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[binutils.git] / bfd / elf64-ppc.c
blob727b6ac2b19895d5d692d406b75bc4d72f6ad759
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 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_check_directives
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 reloc 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 /* Computes the load module index of the load module that contains the
1254 definition of its TLS sym. */
1255 HOWTO (R_PPC64_DTPMOD64,
1256 0, /* rightshift */
1257 4, /* size (0 = byte, 1 = short, 2 = long) */
1258 64, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_dont, /* complain_on_overflow */
1262 ppc64_elf_unhandled_reloc, /* special_function */
1263 "R_PPC64_DTPMOD64", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 ONES (64), /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 /* Computes a dtv-relative displacement, the difference between the value
1270 of sym+add and the base address of the thread-local storage block that
1271 contains the definition of sym, minus 0x8000. */
1272 HOWTO (R_PPC64_DTPREL64,
1273 0, /* rightshift */
1274 4, /* size (0 = byte, 1 = short, 2 = long) */
1275 64, /* bitsize */
1276 FALSE, /* pc_relative */
1277 0, /* bitpos */
1278 complain_overflow_dont, /* complain_on_overflow */
1279 ppc64_elf_unhandled_reloc, /* special_function */
1280 "R_PPC64_DTPREL64", /* name */
1281 FALSE, /* partial_inplace */
1282 0, /* src_mask */
1283 ONES (64), /* dst_mask */
1284 FALSE), /* pcrel_offset */
1285
1286 /* A 16 bit dtprel reloc. */
1287 HOWTO (R_PPC64_DTPREL16,
1288 0, /* rightshift */
1289 1, /* size (0 = byte, 1 = short, 2 = long) */
1290 16, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
1293 complain_overflow_signed, /* complain_on_overflow */
1294 ppc64_elf_unhandled_reloc, /* special_function */
1295 "R_PPC64_DTPREL16", /* name */
1296 FALSE, /* partial_inplace */
1297 0, /* src_mask */
1298 0xffff, /* dst_mask */
1299 FALSE), /* pcrel_offset */
1300
1301 /* Like DTPREL16, but no overflow. */
1302 HOWTO (R_PPC64_DTPREL16_LO,
1303 0, /* rightshift */
1304 1, /* size (0 = byte, 1 = short, 2 = long) */
1305 16, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_dont, /* complain_on_overflow */
1309 ppc64_elf_unhandled_reloc, /* special_function */
1310 "R_PPC64_DTPREL16_LO", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 0xffff, /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1317 HOWTO (R_PPC64_DTPREL16_HI,
1318 16, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 ppc64_elf_unhandled_reloc, /* special_function */
1325 "R_PPC64_DTPREL16_HI", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1332 HOWTO (R_PPC64_DTPREL16_HA,
1333 16, /* rightshift */
1334 1, /* size (0 = byte, 1 = short, 2 = long) */
1335 16, /* bitsize */
1336 FALSE, /* pc_relative */
1337 0, /* bitpos */
1338 complain_overflow_dont, /* complain_on_overflow */
1339 ppc64_elf_unhandled_reloc, /* special_function */
1340 "R_PPC64_DTPREL16_HA", /* name */
1341 FALSE, /* partial_inplace */
1342 0, /* src_mask */
1343 0xffff, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1345
1346 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1347 HOWTO (R_PPC64_DTPREL16_HIGHER,
1348 32, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_dont, /* complain_on_overflow */
1354 ppc64_elf_unhandled_reloc, /* special_function */
1355 "R_PPC64_DTPREL16_HIGHER", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1362 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1363 32, /* rightshift */
1364 1, /* size (0 = byte, 1 = short, 2 = long) */
1365 16, /* bitsize */
1366 FALSE, /* pc_relative */
1367 0, /* bitpos */
1368 complain_overflow_dont, /* complain_on_overflow */
1369 ppc64_elf_unhandled_reloc, /* special_function */
1370 "R_PPC64_DTPREL16_HIGHERA", /* name */
1371 FALSE, /* partial_inplace */
1372 0, /* src_mask */
1373 0xffff, /* dst_mask */
1374 FALSE), /* pcrel_offset */
1375
1376 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1377 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1378 48, /* rightshift */
1379 1, /* size (0 = byte, 1 = short, 2 = long) */
1380 16, /* bitsize */
1381 FALSE, /* pc_relative */
1382 0, /* bitpos */
1383 complain_overflow_dont, /* complain_on_overflow */
1384 ppc64_elf_unhandled_reloc, /* special_function */
1385 "R_PPC64_DTPREL16_HIGHEST", /* name */
1386 FALSE, /* partial_inplace */
1387 0, /* src_mask */
1388 0xffff, /* dst_mask */
1389 FALSE), /* pcrel_offset */
1390
1391 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1392 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1393 48, /* rightshift */
1394 1, /* size (0 = byte, 1 = short, 2 = long) */
1395 16, /* bitsize */
1396 FALSE, /* pc_relative */
1397 0, /* bitpos */
1398 complain_overflow_dont, /* complain_on_overflow */
1399 ppc64_elf_unhandled_reloc, /* special_function */
1400 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1401 FALSE, /* partial_inplace */
1402 0, /* src_mask */
1403 0xffff, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1405
1406 /* Like DTPREL16, but for insns with a DS field. */
1407 HOWTO (R_PPC64_DTPREL16_DS,
1408 0, /* rightshift */
1409 1, /* size (0 = byte, 1 = short, 2 = long) */
1410 16, /* bitsize */
1411 FALSE, /* pc_relative */
1412 0, /* bitpos */
1413 complain_overflow_signed, /* complain_on_overflow */
1414 ppc64_elf_unhandled_reloc, /* special_function */
1415 "R_PPC64_DTPREL16_DS", /* name */
1416 FALSE, /* partial_inplace */
1417 0, /* src_mask */
1418 0xfffc, /* dst_mask */
1419 FALSE), /* pcrel_offset */
1420
1421 /* Like DTPREL16_DS, but no overflow. */
1422 HOWTO (R_PPC64_DTPREL16_LO_DS,
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_dont, /* complain_on_overflow */
1429 ppc64_elf_unhandled_reloc, /* special_function */
1430 "R_PPC64_DTPREL16_LO_DS", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xfffc, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* Computes a tp-relative displacement, the difference between the value of
1437 sym+add and the value of the thread pointer (r13). */
1438 HOWTO (R_PPC64_TPREL64,
1439 0, /* rightshift */
1440 4, /* size (0 = byte, 1 = short, 2 = long) */
1441 64, /* bitsize */
1442 FALSE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_dont, /* complain_on_overflow */
1445 ppc64_elf_unhandled_reloc, /* special_function */
1446 "R_PPC64_TPREL64", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 ONES (64), /* dst_mask */
1450 FALSE), /* pcrel_offset */
1451
1452 /* A 16 bit tprel reloc. */
1453 HOWTO (R_PPC64_TPREL16,
1454 0, /* rightshift */
1455 1, /* size (0 = byte, 1 = short, 2 = long) */
1456 16, /* bitsize */
1457 FALSE, /* pc_relative */
1458 0, /* bitpos */
1459 complain_overflow_signed, /* complain_on_overflow */
1460 ppc64_elf_unhandled_reloc, /* special_function */
1461 "R_PPC64_TPREL16", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0xffff, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* Like TPREL16, but no overflow. */
1468 HOWTO (R_PPC64_TPREL16_LO,
1469 0, /* rightshift */
1470 1, /* size (0 = byte, 1 = short, 2 = long) */
1471 16, /* bitsize */
1472 FALSE, /* pc_relative */
1473 0, /* bitpos */
1474 complain_overflow_dont, /* complain_on_overflow */
1475 ppc64_elf_unhandled_reloc, /* special_function */
1476 "R_PPC64_TPREL16_LO", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 0xffff, /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* Like TPREL16_LO, but next higher group of 16 bits. */
1483 HOWTO (R_PPC64_TPREL16_HI,
1484 16, /* rightshift */
1485 1, /* size (0 = byte, 1 = short, 2 = long) */
1486 16, /* bitsize */
1487 FALSE, /* pc_relative */
1488 0, /* bitpos */
1489 complain_overflow_dont, /* complain_on_overflow */
1490 ppc64_elf_unhandled_reloc, /* special_function */
1491 "R_PPC64_TPREL16_HI", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0xffff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Like TPREL16_HI, but adjust for low 16 bits. */
1498 HOWTO (R_PPC64_TPREL16_HA,
1499 16, /* rightshift */
1500 1, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_dont, /* complain_on_overflow */
1505 ppc64_elf_unhandled_reloc, /* special_function */
1506 "R_PPC64_TPREL16_HA", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0xffff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Like TPREL16_HI, but next higher group of 16 bits. */
1513 HOWTO (R_PPC64_TPREL16_HIGHER,
1514 32, /* rightshift */
1515 1, /* size (0 = byte, 1 = short, 2 = long) */
1516 16, /* bitsize */
1517 FALSE, /* pc_relative */
1518 0, /* bitpos */
1519 complain_overflow_dont, /* complain_on_overflow */
1520 ppc64_elf_unhandled_reloc, /* special_function */
1521 "R_PPC64_TPREL16_HIGHER", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0xffff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1528 HOWTO (R_PPC64_TPREL16_HIGHERA,
1529 32, /* rightshift */
1530 1, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_dont, /* complain_on_overflow */
1535 ppc64_elf_unhandled_reloc, /* special_function */
1536 "R_PPC64_TPREL16_HIGHERA", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0xffff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1543 HOWTO (R_PPC64_TPREL16_HIGHEST,
1544 48, /* rightshift */
1545 1, /* size (0 = byte, 1 = short, 2 = long) */
1546 16, /* bitsize */
1547 FALSE, /* pc_relative */
1548 0, /* bitpos */
1549 complain_overflow_dont, /* complain_on_overflow */
1550 ppc64_elf_unhandled_reloc, /* special_function */
1551 "R_PPC64_TPREL16_HIGHEST", /* name */
1552 FALSE, /* partial_inplace */
1553 0, /* src_mask */
1554 0xffff, /* dst_mask */
1555 FALSE), /* pcrel_offset */
1556
1557 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1558 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1559 48, /* rightshift */
1560 1, /* size (0 = byte, 1 = short, 2 = long) */
1561 16, /* bitsize */
1562 FALSE, /* pc_relative */
1563 0, /* bitpos */
1564 complain_overflow_dont, /* complain_on_overflow */
1565 ppc64_elf_unhandled_reloc, /* special_function */
1566 "R_PPC64_TPREL16_HIGHESTA", /* name */
1567 FALSE, /* partial_inplace */
1568 0, /* src_mask */
1569 0xffff, /* dst_mask */
1570 FALSE), /* pcrel_offset */
1571
1572 /* Like TPREL16, but for insns with a DS field. */
1573 HOWTO (R_PPC64_TPREL16_DS,
1574 0, /* rightshift */
1575 1, /* size (0 = byte, 1 = short, 2 = long) */
1576 16, /* bitsize */
1577 FALSE, /* pc_relative */
1578 0, /* bitpos */
1579 complain_overflow_signed, /* complain_on_overflow */
1580 ppc64_elf_unhandled_reloc, /* special_function */
1581 "R_PPC64_TPREL16_DS", /* name */
1582 FALSE, /* partial_inplace */
1583 0, /* src_mask */
1584 0xfffc, /* dst_mask */
1585 FALSE), /* pcrel_offset */
1586
1587 /* Like TPREL16_DS, but no overflow. */
1588 HOWTO (R_PPC64_TPREL16_LO_DS,
1589 0, /* rightshift */
1590 1, /* size (0 = byte, 1 = short, 2 = long) */
1591 16, /* bitsize */
1592 FALSE, /* pc_relative */
1593 0, /* bitpos */
1594 complain_overflow_dont, /* complain_on_overflow */
1595 ppc64_elf_unhandled_reloc, /* special_function */
1596 "R_PPC64_TPREL16_LO_DS", /* name */
1597 FALSE, /* partial_inplace */
1598 0, /* src_mask */
1599 0xfffc, /* dst_mask */
1600 FALSE), /* pcrel_offset */
1601
1602 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1603 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1604 to the first entry relative to the TOC base (r2). */
1605 HOWTO (R_PPC64_GOT_TLSGD16,
1606 0, /* rightshift */
1607 1, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_signed, /* complain_on_overflow */
1612 ppc64_elf_unhandled_reloc, /* special_function */
1613 "R_PPC64_GOT_TLSGD16", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xffff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like GOT_TLSGD16, but no overflow. */
1620 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1621 0, /* rightshift */
1622 1, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc64_elf_unhandled_reloc, /* special_function */
1628 "R_PPC64_GOT_TLSGD16_LO", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xffff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1635 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1636 16, /* rightshift */
1637 1, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc64_elf_unhandled_reloc, /* special_function */
1643 "R_PPC64_GOT_TLSGD16_HI", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0xffff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1650 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1651 16, /* rightshift */
1652 1, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc64_elf_unhandled_reloc, /* special_function */
1658 "R_PPC64_GOT_TLSGD16_HA", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0xffff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1665 with values (sym+add)@dtpmod and zero, and computes the offset to the
1666 first entry relative to the TOC base (r2). */
1667 HOWTO (R_PPC64_GOT_TLSLD16,
1668 0, /* rightshift */
1669 1, /* size (0 = byte, 1 = short, 2 = long) */
1670 16, /* bitsize */
1671 FALSE, /* pc_relative */
1672 0, /* bitpos */
1673 complain_overflow_signed, /* complain_on_overflow */
1674 ppc64_elf_unhandled_reloc, /* special_function */
1675 "R_PPC64_GOT_TLSLD16", /* name */
1676 FALSE, /* partial_inplace */
1677 0, /* src_mask */
1678 0xffff, /* dst_mask */
1679 FALSE), /* pcrel_offset */
1680
1681 /* Like GOT_TLSLD16, but no overflow. */
1682 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1683 0, /* rightshift */
1684 1, /* size (0 = byte, 1 = short, 2 = long) */
1685 16, /* bitsize */
1686 FALSE, /* pc_relative */
1687 0, /* bitpos */
1688 complain_overflow_dont, /* complain_on_overflow */
1689 ppc64_elf_unhandled_reloc, /* special_function */
1690 "R_PPC64_GOT_TLSLD16_LO", /* name */
1691 FALSE, /* partial_inplace */
1692 0, /* src_mask */
1693 0xffff, /* dst_mask */
1694 FALSE), /* pcrel_offset */
1695
1696 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1697 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1698 16, /* rightshift */
1699 1, /* size (0 = byte, 1 = short, 2 = long) */
1700 16, /* bitsize */
1701 FALSE, /* pc_relative */
1702 0, /* bitpos */
1703 complain_overflow_dont, /* complain_on_overflow */
1704 ppc64_elf_unhandled_reloc, /* special_function */
1705 "R_PPC64_GOT_TLSLD16_HI", /* name */
1706 FALSE, /* partial_inplace */
1707 0, /* src_mask */
1708 0xffff, /* dst_mask */
1709 FALSE), /* pcrel_offset */
1710
1711 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1712 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1713 16, /* rightshift */
1714 1, /* size (0 = byte, 1 = short, 2 = long) */
1715 16, /* bitsize */
1716 FALSE, /* pc_relative */
1717 0, /* bitpos */
1718 complain_overflow_dont, /* complain_on_overflow */
1719 ppc64_elf_unhandled_reloc, /* special_function */
1720 "R_PPC64_GOT_TLSLD16_HA", /* name */
1721 FALSE, /* partial_inplace */
1722 0, /* src_mask */
1723 0xffff, /* dst_mask */
1724 FALSE), /* pcrel_offset */
1725
1726 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1727 the offset to the entry relative to the TOC base (r2). */
1728 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1729 0, /* rightshift */
1730 1, /* size (0 = byte, 1 = short, 2 = long) */
1731 16, /* bitsize */
1732 FALSE, /* pc_relative */
1733 0, /* bitpos */
1734 complain_overflow_signed, /* complain_on_overflow */
1735 ppc64_elf_unhandled_reloc, /* special_function */
1736 "R_PPC64_GOT_DTPREL16_DS", /* name */
1737 FALSE, /* partial_inplace */
1738 0, /* src_mask */
1739 0xfffc, /* dst_mask */
1740 FALSE), /* pcrel_offset */
1741
1742 /* Like GOT_DTPREL16_DS, but no overflow. */
1743 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1744 0, /* rightshift */
1745 1, /* size (0 = byte, 1 = short, 2 = long) */
1746 16, /* bitsize */
1747 FALSE, /* pc_relative */
1748 0, /* bitpos */
1749 complain_overflow_dont, /* complain_on_overflow */
1750 ppc64_elf_unhandled_reloc, /* special_function */
1751 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1752 FALSE, /* partial_inplace */
1753 0, /* src_mask */
1754 0xfffc, /* dst_mask */
1755 FALSE), /* pcrel_offset */
1756
1757 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1758 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1759 16, /* rightshift */
1760 1, /* size (0 = byte, 1 = short, 2 = long) */
1761 16, /* bitsize */
1762 FALSE, /* pc_relative */
1763 0, /* bitpos */
1764 complain_overflow_dont, /* complain_on_overflow */
1765 ppc64_elf_unhandled_reloc, /* special_function */
1766 "R_PPC64_GOT_DTPREL16_HI", /* name */
1767 FALSE, /* partial_inplace */
1768 0, /* src_mask */
1769 0xffff, /* dst_mask */
1770 FALSE), /* pcrel_offset */
1771
1772 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1773 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1774 16, /* rightshift */
1775 1, /* size (0 = byte, 1 = short, 2 = long) */
1776 16, /* bitsize */
1777 FALSE, /* pc_relative */
1778 0, /* bitpos */
1779 complain_overflow_dont, /* complain_on_overflow */
1780 ppc64_elf_unhandled_reloc, /* special_function */
1781 "R_PPC64_GOT_DTPREL16_HA", /* name */
1782 FALSE, /* partial_inplace */
1783 0, /* src_mask */
1784 0xffff, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1786
1787 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1788 offset to the entry relative to the TOC base (r2). */
1789 HOWTO (R_PPC64_GOT_TPREL16_DS,
1790 0, /* rightshift */
1791 1, /* size (0 = byte, 1 = short, 2 = long) */
1792 16, /* bitsize */
1793 FALSE, /* pc_relative */
1794 0, /* bitpos */
1795 complain_overflow_signed, /* complain_on_overflow */
1796 ppc64_elf_unhandled_reloc, /* special_function */
1797 "R_PPC64_GOT_TPREL16_DS", /* name */
1798 FALSE, /* partial_inplace */
1799 0, /* src_mask */
1800 0xfffc, /* dst_mask */
1801 FALSE), /* pcrel_offset */
1802
1803 /* Like GOT_TPREL16_DS, but no overflow. */
1804 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1805 0, /* rightshift */
1806 1, /* size (0 = byte, 1 = short, 2 = long) */
1807 16, /* bitsize */
1808 FALSE, /* pc_relative */
1809 0, /* bitpos */
1810 complain_overflow_dont, /* complain_on_overflow */
1811 ppc64_elf_unhandled_reloc, /* special_function */
1812 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1813 FALSE, /* partial_inplace */
1814 0, /* src_mask */
1815 0xfffc, /* dst_mask */
1816 FALSE), /* pcrel_offset */
1817
1818 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1819 HOWTO (R_PPC64_GOT_TPREL16_HI,
1820 16, /* rightshift */
1821 1, /* size (0 = byte, 1 = short, 2 = long) */
1822 16, /* bitsize */
1823 FALSE, /* pc_relative */
1824 0, /* bitpos */
1825 complain_overflow_dont, /* complain_on_overflow */
1826 ppc64_elf_unhandled_reloc, /* special_function */
1827 "R_PPC64_GOT_TPREL16_HI", /* name */
1828 FALSE, /* partial_inplace */
1829 0, /* src_mask */
1830 0xffff, /* dst_mask */
1831 FALSE), /* pcrel_offset */
1832
1833 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1834 HOWTO (R_PPC64_GOT_TPREL16_HA,
1835 16, /* rightshift */
1836 1, /* size (0 = byte, 1 = short, 2 = long) */
1837 16, /* bitsize */
1838 FALSE, /* pc_relative */
1839 0, /* bitpos */
1840 complain_overflow_dont, /* complain_on_overflow */
1841 ppc64_elf_unhandled_reloc, /* special_function */
1842 "R_PPC64_GOT_TPREL16_HA", /* name */
1843 FALSE, /* partial_inplace */
1844 0, /* src_mask */
1845 0xffff, /* dst_mask */
1846 FALSE), /* pcrel_offset */
1847
1848 /* GNU extension to record C++ vtable hierarchy. */
1849 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1850 0, /* rightshift */
1851 0, /* size (0 = byte, 1 = short, 2 = long) */
1852 0, /* bitsize */
1853 FALSE, /* pc_relative */
1854 0, /* bitpos */
1855 complain_overflow_dont, /* complain_on_overflow */
1856 NULL, /* special_function */
1857 "R_PPC64_GNU_VTINHERIT", /* name */
1858 FALSE, /* partial_inplace */
1859 0, /* src_mask */
1860 0, /* dst_mask */
1861 FALSE), /* pcrel_offset */
1862
1863 /* GNU extension to record C++ vtable member usage. */
1864 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1865 0, /* rightshift */
1866 0, /* size (0 = byte, 1 = short, 2 = long) */
1867 0, /* bitsize */
1868 FALSE, /* pc_relative */
1869 0, /* bitpos */
1870 complain_overflow_dont, /* complain_on_overflow */
1871 NULL, /* special_function */
1872 "R_PPC64_GNU_VTENTRY", /* name */
1873 FALSE, /* partial_inplace */
1874 0, /* src_mask */
1875 0, /* dst_mask */
1876 FALSE), /* pcrel_offset */
1877 };
1878
1879 \f
1880 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
1881 be done. */
1882
1883 static void
1884 ppc_howto_init (void)
1885 {
1886 unsigned int i, type;
1887
1888 for (i = 0;
1889 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
1890 i++)
1891 {
1892 type = ppc64_elf_howto_raw[i].type;
1893 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
1894 / sizeof (ppc64_elf_howto_table[0])));
1895 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
1896 }
1897 }
1898
1899 static reloc_howto_type *
1900 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1901 bfd_reloc_code_real_type code)
1902 {
1903 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
1904
1905 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
1906 /* Initialize howto table if needed. */
1907 ppc_howto_init ();
1908
1909 switch (code)
1910 {
1911 default:
1912 return NULL;
1913
1914 case BFD_RELOC_NONE: r = R_PPC64_NONE;
1915 break;
1916 case BFD_RELOC_32: r = R_PPC64_ADDR32;
1917 break;
1918 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
1919 break;
1920 case BFD_RELOC_16: r = R_PPC64_ADDR16;
1921 break;
1922 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
1923 break;
1924 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
1925 break;
1926 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
1927 break;
1928 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
1929 break;
1930 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
1931 break;
1932 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
1933 break;
1934 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
1935 break;
1936 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
1937 break;
1938 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
1939 break;
1940 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
1941 break;
1942 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
1943 break;
1944 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
1945 break;
1946 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
1947 break;
1948 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
1949 break;
1950 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
1951 break;
1952 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
1953 break;
1954 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
1955 break;
1956 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
1957 break;
1958 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
1959 break;
1960 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
1961 break;
1962 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
1963 break;
1964 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
1965 break;
1966 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
1967 break;
1968 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
1969 break;
1970 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
1971 break;
1972 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
1973 break;
1974 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
1975 break;
1976 case BFD_RELOC_64: r = R_PPC64_ADDR64;
1977 break;
1978 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
1979 break;
1980 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
1981 break;
1982 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
1983 break;
1984 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
1985 break;
1986 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
1987 break;
1988 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
1989 break;
1990 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
1991 break;
1992 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
1993 break;
1994 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
1995 break;
1996 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
1997 break;
1998 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
1999 break;
2000 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2001 break;
2002 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2003 break;
2004 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2005 break;
2006 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2007 break;
2008 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2009 break;
2010 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2011 break;
2012 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2013 break;
2014 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2015 break;
2016 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2017 break;
2018 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2019 break;
2020 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2021 break;
2022 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2023 break;
2024 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2025 break;
2026 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2027 break;
2028 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2029 break;
2030 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2031 break;
2032 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2033 break;
2034 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2035 break;
2036 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2037 break;
2038 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2039 break;
2040 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2041 break;
2042 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2043 break;
2044 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2045 break;
2046 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2047 break;
2048 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2049 break;
2050 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2051 break;
2052 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2053 break;
2054 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2055 break;
2056 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2057 break;
2058 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2059 break;
2060 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2061 break;
2062 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2063 break;
2064 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2065 break;
2066 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2067 break;
2068 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2069 break;
2070 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2071 break;
2072 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2073 break;
2074 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2075 break;
2076 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2077 break;
2078 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2079 break;
2080 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2081 break;
2082 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2083 break;
2084 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2085 break;
2086 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2087 break;
2088 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2089 break;
2090 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2091 break;
2092 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2093 break;
2094 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2095 break;
2096 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2097 break;
2098 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2099 break;
2100 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2101 break;
2102 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2103 break;
2104 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2105 break;
2106 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2107 break;
2108 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2109 break;
2110 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2111 break;
2112 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2113 break;
2114 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2115 break;
2116 }
2117
2118 return ppc64_elf_howto_table[r];
2119 };
2120
2121 static reloc_howto_type *
2122 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2123 const char *r_name)
2124 {
2125 unsigned int i;
2126
2127 for (i = 0;
2128 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2129 i++)
2130 if (ppc64_elf_howto_raw[i].name != NULL
2131 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2132 return &ppc64_elf_howto_raw[i];
2133
2134 return NULL;
2135 }
2136
2137 /* Set the howto pointer for a PowerPC ELF reloc. */
2138
2139 static void
2140 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2141 Elf_Internal_Rela *dst)
2142 {
2143 unsigned int type;
2144
2145 /* Initialize howto table if needed. */
2146 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2147 ppc_howto_init ();
2148
2149 type = ELF64_R_TYPE (dst->r_info);
2150 if (type >= (sizeof (ppc64_elf_howto_table)
2151 / sizeof (ppc64_elf_howto_table[0])))
2152 {
2153 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2154 abfd, (int) type);
2155 type = R_PPC64_NONE;
2156 }
2157 cache_ptr->howto = ppc64_elf_howto_table[type];
2158 }
2159
2160 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2161
2162 static bfd_reloc_status_type
2163 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2164 void *data, asection *input_section,
2165 bfd *output_bfd, char **error_message)
2166 {
2167 /* If this is a relocatable link (output_bfd test tells us), just
2168 call the generic function. Any adjustment will be done at final
2169 link time. */
2170 if (output_bfd != NULL)
2171 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2172 input_section, output_bfd, error_message);
2173
2174 /* Adjust the addend for sign extension of the low 16 bits.
2175 We won't actually be using the low 16 bits, so trashing them
2176 doesn't matter. */
2177 reloc_entry->addend += 0x8000;
2178 return bfd_reloc_continue;
2179 }
2180
2181 static bfd_reloc_status_type
2182 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2183 void *data, asection *input_section,
2184 bfd *output_bfd, char **error_message)
2185 {
2186 if (output_bfd != NULL)
2187 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2188 input_section, output_bfd, error_message);
2189
2190 if (strcmp (symbol->section->name, ".opd") == 0
2191 && (symbol->section->owner->flags & DYNAMIC) == 0)
2192 {
2193 bfd_vma dest = opd_entry_value (symbol->section,
2194 symbol->value + reloc_entry->addend,
2195 NULL, NULL);
2196 if (dest != (bfd_vma) -1)
2197 reloc_entry->addend = dest - (symbol->value
2198 + symbol->section->output_section->vma
2199 + symbol->section->output_offset);
2200 }
2201 return bfd_reloc_continue;
2202 }
2203
2204 static bfd_reloc_status_type
2205 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2206 void *data, asection *input_section,
2207 bfd *output_bfd, char **error_message)
2208 {
2209 long insn;
2210 enum elf_ppc64_reloc_type r_type;
2211 bfd_size_type octets;
2212 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2213 bfd_boolean is_power4 = FALSE;
2214
2215 /* If this is a relocatable link (output_bfd test tells us), just
2216 call the generic function. Any adjustment will be done at final
2217 link time. */
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 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2223 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2224 insn &= ~(0x01 << 21);
2225 r_type = reloc_entry->howto->type;
2226 if (r_type == R_PPC64_ADDR14_BRTAKEN
2227 || r_type == R_PPC64_REL14_BRTAKEN)
2228 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2229
2230 if (is_power4)
2231 {
2232 /* Set 'a' bit. This is 0b00010 in BO field for branch
2233 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2234 for branch on CTR insns (BO == 1a00t or 1a01t). */
2235 if ((insn & (0x14 << 21)) == (0x04 << 21))
2236 insn |= 0x02 << 21;
2237 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2238 insn |= 0x08 << 21;
2239 else
2240 goto out;
2241 }
2242 else
2243 {
2244 bfd_vma target = 0;
2245 bfd_vma from;
2246
2247 if (!bfd_is_com_section (symbol->section))
2248 target = symbol->value;
2249 target += symbol->section->output_section->vma;
2250 target += symbol->section->output_offset;
2251 target += reloc_entry->addend;
2252
2253 from = (reloc_entry->address
2254 + input_section->output_offset
2255 + input_section->output_section->vma);
2256
2257 /* Invert 'y' bit if not the default. */
2258 if ((bfd_signed_vma) (target - from) < 0)
2259 insn ^= 0x01 << 21;
2260 }
2261 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2262 out:
2263 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2264 input_section, output_bfd, error_message);
2265 }
2266
2267 static bfd_reloc_status_type
2268 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2269 void *data, asection *input_section,
2270 bfd *output_bfd, char **error_message)
2271 {
2272 /* If this is a relocatable link (output_bfd test tells us), just
2273 call the generic function. Any adjustment will be done at final
2274 link time. */
2275 if (output_bfd != NULL)
2276 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2277 input_section, output_bfd, error_message);
2278
2279 /* Subtract the symbol section base address. */
2280 reloc_entry->addend -= symbol->section->output_section->vma;
2281 return bfd_reloc_continue;
2282 }
2283
2284 static bfd_reloc_status_type
2285 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2286 void *data, asection *input_section,
2287 bfd *output_bfd, char **error_message)
2288 {
2289 /* If this is a relocatable link (output_bfd test tells us), just
2290 call the generic function. Any adjustment will be done at final
2291 link time. */
2292 if (output_bfd != NULL)
2293 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2294 input_section, output_bfd, error_message);
2295
2296 /* Subtract the symbol section base address. */
2297 reloc_entry->addend -= symbol->section->output_section->vma;
2298
2299 /* Adjust the addend for sign extension of the low 16 bits. */
2300 reloc_entry->addend += 0x8000;
2301 return bfd_reloc_continue;
2302 }
2303
2304 static bfd_reloc_status_type
2305 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2306 void *data, asection *input_section,
2307 bfd *output_bfd, char **error_message)
2308 {
2309 bfd_vma TOCstart;
2310
2311 /* If this is a relocatable link (output_bfd test tells us), just
2312 call the generic function. Any adjustment will be done at final
2313 link time. */
2314 if (output_bfd != NULL)
2315 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2316 input_section, output_bfd, error_message);
2317
2318 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2319 if (TOCstart == 0)
2320 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2321
2322 /* Subtract the TOC base address. */
2323 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2324 return bfd_reloc_continue;
2325 }
2326
2327 static bfd_reloc_status_type
2328 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2329 void *data, asection *input_section,
2330 bfd *output_bfd, char **error_message)
2331 {
2332 bfd_vma TOCstart;
2333
2334 /* If this is a relocatable link (output_bfd test tells us), just
2335 call the generic function. Any adjustment will be done at final
2336 link time. */
2337 if (output_bfd != NULL)
2338 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2339 input_section, output_bfd, error_message);
2340
2341 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2342 if (TOCstart == 0)
2343 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2344
2345 /* Subtract the TOC base address. */
2346 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2347
2348 /* Adjust the addend for sign extension of the low 16 bits. */
2349 reloc_entry->addend += 0x8000;
2350 return bfd_reloc_continue;
2351 }
2352
2353 static bfd_reloc_status_type
2354 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2355 void *data, asection *input_section,
2356 bfd *output_bfd, char **error_message)
2357 {
2358 bfd_vma TOCstart;
2359 bfd_size_type octets;
2360
2361 /* If this is a relocatable link (output_bfd test tells us), just
2362 call the generic function. Any adjustment will be done at final
2363 link time. */
2364 if (output_bfd != NULL)
2365 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2366 input_section, output_bfd, error_message);
2367
2368 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2369 if (TOCstart == 0)
2370 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2371
2372 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2373 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2374 return bfd_reloc_ok;
2375 }
2376
2377 static bfd_reloc_status_type
2378 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2379 void *data, asection *input_section,
2380 bfd *output_bfd, char **error_message)
2381 {
2382 /* If this is a relocatable link (output_bfd test tells us), just
2383 call the generic function. Any adjustment will be done at final
2384 link time. */
2385 if (output_bfd != NULL)
2386 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2387 input_section, output_bfd, error_message);
2388
2389 if (error_message != NULL)
2390 {
2391 static char buf[60];
2392 sprintf (buf, "generic linker can't handle %s",
2393 reloc_entry->howto->name);
2394 *error_message = buf;
2395 }
2396 return bfd_reloc_dangerous;
2397 }
2398
2399 struct ppc64_elf_obj_tdata
2400 {
2401 struct elf_obj_tdata elf;
2402
2403 /* Shortcuts to dynamic linker sections. */
2404 asection *got;
2405 asection *relgot;
2406
2407 /* Used during garbage collection. We attach global symbols defined
2408 on removed .opd entries to this section so that the sym is removed. */
2409 asection *deleted_section;
2410
2411 /* TLS local dynamic got entry handling. Suppose for multiple GOT
2412 sections means we potentially need one of these for each input bfd. */
2413 union {
2414 bfd_signed_vma refcount;
2415 bfd_vma offset;
2416 } tlsld_got;
2417
2418 /* A copy of relocs before they are modified for --emit-relocs. */
2419 Elf_Internal_Rela *opd_relocs;
2420 };
2421
2422 #define ppc64_elf_tdata(bfd) \
2423 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2424
2425 #define ppc64_tlsld_got(bfd) \
2426 (&ppc64_elf_tdata (bfd)->tlsld_got)
2427
2428 #define is_ppc64_elf(bfd) \
2429 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2430 && elf_object_id (bfd) == PPC64_ELF_TDATA)
2431
2432 /* Override the generic function because we store some extras. */
2433
2434 static bfd_boolean
2435 ppc64_elf_mkobject (bfd *abfd)
2436 {
2437 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2438 PPC64_ELF_TDATA);
2439 }
2440
2441 /* Fix bad default arch selected for a 64 bit input bfd when the
2442 default is 32 bit. */
2443
2444 static bfd_boolean
2445 ppc64_elf_object_p (bfd *abfd)
2446 {
2447 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2448 {
2449 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2450
2451 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2452 {
2453 /* Relies on arch after 32 bit default being 64 bit default. */
2454 abfd->arch_info = abfd->arch_info->next;
2455 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2456 }
2457 }
2458 return TRUE;
2459 }
2460
2461 /* Support for core dump NOTE sections. */
2462
2463 static bfd_boolean
2464 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2465 {
2466 size_t offset, size;
2467
2468 if (note->descsz != 504)
2469 return FALSE;
2470
2471 /* pr_cursig */
2472 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2473
2474 /* pr_pid */
2475 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32);
2476
2477 /* pr_reg */
2478 offset = 112;
2479 size = 384;
2480
2481 /* Make a ".reg/999" section. */
2482 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2483 size, note->descpos + offset);
2484 }
2485
2486 static bfd_boolean
2487 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2488 {
2489 if (note->descsz != 136)
2490 return FALSE;
2491
2492 elf_tdata (abfd)->core_program
2493 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2494 elf_tdata (abfd)->core_command
2495 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2496
2497 return TRUE;
2498 }
2499
2500 static char *
2501 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2502 ...)
2503 {
2504 switch (note_type)
2505 {
2506 default:
2507 return NULL;
2508
2509 case NT_PRPSINFO:
2510 {
2511 char data[136];
2512 va_list ap;
2513
2514 va_start (ap, note_type);
2515 memset (data, 0, 40);
2516 strncpy (data + 40, va_arg (ap, const char *), 16);
2517 strncpy (data + 56, va_arg (ap, const char *), 80);
2518 va_end (ap);
2519 return elfcore_write_note (abfd, buf, bufsiz,
2520 "CORE", note_type, data, sizeof (data));
2521 }
2522
2523 case NT_PRSTATUS:
2524 {
2525 char data[504];
2526 va_list ap;
2527 long pid;
2528 int cursig;
2529 const void *greg;
2530
2531 va_start (ap, note_type);
2532 memset (data, 0, 112);
2533 pid = va_arg (ap, long);
2534 bfd_put_32 (abfd, pid, data + 32);
2535 cursig = va_arg (ap, int);
2536 bfd_put_16 (abfd, cursig, data + 12);
2537 greg = va_arg (ap, const void *);
2538 memcpy (data + 112, greg, 384);
2539 memset (data + 496, 0, 8);
2540 va_end (ap);
2541 return elfcore_write_note (abfd, buf, bufsiz,
2542 "CORE", note_type, data, sizeof (data));
2543 }
2544 }
2545 }
2546
2547 /* Merge backend specific data from an object file to the output
2548 object file when linking. */
2549
2550 static bfd_boolean
2551 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2552 {
2553 /* Check if we have the same endianess. */
2554 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
2555 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
2556 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
2557 {
2558 const char *msg;
2559
2560 if (bfd_big_endian (ibfd))
2561 msg = _("%B: compiled for a big endian system "
2562 "and target is little endian");
2563 else
2564 msg = _("%B: compiled for a little endian system "
2565 "and target is big endian");
2566
2567 (*_bfd_error_handler) (msg, ibfd);
2568
2569 bfd_set_error (bfd_error_wrong_format);
2570 return FALSE;
2571 }
2572
2573 return TRUE;
2574 }
2575
2576 /* Add extra PPC sections. */
2577
2578 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2579 {
2580 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2581 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2582 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2583 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2584 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2585 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2586 { NULL, 0, 0, 0, 0 }
2587 };
2588
2589 enum _ppc64_sec_type {
2590 sec_normal = 0,
2591 sec_opd = 1,
2592 sec_toc = 2
2593 };
2594
2595 struct _ppc64_elf_section_data
2596 {
2597 struct bfd_elf_section_data elf;
2598
2599 union
2600 {
2601 /* An array with one entry for each opd function descriptor. */
2602 struct _opd_sec_data
2603 {
2604 /* Points to the function code section for local opd entries. */
2605 asection **func_sec;
2606
2607 /* After editing .opd, adjust references to opd local syms. */
2608 long *adjust;
2609 } opd;
2610
2611 /* An array for toc sections, indexed by offset/8.
2612 Specifies the relocation symbol index used at a given toc offset. */
2613 unsigned *t_symndx;
2614 } u;
2615
2616 enum _ppc64_sec_type sec_type:2;
2617
2618 /* Flag set when small branches are detected. Used to
2619 select suitable defaults for the stub group size. */
2620 unsigned int has_14bit_branch:1;
2621 };
2622
2623 #define ppc64_elf_section_data(sec) \
2624 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2625
2626 static bfd_boolean
2627 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2628 {
2629 if (!sec->used_by_bfd)
2630 {
2631 struct _ppc64_elf_section_data *sdata;
2632 bfd_size_type amt = sizeof (*sdata);
2633
2634 sdata = bfd_zalloc (abfd, amt);
2635 if (sdata == NULL)
2636 return FALSE;
2637 sec->used_by_bfd = sdata;
2638 }
2639
2640 return _bfd_elf_new_section_hook (abfd, sec);
2641 }
2642
2643 static struct _opd_sec_data *
2644 get_opd_info (asection * sec)
2645 {
2646 if (sec != NULL
2647 && ppc64_elf_section_data (sec) != NULL
2648 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2649 return &ppc64_elf_section_data (sec)->u.opd;
2650 return NULL;
2651 }
2652 \f
2653 /* Parameters for the qsort hook. */
2654 static asection *synthetic_opd;
2655 static bfd_boolean synthetic_relocatable;
2656
2657 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2658
2659 static int
2660 compare_symbols (const void *ap, const void *bp)
2661 {
2662 const asymbol *a = * (const asymbol **) ap;
2663 const asymbol *b = * (const asymbol **) bp;
2664
2665 /* Section symbols first. */
2666 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2667 return -1;
2668 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2669 return 1;
2670
2671 /* then .opd symbols. */
2672 if (a->section == synthetic_opd && b->section != synthetic_opd)
2673 return -1;
2674 if (a->section != synthetic_opd && b->section == synthetic_opd)
2675 return 1;
2676
2677 /* then other code symbols. */
2678 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2679 == (SEC_CODE | SEC_ALLOC)
2680 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2681 != (SEC_CODE | SEC_ALLOC))
2682 return -1;
2683
2684 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2685 != (SEC_CODE | SEC_ALLOC)
2686 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2687 == (SEC_CODE | SEC_ALLOC))
2688 return 1;
2689
2690 if (synthetic_relocatable)
2691 {
2692 if (a->section->id < b->section->id)
2693 return -1;
2694
2695 if (a->section->id > b->section->id)
2696 return 1;
2697 }
2698
2699 if (a->value + a->section->vma < b->value + b->section->vma)
2700 return -1;
2701
2702 if (a->value + a->section->vma > b->value + b->section->vma)
2703 return 1;
2704
2705 /* For syms with the same value, prefer strong dynamic global function
2706 syms over other syms. */
2707 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2708 return -1;
2709
2710 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2711 return 1;
2712
2713 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2714 return -1;
2715
2716 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2717 return 1;
2718
2719 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2720 return -1;
2721
2722 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2723 return 1;
2724
2725 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2726 return -1;
2727
2728 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2729 return 1;
2730
2731 return 0;
2732 }
2733
2734 /* Search SYMS for a symbol of the given VALUE. */
2735
2736 static asymbol *
2737 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2738 {
2739 long mid;
2740
2741 if (id == -1)
2742 {
2743 while (lo < hi)
2744 {
2745 mid = (lo + hi) >> 1;
2746 if (syms[mid]->value + syms[mid]->section->vma < value)
2747 lo = mid + 1;
2748 else if (syms[mid]->value + syms[mid]->section->vma > value)
2749 hi = mid;
2750 else
2751 return syms[mid];
2752 }
2753 }
2754 else
2755 {
2756 while (lo < hi)
2757 {
2758 mid = (lo + hi) >> 1;
2759 if (syms[mid]->section->id < id)
2760 lo = mid + 1;
2761 else if (syms[mid]->section->id > id)
2762 hi = mid;
2763 else if (syms[mid]->value < value)
2764 lo = mid + 1;
2765 else if (syms[mid]->value > value)
2766 hi = mid;
2767 else
2768 return syms[mid];
2769 }
2770 }
2771 return NULL;
2772 }
2773
2774 static bfd_boolean
2775 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2776 {
2777 bfd_vma vma = *(bfd_vma *) ptr;
2778 return ((section->flags & SEC_ALLOC) != 0
2779 && section->vma <= vma
2780 && vma < section->vma + section->size);
2781 }
2782
2783 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2784 entry syms. Also generate @plt symbols for the glink branch table. */
2785
2786 static long
2787 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2788 long static_count, asymbol **static_syms,
2789 long dyn_count, asymbol **dyn_syms,
2790 asymbol **ret)
2791 {
2792 asymbol *s;
2793 long i;
2794 long count;
2795 char *names;
2796 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2797 asection *opd;
2798 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2799 asymbol **syms;
2800
2801 *ret = NULL;
2802
2803 opd = bfd_get_section_by_name (abfd, ".opd");
2804 if (opd == NULL)
2805 return 0;
2806
2807 symcount = static_count;
2808 if (!relocatable)
2809 symcount += dyn_count;
2810 if (symcount == 0)
2811 return 0;
2812
2813 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2814 if (syms == NULL)
2815 return -1;
2816
2817 if (!relocatable && static_count != 0 && dyn_count != 0)
2818 {
2819 /* Use both symbol tables. */
2820 memcpy (syms, static_syms, static_count * sizeof (*syms));
2821 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2822 }
2823 else if (!relocatable && static_count == 0)
2824 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2825 else
2826 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2827
2828 synthetic_opd = opd;
2829 synthetic_relocatable = relocatable;
2830 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2831
2832 if (!relocatable && symcount > 1)
2833 {
2834 long j;
2835 /* Trim duplicate syms, since we may have merged the normal and
2836 dynamic symbols. Actually, we only care about syms that have
2837 different values, so trim any with the same value. */
2838 for (i = 1, j = 1; i < symcount; ++i)
2839 if (syms[i - 1]->value + syms[i - 1]->section->vma
2840 != syms[i]->value + syms[i]->section->vma)
2841 syms[j++] = syms[i];
2842 symcount = j;
2843 }
2844
2845 i = 0;
2846 if (syms[i]->section == opd)
2847 ++i;
2848 codesecsym = i;
2849
2850 for (; i < symcount; ++i)
2851 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2852 != (SEC_CODE | SEC_ALLOC))
2853 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
2854 break;
2855 codesecsymend = i;
2856
2857 for (; i < symcount; ++i)
2858 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
2859 break;
2860 secsymend = i;
2861
2862 for (; i < symcount; ++i)
2863 if (syms[i]->section != opd)
2864 break;
2865 opdsymend = i;
2866
2867 for (; i < symcount; ++i)
2868 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2869 != (SEC_CODE | SEC_ALLOC))
2870 break;
2871 symcount = i;
2872
2873 count = 0;
2874
2875 if (relocatable)
2876 {
2877 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2878 arelent *r;
2879 size_t size;
2880 long relcount;
2881
2882 if (opdsymend == secsymend)
2883 goto done;
2884
2885 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2886 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
2887 if (relcount == 0)
2888 goto done;
2889
2890 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
2891 {
2892 count = -1;
2893 goto done;
2894 }
2895
2896 size = 0;
2897 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2898 {
2899 asymbol *sym;
2900
2901 while (r < opd->relocation + relcount
2902 && r->address < syms[i]->value + opd->vma)
2903 ++r;
2904
2905 if (r == opd->relocation + relcount)
2906 break;
2907
2908 if (r->address != syms[i]->value + opd->vma)
2909 continue;
2910
2911 if (r->howto->type != R_PPC64_ADDR64)
2912 continue;
2913
2914 sym = *r->sym_ptr_ptr;
2915 if (!sym_exists_at (syms, opdsymend, symcount,
2916 sym->section->id, sym->value + r->addend))
2917 {
2918 ++count;
2919 size += sizeof (asymbol);
2920 size += strlen (syms[i]->name) + 2;
2921 }
2922 }
2923
2924 s = *ret = bfd_malloc (size);
2925 if (s == NULL)
2926 {
2927 count = -1;
2928 goto done;
2929 }
2930
2931 names = (char *) (s + count);
2932
2933 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
2934 {
2935 asymbol *sym;
2936
2937 while (r < opd->relocation + relcount
2938 && r->address < syms[i]->value + opd->vma)
2939 ++r;
2940
2941 if (r == opd->relocation + relcount)
2942 break;
2943
2944 if (r->address != syms[i]->value + opd->vma)
2945 continue;
2946
2947 if (r->howto->type != R_PPC64_ADDR64)
2948 continue;
2949
2950 sym = *r->sym_ptr_ptr;
2951 if (!sym_exists_at (syms, opdsymend, symcount,
2952 sym->section->id, sym->value + r->addend))
2953 {
2954 size_t len;
2955
2956 *s = *syms[i];
2957 s->flags |= BSF_SYNTHETIC;
2958 s->section = sym->section;
2959 s->value = sym->value + r->addend;
2960 s->name = names;
2961 *names++ = '.';
2962 len = strlen (syms[i]->name);
2963 memcpy (names, syms[i]->name, len + 1);
2964 names += len + 1;
2965 /* Have udata.p point back to the original symbol this
2966 synthetic symbol was derived from. */
2967 s->udata.p = syms[i];
2968 s++;
2969 }
2970 }
2971 }
2972 else
2973 {
2974 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2975 bfd_byte *contents;
2976 size_t size;
2977 long plt_count = 0;
2978 bfd_vma glink_vma = 0, resolv_vma = 0;
2979 asection *dynamic, *glink = NULL, *relplt = NULL;
2980 arelent *p;
2981
2982 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
2983 {
2984 if (contents)
2985 {
2986 free_contents_and_exit:
2987 free (contents);
2988 }
2989 count = -1;
2990 goto done;
2991 }
2992
2993 size = 0;
2994 for (i = secsymend; i < opdsymend; ++i)
2995 {
2996 bfd_vma ent;
2997
2998 ent = bfd_get_64 (abfd, contents + syms[i]->value);
2999 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3000 {
3001 ++count;
3002 size += sizeof (asymbol);
3003 size += strlen (syms[i]->name) + 2;
3004 }
3005 }
3006
3007 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3008 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
3009 if (dynamic != NULL)
3010 {
3011 bfd_byte *dynbuf, *extdyn, *extdynend;
3012 size_t extdynsize;
3013 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3014
3015 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3016 goto free_contents_and_exit;
3017
3018 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3019 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3020
3021 extdyn = dynbuf;
3022 extdynend = extdyn + dynamic->size;
3023 for (; extdyn < extdynend; extdyn += extdynsize)
3024 {
3025 Elf_Internal_Dyn dyn;
3026 (*swap_dyn_in) (abfd, extdyn, &dyn);
3027
3028 if (dyn.d_tag == DT_NULL)
3029 break;
3030
3031 if (dyn.d_tag == DT_PPC64_GLINK)
3032 {
3033 /* The first glink stub starts at offset 32; see comment in
3034 ppc64_elf_finish_dynamic_sections. */
3035 glink_vma = dyn.d_un.d_val + 32;
3036 /* The .glink section usually does not survive the final
3037 link; search for the section (usually .text) where the
3038 glink stubs now reside. */
3039 glink = bfd_sections_find_if (abfd, section_covers_vma,
3040 &glink_vma);
3041 break;
3042 }
3043 }
3044
3045 free (dynbuf);
3046 }
3047
3048 if (glink != NULL)
3049 {
3050 /* Determine __glink trampoline by reading the relative branch
3051 from the first glink stub. */
3052 bfd_byte buf[4];
3053 if (bfd_get_section_contents (abfd, glink, buf,
3054 glink_vma + 4 - glink->vma, 4))
3055 {
3056 unsigned int insn = bfd_get_32 (abfd, buf);
3057 insn ^= B_DOT;
3058 if ((insn & ~0x3fffffc) == 0)
3059 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3060 }
3061
3062 if (resolv_vma)
3063 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3064 }
3065
3066 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3067 if (glink != NULL && relplt != NULL)
3068 {
3069 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3070 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3071 goto free_contents_and_exit;
3072
3073 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3074 size += plt_count * sizeof (asymbol);
3075
3076 p = relplt->relocation;
3077 for (i = 0; i < plt_count; i++, p++)
3078 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3079 }
3080
3081 s = *ret = bfd_malloc (size);
3082 if (s == NULL)
3083 goto free_contents_and_exit;
3084
3085 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3086
3087 for (i = secsymend; i < opdsymend; ++i)
3088 {
3089 bfd_vma ent;
3090
3091 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3092 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3093 {
3094 long lo, hi;
3095 size_t len;
3096 asection *sec = abfd->sections;
3097
3098 *s = *syms[i];
3099 lo = codesecsym;
3100 hi = codesecsymend;
3101 while (lo < hi)
3102 {
3103 long mid = (lo + hi) >> 1;
3104 if (syms[mid]->section->vma < ent)
3105 lo = mid + 1;
3106 else if (syms[mid]->section->vma > ent)
3107 hi = mid;
3108 else
3109 {
3110 sec = syms[mid]->section;
3111 break;
3112 }
3113 }
3114
3115 if (lo >= hi && lo > codesecsym)
3116 sec = syms[lo - 1]->section;
3117
3118 for (; sec != NULL; sec = sec->next)
3119 {
3120 if (sec->vma > ent)
3121 break;
3122 if ((sec->flags & SEC_ALLOC) == 0
3123 || (sec->flags & SEC_LOAD) == 0)
3124 break;
3125 if ((sec->flags & SEC_CODE) != 0)
3126 s->section = sec;
3127 }
3128 s->flags |= BSF_SYNTHETIC;
3129 s->value = ent - s->section->vma;
3130 s->name = names;
3131 *names++ = '.';
3132 len = strlen (syms[i]->name);
3133 memcpy (names, syms[i]->name, len + 1);
3134 names += len + 1;
3135 /* Have udata.p point back to the original symbol this
3136 synthetic symbol was derived from. */
3137 s->udata.p = syms[i];
3138 s++;
3139 }
3140 }
3141 free (contents);
3142
3143 if (glink != NULL && relplt != NULL)
3144 {
3145 if (resolv_vma)
3146 {
3147 /* Add a symbol for the main glink trampoline. */
3148 memset (s, 0, sizeof *s);
3149 s->the_bfd = abfd;
3150 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3151 s->section = glink;
3152 s->value = resolv_vma - glink->vma;
3153 s->name = names;
3154 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3155 names += sizeof ("__glink_PLTresolve");
3156 s++;
3157 count++;
3158 }
3159
3160 /* FIXME: It would be very much nicer to put sym@plt on the
3161 stub rather than on the glink branch table entry. The
3162 objdump disassembler would then use a sensible symbol
3163 name on plt calls. The difficulty in doing so is
3164 a) finding the stubs, and,
3165 b) matching stubs against plt entries, and,
3166 c) there can be multiple stubs for a given plt entry.
3167
3168 Solving (a) could be done by code scanning, but older
3169 ppc64 binaries used different stubs to current code.
3170 (b) is the tricky one since you need to known the toc
3171 pointer for at least one function that uses a pic stub to
3172 be able to calculate the plt address referenced.
3173 (c) means gdb would need to set multiple breakpoints (or
3174 find the glink branch itself) when setting breakpoints
3175 for pending shared library loads. */
3176 p = relplt->relocation;
3177 for (i = 0; i < plt_count; i++, p++)
3178 {
3179 size_t len;
3180
3181 *s = **p->sym_ptr_ptr;
3182 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3183 we are defining a symbol, ensure one of them is set. */
3184 if ((s->flags & BSF_LOCAL) == 0)
3185 s->flags |= BSF_GLOBAL;
3186 s->flags |= BSF_SYNTHETIC;
3187 s->section = glink;
3188 s->value = glink_vma - glink->vma;
3189 s->name = names;
3190 s->udata.p = NULL;
3191 len = strlen ((*p->sym_ptr_ptr)->name);
3192 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3193 names += len;
3194 memcpy (names, "@plt", sizeof ("@plt"));
3195 names += sizeof ("@plt");
3196 s++;
3197 glink_vma += 8;
3198 if (i >= 0x8000)
3199 glink_vma += 4;
3200 }
3201 count += plt_count;
3202 }
3203 }
3204
3205 done:
3206 free (syms);
3207 return count;
3208 }
3209 \f
3210 /* The following functions are specific to the ELF linker, while
3211 functions above are used generally. Those named ppc64_elf_* are
3212 called by the main ELF linker code. They appear in this file more
3213 or less in the order in which they are called. eg.
3214 ppc64_elf_check_relocs is called early in the link process,
3215 ppc64_elf_finish_dynamic_sections is one of the last functions
3216 called.
3217
3218 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3219 functions have both a function code symbol and a function descriptor
3220 symbol. A call to foo in a relocatable object file looks like:
3221
3222 . .text
3223 . x:
3224 . bl .foo
3225 . nop
3226
3227 The function definition in another object file might be:
3228
3229 . .section .opd
3230 . foo: .quad .foo
3231 . .quad .TOC.@tocbase
3232 . .quad 0
3233 .
3234 . .text
3235 . .foo: blr
3236
3237 When the linker resolves the call during a static link, the branch
3238 unsurprisingly just goes to .foo and the .opd information is unused.
3239 If the function definition is in a shared library, things are a little
3240 different: The call goes via a plt call stub, the opd information gets
3241 copied to the plt, and the linker patches the nop.
3242
3243 . x:
3244 . bl .foo_stub
3245 . ld 2,40(1)
3246 .
3247 .
3248 . .foo_stub:
3249 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3250 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3251 . std 2,40(1) # this is the general idea
3252 . ld 11,0(12)
3253 . ld 2,8(12)
3254 . mtctr 11
3255 . ld 11,16(12)
3256 . bctr
3257 .
3258 . .section .plt
3259 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3260
3261 The "reloc ()" notation is supposed to indicate that the linker emits
3262 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3263 copying.
3264
3265 What are the difficulties here? Well, firstly, the relocations
3266 examined by the linker in check_relocs are against the function code
3267 sym .foo, while the dynamic relocation in the plt is emitted against
3268 the function descriptor symbol, foo. Somewhere along the line, we need
3269 to carefully copy dynamic link information from one symbol to the other.
3270 Secondly, the generic part of the elf linker will make .foo a dynamic
3271 symbol as is normal for most other backends. We need foo dynamic
3272 instead, at least for an application final link. However, when
3273 creating a shared library containing foo, we need to have both symbols
3274 dynamic so that references to .foo are satisfied during the early
3275 stages of linking. Otherwise the linker might decide to pull in a
3276 definition from some other object, eg. a static library.
3277
3278 Update: As of August 2004, we support a new convention. Function
3279 calls may use the function descriptor symbol, ie. "bl foo". This
3280 behaves exactly as "bl .foo". */
3281
3282 /* The linker needs to keep track of the number of relocs that it
3283 decides to copy as dynamic relocs in check_relocs for each symbol.
3284 This is so that it can later discard them if they are found to be
3285 unnecessary. We store the information in a field extending the
3286 regular ELF linker hash table. */
3287
3288 struct ppc_dyn_relocs
3289 {
3290 struct ppc_dyn_relocs *next;
3291
3292 /* The input section of the reloc. */
3293 asection *sec;
3294
3295 /* Total number of relocs copied for the input section. */
3296 bfd_size_type count;
3297
3298 /* Number of pc-relative relocs copied for the input section. */
3299 bfd_size_type pc_count;
3300 };
3301
3302 /* Track GOT entries needed for a given symbol. We might need more
3303 than one got entry per symbol. */
3304 struct got_entry
3305 {
3306 struct got_entry *next;
3307
3308 /* The symbol addend that we'll be placing in the GOT. */
3309 bfd_vma addend;
3310
3311 /* Unlike other ELF targets, we use separate GOT entries for the same
3312 symbol referenced from different input files. This is to support
3313 automatic multiple TOC/GOT sections, where the TOC base can vary
3314 from one input file to another. FIXME: After group_sections we
3315 ought to merge entries within the group.
3316
3317 Point to the BFD owning this GOT entry. */
3318 bfd *owner;
3319
3320 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
3321 TLS_TPREL or TLS_DTPREL for tls entries. */
3322 char tls_type;
3323
3324 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
3325 union
3326 {
3327 bfd_signed_vma refcount;
3328 bfd_vma offset;
3329 } got;
3330 };
3331
3332 /* The same for PLT. */
3333 struct plt_entry
3334 {
3335 struct plt_entry *next;
3336
3337 bfd_vma addend;
3338
3339 union
3340 {
3341 bfd_signed_vma refcount;
3342 bfd_vma offset;
3343 } plt;
3344 };
3345
3346 /* Of those relocs that might be copied as dynamic relocs, this function
3347 selects those that must be copied when linking a shared library,
3348 even when the symbol is local. */
3349
3350 static int
3351 must_be_dyn_reloc (struct bfd_link_info *info,
3352 enum elf_ppc64_reloc_type r_type)
3353 {
3354 switch (r_type)
3355 {
3356 default:
3357 return 1;
3358
3359 case R_PPC64_REL32:
3360 case R_PPC64_REL64:
3361 case R_PPC64_REL30:
3362 return 0;
3363
3364 case R_PPC64_TPREL16:
3365 case R_PPC64_TPREL16_LO:
3366 case R_PPC64_TPREL16_HI:
3367 case R_PPC64_TPREL16_HA:
3368 case R_PPC64_TPREL16_DS:
3369 case R_PPC64_TPREL16_LO_DS:
3370 case R_PPC64_TPREL16_HIGHER:
3371 case R_PPC64_TPREL16_HIGHERA:
3372 case R_PPC64_TPREL16_HIGHEST:
3373 case R_PPC64_TPREL16_HIGHESTA:
3374 case R_PPC64_TPREL64:
3375 return !info->executable;
3376 }
3377 }
3378
3379 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3380 copying dynamic variables from a shared lib into an app's dynbss
3381 section, and instead use a dynamic relocation to point into the
3382 shared lib. With code that gcc generates, it's vital that this be
3383 enabled; In the PowerPC64 ABI, the address of a function is actually
3384 the address of a function descriptor, which resides in the .opd
3385 section. gcc uses the descriptor directly rather than going via the
3386 GOT as some other ABI's do, which means that initialized function
3387 pointers must reference the descriptor. Thus, a function pointer
3388 initialized to the address of a function in a shared library will
3389 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3390 redefines the function descriptor symbol to point to the copy. This
3391 presents a problem as a plt entry for that function is also
3392 initialized from the function descriptor symbol and the copy reloc
3393 may not be initialized first. */
3394 #define ELIMINATE_COPY_RELOCS 1
3395
3396 /* Section name for stubs is the associated section name plus this
3397 string. */
3398 #define STUB_SUFFIX ".stub"
3399
3400 /* Linker stubs.
3401 ppc_stub_long_branch:
3402 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3403 destination, but a 24 bit branch in a stub section will reach.
3404 . b dest
3405
3406 ppc_stub_plt_branch:
3407 Similar to the above, but a 24 bit branch in the stub section won't
3408 reach its destination.
3409 . addis %r12,%r2,xxx@toc@ha
3410 . ld %r11,xxx@toc@l(%r12)
3411 . mtctr %r11
3412 . bctr
3413
3414 ppc_stub_plt_call:
3415 Used to call a function in a shared library. If it so happens that
3416 the plt entry referenced crosses a 64k boundary, then an extra
3417 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3418 . addis %r12,%r2,xxx@toc@ha
3419 . std %r2,40(%r1)
3420 . ld %r11,xxx+0@toc@l(%r12)
3421 . mtctr %r11
3422 . ld %r2,xxx+8@toc@l(%r12)
3423 . ld %r11,xxx+16@toc@l(%r12)
3424 . bctr
3425
3426 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3427 code to adjust the value and save r2 to support multiple toc sections.
3428 A ppc_stub_long_branch with an r2 offset looks like:
3429 . std %r2,40(%r1)
3430 . addis %r2,%r2,off@ha
3431 . addi %r2,%r2,off@l
3432 . b dest
3433
3434 A ppc_stub_plt_branch with an r2 offset looks like:
3435 . std %r2,40(%r1)
3436 . addis %r12,%r2,xxx@toc@ha
3437 . ld %r11,xxx@toc@l(%r12)
3438 . addis %r2,%r2,off@ha
3439 . addi %r2,%r2,off@l
3440 . mtctr %r11
3441 . bctr
3442
3443 In cases where the "addis" instruction would add zero, the "addis" is
3444 omitted and following instructions modified slightly in some cases.
3445 */
3446
3447 enum ppc_stub_type {
3448 ppc_stub_none,
3449 ppc_stub_long_branch,
3450 ppc_stub_long_branch_r2off,
3451 ppc_stub_plt_branch,
3452 ppc_stub_plt_branch_r2off,
3453 ppc_stub_plt_call
3454 };
3455
3456 struct ppc_stub_hash_entry {
3457
3458 /* Base hash table entry structure. */
3459 struct bfd_hash_entry root;
3460
3461 enum ppc_stub_type stub_type;
3462
3463 /* The stub section. */
3464 asection *stub_sec;
3465
3466 /* Offset within stub_sec of the beginning of this stub. */
3467 bfd_vma stub_offset;
3468
3469 /* Given the symbol's value and its section we can determine its final
3470 value when building the stubs (so the stub knows where to jump. */
3471 bfd_vma target_value;
3472 asection *target_section;
3473
3474 /* The symbol table entry, if any, that this was derived from. */
3475 struct ppc_link_hash_entry *h;
3476
3477 /* And the reloc addend that this was derived from. */
3478 bfd_vma addend;
3479
3480 /* Where this stub is being called from, or, in the case of combined
3481 stub sections, the first input section in the group. */
3482 asection *id_sec;
3483 };
3484
3485 struct ppc_branch_hash_entry {
3486
3487 /* Base hash table entry structure. */
3488 struct bfd_hash_entry root;
3489
3490 /* Offset within branch lookup table. */
3491 unsigned int offset;
3492
3493 /* Generation marker. */
3494 unsigned int iter;
3495 };
3496
3497 struct ppc_link_hash_entry
3498 {
3499 struct elf_link_hash_entry elf;
3500
3501 union {
3502 /* A pointer to the most recently used stub hash entry against this
3503 symbol. */
3504 struct ppc_stub_hash_entry *stub_cache;
3505
3506 /* A pointer to the next symbol starting with a '.' */
3507 struct ppc_link_hash_entry *next_dot_sym;
3508 } u;
3509
3510 /* Track dynamic relocs copied for this symbol. */
3511 struct ppc_dyn_relocs *dyn_relocs;
3512
3513 /* Link between function code and descriptor symbols. */
3514 struct ppc_link_hash_entry *oh;
3515
3516 /* Flag function code and descriptor symbols. */
3517 unsigned int is_func:1;
3518 unsigned int is_func_descriptor:1;
3519 unsigned int fake:1;
3520
3521 /* Whether global opd/toc sym has been adjusted or not.
3522 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3523 should be set for all globals defined in any opd/toc section. */
3524 unsigned int adjust_done:1;
3525
3526 /* Set if we twiddled this symbol to weak at some stage. */
3527 unsigned int was_undefined:1;
3528
3529 /* Contexts in which symbol is used in the GOT (or TOC).
3530 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3531 corresponding relocs are encountered during check_relocs.
3532 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3533 indicate the corresponding GOT entry type is not needed.
3534 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3535 a TPREL one. We use a separate flag rather than setting TPREL
3536 just for convenience in distinguishing the two cases. */
3537 #define TLS_GD 1 /* GD reloc. */
3538 #define TLS_LD 2 /* LD reloc. */
3539 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3540 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3541 #define TLS_TLS 16 /* Any TLS reloc. */
3542 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3543 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3544 char tls_mask;
3545 };
3546
3547 /* ppc64 ELF linker hash table. */
3548
3549 struct ppc_link_hash_table
3550 {
3551 struct elf_link_hash_table elf;
3552
3553 /* The stub hash table. */
3554 struct bfd_hash_table stub_hash_table;
3555
3556 /* Another hash table for plt_branch stubs. */
3557 struct bfd_hash_table branch_hash_table;
3558
3559 /* Linker stub bfd. */
3560 bfd *stub_bfd;
3561
3562 /* Linker call-backs. */
3563 asection * (*add_stub_section) (const char *, asection *);
3564 void (*layout_sections_again) (void);
3565
3566 /* Array to keep track of which stub sections have been created, and
3567 information on stub grouping. */
3568 struct map_stub {
3569 /* This is the section to which stubs in the group will be attached. */
3570 asection *link_sec;
3571 /* The stub section. */
3572 asection *stub_sec;
3573 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3574 bfd_vma toc_off;
3575 } *stub_group;
3576
3577 /* Temp used when calculating TOC pointers. */
3578 bfd_vma toc_curr;
3579
3580 /* Highest input section id. */
3581 int top_id;
3582
3583 /* Highest output section index. */
3584 int top_index;
3585
3586 /* Used when adding symbols. */
3587 struct ppc_link_hash_entry *dot_syms;
3588
3589 /* List of input sections for each output section. */
3590 asection **input_list;
3591
3592 /* Short-cuts to get to dynamic linker sections. */
3593 asection *got;
3594 asection *plt;
3595 asection *relplt;
3596 asection *dynbss;
3597 asection *relbss;
3598 asection *glink;
3599 asection *sfpr;
3600 asection *brlt;
3601 asection *relbrlt;
3602
3603 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3604 struct ppc_link_hash_entry *tls_get_addr;
3605 struct ppc_link_hash_entry *tls_get_addr_fd;
3606
3607 /* Statistics. */
3608 unsigned long stub_count[ppc_stub_plt_call];
3609
3610 /* Number of stubs against global syms. */
3611 unsigned long stub_globals;
3612
3613 /* Set if we should emit symbols for stubs. */
3614 unsigned int emit_stub_syms:1;
3615
3616 /* Support for multiple toc sections. */
3617 unsigned int no_multi_toc:1;
3618 unsigned int multi_toc_needed:1;
3619
3620 /* Set on error. */
3621 unsigned int stub_error:1;
3622
3623 /* Temp used by ppc64_elf_check_directives. */
3624 unsigned int twiddled_syms:1;
3625
3626 /* Incremented every time we size stubs. */
3627 unsigned int stub_iteration;
3628
3629 /* Small local sym to section mapping cache. */
3630 struct sym_sec_cache sym_sec;
3631 };
3632
3633 /* Rename some of the generic section flags to better document how they
3634 are used here. */
3635 #define has_toc_reloc has_gp_reloc
3636 #define makes_toc_func_call need_finalize_relax
3637 #define call_check_in_progress reloc_done
3638
3639 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3640
3641 #define ppc_hash_table(p) \
3642 ((struct ppc_link_hash_table *) ((p)->hash))
3643
3644 #define ppc_stub_hash_lookup(table, string, create, copy) \
3645 ((struct ppc_stub_hash_entry *) \
3646 bfd_hash_lookup ((table), (string), (create), (copy)))
3647
3648 #define ppc_branch_hash_lookup(table, string, create, copy) \
3649 ((struct ppc_branch_hash_entry *) \
3650 bfd_hash_lookup ((table), (string), (create), (copy)))
3651
3652 /* Create an entry in the stub hash table. */
3653
3654 static struct bfd_hash_entry *
3655 stub_hash_newfunc (struct bfd_hash_entry *entry,
3656 struct bfd_hash_table *table,
3657 const char *string)
3658 {
3659 /* Allocate the structure if it has not already been allocated by a
3660 subclass. */
3661 if (entry == NULL)
3662 {
3663 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3664 if (entry == NULL)
3665 return entry;
3666 }
3667
3668 /* Call the allocation method of the superclass. */
3669 entry = bfd_hash_newfunc (entry, table, string);
3670 if (entry != NULL)
3671 {
3672 struct ppc_stub_hash_entry *eh;
3673
3674 /* Initialize the local fields. */
3675 eh = (struct ppc_stub_hash_entry *) entry;
3676 eh->stub_type = ppc_stub_none;
3677 eh->stub_sec = NULL;
3678 eh->stub_offset = 0;
3679 eh->target_value = 0;
3680 eh->target_section = NULL;
3681 eh->h = NULL;
3682 eh->id_sec = NULL;
3683 }
3684
3685 return entry;
3686 }
3687
3688 /* Create an entry in the branch hash table. */
3689
3690 static struct bfd_hash_entry *
3691 branch_hash_newfunc (struct bfd_hash_entry *entry,
3692 struct bfd_hash_table *table,
3693 const char *string)
3694 {
3695 /* Allocate the structure if it has not already been allocated by a
3696 subclass. */
3697 if (entry == NULL)
3698 {
3699 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3700 if (entry == NULL)
3701 return entry;
3702 }
3703
3704 /* Call the allocation method of the superclass. */
3705 entry = bfd_hash_newfunc (entry, table, string);
3706 if (entry != NULL)
3707 {
3708 struct ppc_branch_hash_entry *eh;
3709
3710 /* Initialize the local fields. */
3711 eh = (struct ppc_branch_hash_entry *) entry;
3712 eh->offset = 0;
3713 eh->iter = 0;
3714 }
3715
3716 return entry;
3717 }
3718
3719 /* Create an entry in a ppc64 ELF linker hash table. */
3720
3721 static struct bfd_hash_entry *
3722 link_hash_newfunc (struct bfd_hash_entry *entry,
3723 struct bfd_hash_table *table,
3724 const char *string)
3725 {
3726 /* Allocate the structure if it has not already been allocated by a
3727 subclass. */
3728 if (entry == NULL)
3729 {
3730 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3731 if (entry == NULL)
3732 return entry;
3733 }
3734
3735 /* Call the allocation method of the superclass. */
3736 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3737 if (entry != NULL)
3738 {
3739 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3740
3741 memset (&eh->u.stub_cache, 0,
3742 (sizeof (struct ppc_link_hash_entry)
3743 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3744
3745 /* When making function calls, old ABI code references function entry
3746 points (dot symbols), while new ABI code references the function
3747 descriptor symbol. We need to make any combination of reference and
3748 definition work together, without breaking archive linking.
3749
3750 For a defined function "foo" and an undefined call to "bar":
3751 An old object defines "foo" and ".foo", references ".bar" (possibly
3752 "bar" too).
3753 A new object defines "foo" and references "bar".
3754
3755 A new object thus has no problem with its undefined symbols being
3756 satisfied by definitions in an old object. On the other hand, the
3757 old object won't have ".bar" satisfied by a new object.
3758
3759 Keep a list of newly added dot-symbols. */
3760
3761 if (string[0] == '.')
3762 {
3763 struct ppc_link_hash_table *htab;
3764
3765 htab = (struct ppc_link_hash_table *) table;
3766 eh->u.next_dot_sym = htab->dot_syms;
3767 htab->dot_syms = eh;
3768 }
3769 }
3770
3771 return entry;
3772 }
3773
3774 /* Create a ppc64 ELF linker hash table. */
3775
3776 static struct bfd_link_hash_table *
3777 ppc64_elf_link_hash_table_create (bfd *abfd)
3778 {
3779 struct ppc_link_hash_table *htab;
3780 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3781
3782 htab = bfd_zmalloc (amt);
3783 if (htab == NULL)
3784 return NULL;
3785
3786 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3787 sizeof (struct ppc_link_hash_entry)))
3788 {
3789 free (htab);
3790 return NULL;
3791 }
3792
3793 /* Init the stub hash table too. */
3794 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3795 sizeof (struct ppc_stub_hash_entry)))
3796 return NULL;
3797
3798 /* And the branch hash table. */
3799 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3800 sizeof (struct ppc_branch_hash_entry)))
3801 return NULL;
3802
3803 /* Initializing two fields of the union is just cosmetic. We really
3804 only care about glist, but when compiled on a 32-bit host the
3805 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3806 debugger inspection of these fields look nicer. */
3807 htab->elf.init_got_refcount.refcount = 0;
3808 htab->elf.init_got_refcount.glist = NULL;
3809 htab->elf.init_plt_refcount.refcount = 0;
3810 htab->elf.init_plt_refcount.glist = NULL;
3811 htab->elf.init_got_offset.offset = 0;
3812 htab->elf.init_got_offset.glist = NULL;
3813 htab->elf.init_plt_offset.offset = 0;
3814 htab->elf.init_plt_offset.glist = NULL;
3815
3816 return &htab->elf.root;
3817 }
3818
3819 /* Free the derived linker hash table. */
3820
3821 static void
3822 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3823 {
3824 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3825
3826 bfd_hash_table_free (&ret->stub_hash_table);
3827 bfd_hash_table_free (&ret->branch_hash_table);
3828 _bfd_generic_link_hash_table_free (hash);
3829 }
3830
3831 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3832
3833 void
3834 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3835 {
3836 struct ppc_link_hash_table *htab;
3837
3838 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3839
3840 /* Always hook our dynamic sections into the first bfd, which is the
3841 linker created stub bfd. This ensures that the GOT header is at
3842 the start of the output TOC section. */
3843 htab = ppc_hash_table (info);
3844 htab->stub_bfd = abfd;
3845 htab->elf.dynobj = abfd;
3846 }
3847
3848 /* Build a name for an entry in the stub hash table. */
3849
3850 static char *
3851 ppc_stub_name (const asection *input_section,
3852 const asection *sym_sec,
3853 const struct ppc_link_hash_entry *h,
3854 const Elf_Internal_Rela *rel)
3855 {
3856 char *stub_name;
3857 bfd_size_type len;
3858
3859 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
3860 offsets from a sym as a branch target? In fact, we could
3861 probably assume the addend is always zero. */
3862 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
3863
3864 if (h)
3865 {
3866 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
3867 stub_name = bfd_malloc (len);
3868 if (stub_name == NULL)
3869 return stub_name;
3870
3871 sprintf (stub_name, "%08x.%s+%x",
3872 input_section->id & 0xffffffff,
3873 h->elf.root.root.string,
3874 (int) rel->r_addend & 0xffffffff);
3875 }
3876 else
3877 {
3878 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
3879 stub_name = bfd_malloc (len);
3880 if (stub_name == NULL)
3881 return stub_name;
3882
3883 sprintf (stub_name, "%08x.%x:%x+%x",
3884 input_section->id & 0xffffffff,
3885 sym_sec->id & 0xffffffff,
3886 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
3887 (int) rel->r_addend & 0xffffffff);
3888 }
3889 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
3890 stub_name[len - 2] = 0;
3891 return stub_name;
3892 }
3893
3894 /* Look up an entry in the stub hash. Stub entries are cached because
3895 creating the stub name takes a bit of time. */
3896
3897 static struct ppc_stub_hash_entry *
3898 ppc_get_stub_entry (const asection *input_section,
3899 const asection *sym_sec,
3900 struct ppc_link_hash_entry *h,
3901 const Elf_Internal_Rela *rel,
3902 struct ppc_link_hash_table *htab)
3903 {
3904 struct ppc_stub_hash_entry *stub_entry;
3905 const asection *id_sec;
3906
3907 /* If this input section is part of a group of sections sharing one
3908 stub section, then use the id of the first section in the group.
3909 Stub names need to include a section id, as there may well be
3910 more than one stub used to reach say, printf, and we need to
3911 distinguish between them. */
3912 id_sec = htab->stub_group[input_section->id].link_sec;
3913
3914 if (h != NULL && h->u.stub_cache != NULL
3915 && h->u.stub_cache->h == h
3916 && h->u.stub_cache->id_sec == id_sec)
3917 {
3918 stub_entry = h->u.stub_cache;
3919 }
3920 else
3921 {
3922 char *stub_name;
3923
3924 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
3925 if (stub_name == NULL)
3926 return NULL;
3927
3928 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
3929 stub_name, FALSE, FALSE);
3930 if (h != NULL)
3931 h->u.stub_cache = stub_entry;
3932
3933 free (stub_name);
3934 }
3935
3936 return stub_entry;
3937 }
3938
3939 /* Add a new stub entry to the stub hash. Not all fields of the new
3940 stub entry are initialised. */
3941
3942 static struct ppc_stub_hash_entry *
3943 ppc_add_stub (const char *stub_name,
3944 asection *section,
3945 struct ppc_link_hash_table *htab)
3946 {
3947 asection *link_sec;
3948 asection *stub_sec;
3949 struct ppc_stub_hash_entry *stub_entry;
3950
3951 link_sec = htab->stub_group[section->id].link_sec;
3952 stub_sec = htab->stub_group[section->id].stub_sec;
3953 if (stub_sec == NULL)
3954 {
3955 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3956 if (stub_sec == NULL)
3957 {
3958 size_t namelen;
3959 bfd_size_type len;
3960 char *s_name;
3961
3962 namelen = strlen (link_sec->name);
3963 len = namelen + sizeof (STUB_SUFFIX);
3964 s_name = bfd_alloc (htab->stub_bfd, len);
3965 if (s_name == NULL)
3966 return NULL;
3967
3968 memcpy (s_name, link_sec->name, namelen);
3969 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3970 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3971 if (stub_sec == NULL)
3972 return NULL;
3973 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3974 }
3975 htab->stub_group[section->id].stub_sec = stub_sec;
3976 }
3977
3978 /* Enter this entry into the linker stub hash table. */
3979 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3980 TRUE, FALSE);
3981 if (stub_entry == NULL)
3982 {
3983 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
3984 section->owner, stub_name);
3985 return NULL;
3986 }
3987
3988 stub_entry->stub_sec = stub_sec;
3989 stub_entry->stub_offset = 0;
3990 stub_entry->id_sec = link_sec;
3991 return stub_entry;
3992 }
3993
3994 /* Create sections for linker generated code. */
3995
3996 static bfd_boolean
3997 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
3998 {
3999 struct ppc_link_hash_table *htab;
4000 flagword flags;
4001
4002 htab = ppc_hash_table (info);
4003
4004 /* Create .sfpr for code to save and restore fp regs. */
4005 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4006 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4007 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4008 flags);
4009 if (htab->sfpr == NULL
4010 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4011 return FALSE;
4012
4013 /* Create .glink for lazy dynamic linking support. */
4014 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4015 flags);
4016 if (htab->glink == NULL
4017 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4018 return FALSE;
4019
4020 /* Create branch lookup table for plt_branch stubs. */
4021 flags = (SEC_ALLOC | SEC_LOAD
4022 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4023 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4024 flags);
4025 if (htab->brlt == NULL
4026 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4027 return FALSE;
4028
4029 if (!info->shared)
4030 return TRUE;
4031
4032 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4033 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4034 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4035 ".rela.branch_lt",
4036 flags);
4037 if (!htab->relbrlt
4038 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4039 return FALSE;
4040
4041 return TRUE;
4042 }
4043
4044 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4045 not already done. */
4046
4047 static bfd_boolean
4048 create_got_section (bfd *abfd, struct bfd_link_info *info)
4049 {
4050 asection *got, *relgot;
4051 flagword flags;
4052 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4053
4054 if (!is_ppc64_elf (abfd))
4055 return FALSE;
4056
4057 if (!htab->got)
4058 {
4059 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4060 return FALSE;
4061
4062 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4063 if (!htab->got)
4064 abort ();
4065 }
4066
4067 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4068 | SEC_LINKER_CREATED);
4069
4070 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4071 if (!got
4072 || !bfd_set_section_alignment (abfd, got, 3))
4073 return FALSE;
4074
4075 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4076 flags | SEC_READONLY);
4077 if (!relgot
4078 || ! bfd_set_section_alignment (abfd, relgot, 3))
4079 return FALSE;
4080
4081 ppc64_elf_tdata (abfd)->got = got;
4082 ppc64_elf_tdata (abfd)->relgot = relgot;
4083 return TRUE;
4084 }
4085
4086 /* Create the dynamic sections, and set up shortcuts. */
4087
4088 static bfd_boolean
4089 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4090 {
4091 struct ppc_link_hash_table *htab;
4092
4093 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4094 return FALSE;
4095
4096 htab = ppc_hash_table (info);
4097 if (!htab->got)
4098 htab->got = bfd_get_section_by_name (dynobj, ".got");
4099 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4100 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4101 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4102 if (!info->shared)
4103 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4104
4105 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4106 || (!info->shared && !htab->relbss))
4107 abort ();
4108
4109 return TRUE;
4110 }
4111
4112 /* Merge PLT info on FROM with that on TO. */
4113
4114 static void
4115 move_plt_plist (struct ppc_link_hash_entry *from,
4116 struct ppc_link_hash_entry *to)
4117 {
4118 if (from->elf.plt.plist != NULL)
4119 {
4120 if (to->elf.plt.plist != NULL)
4121 {
4122 struct plt_entry **entp;
4123 struct plt_entry *ent;
4124
4125 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4126 {
4127 struct plt_entry *dent;
4128
4129 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4130 if (dent->addend == ent->addend)
4131 {
4132 dent->plt.refcount += ent->plt.refcount;
4133 *entp = ent->next;
4134 break;
4135 }
4136 if (dent == NULL)
4137 entp = &ent->next;
4138 }
4139 *entp = to->elf.plt.plist;
4140 }
4141
4142 to->elf.plt.plist = from->elf.plt.plist;
4143 from->elf.plt.plist = NULL;
4144 }
4145 }
4146
4147 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4148
4149 static void
4150 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4151 struct elf_link_hash_entry *dir,
4152 struct elf_link_hash_entry *ind)
4153 {
4154 struct ppc_link_hash_entry *edir, *eind;
4155
4156 edir = (struct ppc_link_hash_entry *) dir;
4157 eind = (struct ppc_link_hash_entry *) ind;
4158
4159 /* Copy over any dynamic relocs we may have on the indirect sym. */
4160 if (eind->dyn_relocs != NULL)
4161 {
4162 if (edir->dyn_relocs != NULL)
4163 {
4164 struct ppc_dyn_relocs **pp;
4165 struct ppc_dyn_relocs *p;
4166
4167 /* Add reloc counts against the indirect sym to the direct sym
4168 list. Merge any entries against the same section. */
4169 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4170 {
4171 struct ppc_dyn_relocs *q;
4172
4173 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4174 if (q->sec == p->sec)
4175 {
4176 q->pc_count += p->pc_count;
4177 q->count += p->count;
4178 *pp = p->next;
4179 break;
4180 }
4181 if (q == NULL)
4182 pp = &p->next;
4183 }
4184 *pp = edir->dyn_relocs;
4185 }
4186
4187 edir->dyn_relocs = eind->dyn_relocs;
4188 eind->dyn_relocs = NULL;
4189 }
4190
4191 edir->is_func |= eind->is_func;
4192 edir->is_func_descriptor |= eind->is_func_descriptor;
4193 edir->tls_mask |= eind->tls_mask;
4194
4195 /* If called to transfer flags for a weakdef during processing
4196 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4197 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4198 if (!(ELIMINATE_COPY_RELOCS
4199 && eind->elf.root.type != bfd_link_hash_indirect
4200 && edir->elf.dynamic_adjusted))
4201 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4202
4203 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4204 edir->elf.ref_regular |= eind->elf.ref_regular;
4205 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4206 edir->elf.needs_plt |= eind->elf.needs_plt;
4207
4208 /* If we were called to copy over info for a weak sym, that's all. */
4209 if (eind->elf.root.type != bfd_link_hash_indirect)
4210 return;
4211
4212 /* Copy over got entries that we may have already seen to the
4213 symbol which just became indirect. */
4214 if (eind->elf.got.glist != NULL)
4215 {
4216 if (edir->elf.got.glist != NULL)
4217 {
4218 struct got_entry **entp;
4219 struct got_entry *ent;
4220
4221 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4222 {
4223 struct got_entry *dent;
4224
4225 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4226 if (dent->addend == ent->addend
4227 && dent->owner == ent->owner
4228 && dent->tls_type == ent->tls_type)
4229 {
4230 dent->got.refcount += ent->got.refcount;
4231 *entp = ent->next;
4232 break;
4233 }
4234 if (dent == NULL)
4235 entp = &ent->next;
4236 }
4237 *entp = edir->elf.got.glist;
4238 }
4239
4240 edir->elf.got.glist = eind->elf.got.glist;
4241 eind->elf.got.glist = NULL;
4242 }
4243
4244 /* And plt entries. */
4245 move_plt_plist (eind, edir);
4246
4247 if (eind->elf.dynindx != -1)
4248 {
4249 if (edir->elf.dynindx != -1)
4250 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4251 edir->elf.dynstr_index);
4252 edir->elf.dynindx = eind->elf.dynindx;
4253 edir->elf.dynstr_index = eind->elf.dynstr_index;
4254 eind->elf.dynindx = -1;
4255 eind->elf.dynstr_index = 0;
4256 }
4257 }
4258
4259 /* Find the function descriptor hash entry from the given function code
4260 hash entry FH. Link the entries via their OH fields. */
4261
4262 static struct ppc_link_hash_entry *
4263 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4264 {
4265 struct ppc_link_hash_entry *fdh = fh->oh;
4266
4267 if (fdh == NULL)
4268 {
4269 const char *fd_name = fh->elf.root.root.string + 1;
4270
4271 fdh = (struct ppc_link_hash_entry *)
4272 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4273 if (fdh != NULL)
4274 {
4275 fdh->is_func_descriptor = 1;
4276 fdh->oh = fh;
4277 fh->is_func = 1;
4278 fh->oh = fdh;
4279 }
4280 }
4281
4282 return fdh;
4283 }
4284
4285 /* Make a fake function descriptor sym for the code sym FH. */
4286
4287 static struct ppc_link_hash_entry *
4288 make_fdh (struct bfd_link_info *info,
4289 struct ppc_link_hash_entry *fh)
4290 {
4291 bfd *abfd;
4292 asymbol *newsym;
4293 struct bfd_link_hash_entry *bh;
4294 struct ppc_link_hash_entry *fdh;
4295
4296 abfd = fh->elf.root.u.undef.abfd;
4297 newsym = bfd_make_empty_symbol (abfd);
4298 newsym->name = fh->elf.root.root.string + 1;
4299 newsym->section = bfd_und_section_ptr;
4300 newsym->value = 0;
4301 newsym->flags = BSF_WEAK;
4302
4303 bh = NULL;
4304 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4305 newsym->flags, newsym->section,
4306 newsym->value, NULL, FALSE, FALSE,
4307 &bh))
4308 return NULL;
4309
4310 fdh = (struct ppc_link_hash_entry *) bh;
4311 fdh->elf.non_elf = 0;
4312 fdh->fake = 1;
4313 fdh->is_func_descriptor = 1;
4314 fdh->oh = fh;
4315 fh->is_func = 1;
4316 fh->oh = fdh;
4317 return fdh;
4318 }
4319
4320 /* Fix function descriptor symbols defined in .opd sections to be
4321 function type. */
4322
4323 static bfd_boolean
4324 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED,
4325 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4326 Elf_Internal_Sym *isym,
4327 const char **name ATTRIBUTE_UNUSED,
4328 flagword *flags ATTRIBUTE_UNUSED,
4329 asection **sec,
4330 bfd_vma *value ATTRIBUTE_UNUSED)
4331 {
4332 if (*sec != NULL
4333 && strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0)
4334 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4335
4336 return TRUE;
4337 }
4338
4339 /* This function makes an old ABI object reference to ".bar" cause the
4340 inclusion of a new ABI object archive that defines "bar".
4341 NAME is a symbol defined in an archive. Return a symbol in the hash
4342 table that might be satisfied by the archive symbols. */
4343
4344 static struct elf_link_hash_entry *
4345 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4346 struct bfd_link_info *info,
4347 const char *name)
4348 {
4349 struct elf_link_hash_entry *h;
4350 char *dot_name;
4351 size_t len;
4352
4353 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4354 if (h != NULL
4355 /* Don't return this sym if it is a fake function descriptor
4356 created by add_symbol_adjust. */
4357 && !(h->root.type == bfd_link_hash_undefweak
4358 && ((struct ppc_link_hash_entry *) h)->fake))
4359 return h;
4360
4361 if (name[0] == '.')
4362 return h;
4363
4364 len = strlen (name);
4365 dot_name = bfd_alloc (abfd, len + 2);
4366 if (dot_name == NULL)
4367 return (struct elf_link_hash_entry *) 0 - 1;
4368 dot_name[0] = '.';
4369 memcpy (dot_name + 1, name, len + 1);
4370 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4371 bfd_release (abfd, dot_name);
4372 return h;
4373 }
4374
4375 /* This function satisfies all old ABI object references to ".bar" if a
4376 new ABI object defines "bar". Well, at least, undefined dot symbols
4377 are made weak. This stops later archive searches from including an
4378 object if we already have a function descriptor definition. It also
4379 prevents the linker complaining about undefined symbols.
4380 We also check and correct mismatched symbol visibility here. The
4381 most restrictive visibility of the function descriptor and the
4382 function entry symbol is used. */
4383
4384 static bfd_boolean
4385 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4386 {
4387 struct ppc_link_hash_table *htab;
4388 struct ppc_link_hash_entry *fdh;
4389
4390 if (eh->elf.root.type == bfd_link_hash_indirect)
4391 return TRUE;
4392
4393 if (eh->elf.root.type == bfd_link_hash_warning)
4394 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4395
4396 if (eh->elf.root.root.string[0] != '.')
4397 abort ();
4398
4399 htab = ppc_hash_table (info);
4400 fdh = get_fdh (eh, htab);
4401 if (fdh == NULL
4402 && !info->relocatable
4403 && (eh->elf.root.type == bfd_link_hash_undefined
4404 || eh->elf.root.type == bfd_link_hash_undefweak)
4405 && eh->elf.ref_regular)
4406 {
4407 /* Make an undefweak function descriptor sym, which is enough to
4408 pull in an --as-needed shared lib, but won't cause link
4409 errors. Archives are handled elsewhere. */
4410 fdh = make_fdh (info, eh);
4411 if (fdh == NULL)
4412 return FALSE;
4413 else
4414 fdh->elf.ref_regular = 1;
4415 }
4416 else if (fdh != NULL)
4417 {
4418 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4419 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4420 if (entry_vis < descr_vis)
4421 fdh->elf.other += entry_vis - descr_vis;
4422 else if (entry_vis > descr_vis)
4423 eh->elf.other += descr_vis - entry_vis;
4424
4425 if ((fdh->elf.root.type == bfd_link_hash_defined
4426 || fdh->elf.root.type == bfd_link_hash_defweak)
4427 && eh->elf.root.type == bfd_link_hash_undefined)
4428 {
4429 eh->elf.root.type = bfd_link_hash_undefweak;
4430 eh->was_undefined = 1;
4431 htab->twiddled_syms = 1;
4432 }
4433 }
4434
4435 return TRUE;
4436 }
4437
4438 /* Process list of dot-symbols we made in link_hash_newfunc. */
4439
4440 static bfd_boolean
4441 ppc64_elf_check_directives (bfd *ibfd, struct bfd_link_info *info)
4442 {
4443 struct ppc_link_hash_table *htab;
4444 struct ppc_link_hash_entry **p, *eh;
4445
4446 htab = ppc_hash_table (info);
4447 if (!is_ppc64_elf (info->output_bfd))
4448 return TRUE;
4449
4450 if (is_ppc64_elf (ibfd))
4451 {
4452 p = &htab->dot_syms;
4453 while ((eh = *p) != NULL)
4454 {
4455 *p = NULL;
4456 if (!add_symbol_adjust (eh, info))
4457 return FALSE;
4458 p = &eh->u.next_dot_sym;
4459 }
4460 }
4461
4462 /* Clear the list for non-ppc64 input files. */
4463 p = &htab->dot_syms;
4464 while ((eh = *p) != NULL)
4465 {
4466 *p = NULL;
4467 p = &eh->u.next_dot_sym;
4468 }
4469
4470 /* We need to fix the undefs list for any syms we have twiddled to
4471 undef_weak. */
4472 if (htab->twiddled_syms)
4473 {
4474 bfd_link_repair_undef_list (&htab->elf.root);
4475 htab->twiddled_syms = 0;
4476 }
4477 return TRUE;
4478 }
4479
4480 /* Undo hash table changes when an --as-needed input file is determined
4481 not to be needed. */
4482
4483 static bfd_boolean
4484 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4485 struct bfd_link_info *info)
4486 {
4487 ppc_hash_table (info)->dot_syms = NULL;
4488 return TRUE;
4489 }
4490
4491 static bfd_boolean
4492 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4493 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4494 {
4495 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4496 char *local_got_tls_masks;
4497
4498 if (local_got_ents == NULL)
4499 {
4500 bfd_size_type size = symtab_hdr->sh_info;
4501
4502 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks);
4503 local_got_ents = bfd_zalloc (abfd, size);
4504 if (local_got_ents == NULL)
4505 return FALSE;
4506 elf_local_got_ents (abfd) = local_got_ents;
4507 }
4508
4509 if ((tls_type & TLS_EXPLICIT) == 0)
4510 {
4511 struct got_entry *ent;
4512
4513 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4514 if (ent->addend == r_addend
4515 && ent->owner == abfd
4516 && ent->tls_type == tls_type)
4517 break;
4518 if (ent == NULL)
4519 {
4520 bfd_size_type amt = sizeof (*ent);
4521 ent = bfd_alloc (abfd, amt);
4522 if (ent == NULL)
4523 return FALSE;
4524 ent->next = local_got_ents[r_symndx];
4525 ent->addend = r_addend;
4526 ent->owner = abfd;
4527 ent->tls_type = tls_type;
4528 ent->got.refcount = 0;
4529 local_got_ents[r_symndx] = ent;
4530 }
4531 ent->got.refcount += 1;
4532 }
4533
4534 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
4535 local_got_tls_masks[r_symndx] |= tls_type;
4536 return TRUE;
4537 }
4538
4539 static bfd_boolean
4540 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend)
4541 {
4542 struct plt_entry *ent;
4543
4544 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next)
4545 if (ent->addend == addend)
4546 break;
4547 if (ent == NULL)
4548 {
4549 bfd_size_type amt = sizeof (*ent);
4550 ent = bfd_alloc (abfd, amt);
4551 if (ent == NULL)
4552 return FALSE;
4553 ent->next = eh->elf.plt.plist;
4554 ent->addend = addend;
4555 ent->plt.refcount = 0;
4556 eh->elf.plt.plist = ent;
4557 }
4558 ent->plt.refcount += 1;
4559 eh->elf.needs_plt = 1;
4560 if (eh->elf.root.root.string[0] == '.'
4561 && eh->elf.root.root.string[1] != '\0')
4562 eh->is_func = 1;
4563 return TRUE;
4564 }
4565
4566 /* Look through the relocs for a section during the first phase, and
4567 calculate needed space in the global offset table, procedure
4568 linkage table, and dynamic reloc sections. */
4569
4570 static bfd_boolean
4571 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4572 asection *sec, const Elf_Internal_Rela *relocs)
4573 {
4574 struct ppc_link_hash_table *htab;
4575 Elf_Internal_Shdr *symtab_hdr;
4576 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4577 const Elf_Internal_Rela *rel;
4578 const Elf_Internal_Rela *rel_end;
4579 asection *sreloc;
4580 asection **opd_sym_map;
4581
4582 if (info->relocatable)
4583 return TRUE;
4584
4585 /* Don't do anything special with non-loaded, non-alloced sections.
4586 In particular, any relocs in such sections should not affect GOT
4587 and PLT reference counting (ie. we don't allow them to create GOT
4588 or PLT entries), there's no possibility or desire to optimize TLS
4589 relocs, and there's not much point in propagating relocs to shared
4590 libs that the dynamic linker won't relocate. */
4591 if ((sec->flags & SEC_ALLOC) == 0)
4592 return TRUE;
4593
4594 BFD_ASSERT (is_ppc64_elf (abfd));
4595
4596 htab = ppc_hash_table (info);
4597 symtab_hdr = &elf_symtab_hdr (abfd);
4598
4599 sym_hashes = elf_sym_hashes (abfd);
4600 sym_hashes_end = (sym_hashes
4601 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
4602 - symtab_hdr->sh_info);
4603
4604 sreloc = NULL;
4605 opd_sym_map = NULL;
4606 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
4607 {
4608 /* Garbage collection needs some extra help with .opd sections.
4609 We don't want to necessarily keep everything referenced by
4610 relocs in .opd, as that would keep all functions. Instead,
4611 if we reference an .opd symbol (a function descriptor), we
4612 want to keep the function code symbol's section. This is
4613 easy for global symbols, but for local syms we need to keep
4614 information about the associated function section. */
4615 bfd_size_type amt;
4616
4617 amt = sec->size * sizeof (*opd_sym_map) / 8;
4618 opd_sym_map = bfd_zalloc (abfd, amt);
4619 if (opd_sym_map == NULL)
4620 return FALSE;
4621 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4622 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4623 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4624 }
4625
4626 if (htab->sfpr == NULL
4627 && !create_linkage_sections (htab->elf.dynobj, info))
4628 return FALSE;
4629
4630 rel_end = relocs + sec->reloc_count;
4631 for (rel = relocs; rel < rel_end; rel++)
4632 {
4633 unsigned long r_symndx;
4634 struct elf_link_hash_entry *h;
4635 enum elf_ppc64_reloc_type r_type;
4636 int tls_type = 0;
4637 struct _ppc64_elf_section_data *ppc64_sec;
4638
4639 r_symndx = ELF64_R_SYM (rel->r_info);
4640 if (r_symndx < symtab_hdr->sh_info)
4641 h = NULL;
4642 else
4643 {
4644 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4645 while (h->root.type == bfd_link_hash_indirect
4646 || h->root.type == bfd_link_hash_warning)
4647 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4648 }
4649
4650 r_type = ELF64_R_TYPE (rel->r_info);
4651 switch (r_type)
4652 {
4653 case R_PPC64_GOT_TLSLD16:
4654 case R_PPC64_GOT_TLSLD16_LO:
4655 case R_PPC64_GOT_TLSLD16_HI:
4656 case R_PPC64_GOT_TLSLD16_HA:
4657 tls_type = TLS_TLS | TLS_LD;
4658 goto dogottls;
4659
4660 case R_PPC64_GOT_TLSGD16:
4661 case R_PPC64_GOT_TLSGD16_LO:
4662 case R_PPC64_GOT_TLSGD16_HI:
4663 case R_PPC64_GOT_TLSGD16_HA:
4664 tls_type = TLS_TLS | TLS_GD;
4665 goto dogottls;
4666
4667 case R_PPC64_GOT_TPREL16_DS:
4668 case R_PPC64_GOT_TPREL16_LO_DS:
4669 case R_PPC64_GOT_TPREL16_HI:
4670 case R_PPC64_GOT_TPREL16_HA:
4671 if (!info->executable)
4672 info->flags |= DF_STATIC_TLS;
4673 tls_type = TLS_TLS | TLS_TPREL;
4674 goto dogottls;
4675
4676 case R_PPC64_GOT_DTPREL16_DS:
4677 case R_PPC64_GOT_DTPREL16_LO_DS:
4678 case R_PPC64_GOT_DTPREL16_HI:
4679 case R_PPC64_GOT_DTPREL16_HA:
4680 tls_type = TLS_TLS | TLS_DTPREL;
4681 dogottls:
4682 sec->has_tls_reloc = 1;
4683 /* Fall thru */
4684
4685 case R_PPC64_GOT16:
4686 case R_PPC64_GOT16_DS:
4687 case R_PPC64_GOT16_HA:
4688 case R_PPC64_GOT16_HI:
4689 case R_PPC64_GOT16_LO:
4690 case R_PPC64_GOT16_LO_DS:
4691 /* This symbol requires a global offset table entry. */
4692 sec->has_toc_reloc = 1;
4693 if (ppc64_elf_tdata (abfd)->got == NULL
4694 && !create_got_section (abfd, info))
4695 return FALSE;
4696
4697 if (h != NULL)
4698 {
4699 struct ppc_link_hash_entry *eh;
4700 struct got_entry *ent;
4701
4702 eh = (struct ppc_link_hash_entry *) h;
4703 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
4704 if (ent->addend == rel->r_addend
4705 && ent->owner == abfd
4706 && ent->tls_type == tls_type)
4707 break;
4708 if (ent == NULL)
4709 {
4710 bfd_size_type amt = sizeof (*ent);
4711 ent = bfd_alloc (abfd, amt);
4712 if (ent == NULL)
4713 return FALSE;
4714 ent->next = eh->elf.got.glist;
4715 ent->addend = rel->r_addend;
4716 ent->owner = abfd;
4717 ent->tls_type = tls_type;
4718 ent->got.refcount = 0;
4719 eh->elf.got.glist = ent;
4720 }
4721 ent->got.refcount += 1;
4722 eh->tls_mask |= tls_type;
4723 }
4724 else
4725 /* This is a global offset table entry for a local symbol. */
4726 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4727 rel->r_addend, tls_type))
4728 return FALSE;
4729 break;
4730
4731 case R_PPC64_PLT16_HA:
4732 case R_PPC64_PLT16_HI:
4733 case R_PPC64_PLT16_LO:
4734 case R_PPC64_PLT32:
4735 case R_PPC64_PLT64:
4736 /* This symbol requires a procedure linkage table entry. We
4737 actually build the entry in adjust_dynamic_symbol,
4738 because this might be a case of linking PIC code without
4739 linking in any dynamic objects, in which case we don't
4740 need to generate a procedure linkage table after all. */
4741 if (h == NULL)
4742 {
4743 /* It does not make sense to have a procedure linkage
4744 table entry for a local symbol. */
4745 bfd_set_error (bfd_error_bad_value);
4746 return FALSE;
4747 }
4748 else
4749 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4750 rel->r_addend))
4751 return FALSE;
4752 break;
4753
4754 /* The following relocations don't need to propagate the
4755 relocation if linking a shared object since they are
4756 section relative. */
4757 case R_PPC64_SECTOFF:
4758 case R_PPC64_SECTOFF_LO:
4759 case R_PPC64_SECTOFF_HI:
4760 case R_PPC64_SECTOFF_HA:
4761 case R_PPC64_SECTOFF_DS:
4762 case R_PPC64_SECTOFF_LO_DS:
4763 case R_PPC64_DTPREL16:
4764 case R_PPC64_DTPREL16_LO:
4765 case R_PPC64_DTPREL16_HI:
4766 case R_PPC64_DTPREL16_HA:
4767 case R_PPC64_DTPREL16_DS:
4768 case R_PPC64_DTPREL16_LO_DS:
4769 case R_PPC64_DTPREL16_HIGHER:
4770 case R_PPC64_DTPREL16_HIGHERA:
4771 case R_PPC64_DTPREL16_HIGHEST:
4772 case R_PPC64_DTPREL16_HIGHESTA:
4773 break;
4774
4775 /* Nor do these. */
4776 case R_PPC64_TOC16:
4777 case R_PPC64_TOC16_LO:
4778 case R_PPC64_TOC16_HI:
4779 case R_PPC64_TOC16_HA:
4780 case R_PPC64_TOC16_DS:
4781 case R_PPC64_TOC16_LO_DS:
4782 sec->has_toc_reloc = 1;
4783 break;
4784
4785 /* This relocation describes the C++ object vtable hierarchy.
4786 Reconstruct it for later use during GC. */
4787 case R_PPC64_GNU_VTINHERIT:
4788 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4789 return FALSE;
4790 break;
4791
4792 /* This relocation describes which C++ vtable entries are actually
4793 used. Record for later use during GC. */
4794 case R_PPC64_GNU_VTENTRY:
4795 BFD_ASSERT (h != NULL);
4796 if (h != NULL
4797 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4798 return FALSE;
4799 break;
4800
4801 case R_PPC64_REL14:
4802 case R_PPC64_REL14_BRTAKEN:
4803 case R_PPC64_REL14_BRNTAKEN:
4804 {
4805 asection *dest = NULL;
4806
4807 /* Heuristic: If jumping outside our section, chances are
4808 we are going to need a stub. */
4809 if (h != NULL)
4810 {
4811 /* If the sym is weak it may be overridden later, so
4812 don't assume we know where a weak sym lives. */
4813 if (h->root.type == bfd_link_hash_defined)
4814 dest = h->root.u.def.section;
4815 }
4816 else
4817 dest = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
4818 sec, r_symndx);
4819 if (dest != sec)
4820 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
4821 }
4822 /* Fall through. */
4823
4824 case R_PPC64_REL24:
4825 if (h != NULL)
4826 {
4827 /* We may need a .plt entry if the function this reloc
4828 refers to is in a shared lib. */
4829 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h,
4830 rel->r_addend))
4831 return FALSE;
4832 if (h == &htab->tls_get_addr->elf
4833 || h == &htab->tls_get_addr_fd->elf)
4834 sec->has_tls_reloc = 1;
4835 else if (htab->tls_get_addr == NULL
4836 && CONST_STRNEQ (h->root.root.string, ".__tls_get_addr")
4837 && (h->root.root.string[15] == 0
4838 || h->root.root.string[15] == '@'))
4839 {
4840 htab->tls_get_addr = (struct ppc_link_hash_entry *) h;
4841 sec->has_tls_reloc = 1;
4842 }
4843 else if (htab->tls_get_addr_fd == NULL
4844 && CONST_STRNEQ (h->root.root.string, "__tls_get_addr")
4845 && (h->root.root.string[14] == 0
4846 || h->root.root.string[14] == '@'))
4847 {
4848 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) h;
4849 sec->has_tls_reloc = 1;
4850 }
4851 }
4852 break;
4853
4854 case R_PPC64_TPREL64:
4855 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
4856 if (!info->executable)
4857 info->flags |= DF_STATIC_TLS;
4858 goto dotlstoc;
4859
4860 case R_PPC64_DTPMOD64:
4861 if (rel + 1 < rel_end
4862 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
4863 && rel[1].r_offset == rel->r_offset + 8)
4864 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
4865 else
4866 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
4867 goto dotlstoc;
4868
4869 case R_PPC64_DTPREL64:
4870 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
4871 if (rel != relocs
4872 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
4873 && rel[-1].r_offset == rel->r_offset - 8)
4874 /* This is the second reloc of a dtpmod, dtprel pair.
4875 Don't mark with TLS_DTPREL. */
4876 goto dodyn;
4877
4878 dotlstoc:
4879 sec->has_tls_reloc = 1;
4880 if (h != NULL)
4881 {
4882 struct ppc_link_hash_entry *eh;
4883 eh = (struct ppc_link_hash_entry *) h;
4884 eh->tls_mask |= tls_type;
4885 }
4886 else
4887 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4888 rel->r_addend, tls_type))
4889 return FALSE;
4890
4891 ppc64_sec = ppc64_elf_section_data (sec);
4892 if (ppc64_sec->sec_type != sec_toc)
4893 {
4894 /* One extra to simplify get_tls_mask. */
4895 bfd_size_type amt = sec->size * sizeof (unsigned) / 8 + 1;
4896 ppc64_sec->u.t_symndx = bfd_zalloc (abfd, amt);
4897 if (ppc64_sec->u.t_symndx == NULL)
4898 return FALSE;
4899 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
4900 ppc64_sec->sec_type = sec_toc;
4901 }
4902 BFD_ASSERT (rel->r_offset % 8 == 0);
4903 ppc64_sec->u.t_symndx[rel->r_offset / 8] = r_symndx;
4904
4905 /* Mark the second slot of a GD or LD entry.
4906 -1 to indicate GD and -2 to indicate LD. */
4907 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
4908 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -1;
4909 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
4910 ppc64_sec->u.t_symndx[rel->r_offset / 8 + 1] = -2;
4911 goto dodyn;
4912
4913 case R_PPC64_TPREL16:
4914 case R_PPC64_TPREL16_LO:
4915 case R_PPC64_TPREL16_HI:
4916 case R_PPC64_TPREL16_HA:
4917 case R_PPC64_TPREL16_DS:
4918 case R_PPC64_TPREL16_LO_DS:
4919 case R_PPC64_TPREL16_HIGHER:
4920 case R_PPC64_TPREL16_HIGHERA:
4921 case R_PPC64_TPREL16_HIGHEST:
4922 case R_PPC64_TPREL16_HIGHESTA:
4923 if (info->shared)
4924 {
4925 if (!info->executable)
4926 info->flags |= DF_STATIC_TLS;
4927 goto dodyn;
4928 }
4929 break;
4930
4931 case R_PPC64_ADDR64:
4932 if (opd_sym_map != NULL
4933 && rel + 1 < rel_end
4934 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
4935 {
4936 if (h != NULL)
4937 {
4938 if (h->root.root.string[0] == '.'
4939 && h->root.root.string[1] != 0
4940 && get_fdh ((struct ppc_link_hash_entry *) h, htab))
4941 ;
4942 else
4943 ((struct ppc_link_hash_entry *) h)->is_func = 1;
4944 }
4945 else
4946 {
4947 asection *s;
4948
4949 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
4950 r_symndx);
4951 if (s == NULL)
4952 return FALSE;
4953 else if (s != sec)
4954 opd_sym_map[rel->r_offset / 8] = s;
4955 }
4956 }
4957 /* Fall through. */
4958
4959 case R_PPC64_REL30:
4960 case R_PPC64_REL32:
4961 case R_PPC64_REL64:
4962 case R_PPC64_ADDR14:
4963 case R_PPC64_ADDR14_BRNTAKEN:
4964 case R_PPC64_ADDR14_BRTAKEN:
4965 case R_PPC64_ADDR16:
4966 case R_PPC64_ADDR16_DS:
4967 case R_PPC64_ADDR16_HA:
4968 case R_PPC64_ADDR16_HI:
4969 case R_PPC64_ADDR16_HIGHER:
4970 case R_PPC64_ADDR16_HIGHERA:
4971 case R_PPC64_ADDR16_HIGHEST:
4972 case R_PPC64_ADDR16_HIGHESTA:
4973 case R_PPC64_ADDR16_LO:
4974 case R_PPC64_ADDR16_LO_DS:
4975 case R_PPC64_ADDR24:
4976 case R_PPC64_ADDR32:
4977 case R_PPC64_UADDR16:
4978 case R_PPC64_UADDR32:
4979 case R_PPC64_UADDR64:
4980 case R_PPC64_TOC:
4981 if (h != NULL && !info->shared)
4982 /* We may need a copy reloc. */
4983 h->non_got_ref = 1;
4984
4985 /* Don't propagate .opd relocs. */
4986 if (NO_OPD_RELOCS && opd_sym_map != NULL)
4987 break;
4988
4989 /* If we are creating a shared library, and this is a reloc
4990 against a global symbol, or a non PC relative reloc
4991 against a local symbol, then we need to copy the reloc
4992 into the shared library. However, if we are linking with
4993 -Bsymbolic, we do not need to copy a reloc against a
4994 global symbol which is defined in an object we are
4995 including in the link (i.e., DEF_REGULAR is set). At
4996 this point we have not seen all the input files, so it is
4997 possible that DEF_REGULAR is not set now but will be set
4998 later (it is never cleared). In case of a weak definition,
4999 DEF_REGULAR may be cleared later by a strong definition in
5000 a shared library. We account for that possibility below by
5001 storing information in the dyn_relocs field of the hash
5002 table entry. A similar situation occurs when creating
5003 shared libraries and symbol visibility changes render the
5004 symbol local.
5005
5006 If on the other hand, we are creating an executable, we
5007 may need to keep relocations for symbols satisfied by a
5008 dynamic library if we manage to avoid copy relocs for the
5009 symbol. */
5010 dodyn:
5011 if ((info->shared
5012 && (must_be_dyn_reloc (info, r_type)
5013 || (h != NULL
5014 && (! info->symbolic
5015 || h->root.type == bfd_link_hash_defweak
5016 || !h->def_regular))))
5017 || (ELIMINATE_COPY_RELOCS
5018 && !info->shared
5019 && h != NULL
5020 && (h->root.type == bfd_link_hash_defweak
5021 || !h->def_regular)))
5022 {
5023 struct ppc_dyn_relocs *p;
5024 struct ppc_dyn_relocs **head;
5025
5026 /* We must copy these reloc types into the output file.
5027 Create a reloc section in dynobj and make room for
5028 this reloc. */
5029 if (sreloc == NULL)
5030 {
5031 const char *name;
5032 bfd *dynobj;
5033
5034 name = (bfd_elf_string_from_elf_section
5035 (abfd,
5036 elf_elfheader (abfd)->e_shstrndx,
5037 elf_section_data (sec)->rel_hdr.sh_name));
5038 if (name == NULL)
5039 return FALSE;
5040
5041 if (! CONST_STRNEQ (name, ".rela")
5042 || strcmp (bfd_get_section_name (abfd, sec),
5043 name + 5) != 0)
5044 {
5045 (*_bfd_error_handler)
5046 (_("%B: bad relocation section name `%s\'"),
5047 abfd, name);
5048 bfd_set_error (bfd_error_bad_value);
5049 }
5050
5051 dynobj = htab->elf.dynobj;
5052 sreloc = bfd_get_section_by_name (dynobj, name);
5053 if (sreloc == NULL)
5054 {
5055 flagword flags;
5056
5057 flags = (SEC_HAS_CONTENTS | SEC_READONLY
5058 | SEC_IN_MEMORY | SEC_LINKER_CREATED
5059 | SEC_ALLOC | SEC_LOAD);
5060 sreloc = bfd_make_section_with_flags (dynobj,
5061 name,
5062 flags);
5063 if (sreloc == NULL
5064 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
5065 return FALSE;
5066 }
5067 elf_section_data (sec)->sreloc = sreloc;
5068 }
5069
5070 /* If this is a global symbol, we count the number of
5071 relocations we need for this symbol. */
5072 if (h != NULL)
5073 {
5074 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5075 }
5076 else
5077 {
5078 /* Track dynamic relocs needed for local syms too.
5079 We really need local syms available to do this
5080 easily. Oh well. */
5081
5082 asection *s;
5083 void *vpp;
5084
5085 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
5086 sec, r_symndx);
5087 if (s == NULL)
5088 return FALSE;
5089
5090 vpp = &elf_section_data (s)->local_dynrel;
5091 head = (struct ppc_dyn_relocs **) vpp;
5092 }
5093
5094 p = *head;
5095 if (p == NULL || p->sec != sec)
5096 {
5097 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5098 if (p == NULL)
5099 return FALSE;
5100 p->next = *head;
5101 *head = p;
5102 p->sec = sec;
5103 p->count = 0;
5104 p->pc_count = 0;
5105 }
5106
5107 p->count += 1;
5108 if (!must_be_dyn_reloc (info, r_type))
5109 p->pc_count += 1;
5110 }
5111 break;
5112
5113 default:
5114 break;
5115 }
5116 }
5117
5118 return TRUE;
5119 }
5120
5121 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5122 of the code entry point, and its section. */
5123
5124 static bfd_vma
5125 opd_entry_value (asection *opd_sec,
5126 bfd_vma offset,
5127 asection **code_sec,
5128 bfd_vma *code_off)
5129 {
5130 bfd *opd_bfd = opd_sec->owner;
5131 Elf_Internal_Rela *relocs;
5132 Elf_Internal_Rela *lo, *hi, *look;
5133 bfd_vma val;
5134
5135 /* No relocs implies we are linking a --just-symbols object. */
5136 if (opd_sec->reloc_count == 0)
5137 {
5138 bfd_vma val;
5139
5140 if (!bfd_get_section_contents (opd_bfd, opd_sec, &val, offset, 8))
5141 return (bfd_vma) -1;
5142
5143 if (code_sec != NULL)
5144 {
5145 asection *sec, *likely = NULL;
5146 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5147 if (sec->vma <= val
5148 && (sec->flags & SEC_LOAD) != 0
5149 && (sec->flags & SEC_ALLOC) != 0)
5150 likely = sec;
5151 if (likely != NULL)
5152 {
5153 *code_sec = likely;
5154 if (code_off != NULL)
5155 *code_off = val - likely->vma;
5156 }
5157 }
5158 return val;
5159 }
5160
5161 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5162
5163 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5164 if (relocs == NULL)
5165 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5166
5167 /* Go find the opd reloc at the sym address. */
5168 lo = relocs;
5169 BFD_ASSERT (lo != NULL);
5170 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5171 val = (bfd_vma) -1;
5172 while (lo < hi)
5173 {
5174 look = lo + (hi - lo) / 2;
5175 if (look->r_offset < offset)
5176 lo = look + 1;
5177 else if (look->r_offset > offset)
5178 hi = look;
5179 else
5180 {
5181 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5182
5183 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5184 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5185 {
5186 unsigned long symndx = ELF64_R_SYM (look->r_info);
5187 asection *sec;
5188
5189 if (symndx < symtab_hdr->sh_info)
5190 {
5191 Elf_Internal_Sym *sym;
5192
5193 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5194 if (sym == NULL)
5195 {
5196 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5197 symtab_hdr->sh_info,
5198 0, NULL, NULL, NULL);
5199 if (sym == NULL)
5200 break;
5201 symtab_hdr->contents = (bfd_byte *) sym;
5202 }
5203
5204 sym += symndx;
5205 val = sym->st_value;
5206 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5207 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5208 }
5209 else
5210 {
5211 struct elf_link_hash_entry **sym_hashes;
5212 struct elf_link_hash_entry *rh;
5213
5214 sym_hashes = elf_sym_hashes (opd_bfd);
5215 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5216 while (rh->root.type == bfd_link_hash_indirect
5217 || rh->root.type == bfd_link_hash_warning)
5218 rh = ((struct elf_link_hash_entry *) rh->root.u.i.link);
5219 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5220 || rh->root.type == bfd_link_hash_defweak);
5221 val = rh->root.u.def.value;
5222 sec = rh->root.u.def.section;
5223 }
5224 val += look->r_addend;
5225 if (code_off != NULL)
5226 *code_off = val;
5227 if (code_sec != NULL)
5228 *code_sec = sec;
5229 if (sec != NULL && sec->output_section != NULL)
5230 val += sec->output_section->vma + sec->output_offset;
5231 }
5232 break;
5233 }
5234 }
5235
5236 return val;
5237 }
5238
5239 /* Mark all our entry sym sections, both opd and code section. */
5240
5241 static void
5242 ppc64_elf_gc_keep (struct bfd_link_info *info)
5243 {
5244 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5245 struct bfd_sym_chain *sym;
5246
5247 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5248 {
5249 struct ppc_link_hash_entry *eh;
5250 asection *sec;
5251
5252 eh = (struct ppc_link_hash_entry *)
5253 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE);
5254 if (eh == NULL)
5255 continue;
5256 if (eh->elf.root.type != bfd_link_hash_defined
5257 && eh->elf.root.type != bfd_link_hash_defweak)
5258 continue;
5259
5260 if (eh->is_func_descriptor
5261 && (eh->oh->elf.root.type == bfd_link_hash_defined
5262 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5263 {
5264 sec = eh->oh->elf.root.u.def.section;
5265 sec->flags |= SEC_KEEP;
5266 }
5267 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5268 && opd_entry_value (eh->elf.root.u.def.section,
5269 eh->elf.root.u.def.value,
5270 &sec, NULL) != (bfd_vma) -1)
5271 sec->flags |= SEC_KEEP;
5272
5273 sec = eh->elf.root.u.def.section;
5274 sec->flags |= SEC_KEEP;
5275 }
5276 }
5277
5278 /* Mark sections containing dynamically referenced symbols. When
5279 building shared libraries, we must assume that any visible symbol is
5280 referenced. */
5281
5282 static bfd_boolean
5283 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5284 {
5285 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5286 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5287
5288 if (eh->elf.root.type == bfd_link_hash_warning)
5289 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
5290
5291 /* Dynamic linking info is on the func descriptor sym. */
5292 if (eh->oh != NULL
5293 && eh->oh->is_func_descriptor
5294 && (eh->oh->elf.root.type == bfd_link_hash_defined
5295 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5296 eh = eh->oh;
5297
5298 if ((eh->elf.root.type == bfd_link_hash_defined
5299 || eh->elf.root.type == bfd_link_hash_defweak)
5300 && (eh->elf.ref_dynamic
5301 || (!info->executable
5302 && eh->elf.def_regular
5303 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5304 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5305 {
5306 asection *code_sec;
5307
5308 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5309
5310 /* Function descriptor syms cause the associated
5311 function code sym section to be marked. */
5312 if (eh->is_func_descriptor
5313 && (eh->oh->elf.root.type == bfd_link_hash_defined
5314 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5315 eh->oh->elf.root.u.def.section->flags |= SEC_KEEP;
5316 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5317 && opd_entry_value (eh->elf.root.u.def.section,
5318 eh->elf.root.u.def.value,
5319 &code_sec, NULL) != (bfd_vma) -1)
5320 code_sec->flags |= SEC_KEEP;
5321 }
5322
5323 return TRUE;
5324 }
5325
5326 /* Return the section that should be marked against GC for a given
5327 relocation. */
5328
5329 static asection *
5330 ppc64_elf_gc_mark_hook (asection *sec,
5331 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5332 Elf_Internal_Rela *rel,
5333 struct elf_link_hash_entry *h,
5334 Elf_Internal_Sym *sym)
5335 {
5336 asection *rsec;
5337
5338 /* Syms return NULL if we're marking .opd, so we avoid marking all
5339 function sections, as all functions are referenced in .opd. */
5340 rsec = NULL;
5341 if (get_opd_info (sec) != NULL)
5342 return rsec;
5343
5344 if (h != NULL)
5345 {
5346 enum elf_ppc64_reloc_type r_type;
5347 struct ppc_link_hash_entry *eh;
5348
5349 r_type = ELF64_R_TYPE (rel->r_info);
5350 switch (r_type)
5351 {
5352 case R_PPC64_GNU_VTINHERIT:
5353 case R_PPC64_GNU_VTENTRY:
5354 break;
5355
5356 default:
5357 switch (h->root.type)
5358 {
5359 case bfd_link_hash_defined:
5360 case bfd_link_hash_defweak:
5361 eh = (struct ppc_link_hash_entry *) h;
5362 if (eh->oh != NULL
5363 && eh->oh->is_func_descriptor
5364 && (eh->oh->elf.root.type == bfd_link_hash_defined
5365 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5366 eh = eh->oh;
5367
5368 /* Function descriptor syms cause the associated
5369 function code sym section to be marked. */
5370 if (eh->is_func_descriptor
5371 && (eh->oh->elf.root.type == bfd_link_hash_defined
5372 || eh->oh->elf.root.type == bfd_link_hash_defweak))
5373 {
5374 /* They also mark their opd section. */
5375 eh->elf.root.u.def.section->gc_mark = 1;
5376
5377 rsec = eh->oh->elf.root.u.def.section;
5378 }
5379 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5380 && opd_entry_value (eh->elf.root.u.def.section,
5381 eh->elf.root.u.def.value,
5382 &rsec, NULL) != (bfd_vma) -1)
5383 eh->elf.root.u.def.section->gc_mark = 1;
5384 else
5385 rsec = h->root.u.def.section;
5386 break;
5387
5388 case bfd_link_hash_common:
5389 rsec = h->root.u.c.p->section;
5390 break;
5391
5392 default:
5393 break;
5394 }
5395 }
5396 }
5397 else
5398 {
5399 struct _opd_sec_data *opd;
5400
5401 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5402 opd = get_opd_info (rsec);
5403 if (opd != NULL && opd->func_sec != NULL)
5404 {
5405 rsec->gc_mark = 1;
5406
5407 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5408 }
5409 }
5410
5411 return rsec;
5412 }
5413
5414 /* Update the .got, .plt. and dynamic reloc reference counts for the
5415 section being removed. */
5416
5417 static bfd_boolean
5418 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5419 asection *sec, const Elf_Internal_Rela *relocs)
5420 {
5421 struct ppc_link_hash_table *htab;
5422 Elf_Internal_Shdr *symtab_hdr;
5423 struct elf_link_hash_entry **sym_hashes;
5424 struct got_entry **local_got_ents;
5425 const Elf_Internal_Rela *rel, *relend;
5426
5427 if (info->relocatable)
5428 return TRUE;
5429
5430 if ((sec->flags & SEC_ALLOC) == 0)
5431 return TRUE;
5432
5433 elf_section_data (sec)->local_dynrel = NULL;
5434
5435 htab = ppc_hash_table (info);
5436 symtab_hdr = &elf_symtab_hdr (abfd);
5437 sym_hashes = elf_sym_hashes (abfd);
5438 local_got_ents = elf_local_got_ents (abfd);
5439
5440 relend = relocs + sec->reloc_count;
5441 for (rel = relocs; rel < relend; rel++)
5442 {
5443 unsigned long r_symndx;
5444 enum elf_ppc64_reloc_type r_type;
5445 struct elf_link_hash_entry *h = NULL;
5446 char tls_type = 0;
5447
5448 r_symndx = ELF64_R_SYM (rel->r_info);
5449 r_type = ELF64_R_TYPE (rel->r_info);
5450 if (r_symndx >= symtab_hdr->sh_info)
5451 {
5452 struct ppc_link_hash_entry *eh;
5453 struct ppc_dyn_relocs **pp;
5454 struct ppc_dyn_relocs *p;
5455
5456 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5457 while (h->root.type == bfd_link_hash_indirect
5458 || h->root.type == bfd_link_hash_warning)
5459 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5460 eh = (struct ppc_link_hash_entry *) h;
5461
5462 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5463 if (p->sec == sec)
5464 {
5465 /* Everything must go for SEC. */
5466 *pp = p->next;
5467 break;
5468 }
5469 }
5470
5471 switch (r_type)
5472 {
5473 case R_PPC64_GOT_TLSLD16:
5474 case R_PPC64_GOT_TLSLD16_LO:
5475 case R_PPC64_GOT_TLSLD16_HI:
5476 case R_PPC64_GOT_TLSLD16_HA:
5477 tls_type = TLS_TLS | TLS_LD;
5478 goto dogot;
5479
5480 case R_PPC64_GOT_TLSGD16:
5481 case R_PPC64_GOT_TLSGD16_LO:
5482 case R_PPC64_GOT_TLSGD16_HI:
5483 case R_PPC64_GOT_TLSGD16_HA:
5484 tls_type = TLS_TLS | TLS_GD;
5485 goto dogot;
5486
5487 case R_PPC64_GOT_TPREL16_DS:
5488 case R_PPC64_GOT_TPREL16_LO_DS:
5489 case R_PPC64_GOT_TPREL16_HI:
5490 case R_PPC64_GOT_TPREL16_HA:
5491 tls_type = TLS_TLS | TLS_TPREL;
5492 goto dogot;
5493
5494 case R_PPC64_GOT_DTPREL16_DS:
5495 case R_PPC64_GOT_DTPREL16_LO_DS:
5496 case R_PPC64_GOT_DTPREL16_HI:
5497 case R_PPC64_GOT_DTPREL16_HA:
5498 tls_type = TLS_TLS | TLS_DTPREL;
5499 goto dogot;
5500
5501 case R_PPC64_GOT16:
5502 case R_PPC64_GOT16_DS:
5503 case R_PPC64_GOT16_HA:
5504 case R_PPC64_GOT16_HI:
5505 case R_PPC64_GOT16_LO:
5506 case R_PPC64_GOT16_LO_DS:
5507 dogot:
5508 {
5509 struct got_entry *ent;
5510
5511 if (h != NULL)
5512 ent = h->got.glist;
5513 else
5514 ent = local_got_ents[r_symndx];
5515
5516 for (; ent != NULL; ent = ent->next)
5517 if (ent->addend == rel->r_addend
5518 && ent->owner == abfd
5519 && ent->tls_type == tls_type)
5520 break;
5521 if (ent == NULL)
5522 abort ();
5523 if (ent->got.refcount > 0)
5524 ent->got.refcount -= 1;
5525 }
5526 break;
5527
5528 case R_PPC64_PLT16_HA:
5529 case R_PPC64_PLT16_HI:
5530 case R_PPC64_PLT16_LO:
5531 case R_PPC64_PLT32:
5532 case R_PPC64_PLT64:
5533 case R_PPC64_REL14:
5534 case R_PPC64_REL14_BRNTAKEN:
5535 case R_PPC64_REL14_BRTAKEN:
5536 case R_PPC64_REL24:
5537 if (h != NULL)
5538 {
5539 struct plt_entry *ent;
5540
5541 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5542 if (ent->addend == rel->r_addend)
5543 break;
5544 if (ent == NULL)
5545 abort ();
5546 if (ent->plt.refcount > 0)
5547 ent->plt.refcount -= 1;
5548 }
5549 break;
5550
5551 default:
5552 break;
5553 }
5554 }
5555 return TRUE;
5556 }
5557
5558 /* The maximum size of .sfpr. */
5559 #define SFPR_MAX (218*4)
5560
5561 struct sfpr_def_parms
5562 {
5563 const char name[12];
5564 unsigned char lo, hi;
5565 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5566 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5567 };
5568
5569 /* Auto-generate _save*, _rest* functions in .sfpr. */
5570
5571 static unsigned int
5572 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5573 {
5574 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5575 unsigned int i;
5576 size_t len = strlen (parm->name);
5577 bfd_boolean writing = FALSE;
5578 char sym[16];
5579
5580 memcpy (sym, parm->name, len);
5581 sym[len + 2] = 0;
5582
5583 for (i = parm->lo; i <= parm->hi; i++)
5584 {
5585 struct elf_link_hash_entry *h;
5586
5587 sym[len + 0] = i / 10 + '0';
5588 sym[len + 1] = i % 10 + '0';
5589 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5590 if (h != NULL
5591 && !h->def_regular)
5592 {
5593 h->root.type = bfd_link_hash_defined;
5594 h->root.u.def.section = htab->sfpr;
5595 h->root.u.def.value = htab->sfpr->size;
5596 h->type = STT_FUNC;
5597 h->def_regular = 1;
5598 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
5599 writing = TRUE;
5600 if (htab->sfpr->contents == NULL)
5601 {
5602 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
5603 if (htab->sfpr->contents == NULL)
5604 return FALSE;
5605 }
5606 }
5607 if (writing)
5608 {
5609 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
5610 if (i != parm->hi)
5611 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
5612 else
5613 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
5614 htab->sfpr->size = p - htab->sfpr->contents;
5615 }
5616 }
5617
5618 return TRUE;
5619 }
5620
5621 static bfd_byte *
5622 savegpr0 (bfd *abfd, bfd_byte *p, int r)
5623 {
5624 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5625 return p + 4;
5626 }
5627
5628 static bfd_byte *
5629 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
5630 {
5631 p = savegpr0 (abfd, p, r);
5632 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5633 p = p + 4;
5634 bfd_put_32 (abfd, BLR, p);
5635 return p + 4;
5636 }
5637
5638 static bfd_byte *
5639 restgpr0 (bfd *abfd, bfd_byte *p, int r)
5640 {
5641 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5642 return p + 4;
5643 }
5644
5645 static bfd_byte *
5646 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
5647 {
5648 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5649 p = p + 4;
5650 p = restgpr0 (abfd, p, r);
5651 bfd_put_32 (abfd, MTLR_R0, p);
5652 p = p + 4;
5653 if (r == 29)
5654 {
5655 p = restgpr0 (abfd, p, 30);
5656 p = restgpr0 (abfd, p, 31);
5657 }
5658 bfd_put_32 (abfd, BLR, p);
5659 return p + 4;
5660 }
5661
5662 static bfd_byte *
5663 savegpr1 (bfd *abfd, bfd_byte *p, int r)
5664 {
5665 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5666 return p + 4;
5667 }
5668
5669 static bfd_byte *
5670 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
5671 {
5672 p = savegpr1 (abfd, p, r);
5673 bfd_put_32 (abfd, BLR, p);
5674 return p + 4;
5675 }
5676
5677 static bfd_byte *
5678 restgpr1 (bfd *abfd, bfd_byte *p, int r)
5679 {
5680 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5681 return p + 4;
5682 }
5683
5684 static bfd_byte *
5685 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
5686 {
5687 p = restgpr1 (abfd, p, r);
5688 bfd_put_32 (abfd, BLR, p);
5689 return p + 4;
5690 }
5691
5692 static bfd_byte *
5693 savefpr (bfd *abfd, bfd_byte *p, int r)
5694 {
5695 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5696 return p + 4;
5697 }
5698
5699 static bfd_byte *
5700 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
5701 {
5702 p = savefpr (abfd, p, r);
5703 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
5704 p = p + 4;
5705 bfd_put_32 (abfd, BLR, p);
5706 return p + 4;
5707 }
5708
5709 static bfd_byte *
5710 restfpr (bfd *abfd, bfd_byte *p, int r)
5711 {
5712 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
5713 return p + 4;
5714 }
5715
5716 static bfd_byte *
5717 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
5718 {
5719 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
5720 p = p + 4;
5721 p = restfpr (abfd, p, r);
5722 bfd_put_32 (abfd, MTLR_R0, p);
5723 p = p + 4;
5724 if (r == 29)
5725 {
5726 p = restfpr (abfd, p, 30);
5727 p = restfpr (abfd, p, 31);
5728 }
5729 bfd_put_32 (abfd, BLR, p);
5730 return p + 4;
5731 }
5732
5733 static bfd_byte *
5734 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
5735 {
5736 p = savefpr (abfd, p, r);
5737 bfd_put_32 (abfd, BLR, p);
5738 return p + 4;
5739 }
5740
5741 static bfd_byte *
5742 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
5743 {
5744 p = restfpr (abfd, p, r);
5745 bfd_put_32 (abfd, BLR, p);
5746 return p + 4;
5747 }
5748
5749 static bfd_byte *
5750 savevr (bfd *abfd, bfd_byte *p, int r)
5751 {
5752 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5753 p = p + 4;
5754 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
5755 return p + 4;
5756 }
5757
5758 static bfd_byte *
5759 savevr_tail (bfd *abfd, bfd_byte *p, int r)
5760 {
5761 p = savevr (abfd, p, r);
5762 bfd_put_32 (abfd, BLR, p);
5763 return p + 4;
5764 }
5765
5766 static bfd_byte *
5767 restvr (bfd *abfd, bfd_byte *p, int r)
5768 {
5769 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
5770 p = p + 4;
5771 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
5772 return p + 4;
5773 }
5774
5775 static bfd_byte *
5776 restvr_tail (bfd *abfd, bfd_byte *p, int r)
5777 {
5778 p = restvr (abfd, p, r);
5779 bfd_put_32 (abfd, BLR, p);
5780 return p + 4;
5781 }
5782
5783 /* Called via elf_link_hash_traverse to transfer dynamic linking
5784 information on function code symbol entries to their corresponding
5785 function descriptor symbol entries. */
5786
5787 static bfd_boolean
5788 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
5789 {
5790 struct bfd_link_info *info;
5791 struct ppc_link_hash_table *htab;
5792 struct plt_entry *ent;
5793 struct ppc_link_hash_entry *fh;
5794 struct ppc_link_hash_entry *fdh;
5795 bfd_boolean force_local;
5796
5797 fh = (struct ppc_link_hash_entry *) h;
5798 if (fh->elf.root.type == bfd_link_hash_indirect)
5799 return TRUE;
5800
5801 if (fh->elf.root.type == bfd_link_hash_warning)
5802 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link;
5803
5804 info = inf;
5805 htab = ppc_hash_table (info);
5806
5807 /* Resolve undefined references to dot-symbols as the value
5808 in the function descriptor, if we have one in a regular object.
5809 This is to satisfy cases like ".quad .foo". Calls to functions
5810 in dynamic objects are handled elsewhere. */
5811 if (fh->elf.root.type == bfd_link_hash_undefweak
5812 && fh->was_undefined
5813 && (fh->oh->elf.root.type == bfd_link_hash_defined
5814 || fh->oh->elf.root.type == bfd_link_hash_defweak)
5815 && get_opd_info (fh->oh->elf.root.u.def.section) != NULL
5816 && opd_entry_value (fh->oh->elf.root.u.def.section,
5817 fh->oh->elf.root.u.def.value,
5818 &fh->elf.root.u.def.section,
5819 &fh->elf.root.u.def.value) != (bfd_vma) -1)
5820 {
5821 fh->elf.root.type = fh->oh->elf.root.type;
5822 fh->elf.forced_local = 1;
5823 fh->elf.def_regular = fh->oh->elf.def_regular;
5824 fh->elf.def_dynamic = fh->oh->elf.def_dynamic;
5825 }
5826
5827 /* If this is a function code symbol, transfer dynamic linking
5828 information to the function descriptor symbol. */
5829 if (!fh->is_func)
5830 return TRUE;
5831
5832 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
5833 if (ent->plt.refcount > 0)
5834 break;
5835 if (ent == NULL
5836 || fh->elf.root.root.string[0] != '.'
5837 || fh->elf.root.root.string[1] == '\0')
5838 return TRUE;
5839
5840 /* Find the corresponding function descriptor symbol. Create it
5841 as undefined if necessary. */
5842
5843 fdh = get_fdh (fh, htab);
5844 if (fdh != NULL)
5845 while (fdh->elf.root.type == bfd_link_hash_indirect
5846 || fdh->elf.root.type == bfd_link_hash_warning)
5847 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link;
5848
5849 if (fdh == NULL
5850 && info->shared
5851 && (fh->elf.root.type == bfd_link_hash_undefined
5852 || fh->elf.root.type == bfd_link_hash_undefweak))
5853 {
5854 fdh = make_fdh (info, fh);
5855 if (fdh == NULL)
5856 return FALSE;
5857 }
5858
5859 /* Fake function descriptors are made undefweak. If the function
5860 code symbol is strong undefined, make the fake sym the same.
5861 If the function code symbol is defined, then force the fake
5862 descriptor local; We can't support overriding of symbols in a
5863 shared library on a fake descriptor. */
5864
5865 if (fdh != NULL
5866 && fdh->fake
5867 && fdh->elf.root.type == bfd_link_hash_undefweak)
5868 {
5869 if (fh->elf.root.type == bfd_link_hash_undefined)
5870 {
5871 fdh->elf.root.type = bfd_link_hash_undefined;
5872 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
5873 }
5874 else if (fh->elf.root.type == bfd_link_hash_defined
5875 || fh->elf.root.type == bfd_link_hash_defweak)
5876 {
5877 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
5878 }
5879 }
5880
5881 if (fdh != NULL
5882 && !fdh->elf.forced_local
5883 && (info->shared
5884 || fdh->elf.def_dynamic
5885 || fdh->elf.ref_dynamic
5886 || (fdh->elf.root.type == bfd_link_hash_undefweak
5887 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
5888 {
5889 if (fdh->elf.dynindx == -1)
5890 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
5891 return FALSE;
5892 fdh->elf.ref_regular |= fh->elf.ref_regular;
5893 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
5894 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
5895 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
5896 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
5897 {
5898 move_plt_plist (fh, fdh);
5899 fdh->elf.needs_plt = 1;
5900 }
5901 fdh->is_func_descriptor = 1;
5902 fdh->oh = fh;
5903 fh->oh = fdh;
5904 }
5905
5906 /* Now that the info is on the function descriptor, clear the
5907 function code sym info. Any function code syms for which we
5908 don't have a definition in a regular file, we force local.
5909 This prevents a shared library from exporting syms that have
5910 been imported from another library. Function code syms that
5911 are really in the library we must leave global to prevent the
5912 linker dragging in a definition from a static library. */
5913 force_local = (!fh->elf.def_regular
5914 || fdh == NULL
5915 || !fdh->elf.def_regular
5916 || fdh->elf.forced_local);
5917 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
5918
5919 return TRUE;
5920 }
5921
5922 /* Called near the start of bfd_elf_size_dynamic_sections. We use
5923 this hook to a) provide some gcc support functions, and b) transfer
5924 dynamic linking information gathered so far on function code symbol
5925 entries, to their corresponding function descriptor symbol entries. */
5926
5927 static bfd_boolean
5928 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
5929 struct bfd_link_info *info)
5930 {
5931 struct ppc_link_hash_table *htab;
5932 unsigned int i;
5933 const struct sfpr_def_parms funcs[] =
5934 {
5935 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
5936 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
5937 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
5938 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
5939 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
5940 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
5941 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
5942 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
5943 { "._savef", 14, 31, savefpr, savefpr1_tail },
5944 { "._restf", 14, 31, restfpr, restfpr1_tail },
5945 { "_savevr_", 20, 31, savevr, savevr_tail },
5946 { "_restvr_", 20, 31, restvr, restvr_tail }
5947 };
5948
5949 htab = ppc_hash_table (info);
5950 if (htab->sfpr == NULL)
5951 /* We don't have any relocs. */
5952 return TRUE;
5953
5954 /* Provide any missing _save* and _rest* functions. */
5955 htab->sfpr->size = 0;
5956 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
5957 if (!sfpr_define (info, &funcs[i]))
5958 return FALSE;
5959
5960 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
5961
5962 if (htab->sfpr->size == 0)
5963 htab->sfpr->flags |= SEC_EXCLUDE;
5964
5965 return TRUE;
5966 }
5967
5968 /* Adjust a symbol defined by a dynamic object and referenced by a
5969 regular object. The current definition is in some section of the
5970 dynamic object, but we're not including those sections. We have to
5971 change the definition to something the rest of the link can
5972 understand. */
5973
5974 static bfd_boolean
5975 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5976 struct elf_link_hash_entry *h)
5977 {
5978 struct ppc_link_hash_table *htab;
5979 asection *s;
5980
5981 htab = ppc_hash_table (info);
5982
5983 /* Deal with function syms. */
5984 if (h->type == STT_FUNC
5985 || h->needs_plt)
5986 {
5987 /* Clear procedure linkage table information for any symbol that
5988 won't need a .plt entry. */
5989 struct plt_entry *ent;
5990 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5991 if (ent->plt.refcount > 0)
5992 break;
5993 if (ent == NULL
5994 || SYMBOL_CALLS_LOCAL (info, h)
5995 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5996 && h->root.type == bfd_link_hash_undefweak))
5997 {
5998 h->plt.plist = NULL;
5999 h->needs_plt = 0;
6000 }
6001 }
6002 else
6003 h->plt.plist = NULL;
6004
6005 /* If this is a weak symbol, and there is a real definition, the
6006 processor independent code will have arranged for us to see the
6007 real definition first, and we can just use the same value. */
6008 if (h->u.weakdef != NULL)
6009 {
6010 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6011 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6012 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6013 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6014 if (ELIMINATE_COPY_RELOCS)
6015 h->non_got_ref = h->u.weakdef->non_got_ref;
6016 return TRUE;
6017 }
6018
6019 /* If we are creating a shared library, we must presume that the
6020 only references to the symbol are via the global offset table.
6021 For such cases we need not do anything here; the relocations will
6022 be handled correctly by relocate_section. */
6023 if (info->shared)
6024 return TRUE;
6025
6026 /* If there are no references to this symbol that do not use the
6027 GOT, we don't need to generate a copy reloc. */
6028 if (!h->non_got_ref)
6029 return TRUE;
6030
6031 /* Don't generate a copy reloc for symbols defined in the executable. */
6032 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6033 return TRUE;
6034
6035 if (ELIMINATE_COPY_RELOCS)
6036 {
6037 struct ppc_link_hash_entry * eh;
6038 struct ppc_dyn_relocs *p;
6039
6040 eh = (struct ppc_link_hash_entry *) h;
6041 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6042 {
6043 s = p->sec->output_section;
6044 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6045 break;
6046 }
6047
6048 /* If we didn't find any dynamic relocs in read-only sections, then
6049 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6050 if (p == NULL)
6051 {
6052 h->non_got_ref = 0;
6053 return TRUE;
6054 }
6055 }
6056
6057 if (h->plt.plist != NULL)
6058 {
6059 /* We should never get here, but unfortunately there are versions
6060 of gcc out there that improperly (for this ABI) put initialized
6061 function pointers, vtable refs and suchlike in read-only
6062 sections. Allow them to proceed, but warn that this might
6063 break at runtime. */
6064 (*_bfd_error_handler)
6065 (_("copy reloc against `%s' requires lazy plt linking; "
6066 "avoid setting LD_BIND_NOW=1 or upgrade gcc"),
6067 h->root.root.string);
6068 }
6069
6070 /* This is a reference to a symbol defined by a dynamic object which
6071 is not a function. */
6072
6073 if (h->size == 0)
6074 {
6075 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
6076 h->root.root.string);
6077 return TRUE;
6078 }
6079
6080 /* We must allocate the symbol in our .dynbss section, which will
6081 become part of the .bss section of the executable. There will be
6082 an entry for this symbol in the .dynsym section. The dynamic
6083 object will contain position independent code, so all references
6084 from the dynamic object to this symbol will go through the global
6085 offset table. The dynamic linker will use the .dynsym entry to
6086 determine the address it must put in the global offset table, so
6087 both the dynamic object and the regular object will refer to the
6088 same memory location for the variable. */
6089
6090 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6091 to copy the initial value out of the dynamic object and into the
6092 runtime process image. We need to remember the offset into the
6093 .rela.bss section we are going to use. */
6094 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6095 {
6096 htab->relbss->size += sizeof (Elf64_External_Rela);
6097 h->needs_copy = 1;
6098 }
6099
6100 s = htab->dynbss;
6101
6102 return _bfd_elf_adjust_dynamic_copy (h, s);
6103 }
6104
6105 /* If given a function descriptor symbol, hide both the function code
6106 sym and the descriptor. */
6107 static void
6108 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6109 struct elf_link_hash_entry *h,
6110 bfd_boolean force_local)
6111 {
6112 struct ppc_link_hash_entry *eh;
6113 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6114
6115 eh = (struct ppc_link_hash_entry *) h;
6116 if (eh->is_func_descriptor)
6117 {
6118 struct ppc_link_hash_entry *fh = eh->oh;
6119
6120 if (fh == NULL)
6121 {
6122 const char *p, *q;
6123 struct ppc_link_hash_table *htab;
6124 char save;
6125
6126 /* We aren't supposed to use alloca in BFD because on
6127 systems which do not have alloca the version in libiberty
6128 calls xmalloc, which might cause the program to crash
6129 when it runs out of memory. This function doesn't have a
6130 return status, so there's no way to gracefully return an
6131 error. So cheat. We know that string[-1] can be safely
6132 accessed; It's either a string in an ELF string table,
6133 or allocated in an objalloc structure. */
6134
6135 p = eh->elf.root.root.string - 1;
6136 save = *p;
6137 *(char *) p = '.';
6138 htab = ppc_hash_table (info);
6139 fh = (struct ppc_link_hash_entry *)
6140 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6141 *(char *) p = save;
6142
6143 /* Unfortunately, if it so happens that the string we were
6144 looking for was allocated immediately before this string,
6145 then we overwrote the string terminator. That's the only
6146 reason the lookup should fail. */
6147 if (fh == NULL)
6148 {
6149 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6150 while (q >= eh->elf.root.root.string && *q == *p)
6151 --q, --p;
6152 if (q < eh->elf.root.root.string && *p == '.')
6153 fh = (struct ppc_link_hash_entry *)
6154 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6155 }
6156 if (fh != NULL)
6157 {
6158 eh->oh = fh;
6159 fh->oh = eh;
6160 }
6161 }
6162 if (fh != NULL)
6163 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6164 }
6165 }
6166
6167 static bfd_boolean
6168 get_sym_h (struct elf_link_hash_entry **hp,
6169 Elf_Internal_Sym **symp,
6170 asection **symsecp,
6171 char **tls_maskp,
6172 Elf_Internal_Sym **locsymsp,
6173 unsigned long r_symndx,
6174 bfd *ibfd)
6175 {
6176 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6177
6178 if (r_symndx >= symtab_hdr->sh_info)
6179 {
6180 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6181 struct elf_link_hash_entry *h;
6182
6183 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6184 while (h->root.type == bfd_link_hash_indirect
6185 || h->root.type == bfd_link_hash_warning)
6186 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6187
6188 if (hp != NULL)
6189 *hp = h;
6190
6191 if (symp != NULL)
6192 *symp = NULL;
6193
6194 if (symsecp != NULL)
6195 {
6196 asection *symsec = NULL;
6197 if (h->root.type == bfd_link_hash_defined
6198 || h->root.type == bfd_link_hash_defweak)
6199 symsec = h->root.u.def.section;
6200 *symsecp = symsec;
6201 }
6202
6203 if (tls_maskp != NULL)
6204 {
6205 struct ppc_link_hash_entry *eh;
6206
6207 eh = (struct ppc_link_hash_entry *) h;
6208 *tls_maskp = &eh->tls_mask;
6209 }
6210 }
6211 else
6212 {
6213 Elf_Internal_Sym *sym;
6214 Elf_Internal_Sym *locsyms = *locsymsp;
6215
6216 if (locsyms == NULL)
6217 {
6218 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6219 if (locsyms == NULL)
6220 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6221 symtab_hdr->sh_info,
6222 0, NULL, NULL, NULL);
6223 if (locsyms == NULL)
6224 return FALSE;
6225 *locsymsp = locsyms;
6226 }
6227 sym = locsyms + r_symndx;
6228
6229 if (hp != NULL)
6230 *hp = NULL;
6231
6232 if (symp != NULL)
6233 *symp = sym;
6234
6235 if (symsecp != NULL)
6236 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6237
6238 if (tls_maskp != NULL)
6239 {
6240 struct got_entry **lgot_ents;
6241 char *tls_mask;
6242
6243 tls_mask = NULL;
6244 lgot_ents = elf_local_got_ents (ibfd);
6245 if (lgot_ents != NULL)
6246 {
6247 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info);
6248 tls_mask = &lgot_masks[r_symndx];
6249 }
6250 *tls_maskp = tls_mask;
6251 }
6252 }
6253 return TRUE;
6254 }
6255
6256 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6257 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6258 type suitable for optimization, and 1 otherwise. */
6259
6260 static int
6261 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx,
6262 Elf_Internal_Sym **locsymsp,
6263 const Elf_Internal_Rela *rel, bfd *ibfd)
6264 {
6265 unsigned long r_symndx;
6266 int next_r;
6267 struct elf_link_hash_entry *h;
6268 Elf_Internal_Sym *sym;
6269 asection *sec;
6270 bfd_vma off;
6271
6272 r_symndx = ELF64_R_SYM (rel->r_info);
6273 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6274 return 0;
6275
6276 if ((*tls_maskp != NULL && **tls_maskp != 0)
6277 || sec == NULL
6278 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6279 return 1;
6280
6281 /* Look inside a TOC section too. */
6282 if (h != NULL)
6283 {
6284 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6285 off = h->root.u.def.value;
6286 }
6287 else
6288 off = sym->st_value;
6289 off += rel->r_addend;
6290 BFD_ASSERT (off % 8 == 0);
6291 r_symndx = ppc64_elf_section_data (sec)->u.t_symndx[off / 8];
6292 next_r = ppc64_elf_section_data (sec)->u.t_symndx[off / 8 + 1];
6293 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6294 return 0;
6295 if (toc_symndx != NULL)
6296 *toc_symndx = r_symndx;
6297 if ((h == NULL
6298 || ((h->root.type == bfd_link_hash_defined
6299 || h->root.type == bfd_link_hash_defweak)
6300 && !h->def_dynamic))
6301 && (next_r == -1 || next_r == -2))
6302 return 1 - next_r;
6303 return 1;
6304 }
6305
6306 /* Adjust all global syms defined in opd sections. In gcc generated
6307 code for the old ABI, these will already have been done. */
6308
6309 static bfd_boolean
6310 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6311 {
6312 struct ppc_link_hash_entry *eh;
6313 asection *sym_sec;
6314 struct _opd_sec_data *opd;
6315
6316 if (h->root.type == bfd_link_hash_indirect)
6317 return TRUE;
6318
6319 if (h->root.type == bfd_link_hash_warning)
6320 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6321
6322 if (h->root.type != bfd_link_hash_defined
6323 && h->root.type != bfd_link_hash_defweak)
6324 return TRUE;
6325
6326 eh = (struct ppc_link_hash_entry *) h;
6327 if (eh->adjust_done)
6328 return TRUE;
6329
6330 sym_sec = eh->elf.root.u.def.section;
6331 opd = get_opd_info (sym_sec);
6332 if (opd != NULL && opd->adjust != NULL)
6333 {
6334 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6335 if (adjust == -1)
6336 {
6337 /* This entry has been deleted. */
6338 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6339 if (dsec == NULL)
6340 {
6341 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6342 if (elf_discarded_section (dsec))
6343 {
6344 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6345 break;
6346 }
6347 }
6348 eh->elf.root.u.def.value = 0;
6349 eh->elf.root.u.def.section = dsec;
6350 }
6351 else
6352 eh->elf.root.u.def.value += adjust;
6353 eh->adjust_done = 1;
6354 }
6355 return TRUE;
6356 }
6357
6358 /* Handles decrementing dynamic reloc counts for the reloc specified by
6359 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6360 have already been determined. */
6361
6362 static bfd_boolean
6363 dec_dynrel_count (bfd_vma r_info,
6364 asection *sec,
6365 struct bfd_link_info *info,
6366 Elf_Internal_Sym **local_syms,
6367 struct elf_link_hash_entry *h,
6368 asection *sym_sec)
6369 {
6370 enum elf_ppc64_reloc_type r_type;
6371 struct ppc_dyn_relocs *p;
6372 struct ppc_dyn_relocs **pp;
6373
6374 /* Can this reloc be dynamic? This switch, and later tests here
6375 should be kept in sync with the code in check_relocs. */
6376 r_type = ELF64_R_TYPE (r_info);
6377 switch (r_type)
6378 {
6379 default:
6380 return TRUE;
6381
6382 case R_PPC64_TPREL16:
6383 case R_PPC64_TPREL16_LO:
6384 case R_PPC64_TPREL16_HI:
6385 case R_PPC64_TPREL16_HA:
6386 case R_PPC64_TPREL16_DS:
6387 case R_PPC64_TPREL16_LO_DS:
6388 case R_PPC64_TPREL16_HIGHER:
6389 case R_PPC64_TPREL16_HIGHERA:
6390 case R_PPC64_TPREL16_HIGHEST:
6391 case R_PPC64_TPREL16_HIGHESTA:
6392 if (!info->shared)
6393 return TRUE;
6394
6395 case R_PPC64_TPREL64:
6396 case R_PPC64_DTPMOD64:
6397 case R_PPC64_DTPREL64:
6398 case R_PPC64_ADDR64:
6399 case R_PPC64_REL30:
6400 case R_PPC64_REL32:
6401 case R_PPC64_REL64:
6402 case R_PPC64_ADDR14:
6403 case R_PPC64_ADDR14_BRNTAKEN:
6404 case R_PPC64_ADDR14_BRTAKEN:
6405 case R_PPC64_ADDR16:
6406 case R_PPC64_ADDR16_DS:
6407 case R_PPC64_ADDR16_HA:
6408 case R_PPC64_ADDR16_HI:
6409 case R_PPC64_ADDR16_HIGHER:
6410 case R_PPC64_ADDR16_HIGHERA:
6411 case R_PPC64_ADDR16_HIGHEST:
6412 case R_PPC64_ADDR16_HIGHESTA:
6413 case R_PPC64_ADDR16_LO:
6414 case R_PPC64_ADDR16_LO_DS:
6415 case R_PPC64_ADDR24:
6416 case R_PPC64_ADDR32:
6417 case R_PPC64_UADDR16:
6418 case R_PPC64_UADDR32:
6419 case R_PPC64_UADDR64:
6420 case R_PPC64_TOC:
6421 break;
6422 }
6423
6424 if (local_syms != NULL)
6425 {
6426 unsigned long r_symndx;
6427 Elf_Internal_Sym *sym;
6428 bfd *ibfd = sec->owner;
6429
6430 r_symndx = ELF64_R_SYM (r_info);
6431 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6432 return FALSE;
6433 }
6434
6435 if ((info->shared
6436 && (must_be_dyn_reloc (info, r_type)
6437 || (h != NULL
6438 && (!info->symbolic
6439 || h->root.type == bfd_link_hash_defweak
6440 || !h->def_regular))))
6441 || (ELIMINATE_COPY_RELOCS
6442 && !info->shared
6443 && h != NULL
6444 && (h->root.type == bfd_link_hash_defweak
6445 || !h->def_regular)))
6446 ;
6447 else
6448 return TRUE;
6449
6450 if (h != NULL)
6451 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6452 else
6453 {
6454 if (sym_sec != NULL)
6455 {
6456 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6457 pp = (struct ppc_dyn_relocs **) vpp;
6458 }
6459 else
6460 {
6461 void *vpp = &elf_section_data (sec)->local_dynrel;
6462 pp = (struct ppc_dyn_relocs **) vpp;
6463 }
6464
6465 /* elf_gc_sweep may have already removed all dyn relocs associated
6466 with local syms for a given section. Don't report a dynreloc
6467 miscount. */
6468 if (*pp == NULL)
6469 return TRUE;
6470 }
6471
6472 while ((p = *pp) != NULL)
6473 {
6474 if (p->sec == sec)
6475 {
6476 if (!must_be_dyn_reloc (info, r_type))
6477 p->pc_count -= 1;
6478 p->count -= 1;
6479 if (p->count == 0)
6480 *pp = p->next;
6481 return TRUE;
6482 }
6483 pp = &p->next;
6484 }
6485
6486 (*_bfd_error_handler) (_("dynreloc miscount for %B, section %A"),
6487 sec->owner, sec);
6488 bfd_set_error (bfd_error_bad_value);
6489 return FALSE;
6490 }
6491
6492 /* Remove unused Official Procedure Descriptor entries. Currently we
6493 only remove those associated with functions in discarded link-once
6494 sections, or weakly defined functions that have been overridden. It
6495 would be possible to remove many more entries for statically linked
6496 applications. */
6497
6498 bfd_boolean
6499 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info,
6500 bfd_boolean non_overlapping)
6501 {
6502 bfd *ibfd;
6503 bfd_boolean some_edited = FALSE;
6504 asection *need_pad = NULL;
6505
6506 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6507 {
6508 asection *sec;
6509 Elf_Internal_Rela *relstart, *rel, *relend;
6510 Elf_Internal_Shdr *symtab_hdr;
6511 Elf_Internal_Sym *local_syms;
6512 struct elf_link_hash_entry **sym_hashes;
6513 bfd_vma offset;
6514 struct _opd_sec_data *opd;
6515 bfd_boolean need_edit, add_aux_fields;
6516 bfd_size_type cnt_16b = 0;
6517
6518 sec = bfd_get_section_by_name (ibfd, ".opd");
6519 if (sec == NULL || sec->size == 0)
6520 continue;
6521
6522 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6523 continue;
6524
6525 if (sec->output_section == bfd_abs_section_ptr)
6526 continue;
6527
6528 /* Look through the section relocs. */
6529 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6530 continue;
6531
6532 local_syms = NULL;
6533 symtab_hdr = &elf_symtab_hdr (ibfd);
6534 sym_hashes = elf_sym_hashes (ibfd);
6535
6536 /* Read the relocations. */
6537 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6538 info->keep_memory);
6539 if (relstart == NULL)
6540 return FALSE;
6541
6542 /* First run through the relocs to check they are sane, and to
6543 determine whether we need to edit this opd section. */
6544 need_edit = FALSE;
6545 need_pad = sec;
6546 offset = 0;
6547 relend = relstart + sec->reloc_count;
6548 for (rel = relstart; rel < relend; )
6549 {
6550 enum elf_ppc64_reloc_type r_type;
6551 unsigned long r_symndx;
6552 asection *sym_sec;
6553 struct elf_link_hash_entry *h;
6554 Elf_Internal_Sym *sym;
6555
6556 /* .opd contains a regular array of 16 or 24 byte entries. We're
6557 only interested in the reloc pointing to a function entry
6558 point. */
6559 if (rel->r_offset != offset
6560 || rel + 1 >= relend
6561 || (rel + 1)->r_offset != offset + 8)
6562 {
6563 /* If someone messes with .opd alignment then after a
6564 "ld -r" we might have padding in the middle of .opd.
6565 Also, there's nothing to prevent someone putting
6566 something silly in .opd with the assembler. No .opd
6567 optimization for them! */
6568 broken_opd:
6569 (*_bfd_error_handler)
6570 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6571 need_edit = FALSE;
6572 break;
6573 }
6574
6575 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6576 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6577 {
6578 (*_bfd_error_handler)
6579 (_("%B: unexpected reloc type %u in .opd section"),
6580 ibfd, r_type);
6581 need_edit = FALSE;
6582 break;
6583 }
6584
6585 r_symndx = ELF64_R_SYM (rel->r_info);
6586 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6587 r_symndx, ibfd))
6588 goto error_ret;
6589
6590 if (sym_sec == NULL || sym_sec->owner == NULL)
6591 {
6592 const char *sym_name;
6593 if (h != NULL)
6594 sym_name = h->root.root.string;
6595 else
6596 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
6597 sym_sec);
6598
6599 (*_bfd_error_handler)
6600 (_("%B: undefined sym `%s' in .opd section"),
6601 ibfd, sym_name);
6602 need_edit = FALSE;
6603 break;
6604 }
6605
6606 /* opd entries are always for functions defined in the
6607 current input bfd. If the symbol isn't defined in the
6608 input bfd, then we won't be using the function in this
6609 bfd; It must be defined in a linkonce section in another
6610 bfd, or is weak. It's also possible that we are
6611 discarding the function due to a linker script /DISCARD/,
6612 which we test for via the output_section. */
6613 if (sym_sec->owner != ibfd
6614 || sym_sec->output_section == bfd_abs_section_ptr)
6615 need_edit = TRUE;
6616
6617 rel += 2;
6618 if (rel == relend
6619 || (rel + 1 == relend && rel->r_offset == offset + 16))
6620 {
6621 if (sec->size == offset + 24)
6622 {
6623 need_pad = NULL;
6624 break;
6625 }
6626 if (rel == relend && sec->size == offset + 16)
6627 {
6628 cnt_16b++;
6629 break;
6630 }
6631 goto broken_opd;
6632 }
6633
6634 if (rel->r_offset == offset + 24)
6635 offset += 24;
6636 else if (rel->r_offset != offset + 16)
6637 goto broken_opd;
6638 else if (rel + 1 < relend
6639 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
6640 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
6641 {
6642 offset += 16;
6643 cnt_16b++;
6644 }
6645 else if (rel + 2 < relend
6646 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
6647 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
6648 {
6649 offset += 24;
6650 rel += 1;
6651 }
6652 else
6653 goto broken_opd;
6654 }
6655
6656 add_aux_fields = non_overlapping && cnt_16b > 0;
6657
6658 if (need_edit || add_aux_fields)
6659 {
6660 Elf_Internal_Rela *write_rel;
6661 bfd_byte *rptr, *wptr;
6662 bfd_byte *new_contents = NULL;
6663 bfd_boolean skip;
6664 long opd_ent_size;
6665 bfd_size_type amt;
6666
6667 amt = sec->size * sizeof (long) / 8;
6668 opd = &ppc64_elf_section_data (sec)->u.opd;
6669 opd->adjust = bfd_zalloc (obfd, amt);
6670 if (opd->adjust == NULL)
6671 return FALSE;
6672 ppc64_elf_section_data (sec)->sec_type = sec_opd;
6673
6674 /* This seems a waste of time as input .opd sections are all
6675 zeros as generated by gcc, but I suppose there's no reason
6676 this will always be so. We might start putting something in
6677 the third word of .opd entries. */
6678 if ((sec->flags & SEC_IN_MEMORY) == 0)
6679 {
6680 bfd_byte *loc;
6681 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
6682 {
6683 if (loc != NULL)
6684 free (loc);
6685 error_ret:
6686 if (local_syms != NULL
6687 && symtab_hdr->contents != (unsigned char *) local_syms)
6688 free (local_syms);
6689 if (elf_section_data (sec)->relocs != relstart)
6690 free (relstart);
6691 return FALSE;
6692 }
6693 sec->contents = loc;
6694 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6695 }
6696
6697 elf_section_data (sec)->relocs = relstart;
6698
6699 new_contents = sec->contents;
6700 if (add_aux_fields)
6701 {
6702 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
6703 if (new_contents == NULL)
6704 return FALSE;
6705 need_pad = FALSE;
6706 }
6707 wptr = new_contents;
6708 rptr = sec->contents;
6709
6710 write_rel = relstart;
6711 skip = FALSE;
6712 offset = 0;
6713 opd_ent_size = 0;
6714 for (rel = relstart; rel < relend; rel++)
6715 {
6716 unsigned long r_symndx;
6717 asection *sym_sec;
6718 struct elf_link_hash_entry *h;
6719 Elf_Internal_Sym *sym;
6720
6721 r_symndx = ELF64_R_SYM (rel->r_info);
6722 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6723 r_symndx, ibfd))
6724 goto error_ret;
6725
6726 if (rel->r_offset == offset)
6727 {
6728 struct ppc_link_hash_entry *fdh = NULL;
6729
6730 /* See if the .opd entry is full 24 byte or
6731 16 byte (with fd_aux entry overlapped with next
6732 fd_func). */
6733 opd_ent_size = 24;
6734 if ((rel + 2 == relend && sec->size == offset + 16)
6735 || (rel + 3 < relend
6736 && rel[2].r_offset == offset + 16
6737 && rel[3].r_offset == offset + 24
6738 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
6739 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
6740 opd_ent_size = 16;
6741
6742 if (h != NULL
6743 && h->root.root.string[0] == '.')
6744 {
6745 fdh = get_fdh ((struct ppc_link_hash_entry *) h,
6746 ppc_hash_table (info));
6747 if (fdh != NULL
6748 && fdh->elf.root.type != bfd_link_hash_defined
6749 && fdh->elf.root.type != bfd_link_hash_defweak)
6750 fdh = NULL;
6751 }
6752
6753 skip = (sym_sec->owner != ibfd
6754 || sym_sec->output_section == bfd_abs_section_ptr);
6755 if (skip)
6756 {
6757 if (fdh != NULL && sym_sec->owner == ibfd)
6758 {
6759 /* Arrange for the function descriptor sym
6760 to be dropped. */
6761 fdh->elf.root.u.def.value = 0;
6762 fdh->elf.root.u.def.section = sym_sec;
6763 }
6764 opd->adjust[rel->r_offset / 8] = -1;
6765 }
6766 else
6767 {
6768 /* We'll be keeping this opd entry. */
6769
6770 if (fdh != NULL)
6771 {
6772 /* Redefine the function descriptor symbol to
6773 this location in the opd section. It is
6774 necessary to update the value here rather
6775 than using an array of adjustments as we do
6776 for local symbols, because various places
6777 in the generic ELF code use the value
6778 stored in u.def.value. */
6779 fdh->elf.root.u.def.value = wptr - new_contents;
6780 fdh->adjust_done = 1;
6781 }
6782
6783 /* Local syms are a bit tricky. We could
6784 tweak them as they can be cached, but
6785 we'd need to look through the local syms
6786 for the function descriptor sym which we
6787 don't have at the moment. So keep an
6788 array of adjustments. */
6789 opd->adjust[rel->r_offset / 8]
6790 = (wptr - new_contents) - (rptr - sec->contents);
6791
6792 if (wptr != rptr)
6793 memcpy (wptr, rptr, opd_ent_size);
6794 wptr += opd_ent_size;
6795 if (add_aux_fields && opd_ent_size == 16)
6796 {
6797 memset (wptr, '\0', 8);
6798 wptr += 8;
6799 }
6800 }
6801 rptr += opd_ent_size;
6802 offset += opd_ent_size;
6803 }
6804
6805 if (skip)
6806 {
6807 if (!NO_OPD_RELOCS
6808 && !info->relocatable
6809 && !dec_dynrel_count (rel->r_info, sec, info,
6810 NULL, h, sym_sec))
6811 goto error_ret;
6812 }
6813 else
6814 {
6815 /* We need to adjust any reloc offsets to point to the
6816 new opd entries. While we're at it, we may as well
6817 remove redundant relocs. */
6818 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
6819 if (write_rel != rel)
6820 memcpy (write_rel, rel, sizeof (*rel));
6821 ++write_rel;
6822 }
6823 }
6824
6825 sec->size = wptr - new_contents;
6826 sec->reloc_count = write_rel - relstart;
6827 if (add_aux_fields)
6828 {
6829 free (sec->contents);
6830 sec->contents = new_contents;
6831 }
6832
6833 /* Fudge the header size too, as this is used later in
6834 elf_bfd_final_link if we are emitting relocs. */
6835 elf_section_data (sec)->rel_hdr.sh_size
6836 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize;
6837 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL);
6838 some_edited = TRUE;
6839 }
6840 else if (elf_section_data (sec)->relocs != relstart)
6841 free (relstart);
6842
6843 if (local_syms != NULL
6844 && symtab_hdr->contents != (unsigned char *) local_syms)
6845 {
6846 if (!info->keep_memory)
6847 free (local_syms);
6848 else
6849 symtab_hdr->contents = (unsigned char *) local_syms;
6850 }
6851 }
6852
6853 if (some_edited)
6854 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
6855
6856 /* If we are doing a final link and the last .opd entry is just 16 byte
6857 long, add a 8 byte padding after it. */
6858 if (need_pad != NULL && !info->relocatable)
6859 {
6860 bfd_byte *p;
6861
6862 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
6863 {
6864 BFD_ASSERT (need_pad->size > 0);
6865
6866 p = bfd_malloc (need_pad->size + 8);
6867 if (p == NULL)
6868 return FALSE;
6869
6870 if (! bfd_get_section_contents (need_pad->owner, need_pad,
6871 p, 0, need_pad->size))
6872 return FALSE;
6873
6874 need_pad->contents = p;
6875 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
6876 }
6877 else
6878 {
6879 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
6880 if (p == NULL)
6881 return FALSE;
6882
6883 need_pad->contents = p;
6884 }
6885
6886 memset (need_pad->contents + need_pad->size, 0, 8);
6887 need_pad->size += 8;
6888 }
6889
6890 return TRUE;
6891 }
6892
6893 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
6894
6895 asection *
6896 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
6897 {
6898 struct ppc_link_hash_table *htab;
6899
6900 htab = ppc_hash_table (info);
6901 if (htab->tls_get_addr != NULL)
6902 {
6903 struct ppc_link_hash_entry *h = htab->tls_get_addr;
6904
6905 while (h->elf.root.type == bfd_link_hash_indirect
6906 || h->elf.root.type == bfd_link_hash_warning)
6907 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6908
6909 htab->tls_get_addr = h;
6910
6911 if (htab->tls_get_addr_fd == NULL
6912 && h->oh != NULL
6913 && h->oh->is_func_descriptor
6914 && (h->oh->elf.root.type == bfd_link_hash_defined
6915 || h->oh->elf.root.type == bfd_link_hash_defweak))
6916 htab->tls_get_addr_fd = h->oh;
6917 }
6918
6919 if (htab->tls_get_addr_fd != NULL)
6920 {
6921 struct ppc_link_hash_entry *h = htab->tls_get_addr_fd;
6922
6923 while (h->elf.root.type == bfd_link_hash_indirect
6924 || h->elf.root.type == bfd_link_hash_warning)
6925 h = (struct ppc_link_hash_entry *) h->elf.root.u.i.link;
6926
6927 htab->tls_get_addr_fd = h;
6928 }
6929
6930 return _bfd_elf_tls_setup (obfd, info);
6931 }
6932
6933 /* Run through all the TLS relocs looking for optimization
6934 opportunities. The linker has been hacked (see ppc64elf.em) to do
6935 a preliminary section layout so that we know the TLS segment
6936 offsets. We can't optimize earlier because some optimizations need
6937 to know the tp offset, and we need to optimize before allocating
6938 dynamic relocations. */
6939
6940 bfd_boolean
6941 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
6942 {
6943 bfd *ibfd;
6944 asection *sec;
6945 struct ppc_link_hash_table *htab;
6946 int pass;
6947
6948 if (info->relocatable || !info->executable)
6949 return TRUE;
6950
6951 htab = ppc_hash_table (info);
6952 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6953 {
6954 Elf_Internal_Sym *locsyms = NULL;
6955 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
6956 unsigned char *toc_ref = NULL;
6957
6958 /* Look at all the sections for this file. Make two passes over
6959 the relocs. On the first pass, mark toc entries involved
6960 with tls relocs, and check that tls relocs involved in
6961 setting up a tls_get_addr call are indeed followed by such a
6962 call. If they are not, exclude them from the optimizations
6963 done on the second pass. */
6964 for (pass = 0; pass < 2; ++pass)
6965 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6966 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
6967 {
6968 Elf_Internal_Rela *relstart, *rel, *relend;
6969
6970 /* Read the relocations. */
6971 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6972 info->keep_memory);
6973 if (relstart == NULL)
6974 return FALSE;
6975
6976 relend = relstart + sec->reloc_count;
6977 for (rel = relstart; rel < relend; rel++)
6978 {
6979 enum elf_ppc64_reloc_type r_type;
6980 unsigned long r_symndx;
6981 struct elf_link_hash_entry *h;
6982 Elf_Internal_Sym *sym;
6983 asection *sym_sec;
6984 char *tls_mask;
6985 char tls_set, tls_clear, tls_type = 0;
6986 bfd_vma value;
6987 bfd_boolean ok_tprel, is_local;
6988 long toc_ref_index = 0;
6989 int expecting_tls_get_addr = 0;
6990
6991 r_symndx = ELF64_R_SYM (rel->r_info);
6992 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
6993 r_symndx, ibfd))
6994 {
6995 err_free_rel:
6996 if (elf_section_data (sec)->relocs != relstart)
6997 free (relstart);
6998 if (toc_ref != NULL)
6999 free (toc_ref);
7000 if (locsyms != NULL
7001 && (elf_symtab_hdr (ibfd).contents
7002 != (unsigned char *) locsyms))
7003 free (locsyms);
7004 return FALSE;
7005 }
7006
7007 if (h != NULL)
7008 {
7009 if (h->root.type != bfd_link_hash_defined
7010 && h->root.type != bfd_link_hash_defweak)
7011 continue;
7012 value = h->root.u.def.value;
7013 }
7014 else
7015 /* Symbols referenced by TLS relocs must be of type
7016 STT_TLS. So no need for .opd local sym adjust. */
7017 value = sym->st_value;
7018
7019 ok_tprel = FALSE;
7020 is_local = FALSE;
7021 if (h == NULL
7022 || !h->def_dynamic)
7023 {
7024 is_local = TRUE;
7025 value += sym_sec->output_offset;
7026 value += sym_sec->output_section->vma;
7027 value -= htab->elf.tls_sec->vma;
7028 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7029 < (bfd_vma) 1 << 32);
7030 }
7031
7032 r_type = ELF64_R_TYPE (rel->r_info);
7033 switch (r_type)
7034 {
7035 case R_PPC64_GOT_TLSLD16:
7036 case R_PPC64_GOT_TLSLD16_LO:
7037 expecting_tls_get_addr = 1;
7038 /* Fall thru */
7039
7040 case R_PPC64_GOT_TLSLD16_HI:
7041 case R_PPC64_GOT_TLSLD16_HA:
7042 /* These relocs should never be against a symbol
7043 defined in a shared lib. Leave them alone if
7044 that turns out to be the case. */
7045 if (!is_local)
7046 continue;
7047
7048 /* LD -> LE */
7049 tls_set = 0;
7050 tls_clear = TLS_LD;
7051 tls_type = TLS_TLS | TLS_LD;
7052 break;
7053
7054 case R_PPC64_GOT_TLSGD16:
7055 case R_PPC64_GOT_TLSGD16_LO:
7056 expecting_tls_get_addr = 1;
7057 /* Fall thru */
7058
7059 case R_PPC64_GOT_TLSGD16_HI:
7060 case R_PPC64_GOT_TLSGD16_HA:
7061 if (ok_tprel)
7062 /* GD -> LE */
7063 tls_set = 0;
7064 else
7065 /* GD -> IE */
7066 tls_set = TLS_TLS | TLS_TPRELGD;
7067 tls_clear = TLS_GD;
7068 tls_type = TLS_TLS | TLS_GD;
7069 break;
7070
7071 case R_PPC64_GOT_TPREL16_DS:
7072 case R_PPC64_GOT_TPREL16_LO_DS:
7073 case R_PPC64_GOT_TPREL16_HI:
7074 case R_PPC64_GOT_TPREL16_HA:
7075 if (ok_tprel)
7076 {
7077 /* IE -> LE */
7078 tls_set = 0;
7079 tls_clear = TLS_TPREL;
7080 tls_type = TLS_TLS | TLS_TPREL;
7081 break;
7082 }
7083 continue;
7084
7085 case R_PPC64_TOC16:
7086 case R_PPC64_TOC16_LO:
7087 case R_PPC64_TLS:
7088 if (sym_sec == NULL || sym_sec != toc)
7089 continue;
7090
7091 /* Mark this toc entry as referenced by a TLS
7092 code sequence. We can do that now in the
7093 case of R_PPC64_TLS, and after checking for
7094 tls_get_addr for the TOC16 relocs. */
7095 if (toc_ref == NULL)
7096 {
7097 toc_ref = bfd_zmalloc (toc->size / 8);
7098 if (toc_ref == NULL)
7099 goto err_free_rel;
7100 }
7101 if (h != NULL)
7102 value = h->root.u.def.value;
7103 else
7104 value = sym->st_value;
7105 value += rel->r_addend;
7106 BFD_ASSERT (value < toc->size && value % 8 == 0);
7107 toc_ref_index = value / 8;
7108 if (r_type == R_PPC64_TLS)
7109 {
7110 toc_ref[toc_ref_index] = 1;
7111 continue;
7112 }
7113
7114 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7115 continue;
7116
7117 tls_set = 0;
7118 tls_clear = 0;
7119 expecting_tls_get_addr = 2;
7120 break;
7121
7122 case R_PPC64_TPREL64:
7123 if (pass == 0
7124 || sec != toc
7125 || toc_ref == NULL
7126 || !toc_ref[rel->r_offset / 8])
7127 continue;
7128 if (ok_tprel)
7129 {
7130 /* IE -> LE */
7131 tls_set = TLS_EXPLICIT;
7132 tls_clear = TLS_TPREL;
7133 break;
7134 }
7135 continue;
7136
7137 case R_PPC64_DTPMOD64:
7138 if (pass == 0
7139 || sec != toc
7140 || toc_ref == NULL
7141 || !toc_ref[rel->r_offset / 8])
7142 continue;
7143 if (rel + 1 < relend
7144 && (rel[1].r_info
7145 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7146 && rel[1].r_offset == rel->r_offset + 8)
7147 {
7148 if (ok_tprel)
7149 /* GD -> LE */
7150 tls_set = TLS_EXPLICIT | TLS_GD;
7151 else
7152 /* GD -> IE */
7153 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7154 tls_clear = TLS_GD;
7155 }
7156 else
7157 {
7158 if (!is_local)
7159 continue;
7160
7161 /* LD -> LE */
7162 tls_set = TLS_EXPLICIT;
7163 tls_clear = TLS_LD;
7164 }
7165 break;
7166
7167 default:
7168 continue;
7169 }
7170
7171 if (pass == 0)
7172 {
7173 if (!expecting_tls_get_addr)
7174 continue;
7175
7176 if (rel + 1 < relend)
7177 {
7178 Elf_Internal_Shdr *symtab_hdr;
7179 enum elf_ppc64_reloc_type r_type2;
7180 unsigned long r_symndx2;
7181 struct elf_link_hash_entry *h2;
7182
7183 symtab_hdr = &elf_symtab_hdr (ibfd);
7184
7185 /* The next instruction should be a call to
7186 __tls_get_addr. Peek at the reloc to be sure. */
7187 r_type2 = ELF64_R_TYPE (rel[1].r_info);
7188 r_symndx2 = ELF64_R_SYM (rel[1].r_info);
7189 if (r_symndx2 >= symtab_hdr->sh_info
7190 && (r_type2 == R_PPC64_REL14
7191 || r_type2 == R_PPC64_REL14_BRTAKEN
7192 || r_type2 == R_PPC64_REL14_BRNTAKEN
7193 || r_type2 == R_PPC64_REL24))
7194 {
7195 struct elf_link_hash_entry **sym_hashes;
7196
7197 sym_hashes = elf_sym_hashes (ibfd);
7198
7199 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
7200 while (h2->root.type == bfd_link_hash_indirect
7201 || h2->root.type == bfd_link_hash_warning)
7202 h2 = ((struct elf_link_hash_entry *)
7203 h2->root.u.i.link);
7204 if (h2 != NULL
7205 && (h2 == &htab->tls_get_addr->elf
7206 || h2 == &htab->tls_get_addr_fd->elf))
7207 {
7208 if (expecting_tls_get_addr == 2)
7209 {
7210 /* Check for toc tls entries. */
7211 char *toc_tls;
7212 int retval;
7213
7214 retval = get_tls_mask (&toc_tls, NULL,
7215 &locsyms,
7216 rel, ibfd);
7217 if (retval == 0)
7218 goto err_free_rel;
7219 if (retval > 1 && toc_tls != NULL)
7220 toc_ref[toc_ref_index] = 1;
7221 }
7222 continue;
7223 }
7224 }
7225 }
7226
7227 if (expecting_tls_get_addr != 1)
7228 continue;
7229
7230 /* Uh oh, we didn't find the expected call. We
7231 could just mark this symbol to exclude it
7232 from tls optimization but it's safer to skip
7233 the entire section. */
7234 sec->has_tls_reloc = 0;
7235 break;
7236 }
7237
7238 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7239 {
7240 struct plt_entry *ent;
7241 for (ent = htab->tls_get_addr->elf.plt.plist;
7242 ent != NULL;
7243 ent = ent->next)
7244 if (ent->addend == 0)
7245 {
7246 if (ent->plt.refcount > 0)
7247 {
7248 ent->plt.refcount -= 1;
7249 expecting_tls_get_addr = 0;
7250 }
7251 break;
7252 }
7253 }
7254
7255 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7256 {
7257 struct plt_entry *ent;
7258 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7259 ent != NULL;
7260 ent = ent->next)
7261 if (ent->addend == 0)
7262 {
7263 if (ent->plt.refcount > 0)
7264 ent->plt.refcount -= 1;
7265 break;
7266 }
7267 }
7268
7269 if (tls_clear == 0)
7270 continue;
7271
7272 if ((tls_set & TLS_EXPLICIT) == 0)
7273 {
7274 struct got_entry *ent;
7275
7276 /* Adjust got entry for this reloc. */
7277 if (h != NULL)
7278 ent = h->got.glist;
7279 else
7280 ent = elf_local_got_ents (ibfd)[r_symndx];
7281
7282 for (; ent != NULL; ent = ent->next)
7283 if (ent->addend == rel->r_addend
7284 && ent->owner == ibfd
7285 && ent->tls_type == tls_type)
7286 break;
7287 if (ent == NULL)
7288 abort ();
7289
7290 if (tls_set == 0)
7291 {
7292 /* We managed to get rid of a got entry. */
7293 if (ent->got.refcount > 0)
7294 ent->got.refcount -= 1;
7295 }
7296 }
7297 else
7298 {
7299 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7300 we'll lose one or two dyn relocs. */
7301 if (!dec_dynrel_count (rel->r_info, sec, info,
7302 NULL, h, sym_sec))
7303 return FALSE;
7304
7305 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7306 {
7307 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7308 NULL, h, sym_sec))
7309 return FALSE;
7310 }
7311 }
7312
7313 *tls_mask |= tls_set;
7314 *tls_mask &= ~tls_clear;
7315 }
7316
7317 if (elf_section_data (sec)->relocs != relstart)
7318 free (relstart);
7319 }
7320
7321 if (toc_ref != NULL)
7322 free (toc_ref);
7323
7324 if (locsyms != NULL
7325 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7326 {
7327 if (!info->keep_memory)
7328 free (locsyms);
7329 else
7330 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7331 }
7332 }
7333 return TRUE;
7334 }
7335
7336 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7337 the values of any global symbols in a toc section that has been
7338 edited. Globals in toc sections should be a rarity, so this function
7339 sets a flag if any are found in toc sections other than the one just
7340 edited, so that futher hash table traversals can be avoided. */
7341
7342 struct adjust_toc_info
7343 {
7344 asection *toc;
7345 unsigned long *skip;
7346 bfd_boolean global_toc_syms;
7347 };
7348
7349 static bfd_boolean
7350 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7351 {
7352 struct ppc_link_hash_entry *eh;
7353 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7354
7355 if (h->root.type == bfd_link_hash_indirect)
7356 return TRUE;
7357
7358 if (h->root.type == bfd_link_hash_warning)
7359 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7360
7361 if (h->root.type != bfd_link_hash_defined
7362 && h->root.type != bfd_link_hash_defweak)
7363 return TRUE;
7364
7365 eh = (struct ppc_link_hash_entry *) h;
7366 if (eh->adjust_done)
7367 return TRUE;
7368
7369 if (eh->elf.root.u.def.section == toc_inf->toc)
7370 {
7371 unsigned long skip = toc_inf->skip[eh->elf.root.u.def.value >> 3];
7372 if (skip != (unsigned long) -1)
7373 eh->elf.root.u.def.value -= skip;
7374 else
7375 {
7376 (*_bfd_error_handler)
7377 (_("%s defined in removed toc entry"), eh->elf.root.root.string);
7378 eh->elf.root.u.def.section = &bfd_abs_section;
7379 eh->elf.root.u.def.value = 0;
7380 }
7381 eh->adjust_done = 1;
7382 }
7383 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7384 toc_inf->global_toc_syms = TRUE;
7385
7386 return TRUE;
7387 }
7388
7389 /* Examine all relocs referencing .toc sections in order to remove
7390 unused .toc entries. */
7391
7392 bfd_boolean
7393 ppc64_elf_edit_toc (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
7394 {
7395 bfd *ibfd;
7396 struct adjust_toc_info toc_inf;
7397
7398 toc_inf.global_toc_syms = TRUE;
7399 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7400 {
7401 asection *toc, *sec;
7402 Elf_Internal_Shdr *symtab_hdr;
7403 Elf_Internal_Sym *local_syms;
7404 struct elf_link_hash_entry **sym_hashes;
7405 Elf_Internal_Rela *relstart, *rel;
7406 unsigned long *skip, *drop;
7407 unsigned char *used;
7408 unsigned char *keep, last, some_unused;
7409
7410 toc = bfd_get_section_by_name (ibfd, ".toc");
7411 if (toc == NULL
7412 || toc->size == 0
7413 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7414 || elf_discarded_section (toc))
7415 continue;
7416
7417 local_syms = NULL;
7418 symtab_hdr = &elf_symtab_hdr (ibfd);
7419 sym_hashes = elf_sym_hashes (ibfd);
7420
7421 /* Look at sections dropped from the final link. */
7422 skip = NULL;
7423 relstart = NULL;
7424 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7425 {
7426 if (sec->reloc_count == 0
7427 || !elf_discarded_section (sec)
7428 || get_opd_info (sec)
7429 || (sec->flags & SEC_ALLOC) == 0
7430 || (sec->flags & SEC_DEBUGGING) != 0)
7431 continue;
7432
7433 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7434 if (relstart == NULL)
7435 goto error_ret;
7436
7437 /* Run through the relocs to see which toc entries might be
7438 unused. */
7439 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7440 {
7441 enum elf_ppc64_reloc_type r_type;
7442 unsigned long r_symndx;
7443 asection *sym_sec;
7444 struct elf_link_hash_entry *h;
7445 Elf_Internal_Sym *sym;
7446 bfd_vma val;
7447
7448 r_type = ELF64_R_TYPE (rel->r_info);
7449 switch (r_type)
7450 {
7451 default:
7452 continue;
7453
7454 case R_PPC64_TOC16:
7455 case R_PPC64_TOC16_LO:
7456 case R_PPC64_TOC16_HI:
7457 case R_PPC64_TOC16_HA:
7458 case R_PPC64_TOC16_DS:
7459 case R_PPC64_TOC16_LO_DS:
7460 break;
7461 }
7462
7463 r_symndx = ELF64_R_SYM (rel->r_info);
7464 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7465 r_symndx, ibfd))
7466 goto error_ret;
7467
7468 if (sym_sec != toc)
7469 continue;
7470
7471 if (h != NULL)
7472 val = h->root.u.def.value;
7473 else
7474 val = sym->st_value;
7475 val += rel->r_addend;
7476
7477 if (val >= toc->size)
7478 continue;
7479
7480 /* Anything in the toc ought to be aligned to 8 bytes.
7481 If not, don't mark as unused. */
7482 if (val & 7)
7483 continue;
7484
7485 if (skip == NULL)
7486 {
7487 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 7) / 8);
7488 if (skip == NULL)
7489 goto error_ret;
7490 }
7491
7492 skip[val >> 3] = 1;
7493 }
7494
7495 if (elf_section_data (sec)->relocs != relstart)
7496 free (relstart);
7497 }
7498
7499 if (skip == NULL)
7500 continue;
7501
7502 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
7503 if (used == NULL)
7504 {
7505 error_ret:
7506 if (local_syms != NULL
7507 && symtab_hdr->contents != (unsigned char *) local_syms)
7508 free (local_syms);
7509 if (sec != NULL
7510 && relstart != NULL
7511 && elf_section_data (sec)->relocs != relstart)
7512 free (relstart);
7513 if (skip != NULL)
7514 free (skip);
7515 return FALSE;
7516 }
7517
7518 /* Now check all kept sections that might reference the toc.
7519 Check the toc itself last. */
7520 for (sec = (ibfd->sections == toc && toc->next ? toc->next
7521 : ibfd->sections);
7522 sec != NULL;
7523 sec = (sec == toc ? NULL
7524 : sec->next == NULL ? toc
7525 : sec->next == toc && toc->next ? toc->next
7526 : sec->next))
7527 {
7528 int repeat;
7529
7530 if (sec->reloc_count == 0
7531 || elf_discarded_section (sec)
7532 || get_opd_info (sec)
7533 || (sec->flags & SEC_ALLOC) == 0
7534 || (sec->flags & SEC_DEBUGGING) != 0)
7535 continue;
7536
7537 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, TRUE);
7538 if (relstart == NULL)
7539 goto error_ret;
7540
7541 /* Mark toc entries referenced as used. */
7542 repeat = 0;
7543 do
7544 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7545 {
7546 enum elf_ppc64_reloc_type r_type;
7547 unsigned long r_symndx;
7548 asection *sym_sec;
7549 struct elf_link_hash_entry *h;
7550 Elf_Internal_Sym *sym;
7551 bfd_vma val;
7552
7553 r_type = ELF64_R_TYPE (rel->r_info);
7554 switch (r_type)
7555 {
7556 case R_PPC64_TOC16:
7557 case R_PPC64_TOC16_LO:
7558 case R_PPC64_TOC16_HI:
7559 case R_PPC64_TOC16_HA:
7560 case R_PPC64_TOC16_DS:
7561 case R_PPC64_TOC16_LO_DS:
7562 /* In case we're taking addresses of toc entries. */
7563 case R_PPC64_ADDR64:
7564 break;
7565
7566 default:
7567 continue;
7568 }
7569
7570 r_symndx = ELF64_R_SYM (rel->r_info);
7571 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7572 r_symndx, ibfd))
7573 {
7574 free (used);
7575 goto error_ret;
7576 }
7577
7578 if (sym_sec != toc)
7579 continue;
7580
7581 if (h != NULL)
7582 val = h->root.u.def.value;
7583 else
7584 val = sym->st_value;
7585 val += rel->r_addend;
7586
7587 if (val >= toc->size)
7588 continue;
7589
7590 /* For the toc section, we only mark as used if
7591 this entry itself isn't unused. */
7592 if (sec == toc
7593 && !used[val >> 3]
7594 && (used[rel->r_offset >> 3]
7595 || !skip[rel->r_offset >> 3]))
7596 /* Do all the relocs again, to catch reference
7597 chains. */
7598 repeat = 1;
7599
7600 used[val >> 3] = 1;
7601 }
7602 while (repeat);
7603 }
7604
7605 /* Merge the used and skip arrays. Assume that TOC
7606 doublewords not appearing as either used or unused belong
7607 to to an entry more than one doubleword in size. */
7608 for (drop = skip, keep = used, last = 0, some_unused = 0;
7609 drop < skip + (toc->size + 7) / 8;
7610 ++drop, ++keep)
7611 {
7612 if (*keep)
7613 {
7614 *drop = 0;
7615 last = 0;
7616 }
7617 else if (*drop)
7618 {
7619 some_unused = 1;
7620 last = 1;
7621 }
7622 else
7623 *drop = last;
7624 }
7625
7626 free (used);
7627
7628 if (some_unused)
7629 {
7630 bfd_byte *contents, *src;
7631 unsigned long off;
7632
7633 /* Shuffle the toc contents, and at the same time convert the
7634 skip array from booleans into offsets. */
7635 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
7636 goto error_ret;
7637
7638 elf_section_data (toc)->this_hdr.contents = contents;
7639
7640 for (src = contents, off = 0, drop = skip;
7641 src < contents + toc->size;
7642 src += 8, ++drop)
7643 {
7644 if (*drop)
7645 {
7646 *drop = (unsigned long) -1;
7647 off += 8;
7648 }
7649 else if (off != 0)
7650 {
7651 *drop = off;
7652 memcpy (src - off, src, 8);
7653 }
7654 }
7655 toc->rawsize = toc->size;
7656 toc->size = src - contents - off;
7657
7658 if (toc->reloc_count != 0)
7659 {
7660 Elf_Internal_Rela *wrel;
7661 bfd_size_type sz;
7662
7663 /* Read toc relocs. */
7664 relstart = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
7665 TRUE);
7666 if (relstart == NULL)
7667 goto error_ret;
7668
7669 /* Remove unused toc relocs, and adjust those we keep. */
7670 wrel = relstart;
7671 for (rel = relstart; rel < relstart + toc->reloc_count; ++rel)
7672 if (skip[rel->r_offset >> 3] != (unsigned long) -1)
7673 {
7674 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
7675 wrel->r_info = rel->r_info;
7676 wrel->r_addend = rel->r_addend;
7677 ++wrel;
7678 }
7679 else if (!dec_dynrel_count (rel->r_info, toc, info,
7680 &local_syms, NULL, NULL))
7681 goto error_ret;
7682
7683 toc->reloc_count = wrel - relstart;
7684 sz = elf_section_data (toc)->rel_hdr.sh_entsize;
7685 elf_section_data (toc)->rel_hdr.sh_size = toc->reloc_count * sz;
7686 BFD_ASSERT (elf_section_data (toc)->rel_hdr2 == NULL);
7687 }
7688
7689 /* Adjust addends for relocs against the toc section sym. */
7690 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7691 {
7692 if (sec->reloc_count == 0
7693 || elf_discarded_section (sec))
7694 continue;
7695
7696 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7697 TRUE);
7698 if (relstart == NULL)
7699 goto error_ret;
7700
7701 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7702 {
7703 enum elf_ppc64_reloc_type r_type;
7704 unsigned long r_symndx;
7705 asection *sym_sec;
7706 struct elf_link_hash_entry *h;
7707 Elf_Internal_Sym *sym;
7708
7709 r_type = ELF64_R_TYPE (rel->r_info);
7710 switch (r_type)
7711 {
7712 default:
7713 continue;
7714
7715 case R_PPC64_TOC16:
7716 case R_PPC64_TOC16_LO:
7717 case R_PPC64_TOC16_HI:
7718 case R_PPC64_TOC16_HA:
7719 case R_PPC64_TOC16_DS:
7720 case R_PPC64_TOC16_LO_DS:
7721 case R_PPC64_ADDR64:
7722 break;
7723 }
7724
7725 r_symndx = ELF64_R_SYM (rel->r_info);
7726 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7727 r_symndx, ibfd))
7728 goto error_ret;
7729
7730 if (sym_sec != toc || h != NULL || sym->st_value != 0)
7731 continue;
7732
7733 rel->r_addend -= skip[rel->r_addend >> 3];
7734 }
7735 }
7736
7737 /* We shouldn't have local or global symbols defined in the TOC,
7738 but handle them anyway. */
7739 if (local_syms != NULL)
7740 {
7741 Elf_Internal_Sym *sym;
7742
7743 for (sym = local_syms;
7744 sym < local_syms + symtab_hdr->sh_info;
7745 ++sym)
7746 if (sym->st_value != 0
7747 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
7748 {
7749 if (skip[sym->st_value >> 3] != (unsigned long) -1)
7750 sym->st_value -= skip[sym->st_value >> 3];
7751 else
7752 {
7753 (*_bfd_error_handler)
7754 (_("%s defined in removed toc entry"),
7755 bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7756 NULL));
7757 sym->st_value = 0;
7758 sym->st_shndx = SHN_ABS;
7759 }
7760 symtab_hdr->contents = (unsigned char *) local_syms;
7761 }
7762 }
7763
7764 /* Finally, adjust any global syms defined in the toc. */
7765 if (toc_inf.global_toc_syms)
7766 {
7767 toc_inf.toc = toc;
7768 toc_inf.skip = skip;
7769 toc_inf.global_toc_syms = FALSE;
7770 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
7771 &toc_inf);
7772 }
7773 }
7774
7775 if (local_syms != NULL
7776 && symtab_hdr->contents != (unsigned char *) local_syms)
7777 {
7778 if (!info->keep_memory)
7779 free (local_syms);
7780 else
7781 symtab_hdr->contents = (unsigned char *) local_syms;
7782 }
7783 free (skip);
7784 }
7785
7786 return TRUE;
7787 }
7788
7789 /* Allocate space in .plt, .got and associated reloc sections for
7790 dynamic relocs. */
7791
7792 static bfd_boolean
7793 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7794 {
7795 struct bfd_link_info *info;
7796 struct ppc_link_hash_table *htab;
7797 asection *s;
7798 struct ppc_link_hash_entry *eh;
7799 struct ppc_dyn_relocs *p;
7800 struct got_entry *gent;
7801
7802 if (h->root.type == bfd_link_hash_indirect)
7803 return TRUE;
7804
7805 if (h->root.type == bfd_link_hash_warning)
7806 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7807
7808 info = (struct bfd_link_info *) inf;
7809 htab = ppc_hash_table (info);
7810
7811 if (htab->elf.dynamic_sections_created
7812 && h->dynindx != -1
7813 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
7814 {
7815 struct plt_entry *pent;
7816 bfd_boolean doneone = FALSE;
7817 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
7818 if (pent->plt.refcount > 0)
7819 {
7820 /* If this is the first .plt entry, make room for the special
7821 first entry. */
7822 s = htab->plt;
7823 if (s->size == 0)
7824 s->size += PLT_INITIAL_ENTRY_SIZE;
7825
7826 pent->plt.offset = s->size;
7827
7828 /* Make room for this entry. */
7829 s->size += PLT_ENTRY_SIZE;
7830
7831 /* Make room for the .glink code. */
7832 s = htab->glink;
7833 if (s->size == 0)
7834 s->size += GLINK_CALL_STUB_SIZE;
7835 /* We need bigger stubs past index 32767. */
7836 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
7837 s->size += 4;
7838 s->size += 2*4;
7839
7840 /* We also need to make an entry in the .rela.plt section. */
7841 s = htab->relplt;
7842 s->size += sizeof (Elf64_External_Rela);
7843 doneone = TRUE;
7844 }
7845 else
7846 pent->plt.offset = (bfd_vma) -1;
7847 if (!doneone)
7848 {
7849 h->plt.plist = NULL;
7850 h->needs_plt = 0;
7851 }
7852 }
7853 else
7854 {
7855 h->plt.plist = NULL;
7856 h->needs_plt = 0;
7857 }
7858
7859 eh = (struct ppc_link_hash_entry *) h;
7860 /* Run through the TLS GD got entries first if we're changing them
7861 to TPREL. */
7862 if ((eh->tls_mask & TLS_TPRELGD) != 0)
7863 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7864 if (gent->got.refcount > 0
7865 && (gent->tls_type & TLS_GD) != 0)
7866 {
7867 /* This was a GD entry that has been converted to TPREL. If
7868 there happens to be a TPREL entry we can use that one. */
7869 struct got_entry *ent;
7870 for (ent = h->got.glist; ent != NULL; ent = ent->next)
7871 if (ent->got.refcount > 0
7872 && (ent->tls_type & TLS_TPREL) != 0
7873 && ent->addend == gent->addend
7874 && ent->owner == gent->owner)
7875 {
7876 gent->got.refcount = 0;
7877 break;
7878 }
7879
7880 /* If not, then we'll be using our own TPREL entry. */
7881 if (gent->got.refcount != 0)
7882 gent->tls_type = TLS_TLS | TLS_TPREL;
7883 }
7884
7885 for (gent = h->got.glist; gent != NULL; gent = gent->next)
7886 if (gent->got.refcount > 0)
7887 {
7888 bfd_boolean dyn;
7889
7890 /* Make sure this symbol is output as a dynamic symbol.
7891 Undefined weak syms won't yet be marked as dynamic,
7892 nor will all TLS symbols. */
7893 if (h->dynindx == -1
7894 && !h->forced_local)
7895 {
7896 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7897 return FALSE;
7898 }
7899
7900 if ((gent->tls_type & TLS_LD) != 0
7901 && !h->def_dynamic)
7902 {
7903 ppc64_tlsld_got (gent->owner)->refcount += 1;
7904 gent->got.offset = (bfd_vma) -1;
7905 continue;
7906 }
7907
7908 if (!is_ppc64_elf (gent->owner))
7909 continue;
7910
7911 s = ppc64_elf_tdata (gent->owner)->got;
7912 gent->got.offset = s->size;
7913 s->size
7914 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8;
7915 dyn = htab->elf.dynamic_sections_created;
7916 if ((info->shared
7917 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
7918 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7919 || h->root.type != bfd_link_hash_undefweak))
7920 ppc64_elf_tdata (gent->owner)->relgot->size
7921 += (gent->tls_type & eh->tls_mask & TLS_GD
7922 ? 2 * sizeof (Elf64_External_Rela)
7923 : sizeof (Elf64_External_Rela));
7924 }
7925 else
7926 gent->got.offset = (bfd_vma) -1;
7927
7928 if (eh->dyn_relocs == NULL)
7929 return TRUE;
7930
7931 /* In the shared -Bsymbolic case, discard space allocated for
7932 dynamic pc-relative relocs against symbols which turn out to be
7933 defined in regular objects. For the normal shared case, discard
7934 space for relocs that have become local due to symbol visibility
7935 changes. */
7936
7937 if (info->shared)
7938 {
7939 /* Relocs that use pc_count are those that appear on a call insn,
7940 or certain REL relocs (see must_be_dyn_reloc) that can be
7941 generated via assembly. We want calls to protected symbols to
7942 resolve directly to the function rather than going via the plt.
7943 If people want function pointer comparisons to work as expected
7944 then they should avoid writing weird assembly. */
7945 if (SYMBOL_CALLS_LOCAL (info, h))
7946 {
7947 struct ppc_dyn_relocs **pp;
7948
7949 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
7950 {
7951 p->count -= p->pc_count;
7952 p->pc_count = 0;
7953 if (p->count == 0)
7954 *pp = p->next;
7955 else
7956 pp = &p->next;
7957 }
7958 }
7959
7960 /* Also discard relocs on undefined weak syms with non-default
7961 visibility. */
7962 if (eh->dyn_relocs != NULL
7963 && h->root.type == bfd_link_hash_undefweak)
7964 {
7965 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7966 eh->dyn_relocs = NULL;
7967
7968 /* Make sure this symbol is output as a dynamic symbol.
7969 Undefined weak syms won't yet be marked as dynamic. */
7970 else if (h->dynindx == -1
7971 && !h->forced_local)
7972 {
7973 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7974 return FALSE;
7975 }
7976 }
7977 }
7978 else if (ELIMINATE_COPY_RELOCS)
7979 {
7980 /* For the non-shared case, discard space for relocs against
7981 symbols which turn out to need copy relocs or are not
7982 dynamic. */
7983
7984 if (!h->non_got_ref
7985 && h->def_dynamic
7986 && !h->def_regular)
7987 {
7988 /* Make sure this symbol is output as a dynamic symbol.
7989 Undefined weak syms won't yet be marked as dynamic. */
7990 if (h->dynindx == -1
7991 && !h->forced_local)
7992 {
7993 if (! bfd_elf_link_record_dynamic_symbol (info, h))
7994 return FALSE;
7995 }
7996
7997 /* If that succeeded, we know we'll be keeping all the
7998 relocs. */
7999 if (h->dynindx != -1)
8000 goto keep;
8001 }
8002
8003 eh->dyn_relocs = NULL;
8004
8005 keep: ;
8006 }
8007
8008 /* Finally, allocate space. */
8009 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8010 {
8011 asection *sreloc = elf_section_data (p->sec)->sreloc;
8012 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8013 }
8014
8015 return TRUE;
8016 }
8017
8018 /* Find any dynamic relocs that apply to read-only sections. */
8019
8020 static bfd_boolean
8021 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8022 {
8023 struct ppc_link_hash_entry *eh;
8024 struct ppc_dyn_relocs *p;
8025
8026 if (h->root.type == bfd_link_hash_warning)
8027 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8028
8029 eh = (struct ppc_link_hash_entry *) h;
8030 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8031 {
8032 asection *s = p->sec->output_section;
8033
8034 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8035 {
8036 struct bfd_link_info *info = inf;
8037
8038 info->flags |= DF_TEXTREL;
8039
8040 /* Not an error, just cut short the traversal. */
8041 return FALSE;
8042 }
8043 }
8044 return TRUE;
8045 }
8046
8047 /* Set the sizes of the dynamic sections. */
8048
8049 static bfd_boolean
8050 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8051 struct bfd_link_info *info)
8052 {
8053 struct ppc_link_hash_table *htab;
8054 bfd *dynobj;
8055 asection *s;
8056 bfd_boolean relocs;
8057 bfd *ibfd;
8058
8059 htab = ppc_hash_table (info);
8060 dynobj = htab->elf.dynobj;
8061 if (dynobj == NULL)
8062 abort ();
8063
8064 if (htab->elf.dynamic_sections_created)
8065 {
8066 /* Set the contents of the .interp section to the interpreter. */
8067 if (info->executable)
8068 {
8069 s = bfd_get_section_by_name (dynobj, ".interp");
8070 if (s == NULL)
8071 abort ();
8072 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8073 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8074 }
8075 }
8076
8077 /* Set up .got offsets for local syms, and space for local dynamic
8078 relocs. */
8079 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8080 {
8081 struct got_entry **lgot_ents;
8082 struct got_entry **end_lgot_ents;
8083 char *lgot_masks;
8084 bfd_size_type locsymcount;
8085 Elf_Internal_Shdr *symtab_hdr;
8086 asection *srel;
8087
8088 if (!is_ppc64_elf (ibfd))
8089 continue;
8090
8091 for (s = ibfd->sections; s != NULL; s = s->next)
8092 {
8093 struct ppc_dyn_relocs *p;
8094
8095 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8096 {
8097 if (!bfd_is_abs_section (p->sec)
8098 && bfd_is_abs_section (p->sec->output_section))
8099 {
8100 /* Input section has been discarded, either because
8101 it is a copy of a linkonce section or due to
8102 linker script /DISCARD/, so we'll be discarding
8103 the relocs too. */
8104 }
8105 else if (p->count != 0)
8106 {
8107 srel = elf_section_data (p->sec)->sreloc;
8108 srel->size += p->count * sizeof (Elf64_External_Rela);
8109 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8110 info->flags |= DF_TEXTREL;
8111 }
8112 }
8113 }
8114
8115 lgot_ents = elf_local_got_ents (ibfd);
8116 if (!lgot_ents)
8117 continue;
8118
8119 symtab_hdr = &elf_symtab_hdr (ibfd);
8120 locsymcount = symtab_hdr->sh_info;
8121 end_lgot_ents = lgot_ents + locsymcount;
8122 lgot_masks = (char *) end_lgot_ents;
8123 s = ppc64_elf_tdata (ibfd)->got;
8124 srel = ppc64_elf_tdata (ibfd)->relgot;
8125 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8126 {
8127 struct got_entry *ent;
8128
8129 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
8130 if (ent->got.refcount > 0)
8131 {
8132 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8133 {
8134 ppc64_tlsld_got (ibfd)->refcount += 1;
8135 ent->got.offset = (bfd_vma) -1;
8136 }
8137 else
8138 {
8139 ent->got.offset = s->size;
8140 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8141 {
8142 s->size += 16;
8143 if (info->shared)
8144 srel->size += 2 * sizeof (Elf64_External_Rela);
8145 }
8146 else
8147 {
8148 s->size += 8;
8149 if (info->shared)
8150 srel->size += sizeof (Elf64_External_Rela);
8151 }
8152 }
8153 }
8154 else
8155 ent->got.offset = (bfd_vma) -1;
8156 }
8157 }
8158
8159 /* Allocate global sym .plt and .got entries, and space for global
8160 sym dynamic relocs. */
8161 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8162
8163 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8164 {
8165 if (!is_ppc64_elf (ibfd))
8166 continue;
8167
8168 if (ppc64_tlsld_got (ibfd)->refcount > 0)
8169 {
8170 s = ppc64_elf_tdata (ibfd)->got;
8171 ppc64_tlsld_got (ibfd)->offset = s->size;
8172 s->size += 16;
8173 if (info->shared)
8174 {
8175 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
8176 srel->size += sizeof (Elf64_External_Rela);
8177 }
8178 }
8179 else
8180 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1;
8181 }
8182
8183 /* We now have determined the sizes of the various dynamic sections.
8184 Allocate memory for them. */
8185 relocs = FALSE;
8186 for (s = dynobj->sections; s != NULL; s = s->next)
8187 {
8188 if ((s->flags & SEC_LINKER_CREATED) == 0)
8189 continue;
8190
8191 if (s == htab->brlt || s == htab->relbrlt)
8192 /* These haven't been allocated yet; don't strip. */
8193 continue;
8194 else if (s == htab->got
8195 || s == htab->plt
8196 || s == htab->glink
8197 || s == htab->dynbss)
8198 {
8199 /* Strip this section if we don't need it; see the
8200 comment below. */
8201 }
8202 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8203 {
8204 if (s->size != 0)
8205 {
8206 if (s != htab->relplt)
8207 relocs = TRUE;
8208
8209 /* We use the reloc_count field as a counter if we need
8210 to copy relocs into the output file. */
8211 s->reloc_count = 0;
8212 }
8213 }
8214 else
8215 {
8216 /* It's not one of our sections, so don't allocate space. */
8217 continue;
8218 }
8219
8220 if (s->size == 0)
8221 {
8222 /* If we don't need this section, strip it from the
8223 output file. This is mostly to handle .rela.bss and
8224 .rela.plt. We must create both sections in
8225 create_dynamic_sections, because they must be created
8226 before the linker maps input sections to output
8227 sections. The linker does that before
8228 adjust_dynamic_symbol is called, and it is that
8229 function which decides whether anything needs to go
8230 into these sections. */
8231 s->flags |= SEC_EXCLUDE;
8232 continue;
8233 }
8234
8235 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8236 continue;
8237
8238 /* Allocate memory for the section contents. We use bfd_zalloc
8239 here in case unused entries are not reclaimed before the
8240 section's contents are written out. This should not happen,
8241 but this way if it does we get a R_PPC64_NONE reloc in .rela
8242 sections instead of garbage.
8243 We also rely on the section contents being zero when writing
8244 the GOT. */
8245 s->contents = bfd_zalloc (dynobj, s->size);
8246 if (s->contents == NULL)
8247 return FALSE;
8248 }
8249
8250 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8251 {
8252 if (!is_ppc64_elf (ibfd))
8253 continue;
8254
8255 s = ppc64_elf_tdata (ibfd)->got;
8256 if (s != NULL && s != htab->got)
8257 {
8258 if (s->size == 0)
8259 s->flags |= SEC_EXCLUDE;
8260 else
8261 {
8262 s->contents = bfd_zalloc (ibfd, s->size);
8263 if (s->contents == NULL)
8264 return FALSE;
8265 }
8266 }
8267 s = ppc64_elf_tdata (ibfd)->relgot;
8268 if (s != NULL)
8269 {
8270 if (s->size == 0)
8271 s->flags |= SEC_EXCLUDE;
8272 else
8273 {
8274 s->contents = bfd_zalloc (ibfd, s->size);
8275 if (s->contents == NULL)
8276 return FALSE;
8277 relocs = TRUE;
8278 s->reloc_count = 0;
8279 }
8280 }
8281 }
8282
8283 if (htab->elf.dynamic_sections_created)
8284 {
8285 /* Add some entries to the .dynamic section. We fill in the
8286 values later, in ppc64_elf_finish_dynamic_sections, but we
8287 must add the entries now so that we get the correct size for
8288 the .dynamic section. The DT_DEBUG entry is filled in by the
8289 dynamic linker and used by the debugger. */
8290 #define add_dynamic_entry(TAG, VAL) \
8291 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8292
8293 if (info->executable)
8294 {
8295 if (!add_dynamic_entry (DT_DEBUG, 0))
8296 return FALSE;
8297 }
8298
8299 if (htab->plt != NULL && htab->plt->size != 0)
8300 {
8301 if (!add_dynamic_entry (DT_PLTGOT, 0)
8302 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8303 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8304 || !add_dynamic_entry (DT_JMPREL, 0)
8305 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
8306 return FALSE;
8307 }
8308
8309 if (NO_OPD_RELOCS)
8310 {
8311 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
8312 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
8313 return FALSE;
8314 }
8315
8316 if (relocs)
8317 {
8318 if (!add_dynamic_entry (DT_RELA, 0)
8319 || !add_dynamic_entry (DT_RELASZ, 0)
8320 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
8321 return FALSE;
8322
8323 /* If any dynamic relocs apply to a read-only section,
8324 then we need a DT_TEXTREL entry. */
8325 if ((info->flags & DF_TEXTREL) == 0)
8326 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
8327
8328 if ((info->flags & DF_TEXTREL) != 0)
8329 {
8330 if (!add_dynamic_entry (DT_TEXTREL, 0))
8331 return FALSE;
8332 }
8333 }
8334 }
8335 #undef add_dynamic_entry
8336
8337 return TRUE;
8338 }
8339
8340 /* Determine the type of stub needed, if any, for a call. */
8341
8342 static inline enum ppc_stub_type
8343 ppc_type_of_stub (asection *input_sec,
8344 const Elf_Internal_Rela *rel,
8345 struct ppc_link_hash_entry **hash,
8346 bfd_vma destination)
8347 {
8348 struct ppc_link_hash_entry *h = *hash;
8349 bfd_vma location;
8350 bfd_vma branch_offset;
8351 bfd_vma max_branch_offset;
8352 enum elf_ppc64_reloc_type r_type;
8353
8354 if (h != NULL)
8355 {
8356 struct ppc_link_hash_entry *fdh = h;
8357 if (fdh->oh != NULL
8358 && fdh->oh->is_func_descriptor)
8359 fdh = fdh->oh;
8360
8361 if (fdh->elf.dynindx != -1)
8362 {
8363 struct plt_entry *ent;
8364
8365 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
8366 if (ent->addend == rel->r_addend
8367 && ent->plt.offset != (bfd_vma) -1)
8368 {
8369 *hash = fdh;
8370 return ppc_stub_plt_call;
8371 }
8372 }
8373
8374 /* Here, we know we don't have a plt entry. If we don't have a
8375 either a defined function descriptor or a defined entry symbol
8376 in a regular object file, then it is pointless trying to make
8377 any other type of stub. */
8378 if (!((fdh->elf.root.type == bfd_link_hash_defined
8379 || fdh->elf.root.type == bfd_link_hash_defweak)
8380 && fdh->elf.root.u.def.section->output_section != NULL)
8381 && !((h->elf.root.type == bfd_link_hash_defined
8382 || h->elf.root.type == bfd_link_hash_defweak)
8383 && h->elf.root.u.def.section->output_section != NULL))
8384 return ppc_stub_none;
8385 }
8386
8387 /* Determine where the call point is. */
8388 location = (input_sec->output_offset
8389 + input_sec->output_section->vma
8390 + rel->r_offset);
8391
8392 branch_offset = destination - location;
8393 r_type = ELF64_R_TYPE (rel->r_info);
8394
8395 /* Determine if a long branch stub is needed. */
8396 max_branch_offset = 1 << 25;
8397 if (r_type != R_PPC64_REL24)
8398 max_branch_offset = 1 << 15;
8399
8400 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
8401 /* We need a stub. Figure out whether a long_branch or plt_branch
8402 is needed later. */
8403 return ppc_stub_long_branch;
8404
8405 return ppc_stub_none;
8406 }
8407
8408 /* Build a .plt call stub. */
8409
8410 static inline bfd_byte *
8411 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
8412 {
8413 #define PPC_LO(v) ((v) & 0xffff)
8414 #define PPC_HI(v) (((v) >> 16) & 0xffff)
8415 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
8416
8417 if (PPC_HA (offset) != 0)
8418 {
8419 if (r != NULL)
8420 {
8421 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8422 r[1].r_offset = r[0].r_offset + 8;
8423 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8424 r[1].r_addend = r[0].r_addend;
8425 if (PPC_HA (offset + 16) != PPC_HA (offset))
8426 {
8427 r[2].r_offset = r[1].r_offset + 4;
8428 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
8429 r[2].r_addend = r[0].r_addend;
8430 }
8431 else
8432 {
8433 r[2].r_offset = r[1].r_offset + 8;
8434 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8435 r[2].r_addend = r[0].r_addend + 8;
8436 r[3].r_offset = r[2].r_offset + 4;
8437 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8438 r[3].r_addend = r[0].r_addend + 16;
8439 }
8440 }
8441 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
8442 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8443 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
8444 if (PPC_HA (offset + 16) != PPC_HA (offset))
8445 {
8446 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
8447 offset = 0;
8448 }
8449 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8450 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
8451 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
8452 bfd_put_32 (obfd, BCTR, p), p += 4;
8453 }
8454 else
8455 {
8456 if (r != NULL)
8457 {
8458 r[0].r_offset += 4;
8459 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8460 if (PPC_HA (offset + 16) != PPC_HA (offset))
8461 {
8462 r[1].r_offset = r[0].r_offset + 4;
8463 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
8464 r[1].r_addend = r[0].r_addend;
8465 }
8466 else
8467 {
8468 r[1].r_offset = r[0].r_offset + 8;
8469 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8470 r[1].r_addend = r[0].r_addend + 16;
8471 r[2].r_offset = r[1].r_offset + 4;
8472 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8473 r[2].r_addend = r[0].r_addend + 8;
8474 }
8475 }
8476 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
8477 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
8478 if (PPC_HA (offset + 16) != PPC_HA (offset))
8479 {
8480 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
8481 offset = 0;
8482 }
8483 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
8484 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
8485 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
8486 bfd_put_32 (obfd, BCTR, p), p += 4;
8487 }
8488 return p;
8489 }
8490
8491 static Elf_Internal_Rela *
8492 get_relocs (asection *sec, int count)
8493 {
8494 Elf_Internal_Rela *relocs;
8495 struct bfd_elf_section_data *elfsec_data;
8496
8497 elfsec_data = elf_section_data (sec);
8498 relocs = elfsec_data->relocs;
8499 if (relocs == NULL)
8500 {
8501 bfd_size_type relsize;
8502 relsize = sec->reloc_count * sizeof (*relocs);
8503 relocs = bfd_alloc (sec->owner, relsize);
8504 if (relocs == NULL)
8505 return NULL;
8506 elfsec_data->relocs = relocs;
8507 elfsec_data->rel_hdr.sh_size = (sec->reloc_count
8508 * sizeof (Elf64_External_Rela));
8509 elfsec_data->rel_hdr.sh_entsize = sizeof (Elf64_External_Rela);
8510 sec->reloc_count = 0;
8511 }
8512 relocs += sec->reloc_count;
8513 sec->reloc_count += count;
8514 return relocs;
8515 }
8516
8517 static bfd_boolean
8518 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8519 {
8520 struct ppc_stub_hash_entry *stub_entry;
8521 struct ppc_branch_hash_entry *br_entry;
8522 struct bfd_link_info *info;
8523 struct ppc_link_hash_table *htab;
8524 bfd_byte *loc;
8525 bfd_byte *p;
8526 struct plt_entry *ent;
8527 bfd_vma dest, off;
8528 int size;
8529 Elf_Internal_Rela *r;
8530
8531 /* Massage our args to the form they really have. */
8532 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8533 info = in_arg;
8534
8535 htab = ppc_hash_table (info);
8536
8537 /* Make a note of the offset within the stubs for this entry. */
8538 stub_entry->stub_offset = stub_entry->stub_sec->size;
8539 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
8540
8541 htab->stub_count[stub_entry->stub_type - 1] += 1;
8542 switch (stub_entry->stub_type)
8543 {
8544 case ppc_stub_long_branch:
8545 case ppc_stub_long_branch_r2off:
8546 /* Branches are relative. This is where we are going to. */
8547 off = dest = (stub_entry->target_value
8548 + stub_entry->target_section->output_offset
8549 + stub_entry->target_section->output_section->vma);
8550
8551 /* And this is where we are coming from. */
8552 off -= (stub_entry->stub_offset
8553 + stub_entry->stub_sec->output_offset
8554 + stub_entry->stub_sec->output_section->vma);
8555
8556 size = 4;
8557 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8558 {
8559 bfd_vma r2off;
8560
8561 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8562 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8563 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8564 loc += 4;
8565 size = 12;
8566 if (PPC_HA (r2off) != 0)
8567 {
8568 size = 16;
8569 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8570 loc += 4;
8571 }
8572 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8573 loc += 4;
8574 off -= size - 4;
8575 }
8576 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
8577
8578 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8579 {
8580 (*_bfd_error_handler) (_("long branch stub `%s' offset overflow"),
8581 stub_entry->root.string);
8582 htab->stub_error = TRUE;
8583 return FALSE;
8584 }
8585
8586 if (info->emitrelocations)
8587 {
8588 r = get_relocs (stub_entry->stub_sec, 1);
8589 if (r == NULL)
8590 return FALSE;
8591 r->r_offset = loc - stub_entry->stub_sec->contents;
8592 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
8593 r->r_addend = dest;
8594 if (stub_entry->h != NULL)
8595 {
8596 struct elf_link_hash_entry **hashes;
8597 unsigned long symndx;
8598 struct ppc_link_hash_entry *h;
8599
8600 hashes = elf_sym_hashes (htab->stub_bfd);
8601 if (hashes == NULL)
8602 {
8603 bfd_size_type hsize;
8604
8605 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
8606 hashes = bfd_zalloc (htab->stub_bfd, hsize);
8607 if (hashes == NULL)
8608 return FALSE;
8609 elf_sym_hashes (htab->stub_bfd) = hashes;
8610 htab->stub_globals = 1;
8611 }
8612 symndx = htab->stub_globals++;
8613 h = stub_entry->h;
8614 hashes[symndx] = &h->elf;
8615 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
8616 if (h->oh != NULL && h->oh->is_func)
8617 h = h->oh;
8618 if (h->elf.root.u.def.section != stub_entry->target_section)
8619 /* H is an opd symbol. The addend must be zero. */
8620 r->r_addend = 0;
8621 else
8622 {
8623 off = (h->elf.root.u.def.value
8624 + h->elf.root.u.def.section->output_offset
8625 + h->elf.root.u.def.section->output_section->vma);
8626 r->r_addend -= off;
8627 }
8628 }
8629 }
8630 break;
8631
8632 case ppc_stub_plt_branch:
8633 case ppc_stub_plt_branch_r2off:
8634 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8635 stub_entry->root.string + 9,
8636 FALSE, FALSE);
8637 if (br_entry == NULL)
8638 {
8639 (*_bfd_error_handler) (_("can't find branch stub `%s'"),
8640 stub_entry->root.string);
8641 htab->stub_error = TRUE;
8642 return FALSE;
8643 }
8644
8645 dest = (stub_entry->target_value
8646 + stub_entry->target_section->output_offset
8647 + stub_entry->target_section->output_section->vma);
8648
8649 bfd_put_64 (htab->brlt->owner, dest,
8650 htab->brlt->contents + br_entry->offset);
8651
8652 if (br_entry->iter == htab->stub_iteration)
8653 {
8654 br_entry->iter = 0;
8655
8656 if (htab->relbrlt != NULL)
8657 {
8658 /* Create a reloc for the branch lookup table entry. */
8659 Elf_Internal_Rela rela;
8660 bfd_byte *rl;
8661
8662 rela.r_offset = (br_entry->offset
8663 + htab->brlt->output_offset
8664 + htab->brlt->output_section->vma);
8665 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8666 rela.r_addend = dest;
8667
8668 rl = htab->relbrlt->contents;
8669 rl += (htab->relbrlt->reloc_count++
8670 * sizeof (Elf64_External_Rela));
8671 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
8672 }
8673 else if (info->emitrelocations)
8674 {
8675 r = get_relocs (htab->brlt, 1);
8676 if (r == NULL)
8677 return FALSE;
8678 /* brlt, being SEC_LINKER_CREATED does not go through the
8679 normal reloc processing. Symbols and offsets are not
8680 translated from input file to output file form, so
8681 set up the offset per the output file. */
8682 r->r_offset = (br_entry->offset
8683 + htab->brlt->output_offset
8684 + htab->brlt->output_section->vma);
8685 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
8686 r->r_addend = dest;
8687 }
8688 }
8689
8690 dest = (br_entry->offset
8691 + htab->brlt->output_offset
8692 + htab->brlt->output_section->vma);
8693
8694 off = (dest
8695 - elf_gp (htab->brlt->output_section->owner)
8696 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8697
8698 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8699 {
8700 (*_bfd_error_handler)
8701 (_("linkage table error against `%s'"),
8702 stub_entry->root.string);
8703 bfd_set_error (bfd_error_bad_value);
8704 htab->stub_error = TRUE;
8705 return FALSE;
8706 }
8707
8708 if (info->emitrelocations)
8709 {
8710 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
8711 if (r == NULL)
8712 return FALSE;
8713 r[0].r_offset = loc - stub_entry->stub_sec->contents;
8714 if (bfd_big_endian (info->output_bfd))
8715 r[0].r_offset += 2;
8716 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
8717 r[0].r_offset += 4;
8718 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
8719 r[0].r_addend = dest;
8720 if (PPC_HA (off) != 0)
8721 {
8722 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
8723 r[1].r_offset = r[0].r_offset + 4;
8724 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
8725 r[1].r_addend = r[0].r_addend;
8726 }
8727 }
8728
8729 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
8730 {
8731 if (PPC_HA (off) != 0)
8732 {
8733 size = 16;
8734 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
8735 loc += 4;
8736 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
8737 }
8738 else
8739 {
8740 size = 12;
8741 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
8742 }
8743 }
8744 else
8745 {
8746 bfd_vma r2off;
8747
8748 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8749 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8750 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
8751 loc += 4;
8752 size = 20;
8753 if (PPC_HA (off) != 0)
8754 {
8755 size += 4;
8756 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
8757 loc += 4;
8758 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
8759 loc += 4;
8760 }
8761 else
8762 {
8763 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
8764 loc += 4;
8765 }
8766
8767 if (PPC_HA (r2off) != 0)
8768 {
8769 size += 4;
8770 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
8771 loc += 4;
8772 }
8773 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
8774 }
8775 loc += 4;
8776 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
8777 loc += 4;
8778 bfd_put_32 (htab->stub_bfd, BCTR, loc);
8779 break;
8780
8781 case ppc_stub_plt_call:
8782 /* Do the best we can for shared libraries built without
8783 exporting ".foo" for each "foo". This can happen when symbol
8784 versioning scripts strip all bar a subset of symbols. */
8785 if (stub_entry->h->oh != NULL
8786 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defined
8787 && stub_entry->h->oh->elf.root.type != bfd_link_hash_defweak)
8788 {
8789 /* Point the symbol at the stub. There may be multiple stubs,
8790 we don't really care; The main thing is to make this sym
8791 defined somewhere. Maybe defining the symbol in the stub
8792 section is a silly idea. If we didn't do this, htab->top_id
8793 could disappear. */
8794 stub_entry->h->oh->elf.root.type = bfd_link_hash_defined;
8795 stub_entry->h->oh->elf.root.u.def.section = stub_entry->stub_sec;
8796 stub_entry->h->oh->elf.root.u.def.value = stub_entry->stub_offset;
8797 }
8798
8799 /* Now build the stub. */
8800 dest = (bfd_vma) -1;
8801 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8802 if (ent->addend == stub_entry->addend)
8803 {
8804 dest = ent->plt.offset;
8805 break;
8806 }
8807 if (dest >= (bfd_vma) -2)
8808 abort ();
8809
8810 dest &= ~ (bfd_vma) 1;
8811 dest += (htab->plt->output_offset
8812 + htab->plt->output_section->vma);
8813
8814 off = (dest
8815 - elf_gp (htab->plt->output_section->owner)
8816 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8817
8818 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
8819 {
8820 (*_bfd_error_handler)
8821 (_("linkage table error against `%s'"),
8822 stub_entry->h->elf.root.root.string);
8823 bfd_set_error (bfd_error_bad_value);
8824 htab->stub_error = TRUE;
8825 return FALSE;
8826 }
8827
8828 r = NULL;
8829 if (info->emitrelocations)
8830 {
8831 r = get_relocs (stub_entry->stub_sec,
8832 (2 + (PPC_HA (off) != 0)
8833 + (PPC_HA (off + 16) == PPC_HA (off))));
8834 if (r == NULL)
8835 return FALSE;
8836 r[0].r_offset = loc - stub_entry->stub_sec->contents;
8837 if (bfd_big_endian (info->output_bfd))
8838 r[0].r_offset += 2;
8839 r[0].r_addend = dest;
8840 }
8841 p = build_plt_stub (htab->stub_bfd, loc, off, r);
8842 size = p - loc;
8843 break;
8844
8845 default:
8846 BFD_FAIL ();
8847 return FALSE;
8848 }
8849
8850 stub_entry->stub_sec->size += size;
8851
8852 if (htab->emit_stub_syms)
8853 {
8854 struct elf_link_hash_entry *h;
8855 size_t len1, len2;
8856 char *name;
8857 const char *const stub_str[] = { "long_branch",
8858 "long_branch_r2off",
8859 "plt_branch",
8860 "plt_branch_r2off",
8861 "plt_call" };
8862
8863 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
8864 len2 = strlen (stub_entry->root.string);
8865 name = bfd_malloc (len1 + len2 + 2);
8866 if (name == NULL)
8867 return FALSE;
8868 memcpy (name, stub_entry->root.string, 9);
8869 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
8870 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
8871 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
8872 if (h == NULL)
8873 return FALSE;
8874 if (h->root.type == bfd_link_hash_new)
8875 {
8876 h->root.type = bfd_link_hash_defined;
8877 h->root.u.def.section = stub_entry->stub_sec;
8878 h->root.u.def.value = stub_entry->stub_offset;
8879 h->ref_regular = 1;
8880 h->def_regular = 1;
8881 h->ref_regular_nonweak = 1;
8882 h->forced_local = 1;
8883 h->non_elf = 0;
8884 }
8885 }
8886
8887 return TRUE;
8888 }
8889
8890 /* As above, but don't actually build the stub. Just bump offset so
8891 we know stub section sizes, and select plt_branch stubs where
8892 long_branch stubs won't do. */
8893
8894 static bfd_boolean
8895 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8896 {
8897 struct ppc_stub_hash_entry *stub_entry;
8898 struct bfd_link_info *info;
8899 struct ppc_link_hash_table *htab;
8900 bfd_vma off;
8901 int size;
8902
8903 /* Massage our args to the form they really have. */
8904 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
8905 info = in_arg;
8906
8907 htab = ppc_hash_table (info);
8908
8909 if (stub_entry->stub_type == ppc_stub_plt_call)
8910 {
8911 struct plt_entry *ent;
8912 off = (bfd_vma) -1;
8913 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next)
8914 if (ent->addend == stub_entry->addend)
8915 {
8916 off = ent->plt.offset & ~(bfd_vma) 1;
8917 break;
8918 }
8919 if (off >= (bfd_vma) -2)
8920 abort ();
8921 off += (htab->plt->output_offset
8922 + htab->plt->output_section->vma
8923 - elf_gp (htab->plt->output_section->owner)
8924 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8925
8926 size = PLT_CALL_STUB_SIZE;
8927 if (PPC_HA (off) == 0)
8928 size -= 4;
8929 if (PPC_HA (off + 16) != PPC_HA (off))
8930 size += 4;
8931 if (info->emitrelocations)
8932 {
8933 stub_entry->stub_sec->reloc_count
8934 += 2 + (PPC_HA (off) != 0) + (PPC_HA (off + 16) == PPC_HA (off));
8935 stub_entry->stub_sec->flags |= SEC_RELOC;
8936 }
8937 }
8938 else
8939 {
8940 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
8941 variants. */
8942 bfd_vma r2off = 0;
8943
8944 off = (stub_entry->target_value
8945 + stub_entry->target_section->output_offset
8946 + stub_entry->target_section->output_section->vma);
8947 off -= (stub_entry->stub_sec->size
8948 + stub_entry->stub_sec->output_offset
8949 + stub_entry->stub_sec->output_section->vma);
8950
8951 /* Reset the stub type from the plt variant in case we now
8952 can reach with a shorter stub. */
8953 if (stub_entry->stub_type >= ppc_stub_plt_branch)
8954 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
8955
8956 size = 4;
8957 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
8958 {
8959 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off
8960 - htab->stub_group[stub_entry->id_sec->id].toc_off);
8961 size = 12;
8962 if (PPC_HA (r2off) != 0)
8963 size = 16;
8964 off -= size - 4;
8965 }
8966
8967 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
8968 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
8969 {
8970 struct ppc_branch_hash_entry *br_entry;
8971
8972 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
8973 stub_entry->root.string + 9,
8974 TRUE, FALSE);
8975 if (br_entry == NULL)
8976 {
8977 (*_bfd_error_handler) (_("can't build branch stub `%s'"),
8978 stub_entry->root.string);
8979 htab->stub_error = TRUE;
8980 return FALSE;
8981 }
8982
8983 if (br_entry->iter != htab->stub_iteration)
8984 {
8985 br_entry->iter = htab->stub_iteration;
8986 br_entry->offset = htab->brlt->size;
8987 htab->brlt->size += 8;
8988
8989 if (htab->relbrlt != NULL)
8990 htab->relbrlt->size += sizeof (Elf64_External_Rela);
8991 else if (info->emitrelocations)
8992 {
8993 htab->brlt->reloc_count += 1;
8994 htab->brlt->flags |= SEC_RELOC;
8995 }
8996 }
8997
8998 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
8999 off = (br_entry->offset
9000 + htab->brlt->output_offset
9001 + htab->brlt->output_section->vma
9002 - elf_gp (htab->brlt->output_section->owner)
9003 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9004
9005 if (info->emitrelocations)
9006 {
9007 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
9008 stub_entry->stub_sec->flags |= SEC_RELOC;
9009 }
9010
9011 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9012 {
9013 size = 12;
9014 if (PPC_HA (off) != 0)
9015 size = 16;
9016 }
9017 else
9018 {
9019 size = 20;
9020 if (PPC_HA (off) != 0)
9021 size += 4;
9022
9023 if (PPC_HA (r2off) != 0)
9024 size += 4;
9025 }
9026 }
9027 else if (info->emitrelocations)
9028 {
9029 stub_entry->stub_sec->reloc_count += 1;
9030 stub_entry->stub_sec->flags |= SEC_RELOC;
9031 }
9032 }
9033
9034 stub_entry->stub_sec->size += size;
9035 return TRUE;
9036 }
9037
9038 /* Set up various things so that we can make a list of input sections
9039 for each output section included in the link. Returns -1 on error,
9040 0 when no stubs will be needed, and 1 on success. */
9041
9042 int
9043 ppc64_elf_setup_section_lists (bfd *output_bfd,
9044 struct bfd_link_info *info,
9045 int no_multi_toc)
9046 {
9047 bfd *input_bfd;
9048 int top_id, top_index, id;
9049 asection *section;
9050 asection **input_list;
9051 bfd_size_type amt;
9052 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9053
9054 htab->no_multi_toc = no_multi_toc;
9055
9056 if (htab->brlt == NULL)
9057 return 0;
9058
9059 /* Find the top input section id. */
9060 for (input_bfd = info->input_bfds, top_id = 3;
9061 input_bfd != NULL;
9062 input_bfd = input_bfd->link_next)
9063 {
9064 for (section = input_bfd->sections;
9065 section != NULL;
9066 section = section->next)
9067 {
9068 if (top_id < section->id)
9069 top_id = section->id;
9070 }
9071 }
9072
9073 htab->top_id = top_id;
9074 amt = sizeof (struct map_stub) * (top_id + 1);
9075 htab->stub_group = bfd_zmalloc (amt);
9076 if (htab->stub_group == NULL)
9077 return -1;
9078
9079 /* Set toc_off for com, und, abs and ind sections. */
9080 for (id = 0; id < 3; id++)
9081 htab->stub_group[id].toc_off = TOC_BASE_OFF;
9082
9083 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd);
9084
9085 /* We can't use output_bfd->section_count here to find the top output
9086 section index as some sections may have been removed, and
9087 strip_excluded_output_sections doesn't renumber the indices. */
9088 for (section = output_bfd->sections, top_index = 0;
9089 section != NULL;
9090 section = section->next)
9091 {
9092 if (top_index < section->index)
9093 top_index = section->index;
9094 }
9095
9096 htab->top_index = top_index;
9097 amt = sizeof (asection *) * (top_index + 1);
9098 input_list = bfd_zmalloc (amt);
9099 htab->input_list = input_list;
9100 if (input_list == NULL)
9101 return -1;
9102
9103 return 1;
9104 }
9105
9106 /* The linker repeatedly calls this function for each TOC input section
9107 and linker generated GOT section. Group input bfds such that the toc
9108 within a group is less than 64k in size. Will break with cute linker
9109 scripts that play games with dot in the output toc section. */
9110
9111 void
9112 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
9113 {
9114 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9115
9116 if (!htab->no_multi_toc)
9117 {
9118 bfd_vma addr = isec->output_offset + isec->output_section->vma;
9119 bfd_vma off = addr - htab->toc_curr;
9120
9121 if (off + isec->size > 0x10000)
9122 htab->toc_curr = addr;
9123
9124 elf_gp (isec->owner) = (htab->toc_curr
9125 - elf_gp (isec->output_section->owner)
9126 + TOC_BASE_OFF);
9127 }
9128 }
9129
9130 /* Called after the last call to the above function. */
9131
9132 void
9133 ppc64_elf_reinit_toc (bfd *output_bfd, struct bfd_link_info *info)
9134 {
9135 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9136
9137 htab->multi_toc_needed = htab->toc_curr != elf_gp (output_bfd);
9138
9139 /* toc_curr tracks the TOC offset used for code sections below in
9140 ppc64_elf_next_input_section. Start off at 0x8000. */
9141 htab->toc_curr = TOC_BASE_OFF;
9142 }
9143
9144 /* No toc references were found in ISEC. If the code in ISEC makes no
9145 calls, then there's no need to use toc adjusting stubs when branching
9146 into ISEC. Actually, indirect calls from ISEC are OK as they will
9147 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
9148 needed, and 2 if a cyclical call-graph was found but no other reason
9149 for a stub was detected. If called from the top level, a return of
9150 2 means the same as a return of 0. */
9151
9152 static int
9153 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
9154 {
9155 Elf_Internal_Rela *relstart, *rel;
9156 Elf_Internal_Sym *local_syms;
9157 int ret;
9158 struct ppc_link_hash_table *htab;
9159
9160 /* We know none of our code bearing sections will need toc stubs. */
9161 if ((isec->flags & SEC_LINKER_CREATED) != 0)
9162 return 0;
9163
9164 if (isec->size == 0)
9165 return 0;
9166
9167 if (isec->output_section == NULL)
9168 return 0;
9169
9170 if (isec->reloc_count == 0)
9171 return 0;
9172
9173 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
9174 info->keep_memory);
9175 if (relstart == NULL)
9176 return -1;
9177
9178 /* Look for branches to outside of this section. */
9179 local_syms = NULL;
9180 ret = 0;
9181 htab = ppc_hash_table (info);
9182 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
9183 {
9184 enum elf_ppc64_reloc_type r_type;
9185 unsigned long r_symndx;
9186 struct elf_link_hash_entry *h;
9187 Elf_Internal_Sym *sym;
9188 asection *sym_sec;
9189 struct _opd_sec_data *opd;
9190 bfd_vma sym_value;
9191 bfd_vma dest;
9192
9193 r_type = ELF64_R_TYPE (rel->r_info);
9194 if (r_type != R_PPC64_REL24
9195 && r_type != R_PPC64_REL14
9196 && r_type != R_PPC64_REL14_BRTAKEN
9197 && r_type != R_PPC64_REL14_BRNTAKEN)
9198 continue;
9199
9200 r_symndx = ELF64_R_SYM (rel->r_info);
9201 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
9202 isec->owner))
9203 {
9204 ret = -1;
9205 break;
9206 }
9207
9208 /* Calls to dynamic lib functions go through a plt call stub
9209 that uses r2. Branches to undefined symbols might be a call
9210 using old-style dot symbols that can be satisfied by a plt
9211 call into a new-style dynamic library. */
9212 if (sym_sec == NULL)
9213 {
9214 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
9215 if (eh != NULL
9216 && eh->oh != NULL
9217 && eh->oh->elf.plt.plist != NULL)
9218 {
9219 ret = 1;
9220 break;
9221 }
9222
9223 /* Ignore other undefined symbols. */
9224 continue;
9225 }
9226
9227 /* Assume branches to other sections not included in the link need
9228 stubs too, to cover -R and absolute syms. */
9229 if (sym_sec->output_section == NULL)
9230 {
9231 ret = 1;
9232 break;
9233 }
9234
9235 if (h == NULL)
9236 sym_value = sym->st_value;
9237 else
9238 {
9239 if (h->root.type != bfd_link_hash_defined
9240 && h->root.type != bfd_link_hash_defweak)
9241 abort ();
9242 sym_value = h->root.u.def.value;
9243 }
9244 sym_value += rel->r_addend;
9245
9246 /* If this branch reloc uses an opd sym, find the code section. */
9247 opd = get_opd_info (sym_sec);
9248 if (opd != NULL)
9249 {
9250 if (h == NULL && opd->adjust != NULL)
9251 {
9252 long adjust;
9253
9254 adjust = opd->adjust[sym->st_value / 8];
9255 if (adjust == -1)
9256 /* Assume deleted functions won't ever be called. */
9257 continue;
9258 sym_value += adjust;
9259 }
9260
9261 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
9262 if (dest == (bfd_vma) -1)
9263 continue;
9264 }
9265 else
9266 dest = (sym_value
9267 + sym_sec->output_offset
9268 + sym_sec->output_section->vma);
9269
9270 /* Ignore branch to self. */
9271 if (sym_sec == isec)
9272 continue;
9273
9274 /* If the called function uses the toc, we need a stub. */
9275 if (sym_sec->has_toc_reloc
9276 || sym_sec->makes_toc_func_call)
9277 {
9278 ret = 1;
9279 break;
9280 }
9281
9282 /* Assume any branch that needs a long branch stub might in fact
9283 need a plt_branch stub. A plt_branch stub uses r2. */
9284 else if (dest - (isec->output_offset
9285 + isec->output_section->vma
9286 + rel->r_offset) + (1 << 25) >= (2 << 25))
9287 {
9288 ret = 1;
9289 break;
9290 }
9291
9292 /* If calling back to a section in the process of being tested, we
9293 can't say for sure that no toc adjusting stubs are needed, so
9294 don't return zero. */
9295 else if (sym_sec->call_check_in_progress)
9296 ret = 2;
9297
9298 /* Branches to another section that itself doesn't have any TOC
9299 references are OK. Recursively call ourselves to check. */
9300 else if (sym_sec->id <= htab->top_id
9301 && htab->stub_group[sym_sec->id].toc_off == 0)
9302 {
9303 int recur;
9304
9305 /* Mark current section as indeterminate, so that other
9306 sections that call back to current won't be marked as
9307 known. */
9308 isec->call_check_in_progress = 1;
9309 recur = toc_adjusting_stub_needed (info, sym_sec);
9310 isec->call_check_in_progress = 0;
9311
9312 if (recur < 0)
9313 {
9314 /* An error. Exit. */
9315 ret = -1;
9316 break;
9317 }
9318 else if (recur <= 1)
9319 {
9320 /* Known result. Mark as checked and set section flag. */
9321 htab->stub_group[sym_sec->id].toc_off = 1;
9322 if (recur != 0)
9323 {
9324 sym_sec->makes_toc_func_call = 1;
9325 ret = 1;
9326 break;
9327 }
9328 }
9329 else
9330 {
9331 /* Unknown result. Continue checking. */
9332 ret = 2;
9333 }
9334 }
9335 }
9336
9337 if (local_syms != NULL
9338 && (elf_symtab_hdr (isec->owner).contents != (unsigned char *) local_syms))
9339 free (local_syms);
9340 if (elf_section_data (isec)->relocs != relstart)
9341 free (relstart);
9342
9343 return ret;
9344 }
9345
9346 /* The linker repeatedly calls this function for each input section,
9347 in the order that input sections are linked into output sections.
9348 Build lists of input sections to determine groupings between which
9349 we may insert linker stubs. */
9350
9351 bfd_boolean
9352 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
9353 {
9354 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9355
9356 if ((isec->output_section->flags & SEC_CODE) != 0
9357 && isec->output_section->index <= htab->top_index)
9358 {
9359 asection **list = htab->input_list + isec->output_section->index;
9360 /* Steal the link_sec pointer for our list. */
9361 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
9362 /* This happens to make the list in reverse order,
9363 which is what we want. */
9364 PREV_SEC (isec) = *list;
9365 *list = isec;
9366 }
9367
9368 if (htab->multi_toc_needed)
9369 {
9370 /* If a code section has a function that uses the TOC then we need
9371 to use the right TOC (obviously). Also, make sure that .opd gets
9372 the correct TOC value for R_PPC64_TOC relocs that don't have or
9373 can't find their function symbol (shouldn't ever happen now).
9374 Also specially treat .fixup for the linux kernel. .fixup
9375 contains branches, but only back to the function that hit an
9376 exception. */
9377 if (isec->has_toc_reloc
9378 || (isec->flags & SEC_CODE) == 0
9379 || strcmp (isec->name, ".fixup") == 0)
9380 {
9381 if (elf_gp (isec->owner) != 0)
9382 htab->toc_curr = elf_gp (isec->owner);
9383 }
9384 else if (htab->stub_group[isec->id].toc_off == 0)
9385 {
9386 int ret = toc_adjusting_stub_needed (info, isec);
9387 if (ret < 0)
9388 return FALSE;
9389 else
9390 isec->makes_toc_func_call = ret & 1;
9391 }
9392 }
9393
9394 /* Functions that don't use the TOC can belong in any TOC group.
9395 Use the last TOC base. This happens to make _init and _fini
9396 pasting work. */
9397 htab->stub_group[isec->id].toc_off = htab->toc_curr;
9398 return TRUE;
9399 }
9400
9401 /* See whether we can group stub sections together. Grouping stub
9402 sections may result in fewer stubs. More importantly, we need to
9403 put all .init* and .fini* stubs at the beginning of the .init or
9404 .fini output sections respectively, because glibc splits the
9405 _init and _fini functions into multiple parts. Putting a stub in
9406 the middle of a function is not a good idea. */
9407
9408 static void
9409 group_sections (struct ppc_link_hash_table *htab,
9410 bfd_size_type stub_group_size,
9411 bfd_boolean stubs_always_before_branch)
9412 {
9413 asection **list;
9414 bfd_size_type stub14_group_size;
9415 bfd_boolean suppress_size_errors;
9416
9417 suppress_size_errors = FALSE;
9418 stub14_group_size = stub_group_size;
9419 if (stub_group_size == 1)
9420 {
9421 /* Default values. */
9422 if (stubs_always_before_branch)
9423 {
9424 stub_group_size = 0x1e00000;
9425 stub14_group_size = 0x7800;
9426 }
9427 else
9428 {
9429 stub_group_size = 0x1c00000;
9430 stub14_group_size = 0x7000;
9431 }
9432 suppress_size_errors = TRUE;
9433 }
9434
9435 list = htab->input_list + htab->top_index;
9436 do
9437 {
9438 asection *tail = *list;
9439 while (tail != NULL)
9440 {
9441 asection *curr;
9442 asection *prev;
9443 bfd_size_type total;
9444 bfd_boolean big_sec;
9445 bfd_vma curr_toc;
9446
9447 curr = tail;
9448 total = tail->size;
9449 big_sec = total > (ppc64_elf_section_data (tail)->has_14bit_branch
9450 ? stub14_group_size : stub_group_size);
9451 if (big_sec && !suppress_size_errors)
9452 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
9453 tail->owner, tail);
9454 curr_toc = htab->stub_group[tail->id].toc_off;
9455
9456 while ((prev = PREV_SEC (curr)) != NULL
9457 && ((total += curr->output_offset - prev->output_offset)
9458 < (ppc64_elf_section_data (prev)->has_14bit_branch
9459 ? stub14_group_size : stub_group_size))
9460 && htab->stub_group[prev->id].toc_off == curr_toc)
9461 curr = prev;
9462
9463 /* OK, the size from the start of CURR to the end is less
9464 than stub_group_size and thus can be handled by one stub
9465 section. (or the tail section is itself larger than
9466 stub_group_size, in which case we may be toast.) We
9467 should really be keeping track of the total size of stubs
9468 added here, as stubs contribute to the final output
9469 section size. That's a little tricky, and this way will
9470 only break if stubs added make the total size more than
9471 2^25, ie. for the default stub_group_size, if stubs total
9472 more than 2097152 bytes, or nearly 75000 plt call stubs. */
9473 do
9474 {
9475 prev = PREV_SEC (tail);
9476 /* Set up this stub group. */
9477 htab->stub_group[tail->id].link_sec = curr;
9478 }
9479 while (tail != curr && (tail = prev) != NULL);
9480
9481 /* But wait, there's more! Input sections up to stub_group_size
9482 bytes before the stub section can be handled by it too.
9483 Don't do this if we have a really large section after the
9484 stubs, as adding more stubs increases the chance that
9485 branches may not reach into the stub section. */
9486 if (!stubs_always_before_branch && !big_sec)
9487 {
9488 total = 0;
9489 while (prev != NULL
9490 && ((total += tail->output_offset - prev->output_offset)
9491 < (ppc64_elf_section_data (prev)->has_14bit_branch
9492 ? stub14_group_size : stub_group_size))
9493 && htab->stub_group[prev->id].toc_off == curr_toc)
9494 {
9495 tail = prev;
9496 prev = PREV_SEC (tail);
9497 htab->stub_group[tail->id].link_sec = curr;
9498 }
9499 }
9500 tail = prev;
9501 }
9502 }
9503 while (list-- != htab->input_list);
9504 free (htab->input_list);
9505 #undef PREV_SEC
9506 }
9507
9508 /* Determine and set the size of the stub section for a final link.
9509
9510 The basic idea here is to examine all the relocations looking for
9511 PC-relative calls to a target that is unreachable with a "bl"
9512 instruction. */
9513
9514 bfd_boolean
9515 ppc64_elf_size_stubs (bfd *output_bfd,
9516 struct bfd_link_info *info,
9517 bfd_signed_vma group_size,
9518 asection *(*add_stub_section) (const char *, asection *),
9519 void (*layout_sections_again) (void))
9520 {
9521 bfd_size_type stub_group_size;
9522 bfd_boolean stubs_always_before_branch;
9523 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9524
9525 /* Stash our params away. */
9526 htab->add_stub_section = add_stub_section;
9527 htab->layout_sections_again = layout_sections_again;
9528 stubs_always_before_branch = group_size < 0;
9529 if (group_size < 0)
9530 stub_group_size = -group_size;
9531 else
9532 stub_group_size = group_size;
9533
9534 group_sections (htab, stub_group_size, stubs_always_before_branch);
9535
9536 while (1)
9537 {
9538 bfd *input_bfd;
9539 unsigned int bfd_indx;
9540 asection *stub_sec;
9541
9542 htab->stub_iteration += 1;
9543
9544 for (input_bfd = info->input_bfds, bfd_indx = 0;
9545 input_bfd != NULL;
9546 input_bfd = input_bfd->link_next, bfd_indx++)
9547 {
9548 Elf_Internal_Shdr *symtab_hdr;
9549 asection *section;
9550 Elf_Internal_Sym *local_syms = NULL;
9551
9552 if (!is_ppc64_elf (input_bfd))
9553 continue;
9554
9555 /* We'll need the symbol table in a second. */
9556 symtab_hdr = &elf_symtab_hdr (input_bfd);
9557 if (symtab_hdr->sh_info == 0)
9558 continue;
9559
9560 /* Walk over each section attached to the input bfd. */
9561 for (section = input_bfd->sections;
9562 section != NULL;
9563 section = section->next)
9564 {
9565 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
9566
9567 /* If there aren't any relocs, then there's nothing more
9568 to do. */
9569 if ((section->flags & SEC_RELOC) == 0
9570 || (section->flags & SEC_ALLOC) == 0
9571 || (section->flags & SEC_LOAD) == 0
9572 || (section->flags & SEC_CODE) == 0
9573 || section->reloc_count == 0)
9574 continue;
9575
9576 /* If this section is a link-once section that will be
9577 discarded, then don't create any stubs. */
9578 if (section->output_section == NULL
9579 || section->output_section->owner != output_bfd)
9580 continue;
9581
9582 /* Get the relocs. */
9583 internal_relocs
9584 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
9585 info->keep_memory);
9586 if (internal_relocs == NULL)
9587 goto error_ret_free_local;
9588
9589 /* Now examine each relocation. */
9590 irela = internal_relocs;
9591 irelaend = irela + section->reloc_count;
9592 for (; irela < irelaend; irela++)
9593 {
9594 enum elf_ppc64_reloc_type r_type;
9595 unsigned int r_indx;
9596 enum ppc_stub_type stub_type;
9597 struct ppc_stub_hash_entry *stub_entry;
9598 asection *sym_sec, *code_sec;
9599 bfd_vma sym_value;
9600 bfd_vma destination;
9601 bfd_boolean ok_dest;
9602 struct ppc_link_hash_entry *hash;
9603 struct ppc_link_hash_entry *fdh;
9604 struct elf_link_hash_entry *h;
9605 Elf_Internal_Sym *sym;
9606 char *stub_name;
9607 const asection *id_sec;
9608 struct _opd_sec_data *opd;
9609
9610 r_type = ELF64_R_TYPE (irela->r_info);
9611 r_indx = ELF64_R_SYM (irela->r_info);
9612
9613 if (r_type >= R_PPC64_max)
9614 {
9615 bfd_set_error (bfd_error_bad_value);
9616 goto error_ret_free_internal;
9617 }
9618
9619 /* Only look for stubs on branch instructions. */
9620 if (r_type != R_PPC64_REL24
9621 && r_type != R_PPC64_REL14
9622 && r_type != R_PPC64_REL14_BRTAKEN
9623 && r_type != R_PPC64_REL14_BRNTAKEN)
9624 continue;
9625
9626 /* Now determine the call target, its name, value,
9627 section. */
9628 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
9629 r_indx, input_bfd))
9630 goto error_ret_free_internal;
9631 hash = (struct ppc_link_hash_entry *) h;
9632
9633 ok_dest = FALSE;
9634 fdh = NULL;
9635 sym_value = 0;
9636 if (hash == NULL)
9637 {
9638 sym_value = sym->st_value;
9639 ok_dest = TRUE;
9640 }
9641 else if (hash->elf.root.type == bfd_link_hash_defined
9642 || hash->elf.root.type == bfd_link_hash_defweak)
9643 {
9644 sym_value = hash->elf.root.u.def.value;
9645 if (sym_sec->output_section != NULL)
9646 ok_dest = TRUE;
9647 }
9648 else if (hash->elf.root.type == bfd_link_hash_undefweak
9649 || hash->elf.root.type == bfd_link_hash_undefined)
9650 {
9651 /* Recognise an old ABI func code entry sym, and
9652 use the func descriptor sym instead if it is
9653 defined. */
9654 if (hash->elf.root.root.string[0] == '.'
9655 && (fdh = get_fdh (hash, htab)) != NULL)
9656 {
9657 if (fdh->elf.root.type == bfd_link_hash_defined
9658 || fdh->elf.root.type == bfd_link_hash_defweak)
9659 {
9660 sym_sec = fdh->elf.root.u.def.section;
9661 sym_value = fdh->elf.root.u.def.value;
9662 if (sym_sec->output_section != NULL)
9663 ok_dest = TRUE;
9664 }
9665 else
9666 fdh = NULL;
9667 }
9668 }
9669 else
9670 {
9671 bfd_set_error (bfd_error_bad_value);
9672 goto error_ret_free_internal;
9673 }
9674
9675 destination = 0;
9676 if (ok_dest)
9677 {
9678 sym_value += irela->r_addend;
9679 destination = (sym_value
9680 + sym_sec->output_offset
9681 + sym_sec->output_section->vma);
9682 }
9683
9684 code_sec = sym_sec;
9685 opd = get_opd_info (sym_sec);
9686 if (opd != NULL)
9687 {
9688 bfd_vma dest;
9689
9690 if (hash == NULL && opd->adjust != NULL)
9691 {
9692 long adjust = opd->adjust[sym_value / 8];
9693 if (adjust == -1)
9694 continue;
9695 sym_value += adjust;
9696 }
9697 dest = opd_entry_value (sym_sec, sym_value,
9698 &code_sec, &sym_value);
9699 if (dest != (bfd_vma) -1)
9700 {
9701 destination = dest;
9702 if (fdh != NULL)
9703 {
9704 /* Fixup old ABI sym to point at code
9705 entry. */
9706 hash->elf.root.type = bfd_link_hash_defweak;
9707 hash->elf.root.u.def.section = code_sec;
9708 hash->elf.root.u.def.value = sym_value;
9709 }
9710 }
9711 }
9712
9713 /* Determine what (if any) linker stub is needed. */
9714 stub_type = ppc_type_of_stub (section, irela, &hash,
9715 destination);
9716
9717 if (stub_type != ppc_stub_plt_call)
9718 {
9719 /* Check whether we need a TOC adjusting stub.
9720 Since the linker pastes together pieces from
9721 different object files when creating the
9722 _init and _fini functions, it may be that a
9723 call to what looks like a local sym is in
9724 fact a call needing a TOC adjustment. */
9725 if (code_sec != NULL
9726 && code_sec->output_section != NULL
9727 && (htab->stub_group[code_sec->id].toc_off
9728 != htab->stub_group[section->id].toc_off)
9729 && (code_sec->has_toc_reloc
9730 || code_sec->makes_toc_func_call))
9731 stub_type = ppc_stub_long_branch_r2off;
9732 }
9733
9734 if (stub_type == ppc_stub_none)
9735 continue;
9736
9737 /* __tls_get_addr calls might be eliminated. */
9738 if (stub_type != ppc_stub_plt_call
9739 && hash != NULL
9740 && (hash == htab->tls_get_addr
9741 || hash == htab->tls_get_addr_fd)
9742 && section->has_tls_reloc
9743 && irela != internal_relocs)
9744 {
9745 /* Get tls info. */
9746 char *tls_mask;
9747
9748 if (!get_tls_mask (&tls_mask, NULL, &local_syms,
9749 irela - 1, input_bfd))
9750 goto error_ret_free_internal;
9751 if (*tls_mask != 0)
9752 continue;
9753 }
9754
9755 /* Support for grouping stub sections. */
9756 id_sec = htab->stub_group[section->id].link_sec;
9757
9758 /* Get the name of this stub. */
9759 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
9760 if (!stub_name)
9761 goto error_ret_free_internal;
9762
9763 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
9764 stub_name, FALSE, FALSE);
9765 if (stub_entry != NULL)
9766 {
9767 /* The proper stub has already been created. */
9768 free (stub_name);
9769 continue;
9770 }
9771
9772 stub_entry = ppc_add_stub (stub_name, section, htab);
9773 if (stub_entry == NULL)
9774 {
9775 free (stub_name);
9776 error_ret_free_internal:
9777 if (elf_section_data (section)->relocs == NULL)
9778 free (internal_relocs);
9779 error_ret_free_local:
9780 if (local_syms != NULL
9781 && (symtab_hdr->contents
9782 != (unsigned char *) local_syms))
9783 free (local_syms);
9784 return FALSE;
9785 }
9786
9787 stub_entry->stub_type = stub_type;
9788 stub_entry->target_value = sym_value;
9789 stub_entry->target_section = code_sec;
9790 stub_entry->h = hash;
9791 stub_entry->addend = irela->r_addend;
9792
9793 if (stub_entry->h != NULL)
9794 htab->stub_globals += 1;
9795 }
9796
9797 /* We're done with the internal relocs, free them. */
9798 if (elf_section_data (section)->relocs != internal_relocs)
9799 free (internal_relocs);
9800 }
9801
9802 if (local_syms != NULL
9803 && symtab_hdr->contents != (unsigned char *) local_syms)
9804 {
9805 if (!info->keep_memory)
9806 free (local_syms);
9807 else
9808 symtab_hdr->contents = (unsigned char *) local_syms;
9809 }
9810 }
9811
9812 /* We may have added some stubs. Find out the new size of the
9813 stub sections. */
9814 for (stub_sec = htab->stub_bfd->sections;
9815 stub_sec != NULL;
9816 stub_sec = stub_sec->next)
9817 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
9818 {
9819 stub_sec->rawsize = stub_sec->size;
9820 stub_sec->size = 0;
9821 stub_sec->reloc_count = 0;
9822 stub_sec->flags &= ~SEC_RELOC;
9823 }
9824
9825 htab->brlt->size = 0;
9826 htab->brlt->reloc_count = 0;
9827 htab->brlt->flags &= ~SEC_RELOC;
9828 if (htab->relbrlt != NULL)
9829 htab->relbrlt->size = 0;
9830
9831 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
9832
9833 if (info->emitrelocations
9834 && htab->glink != NULL && htab->glink->size != 0)
9835 {
9836 htab->glink->reloc_count = 1;
9837 htab->glink->flags |= SEC_RELOC;
9838 }
9839
9840 for (stub_sec = htab->stub_bfd->sections;
9841 stub_sec != NULL;
9842 stub_sec = stub_sec->next)
9843 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9844 && stub_sec->rawsize != stub_sec->size)
9845 break;
9846
9847 /* Exit from this loop when no stubs have been added, and no stubs
9848 have changed size. */
9849 if (stub_sec == NULL)
9850 break;
9851
9852 /* Ask the linker to do its stuff. */
9853 (*htab->layout_sections_again) ();
9854 }
9855
9856 /* It would be nice to strip htab->brlt from the output if the
9857 section is empty, but it's too late. If we strip sections here,
9858 the dynamic symbol table is corrupted since the section symbol
9859 for the stripped section isn't written. */
9860
9861 return TRUE;
9862 }
9863
9864 /* Called after we have determined section placement. If sections
9865 move, we'll be called again. Provide a value for TOCstart. */
9866
9867 bfd_vma
9868 ppc64_elf_toc (bfd *obfd)
9869 {
9870 asection *s;
9871 bfd_vma TOCstart;
9872
9873 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
9874 order. The TOC starts where the first of these sections starts. */
9875 s = bfd_get_section_by_name (obfd, ".got");
9876 if (s == NULL)
9877 s = bfd_get_section_by_name (obfd, ".toc");
9878 if (s == NULL)
9879 s = bfd_get_section_by_name (obfd, ".tocbss");
9880 if (s == NULL)
9881 s = bfd_get_section_by_name (obfd, ".plt");
9882 if (s == NULL)
9883 {
9884 /* This may happen for
9885 o references to TOC base (SYM@toc / TOC[tc0]) without a
9886 .toc directive
9887 o bad linker script
9888 o --gc-sections and empty TOC sections
9889
9890 FIXME: Warn user? */
9891
9892 /* Look for a likely section. We probably won't even be
9893 using TOCstart. */
9894 for (s = obfd->sections; s != NULL; s = s->next)
9895 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
9896 == (SEC_ALLOC | SEC_SMALL_DATA))
9897 break;
9898 if (s == NULL)
9899 for (s = obfd->sections; s != NULL; s = s->next)
9900 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
9901 == (SEC_ALLOC | SEC_SMALL_DATA))
9902 break;
9903 if (s == NULL)
9904 for (s = obfd->sections; s != NULL; s = s->next)
9905 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
9906 break;
9907 if (s == NULL)
9908 for (s = obfd->sections; s != NULL; s = s->next)
9909 if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
9910 break;
9911 }
9912
9913 TOCstart = 0;
9914 if (s != NULL)
9915 TOCstart = s->output_section->vma + s->output_offset;
9916
9917 return TOCstart;
9918 }
9919
9920 /* Build all the stubs associated with the current output file.
9921 The stubs are kept in a hash table attached to the main linker
9922 hash table. This function is called via gldelf64ppc_finish. */
9923
9924 bfd_boolean
9925 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
9926 struct bfd_link_info *info,
9927 char **stats)
9928 {
9929 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9930 asection *stub_sec;
9931 bfd_byte *p;
9932 int stub_sec_count = 0;
9933
9934 htab->emit_stub_syms = emit_stub_syms;
9935
9936 /* Allocate memory to hold the linker stubs. */
9937 for (stub_sec = htab->stub_bfd->sections;
9938 stub_sec != NULL;
9939 stub_sec = stub_sec->next)
9940 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
9941 && stub_sec->size != 0)
9942 {
9943 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
9944 if (stub_sec->contents == NULL)
9945 return FALSE;
9946 /* We want to check that built size is the same as calculated
9947 size. rawsize is a convenient location to use. */
9948 stub_sec->rawsize = stub_sec->size;
9949 stub_sec->size = 0;
9950 }
9951
9952 if (htab->glink != NULL && htab->glink->size != 0)
9953 {
9954 unsigned int indx;
9955 bfd_vma plt0;
9956
9957 /* Build the .glink plt call stub. */
9958 if (htab->emit_stub_syms)
9959 {
9960 struct elf_link_hash_entry *h;
9961 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
9962 TRUE, FALSE, FALSE);
9963 if (h == NULL)
9964 return FALSE;
9965 if (h->root.type == bfd_link_hash_new)
9966 {
9967 h->root.type = bfd_link_hash_defined;
9968 h->root.u.def.section = htab->glink;
9969 h->root.u.def.value = 8;
9970 h->ref_regular = 1;
9971 h->def_regular = 1;
9972 h->ref_regular_nonweak = 1;
9973 h->forced_local = 1;
9974 h->non_elf = 0;
9975 }
9976 }
9977 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
9978 if (info->emitrelocations)
9979 {
9980 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
9981 if (r == NULL)
9982 return FALSE;
9983 r->r_offset = (htab->glink->output_offset
9984 + htab->glink->output_section->vma);
9985 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
9986 r->r_addend = plt0;
9987 }
9988 p = htab->glink->contents;
9989 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
9990 bfd_put_64 (htab->glink->owner, plt0, p);
9991 p += 8;
9992 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
9993 p += 4;
9994 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
9995 p += 4;
9996 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
9997 p += 4;
9998 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
9999 p += 4;
10000 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
10001 p += 4;
10002 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
10003 p += 4;
10004 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
10005 p += 4;
10006 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
10007 p += 4;
10008 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
10009 p += 4;
10010 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
10011 p += 4;
10012 bfd_put_32 (htab->glink->owner, BCTR, p);
10013 p += 4;
10014 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
10015 {
10016 bfd_put_32 (htab->glink->owner, NOP, p);
10017 p += 4;
10018 }
10019
10020 /* Build the .glink lazy link call stubs. */
10021 indx = 0;
10022 while (p < htab->glink->contents + htab->glink->size)
10023 {
10024 if (indx < 0x8000)
10025 {
10026 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
10027 p += 4;
10028 }
10029 else
10030 {
10031 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
10032 p += 4;
10033 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
10034 p += 4;
10035 }
10036 bfd_put_32 (htab->glink->owner,
10037 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
10038 indx++;
10039 p += 4;
10040 }
10041 htab->glink->rawsize = p - htab->glink->contents;
10042 }
10043
10044 if (htab->brlt->size != 0)
10045 {
10046 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
10047 htab->brlt->size);
10048 if (htab->brlt->contents == NULL)
10049 return FALSE;
10050 }
10051 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
10052 {
10053 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
10054 htab->relbrlt->size);
10055 if (htab->relbrlt->contents == NULL)
10056 return FALSE;
10057 }
10058
10059 /* Build the stubs as directed by the stub hash table. */
10060 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
10061
10062 if (htab->relbrlt != NULL)
10063 htab->relbrlt->reloc_count = 0;
10064
10065 for (stub_sec = htab->stub_bfd->sections;
10066 stub_sec != NULL;
10067 stub_sec = stub_sec->next)
10068 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
10069 {
10070 stub_sec_count += 1;
10071 if (stub_sec->rawsize != stub_sec->size)
10072 break;
10073 }
10074
10075 if (stub_sec != NULL
10076 || htab->glink->rawsize != htab->glink->size)
10077 {
10078 htab->stub_error = TRUE;
10079 (*_bfd_error_handler) (_("stubs don't match calculated size"));
10080 }
10081
10082 if (htab->stub_error)
10083 return FALSE;
10084
10085 if (stats != NULL)
10086 {
10087 *stats = bfd_malloc (500);
10088 if (*stats == NULL)
10089 return FALSE;
10090
10091 sprintf (*stats, _("linker stubs in %u group%s\n"
10092 " branch %lu\n"
10093 " toc adjust %lu\n"
10094 " long branch %lu\n"
10095 " long toc adj %lu\n"
10096 " plt call %lu"),
10097 stub_sec_count,
10098 stub_sec_count == 1 ? "" : "s",
10099 htab->stub_count[ppc_stub_long_branch - 1],
10100 htab->stub_count[ppc_stub_long_branch_r2off - 1],
10101 htab->stub_count[ppc_stub_plt_branch - 1],
10102 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
10103 htab->stub_count[ppc_stub_plt_call - 1]);
10104 }
10105 return TRUE;
10106 }
10107
10108 /* This function undoes the changes made by add_symbol_adjust. */
10109
10110 static bfd_boolean
10111 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10112 {
10113 struct ppc_link_hash_entry *eh;
10114
10115 if (h->root.type == bfd_link_hash_indirect)
10116 return TRUE;
10117
10118 if (h->root.type == bfd_link_hash_warning)
10119 h = (struct elf_link_hash_entry *) h->root.u.i.link;
10120
10121 eh = (struct ppc_link_hash_entry *) h;
10122 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
10123 return TRUE;
10124
10125 eh->elf.root.type = bfd_link_hash_undefined;
10126 return TRUE;
10127 }
10128
10129 void
10130 ppc64_elf_restore_symbols (struct bfd_link_info *info)
10131 {
10132 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10133 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
10134 }
10135
10136 /* What to do when ld finds relocations against symbols defined in
10137 discarded sections. */
10138
10139 static unsigned int
10140 ppc64_elf_action_discarded (asection *sec)
10141 {
10142 if (strcmp (".opd", sec->name) == 0)
10143 return 0;
10144
10145 if (strcmp (".toc", sec->name) == 0)
10146 return 0;
10147
10148 if (strcmp (".toc1", sec->name) == 0)
10149 return 0;
10150
10151 return _bfd_elf_default_action_discarded (sec);
10152 }
10153
10154 /* The RELOCATE_SECTION function is called by the ELF backend linker
10155 to handle the relocations for a section.
10156
10157 The relocs are always passed as Rela structures; if the section
10158 actually uses Rel structures, the r_addend field will always be
10159 zero.
10160
10161 This function is responsible for adjust the section contents as
10162 necessary, and (if using Rela relocs and generating a
10163 relocatable output file) adjusting the reloc addend as
10164 necessary.
10165
10166 This function does not have to worry about setting the reloc
10167 address or the reloc symbol index.
10168
10169 LOCAL_SYMS is a pointer to the swapped in local symbols.
10170
10171 LOCAL_SECTIONS is an array giving the section in the input file
10172 corresponding to the st_shndx field of each local symbol.
10173
10174 The global hash table entry for the global symbols can be found
10175 via elf_sym_hashes (input_bfd).
10176
10177 When generating relocatable output, this function must handle
10178 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
10179 going to be the section symbol corresponding to the output
10180 section, which means that the addend must be adjusted
10181 accordingly. */
10182
10183 static bfd_boolean
10184 ppc64_elf_relocate_section (bfd *output_bfd,
10185 struct bfd_link_info *info,
10186 bfd *input_bfd,
10187 asection *input_section,
10188 bfd_byte *contents,
10189 Elf_Internal_Rela *relocs,
10190 Elf_Internal_Sym *local_syms,
10191 asection **local_sections)
10192 {
10193 struct ppc_link_hash_table *htab;
10194 Elf_Internal_Shdr *symtab_hdr;
10195 struct elf_link_hash_entry **sym_hashes;
10196 Elf_Internal_Rela *rel;
10197 Elf_Internal_Rela *relend;
10198 Elf_Internal_Rela outrel;
10199 bfd_byte *loc;
10200 struct got_entry **local_got_ents;
10201 bfd_vma TOCstart;
10202 bfd_boolean ret = TRUE;
10203 bfd_boolean is_opd;
10204 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
10205 bfd_boolean is_power4 = FALSE;
10206 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
10207
10208 /* Initialize howto table if needed. */
10209 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
10210 ppc_howto_init ();
10211
10212 htab = ppc_hash_table (info);
10213
10214 /* Don't relocate stub sections. */
10215 if (input_section->owner == htab->stub_bfd)
10216 return TRUE;
10217
10218 BFD_ASSERT (is_ppc64_elf (input_bfd));
10219
10220 local_got_ents = elf_local_got_ents (input_bfd);
10221 TOCstart = elf_gp (output_bfd);
10222 symtab_hdr = &elf_symtab_hdr (input_bfd);
10223 sym_hashes = elf_sym_hashes (input_bfd);
10224 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
10225
10226 rel = relocs;
10227 relend = relocs + input_section->reloc_count;
10228 for (; rel < relend; rel++)
10229 {
10230 enum elf_ppc64_reloc_type r_type;
10231 bfd_vma addend, orig_addend;
10232 bfd_reloc_status_type r;
10233 Elf_Internal_Sym *sym;
10234 asection *sec;
10235 struct elf_link_hash_entry *h_elf;
10236 struct ppc_link_hash_entry *h;
10237 struct ppc_link_hash_entry *fdh;
10238 const char *sym_name;
10239 unsigned long r_symndx, toc_symndx;
10240 char tls_mask, tls_gd, tls_type;
10241 char sym_type;
10242 bfd_vma relocation;
10243 bfd_boolean unresolved_reloc;
10244 bfd_boolean warned;
10245 unsigned long insn, mask;
10246 struct ppc_stub_hash_entry *stub_entry;
10247 bfd_vma max_br_offset;
10248 bfd_vma from;
10249
10250 r_type = ELF64_R_TYPE (rel->r_info);
10251 r_symndx = ELF64_R_SYM (rel->r_info);
10252
10253 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
10254 symbol of the previous ADDR64 reloc. The symbol gives us the
10255 proper TOC base to use. */
10256 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
10257 && rel != relocs
10258 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
10259 && is_opd)
10260 r_symndx = ELF64_R_SYM (rel[-1].r_info);
10261
10262 sym = NULL;
10263 sec = NULL;
10264 h_elf = NULL;
10265 sym_name = NULL;
10266 unresolved_reloc = FALSE;
10267 warned = FALSE;
10268 orig_addend = rel->r_addend;
10269
10270 if (r_symndx < symtab_hdr->sh_info)
10271 {
10272 /* It's a local symbol. */
10273 struct _opd_sec_data *opd;
10274
10275 sym = local_syms + r_symndx;
10276 sec = local_sections[r_symndx];
10277 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
10278 sym_type = ELF64_ST_TYPE (sym->st_info);
10279 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
10280 opd = get_opd_info (sec);
10281 if (opd != NULL && opd->adjust != NULL)
10282 {
10283 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
10284 if (adjust == -1)
10285 relocation = 0;
10286 else
10287 {
10288 /* If this is a relocation against the opd section sym
10289 and we have edited .opd, adjust the reloc addend so
10290 that ld -r and ld --emit-relocs output is correct.
10291 If it is a reloc against some other .opd symbol,
10292 then the symbol value will be adjusted later. */
10293 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
10294 rel->r_addend += adjust;
10295 else
10296 relocation += adjust;
10297 }
10298 }
10299 }
10300 else
10301 {
10302 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
10303 r_symndx, symtab_hdr, sym_hashes,
10304 h_elf, sec, relocation,
10305 unresolved_reloc, warned);
10306 sym_name = h_elf->root.root.string;
10307 sym_type = h_elf->type;
10308 }
10309 h = (struct ppc_link_hash_entry *) h_elf;
10310
10311 if (sec != NULL && elf_discarded_section (sec))
10312 {
10313 /* For relocs against symbols from removed linkonce sections,
10314 or sections discarded by a linker script, we just want the
10315 section contents zeroed. Avoid any special processing. */
10316 _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
10317 contents + rel->r_offset);
10318 rel->r_info = 0;
10319 rel->r_addend = 0;
10320 continue;
10321 }
10322
10323 if (info->relocatable)
10324 continue;
10325
10326 /* TLS optimizations. Replace instruction sequences and relocs
10327 based on information we collected in tls_optimize. We edit
10328 RELOCS so that --emit-relocs will output something sensible
10329 for the final instruction stream. */
10330 tls_mask = 0;
10331 tls_gd = 0;
10332 toc_symndx = 0;
10333 if (IS_PPC64_TLS_RELOC (r_type))
10334 {
10335 if (h != NULL)
10336 tls_mask = h->tls_mask;
10337 else if (local_got_ents != NULL)
10338 {
10339 char *lgot_masks;
10340 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info);
10341 tls_mask = lgot_masks[r_symndx];
10342 }
10343 if (tls_mask == 0 && r_type == R_PPC64_TLS)
10344 {
10345 /* Check for toc tls entries. */
10346 char *toc_tls;
10347
10348 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10349 rel, input_bfd))
10350 return FALSE;
10351
10352 if (toc_tls)
10353 tls_mask = *toc_tls;
10354 }
10355 }
10356
10357 /* Check that tls relocs are used with tls syms, and non-tls
10358 relocs are used with non-tls syms. */
10359 if (r_symndx != 0
10360 && r_type != R_PPC64_NONE
10361 && (h == NULL
10362 || h->elf.root.type == bfd_link_hash_defined
10363 || h->elf.root.type == bfd_link_hash_defweak)
10364 && (IS_PPC64_TLS_RELOC (r_type)
10365 != (sym_type == STT_TLS
10366 || (sym_type == STT_SECTION
10367 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
10368 {
10369 if (r_type == R_PPC64_TLS && tls_mask != 0)
10370 /* R_PPC64_TLS is OK against a symbol in the TOC. */
10371 ;
10372 else
10373 (*_bfd_error_handler)
10374 (!IS_PPC64_TLS_RELOC (r_type)
10375 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
10376 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s"),
10377 input_bfd,
10378 input_section,
10379 (long) rel->r_offset,
10380 ppc64_elf_howto_table[r_type]->name,
10381 sym_name);
10382 }
10383
10384 /* Ensure reloc mapping code below stays sane. */
10385 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
10386 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
10387 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
10388 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
10389 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
10390 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
10391 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
10392 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
10393 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
10394 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
10395 abort ();
10396
10397 switch (r_type)
10398 {
10399 default:
10400 break;
10401
10402 case R_PPC64_TOC16:
10403 case R_PPC64_TOC16_LO:
10404 case R_PPC64_TOC16_DS:
10405 case R_PPC64_TOC16_LO_DS:
10406 {
10407 /* Check for toc tls entries. */
10408 char *toc_tls;
10409 int retval;
10410
10411 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms,
10412 rel, input_bfd);
10413 if (retval == 0)
10414 return FALSE;
10415
10416 if (toc_tls)
10417 {
10418 tls_mask = *toc_tls;
10419 if (r_type == R_PPC64_TOC16_DS
10420 || r_type == R_PPC64_TOC16_LO_DS)
10421 {
10422 if (tls_mask != 0
10423 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
10424 goto toctprel;
10425 }
10426 else
10427 {
10428 /* If we found a GD reloc pair, then we might be
10429 doing a GD->IE transition. */
10430 if (retval == 2)
10431 {
10432 tls_gd = TLS_TPRELGD;
10433 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10434 goto tls_ldgd_opt;
10435 }
10436 else if (retval == 3)
10437 {
10438 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10439 goto tls_ldgd_opt;
10440 }
10441 }
10442 }
10443 }
10444 break;
10445
10446 case R_PPC64_GOT_TPREL16_DS:
10447 case R_PPC64_GOT_TPREL16_LO_DS:
10448 if (tls_mask != 0
10449 && (tls_mask & TLS_TPREL) == 0)
10450 {
10451 toctprel:
10452 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
10453 insn &= 31 << 21;
10454 insn |= 0x3c0d0000; /* addis 0,13,0 */
10455 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
10456 r_type = R_PPC64_TPREL16_HA;
10457 if (toc_symndx != 0)
10458 {
10459 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10460 /* We changed the symbol. Start over in order to
10461 get h, sym, sec etc. right. */
10462 rel--;
10463 continue;
10464 }
10465 else
10466 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10467 }
10468 break;
10469
10470 case R_PPC64_TLS:
10471 if (tls_mask != 0
10472 && (tls_mask & TLS_TPREL) == 0)
10473 {
10474 bfd_vma rtra;
10475 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
10476 if ((insn & ((0x3f << 26) | (31 << 11)))
10477 == ((31 << 26) | (13 << 11)))
10478 rtra = insn & ((1 << 26) - (1 << 16));
10479 else if ((insn & ((0x3f << 26) | (31 << 16)))
10480 == ((31 << 26) | (13 << 16)))
10481 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
10482 else
10483 abort ();
10484 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
10485 /* add -> addi. */
10486 insn = 14 << 26;
10487 else if ((insn & (31 << 1)) == 23 << 1
10488 && ((insn & (31 << 6)) < 14 << 6
10489 || ((insn & (31 << 6)) >= 16 << 6
10490 && (insn & (31 << 6)) < 24 << 6)))
10491 /* load and store indexed -> dform. */
10492 insn = (32 | ((insn >> 6) & 31)) << 26;
10493 else if ((insn & (31 << 1)) == 21 << 1
10494 && (insn & (0x1a << 6)) == 0)
10495 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
10496 insn = (((58 | ((insn >> 6) & 4)) << 26)
10497 | ((insn >> 6) & 1));
10498 else if ((insn & (31 << 1)) == 21 << 1
10499 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
10500 /* lwax -> lwa. */
10501 insn = (58 << 26) | 2;
10502 else
10503 abort ();
10504 insn |= rtra;
10505 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10506 /* Was PPC64_TLS which sits on insn boundary, now
10507 PPC64_TPREL16_LO which is at low-order half-word. */
10508 rel->r_offset += d_offset;
10509 r_type = R_PPC64_TPREL16_LO;
10510 if (toc_symndx != 0)
10511 {
10512 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
10513 /* We changed the symbol. Start over in order to
10514 get h, sym, sec etc. right. */
10515 rel--;
10516 continue;
10517 }
10518 else
10519 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10520 }
10521 break;
10522
10523 case R_PPC64_GOT_TLSGD16_HI:
10524 case R_PPC64_GOT_TLSGD16_HA:
10525 tls_gd = TLS_TPRELGD;
10526 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10527 goto tls_gdld_hi;
10528 break;
10529
10530 case R_PPC64_GOT_TLSLD16_HI:
10531 case R_PPC64_GOT_TLSLD16_HA:
10532 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10533 {
10534 tls_gdld_hi:
10535 if ((tls_mask & tls_gd) != 0)
10536 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10537 + R_PPC64_GOT_TPREL16_DS);
10538 else
10539 {
10540 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10541 rel->r_offset -= d_offset;
10542 r_type = R_PPC64_NONE;
10543 }
10544 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10545 }
10546 break;
10547
10548 case R_PPC64_GOT_TLSGD16:
10549 case R_PPC64_GOT_TLSGD16_LO:
10550 tls_gd = TLS_TPRELGD;
10551 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
10552 goto tls_ldgd_opt;
10553 break;
10554
10555 case R_PPC64_GOT_TLSLD16:
10556 case R_PPC64_GOT_TLSLD16_LO:
10557 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
10558 {
10559 bfd_vma insn1, insn2, insn3;
10560 bfd_vma offset;
10561
10562 tls_ldgd_opt:
10563 /* We know that the next reloc is on a tls_get_addr
10564 call, since ppc64_elf_tls_optimize checks this. */
10565 offset = rel[1].r_offset;
10566 insn1 = bfd_get_32 (output_bfd,
10567 contents + rel->r_offset - d_offset);
10568 insn3 = bfd_get_32 (output_bfd,
10569 contents + offset + 4);
10570 if ((tls_mask & tls_gd) != 0)
10571 {
10572 /* IE */
10573 insn1 &= (1 << 26) - (1 << 2);
10574 insn1 |= 58 << 26; /* ld */
10575 insn2 = 0x7c636a14; /* add 3,3,13 */
10576 rel[1].r_info = ELF64_R_INFO (ELF64_R_SYM (rel[1].r_info),
10577 R_PPC64_NONE);
10578 if ((tls_mask & TLS_EXPLICIT) == 0)
10579 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
10580 + R_PPC64_GOT_TPREL16_DS);
10581 else
10582 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
10583 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10584 }
10585 else
10586 {
10587 /* LE */
10588 insn1 = 0x3c6d0000; /* addis 3,13,0 */
10589 insn2 = 0x38630000; /* addi 3,3,0 */
10590 if (tls_gd == 0)
10591 {
10592 /* Was an LD reloc. */
10593 if (toc_symndx)
10594 sec = local_sections[toc_symndx];
10595 for (r_symndx = 0;
10596 r_symndx < symtab_hdr->sh_info;
10597 r_symndx++)
10598 if (local_sections[r_symndx] == sec)
10599 break;
10600 if (r_symndx >= symtab_hdr->sh_info)
10601 r_symndx = 0;
10602 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
10603 if (r_symndx != 0)
10604 rel->r_addend -= (local_syms[r_symndx].st_value
10605 + sec->output_offset
10606 + sec->output_section->vma);
10607 rel[1].r_addend = rel->r_addend;
10608 }
10609 else if (toc_symndx != 0)
10610 r_symndx = toc_symndx;
10611 r_type = R_PPC64_TPREL16_HA;
10612 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10613 rel[1].r_info = ELF64_R_INFO (r_symndx,
10614 R_PPC64_TPREL16_LO);
10615 rel[1].r_offset += d_offset;
10616 }
10617 if (insn3 == NOP
10618 || insn3 == CROR_151515 || insn3 == CROR_313131)
10619 {
10620 insn3 = insn2;
10621 insn2 = NOP;
10622 rel[1].r_offset += 4;
10623 }
10624 bfd_put_32 (output_bfd, insn1,
10625 contents + rel->r_offset - d_offset);
10626 bfd_put_32 (output_bfd, insn2, contents + offset);
10627 bfd_put_32 (output_bfd, insn3, contents + offset + 4);
10628 if (tls_gd == 0 || toc_symndx != 0)
10629 {
10630 /* We changed the symbol. Start over in order
10631 to get h, sym, sec etc. right. */
10632 rel--;
10633 continue;
10634 }
10635 }
10636 break;
10637
10638 case R_PPC64_DTPMOD64:
10639 if (rel + 1 < relend
10640 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
10641 && rel[1].r_offset == rel->r_offset + 8)
10642 {
10643 if ((tls_mask & TLS_GD) == 0)
10644 {
10645 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
10646 if ((tls_mask & TLS_TPRELGD) != 0)
10647 r_type = R_PPC64_TPREL64;
10648 else
10649 {
10650 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10651 r_type = R_PPC64_NONE;
10652 }
10653 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10654 }
10655 }
10656 else
10657 {
10658 if ((tls_mask & TLS_LD) == 0)
10659 {
10660 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
10661 r_type = R_PPC64_NONE;
10662 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10663 }
10664 }
10665 break;
10666
10667 case R_PPC64_TPREL64:
10668 if ((tls_mask & TLS_TPREL) == 0)
10669 {
10670 r_type = R_PPC64_NONE;
10671 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
10672 }
10673 break;
10674 }
10675
10676 /* Handle other relocations that tweak non-addend part of insn. */
10677 insn = 0;
10678 max_br_offset = 1 << 25;
10679 addend = rel->r_addend;
10680 switch (r_type)
10681 {
10682 default:
10683 break;
10684
10685 /* Branch taken prediction relocations. */
10686 case R_PPC64_ADDR14_BRTAKEN:
10687 case R_PPC64_REL14_BRTAKEN:
10688 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
10689 /* Fall thru. */
10690
10691 /* Branch not taken prediction relocations. */
10692 case R_PPC64_ADDR14_BRNTAKEN:
10693 case R_PPC64_REL14_BRNTAKEN:
10694 insn |= bfd_get_32 (output_bfd,
10695 contents + rel->r_offset) & ~(0x01 << 21);
10696 /* Fall thru. */
10697
10698 case R_PPC64_REL14:
10699 max_br_offset = 1 << 15;
10700 /* Fall thru. */
10701
10702 case R_PPC64_REL24:
10703 /* Calls to functions with a different TOC, such as calls to
10704 shared objects, need to alter the TOC pointer. This is
10705 done using a linkage stub. A REL24 branching to these
10706 linkage stubs needs to be followed by a nop, as the nop
10707 will be replaced with an instruction to restore the TOC
10708 base pointer. */
10709 stub_entry = NULL;
10710 fdh = h;
10711 if (((h != NULL
10712 && (((fdh = h->oh) != NULL
10713 && fdh->elf.plt.plist != NULL)
10714 || (fdh = h)->elf.plt.plist != NULL))
10715 || (sec != NULL
10716 && sec->output_section != NULL
10717 && sec->id <= htab->top_id
10718 && (htab->stub_group[sec->id].toc_off
10719 != htab->stub_group[input_section->id].toc_off)))
10720 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
10721 rel, htab)) != NULL
10722 && (stub_entry->stub_type == ppc_stub_plt_call
10723 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
10724 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
10725 {
10726 bfd_boolean can_plt_call = FALSE;
10727
10728 if (rel->r_offset + 8 <= input_section->size)
10729 {
10730 unsigned long nop;
10731 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
10732 if (nop == NOP
10733 || nop == CROR_151515 || nop == CROR_313131)
10734 {
10735 bfd_put_32 (input_bfd, LD_R2_40R1,
10736 contents + rel->r_offset + 4);
10737 can_plt_call = TRUE;
10738 }
10739 }
10740
10741 if (!can_plt_call)
10742 {
10743 if (stub_entry->stub_type == ppc_stub_plt_call)
10744 {
10745 /* If this is a plain branch rather than a branch
10746 and link, don't require a nop. However, don't
10747 allow tail calls in a shared library as they
10748 will result in r2 being corrupted. */
10749 unsigned long br;
10750 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
10751 if (info->executable && (br & 1) == 0)
10752 can_plt_call = TRUE;
10753 else
10754 stub_entry = NULL;
10755 }
10756 else if (h != NULL
10757 && strcmp (h->elf.root.root.string,
10758 ".__libc_start_main") == 0)
10759 {
10760 /* Allow crt1 branch to go via a toc adjusting stub. */
10761 can_plt_call = TRUE;
10762 }
10763 else
10764 {
10765 if (strcmp (input_section->output_section->name,
10766 ".init") == 0
10767 || strcmp (input_section->output_section->name,
10768 ".fini") == 0)
10769 (*_bfd_error_handler)
10770 (_("%B(%A+0x%lx): automatic multiple TOCs "
10771 "not supported using your crt files; "
10772 "recompile with -mminimal-toc or upgrade gcc"),
10773 input_bfd,
10774 input_section,
10775 (long) rel->r_offset);
10776 else
10777 (*_bfd_error_handler)
10778 (_("%B(%A+0x%lx): sibling call optimization to `%s' "
10779 "does not allow automatic multiple TOCs; "
10780 "recompile with -mminimal-toc or "
10781 "-fno-optimize-sibling-calls, "
10782 "or make `%s' extern"),
10783 input_bfd,
10784 input_section,
10785 (long) rel->r_offset,
10786 sym_name,
10787 sym_name);
10788 bfd_set_error (bfd_error_bad_value);
10789 ret = FALSE;
10790 }
10791 }
10792
10793 if (can_plt_call
10794 && stub_entry->stub_type == ppc_stub_plt_call)
10795 unresolved_reloc = FALSE;
10796 }
10797
10798 if (stub_entry == NULL
10799 && get_opd_info (sec) != NULL)
10800 {
10801 /* The branch destination is the value of the opd entry. */
10802 bfd_vma off = (relocation + addend
10803 - sec->output_section->vma
10804 - sec->output_offset);
10805 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
10806 if (dest != (bfd_vma) -1)
10807 {
10808 relocation = dest;
10809 addend = 0;
10810 }
10811 }
10812
10813 /* If the branch is out of reach we ought to have a long
10814 branch stub. */
10815 from = (rel->r_offset
10816 + input_section->output_offset
10817 + input_section->output_section->vma);
10818
10819 if (stub_entry == NULL
10820 && (relocation + addend - from + max_br_offset
10821 >= 2 * max_br_offset)
10822 && r_type != R_PPC64_ADDR14_BRTAKEN
10823 && r_type != R_PPC64_ADDR14_BRNTAKEN)
10824 stub_entry = ppc_get_stub_entry (input_section, sec, h, rel,
10825 htab);
10826
10827 if (stub_entry != NULL)
10828 {
10829 /* Munge up the value and addend so that we call the stub
10830 rather than the procedure directly. */
10831 relocation = (stub_entry->stub_offset
10832 + stub_entry->stub_sec->output_offset
10833 + stub_entry->stub_sec->output_section->vma);
10834 addend = 0;
10835 }
10836
10837 if (insn != 0)
10838 {
10839 if (is_power4)
10840 {
10841 /* Set 'a' bit. This is 0b00010 in BO field for branch
10842 on CR(BI) insns (BO == 001at or 011at), and 0b01000
10843 for branch on CTR insns (BO == 1a00t or 1a01t). */
10844 if ((insn & (0x14 << 21)) == (0x04 << 21))
10845 insn |= 0x02 << 21;
10846 else if ((insn & (0x14 << 21)) == (0x10 << 21))
10847 insn |= 0x08 << 21;
10848 else
10849 break;
10850 }
10851 else
10852 {
10853 /* Invert 'y' bit if not the default. */
10854 if ((bfd_signed_vma) (relocation + addend - from) < 0)
10855 insn ^= 0x01 << 21;
10856 }
10857
10858 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
10859 }
10860
10861 /* NOP out calls to undefined weak functions.
10862 We can thus call a weak function without first
10863 checking whether the function is defined. */
10864 else if (h != NULL
10865 && h->elf.root.type == bfd_link_hash_undefweak
10866 && r_type == R_PPC64_REL24
10867 && relocation == 0
10868 && addend == 0)
10869 {
10870 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
10871 continue;
10872 }
10873 break;
10874 }
10875
10876 /* Set `addend'. */
10877 tls_type = 0;
10878 switch (r_type)
10879 {
10880 default:
10881 (*_bfd_error_handler)
10882 (_("%B: unknown relocation type %d for symbol %s"),
10883 input_bfd, (int) r_type, sym_name);
10884
10885 bfd_set_error (bfd_error_bad_value);
10886 ret = FALSE;
10887 continue;
10888
10889 case R_PPC64_NONE:
10890 case R_PPC64_TLS:
10891 case R_PPC64_GNU_VTINHERIT:
10892 case R_PPC64_GNU_VTENTRY:
10893 continue;
10894
10895 /* GOT16 relocations. Like an ADDR16 using the symbol's
10896 address in the GOT as relocation value instead of the
10897 symbol's value itself. Also, create a GOT entry for the
10898 symbol and put the symbol value there. */
10899 case R_PPC64_GOT_TLSGD16:
10900 case R_PPC64_GOT_TLSGD16_LO:
10901 case R_PPC64_GOT_TLSGD16_HI:
10902 case R_PPC64_GOT_TLSGD16_HA:
10903 tls_type = TLS_TLS | TLS_GD;
10904 goto dogot;
10905
10906 case R_PPC64_GOT_TLSLD16:
10907 case R_PPC64_GOT_TLSLD16_LO:
10908 case R_PPC64_GOT_TLSLD16_HI:
10909 case R_PPC64_GOT_TLSLD16_HA:
10910 tls_type = TLS_TLS | TLS_LD;
10911 goto dogot;
10912
10913 case R_PPC64_GOT_TPREL16_DS:
10914 case R_PPC64_GOT_TPREL16_LO_DS:
10915 case R_PPC64_GOT_TPREL16_HI:
10916 case R_PPC64_GOT_TPREL16_HA:
10917 tls_type = TLS_TLS | TLS_TPREL;
10918 goto dogot;
10919
10920 case R_PPC64_GOT_DTPREL16_DS:
10921 case R_PPC64_GOT_DTPREL16_LO_DS:
10922 case R_PPC64_GOT_DTPREL16_HI:
10923 case R_PPC64_GOT_DTPREL16_HA:
10924 tls_type = TLS_TLS | TLS_DTPREL;
10925 goto dogot;
10926
10927 case R_PPC64_GOT16:
10928 case R_PPC64_GOT16_LO:
10929 case R_PPC64_GOT16_HI:
10930 case R_PPC64_GOT16_HA:
10931 case R_PPC64_GOT16_DS:
10932 case R_PPC64_GOT16_LO_DS:
10933 dogot:
10934 {
10935 /* Relocation is to the entry for this symbol in the global
10936 offset table. */
10937 asection *got;
10938 bfd_vma *offp;
10939 bfd_vma off;
10940 unsigned long indx = 0;
10941
10942 if (tls_type == (TLS_TLS | TLS_LD)
10943 && (h == NULL
10944 || !h->elf.def_dynamic))
10945 offp = &ppc64_tlsld_got (input_bfd)->offset;
10946 else
10947 {
10948 struct got_entry *ent;
10949
10950 if (h != NULL)
10951 {
10952 bfd_boolean dyn = htab->elf.dynamic_sections_created;
10953 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
10954 &h->elf)
10955 || (info->shared
10956 && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
10957 /* This is actually a static link, or it is a
10958 -Bsymbolic link and the symbol is defined
10959 locally, or the symbol was forced to be local
10960 because of a version file. */
10961 ;
10962 else
10963 {
10964 indx = h->elf.dynindx;
10965 unresolved_reloc = FALSE;
10966 }
10967 ent = h->elf.got.glist;
10968 }
10969 else
10970 {
10971 if (local_got_ents == NULL)
10972 abort ();
10973 ent = local_got_ents[r_symndx];
10974 }
10975
10976 for (; ent != NULL; ent = ent->next)
10977 if (ent->addend == orig_addend
10978 && ent->owner == input_bfd
10979 && ent->tls_type == tls_type)
10980 break;
10981 if (ent == NULL)
10982 abort ();
10983 offp = &ent->got.offset;
10984 }
10985
10986 got = ppc64_elf_tdata (input_bfd)->got;
10987 if (got == NULL)
10988 abort ();
10989
10990 /* The offset must always be a multiple of 8. We use the
10991 least significant bit to record whether we have already
10992 processed this entry. */
10993 off = *offp;
10994 if ((off & 1) != 0)
10995 off &= ~1;
10996 else
10997 {
10998 /* Generate relocs for the dynamic linker, except in
10999 the case of TLSLD where we'll use one entry per
11000 module. */
11001 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot;
11002
11003 *offp = off | 1;
11004 if ((info->shared || indx != 0)
11005 && (h == NULL
11006 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11007 || h->elf.root.type != bfd_link_hash_undefweak))
11008 {
11009 outrel.r_offset = (got->output_section->vma
11010 + got->output_offset
11011 + off);
11012 outrel.r_addend = addend;
11013 if (tls_type & (TLS_LD | TLS_GD))
11014 {
11015 outrel.r_addend = 0;
11016 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
11017 if (tls_type == (TLS_TLS | TLS_GD))
11018 {
11019 loc = relgot->contents;
11020 loc += (relgot->reloc_count++
11021 * sizeof (Elf64_External_Rela));
11022 bfd_elf64_swap_reloca_out (output_bfd,
11023 &outrel, loc);
11024 outrel.r_offset += 8;
11025 outrel.r_addend = addend;
11026 outrel.r_info
11027 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11028 }
11029 }
11030 else if (tls_type == (TLS_TLS | TLS_DTPREL))
11031 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
11032 else if (tls_type == (TLS_TLS | TLS_TPREL))
11033 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
11034 else if (indx == 0)
11035 {
11036 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE);
11037
11038 /* Write the .got section contents for the sake
11039 of prelink. */
11040 loc = got->contents + off;
11041 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
11042 loc);
11043 }
11044 else
11045 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
11046
11047 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
11048 {
11049 outrel.r_addend += relocation;
11050 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
11051 outrel.r_addend -= htab->elf.tls_sec->vma;
11052 }
11053 loc = relgot->contents;
11054 loc += (relgot->reloc_count++
11055 * sizeof (Elf64_External_Rela));
11056 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11057 }
11058
11059 /* Init the .got section contents here if we're not
11060 emitting a reloc. */
11061 else
11062 {
11063 relocation += addend;
11064 if (tls_type == (TLS_TLS | TLS_LD))
11065 relocation = 1;
11066 else if (tls_type != 0)
11067 {
11068 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
11069 if (tls_type == (TLS_TLS | TLS_TPREL))
11070 relocation += DTP_OFFSET - TP_OFFSET;
11071
11072 if (tls_type == (TLS_TLS | TLS_GD))
11073 {
11074 bfd_put_64 (output_bfd, relocation,
11075 got->contents + off + 8);
11076 relocation = 1;
11077 }
11078 }
11079
11080 bfd_put_64 (output_bfd, relocation,
11081 got->contents + off);
11082 }
11083 }
11084
11085 if (off >= (bfd_vma) -2)
11086 abort ();
11087
11088 relocation = got->output_offset + off;
11089
11090 /* TOC base (r2) is TOC start plus 0x8000. */
11091 addend = -TOC_BASE_OFF;
11092 }
11093 break;
11094
11095 case R_PPC64_PLT16_HA:
11096 case R_PPC64_PLT16_HI:
11097 case R_PPC64_PLT16_LO:
11098 case R_PPC64_PLT32:
11099 case R_PPC64_PLT64:
11100 /* Relocation is to the entry for this symbol in the
11101 procedure linkage table. */
11102
11103 /* Resolve a PLT reloc against a local symbol directly,
11104 without using the procedure linkage table. */
11105 if (h == NULL)
11106 break;
11107
11108 /* It's possible that we didn't make a PLT entry for this
11109 symbol. This happens when statically linking PIC code,
11110 or when using -Bsymbolic. Go find a match if there is a
11111 PLT entry. */
11112 if (htab->plt != NULL)
11113 {
11114 struct plt_entry *ent;
11115 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
11116 if (ent->addend == orig_addend
11117 && ent->plt.offset != (bfd_vma) -1)
11118 {
11119 relocation = (htab->plt->output_section->vma
11120 + htab->plt->output_offset
11121 + ent->plt.offset);
11122 unresolved_reloc = FALSE;
11123 }
11124 }
11125 break;
11126
11127 case R_PPC64_TOC:
11128 /* Relocation value is TOC base. */
11129 relocation = TOCstart;
11130 if (r_symndx == 0)
11131 relocation += htab->stub_group[input_section->id].toc_off;
11132 else if (unresolved_reloc)
11133 ;
11134 else if (sec != NULL && sec->id <= htab->top_id)
11135 relocation += htab->stub_group[sec->id].toc_off;
11136 else
11137 unresolved_reloc = TRUE;
11138 goto dodyn;
11139
11140 /* TOC16 relocs. We want the offset relative to the TOC base,
11141 which is the address of the start of the TOC plus 0x8000.
11142 The TOC consists of sections .got, .toc, .tocbss, and .plt,
11143 in this order. */
11144 case R_PPC64_TOC16:
11145 case R_PPC64_TOC16_LO:
11146 case R_PPC64_TOC16_HI:
11147 case R_PPC64_TOC16_DS:
11148 case R_PPC64_TOC16_LO_DS:
11149 case R_PPC64_TOC16_HA:
11150 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
11151 break;
11152
11153 /* Relocate against the beginning of the section. */
11154 case R_PPC64_SECTOFF:
11155 case R_PPC64_SECTOFF_LO:
11156 case R_PPC64_SECTOFF_HI:
11157 case R_PPC64_SECTOFF_DS:
11158 case R_PPC64_SECTOFF_LO_DS:
11159 case R_PPC64_SECTOFF_HA:
11160 if (sec != NULL)
11161 addend -= sec->output_section->vma;
11162 break;
11163
11164 case R_PPC64_REL14:
11165 case R_PPC64_REL14_BRNTAKEN:
11166 case R_PPC64_REL14_BRTAKEN:
11167 case R_PPC64_REL24:
11168 break;
11169
11170 case R_PPC64_TPREL16:
11171 case R_PPC64_TPREL16_LO:
11172 case R_PPC64_TPREL16_HI:
11173 case R_PPC64_TPREL16_HA:
11174 case R_PPC64_TPREL16_DS:
11175 case R_PPC64_TPREL16_LO_DS:
11176 case R_PPC64_TPREL16_HIGHER:
11177 case R_PPC64_TPREL16_HIGHERA:
11178 case R_PPC64_TPREL16_HIGHEST:
11179 case R_PPC64_TPREL16_HIGHESTA:
11180 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11181 if (info->shared)
11182 /* The TPREL16 relocs shouldn't really be used in shared
11183 libs as they will result in DT_TEXTREL being set, but
11184 support them anyway. */
11185 goto dodyn;
11186 break;
11187
11188 case R_PPC64_DTPREL16:
11189 case R_PPC64_DTPREL16_LO:
11190 case R_PPC64_DTPREL16_HI:
11191 case R_PPC64_DTPREL16_HA:
11192 case R_PPC64_DTPREL16_DS:
11193 case R_PPC64_DTPREL16_LO_DS:
11194 case R_PPC64_DTPREL16_HIGHER:
11195 case R_PPC64_DTPREL16_HIGHERA:
11196 case R_PPC64_DTPREL16_HIGHEST:
11197 case R_PPC64_DTPREL16_HIGHESTA:
11198 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11199 break;
11200
11201 case R_PPC64_DTPMOD64:
11202 relocation = 1;
11203 addend = 0;
11204 goto dodyn;
11205
11206 case R_PPC64_TPREL64:
11207 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
11208 goto dodyn;
11209
11210 case R_PPC64_DTPREL64:
11211 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
11212 /* Fall thru */
11213
11214 /* Relocations that may need to be propagated if this is a
11215 dynamic object. */
11216 case R_PPC64_REL30:
11217 case R_PPC64_REL32:
11218 case R_PPC64_REL64:
11219 case R_PPC64_ADDR14:
11220 case R_PPC64_ADDR14_BRNTAKEN:
11221 case R_PPC64_ADDR14_BRTAKEN:
11222 case R_PPC64_ADDR16:
11223 case R_PPC64_ADDR16_DS:
11224 case R_PPC64_ADDR16_HA:
11225 case R_PPC64_ADDR16_HI:
11226 case R_PPC64_ADDR16_HIGHER:
11227 case R_PPC64_ADDR16_HIGHERA:
11228 case R_PPC64_ADDR16_HIGHEST:
11229 case R_PPC64_ADDR16_HIGHESTA:
11230 case R_PPC64_ADDR16_LO:
11231 case R_PPC64_ADDR16_LO_DS:
11232 case R_PPC64_ADDR24:
11233 case R_PPC64_ADDR32:
11234 case R_PPC64_ADDR64:
11235 case R_PPC64_UADDR16:
11236 case R_PPC64_UADDR32:
11237 case R_PPC64_UADDR64:
11238 dodyn:
11239 if ((input_section->flags & SEC_ALLOC) == 0)
11240 break;
11241
11242 if (NO_OPD_RELOCS && is_opd)
11243 break;
11244
11245 if ((info->shared
11246 && (h == NULL
11247 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
11248 || h->elf.root.type != bfd_link_hash_undefweak)
11249 && (must_be_dyn_reloc (info, r_type)
11250 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
11251 || (ELIMINATE_COPY_RELOCS
11252 && !info->shared
11253 && h != NULL
11254 && h->elf.dynindx != -1
11255 && !h->elf.non_got_ref
11256 && h->elf.def_dynamic
11257 && !h->elf.def_regular))
11258 {
11259 Elf_Internal_Rela outrel;
11260 bfd_boolean skip, relocate;
11261 asection *sreloc;
11262 bfd_byte *loc;
11263 bfd_vma out_off;
11264
11265 /* When generating a dynamic object, these relocations
11266 are copied into the output file to be resolved at run
11267 time. */
11268
11269 skip = FALSE;
11270 relocate = FALSE;
11271
11272 out_off = _bfd_elf_section_offset (output_bfd, info,
11273 input_section, rel->r_offset);
11274 if (out_off == (bfd_vma) -1)
11275 skip = TRUE;
11276 else if (out_off == (bfd_vma) -2)
11277 skip = TRUE, relocate = TRUE;
11278 out_off += (input_section->output_section->vma
11279 + input_section->output_offset);
11280 outrel.r_offset = out_off;
11281 outrel.r_addend = rel->r_addend;
11282
11283 /* Optimize unaligned reloc use. */
11284 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
11285 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
11286 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
11287 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
11288 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
11289 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
11290 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
11291 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
11292 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
11293
11294 if (skip)
11295 memset (&outrel, 0, sizeof outrel);
11296 else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
11297 && !is_opd
11298 && r_type != R_PPC64_TOC)
11299 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
11300 else
11301 {
11302 /* This symbol is local, or marked to become local,
11303 or this is an opd section reloc which must point
11304 at a local function. */
11305 outrel.r_addend += relocation;
11306 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
11307 {
11308 if (is_opd && h != NULL)
11309 {
11310 /* Lie about opd entries. This case occurs
11311 when building shared libraries and we
11312 reference a function in another shared
11313 lib. The same thing happens for a weak
11314 definition in an application that's
11315 overridden by a strong definition in a
11316 shared lib. (I believe this is a generic
11317 bug in binutils handling of weak syms.)
11318 In these cases we won't use the opd
11319 entry in this lib. */
11320 unresolved_reloc = FALSE;
11321 }
11322 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
11323
11324 /* We need to relocate .opd contents for ld.so.
11325 Prelink also wants simple and consistent rules
11326 for relocs. This make all RELATIVE relocs have
11327 *r_offset equal to r_addend. */
11328 relocate = TRUE;
11329 }
11330 else
11331 {
11332 long indx = 0;
11333
11334 if (r_symndx == 0 || bfd_is_abs_section (sec))
11335 ;
11336 else if (sec == NULL || sec->owner == NULL)
11337 {
11338 bfd_set_error (bfd_error_bad_value);
11339 return FALSE;
11340 }
11341 else
11342 {
11343 asection *osec;
11344
11345 osec = sec->output_section;
11346 indx = elf_section_data (osec)->dynindx;
11347
11348 if (indx == 0)
11349 {
11350 if ((osec->flags & SEC_READONLY) == 0
11351 && htab->elf.data_index_section != NULL)
11352 osec = htab->elf.data_index_section;
11353 else
11354 osec = htab->elf.text_index_section;
11355 indx = elf_section_data (osec)->dynindx;
11356 }
11357 BFD_ASSERT (indx != 0);
11358
11359 /* We are turning this relocation into one
11360 against a section symbol, so subtract out
11361 the output section's address but not the
11362 offset of the input section in the output
11363 section. */
11364 outrel.r_addend -= osec->vma;
11365 }
11366
11367 outrel.r_info = ELF64_R_INFO (indx, r_type);
11368 }
11369 }
11370
11371 sreloc = elf_section_data (input_section)->sreloc;
11372 if (sreloc == NULL)
11373 abort ();
11374
11375 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
11376 >= sreloc->size)
11377 abort ();
11378 loc = sreloc->contents;
11379 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
11380 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
11381
11382 /* If this reloc is against an external symbol, it will
11383 be computed at runtime, so there's no need to do
11384 anything now. However, for the sake of prelink ensure
11385 that the section contents are a known value. */
11386 if (! relocate)
11387 {
11388 unresolved_reloc = FALSE;
11389 /* The value chosen here is quite arbitrary as ld.so
11390 ignores section contents except for the special
11391 case of .opd where the contents might be accessed
11392 before relocation. Choose zero, as that won't
11393 cause reloc overflow. */
11394 relocation = 0;
11395 addend = 0;
11396 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
11397 to improve backward compatibility with older
11398 versions of ld. */
11399 if (r_type == R_PPC64_ADDR64)
11400 addend = outrel.r_addend;
11401 /* Adjust pc_relative relocs to have zero in *r_offset. */
11402 else if (ppc64_elf_howto_table[r_type]->pc_relative)
11403 addend = (input_section->output_section->vma
11404 + input_section->output_offset
11405 + rel->r_offset);
11406 }
11407 }
11408 break;
11409
11410 case R_PPC64_COPY:
11411 case R_PPC64_GLOB_DAT:
11412 case R_PPC64_JMP_SLOT:
11413 case R_PPC64_RELATIVE:
11414 /* We shouldn't ever see these dynamic relocs in relocatable
11415 files. */
11416 /* Fall through. */
11417
11418 case R_PPC64_PLTGOT16:
11419 case R_PPC64_PLTGOT16_DS:
11420 case R_PPC64_PLTGOT16_HA:
11421 case R_PPC64_PLTGOT16_HI:
11422 case R_PPC64_PLTGOT16_LO:
11423 case R_PPC64_PLTGOT16_LO_DS:
11424 case R_PPC64_PLTREL32:
11425 case R_PPC64_PLTREL64:
11426 /* These ones haven't been implemented yet. */
11427
11428 (*_bfd_error_handler)
11429 (_("%B: relocation %s is not supported for symbol %s."),
11430 input_bfd,
11431 ppc64_elf_howto_table[r_type]->name, sym_name);
11432
11433 bfd_set_error (bfd_error_invalid_operation);
11434 ret = FALSE;
11435 continue;
11436 }
11437
11438 /* Do any further special processing. */
11439 switch (r_type)
11440 {
11441 default:
11442 break;
11443
11444 case R_PPC64_ADDR16_HA:
11445 case R_PPC64_ADDR16_HIGHERA:
11446 case R_PPC64_ADDR16_HIGHESTA:
11447 case R_PPC64_TOC16_HA:
11448 case R_PPC64_SECTOFF_HA:
11449 case R_PPC64_TPREL16_HA:
11450 case R_PPC64_DTPREL16_HA:
11451 case R_PPC64_TPREL16_HIGHER:
11452 case R_PPC64_TPREL16_HIGHERA:
11453 case R_PPC64_TPREL16_HIGHEST:
11454 case R_PPC64_TPREL16_HIGHESTA:
11455 case R_PPC64_DTPREL16_HIGHER:
11456 case R_PPC64_DTPREL16_HIGHERA:
11457 case R_PPC64_DTPREL16_HIGHEST:
11458 case R_PPC64_DTPREL16_HIGHESTA:
11459 /* It's just possible that this symbol is a weak symbol
11460 that's not actually defined anywhere. In that case,
11461 'sec' would be NULL, and we should leave the symbol
11462 alone (it will be set to zero elsewhere in the link). */
11463 if (sec == NULL)
11464 break;
11465 /* Fall thru */
11466
11467 case R_PPC64_GOT16_HA:
11468 case R_PPC64_PLTGOT16_HA:
11469 case R_PPC64_PLT16_HA:
11470 case R_PPC64_GOT_TLSGD16_HA:
11471 case R_PPC64_GOT_TLSLD16_HA:
11472 case R_PPC64_GOT_TPREL16_HA:
11473 case R_PPC64_GOT_DTPREL16_HA:
11474 /* Add 0x10000 if sign bit in 0:15 is set.
11475 Bits 0:15 are not used. */
11476 addend += 0x8000;
11477 break;
11478
11479 case R_PPC64_ADDR16_DS:
11480 case R_PPC64_ADDR16_LO_DS:
11481 case R_PPC64_GOT16_DS:
11482 case R_PPC64_GOT16_LO_DS:
11483 case R_PPC64_PLT16_LO_DS:
11484 case R_PPC64_SECTOFF_DS:
11485 case R_PPC64_SECTOFF_LO_DS:
11486 case R_PPC64_TOC16_DS:
11487 case R_PPC64_TOC16_LO_DS:
11488 case R_PPC64_PLTGOT16_DS:
11489 case R_PPC64_PLTGOT16_LO_DS:
11490 case R_PPC64_GOT_TPREL16_DS:
11491 case R_PPC64_GOT_TPREL16_LO_DS:
11492 case R_PPC64_GOT_DTPREL16_DS:
11493 case R_PPC64_GOT_DTPREL16_LO_DS:
11494 case R_PPC64_TPREL16_DS:
11495 case R_PPC64_TPREL16_LO_DS:
11496 case R_PPC64_DTPREL16_DS:
11497 case R_PPC64_DTPREL16_LO_DS:
11498 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
11499 mask = 3;
11500 /* If this reloc is against an lq insn, then the value must be
11501 a multiple of 16. This is somewhat of a hack, but the
11502 "correct" way to do this by defining _DQ forms of all the
11503 _DS relocs bloats all reloc switches in this file. It
11504 doesn't seem to make much sense to use any of these relocs
11505 in data, so testing the insn should be safe. */
11506 if ((insn & (0x3f << 26)) == (56u << 26))
11507 mask = 15;
11508 if (((relocation + addend) & mask) != 0)
11509 {
11510 (*_bfd_error_handler)
11511 (_("%B: error: relocation %s not a multiple of %d"),
11512 input_bfd,
11513 ppc64_elf_howto_table[r_type]->name,
11514 mask + 1);
11515 bfd_set_error (bfd_error_bad_value);
11516 ret = FALSE;
11517 continue;
11518 }
11519 break;
11520 }
11521
11522 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
11523 because such sections are not SEC_ALLOC and thus ld.so will
11524 not process them. */
11525 if (unresolved_reloc
11526 && !((input_section->flags & SEC_DEBUGGING) != 0
11527 && h->elf.def_dynamic))
11528 {
11529 (*_bfd_error_handler)
11530 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
11531 input_bfd,
11532 input_section,
11533 (long) rel->r_offset,
11534 ppc64_elf_howto_table[(int) r_type]->name,
11535 h->elf.root.root.string);
11536 ret = FALSE;
11537 }
11538
11539 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
11540 input_bfd,
11541 input_section,
11542 contents,
11543 rel->r_offset,
11544 relocation,
11545 addend);
11546
11547 if (r != bfd_reloc_ok)
11548 {
11549 if (sym_name == NULL)
11550 sym_name = "(null)";
11551 if (r == bfd_reloc_overflow)
11552 {
11553 if (warned)
11554 continue;
11555 if (h != NULL
11556 && h->elf.root.type == bfd_link_hash_undefweak
11557 && ppc64_elf_howto_table[r_type]->pc_relative)
11558 {
11559 /* Assume this is a call protected by other code that
11560 detects the symbol is undefined. If this is the case,
11561 we can safely ignore the overflow. If not, the
11562 program is hosed anyway, and a little warning isn't
11563 going to help. */
11564
11565 continue;
11566 }
11567
11568 if (!((*info->callbacks->reloc_overflow)
11569 (info, (h ? &h->elf.root : NULL), sym_name,
11570 ppc64_elf_howto_table[r_type]->name,
11571 orig_addend, input_bfd, input_section, rel->r_offset)))
11572 return FALSE;
11573 }
11574 else
11575 {
11576 (*_bfd_error_handler)
11577 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
11578 input_bfd,
11579 input_section,
11580 (long) rel->r_offset,
11581 ppc64_elf_howto_table[r_type]->name,
11582 sym_name,
11583 (int) r);
11584 ret = FALSE;
11585 }
11586 }
11587 }
11588
11589 /* If we're emitting relocations, then shortly after this function
11590 returns, reloc offsets and addends for this section will be
11591 adjusted. Worse, reloc symbol indices will be for the output
11592 file rather than the input. Save a copy of the relocs for
11593 opd_entry_value. */
11594 if (is_opd && (info->emitrelocations || info->relocatable))
11595 {
11596 bfd_size_type amt;
11597 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
11598 rel = bfd_alloc (input_bfd, amt);
11599 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
11600 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
11601 if (rel == NULL)
11602 return FALSE;
11603 memcpy (rel, relocs, amt);
11604 }
11605 return ret;
11606 }
11607
11608 /* Adjust the value of any local symbols in opd sections. */
11609
11610 static bfd_boolean
11611 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
11612 const char *name ATTRIBUTE_UNUSED,
11613 Elf_Internal_Sym *elfsym,
11614 asection *input_sec,
11615 struct elf_link_hash_entry *h)
11616 {
11617 struct _opd_sec_data *opd;
11618 long adjust;
11619 bfd_vma value;
11620
11621 if (h != NULL)
11622 return TRUE;
11623
11624 opd = get_opd_info (input_sec);
11625 if (opd == NULL || opd->adjust == NULL)
11626 return TRUE;
11627
11628 value = elfsym->st_value - input_sec->output_offset;
11629 if (!info->relocatable)
11630 value -= input_sec->output_section->vma;
11631
11632 adjust = opd->adjust[value / 8];
11633 if (adjust == -1)
11634 elfsym->st_value = 0;
11635 else
11636 elfsym->st_value += adjust;
11637 return TRUE;
11638 }
11639
11640 /* Finish up dynamic symbol handling. We set the contents of various
11641 dynamic sections here. */
11642
11643 static bfd_boolean
11644 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
11645 struct bfd_link_info *info,
11646 struct elf_link_hash_entry *h,
11647 Elf_Internal_Sym *sym)
11648 {
11649 struct ppc_link_hash_table *htab;
11650 struct plt_entry *ent;
11651 Elf_Internal_Rela rela;
11652 bfd_byte *loc;
11653
11654 htab = ppc_hash_table (info);
11655
11656 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
11657 if (ent->plt.offset != (bfd_vma) -1)
11658 {
11659 /* This symbol has an entry in the procedure linkage
11660 table. Set it up. */
11661
11662 if (htab->plt == NULL
11663 || htab->relplt == NULL
11664 || htab->glink == NULL)
11665 abort ();
11666
11667 /* Create a JMP_SLOT reloc to inform the dynamic linker to
11668 fill in the PLT entry. */
11669 rela.r_offset = (htab->plt->output_section->vma
11670 + htab->plt->output_offset
11671 + ent->plt.offset);
11672 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
11673 rela.r_addend = ent->addend;
11674
11675 loc = htab->relplt->contents;
11676 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
11677 * sizeof (Elf64_External_Rela));
11678 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11679 }
11680
11681 if (h->needs_copy)
11682 {
11683 Elf_Internal_Rela rela;
11684 bfd_byte *loc;
11685
11686 /* This symbol needs a copy reloc. Set it up. */
11687
11688 if (h->dynindx == -1
11689 || (h->root.type != bfd_link_hash_defined
11690 && h->root.type != bfd_link_hash_defweak)
11691 || htab->relbss == NULL)
11692 abort ();
11693
11694 rela.r_offset = (h->root.u.def.value
11695 + h->root.u.def.section->output_section->vma
11696 + h->root.u.def.section->output_offset);
11697 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
11698 rela.r_addend = 0;
11699 loc = htab->relbss->contents;
11700 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
11701 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
11702 }
11703
11704 /* Mark some specially defined symbols as absolute. */
11705 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
11706 sym->st_shndx = SHN_ABS;
11707
11708 return TRUE;
11709 }
11710
11711 /* Used to decide how to sort relocs in an optimal manner for the
11712 dynamic linker, before writing them out. */
11713
11714 static enum elf_reloc_type_class
11715 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
11716 {
11717 enum elf_ppc64_reloc_type r_type;
11718
11719 r_type = ELF64_R_TYPE (rela->r_info);
11720 switch (r_type)
11721 {
11722 case R_PPC64_RELATIVE:
11723 return reloc_class_relative;
11724 case R_PPC64_JMP_SLOT:
11725 return reloc_class_plt;
11726 case R_PPC64_COPY:
11727 return reloc_class_copy;
11728 default:
11729 return reloc_class_normal;
11730 }
11731 }
11732
11733 /* Finish up the dynamic sections. */
11734
11735 static bfd_boolean
11736 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
11737 struct bfd_link_info *info)
11738 {
11739 struct ppc_link_hash_table *htab;
11740 bfd *dynobj;
11741 asection *sdyn;
11742
11743 htab = ppc_hash_table (info);
11744 dynobj = htab->elf.dynobj;
11745 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
11746
11747 if (htab->elf.dynamic_sections_created)
11748 {
11749 Elf64_External_Dyn *dyncon, *dynconend;
11750
11751 if (sdyn == NULL || htab->got == NULL)
11752 abort ();
11753
11754 dyncon = (Elf64_External_Dyn *) sdyn->contents;
11755 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
11756 for (; dyncon < dynconend; dyncon++)
11757 {
11758 Elf_Internal_Dyn dyn;
11759 asection *s;
11760
11761 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
11762
11763 switch (dyn.d_tag)
11764 {
11765 default:
11766 continue;
11767
11768 case DT_PPC64_GLINK:
11769 s = htab->glink;
11770 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11771 /* We stupidly defined DT_PPC64_GLINK to be the start
11772 of glink rather than the first entry point, which is
11773 what ld.so needs, and now have a bigger stub to
11774 support automatic multiple TOCs. */
11775 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
11776 break;
11777
11778 case DT_PPC64_OPD:
11779 s = bfd_get_section_by_name (output_bfd, ".opd");
11780 if (s == NULL)
11781 continue;
11782 dyn.d_un.d_ptr = s->vma;
11783 break;
11784
11785 case DT_PPC64_OPDSZ:
11786 s = bfd_get_section_by_name (output_bfd, ".opd");
11787 if (s == NULL)
11788 continue;
11789 dyn.d_un.d_val = s->size;
11790 break;
11791
11792 case DT_PLTGOT:
11793 s = htab->plt;
11794 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11795 break;
11796
11797 case DT_JMPREL:
11798 s = htab->relplt;
11799 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11800 break;
11801
11802 case DT_PLTRELSZ:
11803 dyn.d_un.d_val = htab->relplt->size;
11804 break;
11805
11806 case DT_RELASZ:
11807 /* Don't count procedure linkage table relocs in the
11808 overall reloc count. */
11809 s = htab->relplt;
11810 if (s == NULL)
11811 continue;
11812 dyn.d_un.d_val -= s->size;
11813 break;
11814
11815 case DT_RELA:
11816 /* We may not be using the standard ELF linker script.
11817 If .rela.plt is the first .rela section, we adjust
11818 DT_RELA to not include it. */
11819 s = htab->relplt;
11820 if (s == NULL)
11821 continue;
11822 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
11823 continue;
11824 dyn.d_un.d_ptr += s->size;
11825 break;
11826 }
11827
11828 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
11829 }
11830 }
11831
11832 if (htab->got != NULL && htab->got->size != 0)
11833 {
11834 /* Fill in the first entry in the global offset table.
11835 We use it to hold the link-time TOCbase. */
11836 bfd_put_64 (output_bfd,
11837 elf_gp (output_bfd) + TOC_BASE_OFF,
11838 htab->got->contents);
11839
11840 /* Set .got entry size. */
11841 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
11842 }
11843
11844 if (htab->plt != NULL && htab->plt->size != 0)
11845 {
11846 /* Set .plt entry size. */
11847 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
11848 = PLT_ENTRY_SIZE;
11849 }
11850
11851 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
11852 brlt ourselves if emitrelocations. */
11853 if (htab->brlt != NULL
11854 && htab->brlt->reloc_count != 0
11855 && !_bfd_elf_link_output_relocs (output_bfd,
11856 htab->brlt,
11857 &elf_section_data (htab->brlt)->rel_hdr,
11858 elf_section_data (htab->brlt)->relocs,
11859 NULL))
11860 return FALSE;
11861
11862 if (htab->glink != NULL
11863 && htab->glink->reloc_count != 0
11864 && !_bfd_elf_link_output_relocs (output_bfd,
11865 htab->glink,
11866 &elf_section_data (htab->glink)->rel_hdr,
11867 elf_section_data (htab->glink)->relocs,
11868 NULL))
11869 return FALSE;
11870
11871 /* We need to handle writing out multiple GOT sections ourselves,
11872 since we didn't add them to DYNOBJ. We know dynobj is the first
11873 bfd. */
11874 while ((dynobj = dynobj->link_next) != NULL)
11875 {
11876 asection *s;
11877
11878 if (!is_ppc64_elf (dynobj))
11879 continue;
11880
11881 s = ppc64_elf_tdata (dynobj)->got;
11882 if (s != NULL
11883 && s->size != 0
11884 && s->output_section != bfd_abs_section_ptr
11885 && !bfd_set_section_contents (output_bfd, s->output_section,
11886 s->contents, s->output_offset,
11887 s->size))
11888 return FALSE;
11889 s = ppc64_elf_tdata (dynobj)->relgot;
11890 if (s != NULL
11891 && s->size != 0
11892 && s->output_section != bfd_abs_section_ptr
11893 && !bfd_set_section_contents (output_bfd, s->output_section,
11894 s->contents, s->output_offset,
11895 s->size))
11896 return FALSE;
11897 }
11898
11899 return TRUE;
11900 }
11901
11902 #include "elf64-target.h"
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