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[deliverable/binutils-gdb.git] / bfd / elf64-ppc.c
1 /* PowerPC64-specific support for 64-bit ELF.
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009, 2010, 2011 Free Software Foundation, Inc.
4 Written by Linus Nordberg, Swox AB <info@swox.com>,
5 based on elf32-ppc.c by Ian Lance Taylor.
6 Largely rewritten by Alan Modra.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License along
21 with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23
24
25 /* The 64-bit PowerPC ELF ABI may be found at
26 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and
27 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc64.h"
36 #include "elf64-ppc.h"
37 #include "dwarf2.h"
38
39 static bfd_reloc_status_type ppc64_elf_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc64_elf_branch_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc64_elf_brtaken_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type ppc64_elf_sectoff_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type ppc64_elf_toc_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc64_elf_toc64_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type ppc64_elf_unhandled_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_vma opd_entry_value
58 (asection *, bfd_vma, asection **, bfd_vma *);
59
60 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
61 #define TARGET_LITTLE_NAME "elf64-powerpcle"
62 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec
63 #define TARGET_BIG_NAME "elf64-powerpc"
64 #define ELF_ARCH bfd_arch_powerpc
65 #define ELF_TARGET_ID PPC64_ELF_DATA
66 #define ELF_MACHINE_CODE EM_PPC64
67 #define ELF_MAXPAGESIZE 0x10000
68 #define ELF_COMMONPAGESIZE 0x1000
69 #define elf_info_to_howto ppc64_elf_info_to_howto
70
71 #define elf_backend_want_got_sym 0
72 #define elf_backend_want_plt_sym 0
73 #define elf_backend_plt_alignment 3
74 #define elf_backend_plt_not_loaded 1
75 #define elf_backend_got_header_size 8
76 #define elf_backend_can_gc_sections 1
77 #define elf_backend_can_refcount 1
78 #define elf_backend_rela_normal 1
79 #define elf_backend_default_execstack 0
80
81 #define bfd_elf64_mkobject ppc64_elf_mkobject
82 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
83 #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
84 #define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
85 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
86 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
87 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
88 #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab
89 #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms
90
91 #define elf_backend_object_p ppc64_elf_object_p
92 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus
93 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo
94 #define elf_backend_write_core_note ppc64_elf_write_core_note
95 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
96 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
97 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook
98 #define elf_backend_check_directives ppc64_elf_process_dot_syms
99 #define elf_backend_as_needed_cleanup ppc64_elf_as_needed_cleanup
100 #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup
101 #define elf_backend_check_relocs ppc64_elf_check_relocs
102 #define elf_backend_gc_keep ppc64_elf_gc_keep
103 #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref
104 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
105 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
106 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
107 #define elf_backend_hide_symbol ppc64_elf_hide_symbol
108 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
109 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
110 #define elf_backend_init_index_section _bfd_elf_init_2_index_sections
111 #define elf_backend_action_discarded ppc64_elf_action_discarded
112 #define elf_backend_relocate_section ppc64_elf_relocate_section
113 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
114 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
115 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
116 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook
117 #define elf_backend_special_sections ppc64_elf_special_sections
118 #define elf_backend_post_process_headers _bfd_elf_set_osabi
119
120 /* The name of the dynamic interpreter. This is put in the .interp
121 section. */
122 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
123
124 /* The size in bytes of an entry in the procedure linkage table. */
125 #define PLT_ENTRY_SIZE 24
126
127 /* The initial size of the plt reserved for the dynamic linker. */
128 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
129
130 /* TOC base pointers offset from start of TOC. */
131 #define TOC_BASE_OFF 0x8000
132
133 /* Offset of tp and dtp pointers from start of TLS block. */
134 #define TP_OFFSET 0x7000
135 #define DTP_OFFSET 0x8000
136
137 /* .plt call stub instructions. The normal stub is like this, but
138 sometimes the .plt entry crosses a 64k boundary and we need to
139 insert an addi to adjust r12. */
140 #define PLT_CALL_STUB_SIZE (7*4)
141 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
142 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
143 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
144 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
145 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
146 /* ld %r11,xxx+16@l(%r12) */
147 #define BCTR 0x4e800420 /* bctr */
148
149
150 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,off@ha */
151 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */
152 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */
153 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */
154
155 #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */
156 #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */
157
158 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
159
160 /* glink call stub instructions. We enter with the index in R0. */
161 #define GLINK_CALL_STUB_SIZE (16*4)
162 /* 0: */
163 /* .quad plt0-1f */
164 /* __glink: */
165 #define MFLR_R12 0x7d8802a6 /* mflr %12 */
166 #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */
167 /* 1: */
168 #define MFLR_R11 0x7d6802a6 /* mflr %11 */
169 #define LD_R2_M16R11 0xe84bfff0 /* ld %2,(0b-1b)(%11) */
170 #define MTLR_R12 0x7d8803a6 /* mtlr %12 */
171 #define ADD_R12_R2_R11 0x7d825a14 /* add %12,%2,%11 */
172 /* ld %11,0(%12) */
173 /* ld %2,8(%12) */
174 /* mtctr %11 */
175 /* ld %11,16(%12) */
176 /* bctr */
177
178 /* Pad with this. */
179 #define NOP 0x60000000
180
181 /* Some other nops. */
182 #define CROR_151515 0x4def7b82
183 #define CROR_313131 0x4ffffb82
184
185 /* .glink entries for the first 32k functions are two instructions. */
186 #define LI_R0_0 0x38000000 /* li %r0,0 */
187 #define B_DOT 0x48000000 /* b . */
188
189 /* After that, we need two instructions to load the index, followed by
190 a branch. */
191 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */
192 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
193
194 /* Instructions used by the save and restore reg functions. */
195 #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */
196 #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */
197 #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */
198 #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */
199 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
200 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
201 #define LI_R12_0 0x39800000 /* li %r12,0 */
202 #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */
203 #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */
204 #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */
205 #define BLR 0x4e800020 /* blr */
206
207 /* Since .opd is an array of descriptors and each entry will end up
208 with identical R_PPC64_RELATIVE relocs, there is really no need to
209 propagate .opd relocs; The dynamic linker should be taught to
210 relocate .opd without reloc entries. */
211 #ifndef NO_OPD_RELOCS
212 #define NO_OPD_RELOCS 0
213 #endif
214 \f
215 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
216
217 /* Relocation HOWTO's. */
218 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max];
219
220 static reloc_howto_type ppc64_elf_howto_raw[] = {
221 /* This reloc does nothing. */
222 HOWTO (R_PPC64_NONE, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 32, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC64_NONE", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 32 bit relocation. */
237 HOWTO (R_PPC64_ADDR32, /* type */
238 0, /* rightshift */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
240 32, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC64_ADDR32", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffffffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* An absolute 26 bit branch; the lower two bits must be zero.
252 FIXME: we don't check that, we just clear them. */
253 HOWTO (R_PPC64_ADDR24, /* type */
254 0, /* rightshift */
255 2, /* size (0 = byte, 1 = short, 2 = long) */
256 26, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_bitfield, /* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_PPC64_ADDR24", /* name */
262 FALSE, /* partial_inplace */
263 0, /* src_mask */
264 0x03fffffc, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* A standard 16 bit relocation. */
268 HOWTO (R_PPC64_ADDR16, /* type */
269 0, /* rightshift */
270 1, /* size (0 = byte, 1 = short, 2 = long) */
271 16, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_bitfield, /* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_PPC64_ADDR16", /* name */
277 FALSE, /* partial_inplace */
278 0, /* src_mask */
279 0xffff, /* dst_mask */
280 FALSE), /* pcrel_offset */
281
282 /* A 16 bit relocation without overflow. */
283 HOWTO (R_PPC64_ADDR16_LO, /* type */
284 0, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_PPC64_ADDR16_LO", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* Bits 16-31 of an address. */
298 HOWTO (R_PPC64_ADDR16_HI, /* type */
299 16, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_dont, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_PPC64_ADDR16_HI", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 /* Bits 16-31 of an address, plus 1 if the contents of the low 16
313 bits, treated as a signed number, is negative. */
314 HOWTO (R_PPC64_ADDR16_HA, /* type */
315 16, /* rightshift */
316 1, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_dont, /* complain_on_overflow */
321 ppc64_elf_ha_reloc, /* special_function */
322 "R_PPC64_ADDR16_HA", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0xffff, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* An absolute 16 bit branch; the lower two bits must be zero.
329 FIXME: we don't check that, we just clear them. */
330 HOWTO (R_PPC64_ADDR14, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 ppc64_elf_branch_reloc, /* special_function */
338 "R_PPC64_ADDR14", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0x0000fffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* An absolute 16 bit branch, for which bit 10 should be set to
345 indicate that the branch is expected to be taken. The lower two
346 bits must be zero. */
347 HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 16, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 ppc64_elf_brtaken_reloc, /* special_function */
355 "R_PPC64_ADDR14_BRTAKEN",/* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x0000fffc, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* An absolute 16 bit branch, for which bit 10 should be set to
362 indicate that the branch is not expected to be taken. The lower
363 two bits must be zero. */
364 HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
365 0, /* rightshift */
366 2, /* size (0 = byte, 1 = short, 2 = long) */
367 16, /* bitsize */
368 FALSE, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_bitfield, /* complain_on_overflow */
371 ppc64_elf_brtaken_reloc, /* special_function */
372 "R_PPC64_ADDR14_BRNTAKEN",/* name */
373 FALSE, /* partial_inplace */
374 0, /* src_mask */
375 0x0000fffc, /* dst_mask */
376 FALSE), /* pcrel_offset */
377
378 /* A relative 26 bit branch; the lower two bits must be zero. */
379 HOWTO (R_PPC64_REL24, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 26, /* bitsize */
383 TRUE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_signed, /* complain_on_overflow */
386 ppc64_elf_branch_reloc, /* special_function */
387 "R_PPC64_REL24", /* name */
388 FALSE, /* partial_inplace */
389 0, /* src_mask */
390 0x03fffffc, /* dst_mask */
391 TRUE), /* pcrel_offset */
392
393 /* A relative 16 bit branch; the lower two bits must be zero. */
394 HOWTO (R_PPC64_REL14, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 ppc64_elf_branch_reloc, /* special_function */
402 "R_PPC64_REL14", /* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0x0000fffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* A relative 16 bit branch. Bit 10 should be set to indicate that
409 the branch is expected to be taken. The lower two bits must be
410 zero. */
411 HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
412 0, /* rightshift */
413 2, /* size (0 = byte, 1 = short, 2 = long) */
414 16, /* bitsize */
415 TRUE, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_signed, /* complain_on_overflow */
418 ppc64_elf_brtaken_reloc, /* special_function */
419 "R_PPC64_REL14_BRTAKEN", /* name */
420 FALSE, /* partial_inplace */
421 0, /* src_mask */
422 0x0000fffc, /* dst_mask */
423 TRUE), /* pcrel_offset */
424
425 /* A relative 16 bit branch. Bit 10 should be set to indicate that
426 the branch is not expected to be taken. The lower two bits must
427 be zero. */
428 HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
429 0, /* rightshift */
430 2, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 TRUE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_signed, /* complain_on_overflow */
435 ppc64_elf_brtaken_reloc, /* special_function */
436 "R_PPC64_REL14_BRNTAKEN",/* name */
437 FALSE, /* partial_inplace */
438 0, /* src_mask */
439 0x0000fffc, /* dst_mask */
440 TRUE), /* pcrel_offset */
441
442 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
443 symbol. */
444 HOWTO (R_PPC64_GOT16, /* type */
445 0, /* rightshift */
446 1, /* size (0 = byte, 1 = short, 2 = long) */
447 16, /* bitsize */
448 FALSE, /* pc_relative */
449 0, /* bitpos */
450 complain_overflow_signed, /* complain_on_overflow */
451 ppc64_elf_unhandled_reloc, /* special_function */
452 "R_PPC64_GOT16", /* name */
453 FALSE, /* partial_inplace */
454 0, /* src_mask */
455 0xffff, /* dst_mask */
456 FALSE), /* pcrel_offset */
457
458 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
459 the symbol. */
460 HOWTO (R_PPC64_GOT16_LO, /* type */
461 0, /* rightshift */
462 1, /* size (0 = byte, 1 = short, 2 = long) */
463 16, /* bitsize */
464 FALSE, /* pc_relative */
465 0, /* bitpos */
466 complain_overflow_dont, /* complain_on_overflow */
467 ppc64_elf_unhandled_reloc, /* special_function */
468 "R_PPC64_GOT16_LO", /* name */
469 FALSE, /* partial_inplace */
470 0, /* src_mask */
471 0xffff, /* dst_mask */
472 FALSE), /* pcrel_offset */
473
474 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
475 the symbol. */
476 HOWTO (R_PPC64_GOT16_HI, /* type */
477 16, /* rightshift */
478 1, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_dont,/* complain_on_overflow */
483 ppc64_elf_unhandled_reloc, /* special_function */
484 "R_PPC64_GOT16_HI", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xffff, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
491 the symbol. */
492 HOWTO (R_PPC64_GOT16_HA, /* type */
493 16, /* rightshift */
494 1, /* size (0 = byte, 1 = short, 2 = long) */
495 16, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont,/* complain_on_overflow */
499 ppc64_elf_unhandled_reloc, /* special_function */
500 "R_PPC64_GOT16_HA", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* This is used only by the dynamic linker. The symbol should exist
507 both in the object being run and in some shared library. The
508 dynamic linker copies the data addressed by the symbol from the
509 shared library into the object, because the object being
510 run has to have the data at some particular address. */
511 HOWTO (R_PPC64_COPY, /* type */
512 0, /* rightshift */
513 0, /* this one is variable size */
514 0, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_dont, /* complain_on_overflow */
518 ppc64_elf_unhandled_reloc, /* special_function */
519 "R_PPC64_COPY", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 0, /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Like R_PPC64_ADDR64, but used when setting global offset table
526 entries. */
527 HOWTO (R_PPC64_GLOB_DAT, /* type */
528 0, /* rightshift */
529 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
530 64, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 ppc64_elf_unhandled_reloc, /* special_function */
535 "R_PPC64_GLOB_DAT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 ONES (64), /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Created by the link editor. Marks a procedure linkage table
542 entry for a symbol. */
543 HOWTO (R_PPC64_JMP_SLOT, /* type */
544 0, /* rightshift */
545 0, /* size (0 = byte, 1 = short, 2 = long) */
546 0, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 ppc64_elf_unhandled_reloc, /* special_function */
551 "R_PPC64_JMP_SLOT", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 0, /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Used only by the dynamic linker. When the object is run, this
558 doubleword64 is set to the load address of the object, plus the
559 addend. */
560 HOWTO (R_PPC64_RELATIVE, /* type */
561 0, /* rightshift */
562 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
563 64, /* bitsize */
564 FALSE, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_dont, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_PPC64_RELATIVE", /* name */
569 FALSE, /* partial_inplace */
570 0, /* src_mask */
571 ONES (64), /* dst_mask */
572 FALSE), /* pcrel_offset */
573
574 /* Like R_PPC64_ADDR32, but may be unaligned. */
575 HOWTO (R_PPC64_UADDR32, /* type */
576 0, /* rightshift */
577 2, /* size (0 = byte, 1 = short, 2 = long) */
578 32, /* bitsize */
579 FALSE, /* pc_relative */
580 0, /* bitpos */
581 complain_overflow_bitfield, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC64_UADDR32", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 FALSE), /* pcrel_offset */
588
589 /* Like R_PPC64_ADDR16, but may be unaligned. */
590 HOWTO (R_PPC64_UADDR16, /* type */
591 0, /* rightshift */
592 1, /* size (0 = byte, 1 = short, 2 = long) */
593 16, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_bitfield, /* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_PPC64_UADDR16", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* 32-bit PC relative. */
605 HOWTO (R_PPC64_REL32, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 32, /* bitsize */
609 TRUE, /* pc_relative */
610 0, /* bitpos */
611 /* FIXME: Verify. Was complain_overflow_bitfield. */
612 complain_overflow_signed, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC64_REL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* 32-bit relocation to the symbol's procedure linkage table. */
621 HOWTO (R_PPC64_PLT32, /* type */
622 0, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 32, /* bitsize */
625 FALSE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_bitfield, /* complain_on_overflow */
628 ppc64_elf_unhandled_reloc, /* special_function */
629 "R_PPC64_PLT32", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0xffffffff, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
636 FIXME: R_PPC64_PLTREL32 not supported. */
637 HOWTO (R_PPC64_PLTREL32, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 32, /* bitsize */
641 TRUE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_signed, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC64_PLTREL32", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0xffffffff, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
652 the symbol. */
653 HOWTO (R_PPC64_PLT16_LO, /* type */
654 0, /* rightshift */
655 1, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 ppc64_elf_unhandled_reloc, /* special_function */
661 "R_PPC64_PLT16_LO", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0xffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
668 the symbol. */
669 HOWTO (R_PPC64_PLT16_HI, /* type */
670 16, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_dont, /* complain_on_overflow */
676 ppc64_elf_unhandled_reloc, /* special_function */
677 "R_PPC64_PLT16_HI", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
684 the symbol. */
685 HOWTO (R_PPC64_PLT16_HA, /* type */
686 16, /* rightshift */
687 1, /* size (0 = byte, 1 = short, 2 = long) */
688 16, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_dont, /* complain_on_overflow */
692 ppc64_elf_unhandled_reloc, /* special_function */
693 "R_PPC64_PLT16_HA", /* name */
694 FALSE, /* partial_inplace */
695 0, /* src_mask */
696 0xffff, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 /* 16-bit section relative relocation. */
700 HOWTO (R_PPC64_SECTOFF, /* type */
701 0, /* rightshift */
702 1, /* size (0 = byte, 1 = short, 2 = long) */
703 16, /* bitsize */
704 FALSE, /* pc_relative */
705 0, /* bitpos */
706 complain_overflow_bitfield, /* complain_on_overflow */
707 ppc64_elf_sectoff_reloc, /* special_function */
708 "R_PPC64_SECTOFF", /* name */
709 FALSE, /* partial_inplace */
710 0, /* src_mask */
711 0xffff, /* dst_mask */
712 FALSE), /* pcrel_offset */
713
714 /* Like R_PPC64_SECTOFF, but no overflow warning. */
715 HOWTO (R_PPC64_SECTOFF_LO, /* type */
716 0, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 16, /* bitsize */
719 FALSE, /* pc_relative */
720 0, /* bitpos */
721 complain_overflow_dont, /* complain_on_overflow */
722 ppc64_elf_sectoff_reloc, /* special_function */
723 "R_PPC64_SECTOFF_LO", /* name */
724 FALSE, /* partial_inplace */
725 0, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
728
729 /* 16-bit upper half section relative relocation. */
730 HOWTO (R_PPC64_SECTOFF_HI, /* type */
731 16, /* rightshift */
732 1, /* size (0 = byte, 1 = short, 2 = long) */
733 16, /* bitsize */
734 FALSE, /* pc_relative */
735 0, /* bitpos */
736 complain_overflow_dont, /* complain_on_overflow */
737 ppc64_elf_sectoff_reloc, /* special_function */
738 "R_PPC64_SECTOFF_HI", /* name */
739 FALSE, /* partial_inplace */
740 0, /* src_mask */
741 0xffff, /* dst_mask */
742 FALSE), /* pcrel_offset */
743
744 /* 16-bit upper half adjusted section relative relocation. */
745 HOWTO (R_PPC64_SECTOFF_HA, /* type */
746 16, /* rightshift */
747 1, /* size (0 = byte, 1 = short, 2 = long) */
748 16, /* bitsize */
749 FALSE, /* pc_relative */
750 0, /* bitpos */
751 complain_overflow_dont, /* complain_on_overflow */
752 ppc64_elf_sectoff_ha_reloc, /* special_function */
753 "R_PPC64_SECTOFF_HA", /* name */
754 FALSE, /* partial_inplace */
755 0, /* src_mask */
756 0xffff, /* dst_mask */
757 FALSE), /* pcrel_offset */
758
759 /* Like R_PPC64_REL24 without touching the two least significant bits. */
760 HOWTO (R_PPC64_REL30, /* type */
761 2, /* rightshift */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
763 30, /* bitsize */
764 TRUE, /* pc_relative */
765 0, /* bitpos */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 "R_PPC64_REL30", /* name */
769 FALSE, /* partial_inplace */
770 0, /* src_mask */
771 0xfffffffc, /* dst_mask */
772 TRUE), /* pcrel_offset */
773
774 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
775
776 /* A standard 64-bit relocation. */
777 HOWTO (R_PPC64_ADDR64, /* type */
778 0, /* rightshift */
779 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
780 64, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC64_ADDR64", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 ONES (64), /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 /* The bits 32-47 of an address. */
792 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
793 32, /* rightshift */
794 1, /* size (0 = byte, 1 = short, 2 = long) */
795 16, /* bitsize */
796 FALSE, /* pc_relative */
797 0, /* bitpos */
798 complain_overflow_dont, /* complain_on_overflow */
799 bfd_elf_generic_reloc, /* special_function */
800 "R_PPC64_ADDR16_HIGHER", /* name */
801 FALSE, /* partial_inplace */
802 0, /* src_mask */
803 0xffff, /* dst_mask */
804 FALSE), /* pcrel_offset */
805
806 /* The bits 32-47 of an address, plus 1 if the contents of the low
807 16 bits, treated as a signed number, is negative. */
808 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
809 32, /* rightshift */
810 1, /* size (0 = byte, 1 = short, 2 = long) */
811 16, /* bitsize */
812 FALSE, /* pc_relative */
813 0, /* bitpos */
814 complain_overflow_dont, /* complain_on_overflow */
815 ppc64_elf_ha_reloc, /* special_function */
816 "R_PPC64_ADDR16_HIGHERA", /* name */
817 FALSE, /* partial_inplace */
818 0, /* src_mask */
819 0xffff, /* dst_mask */
820 FALSE), /* pcrel_offset */
821
822 /* The bits 48-63 of an address. */
823 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
824 48, /* rightshift */
825 1, /* size (0 = byte, 1 = short, 2 = long) */
826 16, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 bfd_elf_generic_reloc, /* special_function */
831 "R_PPC64_ADDR16_HIGHEST", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 0xffff, /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* The bits 48-63 of an address, plus 1 if the contents of the low
838 16 bits, treated as a signed number, is negative. */
839 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
840 48, /* rightshift */
841 1, /* size (0 = byte, 1 = short, 2 = long) */
842 16, /* bitsize */
843 FALSE, /* pc_relative */
844 0, /* bitpos */
845 complain_overflow_dont, /* complain_on_overflow */
846 ppc64_elf_ha_reloc, /* special_function */
847 "R_PPC64_ADDR16_HIGHESTA", /* name */
848 FALSE, /* partial_inplace */
849 0, /* src_mask */
850 0xffff, /* dst_mask */
851 FALSE), /* pcrel_offset */
852
853 /* Like ADDR64, but may be unaligned. */
854 HOWTO (R_PPC64_UADDR64, /* type */
855 0, /* rightshift */
856 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
857 64, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_dont, /* complain_on_overflow */
861 bfd_elf_generic_reloc, /* special_function */
862 "R_PPC64_UADDR64", /* name */
863 FALSE, /* partial_inplace */
864 0, /* src_mask */
865 ONES (64), /* dst_mask */
866 FALSE), /* pcrel_offset */
867
868 /* 64-bit relative relocation. */
869 HOWTO (R_PPC64_REL64, /* type */
870 0, /* rightshift */
871 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
872 64, /* bitsize */
873 TRUE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_PPC64_REL64", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 ONES (64), /* dst_mask */
881 TRUE), /* pcrel_offset */
882
883 /* 64-bit relocation to the symbol's procedure linkage table. */
884 HOWTO (R_PPC64_PLT64, /* type */
885 0, /* rightshift */
886 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
887 64, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_dont, /* complain_on_overflow */
891 ppc64_elf_unhandled_reloc, /* special_function */
892 "R_PPC64_PLT64", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 ONES (64), /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* 64-bit PC relative relocation to the symbol's procedure linkage
899 table. */
900 /* FIXME: R_PPC64_PLTREL64 not supported. */
901 HOWTO (R_PPC64_PLTREL64, /* type */
902 0, /* rightshift */
903 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
904 64, /* bitsize */
905 TRUE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_dont, /* complain_on_overflow */
908 ppc64_elf_unhandled_reloc, /* special_function */
909 "R_PPC64_PLTREL64", /* name */
910 FALSE, /* partial_inplace */
911 0, /* src_mask */
912 ONES (64), /* dst_mask */
913 TRUE), /* pcrel_offset */
914
915 /* 16 bit TOC-relative relocation. */
916
917 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */
918 HOWTO (R_PPC64_TOC16, /* type */
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_signed, /* complain_on_overflow */
925 ppc64_elf_toc_reloc, /* special_function */
926 "R_PPC64_TOC16", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* 16 bit TOC-relative relocation without overflow. */
933
934 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
935 HOWTO (R_PPC64_TOC16_LO, /* type */
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_dont, /* complain_on_overflow */
942 ppc64_elf_toc_reloc, /* special_function */
943 "R_PPC64_TOC16_LO", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* 16 bit TOC-relative relocation, high 16 bits. */
950
951 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
952 HOWTO (R_PPC64_TOC16_HI, /* type */
953 16, /* rightshift */
954 1, /* size (0 = byte, 1 = short, 2 = long) */
955 16, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc64_elf_toc_reloc, /* special_function */
960 "R_PPC64_TOC16_HI", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
967 contents of the low 16 bits, treated as a signed number, is
968 negative. */
969
970 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
971 HOWTO (R_PPC64_TOC16_HA, /* type */
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc64_elf_toc_ha_reloc, /* special_function */
979 "R_PPC64_TOC16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* 64-bit relocation; insert value of TOC base (.TOC.). */
986
987 /* R_PPC64_TOC 51 doubleword64 .TOC. */
988 HOWTO (R_PPC64_TOC, /* type */
989 0, /* rightshift */
990 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
991 64, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_bitfield, /* complain_on_overflow */
995 ppc64_elf_toc64_reloc, /* special_function */
996 "R_PPC64_TOC", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 ONES (64), /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like R_PPC64_GOT16, but also informs the link editor that the
1003 value to relocate may (!) refer to a PLT entry which the link
1004 editor (a) may replace with the symbol value. If the link editor
1005 is unable to fully resolve the symbol, it may (b) create a PLT
1006 entry and store the address to the new PLT entry in the GOT.
1007 This permits lazy resolution of function symbols at run time.
1008 The link editor may also skip all of this and just (c) emit a
1009 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
1010 /* FIXME: R_PPC64_PLTGOT16 not implemented. */
1011 HOWTO (R_PPC64_PLTGOT16, /* type */
1012 0, /* rightshift */
1013 1, /* size (0 = byte, 1 = short, 2 = long) */
1014 16, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_signed, /* complain_on_overflow */
1018 ppc64_elf_unhandled_reloc, /* special_function */
1019 "R_PPC64_PLTGOT16", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 0xffff, /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* Like R_PPC64_PLTGOT16, but without overflow. */
1026 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1027 HOWTO (R_PPC64_PLTGOT16_LO, /* type */
1028 0, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc64_elf_unhandled_reloc, /* special_function */
1035 "R_PPC64_PLTGOT16_LO", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
1042 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
1043 HOWTO (R_PPC64_PLTGOT16_HI, /* type */
1044 16, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc64_elf_unhandled_reloc, /* special_function */
1051 "R_PPC64_PLTGOT16_HI", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1058 1 if the contents of the low 16 bits, treated as a signed number,
1059 is negative. */
1060 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
1061 HOWTO (R_PPC64_PLTGOT16_HA, /* type */
1062 16, /* rightshift */
1063 1, /* size (0 = byte, 1 = short, 2 = long) */
1064 16, /* bitsize */
1065 FALSE, /* pc_relative */
1066 0, /* bitpos */
1067 complain_overflow_dont,/* complain_on_overflow */
1068 ppc64_elf_unhandled_reloc, /* special_function */
1069 "R_PPC64_PLTGOT16_HA", /* name */
1070 FALSE, /* partial_inplace */
1071 0, /* src_mask */
1072 0xffff, /* dst_mask */
1073 FALSE), /* pcrel_offset */
1074
1075 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */
1076 HOWTO (R_PPC64_ADDR16_DS, /* type */
1077 0, /* rightshift */
1078 1, /* size (0 = byte, 1 = short, 2 = long) */
1079 16, /* bitsize */
1080 FALSE, /* pc_relative */
1081 0, /* bitpos */
1082 complain_overflow_bitfield, /* complain_on_overflow */
1083 bfd_elf_generic_reloc, /* special_function */
1084 "R_PPC64_ADDR16_DS", /* name */
1085 FALSE, /* partial_inplace */
1086 0, /* src_mask */
1087 0xfffc, /* dst_mask */
1088 FALSE), /* pcrel_offset */
1089
1090 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
1091 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
1092 0, /* rightshift */
1093 1, /* size (0 = byte, 1 = short, 2 = long) */
1094 16, /* bitsize */
1095 FALSE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_dont,/* complain_on_overflow */
1098 bfd_elf_generic_reloc, /* special_function */
1099 "R_PPC64_ADDR16_LO_DS",/* name */
1100 FALSE, /* partial_inplace */
1101 0, /* src_mask */
1102 0xfffc, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1104
1105 /* Like R_PPC64_GOT16, but for instructions with a DS field. */
1106 HOWTO (R_PPC64_GOT16_DS, /* type */
1107 0, /* rightshift */
1108 1, /* size (0 = byte, 1 = short, 2 = long) */
1109 16, /* bitsize */
1110 FALSE, /* pc_relative */
1111 0, /* bitpos */
1112 complain_overflow_signed, /* complain_on_overflow */
1113 ppc64_elf_unhandled_reloc, /* special_function */
1114 "R_PPC64_GOT16_DS", /* name */
1115 FALSE, /* partial_inplace */
1116 0, /* src_mask */
1117 0xfffc, /* dst_mask */
1118 FALSE), /* pcrel_offset */
1119
1120 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
1121 HOWTO (R_PPC64_GOT16_LO_DS, /* type */
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_dont, /* complain_on_overflow */
1128 ppc64_elf_unhandled_reloc, /* special_function */
1129 "R_PPC64_GOT16_LO_DS", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xfffc, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
1136 HOWTO (R_PPC64_PLT16_LO_DS, /* type */
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc64_elf_unhandled_reloc, /* special_function */
1144 "R_PPC64_PLT16_LO_DS", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xfffc, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
1151 HOWTO (R_PPC64_SECTOFF_DS, /* type */
1152 0, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_bitfield, /* complain_on_overflow */
1158 ppc64_elf_sectoff_reloc, /* special_function */
1159 "R_PPC64_SECTOFF_DS", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xfffc, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
1166 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
1167 0, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc64_elf_sectoff_reloc, /* special_function */
1174 "R_PPC64_SECTOFF_LO_DS",/* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xfffc, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* Like R_PPC64_TOC16, but for instructions with a DS field. */
1181 HOWTO (R_PPC64_TOC16_DS, /* type */
1182 0, /* rightshift */
1183 1, /* size (0 = byte, 1 = short, 2 = long) */
1184 16, /* bitsize */
1185 FALSE, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_signed, /* complain_on_overflow */
1188 ppc64_elf_toc_reloc, /* special_function */
1189 "R_PPC64_TOC16_DS", /* name */
1190 FALSE, /* partial_inplace */
1191 0, /* src_mask */
1192 0xfffc, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1194
1195 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
1196 HOWTO (R_PPC64_TOC16_LO_DS, /* type */
1197 0, /* rightshift */
1198 1, /* size (0 = byte, 1 = short, 2 = long) */
1199 16, /* bitsize */
1200 FALSE, /* pc_relative */
1201 0, /* bitpos */
1202 complain_overflow_dont, /* complain_on_overflow */
1203 ppc64_elf_toc_reloc, /* special_function */
1204 "R_PPC64_TOC16_LO_DS", /* name */
1205 FALSE, /* partial_inplace */
1206 0, /* src_mask */
1207 0xfffc, /* dst_mask */
1208 FALSE), /* pcrel_offset */
1209
1210 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
1211 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
1212 HOWTO (R_PPC64_PLTGOT16_DS, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_signed, /* complain_on_overflow */
1219 ppc64_elf_unhandled_reloc, /* special_function */
1220 "R_PPC64_PLTGOT16_DS", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xfffc, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
1227 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
1228 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
1229 0, /* rightshift */
1230 1, /* size (0 = byte, 1 = short, 2 = long) */
1231 16, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 ppc64_elf_unhandled_reloc, /* special_function */
1236 "R_PPC64_PLTGOT16_LO_DS",/* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0xfffc, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* Marker relocs for TLS. */
1243 HOWTO (R_PPC64_TLS,
1244 0, /* rightshift */
1245 2, /* size (0 = byte, 1 = short, 2 = long) */
1246 32, /* bitsize */
1247 FALSE, /* pc_relative */
1248 0, /* bitpos */
1249 complain_overflow_dont, /* complain_on_overflow */
1250 bfd_elf_generic_reloc, /* special_function */
1251 "R_PPC64_TLS", /* name */
1252 FALSE, /* partial_inplace */
1253 0, /* src_mask */
1254 0, /* dst_mask */
1255 FALSE), /* pcrel_offset */
1256
1257 HOWTO (R_PPC64_TLSGD,
1258 0, /* rightshift */
1259 2, /* size (0 = byte, 1 = short, 2 = long) */
1260 32, /* bitsize */
1261 FALSE, /* pc_relative */
1262 0, /* bitpos */
1263 complain_overflow_dont, /* complain_on_overflow */
1264 bfd_elf_generic_reloc, /* special_function */
1265 "R_PPC64_TLSGD", /* name */
1266 FALSE, /* partial_inplace */
1267 0, /* src_mask */
1268 0, /* dst_mask */
1269 FALSE), /* pcrel_offset */
1270
1271 HOWTO (R_PPC64_TLSLD,
1272 0, /* rightshift */
1273 2, /* size (0 = byte, 1 = short, 2 = long) */
1274 32, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 bfd_elf_generic_reloc, /* special_function */
1279 "R_PPC64_TLSLD", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 0, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* Computes the load module index of the load module that contains the
1286 definition of its TLS sym. */
1287 HOWTO (R_PPC64_DTPMOD64,
1288 0, /* rightshift */
1289 4, /* size (0 = byte, 1 = short, 2 = long) */
1290 64, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
1293 complain_overflow_dont, /* complain_on_overflow */
1294 ppc64_elf_unhandled_reloc, /* special_function */
1295 "R_PPC64_DTPMOD64", /* name */
1296 FALSE, /* partial_inplace */
1297 0, /* src_mask */
1298 ONES (64), /* dst_mask */
1299 FALSE), /* pcrel_offset */
1300
1301 /* Computes a dtv-relative displacement, the difference between the value
1302 of sym+add and the base address of the thread-local storage block that
1303 contains the definition of sym, minus 0x8000. */
1304 HOWTO (R_PPC64_DTPREL64,
1305 0, /* rightshift */
1306 4, /* size (0 = byte, 1 = short, 2 = long) */
1307 64, /* bitsize */
1308 FALSE, /* pc_relative */
1309 0, /* bitpos */
1310 complain_overflow_dont, /* complain_on_overflow */
1311 ppc64_elf_unhandled_reloc, /* special_function */
1312 "R_PPC64_DTPREL64", /* name */
1313 FALSE, /* partial_inplace */
1314 0, /* src_mask */
1315 ONES (64), /* dst_mask */
1316 FALSE), /* pcrel_offset */
1317
1318 /* A 16 bit dtprel reloc. */
1319 HOWTO (R_PPC64_DTPREL16,
1320 0, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_signed, /* complain_on_overflow */
1326 ppc64_elf_unhandled_reloc, /* special_function */
1327 "R_PPC64_DTPREL16", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Like DTPREL16, but no overflow. */
1334 HOWTO (R_PPC64_DTPREL16_LO,
1335 0, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_dont, /* complain_on_overflow */
1341 ppc64_elf_unhandled_reloc, /* special_function */
1342 "R_PPC64_DTPREL16_LO", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* Like DTPREL16_LO, but next higher group of 16 bits. */
1349 HOWTO (R_PPC64_DTPREL16_HI,
1350 16, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 ppc64_elf_unhandled_reloc, /* special_function */
1357 "R_PPC64_DTPREL16_HI", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Like DTPREL16_HI, but adjust for low 16 bits. */
1364 HOWTO (R_PPC64_DTPREL16_HA,
1365 16, /* rightshift */
1366 1, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_dont, /* complain_on_overflow */
1371 ppc64_elf_unhandled_reloc, /* special_function */
1372 "R_PPC64_DTPREL16_HA", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Like DTPREL16_HI, but next higher group of 16 bits. */
1379 HOWTO (R_PPC64_DTPREL16_HIGHER,
1380 32, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 FALSE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_dont, /* complain_on_overflow */
1386 ppc64_elf_unhandled_reloc, /* special_function */
1387 "R_PPC64_DTPREL16_HIGHER", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */
1394 HOWTO (R_PPC64_DTPREL16_HIGHERA,
1395 32, /* rightshift */
1396 1, /* size (0 = byte, 1 = short, 2 = long) */
1397 16, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_dont, /* complain_on_overflow */
1401 ppc64_elf_unhandled_reloc, /* special_function */
1402 "R_PPC64_DTPREL16_HIGHERA", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */
1409 HOWTO (R_PPC64_DTPREL16_HIGHEST,
1410 48, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 FALSE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_dont, /* complain_on_overflow */
1416 ppc64_elf_unhandled_reloc, /* special_function */
1417 "R_PPC64_DTPREL16_HIGHEST", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 FALSE), /* pcrel_offset */
1422
1423 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */
1424 HOWTO (R_PPC64_DTPREL16_HIGHESTA,
1425 48, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 FALSE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_dont, /* complain_on_overflow */
1431 ppc64_elf_unhandled_reloc, /* special_function */
1432 "R_PPC64_DTPREL16_HIGHESTA", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 FALSE), /* pcrel_offset */
1437
1438 /* Like DTPREL16, but for insns with a DS field. */
1439 HOWTO (R_PPC64_DTPREL16_DS,
1440 0, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 FALSE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_signed, /* complain_on_overflow */
1446 ppc64_elf_unhandled_reloc, /* special_function */
1447 "R_PPC64_DTPREL16_DS", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xfffc, /* dst_mask */
1451 FALSE), /* pcrel_offset */
1452
1453 /* Like DTPREL16_DS, but no overflow. */
1454 HOWTO (R_PPC64_DTPREL16_LO_DS,
1455 0, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 FALSE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc64_elf_unhandled_reloc, /* special_function */
1462 "R_PPC64_DTPREL16_LO_DS", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xfffc, /* dst_mask */
1466 FALSE), /* pcrel_offset */
1467
1468 /* Computes a tp-relative displacement, the difference between the value of
1469 sym+add and the value of the thread pointer (r13). */
1470 HOWTO (R_PPC64_TPREL64,
1471 0, /* rightshift */
1472 4, /* size (0 = byte, 1 = short, 2 = long) */
1473 64, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 ppc64_elf_unhandled_reloc, /* special_function */
1478 "R_PPC64_TPREL64", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 ONES (64), /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* A 16 bit tprel reloc. */
1485 HOWTO (R_PPC64_TPREL16,
1486 0, /* rightshift */
1487 1, /* size (0 = byte, 1 = short, 2 = long) */
1488 16, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_signed, /* complain_on_overflow */
1492 ppc64_elf_unhandled_reloc, /* special_function */
1493 "R_PPC64_TPREL16", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0xffff, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Like TPREL16, but no overflow. */
1500 HOWTO (R_PPC64_TPREL16_LO,
1501 0, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_dont, /* complain_on_overflow */
1507 ppc64_elf_unhandled_reloc, /* special_function */
1508 "R_PPC64_TPREL16_LO", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513
1514 /* Like TPREL16_LO, but next higher group of 16 bits. */
1515 HOWTO (R_PPC64_TPREL16_HI,
1516 16, /* rightshift */
1517 1, /* size (0 = byte, 1 = short, 2 = long) */
1518 16, /* bitsize */
1519 FALSE, /* pc_relative */
1520 0, /* bitpos */
1521 complain_overflow_dont, /* complain_on_overflow */
1522 ppc64_elf_unhandled_reloc, /* special_function */
1523 "R_PPC64_TPREL16_HI", /* name */
1524 FALSE, /* partial_inplace */
1525 0, /* src_mask */
1526 0xffff, /* dst_mask */
1527 FALSE), /* pcrel_offset */
1528
1529 /* Like TPREL16_HI, but adjust for low 16 bits. */
1530 HOWTO (R_PPC64_TPREL16_HA,
1531 16, /* rightshift */
1532 1, /* size (0 = byte, 1 = short, 2 = long) */
1533 16, /* bitsize */
1534 FALSE, /* pc_relative */
1535 0, /* bitpos */
1536 complain_overflow_dont, /* complain_on_overflow */
1537 ppc64_elf_unhandled_reloc, /* special_function */
1538 "R_PPC64_TPREL16_HA", /* name */
1539 FALSE, /* partial_inplace */
1540 0, /* src_mask */
1541 0xffff, /* dst_mask */
1542 FALSE), /* pcrel_offset */
1543
1544 /* Like TPREL16_HI, but next higher group of 16 bits. */
1545 HOWTO (R_PPC64_TPREL16_HIGHER,
1546 32, /* rightshift */
1547 1, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_dont, /* complain_on_overflow */
1552 ppc64_elf_unhandled_reloc, /* special_function */
1553 "R_PPC64_TPREL16_HIGHER", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */
1560 HOWTO (R_PPC64_TPREL16_HIGHERA,
1561 32, /* rightshift */
1562 1, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc64_elf_unhandled_reloc, /* special_function */
1568 "R_PPC64_TPREL16_HIGHERA", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */
1575 HOWTO (R_PPC64_TPREL16_HIGHEST,
1576 48, /* rightshift */
1577 1, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc64_elf_unhandled_reloc, /* special_function */
1583 "R_PPC64_TPREL16_HIGHEST", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0xffff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */
1590 HOWTO (R_PPC64_TPREL16_HIGHESTA,
1591 48, /* rightshift */
1592 1, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_dont, /* complain_on_overflow */
1597 ppc64_elf_unhandled_reloc, /* special_function */
1598 "R_PPC64_TPREL16_HIGHESTA", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0xffff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Like TPREL16, but for insns with a DS field. */
1605 HOWTO (R_PPC64_TPREL16_DS,
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_TPREL16_DS", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0xfffc, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Like TPREL16_DS, but no overflow. */
1620 HOWTO (R_PPC64_TPREL16_LO_DS,
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_TPREL16_LO_DS", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0xfffc, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1635 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1636 to the first entry relative to the TOC base (r2). */
1637 HOWTO (R_PPC64_GOT_TLSGD16,
1638 0, /* rightshift */
1639 1, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 FALSE, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_signed, /* complain_on_overflow */
1644 ppc64_elf_unhandled_reloc, /* special_function */
1645 "R_PPC64_GOT_TLSGD16", /* name */
1646 FALSE, /* partial_inplace */
1647 0, /* src_mask */
1648 0xffff, /* dst_mask */
1649 FALSE), /* pcrel_offset */
1650
1651 /* Like GOT_TLSGD16, but no overflow. */
1652 HOWTO (R_PPC64_GOT_TLSGD16_LO,
1653 0, /* rightshift */
1654 1, /* size (0 = byte, 1 = short, 2 = long) */
1655 16, /* bitsize */
1656 FALSE, /* pc_relative */
1657 0, /* bitpos */
1658 complain_overflow_dont, /* complain_on_overflow */
1659 ppc64_elf_unhandled_reloc, /* special_function */
1660 "R_PPC64_GOT_TLSGD16_LO", /* name */
1661 FALSE, /* partial_inplace */
1662 0, /* src_mask */
1663 0xffff, /* dst_mask */
1664 FALSE), /* pcrel_offset */
1665
1666 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1667 HOWTO (R_PPC64_GOT_TLSGD16_HI,
1668 16, /* rightshift */
1669 1, /* size (0 = byte, 1 = short, 2 = long) */
1670 16, /* bitsize */
1671 FALSE, /* pc_relative */
1672 0, /* bitpos */
1673 complain_overflow_dont, /* complain_on_overflow */
1674 ppc64_elf_unhandled_reloc, /* special_function */
1675 "R_PPC64_GOT_TLSGD16_HI", /* name */
1676 FALSE, /* partial_inplace */
1677 0, /* src_mask */
1678 0xffff, /* dst_mask */
1679 FALSE), /* pcrel_offset */
1680
1681 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1682 HOWTO (R_PPC64_GOT_TLSGD16_HA,
1683 16, /* 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_TLSGD16_HA", /* name */
1691 FALSE, /* partial_inplace */
1692 0, /* src_mask */
1693 0xffff, /* dst_mask */
1694 FALSE), /* pcrel_offset */
1695
1696 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1697 with values (sym+add)@dtpmod and zero, and computes the offset to the
1698 first entry relative to the TOC base (r2). */
1699 HOWTO (R_PPC64_GOT_TLSLD16,
1700 0, /* rightshift */
1701 1, /* size (0 = byte, 1 = short, 2 = long) */
1702 16, /* bitsize */
1703 FALSE, /* pc_relative */
1704 0, /* bitpos */
1705 complain_overflow_signed, /* complain_on_overflow */
1706 ppc64_elf_unhandled_reloc, /* special_function */
1707 "R_PPC64_GOT_TLSLD16", /* name */
1708 FALSE, /* partial_inplace */
1709 0, /* src_mask */
1710 0xffff, /* dst_mask */
1711 FALSE), /* pcrel_offset */
1712
1713 /* Like GOT_TLSLD16, but no overflow. */
1714 HOWTO (R_PPC64_GOT_TLSLD16_LO,
1715 0, /* rightshift */
1716 1, /* size (0 = byte, 1 = short, 2 = long) */
1717 16, /* bitsize */
1718 FALSE, /* pc_relative */
1719 0, /* bitpos */
1720 complain_overflow_dont, /* complain_on_overflow */
1721 ppc64_elf_unhandled_reloc, /* special_function */
1722 "R_PPC64_GOT_TLSLD16_LO", /* name */
1723 FALSE, /* partial_inplace */
1724 0, /* src_mask */
1725 0xffff, /* dst_mask */
1726 FALSE), /* pcrel_offset */
1727
1728 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1729 HOWTO (R_PPC64_GOT_TLSLD16_HI,
1730 16, /* rightshift */
1731 1, /* size (0 = byte, 1 = short, 2 = long) */
1732 16, /* bitsize */
1733 FALSE, /* pc_relative */
1734 0, /* bitpos */
1735 complain_overflow_dont, /* complain_on_overflow */
1736 ppc64_elf_unhandled_reloc, /* special_function */
1737 "R_PPC64_GOT_TLSLD16_HI", /* name */
1738 FALSE, /* partial_inplace */
1739 0, /* src_mask */
1740 0xffff, /* dst_mask */
1741 FALSE), /* pcrel_offset */
1742
1743 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1744 HOWTO (R_PPC64_GOT_TLSLD16_HA,
1745 16, /* rightshift */
1746 1, /* size (0 = byte, 1 = short, 2 = long) */
1747 16, /* bitsize */
1748 FALSE, /* pc_relative */
1749 0, /* bitpos */
1750 complain_overflow_dont, /* complain_on_overflow */
1751 ppc64_elf_unhandled_reloc, /* special_function */
1752 "R_PPC64_GOT_TLSLD16_HA", /* name */
1753 FALSE, /* partial_inplace */
1754 0, /* src_mask */
1755 0xffff, /* dst_mask */
1756 FALSE), /* pcrel_offset */
1757
1758 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1759 the offset to the entry relative to the TOC base (r2). */
1760 HOWTO (R_PPC64_GOT_DTPREL16_DS,
1761 0, /* rightshift */
1762 1, /* size (0 = byte, 1 = short, 2 = long) */
1763 16, /* bitsize */
1764 FALSE, /* pc_relative */
1765 0, /* bitpos */
1766 complain_overflow_signed, /* complain_on_overflow */
1767 ppc64_elf_unhandled_reloc, /* special_function */
1768 "R_PPC64_GOT_DTPREL16_DS", /* name */
1769 FALSE, /* partial_inplace */
1770 0, /* src_mask */
1771 0xfffc, /* dst_mask */
1772 FALSE), /* pcrel_offset */
1773
1774 /* Like GOT_DTPREL16_DS, but no overflow. */
1775 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS,
1776 0, /* rightshift */
1777 1, /* size (0 = byte, 1 = short, 2 = long) */
1778 16, /* bitsize */
1779 FALSE, /* pc_relative */
1780 0, /* bitpos */
1781 complain_overflow_dont, /* complain_on_overflow */
1782 ppc64_elf_unhandled_reloc, /* special_function */
1783 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */
1784 FALSE, /* partial_inplace */
1785 0, /* src_mask */
1786 0xfffc, /* dst_mask */
1787 FALSE), /* pcrel_offset */
1788
1789 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */
1790 HOWTO (R_PPC64_GOT_DTPREL16_HI,
1791 16, /* rightshift */
1792 1, /* size (0 = byte, 1 = short, 2 = long) */
1793 16, /* bitsize */
1794 FALSE, /* pc_relative */
1795 0, /* bitpos */
1796 complain_overflow_dont, /* complain_on_overflow */
1797 ppc64_elf_unhandled_reloc, /* special_function */
1798 "R_PPC64_GOT_DTPREL16_HI", /* name */
1799 FALSE, /* partial_inplace */
1800 0, /* src_mask */
1801 0xffff, /* dst_mask */
1802 FALSE), /* pcrel_offset */
1803
1804 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1805 HOWTO (R_PPC64_GOT_DTPREL16_HA,
1806 16, /* rightshift */
1807 1, /* size (0 = byte, 1 = short, 2 = long) */
1808 16, /* bitsize */
1809 FALSE, /* pc_relative */
1810 0, /* bitpos */
1811 complain_overflow_dont, /* complain_on_overflow */
1812 ppc64_elf_unhandled_reloc, /* special_function */
1813 "R_PPC64_GOT_DTPREL16_HA", /* name */
1814 FALSE, /* partial_inplace */
1815 0, /* src_mask */
1816 0xffff, /* dst_mask */
1817 FALSE), /* pcrel_offset */
1818
1819 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1820 offset to the entry relative to the TOC base (r2). */
1821 HOWTO (R_PPC64_GOT_TPREL16_DS,
1822 0, /* rightshift */
1823 1, /* size (0 = byte, 1 = short, 2 = long) */
1824 16, /* bitsize */
1825 FALSE, /* pc_relative */
1826 0, /* bitpos */
1827 complain_overflow_signed, /* complain_on_overflow */
1828 ppc64_elf_unhandled_reloc, /* special_function */
1829 "R_PPC64_GOT_TPREL16_DS", /* name */
1830 FALSE, /* partial_inplace */
1831 0, /* src_mask */
1832 0xfffc, /* dst_mask */
1833 FALSE), /* pcrel_offset */
1834
1835 /* Like GOT_TPREL16_DS, but no overflow. */
1836 HOWTO (R_PPC64_GOT_TPREL16_LO_DS,
1837 0, /* rightshift */
1838 1, /* size (0 = byte, 1 = short, 2 = long) */
1839 16, /* bitsize */
1840 FALSE, /* pc_relative */
1841 0, /* bitpos */
1842 complain_overflow_dont, /* complain_on_overflow */
1843 ppc64_elf_unhandled_reloc, /* special_function */
1844 "R_PPC64_GOT_TPREL16_LO_DS", /* name */
1845 FALSE, /* partial_inplace */
1846 0, /* src_mask */
1847 0xfffc, /* dst_mask */
1848 FALSE), /* pcrel_offset */
1849
1850 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */
1851 HOWTO (R_PPC64_GOT_TPREL16_HI,
1852 16, /* rightshift */
1853 1, /* size (0 = byte, 1 = short, 2 = long) */
1854 16, /* bitsize */
1855 FALSE, /* pc_relative */
1856 0, /* bitpos */
1857 complain_overflow_dont, /* complain_on_overflow */
1858 ppc64_elf_unhandled_reloc, /* special_function */
1859 "R_PPC64_GOT_TPREL16_HI", /* name */
1860 FALSE, /* partial_inplace */
1861 0, /* src_mask */
1862 0xffff, /* dst_mask */
1863 FALSE), /* pcrel_offset */
1864
1865 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1866 HOWTO (R_PPC64_GOT_TPREL16_HA,
1867 16, /* rightshift */
1868 1, /* size (0 = byte, 1 = short, 2 = long) */
1869 16, /* bitsize */
1870 FALSE, /* pc_relative */
1871 0, /* bitpos */
1872 complain_overflow_dont, /* complain_on_overflow */
1873 ppc64_elf_unhandled_reloc, /* special_function */
1874 "R_PPC64_GOT_TPREL16_HA", /* name */
1875 FALSE, /* partial_inplace */
1876 0, /* src_mask */
1877 0xffff, /* dst_mask */
1878 FALSE), /* pcrel_offset */
1879
1880 HOWTO (R_PPC64_JMP_IREL, /* type */
1881 0, /* rightshift */
1882 0, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1883 0, /* bitsize */
1884 FALSE, /* pc_relative */
1885 0, /* bitpos */
1886 complain_overflow_dont, /* complain_on_overflow */
1887 ppc64_elf_unhandled_reloc, /* special_function */
1888 "R_PPC64_JMP_IREL", /* name */
1889 FALSE, /* partial_inplace */
1890 0, /* src_mask */
1891 0, /* dst_mask */
1892 FALSE), /* pcrel_offset */
1893
1894 HOWTO (R_PPC64_IRELATIVE, /* type */
1895 0, /* rightshift */
1896 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
1897 64, /* bitsize */
1898 FALSE, /* pc_relative */
1899 0, /* bitpos */
1900 complain_overflow_dont, /* complain_on_overflow */
1901 bfd_elf_generic_reloc, /* special_function */
1902 "R_PPC64_IRELATIVE", /* name */
1903 FALSE, /* partial_inplace */
1904 0, /* src_mask */
1905 ONES (64), /* dst_mask */
1906 FALSE), /* pcrel_offset */
1907
1908 /* A 16 bit relative relocation. */
1909 HOWTO (R_PPC64_REL16, /* type */
1910 0, /* rightshift */
1911 1, /* size (0 = byte, 1 = short, 2 = long) */
1912 16, /* bitsize */
1913 TRUE, /* pc_relative */
1914 0, /* bitpos */
1915 complain_overflow_bitfield, /* complain_on_overflow */
1916 bfd_elf_generic_reloc, /* special_function */
1917 "R_PPC64_REL16", /* name */
1918 FALSE, /* partial_inplace */
1919 0, /* src_mask */
1920 0xffff, /* dst_mask */
1921 TRUE), /* pcrel_offset */
1922
1923 /* A 16 bit relative relocation without overflow. */
1924 HOWTO (R_PPC64_REL16_LO, /* type */
1925 0, /* rightshift */
1926 1, /* size (0 = byte, 1 = short, 2 = long) */
1927 16, /* bitsize */
1928 TRUE, /* pc_relative */
1929 0, /* bitpos */
1930 complain_overflow_dont,/* complain_on_overflow */
1931 bfd_elf_generic_reloc, /* special_function */
1932 "R_PPC64_REL16_LO", /* name */
1933 FALSE, /* partial_inplace */
1934 0, /* src_mask */
1935 0xffff, /* dst_mask */
1936 TRUE), /* pcrel_offset */
1937
1938 /* The high order 16 bits of a relative address. */
1939 HOWTO (R_PPC64_REL16_HI, /* type */
1940 16, /* rightshift */
1941 1, /* size (0 = byte, 1 = short, 2 = long) */
1942 16, /* bitsize */
1943 TRUE, /* pc_relative */
1944 0, /* bitpos */
1945 complain_overflow_dont, /* complain_on_overflow */
1946 bfd_elf_generic_reloc, /* special_function */
1947 "R_PPC64_REL16_HI", /* name */
1948 FALSE, /* partial_inplace */
1949 0, /* src_mask */
1950 0xffff, /* dst_mask */
1951 TRUE), /* pcrel_offset */
1952
1953 /* The high order 16 bits of a relative address, plus 1 if the contents of
1954 the low 16 bits, treated as a signed number, is negative. */
1955 HOWTO (R_PPC64_REL16_HA, /* type */
1956 16, /* rightshift */
1957 1, /* size (0 = byte, 1 = short, 2 = long) */
1958 16, /* bitsize */
1959 TRUE, /* pc_relative */
1960 0, /* bitpos */
1961 complain_overflow_dont, /* complain_on_overflow */
1962 ppc64_elf_ha_reloc, /* special_function */
1963 "R_PPC64_REL16_HA", /* name */
1964 FALSE, /* partial_inplace */
1965 0, /* src_mask */
1966 0xffff, /* dst_mask */
1967 TRUE), /* pcrel_offset */
1968
1969 /* GNU extension to record C++ vtable hierarchy. */
1970 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
1971 0, /* rightshift */
1972 0, /* size (0 = byte, 1 = short, 2 = long) */
1973 0, /* bitsize */
1974 FALSE, /* pc_relative */
1975 0, /* bitpos */
1976 complain_overflow_dont, /* complain_on_overflow */
1977 NULL, /* special_function */
1978 "R_PPC64_GNU_VTINHERIT", /* name */
1979 FALSE, /* partial_inplace */
1980 0, /* src_mask */
1981 0, /* dst_mask */
1982 FALSE), /* pcrel_offset */
1983
1984 /* GNU extension to record C++ vtable member usage. */
1985 HOWTO (R_PPC64_GNU_VTENTRY, /* type */
1986 0, /* rightshift */
1987 0, /* size (0 = byte, 1 = short, 2 = long) */
1988 0, /* bitsize */
1989 FALSE, /* pc_relative */
1990 0, /* bitpos */
1991 complain_overflow_dont, /* complain_on_overflow */
1992 NULL, /* special_function */
1993 "R_PPC64_GNU_VTENTRY", /* name */
1994 FALSE, /* partial_inplace */
1995 0, /* src_mask */
1996 0, /* dst_mask */
1997 FALSE), /* pcrel_offset */
1998 };
1999
2000 \f
2001 /* Initialize the ppc64_elf_howto_table, so that linear accesses can
2002 be done. */
2003
2004 static void
2005 ppc_howto_init (void)
2006 {
2007 unsigned int i, type;
2008
2009 for (i = 0;
2010 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2011 i++)
2012 {
2013 type = ppc64_elf_howto_raw[i].type;
2014 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
2015 / sizeof (ppc64_elf_howto_table[0])));
2016 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
2017 }
2018 }
2019
2020 static reloc_howto_type *
2021 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2022 bfd_reloc_code_real_type code)
2023 {
2024 enum elf_ppc64_reloc_type r = R_PPC64_NONE;
2025
2026 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2027 /* Initialize howto table if needed. */
2028 ppc_howto_init ();
2029
2030 switch (code)
2031 {
2032 default:
2033 return NULL;
2034
2035 case BFD_RELOC_NONE: r = R_PPC64_NONE;
2036 break;
2037 case BFD_RELOC_32: r = R_PPC64_ADDR32;
2038 break;
2039 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24;
2040 break;
2041 case BFD_RELOC_16: r = R_PPC64_ADDR16;
2042 break;
2043 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO;
2044 break;
2045 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI;
2046 break;
2047 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA;
2048 break;
2049 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14;
2050 break;
2051 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN;
2052 break;
2053 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN;
2054 break;
2055 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24;
2056 break;
2057 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14;
2058 break;
2059 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN;
2060 break;
2061 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN;
2062 break;
2063 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16;
2064 break;
2065 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO;
2066 break;
2067 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI;
2068 break;
2069 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA;
2070 break;
2071 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY;
2072 break;
2073 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT;
2074 break;
2075 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32;
2076 break;
2077 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32;
2078 break;
2079 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32;
2080 break;
2081 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO;
2082 break;
2083 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI;
2084 break;
2085 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA;
2086 break;
2087 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF;
2088 break;
2089 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO;
2090 break;
2091 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI;
2092 break;
2093 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA;
2094 break;
2095 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64;
2096 break;
2097 case BFD_RELOC_64: r = R_PPC64_ADDR64;
2098 break;
2099 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER;
2100 break;
2101 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA;
2102 break;
2103 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST;
2104 break;
2105 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA;
2106 break;
2107 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64;
2108 break;
2109 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64;
2110 break;
2111 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64;
2112 break;
2113 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16;
2114 break;
2115 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO;
2116 break;
2117 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI;
2118 break;
2119 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA;
2120 break;
2121 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC;
2122 break;
2123 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16;
2124 break;
2125 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO;
2126 break;
2127 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI;
2128 break;
2129 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA;
2130 break;
2131 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS;
2132 break;
2133 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS;
2134 break;
2135 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS;
2136 break;
2137 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS;
2138 break;
2139 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS;
2140 break;
2141 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS;
2142 break;
2143 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS;
2144 break;
2145 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS;
2146 break;
2147 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS;
2148 break;
2149 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS;
2150 break;
2151 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS;
2152 break;
2153 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS;
2154 break;
2155 case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD;
2156 break;
2157 case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD;
2158 break;
2159 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64;
2160 break;
2161 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16;
2162 break;
2163 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO;
2164 break;
2165 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI;
2166 break;
2167 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA;
2168 break;
2169 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64;
2170 break;
2171 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16;
2172 break;
2173 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO;
2174 break;
2175 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI;
2176 break;
2177 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA;
2178 break;
2179 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64;
2180 break;
2181 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16;
2182 break;
2183 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO;
2184 break;
2185 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI;
2186 break;
2187 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA;
2188 break;
2189 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16;
2190 break;
2191 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO;
2192 break;
2193 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI;
2194 break;
2195 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA;
2196 break;
2197 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS;
2198 break;
2199 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS;
2200 break;
2201 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI;
2202 break;
2203 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA;
2204 break;
2205 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS;
2206 break;
2207 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS;
2208 break;
2209 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI;
2210 break;
2211 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA;
2212 break;
2213 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS;
2214 break;
2215 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS;
2216 break;
2217 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER;
2218 break;
2219 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA;
2220 break;
2221 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST;
2222 break;
2223 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA;
2224 break;
2225 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS;
2226 break;
2227 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS;
2228 break;
2229 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER;
2230 break;
2231 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA;
2232 break;
2233 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST;
2234 break;
2235 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA;
2236 break;
2237 case BFD_RELOC_16_PCREL: r = R_PPC64_REL16;
2238 break;
2239 case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO;
2240 break;
2241 case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI;
2242 break;
2243 case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA;
2244 break;
2245 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT;
2246 break;
2247 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY;
2248 break;
2249 }
2250
2251 return ppc64_elf_howto_table[r];
2252 };
2253
2254 static reloc_howto_type *
2255 ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2256 const char *r_name)
2257 {
2258 unsigned int i;
2259
2260 for (i = 0;
2261 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
2262 i++)
2263 if (ppc64_elf_howto_raw[i].name != NULL
2264 && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0)
2265 return &ppc64_elf_howto_raw[i];
2266
2267 return NULL;
2268 }
2269
2270 /* Set the howto pointer for a PowerPC ELF reloc. */
2271
2272 static void
2273 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
2274 Elf_Internal_Rela *dst)
2275 {
2276 unsigned int type;
2277
2278 /* Initialize howto table if needed. */
2279 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
2280 ppc_howto_init ();
2281
2282 type = ELF64_R_TYPE (dst->r_info);
2283 if (type >= (sizeof (ppc64_elf_howto_table)
2284 / sizeof (ppc64_elf_howto_table[0])))
2285 {
2286 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2287 abfd, (int) type);
2288 type = R_PPC64_NONE;
2289 }
2290 cache_ptr->howto = ppc64_elf_howto_table[type];
2291 }
2292
2293 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */
2294
2295 static bfd_reloc_status_type
2296 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2297 void *data, asection *input_section,
2298 bfd *output_bfd, char **error_message)
2299 {
2300 /* If this is a relocatable link (output_bfd test tells us), just
2301 call the generic function. Any adjustment will be done at final
2302 link time. */
2303 if (output_bfd != NULL)
2304 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2305 input_section, output_bfd, error_message);
2306
2307 /* Adjust the addend for sign extension of the low 16 bits.
2308 We won't actually be using the low 16 bits, so trashing them
2309 doesn't matter. */
2310 reloc_entry->addend += 0x8000;
2311 return bfd_reloc_continue;
2312 }
2313
2314 static bfd_reloc_status_type
2315 ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2316 void *data, asection *input_section,
2317 bfd *output_bfd, char **error_message)
2318 {
2319 if (output_bfd != NULL)
2320 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2321 input_section, output_bfd, error_message);
2322
2323 if (strcmp (symbol->section->name, ".opd") == 0
2324 && (symbol->section->owner->flags & DYNAMIC) == 0)
2325 {
2326 bfd_vma dest = opd_entry_value (symbol->section,
2327 symbol->value + reloc_entry->addend,
2328 NULL, NULL);
2329 if (dest != (bfd_vma) -1)
2330 reloc_entry->addend = dest - (symbol->value
2331 + symbol->section->output_section->vma
2332 + symbol->section->output_offset);
2333 }
2334 return bfd_reloc_continue;
2335 }
2336
2337 static bfd_reloc_status_type
2338 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2339 void *data, asection *input_section,
2340 bfd *output_bfd, char **error_message)
2341 {
2342 long insn;
2343 enum elf_ppc64_reloc_type r_type;
2344 bfd_size_type octets;
2345 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
2346 bfd_boolean is_power4 = FALSE;
2347
2348 /* If this is a relocatable link (output_bfd test tells us), just
2349 call the generic function. Any adjustment will be done at final
2350 link time. */
2351 if (output_bfd != NULL)
2352 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2353 input_section, output_bfd, error_message);
2354
2355 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2356 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2357 insn &= ~(0x01 << 21);
2358 r_type = reloc_entry->howto->type;
2359 if (r_type == R_PPC64_ADDR14_BRTAKEN
2360 || r_type == R_PPC64_REL14_BRTAKEN)
2361 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
2362
2363 if (is_power4)
2364 {
2365 /* Set 'a' bit. This is 0b00010 in BO field for branch
2366 on CR(BI) insns (BO == 001at or 011at), and 0b01000
2367 for branch on CTR insns (BO == 1a00t or 1a01t). */
2368 if ((insn & (0x14 << 21)) == (0x04 << 21))
2369 insn |= 0x02 << 21;
2370 else if ((insn & (0x14 << 21)) == (0x10 << 21))
2371 insn |= 0x08 << 21;
2372 else
2373 goto out;
2374 }
2375 else
2376 {
2377 bfd_vma target = 0;
2378 bfd_vma from;
2379
2380 if (!bfd_is_com_section (symbol->section))
2381 target = symbol->value;
2382 target += symbol->section->output_section->vma;
2383 target += symbol->section->output_offset;
2384 target += reloc_entry->addend;
2385
2386 from = (reloc_entry->address
2387 + input_section->output_offset
2388 + input_section->output_section->vma);
2389
2390 /* Invert 'y' bit if not the default. */
2391 if ((bfd_signed_vma) (target - from) < 0)
2392 insn ^= 0x01 << 21;
2393 }
2394 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2395 out:
2396 return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data,
2397 input_section, output_bfd, error_message);
2398 }
2399
2400 static bfd_reloc_status_type
2401 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2402 void *data, asection *input_section,
2403 bfd *output_bfd, char **error_message)
2404 {
2405 /* If this is a relocatable link (output_bfd test tells us), just
2406 call the generic function. Any adjustment will be done at final
2407 link time. */
2408 if (output_bfd != NULL)
2409 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2410 input_section, output_bfd, error_message);
2411
2412 /* Subtract the symbol section base address. */
2413 reloc_entry->addend -= symbol->section->output_section->vma;
2414 return bfd_reloc_continue;
2415 }
2416
2417 static bfd_reloc_status_type
2418 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2419 void *data, asection *input_section,
2420 bfd *output_bfd, char **error_message)
2421 {
2422 /* If this is a relocatable link (output_bfd test tells us), just
2423 call the generic function. Any adjustment will be done at final
2424 link time. */
2425 if (output_bfd != NULL)
2426 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2427 input_section, output_bfd, error_message);
2428
2429 /* Subtract the symbol section base address. */
2430 reloc_entry->addend -= symbol->section->output_section->vma;
2431
2432 /* Adjust the addend for sign extension of the low 16 bits. */
2433 reloc_entry->addend += 0x8000;
2434 return bfd_reloc_continue;
2435 }
2436
2437 static bfd_reloc_status_type
2438 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2439 void *data, asection *input_section,
2440 bfd *output_bfd, char **error_message)
2441 {
2442 bfd_vma TOCstart;
2443
2444 /* If this is a relocatable link (output_bfd test tells us), just
2445 call the generic function. Any adjustment will be done at final
2446 link time. */
2447 if (output_bfd != NULL)
2448 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2449 input_section, output_bfd, error_message);
2450
2451 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2452 if (TOCstart == 0)
2453 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2454
2455 /* Subtract the TOC base address. */
2456 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2457 return bfd_reloc_continue;
2458 }
2459
2460 static bfd_reloc_status_type
2461 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2462 void *data, asection *input_section,
2463 bfd *output_bfd, char **error_message)
2464 {
2465 bfd_vma TOCstart;
2466
2467 /* If this is a relocatable link (output_bfd test tells us), just
2468 call the generic function. Any adjustment will be done at final
2469 link time. */
2470 if (output_bfd != NULL)
2471 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2472 input_section, output_bfd, error_message);
2473
2474 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2475 if (TOCstart == 0)
2476 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2477
2478 /* Subtract the TOC base address. */
2479 reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
2480
2481 /* Adjust the addend for sign extension of the low 16 bits. */
2482 reloc_entry->addend += 0x8000;
2483 return bfd_reloc_continue;
2484 }
2485
2486 static bfd_reloc_status_type
2487 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2488 void *data, asection *input_section,
2489 bfd *output_bfd, char **error_message)
2490 {
2491 bfd_vma TOCstart;
2492 bfd_size_type octets;
2493
2494 /* If this is a relocatable link (output_bfd test tells us), just
2495 call the generic function. Any adjustment will be done at final
2496 link time. */
2497 if (output_bfd != NULL)
2498 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2499 input_section, output_bfd, error_message);
2500
2501 TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
2502 if (TOCstart == 0)
2503 TOCstart = ppc64_elf_toc (input_section->output_section->owner);
2504
2505 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2506 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
2507 return bfd_reloc_ok;
2508 }
2509
2510 static bfd_reloc_status_type
2511 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
2512 void *data, asection *input_section,
2513 bfd *output_bfd, char **error_message)
2514 {
2515 /* If this is a relocatable link (output_bfd test tells us), just
2516 call the generic function. Any adjustment will be done at final
2517 link time. */
2518 if (output_bfd != NULL)
2519 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2520 input_section, output_bfd, error_message);
2521
2522 if (error_message != NULL)
2523 {
2524 static char buf[60];
2525 sprintf (buf, "generic linker can't handle %s",
2526 reloc_entry->howto->name);
2527 *error_message = buf;
2528 }
2529 return bfd_reloc_dangerous;
2530 }
2531
2532 /* Track GOT entries needed for a given symbol. We might need more
2533 than one got entry per symbol. */
2534 struct got_entry
2535 {
2536 struct got_entry *next;
2537
2538 /* The symbol addend that we'll be placing in the GOT. */
2539 bfd_vma addend;
2540
2541 /* Unlike other ELF targets, we use separate GOT entries for the same
2542 symbol referenced from different input files. This is to support
2543 automatic multiple TOC/GOT sections, where the TOC base can vary
2544 from one input file to another. After partitioning into TOC groups
2545 we merge entries within the group.
2546
2547 Point to the BFD owning this GOT entry. */
2548 bfd *owner;
2549
2550 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD,
2551 TLS_TPREL or TLS_DTPREL for tls entries. */
2552 unsigned char tls_type;
2553
2554 /* Non-zero if got.ent points to real entry. */
2555 unsigned char is_indirect;
2556
2557 /* Reference count until size_dynamic_sections, GOT offset thereafter. */
2558 union
2559 {
2560 bfd_signed_vma refcount;
2561 bfd_vma offset;
2562 struct got_entry *ent;
2563 } got;
2564 };
2565
2566 /* The same for PLT. */
2567 struct plt_entry
2568 {
2569 struct plt_entry *next;
2570
2571 bfd_vma addend;
2572
2573 union
2574 {
2575 bfd_signed_vma refcount;
2576 bfd_vma offset;
2577 } plt;
2578 };
2579
2580 struct ppc64_elf_obj_tdata
2581 {
2582 struct elf_obj_tdata elf;
2583
2584 /* Shortcuts to dynamic linker sections. */
2585 asection *got;
2586 asection *relgot;
2587
2588 /* Used during garbage collection. We attach global symbols defined
2589 on removed .opd entries to this section so that the sym is removed. */
2590 asection *deleted_section;
2591
2592 /* TLS local dynamic got entry handling. Support for multiple GOT
2593 sections means we potentially need one of these for each input bfd. */
2594 struct got_entry tlsld_got;
2595
2596 /* A copy of relocs before they are modified for --emit-relocs. */
2597 Elf_Internal_Rela *opd_relocs;
2598
2599 /* Nonzero if this bfd has small toc/got relocs, ie. that expect
2600 the reloc to be in the range -32768 to 32767. */
2601 unsigned int has_small_toc_reloc;
2602 };
2603
2604 #define ppc64_elf_tdata(bfd) \
2605 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any)
2606
2607 #define ppc64_tlsld_got(bfd) \
2608 (&ppc64_elf_tdata (bfd)->tlsld_got)
2609
2610 #define is_ppc64_elf(bfd) \
2611 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2612 && elf_object_id (bfd) == PPC64_ELF_DATA)
2613
2614 /* Override the generic function because we store some extras. */
2615
2616 static bfd_boolean
2617 ppc64_elf_mkobject (bfd *abfd)
2618 {
2619 return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata),
2620 PPC64_ELF_DATA);
2621 }
2622
2623 /* Fix bad default arch selected for a 64 bit input bfd when the
2624 default is 32 bit. */
2625
2626 static bfd_boolean
2627 ppc64_elf_object_p (bfd *abfd)
2628 {
2629 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
2630 {
2631 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2632
2633 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
2634 {
2635 /* Relies on arch after 32 bit default being 64 bit default. */
2636 abfd->arch_info = abfd->arch_info->next;
2637 BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
2638 }
2639 }
2640 return TRUE;
2641 }
2642
2643 /* Support for core dump NOTE sections. */
2644
2645 static bfd_boolean
2646 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2647 {
2648 size_t offset, size;
2649
2650 if (note->descsz != 504)
2651 return FALSE;
2652
2653 /* pr_cursig */
2654 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2655
2656 /* pr_pid */
2657 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
2658
2659 /* pr_reg */
2660 offset = 112;
2661 size = 384;
2662
2663 /* Make a ".reg/999" section. */
2664 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2665 size, note->descpos + offset);
2666 }
2667
2668 static bfd_boolean
2669 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2670 {
2671 if (note->descsz != 136)
2672 return FALSE;
2673
2674 elf_tdata (abfd)->core_pid
2675 = bfd_get_32 (abfd, note->descdata + 24);
2676 elf_tdata (abfd)->core_program
2677 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
2678 elf_tdata (abfd)->core_command
2679 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
2680
2681 return TRUE;
2682 }
2683
2684 static char *
2685 ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type,
2686 ...)
2687 {
2688 switch (note_type)
2689 {
2690 default:
2691 return NULL;
2692
2693 case NT_PRPSINFO:
2694 {
2695 char data[136];
2696 va_list ap;
2697
2698 va_start (ap, note_type);
2699 memset (data, 0, 40);
2700 strncpy (data + 40, va_arg (ap, const char *), 16);
2701 strncpy (data + 56, va_arg (ap, const char *), 80);
2702 va_end (ap);
2703 return elfcore_write_note (abfd, buf, bufsiz,
2704 "CORE", note_type, data, sizeof (data));
2705 }
2706
2707 case NT_PRSTATUS:
2708 {
2709 char data[504];
2710 va_list ap;
2711 long pid;
2712 int cursig;
2713 const void *greg;
2714
2715 va_start (ap, note_type);
2716 memset (data, 0, 112);
2717 pid = va_arg (ap, long);
2718 bfd_put_32 (abfd, pid, data + 32);
2719 cursig = va_arg (ap, int);
2720 bfd_put_16 (abfd, cursig, data + 12);
2721 greg = va_arg (ap, const void *);
2722 memcpy (data + 112, greg, 384);
2723 memset (data + 496, 0, 8);
2724 va_end (ap);
2725 return elfcore_write_note (abfd, buf, bufsiz,
2726 "CORE", note_type, data, sizeof (data));
2727 }
2728 }
2729 }
2730
2731 /* Add extra PPC sections. */
2732
2733 static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
2734 {
2735 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 },
2736 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2737 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2738 { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2739 { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2740 { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2741 { NULL, 0, 0, 0, 0 }
2742 };
2743
2744 enum _ppc64_sec_type {
2745 sec_normal = 0,
2746 sec_opd = 1,
2747 sec_toc = 2
2748 };
2749
2750 struct _ppc64_elf_section_data
2751 {
2752 struct bfd_elf_section_data elf;
2753
2754 union
2755 {
2756 /* An array with one entry for each opd function descriptor. */
2757 struct _opd_sec_data
2758 {
2759 /* Points to the function code section for local opd entries. */
2760 asection **func_sec;
2761
2762 /* After editing .opd, adjust references to opd local syms. */
2763 long *adjust;
2764 } opd;
2765
2766 /* An array for toc sections, indexed by offset/8. */
2767 struct _toc_sec_data
2768 {
2769 /* Specifies the relocation symbol index used at a given toc offset. */
2770 unsigned *symndx;
2771
2772 /* And the relocation addend. */
2773 bfd_vma *add;
2774 } toc;
2775 } u;
2776
2777 enum _ppc64_sec_type sec_type:2;
2778
2779 /* Flag set when small branches are detected. Used to
2780 select suitable defaults for the stub group size. */
2781 unsigned int has_14bit_branch:1;
2782 };
2783
2784 #define ppc64_elf_section_data(sec) \
2785 ((struct _ppc64_elf_section_data *) elf_section_data (sec))
2786
2787 static bfd_boolean
2788 ppc64_elf_new_section_hook (bfd *abfd, asection *sec)
2789 {
2790 if (!sec->used_by_bfd)
2791 {
2792 struct _ppc64_elf_section_data *sdata;
2793 bfd_size_type amt = sizeof (*sdata);
2794
2795 sdata = bfd_zalloc (abfd, amt);
2796 if (sdata == NULL)
2797 return FALSE;
2798 sec->used_by_bfd = sdata;
2799 }
2800
2801 return _bfd_elf_new_section_hook (abfd, sec);
2802 }
2803
2804 static struct _opd_sec_data *
2805 get_opd_info (asection * sec)
2806 {
2807 if (sec != NULL
2808 && ppc64_elf_section_data (sec) != NULL
2809 && ppc64_elf_section_data (sec)->sec_type == sec_opd)
2810 return &ppc64_elf_section_data (sec)->u.opd;
2811 return NULL;
2812 }
2813 \f
2814 /* Parameters for the qsort hook. */
2815 static bfd_boolean synthetic_relocatable;
2816
2817 /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */
2818
2819 static int
2820 compare_symbols (const void *ap, const void *bp)
2821 {
2822 const asymbol *a = * (const asymbol **) ap;
2823 const asymbol *b = * (const asymbol **) bp;
2824
2825 /* Section symbols first. */
2826 if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM))
2827 return -1;
2828 if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM))
2829 return 1;
2830
2831 /* then .opd symbols. */
2832 if (strcmp (a->section->name, ".opd") == 0
2833 && strcmp (b->section->name, ".opd") != 0)
2834 return -1;
2835 if (strcmp (a->section->name, ".opd") != 0
2836 && strcmp (b->section->name, ".opd") == 0)
2837 return 1;
2838
2839 /* then other code symbols. */
2840 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2841 == (SEC_CODE | SEC_ALLOC)
2842 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2843 != (SEC_CODE | SEC_ALLOC))
2844 return -1;
2845
2846 if ((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2847 != (SEC_CODE | SEC_ALLOC)
2848 && (b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
2849 == (SEC_CODE | SEC_ALLOC))
2850 return 1;
2851
2852 if (synthetic_relocatable)
2853 {
2854 if (a->section->id < b->section->id)
2855 return -1;
2856
2857 if (a->section->id > b->section->id)
2858 return 1;
2859 }
2860
2861 if (a->value + a->section->vma < b->value + b->section->vma)
2862 return -1;
2863
2864 if (a->value + a->section->vma > b->value + b->section->vma)
2865 return 1;
2866
2867 /* For syms with the same value, prefer strong dynamic global function
2868 syms over other syms. */
2869 if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0)
2870 return -1;
2871
2872 if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0)
2873 return 1;
2874
2875 if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0)
2876 return -1;
2877
2878 if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0)
2879 return 1;
2880
2881 if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0)
2882 return -1;
2883
2884 if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0)
2885 return 1;
2886
2887 if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0)
2888 return -1;
2889
2890 if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0)
2891 return 1;
2892
2893 return 0;
2894 }
2895
2896 /* Search SYMS for a symbol of the given VALUE. */
2897
2898 static asymbol *
2899 sym_exists_at (asymbol **syms, long lo, long hi, int id, bfd_vma value)
2900 {
2901 long mid;
2902
2903 if (id == -1)
2904 {
2905 while (lo < hi)
2906 {
2907 mid = (lo + hi) >> 1;
2908 if (syms[mid]->value + syms[mid]->section->vma < value)
2909 lo = mid + 1;
2910 else if (syms[mid]->value + syms[mid]->section->vma > value)
2911 hi = mid;
2912 else
2913 return syms[mid];
2914 }
2915 }
2916 else
2917 {
2918 while (lo < hi)
2919 {
2920 mid = (lo + hi) >> 1;
2921 if (syms[mid]->section->id < id)
2922 lo = mid + 1;
2923 else if (syms[mid]->section->id > id)
2924 hi = mid;
2925 else if (syms[mid]->value < value)
2926 lo = mid + 1;
2927 else if (syms[mid]->value > value)
2928 hi = mid;
2929 else
2930 return syms[mid];
2931 }
2932 }
2933 return NULL;
2934 }
2935
2936 static bfd_boolean
2937 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2938 {
2939 bfd_vma vma = *(bfd_vma *) ptr;
2940 return ((section->flags & SEC_ALLOC) != 0
2941 && section->vma <= vma
2942 && vma < section->vma + section->size);
2943 }
2944
2945 /* Create synthetic symbols, effectively restoring "dot-symbol" function
2946 entry syms. Also generate @plt symbols for the glink branch table. */
2947
2948 static long
2949 ppc64_elf_get_synthetic_symtab (bfd *abfd,
2950 long static_count, asymbol **static_syms,
2951 long dyn_count, asymbol **dyn_syms,
2952 asymbol **ret)
2953 {
2954 asymbol *s;
2955 long i;
2956 long count;
2957 char *names;
2958 long symcount, codesecsym, codesecsymend, secsymend, opdsymend;
2959 asection *opd;
2960 bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0;
2961 asymbol **syms;
2962
2963 *ret = NULL;
2964
2965 opd = bfd_get_section_by_name (abfd, ".opd");
2966 if (opd == NULL)
2967 return 0;
2968
2969 symcount = static_count;
2970 if (!relocatable)
2971 symcount += dyn_count;
2972 if (symcount == 0)
2973 return 0;
2974
2975 syms = bfd_malloc ((symcount + 1) * sizeof (*syms));
2976 if (syms == NULL)
2977 return -1;
2978
2979 if (!relocatable && static_count != 0 && dyn_count != 0)
2980 {
2981 /* Use both symbol tables. */
2982 memcpy (syms, static_syms, static_count * sizeof (*syms));
2983 memcpy (syms + static_count, dyn_syms, (dyn_count + 1) * sizeof (*syms));
2984 }
2985 else if (!relocatable && static_count == 0)
2986 memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms));
2987 else
2988 memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms));
2989
2990 synthetic_relocatable = relocatable;
2991 qsort (syms, symcount, sizeof (*syms), compare_symbols);
2992
2993 if (!relocatable && symcount > 1)
2994 {
2995 long j;
2996 /* Trim duplicate syms, since we may have merged the normal and
2997 dynamic symbols. Actually, we only care about syms that have
2998 different values, so trim any with the same value. */
2999 for (i = 1, j = 1; i < symcount; ++i)
3000 if (syms[i - 1]->value + syms[i - 1]->section->vma
3001 != syms[i]->value + syms[i]->section->vma)
3002 syms[j++] = syms[i];
3003 symcount = j;
3004 }
3005
3006 i = 0;
3007 if (strcmp (syms[i]->section->name, ".opd") == 0)
3008 ++i;
3009 codesecsym = i;
3010
3011 for (; i < symcount; ++i)
3012 if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3013 != (SEC_CODE | SEC_ALLOC))
3014 || (syms[i]->flags & BSF_SECTION_SYM) == 0)
3015 break;
3016 codesecsymend = i;
3017
3018 for (; i < symcount; ++i)
3019 if ((syms[i]->flags & BSF_SECTION_SYM) == 0)
3020 break;
3021 secsymend = i;
3022
3023 for (; i < symcount; ++i)
3024 if (strcmp (syms[i]->section->name, ".opd") != 0)
3025 break;
3026 opdsymend = i;
3027
3028 for (; i < symcount; ++i)
3029 if ((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))
3030 != (SEC_CODE | SEC_ALLOC))
3031 break;
3032 symcount = i;
3033
3034 count = 0;
3035
3036 if (relocatable)
3037 {
3038 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3039 arelent *r;
3040 size_t size;
3041 long relcount;
3042
3043 if (opdsymend == secsymend)
3044 goto done;
3045
3046 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3047 relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0;
3048 if (relcount == 0)
3049 goto done;
3050
3051 if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE))
3052 {
3053 count = -1;
3054 goto done;
3055 }
3056
3057 size = 0;
3058 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3059 {
3060 asymbol *sym;
3061
3062 while (r < opd->relocation + relcount
3063 && r->address < syms[i]->value + opd->vma)
3064 ++r;
3065
3066 if (r == opd->relocation + relcount)
3067 break;
3068
3069 if (r->address != syms[i]->value + opd->vma)
3070 continue;
3071
3072 if (r->howto->type != R_PPC64_ADDR64)
3073 continue;
3074
3075 sym = *r->sym_ptr_ptr;
3076 if (!sym_exists_at (syms, opdsymend, symcount,
3077 sym->section->id, sym->value + r->addend))
3078 {
3079 ++count;
3080 size += sizeof (asymbol);
3081 size += strlen (syms[i]->name) + 2;
3082 }
3083 }
3084
3085 s = *ret = bfd_malloc (size);
3086 if (s == NULL)
3087 {
3088 count = -1;
3089 goto done;
3090 }
3091
3092 names = (char *) (s + count);
3093
3094 for (i = secsymend, r = opd->relocation; i < opdsymend; ++i)
3095 {
3096 asymbol *sym;
3097
3098 while (r < opd->relocation + relcount
3099 && r->address < syms[i]->value + opd->vma)
3100 ++r;
3101
3102 if (r == opd->relocation + relcount)
3103 break;
3104
3105 if (r->address != syms[i]->value + opd->vma)
3106 continue;
3107
3108 if (r->howto->type != R_PPC64_ADDR64)
3109 continue;
3110
3111 sym = *r->sym_ptr_ptr;
3112 if (!sym_exists_at (syms, opdsymend, symcount,
3113 sym->section->id, sym->value + r->addend))
3114 {
3115 size_t len;
3116
3117 *s = *syms[i];
3118 s->flags |= BSF_SYNTHETIC;
3119 s->section = sym->section;
3120 s->value = sym->value + r->addend;
3121 s->name = names;
3122 *names++ = '.';
3123 len = strlen (syms[i]->name);
3124 memcpy (names, syms[i]->name, len + 1);
3125 names += len + 1;
3126 /* Have udata.p point back to the original symbol this
3127 synthetic symbol was derived from. */
3128 s->udata.p = syms[i];
3129 s++;
3130 }
3131 }
3132 }
3133 else
3134 {
3135 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
3136 bfd_byte *contents;
3137 size_t size;
3138 long plt_count = 0;
3139 bfd_vma glink_vma = 0, resolv_vma = 0;
3140 asection *dynamic, *glink = NULL, *relplt = NULL;
3141 arelent *p;
3142
3143 if (!bfd_malloc_and_get_section (abfd, opd, &contents))
3144 {
3145 if (contents)
3146 {
3147 free_contents_and_exit:
3148 free (contents);
3149 }
3150 count = -1;
3151 goto done;
3152 }
3153
3154 size = 0;
3155 for (i = secsymend; i < opdsymend; ++i)
3156 {
3157 bfd_vma ent;
3158
3159 /* Ignore bogus symbols. */
3160 if (syms[i]->value > opd->size - 8)
3161 continue;
3162
3163 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3164 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3165 {
3166 ++count;
3167 size += sizeof (asymbol);
3168 size += strlen (syms[i]->name) + 2;
3169 }
3170 }
3171
3172 /* Get start of .glink stubs from DT_PPC64_GLINK. */
3173 if (dyn_count != 0
3174 && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL)
3175 {
3176 bfd_byte *dynbuf, *extdyn, *extdynend;
3177 size_t extdynsize;
3178 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
3179
3180 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
3181 goto free_contents_and_exit;
3182
3183 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
3184 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
3185
3186 extdyn = dynbuf;
3187 extdynend = extdyn + dynamic->size;
3188 for (; extdyn < extdynend; extdyn += extdynsize)
3189 {
3190 Elf_Internal_Dyn dyn;
3191 (*swap_dyn_in) (abfd, extdyn, &dyn);
3192
3193 if (dyn.d_tag == DT_NULL)
3194 break;
3195
3196 if (dyn.d_tag == DT_PPC64_GLINK)
3197 {
3198 /* The first glink stub starts at offset 32; see comment in
3199 ppc64_elf_finish_dynamic_sections. */
3200 glink_vma = dyn.d_un.d_val + 32;
3201 /* The .glink section usually does not survive the final
3202 link; search for the section (usually .text) where the
3203 glink stubs now reside. */
3204 glink = bfd_sections_find_if (abfd, section_covers_vma,
3205 &glink_vma);
3206 break;
3207 }
3208 }
3209
3210 free (dynbuf);
3211 }
3212
3213 if (glink != NULL)
3214 {
3215 /* Determine __glink trampoline by reading the relative branch
3216 from the first glink stub. */
3217 bfd_byte buf[4];
3218 if (bfd_get_section_contents (abfd, glink, buf,
3219 glink_vma + 4 - glink->vma, 4))
3220 {
3221 unsigned int insn = bfd_get_32 (abfd, buf);
3222 insn ^= B_DOT;
3223 if ((insn & ~0x3fffffc) == 0)
3224 resolv_vma = glink_vma + 4 + (insn ^ 0x2000000) - 0x2000000;
3225 }
3226
3227 if (resolv_vma)
3228 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3229
3230 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
3231 if (relplt != NULL)
3232 {
3233 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3234 if (! (*slurp_relocs) (abfd, relplt, dyn_syms, TRUE))
3235 goto free_contents_and_exit;
3236
3237 plt_count = relplt->size / sizeof (Elf64_External_Rela);
3238 size += plt_count * sizeof (asymbol);
3239
3240 p = relplt->relocation;
3241 for (i = 0; i < plt_count; i++, p++)
3242 {
3243 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3244 if (p->addend != 0)
3245 size += sizeof ("+0x") - 1 + 16;
3246 }
3247 }
3248 }
3249
3250 s = *ret = bfd_malloc (size);
3251 if (s == NULL)
3252 goto free_contents_and_exit;
3253
3254 names = (char *) (s + count + plt_count + (resolv_vma != 0));
3255
3256 for (i = secsymend; i < opdsymend; ++i)
3257 {
3258 bfd_vma ent;
3259
3260 if (syms[i]->value > opd->size - 8)
3261 continue;
3262
3263 ent = bfd_get_64 (abfd, contents + syms[i]->value);
3264 if (!sym_exists_at (syms, opdsymend, symcount, -1, ent))
3265 {
3266 long lo, hi;
3267 size_t len;
3268 asection *sec = abfd->sections;
3269
3270 *s = *syms[i];
3271 lo = codesecsym;
3272 hi = codesecsymend;
3273 while (lo < hi)
3274 {
3275 long mid = (lo + hi) >> 1;
3276 if (syms[mid]->section->vma < ent)
3277 lo = mid + 1;
3278 else if (syms[mid]->section->vma > ent)
3279 hi = mid;
3280 else
3281 {
3282 sec = syms[mid]->section;
3283 break;
3284 }
3285 }
3286
3287 if (lo >= hi && lo > codesecsym)
3288 sec = syms[lo - 1]->section;
3289
3290 for (; sec != NULL; sec = sec->next)
3291 {
3292 if (sec->vma > ent)
3293 break;
3294 /* SEC_LOAD may not be set if SEC is from a separate debug
3295 info file. */
3296 if ((sec->flags & SEC_ALLOC) == 0)
3297 break;
3298 if ((sec->flags & SEC_CODE) != 0)
3299 s->section = sec;
3300 }
3301 s->flags |= BSF_SYNTHETIC;
3302 s->value = ent - s->section->vma;
3303 s->name = names;
3304 *names++ = '.';
3305 len = strlen (syms[i]->name);
3306 memcpy (names, syms[i]->name, len + 1);
3307 names += len + 1;
3308 /* Have udata.p point back to the original symbol this
3309 synthetic symbol was derived from. */
3310 s->udata.p = syms[i];
3311 s++;
3312 }
3313 }
3314 free (contents);
3315
3316 if (glink != NULL && relplt != NULL)
3317 {
3318 if (resolv_vma)
3319 {
3320 /* Add a symbol for the main glink trampoline. */
3321 memset (s, 0, sizeof *s);
3322 s->the_bfd = abfd;
3323 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3324 s->section = glink;
3325 s->value = resolv_vma - glink->vma;
3326 s->name = names;
3327 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3328 names += sizeof ("__glink_PLTresolve");
3329 s++;
3330 count++;
3331 }
3332
3333 /* FIXME: It would be very much nicer to put sym@plt on the
3334 stub rather than on the glink branch table entry. The
3335 objdump disassembler would then use a sensible symbol
3336 name on plt calls. The difficulty in doing so is
3337 a) finding the stubs, and,
3338 b) matching stubs against plt entries, and,
3339 c) there can be multiple stubs for a given plt entry.
3340
3341 Solving (a) could be done by code scanning, but older
3342 ppc64 binaries used different stubs to current code.
3343 (b) is the tricky one since you need to known the toc
3344 pointer for at least one function that uses a pic stub to
3345 be able to calculate the plt address referenced.
3346 (c) means gdb would need to set multiple breakpoints (or
3347 find the glink branch itself) when setting breakpoints
3348 for pending shared library loads. */
3349 p = relplt->relocation;
3350 for (i = 0; i < plt_count; i++, p++)
3351 {
3352 size_t len;
3353
3354 *s = **p->sym_ptr_ptr;
3355 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3356 we are defining a symbol, ensure one of them is set. */
3357 if ((s->flags & BSF_LOCAL) == 0)
3358 s->flags |= BSF_GLOBAL;
3359 s->flags |= BSF_SYNTHETIC;
3360 s->section = glink;
3361 s->value = glink_vma - glink->vma;
3362 s->name = names;
3363 s->udata.p = NULL;
3364 len = strlen ((*p->sym_ptr_ptr)->name);
3365 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3366 names += len;
3367 if (p->addend != 0)
3368 {
3369 memcpy (names, "+0x", sizeof ("+0x") - 1);
3370 names += sizeof ("+0x") - 1;
3371 bfd_sprintf_vma (abfd, names, p->addend);
3372 names += strlen (names);
3373 }
3374 memcpy (names, "@plt", sizeof ("@plt"));
3375 names += sizeof ("@plt");
3376 s++;
3377 glink_vma += 8;
3378 if (i >= 0x8000)
3379 glink_vma += 4;
3380 }
3381 count += plt_count;
3382 }
3383 }
3384
3385 done:
3386 free (syms);
3387 return count;
3388 }
3389 \f
3390 /* The following functions are specific to the ELF linker, while
3391 functions above are used generally. Those named ppc64_elf_* are
3392 called by the main ELF linker code. They appear in this file more
3393 or less in the order in which they are called. eg.
3394 ppc64_elf_check_relocs is called early in the link process,
3395 ppc64_elf_finish_dynamic_sections is one of the last functions
3396 called.
3397
3398 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
3399 functions have both a function code symbol and a function descriptor
3400 symbol. A call to foo in a relocatable object file looks like:
3401
3402 . .text
3403 . x:
3404 . bl .foo
3405 . nop
3406
3407 The function definition in another object file might be:
3408
3409 . .section .opd
3410 . foo: .quad .foo
3411 . .quad .TOC.@tocbase
3412 . .quad 0
3413 .
3414 . .text
3415 . .foo: blr
3416
3417 When the linker resolves the call during a static link, the branch
3418 unsurprisingly just goes to .foo and the .opd information is unused.
3419 If the function definition is in a shared library, things are a little
3420 different: The call goes via a plt call stub, the opd information gets
3421 copied to the plt, and the linker patches the nop.
3422
3423 . x:
3424 . bl .foo_stub
3425 . ld 2,40(1)
3426 .
3427 .
3428 . .foo_stub:
3429 . addis 12,2,Lfoo@toc@ha # in practice, the call stub
3430 . addi 12,12,Lfoo@toc@l # is slightly optimized, but
3431 . std 2,40(1) # this is the general idea
3432 . ld 11,0(12)
3433 . ld 2,8(12)
3434 . mtctr 11
3435 . ld 11,16(12)
3436 . bctr
3437 .
3438 . .section .plt
3439 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
3440
3441 The "reloc ()" notation is supposed to indicate that the linker emits
3442 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
3443 copying.
3444
3445 What are the difficulties here? Well, firstly, the relocations
3446 examined by the linker in check_relocs are against the function code
3447 sym .foo, while the dynamic relocation in the plt is emitted against
3448 the function descriptor symbol, foo. Somewhere along the line, we need
3449 to carefully copy dynamic link information from one symbol to the other.
3450 Secondly, the generic part of the elf linker will make .foo a dynamic
3451 symbol as is normal for most other backends. We need foo dynamic
3452 instead, at least for an application final link. However, when
3453 creating a shared library containing foo, we need to have both symbols
3454 dynamic so that references to .foo are satisfied during the early
3455 stages of linking. Otherwise the linker might decide to pull in a
3456 definition from some other object, eg. a static library.
3457
3458 Update: As of August 2004, we support a new convention. Function
3459 calls may use the function descriptor symbol, ie. "bl foo". This
3460 behaves exactly as "bl .foo". */
3461
3462 /* Of those relocs that might be copied as dynamic relocs, this function
3463 selects those that must be copied when linking a shared library,
3464 even when the symbol is local. */
3465
3466 static int
3467 must_be_dyn_reloc (struct bfd_link_info *info,
3468 enum elf_ppc64_reloc_type r_type)
3469 {
3470 switch (r_type)
3471 {
3472 default:
3473 return 1;
3474
3475 case R_PPC64_REL32:
3476 case R_PPC64_REL64:
3477 case R_PPC64_REL30:
3478 return 0;
3479
3480 case R_PPC64_TPREL16:
3481 case R_PPC64_TPREL16_LO:
3482 case R_PPC64_TPREL16_HI:
3483 case R_PPC64_TPREL16_HA:
3484 case R_PPC64_TPREL16_DS:
3485 case R_PPC64_TPREL16_LO_DS:
3486 case R_PPC64_TPREL16_HIGHER:
3487 case R_PPC64_TPREL16_HIGHERA:
3488 case R_PPC64_TPREL16_HIGHEST:
3489 case R_PPC64_TPREL16_HIGHESTA:
3490 case R_PPC64_TPREL64:
3491 return !info->executable;
3492 }
3493 }
3494
3495 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3496 copying dynamic variables from a shared lib into an app's dynbss
3497 section, and instead use a dynamic relocation to point into the
3498 shared lib. With code that gcc generates, it's vital that this be
3499 enabled; In the PowerPC64 ABI, the address of a function is actually
3500 the address of a function descriptor, which resides in the .opd
3501 section. gcc uses the descriptor directly rather than going via the
3502 GOT as some other ABI's do, which means that initialized function
3503 pointers must reference the descriptor. Thus, a function pointer
3504 initialized to the address of a function in a shared library will
3505 either require a copy reloc, or a dynamic reloc. Using a copy reloc
3506 redefines the function descriptor symbol to point to the copy. This
3507 presents a problem as a plt entry for that function is also
3508 initialized from the function descriptor symbol and the copy reloc
3509 may not be initialized first. */
3510 #define ELIMINATE_COPY_RELOCS 1
3511
3512 /* Section name for stubs is the associated section name plus this
3513 string. */
3514 #define STUB_SUFFIX ".stub"
3515
3516 /* Linker stubs.
3517 ppc_stub_long_branch:
3518 Used when a 14 bit branch (or even a 24 bit branch) can't reach its
3519 destination, but a 24 bit branch in a stub section will reach.
3520 . b dest
3521
3522 ppc_stub_plt_branch:
3523 Similar to the above, but a 24 bit branch in the stub section won't
3524 reach its destination.
3525 . addis %r12,%r2,xxx@toc@ha
3526 . ld %r11,xxx@toc@l(%r12)
3527 . mtctr %r11
3528 . bctr
3529
3530 ppc_stub_plt_call:
3531 Used to call a function in a shared library. If it so happens that
3532 the plt entry referenced crosses a 64k boundary, then an extra
3533 "addi %r12,%r12,xxx@toc@l" will be inserted before the "mtctr".
3534 . addis %r12,%r2,xxx@toc@ha
3535 . std %r2,40(%r1)
3536 . ld %r11,xxx+0@toc@l(%r12)
3537 . mtctr %r11
3538 . ld %r2,xxx+8@toc@l(%r12)
3539 . ld %r11,xxx+16@toc@l(%r12)
3540 . bctr
3541
3542 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional
3543 code to adjust the value and save r2 to support multiple toc sections.
3544 A ppc_stub_long_branch with an r2 offset looks like:
3545 . std %r2,40(%r1)
3546 . addis %r2,%r2,off@ha
3547 . addi %r2,%r2,off@l
3548 . b dest
3549
3550 A ppc_stub_plt_branch with an r2 offset looks like:
3551 . std %r2,40(%r1)
3552 . addis %r12,%r2,xxx@toc@ha
3553 . ld %r11,xxx@toc@l(%r12)
3554 . addis %r2,%r2,off@ha
3555 . addi %r2,%r2,off@l
3556 . mtctr %r11
3557 . bctr
3558
3559 In cases where the "addis" instruction would add zero, the "addis" is
3560 omitted and following instructions modified slightly in some cases.
3561 */
3562
3563 enum ppc_stub_type {
3564 ppc_stub_none,
3565 ppc_stub_long_branch,
3566 ppc_stub_long_branch_r2off,
3567 ppc_stub_plt_branch,
3568 ppc_stub_plt_branch_r2off,
3569 ppc_stub_plt_call
3570 };
3571
3572 struct ppc_stub_hash_entry {
3573
3574 /* Base hash table entry structure. */
3575 struct bfd_hash_entry root;
3576
3577 enum ppc_stub_type stub_type;
3578
3579 /* The stub section. */
3580 asection *stub_sec;
3581
3582 /* Offset within stub_sec of the beginning of this stub. */
3583 bfd_vma stub_offset;
3584
3585 /* Given the symbol's value and its section we can determine its final
3586 value when building the stubs (so the stub knows where to jump. */
3587 bfd_vma target_value;
3588 asection *target_section;
3589
3590 /* The symbol table entry, if any, that this was derived from. */
3591 struct ppc_link_hash_entry *h;
3592 struct plt_entry *plt_ent;
3593
3594 /* And the reloc addend that this was derived from. */
3595 bfd_vma addend;
3596
3597 /* Where this stub is being called from, or, in the case of combined
3598 stub sections, the first input section in the group. */
3599 asection *id_sec;
3600 };
3601
3602 struct ppc_branch_hash_entry {
3603
3604 /* Base hash table entry structure. */
3605 struct bfd_hash_entry root;
3606
3607 /* Offset within branch lookup table. */
3608 unsigned int offset;
3609
3610 /* Generation marker. */
3611 unsigned int iter;
3612 };
3613
3614 struct ppc_link_hash_entry
3615 {
3616 struct elf_link_hash_entry elf;
3617
3618 union {
3619 /* A pointer to the most recently used stub hash entry against this
3620 symbol. */
3621 struct ppc_stub_hash_entry *stub_cache;
3622
3623 /* A pointer to the next symbol starting with a '.' */
3624 struct ppc_link_hash_entry *next_dot_sym;
3625 } u;
3626
3627 /* Track dynamic relocs copied for this symbol. */
3628 struct elf_dyn_relocs *dyn_relocs;
3629
3630 /* Link between function code and descriptor symbols. */
3631 struct ppc_link_hash_entry *oh;
3632
3633 /* Flag function code and descriptor symbols. */
3634 unsigned int is_func:1;
3635 unsigned int is_func_descriptor:1;
3636 unsigned int fake:1;
3637
3638 /* Whether global opd/toc sym has been adjusted or not.
3639 After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag
3640 should be set for all globals defined in any opd/toc section. */
3641 unsigned int adjust_done:1;
3642
3643 /* Set if we twiddled this symbol to weak at some stage. */
3644 unsigned int was_undefined:1;
3645
3646 /* Contexts in which symbol is used in the GOT (or TOC).
3647 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the
3648 corresponding relocs are encountered during check_relocs.
3649 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3650 indicate the corresponding GOT entry type is not needed.
3651 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into
3652 a TPREL one. We use a separate flag rather than setting TPREL
3653 just for convenience in distinguishing the two cases. */
3654 #define TLS_GD 1 /* GD reloc. */
3655 #define TLS_LD 2 /* LD reloc. */
3656 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3657 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3658 #define TLS_TLS 16 /* Any TLS reloc. */
3659 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */
3660 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3661 #define PLT_IFUNC 128 /* STT_GNU_IFUNC. */
3662 unsigned char tls_mask;
3663 };
3664
3665 /* ppc64 ELF linker hash table. */
3666
3667 struct ppc_link_hash_table
3668 {
3669 struct elf_link_hash_table elf;
3670
3671 /* The stub hash table. */
3672 struct bfd_hash_table stub_hash_table;
3673
3674 /* Another hash table for plt_branch stubs. */
3675 struct bfd_hash_table branch_hash_table;
3676
3677 /* Linker stub bfd. */
3678 bfd *stub_bfd;
3679
3680 /* Linker call-backs. */
3681 asection * (*add_stub_section) (const char *, asection *);
3682 void (*layout_sections_again) (void);
3683
3684 /* Array to keep track of which stub sections have been created, and
3685 information on stub grouping. */
3686 struct map_stub {
3687 /* This is the section to which stubs in the group will be attached. */
3688 asection *link_sec;
3689 /* The stub section. */
3690 asection *stub_sec;
3691 /* Along with elf_gp, specifies the TOC pointer used in this group. */
3692 bfd_vma toc_off;
3693 } *stub_group;
3694
3695 /* Temp used when calculating TOC pointers. */
3696 bfd_vma toc_curr;
3697 bfd *toc_bfd;
3698 asection *toc_first_sec;
3699
3700 /* Highest input section id. */
3701 int top_id;
3702
3703 /* Highest output section index. */
3704 int top_index;
3705
3706 /* Used when adding symbols. */
3707 struct ppc_link_hash_entry *dot_syms;
3708
3709 /* List of input sections for each output section. */
3710 asection **input_list;
3711
3712 /* Short-cuts to get to dynamic linker sections. */
3713 asection *got;
3714 asection *plt;
3715 asection *relplt;
3716 asection *iplt;
3717 asection *reliplt;
3718 asection *dynbss;
3719 asection *relbss;
3720 asection *glink;
3721 asection *sfpr;
3722 asection *brlt;
3723 asection *relbrlt;
3724 asection *glink_eh_frame;
3725
3726 /* Shortcut to .__tls_get_addr and __tls_get_addr. */
3727 struct ppc_link_hash_entry *tls_get_addr;
3728 struct ppc_link_hash_entry *tls_get_addr_fd;
3729
3730 /* The size of reliplt used by got entry relocs. */
3731 bfd_size_type got_reli_size;
3732
3733 /* Statistics. */
3734 unsigned long stub_count[ppc_stub_plt_call];
3735
3736 /* Number of stubs against global syms. */
3737 unsigned long stub_globals;
3738
3739 /* Set if PLT call stubs should load r11. */
3740 unsigned int plt_static_chain:1;
3741
3742 /* Set if we should emit symbols for stubs. */
3743 unsigned int emit_stub_syms:1;
3744
3745 /* Set if __tls_get_addr optimization should not be done. */
3746 unsigned int no_tls_get_addr_opt:1;
3747
3748 /* Support for multiple toc sections. */
3749 unsigned int do_multi_toc:1;
3750 unsigned int multi_toc_needed:1;
3751 unsigned int second_toc_pass:1;
3752 unsigned int do_toc_opt:1;
3753
3754 /* Set on error. */
3755 unsigned int stub_error:1;
3756
3757 /* Temp used by ppc64_elf_process_dot_syms. */
3758 unsigned int twiddled_syms:1;
3759
3760 /* Incremented every time we size stubs. */
3761 unsigned int stub_iteration;
3762
3763 /* Small local sym cache. */
3764 struct sym_cache sym_cache;
3765 };
3766
3767 /* Rename some of the generic section flags to better document how they
3768 are used here. */
3769
3770 /* Nonzero if this section has TLS related relocations. */
3771 #define has_tls_reloc sec_flg0
3772
3773 /* Nonzero if this section has a call to __tls_get_addr. */
3774 #define has_tls_get_addr_call sec_flg1
3775
3776 /* Nonzero if this section has any toc or got relocs. */
3777 #define has_toc_reloc sec_flg2
3778
3779 /* Nonzero if this section has a call to another section that uses
3780 the toc or got. */
3781 #define makes_toc_func_call sec_flg3
3782
3783 /* Recursion protection when determining above flag. */
3784 #define call_check_in_progress sec_flg4
3785 #define call_check_done sec_flg5
3786
3787 /* Get the ppc64 ELF linker hash table from a link_info structure. */
3788
3789 #define ppc_hash_table(p) \
3790 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3791 == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL)
3792
3793 #define ppc_stub_hash_lookup(table, string, create, copy) \
3794 ((struct ppc_stub_hash_entry *) \
3795 bfd_hash_lookup ((table), (string), (create), (copy)))
3796
3797 #define ppc_branch_hash_lookup(table, string, create, copy) \
3798 ((struct ppc_branch_hash_entry *) \
3799 bfd_hash_lookup ((table), (string), (create), (copy)))
3800
3801 /* Create an entry in the stub hash table. */
3802
3803 static struct bfd_hash_entry *
3804 stub_hash_newfunc (struct bfd_hash_entry *entry,
3805 struct bfd_hash_table *table,
3806 const char *string)
3807 {
3808 /* Allocate the structure if it has not already been allocated by a
3809 subclass. */
3810 if (entry == NULL)
3811 {
3812 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
3813 if (entry == NULL)
3814 return entry;
3815 }
3816
3817 /* Call the allocation method of the superclass. */
3818 entry = bfd_hash_newfunc (entry, table, string);
3819 if (entry != NULL)
3820 {
3821 struct ppc_stub_hash_entry *eh;
3822
3823 /* Initialize the local fields. */
3824 eh = (struct ppc_stub_hash_entry *) entry;
3825 eh->stub_type = ppc_stub_none;
3826 eh->stub_sec = NULL;
3827 eh->stub_offset = 0;
3828 eh->target_value = 0;
3829 eh->target_section = NULL;
3830 eh->h = NULL;
3831 eh->id_sec = NULL;
3832 }
3833
3834 return entry;
3835 }
3836
3837 /* Create an entry in the branch hash table. */
3838
3839 static struct bfd_hash_entry *
3840 branch_hash_newfunc (struct bfd_hash_entry *entry,
3841 struct bfd_hash_table *table,
3842 const char *string)
3843 {
3844 /* Allocate the structure if it has not already been allocated by a
3845 subclass. */
3846 if (entry == NULL)
3847 {
3848 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
3849 if (entry == NULL)
3850 return entry;
3851 }
3852
3853 /* Call the allocation method of the superclass. */
3854 entry = bfd_hash_newfunc (entry, table, string);
3855 if (entry != NULL)
3856 {
3857 struct ppc_branch_hash_entry *eh;
3858
3859 /* Initialize the local fields. */
3860 eh = (struct ppc_branch_hash_entry *) entry;
3861 eh->offset = 0;
3862 eh->iter = 0;
3863 }
3864
3865 return entry;
3866 }
3867
3868 /* Create an entry in a ppc64 ELF linker hash table. */
3869
3870 static struct bfd_hash_entry *
3871 link_hash_newfunc (struct bfd_hash_entry *entry,
3872 struct bfd_hash_table *table,
3873 const char *string)
3874 {
3875 /* Allocate the structure if it has not already been allocated by a
3876 subclass. */
3877 if (entry == NULL)
3878 {
3879 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
3880 if (entry == NULL)
3881 return entry;
3882 }
3883
3884 /* Call the allocation method of the superclass. */
3885 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3886 if (entry != NULL)
3887 {
3888 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
3889
3890 memset (&eh->u.stub_cache, 0,
3891 (sizeof (struct ppc_link_hash_entry)
3892 - offsetof (struct ppc_link_hash_entry, u.stub_cache)));
3893
3894 /* When making function calls, old ABI code references function entry
3895 points (dot symbols), while new ABI code references the function
3896 descriptor symbol. We need to make any combination of reference and
3897 definition work together, without breaking archive linking.
3898
3899 For a defined function "foo" and an undefined call to "bar":
3900 An old object defines "foo" and ".foo", references ".bar" (possibly
3901 "bar" too).
3902 A new object defines "foo" and references "bar".
3903
3904 A new object thus has no problem with its undefined symbols being
3905 satisfied by definitions in an old object. On the other hand, the
3906 old object won't have ".bar" satisfied by a new object.
3907
3908 Keep a list of newly added dot-symbols. */
3909
3910 if (string[0] == '.')
3911 {
3912 struct ppc_link_hash_table *htab;
3913
3914 htab = (struct ppc_link_hash_table *) table;
3915 eh->u.next_dot_sym = htab->dot_syms;
3916 htab->dot_syms = eh;
3917 }
3918 }
3919
3920 return entry;
3921 }
3922
3923 /* Create a ppc64 ELF linker hash table. */
3924
3925 static struct bfd_link_hash_table *
3926 ppc64_elf_link_hash_table_create (bfd *abfd)
3927 {
3928 struct ppc_link_hash_table *htab;
3929 bfd_size_type amt = sizeof (struct ppc_link_hash_table);
3930
3931 htab = bfd_zmalloc (amt);
3932 if (htab == NULL)
3933 return NULL;
3934
3935 if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc,
3936 sizeof (struct ppc_link_hash_entry),
3937 PPC64_ELF_DATA))
3938 {
3939 free (htab);
3940 return NULL;
3941 }
3942
3943 /* Init the stub hash table too. */
3944 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc,
3945 sizeof (struct ppc_stub_hash_entry)))
3946 return NULL;
3947
3948 /* And the branch hash table. */
3949 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc,
3950 sizeof (struct ppc_branch_hash_entry)))
3951 return NULL;
3952
3953 /* Initializing two fields of the union is just cosmetic. We really
3954 only care about glist, but when compiled on a 32-bit host the
3955 bfd_vma fields are larger. Setting the bfd_vma to zero makes
3956 debugger inspection of these fields look nicer. */
3957 htab->elf.init_got_refcount.refcount = 0;
3958 htab->elf.init_got_refcount.glist = NULL;
3959 htab->elf.init_plt_refcount.refcount = 0;
3960 htab->elf.init_plt_refcount.glist = NULL;
3961 htab->elf.init_got_offset.offset = 0;
3962 htab->elf.init_got_offset.glist = NULL;
3963 htab->elf.init_plt_offset.offset = 0;
3964 htab->elf.init_plt_offset.glist = NULL;
3965
3966 return &htab->elf.root;
3967 }
3968
3969 /* Free the derived linker hash table. */
3970
3971 static void
3972 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash)
3973 {
3974 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
3975
3976 bfd_hash_table_free (&ret->stub_hash_table);
3977 bfd_hash_table_free (&ret->branch_hash_table);
3978 _bfd_generic_link_hash_table_free (hash);
3979 }
3980
3981 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */
3982
3983 void
3984 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info)
3985 {
3986 struct ppc_link_hash_table *htab;
3987
3988 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64;
3989
3990 /* Always hook our dynamic sections into the first bfd, which is the
3991 linker created stub bfd. This ensures that the GOT header is at
3992 the start of the output TOC section. */
3993 htab = ppc_hash_table (info);
3994 if (htab == NULL)
3995 return;
3996 htab->stub_bfd = abfd;
3997 htab->elf.dynobj = abfd;
3998 }
3999
4000 /* Build a name for an entry in the stub hash table. */
4001
4002 static char *
4003 ppc_stub_name (const asection *input_section,
4004 const asection *sym_sec,
4005 const struct ppc_link_hash_entry *h,
4006 const Elf_Internal_Rela *rel)
4007 {
4008 char *stub_name;
4009 bfd_size_type len;
4010
4011 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
4012 offsets from a sym as a branch target? In fact, we could
4013 probably assume the addend is always zero. */
4014 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
4015
4016 if (h)
4017 {
4018 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
4019 stub_name = bfd_malloc (len);
4020 if (stub_name == NULL)
4021 return stub_name;
4022
4023 sprintf (stub_name, "%08x.%s+%x",
4024 input_section->id & 0xffffffff,
4025 h->elf.root.root.string,
4026 (int) rel->r_addend & 0xffffffff);
4027 }
4028 else
4029 {
4030 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
4031 stub_name = bfd_malloc (len);
4032 if (stub_name == NULL)
4033 return stub_name;
4034
4035 sprintf (stub_name, "%08x.%x:%x+%x",
4036 input_section->id & 0xffffffff,
4037 sym_sec->id & 0xffffffff,
4038 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
4039 (int) rel->r_addend & 0xffffffff);
4040 }
4041 if (stub_name[len - 2] == '+' && stub_name[len - 1] == '0')
4042 stub_name[len - 2] = 0;
4043 return stub_name;
4044 }
4045
4046 /* Look up an entry in the stub hash. Stub entries are cached because
4047 creating the stub name takes a bit of time. */
4048
4049 static struct ppc_stub_hash_entry *
4050 ppc_get_stub_entry (const asection *input_section,
4051 const asection *sym_sec,
4052 struct ppc_link_hash_entry *h,
4053 const Elf_Internal_Rela *rel,
4054 struct ppc_link_hash_table *htab)
4055 {
4056 struct ppc_stub_hash_entry *stub_entry;
4057 const asection *id_sec;
4058
4059 /* If this input section is part of a group of sections sharing one
4060 stub section, then use the id of the first section in the group.
4061 Stub names need to include a section id, as there may well be
4062 more than one stub used to reach say, printf, and we need to
4063 distinguish between them. */
4064 id_sec = htab->stub_group[input_section->id].link_sec;
4065
4066 if (h != NULL && h->u.stub_cache != NULL
4067 && h->u.stub_cache->h == h
4068 && h->u.stub_cache->id_sec == id_sec)
4069 {
4070 stub_entry = h->u.stub_cache;
4071 }
4072 else
4073 {
4074 char *stub_name;
4075
4076 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
4077 if (stub_name == NULL)
4078 return NULL;
4079
4080 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
4081 stub_name, FALSE, FALSE);
4082 if (h != NULL)
4083 h->u.stub_cache = stub_entry;
4084
4085 free (stub_name);
4086 }
4087
4088 return stub_entry;
4089 }
4090
4091 /* Add a new stub entry to the stub hash. Not all fields of the new
4092 stub entry are initialised. */
4093
4094 static struct ppc_stub_hash_entry *
4095 ppc_add_stub (const char *stub_name,
4096 asection *section,
4097 struct bfd_link_info *info)
4098 {
4099 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4100 asection *link_sec;
4101 asection *stub_sec;
4102 struct ppc_stub_hash_entry *stub_entry;
4103
4104 link_sec = htab->stub_group[section->id].link_sec;
4105 stub_sec = htab->stub_group[section->id].stub_sec;
4106 if (stub_sec == NULL)
4107 {
4108 stub_sec = htab->stub_group[link_sec->id].stub_sec;
4109 if (stub_sec == NULL)
4110 {
4111 size_t namelen;
4112 bfd_size_type len;
4113 char *s_name;
4114
4115 namelen = strlen (link_sec->name);
4116 len = namelen + sizeof (STUB_SUFFIX);
4117 s_name = bfd_alloc (htab->stub_bfd, len);
4118 if (s_name == NULL)
4119 return NULL;
4120
4121 memcpy (s_name, link_sec->name, namelen);
4122 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
4123 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
4124 if (stub_sec == NULL)
4125 return NULL;
4126 htab->stub_group[link_sec->id].stub_sec = stub_sec;
4127 }
4128 htab->stub_group[section->id].stub_sec = stub_sec;
4129 }
4130
4131 /* Enter this entry into the linker stub hash table. */
4132 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4133 TRUE, FALSE);
4134 if (stub_entry == NULL)
4135 {
4136 info->callbacks->einfo (_("%B: cannot create stub entry %s\n"),
4137 section->owner, stub_name);
4138 return NULL;
4139 }
4140
4141 stub_entry->stub_sec = stub_sec;
4142 stub_entry->stub_offset = 0;
4143 stub_entry->id_sec = link_sec;
4144 return stub_entry;
4145 }
4146
4147 /* Create sections for linker generated code. */
4148
4149 static bfd_boolean
4150 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info)
4151 {
4152 struct ppc_link_hash_table *htab;
4153 flagword flags;
4154
4155 htab = ppc_hash_table (info);
4156 if (htab == NULL)
4157 return FALSE;
4158
4159 /* Create .sfpr for code to save and restore fp regs. */
4160 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
4161 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4162 htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr",
4163 flags);
4164 if (htab->sfpr == NULL
4165 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
4166 return FALSE;
4167
4168 /* Create .glink for lazy dynamic linking support. */
4169 htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink",
4170 flags);
4171 if (htab->glink == NULL
4172 || ! bfd_set_section_alignment (dynobj, htab->glink, 3))
4173 return FALSE;
4174
4175 if (!info->no_ld_generated_unwind_info)
4176 {
4177 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
4178 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4179 htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
4180 ".eh_frame",
4181 flags);
4182 if (htab->glink_eh_frame == NULL
4183 || !bfd_set_section_alignment (abfd, htab->glink_eh_frame, 2))
4184 return FALSE;
4185 }
4186
4187 flags = SEC_ALLOC | SEC_LINKER_CREATED;
4188 htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
4189 if (htab->iplt == NULL
4190 || ! bfd_set_section_alignment (dynobj, htab->iplt, 3))
4191 return FALSE;
4192
4193 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4194 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4195 htab->reliplt = bfd_make_section_anyway_with_flags (dynobj,
4196 ".rela.iplt",
4197 flags);
4198 if (htab->reliplt == NULL
4199 || ! bfd_set_section_alignment (dynobj, htab->reliplt, 3))
4200 return FALSE;
4201
4202 /* Create branch lookup table for plt_branch stubs. */
4203 flags = (SEC_ALLOC | SEC_LOAD
4204 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4205 htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt",
4206 flags);
4207 if (htab->brlt == NULL
4208 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3))
4209 return FALSE;
4210
4211 if (!info->shared)
4212 return TRUE;
4213
4214 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
4215 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4216 htab->relbrlt = bfd_make_section_anyway_with_flags (dynobj,
4217 ".rela.branch_lt",
4218 flags);
4219 if (htab->relbrlt == NULL
4220 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3))
4221 return FALSE;
4222
4223 return TRUE;
4224 }
4225
4226 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if
4227 not already done. */
4228
4229 static bfd_boolean
4230 create_got_section (bfd *abfd, struct bfd_link_info *info)
4231 {
4232 asection *got, *relgot;
4233 flagword flags;
4234 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4235
4236 if (!is_ppc64_elf (abfd))
4237 return FALSE;
4238 if (htab == NULL)
4239 return FALSE;
4240
4241 if (!htab->got)
4242 {
4243 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info))
4244 return FALSE;
4245
4246 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got");
4247 if (!htab->got)
4248 abort ();
4249 }
4250
4251 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4252 | SEC_LINKER_CREATED);
4253
4254 got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4255 if (!got
4256 || !bfd_set_section_alignment (abfd, got, 3))
4257 return FALSE;
4258
4259 relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got",
4260 flags | SEC_READONLY);
4261 if (!relgot
4262 || ! bfd_set_section_alignment (abfd, relgot, 3))
4263 return FALSE;
4264
4265 ppc64_elf_tdata (abfd)->got = got;
4266 ppc64_elf_tdata (abfd)->relgot = relgot;
4267 return TRUE;
4268 }
4269
4270 /* Create the dynamic sections, and set up shortcuts. */
4271
4272 static bfd_boolean
4273 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4274 {
4275 struct ppc_link_hash_table *htab;
4276
4277 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
4278 return FALSE;
4279
4280 htab = ppc_hash_table (info);
4281 if (htab == NULL)
4282 return FALSE;
4283
4284 if (!htab->got)
4285 htab->got = bfd_get_section_by_name (dynobj, ".got");
4286 htab->plt = bfd_get_section_by_name (dynobj, ".plt");
4287 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt");
4288 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss");
4289 if (!info->shared)
4290 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss");
4291
4292 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss
4293 || (!info->shared && !htab->relbss))
4294 abort ();
4295
4296 return TRUE;
4297 }
4298
4299 /* Follow indirect and warning symbol links. */
4300
4301 static inline struct bfd_link_hash_entry *
4302 follow_link (struct bfd_link_hash_entry *h)
4303 {
4304 while (h->type == bfd_link_hash_indirect
4305 || h->type == bfd_link_hash_warning)
4306 h = h->u.i.link;
4307 return h;
4308 }
4309
4310 static inline struct elf_link_hash_entry *
4311 elf_follow_link (struct elf_link_hash_entry *h)
4312 {
4313 return (struct elf_link_hash_entry *) follow_link (&h->root);
4314 }
4315
4316 static inline struct ppc_link_hash_entry *
4317 ppc_follow_link (struct ppc_link_hash_entry *h)
4318 {
4319 return (struct ppc_link_hash_entry *) follow_link (&h->elf.root);
4320 }
4321
4322 /* Merge PLT info on FROM with that on TO. */
4323
4324 static void
4325 move_plt_plist (struct ppc_link_hash_entry *from,
4326 struct ppc_link_hash_entry *to)
4327 {
4328 if (from->elf.plt.plist != NULL)
4329 {
4330 if (to->elf.plt.plist != NULL)
4331 {
4332 struct plt_entry **entp;
4333 struct plt_entry *ent;
4334
4335 for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; )
4336 {
4337 struct plt_entry *dent;
4338
4339 for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next)
4340 if (dent->addend == ent->addend)
4341 {
4342 dent->plt.refcount += ent->plt.refcount;
4343 *entp = ent->next;
4344 break;
4345 }
4346 if (dent == NULL)
4347 entp = &ent->next;
4348 }
4349 *entp = to->elf.plt.plist;
4350 }
4351
4352 to->elf.plt.plist = from->elf.plt.plist;
4353 from->elf.plt.plist = NULL;
4354 }
4355 }
4356
4357 /* Copy the extra info we tack onto an elf_link_hash_entry. */
4358
4359 static void
4360 ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info,
4361 struct elf_link_hash_entry *dir,
4362 struct elf_link_hash_entry *ind)
4363 {
4364 struct ppc_link_hash_entry *edir, *eind;
4365
4366 edir = (struct ppc_link_hash_entry *) dir;
4367 eind = (struct ppc_link_hash_entry *) ind;
4368
4369 edir->is_func |= eind->is_func;
4370 edir->is_func_descriptor |= eind->is_func_descriptor;
4371 edir->tls_mask |= eind->tls_mask;
4372 if (eind->oh != NULL)
4373 edir->oh = ppc_follow_link (eind->oh);
4374
4375 /* If called to transfer flags for a weakdef during processing
4376 of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
4377 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
4378 if (!(ELIMINATE_COPY_RELOCS
4379 && eind->elf.root.type != bfd_link_hash_indirect
4380 && edir->elf.dynamic_adjusted))
4381 edir->elf.non_got_ref |= eind->elf.non_got_ref;
4382
4383 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
4384 edir->elf.ref_regular |= eind->elf.ref_regular;
4385 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
4386 edir->elf.needs_plt |= eind->elf.needs_plt;
4387
4388 /* If we were called to copy over info for a weak sym, that's all. */
4389 if (eind->elf.root.type != bfd_link_hash_indirect)
4390 return;
4391
4392 /* Copy over any dynamic relocs we may have on the indirect sym. */
4393 if (eind->dyn_relocs != NULL)
4394 {
4395 if (edir->dyn_relocs != NULL)
4396 {
4397 struct elf_dyn_relocs **pp;
4398 struct elf_dyn_relocs *p;
4399
4400 /* Add reloc counts against the indirect sym to the direct sym
4401 list. Merge any entries against the same section. */
4402 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4403 {
4404 struct elf_dyn_relocs *q;
4405
4406 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4407 if (q->sec == p->sec)
4408 {
4409 q->pc_count += p->pc_count;
4410 q->count += p->count;
4411 *pp = p->next;
4412 break;
4413 }
4414 if (q == NULL)
4415 pp = &p->next;
4416 }
4417 *pp = edir->dyn_relocs;
4418 }
4419
4420 edir->dyn_relocs = eind->dyn_relocs;
4421 eind->dyn_relocs = NULL;
4422 }
4423
4424 /* Copy over got entries that we may have already seen to the
4425 symbol which just became indirect. */
4426 if (eind->elf.got.glist != NULL)
4427 {
4428 if (edir->elf.got.glist != NULL)
4429 {
4430 struct got_entry **entp;
4431 struct got_entry *ent;
4432
4433 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; )
4434 {
4435 struct got_entry *dent;
4436
4437 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next)
4438 if (dent->addend == ent->addend
4439 && dent->owner == ent->owner
4440 && dent->tls_type == ent->tls_type)
4441 {
4442 dent->got.refcount += ent->got.refcount;
4443 *entp = ent->next;
4444 break;
4445 }
4446 if (dent == NULL)
4447 entp = &ent->next;
4448 }
4449 *entp = edir->elf.got.glist;
4450 }
4451
4452 edir->elf.got.glist = eind->elf.got.glist;
4453 eind->elf.got.glist = NULL;
4454 }
4455
4456 /* And plt entries. */
4457 move_plt_plist (eind, edir);
4458
4459 if (eind->elf.dynindx != -1)
4460 {
4461 if (edir->elf.dynindx != -1)
4462 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4463 edir->elf.dynstr_index);
4464 edir->elf.dynindx = eind->elf.dynindx;
4465 edir->elf.dynstr_index = eind->elf.dynstr_index;
4466 eind->elf.dynindx = -1;
4467 eind->elf.dynstr_index = 0;
4468 }
4469 }
4470
4471 /* Find the function descriptor hash entry from the given function code
4472 hash entry FH. Link the entries via their OH fields. */
4473
4474 static struct ppc_link_hash_entry *
4475 lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab)
4476 {
4477 struct ppc_link_hash_entry *fdh = fh->oh;
4478
4479 if (fdh == NULL)
4480 {
4481 const char *fd_name = fh->elf.root.root.string + 1;
4482
4483 fdh = (struct ppc_link_hash_entry *)
4484 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE);
4485 if (fdh == NULL)
4486 return fdh;
4487
4488 fdh->is_func_descriptor = 1;
4489 fdh->oh = fh;
4490 fh->is_func = 1;
4491 fh->oh = fdh;
4492 }
4493
4494 return ppc_follow_link (fdh);
4495 }
4496
4497 /* Make a fake function descriptor sym for the code sym FH. */
4498
4499 static struct ppc_link_hash_entry *
4500 make_fdh (struct bfd_link_info *info,
4501 struct ppc_link_hash_entry *fh)
4502 {
4503 bfd *abfd;
4504 asymbol *newsym;
4505 struct bfd_link_hash_entry *bh;
4506 struct ppc_link_hash_entry *fdh;
4507
4508 abfd = fh->elf.root.u.undef.abfd;
4509 newsym = bfd_make_empty_symbol (abfd);
4510 newsym->name = fh->elf.root.root.string + 1;
4511 newsym->section = bfd_und_section_ptr;
4512 newsym->value = 0;
4513 newsym->flags = BSF_WEAK;
4514
4515 bh = NULL;
4516 if (!_bfd_generic_link_add_one_symbol (info, abfd, newsym->name,
4517 newsym->flags, newsym->section,
4518 newsym->value, NULL, FALSE, FALSE,
4519 &bh))
4520 return NULL;
4521
4522 fdh = (struct ppc_link_hash_entry *) bh;
4523 fdh->elf.non_elf = 0;
4524 fdh->fake = 1;
4525 fdh->is_func_descriptor = 1;
4526 fdh->oh = fh;
4527 fh->is_func = 1;
4528 fh->oh = fdh;
4529 return fdh;
4530 }
4531
4532 /* Fix function descriptor symbols defined in .opd sections to be
4533 function type. */
4534
4535 static bfd_boolean
4536 ppc64_elf_add_symbol_hook (bfd *ibfd,
4537 struct bfd_link_info *info,
4538 Elf_Internal_Sym *isym,
4539 const char **name ATTRIBUTE_UNUSED,
4540 flagword *flags ATTRIBUTE_UNUSED,
4541 asection **sec,
4542 bfd_vma *value ATTRIBUTE_UNUSED)
4543 {
4544 if ((ibfd->flags & DYNAMIC) == 0
4545 && ELF_ST_BIND (isym->st_info) == STB_GNU_UNIQUE)
4546 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4547
4548 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4549 {
4550 if ((ibfd->flags & DYNAMIC) == 0)
4551 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4552 }
4553 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC)
4554 ;
4555 else if (*sec != NULL
4556 && strcmp ((*sec)->name, ".opd") == 0)
4557 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC);
4558
4559 return TRUE;
4560 }
4561
4562 /* This function makes an old ABI object reference to ".bar" cause the
4563 inclusion of a new ABI object archive that defines "bar".
4564 NAME is a symbol defined in an archive. Return a symbol in the hash
4565 table that might be satisfied by the archive symbols. */
4566
4567 static struct elf_link_hash_entry *
4568 ppc64_elf_archive_symbol_lookup (bfd *abfd,
4569 struct bfd_link_info *info,
4570 const char *name)
4571 {
4572 struct elf_link_hash_entry *h;
4573 char *dot_name;
4574 size_t len;
4575
4576 h = _bfd_elf_archive_symbol_lookup (abfd, info, name);
4577 if (h != NULL
4578 /* Don't return this sym if it is a fake function descriptor
4579 created by add_symbol_adjust. */
4580 && !(h->root.type == bfd_link_hash_undefweak
4581 && ((struct ppc_link_hash_entry *) h)->fake))
4582 return h;
4583
4584 if (name[0] == '.')
4585 return h;
4586
4587 len = strlen (name);
4588 dot_name = bfd_alloc (abfd, len + 2);
4589 if (dot_name == NULL)
4590 return (struct elf_link_hash_entry *) 0 - 1;
4591 dot_name[0] = '.';
4592 memcpy (dot_name + 1, name, len + 1);
4593 h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name);
4594 bfd_release (abfd, dot_name);
4595 return h;
4596 }
4597
4598 /* This function satisfies all old ABI object references to ".bar" if a
4599 new ABI object defines "bar". Well, at least, undefined dot symbols
4600 are made weak. This stops later archive searches from including an
4601 object if we already have a function descriptor definition. It also
4602 prevents the linker complaining about undefined symbols.
4603 We also check and correct mismatched symbol visibility here. The
4604 most restrictive visibility of the function descriptor and the
4605 function entry symbol is used. */
4606
4607 static bfd_boolean
4608 add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info)
4609 {
4610 struct ppc_link_hash_table *htab;
4611 struct ppc_link_hash_entry *fdh;
4612
4613 if (eh->elf.root.type == bfd_link_hash_indirect)
4614 return TRUE;
4615
4616 if (eh->elf.root.type == bfd_link_hash_warning)
4617 eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link;
4618
4619 if (eh->elf.root.root.string[0] != '.')
4620 abort ();
4621
4622 htab = ppc_hash_table (info);
4623 if (htab == NULL)
4624 return FALSE;
4625
4626 fdh = lookup_fdh (eh, htab);
4627 if (fdh == NULL)
4628 {
4629 if (!info->relocatable
4630 && (eh->elf.root.type == bfd_link_hash_undefined
4631 || eh->elf.root.type == bfd_link_hash_undefweak)
4632 && eh->elf.ref_regular)
4633 {
4634 /* Make an undefweak function descriptor sym, which is enough to
4635 pull in an --as-needed shared lib, but won't cause link
4636 errors. Archives are handled elsewhere. */
4637 fdh = make_fdh (info, eh);
4638 if (fdh == NULL)
4639 return FALSE;
4640 fdh->elf.ref_regular = 1;
4641 }
4642 }
4643 else
4644 {
4645 unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1;
4646 unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1;
4647 if (entry_vis < descr_vis)
4648 fdh->elf.other += entry_vis - descr_vis;
4649 else if (entry_vis > descr_vis)
4650 eh->elf.other += descr_vis - entry_vis;
4651
4652 if ((fdh->elf.root.type == bfd_link_hash_defined
4653 || fdh->elf.root.type == bfd_link_hash_defweak)
4654 && eh->elf.root.type == bfd_link_hash_undefined)
4655 {
4656 eh->elf.root.type = bfd_link_hash_undefweak;
4657 eh->was_undefined = 1;
4658 htab->twiddled_syms = 1;
4659 }
4660 }
4661
4662 return TRUE;
4663 }
4664
4665 /* Process list of dot-symbols we made in link_hash_newfunc. */
4666
4667 static bfd_boolean
4668 ppc64_elf_process_dot_syms (bfd *ibfd, struct bfd_link_info *info)
4669 {
4670 struct ppc_link_hash_table *htab;
4671 struct ppc_link_hash_entry **p, *eh;
4672
4673 if (!is_ppc64_elf (info->output_bfd))
4674 return TRUE;
4675 htab = ppc_hash_table (info);
4676 if (htab == NULL)
4677 return FALSE;
4678
4679 if (is_ppc64_elf (ibfd))
4680 {
4681 p = &htab->dot_syms;
4682 while ((eh = *p) != NULL)
4683 {
4684 *p = NULL;
4685 if (!add_symbol_adjust (eh, info))
4686 return FALSE;
4687 p = &eh->u.next_dot_sym;
4688 }
4689 }
4690
4691 /* Clear the list for non-ppc64 input files. */
4692 p = &htab->dot_syms;
4693 while ((eh = *p) != NULL)
4694 {
4695 *p = NULL;
4696 p = &eh->u.next_dot_sym;
4697 }
4698
4699 /* We need to fix the undefs list for any syms we have twiddled to
4700 undef_weak. */
4701 if (htab->twiddled_syms)
4702 {
4703 bfd_link_repair_undef_list (&htab->elf.root);
4704 htab->twiddled_syms = 0;
4705 }
4706 return TRUE;
4707 }
4708
4709 /* Undo hash table changes when an --as-needed input file is determined
4710 not to be needed. */
4711
4712 static bfd_boolean
4713 ppc64_elf_as_needed_cleanup (bfd *ibfd ATTRIBUTE_UNUSED,
4714 struct bfd_link_info *info)
4715 {
4716 struct ppc_link_hash_table *htab = ppc_hash_table (info);
4717
4718 if (htab == NULL)
4719 return FALSE;
4720
4721 htab->dot_syms = NULL;
4722 return TRUE;
4723 }
4724
4725 /* If --just-symbols against a final linked binary, then assume we need
4726 toc adjusting stubs when calling functions defined there. */
4727
4728 static void
4729 ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
4730 {
4731 if ((sec->flags & SEC_CODE) != 0
4732 && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0
4733 && is_ppc64_elf (sec->owner))
4734 {
4735 asection *got = bfd_get_section_by_name (sec->owner, ".got");
4736 if (got != NULL
4737 && got->size >= elf_backend_got_header_size
4738 && bfd_get_section_by_name (sec->owner, ".opd") != NULL)
4739 sec->has_toc_reloc = 1;
4740 }
4741 _bfd_elf_link_just_syms (sec, info);
4742 }
4743
4744 static struct plt_entry **
4745 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
4746 unsigned long r_symndx, bfd_vma r_addend, int tls_type)
4747 {
4748 struct got_entry **local_got_ents = elf_local_got_ents (abfd);
4749 struct plt_entry **local_plt;
4750 unsigned char *local_got_tls_masks;
4751
4752 if (local_got_ents == NULL)
4753 {
4754 bfd_size_type size = symtab_hdr->sh_info;
4755
4756 size *= (sizeof (*local_got_ents)
4757 + sizeof (*local_plt)
4758 + sizeof (*local_got_tls_masks));
4759 local_got_ents = bfd_zalloc (abfd, size);
4760 if (local_got_ents == NULL)
4761 return NULL;
4762 elf_local_got_ents (abfd) = local_got_ents;
4763 }
4764
4765 if ((tls_type & (PLT_IFUNC | TLS_EXPLICIT)) == 0)
4766 {
4767 struct got_entry *ent;
4768
4769 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next)
4770 if (ent->addend == r_addend
4771 && ent->owner == abfd
4772 && ent->tls_type == tls_type)
4773 break;
4774 if (ent == NULL)
4775 {
4776 bfd_size_type amt = sizeof (*ent);
4777 ent = bfd_alloc (abfd, amt);
4778 if (ent == NULL)
4779 return FALSE;
4780 ent->next = local_got_ents[r_symndx];
4781 ent->addend = r_addend;
4782 ent->owner = abfd;
4783 ent->tls_type = tls_type;
4784 ent->is_indirect = FALSE;
4785 ent->got.refcount = 0;
4786 local_got_ents[r_symndx] = ent;
4787 }
4788 ent->got.refcount += 1;
4789 }
4790
4791 local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info);
4792 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
4793 local_got_tls_masks[r_symndx] |= tls_type;
4794
4795 return local_plt + r_symndx;
4796 }
4797
4798 static bfd_boolean
4799 update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend)
4800 {
4801 struct plt_entry *ent;
4802
4803 for (ent = *plist; ent != NULL; ent = ent->next)
4804 if (ent->addend == addend)
4805 break;
4806 if (ent == NULL)
4807 {
4808 bfd_size_type amt = sizeof (*ent);
4809 ent = bfd_alloc (abfd, amt);
4810 if (ent == NULL)
4811 return FALSE;
4812 ent->next = *plist;
4813 ent->addend = addend;
4814 ent->plt.refcount = 0;
4815 *plist = ent;
4816 }
4817 ent->plt.refcount += 1;
4818 return TRUE;
4819 }
4820
4821 static bfd_boolean
4822 is_branch_reloc (enum elf_ppc64_reloc_type r_type)
4823 {
4824 return (r_type == R_PPC64_REL24
4825 || r_type == R_PPC64_REL14
4826 || r_type == R_PPC64_REL14_BRTAKEN
4827 || r_type == R_PPC64_REL14_BRNTAKEN
4828 || r_type == R_PPC64_ADDR24
4829 || r_type == R_PPC64_ADDR14
4830 || r_type == R_PPC64_ADDR14_BRTAKEN
4831 || r_type == R_PPC64_ADDR14_BRNTAKEN);
4832 }
4833
4834 /* Look through the relocs for a section during the first phase, and
4835 calculate needed space in the global offset table, procedure
4836 linkage table, and dynamic reloc sections. */
4837
4838 static bfd_boolean
4839 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
4840 asection *sec, const Elf_Internal_Rela *relocs)
4841 {
4842 struct ppc_link_hash_table *htab;
4843 Elf_Internal_Shdr *symtab_hdr;
4844 struct elf_link_hash_entry **sym_hashes;
4845 const Elf_Internal_Rela *rel;
4846 const Elf_Internal_Rela *rel_end;
4847 asection *sreloc;
4848 asection **opd_sym_map;
4849 struct elf_link_hash_entry *tga, *dottga;
4850
4851 if (info->relocatable)
4852 return TRUE;
4853
4854 /* Don't do anything special with non-loaded, non-alloced sections.
4855 In particular, any relocs in such sections should not affect GOT
4856 and PLT reference counting (ie. we don't allow them to create GOT
4857 or PLT entries), there's no possibility or desire to optimize TLS
4858 relocs, and there's not much point in propagating relocs to shared
4859 libs that the dynamic linker won't relocate. */
4860 if ((sec->flags & SEC_ALLOC) == 0)
4861 return TRUE;
4862
4863 BFD_ASSERT (is_ppc64_elf (abfd));
4864
4865 htab = ppc_hash_table (info);
4866 if (htab == NULL)
4867 return FALSE;
4868
4869 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4870 FALSE, FALSE, TRUE);
4871 dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
4872 FALSE, FALSE, TRUE);
4873 symtab_hdr = &elf_symtab_hdr (abfd);
4874 sym_hashes = elf_sym_hashes (abfd);
4875 sreloc = NULL;
4876 opd_sym_map = NULL;
4877 if (strcmp (sec->name, ".opd") == 0)
4878 {
4879 /* Garbage collection needs some extra help with .opd sections.
4880 We don't want to necessarily keep everything referenced by
4881 relocs in .opd, as that would keep all functions. Instead,
4882 if we reference an .opd symbol (a function descriptor), we
4883 want to keep the function code symbol's section. This is
4884 easy for global symbols, but for local syms we need to keep
4885 information about the associated function section. */
4886 bfd_size_type amt;
4887
4888 amt = sec->size * sizeof (*opd_sym_map) / 8;
4889 opd_sym_map = bfd_zalloc (abfd, amt);
4890 if (opd_sym_map == NULL)
4891 return FALSE;
4892 ppc64_elf_section_data (sec)->u.opd.func_sec = opd_sym_map;
4893 BFD_ASSERT (ppc64_elf_section_data (sec)->sec_type == sec_normal);
4894 ppc64_elf_section_data (sec)->sec_type = sec_opd;
4895 }
4896
4897 if (htab->sfpr == NULL
4898 && !create_linkage_sections (htab->elf.dynobj, info))
4899 return FALSE;
4900
4901 rel_end = relocs + sec->reloc_count;
4902 for (rel = relocs; rel < rel_end; rel++)
4903 {
4904 unsigned long r_symndx;
4905 struct elf_link_hash_entry *h;
4906 enum elf_ppc64_reloc_type r_type;
4907 int tls_type;
4908 struct _ppc64_elf_section_data *ppc64_sec;
4909 struct plt_entry **ifunc;
4910
4911 r_symndx = ELF64_R_SYM (rel->r_info);
4912 if (r_symndx < symtab_hdr->sh_info)
4913 h = NULL;
4914 else
4915 {
4916 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4917 h = elf_follow_link (h);
4918 }
4919
4920 tls_type = 0;
4921 ifunc = NULL;
4922 if (h != NULL)
4923 {
4924 if (h->type == STT_GNU_IFUNC)
4925 {
4926 h->needs_plt = 1;
4927 ifunc = &h->plt.plist;
4928 }
4929 }
4930 else
4931 {
4932 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4933 abfd, r_symndx);
4934 if (isym == NULL)
4935 return FALSE;
4936
4937 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4938 {
4939 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4940 rel->r_addend, PLT_IFUNC);
4941 if (ifunc == NULL)
4942 return FALSE;
4943 }
4944 }
4945 r_type = ELF64_R_TYPE (rel->r_info);
4946 if (is_branch_reloc (r_type))
4947 {
4948 if (h != NULL && (h == tga || h == dottga))
4949 {
4950 if (rel != relocs
4951 && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD
4952 || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD))
4953 /* We have a new-style __tls_get_addr call with a marker
4954 reloc. */
4955 ;
4956 else
4957 /* Mark this section as having an old-style call. */
4958 sec->has_tls_get_addr_call = 1;
4959 }
4960
4961 /* STT_GNU_IFUNC symbols must have a PLT entry. */
4962 if (ifunc != NULL
4963 && !update_plt_info (abfd, ifunc, rel->r_addend))
4964 return FALSE;
4965 }
4966
4967 switch (r_type)
4968 {
4969 case R_PPC64_TLSGD:
4970 case R_PPC64_TLSLD:
4971 /* These special tls relocs tie a call to __tls_get_addr with
4972 its parameter symbol. */
4973 break;
4974
4975 case R_PPC64_GOT_TLSLD16:
4976 case R_PPC64_GOT_TLSLD16_LO:
4977 case R_PPC64_GOT_TLSLD16_HI:
4978 case R_PPC64_GOT_TLSLD16_HA:
4979 tls_type = TLS_TLS | TLS_LD;
4980 goto dogottls;
4981
4982 case R_PPC64_GOT_TLSGD16:
4983 case R_PPC64_GOT_TLSGD16_LO:
4984 case R_PPC64_GOT_TLSGD16_HI:
4985 case R_PPC64_GOT_TLSGD16_HA:
4986 tls_type = TLS_TLS | TLS_GD;
4987 goto dogottls;
4988
4989 case R_PPC64_GOT_TPREL16_DS:
4990 case R_PPC64_GOT_TPREL16_LO_DS:
4991 case R_PPC64_GOT_TPREL16_HI:
4992 case R_PPC64_GOT_TPREL16_HA:
4993 if (!info->executable)
4994 info->flags |= DF_STATIC_TLS;
4995 tls_type = TLS_TLS | TLS_TPREL;
4996 goto dogottls;
4997
4998 case R_PPC64_GOT_DTPREL16_DS:
4999 case R_PPC64_GOT_DTPREL16_LO_DS:
5000 case R_PPC64_GOT_DTPREL16_HI:
5001 case R_PPC64_GOT_DTPREL16_HA:
5002 tls_type = TLS_TLS | TLS_DTPREL;
5003 dogottls:
5004 sec->has_tls_reloc = 1;
5005 /* Fall thru */
5006
5007 case R_PPC64_GOT16:
5008 case R_PPC64_GOT16_DS:
5009 case R_PPC64_GOT16_HA:
5010 case R_PPC64_GOT16_HI:
5011 case R_PPC64_GOT16_LO:
5012 case R_PPC64_GOT16_LO_DS:
5013 /* This symbol requires a global offset table entry. */
5014 sec->has_toc_reloc = 1;
5015 if (r_type == R_PPC64_GOT_TLSLD16
5016 || r_type == R_PPC64_GOT_TLSGD16
5017 || r_type == R_PPC64_GOT_TPREL16_DS
5018 || r_type == R_PPC64_GOT_DTPREL16_DS
5019 || r_type == R_PPC64_GOT16
5020 || r_type == R_PPC64_GOT16_DS)
5021 {
5022 htab->do_multi_toc = 1;
5023 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5024 }
5025
5026 if (ppc64_elf_tdata (abfd)->got == NULL
5027 && !create_got_section (abfd, info))
5028 return FALSE;
5029
5030 if (h != NULL)
5031 {
5032 struct ppc_link_hash_entry *eh;
5033 struct got_entry *ent;
5034
5035 eh = (struct ppc_link_hash_entry *) h;
5036 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next)
5037 if (ent->addend == rel->r_addend
5038 && ent->owner == abfd
5039 && ent->tls_type == tls_type)
5040 break;
5041 if (ent == NULL)
5042 {
5043 bfd_size_type amt = sizeof (*ent);
5044 ent = bfd_alloc (abfd, amt);
5045 if (ent == NULL)
5046 return FALSE;
5047 ent->next = eh->elf.got.glist;
5048 ent->addend = rel->r_addend;
5049 ent->owner = abfd;
5050 ent->tls_type = tls_type;
5051 ent->is_indirect = FALSE;
5052 ent->got.refcount = 0;
5053 eh->elf.got.glist = ent;
5054 }
5055 ent->got.refcount += 1;
5056 eh->tls_mask |= tls_type;
5057 }
5058 else
5059 /* This is a global offset table entry for a local symbol. */
5060 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5061 rel->r_addend, tls_type))
5062 return FALSE;
5063 break;
5064
5065 case R_PPC64_PLT16_HA:
5066 case R_PPC64_PLT16_HI:
5067 case R_PPC64_PLT16_LO:
5068 case R_PPC64_PLT32:
5069 case R_PPC64_PLT64:
5070 /* This symbol requires a procedure linkage table entry. We
5071 actually build the entry in adjust_dynamic_symbol,
5072 because this might be a case of linking PIC code without
5073 linking in any dynamic objects, in which case we don't
5074 need to generate a procedure linkage table after all. */
5075 if (h == NULL)
5076 {
5077 /* It does not make sense to have a procedure linkage
5078 table entry for a local symbol. */
5079 bfd_set_error (bfd_error_bad_value);
5080 return FALSE;
5081 }
5082 else
5083 {
5084 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5085 return FALSE;
5086 h->needs_plt = 1;
5087 if (h->root.root.string[0] == '.'
5088 && h->root.root.string[1] != '\0')
5089 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5090 }
5091 break;
5092
5093 /* The following relocations don't need to propagate the
5094 relocation if linking a shared object since they are
5095 section relative. */
5096 case R_PPC64_SECTOFF:
5097 case R_PPC64_SECTOFF_LO:
5098 case R_PPC64_SECTOFF_HI:
5099 case R_PPC64_SECTOFF_HA:
5100 case R_PPC64_SECTOFF_DS:
5101 case R_PPC64_SECTOFF_LO_DS:
5102 case R_PPC64_DTPREL16:
5103 case R_PPC64_DTPREL16_LO:
5104 case R_PPC64_DTPREL16_HI:
5105 case R_PPC64_DTPREL16_HA:
5106 case R_PPC64_DTPREL16_DS:
5107 case R_PPC64_DTPREL16_LO_DS:
5108 case R_PPC64_DTPREL16_HIGHER:
5109 case R_PPC64_DTPREL16_HIGHERA:
5110 case R_PPC64_DTPREL16_HIGHEST:
5111 case R_PPC64_DTPREL16_HIGHESTA:
5112 break;
5113
5114 /* Nor do these. */
5115 case R_PPC64_REL16:
5116 case R_PPC64_REL16_LO:
5117 case R_PPC64_REL16_HI:
5118 case R_PPC64_REL16_HA:
5119 break;
5120
5121 case R_PPC64_TOC16:
5122 case R_PPC64_TOC16_DS:
5123 htab->do_multi_toc = 1;
5124 ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1;
5125 case R_PPC64_TOC16_LO:
5126 case R_PPC64_TOC16_HI:
5127 case R_PPC64_TOC16_HA:
5128 case R_PPC64_TOC16_LO_DS:
5129 sec->has_toc_reloc = 1;
5130 break;
5131
5132 /* This relocation describes the C++ object vtable hierarchy.
5133 Reconstruct it for later use during GC. */
5134 case R_PPC64_GNU_VTINHERIT:
5135 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
5136 return FALSE;
5137 break;
5138
5139 /* This relocation describes which C++ vtable entries are actually
5140 used. Record for later use during GC. */
5141 case R_PPC64_GNU_VTENTRY:
5142 BFD_ASSERT (h != NULL);
5143 if (h != NULL
5144 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
5145 return FALSE;
5146 break;
5147
5148 case R_PPC64_REL14:
5149 case R_PPC64_REL14_BRTAKEN:
5150 case R_PPC64_REL14_BRNTAKEN:
5151 {
5152 asection *dest = NULL;
5153
5154 /* Heuristic: If jumping outside our section, chances are
5155 we are going to need a stub. */
5156 if (h != NULL)
5157 {
5158 /* If the sym is weak it may be overridden later, so
5159 don't assume we know where a weak sym lives. */
5160 if (h->root.type == bfd_link_hash_defined)
5161 dest = h->root.u.def.section;
5162 }
5163 else
5164 {
5165 Elf_Internal_Sym *isym;
5166
5167 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5168 abfd, r_symndx);
5169 if (isym == NULL)
5170 return FALSE;
5171
5172 dest = bfd_section_from_elf_index (abfd, isym->st_shndx);
5173 }
5174
5175 if (dest != sec)
5176 ppc64_elf_section_data (sec)->has_14bit_branch = 1;
5177 }
5178 /* Fall through. */
5179
5180 case R_PPC64_REL24:
5181 if (h != NULL && ifunc == NULL)
5182 {
5183 /* We may need a .plt entry if the function this reloc
5184 refers to is in a shared lib. */
5185 if (!update_plt_info (abfd, &h->plt.plist, rel->r_addend))
5186 return FALSE;
5187 h->needs_plt = 1;
5188 if (h->root.root.string[0] == '.'
5189 && h->root.root.string[1] != '\0')
5190 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5191 if (h == tga || h == dottga)
5192 sec->has_tls_reloc = 1;
5193 }
5194 break;
5195
5196 case R_PPC64_TPREL64:
5197 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL;
5198 if (!info->executable)
5199 info->flags |= DF_STATIC_TLS;
5200 goto dotlstoc;
5201
5202 case R_PPC64_DTPMOD64:
5203 if (rel + 1 < rel_end
5204 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
5205 && rel[1].r_offset == rel->r_offset + 8)
5206 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD;
5207 else
5208 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD;
5209 goto dotlstoc;
5210
5211 case R_PPC64_DTPREL64:
5212 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL;
5213 if (rel != relocs
5214 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64)
5215 && rel[-1].r_offset == rel->r_offset - 8)
5216 /* This is the second reloc of a dtpmod, dtprel pair.
5217 Don't mark with TLS_DTPREL. */
5218 goto dodyn;
5219
5220 dotlstoc:
5221 sec->has_tls_reloc = 1;
5222 if (h != NULL)
5223 {
5224 struct ppc_link_hash_entry *eh;
5225 eh = (struct ppc_link_hash_entry *) h;
5226 eh->tls_mask |= tls_type;
5227 }
5228 else
5229 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
5230 rel->r_addend, tls_type))
5231 return FALSE;
5232
5233 ppc64_sec = ppc64_elf_section_data (sec);
5234 if (ppc64_sec->sec_type != sec_toc)
5235 {
5236 bfd_size_type amt;
5237
5238 /* One extra to simplify get_tls_mask. */
5239 amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned);
5240 ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt);
5241 if (ppc64_sec->u.toc.symndx == NULL)
5242 return FALSE;
5243 amt = sec->size * sizeof (bfd_vma) / 8;
5244 ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt);
5245 if (ppc64_sec->u.toc.add == NULL)
5246 return FALSE;
5247 BFD_ASSERT (ppc64_sec->sec_type == sec_normal);
5248 ppc64_sec->sec_type = sec_toc;
5249 }
5250 BFD_ASSERT (rel->r_offset % 8 == 0);
5251 ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx;
5252 ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend;
5253
5254 /* Mark the second slot of a GD or LD entry.
5255 -1 to indicate GD and -2 to indicate LD. */
5256 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD))
5257 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1;
5258 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD))
5259 ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2;
5260 goto dodyn;
5261
5262 case R_PPC64_TPREL16:
5263 case R_PPC64_TPREL16_LO:
5264 case R_PPC64_TPREL16_HI:
5265 case R_PPC64_TPREL16_HA:
5266 case R_PPC64_TPREL16_DS:
5267 case R_PPC64_TPREL16_LO_DS:
5268 case R_PPC64_TPREL16_HIGHER:
5269 case R_PPC64_TPREL16_HIGHERA:
5270 case R_PPC64_TPREL16_HIGHEST:
5271 case R_PPC64_TPREL16_HIGHESTA:
5272 if (info->shared)
5273 {
5274 if (!info->executable)
5275 info->flags |= DF_STATIC_TLS;
5276 goto dodyn;
5277 }
5278 break;
5279
5280 case R_PPC64_ADDR64:
5281 if (opd_sym_map != NULL
5282 && rel + 1 < rel_end
5283 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC)
5284 {
5285 if (h != NULL)
5286 {
5287 if (h->root.root.string[0] == '.'
5288 && h->root.root.string[1] != 0
5289 && lookup_fdh ((struct ppc_link_hash_entry *) h, htab))
5290 ;
5291 else
5292 ((struct ppc_link_hash_entry *) h)->is_func = 1;
5293 }
5294 else
5295 {
5296 asection *s;
5297 Elf_Internal_Sym *isym;
5298
5299 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5300 abfd, r_symndx);
5301 if (isym == NULL)
5302 return FALSE;
5303
5304 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5305 if (s != NULL && s != sec)
5306 opd_sym_map[rel->r_offset / 8] = s;
5307 }
5308 }
5309 /* Fall through. */
5310
5311 case R_PPC64_REL30:
5312 case R_PPC64_REL32:
5313 case R_PPC64_REL64:
5314 case R_PPC64_ADDR14:
5315 case R_PPC64_ADDR14_BRNTAKEN:
5316 case R_PPC64_ADDR14_BRTAKEN:
5317 case R_PPC64_ADDR16:
5318 case R_PPC64_ADDR16_DS:
5319 case R_PPC64_ADDR16_HA:
5320 case R_PPC64_ADDR16_HI:
5321 case R_PPC64_ADDR16_HIGHER:
5322 case R_PPC64_ADDR16_HIGHERA:
5323 case R_PPC64_ADDR16_HIGHEST:
5324 case R_PPC64_ADDR16_HIGHESTA:
5325 case R_PPC64_ADDR16_LO:
5326 case R_PPC64_ADDR16_LO_DS:
5327 case R_PPC64_ADDR24:
5328 case R_PPC64_ADDR32:
5329 case R_PPC64_UADDR16:
5330 case R_PPC64_UADDR32:
5331 case R_PPC64_UADDR64:
5332 case R_PPC64_TOC:
5333 if (h != NULL && !info->shared)
5334 /* We may need a copy reloc. */
5335 h->non_got_ref = 1;
5336
5337 /* Don't propagate .opd relocs. */
5338 if (NO_OPD_RELOCS && opd_sym_map != NULL)
5339 break;
5340
5341 /* If we are creating a shared library, and this is a reloc
5342 against a global symbol, or a non PC relative reloc
5343 against a local symbol, then we need to copy the reloc
5344 into the shared library. However, if we are linking with
5345 -Bsymbolic, we do not need to copy a reloc against a
5346 global symbol which is defined in an object we are
5347 including in the link (i.e., DEF_REGULAR is set). At
5348 this point we have not seen all the input files, so it is
5349 possible that DEF_REGULAR is not set now but will be set
5350 later (it is never cleared). In case of a weak definition,
5351 DEF_REGULAR may be cleared later by a strong definition in
5352 a shared library. We account for that possibility below by
5353 storing information in the dyn_relocs field of the hash
5354 table entry. A similar situation occurs when creating
5355 shared libraries and symbol visibility changes render the
5356 symbol local.
5357
5358 If on the other hand, we are creating an executable, we
5359 may need to keep relocations for symbols satisfied by a
5360 dynamic library if we manage to avoid copy relocs for the
5361 symbol. */
5362 dodyn:
5363 if ((info->shared
5364 && (must_be_dyn_reloc (info, r_type)
5365 || (h != NULL
5366 && (! info->symbolic
5367 || h->root.type == bfd_link_hash_defweak
5368 || !h->def_regular))))
5369 || (ELIMINATE_COPY_RELOCS
5370 && !info->shared
5371 && h != NULL
5372 && (h->root.type == bfd_link_hash_defweak
5373 || !h->def_regular))
5374 || (!info->shared
5375 && ifunc != NULL))
5376 {
5377 struct elf_dyn_relocs *p;
5378 struct elf_dyn_relocs **head;
5379
5380 /* We must copy these reloc types into the output file.
5381 Create a reloc section in dynobj and make room for
5382 this reloc. */
5383 if (sreloc == NULL)
5384 {
5385 sreloc = _bfd_elf_make_dynamic_reloc_section
5386 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
5387
5388 if (sreloc == NULL)
5389 return FALSE;
5390 }
5391
5392 /* If this is a global symbol, we count the number of
5393 relocations we need for this symbol. */
5394 if (h != NULL)
5395 {
5396 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
5397 }
5398 else
5399 {
5400 /* Track dynamic relocs needed for local syms too.
5401 We really need local syms available to do this
5402 easily. Oh well. */
5403 asection *s;
5404 void *vpp;
5405 Elf_Internal_Sym *isym;
5406
5407 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5408 abfd, r_symndx);
5409 if (isym == NULL)
5410 return FALSE;
5411
5412 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5413 if (s == NULL)
5414 s = sec;
5415
5416 vpp = &elf_section_data (s)->local_dynrel;
5417 head = (struct elf_dyn_relocs **) vpp;
5418 }
5419
5420 p = *head;
5421 if (p == NULL || p->sec != sec)
5422 {
5423 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
5424 if (p == NULL)
5425 return FALSE;
5426 p->next = *head;
5427 *head = p;
5428 p->sec = sec;
5429 p->count = 0;
5430 p->pc_count = 0;
5431 }
5432
5433 p->count += 1;
5434 if (!must_be_dyn_reloc (info, r_type))
5435 p->pc_count += 1;
5436 }
5437 break;
5438
5439 default:
5440 break;
5441 }
5442 }
5443
5444 return TRUE;
5445 }
5446
5447 /* OFFSET in OPD_SEC specifies a function descriptor. Return the address
5448 of the code entry point, and its section. */
5449
5450 static bfd_vma
5451 opd_entry_value (asection *opd_sec,
5452 bfd_vma offset,
5453 asection **code_sec,
5454 bfd_vma *code_off)
5455 {
5456 bfd *opd_bfd = opd_sec->owner;
5457 Elf_Internal_Rela *relocs;
5458 Elf_Internal_Rela *lo, *hi, *look;
5459 bfd_vma val;
5460
5461 /* No relocs implies we are linking a --just-symbols object. */
5462 if (opd_sec->reloc_count == 0)
5463 {
5464 char buf[8];
5465
5466 if (!bfd_get_section_contents (opd_bfd, opd_sec, buf, offset, 8))
5467 return (bfd_vma) -1;
5468
5469 val = bfd_get_64 (opd_bfd, buf);
5470 if (code_sec != NULL)
5471 {
5472 asection *sec, *likely = NULL;
5473 for (sec = opd_bfd->sections; sec != NULL; sec = sec->next)
5474 if (sec->vma <= val
5475 && (sec->flags & SEC_LOAD) != 0
5476 && (sec->flags & SEC_ALLOC) != 0)
5477 likely = sec;
5478 if (likely != NULL)
5479 {
5480 *code_sec = likely;
5481 if (code_off != NULL)
5482 *code_off = val - likely->vma;
5483 }
5484 }
5485 return val;
5486 }
5487
5488 BFD_ASSERT (is_ppc64_elf (opd_bfd));
5489
5490 relocs = ppc64_elf_tdata (opd_bfd)->opd_relocs;
5491 if (relocs == NULL)
5492 relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE);
5493
5494 /* Go find the opd reloc at the sym address. */
5495 lo = relocs;
5496 BFD_ASSERT (lo != NULL);
5497 hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */
5498 val = (bfd_vma) -1;
5499 while (lo < hi)
5500 {
5501 look = lo + (hi - lo) / 2;
5502 if (look->r_offset < offset)
5503 lo = look + 1;
5504 else if (look->r_offset > offset)
5505 hi = look;
5506 else
5507 {
5508 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd);
5509
5510 if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64
5511 && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC)
5512 {
5513 unsigned long symndx = ELF64_R_SYM (look->r_info);
5514 asection *sec;
5515
5516 if (symndx < symtab_hdr->sh_info)
5517 {
5518 Elf_Internal_Sym *sym;
5519
5520 sym = (Elf_Internal_Sym *) symtab_hdr->contents;
5521 if (sym == NULL)
5522 {
5523 sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr,
5524 symtab_hdr->sh_info,
5525 0, NULL, NULL, NULL);
5526 if (sym == NULL)
5527 break;
5528 symtab_hdr->contents = (bfd_byte *) sym;
5529 }
5530
5531 sym += symndx;
5532 val = sym->st_value;
5533 sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx);
5534 BFD_ASSERT ((sec->flags & SEC_MERGE) == 0);
5535 }
5536 else
5537 {
5538 struct elf_link_hash_entry **sym_hashes;
5539 struct elf_link_hash_entry *rh;
5540
5541 sym_hashes = elf_sym_hashes (opd_bfd);
5542 rh = sym_hashes[symndx - symtab_hdr->sh_info];
5543 rh = elf_follow_link (rh);
5544 BFD_ASSERT (rh->root.type == bfd_link_hash_defined
5545 || rh->root.type == bfd_link_hash_defweak);
5546 val = rh->root.u.def.value;
5547 sec = rh->root.u.def.section;
5548 }
5549 val += look->r_addend;
5550 if (code_off != NULL)
5551 *code_off = val;
5552 if (code_sec != NULL)
5553 *code_sec = sec;
5554 if (sec != NULL && sec->output_section != NULL)
5555 val += sec->output_section->vma + sec->output_offset;
5556 }
5557 break;
5558 }
5559 }
5560
5561 return val;
5562 }
5563
5564 /* Return true if symbol is defined in a regular object file. */
5565
5566 static bfd_boolean
5567 is_static_defined (struct elf_link_hash_entry *h)
5568 {
5569 return ((h->root.type == bfd_link_hash_defined
5570 || h->root.type == bfd_link_hash_defweak)
5571 && h->root.u.def.section != NULL
5572 && h->root.u.def.section->output_section != NULL);
5573 }
5574
5575 /* If FDH is a function descriptor symbol, return the associated code
5576 entry symbol if it is defined. Return NULL otherwise. */
5577
5578 static struct ppc_link_hash_entry *
5579 defined_code_entry (struct ppc_link_hash_entry *fdh)
5580 {
5581 if (fdh->is_func_descriptor)
5582 {
5583 struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh);
5584 if (fh->elf.root.type == bfd_link_hash_defined
5585 || fh->elf.root.type == bfd_link_hash_defweak)
5586 return fh;
5587 }
5588 return NULL;
5589 }
5590
5591 /* If FH is a function code entry symbol, return the associated
5592 function descriptor symbol if it is defined. Return NULL otherwise. */
5593
5594 static struct ppc_link_hash_entry *
5595 defined_func_desc (struct ppc_link_hash_entry *fh)
5596 {
5597 if (fh->oh != NULL
5598 && fh->oh->is_func_descriptor)
5599 {
5600 struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh);
5601 if (fdh->elf.root.type == bfd_link_hash_defined
5602 || fdh->elf.root.type == bfd_link_hash_defweak)
5603 return fdh;
5604 }
5605 return NULL;
5606 }
5607
5608 /* Mark all our entry sym sections, both opd and code section. */
5609
5610 static void
5611 ppc64_elf_gc_keep (struct bfd_link_info *info)
5612 {
5613 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5614 struct bfd_sym_chain *sym;
5615
5616 if (htab == NULL)
5617 return;
5618
5619 for (sym = info->gc_sym_list; sym != NULL; sym = sym->next)
5620 {
5621 struct ppc_link_hash_entry *eh, *fh;
5622 asection *sec;
5623
5624 eh = (struct ppc_link_hash_entry *)
5625 elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, TRUE);
5626 if (eh == NULL)
5627 continue;
5628 if (eh->elf.root.type != bfd_link_hash_defined
5629 && eh->elf.root.type != bfd_link_hash_defweak)
5630 continue;
5631
5632 fh = defined_code_entry (eh);
5633 if (fh != NULL)
5634 {
5635 sec = fh->elf.root.u.def.section;
5636 sec->flags |= SEC_KEEP;
5637 }
5638 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5639 && opd_entry_value (eh->elf.root.u.def.section,
5640 eh->elf.root.u.def.value,
5641 &sec, NULL) != (bfd_vma) -1)
5642 sec->flags |= SEC_KEEP;
5643
5644 sec = eh->elf.root.u.def.section;
5645 sec->flags |= SEC_KEEP;
5646 }
5647 }
5648
5649 /* Mark sections containing dynamically referenced symbols. When
5650 building shared libraries, we must assume that any visible symbol is
5651 referenced. */
5652
5653 static bfd_boolean
5654 ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf)
5655 {
5656 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5657 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
5658 struct ppc_link_hash_entry *fdh;
5659
5660 /* Dynamic linking info is on the func descriptor sym. */
5661 fdh = defined_func_desc (eh);
5662 if (fdh != NULL)
5663 eh = fdh;
5664
5665 if ((eh->elf.root.type == bfd_link_hash_defined
5666 || eh->elf.root.type == bfd_link_hash_defweak)
5667 && (eh->elf.ref_dynamic
5668 || (!info->executable
5669 && eh->elf.def_regular
5670 && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL
5671 && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN)))
5672 {
5673 asection *code_sec;
5674 struct ppc_link_hash_entry *fh;
5675
5676 eh->elf.root.u.def.section->flags |= SEC_KEEP;
5677
5678 /* Function descriptor syms cause the associated
5679 function code sym section to be marked. */
5680 fh = defined_code_entry (eh);
5681 if (fh != NULL)
5682 {
5683 code_sec = fh->elf.root.u.def.section;
5684 code_sec->flags |= SEC_KEEP;
5685 }
5686 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5687 && opd_entry_value (eh->elf.root.u.def.section,
5688 eh->elf.root.u.def.value,
5689 &code_sec, NULL) != (bfd_vma) -1)
5690 code_sec->flags |= SEC_KEEP;
5691 }
5692
5693 return TRUE;
5694 }
5695
5696 /* Return the section that should be marked against GC for a given
5697 relocation. */
5698
5699 static asection *
5700 ppc64_elf_gc_mark_hook (asection *sec,
5701 struct bfd_link_info *info,
5702 Elf_Internal_Rela *rel,
5703 struct elf_link_hash_entry *h,
5704 Elf_Internal_Sym *sym)
5705 {
5706 asection *rsec;
5707
5708 /* Syms return NULL if we're marking .opd, so we avoid marking all
5709 function sections, as all functions are referenced in .opd. */
5710 rsec = NULL;
5711 if (get_opd_info (sec) != NULL)
5712 return rsec;
5713
5714 if (h != NULL)
5715 {
5716 enum elf_ppc64_reloc_type r_type;
5717 struct ppc_link_hash_entry *eh, *fh, *fdh;
5718
5719 r_type = ELF64_R_TYPE (rel->r_info);
5720 switch (r_type)
5721 {
5722 case R_PPC64_GNU_VTINHERIT:
5723 case R_PPC64_GNU_VTENTRY:
5724 break;
5725
5726 default:
5727 switch (h->root.type)
5728 {
5729 case bfd_link_hash_defined:
5730 case bfd_link_hash_defweak:
5731 eh = (struct ppc_link_hash_entry *) h;
5732 fdh = defined_func_desc (eh);
5733 if (fdh != NULL)
5734 eh = fdh;
5735
5736 /* Function descriptor syms cause the associated
5737 function code sym section to be marked. */
5738 fh = defined_code_entry (eh);
5739 if (fh != NULL)
5740 {
5741 /* They also mark their opd section. */
5742 eh->elf.root.u.def.section->gc_mark = 1;
5743
5744 rsec = fh->elf.root.u.def.section;
5745 }
5746 else if (get_opd_info (eh->elf.root.u.def.section) != NULL
5747 && opd_entry_value (eh->elf.root.u.def.section,
5748 eh->elf.root.u.def.value,
5749 &rsec, NULL) != (bfd_vma) -1)
5750 eh->elf.root.u.def.section->gc_mark = 1;
5751 else
5752 rsec = h->root.u.def.section;
5753 break;
5754
5755 case bfd_link_hash_common:
5756 rsec = h->root.u.c.p->section;
5757 break;
5758
5759 default:
5760 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5761 }
5762 }
5763 }
5764 else
5765 {
5766 struct _opd_sec_data *opd;
5767
5768 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
5769 opd = get_opd_info (rsec);
5770 if (opd != NULL && opd->func_sec != NULL)
5771 {
5772 rsec->gc_mark = 1;
5773
5774 rsec = opd->func_sec[(sym->st_value + rel->r_addend) / 8];
5775 }
5776 }
5777
5778 return rsec;
5779 }
5780
5781 /* Update the .got, .plt. and dynamic reloc reference counts for the
5782 section being removed. */
5783
5784 static bfd_boolean
5785 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
5786 asection *sec, const Elf_Internal_Rela *relocs)
5787 {
5788 struct ppc_link_hash_table *htab;
5789 Elf_Internal_Shdr *symtab_hdr;
5790 struct elf_link_hash_entry **sym_hashes;
5791 struct got_entry **local_got_ents;
5792 const Elf_Internal_Rela *rel, *relend;
5793
5794 if (info->relocatable)
5795 return TRUE;
5796
5797 if ((sec->flags & SEC_ALLOC) == 0)
5798 return TRUE;
5799
5800 elf_section_data (sec)->local_dynrel = NULL;
5801
5802 htab = ppc_hash_table (info);
5803 if (htab == NULL)
5804 return FALSE;
5805
5806 symtab_hdr = &elf_symtab_hdr (abfd);
5807 sym_hashes = elf_sym_hashes (abfd);
5808 local_got_ents = elf_local_got_ents (abfd);
5809
5810 relend = relocs + sec->reloc_count;
5811 for (rel = relocs; rel < relend; rel++)
5812 {
5813 unsigned long r_symndx;
5814 enum elf_ppc64_reloc_type r_type;
5815 struct elf_link_hash_entry *h = NULL;
5816 unsigned char tls_type = 0;
5817
5818 r_symndx = ELF64_R_SYM (rel->r_info);
5819 r_type = ELF64_R_TYPE (rel->r_info);
5820 if (r_symndx >= symtab_hdr->sh_info)
5821 {
5822 struct ppc_link_hash_entry *eh;
5823 struct elf_dyn_relocs **pp;
5824 struct elf_dyn_relocs *p;
5825
5826 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5827 h = elf_follow_link (h);
5828 eh = (struct ppc_link_hash_entry *) h;
5829
5830 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5831 if (p->sec == sec)
5832 {
5833 /* Everything must go for SEC. */
5834 *pp = p->next;
5835 break;
5836 }
5837 }
5838
5839 if (is_branch_reloc (r_type))
5840 {
5841 struct plt_entry **ifunc = NULL;
5842 if (h != NULL)
5843 {
5844 if (h->type == STT_GNU_IFUNC)
5845 ifunc = &h->plt.plist;
5846 }
5847 else if (local_got_ents != NULL)
5848 {
5849 struct plt_entry **local_plt = (struct plt_entry **)
5850 (local_got_ents + symtab_hdr->sh_info);
5851 unsigned char *local_got_tls_masks = (unsigned char *)
5852 (local_plt + symtab_hdr->sh_info);
5853 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5854 ifunc = local_plt + r_symndx;
5855 }
5856 if (ifunc != NULL)
5857 {
5858 struct plt_entry *ent;
5859
5860 for (ent = *ifunc; ent != NULL; ent = ent->next)
5861 if (ent->addend == rel->r_addend)
5862 break;
5863 if (ent == NULL)
5864 abort ();
5865 if (ent->plt.refcount > 0)
5866 ent->plt.refcount -= 1;
5867 continue;
5868 }
5869 }
5870
5871 switch (r_type)
5872 {
5873 case R_PPC64_GOT_TLSLD16:
5874 case R_PPC64_GOT_TLSLD16_LO:
5875 case R_PPC64_GOT_TLSLD16_HI:
5876 case R_PPC64_GOT_TLSLD16_HA:
5877 tls_type = TLS_TLS | TLS_LD;
5878 goto dogot;
5879
5880 case R_PPC64_GOT_TLSGD16:
5881 case R_PPC64_GOT_TLSGD16_LO:
5882 case R_PPC64_GOT_TLSGD16_HI:
5883 case R_PPC64_GOT_TLSGD16_HA:
5884 tls_type = TLS_TLS | TLS_GD;
5885 goto dogot;
5886
5887 case R_PPC64_GOT_TPREL16_DS:
5888 case R_PPC64_GOT_TPREL16_LO_DS:
5889 case R_PPC64_GOT_TPREL16_HI:
5890 case R_PPC64_GOT_TPREL16_HA:
5891 tls_type = TLS_TLS | TLS_TPREL;
5892 goto dogot;
5893
5894 case R_PPC64_GOT_DTPREL16_DS:
5895 case R_PPC64_GOT_DTPREL16_LO_DS:
5896 case R_PPC64_GOT_DTPREL16_HI:
5897 case R_PPC64_GOT_DTPREL16_HA:
5898 tls_type = TLS_TLS | TLS_DTPREL;
5899 goto dogot;
5900
5901 case R_PPC64_GOT16:
5902 case R_PPC64_GOT16_DS:
5903 case R_PPC64_GOT16_HA:
5904 case R_PPC64_GOT16_HI:
5905 case R_PPC64_GOT16_LO:
5906 case R_PPC64_GOT16_LO_DS:
5907 dogot:
5908 {
5909 struct got_entry *ent;
5910
5911 if (h != NULL)
5912 ent = h->got.glist;
5913 else
5914 ent = local_got_ents[r_symndx];
5915
5916 for (; ent != NULL; ent = ent->next)
5917 if (ent->addend == rel->r_addend
5918 && ent->owner == abfd
5919 && ent->tls_type == tls_type)
5920 break;
5921 if (ent == NULL)
5922 abort ();
5923 if (ent->got.refcount > 0)
5924 ent->got.refcount -= 1;
5925 }
5926 break;
5927
5928 case R_PPC64_PLT16_HA:
5929 case R_PPC64_PLT16_HI:
5930 case R_PPC64_PLT16_LO:
5931 case R_PPC64_PLT32:
5932 case R_PPC64_PLT64:
5933 case R_PPC64_REL14:
5934 case R_PPC64_REL14_BRNTAKEN:
5935 case R_PPC64_REL14_BRTAKEN:
5936 case R_PPC64_REL24:
5937 if (h != NULL)
5938 {
5939 struct plt_entry *ent;
5940
5941 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5942 if (ent->addend == rel->r_addend)
5943 break;
5944 if (ent != NULL && ent->plt.refcount > 0)
5945 ent->plt.refcount -= 1;
5946 }
5947 break;
5948
5949 default:
5950 break;
5951 }
5952 }
5953 return TRUE;
5954 }
5955
5956 /* The maximum size of .sfpr. */
5957 #define SFPR_MAX (218*4)
5958
5959 struct sfpr_def_parms
5960 {
5961 const char name[12];
5962 unsigned char lo, hi;
5963 bfd_byte * (*write_ent) (bfd *, bfd_byte *, int);
5964 bfd_byte * (*write_tail) (bfd *, bfd_byte *, int);
5965 };
5966
5967 /* Auto-generate _save*, _rest* functions in .sfpr. */
5968
5969 static bfd_boolean
5970 sfpr_define (struct bfd_link_info *info, const struct sfpr_def_parms *parm)
5971 {
5972 struct ppc_link_hash_table *htab = ppc_hash_table (info);
5973 unsigned int i;
5974 size_t len = strlen (parm->name);
5975 bfd_boolean writing = FALSE;
5976 char sym[16];
5977
5978 if (htab == NULL)
5979 return FALSE;
5980
5981 memcpy (sym, parm->name, len);
5982 sym[len + 2] = 0;
5983
5984 for (i = parm->lo; i <= parm->hi; i++)
5985 {
5986 struct elf_link_hash_entry *h;
5987
5988 sym[len + 0] = i / 10 + '0';
5989 sym[len + 1] = i % 10 + '0';
5990 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE);
5991 if (h != NULL
5992 && !h->def_regular)
5993 {
5994 h->root.type = bfd_link_hash_defined;
5995 h->root.u.def.section = htab->sfpr;
5996 h->root.u.def.value = htab->sfpr->size;
5997 h->type = STT_FUNC;
5998 h->def_regular = 1;
5999 _bfd_elf_link_hash_hide_symbol (info, h, TRUE);
6000 writing = TRUE;
6001 if (htab->sfpr->contents == NULL)
6002 {
6003 htab->sfpr->contents = bfd_alloc (htab->elf.dynobj, SFPR_MAX);
6004 if (htab->sfpr->contents == NULL)
6005 return FALSE;
6006 }
6007 }
6008 if (writing)
6009 {
6010 bfd_byte *p = htab->sfpr->contents + htab->sfpr->size;
6011 if (i != parm->hi)
6012 p = (*parm->write_ent) (htab->elf.dynobj, p, i);
6013 else
6014 p = (*parm->write_tail) (htab->elf.dynobj, p, i);
6015 htab->sfpr->size = p - htab->sfpr->contents;
6016 }
6017 }
6018
6019 return TRUE;
6020 }
6021
6022 static bfd_byte *
6023 savegpr0 (bfd *abfd, bfd_byte *p, int r)
6024 {
6025 bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6026 return p + 4;
6027 }
6028
6029 static bfd_byte *
6030 savegpr0_tail (bfd *abfd, bfd_byte *p, int r)
6031 {
6032 p = savegpr0 (abfd, p, r);
6033 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6034 p = p + 4;
6035 bfd_put_32 (abfd, BLR, p);
6036 return p + 4;
6037 }
6038
6039 static bfd_byte *
6040 restgpr0 (bfd *abfd, bfd_byte *p, int r)
6041 {
6042 bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6043 return p + 4;
6044 }
6045
6046 static bfd_byte *
6047 restgpr0_tail (bfd *abfd, bfd_byte *p, int r)
6048 {
6049 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6050 p = p + 4;
6051 p = restgpr0 (abfd, p, r);
6052 bfd_put_32 (abfd, MTLR_R0, p);
6053 p = p + 4;
6054 if (r == 29)
6055 {
6056 p = restgpr0 (abfd, p, 30);
6057 p = restgpr0 (abfd, p, 31);
6058 }
6059 bfd_put_32 (abfd, BLR, p);
6060 return p + 4;
6061 }
6062
6063 static bfd_byte *
6064 savegpr1 (bfd *abfd, bfd_byte *p, int r)
6065 {
6066 bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6067 return p + 4;
6068 }
6069
6070 static bfd_byte *
6071 savegpr1_tail (bfd *abfd, bfd_byte *p, int r)
6072 {
6073 p = savegpr1 (abfd, p, r);
6074 bfd_put_32 (abfd, BLR, p);
6075 return p + 4;
6076 }
6077
6078 static bfd_byte *
6079 restgpr1 (bfd *abfd, bfd_byte *p, int r)
6080 {
6081 bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6082 return p + 4;
6083 }
6084
6085 static bfd_byte *
6086 restgpr1_tail (bfd *abfd, bfd_byte *p, int r)
6087 {
6088 p = restgpr1 (abfd, p, r);
6089 bfd_put_32 (abfd, BLR, p);
6090 return p + 4;
6091 }
6092
6093 static bfd_byte *
6094 savefpr (bfd *abfd, bfd_byte *p, int r)
6095 {
6096 bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6097 return p + 4;
6098 }
6099
6100 static bfd_byte *
6101 savefpr0_tail (bfd *abfd, bfd_byte *p, int r)
6102 {
6103 p = savefpr (abfd, p, r);
6104 bfd_put_32 (abfd, STD_R0_0R1 + 16, p);
6105 p = p + 4;
6106 bfd_put_32 (abfd, BLR, p);
6107 return p + 4;
6108 }
6109
6110 static bfd_byte *
6111 restfpr (bfd *abfd, bfd_byte *p, int r)
6112 {
6113 bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p);
6114 return p + 4;
6115 }
6116
6117 static bfd_byte *
6118 restfpr0_tail (bfd *abfd, bfd_byte *p, int r)
6119 {
6120 bfd_put_32 (abfd, LD_R0_0R1 + 16, p);
6121 p = p + 4;
6122 p = restfpr (abfd, p, r);
6123 bfd_put_32 (abfd, MTLR_R0, p);
6124 p = p + 4;
6125 if (r == 29)
6126 {
6127 p = restfpr (abfd, p, 30);
6128 p = restfpr (abfd, p, 31);
6129 }
6130 bfd_put_32 (abfd, BLR, p);
6131 return p + 4;
6132 }
6133
6134 static bfd_byte *
6135 savefpr1_tail (bfd *abfd, bfd_byte *p, int r)
6136 {
6137 p = savefpr (abfd, p, r);
6138 bfd_put_32 (abfd, BLR, p);
6139 return p + 4;
6140 }
6141
6142 static bfd_byte *
6143 restfpr1_tail (bfd *abfd, bfd_byte *p, int r)
6144 {
6145 p = restfpr (abfd, p, r);
6146 bfd_put_32 (abfd, BLR, p);
6147 return p + 4;
6148 }
6149
6150 static bfd_byte *
6151 savevr (bfd *abfd, bfd_byte *p, int r)
6152 {
6153 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6154 p = p + 4;
6155 bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p);
6156 return p + 4;
6157 }
6158
6159 static bfd_byte *
6160 savevr_tail (bfd *abfd, bfd_byte *p, int r)
6161 {
6162 p = savevr (abfd, p, r);
6163 bfd_put_32 (abfd, BLR, p);
6164 return p + 4;
6165 }
6166
6167 static bfd_byte *
6168 restvr (bfd *abfd, bfd_byte *p, int r)
6169 {
6170 bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p);
6171 p = p + 4;
6172 bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p);
6173 return p + 4;
6174 }
6175
6176 static bfd_byte *
6177 restvr_tail (bfd *abfd, bfd_byte *p, int r)
6178 {
6179 p = restvr (abfd, p, r);
6180 bfd_put_32 (abfd, BLR, p);
6181 return p + 4;
6182 }
6183
6184 /* Called via elf_link_hash_traverse to transfer dynamic linking
6185 information on function code symbol entries to their corresponding
6186 function descriptor symbol entries. */
6187
6188 static bfd_boolean
6189 func_desc_adjust (struct elf_link_hash_entry *h, void *inf)
6190 {
6191 struct bfd_link_info *info;
6192 struct ppc_link_hash_table *htab;
6193 struct plt_entry *ent;
6194 struct ppc_link_hash_entry *fh;
6195 struct ppc_link_hash_entry *fdh;
6196 bfd_boolean force_local;
6197
6198 fh = (struct ppc_link_hash_entry *) h;
6199 if (fh->elf.root.type == bfd_link_hash_indirect)
6200 return TRUE;
6201
6202 info = inf;
6203 htab = ppc_hash_table (info);
6204 if (htab == NULL)
6205 return FALSE;
6206
6207 /* Resolve undefined references to dot-symbols as the value
6208 in the function descriptor, if we have one in a regular object.
6209 This is to satisfy cases like ".quad .foo". Calls to functions
6210 in dynamic objects are handled elsewhere. */
6211 if (fh->elf.root.type == bfd_link_hash_undefweak
6212 && fh->was_undefined
6213 && (fdh = defined_func_desc (fh)) != NULL
6214 && get_opd_info (fdh->elf.root.u.def.section) != NULL
6215 && opd_entry_value (fdh->elf.root.u.def.section,
6216 fdh->elf.root.u.def.value,
6217 &fh->elf.root.u.def.section,
6218 &fh->elf.root.u.def.value) != (bfd_vma) -1)
6219 {
6220 fh->elf.root.type = fdh->elf.root.type;
6221 fh->elf.forced_local = 1;
6222 fh->elf.def_regular = fdh->elf.def_regular;
6223 fh->elf.def_dynamic = fdh->elf.def_dynamic;
6224 }
6225
6226 /* If this is a function code symbol, transfer dynamic linking
6227 information to the function descriptor symbol. */
6228 if (!fh->is_func)
6229 return TRUE;
6230
6231 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next)
6232 if (ent->plt.refcount > 0)
6233 break;
6234 if (ent == NULL
6235 || fh->elf.root.root.string[0] != '.'
6236 || fh->elf.root.root.string[1] == '\0')
6237 return TRUE;
6238
6239 /* Find the corresponding function descriptor symbol. Create it
6240 as undefined if necessary. */
6241
6242 fdh = lookup_fdh (fh, htab);
6243 if (fdh == NULL
6244 && !info->executable
6245 && (fh->elf.root.type == bfd_link_hash_undefined
6246 || fh->elf.root.type == bfd_link_hash_undefweak))
6247 {
6248 fdh = make_fdh (info, fh);
6249 if (fdh == NULL)
6250 return FALSE;
6251 }
6252
6253 /* Fake function descriptors are made undefweak. If the function
6254 code symbol is strong undefined, make the fake sym the same.
6255 If the function code symbol is defined, then force the fake
6256 descriptor local; We can't support overriding of symbols in a
6257 shared library on a fake descriptor. */
6258
6259 if (fdh != NULL
6260 && fdh->fake
6261 && fdh->elf.root.type == bfd_link_hash_undefweak)
6262 {
6263 if (fh->elf.root.type == bfd_link_hash_undefined)
6264 {
6265 fdh->elf.root.type = bfd_link_hash_undefined;
6266 bfd_link_add_undef (&htab->elf.root, &fdh->elf.root);
6267 }
6268 else if (fh->elf.root.type == bfd_link_hash_defined
6269 || fh->elf.root.type == bfd_link_hash_defweak)
6270 {
6271 _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE);
6272 }
6273 }
6274
6275 if (fdh != NULL
6276 && !fdh->elf.forced_local
6277 && (!info->executable
6278 || fdh->elf.def_dynamic
6279 || fdh->elf.ref_dynamic
6280 || (fdh->elf.root.type == bfd_link_hash_undefweak
6281 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT)))
6282 {
6283 if (fdh->elf.dynindx == -1)
6284 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf))
6285 return FALSE;
6286 fdh->elf.ref_regular |= fh->elf.ref_regular;
6287 fdh->elf.ref_dynamic |= fh->elf.ref_dynamic;
6288 fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak;
6289 fdh->elf.non_got_ref |= fh->elf.non_got_ref;
6290 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT)
6291 {
6292 move_plt_plist (fh, fdh);
6293 fdh->elf.needs_plt = 1;
6294 }
6295 fdh->is_func_descriptor = 1;
6296 fdh->oh = fh;
6297 fh->oh = fdh;
6298 }
6299
6300 /* Now that the info is on the function descriptor, clear the
6301 function code sym info. Any function code syms for which we
6302 don't have a definition in a regular file, we force local.
6303 This prevents a shared library from exporting syms that have
6304 been imported from another library. Function code syms that
6305 are really in the library we must leave global to prevent the
6306 linker dragging in a definition from a static library. */
6307 force_local = (!fh->elf.def_regular
6308 || fdh == NULL
6309 || !fdh->elf.def_regular
6310 || fdh->elf.forced_local);
6311 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6312
6313 return TRUE;
6314 }
6315
6316 /* Called near the start of bfd_elf_size_dynamic_sections. We use
6317 this hook to a) provide some gcc support functions, and b) transfer
6318 dynamic linking information gathered so far on function code symbol
6319 entries, to their corresponding function descriptor symbol entries. */
6320
6321 static bfd_boolean
6322 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED,
6323 struct bfd_link_info *info)
6324 {
6325 struct ppc_link_hash_table *htab;
6326 unsigned int i;
6327 const struct sfpr_def_parms funcs[] =
6328 {
6329 { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail },
6330 { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail },
6331 { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail },
6332 { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail },
6333 { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail },
6334 { "_savefpr_", 14, 31, savefpr, savefpr0_tail },
6335 { "_restfpr_", 14, 29, restfpr, restfpr0_tail },
6336 { "_restfpr_", 30, 31, restfpr, restfpr0_tail },
6337 { "._savef", 14, 31, savefpr, savefpr1_tail },
6338 { "._restf", 14, 31, restfpr, restfpr1_tail },
6339 { "_savevr_", 20, 31, savevr, savevr_tail },
6340 { "_restvr_", 20, 31, restvr, restvr_tail }
6341 };
6342
6343 htab = ppc_hash_table (info);
6344 if (htab == NULL)
6345 return FALSE;
6346
6347 if (htab->sfpr == NULL)
6348 /* We don't have any relocs. */
6349 return TRUE;
6350
6351 /* Provide any missing _save* and _rest* functions. */
6352 htab->sfpr->size = 0;
6353 for (i = 0; i < sizeof (funcs) / sizeof (funcs[0]); i++)
6354 if (!sfpr_define (info, &funcs[i]))
6355 return FALSE;
6356
6357 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info);
6358
6359 if (htab->sfpr->size == 0)
6360 htab->sfpr->flags |= SEC_EXCLUDE;
6361
6362 return TRUE;
6363 }
6364
6365 /* Adjust a symbol defined by a dynamic object and referenced by a
6366 regular object. The current definition is in some section of the
6367 dynamic object, but we're not including those sections. We have to
6368 change the definition to something the rest of the link can
6369 understand. */
6370
6371 static bfd_boolean
6372 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
6373 struct elf_link_hash_entry *h)
6374 {
6375 struct ppc_link_hash_table *htab;
6376 asection *s;
6377
6378 htab = ppc_hash_table (info);
6379 if (htab == NULL)
6380 return FALSE;
6381
6382 /* Deal with function syms. */
6383 if (h->type == STT_FUNC
6384 || h->type == STT_GNU_IFUNC
6385 || h->needs_plt)
6386 {
6387 /* Clear procedure linkage table information for any symbol that
6388 won't need a .plt entry. */
6389 struct plt_entry *ent;
6390 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6391 if (ent->plt.refcount > 0)
6392 break;
6393 if (ent == NULL
6394 || (h->type != STT_GNU_IFUNC
6395 && (SYMBOL_CALLS_LOCAL (info, h)
6396 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6397 && h->root.type == bfd_link_hash_undefweak))))
6398 {
6399 h->plt.plist = NULL;
6400 h->needs_plt = 0;
6401 }
6402 }
6403 else
6404 h->plt.plist = NULL;
6405
6406 /* If this is a weak symbol, and there is a real definition, the
6407 processor independent code will have arranged for us to see the
6408 real definition first, and we can just use the same value. */
6409 if (h->u.weakdef != NULL)
6410 {
6411 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6412 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6413 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6414 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6415 if (ELIMINATE_COPY_RELOCS)
6416 h->non_got_ref = h->u.weakdef->non_got_ref;
6417 return TRUE;
6418 }
6419
6420 /* If we are creating a shared library, we must presume that the
6421 only references to the symbol are via the global offset table.
6422 For such cases we need not do anything here; the relocations will
6423 be handled correctly by relocate_section. */
6424 if (info->shared)
6425 return TRUE;
6426
6427 /* If there are no references to this symbol that do not use the
6428 GOT, we don't need to generate a copy reloc. */
6429 if (!h->non_got_ref)
6430 return TRUE;
6431
6432 /* Don't generate a copy reloc for symbols defined in the executable. */
6433 if (!h->def_dynamic || !h->ref_regular || h->def_regular)
6434 return TRUE;
6435
6436 if (ELIMINATE_COPY_RELOCS)
6437 {
6438 struct ppc_link_hash_entry * eh;
6439 struct elf_dyn_relocs *p;
6440
6441 eh = (struct ppc_link_hash_entry *) h;
6442 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6443 {
6444 s = p->sec->output_section;
6445 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6446 break;
6447 }
6448
6449 /* If we didn't find any dynamic relocs in read-only sections, then
6450 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6451 if (p == NULL)
6452 {
6453 h->non_got_ref = 0;
6454 return TRUE;
6455 }
6456 }
6457
6458 if (h->plt.plist != NULL)
6459 {
6460 /* We should never get here, but unfortunately there are versions
6461 of gcc out there that improperly (for this ABI) put initialized
6462 function pointers, vtable refs and suchlike in read-only
6463 sections. Allow them to proceed, but warn that this might
6464 break at runtime. */
6465 info->callbacks->einfo
6466 (_("copy reloc against `%s' requires lazy plt linking; "
6467 "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"),
6468 h->root.root.string);
6469 }
6470
6471 /* This is a reference to a symbol defined by a dynamic object which
6472 is not a function. */
6473
6474 if (h->size == 0)
6475 {
6476 info->callbacks->einfo (_("dynamic variable `%s' is zero size\n"),
6477 h->root.root.string);
6478 return TRUE;
6479 }
6480
6481 /* We must allocate the symbol in our .dynbss section, which will
6482 become part of the .bss section of the executable. There will be
6483 an entry for this symbol in the .dynsym section. The dynamic
6484 object will contain position independent code, so all references
6485 from the dynamic object to this symbol will go through the global
6486 offset table. The dynamic linker will use the .dynsym entry to
6487 determine the address it must put in the global offset table, so
6488 both the dynamic object and the regular object will refer to the
6489 same memory location for the variable. */
6490
6491 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker
6492 to copy the initial value out of the dynamic object and into the
6493 runtime process image. We need to remember the offset into the
6494 .rela.bss section we are going to use. */
6495 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
6496 {
6497 htab->relbss->size += sizeof (Elf64_External_Rela);
6498 h->needs_copy = 1;
6499 }
6500
6501 s = htab->dynbss;
6502
6503 return _bfd_elf_adjust_dynamic_copy (h, s);
6504 }
6505
6506 /* If given a function descriptor symbol, hide both the function code
6507 sym and the descriptor. */
6508 static void
6509 ppc64_elf_hide_symbol (struct bfd_link_info *info,
6510 struct elf_link_hash_entry *h,
6511 bfd_boolean force_local)
6512 {
6513 struct ppc_link_hash_entry *eh;
6514 _bfd_elf_link_hash_hide_symbol (info, h, force_local);
6515
6516 eh = (struct ppc_link_hash_entry *) h;
6517 if (eh->is_func_descriptor)
6518 {
6519 struct ppc_link_hash_entry *fh = eh->oh;
6520
6521 if (fh == NULL)
6522 {
6523 const char *p, *q;
6524 struct ppc_link_hash_table *htab;
6525 char save;
6526
6527 /* We aren't supposed to use alloca in BFD because on
6528 systems which do not have alloca the version in libiberty
6529 calls xmalloc, which might cause the program to crash
6530 when it runs out of memory. This function doesn't have a
6531 return status, so there's no way to gracefully return an
6532 error. So cheat. We know that string[-1] can be safely
6533 accessed; It's either a string in an ELF string table,
6534 or allocated in an objalloc structure. */
6535
6536 p = eh->elf.root.root.string - 1;
6537 save = *p;
6538 *(char *) p = '.';
6539 htab = ppc_hash_table (info);
6540 if (htab == NULL)
6541 return;
6542
6543 fh = (struct ppc_link_hash_entry *)
6544 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6545 *(char *) p = save;
6546
6547 /* Unfortunately, if it so happens that the string we were
6548 looking for was allocated immediately before this string,
6549 then we overwrote the string terminator. That's the only
6550 reason the lookup should fail. */
6551 if (fh == NULL)
6552 {
6553 q = eh->elf.root.root.string + strlen (eh->elf.root.root.string);
6554 while (q >= eh->elf.root.root.string && *q == *p)
6555 --q, --p;
6556 if (q < eh->elf.root.root.string && *p == '.')
6557 fh = (struct ppc_link_hash_entry *)
6558 elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE);
6559 }
6560 if (fh != NULL)
6561 {
6562 eh->oh = fh;
6563 fh->oh = eh;
6564 }
6565 }
6566 if (fh != NULL)
6567 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local);
6568 }
6569 }
6570
6571 static bfd_boolean
6572 get_sym_h (struct elf_link_hash_entry **hp,
6573 Elf_Internal_Sym **symp,
6574 asection **symsecp,
6575 unsigned char **tls_maskp,
6576 Elf_Internal_Sym **locsymsp,
6577 unsigned long r_symndx,
6578 bfd *ibfd)
6579 {
6580 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
6581
6582 if (r_symndx >= symtab_hdr->sh_info)
6583 {
6584 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
6585 struct elf_link_hash_entry *h;
6586
6587 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6588 h = elf_follow_link (h);
6589
6590 if (hp != NULL)
6591 *hp = h;
6592
6593 if (symp != NULL)
6594 *symp = NULL;
6595
6596 if (symsecp != NULL)
6597 {
6598 asection *symsec = NULL;
6599 if (h->root.type == bfd_link_hash_defined
6600 || h->root.type == bfd_link_hash_defweak)
6601 symsec = h->root.u.def.section;
6602 *symsecp = symsec;
6603 }
6604
6605 if (tls_maskp != NULL)
6606 {
6607 struct ppc_link_hash_entry *eh;
6608
6609 eh = (struct ppc_link_hash_entry *) h;
6610 *tls_maskp = &eh->tls_mask;
6611 }
6612 }
6613 else
6614 {
6615 Elf_Internal_Sym *sym;
6616 Elf_Internal_Sym *locsyms = *locsymsp;
6617
6618 if (locsyms == NULL)
6619 {
6620 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
6621 if (locsyms == NULL)
6622 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
6623 symtab_hdr->sh_info,
6624 0, NULL, NULL, NULL);
6625 if (locsyms == NULL)
6626 return FALSE;
6627 *locsymsp = locsyms;
6628 }
6629 sym = locsyms + r_symndx;
6630
6631 if (hp != NULL)
6632 *hp = NULL;
6633
6634 if (symp != NULL)
6635 *symp = sym;
6636
6637 if (symsecp != NULL)
6638 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
6639
6640 if (tls_maskp != NULL)
6641 {
6642 struct got_entry **lgot_ents;
6643 unsigned char *tls_mask;
6644
6645 tls_mask = NULL;
6646 lgot_ents = elf_local_got_ents (ibfd);
6647 if (lgot_ents != NULL)
6648 {
6649 struct plt_entry **local_plt = (struct plt_entry **)
6650 (lgot_ents + symtab_hdr->sh_info);
6651 unsigned char *lgot_masks = (unsigned char *)
6652 (local_plt + symtab_hdr->sh_info);
6653 tls_mask = &lgot_masks[r_symndx];
6654 }
6655 *tls_maskp = tls_mask;
6656 }
6657 }
6658 return TRUE;
6659 }
6660
6661 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on
6662 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD
6663 type suitable for optimization, and 1 otherwise. */
6664
6665 static int
6666 get_tls_mask (unsigned char **tls_maskp,
6667 unsigned long *toc_symndx,
6668 bfd_vma *toc_addend,
6669 Elf_Internal_Sym **locsymsp,
6670 const Elf_Internal_Rela *rel,
6671 bfd *ibfd)
6672 {
6673 unsigned long r_symndx;
6674 int next_r;
6675 struct elf_link_hash_entry *h;
6676 Elf_Internal_Sym *sym;
6677 asection *sec;
6678 bfd_vma off;
6679
6680 r_symndx = ELF64_R_SYM (rel->r_info);
6681 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6682 return 0;
6683
6684 if ((*tls_maskp != NULL && **tls_maskp != 0)
6685 || sec == NULL
6686 || ppc64_elf_section_data (sec) == NULL
6687 || ppc64_elf_section_data (sec)->sec_type != sec_toc)
6688 return 1;
6689
6690 /* Look inside a TOC section too. */
6691 if (h != NULL)
6692 {
6693 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
6694 off = h->root.u.def.value;
6695 }
6696 else
6697 off = sym->st_value;
6698 off += rel->r_addend;
6699 BFD_ASSERT (off % 8 == 0);
6700 r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8];
6701 next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1];
6702 if (toc_symndx != NULL)
6703 *toc_symndx = r_symndx;
6704 if (toc_addend != NULL)
6705 *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8];
6706 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd))
6707 return 0;
6708 if ((h == NULL || is_static_defined (h))
6709 && (next_r == -1 || next_r == -2))
6710 return 1 - next_r;
6711 return 1;
6712 }
6713
6714 /* Adjust all global syms defined in opd sections. In gcc generated
6715 code for the old ABI, these will already have been done. */
6716
6717 static bfd_boolean
6718 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
6719 {
6720 struct ppc_link_hash_entry *eh;
6721 asection *sym_sec;
6722 struct _opd_sec_data *opd;
6723
6724 if (h->root.type == bfd_link_hash_indirect)
6725 return TRUE;
6726
6727 if (h->root.type != bfd_link_hash_defined
6728 && h->root.type != bfd_link_hash_defweak)
6729 return TRUE;
6730
6731 eh = (struct ppc_link_hash_entry *) h;
6732 if (eh->adjust_done)
6733 return TRUE;
6734
6735 sym_sec = eh->elf.root.u.def.section;
6736 opd = get_opd_info (sym_sec);
6737 if (opd != NULL && opd->adjust != NULL)
6738 {
6739 long adjust = opd->adjust[eh->elf.root.u.def.value / 8];
6740 if (adjust == -1)
6741 {
6742 /* This entry has been deleted. */
6743 asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section;
6744 if (dsec == NULL)
6745 {
6746 for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next)
6747 if (elf_discarded_section (dsec))
6748 {
6749 ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec;
6750 break;
6751 }
6752 }
6753 eh->elf.root.u.def.value = 0;
6754 eh->elf.root.u.def.section = dsec;
6755 }
6756 else
6757 eh->elf.root.u.def.value += adjust;
6758 eh->adjust_done = 1;
6759 }
6760 return TRUE;
6761 }
6762
6763 /* Handles decrementing dynamic reloc counts for the reloc specified by
6764 R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM_SEC
6765 have already been determined. */
6766
6767 static bfd_boolean
6768 dec_dynrel_count (bfd_vma r_info,
6769 asection *sec,
6770 struct bfd_link_info *info,
6771 Elf_Internal_Sym **local_syms,
6772 struct elf_link_hash_entry *h,
6773 asection *sym_sec)
6774 {
6775 enum elf_ppc64_reloc_type r_type;
6776 struct elf_dyn_relocs *p;
6777 struct elf_dyn_relocs **pp;
6778
6779 /* Can this reloc be dynamic? This switch, and later tests here
6780 should be kept in sync with the code in check_relocs. */
6781 r_type = ELF64_R_TYPE (r_info);
6782 switch (r_type)
6783 {
6784 default:
6785 return TRUE;
6786
6787 case R_PPC64_TPREL16:
6788 case R_PPC64_TPREL16_LO:
6789 case R_PPC64_TPREL16_HI:
6790 case R_PPC64_TPREL16_HA:
6791 case R_PPC64_TPREL16_DS:
6792 case R_PPC64_TPREL16_LO_DS:
6793 case R_PPC64_TPREL16_HIGHER:
6794 case R_PPC64_TPREL16_HIGHERA:
6795 case R_PPC64_TPREL16_HIGHEST:
6796 case R_PPC64_TPREL16_HIGHESTA:
6797 if (!info->shared)
6798 return TRUE;
6799
6800 case R_PPC64_TPREL64:
6801 case R_PPC64_DTPMOD64:
6802 case R_PPC64_DTPREL64:
6803 case R_PPC64_ADDR64:
6804 case R_PPC64_REL30:
6805 case R_PPC64_REL32:
6806 case R_PPC64_REL64:
6807 case R_PPC64_ADDR14:
6808 case R_PPC64_ADDR14_BRNTAKEN:
6809 case R_PPC64_ADDR14_BRTAKEN:
6810 case R_PPC64_ADDR16:
6811 case R_PPC64_ADDR16_DS:
6812 case R_PPC64_ADDR16_HA:
6813 case R_PPC64_ADDR16_HI:
6814 case R_PPC64_ADDR16_HIGHER:
6815 case R_PPC64_ADDR16_HIGHERA:
6816 case R_PPC64_ADDR16_HIGHEST:
6817 case R_PPC64_ADDR16_HIGHESTA:
6818 case R_PPC64_ADDR16_LO:
6819 case R_PPC64_ADDR16_LO_DS:
6820 case R_PPC64_ADDR24:
6821 case R_PPC64_ADDR32:
6822 case R_PPC64_UADDR16:
6823 case R_PPC64_UADDR32:
6824 case R_PPC64_UADDR64:
6825 case R_PPC64_TOC:
6826 break;
6827 }
6828
6829 if (local_syms != NULL)
6830 {
6831 unsigned long r_symndx;
6832 Elf_Internal_Sym *sym;
6833 bfd *ibfd = sec->owner;
6834
6835 r_symndx = ELF64_R_SYM (r_info);
6836 if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd))
6837 return FALSE;
6838 }
6839
6840 if ((info->shared
6841 && (must_be_dyn_reloc (info, r_type)
6842 || (h != NULL
6843 && (!info->symbolic
6844 || h->root.type == bfd_link_hash_defweak
6845 || !h->def_regular))))
6846 || (ELIMINATE_COPY_RELOCS
6847 && !info->shared
6848 && h != NULL
6849 && (h->root.type == bfd_link_hash_defweak
6850 || !h->def_regular)))
6851 ;
6852 else
6853 return TRUE;
6854
6855 if (h != NULL)
6856 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
6857 else
6858 {
6859 if (sym_sec != NULL)
6860 {
6861 void *vpp = &elf_section_data (sym_sec)->local_dynrel;
6862 pp = (struct elf_dyn_relocs **) vpp;
6863 }
6864 else
6865 {
6866 void *vpp = &elf_section_data (sec)->local_dynrel;
6867 pp = (struct elf_dyn_relocs **) vpp;
6868 }
6869
6870 /* elf_gc_sweep may have already removed all dyn relocs associated
6871 with local syms for a given section. Don't report a dynreloc
6872 miscount. */
6873 if (*pp == NULL)
6874 return TRUE;
6875 }
6876
6877 while ((p = *pp) != NULL)
6878 {
6879 if (p->sec == sec)
6880 {
6881 if (!must_be_dyn_reloc (info, r_type))
6882 p->pc_count -= 1;
6883 p->count -= 1;
6884 if (p->count == 0)
6885 *pp = p->next;
6886 return TRUE;
6887 }
6888 pp = &p->next;
6889 }
6890
6891 info->callbacks->einfo (_("dynreloc miscount for %B, section %A\n"),
6892 sec->owner, sec);
6893 bfd_set_error (bfd_error_bad_value);
6894 return FALSE;
6895 }
6896
6897 /* Remove unused Official Procedure Descriptor entries. Currently we
6898 only remove those associated with functions in discarded link-once
6899 sections, or weakly defined functions that have been overridden. It
6900 would be possible to remove many more entries for statically linked
6901 applications. */
6902
6903 bfd_boolean
6904 ppc64_elf_edit_opd (struct bfd_link_info *info, bfd_boolean non_overlapping)
6905 {
6906 bfd *ibfd;
6907 bfd_boolean some_edited = FALSE;
6908 asection *need_pad = NULL;
6909
6910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6911 {
6912 asection *sec;
6913 Elf_Internal_Rela *relstart, *rel, *relend;
6914 Elf_Internal_Shdr *symtab_hdr;
6915 Elf_Internal_Sym *local_syms;
6916 bfd_vma offset;
6917 struct _opd_sec_data *opd;
6918 bfd_boolean need_edit, add_aux_fields;
6919 bfd_size_type cnt_16b = 0;
6920
6921 if (!is_ppc64_elf (ibfd))
6922 continue;
6923
6924 sec = bfd_get_section_by_name (ibfd, ".opd");
6925 if (sec == NULL || sec->size == 0)
6926 continue;
6927
6928 if (sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS)
6929 continue;
6930
6931 if (sec->output_section == bfd_abs_section_ptr)
6932 continue;
6933
6934 /* Look through the section relocs. */
6935 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
6936 continue;
6937
6938 local_syms = NULL;
6939 symtab_hdr = &elf_symtab_hdr (ibfd);
6940
6941 /* Read the relocations. */
6942 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
6943 info->keep_memory);
6944 if (relstart == NULL)
6945 return FALSE;
6946
6947 /* First run through the relocs to check they are sane, and to
6948 determine whether we need to edit this opd section. */
6949 need_edit = FALSE;
6950 need_pad = sec;
6951 offset = 0;
6952 relend = relstart + sec->reloc_count;
6953 for (rel = relstart; rel < relend; )
6954 {
6955 enum elf_ppc64_reloc_type r_type;
6956 unsigned long r_symndx;
6957 asection *sym_sec;
6958 struct elf_link_hash_entry *h;
6959 Elf_Internal_Sym *sym;
6960
6961 /* .opd contains a regular array of 16 or 24 byte entries. We're
6962 only interested in the reloc pointing to a function entry
6963 point. */
6964 if (rel->r_offset != offset
6965 || rel + 1 >= relend
6966 || (rel + 1)->r_offset != offset + 8)
6967 {
6968 /* If someone messes with .opd alignment then after a
6969 "ld -r" we might have padding in the middle of .opd.
6970 Also, there's nothing to prevent someone putting
6971 something silly in .opd with the assembler. No .opd
6972 optimization for them! */
6973 broken_opd:
6974 (*_bfd_error_handler)
6975 (_("%B: .opd is not a regular array of opd entries"), ibfd);
6976 need_edit = FALSE;
6977 break;
6978 }
6979
6980 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64
6981 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC)
6982 {
6983 (*_bfd_error_handler)
6984 (_("%B: unexpected reloc type %u in .opd section"),
6985 ibfd, r_type);
6986 need_edit = FALSE;
6987 break;
6988 }
6989
6990 r_symndx = ELF64_R_SYM (rel->r_info);
6991 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
6992 r_symndx, ibfd))
6993 goto error_ret;
6994
6995 if (sym_sec == NULL || sym_sec->owner == NULL)
6996 {
6997 const char *sym_name;
6998 if (h != NULL)
6999 sym_name = h->root.root.string;
7000 else
7001 sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym,
7002 sym_sec);
7003
7004 (*_bfd_error_handler)
7005 (_("%B: undefined sym `%s' in .opd section"),
7006 ibfd, sym_name);
7007 need_edit = FALSE;
7008 break;
7009 }
7010
7011 /* opd entries are always for functions defined in the
7012 current input bfd. If the symbol isn't defined in the
7013 input bfd, then we won't be using the function in this
7014 bfd; It must be defined in a linkonce section in another
7015 bfd, or is weak. It's also possible that we are
7016 discarding the function due to a linker script /DISCARD/,
7017 which we test for via the output_section. */
7018 if (sym_sec->owner != ibfd
7019 || sym_sec->output_section == bfd_abs_section_ptr)
7020 need_edit = TRUE;
7021
7022 rel += 2;
7023 if (rel == relend
7024 || (rel + 1 == relend && rel->r_offset == offset + 16))
7025 {
7026 if (sec->size == offset + 24)
7027 {
7028 need_pad = NULL;
7029 break;
7030 }
7031 if (rel == relend && sec->size == offset + 16)
7032 {
7033 cnt_16b++;
7034 break;
7035 }
7036 goto broken_opd;
7037 }
7038
7039 if (rel->r_offset == offset + 24)
7040 offset += 24;
7041 else if (rel->r_offset != offset + 16)
7042 goto broken_opd;
7043 else if (rel + 1 < relend
7044 && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64
7045 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC)
7046 {
7047 offset += 16;
7048 cnt_16b++;
7049 }
7050 else if (rel + 2 < relend
7051 && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_ADDR64
7052 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)
7053 {
7054 offset += 24;
7055 rel += 1;
7056 }
7057 else
7058 goto broken_opd;
7059 }
7060
7061 add_aux_fields = non_overlapping && cnt_16b > 0;
7062
7063 if (need_edit || add_aux_fields)
7064 {
7065 Elf_Internal_Rela *write_rel;
7066 Elf_Internal_Shdr *rel_hdr;
7067 bfd_byte *rptr, *wptr;
7068 bfd_byte *new_contents;
7069 bfd_boolean skip;
7070 long opd_ent_size;
7071 bfd_size_type amt;
7072
7073 new_contents = NULL;
7074 amt = sec->size * sizeof (long) / 8;
7075 opd = &ppc64_elf_section_data (sec)->u.opd;
7076 opd->adjust = bfd_zalloc (sec->owner, amt);
7077 if (opd->adjust == NULL)
7078 return FALSE;
7079 ppc64_elf_section_data (sec)->sec_type = sec_opd;
7080
7081 /* This seems a waste of time as input .opd sections are all
7082 zeros as generated by gcc, but I suppose there's no reason
7083 this will always be so. We might start putting something in
7084 the third word of .opd entries. */
7085 if ((sec->flags & SEC_IN_MEMORY) == 0)
7086 {
7087 bfd_byte *loc;
7088 if (!bfd_malloc_and_get_section (ibfd, sec, &loc))
7089 {
7090 if (loc != NULL)
7091 free (loc);
7092 error_ret:
7093 if (local_syms != NULL
7094 && symtab_hdr->contents != (unsigned char *) local_syms)
7095 free (local_syms);
7096 if (elf_section_data (sec)->relocs != relstart)
7097 free (relstart);
7098 return FALSE;
7099 }
7100 sec->contents = loc;
7101 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7102 }
7103
7104 elf_section_data (sec)->relocs = relstart;
7105
7106 new_contents = sec->contents;
7107 if (add_aux_fields)
7108 {
7109 new_contents = bfd_malloc (sec->size + cnt_16b * 8);
7110 if (new_contents == NULL)
7111 return FALSE;
7112 need_pad = FALSE;
7113 }
7114 wptr = new_contents;
7115 rptr = sec->contents;
7116
7117 write_rel = relstart;
7118 skip = FALSE;
7119 offset = 0;
7120 opd_ent_size = 0;
7121 for (rel = relstart; rel < relend; rel++)
7122 {
7123 unsigned long r_symndx;
7124 asection *sym_sec;
7125 struct elf_link_hash_entry *h;
7126 Elf_Internal_Sym *sym;
7127
7128 r_symndx = ELF64_R_SYM (rel->r_info);
7129 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
7130 r_symndx, ibfd))
7131 goto error_ret;
7132
7133 if (rel->r_offset == offset)
7134 {
7135 struct ppc_link_hash_entry *fdh = NULL;
7136
7137 /* See if the .opd entry is full 24 byte or
7138 16 byte (with fd_aux entry overlapped with next
7139 fd_func). */
7140 opd_ent_size = 24;
7141 if ((rel + 2 == relend && sec->size == offset + 16)
7142 || (rel + 3 < relend
7143 && rel[2].r_offset == offset + 16
7144 && rel[3].r_offset == offset + 24
7145 && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_ADDR64
7146 && ELF64_R_TYPE (rel[3].r_info) == R_PPC64_TOC))
7147 opd_ent_size = 16;
7148
7149 if (h != NULL
7150 && h->root.root.string[0] == '.')
7151 {
7152 struct ppc_link_hash_table *htab;
7153
7154 htab = ppc_hash_table (info);
7155 if (htab != NULL)
7156 fdh = lookup_fdh ((struct ppc_link_hash_entry *) h,
7157 htab);
7158 if (fdh != NULL
7159 && fdh->elf.root.type != bfd_link_hash_defined
7160 && fdh->elf.root.type != bfd_link_hash_defweak)
7161 fdh = NULL;
7162 }
7163
7164 skip = (sym_sec->owner != ibfd
7165 || sym_sec->output_section == bfd_abs_section_ptr);
7166 if (skip)
7167 {
7168 if (fdh != NULL && sym_sec->owner == ibfd)
7169 {
7170 /* Arrange for the function descriptor sym
7171 to be dropped. */
7172 fdh->elf.root.u.def.value = 0;
7173 fdh->elf.root.u.def.section = sym_sec;
7174 }
7175 opd->adjust[rel->r_offset / 8] = -1;
7176 }
7177 else
7178 {
7179 /* We'll be keeping this opd entry. */
7180
7181 if (fdh != NULL)
7182 {
7183 /* Redefine the function descriptor symbol to
7184 this location in the opd section. It is
7185 necessary to update the value here rather
7186 than using an array of adjustments as we do
7187 for local symbols, because various places
7188 in the generic ELF code use the value
7189 stored in u.def.value. */
7190 fdh->elf.root.u.def.value = wptr - new_contents;
7191 fdh->adjust_done = 1;
7192 }
7193
7194 /* Local syms are a bit tricky. We could
7195 tweak them as they can be cached, but
7196 we'd need to look through the local syms
7197 for the function descriptor sym which we
7198 don't have at the moment. So keep an
7199 array of adjustments. */
7200 opd->adjust[rel->r_offset / 8]
7201 = (wptr - new_contents) - (rptr - sec->contents);
7202
7203 if (wptr != rptr)
7204 memcpy (wptr, rptr, opd_ent_size);
7205 wptr += opd_ent_size;
7206 if (add_aux_fields && opd_ent_size == 16)
7207 {
7208 memset (wptr, '\0', 8);
7209 wptr += 8;
7210 }
7211 }
7212 rptr += opd_ent_size;
7213 offset += opd_ent_size;
7214 }
7215
7216 if (skip)
7217 {
7218 if (!NO_OPD_RELOCS
7219 && !info->relocatable
7220 && !dec_dynrel_count (rel->r_info, sec, info,
7221 NULL, h, sym_sec))
7222 goto error_ret;
7223 }
7224 else
7225 {
7226 /* We need to adjust any reloc offsets to point to the
7227 new opd entries. While we're at it, we may as well
7228 remove redundant relocs. */
7229 rel->r_offset += opd->adjust[(offset - opd_ent_size) / 8];
7230 if (write_rel != rel)
7231 memcpy (write_rel, rel, sizeof (*rel));
7232 ++write_rel;
7233 }
7234 }
7235
7236 sec->size = wptr - new_contents;
7237 sec->reloc_count = write_rel - relstart;
7238 if (add_aux_fields)
7239 {
7240 free (sec->contents);
7241 sec->contents = new_contents;
7242 }
7243
7244 /* Fudge the header size too, as this is used later in
7245 elf_bfd_final_link if we are emitting relocs. */
7246 rel_hdr = _bfd_elf_single_rel_hdr (sec);
7247 rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize;
7248 some_edited = TRUE;
7249 }
7250 else if (elf_section_data (sec)->relocs != relstart)
7251 free (relstart);
7252
7253 if (local_syms != NULL
7254 && symtab_hdr->contents != (unsigned char *) local_syms)
7255 {
7256 if (!info->keep_memory)
7257 free (local_syms);
7258 else
7259 symtab_hdr->contents = (unsigned char *) local_syms;
7260 }
7261 }
7262
7263 if (some_edited)
7264 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL);
7265
7266 /* If we are doing a final link and the last .opd entry is just 16 byte
7267 long, add a 8 byte padding after it. */
7268 if (need_pad != NULL && !info->relocatable)
7269 {
7270 bfd_byte *p;
7271
7272 if ((need_pad->flags & SEC_IN_MEMORY) == 0)
7273 {
7274 BFD_ASSERT (need_pad->size > 0);
7275
7276 p = bfd_malloc (need_pad->size + 8);
7277 if (p == NULL)
7278 return FALSE;
7279
7280 if (! bfd_get_section_contents (need_pad->owner, need_pad,
7281 p, 0, need_pad->size))
7282 return FALSE;
7283
7284 need_pad->contents = p;
7285 need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
7286 }
7287 else
7288 {
7289 p = bfd_realloc (need_pad->contents, need_pad->size + 8);
7290 if (p == NULL)
7291 return FALSE;
7292
7293 need_pad->contents = p;
7294 }
7295
7296 memset (need_pad->contents + need_pad->size, 0, 8);
7297 need_pad->size += 8;
7298 }
7299
7300 return TRUE;
7301 }
7302
7303 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
7304
7305 asection *
7306 ppc64_elf_tls_setup (struct bfd_link_info *info,
7307 int no_tls_get_addr_opt,
7308 int *no_multi_toc)
7309 {
7310 struct ppc_link_hash_table *htab;
7311
7312 htab = ppc_hash_table (info);
7313 if (htab == NULL)
7314 return NULL;
7315
7316 if (*no_multi_toc)
7317 htab->do_multi_toc = 0;
7318 else if (!htab->do_multi_toc)
7319 *no_multi_toc = 1;
7320
7321 htab->tls_get_addr = ((struct ppc_link_hash_entry *)
7322 elf_link_hash_lookup (&htab->elf, ".__tls_get_addr",
7323 FALSE, FALSE, TRUE));
7324 /* Move dynamic linking info to the function descriptor sym. */
7325 if (htab->tls_get_addr != NULL)
7326 func_desc_adjust (&htab->tls_get_addr->elf, info);
7327 htab->tls_get_addr_fd = ((struct ppc_link_hash_entry *)
7328 elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
7329 FALSE, FALSE, TRUE));
7330 if (!no_tls_get_addr_opt)
7331 {
7332 struct elf_link_hash_entry *opt, *opt_fd, *tga, *tga_fd;
7333
7334 opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt",
7335 FALSE, FALSE, TRUE);
7336 if (opt != NULL)
7337 func_desc_adjust (opt, info);
7338 opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
7339 FALSE, FALSE, TRUE);
7340 if (opt_fd != NULL
7341 && (opt_fd->root.type == bfd_link_hash_defined
7342 || opt_fd->root.type == bfd_link_hash_defweak))
7343 {
7344 /* If glibc supports an optimized __tls_get_addr call stub,
7345 signalled by the presence of __tls_get_addr_opt, and we'll
7346 be calling __tls_get_addr via a plt call stub, then
7347 make __tls_get_addr point to __tls_get_addr_opt. */
7348 tga_fd = &htab->tls_get_addr_fd->elf;
7349 if (htab->elf.dynamic_sections_created
7350 && tga_fd != NULL
7351 && (tga_fd->type == STT_FUNC
7352 || tga_fd->needs_plt)
7353 && !(SYMBOL_CALLS_LOCAL (info, tga_fd)
7354 || (ELF_ST_VISIBILITY (tga_fd->other) != STV_DEFAULT
7355 && tga_fd->root.type == bfd_link_hash_undefweak)))
7356 {
7357 struct plt_entry *ent;
7358
7359 for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next)
7360 if (ent->plt.refcount > 0)
7361 break;
7362 if (ent != NULL)
7363 {
7364 tga_fd->root.type = bfd_link_hash_indirect;
7365 tga_fd->root.u.i.link = &opt_fd->root;
7366 ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd);
7367 if (opt_fd->dynindx != -1)
7368 {
7369 /* Use __tls_get_addr_opt in dynamic relocations. */
7370 opt_fd->dynindx = -1;
7371 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
7372 opt_fd->dynstr_index);
7373 if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd))
7374 return NULL;
7375 }
7376 htab->tls_get_addr_fd = (struct ppc_link_hash_entry *) opt_fd;
7377 tga = &htab->tls_get_addr->elf;
7378 if (opt != NULL && tga != NULL)
7379 {
7380 tga->root.type = bfd_link_hash_indirect;
7381 tga->root.u.i.link = &opt->root;
7382 ppc64_elf_copy_indirect_symbol (info, opt, tga);
7383 _bfd_elf_link_hash_hide_symbol (info, opt,
7384 tga->forced_local);
7385 htab->tls_get_addr = (struct ppc_link_hash_entry *) opt;
7386 }
7387 htab->tls_get_addr_fd->oh = htab->tls_get_addr;
7388 htab->tls_get_addr_fd->is_func_descriptor = 1;
7389 if (htab->tls_get_addr != NULL)
7390 {
7391 htab->tls_get_addr->oh = htab->tls_get_addr_fd;
7392 htab->tls_get_addr->is_func = 1;
7393 }
7394 }
7395 }
7396 }
7397 else
7398 no_tls_get_addr_opt = TRUE;
7399 }
7400 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
7401 return _bfd_elf_tls_setup (info->output_bfd, info);
7402 }
7403
7404 /* Return TRUE iff REL is a branch reloc with a global symbol matching
7405 HASH1 or HASH2. */
7406
7407 static bfd_boolean
7408 branch_reloc_hash_match (const bfd *ibfd,
7409 const Elf_Internal_Rela *rel,
7410 const struct ppc_link_hash_entry *hash1,
7411 const struct ppc_link_hash_entry *hash2)
7412 {
7413 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
7414 enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info);
7415 unsigned int r_symndx = ELF64_R_SYM (rel->r_info);
7416
7417 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
7418 {
7419 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
7420 struct elf_link_hash_entry *h;
7421
7422 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7423 h = elf_follow_link (h);
7424 if (h == &hash1->elf || h == &hash2->elf)
7425 return TRUE;
7426 }
7427 return FALSE;
7428 }
7429
7430 /* Run through all the TLS relocs looking for optimization
7431 opportunities. The linker has been hacked (see ppc64elf.em) to do
7432 a preliminary section layout so that we know the TLS segment
7433 offsets. We can't optimize earlier because some optimizations need
7434 to know the tp offset, and we need to optimize before allocating
7435 dynamic relocations. */
7436
7437 bfd_boolean
7438 ppc64_elf_tls_optimize (struct bfd_link_info *info)
7439 {
7440 bfd *ibfd;
7441 asection *sec;
7442 struct ppc_link_hash_table *htab;
7443 unsigned char *toc_ref;
7444 int pass;
7445
7446 if (info->relocatable || !info->executable)
7447 return TRUE;
7448
7449 htab = ppc_hash_table (info);
7450 if (htab == NULL)
7451 return FALSE;
7452
7453 /* Make two passes over the relocs. On the first pass, mark toc
7454 entries involved with tls relocs, and check that tls relocs
7455 involved in setting up a tls_get_addr call are indeed followed by
7456 such a call. If they are not, we can't do any tls optimization.
7457 On the second pass twiddle tls_mask flags to notify
7458 relocate_section that optimization can be done, and adjust got
7459 and plt refcounts. */
7460 toc_ref = NULL;
7461 for (pass = 0; pass < 2; ++pass)
7462 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7463 {
7464 Elf_Internal_Sym *locsyms = NULL;
7465 asection *toc = bfd_get_section_by_name (ibfd, ".toc");
7466
7467 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7468 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
7469 {
7470 Elf_Internal_Rela *relstart, *rel, *relend;
7471 bfd_boolean found_tls_get_addr_arg = 0;
7472
7473 /* Read the relocations. */
7474 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
7475 info->keep_memory);
7476 if (relstart == NULL)
7477 return FALSE;
7478
7479 relend = relstart + sec->reloc_count;
7480 for (rel = relstart; rel < relend; rel++)
7481 {
7482 enum elf_ppc64_reloc_type r_type;
7483 unsigned long r_symndx;
7484 struct elf_link_hash_entry *h;
7485 Elf_Internal_Sym *sym;
7486 asection *sym_sec;
7487 unsigned char *tls_mask;
7488 unsigned char tls_set, tls_clear, tls_type = 0;
7489 bfd_vma value;
7490 bfd_boolean ok_tprel, is_local;
7491 long toc_ref_index = 0;
7492 int expecting_tls_get_addr = 0;
7493 bfd_boolean ret = FALSE;
7494
7495 r_symndx = ELF64_R_SYM (rel->r_info);
7496 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms,
7497 r_symndx, ibfd))
7498 {
7499 err_free_rel:
7500 if (elf_section_data (sec)->relocs != relstart)
7501 free (relstart);
7502 if (toc_ref != NULL)
7503 free (toc_ref);
7504 if (locsyms != NULL
7505 && (elf_symtab_hdr (ibfd).contents
7506 != (unsigned char *) locsyms))
7507 free (locsyms);
7508 return ret;
7509 }
7510
7511 if (h != NULL)
7512 {
7513 if (h->root.type == bfd_link_hash_defined
7514 || h->root.type == bfd_link_hash_defweak)
7515 value = h->root.u.def.value;
7516 else if (h->root.type == bfd_link_hash_undefweak)
7517 value = 0;
7518 else
7519 {
7520 found_tls_get_addr_arg = 0;
7521 continue;
7522 }
7523 }
7524 else
7525 /* Symbols referenced by TLS relocs must be of type
7526 STT_TLS. So no need for .opd local sym adjust. */
7527 value = sym->st_value;
7528
7529 ok_tprel = FALSE;
7530 is_local = FALSE;
7531 if (h == NULL
7532 || !h->def_dynamic)
7533 {
7534 is_local = TRUE;
7535 if (h != NULL
7536 && h->root.type == bfd_link_hash_undefweak)
7537 ok_tprel = TRUE;
7538 else
7539 {
7540 value += sym_sec->output_offset;
7541 value += sym_sec->output_section->vma;
7542 value -= htab->elf.tls_sec->vma;
7543 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31)
7544 < (bfd_vma) 1 << 32);
7545 }
7546 }
7547
7548 r_type = ELF64_R_TYPE (rel->r_info);
7549 /* If this section has old-style __tls_get_addr calls
7550 without marker relocs, then check that each
7551 __tls_get_addr call reloc is preceded by a reloc
7552 that conceivably belongs to the __tls_get_addr arg
7553 setup insn. If we don't find matching arg setup
7554 relocs, don't do any tls optimization. */
7555 if (pass == 0
7556 && sec->has_tls_get_addr_call
7557 && h != NULL
7558 && (h == &htab->tls_get_addr->elf
7559 || h == &htab->tls_get_addr_fd->elf)
7560 && !found_tls_get_addr_arg
7561 && is_branch_reloc (r_type))
7562 {
7563 info->callbacks->minfo (_("%H __tls_get_addr lost arg, "
7564 "TLS optimization disabled\n"),
7565 ibfd, sec, rel->r_offset);
7566 ret = TRUE;
7567 goto err_free_rel;
7568 }
7569
7570 found_tls_get_addr_arg = 0;
7571 switch (r_type)
7572 {
7573 case R_PPC64_GOT_TLSLD16:
7574 case R_PPC64_GOT_TLSLD16_LO:
7575 expecting_tls_get_addr = 1;
7576 found_tls_get_addr_arg = 1;
7577 /* Fall thru */
7578
7579 case R_PPC64_GOT_TLSLD16_HI:
7580 case R_PPC64_GOT_TLSLD16_HA:
7581 /* These relocs should never be against a symbol
7582 defined in a shared lib. Leave them alone if
7583 that turns out to be the case. */
7584 if (!is_local)
7585 continue;
7586
7587 /* LD -> LE */
7588 tls_set = 0;
7589 tls_clear = TLS_LD;
7590 tls_type = TLS_TLS | TLS_LD;
7591 break;
7592
7593 case R_PPC64_GOT_TLSGD16:
7594 case R_PPC64_GOT_TLSGD16_LO:
7595 expecting_tls_get_addr = 1;
7596 found_tls_get_addr_arg = 1;
7597 /* Fall thru */
7598
7599 case R_PPC64_GOT_TLSGD16_HI:
7600 case R_PPC64_GOT_TLSGD16_HA:
7601 if (ok_tprel)
7602 /* GD -> LE */
7603 tls_set = 0;
7604 else
7605 /* GD -> IE */
7606 tls_set = TLS_TLS | TLS_TPRELGD;
7607 tls_clear = TLS_GD;
7608 tls_type = TLS_TLS | TLS_GD;
7609 break;
7610
7611 case R_PPC64_GOT_TPREL16_DS:
7612 case R_PPC64_GOT_TPREL16_LO_DS:
7613 case R_PPC64_GOT_TPREL16_HI:
7614 case R_PPC64_GOT_TPREL16_HA:
7615 if (ok_tprel)
7616 {
7617 /* IE -> LE */
7618 tls_set = 0;
7619 tls_clear = TLS_TPREL;
7620 tls_type = TLS_TLS | TLS_TPREL;
7621 break;
7622 }
7623 continue;
7624
7625 case R_PPC64_TLSGD:
7626 case R_PPC64_TLSLD:
7627 found_tls_get_addr_arg = 1;
7628 /* Fall thru */
7629
7630 case R_PPC64_TLS:
7631 case R_PPC64_TOC16:
7632 case R_PPC64_TOC16_LO:
7633 if (sym_sec == NULL || sym_sec != toc)
7634 continue;
7635
7636 /* Mark this toc entry as referenced by a TLS
7637 code sequence. We can do that now in the
7638 case of R_PPC64_TLS, and after checking for
7639 tls_get_addr for the TOC16 relocs. */
7640 if (toc_ref == NULL)
7641 toc_ref = bfd_zmalloc (toc->output_section->rawsize / 8);
7642 if (toc_ref == NULL)
7643 goto err_free_rel;
7644
7645 if (h != NULL)
7646 value = h->root.u.def.value;
7647 else
7648 value = sym->st_value;
7649 value += rel->r_addend;
7650 BFD_ASSERT (value < toc->size && value % 8 == 0);
7651 toc_ref_index = (value + toc->output_offset) / 8;
7652 if (r_type == R_PPC64_TLS
7653 || r_type == R_PPC64_TLSGD
7654 || r_type == R_PPC64_TLSLD)
7655 {
7656 toc_ref[toc_ref_index] = 1;
7657 continue;
7658 }
7659
7660 if (pass != 0 && toc_ref[toc_ref_index] == 0)
7661 continue;
7662
7663 tls_set = 0;
7664 tls_clear = 0;
7665 expecting_tls_get_addr = 2;
7666 break;
7667
7668 case R_PPC64_TPREL64:
7669 if (pass == 0
7670 || sec != toc
7671 || toc_ref == NULL
7672 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7673 continue;
7674 if (ok_tprel)
7675 {
7676 /* IE -> LE */
7677 tls_set = TLS_EXPLICIT;
7678 tls_clear = TLS_TPREL;
7679 break;
7680 }
7681 continue;
7682
7683 case R_PPC64_DTPMOD64:
7684 if (pass == 0
7685 || sec != toc
7686 || toc_ref == NULL
7687 || !toc_ref[(rel->r_offset + toc->output_offset) / 8])
7688 continue;
7689 if (rel + 1 < relend
7690 && (rel[1].r_info
7691 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64))
7692 && rel[1].r_offset == rel->r_offset + 8)
7693 {
7694 if (ok_tprel)
7695 /* GD -> LE */
7696 tls_set = TLS_EXPLICIT | TLS_GD;
7697 else
7698 /* GD -> IE */
7699 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD;
7700 tls_clear = TLS_GD;
7701 }
7702 else
7703 {
7704 if (!is_local)
7705 continue;
7706
7707 /* LD -> LE */
7708 tls_set = TLS_EXPLICIT;
7709 tls_clear = TLS_LD;
7710 }
7711 break;
7712
7713 default:
7714 continue;
7715 }
7716
7717 if (pass == 0)
7718 {
7719 if (!expecting_tls_get_addr
7720 || !sec->has_tls_get_addr_call)
7721 continue;
7722
7723 if (rel + 1 < relend
7724 && branch_reloc_hash_match (ibfd, rel + 1,
7725 htab->tls_get_addr,
7726 htab->tls_get_addr_fd))
7727 {
7728 if (expecting_tls_get_addr == 2)
7729 {
7730 /* Check for toc tls entries. */
7731 unsigned char *toc_tls;
7732 int retval;
7733
7734 retval = get_tls_mask (&toc_tls, NULL, NULL,
7735 &locsyms,
7736 rel, ibfd);
7737 if (retval == 0)
7738 goto err_free_rel;
7739 if (toc_tls != NULL)
7740 {
7741 if ((*toc_tls & (TLS_GD | TLS_LD)) != 0)
7742 found_tls_get_addr_arg = 1;
7743 if (retval > 1)
7744 toc_ref[toc_ref_index] = 1;
7745 }
7746 }
7747 continue;
7748 }
7749
7750 if (expecting_tls_get_addr != 1)
7751 continue;
7752
7753 /* Uh oh, we didn't find the expected call. We
7754 could just mark this symbol to exclude it
7755 from tls optimization but it's safer to skip
7756 the entire optimization. */
7757 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
7758 "TLS optimization disabled\n"),
7759 ibfd, sec, rel->r_offset);
7760 ret = TRUE;
7761 goto err_free_rel;
7762 }
7763
7764 if (expecting_tls_get_addr && htab->tls_get_addr != NULL)
7765 {
7766 struct plt_entry *ent;
7767 for (ent = htab->tls_get_addr->elf.plt.plist;
7768 ent != NULL;
7769 ent = ent->next)
7770 if (ent->addend == 0)
7771 {
7772 if (ent->plt.refcount > 0)
7773 {
7774 ent->plt.refcount -= 1;
7775 expecting_tls_get_addr = 0;
7776 }
7777 break;
7778 }
7779 }
7780
7781 if (expecting_tls_get_addr && htab->tls_get_addr_fd != NULL)
7782 {
7783 struct plt_entry *ent;
7784 for (ent = htab->tls_get_addr_fd->elf.plt.plist;
7785 ent != NULL;
7786 ent = ent->next)
7787 if (ent->addend == 0)
7788 {
7789 if (ent->plt.refcount > 0)
7790 ent->plt.refcount -= 1;
7791 break;
7792 }
7793 }
7794
7795 if (tls_clear == 0)
7796 continue;
7797
7798 if ((tls_set & TLS_EXPLICIT) == 0)
7799 {
7800 struct got_entry *ent;
7801
7802 /* Adjust got entry for this reloc. */
7803 if (h != NULL)
7804 ent = h->got.glist;
7805 else
7806 ent = elf_local_got_ents (ibfd)[r_symndx];
7807
7808 for (; ent != NULL; ent = ent->next)
7809 if (ent->addend == rel->r_addend
7810 && ent->owner == ibfd
7811 && ent->tls_type == tls_type)
7812 break;
7813 if (ent == NULL)
7814 abort ();
7815
7816 if (tls_set == 0)
7817 {
7818 /* We managed to get rid of a got entry. */
7819 if (ent->got.refcount > 0)
7820 ent->got.refcount -= 1;
7821 }
7822 }
7823 else
7824 {
7825 /* If we got rid of a DTPMOD/DTPREL reloc pair then
7826 we'll lose one or two dyn relocs. */
7827 if (!dec_dynrel_count (rel->r_info, sec, info,
7828 NULL, h, sym_sec))
7829 return FALSE;
7830
7831 if (tls_set == (TLS_EXPLICIT | TLS_GD))
7832 {
7833 if (!dec_dynrel_count ((rel + 1)->r_info, sec, info,
7834 NULL, h, sym_sec))
7835 return FALSE;
7836 }
7837 }
7838
7839 *tls_mask |= tls_set;
7840 *tls_mask &= ~tls_clear;
7841 }
7842
7843 if (elf_section_data (sec)->relocs != relstart)
7844 free (relstart);
7845 }
7846
7847 if (locsyms != NULL
7848 && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms))
7849 {
7850 if (!info->keep_memory)
7851 free (locsyms);
7852 else
7853 elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms;
7854 }
7855 }
7856
7857 if (toc_ref != NULL)
7858 free (toc_ref);
7859 return TRUE;
7860 }
7861
7862 /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust
7863 the values of any global symbols in a toc section that has been
7864 edited. Globals in toc sections should be a rarity, so this function
7865 sets a flag if any are found in toc sections other than the one just
7866 edited, so that futher hash table traversals can be avoided. */
7867
7868 struct adjust_toc_info
7869 {
7870 asection *toc;
7871 unsigned long *skip;
7872 bfd_boolean global_toc_syms;
7873 };
7874
7875 enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 };
7876
7877 static bfd_boolean
7878 adjust_toc_syms (struct elf_link_hash_entry *h, void *inf)
7879 {
7880 struct ppc_link_hash_entry *eh;
7881 struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf;
7882 unsigned long i;
7883
7884 if (h->root.type == bfd_link_hash_indirect)
7885 return TRUE;
7886
7887 if (h->root.type != bfd_link_hash_defined
7888 && h->root.type != bfd_link_hash_defweak)
7889 return TRUE;
7890
7891 eh = (struct ppc_link_hash_entry *) h;
7892 if (eh->adjust_done)
7893 return TRUE;
7894
7895 if (eh->elf.root.u.def.section == toc_inf->toc)
7896 {
7897 if (eh->elf.root.u.def.value > toc_inf->toc->rawsize)
7898 i = toc_inf->toc->rawsize >> 3;
7899 else
7900 i = eh->elf.root.u.def.value >> 3;
7901
7902 if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0)
7903 {
7904 (*_bfd_error_handler)
7905 (_("%s defined on removed toc entry"), eh->elf.root.root.string);
7906 do
7907 ++i;
7908 while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0);
7909 eh->elf.root.u.def.value = (bfd_vma) i << 3;
7910 }
7911
7912 eh->elf.root.u.def.value -= toc_inf->skip[i];
7913 eh->adjust_done = 1;
7914 }
7915 else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0)
7916 toc_inf->global_toc_syms = TRUE;
7917
7918 return TRUE;
7919 }
7920
7921 /* Examine all relocs referencing .toc sections in order to remove
7922 unused .toc entries. */
7923
7924 bfd_boolean
7925 ppc64_elf_edit_toc (struct bfd_link_info *info)
7926 {
7927 bfd *ibfd;
7928 struct adjust_toc_info toc_inf;
7929 struct ppc_link_hash_table *htab = ppc_hash_table (info);
7930
7931 htab->do_toc_opt = 1;
7932 toc_inf.global_toc_syms = TRUE;
7933 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
7934 {
7935 asection *toc, *sec;
7936 Elf_Internal_Shdr *symtab_hdr;
7937 Elf_Internal_Sym *local_syms;
7938 Elf_Internal_Rela *relstart, *rel, *toc_relocs;
7939 unsigned long *skip, *drop;
7940 unsigned char *used;
7941 unsigned char *keep, last, some_unused;
7942
7943 if (!is_ppc64_elf (ibfd))
7944 continue;
7945
7946 toc = bfd_get_section_by_name (ibfd, ".toc");
7947 if (toc == NULL
7948 || toc->size == 0
7949 || toc->sec_info_type == ELF_INFO_TYPE_JUST_SYMS
7950 || elf_discarded_section (toc))
7951 continue;
7952
7953 toc_relocs = NULL;
7954 local_syms = NULL;
7955 symtab_hdr = &elf_symtab_hdr (ibfd);
7956
7957 /* Look at sections dropped from the final link. */
7958 skip = NULL;
7959 relstart = NULL;
7960 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7961 {
7962 if (sec->reloc_count == 0
7963 || !elf_discarded_section (sec)
7964 || get_opd_info (sec)
7965 || (sec->flags & SEC_ALLOC) == 0
7966 || (sec->flags & SEC_DEBUGGING) != 0)
7967 continue;
7968
7969 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE);
7970 if (relstart == NULL)
7971 goto error_ret;
7972
7973 /* Run through the relocs to see which toc entries might be
7974 unused. */
7975 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
7976 {
7977 enum elf_ppc64_reloc_type r_type;
7978 unsigned long r_symndx;
7979 asection *sym_sec;
7980 struct elf_link_hash_entry *h;
7981 Elf_Internal_Sym *sym;
7982 bfd_vma val;
7983
7984 r_type = ELF64_R_TYPE (rel->r_info);
7985 switch (r_type)
7986 {
7987 default:
7988 continue;
7989
7990 case R_PPC64_TOC16:
7991 case R_PPC64_TOC16_LO:
7992 case R_PPC64_TOC16_HI:
7993 case R_PPC64_TOC16_HA:
7994 case R_PPC64_TOC16_DS:
7995 case R_PPC64_TOC16_LO_DS:
7996 break;
7997 }
7998
7999 r_symndx = ELF64_R_SYM (rel->r_info);
8000 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8001 r_symndx, ibfd))
8002 goto error_ret;
8003
8004 if (sym_sec != toc)
8005 continue;
8006
8007 if (h != NULL)
8008 val = h->root.u.def.value;
8009 else
8010 val = sym->st_value;
8011 val += rel->r_addend;
8012
8013 if (val >= toc->size)
8014 continue;
8015
8016 /* Anything in the toc ought to be aligned to 8 bytes.
8017 If not, don't mark as unused. */
8018 if (val & 7)
8019 continue;
8020
8021 if (skip == NULL)
8022 {
8023 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8024 if (skip == NULL)
8025 goto error_ret;
8026 }
8027
8028 skip[val >> 3] = ref_from_discarded;
8029 }
8030
8031 if (elf_section_data (sec)->relocs != relstart)
8032 free (relstart);
8033 }
8034
8035 /* For largetoc loads of address constants, we can convert
8036 . addis rx,2,addr@got@ha
8037 . ld ry,addr@got@l(rx)
8038 to
8039 . addis rx,2,addr@toc@ha
8040 . addi ry,rx,addr@toc@l
8041 when addr is within 2G of the toc pointer. This then means
8042 that the word storing "addr" in the toc is no longer needed. */
8043
8044 if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc
8045 && toc->output_section->rawsize < (bfd_vma) 1 << 31
8046 && toc->reloc_count != 0)
8047 {
8048 /* Read toc relocs. */
8049 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8050 info->keep_memory);
8051 if (toc_relocs == NULL)
8052 goto error_ret;
8053
8054 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8055 {
8056 enum elf_ppc64_reloc_type r_type;
8057 unsigned long r_symndx;
8058 asection *sym_sec;
8059 struct elf_link_hash_entry *h;
8060 Elf_Internal_Sym *sym;
8061 bfd_vma val, addr;
8062
8063 r_type = ELF64_R_TYPE (rel->r_info);
8064 if (r_type != R_PPC64_ADDR64)
8065 continue;
8066
8067 r_symndx = ELF64_R_SYM (rel->r_info);
8068 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8069 r_symndx, ibfd))
8070 goto error_ret;
8071
8072 if (sym_sec == NULL
8073 || elf_discarded_section (sym_sec))
8074 continue;
8075
8076 if (!SYMBOL_CALLS_LOCAL (info, h))
8077 continue;
8078
8079 if (h != NULL)
8080 {
8081 if (h->type == STT_GNU_IFUNC)
8082 continue;
8083 val = h->root.u.def.value;
8084 }
8085 else
8086 {
8087 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8088 continue;
8089 val = sym->st_value;
8090 }
8091 val += rel->r_addend;
8092 val += sym_sec->output_section->vma + sym_sec->output_offset;
8093
8094 /* We don't yet know the exact toc pointer value, but we
8095 know it will be somewhere in the toc section. Don't
8096 optimize if the difference from any possible toc
8097 pointer is outside [ff..f80008000, 7fff7fff]. */
8098 addr = toc->output_section->vma + TOC_BASE_OFF;
8099 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8100 continue;
8101
8102 addr = toc->output_section->vma + toc->output_section->rawsize;
8103 if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32)
8104 continue;
8105
8106 if (skip == NULL)
8107 {
8108 skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8);
8109 if (skip == NULL)
8110 goto error_ret;
8111 }
8112
8113 skip[rel->r_offset >> 3]
8114 |= can_optimize | ((rel - toc_relocs) << 2);
8115 }
8116 }
8117
8118 if (skip == NULL)
8119 continue;
8120
8121 used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8);
8122 if (used == NULL)
8123 {
8124 error_ret:
8125 if (local_syms != NULL
8126 && symtab_hdr->contents != (unsigned char *) local_syms)
8127 free (local_syms);
8128 if (sec != NULL
8129 && relstart != NULL
8130 && elf_section_data (sec)->relocs != relstart)
8131 free (relstart);
8132 if (toc_relocs != NULL
8133 && elf_section_data (toc)->relocs != toc_relocs)
8134 free (toc_relocs);
8135 if (skip != NULL)
8136 free (skip);
8137 return FALSE;
8138 }
8139
8140 /* Now check all kept sections that might reference the toc.
8141 Check the toc itself last. */
8142 for (sec = (ibfd->sections == toc && toc->next ? toc->next
8143 : ibfd->sections);
8144 sec != NULL;
8145 sec = (sec == toc ? NULL
8146 : sec->next == NULL ? toc
8147 : sec->next == toc && toc->next ? toc->next
8148 : sec->next))
8149 {
8150 int repeat;
8151
8152 if (sec->reloc_count == 0
8153 || elf_discarded_section (sec)
8154 || get_opd_info (sec)
8155 || (sec->flags & SEC_ALLOC) == 0
8156 || (sec->flags & SEC_DEBUGGING) != 0)
8157 continue;
8158
8159 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8160 info->keep_memory);
8161 if (relstart == NULL)
8162 goto error_ret;
8163
8164 /* Mark toc entries referenced as used. */
8165 repeat = 0;
8166 do
8167 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8168 {
8169 enum elf_ppc64_reloc_type r_type;
8170 unsigned long r_symndx;
8171 asection *sym_sec;
8172 struct elf_link_hash_entry *h;
8173 Elf_Internal_Sym *sym;
8174 bfd_vma val;
8175
8176 r_type = ELF64_R_TYPE (rel->r_info);
8177 switch (r_type)
8178 {
8179 case R_PPC64_TOC16:
8180 case R_PPC64_TOC16_LO:
8181 case R_PPC64_TOC16_HI:
8182 case R_PPC64_TOC16_HA:
8183 case R_PPC64_TOC16_DS:
8184 case R_PPC64_TOC16_LO_DS:
8185 /* In case we're taking addresses of toc entries. */
8186 case R_PPC64_ADDR64:
8187 break;
8188
8189 default:
8190 continue;
8191 }
8192
8193 r_symndx = ELF64_R_SYM (rel->r_info);
8194 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8195 r_symndx, ibfd))
8196 {
8197 free (used);
8198 goto error_ret;
8199 }
8200
8201 if (sym_sec != toc)
8202 continue;
8203
8204 if (h != NULL)
8205 val = h->root.u.def.value;
8206 else
8207 val = sym->st_value;
8208 val += rel->r_addend;
8209
8210 if (val >= toc->size)
8211 continue;
8212
8213 if ((skip[val >> 3] & can_optimize) != 0)
8214 {
8215 bfd_vma off;
8216 unsigned char opc;
8217
8218 switch (r_type)
8219 {
8220 case R_PPC64_TOC16_HA:
8221 break;
8222
8223 case R_PPC64_TOC16_LO_DS:
8224 off = rel->r_offset + (bfd_big_endian (ibfd) ? -2 : 3);
8225 if (!bfd_get_section_contents (ibfd, sec, &opc, off, 1))
8226 return FALSE;
8227 if ((opc & (0x3f << 2)) == (58u << 2))
8228 break;
8229 /* Fall thru */
8230
8231 default:
8232 /* Wrong sort of reloc, or not a ld. We may
8233 as well clear ref_from_discarded too. */
8234 skip[val >> 3] = 0;
8235 }
8236 }
8237
8238 /* For the toc section, we only mark as used if
8239 this entry itself isn't unused. */
8240 if (sec == toc
8241 && !used[val >> 3]
8242 && (used[rel->r_offset >> 3]
8243 || !(skip[rel->r_offset >> 3] & ref_from_discarded)))
8244 /* Do all the relocs again, to catch reference
8245 chains. */
8246 repeat = 1;
8247
8248 used[val >> 3] = 1;
8249 }
8250 while (repeat);
8251
8252 if (elf_section_data (sec)->relocs != relstart)
8253 free (relstart);
8254 }
8255
8256 /* Merge the used and skip arrays. Assume that TOC
8257 doublewords not appearing as either used or unused belong
8258 to to an entry more than one doubleword in size. */
8259 for (drop = skip, keep = used, last = 0, some_unused = 0;
8260 drop < skip + (toc->size + 7) / 8;
8261 ++drop, ++keep)
8262 {
8263 if (*keep)
8264 {
8265 *drop &= ~ref_from_discarded;
8266 if ((*drop & can_optimize) != 0)
8267 some_unused = 1;
8268 last = 0;
8269 }
8270 else if (*drop)
8271 {
8272 some_unused = 1;
8273 last = ref_from_discarded;
8274 }
8275 else
8276 *drop = last;
8277 }
8278
8279 free (used);
8280
8281 if (some_unused)
8282 {
8283 bfd_byte *contents, *src;
8284 unsigned long off;
8285 Elf_Internal_Sym *sym;
8286 bfd_boolean local_toc_syms = FALSE;
8287
8288 /* Shuffle the toc contents, and at the same time convert the
8289 skip array from booleans into offsets. */
8290 if (!bfd_malloc_and_get_section (ibfd, toc, &contents))
8291 goto error_ret;
8292
8293 elf_section_data (toc)->this_hdr.contents = contents;
8294
8295 for (src = contents, off = 0, drop = skip;
8296 src < contents + toc->size;
8297 src += 8, ++drop)
8298 {
8299 if ((*drop & (can_optimize | ref_from_discarded)) != 0)
8300 off += 8;
8301 else if (off != 0)
8302 {
8303 *drop = off;
8304 memcpy (src - off, src, 8);
8305 }
8306 }
8307 *drop = off;
8308 toc->rawsize = toc->size;
8309 toc->size = src - contents - off;
8310
8311 /* Adjust addends for relocs against the toc section sym,
8312 and optimize any accesses we can. */
8313 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
8314 {
8315 if (sec->reloc_count == 0
8316 || elf_discarded_section (sec))
8317 continue;
8318
8319 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
8320 info->keep_memory);
8321 if (relstart == NULL)
8322 goto error_ret;
8323
8324 for (rel = relstart; rel < relstart + sec->reloc_count; ++rel)
8325 {
8326 enum elf_ppc64_reloc_type r_type;
8327 unsigned long r_symndx;
8328 asection *sym_sec;
8329 struct elf_link_hash_entry *h;
8330 bfd_vma val;
8331
8332 r_type = ELF64_R_TYPE (rel->r_info);
8333 switch (r_type)
8334 {
8335 default:
8336 continue;
8337
8338 case R_PPC64_TOC16:
8339 case R_PPC64_TOC16_LO:
8340 case R_PPC64_TOC16_HI:
8341 case R_PPC64_TOC16_HA:
8342 case R_PPC64_TOC16_DS:
8343 case R_PPC64_TOC16_LO_DS:
8344 case R_PPC64_ADDR64:
8345 break;
8346 }
8347
8348 r_symndx = ELF64_R_SYM (rel->r_info);
8349 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
8350 r_symndx, ibfd))
8351 goto error_ret;
8352
8353 if (sym_sec != toc)
8354 continue;
8355
8356 if (h != NULL)
8357 val = h->root.u.def.value;
8358 else
8359 {
8360 val = sym->st_value;
8361 if (val != 0)
8362 local_toc_syms = TRUE;
8363 }
8364
8365 val += rel->r_addend;
8366
8367 if (val > toc->rawsize)
8368 val = toc->rawsize;
8369 else if ((skip[val >> 3] & ref_from_discarded) != 0)
8370 continue;
8371 else if ((skip[val >> 3] & can_optimize) != 0)
8372 {
8373 Elf_Internal_Rela *tocrel
8374 = toc_relocs + (skip[val >> 3] >> 2);
8375 unsigned long tsym = ELF64_R_SYM (tocrel->r_info);
8376
8377 switch (r_type)
8378 {
8379 case R_PPC64_TOC16_HA:
8380 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA);
8381 break;
8382
8383 case R_PPC64_TOC16_LO_DS:
8384 rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT);
8385 break;
8386
8387 default:
8388 abort ();
8389 }
8390 rel->r_addend = tocrel->r_addend;
8391 elf_section_data (sec)->relocs = relstart;
8392 continue;
8393 }
8394
8395 if (h != NULL || sym->st_value != 0)
8396 continue;
8397
8398 rel->r_addend -= skip[val >> 3];
8399 elf_section_data (sec)->relocs = relstart;
8400 }
8401
8402 if (elf_section_data (sec)->relocs != relstart)
8403 free (relstart);
8404 }
8405
8406 /* We shouldn't have local or global symbols defined in the TOC,
8407 but handle them anyway. */
8408 if (local_syms != NULL)
8409 for (sym = local_syms;
8410 sym < local_syms + symtab_hdr->sh_info;
8411 ++sym)
8412 if (sym->st_value != 0
8413 && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc)
8414 {
8415 unsigned long i;
8416
8417 if (sym->st_value > toc->rawsize)
8418 i = toc->rawsize >> 3;
8419 else
8420 i = sym->st_value >> 3;
8421
8422 if ((skip[i] & (ref_from_discarded | can_optimize)) != 0)
8423 {
8424 if (local_toc_syms)
8425 (*_bfd_error_handler)
8426 (_("%s defined on removed toc entry"),
8427 bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL));
8428 do
8429 ++i;
8430 while ((skip[i] & (ref_from_discarded | can_optimize)));
8431 sym->st_value = (bfd_vma) i << 3;
8432 }
8433
8434 sym->st_value -= skip[i];
8435 symtab_hdr->contents = (unsigned char *) local_syms;
8436 }
8437
8438 /* Adjust any global syms defined in this toc input section. */
8439 if (toc_inf.global_toc_syms)
8440 {
8441 toc_inf.toc = toc;
8442 toc_inf.skip = skip;
8443 toc_inf.global_toc_syms = FALSE;
8444 elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms,
8445 &toc_inf);
8446 }
8447
8448 if (toc->reloc_count != 0)
8449 {
8450 Elf_Internal_Shdr *rel_hdr;
8451 Elf_Internal_Rela *wrel;
8452 bfd_size_type sz;
8453
8454 /* Remove unused toc relocs, and adjust those we keep. */
8455 if (toc_relocs == NULL)
8456 toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL,
8457 info->keep_memory);
8458 if (toc_relocs == NULL)
8459 goto error_ret;
8460
8461 wrel = toc_relocs;
8462 for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel)
8463 if ((skip[rel->r_offset >> 3]
8464 & (ref_from_discarded | can_optimize)) == 0)
8465 {
8466 wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3];
8467 wrel->r_info = rel->r_info;
8468 wrel->r_addend = rel->r_addend;
8469 ++wrel;
8470 }
8471 else if (!dec_dynrel_count (rel->r_info, toc, info,
8472 &local_syms, NULL, NULL))
8473 goto error_ret;
8474
8475 elf_section_data (toc)->relocs = toc_relocs;
8476 toc->reloc_count = wrel - toc_relocs;
8477 rel_hdr = _bfd_elf_single_rel_hdr (toc);
8478 sz = rel_hdr->sh_entsize;
8479 rel_hdr->sh_size = toc->reloc_count * sz;
8480 }
8481 }
8482 else if (toc_relocs != NULL
8483 && elf_section_data (toc)->relocs != toc_relocs)
8484 free (toc_relocs);
8485
8486 if (local_syms != NULL
8487 && symtab_hdr->contents != (unsigned char *) local_syms)
8488 {
8489 if (!info->keep_memory)
8490 free (local_syms);
8491 else
8492 symtab_hdr->contents = (unsigned char *) local_syms;
8493 }
8494 free (skip);
8495 }
8496
8497 return TRUE;
8498 }
8499
8500 /* Return true iff input section I references the TOC using
8501 instructions limited to +/-32k offsets. */
8502
8503 bfd_boolean
8504 ppc64_elf_has_small_toc_reloc (asection *i)
8505 {
8506 return (is_ppc64_elf (i->owner)
8507 && ppc64_elf_tdata (i->owner)->has_small_toc_reloc);
8508 }
8509
8510 /* Allocate space for one GOT entry. */
8511
8512 static void
8513 allocate_got (struct elf_link_hash_entry *h,
8514 struct bfd_link_info *info,
8515 struct got_entry *gent)
8516 {
8517 struct ppc_link_hash_table *htab = ppc_hash_table (info);
8518 bfd_boolean dyn;
8519 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) h;
8520 int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)
8521 ? 16 : 8);
8522 int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD
8523 ? 2 : 1) * sizeof (Elf64_External_Rela);
8524 asection *got = ppc64_elf_tdata (gent->owner)->got;
8525
8526 gent->got.offset = got->size;
8527 got->size += entsize;
8528
8529 dyn = htab->elf.dynamic_sections_created;
8530 if ((info->shared
8531 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8532 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8533 || h->root.type != bfd_link_hash_undefweak))
8534 {
8535 asection *relgot = ppc64_elf_tdata (gent->owner)->relgot;
8536 relgot->size += rentsize;
8537 }
8538 else if (h->type == STT_GNU_IFUNC)
8539 {
8540 asection *relgot = htab->reliplt;
8541 relgot->size += rentsize;
8542 htab->got_reli_size += rentsize;
8543 }
8544 }
8545
8546 /* This function merges got entries in the same toc group. */
8547
8548 static void
8549 merge_got_entries (struct got_entry **pent)
8550 {
8551 struct got_entry *ent, *ent2;
8552
8553 for (ent = *pent; ent != NULL; ent = ent->next)
8554 if (!ent->is_indirect)
8555 for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next)
8556 if (!ent2->is_indirect
8557 && ent2->addend == ent->addend
8558 && ent2->tls_type == ent->tls_type
8559 && elf_gp (ent2->owner) == elf_gp (ent->owner))
8560 {
8561 ent2->is_indirect = TRUE;
8562 ent2->got.ent = ent;
8563 }
8564 }
8565
8566 /* Allocate space in .plt, .got and associated reloc sections for
8567 dynamic relocs. */
8568
8569 static bfd_boolean
8570 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8571 {
8572 struct bfd_link_info *info;
8573 struct ppc_link_hash_table *htab;
8574 asection *s;
8575 struct ppc_link_hash_entry *eh;
8576 struct elf_dyn_relocs *p;
8577 struct got_entry **pgent, *gent;
8578
8579 if (h->root.type == bfd_link_hash_indirect)
8580 return TRUE;
8581
8582 info = (struct bfd_link_info *) inf;
8583 htab = ppc_hash_table (info);
8584 if (htab == NULL)
8585 return FALSE;
8586
8587 if ((htab->elf.dynamic_sections_created
8588 && h->dynindx != -1
8589 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
8590 || h->type == STT_GNU_IFUNC)
8591 {
8592 struct plt_entry *pent;
8593 bfd_boolean doneone = FALSE;
8594 for (pent = h->plt.plist; pent != NULL; pent = pent->next)
8595 if (pent->plt.refcount > 0)
8596 {
8597 if (!htab->elf.dynamic_sections_created
8598 || h->dynindx == -1)
8599 {
8600 s = htab->iplt;
8601 pent->plt.offset = s->size;
8602 s->size += PLT_ENTRY_SIZE;
8603 s = htab->reliplt;
8604 }
8605 else
8606 {
8607 /* If this is the first .plt entry, make room for the special
8608 first entry. */
8609 s = htab->plt;
8610 if (s->size == 0)
8611 s->size += PLT_INITIAL_ENTRY_SIZE;
8612
8613 pent->plt.offset = s->size;
8614
8615 /* Make room for this entry. */
8616 s->size += PLT_ENTRY_SIZE;
8617
8618 /* Make room for the .glink code. */
8619 s = htab->glink;
8620 if (s->size == 0)
8621 s->size += GLINK_CALL_STUB_SIZE;
8622 /* We need bigger stubs past index 32767. */
8623 if (s->size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
8624 s->size += 4;
8625 s->size += 2*4;
8626
8627 /* We also need to make an entry in the .rela.plt section. */
8628 s = htab->relplt;
8629 }
8630 s->size += sizeof (Elf64_External_Rela);
8631 doneone = TRUE;
8632 }
8633 else
8634 pent->plt.offset = (bfd_vma) -1;
8635 if (!doneone)
8636 {
8637 h->plt.plist = NULL;
8638 h->needs_plt = 0;
8639 }
8640 }
8641 else
8642 {
8643 h->plt.plist = NULL;
8644 h->needs_plt = 0;
8645 }
8646
8647 eh = (struct ppc_link_hash_entry *) h;
8648 /* Run through the TLS GD got entries first if we're changing them
8649 to TPREL. */
8650 if ((eh->tls_mask & TLS_TPRELGD) != 0)
8651 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8652 if (gent->got.refcount > 0
8653 && (gent->tls_type & TLS_GD) != 0)
8654 {
8655 /* This was a GD entry that has been converted to TPREL. If
8656 there happens to be a TPREL entry we can use that one. */
8657 struct got_entry *ent;
8658 for (ent = h->got.glist; ent != NULL; ent = ent->next)
8659 if (ent->got.refcount > 0
8660 && (ent->tls_type & TLS_TPREL) != 0
8661 && ent->addend == gent->addend
8662 && ent->owner == gent->owner)
8663 {
8664 gent->got.refcount = 0;
8665 break;
8666 }
8667
8668 /* If not, then we'll be using our own TPREL entry. */
8669 if (gent->got.refcount != 0)
8670 gent->tls_type = TLS_TLS | TLS_TPREL;
8671 }
8672
8673 /* Remove any list entry that won't generate a word in the GOT before
8674 we call merge_got_entries. Otherwise we risk merging to empty
8675 entries. */
8676 pgent = &h->got.glist;
8677 while ((gent = *pgent) != NULL)
8678 if (gent->got.refcount > 0)
8679 {
8680 if ((gent->tls_type & TLS_LD) != 0
8681 && !h->def_dynamic)
8682 {
8683 ppc64_tlsld_got (gent->owner)->got.refcount += 1;
8684 *pgent = gent->next;
8685 }
8686 else
8687 pgent = &gent->next;
8688 }
8689 else
8690 *pgent = gent->next;
8691
8692 if (!htab->do_multi_toc)
8693 merge_got_entries (&h->got.glist);
8694
8695 for (gent = h->got.glist; gent != NULL; gent = gent->next)
8696 if (!gent->is_indirect)
8697 {
8698 /* Make sure this symbol is output as a dynamic symbol.
8699 Undefined weak syms won't yet be marked as dynamic,
8700 nor will all TLS symbols. */
8701 if (h->dynindx == -1
8702 && !h->forced_local
8703 && h->type != STT_GNU_IFUNC
8704 && htab->elf.dynamic_sections_created)
8705 {
8706 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8707 return FALSE;
8708 }
8709
8710 if (!is_ppc64_elf (gent->owner))
8711 abort ();
8712
8713 allocate_got (h, info, gent);
8714 }
8715
8716 if (eh->dyn_relocs == NULL
8717 || (!htab->elf.dynamic_sections_created
8718 && h->type != STT_GNU_IFUNC))
8719 return TRUE;
8720
8721 /* In the shared -Bsymbolic case, discard space allocated for
8722 dynamic pc-relative relocs against symbols which turn out to be
8723 defined in regular objects. For the normal shared case, discard
8724 space for relocs that have become local due to symbol visibility
8725 changes. */
8726
8727 if (info->shared)
8728 {
8729 /* Relocs that use pc_count are those that appear on a call insn,
8730 or certain REL relocs (see must_be_dyn_reloc) that can be
8731 generated via assembly. We want calls to protected symbols to
8732 resolve directly to the function rather than going via the plt.
8733 If people want function pointer comparisons to work as expected
8734 then they should avoid writing weird assembly. */
8735 if (SYMBOL_CALLS_LOCAL (info, h))
8736 {
8737 struct elf_dyn_relocs **pp;
8738
8739 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
8740 {
8741 p->count -= p->pc_count;
8742 p->pc_count = 0;
8743 if (p->count == 0)
8744 *pp = p->next;
8745 else
8746 pp = &p->next;
8747 }
8748 }
8749
8750 /* Also discard relocs on undefined weak syms with non-default
8751 visibility. */
8752 if (eh->dyn_relocs != NULL
8753 && h->root.type == bfd_link_hash_undefweak)
8754 {
8755 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8756 eh->dyn_relocs = NULL;
8757
8758 /* Make sure this symbol is output as a dynamic symbol.
8759 Undefined weak syms won't yet be marked as dynamic. */
8760 else if (h->dynindx == -1
8761 && !h->forced_local)
8762 {
8763 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8764 return FALSE;
8765 }
8766 }
8767 }
8768 else if (h->type == STT_GNU_IFUNC)
8769 {
8770 if (!h->non_got_ref)
8771 eh->dyn_relocs = NULL;
8772 }
8773 else if (ELIMINATE_COPY_RELOCS)
8774 {
8775 /* For the non-shared case, discard space for relocs against
8776 symbols which turn out to need copy relocs or are not
8777 dynamic. */
8778
8779 if (!h->non_got_ref
8780 && !h->def_regular)
8781 {
8782 /* Make sure this symbol is output as a dynamic symbol.
8783 Undefined weak syms won't yet be marked as dynamic. */
8784 if (h->dynindx == -1
8785 && !h->forced_local)
8786 {
8787 if (! bfd_elf_link_record_dynamic_symbol (info, h))
8788 return FALSE;
8789 }
8790
8791 /* If that succeeded, we know we'll be keeping all the
8792 relocs. */
8793 if (h->dynindx != -1)
8794 goto keep;
8795 }
8796
8797 eh->dyn_relocs = NULL;
8798
8799 keep: ;
8800 }
8801
8802 /* Finally, allocate space. */
8803 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8804 {
8805 asection *sreloc = elf_section_data (p->sec)->sreloc;
8806 if (!htab->elf.dynamic_sections_created)
8807 sreloc = htab->reliplt;
8808 sreloc->size += p->count * sizeof (Elf64_External_Rela);
8809 }
8810
8811 return TRUE;
8812 }
8813
8814 /* Find any dynamic relocs that apply to read-only sections. */
8815
8816 static bfd_boolean
8817 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8818 {
8819 struct ppc_link_hash_entry *eh;
8820 struct elf_dyn_relocs *p;
8821
8822 eh = (struct ppc_link_hash_entry *) h;
8823 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8824 {
8825 asection *s = p->sec->output_section;
8826
8827 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8828 {
8829 struct bfd_link_info *info = inf;
8830
8831 info->flags |= DF_TEXTREL;
8832
8833 /* Not an error, just cut short the traversal. */
8834 return FALSE;
8835 }
8836 }
8837 return TRUE;
8838 }
8839
8840 /* Set the sizes of the dynamic sections. */
8841
8842 static bfd_boolean
8843 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8844 struct bfd_link_info *info)
8845 {
8846 struct ppc_link_hash_table *htab;
8847 bfd *dynobj;
8848 asection *s;
8849 bfd_boolean relocs;
8850 bfd *ibfd;
8851 struct got_entry *first_tlsld;
8852
8853 htab = ppc_hash_table (info);
8854 if (htab == NULL)
8855 return FALSE;
8856
8857 dynobj = htab->elf.dynobj;
8858 if (dynobj == NULL)
8859 abort ();
8860
8861 if (htab->elf.dynamic_sections_created)
8862 {
8863 /* Set the contents of the .interp section to the interpreter. */
8864 if (info->executable)
8865 {
8866 s = bfd_get_section_by_name (dynobj, ".interp");
8867 if (s == NULL)
8868 abort ();
8869 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8870 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8871 }
8872 }
8873
8874 /* Set up .got offsets for local syms, and space for local dynamic
8875 relocs. */
8876 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8877 {
8878 struct got_entry **lgot_ents;
8879 struct got_entry **end_lgot_ents;
8880 struct plt_entry **local_plt;
8881 struct plt_entry **end_local_plt;
8882 unsigned char *lgot_masks;
8883 bfd_size_type locsymcount;
8884 Elf_Internal_Shdr *symtab_hdr;
8885 asection *srel;
8886
8887 if (!is_ppc64_elf (ibfd))
8888 continue;
8889
8890 for (s = ibfd->sections; s != NULL; s = s->next)
8891 {
8892 struct elf_dyn_relocs *p;
8893
8894 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
8895 {
8896 if (!bfd_is_abs_section (p->sec)
8897 && bfd_is_abs_section (p->sec->output_section))
8898 {
8899 /* Input section has been discarded, either because
8900 it is a copy of a linkonce section or due to
8901 linker script /DISCARD/, so we'll be discarding
8902 the relocs too. */
8903 }
8904 else if (p->count != 0)
8905 {
8906 srel = elf_section_data (p->sec)->sreloc;
8907 if (!htab->elf.dynamic_sections_created)
8908 srel = htab->reliplt;
8909 srel->size += p->count * sizeof (Elf64_External_Rela);
8910 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8911 info->flags |= DF_TEXTREL;
8912 }
8913 }
8914 }
8915
8916 lgot_ents = elf_local_got_ents (ibfd);
8917 if (!lgot_ents)
8918 continue;
8919
8920 symtab_hdr = &elf_symtab_hdr (ibfd);
8921 locsymcount = symtab_hdr->sh_info;
8922 end_lgot_ents = lgot_ents + locsymcount;
8923 local_plt = (struct plt_entry **) end_lgot_ents;
8924 end_local_plt = local_plt + locsymcount;
8925 lgot_masks = (unsigned char *) end_local_plt;
8926 s = ppc64_elf_tdata (ibfd)->got;
8927 srel = ppc64_elf_tdata (ibfd)->relgot;
8928 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
8929 {
8930 struct got_entry **pent, *ent;
8931
8932 pent = lgot_ents;
8933 while ((ent = *pent) != NULL)
8934 if (ent->got.refcount > 0)
8935 {
8936 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0)
8937 {
8938 ppc64_tlsld_got (ibfd)->got.refcount += 1;
8939 *pent = ent->next;
8940 }
8941 else
8942 {
8943 unsigned int num = 1;
8944 ent->got.offset = s->size;
8945 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
8946 num = 2;
8947 s->size += num * 8;
8948 if (info->shared)
8949 srel->size += num * sizeof (Elf64_External_Rela);
8950 else if ((*lgot_masks & PLT_IFUNC) != 0)
8951 {
8952 htab->reliplt->size
8953 += num * sizeof (Elf64_External_Rela);
8954 htab->got_reli_size
8955 += num * sizeof (Elf64_External_Rela);
8956 }
8957 pent = &ent->next;
8958 }
8959 }
8960 else
8961 *pent = ent->next;
8962 }
8963
8964 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
8965 for (; local_plt < end_local_plt; ++local_plt)
8966 {
8967 struct plt_entry *ent;
8968
8969 for (ent = *local_plt; ent != NULL; ent = ent->next)
8970 if (ent->plt.refcount > 0)
8971 {
8972 s = htab->iplt;
8973 ent->plt.offset = s->size;
8974 s->size += PLT_ENTRY_SIZE;
8975
8976 htab->reliplt->size += sizeof (Elf64_External_Rela);
8977 }
8978 else
8979 ent->plt.offset = (bfd_vma) -1;
8980 }
8981 }
8982
8983 /* Allocate global sym .plt and .got entries, and space for global
8984 sym dynamic relocs. */
8985 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
8986
8987 first_tlsld = NULL;
8988 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
8989 {
8990 struct got_entry *ent;
8991
8992 if (!is_ppc64_elf (ibfd))
8993 continue;
8994
8995 ent = ppc64_tlsld_got (ibfd);
8996 if (ent->got.refcount > 0)
8997 {
8998 if (!htab->do_multi_toc && first_tlsld != NULL)
8999 {
9000 ent->is_indirect = TRUE;
9001 ent->got.ent = first_tlsld;
9002 }
9003 else
9004 {
9005 if (first_tlsld == NULL)
9006 first_tlsld = ent;
9007 s = ppc64_elf_tdata (ibfd)->got;
9008 ent->got.offset = s->size;
9009 ent->owner = ibfd;
9010 s->size += 16;
9011 if (info->shared)
9012 {
9013 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
9014 srel->size += sizeof (Elf64_External_Rela);
9015 }
9016 }
9017 }
9018 else
9019 ent->got.offset = (bfd_vma) -1;
9020 }
9021
9022 /* We now have determined the sizes of the various dynamic sections.
9023 Allocate memory for them. */
9024 relocs = FALSE;
9025 for (s = dynobj->sections; s != NULL; s = s->next)
9026 {
9027 if ((s->flags & SEC_LINKER_CREATED) == 0)
9028 continue;
9029
9030 if (s == htab->brlt || s == htab->relbrlt)
9031 /* These haven't been allocated yet; don't strip. */
9032 continue;
9033 else if (s == htab->got
9034 || s == htab->plt
9035 || s == htab->iplt
9036 || s == htab->glink
9037 || s == htab->dynbss)
9038 {
9039 /* Strip this section if we don't need it; see the
9040 comment below. */
9041 }
9042 else if (s == htab->glink_eh_frame)
9043 {
9044 if (!bfd_is_abs_section (s->output_section))
9045 /* Not sized yet. */
9046 continue;
9047 }
9048 else if (CONST_STRNEQ (s->name, ".rela"))
9049 {
9050 if (s->size != 0)
9051 {
9052 if (s != htab->relplt)
9053 relocs = TRUE;
9054
9055 /* We use the reloc_count field as a counter if we need
9056 to copy relocs into the output file. */
9057 s->reloc_count = 0;
9058 }
9059 }
9060 else
9061 {
9062 /* It's not one of our sections, so don't allocate space. */
9063 continue;
9064 }
9065
9066 if (s->size == 0)
9067 {
9068 /* If we don't need this section, strip it from the
9069 output file. This is mostly to handle .rela.bss and
9070 .rela.plt. We must create both sections in
9071 create_dynamic_sections, because they must be created
9072 before the linker maps input sections to output
9073 sections. The linker does that before
9074 adjust_dynamic_symbol is called, and it is that
9075 function which decides whether anything needs to go
9076 into these sections. */
9077 s->flags |= SEC_EXCLUDE;
9078 continue;
9079 }
9080
9081 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9082 continue;
9083
9084 /* Allocate memory for the section contents. We use bfd_zalloc
9085 here in case unused entries are not reclaimed before the
9086 section's contents are written out. This should not happen,
9087 but this way if it does we get a R_PPC64_NONE reloc in .rela
9088 sections instead of garbage.
9089 We also rely on the section contents being zero when writing
9090 the GOT. */
9091 s->contents = bfd_zalloc (dynobj, s->size);
9092 if (s->contents == NULL)
9093 return FALSE;
9094 }
9095
9096 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
9097 {
9098 if (!is_ppc64_elf (ibfd))
9099 continue;
9100
9101 s = ppc64_elf_tdata (ibfd)->got;
9102 if (s != NULL && s != htab->got)
9103 {
9104 if (s->size == 0)
9105 s->flags |= SEC_EXCLUDE;
9106 else
9107 {
9108 s->contents = bfd_zalloc (ibfd, s->size);
9109 if (s->contents == NULL)
9110 return FALSE;
9111 }
9112 }
9113 s = ppc64_elf_tdata (ibfd)->relgot;
9114 if (s != NULL)
9115 {
9116 if (s->size == 0)
9117 s->flags |= SEC_EXCLUDE;
9118 else
9119 {
9120 s->contents = bfd_zalloc (ibfd, s->size);
9121 if (s->contents == NULL)
9122 return FALSE;
9123 relocs = TRUE;
9124 s->reloc_count = 0;
9125 }
9126 }
9127 }
9128
9129 if (htab->elf.dynamic_sections_created)
9130 {
9131 /* Add some entries to the .dynamic section. We fill in the
9132 values later, in ppc64_elf_finish_dynamic_sections, but we
9133 must add the entries now so that we get the correct size for
9134 the .dynamic section. The DT_DEBUG entry is filled in by the
9135 dynamic linker and used by the debugger. */
9136 #define add_dynamic_entry(TAG, VAL) \
9137 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9138
9139 if (info->executable)
9140 {
9141 if (!add_dynamic_entry (DT_DEBUG, 0))
9142 return FALSE;
9143 }
9144
9145 if (htab->plt != NULL && htab->plt->size != 0)
9146 {
9147 if (!add_dynamic_entry (DT_PLTGOT, 0)
9148 || !add_dynamic_entry (DT_PLTRELSZ, 0)
9149 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
9150 || !add_dynamic_entry (DT_JMPREL, 0)
9151 || !add_dynamic_entry (DT_PPC64_GLINK, 0))
9152 return FALSE;
9153 }
9154
9155 if (NO_OPD_RELOCS)
9156 {
9157 if (!add_dynamic_entry (DT_PPC64_OPD, 0)
9158 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
9159 return FALSE;
9160 }
9161
9162 if (!htab->no_tls_get_addr_opt
9163 && htab->tls_get_addr_fd != NULL
9164 && htab->tls_get_addr_fd->elf.plt.plist != NULL
9165 && !add_dynamic_entry (DT_PPC64_TLSOPT, 0))
9166 return FALSE;
9167
9168 if (relocs)
9169 {
9170 if (!add_dynamic_entry (DT_RELA, 0)
9171 || !add_dynamic_entry (DT_RELASZ, 0)
9172 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
9173 return FALSE;
9174
9175 /* If any dynamic relocs apply to a read-only section,
9176 then we need a DT_TEXTREL entry. */
9177 if ((info->flags & DF_TEXTREL) == 0)
9178 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
9179
9180 if ((info->flags & DF_TEXTREL) != 0)
9181 {
9182 if (!add_dynamic_entry (DT_TEXTREL, 0))
9183 return FALSE;
9184 }
9185 }
9186 }
9187 #undef add_dynamic_entry
9188
9189 return TRUE;
9190 }
9191
9192 /* Determine the type of stub needed, if any, for a call. */
9193
9194 static inline enum ppc_stub_type
9195 ppc_type_of_stub (asection *input_sec,
9196 const Elf_Internal_Rela *rel,
9197 struct ppc_link_hash_entry **hash,
9198 struct plt_entry **plt_ent,
9199 bfd_vma destination)
9200 {
9201 struct ppc_link_hash_entry *h = *hash;
9202 bfd_vma location;
9203 bfd_vma branch_offset;
9204 bfd_vma max_branch_offset;
9205 enum elf_ppc64_reloc_type r_type;
9206
9207 if (h != NULL)
9208 {
9209 struct plt_entry *ent;
9210 struct ppc_link_hash_entry *fdh = h;
9211 if (h->oh != NULL
9212 && h->oh->is_func_descriptor)
9213 {
9214 fdh = ppc_follow_link (h->oh);
9215 *hash = fdh;
9216 }
9217
9218 for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next)
9219 if (ent->addend == rel->r_addend
9220 && ent->plt.offset != (bfd_vma) -1)
9221 {
9222 *plt_ent = ent;
9223 return ppc_stub_plt_call;
9224 }
9225
9226 /* Here, we know we don't have a plt entry. If we don't have a
9227 either a defined function descriptor or a defined entry symbol
9228 in a regular object file, then it is pointless trying to make
9229 any other type of stub. */
9230 if (!is_static_defined (&fdh->elf)
9231 && !is_static_defined (&h->elf))
9232 return ppc_stub_none;
9233 }
9234 else if (elf_local_got_ents (input_sec->owner) != NULL)
9235 {
9236 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner);
9237 struct plt_entry **local_plt = (struct plt_entry **)
9238 elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info;
9239 unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
9240
9241 if (local_plt[r_symndx] != NULL)
9242 {
9243 struct plt_entry *ent;
9244
9245 for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next)
9246 if (ent->addend == rel->r_addend
9247 && ent->plt.offset != (bfd_vma) -1)
9248 {
9249 *plt_ent = ent;
9250 return ppc_stub_plt_call;
9251 }
9252 }
9253 }
9254
9255 /* Determine where the call point is. */
9256 location = (input_sec->output_offset
9257 + input_sec->output_section->vma
9258 + rel->r_offset);
9259
9260 branch_offset = destination - location;
9261 r_type = ELF64_R_TYPE (rel->r_info);
9262
9263 /* Determine if a long branch stub is needed. */
9264 max_branch_offset = 1 << 25;
9265 if (r_type != R_PPC64_REL24)
9266 max_branch_offset = 1 << 15;
9267
9268 if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
9269 /* We need a stub. Figure out whether a long_branch or plt_branch
9270 is needed later. */
9271 return ppc_stub_long_branch;
9272
9273 return ppc_stub_none;
9274 }
9275
9276 /* Build a .plt call stub. */
9277
9278 static inline bfd_byte *
9279 build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r,
9280 bfd_boolean plt_static_chain)
9281 {
9282 #define PPC_LO(v) ((v) & 0xffff)
9283 #define PPC_HI(v) (((v) >> 16) & 0xffff)
9284 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
9285
9286 if (PPC_HA (offset) != 0)
9287 {
9288 if (r != NULL)
9289 {
9290 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9291 r[1].r_offset = r[0].r_offset + 8;
9292 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9293 r[1].r_addend = r[0].r_addend;
9294 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9295 {
9296 r[2].r_offset = r[1].r_offset + 4;
9297 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO);
9298 r[2].r_addend = r[0].r_addend;
9299 }
9300 else
9301 {
9302 r[2].r_offset = r[1].r_offset + 8;
9303 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9304 r[2].r_addend = r[0].r_addend + 8;
9305 if (plt_static_chain)
9306 {
9307 r[3].r_offset = r[2].r_offset + 4;
9308 r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9309 r[3].r_addend = r[0].r_addend + 16;
9310 }
9311 }
9312 }
9313 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
9314 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9315 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
9316 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9317 {
9318 bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
9319 offset = 0;
9320 }
9321 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9322 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
9323 if (plt_static_chain)
9324 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
9325 bfd_put_32 (obfd, BCTR, p), p += 4;
9326 }
9327 else
9328 {
9329 if (r != NULL)
9330 {
9331 r[0].r_offset += 4;
9332 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9333 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9334 {
9335 r[1].r_offset = r[0].r_offset + 4;
9336 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16);
9337 r[1].r_addend = r[0].r_addend;
9338 }
9339 else
9340 {
9341 r[1].r_offset = r[0].r_offset + 8;
9342 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9343 r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain;
9344 if (plt_static_chain)
9345 {
9346 r[2].r_offset = r[1].r_offset + 4;
9347 r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9348 r[2].r_addend = r[0].r_addend + 8;
9349 }
9350 }
9351 }
9352 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
9353 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
9354 if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
9355 {
9356 bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
9357 offset = 0;
9358 }
9359 bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
9360 if (plt_static_chain)
9361 bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
9362 bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
9363 bfd_put_32 (obfd, BCTR, p), p += 4;
9364 }
9365 return p;
9366 }
9367
9368 /* Build a special .plt call stub for __tls_get_addr. */
9369
9370 #define LD_R11_0R3 0xe9630000
9371 #define LD_R12_0R3 0xe9830000
9372 #define MR_R0_R3 0x7c601b78
9373 #define CMPDI_R11_0 0x2c2b0000
9374 #define ADD_R3_R12_R13 0x7c6c6a14
9375 #define BEQLR 0x4d820020
9376 #define MR_R3_R0 0x7c030378
9377 #define MFLR_R11 0x7d6802a6
9378 #define STD_R11_0R1 0xf9610000
9379 #define BCTRL 0x4e800421
9380 #define LD_R11_0R1 0xe9610000
9381 #define LD_R2_0R1 0xe8410000
9382 #define MTLR_R11 0x7d6803a6
9383
9384 static inline bfd_byte *
9385 build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
9386 Elf_Internal_Rela *r, bfd_boolean plt_static_chain)
9387 {
9388 bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
9389 bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
9390 bfd_put_32 (obfd, MR_R0_R3, p), p += 4;
9391 bfd_put_32 (obfd, CMPDI_R11_0, p), p += 4;
9392 bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4;
9393 bfd_put_32 (obfd, BEQLR, p), p += 4;
9394 bfd_put_32 (obfd, MR_R3_R0, p), p += 4;
9395 bfd_put_32 (obfd, MFLR_R11, p), p += 4;
9396 bfd_put_32 (obfd, STD_R11_0R1 + 32, p), p += 4;
9397
9398 if (r != NULL)
9399 r[0].r_offset += 9 * 4;
9400 p = build_plt_stub (obfd, p, offset, r, plt_static_chain);
9401 bfd_put_32 (obfd, BCTRL, p - 4);
9402
9403 bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
9404 bfd_put_32 (obfd, LD_R2_0R1 + 40, p), p += 4;
9405 bfd_put_32 (obfd, MTLR_R11, p), p += 4;
9406 bfd_put_32 (obfd, BLR, p), p += 4;
9407
9408 return p;
9409 }
9410
9411 static Elf_Internal_Rela *
9412 get_relocs (asection *sec, int count)
9413 {
9414 Elf_Internal_Rela *relocs;
9415 struct bfd_elf_section_data *elfsec_data;
9416
9417 elfsec_data = elf_section_data (sec);
9418 relocs = elfsec_data->relocs;
9419 if (relocs == NULL)
9420 {
9421 bfd_size_type relsize;
9422 relsize = sec->reloc_count * sizeof (*relocs);
9423 relocs = bfd_alloc (sec->owner, relsize);
9424 if (relocs == NULL)
9425 return NULL;
9426 elfsec_data->relocs = relocs;
9427 elfsec_data->rela.hdr = bfd_zalloc (sec->owner,
9428 sizeof (Elf_Internal_Shdr));
9429 if (elfsec_data->rela.hdr == NULL)
9430 return NULL;
9431 elfsec_data->rela.hdr->sh_size = (sec->reloc_count
9432 * sizeof (Elf64_External_Rela));
9433 elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela);
9434 sec->reloc_count = 0;
9435 }
9436 relocs += sec->reloc_count;
9437 sec->reloc_count += count;
9438 return relocs;
9439 }
9440
9441 static bfd_vma
9442 get_r2off (struct bfd_link_info *info,
9443 struct ppc_stub_hash_entry *stub_entry)
9444 {
9445 struct ppc_link_hash_table *htab = ppc_hash_table (info);
9446 bfd_vma r2off = htab->stub_group[stub_entry->target_section->id].toc_off;
9447
9448 if (r2off == 0)
9449 {
9450 /* Support linking -R objects. Get the toc pointer from the
9451 opd entry. */
9452 char buf[8];
9453 asection *opd = stub_entry->h->elf.root.u.def.section;
9454 bfd_vma opd_off = stub_entry->h->elf.root.u.def.value;
9455
9456 if (strcmp (opd->name, ".opd") != 0
9457 || opd->reloc_count != 0)
9458 {
9459 info->callbacks->einfo (_("cannot find opd entry toc for %s\n"),
9460 stub_entry->h->elf.root.root.string);
9461 bfd_set_error (bfd_error_bad_value);
9462 return 0;
9463 }
9464 if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8))
9465 return 0;
9466 r2off = bfd_get_64 (opd->owner, buf);
9467 r2off -= elf_gp (info->output_bfd);
9468 }
9469 r2off -= htab->stub_group[stub_entry->id_sec->id].toc_off;
9470 return r2off;
9471 }
9472
9473 static bfd_boolean
9474 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9475 {
9476 struct ppc_stub_hash_entry *stub_entry;
9477 struct ppc_branch_hash_entry *br_entry;
9478 struct bfd_link_info *info;
9479 struct ppc_link_hash_table *htab;
9480 bfd_byte *loc;
9481 bfd_byte *p;
9482 bfd_vma dest, off;
9483 int size;
9484 Elf_Internal_Rela *r;
9485 asection *plt;
9486
9487 /* Massage our args to the form they really have. */
9488 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9489 info = in_arg;
9490
9491 htab = ppc_hash_table (info);
9492 if (htab == NULL)
9493 return FALSE;
9494
9495 /* Make a note of the offset within the stubs for this entry. */
9496 stub_entry->stub_offset = stub_entry->stub_sec->size;
9497 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset;
9498
9499 htab->stub_count[stub_entry->stub_type - 1] += 1;
9500 switch (stub_entry->stub_type)
9501 {
9502 case ppc_stub_long_branch:
9503 case ppc_stub_long_branch_r2off:
9504 /* Branches are relative. This is where we are going to. */
9505 off = dest = (stub_entry->target_value
9506 + stub_entry->target_section->output_offset
9507 + stub_entry->target_section->output_section->vma);
9508
9509 /* And this is where we are coming from. */
9510 off -= (stub_entry->stub_offset
9511 + stub_entry->stub_sec->output_offset
9512 + stub_entry->stub_sec->output_section->vma);
9513
9514 size = 4;
9515 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9516 {
9517 bfd_vma r2off = get_r2off (info, stub_entry);
9518
9519 if (r2off == 0)
9520 {
9521 htab->stub_error = TRUE;
9522 return FALSE;
9523 }
9524 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9525 loc += 4;
9526 size = 12;
9527 if (PPC_HA (r2off) != 0)
9528 {
9529 size = 16;
9530 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9531 loc += 4;
9532 }
9533 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9534 loc += 4;
9535 off -= size - 4;
9536 }
9537 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc);
9538
9539 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9540 {
9541 info->callbacks->einfo (_("long branch stub `%s' offset overflow\n"),
9542 stub_entry->root.string);
9543 htab->stub_error = TRUE;
9544 return FALSE;
9545 }
9546
9547 if (info->emitrelocations)
9548 {
9549 r = get_relocs (stub_entry->stub_sec, 1);
9550 if (r == NULL)
9551 return FALSE;
9552 r->r_offset = loc - stub_entry->stub_sec->contents;
9553 r->r_info = ELF64_R_INFO (0, R_PPC64_REL24);
9554 r->r_addend = dest;
9555 if (stub_entry->h != NULL)
9556 {
9557 struct elf_link_hash_entry **hashes;
9558 unsigned long symndx;
9559 struct ppc_link_hash_entry *h;
9560
9561 hashes = elf_sym_hashes (htab->stub_bfd);
9562 if (hashes == NULL)
9563 {
9564 bfd_size_type hsize;
9565
9566 hsize = (htab->stub_globals + 1) * sizeof (*hashes);
9567 hashes = bfd_zalloc (htab->stub_bfd, hsize);
9568 if (hashes == NULL)
9569 return FALSE;
9570 elf_sym_hashes (htab->stub_bfd) = hashes;
9571 htab->stub_globals = 1;
9572 }
9573 symndx = htab->stub_globals++;
9574 h = stub_entry->h;
9575 hashes[symndx] = &h->elf;
9576 r->r_info = ELF64_R_INFO (symndx, R_PPC64_REL24);
9577 if (h->oh != NULL && h->oh->is_func)
9578 h = ppc_follow_link (h->oh);
9579 if (h->elf.root.u.def.section != stub_entry->target_section)
9580 /* H is an opd symbol. The addend must be zero. */
9581 r->r_addend = 0;
9582 else
9583 {
9584 off = (h->elf.root.u.def.value
9585 + h->elf.root.u.def.section->output_offset
9586 + h->elf.root.u.def.section->output_section->vma);
9587 r->r_addend -= off;
9588 }
9589 }
9590 }
9591 break;
9592
9593 case ppc_stub_plt_branch:
9594 case ppc_stub_plt_branch_r2off:
9595 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9596 stub_entry->root.string + 9,
9597 FALSE, FALSE);
9598 if (br_entry == NULL)
9599 {
9600 info->callbacks->einfo (_("can't find branch stub `%s'\n"),
9601 stub_entry->root.string);
9602 htab->stub_error = TRUE;
9603 return FALSE;
9604 }
9605
9606 dest = (stub_entry->target_value
9607 + stub_entry->target_section->output_offset
9608 + stub_entry->target_section->output_section->vma);
9609
9610 bfd_put_64 (htab->brlt->owner, dest,
9611 htab->brlt->contents + br_entry->offset);
9612
9613 if (br_entry->iter == htab->stub_iteration)
9614 {
9615 br_entry->iter = 0;
9616
9617 if (htab->relbrlt != NULL)
9618 {
9619 /* Create a reloc for the branch lookup table entry. */
9620 Elf_Internal_Rela rela;
9621 bfd_byte *rl;
9622
9623 rela.r_offset = (br_entry->offset
9624 + htab->brlt->output_offset
9625 + htab->brlt->output_section->vma);
9626 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9627 rela.r_addend = dest;
9628
9629 rl = htab->relbrlt->contents;
9630 rl += (htab->relbrlt->reloc_count++
9631 * sizeof (Elf64_External_Rela));
9632 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl);
9633 }
9634 else if (info->emitrelocations)
9635 {
9636 r = get_relocs (htab->brlt, 1);
9637 if (r == NULL)
9638 return FALSE;
9639 /* brlt, being SEC_LINKER_CREATED does not go through the
9640 normal reloc processing. Symbols and offsets are not
9641 translated from input file to output file form, so
9642 set up the offset per the output file. */
9643 r->r_offset = (br_entry->offset
9644 + htab->brlt->output_offset
9645 + htab->brlt->output_section->vma);
9646 r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
9647 r->r_addend = dest;
9648 }
9649 }
9650
9651 dest = (br_entry->offset
9652 + htab->brlt->output_offset
9653 + htab->brlt->output_section->vma);
9654
9655 off = (dest
9656 - elf_gp (htab->brlt->output_section->owner)
9657 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9658
9659 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9660 {
9661 info->callbacks->einfo
9662 (_("linkage table error against `%s'\n"),
9663 stub_entry->root.string);
9664 bfd_set_error (bfd_error_bad_value);
9665 htab->stub_error = TRUE;
9666 return FALSE;
9667 }
9668
9669 if (info->emitrelocations)
9670 {
9671 r = get_relocs (stub_entry->stub_sec, 1 + (PPC_HA (off) != 0));
9672 if (r == NULL)
9673 return FALSE;
9674 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9675 if (bfd_big_endian (info->output_bfd))
9676 r[0].r_offset += 2;
9677 if (stub_entry->stub_type == ppc_stub_plt_branch_r2off)
9678 r[0].r_offset += 4;
9679 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS);
9680 r[0].r_addend = dest;
9681 if (PPC_HA (off) != 0)
9682 {
9683 r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA);
9684 r[1].r_offset = r[0].r_offset + 4;
9685 r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS);
9686 r[1].r_addend = r[0].r_addend;
9687 }
9688 }
9689
9690 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
9691 {
9692 if (PPC_HA (off) != 0)
9693 {
9694 size = 16;
9695 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9696 loc += 4;
9697 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9698 }
9699 else
9700 {
9701 size = 12;
9702 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9703 }
9704 }
9705 else
9706 {
9707 bfd_vma r2off = get_r2off (info, stub_entry);
9708
9709 if (r2off == 0)
9710 {
9711 htab->stub_error = TRUE;
9712 return FALSE;
9713 }
9714
9715 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc);
9716 loc += 4;
9717 size = 20;
9718 if (PPC_HA (off) != 0)
9719 {
9720 size += 4;
9721 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (off), loc);
9722 loc += 4;
9723 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (off), loc);
9724 loc += 4;
9725 }
9726 else
9727 {
9728 bfd_put_32 (htab->stub_bfd, LD_R11_0R2 | PPC_LO (off), loc);
9729 loc += 4;
9730 }
9731
9732 if (PPC_HA (r2off) != 0)
9733 {
9734 size += 4;
9735 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc);
9736 loc += 4;
9737 }
9738 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc);
9739 }
9740 loc += 4;
9741 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc);
9742 loc += 4;
9743 bfd_put_32 (htab->stub_bfd, BCTR, loc);
9744 break;
9745
9746 case ppc_stub_plt_call:
9747 if (stub_entry->h != NULL
9748 && stub_entry->h->is_func_descriptor
9749 && stub_entry->h->oh != NULL)
9750 {
9751 struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh);
9752
9753 /* If the old-ABI "dot-symbol" is undefined make it weak so
9754 we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL.
9755 FIXME: We used to define the symbol on one of the call
9756 stubs instead, which is why we test symbol section id
9757 against htab->top_id in various places. Likely all
9758 these checks could now disappear. */
9759 if (fh->elf.root.type == bfd_link_hash_undefined)
9760 fh->elf.root.type = bfd_link_hash_undefweak;
9761 /* Stop undo_symbol_twiddle changing it back to undefined. */
9762 fh->was_undefined = 0;
9763 }
9764
9765 /* Now build the stub. */
9766 dest = stub_entry->plt_ent->plt.offset & ~1;
9767 if (dest >= (bfd_vma) -2)
9768 abort ();
9769
9770 plt = htab->plt;
9771 if (!htab->elf.dynamic_sections_created
9772 || stub_entry->h == NULL
9773 || stub_entry->h->elf.dynindx == -1)
9774 plt = htab->iplt;
9775
9776 dest += plt->output_offset + plt->output_section->vma;
9777
9778 if (stub_entry->h == NULL
9779 && (stub_entry->plt_ent->plt.offset & 1) == 0)
9780 {
9781 Elf_Internal_Rela rela;
9782 bfd_byte *rl;
9783
9784 rela.r_offset = dest;
9785 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
9786 rela.r_addend = (stub_entry->target_value
9787 + stub_entry->target_section->output_offset
9788 + stub_entry->target_section->output_section->vma);
9789
9790 rl = (htab->reliplt->contents
9791 + (htab->reliplt->reloc_count++
9792 * sizeof (Elf64_External_Rela)));
9793 bfd_elf64_swap_reloca_out (info->output_bfd, &rela, rl);
9794 stub_entry->plt_ent->plt.offset |= 1;
9795 }
9796
9797 off = (dest
9798 - elf_gp (plt->output_section->owner)
9799 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9800
9801 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
9802 {
9803 info->callbacks->einfo
9804 (_("linkage table error against `%s'\n"),
9805 stub_entry->h != NULL
9806 ? stub_entry->h->elf.root.root.string
9807 : "<local sym>");
9808 bfd_set_error (bfd_error_bad_value);
9809 htab->stub_error = TRUE;
9810 return FALSE;
9811 }
9812
9813 r = NULL;
9814 if (info->emitrelocations)
9815 {
9816 r = get_relocs (stub_entry->stub_sec,
9817 (2
9818 + (PPC_HA (off) != 0)
9819 + (htab->plt_static_chain
9820 && PPC_HA (off + 16) == PPC_HA (off))));
9821 if (r == NULL)
9822 return FALSE;
9823 r[0].r_offset = loc - stub_entry->stub_sec->contents;
9824 if (bfd_big_endian (info->output_bfd))
9825 r[0].r_offset += 2;
9826 r[0].r_addend = dest;
9827 }
9828 if (stub_entry->h != NULL
9829 && (stub_entry->h == htab->tls_get_addr_fd
9830 || stub_entry->h == htab->tls_get_addr)
9831 && !htab->no_tls_get_addr_opt)
9832 p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r,
9833 htab->plt_static_chain);
9834 else
9835 p = build_plt_stub (htab->stub_bfd, loc, off, r,
9836 htab->plt_static_chain);
9837 size = p - loc;
9838 break;
9839
9840 default:
9841 BFD_FAIL ();
9842 return FALSE;
9843 }
9844
9845 stub_entry->stub_sec->size += size;
9846
9847 if (htab->emit_stub_syms)
9848 {
9849 struct elf_link_hash_entry *h;
9850 size_t len1, len2;
9851 char *name;
9852 const char *const stub_str[] = { "long_branch",
9853 "long_branch_r2off",
9854 "plt_branch",
9855 "plt_branch_r2off",
9856 "plt_call" };
9857
9858 len1 = strlen (stub_str[stub_entry->stub_type - 1]);
9859 len2 = strlen (stub_entry->root.string);
9860 name = bfd_malloc (len1 + len2 + 2);
9861 if (name == NULL)
9862 return FALSE;
9863 memcpy (name, stub_entry->root.string, 9);
9864 memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1);
9865 memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1);
9866 h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
9867 if (h == NULL)
9868 return FALSE;
9869 if (h->root.type == bfd_link_hash_new)
9870 {
9871 h->root.type = bfd_link_hash_defined;
9872 h->root.u.def.section = stub_entry->stub_sec;
9873 h->root.u.def.value = stub_entry->stub_offset;
9874 h->ref_regular = 1;
9875 h->def_regular = 1;
9876 h->ref_regular_nonweak = 1;
9877 h->forced_local = 1;
9878 h->non_elf = 0;
9879 }
9880 }
9881
9882 return TRUE;
9883 }
9884
9885 /* As above, but don't actually build the stub. Just bump offset so
9886 we know stub section sizes, and select plt_branch stubs where
9887 long_branch stubs won't do. */
9888
9889 static bfd_boolean
9890 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
9891 {
9892 struct ppc_stub_hash_entry *stub_entry;
9893 struct bfd_link_info *info;
9894 struct ppc_link_hash_table *htab;
9895 bfd_vma off;
9896 int size;
9897
9898 /* Massage our args to the form they really have. */
9899 stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
9900 info = in_arg;
9901
9902 htab = ppc_hash_table (info);
9903 if (htab == NULL)
9904 return FALSE;
9905
9906 if (stub_entry->stub_type == ppc_stub_plt_call)
9907 {
9908 asection *plt;
9909 off = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1;
9910 if (off >= (bfd_vma) -2)
9911 abort ();
9912 plt = htab->plt;
9913 if (!htab->elf.dynamic_sections_created
9914 || stub_entry->h == NULL
9915 || stub_entry->h->elf.dynindx == -1)
9916 plt = htab->iplt;
9917 off += (plt->output_offset
9918 + plt->output_section->vma
9919 - elf_gp (plt->output_section->owner)
9920 - htab->stub_group[stub_entry->id_sec->id].toc_off);
9921
9922 size = PLT_CALL_STUB_SIZE;
9923 if (!htab->plt_static_chain)
9924 size -= 4;
9925 if (PPC_HA (off) == 0)
9926 size -= 4;
9927 if (PPC_HA (off + 8 + 8 * htab->plt_static_chain) != PPC_HA (off))
9928 size += 4;
9929 if (stub_entry->h != NULL
9930 && (stub_entry->h == htab->tls_get_addr_fd
9931 || stub_entry->h == htab->tls_get_addr)
9932 && !htab->no_tls_get_addr_opt)
9933 size += 13 * 4;
9934 if (info->emitrelocations)
9935 {
9936 stub_entry->stub_sec->reloc_count
9937 += (2
9938 + (PPC_HA (off) != 0)
9939 + (htab->plt_static_chain
9940 && PPC_HA (off + 16) == PPC_HA (off)));
9941 stub_entry->stub_sec->flags |= SEC_RELOC;
9942 }
9943 }
9944 else
9945 {
9946 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off
9947 variants. */
9948 bfd_vma r2off = 0;
9949
9950 off = (stub_entry->target_value
9951 + stub_entry->target_section->output_offset
9952 + stub_entry->target_section->output_section->vma);
9953 off -= (stub_entry->stub_sec->size
9954 + stub_entry->stub_sec->output_offset
9955 + stub_entry->stub_sec->output_section->vma);
9956
9957 /* Reset the stub type from the plt variant in case we now
9958 can reach with a shorter stub. */
9959 if (stub_entry->stub_type >= ppc_stub_plt_branch)
9960 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch;
9961
9962 size = 4;
9963 if (stub_entry->stub_type == ppc_stub_long_branch_r2off)
9964 {
9965 r2off = get_r2off (info, stub_entry);
9966 if (r2off == 0)
9967 {
9968 htab->stub_error = TRUE;
9969 return FALSE;
9970 }
9971 size = 12;
9972 if (PPC_HA (r2off) != 0)
9973 size = 16;
9974 off -= size - 4;
9975 }
9976
9977 /* If the branch offset if too big, use a ppc_stub_plt_branch. */
9978 if (off + (1 << 25) >= (bfd_vma) (1 << 26))
9979 {
9980 struct ppc_branch_hash_entry *br_entry;
9981
9982 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
9983 stub_entry->root.string + 9,
9984 TRUE, FALSE);
9985 if (br_entry == NULL)
9986 {
9987 info->callbacks->einfo (_("can't build branch stub `%s'\n"),
9988 stub_entry->root.string);
9989 htab->stub_error = TRUE;
9990 return FALSE;
9991 }
9992
9993 if (br_entry->iter != htab->stub_iteration)
9994 {
9995 br_entry->iter = htab->stub_iteration;
9996 br_entry->offset = htab->brlt->size;
9997 htab->brlt->size += 8;
9998
9999 if (htab->relbrlt != NULL)
10000 htab->relbrlt->size += sizeof (Elf64_External_Rela);
10001 else if (info->emitrelocations)
10002 {
10003 htab->brlt->reloc_count += 1;
10004 htab->brlt->flags |= SEC_RELOC;
10005 }
10006 }
10007
10008 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch;
10009 off = (br_entry->offset
10010 + htab->brlt->output_offset
10011 + htab->brlt->output_section->vma
10012 - elf_gp (htab->brlt->output_section->owner)
10013 - htab->stub_group[stub_entry->id_sec->id].toc_off);
10014
10015 if (info->emitrelocations)
10016 {
10017 stub_entry->stub_sec->reloc_count += 1 + (PPC_HA (off) != 0);
10018 stub_entry->stub_sec->flags |= SEC_RELOC;
10019 }
10020
10021 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off)
10022 {
10023 size = 12;
10024 if (PPC_HA (off) != 0)
10025 size = 16;
10026 }
10027 else
10028 {
10029 size = 20;
10030 if (PPC_HA (off) != 0)
10031 size += 4;
10032
10033 if (PPC_HA (r2off) != 0)
10034 size += 4;
10035 }
10036 }
10037 else if (info->emitrelocations)
10038 {
10039 stub_entry->stub_sec->reloc_count += 1;
10040 stub_entry->stub_sec->flags |= SEC_RELOC;
10041 }
10042 }
10043
10044 stub_entry->stub_sec->size += size;
10045 return TRUE;
10046 }
10047
10048 /* Set up various things so that we can make a list of input sections
10049 for each output section included in the link. Returns -1 on error,
10050 0 when no stubs will be needed, and 1 on success. */
10051
10052 int
10053 ppc64_elf_setup_section_lists
10054 (struct bfd_link_info *info,
10055 asection *(*add_stub_section) (const char *, asection *),
10056 void (*layout_sections_again) (void))
10057 {
10058 bfd *input_bfd;
10059 int top_id, top_index, id;
10060 asection *section;
10061 asection **input_list;
10062 bfd_size_type amt;
10063 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10064
10065 if (htab == NULL)
10066 return -1;
10067 /* Stash our params away. */
10068 htab->add_stub_section = add_stub_section;
10069 htab->layout_sections_again = layout_sections_again;
10070
10071 if (htab->brlt == NULL)
10072 return 0;
10073
10074 /* Find the top input section id. */
10075 for (input_bfd = info->input_bfds, top_id = 3;
10076 input_bfd != NULL;
10077 input_bfd = input_bfd->link_next)
10078 {
10079 for (section = input_bfd->sections;
10080 section != NULL;
10081 section = section->next)
10082 {
10083 if (top_id < section->id)
10084 top_id = section->id;
10085 }
10086 }
10087
10088 htab->top_id = top_id;
10089 amt = sizeof (struct map_stub) * (top_id + 1);
10090 htab->stub_group = bfd_zmalloc (amt);
10091 if (htab->stub_group == NULL)
10092 return -1;
10093
10094 /* Set toc_off for com, und, abs and ind sections. */
10095 for (id = 0; id < 3; id++)
10096 htab->stub_group[id].toc_off = TOC_BASE_OFF;
10097
10098 /* We can't use output_bfd->section_count here to find the top output
10099 section index as some sections may have been removed, and
10100 strip_excluded_output_sections doesn't renumber the indices. */
10101 for (section = info->output_bfd->sections, top_index = 0;
10102 section != NULL;
10103 section = section->next)
10104 {
10105 if (top_index < section->index)
10106 top_index = section->index;
10107 }
10108
10109 htab->top_index = top_index;
10110 amt = sizeof (asection *) * (top_index + 1);
10111 input_list = bfd_zmalloc (amt);
10112 htab->input_list = input_list;
10113 if (input_list == NULL)
10114 return -1;
10115
10116 return 1;
10117 }
10118
10119 /* Set up for first pass at multitoc partitioning. */
10120
10121 void
10122 ppc64_elf_start_multitoc_partition (struct bfd_link_info *info)
10123 {
10124 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10125
10126 elf_gp (info->output_bfd) = ppc64_elf_toc (info->output_bfd);
10127 htab->toc_curr = elf_gp (info->output_bfd);
10128 htab->toc_bfd = NULL;
10129 htab->toc_first_sec = NULL;
10130 }
10131
10132 /* The linker repeatedly calls this function for each TOC input section
10133 and linker generated GOT section. Group input bfds such that the toc
10134 within a group is less than 64k in size. */
10135
10136 bfd_boolean
10137 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec)
10138 {
10139 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10140 bfd_vma addr, off, limit;
10141
10142 if (htab == NULL)
10143 return FALSE;
10144
10145 if (!htab->second_toc_pass)
10146 {
10147 /* Keep track of the first .toc or .got section for this input bfd. */
10148 if (htab->toc_bfd != isec->owner)
10149 {
10150 htab->toc_bfd = isec->owner;
10151 htab->toc_first_sec = isec;
10152 }
10153
10154 addr = isec->output_offset + isec->output_section->vma;
10155 off = addr - htab->toc_curr;
10156 limit = 0x80008000;
10157 if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc)
10158 limit = 0x10000;
10159 if (off + isec->size > limit)
10160 {
10161 addr = (htab->toc_first_sec->output_offset
10162 + htab->toc_first_sec->output_section->vma);
10163 htab->toc_curr = addr;
10164 }
10165
10166 /* toc_curr is the base address of this toc group. Set elf_gp
10167 for the input section to be the offset relative to the
10168 output toc base plus 0x8000. Making the input elf_gp an
10169 offset allows us to move the toc as a whole without
10170 recalculating input elf_gp. */
10171 off = htab->toc_curr - elf_gp (isec->output_section->owner);
10172 off += TOC_BASE_OFF;
10173
10174 /* Die if someone uses a linker script that doesn't keep input
10175 file .toc and .got together. */
10176 if (elf_gp (isec->owner) != 0
10177 && elf_gp (isec->owner) != off)
10178 return FALSE;
10179
10180 elf_gp (isec->owner) = off;
10181 return TRUE;
10182 }
10183
10184 /* During the second pass toc_first_sec points to the start of
10185 a toc group, and toc_curr is used to track the old elf_gp.
10186 We use toc_bfd to ensure we only look at each bfd once. */
10187 if (htab->toc_bfd == isec->owner)
10188 return TRUE;
10189 htab->toc_bfd = isec->owner;
10190
10191 if (htab->toc_first_sec == NULL
10192 || htab->toc_curr != elf_gp (isec->owner))
10193 {
10194 htab->toc_curr = elf_gp (isec->owner);
10195 htab->toc_first_sec = isec;
10196 }
10197 addr = (htab->toc_first_sec->output_offset
10198 + htab->toc_first_sec->output_section->vma);
10199 off = addr - elf_gp (isec->output_section->owner) + TOC_BASE_OFF;
10200 elf_gp (isec->owner) = off;
10201
10202 return TRUE;
10203 }
10204
10205 /* Called via elf_link_hash_traverse to merge GOT entries for global
10206 symbol H. */
10207
10208 static bfd_boolean
10209 merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
10210 {
10211 if (h->root.type == bfd_link_hash_indirect)
10212 return TRUE;
10213
10214 merge_got_entries (&h->got.glist);
10215
10216 return TRUE;
10217 }
10218
10219 /* Called via elf_link_hash_traverse to allocate GOT entries for global
10220 symbol H. */
10221
10222 static bfd_boolean
10223 reallocate_got (struct elf_link_hash_entry *h, void *inf)
10224 {
10225 struct got_entry *gent;
10226
10227 if (h->root.type == bfd_link_hash_indirect)
10228 return TRUE;
10229
10230 for (gent = h->got.glist; gent != NULL; gent = gent->next)
10231 if (!gent->is_indirect)
10232 allocate_got (h, (struct bfd_link_info *) inf, gent);
10233 return TRUE;
10234 }
10235
10236 /* Called on the first multitoc pass after the last call to
10237 ppc64_elf_next_toc_section. This function removes duplicate GOT
10238 entries. */
10239
10240 bfd_boolean
10241 ppc64_elf_layout_multitoc (struct bfd_link_info *info)
10242 {
10243 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10244 struct bfd *ibfd, *ibfd2;
10245 bfd_boolean done_something;
10246
10247 htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd);
10248
10249 if (!htab->do_multi_toc)
10250 return FALSE;
10251
10252 /* Merge global sym got entries within a toc group. */
10253 elf_link_hash_traverse (&htab->elf, merge_global_got, info);
10254
10255 /* And tlsld_got. */
10256 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10257 {
10258 struct got_entry *ent, *ent2;
10259
10260 if (!is_ppc64_elf (ibfd))
10261 continue;
10262
10263 ent = ppc64_tlsld_got (ibfd);
10264 if (!ent->is_indirect
10265 && ent->got.offset != (bfd_vma) -1)
10266 {
10267 for (ibfd2 = ibfd->link_next; ibfd2 != NULL; ibfd2 = ibfd2->link_next)
10268 {
10269 if (!is_ppc64_elf (ibfd2))
10270 continue;
10271
10272 ent2 = ppc64_tlsld_got (ibfd2);
10273 if (!ent2->is_indirect
10274 && ent2->got.offset != (bfd_vma) -1
10275 && elf_gp (ibfd2) == elf_gp (ibfd))
10276 {
10277 ent2->is_indirect = TRUE;
10278 ent2->got.ent = ent;
10279 }
10280 }
10281 }
10282 }
10283
10284 /* Zap sizes of got sections. */
10285 htab->reliplt->rawsize = htab->reliplt->size;
10286 htab->reliplt->size -= htab->got_reli_size;
10287 htab->got_reli_size = 0;
10288
10289 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10290 {
10291 asection *got, *relgot;
10292
10293 if (!is_ppc64_elf (ibfd))
10294 continue;
10295
10296 got = ppc64_elf_tdata (ibfd)->got;
10297 if (got != NULL)
10298 {
10299 got->rawsize = got->size;
10300 got->size = 0;
10301 relgot = ppc64_elf_tdata (ibfd)->relgot;
10302 relgot->rawsize = relgot->size;
10303 relgot->size = 0;
10304 }
10305 }
10306
10307 /* Now reallocate the got, local syms first. We don't need to
10308 allocate section contents again since we never increase size. */
10309 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10310 {
10311 struct got_entry **lgot_ents;
10312 struct got_entry **end_lgot_ents;
10313 struct plt_entry **local_plt;
10314 struct plt_entry **end_local_plt;
10315 unsigned char *lgot_masks;
10316 bfd_size_type locsymcount;
10317 Elf_Internal_Shdr *symtab_hdr;
10318 asection *s, *srel;
10319
10320 if (!is_ppc64_elf (ibfd))
10321 continue;
10322
10323 lgot_ents = elf_local_got_ents (ibfd);
10324 if (!lgot_ents)
10325 continue;
10326
10327 symtab_hdr = &elf_symtab_hdr (ibfd);
10328 locsymcount = symtab_hdr->sh_info;
10329 end_lgot_ents = lgot_ents + locsymcount;
10330 local_plt = (struct plt_entry **) end_lgot_ents;
10331 end_local_plt = local_plt + locsymcount;
10332 lgot_masks = (unsigned char *) end_local_plt;
10333 s = ppc64_elf_tdata (ibfd)->got;
10334 srel = ppc64_elf_tdata (ibfd)->relgot;
10335 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks)
10336 {
10337 struct got_entry *ent;
10338
10339 for (ent = *lgot_ents; ent != NULL; ent = ent->next)
10340 {
10341 unsigned int num = 1;
10342 ent->got.offset = s->size;
10343 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0)
10344 num = 2;
10345 s->size += num * 8;
10346 if (info->shared)
10347 srel->size += num * sizeof (Elf64_External_Rela);
10348 else if ((*lgot_masks & PLT_IFUNC) != 0)
10349 {
10350 htab->reliplt->size
10351 += num * sizeof (Elf64_External_Rela);
10352 htab->got_reli_size
10353 += num * sizeof (Elf64_External_Rela);
10354 }
10355 }
10356 }
10357 }
10358
10359 elf_link_hash_traverse (&htab->elf, reallocate_got, info);
10360
10361 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10362 {
10363 struct got_entry *ent;
10364
10365 if (!is_ppc64_elf (ibfd))
10366 continue;
10367
10368 ent = ppc64_tlsld_got (ibfd);
10369 if (!ent->is_indirect
10370 && ent->got.offset != (bfd_vma) -1)
10371 {
10372 asection *s = ppc64_elf_tdata (ibfd)->got;
10373 ent->got.offset = s->size;
10374 s->size += 16;
10375 if (info->shared)
10376 {
10377 asection *srel = ppc64_elf_tdata (ibfd)->relgot;
10378 srel->size += sizeof (Elf64_External_Rela);
10379 }
10380 }
10381 }
10382
10383 done_something = htab->reliplt->rawsize != htab->reliplt->size;
10384 if (!done_something)
10385 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
10386 {
10387 asection *got;
10388
10389 if (!is_ppc64_elf (ibfd))
10390 continue;
10391
10392 got = ppc64_elf_tdata (ibfd)->got;
10393 if (got != NULL)
10394 {
10395 done_something = got->rawsize != got->size;
10396 if (done_something)
10397 break;
10398 }
10399 }
10400
10401 if (done_something)
10402 (*htab->layout_sections_again) ();
10403
10404 /* Set up for second pass over toc sections to recalculate elf_gp
10405 on input sections. */
10406 htab->toc_bfd = NULL;
10407 htab->toc_first_sec = NULL;
10408 htab->second_toc_pass = TRUE;
10409 return done_something;
10410 }
10411
10412 /* Called after second pass of multitoc partitioning. */
10413
10414 void
10415 ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info)
10416 {
10417 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10418
10419 /* After the second pass, toc_curr tracks the TOC offset used
10420 for code sections below in ppc64_elf_next_input_section. */
10421 htab->toc_curr = TOC_BASE_OFF;
10422 }
10423
10424 /* No toc references were found in ISEC. If the code in ISEC makes no
10425 calls, then there's no need to use toc adjusting stubs when branching
10426 into ISEC. Actually, indirect calls from ISEC are OK as they will
10427 load r2. Returns -1 on error, 0 for no stub needed, 1 for stub
10428 needed, and 2 if a cyclical call-graph was found but no other reason
10429 for a stub was detected. If called from the top level, a return of
10430 2 means the same as a return of 0. */
10431
10432 static int
10433 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec)
10434 {
10435 int ret;
10436
10437 /* Mark this section as checked. */
10438 isec->call_check_done = 1;
10439
10440 /* We know none of our code bearing sections will need toc stubs. */
10441 if ((isec->flags & SEC_LINKER_CREATED) != 0)
10442 return 0;
10443
10444 if (isec->size == 0)
10445 return 0;
10446
10447 if (isec->output_section == NULL)
10448 return 0;
10449
10450 ret = 0;
10451 if (isec->reloc_count != 0)
10452 {
10453 Elf_Internal_Rela *relstart, *rel;
10454 Elf_Internal_Sym *local_syms;
10455 struct ppc_link_hash_table *htab;
10456
10457 relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL,
10458 info->keep_memory);
10459 if (relstart == NULL)
10460 return -1;
10461
10462 /* Look for branches to outside of this section. */
10463 local_syms = NULL;
10464 htab = ppc_hash_table (info);
10465 if (htab == NULL)
10466 return -1;
10467
10468 for (rel = relstart; rel < relstart + isec->reloc_count; ++rel)
10469 {
10470 enum elf_ppc64_reloc_type r_type;
10471 unsigned long r_symndx;
10472 struct elf_link_hash_entry *h;
10473 struct ppc_link_hash_entry *eh;
10474 Elf_Internal_Sym *sym;
10475 asection *sym_sec;
10476 struct _opd_sec_data *opd;
10477 bfd_vma sym_value;
10478 bfd_vma dest;
10479
10480 r_type = ELF64_R_TYPE (rel->r_info);
10481 if (r_type != R_PPC64_REL24
10482 && r_type != R_PPC64_REL14
10483 && r_type != R_PPC64_REL14_BRTAKEN
10484 && r_type != R_PPC64_REL14_BRNTAKEN)
10485 continue;
10486
10487 r_symndx = ELF64_R_SYM (rel->r_info);
10488 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx,
10489 isec->owner))
10490 {
10491 ret = -1;
10492 break;
10493 }
10494
10495 /* Calls to dynamic lib functions go through a plt call stub
10496 that uses r2. */
10497 eh = (struct ppc_link_hash_entry *) h;
10498 if (eh != NULL
10499 && (eh->elf.plt.plist != NULL
10500 || (eh->oh != NULL
10501 && ppc_follow_link (eh->oh)->elf.plt.plist != NULL)))
10502 {
10503 ret = 1;
10504 break;
10505 }
10506
10507 if (sym_sec == NULL)
10508 /* Ignore other undefined symbols. */
10509 continue;
10510
10511 /* Assume branches to other sections not included in the
10512 link need stubs too, to cover -R and absolute syms. */
10513 if (sym_sec->output_section == NULL)
10514 {
10515 ret = 1;
10516 break;
10517 }
10518
10519 if (h == NULL)
10520 sym_value = sym->st_value;
10521 else
10522 {
10523 if (h->root.type != bfd_link_hash_defined
10524 && h->root.type != bfd_link_hash_defweak)
10525 abort ();
10526 sym_value = h->root.u.def.value;
10527 }
10528 sym_value += rel->r_addend;
10529
10530 /* If this branch reloc uses an opd sym, find the code section. */
10531 opd = get_opd_info (sym_sec);
10532 if (opd != NULL)
10533 {
10534 if (h == NULL && opd->adjust != NULL)
10535 {
10536 long adjust;
10537
10538 adjust = opd->adjust[sym->st_value / 8];
10539 if (adjust == -1)
10540 /* Assume deleted functions won't ever be called. */
10541 continue;
10542 sym_value += adjust;
10543 }
10544
10545 dest = opd_entry_value (sym_sec, sym_value, &sym_sec, NULL);
10546 if (dest == (bfd_vma) -1)
10547 continue;
10548 }
10549 else
10550 dest = (sym_value
10551 + sym_sec->output_offset
10552 + sym_sec->output_section->vma);
10553
10554 /* Ignore branch to self. */
10555 if (sym_sec == isec)
10556 continue;
10557
10558 /* If the called function uses the toc, we need a stub. */
10559 if (sym_sec->has_toc_reloc
10560 || sym_sec->makes_toc_func_call)
10561 {
10562 ret = 1;
10563 break;
10564 }
10565
10566 /* Assume any branch that needs a long branch stub might in fact
10567 need a plt_branch stub. A plt_branch stub uses r2. */
10568 else if (dest - (isec->output_offset
10569 + isec->output_section->vma
10570 + rel->r_offset) + (1 << 25) >= (2 << 25))
10571 {
10572 ret = 1;
10573 break;
10574 }
10575
10576 /* If calling back to a section in the process of being
10577 tested, we can't say for sure that no toc adjusting stubs
10578 are needed, so don't return zero. */
10579 else if (sym_sec->call_check_in_progress)
10580 ret = 2;
10581
10582 /* Branches to another section that itself doesn't have any TOC
10583 references are OK. Recursively call ourselves to check. */
10584 else if (!sym_sec->call_check_done)
10585 {
10586 int recur;
10587
10588 /* Mark current section as indeterminate, so that other
10589 sections that call back to current won't be marked as
10590 known. */
10591 isec->call_check_in_progress = 1;
10592 recur = toc_adjusting_stub_needed (info, sym_sec);
10593 isec->call_check_in_progress = 0;
10594
10595 if (recur != 0)
10596 {
10597 ret = recur;
10598 if (recur != 2)
10599 break;
10600 }
10601 }
10602 }
10603
10604 if (local_syms != NULL
10605 && (elf_symtab_hdr (isec->owner).contents
10606 != (unsigned char *) local_syms))
10607 free (local_syms);
10608 if (elf_section_data (isec)->relocs != relstart)
10609 free (relstart);
10610 }
10611
10612 if ((ret & 1) == 0
10613 && isec->map_head.s != NULL
10614 && (strcmp (isec->output_section->name, ".init") == 0
10615 || strcmp (isec->output_section->name, ".fini") == 0))
10616 {
10617 if (isec->map_head.s->has_toc_reloc
10618 || isec->map_head.s->makes_toc_func_call)
10619 ret = 1;
10620 else if (!isec->map_head.s->call_check_done)
10621 {
10622 int recur;
10623 isec->call_check_in_progress = 1;
10624 recur = toc_adjusting_stub_needed (info, isec->map_head.s);
10625 isec->call_check_in_progress = 0;
10626 if (recur != 0)
10627 ret = recur;
10628 }
10629 }
10630
10631 if (ret == 1)
10632 isec->makes_toc_func_call = 1;
10633
10634 return ret;
10635 }
10636
10637 /* The linker repeatedly calls this function for each input section,
10638 in the order that input sections are linked into output sections.
10639 Build lists of input sections to determine groupings between which
10640 we may insert linker stubs. */
10641
10642 bfd_boolean
10643 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec)
10644 {
10645 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10646
10647 if (htab == NULL)
10648 return FALSE;
10649
10650 if ((isec->output_section->flags & SEC_CODE) != 0
10651 && isec->output_section->index <= htab->top_index)
10652 {
10653 asection **list = htab->input_list + isec->output_section->index;
10654 /* Steal the link_sec pointer for our list. */
10655 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
10656 /* This happens to make the list in reverse order,
10657 which is what we want. */
10658 PREV_SEC (isec) = *list;
10659 *list = isec;
10660 }
10661
10662 if (htab->multi_toc_needed)
10663 {
10664 /* If a code section has a function that uses the TOC then we need
10665 to use the right TOC (obviously). Also, make sure that .opd gets
10666 the correct TOC value for R_PPC64_TOC relocs that don't have or
10667 can't find their function symbol (shouldn't ever happen now).
10668 Also specially treat .fixup for the linux kernel. .fixup
10669 contains branches, but only back to the function that hit an
10670 exception. */
10671 if (isec->has_toc_reloc
10672 || (isec->flags & SEC_CODE) == 0
10673 || strcmp (isec->name, ".fixup") == 0)
10674 {
10675 if (elf_gp (isec->owner) != 0)
10676 htab->toc_curr = elf_gp (isec->owner);
10677 }
10678 else
10679 {
10680 if (!isec->call_check_done
10681 && toc_adjusting_stub_needed (info, isec) < 0)
10682 return FALSE;
10683 /* If we make a local call from this section, ie. a branch
10684 without a following nop, then we have no place to put a
10685 toc restoring insn. We must use the same toc group as
10686 the callee.
10687 Testing makes_toc_func_call actually tests for *any*
10688 calls to functions that need a good toc pointer. A more
10689 precise test would be better, as this one will set
10690 incorrect values for pasted .init/.fini fragments.
10691 (Fixed later in check_pasted_section.) */
10692 if (isec->makes_toc_func_call
10693 && elf_gp (isec->owner) != 0)
10694 htab->toc_curr = elf_gp (isec->owner);
10695 }
10696 }
10697
10698 /* Functions that don't use the TOC can belong in any TOC group.
10699 Use the last TOC base. */
10700 htab->stub_group[isec->id].toc_off = htab->toc_curr;
10701 return TRUE;
10702 }
10703
10704 /* Check that all .init and .fini sections use the same toc, if they
10705 have toc relocs. */
10706
10707 static bfd_boolean
10708 check_pasted_section (struct bfd_link_info *info, const char *name)
10709 {
10710 asection *o = bfd_get_section_by_name (info->output_bfd, name);
10711
10712 if (o != NULL)
10713 {
10714 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10715 bfd_vma toc_off = 0;
10716 asection *i;
10717
10718 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10719 if (i->has_toc_reloc)
10720 {
10721 if (toc_off == 0)
10722 toc_off = htab->stub_group[i->id].toc_off;
10723 else if (toc_off != htab->stub_group[i->id].toc_off)
10724 return FALSE;
10725 }
10726
10727 if (toc_off == 0)
10728 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10729 if (i->makes_toc_func_call)
10730 {
10731 toc_off = htab->stub_group[i->id].toc_off;
10732 break;
10733 }
10734
10735 /* Make sure the whole pasted function uses the same toc offset. */
10736 if (toc_off != 0)
10737 for (i = o->map_head.s; i != NULL; i = i->map_head.s)
10738 htab->stub_group[i->id].toc_off = toc_off;
10739 }
10740 return TRUE;
10741 }
10742
10743 bfd_boolean
10744 ppc64_elf_check_init_fini (struct bfd_link_info *info)
10745 {
10746 return (check_pasted_section (info, ".init")
10747 & check_pasted_section (info, ".fini"));
10748 }
10749
10750 /* See whether we can group stub sections together. Grouping stub
10751 sections may result in fewer stubs. More importantly, we need to
10752 put all .init* and .fini* stubs at the beginning of the .init or
10753 .fini output sections respectively, because glibc splits the
10754 _init and _fini functions into multiple parts. Putting a stub in
10755 the middle of a function is not a good idea. */
10756
10757 static void
10758 group_sections (struct ppc_link_hash_table *htab,
10759 bfd_size_type stub_group_size,
10760 bfd_boolean stubs_always_before_branch)
10761 {
10762 asection **list;
10763 bfd_size_type stub14_group_size;
10764 bfd_boolean suppress_size_errors;
10765
10766 suppress_size_errors = FALSE;
10767 stub14_group_size = stub_group_size;
10768 if (stub_group_size == 1)
10769 {
10770 /* Default values. */
10771 if (stubs_always_before_branch)
10772 {
10773 stub_group_size = 0x1e00000;
10774 stub14_group_size = 0x7800;
10775 }
10776 else
10777 {
10778 stub_group_size = 0x1c00000;
10779 stub14_group_size = 0x7000;
10780 }
10781 suppress_size_errors = TRUE;
10782 }
10783
10784 list = htab->input_list + htab->top_index;
10785 do
10786 {
10787 asection *tail = *list;
10788 while (tail != NULL)
10789 {
10790 asection *curr;
10791 asection *prev;
10792 bfd_size_type total;
10793 bfd_boolean big_sec;
10794 bfd_vma curr_toc;
10795
10796 curr = tail;
10797 total = tail->size;
10798 big_sec = total > (ppc64_elf_section_data (tail) != NULL
10799 && ppc64_elf_section_data (tail)->has_14bit_branch
10800 ? stub14_group_size : stub_group_size);
10801 if (big_sec && !suppress_size_errors)
10802 (*_bfd_error_handler) (_("%B section %A exceeds stub group size"),
10803 tail->owner, tail);
10804 curr_toc = htab->stub_group[tail->id].toc_off;
10805
10806 while ((prev = PREV_SEC (curr)) != NULL
10807 && ((total += curr->output_offset - prev->output_offset)
10808 < (ppc64_elf_section_data (prev) != NULL
10809 && ppc64_elf_section_data (prev)->has_14bit_branch
10810 ? stub14_group_size : stub_group_size))
10811 && htab->stub_group[prev->id].toc_off == curr_toc)
10812 curr = prev;
10813
10814 /* OK, the size from the start of CURR to the end is less
10815 than stub_group_size and thus can be handled by one stub
10816 section. (or the tail section is itself larger than
10817 stub_group_size, in which case we may be toast.) We
10818 should really be keeping track of the total size of stubs
10819 added here, as stubs contribute to the final output
10820 section size. That's a little tricky, and this way will
10821 only break if stubs added make the total size more than
10822 2^25, ie. for the default stub_group_size, if stubs total
10823 more than 2097152 bytes, or nearly 75000 plt call stubs. */
10824 do
10825 {
10826 prev = PREV_SEC (tail);
10827 /* Set up this stub group. */
10828 htab->stub_group[tail->id].link_sec = curr;
10829 }
10830 while (tail != curr && (tail = prev) != NULL);
10831
10832 /* But wait, there's more! Input sections up to stub_group_size
10833 bytes before the stub section can be handled by it too.
10834 Don't do this if we have a really large section after the
10835 stubs, as adding more stubs increases the chance that
10836 branches may not reach into the stub section. */
10837 if (!stubs_always_before_branch && !big_sec)
10838 {
10839 total = 0;
10840 while (prev != NULL
10841 && ((total += tail->output_offset - prev->output_offset)
10842 < (ppc64_elf_section_data (prev) != NULL
10843 && ppc64_elf_section_data (prev)->has_14bit_branch
10844 ? stub14_group_size : stub_group_size))
10845 && htab->stub_group[prev->id].toc_off == curr_toc)
10846 {
10847 tail = prev;
10848 prev = PREV_SEC (tail);
10849 htab->stub_group[tail->id].link_sec = curr;
10850 }
10851 }
10852 tail = prev;
10853 }
10854 }
10855 while (list-- != htab->input_list);
10856 free (htab->input_list);
10857 #undef PREV_SEC
10858 }
10859
10860 static const unsigned char glink_eh_frame_cie[] =
10861 {
10862 0, 0, 0, 16, /* length. */
10863 0, 0, 0, 0, /* id. */
10864 1, /* CIE version. */
10865 'z', 'R', 0, /* Augmentation string. */
10866 4, /* Code alignment. */
10867 0x78, /* Data alignment. */
10868 65, /* RA reg. */
10869 1, /* Augmentation size. */
10870 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
10871 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
10872 };
10873
10874 /* Stripping output sections is normally done before dynamic section
10875 symbols have been allocated. This function is called later, and
10876 handles cases like htab->brlt which is mapped to its own output
10877 section. */
10878
10879 static void
10880 maybe_strip_output (struct bfd_link_info *info, asection *isec)
10881 {
10882 if (isec->size == 0
10883 && isec->output_section->size == 0
10884 && !bfd_section_removed_from_list (info->output_bfd,
10885 isec->output_section)
10886 && elf_section_data (isec->output_section)->dynindx == 0)
10887 {
10888 isec->output_section->flags |= SEC_EXCLUDE;
10889 bfd_section_list_remove (info->output_bfd, isec->output_section);
10890 info->output_bfd->section_count--;
10891 }
10892 }
10893
10894 /* Determine and set the size of the stub section for a final link.
10895
10896 The basic idea here is to examine all the relocations looking for
10897 PC-relative calls to a target that is unreachable with a "bl"
10898 instruction. */
10899
10900 bfd_boolean
10901 ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
10902 bfd_boolean plt_static_chain)
10903 {
10904 bfd_size_type stub_group_size;
10905 bfd_boolean stubs_always_before_branch;
10906 struct ppc_link_hash_table *htab = ppc_hash_table (info);
10907
10908 if (htab == NULL)
10909 return FALSE;
10910
10911 htab->plt_static_chain = plt_static_chain;
10912 stubs_always_before_branch = group_size < 0;
10913 if (group_size < 0)
10914 stub_group_size = -group_size;
10915 else
10916 stub_group_size = group_size;
10917
10918 group_sections (htab, stub_group_size, stubs_always_before_branch);
10919
10920 while (1)
10921 {
10922 bfd *input_bfd;
10923 unsigned int bfd_indx;
10924 asection *stub_sec;
10925
10926 htab->stub_iteration += 1;
10927
10928 for (input_bfd = info->input_bfds, bfd_indx = 0;
10929 input_bfd != NULL;
10930 input_bfd = input_bfd->link_next, bfd_indx++)
10931 {
10932 Elf_Internal_Shdr *symtab_hdr;
10933 asection *section;
10934 Elf_Internal_Sym *local_syms = NULL;
10935
10936 if (!is_ppc64_elf (input_bfd))
10937 continue;
10938
10939 /* We'll need the symbol table in a second. */
10940 symtab_hdr = &elf_symtab_hdr (input_bfd);
10941 if (symtab_hdr->sh_info == 0)
10942 continue;
10943
10944 /* Walk over each section attached to the input bfd. */
10945 for (section = input_bfd->sections;
10946 section != NULL;
10947 section = section->next)
10948 {
10949 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
10950
10951 /* If there aren't any relocs, then there's nothing more
10952 to do. */
10953 if ((section->flags & SEC_RELOC) == 0
10954 || (section->flags & SEC_ALLOC) == 0
10955 || (section->flags & SEC_LOAD) == 0
10956 || (section->flags & SEC_CODE) == 0
10957 || section->reloc_count == 0)
10958 continue;
10959
10960 /* If this section is a link-once section that will be
10961 discarded, then don't create any stubs. */
10962 if (section->output_section == NULL
10963 || section->output_section->owner != info->output_bfd)
10964 continue;
10965
10966 /* Get the relocs. */
10967 internal_relocs
10968 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
10969 info->keep_memory);
10970 if (internal_relocs == NULL)
10971 goto error_ret_free_local;
10972
10973 /* Now examine each relocation. */
10974 irela = internal_relocs;
10975 irelaend = irela + section->reloc_count;
10976 for (; irela < irelaend; irela++)
10977 {
10978 enum elf_ppc64_reloc_type r_type;
10979 unsigned int r_indx;
10980 enum ppc_stub_type stub_type;
10981 struct ppc_stub_hash_entry *stub_entry;
10982 asection *sym_sec, *code_sec;
10983 bfd_vma sym_value, code_value;
10984 bfd_vma destination;
10985 bfd_boolean ok_dest;
10986 struct ppc_link_hash_entry *hash;
10987 struct ppc_link_hash_entry *fdh;
10988 struct elf_link_hash_entry *h;
10989 Elf_Internal_Sym *sym;
10990 char *stub_name;
10991 const asection *id_sec;
10992 struct _opd_sec_data *opd;
10993 struct plt_entry *plt_ent;
10994
10995 r_type = ELF64_R_TYPE (irela->r_info);
10996 r_indx = ELF64_R_SYM (irela->r_info);
10997
10998 if (r_type >= R_PPC64_max)
10999 {
11000 bfd_set_error (bfd_error_bad_value);
11001 goto error_ret_free_internal;
11002 }
11003
11004 /* Only look for stubs on branch instructions. */
11005 if (r_type != R_PPC64_REL24
11006 && r_type != R_PPC64_REL14
11007 && r_type != R_PPC64_REL14_BRTAKEN
11008 && r_type != R_PPC64_REL14_BRNTAKEN)
11009 continue;
11010
11011 /* Now determine the call target, its name, value,
11012 section. */
11013 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms,
11014 r_indx, input_bfd))
11015 goto error_ret_free_internal;
11016 hash = (struct ppc_link_hash_entry *) h;
11017
11018 ok_dest = FALSE;
11019 fdh = NULL;
11020 sym_value = 0;
11021 if (hash == NULL)
11022 {
11023 sym_value = sym->st_value;
11024 ok_dest = TRUE;
11025 }
11026 else if (hash->elf.root.type == bfd_link_hash_defined
11027 || hash->elf.root.type == bfd_link_hash_defweak)
11028 {
11029 sym_value = hash->elf.root.u.def.value;
11030 if (sym_sec->output_section != NULL)
11031 ok_dest = TRUE;
11032 }
11033 else if (hash->elf.root.type == bfd_link_hash_undefweak
11034 || hash->elf.root.type == bfd_link_hash_undefined)
11035 {
11036 /* Recognise an old ABI func code entry sym, and
11037 use the func descriptor sym instead if it is
11038 defined. */
11039 if (hash->elf.root.root.string[0] == '.'
11040 && (fdh = lookup_fdh (hash, htab)) != NULL)
11041 {
11042 if (fdh->elf.root.type == bfd_link_hash_defined
11043 || fdh->elf.root.type == bfd_link_hash_defweak)
11044 {
11045 sym_sec = fdh->elf.root.u.def.section;
11046 sym_value = fdh->elf.root.u.def.value;
11047 if (sym_sec->output_section != NULL)
11048 ok_dest = TRUE;
11049 }
11050 else
11051 fdh = NULL;
11052 }
11053 }
11054 else
11055 {
11056 bfd_set_error (bfd_error_bad_value);
11057 goto error_ret_free_internal;
11058 }
11059
11060 destination = 0;
11061 if (ok_dest)
11062 {
11063 sym_value += irela->r_addend;
11064 destination = (sym_value
11065 + sym_sec->output_offset
11066 + sym_sec->output_section->vma);
11067 }
11068
11069 code_sec = sym_sec;
11070 code_value = sym_value;
11071 opd = get_opd_info (sym_sec);
11072 if (opd != NULL)
11073 {
11074 bfd_vma dest;
11075
11076 if (hash == NULL && opd->adjust != NULL)
11077 {
11078 long adjust = opd->adjust[sym_value / 8];
11079 if (adjust == -1)
11080 continue;
11081 code_value += adjust;
11082 sym_value += adjust;
11083 }
11084 dest = opd_entry_value (sym_sec, sym_value,
11085 &code_sec, &code_value);
11086 if (dest != (bfd_vma) -1)
11087 {
11088 destination = dest;
11089 if (fdh != NULL)
11090 {
11091 /* Fixup old ABI sym to point at code
11092 entry. */
11093 hash->elf.root.type = bfd_link_hash_defweak;
11094 hash->elf.root.u.def.section = code_sec;
11095 hash->elf.root.u.def.value = code_value;
11096 }
11097 }
11098 }
11099
11100 /* Determine what (if any) linker stub is needed. */
11101 plt_ent = NULL;
11102 stub_type = ppc_type_of_stub (section, irela, &hash,
11103 &plt_ent, destination);
11104
11105 if (stub_type != ppc_stub_plt_call)
11106 {
11107 /* Check whether we need a TOC adjusting stub.
11108 Since the linker pastes together pieces from
11109 different object files when creating the
11110 _init and _fini functions, it may be that a
11111 call to what looks like a local sym is in
11112 fact a call needing a TOC adjustment. */
11113 if (code_sec != NULL
11114 && code_sec->output_section != NULL
11115 && (htab->stub_group[code_sec->id].toc_off
11116 != htab->stub_group[section->id].toc_off)
11117 && (code_sec->has_toc_reloc
11118 || code_sec->makes_toc_func_call))
11119 stub_type = ppc_stub_long_branch_r2off;
11120 }
11121
11122 if (stub_type == ppc_stub_none)
11123 continue;
11124
11125 /* __tls_get_addr calls might be eliminated. */
11126 if (stub_type != ppc_stub_plt_call
11127 && hash != NULL
11128 && (hash == htab->tls_get_addr
11129 || hash == htab->tls_get_addr_fd)
11130 && section->has_tls_reloc
11131 && irela != internal_relocs)
11132 {
11133 /* Get tls info. */
11134 unsigned char *tls_mask;
11135
11136 if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms,
11137 irela - 1, input_bfd))
11138 goto error_ret_free_internal;
11139 if (*tls_mask != 0)
11140 continue;
11141 }
11142
11143 /* Support for grouping stub sections. */
11144 id_sec = htab->stub_group[section->id].link_sec;
11145
11146 /* Get the name of this stub. */
11147 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
11148 if (!stub_name)
11149 goto error_ret_free_internal;
11150
11151 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
11152 stub_name, FALSE, FALSE);
11153 if (stub_entry != NULL)
11154 {
11155 /* The proper stub has already been created. */
11156 free (stub_name);
11157 continue;
11158 }
11159
11160 stub_entry = ppc_add_stub (stub_name, section, info);
11161 if (stub_entry == NULL)
11162 {
11163 free (stub_name);
11164 error_ret_free_internal:
11165 if (elf_section_data (section)->relocs == NULL)
11166 free (internal_relocs);
11167 error_ret_free_local:
11168 if (local_syms != NULL
11169 && (symtab_hdr->contents
11170 != (unsigned char *) local_syms))
11171 free (local_syms);
11172 return FALSE;
11173 }
11174
11175 stub_entry->stub_type = stub_type;
11176 if (stub_type != ppc_stub_plt_call)
11177 {
11178 stub_entry->target_value = code_value;
11179 stub_entry->target_section = code_sec;
11180 }
11181 else
11182 {
11183 stub_entry->target_value = sym_value;
11184 stub_entry->target_section = sym_sec;
11185 }
11186 stub_entry->h = hash;
11187 stub_entry->plt_ent = plt_ent;
11188 stub_entry->addend = irela->r_addend;
11189
11190 if (stub_entry->h != NULL)
11191 htab->stub_globals += 1;
11192 }
11193
11194 /* We're done with the internal relocs, free them. */
11195 if (elf_section_data (section)->relocs != internal_relocs)
11196 free (internal_relocs);
11197 }
11198
11199 if (local_syms != NULL
11200 && symtab_hdr->contents != (unsigned char *) local_syms)
11201 {
11202 if (!info->keep_memory)
11203 free (local_syms);
11204 else
11205 symtab_hdr->contents = (unsigned char *) local_syms;
11206 }
11207 }
11208
11209 /* We may have added some stubs. Find out the new size of the
11210 stub sections. */
11211 for (stub_sec = htab->stub_bfd->sections;
11212 stub_sec != NULL;
11213 stub_sec = stub_sec->next)
11214 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11215 {
11216 stub_sec->rawsize = stub_sec->size;
11217 stub_sec->size = 0;
11218 stub_sec->reloc_count = 0;
11219 stub_sec->flags &= ~SEC_RELOC;
11220 }
11221
11222 htab->brlt->size = 0;
11223 htab->brlt->reloc_count = 0;
11224 htab->brlt->flags &= ~SEC_RELOC;
11225 if (htab->relbrlt != NULL)
11226 htab->relbrlt->size = 0;
11227
11228 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info);
11229
11230 if (info->emitrelocations
11231 && htab->glink != NULL && htab->glink->size != 0)
11232 {
11233 htab->glink->reloc_count = 1;
11234 htab->glink->flags |= SEC_RELOC;
11235 }
11236
11237 if (htab->glink_eh_frame != NULL
11238 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
11239 && (htab->glink_eh_frame->flags & SEC_EXCLUDE) == 0)
11240 {
11241 bfd_size_type size = 0;
11242
11243 for (stub_sec = htab->stub_bfd->sections;
11244 stub_sec != NULL;
11245 stub_sec = stub_sec->next)
11246 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11247 size += 20;
11248 if (htab->glink != NULL && htab->glink->size != 0)
11249 size += 24;
11250 if (size != 0)
11251 size += sizeof (glink_eh_frame_cie);
11252 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11253 htab->glink_eh_frame->size = size;
11254 }
11255
11256 for (stub_sec = htab->stub_bfd->sections;
11257 stub_sec != NULL;
11258 stub_sec = stub_sec->next)
11259 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11260 && stub_sec->rawsize != stub_sec->size)
11261 break;
11262
11263 /* Exit from this loop when no stubs have been added, and no stubs
11264 have changed size. */
11265 if (stub_sec == NULL
11266 && (htab->glink_eh_frame == NULL
11267 || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
11268 break;
11269
11270 /* Ask the linker to do its stuff. */
11271 (*htab->layout_sections_again) ();
11272 }
11273
11274 maybe_strip_output (info, htab->brlt);
11275 if (htab->glink_eh_frame != NULL)
11276 maybe_strip_output (info, htab->glink_eh_frame);
11277
11278 return TRUE;
11279 }
11280
11281 /* Called after we have determined section placement. If sections
11282 move, we'll be called again. Provide a value for TOCstart. */
11283
11284 bfd_vma
11285 ppc64_elf_toc (bfd *obfd)
11286 {
11287 asection *s;
11288 bfd_vma TOCstart;
11289
11290 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that
11291 order. The TOC starts where the first of these sections starts. */
11292 s = bfd_get_section_by_name (obfd, ".got");
11293 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11294 s = bfd_get_section_by_name (obfd, ".toc");
11295 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11296 s = bfd_get_section_by_name (obfd, ".tocbss");
11297 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11298 s = bfd_get_section_by_name (obfd, ".plt");
11299 if (s == NULL || (s->flags & SEC_EXCLUDE) != 0)
11300 {
11301 /* This may happen for
11302 o references to TOC base (SYM@toc / TOC[tc0]) without a
11303 .toc directive
11304 o bad linker script
11305 o --gc-sections and empty TOC sections
11306
11307 FIXME: Warn user? */
11308
11309 /* Look for a likely section. We probably won't even be
11310 using TOCstart. */
11311 for (s = obfd->sections; s != NULL; s = s->next)
11312 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY
11313 | SEC_EXCLUDE))
11314 == (SEC_ALLOC | SEC_SMALL_DATA))
11315 break;
11316 if (s == NULL)
11317 for (s = obfd->sections; s != NULL; s = s->next)
11318 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE))
11319 == (SEC_ALLOC | SEC_SMALL_DATA))
11320 break;
11321 if (s == NULL)
11322 for (s = obfd->sections; s != NULL; s = s->next)
11323 if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE))
11324 == SEC_ALLOC)
11325 break;
11326 if (s == NULL)
11327 for (s = obfd->sections; s != NULL; s = s->next)
11328 if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC)
11329 break;
11330 }
11331
11332 TOCstart = 0;
11333 if (s != NULL)
11334 TOCstart = s->output_section->vma + s->output_offset;
11335
11336 return TOCstart;
11337 }
11338
11339 /* Build all the stubs associated with the current output file.
11340 The stubs are kept in a hash table attached to the main linker
11341 hash table. This function is called via gldelf64ppc_finish. */
11342
11343 bfd_boolean
11344 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
11345 struct bfd_link_info *info,
11346 char **stats)
11347 {
11348 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11349 asection *stub_sec;
11350 bfd_byte *p;
11351 int stub_sec_count = 0;
11352
11353 if (htab == NULL)
11354 return FALSE;
11355
11356 htab->emit_stub_syms = emit_stub_syms;
11357
11358 /* Allocate memory to hold the linker stubs. */
11359 for (stub_sec = htab->stub_bfd->sections;
11360 stub_sec != NULL;
11361 stub_sec = stub_sec->next)
11362 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0
11363 && stub_sec->size != 0)
11364 {
11365 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size);
11366 if (stub_sec->contents == NULL)
11367 return FALSE;
11368 /* We want to check that built size is the same as calculated
11369 size. rawsize is a convenient location to use. */
11370 stub_sec->rawsize = stub_sec->size;
11371 stub_sec->size = 0;
11372 }
11373
11374 if (htab->glink != NULL && htab->glink->size != 0)
11375 {
11376 unsigned int indx;
11377 bfd_vma plt0;
11378
11379 /* Build the .glink plt call stub. */
11380 if (htab->emit_stub_syms)
11381 {
11382 struct elf_link_hash_entry *h;
11383 h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
11384 TRUE, FALSE, FALSE);
11385 if (h == NULL)
11386 return FALSE;
11387 if (h->root.type == bfd_link_hash_new)
11388 {
11389 h->root.type = bfd_link_hash_defined;
11390 h->root.u.def.section = htab->glink;
11391 h->root.u.def.value = 8;
11392 h->ref_regular = 1;
11393 h->def_regular = 1;
11394 h->ref_regular_nonweak = 1;
11395 h->forced_local = 1;
11396 h->non_elf = 0;
11397 }
11398 }
11399 plt0 = htab->plt->output_section->vma + htab->plt->output_offset - 16;
11400 if (info->emitrelocations)
11401 {
11402 Elf_Internal_Rela *r = get_relocs (htab->glink, 1);
11403 if (r == NULL)
11404 return FALSE;
11405 r->r_offset = (htab->glink->output_offset
11406 + htab->glink->output_section->vma);
11407 r->r_info = ELF64_R_INFO (0, R_PPC64_REL64);
11408 r->r_addend = plt0;
11409 }
11410 p = htab->glink->contents;
11411 plt0 -= htab->glink->output_section->vma + htab->glink->output_offset;
11412 bfd_put_64 (htab->glink->owner, plt0, p);
11413 p += 8;
11414 bfd_put_32 (htab->glink->owner, MFLR_R12, p);
11415 p += 4;
11416 bfd_put_32 (htab->glink->owner, BCL_20_31, p);
11417 p += 4;
11418 bfd_put_32 (htab->glink->owner, MFLR_R11, p);
11419 p += 4;
11420 bfd_put_32 (htab->glink->owner, LD_R2_M16R11, p);
11421 p += 4;
11422 bfd_put_32 (htab->glink->owner, MTLR_R12, p);
11423 p += 4;
11424 bfd_put_32 (htab->glink->owner, ADD_R12_R2_R11, p);
11425 p += 4;
11426 bfd_put_32 (htab->glink->owner, LD_R11_0R12, p);
11427 p += 4;
11428 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p);
11429 p += 4;
11430 bfd_put_32 (htab->glink->owner, MTCTR_R11, p);
11431 p += 4;
11432 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p);
11433 p += 4;
11434 bfd_put_32 (htab->glink->owner, BCTR, p);
11435 p += 4;
11436 while (p - htab->glink->contents < GLINK_CALL_STUB_SIZE)
11437 {
11438 bfd_put_32 (htab->glink->owner, NOP, p);
11439 p += 4;
11440 }
11441
11442 /* Build the .glink lazy link call stubs. */
11443 indx = 0;
11444 while (p < htab->glink->contents + htab->glink->size)
11445 {
11446 if (indx < 0x8000)
11447 {
11448 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p);
11449 p += 4;
11450 }
11451 else
11452 {
11453 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p);
11454 p += 4;
11455 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
11456 p += 4;
11457 }
11458 bfd_put_32 (htab->glink->owner,
11459 B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p);
11460 indx++;
11461 p += 4;
11462 }
11463 htab->glink->rawsize = p - htab->glink->contents;
11464 }
11465
11466 if (htab->brlt->size != 0)
11467 {
11468 htab->brlt->contents = bfd_zalloc (htab->brlt->owner,
11469 htab->brlt->size);
11470 if (htab->brlt->contents == NULL)
11471 return FALSE;
11472 }
11473 if (htab->relbrlt != NULL && htab->relbrlt->size != 0)
11474 {
11475 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner,
11476 htab->relbrlt->size);
11477 if (htab->relbrlt->contents == NULL)
11478 return FALSE;
11479 }
11480
11481 if (htab->glink_eh_frame != NULL
11482 && htab->glink_eh_frame->size != 0)
11483 {
11484 bfd_vma val;
11485
11486 p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
11487 if (p == NULL)
11488 return FALSE;
11489 htab->glink_eh_frame->contents = p;
11490
11491 htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
11492
11493 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
11494 /* CIE length (rewrite in case little-endian). */
11495 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
11496 p += sizeof (glink_eh_frame_cie);
11497
11498 for (stub_sec = htab->stub_bfd->sections;
11499 stub_sec != NULL;
11500 stub_sec = stub_sec->next)
11501 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11502 {
11503 /* FDE length. */
11504 bfd_put_32 (htab->elf.dynobj, 16, p);
11505 p += 4;
11506 /* CIE pointer. */
11507 val = p - htab->glink_eh_frame->contents;
11508 bfd_put_32 (htab->elf.dynobj, val, p);
11509 p += 4;
11510 /* Offset to stub section. */
11511 val = (stub_sec->output_section->vma
11512 + stub_sec->output_offset);
11513 val -= (htab->glink_eh_frame->output_section->vma
11514 + htab->glink_eh_frame->output_offset);
11515 val -= p - htab->glink_eh_frame->contents;
11516 if (val + 0x80000000 > 0xffffffff)
11517 {
11518 info->callbacks->einfo
11519 (_("%s offset too large for .eh_frame sdata4 encoding"),
11520 stub_sec->name);
11521 return FALSE;
11522 }
11523 bfd_put_32 (htab->elf.dynobj, val, p);
11524 p += 4;
11525 /* stub section size. */
11526 bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
11527 p += 4;
11528 /* Augmentation. */
11529 p += 1;
11530 /* Pad. */
11531 p += 3;
11532 }
11533 if (htab->glink != NULL && htab->glink->size != 0)
11534 {
11535 /* FDE length. */
11536 bfd_put_32 (htab->elf.dynobj, 20, p);
11537 p += 4;
11538 /* CIE pointer. */
11539 val = p - htab->glink_eh_frame->contents;
11540 bfd_put_32 (htab->elf.dynobj, val, p);
11541 p += 4;
11542 /* Offset to .glink. */
11543 val = (htab->glink->output_section->vma
11544 + htab->glink->output_offset
11545 + 8);
11546 val -= (htab->glink_eh_frame->output_section->vma
11547 + htab->glink_eh_frame->output_offset);
11548 val -= p - htab->glink_eh_frame->contents;
11549 if (val + 0x80000000 > 0xffffffff)
11550 {
11551 info->callbacks->einfo
11552 (_("%s offset too large for .eh_frame sdata4 encoding"),
11553 htab->glink->name);
11554 return FALSE;
11555 }
11556 bfd_put_32 (htab->elf.dynobj, val, p);
11557 p += 4;
11558 /* .glink size. */
11559 bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
11560 p += 4;
11561 /* Augmentation. */
11562 p += 1;
11563
11564 *p++ = DW_CFA_advance_loc + 1;
11565 *p++ = DW_CFA_register;
11566 *p++ = 65;
11567 *p++ = 12;
11568 *p++ = DW_CFA_advance_loc + 4;
11569 *p++ = DW_CFA_restore_extended;
11570 *p++ = 65;
11571 }
11572 htab->glink_eh_frame->size = p - htab->glink_eh_frame->contents;
11573 }
11574
11575 /* Build the stubs as directed by the stub hash table. */
11576 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
11577
11578 if (htab->relbrlt != NULL)
11579 htab->relbrlt->reloc_count = 0;
11580
11581 for (stub_sec = htab->stub_bfd->sections;
11582 stub_sec != NULL;
11583 stub_sec = stub_sec->next)
11584 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
11585 {
11586 stub_sec_count += 1;
11587 if (stub_sec->rawsize != stub_sec->size)
11588 break;
11589 }
11590
11591 if (stub_sec != NULL
11592 || htab->glink->rawsize != htab->glink->size
11593 || (htab->glink_eh_frame != NULL
11594 && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
11595 {
11596 htab->stub_error = TRUE;
11597 info->callbacks->einfo (_("stubs don't match calculated size\n"));
11598 }
11599
11600 if (htab->stub_error)
11601 return FALSE;
11602
11603 if (stats != NULL)
11604 {
11605 *stats = bfd_malloc (500);
11606 if (*stats == NULL)
11607 return FALSE;
11608
11609 sprintf (*stats, _("linker stubs in %u group%s\n"
11610 " branch %lu\n"
11611 " toc adjust %lu\n"
11612 " long branch %lu\n"
11613 " long toc adj %lu\n"
11614 " plt call %lu"),
11615 stub_sec_count,
11616 stub_sec_count == 1 ? "" : "s",
11617 htab->stub_count[ppc_stub_long_branch - 1],
11618 htab->stub_count[ppc_stub_long_branch_r2off - 1],
11619 htab->stub_count[ppc_stub_plt_branch - 1],
11620 htab->stub_count[ppc_stub_plt_branch_r2off - 1],
11621 htab->stub_count[ppc_stub_plt_call - 1]);
11622 }
11623 return TRUE;
11624 }
11625
11626 /* This function undoes the changes made by add_symbol_adjust. */
11627
11628 static bfd_boolean
11629 undo_symbol_twiddle (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED)
11630 {
11631 struct ppc_link_hash_entry *eh;
11632
11633 if (h->root.type == bfd_link_hash_indirect)
11634 return TRUE;
11635
11636 eh = (struct ppc_link_hash_entry *) h;
11637 if (eh->elf.root.type != bfd_link_hash_undefweak || !eh->was_undefined)
11638 return TRUE;
11639
11640 eh->elf.root.type = bfd_link_hash_undefined;
11641 return TRUE;
11642 }
11643
11644 void
11645 ppc64_elf_restore_symbols (struct bfd_link_info *info)
11646 {
11647 struct ppc_link_hash_table *htab = ppc_hash_table (info);
11648
11649 if (htab != NULL)
11650 elf_link_hash_traverse (&htab->elf, undo_symbol_twiddle, info);
11651 }
11652
11653 /* What to do when ld finds relocations against symbols defined in
11654 discarded sections. */
11655
11656 static unsigned int
11657 ppc64_elf_action_discarded (asection *sec)
11658 {
11659 if (strcmp (".opd", sec->name) == 0)
11660 return 0;
11661
11662 if (strcmp (".toc", sec->name) == 0)
11663 return 0;
11664
11665 if (strcmp (".toc1", sec->name) == 0)
11666 return 0;
11667
11668 return _bfd_elf_default_action_discarded (sec);
11669 }
11670
11671 /* REL points to a low-part reloc on a largetoc instruction sequence.
11672 Find the matching high-part reloc instruction and verify that it
11673 is addis REG,x,imm. If so, set *REG to x and return a pointer to
11674 the high-part reloc. */
11675
11676 static const Elf_Internal_Rela *
11677 ha_reloc_match (const Elf_Internal_Rela *relocs,
11678 const Elf_Internal_Rela *rel,
11679 unsigned int *reg,
11680 bfd_boolean match_addend,
11681 const bfd *input_bfd,
11682 const bfd_byte *contents)
11683 {
11684 enum elf_ppc64_reloc_type r_type, r_type_ha;
11685 bfd_vma r_info_ha, r_addend;
11686
11687 r_type = ELF64_R_TYPE (rel->r_info);
11688 switch (r_type)
11689 {
11690 case R_PPC64_GOT_TLSLD16_LO:
11691 case R_PPC64_GOT_TLSGD16_LO:
11692 case R_PPC64_GOT_TPREL16_LO_DS:
11693 case R_PPC64_GOT_DTPREL16_LO_DS:
11694 case R_PPC64_GOT16_LO:
11695 case R_PPC64_TOC16_LO:
11696 r_type_ha = r_type + 2;
11697 break;
11698 case R_PPC64_GOT16_LO_DS:
11699 r_type_ha = R_PPC64_GOT16_HA;
11700 break;
11701 case R_PPC64_TOC16_LO_DS:
11702 r_type_ha = R_PPC64_TOC16_HA;
11703 break;
11704 default:
11705 abort ();
11706 }
11707 r_info_ha = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), r_type_ha);
11708 r_addend = rel->r_addend;
11709
11710 while (--rel >= relocs)
11711 if (rel->r_info == r_info_ha
11712 && (!match_addend
11713 || rel->r_addend == r_addend))
11714 {
11715 const bfd_byte *p = contents + (rel->r_offset & ~3);
11716 unsigned int insn = bfd_get_32 (input_bfd, p);
11717 if ((insn & (0x3f << 26)) == (15u << 26) /* addis rt,x,imm */
11718 && (insn & (0x1f << 21)) == (*reg << 21))
11719 {
11720 *reg = (insn >> 16) & 0x1f;
11721 return rel;
11722 }
11723 break;
11724 }
11725 return NULL;
11726 }
11727
11728 /* The RELOCATE_SECTION function is called by the ELF backend linker
11729 to handle the relocations for a section.
11730
11731 The relocs are always passed as Rela structures; if the section
11732 actually uses Rel structures, the r_addend field will always be
11733 zero.
11734
11735 This function is responsible for adjust the section contents as
11736 necessary, and (if using Rela relocs and generating a
11737 relocatable output file) adjusting the reloc addend as
11738 necessary.
11739
11740 This function does not have to worry about setting the reloc
11741 address or the reloc symbol index.
11742
11743 LOCAL_SYMS is a pointer to the swapped in local symbols.
11744
11745 LOCAL_SECTIONS is an array giving the section in the input file
11746 corresponding to the st_shndx field of each local symbol.
11747
11748 The global hash table entry for the global symbols can be found
11749 via elf_sym_hashes (input_bfd).
11750
11751 When generating relocatable output, this function must handle
11752 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
11753 going to be the section symbol corresponding to the output
11754 section, which means that the addend must be adjusted
11755 accordingly. */
11756
11757 static bfd_boolean
11758 ppc64_elf_relocate_section (bfd *output_bfd,
11759 struct bfd_link_info *info,
11760 bfd *input_bfd,
11761 asection *input_section,
11762 bfd_byte *contents,
11763 Elf_Internal_Rela *relocs,
11764 Elf_Internal_Sym *local_syms,
11765 asection **local_sections)
11766 {
11767 struct ppc_link_hash_table *htab;
11768 Elf_Internal_Shdr *symtab_hdr;
11769 struct elf_link_hash_entry **sym_hashes;
11770 Elf_Internal_Rela *rel;
11771 Elf_Internal_Rela *relend;
11772 Elf_Internal_Rela outrel;
11773 bfd_byte *loc;
11774 struct got_entry **local_got_ents;
11775 unsigned char *ha_opt;
11776 bfd_vma TOCstart;
11777 bfd_boolean no_ha_opt;
11778 bfd_boolean ret = TRUE;
11779 bfd_boolean is_opd;
11780 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */
11781 bfd_boolean is_power4 = FALSE;
11782 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
11783
11784 /* Initialize howto table if needed. */
11785 if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
11786 ppc_howto_init ();
11787
11788 htab = ppc_hash_table (info);
11789 if (htab == NULL)
11790 return FALSE;
11791
11792 /* Don't relocate stub sections. */
11793 if (input_section->owner == htab->stub_bfd)
11794 return TRUE;
11795
11796 BFD_ASSERT (is_ppc64_elf (input_bfd));
11797
11798 local_got_ents = elf_local_got_ents (input_bfd);
11799 TOCstart = elf_gp (output_bfd);
11800 symtab_hdr = &elf_symtab_hdr (input_bfd);
11801 sym_hashes = elf_sym_hashes (input_bfd);
11802 is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd;
11803 ha_opt = NULL;
11804 no_ha_opt = FALSE;
11805
11806 rel = relocs;
11807 relend = relocs + input_section->reloc_count;
11808 for (; rel < relend; rel++)
11809 {
11810 enum elf_ppc64_reloc_type r_type;
11811 bfd_vma addend, orig_addend;
11812 bfd_reloc_status_type r;
11813 Elf_Internal_Sym *sym;
11814 asection *sec;
11815 struct elf_link_hash_entry *h_elf;
11816 struct ppc_link_hash_entry *h;
11817 struct ppc_link_hash_entry *fdh;
11818 const char *sym_name;
11819 unsigned long r_symndx, toc_symndx;
11820 bfd_vma toc_addend;
11821 unsigned char tls_mask, tls_gd, tls_type;
11822 unsigned char sym_type;
11823 bfd_vma relocation;
11824 bfd_boolean unresolved_reloc;
11825 bfd_boolean warned;
11826 unsigned int insn;
11827 unsigned int mask;
11828 struct ppc_stub_hash_entry *stub_entry;
11829 bfd_vma max_br_offset;
11830 bfd_vma from;
11831
11832 r_type = ELF64_R_TYPE (rel->r_info);
11833 r_symndx = ELF64_R_SYM (rel->r_info);
11834
11835 /* For old style R_PPC64_TOC relocs with a zero symbol, use the
11836 symbol of the previous ADDR64 reloc. The symbol gives us the
11837 proper TOC base to use. */
11838 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC)
11839 && rel != relocs
11840 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64
11841 && is_opd)
11842 r_symndx = ELF64_R_SYM (rel[-1].r_info);
11843
11844 sym = NULL;
11845 sec = NULL;
11846 h_elf = NULL;
11847 sym_name = NULL;
11848 unresolved_reloc = FALSE;
11849 warned = FALSE;
11850 orig_addend = rel->r_addend;
11851
11852 if (r_symndx < symtab_hdr->sh_info)
11853 {
11854 /* It's a local symbol. */
11855 struct _opd_sec_data *opd;
11856
11857 sym = local_syms + r_symndx;
11858 sec = local_sections[r_symndx];
11859 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
11860 sym_type = ELF64_ST_TYPE (sym->st_info);
11861 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
11862 opd = get_opd_info (sec);
11863 if (opd != NULL && opd->adjust != NULL)
11864 {
11865 long adjust = opd->adjust[(sym->st_value + rel->r_addend) / 8];
11866 if (adjust == -1)
11867 relocation = 0;
11868 else
11869 {
11870 /* If this is a relocation against the opd section sym
11871 and we have edited .opd, adjust the reloc addend so
11872 that ld -r and ld --emit-relocs output is correct.
11873 If it is a reloc against some other .opd symbol,
11874 then the symbol value will be adjusted later. */
11875 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
11876 rel->r_addend += adjust;
11877 else
11878 relocation += adjust;
11879 }
11880 }
11881 }
11882 else
11883 {
11884 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
11885 r_symndx, symtab_hdr, sym_hashes,
11886 h_elf, sec, relocation,
11887 unresolved_reloc, warned);
11888 sym_name = h_elf->root.root.string;
11889 sym_type = h_elf->type;
11890 }
11891 h = (struct ppc_link_hash_entry *) h_elf;
11892
11893 if (sec != NULL && elf_discarded_section (sec))
11894 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
11895 rel, relend,
11896 ppc64_elf_howto_table[r_type],
11897 contents);
11898
11899 if (info->relocatable)
11900 continue;
11901
11902 /* TLS optimizations. Replace instruction sequences and relocs
11903 based on information we collected in tls_optimize. We edit
11904 RELOCS so that --emit-relocs will output something sensible
11905 for the final instruction stream. */
11906 tls_mask = 0;
11907 tls_gd = 0;
11908 toc_symndx = 0;
11909 if (h != NULL)
11910 tls_mask = h->tls_mask;
11911 else if (local_got_ents != NULL)
11912 {
11913 struct plt_entry **local_plt = (struct plt_entry **)
11914 (local_got_ents + symtab_hdr->sh_info);
11915 unsigned char *lgot_masks = (unsigned char *)
11916 (local_plt + symtab_hdr->sh_info);
11917 tls_mask = lgot_masks[r_symndx];
11918 }
11919 if (tls_mask == 0
11920 && (r_type == R_PPC64_TLS
11921 || r_type == R_PPC64_TLSGD
11922 || r_type == R_PPC64_TLSLD))
11923 {
11924 /* Check for toc tls entries. */
11925 unsigned char *toc_tls;
11926
11927 if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
11928 &local_syms, rel, input_bfd))
11929 return FALSE;
11930
11931 if (toc_tls)
11932 tls_mask = *toc_tls;
11933 }
11934
11935 /* Check that tls relocs are used with tls syms, and non-tls
11936 relocs are used with non-tls syms. */
11937 if (r_symndx != STN_UNDEF
11938 && r_type != R_PPC64_NONE
11939 && (h == NULL
11940 || h->elf.root.type == bfd_link_hash_defined
11941 || h->elf.root.type == bfd_link_hash_defweak)
11942 && (IS_PPC64_TLS_RELOC (r_type)
11943 != (sym_type == STT_TLS
11944 || (sym_type == STT_SECTION
11945 && (sec->flags & SEC_THREAD_LOCAL) != 0))))
11946 {
11947 if (tls_mask != 0
11948 && (r_type == R_PPC64_TLS
11949 || r_type == R_PPC64_TLSGD
11950 || r_type == R_PPC64_TLSLD))
11951 /* R_PPC64_TLS is OK against a symbol in the TOC. */
11952 ;
11953 else
11954 info->callbacks->einfo
11955 (!IS_PPC64_TLS_RELOC (r_type)
11956 ? _("%H: %s used with TLS symbol %s\n")
11957 : _("%H: %s used with non-TLS symbol %s\n"),
11958 input_bfd, input_section, rel->r_offset,
11959 ppc64_elf_howto_table[r_type]->name,
11960 sym_name);
11961 }
11962
11963 /* Ensure reloc mapping code below stays sane. */
11964 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1
11965 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1
11966 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3)
11967 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3)
11968 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3)
11969 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3)
11970 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3)
11971 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3)
11972 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3)
11973 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3))
11974 abort ();
11975
11976 switch (r_type)
11977 {
11978 default:
11979 break;
11980
11981 case R_PPC64_LO_DS_OPT:
11982 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
11983 if ((insn & (0x3f << 26)) != 58u << 26)
11984 abort ();
11985 insn += (14u << 26) - (58u << 26);
11986 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
11987 r_type = R_PPC64_TOC16_LO;
11988 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
11989 break;
11990
11991 case R_PPC64_TOC16:
11992 case R_PPC64_TOC16_LO:
11993 case R_PPC64_TOC16_DS:
11994 case R_PPC64_TOC16_LO_DS:
11995 {
11996 /* Check for toc tls entries. */
11997 unsigned char *toc_tls;
11998 int retval;
11999
12000 retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend,
12001 &local_syms, rel, input_bfd);
12002 if (retval == 0)
12003 return FALSE;
12004
12005 if (toc_tls)
12006 {
12007 tls_mask = *toc_tls;
12008 if (r_type == R_PPC64_TOC16_DS
12009 || r_type == R_PPC64_TOC16_LO_DS)
12010 {
12011 if (tls_mask != 0
12012 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0)
12013 goto toctprel;
12014 }
12015 else
12016 {
12017 /* If we found a GD reloc pair, then we might be
12018 doing a GD->IE transition. */
12019 if (retval == 2)
12020 {
12021 tls_gd = TLS_TPRELGD;
12022 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12023 goto tls_ldgd_opt;
12024 }
12025 else if (retval == 3)
12026 {
12027 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12028 goto tls_ldgd_opt;
12029 }
12030 }
12031 }
12032 }
12033 break;
12034
12035 case R_PPC64_GOT_TPREL16_HI:
12036 case R_PPC64_GOT_TPREL16_HA:
12037 if (tls_mask != 0
12038 && (tls_mask & TLS_TPREL) == 0)
12039 {
12040 rel->r_offset -= d_offset;
12041 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12042 r_type = R_PPC64_NONE;
12043 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12044 }
12045 break;
12046
12047 case R_PPC64_GOT_TPREL16_DS:
12048 case R_PPC64_GOT_TPREL16_LO_DS:
12049 if (tls_mask != 0
12050 && (tls_mask & TLS_TPREL) == 0)
12051 {
12052 toctprel:
12053 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
12054 insn &= 31 << 21;
12055 insn |= 0x3c0d0000; /* addis 0,13,0 */
12056 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
12057 r_type = R_PPC64_TPREL16_HA;
12058 if (toc_symndx != 0)
12059 {
12060 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12061 rel->r_addend = toc_addend;
12062 /* We changed the symbol. Start over in order to
12063 get h, sym, sec etc. right. */
12064 rel--;
12065 continue;
12066 }
12067 else
12068 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12069 }
12070 break;
12071
12072 case R_PPC64_TLS:
12073 if (tls_mask != 0
12074 && (tls_mask & TLS_TPREL) == 0)
12075 {
12076 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
12077 insn = _bfd_elf_ppc_at_tls_transform (insn, 13);
12078 if (insn == 0)
12079 abort ();
12080 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12081 /* Was PPC64_TLS which sits on insn boundary, now
12082 PPC64_TPREL16_LO which is at low-order half-word. */
12083 rel->r_offset += d_offset;
12084 r_type = R_PPC64_TPREL16_LO;
12085 if (toc_symndx != 0)
12086 {
12087 rel->r_info = ELF64_R_INFO (toc_symndx, r_type);
12088 rel->r_addend = toc_addend;
12089 /* We changed the symbol. Start over in order to
12090 get h, sym, sec etc. right. */
12091 rel--;
12092 continue;
12093 }
12094 else
12095 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12096 }
12097 break;
12098
12099 case R_PPC64_GOT_TLSGD16_HI:
12100 case R_PPC64_GOT_TLSGD16_HA:
12101 tls_gd = TLS_TPRELGD;
12102 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12103 goto tls_gdld_hi;
12104 break;
12105
12106 case R_PPC64_GOT_TLSLD16_HI:
12107 case R_PPC64_GOT_TLSLD16_HA:
12108 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12109 {
12110 tls_gdld_hi:
12111 if ((tls_mask & tls_gd) != 0)
12112 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12113 + R_PPC64_GOT_TPREL16_DS);
12114 else
12115 {
12116 rel->r_offset -= d_offset;
12117 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12118 r_type = R_PPC64_NONE;
12119 }
12120 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12121 }
12122 break;
12123
12124 case R_PPC64_GOT_TLSGD16:
12125 case R_PPC64_GOT_TLSGD16_LO:
12126 tls_gd = TLS_TPRELGD;
12127 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12128 goto tls_ldgd_opt;
12129 break;
12130
12131 case R_PPC64_GOT_TLSLD16:
12132 case R_PPC64_GOT_TLSLD16_LO:
12133 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12134 {
12135 unsigned int insn1, insn2, insn3;
12136 bfd_vma offset;
12137
12138 tls_ldgd_opt:
12139 offset = (bfd_vma) -1;
12140 /* If not using the newer R_PPC64_TLSGD/LD to mark
12141 __tls_get_addr calls, we must trust that the call
12142 stays with its arg setup insns, ie. that the next
12143 reloc is the __tls_get_addr call associated with
12144 the current reloc. Edit both insns. */
12145 if (input_section->has_tls_get_addr_call
12146 && rel + 1 < relend
12147 && branch_reloc_hash_match (input_bfd, rel + 1,
12148 htab->tls_get_addr,
12149 htab->tls_get_addr_fd))
12150 offset = rel[1].r_offset;
12151 if ((tls_mask & tls_gd) != 0)
12152 {
12153 /* IE */
12154 insn1 = bfd_get_32 (output_bfd,
12155 contents + rel->r_offset - d_offset);
12156 insn1 &= (1 << 26) - (1 << 2);
12157 insn1 |= 58 << 26; /* ld */
12158 insn2 = 0x7c636a14; /* add 3,3,13 */
12159 if (offset != (bfd_vma) -1)
12160 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12161 if ((tls_mask & TLS_EXPLICIT) == 0)
12162 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3)
12163 + R_PPC64_GOT_TPREL16_DS);
12164 else
12165 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16;
12166 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12167 }
12168 else
12169 {
12170 /* LE */
12171 insn1 = 0x3c6d0000; /* addis 3,13,0 */
12172 insn2 = 0x38630000; /* addi 3,3,0 */
12173 if (tls_gd == 0)
12174 {
12175 /* Was an LD reloc. */
12176 if (toc_symndx)
12177 sec = local_sections[toc_symndx];
12178 for (r_symndx = 0;
12179 r_symndx < symtab_hdr->sh_info;
12180 r_symndx++)
12181 if (local_sections[r_symndx] == sec)
12182 break;
12183 if (r_symndx >= symtab_hdr->sh_info)
12184 r_symndx = STN_UNDEF;
12185 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12186 if (r_symndx != STN_UNDEF)
12187 rel->r_addend -= (local_syms[r_symndx].st_value
12188 + sec->output_offset
12189 + sec->output_section->vma);
12190 }
12191 else if (toc_symndx != 0)
12192 {
12193 r_symndx = toc_symndx;
12194 rel->r_addend = toc_addend;
12195 }
12196 r_type = R_PPC64_TPREL16_HA;
12197 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12198 if (offset != (bfd_vma) -1)
12199 {
12200 rel[1].r_info = ELF64_R_INFO (r_symndx,
12201 R_PPC64_TPREL16_LO);
12202 rel[1].r_offset = offset + d_offset;
12203 rel[1].r_addend = rel->r_addend;
12204 }
12205 }
12206 bfd_put_32 (output_bfd, insn1,
12207 contents + rel->r_offset - d_offset);
12208 if (offset != (bfd_vma) -1)
12209 {
12210 insn3 = bfd_get_32 (output_bfd,
12211 contents + offset + 4);
12212 if (insn3 == NOP
12213 || insn3 == CROR_151515 || insn3 == CROR_313131)
12214 {
12215 rel[1].r_offset += 4;
12216 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12217 insn2 = NOP;
12218 }
12219 bfd_put_32 (output_bfd, insn2, contents + offset);
12220 }
12221 if ((tls_mask & tls_gd) == 0
12222 && (tls_gd == 0 || toc_symndx != 0))
12223 {
12224 /* We changed the symbol. Start over in order
12225 to get h, sym, sec etc. right. */
12226 rel--;
12227 continue;
12228 }
12229 }
12230 break;
12231
12232 case R_PPC64_TLSGD:
12233 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
12234 {
12235 unsigned int insn2, insn3;
12236 bfd_vma offset = rel->r_offset;
12237
12238 if ((tls_mask & TLS_TPRELGD) != 0)
12239 {
12240 /* IE */
12241 r_type = R_PPC64_NONE;
12242 insn2 = 0x7c636a14; /* add 3,3,13 */
12243 }
12244 else
12245 {
12246 /* LE */
12247 if (toc_symndx != 0)
12248 {
12249 r_symndx = toc_symndx;
12250 rel->r_addend = toc_addend;
12251 }
12252 r_type = R_PPC64_TPREL16_LO;
12253 rel->r_offset = offset + d_offset;
12254 insn2 = 0x38630000; /* addi 3,3,0 */
12255 }
12256 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12257 /* Zap the reloc on the _tls_get_addr call too. */
12258 BFD_ASSERT (offset == rel[1].r_offset);
12259 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12260 insn3 = bfd_get_32 (output_bfd,
12261 contents + offset + 4);
12262 if (insn3 == NOP
12263 || insn3 == CROR_151515 || insn3 == CROR_313131)
12264 {
12265 rel->r_offset += 4;
12266 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12267 insn2 = NOP;
12268 }
12269 bfd_put_32 (output_bfd, insn2, contents + offset);
12270 if ((tls_mask & TLS_TPRELGD) == 0 && toc_symndx != 0)
12271 {
12272 rel--;
12273 continue;
12274 }
12275 }
12276 break;
12277
12278 case R_PPC64_TLSLD:
12279 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
12280 {
12281 unsigned int insn2, insn3;
12282 bfd_vma offset = rel->r_offset;
12283
12284 if (toc_symndx)
12285 sec = local_sections[toc_symndx];
12286 for (r_symndx = 0;
12287 r_symndx < symtab_hdr->sh_info;
12288 r_symndx++)
12289 if (local_sections[r_symndx] == sec)
12290 break;
12291 if (r_symndx >= symtab_hdr->sh_info)
12292 r_symndx = STN_UNDEF;
12293 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
12294 if (r_symndx != STN_UNDEF)
12295 rel->r_addend -= (local_syms[r_symndx].st_value
12296 + sec->output_offset
12297 + sec->output_section->vma);
12298
12299 r_type = R_PPC64_TPREL16_LO;
12300 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12301 rel->r_offset = offset + d_offset;
12302 /* Zap the reloc on the _tls_get_addr call too. */
12303 BFD_ASSERT (offset == rel[1].r_offset);
12304 rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE);
12305 insn2 = 0x38630000; /* addi 3,3,0 */
12306 insn3 = bfd_get_32 (output_bfd,
12307 contents + offset + 4);
12308 if (insn3 == NOP
12309 || insn3 == CROR_151515 || insn3 == CROR_313131)
12310 {
12311 rel->r_offset += 4;
12312 bfd_put_32 (output_bfd, insn2, contents + offset + 4);
12313 insn2 = NOP;
12314 }
12315 bfd_put_32 (output_bfd, insn2, contents + offset);
12316 rel--;
12317 continue;
12318 }
12319 break;
12320
12321 case R_PPC64_DTPMOD64:
12322 if (rel + 1 < relend
12323 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)
12324 && rel[1].r_offset == rel->r_offset + 8)
12325 {
12326 if ((tls_mask & TLS_GD) == 0)
12327 {
12328 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE);
12329 if ((tls_mask & TLS_TPRELGD) != 0)
12330 r_type = R_PPC64_TPREL64;
12331 else
12332 {
12333 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12334 r_type = R_PPC64_NONE;
12335 }
12336 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12337 }
12338 }
12339 else
12340 {
12341 if ((tls_mask & TLS_LD) == 0)
12342 {
12343 bfd_put_64 (output_bfd, 1, contents + rel->r_offset);
12344 r_type = R_PPC64_NONE;
12345 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12346 }
12347 }
12348 break;
12349
12350 case R_PPC64_TPREL64:
12351 if ((tls_mask & TLS_TPREL) == 0)
12352 {
12353 r_type = R_PPC64_NONE;
12354 rel->r_info = ELF64_R_INFO (r_symndx, r_type);
12355 }
12356 break;
12357 }
12358
12359 /* Handle other relocations that tweak non-addend part of insn. */
12360 insn = 0;
12361 max_br_offset = 1 << 25;
12362 addend = rel->r_addend;
12363 switch (r_type)
12364 {
12365 default:
12366 break;
12367
12368 /* Branch taken prediction relocations. */
12369 case R_PPC64_ADDR14_BRTAKEN:
12370 case R_PPC64_REL14_BRTAKEN:
12371 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
12372 /* Fall thru. */
12373
12374 /* Branch not taken prediction relocations. */
12375 case R_PPC64_ADDR14_BRNTAKEN:
12376 case R_PPC64_REL14_BRNTAKEN:
12377 insn |= bfd_get_32 (output_bfd,
12378 contents + rel->r_offset) & ~(0x01 << 21);
12379 /* Fall thru. */
12380
12381 case R_PPC64_REL14:
12382 max_br_offset = 1 << 15;
12383 /* Fall thru. */
12384
12385 case R_PPC64_REL24:
12386 /* Calls to functions with a different TOC, such as calls to
12387 shared objects, need to alter the TOC pointer. This is
12388 done using a linkage stub. A REL24 branching to these
12389 linkage stubs needs to be followed by a nop, as the nop
12390 will be replaced with an instruction to restore the TOC
12391 base pointer. */
12392 fdh = h;
12393 if (h != NULL
12394 && h->oh != NULL
12395 && h->oh->is_func_descriptor)
12396 fdh = ppc_follow_link (h->oh);
12397 stub_entry = ppc_get_stub_entry (input_section, sec, fdh, rel, htab);
12398 if (stub_entry != NULL
12399 && (stub_entry->stub_type == ppc_stub_plt_call
12400 || stub_entry->stub_type == ppc_stub_plt_branch_r2off
12401 || stub_entry->stub_type == ppc_stub_long_branch_r2off))
12402 {
12403 bfd_boolean can_plt_call = FALSE;
12404
12405 if (rel->r_offset + 8 <= input_section->size)
12406 {
12407 unsigned long nop;
12408 nop = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
12409 if (nop == NOP
12410 || nop == CROR_151515 || nop == CROR_313131)
12411 {
12412 if (h != NULL
12413 && (h == htab->tls_get_addr_fd
12414 || h == htab->tls_get_addr)
12415 && !htab->no_tls_get_addr_opt)
12416 {
12417 /* Special stub used, leave nop alone. */
12418 }
12419 else
12420 bfd_put_32 (input_bfd, LD_R2_40R1,
12421 contents + rel->r_offset + 4);
12422 can_plt_call = TRUE;
12423 }
12424 }
12425
12426 if (!can_plt_call)
12427 {
12428 if (stub_entry->stub_type == ppc_stub_plt_call)
12429 {
12430 /* If this is a plain branch rather than a branch
12431 and link, don't require a nop. However, don't
12432 allow tail calls in a shared library as they
12433 will result in r2 being corrupted. */
12434 unsigned long br;
12435 br = bfd_get_32 (input_bfd, contents + rel->r_offset);
12436 if (info->executable && (br & 1) == 0)
12437 can_plt_call = TRUE;
12438 else
12439 stub_entry = NULL;
12440 }
12441 else if (h != NULL
12442 && strcmp (h->elf.root.root.string,
12443 ".__libc_start_main") == 0)
12444 {
12445 /* Allow crt1 branch to go via a toc adjusting stub. */
12446 can_plt_call = TRUE;
12447 }
12448 else
12449 {
12450 if (strcmp (input_section->output_section->name,
12451 ".init") == 0
12452 || strcmp (input_section->output_section->name,
12453 ".fini") == 0)
12454 info->callbacks->einfo
12455 (_("%H: automatic multiple TOCs "
12456 "not supported using your crt files; "
12457 "recompile with -mminimal-toc or upgrade gcc\n"),
12458 input_bfd, input_section, rel->r_offset);
12459 else
12460 info->callbacks->einfo
12461 (_("%H: sibling call optimization to `%s' "
12462 "does not allow automatic multiple TOCs; "
12463 "recompile with -mminimal-toc or "
12464 "-fno-optimize-sibling-calls, "
12465 "or make `%s' extern\n"),
12466 input_bfd, input_section, rel->r_offset,
12467 sym_name,
12468 sym_name);
12469 bfd_set_error (bfd_error_bad_value);
12470 ret = FALSE;
12471 }
12472 }
12473
12474 if (can_plt_call
12475 && stub_entry->stub_type == ppc_stub_plt_call)
12476 unresolved_reloc = FALSE;
12477 }
12478
12479 if ((stub_entry == NULL
12480 || stub_entry->stub_type == ppc_stub_long_branch
12481 || stub_entry->stub_type == ppc_stub_plt_branch)
12482 && get_opd_info (sec) != NULL)
12483 {
12484 /* The branch destination is the value of the opd entry. */
12485 bfd_vma off = (relocation + addend
12486 - sec->output_section->vma
12487 - sec->output_offset);
12488 bfd_vma dest = opd_entry_value (sec, off, NULL, NULL);
12489 if (dest != (bfd_vma) -1)
12490 {
12491 relocation = dest;
12492 addend = 0;
12493 }
12494 }
12495
12496 /* If the branch is out of reach we ought to have a long
12497 branch stub. */
12498 from = (rel->r_offset
12499 + input_section->output_offset
12500 + input_section->output_section->vma);
12501
12502 if (stub_entry != NULL
12503 && (stub_entry->stub_type == ppc_stub_long_branch
12504 || stub_entry->stub_type == ppc_stub_plt_branch)
12505 && (r_type == R_PPC64_ADDR14_BRTAKEN
12506 || r_type == R_PPC64_ADDR14_BRNTAKEN
12507 || (relocation + addend - from + max_br_offset
12508 < 2 * max_br_offset)))
12509 /* Don't use the stub if this branch is in range. */
12510 stub_entry = NULL;
12511
12512 if (stub_entry != NULL)
12513 {
12514 /* Munge up the value and addend so that we call the stub
12515 rather than the procedure directly. */
12516 relocation = (stub_entry->stub_offset
12517 + stub_entry->stub_sec->output_offset
12518 + stub_entry->stub_sec->output_section->vma);
12519 addend = 0;
12520 }
12521
12522 if (insn != 0)
12523 {
12524 if (is_power4)
12525 {
12526 /* Set 'a' bit. This is 0b00010 in BO field for branch
12527 on CR(BI) insns (BO == 001at or 011at), and 0b01000
12528 for branch on CTR insns (BO == 1a00t or 1a01t). */
12529 if ((insn & (0x14 << 21)) == (0x04 << 21))
12530 insn |= 0x02 << 21;
12531 else if ((insn & (0x14 << 21)) == (0x10 << 21))
12532 insn |= 0x08 << 21;
12533 else
12534 break;
12535 }
12536 else
12537 {
12538 /* Invert 'y' bit if not the default. */
12539 if ((bfd_signed_vma) (relocation + addend - from) < 0)
12540 insn ^= 0x01 << 21;
12541 }
12542
12543 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
12544 }
12545
12546 /* NOP out calls to undefined weak functions.
12547 We can thus call a weak function without first
12548 checking whether the function is defined. */
12549 else if (h != NULL
12550 && h->elf.root.type == bfd_link_hash_undefweak
12551 && h->elf.dynindx == -1
12552 && r_type == R_PPC64_REL24
12553 && relocation == 0
12554 && addend == 0)
12555 {
12556 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
12557 continue;
12558 }
12559 break;
12560 }
12561
12562 /* Set `addend'. */
12563 tls_type = 0;
12564 switch (r_type)
12565 {
12566 default:
12567 info->callbacks->einfo
12568 (_("%B: unknown relocation type %d for symbol %s\n"),
12569 input_bfd, (int) r_type, sym_name);
12570
12571 bfd_set_error (bfd_error_bad_value);
12572 ret = FALSE;
12573 continue;
12574
12575 case R_PPC64_NONE:
12576 case R_PPC64_TLS:
12577 case R_PPC64_TLSGD:
12578 case R_PPC64_TLSLD:
12579 case R_PPC64_GNU_VTINHERIT:
12580 case R_PPC64_GNU_VTENTRY:
12581 continue;
12582
12583 /* GOT16 relocations. Like an ADDR16 using the symbol's
12584 address in the GOT as relocation value instead of the
12585 symbol's value itself. Also, create a GOT entry for the
12586 symbol and put the symbol value there. */
12587 case R_PPC64_GOT_TLSGD16:
12588 case R_PPC64_GOT_TLSGD16_LO:
12589 case R_PPC64_GOT_TLSGD16_HI:
12590 case R_PPC64_GOT_TLSGD16_HA:
12591 tls_type = TLS_TLS | TLS_GD;
12592 goto dogot;
12593
12594 case R_PPC64_GOT_TLSLD16:
12595 case R_PPC64_GOT_TLSLD16_LO:
12596 case R_PPC64_GOT_TLSLD16_HI:
12597 case R_PPC64_GOT_TLSLD16_HA:
12598 tls_type = TLS_TLS | TLS_LD;
12599 goto dogot;
12600
12601 case R_PPC64_GOT_TPREL16_DS:
12602 case R_PPC64_GOT_TPREL16_LO_DS:
12603 case R_PPC64_GOT_TPREL16_HI:
12604 case R_PPC64_GOT_TPREL16_HA:
12605 tls_type = TLS_TLS | TLS_TPREL;
12606 goto dogot;
12607
12608 case R_PPC64_GOT_DTPREL16_DS:
12609 case R_PPC64_GOT_DTPREL16_LO_DS:
12610 case R_PPC64_GOT_DTPREL16_HI:
12611 case R_PPC64_GOT_DTPREL16_HA:
12612 tls_type = TLS_TLS | TLS_DTPREL;
12613 goto dogot;
12614
12615 case R_PPC64_GOT16:
12616 case R_PPC64_GOT16_LO:
12617 case R_PPC64_GOT16_HI:
12618 case R_PPC64_GOT16_HA:
12619 case R_PPC64_GOT16_DS:
12620 case R_PPC64_GOT16_LO_DS:
12621 dogot:
12622 {
12623 /* Relocation is to the entry for this symbol in the global
12624 offset table. */
12625 asection *got;
12626 bfd_vma *offp;
12627 bfd_vma off;
12628 unsigned long indx = 0;
12629 struct got_entry *ent;
12630
12631 if (tls_type == (TLS_TLS | TLS_LD)
12632 && (h == NULL
12633 || !h->elf.def_dynamic))
12634 ent = ppc64_tlsld_got (input_bfd);
12635 else
12636 {
12637
12638 if (h != NULL)
12639 {
12640 bfd_boolean dyn = htab->elf.dynamic_sections_created;
12641 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
12642 &h->elf)
12643 || (info->shared
12644 && SYMBOL_CALLS_LOCAL (info, &h->elf)))
12645 /* This is actually a static link, or it is a
12646 -Bsymbolic link and the symbol is defined
12647 locally, or the symbol was forced to be local
12648 because of a version file. */
12649 ;
12650 else
12651 {
12652 indx = h->elf.dynindx;
12653 unresolved_reloc = FALSE;
12654 }
12655 ent = h->elf.got.glist;
12656 }
12657 else
12658 {
12659 if (local_got_ents == NULL)
12660 abort ();
12661 ent = local_got_ents[r_symndx];
12662 }
12663
12664 for (; ent != NULL; ent = ent->next)
12665 if (ent->addend == orig_addend
12666 && ent->owner == input_bfd
12667 && ent->tls_type == tls_type)
12668 break;
12669 }
12670
12671 if (ent == NULL)
12672 abort ();
12673 if (ent->is_indirect)
12674 ent = ent->got.ent;
12675 offp = &ent->got.offset;
12676 got = ppc64_elf_tdata (ent->owner)->got;
12677 if (got == NULL)
12678 abort ();
12679
12680 /* The offset must always be a multiple of 8. We use the
12681 least significant bit to record whether we have already
12682 processed this entry. */
12683 off = *offp;
12684 if ((off & 1) != 0)
12685 off &= ~1;
12686 else
12687 {
12688 /* Generate relocs for the dynamic linker, except in
12689 the case of TLSLD where we'll use one entry per
12690 module. */
12691 asection *relgot;
12692 bfd_boolean ifunc;
12693
12694 *offp = off | 1;
12695 relgot = NULL;
12696 ifunc = (h != NULL
12697 ? h->elf.type == STT_GNU_IFUNC
12698 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC);
12699 if ((info->shared || indx != 0)
12700 && (h == NULL
12701 || (tls_type == (TLS_TLS | TLS_LD)
12702 && !h->elf.def_dynamic)
12703 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12704 || h->elf.root.type != bfd_link_hash_undefweak))
12705 relgot = ppc64_elf_tdata (ent->owner)->relgot;
12706 else if (ifunc)
12707 relgot = htab->reliplt;
12708 if (relgot != NULL)
12709 {
12710 outrel.r_offset = (got->output_section->vma
12711 + got->output_offset
12712 + off);
12713 outrel.r_addend = addend;
12714 if (tls_type & (TLS_LD | TLS_GD))
12715 {
12716 outrel.r_addend = 0;
12717 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64);
12718 if (tls_type == (TLS_TLS | TLS_GD))
12719 {
12720 loc = relgot->contents;
12721 loc += (relgot->reloc_count++
12722 * sizeof (Elf64_External_Rela));
12723 bfd_elf64_swap_reloca_out (output_bfd,
12724 &outrel, loc);
12725 outrel.r_offset += 8;
12726 outrel.r_addend = addend;
12727 outrel.r_info
12728 = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12729 }
12730 }
12731 else if (tls_type == (TLS_TLS | TLS_DTPREL))
12732 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64);
12733 else if (tls_type == (TLS_TLS | TLS_TPREL))
12734 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64);
12735 else if (indx != 0)
12736 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT);
12737 else
12738 {
12739 if (ifunc)
12740 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
12741 else
12742 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
12743
12744 /* Write the .got section contents for the sake
12745 of prelink. */
12746 loc = got->contents + off;
12747 bfd_put_64 (output_bfd, outrel.r_addend + relocation,
12748 loc);
12749 }
12750
12751 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD))
12752 {
12753 outrel.r_addend += relocation;
12754 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL))
12755 outrel.r_addend -= htab->elf.tls_sec->vma;
12756 }
12757 loc = relgot->contents;
12758 loc += (relgot->reloc_count++
12759 * sizeof (Elf64_External_Rela));
12760 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
12761 }
12762
12763 /* Init the .got section contents here if we're not
12764 emitting a reloc. */
12765 else
12766 {
12767 relocation += addend;
12768 if (tls_type == (TLS_TLS | TLS_LD))
12769 relocation = 1;
12770 else if (tls_type != 0)
12771 {
12772 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET;
12773 if (tls_type == (TLS_TLS | TLS_TPREL))
12774 relocation += DTP_OFFSET - TP_OFFSET;
12775
12776 if (tls_type == (TLS_TLS | TLS_GD))
12777 {
12778 bfd_put_64 (output_bfd, relocation,
12779 got->contents + off + 8);
12780 relocation = 1;
12781 }
12782 }
12783
12784 bfd_put_64 (output_bfd, relocation,
12785 got->contents + off);
12786 }
12787 }
12788
12789 if (off >= (bfd_vma) -2)
12790 abort ();
12791
12792 relocation = got->output_section->vma + got->output_offset + off;
12793 addend = -(TOCstart + htab->stub_group[input_section->id].toc_off);
12794 }
12795 break;
12796
12797 case R_PPC64_PLT16_HA:
12798 case R_PPC64_PLT16_HI:
12799 case R_PPC64_PLT16_LO:
12800 case R_PPC64_PLT32:
12801 case R_PPC64_PLT64:
12802 /* Relocation is to the entry for this symbol in the
12803 procedure linkage table. */
12804
12805 /* Resolve a PLT reloc against a local symbol directly,
12806 without using the procedure linkage table. */
12807 if (h == NULL)
12808 break;
12809
12810 /* It's possible that we didn't make a PLT entry for this
12811 symbol. This happens when statically linking PIC code,
12812 or when using -Bsymbolic. Go find a match if there is a
12813 PLT entry. */
12814 if (htab->plt != NULL)
12815 {
12816 struct plt_entry *ent;
12817 for (ent = h->elf.plt.plist; ent != NULL; ent = ent->next)
12818 if (ent->addend == orig_addend
12819 && ent->plt.offset != (bfd_vma) -1)
12820 {
12821 relocation = (htab->plt->output_section->vma
12822 + htab->plt->output_offset
12823 + ent->plt.offset);
12824 unresolved_reloc = FALSE;
12825 }
12826 }
12827 break;
12828
12829 case R_PPC64_TOC:
12830 /* Relocation value is TOC base. */
12831 relocation = TOCstart;
12832 if (r_symndx == STN_UNDEF)
12833 relocation += htab->stub_group[input_section->id].toc_off;
12834 else if (unresolved_reloc)
12835 ;
12836 else if (sec != NULL && sec->id <= htab->top_id)
12837 relocation += htab->stub_group[sec->id].toc_off;
12838 else
12839 unresolved_reloc = TRUE;
12840 goto dodyn;
12841
12842 /* TOC16 relocs. We want the offset relative to the TOC base,
12843 which is the address of the start of the TOC plus 0x8000.
12844 The TOC consists of sections .got, .toc, .tocbss, and .plt,
12845 in this order. */
12846 case R_PPC64_TOC16:
12847 case R_PPC64_TOC16_LO:
12848 case R_PPC64_TOC16_HI:
12849 case R_PPC64_TOC16_DS:
12850 case R_PPC64_TOC16_LO_DS:
12851 case R_PPC64_TOC16_HA:
12852 addend -= TOCstart + htab->stub_group[input_section->id].toc_off;
12853 break;
12854
12855 /* Relocate against the beginning of the section. */
12856 case R_PPC64_SECTOFF:
12857 case R_PPC64_SECTOFF_LO:
12858 case R_PPC64_SECTOFF_HI:
12859 case R_PPC64_SECTOFF_DS:
12860 case R_PPC64_SECTOFF_LO_DS:
12861 case R_PPC64_SECTOFF_HA:
12862 if (sec != NULL)
12863 addend -= sec->output_section->vma;
12864 break;
12865
12866 case R_PPC64_REL16:
12867 case R_PPC64_REL16_LO:
12868 case R_PPC64_REL16_HI:
12869 case R_PPC64_REL16_HA:
12870 break;
12871
12872 case R_PPC64_REL14:
12873 case R_PPC64_REL14_BRNTAKEN:
12874 case R_PPC64_REL14_BRTAKEN:
12875 case R_PPC64_REL24:
12876 break;
12877
12878 case R_PPC64_TPREL16:
12879 case R_PPC64_TPREL16_LO:
12880 case R_PPC64_TPREL16_HI:
12881 case R_PPC64_TPREL16_HA:
12882 case R_PPC64_TPREL16_DS:
12883 case R_PPC64_TPREL16_LO_DS:
12884 case R_PPC64_TPREL16_HIGHER:
12885 case R_PPC64_TPREL16_HIGHERA:
12886 case R_PPC64_TPREL16_HIGHEST:
12887 case R_PPC64_TPREL16_HIGHESTA:
12888 if (h != NULL
12889 && h->elf.root.type == bfd_link_hash_undefweak
12890 && h->elf.dynindx == -1)
12891 {
12892 /* Make this relocation against an undefined weak symbol
12893 resolve to zero. This is really just a tweak, since
12894 code using weak externs ought to check that they are
12895 defined before using them. */
12896 bfd_byte *p = contents + rel->r_offset - d_offset;
12897
12898 insn = bfd_get_32 (output_bfd, p);
12899 insn = _bfd_elf_ppc_at_tprel_transform (insn, 13);
12900 if (insn != 0)
12901 bfd_put_32 (output_bfd, insn, p);
12902 break;
12903 }
12904 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12905 if (info->shared)
12906 /* The TPREL16 relocs shouldn't really be used in shared
12907 libs as they will result in DT_TEXTREL being set, but
12908 support them anyway. */
12909 goto dodyn;
12910 break;
12911
12912 case R_PPC64_DTPREL16:
12913 case R_PPC64_DTPREL16_LO:
12914 case R_PPC64_DTPREL16_HI:
12915 case R_PPC64_DTPREL16_HA:
12916 case R_PPC64_DTPREL16_DS:
12917 case R_PPC64_DTPREL16_LO_DS:
12918 case R_PPC64_DTPREL16_HIGHER:
12919 case R_PPC64_DTPREL16_HIGHERA:
12920 case R_PPC64_DTPREL16_HIGHEST:
12921 case R_PPC64_DTPREL16_HIGHESTA:
12922 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12923 break;
12924
12925 case R_PPC64_DTPMOD64:
12926 relocation = 1;
12927 addend = 0;
12928 goto dodyn;
12929
12930 case R_PPC64_TPREL64:
12931 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
12932 goto dodyn;
12933
12934 case R_PPC64_DTPREL64:
12935 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
12936 /* Fall thru */
12937
12938 /* Relocations that may need to be propagated if this is a
12939 dynamic object. */
12940 case R_PPC64_REL30:
12941 case R_PPC64_REL32:
12942 case R_PPC64_REL64:
12943 case R_PPC64_ADDR14:
12944 case R_PPC64_ADDR14_BRNTAKEN:
12945 case R_PPC64_ADDR14_BRTAKEN:
12946 case R_PPC64_ADDR16:
12947 case R_PPC64_ADDR16_DS:
12948 case R_PPC64_ADDR16_HA:
12949 case R_PPC64_ADDR16_HI:
12950 case R_PPC64_ADDR16_HIGHER:
12951 case R_PPC64_ADDR16_HIGHERA:
12952 case R_PPC64_ADDR16_HIGHEST:
12953 case R_PPC64_ADDR16_HIGHESTA:
12954 case R_PPC64_ADDR16_LO:
12955 case R_PPC64_ADDR16_LO_DS:
12956 case R_PPC64_ADDR24:
12957 case R_PPC64_ADDR32:
12958 case R_PPC64_ADDR64:
12959 case R_PPC64_UADDR16:
12960 case R_PPC64_UADDR32:
12961 case R_PPC64_UADDR64:
12962 dodyn:
12963 if ((input_section->flags & SEC_ALLOC) == 0)
12964 break;
12965
12966 if (NO_OPD_RELOCS && is_opd)
12967 break;
12968
12969 if ((info->shared
12970 && (h == NULL
12971 || ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
12972 || h->elf.root.type != bfd_link_hash_undefweak)
12973 && (must_be_dyn_reloc (info, r_type)
12974 || !SYMBOL_CALLS_LOCAL (info, &h->elf)))
12975 || (ELIMINATE_COPY_RELOCS
12976 && !info->shared
12977 && h != NULL
12978 && h->elf.dynindx != -1
12979 && !h->elf.non_got_ref
12980 && !h->elf.def_regular)
12981 || (!info->shared
12982 && (h != NULL
12983 ? h->elf.type == STT_GNU_IFUNC
12984 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)))
12985 {
12986 bfd_boolean skip, relocate;
12987 asection *sreloc;
12988 bfd_vma out_off;
12989
12990 /* When generating a dynamic object, these relocations
12991 are copied into the output file to be resolved at run
12992 time. */
12993
12994 skip = FALSE;
12995 relocate = FALSE;
12996
12997 out_off = _bfd_elf_section_offset (output_bfd, info,
12998 input_section, rel->r_offset);
12999 if (out_off == (bfd_vma) -1)
13000 skip = TRUE;
13001 else if (out_off == (bfd_vma) -2)
13002 skip = TRUE, relocate = TRUE;
13003 out_off += (input_section->output_section->vma
13004 + input_section->output_offset);
13005 outrel.r_offset = out_off;
13006 outrel.r_addend = rel->r_addend;
13007
13008 /* Optimize unaligned reloc use. */
13009 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0)
13010 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0))
13011 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64;
13012 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0)
13013 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0))
13014 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32;
13015 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0)
13016 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0))
13017 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16;
13018
13019 if (skip)
13020 memset (&outrel, 0, sizeof outrel);
13021 else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
13022 && !is_opd
13023 && r_type != R_PPC64_TOC)
13024 outrel.r_info = ELF64_R_INFO (h->elf.dynindx, r_type);
13025 else
13026 {
13027 /* This symbol is local, or marked to become local,
13028 or this is an opd section reloc which must point
13029 at a local function. */
13030 outrel.r_addend += relocation;
13031 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
13032 {
13033 if (is_opd && h != NULL)
13034 {
13035 /* Lie about opd entries. This case occurs
13036 when building shared libraries and we
13037 reference a function in another shared
13038 lib. The same thing happens for a weak
13039 definition in an application that's
13040 overridden by a strong definition in a
13041 shared lib. (I believe this is a generic
13042 bug in binutils handling of weak syms.)
13043 In these cases we won't use the opd
13044 entry in this lib. */
13045 unresolved_reloc = FALSE;
13046 }
13047 if (!is_opd
13048 && r_type == R_PPC64_ADDR64
13049 && (h != NULL
13050 ? h->elf.type == STT_GNU_IFUNC
13051 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))
13052 outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE);
13053 else
13054 {
13055 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
13056
13057 /* We need to relocate .opd contents for ld.so.
13058 Prelink also wants simple and consistent rules
13059 for relocs. This make all RELATIVE relocs have
13060 *r_offset equal to r_addend. */
13061 relocate = TRUE;
13062 }
13063 }
13064 else
13065 {
13066 long indx = 0;
13067
13068 if (h != NULL
13069 ? h->elf.type == STT_GNU_IFUNC
13070 : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
13071 {
13072 info->callbacks->einfo
13073 (_("%H: relocation %s for indirect "
13074 "function %s unsupported\n"),
13075 input_bfd, input_section, rel->r_offset,
13076 ppc64_elf_howto_table[r_type]->name,
13077 sym_name);
13078 ret = FALSE;
13079 }
13080 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
13081 ;
13082 else if (sec == NULL || sec->owner == NULL)
13083 {
13084 bfd_set_error (bfd_error_bad_value);
13085 return FALSE;
13086 }
13087 else
13088 {
13089 asection *osec;
13090
13091 osec = sec->output_section;
13092 indx = elf_section_data (osec)->dynindx;
13093
13094 if (indx == 0)
13095 {
13096 if ((osec->flags & SEC_READONLY) == 0
13097 && htab->elf.data_index_section != NULL)
13098 osec = htab->elf.data_index_section;
13099 else
13100 osec = htab->elf.text_index_section;
13101 indx = elf_section_data (osec)->dynindx;
13102 }
13103 BFD_ASSERT (indx != 0);
13104
13105 /* We are turning this relocation into one
13106 against a section symbol, so subtract out
13107 the output section's address but not the
13108 offset of the input section in the output
13109 section. */
13110 outrel.r_addend -= osec->vma;
13111 }
13112
13113 outrel.r_info = ELF64_R_INFO (indx, r_type);
13114 }
13115 }
13116
13117 sreloc = elf_section_data (input_section)->sreloc;
13118 if (!htab->elf.dynamic_sections_created)
13119 sreloc = htab->reliplt;
13120 if (sreloc == NULL)
13121 abort ();
13122
13123 if (sreloc->reloc_count * sizeof (Elf64_External_Rela)
13124 >= sreloc->size)
13125 abort ();
13126 loc = sreloc->contents;
13127 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
13128 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
13129
13130 /* If this reloc is against an external symbol, it will
13131 be computed at runtime, so there's no need to do
13132 anything now. However, for the sake of prelink ensure
13133 that the section contents are a known value. */
13134 if (! relocate)
13135 {
13136 unresolved_reloc = FALSE;
13137 /* The value chosen here is quite arbitrary as ld.so
13138 ignores section contents except for the special
13139 case of .opd where the contents might be accessed
13140 before relocation. Choose zero, as that won't
13141 cause reloc overflow. */
13142 relocation = 0;
13143 addend = 0;
13144 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs
13145 to improve backward compatibility with older
13146 versions of ld. */
13147 if (r_type == R_PPC64_ADDR64)
13148 addend = outrel.r_addend;
13149 /* Adjust pc_relative relocs to have zero in *r_offset. */
13150 else if (ppc64_elf_howto_table[r_type]->pc_relative)
13151 addend = (input_section->output_section->vma
13152 + input_section->output_offset
13153 + rel->r_offset);
13154 }
13155 }
13156 break;
13157
13158 case R_PPC64_COPY:
13159 case R_PPC64_GLOB_DAT:
13160 case R_PPC64_JMP_SLOT:
13161 case R_PPC64_JMP_IREL:
13162 case R_PPC64_RELATIVE:
13163 /* We shouldn't ever see these dynamic relocs in relocatable
13164 files. */
13165 /* Fall through. */
13166
13167 case R_PPC64_PLTGOT16:
13168 case R_PPC64_PLTGOT16_DS:
13169 case R_PPC64_PLTGOT16_HA:
13170 case R_PPC64_PLTGOT16_HI:
13171 case R_PPC64_PLTGOT16_LO:
13172 case R_PPC64_PLTGOT16_LO_DS:
13173 case R_PPC64_PLTREL32:
13174 case R_PPC64_PLTREL64:
13175 /* These ones haven't been implemented yet. */
13176
13177 info->callbacks->einfo
13178 (_("%B: relocation %s is not supported for symbol %s\n"),
13179 input_bfd,
13180 ppc64_elf_howto_table[r_type]->name, sym_name);
13181
13182 bfd_set_error (bfd_error_invalid_operation);
13183 ret = FALSE;
13184 continue;
13185 }
13186
13187 /* Multi-instruction sequences that access the TOC can be
13188 optimized, eg. addis ra,r2,0; addi rb,ra,x;
13189 to nop; addi rb,r2,x; */
13190 switch (r_type)
13191 {
13192 default:
13193 break;
13194
13195 case R_PPC64_GOT_TLSLD16_HI:
13196 case R_PPC64_GOT_TLSGD16_HI:
13197 case R_PPC64_GOT_TPREL16_HI:
13198 case R_PPC64_GOT_DTPREL16_HI:
13199 case R_PPC64_GOT16_HI:
13200 case R_PPC64_TOC16_HI:
13201 /* These relocs would only be useful if building up an
13202 offset to later add to r2, perhaps in an indexed
13203 addressing mode instruction. Don't try to optimize.
13204 Unfortunately, the possibility of someone building up an
13205 offset like this or even with the HA relocs, means that
13206 we need to check the high insn when optimizing the low
13207 insn. */
13208 break;
13209
13210 case R_PPC64_GOT_TLSLD16_HA:
13211 case R_PPC64_GOT_TLSGD16_HA:
13212 case R_PPC64_GOT_TPREL16_HA:
13213 case R_PPC64_GOT_DTPREL16_HA:
13214 case R_PPC64_GOT16_HA:
13215 case R_PPC64_TOC16_HA:
13216 /* nop is done later. */
13217 break;
13218
13219 case R_PPC64_GOT_TLSLD16_LO:
13220 case R_PPC64_GOT_TLSGD16_LO:
13221 case R_PPC64_GOT_TPREL16_LO_DS:
13222 case R_PPC64_GOT_DTPREL16_LO_DS:
13223 case R_PPC64_GOT16_LO:
13224 case R_PPC64_GOT16_LO_DS:
13225 case R_PPC64_TOC16_LO:
13226 case R_PPC64_TOC16_LO_DS:
13227 if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000)
13228 {
13229 bfd_byte *p = contents + (rel->r_offset & ~3);
13230 insn = bfd_get_32 (input_bfd, p);
13231 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
13232 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
13233 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
13234 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
13235 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
13236 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
13237 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
13238 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
13239 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
13240 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
13241 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
13242 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
13243 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
13244 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
13245 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
13246 && (insn & 3) != 1)
13247 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
13248 && ((insn & 3) == 0 || (insn & 3) == 3)))
13249 {
13250 unsigned int reg = (insn >> 16) & 0x1f;
13251 const Elf_Internal_Rela *ha;
13252 bfd_boolean match_addend;
13253
13254 match_addend = (sym != NULL
13255 && ELF_ST_TYPE (sym->st_info) == STT_SECTION);
13256 ha = ha_reloc_match (relocs, rel, &reg, match_addend,
13257 input_bfd, contents);
13258 if (ha != NULL)
13259 {
13260 insn &= ~(0x1f << 16);
13261 insn |= reg << 16;
13262 bfd_put_32 (input_bfd, insn, p);
13263 if (ha_opt == NULL)
13264 {
13265 ha_opt = bfd_zmalloc (input_section->reloc_count);
13266 if (ha_opt == NULL)
13267 return FALSE;
13268 }
13269 ha_opt[ha - relocs] = 1;
13270 }
13271 else
13272 /* If we don't find a matching high part insn,
13273 something is fishy. Refuse to nop any high
13274 part insn in this section. */
13275 no_ha_opt = TRUE;
13276 }
13277 }
13278 break;
13279 }
13280
13281 /* Do any further special processing. */
13282 switch (r_type)
13283 {
13284 default:
13285 break;
13286
13287 case R_PPC64_ADDR16_HA:
13288 case R_PPC64_REL16_HA:
13289 case R_PPC64_ADDR16_HIGHERA:
13290 case R_PPC64_ADDR16_HIGHESTA:
13291 case R_PPC64_TOC16_HA:
13292 case R_PPC64_SECTOFF_HA:
13293 case R_PPC64_TPREL16_HA:
13294 case R_PPC64_DTPREL16_HA:
13295 case R_PPC64_TPREL16_HIGHER:
13296 case R_PPC64_TPREL16_HIGHERA:
13297 case R_PPC64_TPREL16_HIGHEST:
13298 case R_PPC64_TPREL16_HIGHESTA:
13299 case R_PPC64_DTPREL16_HIGHER:
13300 case R_PPC64_DTPREL16_HIGHERA:
13301 case R_PPC64_DTPREL16_HIGHEST:
13302 case R_PPC64_DTPREL16_HIGHESTA:
13303 /* It's just possible that this symbol is a weak symbol
13304 that's not actually defined anywhere. In that case,
13305 'sec' would be NULL, and we should leave the symbol
13306 alone (it will be set to zero elsewhere in the link). */
13307 if (sec == NULL)
13308 break;
13309 /* Fall thru */
13310
13311 case R_PPC64_GOT16_HA:
13312 case R_PPC64_PLTGOT16_HA:
13313 case R_PPC64_PLT16_HA:
13314 case R_PPC64_GOT_TLSGD16_HA:
13315 case R_PPC64_GOT_TLSLD16_HA:
13316 case R_PPC64_GOT_TPREL16_HA:
13317 case R_PPC64_GOT_DTPREL16_HA:
13318 /* Add 0x10000 if sign bit in 0:15 is set.
13319 Bits 0:15 are not used. */
13320 addend += 0x8000;
13321 break;
13322
13323 case R_PPC64_ADDR16_DS:
13324 case R_PPC64_ADDR16_LO_DS:
13325 case R_PPC64_GOT16_DS:
13326 case R_PPC64_GOT16_LO_DS:
13327 case R_PPC64_PLT16_LO_DS:
13328 case R_PPC64_SECTOFF_DS:
13329 case R_PPC64_SECTOFF_LO_DS:
13330 case R_PPC64_TOC16_DS:
13331 case R_PPC64_TOC16_LO_DS:
13332 case R_PPC64_PLTGOT16_DS:
13333 case R_PPC64_PLTGOT16_LO_DS:
13334 case R_PPC64_GOT_TPREL16_DS:
13335 case R_PPC64_GOT_TPREL16_LO_DS:
13336 case R_PPC64_GOT_DTPREL16_DS:
13337 case R_PPC64_GOT_DTPREL16_LO_DS:
13338 case R_PPC64_TPREL16_DS:
13339 case R_PPC64_TPREL16_LO_DS:
13340 case R_PPC64_DTPREL16_DS:
13341 case R_PPC64_DTPREL16_LO_DS:
13342 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
13343 mask = 3;
13344 /* If this reloc is against an lq insn, then the value must be
13345 a multiple of 16. This is somewhat of a hack, but the
13346 "correct" way to do this by defining _DQ forms of all the
13347 _DS relocs bloats all reloc switches in this file. It
13348 doesn't seem to make much sense to use any of these relocs
13349 in data, so testing the insn should be safe. */
13350 if ((insn & (0x3f << 26)) == (56u << 26))
13351 mask = 15;
13352 if (((relocation + addend) & mask) != 0)
13353 {
13354 info->callbacks->einfo
13355 (_("%H: error: %s not a multiple of %u\n"),
13356 input_bfd, input_section, rel->r_offset,
13357 ppc64_elf_howto_table[r_type]->name,
13358 mask + 1);
13359 bfd_set_error (bfd_error_bad_value);
13360 ret = FALSE;
13361 continue;
13362 }
13363 break;
13364 }
13365
13366 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
13367 because such sections are not SEC_ALLOC and thus ld.so will
13368 not process them. */
13369 if (unresolved_reloc
13370 && !((input_section->flags & SEC_DEBUGGING) != 0
13371 && h->elf.def_dynamic))
13372 {
13373 info->callbacks->einfo
13374 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
13375 input_bfd, input_section, rel->r_offset,
13376 ppc64_elf_howto_table[(int) r_type]->name,
13377 h->elf.root.root.string);
13378 ret = FALSE;
13379 }
13380
13381 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
13382 input_bfd,
13383 input_section,
13384 contents,
13385 rel->r_offset,
13386 relocation,
13387 addend);
13388
13389 if (r != bfd_reloc_ok)
13390 {
13391 if (sym_name == NULL)
13392 sym_name = "(null)";
13393 if (r == bfd_reloc_overflow)
13394 {
13395 if (warned)
13396 continue;
13397 if (h != NULL
13398 && h->elf.root.type == bfd_link_hash_undefweak
13399 && ppc64_elf_howto_table[r_type]->pc_relative)
13400 {
13401 /* Assume this is a call protected by other code that
13402 detects the symbol is undefined. If this is the case,
13403 we can safely ignore the overflow. If not, the
13404 program is hosed anyway, and a little warning isn't
13405 going to help. */
13406
13407 continue;
13408 }
13409
13410 if (!((*info->callbacks->reloc_overflow)
13411 (info, (h ? &h->elf.root : NULL), sym_name,
13412 ppc64_elf_howto_table[r_type]->name,
13413 orig_addend, input_bfd, input_section, rel->r_offset)))
13414 return FALSE;
13415 }
13416 else
13417 {
13418 info->callbacks->einfo
13419 (_("%H: %s reloc against `%s': error %d\n"),
13420 input_bfd, input_section, rel->r_offset,
13421 ppc64_elf_howto_table[r_type]->name,
13422 sym_name,
13423 (int) r);
13424 ret = FALSE;
13425 }
13426 }
13427 }
13428
13429 if (ha_opt != NULL)
13430 {
13431 if (!no_ha_opt)
13432 {
13433 unsigned char *opt = ha_opt;
13434 rel = relocs;
13435 relend = relocs + input_section->reloc_count;
13436 for (; rel < relend; opt++, rel++)
13437 if (*opt != 0)
13438 {
13439 bfd_byte *p = contents + (rel->r_offset & ~3);
13440 bfd_put_32 (input_bfd, NOP, p);
13441 }
13442 }
13443 free (ha_opt);
13444 }
13445
13446 /* If we're emitting relocations, then shortly after this function
13447 returns, reloc offsets and addends for this section will be
13448 adjusted. Worse, reloc symbol indices will be for the output
13449 file rather than the input. Save a copy of the relocs for
13450 opd_entry_value. */
13451 if (is_opd && (info->emitrelocations || info->relocatable))
13452 {
13453 bfd_size_type amt;
13454 amt = input_section->reloc_count * sizeof (Elf_Internal_Rela);
13455 rel = bfd_alloc (input_bfd, amt);
13456 BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd_relocs == NULL);
13457 ppc64_elf_tdata (input_bfd)->opd_relocs = rel;
13458 if (rel == NULL)
13459 return FALSE;
13460 memcpy (rel, relocs, amt);
13461 }
13462 return ret;
13463 }
13464
13465 /* Adjust the value of any local symbols in opd sections. */
13466
13467 static int
13468 ppc64_elf_output_symbol_hook (struct bfd_link_info *info,
13469 const char *name ATTRIBUTE_UNUSED,
13470 Elf_Internal_Sym *elfsym,
13471 asection *input_sec,
13472 struct elf_link_hash_entry *h)
13473 {
13474 struct _opd_sec_data *opd;
13475 long adjust;
13476 bfd_vma value;
13477
13478 if (h != NULL)
13479 return 1;
13480
13481 opd = get_opd_info (input_sec);
13482 if (opd == NULL || opd->adjust == NULL)
13483 return 1;
13484
13485 value = elfsym->st_value - input_sec->output_offset;
13486 if (!info->relocatable)
13487 value -= input_sec->output_section->vma;
13488
13489 adjust = opd->adjust[value / 8];
13490 if (adjust == -1)
13491 return 2;
13492
13493 elfsym->st_value += adjust;
13494 return 1;
13495 }
13496
13497 /* Finish up dynamic symbol handling. We set the contents of various
13498 dynamic sections here. */
13499
13500 static bfd_boolean
13501 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd,
13502 struct bfd_link_info *info,
13503 struct elf_link_hash_entry *h,
13504 Elf_Internal_Sym *sym)
13505 {
13506 struct ppc_link_hash_table *htab;
13507 struct plt_entry *ent;
13508 Elf_Internal_Rela rela;
13509 bfd_byte *loc;
13510
13511 htab = ppc_hash_table (info);
13512 if (htab == NULL)
13513 return FALSE;
13514
13515 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
13516 if (ent->plt.offset != (bfd_vma) -1)
13517 {
13518 /* This symbol has an entry in the procedure linkage
13519 table. Set it up. */
13520 if (!htab->elf.dynamic_sections_created
13521 || h->dynindx == -1)
13522 {
13523 BFD_ASSERT (h->type == STT_GNU_IFUNC
13524 && h->def_regular
13525 && (h->root.type == bfd_link_hash_defined
13526 || h->root.type == bfd_link_hash_defweak));
13527 rela.r_offset = (htab->iplt->output_section->vma
13528 + htab->iplt->output_offset
13529 + ent->plt.offset);
13530 rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL);
13531 rela.r_addend = (h->root.u.def.value
13532 + h->root.u.def.section->output_offset
13533 + h->root.u.def.section->output_section->vma
13534 + ent->addend);
13535 loc = (htab->reliplt->contents
13536 + (htab->reliplt->reloc_count++
13537 * sizeof (Elf64_External_Rela)));
13538 }
13539 else
13540 {
13541 rela.r_offset = (htab->plt->output_section->vma
13542 + htab->plt->output_offset
13543 + ent->plt.offset);
13544 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
13545 rela.r_addend = ent->addend;
13546 loc = (htab->relplt->contents
13547 + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE)
13548 / (PLT_ENTRY_SIZE / sizeof (Elf64_External_Rela))));
13549 }
13550 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13551 }
13552
13553 if (h->needs_copy)
13554 {
13555 /* This symbol needs a copy reloc. Set it up. */
13556
13557 if (h->dynindx == -1
13558 || (h->root.type != bfd_link_hash_defined
13559 && h->root.type != bfd_link_hash_defweak)
13560 || htab->relbss == NULL)
13561 abort ();
13562
13563 rela.r_offset = (h->root.u.def.value
13564 + h->root.u.def.section->output_section->vma
13565 + h->root.u.def.section->output_offset);
13566 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
13567 rela.r_addend = 0;
13568 loc = htab->relbss->contents;
13569 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela);
13570 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
13571 }
13572
13573 /* Mark some specially defined symbols as absolute. */
13574 if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
13575 sym->st_shndx = SHN_ABS;
13576
13577 return TRUE;
13578 }
13579
13580 /* Used to decide how to sort relocs in an optimal manner for the
13581 dynamic linker, before writing them out. */
13582
13583 static enum elf_reloc_type_class
13584 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela)
13585 {
13586 enum elf_ppc64_reloc_type r_type;
13587
13588 r_type = ELF64_R_TYPE (rela->r_info);
13589 switch (r_type)
13590 {
13591 case R_PPC64_RELATIVE:
13592 return reloc_class_relative;
13593 case R_PPC64_JMP_SLOT:
13594 return reloc_class_plt;
13595 case R_PPC64_COPY:
13596 return reloc_class_copy;
13597 default:
13598 return reloc_class_normal;
13599 }
13600 }
13601
13602 /* Finish up the dynamic sections. */
13603
13604 static bfd_boolean
13605 ppc64_elf_finish_dynamic_sections (bfd *output_bfd,
13606 struct bfd_link_info *info)
13607 {
13608 struct ppc_link_hash_table *htab;
13609 bfd *dynobj;
13610 asection *sdyn;
13611
13612 htab = ppc_hash_table (info);
13613 if (htab == NULL)
13614 return FALSE;
13615
13616 dynobj = htab->elf.dynobj;
13617 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
13618
13619 if (htab->elf.dynamic_sections_created)
13620 {
13621 Elf64_External_Dyn *dyncon, *dynconend;
13622
13623 if (sdyn == NULL || htab->got == NULL)
13624 abort ();
13625
13626 dyncon = (Elf64_External_Dyn *) sdyn->contents;
13627 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
13628 for (; dyncon < dynconend; dyncon++)
13629 {
13630 Elf_Internal_Dyn dyn;
13631 asection *s;
13632
13633 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
13634
13635 switch (dyn.d_tag)
13636 {
13637 default:
13638 continue;
13639
13640 case DT_PPC64_GLINK:
13641 s = htab->glink;
13642 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13643 /* We stupidly defined DT_PPC64_GLINK to be the start
13644 of glink rather than the first entry point, which is
13645 what ld.so needs, and now have a bigger stub to
13646 support automatic multiple TOCs. */
13647 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32;
13648 break;
13649
13650 case DT_PPC64_OPD:
13651 s = bfd_get_section_by_name (output_bfd, ".opd");
13652 if (s == NULL)
13653 continue;
13654 dyn.d_un.d_ptr = s->vma;
13655 break;
13656
13657 case DT_PPC64_OPDSZ:
13658 s = bfd_get_section_by_name (output_bfd, ".opd");
13659 if (s == NULL)
13660 continue;
13661 dyn.d_un.d_val = s->size;
13662 break;
13663
13664 case DT_PLTGOT:
13665 s = htab->plt;
13666 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13667 break;
13668
13669 case DT_JMPREL:
13670 s = htab->relplt;
13671 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
13672 break;
13673
13674 case DT_PLTRELSZ:
13675 dyn.d_un.d_val = htab->relplt->size;
13676 break;
13677
13678 case DT_RELASZ:
13679 /* Don't count procedure linkage table relocs in the
13680 overall reloc count. */
13681 s = htab->relplt;
13682 if (s == NULL)
13683 continue;
13684 dyn.d_un.d_val -= s->size;
13685 break;
13686
13687 case DT_RELA:
13688 /* We may not be using the standard ELF linker script.
13689 If .rela.plt is the first .rela section, we adjust
13690 DT_RELA to not include it. */
13691 s = htab->relplt;
13692 if (s == NULL)
13693 continue;
13694 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
13695 continue;
13696 dyn.d_un.d_ptr += s->size;
13697 break;
13698 }
13699
13700 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
13701 }
13702 }
13703
13704 if (htab->got != NULL && htab->got->size != 0)
13705 {
13706 /* Fill in the first entry in the global offset table.
13707 We use it to hold the link-time TOCbase. */
13708 bfd_put_64 (output_bfd,
13709 elf_gp (output_bfd) + TOC_BASE_OFF,
13710 htab->got->contents);
13711
13712 /* Set .got entry size. */
13713 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8;
13714 }
13715
13716 if (htab->plt != NULL && htab->plt->size != 0)
13717 {
13718 /* Set .plt entry size. */
13719 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize
13720 = PLT_ENTRY_SIZE;
13721 }
13722
13723 /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for
13724 brlt ourselves if emitrelocations. */
13725 if (htab->brlt != NULL
13726 && htab->brlt->reloc_count != 0
13727 && !_bfd_elf_link_output_relocs (output_bfd,
13728 htab->brlt,
13729 elf_section_data (htab->brlt)->rela.hdr,
13730 elf_section_data (htab->brlt)->relocs,
13731 NULL))
13732 return FALSE;
13733
13734 if (htab->glink != NULL
13735 && htab->glink->reloc_count != 0
13736 && !_bfd_elf_link_output_relocs (output_bfd,
13737 htab->glink,
13738 elf_section_data (htab->glink)->rela.hdr,
13739 elf_section_data (htab->glink)->relocs,
13740 NULL))
13741 return FALSE;
13742
13743
13744 if (htab->glink_eh_frame != NULL
13745 && htab->glink_eh_frame->sec_info_type == ELF_INFO_TYPE_EH_FRAME
13746 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
13747 htab->glink_eh_frame,
13748 htab->glink_eh_frame->contents))
13749 return FALSE;
13750
13751 /* We need to handle writing out multiple GOT sections ourselves,
13752 since we didn't add them to DYNOBJ. We know dynobj is the first
13753 bfd. */
13754 while ((dynobj = dynobj->link_next) != NULL)
13755 {
13756 asection *s;
13757
13758 if (!is_ppc64_elf (dynobj))
13759 continue;
13760
13761 s = ppc64_elf_tdata (dynobj)->got;
13762 if (s != NULL
13763 && s->size != 0
13764 && s->output_section != bfd_abs_section_ptr
13765 && !bfd_set_section_contents (output_bfd, s->output_section,
13766 s->contents, s->output_offset,
13767 s->size))
13768 return FALSE;
13769 s = ppc64_elf_tdata (dynobj)->relgot;
13770 if (s != NULL
13771 && s->size != 0
13772 && s->output_section != bfd_abs_section_ptr
13773 && !bfd_set_section_contents (output_bfd, s->output_section,
13774 s->contents, s->output_offset,
13775 s->size))
13776 return FALSE;
13777 }
13778
13779 return TRUE;
13780 }
13781
13782 #include "elf64-target.h"
GDB Binutils - Deliverables
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