hashes_end = (sym_hashes
4651 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4652 - symtab_hdr->sh_info);
4653
4654 sreloc = NULL;
4655 opd_sym_map = NULL;
4656 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4657 {
4658 /* Garbage collection needs some extra help with .opd sections.
4659 We don't want to necessarily keep everything referenced by
4660 relocs in .opd, as that would keep all functions. Instead,
4661 if we reference an .opd symbol (a function descriptor), we
4662 want to keep the function code symbol's section. This is
4663 easy for global symbols, but for local syms we need to keep
4664 information about the associated function section. */
4665 bfd_size_type amt;
4666
4667 amt = sec->size * sizeof (*opd_sym_map) / 8;
4668 opd_sym_map = bfd_zalloc (abfd, amt);
4669 if (opd_sym_map == NULL)
4670 return FALSE;
4671 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4672 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4673 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4674 }
4675
4676 if (htab->sfpr == NULL
4677 && !create_linkage_sections (htab->elf.dynobj, info))
4678 return FALSE;
4679
4680 rel_end = relocs + sec->reloc_count;
4681 for (rel = relocs; rel < rel_end; rel++)
4682 {
4683 unsigned long r_symndx;
4684 struct elf_link_hash_entry *h;
4685 enum elf_ppc64_reloc_type r_type;
4686 int tls_type;
4687 struct _ppc64_elf_section_data *ppc64_sec;
4688
4689 r_symndx = ELF64_R_SYM (rel->r_info);
4690 if (r_symndx < symtab_hdr->sh_info)
4691 h = NULL;
4692 else
4693 {
4694 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4695 while (h->root.type == bfd_link_hash_indirect
4696 || h->root.type == bfd_link_hash_warning)
4697 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4698 }
4699
4700 tls_type = 0;
4701 r_type = ELF64_R_TYPE (rel->r_info);
4702 if (h != NULL && (h == tga || h == dottga))
4703 switch (r_type)
4704 {
4705 default:
4706 break;
4707
4708 case R_PPC64_REL24:
4709 case R_PPC64_REL14:
4710 case R_PPC64_REL14_BRTAKEN:
4711 case R_PPC64_REL14_BRNTAKEN:
4712 case R_PPC64_ADDR24:
4713 case R_PPC64_ADDR14:
4714 case R_PPC64_ADDR14_BRTAKEN:
4715 case R_PPC64_ADDR14_BRNTAKEN:
4716 if (rel != relocs
4717 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4718 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4719 /* We have a new-style __tls_get_addr call with a marker
4720 reloc. */
4721 ;
4722 else
4723 /* Mark this section as having an old-style call. */
4724 sec->has_tls_get_addr_call = 1;
4725 break;
4726 }
4727
4728 switch (r_type)
4729 {
4730 case R_PPC64_TLSGD:
4731 case R_PPC64_TLSLD:
4732 /* These special tls relocs tie a call to __tls_get_addr with
4733 its parameter symbol. */
4734 break;
4735
4736 case R_PPC64_GOT_TLSLD16:
4737 case R_PPC64_GOT_TLSLD16_LO:
4738 case R_PPC64_GOT_TLSLD16_HI:
4739 case R_PPC64_GOT_TLSLD16_HA:
4740 tls_type = TLS_TLS | TLS_LD;
4741 goto dogottls;
4742
4743 case R_PPC64_GOT_TLSGD16:
4744 case R_PPC64_GOT_TLSGD16_LO:
4745 case R_PPC64_GOT_TLSGD16_HI:
4746 case R_PPC64_GOT_TLSGD16_HA:
4747 tls_type = TLS_TLS | TLS_GD;
4748 goto dogottls;
4749
4750 case R_PPC64_GOT_TPREL16_DS:
4751 case R_PPC64_GOT_TPREL16_LO_DS:
4752 case R_PPC64_GOT_TPREL16_HI:
4753 case R_PPC64_GOT_TPREL16_HA:
4754 if (!info->executable)
4755 info->flags |= DF_STATIC_TLS;
4756 tls_type = TLS_TLS | TLS_TPREL;
4757 goto dogottls;
4758
4759 case R_PPC64_GOT_DTPREL16_DS:
4760 case R_PPC64_GOT_DTPREL16_LO_DS:
4761 case R_PPC64_GOT_DTPREL16_HI:
4762 case R_PPC64_GOT_DTPREL16_HA:
4763 tls_type = TLS_TLS | TLS_DTPREL;
4764 dogottls:
4765 sec->has_tls_reloc = 1;
4766 /* Fall thru */
4767
4768 case R_PPC64_GOT16:
4769 case R_PPC64_GOT16_DS:
4770 case R_PPC64_GOT16_HA:
4771 case R_PPC64_GOT16_HI:
4772 case R_PPC64_GOT16_LO:
4773 case R_PPC64_GOT16_LO_DS:
4774 /* This symbol requires a global offset table entry. */
4775 sec->has_toc_reloc = 1;
4776 if (ppc64_elf_tdata (abfd)->got == NULL
4777 && !create_got_section (abfd, info))
4778 return FALSE;
4779
4780 if (h != NULL)
4781 {
4782 struct ppc_link_hash_entry *eh;
4783 struct got_entry *ent;
4784
4785 eh = (struct ppc_link_hash_entry *) h;
4786 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4787 if (ent->addend == rel->r_addend
4788 && ent->owner == abfd
4789 && ent->tls_type == tls_type)
4790 break;
4791 if (ent == NULL)
4792 {
4793 bfd_size_type amt = sizeof (*ent);
4794 ent = bfd_alloc (abfd, amt);
4795 if (ent == NULL)
4796 return FALSE;
4797 ent->next = eh->elf.got.glist;
4798 ent->addend = rel->r_addend;
4799 ent->owner = abfd;
4800 ent->tls_type = tls_type;
4801 ent->got.refcount = 0;
4802 eh->elf.got.glist = ent;
4803 }
4804 ent->got.refcount += 1;
4805 eh->tls_mask |= tls_type;
4806 }
4807 else
4808 /* This is a global offset table entry for a local symbol. */
4809 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4810 rel->r_addend, tls_type))
4811 return FALSE;
4812 break;
4813
4814 case R_PPC64_PLT16_HA:
4815 case R_PPC64_PLT16_HI:
4816 case R_PPC64_PLT16_LO:
4817 case R_PPC64_PLT32:
4818 case R_PPC64_PLT64:
4819 /* This symbol requires a procedure linkage table entry. We
4820 actually build the entry in adjust_dynamic_symbol,
4821 because this might be a case of linking PIC code without
4822 linking in any dynamic objects, in which case we don't
4823 need to generate a procedure linkage table after all. */
4824 if (h == NULL)
4825 {
4826 /* It does not make sense to have a procedure linkage
4827 table entry for a local symbol. */
4828 bfd_set_error (bfd_error_bad_value);
4829 return FALSE;
4830 }
4831 else
4832 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4833 rel->r_addend))
4834 return FALSE;
4835 break;
4836
4837 /* The following relocations don't need to propagate the
4838 relocation if linking a shared object since they are
4839 section relative. */
4840 case R_PPC64_SECTOFF:
4841 case R_PPC64_SECTOFF_LO:
4842 case R_PPC64_SECTOFF_HI:
4843 case R_PPC64_SECTOFF_HA:
4844 case R_PPC64_SECTOFF_DS:
4845 case R_PPC64_SECTOFF_LO_DS:
4846 case R_PPC64_DTPREL16:
4847 case R_PPC64_DTPREL16_LO:
4848 case R_PPC64_DTPREL16_HI:
4849 case R_PPC64_DTPREL16_HA:
4850 case R_PPC64_DTPREL16_DS:
4851 case R_PPC64_DTPREL16_LO_DS:
4852 case R_PPC64_DTPREL16_HIGHER:
4853 case R_PPC64_DTPREL16_HIGHERA:
4854 case R_PPC64_DTPREL16_HIGHEST:
4855 case R_PPC64_DTPREL16_HIGHESTA:
4856 break;
4857
4858 /* Nor do these. */
4859 case R_PPC64_TOC16:
4860 case R_PPC64_TOC16_LO:
4861 case R_PPC64_TOC16_HI:
4862 case R_PPC64_TOC16_HA:
4863 case R_PPC64_TOC16_DS:
4864 case R_PPC64_TOC16_LO_DS:
4865 sec->has_toc_reloc = 1;
4866 break;
4867
4868 /* This relocation describes the C++ object vtable hierarchy.
4869 Reconstruct it for later use during GC. */
4870 case R_PPC64_GNU_VTINHERIT:
4871 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4872 return FALSE;
4873 break;
4874
4875 /* This relocation describes which C++ vtable entries are actually
4876 used. Record for later use during GC. */
4877 case R_PPC64_GNU_VTENTRY:
4878 BFD_ASSERT (h != NULL);
4879 if (h != NULL
4880 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4881 return FALSE;
4882 break;
4883
4884 case R_PPC64_REL14:
4885 case R_PPC64_REL14_BRTAKEN:
4886 case R_PPC64_REL14_BRNTAKEN:
4887 {
4888 asection *dest = NULL;
4889
4890 /* Heuristic: If jumping outside our section, chances are
4891 we are going to need a stub. */
4892 if (h != NULL)
4893 {
4894 /* If the sym is weak it may be overridden later, so
4895 don't assume we know where a weak sym lives. */
4896 if (h->root.type == bfd_link_hash_defined)
4897 dest = h->root.u.def.section;
4898 }
4899 else
4900 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4901 sec, r_symndx);
4902 if (dest != sec)
4903 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4904 }
4905 /* Fall through. */
4906
4907 case R_PPC64_REL24:
4908 if (h != NULL)
4909 {
4910 /* We may need a .plt entry if the function this reloc
4911 refers to is in a shared lib. */
4912 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4913 rel->r_addend))
4914 return FALSE;
4915 if (h == tga || h == dottga)
4916 sec->has_tls_reloc = 1;
4917 }
4918 break;
4919
4920 case R_PPC64_TPREL64:
4921 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4922 if (!info->executable)
4923 info->flags |= DF_STATIC_TLS;
4924 goto dotlstoc;
4925
4926 case R_PPC64_DTPMOD64:
4927 if (rel + 1 < rel_end
4928 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4929 && rel[1].r_offset == rel->r_offset + 8)
4930 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4931 else
4932 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4933 goto dotlstoc;
4934
4935 case R_PPC64_DTPREL64:
4936 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4937 if (rel != relocs
4938 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4939 && rel[-1].r_offset == rel->r_offset - 8)
4940 /* This is the second reloc of a dtpmod, dtprel pair.
4941 Don't mark with TLS_DTPREL. */
4942 goto dodyn;
4943
4944 dotlstoc:
4945 sec->has_tls_reloc = 1;
4946 if (h != NULL)
4947 {
4948 struct ppc_link_hash_entry *eh;
4949 eh = (struct ppc_link_hash_entry *) h;
4950 eh->tls_mask |= tls_type;
4951 }
4952 else
4953 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4954 rel->r_addend, tls_type))
4955 return FALSE;
4956
4957 ppc64_sec = ppc64_elf_section_data (sec);
4958 if (ppc64_sec->sec_type != sec_toc)
4959 {
4960 bfd_size_type amt;
4961
4962 /* One extra to simplify get_tls_mask. */
4963 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
4964 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
4965 if (ppc64_sec->u.toc.symndx == NULL)
4966 return FALSE;
4967 amt = sec->size * sizeof (bfd_vma) / 8;
4968 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
4969 if (ppc64_sec->u.toc.add == NULL)
4970 return FALSE;
4971 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4972 ppc64_sec->sec_type = sec_toc;
4973 }
4974 BFD_ASSERT (rel->r_offset % 8 == 0);
4975 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
4976 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
4977
4978 /* Mark the second slot of a GD or LD entry.
4979 -1 to indicate GD and -2 to indicate LD. */
4980 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4981 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
4982 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4983 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
4984 goto dodyn;
4985
4986 case R_PPC64_TPREL16:
4987 case R_PPC64_TPREL16_LO:
4988 case R_PPC64_TPREL16_HI:
4989 case R_PPC64_TPREL16_HA:
4990 case R_PPC64_TPREL16_DS:
4991 case R_PPC64_TPREL16_LO_DS:
4992 case R_PPC64_TPREL16_HIGHER:
4993 case R_PPC64_TPREL16_HIGHERA:
4994 case R_PPC64_TPREL16_HIGHEST:
4995 case R_PPC64_TPREL16_HIGHESTA:
4996 if (info->shared)
4997 {
4998 if (!info->executable)
4999 info->flags |= DF_STATIC_TLS;
5000 goto dodyn;
5001 }
5002 break;
5003
5004 case R_PPC64_ADDR64:
5005 if (opd_sym_map != NULL
5006 && rel + 1 < rel_end
5007 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5008 {
5009 if (h != NULL)
5010 {
5011 if (h->root.root.string[0] == '.'
5012 && h->root.root.string[1] != 0
5013 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
5014 ;
5015 else
5016 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5017 }
5018 else
5019 {
5020 asection *s;
5021
5022 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
5023 r_symndx);
5024 if (s == NULL)
5025 return FALSE;
5026 else if (s != sec)
5027 opd_sym_map[rel->r_offset / 8] = s;
5028 }
5029 }
5030 /* Fall through. */
5031
5032 case R_PPC64_REL30:
5033 case R_PPC64_REL32:
5034 case R_PPC64_REL64:
5035 case R_PPC64_ADDR14:
5036 case R_PPC64_ADDR14_BRNTAKEN:
5037 case R_PPC64_ADDR14_BRTAKEN:
5038 case R_PPC64_ADDR16:
5039 case R_PPC64_ADDR16_DS:
5040 case R_PPC64_ADDR16_HA:
5041 case R_PPC64_ADDR16_HI:
5042 case R_PPC64_ADDR16_HIGHER:
5043 case R_PPC64_ADDR16_HIGHERA:
5044 case R_PPC64_ADDR16_HIGHEST:
5045 case R_PPC64_ADDR16_HIGHESTA:
5046 case R_PPC64_ADDR16_LO:
5047 case R_PPC64_ADDR16_LO_DS:
5048 case R_PPC64_ADDR24:
5049 case R_PPC64_ADDR32:
5050 case R_PPC64_UADDR16:
5051 case R_PPC64_UADDR32:
5052 case R_PPC64_UADDR64:
5053 case R_PPC64_TOC:
5054 if (h != NULL && !info->shared)
5055 /* We may need a copy reloc. */
5056 h->non_got_ref = 1;
5057
5058 /* Don't propagate .opd relocs. */
5059 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5060 break;
5061
5062 /* If we are creating a shared library, and this is a reloc
5063 against a global symbol, or a non PC relative reloc
5064 against a local symbol, then we need to copy the reloc
5065 into the shared library. However, if we are linking with
5066 -Bsymbolic, we do not need to copy a reloc against a
5067 global symbol which is defined in an object we are
5068 including in the link (i.e., DEF_REGULAR is set). At
5069 this point we have not seen all the input files, so it is
5070 possible that DEF_REGULAR is not set now but will be set
5071 later (it is never cleared). In case of a weak definition,
5072 DEF_REGULAR may be cleared later by a strong definition in
5073 a shared library. We account for that possibility below by
5074 storing information in the dyn_relocs field of the hash
5075 table entry. A similar situation occurs when creating
5076 shared libraries and symbol visibility changes render the
5077 symbol local.
5078
5079 If on the other hand, we are creating an executable, we
5080 may need to keep relocations for symbols satisfied by a
5081 dynamic library if we manage to avoid copy relocs for the
5082 symbol. */
5083 dodyn:
5084 if ((info->shared
5085 && (must_be_dyn_reloc (info, r_type)
5086 || (h != NULL
5087 && (! info->symbolic
5088 || h->root.type == bfd_link_hash_defweak
5089 || !h->def_regular))))
5090 || (ELIMINATE_COPY_RELOCS
5091 && !info->shared
5092 && h != NULL
5093 && (h->root.type == bfd_link_hash_defweak
5094 || !h->def_regular)))
5095 {
5096 struct ppc_dyn_relocs *p;
5097 struct ppc_dyn_relocs **head;
5098
5099 /* We must copy these reloc types into the output file.
5100 Create a reloc section in dynobj and make room for
5101 this reloc. */
5102 if (sreloc == NULL)
5103 {
5104 sreloc = _bfd_elf_make_dynamic_reloc_section
5105 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5106
5107 if (sreloc == NULL)
5108 return FALSE;
5109 }
5110
5111 /* If this is a global symbol, we count the number of
5112 relocations we need for this symbol. */
5113 if (h != NULL)
5114 {
5115 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5116 }
5117 else
5118 {
5119 /* Track dynamic relocs needed for local syms too.
5120 We really need local syms available to do this
5121 easily. Oh well. */
5122
5123 asection *s;
5124 void *vpp;
5125
5126 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
5127 sec, r_symndx);
5128 if (s == NULL)
5129 return FALSE;
5130
5131 vpp = &elf_section_data (s)->local_dynrel;
5132 head = (struct ppc_dyn_relocs **) vpp;
5133 }
5134
5135 p = *head;
5136 if (p == NULL || p->sec != sec)
5137 {
5138 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5139 if (p == NULL)
5140 return FALSE;
5141 p->next = *head;
5142 *head = p;
5143 p->sec = sec;
5144 p->count = 0;
5145 p->pc_count = 0;
5146 }
5147
5148 p->count += 1;
5149 if (!must_be_dyn_reloc (info, r_type))
5150 p->pc_count += 1;
5151 }
5152 break;
5153
5154 default:
5155 break;
5156 }
5157 }
5158
5159 return TRUE;
5160 }
5161
5162 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5163 of the code entry point, and its section. */
5164
5165 static bfd_vma
5166 opd_entry_value (asection *opd_sec,
5167 bfd_vma offset,
5168 asection **code_sec,
5169 bfd_vma *code_off)
5170 {
5171 bfd *opd_bfd = opd_sec->owner;
5172 Elf_Internal_Rela *relocs;
5173 Elf_Internal_Rela *lo, *hi, *look;
5174 bfd_vma val;
5175
5176 /* No relocs implies we are linking a --just-symbols object. */
5177 if (opd_sec->reloc_count == 0)
5178 {
5179 bfd_vma val;
5180
5181 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5182 return (bfd_vma) -1;
5183
5184 if (code_sec != NULL)
5185 {
5186 asection *sec, *likely = NULL;
5187 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5188 if (sec->vma <= val
5189 && (sec->flags & SEC_LOAD) != 0
5190 && (sec->flags & SEC_ALLOC) != 0)
5191 likely = sec;
5192 if (likely != NULL)
5193 {
5194 *code_sec = likely;
5195 if (code_off != NULL)
5196 *code_off = val - likely->vma;
5197 }
5198 }
5199 return val;
5200 }
5201
5202 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5203
5204 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5205 if (relocs == NULL)
5206 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5207
5208 /* Go find the opd reloc at the sym address. */
5209 lo = relocs;
5210 BFD_ASSERT (lo != NULL);
5211 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5212 val = (bfd_vma) -1;
5213 while (lo < hi)
5214 {
5215 look = lo + (hi - lo) / 2;
5216 if (look->r_offset < offset)
5217 lo = look + 1;
5218 else if (look->r_offset > offset)
5219 hi = look;
5220 else
5221 {
5222 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5223
5224 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5225 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5226 {
5227 unsigned long symndx = ELF64_R_SYM (look->r_info);
5228 asection *sec;
5229
5230 if (symndx < symtab_hdr->sh_info)
5231 {
5232 Elf_Internal_Sym *sym;
5233
5234 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5235 if (sym == NULL)
5236 {
5237 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5238 symtab_hdr->sh_info,
5239 0, NULL, NULL, NULL);
5240 if (sym == NULL)
5241 break;
5242 symtab_hdr->contents = (bfd_byte *) sym;
5243 }
5244
5245 sym += symndx;
5246 val = sym->st_value;
5247 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5248 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5249 }
5250 else
5251 {
5252 struct elf_link_hash_entry **sym_hashes;
5253 struct elf_link_hash_entry *rh;
5254
5255 sym_hashes = elf_sym_hashes (opd_bfd);
5256 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5257 while (rh->root.type == bfd_link_hash_indirect
5258 || rh->root.type == bfd_link_hash_warning)
5259 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5260 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5261 || rh->root.type == bfd_link_hash_defweak);
5262 val = rh->root.u.def.value;
5263 sec = rh->root.u.def.section;
5264 }
5265 val += look->r_addend;
5266 if (code_off != NULL)
5267 *code_off = val;
5268 if (code_sec != NULL)
5269 *code_sec = sec;
5270 if (sec != NULL && sec->output_section != NULL)
5271 val += sec->output_section->vma + sec->output_offset;
5272 }
5273 break;
5274 }
5275 }
5276
5277 return val;
5278 }
5279
5280 /* Mark all our entry sym sections, both opd and code section. */
5281
5282 static void
5283 ppc64_elf_gc_keep (struct bfd_link_info *info)
5284 {
5285 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5286 struct bfd_sym_chain *sym;
5287
5288 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5289 {
5290 struct ppc_link_hash_entry *eh;
5291 asection *sec;
5292
5293 eh = (struct ppc_link_hash_entry *)
5294 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5295 if (eh == NULL)
5296 continue;
5297 if (eh->elf.root.type != bfd_link_hash_defined
5298 && eh->elf.root.type != bfd_link_hash_defweak)
5299 continue;
5300
5301 if (eh->is_func_descriptor
5302 && (eh->oh->elf.root.type == bfd_link_hash_defined
5303 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5304 {
5305 sec = eh->oh->elf.root.u.def.section;
5306 sec->flags |= SEC_KEEP;
5307 }
5308 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5309 && opd_entry_value (eh->elf.root.u.def.section,
5310 eh->elf.root.u.def.value,
5311 &sec, NULL) != (bfd_vma) -1)
5312 sec->flags |= SEC_KEEP;
5313
5314 sec = eh->elf.root.u.def.section;
5315 sec->flags |= SEC_KEEP;
5316 }
5317 }
5318
5319 /* Mark sections containing dynamically referenced symbols. When
5320 building shared libraries, we must assume that any visible symbol is
5321 referenced. */
5322
5323 static bfd_boolean
5324 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5325 {
5326 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5327 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5328
5329 if (eh->elf.root.type == bfd_link_hash_warning)
5330 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5331
5332 /* Dynamic linking info is on the func descriptor sym. */
5333 if (eh->oh != NULL
5334 && eh->oh->is_func_descriptor
5335 && (eh->oh->elf.root.type == bfd_link_hash_defined
5336 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5337 eh = eh->oh;
5338
5339 if ((eh->elf.root.type == bfd_link_hash_defined
5340 || eh->elf.root.type == bfd_link_hash_defweak)
5341 && (eh->elf.ref_dynamic
5342 || (!info->executable
5343 && eh->elf.def_regular
5344 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5345 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5346 {
5347 asection *code_sec;
5348
5349 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5350
5351 /* Function descriptor syms cause the associated
5352 function code sym section to be marked. */
5353 if (eh->is_func_descriptor
5354 && (eh->oh->elf.root.type == bfd_link_hash_defined
5355 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5356 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5357 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5358 && opd_entry_value (eh->elf.root.u.def.section,
5359 eh->elf.root.u.def.value,
5360 &code_sec, NULL) != (bfd_vma) -1)
5361 code_sec->flags |= SEC_KEEP;
5362 }
5363
5364 return TRUE;
5365 }
5366
5367 /* Return the section that should be marked against GC for a given
5368 relocation. */
5369
5370 static asection *
5371 ppc64_elf_gc_mark_hook (asection *sec,
5372 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5373 Elf_Internal_Rela *rel,
5374 struct elf_link_hash_entry *h,
5375 Elf_Internal_Sym *sym)
5376 {
5377 asection *rsec;
5378
5379 /* Syms return NULL if we're marking .opd, so we avoid marking all
5380 function sections, as all functions are referenced in .opd. */
5381 rsec = NULL;
5382 if (get_opd_info (sec) != NULL)
5383 return rsec;
5384
5385 if (h != NULL)
5386 {
5387 enum elf_ppc64_reloc_type r_type;
5388 struct ppc_link_hash_entry *eh;
5389
5390 r_type = ELF64_R_TYPE (rel->r_info);
5391 switch (r_type)
5392 {
5393 case R_PPC64_GNU_VTINHERIT:
5394 case R_PPC64_GNU_VTENTRY:
5395 break;
5396
5397 default:
5398 switch (h->root.type)
5399 {
5400 case bfd_link_hash_defined:
5401 case bfd_link_hash_defweak:
5402 eh = (struct ppc_link_hash_entry *) h;
5403 if (eh->oh != NULL
5404 && eh->oh->is_func_descriptor
5405 && (eh->oh->elf.root.type == bfd_link_hash_defined
5406 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5407 eh = eh->oh;
5408
5409 /* Function descriptor syms cause the associated
5410 function code sym section to be marked. */
5411 if (eh->is_func_descriptor
5412 && (eh->oh->elf.root.type == bfd_link_hash_defined
5413 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5414 {
5415 /* They also mark their opd section. */
5416 eh->elf.root.u.def.section->gc_mark = 1;
5417
5418 rsec = eh->oh->elf.root.u.def.section;
5419 }
5420 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5421 && opd_entry_value (eh->elf.root.u.def.section,
5422 eh->elf.root.u.def.value,
5423 &rsec, NULL) != (bfd_vma) -1)
5424 eh->elf.root.u.def.section->gc_mark = 1;
5425 else
5426 rsec = h->root.u.def.section;
5427 break;
5428
5429 case bfd_link_hash_common:
5430 rsec = h->root.u.c.p->section;
5431 break;
5432
5433 default:
5434 break;
5435 }
5436 }
5437 }
5438 else
5439 {
5440 struct _opd_sec_data *opd;
5441
5442 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5443 opd = get_opd_info (rsec);
5444 if (opd != NULL && opd->func_sec != NULL)
5445 {
5446 rsec->gc_mark = 1;
5447
5448 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5449 }
5450 }
5451
5452 return rsec;
5453 }
5454
5455 /* Update the .got, .plt. and dynamic reloc reference counts for the
5456 section being removed. */
5457
5458 static bfd_boolean
5459 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5460 asection *sec, const Elf_Internal_Rela *relocs)
5461 {
5462 struct ppc_link_hash_table *htab;
5463 Elf_Internal_Shdr *symtab_hdr;
5464 struct elf_link_hash_entry **sym_hashes;
5465 struct got_entry **local_got_ents;
5466 const Elf_Internal_Rela *rel, *relend;
5467
5468 if (info->relocatable)
5469 return TRUE;
5470
5471 if ((sec->flags & SEC_ALLOC) == 0)
5472 return TRUE;
5473
5474 elf_section_data (sec)->local_dynrel = NULL;
5475
5476 htab = ppc_hash_table (info);
5477 symtab_hdr = &elf_symtab_hdr (abfd);
5478 sym_hashes = elf_sym_hashes (abfd);
5479 local_got_ents = elf_local_got_ents (abfd);
5480
5481 relend = relocs + sec->reloc_count;
5482 for (rel = relocs; rel < relend; rel++)
5483 {
5484 unsigned long r_symndx;
5485 enum elf_ppc64_reloc_type r_type;
5486 struct elf_link_hash_entry *h = NULL;
5487 char tls_type = 0;
5488
5489 r_symndx = ELF64_R_SYM (rel->r_info);
5490 r_type = ELF64_R_TYPE (rel->r_info);
5491 if (r_symndx >= symtab_hdr->sh_info)
5492 {
5493 struct ppc_link_hash_entry *eh;
5494 struct ppc_dyn_relocs **pp;
5495 struct ppc_dyn_relocs *p;
5496
5497 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5498 while (h->root.type == bfd_link_hash_indirect
5499 || h->root.type == bfd_link_hash_warning)
5500 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5501 eh = (struct ppc_link_hash_entry *) h;
5502
5503 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5504 if (p->sec == sec)
5505 {
5506 /* Everything must go for SEC. */
5507 *pp = p->next;
5508 break;
5509 }
5510 }
5511
5512 switch (r_type)
5513 {
5514 case R_PPC64_GOT_TLSLD16:
5515 case R_PPC64_GOT_TLSLD16_LO:
5516 case R_PPC64_GOT_TLSLD16_HI:
5517 case R_PPC64_GOT_TLSLD16_HA:
5518 tls_type = TLS_TLS | TLS_LD;
5519 goto dogot;
5520
5521 case R_PPC64_GOT_TLSGD16:
5522 case R_PPC64_GOT_TLSGD16_LO:
5523 case R_PPC64_GOT_TLSGD16_HI:
5524 case R_PPC64_GOT_TLSGD16_HA:
5525 tls_type = TLS_TLS | TLS_GD;
5526 goto dogot;
5527
5528 case R_PPC64_GOT_TPREL16_DS:
5529 case R_PPC64_GOT_TPREL16_LO_DS:
5530 case R_PPC64_GOT_TPREL16_HI:
5531 case R_PPC64_GOT_TPREL16_HA:
5532 tls_type = TLS_TLS | TLS_TPREL;
5533 goto dogot;
5534
5535 case R_PPC64_GOT_DTPREL16_DS:
5536 case R_PPC64_GOT_DTPREL16_LO_DS:
5537 case R_PPC64_GOT_DTPREL16_HI:
5538 case R_PPC64_GOT_DTPREL16_HA:
5539 tls_type = TLS_TLS | TLS_DTPREL;
5540 goto dogot;
5541
5542 case R_PPC64_GOT16:
5543 case R_PPC64_GOT16_DS:
5544 case R_PPC64_GOT16_HA:
5545 case R_PPC64_GOT16_HI:
5546 case R_PPC64_GOT16_LO:
5547 case R_PPC64_GOT16_LO_DS:
5548 dogot:
5549 {
5550 struct got_entry *ent;
5551
5552 if (h != NULL)
5553 ent = h->got.glist;
5554 else
5555 ent = local_got_ents[r_symndx];
5556
5557 for (; ent != NULL; ent = ent->next)
5558 if (ent->addend == rel->r_addend
5559 && ent->owner == abfd
5560 && ent->tls_type == tls_type)
5561 break;
5562 if (ent == NULL)
5563 abort ();
5564 if (ent->got.refcount > 0)
5565 ent->got.refcount -= 1;
5566 }
5567 break;
5568
5569 case R_PPC64_PLT16_HA:
5570 case R_PPC64_PLT16_HI:
5571 case R_PPC64_PLT16_LO:
5572 case R_PPC64_PLT32:
5573 case R_PPC64_PLT64:
5574 case R_PPC64_REL14:
5575 case R_PPC64_REL14_BRNTAKEN:
5576 case R_PPC64_REL14_BRTAKEN:
5577 case R_PPC64_REL24:
5578 if (h != NULL)
5579 {
5580 struct plt_entry *ent;
5581
5582 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5583 if (ent->addend == rel->r_addend)
5584 break;
5585 if (ent == NULL)
5586 abort ();
5587 if (ent->plt.refcount > 0)
5588 ent->plt.refcount -= 1;
5589 }
5590 break;
5591
5592 default:
5593 break;
5594 }
5595 }
5596 return TRUE;
5597 }
5598
5599 /* The maximum size of .sfpr. */
5600 #define SFPR_MAX (218*4)
5601
5602 struct sfpr_def_parms
5603 {
5604 const char name[12];
5605 unsigned char lo, hi;
5606 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5607 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5608 };
5609
5610 /* Auto-generate _save*, _rest* functions in .sfpr. */
5611
5612 static unsigned int
5613 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5614 {
5615 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5616 unsigned int i;
5617 size_t len = strlen (parm->name);
5618 bfd_boolean writing = FALSE;
5619 char sym[16];
5620
5621 memcpy (sym, parm->name, len);
5622 sym[len + 2] = 0;
5623
5624 for (i = parm->lo; i <= parm->hi; i++)
5625 {
5626 struct elf_link_hash_entry *h;
5627
5628 sym[len + 0] = i / 10 + '0';
5629 sym[len + 1] = i % 10 + '0';
5630 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5631 if (h != NULL
5632 && !h->def_regular)
5633 {
5634 h->root.type = bfd_link_hash_defined;
5635 h->root.u.def.section = htab->sfpr;
5636 h->root.u.def.value = htab->sfpr->size;
5637 h->type = STT_FUNC;
5638 h->def_regular = 1;
5639 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5640 writing = TRUE;
5641 if (htab->sfpr->contents == NULL)
5642 {
5643 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5644 if (htab->sfpr->contents == NULL)
5645 return FALSE;
5646 }
5647 }
5648 if (writing)
5649 {
5650 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5651 if (i != parm->hi)
5652 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5653 else
5654 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5655 htab->sfpr->size = p - htab->sfpr->contents;
5656 }
5657 }
5658
5659 return TRUE;
5660 }
5661
5662 static bfd_byte *
5663 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5664 {
5665 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5666 return p + 4;
5667 }
5668
5669 static bfd_byte *
5670 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5671 {
5672 p = savegpr0 (abfd, p, r);
5673 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5674 p = p + 4;
5675 bfd_put_32 (abfd, BLR, p);
5676 return p + 4;
5677 }
5678
5679 static bfd_byte *
5680 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5681 {
5682 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5683 return p + 4;
5684 }
5685
5686 static bfd_byte *
5687 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5688 {
5689 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5690 p = p + 4;
5691 p = restgpr0 (abfd, p, r);
5692 bfd_put_32 (abfd, MTLR_R0, p);
5693 p = p + 4;
5694 if (r == 29)
5695 {
5696 p = restgpr0 (abfd, p, 30);
5697 p = restgpr0 (abfd, p, 31);
5698 }
5699 bfd_put_32 (abfd, BLR, p);
5700 return p + 4;
5701 }
5702
5703 static bfd_byte *
5704 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5705 {
5706 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5707 return p + 4;
5708 }
5709
5710 static bfd_byte *
5711 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5712 {
5713 p = savegpr1 (abfd, p, r);
5714 bfd_put_32 (abfd, BLR, p);
5715 return p + 4;
5716 }
5717
5718 static bfd_byte *
5719 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5720 {
5721 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5722 return p + 4;
5723 }
5724
5725 static bfd_byte *
5726 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5727 {
5728 p = restgpr1 (abfd, p, r);
5729 bfd_put_32 (abfd, BLR, p);
5730 return p + 4;
5731 }
5732
5733 static bfd_byte *
5734 savefpr (bfd *abfd, bfd_byte *p, int r)
5735 {
5736 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5737 return p + 4;
5738 }
5739
5740 static bfd_byte *
5741 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5742 {
5743 p = savefpr (abfd, p, r);
5744 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5745 p = p + 4;
5746 bfd_put_32 (abfd, BLR, p);
5747 return p + 4;
5748 }
5749
5750 static bfd_byte *
5751 restfpr (bfd *abfd, bfd_byte *p, int r)
5752 {
5753 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5754 return p + 4;
5755 }
5756
5757 static bfd_byte *
5758 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5759 {
5760 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5761 p = p + 4;
5762 p = restfpr (abfd, p, r);
5763 bfd_put_32 (abfd, MTLR_R0, p);
5764 p = p + 4;
5765 if (r == 29)
5766 {
5767 p = restfpr (abfd, p, 30);
5768 p = restfpr (abfd, p, 31);
5769 }
5770 bfd_put_32 (abfd, BLR, p);
5771 return p + 4;
5772 }
5773
5774 static bfd_byte *
5775 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5776 {
5777 p = savefpr (abfd, p, r);
5778 bfd_put_32 (abfd, BLR, p);
5779 return p + 4;
5780 }
5781
5782 static bfd_byte *
5783 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5784 {
5785 p = restfpr (abfd, p, r);
5786 bfd_put_32 (abfd, BLR, p);
5787 return p + 4;
5788 }
5789
5790 static bfd_byte *
5791 savevr (bfd *abfd, bfd_byte *p, int r)
5792 {
5793 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5794 p = p + 4;
5795 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5796 return p + 4;
5797 }
5798
5799 static bfd_byte *
5800 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5801 {
5802 p = savevr (abfd, p, r);
5803 bfd_put_32 (abfd, BLR, p);
5804 return p + 4;
5805 }
5806
5807 static bfd_byte *
5808 restvr (bfd *abfd, bfd_byte *p, int r)
5809 {
5810 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5811 p = p + 4;
5812 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5813 return p + 4;
5814 }
5815
5816 static bfd_byte *
5817 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5818 {
5819 p = restvr (abfd, p, r);
5820 bfd_put_32 (abfd, BLR, p);
5821 return p + 4;
5822 }
5823
5824 /* Called via elf_link_hash_traverse to transfer dynamic linking
5825 information on function code symbol entries to their corresponding
5826 function descriptor symbol entries. */
5827
5828 static bfd_boolean
5829 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5830 {
5831 struct bfd_link_info *info;
5832 struct ppc_link_hash_table *htab;
5833 struct plt_entry *ent;
5834 struct ppc_link_hash_entry *fh;
5835 struct ppc_link_hash_entry *fdh;
5836 bfd_boolean force_local;
5837
5838 fh = (struct ppc_link_hash_entry *) h;
5839 if (fh->elf.root.type == bfd_link_hash_indirect)
5840 return TRUE;
5841
5842 if (fh->elf.root.type == bfd_link_hash_warning)
5843 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5844
5845 info = inf;
5846 htab = ppc_hash_table (info);
5847
5848 /* Resolve undefined references to dot-symbols as the value
5849 in the function descriptor, if we have one in a regular object.
5850 This is to satisfy cases like ".quad .foo". Calls to functions
5851 in dynamic objects are handled elsewhere. */
5852 if (fh->elf.root.type == bfd_link_hash_undefweak
5853 && fh->was_undefined
5854 && (fh->oh->elf.root.type == bfd_link_hash_defined
5855 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5856 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5857 && opd_entry_value (fh->oh->elf.root.u.def.section,
5858 fh->oh->elf.root.u.def.value,
5859 &fh->elf.root.u.def.section,
5860 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5861 {
5862 fh->elf.root.type = fh->oh->elf.root.type;
5863 fh->elf.forced_local = 1;
5864 fh->elf.def_regular = fh->oh->elf.def_regular;
5865 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5866 }
5867
5868 /* If this is a function code symbol, transfer dynamic linking
5869 information to the function descriptor symbol. */
5870 if (!fh->is_func)
5871 return TRUE;
5872
5873 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5874 if (ent->plt.refcount > 0)
5875 break;
5876 if (ent == NULL
5877 || fh->elf.root.root.string[0] != '.'
5878 || fh->elf.root.root.string[1] == '\0')
5879 return TRUE;
5880
5881 /* Find the corresponding function descriptor symbol. Create it
5882 as undefined if necessary. */
5883
5884 fdh = get_fdh (fh, htab);
5885 if (fdh != NULL)
5886 while (fdh->elf.root.type == bfd_link_hash_indirect
5887 || fdh->elf.root.type == bfd_link_hash_warning)
5888 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5889
5890 if (fdh == NULL
5891 && !info->executable
5892 && (fh->elf.root.type == bfd_link_hash_undefined
5893 || fh->elf.root.type == bfd_link_hash_undefweak))
5894 {
5895 fdh = make_fdh (info, fh);
5896 if (fdh == NULL)
5897 return FALSE;
5898 }
5899
5900 /* Fake function descriptors are made undefweak. If the function
5901 code symbol is strong undefined, make the fake sym the same.
5902 If the function code symbol is defined, then force the fake
5903 descriptor local; We can't support overriding of symbols in a
5904 shared library on a fake descriptor. */
5905
5906 if (fdh != NULL
5907 && fdh->fake
5908 && fdh->elf.root.type == bfd_link_hash_undefweak)
5909 {
5910 if (fh->elf.root.type == bfd_link_hash_undefined)
5911 {
5912 fdh->elf.root.type = bfd_link_hash_undefined;
5913 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5914 }
5915 else if (fh->elf.root.type == bfd_link_hash_defined
5916 || fh->elf.root.type == bfd_link_hash_defweak)
5917 {
5918 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5919 }
5920 }
5921
5922 if (fdh != NULL
5923 && !fdh->elf.forced_local
5924 && (!info->executable
5925 || fdh->elf.def_dynamic
5926 || fdh->elf.ref_dynamic
5927 || (fdh->elf.root.type == bfd_link_hash_undefweak
5928 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5929 {
5930 if (fdh->elf.dynindx == -1)
5931 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5932 return FALSE;
5933 fdh->elf.ref_regular |= fh->elf.ref_regular;
5934 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5935 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5936 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5937 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5938 {
5939 move_plt_plist (fh, fdh);
5940 fdh->elf.needs_plt = 1;
5941 }
5942 fdh->is_func_descriptor = 1;
5943 fdh->oh = fh;
5944 fh->oh = fdh;
5945 }
5946
5947 /* Now that the info is on the function descriptor, clear the
5948 function code sym info. Any function code syms for which we
5949 don't have a definition in a regular file, we force local.
5950 This prevents a shared library from exporting syms that have
5951 been imported from another library. Function code syms that
5952 are really in the library we must leave global to prevent the
5953 linker dragging in a definition from a static library. */
5954 force_local = (!fh->elf.def_regular
5955 || fdh == NULL
5956 || !fdh->elf.def_regular
5957 || fdh->elf.forced_local);
5958 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5959
5960 return TRUE;
5961 }
5962
5963 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5964 this hook to a) provide some gcc support functions, and b) transfer
5965 dynamic linking information gathered so far on function code symbol
5966 entries, to their corresponding function descriptor symbol entries. */
5967
5968 static bfd_boolean
5969 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5970 struct bfd_link_info *info)
5971 {
5972 struct ppc_link_hash_table *htab;
5973 unsigned int i;
5974 const struct sfpr_def_parms funcs[] =
5975 {
5976 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5977 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5978 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5979 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5980 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5981 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5982 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5983 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5984 { "._savef", 14, 31, savefpr, savefpr1_tail },
5985 { "._restf", 14, 31, restfpr, restfpr1_tail },
5986 { "_savevr_", 20, 31, savevr, savevr_tail },
5987 { "_restvr_", 20, 31, restvr, restvr_tail }
5988 };
5989
5990 htab = ppc_hash_table (info);
5991 if (htab->sfpr == NULL)
5992 /* We don't have any relocs. */
5993 return TRUE;
5994
5995 /* Provide any missing _save* and _rest* functions. */
5996 htab->sfpr->size = 0;
5997 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5998 if (!sfpr_define (info, &funcs[i]))
5999 return FALSE;
6000
6001 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6002
6003 if (htab->sfpr->size == 0)
6004 htab->sfpr->flags |= SEC_EXCLUDE;
6005
6006 return TRUE;
6007 }
6008
6009 /* Adjust a symbol defined by a dynamic object and referenced by a
6010 regular object. The current definition is in some section of the
6011 dynamic object, but we're not including those sections. We have to
6012 change the definition to something the rest of the link can
6013 understand. */
6014
6015 static bfd_boolean
6016 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6017 struct elf_link_hash_entry *h)
6018 {
6019 struct ppc_link_hash_table *htab;
6020 asection *s;
6021
6022 htab = ppc_hash_table (info);
6023
6024 /* Deal with function syms. */
6025 if (h->type == STT_FUNC
6026 || h->needs_plt)
6027 {
6028 /* Clear procedure linkage table information for any symbol that
6029 won't need a .plt entry. */
6030 struct plt_entry *ent;
6031 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6032 if (ent->plt.refcount > 0)
6033 break;
6034 if (ent == NULL
6035 || SYMBOL_CALLS_LOCAL (info, h)
6036 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6037 && h->root.type == bfd_link_hash_undefweak))
6038 {
6039 h->plt.plist = NULL;
6040 h->needs_plt = 0;
6041 }
6042 }
6043 else
6044 h->plt.plist = NULL;
6045
6046 /* If this is a weak symbol, and there is a real definition, the
6047 processor independent code will have arranged for us to see the
6048 real definition first, and we can just use the same value. */
6049 if (h->u.weakdef != NULL)
6050 {
6051 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6052 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6053 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6054 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6055 if (ELIMINATE_COPY_RELOCS)
6056 h->non_got_ref = h->u.weakdef->non_got_ref;
6057 return TRUE;
6058 }
6059
6060 /* If we are creating a shared library, we must presume that the
6061 only references to the symbol are via the global offset table.
6062 For such cases we need not do anything here; the relocations will
6063 be handled correctly by relocate_section. */
6064 if (info->shared)
6065 return TRUE;
6066
6067 /* If there are no references to this symbol that do not use the
6068 GOT, we don't need to generate a copy reloc. */
6069 if (!h->non_got_ref)
6070 return TRUE;
6071
6072 /* Don't generate a copy reloc for symbols defined in the executable. */
6073 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6074 return TRUE;
6075
6076 if (ELIMINATE_COPY_RELOCS)
6077 {
6078 struct ppc_link_hash_entry * eh;
6079 struct ppc_dyn_relocs *p;
6080
6081 eh = (struct ppc_link_hash_entry *) h;
6082 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6083 {
6084 s = p->sec->output_section;
6085 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6086 break;
6087 }
6088
6089 /* If we didn't find any dynamic relocs in read-only sections, then
6090 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6091 if (p == NULL)
6092 {
6093 h->non_got_ref = 0;
6094 return TRUE;
6095 }
6096 }
6097
6098 if (h->plt.plist != NULL)
6099 {
6100 /* We should never get here, but unfortunately there are versions
6101 of gcc out there that improperly (for this ABI) put initialized
6102 function pointers, vtable refs and suchlike in read-only
6103 sections. Allow them to proceed, but warn that this might
6104 break at runtime. */
6105 (*_bfd_error_handler)
6106 (_("copy reloc against `%s' requires lazy plt linking; "
6107 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6108 h->root.root.string);
6109 }
6110
6111 /* This is a reference to a symbol defined by a dynamic object which
6112 is not a function. */
6113
6114 if (h->size == 0)
6115 {
6116 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6117 h->root.root.string);
6118 return TRUE;
6119 }
6120
6121 /* We must allocate the symbol in our .dynbss section, which will
6122 become part of the .bss section of the executable. There will be
6123 an entry for this symbol in the .dynsym section. The dynamic
6124 object will contain position independent code, so all references
6125 from the dynamic object to this symbol will go through the global
6126 offset table. The dynamic linker will use the .dynsym entry to
6127 determine the address it must put in the global offset table, so
6128 both the dynamic object and the regular object will refer to the
6129 same memory location for the variable. */
6130
6131 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6132 to copy the initial value out of the dynamic object and into the
6133 runtime process image. We need to remember the offset into the
6134 .rela.bss section we are going to use. */
6135 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6136 {
6137 htab->relbss->size += sizeof (Elf64_External_Rela);
6138 h->needs_copy = 1;
6139 }
6140
6141 s = htab->dynbss;
6142
6143 return _bfd_elf_adjust_dynamic_copy (h, s);
6144 }
6145
6146 /* If given a function descriptor symbol, hide both the function code
6147 sym and the descriptor. */
6148 static void
6149 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6150 struct elf_link_hash_entry *h,
6151 bfd_boolean force_local)
6152 {
6153 struct ppc_link_hash_entry *eh;
6154 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6155
6156 eh = (struct ppc_link_hash_entry *) h;
6157 if (eh->is_func_descriptor)
6158 {
6159 struct ppc_link_hash_entry *fh = eh->oh;
6160
6161 if (fh == NULL)
6162 {
6163 const char *p, *q;
6164 struct ppc_link_hash_table *htab;
6165 char save;
6166
6167 /* We aren't supposed to use alloca in BFD because on
6168 systems which do not have alloca the version in libiberty
6169 calls xmalloc, which might cause the program to crash
6170 when it runs out of memory. This function doesn't have a
6171 return status, so there's no way to gracefully return an
6172 error. So cheat. We know that string[-1] can be safely
6173 accessed; It's either a string in an ELF string table,
6174 or allocated in an objalloc structure. */
6175
6176 p = eh->elf.root.root.string - 1;
6177 save = *p;
6178 *(char *) p = '.';
6179 htab = ppc_hash_table (info);
6180 fh = (struct ppc_link_hash_entry *)
6181 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6182 *(char *) p = save;
6183
6184 /* Unfortunately, if it so happens that the string we were
6185 looking for was allocated immediately before this string,
6186 then we overwrote the string terminator. That's the only
6187 reason the lookup should fail. */
6188 if (fh == NULL)
6189 {
6190 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6191 while (q >= eh->elf.root.root.string && *q == *p)
6192 --q, --p;
6193 if (q < eh->elf.root.root.string && *p == '.')
6194 fh = (struct ppc_link_hash_entry *)
6195 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6196 }
6197 if (fh != NULL)
6198 {
6199 eh->oh = fh;
6200 fh->oh = eh;
6201 }
6202 }
6203 if (fh != NULL)
6204 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6205 }
6206 }
6207
6208 static bfd_boolean
6209 get_sym_h (struct elf_link_hash_entry **hp,
6210 Elf_Internal_Sym **symp,
6211 asection **symsecp,
6212 char **tls_maskp,
6213 Elf_Internal_Sym **locsymsp,
6214 unsigned long r_symndx,
6215 bfd *ibfd)
6216 {
6217 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6218
6219 if (r_symndx >= symtab_hdr->sh_info)
6220 {
6221 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6222 struct elf_link_hash_entry *h;
6223
6224 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6225 while (h->root.type == bfd_link_hash_indirect
6226 || h->root.type == bfd_link_hash_warning)
6227 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6228
6229 if (hp != NULL)
6230 *hp = h;
6231
6232 if (symp != NULL)
6233 *symp = NULL;
6234
6235 if (symsecp != NULL)
6236 {
6237 asection *symsec = NULL;
6238 if (h->root.type == bfd_link_hash_defined
6239 || h->root.type == bfd_link_hash_defweak)
6240 symsec = h->root.u.def.section;
6241 *symsecp = symsec;
6242 }
6243
6244 if (tls_maskp != NULL)
6245 {
6246 struct ppc_link_hash_entry *eh;
6247
6248 eh = (struct ppc_link_hash_entry *) h;
6249 *tls_maskp = &eh->tls_mask;
6250 }
6251 }
6252 else
6253 {
6254 Elf_Internal_Sym *sym;
6255 Elf_Internal_Sym *locsyms = *locsymsp;
6256
6257 if (locsyms == NULL)
6258 {
6259 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6260 if (locsyms == NULL)
6261 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6262 symtab_hdr->sh_info,
6263 0, NULL, NULL, NULL);
6264 if (locsyms == NULL)
6265 return FALSE;
6266 *locsymsp = locsyms;
6267 }
6268 sym = locsyms + r_symndx;
6269
6270 if (hp != NULL)
6271 *hp = NULL;
6272
6273 if (symp != NULL)
6274 *symp = sym;
6275
6276 if (symsecp != NULL)
6277 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6278
6279 if (tls_maskp != NULL)
6280 {
6281 struct got_entry **lgot_ents;
6282 char *tls_mask;
6283
6284 tls_mask = NULL;
6285 lgot_ents = elf_local_got_ents (ibfd);
6286 if (lgot_ents != NULL)
6287 {
6288 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6289 tls_mask = &lgot_masks[r_symndx];
6290 }
6291 *tls_maskp = tls_mask;
6292 }
6293 }
6294 return TRUE;
6295 }
6296
6297 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6298 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6299 type suitable for optimization, and 1 otherwise. */
6300
6301 static int
6302 get_tls_mask (char **tls_maskp,
6303 unsigned long *toc_symndx,
6304 bfd_vma *toc_addend,
6305 Elf_Internal_Sym **locsymsp,
6306 const Elf_Internal_Rela *rel,
6307 bfd *ibfd)
6308 {
6309 unsigned long r_symndx;
6310 int next_r;
6311 struct elf_link_hash_entry *h;
6312 Elf_Internal_Sym *sym;
6313 asection *sec;
6314 bfd_vma off;
6315
6316 r_symndx = ELF64_R_SYM (rel->r_info);
6317 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6318 return 0;
6319
6320 if ((*tls_maskp != NULL && **tls_maskp != 0)
6321 || sec == NULL
6322 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6323 return 1;
6324
6325 /* Look inside a TOC section too. */
6326 if (h != NULL)
6327 {
6328 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6329 off = h->root.u.def.value;
6330 }
6331 else
6332 off = sym->st_value;
6333 off += rel->r_addend;
6334 BFD_ASSERT (off % 8 == 0);
6335 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6336 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6337 if (toc_symndx != NULL)
6338 *toc_symndx = r_symndx;
6339 if (toc_addend != NULL)
6340 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6341 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6342 return 0;
6343 if ((h == NULL
6344 || ((h->root.type == bfd_link_hash_defined
6345 || h->root.type == bfd_link_hash_defweak)
6346 && !h->def_dynamic))
6347 && (next_r == -1 || next_r == -2))
6348 return 1 - next_r;
6349 return 1;
6350 }
6351
6352 /* Adjust all global syms defined in opd sections. In gcc generated
6353 code for the old ABI, these will already have been done. */
6354
6355 static bfd_boolean
6356 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6357 {
6358 struct ppc_link_hash_entry *eh;
6359 asection *sym_sec;
6360 struct _opd_sec_data *opd;
6361
6362 if (h->root.type == bfd_link_hash_indirect)
6363 return TRUE;
6364
6365 if (h->root.type == bfd_link_hash_warning)
6366 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6367
6368 if (h->root.type != bfd_link_hash_defined
6369 && h->root.type != bfd_link_hash_defweak)
6370 return TRUE;
6371
6372 eh = (struct ppc_link_hash_entry *) h;
6373 if (eh->adjust_done)
6374 return TRUE;
6375
6376 sym_sec = eh->elf.root.u.def.section;
6377 opd = get_opd_info (sym_sec);
6378 if (opd != NULL && opd->adjust != NULL)
6379 {
6380 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6381 if (adjust == -1)
6382 {
6383 /* This entry has been deleted. */
6384 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6385 if (dsec == NULL)
6386 {
6387 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6388 if (elf_discarded_section (dsec))
6389 {
6390 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6391 break;
6392 }
6393 }
6394 eh->elf.root.u.def.value = 0;
6395 eh->elf.root.u.def.section = dsec;
6396 }
6397 else
6398 eh->elf.root.u.def.value += adjust;
6399 eh->adjust_done = 1;
6400 }
6401 return TRUE;
6402 }
6403
6404 /* Handles decrementing dynamic reloc counts for the reloc specified by
6405 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6406 have already been determined. */
6407
6408 static bfd_boolean
6409 dec_dynrel_count (bfd_vma r_info,
6410 asection *sec,
6411 struct bfd_link_info *info,
6412 Elf_Internal_Sym **local_syms,
6413 struct elf_link_hash_entry *h,
6414 asection *sym_sec)
6415 {
6416 enum elf_ppc64_reloc_type r_type;
6417 struct ppc_dyn_relocs *p;
6418 struct ppc_dyn_relocs **pp;
6419
6420 /* Can this reloc be dynamic? This switch, and later tests here
6421 should be kept in sync with the code in check_relocs. */
6422 r_type = ELF64_R_TYPE (r_info);
6423 switch (r_type)
6424 {
6425 default:
6426 return TRUE;
6427
6428 case R_PPC64_TPREL16:
6429 case R_PPC64_TPREL16_LO:
6430 case R_PPC64_TPREL16_HI:
6431 case R_PPC64_TPREL16_HA:
6432 case R_PPC64_TPREL16_DS:
6433 case R_PPC64_TPREL16_LO_DS:
6434 case R_PPC64_TPREL16_HIGHER:
6435 case R_PPC64_TPREL16_HIGHERA:
6436 case R_PPC64_TPREL16_HIGHEST:
6437 case R_PPC64_TPREL16_HIGHESTA:
6438 if (!info->shared)
6439 return TRUE;
6440
6441 case R_PPC64_TPREL64:
6442 case R_PPC64_DTPMOD64:
6443 case R_PPC64_DTPREL64:
6444 case R_PPC64_ADDR64:
6445 case R_PPC64_REL30:
6446 case R_PPC64_REL32:
6447 case R_PPC64_REL64:
6448 case R_PPC64_ADDR14:
6449 case R_PPC64_ADDR14_BRNTAKEN:
6450 case R_PPC64_ADDR14_BRTAKEN:
6451 case R_PPC64_ADDR16:
6452 case R_PPC64_ADDR16_DS:
6453 case R_PPC64_ADDR16_HA:
6454 case R_PPC64_ADDR16_HI:
6455 case R_PPC64_ADDR16_HIGHER:
6456 case R_PPC64_ADDR16_HIGHERA:
6457 case R_PPC64_ADDR16_HIGHEST:
6458 case R_PPC64_ADDR16_HIGHESTA:
6459 case R_PPC64_ADDR16_LO:
6460 case R_PPC64_ADDR16_LO_DS:
6461 case R_PPC64_ADDR24:
6462 case R_PPC64_ADDR32:
6463 case R_PPC64_UADDR16:
6464 case R_PPC64_UADDR32:
6465 case R_PPC64_UADDR64:
6466 case R_PPC64_TOC:
6467 break;
6468 }
6469
6470 if (local_syms != NULL)
6471 {
6472 unsigned long r_symndx;
6473 Elf_Internal_Sym *sym;
6474 bfd *ibfd = sec->owner;
6475
6476 r_symndx = ELF64_R_SYM (r_info);
6477 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6478 return FALSE;
6479 }
6480
6481 if ((info->shared
6482 && (must_be_dyn_reloc (info, r_type)
6483 || (h != NULL
6484 && (!info->symbolic
6485 || h->root.type == bfd_link_hash_defweak
6486 || !h->def_regular))))
6487 || (ELIMINATE_COPY_RELOCS
6488 && !info->shared
6489 && h != NULL
6490 && (h->root.type == bfd_link_hash_defweak
6491 || !h->def_regular)))
6492 ;
6493 else
6494 return TRUE;
6495
6496 if (h != NULL)
6497 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6498 else
6499 {
6500 if (sym_sec != NULL)
6501 {
6502 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6503 pp = (struct ppc_dyn_relocs **) vpp;
6504 }
6505 else
6506 {
6507 void *vpp = &elf_section_data (sec)->local_dynrel;
6508 pp = (struct ppc_dyn_relocs **) vpp;
6509 }
6510
6511 /* elf_gc_sweep may have already removed all dyn relocs associated
6512 with local syms for a given section. Don't report a dynreloc
6513 miscount. */
6514 if (*pp == NULL)
6515 return TRUE;
6516 }
6517
6518 while ((p = *pp) != NULL)
6519 {
6520 if (p->sec == sec)
6521 {
6522 if (!must_be_dyn_reloc (info, r_type))
6523 p->pc_count -= 1;
6524 p->count -= 1;
6525 if (p->count == 0)
6526 *pp = p->next;
6527 return TRUE;
6528 }
6529 pp = &p->next;
6530 }
6531
6532 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6533 sec->owner, sec);
6534 bfd_set_error (bfd_error_bad_value);
6535 return FALSE;
6536 }
6537
6538 /* Remove unused Official Procedure Descriptor entries. Currently we
6539 only remove those associated with functions in discarded link-once
6540 sections, or weakly defined functions that have been overridden. It
6541 would be possible to remove many more entries for statically linked
6542 applications. */
6543
6544 bfd_boolean
6545 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6546 bfd_boolean non_overlapping)
6547 {
6548 bfd *ibfd;
6549 bfd_boolean some_edited = FALSE;
6550 asection *need_pad = NULL;
6551
6552 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6553 {
6554 asection *sec;
6555 Elf_Internal_Rela *relstart, *rel, *relend;
6556 Elf_Internal_Shdr *symtab_hdr;
6557 Elf_Internal_Sym *local_syms;
6558 struct elf_link_hash_entry **sym_hashes;
6559 bfd_vma offset;
6560 struct _opd_sec_data *opd;
6561 bfd_boolean need_edit, add_aux_fields;
6562 bfd_size_type cnt_16b = 0;
6563
6564 sec = bfd_get_section_by_name (ibfd, ".opd");
6565 if (sec == NULL || sec->size == 0)
6566 continue;
6567
6568 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6569 continue;
6570
6571 if (sec->output_section == bfd_abs_section_ptr)
6572 continue;
6573
6574 /* Look through the section relocs. */
6575 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6576 continue;
6577
6578 local_syms = NULL;
6579 symtab_hdr = &elf_symtab_hdr (ibfd);
6580 sym_hashes = elf_sym_hashes (ibfd);
6581
6582 /* Read the relocations. */
6583 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6584 info->keep_memory);
6585 if (relstart == NULL)
6586 return FALSE;
6587
6588 /* First run through the relocs to check they are sane, and to
6589 determine whether we need to edit this opd section. */
6590 need_edit = FALSE;
6591 need_pad = sec;
6592 offset = 0;
6593 relend = relstart + sec->reloc_count;
6594 for (rel = relstart; rel < relend; )
6595 {
6596 enum elf_ppc64_reloc_type r_type;
6597 unsigned long r_symndx;
6598 asection *sym_sec;
6599 struct elf_link_hash_entry *h;
6600 Elf_Internal_Sym *sym;
6601
6602 /* .opd contains a regular array of 16 or 24 byte entries. We're
6603 only interested in the reloc pointing to a function entry
6604 point. */
6605 if (rel->r_offset != offset
6606 || rel + 1 >= relend
6607 || (rel + 1)->r_offset != offset + 8)
6608 {
6609 /* If someone messes with .opd alignment then after a
6610 "ld -r" we might have padding in the middle of .opd.
6611 Also, there's nothing to prevent someone putting
6612 something silly in .opd with the assembler. No .opd
6613 optimization for them! */
6614 broken_opd:
6615 (*_bfd_error_handler)
6616 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6617 need_edit = FALSE;
6618 break;
6619 }
6620
6621 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6622 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6623 {
6624 (*_bfd_error_handler)
6625 (_("%B: unexpected reloc type %u in .opd section"),
6626 ibfd, r_type);
6627 need_edit = FALSE;
6628 break;
6629 }
6630
6631 r_symndx = ELF64_R_SYM (rel->r_info);
6632 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6633 r_symndx, ibfd))
6634 goto error_ret;
6635
6636 if (sym_sec == NULL || sym_sec->owner == NULL)
6637 {
6638 const char *sym_name;
6639 if (h != NULL)
6640 sym_name = h->root.root.string;
6641 else
6642 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6643 sym_sec);
6644
6645 (*_bfd_error_handler)
6646 (_("%B: undefined sym `%s' in .opd section"),
6647 ibfd, sym_name);
6648 need_edit = FALSE;
6649 break;
6650 }
6651
6652 /* opd entries are always for functions defined in the
6653 current input bfd. If the symbol isn't defined in the
6654 input bfd, then we won't be using the function in this
6655 bfd; It must be defined in a linkonce section in another
6656 bfd, or is weak. It's also possible that we are
6657 discarding the function due to a linker script /DISCARD/,
6658 which we test for via the output_section. */
6659 if (sym_sec->owner != ibfd
6660 || sym_sec->output_section == bfd_abs_section_ptr)
6661 need_edit = TRUE;
6662
6663 rel += 2;
6664 if (rel == relend
6665 || (rel + 1 == relend && rel->r_offset == offset + 16))
6666 {
6667 if (sec->size == offset + 24)
6668 {
6669 need_pad = NULL;
6670 break;
6671 }
6672 if (rel == relend && sec->size == offset + 16)
6673 {
6674 cnt_16b++;
6675 break;
6676 }
6677 goto broken_opd;
6678 }
6679
6680 if (rel->r_offset == offset + 24)
6681 offset += 24;
6682 else if (rel->r_offset != offset + 16)
6683 goto broken_opd;
6684 else if (rel + 1 < relend
6685 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6686 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6687 {
6688 offset += 16;
6689 cnt_16b++;
6690 }
6691 else if (rel + 2 < relend
6692 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6693 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6694 {
6695 offset += 24;
6696 rel += 1;
6697 }
6698 else
6699 goto broken_opd;
6700 }
6701
6702 add_aux_fields = non_overlapping && cnt_16b > 0;
6703
6704 if (need_edit || add_aux_fields)
6705 {
6706 Elf_Internal_Rela *write_rel;
6707 bfd_byte *rptr, *wptr;
6708 bfd_byte *new_contents = NULL;
6709 bfd_boolean skip;
6710 long opd_ent_size;
6711 bfd_size_type amt;
6712
6713 amt = sec->size * sizeof (long) / 8;
6714 opd = &ppc64_elf_section_data (sec)->u.opd;
6715 opd->adjust = bfd_zalloc (obfd, amt);
6716 if (opd->adjust == NULL)
6717 return FALSE;
6718 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6719
6720 /* This seems a waste of time as input .opd sections are all
6721 zeros as generated by gcc, but I suppose there's no reason
6722 this will always be so. We might start putting something in
6723 the third word of .opd entries. */
6724 if ((sec->flags & SEC_IN_MEMORY) == 0)
6725 {
6726 bfd_byte *loc;
6727 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6728 {
6729 if (loc != NULL)
6730 free (loc);
6731 error_ret:
6732 if (local_syms != NULL
6733 && symtab_hdr->contents != (unsigned char *) local_syms)
6734 free (local_syms);
6735 if (elf_section_data (sec)->relocs != relstart)
6736 free (relstart);
6737 return FALSE;
6738 }
6739 sec->contents = loc;
6740 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6741 }
6742
6743 elf_section_data (sec)->relocs = relstart;
6744
6745 new_contents = sec->contents;
6746 if (add_aux_fields)
6747 {
6748 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6749 if (new_contents == NULL)
6750 return FALSE;
6751 need_pad = FALSE;
6752 }
6753 wptr = new_contents;
6754 rptr = sec->contents;
6755
6756 write_rel = relstart;
6757 skip = FALSE;
6758 offset = 0;
6759 opd_ent_size = 0;
6760 for (rel = relstart; rel < relend; rel++)
6761 {
6762 unsigned long r_symndx;
6763 asection *sym_sec;
6764 struct elf_link_hash_entry *h;
6765 Elf_Internal_Sym *sym;
6766
6767 r_symndx = ELF64_R_SYM (rel->r_info);
6768 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6769 r_symndx, ibfd))
6770 goto error_ret;
6771
6772 if (rel->r_offset == offset)
6773 {
6774 struct ppc_link_hash_entry *fdh = NULL;
6775
6776 /* See if the .opd entry is full 24 byte or
6777 16 byte (with fd_aux entry overlapped with next
6778 fd_func). */
6779 opd_ent_size = 24;
6780 if ((rel + 2 == relend && sec->size == offset + 16)
6781 || (rel + 3 < relend
6782 && rel[2].r_offset == offset + 16
6783 && rel[3].r_offset == offset + 24
6784 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6785 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6786 opd_ent_size = 16;
6787
6788 if (h != NULL
6789 && h->root.root.string[0] == '.')
6790 {
6791 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6792 ppc_hash_table (info));
6793 if (fdh != NULL
6794 && fdh->elf.root.type != bfd_link_hash_defined
6795 && fdh->elf.root.type != bfd_link_hash_defweak)
6796 fdh = NULL;
6797 }
6798
6799 skip = (sym_sec->owner != ibfd
6800 || sym_sec->output_section == bfd_abs_section_ptr);
6801 if (skip)
6802 {
6803 if (fdh != NULL && sym_sec->owner == ibfd)
6804 {
6805 /* Arrange for the function descriptor sym
6806 to be dropped. */
6807 fdh->elf.root.u.def.value = 0;
6808 fdh->elf.root.u.def.section = sym_sec;
6809 }
6810 opd->adjust[rel->r_offset / 8] = -1;
6811 }
6812 else
6813 {
6814 /* We'll be keeping this opd entry. */
6815
6816 if (fdh != NULL)
6817 {
6818 /* Redefine the function descriptor symbol to
6819 this location in the opd section. It is
6820 necessary to update the value here rather
6821 than using an array of adjustments as we do
6822 for local symbols, because various places
6823 in the generic ELF code use the value
6824 stored in u.def.value. */
6825 fdh->elf.root.u.def.value = wptr - new_contents;
6826 fdh->adjust_done = 1;
6827 }
6828
6829 /* Local syms are a bit tricky. We could
6830 tweak them as they can be cached, but
6831 we'd need to look through the local syms
6832 for the function descriptor sym which we
6833 don't have at the moment. So keep an
6834 array of adjustments. */
6835 opd->adjust[rel->r_offset / 8]
6836 = (wptr - new_contents) - (rptr - sec->contents);
6837
6838 if (wptr != rptr)
6839 memcpy (wptr, rptr, opd_ent_size);
6840 wptr += opd_ent_size;
6841 if (add_aux_fields && opd_ent_size == 16)
6842 {
6843 memset (wptr, '\0', 8);
6844 wptr += 8;
6845 }
6846 }
6847 rptr += opd_ent_size;
6848 offset += opd_ent_size;
6849 }
6850
6851 if (skip)
6852 {
6853 if (!NO_OPD_RELOCS
6854 && !info->relocatable
6855 && !dec_dynrel_count (rel->r_info, sec, info,
6856 NULL, h, sym_sec))
6857 goto error_ret;
6858 }
6859 else
6860 {
6861 /* We need to adjust any reloc offsets to point to the
6862 new opd entries. While we're at it, we may as well
6863 remove redundant relocs. */
6864 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
6865 if (write_rel != rel)
6866 memcpy (write_rel, rel, sizeof (*rel));
6867 ++write_rel;
6868 }
6869 }
6870
6871 sec->size = wptr - new_contents;
6872 sec->reloc_count = write_rel - relstart;
6873 if (add_aux_fields)
6874 {
6875 free (sec->contents);
6876 sec->contents = new_contents;
6877 }
6878
6879 /* Fudge the header size too, as this is used later in
6880 elf_bfd_final_link if we are emitting relocs. */
6881 elf_section_data (sec)->rel_hdr.sh_size
6882 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6883 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6884 some_edited = TRUE;
6885 }
6886 else if (elf_section_data (sec)->relocs != relstart)
6887 free (relstart);
6888
6889 if (local_syms != NULL
6890 && symtab_hdr->contents != (unsigned char *) local_syms)
6891 {
6892 if (!info->keep_memory)
6893 free (local_syms);
6894 else
6895 symtab_hdr->contents = (unsigned char *) local_syms;
6896 }
6897 }
6898
6899 if (some_edited)
6900 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6901
6902 /* If we are doing a final link and the last .opd entry is just 16 byte
6903 long, add a 8 byte padding after it. */
6904 if (need_pad != NULL && !info->relocatable)
6905 {
6906 bfd_byte *p;
6907
6908 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6909 {
6910 BFD_ASSERT (need_pad->size > 0);
6911
6912 p = bfd_malloc (need_pad->size + 8);
6913 if (p == NULL)
6914 return FALSE;
6915
6916 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6917 p, 0, need_pad->size))
6918 return FALSE;
6919
6920 need_pad->contents = p;
6921 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6922 }
6923 else
6924 {
6925 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6926 if (p == NULL)
6927 return FALSE;
6928
6929 need_pad->contents = p;
6930 }
6931
6932 memset (need_pad->contents + need_pad->size, 0, 8);
6933 need_pad->size += 8;
6934 }
6935
6936 return TRUE;
6937 }
6938
6939 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6940
6941 asection *
6942 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6943 {
6944 struct ppc_link_hash_table *htab;
6945
6946 htab = ppc_hash_table (info);
6947 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
6948 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
6949 FALSE, FALSE, TRUE));
6950 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
6951 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
6952 FALSE, FALSE, TRUE));
6953 return _bfd_elf_tls_setup (obfd, info);
6954 }
6955
6956 /* Return TRUE iff REL is a branch reloc with a global symbol matching
6957 HASH1 or HASH2. */
6958
6959 static bfd_boolean
6960 branch_reloc_hash_match (const bfd *ibfd,
6961 const Elf_Internal_Rela *rel,
6962 const struct ppc_link_hash_entry *hash1,
6963 const struct ppc_link_hash_entry *hash2)
6964 {
6965 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6966 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
6967 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
6968
6969 if (r_symndx >= symtab_hdr->sh_info
6970 && (r_type == R_PPC64_REL24
6971 || r_type == R_PPC64_REL14
6972 || r_type == R_PPC64_REL14_BRTAKEN
6973 || r_type == R_PPC64_REL14_BRNTAKEN
6974 || r_type == R_PPC64_ADDR24
6975 || r_type == R_PPC64_ADDR14
6976 || r_type == R_PPC64_ADDR14_BRTAKEN
6977 || r_type == R_PPC64_ADDR14_BRNTAKEN))
6978 {
6979 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6980 struct elf_link_hash_entry *h;
6981
6982 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6983 while (h->root.type == bfd_link_hash_indirect
6984 || h->root.type == bfd_link_hash_warning)
6985 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6986 if (h == &hash1->elf || h == &hash2->elf)
6987 return TRUE;
6988 }
6989 return FALSE;
6990 }
6991
6992 /* Run through all the TLS relocs looking for optimization
6993 opportunities. The linker has been hacked (see ppc64elf.em) to do
6994 a preliminary section layout so that we know the TLS segment
6995 offsets. We can't optimize earlier because some optimizations need
6996 to know the tp offset, and we need to optimize before allocating
6997 dynamic relocations. */
6998
6999 bfd_boolean
7000 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7001 {
7002 bfd *ibfd;
7003 asection *sec;
7004 struct ppc_link_hash_table *htab;
7005 int pass;
7006
7007 if (info->relocatable || !info->executable)
7008 return TRUE;
7009
7010 htab = ppc_hash_table (info);
7011 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7012 {
7013 Elf_Internal_Sym *locsyms = NULL;
7014 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7015 unsigned char *toc_ref = NULL;
7016
7017 /* Look at all the sections for this file. Make two passes over
7018 the relocs. On the first pass, mark toc entries involved
7019 with tls relocs, and check that tls relocs involved in
7020 setting up a tls_get_addr call are indeed followed by such a
7021 call. If they are not, exclude them from the optimizations
7022 done on the second pass. */
7023 for (pass = 0; pass < 2; ++pass)
7024 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7025 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7026 {
7027 Elf_Internal_Rela *relstart, *rel, *relend;
7028
7029 /* Read the relocations. */
7030 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7031 info->keep_memory);
7032 if (relstart == NULL)
7033 return FALSE;
7034
7035 relend = relstart + sec->reloc_count;
7036 for (rel = relstart; rel < relend; rel++)
7037 {
7038 enum elf_ppc64_reloc_type r_type;
7039 unsigned long r_symndx;
7040 struct elf_link_hash_entry *h;
7041 Elf_Internal_Sym *sym;
7042 asection *sym_sec;
7043 char *tls_mask;
7044 char tls_set, tls_clear, tls_type = 0;
7045 bfd_vma value;
7046 bfd_boolean ok_tprel, is_local;
7047 long toc_ref_index = 0;
7048 int expecting_tls_get_addr = 0;
7049
7050 r_symndx = ELF64_R_SYM (rel->r_info);
7051 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7052 r_symndx, ibfd))
7053 {
7054 err_free_rel:
7055 if (elf_section_data (sec)->relocs != relstart)
7056 free (relstart);
7057 if (toc_ref != NULL)
7058 free (toc_ref);
7059 if (locsyms != NULL
7060 && (elf_symtab_hdr (ibfd).contents
7061 != (unsigned char *) locsyms))
7062 free (locsyms);
7063 return FALSE;
7064 }
7065
7066 if (h != NULL)
7067 {
7068 if (h->root.type != bfd_link_hash_defined
7069 && h->root.type != bfd_link_hash_defweak)
7070 continue;
7071 value = h->root.u.def.value;
7072 }
7073 else
7074 /* Symbols referenced by TLS relocs must be of type
7075 STT_TLS. So no need for .opd local sym adjust. */
7076 value = sym->st_value;
7077
7078 ok_tprel = FALSE;
7079 is_local = FALSE;
7080 if (h == NULL
7081 || !h->def_dynamic)
7082 {
7083 is_local = TRUE;
7084 value += sym_sec->output_offset;
7085 value += sym_sec->output_section->vma;
7086 value -= htab->elf.tls_sec->vma;
7087 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7088 < (bfd_vma) 1 << 32);
7089 }
7090
7091 r_type = ELF64_R_TYPE (rel->r_info);
7092 switch (r_type)
7093 {
7094 case R_PPC64_GOT_TLSLD16:
7095 case R_PPC64_GOT_TLSLD16_LO:
7096 expecting_tls_get_addr = 1;
7097 /* Fall thru */
7098
7099 case R_PPC64_GOT_TLSLD16_HI:
7100 case R_PPC64_GOT_TLSLD16_HA:
7101 /* These relocs should never be against a symbol
7102 defined in a shared lib. Leave them alone if
7103 that turns out to be the case. */
7104 if (!is_local)
7105 continue;
7106
7107 /* LD -> LE */
7108 tls_set = 0;
7109 tls_clear = TLS_LD;
7110 tls_type = TLS_TLS | TLS_LD;
7111 break;
7112
7113 case R_PPC64_GOT_TLSGD16:
7114 case R_PPC64_GOT_TLSGD16_LO:
7115 expecting_tls_get_addr = 1;
7116 /* Fall thru */
7117
7118 case R_PPC64_GOT_TLSGD16_HI:
7119 case R_PPC64_GOT_TLSGD16_HA:
7120 if (ok_tprel)
7121 /* GD -> LE */
7122 tls_set = 0;
7123 else
7124 /* GD -> IE */
7125 tls_set = TLS_TLS | TLS_TPRELGD;
7126 tls_clear = TLS_GD;
7127 tls_type = TLS_TLS | TLS_GD;
7128 break;
7129
7130 case R_PPC64_GOT_TPREL16_DS:
7131 case R_PPC64_GOT_TPREL16_LO_DS:
7132 case R_PPC64_GOT_TPREL16_HI:
7133 case R_PPC64_GOT_TPREL16_HA:
7134 if (ok_tprel)
7135 {
7136 /* IE -> LE */
7137 tls_set = 0;
7138 tls_clear = TLS_TPREL;
7139 tls_type = TLS_TLS | TLS_TPREL;
7140 break;
7141 }
7142 continue;
7143
7144 case R_PPC64_TOC16:
7145 case R_PPC64_TOC16_LO:
7146 case R_PPC64_TLS:
7147 case R_PPC64_TLSGD:
7148 case R_PPC64_TLSLD:
7149 if (sym_sec == NULL || sym_sec != toc)
7150 continue;
7151
7152 /* Mark this toc entry as referenced by a TLS
7153 code sequence. We can do that now in the
7154 case of R_PPC64_TLS, and after checking for
7155 tls_get_addr for the TOC16 relocs. */
7156 if (toc_ref == NULL)
7157 {
7158 toc_ref = bfd_zmalloc (toc->size / 8);
7159 if (toc_ref == NULL)
7160 goto err_free_rel;
7161 }
7162 if (h != NULL)
7163 value = h->root.u.def.value;
7164 else
7165 value = sym->st_value;
7166 value += rel->r_addend;
7167 BFD_ASSERT (value < toc->size && value % 8 == 0);
7168 toc_ref_index = value / 8;
7169 if (r_type == R_PPC64_TLS
7170 || r_type == R_PPC64_TLSGD
7171 || r_type == R_PPC64_TLSLD)
7172 {
7173 toc_ref[toc_ref_index] = 1;
7174 continue;
7175 }
7176
7177 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7178 continue;
7179
7180 tls_set = 0;
7181 tls_clear = 0;
7182 expecting_tls_get_addr = 2;
7183 break;
7184
7185 case R_PPC64_TPREL64:
7186 if (pass == 0
7187 || sec != toc
7188 || toc_ref == NULL
7189 || !toc_ref[rel->r_offset / 8])
7190 continue;
7191 if (ok_tprel)
7192 {
7193 /* IE -> LE */
7194 tls_set = TLS_EXPLICIT;
7195 tls_clear = TLS_TPREL;
7196 break;
7197 }
7198 continue;
7199
7200 case R_PPC64_DTPMOD64:
7201 if (pass == 0
7202 || sec != toc
7203 || toc_ref == NULL
7204 || !toc_ref[rel->r_offset / 8])
7205 continue;
7206 if (rel + 1 < relend
7207 && (rel[1].r_info
7208 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7209 && rel[1].r_offset == rel->r_offset + 8)
7210 {
7211 if (ok_tprel)
7212 /* GD -> LE */
7213 tls_set = TLS_EXPLICIT | TLS_GD;
7214 else
7215 /* GD -> IE */
7216 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7217 tls_clear = TLS_GD;
7218 }
7219 else
7220 {
7221 if (!is_local)
7222 continue;
7223
7224 /* LD -> LE */
7225 tls_set = TLS_EXPLICIT;
7226 tls_clear = TLS_LD;
7227 }
7228 break;
7229
7230 default:
7231 continue;
7232 }
7233
7234 if (pass == 0)
7235 {
7236 if (!expecting_tls_get_addr
7237 || !sec->has_tls_get_addr_call)
7238 continue;
7239
7240 if (rel + 1 < relend
7241 && branch_reloc_hash_match (ibfd, rel + 1,
7242 htab->tls_get_addr,
7243 htab->tls_get_addr_fd))
7244 {
7245 if (expecting_tls_get_addr == 2)
7246 {
7247 /* Check for toc tls entries. */
7248 char *toc_tls;
7249 int retval;
7250
7251 retval = get_tls_mask (&toc_tls, NULL, NULL,
7252 &locsyms,
7253 rel, ibfd);
7254 if (retval == 0)
7255 goto err_free_rel;
7256 if (retval > 1 && toc_tls != NULL)
7257 toc_ref[toc_ref_index] = 1;
7258 }
7259 continue;
7260 }
7261
7262 if (expecting_tls_get_addr != 1)
7263 continue;
7264
7265 /* Uh oh, we didn't find the expected call. We
7266 could just mark this symbol to exclude it
7267 from tls optimization but it's safer to skip
7268 the entire section. */
7269 sec->has_tls_reloc = 0;
7270 break;
7271 }
7272
7273 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7274 {
7275 struct plt_entry *ent;
7276 for (ent = htab->tls_get_addr->elf.plt.plist;
7277 ent != NULL;
7278 ent = ent->next)
7279 if (ent->addend == 0)
7280 {
7281 if (ent->plt.refcount > 0)
7282 {
7283 ent->plt.refcount -= 1;
7284 expecting_tls_get_addr = 0;
7285 }
7286 break;
7287 }
7288 }
7289
7290 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7291 {
7292 struct plt_entry *ent;
7293 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7294 ent != NULL;
7295 ent = ent->next)
7296 if (ent->addend == 0)
7297 {
7298 if (ent->plt.refcount > 0)
7299 ent->plt.refcount -= 1;
7300 break;
7301 }
7302 }
7303
7304 if (tls_clear == 0)
7305 continue;
7306
7307 if ((tls_set & TLS_EXPLICIT) == 0)
7308 {
7309 struct got_entry *ent;
7310
7311 /* Adjust got entry for this reloc. */
7312 if (h != NULL)
7313 ent = h->got.glist;
7314 else
7315 ent = elf_local_got_ents (ibfd)[r_symndx];
7316
7317 for (; ent != NULL; ent = ent->next)
7318 if (ent->addend == rel->r_addend
7319 && ent->owner == ibfd
7320 && ent->tls_type == tls_type)
7321 break;
7322 if (ent == NULL)
7323 abort ();
7324
7325 if (tls_set == 0)
7326 {
7327 /* We managed to get rid of a got entry. */
7328 if (ent->got.refcount > 0)
7329 ent->got.refcount -= 1;
7330 }
7331 }
7332 else
7333 {
7334 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7335 we'll lose one or two dyn relocs. */
7336 if (!dec_dynrel_count (rel->r_info, sec, info,
7337 NULL, h, sym_sec))
7338 return FALSE;
7339
7340 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7341 {
7342 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7343 NULL, h, sym_sec))
7344 return FALSE;
7345 }
7346 }
7347
7348 *tls_mask |= tls_set;
7349 *tls_mask &= ~tls_clear;
7350 }
7351
7352 if (elf_section_data (sec)->relocs != relstart)
7353 free (relstart);
7354 }
7355
7356 if (toc_ref != NULL)
7357 free (toc_ref);
7358
7359 if (locsyms != NULL
7360 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7361 {
7362 if (!info->keep_memory)
7363 free (locsyms);
7364 else
7365 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7366 }
7367 }
7368 return TRUE;
7369 }
7370
7371 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7372 the values of any global symbols in a toc section that has been
7373 edited. Globals in toc sections should be a rarity, so this function
7374 sets a flag if any are found in toc sections other than the one just
7375 edited, so that futher hash table traversals can be avoided. */
7376
7377 struct adjust_toc_info
7378 {
7379 asection *toc;
7380 unsigned long *skip;
7381 bfd_boolean global_toc_syms;
7382 };
7383
7384 static bfd_boolean
7385 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7386 {
7387 struct ppc_link_hash_entry *eh;
7388 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7389
7390 if (h->root.type == bfd_link_hash_indirect)
7391 return TRUE;
7392
7393 if (h->root.type == bfd_link_hash_warning)
7394 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7395
7396 if (h->root.type != bfd_link_hash_defined
7397 && h->root.type != bfd_link_hash_defweak)
7398 return TRUE;
7399
7400 eh = (struct ppc_link_hash_entry *) h;
7401 if (eh->adjust_done)
7402 return TRUE;
7403
7404 if (eh->elf.root.u.def.section == toc_inf->toc)
7405 {
7406 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7407 if (skip != (unsigned long) -1)
7408 eh->elf.root.u.def.value -= skip;
7409 else
7410 {
7411 (*_bfd_error_handler)
7412 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7413 eh->elf.root.u.def.section = &bfd_abs_section;
7414 eh->elf.root.u.def.value = 0;
7415 }
7416 eh->adjust_done = 1;
7417 }
7418 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7419 toc_inf->global_toc_syms = TRUE;
7420
7421 return TRUE;
7422 }
7423
7424 /* Examine all relocs referencing .toc sections in order to remove
7425 unused .toc entries. */
7426
7427 bfd_boolean
7428 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7429 {
7430 bfd *ibfd;
7431 struct adjust_toc_info toc_inf;
7432
7433 toc_inf.global_toc_syms = TRUE;
7434 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7435 {
7436 asection *toc, *sec;
7437 Elf_Internal_Shdr *symtab_hdr;
7438 Elf_Internal_Sym *local_syms;
7439 struct elf_link_hash_entry **sym_hashes;
7440 Elf_Internal_Rela *relstart, *rel;
7441 unsigned long *skip, *drop;
7442 unsigned char *used;
7443 unsigned char *keep, last, some_unused;
7444
7445 toc = bfd_get_section_by_name (ibfd, ".toc");
7446 if (toc == NULL
7447 || toc->size == 0
7448 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7449 || elf_discarded_section (toc))
7450 continue;
7451
7452 local_syms = NULL;
7453 symtab_hdr = &elf_symtab_hdr (ibfd);
7454 sym_hashes = elf_sym_hashes (ibfd);
7455
7456 /* Look at sections dropped from the final link. */
7457 skip = NULL;
7458 relstart = NULL;
7459 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7460 {
7461 if (sec->reloc_count == 0
7462 || !elf_discarded_section (sec)
7463 || get_opd_info (sec)
7464 || (sec->flags & SEC_ALLOC) == 0
7465 || (sec->flags & SEC_DEBUGGING) != 0)
7466 continue;
7467
7468 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7469 if (relstart == NULL)
7470 goto error_ret;
7471
7472 /* Run through the relocs to see which toc entries might be
7473 unused. */
7474 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7475 {
7476 enum elf_ppc64_reloc_type r_type;
7477 unsigned long r_symndx;
7478 asection *sym_sec;
7479 struct elf_link_hash_entry *h;
7480 Elf_Internal_Sym *sym;
7481 bfd_vma val;
7482
7483 r_type = ELF64_R_TYPE (rel->r_info);
7484 switch (r_type)
7485 {
7486 default:
7487 continue;
7488
7489 case R_PPC64_TOC16:
7490 case R_PPC64_TOC16_LO:
7491 case R_PPC64_TOC16_HI:
7492 case R_PPC64_TOC16_HA:
7493 case R_PPC64_TOC16_DS:
7494 case R_PPC64_TOC16_LO_DS:
7495 break;
7496 }
7497
7498 r_symndx = ELF64_R_SYM (rel->r_info);
7499 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7500 r_symndx, ibfd))
7501 goto error_ret;
7502
7503 if (sym_sec != toc)
7504 continue;
7505
7506 if (h != NULL)
7507 val = h->root.u.def.value;
7508 else
7509 val = sym->st_value;
7510 val += rel->r_addend;
7511
7512 if (val >= toc->size)
7513 continue;
7514
7515 /* Anything in the toc ought to be aligned to 8 bytes.
7516 If not, don't mark as unused. */
7517 if (val & 7)
7518 continue;
7519
7520 if (skip == NULL)
7521 {
7522 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7523 if (skip == NULL)
7524 goto error_ret;
7525 }
7526
7527 skip[val >> 3] = 1;
7528 }
7529
7530 if (elf_section_data (sec)->relocs != relstart)
7531 free (relstart);
7532 }
7533
7534 if (skip == NULL)
7535 continue;
7536
7537 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7538 if (used == NULL)
7539 {
7540 error_ret:
7541 if (local_syms != NULL
7542 && symtab_hdr->contents != (unsigned char *) local_syms)
7543 free (local_syms);
7544 if (sec != NULL
7545 && relstart != NULL
7546 && elf_section_data (sec)->relocs != relstart)
7547 free (relstart);
7548 if (skip != NULL)
7549 free (skip);
7550 return FALSE;
7551 }
7552
7553 /* Now check all kept sections that might reference the toc.
7554 Check the toc itself last. */
7555 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7556 : ibfd->sections);
7557 sec != NULL;
7558 sec = (sec == toc ? NULL
7559 : sec->next == NULL ? toc
7560 : sec->next == toc && toc->next ? toc->next
7561 : sec->next))
7562 {
7563 int repeat;
7564
7565 if (sec->reloc_count == 0
7566 || elf_discarded_section (sec)
7567 || get_opd_info (sec)
7568 || (sec->flags & SEC_ALLOC) == 0
7569 || (sec->flags & SEC_DEBUGGING) != 0)
7570 continue;
7571
7572 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7573 if (relstart == NULL)
7574 goto error_ret;
7575
7576 /* Mark toc entries referenced as used. */
7577 repeat = 0;
7578 do
7579 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7580 {
7581 enum elf_ppc64_reloc_type r_type;
7582 unsigned long r_symndx;
7583 asection *sym_sec;
7584 struct elf_link_hash_entry *h;
7585 Elf_Internal_Sym *sym;
7586 bfd_vma val;
7587
7588 r_type = ELF64_R_TYPE (rel->r_info);
7589 switch (r_type)
7590 {
7591 case R_PPC64_TOC16:
7592 case R_PPC64_TOC16_LO:
7593 case R_PPC64_TOC16_HI:
7594 case R_PPC64_TOC16_HA:
7595 case R_PPC64_TOC16_DS:
7596 case R_PPC64_TOC16_LO_DS:
7597 /* In case we're taking addresses of toc entries. */
7598 case R_PPC64_ADDR64:
7599 break;
7600
7601 default:
7602 continue;
7603 }
7604
7605 r_symndx = ELF64_R_SYM (rel->r_info);
7606 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7607 r_symndx, ibfd))
7608 {
7609 free (used);
7610 goto error_ret;
7611 }
7612
7613 if (sym_sec != toc)
7614 continue;
7615
7616 if (h != NULL)
7617 val = h->root.u.def.value;
7618 else
7619 val = sym->st_value;
7620 val += rel->r_addend;
7621
7622 if (val >= toc->size)
7623 continue;
7624
7625 /* For the toc section, we only mark as used if
7626 this entry itself isn't unused. */
7627 if (sec == toc
7628 && !used[val >> 3]
7629 && (used[rel->r_offset >> 3]
7630 || !skip[rel->r_offset >> 3]))
7631 /* Do all the relocs again, to catch reference
7632 chains. */
7633 repeat = 1;
7634
7635 used[val >> 3] = 1;
7636 }
7637 while (repeat);
7638 }
7639
7640 /* Merge the used and skip arrays. Assume that TOC
7641 doublewords not appearing as either used or unused belong
7642 to to an entry more than one doubleword in size. */
7643 for (drop = skip, keep = used, last = 0, some_unused = 0;
7644 drop < skip + (toc->size + 7) / 8;
7645 ++drop, ++keep)
7646 {
7647 if (*keep)
7648 {
7649 *drop = 0;
7650 last = 0;
7651 }
7652 else if (*drop)
7653 {
7654 some_unused = 1;
7655 last = 1;
7656 }
7657 else
7658 *drop = last;
7659 }
7660
7661 free (used);
7662
7663 if (some_unused)
7664 {
7665 bfd_byte *contents, *src;
7666 unsigned long off;
7667
7668 /* Shuffle the toc contents, and at the same time convert the
7669 skip array from booleans into offsets. */
7670 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7671 goto error_ret;
7672
7673 elf_section_data (toc)->this_hdr.contents = contents;
7674
7675 for (src = contents, off = 0, drop = skip;
7676 src < contents + toc->size;
7677 src += 8, ++drop)
7678 {
7679 if (*drop)
7680 {
7681 *drop = (unsigned long) -1;
7682 off += 8;
7683 }
7684 else if (off != 0)
7685 {
7686 *drop = off;
7687 memcpy (src - off, src, 8);
7688 }
7689 }
7690 toc->rawsize = toc->size;
7691 toc->size = src - contents - off;
7692
7693 if (toc->reloc_count != 0)
7694 {
7695 Elf_Internal_Rela *wrel;
7696 bfd_size_type sz;
7697
7698 /* Read toc relocs. */
7699 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7700 TRUE);
7701 if (relstart == NULL)
7702 goto error_ret;
7703
7704 /* Remove unused toc relocs, and adjust those we keep. */
7705 wrel = relstart;
7706 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7707 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7708 {
7709 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7710 wrel->r_info = rel->r_info;
7711 wrel->r_addend = rel->r_addend;
7712 ++wrel;
7713 }
7714 else if (!dec_dynrel_count (rel->r_info, toc, info,
7715 &local_syms, NULL, NULL))
7716 goto error_ret;
7717
7718 toc->reloc_count = wrel - relstart;
7719 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7720 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7721 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7722 }
7723
7724 /* Adjust addends for relocs against the toc section sym. */
7725 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7726 {
7727 if (sec->reloc_count == 0
7728 || elf_discarded_section (sec))
7729 continue;
7730
7731 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7732 TRUE);
7733 if (relstart == NULL)
7734 goto error_ret;
7735
7736 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7737 {
7738 enum elf_ppc64_reloc_type r_type;
7739 unsigned long r_symndx;
7740 asection *sym_sec;
7741 struct elf_link_hash_entry *h;
7742 Elf_Internal_Sym *sym;
7743
7744 r_type = ELF64_R_TYPE (rel->r_info);
7745 switch (r_type)
7746 {
7747 default:
7748 continue;
7749
7750 case R_PPC64_TOC16:
7751 case R_PPC64_TOC16_LO:
7752 case R_PPC64_TOC16_HI:
7753 case R_PPC64_TOC16_HA:
7754 case R_PPC64_TOC16_DS:
7755 case R_PPC64_TOC16_LO_DS:
7756 case R_PPC64_ADDR64:
7757 break;
7758 }
7759
7760 r_symndx = ELF64_R_SYM (rel->r_info);
7761 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7762 r_symndx, ibfd))
7763 goto error_ret;
7764
7765 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7766 continue;
7767
7768 rel->r_addend -= skip[rel->r_addend >> 3];
7769 }
7770 }
7771
7772 /* We shouldn't have local or global symbols defined in the TOC,
7773 but handle them anyway. */
7774 if (local_syms != NULL)
7775 {
7776 Elf_Internal_Sym *sym;
7777
7778 for (sym = local_syms;
7779 sym < local_syms + symtab_hdr->sh_info;
7780 ++sym)
7781 if (sym->st_value != 0
7782 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7783 {
7784 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7785 sym->st_value -= skip[sym->st_value >> 3];
7786 else
7787 {
7788 (*_bfd_error_handler)
7789 (_("%s defined in removed toc entry"),
7790 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7791 NULL));
7792 sym->st_value = 0;
7793 sym->st_shndx = SHN_ABS;
7794 }
7795 symtab_hdr->contents = (unsigned char *) local_syms;
7796 }
7797 }
7798
7799 /* Finally, adjust any global syms defined in the toc. */
7800 if (toc_inf.global_toc_syms)
7801 {
7802 toc_inf.toc = toc;
7803 toc_inf.skip = skip;
7804 toc_inf.global_toc_syms = FALSE;
7805 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7806 &toc_inf);
7807 }
7808 }
7809
7810 if (local_syms != NULL
7811 && symtab_hdr->contents != (unsigned char *) local_syms)
7812 {
7813 if (!info->keep_memory)
7814 free (local_syms);
7815 else
7816 symtab_hdr->contents = (unsigned char *) local_syms;
7817 }
7818 free (skip);
7819 }
7820
7821 return TRUE;
7822 }
7823
7824 /* Allocate space in .plt, .got and associated reloc sections for
7825 dynamic relocs. */
7826
7827 static bfd_boolean
7828 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7829 {
7830 struct bfd_link_info *info;
7831 struct ppc_link_hash_table *htab;
7832 asection *s;
7833 struct ppc_link_hash_entry *eh;
7834 struct ppc_dyn_relocs *p;
7835 struct got_entry *gent;
7836
7837 if (h->root.type == bfd_link_hash_indirect)
7838 return TRUE;
7839
7840 if (h->root.type == bfd_link_hash_warning)
7841 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7842
7843 info = (struct bfd_link_info *) inf;
7844 htab = ppc_hash_table (info);
7845
7846 if (htab->elf.dynamic_sections_created
7847 && h->dynindx != -1
7848 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7849 {
7850 struct plt_entry *pent;
7851 bfd_boolean doneone = FALSE;
7852 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7853 if (pent->plt.refcount > 0)
7854 {
7855 /* If this is the first .plt entry, make room for the special
7856 first entry. */
7857 s = htab->plt;
7858 if (s->size == 0)
7859 s->size += PLT_INITIAL_ENTRY_SIZE;
7860
7861 pent->plt.offset = s->size;
7862
7863 /* Make room for this entry. */
7864 s->size += PLT_ENTRY_SIZE;
7865
7866 /* Make room for the .glink code. */
7867 s = htab->glink;
7868 if (s->size == 0)
7869 s->size += GLINK_CALL_STUB_SIZE;
7870 /* We need bigger stubs past index 32767. */
7871 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7872 s->size += 4;
7873 s->size += 2*4;
7874
7875 /* We also need to make an entry in the .rela.plt section. */
7876 s = htab->relplt;
7877 s->size += sizeof (Elf64_External_Rela);
7878 doneone = TRUE;
7879 }
7880 else
7881 pent->plt.offset = (bfd_vma) -1;
7882 if (!doneone)
7883 {
7884 h->plt.plist = NULL;
7885 h->needs_plt = 0;
7886 }
7887 }
7888 else
7889 {
7890 h->plt.plist = NULL;
7891 h->needs_plt = 0;
7892 }
7893
7894 eh = (struct ppc_link_hash_entry *) h;
7895 /* Run through the TLS GD got entries first if we're changing them
7896 to TPREL. */
7897 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7898 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7899 if (gent->got.refcount > 0
7900 && (gent->tls_type & TLS_GD) != 0)
7901 {
7902 /* This was a GD entry that has been converted to TPREL. If
7903 there happens to be a TPREL entry we can use that one. */
7904 struct got_entry *ent;
7905 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7906 if (ent->got.refcount > 0
7907 && (ent->tls_type & TLS_TPREL) != 0
7908 && ent->addend == gent->addend
7909 && ent->owner == gent->owner)
7910 {
7911 gent->got.refcount = 0;
7912 break;
7913 }
7914
7915 /* If not, then we'll be using our own TPREL entry. */
7916 if (gent->got.refcount != 0)
7917 gent->tls_type = TLS_TLS | TLS_TPREL;
7918 }
7919
7920 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7921 if (gent->got.refcount > 0)
7922 {
7923 bfd_boolean dyn;
7924
7925 /* Make sure this symbol is output as a dynamic symbol.
7926 Undefined weak syms won't yet be marked as dynamic,
7927 nor will all TLS symbols. */
7928 if (h->dynindx == -1
7929 && !h->forced_local
7930 && htab->elf.dynamic_sections_created)
7931 {
7932 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7933 return FALSE;
7934 }
7935
7936 if ((gent->tls_type & TLS_LD) != 0
7937 && !h->def_dynamic)
7938 {
7939 ppc64_tlsld_got (gent->owner)->refcount += 1;
7940 gent->got.offset = (bfd_vma) -1;
7941 continue;
7942 }
7943
7944 if (!is_ppc64_elf (gent->owner))
7945 continue;
7946
7947 s = ppc64_elf_tdata (gent->owner)->got;
7948 gent->got.offset = s->size;
7949 s->size
7950 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7951 dyn = htab->elf.dynamic_sections_created;
7952 if ((info->shared
7953 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7954 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7955 || h->root.type != bfd_link_hash_undefweak))
7956 ppc64_elf_tdata (gent->owner)->relgot->size
7957 += (gent->tls_type & eh->tls_mask & TLS_GD
7958 ? 2 * sizeof (Elf64_External_Rela)
7959 : sizeof (Elf64_External_Rela));
7960 }
7961 else
7962 gent->got.offset = (bfd_vma) -1;
7963
7964 if (eh->dyn_relocs == NULL
7965 || !htab->elf.dynamic_sections_created)
7966 return TRUE;
7967
7968 /* In the shared -Bsymbolic case, discard space allocated for
7969 dynamic pc-relative relocs against symbols which turn out to be
7970 defined in regular objects. For the normal shared case, discard
7971 space for relocs that have become local due to symbol visibility
7972 changes. */
7973
7974 if (info->shared)
7975 {
7976 /* Relocs that use pc_count are those that appear on a call insn,
7977 or certain REL relocs (see must_be_dyn_reloc) that can be
7978 generated via assembly. We want calls to protected symbols to
7979 resolve directly to the function rather than going via the plt.
7980 If people want function pointer comparisons to work as expected
7981 then they should avoid writing weird assembly. */
7982 if (SYMBOL_CALLS_LOCAL (info, h))
7983 {
7984 struct ppc_dyn_relocs **pp;
7985
7986 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7987 {
7988 p->count -= p->pc_count;
7989 p->pc_count = 0;
7990 if (p->count == 0)
7991 *pp = p->next;
7992 else
7993 pp = &p->next;
7994 }
7995 }
7996
7997 /* Also discard relocs on undefined weak syms with non-default
7998 visibility. */
7999 if (eh->dyn_relocs != NULL
8000 && h->root.type == bfd_link_hash_undefweak)
8001 {
8002 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8003 eh->dyn_relocs = NULL;
8004
8005 /* Make sure this symbol is output as a dynamic symbol.
8006 Undefined weak syms won't yet be marked as dynamic. */
8007 else if (h->dynindx == -1
8008 && !h->forced_local)
8009 {
8010 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8011 return FALSE;
8012 }
8013 }
8014 }
8015 else if (ELIMINATE_COPY_RELOCS)
8016 {
8017 /* For the non-shared case, discard space for relocs against
8018 symbols which turn out to need copy relocs or are not
8019 dynamic. */
8020
8021 if (!h->non_got_ref
8022 && !h->def_regular)
8023 {
8024 /* Make sure this symbol is output as a dynamic symbol.
8025 Undefined weak syms won't yet be marked as dynamic. */
8026 if (h->dynindx == -1
8027 && !h->forced_local)
8028 {
8029 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8030 return FALSE;
8031 }
8032
8033 /* If that succeeded, we know we'll be keeping all the
8034 relocs. */
8035 if (h->dynindx != -1)
8036 goto keep;
8037 }
8038
8039 eh->dyn_relocs = NULL;
8040
8041 keep: ;
8042 }
8043
8044 /* Finally, allocate space. */
8045 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8046 {
8047 asection *sreloc = elf_section_data (p->sec)->sreloc;
8048 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8049 }
8050
8051 return TRUE;
8052 }
8053
8054 /* Find any dynamic relocs that apply to read-only sections. */
8055
8056 static bfd_boolean
8057 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8058 {
8059 struct ppc_link_hash_entry *eh;
8060 struct ppc_dyn_relocs *p;
8061
8062 if (h->root.type == bfd_link_hash_warning)
8063 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8064
8065 eh = (struct ppc_link_hash_entry *) h;
8066 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8067 {
8068 asection *s = p->sec->output_section;
8069
8070 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8071 {
8072 struct bfd_link_info *info = inf;
8073
8074 info->flags |= DF_TEXTREL;
8075
8076 /* Not an error, just cut short the traversal. */
8077 return FALSE;
8078 }
8079 }
8080 return TRUE;
8081 }
8082
8083 /* Set the sizes of the dynamic sections. */
8084
8085 static bfd_boolean
8086 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8087 struct bfd_link_info *info)
8088 {
8089 struct ppc_link_hash_table *htab;
8090 bfd *dynobj;
8091 asection *s;
8092 bfd_boolean relocs;
8093 bfd *ibfd;
8094
8095 htab = ppc_hash_table (info);
8096 dynobj = htab->elf.dynobj;
8097 if (dynobj == NULL)
8098 abort ();
8099
8100 if (htab->elf.dynamic_sections_created)
8101 {
8102 /* Set the contents of the .interp section to the interpreter. */
8103 if (info->executable)
8104 {
8105 s = bfd_get_section_by_name (dynobj, ".interp");
8106 if (s == NULL)
8107 abort ();
8108 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8109 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8110 }
8111 }
8112
8113 /* Set up .got offsets for local syms, and space for local dynamic
8114 relocs. */
8115 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8116 {
8117 struct got_entry **lgot_ents;
8118 struct got_entry **end_lgot_ents;
8119 char *lgot_masks;
8120 bfd_size_type locsymcount;
8121 Elf_Internal_Shdr *symtab_hdr;
8122 asection *srel;
8123
8124 if (!is_ppc64_elf (ibfd))
8125 continue;
8126
8127 for (s = ibfd->sections; s != NULL; s = s->next)
8128 {
8129 struct ppc_dyn_relocs *p;
8130
8131 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8132 {
8133 if (!bfd_is_abs_section (p->sec)
8134 && bfd_is_abs_section (p->sec->output_section))
8135 {
8136 /* Input section has been discarded, either because
8137 it is a copy of a linkonce section or due to
8138 linker script /DISCARD/, so we'll be discarding
8139 the relocs too. */
8140 }
8141 else if (p->count != 0)
8142 {
8143 srel = elf_section_data (p->sec)->sreloc;
8144 srel->size += p->count * sizeof (Elf64_External_Rela);
8145 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8146 info->flags |= DF_TEXTREL;
8147 }
8148 }
8149 }
8150
8151 lgot_ents = elf_local_got_ents (ibfd);
8152 if (!lgot_ents)
8153 continue;
8154
8155 symtab_hdr = &elf_symtab_hdr (ibfd);
8156 locsymcount = symtab_hdr->sh_info;
8157 end_lgot_ents = lgot_ents + locsymcount;
8158 lgot_masks = (char *) end_lgot_ents;
8159 s = ppc64_elf_tdata (ibfd)->got;
8160 srel = ppc64_elf_tdata (ibfd)->relgot;
8161 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8162 {
8163 struct got_entry *ent;
8164
8165 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8166 if (ent->got.refcount > 0)
8167 {
8168 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8169 {
8170 ppc64_tlsld_got (ibfd)->refcount += 1;
8171 ent->got.offset = (bfd_vma) -1;
8172 }
8173 else
8174 {
8175 ent->got.offset = s->size;
8176 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8177 {
8178 s->size += 16;
8179 if (info->shared)
8180 srel->size += 2 * sizeof (Elf64_External_Rela);
8181 }
8182 else
8183 {
8184 s->size += 8;
8185 if (info->shared)
8186 srel->size += sizeof (Elf64_External_Rela);
8187 }
8188 }
8189 }
8190 else
8191 ent->got.offset = (bfd_vma) -1;
8192 }
8193 }
8194
8195 /* Allocate global sym .plt and .got entries, and space for global
8196 sym dynamic relocs. */
8197 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8198
8199 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8200 {
8201 if (!is_ppc64_elf (ibfd))
8202 continue;
8203
8204 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8205 {
8206 s = ppc64_elf_tdata (ibfd)->got;
8207 ppc64_tlsld_got (ibfd)->offset = s->size;
8208 s->size += 16;
8209 if (info->shared)
8210 {
8211 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8212 srel->size += sizeof (Elf64_External_Rela);
8213 }
8214 }
8215 else
8216 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8217 }
8218
8219 /* We now have determined the sizes of the various dynamic sections.
8220 Allocate memory for them. */
8221 relocs = FALSE;
8222 for (s = dynobj->sections; s != NULL; s = s->next)
8223 {
8224 if ((s->flags & SEC_LINKER_CREATED) == 0)
8225 continue;
8226
8227 if (s == htab->brlt || s == htab->relbrlt)
8228 /* These haven't been allocated yet; don't strip. */
8229 continue;
8230 else if (s == htab->got
8231 || s == htab->plt
8232 || s == htab->glink
8233 || s == htab->dynbss)
8234 {
8235 /* Strip this section if we don't need it; see the
8236 comment below. */
8237 }
8238 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8239 {
8240 if (s->size != 0)
8241 {
8242 if (s != htab->relplt)
8243 relocs = TRUE;
8244
8245 /* We use the reloc_count field as a counter if we need
8246 to copy relocs into the output file. */
8247 s->reloc_count = 0;
8248 }
8249 }
8250 else
8251 {
8252 /* It's not one of our sections, so don't allocate space. */
8253 continue;
8254 }
8255
8256 if (s->size == 0)
8257 {
8258 /* If we don't need this section, strip it from the
8259 output file. This is mostly to handle .rela.bss and
8260 .rela.plt. We must create both sections in
8261 create_dynamic_sections, because they must be created
8262 before the linker maps input sections to output
8263 sections. The linker does that before
8264 adjust_dynamic_symbol is called, and it is that
8265 function which decides whether anything needs to go
8266 into these sections. */
8267 s->flags |= SEC_EXCLUDE;
8268 continue;
8269 }
8270
8271 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8272 continue;
8273
8274 /* Allocate memory for the section contents. We use bfd_zalloc
8275 here in case unused entries are not reclaimed before the
8276 section's contents are written out. This should not happen,
8277 but this way if it does we get a R_PPC64_NONE reloc in .rela
8278 sections instead of garbage.
8279 We also rely on the section contents being zero when writing
8280 the GOT. */
8281 s->contents = bfd_zalloc (dynobj, s->size);
8282 if (s->contents == NULL)
8283 return FALSE;
8284 }
8285
8286 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8287 {
8288 if (!is_ppc64_elf (ibfd))
8289 continue;
8290
8291 s = ppc64_elf_tdata (ibfd)->got;
8292 if (s != NULL && s != htab->got)
8293 {
8294 if (s->size == 0)
8295 s->flags |= SEC_EXCLUDE;
8296 else
8297 {
8298 s->contents = bfd_zalloc (ibfd, s->size);
8299 if (s->contents == NULL)
8300 return FALSE;
8301 }
8302 }
8303 s = ppc64_elf_tdata (ibfd)->relgot;
8304 if (s != NULL)
8305 {
8306 if (s->size == 0)
8307 s->flags |= SEC_EXCLUDE;
8308 else
8309 {
8310 s->contents = bfd_zalloc (ibfd, s->size);
8311 if (s->contents == NULL)
8312 return FALSE;
8313 relocs = TRUE;
8314 s->reloc_count = 0;
8315 }
8316 }
8317 }
8318
8319 if (htab->elf.dynamic_sections_created)
8320 {
8321 /* Add some entries to the .dynamic section. We fill in the
8322 values later, in ppc64_elf_finish_dynamic_sections, but we
8323 must add the entries now so that we get the correct size for
8324 the .dynamic section. The DT_DEBUG entry is filled in by the
8325 dynamic linker and used by the debugger. */
8326 #define add_dynamic_entry(TAG, VAL) \
8327 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8328
8329 if (info->executable)
8330 {
8331 if (!add_dynamic_entry (DT_DEBUG, 0))
8332 return FALSE;
8333 }
8334
8335 if (htab->plt != NULL && htab->plt->size != 0)
8336 {
8337 if (!add_dynamic_entry (DT_PLTGOT, 0)
8338 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8339 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8340 || !add_dynamic_entry (DT_JMPREL, 0)
8341 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8342 return FALSE;
8343 }
8344
8345 if (NO_OPD_RELOCS)
8346 {
8347 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8348 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8349 return FALSE;
8350 }
8351
8352 if (relocs)
8353 {
8354 if (!add_dynamic_entry (DT_RELA, 0)
8355 || !add_dynamic_entry (DT_RELASZ, 0)
8356 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8357 return FALSE;
8358
8359 /* If any dynamic relocs apply to a read-only section,
8360 then we need a DT_TEXTREL entry. */
8361 if ((info->flags & DF_TEXTREL) == 0)
8362 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8363
8364 if ((info->flags & DF_TEXTREL) != 0)
8365 {
8366 if (!add_dynamic_entry (DT_TEXTREL, 0))
8367 return FALSE;
8368 }
8369 }
8370 }
8371 #undef add_dynamic_entry
8372
8373 return TRUE;
8374 }
8375
8376 /* Determine the type of stub needed, if any, for a call. */
8377
8378 static inline enum ppc_stub_type
8379 ppc_type_of_stub (asection *input_sec,
8380 const Elf_Internal_Rela *rel,
8381 struct ppc_link_hash_entry **hash,
8382 bfd_vma destination)
8383 {
8384 struct ppc_link_hash_entry *h = *hash;
8385 bfd_vma location;
8386 bfd_vma branch_offset;
8387 bfd_vma max_branch_offset;
8388 enum elf_ppc64_reloc_type r_type;
8389
8390 if (h != NULL)
8391 {
8392 struct ppc_link_hash_entry *fdh = h;
8393 if (fdh->oh != NULL
8394 && fdh->oh->is_func_descriptor)
8395 fdh = fdh->oh;
8396
8397 if (fdh->elf.dynindx != -1)
8398 {
8399 struct plt_entry *ent;
8400
8401 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8402 if (ent->addend == rel->r_addend
8403 && ent->plt.offset != (bfd_vma) -1)
8404 {
8405 *hash = fdh;
8406 return ppc_stub_plt_call;
8407 }
8408 }
8409
8410 /* Here, we know we don't have a plt entry. If we don't have a
8411 either a defined function descriptor or a defined entry symbol
8412 in a regular object file, then it is pointless trying to make
8413 any other type of stub. */
8414 if (!((fdh->elf.root.type == bfd_link_hash_defined
8415 || fdh->elf.root.type == bfd_link_hash_defweak)
8416 && fdh->elf.root.u.def.section->output_section != NULL)
8417 && !((h->elf.root.type == bfd_link_hash_defined
8418 || h->elf.root.type == bfd_link_hash_defweak)
8419 && h->elf.root.u.def.section->output_section != NULL))
8420 return ppc_stub_none;
8421 }
8422
8423 /* Determine where the call point is. */
8424 location = (input_sec->output_offset
8425 + input_sec->output_section->vma
8426 + rel->r_offset);
8427
8428 branch_offset = destination - location;
8429 r_type = ELF64_R_TYPE (rel->r_info);
8430
8431 /* Determine if a long branch stub is needed. */
8432 max_branch_offset = 1 << 25;
8433 if (r_type != R_PPC64_REL24)
8434 max_branch_offset = 1 << 15;
8435
8436 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8437 /* We need a stub. Figure out whether a long_branch or plt_branch
8438 is needed later. */
8439 return ppc_stub_long_branch;
8440
8441 return ppc_stub_none;
8442 }
8443
8444 /* Build a .plt call stub. */
8445
8446 static inline bfd_byte *
8447 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8448 {
8449 #define PPC_LO(v) ((v) & 0xffff)
8450 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8451 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8452
8453 if (PPC_HA (offset) != 0)
8454 {
8455 if (r != NULL)
8456 {
8457 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8458 r[1].r_offset = r[0].r_offset + 8;
8459 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8460 r[1].r_addend = r[0].r_addend;
8461 if (PPC_HA (offset + 16) != PPC_HA (offset))
8462 {
8463 r[2].r_offset = r[1].r_offset + 4;
8464 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8465 r[2].r_addend = r[0].r_addend;
8466 }
8467 else
8468 {
8469 r[2].r_offset = r[1].r_offset + 8;
8470 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8471 r[2].r_addend = r[0].r_addend + 8;
8472 r[3].r_offset = r[2].r_offset + 4;
8473 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8474 r[3].r_addend = r[0].r_addend + 16;
8475 }
8476 }
8477 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8478 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8479 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8480 if (PPC_HA (offset + 16) != PPC_HA (offset))
8481 {
8482 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8483 offset = 0;
8484 }
8485 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8486 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8487 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8488 bfd_put_32 (obfd, BCTR, p), p += 4;
8489 }
8490 else
8491 {
8492 if (r != NULL)
8493 {
8494 r[0].r_offset += 4;
8495 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8496 if (PPC_HA (offset + 16) != PPC_HA (offset))
8497 {
8498 r[1].r_offset = r[0].r_offset + 4;
8499 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8500 r[1].r_addend = r[0].r_addend;
8501 }
8502 else
8503 {
8504 r[1].r_offset = r[0].r_offset + 8;
8505 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8506 r[1].r_addend = r[0].r_addend + 16;
8507 r[2].r_offset = r[1].r_offset + 4;
8508 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8509 r[2].r_addend = r[0].r_addend + 8;
8510 }
8511 }
8512 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8513 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8514 if (PPC_HA (offset + 16) != PPC_HA (offset))
8515 {
8516 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8517 offset = 0;
8518 }
8519 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8520 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8521 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8522 bfd_put_32 (obfd, BCTR, p), p += 4;
8523 }
8524 return p;
8525 }
8526
8527 static Elf_Internal_Rela *
8528 get_relocs (asection *sec, int count)
8529 {
8530 Elf_Internal_Rela *relocs;
8531 struct bfd_elf_section_data *elfsec_data;
8532
8533 elfsec_data = elf_section_data (sec);
8534 relocs = elfsec_data->relocs;
8535 if (relocs == NULL)
8536 {
8537 bfd_size_type relsize;
8538 relsize = sec->reloc_count * sizeof (*relocs);
8539 relocs = bfd_alloc (sec->owner, relsize);
8540 if (relocs == NULL)
8541 return NULL;
8542 elfsec_data->relocs = relocs;
8543 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
8544 * sizeof (Elf64_External_Rela));
8545 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8546 sec->reloc_count = 0;
8547 }
8548 relocs += sec->reloc_count;
8549 sec->reloc_count += count;
8550 return relocs;
8551 }
8552
8553 static bfd_boolean
8554 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8555 {
8556 struct ppc_stub_hash_entry *stub_entry;
8557 struct ppc_branch_hash_entry *br_entry;
8558 struct bfd_link_info *info;
8559 struct ppc_link_hash_table *htab;
8560 bfd_byte *loc;
8561 bfd_byte *p;
8562 struct plt_entry *ent;
8563 bfd_vma dest, off;
8564 int size;
8565 Elf_Internal_Rela *r;
8566
8567 /* Massage our args to the form they really have. */
8568 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8569 info = in_arg;
8570
8571 htab = ppc_hash_table (info);
8572
8573 /* Make a note of the offset within the stubs for this entry. */
8574 stub_entry->stub_offset = stub_entry->stub_sec->size;
8575 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8576
8577 htab->stub_count[stub_entry->stub_type - 1] += 1;
8578 switch (stub_entry->stub_type)
8579 {
8580 case ppc_stub_long_branch:
8581 case ppc_stub_long_branch_r2off:
8582 /* Branches are relative. This is where we are going to. */
8583 off = dest = (stub_entry->target_value
8584 + stub_entry->target_section->output_offset
8585 + stub_entry->target_section->output_section->vma);
8586
8587 /* And this is where we are coming from. */
8588 off -= (stub_entry->stub_offset
8589 + stub_entry->stub_sec->output_offset
8590 + stub_entry->stub_sec->output_section->vma);
8591
8592 size = 4;
8593 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8594 {
8595 bfd_vma r2off;
8596
8597 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8598 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8599 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8600 loc += 4;
8601 size = 12;
8602 if (PPC_HA (r2off) != 0)
8603 {
8604 size = 16;
8605 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8606 loc += 4;
8607 }
8608 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8609 loc += 4;
8610 off -= size - 4;
8611 }
8612 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8613
8614 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8615 {
8616 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8617 stub_entry->root.string);
8618 htab->stub_error = TRUE;
8619 return FALSE;
8620 }
8621
8622 if (info->emitrelocations)
8623 {
8624 r = get_relocs (stub_entry->stub_sec, 1);
8625 if (r == NULL)
8626 return FALSE;
8627 r->r_offset = loc - stub_entry->stub_sec->contents;
8628 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8629 r->r_addend = dest;
8630 if (stub_entry->h != NULL)
8631 {
8632 struct elf_link_hash_entry **hashes;
8633 unsigned long symndx;
8634 struct ppc_link_hash_entry *h;
8635
8636 hashes = elf_sym_hashes (htab->stub_bfd);
8637 if (hashes == NULL)
8638 {
8639 bfd_size_type hsize;
8640
8641 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8642 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8643 if (hashes == NULL)
8644 return FALSE;
8645 elf_sym_hashes (htab->stub_bfd) = hashes;
8646 htab->stub_globals = 1;
8647 }
8648 symndx = htab->stub_globals++;
8649 h = stub_entry->h;
8650 hashes[symndx] = &h->elf;
8651 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8652 if (h->oh != NULL && h->oh->is_func)
8653 h = h->oh;
8654 if (h->elf.root.u.def.section != stub_entry->target_section)
8655 /* H is an opd symbol. The addend must be zero. */
8656 r->r_addend = 0;
8657 else
8658 {
8659 off = (h->elf.root.u.def.value
8660 + h->elf.root.u.def.section->output_offset
8661 + h->elf.root.u.def.section->output_section->vma);
8662 r->r_addend -= off;
8663 }
8664 }
8665 }
8666 break;
8667
8668 case ppc_stub_plt_branch:
8669 case ppc_stub_plt_branch_r2off:
8670 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8671 stub_entry->root.string + 9,
8672 FALSE, FALSE);
8673 if (br_entry == NULL)
8674 {
8675 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8676 stub_entry->root.string);
8677 htab->stub_error = TRUE;
8678 return FALSE;
8679 }
8680
8681 dest = (stub_entry->target_value
8682 + stub_entry->target_section->output_offset
8683 + stub_entry->target_section->output_section->vma);
8684
8685 bfd_put_64 (htab->brlt->owner, dest,
8686 htab->brlt->contents + br_entry->offset);
8687
8688 if (br_entry->iter == htab->stub_iteration)
8689 {
8690 br_entry->iter = 0;
8691
8692 if (htab->relbrlt != NULL)
8693 {
8694 /* Create a reloc for the branch lookup table entry. */
8695 Elf_Internal_Rela rela;
8696 bfd_byte *rl;
8697
8698 rela.r_offset = (br_entry->offset
8699 + htab->brlt->output_offset
8700 + htab->brlt->output_section->vma);
8701 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8702 rela.r_addend = dest;
8703
8704 rl = htab->relbrlt->contents;
8705 rl += (htab->relbrlt->reloc_count++
8706 * sizeof (Elf64_External_Rela));
8707 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8708 }
8709 else if (info->emitrelocations)
8710 {
8711 r = get_relocs (htab->brlt, 1);
8712 if (r == NULL)
8713 return FALSE;
8714 /* brlt, being SEC_LINKER_CREATED does not go through the
8715 normal reloc processing. Symbols and offsets are not
8716 translated from input file to output file form, so
8717 set up the offset per the output file. */
8718 r->r_offset = (br_entry->offset
8719 + htab->brlt->output_offset
8720 + htab->brlt->output_section->vma);
8721 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8722 r->r_addend = dest;
8723 }
8724 }
8725
8726 dest = (br_entry->offset
8727 + htab->brlt->output_offset
8728 + htab->brlt->output_section->vma);
8729
8730 off = (dest
8731 - elf_gp (htab->brlt->output_section->owner)
8732 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8733
8734 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8735 {
8736 (*_bfd_error_handler)
8737 (_("linkage table error against `%s'"),
8738 stub_entry->root.string);
8739 bfd_set_error (bfd_error_bad_value);
8740 htab->stub_error = TRUE;
8741 return FALSE;
8742 }
8743
8744 if (info->emitrelocations)
8745 {
8746 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
8747 if (r == NULL)
8748 return FALSE;
8749 r[0].r_offset = loc - stub_entry->stub_sec->contents;
8750 if (bfd_big_endian (info->output_bfd))
8751 r[0].r_offset += 2;
8752 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
8753 r[0].r_offset += 4;
8754 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8755 r[0].r_addend = dest;
8756 if (PPC_HA (off) != 0)
8757 {
8758 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8759 r[1].r_offset = r[0].r_offset + 4;
8760 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8761 r[1].r_addend = r[0].r_addend;
8762 }
8763 }
8764
8765 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8766 {
8767 if (PPC_HA (off) != 0)
8768 {
8769 size = 16;
8770 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
8771 loc += 4;
8772 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
8773 }
8774 else
8775 {
8776 size = 12;
8777 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
8778 }
8779 }
8780 else
8781 {
8782 bfd_vma r2off;
8783
8784 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8785 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8786 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8787 loc += 4;
8788 size = 20;
8789 if (PPC_HA (off) != 0)
8790 {
8791 size += 4;
8792 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
8793 loc += 4;
8794 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
8795 loc += 4;
8796 }
8797 else
8798 {
8799 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
8800 loc += 4;
8801 }
8802
8803 if (PPC_HA (r2off) != 0)
8804 {
8805 size += 4;
8806 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8807 loc += 4;
8808 }
8809 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8810 }
8811 loc += 4;
8812 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8813 loc += 4;
8814 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8815 break;
8816
8817 case ppc_stub_plt_call:
8818 /* Do the best we can for shared libraries built without
8819 exporting ".foo" for each "foo". This can happen when symbol
8820 versioning scripts strip all bar a subset of symbols. */
8821 if (stub_entry->h->oh != NULL
8822 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8823 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8824 {
8825 /* Point the symbol at the stub. There may be multiple stubs,
8826 we don't really care; The main thing is to make this sym
8827 defined somewhere. Maybe defining the symbol in the stub
8828 section is a silly idea. If we didn't do this, htab->top_id
8829 could disappear. */
8830 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8831 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8832 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8833 }
8834
8835 /* Now build the stub. */
8836 dest = (bfd_vma) -1;
8837 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8838 if (ent->addend == stub_entry->addend)
8839 {
8840 dest = ent->plt.offset;
8841 break;
8842 }
8843 if (dest >= (bfd_vma) -2)
8844 abort ();
8845
8846 dest &= ~ (bfd_vma) 1;
8847 dest += (htab->plt->output_offset
8848 + htab->plt->output_section->vma);
8849
8850 off = (dest
8851 - elf_gp (htab->plt->output_section->owner)
8852 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8853
8854 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8855 {
8856 (*_bfd_error_handler)
8857 (_("linkage table error against `%s'"),
8858 stub_entry->h->elf.root.root.string);
8859 bfd_set_error (bfd_error_bad_value);
8860 htab->stub_error = TRUE;
8861 return FALSE;
8862 }
8863
8864 r = NULL;
8865 if (info->emitrelocations)
8866 {
8867 r = get_relocs (stub_entry->stub_sec,
8868 (2 + (PPC_HA (off) != 0)
8869 + (PPC_HA (off + 16) == PPC_HA (off))));
8870 if (r == NULL)
8871 return FALSE;
8872 r[0].r_offset = loc - stub_entry->stub_sec->contents;
8873 if (bfd_big_endian (info->output_bfd))
8874 r[0].r_offset += 2;
8875 r[0].r_addend = dest;
8876 }
8877 p = build_plt_stub (htab->stub_bfd, loc, off, r);
8878 size = p - loc;
8879 break;
8880
8881 default:
8882 BFD_FAIL ();
8883 return FALSE;
8884 }
8885
8886 stub_entry->stub_sec->size += size;
8887
8888 if (htab->emit_stub_syms)
8889 {
8890 struct elf_link_hash_entry *h;
8891 size_t len1, len2;
8892 char *name;
8893 const char *const stub_str[] = { "long_branch",
8894 "long_branch_r2off",
8895 "plt_branch",
8896 "plt_branch_r2off",
8897 "plt_call" };
8898
8899 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8900 len2 = strlen (stub_entry->root.string);
8901 name = bfd_malloc (len1 + len2 + 2);
8902 if (name == NULL)
8903 return FALSE;
8904 memcpy (name, stub_entry->root.string, 9);
8905 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8906 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8907 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8908 if (h == NULL)
8909 return FALSE;
8910 if (h->root.type == bfd_link_hash_new)
8911 {
8912 h->root.type = bfd_link_hash_defined;
8913 h->root.u.def.section = stub_entry->stub_sec;
8914 h->root.u.def.value = stub_entry->stub_offset;
8915 h->ref_regular = 1;
8916 h->def_regular = 1;
8917 h->ref_regular_nonweak = 1;
8918 h->forced_local = 1;
8919 h->non_elf = 0;
8920 }
8921 }
8922
8923 return TRUE;
8924 }
8925
8926 /* As above, but don't actually build the stub. Just bump offset so
8927 we know stub section sizes, and select plt_branch stubs where
8928 long_branch stubs won't do. */
8929
8930 static bfd_boolean
8931 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8932 {
8933 struct ppc_stub_hash_entry *stub_entry;
8934 struct bfd_link_info *info;
8935 struct ppc_link_hash_table *htab;
8936 bfd_vma off;
8937 int size;
8938
8939 /* Massage our args to the form they really have. */
8940 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8941 info = in_arg;
8942
8943 htab = ppc_hash_table (info);
8944
8945 if (stub_entry->stub_type == ppc_stub_plt_call)
8946 {
8947 struct plt_entry *ent;
8948 off = (bfd_vma) -1;
8949 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8950 if (ent->addend == stub_entry->addend)
8951 {
8952 off = ent->plt.offset & ~(bfd_vma) 1;
8953 break;
8954 }
8955 if (off >= (bfd_vma) -2)
8956 abort ();
8957 off += (htab->plt->output_offset
8958 + htab->plt->output_section->vma
8959 - elf_gp (htab->plt->output_section->owner)
8960 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8961
8962 size = PLT_CALL_STUB_SIZE;
8963 if (PPC_HA (off) == 0)
8964 size -= 4;
8965 if (PPC_HA (off + 16) != PPC_HA (off))
8966 size += 4;
8967 if (info->emitrelocations)
8968 {
8969 stub_entry->stub_sec->reloc_count
8970 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
8971 stub_entry->stub_sec->flags |= SEC_RELOC;
8972 }
8973 }
8974 else
8975 {
8976 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8977 variants. */
8978 bfd_vma r2off = 0;
8979
8980 off = (stub_entry->target_value
8981 + stub_entry->target_section->output_offset
8982 + stub_entry->target_section->output_section->vma);
8983 off -= (stub_entry->stub_sec->size
8984 + stub_entry->stub_sec->output_offset
8985 + stub_entry->stub_sec->output_section->vma);
8986
8987 /* Reset the stub type from the plt variant in case we now
8988 can reach with a shorter stub. */
8989 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8990 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8991
8992 size = 4;
8993 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8994 {
8995 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8996 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8997 size = 12;
8998 if (PPC_HA (r2off) != 0)
8999 size = 16;
9000 off -= size - 4;
9001 }
9002
9003 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9004 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9005 {
9006 struct ppc_branch_hash_entry *br_entry;
9007
9008 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9009 stub_entry->root.string + 9,
9010 TRUE, FALSE);
9011 if (br_entry == NULL)
9012 {
9013 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9014 stub_entry->root.string);
9015 htab->stub_error = TRUE;
9016 return FALSE;
9017 }
9018
9019 if (br_entry->iter != htab->stub_iteration)
9020 {
9021 br_entry->iter = htab->stub_iteration;
9022 br_entry->offset = htab->brlt->size;
9023 htab->brlt->size += 8;
9024
9025 if (htab->relbrlt != NULL)
9026 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9027 else if (info->emitrelocations)
9028 {
9029 htab->brlt->reloc_count += 1;
9030 htab->brlt->flags |= SEC_RELOC;
9031 }
9032 }
9033
9034 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9035 off = (br_entry->offset
9036 + htab->brlt->output_offset
9037 + htab->brlt->output_section->vma
9038 - elf_gp (htab->brlt->output_section->owner)
9039 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9040
9041 if (info->emitrelocations)
9042 {
9043 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9044 stub_entry->stub_sec->flags |= SEC_RELOC;
9045 }
9046
9047 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9048 {
9049 size = 12;
9050 if (PPC_HA (off) != 0)
9051 size = 16;
9052 }
9053 else
9054 {
9055 size = 20;
9056 if (PPC_HA (off) != 0)
9057 size += 4;
9058
9059 if (PPC_HA (r2off) != 0)
9060 size += 4;
9061 }
9062 }
9063 else if (info->emitrelocations)
9064 {
9065 stub_entry->stub_sec->reloc_count += 1;
9066 stub_entry->stub_sec->flags |= SEC_RELOC;
9067 }
9068 }
9069
9070 stub_entry->stub_sec->size += size;
9071 return TRUE;
9072 }
9073
9074 /* Set up various things so that we can make a list of input sections
9075 for each output section included in the link. Returns -1 on error,
9076 0 when no stubs will be needed, and 1 on success. */
9077
9078 int
9079 ppc64_elf_setup_section_lists (bfd *output_bfd,
9080 struct bfd_link_info *info,
9081 int no_multi_toc)
9082 {
9083 bfd *input_bfd;
9084 int top_id, top_index, id;
9085 asection *section;
9086 asection **input_list;
9087 bfd_size_type amt;
9088 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9089
9090 htab->no_multi_toc = no_multi_toc;
9091
9092 if (htab->brlt == NULL)
9093 return 0;
9094
9095 /* Find the top input section id. */
9096 for (input_bfd = info->input_bfds, top_id = 3;
9097 input_bfd != NULL;
9098 input_bfd = input_bfd->link_next)
9099 {
9100 for (section = input_bfd->sections;
9101 section != NULL;
9102 section = section->next)
9103 {
9104 if (top_id < section->id)
9105 top_id = section->id;
9106 }
9107 }
9108
9109 htab->top_id = top_id;
9110 amt = sizeof (struct map_stub) * (top_id + 1);
9111 htab->stub_group = bfd_zmalloc (amt);
9112 if (htab->stub_group == NULL)
9113 return -1;
9114
9115 /* Set toc_off for com, und, abs and ind sections. */
9116 for (id = 0; id < 3; id++)
9117 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9118
9119 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9120
9121 /* We can't use output_bfd->section_count here to find the top output
9122 section index as some sections may have been removed, and
9123 strip_excluded_output_sections doesn't renumber the indices. */
9124 for (section = output_bfd->sections, top_index = 0;
9125 section != NULL;
9126 section = section->next)
9127 {
9128 if (top_index < section->index)
9129 top_index = section->index;
9130 }
9131
9132 htab->top_index = top_index;
9133 amt = sizeof (asection *) * (top_index + 1);
9134 input_list = bfd_zmalloc (amt);
9135 htab->input_list = input_list;
9136 if (input_list == NULL)
9137 return -1;
9138
9139 return 1;
9140 }
9141
9142 /* The linker repeatedly calls this function for each TOC input section
9143 and linker generated GOT section. Group input bfds such that the toc
9144 within a group is less than 64k in size. Will break with cute linker
9145 scripts that play games with dot in the output toc section. */
9146
9147 void
9148 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9149 {
9150 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9151
9152 if (!htab->no_multi_toc)
9153 {
9154 bfd_vma addr = isec->output_offset + isec->output_section->vma;
9155 bfd_vma off = addr - htab->toc_curr;
9156
9157 if (off + isec->size > 0x10000)
9158 htab->toc_curr = addr;
9159
9160 elf_gp (isec->owner) = (htab->toc_curr
9161 - elf_gp (isec->output_section->owner)
9162 + TOC_BASE_OFF);
9163 }
9164 }
9165
9166 /* Called after the last call to the above function. */
9167
9168 void
9169 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9170 {
9171 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9172
9173 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9174
9175 /* toc_curr tracks the TOC offset used for code sections below in
9176 ppc64_elf_next_input_section. Start off at 0x8000. */
9177 htab->toc_curr = TOC_BASE_OFF;
9178 }
9179
9180 /* No toc references were found in ISEC. If the code in ISEC makes no
9181 calls, then there's no need to use toc adjusting stubs when branching
9182 into ISEC. Actually, indirect calls from ISEC are OK as they will
9183 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9184 needed, and 2 if a cyclical call-graph was found but no other reason
9185 for a stub was detected. If called from the top level, a return of
9186 2 means the same as a return of 0. */
9187
9188 static int
9189 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9190 {
9191 Elf_Internal_Rela *relstart, *rel;
9192 Elf_Internal_Sym *local_syms;
9193 int ret;
9194 struct ppc_link_hash_table *htab;
9195
9196 /* We know none of our code bearing sections will need toc stubs. */
9197 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9198 return 0;
9199
9200 if (isec->size == 0)
9201 return 0;
9202
9203 if (isec->output_section == NULL)
9204 return 0;
9205
9206 if (isec->reloc_count == 0)
9207 return 0;
9208
9209 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9210 info->keep_memory);
9211 if (relstart == NULL)
9212 return -1;
9213
9214 /* Look for branches to outside of this section. */
9215 local_syms = NULL;
9216 ret = 0;
9217 htab = ppc_hash_table (info);
9218 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9219 {
9220 enum elf_ppc64_reloc_type r_type;
9221 unsigned long r_symndx;
9222 struct elf_link_hash_entry *h;
9223 struct ppc_link_hash_entry *eh;
9224 Elf_Internal_Sym *sym;
9225 asection *sym_sec;
9226 struct _opd_sec_data *opd;
9227 bfd_vma sym_value;
9228 bfd_vma dest;
9229
9230 r_type = ELF64_R_TYPE (rel->r_info);
9231 if (r_type != R_PPC64_REL24
9232 && r_type != R_PPC64_REL14
9233 && r_type != R_PPC64_REL14_BRTAKEN
9234 && r_type != R_PPC64_REL14_BRNTAKEN)
9235 continue;
9236
9237 r_symndx = ELF64_R_SYM (rel->r_info);
9238 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9239 isec->owner))
9240 {
9241 ret = -1;
9242 break;
9243 }
9244
9245 /* Calls to dynamic lib functions go through a plt call stub
9246 that uses r2. */
9247 eh = (struct ppc_link_hash_entry *) h;
9248 if (eh != NULL
9249 && (eh->elf.plt.plist != NULL
9250 || (eh->oh != NULL
9251 && eh->oh->elf.plt.plist != NULL)))
9252 {
9253 ret = 1;
9254 break;
9255 }
9256
9257 if (sym_sec == NULL)
9258 /* Ignore other undefined symbols. */
9259 continue;
9260
9261 /* Assume branches to other sections not included in the link need
9262 stubs too, to cover -R and absolute syms. */
9263 if (sym_sec->output_section == NULL)
9264 {
9265 ret = 1;
9266 break;
9267 }
9268
9269 if (h == NULL)
9270 sym_value = sym->st_value;
9271 else
9272 {
9273 if (h->root.type != bfd_link_hash_defined
9274 && h->root.type != bfd_link_hash_defweak)
9275 abort ();
9276 sym_value = h->root.u.def.value;
9277 }
9278 sym_value += rel->r_addend;
9279
9280 /* If this branch reloc uses an opd sym, find the code section. */
9281 opd = get_opd_info (sym_sec);
9282 if (opd != NULL)
9283 {
9284 if (h == NULL && opd->adjust != NULL)
9285 {
9286 long adjust;
9287
9288 adjust = opd->adjust[sym->st_value / 8];
9289 if (adjust == -1)
9290 /* Assume deleted functions won't ever be called. */
9291 continue;
9292 sym_value += adjust;
9293 }
9294
9295 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9296 if (dest == (bfd_vma) -1)
9297 continue;
9298 }
9299 else
9300 dest = (sym_value
9301 + sym_sec->output_offset
9302 + sym_sec->output_section->vma);
9303
9304 /* Ignore branch to self. */
9305 if (sym_sec == isec)
9306 continue;
9307
9308 /* If the called function uses the toc, we need a stub. */
9309 if (sym_sec->has_toc_reloc
9310 || sym_sec->makes_toc_func_call)
9311 {
9312 ret = 1;
9313 break;
9314 }
9315
9316 /* Assume any branch that needs a long branch stub might in fact
9317 need a plt_branch stub. A plt_branch stub uses r2. */
9318 else if (dest - (isec->output_offset
9319 + isec->output_section->vma
9320 + rel->r_offset) + (1 << 25) >= (2 << 25))
9321 {
9322 ret = 1;
9323 break;
9324 }
9325
9326 /* If calling back to a section in the process of being tested, we
9327 can't say for sure that no toc adjusting stubs are needed, so
9328 don't return zero. */
9329 else if (sym_sec->call_check_in_progress)
9330 ret = 2;
9331
9332 /* Branches to another section that itself doesn't have any TOC
9333 references are OK. Recursively call ourselves to check. */
9334 else if (sym_sec->id <= htab->top_id
9335 && htab->stub_group[sym_sec->id].toc_off == 0)
9336 {
9337 int recur;
9338
9339 /* Mark current section as indeterminate, so that other
9340 sections that call back to current won't be marked as
9341 known. */
9342 isec->call_check_in_progress = 1;
9343 recur = toc_adjusting_stub_needed (info, sym_sec);
9344 isec->call_check_in_progress = 0;
9345
9346 if (recur < 0)
9347 {
9348 /* An error. Exit. */
9349 ret = -1;
9350 break;
9351 }
9352 else if (recur <= 1)
9353 {
9354 /* Known result. Mark as checked and set section flag. */
9355 htab->stub_group[sym_sec->id].toc_off = 1;
9356 if (recur != 0)
9357 {
9358 sym_sec->makes_toc_func_call = 1;
9359 ret = 1;
9360 break;
9361 }
9362 }
9363 else
9364 {
9365 /* Unknown result. Continue checking. */
9366 ret = 2;
9367 }
9368 }
9369 }
9370
9371 if (local_syms != NULL
9372 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9373 free (local_syms);
9374 if (elf_section_data (isec)->relocs != relstart)
9375 free (relstart);
9376
9377 return ret;
9378 }
9379
9380 /* The linker repeatedly calls this function for each input section,
9381 in the order that input sections are linked into output sections.
9382 Build lists of input sections to determine groupings between which
9383 we may insert linker stubs. */
9384
9385 bfd_boolean
9386 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9387 {
9388 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9389
9390 if ((isec->output_section->flags & SEC_CODE) != 0
9391 && isec->output_section->index <= htab->top_index)
9392 {
9393 asection **list = htab->input_list + isec->output_section->index;
9394 /* Steal the link_sec pointer for our list. */
9395 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9396 /* This happens to make the list in reverse order,
9397 which is what we want. */
9398 PREV_SEC (isec) = *list;
9399 *list = isec;
9400 }
9401
9402 if (htab->multi_toc_needed)
9403 {
9404 /* If a code section has a function that uses the TOC then we need
9405 to use the right TOC (obviously). Also, make sure that .opd gets
9406 the correct TOC value for R_PPC64_TOC relocs that don't have or
9407 can't find their function symbol (shouldn't ever happen now).
9408 Also specially treat .fixup for the linux kernel. .fixup
9409 contains branches, but only back to the function that hit an
9410 exception. */
9411 if (isec->has_toc_reloc
9412 || (isec->flags & SEC_CODE) == 0
9413 || strcmp (isec->name, ".fixup") == 0)
9414 {
9415 if (elf_gp (isec->owner) != 0)
9416 htab->toc_curr = elf_gp (isec->owner);
9417 }
9418 else if (htab->stub_group[isec->id].toc_off == 0)
9419 {
9420 int ret = toc_adjusting_stub_needed (info, isec);
9421 if (ret < 0)
9422 return FALSE;
9423 else
9424 isec->makes_toc_func_call = ret & 1;
9425 }
9426 }
9427
9428 /* Functions that don't use the TOC can belong in any TOC group.
9429 Use the last TOC base. This happens to make _init and _fini
9430 pasting work. */
9431 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9432 return TRUE;
9433 }
9434
9435 /* See whether we can group stub sections together. Grouping stub
9436 sections may result in fewer stubs. More importantly, we need to
9437 put all .init* and .fini* stubs at the beginning of the .init or
9438 .fini output sections respectively, because glibc splits the
9439 _init and _fini functions into multiple parts. Putting a stub in
9440 the middle of a function is not a good idea. */
9441
9442 static void
9443 group_sections (struct ppc_link_hash_table *htab,
9444 bfd_size_type stub_group_size,
9445 bfd_boolean stubs_always_before_branch)
9446 {
9447 asection **list;
9448 bfd_size_type stub14_group_size;
9449 bfd_boolean suppress_size_errors;
9450
9451 suppress_size_errors = FALSE;
9452 stub14_group_size = stub_group_size;
9453 if (stub_group_size == 1)
9454 {
9455 /* Default values. */
9456 if (stubs_always_before_branch)
9457 {
9458 stub_group_size = 0x1e00000;
9459 stub14_group_size = 0x7800;
9460 }
9461 else
9462 {
9463 stub_group_size = 0x1c00000;
9464 stub14_group_size = 0x7000;
9465 }
9466 suppress_size_errors = TRUE;
9467 }
9468
9469 list = htab->input_list + htab->top_index;
9470 do
9471 {
9472 asection *tail = *list;
9473 while (tail != NULL)
9474 {
9475 asection *curr;
9476 asection *prev;
9477 bfd_size_type total;
9478 bfd_boolean big_sec;
9479 bfd_vma curr_toc;
9480
9481 curr = tail;
9482 total = tail->size;
9483 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9484 ? stub14_group_size : stub_group_size);
9485 if (big_sec && !suppress_size_errors)
9486 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9487 tail->owner, tail);
9488 curr_toc = htab->stub_group[tail->id].toc_off;
9489
9490 while ((prev = PREV_SEC (curr)) != NULL
9491 && ((total += curr->output_offset - prev->output_offset)
9492 < (ppc64_elf_section_data (prev)->has_14bit_branch
9493 ? stub14_group_size : stub_group_size))
9494 && htab->stub_group[prev->id].toc_off == curr_toc)
9495 curr = prev;
9496
9497 /* OK, the size from the start of CURR to the end is less
9498 than stub_group_size and thus can be handled by one stub
9499 section. (or the tail section is itself larger than
9500 stub_group_size, in which case we may be toast.) We
9501 should really be keeping track of the total size of stubs
9502 added here, as stubs contribute to the final output
9503 section size. That's a little tricky, and this way will
9504 only break if stubs added make the total size more than
9505 2^25, ie. for the default stub_group_size, if stubs total
9506 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9507 do
9508 {
9509 prev = PREV_SEC (tail);
9510 /* Set up this stub group. */
9511 htab->stub_group[tail->id].link_sec = curr;
9512 }
9513 while (tail != curr && (tail = prev) != NULL);
9514
9515 /* But wait, there's more! Input sections up to stub_group_size
9516 bytes before the stub section can be handled by it too.
9517 Don't do this if we have a really large section after the
9518 stubs, as adding more stubs increases the chance that
9519 branches may not reach into the stub section. */
9520 if (!stubs_always_before_branch && !big_sec)
9521 {
9522 total = 0;
9523 while (prev != NULL
9524 && ((total += tail->output_offset - prev->output_offset)
9525 < (ppc64_elf_section_data (prev)->has_14bit_branch
9526 ? stub14_group_size : stub_group_size))
9527 && htab->stub_group[prev->id].toc_off == curr_toc)
9528 {
9529 tail = prev;
9530 prev = PREV_SEC (tail);
9531 htab->stub_group[tail->id].link_sec = curr;
9532 }
9533 }
9534 tail = prev;
9535 }
9536 }
9537 while (list-- != htab->input_list);
9538 free (htab->input_list);
9539 #undef PREV_SEC
9540 }
9541
9542 /* Determine and set the size of the stub section for a final link.
9543
9544 The basic idea here is to examine all the relocations looking for
9545 PC-relative calls to a target that is unreachable with a "bl"
9546 instruction. */
9547
9548 bfd_boolean
9549 ppc64_elf_size_stubs (bfd *output_bfd,
9550 struct bfd_link_info *info,
9551 bfd_signed_vma group_size,
9552 asection *(*add_stub_section) (const char *, asection *),
9553 void (*layout_sections_again) (void))
9554 {
9555 bfd_size_type stub_group_size;
9556 bfd_boolean stubs_always_before_branch;
9557 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9558
9559 /* Stash our params away. */
9560 htab->add_stub_section = add_stub_section;
9561 htab->layout_sections_again = layout_sections_again;
9562 stubs_always_before_branch = group_size < 0;
9563 if (group_size < 0)
9564 stub_group_size = -group_size;
9565 else
9566 stub_group_size = group_size;
9567
9568 group_sections (htab, stub_group_size, stubs_always_before_branch);
9569
9570 while (1)
9571 {
9572 bfd *input_bfd;
9573 unsigned int bfd_indx;
9574 asection *stub_sec;
9575
9576 htab->stub_iteration += 1;
9577
9578 for (input_bfd = info->input_bfds, bfd_indx = 0;
9579 input_bfd != NULL;
9580 input_bfd = input_bfd->link_next, bfd_indx++)
9581 {
9582 Elf_Internal_Shdr *symtab_hdr;
9583 asection *section;
9584 Elf_Internal_Sym *local_syms = NULL;
9585
9586 if (!is_ppc64_elf (input_bfd))
9587 continue;
9588
9589 /* We'll need the symbol table in a second. */
9590 symtab_hdr = &elf_symtab_hdr (input_bfd);
9591 if (symtab_hdr->sh_info == 0)
9592 continue;
9593
9594 /* Walk over each section attached to the input bfd. */
9595 for (section = input_bfd->sections;
9596 section != NULL;
9597 section = section->next)
9598 {
9599 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9600
9601 /* If there aren't any relocs, then there's nothing more
9602 to do. */
9603 if ((section->flags & SEC_RELOC) == 0
9604 || (section->flags & SEC_ALLOC) == 0
9605 || (section->flags & SEC_LOAD) == 0
9606 || (section->flags & SEC_CODE) == 0
9607 || section->reloc_count == 0)
9608 continue;
9609
9610 /* If this section is a link-once section that will be
9611 discarded, then don't create any stubs. */
9612 if (section->output_section == NULL
9613 || section->output_section->owner != output_bfd)
9614 continue;
9615
9616 /* Get the relocs. */
9617 internal_relocs
9618 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9619 info->keep_memory);
9620 if (internal_relocs == NULL)
9621 goto error_ret_free_local;
9622
9623 /* Now examine each relocation. */
9624 irela = internal_relocs;
9625 irelaend = irela + section->reloc_count;
9626 for (; irela < irelaend; irela++)
9627 {
9628 enum elf_ppc64_reloc_type r_type;
9629 unsigned int r_indx;
9630 enum ppc_stub_type stub_type;
9631 struct ppc_stub_hash_entry *stub_entry;
9632 asection *sym_sec, *code_sec;
9633 bfd_vma sym_value;
9634 bfd_vma destination;
9635 bfd_boolean ok_dest;
9636 struct ppc_link_hash_entry *hash;
9637 struct ppc_link_hash_entry *fdh;
9638 struct elf_link_hash_entry *h;
9639 Elf_Internal_Sym *sym;
9640 char *stub_name;
9641 const asection *id_sec;
9642 struct _opd_sec_data *opd;
9643
9644 r_type = ELF64_R_TYPE (irela->r_info);
9645 r_indx = ELF64_R_SYM (irela->r_info);
9646
9647 if (r_type >= R_PPC64_max)
9648 {
9649 bfd_set_error (bfd_error_bad_value);
9650 goto error_ret_free_internal;
9651 }
9652
9653 /* Only look for stubs on branch instructions. */
9654 if (r_type != R_PPC64_REL24
9655 && r_type != R_PPC64_REL14
9656 && r_type != R_PPC64_REL14_BRTAKEN
9657 && r_type != R_PPC64_REL14_BRNTAKEN)
9658 continue;
9659
9660 /* Now determine the call target, its name, value,
9661 section. */
9662 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9663 r_indx, input_bfd))
9664 goto error_ret_free_internal;
9665 hash = (struct ppc_link_hash_entry *) h;
9666
9667 ok_dest = FALSE;
9668 fdh = NULL;
9669 sym_value = 0;
9670 if (hash == NULL)
9671 {
9672 sym_value = sym->st_value;
9673 ok_dest = TRUE;
9674 }
9675 else if (hash->elf.root.type == bfd_link_hash_defined
9676 || hash->elf.root.type == bfd_link_hash_defweak)
9677 {
9678 sym_value = hash->elf.root.u.def.value;
9679 if (sym_sec->output_section != NULL)
9680 ok_dest = TRUE;
9681 }
9682 else if (hash->elf.root.type == bfd_link_hash_undefweak
9683 || hash->elf.root.type == bfd_link_hash_undefined)
9684 {
9685 /* Recognise an old ABI func code entry sym, and
9686 use the func descriptor sym instead if it is
9687 defined. */
9688 if (hash->elf.root.root.string[0] == '.'
9689 && (fdh = get_fdh (hash, htab)) != NULL)
9690 {
9691 if (fdh->elf.root.type == bfd_link_hash_defined
9692 || fdh->elf.root.type == bfd_link_hash_defweak)
9693 {
9694 sym_sec = fdh->elf.root.u.def.section;
9695 sym_value = fdh->elf.root.u.def.value;
9696 if (sym_sec->output_section != NULL)
9697 ok_dest = TRUE;
9698 }
9699 else
9700 fdh = NULL;
9701 }
9702 }
9703 else
9704 {
9705 bfd_set_error (bfd_error_bad_value);
9706 goto error_ret_free_internal;
9707 }
9708
9709 destination = 0;
9710 if (ok_dest)
9711 {
9712 sym_value += irela->r_addend;
9713 destination = (sym_value
9714 + sym_sec->output_offset
9715 + sym_sec->output_section->vma);
9716 }
9717
9718 code_sec = sym_sec;
9719 opd = get_opd_info (sym_sec);
9720 if (opd != NULL)
9721 {
9722 bfd_vma dest;
9723
9724 if (hash == NULL && opd->adjust != NULL)
9725 {
9726 long adjust = opd->adjust[sym_value / 8];
9727 if (adjust == -1)
9728 continue;
9729 sym_value += adjust;
9730 }
9731 dest = opd_entry_value (sym_sec, sym_value,
9732 &code_sec, &sym_value);
9733 if (dest != (bfd_vma) -1)
9734 {
9735 destination = dest;
9736 if (fdh != NULL)
9737 {
9738 /* Fixup old ABI sym to point at code
9739 entry. */
9740 hash->elf.root.type = bfd_link_hash_defweak;
9741 hash->elf.root.u.def.section = code_sec;
9742 hash->elf.root.u.def.value = sym_value;
9743 }
9744 }
9745 }
9746
9747 /* Determine what (if any) linker stub is needed. */
9748 stub_type = ppc_type_of_stub (section, irela, &hash,
9749 destination);
9750
9751 if (stub_type != ppc_stub_plt_call)
9752 {
9753 /* Check whether we need a TOC adjusting stub.
9754 Since the linker pastes together pieces from
9755 different object files when creating the
9756 _init and _fini functions, it may be that a
9757 call to what looks like a local sym is in
9758 fact a call needing a TOC adjustment. */
9759 if (code_sec != NULL
9760 && code_sec->output_section != NULL
9761 && (htab->stub_group[code_sec->id].toc_off
9762 != htab->stub_group[section->id].toc_off)
9763 && (code_sec->has_toc_reloc
9764 || code_sec->makes_toc_func_call))
9765 stub_type = ppc_stub_long_branch_r2off;
9766 }
9767
9768 if (stub_type == ppc_stub_none)
9769 continue;
9770
9771 /* __tls_get_addr calls might be eliminated. */
9772 if (stub_type != ppc_stub_plt_call
9773 && hash != NULL
9774 && (hash == htab->tls_get_addr
9775 || hash == htab->tls_get_addr_fd)
9776 && section->has_tls_reloc
9777 && irela != internal_relocs)
9778 {
9779 /* Get tls info. */
9780 char *tls_mask;
9781
9782 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
9783 irela - 1, input_bfd))
9784 goto error_ret_free_internal;
9785 if (*tls_mask != 0)
9786 continue;
9787 }
9788
9789 /* Support for grouping stub sections. */
9790 id_sec = htab->stub_group[section->id].link_sec;
9791
9792 /* Get the name of this stub. */
9793 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9794 if (!stub_name)
9795 goto error_ret_free_internal;
9796
9797 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9798 stub_name, FALSE, FALSE);
9799 if (stub_entry != NULL)
9800 {
9801 /* The proper stub has already been created. */
9802 free (stub_name);
9803 continue;
9804 }
9805
9806 stub_entry = ppc_add_stub (stub_name, section, htab);
9807 if (stub_entry == NULL)
9808 {
9809 free (stub_name);
9810 error_ret_free_internal:
9811 if (elf_section_data (section)->relocs == NULL)
9812 free (internal_relocs);
9813 error_ret_free_local:
9814 if (local_syms != NULL
9815 && (symtab_hdr->contents
9816 != (unsigned char *) local_syms))
9817 free (local_syms);
9818 return FALSE;
9819 }
9820
9821 stub_entry->stub_type = stub_type;
9822 stub_entry->target_value = sym_value;
9823 stub_entry->target_section = code_sec;
9824 stub_entry->h = hash;
9825 stub_entry->addend = irela->r_addend;
9826
9827 if (stub_entry->h != NULL)
9828 htab->stub_globals += 1;
9829 }
9830
9831 /* We're done with the internal relocs, free them. */
9832 if (elf_section_data (section)->relocs != internal_relocs)
9833 free (internal_relocs);
9834 }
9835
9836 if (local_syms != NULL
9837 && symtab_hdr->contents != (unsigned char *) local_syms)
9838 {
9839 if (!info->keep_memory)
9840 free (local_syms);
9841 else
9842 symtab_hdr->contents = (unsigned char *) local_syms;
9843 }
9844 }
9845
9846 /* We may have added some stubs. Find out the new size of the
9847 stub sections. */
9848 for (stub_sec = htab->stub_bfd->sections;
9849 stub_sec != NULL;
9850 stub_sec = stub_sec->next)
9851 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9852 {
9853 stub_sec->rawsize = stub_sec->size;
9854 stub_sec->size = 0;
9855 stub_sec->reloc_count = 0;
9856 stub_sec->flags &= ~SEC_RELOC;
9857 }
9858
9859 htab->brlt->size = 0;
9860 htab->brlt->reloc_count = 0;
9861 htab->brlt->flags &= ~SEC_RELOC;
9862 if (htab->relbrlt != NULL)
9863 htab->relbrlt->size = 0;
9864
9865 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9866
9867 if (info->emitrelocations
9868 && htab->glink != NULL && htab->glink->size != 0)
9869 {
9870 htab->glink->reloc_count = 1;
9871 htab->glink->flags |= SEC_RELOC;
9872 }
9873
9874 for (stub_sec = htab->stub_bfd->sections;
9875 stub_sec != NULL;
9876 stub_sec = stub_sec->next)
9877 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9878 && stub_sec->rawsize != stub_sec->size)
9879 break;
9880
9881 /* Exit from this loop when no stubs have been added, and no stubs
9882 have changed size. */
9883 if (stub_sec == NULL)
9884 break;
9885
9886 /* Ask the linker to do its stuff. */
9887 (*htab->layout_sections_again) ();
9888 }
9889
9890 /* It would be nice to strip htab->brlt from the output if the
9891 section is empty, but it's too late. If we strip sections here,
9892 the dynamic symbol table is corrupted since the section symbol
9893 for the stripped section isn't written. */
9894
9895 return TRUE;
9896 }
9897
9898 /* Called after we have determined section placement. If sections
9899 move, we'll be called again. Provide a value for TOCstart. */
9900
9901 bfd_vma
9902 ppc64_elf_toc (bfd *obfd)
9903 {
9904 asection *s;
9905 bfd_vma TOCstart;
9906
9907 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9908 order. The TOC starts where the first of these sections starts. */
9909 s = bfd_get_section_by_name (obfd, ".got");
9910 if (s == NULL)
9911 s = bfd_get_section_by_name (obfd, ".toc");
9912 if (s == NULL)
9913 s = bfd_get_section_by_name (obfd, ".tocbss");
9914 if (s == NULL)
9915 s = bfd_get_section_by_name (obfd, ".plt");
9916 if (s == NULL)
9917 {
9918 /* This may happen for
9919 o references to TOC base (SYM@toc / TOC[tc0]) without a
9920 .toc directive
9921 o bad linker script
9922 o --gc-sections and empty TOC sections
9923
9924 FIXME: Warn user? */
9925
9926 /* Look for a likely section. We probably won't even be
9927 using TOCstart. */
9928 for (s = obfd->sections; s != NULL; s = s->next)
9929 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9930 == (SEC_ALLOC | SEC_SMALL_DATA))
9931 break;
9932 if (s == NULL)
9933 for (s = obfd->sections; s != NULL; s = s->next)
9934 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9935 == (SEC_ALLOC | SEC_SMALL_DATA))
9936 break;
9937 if (s == NULL)
9938 for (s = obfd->sections; s != NULL; s = s->next)
9939 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9940 break;
9941 if (s == NULL)
9942 for (s = obfd->sections; s != NULL; s = s->next)
9943 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9944 break;
9945 }
9946
9947 TOCstart = 0;
9948 if (s != NULL)
9949 TOCstart = s->output_section->vma + s->output_offset;
9950
9951 return TOCstart;
9952 }
9953
9954 /* Build all the stubs associated with the current output file.
9955 The stubs are kept in a hash table attached to the main linker
9956 hash table. This function is called via gldelf64ppc_finish. */
9957
9958 bfd_boolean
9959 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9960 struct bfd_link_info *info,
9961 char **stats)
9962 {
9963 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9964 asection *stub_sec;
9965 bfd_byte *p;
9966 int stub_sec_count = 0;
9967
9968 htab->emit_stub_syms = emit_stub_syms;
9969
9970 /* Allocate memory to hold the linker stubs. */
9971 for (stub_sec = htab->stub_bfd->sections;
9972 stub_sec != NULL;
9973 stub_sec = stub_sec->next)
9974 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9975 && stub_sec->size != 0)
9976 {
9977 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9978 if (stub_sec->contents == NULL)
9979 return FALSE;
9980 /* We want to check that built size is the same as calculated
9981 size. rawsize is a convenient location to use. */
9982 stub_sec->rawsize = stub_sec->size;
9983 stub_sec->size = 0;
9984 }
9985
9986 if (htab->glink != NULL && htab->glink->size != 0)
9987 {
9988 unsigned int indx;
9989 bfd_vma plt0;
9990
9991 /* Build the .glink plt call stub. */
9992 if (htab->emit_stub_syms)
9993 {
9994 struct elf_link_hash_entry *h;
9995 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
9996 TRUE, FALSE, FALSE);
9997 if (h == NULL)
9998 return FALSE;
9999 if (h->root.type == bfd_link_hash_new)
10000 {
10001 h->root.type = bfd_link_hash_defined;
10002 h->root.u.def.section = htab->glink;
10003 h->root.u.def.value = 8;
10004 h->ref_regular = 1;
10005 h->def_regular = 1;
10006 h->ref_regular_nonweak = 1;
10007 h->forced_local = 1;
10008 h->non_elf = 0;
10009 }
10010 }
10011 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10012 if (info->emitrelocations)
10013 {
10014 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10015 if (r == NULL)
10016 return FALSE;
10017 r->r_offset = (htab->glink->output_offset
10018 + htab->glink->output_section->vma);
10019 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10020 r->r_addend = plt0;
10021 }
10022 p = htab->glink->contents;
10023 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10024 bfd_put_64 (htab->glink->owner, plt0, p);
10025 p += 8;
10026 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
10027 p += 4;
10028 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
10029 p += 4;
10030 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
10031 p += 4;
10032 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
10033 p += 4;
10034 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
10035 p += 4;
10036 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10037 p += 4;
10038 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10039 p += 4;
10040 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10041 p += 4;
10042 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10043 p += 4;
10044 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10045 p += 4;
10046 bfd_put_32 (htab->glink->owner, BCTR, p);
10047 p += 4;
10048 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10049 {
10050 bfd_put_32 (htab->glink->owner, NOP, p);
10051 p += 4;
10052 }
10053
10054 /* Build the .glink lazy link call stubs. */
10055 indx = 0;
10056 while (p < htab->glink->contents + htab->glink->size)
10057 {
10058 if (indx < 0x8000)
10059 {
10060 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10061 p += 4;
10062 }
10063 else
10064 {
10065 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10066 p += 4;
10067 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10068 p += 4;
10069 }
10070 bfd_put_32 (htab->glink->owner,
10071 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10072 indx++;
10073 p += 4;
10074 }
10075 htab->glink->rawsize = p - htab->glink->contents;
10076 }
10077
10078 if (htab->brlt->size != 0)
10079 {
10080 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10081 htab->brlt->size);
10082 if (htab->brlt->contents == NULL)
10083 return FALSE;
10084 }
10085 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10086 {
10087 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10088 htab->relbrlt->size);
10089 if (htab->relbrlt->contents == NULL)
10090 return FALSE;
10091 }
10092
10093 /* Build the stubs as directed by the stub hash table. */
10094 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10095
10096 if (htab->relbrlt != NULL)
10097 htab->relbrlt->reloc_count = 0;
10098
10099 for (stub_sec = htab->stub_bfd->sections;
10100 stub_sec != NULL;
10101 stub_sec = stub_sec->next)
10102 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10103 {
10104 stub_sec_count += 1;
10105 if (stub_sec->rawsize != stub_sec->size)
10106 break;
10107 }
10108
10109 if (stub_sec != NULL
10110 || htab->glink->rawsize != htab->glink->size)
10111 {
10112 htab->stub_error = TRUE;
10113 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10114 }
10115
10116 if (htab->stub_error)
10117 return FALSE;
10118
10119 if (stats != NULL)
10120 {
10121 *stats = bfd_malloc (500);
10122 if (*stats == NULL)
10123 return FALSE;
10124
10125 sprintf (*stats, _("linker stubs in %u group%s\n"
10126 " branch %lu\n"
10127 " toc adjust %lu\n"
10128 " long branch %lu\n"
10129 " long toc adj %lu\n"
10130 " plt call %lu"),
10131 stub_sec_count,
10132 stub_sec_count == 1 ? "" : "s",
10133 htab->stub_count[ppc_stub_long_branch - 1],
10134 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10135 htab->stub_count[ppc_stub_plt_branch - 1],
10136 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10137 htab->stub_count[ppc_stub_plt_call - 1]);
10138 }
10139 return TRUE;
10140 }
10141
10142 /* This function undoes the changes made by add_symbol_adjust. */
10143
10144 static bfd_boolean
10145 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10146 {
10147 struct ppc_link_hash_entry *eh;
10148
10149 if (h->root.type == bfd_link_hash_indirect)
10150 return TRUE;
10151
10152 if (h->root.type == bfd_link_hash_warning)
10153 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10154
10155 eh = (struct ppc_link_hash_entry *) h;
10156 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10157 return TRUE;
10158
10159 eh->elf.root.type = bfd_link_hash_undefined;
10160 return TRUE;
10161 }
10162
10163 void
10164 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10165 {
10166 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10167 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10168 }
10169
10170 /* What to do when ld finds relocations against symbols defined in
10171 discarded sections. */
10172
10173 static unsigned int
10174 ppc64_elf_action_discarded (asection *sec)
10175 {
10176 if (strcmp (".opd", sec->name) == 0)
10177 return 0;
10178
10179 if (strcmp (".toc", sec->name) == 0)
10180 return 0;
10181
10182 if (strcmp (".toc1", sec->name) == 0)
10183 return 0;
10184
10185 return _bfd_elf_default_action_discarded (sec);
10186 }
10187
10188 /* The RELOCATE_SECTION function is called by the ELF backend linker
10189 to handle the relocations for a section.
10190
10191 The relocs are always passed as Rela structures; if the section
10192 actually uses Rel structures, the r_addend field will always be
10193 zero.
10194
10195 This function is responsible for adjust the section contents as
10196 necessary, and (if using Rela relocs and generating a
10197 relocatable output file) adjusting the reloc addend as
10198 necessary.
10199
10200 This function does not have to worry about setting the reloc
10201 address or the reloc symbol index.
10202
10203 LOCAL_SYMS is a pointer to the swapped in local symbols.
10204
10205 LOCAL_SECTIONS is an array giving the section in the input file
10206 corresponding to the st_shndx field of each local symbol.
10207
10208 The global hash table entry for the global symbols can be found
10209 via elf_sym_hashes (input_bfd).
10210
10211 When generating relocatable output, this function must handle
10212 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10213 going to be the section symbol corresponding to the output
10214 section, which means that the addend must be adjusted
10215 accordingly. */
10216
10217 static bfd_boolean
10218 ppc64_elf_relocate_section (bfd *output_bfd,
10219 struct bfd_link_info *info,
10220 bfd *input_bfd,
10221 asection *input_section,
10222 bfd_byte *contents,
10223 Elf_Internal_Rela *relocs,
10224 Elf_Internal_Sym *local_syms,
10225 asection **local_sections)
10226 {
10227 struct ppc_link_hash_table *htab;
10228 Elf_Internal_Shdr *symtab_hdr;
10229 struct elf_link_hash_entry **sym_hashes;
10230 Elf_Internal_Rela *rel;
10231 Elf_Internal_Rela *relend;
10232 Elf_Internal_Rela outrel;
10233 bfd_byte *loc;
10234 struct got_entry **local_got_ents;
10235 bfd_vma TOCstart;
10236 bfd_boolean ret = TRUE;
10237 bfd_boolean is_opd;
10238 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10239 bfd_boolean is_power4 = FALSE;
10240 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10241
10242 /* Initialize howto table if needed. */
10243 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10244 ppc_howto_init ();
10245
10246 htab = ppc_hash_table (info);
10247
10248 /* Don't relocate stub sections. */
10249 if (input_section->owner == htab->stub_bfd)
10250 return TRUE;
10251
10252 BFD_ASSERT (is_ppc64_elf (input_bfd));
10253
10254 local_got_ents = elf_local_got_ents (input_bfd);
10255 TOCstart = elf_gp (output_bfd);
10256 symtab_hdr = &elf_symtab_hdr (input_bfd);
10257 sym_hashes = elf_sym_hashes (input_bfd);
10258 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10259
10260 rel = relocs;
10261 relend = relocs + input_section->reloc_count;
10262 for (; rel < relend; rel++)
10263 {
10264 enum elf_ppc64_reloc_type r_type;
10265 bfd_vma addend, orig_addend;
10266 bfd_reloc_status_type r;
10267 Elf_Internal_Sym *sym;
10268 asection *sec;
10269 struct elf_link_hash_entry *h_elf;
10270 struct ppc_link_hash_entry *h;
10271 struct ppc_link_hash_entry *fdh;
10272 const char *sym_name;
10273 unsigned long r_symndx, toc_symndx;
10274 bfd_vma toc_addend;
10275 char tls_mask, tls_gd, tls_type;
10276 char sym_type;
10277 bfd_vma relocation;
10278 bfd_boolean unresolved_reloc;
10279 bfd_boolean warned;
10280 unsigned long insn, mask;
10281 struct ppc_stub_hash_entry *stub_entry;
10282 bfd_vma max_br_offset;
10283 bfd_vma from;
10284
10285 r_type = ELF64_R_TYPE (rel->r_info);
10286 r_symndx = ELF64_R_SYM (rel->r_info);
10287
10288 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10289 symbol of the previous ADDR64 reloc. The symbol gives us the
10290 proper TOC base to use. */
10291 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10292 && rel != relocs
10293 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10294 && is_opd)
10295 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10296
10297 sym = NULL;
10298 sec = NULL;
10299 h_elf = NULL;
10300 sym_name = NULL;
10301 unresolved_reloc = FALSE;
10302 warned = FALSE;
10303 orig_addend = rel->r_addend;
10304
10305 if (r_symndx < symtab_hdr->sh_info)
10306 {
10307 /* It's a local symbol. */
10308 struct _opd_sec_data *opd;
10309
10310 sym = local_syms + r_symndx;
10311 sec = local_sections[r_symndx];
10312 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10313 sym_type = ELF64_ST_TYPE (sym->st_info);
10314 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10315 opd = get_opd_info (sec);
10316 if (opd != NULL && opd->adjust != NULL)
10317 {
10318 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10319 if (adjust == -1)
10320 relocation = 0;
10321 else
10322 {
10323 /* If this is a relocation against the opd section sym
10324 and we have edited .opd, adjust the reloc addend so
10325 that ld -r and ld --emit-relocs output is correct.
10326 If it is a reloc against some other .opd symbol,
10327 then the symbol value will be adjusted later. */
10328 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10329 rel->r_addend += adjust;
10330 else
10331 relocation += adjust;
10332 }
10333 }
10334 }
10335 else
10336 {
10337 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10338 r_symndx, symtab_hdr, sym_hashes,
10339 h_elf, sec, relocation,
10340 unresolved_reloc, warned);
10341 sym_name = h_elf->root.root.string;
10342 sym_type = h_elf->type;
10343 }
10344 h = (struct ppc_link_hash_entry *) h_elf;
10345
10346 if (sec != NULL && elf_discarded_section (sec))
10347 {
10348 /* For relocs against symbols from removed linkonce sections,
10349 or sections discarded by a linker script, we just want the
10350 section contents zeroed. Avoid any special processing. */
10351 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10352 contents + rel->r_offset);
10353 rel->r_info = 0;
10354 rel->r_addend = 0;
10355 continue;
10356 }
10357
10358 if (info->relocatable)
10359 continue;
10360
10361 /* TLS optimizations. Replace instruction sequences and relocs
10362 based on information we collected in tls_optimize. We edit
10363 RELOCS so that --emit-relocs will output something sensible
10364 for the final instruction stream. */
10365 tls_mask = 0;
10366 tls_gd = 0;
10367 toc_symndx = 0;
10368 if (h != NULL)
10369 tls_mask = h->tls_mask;
10370 else if (local_got_ents != NULL)
10371 {
10372 char *lgot_masks;
10373 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10374 tls_mask = lgot_masks[r_symndx];
10375 }
10376 if (tls_mask == 0
10377 && (r_type == R_PPC64_TLS
10378 || r_type == R_PPC64_TLSGD
10379 || r_type == R_PPC64_TLSLD))
10380 {
10381 /* Check for toc tls entries. */
10382 char *toc_tls;
10383
10384 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10385 &local_syms, rel, input_bfd))
10386 return FALSE;
10387
10388 if (toc_tls)
10389 tls_mask = *toc_tls;
10390 }
10391
10392 /* Check that tls relocs are used with tls syms, and non-tls
10393 relocs are used with non-tls syms. */
10394 if (r_symndx != 0
10395 && r_type != R_PPC64_NONE
10396 && (h == NULL
10397 || h->elf.root.type == bfd_link_hash_defined
10398 || h->elf.root.type == bfd_link_hash_defweak)
10399 && (IS_PPC64_TLS_RELOC (r_type)
10400 != (sym_type == STT_TLS
10401 || (sym_type == STT_SECTION
10402 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10403 {
10404 if (tls_mask != 0
10405 && (r_type == R_PPC64_TLS
10406 || r_type == R_PPC64_TLSGD
10407 || r_type == R_PPC64_TLSLD))
10408 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10409 ;
10410 else
10411 (*_bfd_error_handler)
10412 (!IS_PPC64_TLS_RELOC (r_type)
10413 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10414 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10415 input_bfd,
10416 input_section,
10417 (long) rel->r_offset,
10418 ppc64_elf_howto_table[r_type]->name,
10419 sym_name);
10420 }
10421
10422 /* Ensure reloc mapping code below stays sane. */
10423 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10424 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10425 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10426 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10427 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10428 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10429 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10430 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10431 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10432 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10433 abort ();
10434
10435 switch (r_type)
10436 {
10437 default:
10438 break;
10439
10440 case R_PPC64_TOC16:
10441 case R_PPC64_TOC16_LO:
10442 case R_PPC64_TOC16_DS:
10443 case R_PPC64_TOC16_LO_DS:
10444 {
10445 /* Check for toc tls entries. */
10446 char *toc_tls;
10447 int retval;
10448
10449 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10450 &local_syms, rel, input_bfd);
10451 if (retval == 0)
10452 return FALSE;
10453
10454 if (toc_tls)
10455 {
10456 tls_mask = *toc_tls;
10457 if (r_type == R_PPC64_TOC16_DS
10458 || r_type == R_PPC64_TOC16_LO_DS)
10459 {
10460 if (tls_mask != 0
10461 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10462 goto toctprel;
10463 }
10464 else
10465 {
10466 /* If we found a GD reloc pair, then we might be
10467 doing a GD->IE transition. */
10468 if (retval == 2)
10469 {
10470 tls_gd = TLS_TPRELGD;
10471 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10472 goto tls_ldgd_opt;
10473 }
10474 else if (retval == 3)
10475 {
10476 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10477 goto tls_ldgd_opt;
10478 }
10479 }
10480 }
10481 }
10482 break;
10483
10484 case R_PPC64_GOT_TPREL16_DS:
10485 case R_PPC64_GOT_TPREL16_LO_DS:
10486 if (tls_mask != 0
10487 && (tls_mask & TLS_TPREL) == 0)
10488 {
10489 toctprel:
10490 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10491 insn &= 31 << 21;
10492 insn |= 0x3c0d0000; /* addis 0,13,0 */
10493 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10494 r_type = R_PPC64_TPREL16_HA;
10495 if (toc_symndx != 0)
10496 {
10497 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10498 rel->r_addend = toc_addend;
10499 /* We changed the symbol. Start over in order to
10500 get h, sym, sec etc. right. */
10501 rel--;
10502 continue;
10503 }
10504 else
10505 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10506 }
10507 break;
10508
10509 case R_PPC64_TLS:
10510 if (tls_mask != 0
10511 && (tls_mask & TLS_TPREL) == 0)
10512 {
10513 bfd_vma rtra;
10514 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10515 if ((insn & ((0x3f << 26) | (31 << 11)))
10516 == ((31 << 26) | (13 << 11)))
10517 rtra = insn & ((1 << 26) - (1 << 16));
10518 else if ((insn & ((0x3f << 26) | (31 << 16)))
10519 == ((31 << 26) | (13 << 16)))
10520 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10521 else
10522 abort ();
10523 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10524 /* add -> addi. */
10525 insn = 14 << 26;
10526 else if ((insn & (31 << 1)) == 23 << 1
10527 && ((insn & (31 << 6)) < 14 << 6
10528 || ((insn & (31 << 6)) >= 16 << 6
10529 && (insn & (31 << 6)) < 24 << 6)))
10530 /* load and store indexed -> dform. */
10531 insn = (32 | ((insn >> 6) & 31)) << 26;
10532 else if ((insn & (31 << 1)) == 21 << 1
10533 && (insn & (0x1a << 6)) == 0)
10534 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10535 insn = (((58 | ((insn >> 6) & 4)) << 26)
10536 | ((insn >> 6) & 1));
10537 else if ((insn & (31 << 1)) == 21 << 1
10538 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10539 /* lwax -> lwa. */
10540 insn = (58 << 26) | 2;
10541 else
10542 abort ();
10543 insn |= rtra;
10544 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10545 /* Was PPC64_TLS which sits on insn boundary, now
10546 PPC64_TPREL16_LO which is at low-order half-word. */
10547 rel->r_offset += d_offset;
10548 r_type = R_PPC64_TPREL16_LO;
10549 if (toc_symndx != 0)
10550 {
10551 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10552 rel->r_addend = toc_addend;
10553 /* We changed the symbol. Start over in order to
10554 get h, sym, sec etc. right. */
10555 rel--;
10556 continue;
10557 }
10558 else
10559 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10560 }
10561 break;
10562
10563 case R_PPC64_GOT_TLSGD16_HI:
10564 case R_PPC64_GOT_TLSGD16_HA:
10565 tls_gd = TLS_TPRELGD;
10566 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10567 goto tls_gdld_hi;
10568 break;
10569
10570 case R_PPC64_GOT_TLSLD16_HI:
10571 case R_PPC64_GOT_TLSLD16_HA:
10572 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10573 {
10574 tls_gdld_hi:
10575 if ((tls_mask & tls_gd) != 0)
10576 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10577 + R_PPC64_GOT_TPREL16_DS);
10578 else
10579 {
10580 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10581 rel->r_offset -= d_offset;
10582 r_type = R_PPC64_NONE;
10583 }
10584 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10585 }
10586 break;
10587
10588 case R_PPC64_GOT_TLSGD16:
10589 case R_PPC64_GOT_TLSGD16_LO:
10590 tls_gd = TLS_TPRELGD;
10591 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10592 goto tls_ldgd_opt;
10593 break;
10594
10595 case R_PPC64_GOT_TLSLD16:
10596 case R_PPC64_GOT_TLSLD16_LO:
10597 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10598 {
10599 unsigned int insn1, insn2, insn3;
10600 bfd_vma offset;
10601
10602 tls_ldgd_opt:
10603 offset = (bfd_vma) -1;
10604 /* If not using the newer R_PPC64_TLSGD/LD to mark
10605 __tls_get_addr calls, we must trust that the call
10606 stays with its arg setup insns, ie. that the next
10607 reloc is the __tls_get_addr call associated with
10608 the current reloc. Edit both insns. */
10609 if (input_section->has_tls_get_addr_call
10610 && rel + 1 < relend
10611 && branch_reloc_hash_match (input_bfd, rel + 1,
10612 htab->tls_get_addr,
10613 htab->tls_get_addr_fd))
10614 offset = rel[1].r_offset;
10615 if ((tls_mask & tls_gd) != 0)
10616 {
10617 /* IE */
10618 insn1 = bfd_get_32 (output_bfd,
10619 contents + rel->r_offset - d_offset);
10620 insn1 &= (1 << 26) - (1 << 2);
10621 insn1 |= 58 << 26; /* ld */
10622 insn2 = 0x7c636a14; /* add 3,3,13 */
10623 if (offset != (bfd_vma) -1)
10624 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10625 R_PPC64_NONE);
10626 if ((tls_mask & TLS_EXPLICIT) == 0)
10627 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10628 + R_PPC64_GOT_TPREL16_DS);
10629 else
10630 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10631 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10632 }
10633 else
10634 {
10635 /* LE */
10636 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10637 insn2 = 0x38630000; /* addi 3,3,0 */
10638 if (tls_gd == 0)
10639 {
10640 /* Was an LD reloc. */
10641 if (toc_symndx)
10642 sec = local_sections[toc_symndx];
10643 for (r_symndx = 0;
10644 r_symndx < symtab_hdr->sh_info;
10645 r_symndx++)
10646 if (local_sections[r_symndx] == sec)
10647 break;
10648 if (r_symndx >= symtab_hdr->sh_info)
10649 r_symndx = 0;
10650 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10651 if (r_symndx != 0)
10652 rel->r_addend -= (local_syms[r_symndx].st_value
10653 + sec->output_offset
10654 + sec->output_section->vma);
10655 }
10656 else if (toc_symndx != 0)
10657 {
10658 r_symndx = toc_symndx;
10659 rel->r_addend = toc_addend;
10660 }
10661 r_type = R_PPC64_TPREL16_HA;
10662 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10663 if (offset != (bfd_vma) -1)
10664 {
10665 rel[1].r_info = ELF64_R_INFO (r_symndx,
10666 R_PPC64_TPREL16_LO);
10667 rel[1].r_offset = offset + d_offset;
10668 rel[1].r_addend = rel->r_addend;
10669 }
10670 }
10671 bfd_put_32 (output_bfd, insn1,
10672 contents + rel->r_offset - d_offset);
10673 if (offset != (bfd_vma) -1)
10674 {
10675 insn3 = bfd_get_32 (output_bfd,
10676 contents + offset + 4);
10677 if (insn3 == NOP
10678 || insn3 == CROR_151515 || insn3 == CROR_313131)
10679 {
10680 rel[1].r_offset += 4;
10681 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
10682 insn2 = NOP;
10683 }
10684 bfd_put_32 (output_bfd, insn2, contents + offset);
10685 }
10686 if ((tls_mask & tls_gd) == 0
10687 && (tls_gd == 0 || toc_symndx != 0))
10688 {
10689 /* We changed the symbol. Start over in order
10690 to get h, sym, sec etc. right. */
10691 rel--;
10692 continue;
10693 }
10694 }
10695 break;
10696
10697 case R_PPC64_TLSGD:
10698 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10699 {
10700 unsigned int insn2, insn3;
10701 bfd_vma offset = rel->r_offset;
10702
10703 if ((tls_mask & TLS_TPRELGD) != 0)
10704 {
10705 /* IE */
10706 r_type = R_PPC64_NONE;
10707 insn2 = 0x7c636a14; /* add 3,3,13 */
10708 }
10709 else
10710 {
10711 /* LE */
10712 if (toc_symndx != 0)
10713 {
10714 r_symndx = toc_symndx;
10715 rel->r_addend = toc_addend;
10716 }
10717 r_type = R_PPC64_TPREL16_LO;
10718 rel->r_offset = offset + d_offset;
10719 insn2 = 0x38630000; /* addi 3,3,0 */
10720 }
10721 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10722 /* Zap the reloc on the _tls_get_addr call too. */
10723 BFD_ASSERT (offset == rel[1].r_offset);
10724 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10725 R_PPC64_NONE);
10726 insn3 = bfd_get_32 (output_bfd,
10727 contents + offset + 4);
10728 if (insn3 == NOP
10729 || insn3 == CROR_151515 || insn3 == CROR_313131)
10730 {
10731 rel->r_offset += 4;
10732 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
10733 insn2 = NOP;
10734 }
10735 bfd_put_32 (output_bfd, insn2, contents + offset);
10736 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
10737 {
10738 rel--;
10739 continue;
10740 }
10741 }
10742 break;
10743
10744 case R_PPC64_TLSLD:
10745 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10746 {
10747 unsigned int insn2, insn3;
10748 bfd_vma offset = rel->r_offset;
10749
10750 if (toc_symndx)
10751 sec = local_sections[toc_symndx];
10752 for (r_symndx = 0;
10753 r_symndx < symtab_hdr->sh_info;
10754 r_symndx++)
10755 if (local_sections[r_symndx] == sec)
10756 break;
10757 if (r_symndx >= symtab_hdr->sh_info)
10758 r_symndx = 0;
10759 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10760 if (r_symndx != 0)
10761 rel->r_addend -= (local_syms[r_symndx].st_value
10762 + sec->output_offset
10763 + sec->output_section->vma);
10764
10765 r_type = R_PPC64_TPREL16_LO;
10766 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10767 rel->r_offset = offset + d_offset;
10768 /* Zap the reloc on the _tls_get_addr call too. */
10769 BFD_ASSERT (offset == rel[1].r_offset);
10770 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10771 R_PPC64_NONE);
10772 insn2 = 0x38630000; /* addi 3,3,0 */
10773 insn3 = bfd_get_32 (output_bfd,
10774 contents + offset + 4);
10775 if (insn3 == NOP
10776 || insn3 == CROR_151515 || insn3 == CROR_313131)
10777 {
10778 rel->r_offset += 4;
10779 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
10780 insn2 = NOP;
10781 }
10782 bfd_put_32 (output_bfd, insn2, contents + offset);
10783 rel--;
10784 continue;
10785 }
10786 break;
10787
10788 case R_PPC64_DTPMOD64:
10789 if (rel + 1 < relend
10790 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10791 && rel[1].r_offset == rel->r_offset + 8)
10792 {
10793 if ((tls_mask & TLS_GD) == 0)
10794 {
10795 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10796 if ((tls_mask & TLS_TPRELGD) != 0)
10797 r_type = R_PPC64_TPREL64;
10798 else
10799 {
10800 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10801 r_type = R_PPC64_NONE;
10802 }
10803 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10804 }
10805 }
10806 else
10807 {
10808 if ((tls_mask & TLS_LD) == 0)
10809 {
10810 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10811 r_type = R_PPC64_NONE;
10812 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10813 }
10814 }
10815 break;
10816
10817 case R_PPC64_TPREL64:
10818 if ((tls_mask & TLS_TPREL) == 0)
10819 {
10820 r_type = R_PPC64_NONE;
10821 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10822 }
10823 break;
10824 }
10825
10826 /* Handle other relocations that tweak non-addend part of insn. */
10827 insn = 0;
10828 max_br_offset = 1 << 25;
10829 addend = rel->r_addend;
10830 switch (r_type)
10831 {
10832 default:
10833 break;
10834
10835 /* Branch taken prediction relocations. */
10836 case R_PPC64_ADDR14_BRTAKEN:
10837 case R_PPC64_REL14_BRTAKEN:
10838 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10839 /* Fall thru. */
10840
10841 /* Branch not taken prediction relocations. */
10842 case R_PPC64_ADDR14_BRNTAKEN:
10843 case R_PPC64_REL14_BRNTAKEN:
10844 insn |= bfd_get_32 (output_bfd,
10845 contents + rel->r_offset) & ~(0x01 << 21);
10846 /* Fall thru. */
10847
10848 case R_PPC64_REL14:
10849 max_br_offset = 1 << 15;
10850 /* Fall thru. */
10851
10852 case R_PPC64_REL24:
10853 /* Calls to functions with a different TOC, such as calls to
10854 shared objects, need to alter the TOC pointer. This is
10855 done using a linkage stub. A REL24 branching to these
10856 linkage stubs needs to be followed by a nop, as the nop
10857 will be replaced with an instruction to restore the TOC
10858 base pointer. */
10859 stub_entry = NULL;
10860 fdh = h;
10861 if (((h != NULL
10862 && (((fdh = h->oh) != NULL
10863 && fdh->elf.plt.plist != NULL)
10864 || (fdh = h)->elf.plt.plist != NULL))
10865 || (sec != NULL
10866 && sec->output_section != NULL
10867 && sec->id <= htab->top_id
10868 && (htab->stub_group[sec->id].toc_off
10869 != htab->stub_group[input_section->id].toc_off)))
10870 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10871 rel, htab)) != NULL
10872 && (stub_entry->stub_type == ppc_stub_plt_call
10873 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10874 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10875 {
10876 bfd_boolean can_plt_call = FALSE;
10877
10878 if (rel->r_offset + 8 <= input_section->size)
10879 {
10880 unsigned long nop;
10881 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10882 if (nop == NOP
10883 || nop == CROR_151515 || nop == CROR_313131)
10884 {
10885 bfd_put_32 (input_bfd, LD_R2_40R1,
10886 contents + rel->r_offset + 4);
10887 can_plt_call = TRUE;
10888 }
10889 }
10890
10891 if (!can_plt_call)
10892 {
10893 if (stub_entry->stub_type == ppc_stub_plt_call)
10894 {
10895 /* If this is a plain branch rather than a branch
10896 and link, don't require a nop. However, don't
10897 allow tail calls in a shared library as they
10898 will result in r2 being corrupted. */
10899 unsigned long br;
10900 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10901 if (info->executable && (br & 1) == 0)
10902 can_plt_call = TRUE;
10903 else
10904 stub_entry = NULL;
10905 }
10906 else if (h != NULL
10907 && strcmp (h->elf.root.root.string,
10908 ".__libc_start_main") == 0)
10909 {
10910 /* Allow crt1 branch to go via a toc adjusting stub. */
10911 can_plt_call = TRUE;
10912 }
10913 else
10914 {
10915 if (strcmp (input_section->output_section->name,
10916 ".init") == 0
10917 || strcmp (input_section->output_section->name,
10918 ".fini") == 0)
10919 (*_bfd_error_handler)
10920 (_("%B(%A+0x%lx): automatic multiple TOCs "
10921 "not supported using your crt files; "
10922 "recompile with -mminimal-toc or upgrade gcc"),
10923 input_bfd,
10924 input_section,
10925 (long) rel->r_offset);
10926 else
10927 (*_bfd_error_handler)
10928 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10929 "does not allow automatic multiple TOCs; "
10930 "recompile with -mminimal-toc or "
10931 "-fno-optimize-sibling-calls, "
10932 "or make `%s' extern"),
10933 input_bfd,
10934 input_section,
10935 (long) rel->r_offset,
10936 sym_name,
10937 sym_name);
10938 bfd_set_error (bfd_error_bad_value);
10939 ret = FALSE;
10940 }
10941 }
10942
10943 if (can_plt_call
10944 && stub_entry->stub_type == ppc_stub_plt_call)
10945 unresolved_reloc = FALSE;
10946 }
10947
10948 if (stub_entry == NULL
10949 && get_opd_info (sec) != NULL)
10950 {
10951 /* The branch destination is the value of the opd entry. */
10952 bfd_vma off = (relocation + addend
10953 - sec->output_section->vma
10954 - sec->output_offset);
10955 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10956 if (dest != (bfd_vma) -1)
10957 {
10958 relocation = dest;
10959 addend = 0;
10960 }
10961 }
10962
10963 /* If the branch is out of reach we ought to have a long
10964 branch stub. */
10965 from = (rel->r_offset
10966 + input_section->output_offset
10967 + input_section->output_section->vma);
10968
10969 if (stub_entry == NULL
10970 && (relocation + addend - from + max_br_offset
10971 >= 2 * max_br_offset)
10972 && r_type != R_PPC64_ADDR14_BRTAKEN
10973 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10974 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10975 htab);
10976
10977 if (stub_entry != NULL)
10978 {
10979 /* Munge up the value and addend so that we call the stub
10980 rather than the procedure directly. */
10981 relocation = (stub_entry->stub_offset
10982 + stub_entry->stub_sec->output_offset
10983 + stub_entry->stub_sec->output_section->vma);
10984 addend = 0;
10985 }
10986
10987 if (insn != 0)
10988 {
10989 if (is_power4)
10990 {
10991 /* Set 'a' bit. This is 0b00010 in BO field for branch
10992 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10993 for branch on CTR insns (BO == 1a00t or 1a01t). */
10994 if ((insn & (0x14 << 21)) == (0x04 << 21))
10995 insn |= 0x02 << 21;
10996 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10997 insn |= 0x08 << 21;
10998 else
10999 break;
11000 }
11001 else
11002 {
11003 /* Invert 'y' bit if not the default. */
11004 if ((bfd_signed_vma) (relocation + addend - from) < 0)
11005 insn ^= 0x01 << 21;
11006 }
11007
11008 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11009 }
11010
11011 /* NOP out calls to undefined weak functions.
11012 We can thus call a weak function without first
11013 checking whether the function is defined. */
11014 else if (h != NULL
11015 && h->elf.root.type == bfd_link_hash_undefweak
11016 && r_type == R_PPC64_REL24
11017 && relocation == 0
11018 && addend == 0)
11019 {
11020 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11021 continue;
11022 }
11023 break;
11024 }
11025
11026 /* Set `addend'. */
11027 tls_type = 0;
11028 switch (r_type)
11029 {
11030 default:
11031 (*_bfd_error_handler)
11032 (_("%B: unknown relocation type %d for symbol %s"),
11033 input_bfd, (int) r_type, sym_name);
11034
11035 bfd_set_error (bfd_error_bad_value);
11036 ret = FALSE;
11037 continue;
11038
11039 case R_PPC64_NONE:
11040 case R_PPC64_TLS:
11041 case R_PPC64_TLSGD:
11042 case R_PPC64_TLSLD:
11043 case R_PPC64_GNU_VTINHERIT:
11044 case R_PPC64_GNU_VTENTRY:
11045 continue;
11046
11047 /* GOT16 relocations. Like an ADDR16 using the symbol's
11048 address in the GOT as relocation value instead of the
11049 symbol's value itself. Also, create a GOT entry for the
11050 symbol and put the symbol value there. */
11051 case R_PPC64_GOT_TLSGD16:
11052 case R_PPC64_GOT_TLSGD16_LO:
11053 case R_PPC64_GOT_TLSGD16_HI:
11054 case R_PPC64_GOT_TLSGD16_HA:
11055 tls_type = TLS_TLS | TLS_GD;
11056 goto dogot;
11057
11058 case R_PPC64_GOT_TLSLD16:
11059 case R_PPC64_GOT_TLSLD16_LO:
11060 case R_PPC64_GOT_TLSLD16_HI:
11061 case R_PPC64_GOT_TLSLD16_HA:
11062 tls_type = TLS_TLS | TLS_LD;
11063 goto dogot;
11064
11065 case R_PPC64_GOT_TPREL16_DS:
11066 case R_PPC64_GOT_TPREL16_LO_DS:
11067 case R_PPC64_GOT_TPREL16_HI:
11068 case R_PPC64_GOT_TPREL16_HA:
11069 tls_type = TLS_TLS | TLS_TPREL;
11070 goto dogot;
11071
11072 case R_PPC64_GOT_DTPREL16_DS:
11073 case R_PPC64_GOT_DTPREL16_LO_DS:
11074 case R_PPC64_GOT_DTPREL16_HI:
11075 case R_PPC64_GOT_DTPREL16_HA:
11076 tls_type = TLS_TLS | TLS_DTPREL;
11077 goto dogot;
11078
11079 case R_PPC64_GOT16:
11080 case R_PPC64_GOT16_LO:
11081 case R_PPC64_GOT16_HI:
11082 case R_PPC64_GOT16_HA:
11083 case R_PPC64_GOT16_DS:
11084 case R_PPC64_GOT16_LO_DS:
11085 dogot:
11086 {
11087 /* Relocation is to the entry for this symbol in the global
11088 offset table. */
11089 asection *got;
11090 bfd_vma *offp;
11091 bfd_vma off;
11092 unsigned long indx = 0;
11093
11094 if (tls_type == (TLS_TLS | TLS_LD)
11095 && (h == NULL
11096 || !h->elf.def_dynamic))
11097 offp = &ppc64_tlsld_got (input_bfd)->offset;
11098 else
11099 {
11100 struct got_entry *ent;
11101
11102 if (h != NULL)
11103 {
11104 bfd_boolean dyn = htab->elf.dynamic_sections_created;
11105 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
11106 &h->elf)
11107 || (info->shared
11108 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
11109 /* This is actually a static link, or it is a
11110 -Bsymbolic link and the symbol is defined
11111 locally, or the symbol was forced to be local
11112 because of a version file. */
11113 ;
11114 else
11115 {
11116 indx = h->elf.dynindx;
11117 unresolved_reloc = FALSE;
11118 }
11119 ent = h->elf.got.glist;
11120 }
11121 else
11122 {
11123 if (local_got_ents == NULL)
11124 abort ();
11125 ent = local_got_ents[r_symndx];
11126 }
11127
11128 for (; ent != NULL; ent = ent->next)
11129 if (ent->addend == orig_addend
11130 && ent->owner == input_bfd
11131 && ent->tls_type == tls_type)
11132 break;
11133 if (ent == NULL)
11134 abort ();
11135 offp = &ent->got.offset;
11136 }
11137
11138 got = ppc64_elf_tdata (input_bfd)->got;
11139 if (got == NULL)
11140 abort ();
11141
11142 /* The offset must always be a multiple of 8. We use the
11143 least significant bit to record whether we have already
11144 processed this entry. */
11145 off = *offp;
11146 if ((off & 1) != 0)
11147 off &= ~1;
11148 else
11149 {
11150 /* Generate relocs for the dynamic linker, except in
11151 the case of TLSLD where we'll use one entry per
11152 module. */
11153 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
11154
11155 *offp = off | 1;
11156 if ((info->shared || indx != 0)
11157 && (offp == &ppc64_tlsld_got (input_bfd)->offset
11158 || h == NULL
11159 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11160 || h->elf.root.type != bfd_link_hash_undefweak))
11161 {
11162 outrel.r_offset = (got->output_section->vma
11163 + got->output_offset
11164 + off);
11165 outrel.r_addend = addend;
11166 if (tls_type & (TLS_LD | TLS_GD))
11167 {
11168 outrel.r_addend = 0;
11169 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11170 if (tls_type == (TLS_TLS | TLS_GD))
11171 {
11172 loc = relgot->contents;
11173 loc += (relgot->reloc_count++
11174 * sizeof (Elf64_External_Rela));
11175 bfd_elf64_swap_reloca_out (output_bfd,
11176 &outrel, loc);
11177 outrel.r_offset += 8;
11178 outrel.r_addend = addend;
11179 outrel.r_info
11180 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11181 }
11182 }
11183 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11184 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11185 else if (tls_type == (TLS_TLS | TLS_TPREL))
11186 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11187 else if (indx == 0)
11188 {
11189 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
11190
11191 /* Write the .got section contents for the sake
11192 of prelink. */
11193 loc = got->contents + off;
11194 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11195 loc);
11196 }
11197 else
11198 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11199
11200 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11201 {
11202 outrel.r_addend += relocation;
11203 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11204 outrel.r_addend -= htab->elf.tls_sec->vma;
11205 }
11206 loc = relgot->contents;
11207 loc += (relgot->reloc_count++
11208 * sizeof (Elf64_External_Rela));
11209 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11210 }
11211
11212 /* Init the .got section contents here if we're not
11213 emitting a reloc. */
11214 else
11215 {
11216 relocation += addend;
11217 if (tls_type == (TLS_TLS | TLS_LD))
11218 relocation = 1;
11219 else if (tls_type != 0)
11220 {
11221 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11222 if (tls_type == (TLS_TLS | TLS_TPREL))
11223 relocation += DTP_OFFSET - TP_OFFSET;
11224
11225 if (tls_type == (TLS_TLS | TLS_GD))
11226 {
11227 bfd_put_64 (output_bfd, relocation,
11228 got->contents + off + 8);
11229 relocation = 1;
11230 }
11231 }
11232
11233 bfd_put_64 (output_bfd, relocation,
11234 got->contents + off);
11235 }
11236 }
11237
11238 if (off >= (bfd_vma) -2)
11239 abort ();
11240
11241 relocation = got->output_offset + off;
11242
11243 /* TOC base (r2) is TOC start plus 0x8000. */
11244 addend = -TOC_BASE_OFF;
11245 }
11246 break;
11247
11248 case R_PPC64_PLT16_HA:
11249 case R_PPC64_PLT16_HI:
11250 case R_PPC64_PLT16_LO:
11251 case R_PPC64_PLT32:
11252 case R_PPC64_PLT64:
11253 /* Relocation is to the entry for this symbol in the
11254 procedure linkage table. */
11255
11256 /* Resolve a PLT reloc against a local symbol directly,
11257 without using the procedure linkage table. */
11258 if (h == NULL)
11259 break;
11260
11261 /* It's possible that we didn't make a PLT entry for this
11262 symbol. This happens when statically linking PIC code,
11263 or when using -Bsymbolic. Go find a match if there is a
11264 PLT entry. */
11265 if (htab->plt != NULL)
11266 {
11267 struct plt_entry *ent;
11268 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11269 if (ent->addend == orig_addend
11270 && ent->plt.offset != (bfd_vma) -1)
11271 {
11272 relocation = (htab->plt->output_section->vma
11273 + htab->plt->output_offset
11274 + ent->plt.offset);
11275 unresolved_reloc = FALSE;
11276 }
11277 }
11278 break;
11279
11280 case R_PPC64_TOC:
11281 /* Relocation value is TOC base. */
11282 relocation = TOCstart;
11283 if (r_symndx == 0)
11284 relocation += htab->stub_group[input_section->id].toc_off;
11285 else if (unresolved_reloc)
11286 ;
11287 else if (sec != NULL && sec->id <= htab->top_id)
11288 relocation += htab->stub_group[sec->id].toc_off;
11289 else
11290 unresolved_reloc = TRUE;
11291 goto dodyn;
11292
11293 /* TOC16 relocs. We want the offset relative to the TOC base,
11294 which is the address of the start of the TOC plus 0x8000.
11295 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11296 in this order. */
11297 case R_PPC64_TOC16:
11298 case R_PPC64_TOC16_LO:
11299 case R_PPC64_TOC16_HI:
11300 case R_PPC64_TOC16_DS:
11301 case R_PPC64_TOC16_LO_DS:
11302 case R_PPC64_TOC16_HA:
11303 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11304 break;
11305
11306 /* Relocate against the beginning of the section. */
11307 case R_PPC64_SECTOFF:
11308 case R_PPC64_SECTOFF_LO:
11309 case R_PPC64_SECTOFF_HI:
11310 case R_PPC64_SECTOFF_DS:
11311 case R_PPC64_SECTOFF_LO_DS:
11312 case R_PPC64_SECTOFF_HA:
11313 if (sec != NULL)
11314 addend -= sec->output_section->vma;
11315 break;
11316
11317 case R_PPC64_REL14:
11318 case R_PPC64_REL14_BRNTAKEN:
11319 case R_PPC64_REL14_BRTAKEN:
11320 case R_PPC64_REL24:
11321 break;
11322
11323 case R_PPC64_TPREL16:
11324 case R_PPC64_TPREL16_LO:
11325 case R_PPC64_TPREL16_HI:
11326 case R_PPC64_TPREL16_HA:
11327 case R_PPC64_TPREL16_DS:
11328 case R_PPC64_TPREL16_LO_DS:
11329 case R_PPC64_TPREL16_HIGHER:
11330 case R_PPC64_TPREL16_HIGHERA:
11331 case R_PPC64_TPREL16_HIGHEST:
11332 case R_PPC64_TPREL16_HIGHESTA:
11333 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11334 if (info->shared)
11335 /* The TPREL16 relocs shouldn't really be used in shared
11336 libs as they will result in DT_TEXTREL being set, but
11337 support them anyway. */
11338 goto dodyn;
11339 break;
11340
11341 case R_PPC64_DTPREL16:
11342 case R_PPC64_DTPREL16_LO:
11343 case R_PPC64_DTPREL16_HI:
11344 case R_PPC64_DTPREL16_HA:
11345 case R_PPC64_DTPREL16_DS:
11346 case R_PPC64_DTPREL16_LO_DS:
11347 case R_PPC64_DTPREL16_HIGHER:
11348 case R_PPC64_DTPREL16_HIGHERA:
11349 case R_PPC64_DTPREL16_HIGHEST:
11350 case R_PPC64_DTPREL16_HIGHESTA:
11351 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11352 break;
11353
11354 case R_PPC64_DTPMOD64:
11355 relocation = 1;
11356 addend = 0;
11357 goto dodyn;
11358
11359 case R_PPC64_TPREL64:
11360 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11361 goto dodyn;
11362
11363 case R_PPC64_DTPREL64:
11364 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11365 /* Fall thru */
11366
11367 /* Relocations that may need to be propagated if this is a
11368 dynamic object. */
11369 case R_PPC64_REL30:
11370 case R_PPC64_REL32:
11371 case R_PPC64_REL64:
11372 case R_PPC64_ADDR14:
11373 case R_PPC64_ADDR14_BRNTAKEN:
11374 case R_PPC64_ADDR14_BRTAKEN:
11375 case R_PPC64_ADDR16:
11376 case R_PPC64_ADDR16_DS:
11377 case R_PPC64_ADDR16_HA:
11378 case R_PPC64_ADDR16_HI:
11379 case R_PPC64_ADDR16_HIGHER:
11380 case R_PPC64_ADDR16_HIGHERA:
11381 case R_PPC64_ADDR16_HIGHEST:
11382 case R_PPC64_ADDR16_HIGHESTA:
11383 case R_PPC64_ADDR16_LO:
11384 case R_PPC64_ADDR16_LO_DS:
11385 case R_PPC64_ADDR24:
11386 case R_PPC64_ADDR32:
11387 case R_PPC64_ADDR64:
11388 case R_PPC64_UADDR16:
11389 case R_PPC64_UADDR32:
11390 case R_PPC64_UADDR64:
11391 dodyn:
11392 if ((input_section->flags & SEC_ALLOC) == 0)
11393 break;
11394
11395 if (NO_OPD_RELOCS && is_opd)
11396 break;
11397
11398 if ((info->shared
11399 && (h == NULL
11400 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11401 || h->elf.root.type != bfd_link_hash_undefweak)
11402 && (must_be_dyn_reloc (info, r_type)
11403 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11404 || (ELIMINATE_COPY_RELOCS
11405 && !info->shared
11406 && h != NULL
11407 && h->elf.dynindx != -1
11408 && !h->elf.non_got_ref
11409 && !h->elf.def_regular))
11410 {
11411 Elf_Internal_Rela outrel;
11412 bfd_boolean skip, relocate;
11413 asection *sreloc;
11414 bfd_byte *loc;
11415 bfd_vma out_off;
11416
11417 /* When generating a dynamic object, these relocations
11418 are copied into the output file to be resolved at run
11419 time. */
11420
11421 skip = FALSE;
11422 relocate = FALSE;
11423
11424 out_off = _bfd_elf_section_offset (output_bfd, info,
11425 input_section, rel->r_offset);
11426 if (out_off == (bfd_vma) -1)
11427 skip = TRUE;
11428 else if (out_off == (bfd_vma) -2)
11429 skip = TRUE, relocate = TRUE;
11430 out_off += (input_section->output_section->vma
11431 + input_section->output_offset);
11432 outrel.r_offset = out_off;
11433 outrel.r_addend = rel->r_addend;
11434
11435 /* Optimize unaligned reloc use. */
11436 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11437 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11438 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11439 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11440 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11441 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11442 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11443 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11444 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11445
11446 if (skip)
11447 memset (&outrel, 0, sizeof outrel);
11448 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11449 && !is_opd
11450 && r_type != R_PPC64_TOC)
11451 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11452 else
11453 {
11454 /* This symbol is local, or marked to become local,
11455 or this is an opd section reloc which must point
11456 at a local function. */
11457 outrel.r_addend += relocation;
11458 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11459 {
11460 if (is_opd && h != NULL)
11461 {
11462 /* Lie about opd entries. This case occurs
11463 when building shared libraries and we
11464 reference a function in another shared
11465 lib. The same thing happens for a weak
11466 definition in an application that's
11467 overridden by a strong definition in a
11468 shared lib. (I believe this is a generic
11469 bug in binutils handling of weak syms.)
11470 In these cases we won't use the opd
11471 entry in this lib. */
11472 unresolved_reloc = FALSE;
11473 }
11474 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11475
11476 /* We need to relocate .opd contents for ld.so.
11477 Prelink also wants simple and consistent rules
11478 for relocs. This make all RELATIVE relocs have
11479 *r_offset equal to r_addend. */
11480 relocate = TRUE;
11481 }
11482 else
11483 {
11484 long indx = 0;
11485
11486 if (r_symndx == 0 || bfd_is_abs_section (sec))
11487 ;
11488 else if (sec == NULL || sec->owner == NULL)
11489 {
11490 bfd_set_error (bfd_error_bad_value);
11491 return FALSE;
11492 }
11493 else
11494 {
11495 asection *osec;
11496
11497 osec = sec->output_section;
11498 indx = elf_section_data (osec)->dynindx;
11499
11500 if (indx == 0)
11501 {
11502 if ((osec->flags & SEC_READONLY) == 0
11503 && htab->elf.data_index_section != NULL)
11504 osec = htab->elf.data_index_section;
11505 else
11506 osec = htab->elf.text_index_section;
11507 indx = elf_section_data (osec)->dynindx;
11508 }
11509 BFD_ASSERT (indx != 0);
11510
11511 /* We are turning this relocation into one
11512 against a section symbol, so subtract out
11513 the output section's address but not the
11514 offset of the input section in the output
11515 section. */
11516 outrel.r_addend -= osec->vma;
11517 }
11518
11519 outrel.r_info = ELF64_R_INFO (indx, r_type);
11520 }
11521 }
11522
11523 sreloc = elf_section_data (input_section)->sreloc;
11524 if (sreloc == NULL)
11525 abort ();
11526
11527 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11528 >= sreloc->size)
11529 abort ();
11530 loc = sreloc->contents;
11531 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11532 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11533
11534 /* If this reloc is against an external symbol, it will
11535 be computed at runtime, so there's no need to do
11536 anything now. However, for the sake of prelink ensure
11537 that the section contents are a known value. */
11538 if (! relocate)
11539 {
11540 unresolved_reloc = FALSE;
11541 /* The value chosen here is quite arbitrary as ld.so
11542 ignores section contents except for the special
11543 case of .opd where the contents might be accessed
11544 before relocation. Choose zero, as that won't
11545 cause reloc overflow. */
11546 relocation = 0;
11547 addend = 0;
11548 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11549 to improve backward compatibility with older
11550 versions of ld. */
11551 if (r_type == R_PPC64_ADDR64)
11552 addend = outrel.r_addend;
11553 /* Adjust pc_relative relocs to have zero in *r_offset. */
11554 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11555 addend = (input_section->output_section->vma
11556 + input_section->output_offset
11557 + rel->r_offset);
11558 }
11559 }
11560 break;
11561
11562 case R_PPC64_COPY:
11563 case R_PPC64_GLOB_DAT:
11564 case R_PPC64_JMP_SLOT:
11565 case R_PPC64_RELATIVE:
11566 /* We shouldn't ever see these dynamic relocs in relocatable
11567 files. */
11568 /* Fall through. */
11569
11570 case R_PPC64_PLTGOT16:
11571 case R_PPC64_PLTGOT16_DS:
11572 case R_PPC64_PLTGOT16_HA:
11573 case R_PPC64_PLTGOT16_HI:
11574 case R_PPC64_PLTGOT16_LO:
11575 case R_PPC64_PLTGOT16_LO_DS:
11576 case R_PPC64_PLTREL32:
11577 case R_PPC64_PLTREL64:
11578 /* These ones haven't been implemented yet. */
11579
11580 (*_bfd_error_handler)
11581 (_("%B: relocation %s is not supported for symbol %s."),
11582 input_bfd,
11583 ppc64_elf_howto_table[r_type]->name, sym_name);
11584
11585 bfd_set_error (bfd_error_invalid_operation);
11586 ret = FALSE;
11587 continue;
11588 }
11589
11590 /* Do any further special processing. */
11591 switch (r_type)
11592 {
11593 default:
11594 break;
11595
11596 case R_PPC64_ADDR16_HA:
11597 case R_PPC64_ADDR16_HIGHERA:
11598 case R_PPC64_ADDR16_HIGHESTA:
11599 case R_PPC64_TOC16_HA:
11600 case R_PPC64_SECTOFF_HA:
11601 case R_PPC64_TPREL16_HA:
11602 case R_PPC64_DTPREL16_HA:
11603 case R_PPC64_TPREL16_HIGHER:
11604 case R_PPC64_TPREL16_HIGHERA:
11605 case R_PPC64_TPREL16_HIGHEST:
11606 case R_PPC64_TPREL16_HIGHESTA:
11607 case R_PPC64_DTPREL16_HIGHER:
11608 case R_PPC64_DTPREL16_HIGHERA:
11609 case R_PPC64_DTPREL16_HIGHEST:
11610 case R_PPC64_DTPREL16_HIGHESTA:
11611 /* It's just possible that this symbol is a weak symbol
11612 that's not actually defined anywhere. In that case,
11613 'sec' would be NULL, and we should leave the symbol
11614 alone (it will be set to zero elsewhere in the link). */
11615 if (sec == NULL)
11616 break;
11617 /* Fall thru */
11618
11619 case R_PPC64_GOT16_HA:
11620 case R_PPC64_PLTGOT16_HA:
11621 case R_PPC64_PLT16_HA:
11622 case R_PPC64_GOT_TLSGD16_HA:
11623 case R_PPC64_GOT_TLSLD16_HA:
11624 case R_PPC64_GOT_TPREL16_HA:
11625 case R_PPC64_GOT_DTPREL16_HA:
11626 /* Add 0x10000 if sign bit in 0:15 is set.
11627 Bits 0:15 are not used. */
11628 addend += 0x8000;
11629 break;
11630
11631 case R_PPC64_ADDR16_DS:
11632 case R_PPC64_ADDR16_LO_DS:
11633 case R_PPC64_GOT16_DS:
11634 case R_PPC64_GOT16_LO_DS:
11635 case R_PPC64_PLT16_LO_DS:
11636 case R_PPC64_SECTOFF_DS:
11637 case R_PPC64_SECTOFF_LO_DS:
11638 case R_PPC64_TOC16_DS:
11639 case R_PPC64_TOC16_LO_DS:
11640 case R_PPC64_PLTGOT16_DS:
11641 case R_PPC64_PLTGOT16_LO_DS:
11642 case R_PPC64_GOT_TPREL16_DS:
11643 case R_PPC64_GOT_TPREL16_LO_DS:
11644 case R_PPC64_GOT_DTPREL16_DS:
11645 case R_PPC64_GOT_DTPREL16_LO_DS:
11646 case R_PPC64_TPREL16_DS:
11647 case R_PPC64_TPREL16_LO_DS:
11648 case R_PPC64_DTPREL16_DS:
11649 case R_PPC64_DTPREL16_LO_DS:
11650 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11651 mask = 3;
11652 /* If this reloc is against an lq insn, then the value must be
11653 a multiple of 16. This is somewhat of a hack, but the
11654 "correct" way to do this by defining _DQ forms of all the
11655 _DS relocs bloats all reloc switches in this file. It
11656 doesn't seem to make much sense to use any of these relocs
11657 in data, so testing the insn should be safe. */
11658 if ((insn & (0x3f << 26)) == (56u << 26))
11659 mask = 15;
11660 if (((relocation + addend) & mask) != 0)
11661 {
11662 (*_bfd_error_handler)
11663 (_("%B: error: relocation %s not a multiple of %d"),
11664 input_bfd,
11665 ppc64_elf_howto_table[r_type]->name,
11666 mask + 1);
11667 bfd_set_error (bfd_error_bad_value);
11668 ret = FALSE;
11669 continue;
11670 }
11671 break;
11672 }
11673
11674 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11675 because such sections are not SEC_ALLOC and thus ld.so will
11676 not process them. */
11677 if (unresolved_reloc
11678 && !((input_section->flags & SEC_DEBUGGING) != 0
11679 && h->elf.def_dynamic))
11680 {
11681 (*_bfd_error_handler)
11682 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11683 input_bfd,
11684 input_section,
11685 (long) rel->r_offset,
11686 ppc64_elf_howto_table[(int) r_type]->name,
11687 h->elf.root.root.string);
11688 ret = FALSE;
11689 }
11690
11691 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11692 input_bfd,
11693 input_section,
11694 contents,
11695 rel->r_offset,
11696 relocation,
11697 addend);
11698
11699 if (r != bfd_reloc_ok)
11700 {
11701 if (sym_name == NULL)
11702 sym_name = "(null)";
11703 if (r == bfd_reloc_overflow)
11704 {
11705 if (warned)
11706 continue;
11707 if (h != NULL
11708 && h->elf.root.type == bfd_link_hash_undefweak
11709 && ppc64_elf_howto_table[r_type]->pc_relative)
11710 {
11711 /* Assume this is a call protected by other code that
11712 detects the symbol is undefined. If this is the case,
11713 we can safely ignore the overflow. If not, the
11714 program is hosed anyway, and a little warning isn't
11715 going to help. */
11716
11717 continue;
11718 }
11719
11720 if (!((*info->callbacks->reloc_overflow)
11721 (info, (h ? &h->elf.root : NULL), sym_name,
11722 ppc64_elf_howto_table[r_type]->name,
11723 orig_addend, input_bfd, input_section, rel->r_offset)))
11724 return FALSE;
11725 }
11726 else
11727 {
11728 (*_bfd_error_handler)
11729 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11730 input_bfd,
11731 input_section,
11732 (long) rel->r_offset,
11733 ppc64_elf_howto_table[r_type]->name,
11734 sym_name,
11735 (int) r);
11736 ret = FALSE;
11737 }
11738 }
11739 }
11740
11741 /* If we're emitting relocations, then shortly after this function
11742 returns, reloc offsets and addends for this section will be
11743 adjusted. Worse, reloc symbol indices will be for the output
11744 file rather than the input. Save a copy of the relocs for
11745 opd_entry_value. */
11746 if (is_opd && (info->emitrelocations || info->relocatable))
11747 {
11748 bfd_size_type amt;
11749 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11750 rel = bfd_alloc (input_bfd, amt);
11751 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11752 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11753 if (rel == NULL)
11754 return FALSE;
11755 memcpy (rel, relocs, amt);
11756 }
11757 return ret;
11758 }
11759
11760 /* Adjust the value of any local symbols in opd sections. */
11761
11762 static int
11763 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11764 const char *name ATTRIBUTE_UNUSED,
11765 Elf_Internal_Sym *elfsym,
11766 asection *input_sec,
11767 struct elf_link_hash_entry *h)
11768 {
11769 struct _opd_sec_data *opd;
11770 long adjust;
11771 bfd_vma value;
11772
11773 if (h != NULL)
11774 return 1;
11775
11776 opd = get_opd_info (input_sec);
11777 if (opd == NULL || opd->adjust == NULL)
11778 return 1;
11779
11780 value = elfsym->st_value - input_sec->output_offset;
11781 if (!info->relocatable)
11782 value -= input_sec->output_section->vma;
11783
11784 adjust = opd->adjust[value / 8];
11785 if (adjust == -1)
11786 return 2;
11787
11788 elfsym->st_value += adjust;
11789 return 1;
11790 }
11791
11792 /* Finish up dynamic symbol handling. We set the contents of various
11793 dynamic sections here. */
11794
11795 static bfd_boolean
11796 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11797 struct bfd_link_info *info,
11798 struct elf_link_hash_entry *h,
11799 Elf_Internal_Sym *sym)
11800 {
11801 struct ppc_link_hash_table *htab;
11802 struct plt_entry *ent;
11803 Elf_Internal_Rela rela;
11804 bfd_byte *loc;
11805
11806 htab = ppc_hash_table (info);
11807
11808 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11809 if (ent->plt.offset != (bfd_vma) -1)
11810 {
11811 /* This symbol has an entry in the procedure linkage
11812 table. Set it up. */
11813
11814 if (htab->plt == NULL
11815 || htab->relplt == NULL
11816 || htab->glink == NULL)
11817 abort ();
11818
11819 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11820 fill in the PLT entry. */
11821 rela.r_offset = (htab->plt->output_section->vma
11822 + htab->plt->output_offset
11823 + ent->plt.offset);
11824 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11825 rela.r_addend = ent->addend;
11826
11827 loc = htab->relplt->contents;
11828 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11829 * sizeof (Elf64_External_Rela));
11830 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11831 }
11832
11833 if (h->needs_copy)
11834 {
11835 Elf_Internal_Rela rela;
11836 bfd_byte *loc;
11837
11838 /* This symbol needs a copy reloc. Set it up. */
11839
11840 if (h->dynindx == -1
11841 || (h->root.type != bfd_link_hash_defined
11842 && h->root.type != bfd_link_hash_defweak)
11843 || htab->relbss == NULL)
11844 abort ();
11845
11846 rela.r_offset = (h->root.u.def.value
11847 + h->root.u.def.section->output_section->vma
11848 + h->root.u.def.section->output_offset);
11849 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11850 rela.r_addend = 0;
11851 loc = htab->relbss->contents;
11852 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11853 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11854 }
11855
11856 /* Mark some specially defined symbols as absolute. */
11857 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11858 sym->st_shndx = SHN_ABS;
11859
11860 return TRUE;
11861 }
11862
11863 /* Used to decide how to sort relocs in an optimal manner for the
11864 dynamic linker, before writing them out. */
11865
11866 static enum elf_reloc_type_class
11867 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11868 {
11869 enum elf_ppc64_reloc_type r_type;
11870
11871 r_type = ELF64_R_TYPE (rela->r_info);
11872 switch (r_type)
11873 {
11874 case R_PPC64_RELATIVE:
11875 return reloc_class_relative;
11876 case R_PPC64_JMP_SLOT:
11877 return reloc_class_plt;
11878 case R_PPC64_COPY:
11879 return reloc_class_copy;
11880 default:
11881 return reloc_class_normal;
11882 }
11883 }
11884
11885 /* Finish up the dynamic sections. */
11886
11887 static bfd_boolean
11888 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11889 struct bfd_link_info *info)
11890 {
11891 struct ppc_link_hash_table *htab;
11892 bfd *dynobj;
11893 asection *sdyn;
11894
11895 htab = ppc_hash_table (info);
11896 dynobj = htab->elf.dynobj;
11897 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11898
11899 if (htab->elf.dynamic_sections_created)
11900 {
11901 Elf64_External_Dyn *dyncon, *dynconend;
11902
11903 if (sdyn == NULL || htab->got == NULL)
11904 abort ();
11905
11906 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11907 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11908 for (; dyncon < dynconend; dyncon++)
11909 {
11910 Elf_Internal_Dyn dyn;
11911 asection *s;
11912
11913 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11914
11915 switch (dyn.d_tag)
11916 {
11917 default:
11918 continue;
11919
11920 case DT_PPC64_GLINK:
11921 s = htab->glink;
11922 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11923 /* We stupidly defined DT_PPC64_GLINK to be the start
11924 of glink rather than the first entry point, which is
11925 what ld.so needs, and now have a bigger stub to
11926 support automatic multiple TOCs. */
11927 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11928 break;
11929
11930 case DT_PPC64_OPD:
11931 s = bfd_get_section_by_name (output_bfd, ".opd");
11932 if (s == NULL)
11933 continue;
11934 dyn.d_un.d_ptr = s->vma;
11935 break;
11936
11937 case DT_PPC64_OPDSZ:
11938 s = bfd_get_section_by_name (output_bfd, ".opd");
11939 if (s == NULL)
11940 continue;
11941 dyn.d_un.d_val = s->size;
11942 break;
11943
11944 case DT_PLTGOT:
11945 s = htab->plt;
11946 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11947 break;
11948
11949 case DT_JMPREL:
11950 s = htab->relplt;
11951 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11952 break;
11953
11954 case DT_PLTRELSZ:
11955 dyn.d_un.d_val = htab->relplt->size;
11956 break;
11957
11958 case DT_RELASZ:
11959 /* Don't count procedure linkage table relocs in the
11960 overall reloc count. */
11961 s = htab->relplt;
11962 if (s == NULL)
11963 continue;
11964 dyn.d_un.d_val -= s->size;
11965 break;
11966
11967 case DT_RELA:
11968 /* We may not be using the standard ELF linker script.
11969 If .rela.plt is the first .rela section, we adjust
11970 DT_RELA to not include it. */
11971 s = htab->relplt;
11972 if (s == NULL)
11973 continue;
11974 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11975 continue;
11976 dyn.d_un.d_ptr += s->size;
11977 break;
11978 }
11979
11980 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11981 }
11982 }
11983
11984 if (htab->got != NULL && htab->got->size != 0)
11985 {
11986 /* Fill in the first entry in the global offset table.
11987 We use it to hold the link-time TOCbase. */
11988 bfd_put_64 (output_bfd,
11989 elf_gp (output_bfd) + TOC_BASE_OFF,
11990 htab->got->contents);
11991
11992 /* Set .got entry size. */
11993 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11994 }
11995
11996 if (htab->plt != NULL && htab->plt->size != 0)
11997 {
11998 /* Set .plt entry size. */
11999 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
12000 = PLT_ENTRY_SIZE;
12001 }
12002
12003 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
12004 brlt ourselves if emitrelocations. */
12005 if (htab->brlt != NULL
12006 && htab->brlt->reloc_count != 0
12007 && !_bfd_elf_link_output_relocs (output_bfd,
12008 htab->brlt,
12009 &elf_section_data (htab->brlt)->rel_hdr,
12010 elf_section_data (htab->brlt)->relocs,
12011 NULL))
12012 return FALSE;
12013
12014 if (htab->glink != NULL
12015 && htab->glink->reloc_count != 0
12016 && !_bfd_elf_link_output_relocs (output_bfd,
12017 htab->glink,
12018 &elf_section_data (htab->glink)->rel_hdr,
12019 elf_section_data (htab->glink)->relocs,
12020 NULL))
12021 return FALSE;
12022
12023 /* We need to handle writing out multiple GOT sections ourselves,
12024 since we didn't add them to DYNOBJ. We know dynobj is the first
12025 bfd. */
12026 while ((dynobj = dynobj->link_next) != NULL)
12027 {
12028 asection *s;
12029
12030 if (!is_ppc64_elf (dynobj))
12031 continue;
12032
12033 s = ppc64_elf_tdata (dynobj)->got;
12034 if (s != NULL
12035 && s->size != 0
12036 && s->output_section != bfd_abs_section_ptr
12037 && !bfd_set_section_contents (output_bfd, s->output_section,
12038 s->contents, s->output_offset,
12039 s->size))
12040 return FALSE;
12041 s = ppc64_elf_tdata (dynobj)->relgot;
12042 if (s != NULL
12043 && s->size != 0
12044 && s->output_section != bfd_abs_section_ptr
12045 && !bfd_set_section_contents (output_bfd, s->output_section,
12046 s->contents, s->output_offset,
12047 s->size))
12048 return FALSE;
12049 }
12050
12051 return TRUE;
12052 }
12053
12054 #include "elf64-target.h"
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