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include/elf/
[thirdparty/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009 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 asection *synthetic_opd;
2693 static bfd_boolean synthetic_relocatable;
2694
2695 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2696
2697 static int
2698 compare_symbols (const void *ap, const void *bp)
2699 {
2700 const asymbol *a = * (const asymbol **) ap;
2701 const asymbol *b = * (const asymbol **) bp;
2702
2703 /* Section symbols first. */
2704 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2705 return -1;
2706 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2707 return 1;
2708
2709 /* then .opd symbols. */
2710 if (a->section == synthetic_opd && b->section != synthetic_opd)
2711 return -1;
2712 if (a->section != synthetic_opd && b->section == synthetic_opd)
2713 return 1;
2714
2715 /* then other code symbols. */
2716 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2717 == (SEC_CODE | SEC_ALLOC)
2718 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2719 != (SEC_CODE | SEC_ALLOC))
2720 return -1;
2721
2722 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2723 != (SEC_CODE | SEC_ALLOC)
2724 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2725 == (SEC_CODE | SEC_ALLOC))
2726 return 1;
2727
2728 if (synthetic_relocatable)
2729 {
2730 if (a->section->id < b->section->id)
2731 return -1;
2732
2733 if (a->section->id > b->section->id)
2734 return 1;
2735 }
2736
2737 if (a->value + a->section->vma < b->value + b->section->vma)
2738 return -1;
2739
2740 if (a->value + a->section->vma > b->value + b->section->vma)
2741 return 1;
2742
2743 /* For syms with the same value, prefer strong dynamic global function
2744 syms over other syms. */
2745 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2746 return -1;
2747
2748 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2749 return 1;
2750
2751 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2752 return -1;
2753
2754 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2755 return 1;
2756
2757 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2758 return -1;
2759
2760 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2761 return 1;
2762
2763 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2764 return -1;
2765
2766 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2767 return 1;
2768
2769 return 0;
2770 }
2771
2772 /* Search SYMS for a symbol of the given VALUE. */
2773
2774 static asymbol *
2775 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2776 {
2777 long mid;
2778
2779 if (id == -1)
2780 {
2781 while (lo < hi)
2782 {
2783 mid = (lo + hi) >> 1;
2784 if (syms[mid]->value + syms[mid]->section->vma < value)
2785 lo = mid + 1;
2786 else if (syms[mid]->value + syms[mid]->section->vma > value)
2787 hi = mid;
2788 else
2789 return syms[mid];
2790 }
2791 }
2792 else
2793 {
2794 while (lo < hi)
2795 {
2796 mid = (lo + hi) >> 1;
2797 if (syms[mid]->section->id < id)
2798 lo = mid + 1;
2799 else if (syms[mid]->section->id > id)
2800 hi = mid;
2801 else if (syms[mid]->value < value)
2802 lo = mid + 1;
2803 else if (syms[mid]->value > value)
2804 hi = mid;
2805 else
2806 return syms[mid];
2807 }
2808 }
2809 return NULL;
2810 }
2811
2812 static bfd_boolean
2813 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2814 {
2815 bfd_vma vma = *(bfd_vma *) ptr;
2816 return ((section->flags & SEC_ALLOC) != 0
2817 && section->vma <= vma
2818 && vma < section->vma + section->size);
2819 }
2820
2821 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2822 entry syms. Also generate @plt symbols for the glink branch table. */
2823
2824 static long
2825 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2826 long static_count, asymbol **static_syms,
2827 long dyn_count, asymbol **dyn_syms,
2828 asymbol **ret)
2829 {
2830 asymbol *s;
2831 long i;
2832 long count;
2833 char *names;
2834 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2835 asection *opd;
2836 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2837 asymbol **syms;
2838
2839 *ret = NULL;
2840
2841 opd = bfd_get_section_by_name (abfd, ".opd");
2842 if (opd == NULL)
2843 return 0;
2844
2845 symcount = static_count;
2846 if (!relocatable)
2847 symcount += dyn_count;
2848 if (symcount == 0)
2849 return 0;
2850
2851 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2852 if (syms == NULL)
2853 return -1;
2854
2855 if (!relocatable && static_count != 0 && dyn_count != 0)
2856 {
2857 /* Use both symbol tables. */
2858 memcpy (syms, static_syms, static_count * sizeof (*syms));
2859 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2860 }
2861 else if (!relocatable && static_count == 0)
2862 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2863 else
2864 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2865
2866 synthetic_opd = opd;
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 (syms[i]->section == opd)
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 (syms[i]->section != opd)
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 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3037 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3038 {
3039 ++count;
3040 size += sizeof (asymbol);
3041 size += strlen (syms[i]->name) + 2;
3042 }
3043 }
3044
3045 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3046 if (dyn_count != 0
3047 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3048 {
3049 bfd_byte *dynbuf, *extdyn, *extdynend;
3050 size_t extdynsize;
3051 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3052
3053 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3054 goto free_contents_and_exit;
3055
3056 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3057 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3058
3059 extdyn = dynbuf;
3060 extdynend = extdyn + dynamic->size;
3061 for (; extdyn < extdynend; extdyn += extdynsize)
3062 {
3063 Elf_Internal_Dyn dyn;
3064 (*swap_dyn_in) (abfd, extdyn, &dyn);
3065
3066 if (dyn.d_tag == DT_NULL)
3067 break;
3068
3069 if (dyn.d_tag == DT_PPC64_GLINK)
3070 {
3071 /* The first glink stub starts at offset 32; see comment in
3072 ppc64_elf_finish_dynamic_sections. */
3073 glink_vma = dyn.d_un.d_val + 32;
3074 /* The .glink section usually does not survive the final
3075 link; search for the section (usually .text) where the
3076 glink stubs now reside. */
3077 glink = bfd_sections_find_if (abfd, section_covers_vma,
3078 &glink_vma);
3079 break;
3080 }
3081 }
3082
3083 free (dynbuf);
3084 }
3085
3086 if (glink != NULL)
3087 {
3088 /* Determine __glink trampoline by reading the relative branch
3089 from the first glink stub. */
3090 bfd_byte buf[4];
3091 if (bfd_get_section_contents (abfd, glink, buf,
3092 glink_vma + 4 - glink->vma, 4))
3093 {
3094 unsigned int insn = bfd_get_32 (abfd, buf);
3095 insn ^= B_DOT;
3096 if ((insn & ~0x3fffffc) == 0)
3097 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3098 }
3099
3100 if (resolv_vma)
3101 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3102
3103 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3104 if (relplt != NULL)
3105 {
3106 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3107 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3108 goto free_contents_and_exit;
3109
3110 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3111 size += plt_count * sizeof (asymbol);
3112
3113 p = relplt->relocation;
3114 for (i = 0; i < plt_count; i++, p++)
3115 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3116 }
3117 }
3118
3119 s = *ret = bfd_malloc (size);
3120 if (s == NULL)
3121 goto free_contents_and_exit;
3122
3123 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3124
3125 for (i = secsymend; i < opdsymend; ++i)
3126 {
3127 bfd_vma ent;
3128
3129 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3130 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3131 {
3132 long lo, hi;
3133 size_t len;
3134 asection *sec = abfd->sections;
3135
3136 *s = *syms[i];
3137 lo = codesecsym;
3138 hi = codesecsymend;
3139 while (lo < hi)
3140 {
3141 long mid = (lo + hi) >> 1;
3142 if (syms[mid]->section->vma < ent)
3143 lo = mid + 1;
3144 else if (syms[mid]->section->vma > ent)
3145 hi = mid;
3146 else
3147 {
3148 sec = syms[mid]->section;
3149 break;
3150 }
3151 }
3152
3153 if (lo >= hi && lo > codesecsym)
3154 sec = syms[lo - 1]->section;
3155
3156 for (; sec != NULL; sec = sec->next)
3157 {
3158 if (sec->vma > ent)
3159 break;
3160 if ((sec->flags & SEC_ALLOC) == 0
3161 || (sec->flags & SEC_LOAD) == 0)
3162 break;
3163 if ((sec->flags & SEC_CODE) != 0)
3164 s->section = sec;
3165 }
3166 s->flags |= BSF_SYNTHETIC;
3167 s->value = ent - s->section->vma;
3168 s->name = names;
3169 *names++ = '.';
3170 len = strlen (syms[i]->name);
3171 memcpy (names, syms[i]->name, len + 1);
3172 names += len + 1;
3173 /* Have udata.p point back to the original symbol this
3174 synthetic symbol was derived from. */
3175 s->udata.p = syms[i];
3176 s++;
3177 }
3178 }
3179 free (contents);
3180
3181 if (glink != NULL && relplt != NULL)
3182 {
3183 if (resolv_vma)
3184 {
3185 /* Add a symbol for the main glink trampoline. */
3186 memset (s, 0, sizeof *s);
3187 s->the_bfd = abfd;
3188 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3189 s->section = glink;
3190 s->value = resolv_vma - glink->vma;
3191 s->name = names;
3192 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3193 names += sizeof ("__glink_PLTresolve");
3194 s++;
3195 count++;
3196 }
3197
3198 /* FIXME: It would be very much nicer to put sym@plt on the
3199 stub rather than on the glink branch table entry. The
3200 objdump disassembler would then use a sensible symbol
3201 name on plt calls. The difficulty in doing so is
3202 a) finding the stubs, and,
3203 b) matching stubs against plt entries, and,
3204 c) there can be multiple stubs for a given plt entry.
3205
3206 Solving (a) could be done by code scanning, but older
3207 ppc64 binaries used different stubs to current code.
3208 (b) is the tricky one since you need to known the toc
3209 pointer for at least one function that uses a pic stub to
3210 be able to calculate the plt address referenced.
3211 (c) means gdb would need to set multiple breakpoints (or
3212 find the glink branch itself) when setting breakpoints
3213 for pending shared library loads. */
3214 p = relplt->relocation;
3215 for (i = 0; i < plt_count; i++, p++)
3216 {
3217 size_t len;
3218
3219 *s = **p->sym_ptr_ptr;
3220 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3221 we are defining a symbol, ensure one of them is set. */
3222 if ((s->flags & BSF_LOCAL) == 0)
3223 s->flags |= BSF_GLOBAL;
3224 s->flags |= BSF_SYNTHETIC;
3225 s->section = glink;
3226 s->value = glink_vma - glink->vma;
3227 s->name = names;
3228 s->udata.p = NULL;
3229 len = strlen ((*p->sym_ptr_ptr)->name);
3230 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3231 names += len;
3232 memcpy (names, "@plt", sizeof ("@plt"));
3233 names += sizeof ("@plt");
3234 s++;
3235 glink_vma += 8;
3236 if (i >= 0x8000)
3237 glink_vma += 4;
3238 }
3239 count += plt_count;
3240 }
3241 }
3242
3243 done:
3244 free (syms);
3245 return count;
3246 }
3247 \f
3248 /* The following functions are specific to the ELF linker, while
3249 functions above are used generally. Those named ppc64_elf_* are
3250 called by the main ELF linker code. They appear in this file more
3251 or less in the order in which they are called. eg.
3252 ppc64_elf_check_relocs is called early in the link process,
3253 ppc64_elf_finish_dynamic_sections is one of the last functions
3254 called.
3255
3256 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3257 functions have both a function code symbol and a function descriptor
3258 symbol. A call to foo in a relocatable object file looks like:
3259
3260 . .text
3261 . x:
3262 . bl .foo
3263 . nop
3264
3265 The function definition in another object file might be:
3266
3267 . .section .opd
3268 . foo: .quad .foo
3269 . .quad .TOC.@tocbase
3270 . .quad 0
3271 .
3272 . .text
3273 . .foo: blr
3274
3275 When the linker resolves the call during a static link, the branch
3276 unsurprisingly just goes to .foo and the .opd information is unused.
3277 If the function definition is in a shared library, things are a little
3278 different: The call goes via a plt call stub, the opd information gets
3279 copied to the plt, and the linker patches the nop.
3280
3281 . x:
3282 . bl .foo_stub
3283 . ld 2,40(1)
3284 .
3285 .
3286 . .foo_stub:
3287 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3288 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3289 . std 2,40(1) # this is the general idea
3290 . ld 11,0(12)
3291 . ld 2,8(12)
3292 . mtctr 11
3293 . ld 11,16(12)
3294 . bctr
3295 .
3296 . .section .plt
3297 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3298
3299 The "reloc ()" notation is supposed to indicate that the linker emits
3300 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3301 copying.
3302
3303 What are the difficulties here? Well, firstly, the relocations
3304 examined by the linker in check_relocs are against the function code
3305 sym .foo, while the dynamic relocation in the plt is emitted against
3306 the function descriptor symbol, foo. Somewhere along the line, we need
3307 to carefully copy dynamic link information from one symbol to the other.
3308 Secondly, the generic part of the elf linker will make .foo a dynamic
3309 symbol as is normal for most other backends. We need foo dynamic
3310 instead, at least for an application final link. However, when
3311 creating a shared library containing foo, we need to have both symbols
3312 dynamic so that references to .foo are satisfied during the early
3313 stages of linking. Otherwise the linker might decide to pull in a
3314 definition from some other object, eg. a static library.
3315
3316 Update: As of August 2004, we support a new convention. Function
3317 calls may use the function descriptor symbol, ie. "bl foo". This
3318 behaves exactly as "bl .foo". */
3319
3320 /* The linker needs to keep track of the number of relocs that it
3321 decides to copy as dynamic relocs in check_relocs for each symbol.
3322 This is so that it can later discard them if they are found to be
3323 unnecessary. We store the information in a field extending the
3324 regular ELF linker hash table. */
3325
3326 struct ppc_dyn_relocs
3327 {
3328 struct ppc_dyn_relocs *next;
3329
3330 /* The input section of the reloc. */
3331 asection *sec;
3332
3333 /* Total number of relocs copied for the input section. */
3334 bfd_size_type count;
3335
3336 /* Number of pc-relative relocs copied for the input section. */
3337 bfd_size_type pc_count;
3338 };
3339
3340 /* Track GOT entries needed for a given symbol. We might need more
3341 than one got entry per symbol. */
3342 struct got_entry
3343 {
3344 struct got_entry *next;
3345
3346 /* The symbol addend that we'll be placing in the GOT. */
3347 bfd_vma addend;
3348
3349 /* Unlike other ELF targets, we use separate GOT entries for the same
3350 symbol referenced from different input files. This is to support
3351 automatic multiple TOC/GOT sections, where the TOC base can vary
3352 from one input file to another. FIXME: After group_sections we
3353 ought to merge entries within the group.
3354
3355 Point to the BFD owning this GOT entry. */
3356 bfd *owner;
3357
3358 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3359 TLS_TPREL or TLS_DTPREL for tls entries. */
3360 char tls_type;
3361
3362 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3363 union
3364 {
3365 bfd_signed_vma refcount;
3366 bfd_vma offset;
3367 } got;
3368 };
3369
3370 /* The same for PLT. */
3371 struct plt_entry
3372 {
3373 struct plt_entry *next;
3374
3375 bfd_vma addend;
3376
3377 union
3378 {
3379 bfd_signed_vma refcount;
3380 bfd_vma offset;
3381 } plt;
3382 };
3383
3384 /* Of those relocs that might be copied as dynamic relocs, this function
3385 selects those that must be copied when linking a shared library,
3386 even when the symbol is local. */
3387
3388 static int
3389 must_be_dyn_reloc (struct bfd_link_info *info,
3390 enum elf_ppc64_reloc_type r_type)
3391 {
3392 switch (r_type)
3393 {
3394 default:
3395 return 1;
3396
3397 case R_PPC64_REL32:
3398 case R_PPC64_REL64:
3399 case R_PPC64_REL30:
3400 return 0;
3401
3402 case R_PPC64_TPREL16:
3403 case R_PPC64_TPREL16_LO:
3404 case R_PPC64_TPREL16_HI:
3405 case R_PPC64_TPREL16_HA:
3406 case R_PPC64_TPREL16_DS:
3407 case R_PPC64_TPREL16_LO_DS:
3408 case R_PPC64_TPREL16_HIGHER:
3409 case R_PPC64_TPREL16_HIGHERA:
3410 case R_PPC64_TPREL16_HIGHEST:
3411 case R_PPC64_TPREL16_HIGHESTA:
3412 case R_PPC64_TPREL64:
3413 return !info->executable;
3414 }
3415 }
3416
3417 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3418 copying dynamic variables from a shared lib into an app's dynbss
3419 section, and instead use a dynamic relocation to point into the
3420 shared lib. With code that gcc generates, it's vital that this be
3421 enabled; In the PowerPC64 ABI, the address of a function is actually
3422 the address of a function descriptor, which resides in the .opd
3423 section. gcc uses the descriptor directly rather than going via the
3424 GOT as some other ABI's do, which means that initialized function
3425 pointers must reference the descriptor. Thus, a function pointer
3426 initialized to the address of a function in a shared library will
3427 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3428 redefines the function descriptor symbol to point to the copy. This
3429 presents a problem as a plt entry for that function is also
3430 initialized from the function descriptor symbol and the copy reloc
3431 may not be initialized first. */
3432 #define ELIMINATE_COPY_RELOCS 1
3433
3434 /* Section name for stubs is the associated section name plus this
3435 string. */
3436 #define STUB_SUFFIX ".stub"
3437
3438 /* Linker stubs.
3439 ppc_stub_long_branch:
3440 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3441 destination, but a 24 bit branch in a stub section will reach.
3442 . b dest
3443
3444 ppc_stub_plt_branch:
3445 Similar to the above, but a 24 bit branch in the stub section won't
3446 reach its destination.
3447 . addis %r12,%r2,xxx@toc@ha
3448 . ld %r11,xxx@toc@l(%r12)
3449 . mtctr %r11
3450 . bctr
3451
3452 ppc_stub_plt_call:
3453 Used to call a function in a shared library. If it so happens that
3454 the plt entry referenced crosses a 64k boundary, then an extra
3455 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3456 . addis %r12,%r2,xxx@toc@ha
3457 . std %r2,40(%r1)
3458 . ld %r11,xxx+0@toc@l(%r12)
3459 . mtctr %r11
3460 . ld %r2,xxx+8@toc@l(%r12)
3461 . ld %r11,xxx+16@toc@l(%r12)
3462 . bctr
3463
3464 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3465 code to adjust the value and save r2 to support multiple toc sections.
3466 A ppc_stub_long_branch with an r2 offset looks like:
3467 . std %r2,40(%r1)
3468 . addis %r2,%r2,off@ha
3469 . addi %r2,%r2,off@l
3470 . b dest
3471
3472 A ppc_stub_plt_branch with an r2 offset looks like:
3473 . std %r2,40(%r1)
3474 . addis %r12,%r2,xxx@toc@ha
3475 . ld %r11,xxx@toc@l(%r12)
3476 . addis %r2,%r2,off@ha
3477 . addi %r2,%r2,off@l
3478 . mtctr %r11
3479 . bctr
3480
3481 In cases where the "addis" instruction would add zero, the "addis" is
3482 omitted and following instructions modified slightly in some cases.
3483 */
3484
3485 enum ppc_stub_type {
3486 ppc_stub_none,
3487 ppc_stub_long_branch,
3488 ppc_stub_long_branch_r2off,
3489 ppc_stub_plt_branch,
3490 ppc_stub_plt_branch_r2off,
3491 ppc_stub_plt_call
3492 };
3493
3494 struct ppc_stub_hash_entry {
3495
3496 /* Base hash table entry structure. */
3497 struct bfd_hash_entry root;
3498
3499 enum ppc_stub_type stub_type;
3500
3501 /* The stub section. */
3502 asection *stub_sec;
3503
3504 /* Offset within stub_sec of the beginning of this stub. */
3505 bfd_vma stub_offset;
3506
3507 /* Given the symbol's value and its section we can determine its final
3508 value when building the stubs (so the stub knows where to jump. */
3509 bfd_vma target_value;
3510 asection *target_section;
3511
3512 /* The symbol table entry, if any, that this was derived from. */
3513 struct ppc_link_hash_entry *h;
3514
3515 /* And the reloc addend that this was derived from. */
3516 bfd_vma addend;
3517
3518 /* Where this stub is being called from, or, in the case of combined
3519 stub sections, the first input section in the group. */
3520 asection *id_sec;
3521 };
3522
3523 struct ppc_branch_hash_entry {
3524
3525 /* Base hash table entry structure. */
3526 struct bfd_hash_entry root;
3527
3528 /* Offset within branch lookup table. */
3529 unsigned int offset;
3530
3531 /* Generation marker. */
3532 unsigned int iter;
3533 };
3534
3535 struct ppc_link_hash_entry
3536 {
3537 struct elf_link_hash_entry elf;
3538
3539 union {
3540 /* A pointer to the most recently used stub hash entry against this
3541 symbol. */
3542 struct ppc_stub_hash_entry *stub_cache;
3543
3544 /* A pointer to the next symbol starting with a '.' */
3545 struct ppc_link_hash_entry *next_dot_sym;
3546 } u;
3547
3548 /* Track dynamic relocs copied for this symbol. */
3549 struct ppc_dyn_relocs *dyn_relocs;
3550
3551 /* Link between function code and descriptor symbols. */
3552 struct ppc_link_hash_entry *oh;
3553
3554 /* Flag function code and descriptor symbols. */
3555 unsigned int is_func:1;
3556 unsigned int is_func_descriptor:1;
3557 unsigned int fake:1;
3558
3559 /* Whether global opd/toc sym has been adjusted or not.
3560 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3561 should be set for all globals defined in any opd/toc section. */
3562 unsigned int adjust_done:1;
3563
3564 /* Set if we twiddled this symbol to weak at some stage. */
3565 unsigned int was_undefined:1;
3566
3567 /* Contexts in which symbol is used in the GOT (or TOC).
3568 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3569 corresponding relocs are encountered during check_relocs.
3570 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3571 indicate the corresponding GOT entry type is not needed.
3572 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3573 a TPREL one. We use a separate flag rather than setting TPREL
3574 just for convenience in distinguishing the two cases. */
3575 #define TLS_GD 1 /* GD reloc. */
3576 #define TLS_LD 2 /* LD reloc. */
3577 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3578 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3579 #define TLS_TLS 16 /* Any TLS reloc. */
3580 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3581 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3582 char tls_mask;
3583 };
3584
3585 /* ppc64 ELF linker hash table. */
3586
3587 struct ppc_link_hash_table
3588 {
3589 struct elf_link_hash_table elf;
3590
3591 /* The stub hash table. */
3592 struct bfd_hash_table stub_hash_table;
3593
3594 /* Another hash table for plt_branch stubs. */
3595 struct bfd_hash_table branch_hash_table;
3596
3597 /* Linker stub bfd. */
3598 bfd *stub_bfd;
3599
3600 /* Linker call-backs. */
3601 asection * (*add_stub_section) (const char *, asection *);
3602 void (*layout_sections_again) (void);
3603
3604 /* Array to keep track of which stub sections have been created, and
3605 information on stub grouping. */
3606 struct map_stub {
3607 /* This is the section to which stubs in the group will be attached. */
3608 asection *link_sec;
3609 /* The stub section. */
3610 asection *stub_sec;
3611 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3612 bfd_vma toc_off;
3613 } *stub_group;
3614
3615 /* Temp used when calculating TOC pointers. */
3616 bfd_vma toc_curr;
3617
3618 /* Highest input section id. */
3619 int top_id;
3620
3621 /* Highest output section index. */
3622 int top_index;
3623
3624 /* Used when adding symbols. */
3625 struct ppc_link_hash_entry *dot_syms;
3626
3627 /* List of input sections for each output section. */
3628 asection **input_list;
3629
3630 /* Short-cuts to get to dynamic linker sections. */
3631 asection *got;
3632 asection *plt;
3633 asection *relplt;
3634 asection *dynbss;
3635 asection *relbss;
3636 asection *glink;
3637 asection *sfpr;
3638 asection *brlt;
3639 asection *relbrlt;
3640
3641 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3642 struct ppc_link_hash_entry *tls_get_addr;
3643 struct ppc_link_hash_entry *tls_get_addr_fd;
3644
3645 /* Statistics. */
3646 unsigned long stub_count[ppc_stub_plt_call];
3647
3648 /* Number of stubs against global syms. */
3649 unsigned long stub_globals;
3650
3651 /* Set if we should emit symbols for stubs. */
3652 unsigned int emit_stub_syms:1;
3653
3654 /* Support for multiple toc sections. */
3655 unsigned int no_multi_toc:1;
3656 unsigned int multi_toc_needed:1;
3657
3658 /* Set on error. */
3659 unsigned int stub_error:1;
3660
3661 /* Temp used by ppc64_elf_process_dot_syms. */
3662 unsigned int twiddled_syms:1;
3663
3664 /* Incremented every time we size stubs. */
3665 unsigned int stub_iteration;
3666
3667 /* Small local sym to section mapping cache. */
3668 struct sym_sec_cache sym_sec;
3669 };
3670
3671 /* Rename some of the generic section flags to better document how they
3672 are used here. */
3673 #define has_toc_reloc has_gp_reloc
3674 #define makes_toc_func_call need_finalize_relax
3675 #define call_check_in_progress reloc_done
3676
3677 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3678
3679 #define ppc_hash_table(p) \
3680 ((struct ppc_link_hash_table *) ((p)->hash))
3681
3682 #define ppc_stub_hash_lookup(table, string, create, copy) \
3683 ((struct ppc_stub_hash_entry *) \
3684 bfd_hash_lookup ((table), (string), (create), (copy)))
3685
3686 #define ppc_branch_hash_lookup(table, string, create, copy) \
3687 ((struct ppc_branch_hash_entry *) \
3688 bfd_hash_lookup ((table), (string), (create), (copy)))
3689
3690 /* Create an entry in the stub hash table. */
3691
3692 static struct bfd_hash_entry *
3693 stub_hash_newfunc (struct bfd_hash_entry *entry,
3694 struct bfd_hash_table *table,
3695 const char *string)
3696 {
3697 /* Allocate the structure if it has not already been allocated by a
3698 subclass. */
3699 if (entry == NULL)
3700 {
3701 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3702 if (entry == NULL)
3703 return entry;
3704 }
3705
3706 /* Call the allocation method of the superclass. */
3707 entry = bfd_hash_newfunc (entry, table, string);
3708 if (entry != NULL)
3709 {
3710 struct ppc_stub_hash_entry *eh;
3711
3712 /* Initialize the local fields. */
3713 eh = (struct ppc_stub_hash_entry *) entry;
3714 eh->stub_type = ppc_stub_none;
3715 eh->stub_sec = NULL;
3716 eh->stub_offset = 0;
3717 eh->target_value = 0;
3718 eh->target_section = NULL;
3719 eh->h = NULL;
3720 eh->id_sec = NULL;
3721 }
3722
3723 return entry;
3724 }
3725
3726 /* Create an entry in the branch hash table. */
3727
3728 static struct bfd_hash_entry *
3729 branch_hash_newfunc (struct bfd_hash_entry *entry,
3730 struct bfd_hash_table *table,
3731 const char *string)
3732 {
3733 /* Allocate the structure if it has not already been allocated by a
3734 subclass. */
3735 if (entry == NULL)
3736 {
3737 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3738 if (entry == NULL)
3739 return entry;
3740 }
3741
3742 /* Call the allocation method of the superclass. */
3743 entry = bfd_hash_newfunc (entry, table, string);
3744 if (entry != NULL)
3745 {
3746 struct ppc_branch_hash_entry *eh;
3747
3748 /* Initialize the local fields. */
3749 eh = (struct ppc_branch_hash_entry *) entry;
3750 eh->offset = 0;
3751 eh->iter = 0;
3752 }
3753
3754 return entry;
3755 }
3756
3757 /* Create an entry in a ppc64 ELF linker hash table. */
3758
3759 static struct bfd_hash_entry *
3760 link_hash_newfunc (struct bfd_hash_entry *entry,
3761 struct bfd_hash_table *table,
3762 const char *string)
3763 {
3764 /* Allocate the structure if it has not already been allocated by a
3765 subclass. */
3766 if (entry == NULL)
3767 {
3768 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3769 if (entry == NULL)
3770 return entry;
3771 }
3772
3773 /* Call the allocation method of the superclass. */
3774 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3775 if (entry != NULL)
3776 {
3777 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3778
3779 memset (&eh->u.stub_cache, 0,
3780 (sizeof (struct ppc_link_hash_entry)
3781 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3782
3783 /* When making function calls, old ABI code references function entry
3784 points (dot symbols), while new ABI code references the function
3785 descriptor symbol. We need to make any combination of reference and
3786 definition work together, without breaking archive linking.
3787
3788 For a defined function "foo" and an undefined call to "bar":
3789 An old object defines "foo" and ".foo", references ".bar" (possibly
3790 "bar" too).
3791 A new object defines "foo" and references "bar".
3792
3793 A new object thus has no problem with its undefined symbols being
3794 satisfied by definitions in an old object. On the other hand, the
3795 old object won't have ".bar" satisfied by a new object.
3796
3797 Keep a list of newly added dot-symbols. */
3798
3799 if (string[0] == '.')
3800 {
3801 struct ppc_link_hash_table *htab;
3802
3803 htab = (struct ppc_link_hash_table *) table;
3804 eh->u.next_dot_sym = htab->dot_syms;
3805 htab->dot_syms = eh;
3806 }
3807 }
3808
3809 return entry;
3810 }
3811
3812 /* Create a ppc64 ELF linker hash table. */
3813
3814 static struct bfd_link_hash_table *
3815 ppc64_elf_link_hash_table_create (bfd *abfd)
3816 {
3817 struct ppc_link_hash_table *htab;
3818 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3819
3820 htab = bfd_zmalloc (amt);
3821 if (htab == NULL)
3822 return NULL;
3823
3824 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3825 sizeof (struct ppc_link_hash_entry)))
3826 {
3827 free (htab);
3828 return NULL;
3829 }
3830
3831 /* Init the stub hash table too. */
3832 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3833 sizeof (struct ppc_stub_hash_entry)))
3834 return NULL;
3835
3836 /* And the branch hash table. */
3837 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3838 sizeof (struct ppc_branch_hash_entry)))
3839 return NULL;
3840
3841 /* Initializing two fields of the union is just cosmetic. We really
3842 only care about glist, but when compiled on a 32-bit host the
3843 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3844 debugger inspection of these fields look nicer. */
3845 htab->elf.init_got_refcount.refcount = 0;
3846 htab->elf.init_got_refcount.glist = NULL;
3847 htab->elf.init_plt_refcount.refcount = 0;
3848 htab->elf.init_plt_refcount.glist = NULL;
3849 htab->elf.init_got_offset.offset = 0;
3850 htab->elf.init_got_offset.glist = NULL;
3851 htab->elf.init_plt_offset.offset = 0;
3852 htab->elf.init_plt_offset.glist = NULL;
3853
3854 return &htab->elf.root;
3855 }
3856
3857 /* Free the derived linker hash table. */
3858
3859 static void
3860 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3861 {
3862 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3863
3864 bfd_hash_table_free (&ret->stub_hash_table);
3865 bfd_hash_table_free (&ret->branch_hash_table);
3866 _bfd_generic_link_hash_table_free (hash);
3867 }
3868
3869 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3870
3871 void
3872 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3873 {
3874 struct ppc_link_hash_table *htab;
3875
3876 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3877
3878 /* Always hook our dynamic sections into the first bfd, which is the
3879 linker created stub bfd. This ensures that the GOT header is at
3880 the start of the output TOC section. */
3881 htab = ppc_hash_table (info);
3882 htab->stub_bfd = abfd;
3883 htab->elf.dynobj = abfd;
3884 }
3885
3886 /* Build a name for an entry in the stub hash table. */
3887
3888 static char *
3889 ppc_stub_name (const asection *input_section,
3890 const asection *sym_sec,
3891 const struct ppc_link_hash_entry *h,
3892 const Elf_Internal_Rela *rel)
3893 {
3894 char *stub_name;
3895 bfd_size_type len;
3896
3897 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3898 offsets from a sym as a branch target? In fact, we could
3899 probably assume the addend is always zero. */
3900 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3901
3902 if (h)
3903 {
3904 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3905 stub_name = bfd_malloc (len);
3906 if (stub_name == NULL)
3907 return stub_name;
3908
3909 sprintf (stub_name, "%08x.%s+%x",
3910 input_section->id & 0xffffffff,
3911 h->elf.root.root.string,
3912 (int) rel->r_addend & 0xffffffff);
3913 }
3914 else
3915 {
3916 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3917 stub_name = bfd_malloc (len);
3918 if (stub_name == NULL)
3919 return stub_name;
3920
3921 sprintf (stub_name, "%08x.%x:%x+%x",
3922 input_section->id & 0xffffffff,
3923 sym_sec->id & 0xffffffff,
3924 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3925 (int) rel->r_addend & 0xffffffff);
3926 }
3927 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3928 stub_name[len - 2] = 0;
3929 return stub_name;
3930 }
3931
3932 /* Look up an entry in the stub hash. Stub entries are cached because
3933 creating the stub name takes a bit of time. */
3934
3935 static struct ppc_stub_hash_entry *
3936 ppc_get_stub_entry (const asection *input_section,
3937 const asection *sym_sec,
3938 struct ppc_link_hash_entry *h,
3939 const Elf_Internal_Rela *rel,
3940 struct ppc_link_hash_table *htab)
3941 {
3942 struct ppc_stub_hash_entry *stub_entry;
3943 const asection *id_sec;
3944
3945 /* If this input section is part of a group of sections sharing one
3946 stub section, then use the id of the first section in the group.
3947 Stub names need to include a section id, as there may well be
3948 more than one stub used to reach say, printf, and we need to
3949 distinguish between them. */
3950 id_sec = htab->stub_group[input_section->id].link_sec;
3951
3952 if (h != NULL && h->u.stub_cache != NULL
3953 && h->u.stub_cache->h == h
3954 && h->u.stub_cache->id_sec == id_sec)
3955 {
3956 stub_entry = h->u.stub_cache;
3957 }
3958 else
3959 {
3960 char *stub_name;
3961
3962 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3963 if (stub_name == NULL)
3964 return NULL;
3965
3966 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3967 stub_name, FALSE, FALSE);
3968 if (h != NULL)
3969 h->u.stub_cache = stub_entry;
3970
3971 free (stub_name);
3972 }
3973
3974 return stub_entry;
3975 }
3976
3977 /* Add a new stub entry to the stub hash. Not all fields of the new
3978 stub entry are initialised. */
3979
3980 static struct ppc_stub_hash_entry *
3981 ppc_add_stub (const char *stub_name,
3982 asection *section,
3983 struct ppc_link_hash_table *htab)
3984 {
3985 asection *link_sec;
3986 asection *stub_sec;
3987 struct ppc_stub_hash_entry *stub_entry;
3988
3989 link_sec = htab->stub_group[section->id].link_sec;
3990 stub_sec = htab->stub_group[section->id].stub_sec;
3991 if (stub_sec == NULL)
3992 {
3993 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3994 if (stub_sec == NULL)
3995 {
3996 size_t namelen;
3997 bfd_size_type len;
3998 char *s_name;
3999
4000 namelen = strlen (link_sec->name);
4001 len = namelen + sizeof (STUB_SUFFIX);
4002 s_name = bfd_alloc (htab->stub_bfd, len);
4003 if (s_name == NULL)
4004 return NULL;
4005
4006 memcpy (s_name, link_sec->name, namelen);
4007 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4008 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4009 if (stub_sec == NULL)
4010 return NULL;
4011 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4012 }
4013 htab->stub_group[section->id].stub_sec = stub_sec;
4014 }
4015
4016 /* Enter this entry into the linker stub hash table. */
4017 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4018 TRUE, FALSE);
4019 if (stub_entry == NULL)
4020 {
4021 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
4022 section->owner, stub_name);
4023 return NULL;
4024 }
4025
4026 stub_entry->stub_sec = stub_sec;
4027 stub_entry->stub_offset = 0;
4028 stub_entry->id_sec = link_sec;
4029 return stub_entry;
4030 }
4031
4032 /* Create sections for linker generated code. */
4033
4034 static bfd_boolean
4035 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4036 {
4037 struct ppc_link_hash_table *htab;
4038 flagword flags;
4039
4040 htab = ppc_hash_table (info);
4041
4042 /* Create .sfpr for code to save and restore fp regs. */
4043 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4044 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4045 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4046 flags);
4047 if (htab->sfpr == NULL
4048 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4049 return FALSE;
4050
4051 /* Create .glink for lazy dynamic linking support. */
4052 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4053 flags);
4054 if (htab->glink == NULL
4055 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4056 return FALSE;
4057
4058 /* Create branch lookup table for plt_branch stubs. */
4059 flags = (SEC_ALLOC | SEC_LOAD
4060 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4061 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4062 flags);
4063 if (htab->brlt == NULL
4064 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4065 return FALSE;
4066
4067 if (!info->shared)
4068 return TRUE;
4069
4070 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4071 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4072 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4073 ".rela.branch_lt",
4074 flags);
4075 if (!htab->relbrlt
4076 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4077 return FALSE;
4078
4079 return TRUE;
4080 }
4081
4082 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4083 not already done. */
4084
4085 static bfd_boolean
4086 create_got_section (bfd *abfd, struct bfd_link_info *info)
4087 {
4088 asection *got, *relgot;
4089 flagword flags;
4090 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4091
4092 if (!is_ppc64_elf (abfd))
4093 return FALSE;
4094
4095 if (!htab->got)
4096 {
4097 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4098 return FALSE;
4099
4100 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4101 if (!htab->got)
4102 abort ();
4103 }
4104
4105 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4106 | SEC_LINKER_CREATED);
4107
4108 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4109 if (!got
4110 || !bfd_set_section_alignment (abfd, got, 3))
4111 return FALSE;
4112
4113 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4114 flags | SEC_READONLY);
4115 if (!relgot
4116 || ! bfd_set_section_alignment (abfd, relgot, 3))
4117 return FALSE;
4118
4119 ppc64_elf_tdata (abfd)->got = got;
4120 ppc64_elf_tdata (abfd)->relgot = relgot;
4121 return TRUE;
4122 }
4123
4124 /* Create the dynamic sections, and set up shortcuts. */
4125
4126 static bfd_boolean
4127 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4128 {
4129 struct ppc_link_hash_table *htab;
4130
4131 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4132 return FALSE;
4133
4134 htab = ppc_hash_table (info);
4135 if (!htab->got)
4136 htab->got = bfd_get_section_by_name (dynobj, ".got");
4137 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4138 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4139 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4140 if (!info->shared)
4141 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4142
4143 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4144 || (!info->shared && !htab->relbss))
4145 abort ();
4146
4147 return TRUE;
4148 }
4149
4150 /* Merge PLT info on FROM with that on TO. */
4151
4152 static void
4153 move_plt_plist (struct ppc_link_hash_entry *from,
4154 struct ppc_link_hash_entry *to)
4155 {
4156 if (from->elf.plt.plist != NULL)
4157 {
4158 if (to->elf.plt.plist != NULL)
4159 {
4160 struct plt_entry **entp;
4161 struct plt_entry *ent;
4162
4163 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4164 {
4165 struct plt_entry *dent;
4166
4167 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4168 if (dent->addend == ent->addend)
4169 {
4170 dent->plt.refcount += ent->plt.refcount;
4171 *entp = ent->next;
4172 break;
4173 }
4174 if (dent == NULL)
4175 entp = &ent->next;
4176 }
4177 *entp = to->elf.plt.plist;
4178 }
4179
4180 to->elf.plt.plist = from->elf.plt.plist;
4181 from->elf.plt.plist = NULL;
4182 }
4183 }
4184
4185 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4186
4187 static void
4188 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4189 struct elf_link_hash_entry *dir,
4190 struct elf_link_hash_entry *ind)
4191 {
4192 struct ppc_link_hash_entry *edir, *eind;
4193
4194 edir = (struct ppc_link_hash_entry *) dir;
4195 eind = (struct ppc_link_hash_entry *) ind;
4196
4197 /* Copy over any dynamic relocs we may have on the indirect sym. */
4198 if (eind->dyn_relocs != NULL)
4199 {
4200 if (edir->dyn_relocs != NULL)
4201 {
4202 struct ppc_dyn_relocs **pp;
4203 struct ppc_dyn_relocs *p;
4204
4205 /* Add reloc counts against the indirect sym to the direct sym
4206 list. Merge any entries against the same section. */
4207 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4208 {
4209 struct ppc_dyn_relocs *q;
4210
4211 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4212 if (q->sec == p->sec)
4213 {
4214 q->pc_count += p->pc_count;
4215 q->count += p->count;
4216 *pp = p->next;
4217 break;
4218 }
4219 if (q == NULL)
4220 pp = &p->next;
4221 }
4222 *pp = edir->dyn_relocs;
4223 }
4224
4225 edir->dyn_relocs = eind->dyn_relocs;
4226 eind->dyn_relocs = NULL;
4227 }
4228
4229 edir->is_func |= eind->is_func;
4230 edir->is_func_descriptor |= eind->is_func_descriptor;
4231 edir->tls_mask |= eind->tls_mask;
4232
4233 /* If called to transfer flags for a weakdef during processing
4234 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4235 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4236 if (!(ELIMINATE_COPY_RELOCS
4237 && eind->elf.root.type != bfd_link_hash_indirect
4238 && edir->elf.dynamic_adjusted))
4239 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4240
4241 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4242 edir->elf.ref_regular |= eind->elf.ref_regular;
4243 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4244 edir->elf.needs_plt |= eind->elf.needs_plt;
4245
4246 /* If we were called to copy over info for a weak sym, that's all. */
4247 if (eind->elf.root.type != bfd_link_hash_indirect)
4248 return;
4249
4250 /* Copy over got entries that we may have already seen to the
4251 symbol which just became indirect. */
4252 if (eind->elf.got.glist != NULL)
4253 {
4254 if (edir->elf.got.glist != NULL)
4255 {
4256 struct got_entry **entp;
4257 struct got_entry *ent;
4258
4259 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4260 {
4261 struct got_entry *dent;
4262
4263 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4264 if (dent->addend == ent->addend
4265 && dent->owner == ent->owner
4266 && dent->tls_type == ent->tls_type)
4267 {
4268 dent->got.refcount += ent->got.refcount;
4269 *entp = ent->next;
4270 break;
4271 }
4272 if (dent == NULL)
4273 entp = &ent->next;
4274 }
4275 *entp = edir->elf.got.glist;
4276 }
4277
4278 edir->elf.got.glist = eind->elf.got.glist;
4279 eind->elf.got.glist = NULL;
4280 }
4281
4282 /* And plt entries. */
4283 move_plt_plist (eind, edir);
4284
4285 if (eind->elf.dynindx != -1)
4286 {
4287 if (edir->elf.dynindx != -1)
4288 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4289 edir->elf.dynstr_index);
4290 edir->elf.dynindx = eind->elf.dynindx;
4291 edir->elf.dynstr_index = eind->elf.dynstr_index;
4292 eind->elf.dynindx = -1;
4293 eind->elf.dynstr_index = 0;
4294 }
4295 }
4296
4297 /* Find the function descriptor hash entry from the given function code
4298 hash entry FH. Link the entries via their OH fields. */
4299
4300 static struct ppc_link_hash_entry *
4301 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4302 {
4303 struct ppc_link_hash_entry *fdh = fh->oh;
4304
4305 if (fdh == NULL)
4306 {
4307 const char *fd_name = fh->elf.root.root.string + 1;
4308
4309 fdh = (struct ppc_link_hash_entry *)
4310 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4311 if (fdh != NULL)
4312 {
4313 fdh->is_func_descriptor = 1;
4314 fdh->oh = fh;
4315 fh->is_func = 1;
4316 fh->oh = fdh;
4317 }
4318 }
4319
4320 return fdh;
4321 }
4322
4323 /* Make a fake function descriptor sym for the code sym FH. */
4324
4325 static struct ppc_link_hash_entry *
4326 make_fdh (struct bfd_link_info *info,
4327 struct ppc_link_hash_entry *fh)
4328 {
4329 bfd *abfd;
4330 asymbol *newsym;
4331 struct bfd_link_hash_entry *bh;
4332 struct ppc_link_hash_entry *fdh;
4333
4334 abfd = fh->elf.root.u.undef.abfd;
4335 newsym = bfd_make_empty_symbol (abfd);
4336 newsym->name = fh->elf.root.root.string + 1;
4337 newsym->section = bfd_und_section_ptr;
4338 newsym->value = 0;
4339 newsym->flags = BSF_WEAK;
4340
4341 bh = NULL;
4342 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4343 newsym->flags, newsym->section,
4344 newsym->value, NULL, FALSE, FALSE,
4345 &bh))
4346 return NULL;
4347
4348 fdh = (struct ppc_link_hash_entry *) bh;
4349 fdh->elf.non_elf = 0;
4350 fdh->fake = 1;
4351 fdh->is_func_descriptor = 1;
4352 fdh->oh = fh;
4353 fh->is_func = 1;
4354 fh->oh = fdh;
4355 return fdh;
4356 }
4357
4358 /* Fix function descriptor symbols defined in .opd sections to be
4359 function type. */
4360
4361 static bfd_boolean
4362 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4363 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4364 Elf_Internal_Sym *isym,
4365 const char **name ATTRIBUTE_UNUSED,
4366 flagword *flags ATTRIBUTE_UNUSED,
4367 asection **sec,
4368 bfd_vma *value ATTRIBUTE_UNUSED)
4369 {
4370 if (*sec != NULL
4371 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4372 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4373
4374 return TRUE;
4375 }
4376
4377 /* This function makes an old ABI object reference to ".bar" cause the
4378 inclusion of a new ABI object archive that defines "bar".
4379 NAME is a symbol defined in an archive. Return a symbol in the hash
4380 table that might be satisfied by the archive symbols. */
4381
4382 static struct elf_link_hash_entry *
4383 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4384 struct bfd_link_info *info,
4385 const char *name)
4386 {
4387 struct elf_link_hash_entry *h;
4388 char *dot_name;
4389 size_t len;
4390
4391 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4392 if (h != NULL
4393 /* Don't return this sym if it is a fake function descriptor
4394 created by add_symbol_adjust. */
4395 && !(h->root.type == bfd_link_hash_undefweak
4396 && ((struct ppc_link_hash_entry *) h)->fake))
4397 return h;
4398
4399 if (name[0] == '.')
4400 return h;
4401
4402 len = strlen (name);
4403 dot_name = bfd_alloc (abfd, len + 2);
4404 if (dot_name == NULL)
4405 return (struct elf_link_hash_entry *) 0 - 1;
4406 dot_name[0] = '.';
4407 memcpy (dot_name + 1, name, len + 1);
4408 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4409 bfd_release (abfd, dot_name);
4410 return h;
4411 }
4412
4413 /* This function satisfies all old ABI object references to ".bar" if a
4414 new ABI object defines "bar". Well, at least, undefined dot symbols
4415 are made weak. This stops later archive searches from including an
4416 object if we already have a function descriptor definition. It also
4417 prevents the linker complaining about undefined symbols.
4418 We also check and correct mismatched symbol visibility here. The
4419 most restrictive visibility of the function descriptor and the
4420 function entry symbol is used. */
4421
4422 static bfd_boolean
4423 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4424 {
4425 struct ppc_link_hash_table *htab;
4426 struct ppc_link_hash_entry *fdh;
4427
4428 if (eh->elf.root.type == bfd_link_hash_indirect)
4429 return TRUE;
4430
4431 if (eh->elf.root.type == bfd_link_hash_warning)
4432 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4433
4434 if (eh->elf.root.root.string[0] != '.')
4435 abort ();
4436
4437 htab = ppc_hash_table (info);
4438 fdh = get_fdh (eh, htab);
4439 if (fdh == NULL
4440 && !info->relocatable
4441 && (eh->elf.root.type == bfd_link_hash_undefined
4442 || eh->elf.root.type == bfd_link_hash_undefweak)
4443 && eh->elf.ref_regular)
4444 {
4445 /* Make an undefweak function descriptor sym, which is enough to
4446 pull in an --as-needed shared lib, but won't cause link
4447 errors. Archives are handled elsewhere. */
4448 fdh = make_fdh (info, eh);
4449 if (fdh == NULL)
4450 return FALSE;
4451 else
4452 fdh->elf.ref_regular = 1;
4453 }
4454 else if (fdh != NULL)
4455 {
4456 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4457 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4458 if (entry_vis < descr_vis)
4459 fdh->elf.other += entry_vis - descr_vis;
4460 else if (entry_vis > descr_vis)
4461 eh->elf.other += descr_vis - entry_vis;
4462
4463 if ((fdh->elf.root.type == bfd_link_hash_defined
4464 || fdh->elf.root.type == bfd_link_hash_defweak)
4465 && eh->elf.root.type == bfd_link_hash_undefined)
4466 {
4467 eh->elf.root.type = bfd_link_hash_undefweak;
4468 eh->was_undefined = 1;
4469 htab->twiddled_syms = 1;
4470 }
4471 }
4472
4473 return TRUE;
4474 }
4475
4476 /* Process list of dot-symbols we made in link_hash_newfunc. */
4477
4478 static bfd_boolean
4479 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4480 {
4481 struct ppc_link_hash_table *htab;
4482 struct ppc_link_hash_entry **p, *eh;
4483
4484 htab = ppc_hash_table (info);
4485 if (!is_ppc64_elf (info->output_bfd))
4486 return TRUE;
4487
4488 if (is_ppc64_elf (ibfd))
4489 {
4490 p = &htab->dot_syms;
4491 while ((eh = *p) != NULL)
4492 {
4493 *p = NULL;
4494 if (!add_symbol_adjust (eh, info))
4495 return FALSE;
4496 p = &eh->u.next_dot_sym;
4497 }
4498 }
4499
4500 /* Clear the list for non-ppc64 input files. */
4501 p = &htab->dot_syms;
4502 while ((eh = *p) != NULL)
4503 {
4504 *p = NULL;
4505 p = &eh->u.next_dot_sym;
4506 }
4507
4508 /* We need to fix the undefs list for any syms we have twiddled to
4509 undef_weak. */
4510 if (htab->twiddled_syms)
4511 {
4512 bfd_link_repair_undef_list (&htab->elf.root);
4513 htab->twiddled_syms = 0;
4514 }
4515 return TRUE;
4516 }
4517
4518 /* Undo hash table changes when an --as-needed input file is determined
4519 not to be needed. */
4520
4521 static bfd_boolean
4522 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4523 struct bfd_link_info *info)
4524 {
4525 ppc_hash_table (info)->dot_syms = NULL;
4526 return TRUE;
4527 }
4528
4529 static bfd_boolean
4530 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4531 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4532 {
4533 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4534 char *local_got_tls_masks;
4535
4536 if (local_got_ents == NULL)
4537 {
4538 bfd_size_type size = symtab_hdr->sh_info;
4539
4540 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4541 local_got_ents = bfd_zalloc (abfd, size);
4542 if (local_got_ents == NULL)
4543 return FALSE;
4544 elf_local_got_ents (abfd) = local_got_ents;
4545 }
4546
4547 if ((tls_type & TLS_EXPLICIT) == 0)
4548 {
4549 struct got_entry *ent;
4550
4551 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4552 if (ent->addend == r_addend
4553 && ent->owner == abfd
4554 && ent->tls_type == tls_type)
4555 break;
4556 if (ent == NULL)
4557 {
4558 bfd_size_type amt = sizeof (*ent);
4559 ent = bfd_alloc (abfd, amt);
4560 if (ent == NULL)
4561 return FALSE;
4562 ent->next = local_got_ents[r_symndx];
4563 ent->addend = r_addend;
4564 ent->owner = abfd;
4565 ent->tls_type = tls_type;
4566 ent->got.refcount = 0;
4567 local_got_ents[r_symndx] = ent;
4568 }
4569 ent->got.refcount += 1;
4570 }
4571
4572 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4573 local_got_tls_masks[r_symndx] |= tls_type;
4574 return TRUE;
4575 }
4576
4577 static bfd_boolean
4578 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4579 {
4580 struct plt_entry *ent;
4581
4582 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4583 if (ent->addend == addend)
4584 break;
4585 if (ent == NULL)
4586 {
4587 bfd_size_type amt = sizeof (*ent);
4588 ent = bfd_alloc (abfd, amt);
4589 if (ent == NULL)
4590 return FALSE;
4591 ent->next = eh->elf.plt.plist;
4592 ent->addend = addend;
4593 ent->plt.refcount = 0;
4594 eh->elf.plt.plist = ent;
4595 }
4596 ent->plt.refcount += 1;
4597 eh->elf.needs_plt = 1;
4598 if (eh->elf.root.root.string[0] == '.'
4599 && eh->elf.root.root.string[1] != '\0')
4600 eh->is_func = 1;
4601 return TRUE;
4602 }
4603
4604 /* Look through the relocs for a section during the first phase, and
4605 calculate needed space in the global offset table, procedure
4606 linkage table, and dynamic reloc sections. */
4607
4608 static bfd_boolean
4609 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4610 asection *sec, const Elf_Internal_Rela *relocs)
4611 {
4612 struct ppc_link_hash_table *htab;
4613 Elf_Internal_Shdr *symtab_hdr;
4614 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4615 const Elf_Internal_Rela *rel;
4616 const Elf_Internal_Rela *rel_end;
4617 asection *sreloc;
4618 asection **opd_sym_map;
4619 struct elf_link_hash_entry *tga, *dottga;
4620
4621 if (info->relocatable)
4622 return TRUE;
4623
4624 /* Don't do anything special with non-loaded, non-alloced sections.
4625 In particular, any relocs in such sections should not affect GOT
4626 and PLT reference counting (ie. we don't allow them to create GOT
4627 or PLT entries), there's no possibility or desire to optimize TLS
4628 relocs, and there's not much point in propagating relocs to shared
4629 libs that the dynamic linker won't relocate. */
4630 if ((sec->flags & SEC_ALLOC) == 0)
4631 return TRUE;
4632
4633 BFD_ASSERT (is_ppc64_elf (abfd));
4634
4635 htab = ppc_hash_table (info);
4636 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4637 FALSE, FALSE, TRUE);
4638 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4639 FALSE, FALSE, TRUE);
4640 symtab_hdr = &elf_symtab_hdr (abfd);
4641
4642 sym_hashes = elf_sym_hashes (abfd);
4643 sym_hashes_end = (sym_hashes
4644 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4645 - symtab_hdr->sh_info);
4646
4647 sreloc = NULL;
4648 opd_sym_map = NULL;
4649 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4650 {
4651 /* Garbage collection needs some extra help with .opd sections.
4652 We don't want to necessarily keep everything referenced by
4653 relocs in .opd, as that would keep all functions. Instead,
4654 if we reference an .opd symbol (a function descriptor), we
4655 want to keep the function code symbol's section. This is
4656 easy for global symbols, but for local syms we need to keep
4657 information about the associated function section. */
4658 bfd_size_type amt;
4659
4660 amt = sec->size * sizeof (*opd_sym_map) / 8;
4661 opd_sym_map = bfd_zalloc (abfd, amt);
4662 if (opd_sym_map == NULL)
4663 return FALSE;
4664 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4665 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4666 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4667 }
4668
4669 if (htab->sfpr == NULL
4670 && !create_linkage_sections (htab->elf.dynobj, info))
4671 return FALSE;
4672
4673 rel_end = relocs + sec->reloc_count;
4674 for (rel = relocs; rel < rel_end; rel++)
4675 {
4676 unsigned long r_symndx;
4677 struct elf_link_hash_entry *h;
4678 enum elf_ppc64_reloc_type r_type;
4679 int tls_type;
4680 struct _ppc64_elf_section_data *ppc64_sec;
4681
4682 r_symndx = ELF64_R_SYM (rel->r_info);
4683 if (r_symndx < symtab_hdr->sh_info)
4684 h = NULL;
4685 else
4686 {
4687 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4688 while (h->root.type == bfd_link_hash_indirect
4689 || h->root.type == bfd_link_hash_warning)
4690 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4691 }
4692
4693 tls_type = 0;
4694 r_type = ELF64_R_TYPE (rel->r_info);
4695 if (h != NULL && (h == tga || h == dottga))
4696 switch (r_type)
4697 {
4698 default:
4699 break;
4700
4701 case R_PPC64_REL24:
4702 case R_PPC64_REL14:
4703 case R_PPC64_REL14_BRTAKEN:
4704 case R_PPC64_REL14_BRNTAKEN:
4705 case R_PPC64_ADDR24:
4706 case R_PPC64_ADDR14:
4707 case R_PPC64_ADDR14_BRTAKEN:
4708 case R_PPC64_ADDR14_BRNTAKEN:
4709 if (rel != relocs
4710 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4711 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4712 /* We have a new-style __tls_get_addr call with a marker
4713 reloc. */
4714 ;
4715 else
4716 /* Mark this section as having an old-style call. */
4717 sec->has_tls_get_addr_call = 1;
4718 break;
4719 }
4720
4721 switch (r_type)
4722 {
4723 case R_PPC64_TLSGD:
4724 case R_PPC64_TLSLD:
4725 /* These special tls relocs tie a call to __tls_get_addr with
4726 its parameter symbol. */
4727 break;
4728
4729 case R_PPC64_GOT_TLSLD16:
4730 case R_PPC64_GOT_TLSLD16_LO:
4731 case R_PPC64_GOT_TLSLD16_HI:
4732 case R_PPC64_GOT_TLSLD16_HA:
4733 tls_type = TLS_TLS | TLS_LD;
4734 goto dogottls;
4735
4736 case R_PPC64_GOT_TLSGD16:
4737 case R_PPC64_GOT_TLSGD16_LO:
4738 case R_PPC64_GOT_TLSGD16_HI:
4739 case R_PPC64_GOT_TLSGD16_HA:
4740 tls_type = TLS_TLS | TLS_GD;
4741 goto dogottls;
4742
4743 case R_PPC64_GOT_TPREL16_DS:
4744 case R_PPC64_GOT_TPREL16_LO_DS:
4745 case R_PPC64_GOT_TPREL16_HI:
4746 case R_PPC64_GOT_TPREL16_HA:
4747 if (!info->executable)
4748 info->flags |= DF_STATIC_TLS;
4749 tls_type = TLS_TLS | TLS_TPREL;
4750 goto dogottls;
4751
4752 case R_PPC64_GOT_DTPREL16_DS:
4753 case R_PPC64_GOT_DTPREL16_LO_DS:
4754 case R_PPC64_GOT_DTPREL16_HI:
4755 case R_PPC64_GOT_DTPREL16_HA:
4756 tls_type = TLS_TLS | TLS_DTPREL;
4757 dogottls:
4758 sec->has_tls_reloc = 1;
4759 /* Fall thru */
4760
4761 case R_PPC64_GOT16:
4762 case R_PPC64_GOT16_DS:
4763 case R_PPC64_GOT16_HA:
4764 case R_PPC64_GOT16_HI:
4765 case R_PPC64_GOT16_LO:
4766 case R_PPC64_GOT16_LO_DS:
4767 /* This symbol requires a global offset table entry. */
4768 sec->has_toc_reloc = 1;
4769 if (ppc64_elf_tdata (abfd)->got == NULL
4770 && !create_got_section (abfd, info))
4771 return FALSE;
4772
4773 if (h != NULL)
4774 {
4775 struct ppc_link_hash_entry *eh;
4776 struct got_entry *ent;
4777
4778 eh = (struct ppc_link_hash_entry *) h;
4779 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4780 if (ent->addend == rel->r_addend
4781 && ent->owner == abfd
4782 && ent->tls_type == tls_type)
4783 break;
4784 if (ent == NULL)
4785 {
4786 bfd_size_type amt = sizeof (*ent);
4787 ent = bfd_alloc (abfd, amt);
4788 if (ent == NULL)
4789 return FALSE;
4790 ent->next = eh->elf.got.glist;
4791 ent->addend = rel->r_addend;
4792 ent->owner = abfd;
4793 ent->tls_type = tls_type;
4794 ent->got.refcount = 0;
4795 eh->elf.got.glist = ent;
4796 }
4797 ent->got.refcount += 1;
4798 eh->tls_mask |= tls_type;
4799 }
4800 else
4801 /* This is a global offset table entry for a local symbol. */
4802 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4803 rel->r_addend, tls_type))
4804 return FALSE;
4805 break;
4806
4807 case R_PPC64_PLT16_HA:
4808 case R_PPC64_PLT16_HI:
4809 case R_PPC64_PLT16_LO:
4810 case R_PPC64_PLT32:
4811 case R_PPC64_PLT64:
4812 /* This symbol requires a procedure linkage table entry. We
4813 actually build the entry in adjust_dynamic_symbol,
4814 because this might be a case of linking PIC code without
4815 linking in any dynamic objects, in which case we don't
4816 need to generate a procedure linkage table after all. */
4817 if (h == NULL)
4818 {
4819 /* It does not make sense to have a procedure linkage
4820 table entry for a local symbol. */
4821 bfd_set_error (bfd_error_bad_value);
4822 return FALSE;
4823 }
4824 else
4825 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4826 rel->r_addend))
4827 return FALSE;
4828 break;
4829
4830 /* The following relocations don't need to propagate the
4831 relocation if linking a shared object since they are
4832 section relative. */
4833 case R_PPC64_SECTOFF:
4834 case R_PPC64_SECTOFF_LO:
4835 case R_PPC64_SECTOFF_HI:
4836 case R_PPC64_SECTOFF_HA:
4837 case R_PPC64_SECTOFF_DS:
4838 case R_PPC64_SECTOFF_LO_DS:
4839 case R_PPC64_DTPREL16:
4840 case R_PPC64_DTPREL16_LO:
4841 case R_PPC64_DTPREL16_HI:
4842 case R_PPC64_DTPREL16_HA:
4843 case R_PPC64_DTPREL16_DS:
4844 case R_PPC64_DTPREL16_LO_DS:
4845 case R_PPC64_DTPREL16_HIGHER:
4846 case R_PPC64_DTPREL16_HIGHERA:
4847 case R_PPC64_DTPREL16_HIGHEST:
4848 case R_PPC64_DTPREL16_HIGHESTA:
4849 break;
4850
4851 /* Nor do these. */
4852 case R_PPC64_TOC16:
4853 case R_PPC64_TOC16_LO:
4854 case R_PPC64_TOC16_HI:
4855 case R_PPC64_TOC16_HA:
4856 case R_PPC64_TOC16_DS:
4857 case R_PPC64_TOC16_LO_DS:
4858 sec->has_toc_reloc = 1;
4859 break;
4860
4861 /* This relocation describes the C++ object vtable hierarchy.
4862 Reconstruct it for later use during GC. */
4863 case R_PPC64_GNU_VTINHERIT:
4864 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4865 return FALSE;
4866 break;
4867
4868 /* This relocation describes which C++ vtable entries are actually
4869 used. Record for later use during GC. */
4870 case R_PPC64_GNU_VTENTRY:
4871 BFD_ASSERT (h != NULL);
4872 if (h != NULL
4873 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4874 return FALSE;
4875 break;
4876
4877 case R_PPC64_REL14:
4878 case R_PPC64_REL14_BRTAKEN:
4879 case R_PPC64_REL14_BRNTAKEN:
4880 {
4881 asection *dest = NULL;
4882
4883 /* Heuristic: If jumping outside our section, chances are
4884 we are going to need a stub. */
4885 if (h != NULL)
4886 {
4887 /* If the sym is weak it may be overridden later, so
4888 don't assume we know where a weak sym lives. */
4889 if (h->root.type == bfd_link_hash_defined)
4890 dest = h->root.u.def.section;
4891 }
4892 else
4893 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4894 sec, r_symndx);
4895 if (dest != sec)
4896 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4897 }
4898 /* Fall through. */
4899
4900 case R_PPC64_REL24:
4901 if (h != NULL)
4902 {
4903 /* We may need a .plt entry if the function this reloc
4904 refers to is in a shared lib. */
4905 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4906 rel->r_addend))
4907 return FALSE;
4908 if (h == tga || h == dottga)
4909 sec->has_tls_reloc = 1;
4910 }
4911 break;
4912
4913 case R_PPC64_TPREL64:
4914 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4915 if (!info->executable)
4916 info->flags |= DF_STATIC_TLS;
4917 goto dotlstoc;
4918
4919 case R_PPC64_DTPMOD64:
4920 if (rel + 1 < rel_end
4921 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4922 && rel[1].r_offset == rel->r_offset + 8)
4923 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4924 else
4925 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4926 goto dotlstoc;
4927
4928 case R_PPC64_DTPREL64:
4929 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4930 if (rel != relocs
4931 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4932 && rel[-1].r_offset == rel->r_offset - 8)
4933 /* This is the second reloc of a dtpmod, dtprel pair.
4934 Don't mark with TLS_DTPREL. */
4935 goto dodyn;
4936
4937 dotlstoc:
4938 sec->has_tls_reloc = 1;
4939 if (h != NULL)
4940 {
4941 struct ppc_link_hash_entry *eh;
4942 eh = (struct ppc_link_hash_entry *) h;
4943 eh->tls_mask |= tls_type;
4944 }
4945 else
4946 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4947 rel->r_addend, tls_type))
4948 return FALSE;
4949
4950 ppc64_sec = ppc64_elf_section_data (sec);
4951 if (ppc64_sec->sec_type != sec_toc)
4952 {
4953 bfd_size_type amt;
4954
4955 /* One extra to simplify get_tls_mask. */
4956 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
4957 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
4958 if (ppc64_sec->u.toc.symndx == NULL)
4959 return FALSE;
4960 amt = sec->size * sizeof (bfd_vma) / 8;
4961 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
4962 if (ppc64_sec->u.toc.add == NULL)
4963 return FALSE;
4964 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4965 ppc64_sec->sec_type = sec_toc;
4966 }
4967 BFD_ASSERT (rel->r_offset % 8 == 0);
4968 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
4969 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
4970
4971 /* Mark the second slot of a GD or LD entry.
4972 -1 to indicate GD and -2 to indicate LD. */
4973 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4974 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
4975 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4976 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
4977 goto dodyn;
4978
4979 case R_PPC64_TPREL16:
4980 case R_PPC64_TPREL16_LO:
4981 case R_PPC64_TPREL16_HI:
4982 case R_PPC64_TPREL16_HA:
4983 case R_PPC64_TPREL16_DS:
4984 case R_PPC64_TPREL16_LO_DS:
4985 case R_PPC64_TPREL16_HIGHER:
4986 case R_PPC64_TPREL16_HIGHERA:
4987 case R_PPC64_TPREL16_HIGHEST:
4988 case R_PPC64_TPREL16_HIGHESTA:
4989 if (info->shared)
4990 {
4991 if (!info->executable)
4992 info->flags |= DF_STATIC_TLS;
4993 goto dodyn;
4994 }
4995 break;
4996
4997 case R_PPC64_ADDR64:
4998 if (opd_sym_map != NULL
4999 && rel + 1 < rel_end
5000 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5001 {
5002 if (h != NULL)
5003 {
5004 if (h->root.root.string[0] == '.'
5005 && h->root.root.string[1] != 0
5006 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
5007 ;
5008 else
5009 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5010 }
5011 else
5012 {
5013 asection *s;
5014
5015 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
5016 r_symndx);
5017 if (s == NULL)
5018 return FALSE;
5019 else if (s != sec)
5020 opd_sym_map[rel->r_offset / 8] = s;
5021 }
5022 }
5023 /* Fall through. */
5024
5025 case R_PPC64_REL30:
5026 case R_PPC64_REL32:
5027 case R_PPC64_REL64:
5028 case R_PPC64_ADDR14:
5029 case R_PPC64_ADDR14_BRNTAKEN:
5030 case R_PPC64_ADDR14_BRTAKEN:
5031 case R_PPC64_ADDR16:
5032 case R_PPC64_ADDR16_DS:
5033 case R_PPC64_ADDR16_HA:
5034 case R_PPC64_ADDR16_HI:
5035 case R_PPC64_ADDR16_HIGHER:
5036 case R_PPC64_ADDR16_HIGHERA:
5037 case R_PPC64_ADDR16_HIGHEST:
5038 case R_PPC64_ADDR16_HIGHESTA:
5039 case R_PPC64_ADDR16_LO:
5040 case R_PPC64_ADDR16_LO_DS:
5041 case R_PPC64_ADDR24:
5042 case R_PPC64_ADDR32:
5043 case R_PPC64_UADDR16:
5044 case R_PPC64_UADDR32:
5045 case R_PPC64_UADDR64:
5046 case R_PPC64_TOC:
5047 if (h != NULL && !info->shared)
5048 /* We may need a copy reloc. */
5049 h->non_got_ref = 1;
5050
5051 /* Don't propagate .opd relocs. */
5052 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5053 break;
5054
5055 /* If we are creating a shared library, and this is a reloc
5056 against a global symbol, or a non PC relative reloc
5057 against a local symbol, then we need to copy the reloc
5058 into the shared library. However, if we are linking with
5059 -Bsymbolic, we do not need to copy a reloc against a
5060 global symbol which is defined in an object we are
5061 including in the link (i.e., DEF_REGULAR is set). At
5062 this point we have not seen all the input files, so it is
5063 possible that DEF_REGULAR is not set now but will be set
5064 later (it is never cleared). In case of a weak definition,
5065 DEF_REGULAR may be cleared later by a strong definition in
5066 a shared library. We account for that possibility below by
5067 storing information in the dyn_relocs field of the hash
5068 table entry. A similar situation occurs when creating
5069 shared libraries and symbol visibility changes render the
5070 symbol local.
5071
5072 If on the other hand, we are creating an executable, we
5073 may need to keep relocations for symbols satisfied by a
5074 dynamic library if we manage to avoid copy relocs for the
5075 symbol. */
5076 dodyn:
5077 if ((info->shared
5078 && (must_be_dyn_reloc (info, r_type)
5079 || (h != NULL
5080 && (! info->symbolic
5081 || h->root.type == bfd_link_hash_defweak
5082 || !h->def_regular))))
5083 || (ELIMINATE_COPY_RELOCS
5084 && !info->shared
5085 && h != NULL
5086 && (h->root.type == bfd_link_hash_defweak
5087 || !h->def_regular)))
5088 {
5089 struct ppc_dyn_relocs *p;
5090 struct ppc_dyn_relocs **head;
5091
5092 /* We must copy these reloc types into the output file.
5093 Create a reloc section in dynobj and make room for
5094 this reloc. */
5095 if (sreloc == NULL)
5096 {
5097 sreloc = _bfd_elf_make_dynamic_reloc_section
5098 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5099
5100 if (sreloc == NULL)
5101 return FALSE;
5102 }
5103
5104 /* If this is a global symbol, we count the number of
5105 relocations we need for this symbol. */
5106 if (h != NULL)
5107 {
5108 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5109 }
5110 else
5111 {
5112 /* Track dynamic relocs needed for local syms too.
5113 We really need local syms available to do this
5114 easily. Oh well. */
5115
5116 asection *s;
5117 void *vpp;
5118
5119 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
5120 sec, r_symndx);
5121 if (s == NULL)
5122 return FALSE;
5123
5124 vpp = &elf_section_data (s)->local_dynrel;
5125 head = (struct ppc_dyn_relocs **) vpp;
5126 }
5127
5128 p = *head;
5129 if (p == NULL || p->sec != sec)
5130 {
5131 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5132 if (p == NULL)
5133 return FALSE;
5134 p->next = *head;
5135 *head = p;
5136 p->sec = sec;
5137 p->count = 0;
5138 p->pc_count = 0;
5139 }
5140
5141 p->count += 1;
5142 if (!must_be_dyn_reloc (info, r_type))
5143 p->pc_count += 1;
5144 }
5145 break;
5146
5147 default:
5148 break;
5149 }
5150 }
5151
5152 return TRUE;
5153 }
5154
5155 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5156 of the code entry point, and its section. */
5157
5158 static bfd_vma
5159 opd_entry_value (asection *opd_sec,
5160 bfd_vma offset,
5161 asection **code_sec,
5162 bfd_vma *code_off)
5163 {
5164 bfd *opd_bfd = opd_sec->owner;
5165 Elf_Internal_Rela *relocs;
5166 Elf_Internal_Rela *lo, *hi, *look;
5167 bfd_vma val;
5168
5169 /* No relocs implies we are linking a --just-symbols object. */
5170 if (opd_sec->reloc_count == 0)
5171 {
5172 bfd_vma val;
5173
5174 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5175 return (bfd_vma) -1;
5176
5177 if (code_sec != NULL)
5178 {
5179 asection *sec, *likely = NULL;
5180 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5181 if (sec->vma <= val
5182 && (sec->flags & SEC_LOAD) != 0
5183 && (sec->flags & SEC_ALLOC) != 0)
5184 likely = sec;
5185 if (likely != NULL)
5186 {
5187 *code_sec = likely;
5188 if (code_off != NULL)
5189 *code_off = val - likely->vma;
5190 }
5191 }
5192 return val;
5193 }
5194
5195 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5196
5197 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5198 if (relocs == NULL)
5199 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5200
5201 /* Go find the opd reloc at the sym address. */
5202 lo = relocs;
5203 BFD_ASSERT (lo != NULL);
5204 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5205 val = (bfd_vma) -1;
5206 while (lo < hi)
5207 {
5208 look = lo + (hi - lo) / 2;
5209 if (look->r_offset < offset)
5210 lo = look + 1;
5211 else if (look->r_offset > offset)
5212 hi = look;
5213 else
5214 {
5215 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5216
5217 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5218 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5219 {
5220 unsigned long symndx = ELF64_R_SYM (look->r_info);
5221 asection *sec;
5222
5223 if (symndx < symtab_hdr->sh_info)
5224 {
5225 Elf_Internal_Sym *sym;
5226
5227 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5228 if (sym == NULL)
5229 {
5230 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5231 symtab_hdr->sh_info,
5232 0, NULL, NULL, NULL);
5233 if (sym == NULL)
5234 break;
5235 symtab_hdr->contents = (bfd_byte *) sym;
5236 }
5237
5238 sym += symndx;
5239 val = sym->st_value;
5240 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5241 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5242 }
5243 else
5244 {
5245 struct elf_link_hash_entry **sym_hashes;
5246 struct elf_link_hash_entry *rh;
5247
5248 sym_hashes = elf_sym_hashes (opd_bfd);
5249 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5250 while (rh->root.type == bfd_link_hash_indirect
5251 || rh->root.type == bfd_link_hash_warning)
5252 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5253 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5254 || rh->root.type == bfd_link_hash_defweak);
5255 val = rh->root.u.def.value;
5256 sec = rh->root.u.def.section;
5257 }
5258 val += look->r_addend;
5259 if (code_off != NULL)
5260 *code_off = val;
5261 if (code_sec != NULL)
5262 *code_sec = sec;
5263 if (sec != NULL && sec->output_section != NULL)
5264 val += sec->output_section->vma + sec->output_offset;
5265 }
5266 break;
5267 }
5268 }
5269
5270 return val;
5271 }
5272
5273 /* Mark all our entry sym sections, both opd and code section. */
5274
5275 static void
5276 ppc64_elf_gc_keep (struct bfd_link_info *info)
5277 {
5278 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5279 struct bfd_sym_chain *sym;
5280
5281 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5282 {
5283 struct ppc_link_hash_entry *eh;
5284 asection *sec;
5285
5286 eh = (struct ppc_link_hash_entry *)
5287 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5288 if (eh == NULL)
5289 continue;
5290 if (eh->elf.root.type != bfd_link_hash_defined
5291 && eh->elf.root.type != bfd_link_hash_defweak)
5292 continue;
5293
5294 if (eh->is_func_descriptor
5295 && (eh->oh->elf.root.type == bfd_link_hash_defined
5296 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5297 {
5298 sec = eh->oh->elf.root.u.def.section;
5299 sec->flags |= SEC_KEEP;
5300 }
5301 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5302 && opd_entry_value (eh->elf.root.u.def.section,
5303 eh->elf.root.u.def.value,
5304 &sec, NULL) != (bfd_vma) -1)
5305 sec->flags |= SEC_KEEP;
5306
5307 sec = eh->elf.root.u.def.section;
5308 sec->flags |= SEC_KEEP;
5309 }
5310 }
5311
5312 /* Mark sections containing dynamically referenced symbols. When
5313 building shared libraries, we must assume that any visible symbol is
5314 referenced. */
5315
5316 static bfd_boolean
5317 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5318 {
5319 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5320 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5321
5322 if (eh->elf.root.type == bfd_link_hash_warning)
5323 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5324
5325 /* Dynamic linking info is on the func descriptor sym. */
5326 if (eh->oh != NULL
5327 && eh->oh->is_func_descriptor
5328 && (eh->oh->elf.root.type == bfd_link_hash_defined
5329 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5330 eh = eh->oh;
5331
5332 if ((eh->elf.root.type == bfd_link_hash_defined
5333 || eh->elf.root.type == bfd_link_hash_defweak)
5334 && (eh->elf.ref_dynamic
5335 || (!info->executable
5336 && eh->elf.def_regular
5337 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5338 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5339 {
5340 asection *code_sec;
5341
5342 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5343
5344 /* Function descriptor syms cause the associated
5345 function code sym section to be marked. */
5346 if (eh->is_func_descriptor
5347 && (eh->oh->elf.root.type == bfd_link_hash_defined
5348 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5349 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5350 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5351 && opd_entry_value (eh->elf.root.u.def.section,
5352 eh->elf.root.u.def.value,
5353 &code_sec, NULL) != (bfd_vma) -1)
5354 code_sec->flags |= SEC_KEEP;
5355 }
5356
5357 return TRUE;
5358 }
5359
5360 /* Return the section that should be marked against GC for a given
5361 relocation. */
5362
5363 static asection *
5364 ppc64_elf_gc_mark_hook (asection *sec,
5365 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5366 Elf_Internal_Rela *rel,
5367 struct elf_link_hash_entry *h,
5368 Elf_Internal_Sym *sym)
5369 {
5370 asection *rsec;
5371
5372 /* Syms return NULL if we're marking .opd, so we avoid marking all
5373 function sections, as all functions are referenced in .opd. */
5374 rsec = NULL;
5375 if (get_opd_info (sec) != NULL)
5376 return rsec;
5377
5378 if (h != NULL)
5379 {
5380 enum elf_ppc64_reloc_type r_type;
5381 struct ppc_link_hash_entry *eh;
5382
5383 r_type = ELF64_R_TYPE (rel->r_info);
5384 switch (r_type)
5385 {
5386 case R_PPC64_GNU_VTINHERIT:
5387 case R_PPC64_GNU_VTENTRY:
5388 break;
5389
5390 default:
5391 switch (h->root.type)
5392 {
5393 case bfd_link_hash_defined:
5394 case bfd_link_hash_defweak:
5395 eh = (struct ppc_link_hash_entry *) h;
5396 if (eh->oh != NULL
5397 && eh->oh->is_func_descriptor
5398 && (eh->oh->elf.root.type == bfd_link_hash_defined
5399 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5400 eh = eh->oh;
5401
5402 /* Function descriptor syms cause the associated
5403 function code sym section to be marked. */
5404 if (eh->is_func_descriptor
5405 && (eh->oh->elf.root.type == bfd_link_hash_defined
5406 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5407 {
5408 /* They also mark their opd section. */
5409 eh->elf.root.u.def.section->gc_mark = 1;
5410
5411 rsec = eh->oh->elf.root.u.def.section;
5412 }
5413 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5414 && opd_entry_value (eh->elf.root.u.def.section,
5415 eh->elf.root.u.def.value,
5416 &rsec, NULL) != (bfd_vma) -1)
5417 eh->elf.root.u.def.section->gc_mark = 1;
5418 else
5419 rsec = h->root.u.def.section;
5420 break;
5421
5422 case bfd_link_hash_common:
5423 rsec = h->root.u.c.p->section;
5424 break;
5425
5426 default:
5427 break;
5428 }
5429 }
5430 }
5431 else
5432 {
5433 struct _opd_sec_data *opd;
5434
5435 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5436 opd = get_opd_info (rsec);
5437 if (opd != NULL && opd->func_sec != NULL)
5438 {
5439 rsec->gc_mark = 1;
5440
5441 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5442 }
5443 }
5444
5445 return rsec;
5446 }
5447
5448 /* Update the .got, .plt. and dynamic reloc reference counts for the
5449 section being removed. */
5450
5451 static bfd_boolean
5452 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5453 asection *sec, const Elf_Internal_Rela *relocs)
5454 {
5455 struct ppc_link_hash_table *htab;
5456 Elf_Internal_Shdr *symtab_hdr;
5457 struct elf_link_hash_entry **sym_hashes;
5458 struct got_entry **local_got_ents;
5459 const Elf_Internal_Rela *rel, *relend;
5460
5461 if (info->relocatable)
5462 return TRUE;
5463
5464 if ((sec->flags & SEC_ALLOC) == 0)
5465 return TRUE;
5466
5467 elf_section_data (sec)->local_dynrel = NULL;
5468
5469 htab = ppc_hash_table (info);
5470 symtab_hdr = &elf_symtab_hdr (abfd);
5471 sym_hashes = elf_sym_hashes (abfd);
5472 local_got_ents = elf_local_got_ents (abfd);
5473
5474 relend = relocs + sec->reloc_count;
5475 for (rel = relocs; rel < relend; rel++)
5476 {
5477 unsigned long r_symndx;
5478 enum elf_ppc64_reloc_type r_type;
5479 struct elf_link_hash_entry *h = NULL;
5480 char tls_type = 0;
5481
5482 r_symndx = ELF64_R_SYM (rel->r_info);
5483 r_type = ELF64_R_TYPE (rel->r_info);
5484 if (r_symndx >= symtab_hdr->sh_info)
5485 {
5486 struct ppc_link_hash_entry *eh;
5487 struct ppc_dyn_relocs **pp;
5488 struct ppc_dyn_relocs *p;
5489
5490 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5491 while (h->root.type == bfd_link_hash_indirect
5492 || h->root.type == bfd_link_hash_warning)
5493 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5494 eh = (struct ppc_link_hash_entry *) h;
5495
5496 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5497 if (p->sec == sec)
5498 {
5499 /* Everything must go for SEC. */
5500 *pp = p->next;
5501 break;
5502 }
5503 }
5504
5505 switch (r_type)
5506 {
5507 case R_PPC64_GOT_TLSLD16:
5508 case R_PPC64_GOT_TLSLD16_LO:
5509 case R_PPC64_GOT_TLSLD16_HI:
5510 case R_PPC64_GOT_TLSLD16_HA:
5511 tls_type = TLS_TLS | TLS_LD;
5512 goto dogot;
5513
5514 case R_PPC64_GOT_TLSGD16:
5515 case R_PPC64_GOT_TLSGD16_LO:
5516 case R_PPC64_GOT_TLSGD16_HI:
5517 case R_PPC64_GOT_TLSGD16_HA:
5518 tls_type = TLS_TLS | TLS_GD;
5519 goto dogot;
5520
5521 case R_PPC64_GOT_TPREL16_DS:
5522 case R_PPC64_GOT_TPREL16_LO_DS:
5523 case R_PPC64_GOT_TPREL16_HI:
5524 case R_PPC64_GOT_TPREL16_HA:
5525 tls_type = TLS_TLS | TLS_TPREL;
5526 goto dogot;
5527
5528 case R_PPC64_GOT_DTPREL16_DS:
5529 case R_PPC64_GOT_DTPREL16_LO_DS:
5530 case R_PPC64_GOT_DTPREL16_HI:
5531 case R_PPC64_GOT_DTPREL16_HA:
5532 tls_type = TLS_TLS | TLS_DTPREL;
5533 goto dogot;
5534
5535 case R_PPC64_GOT16:
5536 case R_PPC64_GOT16_DS:
5537 case R_PPC64_GOT16_HA:
5538 case R_PPC64_GOT16_HI:
5539 case R_PPC64_GOT16_LO:
5540 case R_PPC64_GOT16_LO_DS:
5541 dogot:
5542 {
5543 struct got_entry *ent;
5544
5545 if (h != NULL)
5546 ent = h->got.glist;
5547 else
5548 ent = local_got_ents[r_symndx];
5549
5550 for (; ent != NULL; ent = ent->next)
5551 if (ent->addend == rel->r_addend
5552 && ent->owner == abfd
5553 && ent->tls_type == tls_type)
5554 break;
5555 if (ent == NULL)
5556 abort ();
5557 if (ent->got.refcount > 0)
5558 ent->got.refcount -= 1;
5559 }
5560 break;
5561
5562 case R_PPC64_PLT16_HA:
5563 case R_PPC64_PLT16_HI:
5564 case R_PPC64_PLT16_LO:
5565 case R_PPC64_PLT32:
5566 case R_PPC64_PLT64:
5567 case R_PPC64_REL14:
5568 case R_PPC64_REL14_BRNTAKEN:
5569 case R_PPC64_REL14_BRTAKEN:
5570 case R_PPC64_REL24:
5571 if (h != NULL)
5572 {
5573 struct plt_entry *ent;
5574
5575 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5576 if (ent->addend == rel->r_addend)
5577 break;
5578 if (ent == NULL)
5579 abort ();
5580 if (ent->plt.refcount > 0)
5581 ent->plt.refcount -= 1;
5582 }
5583 break;
5584
5585 default:
5586 break;
5587 }
5588 }
5589 return TRUE;
5590 }
5591
5592 /* The maximum size of .sfpr. */
5593 #define SFPR_MAX (218*4)
5594
5595 struct sfpr_def_parms
5596 {
5597 const char name[12];
5598 unsigned char lo, hi;
5599 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5600 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5601 };
5602
5603 /* Auto-generate _save*, _rest* functions in .sfpr. */
5604
5605 static unsigned int
5606 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5607 {
5608 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5609 unsigned int i;
5610 size_t len = strlen (parm->name);
5611 bfd_boolean writing = FALSE;
5612 char sym[16];
5613
5614 memcpy (sym, parm->name, len);
5615 sym[len + 2] = 0;
5616
5617 for (i = parm->lo; i <= parm->hi; i++)
5618 {
5619 struct elf_link_hash_entry *h;
5620
5621 sym[len + 0] = i / 10 + '0';
5622 sym[len + 1] = i % 10 + '0';
5623 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5624 if (h != NULL
5625 && !h->def_regular)
5626 {
5627 h->root.type = bfd_link_hash_defined;
5628 h->root.u.def.section = htab->sfpr;
5629 h->root.u.def.value = htab->sfpr->size;
5630 h->type = STT_FUNC;
5631 h->def_regular = 1;
5632 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5633 writing = TRUE;
5634 if (htab->sfpr->contents == NULL)
5635 {
5636 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5637 if (htab->sfpr->contents == NULL)
5638 return FALSE;
5639 }
5640 }
5641 if (writing)
5642 {
5643 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5644 if (i != parm->hi)
5645 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5646 else
5647 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5648 htab->sfpr->size = p - htab->sfpr->contents;
5649 }
5650 }
5651
5652 return TRUE;
5653 }
5654
5655 static bfd_byte *
5656 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5657 {
5658 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5659 return p + 4;
5660 }
5661
5662 static bfd_byte *
5663 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5664 {
5665 p = savegpr0 (abfd, p, r);
5666 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5667 p = p + 4;
5668 bfd_put_32 (abfd, BLR, p);
5669 return p + 4;
5670 }
5671
5672 static bfd_byte *
5673 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5674 {
5675 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5676 return p + 4;
5677 }
5678
5679 static bfd_byte *
5680 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5681 {
5682 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5683 p = p + 4;
5684 p = restgpr0 (abfd, p, r);
5685 bfd_put_32 (abfd, MTLR_R0, p);
5686 p = p + 4;
5687 if (r == 29)
5688 {
5689 p = restgpr0 (abfd, p, 30);
5690 p = restgpr0 (abfd, p, 31);
5691 }
5692 bfd_put_32 (abfd, BLR, p);
5693 return p + 4;
5694 }
5695
5696 static bfd_byte *
5697 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5698 {
5699 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5700 return p + 4;
5701 }
5702
5703 static bfd_byte *
5704 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5705 {
5706 p = savegpr1 (abfd, p, r);
5707 bfd_put_32 (abfd, BLR, p);
5708 return p + 4;
5709 }
5710
5711 static bfd_byte *
5712 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5713 {
5714 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5715 return p + 4;
5716 }
5717
5718 static bfd_byte *
5719 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5720 {
5721 p = restgpr1 (abfd, p, r);
5722 bfd_put_32 (abfd, BLR, p);
5723 return p + 4;
5724 }
5725
5726 static bfd_byte *
5727 savefpr (bfd *abfd, bfd_byte *p, int r)
5728 {
5729 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5730 return p + 4;
5731 }
5732
5733 static bfd_byte *
5734 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5735 {
5736 p = savefpr (abfd, p, r);
5737 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5738 p = p + 4;
5739 bfd_put_32 (abfd, BLR, p);
5740 return p + 4;
5741 }
5742
5743 static bfd_byte *
5744 restfpr (bfd *abfd, bfd_byte *p, int r)
5745 {
5746 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5747 return p + 4;
5748 }
5749
5750 static bfd_byte *
5751 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5752 {
5753 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5754 p = p + 4;
5755 p = restfpr (abfd, p, r);
5756 bfd_put_32 (abfd, MTLR_R0, p);
5757 p = p + 4;
5758 if (r == 29)
5759 {
5760 p = restfpr (abfd, p, 30);
5761 p = restfpr (abfd, p, 31);
5762 }
5763 bfd_put_32 (abfd, BLR, p);
5764 return p + 4;
5765 }
5766
5767 static bfd_byte *
5768 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5769 {
5770 p = savefpr (abfd, p, r);
5771 bfd_put_32 (abfd, BLR, p);
5772 return p + 4;
5773 }
5774
5775 static bfd_byte *
5776 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5777 {
5778 p = restfpr (abfd, p, r);
5779 bfd_put_32 (abfd, BLR, p);
5780 return p + 4;
5781 }
5782
5783 static bfd_byte *
5784 savevr (bfd *abfd, bfd_byte *p, int r)
5785 {
5786 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5787 p = p + 4;
5788 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5789 return p + 4;
5790 }
5791
5792 static bfd_byte *
5793 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5794 {
5795 p = savevr (abfd, p, r);
5796 bfd_put_32 (abfd, BLR, p);
5797 return p + 4;
5798 }
5799
5800 static bfd_byte *
5801 restvr (bfd *abfd, bfd_byte *p, int r)
5802 {
5803 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5804 p = p + 4;
5805 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5806 return p + 4;
5807 }
5808
5809 static bfd_byte *
5810 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5811 {
5812 p = restvr (abfd, p, r);
5813 bfd_put_32 (abfd, BLR, p);
5814 return p + 4;
5815 }
5816
5817 /* Called via elf_link_hash_traverse to transfer dynamic linking
5818 information on function code symbol entries to their corresponding
5819 function descriptor symbol entries. */
5820
5821 static bfd_boolean
5822 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5823 {
5824 struct bfd_link_info *info;
5825 struct ppc_link_hash_table *htab;
5826 struct plt_entry *ent;
5827 struct ppc_link_hash_entry *fh;
5828 struct ppc_link_hash_entry *fdh;
5829 bfd_boolean force_local;
5830
5831 fh = (struct ppc_link_hash_entry *) h;
5832 if (fh->elf.root.type == bfd_link_hash_indirect)
5833 return TRUE;
5834
5835 if (fh->elf.root.type == bfd_link_hash_warning)
5836 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5837
5838 info = inf;
5839 htab = ppc_hash_table (info);
5840
5841 /* Resolve undefined references to dot-symbols as the value
5842 in the function descriptor, if we have one in a regular object.
5843 This is to satisfy cases like ".quad .foo". Calls to functions
5844 in dynamic objects are handled elsewhere. */
5845 if (fh->elf.root.type == bfd_link_hash_undefweak
5846 && fh->was_undefined
5847 && (fh->oh->elf.root.type == bfd_link_hash_defined
5848 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5849 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5850 && opd_entry_value (fh->oh->elf.root.u.def.section,
5851 fh->oh->elf.root.u.def.value,
5852 &fh->elf.root.u.def.section,
5853 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5854 {
5855 fh->elf.root.type = fh->oh->elf.root.type;
5856 fh->elf.forced_local = 1;
5857 fh->elf.def_regular = fh->oh->elf.def_regular;
5858 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5859 }
5860
5861 /* If this is a function code symbol, transfer dynamic linking
5862 information to the function descriptor symbol. */
5863 if (!fh->is_func)
5864 return TRUE;
5865
5866 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5867 if (ent->plt.refcount > 0)
5868 break;
5869 if (ent == NULL
5870 || fh->elf.root.root.string[0] != '.'
5871 || fh->elf.root.root.string[1] == '\0')
5872 return TRUE;
5873
5874 /* Find the corresponding function descriptor symbol. Create it
5875 as undefined if necessary. */
5876
5877 fdh = get_fdh (fh, htab);
5878 if (fdh != NULL)
5879 while (fdh->elf.root.type == bfd_link_hash_indirect
5880 || fdh->elf.root.type == bfd_link_hash_warning)
5881 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5882
5883 if (fdh == NULL
5884 && !info->executable
5885 && (fh->elf.root.type == bfd_link_hash_undefined
5886 || fh->elf.root.type == bfd_link_hash_undefweak))
5887 {
5888 fdh = make_fdh (info, fh);
5889 if (fdh == NULL)
5890 return FALSE;
5891 }
5892
5893 /* Fake function descriptors are made undefweak. If the function
5894 code symbol is strong undefined, make the fake sym the same.
5895 If the function code symbol is defined, then force the fake
5896 descriptor local; We can't support overriding of symbols in a
5897 shared library on a fake descriptor. */
5898
5899 if (fdh != NULL
5900 && fdh->fake
5901 && fdh->elf.root.type == bfd_link_hash_undefweak)
5902 {
5903 if (fh->elf.root.type == bfd_link_hash_undefined)
5904 {
5905 fdh->elf.root.type = bfd_link_hash_undefined;
5906 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5907 }
5908 else if (fh->elf.root.type == bfd_link_hash_defined
5909 || fh->elf.root.type == bfd_link_hash_defweak)
5910 {
5911 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5912 }
5913 }
5914
5915 if (fdh != NULL
5916 && !fdh->elf.forced_local
5917 && (!info->executable
5918 || fdh->elf.def_dynamic
5919 || fdh->elf.ref_dynamic
5920 || (fdh->elf.root.type == bfd_link_hash_undefweak
5921 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5922 {
5923 if (fdh->elf.dynindx == -1)
5924 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5925 return FALSE;
5926 fdh->elf.ref_regular |= fh->elf.ref_regular;
5927 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5928 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5929 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5930 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5931 {
5932 move_plt_plist (fh, fdh);
5933 fdh->elf.needs_plt = 1;
5934 }
5935 fdh->is_func_descriptor = 1;
5936 fdh->oh = fh;
5937 fh->oh = fdh;
5938 }
5939
5940 /* Now that the info is on the function descriptor, clear the
5941 function code sym info. Any function code syms for which we
5942 don't have a definition in a regular file, we force local.
5943 This prevents a shared library from exporting syms that have
5944 been imported from another library. Function code syms that
5945 are really in the library we must leave global to prevent the
5946 linker dragging in a definition from a static library. */
5947 force_local = (!fh->elf.def_regular
5948 || fdh == NULL
5949 || !fdh->elf.def_regular
5950 || fdh->elf.forced_local);
5951 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5952
5953 return TRUE;
5954 }
5955
5956 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5957 this hook to a) provide some gcc support functions, and b) transfer
5958 dynamic linking information gathered so far on function code symbol
5959 entries, to their corresponding function descriptor symbol entries. */
5960
5961 static bfd_boolean
5962 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5963 struct bfd_link_info *info)
5964 {
5965 struct ppc_link_hash_table *htab;
5966 unsigned int i;
5967 const struct sfpr_def_parms funcs[] =
5968 {
5969 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5970 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5971 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5972 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5973 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5974 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5975 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5976 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5977 { "._savef", 14, 31, savefpr, savefpr1_tail },
5978 { "._restf", 14, 31, restfpr, restfpr1_tail },
5979 { "_savevr_", 20, 31, savevr, savevr_tail },
5980 { "_restvr_", 20, 31, restvr, restvr_tail }
5981 };
5982
5983 htab = ppc_hash_table (info);
5984 if (htab->sfpr == NULL)
5985 /* We don't have any relocs. */
5986 return TRUE;
5987
5988 /* Provide any missing _save* and _rest* functions. */
5989 htab->sfpr->size = 0;
5990 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5991 if (!sfpr_define (info, &funcs[i]))
5992 return FALSE;
5993
5994 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5995
5996 if (htab->sfpr->size == 0)
5997 htab->sfpr->flags |= SEC_EXCLUDE;
5998
5999 return TRUE;
6000 }
6001
6002 /* Adjust a symbol defined by a dynamic object and referenced by a
6003 regular object. The current definition is in some section of the
6004 dynamic object, but we're not including those sections. We have to
6005 change the definition to something the rest of the link can
6006 understand. */
6007
6008 static bfd_boolean
6009 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6010 struct elf_link_hash_entry *h)
6011 {
6012 struct ppc_link_hash_table *htab;
6013 asection *s;
6014
6015 htab = ppc_hash_table (info);
6016
6017 /* Deal with function syms. */
6018 if (h->type == STT_FUNC
6019 || h->needs_plt)
6020 {
6021 /* Clear procedure linkage table information for any symbol that
6022 won't need a .plt entry. */
6023 struct plt_entry *ent;
6024 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6025 if (ent->plt.refcount > 0)
6026 break;
6027 if (ent == NULL
6028 || SYMBOL_CALLS_LOCAL (info, h)
6029 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6030 && h->root.type == bfd_link_hash_undefweak))
6031 {
6032 h->plt.plist = NULL;
6033 h->needs_plt = 0;
6034 }
6035 }
6036 else
6037 h->plt.plist = NULL;
6038
6039 /* If this is a weak symbol, and there is a real definition, the
6040 processor independent code will have arranged for us to see the
6041 real definition first, and we can just use the same value. */
6042 if (h->u.weakdef != NULL)
6043 {
6044 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6045 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6046 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6047 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6048 if (ELIMINATE_COPY_RELOCS)
6049 h->non_got_ref = h->u.weakdef->non_got_ref;
6050 return TRUE;
6051 }
6052
6053 /* If we are creating a shared library, we must presume that the
6054 only references to the symbol are via the global offset table.
6055 For such cases we need not do anything here; the relocations will
6056 be handled correctly by relocate_section. */
6057 if (info->shared)
6058 return TRUE;
6059
6060 /* If there are no references to this symbol that do not use the
6061 GOT, we don't need to generate a copy reloc. */
6062 if (!h->non_got_ref)
6063 return TRUE;
6064
6065 /* Don't generate a copy reloc for symbols defined in the executable. */
6066 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6067 return TRUE;
6068
6069 if (ELIMINATE_COPY_RELOCS)
6070 {
6071 struct ppc_link_hash_entry * eh;
6072 struct ppc_dyn_relocs *p;
6073
6074 eh = (struct ppc_link_hash_entry *) h;
6075 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6076 {
6077 s = p->sec->output_section;
6078 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6079 break;
6080 }
6081
6082 /* If we didn't find any dynamic relocs in read-only sections, then
6083 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6084 if (p == NULL)
6085 {
6086 h->non_got_ref = 0;
6087 return TRUE;
6088 }
6089 }
6090
6091 if (h->plt.plist != NULL)
6092 {
6093 /* We should never get here, but unfortunately there are versions
6094 of gcc out there that improperly (for this ABI) put initialized
6095 function pointers, vtable refs and suchlike in read-only
6096 sections. Allow them to proceed, but warn that this might
6097 break at runtime. */
6098 (*_bfd_error_handler)
6099 (_("copy reloc against `%s' requires lazy plt linking; "
6100 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6101 h->root.root.string);
6102 }
6103
6104 /* This is a reference to a symbol defined by a dynamic object which
6105 is not a function. */
6106
6107 if (h->size == 0)
6108 {
6109 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6110 h->root.root.string);
6111 return TRUE;
6112 }
6113
6114 /* We must allocate the symbol in our .dynbss section, which will
6115 become part of the .bss section of the executable. There will be
6116 an entry for this symbol in the .dynsym section. The dynamic
6117 object will contain position independent code, so all references
6118 from the dynamic object to this symbol will go through the global
6119 offset table. The dynamic linker will use the .dynsym entry to
6120 determine the address it must put in the global offset table, so
6121 both the dynamic object and the regular object will refer to the
6122 same memory location for the variable. */
6123
6124 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6125 to copy the initial value out of the dynamic object and into the
6126 runtime process image. We need to remember the offset into the
6127 .rela.bss section we are going to use. */
6128 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6129 {
6130 htab->relbss->size += sizeof (Elf64_External_Rela);
6131 h->needs_copy = 1;
6132 }
6133
6134 s = htab->dynbss;
6135
6136 return _bfd_elf_adjust_dynamic_copy (h, s);
6137 }
6138
6139 /* If given a function descriptor symbol, hide both the function code
6140 sym and the descriptor. */
6141 static void
6142 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6143 struct elf_link_hash_entry *h,
6144 bfd_boolean force_local)
6145 {
6146 struct ppc_link_hash_entry *eh;
6147 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6148
6149 eh = (struct ppc_link_hash_entry *) h;
6150 if (eh->is_func_descriptor)
6151 {
6152 struct ppc_link_hash_entry *fh = eh->oh;
6153
6154 if (fh == NULL)
6155 {
6156 const char *p, *q;
6157 struct ppc_link_hash_table *htab;
6158 char save;
6159
6160 /* We aren't supposed to use alloca in BFD because on
6161 systems which do not have alloca the version in libiberty
6162 calls xmalloc, which might cause the program to crash
6163 when it runs out of memory. This function doesn't have a
6164 return status, so there's no way to gracefully return an
6165 error. So cheat. We know that string[-1] can be safely
6166 accessed; It's either a string in an ELF string table,
6167 or allocated in an objalloc structure. */
6168
6169 p = eh->elf.root.root.string - 1;
6170 save = *p;
6171 *(char *) p = '.';
6172 htab = ppc_hash_table (info);
6173 fh = (struct ppc_link_hash_entry *)
6174 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6175 *(char *) p = save;
6176
6177 /* Unfortunately, if it so happens that the string we were
6178 looking for was allocated immediately before this string,
6179 then we overwrote the string terminator. That's the only
6180 reason the lookup should fail. */
6181 if (fh == NULL)
6182 {
6183 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6184 while (q >= eh->elf.root.root.string && *q == *p)
6185 --q, --p;
6186 if (q < eh->elf.root.root.string && *p == '.')
6187 fh = (struct ppc_link_hash_entry *)
6188 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6189 }
6190 if (fh != NULL)
6191 {
6192 eh->oh = fh;
6193 fh->oh = eh;
6194 }
6195 }
6196 if (fh != NULL)
6197 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6198 }
6199 }
6200
6201 static bfd_boolean
6202 get_sym_h (struct elf_link_hash_entry **hp,
6203 Elf_Internal_Sym **symp,
6204 asection **symsecp,
6205 char **tls_maskp,
6206 Elf_Internal_Sym **locsymsp,
6207 unsigned long r_symndx,
6208 bfd *ibfd)
6209 {
6210 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6211
6212 if (r_symndx >= symtab_hdr->sh_info)
6213 {
6214 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6215 struct elf_link_hash_entry *h;
6216
6217 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6218 while (h->root.type == bfd_link_hash_indirect
6219 || h->root.type == bfd_link_hash_warning)
6220 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6221
6222 if (hp != NULL)
6223 *hp = h;
6224
6225 if (symp != NULL)
6226 *symp = NULL;
6227
6228 if (symsecp != NULL)
6229 {
6230 asection *symsec = NULL;
6231 if (h->root.type == bfd_link_hash_defined
6232 || h->root.type == bfd_link_hash_defweak)
6233 symsec = h->root.u.def.section;
6234 *symsecp = symsec;
6235 }
6236
6237 if (tls_maskp != NULL)
6238 {
6239 struct ppc_link_hash_entry *eh;
6240
6241 eh = (struct ppc_link_hash_entry *) h;
6242 *tls_maskp = &eh->tls_mask;
6243 }
6244 }
6245 else
6246 {
6247 Elf_Internal_Sym *sym;
6248 Elf_Internal_Sym *locsyms = *locsymsp;
6249
6250 if (locsyms == NULL)
6251 {
6252 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6253 if (locsyms == NULL)
6254 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6255 symtab_hdr->sh_info,
6256 0, NULL, NULL, NULL);
6257 if (locsyms == NULL)
6258 return FALSE;
6259 *locsymsp = locsyms;
6260 }
6261 sym = locsyms + r_symndx;
6262
6263 if (hp != NULL)
6264 *hp = NULL;
6265
6266 if (symp != NULL)
6267 *symp = sym;
6268
6269 if (symsecp != NULL)
6270 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6271
6272 if (tls_maskp != NULL)
6273 {
6274 struct got_entry **lgot_ents;
6275 char *tls_mask;
6276
6277 tls_mask = NULL;
6278 lgot_ents = elf_local_got_ents (ibfd);
6279 if (lgot_ents != NULL)
6280 {
6281 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6282 tls_mask = &lgot_masks[r_symndx];
6283 }
6284 *tls_maskp = tls_mask;
6285 }
6286 }
6287 return TRUE;
6288 }
6289
6290 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6291 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6292 type suitable for optimization, and 1 otherwise. */
6293
6294 static int
6295 get_tls_mask (char **tls_maskp,
6296 unsigned long *toc_symndx,
6297 bfd_vma *toc_addend,
6298 Elf_Internal_Sym **locsymsp,
6299 const Elf_Internal_Rela *rel,
6300 bfd *ibfd)
6301 {
6302 unsigned long r_symndx;
6303 int next_r;
6304 struct elf_link_hash_entry *h;
6305 Elf_Internal_Sym *sym;
6306 asection *sec;
6307 bfd_vma off;
6308
6309 r_symndx = ELF64_R_SYM (rel->r_info);
6310 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6311 return 0;
6312
6313 if ((*tls_maskp != NULL && **tls_maskp != 0)
6314 || sec == NULL
6315 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6316 return 1;
6317
6318 /* Look inside a TOC section too. */
6319 if (h != NULL)
6320 {
6321 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6322 off = h->root.u.def.value;
6323 }
6324 else
6325 off = sym->st_value;
6326 off += rel->r_addend;
6327 BFD_ASSERT (off % 8 == 0);
6328 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6329 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6330 if (toc_symndx != NULL)
6331 *toc_symndx = r_symndx;
6332 if (toc_addend != NULL)
6333 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6334 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6335 return 0;
6336 if ((h == NULL
6337 || ((h->root.type == bfd_link_hash_defined
6338 || h->root.type == bfd_link_hash_defweak)
6339 && !h->def_dynamic))
6340 && (next_r == -1 || next_r == -2))
6341 return 1 - next_r;
6342 return 1;
6343 }
6344
6345 /* Adjust all global syms defined in opd sections. In gcc generated
6346 code for the old ABI, these will already have been done. */
6347
6348 static bfd_boolean
6349 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6350 {
6351 struct ppc_link_hash_entry *eh;
6352 asection *sym_sec;
6353 struct _opd_sec_data *opd;
6354
6355 if (h->root.type == bfd_link_hash_indirect)
6356 return TRUE;
6357
6358 if (h->root.type == bfd_link_hash_warning)
6359 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6360
6361 if (h->root.type != bfd_link_hash_defined
6362 && h->root.type != bfd_link_hash_defweak)
6363 return TRUE;
6364
6365 eh = (struct ppc_link_hash_entry *) h;
6366 if (eh->adjust_done)
6367 return TRUE;
6368
6369 sym_sec = eh->elf.root.u.def.section;
6370 opd = get_opd_info (sym_sec);
6371 if (opd != NULL && opd->adjust != NULL)
6372 {
6373 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6374 if (adjust == -1)
6375 {
6376 /* This entry has been deleted. */
6377 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6378 if (dsec == NULL)
6379 {
6380 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6381 if (elf_discarded_section (dsec))
6382 {
6383 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6384 break;
6385 }
6386 }
6387 eh->elf.root.u.def.value = 0;
6388 eh->elf.root.u.def.section = dsec;
6389 }
6390 else
6391 eh->elf.root.u.def.value += adjust;
6392 eh->adjust_done = 1;
6393 }
6394 return TRUE;
6395 }
6396
6397 /* Handles decrementing dynamic reloc counts for the reloc specified by
6398 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6399 have already been determined. */
6400
6401 static bfd_boolean
6402 dec_dynrel_count (bfd_vma r_info,
6403 asection *sec,
6404 struct bfd_link_info *info,
6405 Elf_Internal_Sym **local_syms,
6406 struct elf_link_hash_entry *h,
6407 asection *sym_sec)
6408 {
6409 enum elf_ppc64_reloc_type r_type;
6410 struct ppc_dyn_relocs *p;
6411 struct ppc_dyn_relocs **pp;
6412
6413 /* Can this reloc be dynamic? This switch, and later tests here
6414 should be kept in sync with the code in check_relocs. */
6415 r_type = ELF64_R_TYPE (r_info);
6416 switch (r_type)
6417 {
6418 default:
6419 return TRUE;
6420
6421 case R_PPC64_TPREL16:
6422 case R_PPC64_TPREL16_LO:
6423 case R_PPC64_TPREL16_HI:
6424 case R_PPC64_TPREL16_HA:
6425 case R_PPC64_TPREL16_DS:
6426 case R_PPC64_TPREL16_LO_DS:
6427 case R_PPC64_TPREL16_HIGHER:
6428 case R_PPC64_TPREL16_HIGHERA:
6429 case R_PPC64_TPREL16_HIGHEST:
6430 case R_PPC64_TPREL16_HIGHESTA:
6431 if (!info->shared)
6432 return TRUE;
6433
6434 case R_PPC64_TPREL64:
6435 case R_PPC64_DTPMOD64:
6436 case R_PPC64_DTPREL64:
6437 case R_PPC64_ADDR64:
6438 case R_PPC64_REL30:
6439 case R_PPC64_REL32:
6440 case R_PPC64_REL64:
6441 case R_PPC64_ADDR14:
6442 case R_PPC64_ADDR14_BRNTAKEN:
6443 case R_PPC64_ADDR14_BRTAKEN:
6444 case R_PPC64_ADDR16:
6445 case R_PPC64_ADDR16_DS:
6446 case R_PPC64_ADDR16_HA:
6447 case R_PPC64_ADDR16_HI:
6448 case R_PPC64_ADDR16_HIGHER:
6449 case R_PPC64_ADDR16_HIGHERA:
6450 case R_PPC64_ADDR16_HIGHEST:
6451 case R_PPC64_ADDR16_HIGHESTA:
6452 case R_PPC64_ADDR16_LO:
6453 case R_PPC64_ADDR16_LO_DS:
6454 case R_PPC64_ADDR24:
6455 case R_PPC64_ADDR32:
6456 case R_PPC64_UADDR16:
6457 case R_PPC64_UADDR32:
6458 case R_PPC64_UADDR64:
6459 case R_PPC64_TOC:
6460 break;
6461 }
6462
6463 if (local_syms != NULL)
6464 {
6465 unsigned long r_symndx;
6466 Elf_Internal_Sym *sym;
6467 bfd *ibfd = sec->owner;
6468
6469 r_symndx = ELF64_R_SYM (r_info);
6470 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6471 return FALSE;
6472 }
6473
6474 if ((info->shared
6475 && (must_be_dyn_reloc (info, r_type)
6476 || (h != NULL
6477 && (!info->symbolic
6478 || h->root.type == bfd_link_hash_defweak
6479 || !h->def_regular))))
6480 || (ELIMINATE_COPY_RELOCS
6481 && !info->shared
6482 && h != NULL
6483 && (h->root.type == bfd_link_hash_defweak
6484 || !h->def_regular)))
6485 ;
6486 else
6487 return TRUE;
6488
6489 if (h != NULL)
6490 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6491 else
6492 {
6493 if (sym_sec != NULL)
6494 {
6495 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6496 pp = (struct ppc_dyn_relocs **) vpp;
6497 }
6498 else
6499 {
6500 void *vpp = &elf_section_data (sec)->local_dynrel;
6501 pp = (struct ppc_dyn_relocs **) vpp;
6502 }
6503
6504 /* elf_gc_sweep may have already removed all dyn relocs associated
6505 with local syms for a given section. Don't report a dynreloc
6506 miscount. */
6507 if (*pp == NULL)
6508 return TRUE;
6509 }
6510
6511 while ((p = *pp) != NULL)
6512 {
6513 if (p->sec == sec)
6514 {
6515 if (!must_be_dyn_reloc (info, r_type))
6516 p->pc_count -= 1;
6517 p->count -= 1;
6518 if (p->count == 0)
6519 *pp = p->next;
6520 return TRUE;
6521 }
6522 pp = &p->next;
6523 }
6524
6525 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6526 sec->owner, sec);
6527 bfd_set_error (bfd_error_bad_value);
6528 return FALSE;
6529 }
6530
6531 /* Remove unused Official Procedure Descriptor entries. Currently we
6532 only remove those associated with functions in discarded link-once
6533 sections, or weakly defined functions that have been overridden. It
6534 would be possible to remove many more entries for statically linked
6535 applications. */
6536
6537 bfd_boolean
6538 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6539 bfd_boolean non_overlapping)
6540 {
6541 bfd *ibfd;
6542 bfd_boolean some_edited = FALSE;
6543 asection *need_pad = NULL;
6544
6545 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6546 {
6547 asection *sec;
6548 Elf_Internal_Rela *relstart, *rel, *relend;
6549 Elf_Internal_Shdr *symtab_hdr;
6550 Elf_Internal_Sym *local_syms;
6551 struct elf_link_hash_entry **sym_hashes;
6552 bfd_vma offset;
6553 struct _opd_sec_data *opd;
6554 bfd_boolean need_edit, add_aux_fields;
6555 bfd_size_type cnt_16b = 0;
6556
6557 sec = bfd_get_section_by_name (ibfd, ".opd");
6558 if (sec == NULL || sec->size == 0)
6559 continue;
6560
6561 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6562 continue;
6563
6564 if (sec->output_section == bfd_abs_section_ptr)
6565 continue;
6566
6567 /* Look through the section relocs. */
6568 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6569 continue;
6570
6571 local_syms = NULL;
6572 symtab_hdr = &elf_symtab_hdr (ibfd);
6573 sym_hashes = elf_sym_hashes (ibfd);
6574
6575 /* Read the relocations. */
6576 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6577 info->keep_memory);
6578 if (relstart == NULL)
6579 return FALSE;
6580
6581 /* First run through the relocs to check they are sane, and to
6582 determine whether we need to edit this opd section. */
6583 need_edit = FALSE;
6584 need_pad = sec;
6585 offset = 0;
6586 relend = relstart + sec->reloc_count;
6587 for (rel = relstart; rel < relend; )
6588 {
6589 enum elf_ppc64_reloc_type r_type;
6590 unsigned long r_symndx;
6591 asection *sym_sec;
6592 struct elf_link_hash_entry *h;
6593 Elf_Internal_Sym *sym;
6594
6595 /* .opd contains a regular array of 16 or 24 byte entries. We're
6596 only interested in the reloc pointing to a function entry
6597 point. */
6598 if (rel->r_offset != offset
6599 || rel + 1 >= relend
6600 || (rel + 1)->r_offset != offset + 8)
6601 {
6602 /* If someone messes with .opd alignment then after a
6603 "ld -r" we might have padding in the middle of .opd.
6604 Also, there's nothing to prevent someone putting
6605 something silly in .opd with the assembler. No .opd
6606 optimization for them! */
6607 broken_opd:
6608 (*_bfd_error_handler)
6609 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6610 need_edit = FALSE;
6611 break;
6612 }
6613
6614 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6615 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6616 {
6617 (*_bfd_error_handler)
6618 (_("%B: unexpected reloc type %u in .opd section"),
6619 ibfd, r_type);
6620 need_edit = FALSE;
6621 break;
6622 }
6623
6624 r_symndx = ELF64_R_SYM (rel->r_info);
6625 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6626 r_symndx, ibfd))
6627 goto error_ret;
6628
6629 if (sym_sec == NULL || sym_sec->owner == NULL)
6630 {
6631 const char *sym_name;
6632 if (h != NULL)
6633 sym_name = h->root.root.string;
6634 else
6635 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6636 sym_sec);
6637
6638 (*_bfd_error_handler)
6639 (_("%B: undefined sym `%s' in .opd section"),
6640 ibfd, sym_name);
6641 need_edit = FALSE;
6642 break;
6643 }
6644
6645 /* opd entries are always for functions defined in the
6646 current input bfd. If the symbol isn't defined in the
6647 input bfd, then we won't be using the function in this
6648 bfd; It must be defined in a linkonce section in another
6649 bfd, or is weak. It's also possible that we are
6650 discarding the function due to a linker script /DISCARD/,
6651 which we test for via the output_section. */
6652 if (sym_sec->owner != ibfd
6653 || sym_sec->output_section == bfd_abs_section_ptr)
6654 need_edit = TRUE;
6655
6656 rel += 2;
6657 if (rel == relend
6658 || (rel + 1 == relend && rel->r_offset == offset + 16))
6659 {
6660 if (sec->size == offset + 24)
6661 {
6662 need_pad = NULL;
6663 break;
6664 }
6665 if (rel == relend && sec->size == offset + 16)
6666 {
6667 cnt_16b++;
6668 break;
6669 }
6670 goto broken_opd;
6671 }
6672
6673 if (rel->r_offset == offset + 24)
6674 offset += 24;
6675 else if (rel->r_offset != offset + 16)
6676 goto broken_opd;
6677 else if (rel + 1 < relend
6678 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6679 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6680 {
6681 offset += 16;
6682 cnt_16b++;
6683 }
6684 else if (rel + 2 < relend
6685 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6686 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6687 {
6688 offset += 24;
6689 rel += 1;
6690 }
6691 else
6692 goto broken_opd;
6693 }
6694
6695 add_aux_fields = non_overlapping && cnt_16b > 0;
6696
6697 if (need_edit || add_aux_fields)
6698 {
6699 Elf_Internal_Rela *write_rel;
6700 bfd_byte *rptr, *wptr;
6701 bfd_byte *new_contents = NULL;
6702 bfd_boolean skip;
6703 long opd_ent_size;
6704 bfd_size_type amt;
6705
6706 amt = sec->size * sizeof (long) / 8;
6707 opd = &ppc64_elf_section_data (sec)->u.opd;
6708 opd->adjust = bfd_zalloc (obfd, amt);
6709 if (opd->adjust == NULL)
6710 return FALSE;
6711 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6712
6713 /* This seems a waste of time as input .opd sections are all
6714 zeros as generated by gcc, but I suppose there's no reason
6715 this will always be so. We might start putting something in
6716 the third word of .opd entries. */
6717 if ((sec->flags & SEC_IN_MEMORY) == 0)
6718 {
6719 bfd_byte *loc;
6720 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6721 {
6722 if (loc != NULL)
6723 free (loc);
6724 error_ret:
6725 if (local_syms != NULL
6726 && symtab_hdr->contents != (unsigned char *) local_syms)
6727 free (local_syms);
6728 if (elf_section_data (sec)->relocs != relstart)
6729 free (relstart);
6730 return FALSE;
6731 }
6732 sec->contents = loc;
6733 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6734 }
6735
6736 elf_section_data (sec)->relocs = relstart;
6737
6738 new_contents = sec->contents;
6739 if (add_aux_fields)
6740 {
6741 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6742 if (new_contents == NULL)
6743 return FALSE;
6744 need_pad = FALSE;
6745 }
6746 wptr = new_contents;
6747 rptr = sec->contents;
6748
6749 write_rel = relstart;
6750 skip = FALSE;
6751 offset = 0;
6752 opd_ent_size = 0;
6753 for (rel = relstart; rel < relend; rel++)
6754 {
6755 unsigned long r_symndx;
6756 asection *sym_sec;
6757 struct elf_link_hash_entry *h;
6758 Elf_Internal_Sym *sym;
6759
6760 r_symndx = ELF64_R_SYM (rel->r_info);
6761 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6762 r_symndx, ibfd))
6763 goto error_ret;
6764
6765 if (rel->r_offset == offset)
6766 {
6767 struct ppc_link_hash_entry *fdh = NULL;
6768
6769 /* See if the .opd entry is full 24 byte or
6770 16 byte (with fd_aux entry overlapped with next
6771 fd_func). */
6772 opd_ent_size = 24;
6773 if ((rel + 2 == relend && sec->size == offset + 16)
6774 || (rel + 3 < relend
6775 && rel[2].r_offset == offset + 16
6776 && rel[3].r_offset == offset + 24
6777 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6778 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6779 opd_ent_size = 16;
6780
6781 if (h != NULL
6782 && h->root.root.string[0] == '.')
6783 {
6784 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6785 ppc_hash_table (info));
6786 if (fdh != NULL
6787 && fdh->elf.root.type != bfd_link_hash_defined
6788 && fdh->elf.root.type != bfd_link_hash_defweak)
6789 fdh = NULL;
6790 }
6791
6792 skip = (sym_sec->owner != ibfd
6793 || sym_sec->output_section == bfd_abs_section_ptr);
6794 if (skip)
6795 {
6796 if (fdh != NULL && sym_sec->owner == ibfd)
6797 {
6798 /* Arrange for the function descriptor sym
6799 to be dropped. */
6800 fdh->elf.root.u.def.value = 0;
6801 fdh->elf.root.u.def.section = sym_sec;
6802 }
6803 opd->adjust[rel->r_offset / 8] = -1;
6804 }
6805 else
6806 {
6807 /* We'll be keeping this opd entry. */
6808
6809 if (fdh != NULL)
6810 {
6811 /* Redefine the function descriptor symbol to
6812 this location in the opd section. It is
6813 necessary to update the value here rather
6814 than using an array of adjustments as we do
6815 for local symbols, because various places
6816 in the generic ELF code use the value
6817 stored in u.def.value. */
6818 fdh->elf.root.u.def.value = wptr - new_contents;
6819 fdh->adjust_done = 1;
6820 }
6821
6822 /* Local syms are a bit tricky. We could
6823 tweak them as they can be cached, but
6824 we'd need to look through the local syms
6825 for the function descriptor sym which we
6826 don't have at the moment. So keep an
6827 array of adjustments. */
6828 opd->adjust[rel->r_offset / 8]
6829 = (wptr - new_contents) - (rptr - sec->contents);
6830
6831 if (wptr != rptr)
6832 memcpy (wptr, rptr, opd_ent_size);
6833 wptr += opd_ent_size;
6834 if (add_aux_fields && opd_ent_size == 16)
6835 {
6836 memset (wptr, '\0', 8);
6837 wptr += 8;
6838 }
6839 }
6840 rptr += opd_ent_size;
6841 offset += opd_ent_size;
6842 }
6843
6844 if (skip)
6845 {
6846 if (!NO_OPD_RELOCS
6847 && !info->relocatable
6848 && !dec_dynrel_count (rel->r_info, sec, info,
6849 NULL, h, sym_sec))
6850 goto error_ret;
6851 }
6852 else
6853 {
6854 /* We need to adjust any reloc offsets to point to the
6855 new opd entries. While we're at it, we may as well
6856 remove redundant relocs. */
6857 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
6858 if (write_rel != rel)
6859 memcpy (write_rel, rel, sizeof (*rel));
6860 ++write_rel;
6861 }
6862 }
6863
6864 sec->size = wptr - new_contents;
6865 sec->reloc_count = write_rel - relstart;
6866 if (add_aux_fields)
6867 {
6868 free (sec->contents);
6869 sec->contents = new_contents;
6870 }
6871
6872 /* Fudge the header size too, as this is used later in
6873 elf_bfd_final_link if we are emitting relocs. */
6874 elf_section_data (sec)->rel_hdr.sh_size
6875 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6876 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6877 some_edited = TRUE;
6878 }
6879 else if (elf_section_data (sec)->relocs != relstart)
6880 free (relstart);
6881
6882 if (local_syms != NULL
6883 && symtab_hdr->contents != (unsigned char *) local_syms)
6884 {
6885 if (!info->keep_memory)
6886 free (local_syms);
6887 else
6888 symtab_hdr->contents = (unsigned char *) local_syms;
6889 }
6890 }
6891
6892 if (some_edited)
6893 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6894
6895 /* If we are doing a final link and the last .opd entry is just 16 byte
6896 long, add a 8 byte padding after it. */
6897 if (need_pad != NULL && !info->relocatable)
6898 {
6899 bfd_byte *p;
6900
6901 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6902 {
6903 BFD_ASSERT (need_pad->size > 0);
6904
6905 p = bfd_malloc (need_pad->size + 8);
6906 if (p == NULL)
6907 return FALSE;
6908
6909 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6910 p, 0, need_pad->size))
6911 return FALSE;
6912
6913 need_pad->contents = p;
6914 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6915 }
6916 else
6917 {
6918 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6919 if (p == NULL)
6920 return FALSE;
6921
6922 need_pad->contents = p;
6923 }
6924
6925 memset (need_pad->contents + need_pad->size, 0, 8);
6926 need_pad->size += 8;
6927 }
6928
6929 return TRUE;
6930 }
6931
6932 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6933
6934 asection *
6935 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6936 {
6937 struct ppc_link_hash_table *htab;
6938
6939 htab = ppc_hash_table (info);
6940 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
6941 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
6942 FALSE, FALSE, TRUE));
6943 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
6944 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
6945 FALSE, FALSE, TRUE));
6946 return _bfd_elf_tls_setup (obfd, info);
6947 }
6948
6949 /* Return TRUE iff REL is a branch reloc with a global symbol matching
6950 HASH1 or HASH2. */
6951
6952 static bfd_boolean
6953 branch_reloc_hash_match (const bfd *ibfd,
6954 const Elf_Internal_Rela *rel,
6955 const struct ppc_link_hash_entry *hash1,
6956 const struct ppc_link_hash_entry *hash2)
6957 {
6958 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6959 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
6960 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
6961
6962 if (r_symndx >= symtab_hdr->sh_info
6963 && (r_type == R_PPC64_REL24
6964 || r_type == R_PPC64_REL14
6965 || r_type == R_PPC64_REL14_BRTAKEN
6966 || r_type == R_PPC64_REL14_BRNTAKEN
6967 || r_type == R_PPC64_ADDR24
6968 || r_type == R_PPC64_ADDR14
6969 || r_type == R_PPC64_ADDR14_BRTAKEN
6970 || r_type == R_PPC64_ADDR14_BRNTAKEN))
6971 {
6972 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6973 struct elf_link_hash_entry *h;
6974
6975 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6976 while (h->root.type == bfd_link_hash_indirect
6977 || h->root.type == bfd_link_hash_warning)
6978 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6979 if (h == &hash1->elf || h == &hash2->elf)
6980 return TRUE;
6981 }
6982 return FALSE;
6983 }
6984
6985 /* Run through all the TLS relocs looking for optimization
6986 opportunities. The linker has been hacked (see ppc64elf.em) to do
6987 a preliminary section layout so that we know the TLS segment
6988 offsets. We can't optimize earlier because some optimizations need
6989 to know the tp offset, and we need to optimize before allocating
6990 dynamic relocations. */
6991
6992 bfd_boolean
6993 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6994 {
6995 bfd *ibfd;
6996 asection *sec;
6997 struct ppc_link_hash_table *htab;
6998 int pass;
6999
7000 if (info->relocatable || !info->executable)
7001 return TRUE;
7002
7003 htab = ppc_hash_table (info);
7004 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7005 {
7006 Elf_Internal_Sym *locsyms = NULL;
7007 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7008 unsigned char *toc_ref = NULL;
7009
7010 /* Look at all the sections for this file. Make two passes over
7011 the relocs. On the first pass, mark toc entries involved
7012 with tls relocs, and check that tls relocs involved in
7013 setting up a tls_get_addr call are indeed followed by such a
7014 call. If they are not, exclude them from the optimizations
7015 done on the second pass. */
7016 for (pass = 0; pass < 2; ++pass)
7017 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7018 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7019 {
7020 Elf_Internal_Rela *relstart, *rel, *relend;
7021
7022 /* Read the relocations. */
7023 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7024 info->keep_memory);
7025 if (relstart == NULL)
7026 return FALSE;
7027
7028 relend = relstart + sec->reloc_count;
7029 for (rel = relstart; rel < relend; rel++)
7030 {
7031 enum elf_ppc64_reloc_type r_type;
7032 unsigned long r_symndx;
7033 struct elf_link_hash_entry *h;
7034 Elf_Internal_Sym *sym;
7035 asection *sym_sec;
7036 char *tls_mask;
7037 char tls_set, tls_clear, tls_type = 0;
7038 bfd_vma value;
7039 bfd_boolean ok_tprel, is_local;
7040 long toc_ref_index = 0;
7041 int expecting_tls_get_addr = 0;
7042
7043 r_symndx = ELF64_R_SYM (rel->r_info);
7044 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7045 r_symndx, ibfd))
7046 {
7047 err_free_rel:
7048 if (elf_section_data (sec)->relocs != relstart)
7049 free (relstart);
7050 if (toc_ref != NULL)
7051 free (toc_ref);
7052 if (locsyms != NULL
7053 && (elf_symtab_hdr (ibfd).contents
7054 != (unsigned char *) locsyms))
7055 free (locsyms);
7056 return FALSE;
7057 }
7058
7059 if (h != NULL)
7060 {
7061 if (h->root.type != bfd_link_hash_defined
7062 && h->root.type != bfd_link_hash_defweak)
7063 continue;
7064 value = h->root.u.def.value;
7065 }
7066 else
7067 /* Symbols referenced by TLS relocs must be of type
7068 STT_TLS. So no need for .opd local sym adjust. */
7069 value = sym->st_value;
7070
7071 ok_tprel = FALSE;
7072 is_local = FALSE;
7073 if (h == NULL
7074 || !h->def_dynamic)
7075 {
7076 is_local = TRUE;
7077 value += sym_sec->output_offset;
7078 value += sym_sec->output_section->vma;
7079 value -= htab->elf.tls_sec->vma;
7080 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7081 < (bfd_vma) 1 << 32);
7082 }
7083
7084 r_type = ELF64_R_TYPE (rel->r_info);
7085 switch (r_type)
7086 {
7087 case R_PPC64_GOT_TLSLD16:
7088 case R_PPC64_GOT_TLSLD16_LO:
7089 expecting_tls_get_addr = 1;
7090 /* Fall thru */
7091
7092 case R_PPC64_GOT_TLSLD16_HI:
7093 case R_PPC64_GOT_TLSLD16_HA:
7094 /* These relocs should never be against a symbol
7095 defined in a shared lib. Leave them alone if
7096 that turns out to be the case. */
7097 if (!is_local)
7098 continue;
7099
7100 /* LD -> LE */
7101 tls_set = 0;
7102 tls_clear = TLS_LD;
7103 tls_type = TLS_TLS | TLS_LD;
7104 break;
7105
7106 case R_PPC64_GOT_TLSGD16:
7107 case R_PPC64_GOT_TLSGD16_LO:
7108 expecting_tls_get_addr = 1;
7109 /* Fall thru */
7110
7111 case R_PPC64_GOT_TLSGD16_HI:
7112 case R_PPC64_GOT_TLSGD16_HA:
7113 if (ok_tprel)
7114 /* GD -> LE */
7115 tls_set = 0;
7116 else
7117 /* GD -> IE */
7118 tls_set = TLS_TLS | TLS_TPRELGD;
7119 tls_clear = TLS_GD;
7120 tls_type = TLS_TLS | TLS_GD;
7121 break;
7122
7123 case R_PPC64_GOT_TPREL16_DS:
7124 case R_PPC64_GOT_TPREL16_LO_DS:
7125 case R_PPC64_GOT_TPREL16_HI:
7126 case R_PPC64_GOT_TPREL16_HA:
7127 if (ok_tprel)
7128 {
7129 /* IE -> LE */
7130 tls_set = 0;
7131 tls_clear = TLS_TPREL;
7132 tls_type = TLS_TLS | TLS_TPREL;
7133 break;
7134 }
7135 continue;
7136
7137 case R_PPC64_TOC16:
7138 case R_PPC64_TOC16_LO:
7139 case R_PPC64_TLS:
7140 case R_PPC64_TLSGD:
7141 case R_PPC64_TLSLD:
7142 if (sym_sec == NULL || sym_sec != toc)
7143 continue;
7144
7145 /* Mark this toc entry as referenced by a TLS
7146 code sequence. We can do that now in the
7147 case of R_PPC64_TLS, and after checking for
7148 tls_get_addr for the TOC16 relocs. */
7149 if (toc_ref == NULL)
7150 {
7151 toc_ref = bfd_zmalloc (toc->size / 8);
7152 if (toc_ref == NULL)
7153 goto err_free_rel;
7154 }
7155 if (h != NULL)
7156 value = h->root.u.def.value;
7157 else
7158 value = sym->st_value;
7159 value += rel->r_addend;
7160 BFD_ASSERT (value < toc->size && value % 8 == 0);
7161 toc_ref_index = value / 8;
7162 if (r_type == R_PPC64_TLS
7163 || r_type == R_PPC64_TLSGD
7164 || r_type == R_PPC64_TLSLD)
7165 {
7166 toc_ref[toc_ref_index] = 1;
7167 continue;
7168 }
7169
7170 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7171 continue;
7172
7173 tls_set = 0;
7174 tls_clear = 0;
7175 expecting_tls_get_addr = 2;
7176 break;
7177
7178 case R_PPC64_TPREL64:
7179 if (pass == 0
7180 || sec != toc
7181 || toc_ref == NULL
7182 || !toc_ref[rel->r_offset / 8])
7183 continue;
7184 if (ok_tprel)
7185 {
7186 /* IE -> LE */
7187 tls_set = TLS_EXPLICIT;
7188 tls_clear = TLS_TPREL;
7189 break;
7190 }
7191 continue;
7192
7193 case R_PPC64_DTPMOD64:
7194 if (pass == 0
7195 || sec != toc
7196 || toc_ref == NULL
7197 || !toc_ref[rel->r_offset / 8])
7198 continue;
7199 if (rel + 1 < relend
7200 && (rel[1].r_info
7201 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7202 && rel[1].r_offset == rel->r_offset + 8)
7203 {
7204 if (ok_tprel)
7205 /* GD -> LE */
7206 tls_set = TLS_EXPLICIT | TLS_GD;
7207 else
7208 /* GD -> IE */
7209 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7210 tls_clear = TLS_GD;
7211 }
7212 else
7213 {
7214 if (!is_local)
7215 continue;
7216
7217 /* LD -> LE */
7218 tls_set = TLS_EXPLICIT;
7219 tls_clear = TLS_LD;
7220 }
7221 break;
7222
7223 default:
7224 continue;
7225 }
7226
7227 if (pass == 0)
7228 {
7229 if (!expecting_tls_get_addr
7230 || !sec->has_tls_get_addr_call)
7231 continue;
7232
7233 if (rel + 1 < relend
7234 && branch_reloc_hash_match (ibfd, rel + 1,
7235 htab->tls_get_addr,
7236 htab->tls_get_addr_fd))
7237 {
7238 if (expecting_tls_get_addr == 2)
7239 {
7240 /* Check for toc tls entries. */
7241 char *toc_tls;
7242 int retval;
7243
7244 retval = get_tls_mask (&toc_tls, NULL, NULL,
7245 &locsyms,
7246 rel, ibfd);
7247 if (retval == 0)
7248 goto err_free_rel;
7249 if (retval > 1 && toc_tls != NULL)
7250 toc_ref[toc_ref_index] = 1;
7251 }
7252 continue;
7253 }
7254
7255 if (expecting_tls_get_addr != 1)
7256 continue;
7257
7258 /* Uh oh, we didn't find the expected call. We
7259 could just mark this symbol to exclude it
7260 from tls optimization but it's safer to skip
7261 the entire section. */
7262 sec->has_tls_reloc = 0;
7263 break;
7264 }
7265
7266 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7267 {
7268 struct plt_entry *ent;
7269 for (ent = htab->tls_get_addr->elf.plt.plist;
7270 ent != NULL;
7271 ent = ent->next)
7272 if (ent->addend == 0)
7273 {
7274 if (ent->plt.refcount > 0)
7275 {
7276 ent->plt.refcount -= 1;
7277 expecting_tls_get_addr = 0;
7278 }
7279 break;
7280 }
7281 }
7282
7283 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7284 {
7285 struct plt_entry *ent;
7286 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7287 ent != NULL;
7288 ent = ent->next)
7289 if (ent->addend == 0)
7290 {
7291 if (ent->plt.refcount > 0)
7292 ent->plt.refcount -= 1;
7293 break;
7294 }
7295 }
7296
7297 if (tls_clear == 0)
7298 continue;
7299
7300 if ((tls_set & TLS_EXPLICIT) == 0)
7301 {
7302 struct got_entry *ent;
7303
7304 /* Adjust got entry for this reloc. */
7305 if (h != NULL)
7306 ent = h->got.glist;
7307 else
7308 ent = elf_local_got_ents (ibfd)[r_symndx];
7309
7310 for (; ent != NULL; ent = ent->next)
7311 if (ent->addend == rel->r_addend
7312 && ent->owner == ibfd
7313 && ent->tls_type == tls_type)
7314 break;
7315 if (ent == NULL)
7316 abort ();
7317
7318 if (tls_set == 0)
7319 {
7320 /* We managed to get rid of a got entry. */
7321 if (ent->got.refcount > 0)
7322 ent->got.refcount -= 1;
7323 }
7324 }
7325 else
7326 {
7327 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7328 we'll lose one or two dyn relocs. */
7329 if (!dec_dynrel_count (rel->r_info, sec, info,
7330 NULL, h, sym_sec))
7331 return FALSE;
7332
7333 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7334 {
7335 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7336 NULL, h, sym_sec))
7337 return FALSE;
7338 }
7339 }
7340
7341 *tls_mask |= tls_set;
7342 *tls_mask &= ~tls_clear;
7343 }
7344
7345 if (elf_section_data (sec)->relocs != relstart)
7346 free (relstart);
7347 }
7348
7349 if (toc_ref != NULL)
7350 free (toc_ref);
7351
7352 if (locsyms != NULL
7353 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7354 {
7355 if (!info->keep_memory)
7356 free (locsyms);
7357 else
7358 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7359 }
7360 }
7361 return TRUE;
7362 }
7363
7364 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7365 the values of any global symbols in a toc section that has been
7366 edited. Globals in toc sections should be a rarity, so this function
7367 sets a flag if any are found in toc sections other than the one just
7368 edited, so that futher hash table traversals can be avoided. */
7369
7370 struct adjust_toc_info
7371 {
7372 asection *toc;
7373 unsigned long *skip;
7374 bfd_boolean global_toc_syms;
7375 };
7376
7377 static bfd_boolean
7378 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7379 {
7380 struct ppc_link_hash_entry *eh;
7381 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7382
7383 if (h->root.type == bfd_link_hash_indirect)
7384 return TRUE;
7385
7386 if (h->root.type == bfd_link_hash_warning)
7387 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7388
7389 if (h->root.type != bfd_link_hash_defined
7390 && h->root.type != bfd_link_hash_defweak)
7391 return TRUE;
7392
7393 eh = (struct ppc_link_hash_entry *) h;
7394 if (eh->adjust_done)
7395 return TRUE;
7396
7397 if (eh->elf.root.u.def.section == toc_inf->toc)
7398 {
7399 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7400 if (skip != (unsigned long) -1)
7401 eh->elf.root.u.def.value -= skip;
7402 else
7403 {
7404 (*_bfd_error_handler)
7405 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7406 eh->elf.root.u.def.section = &bfd_abs_section;
7407 eh->elf.root.u.def.value = 0;
7408 }
7409 eh->adjust_done = 1;
7410 }
7411 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7412 toc_inf->global_toc_syms = TRUE;
7413
7414 return TRUE;
7415 }
7416
7417 /* Examine all relocs referencing .toc sections in order to remove
7418 unused .toc entries. */
7419
7420 bfd_boolean
7421 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7422 {
7423 bfd *ibfd;
7424 struct adjust_toc_info toc_inf;
7425
7426 toc_inf.global_toc_syms = TRUE;
7427 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7428 {
7429 asection *toc, *sec;
7430 Elf_Internal_Shdr *symtab_hdr;
7431 Elf_Internal_Sym *local_syms;
7432 struct elf_link_hash_entry **sym_hashes;
7433 Elf_Internal_Rela *relstart, *rel;
7434 unsigned long *skip, *drop;
7435 unsigned char *used;
7436 unsigned char *keep, last, some_unused;
7437
7438 toc = bfd_get_section_by_name (ibfd, ".toc");
7439 if (toc == NULL
7440 || toc->size == 0
7441 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7442 || elf_discarded_section (toc))
7443 continue;
7444
7445 local_syms = NULL;
7446 symtab_hdr = &elf_symtab_hdr (ibfd);
7447 sym_hashes = elf_sym_hashes (ibfd);
7448
7449 /* Look at sections dropped from the final link. */
7450 skip = NULL;
7451 relstart = NULL;
7452 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7453 {
7454 if (sec->reloc_count == 0
7455 || !elf_discarded_section (sec)
7456 || get_opd_info (sec)
7457 || (sec->flags & SEC_ALLOC) == 0
7458 || (sec->flags & SEC_DEBUGGING) != 0)
7459 continue;
7460
7461 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7462 if (relstart == NULL)
7463 goto error_ret;
7464
7465 /* Run through the relocs to see which toc entries might be
7466 unused. */
7467 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7468 {
7469 enum elf_ppc64_reloc_type r_type;
7470 unsigned long r_symndx;
7471 asection *sym_sec;
7472 struct elf_link_hash_entry *h;
7473 Elf_Internal_Sym *sym;
7474 bfd_vma val;
7475
7476 r_type = ELF64_R_TYPE (rel->r_info);
7477 switch (r_type)
7478 {
7479 default:
7480 continue;
7481
7482 case R_PPC64_TOC16:
7483 case R_PPC64_TOC16_LO:
7484 case R_PPC64_TOC16_HI:
7485 case R_PPC64_TOC16_HA:
7486 case R_PPC64_TOC16_DS:
7487 case R_PPC64_TOC16_LO_DS:
7488 break;
7489 }
7490
7491 r_symndx = ELF64_R_SYM (rel->r_info);
7492 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7493 r_symndx, ibfd))
7494 goto error_ret;
7495
7496 if (sym_sec != toc)
7497 continue;
7498
7499 if (h != NULL)
7500 val = h->root.u.def.value;
7501 else
7502 val = sym->st_value;
7503 val += rel->r_addend;
7504
7505 if (val >= toc->size)
7506 continue;
7507
7508 /* Anything in the toc ought to be aligned to 8 bytes.
7509 If not, don't mark as unused. */
7510 if (val & 7)
7511 continue;
7512
7513 if (skip == NULL)
7514 {
7515 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7516 if (skip == NULL)
7517 goto error_ret;
7518 }
7519
7520 skip[val >> 3] = 1;
7521 }
7522
7523 if (elf_section_data (sec)->relocs != relstart)
7524 free (relstart);
7525 }
7526
7527 if (skip == NULL)
7528 continue;
7529
7530 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7531 if (used == NULL)
7532 {
7533 error_ret:
7534 if (local_syms != NULL
7535 && symtab_hdr->contents != (unsigned char *) local_syms)
7536 free (local_syms);
7537 if (sec != NULL
7538 && relstart != NULL
7539 && elf_section_data (sec)->relocs != relstart)
7540 free (relstart);
7541 if (skip != NULL)
7542 free (skip);
7543 return FALSE;
7544 }
7545
7546 /* Now check all kept sections that might reference the toc.
7547 Check the toc itself last. */
7548 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7549 : ibfd->sections);
7550 sec != NULL;
7551 sec = (sec == toc ? NULL
7552 : sec->next == NULL ? toc
7553 : sec->next == toc && toc->next ? toc->next
7554 : sec->next))
7555 {
7556 int repeat;
7557
7558 if (sec->reloc_count == 0
7559 || elf_discarded_section (sec)
7560 || get_opd_info (sec)
7561 || (sec->flags & SEC_ALLOC) == 0
7562 || (sec->flags & SEC_DEBUGGING) != 0)
7563 continue;
7564
7565 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7566 if (relstart == NULL)
7567 goto error_ret;
7568
7569 /* Mark toc entries referenced as used. */
7570 repeat = 0;
7571 do
7572 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7573 {
7574 enum elf_ppc64_reloc_type r_type;
7575 unsigned long r_symndx;
7576 asection *sym_sec;
7577 struct elf_link_hash_entry *h;
7578 Elf_Internal_Sym *sym;
7579 bfd_vma val;
7580
7581 r_type = ELF64_R_TYPE (rel->r_info);
7582 switch (r_type)
7583 {
7584 case R_PPC64_TOC16:
7585 case R_PPC64_TOC16_LO:
7586 case R_PPC64_TOC16_HI:
7587 case R_PPC64_TOC16_HA:
7588 case R_PPC64_TOC16_DS:
7589 case R_PPC64_TOC16_LO_DS:
7590 /* In case we're taking addresses of toc entries. */
7591 case R_PPC64_ADDR64:
7592 break;
7593
7594 default:
7595 continue;
7596 }
7597
7598 r_symndx = ELF64_R_SYM (rel->r_info);
7599 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7600 r_symndx, ibfd))
7601 {
7602 free (used);
7603 goto error_ret;
7604 }
7605
7606 if (sym_sec != toc)
7607 continue;
7608
7609 if (h != NULL)
7610 val = h->root.u.def.value;
7611 else
7612 val = sym->st_value;
7613 val += rel->r_addend;
7614
7615 if (val >= toc->size)
7616 continue;
7617
7618 /* For the toc section, we only mark as used if
7619 this entry itself isn't unused. */
7620 if (sec == toc
7621 && !used[val >> 3]
7622 && (used[rel->r_offset >> 3]
7623 || !skip[rel->r_offset >> 3]))
7624 /* Do all the relocs again, to catch reference
7625 chains. */
7626 repeat = 1;
7627
7628 used[val >> 3] = 1;
7629 }
7630 while (repeat);
7631 }
7632
7633 /* Merge the used and skip arrays. Assume that TOC
7634 doublewords not appearing as either used or unused belong
7635 to to an entry more than one doubleword in size. */
7636 for (drop = skip, keep = used, last = 0, some_unused = 0;
7637 drop < skip + (toc->size + 7) / 8;
7638 ++drop, ++keep)
7639 {
7640 if (*keep)
7641 {
7642 *drop = 0;
7643 last = 0;
7644 }
7645 else if (*drop)
7646 {
7647 some_unused = 1;
7648 last = 1;
7649 }
7650 else
7651 *drop = last;
7652 }
7653
7654 free (used);
7655
7656 if (some_unused)
7657 {
7658 bfd_byte *contents, *src;
7659 unsigned long off;
7660
7661 /* Shuffle the toc contents, and at the same time convert the
7662 skip array from booleans into offsets. */
7663 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7664 goto error_ret;
7665
7666 elf_section_data (toc)->this_hdr.contents = contents;
7667
7668 for (src = contents, off = 0, drop = skip;
7669 src < contents + toc->size;
7670 src += 8, ++drop)
7671 {
7672 if (*drop)
7673 {
7674 *drop = (unsigned long) -1;
7675 off += 8;
7676 }
7677 else if (off != 0)
7678 {
7679 *drop = off;
7680 memcpy (src - off, src, 8);
7681 }
7682 }
7683 toc->rawsize = toc->size;
7684 toc->size = src - contents - off;
7685
7686 if (toc->reloc_count != 0)
7687 {
7688 Elf_Internal_Rela *wrel;
7689 bfd_size_type sz;
7690
7691 /* Read toc relocs. */
7692 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7693 TRUE);
7694 if (relstart == NULL)
7695 goto error_ret;
7696
7697 /* Remove unused toc relocs, and adjust those we keep. */
7698 wrel = relstart;
7699 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7700 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7701 {
7702 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7703 wrel->r_info = rel->r_info;
7704 wrel->r_addend = rel->r_addend;
7705 ++wrel;
7706 }
7707 else if (!dec_dynrel_count (rel->r_info, toc, info,
7708 &local_syms, NULL, NULL))
7709 goto error_ret;
7710
7711 toc->reloc_count = wrel - relstart;
7712 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7713 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7714 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7715 }
7716
7717 /* Adjust addends for relocs against the toc section sym. */
7718 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7719 {
7720 if (sec->reloc_count == 0
7721 || elf_discarded_section (sec))
7722 continue;
7723
7724 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7725 TRUE);
7726 if (relstart == NULL)
7727 goto error_ret;
7728
7729 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7730 {
7731 enum elf_ppc64_reloc_type r_type;
7732 unsigned long r_symndx;
7733 asection *sym_sec;
7734 struct elf_link_hash_entry *h;
7735 Elf_Internal_Sym *sym;
7736
7737 r_type = ELF64_R_TYPE (rel->r_info);
7738 switch (r_type)
7739 {
7740 default:
7741 continue;
7742
7743 case R_PPC64_TOC16:
7744 case R_PPC64_TOC16_LO:
7745 case R_PPC64_TOC16_HI:
7746 case R_PPC64_TOC16_HA:
7747 case R_PPC64_TOC16_DS:
7748 case R_PPC64_TOC16_LO_DS:
7749 case R_PPC64_ADDR64:
7750 break;
7751 }
7752
7753 r_symndx = ELF64_R_SYM (rel->r_info);
7754 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7755 r_symndx, ibfd))
7756 goto error_ret;
7757
7758 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7759 continue;
7760
7761 rel->r_addend -= skip[rel->r_addend >> 3];
7762 }
7763 }
7764
7765 /* We shouldn't have local or global symbols defined in the TOC,
7766 but handle them anyway. */
7767 if (local_syms != NULL)
7768 {
7769 Elf_Internal_Sym *sym;
7770
7771 for (sym = local_syms;
7772 sym < local_syms + symtab_hdr->sh_info;
7773 ++sym)
7774 if (sym->st_value != 0
7775 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7776 {
7777 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7778 sym->st_value -= skip[sym->st_value >> 3];
7779 else
7780 {
7781 (*_bfd_error_handler)
7782 (_("%s defined in removed toc entry"),
7783 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7784 NULL));
7785 sym->st_value = 0;
7786 sym->st_shndx = SHN_ABS;
7787 }
7788 symtab_hdr->contents = (unsigned char *) local_syms;
7789 }
7790 }
7791
7792 /* Finally, adjust any global syms defined in the toc. */
7793 if (toc_inf.global_toc_syms)
7794 {
7795 toc_inf.toc = toc;
7796 toc_inf.skip = skip;
7797 toc_inf.global_toc_syms = FALSE;
7798 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7799 &toc_inf);
7800 }
7801 }
7802
7803 if (local_syms != NULL
7804 && symtab_hdr->contents != (unsigned char *) local_syms)
7805 {
7806 if (!info->keep_memory)
7807 free (local_syms);
7808 else
7809 symtab_hdr->contents = (unsigned char *) local_syms;
7810 }
7811 free (skip);
7812 }
7813
7814 return TRUE;
7815 }
7816
7817 /* Allocate space in .plt, .got and associated reloc sections for
7818 dynamic relocs. */
7819
7820 static bfd_boolean
7821 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7822 {
7823 struct bfd_link_info *info;
7824 struct ppc_link_hash_table *htab;
7825 asection *s;
7826 struct ppc_link_hash_entry *eh;
7827 struct ppc_dyn_relocs *p;
7828 struct got_entry *gent;
7829
7830 if (h->root.type == bfd_link_hash_indirect)
7831 return TRUE;
7832
7833 if (h->root.type == bfd_link_hash_warning)
7834 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7835
7836 info = (struct bfd_link_info *) inf;
7837 htab = ppc_hash_table (info);
7838
7839 if (htab->elf.dynamic_sections_created
7840 && h->dynindx != -1
7841 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7842 {
7843 struct plt_entry *pent;
7844 bfd_boolean doneone = FALSE;
7845 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7846 if (pent->plt.refcount > 0)
7847 {
7848 /* If this is the first .plt entry, make room for the special
7849 first entry. */
7850 s = htab->plt;
7851 if (s->size == 0)
7852 s->size += PLT_INITIAL_ENTRY_SIZE;
7853
7854 pent->plt.offset = s->size;
7855
7856 /* Make room for this entry. */
7857 s->size += PLT_ENTRY_SIZE;
7858
7859 /* Make room for the .glink code. */
7860 s = htab->glink;
7861 if (s->size == 0)
7862 s->size += GLINK_CALL_STUB_SIZE;
7863 /* We need bigger stubs past index 32767. */
7864 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7865 s->size += 4;
7866 s->size += 2*4;
7867
7868 /* We also need to make an entry in the .rela.plt section. */
7869 s = htab->relplt;
7870 s->size += sizeof (Elf64_External_Rela);
7871 doneone = TRUE;
7872 }
7873 else
7874 pent->plt.offset = (bfd_vma) -1;
7875 if (!doneone)
7876 {
7877 h->plt.plist = NULL;
7878 h->needs_plt = 0;
7879 }
7880 }
7881 else
7882 {
7883 h->plt.plist = NULL;
7884 h->needs_plt = 0;
7885 }
7886
7887 eh = (struct ppc_link_hash_entry *) h;
7888 /* Run through the TLS GD got entries first if we're changing them
7889 to TPREL. */
7890 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7891 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7892 if (gent->got.refcount > 0
7893 && (gent->tls_type & TLS_GD) != 0)
7894 {
7895 /* This was a GD entry that has been converted to TPREL. If
7896 there happens to be a TPREL entry we can use that one. */
7897 struct got_entry *ent;
7898 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7899 if (ent->got.refcount > 0
7900 && (ent->tls_type & TLS_TPREL) != 0
7901 && ent->addend == gent->addend
7902 && ent->owner == gent->owner)
7903 {
7904 gent->got.refcount = 0;
7905 break;
7906 }
7907
7908 /* If not, then we'll be using our own TPREL entry. */
7909 if (gent->got.refcount != 0)
7910 gent->tls_type = TLS_TLS | TLS_TPREL;
7911 }
7912
7913 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7914 if (gent->got.refcount > 0)
7915 {
7916 bfd_boolean dyn;
7917
7918 /* Make sure this symbol is output as a dynamic symbol.
7919 Undefined weak syms won't yet be marked as dynamic,
7920 nor will all TLS symbols. */
7921 if (h->dynindx == -1
7922 && !h->forced_local
7923 && htab->elf.dynamic_sections_created)
7924 {
7925 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7926 return FALSE;
7927 }
7928
7929 if ((gent->tls_type & TLS_LD) != 0
7930 && !h->def_dynamic)
7931 {
7932 ppc64_tlsld_got (gent->owner)->refcount += 1;
7933 gent->got.offset = (bfd_vma) -1;
7934 continue;
7935 }
7936
7937 if (!is_ppc64_elf (gent->owner))
7938 continue;
7939
7940 s = ppc64_elf_tdata (gent->owner)->got;
7941 gent->got.offset = s->size;
7942 s->size
7943 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7944 dyn = htab->elf.dynamic_sections_created;
7945 if ((info->shared
7946 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7947 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7948 || h->root.type != bfd_link_hash_undefweak))
7949 ppc64_elf_tdata (gent->owner)->relgot->size
7950 += (gent->tls_type & eh->tls_mask & TLS_GD
7951 ? 2 * sizeof (Elf64_External_Rela)
7952 : sizeof (Elf64_External_Rela));
7953 }
7954 else
7955 gent->got.offset = (bfd_vma) -1;
7956
7957 if (eh->dyn_relocs == NULL
7958 || !htab->elf.dynamic_sections_created)
7959 return TRUE;
7960
7961 /* In the shared -Bsymbolic case, discard space allocated for
7962 dynamic pc-relative relocs against symbols which turn out to be
7963 defined in regular objects. For the normal shared case, discard
7964 space for relocs that have become local due to symbol visibility
7965 changes. */
7966
7967 if (info->shared)
7968 {
7969 /* Relocs that use pc_count are those that appear on a call insn,
7970 or certain REL relocs (see must_be_dyn_reloc) that can be
7971 generated via assembly. We want calls to protected symbols to
7972 resolve directly to the function rather than going via the plt.
7973 If people want function pointer comparisons to work as expected
7974 then they should avoid writing weird assembly. */
7975 if (SYMBOL_CALLS_LOCAL (info, h))
7976 {
7977 struct ppc_dyn_relocs **pp;
7978
7979 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7980 {
7981 p->count -= p->pc_count;
7982 p->pc_count = 0;
7983 if (p->count == 0)
7984 *pp = p->next;
7985 else
7986 pp = &p->next;
7987 }
7988 }
7989
7990 /* Also discard relocs on undefined weak syms with non-default
7991 visibility. */
7992 if (eh->dyn_relocs != NULL
7993 && h->root.type == bfd_link_hash_undefweak)
7994 {
7995 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7996 eh->dyn_relocs = NULL;
7997
7998 /* Make sure this symbol is output as a dynamic symbol.
7999 Undefined weak syms won't yet be marked as dynamic. */
8000 else if (h->dynindx == -1
8001 && !h->forced_local)
8002 {
8003 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8004 return FALSE;
8005 }
8006 }
8007 }
8008 else if (ELIMINATE_COPY_RELOCS)
8009 {
8010 /* For the non-shared case, discard space for relocs against
8011 symbols which turn out to need copy relocs or are not
8012 dynamic. */
8013
8014 if (!h->non_got_ref
8015 && !h->def_regular)
8016 {
8017 /* Make sure this symbol is output as a dynamic symbol.
8018 Undefined weak syms won't yet be marked as dynamic. */
8019 if (h->dynindx == -1
8020 && !h->forced_local)
8021 {
8022 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8023 return FALSE;
8024 }
8025
8026 /* If that succeeded, we know we'll be keeping all the
8027 relocs. */
8028 if (h->dynindx != -1)
8029 goto keep;
8030 }
8031
8032 eh->dyn_relocs = NULL;
8033
8034 keep: ;
8035 }
8036
8037 /* Finally, allocate space. */
8038 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8039 {
8040 asection *sreloc = elf_section_data (p->sec)->sreloc;
8041 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8042 }
8043
8044 return TRUE;
8045 }
8046
8047 /* Find any dynamic relocs that apply to read-only sections. */
8048
8049 static bfd_boolean
8050 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8051 {
8052 struct ppc_link_hash_entry *eh;
8053 struct ppc_dyn_relocs *p;
8054
8055 if (h->root.type == bfd_link_hash_warning)
8056 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8057
8058 eh = (struct ppc_link_hash_entry *) h;
8059 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8060 {
8061 asection *s = p->sec->output_section;
8062
8063 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8064 {
8065 struct bfd_link_info *info = inf;
8066
8067 info->flags |= DF_TEXTREL;
8068
8069 /* Not an error, just cut short the traversal. */
8070 return FALSE;
8071 }
8072 }
8073 return TRUE;
8074 }
8075
8076 /* Set the sizes of the dynamic sections. */
8077
8078 static bfd_boolean
8079 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8080 struct bfd_link_info *info)
8081 {
8082 struct ppc_link_hash_table *htab;
8083 bfd *dynobj;
8084 asection *s;
8085 bfd_boolean relocs;
8086 bfd *ibfd;
8087
8088 htab = ppc_hash_table (info);
8089 dynobj = htab->elf.dynobj;
8090 if (dynobj == NULL)
8091 abort ();
8092
8093 if (htab->elf.dynamic_sections_created)
8094 {
8095 /* Set the contents of the .interp section to the interpreter. */
8096 if (info->executable)
8097 {
8098 s = bfd_get_section_by_name (dynobj, ".interp");
8099 if (s == NULL)
8100 abort ();
8101 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8102 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8103 }
8104 }
8105
8106 /* Set up .got offsets for local syms, and space for local dynamic
8107 relocs. */
8108 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8109 {
8110 struct got_entry **lgot_ents;
8111 struct got_entry **end_lgot_ents;
8112 char *lgot_masks;
8113 bfd_size_type locsymcount;
8114 Elf_Internal_Shdr *symtab_hdr;
8115 asection *srel;
8116
8117 if (!is_ppc64_elf (ibfd))
8118 continue;
8119
8120 for (s = ibfd->sections; s != NULL; s = s->next)
8121 {
8122 struct ppc_dyn_relocs *p;
8123
8124 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8125 {
8126 if (!bfd_is_abs_section (p->sec)
8127 && bfd_is_abs_section (p->sec->output_section))
8128 {
8129 /* Input section has been discarded, either because
8130 it is a copy of a linkonce section or due to
8131 linker script /DISCARD/, so we'll be discarding
8132 the relocs too. */
8133 }
8134 else if (p->count != 0)
8135 {
8136 srel = elf_section_data (p->sec)->sreloc;
8137 srel->size += p->count * sizeof (Elf64_External_Rela);
8138 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8139 info->flags |= DF_TEXTREL;
8140 }
8141 }
8142 }
8143
8144 lgot_ents = elf_local_got_ents (ibfd);
8145 if (!lgot_ents)
8146 continue;
8147
8148 symtab_hdr = &elf_symtab_hdr (ibfd);
8149 locsymcount = symtab_hdr->sh_info;
8150 end_lgot_ents = lgot_ents + locsymcount;
8151 lgot_masks = (char *) end_lgot_ents;
8152 s = ppc64_elf_tdata (ibfd)->got;
8153 srel = ppc64_elf_tdata (ibfd)->relgot;
8154 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8155 {
8156 struct got_entry *ent;
8157
8158 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8159 if (ent->got.refcount > 0)
8160 {
8161 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8162 {
8163 ppc64_tlsld_got (ibfd)->refcount += 1;
8164 ent->got.offset = (bfd_vma) -1;
8165 }
8166 else
8167 {
8168 ent->got.offset = s->size;
8169 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8170 {
8171 s->size += 16;
8172 if (info->shared)
8173 srel->size += 2 * sizeof (Elf64_External_Rela);
8174 }
8175 else
8176 {
8177 s->size += 8;
8178 if (info->shared)
8179 srel->size += sizeof (Elf64_External_Rela);
8180 }
8181 }
8182 }
8183 else
8184 ent->got.offset = (bfd_vma) -1;
8185 }
8186 }
8187
8188 /* Allocate global sym .plt and .got entries, and space for global
8189 sym dynamic relocs. */
8190 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8191
8192 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8193 {
8194 if (!is_ppc64_elf (ibfd))
8195 continue;
8196
8197 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8198 {
8199 s = ppc64_elf_tdata (ibfd)->got;
8200 ppc64_tlsld_got (ibfd)->offset = s->size;
8201 s->size += 16;
8202 if (info->shared)
8203 {
8204 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8205 srel->size += sizeof (Elf64_External_Rela);
8206 }
8207 }
8208 else
8209 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8210 }
8211
8212 /* We now have determined the sizes of the various dynamic sections.
8213 Allocate memory for them. */
8214 relocs = FALSE;
8215 for (s = dynobj->sections; s != NULL; s = s->next)
8216 {
8217 if ((s->flags & SEC_LINKER_CREATED) == 0)
8218 continue;
8219
8220 if (s == htab->brlt || s == htab->relbrlt)
8221 /* These haven't been allocated yet; don't strip. */
8222 continue;
8223 else if (s == htab->got
8224 || s == htab->plt
8225 || s == htab->glink
8226 || s == htab->dynbss)
8227 {
8228 /* Strip this section if we don't need it; see the
8229 comment below. */
8230 }
8231 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8232 {
8233 if (s->size != 0)
8234 {
8235 if (s != htab->relplt)
8236 relocs = TRUE;
8237
8238 /* We use the reloc_count field as a counter if we need
8239 to copy relocs into the output file. */
8240 s->reloc_count = 0;
8241 }
8242 }
8243 else
8244 {
8245 /* It's not one of our sections, so don't allocate space. */
8246 continue;
8247 }
8248
8249 if (s->size == 0)
8250 {
8251 /* If we don't need this section, strip it from the
8252 output file. This is mostly to handle .rela.bss and
8253 .rela.plt. We must create both sections in
8254 create_dynamic_sections, because they must be created
8255 before the linker maps input sections to output
8256 sections. The linker does that before
8257 adjust_dynamic_symbol is called, and it is that
8258 function which decides whether anything needs to go
8259 into these sections. */
8260 s->flags |= SEC_EXCLUDE;
8261 continue;
8262 }
8263
8264 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8265 continue;
8266
8267 /* Allocate memory for the section contents. We use bfd_zalloc
8268 here in case unused entries are not reclaimed before the
8269 section's contents are written out. This should not happen,
8270 but this way if it does we get a R_PPC64_NONE reloc in .rela
8271 sections instead of garbage.
8272 We also rely on the section contents being zero when writing
8273 the GOT. */
8274 s->contents = bfd_zalloc (dynobj, s->size);
8275 if (s->contents == NULL)
8276 return FALSE;
8277 }
8278
8279 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8280 {
8281 if (!is_ppc64_elf (ibfd))
8282 continue;
8283
8284 s = ppc64_elf_tdata (ibfd)->got;
8285 if (s != NULL && s != htab->got)
8286 {
8287 if (s->size == 0)
8288 s->flags |= SEC_EXCLUDE;
8289 else
8290 {
8291 s->contents = bfd_zalloc (ibfd, s->size);
8292 if (s->contents == NULL)
8293 return FALSE;
8294 }
8295 }
8296 s = ppc64_elf_tdata (ibfd)->relgot;
8297 if (s != NULL)
8298 {
8299 if (s->size == 0)
8300 s->flags |= SEC_EXCLUDE;
8301 else
8302 {
8303 s->contents = bfd_zalloc (ibfd, s->size);
8304 if (s->contents == NULL)
8305 return FALSE;
8306 relocs = TRUE;
8307 s->reloc_count = 0;
8308 }
8309 }
8310 }
8311
8312 if (htab->elf.dynamic_sections_created)
8313 {
8314 /* Add some entries to the .dynamic section. We fill in the
8315 values later, in ppc64_elf_finish_dynamic_sections, but we
8316 must add the entries now so that we get the correct size for
8317 the .dynamic section. The DT_DEBUG entry is filled in by the
8318 dynamic linker and used by the debugger. */
8319 #define add_dynamic_entry(TAG, VAL) \
8320 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8321
8322 if (info->executable)
8323 {
8324 if (!add_dynamic_entry (DT_DEBUG, 0))
8325 return FALSE;
8326 }
8327
8328 if (htab->plt != NULL && htab->plt->size != 0)
8329 {
8330 if (!add_dynamic_entry (DT_PLTGOT, 0)
8331 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8332 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8333 || !add_dynamic_entry (DT_JMPREL, 0)
8334 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8335 return FALSE;
8336 }
8337
8338 if (NO_OPD_RELOCS)
8339 {
8340 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8341 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8342 return FALSE;
8343 }
8344
8345 if (relocs)
8346 {
8347 if (!add_dynamic_entry (DT_RELA, 0)
8348 || !add_dynamic_entry (DT_RELASZ, 0)
8349 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8350 return FALSE;
8351
8352 /* If any dynamic relocs apply to a read-only section,
8353 then we need a DT_TEXTREL entry. */
8354 if ((info->flags & DF_TEXTREL) == 0)
8355 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8356
8357 if ((info->flags & DF_TEXTREL) != 0)
8358 {
8359 if (!add_dynamic_entry (DT_TEXTREL, 0))
8360 return FALSE;
8361 }
8362 }
8363 }
8364 #undef add_dynamic_entry
8365
8366 return TRUE;
8367 }
8368
8369 /* Determine the type of stub needed, if any, for a call. */
8370
8371 static inline enum ppc_stub_type
8372 ppc_type_of_stub (asection *input_sec,
8373 const Elf_Internal_Rela *rel,
8374 struct ppc_link_hash_entry **hash,
8375 bfd_vma destination)
8376 {
8377 struct ppc_link_hash_entry *h = *hash;
8378 bfd_vma location;
8379 bfd_vma branch_offset;
8380 bfd_vma max_branch_offset;
8381 enum elf_ppc64_reloc_type r_type;
8382
8383 if (h != NULL)
8384 {
8385 struct ppc_link_hash_entry *fdh = h;
8386 if (fdh->oh != NULL
8387 && fdh->oh->is_func_descriptor)
8388 fdh = fdh->oh;
8389
8390 if (fdh->elf.dynindx != -1)
8391 {
8392 struct plt_entry *ent;
8393
8394 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8395 if (ent->addend == rel->r_addend
8396 && ent->plt.offset != (bfd_vma) -1)
8397 {
8398 *hash = fdh;
8399 return ppc_stub_plt_call;
8400 }
8401 }
8402
8403 /* Here, we know we don't have a plt entry. If we don't have a
8404 either a defined function descriptor or a defined entry symbol
8405 in a regular object file, then it is pointless trying to make
8406 any other type of stub. */
8407 if (!((fdh->elf.root.type == bfd_link_hash_defined
8408 || fdh->elf.root.type == bfd_link_hash_defweak)
8409 && fdh->elf.root.u.def.section->output_section != NULL)
8410 && !((h->elf.root.type == bfd_link_hash_defined
8411 || h->elf.root.type == bfd_link_hash_defweak)
8412 && h->elf.root.u.def.section->output_section != NULL))
8413 return ppc_stub_none;
8414 }
8415
8416 /* Determine where the call point is. */
8417 location = (input_sec->output_offset
8418 + input_sec->output_section->vma
8419 + rel->r_offset);
8420
8421 branch_offset = destination - location;
8422 r_type = ELF64_R_TYPE (rel->r_info);
8423
8424 /* Determine if a long branch stub is needed. */
8425 max_branch_offset = 1 << 25;
8426 if (r_type != R_PPC64_REL24)
8427 max_branch_offset = 1 << 15;
8428
8429 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8430 /* We need a stub. Figure out whether a long_branch or plt_branch
8431 is needed later. */
8432 return ppc_stub_long_branch;
8433
8434 return ppc_stub_none;
8435 }
8436
8437 /* Build a .plt call stub. */
8438
8439 static inline bfd_byte *
8440 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8441 {
8442 #define PPC_LO(v) ((v) & 0xffff)
8443 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8444 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8445
8446 if (PPC_HA (offset) != 0)
8447 {
8448 if (r != NULL)
8449 {
8450 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8451 r[1].r_offset = r[0].r_offset + 8;
8452 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8453 r[1].r_addend = r[0].r_addend;
8454 if (PPC_HA (offset + 16) != PPC_HA (offset))
8455 {
8456 r[2].r_offset = r[1].r_offset + 4;
8457 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8458 r[2].r_addend = r[0].r_addend;
8459 }
8460 else
8461 {
8462 r[2].r_offset = r[1].r_offset + 8;
8463 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8464 r[2].r_addend = r[0].r_addend + 8;
8465 r[3].r_offset = r[2].r_offset + 4;
8466 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8467 r[3].r_addend = r[0].r_addend + 16;
8468 }
8469 }
8470 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8471 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8472 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8473 if (PPC_HA (offset + 16) != PPC_HA (offset))
8474 {
8475 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8476 offset = 0;
8477 }
8478 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8479 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8480 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8481 bfd_put_32 (obfd, BCTR, p), p += 4;
8482 }
8483 else
8484 {
8485 if (r != NULL)
8486 {
8487 r[0].r_offset += 4;
8488 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8489 if (PPC_HA (offset + 16) != PPC_HA (offset))
8490 {
8491 r[1].r_offset = r[0].r_offset + 4;
8492 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8493 r[1].r_addend = r[0].r_addend;
8494 }
8495 else
8496 {
8497 r[1].r_offset = r[0].r_offset + 8;
8498 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8499 r[1].r_addend = r[0].r_addend + 16;
8500 r[2].r_offset = r[1].r_offset + 4;
8501 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8502 r[2].r_addend = r[0].r_addend + 8;
8503 }
8504 }
8505 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8506 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8507 if (PPC_HA (offset + 16) != PPC_HA (offset))
8508 {
8509 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8510 offset = 0;
8511 }
8512 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8513 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8514 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8515 bfd_put_32 (obfd, BCTR, p), p += 4;
8516 }
8517 return p;
8518 }
8519
8520 static Elf_Internal_Rela *
8521 get_relocs (asection *sec, int count)
8522 {
8523 Elf_Internal_Rela *relocs;
8524 struct bfd_elf_section_data *elfsec_data;
8525
8526 elfsec_data = elf_section_data (sec);
8527 relocs = elfsec_data->relocs;
8528 if (relocs == NULL)
8529 {
8530 bfd_size_type relsize;
8531 relsize = sec->reloc_count * sizeof (*relocs);
8532 relocs = bfd_alloc (sec->owner, relsize);
8533 if (relocs == NULL)
8534 return NULL;
8535 elfsec_data->relocs = relocs;
8536 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
8537 * sizeof (Elf64_External_Rela));
8538 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8539 sec->reloc_count = 0;
8540 }
8541 relocs += sec->reloc_count;
8542 sec->reloc_count += count;
8543 return relocs;
8544 }
8545
8546 static bfd_boolean
8547 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8548 {
8549 struct ppc_stub_hash_entry *stub_entry;
8550 struct ppc_branch_hash_entry *br_entry;
8551 struct bfd_link_info *info;
8552 struct ppc_link_hash_table *htab;
8553 bfd_byte *loc;
8554 bfd_byte *p;
8555 struct plt_entry *ent;
8556 bfd_vma dest, off;
8557 int size;
8558 Elf_Internal_Rela *r;
8559
8560 /* Massage our args to the form they really have. */
8561 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8562 info = in_arg;
8563
8564 htab = ppc_hash_table (info);
8565
8566 /* Make a note of the offset within the stubs for this entry. */
8567 stub_entry->stub_offset = stub_entry->stub_sec->size;
8568 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8569
8570 htab->stub_count[stub_entry->stub_type - 1] += 1;
8571 switch (stub_entry->stub_type)
8572 {
8573 case ppc_stub_long_branch:
8574 case ppc_stub_long_branch_r2off:
8575 /* Branches are relative. This is where we are going to. */
8576 off = dest = (stub_entry->target_value
8577 + stub_entry->target_section->output_offset
8578 + stub_entry->target_section->output_section->vma);
8579
8580 /* And this is where we are coming from. */
8581 off -= (stub_entry->stub_offset
8582 + stub_entry->stub_sec->output_offset
8583 + stub_entry->stub_sec->output_section->vma);
8584
8585 size = 4;
8586 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8587 {
8588 bfd_vma r2off;
8589
8590 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8591 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8592 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8593 loc += 4;
8594 size = 12;
8595 if (PPC_HA (r2off) != 0)
8596 {
8597 size = 16;
8598 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8599 loc += 4;
8600 }
8601 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8602 loc += 4;
8603 off -= size - 4;
8604 }
8605 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8606
8607 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8608 {
8609 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8610 stub_entry->root.string);
8611 htab->stub_error = TRUE;
8612 return FALSE;
8613 }
8614
8615 if (info->emitrelocations)
8616 {
8617 r = get_relocs (stub_entry->stub_sec, 1);
8618 if (r == NULL)
8619 return FALSE;
8620 r->r_offset = loc - stub_entry->stub_sec->contents;
8621 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8622 r->r_addend = dest;
8623 if (stub_entry->h != NULL)
8624 {
8625 struct elf_link_hash_entry **hashes;
8626 unsigned long symndx;
8627 struct ppc_link_hash_entry *h;
8628
8629 hashes = elf_sym_hashes (htab->stub_bfd);
8630 if (hashes == NULL)
8631 {
8632 bfd_size_type hsize;
8633
8634 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8635 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8636 if (hashes == NULL)
8637 return FALSE;
8638 elf_sym_hashes (htab->stub_bfd) = hashes;
8639 htab->stub_globals = 1;
8640 }
8641 symndx = htab->stub_globals++;
8642 h = stub_entry->h;
8643 hashes[symndx] = &h->elf;
8644 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8645 if (h->oh != NULL && h->oh->is_func)
8646 h = h->oh;
8647 if (h->elf.root.u.def.section != stub_entry->target_section)
8648 /* H is an opd symbol. The addend must be zero. */
8649 r->r_addend = 0;
8650 else
8651 {
8652 off = (h->elf.root.u.def.value
8653 + h->elf.root.u.def.section->output_offset
8654 + h->elf.root.u.def.section->output_section->vma);
8655 r->r_addend -= off;
8656 }
8657 }
8658 }
8659 break;
8660
8661 case ppc_stub_plt_branch:
8662 case ppc_stub_plt_branch_r2off:
8663 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8664 stub_entry->root.string + 9,
8665 FALSE, FALSE);
8666 if (br_entry == NULL)
8667 {
8668 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8669 stub_entry->root.string);
8670 htab->stub_error = TRUE;
8671 return FALSE;
8672 }
8673
8674 dest = (stub_entry->target_value
8675 + stub_entry->target_section->output_offset
8676 + stub_entry->target_section->output_section->vma);
8677
8678 bfd_put_64 (htab->brlt->owner, dest,
8679 htab->brlt->contents + br_entry->offset);
8680
8681 if (br_entry->iter == htab->stub_iteration)
8682 {
8683 br_entry->iter = 0;
8684
8685 if (htab->relbrlt != NULL)
8686 {
8687 /* Create a reloc for the branch lookup table entry. */
8688 Elf_Internal_Rela rela;
8689 bfd_byte *rl;
8690
8691 rela.r_offset = (br_entry->offset
8692 + htab->brlt->output_offset
8693 + htab->brlt->output_section->vma);
8694 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8695 rela.r_addend = dest;
8696
8697 rl = htab->relbrlt->contents;
8698 rl += (htab->relbrlt->reloc_count++
8699 * sizeof (Elf64_External_Rela));
8700 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8701 }
8702 else if (info->emitrelocations)
8703 {
8704 r = get_relocs (htab->brlt, 1);
8705 if (r == NULL)
8706 return FALSE;
8707 /* brlt, being SEC_LINKER_CREATED does not go through the
8708 normal reloc processing. Symbols and offsets are not
8709 translated from input file to output file form, so
8710 set up the offset per the output file. */
8711 r->r_offset = (br_entry->offset
8712 + htab->brlt->output_offset
8713 + htab->brlt->output_section->vma);
8714 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8715 r->r_addend = dest;
8716 }
8717 }
8718
8719 dest = (br_entry->offset
8720 + htab->brlt->output_offset
8721 + htab->brlt->output_section->vma);
8722
8723 off = (dest
8724 - elf_gp (htab->brlt->output_section->owner)
8725 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8726
8727 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8728 {
8729 (*_bfd_error_handler)
8730 (_("linkage table error against `%s'"),
8731 stub_entry->root.string);
8732 bfd_set_error (bfd_error_bad_value);
8733 htab->stub_error = TRUE;
8734 return FALSE;
8735 }
8736
8737 if (info->emitrelocations)
8738 {
8739 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
8740 if (r == NULL)
8741 return FALSE;
8742 r[0].r_offset = loc - stub_entry->stub_sec->contents;
8743 if (bfd_big_endian (info->output_bfd))
8744 r[0].r_offset += 2;
8745 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
8746 r[0].r_offset += 4;
8747 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8748 r[0].r_addend = dest;
8749 if (PPC_HA (off) != 0)
8750 {
8751 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8752 r[1].r_offset = r[0].r_offset + 4;
8753 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8754 r[1].r_addend = r[0].r_addend;
8755 }
8756 }
8757
8758 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8759 {
8760 if (PPC_HA (off) != 0)
8761 {
8762 size = 16;
8763 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
8764 loc += 4;
8765 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
8766 }
8767 else
8768 {
8769 size = 12;
8770 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
8771 }
8772 }
8773 else
8774 {
8775 bfd_vma r2off;
8776
8777 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8778 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8779 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8780 loc += 4;
8781 size = 20;
8782 if (PPC_HA (off) != 0)
8783 {
8784 size += 4;
8785 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
8786 loc += 4;
8787 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
8788 loc += 4;
8789 }
8790 else
8791 {
8792 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
8793 loc += 4;
8794 }
8795
8796 if (PPC_HA (r2off) != 0)
8797 {
8798 size += 4;
8799 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8800 loc += 4;
8801 }
8802 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8803 }
8804 loc += 4;
8805 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8806 loc += 4;
8807 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8808 break;
8809
8810 case ppc_stub_plt_call:
8811 /* Do the best we can for shared libraries built without
8812 exporting ".foo" for each "foo". This can happen when symbol
8813 versioning scripts strip all bar a subset of symbols. */
8814 if (stub_entry->h->oh != NULL
8815 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8816 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8817 {
8818 /* Point the symbol at the stub. There may be multiple stubs,
8819 we don't really care; The main thing is to make this sym
8820 defined somewhere. Maybe defining the symbol in the stub
8821 section is a silly idea. If we didn't do this, htab->top_id
8822 could disappear. */
8823 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8824 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8825 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8826 }
8827
8828 /* Now build the stub. */
8829 dest = (bfd_vma) -1;
8830 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8831 if (ent->addend == stub_entry->addend)
8832 {
8833 dest = ent->plt.offset;
8834 break;
8835 }
8836 if (dest >= (bfd_vma) -2)
8837 abort ();
8838
8839 dest &= ~ (bfd_vma) 1;
8840 dest += (htab->plt->output_offset
8841 + htab->plt->output_section->vma);
8842
8843 off = (dest
8844 - elf_gp (htab->plt->output_section->owner)
8845 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8846
8847 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8848 {
8849 (*_bfd_error_handler)
8850 (_("linkage table error against `%s'"),
8851 stub_entry->h->elf.root.root.string);
8852 bfd_set_error (bfd_error_bad_value);
8853 htab->stub_error = TRUE;
8854 return FALSE;
8855 }
8856
8857 r = NULL;
8858 if (info->emitrelocations)
8859 {
8860 r = get_relocs (stub_entry->stub_sec,
8861 (2 + (PPC_HA (off) != 0)
8862 + (PPC_HA (off + 16) == PPC_HA (off))));
8863 if (r == NULL)
8864 return FALSE;
8865 r[0].r_offset = loc - stub_entry->stub_sec->contents;
8866 if (bfd_big_endian (info->output_bfd))
8867 r[0].r_offset += 2;
8868 r[0].r_addend = dest;
8869 }
8870 p = build_plt_stub (htab->stub_bfd, loc, off, r);
8871 size = p - loc;
8872 break;
8873
8874 default:
8875 BFD_FAIL ();
8876 return FALSE;
8877 }
8878
8879 stub_entry->stub_sec->size += size;
8880
8881 if (htab->emit_stub_syms)
8882 {
8883 struct elf_link_hash_entry *h;
8884 size_t len1, len2;
8885 char *name;
8886 const char *const stub_str[] = { "long_branch",
8887 "long_branch_r2off",
8888 "plt_branch",
8889 "plt_branch_r2off",
8890 "plt_call" };
8891
8892 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8893 len2 = strlen (stub_entry->root.string);
8894 name = bfd_malloc (len1 + len2 + 2);
8895 if (name == NULL)
8896 return FALSE;
8897 memcpy (name, stub_entry->root.string, 9);
8898 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8899 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8900 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8901 if (h == NULL)
8902 return FALSE;
8903 if (h->root.type == bfd_link_hash_new)
8904 {
8905 h->root.type = bfd_link_hash_defined;
8906 h->root.u.def.section = stub_entry->stub_sec;
8907 h->root.u.def.value = stub_entry->stub_offset;
8908 h->ref_regular = 1;
8909 h->def_regular = 1;
8910 h->ref_regular_nonweak = 1;
8911 h->forced_local = 1;
8912 h->non_elf = 0;
8913 }
8914 }
8915
8916 return TRUE;
8917 }
8918
8919 /* As above, but don't actually build the stub. Just bump offset so
8920 we know stub section sizes, and select plt_branch stubs where
8921 long_branch stubs won't do. */
8922
8923 static bfd_boolean
8924 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8925 {
8926 struct ppc_stub_hash_entry *stub_entry;
8927 struct bfd_link_info *info;
8928 struct ppc_link_hash_table *htab;
8929 bfd_vma off;
8930 int size;
8931
8932 /* Massage our args to the form they really have. */
8933 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8934 info = in_arg;
8935
8936 htab = ppc_hash_table (info);
8937
8938 if (stub_entry->stub_type == ppc_stub_plt_call)
8939 {
8940 struct plt_entry *ent;
8941 off = (bfd_vma) -1;
8942 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8943 if (ent->addend == stub_entry->addend)
8944 {
8945 off = ent->plt.offset & ~(bfd_vma) 1;
8946 break;
8947 }
8948 if (off >= (bfd_vma) -2)
8949 abort ();
8950 off += (htab->plt->output_offset
8951 + htab->plt->output_section->vma
8952 - elf_gp (htab->plt->output_section->owner)
8953 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8954
8955 size = PLT_CALL_STUB_SIZE;
8956 if (PPC_HA (off) == 0)
8957 size -= 4;
8958 if (PPC_HA (off + 16) != PPC_HA (off))
8959 size += 4;
8960 if (info->emitrelocations)
8961 {
8962 stub_entry->stub_sec->reloc_count
8963 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
8964 stub_entry->stub_sec->flags |= SEC_RELOC;
8965 }
8966 }
8967 else
8968 {
8969 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8970 variants. */
8971 bfd_vma r2off = 0;
8972
8973 off = (stub_entry->target_value
8974 + stub_entry->target_section->output_offset
8975 + stub_entry->target_section->output_section->vma);
8976 off -= (stub_entry->stub_sec->size
8977 + stub_entry->stub_sec->output_offset
8978 + stub_entry->stub_sec->output_section->vma);
8979
8980 /* Reset the stub type from the plt variant in case we now
8981 can reach with a shorter stub. */
8982 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8983 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8984
8985 size = 4;
8986 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8987 {
8988 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8989 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8990 size = 12;
8991 if (PPC_HA (r2off) != 0)
8992 size = 16;
8993 off -= size - 4;
8994 }
8995
8996 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8997 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8998 {
8999 struct ppc_branch_hash_entry *br_entry;
9000
9001 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9002 stub_entry->root.string + 9,
9003 TRUE, FALSE);
9004 if (br_entry == NULL)
9005 {
9006 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
9007 stub_entry->root.string);
9008 htab->stub_error = TRUE;
9009 return FALSE;
9010 }
9011
9012 if (br_entry->iter != htab->stub_iteration)
9013 {
9014 br_entry->iter = htab->stub_iteration;
9015 br_entry->offset = htab->brlt->size;
9016 htab->brlt->size += 8;
9017
9018 if (htab->relbrlt != NULL)
9019 htab->relbrlt->size += sizeof (Elf64_External_Rela);
9020 else if (info->emitrelocations)
9021 {
9022 htab->brlt->reloc_count += 1;
9023 htab->brlt->flags |= SEC_RELOC;
9024 }
9025 }
9026
9027 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
9028 off = (br_entry->offset
9029 + htab->brlt->output_offset
9030 + htab->brlt->output_section->vma
9031 - elf_gp (htab->brlt->output_section->owner)
9032 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9033
9034 if (info->emitrelocations)
9035 {
9036 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9037 stub_entry->stub_sec->flags |= SEC_RELOC;
9038 }
9039
9040 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9041 {
9042 size = 12;
9043 if (PPC_HA (off) != 0)
9044 size = 16;
9045 }
9046 else
9047 {
9048 size = 20;
9049 if (PPC_HA (off) != 0)
9050 size += 4;
9051
9052 if (PPC_HA (r2off) != 0)
9053 size += 4;
9054 }
9055 }
9056 else if (info->emitrelocations)
9057 {
9058 stub_entry->stub_sec->reloc_count += 1;
9059 stub_entry->stub_sec->flags |= SEC_RELOC;
9060 }
9061 }
9062
9063 stub_entry->stub_sec->size += size;
9064 return TRUE;
9065 }
9066
9067 /* Set up various things so that we can make a list of input sections
9068 for each output section included in the link. Returns -1 on error,
9069 0 when no stubs will be needed, and 1 on success. */
9070
9071 int
9072 ppc64_elf_setup_section_lists (bfd *output_bfd,
9073 struct bfd_link_info *info,
9074 int no_multi_toc)
9075 {
9076 bfd *input_bfd;
9077 int top_id, top_index, id;
9078 asection *section;
9079 asection **input_list;
9080 bfd_size_type amt;
9081 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9082
9083 htab->no_multi_toc = no_multi_toc;
9084
9085 if (htab->brlt == NULL)
9086 return 0;
9087
9088 /* Find the top input section id. */
9089 for (input_bfd = info->input_bfds, top_id = 3;
9090 input_bfd != NULL;
9091 input_bfd = input_bfd->link_next)
9092 {
9093 for (section = input_bfd->sections;
9094 section != NULL;
9095 section = section->next)
9096 {
9097 if (top_id < section->id)
9098 top_id = section->id;
9099 }
9100 }
9101
9102 htab->top_id = top_id;
9103 amt = sizeof (struct map_stub) * (top_id + 1);
9104 htab->stub_group = bfd_zmalloc (amt);
9105 if (htab->stub_group == NULL)
9106 return -1;
9107
9108 /* Set toc_off for com, und, abs and ind sections. */
9109 for (id = 0; id < 3; id++)
9110 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9111
9112 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9113
9114 /* We can't use output_bfd->section_count here to find the top output
9115 section index as some sections may have been removed, and
9116 strip_excluded_output_sections doesn't renumber the indices. */
9117 for (section = output_bfd->sections, top_index = 0;
9118 section != NULL;
9119 section = section->next)
9120 {
9121 if (top_index < section->index)
9122 top_index = section->index;
9123 }
9124
9125 htab->top_index = top_index;
9126 amt = sizeof (asection *) * (top_index + 1);
9127 input_list = bfd_zmalloc (amt);
9128 htab->input_list = input_list;
9129 if (input_list == NULL)
9130 return -1;
9131
9132 return 1;
9133 }
9134
9135 /* The linker repeatedly calls this function for each TOC input section
9136 and linker generated GOT section. Group input bfds such that the toc
9137 within a group is less than 64k in size. Will break with cute linker
9138 scripts that play games with dot in the output toc section. */
9139
9140 void
9141 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9142 {
9143 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9144
9145 if (!htab->no_multi_toc)
9146 {
9147 bfd_vma addr = isec->output_offset + isec->output_section->vma;
9148 bfd_vma off = addr - htab->toc_curr;
9149
9150 if (off + isec->size > 0x10000)
9151 htab->toc_curr = addr;
9152
9153 elf_gp (isec->owner) = (htab->toc_curr
9154 - elf_gp (isec->output_section->owner)
9155 + TOC_BASE_OFF);
9156 }
9157 }
9158
9159 /* Called after the last call to the above function. */
9160
9161 void
9162 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9163 {
9164 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9165
9166 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9167
9168 /* toc_curr tracks the TOC offset used for code sections below in
9169 ppc64_elf_next_input_section. Start off at 0x8000. */
9170 htab->toc_curr = TOC_BASE_OFF;
9171 }
9172
9173 /* No toc references were found in ISEC. If the code in ISEC makes no
9174 calls, then there's no need to use toc adjusting stubs when branching
9175 into ISEC. Actually, indirect calls from ISEC are OK as they will
9176 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9177 needed, and 2 if a cyclical call-graph was found but no other reason
9178 for a stub was detected. If called from the top level, a return of
9179 2 means the same as a return of 0. */
9180
9181 static int
9182 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9183 {
9184 Elf_Internal_Rela *relstart, *rel;
9185 Elf_Internal_Sym *local_syms;
9186 int ret;
9187 struct ppc_link_hash_table *htab;
9188
9189 /* We know none of our code bearing sections will need toc stubs. */
9190 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9191 return 0;
9192
9193 if (isec->size == 0)
9194 return 0;
9195
9196 if (isec->output_section == NULL)
9197 return 0;
9198
9199 if (isec->reloc_count == 0)
9200 return 0;
9201
9202 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9203 info->keep_memory);
9204 if (relstart == NULL)
9205 return -1;
9206
9207 /* Look for branches to outside of this section. */
9208 local_syms = NULL;
9209 ret = 0;
9210 htab = ppc_hash_table (info);
9211 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9212 {
9213 enum elf_ppc64_reloc_type r_type;
9214 unsigned long r_symndx;
9215 struct elf_link_hash_entry *h;
9216 struct ppc_link_hash_entry *eh;
9217 Elf_Internal_Sym *sym;
9218 asection *sym_sec;
9219 struct _opd_sec_data *opd;
9220 bfd_vma sym_value;
9221 bfd_vma dest;
9222
9223 r_type = ELF64_R_TYPE (rel->r_info);
9224 if (r_type != R_PPC64_REL24
9225 && r_type != R_PPC64_REL14
9226 && r_type != R_PPC64_REL14_BRTAKEN
9227 && r_type != R_PPC64_REL14_BRNTAKEN)
9228 continue;
9229
9230 r_symndx = ELF64_R_SYM (rel->r_info);
9231 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9232 isec->owner))
9233 {
9234 ret = -1;
9235 break;
9236 }
9237
9238 /* Calls to dynamic lib functions go through a plt call stub
9239 that uses r2. */
9240 eh = (struct ppc_link_hash_entry *) h;
9241 if (eh != NULL
9242 && (eh->elf.plt.plist != NULL
9243 || (eh->oh != NULL
9244 && eh->oh->elf.plt.plist != NULL)))
9245 {
9246 ret = 1;
9247 break;
9248 }
9249
9250 if (sym_sec == NULL)
9251 /* Ignore other undefined symbols. */
9252 continue;
9253
9254 /* Assume branches to other sections not included in the link need
9255 stubs too, to cover -R and absolute syms. */
9256 if (sym_sec->output_section == NULL)
9257 {
9258 ret = 1;
9259 break;
9260 }
9261
9262 if (h == NULL)
9263 sym_value = sym->st_value;
9264 else
9265 {
9266 if (h->root.type != bfd_link_hash_defined
9267 && h->root.type != bfd_link_hash_defweak)
9268 abort ();
9269 sym_value = h->root.u.def.value;
9270 }
9271 sym_value += rel->r_addend;
9272
9273 /* If this branch reloc uses an opd sym, find the code section. */
9274 opd = get_opd_info (sym_sec);
9275 if (opd != NULL)
9276 {
9277 if (h == NULL && opd->adjust != NULL)
9278 {
9279 long adjust;
9280
9281 adjust = opd->adjust[sym->st_value / 8];
9282 if (adjust == -1)
9283 /* Assume deleted functions won't ever be called. */
9284 continue;
9285 sym_value += adjust;
9286 }
9287
9288 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9289 if (dest == (bfd_vma) -1)
9290 continue;
9291 }
9292 else
9293 dest = (sym_value
9294 + sym_sec->output_offset
9295 + sym_sec->output_section->vma);
9296
9297 /* Ignore branch to self. */
9298 if (sym_sec == isec)
9299 continue;
9300
9301 /* If the called function uses the toc, we need a stub. */
9302 if (sym_sec->has_toc_reloc
9303 || sym_sec->makes_toc_func_call)
9304 {
9305 ret = 1;
9306 break;
9307 }
9308
9309 /* Assume any branch that needs a long branch stub might in fact
9310 need a plt_branch stub. A plt_branch stub uses r2. */
9311 else if (dest - (isec->output_offset
9312 + isec->output_section->vma
9313 + rel->r_offset) + (1 << 25) >= (2 << 25))
9314 {
9315 ret = 1;
9316 break;
9317 }
9318
9319 /* If calling back to a section in the process of being tested, we
9320 can't say for sure that no toc adjusting stubs are needed, so
9321 don't return zero. */
9322 else if (sym_sec->call_check_in_progress)
9323 ret = 2;
9324
9325 /* Branches to another section that itself doesn't have any TOC
9326 references are OK. Recursively call ourselves to check. */
9327 else if (sym_sec->id <= htab->top_id
9328 && htab->stub_group[sym_sec->id].toc_off == 0)
9329 {
9330 int recur;
9331
9332 /* Mark current section as indeterminate, so that other
9333 sections that call back to current won't be marked as
9334 known. */
9335 isec->call_check_in_progress = 1;
9336 recur = toc_adjusting_stub_needed (info, sym_sec);
9337 isec->call_check_in_progress = 0;
9338
9339 if (recur < 0)
9340 {
9341 /* An error. Exit. */
9342 ret = -1;
9343 break;
9344 }
9345 else if (recur <= 1)
9346 {
9347 /* Known result. Mark as checked and set section flag. */
9348 htab->stub_group[sym_sec->id].toc_off = 1;
9349 if (recur != 0)
9350 {
9351 sym_sec->makes_toc_func_call = 1;
9352 ret = 1;
9353 break;
9354 }
9355 }
9356 else
9357 {
9358 /* Unknown result. Continue checking. */
9359 ret = 2;
9360 }
9361 }
9362 }
9363
9364 if (local_syms != NULL
9365 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9366 free (local_syms);
9367 if (elf_section_data (isec)->relocs != relstart)
9368 free (relstart);
9369
9370 return ret;
9371 }
9372
9373 /* The linker repeatedly calls this function for each input section,
9374 in the order that input sections are linked into output sections.
9375 Build lists of input sections to determine groupings between which
9376 we may insert linker stubs. */
9377
9378 bfd_boolean
9379 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9380 {
9381 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9382
9383 if ((isec->output_section->flags & SEC_CODE) != 0
9384 && isec->output_section->index <= htab->top_index)
9385 {
9386 asection **list = htab->input_list + isec->output_section->index;
9387 /* Steal the link_sec pointer for our list. */
9388 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9389 /* This happens to make the list in reverse order,
9390 which is what we want. */
9391 PREV_SEC (isec) = *list;
9392 *list = isec;
9393 }
9394
9395 if (htab->multi_toc_needed)
9396 {
9397 /* If a code section has a function that uses the TOC then we need
9398 to use the right TOC (obviously). Also, make sure that .opd gets
9399 the correct TOC value for R_PPC64_TOC relocs that don't have or
9400 can't find their function symbol (shouldn't ever happen now).
9401 Also specially treat .fixup for the linux kernel. .fixup
9402 contains branches, but only back to the function that hit an
9403 exception. */
9404 if (isec->has_toc_reloc
9405 || (isec->flags & SEC_CODE) == 0
9406 || strcmp (isec->name, ".fixup") == 0)
9407 {
9408 if (elf_gp (isec->owner) != 0)
9409 htab->toc_curr = elf_gp (isec->owner);
9410 }
9411 else if (htab->stub_group[isec->id].toc_off == 0)
9412 {
9413 int ret = toc_adjusting_stub_needed (info, isec);
9414 if (ret < 0)
9415 return FALSE;
9416 else
9417 isec->makes_toc_func_call = ret & 1;
9418 }
9419 }
9420
9421 /* Functions that don't use the TOC can belong in any TOC group.
9422 Use the last TOC base. This happens to make _init and _fini
9423 pasting work. */
9424 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9425 return TRUE;
9426 }
9427
9428 /* See whether we can group stub sections together. Grouping stub
9429 sections may result in fewer stubs. More importantly, we need to
9430 put all .init* and .fini* stubs at the beginning of the .init or
9431 .fini output sections respectively, because glibc splits the
9432 _init and _fini functions into multiple parts. Putting a stub in
9433 the middle of a function is not a good idea. */
9434
9435 static void
9436 group_sections (struct ppc_link_hash_table *htab,
9437 bfd_size_type stub_group_size,
9438 bfd_boolean stubs_always_before_branch)
9439 {
9440 asection **list;
9441 bfd_size_type stub14_group_size;
9442 bfd_boolean suppress_size_errors;
9443
9444 suppress_size_errors = FALSE;
9445 stub14_group_size = stub_group_size;
9446 if (stub_group_size == 1)
9447 {
9448 /* Default values. */
9449 if (stubs_always_before_branch)
9450 {
9451 stub_group_size = 0x1e00000;
9452 stub14_group_size = 0x7800;
9453 }
9454 else
9455 {
9456 stub_group_size = 0x1c00000;
9457 stub14_group_size = 0x7000;
9458 }
9459 suppress_size_errors = TRUE;
9460 }
9461
9462 list = htab->input_list + htab->top_index;
9463 do
9464 {
9465 asection *tail = *list;
9466 while (tail != NULL)
9467 {
9468 asection *curr;
9469 asection *prev;
9470 bfd_size_type total;
9471 bfd_boolean big_sec;
9472 bfd_vma curr_toc;
9473
9474 curr = tail;
9475 total = tail->size;
9476 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9477 ? stub14_group_size : stub_group_size);
9478 if (big_sec && !suppress_size_errors)
9479 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9480 tail->owner, tail);
9481 curr_toc = htab->stub_group[tail->id].toc_off;
9482
9483 while ((prev = PREV_SEC (curr)) != NULL
9484 && ((total += curr->output_offset - prev->output_offset)
9485 < (ppc64_elf_section_data (prev)->has_14bit_branch
9486 ? stub14_group_size : stub_group_size))
9487 && htab->stub_group[prev->id].toc_off == curr_toc)
9488 curr = prev;
9489
9490 /* OK, the size from the start of CURR to the end is less
9491 than stub_group_size and thus can be handled by one stub
9492 section. (or the tail section is itself larger than
9493 stub_group_size, in which case we may be toast.) We
9494 should really be keeping track of the total size of stubs
9495 added here, as stubs contribute to the final output
9496 section size. That's a little tricky, and this way will
9497 only break if stubs added make the total size more than
9498 2^25, ie. for the default stub_group_size, if stubs total
9499 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9500 do
9501 {
9502 prev = PREV_SEC (tail);
9503 /* Set up this stub group. */
9504 htab->stub_group[tail->id].link_sec = curr;
9505 }
9506 while (tail != curr && (tail = prev) != NULL);
9507
9508 /* But wait, there's more! Input sections up to stub_group_size
9509 bytes before the stub section can be handled by it too.
9510 Don't do this if we have a really large section after the
9511 stubs, as adding more stubs increases the chance that
9512 branches may not reach into the stub section. */
9513 if (!stubs_always_before_branch && !big_sec)
9514 {
9515 total = 0;
9516 while (prev != NULL
9517 && ((total += tail->output_offset - prev->output_offset)
9518 < (ppc64_elf_section_data (prev)->has_14bit_branch
9519 ? stub14_group_size : stub_group_size))
9520 && htab->stub_group[prev->id].toc_off == curr_toc)
9521 {
9522 tail = prev;
9523 prev = PREV_SEC (tail);
9524 htab->stub_group[tail->id].link_sec = curr;
9525 }
9526 }
9527 tail = prev;
9528 }
9529 }
9530 while (list-- != htab->input_list);
9531 free (htab->input_list);
9532 #undef PREV_SEC
9533 }
9534
9535 /* Determine and set the size of the stub section for a final link.
9536
9537 The basic idea here is to examine all the relocations looking for
9538 PC-relative calls to a target that is unreachable with a "bl"
9539 instruction. */
9540
9541 bfd_boolean
9542 ppc64_elf_size_stubs (bfd *output_bfd,
9543 struct bfd_link_info *info,
9544 bfd_signed_vma group_size,
9545 asection *(*add_stub_section) (const char *, asection *),
9546 void (*layout_sections_again) (void))
9547 {
9548 bfd_size_type stub_group_size;
9549 bfd_boolean stubs_always_before_branch;
9550 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9551
9552 /* Stash our params away. */
9553 htab->add_stub_section = add_stub_section;
9554 htab->layout_sections_again = layout_sections_again;
9555 stubs_always_before_branch = group_size < 0;
9556 if (group_size < 0)
9557 stub_group_size = -group_size;
9558 else
9559 stub_group_size = group_size;
9560
9561 group_sections (htab, stub_group_size, stubs_always_before_branch);
9562
9563 while (1)
9564 {
9565 bfd *input_bfd;
9566 unsigned int bfd_indx;
9567 asection *stub_sec;
9568
9569 htab->stub_iteration += 1;
9570
9571 for (input_bfd = info->input_bfds, bfd_indx = 0;
9572 input_bfd != NULL;
9573 input_bfd = input_bfd->link_next, bfd_indx++)
9574 {
9575 Elf_Internal_Shdr *symtab_hdr;
9576 asection *section;
9577 Elf_Internal_Sym *local_syms = NULL;
9578
9579 if (!is_ppc64_elf (input_bfd))
9580 continue;
9581
9582 /* We'll need the symbol table in a second. */
9583 symtab_hdr = &elf_symtab_hdr (input_bfd);
9584 if (symtab_hdr->sh_info == 0)
9585 continue;
9586
9587 /* Walk over each section attached to the input bfd. */
9588 for (section = input_bfd->sections;
9589 section != NULL;
9590 section = section->next)
9591 {
9592 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9593
9594 /* If there aren't any relocs, then there's nothing more
9595 to do. */
9596 if ((section->flags & SEC_RELOC) == 0
9597 || (section->flags & SEC_ALLOC) == 0
9598 || (section->flags & SEC_LOAD) == 0
9599 || (section->flags & SEC_CODE) == 0
9600 || section->reloc_count == 0)
9601 continue;
9602
9603 /* If this section is a link-once section that will be
9604 discarded, then don't create any stubs. */
9605 if (section->output_section == NULL
9606 || section->output_section->owner != output_bfd)
9607 continue;
9608
9609 /* Get the relocs. */
9610 internal_relocs
9611 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9612 info->keep_memory);
9613 if (internal_relocs == NULL)
9614 goto error_ret_free_local;
9615
9616 /* Now examine each relocation. */
9617 irela = internal_relocs;
9618 irelaend = irela + section->reloc_count;
9619 for (; irela < irelaend; irela++)
9620 {
9621 enum elf_ppc64_reloc_type r_type;
9622 unsigned int r_indx;
9623 enum ppc_stub_type stub_type;
9624 struct ppc_stub_hash_entry *stub_entry;
9625 asection *sym_sec, *code_sec;
9626 bfd_vma sym_value;
9627 bfd_vma destination;
9628 bfd_boolean ok_dest;
9629 struct ppc_link_hash_entry *hash;
9630 struct ppc_link_hash_entry *fdh;
9631 struct elf_link_hash_entry *h;
9632 Elf_Internal_Sym *sym;
9633 char *stub_name;
9634 const asection *id_sec;
9635 struct _opd_sec_data *opd;
9636
9637 r_type = ELF64_R_TYPE (irela->r_info);
9638 r_indx = ELF64_R_SYM (irela->r_info);
9639
9640 if (r_type >= R_PPC64_max)
9641 {
9642 bfd_set_error (bfd_error_bad_value);
9643 goto error_ret_free_internal;
9644 }
9645
9646 /* Only look for stubs on branch instructions. */
9647 if (r_type != R_PPC64_REL24
9648 && r_type != R_PPC64_REL14
9649 && r_type != R_PPC64_REL14_BRTAKEN
9650 && r_type != R_PPC64_REL14_BRNTAKEN)
9651 continue;
9652
9653 /* Now determine the call target, its name, value,
9654 section. */
9655 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9656 r_indx, input_bfd))
9657 goto error_ret_free_internal;
9658 hash = (struct ppc_link_hash_entry *) h;
9659
9660 ok_dest = FALSE;
9661 fdh = NULL;
9662 sym_value = 0;
9663 if (hash == NULL)
9664 {
9665 sym_value = sym->st_value;
9666 ok_dest = TRUE;
9667 }
9668 else if (hash->elf.root.type == bfd_link_hash_defined
9669 || hash->elf.root.type == bfd_link_hash_defweak)
9670 {
9671 sym_value = hash->elf.root.u.def.value;
9672 if (sym_sec->output_section != NULL)
9673 ok_dest = TRUE;
9674 }
9675 else if (hash->elf.root.type == bfd_link_hash_undefweak
9676 || hash->elf.root.type == bfd_link_hash_undefined)
9677 {
9678 /* Recognise an old ABI func code entry sym, and
9679 use the func descriptor sym instead if it is
9680 defined. */
9681 if (hash->elf.root.root.string[0] == '.'
9682 && (fdh = get_fdh (hash, htab)) != NULL)
9683 {
9684 if (fdh->elf.root.type == bfd_link_hash_defined
9685 || fdh->elf.root.type == bfd_link_hash_defweak)
9686 {
9687 sym_sec = fdh->elf.root.u.def.section;
9688 sym_value = fdh->elf.root.u.def.value;
9689 if (sym_sec->output_section != NULL)
9690 ok_dest = TRUE;
9691 }
9692 else
9693 fdh = NULL;
9694 }
9695 }
9696 else
9697 {
9698 bfd_set_error (bfd_error_bad_value);
9699 goto error_ret_free_internal;
9700 }
9701
9702 destination = 0;
9703 if (ok_dest)
9704 {
9705 sym_value += irela->r_addend;
9706 destination = (sym_value
9707 + sym_sec->output_offset
9708 + sym_sec->output_section->vma);
9709 }
9710
9711 code_sec = sym_sec;
9712 opd = get_opd_info (sym_sec);
9713 if (opd != NULL)
9714 {
9715 bfd_vma dest;
9716
9717 if (hash == NULL && opd->adjust != NULL)
9718 {
9719 long adjust = opd->adjust[sym_value / 8];
9720 if (adjust == -1)
9721 continue;
9722 sym_value += adjust;
9723 }
9724 dest = opd_entry_value (sym_sec, sym_value,
9725 &code_sec, &sym_value);
9726 if (dest != (bfd_vma) -1)
9727 {
9728 destination = dest;
9729 if (fdh != NULL)
9730 {
9731 /* Fixup old ABI sym to point at code
9732 entry. */
9733 hash->elf.root.type = bfd_link_hash_defweak;
9734 hash->elf.root.u.def.section = code_sec;
9735 hash->elf.root.u.def.value = sym_value;
9736 }
9737 }
9738 }
9739
9740 /* Determine what (if any) linker stub is needed. */
9741 stub_type = ppc_type_of_stub (section, irela, &hash,
9742 destination);
9743
9744 if (stub_type != ppc_stub_plt_call)
9745 {
9746 /* Check whether we need a TOC adjusting stub.
9747 Since the linker pastes together pieces from
9748 different object files when creating the
9749 _init and _fini functions, it may be that a
9750 call to what looks like a local sym is in
9751 fact a call needing a TOC adjustment. */
9752 if (code_sec != NULL
9753 && code_sec->output_section != NULL
9754 && (htab->stub_group[code_sec->id].toc_off
9755 != htab->stub_group[section->id].toc_off)
9756 && (code_sec->has_toc_reloc
9757 || code_sec->makes_toc_func_call))
9758 stub_type = ppc_stub_long_branch_r2off;
9759 }
9760
9761 if (stub_type == ppc_stub_none)
9762 continue;
9763
9764 /* __tls_get_addr calls might be eliminated. */
9765 if (stub_type != ppc_stub_plt_call
9766 && hash != NULL
9767 && (hash == htab->tls_get_addr
9768 || hash == htab->tls_get_addr_fd)
9769 && section->has_tls_reloc
9770 && irela != internal_relocs)
9771 {
9772 /* Get tls info. */
9773 char *tls_mask;
9774
9775 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
9776 irela - 1, input_bfd))
9777 goto error_ret_free_internal;
9778 if (*tls_mask != 0)
9779 continue;
9780 }
9781
9782 /* Support for grouping stub sections. */
9783 id_sec = htab->stub_group[section->id].link_sec;
9784
9785 /* Get the name of this stub. */
9786 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9787 if (!stub_name)
9788 goto error_ret_free_internal;
9789
9790 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9791 stub_name, FALSE, FALSE);
9792 if (stub_entry != NULL)
9793 {
9794 /* The proper stub has already been created. */
9795 free (stub_name);
9796 continue;
9797 }
9798
9799 stub_entry = ppc_add_stub (stub_name, section, htab);
9800 if (stub_entry == NULL)
9801 {
9802 free (stub_name);
9803 error_ret_free_internal:
9804 if (elf_section_data (section)->relocs == NULL)
9805 free (internal_relocs);
9806 error_ret_free_local:
9807 if (local_syms != NULL
9808 && (symtab_hdr->contents
9809 != (unsigned char *) local_syms))
9810 free (local_syms);
9811 return FALSE;
9812 }
9813
9814 stub_entry->stub_type = stub_type;
9815 stub_entry->target_value = sym_value;
9816 stub_entry->target_section = code_sec;
9817 stub_entry->h = hash;
9818 stub_entry->addend = irela->r_addend;
9819
9820 if (stub_entry->h != NULL)
9821 htab->stub_globals += 1;
9822 }
9823
9824 /* We're done with the internal relocs, free them. */
9825 if (elf_section_data (section)->relocs != internal_relocs)
9826 free (internal_relocs);
9827 }
9828
9829 if (local_syms != NULL
9830 && symtab_hdr->contents != (unsigned char *) local_syms)
9831 {
9832 if (!info->keep_memory)
9833 free (local_syms);
9834 else
9835 symtab_hdr->contents = (unsigned char *) local_syms;
9836 }
9837 }
9838
9839 /* We may have added some stubs. Find out the new size of the
9840 stub sections. */
9841 for (stub_sec = htab->stub_bfd->sections;
9842 stub_sec != NULL;
9843 stub_sec = stub_sec->next)
9844 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9845 {
9846 stub_sec->rawsize = stub_sec->size;
9847 stub_sec->size = 0;
9848 stub_sec->reloc_count = 0;
9849 stub_sec->flags &= ~SEC_RELOC;
9850 }
9851
9852 htab->brlt->size = 0;
9853 htab->brlt->reloc_count = 0;
9854 htab->brlt->flags &= ~SEC_RELOC;
9855 if (htab->relbrlt != NULL)
9856 htab->relbrlt->size = 0;
9857
9858 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9859
9860 if (info->emitrelocations
9861 && htab->glink != NULL && htab->glink->size != 0)
9862 {
9863 htab->glink->reloc_count = 1;
9864 htab->glink->flags |= SEC_RELOC;
9865 }
9866
9867 for (stub_sec = htab->stub_bfd->sections;
9868 stub_sec != NULL;
9869 stub_sec = stub_sec->next)
9870 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9871 && stub_sec->rawsize != stub_sec->size)
9872 break;
9873
9874 /* Exit from this loop when no stubs have been added, and no stubs
9875 have changed size. */
9876 if (stub_sec == NULL)
9877 break;
9878
9879 /* Ask the linker to do its stuff. */
9880 (*htab->layout_sections_again) ();
9881 }
9882
9883 /* It would be nice to strip htab->brlt from the output if the
9884 section is empty, but it's too late. If we strip sections here,
9885 the dynamic symbol table is corrupted since the section symbol
9886 for the stripped section isn't written. */
9887
9888 return TRUE;
9889 }
9890
9891 /* Called after we have determined section placement. If sections
9892 move, we'll be called again. Provide a value for TOCstart. */
9893
9894 bfd_vma
9895 ppc64_elf_toc (bfd *obfd)
9896 {
9897 asection *s;
9898 bfd_vma TOCstart;
9899
9900 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9901 order. The TOC starts where the first of these sections starts. */
9902 s = bfd_get_section_by_name (obfd, ".got");
9903 if (s == NULL)
9904 s = bfd_get_section_by_name (obfd, ".toc");
9905 if (s == NULL)
9906 s = bfd_get_section_by_name (obfd, ".tocbss");
9907 if (s == NULL)
9908 s = bfd_get_section_by_name (obfd, ".plt");
9909 if (s == NULL)
9910 {
9911 /* This may happen for
9912 o references to TOC base (SYM@toc / TOC[tc0]) without a
9913 .toc directive
9914 o bad linker script
9915 o --gc-sections and empty TOC sections
9916
9917 FIXME: Warn user? */
9918
9919 /* Look for a likely section. We probably won't even be
9920 using TOCstart. */
9921 for (s = obfd->sections; s != NULL; s = s->next)
9922 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9923 == (SEC_ALLOC | SEC_SMALL_DATA))
9924 break;
9925 if (s == NULL)
9926 for (s = obfd->sections; s != NULL; s = s->next)
9927 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9928 == (SEC_ALLOC | SEC_SMALL_DATA))
9929 break;
9930 if (s == NULL)
9931 for (s = obfd->sections; s != NULL; s = s->next)
9932 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9933 break;
9934 if (s == NULL)
9935 for (s = obfd->sections; s != NULL; s = s->next)
9936 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9937 break;
9938 }
9939
9940 TOCstart = 0;
9941 if (s != NULL)
9942 TOCstart = s->output_section->vma + s->output_offset;
9943
9944 return TOCstart;
9945 }
9946
9947 /* Build all the stubs associated with the current output file.
9948 The stubs are kept in a hash table attached to the main linker
9949 hash table. This function is called via gldelf64ppc_finish. */
9950
9951 bfd_boolean
9952 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9953 struct bfd_link_info *info,
9954 char **stats)
9955 {
9956 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9957 asection *stub_sec;
9958 bfd_byte *p;
9959 int stub_sec_count = 0;
9960
9961 htab->emit_stub_syms = emit_stub_syms;
9962
9963 /* Allocate memory to hold the linker stubs. */
9964 for (stub_sec = htab->stub_bfd->sections;
9965 stub_sec != NULL;
9966 stub_sec = stub_sec->next)
9967 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9968 && stub_sec->size != 0)
9969 {
9970 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9971 if (stub_sec->contents == NULL)
9972 return FALSE;
9973 /* We want to check that built size is the same as calculated
9974 size. rawsize is a convenient location to use. */
9975 stub_sec->rawsize = stub_sec->size;
9976 stub_sec->size = 0;
9977 }
9978
9979 if (htab->glink != NULL && htab->glink->size != 0)
9980 {
9981 unsigned int indx;
9982 bfd_vma plt0;
9983
9984 /* Build the .glink plt call stub. */
9985 if (htab->emit_stub_syms)
9986 {
9987 struct elf_link_hash_entry *h;
9988 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
9989 TRUE, FALSE, FALSE);
9990 if (h == NULL)
9991 return FALSE;
9992 if (h->root.type == bfd_link_hash_new)
9993 {
9994 h->root.type = bfd_link_hash_defined;
9995 h->root.u.def.section = htab->glink;
9996 h->root.u.def.value = 8;
9997 h->ref_regular = 1;
9998 h->def_regular = 1;
9999 h->ref_regular_nonweak = 1;
10000 h->forced_local = 1;
10001 h->non_elf = 0;
10002 }
10003 }
10004 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
10005 if (info->emitrelocations)
10006 {
10007 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
10008 if (r == NULL)
10009 return FALSE;
10010 r->r_offset = (htab->glink->output_offset
10011 + htab->glink->output_section->vma);
10012 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
10013 r->r_addend = plt0;
10014 }
10015 p = htab->glink->contents;
10016 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
10017 bfd_put_64 (htab->glink->owner, plt0, p);
10018 p += 8;
10019 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
10020 p += 4;
10021 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
10022 p += 4;
10023 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
10024 p += 4;
10025 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
10026 p += 4;
10027 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
10028 p += 4;
10029 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10030 p += 4;
10031 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10032 p += 4;
10033 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10034 p += 4;
10035 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10036 p += 4;
10037 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10038 p += 4;
10039 bfd_put_32 (htab->glink->owner, BCTR, p);
10040 p += 4;
10041 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10042 {
10043 bfd_put_32 (htab->glink->owner, NOP, p);
10044 p += 4;
10045 }
10046
10047 /* Build the .glink lazy link call stubs. */
10048 indx = 0;
10049 while (p < htab->glink->contents + htab->glink->size)
10050 {
10051 if (indx < 0x8000)
10052 {
10053 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10054 p += 4;
10055 }
10056 else
10057 {
10058 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10059 p += 4;
10060 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10061 p += 4;
10062 }
10063 bfd_put_32 (htab->glink->owner,
10064 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10065 indx++;
10066 p += 4;
10067 }
10068 htab->glink->rawsize = p - htab->glink->contents;
10069 }
10070
10071 if (htab->brlt->size != 0)
10072 {
10073 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10074 htab->brlt->size);
10075 if (htab->brlt->contents == NULL)
10076 return FALSE;
10077 }
10078 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10079 {
10080 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10081 htab->relbrlt->size);
10082 if (htab->relbrlt->contents == NULL)
10083 return FALSE;
10084 }
10085
10086 /* Build the stubs as directed by the stub hash table. */
10087 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10088
10089 if (htab->relbrlt != NULL)
10090 htab->relbrlt->reloc_count = 0;
10091
10092 for (stub_sec = htab->stub_bfd->sections;
10093 stub_sec != NULL;
10094 stub_sec = stub_sec->next)
10095 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10096 {
10097 stub_sec_count += 1;
10098 if (stub_sec->rawsize != stub_sec->size)
10099 break;
10100 }
10101
10102 if (stub_sec != NULL
10103 || htab->glink->rawsize != htab->glink->size)
10104 {
10105 htab->stub_error = TRUE;
10106 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10107 }
10108
10109 if (htab->stub_error)
10110 return FALSE;
10111
10112 if (stats != NULL)
10113 {
10114 *stats = bfd_malloc (500);
10115 if (*stats == NULL)
10116 return FALSE;
10117
10118 sprintf (*stats, _("linker stubs in %u group%s\n"
10119 " branch %lu\n"
10120 " toc adjust %lu\n"
10121 " long branch %lu\n"
10122 " long toc adj %lu\n"
10123 " plt call %lu"),
10124 stub_sec_count,
10125 stub_sec_count == 1 ? "" : "s",
10126 htab->stub_count[ppc_stub_long_branch - 1],
10127 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10128 htab->stub_count[ppc_stub_plt_branch - 1],
10129 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10130 htab->stub_count[ppc_stub_plt_call - 1]);
10131 }
10132 return TRUE;
10133 }
10134
10135 /* This function undoes the changes made by add_symbol_adjust. */
10136
10137 static bfd_boolean
10138 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10139 {
10140 struct ppc_link_hash_entry *eh;
10141
10142 if (h->root.type == bfd_link_hash_indirect)
10143 return TRUE;
10144
10145 if (h->root.type == bfd_link_hash_warning)
10146 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10147
10148 eh = (struct ppc_link_hash_entry *) h;
10149 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10150 return TRUE;
10151
10152 eh->elf.root.type = bfd_link_hash_undefined;
10153 return TRUE;
10154 }
10155
10156 void
10157 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10158 {
10159 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10160 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10161 }
10162
10163 /* What to do when ld finds relocations against symbols defined in
10164 discarded sections. */
10165
10166 static unsigned int
10167 ppc64_elf_action_discarded (asection *sec)
10168 {
10169 if (strcmp (".opd", sec->name) == 0)
10170 return 0;
10171
10172 if (strcmp (".toc", sec->name) == 0)
10173 return 0;
10174
10175 if (strcmp (".toc1", sec->name) == 0)
10176 return 0;
10177
10178 return _bfd_elf_default_action_discarded (sec);
10179 }
10180
10181 /* The RELOCATE_SECTION function is called by the ELF backend linker
10182 to handle the relocations for a section.
10183
10184 The relocs are always passed as Rela structures; if the section
10185 actually uses Rel structures, the r_addend field will always be
10186 zero.
10187
10188 This function is responsible for adjust the section contents as
10189 necessary, and (if using Rela relocs and generating a
10190 relocatable output file) adjusting the reloc addend as
10191 necessary.
10192
10193 This function does not have to worry about setting the reloc
10194 address or the reloc symbol index.
10195
10196 LOCAL_SYMS is a pointer to the swapped in local symbols.
10197
10198 LOCAL_SECTIONS is an array giving the section in the input file
10199 corresponding to the st_shndx field of each local symbol.
10200
10201 The global hash table entry for the global symbols can be found
10202 via elf_sym_hashes (input_bfd).
10203
10204 When generating relocatable output, this function must handle
10205 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10206 going to be the section symbol corresponding to the output
10207 section, which means that the addend must be adjusted
10208 accordingly. */
10209
10210 static bfd_boolean
10211 ppc64_elf_relocate_section (bfd *output_bfd,
10212 struct bfd_link_info *info,
10213 bfd *input_bfd,
10214 asection *input_section,
10215 bfd_byte *contents,
10216 Elf_Internal_Rela *relocs,
10217 Elf_Internal_Sym *local_syms,
10218 asection **local_sections)
10219 {
10220 struct ppc_link_hash_table *htab;
10221 Elf_Internal_Shdr *symtab_hdr;
10222 struct elf_link_hash_entry **sym_hashes;
10223 Elf_Internal_Rela *rel;
10224 Elf_Internal_Rela *relend;
10225 Elf_Internal_Rela outrel;
10226 bfd_byte *loc;
10227 struct got_entry **local_got_ents;
10228 bfd_vma TOCstart;
10229 bfd_boolean ret = TRUE;
10230 bfd_boolean is_opd;
10231 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10232 bfd_boolean is_power4 = FALSE;
10233 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10234
10235 /* Initialize howto table if needed. */
10236 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10237 ppc_howto_init ();
10238
10239 htab = ppc_hash_table (info);
10240
10241 /* Don't relocate stub sections. */
10242 if (input_section->owner == htab->stub_bfd)
10243 return TRUE;
10244
10245 BFD_ASSERT (is_ppc64_elf (input_bfd));
10246
10247 local_got_ents = elf_local_got_ents (input_bfd);
10248 TOCstart = elf_gp (output_bfd);
10249 symtab_hdr = &elf_symtab_hdr (input_bfd);
10250 sym_hashes = elf_sym_hashes (input_bfd);
10251 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10252
10253 rel = relocs;
10254 relend = relocs + input_section->reloc_count;
10255 for (; rel < relend; rel++)
10256 {
10257 enum elf_ppc64_reloc_type r_type;
10258 bfd_vma addend, orig_addend;
10259 bfd_reloc_status_type r;
10260 Elf_Internal_Sym *sym;
10261 asection *sec;
10262 struct elf_link_hash_entry *h_elf;
10263 struct ppc_link_hash_entry *h;
10264 struct ppc_link_hash_entry *fdh;
10265 const char *sym_name;
10266 unsigned long r_symndx, toc_symndx;
10267 bfd_vma toc_addend;
10268 char tls_mask, tls_gd, tls_type;
10269 char sym_type;
10270 bfd_vma relocation;
10271 bfd_boolean unresolved_reloc;
10272 bfd_boolean warned;
10273 unsigned long insn, mask;
10274 struct ppc_stub_hash_entry *stub_entry;
10275 bfd_vma max_br_offset;
10276 bfd_vma from;
10277
10278 r_type = ELF64_R_TYPE (rel->r_info);
10279 r_symndx = ELF64_R_SYM (rel->r_info);
10280
10281 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10282 symbol of the previous ADDR64 reloc. The symbol gives us the
10283 proper TOC base to use. */
10284 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10285 && rel != relocs
10286 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10287 && is_opd)
10288 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10289
10290 sym = NULL;
10291 sec = NULL;
10292 h_elf = NULL;
10293 sym_name = NULL;
10294 unresolved_reloc = FALSE;
10295 warned = FALSE;
10296 orig_addend = rel->r_addend;
10297
10298 if (r_symndx < symtab_hdr->sh_info)
10299 {
10300 /* It's a local symbol. */
10301 struct _opd_sec_data *opd;
10302
10303 sym = local_syms + r_symndx;
10304 sec = local_sections[r_symndx];
10305 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10306 sym_type = ELF64_ST_TYPE (sym->st_info);
10307 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10308 opd = get_opd_info (sec);
10309 if (opd != NULL && opd->adjust != NULL)
10310 {
10311 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10312 if (adjust == -1)
10313 relocation = 0;
10314 else
10315 {
10316 /* If this is a relocation against the opd section sym
10317 and we have edited .opd, adjust the reloc addend so
10318 that ld -r and ld --emit-relocs output is correct.
10319 If it is a reloc against some other .opd symbol,
10320 then the symbol value will be adjusted later. */
10321 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10322 rel->r_addend += adjust;
10323 else
10324 relocation += adjust;
10325 }
10326 }
10327 }
10328 else
10329 {
10330 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10331 r_symndx, symtab_hdr, sym_hashes,
10332 h_elf, sec, relocation,
10333 unresolved_reloc, warned);
10334 sym_name = h_elf->root.root.string;
10335 sym_type = h_elf->type;
10336 }
10337 h = (struct ppc_link_hash_entry *) h_elf;
10338
10339 if (sec != NULL && elf_discarded_section (sec))
10340 {
10341 /* For relocs against symbols from removed linkonce sections,
10342 or sections discarded by a linker script, we just want the
10343 section contents zeroed. Avoid any special processing. */
10344 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10345 contents + rel->r_offset);
10346 rel->r_info = 0;
10347 rel->r_addend = 0;
10348 continue;
10349 }
10350
10351 if (info->relocatable)
10352 continue;
10353
10354 /* TLS optimizations. Replace instruction sequences and relocs
10355 based on information we collected in tls_optimize. We edit
10356 RELOCS so that --emit-relocs will output something sensible
10357 for the final instruction stream. */
10358 tls_mask = 0;
10359 tls_gd = 0;
10360 toc_symndx = 0;
10361 if (h != NULL)
10362 tls_mask = h->tls_mask;
10363 else if (local_got_ents != NULL)
10364 {
10365 char *lgot_masks;
10366 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10367 tls_mask = lgot_masks[r_symndx];
10368 }
10369 if (tls_mask == 0
10370 && (r_type == R_PPC64_TLS
10371 || r_type == R_PPC64_TLSGD
10372 || r_type == R_PPC64_TLSLD))
10373 {
10374 /* Check for toc tls entries. */
10375 char *toc_tls;
10376
10377 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10378 &local_syms, rel, input_bfd))
10379 return FALSE;
10380
10381 if (toc_tls)
10382 tls_mask = *toc_tls;
10383 }
10384
10385 /* Check that tls relocs are used with tls syms, and non-tls
10386 relocs are used with non-tls syms. */
10387 if (r_symndx != 0
10388 && r_type != R_PPC64_NONE
10389 && (h == NULL
10390 || h->elf.root.type == bfd_link_hash_defined
10391 || h->elf.root.type == bfd_link_hash_defweak)
10392 && (IS_PPC64_TLS_RELOC (r_type)
10393 != (sym_type == STT_TLS
10394 || (sym_type == STT_SECTION
10395 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10396 {
10397 if (tls_mask != 0
10398 && (r_type == R_PPC64_TLS
10399 || r_type == R_PPC64_TLSGD
10400 || r_type == R_PPC64_TLSLD))
10401 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10402 ;
10403 else
10404 (*_bfd_error_handler)
10405 (!IS_PPC64_TLS_RELOC (r_type)
10406 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10407 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10408 input_bfd,
10409 input_section,
10410 (long) rel->r_offset,
10411 ppc64_elf_howto_table[r_type]->name,
10412 sym_name);
10413 }
10414
10415 /* Ensure reloc mapping code below stays sane. */
10416 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10417 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10418 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10419 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10420 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10421 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10422 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10423 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10424 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10425 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10426 abort ();
10427
10428 switch (r_type)
10429 {
10430 default:
10431 break;
10432
10433 case R_PPC64_TOC16:
10434 case R_PPC64_TOC16_LO:
10435 case R_PPC64_TOC16_DS:
10436 case R_PPC64_TOC16_LO_DS:
10437 {
10438 /* Check for toc tls entries. */
10439 char *toc_tls;
10440 int retval;
10441
10442 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
10443 &local_syms, rel, input_bfd);
10444 if (retval == 0)
10445 return FALSE;
10446
10447 if (toc_tls)
10448 {
10449 tls_mask = *toc_tls;
10450 if (r_type == R_PPC64_TOC16_DS
10451 || r_type == R_PPC64_TOC16_LO_DS)
10452 {
10453 if (tls_mask != 0
10454 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10455 goto toctprel;
10456 }
10457 else
10458 {
10459 /* If we found a GD reloc pair, then we might be
10460 doing a GD->IE transition. */
10461 if (retval == 2)
10462 {
10463 tls_gd = TLS_TPRELGD;
10464 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10465 goto tls_ldgd_opt;
10466 }
10467 else if (retval == 3)
10468 {
10469 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10470 goto tls_ldgd_opt;
10471 }
10472 }
10473 }
10474 }
10475 break;
10476
10477 case R_PPC64_GOT_TPREL16_DS:
10478 case R_PPC64_GOT_TPREL16_LO_DS:
10479 if (tls_mask != 0
10480 && (tls_mask & TLS_TPREL) == 0)
10481 {
10482 toctprel:
10483 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10484 insn &= 31 << 21;
10485 insn |= 0x3c0d0000; /* addis 0,13,0 */
10486 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10487 r_type = R_PPC64_TPREL16_HA;
10488 if (toc_symndx != 0)
10489 {
10490 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10491 rel->r_addend = toc_addend;
10492 /* We changed the symbol. Start over in order to
10493 get h, sym, sec etc. right. */
10494 rel--;
10495 continue;
10496 }
10497 else
10498 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10499 }
10500 break;
10501
10502 case R_PPC64_TLS:
10503 if (tls_mask != 0
10504 && (tls_mask & TLS_TPREL) == 0)
10505 {
10506 bfd_vma rtra;
10507 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10508 if ((insn & ((0x3f << 26) | (31 << 11)))
10509 == ((31 << 26) | (13 << 11)))
10510 rtra = insn & ((1 << 26) - (1 << 16));
10511 else if ((insn & ((0x3f << 26) | (31 << 16)))
10512 == ((31 << 26) | (13 << 16)))
10513 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10514 else
10515 abort ();
10516 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10517 /* add -> addi. */
10518 insn = 14 << 26;
10519 else if ((insn & (31 << 1)) == 23 << 1
10520 && ((insn & (31 << 6)) < 14 << 6
10521 || ((insn & (31 << 6)) >= 16 << 6
10522 && (insn & (31 << 6)) < 24 << 6)))
10523 /* load and store indexed -> dform. */
10524 insn = (32 | ((insn >> 6) & 31)) << 26;
10525 else if ((insn & (31 << 1)) == 21 << 1
10526 && (insn & (0x1a << 6)) == 0)
10527 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10528 insn = (((58 | ((insn >> 6) & 4)) << 26)
10529 | ((insn >> 6) & 1));
10530 else if ((insn & (31 << 1)) == 21 << 1
10531 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10532 /* lwax -> lwa. */
10533 insn = (58 << 26) | 2;
10534 else
10535 abort ();
10536 insn |= rtra;
10537 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10538 /* Was PPC64_TLS which sits on insn boundary, now
10539 PPC64_TPREL16_LO which is at low-order half-word. */
10540 rel->r_offset += d_offset;
10541 r_type = R_PPC64_TPREL16_LO;
10542 if (toc_symndx != 0)
10543 {
10544 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10545 rel->r_addend = toc_addend;
10546 /* We changed the symbol. Start over in order to
10547 get h, sym, sec etc. right. */
10548 rel--;
10549 continue;
10550 }
10551 else
10552 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10553 }
10554 break;
10555
10556 case R_PPC64_GOT_TLSGD16_HI:
10557 case R_PPC64_GOT_TLSGD16_HA:
10558 tls_gd = TLS_TPRELGD;
10559 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10560 goto tls_gdld_hi;
10561 break;
10562
10563 case R_PPC64_GOT_TLSLD16_HI:
10564 case R_PPC64_GOT_TLSLD16_HA:
10565 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10566 {
10567 tls_gdld_hi:
10568 if ((tls_mask & tls_gd) != 0)
10569 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10570 + R_PPC64_GOT_TPREL16_DS);
10571 else
10572 {
10573 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10574 rel->r_offset -= d_offset;
10575 r_type = R_PPC64_NONE;
10576 }
10577 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10578 }
10579 break;
10580
10581 case R_PPC64_GOT_TLSGD16:
10582 case R_PPC64_GOT_TLSGD16_LO:
10583 tls_gd = TLS_TPRELGD;
10584 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10585 goto tls_ldgd_opt;
10586 break;
10587
10588 case R_PPC64_GOT_TLSLD16:
10589 case R_PPC64_GOT_TLSLD16_LO:
10590 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10591 {
10592 unsigned int insn1, insn2, insn3;
10593 bfd_vma offset;
10594
10595 tls_ldgd_opt:
10596 offset = (bfd_vma) -1;
10597 /* If not using the newer R_PPC64_TLSGD/LD to mark
10598 __tls_get_addr calls, we must trust that the call
10599 stays with its arg setup insns, ie. that the next
10600 reloc is the __tls_get_addr call associated with
10601 the current reloc. Edit both insns. */
10602 if (input_section->has_tls_get_addr_call
10603 && rel + 1 < relend
10604 && branch_reloc_hash_match (input_bfd, rel + 1,
10605 htab->tls_get_addr,
10606 htab->tls_get_addr_fd))
10607 offset = rel[1].r_offset;
10608 if ((tls_mask & tls_gd) != 0)
10609 {
10610 /* IE */
10611 insn1 = bfd_get_32 (output_bfd,
10612 contents + rel->r_offset - d_offset);
10613 insn1 &= (1 << 26) - (1 << 2);
10614 insn1 |= 58 << 26; /* ld */
10615 insn2 = 0x7c636a14; /* add 3,3,13 */
10616 if (offset != (bfd_vma) -1)
10617 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10618 R_PPC64_NONE);
10619 if ((tls_mask & TLS_EXPLICIT) == 0)
10620 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10621 + R_PPC64_GOT_TPREL16_DS);
10622 else
10623 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10624 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10625 }
10626 else
10627 {
10628 /* LE */
10629 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10630 insn2 = 0x38630000; /* addi 3,3,0 */
10631 if (tls_gd == 0)
10632 {
10633 /* Was an LD reloc. */
10634 if (toc_symndx)
10635 sec = local_sections[toc_symndx];
10636 for (r_symndx = 0;
10637 r_symndx < symtab_hdr->sh_info;
10638 r_symndx++)
10639 if (local_sections[r_symndx] == sec)
10640 break;
10641 if (r_symndx >= symtab_hdr->sh_info)
10642 r_symndx = 0;
10643 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10644 if (r_symndx != 0)
10645 rel->r_addend -= (local_syms[r_symndx].st_value
10646 + sec->output_offset
10647 + sec->output_section->vma);
10648 }
10649 else if (toc_symndx != 0)
10650 {
10651 r_symndx = toc_symndx;
10652 rel->r_addend = toc_addend;
10653 }
10654 r_type = R_PPC64_TPREL16_HA;
10655 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10656 if (offset != (bfd_vma) -1)
10657 {
10658 rel[1].r_info = ELF64_R_INFO (r_symndx,
10659 R_PPC64_TPREL16_LO);
10660 rel[1].r_offset = offset + d_offset;
10661 rel[1].r_addend = rel->r_addend;
10662 }
10663 }
10664 bfd_put_32 (output_bfd, insn1,
10665 contents + rel->r_offset - d_offset);
10666 if (offset != (bfd_vma) -1)
10667 {
10668 insn3 = bfd_get_32 (output_bfd,
10669 contents + offset + 4);
10670 if (insn3 == NOP
10671 || insn3 == CROR_151515 || insn3 == CROR_313131)
10672 {
10673 rel[1].r_offset += 4;
10674 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
10675 insn2 = NOP;
10676 }
10677 bfd_put_32 (output_bfd, insn2, contents + offset);
10678 }
10679 if ((tls_mask & tls_gd) == 0
10680 && (tls_gd == 0 || toc_symndx != 0))
10681 {
10682 /* We changed the symbol. Start over in order
10683 to get h, sym, sec etc. right. */
10684 rel--;
10685 continue;
10686 }
10687 }
10688 break;
10689
10690 case R_PPC64_TLSGD:
10691 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10692 {
10693 unsigned int insn2, insn3;
10694 bfd_vma offset = rel->r_offset;
10695
10696 if ((tls_mask & TLS_TPRELGD) != 0)
10697 {
10698 /* IE */
10699 r_type = R_PPC64_NONE;
10700 insn2 = 0x7c636a14; /* add 3,3,13 */
10701 }
10702 else
10703 {
10704 /* LE */
10705 if (toc_symndx != 0)
10706 {
10707 r_symndx = toc_symndx;
10708 rel->r_addend = toc_addend;
10709 }
10710 r_type = R_PPC64_TPREL16_LO;
10711 rel->r_offset = offset + d_offset;
10712 insn2 = 0x38630000; /* addi 3,3,0 */
10713 }
10714 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10715 /* Zap the reloc on the _tls_get_addr call too. */
10716 BFD_ASSERT (offset == rel[1].r_offset);
10717 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10718 R_PPC64_NONE);
10719 insn3 = bfd_get_32 (output_bfd,
10720 contents + offset + 4);
10721 if (insn3 == NOP
10722 || insn3 == CROR_151515 || insn3 == CROR_313131)
10723 {
10724 rel->r_offset += 4;
10725 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
10726 insn2 = NOP;
10727 }
10728 bfd_put_32 (output_bfd, insn2, contents + offset);
10729 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
10730 {
10731 rel--;
10732 continue;
10733 }
10734 }
10735 break;
10736
10737 case R_PPC64_TLSLD:
10738 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10739 {
10740 unsigned int insn2, insn3;
10741 bfd_vma offset = rel->r_offset;
10742
10743 if (toc_symndx)
10744 sec = local_sections[toc_symndx];
10745 for (r_symndx = 0;
10746 r_symndx < symtab_hdr->sh_info;
10747 r_symndx++)
10748 if (local_sections[r_symndx] == sec)
10749 break;
10750 if (r_symndx >= symtab_hdr->sh_info)
10751 r_symndx = 0;
10752 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10753 if (r_symndx != 0)
10754 rel->r_addend -= (local_syms[r_symndx].st_value
10755 + sec->output_offset
10756 + sec->output_section->vma);
10757
10758 r_type = R_PPC64_TPREL16_LO;
10759 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10760 rel->r_offset = offset + d_offset;
10761 /* Zap the reloc on the _tls_get_addr call too. */
10762 BFD_ASSERT (offset == rel[1].r_offset);
10763 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10764 R_PPC64_NONE);
10765 insn2 = 0x38630000; /* addi 3,3,0 */
10766 insn3 = bfd_get_32 (output_bfd,
10767 contents + offset + 4);
10768 if (insn3 == NOP
10769 || insn3 == CROR_151515 || insn3 == CROR_313131)
10770 {
10771 rel->r_offset += 4;
10772 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
10773 insn2 = NOP;
10774 }
10775 bfd_put_32 (output_bfd, insn2, contents + offset);
10776 rel--;
10777 continue;
10778 }
10779 break;
10780
10781 case R_PPC64_DTPMOD64:
10782 if (rel + 1 < relend
10783 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10784 && rel[1].r_offset == rel->r_offset + 8)
10785 {
10786 if ((tls_mask & TLS_GD) == 0)
10787 {
10788 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10789 if ((tls_mask & TLS_TPRELGD) != 0)
10790 r_type = R_PPC64_TPREL64;
10791 else
10792 {
10793 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10794 r_type = R_PPC64_NONE;
10795 }
10796 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10797 }
10798 }
10799 else
10800 {
10801 if ((tls_mask & TLS_LD) == 0)
10802 {
10803 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10804 r_type = R_PPC64_NONE;
10805 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10806 }
10807 }
10808 break;
10809
10810 case R_PPC64_TPREL64:
10811 if ((tls_mask & TLS_TPREL) == 0)
10812 {
10813 r_type = R_PPC64_NONE;
10814 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10815 }
10816 break;
10817 }
10818
10819 /* Handle other relocations that tweak non-addend part of insn. */
10820 insn = 0;
10821 max_br_offset = 1 << 25;
10822 addend = rel->r_addend;
10823 switch (r_type)
10824 {
10825 default:
10826 break;
10827
10828 /* Branch taken prediction relocations. */
10829 case R_PPC64_ADDR14_BRTAKEN:
10830 case R_PPC64_REL14_BRTAKEN:
10831 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10832 /* Fall thru. */
10833
10834 /* Branch not taken prediction relocations. */
10835 case R_PPC64_ADDR14_BRNTAKEN:
10836 case R_PPC64_REL14_BRNTAKEN:
10837 insn |= bfd_get_32 (output_bfd,
10838 contents + rel->r_offset) & ~(0x01 << 21);
10839 /* Fall thru. */
10840
10841 case R_PPC64_REL14:
10842 max_br_offset = 1 << 15;
10843 /* Fall thru. */
10844
10845 case R_PPC64_REL24:
10846 /* Calls to functions with a different TOC, such as calls to
10847 shared objects, need to alter the TOC pointer. This is
10848 done using a linkage stub. A REL24 branching to these
10849 linkage stubs needs to be followed by a nop, as the nop
10850 will be replaced with an instruction to restore the TOC
10851 base pointer. */
10852 stub_entry = NULL;
10853 fdh = h;
10854 if (((h != NULL
10855 && (((fdh = h->oh) != NULL
10856 && fdh->elf.plt.plist != NULL)
10857 || (fdh = h)->elf.plt.plist != NULL))
10858 || (sec != NULL
10859 && sec->output_section != NULL
10860 && sec->id <= htab->top_id
10861 && (htab->stub_group[sec->id].toc_off
10862 != htab->stub_group[input_section->id].toc_off)))
10863 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10864 rel, htab)) != NULL
10865 && (stub_entry->stub_type == ppc_stub_plt_call
10866 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10867 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10868 {
10869 bfd_boolean can_plt_call = FALSE;
10870
10871 if (rel->r_offset + 8 <= input_section->size)
10872 {
10873 unsigned long nop;
10874 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10875 if (nop == NOP
10876 || nop == CROR_151515 || nop == CROR_313131)
10877 {
10878 bfd_put_32 (input_bfd, LD_R2_40R1,
10879 contents + rel->r_offset + 4);
10880 can_plt_call = TRUE;
10881 }
10882 }
10883
10884 if (!can_plt_call)
10885 {
10886 if (stub_entry->stub_type == ppc_stub_plt_call)
10887 {
10888 /* If this is a plain branch rather than a branch
10889 and link, don't require a nop. However, don't
10890 allow tail calls in a shared library as they
10891 will result in r2 being corrupted. */
10892 unsigned long br;
10893 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10894 if (info->executable && (br & 1) == 0)
10895 can_plt_call = TRUE;
10896 else
10897 stub_entry = NULL;
10898 }
10899 else if (h != NULL
10900 && strcmp (h->elf.root.root.string,
10901 ".__libc_start_main") == 0)
10902 {
10903 /* Allow crt1 branch to go via a toc adjusting stub. */
10904 can_plt_call = TRUE;
10905 }
10906 else
10907 {
10908 if (strcmp (input_section->output_section->name,
10909 ".init") == 0
10910 || strcmp (input_section->output_section->name,
10911 ".fini") == 0)
10912 (*_bfd_error_handler)
10913 (_("%B(%A+0x%lx): automatic multiple TOCs "
10914 "not supported using your crt files; "
10915 "recompile with -mminimal-toc or upgrade gcc"),
10916 input_bfd,
10917 input_section,
10918 (long) rel->r_offset);
10919 else
10920 (*_bfd_error_handler)
10921 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10922 "does not allow automatic multiple TOCs; "
10923 "recompile with -mminimal-toc or "
10924 "-fno-optimize-sibling-calls, "
10925 "or make `%s' extern"),
10926 input_bfd,
10927 input_section,
10928 (long) rel->r_offset,
10929 sym_name,
10930 sym_name);
10931 bfd_set_error (bfd_error_bad_value);
10932 ret = FALSE;
10933 }
10934 }
10935
10936 if (can_plt_call
10937 && stub_entry->stub_type == ppc_stub_plt_call)
10938 unresolved_reloc = FALSE;
10939 }
10940
10941 if (stub_entry == NULL
10942 && get_opd_info (sec) != NULL)
10943 {
10944 /* The branch destination is the value of the opd entry. */
10945 bfd_vma off = (relocation + addend
10946 - sec->output_section->vma
10947 - sec->output_offset);
10948 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10949 if (dest != (bfd_vma) -1)
10950 {
10951 relocation = dest;
10952 addend = 0;
10953 }
10954 }
10955
10956 /* If the branch is out of reach we ought to have a long
10957 branch stub. */
10958 from = (rel->r_offset
10959 + input_section->output_offset
10960 + input_section->output_section->vma);
10961
10962 if (stub_entry == NULL
10963 && (relocation + addend - from + max_br_offset
10964 >= 2 * max_br_offset)
10965 && r_type != R_PPC64_ADDR14_BRTAKEN
10966 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10967 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10968 htab);
10969
10970 if (stub_entry != NULL)
10971 {
10972 /* Munge up the value and addend so that we call the stub
10973 rather than the procedure directly. */
10974 relocation = (stub_entry->stub_offset
10975 + stub_entry->stub_sec->output_offset
10976 + stub_entry->stub_sec->output_section->vma);
10977 addend = 0;
10978 }
10979
10980 if (insn != 0)
10981 {
10982 if (is_power4)
10983 {
10984 /* Set 'a' bit. This is 0b00010 in BO field for branch
10985 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10986 for branch on CTR insns (BO == 1a00t or 1a01t). */
10987 if ((insn & (0x14 << 21)) == (0x04 << 21))
10988 insn |= 0x02 << 21;
10989 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10990 insn |= 0x08 << 21;
10991 else
10992 break;
10993 }
10994 else
10995 {
10996 /* Invert 'y' bit if not the default. */
10997 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10998 insn ^= 0x01 << 21;
10999 }
11000
11001 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
11002 }
11003
11004 /* NOP out calls to undefined weak functions.
11005 We can thus call a weak function without first
11006 checking whether the function is defined. */
11007 else if (h != NULL
11008 && h->elf.root.type == bfd_link_hash_undefweak
11009 && r_type == R_PPC64_REL24
11010 && relocation == 0
11011 && addend == 0)
11012 {
11013 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
11014 continue;
11015 }
11016 break;
11017 }
11018
11019 /* Set `addend'. */
11020 tls_type = 0;
11021 switch (r_type)
11022 {
11023 default:
11024 (*_bfd_error_handler)
11025 (_("%B: unknown relocation type %d for symbol %s"),
11026 input_bfd, (int) r_type, sym_name);
11027
11028 bfd_set_error (bfd_error_bad_value);
11029 ret = FALSE;
11030 continue;
11031
11032 case R_PPC64_NONE:
11033 case R_PPC64_TLS:
11034 case R_PPC64_TLSGD:
11035 case R_PPC64_TLSLD:
11036 case R_PPC64_GNU_VTINHERIT:
11037 case R_PPC64_GNU_VTENTRY:
11038 continue;
11039
11040 /* GOT16 relocations. Like an ADDR16 using the symbol's
11041 address in the GOT as relocation value instead of the
11042 symbol's value itself. Also, create a GOT entry for the
11043 symbol and put the symbol value there. */
11044 case R_PPC64_GOT_TLSGD16:
11045 case R_PPC64_GOT_TLSGD16_LO:
11046 case R_PPC64_GOT_TLSGD16_HI:
11047 case R_PPC64_GOT_TLSGD16_HA:
11048 tls_type = TLS_TLS | TLS_GD;
11049 goto dogot;
11050
11051 case R_PPC64_GOT_TLSLD16:
11052 case R_PPC64_GOT_TLSLD16_LO:
11053 case R_PPC64_GOT_TLSLD16_HI:
11054 case R_PPC64_GOT_TLSLD16_HA:
11055 tls_type = TLS_TLS | TLS_LD;
11056 goto dogot;
11057
11058 case R_PPC64_GOT_TPREL16_DS:
11059 case R_PPC64_GOT_TPREL16_LO_DS:
11060 case R_PPC64_GOT_TPREL16_HI:
11061 case R_PPC64_GOT_TPREL16_HA:
11062 tls_type = TLS_TLS | TLS_TPREL;
11063 goto dogot;
11064
11065 case R_PPC64_GOT_DTPREL16_DS:
11066 case R_PPC64_GOT_DTPREL16_LO_DS:
11067 case R_PPC64_GOT_DTPREL16_HI:
11068 case R_PPC64_GOT_DTPREL16_HA:
11069 tls_type = TLS_TLS | TLS_DTPREL;
11070 goto dogot;
11071
11072 case R_PPC64_GOT16:
11073 case R_PPC64_GOT16_LO:
11074 case R_PPC64_GOT16_HI:
11075 case R_PPC64_GOT16_HA:
11076 case R_PPC64_GOT16_DS:
11077 case R_PPC64_GOT16_LO_DS:
11078 dogot:
11079 {
11080 /* Relocation is to the entry for this symbol in the global
11081 offset table. */
11082 asection *got;
11083 bfd_vma *offp;
11084 bfd_vma off;
11085 unsigned long indx = 0;
11086
11087 if (tls_type == (TLS_TLS | TLS_LD)
11088 && (h == NULL
11089 || !h->elf.def_dynamic))
11090 offp = &ppc64_tlsld_got (input_bfd)->offset;
11091 else
11092 {
11093 struct got_entry *ent;
11094
11095 if (h != NULL)
11096 {
11097 bfd_boolean dyn = htab->elf.dynamic_sections_created;
11098 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
11099 &h->elf)
11100 || (info->shared
11101 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
11102 /* This is actually a static link, or it is a
11103 -Bsymbolic link and the symbol is defined
11104 locally, or the symbol was forced to be local
11105 because of a version file. */
11106 ;
11107 else
11108 {
11109 indx = h->elf.dynindx;
11110 unresolved_reloc = FALSE;
11111 }
11112 ent = h->elf.got.glist;
11113 }
11114 else
11115 {
11116 if (local_got_ents == NULL)
11117 abort ();
11118 ent = local_got_ents[r_symndx];
11119 }
11120
11121 for (; ent != NULL; ent = ent->next)
11122 if (ent->addend == orig_addend
11123 && ent->owner == input_bfd
11124 && ent->tls_type == tls_type)
11125 break;
11126 if (ent == NULL)
11127 abort ();
11128 offp = &ent->got.offset;
11129 }
11130
11131 got = ppc64_elf_tdata (input_bfd)->got;
11132 if (got == NULL)
11133 abort ();
11134
11135 /* The offset must always be a multiple of 8. We use the
11136 least significant bit to record whether we have already
11137 processed this entry. */
11138 off = *offp;
11139 if ((off & 1) != 0)
11140 off &= ~1;
11141 else
11142 {
11143 /* Generate relocs for the dynamic linker, except in
11144 the case of TLSLD where we'll use one entry per
11145 module. */
11146 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
11147
11148 *offp = off | 1;
11149 if ((info->shared || indx != 0)
11150 && (offp == &ppc64_tlsld_got (input_bfd)->offset
11151 || h == NULL
11152 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11153 || h->elf.root.type != bfd_link_hash_undefweak))
11154 {
11155 outrel.r_offset = (got->output_section->vma
11156 + got->output_offset
11157 + off);
11158 outrel.r_addend = addend;
11159 if (tls_type & (TLS_LD | TLS_GD))
11160 {
11161 outrel.r_addend = 0;
11162 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11163 if (tls_type == (TLS_TLS | TLS_GD))
11164 {
11165 loc = relgot->contents;
11166 loc += (relgot->reloc_count++
11167 * sizeof (Elf64_External_Rela));
11168 bfd_elf64_swap_reloca_out (output_bfd,
11169 &outrel, loc);
11170 outrel.r_offset += 8;
11171 outrel.r_addend = addend;
11172 outrel.r_info
11173 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11174 }
11175 }
11176 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11177 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11178 else if (tls_type == (TLS_TLS | TLS_TPREL))
11179 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11180 else if (indx == 0)
11181 {
11182 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
11183
11184 /* Write the .got section contents for the sake
11185 of prelink. */
11186 loc = got->contents + off;
11187 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11188 loc);
11189 }
11190 else
11191 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11192
11193 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11194 {
11195 outrel.r_addend += relocation;
11196 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11197 outrel.r_addend -= htab->elf.tls_sec->vma;
11198 }
11199 loc = relgot->contents;
11200 loc += (relgot->reloc_count++
11201 * sizeof (Elf64_External_Rela));
11202 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11203 }
11204
11205 /* Init the .got section contents here if we're not
11206 emitting a reloc. */
11207 else
11208 {
11209 relocation += addend;
11210 if (tls_type == (TLS_TLS | TLS_LD))
11211 relocation = 1;
11212 else if (tls_type != 0)
11213 {
11214 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11215 if (tls_type == (TLS_TLS | TLS_TPREL))
11216 relocation += DTP_OFFSET - TP_OFFSET;
11217
11218 if (tls_type == (TLS_TLS | TLS_GD))
11219 {
11220 bfd_put_64 (output_bfd, relocation,
11221 got->contents + off + 8);
11222 relocation = 1;
11223 }
11224 }
11225
11226 bfd_put_64 (output_bfd, relocation,
11227 got->contents + off);
11228 }
11229 }
11230
11231 if (off >= (bfd_vma) -2)
11232 abort ();
11233
11234 relocation = got->output_offset + off;
11235
11236 /* TOC base (r2) is TOC start plus 0x8000. */
11237 addend = -TOC_BASE_OFF;
11238 }
11239 break;
11240
11241 case R_PPC64_PLT16_HA:
11242 case R_PPC64_PLT16_HI:
11243 case R_PPC64_PLT16_LO:
11244 case R_PPC64_PLT32:
11245 case R_PPC64_PLT64:
11246 /* Relocation is to the entry for this symbol in the
11247 procedure linkage table. */
11248
11249 /* Resolve a PLT reloc against a local symbol directly,
11250 without using the procedure linkage table. */
11251 if (h == NULL)
11252 break;
11253
11254 /* It's possible that we didn't make a PLT entry for this
11255 symbol. This happens when statically linking PIC code,
11256 or when using -Bsymbolic. Go find a match if there is a
11257 PLT entry. */
11258 if (htab->plt != NULL)
11259 {
11260 struct plt_entry *ent;
11261 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11262 if (ent->addend == orig_addend
11263 && ent->plt.offset != (bfd_vma) -1)
11264 {
11265 relocation = (htab->plt->output_section->vma
11266 + htab->plt->output_offset
11267 + ent->plt.offset);
11268 unresolved_reloc = FALSE;
11269 }
11270 }
11271 break;
11272
11273 case R_PPC64_TOC:
11274 /* Relocation value is TOC base. */
11275 relocation = TOCstart;
11276 if (r_symndx == 0)
11277 relocation += htab->stub_group[input_section->id].toc_off;
11278 else if (unresolved_reloc)
11279 ;
11280 else if (sec != NULL && sec->id <= htab->top_id)
11281 relocation += htab->stub_group[sec->id].toc_off;
11282 else
11283 unresolved_reloc = TRUE;
11284 goto dodyn;
11285
11286 /* TOC16 relocs. We want the offset relative to the TOC base,
11287 which is the address of the start of the TOC plus 0x8000.
11288 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11289 in this order. */
11290 case R_PPC64_TOC16:
11291 case R_PPC64_TOC16_LO:
11292 case R_PPC64_TOC16_HI:
11293 case R_PPC64_TOC16_DS:
11294 case R_PPC64_TOC16_LO_DS:
11295 case R_PPC64_TOC16_HA:
11296 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11297 break;
11298
11299 /* Relocate against the beginning of the section. */
11300 case R_PPC64_SECTOFF:
11301 case R_PPC64_SECTOFF_LO:
11302 case R_PPC64_SECTOFF_HI:
11303 case R_PPC64_SECTOFF_DS:
11304 case R_PPC64_SECTOFF_LO_DS:
11305 case R_PPC64_SECTOFF_HA:
11306 if (sec != NULL)
11307 addend -= sec->output_section->vma;
11308 break;
11309
11310 case R_PPC64_REL14:
11311 case R_PPC64_REL14_BRNTAKEN:
11312 case R_PPC64_REL14_BRTAKEN:
11313 case R_PPC64_REL24:
11314 break;
11315
11316 case R_PPC64_TPREL16:
11317 case R_PPC64_TPREL16_LO:
11318 case R_PPC64_TPREL16_HI:
11319 case R_PPC64_TPREL16_HA:
11320 case R_PPC64_TPREL16_DS:
11321 case R_PPC64_TPREL16_LO_DS:
11322 case R_PPC64_TPREL16_HIGHER:
11323 case R_PPC64_TPREL16_HIGHERA:
11324 case R_PPC64_TPREL16_HIGHEST:
11325 case R_PPC64_TPREL16_HIGHESTA:
11326 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11327 if (info->shared)
11328 /* The TPREL16 relocs shouldn't really be used in shared
11329 libs as they will result in DT_TEXTREL being set, but
11330 support them anyway. */
11331 goto dodyn;
11332 break;
11333
11334 case R_PPC64_DTPREL16:
11335 case R_PPC64_DTPREL16_LO:
11336 case R_PPC64_DTPREL16_HI:
11337 case R_PPC64_DTPREL16_HA:
11338 case R_PPC64_DTPREL16_DS:
11339 case R_PPC64_DTPREL16_LO_DS:
11340 case R_PPC64_DTPREL16_HIGHER:
11341 case R_PPC64_DTPREL16_HIGHERA:
11342 case R_PPC64_DTPREL16_HIGHEST:
11343 case R_PPC64_DTPREL16_HIGHESTA:
11344 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11345 break;
11346
11347 case R_PPC64_DTPMOD64:
11348 relocation = 1;
11349 addend = 0;
11350 goto dodyn;
11351
11352 case R_PPC64_TPREL64:
11353 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11354 goto dodyn;
11355
11356 case R_PPC64_DTPREL64:
11357 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11358 /* Fall thru */
11359
11360 /* Relocations that may need to be propagated if this is a
11361 dynamic object. */
11362 case R_PPC64_REL30:
11363 case R_PPC64_REL32:
11364 case R_PPC64_REL64:
11365 case R_PPC64_ADDR14:
11366 case R_PPC64_ADDR14_BRNTAKEN:
11367 case R_PPC64_ADDR14_BRTAKEN:
11368 case R_PPC64_ADDR16:
11369 case R_PPC64_ADDR16_DS:
11370 case R_PPC64_ADDR16_HA:
11371 case R_PPC64_ADDR16_HI:
11372 case R_PPC64_ADDR16_HIGHER:
11373 case R_PPC64_ADDR16_HIGHERA:
11374 case R_PPC64_ADDR16_HIGHEST:
11375 case R_PPC64_ADDR16_HIGHESTA:
11376 case R_PPC64_ADDR16_LO:
11377 case R_PPC64_ADDR16_LO_DS:
11378 case R_PPC64_ADDR24:
11379 case R_PPC64_ADDR32:
11380 case R_PPC64_ADDR64:
11381 case R_PPC64_UADDR16:
11382 case R_PPC64_UADDR32:
11383 case R_PPC64_UADDR64:
11384 dodyn:
11385 if ((input_section->flags & SEC_ALLOC) == 0)
11386 break;
11387
11388 if (NO_OPD_RELOCS && is_opd)
11389 break;
11390
11391 if ((info->shared
11392 && (h == NULL
11393 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11394 || h->elf.root.type != bfd_link_hash_undefweak)
11395 && (must_be_dyn_reloc (info, r_type)
11396 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11397 || (ELIMINATE_COPY_RELOCS
11398 && !info->shared
11399 && h != NULL
11400 && h->elf.dynindx != -1
11401 && !h->elf.non_got_ref
11402 && !h->elf.def_regular))
11403 {
11404 Elf_Internal_Rela outrel;
11405 bfd_boolean skip, relocate;
11406 asection *sreloc;
11407 bfd_byte *loc;
11408 bfd_vma out_off;
11409
11410 /* When generating a dynamic object, these relocations
11411 are copied into the output file to be resolved at run
11412 time. */
11413
11414 skip = FALSE;
11415 relocate = FALSE;
11416
11417 out_off = _bfd_elf_section_offset (output_bfd, info,
11418 input_section, rel->r_offset);
11419 if (out_off == (bfd_vma) -1)
11420 skip = TRUE;
11421 else if (out_off == (bfd_vma) -2)
11422 skip = TRUE, relocate = TRUE;
11423 out_off += (input_section->output_section->vma
11424 + input_section->output_offset);
11425 outrel.r_offset = out_off;
11426 outrel.r_addend = rel->r_addend;
11427
11428 /* Optimize unaligned reloc use. */
11429 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11430 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11431 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11432 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11433 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11434 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11435 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11436 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11437 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11438
11439 if (skip)
11440 memset (&outrel, 0, sizeof outrel);
11441 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11442 && !is_opd
11443 && r_type != R_PPC64_TOC)
11444 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11445 else
11446 {
11447 /* This symbol is local, or marked to become local,
11448 or this is an opd section reloc which must point
11449 at a local function. */
11450 outrel.r_addend += relocation;
11451 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11452 {
11453 if (is_opd && h != NULL)
11454 {
11455 /* Lie about opd entries. This case occurs
11456 when building shared libraries and we
11457 reference a function in another shared
11458 lib. The same thing happens for a weak
11459 definition in an application that's
11460 overridden by a strong definition in a
11461 shared lib. (I believe this is a generic
11462 bug in binutils handling of weak syms.)
11463 In these cases we won't use the opd
11464 entry in this lib. */
11465 unresolved_reloc = FALSE;
11466 }
11467 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11468
11469 /* We need to relocate .opd contents for ld.so.
11470 Prelink also wants simple and consistent rules
11471 for relocs. This make all RELATIVE relocs have
11472 *r_offset equal to r_addend. */
11473 relocate = TRUE;
11474 }
11475 else
11476 {
11477 long indx = 0;
11478
11479 if (r_symndx == 0 || bfd_is_abs_section (sec))
11480 ;
11481 else if (sec == NULL || sec->owner == NULL)
11482 {
11483 bfd_set_error (bfd_error_bad_value);
11484 return FALSE;
11485 }
11486 else
11487 {
11488 asection *osec;
11489
11490 osec = sec->output_section;
11491 indx = elf_section_data (osec)->dynindx;
11492
11493 if (indx == 0)
11494 {
11495 if ((osec->flags & SEC_READONLY) == 0
11496 && htab->elf.data_index_section != NULL)
11497 osec = htab->elf.data_index_section;
11498 else
11499 osec = htab->elf.text_index_section;
11500 indx = elf_section_data (osec)->dynindx;
11501 }
11502 BFD_ASSERT (indx != 0);
11503
11504 /* We are turning this relocation into one
11505 against a section symbol, so subtract out
11506 the output section's address but not the
11507 offset of the input section in the output
11508 section. */
11509 outrel.r_addend -= osec->vma;
11510 }
11511
11512 outrel.r_info = ELF64_R_INFO (indx, r_type);
11513 }
11514 }
11515
11516 sreloc = elf_section_data (input_section)->sreloc;
11517 if (sreloc == NULL)
11518 abort ();
11519
11520 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11521 >= sreloc->size)
11522 abort ();
11523 loc = sreloc->contents;
11524 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11525 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11526
11527 /* If this reloc is against an external symbol, it will
11528 be computed at runtime, so there's no need to do
11529 anything now. However, for the sake of prelink ensure
11530 that the section contents are a known value. */
11531 if (! relocate)
11532 {
11533 unresolved_reloc = FALSE;
11534 /* The value chosen here is quite arbitrary as ld.so
11535 ignores section contents except for the special
11536 case of .opd where the contents might be accessed
11537 before relocation. Choose zero, as that won't
11538 cause reloc overflow. */
11539 relocation = 0;
11540 addend = 0;
11541 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11542 to improve backward compatibility with older
11543 versions of ld. */
11544 if (r_type == R_PPC64_ADDR64)
11545 addend = outrel.r_addend;
11546 /* Adjust pc_relative relocs to have zero in *r_offset. */
11547 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11548 addend = (input_section->output_section->vma
11549 + input_section->output_offset
11550 + rel->r_offset);
11551 }
11552 }
11553 break;
11554
11555 case R_PPC64_COPY:
11556 case R_PPC64_GLOB_DAT:
11557 case R_PPC64_JMP_SLOT:
11558 case R_PPC64_RELATIVE:
11559 /* We shouldn't ever see these dynamic relocs in relocatable
11560 files. */
11561 /* Fall through. */
11562
11563 case R_PPC64_PLTGOT16:
11564 case R_PPC64_PLTGOT16_DS:
11565 case R_PPC64_PLTGOT16_HA:
11566 case R_PPC64_PLTGOT16_HI:
11567 case R_PPC64_PLTGOT16_LO:
11568 case R_PPC64_PLTGOT16_LO_DS:
11569 case R_PPC64_PLTREL32:
11570 case R_PPC64_PLTREL64:
11571 /* These ones haven't been implemented yet. */
11572
11573 (*_bfd_error_handler)
11574 (_("%B: relocation %s is not supported for symbol %s."),
11575 input_bfd,
11576 ppc64_elf_howto_table[r_type]->name, sym_name);
11577
11578 bfd_set_error (bfd_error_invalid_operation);
11579 ret = FALSE;
11580 continue;
11581 }
11582
11583 /* Do any further special processing. */
11584 switch (r_type)
11585 {
11586 default:
11587 break;
11588
11589 case R_PPC64_ADDR16_HA:
11590 case R_PPC64_ADDR16_HIGHERA:
11591 case R_PPC64_ADDR16_HIGHESTA:
11592 case R_PPC64_TOC16_HA:
11593 case R_PPC64_SECTOFF_HA:
11594 case R_PPC64_TPREL16_HA:
11595 case R_PPC64_DTPREL16_HA:
11596 case R_PPC64_TPREL16_HIGHER:
11597 case R_PPC64_TPREL16_HIGHERA:
11598 case R_PPC64_TPREL16_HIGHEST:
11599 case R_PPC64_TPREL16_HIGHESTA:
11600 case R_PPC64_DTPREL16_HIGHER:
11601 case R_PPC64_DTPREL16_HIGHERA:
11602 case R_PPC64_DTPREL16_HIGHEST:
11603 case R_PPC64_DTPREL16_HIGHESTA:
11604 /* It's just possible that this symbol is a weak symbol
11605 that's not actually defined anywhere. In that case,
11606 'sec' would be NULL, and we should leave the symbol
11607 alone (it will be set to zero elsewhere in the link). */
11608 if (sec == NULL)
11609 break;
11610 /* Fall thru */
11611
11612 case R_PPC64_GOT16_HA:
11613 case R_PPC64_PLTGOT16_HA:
11614 case R_PPC64_PLT16_HA:
11615 case R_PPC64_GOT_TLSGD16_HA:
11616 case R_PPC64_GOT_TLSLD16_HA:
11617 case R_PPC64_GOT_TPREL16_HA:
11618 case R_PPC64_GOT_DTPREL16_HA:
11619 /* Add 0x10000 if sign bit in 0:15 is set.
11620 Bits 0:15 are not used. */
11621 addend += 0x8000;
11622 break;
11623
11624 case R_PPC64_ADDR16_DS:
11625 case R_PPC64_ADDR16_LO_DS:
11626 case R_PPC64_GOT16_DS:
11627 case R_PPC64_GOT16_LO_DS:
11628 case R_PPC64_PLT16_LO_DS:
11629 case R_PPC64_SECTOFF_DS:
11630 case R_PPC64_SECTOFF_LO_DS:
11631 case R_PPC64_TOC16_DS:
11632 case R_PPC64_TOC16_LO_DS:
11633 case R_PPC64_PLTGOT16_DS:
11634 case R_PPC64_PLTGOT16_LO_DS:
11635 case R_PPC64_GOT_TPREL16_DS:
11636 case R_PPC64_GOT_TPREL16_LO_DS:
11637 case R_PPC64_GOT_DTPREL16_DS:
11638 case R_PPC64_GOT_DTPREL16_LO_DS:
11639 case R_PPC64_TPREL16_DS:
11640 case R_PPC64_TPREL16_LO_DS:
11641 case R_PPC64_DTPREL16_DS:
11642 case R_PPC64_DTPREL16_LO_DS:
11643 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11644 mask = 3;
11645 /* If this reloc is against an lq insn, then the value must be
11646 a multiple of 16. This is somewhat of a hack, but the
11647 "correct" way to do this by defining _DQ forms of all the
11648 _DS relocs bloats all reloc switches in this file. It
11649 doesn't seem to make much sense to use any of these relocs
11650 in data, so testing the insn should be safe. */
11651 if ((insn & (0x3f << 26)) == (56u << 26))
11652 mask = 15;
11653 if (((relocation + addend) & mask) != 0)
11654 {
11655 (*_bfd_error_handler)
11656 (_("%B: error: relocation %s not a multiple of %d"),
11657 input_bfd,
11658 ppc64_elf_howto_table[r_type]->name,
11659 mask + 1);
11660 bfd_set_error (bfd_error_bad_value);
11661 ret = FALSE;
11662 continue;
11663 }
11664 break;
11665 }
11666
11667 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11668 because such sections are not SEC_ALLOC and thus ld.so will
11669 not process them. */
11670 if (unresolved_reloc
11671 && !((input_section->flags & SEC_DEBUGGING) != 0
11672 && h->elf.def_dynamic))
11673 {
11674 (*_bfd_error_handler)
11675 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11676 input_bfd,
11677 input_section,
11678 (long) rel->r_offset,
11679 ppc64_elf_howto_table[(int) r_type]->name,
11680 h->elf.root.root.string);
11681 ret = FALSE;
11682 }
11683
11684 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11685 input_bfd,
11686 input_section,
11687 contents,
11688 rel->r_offset,
11689 relocation,
11690 addend);
11691
11692 if (r != bfd_reloc_ok)
11693 {
11694 if (sym_name == NULL)
11695 sym_name = "(null)";
11696 if (r == bfd_reloc_overflow)
11697 {
11698 if (warned)
11699 continue;
11700 if (h != NULL
11701 && h->elf.root.type == bfd_link_hash_undefweak
11702 && ppc64_elf_howto_table[r_type]->pc_relative)
11703 {
11704 /* Assume this is a call protected by other code that
11705 detects the symbol is undefined. If this is the case,
11706 we can safely ignore the overflow. If not, the
11707 program is hosed anyway, and a little warning isn't
11708 going to help. */
11709
11710 continue;
11711 }
11712
11713 if (!((*info->callbacks->reloc_overflow)
11714 (info, (h ? &h->elf.root : NULL), sym_name,
11715 ppc64_elf_howto_table[r_type]->name,
11716 orig_addend, input_bfd, input_section, rel->r_offset)))
11717 return FALSE;
11718 }
11719 else
11720 {
11721 (*_bfd_error_handler)
11722 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11723 input_bfd,
11724 input_section,
11725 (long) rel->r_offset,
11726 ppc64_elf_howto_table[r_type]->name,
11727 sym_name,
11728 (int) r);
11729 ret = FALSE;
11730 }
11731 }
11732 }
11733
11734 /* If we're emitting relocations, then shortly after this function
11735 returns, reloc offsets and addends for this section will be
11736 adjusted. Worse, reloc symbol indices will be for the output
11737 file rather than the input. Save a copy of the relocs for
11738 opd_entry_value. */
11739 if (is_opd && (info->emitrelocations || info->relocatable))
11740 {
11741 bfd_size_type amt;
11742 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11743 rel = bfd_alloc (input_bfd, amt);
11744 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11745 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11746 if (rel == NULL)
11747 return FALSE;
11748 memcpy (rel, relocs, amt);
11749 }
11750 return ret;
11751 }
11752
11753 /* Adjust the value of any local symbols in opd sections. */
11754
11755 static bfd_boolean
11756 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11757 const char *name ATTRIBUTE_UNUSED,
11758 Elf_Internal_Sym *elfsym,
11759 asection *input_sec,
11760 struct elf_link_hash_entry *h)
11761 {
11762 struct _opd_sec_data *opd;
11763 long adjust;
11764 bfd_vma value;
11765
11766 if (h != NULL)
11767 return TRUE;
11768
11769 opd = get_opd_info (input_sec);
11770 if (opd == NULL || opd->adjust == NULL)
11771 return TRUE;
11772
11773 value = elfsym->st_value - input_sec->output_offset;
11774 if (!info->relocatable)
11775 value -= input_sec->output_section->vma;
11776
11777 adjust = opd->adjust[value / 8];
11778 if (adjust == -1)
11779 elfsym->st_value = 0;
11780 else
11781 elfsym->st_value += adjust;
11782 return TRUE;
11783 }
11784
11785 /* Finish up dynamic symbol handling. We set the contents of various
11786 dynamic sections here. */
11787
11788 static bfd_boolean
11789 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11790 struct bfd_link_info *info,
11791 struct elf_link_hash_entry *h,
11792 Elf_Internal_Sym *sym)
11793 {
11794 struct ppc_link_hash_table *htab;
11795 struct plt_entry *ent;
11796 Elf_Internal_Rela rela;
11797 bfd_byte *loc;
11798
11799 htab = ppc_hash_table (info);
11800
11801 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11802 if (ent->plt.offset != (bfd_vma) -1)
11803 {
11804 /* This symbol has an entry in the procedure linkage
11805 table. Set it up. */
11806
11807 if (htab->plt == NULL
11808 || htab->relplt == NULL
11809 || htab->glink == NULL)
11810 abort ();
11811
11812 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11813 fill in the PLT entry. */
11814 rela.r_offset = (htab->plt->output_section->vma
11815 + htab->plt->output_offset
11816 + ent->plt.offset);
11817 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11818 rela.r_addend = ent->addend;
11819
11820 loc = htab->relplt->contents;
11821 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11822 * sizeof (Elf64_External_Rela));
11823 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11824 }
11825
11826 if (h->needs_copy)
11827 {
11828 Elf_Internal_Rela rela;
11829 bfd_byte *loc;
11830
11831 /* This symbol needs a copy reloc. Set it up. */
11832
11833 if (h->dynindx == -1
11834 || (h->root.type != bfd_link_hash_defined
11835 && h->root.type != bfd_link_hash_defweak)
11836 || htab->relbss == NULL)
11837 abort ();
11838
11839 rela.r_offset = (h->root.u.def.value
11840 + h->root.u.def.section->output_section->vma
11841 + h->root.u.def.section->output_offset);
11842 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11843 rela.r_addend = 0;
11844 loc = htab->relbss->contents;
11845 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11846 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11847 }
11848
11849 /* Mark some specially defined symbols as absolute. */
11850 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11851 sym->st_shndx = SHN_ABS;
11852
11853 return TRUE;
11854 }
11855
11856 /* Used to decide how to sort relocs in an optimal manner for the
11857 dynamic linker, before writing them out. */
11858
11859 static enum elf_reloc_type_class
11860 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11861 {
11862 enum elf_ppc64_reloc_type r_type;
11863
11864 r_type = ELF64_R_TYPE (rela->r_info);
11865 switch (r_type)
11866 {
11867 case R_PPC64_RELATIVE:
11868 return reloc_class_relative;
11869 case R_PPC64_JMP_SLOT:
11870 return reloc_class_plt;
11871 case R_PPC64_COPY:
11872 return reloc_class_copy;
11873 default:
11874 return reloc_class_normal;
11875 }
11876 }
11877
11878 /* Finish up the dynamic sections. */
11879
11880 static bfd_boolean
11881 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11882 struct bfd_link_info *info)
11883 {
11884 struct ppc_link_hash_table *htab;
11885 bfd *dynobj;
11886 asection *sdyn;
11887
11888 htab = ppc_hash_table (info);
11889 dynobj = htab->elf.dynobj;
11890 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11891
11892 if (htab->elf.dynamic_sections_created)
11893 {
11894 Elf64_External_Dyn *dyncon, *dynconend;
11895
11896 if (sdyn == NULL || htab->got == NULL)
11897 abort ();
11898
11899 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11900 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11901 for (; dyncon < dynconend; dyncon++)
11902 {
11903 Elf_Internal_Dyn dyn;
11904 asection *s;
11905
11906 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11907
11908 switch (dyn.d_tag)
11909 {
11910 default:
11911 continue;
11912
11913 case DT_PPC64_GLINK:
11914 s = htab->glink;
11915 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11916 /* We stupidly defined DT_PPC64_GLINK to be the start
11917 of glink rather than the first entry point, which is
11918 what ld.so needs, and now have a bigger stub to
11919 support automatic multiple TOCs. */
11920 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11921 break;
11922
11923 case DT_PPC64_OPD:
11924 s = bfd_get_section_by_name (output_bfd, ".opd");
11925 if (s == NULL)
11926 continue;
11927 dyn.d_un.d_ptr = s->vma;
11928 break;
11929
11930 case DT_PPC64_OPDSZ:
11931 s = bfd_get_section_by_name (output_bfd, ".opd");
11932 if (s == NULL)
11933 continue;
11934 dyn.d_un.d_val = s->size;
11935 break;
11936
11937 case DT_PLTGOT:
11938 s = htab->plt;
11939 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11940 break;
11941
11942 case DT_JMPREL:
11943 s = htab->relplt;
11944 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11945 break;
11946
11947 case DT_PLTRELSZ:
11948 dyn.d_un.d_val = htab->relplt->size;
11949 break;
11950
11951 case DT_RELASZ:
11952 /* Don't count procedure linkage table relocs in the
11953 overall reloc count. */
11954 s = htab->relplt;
11955 if (s == NULL)
11956 continue;
11957 dyn.d_un.d_val -= s->size;
11958 break;
11959
11960 case DT_RELA:
11961 /* We may not be using the standard ELF linker script.
11962 If .rela.plt is the first .rela section, we adjust
11963 DT_RELA to not include it. */
11964 s = htab->relplt;
11965 if (s == NULL)
11966 continue;
11967 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11968 continue;
11969 dyn.d_un.d_ptr += s->size;
11970 break;
11971 }
11972
11973 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11974 }
11975 }
11976
11977 if (htab->got != NULL && htab->got->size != 0)
11978 {
11979 /* Fill in the first entry in the global offset table.
11980 We use it to hold the link-time TOCbase. */
11981 bfd_put_64 (output_bfd,
11982 elf_gp (output_bfd) + TOC_BASE_OFF,
11983 htab->got->contents);
11984
11985 /* Set .got entry size. */
11986 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11987 }
11988
11989 if (htab->plt != NULL && htab->plt->size != 0)
11990 {
11991 /* Set .plt entry size. */
11992 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11993 = PLT_ENTRY_SIZE;
11994 }
11995
11996 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11997 brlt ourselves if emitrelocations. */
11998 if (htab->brlt != NULL
11999 && htab->brlt->reloc_count != 0
12000 && !_bfd_elf_link_output_relocs (output_bfd,
12001 htab->brlt,
12002 &elf_section_data (htab->brlt)->rel_hdr,
12003 elf_section_data (htab->brlt)->relocs,
12004 NULL))
12005 return FALSE;
12006
12007 if (htab->glink != NULL
12008 && htab->glink->reloc_count != 0
12009 && !_bfd_elf_link_output_relocs (output_bfd,
12010 htab->glink,
12011 &elf_section_data (htab->glink)->rel_hdr,
12012 elf_section_data (htab->glink)->relocs,
12013 NULL))
12014 return FALSE;
12015
12016 /* We need to handle writing out multiple GOT sections ourselves,
12017 since we didn't add them to DYNOBJ. We know dynobj is the first
12018 bfd. */
12019 while ((dynobj = dynobj->link_next) != NULL)
12020 {
12021 asection *s;
12022
12023 if (!is_ppc64_elf (dynobj))
12024 continue;
12025
12026 s = ppc64_elf_tdata (dynobj)->got;
12027 if (s != NULL
12028 && s->size != 0
12029 && s->output_section != bfd_abs_section_ptr
12030 && !bfd_set_section_contents (output_bfd, s->output_section,
12031 s->contents, s->output_offset,
12032 s->size))
12033 return FALSE;
12034 s = ppc64_elf_tdata (dynobj)->relgot;
12035 if (s != NULL
12036 && s->size != 0
12037 && s->output_section != bfd_abs_section_ptr
12038 && !bfd_set_section_contents (output_bfd, s->output_section,
12039 s->contents, s->output_offset,
12040 s->size))
12041 return FALSE;
12042 }
12043
12044 return TRUE;
12045 }
12046
12047 #include "elf64-target.h"
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